JP5365893B2 - Rotating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door which is closed on its own because the same force acts from anywhere when a person lets go of the door, which characteristically prevents the person from feeling the door heavy when the door is opened, though the door is tightly closed without involving an impact, after being closed by slow rotation, and the rotational speed of which can be finely adjusted though the door is operated by a spring. <P>SOLUTION: The rotational speed is set at a barely operable speed by adjusting a driving section which is composed of a cam wheel and a cam body capable of being started by a fixed rotational force from any opened position. The door has the function of being stopped once immediately before closing by relaying a spring acting only during the rotation to a spring acting only in tight closing, and of being tightly closed while reducing a speed after the slow rotation. The door has the structural feature of reducing the speed without use of friction resistance by controlling the magnitude of the rotational force transmitted to the door. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

The present invention relates to a door.

The present invention relates to a door that stores a closing force on a spring when it is opened, and that can be closed on its own regardless of where the hand is released. In order to prevent the door from stopping in the middle of closing the door no matter where you release your hand, the rotational force must continue to act on the door, and when the force acts on the door, the rotational speed of the door accelerates, so the door closes Accordingly, the rotational speed of the door accelerates, and when the door is closed, the rotational speed of the door reaches the maximum value, accompanied by a severe impact sound.
When force is applied, the speed of movement is accelerated. Since force is applied to the door everywhere, the rotational speed of the door continues to accelerate while decelerating even if decelerated. In the present invention, the rotational speed that has reached the maximum value immediately before the door closes (hereinafter referred to as just before closing) is reduced to reduce the impact, and the door is rotated until it hits the door (hereinafter referred to as sealed). It is designed to be sealed.

To prevent the closed door from opening again, the door is equipped with an anti-reverse device (hereinafter referred to as a latch device) that fits into a hole in the door frame. In addition to the door rotation, the task of operating the latch device is added.
Therefore, the force that presses the door against the door and seals it is greater than the force of the spring that causes the door to close without permission. Moreover, the maximum force for pressing the door against the door is required at the final stage of closing the door where the spring force is weakened.
When opening the door, the spring force is the above-mentioned “maximum force to press against the door (hereinafter referred to as sealing force)”. When the door is opened, this is the initial value, and the spring force increases. To do. In other words, when the door is opened, the increased sealing force has an effect until the end. The present invention is designed to minimize the force required to open the door and maximize the sealing force.

If a strong force is applied to the end in the process of closing the door, it will grow as the inertia force closes, and the impact when the door closes will increase. A product called a door closer usually decelerates against the acceleration of the door caused by the inertial force due to the viscous resistance of oil and other frictional resistance. Then, I felt heavier when opening the door.
The present invention processes the rotating operation for closing the door and the closing operation at the end separately, and acts only when the spring for closing the door is closed so that it does not work when the door is sealed. It prevents the door from feeling heavy when opened.

Conventional door closing devices, for example, Patent Documents 1 to 5, rotate the door until the door is closed from the fully open state by the force of sealing the door at the end, and, as in the present application, fully open the range for rotating the door. It is not a rotating device that stops from the state to just before closing, and a sealing device that rotates the door only in the range from immediately before closing to closing. In the sealing device of the present application, even if the sealing force is increased, the rotation of the door does not become fast. became.
The conventional speed reducer is not limited to Patent Documents 1 to 5, and the sealing force is weakened by applying a force in the opposite direction to the sealing force. The device of the present application reduces the rotational force while preserving the sealing force. It does not weaken the sealing force by applying a force in the opposite direction such as resistance, but it controls the rotational force by changing the direction in which the force works, minimizing the force required to close and seal the door. ing.

Patent Documents 1 to 5 relate to door shock absorbers that are decelerated or temporarily stopped immediately before closing, and these shock absorbers do not have a function of sealing like the sealing device of the present application. Further, the shock absorbers of Patent Documents 4 and 5 are attached to a position close to the handle of the door and away from the rotation axis of the door, and a distance to apply a brake to a long circular locus away from the rotation axis of the door. Is shorter, the braking time is shorter and the deceleration is almost close to a collision. Patent Documents 4 and 5 and other general shock absorbers are intended to stop a door that is closed by preserving a strong sealing force, and are not intended to decelerate a door that has lost the sealing force as in the present invention. .
Patent Documents 6 to 9 are a series of inventions related to the applicant's door and have not been disclosed yet, but have already described the rotating device and the sealing device of the present application.

JP-A-9-177425 JP 2006-63557 A JP2007-39917 JP 2003-286787 A Japanese Patent Application No. 2006-144419 Japanese Patent Application No. 2007-087561 Japanese Patent Application No. 2007-198248 Japanese Patent Application No. 2007-265603 Japanese Patent Application No. 2007-319541

The door of the present invention is a door that closes by itself when the hand is released from anywhere, and closes at low speed, and then closes the door strongly without impact, even when opening the door. The door has a characteristic that the door does not feel heavy and provides a door that can finely adjust the rotation speed of the door even if it moves with a spring, providing a door that stops temporarily before the door closes It is. That is, it aims at having performance equal to or higher than that of a door closer that slows down the closing speed by the generally popular viscous resistance of oil.
Even if you release your hand from anywhere at low speed, it will not stop and will start barely closing, so that at any position where you open the door, you will not be able to apply more force than is necessary to barely start closing. In order to prevent the door from feeling heavy when the door is opened, the door should be opened with equal force from the beginning to the end when the door is opened.
The first challenge to achieve the “objective performance equal to or better than a door closer” is the minimum force necessary and sufficient for the rotational force acting on the door to “become barely stopped and begin to close. It is to be always constant at any position where the door is opened.

Even if you try to adjust the rotation speed of the door by adjusting the spring, the door that moves with a normal spring either stops or closes quickly even if it moves, and adjusts the rotation speed of the door Can not.
The rotational force acting on the door, which is “the minimum force necessary and sufficient to start closing without staying stationary” differs depending on the door. It is necessary to be able to cope with it and to be able to adjust the rotational speed of the door to the minimum speed even for one door.
The second problem for achieving the “object having performance equal to or better than that of the door closer” is to adjust the rotational force acting on the door.

The force to seal the door works to rotate the latch loaded on the side of the door while rotating the door, so it is stronger than the force to simply close the door, and the door that closes with the above weak rotational force rotates the latch It will not stop and the door will not be sealed.
The force of the spring increases as the door opens, and in a normal door closer, a force that increases as the door opens in addition to the above-mentioned strong sealing force is added, so the door feels heavy when opening the door. As described above, the rotation transmission device using the cam wheel and the cam body sliding surface can prevent the strong sealing force from being influenced when the door is opened.
The third challenge for achieving the “objective performance equal to or better than a door closer” is to ensure that the above-mentioned strong sealing force does not affect the opening of the door and only works when sealing the door. That is.

Even if the door of the present invention is closed at a low speed, the door always accelerates as long as a rotational force is applied to the door, and is accompanied by a strong impact when the door is closed. The third issue, “A device that allows only a strong sealing force to work when sealing the door” is not a device that closes the accelerated door while decelerating it. When the force acts, the rotation of the door further accelerates,
A fourth problem for strongly sealing the door without causing an impact is an apparatus for sealing the door while decelerating. By minimizing the rotation of the door associated with the operation of the sealing device as much as possible, that is, by operating the sealing device as instantaneously as possible, the acceleration of further door rotation can be minimized. it can.

The most difficult point of the present invention is that the cam body sliding surface applies a constant pressing force to the cam wheel, but even if the pressing force acting on the cam wheel is not constant, Since the cam wheel does not significantly affect the speed at which the cam wheel moves on the cam body sliding surface, rather than relying on the means for changing the shape of the cam body sliding surface as described above, the operation of sealing the door is not recommended. By adjusting the power of the door, the closing operation and the door sealing operation can be handled and adjusted separately, and the temporary stop state of the door can be inserted into the takeover between the door closing operation and the door sealing operation. I can do it. A fifth problem is a relay device that separates a spring engaged only in the door closing operation and a spring engaged only in the door sealing operation, and takes over from the door closing operation to the door sealing operation.

The door to which the door closer using the oil damper is attached has a function of stopping before the door closes even if it is hit by a strong wind, and the door of the present invention has the `` purpose of having the same or better performance as the door closer using the oil damper ''. In order to achieve this, it is necessary to have a function of stopping the door before it is closed even in a strong wind. This is the sixth issue.

By means of preventing the door from feeling heavy when opening the door, the rotational force acting on the door is "the minimum force necessary and sufficient to keep it from starting to close without staying stationary", Means for solving the first problem of ensuring that the position is always constant at any position where the door is opened is as follows:
“Along the cam body sliding surface provided on the cam body that is rotatably supported around the rotation axis of the cam body, the tip of the rotary body that is rotatably supported around the rotation axis of the rotary body In the rotation transmission device in which a cam wheel attached to a provided rotation support shaft moves and the cam body sliding surface presses the cam wheel to rotate the rotation body, the cam wheel, the rotation support shaft, The shape of the cam body sliding surface in which the line of action of the pressing force passing through is maintained at a constant distance from the rotating body rotation axis ".

In the “rotation transmission device in which the cam wheel presses the cam body sliding surface to rotate the cam body”, the concave cam body sliding surface described in FIGS. 1 to 5 uses the cam wheel as the rotating body rotation shaft. 6 and a rotation transmission device in which the convex cam body sliding surface described in FIG. 6 presses the cam wheel in a direction opposite to the direction toward the rotation axis of the rotation body. The shape of the surface is “a shape in which the line of action of the pressing force passing through the cam wheel and the rotation support shaft maintains a certain distance from the rotating body rotation shaft”.

"The shape of the sliding surface of the cam body in which the line of action of the pressing force passing through the cam wheel and the rotating support shaft maintains a constant distance from the rotating body rotating shaft" is a concave cam described in FIGS. As for the body sliding surface, as for the convex cam body sliding surface described in FIG.
“Tangential line Ti (i = 0, 1, 2,...) Passing through points bi (i = 0, 1, 2,. ) Is in contact with the contact ai (i = 0, 1, 2,...) Of the virtual circle Ra centered on the rotating body rotation axis O.
Cam the previous arc so that the previous arc passing through the point bi-1 and centering on the contact ai-1 intersects the start point bi of the next arc passing through the point bi and centering on the contact ai. Rotating and moving around the body rotation axis Q, the previous arc is continued to the next arc, and the previous arc is continuously drawn at the start point bi-1 of the previous arc that has been moved. The shape of the sliding surface of the cam body ”.

Means for solving the first problem that the rotational force acting on the door is always constant at any position where the door is opened is that the cam body sliding surface described in FIGS. There are a type that presses the wheel to rotate the rotating body and a type that the cam wheel described in FIGS. 7 and 8 presses the cam body sliding surface to rotate the cam body.
“When the cam wheel presses the cam body sliding surface and rotates the cam body, the action line of the pressing force acting between the cam wheel and the cam body sliding surface keeps a certain distance from the rotating body rotating shaft. "The shape of the sliding surface of the cam body" is an involute vortex as described in FIG. When a pressing force is applied to the cam body sliding surface whose shape is an involute vortex line, the cam body rotates with a constant rotational force regardless of the movement trajectory of the cam body. This is a rotation transmission device in which the cam wheel applies a pressing force to the sliding surface of the cam body and rotates the cam body with a constant rotational force, and a movement that applies a constant pressing force to the cam wheel with the rotational force of the cam body Device ".

7 and 8, when a pressing force is applied to the cam body sliding surface whose shape is an involute vortex line, the cam body rotates with a constant rotational force regardless of the movement trajectory of the cam body. In the rotation transmission device in which the cam body sliding surface presses the cam wheel to rotate the rotating body, the rotational force acting on the cam body is related to the moving track of the cam body, and will be described with reference to FIGS. “A rotation transmission device using a cam wheel and a cam body in which the distance between the cam body rotation shaft and the rotation body rotation shaft changes” or “the rotation support shaft of the cam wheel and the rotation body rotation shaft” The rotation transmission device by the cam wheel and the cam body in which the distance between them can change the rotational force for rotating the rotating body, and means for solving the second problem of “adjusting the rotational force acting on the door” It is.
This means that the door that has stopped is adjusted to start again, and the door closing speed is adjusted to the minimum speed of stopping or not stopping by eliminating the state of insufficient force to rotate the door, The cam body sliding surface is adjusted by changing the direction of the pressing force acting on the cam wheel. Since a resistance or other force is not applied in the opposite direction to the direction of the closing force as in a normal door closer, the force when opening the door is reduced accordingly. Further, since it is not a speed reduction device based on frictional resistance, there is no wear and the performance is not degraded and is stable.

As described in FIGS. 15 to 18, the third problem “means that the above-mentioned strong sealing force does not affect the opening of the door and only works when closing the door”
“When a portion of the cam body sliding surface close to the cam body rotation shaft is a straight line or a convex surface, and the cam wheel is in a portion close to the cam body rotation shaft, it passes through the cam wheel and the rotation support shaft. `` Rotation transmission device with cam body sliding surface whose action line of pressing force greatly changes the distance from the rotating shaft of the rotating body '', which does not affect when opening the door `` Cam body sliding surface presses the cam wheel "Strong power" will exert its power greatly just before the door closes.

A device for sealing the door of the fourth problem while decelerating, as illustrated in FIGS.
“Rotating body that is rotatably supported around the rotating body rotating shaft along a concave or convex cam body sliding surface provided on the cam body that is rotatably supported around the rotating shaft of the cam body A rotation transmission device in which a cam wheel attached to a rotation support shaft provided at a tip of the movement moves and the cam body sliding surface presses the cam wheel to rotate the rotation body. This is a rotation transmission device having a cam body sliding surface in which the line of action of the pressing force passing through the rotation spindle passes through the concave or convex focal point, and this device is a “concave or convex surface immediately before the door is closed. The action line of the pressing force passing through the focal point of the door always passes through or approaches the rotating shaft of the rotating body, so that the rotation of the door is stopped or decelerated.
FIG. 19 shows an arc cam body sliding surface as an example of a concave cam body sliding surface, and a cam body sliding surface bent at a right angle as an example of a convex cam body sliding surface. Examples are shown in FIGS.

As illustrated in FIG. 19, this device is adjusted so as to start moving by “a rotation transmission device in which the distance between the cam body rotation shaft and the rotation body rotation shaft changes”, and the door of the fourth problem is adjusted. Solve the problem of sealing while slowing down. In order to operate this apparatus without rotation of the door, as described in FIGS. 20 and 21, it is assumed that “the rotation transmission apparatus in which the cam body rotation shaft rotates” is used.

For example, as described with reference to FIGS. 22 and 23, “a rotation transmission device including a rotation transmission device engaged only in the door closing operation and a rotation transmission device engaged only in the door sealing operation” is described. “Sliding surface engaged only in the door sealing operation” on the “surface” and having the simplest structure in which one cam body sliding surface is continuously formed, and “door closing operation” as illustrated in FIGS. `` Sliding surface engaged only in the door '' and `` Sliding surface engaged only in the door sealing operation '' are separated, and the door sealing operation can be taken over after the door closing operation. The door sealing operation can be handled and adjusted separately, and the door can be rotated with the weakest force and sealed with the weakest force. Further, in the takeover between the door closing operation and the door sealing operation, a temporary stop state of the door can be inserted by performing a work other than the work of rotating the door.
The embodiment of FIGS. 24 and 25 is “a cam body sliding surface in which the line of action of the pressing force passing through the cam wheel and the rotation support shaft keeps a certain distance from the rotating body rotation shaft, and a circle along the cam body sliding surface. A cam wheel that moves, a cam body sliding surface in which a line of action of a pressing force passing through the cam wheel and the rotation support shaft passes through the concave surface or the focal point of the convex surface, and a cam wheel that circularly moves along the cam body sliding surface With
When the cam wheel comes into contact with the cam body sliding surface in which the action line of the pressing force passing through the cam wheel and the rotation support shaft passes through the concave surface or the focal point of the convex surface, the cam wheel and the rotation support shaft A rotation transmission device in which the cam wheel does not come into contact with the cam body sliding surface in which the line of action of the pressing force passing through a constant distance from the rotating body rotating shaft is maintained,
26 and 27 show that a cam body sliding surface and a cam which moves circularly along the concave surface or the convex focal point so that the line of action of the pressing force passing through the cam wheel and the rotation support shaft passes through the focal point of the concave surface or convex surface. With wheels,
The rotation transmission device has the cam body sliding surface that rotates when the cam wheel contacts and does not rotate when the cam wheel does not contact.

The fifth issue is the spring mechanism that separates the "spring only engaged in the door closing operation" and the "spring only engaged in the door closing operation" and "handing over from the door closing operation to the door sealing operation". Will be described with reference to FIG. 28, and “a spring that is engaged only in the door sealing operation” will be described with reference to FIGS. The “spring that is only engaged in the door sealing operation” described in FIG. 28 is provided on the rotating body fixed to the rotating shaft attached to the plate attached to the door frame, and the end of the rotating body opposite to the rotating shaft. A rotation support shaft, a link and a spring connected by an intermediate connection shaft, a contact contacting one side of the link, and a fixed support shaft attached to the plate,
When the connecting shaft on the opposite side of the connecting shaft of the link is rotatably supported by the rotating support shaft, the distance between the connecting shafts at both ends of the link is between the rotating support shaft and the rotating shaft. The distance is set, and the contact is attached to the rotating body,
Alternatively, when the connecting shaft on the opposite side of the connecting shaft of the link is rotatably supported by the fixed support shaft, the distance between the connecting shafts at both ends of the link is between the fixed support shaft and the rotating shaft. And attach the hit to the plate,
Until the middle of the rotation of the rotating body, the rotation of the link is stopped by the contact, and the spring is not expanded and contracted by keeping the connecting shaft at the position of the rotating shaft, and the rotation of the rotating body is stopped. Is a spring that acts on the rotating body from the middle of rotation so that the link is separated from the link and the connecting shaft is separated from the position of the rotating shaft so that the spring expands and contracts.

29-33, “a spring that is only engaged in the sealing operation of the door” means that “the wheel is attached to the link, and after the link moves away from the hit, the wheel moves along the sliding surface attached to the plate. By doing so, the connection shaft is kept at the position of the rotation shaft so that the spring does not expand and contract,
Alternatively, a sliding surface is attached to the link, and after the link moves away from the contact, the sliding surface moves along a wheel attached to the plate so that the connecting shaft is held at the position of the rotating shaft. So that the spring does not expand and contract,
The rotating body further rotates, the contact with the sliding surface is separated, the spring is extended and retracted so that the connecting shaft is separated from the position of the rotating shaft, and the rotating body acts on the rotating body during the rotation. Is.

