JP2009052362A - Device for closing door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for closing a door saving a space by reducing the number of parts while stabilizing a working force in the case of an opening and a closing regardless of the angle of opening and closing of the door and improving the efficiency of the opening and closing of the door in the device for closing the door supporting the door for a building by a lower section or the like and automatically closing the opened door. <P>SOLUTION: The device for closing the door has a main shaft as the center or rotation of the door opened and closed to an opening formed to the building, a piston moved in a working chamber with the rotation of the main shaft by opening and closing the door and a spring urged in the direction of the door closing of the door. In the device for closing the door, through-holes passing a working oil when opening and closing the door are formed at the specified places of the piston and the working chamber, the quantity of the working oil passing through the through-holes when closing the door is adjusted and a speed during the closing of the door is adjusted. Such a device for closing the door has an abutting arcuate member fitted at one end section of a spring rod linearly moved by the elastic force of the spring and a follower gear rotated with the revolution of the main shaft. In such a device for closing the door, the follower gear forming an abutting section in a cam shape and the abutting arcuate member are abutted against each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door closing device for automatically closing an opened door by supporting a door of a building at a lower part or the like.

  Conventionally, there is a floor hinge as an example of a door closing device that is used so as to be embedded in a floor surface to support the lower part of a building door.

  The structure of this floor hinge is shown in the sectional view of FIG. In FIG. 16, a main shaft 51 is rotatably attached to one of the floor hinge main bodies 50 embedded in the floor so that the upper portion protrudes from the floor hinge main body 50 and supports the lower portion of the door. A driven gear 53 that rotates about the driven gear shaft 52 is provided.

  A cylinder device having cylinder chambers 50c and 50d arranged in parallel by being partitioned by a partition wall 50e is arranged on the other side of the floor hinge main body 50, and a piston 57 is attached to one cylinder chamber 50c of the cylinder device. A piston rod 55 is slidably inserted into the partition wall 50b, and a projecting portion of the piston rod 55 from the partition wall 50b is connected to one side of the driven gear 53 via a connecting piece 54, and the partition wall 50b. Further, a spring rod 61 that is detachably inserted into the other cylinder chamber 50d is arranged side by side with the piston rod 55, and a protruding portion of the spring rod 61 from the partition wall 50b is further operated via a pressing roller 58 in the driven gear 53. One cylinder chamber 50c is connected to the other side of the driven gear 53 via the operation roller 60 in the lever 59. Includes a first spring 56 that urges the piston 57 in the direction in which the door is closed, and a second spring 62 that urges the spring rod 61 in the direction in which the door is closed in the other cylinder chamber 50d. ing.

  An oil hole 57a through which the hydraulic oil W passes is formed at the center of the piston 57. A spherical valve body 64 is housed in the oil hole 57a, and the cylinder chamber 50c, An adjustment hole 65 for communicating 50d is formed, and a valve 66 for adjusting the passing amount of the hydraulic oil W is provided in the adjustment hole 65.

  According to this configuration, when the door is opened, the main shaft 51 rotates in the clockwise direction A in FIG. 16, and the driven gear 53 rotates in the counterclockwise direction B in FIG. By rotating in the B direction, the piston 57 is pulled in the arrow direction C of FIG. 16 against the elasticity of the first spring 56, and the spring rod 61 is moved via the operation lever 59 by the rotation of the driven gear 53. The second spring 62 is pushed against the elasticity of the second spring 62 in the arrow direction D in FIG.

  At this time, the hydraulic oil W in the cylinder chamber 50c flows from the piston rod 55 side to the filter 63 side through the oil hole 57a when the valve body 64 opens the oil hole 57a.

  When the door is closed, the piston 57 is returned in the direction opposite to the arrow direction C in the figure by the elastic force of the first spring 56, and the spring rod 61 is in the arrow direction D in the figure by the elastic force of the second spring 62. The hydraulic oil W passes through the hydraulic oil passage 50f from the piston 57 side of one cylinder chamber 50c while the flow rate is adjusted by the valve 66, and flows into the cylinder chambers 50c and 50d.

  Then, the flow rate of the hydraulic oil W is adjusted by the valve 66 so that the speed at which the door is closed is adjusted.

  On the other hand, in order to ensure airtightness and sound insulation, rubber packing or the like is performed on the edge of the door. However, in the configuration of the conventional product, the door may not be completely closed against the frictional force with the rubber packing or the like.

