JPH0674277A - Opening/closing action supporting mechanism for opening/ closing body - Google Patents

Abstract

PURPOSE:To allow the closing action of an opening/closing body to be stopped in an optional position and relax a shock at the ending time of closing or opening action. CONSTITUTION:A one-way rotary damper 1 is fixedly disposed in such a way that a first gear 16 connected to a first rotary shaft that can be engaged with a one-way clutch is meshed with an opening/closing body gear 3b provided in the appropriate position of an opening/closing body 3. A bidirectional locking clutch 2 is disposed in such a way that a second gear 29 connected to a second rotary shaft impeded in its rotation in the other direction in the state of being rotatable in one direction but rotatable in the other direction by imparting specified rotational torque or more to the other direction is meshed with an opening/closing body gear 3c provided in the appropriate position of the opening/ closing body 3.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention can prevent the opening / closing body from moving in the opposite direction at any position of opening or closing operation, and by applying an external force of a predetermined amount or more, the opening / closing member can be opened or closed from that position. The present invention relates to an opening / closing operation support mechanism for an opening / closing body, which is capable of operating in the opposite direction and capable of absorbing a shock at the final position of the opening or closing operation of the opening / closing body.

[0002]

2. Description of the Related Art As an opening / closing body, a rotating body such as a rotating lid or a rotating door used for a laptop personal computer, a piano, a Western-style toilet or the like that opens from bottom to top around a rotation axis, or a desk or the like. There are drawers used for office furniture. The former is provided so as to be vertically or horizontally rotatable within a rotation angle range of about 90 to 120 degrees, and the latter can be pulled out or pushed in a predetermined amount in the front-rear direction or the like. By the way, conventionally, a cam type locking device has been known as a device for stopping these opening / closing bodies when they are opened to a predetermined position.

In this locking device, for example, when the rotary lid is opened up to a predetermined angle, it is locked and stopped by a cam, and then when the rotary lid is to be closed, the rotary lid is lifted slightly upward. The lock of the cam is released by, so that the rotary lid is closed downward.

[0004]

However, since this cam type locking device has a structure that locks only when the rotary lid or the like is opened or closed to a predetermined position set in advance, it can be locked at any position. There is a problem that it cannot be locked.

Further, since the above-mentioned rotary lid or the like becomes a free-falling rotating object at the time of closing, unless it is closed with a hand or the like until the end of the closing operation, the immovable portion (base) is closed. There is an inconvenience that it collides with the table and produces a loud impact sound and causes damage. Further, these rotary lids and the like may be provided with an elastic member that urges the rotary shaft or the like in either the closing or opening direction. In addition, there is a case where an impact is generated by colliding with an arbitrary immovable portion at the final position in the closing or opening direction.

The present invention has been made to solve the above-mentioned problems, and supports an openable and closable body such as a rotary lid so as to be openable and closable, and the opening and closing operation thereof can be stopped at an arbitrary position, and vice versa. Opening and closing of the opening and closing body that can easily release the lock and free the movement in the opposite direction by applying an external force more than a predetermined amount in the direction, and can mitigate the impact at the end of the closing or opening operation. An object is to provide a motion support mechanism.

[0007]