The above-mentioned rotation mechanism based on the “spring only engaged in the door sealing operation” and the “spring only engaged in the door closing operation” alone has a function of tightly sealing after closing the door at a low speed. The function of decelerating the door may be lost due to the nature of the spring contracting momentarily when the load on the expansion and contraction of the spring is no longer applied, such as when the rotation of the rotating body of the device is large relative to the rotation of the device. I can't expect it. On the other hand, the “rotation transmission mechanism by the cam body and the cam body sliding surface” has a limit in the function of strongly sealing, and it is also rotated by this spring mechanism, which complements the functions of the spring mechanism. is there.
It must have a function to stop the door before it closes even in strong winds. This is the sixth issue

"A function to stop the door before it closes even in strong winds" means to solve the sixth problem,
“The connecting shaft provided at the opposite end of the rotating body fixed to the rotating shaft to be driven and the connecting shaft of the door are connected by two links, and until the door is closed from the fully open state to just before closing. The two links are kept in a straight line, and immediately before the door is closed, the rotating body and the link connected thereto are brought into contact with each other on the side surface, and are integrated.
The connecting point PP between the two links A and AA is located within a region that does not include the rotation axis O of the door D, with a straight line Z connecting the rotation axis Q of the rotating body J and the connection axis C as a boundary. The door has a door connecting portion that moves in the opening direction by the rotation of the rotating body so that it does not move even if force is applied to the door. Is temporarily stopped before the door is closed by rotating by the "decelerating and rotating drive unit" of the present invention described above. However, when the door is simply moved by a spring, after the door is rotated in the opening direction, the spring Is in a no-load state, and the spring contracts in a moment and before the door closes, it does not stop once. In the case of a drive unit consisting of a cam body and a cam wheel, the door will rotate slowly in order to rotate in the opening direction, and it will drive even if it is temporarily stopped without having to rotate the door. Since the part does not go into a no-load state, the spring is contracted in an instant and the drive part does not finish rotating in an instant.

Normally, a product called a door closer uses a single spring to handle the rotation and closing process of closing the door, and when the door is opened and the spring is stretched, the spring force begins with a strong force that seals the door. It will become stronger and will store more power than it can be when it is released. This is one of the factors that make the door feel heavier when opening the door, and even though we feel the door with the door closer attached, we are used to it and feel inconvenient. It is not like that. It is also a cause of a sudden rotation and a violent impact sound colliding with the door stop, and also a cause of an accident where a finger or the like is caught in the door. A normal door closer is simply a function that can be closed without permission, and the result is that the door that rotates without resistance is bothered to make it difficult to turn.

In the door of the present invention, the spring that gives rotation to the door is attached at a position close to the rotation axis of the door, and the spring force is weakened to the minimum necessary so that the spring can be closed without fail, When the door is opened and closed, the spring is not attached to the door.
In the present invention, the direction of the force acting on the door is shifted from the tangential direction of the door rotation to the radial direction so that the maximum value of the spring force is applied when the door is fully closed and the minimum value is applied when the door is fully opened. In addition, the amount of expansion and contraction of the spring is reduced relative to the amount of rotation of the door so that no force is applied to open and close the door.

A door closer attached to the outer wall like a front door can support a door closer that has a strong frame that attaches the door closer and operates with a strong spring, but if it is installed indoors, the attachment part seems to be wooden. In addition, since the strength of the frame is weak and the frequency of use is high, the frame of the mounting portion is broken or the mounting bolts are pulled out. Since it does not operate with the strong spring of the present invention, the reaction force received by the door during rotation of the door is small, and it can be attached to a weak frame. In all the embodiments shown in the drawings of the present application, the closing device of the present application is attached to the outer surface of the door which does not face the door frame, and the device does not enter the area sandwiched between the door and the door frame. Does not get in the way.

The rotation transmission device using the cam body and the cam wheel according to the present invention converts a constant pressing force into a constant rotational force, and converts the constant rotational force into a constant pressing force when used in reverse. The rotation transmission device in FIGS. 1 to 7 is also a means for rotating a heavy object on which a constant gravity acts, and the rotation transmission device in FIG. 8 is also a means for moving up and down. This is to keep the upper limit of the required force low by applying a force uniformly with a constant force from the beginning to the end, and is an effective means for moving heavy objects with a small force, such as a manual or small output motor. It becomes.

In the transmission mechanism in which the drive unit and the driven unit are connected by two links, the drive unit does not rely on a spring. For example, an electric motor has an effect of opening, stopping, or decelerating before closing. Moreover, even if the movement of the driven portion stops, the movement of the driving portion does not stop. Therefore, according to the electric motor, the pressing force for sealing the door after closing can be gradually increased.

Usually, the combination of the cam body and the cam wheel changes the rotation of the cam body into a linear reciprocating motion of the cam wheel. The present invention changes the rotation of the cam body into a circular motion of the cam wheel. Alternatively, when the sliding surface of the cam body moves along the cam wheel, which changes the circular motion of the cam wheel to rotation of the cam body, a pressing force acts on the contact point between the cam body and the cam wheel, A distance is created between the action line and the cam body rotation axis, and a rotational force acts around the cam body rotation axis.
The shape of the sliding surface of the cam body of the present invention is such that the distance between the line of action of the pressing force and the cam body rotating shaft is constant, and a constant pressing force is applied to the contact point between the cam body and the cam wheel. When applied, a constant rotational force acts around the cam body rotation axis.
All the force action lines shown in the drawings of the present application represent the direction of the force action line, and the length of the force action line shown does not represent the magnitude of the force.

As illustrated in FIGS. 1 to 8, the door drive unit according to the present invention has a cam wheel B that moves circularly about the rotating body rotation axis along a cam body sliding surface K on which the cam wheel B rotates about the cam body rotating axis. By moving, rotation of the rotating body A or the cam body KK is generated. As shown in FIGS. 1 to 6, there are a case where the rotating body A presses the wheel by the rotation of the cam body KK and a case where the rotating body A rotates as shown in FIGS. 7 and 8. .

The door of the present invention does not remain wherever it is released, but a force that starts to move in the direction of bare closing works, and the door that rotates at the minimum speed rotates with the minimum force. In any position, it prevents the force more than the force to start moving barely. That is, the same rotational force is applied to the door at any position.

The door of the present invention accumulates the closing force on the spring by opening, so that when the hand is released from the door, it always starts to close instead of stopping at any position. Designed so that the opening force is constant at any position when the door is opened and no excessive force is required by applying the minimum force necessary for the door to start closing without stopping. Yes. A door that closes with such a force that can barely remain stopped not only requires a strong force when opening the door, but also the speed at which the door closes is less likely to accelerate, and there is less impact when the door is closed.

1 to 8 provide the shape of the cam body sliding surface K in which the same rotational force acts on the rotating body at any position, and at any contact b between the wheel B and the cam body sliding surface K, The action line Fb of the pressing force acting on the wheel B is kept at a certain distance from the rotation center O of the rotating body A. That is, at an arbitrary contact point b between the wheel B and the cam body sliding surface K, the perpendicular T perpendicular to the cam body sliding surface K is set to be a tangent to the common virtual circle R.

FIG. 1 shows an embodiment of the present invention, in which a sliding surface K of a cam body KK that rotates about a rotation axis Q is a wheel B that is attached to a rotation support shaft Ib at the tip of an arm A that rotates about a rotation axis O. And the cam wheel B rolls along the cam body sliding surface K to rotate the arm A, and an example of the door drive unit of the present invention will be described.
The tension spring V has one end connected to the connecting shaft Sk of the cam body KK, the other end fixed to the connecting shaft Sw, and is extended and contracted along a circumferential guide rail Ks centered on the rotating shaft Q. The rotation of the body is proportional to the change in the length of the tension spring V. The action line Fv of the tension force of the tension spring V is a tangent to the circumference Qs, and keeps a constant distance from the rotation axis Q. Accordingly, the rotation of the cam body is proportional to the rotational moment Mk acting on the cam body.

When the cam body KK rotates in the direction of arrow A in the figure, the cam wheel B revolves around the rotation axis O in the direction of arrow B in the figure, and pushes through the contact b between the cam wheel B and the cam body sliding surface K. The distance Lb between the pressure action line Fb and the rotation axis Q decreases. Since the rotational moment Mk acting on the cam body and the distance Lb both increase in proportion to the rotation of the cam body, and the rotational moment Mk acting on the cam body is the product of the pressing force Fb and the distance Lb, the pressing force Fb is Regardless of the position of the cam wheel on the cam body sliding surface K, it is substantially constant. 1A shows a state in which the door is fully opened, FIG. 1C shows a state in which the door is closed, and FIG. 1B shows a state in the middle thereof.

As the door closes from the fully open state, the length of the pulling spring decreases, the spring force weakens, and the rotational moment Mk acting on the cam body KK decreases. The force for pressing the cam wheel B is made constant.
FIG. 2 defines the shape of the sliding surface K of the cam body KK that gives a constant rotational moment to the arm A, assuming that a constant pressing force acts on the cam wheel B.

In FIG. 2A, the cam wheel B is pivotally supported on a support shaft Ib at the tip of an arm A that rotates about a rotation axis O. The point O is the center of the virtual circle Ra and the circle Rb, and the circle Rb is the locus of the point farthest from the point O of the cam wheel B that revolves around the point O while maintaining a certain distance. The points b0, b1, b2,... On the circle Rb correspond to the central angles Θ0, Θ1, Θ2,. The straight lines T0, T1, T2 are tangents that pass through the points b0, b1, b2,... And touch the virtual circle Ra, and the points a0, a1, a2,. The radii r0, r1, r2... Are the distances between the points a0 and b0, the points a1 and b1, the points a2 and b2,... And the circle Ra circle Rb is a concentric circle. r1, r2,... are all equal in length. The arcs R0, R1, R2,... Are part of circles having radii r0, r1, r2,. All the arcs have the same radius and approximate to the circle Rb centered on the point O as much as possible.

Here, a cam body (not shown) having arcs R0, R1, R2,. If the rotation axis O is revolved in the direction of the arrow → b in the figure, the arcs R0, R1, R2,... Intersect with the circle Rb at a slight angle, and・ Wheel B is moved greatly with a slight rotation.
The shape of the sliding surface in contact with the cam wheel B is infinitely close to the circle Rb and is an arc having the same length radii r0, r1, r2,... Thus, it can be assumed that any position is taken out to be congruent arcs R0, R1, R2,..., And the cam body sliding surface K shown in FIG.

The tangent lines T0, T1, T2,... Are the action lines of the force that the cam body sliding surfaces R0, R1, R2,... Press the cam wheels B0, B1, B2,. Therefore, the distance from the point O is constant. This means that if the force with which the cam body sliding surface R presses the cam wheel B is constant, the rotational moment acting on the arm A rotating about the rotation axis O is constant.
In FIG. 2A, the vortex line K2 is an arc R2, and the vortex line K1 is obtained by rotating the arcs R0 and R1 around the point Q and continuing to the arc R2. The continuous vortex K1K2 forms the cam body sliding surface K shown in FIG. When a cam body (not shown) rotating around the rotation axis Q presses the cam wheel B to rotate the rotating body A with the vortex K1K2 as a sliding surface, the cam wheel B moves along the cam body sliding surface K1K2. It moves and the same rotational force works regardless of the position of the cam wheel B.

FIG. 2B illustrates a drawing method of the vortex K1K2. When each of the arcs R0, R1, and R2 rotates around the point Q and moves to the arcs K0, K1, and K2, b0, b1, Each point of b2 also rotates about the point Q and moves to the points k0, k1, and k2, and the centers a0, a1, and a2 of the arcs R0, R1, and R2 rotate about the point Q and rotate to the points ako, ak1, and so on. Move to ak2. Points ak0, ak1, and ak2 are the centers of arcs K0, K1, and K2.
Next, the drawing method will be described.
An arc K2 that is continuous with the start point b3 of the arc R3 is an arc centered at a point ak2 at a distance r2 from the point b3 on a locus Ra2 that circularly moves around the point Q of the point a2. Similarly, an arc K1 that is continuous with the start point k2 of the arc K2 is an arc centered on a point ak1 that is at a distance r1 from the point k2 on a locus Ra1 that moves circularly about the point Q of the point a1. Similarly, the arc K0 is an arc centered on the point ak0.

The vortex lines K0K1K2... R7 indicated by dotted lines in FIG. 3A are the cam body sliding surfaces K shown in FIG. 1 drawn according to the drawing method of FIG.
When the cam body sliding surface K rotates around the Q in the direction of arrow A in the figure and the point k6 moves to the point b6, the intersection of the cam body sliding surface K and the circular motion locus Rb of the cam wheel B is From point b7 to point b6, the cam wheel B (not shown) also moves from the position of point b7 to the position of point b6. Next, when the point k5 reaches the position of the point b5, the intersection of the cam body sliding surface K and the locus Rb becomes the position b5, and the cam wheel B also moves to the position b5. Thus, when the point k0 reaches the position of the point b0, the cam wheel B moves to the position of b0.
The shape of the cam body sliding surface in which the line of action of the pressing force acting between the cam wheel and the cam body sliding surface is maintained at a constant distance from the rotating body rotation shaft is drawn in the following procedure.
The contact points bi (i = 0, 1, 2,...) Between the cam body sliding surface K and the cam wheel B are equally distributed on a circle Rb centered on the rotating body rotation axis O, and then the contact points bi. Draw a tangent line Ti (i = 0, 1, 2,...) That passes through the point a i (i = 0, 1, 2,...) On the virtual circle Ra centering on the rotating body rotation axis O. , A circular arc aic i passing through the contact bi and centering on the point ai is drawn.
The end point ci (i = 0, 1, 2,...) Of the arc aici is a circle Rqi + 1 (i = 0, 1, 2,...) Passing through the contact point bi + 1 and centering on the cam body rotation axis Q. ), The starting point bi + 1 of the next arc bi + 1ci + 1 and the intersection ci are on the circle Rqi + 1.
The next arc bi + 1ci + 1 is rotated around the cam body rotation axis Q, the start point bi + 1 of the next arc bi + 1ci + 1 is moved to the position of the end point ci of the previous arc bici, The shape of the cam body sliding surface is drawn by successively continuing the next arc b i + 1 c i + 1 to the arc b i c i.
The vortex lines K0K1K2... R7 indicated by dotted lines in FIG. 3 (a) are drawn opposite to the procedure described above, and are congruent with the shape of the sliding surface of the cam body drawn by the procedure described above. It is. The previous arc bici is rotated around the cam body rotation axis Q, the end point ci of the previous arc bici is moved to the position of the start point bi of the next arc b i + 1 c i + 1, and the next arc b i + 1 c i is moved. The shape K0K1K2... R7 of the cam body sliding surface is drawn with the previous arc bici successively continuing to +1.

FIG. 3B shows that when the cam wheel B is located at each point b0, b1, b2,... B7, the crossing angle between the cam wheel moving direction indicated by the dotted line and the cam body sliding surface is always constant. This indicates that the cam body sliding surface is formed by an arc having the same radius. The right triangles a0b0O, a1b1O, o2B2O... A7b7O are all congruent. For example, when the right triangle a5b5O shown in FIG.
Each point k0, k1, k2,..., B7 on the sliding surface of the cam body is centered on Q with respect to each right triangle aibiO (i = 0, 1, 2, 3,...) Shown in FIG. This is the position when the arcs R0, R1, R2,. The sliding surface shown in FIG. 2 allows a constant rotational force to act around the rotation axis O when the pressing force acting on the cam wheel is constant.

As the door that works with the spring opens, the spring force changes, and the direction of the force changes because the fulcrum of the spring moves through the space. As a result, the magnitude of the rotational force acting on the door also changes.
Also in the case of FIG. 3, as shown in FIG. 3 (b), the distances Qq0, Qq1, Qq2,... In order to make the pressing force acting on B constant, the magnitude of the moment acting around the point Q must also change in accordance with the change in the distance between the force action line and the rotation axis Q. As assumed in FIG. 2 and FIG. 3, it may be impossible in design to make the pressing force acting on the wheel constant.

The cam body sliding surface shown in FIGS. 1 to 3 has a shape in which the distance between the action line of the pressing force acting on the cam wheel B and the rotation center O is always constant, and the pressing force acting on the cam wheel B is constant. It is assumed that the moment around the rotation center O is kept constant.
In FIG. 4, in order to keep the moment around the rotation center O constant, the shape is changed corresponding to “a pressing force acting on the cam wheel B which is not constant”. FIG. 4A shows a case where the pressing force Fb becomes weaker as it is opened. By gradually increasing the distance between the action lines Fb0, Fb1, Fb2,. The rotation moment around the rotation axis O is kept constant.
FIG. 4B shows a case where the pressing force Fb increases as the pressing force Fb is opened. By gradually decreasing the distance between the action lines Fb0, Fb1, Fb2,. The rotational moment around the rotation axis O is kept constant.

4 (a) and FIG. 4 (b), unlike the case of FIG. 3 (b), a right triangle Oaibi (i = 0, 1, 2,...) With the center of rotation O as the apex and the force action line as the base. ) Are different in height and shape. When the force Fb that presses the wheel changes, the vortex K of the cam body sliding surface that exerts a constant rotational moment around the rotation center O is applied to the wheel B at each point on the circular track Rb of the wheel B. The distance between the line of action of each force and the center of rotation is determined, and tangents Fb0, Fb1, Fb2,... Tangent to virtual circles Ro0, Ro1, Ro2,. , And arcs R0, R1, R2... Are determined, and these are rotated and moved around the rotation center Q to be continuous.
In FIG. 4, the vortex line KA is the vortex line KA shown in FIG. 3, and the vortex line Kb decreases as the pressing force Fb opens when the pressing force Fb works constant. The rate at which the curvature changes as Q approaches. The vortex Kc increases as the pressing force Fb is opened, and the rate at which the curvature changes as the rotation axis Q is approached is smaller than the vortex KA.

Next, the spring force Fv that keeps the pressing force Fb constant will be described.
In FIG. 1, when the radius of the circumference of the guide Ks is rk, from the balance of moments around the rotation axis Q,
Fv = (Fb / rk) Lb (Formula 1)
Here, since (Fb / rk) is constant, FV is proportional to Lb. The change in Lb is a change in the distance between the point Q and each of the points q0, q1, q2,... In FIG. Corresponding to the change in spring length when one fulcrum of spring V is fixed to Q and one fulcrum is moved along the curve indicated by the dotted line passing through each point q0, q1, q2. ing.

5 (a) assumes that the curve q0q1q2... Shown by the dotted line in FIG. 3 (b) is a circumference centered on the point Qq, and the cam body shown in FIG. The center Qq of the circle is made to coincide with the rotation axis Q of KK.
In FIG. 5, if one fulcrum of the spring V is a fixed point Sw and the other fulcrum Sk is attached to the cam body KK, in FIG. 5A, when the cam body KK rotates around the rotation axis Q, The fulcrum also revolves around the rotation axis Q, and the position is sequentially moved to the positions q0, q1, q2,... Q7, and the change in the length of the spring V is the action line of the pressing force shown in FIG. This corresponds to a change in the distance to the rotation axis Q. In the case of FIG. 5 (a), the line of action of the spring force acting on the cam body KK is the axis line of the spring, the distance from the rotation axis Q changes, and the condition that the assumed rk in Equation 1 is constant is satisfied. Absent.

