JP4529078B2 - Door opening assist device - Google Patents

Description

  The present invention relates to a door opening assist device that assists an operation force for opening a door to facilitate door opening.

  Buildings with high airtightness such as condominiums and buildings require a great deal of force when opening and closing the door, which places a heavy burden on children and the elderly. For this reason, a door opening assist device for assisting when the door is opened is used.

  A conventional door opening assist device is generally configured separately from a door closer, and a booster mechanism for assisting in opening the door is attached to the door or a wall supporting the door, and a knob (or a door) for opening the door (or By turning the lever, a booster mechanism is applied to reduce the force when the door is opened (see, for example, Patent Document 1).

On the other hand, when the door is opened, a door opening auxiliary mechanism consisting of a sub spring, an auxiliary piston, a second driving member, etc. that operates against a door closer driving mechanism consisting of a main spring, a main piston, and a first driving member is integrally formed on the same axis. A door closer connected on a line is disclosed (for example, see Patent Document 2).
Japanese Patent No. 3084269 Japanese Patent No. 3229782

  Since the conventional door opening assist device of Patent Document 1 is arranged at a location different from the knob for opening and closing the door, it is necessary to separately attach an operation member such as a dedicated knob for operating the door opening assist device. is there. However, when arranged separately from the door knob in this way, it is necessary to operate a knob dedicated to the door opening assist device in addition to the operation of the door original knob, which makes the operation complicated. There's a problem.

  In addition, since the door opening assist device is provided separately from the door knob, the door opening assist device is not only conspicuous, but also the number of parts to be attached to the door increases, resulting in a problem that the appearance is deteriorated.

  The closer of Patent Document 2 certainly improves the problems in Patent Document 1. However, the door opening assist mechanism, which is directly connected to the door closer mechanism, detects the rotation angle of the main shaft by an encoder provided on the main shaft during the door opening operation, and receives the signal from the control unit to command the motor, gear, auxiliary shaft, and pinion. Since the second drive member made of, for example, is rotated and the auxiliary piston is moved in the door closing direction, a complicated configuration and a control system are required, so that the apparatus becomes long and expensive. In addition, since a separate power source is required, the door opening assist mechanism does not operate in the event of a power failure or power failure, and there is a drawback that it becomes an obstruction due to a resistance force in the reverse direction of door opening and closing. Further, until the door is fully closed, the second drive member of the door opening assist mechanism continues to rotate so as not to become resistance of the door closing direction driving force of the door closer, and the operation of moving the auxiliary piston in the door closing direction is maintained. There is also the complexity that requires control.

  The present invention has been made in consideration of such conventional problems, and the object of the present invention is that an operation member other than a door opening / closing knob, an expensive electromagnetic control system, and an electric drive mechanism are not required. In addition, it operates in synchronization with the opening operation of the door, and the reliability of the full closing operation of the door can be improved, thereby improving the operability of opening and closing the door and making it compact and conspicuous Therefore, it is an object of the present invention to provide a door opening assist device that can prevent the appearance of the door from being deteriorated.

  In order to achieve the above object, in the door opening assist device according to the first aspect of the present invention, the passive member connected to the door closer that urges the door to rotate in the closing direction rotates forward and backward as the door is opened and closed. Causes the transmission member to reciprocate in the direction corresponding to the opening and closing of the door, and the opening spring urges the transmission member to move in the door opening direction as the door is opened, and opens when the transmission member moves. After the force is stored, the structure is locked in the opening force storage state, and the opening spring exerts the opening force by the rotation of the passive member in the predetermined angle region when the door is opened, and the opening spring opens. It is characterized in that it is locked in a state of storing open force and storing open force.

  According to a second aspect of the present invention, there is provided a door opening assisting device connected to a door closer for rotating and energizing the door in the closing direction, and a passive member that rotates forward and backward as the door is opened and closed, A transmission member that reciprocates in a direction according to opening and closing, and the transmission member that urges the transmission member to move in the door opening direction in accordance with the opening operation of the door and stores the opening force in the door opening direction by the movement of the transmission member. An open spring; a lock mechanism that locks the open spring in a state where the open force is stored by opening the door; and an unlocking member that unlocks the lock mechanism by closing the door. A meshing part is formed in a part, and the opening spring exerts an opening force by rotation within a predetermined angle region at the time when the door is opened, and the opening force is continuously stored and the opening force is stored. The engagement portion, characterized in that the meshing with the transmission member so as to click.

  According to a third aspect of the present invention, there is provided a door opening assisting device connected to a door closer for rotating and energizing the door in the closing direction, and a passive member that rotates forward and backward as the door is opened and closed, A transmission member that reciprocates in a direction according to opening and closing, and the transmission member that urges the transmission member to move in the door opening direction in accordance with the opening operation of the door and stores the opening force in the door opening direction by the movement of the transmission member. An open spring, a fixed member extending along the moving direction of the transmission member in a fixed state at a fixed position, and a biasing force of the open spring and a moving force acting between the transmission member along the fixed member The action member arranged between the opening spring and the transmission member so as to be movable, and the holding member are held by the fixed member, and the movement of the action member is locked by opening the door, and the opening spring is stored in the opening force. Lock on A lock mechanism having a lock ball, and a lock release member for releasing the movement lock of the action member by the lock ball with a closing operation of the door, wherein the passive member has a meshing portion formed on a part of the outer peripheral surface thereof, and the door The meshing portion meshes with the transmission member so that the release spring exerts an opening force by rotation within a predetermined angle region at the time of opening the opening and continuously stores the opening force and is locked in the opening force storage state. To do.

  According to a fourth aspect of the present invention, the door opening assist device is connected to a door closer that rotates and biases the door in the closing direction, and can be brought into contact with the passive member that rotates forward and backward as the door is opened and closed. A transmission member that reciprocates in a direction corresponding to the opening and closing of the door as the passive member rotates, and urges the transmission member to move in the door opening direction as the door opens and An opening spring that stores the opening force in the door opening direction by movement, a lock mechanism that locks the opening spring in the opening force storage state by the door opening operation, and an unlocking member that unlocks the locking mechanism by the door closing operation; A cam surface is formed on which the transmission member abuts against the passive member, and the release spring is opened by rotation in a predetermined angle region of the passive member when the door is opened. With the action of, opening spring is characterized in that it is formed so as to be locked in the opening force accumulated state stored the opening force.

  The door opening assist device of the invention according to claim 5 is connected to a door closer that rotates and biases the door in the closing direction, and can be brought into contact with a passive member that rotates forward and backward as the door is opened and closed, and the passive member. A transmission member that reciprocates in a direction corresponding to the opening and closing of the door as the passive member rotates, and urges the transmission member to move in the door opening direction as the door opens and Between the opening spring that stores the opening force in the door opening direction by movement, the fixing member that extends in the moving direction of the transmission member in a fixed state at a fixed position, and the transmission member that receives the biasing force of the opening spring and An action member disposed between the open spring and the transmission member so that the movement force can move along the fixing member, and the holding member is held by the fixing member. If you lock and release the movement A lock mechanism having a lock ball that locks the open member in a state where the opening force is stored, and a lock release member that releases the movement lock of the action member by the lock ball when the door is closed, and the transmission member contacts the passive member A cam surface is formed, and the cam spring applies an opening force by rotation within a predetermined angle region of the passive member when the door is opened, and the opening spring stores the opening force and stores the opening force. It is formed to be locked in a state.