Therefore, the applicant has made an invention as shown in Patent Document 1 in which a conventional product is improved in accordance with such a case, and has obtained a patent. According to the invention shown in Patent Document 1, when the door is about to be closed with respect to the opening, the elastic force of the booster spring provided in the booster working chamber is converted into the hydraulic pressure of the hydraulic oil, and this working oil passes through the booster passage hole. From this, it passes through the passage hole to reach the working chamber and is added to the elastic force of the spring member so that the door is securely closed (see, for example, Patent Document 1).
Japanese Patent No. 2977527

However, in the main configuration of the main shaft 51 and the driven gear 53 in the conventional product and Patent Document 1, the rotation of the driven gear 53 through the main shaft 51 when the door is opened and closed is caused by the pressing roller 58 in the driven gear 53 and Through the mechanism of the operation roller 60 in the operation lever 59, the rotational motion is converted into a linear motion, and the force is transmitted to the spring rod 61. Therefore, the number of parts has increased and the overall structure has also increased.
As a result, the mechanical resistance at each part increases, and as a result, the efficiency of the opening / closing force is poor, and as the door opening angle increases, the acting force at the time of opening tends to increase.
Moreover, in patent document 1, although the closing force increase means was provided in the conventional product and the operativity was improved, it was not drastic that the main structure was improved.

  Therefore, the present invention solves such problems, and in the door closing device for automatically closing the opened door by supporting the door of the building at the lower part or the like, the number of parts is reduced. It is an object of the present invention to provide a door closing device that saves space and improves the opening and closing efficiency of the door without stabilizing the opening and closing angle of the door, stabilizing the force during opening and closing.

  In order to solve the above problems, a door closing device according to claim 1 of the present invention includes a main shaft that is a rotation center of a door that opens and closes with respect to an opening provided in a building, and a main shaft that is opened and closed. A piston that moves in the working chamber as it rotates, and a spring that biases the piston in the direction of closing the door, and a passage hole through which the working oil passes when the door opens and closes is provided in the piston and the working chamber. In a door closing device, which is formed at a predetermined position and adjusts the speed during the closing of the door by adjusting the amount of hydraulic oil that passes through the passage hole when the door is closed. An abutting arc member provided at one end of a moving spring rod, a driven gear that rotates as the main shaft rotates, and the driven gear and the abutting arc member in which the abutting portion has a cam shape. It is characterized by contacting.

  The door closing device according to claim 2 of the present invention is the door closing device according to claim 1, wherein the spring rod is slidably installed in the door closing device, and the contact of the driven gear is reduced. A contact portion between the contact portion and the contact arc member is inclined with respect to an axis in the elastic direction of the spring.

According to a third aspect of the present invention, in the door closing device according to the first and second aspects, the door can be opened and closed at the contact portion of the driven gear. The present invention is characterized in that a hollow portion is provided.
(Function)

  In the invention which concerns on the door closing apparatus of Claim 1, The main axis | shaft used as the rotation center of the door opened and closed with respect to the opening provided in the building, The piston which moves a working chamber with rotation of the main axis | shaft by opening and closing of a door, A spring for biasing the piston in the door closing direction, and a passage hole through which the working oil passes when the door opens and closes is formed at a predetermined position of the piston and the working chamber. A contact arc provided at one end of a spring rod that moves linearly by the elastic force of a spring in a door closing device that adjusts the speed of the door during closing by adjusting the amount of hydraulic oil that passes through the passage hole. Since the driven gear that has a member and a driven gear that rotates with the rotation of the main shaft and the contact portion is cam-shaped is brought into contact with the contact arc member, the rotation of the main shaft Open / close force of the door only by the driven gear that rotates It is possible to transfer to the spring through the abutment arc member and spring rod.

  In the door closing device according to claim 2, in the door closing device according to claim 1, the spring rod is slidably installed in the door closing device, and the contact portion in the driven gear and the contact Since the contact portion of the contact arc member is inclined with respect to the axis in the elastic direction of the spring, the spring rod that can be slidable is against the clearance that is provided on both sides in the width direction of the spring rod. The tilting direction of the spring rod can always be made constant.

  In the door closing device according to claim 3, in the door closing device according to claim 1 or 2, the contact portion of the driven gear is provided with a hollow portion that enables opening and closing of the door. Therefore, when the door is opened and the predetermined opening angle is reached, the contact arc member is fitted into the recess of the contact portion of the driven gear.

