JPH0561169B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a damper device for a moving support structure that facilitates the movement of heavy objects. The heavy object has a lower end opening that is open toward the installation surface. Examples of such heavy items include storage furniture, and for example, the portion surrounded by the architrave with its lower surface open and the bottom plate that can be opened and closed corresponds to the lower end space here. Here, for storage furniture,
This includes a wide range of items such as chests of drawers, cupboards, bookshelves, cabinets, lockers, etc. In addition, the above-mentioned heavy objects include a vertical piano, an upright vending machine, a decorative installation, and the like.

BACKGROUND ART AND PROBLEMS THEREOF For example, storage furniture is often large and heavy, and once installed, it is often difficult to move it. Some storage furniture is equipped with casters at the bottom end, but this makes the installation unstable, and if the installation surface is a tatami mat or rug, heavy loads will be placed on the casters, making it difficult to install for a long period of time. This is not suitable as it deforms the installation surface. In addition,
Although ease of movement is required for other heavy items as well, it is often not desirable to use moving members such as casters all the time from the standpoint of stability and aesthetics during installation.

In order to meet such demands, the present applicant has developed a system that allows stable installation of heavy objects at all times by using the lower end surface thereof, and when necessary, a moving member is made to protrude from the lower surface of the heavy object to facilitate movement. We have conducted extensive research on support structures for moving heavy objects, and have proposed the following various support structures and devices for movement. A moving member is provided on the lower surface of a movable support that is supported to be able to move up and down with respect to a fixed support fixed within the lower end of the heavy object, and the weight of the heavy object can be adjusted by operating the operating section. A support structure or support for moving a heavy object, the basic structure of which is to lower the movable support member against the lower end of the heavy object so that the moving member projects downward from the lower end of the heavy object and is held by a detent mechanism. (hereinafter, these will be collectively referred to as a support structure for moving heavy objects). To explain an example where these are applied to storage furniture such as a chest of drawers, the fixed support is a frame fixed within the architrave, the moving member is casters,
The operating part is a lever pivoted on a fixed support.
The detent mechanism is formed by a structure that stops the lever at a point slightly past the line of action (consideration point) of the load of the storage furniture on the lever, or by an appropriate stopper. The movable support and its associated actuation mechanism can take a variety of forms, including:

The movable support is a pair of arms each having one end pivoted to the fixed support and extending in directions facing each other, and cooperates with the lever to descend around the pivot portion by rotation of the lever ( Jitsugan Showa 61
-158025, 61-161740, 61-162875, etc.), a horizontal member in which the movable support pair engages both ends with parallel oblique grooves provided on both sides of both ends of the frame (fixed support). A movable support body that is guided by the groove and moves down while maintaining a horizontal position by rotating the lever in cooperation with the lever (Utility Application No. 179855, 1983, 187269, etc.). a horizontal member guided in the vertical direction by a fixed support; in addition, a slide member cooperating with the lever and guided in the horizontal direction by the fixed support is provided above the movable support; Both ends of the member and both ends of the movable support are connected by short links to form a four-bar rotation parallel link mechanism, and the movable support is lowered by horizontal movement of the slide member as the lever rotates ( Jitsugan Sho 62-70697, same
62−326219 etc.).

However, none of these support structures is equipped with a mechanism that prevents the movable support from returning from the lowered position. ), resulting in damage to stored items and damage to hands and fingers due to lever recoil.

This problem arises not only when the moving support structure is applied to storage furniture, but also when applied to other heavy objects, and a solution has been required.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the prior art and to provide a device that is used for a support structure for moving heavy objects and can prevent a movable support from returning suddenly from a lowered position. do.

Means for Solving the Problems The object of the present invention is to provide a moving member on the lower surface of a movable support that is supported to be movable up and down with respect to a fixed support that is fixed to the lower end of a heavy object. The heavy object is configured to lower the movable support body against the weight of the heavy object by operating the part to cause the moving member to protrude downward from the lower end of the heavy object and to be held by a detent mechanism. A damper device for a movable support structure, comprising: a support shaft supported by the fixed support or the movable support; a ratchet engagement gear pivotally attached to the support shaft; and the operating portion of the support structure. is connected to the operating portion so as to move with the movement of the movable support, and moves in a non-meshing state with respect to the ratchet engagement gear when the movable support is lowered, and when the movable support returns from the lowered position. a ratchet member having ratchet teeth oriented so as to return in mesh with the ratchet engaging gear; and a ratchet member coupled to the ratchet engaging gear rotatably attached to the support shaft via a speed increasing transmission. a rotating member having a floating member supported movably in a radial direction with respect to a connecting portion to the support shaft; and a floating member fixed to the fixed support pair or the movable support. This is achieved by a damper device for a support structure for moving a heavy object, characterized in that the damper device includes a contact member that applies a restraining force against the rotation of the rotating member through contact with the member.