FIG. 5B shows the spring V wound around a circumferential guide Ks centered on the rotation axis. The cam body KK rotates about the rotation axis Q and starts from the state KK0 indicated by a dotted line. It moves to the state of KK90 indicated by the solid line, and the position of the fulcrum Sk of the spring also moves from the position of Sk0 to the position of Sk90. When the fulcrum Sk of the spring sequentially moves to the positions q0 and q1, and then sequentially moves to the position q2q3, the spring V changes its length while being wound along the guide Ks. At this time, the distance rk between the line of action of the spring force and the rotation axis Q ”is constant and satisfies the assumption of Equation 1.
In FIG. 5A, the position of the spring fulcrum Sk is sequentially moved to the position q2q3..., And the change of the spring length at that time is shown in FIG. If it moves to the position of q3 and coincides with the change in length when the length of the spring V changes while winding around the guide Ks, the spring mechanism shown in FIG. The pressing force acting on the cam wheel shown will be constant.
However, since the tension of the spring is proportional to the amount of expansion and contraction of the spring, not to the change in the total length of the spring, as shown in FIG. Only the extended position Sw is moved. In FIG. 5B, the portion of the spring shown from the position Sw to the position q3 shows the amount of expansion and contraction proportional to the tensile force of the spring.

As shown in Formula 1, the drive unit having the structure shown in FIG. 1 has a weaker spring force as the wheel B approaches the rotation axis Q, that is, as Lb becomes smaller. However, the change in Lb is not proportional to the rotation of the cam body. As shown in FIGS. 3B and 4, the curve q0q1q2... Is a curve that gradually increases in curvature and approaches a straight line. The change in the distance between Q and the moving point q is a change in the length of the chord that moves away from the center of the circle when the point q moves on the circumference, and when the point q gradually moves on the straight line. It is a change. When the point q moves on a straight line, the rotation of the cam body and the force of the spring are more proportional, but the structure of the spring shown in FIG. Is established, and the strength of the spring becomes larger than necessary as the cam body is greatly rotated.
FIG. 5C improves this, and the rotational moment around the rotation axis Q acting on the cam body is adjusted by changing the shape of the guide Ks shown in FIG. 5B from the arc Ks to the vortex Kss. Yes. That is, as the cam body KK rotates, the change in the distance between the spring and the rotating shaft is related.

6 and 7 show an embodiment of another mechanism for transmitting rotation by moving the cam wheel along the cam sliding surface. FIG. 6 shows a cam body rotating around the rotation axis Q. The sliding surface K applies a constant pressing force to the cam wheel B, thereby giving the rotating body A a constant rotational force around the rotation axis O.
FIG. 6B, FIG. 7B, and FIG. 8B show the cam body sliding surface shape in each case according to the drawing method described in FIG. 2, and in all cases FIG. As in the case of, the straight line T perpendicular to the tangent line of the cam body sliding surface at the intersection b between the track of the cam wheel B and the cam body sliding surface is in contact with the virtual circle Ra centered at the point O at the contact point a. ing. A straight line T perpendicular to the cam body sliding surface is an action line of a force acting on the cam wheel or a force acting on the cam wheel, and keeps a distance from the rotation axis O constant. Therefore, the rotational moment around the rotation axis O is always constant.
Considering the cam body sliding surface finely divided and the cam body sliding surface as an aggregate of the divided differential elements,
The differential element of the sliding surface of the cam body passing through the intersection point b approximates an arc Ri (i = 0, 1, 2,...) Centered on the “contact point a between the perpendicular T and the virtual circle Ra” and having a radius ab. doing.

In FIG. 6B, the intersection of a circle Rqi (i = 0, 1, 2,...) That passes through a point bi (i = 0, 1, 2,. ci (i = 0, 1, 2,...), and similarly, in FIG. 7 (b) and FIG. 8 (b), it passes through the point bi (i = 0, 1, 2,. Let the intersection of the circle Roi (i = 0, 1, 2,...) And the arc Ri be ci (i = 0, 1, 2,...)
The figure aibici (i = 0, 1, 2,...) Composed of the arc Ri and the tangent line Ti is centered on the point Q in FIG. 6B and the point O in FIG. 7B and FIG. 8B. 6, and is continuous to R 5 in FIG. 6B and Ro in FIG. 7B and FIG. 8C, each Rii (i = 0, 1, 2,... ) Rotates to Kii (i = 0, 1, 2,...), And the cam body sliding surface is drawn.

In the embodiment illustrated in FIGS. 1 to 6, the cam body KK presses the cam wheel by the rotation of the cam body KK, and the rotating body A rotates. In the embodiment shown in FIGS. 7 and 8, the cam body KK is rotated by the circular motion of the rotating body A. FIG. In contrast to the embodiment illustrated in FIGS. 1 to 6, FIG. 7 and FIG. 8 show that the cam wheel B applies a constant pressing force to the cam body sliding surface K to rotate the cam body KK around the rotation axis O. It makes the force constant.
1 to 6, a straight line T perpendicular to the tangent to the cam body sliding surface is in contact with a virtual circle centering on the rotation axis of the rotating body A of the counterpart to which the cam body rotates. . Accordingly, the shape of the sliding surface of the cam body shown in FIGS.
On the other hand, in the cam body sliding surface of FIGS. 7 and 8, a straight line T perpendicular to the tangent line of the cam body sliding surface is in contact with a virtual circle centered on its own rotation axis. Therefore, the shape of the sliding surface of the cam body in FIGS. The shape of the cam body sliding surface of FIG. 7 and FIG.

1 to 6, the center of the circular orbit along which the cam wheel moves is the same as the center of the virtual circle where the perpendicular line T contacts the contact point b between the cam wheel and the cam body sliding surface. Move with a certain distance from the center. Since the circular trajectory along which the cam wheel moves and the virtual circle are concentric circles, the differential elements of the cam body sliding surface defined by the concentric circles are all congruent as shown in FIGS. 3 (b) and 6 (b).
On the other hand, the center of the circular orbit along which the cam wheel moves is not the center of the virtual circle that is in contact with the perpendicular T standing on the sliding surface of the cam body, but the cam wheel moves by changing the distance from the center of the virtual circle. . As shown in FIG. 7B and FIG. 8B, the radius of the arc of the differential element of the cam body sliding surface increases as the contact point b between the cam wheel and the cam body sliding surface increases away from the center of the virtual circle. . The radius of the arc of the differential element on the sliding surface of the cam body increases as the contact point b between the cam wheel and the sliding surface of the cam body moves away from the center of the virtual circle, but the arc of the minute element gradually approaches the same. The shape of the sliding surface of the cam body 8 approaches a circle as it moves away from the rotation axis of the cam body.
In the case of FIG. 7 and FIG. 8, the cam body rotates greatly with respect to the movement of the cam wheel at a location near the circle of the cam body sliding surface away from the rotation axis of the cam body. While the speed ratio between the body and the rotating body is almost constant, in the case of FIG. 7 and FIG. 8, the speed ratio changes greatly as the distance from the rotating shaft of the cam body increases.

3B, FIG. 6B, and FIG. 7B and FIG. 8B, the arc Ri (i = 0, 1, 2,...) Of the differential element on the sliding surface of the cam body is a virtual circle. The angle intersecting with the concentric circle represents the gradient of the cam body sliding surface with respect to the moving direction of the cam wheel on the cam body sliding surface, but is constant in FIGS. 3 (b) and 6 (b). (B) In FIG. 8B, the gradient decreases as the distance from the rotation axis of the cam body increases.
This means that in the case of FIG. 7 and FIG. 8, the wheel becomes harder to move as it moves away from the rotation axis of the cam body, and also includes the meaning that the speed ratio changes greatly as it moves away from the rotation axis of the cam body. This means that the cam body rotates faster as the cam wheel approaches the rotational axis of the cam body.

In FIG. 7, the cam wheel B revolves around the rotation axis Q. In FIG. 8, the cam wheel B simply moves up and down linearly, which corresponds to the case where the rotation radius in FIG. 7 is infinite. The shape of the sliding surface of the cam body in FIG. 7 is determined by the size of the virtual circle centered on its own rotation axis regardless of the position of the rotation axis Q of the cam wheel B. Whether revolving around the rotation axis Q or linearly moving up and down in FIG. 8, the shape of the cam body sliding surface is determined by the size of the virtual circle centered on its own rotation axis.
In both the case of FIG. 7 and the case of FIG. 8, the shape of the sliding surface of the cam body matches if the size of the virtual circle is set to the same size.

8 also serves as means for moving the cam wheel B up and down by a constant rotational force of the cam body. Similarly, in the case of FIG. 3, FIG. 6 and FIG. 7, the cam body is rotated by the constant rotational force of the cam wheel. Is also possible. A constant force is always applied between the cam body and the cam wheel.
Although FIG. 8 is a general means which uses a rotational motion for the up-and-down moving means, the object is moved up and down with a constant rotational force from the beginning to the end. If the cam body having the cam sliding surface defined in FIG. 8 is employed, it is possible to move the heavy object up and down with the weakest force by making the force acting from the beginning to the end uniform.

FIG. 8B shows the starting point bi (i = 0.1.2....) Of the arc bici (i = 0.1.2...) Shown in FIG. Are rotated and arranged on a straight line in the radial direction.
An intersection of a circle Ri (i = 0, 1, 2,...) Centered on the circle O and a trajectory along which the cam wheel moves is defined as a point bi (i = 0, 1, 2,...), And a straight line Ti ( When i = 0, 1, 2,... passes through the point bi (i = 0, 1, 2,...) and touches the virtual circle Ra at the contact point ai (i = 0, 1, 2,...). Assuming that the intersection of the arc having a radius around the point ai and a circle Ri-1 and the circle Ri-1 is ci (i = 0.1.2...), FIG. Also in b), the arc bici is the intersection of the circle Ri and the trajectory along which the cam wheel moves, regardless of the position bi on the circle Ri. The arc shown in FIG. 7B and the arc shown in FIG. 8B are congruent.

The figure aibici (i = 0.1.2 ...) is rotated around the point O, and the end point ci of the figure aibici is moved to the position of the start point bi-1 of the figure ai-1bi-1c-1i The circular arc bici is continued to the circular arc bi-1ci-1. In this way, the vortex lines b0k1k2k3... Are drawn by making the end point of the next arc continue to the start point of the immediately preceding arc.
Since the arcs bici defined by the point bi anywhere on the circle Ri are all congruent, the vortex lines b0k1k2k3... Drawn by rotating and continuing the arc bici are what the cam wheels move. Even so, it is decided to be one.
In FIG. 8B, the starting point bi of the arc bici is equally distributed on the straight line in the radial direction, but the length of the arc bici becomes longer as the distance from the point O increases, and a perpendicular line appears near the end point ci of the arc bici. Since it passes through the contact point ai on the virtual circle Ra but does not come into contact with the virtual circle Ra, in FIG. 8B, the length of the arc bici is made constant and the distance between the circle Ri and the circle Ri-1 is gradually reduced. As a result, more accurate vortex lines can be obtained.
Draw an arc kiki + 1 that touches the virtual circle Ra at a point ji and has a length jiki as the radius around the point ji, passes through the end point ki + 1 to the end point ki + 1, and goes to the virtual circle Ra. The length ji + 1 iki + 1 of the tangent line Ti + 1 tangent at the point ji + 1 is the radius, and the arc ki + 1 having the same length as the arc ki + 1 is connected sequentially. The more accurate the vortex line is obtained.

In FIG. 8B, for example, the radius of the arc K2 is j3k3, and is also j3k2. j3k2 is the sum of the lengths of the radius j2k2 and the arc j2j3. As described above, the length of the arc ki + 1 ki + 2 for all the arcs Ki is an increment when the radius length is changed from jiki to length ji + 1 iki + 1. Therefore, the vortex line of FIG. 8B drawn in this way is an involute vortex line.
As shown in FIG. 8 (a), when a perpendicular line standing at an arbitrary point on the sliding surface of the cam body touches one virtual circle, the vortex shape of the sliding surface of the cam body is an involute vortex line and ends from the beginning The vortex shape of the sliding surface of the cam body in FIG. 8 that moves the object up and down with a constant rotational force is an involute vortex line. The drawing method shown in FIG. 8B is simple in that no involute function is used. This involute vortex is determined regardless of cam wheel movement. In contrast, the vortex lines on the sliding surface of the cam body in FIGS. 1 to 6 are vortex lines that change depending on the movement trajectory of the cam wheel.
The vortex line on the sliding surface of the cam body in FIGS. 1 to 6 determines the shape of the vortex line if the virtual circle and the moving trajectory are determined. When the movement of the cam wheel is changed by changing the distance between them, the direction of the line of action of the pressing force acting on the cam wheel changes. The vortex lines shown in FIGS. 7 and 8 do not change the direction of the line of action of the pressing force acting on the cam wheel even if the movement of the cam wheel is changed. The involute vortex lines shown in FIGS. 7 and 8 are clearly different from the vortex lines of FIGS.

In FIG. 1 to FIG. 6, when it is considered that the cam body to which a constant load is applied by the rotation of the cam wheel rotating with a constant rotational force, means for moving a heavy object on the circumference instead of on a straight line it is conceivable that. The present invention opens and closes the door with the weakest force by uniformizing the force applied from the beginning to the end when the door is manually rotated, and acts from the beginning to the end when the heavy object is moved manually. By making the force uniform, the heavy object is moved with the weakest force.

In any position where the door is open, the force required for the stationary door to start moving is the same. The cam body sliding surface described above gives the door the same rotational force at any position where the door is opened.
Embodiment FIG. 3 In FIG. 6, the moving direction of the cam wheel circular movement, that is, in FIG. 3 and FIG. 6, the cam wheel moving Rb direction and the cam body sliding surface always intersect at the same angle. In FIG. 7, unlike FIG. 3 and FIG. 6, the movement of the cam wheel is not a circular motion that always keeps the same distance from the center of rotation, but the distance from the center of rotation changes. In order to give the same rotational force, the angle at which the cam wheel movement Rb direction intersects the cam body sliding surface changes.

Embodiment FIG. 3 FIG. 6 When the cam wheel moves toward the cam body rotation shaft, the carriage loaded with a certain weight moves in the opposite direction away from the downhill slope. This is a state of moving on an uphill slope. The wheel of the carriage is compared to the cam wheel B, and the constant weight acting on the slope is compared to the pressing force Fb acting on the cam wheel.
Embodiment FIG. 3 In the case of FIG. 6, the “cart loaded with a constant weight” that stops on a slope with a constant slope stops at any position, and the cart that starts moving starts to move at any position. When the cam body sliding surface K acts on the cam wheel with a constant pressing force Fb, the cam body stops at any position, and the carriage that starts moving starts to move at any position.
In the case of FIG. 7, the gravity acting on the “carriage loaded with a certain weight” becomes smaller at the top of the slope, stops at any position, and the slope of the slope is above the slope to start moving. The smaller it is.

The rotational force acting on the cam body is proportional to the magnitude of the pressing force Fb, and the larger the spring force, the easier the cam body will rotate, but the carriage moves by making the slope steep. By increasing the intersection angle between the moving direction of the cam wheel B and the sliding surface of the cam body so that it can move easily, the wheel B moves easily even if the spring strength is weak.
9 (a), 9 (b), and 9 (c) show different shapes of the cam body sliding surface when the crossing angle between the cam wheel moving direction and the cam body sliding surface is different with respect to FIGS. It is. Each of the different cam body sliding surfaces KX, KY, KZ corresponds to circles RX, RY, RZ having different radii around the rotation axis O.

Each of the cam body sliding surfaces KX, KY, KZ rotates about the rotation axis Q and crosses the circle Rb centered on the rotation axis O at the intersection point b, and passes through the arbitrary intersection point B at an arbitrary intersection point B. The perpendicular of the sliding surface of the cam body is in contact with the traffic circles RX, RY, RZ.
9 (a) and 9 (b), the cam body sliding surface K is a concentric arc regardless of where it is divided and is an aggregate of the same arc. In the figure, qX, qY, and qZ indicate movements of the arc centers of the differential elements of the cam body sliding surfaces KX, KY, and KZ.
In FIG. 9C, the arcs of the differential elements of the cam body sliding surface K are not congruent. The center of the arc of the differential element does not move on the rotation axis O.

Various cam body sliding surfaces with different angles of intersection are conceivable. For doors that are easy to rotate, a cam body sliding surface with a small angle of intersection is used to reduce the rotational speed of the door, and for doors that are difficult to rotate, the angle of intersection is large. It is only necessary to accelerate by adopting a cam body sliding surface, but there are doors that are easy to rotate and doors that are difficult to rotate, and it is not possible to prepare separate cam body sliding surfaces for each door .
As illustrated in FIGS. 10 to 14, by changing the “distance between the rotating body rotation axis Q and the cam rotation axis O” even on the cam body sliding surface that is constant at the same intersection angle, Can be changed. The “intersection angle between the cam wheel moving direction and the cam body sliding surface” is changed by changing the distance Rb between the “intersection b between the cam wheel moving direction and the cam body sliding surface” and the rotation center. I can do it.

In this way, a single cam body sliding surface can be prepared and dealt with for any door of the door that is easy to rotate and the door that is difficult to rotate.
“The slope of the cam body sliding surface necessary to start moving instead of staying stationary” varies depending on the door, and if the “intersection angle between the cam wheel moving direction and the cam body sliding surface” can be adjusted, it will rotate. Even cam bodies attached to easy-to-use doors can be diverted to doors that are difficult to rotate. Even when the same cam body is attached to the same door, the spring strength can be adjusted so as not to stop. In this way, it is possible to prepare one cam body sliding surface for any of the doors that are easy to rotate and those that are difficult to rotate so that the rotation speed of the door does not stop. I can do it.

The spring that stretches shrinks in an instant, and it is very difficult to adjust the rotation speed of the door that is moved by the spring so that it does not stop. If the force in the opposite direction is applied to decelerate, there is a variation in performance with friction resistance such as brakes, and it is difficult to finely adjust friction resistance such as brakes. It was impossible to adjust the door to move slowly, either by stopping or by moving quickly.

Decreasing the rotational speed of the door by applying a frictional resistance such as a brake and applying a force in the opposite direction to the force of the spring weakens the force of the spring. This is the same as weakening the spring force by changing the “intersection angle between the cam body and the sliding surface of the cam body”. The “intersection angle between the cam wheel moving direction and the cam body sliding surface” can be finely adjusted, the rotation speed of the door can be continuously changed, and the door can be adjusted to move slowly. Thus, by adjusting the rotation speed of the door without depending on the frictional resistance, the life of the apparatus can be extended without any wear, and a stable effect can be obtained without variation in performance.

10 to 15 show the “intersection angle between the cam wheel moving direction and the cam body sliding surface” when the “distance between the cam body rotating shaft and the rotating body rotating shaft with the cam wheel attached to the tip” is changed. The change in the direction in which the action line of the pressing force is directed will be described. FIGS. 13 to 15 relate to FIGS. 1 to 5, and FIGS. 13 and 14 relate to FIGS.
Further, “change in the angle of intersection between the cam wheel moving direction and the cam body sliding surface” when the distance Rb between the “intersection point b between the cam wheel moving direction and the cam body sliding surface” and the rotation center is changed. Will be described with reference to FIGS.

FIG. 10 (a) shows a state when the position of the rotation axis O is moved to a position Of whose distance is Lf at a position far from the rotation axis, and FIG. 10 (b) is a position On where the distance is Ln at a close position. The state moved to is shown. 10A and 10B, the position where the cam body sliding surface K and the cam wheel are in contact with each other moves, and the "intersection angle between the cam body sliding surface and the moving direction of the cam wheel" also changes.