In order to achieve the above object, an opening / closing operation support mechanism for an opening / closing body of the present invention supports an opening / closing operation of an opening / closing body that is opened / closed by gear transmission with respect to a stationary portion. In the mechanism, a hollow rotary shaft rotatably loaded into the outer cylindrical body via a viscous liquid,
A first rotating shaft, which is inserted into the hollow portion of the hollow rotating shaft and has a first gear connected to a protruding portion of the outer cylindrical body protruding outward, the hollow rotating shaft and the first rotating shaft. A one-way clutch interposed between the first gear and the gear for the opening / closing body or the stationary portion provided at an appropriate position of the opening / closing body or the stationary portion. As described above, the one-way rotary damper fixedly arranged on the immovable portion or the opening / closing body, the casing, the rotation in the other direction are prevented when the casing is rotatable in one direction, and at least a predetermined amount in the other direction. The rotation torque in the other direction is made possible by applying the rotation torque of the above, and at the same time, a part is projected from the casing so that the rotation in the one direction can be blocked unless the rotation torque of a predetermined value or more is applied. Second established
And a second rotation shaft connected to the protrusion of the second rotation shaft.
The gears for the opening / closing body or the stationary portion are fixed to the stationary portion or the opening / closing body so that the second gear meshes with the gears for the opening / closing body or the stationary portion provided at appropriate positions of the opening / closing body or the stationary portion. And a bidirectional locking clutch that is provided.

[0008]

For example, assuming that the opening / closing body is always urged in the closing direction by the elastic member or its own weight, when the opening / closing body is rotating in the opening direction, the two-way locking clutch is
The rotating shaft of is in a freely rotatable state, and the opening / closing body can be easily opened. When an external force is applied in the opposite direction, that is, the closing direction, the rotation of the second rotation shaft is blocked.

On the other hand, when a large external force of a predetermined value or more is applied to the closing direction, the second rotating shaft is free to rotate in the closing direction, contrary to the above. At this time, when the hand etc. attached to the opening / closing body is released, the opening / closing body is closed by the elastic member etc., but a predetermined braking force is exerted by viscous resistance of the one-way rotary damper, and the opening / closing body is slowly closed. It works.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the embodiments shown in the drawings. 1 to 9 show a first embodiment of an opening / closing operation support mechanism for an opening / closing body according to the present invention, wherein 1 is a one-way rotary damper and 2 is a bidirectional locking clutch. In this embodiment, as shown in FIGS. 1 to 3, the rotary lid 3 which is opened / closed as an opening / closing body is opened / closed in the vertical direction.
It is an example applied to a storage box provided with, and 4 denotes a main body of the storage box which is a non-moving part. Further, 3a is a rotary shaft arranged on the rotary base of the rotary lid 3, 3b and 3c are first and second gears for opening / closing bodies fixedly arranged near both ends of the rotary shaft 3a,
One end of each of 3d and 3e is fixed to the inside of both side wall portions of the rotary lid 3, and the other end is fixed to the first and second gears for the opening / closing body, so that the rotary lid 3 is always biased in the closing direction. And a coil spring as an elastic member. In addition,
If the rotary lid 3 is closed by its own weight, the coil springs 3d and 3e are unnecessary.

The one-way rotary damper 1 has a main body 4
One support member 4a fixed to the inner side of one side wall 41
For fixing to (see FIG. 1), as shown in FIGS. 4 and 5, an outer cylindrical body 10 having a flange 10a protruding from the bottom,
A hollow rotary shaft 12 housed and loaded in the outer cylindrical body 10 via a viscous liquid 11 such as grease, a first rotary shaft 13 rotatably inserted into a hollow portion of the hollow rotary shaft 12, and First
One-way clutch 14 that is interposed between the inner peripheral surface 12a of the hollow rotating shaft 12 and the inner peripheral surface 12a of the hollow rotating shaft 12 so as to be in contact with the peripheral surface of the rotating shaft 13, and an insertion hole 15a through which the first rotating shaft 13 can be inserted.
A lid member 15 that is attached to the upper portion of the outer cylinder body 10 and has the tip portion 13a of the first rotating shaft 13 protruding outward.
A first gear 16 fitted and connected to a tip portion 13a of the first rotating shaft 13 is configured. In addition, 17, 18
Is a sealing packing disposed between the lower surface or the upper surface of the hollow rotating shaft 12 and the bottom surface of the outer cylindrical body 10 or the lid member 15, and the viscous liquid 11 is filled outside the sealing packings 17 and 18. Has been done.