According to one embodiment of the damper device of the present invention, the fixed support body is in the form of a frame, the movable support body is movable up and down while being translated in parallel under the guidance of the fixed support body, and the operation portion is a lever device having a fulcrum on one of the fixed support and the movable support and a point of action on the other.

According to another embodiment of the damper device of the present invention,
The fixed support is in the form of a frame, and the movable support has a connection that is pivotally attached to both ends of the movable support and the fixed support, and forms a four-bar parallel rotation chain with these supports. The operation section is movable up and down while being translated in parallel by a link, and the operating section includes a slide member guided in a substantially horizontal direction by one of the supports, and a fulcrum on the other of the supports. It is assumed that the lever device is provided with a lever device that acts to cause horizontal movement.

According to yet another embodiment of the damper device of the present invention, the fixed support is in the form of a frame, and the movable supports are each supported vertically movably by shafts at both ends of the fixed support. The operating portion is a lever device having a fulcrum on the fixed support and acting on the arm device to move the arm device up and down.

Embodiments Hereinafter, an example in which the present invention is applied to storage furniture will be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal side view of the lower part of the wardrobe with a support structure for movement and a damper device therefor, and FIG. 2 is a side view thereof. The moving support structure is usually provided on both the left and right sides of the storage furniture, but the figure shows only one of them.

First, the movable support structure will be explained. This movable support structure consists of a fixed support body 2 fixed to the inner surface of the architrave D of the storage furniture, and a movable support body 1 guided in the vertical direction by the fixed support body. , and a slide member 3 guided in the horizontal direction by a fixed support 2, which have a rectangular shape in plan view and are arranged one above the other with their longitudinal direction being the depth direction of the storage furniture. The moving support structure further includes connecting links 5 provided on both side surfaces at both ends of the supports 1 and 2, and a lever 6 coupled to the fixed support 2 and the slide member 3 and rotated manually. ing. The fixed support body 2 has both end surfaces 20
is fixed to the inner surface of the architrave D, and includes an upper wall 21 and a side wall 22 extending in the longitudinal direction. In order to guide the movable support 1 in the vertical direction, the fixed support 2
As shown in the figure, a part of the end face 20 is bent perpendicularly to the inner surface of the architrave D to form a guide piece 23.
Two grooves 24 for lever insertion are provided in the upper wall 21 in parallel with the longitudinal direction of the fixed support, and grooves 25 for guiding the slide member are provided substantially horizontally in both ends of the side walls 22. The movable support 1 is a fixed support 2
The upper wall 10 has a length that lightly touches the inner surface of both ends of the upper wall 10.
and a side wall 11, and a guide piece 23 on the upper wall 10.
A notch 12 is formed into which it fits, and it can be guided and moved in the vertical direction based on these. The upper wall 10 has a small notch 1 that provides support in the horizontal direction while passing the tip of the lever 6 (described later).
5 is provided. The slide member 3 has a width that fits within both side walls of the fixed support 2, and includes an upper wall 30 and a side wall 31 that extend in the longitudinal direction. A tension spring 7 is stretched between the fixed support and the movable support on their side walls. The connecting link 5 is
The lower end is rotatably connected to the side wall 11 of the movable support 1 and the upper end to the side wall of the slide member 3, respectively, and the connecting links 5, 5 are arranged parallel to each other. The connection link 5 is attached to the slide member 3 by a shaft 50. The lever 6 is made by connecting two elongated plates 60 in parallel with each other with a connecting rod 61.The lever 6 is rotatably supported by a shaft 50 at the middle portion near the tip, the tip portion extends toward the slide member, and the proximal end portion is rotatably supported by a shaft 50. It extends through the groove 24 in the fixed support 2 and above the fixed support, and can be pulled and rotated to raise the proximal rod 62 from a generally horizontal position. The tip of the lever 6 contacts the edge of the cutout 15 of the movable support 1 at a position where the lever 6 has raised the rod 62 to some extent from the horizontal position as shown in FIG. While sliding downward on the edge of the notch 15, the edge is pressed with a horizontal force, and based on the reaction force, the slide member 3 is slid using the contact portion with the edge of the notch 15 as a fulcrum. A moving member 4 is attached to the bottom surface of the upper wall 10 of the movable support. The moving member 4 is a swivel caster in this embodiment, and the movable support 1
There are four in total installed near both ends of the. Of course, the moving member may be constructed as appropriate, such as by using a sliding plate with a bottom surface coated with fluorine resin or a smooth metal surface. The connecting link 5 changes from the state shown in FIG. 1 to the state shown in FIG.
is rotated so that the slide member 3 stands up when it slides, and the movable member 4 is provided so as to protrude downward from the architrave D as the movable support member descends accordingly. The connecting link 5 is
When the lever 6 is rotated to its maximum extent, it reaches a position slightly past the vertical direction. A small piece 51 is provided on one side of the connecting link 5 and comes into contact with the upper surface of the movable support 1 when it reaches this upright position. In this way, the connecting link 5 reaches a position slightly past the vertical direction, that is, a position slightly past the consideration point, and is stopped by the small piece 51 at this position, so that the connecting link is reversed, that is, the movable support 1 It constitutes a detent mechanism against rising after descending.

