JPH0710575U - Opening / closing member operation shock absorber - Google Patents

Abstract

(57) [Abstract] [Purpose] Damping the momentum of the rotation of the opening / closing member to prevent the occurrence of impact due to rapid rotation. [Structure] Opening / closing member 1 hinged to a base frame member 11
2 is provided with a connecting member 13 that supports the load. One end of the connecting member 13 is pivotally supported on the base frame member 11, and the other end is pivotally supported on the opening / closing member 12. Further, the casing 14 of the rotary damper 16 having the rotary shaft 15 which is rotatable with respect to the casing 14 and exerts different rotational torques depending on the direction of rotation is attached to the base frame member 11, and the rotary shaft 15 is connected. It is attached to an arm so that the opening / closing member 12 closes gently.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for reducing or cushioning the operation of an opening / closing member, and more particularly to a device for cushioning the opening / closing operation of an opening / closing member such as a lid for an underfloor storage.

[0002]

[Prior art]

 It is now common to provide the above-mentioned underfloor storage from the viewpoint of effective use of the living space, but the lids and doors of the conventional storage are often simply detachable or hinged so that they can be opened and closed. . For this reason, if the hand is released from the lid during opening / closing, especially during the closing operation, it may drop suddenly due to its own weight, which may cause shock and noise, which may cause an accident such as a limb being caught.

[0003]

[Problems to be solved by the device]

 The present invention has been made by paying attention to the above point, and its problem is to dampen the momentum of its operation when the opening and closing member such as the lid rapidly rotates due to gravity. The purpose of this is to prevent the occurrence of impacts and to prevent accidents even if some external force is applied during rotation of the opening / closing member.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention relates to an opening / closing member 12 rotatably attached to a base frame member 11 by connecting both members 11 and 12 with a connecting member 13 so as to be rotatable and rotatable relative to a casing 14. The casing 14 of the rotary damper 16 provided with the rotary shaft 15 that exhibits different rotational torques depending on the direction is reversed is attached to the base frame member 11 or the opening / closing member 12, and the rotary shaft 15 is attached to the connecting arm 13. It is a thing.

[0005]

【Example】

 1 to 5 relate to a first embodiment of the present invention, in which a base frame member 11 is a frame-shaped portion provided at an opening of an underfloor storage, and an opening / closing portion. The member 12 corresponds to a single-opening type door for opening and closing the opening. The open / close member 12 is rotatably attached to one side of the base frame member 11 by using a hinge 17 on one side thereof, and when closed, is supported by a step portion 18 inside the base frame member 11 to support the base frame member 11. A plane substantially the same as the upper surface of 11 is formed. Reference numeral 19 denotes a set screw of the hinge 17.

The communication arm 13 is provided between the opening / closing member 12 and the base frame member 11 so that the opening / closing operation of the opening / closing member 12 can be controlled. The illustrated connecting arm 13 includes a pair of left and right. The length of the connecting arm 13 is set so that the maximum opening angle of the opening / closing member 12 can be set to a sufficiently large value, and the side edges of the opening / closing member 12 and the side edges of the base frame member 11 when opening to the maximum opening angle are fixed. The respective attachment parts of the communication arm 13 are set to the positions. Therefore, an arm sliding opening 20 is formed in the step portion 18.

In the illustrated example, the connecting arm 13 has an engaging port 21 for axial support at one end on the base frame member 11 side, and a long slot 22 that reaches the other end of the arm on the opening / closing member 12 side. It is formed so as to be rotatably supported by the base frame member 11 at the engaging port 21 at one end thereof, and rotatable at the opening / closing member 12 at the other long hole 22 so as to be slidable in the direction of the long hole. It is a supporting structure.