  A sixth aspect of the present invention is the door opening assist device according to any one of the second to fifth aspects, wherein the lock for releasing the movement lock of the action member by the locking mechanism is delayed after the door is fully closed. A release delay mechanism is provided between the lock mechanism and the lock release member.

  The invention according to claim 7 is the door opening assist device according to claim 6, wherein the unlocking delay mechanism includes a lock spring that biases the unlocking member in a locking direction, and a biasing direction of the lock spring. It has at least a lock release spring that biases the lock release member in the opposite direction, and a damper mechanism that is provided on one side of the lock release member and slows the reciprocating movement of the lock release member. .

  The invention according to claim 8 is the door opening assist device according to claim 7, wherein the damper mechanism extends along one side of the unlocking member and includes a cylindrical hollow portion in which oil is sealed. And a piston part formed at one end of the unlocking member and slidably inserted along the inner wall of the cavity part, and a narrow channel communicating between the cavity part and the piston part. It is characterized by that.

  The invention according to claim 9 is the door opening assist device according to claim 2 or 3, wherein the transmission member is arranged in a pair so as to reciprocate independently, and the meshing portion of the passive member is , And are formed so as to be meshed with the respective transmission members.

  The invention described in claim 10 is the door opening assist device according to claim 2 or 3, wherein the passive member is a pinion gear and the transmission member is a rack.

  The invention according to an eleventh aspect is the door opening assist device according to the fourth or fifth aspect, wherein the transmission member includes a first transmission member and a second transmission member that reciprocate independently, and the cam The surface includes a first cam surface that receives the movement of the first transmission member that moves when the door is opened by the opening force of the opening spring, and the opening spring when the door is opened following the movement of the first transmission member. And a second cam surface for moving the second transmission member in the direction of storing the opening force.

  A twelfth aspect of the invention is the door opening assist device according to the eleventh aspect of the invention, wherein the second transmission member is urged by a return spring in a direction in contact with the second cam surface. And

  According to the first aspect of the present invention, since the opening spring applies the opening force when the door is opened, the operating force at the beginning of opening the door can be reduced. In addition, when the door is opened, the opening spring stores the opening force and is locked in a state where the opening force is stored, so that the opening spring can store the opening torque until the door is opened so that a person can go in and out. . For this reason, even if the door is not fully opened, it is possible to reduce the operation force in the next door opening operation. Therefore, the operability is improved, and an operation member other than the door opening / closing knob is not required, so that it is not noticeable, and a decrease in the appearance of the door can be prevented.

  In the invention according to claim 2, the opening spring exerts the opening force by the rotation up to the door opening just before the person can pass, that is, within the region of the predetermined angle when the door is opened. The transmission member is moved in accordance with the engagement between the meshing portion of the passive member and the transmission member so as to be locked in the storage state. After accumulating this opening force, it is possible not to add resistance even if the door is moved in the opening direction. In the direction of closing the door, the power of the door closer will not be reduced. Thereafter, when the door is closed, the lock release mechanism releases the lock. In other words, a series of operations in which the opening force acts in the direction of opening the door up to a certain angle and then the opening force is accumulated by continuously opening the door before the door can be opened and closed before the door can be opened. can do. For this reason, for example, even when the door is closed once again after it has been opened, the force generated by the opening force of the opening spring acting on the transmission member by rotating the passive member, that is, the door There is no malfunction such as failing to store the opening torque (hereinafter referred to as door rotation torque). As a result, when the door is closed, the door is always urged in the opening direction, so that the operating force at the beginning of the door opening can be reduced, and it can be operated only by unlocking the door. improves. Further, since an operation member other than the door opening / closing knob is not required, the operation member is not conspicuous, and the appearance of the door can be prevented from being deteriorated.

  Further, in this invention, the transmission member that stores the opening force of the opening spring meshes with the passive member that rotates in synchronization with the rotation of the pinion of the door closer, so that it can be assembled integrally with the door closer. With this, the whole including the door closer attached to the upper part of the door becomes compact, so that it does not get in and out and the appearance is improved.

  Furthermore, the door opening assist device of the present invention can be retrofitted to a standard door closer by a slight process such as connecting a passive member and a case.

  In the invention of claim 3, as in the invention of claim 2, the opening spring exerts the opening force by the rotation within the region of the predetermined angle at the time when the door is opened, and the opening force is continuously stored. The transmission member is moved in accordance with the engagement between the meshing portion of the passive member and the transmission member so as to be locked in the storage state. As a result, the opening force of the opening spring can be reliably stored without opening any more doors by opening the door until just before the person can pass, and after this opening force is stored, the door is moved in the opening direction. Also, no resistance can be added. Thereafter, when the door is closed, the lock release mechanism releases the lock by the lock ball. Therefore, in this invention, the same effect as that of the invention of claim 2 can be obtained.

  In the inventions of claims 4 and 5, the cam spring formed on the passive member causes the opening spring to exert an opening force by rotation within a predetermined angle region of the passive member when the door is opened, and the opening spring is the opening force. Since it is locked in the state where the opening force is stored, the opening spring can store the opening torque until the door is opened so that a person can go in and out. Accordingly, since the operation force can be reduced at the next door opening operation without fully opening the door, the operability is improved and no operation member other than the door opening / closing knob is required. Therefore, it does not stand out and can prevent the appearance of the door from being deteriorated.

  In the invention according to claim 6, in addition to the same effects as in the inventions according to claims 1 to 5, the movement lock of the acting member is released after the door is fully closed by the lock release delay mechanism, and the door After the door is closed and completely locked, an opening force is applied to open the door. Thereby, since the opening force does not act on the door until the door is fully closed, locking can be performed reliably, and the reliability of the door opening / closing operation is improved.

  In the invention according to claim 7, in addition to the same effect as the invention according to claim 6, when the door is closed, the unlocking member is biased by the unlocking spring in the direction opposite to the biasing direction of the locking spring, Further, the damper mechanism slows the movement of the unlocking member. By such a lock release delay mechanism, it becomes possible to release the movement lock of the action member with a delay after the door is completely closed. Thereby, since the opening force does not act on the door until the door is fully closed, the reliability of the operation for reliably locking is further ensured.

  In the invention according to claim 8, in addition to the same effect as that of the invention according to claim 7, the damper mechanism has a cylinder-like cavity in which the piston portion and the piston portion of the unlocking member are slidably inserted and oil is sealed. And a narrow channel communicating between the two parts. As a result, the unlocking member moves smoothly, and the viscosity of the oil or the narrow channel cross-sectional area can be easily adjusted and set, and the unlocking member moves slowly. The reliability of the operation of the fast unlocking delay mechanism can be further improved.