Therefore, according to this moving support structure, the moving member 4 is normally moved with the lever 6 in the position shown in FIG.
can be stored in the architrave D, and a normal installation state of storage furniture can be obtained. When moving the storage furniture, the lever 6 is rotated to the position shown in FIG. 3. A portion of the bottom plate of the storage furniture is removable to enable this rotational operation. The force required to rotate the lever 6 is reduced by the lever action, and furthermore, the rotation is facilitated based on the change in the amount of slippage, which will be explained below.

That is, at the beginning of the rotation of the lever 6, the amount of slippage of the tip of the lever 6 against the edge of the notch 15 is large, and as the rotation progresses and approaches the upright state, the amount of slippage decreases. This is reflected in Figure 4, which shows the initial state of rotation, and Figure 5, which shows the state approaching the standing position.
It will be understood from the figure.

As the slide member 3 slides due to the rotation of the lever 6 and the connecting link 5 rises accordingly,
The movable support 1 is lowered together with the moving member 4. Since the movable support 1 is vertically guided by the fixed support 2 as described above, the moving member 4 projects from within the architrave D in the vertical direction. In other words, the main body of the storage furniture is lifted vertically. After the moving member 4 is projected, a detent mechanism constructed based on the connecting link 5 maintains the projecting state of the moving member against the gravity of the storage furniture. Therefore, the storage furniture can be easily moved with a small force based on the moving member 4. In order to return the moving member 4 from the protruding position, the lever 6 may be rotated from the state shown in FIG. 3 to the state shown in FIG. 1. Based on this, the connecting link 5 rotates in the opposite direction to the above-mentioned direction and passes through the consideration point again to release the detent effect, and by the operation opposite to the above-mentioned movement, the movable support 1 rises vertically and becomes movable. The member 4 is stored in the architrave D. That is, the storage furniture is vertically lowered to its normal installed state.

As a structure for guiding the slide member 3 in the horizontal direction, various forms including grooves, rails, and members that engage with these can be adopted instead of the groove 25, and the shaft 50 of the connecting link can also be provided on the movable support 1 separately from the member for guiding the movable support 1. Further, as a detent mechanism, through holes are provided in the fixed support body 2 and the lever 6 that coincide with each other when the lever 6 is in the upright position, and pins are inserted into these through holes when the lever 6 is in the upright position to prevent detents. may be adopted as appropriate. In addition to these detent mechanisms, a holding piece E as shown in FIG. 3 can also be provided on the fixed support 2. This holding piece E is formed of a flexible member so as to elastically hold the connecting rod 61 of the lever 6 when the lever 6 is rotated to the upright position.

In contrast to this moving support structure, an example of the damper device of the present invention is configured as follows.