FIG. 10A shows the case where the “distance between the cam body rotating shaft and the rotating body rotating shaft” is increased. From the state shown by the dotted line to the state shown by the solid line, the “intersection angle of the cam body sliding surface and the moving direction of the cam wheel” increases, and the cam wheel moves on the cam body sliding surface at an accelerated speed. Become. Further, since the rotation angle of the rotating body around the rotating body rotation axis O also increases, if the “distance between the cam body rotating shaft and the rotating body rotating shaft” is increased, the position close to the position where the door closes. The door rotation speed will be accelerated.

The change in the state indicated by the dotted line and the solid line in FIG. 10A is the “distance from the rotation axis O to the“ intersection between the cam body sliding surface and the cam wheel ”of the rotation body where the position of the rotation axis O is Of”. Is considered to be caused by the change from the state of Laf to the state of La, so that the “distance from the rotating shaft to the tip of the cam wheel” of the rotating body is reduced, and “the rotating body rotating shaft and the rotating body rotating shaft” The same effect as the case where the “distance between” and “the distance between” is increased is obtained. That is, when the “distance from the rotating shaft to the tip of the cam wheel” of the rotating body is reduced, the rotational speed of the door is accelerated at a position close to the position where the door is closed.

FIG. 10B shows that when the “distance between the cam body rotating shaft and the rotating body rotating shaft” is made closer, the state shown by the dotted line changes from the state shown by the solid line to the “cam body sliding surface and the cam wheel. The “intersection angle with the moving direction” becomes smaller, and the cam wheel moves while decelerating on the sliding surface of the cam body. In addition, since the rotation angle of the rotating body around the rotating body rotation axis O is also reduced, if the “distance between the cam body rotating shaft and the rotating body rotating shaft” is reduced, the position is far from the position where the door is closed. As a result, the rotation speed of the door decreases.

The change in the state indicated by the dotted line and the solid line in FIG. 10B is the “distance from the rotation axis O to the“ intersection of the cam body sliding surface and the cam wheel ”” of the rotation body where the position of the rotation axis O is On. Is considered to be due to the change from the state of Lan to the state of La. Therefore, the “distance from the rotating shaft to the tip of the cam wheel” of the rotating body is extended, and the “cam body rotating shaft and rotating body rotating shaft” The same effect as that obtained when the “distance between” and the “distance between” is reduced is obtained. That is, when the “distance from the rotating shaft to the tip of the cam wheel” of the rotating body is increased, the rotational speed of the door is reduced at a position far from the position where the door is closed.
In this way, the rotational speed of the door can be adjusted by changing the “distance from the rotating shaft to the tip of the cam wheel”.

In FIG. 10C, when the “contact point b between the cam wheel and the cam body sliding surface” moves on the circumference Rb centered on the circle O, the “pressing force Fb passing through the contact point b and the rotation axis Ib” A contact point a is in contact with a virtual circle Ra centering on the point O.
When the point where the cam wheel and the cam body sliding surface contact is a contact b, and the distance between the contact b and the rotating body rotation axis O is La, the distance is from the rotation axis Q to Lf shown in FIG. The rotation axis Of is located at the intersection of a circle Rf having a radius Lf centered on the point Q and a circle Rla having a radius La centered on the point b. Similarly, the rotation axis On shown in FIG. 10B is located at the intersection of the circle Rn and the circle Rla.

In FIG. 10C, the force action line Fb passing through the intersection point b is a tangent to the circle Ra centering on the rotation axis O, and the distance between the force action line Fb and the rotation center Of or On is the point af and the point a, respectively. When the pressing force Fb is constant at the distance between or of the point an and the point of, the rotational moment around the rotation axis O increases in the former case and decreases in the latter case.
When the rotating body and the cam body are moved away as shown in FIG. 10A, the “intersection angle between the cam body sliding surface K and the circular orbit Rbf of the cam wheel” increases, and the rotating body is easily turned. When the rotating body cam body is brought closer as shown in (b), the “intersection angle between the cam body sliding surface K and the circular orbit Rbf of the cam wheel” becomes small, and the rotating body is difficult to turn. If the cam body of the embodiment shown in FIGS. 1 to 5 stops when the door drive unit is used, the rotating body and the cam body can be moved away from each other, and the door moves too fast. In case you can approach and slow down.

FIG. 11A illustrates the change in the direction of the action line of the force when the cam body rotating shaft is separated from the rotating body rotating shaft, and FIG. 11B is the action of the force when approaching. This explains the change in the direction of the line.
In FIG. 11 (a), as described in FIG. 10 (c), the position of the rotation axis Of when the cam body rotation axis and the rotation axis of the rotation body are kept away is the distance Lf from the rotation axis Q. Therefore, it is at the intersection of a circle Rf having a radius Lf centered on the point Q and a circle Rla having a radius La centered on the point b. When the intersection b moves on the circular orbit Rb as b2, b3,..., B7, the position of the rotating body rotation axis Of is indicated by f2f3... F7 in FIG. Are indicated by af2f2, af3f3... Af7f7. In FIG. 11B, the position of the rotation axis Of is indicated by n0, n1, n2,... N7, and the distances to the action lines of the respective pressing forces are indicated by an0n0, an1n1, an2n2,.

12 (a) and 12 (b) show the change in the direction of the action line of force in the case of FIGS. 10 (a) and 10 (b), respectively, as in FIG. 11. In FIG. 12 (a), the rotation axis Of and FIG. In (b), when the cam wheel sequentially moves from b2 to b6 with the position of the rotation shaft On as a fixed point, the cam body sliding surface changes to K2, K3... K6, and the rotation body rotation shaft is also O2, O3. ... changes to O6. The tangent lines T2, T3,... T6 and the contacts af2, af3,. FIG. 12A shows a change in the distance between each tangent line T and the rotation axis Of.
FIG. 12B shows a change in distance between each tangent line T and the rotation axis On.

11 (a) and 12 (a), when the rotating shafts of the cam body and the rotating body are moved away from each other, the distance from the center of rotation to the line of action of the force generally increases, and a large rotating force acts. Is not constant and increases as the cam wheel approaches the cam body rotation axis Q. The rotating shafts of the cam body and the rotating body can be moved away from each other so that the stopped door starts to move, and the place where the door starts moving approaches the position where the door is fully opened.
When the door that stops with the rotating shafts of the cam body and the rotating body moving away from each other starts to move, the door does not stop halfway. In this case, since a large force works as the door closes, it accelerates as the door closes.

Further, as shown in FIGS. 11B and 12B, the door that closes quickly can be decelerated by bringing the rotating shafts of the cam body and the rotating body close to each other. When the rotating shafts of the cam body and the rotating body are brought closer to each other, the rotational force that acts as the door is closed becomes smaller, so it is easier to stop. The position where the door stops when the rotating shafts of the cam body and the rotating body are moved closer to each other is the closed position. The position is slightly opened. Opening the door a little and letting it go and letting the door move in a place where it stops will make it the door that never stops with the least force.

When the rotating shafts of the cam body and the rotating body are moved away from or close to each other, the distance between the line of force and the center of rotation is not large in the range from fully open to immediately before closing. However, in the range from just before the door is closed to the closing, the cam body and the rotating body are accelerated by moving the rotating shafts away from each other, and decelerated by bringing them closer. Become. In this way, the rotational speed of the door can be adjusted by adjusting the distance between the rotating shafts of the cam body and the rotating body in addition to adjusting the spring force of the drive unit.

FIGS. 13 (a) and 13 (b) respectively show the position of the rotating body rotating shaft when the distance between the rotating shafts of the cam body and the rotating body is increased in the embodiment shown in FIG. 6 and FIG. This relationship will be described.
As described with reference to FIG. 11 for the embodiment of FIGS. 1 to 5, even in the embodiment of FIG. 6 and FIG. 7, the perpendicular T standing at an arbitrary position on the sliding surface of the cam body touches the virtual circle Ra, The relationship between the position b and the virtual circle Ra is established irrespective of the position of the center of revolution of the cam wheel, that is, the position of the rotating shaft of the rotating body A.

Since the relationship between the position of the contact b on the sliding surface of the cam body and the virtual circle Ra is established regardless of the position of the rotating shaft of the cam wheel, the relationship between the position of the contact b and the virtual circle Ra is fixed in FIG. All cases where the distance between the rotating shaft of the cam body and the rotating body changes, or "the distance from the rotating body rotating shaft to the contact point between the cam wheel and the cam body sliding surface" Is illustrated as the position of the rotating shaft of the rotating body is moved.

In FIG. 13A, as shown in FIG. 10C, when the revolution center O is illustrated as a fixed point, the position Of of the rotating body rotation shaft is a distance Lf from the cam body rotation shaft, and from the position of the contact b. Since the position is at the distance La, the position of the rotating body rotation axis is the intersection of a circle Rf having a radius Lf centered on the cam body rotation axis Q and a circle Rla having a radius La centering on the contact b. As can be judged from FIG. 13 (a), in the embodiment of FIG. 6, when the contact point b is the same on the sliding surface of the cam body, the sliding surface of the cam body moves away from the rotation axis of the cam body and the rotating body. Since the direction of pushing the cam wheel approaches the state of matching the axis of the rotating body, it becomes difficult to move.

In the case of the embodiment of FIG. 6, the distance between the rotating shaft of the cam body and the rotating body does not change, and “the distance from the rotating body rotating shaft to the contact point between the cam wheel and the cam body sliding surface” changes. In FIG. 13A, since the distance between the rotating body rotating shaft and the cam body rotating shaft is constant, the position of the rotating body rotating shaft is on a circle Ro passing through the point O with the cam body rotating shaft Q as the center.
When the “distance from the rotating body rotation shaft to the contact point between the cam wheel and the cam body sliding surface” is L1 or L2, the position of the rotating body rotation shaft is the position of O1 and O2 on the circle Ro. As can be judged from FIG. 13A, in the embodiment of FIG. 6, when the contact b is the same on the cam body sliding surface, “the contact between the rotating wheel rotating shaft and the cam wheel and the cam body sliding surface”. When the "distance to" is shortened, the distance from the "action line T of the force that the cam body sliding surface pushes the cam wheel" is shortened, so that it becomes difficult to move. In addition, when the “distance from the rotating body rotating shaft to the contact point between the cam wheel and the cam body sliding surface” becomes longer, the distance from the “action line T of the force that the cam body sliding surface presses the cam wheel” becomes longer. It becomes easy to move.

In FIG. 13B relating to the embodiment of FIG. 7, the perpendicular T passing through the contact point b between the cam body sliding surface and the cam wheel B is in contact with the virtual circle Ra, and the perpendicular T direction passing through the contact point b is the rotating body. Since it is constant regardless of the position of the rotating shaft, the direction of the pressing force Fb acting on the cam body is constant regardless of the position of the rotating body rotating shaft.
The pressing force Fb acting on the cam body is constant, and the cam body KK rotates around the rotation axis Q with a constant rotational force. The distance between the action line Fb of the pressing force acting on the cam body and the rotation axis Q of the cam body KK is constant, but when the distance between the rotation axis of the cam body and the rotation body increases from La to Lf, the rotation of the rotation body The position of the axis O moves to the point Of on the circle Rla having the radius La with the contact b as the center, and the distance to the action line T of the pressing force Fb becomes small.
Since the pressing force Fb is constant, the rotational moment that imparts rotation to the cam body is reduced. As shown in FIG. 13B, the further away the rotation shafts of the cam body and the rotating body are, the smaller the gradient of the cam body sliding surface with respect to the moving direction of the cam wheel B is. Become.

In the case of the embodiment shown in FIG. 6 as well, the same adjustment as in the case of FIGS. 1 to 5 is possible, and in the case of the embodiment of FIG. 6, the case of FIGS. .
FIG. 14 shows changes in the direction of the action line Fb of the pressing force when the distance between the cam body and the rotating shaft of the rotating body changes in the embodiment shown in FIG. 6, and FIG. 14 (a) shows the cam body. 14 is a case where the rotation axis of the rotating body is moved away from the rotating shaft of FIG.
As shown in FIG. 14 (a), when the rotation axes of the cam body and the rotating body are moved away from each other, the distance between the rotation center and the action line of the force is generally reduced, and the rotating force acting as the door is closed is reduced. When they are close to each other, they generally increase as shown in FIG.

When the door shown in FIG. 6 rotates quickly, it moves away between the rotation shafts until the rotation stops. In this case, it moves fast in the range close to full opening, decelerates as it closes, and the position where the door stops stops moving from the position immediately before closing to a position close to full opening. In addition, when it stops and does not move, the rotating shafts are brought close to each other, but there is little change in the magnitude of the rotational force that works in the range from fully open to closed.

FIG. 15 relates to the embodiment of FIG. 7, and unlike the embodiment of FIGS. 1 to 6, it is not an example in which the cam body gives rotation to the rotating body, but the cam body is rotated. Rotational force by pressing force works around
In the cam body sliding surface, a perpendicular line standing at an arbitrary point on the cam body sliding surface varies depending on the distance from the cam body rotating shaft. Also, if the distance from the cam body rotation axis at any point on the cam body sliding surface is determined, the direction of the perpendicular line at that point is determined. In the cam body sliding surface of the embodiment of FIGS. 1 to 6, the direction of the perpendicular line standing at an arbitrary point on the cam body sliding surface is a tangent line of a virtual circle centering on the rotating body rotation axis, If the distance from the rotating body rotation axis is different, the distance is different.
In the case of FIGS. 7 and 8, since the direction of the perpendicular line set up at an arbitrary point on the sliding surface of the cam body is not a rotating body rotating shaft but a tangent line of a virtual circle centered on the own rotating body of the cam body, It is determined by determining the distance from the cam body rotation axis regardless of the distance between the rotation body rotation axis and the rotation body rotation axis. Therefore, in the case of FIGS. 7 and 8, even if the distance between the cam body rotating shaft and the rotating body rotating shaft is changed, the direction of the perpendicular line standing on the cam body sliding surface is not changed as in the embodiment of FIGS.
In the case of FIGS. 7 and 8, when the cam wheel contacts the place at an arbitrary point on the sliding surface of the cam body, the action line of the pressing force acting on the cam wheel is a perpendicular line standing on the sliding surface passing through the contact point. If the position of the cam wheel on the sliding surface is determined, the direction of the pressing force is determined regardless of the revolution trajectory of the cam wheel. The sliding surface K shown in FIGS. 7 and 8 is such that when a constant pressing force is applied to the cam body, the cam body rotates with a constant rotational force. It doesn't matter.

FIG. 15A illustrates a case where the rotating body rotation axis O is moved away from the cam body rotation axis Q by a distance Lf. As described with reference to FIG. 13B, the cam wheel is b0 on Rb. , B1, b2,... Are indicated by points f0, f1, f2,... On a circumference Rf having a radius Lf with the point O as the center.
The distance from each point f0, f1, f2,... On the circumference Rf to the force action lines T0, T1, T2,... Is smaller than the distance from the point Q to the action lines T0, T1, T2. Since the pressing force acting on the cam body KK is constant, the rotational moment around each point of f0, f1, f2,. Therefore, the cam body can be rotated with a small rotational force.
As can be determined from FIG. 13B, by moving the rotating body rotating shaft away from the cam body rotating shaft, the angle at which the cam wheel enters the cam sliding surface is reduced, and the cam wheel easily moves on the sliding surface. Become.

FIG. 15 (b) illustrates the case where the rotating body rotation axis O is brought closer to the distance Ln from the cam body rotation axis Q. FIG. 15 (b) is the reverse of FIG. 15 (a). I can say that. The position of the rotating body rotation axis O when the cam wheel is at the positions b0, b1, b2,... On Rb, the points n0, n1, n2 on the circumference Rn having a radius Ln with O as the center. Shown in.
The distance from each point n0, n1, n2,... On the circumference Rn to the force action lines T0, T1, T2,... Is larger than the distance from the point Q to the action lines T0, T1, T2. Since the pressing force acting on the cam body KK is constant, the rotational moment around each point of f0, f1, f2,. Therefore, a large rotational force is required to rotate the cam body.

The door that closes arbitrarily with the minimum spring force described above rotates at a speed that can barely move without stopping, but it accelerates as long as the force acts on the rotational movement, and at a low speed. Accelerates even when rotating and reaches maximum speed when closed.
In addition, when the door is closed, not only the door is rotated but also the operation of fitting the latch attached to the side surface of the door into the latch hole provided in the door frame is added. Therefore, the force required for closing the door is a larger force than the force required for rotation. A normal spring-operated door requires a “greater force than necessary when rotating” when it begins to open, and the force that opens further increases as it opens, making the door feel heavier when opening the door .

As in the present invention, the large force required to start opening the door works only when the door is sealed, and if it is not involved in the rotation of other doors, a large force is required to start opening the door. Even so, a large force is not required for the subsequent rotation of the door.
Even if the hand is released from a slightly opened state, the door starts to close, and it is necessary to operate the touch device, which is a reverse rotation prevention device for the door, to strongly press the door against the door. For this reason, when the door is closed, another force that is greater than the minimum force required during rotation is required.

In the cam body sliding surface described above, the gradient of the cam body sliding surface with respect to the moving direction of the cam wheel is set so that the cam wheel does not stop. The speed at which the cam wheel moves on the sliding surface of the cam body is small even if the pressing force acting on the moving surface or the sliding surface of the cam body on the cam wheel, that is, the strength of the spring is large.
Further, the force required to move the cam wheel is irrelevant even if the spring force is large and the spring force does not affect the force required when the door is opened.

The gradient of the cam body sliding surface described above applies a part of the spring force in the direction of movement of the cam wheel during rotation, and the portion of the cam body sliding surface near the cam body rotation axis (hereinafter referred to as the starting point). ) Can be changed so that all of the spring force acts in the direction of cam wheel movement when closed. By changing the gradient of the sliding surface of the cam body between the vicinity of the starting point and other parts, the large force of the spring can be applied only when the door is closed without being operated when the door is opened and closed.
That is, by suddenly changing the direction of the line of action of the spring force when the door is closed, a large sealing force can be applied to the door when the door is closed. When this sealing force is insufficient, a spring that acts on the door only at the time of sealing is added as will be described later with reference to FIGS.

In this way, if the door can be sealed even from a position where the door is slightly opened, when the door closes from a fully open state, a larger sealing force is added in addition to the force acting at the time of rotation when the door is closed. As a result, the door that has been accelerated and has reached the maximum speed is further accelerated immediately before closing.
Therefore, it is necessary to apply the brake immediately before closing, but the frictional resistance or the like by the brake shoe that is normally used is to weaken the rotational force acting on the door by applying a force in the opposite direction. If the rotational force is merely weakened, the problem can be solved by making the direction of the pressing force acting on the cam wheel described above more toward the center of rotation.
FIGS. 16 to 18 change the shape of the curve of the cam body sliding surface described in FIGS. 1 to 15 in the vicinity of the starting point of the cam body sliding surface. Is gradually approaching the direction toward the center of rotation, and the rotational force applied to the door is insufficient just before the door is closed, so that the rotational speed of the door is decelerated and eventually stops.

The present invention has a feature that "the door does not feel heavy when the door is opened" even if the door is tightly sealed after closing at low speed, and finely adjusts the rotational speed of the door despite moving with a spring. The door has a structural feature that "does not use frictional resistance by adjusting the magnitude of the rotational force".
The rubber wheels are deformed to increase the ground contact area and the rolling friction is large, but they are worn out and the material and performance are easily deteriorated, and the effect of the rolling friction is unstable. The cam wheel of the present invention is not deformed, and a grounding surface is a point and a rolling wheel having a small rolling friction is used, for example, a steel wheel is preferable. If possible, a wheel with a bearing is desirable. It is intended not to feel heavy.