The axial fulcrum A of the opening / closing member 12 and both axial fulcrums B and C of the connecting arm 13 correspond to an increase in load accompanying the rotation of the opening / closing member 12 by setting them as follows. Rukoto can. That is, the length L2 between the shaft fulcrum A of the hinge 17 and the shaft fulcrum B of the opening / closing member 12 is constant, while the length L1 between the shaft fulcrum B and the shaft fulcrum C of the rotary shaft 15 is opened and closed. It is set so that it becomes gradually shorter on the closed side of the member 12. When the load applied to the shaft fulcrum B is W and the angle formed by the opening / closing member 12 and the base frame member 11 is θ, the torque due to the load of the opening / closing member 12 is expressed by T = L2cos θ × W, which is θ Increases as becomes smaller. On the other hand, the torque of the rotary damper 16 is constant, and as the length L1 gradually decreases on the closing side of the opening / closing member 12, the load supported by the rotary damper 16 increases. That is, since the torque T1 of the damper 16 is represented by T1 = L1 × Wcosθ, the decrease in the length L1 is balanced with the increase in Wcosθ. Therefore, the rotation speed of the closing member 12 does not increase remarkably, and the closing member 12 operates smoothly all the time.

A rotary damper 16 is provided in one of the pivotally supporting portions that pivotally support the connecting arm 13 to the base frame member 11 or the opening / closing member 12. In the case of the first embodiment, the rotary damper 16 has the casing 14 and the rotary shaft 15 rotatably incorporated in the chamber thereof, and is a viscous fluid called torque grease or the like enclosed in the chamber of the casing 14. A movable valve 23 that changes the magnitude of the flow resistance of G according to the direction of rotation is used (see FIGS. 2 and 3). The movable valve 23 forms a passage 24 through which a fluid easily passes and a passage 25 through which a fluid does not easily pass in the front and rear of the rotating direction, and one of the movable valve 23 and the valve opening 26 of the rotary shaft 15 overlaps with each other to generate a different rotational torque. . The rotary shaft 15 is supported by a support shaft 27 protruding into the casing 14. 28 is a cap and 29 is a seal ring.

The rotary damper 16 having the above structure is attached to the lower portion of the side of the base frame member 11 with a screw 19, and the angular shaft portion 15 ′ of the rotary shaft 15 is a square hole at one end of the connecting arm 13. After engaging with the engaging port 21, it is prevented from coming off by a stopper 31, and the other part of the connecting arm 13 is connected to the opening / closing member 12 through a support shaft 32. 33 is a set screw at one end, and 34 is a washer at the other part.

The relationship between the position of the valve of the rotary damper 16 and the opening / closing position of the opening / closing member 12 thus assembled is such that when the opening / closing member 12 is rotated so as to be lifted from the closed position to the open position, the torque is increased. A small torque is set so that a large torque will be applied when it is rotated in the closing direction. That is, in the open position shown in FIG. 4, the movable valve 23 has the passage 25 through which the fluid does not easily pass overlap with the valve opening 26 of the rotary shaft 15, so that the opening / closing member 12 is rotated and the opening / closing member 12 is released. A large torque acts when the car is closed by its own weight, so it will be closed gently (Fig. 5). Further, as described above, the increase in torque due to the rotation of the opening / closing member 12 in the closing direction and the damping force T1 of the rotary damper 16 balance each other, so that the torque is maximized when the opening / closing member 12 is closed so that the closed state is maintained. Act on.

The sectional views of the rotary damper 16 shown in FIGS. 4 and 5 show the positions of the rotary shaft 15 and the movable valve 23 corresponding to the positions of the opening / closing members 12 shown in the drawings. From this illustration, it is well understood that the resistance changes depending on the direction of rotation in the viscous fluid.

FIG. 6 and subsequent figures show a second embodiment according to the present invention, which is different in that the connecting arm 13 has a shape curved in the direction opposite to that of the connecting arm 13 of the first embodiment. . Other configurations, for example, the base frame member 11 and the opening / closing member 12 are hinge-coupled, the opening / closing member 12 closes the opening of the base frame member 11 so as to be openable / closable, and one end of the connecting arm 13 is a rotary damper. 16 is different from that of the first embodiment in that the base frame member 11 is pivotally supported via 16 and the other part of the connecting arm 13 is pivotally and slidably attached to the opening / closing member. Since the same may be applied, reference numerals are used, and detailed description will be omitted.