  According to the ninth aspect of the present invention, in addition to the same effects as those of the second and third aspects of the present invention, the transmission member is moved in a pair so that the movement of the transmission member and the opening force action of the release spring accompanying the movement are made. And smooth operation of opening force accumulation can be ensured.

  According to the invention described in claim 10, in addition to the same effects as those of the invention described in claims 2 and 3, since the passive member is a pinion gear and the transmission member is a rack, the reliability of driving force transmission is high. A simple and compact door opening auxiliary device can be configured.

  According to the eleventh aspect of the present invention, in addition to the same effects as those of the fourth and fifth aspects of the invention, the first cam surface is moved at the initial opening of the door by the opening force of the opening spring. In response to the movement of the first transmission member, the second cam surface moves the second transmission member in the direction in which the opening force of the opening spring is stored when the door is opened following the movement of the first transmission member. Thus, it is possible to ensure a smooth operation of the opening force action of the opening spring and the accumulation of the opening force accompanying the movement of the transmission member.

  According to the twelfth aspect of the invention, in addition to the effect of the eleventh aspect of the invention, the return spring urges the second transmission member in a direction in contact with the second cam surface. And the 2nd transmission member contact | abuts reliably, and reliability improves.

  Hereinafter, the present invention will be specifically described with reference to embodiments illustrated in the drawings.

  1 to 17 show a structure and an operating state of a door opening assist device according to a first embodiment of the present invention, and FIG. 1 is a front view of the door provided with the door opening assist device as viewed from the indoor side. 2 is a side view, FIG. 3 is a plan view, FIG. 4 is a cross-sectional view taken along line AA in FIG. 2, FIG. 5 is a cross-sectional view taken along arrow B in FIG. 7 is a cross-sectional view taken along the line DD of FIG. 6, FIG. 8 is an enlarged view of a portion E of FIG. 7, and FIGS. 9 to 17 are explanatory views showing an operating state of the door opening assist device.

  As shown in FIGS. 1 to 3, the door opening assisting device 1 of this embodiment is attached to the lower surface of a door closer 4 attached over a door 2 and a wall 3 that supports the door 2 so as to be opened and closed. . The door 2 is supported on the wall 3 via a hinge 5 so as to be able to rotate forward and backward, and is opened and closed by the forward and reverse rotation. The door 2 is provided with a knob 8 on each of the indoor 6 and outdoor 7 sides. When the knob 8 is rotated, a latch (not shown) is pulled out from the wall 3 side and unlocked so that the door 2 can be opened. .

  The door opening assist device 1 of this embodiment is attached to and operated by a commonly used door closer 4 to urge the door 2 to rotate in the opening direction. The door closer 4 will be described with reference to FIG. To do.

  The door closer 4 includes a box-like closer body 4a fixed to the door 2, and two arms 4b and 4c whose both ends are pivotally connected to the closer body 4a and the wall 3 and whose intermediate portions are pivotally connected. And. A piston 4d that reciprocates and a coil spring 4e that urges the piston 4d to move in the closing direction of the door 2 are disposed inside the closer body 4a. A pinion 9 is attached to the closer body 4a so that the shaft end portion penetrates in the thickness direction. The pinion 9 meshes with a transmission member (not shown) formed in the piston 4d. Accordingly, when the piston 4d reciprocates as the door 2 opens and closes, the pinion 9 rotates in the forward and reverse directions. In this case, when the door 2 is opened and operated via the knob 8 or the like, the piston 4d moves in one direction and compresses the coil spring 4e, so that the opening force in the door closing direction is stored in the coil spring 4e. Thereby, the door closer 4 acts so that the door 2 is automatically closed.

  A shaft end portion 9a of the pinion 9 has a non-circular cross section such as a quadrangular cross section, and a part thereof is extracted from the closer body 4a. The door opening auxiliary device 1 is used in a connected state with the shaft end portion 9a of the pinion 9 extracted from the closer body 4a.

  The door opening assist device 1 of this embodiment includes a passive member 20, a pair of transmission members 30 and 31, an opening spring 51 that stores torque in the door opening direction, an action member 50, and a lock including a lock ball 46. A mechanism, a lock release mechanism including the lock release member 44, and a case 10 that houses these mechanisms by covering them are provided.

  As shown in FIGS. 4 and 5, the passive member 20 is rotatably fitted in a hole 10 a formed in the upper part of the case 10 at the upper end and in a recessed hole 21 a formed in the lid 21 at the lower end. Yes. The passive member 20 has a fitting hole 20a having a non-circular cross-sectional shape such as a square cross-sectional shape corresponding to the outer shape of the shaft end portion 9a of the pinion 9 extracted from the closer body 4a at the upper end portion. By inserting the shaft end portion 9a of 9 into the fitting hole 20a, the shaft end portion 9a is coaxially connected to the pinion 9, and rotates integrally with the rotation of the pinion 9. A lid 21 is fixed to the lower surface of the case 10 with a screw 22, and the lid 21 prevents the passive member 20 from being pulled downward from the pinion 9.

  The case 10 is attached to the door closer 4 while being in contact with the closer body 4 a of the door closer 4 so that the passive member 20 is connected to the pinion 9 of the door closer 4, and is fixed by screws 11. Accordingly, the door opening assist device 1 is disposed on the door 2 in a state of being integrated with the door closer 4.

  As shown in FIGS. 5 to 7 and the like, the pair of transmission members 30 and 31 is a pair of holes 10b formed in parallel with the longitudinal direction of the case 10 so as to be opposed to both sides of the passive member 20. 10c is slidably accommodated in each. Engaging portions 30 a and 31 a are formed on the surfaces of the pair of transmission members 30 and 31 on the passive member 20 side, and the engaging portions 30 a and 31 a are engaged with the passive member 20. Here, the passive member 20 can be configured as a pinion gear, and the transmission members 30 and 31 can be configured as a rack. Thereby, the reliability of the driving force transmission between the passive member 20 and the transmission members 30 and 31 is high, and a simple and compact door opening auxiliary device can be configured.

  The passive member 20 includes a pair of engagement members 30a and 31a that are engaged with the engagement portions 30a and 31a. Part gears 20b and 20c. The reason why the partial gears 20b and 20c are formed will be described in detail later. The partial gear 20b and the transmission member 30 of the passive member 20 are rotated by halfway in a predetermined angle region when the door 2 is opened. When the transmission member 30 moves with the meshing portion 30a, the release spring 51 finishes applying the opening force, and the partial gear 20c of the passive member 20 and the transmission member 31 mesh with each other by the rotation up to the entire predetermined angle region. This is because the release spring 51 accumulates the opening force due to the movement of the transmission member 31 accompanying the engagement with the portion 31a, and the lock ball 46 locks the movement of the action member 50 simultaneously with the completion of the opening force accumulation.