FIG. 19 is to move the door stopped just before closing, and by adjusting the distance between the cam body rotation shaft and the rotation body rotation shaft, the action line of the pressing force described in FIGS. This is to recover the rotational force that is insufficient immediately before the door is closed by moving it away from a state close to the center of rotation, and to tightly seal the door after it is decelerated just before the door is closed.
The means for applying the brake immediately before closing is difficult to adjust the brake and either stops or starts to move too quickly. However, in the adjustment described in FIG. 19, the deceleration speed can be adjusted steplessly.

The curve of the cam body sliding surface shown by the dotted line in FIG. 16A is the curve drawn in FIG. 3A, and FIG. 16 explains the curve near the start point of the cam body sliding surface that follows this curve. Is. The curve of the sliding surface of the cam body indicated by the dotted line in FIG. 16 (a) sufficiently reduces the speed of the door to be closed, but the same rotational force is output when the door is sealed, so the door is sealed. The power to do is insufficient.

When the linear sliding surface KC indicated by the two-dot chain line is continuous near the starting point of the curve of the cam body sliding surface K, the operating line of the pressing force that the sliding surface KC acts on the cam wheel B and the rotating body A The distance from the rotation axis O increases, and the door is tightly sealed. When the convex sliding surface KD indicated by the two-dot chain line continues in the vicinity of the starting point of the curve of the cam body sliding surface K, the sliding surface changes from a concave surface to a convex surface, and the sliding surface KD changes to the cam wheel B. The distance between the line of action of the working pressing force and the rotation axis O of the rotating body A is further increased.
Even if the door closing speed is low, it closes while accelerating, but when it is sufficiently decelerated and the impact at closing is small, the linear sliding surface KC or the like near the starting point of the curve of the cam body sliding surface K The convex sliding surface KD may be continuously accelerated immediately before the door is closed, but the arc sliding surface KA indicated by the solid line is continuously formed near the starting point of the curve of the cam body sliding surface K. Thus, it is desirable to seal tightly while decelerating immediately before closing the door.

To close the door tightly, when opening the door, it is necessary to apply the same force as the force that tightly closes the door in the opposite direction, and to pull the door away from the door. It will be felt heavy, and the object of the present invention, “the characteristic that the door does not feel heavy when opening the door” will be impaired.
Adding a structure that tightly seals the door complicates the structure. In addition, if the structure in which the rotational speed of the door is reduced before the door is tightly sealed, not only the structure becomes complicated, but also the adjustment becomes difficult. For this reason, instead of adding a structure that strongly seals the door, the linear sliding surface KC and the convex sliding surface KD are continuously formed near the start point of the curve of the cam body sliding surface K. It is most desirable if it can be satisfied with only a spring that tightly seals after rotating the door with a weak force on one cam body sliding surface.

In FIG. 16B, the cam wheels B0, B1,... That move on the circular orbit Rb centered on the rotation axis O are arcuate sliding surfaces that are continuous near the starting point of the curve of the cam body sliding surface K. KA0, KA1,... Are in contact with the contacts b0, b1... And straight lines T0, T1... Passing through the contacts b0, b1. A line of pressing force acting on the cam wheel B passes through the centers C0, C1,... Of the arcs KA0, KA1,..., And the wheel B moves on the circular track Rb in a direction approaching the cam body rotation axis Q. Accordingly, the distances l3, l2,... With the rotation axis O decrease, and when the points Q, b1, C1, and O are in a straight line, the distance between the force action line T1 and the rotation axis Q becomes zero. When the wheel B slightly moves from the position of B1 to b0, the distance l3 with the rotation axis Q suddenly increases from zero to a large value. Thus, the rotational force decreases just before the door closes, and the door stops rotating in the middle.

The curve of the cam body sliding surface indicated by the dotted line in FIG. 17 (a) is a curve drawn according to the drawing method described in FIG. 6 (b), and FIG. 17 shows the vicinity of the starting point of the continuous cam body sliding surface. This curve will be described. The curve of the sliding surface of the cam body indicated by the dotted line in FIG. 11 (a) sufficiently reduces the speed of the door to be closed, but the same rotational force is output when the door is sealed, so the door is sealed. The power to do is insufficient.
When the linear sliding surface KC indicated by the two-dot chain line continues to the cam body sliding surface K, the distance between the pressing force acting line T acting on the cam wheel B and the rotating shaft O of the rotating body A is increased, and the door Will be tightly sealed.

FIG. 17A shows a modification of the vicinity of the start point of the cam body sliding surface K indicated by the dotted line to a straight line KB indicated by the solid line. It will be.
In FIG. 17B, when the straight line KB rotates and the cam wheel B moves along the circular orbit Rb, and the revolution moves sequentially to the positions b2, b1, and b0, the action line of the pressing force is T2, T1, It changes to T0, and it is designed so that the action line T1 may pass through the rotation axis O at the intersection b1.
When the cam wheel B slightly moves from the intersection point b to b0, the cam wheel moves along the radial portion from the start point of the cam sliding surface toward the cam body rotation axis O, and the action line T0 and the rotation axis O The distance l0 increases rapidly.

FIG. 18 (a) is a modification of the straight line KB shown in FIG. 17 in which the vicinity of the starting point of the sliding surface K shown in FIG. 7 is shown by a solid line, and the movement of the wheel B shown in FIG. 18 (b). The change in the direction of the action line T associated with is the same as the change shown in FIG.

19 (a), 19 (b), and 19 (c) respectively change the distance between the cam body rotating shaft and the rotating body rotating shaft from the state shown in FIGS. 16 (b), 17 (b), and 18 (b). Thus, the rotational force is increased, and by adjusting the distance between the rotating shafts, the state of stopping in the middle described in FIGS.
In FIG. 19 (a), the state of stopping halfway shown in FIG. 16 (b) is indicated by a dotted line, and the state in which the rotation is increased by increasing the distance between the rotation axes is indicated by a solid line.

When the rotating body rotation axis is moved from the position O to the position Off and away from the cam body rotation axis Q, the circular orbit of the wheel B also moves from Rb indicated by the dotted line to Rbb indicated by the solid line, but the arcs KA3, KA2,. ... There is no change in the positions of the centers C3, C2,..., And the direction of the force action line is changed so as to move away from the center of rotation. As shown in FIG. 19 (a), the distances l3, l2,... From the rotation center of the force action line do not become zero and increase as a whole.
When the rotating body rotating shaft is gradually moved away from the cam body rotating shaft Q, the force acting line gradually stops from a state where the distance from the rotation center is zero in a state of stopping in the middle as shown in FIG. The door can be shifted from a state where it is stopped halfway just before closing to a state where it is gradually moved, and the rotational speed of the door immediately before closing can be set to a speed at which it stops or does not stop.

In FIG. 19B, the state that stops in the middle of the state shown in FIG. 17B is indicated by a dotted line, and the rotational force increases by reducing the distance between the rotary shaft of the rotary body and the rotary shaft of the cam body. This state is indicated by a solid line. When the cam body rotation shaft is moved from the Q position to the Qn position and brought closer to the rotation body rotation axis O, the intersection angle between the circular orbit Rb and the straight line KB increases at each intersection b3, b2,. It becomes easy. The distances l3, l2,... Of the force action lines T3, T2... From the rotation center O become large, and unlike the case of FIG. This also means that a great deal of force is required when opening a closed door.

As the sliding surface KB rotates, the cam wheel moves on the sliding surface KB toward the starting point. In FIG. 19B, the cam wheel moves beyond the starting point of the sliding surface KB in the radial direction. The force action line T0 moves upward, and the distance l0 between the direction force action line T0 and the rotation center O is extremely increased in the tangential direction.
When the cam body rotating shaft is moved away from the rotating body rotating shaft O, when the sliding surface KB rotates, the cam wheel does not reach the position b0 shown in the figure, but moves back on the sliding surface KB and acts on the force. And the center of rotation O is increased to seal the door.

FIG. 19 (c) shows a state that stops in the middle shown in FIG. 18 (b). The cam wheels B0, B1, B2,... Are always at the position of the starting point b0 of the cam sliding surface. This indicates that the line of action of the pressing force always passes through the rotation center Q, and that the rotation of the cam body always stops even if the rotation axis of the rotation body moves away from the rotation axis of the cam body. The cam body in FIG. 19C is the “cam body on the rotating side” in FIG. 7, and the direction of the line of action of the pressing force is not related to the position of the rotating body rotation shaft.

FIG. 19 is an explanatory diagram of a device that tightly seals while decelerating, and adjusts from a state of stopping just before closing to a state of starting movement. FIG. 20 is a device that continues to move even if the door is decelerated until it stops. If the door stops rotating as shown in FIG. 19, the device does not stop and does not stop functioning.
FIG. 20 shows that the cam body rotation axis Q moves in the apparatus shown in FIG. 19A, and FIG. 19A shows that the cam body rotation axis is fixed at the position of Qo in FIG.
The cam wheel (not shown in FIG. 20) moves on the circle Rb around the rotation axis O along the cam sliding surface KA, and the line of action T of the force of the pressing force is always the contact point between the cam wheel and the cam sliding surface. And the center C of the arc KA0.

The cam wheel stops when it is at the intersection b between the circle Rb and the cam sliding surface KA. In FIG. 20 (a), the cam body rotation shaft moves circularly around the intersection b and is Q0, Q1, Q2,. If the wheel B moves, the wheel B stays at the position of the intersection b and does not move even on the cam sliding surface KA. At this time, the action lines T0, T1, T2 of the pressing force pass through the centers C0, C1, C2 of the arcs KA0, KA1, KA2, and the rotation from the center O of the revolution of the wheel B increases to give the rotation A Power increases.
That is, when the cam wheel B stops at the intersection b just before the door is closed and the cam body rotation shaft moves on the circle Rq, the cam body continues to rotate even if the cam wheel B and the door stop. And a strong sealing force comes to work.

20 (b) and 20 (c), the cam body rotation axis Q is provided at the tip of a link Ak that rotates around the rotation axis QQ, and moves on a circumference Rq around the rotation axis QQ. The position of the cam body rotation axis Q when the link Ak hits G0 and the rotation is limited is Q0, and the position when the link Ak hits G2 is Q2.
When the tension spring V is attached to the fulcrum Sk provided on the cam body KK and the fixed fulcrum Sw, when the distance between the rotation shaft Q and the cam wheel is larger than the distance between the rotation shaft Q2 and the fulcrum Sk, the cam body rotation shaft is It is in the Q0 position. The cam body KK rotates around Q0, and the cam wheel moves on the cam body sliding surface KA. When the distance between the rotating shaft Q and the cam wheel is smaller than the distance between the rotating shaft Q2 and the fulcrum Sk, the cam body KK rotates around the intersection b between the cam wheel and the cam sliding surface, and the link Ak rotates. To do. At this time, the wheel B is stopped, but the cam body sliding surface KA moves along the wheel B.

After the position of the cam body rotation shaft moves to Q2 and the link Ak hits and hits G2, the cam body KK rotates around Q2 and the cam wheel moves and rotates again. In FIG. 20 (b), the action line T2 of the pressing force once approaches the center of rotation O, but in FIG.
In FIG. 20C, the link Ak and the cam body rotate instantaneously in FIG. 20C, but in FIG. 20B, the link Ak and the cam body rotate while decelerating.
In FIG. 20C, the cam body rotation axis Q moves away from the position b where the cam wheel B is stopped. When the position of the cam body rotation axis Q moves away from the cam wheel B, the link Ak easily rotates around the rotation axis QQ, and the cam body rotates while accelerating. In FIG. 20B, the cam body rotation axis Q moves closer to the position b where the wheel B is stopped. At this time, the link Ak is difficult to rotate around the rotation axis QQ, and the cam body rotates while accelerating.

When the position of the rotation shaft QQ of the link Ak is changed from the state of FIG. 20C to the state of FIG. 20B in a state where the rotating body A does not rotate and the position of the cam wheel is not changed, that is, the link When the position of the rotation axis QQ of Ak is made closer to the rotation body rotation axis O, the pulling spring cannot be contracted by the rotation of the link Ak, or the cam body cannot be rotated in the reverse direction. If the rotating body A does not rotate after the position is changed, the rotation of the link Ak also stops, the entire apparatus stops, and the door does not rotate again.
20 (b) and 20 (c), as long as the tension spring contracts or the cam body continues to rotate in the same direction, even if the movement of the cam wheel stops or the cam body slides back on the device, Keeps moving. FIG. 20 shows that even if the movement of the cam wheel is stopped or decelerated, the link Ak is rotated and the device continues to move, so that the door is temporarily stopped just before the door is closed, and it starts moving again. It is to make.

In this case, when the link Ak rotates, it does not rotate in a no-load state accompanied by the operation of rotating the door, so that depending on the case, the link Ak may or may not stop. That is, by moving the position of the rotation axis QQ of the link Ak closer to the rotation body rotation axis O, it is possible to adjust the limit of whether the door stops or not.
For this reason, by changing the position of the rotation axis QQ of the link Ak, it is possible to adjust the “degree to which the position of the cam body rotation axis Q moves closer to the cam wheel B that is temporarily stopped”, just before the door closes. You can control the duration of the pause state.

The temporary stop just before the door closes means that the device does not need to rotate the door, and the operation that the device keeps moving due to the rotation of the link Ak, etc. is an operation that ends in an instant because no load is applied. Become.
In FIG. 20C, when the position of the cam body rotation axis Q moves away from the cam wheel B that is once stopped, the link Ak rotates around the rotation axis QQ in an instant.

In FIGS. 20B and 20C, “the force that the cam body rotation shaft moves and the cam body rotates around the point Q2 and presses the cam wheel B immediately before closing the door” is “just before the door closes”. The cam body rotation shaft does not move and the cam body rotates around the point Q0 and presses the cam wheel, so the sealing force is small. However, when the closed door is opened, it opens with a smaller force. I can do it.
Also, the cam body rotation shaft moves immediately before the door closes and the cam body rotation shaft moves just before the door closes than the cam wheel rotation position when the cam body rotates around the point Q0 just before the door closes. The position of the cam wheel B when rotating around the point Q2 is farther from the rotation center of the cam body, and the pressing force acting on the cam wheel when the spring force gives the same rotation force to the rotation of the cam body. Is smaller, the cam body can be rotated with such a small force when opening the closed door, and the door can be opened with such a small force.
By tightly sealing the door in this way, the disadvantage that the door feels heavy when the door is opened can be solved.

FIG. 21 shows that the cam body rotation axis Q moves in the apparatus shown in FIG. 19B, and FIG. 19B fixes the cam body rotation axis in the position of Qo in FIG.
The cam wheel not shown in FIG. 21 moves on a circle Rb centered on the rotation axis O along the cam sliding surface KB, and the line of action T of the pressing force is always orthogonal to the cam sliding surface KB. When the cam wheel moves on the circle Rb and the cam sliding surface KB and is at the intersection b of the circle Rb and the cam sliding surface KB, the action line T0 of the pressing force passes through the center O of the cam wheel revolution. The cam wheel stops. In FIG. 21 (a), if the cam body rotation shaft moves circularly about the intersection point b and moves to Q0, Q1, Q2,..., The wheel B remains at the position of the intersection point b and the cam sliding surface KA. Does not move even above. At this time, the action lines T0, T1 and T2 of the pressing force increase the distance from the center O of the revolution of the wheel B and the rotational force applied to the rotating body A increases. That is, when the cam wheel B stops at the position of the intersection b just before the door closes and the cam body rotation shaft moves on the circle Rq, the cam body KK continues to revolve even if the cam wheel B and the door stop. Operates and has a strong sealing force.

21 (b) and 21 (c), the cam body rotation axis Q is provided at the tip of a link Ak that rotates around the rotation axis QQ, and moves on a circumference Rq around the rotation axis QQ. The position of the cam body rotation axis Q when the link Ak hits G0 and the rotation is limited is Q0, and the position when the link Ak hits G2 is Q2.
When the tension spring V is attached to the fulcrum Sk provided on the cam body KK and the fixed fulcrum Sw, when the distance between the rotation shaft Q and the cam wheel is larger than the distance between the rotation shaft Q2 and the fulcrum Sk, the cam body rotation shaft is It is in the Q0 position. The cam body KK rotates around Q0, and the cam wheel moves on the sliding surface K. When the distance between the rotating shaft Q and the cam wheel is smaller than the distance between the rotating shaft Q2 and the fulcrum Sk, the cam body KK rotates around the intersection b between the cam wheel and the cam sliding surface, and the link Ak rotates. To do. At this time, the wheel B moves along the cam sliding surface KB.
After the position of the cam body rotation shaft moves to Q2 and the link Ak hits and hits G2, the cam body KK rotates around Q2 and the cam wheel moves and rotates again.

In FIG. 21 (b), the position of the cam body rotation axis Q moves closer to the position b where the wheel B is stopped. In FIG. 21 (c), the position of the cam body rotation axis Q stops the wheel B. Move away from the current position b.
In FIG. 21 (b), the position of the cam body rotation axis Q moves closer to the position b where the wheel B is stopped. In FIG. 21 (c), the position of the cam body rotation axis Q stops the wheel B. Move away from the current position b.
In FIG. 21B, the wheel B moves without returning on the cam sliding surface KB, and in FIG. 21C, the wheel B moves while returning on the cam sliding surface KB. 21 (b) and 21 (c), “the force that the cam body rotation shaft moves and the cam body rotates around the point Q2 and presses the cam wheel B immediately before closing the door” is “just before the door closes”. The cam body rotation shaft does not move and the cam body rotates around the point Q0 and presses the cam wheel, so the sealing force is small. However, when the closed door is opened, it opens with a smaller force. I can do it.

FIG. 22 is a diagram for explaining the operation of the embodiment shown in FIGS. 1 to 5, and shows a fully open state, a halfway closed state, a state just before closing, and a state at the time of sealing in order from (a) to (d). In the entire process of closing the door, the cam body KK rotates in the direction of arrow A about the rotation axis Q, and the rotation body A rotates in the direction of arrow C about the rotation axis O. At this time, the cam wheel B moves along the circumference Rb around the rotation axis O in the direction of the arrow B while moving along the sliding surface K.

The sliding surface K of the cam body KK has the vortex K described in FIG. 2 and FIG. 3 as the outer periphery, and the straight line connecting the contact point b between the cam wheel B and the sliding surface and the rotational axis Ib of the wheel B is the cam body sliding. In the range from the start of closing of the door shown in FIGS. 22 (b) to 22 (c) due to the action line of the force with which the surface presses the cam wheel, the rotary shaft O is kept at a constant distance. In this range, the door rotates with a constant rotational force and the spring force is set to the weakest force so that the door starts moving without stopping wherever the hand is released from the opened door.