In the invention which concerns on the door closing apparatus of Claim 1, The main axis | shaft used as the rotation center of the door opened and closed with respect to the opening provided in the building, The piston which moves a working chamber with rotation of the main axis | shaft by opening and closing of a door, A spring for biasing the piston in the door closing direction, and a passage hole through which the working oil passes when the door opens and closes is formed at a predetermined position of the piston and the working chamber. A contact arc provided at one end of a spring rod that moves linearly by the elastic force of a spring in a door closing device that adjusts the speed of the door during closing by adjusting the amount of hydraulic oil that passes through the passage hole. Since the driven gear that has a member and a driven gear that rotates with the rotation of the main shaft and the contact portion is cam-shaped is brought into contact with the contact arc member, the rotation of the main shaft Open / close force of the door only by the driven gear that rotates It is possible to transfer to the spring through the abutment arc member and spring rod.
Therefore, the parts used in the same place in the conventional product can be largely deleted. As a result, the space of the floor hinge body itself can be saved and the cost can be reduced by reducing the number of parts. Further, since the internal structure of the floor hinge main body is simplified as compared with the conventional product, it is less likely to break than the conventional product having a large number of parts, and the production efficiency in assembly can be improved.
Further, by simplifying the internal structure of the floor hinge body by reducing parts and bringing the driven gear and the contact arc member into contact with each other, the mechanical resistance in each part is not increased as in the conventional case. The opening and closing efficiency of the can be improved.

In the door closing device according to claim 2, in the door closing device according to claim 1, the spring rod is slidably installed in the door closing device, and the contact portion in the driven gear and the contact Since the contact portion of the contact arc member is inclined with respect to the axis in the elastic direction of the spring, the spring rod that can be slidable is against the clearance that is provided on both sides in the width direction of the spring rod. The tilting direction of the spring rod can always be made constant.
Therefore, when the door is opened or closed, the impact noise generated between the sliding surface due to vibration caused by fluctuation of the tilting direction of the spring rod with respect to the clearance that the spring rod has on both sides in the width direction. Can be prevented.

In the door closing device according to claim 3, in the door closing device according to claim 1 or 2, the contact portion of the driven gear is provided with a hollow portion that enables opening and closing of the door. Therefore, when the door is opened and the predetermined opening angle is reached, the contact arc member is fitted into the recess of the contact portion of the driven gear.
Therefore, the said recessed part in the said contact part covers a part of circular arc in the said contact arc member, and the said contact arc member is hold | maintained at the said driven gear. As a result, the rotational force of the driven gear and the main shaft by the spring is eliminated, so that the self-closing force of the door is eliminated and the opening and closing of the door is maintained.

  Hereinafter, a door closing device according to an embodiment of the present invention will be described with reference to the drawings.

  A first embodiment of the door closing device according to the present invention will be described with reference to FIGS.

  A floor hinge body 1 according to an embodiment of the present invention is used by being embedded in a floor surface in order to support a lower part of a door that is opened and closed provided in a building. As shown in FIG. 1 is divided into a storage portion 1a and a working chamber 33, and both are filled with hydraulic oil W.

As shown in FIG. 1, a vertical axis main shaft 3 that serves as a rotation center of the door is supported by the storage portion 1 a, and a gear 3 a is formed on the outer periphery of the main shaft 3, adjacent to the main shaft 3. A driven gear 5 having a gear 5 a that meshes with the gear 3 a is rotatably supported via a driven gear shaft 4.
Further, on the side wall of the storage portion 1a, a rotation stopper 1c is provided on the door opening direction side and a rotation stopper 1b is provided on the door closing direction so as to prevent rotation of the gear 5a in the driven gear 5. .

As shown in FIGS. 2 and 3, the main shaft 3 is pivoted by being placed on steel balls 28 arranged in a circle on a steel ball tray 29 attached to the floor hinge body 1. It is made free. In order to improve the rotation of the main shaft 3, a bearing 31 is provided on the shaft portion of the main shaft 3, and an O-ring 32 is provided to prevent leakage of the hydraulic oil W. The upper lid 2 is attached to the floor hinge body 1 by bolts 34 so as to cover the bearing 31 and the O-ring 32. An upper lid packing 2a is provided between the floor hinge body 1 and the upper lid 2 to prevent leakage of the sealed hydraulic oil W. In addition, a spacer 30 for eliminating a clearance is provided in the gap between the gear 3 a and the bearing 31 in the main shaft 3.