  Accordingly, the transmission members 30 and 31 reciprocate relatively in the linear direction by the rotation of the passive member 20, while the passive member 20 rotates by the relative movement in the reciprocation direction of the transmission members 30 and 31. Hereinafter, when it is necessary to classify, the upper transmission member shown in FIGS. 5 to 7 and FIGS. 9 to 17 is referred to as the first transmission member 30, and the lower transmission member is referred to as the second transmission member 31. explain.

The case 10 is further formed with a hollow 10e having a non-circular cross-sectional shape from one side to the other side and a concave hole 10d at the center of the inner end face of the cavity 10e.
A block 49 is fitted into the open end of the cavity 10e, and is fixed by, for example, a pin 60 or the like.

  One end is formed on the inner surface of the block 49 so that the cylindrical guide tube 40 extends integrally from the one side (left side in the figure) inside the cavity 10e of the case 10 toward the other side (right side in the figure). The other end is fixed by being inserted into the concave hole 10d on the inner end face of the cavity 10e while being extrapolated to the convex portion 49a. The guide tube 40 functions as a fixing member and holds a lock ball 46 described later. A stepped stopper portion 40 e is formed on the intermediate outer peripheral portion in the length direction of the guide tube 40 by increasing the outer diameter on the other end side. Further, a long hole 40d through which a release bar 41 fixed to a sliding piece 42, which is a constituent member of an unlocking mechanism described later, passes is formed in the intermediate portion on the other end side of the guide tube 40.

  The open spring 51 is a coil spring whose both ends are free ends, and is a guide in the case 10 so as to be positioned on the convex portion 49a side of the block 49 on one side in the linear movement direction of the transmission members 30 and 31. Extrapolated to the tube 40.

  The action member 50 is disposed between the release spring 51 in the cavity 10e of the case 10 and the transmission members 30 and 31, and is slidably fitted to the guide tube 40. One end of 51 abuts, and the transmission members 30 and 31 can abut on the other end surface. As a result, the action member 50 receives the biasing force of the opening spring 51 and moves in the direction opposite to the biasing direction of the opening spring 51 so that the opening spring 51 stores the opening force for generating the door opening force. Works. In addition, a moving force acts between the action member 50 and the transmission members 30 and 31. In the central portion of the other end surface of the action member 50, a concave hole-shaped engagement portion 50b is formed to engage the stopper portion 40e of the guide tube 40 and the lock ball 46.

  The lock ball 46 is held in a ball holding hole 40 c formed in the guide cylinder 40 and can move in the radial direction of the guide cylinder 40. In this case, a plurality (preferably three or more) of the lock balls 46 are held in the ball holding hole 40c.

  When the door 2 is opened and operated, the lock ball 46 moves to the outer peripheral surface side of the guide cylinder 40 and engages with the engaging portion 50b of the action member 50, thereby locking the movement of the action member 50. Act on. And since the movement of the action member 50 is locked in this way, the extension of the opening spring 51 is prevented, so that the opening spring 51 is locked in the door opening force storage state.

  The action member 50 is processed to push the lock ball 46 into the ball holding hole 40 c of the guide tube 40. For example, an arc portion (not shown) is formed in the shoulder portion of the engaging portion 50b of the action member 50, or a slope portion (not shown) is formed in the engaging portion 50b. It can be easily extruded in 40 directions.

  The lock release member 44 is slidably inserted into the inner surface 40 a in the guide tube 40. A piston portion 44a having an enlarged diameter is formed at one end portion (block 49 side) of the unlocking member 44. The inner diameter of the piston portion 44a is increased at one end portion side (block 49 side) of the guide tube 40. The inner surface 40b is slidably inserted.

  Further, a small diameter shaft portion 44b having a reduced diameter is provided at an intermediate portion on the other end side (transmission members 30 and 31 side) of the unlocking member 44, and a tapered portion is provided on one end side (block 49 side) of the small diameter shaft portion 44b. 44c is formed.

  Between the piston part 44a of the unlocking member 44 and the convex part 49a of the block 49, a lock spring 45 that urges the unlocking member 44 in the direction of the transmission members 30 and 31 is disposed.

  The guide cylinder 40, the lock release member 44, the lock spring 45, the lock ball 46, and the like described above are components of the lock mechanism.

  The hollow portion of the inner surface 40b of the guide cylinder 40 is sealed by O-rings 47 and 48 fixed in concave grooves respectively provided on the inner surface 40a of the guide cylinder 40 and the outer peripheral surface of the convex portion 49a of the block 49, and has an appropriate viscosity. Filled with oil.

  A narrow channel that communicates between the inside of the hollow portion of the inner surface 40b of the guide tube 40 and the piston portion is provided. Although this narrow flow path is mentioned later, it is for ensuring the damper function which slows the moving speed of the lock release member 44 by providing the flow resistance of the oil accompanying the movement of the piston part 44a. As the narrow channel, an appropriate gap may be provided between the inner surface 40b of the guide tube 40 and the outer peripheral surface of the piston portion 44a. In this embodiment, an orifice 44e is formed in the piston portion 44a of the lock release member 44. ing.

  As described above, the hollow portion of the inner surface 40b of the guide tube 40, the oil filled in the hollow portion, the inner surface 40b of the guide tube 40, the piston portion 44a of the unlocking member 44, and the inner surface 40b of the guide tube 40 and the piston portion are provided. The narrow flow path or the orifice 44e is a constituent element of a damper mechanism for slowing the moving speed of the unlocking member 44.

  In addition, a sliding piece 42 is slidably inserted into the inner surface 40a in the other end side (transmission member 30, 31 side) of the guide tube 40.

  A release bar 41 extending in the upward direction in the figure is suspended from an intermediate portion of the sliding piece 42, and the release bar 41 passes through the lateral hole 40 d of the guide tube 40.

  Between the sliding piece 42 and the unlocking member 44, an unlocking spring 43 that urges both of them in a repelling direction is sandwiched.

  The first transmission member 30 has an engagement groove 30b for moving the release bar 41 of the sliding piece 42 within a certain range so as to extend from one end (the working member 50 side) to the other side (the left side in the drawing). It is installed. Therefore, as shown in FIG. 6, the release bar 41 has a shape in which the tip portion is bent corresponding to the eccentricity of the first transmission member 30 with respect to the sliding piece 42.

  The release bar 41, the sliding piece 42, the lock release spring 43, the lock release member 44, and the like described above are components of the lock release mechanism.

  Further, the locking mechanism and the unlocking mechanism, and the unlocking mechanism and the damper mechanism perform a joint action in association with each other, which will be described later, so that the movement of the acting member by the locking mechanism is delayed after the door 2 is fully closed. It is also a component of a lock release delay mechanism that releases the lock.

  Next, the operation of this embodiment will be described in order with reference to FIGS. 9 to 17 are sectional views taken along the line DD of FIG.