The one-way clutch 14 allows free rotation without engaging with the first rotary shaft 13 when the first rotary shaft 13 rotates in the opening direction of the rotary lid 3, for example. When the rotary shaft 13 rotates in the closing direction of the rotary lid 3, any one may be used as long as it has a function of engaging with the first rotary shaft 13. For example,
What is shown in the cross-sectional view of FIG. 5 can be used.

The one-way clutch 14 has a needle roller 141 in contact with the peripheral surface of the first rotary shaft 13 and a groove portion 142 formed so that the groove bottom surface is slightly inclined to one side and holding the needle roller 141. The roller receiving outer ring 143 includes a roller receiving outer ring 143 and a spring 144 supported by the roller receiving outer ring 143 and biasing the needle roller 141 in a direction in which the groove portion 142 narrows. Therefore, when the first rotary shaft 13 rotates in the X direction in FIG.
(When the rotary lid 3 is opened), the first rotary shaft 13 is allowed to idle without being locked, and conversely, when the first rotary shaft 13 is rotated in the Y direction (when the rotary lid 3 is closed), the groove portion 142 is narrowed by the spring 144. The needle roller 141 urged in the direction
The hollow rotary shaft 12 is rotated together with the first rotary shaft 13 by being locked to the rotary shaft 13.

In such a one-way rotary damper 1, as shown in FIG. 1, an outer cylindrical body 10 is fixed to a supporting member 4a of a main body portion 4 by fixing a flange 10a with a bolt (not shown), and a first rotation. A first gear 16 connected to a tip portion 13a, which is a protruding portion of the shaft 13, is arranged so as to mesh with a first gear 3b for opening / closing body supported by the rotating shaft 3a of the rotating lid 3.

As shown in FIG. 1, the bidirectional locking clutch 2 includes a rotary lid 3 and a one-way rotary damper 1 as described above.
On the side opposite to the disposition position, that is, on the second opening / closing body gear 3c of the rotary lid 3, the tip end portion 2 which is the protruding portion of the second rotating shaft 23 is provided.
While the second gear 29 fitted and connected to 3a meshes,
The casing 20 is fixedly disposed on the other support member 4b fixed to the other side wall 42 of the main body portion 4, and for example, when the casing 20 is rotatable in the opening direction, rotation in the closing direction is blocked, and closing is performed. Any structure may be used as long as it can be rotated in the closing direction by applying a rotation torque of a predetermined direction or more. However, the bidirectional locking clutch 2 used in this embodiment is It has the structure shown in FIGS.

The casing 20 is composed of an outer casing 21 and an inner casing 22.
6, a flange 21b for fixing to the other supporting member 4b of the main body portion 4 is projectingly provided on the bottom portion 21a thereof as in the case of the outer cylindrical body 10 of the one-way rotary damper 1 described above. ing. A bearing groove 21c for supporting the second rotating shaft 23 is formed on the inner surface of the bottom portion 21a, and an outer lid member 21e is fixed to the opening portion 21d. The inner casing 22 is fixed and loaded in the outer casing 21, and the bottom portion 2 having the shaft insertion hole 22a is formed.
2b, and the roller holder 2 to be described later in the opening 22c.
A substantially tubular inner lid member 22 that is attached after housing 4 etc.
d is fixed.

The second rotating shaft 23 is inserted into the hollow holes of the outer lid member 21e and the inner lid member 22d and the shaft insertion hole 22a of the inner casing 22 and is rotatable in the bearing groove 21c of the outer casing 21. As described above, the second end portion 23a is supported and disposed on the end portion 23a and is protruded outward.
Gears 29 are connected and arranged so as to mesh with the second opening / closing body gear 3c of the rotary lid 3.