As shown in FIG. 1, a rod-shaped piston rod 6 is provided at one end of the driven gear 5 toward one side separated by a partition wall 1g at the other end of the floor hinge body 1 via a joint pin 7. It is connected.
The other end portion of the driven gear 5 is formed in a cam shape so as to come into contact with a contact arc member 12 provided on the spring rod 11 via a pin 13 and a bush 13a.
The contact arc member 12 only needs to have an arc shape at least at a position where it comes into contact with the spring rod 11, and any frictional force with the contact portion 5 b in the driven gear 5 is as small as possible. . Therefore, it may be one that rotates as a roller, or any other shape that allows the driven gear 5 to be in sliding contact.
As shown in FIG. 4, the contact location of the contact arc member 12 and the contact portion 5 b in the driven gear 5 is cam-shaped from the axis X with respect to the advancing direction of the contact arc member 12. The portion 5b is contacted with a contact angle α toward the center of the radius of curvature.
Although the operation of the door will be described later, as shown in FIG. 5, the shape of the contact arc member 12 and the contact portion 5b in the driven gear 5 is such that the driven gear is in the state where the door is opened 180 degrees. 5 and the contact arc member 12 are in contact with each other with a contact angle α.
That is, the contact portion 5b of the driven gear 5 is formed so as to always contact with the contact arc member 12 with the contact angle α until the door is opened 180 degrees. .

As shown in FIG. 1, the spring rod 11 is interposed via a cylindrical spring rod socket 14 having a square through hole (not shown) in the longitudinal direction of the floor hinge body 1 fixed by a detent pin 15. Mounted slidably. The spring rod 11 has a square cross section in order to prevent rotation in the outer peripheral direction and to uniformly disperse the surface pressure in friction with the spring rod socket 14.
Further, the spring rod 11 is not limited to a square shape, but may be a cylindrical shape or other shapes. If the spring rod 11 has a shape that rotates in the outer circumferential direction, the rotation may be prevented by using a rotation prevention key, the rotation prevention pin 15 or the like.

Further, the spring rod socket 14 is not limited to a cylindrical shape, but may be a quadrangular prism or other shapes, and the anti-rotation pin 15 prevents rotation of the spring rod socket 14 in the outer peripheral direction. The shape of the spring rod socket 14 that does not involve rotation in the outer circumferential direction may be omitted.
Alternatively, the spring rod 11 can be slidably attached by providing the rectangular through hole directly in the longitudinal direction of the floor hinge body 1 without using the spring rod socket 14.

Theoretically, considering the efficiency of the transmission force, it is desirable that the driven gear 5 and the spring rod 11 are brought into contact with each other on the axis X with respect to the traveling direction of the contact arc member 12. However, in this structure, the spring rod 11 has a clearance from the spring rod socket 14 on both sides in the width direction in relation to the spring rod socket 14 slidably attached. In this case, when the door is opened and closed and the driven gear 5 is rotated, the spring rod 11 tilts and slides in either direction with respect to the clearance with the spring rod socket 14. Is in a possible state. Accordingly, the vibration between the spring rod 11 and the spring rod socket 14 when the door is opened or closed causes vibration between the spring rod 11 and the spring rod socket 14 due to fluctuations in the tilting direction of the spring rod 11. Impact sound is generated.
Therefore, if such a state is continuously performed, not only an impact sound is generated, but also the durability of the spring rod 11 and the spring rod socket 14 is affected.

  On the other hand, when the abutting arc member 12 is abutted with an abutting angle α toward the center of the radius of curvature of the abutting portion 5b having a cam shape from the axis X with respect to the traveling direction of the abutting arc member 12, the spring rod socket The tilting direction of the spring rod 11 with respect to 14 is always constant, and the generation of impact sound can be prevented.

In the present embodiment, in order to prevent the generation of impact sound due to vibration at the time of opening and closing of the spring rod 11 and the spring rod socket 14 in the floor hinge body 1 and to improve the opening and closing efficiency, the contact angle α is It can be set arbitrarily.
Further, the gear 5a in the driven gear 5 may be provided to such an extent that the door can be completely opened and closed.

  A spring receiving seat 16 is fixed by a bolt 17 to the other end of the spring rod 11 that does not have the contact arc member 12.

A core spring 19 is provided from the spring seat 16 to the other side without the piston rod 6 separated by a partition wall 1g at the other end of the floor hinge body 1, and a main spring 18 is provided outside the core spring. Is provided. The main spring 18 and the core spring 19 are interposed between the main spring 18 and the core spring 19 so as to be urged in the door closing direction between the main lid 18 and the horizontal lid 22 attached to the other end of the floor hinge body 1. The horizontal lid 22 is attached to the floor hinge body 1 via an O-ring 23 so that the hydraulic oil W sealed in the floor hinge body 1 does not leak.
The main spring 18 and the core spring 19 have a closing force stronger than when one spring is used, and two are used for use in a large door. On the other hand, when the floor hinge body 1 is used for a small door, the number of springs can be one according to the closing force.