As shown in FIG. 22 (c), the cam body sliding surface is composed of a K portion engaged in the range (A) where the door rotates and a KA portion engaged in the range (I) where the door is sealed while decelerating. The cam sliding surface KA has been described with reference to FIG.
Even if the cam wheel moves largely on the sliding surface K in the range (A), the cam body rotation and the change in the length of the spring V are small, and in the range (I), the cam wheel is on the sliding surface KA. Even if it is moved slightly, the rotation of the cam body and the change in the length of the spring V are large.
Further, the distance between the action line Fb of the force with which the cam body sliding surface presses the cam wheel and the rotation axis O of the rotating body A is small in the range (A), and the rotational speed of the rotating body is low. ) Is large and the rotating speed of the rotating body is high.

The cam body KK is connected to the metal fitting W attached to the door frame via two links Akk, Ak, and the cam body rotation axis Q revolves around the connection axis QQ provided on the link Akk, as described in FIG. The door is sealed while slowing down.
FIG. 22D shows a state in which the link Ak rotates and hits G2 when sealed. Further, the link Akk is rotated in the direction of the arrow D around the connection axis QQQ by the adjusting screw GB attached to the metal fitting W, and the gap Lg between the metal fitting W and the link Akk is adjusted to thereby By adjusting the distance OQ between the rotation axes, the rotation speed of the door can be adjusted as described with reference to FIGS.

FIG. 22A shows a state in which the door fully opened range is expanded by the rotation of the link Akk, and the door is stationary when fully opened.
In a range close to the time when the door is fully opened, the cam body rotates greatly only by rotating the rotating body A slightly, and even if the cam wheel B moves slightly on the circular track Rb, it moves largely on the cam sliding surface K. Further, since the pressing force acting on the cam wheel is directed in the direction of the rotation axis Q as the door is opened, a large brake is applied to the rotation of the cam body in the vicinity of the cam wheel reaching the end of the sliding surface as shown in FIG. . For this reason, there is a limit to extending the cam sliding surface K, and it is difficult to open the door beyond the rotation angle shown in FIG.

Therefore, as shown in FIG. 22A, the link Akk rotates around the connection axis QQQ, and the rotation more than the rotation angle shown in FIG. 22B is enabled. The change in the length of the spring V during rotation of the link Akk is small, the line of action of the spring force Fv approaches the center of rotation QQQ, and the angle of intersection between the cam wheel B and the sliding surface K becomes small. Since the direction of the action line of Fb is directed to the rotation center O, the entire apparatus of FIG. In the fully open range of the door shown in FIG. 22 (a), it remains stopped no matter where you let go.

FIG. 23 is a diagram for explaining the operation of the embodiment shown in FIG. 6. (a) is a fully opened state of the door, and (b) and (c) are respectively just before closing when the cam body KK rotating shaft Q does not move and when it moves. Shows the state when sealed. In the entire process of closing the door, the cam body KK rotates in the direction of arrow A about the rotation axis Q, and the rotation body A rotates in the direction of arrow C about the rotation axis O. At this time, the cam wheel B moves along the circumference Rb around the rotation axis O in the direction of the arrow B while moving along the sliding surface K.
The sliding surface K of the cam body KK has the vortex K described in FIG. 6B as the outer periphery, and the straight line connecting the contact point b between the cam wheel B and the sliding surface and the rotation axis Ib of the wheel B is the cam body sliding. In the range from the start of closing of the door shown in FIG. 23 (a) by the action line of the force by which the moving surface presses the cam wheel to the point immediately before closing, the rotating shaft O is kept at a constant distance. In this range, the door rotates with a constant rotational force and the spring force is set to the weakest force so that the door starts moving without stopping wherever the hand is released from the opened door.

As shown in FIG. 23 (b), the cam body sliding surface is composed of a K portion engaged in a range (A) where the door rotates and a KB portion engaged in a range (I) where the door is sealed while decelerating. The cam sliding surface KB has been described with reference to FIG.
In the range (A), even if the cam wheel moves largely on the sliding surface K, the cam body rotation and the change in the length of the spring V are small. In the range (A), the cam wheel is on the sliding surface KB. Even if it is moved slightly, the rotation of the cam body and the change in the length of the spring V are large.
Further, the distance between the action line Fb of the force with which the cam body sliding surface presses the cam wheel and the rotation axis O of the rotating body A is small in the range (A), and the rotational speed of the rotating body is low. ) Is large and the rotating speed of the rotating body is high.

The cam body KK is connected to the metal fitting W attached to the door frame via the link Ak, the cam body rotation shaft Q revolves around the connection shaft QQ, and seals the door while decelerating as described in FIG. become.
The link Ak is rotated in the direction of the arrow D around the connection axis QQ by the adjusting screw GB attached to the metal fitting W, and the cam L and the rotary body are rotated by adjusting the gap Lg between the metal fitting W and the link Ak. By adjusting the distance OQ between the shafts, the rotation speed of the door can be adjusted as described in FIG.

When the gap Lg between the metal fitting W and the link Ak is increased, the distance OQ between the rotating shafts of the cam body and the rotating body approaches, and the action line Fb of the force that the cam body sliding surface presses the cam wheel and the rotating body A The distance to the rotation axis O increases and the rotation speed of the rotating body increases.
As shown in FIG. 23B, when the distance between the action line Fb of the force pressing the cam wheel and the rotation axis O of the rotating body A is large, the cam body KK rotating shaft Q does not move and the cam body moves. KK rotates about the rotation axis Q in the direction of arrow A. During this time, the cam wheel B moves along the circumference Rb around the rotation axis O in the direction of the arrow B while moving along the sliding surface K. At the same time, the rotating body A rotates about the rotation axis O in the direction of the arrow C.

When the gap Lg between the metal fitting W and the link Ak is reduced, the distance OQ between the rotating shafts of the cam body and the rotating body is reduced, and the action line Fb of the force that the cam body sliding surface presses the cam wheel and the rotating body A The distance to the rotation axis O becomes smaller and the rotation speed of the rotating body becomes slower.
As shown in FIG. 23 (c), when the distance between the action line Fb of the force pressing the cam wheel and the rotation axis O of the rotating body A is small, the link Ak rotates and the cam body KK rotating shaft Q becomes Moving. After the link Ak hits and hits G2, the cam body KK rotates about the rotation axis Q in the direction of arrow A.
During this time, the cam wheel B moves in the reverse direction along the sliding surface K. At the same time, the rotating body A rotates about the rotation axis O in the direction of the arrow C. However, as shown in FIG. The rotation is slow.
FIG. 23A shows a state in which the fully open range of the door is expanded by the rotation of the link Ak.

22 and 23, one cam body sliding surface rotating around one rotating shaft has two functions. One cam body sliding surface diagram shown in FIGS. The “cam body sliding surface having a function of closing while decelerating” described above and the “cam body sliding surface having a function of sealing tightly after being decelerated” described in FIGS. In this case, since “adjustment for closing while decelerating” and “adjustment for tight sealing after deceleration” are processed simultaneously, when one of the two adjustments is satisfied, the remaining one adjustment is It is not always satisfied.
If the spring has the "force to release the door from the position where the door is slightly opened and the door is sealed", it has the "force to close the door from any position", so the spring "opens the door a little It is not necessary to have a force greater than the “seal that the door is sealed when the hand is released from the closed position”. However, in the case where one cam body sliding surface in FIGS. 22 and 23 has two functions, the closing speed is fast even if the door is sealed, or the door is not sealed even if the closing speed is reduced. In some cases, the two functions cannot be adjusted to the most desirable state at the same time.

24 and 25 are "cam body sliding surface having a function of closing while decelerating" and "cam body sliding surface having a function of tightly sealing after decelerating" of one cam body sliding surface of FIGS. The two functions can be adjusted to the most desirable state at the same time.
26 and 27 are “cam body sliding surface having a function of closing while decelerating” and “cam body sliding surface having a function of tightly sealing after decelerating” of one cam body sliding surface of FIGS. Rotate around different rotating shafts, separate “operation to close while decelerating” and “operation to close tightly after decelerating”, close after decelerating, temporarily stop and tightly seal It can be adjusted and can be adjusted separately.

FIG. 24 is a diagram for explaining the operation of the embodiment shown in FIG. 7, wherein (a) is a fully opened state of the door, (b) and (c) are states immediately before closing in the case of two different cam body sliding surfaces, Shows the sealed state. In the entire process of closing the door, the cam body KK rotates in the direction of arrow A about the rotation axis Q, and the rotation body A rotates in the direction of arrow C about the rotation axis O. At this time, the cam wheel B moves along the circumference Rb around the rotation axis O in the direction of the arrow B while moving along the sliding surface K. The embodiment of FIG. 24 differs from the embodiment of FIGS. 22 and 23 in that the cam body sliding surface does not press the cam wheel, but the cam wheel presses the cam body sliding surface so that the cam body sliding surface is Rotate.

The sliding surface K of the cam body KK has the vortex K described in FIG. 6B as the outer periphery, and the sliding surface of the cam body covers the portion of K engaged in the range (a) where the door rotates and the door while decelerating. It consists of the part of KB that engages in the sealed range. The cam sliding surface KB has been described with reference to FIG.
The cam body KK includes a cam body KK1 having a vortex K as an outer periphery and a cam body KK2 having a cam sliding surface KB as an outer periphery. The body KK2 can be rotated around the connection axis Ik to fix the angle Θk between the cam body KK1 and the cam body KK2.

Cam wheels B1 and B2 are attached to the respective rotation support shafts Ib1 and Ib2 provided at the tip of the rotating body A, and the preceding cam wheel B1 and the following cam wheel B2 move on the cam body sliding surfaces K and KB, respectively. And does not move on KB, K. As shown in FIG. 24A, after the preceding cam wheel B1 moves on the cam body sliding surface K and rotates the cam body KK, as shown in FIGS. The cam wheel B1 moves away from the cam body sliding surface K, and the subsequent cam wheel B2 comes into contact with the cam body sliding surface KB.

FIG. 24B shows a case where the angle Θk between the cam body KK1 and the cam body KK2 is small. “A straight line connecting the contact point b between the cam wheel B2 and the sliding surface and the rotation axis Ib of the wheel B, that is, the cam body. The distance between the action line Fb of the force with which the sliding surface presses the cam wheel and the cam body rotation axis Q is small, and the rotational speed of the door is reduced, but the cam body KK1 and the cam body shown in FIG. When the angle Θk between KK2 is large, the distance between the force action line Fb and the cam body rotation axis Q is large, and the door is strengthened without reducing the rotation speed of the door as shown in FIG. Seal.

The rotating body A is connected to a metal fitting W attached to the door frame via a link Ak, and the rotating body rotating shaft O revolves around the connecting shaft QQ.
The distance OQ between the rotating shaft of the cam body and the rotating body is adjusted by rotating the link Ak in the direction of the arrow D around the connecting shaft QQ by the adjusting screw GB attached to the metal fitting W, as described in FIG. The rotation speed of the door can be adjusted.

Springs V1 and V2 are attached to the rotating body A, and within the range (A) in which the door rotates as shown in FIG. 24 (a), the line of action of the force of the spring V1 and the rotation axis O of the rotating body A The distance between them is large, and the door is rotated by the force of the spring V1. The distance between the line of action of the force of the spring V2 and the rotation axis O of the rotating body A is small, and the force of the spring V2 has little influence on the rotation of the door.
As shown in FIGS. 24B to 24D, the distance between the action line of the force of the spring V2 and the rotation axis O of the rotating body A is large within the range (i) in which the door is sealed, and the force of the spring V2 is large. Seal the door with. The fixed fulcrum Sw of the spring V1 is attached to the tip of an arm As that is rotatably supported around the rotation axis QQ, and when the spring V1 returns to the natural length after rotating the door, the arm As is rotated about the rotation axis QQ. Rotate around in the direction of arrow e. Immediately before the door is closed, the force of the spring V2 does not affect the rotation of the door, and the door is not accelerated at the time of sealing. While the spring V1 rotates the door, the arm As is prevented from rotating around the rotation axis QQ in the direction of the arrow D by Gs.

In the range (a) in which the door rotates, the door rotates greatly and rotates at a low speed. Therefore, the length of the spring V1 needs to change greatly and the spring force acting on the door needs to be small. Further, in the range (i) in which the door is sealed, since the door is sealed with a strong force by a slight rotation of the door, the change in the length of the spring V1 is small, and the force of the spring acting on the door needs to be large. It is desirable to use springs with different performances in the range in which the door rotates (A) and the range in which the door is sealed (I). When relaying from the spring V1 to the spring V2, the spring V1 that works first works later. It is desirable not to affect the spring V2 so that the door does not accelerate just before the door closes.

FIG. 25 is an operation explanatory view of an embodiment in which the shape of the sliding surface of the cam body is different from FIG. 24, FIG. 25 (a) is a fully opened state of the door, FIG. 25 (b) is a state immediately before closing, and FIG. ) Indicates the sealed state. In the entire process of closing the door, the cam body rotates about the rotation axis Q in the direction of arrow A, and the rotation body A rotates about the rotation axis O in the direction of arrow C. At this time, the cam wheel moves on the circumference Rb around the rotation axis O in the direction of the arrow B while moving along the sliding surface. The rotating body rotates when the cam body sliding surface presses the cam wheel.

The cam body KK includes a cam body KK1 having a vortex K as an outer periphery and a cam body KK2 having a cam sliding surface KB as an outer periphery. The cam body KK1 and the cam body KK2 are coupled by a connecting shaft Ik, and are cammed by an adjustment screw Bk. The body KK2 can be rotated around the connection axis Ik to fix the angle between the cam body KK1 and the cam body KK2.
The sliding surface K of the cam body KK1 is a portion K which is engaged in the range (A) where the door rotates, and the sliding surface KA is a portion which is engaged in the range (I) where the door is sealed while decelerating.

Cam wheels B1 and B2 are attached to the respective rotation support shafts Ib1 and Ib2 provided at the tip of the rotating body A, and the preceding cam wheel B1 and the following cam wheel B2 move on the cam body sliding surfaces K and KA, respectively. And does not move on KA and K. As shown in FIG. 25 (a), the preceding cam wheel B1 moves on the cam body sliding surface K in the range (A) in which the door rotates, and as shown in FIG. 25 (b), the preceding cam wheel. After B1 rotates the cam body KK, the preceding cam wheel B1 moves away from the cam body sliding surface K, and the subsequent cam wheel B2 comes into contact with the cam body sliding surface KA.

The distance between each of the rotation support shafts Ib1 and Ib2 provided at the tip of the rotation body A and the rotation body rotation shaft is different, and the distance between the rotation support shaft Ib2 of the subsequent cam wheel B2 and the rotation body rotation shaft is the preceding cam. As described with reference to FIG. 10B, even if the sliding surfaces KA and K that move along the rotation support shaft Ib1 of the wheel B1 and the rotation axis of the rotating body have the same distance, When the “distance between the body rotation axis and the rotation body rotation axis” is made closer, the rotation speed of the door is reduced at a position far from the position where the door is closed.

FIG. 25B shows a case where the angle between the cam body KK1 and the cam body KK2 is small, and the distance between the action line Fb of the force with which the cam body sliding surface presses the cam wheel and the cam body rotation axis Q is small. Reduce the door rotation speed. As shown in FIG. 25 (c), the distance between the force action line Fb and the cam body rotation axis Q is increased, and the door is tightly sealed.

As described with reference to FIG. 5, the spring V that rotates the cam body has a small distance from the cam body rotation axis in the action line of the force of the spring V, that is, the axial line of the spring V, within the range of rotation of the door. In the range (i) in which the rotational force is weakened and the door is sealed, the spring V moves away from the arc guide Ks, and the axial center line of the spring V gradually increases the distance from the cam body rotational axis to increase the rotational force. In order for the spring force to be strong enough to seal the door, it is necessary to rotate the door. The greater the rotation of the door necessary to seal the door, the greater the door rotation until the door closes. The door will accelerate during that time.

The spring described in FIGS. 24 and 25 is a spring that works when the door is sealed, but is involved in the rotation of the door. Just increasing the strength of the spring a little increases the rotation speed of the door, and the strength of the spring greatly affects the rotation of the door, so when adjusting to increase the strength of the spring when sealing the door, As a result, the rotation speed of the door was increased.
The strength of the spring should be as small as possible in the range for sealing the door, and it is desirable that the spring force when the spring for sealing the door works does not work. As will be described later with reference to FIG. 28, the spring that seals the door needs to be a spring that generates a large force only at the moment of sealing the door.

However, tightly sealing the door also means that the door feels heavy when the door is opened, and providing a separate spring that strongly seals the door complicates the structure. Further, even if the spring that tightly seals the door works only when the door is tightly sealed, it gives a considerable resistance to the rotation of the door, making adjustment of the spring difficult. For this reason, instead of preparing a separate spring for tightly sealing the door, the door can be tightly sealed after rotating the door with a weak force with only one spring, as in the spring described in FIG. If so, that would be the most desirable.

24 and 25, separate cam wheels move on two cam body sliding surfaces with different shapes, the door rotates at a low speed in the range where the door rotates, and the door is tightly sealed in the range where the door is sealed. To do. In FIG. 26, a device for rotating the door and a device for sealing are separately provided so that the device for sealing is activated after the device for rotating the door is activated, and the rotational force acting on the door is interrupted in the middle and newly reopened. When taking over the door from the rotating device to the sealing device, the stationary sealing device transitions to the motion state and over time by doing extra work, The door is temporarily stopped immediately before the door is closed.
The device for rotating the door is such that the cam wheel described in FIG. 7 presses the cam body to rotate the cam body, and the cam wheel B1 presses and rotates the cam body KK1. The device for sealing the door is based on the arc-shaped sliding surface described in FIG. 7. By making the sliding surface an arc-shaped sliding surface K close to a straight line having a large curvature, the cam body sliding surface K becomes the cam wheel. By increasing the change in the distance between the action line Fb of the force pressing B3 and the cam body rotation shaft Q1, and applying the force in the opposite direction to the cam wheel B3 moving on the sliding surface K, the rotational speed of the door is increased. Slow down. The force in the opposite direction is a force generated when the toggle spring V3 expands and contracts when the cam wheel B3 moves on the arcuate sliding surface K3 provided on the metal fitting W attached to the door frame.

The distance between each of the rotation support shafts Ib2 and Ib3 of the wheels B2 and B3 provided at the tip of the cam body KK1 and the cam body rotation shaft Q1 is different, and the rotation support shaft Ib3 and the cam body rotation shaft of the subsequent cam wheel B3 Is smaller than the distance between the rotation support shaft Ib3 of the preceding cam wheel B2 and the rotating body rotating shaft, and the sliding surface K of the cam body KK2 moving along these is the same, so in FIG. As described above, when the “distance from the rotating shaft to the tip of the cam wheel” of the rotating body is reduced, the rotational speed of the door is accelerated near the position where the door is closed.

While the shape of the sliding surface K of the cam body KK2 is in contact with the preceding cam wheel B2, it is a circle parallel to the circle Rb centered on the cam body rotation axis Q1, and the cam wheel B2 Even if the cam body KK1 is not involved in the contact, the cam body KK1 is involved in the rotation of the cam body KK1 when the subsequent cam wheel B3 comes into contact.
During this time, the cam body KK1 continues to rotate, but when the cam wheel B3 contacts the sliding surface K of the cam body KK2, the cam body KK2 is involved in the rotation of the cam body KK2 for the first time. Since the cam body KK2 starts the rotation of the cam body KK1 for the first time, the rotation of the cam body KK1 is decelerated due to inertia moving from static to moving.