The roller holder 24 is made of a rigid body and
In the present embodiment, substantially U-shaped roller holding grooves 24a are formed in three places at intervals of 120 degrees, which are formed in a substantially annular shape having a predetermined thickness and in appropriate positions on the inner peripheral portion, as shown in FIG. Has been formed. In addition, a spring holding groove 24b is formed at a position corresponding to this on the outer peripheral portion. The roller holder 24 is disposed between the inner casing 22 and the second rotating shaft 23 so as to be sandwiched by a plurality of fixed plates 27 described later (see FIG. 6).

The roller members 25 are formed of a rod-shaped body having a length that can be accommodated in the inner casing 22. In this embodiment, three roller members 25 are inserted into the roller holding grooves 24a of the roller holder 24, respectively. Is provided (see FIG. 7).

The spring member 26 may be anything as long as it can bias the roller member 25 in a predetermined direction by restricting the rotation range of the roller holder 24. For example, it has elasticity such as a piano wire. Materials can be used. It may be a coil spring or the like. The spring member 26 is arranged substantially parallel to the roller member 25, and is arranged in the spring holding groove 24 of the roller holder 23.
Three of them are inserted and held in each of b (see FIG. 7). Both ends of each spring member 26 are fitted and fixed to the inner casing 22. The position of the spring member 26 is not particularly limited as long as it can perform the above-mentioned function. Therefore, it is not always necessary to provide the spring holding groove 24b formed in the roller holder 24 at the outer peripheral portion corresponding to the roller holding groove 24a.

The fixed plate 27 is the roller holder 24.
Is formed in a substantially annular shape similarly to the above, and is provided between the inner casing 22 and the second rotating shaft 23 adjacent to the roller holder 24, that is, on both sides thereof so as to sandwich the roller holder 24. One sheet is provided (see FIG. 6).
As shown in FIG. 9, the fixing plate 27 has a protrusion 27a on the outer peripheral portion, and the protrusion 27a fits into a recess formed in an appropriate position on the inner wall of the inner casing 22 and is fixed in the rotation direction. Is arranged.

Further, in this embodiment, the roller member 25 is inserted into a proper position on the inner peripheral portion of the fixing plate 27 at three positions corresponding to the roller holding groove 24a of the roller holder 24, and its movement is restricted. Roller insertion groove 27 for
b is formed. This roller insertion groove 27b is shown in FIG.
As shown in FIG. 5, the groove bottom surface is formed so that the central portion 27c of the groove bottom surface can slightly form a wedge angle P toward the second rotating shaft 23 side, that is, the groove bottom surface is tapered. .

As a result, in the roller insertion groove 27b, the distance between the central portion 27c of the groove bottom surface and the peripheral surface of the second rotary shaft 23 becomes the shortest, and the groove bottom surfaces 27d, 27 on both sides thereof.
e is gradually moved away from the peripheral surface of the second rotary shaft 23. The roller insertion groove 27b is formed in the central portion 27c.
The distance between the second rotary shaft 23 and the peripheral surface of the second rotary shaft 23 is slightly shorter than the diameter of the roller member 25.
The distance between 7e and the peripheral surface of the second rotary shaft 23 is the roller member 25.
Is formed to be slightly longer than the diameter. Therefore, the roller insertion groove 27b forms the shallowest groove portion 27f at the substantially central portion thereof, and the shallowest groove portion 27f is formed on both sides thereof.
Evacuation groove portions 27g and 27h that are deeper than f are formed.

Further, the fixed plate 27 is formed with a substantially arcuate cutout portion 27j from the outer peripheral portion so as to correspond to the roller insertion groove 27b. As a result, the wall portion forming the roller insertion groove 27b becomes thinner than the other wall portions, and in particular, the wall portion 27i forming the central portion 27c of the groove bottom becomes the thinnest and the wall portion 27i. The elastic force of is higher than other parts. Here, 28 is a fixing plate 27 on the outer peripheral portion of the roller holder 24,
It is a ring-shaped spacer arranged between 27.