  A piston having a resin lid 35 attached to the end of the piston rod 6 not having the driven gear 5 through a piston pin 8 so as to be slidably movable in the working chamber 33 separated by the partition wall 1g. 9 is provided. In addition, an oil hole 9a for allowing the hydraulic oil W to pass through to the filter 10 described later is formed in the center of the piston 9 along the longitudinal direction. Further, a spring pin 36 is provided in the vicinity of the oil hole 9a, and a spherical valve body 21 capable of closing the oil hole 9a is provided between the oil hole 9a and the spring pin 36 in a detachable manner. Yes. Further, a piston filter 26 capable of filtering iron powder generated by wear of each component in the hydraulic oil W is attached to the piston pin 8 side, and a seal 27 is provided on the outer periphery of the central portion in the longitudinal direction. Is provided.

  A filter 10 that can similarly filter iron powder generated by wear of each component in the hydraulic oil W is attached to the other end of the floor hinge body 1 than the piston 9. The horizontal lid 22 is attached to the end of the hinge body 1 through the O-ring 23 in the same manner as described above. A magnet 20 is installed on the horizontal lid 22 on the side having the filter 10 so that fine iron powder that could not be removed by the filter 10 can be adsorbed and removed.

Further, a hydraulic oil passage 1f through which the hydraulic oil W can pass is communicated with the hydraulic chamber 33 in a vertically lower part of the partition wall 1g in the floor hinge body 1 and the main spring 18 and the like are biased. It is formed over the same length as the partition wall 1g in the same direction as that of the partition wall. A stopper 24 is attached to the end of the hydraulic oil passage 1f in the floor hinge body 1 to prevent the hydraulic oil W from leaking.
Further, in the vertical direction of the partition wall 1g in the same direction as the driven gear shaft 4, two through holes for attaching the adjustment valve 25 are provided so as to communicate with the hydraulic oil passage 1f.
Further, a first adjusting hole 1d and a second adjusting hole 1e are communicated with the side of the partition wall 1g having the filter 10 perpendicular to the hydraulic oil passage 1f from the two through holes.
The first adjustment hole 1d is provided at a position of the partition wall 1g located between the filter 10 and the horizontal lid 22, while the second adjustment hole 1e is the piston in a state where the door is closed. 9 is provided at least at a place to be closed.

  As shown in FIG. 3, the through hole communicating with the hydraulic oil passage 1 f has an O-ring 25 a for preventing leakage of the hydraulic oil W at the head, and a flow rate of the hydraulic oil W at the abdomen. The adjustment valve 25 having a screw portion is attached so as to be adjustable from the outside of the hinge body 1. The adjusting valve 25 is provided to adjust the opening / closing speed of the door by adjusting the flow rate of the hydraulic oil W from the outside of the floor hinge body 1, and is provided at the lower end of the adjusting valve 25. Is provided with a notch.

Next, the operation of the floor hinge according to the embodiment of the present invention will be described.
FIG. 6 shows a state where the door is closed. When the door is completely closed, the main shaft 3 is rotated counterclockwise B, and the driven gear 5 is rotated clockwise in accordance with the rotation. The piston rod 6 and the piston 9 are pushed in the direction D, and the piston 9 keeps the rightmost state.

FIG. 7 shows a state after the door is slightly opened from the closed state. From the state shown in FIG. 6, the main shaft 3 rotates in the clockwise direction A, and the driven gear 5 rotates in the counterclockwise direction B as the main shaft 3 rotates. As a result, the first rod 6 and the piston 9 attached to one end of the driven gear 5 are pulled in the direction C.
Further, with the rotation of the driven gear 5 in the counterclockwise direction B, the contact arc member 12 that is in contact with the contact portion 5b of the driven gear 5 while having a contact angle α passes through the contact arc member 12. The second rod 11 and the spring seat 16 are pressed and moved in the direction D, and the main spring 18 and the core spring 19 are compressed.

  At this time, when the piston 9 is pulled in the direction C, the valve body 21 opens the oil hole 9a, and the hydraulic oil W passes through the oil hole 9a from the piston rod 6 side to the filter 10 side. Move to.

FIG. 8 shows a state where the door is opened to 90 degrees from the state of FIG.
The main shaft 3 further rotates clockwise A, and the driven gear 5 further rotates counterclockwise B. As a result, the piston 9 further moves in the direction C.
Further, with the rotation of the driven gear 5 in the counterclockwise direction B, the contact arc member 12 that is in contact with the contact portion 5b of the driven gear 5 while having a contact angle α passes through the contact arc member 12. The spring rod 11 and the spring seat 16 are pressed and moved in the direction D, and the main spring 18 and the core spring 19 are further compressed.