  FIG. 9 shows a state where the door 2 is fully closed and the door opening assist device 1 urges the door 2 in the opening direction. In this state, the inner end face of the engagement groove 30b of the first transmission member 30 is engaged (contacted) with the release bar 41, and the sliding piece 42 is retracted to the right side in the figure. At this time, since the biasing force of the unlocking spring 43 is stronger than the biasing force of the lock spring 45, the unlocking member 44 is pressed by the biasing force of the unlocking spring 43 pressed against the sliding piece 42. It is retreating. As a result, the lock ball 46 enters the ball holding hole 40 c so as to come into contact with the small-diameter shaft portion 44 b of the lock release member 44, so that the action member 50 is in a free state, that is, a lock release state. In response to the force, the first transmission member 30 is pressed in the left door opening direction (in the direction of arrow G in FIG. 10 described later). Accordingly, the passive member 20 is biased by the first transmission member 30 so as to rotate in the counterclockwise direction (the direction of arrow F in FIG. 10 described later), which is the direction in which the door 2 is opened. In this state, the door 2 receives a force in the opening direction, but is kept in a fully closed state because it is locked by a latch (not shown).

  FIG. 10 shows a state in which the knob 8 is turned to release the locking of the door 2 and the door 2 is opened from the fully closed position within the door opening assisting area described below. As shown in FIG. 9 described above, since the action member 50 is in a free state (unlocked state) and receives the biasing force of the opening spring 51, the action member 50 is released when the door 2 is unlocked. The first transmission member 30 is moved in the arrow G direction. As described above, when the door 2 is opened, the passive member 20 connected to the pinion shaft 9 of the closer 4 rotates in the direction of arrow F, so that the door 2 is connected via the pinion 9 of the door closer 4 connected to the passive member 20. Is biased in the opening direction. Thereby, the operation force at the time of the opening of the door 2 can be reduced, and door opening operation becomes easy. As described above, when the door 2 is initially opened, the first gear associated with the engagement of the partial gear 20b of the passive member 20 and the transmission member 30a of the first transmission member 30 due to the rotation to the middle of a predetermined angle region described later. A region where the opening spring 51 applies an opening force by the movement of the transmission member 30 is referred to as a door opening assist region.

  As the passive member 20 rotates in the direction of arrow F, the first and second transmission members 30 and 31 meshing with the partial gears 20b and 20c of the passive member 20 move in the G and H directions, respectively. Due to the movement of the first transmission member 30 in the G direction, the release bar 41 and the sliding piece 42 follow the movement of the first transmission member 30 by the urging force of the lock release spring 43, and the elongated hole of the guide cylinder 40. It moves to the left in the figure until it contacts the end face of 40d. As the sliding piece 42 moves, the unlocking spring 43 expands and its urging force gradually becomes weaker than the urging force of the locking spring 45. However, the action member 50 moves in the G direction of the first transmission member. The lock ball 46 is pressed down by the inner surface 50a because it moves to the left with the movement, and the lock ball 46 does not protrude from the ball holding hole 40c of the guide tube 40 and receives the biasing force of the release spring 51. The acting member 50 is smoothly moved leftward while pressing the first transmission member 30 in the G direction.

  Thus, the first transmission accompanying the meshing of the partial gear 20b of the passive member 20 and the meshing portion 30a of the first transmission member 30 due to the rotation to the middle of the predetermined angle region at the time when the door 2 is opened. The movement of the member 30 is performed, and the opening spring 51 finishes the operation of applying the door opening force. About half of the predetermined angle area of the door 2 is set to the opening angle (that is, the door opening auxiliary area).

  FIG. 11 is a state following FIG. 10 and shows a switching state in which the door 2 is opened to the end position of the door opening auxiliary region and the opening force of the opening spring 51 starts to be accumulated. The action member 50 further moves to the left and stops at the stepped stopper portion 40e of the guide tube 40. The opening operation of the door 2 causes the passive member 20 to rotate in the direction of arrow F via the pinion 9 of the door closer 4, so that the first and second transmission members 30 and 31 move in the G and H directions, respectively. The first transmission member 30 moves away from the action member 50, and the second transmission member 31 moves in the direction of the action member 50 to contact the action member 50 and move the action member 50 to the right. Along with the movement of the action member 50, the release spring 51 is compressed by moving it in the direction opposite to the urging direction of the action member 50 (right direction in the figure), and the opening force is stored in the direction to open the door 2. start.

  FIG. 12 shows a state where the opening force of the opening spring 51 has been stored. The rotation of the pinion 9 of the closer 4 and the passive member 20 connected thereto in the F direction causes the second transmission member 31 to move in the H direction and push the action member 50 back to the original position in the right direction. The operation of storing the opening force ends. At this time, the door 2 is at the end point of a region of a predetermined angle at the beginning of opening, and the predetermined angle is set to an angle at which a person cannot go in and out.

  Thus, by setting the area of the predetermined angle at the beginning of the opening of the door 2 to an angle at which a person cannot enter and exit, the opening spring 51 opens the door in the door opening auxiliary area up to about half of the fixed angle. The opening force can be applied to the door 2 to lightly open it, and then the opening force can be stored by opening the door to the end point of the continuous region at a predetermined angle. In other words, the two operations of the door opening force action and the door opening force storage of the opening spring 51 can be ended continuously before the door is opened until a person can go in and out. For this reason, there is an advantage that there is no malfunction such as failure to store the opening force of the opening spring 51 even when the door 2 is closed again while the door 2 is once opened and then not fully opened.

  FIG. 13A is a state where the opening spring 51 is locked in a state where the opening force accumulation is completed, and FIG. 13B is a state where the first transmission member 30 and one partial gear 20b of the passive member 20 are engaged at that time. The state (c) shows the meshing state of the second transmission member 31 and the other partial gear 20c of the passive member 20 at that time. When the action member 50 moves backward in the right direction and returns to the original position, the urging force of the lock release spring 43 is already weaker than the urging force of the lock spring 45 in the state of FIG. As a result, the holding action of the lock ball 46 in the ball holding hole 40 c due to the pressing is canceled, and at the same time, the lock release member 44 moves to the left by the urging force of the lock spring 45. Due to the movement of the unlocking member 44 in the left direction, the lock ball 46 is pushed out from the ball holding hole 40c of the guide tube 40 to the outer peripheral surface of the unlocking member 44 and is engaged with the engaging portion 50b of the action member 50. The movement of the action member 50 in the left direction is locked, and the release spring 51 is locked in a state where the release force is stored.

  Therefore, in this embodiment, an opening force that biases the door 2 in the opening direction in an angle range of about the latter half of the predetermined angle region at the beginning of the opening of the door 2 with the opening operation of the door 2 is applied to the opening spring 51. It can be stored.

  14A is a state where the door 2 is further opened from the state of FIG. 13, and FIG. 14B is a state where the first transmission member 30 and one partial gear 20b of the passive member 20 are meshed at that time. (C) shows the meshing separation state between the second transmission member 31 and the other partial gear 20c of the passive member 20 at that time. The partial gears 20b and 20c of the passive member 20 meshing with the first and second transmission members 30 and 31 rotate to the final position of the meshing portion (corresponding to the final position of the predetermined angle when the door is opened), and thereafter Even if the door 2 is opened and the passive member 20 rotates in the F direction, the first and second transmission members 30 and 31 do not move and remain stationary. Therefore, no resistance other than the acting force of the door closer 4 is added to the door 2 even if the door 2 is opened after the final position of the predetermined angle in which the door opening torque is stored.