Next, the operation of the opening / closing operation support mechanism of the opening / closing body according to this embodiment will be described. When the rotary lid 3 is opened, the first opening / closing body gear 3b rotates in the Y direction in FIG. Along with this, the first gear 16 and the first rotating shaft 13 meshing with the first opening / closing body gear 3b rotate in the X direction. One-way clutch 14 needle roller 14
Since 1 is pressed against the elastic force of the spring 144, the one-way rotary damper 1 freely rotates without the first rotary shaft 13 locking (see FIG. 5).

On the other hand, in the bidirectional locking clutch 2, as shown in FIGS. 7 and 9, the roller member 25 has the fixed plate 27.
One of the retreat groove portions 27 in the roller insertion groove 27b of
It is located at g. However, since both ends of the spring member 26 are fixed to the inner casing 22, in this state, a substantially central portion thereof is bent toward the retracting groove portion 27g. Therefore, the roller holder 24 is urged in the Y direction in FIG. 7 by the restoring force of the spring member 26, so that the fixing plate 2 is attached to the roller member 25.
Therefore, a constant biasing force is always applied in the direction of the shallowest groove 27f of the roller insertion groove 27b formed in FIG. As a result, when the rotary lid 3 is opened, the second opening / closing body gear 3c
The second gear 29 that meshes with the second gear 29 and the second rotary shaft 23 connected to the second gear 29 are located in the retreat groove portion 27g, so that the second gear 29 and the second rotation shaft 23 coupled to the second gear shaft 29 in the X direction as shown in FIGS. Rotate freely.

On the other hand, when the rotation of the rotary lid 3 is stopped, the weight of the rotary lid 3 and the coil spring 3 arranged on the rotary lid 3 are stopped.
Due to d and 3e, in the bidirectional locking clutch 2, a predetermined rotational torque is applied to the second rotating shaft 23 in the Y direction. As a result, the roller member 25 rolls in the Y direction as the second rotating shaft 23 rotates. Roller member 2
When 5 reaches the vicinity of the shallowest groove 27f from the retracting groove 27g of the roller insertion groove 27b of the fixed plate 27, the shallowest groove 2 is formed.
It cannot pass 7f and is locked. As a result, the rotation of the second rotary shaft 23 in the Y direction is blocked, and the rotary lid 3 stops at an arbitrary position.

When a rotational torque of a predetermined amount or more is applied to the rotary lid 3 in the closing direction, that is, the second gear 29 and the second rotary shaft 23 are forcibly rotated in the Y direction, the roller member 25 moves. , The wall portion 27i forming the central portion 27c of the groove bottom surface
Is the thinnest and has a higher elastic force than other portions, so that the shallowest groove portion 27f is elastically widened and rolls to the other retracting groove portion 27h. As a result, the roller holder 2
4 also rotates slightly in the Y direction, causing the spring member 26 to bend in the opposite direction. Therefore, when the roller member 25 is located in the retreat groove portion 27h, the rotation in the Y direction is free.

When the rotary lid 3 starts to rotate in the Y direction, the needle roller 141 of the one-way clutch 14 in the one-way rotary damper 1 is biased by the spring 144 and slightly moves in the direction in which the groove 142 becomes narrower. ,
The one-way clutch 14 engages with the first rotating shaft 13. Therefore, the first rotary shaft 13 is the hollow rotary shaft 12
At the same time, it rotates within the outer cylindrical body 10. as a result,
Since the viscous resistance of the viscous liquid 11 filled between the hollow rotary shaft 12 and the outer cylindrical body 10 acts, the first rotary shaft 1
3 and the hollow rotary shaft 12 rotate slowly, and with this, the rotary lid 3 also slowly closes.