In the case of the second embodiment, since the connecting arm 13 has a configuration in which the connecting arm 13 is bent in the opposite direction to the connecting arm 13 of the first embodiment, the rotation direction of the rotary shaft 15 of the rotary damper 16 is opposite to that of the first embodiment. Become. Therefore, the rotary damper 16 may be of a type that operates in the opposite direction to that of the first embodiment, or the design may be changed so that the rotary damper 16 is used in the opposite direction. Also in the case of the operation shock absorber of the second embodiment, when the opening / closing member 12 is closed, a large torque is exerted so that the opening / closing member 12 can be closed quietly without shock and can be opened lightly without resistance when opening.

In the above two examples, the example in which the rotary damper 16 is attached to the base frame member 11 is shown, and only the example in which the opening / closing member 12 is operated by gravity in the closing direction is shown. Although these are the most common examples, the structure is reversed, for example, the rotary damper 16 is provided on the opening / closing member 12 side, or one end of the communication arm 13 is rotatably supported by the opening / closing member 12 so that the arm is rotatable. The other part 13 is rotatably and slidably provided on the base frame member 11 so that it is engaged with the rotary shaft 15 of the rotary damper 16, and the torque is increased in the opening direction of the opening / closing member 12. However, it is possible to change the design to reduce the torque in the closing direction.

[0016]

[Effect of device]

 Since the present invention is configured and operates as described above, when the opening / closing member such as the lid rapidly rotates due to gravity, the torque can be increased to eliminate the rotational force. As a result, it is possible to prevent the occurrence of impact, and even if some kind of external force is applied during the operation of the opening / closing member, an accident does not occur and safety is improved. Conventionally, this type of shock absorbing device has been of air spring type and gas spring type, but the device of the present invention is low in price and can be used in a space-saving manner as compared with them, and In the closed state, the function of keeping it works, so it has the feature that no locking device is required.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the device of the present invention.

FIG. 2 is a partially cutaway front view showing an example of a rotary damper.

FIG. 3 is a sectional view of the above.

FIG. 4 is an explanatory diagram of an operating state (when fully opened) of the first embodiment.

FIG. 5 is an explanatory diagram of another operating state (when fully closed) of the above.

FIG. 6 is an exploded perspective view showing a second embodiment of the device of the present invention.

FIG. 7 is an explanatory diagram of an operating state (at the time of full opening) of the above.

FIG. 8 is an explanatory diagram of another operating state (when fully closed) of the above.

Claims (3)

[Scope of utility model registration request] 1. A base frame member 11, an opening / closing member 12 rotatably attached to the base frame member, and both members 11, 12 are connected to each other, and a pivotal support is rotatably supported with the base frame member 11 or the opening / closing member 12 at one end. The other part is a connecting arm 13 rotatably and slidably attached to the opening / closing member 12 or the base frame member 11.
And a casing 14 of a rotary damper 16 having a rotating shaft 15 capable of relative rotation with respect to the casing 14 and exhibiting different rotational torques depending on whether the rotational direction is normal or reverse is attached to the base frame member 11 or the opening / closing member 12, An operating shock absorber for an opening / closing member, characterized in that a rotating shaft 15 is attached to a connecting arm 13. 2. The connecting arm 13 has a base frame member 11 at one end.
Is engaged with the rotary shaft 15 of the rotary damper 16 attached to the connecting arm 13, and a long slot 22 is formed in the other portion of the connecting arm 13 along the longitudinal direction. The operation shock absorber for an opening / closing member according to claim 1, wherein the opening / closing member 12 and the communication arm 13 are connected by a movable support shaft 32. 3. The length of a shaft fulcrum A at which the opening / closing member 12 is attached to the base frame member 11 and a shaft fulcrum B at which the connecting arm 13 and the opening / closing member 12 are connected to each other is set to L2, and the connecting arm 13 is rotated by a rotary damper 16. When the length of the shaft fulcrum C attached to the rotary shaft 15 and the shaft fulcrum B is L1, while the length L2 is constant, the length L1 is changed by the movement of the opening / closing member 12 to the closing side. The operation damping device for an opening / closing member according to claim 1, wherein the operation damping device is configured to be gradually smaller.