  FIG. 15 shows a state in which the door 2 is closed to the point before full closing. The closing operation of the door 2 is automatically performed by the biasing force of the coil spring 4 e of the door closer 4, and the pinion 9 rotates in the closing direction of the door 2. Thereby, the passive member 20 rotates in the direction of arrow I in synchronization with the pinion 9 of the door closer 4. As the passive member 20 rotates in the direction of arrow I, the first and second transmission members 30 and 31 move in the directions of arrows J and K, respectively. As the first transmission member 30 moves in the J direction, the left end surface of the engagement groove 30b of the first transmission member 30 comes into contact with the release bar 41, and the release bar 41 and the sliding piece 42 for fixing the release bar 41 are moved to the right. By moving in the direction, the unlocking spring 43 is compressed.

  FIG. 16 shows a state immediately before the lock mechanism starts to be unlocked at the moment when the door 2 is fully closed. One end (right side) end face of the first transmission member 30 is in contact with the action member 50. At the same time, the unlocking spring 43 is compressed to the maximum by the sliding piece 42 and has a stronger urging force than the locking spring 45. The unlocking member 44 is pressed by the unlocking spring 43 and moves rightward. At this time, the hollow portion 40b of the inner surface 40b of the guide cylinder 40 is filled with viscous oil, so that the oil flow resistance of the orifice 44a is increased. Since the damper effect is produced by the action, the unlocking member 44 moves in a slow state. Accordingly, in the state at the moment when the door 2 is fully closed, the operation of releasing the lock of the lock mechanism is started, but the action member 50 is still engaged with the lock ball 46 in contact with the engaging portion 50b of the action member 50. It is locked in the combined state. That is, at the same time as the door 2 is fully closed, the lock delay function by the lock release delay mechanism including the lock mechanism, the lock release mechanism, and the damper mechanism, which perform such a joint action, acts.

  FIG. 17 shows a state following FIG. 16 and shows a state where the lock mechanism is unlocked after the door 2 is fully closed. As the lock release member 44 continues to move in the right direction, the lock ball 46 falls to the small diameter shaft portion 44b of the lock release member 44 at the lock release position, and enters the lock release state to return to the state shown in FIG. Since the unlocking operation accompanying the movement of the unlocking member 44 in the right direction is gently performed by the damper effect, there is a time difference between the fully closing and unlocking of the door 2, and the door 2 is fully closed and locked. Until it is unlocked. That is, since the lock of the movement of the action member 50 by the lock ball 46 continues until the door 2 is fully closed and locked, the release spring 51 remains in a state where the release force is accumulated. The opening force in the direction of opening 2 does not act. This locked state is released with a delay when the door 2 is completely closed, and the lock is released only after the transition to the state of FIG. 9 and the door 2 is biased in the opening direction. As a result, at the instant when the door 2 is fully closed, the resistance force in the door opening direction is not yet generated, so that the door 2 can be reliably locked.

  In such an embodiment, since the door 2 is always urged in the opening direction when the door 2 is closed, the operating force at the time of opening the door can be reduced by releasing the lock. In addition, since the operation force reduction action is automatically performed only when the door 2 is completely closed, it is not necessary to operate other members to reduce the operation force as in the conventional case, and the operability is improved. Furthermore, since the case 10 is attached to the door closer 4, it is not necessary to arrange the door opening assisting device 1 at other portions of the door 2 and the wall 3. For this reason, it does not become intrusive and does not stand out, and it can prevent the appearance of the door from being deteriorated.

  In this embodiment, the pair of partial gears 20b and 20c of the passive member 20 are illustrated in the same size, and the gear ratio with the first and second transmission members 30 and 31 can be regarded as the same. However, in particular, the operating force for opening the door when storing the door opening force by increasing the gear ratio with the second transmission member 31 such as forming the other partial gear 20c to be smaller in diameter than the one partial gear 20b. Can be set small.

  18 to 23 show a door opening assist device 1A according to a second embodiment of the present invention, in which the same members as those in the first embodiment described above are assigned the same reference numerals and correspond to each other. .

  In this embodiment, as shown in FIGS. 19 and 20, the first cam surface 201 and the second cam surface 202 are formed on the passive member 20 connected to the pinion 9 of the door closer 4 so that the first cam The first transmission member 30 is in contact with the surface 201 and the second transmission member 31 is in contact with the second cam surface 202. As shown in FIG. 23, these transmission members 30 and 31 are arranged at orthogonal positions around the guide tube 40 inserted into the case 10 and linearly reciprocate within the case 10 independently of each other. Moving.

  Also in this embodiment, a guide cylinder 40 as a fixing member is inserted and arranged in the case 10, and a sliding piece 42, an unlocking spring 43, an unlocking member 44, and a locking spring are disposed in the guide cylinder 40. 45 is arranged along the length direction. Further, an action member 50 is extrapolated to the guide tube 40, and an open spring 51 is disposed outside the action member 50. Further, a lock ball 46 that is engaged and disengaged from the action member 50 by sliding of the lock release member 44 is provided. These sliding piece 42, lock release spring 43, lock release member 44, lock spring 45, action member 50, release spring 51, and lock ball 46 are the same as those in the first embodiment shown in FIGS. The description will be omitted. In addition, oil is sealed in the cavity of the unlocking member 44, and a narrow flow path is formed between the cavity and the piston part 44a to constitute a damper mechanism.

  As shown in FIG. 19, the first cam surface 201 in the passive member 20 is formed in an arc surface formed at a position radially away from the rotation center of the passive member 20. The first cam surface 201 receives the movement of the first transmission member 30 which is moved when the door 2 is opened, thereby receiving the movement of the first transmission member 30. Since the opening force stored in 51 moves leftward, the operation force at the time of opening the door is reduced by rotating the passive member 20 in the door opening direction (arrow X direction in FIGS. 19 and 20). Is possible. The first transmission member 30 moves by being pressed by the action member 50. However, when the action member 50 comes into contact with the presser plate 7 in the case 10 and stops, the first transmission member 30 stops without moving any more. On the other hand, by continuing the opening operation of the door 2, the passive member 20 rotates in the opening direction (X direction) of the door 2.

  As shown in FIG. 20, the second cam surface 202 is formed by a circular surface 202a of the outer shape of the passive member 20, and a concave surface 202b in which the circular surface 202a is partially recessed. The concave surface 202b has an arc-shaped connection surface 202c connected to the circular surface 202a. The connection surface 202c contacts the second transmission member 31 when the first transmission member 30 moves to the maximum, and the passive member 20 rotates in the door opening direction (X direction) in this contact state. Then, the second transmission member 31 is moved in the pushing direction (the right direction in FIG. 20). Note that the distal end portion of the second transmission member 31 is formed in an arc shape in order to smoothly slide by contact with the second cam surface 202.