In this case, in the two-way locking clutch 2, the roller member 25 is moved by the spring member 26 and the roller holder 24 so that the shallowest groove portion 27 of the fixed plate 27.
Since it is biased in the f direction (X direction at this position), even if a rotational force is applied in the opposite direction, the roller member 25
Is locked near the shallowest groove 27f. Therefore, when the rotary lid 3 is to be opened again after being closed, a rotational torque of a predetermined value or more is applied to the second rotary shaft 23 to forcibly rotate it in the X direction, so that the roller member 25 is again rotated. It does not rotate in the opening direction unless it is moved to the retreat groove portion 27g. Therefore, even if an unexpected external force such as wind or vibration is applied in the opening direction after closing, the rotary lid 3 will not be easily opened.

10 to 13 show another embodiment of the opening / closing operation support mechanism of the opening / closing body according to the present invention. In this embodiment, a drawer 2 such as an office desk or an office cabinet is used as an opening / closing body.
This is an example applied to 00, and 210 is a main body portion such as a desk or a cabinet for putting the drawer 200 in and out.

The drawer 200 is formed in a substantially box shape, and is formed on the outer surface of the side walls 201 and 202 along the direction of opening / closing (opening / closing direction) of the drawer 200 with the first rack 201a and the first rack 201a as gears for the opening / closing body. Two racks 202a are fixed. In addition, a protrusion 203 that engages with a guide groove 211 formed in the main body 210 is provided in the lower portion of each of the side walls 201 and 202 along the pulling-out / pushing-in direction. It should be noted that such a guide groove 21 is used as an engaging means for putting the drawer 200 in and out of the main body 210.
The means is not limited to the means formed by 1 and the projection 203, and for example, a guide wheel (not shown) or the like may be used instead of the projection 203. Also, when you pull out,
Of course, a stopper member (not shown) may be provided so that 0 does not fall off the main body 210.

In the main body 210, the wall portions 212 and 213 facing the side walls 201 and 202 of the drawer 200 are
A one-way rotary damper 214 and a bidirectional locking clutch 215 are fixedly arranged. Specifically, the one-way rotary damper 214 is provided with the flange 214b fixed to the one wall portion 212 so that the first gear 214a meshes with the first rack 201a. The flange 215 is fixed to the other wall portion 213 so that the second gear 215a meshes with the second rack 202a. The one-way rotary damper 214 and the bidirectional locking clutch 215
Both and may be fixed to only one side wall of the drawer 200.

The drawer 200 is, for example,
As shown in FIG. 12, an outer end 222 of a constant output spring 220, which is an elastic member having a rotating shaft 221 fixed in the main body 210, is connected and fixed to a rear wall 204, and in a normal state, a pushing direction (Fig. 12 arrow R direction). As a means for urging the drawer 200, as shown in FIG. 13, a fixed shaft 216 is provided in front of the main body 210.
It is also possible to provide a protruding portion 206 also on the rear wall 204 of the drawer 200, and to dispose the coil spring 230 between them. Further, as shown in FIG. 14, the guide groove 211 of the main body 210 may be formed to be slightly inclined from the horizontal state, and the drawer 200 may be always biased in the pushing direction (arrow R direction in FIG. 14). Good. In this case, the constant output spring and the like described above are unnecessary. The other structures of the one-way rotary damper 214 and the bidirectional locking clutch 215 are exactly the same as those of the above-described embodiment.

According to the opening / closing operation support mechanism of the opening / closing body according to the present embodiment, when the drawer 200 is operated in the drawing direction (arrow F direction in FIG. 12), the first gear 214a of the one-way rotary damper 214 is indicated by the arrow. Rotate in the X direction. Therefore, the first rotary shaft is in a state capable of idling inside the hollow rotary shaft, as in the above-described embodiment. Further, in the bidirectional locking clutch 215, the second gear 215a
Rotates in the direction of arrow X, so that the second rotation shaft is also rotatable as in the above embodiment.