FIG. 26 (a) shows a fully opened state of the door, FIG. 26 (b) shows a state during closing, 26 (c) shows a state immediately before closing, and FIG. 25 (d) shows a closed state. In the process of sealing the door, the cam body KK2 rotates in the direction of arrow A about the rotation axis Q2, and the cam body KK1 rotates in the direction of arrow C about the rotation axis Q1. At this time, the cam wheel moves along the circle Rb around the rotation axis Q1 in the direction of the arrow B while moving along the sliding surface. The rotating body A1 that attaches the cam wheel B1 to the tip rotates around the rotation axis O in the direction of the arrow D.
The wheel B2 moves along the sliding surface K of the cam body KK2 from the fully open state in FIG. 26 (a) to the state just before the closing in 26 (c). During this time, the cam body KK2 does not rotate and remains stationary. Further, since the length of the spring V2 does not change, the force of the spring V2 does not contribute to the rotation of the cam body KK2. Just before the closing shown in FIG. 26 (c), the cam wheel B3 comes away from the sliding surface of the cam body KK2 and contacts the sliding surface of the cam body KK2. At the moment when the wheel B2 is separated from the sliding surface of the cam body KK2, the force of the spring V2 acts on the cam body KK2, and unlike the case of FIGS. Become.

26 (c), the cam body KK1 rotates more strongly as the distance between the action line Fb of the force that rotates the cam body KK2 and presses the cam wheel B3 and the rotation axis Q1 of the cam body KK1 increases. Is small, the moving speed along the sliding surface K of the cam wheel B3 is decelerated, and the rotational speed of the door that has been accelerated from fully open to immediately before closing is decelerated.
That is, the force of the spring V2 acts on the cam body KK2 and the cam body KK2 rotates to press the cam wheel B3. This operation is performed when the wheel B2 is separated from the sliding surface of the cam body KK2. Is activated by a large action on the cam body KK2, and the spring V2 and the cam body KK2 that have been stationary until now have a sense of quietness to keep them stationary, and it takes time to start exercising suddenly. Is required. The passage of time temporarily stops the door just before closing.

The distance between the line of action Fb of the force pressing the cam wheel B3 and the rotation axis Q1 of the cam body KK1 can be adjusted by changing the position at the moment when the wheel B1 leaves the sliding surface of the cam body KK1. The more the cam body KK1 is pressed and rotated by the wheel B1 after contacting the sliding surface K of the cam wheel B3, the more the force acting line Fb pressing the cam wheel B3 and the rotation axis Q1 of the cam body KK1. The distance increases, and the cam body KK2 cannot remain stationary, and the door does not remain stopped immediately before closing.
The rotation of the rotating body A1 around the rotation axis O in the direction of the arrow D is limited by the adjusting screw GB, and the position at the moment when the wheel B1 is separated from the sliding surface of the cam body KK1 can be adjusted by the adjusting screw GB.

FIG. 26 (d) shows a state where the cam wheel B3 moves on the sliding surface K of the cam body KK2 immediately before the closing shown in FIG. 26 (c). The wheel B2 attached to the tip of the arm A2 that rotates in the direction moves on the arc sliding surface K3 provided on the metal fitting W attached to the door frame, and the toggle spring V3 expands and contracts. The expansion and contraction of the toggle spring V3 immediately before the closing shown in FIG. 25 (c) reduces the rotational speed of the door. However, when the sealing shown in FIG. No longer involved in sealing the door.

The means for decelerating immediately before the door is closed shown in FIGS. 24 to 26, when the door is rotated and the device engaged in the sealing range is separated from the rotation of the door to the sealing. Although the rotation transmission mechanism causes discontinuity, the method shown in FIGS. 24 and 25 has the same rotating shaft on the cam body side that gives rotation to the rotating body, and the rotation of the cam body is the same. continuing.
In the method shown in FIG. 26, the rotating shaft on the cam body side that gives rotation to the rotating body is separated by two devices, and the device engaged in the sealed range remains stationary until the operation of the device engaged in the range in which the door rotates is completed. doing. In the method shown in FIG. 26, a force in the opposite direction acts on the rotation of the rotating cam body to be braked, but the braking is continued.
In the method of FIG. 27, when the door rotation is inherited from the rotation of the door, the rotation transmission mechanism is discontinuous by performing the extra work of starting the device engaged in the sealed range by the device engaged in the range in which the door rotates. It will cause.

FIG. 27 is the same as FIG. 26. FIG. 27A is a fully opened state of the door, FIG. 27B is a state diagram in the middle of closing, 27C is a state immediately before closing, and FIG. Indicates the state. In the process of sealing the door, the cam body KK2 rotates in the direction of arrow A about the rotation axis Q2, and the cam body KK1 rotates in the direction of arrow C about the rotation axis Q1. At this time, the cam wheel B3 moves on the circumference Rb around the rotation axis Q1 in the direction of arrow B. The rotating body A1 that attaches the cam wheel B1 to the tip rotates around the rotation axis O in the direction of the arrow D.

In FIG. 26, when the door is opened, the cam body KK1 rotates in the direction opposite to the arrow C direction by opening the closed door, and the cam body KK2 is rotated in the direction opposite to the arrow A direction around the rotation axis Q2 by the cam wheel B2. Rotate. Even if the door is fully opened, the cam body KK2 is prevented from rotating and returning in the opposite direction by the cam wheel B2, so that a passage for the cam wheel B3 when the door is closed is secured.
On the other hand, in FIG. 27, when the door is opened, the cam wheel B3 moves along the sliding surface K of the cam body KK3, so that the cam body KK3 is centered on the rotation axis Q in the direction opposite to the arrow E direction. Rotate. The cam wheel B3 moves away from the sliding surface K of the cam body KK3, but the wheel B2 of the cam body KK3 moves along the sliding surface K3 provided on the metal fitting W so that the cam body KK3 is self-supporting on the sliding surface K3. A line connecting the rotation axis Q of the cam body KK3 and the rotation support shaft of the wheel B2 is orthogonal to the sliding surface K3. The cam body KK3 self-supports on the sliding surface K3, thereby preventing the cam body KK2 from rotating in the reverse direction and securing the passage of the cam wheel B3 when it is closed.
The cam body KK3 is rotatably supported at the intermediate portion via the cam body KK2 and the connecting shaft Q, and the sliding surface is located on the side closer to the rotating shaft Q2 with the connecting shaft Q in the middle and the far side. The wheel B2 is attached to the rotating spindle at the end of the sliding surface KA. Gw provided on the metal fitting W prevents the wheel B2 from moving along the sliding surface K3 provided on the metal fitting W.

When the door is closed, the cam wheel B3 moves circularly about the rotation axis Q1, moves on the circular track Rb in the direction of arrow B, and comes into contact with the sliding surface KA of the cam body KK3 standing upright on the sliding surface K3. Then, the cam body KK3 is moved in the direction of arrow E about the rotation axis Q. In the design of the spring V1 for rotating the cam body KK1, when the cam body KK1 finishes rotating, the force of the spring V1 has a force to rotate the cam body KK3 around the rotation axis Q, and the cam body KK3 starts to rotate. The force for rotating the rotating body A1 is lost. When the cam body KK3 starts to rotate, the cam body KK3 is rotated exclusively by the force of the spring V2 without depending on the force of the spring V1.

Next, the spring mechanism for rotating the drive unit described above will be described. When the door is sealed, the cam wheel moves along the cam body sliding surface in a direction approaching the rotation axis of the cam body. When the cam body rotates with a constant rotational force, the closer the cam wheel is to the rotation axis of the cam body, the greater the pressing force acting on the cam wheel, but the force of the spring that rotates the cam body increases as the cam body rotates. The force is lost, and the pressing force acting on the cam wheel does not increase but keeps a constant value.
Even if the pressing force acting on the cam wheel does not maintain a constant value, the speed at which the cam wheel moves on the cam body sliding surface is not significantly affected. The speed at which the cam wheel moves on the cam body sliding surface is affected by the direction of the acting line of the force acting on the cam wheel, and is not significantly affected by the pressing force acting on the cam wheel and the strength of the spring.

In the method shown in FIGS. 26 and 27, the spring that seals the door works only when the door is sealed without rotation of the door. And the number of parts is larger than the method shown in FIGS. An increase in the number of parts means an increase in factors that affect the rotation of the door, and an increase in the factors makes it difficult to control the rotation of the door because these factors influence each other.
The spring that works only when sealing the door described below is a single axis of rotation for the device that gives rotation to the door and the device that seals the door as shown in FIGS. 24, 25 or earlier. It applies to a certain device.

In FIG. 28, the rotation and sealing of the door are not processed with one spring as shown in FIG. 25, but are processed with two springs as shown in FIG. FIG. 29 shows a case in which a spring for sealing the door is suddenly generated with a large force only at the moment when the door is sealed, and the rotation of the door due to the suddenly generated large force is reduced.
FIG. 28 is an explanatory view of the mechanism of the spring described in FIG. 24. FIG. 28 is an operation explanatory view of a relay from the spring V1 engaged in the rotation of the door to the spring V2 engaged in the sealing. FIG. It is operation | movement explanatory drawing of the spring made to act.
In FIG. 28, the rotating body J fixed to the rotating shaft Q around the rotating shaft Q provided on the plate W rotates in the direction of arrow → i in the drawing to close the door.
Links S1 and S2 are rotatably supported on rotation support shafts SJ1 and SJ2 provided on the rotating body J, and tension springs V1 and V2 are connected to connection shafts SU1 and SU2 at the tips of the links S1 and S2, respectively. One end is connected. The other ends of the tension springs V1 and V2 are connected to a connecting shaft SA at the tip of the rotating arm A that is pivotally supported by the rotating shaft I attached to the plate W and a connecting shaft SW provided on the plate W, respectively.

28A shows a state when the door is fully opened, FIG. 28B shows a state immediately before closing, and FIG. 28C shows a state when the door is sealed. As shown in FIG. 28A, the link S1 rotates around the rotation axis Q while its side surface is connected to the rotation axis Q, and the end Sv of the link S1 moves circularly around the rotation axis Q. Thereafter, the link S1 is separated from the rotation axis Q, and as shown in FIG. 28B, immediately before the door is closed, the spring V returns to its natural length, and the spring force becomes zero.
In the process of shifting to FIGS. 28A to 28B, the length of the spring decreases to weaken the force, but the distance L1 between the line of action F1 of the spring force and the rotation axis Q increases, and the spring V1 is The rotational moment applied to the rotating body J is kept as constant as possible.
The spring V1 is a coil spring having a large coil diameter with respect to the length, and the position where the spring V1 returns to the natural length is constant. When the force of the spring V1 becomes zero, as shown in FIG. It rotates in the direction of arrow → b in the figure around the rotation axis I.

As shown in FIGS. 28 (a) and 28 (b), the link S2 is in contact with Gs from the time of full opening until just before closing, and keeps the end Sv2 at the position of the rotation axis Q. Accordingly, there is no change in the length of the spring V2 from the time of full opening until just before closing, and the force of the spring V2 is not involved in the rotation of the rotating body J.
As shown in FIG. 28 (c), before the spring fulcrum SV is separated from the rotation axis Q, the axis line of the link S and the axis line of the spring are bent, and the moment of separation becomes a straight line. Immediately before closing, the link S2 moves away from the contact Gs, and while increasing the distance L2 between the action line F2 of the force of the spring V2 and the rotation axis Q, the rotation moment around the rotation axis Q is increased and the door is moved with a strong force. Seal. At this time, the greater the distance between the rotating shaft Q and the connecting shaft SJ2, the greater the distance L2 between the action line F2 of the force of the spring V2 and the rotating shaft Q due to the smaller rotation of the rotating body J.

The structure shown in FIG. 28 (c) is obtained by replacing the spring V and the link S in the structure shown in FIGS. 28 (a) to 28 (c), and each of the rotation support shafts SJ1 and SJ2 provided on the rotating body J is pulled. One end of the springs V1, V2 is connected, and the other end of the springs V1, V2 is connected to one end of the links S1, S2. FIG. 28 (c) shows the fully opened state as shown in FIG. 28 (a), and the structure shown in FIG. 28 (c) has the same effect as described in FIGS. 28 (a) to 28 (c). Can be obtained.
In the structure shown in FIG. 28C, the hit Gs is provided not on the rotating body J but on the plate W. As in the case of FIGS. 28A to 28C, the link S2 hits from the time of full opening to just before closing and is brought into contact with G2 so as to keep the end Sv2 at the position of the rotation axis Q.

In the spring mechanism shown in FIG. 28, the rotation of the rotating body J until the fulcrum SV of the spring is separated from the rotation axis Q and the rotation moment about the rotation axis Q is greatly increased is as small as possible, that is, sealed as much as possible. In order to reduce the rotation of the door, the larger the distance between the rotating shaft Q and the connecting shaft SJ2, the better. However, the device needs to be enlarged. In FIG. 29, a large rotational force is instantaneously applied to the door during sealing without enlarging the apparatus.
The link S, the rotary shaft I spring V and its fulcrum SV, SW shown in FIG. 29 perform the same operation on the link S2, the rotary shaft SJ2 spring V2 and its fulcrum SV2, SW shown in FIG. 28, respectively. The wheel B is attached to the link S. In FIG. 29, instead of the hit Gs shown in FIG. 28, the circumferential sliding surface K2 centering on the rotation axis Q brings the end Sv to the position of the rotation axis Q. It plays the role of fastening.

As shown in FIGS. 29A and 29B, the wheel B moves along the circumferential sliding surface K2, so that the fulcrum SV of the spring V is held at the position of the rotation axis Q. Further, as shown in FIG. 29 (b), even if the wheel B moves away from the sliding surface K2, the wheel B moves along the concave surface of the sliding surface K1, and the wheel B slides near the end point of the sealing operation in FIG. 29 (c). The spring fulcrum SV is greatly pulled away from the rotation axis Q away from the moving surface K1.
As shown in FIG. 29 (b), before the fulcrum SV of the spring is separated from the rotation axis Q, the axis line of the link S and the axis line of the spring are bent, and as shown in FIG. It becomes a straight line. Thus, when the link S and the spring suddenly become a straight line, the distance S between the action line F of the force of the spring V and the rotating shaft instantaneously shows the maximum value, so that the rotational moment around the rotating shaft also causes the door to close. It occurs instantaneously at the end. That is, the force of the spring V acts only on a slight rotation of the door on which the latch operates.

When the wheel B moves on the sliding surface K1K2, the rotational speed of the rotating body J is reduced by rolling friction, but when the sealing force is finally applied, the spring V is released from these frictional resistances and sealed. It will show you all the power you can have. When the wheel B moves on the sliding surface K1, the rotational speed of the door is reduced. Further, when the wheel B moves on the sliding surface K2, the rotational speed of the door is decelerated just before closing, and temporarily stops. As shown in FIG. 28, the end Sv of the spring is held at the position of the rotation axis Q by the contact Gs, and the end Sv of the spring is moved to the rotation axis Q by the sliding surface K2 as shown in FIG. If it is kept in position, the door can be rotated while decelerating and the door can be tightly sealed simply by attaching the drive part of this spring structure to the door.
In FIG. 29 (c), the arrow → b indicates the moving direction of the wheel B when the closed door is opened, and the wheel B moves on the inner convex surface of the sliding surface K1 when the door is closed. When opening, the wheel B moves on the outer convex surface of the sliding surface K1.

As shown in FIGS. 29D and 29E, the rotating shaft Q shown in FIGS. 29A and 29B is composed of a circular rod M and a cylindrical bearing N through which the circular rod M penetrates. When the rotating body J is attached to the end of the circular rod M away from the bearing N and the spring force is applied to the end of the circular rod M, the concentrated load acts on the end of the cantilever. On the other hand, the circular rod M is bent and causes friction with the cylindrical bearing N through which the circular rod M passes. As shown in FIGS. 29A and 29B, the rotation of the rod M is resisted and decelerated while the end Sv is held at the position of the rotation axis Q.
The friction between the circular rod M and the bearing N increases as the distance Lm from the cylindrical bearing N to the end of the circular rod M on which the spring force acts increases, and the end of the circular rod M from the cylindrical bearing N increases. The rotational speed of the door can be adjusted by adjusting the distance Lm. If the rotating shaft Q shown in FIG. 28 is a cylindrical bearing N and a circular rod M shown in FIGS. 29 (d) and 29 (e), the rotation of the rotating shaft Q rotating only by this spring is transmitted to the rotation of the door. By simply attaching the drive part of the spring structure to the door, the door can be rotated while decelerating and the door can be tightly sealed.

Other examples of the “spring that suddenly generates a large force at the moment when the door is sealed” shown in FIG. 29 are shown in FIGS.
FIG. 30 shows the tangential movement of the circular motion around the connection axis Sj of the link S, as in FIG. It is blocked by moving along the upper Kw, and the fulcrum Sv of the spring is kept at the position of the rotation center Q.
In the case of FIG. 29, the wheel Bs moves along the inner side of the arc of the sliding surface Kw, whereas in FIG. 30, the wheel Bs moves along the outer side of the arc of the sliding surface Kw. When the wheel Bs changes to the sliding surface Kw, the fulcrum Sv of the spring is pulled to the position of the rotation center Q.
In the case of FIG. 29, it rotates while shortening the length of a spring, and in the case of FIG. 30, it rotates while extending the length of a spring. The rotation speed of the rotating body J is accelerated in the case of FIG. 29 and decelerated in the case of FIG.

In FIG. 31, an arc sliding surface Ks centered on the fulcrum Sv of the spring is provided at the tip of the link S, and the wheel Bw moves along the sliding surface Ks, so that the connection axis Sj of the link S is centered. The movement in the tangential direction of the circular motion is prevented.
32 and 33 are different from FIGS. 29, 30, and 31, the spring V is rotatably supported around the rotation fulcrum Sj of the rotating body J, and the link S is rotatably supported around the rotation fulcrum Sw. .
When the door is opened from the state where the door is completely closed, the rotating body J rotates in the opposite direction to ⇒, and the wheel B passes on the surface on the opposite side to the surface that is in contact with the sliding surface K when the door is closed. To do. The surface where the wheel B contacts the sliding surface K when the door is closed is the inner side in FIGS. 29, 32 and 33 and the outer side in FIGS.
When the door is opened, the wheel B passes the outside in FIGS. 29, 32, and 33, and passes the inside in FIG. In all cases of FIGS. 29 and 30 to 33, when the door is opened, it passes through a route different from the route when the wheel B is closed, and in either case, it passes while extending the spring. You can also open the door with less resistance

In FIG. 31, the wheel Bw is attached to the tip of an arm Ab that rotates around the rotation axis Ia. When the door is closed, the arm Ab rotates in a direction that hits Gb, and when the door is opened, it rotates in a direction away from Gb. In the case of FIG. 31, when the door is opened, the fulcrum Sv of the spring returns to the position of the rotation center Q while keeping the spring and the rotating body in a straight line. When the door closes and the spring fulcrum SV moves away from the center of rotation Q and the door hits the door in a moment, the door rotates and the spring expands and contracts slightly, but in this case the door is moved away from the door. When opening, in the case of FIG. 33, the rotation of the door and the expansion and contraction of the spring are slight.