FIG. 9 shows a state where the door is opened up to 180 degrees from the state of FIG.
It is possible to open the door larger than this state, and when the door is further opened, the gear portion 5a of the driven gear 5 interferes with the rotation stop 1c on the side wall of the floor hinge body 1, and therefore the main shaft 3 And the driven gear 5 will not rotate.
Also in this state, the contact portion 5b of the driven gear 5 and the contact arc member 12 have a contact angle α.

FIG. 10 shows a state in which the opened door starts to close. When the force in the opening direction with respect to the door is released, the door is closed by the elasticity of the main spring 18 and the core spring 19.
That is, when the main spring 18 and the core spring 19 start to return in the direction C and the piston 9 starts to return in the direction D by the elastic force of the main spring 18 and the core spring 19, the driven gear 5 Is rotated in the clockwise direction A, and the main shaft 3 is rotated in the counterclockwise direction B, whereby the door starts to close.

  When the door is started to close, the valve body 21 in the piston 9 closes the oil hole 9a, and the hydraulic oil W on the piston 9 side passes through the first adjustment hole 1d and the second adjustment hole 1e. It flows into the working chamber 33 through the hydraulic oil passage 1f.

FIG. 11 shows a state when the door is closed 90 degrees from a state where the door is opened 180 degrees.
The way of flowing the hydraulic oil W at this time is the same as that shown in FIG.

  As shown in FIG. 12, when the door is further closed from 90 degrees, it is urged in the direction C by the elastic force of the main spring 18 and the core spring 19, and the contact arc member 12 in the spring rod 11 When the driven gear 5 rotates in the clockwise direction A, the piston rod 6 and the piston 9 further move in the direction D. As a result, the piston 9 closes the second adjustment hole 1 e of the partition wall 1 in the floor hinge body 1. Therefore, in this state, the hydraulic oil W does not flow from the second adjustment hole 1e, and flows only from the first adjustment hole 1d to the working chamber 33.

FIG. 13 shows a state where the door is closed.
As described above, the door is opened and closed by the action of the hydraulic oil W, the main spring 18 and the core spring 19 in the floor hinge body 1.

表１に示すように、開き力においては、開閉トルクの数値を大きく下げることができ、また、扉の開き角度によることなく、その数値を均一化することができた。
また、閉じ力においても、開閉トルクの数値を大きく下げることができ、また、扉の開き角度によることなく、その数値を均一化することができた。
これによって、表２に示すように、本願発明品は、扉の開閉効率を向上させることができた。 In the door to which the floor hinge of the present invention was attached, the following opening / closing force test was performed based on JIS A 1510-3, and the opening force and the closing force were measured.
(Test method)
The opening force is measured by fully opening the speed adjustment valve of the test piece and closing speed of the door (the closing speed is “fast” is about 3 seconds from 70 degrees to fully closed, and “slow” is about 20 seconds) , “Intermediate” means about 5 to 8 seconds.) After “fast” is set, the test specimen is closed at a moderate speed so that the indication value of the push-pull gauge can be read from the closed state. The maximum value of force when passing through an opening angle of 0 to 5 degrees is measured, and the moment of force is obtained.
To measure the closing force, open the speed adjustment valve of the test piece to make the door closing speed “fast”, then open the test door and open the test door from the position of about 20 degrees by the closing force of the test piece. While closing, the maximum value of force when passing through an opening angle of 5 to 0 degrees is measured to determine the moment of force. At this time, the test door has a gentle speed that can read the indication value of the push-pull gauge (the push-pull gauge handle attached to the test door has a human force opposite to the closing force so that the test door closes gently. Add moderately.)
Moreover, in order to see the transition of the entire opening and closing force, instead of measuring only the maximum value at the door opening angle 0 to 5 degrees specified in JIS opening and closing force measurement, the measurement was performed by the same measurement method in increments of 15 degrees. .
(Test results)
Table 1 shows the test results of the opening force and the closing force in the conventional product that does not have the closing force increasing means and the product of the present invention. Table 2 shows the opening and closing efficiency based on the test results of the opening force and the closing force in the conventional product not having the closing force increasing means and the product of the present invention.

As shown in Table 1, in the opening force, the numerical value of the opening / closing torque could be greatly reduced, and the numerical value could be made uniform regardless of the door opening angle.
Moreover, the numerical value of the opening / closing torque can be greatly reduced in the closing force, and the numerical value can be made uniform regardless of the door opening angle.
Thereby, as shown in Table 2, the present invention product was able to improve the opening and closing efficiency of the door.