  As shown in FIGS. 18 and 20, a return spring 70 is disposed between the case 10 and the end of the second transmission member 31 on the side opposite to the passive member 20, and is prevented from falling off by the spring pressing plate 71. ing. The return spring 70 biases the second transmission member 31 in a direction in which the second transmission member 31 comes into contact with the second cam surface 202.

  Even in the above structure, when the door 2 is in the fully closed state, the action member 50 is biased by the release spring 51 and is in the unlocked state. It moves to (door opening direction), and the 1st transmission member 30 is moved to the same direction. Since the first transmission member 30 presses the first cam surface 201, the passive member 20 rotates in the door opening direction (arrow X direction). For this reason, the door 2 at the beginning of opening (door opening auxiliary region) can be opened with a light force.

  The action member 50 comes into contact with the case 10, and the first transmission member 30 stops at the position where the action member 50 has moved to the maximum. At the same time, the concave surface 202 b of the second cam surface 202 of the passive member 20 contacts the second transmission member 31. Furthermore, by continuing the opening operation of the door 2, the connection surface 202c in the second cam surface 202 reaches the second transmission member 31 and moves the member 31 in the right direction. Thereby, since the action member 50 moves rightward and compresses the opening spring 51, the opening spring 51 accumulate | stores opening force. The subsequent operation until the opening spring 51 stores the opening force and is completed is the same as in the first embodiment. When the lock ball 46 enters and engages, the action member 50 is locked and the opening spring 51 opens. Locked in the power reserve state. Therefore, also in this embodiment, with the opening operation of the door 2, the opening spring 51 applies an opening force that urges the door 2 in the opening direction within an angle range of the latter half of the predetermined angle region at the beginning of the opening of the door 2. Can be stored.

  Further, when the door 2 is opened until a person can go in and out, the second cam surface 202 of the passive member 20 rotates with the circular surface 202 a in contact with the second transmission member 31. The transmission member 31 does not move any further. Accordingly, after the final position of the predetermined angle in which the opening force of the door 2 is stored, even if the door 2 is opened, no resistance is added to the door 2 other than the acting force of the door closer 4.

  Thereafter, the closing operation in which the door 2 is closed to the position before full closing is automatically performed by the urging force of the coil spring 4 e of the door closer 4, and the pinion 9 rotates in the closing direction of the door 2. Thereby, the passive member 20 rotates in the direction opposite to the arrow X direction. In this rotation, since the first transmission member 30 is pushed by the first cam surface 201, the first transmission member 30 moves in the right direction, and the sliding piece 42 moves in the same direction while compressing the lock release spring 43. 44 moves in the same direction, and by this movement, the lock ball 46 is disengaged from the action member 50, and the action member 50 is unlocked. The operation at this time is also the same as in the first embodiment. Further, the unlocking is performed after the door 2 is fully closed by the damper mechanism, and this operation is also the same as in the first embodiment. As described above, when the door 2 is fully closed, the action member 50 is urged to move in the opening direction of the door 2 by the opening spring 51 that stores the opening force. Assistance is possible.

  As described above, also in this embodiment, the operation force at the initial opening of the door 2 can be reduced, and the operation force reduction action is automatically performed only when the door 2 is fully closed. There is no need to operate other members to reduce the force, improving operability. Further, since the case 10 is attached to the door closer 4, it is not necessary to place the door opening auxiliary device 1 </ b> A at other portions of the door 2 and the wall 3, and it does not obstruct access and does not stand out, and the appearance of the door is degraded. Can be prevented. In particular, in this embodiment, the first and second transmission members 30 and 31 and the passive member 20 are operated by simply abutting each other via the cam surface, and the biting of the first embodiment is performed. Compared to the gear that performs the operation, there is an advantage that the operation members 30 and 31 can be switched and the reliable operation at the beginning of the stop can be ensured.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, the case 10 is attached to the door closer 4 to assist in opening the door, but the case 10 is omitted, and the pair of transmission members 30 and 31, the opening spring 51, the action member 50, and other components are placed in the door closer 4. Can be integrated into the unit. Thereby, since the door opening auxiliary device can be attached to the door 2 at the same time as the door closer 4 is attached, it can be easily attached.

  The door opening assist device of the above invention has a simple structure that does not require an operation member other than a door opening / closing knob, an expensive electromagnetic control system, an electric drive mechanism, etc., as in the conventional door opening assist mechanism, and is economical. The structure is also excellent in performance. Moreover, by using two partial gears that separate the passive members that mesh with the pair of transmission members, the door opening force generation of the opening spring and the opening force storage before the door can be opened until a person can enter and exit. The operation can be terminated continuously. Furthermore, after the door is fully closed by the lock release delay mechanism, the lock held in the door opening force accumulation state is released later, and the door opening force can be applied after the door is closed and completely locked. As a result, it operates in synchronization with the opening operation of the door, and the reliability and operability of the opening and closing operation of the door can be remarkably improved, and it is compact and inconspicuous, and prevents the appearance of the door from being deteriorated. Therefore, it is possible to provide a door opening assist device. In addition, the door opening assist device of the present invention can be retrofitted to a standard door closer by a slight process such as connecting a passive member and a case, or can be integrated with the door closer. Therefore, it can be favorably applied to doors of new buildings and existing high-sealing buildings such as condominiums and buildings.

It is the front view which looked at the door provided with the door opening auxiliary | assistance apparatus by the 1st Embodiment of this invention from the room inner side. It is a side view of FIG. It is a top view of FIG. It is the sectional view on the AA line of FIG. It is B arrow sectional drawing of FIG. It is C arrow sectional drawing of FIG. It is the DD sectional view taken on the line of FIG. It is the E section enlarged view of FIG. It is sectional drawing which shows the state which urges | biases a door in an opening direction by a door opening auxiliary | assistance apparatus in the state in which a door is fully closed. It is sectional drawing which shows the state which has opened the door in the door opening auxiliary | assistant area | region from fully closed. It is sectional drawing which shows the switching state which begins to accumulate | store the opening force of an opening spring in the state which opened the door to the end position of the door opening assistance area | region. It is sectional drawing which shows the open force storage completion state of an open spring. (A) is sectional drawing which shows the state locked in the open force storage completion state of an open spring, (b) shows the meshing state of the 1st transmission member and one partial gear of a passive member at the time Explanatory drawing, (c) is explanatory drawing which shows the meshing state of the other partial gear of the 2nd transmission member and a passive member at the time. (A) is sectional drawing which shows the state in the middle of the further opening of the door from the state of FIG. 13, (b) is the meshing disengagement state of the 1st transmission member and one partial gear of a passive member in the time (C) is explanatory drawing which shows the meshing separation state of the 2nd transmission member and the other partial gear of a passive member at the time. It is sectional drawing which shows the state by which the door was closed to the fully closed dimension. FIG. 6 is a cross-sectional view showing a state just before the lock mechanism starts to be unlocked at the moment when the door is fully closed. It is sectional drawing which shows the state by which the lock | rock of the locking mechanism was cancelled | released late after the door was fully closed. It is sectional drawing of 2nd Embodiment of this invention. It is the HH sectional view taken on the line in FIG. It is the II sectional view taken on the line in FIG. It is CC sectional view taken on the line in FIG. It is the KK sectional view taken on the line in FIG. It is the LL sectional view taken on the line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Door opening auxiliary | assistance apparatus 2 Door 4 Door closer 9 Pinion 10 Case 20 Passive member 20b, 20c Partial gear 30 1st transmission member 31 2nd transmission member 40 Guide cylinder (fixing member)
43 Unlocking spring 44 Unlocking member 44a Piston part 44e Orifice (narrow channel)
45 lock spring 46 lock ball 50 action member 51 release spring 201 first cam surface 202 second cam surface