When the pulling-out operation in the direction of arrow F is stopped, when the constant output spring 220 is provided as the elastic member, the pulling-out 200 is pulled out by the constant output spring 220.
Therefore, the second gear 215a and the second rotation shaft of the bidirectional locking clutch 215 rotate in the arrow Y direction in order to be pulled back in the arrow R direction. The roller member of the bidirectional locking clutch 215 rolls and moves in the Y direction in accordance with the rotation of the second rotating shaft, and locks at the shallowest groove portion of the fixed plate, as in the above embodiment. As a result, the rotation of the second rotation shaft in the Y direction is blocked, and the drawer 200 stops at any position (see FIG. 7).

When an external force larger than a predetermined amount is applied to the drawer 200 in the arrow R direction to forcibly rotate the second gear 215a and the second rotary shaft in the Y direction, the roller member elastically moves in the shallowest groove portion. Since it spontaneously expands and rolls to the other retracting groove portion, the rotation of the second rotating shaft in the Y direction becomes free (see FIG. 7). As a result, the drawer 200 moves in the direction of the arrow R by the restoring force of the constant output spring 220 and is about to be pushed in.

When the drawer 200 starts to move in the direction of arrow R, the one-way rotary damper 214
Since the one-way clutch engages with the first rotary shaft as in the above-described embodiment, the first rotary shaft and the first gear 214a connected to the first rotary shaft rotate together with the hollow rotary shaft to reduce the resistance of the viscous liquid. Will receive. Therefore, the first gear 214a moves along the first rack 201a in the closing direction (direction of arrow R) while receiving the resistance of the viscous liquid, so that the drawer 200 slowly performs the closing operation.

In each of the above embodiments, the opening / closing body is always biased in the closing direction by the coil springs 3d, 3e or the constant output spring 220, the coil spring 230, etc., but in the opening direction. It may be configured to be activated. In that case, the rotary lid 3 or the drawer 200 acts in the opposite manner to the above, and moves slowly when operating in the opening direction.

In each of the above-described embodiments, the bidirectional locking clutches 2, 215 have been described in which a plurality of thin plate-shaped fixing plates punched by press are arranged in consideration of the manufacturing cost and the like, but they are integrally molded. You may use the thing. Furthermore, in each of the above-described embodiments, the one-way rotary dampers 1 and 214 are attached to the body portions 4 and 210 as immovable portions.
The case in which the bidirectional locking clutches 2 and 215 are fixed has been described, but this is fixed to the rotary lid 3 or the drawer 200, and the main body gears (not shown) are attached to the main body portions 4 and 210.
May be provided.

[0041]

The opening / closing operation support mechanism for the opening / closing body of the present invention comprises:
A one-way rotary damper and a bidirectional locking clutch are provided, and the opening / closing operation of the opening / closing body is supported by the first gear and the second gear connected to the rotating shafts of both. Therefore,
The opening / closing body can be freely moved in the opening or closing direction and can be stopped at any position in the middle of the operation. Moreover, the opening or closing operation can be slowed by the buffering force of the one-way rotary damper at the time of opening or closing, and the opening and closing body is damaged due to a collision or impact at the end of the opening or closing rotation. There is nothing to do. Further, even after opening or closing, the locking force of the bidirectional locking clutch does not easily cause the operation in the other direction due to an unexpected external force such as wind.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment in which an opening / closing operation support mechanism for an opening / closing body according to the present invention is applied to a storage box having a rotating lid as an opening / closing body.

FIG. 2 is an external perspective view showing a state in which the rotary lid of the storage box used in the embodiment is closed.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view showing a rotary damper used in the same embodiment.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a cross-sectional view showing a bidirectional locking clutch used in the same embodiment.

FIG. 7 shows a roller holder, a fixed plate, a second rotating shaft,
It is sectional drawing which shows the arrangement relationship of a roller member and a spring member.

FIG. 8 is a plan view showing a roller holder of the bidirectional locking clutch used in the embodiment.

FIG. 9 is a plan view showing a fixing plate of the bidirectional locking clutch used in the embodiment.