As described above, according to the door closing device according to the first embodiment of the present invention, in the door closing device for automatically closing the opened door by supporting the door of the building at the lower part or the like, the driven gear is provided. 16 is made to have a cam shape and is caused to act on the main spring 18 and the like via the abutting arc member 12 and the spring rod 11 by the rotation thereof, whereby the operation lever 59 in the conventional product of FIG. Parts of the operation roller 60, the connecting piece 54, and the first spring 56 can be eliminated. As a result, space saving of the floor hinge main body 1 itself and cost reduction by reducing parts can be achieved at the same time. Further, since the internal structure of the floor hinge body 1 is simplified compared to the conventional product, it is less likely to break than the conventional product having a large number of parts, and the production efficiency in assembly is improved. These are the effects due to the reduction in the number of components, and the main effects of the present invention are as follows.
That is, when the door is opened and closed, the contact portion between the contact arc member 12 and the contact portion 5 b in the driven gear 5 is always cam-shaped from the axis X with respect to the advancing direction of the contact arc member 12. As shown in Table 1, the operating force at the time of opening and closing the door can be made substantially constant and stable by making contact with the contact angle 5a toward the center of the radius of curvature at the contact portion 5b. It is in.
As a result, as shown in Table 2, the door opening and closing efficiency can be improved when the door is opened and closed. Therefore, the door can be opened and closed with substantially the same acting force, and there is no problem of having a large force when the door is opened.

A door hinge having substantially the same structure as that of the first embodiment of the door closing device of the present invention but capable of opening and closing by 90 degrees and having a door opening / closing holding mechanism will be described with reference to FIGS.
Although the overall configuration is substantially the same, as shown in FIG. 14, the shape of the contact portion 5b of the driven gear 5 with the contact arc member 12 is different. Only the differences will be described below.

As shown in FIG. 14, the shape is substantially the same as that of the driven gear 5, except that a recessed portion 5 c and a holding portion 5 d are provided in the contact portion 5 b.
The hollow portion 5c and the holding portion 5d are provided for holding the door open and close, and the hollow portion 5c is substantially the same as the contact arc member 12 so as to cover the contact arc member 12. It is formed from the diameter. On the other hand, the holding portion 5d is rounded to a predetermined size at both end portions of the recess portion 5c, and is provided for improving durability with the contact arc member 12.
Similarly to the first embodiment, the contact location of the contact arc member 12 and the contact portion 5b in the driven gear 5 is cam-shaped from the axis X with respect to the advancing direction of the contact arc member 12. The abutting portion 5b is abutted with a contact angle β toward the center of the radius of curvature.
Moreover, the said recessed part 5c and the said holding | maintenance part 5d in the said contact part 5b are provided in the said contact part in the said driven gear 5 so that a door may be opened and closed in the state opened 90 degree | times.

In operation, the contact portion 5b of the driven gear 5 always rotates with the contact arc member 12 and the contact angle β until the door is opened and held open and closed.
When the door is opened 90 degrees later, as shown in FIG. 15, the recessed portion 5 c in the contact portion 5 b covers a part of the arc in the contact arc member 12, and the recessed portion 5 c The abutting arc member 12 is held by the holding portions 5d located at both ends. Thereby, opening and closing of the door is maintained.

If the recessed portion 5c of the contact portion 5b in the driven gear 5 has a large portion covering the arc of the contact arc member 12, the holding force of the door increases. On the other hand, when releasing the open / closed holding state of the door, since the force for holding the door is strong, the sag with respect to the abutting arc member 12 is increased, resulting in poor durability.
In addition, the larger and gentler the holding portion 5d, the better the durability against the contact arc member 12, but the force for holding the door becomes weaker. On the other hand, if the holding portion 5d is made too small, the contact arc member 12 and the holding portion 5d are scraped and worn, thereby reducing the holding force of the door.

  In the present embodiment, as in the first embodiment, in order to prevent the generation of impact sound due to vibrations when the spring rod 11 and the spring rod socket 14 are opened and closed in the floor hinge main body 1 and to improve the opening and closing efficiency. In addition, the contact angle β can be arbitrarily set.

  Moreover, in the said Example 1 and the said Example 2, the said floor hinge main body 1 which concerns on embodiment of this invention is embedded in a floor surface in order to support the lower part of the door which opens and closes provided in the building. However, the floor hinge main body 1 can be installed above the door to support the upper part of the door that is opened and closed provided in the building.

  Moreover, in the said Example 1 and the said Example 2, contact angle (alpha) and contact angle (beta) can be changed arbitrarily by the specification of a floor hinge. That is, the contact portion 5b of the driven gear 5 in any of the first and second embodiments is not limited to the shape according to the first and second embodiments.