In the range of Y ± 0 to Y + 30, that is, the range where the link S and the contact Gj are in contact, there is no portion where the link S and the contact Gj of the sliding surface K are in contact. The length of the sliding surface is shortened so that when the door is opened in this range, the sliding surface can move to the contact surface side when the wheel B is closed. Further, when closing the door in the range of Y-30 to Y ± 0, even if the spring force increases continuously, the amount of rotation of the door is small, so that the impact when accelerating or closing is not a problem. There is no difference in the force of the spring that presses the door against the door.

34 and 35 illustrate the connecting portion that transmits the constant rotational force described above to the door D. The apparatus is attached to the outer surface of the door that is opened by pulling the handle of the door.
The door drive unit is attached to the upper door frame, and is installed at a position higher than the door frame lower edge XX. The arm Da connected to the drive unit is at a position higher than the door frame lower edge XX, and the metal fitting Dw attached to the upper portion of the door is at a position lower than the door frame lower edge XX. In FIG. 34 (a), the roller Db attached to the tip of the arm Da moves in the elongated hole Dh of the metal fitting Dw attached to the upper part of the door, and is located at a position lower than the door frame lower edge XX. In FIG. 35B, the “arm Da and the link Dl connected to the metal fitting Dw attached to the upper portion of the door” are connected by the connecting shaft Dj. It is in a position lower than the connecting shaft Dj door frame lower edge XX.
All parts attached to the door and door frame do not enter the area sandwiched between the door drive door and the door frame, and therefore do not block the door opening and obstruct people passing through the door opening. do not become.

In FIG. 34, the cam body KK having the starting point of the cam body sliding surface described in FIG. 16 as KC is adopted as the driving portion in FIG. 34. In FIG. 35, the cam wheel tip described in FIG. A rotating body that is accelerated by decreasing the distance to the part is adopted as the driving part.
Even if the rotation transmitted to the door by the drive unit is constant, the position of the door fully opened, the position where the door decelerates, and the position where a strong sealing force is applied to the door change depending on the positional relationship when the drive unit and the coupling unit are attached. To do. The structure of the connecting part can adjust the door opening angle, the position where the door decelerates, and the position where a strong sealing force is applied to the door, regardless of the positional relationship between the drive part and the connecting part. There must be.

The embodiment of FIG. 34 shows a door that can be adjusted to the speed at which the door closing speed is stopped or not stopped. The cam body sliding surface K does not have a function of decelerating before the door is closed. Without the deceleration before the door is closed, the door is accelerated and sealed when the cam wheel B is on the straight portion 16KC of the cam body sliding surface. Here, the first numeral 16 of the code like 16KC indicates the number of the drawing to be referred to, that is, FIG.
However, if the door is accelerated and sealed when it is sufficiently decelerated and closed, there will be no severe impact sound when the door is closed. In general, even if it is sealed without decelerating in this way, it can withstand use as long as it does not emit a severe impact sound.

In the embodiment shown in FIG. 34, the closing speed of the door can be adjusted by changing the distance between the rotating body rotating shaft O and the rotating support shaft Ib of the cam wheel by the turnbuckle 10At as described in FIG.
In the embodiment shown in FIG. 34, the spring 28V2 for rotating the cam body rotation axis Q extends and contracts along the arc guide Kss described with reference to FIG. As shown in FIG. 34 (a), the wheel 29B attached to the link 29S is separated from the sliding surface 29S, and the spring 28V2 and the link 29S that work only at the time of sealing are in a straight line.
FIG. 34 (b) explains the operation of the door D rotating around the rotation axis Od and the connecting portion. The roller Db attached to the tip of the arm Da moves within the elongated hole Dh of the metal fitting Dw attached to the upper part of the door. The state of revolving around the rotating body rotation axis O is shown.

The embodiment of FIG. 35 illustrates the door described in FIG. 26, and the closing speed of the door is adjusted by the preceding wheel 26B2 rolling on the sliding surface of the cam body. When the door is closed, the spring 26V3 acts directly on the cam body 26KK1, and when the preceding wheel 26B2 leaves the cam body sliding surface and the subsequent wheel 26B3 moves on the cam body sliding surface, the door suddenly starts. It resembles and a strong rotational force is applied, and the door is tightly sealed.
FIG. 35B illustrates the operation of the connecting portion and the door D that rotates about the rotation axis Od. The rotation of the door is large relative to the rotation of the arm Da, and the rotation of the arm Da is the door when the door is fully opened. The door is in a state where it can be freely rotated manually and is easy to keep stationary. Also, when the door is closed, the sealing force of the door is directed in the direction of the door rotation axis Od, and even if the door hinge is loosened and rattled, the door is securely closed without damaging the door. I can do it.

FIG. 36 illustrates two links A and AA for connecting the connecting shaft P provided at the tip of the rotating body J that rotates about the rotating shaft Q and the connecting shaft C of the door D. The connection part which transmits rotation to a door is demonstrated. The connecting portion includes two links A and AA, and the end of the link A is bent into an L shape.
In FIG. 36, the rotating body J rotates about the rotation axis Q attached to the door frame, and the door D rotates about the rotation axis O. The connecting shaft P at the tip of the rotating body J and the connecting shaft C of the door are connected by two links A and AA. The links A and AA are connected by a connecting shaft PP.
As long as the rotating body J and the link A are not integrated by connecting the side surfaces to each other, the three points P, PP, and C are always in a straight line.
When the door is accelerated by inertial force immediately before the door is closed and the rotation of the rotating body J is delayed with respect to the rotation of the door D, the two links are bent, and the connecting point PP between the two links is a straight line connecting the rotation axis Q and the connection axis C. When the door D is in a region that does not include the rotation axis O with Z as a boundary, the door D is not closed even if it is rotated by the rotation of the rotating body J and the door is closed directly.

FIG. 36 illustrates the case where the rotating body reacts instantaneously and rotates quickly because the spring is instantaneously contracted if the door accelerates without the rotation of the rotating body J being delayed from the rotation of the door. A and AA keep a straight line without bending. FIG. 36 (a) shows a state immediately before the door is closed, and FIG. 36 (b) shows a state where the rotating body J is further rotated, but the connection points P, PP, C of the two links A, AA are always the same. It is on a straight line ZZ and the axis of the two links is not bent.

As described above, whether or not the connection axis PP is in the region including the rotation axis O with the straight line Z as a boundary is whether the rotation axis Q is within the region including the rotation axis O with the straight line ZZ as a boundary. Is the same.
When the end of the link A is bent into an L shape as shown in FIG. 36 (b), the connecting point PP always enters the region that does not include the rotation axis O with the straight line Z as a boundary, and the door opens once. If the door closes suddenly due to strong wind, it will remain stationary just before the door closes.

In the process of closing the door as in FIG. 36 (a), the connecting shaft P rotates about the rotation axis Q, and the rotation radius of the rotating body J in this case is L shown in the drawing. As shown in FIG. 36 (b), immediately before the door is brought into close contact with the door stop, the rotating body J and the link A rotate in close contact with each other, so the connecting shaft PP rotates around the rotational axis Q, In this case, the turning radius is LL shown in FIG.
When the rotation radius is extremely small in this way, the integrated link A and the rotating body J become levers with the rotation axis Q as a fulcrum, and the door is strongly pressed against the door stop Gd.

Since the link A is bent at a right angle, as shown in FIG. 36A, the point P is a door rotation axis O with a straight line Z connecting the rotation axis Q of the rotating body J and the connection axis C of the door as a boundary. When on the side, the point PP on the straight line PC is also on the O side. As shown in FIG. 36B, when the point P is on the side opposite to O with respect to the straight line Z, the point PP is also on the side opposite to O.
When the tip end of the link A is bent, the connection axis PP of the two links may be on the opposite side of O with respect to the straight line Z. At this time, if the link is pushed strongly in the closing direction, the force action line ZZ Is on the side opposite to O when viewed from the rotation axis Q, the rotating body J is rotated in the direction of arrow A as shown in FIG. 36 (b), and the connection axis PP is moved in the direction of arrow B, and the straight lines P, PP , C bends.
At this time, the rotating body J rotates in the opening direction, and the door cannot be closed. Further, even when the straight lines P, PP, and C pass through the rotation axis Q, even if a force is applied to the door, each link does not move and the door does not move. The door shown in FIG. 36 is a door that does not move even if the door is pushed immediately before the door is closed.

FIG. 37 shows a structure in which the connection axis P at the tip of the rotating body J that rotates about the rotation axis Q and the connection axis C of the door D that rotates about the rotation axis O are connected by links A and AA. The tip is bent at a right angle.
The portion indicated by the solid line in FIG. 37A is the state immediately before the door is closed. A portion indicated by a dotted line indicates a state where the door is fully opened and a state where the door is closed. In the fully opened state indicated by the dotted line in FIG. 37 (a), the rotating body J and the link A are in a separated state, and the connecting shafts P, PP, and C are on a straight line.
When the door is closed from the fully opened state, the angle formed by the rotating body J and the link A on the connecting shaft P gradually decreases, and the rotating body J and the link A immediately before closing the door as shown by the solid line in FIG. The angle between the rotation body J and the link A is overlapped and integrated. When the rotating body J and the link A come into contact with each other, the shape that remains in contact is maintained.
Further, the connecting shafts P, PP, and C are in a straight line until the rotating body J and the link A are overlapped and integrated. The line of action of the force with which the rotary shaft tip P pulls the door connecting shaft C is straight, regardless of the shape of the other link A, with the tip bent at a right angle.

When the rotating body J and the link A are overlapped and integrated with each other, the link A is bent at a right angle, so that the position of the connecting shaft PP passes through the rotating shaft Q and is perpendicular to the door. On the other side. The rotating body J and the link A that are united with each other rotate around the rotation axis Q, and the connection axis P of the link A and AA revolves around the rotation axis Q and has a circular arc locus substantially parallel to the door. To draw.
As shown by the dotted line in FIG. 37 (a), when the rotating body J and the link A are overlapped and integrated, the connecting shafts P, PP, and C are not in a straight line but the links A and AA are bent at the connecting shaft PP. . When the connecting axis PP goes to the center of the arc locus, A and AA try to approach a straight line from the bent state. That is, the connecting shafts P and C are moved away from each other.
At this time, when the direction component perpendicular to the moving door of the connecting shaft PP approaches the door, the door D rotates in the opening direction, and when the rotating body J further rotates and passes the center of the arc trajectory, the connecting shaft PP Since the direction component perpendicular to the moving door is the direction away from the door, the door D rotates in the closing direction again and presses the door against the door.
The reason why the door is rotated in the opening direction before the door is closed is that the position of the connecting shaft PP is on the opposite side of the door rotating shaft O of the straight line Y passing through the connecting shaft C and perpendicular to the door.

The connecting portion shown in FIG. 38 is different from FIGS. 36 and 37 in that the end of the link A is not a bent shape but a straight shape. When the tip of the link A is bent as shown by a solid line in FIG. 37 (a), the connection axes P, PP, and C are in a straight line until the rotating body J and the link A overlap, but the Y axis Connecting shafts P, PP, and C are not in a straight line. In the case of FIG. 38, when the rotating body J and the link A are overlapped and integrated, the connecting shafts P, PP, and C are on a straight line, and the position of the connecting shaft PP is a straight line connecting the rotating shaft Q and the connecting shaft C of the door. It is on the rotation axis O side of the door with Z as a boundary.
The connecting shaft PP revolves around the rotation axis Q and draws a circular arc trajectory almost parallel to the door, while the direction component perpendicular to the moving door of the connecting shaft PP is away from the door, and the door rotates in the opening direction. do not do.

In FIG. 38, by connecting the spring V to the connection shaft PP, the connection shafts P, PP, and C are not in a straight line from the fully opened state until the rotating body J and the link A overlap and become integrated. Links A and AA are bent. Further, before the rotating body J rotates and becomes parallel to the Y axis, the rotating body J and the link A are overlapped and integrated.
If it does in this way, it will rotate in the direction which a door opens by rotation of the rotary body J before a door closes like the case of FIG.
When Gq is attached to the connecting shaft PP so that the links A and AA do not bend any more in the connecting shaft PP, the door is rotated by the rotation of the rotating body in the range in which the door rotates in the opening direction as in FIG. Even if it can be moved, it does not move even if the door is pushed. This means that even when the door is strongly pressed by a strong wind or the like, the door does not close, and the door does not close with a finger or an impact.

FIG. 38B shows a state in which the door is slightly opened from the state where the door is closed. When the rotating body J rotates and opens the door, the overlapping rotating body J and link A close the door after opening the door slightly. However, if resistance is applied in the closing direction, the overlapping rotating body J and the link A rotate while being separated from each other, so that the connecting shaft PP has a PP + 5 shown in FIG. The door opens because it moves away from the rotation axis Q without reaching the position.
In the case of FIG. 37, when the connecting shaft PP moves on the locus of the arc and reaches the position of PP + 5 shown in FIG. 37A, the rotating body will not rotate by the door when the door is opened.

As shown in FIG. 37B, when the doors are slightly opened and the connecting shafts P, PP, and C are in a straight line, the position of the rotary shaft Q is on the moving direction side of the straight connecting shaft P connecting the connecting shafts P and C. When the door is opened slightly, the rotating body J and the link A try to overlap with each other, and the connecting shaft P does not rotate around the rotating shaft Q. That is, the rotating body J does not rotate. This door has the feature that it does not move when the door is operated in the same way as when the door is closed. Once closed, it will not open from the outside as if locked.

FIG. 38 solves the “defects that do not open from the closed state” of the door shown in FIG. 37. The structure of FIG. 38 is similar to the structure of FIG. 37, and the link A of FIG. Like link 37 of 37, it is made straight without being bent at the tip.
In FIG. 37, by connecting the spring V to the connecting shaft PP or C, the connecting shafts P, PP, and C are not in a straight line from the fully opened state to just before closing, and the links A and AA are bent at the connecting shaft PP. Yes.
Thus, before the rotating body J becomes parallel to the Y axis, the rotating body J rotates and overlaps the link A so as to be integrated, and the connecting point PP between the two links is a straight line Z connecting the rotating axis Q and the connecting axis C. In a region that does not include the rotation axis O and rotates in the opening direction before the door is closed. The more the position of the connecting shaft PP is within the region not including the rotating shaft O, the more the door rotates, and the rotation of the rotating body J is loaded and decelerated.

If the position of PP is within the region including the rotation axis O with the straight line Z connecting the rotation axis Q and the connection axis C as a boundary, the links A and AA bent at the connection axis PP are in a straight line and the connection axis Even if the distance between P and C is maximized, the connecting shaft PP moves in a direction away from the door rather than approaching the door, and therefore does not rotate in the opening direction immediately before the door closes.
In the range where the door rotates in the opening direction immediately before the door shown in FIG. 38A is closed, the rotation of the links A and AA on the connecting shaft PP is restricted by the contact Gq attached to the connecting shaft PP, and the door can push the door. It will not move. However, when the door is pushed open as shown in FIG. 38 (b), the position of the rotation axis Q is on the side opposite to the moving direction of the straight connection axis P connecting the connection axes P and C. Rotates while separating from the overlapped state, and the door opens.

Explanatory drawing of the drive unit that makes the closing speed barely start moving
Explanatory drawing of the drive unit that transmits the rotation in the opposite direction to the rotation of the cam body to the rotation body Explanatory drawing of the cam body sliding surface of FIG. Explanatory drawing of the drawing method of the cam body sliding surface of FIG. Explanatory drawing of the cam body sliding surface of FIG. 1 when the direction of the pressing force changes Explanatory drawing of the spring which transmits rotation to the cam body sliding surface of FIG. Explanatory drawing of the drive unit that transmits rotation in the same direction as the rotation of the cam body to the rotation body Explanatory drawing of the drive unit that transmits the rotation of the rotating body to the cam body Explanatory drawing of the drive unit that changes the rotation of the cam rotating body to the vertical movement of the cam wheel Explanatory drawing of the sliding surface of the cam body of FIGS. 1, 6 and 7 when the pressure is different

Explanatory drawing of a drive unit that finely adjusts the closing speed by adjusting the distance between the rotating shafts of the rotating body and the cam body
Explanatory drawing of the change of the distance between the rotating shafts of a rotary body and a cam body regarding FIG. Changes in the position of the rotating shaft of the rotating body and the cam body with respect to FIG. With respect to FIG. 1, the change in the distance between the rotating shafts of the rotating body and the cam body and the change in the direction of the pressing force Explanatory drawing of the change of the distance between the rotating shafts of a rotating body and a cam body regarding FIG. The drive unit of FIG. 6 that finely adjusts the distance between the rotating shafts of the rotating body and the cam body. The drive unit of FIG. 7 that finely adjusts the distance between the rotating shafts of the rotating body and the cam body.

Illustration of sliding surface to be sealed
The sealing part of the sliding surface in FIG. Sealing part of sliding surface in FIG. The sealing part of the sliding surface in FIG.

Illustration of sliding surface that seals while decelerating
Sliding surface of the arc of the cam body on which the rotating shaft moves The sliding surface of the arc of the cam body on which the rotating shaft revolves Sliding surface of the cam body where the rotating shaft revolves at a right angle

Explanatory drawing of sliding surface that can adjust closing speed and sealing force
The rotation transmission device of FIG. 1 in which the cam body rotation shaft revolves. The rotation transmission device of FIG. 6 in which the cam body rotation shaft revolves. The rotation transmission device of FIG. 7 in which the sliding surface for closing and the sliding surface for sealing are separated. The rotation transmission device of FIG. 1 in which the sliding surface for closing and the sliding surface for sealing are separated. The rotation transmission device of FIG. 1 in which a closing spring and a sealing spring are separately provided. Rotation transmission device that can adjust closing operation and sealing operation separately

Operation explanatory diagram of the spring that works only when closed and the spring that works only when sealed
Relay illustration from a spring that acts only when closed to a spring that acts only when sealed Action diagram of the spring acting only when sealed When a link that attaches a wheel to a rotating body is attached When a link with a sliding surface attached to a rotating body is attached When a spring is attached to a rotating body but a wheel is attached to a link When a spring is attached to a rotating body but a sliding surface is attached to a link

Operation explanatory diagram of the connecting part that transmits the rotation of the drive part to the door
Operation explanatory diagram of connecting part of drive part and door where roller moves in slot Operation explanatory diagram of connecting part connecting drive part and door with arm Action diagram of the door rotating in the opening direction Operation explanatory diagram of connecting part of door consisting of two links Illustration of the operation of the door that stops when struck by a strong wind

Explanation of symbols

A Rotating body or arm B Wheel C Circle center D Door or metal fitting G attached to door I Rotating shaft or rotating support shaft K Cam body or cam body sliding surface O Rotating shaft Q of rotating body R Rotating axis R of rotating body S Spring connecting shaft T Vertical line U Spring V Pull spring W Metal fitting or plate to be attached to door frame

Claims (1)

A rotating device in which the rotational moment acting on the cam body KK changes as the cam body KK that rotates about the rotation axis Q rotates.
A spring V having one of the attachment portions fixedly supported at a fixed point Sw and the other end of the attachment portion movably supported at a fulcrum Sk provided on the cam body KK along a vortex guide Kss about the rotation axis Q. As the cam body KK rotates, the fulcrum Sk moves circularly, the length of the spring V changes, and the distance between the spring V and the rotation axis Q changes. Rotating device.

Images