[FIG. 10] For an office desk or the like equipped with a drawer as an opening / closing body,
It is sectional drawing which shows the principal part of the Example to which the opening / closing operation support mechanism of the opening / closing body concerning this invention is applied.

FIG. 11 is a perspective view showing a drawer serving as an opening / closing body of the embodiment.

FIG. 12 is a side view showing an arrangement relationship between a drawer and a constant output spring which is an elastic member used in the embodiment.

FIG. 13 is a side view showing an arrangement relationship between a drawer and a coil spring which is an elastic member used in the embodiment.

FIG. 14 is a partial cross-sectional view schematically showing a configuration in which the drawer is inclined with respect to the main body and is normally biased in the closing direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary damper 10 outer cylinder body 11 viscous liquid 12 hollow rotary shaft 13 first rotary shaft 14 one-way clutch 2 bidirectional locking clutch 20 casing 21 outer casing 22 inner casing 23 second rotary shaft 24 roller holder 25 roller member 26 spring Member 27 Fixed plate 3 Rotating lid 4 Main body 200 Drawer 210 Main body

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location F16C 11/10 A 8508-3J G10C 3/02 B 6821-5H

Claims (5)

[Claims] 1. An open / close operation support mechanism for supporting the open / close operation of an open / close body that is opened / closed by gear transmission with respect to a stationary part, wherein a hollow rotary shaft rotatably loaded in an outer cylinder via a viscous liquid. A first rotary shaft that is inserted into the hollow portion of the hollow rotary shaft and has a first gear connected to a projecting portion that projects outward from the outer cylindrical body; and the hollow rotary shaft. A one-way clutch interposed between the first rotating shaft and the first rotating shaft, wherein the first gear is different from the gear for the opening / closing body or the stationary portion provided at an appropriate position of the opening / closing body or the stationary portion. The one-way rotary damper, which is fixed to the immovable part or the opening / closing body so as to be meshed with the casing, prevents rotation in the other direction when rotatable in one direction, and prevents the other direction from rotating. To give a rotating torque above a certain level The second rotation arranged so as to partially rotate from the casing so that the rotation in one direction can be prevented unless rotation torque of a predetermined value or more is applied. Axis and
A second gear having a second gear connected to the protruding portion of the second rotating shaft, and a second gear with respect to the gear for the opening / closing body or the stationary portion provided at an appropriate position of the opening / closing body or the stationary portion. And a bidirectional locking clutch which is fixedly provided to the immovable portion or the opening / closing body so as to mesh with each other, and an opening / closing operation support mechanism for the opening / closing body. 2. The bidirectional locking clutch has a substantially annular roller holder having a roller holding groove formed in a notch at a proper position on an inner peripheral portion, and a substantially elliptical shape having a width wider than the roller retaining groove at a proper position on an inner peripheral portion. A substantially annular fixing plate fixed to the casing adjacent to the roller holder and having a roller insertion groove formed so that the groove bottom substantially central portion slightly protrudes inward. The roller member inserted through the roller holding groove of the roller holder and the roller insertion groove of the fixed plate, and the spring holding groove formed at an appropriate position of the roller holder are loaded to rotate the roller holder. The spring member for restricting the range, the roller holder and the central hole of the fixed plate are inserted so as to be rotatable relative to the casing, and a part of the spring member is projected to the outside of the casing. The opening / closing operation support mechanism for an opening / closing body according to claim 1, further comprising a second rotating shaft and a second gear connected to the second rotating shaft. 3. The opening / closing operation support mechanism for an opening / closing body according to claim 1, further comprising an elastic member capable of constantly urging the opening / closing body in an opening or closing direction. 4. The opening / closing operation support mechanism for an opening / closing body according to claim 1, wherein the opening / closing body is a rotating body that opens and closes around a rotation axis. 5. An opening / closing operation support mechanism for an opening / closing body according to claim 1, wherein the opening / closing body is a substantially box-shaped drawer.