It is a partial cross section top view in the whole structure of the floor hinge which concerns on Example 1 of this invention. It is a partial PP cross-section side view in the whole structure of the floor hinge which concerns on Example 1 of this invention. It is a partial QQ section side view in the whole floor hinge composition concerning Example 1 of the present invention. It is the elements on larger scale of a driven gear, a spring rod, and a contact arc member in the state where the door of the floor hinge concerning Example 1 of the present invention closed. It is the elements on larger scale of a driven gear, a spring rod, and a contact arc member in the state where the door of the floor hinge concerning Example 1 of the present invention opened. It is a partial cross section top view in the whole structure in the state where the door of the floor hinge which concerns on Example 1 of this invention closed. It is a partial cross section top view in the whole structure in the state where the door of the floor hinge which concerns on Example 1 of this invention opened slightly. It is a partial cross section top view in the whole structure in the state where the door of the floor hinge which concerns on Example 1 of this invention opened 90 degree | times. It is a partial cross section top view in the whole structure in the state where the door of the floor hinge which concerns on Example 1 of this invention opened 180 degree | times. It is a partial cross section top view in the whole structure in the state where the door of the floor hinge which concerns on Example 1 of this invention begins to close. It is a partial cross section top view in the whole structure in the state where the door of the floor hinge which concerns on Example 1 of this invention closed 90 degrees. It is a partial cross section top view in the whole structure in the state where the door of the floor hinge which concerns on Example 1 of this invention was further closed from 90 degree | times. It is a partial cross section top view in the whole structure in the state where the door of the floor hinge which concerns on Example 1 of this invention was closed completely. It is the elements on larger scale of a driven gear, a spring rod, and a contact arc member in the state where the door of the floor hinge with an opening-and-closing holding mechanism concerning Example 2 of the present invention closed. It is the elements on larger scale of a driven gear, a spring rod, and a contact arc member in the state where the door of the floor hinge with an opening-and-closing holding mechanism concerning Example 2 of the present invention opened. It is a partial cross section top view in the whole structure of the conventional floor hinge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor hinge main body 1a Storage part 1b Anti-rotation 1c Anti-rotation 1d 1st adjustment hole 1e 2nd adjustment hole 1f Hydraulic oil passage 1g Partition 2 Upper cover 2a Upper cover packing 3 Main shaft 3a Gear 4 Driven gear shaft 5 Driven gear 5a Gear 5b Contact portion 5c Depression portion 5d Holding portion 6 Piston rod 7 Joint pin 8 Piston pin 9 Piston 9a Oil hole 10 Filter 11 Spring rod 12 Contact arc member 13 Pin 13a Bush 14 Spring rod socket 15 Non-rotating pin 16 Spring receiving seat 17 Bolt 18 Main spring 19 Core spring 20 Magnet 21 Valve body 22 Horizontal lid 23 O-ring 24 Plug 25 Adjustment valve 25a O-ring 26 Piston filter 27 Seal 28 Steel ball 29 Steel ball tray 30 Spacer 31 Bearing 32 O-ring 33 Working chamber 34 Bolt 35 Resin lid 36 Spring pin 50 Flow Hinge body 50a Storage portion 50b Partition wall 50c Cylinder chamber 50d Cylinder chamber 50e Partition wall 50f Hydraulic oil passage 51 Main shaft 52 Driven gear shaft 53 Driven gear 54 Connecting piece 55 Piston rod 56 First spring 57 Piston 57a Oil hole 58 Pressing roller 59 Operation lever 60 Operation roller 61 Spring rod 62 Second spring 63 Filter 64 Valve body 65 Adjustment hole 66 Valve W Hydraulic oil

Claims (3)

A main shaft that is the center of rotation of the door that opens and closes with respect to the opening provided in the building, a piston that moves in the working chamber as the main shaft rotates by opening and closing the door, and a spring that biases the piston toward the door closing direction And
A passage hole through which the working oil passes when the door opens and closes is formed at a predetermined position of the piston and the working chamber, and by adjusting the amount of hydraulic oil that passes through the passage hole when the door closes, In the door closing device that adjusts the speed during closing,
A contact arc member provided at one end of a spring rod that linearly moves by the elastic force of the spring;
It has a driven gear that rotates as the main shaft rotates,
A door closing device characterized in that the driven gear having a contact portion cam-shaped and the contact arc member are in contact.   The spring rod is slidably installed in the door closing device, and the abutting portion of the driven gear and the abutting portion of the abutting arc member are obliquely arranged with respect to the axis in the elastic direction of the spring. The door closing device according to claim 1, wherein   3. The door closing device according to claim 1, wherein the contact portion of the driven gear is provided with a recessed portion capable of opening and closing the door.

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