Claims (12)

The passive member connected to the door closer that biases the door in the closing direction rotates forward and backward as the door opens and closes, and this rotation causes the transmission member to reciprocate in the direction corresponding to the opening and closing of the door. With the structure, the release spring urges the transmission member to move in the door opening direction, and stores the opening force by the movement of the transmission member, and is then locked in the opening force storage state.
The opening of the door is characterized in that the opening spring exerts an opening force by rotation of the passive member within a predetermined angle region at the beginning of opening the door, and the opening spring stores the opening force and is locked in the opening force storage state. Auxiliary device. A passive member that is connected to a door closer that urges the door to rotate in the closing direction, and that rotates forward and backward as the door is opened and closed;
A transmission member that reciprocates in a direction corresponding to the opening and closing of the door in a state of meshing with the passive member;
An opening spring that urges the transmission member to move in the door opening direction as the door opens, and stores opening force in the door opening direction by movement of the transmission member;
A locking mechanism that locks the opening spring in the opening force storage state by opening the door;
An unlocking member that unlocks the lock mechanism by closing the door;
In the passive member, a meshing portion is formed on a part of the outer peripheral surface, and the opening spring exerts an opening force by rotation within a predetermined angle region at the time when the door is opened, and the opening force is continuously stored and the opening force is stored. The door opening assist device, wherein the meshing portion meshes with a transmission member so as to be locked. A passive member that is connected to a door closer that urges the door to rotate in the closing direction, and that rotates forward and backward as the door is opened and closed;
A transmission member that reciprocates in a direction corresponding to the opening and closing of the door in a state of meshing with the passive member;
An opening spring that urges the transmission member to move in the door opening direction as the door opens, and stores opening force in the door opening direction by movement of the transmission member;
A fixed member extending along the direction of movement of the transmission member in a fixed state at a fixed position;
An actuating member disposed between the open spring and the transmission member so as to receive an urging force of the open spring and to move along the fixed member by the movement force acting between the transmission member and the transmission member;
A lock mechanism that is held by a fixed member and has a lock ball that locks the movement of the acting member by opening the door and locks the open spring in the open force storage state;
A lock release member for releasing the movement lock of the action member by the lock ball with the closing operation of the door,
In the passive member, a meshing portion is formed on a part of the outer peripheral surface, and the opening spring exerts an opening force by rotation within a predetermined angle region at the time when the door is opened, and the opening force is continuously stored and the opening force is stored. The door opening assist device, wherein the meshing portion meshes with a transmission member so as to be locked. A passive member that is connected to a door closer that urges the door to rotate in the closing direction, and that rotates forward and backward as the door is opened and closed;
A transmission member that can come into contact with the passive member and reciprocates in a direction according to the opening and closing of the door as the passive member rotates;
An opening spring that biases the transmission member so as to move in the door opening direction as the door opens, and stores an opening force in the door opening direction by movement of the transmission member;
A locking mechanism that locks the opening spring in the opening force storage state by opening the door;
An unlocking member that unlocks the lock mechanism by closing the door;
A cam surface against which the transmission member abuts is formed on the passive member, and the cam spring causes the opening spring to act upon the rotation within a predetermined angle region of the passive member when the door is opened, and the opening spring The door opening auxiliary device is characterized in that the door opening force is stored so that the door is locked in the opening force storage state. A passive member that is connected to a door closer that urges the door to rotate in the closing direction, and that rotates forward and backward as the door is opened and closed;
A transmission member that can come into contact with the passive member and reciprocates in a direction according to the opening and closing of the door as the passive member rotates;
An opening spring that biases the transmission member so as to move in the door opening direction as the door opens, and stores an opening force in the door opening direction by movement of the transmission member;
A fixed member extending along the direction of movement of the transmission member in a fixed state at a fixed position;
An actuating member disposed between the open spring and the transmission member so as to receive a biasing force of the open spring and to move along the fixed member by the movement force acting between the transmission member and the transmission member;
A locking mechanism that is held by the fixing member and has a lock ball that locks the movement of the action member by the opening operation of the door and locks the opening spring in the opening force storage state;
A lock release member for releasing the movement lock of the action member by the lock ball with the closing operation of the door,
A cam surface against which the transmission member abuts is formed on the passive member, and the cam spring causes the opening spring to act upon the rotation within a predetermined angle region of the passive member when the door is opened, and the opening spring The door opening auxiliary device is characterized in that the door opening force is stored so that the door is locked in the opening force storage state.   The lock release delay mechanism for releasing the movement lock of the action member by the lock mechanism after the door is fully closed is provided between the lock mechanism and the lock release member. The door opening assistance apparatus of any one of -5. The unlock delay mechanism is
A lock spring for urging the unlocking member in the locking direction;
An unlocking spring that biases the unlocking member in a direction opposite to the biasing direction of the lock spring;
The door opening assist device according to claim 6, further comprising a damper mechanism provided at one side of the lock release member and configured to slow down the reciprocating movement of the lock release member. The damper mechanism is
A cylindrical cavity extending along one side of the unlocking member and filled with oil;
A piston part formed at one end of the unlocking member and slidably inserted along the inner wall of the cavity part;
8. The door opening assist device according to claim 7, further comprising a narrow channel communicating between the inside of the hollow portion and the piston portion.   A pair of the transmission members are arranged so as to reciprocate independently, and the meshing portions of the passive members are spaced apart so as to mesh with the respective transmission members. Item 4. The door opening assist device according to Item 2 or 3.   4. The door opening assist device according to claim 2, wherein the passive member is a pinion gear and the transmission member is a rack.   The transmission member includes a first transmission member and a second transmission member that reciprocate independently, and the cam surface moves when the door is opened by the opening force of the opening spring. And a second cam surface for moving the second transmission member in the direction of storing the opening force of the opening spring when the door is opened following the movement of the first transmission member. 6. The door opening assist device according to claim 4, wherein the door opening assist device is provided.   12. The door opening assist device according to claim 11, wherein the second transmission member is urged in a direction in contact with the second cam surface by a return spring.

Images