As shown in the attached state in FIGS. 1 and 2 and in detail in FIGS. 6 and 7, the damper device 100 includes a pair of support plates 110 hanging from the upper wall 21 of the fixed support 2. , a support shaft 120 is attached between the support plates. Each upper wall 10, 30 of the movable support 1 and the slide member 3 is provided with a window through which the support plate 110 passes. A ratchet engagement gear 130 and a large gear 141 are fixed to the support shaft 120. A shaft 150 is attached to the side wall 31 of the slide member 3, and a ratchet member 151 having a spring force applied to the ratchet engaging gear 130 by a spring 152 is pivotally supported on the shaft. Ratchet teeth are provided on the contact surface of the ratchet member 151 with the ratchet engagement gear. The ratchet teeth 153 are in a non-meshing state with the ratchet engagement gear 130 when the slide member 3 moves to the right together with the shaft 150 in FIG. 6 (when the movable support 1 descends), and the slide member 3 The orientation of the ratchet teeth is determined so that when the movable support 1 moves to the left together with the shaft 150 (when the movable support 1 returns), the ratchet teeth move in mesh with the ratchet engaging gear. Another shaft 160 is attached between the support plates 110 in parallel to the support shaft 120, and a rotating member 170 and a small gear 146 integrated therewith are attached to the shaft 160. The shaft 160 further includes pinion gears 14 integral with each other.
2 and 143 are rotatably attached to the gear 146. Due to these, the ratchet engagement gear 1 based on meshing with the ratchet member 151
30 is transmitted to the rotating member 170 via the large gear 141, the small gear 142, the large gear 143, the small gear 144, the large gear 145, and the small gear 146.
Gears 141 to 146 thus form a speed increasing transmission 140 from the ratchet engagement gear to the rotating member. As shown in FIGS. 8 and 9, the rotating member 170 includes a flange 172 integrated with the small gear 146 on the shaft 160, and a flange 172 that is rotatably supported along the surface of the flange. A pair of floating members 173 are provided. The floating member 173 extends in the circumferential direction from the shaft support and is formed to rotate in the radial direction based on centrifugal force as the flange 172 rotates. A contact member 180 is fixed to the support plate 110 concentrically with the shaft 160. The contact member has an annular side wall 181, contacts the floating member 173 on its inner surface, and serves to suppress rotation of the flange 172 based on the frictional force acting between the two. The floating member and the contact member are
It is made of various materials that generate such restraining force due to frictional contact, such as polyamide, acetal, synthetic resin, metal, and the like. Although the floating member 173 may be rotated in any direction, it is preferable to rotate it in the direction indicated by the arrow in FIG. 8 for smooth operation.

According to this damper device, the following effects can be obtained. When the movable support 1 is lowered by raising the lever 6, the ratchet member 151 moves relative to the ratchet engagement gear in a non-meshing state, so the damper device 100 does not hinder the movement of the movable support pair 1 in any way. When the lever 6 is tilted from the upright position, the ratchet member 151 moves to the left from the position shown in FIGS. 6 and 7 as the slide member 3 slides, and meshes with the ratchet engagement gear. Rotate the gear. The rotation causes rotating member 170 to rotate at a higher speed via speed increasing transmission 140. As the floating member 173 rotates, the floating member 173 rotates while being strongly pressed against the contact member 180 by centrifugal force, and an increase in rotational speed is suppressed by the frictional force. This suppressing force increases as the rotational speed of the rotating member 170 increases and the centrifugal force acting on the floating member 173 increases, so the rotational speed is extremely effectively suppressed, and the storage furniture is heavy. Sometimes it descends slowly.

Next, an example in which the damper device of the present invention is applied to another type of support structure for moving heavy objects will be described.

FIG. 10 is a longitudinal cross-sectional view of a wardrobe in which a moving support structure is housed and attached to an architrave, and FIG. 11 is a cross-sectional view thereof. This mobile support structure is
It comprises an arm device 8 and a lever 3 mounted in a frame 2 which is a fixed support. The frame 2 has a rectangular box shape in plan view with open upper and lower sides, and is fixed to the inner surface of the architrave D with screws. The arm device 8 has shafts 80 at the front and rear ends of the frame.
A first arm 80 and a second arm 8 whose proximal ends are supported by 0,810 and are rotatable in the vertical direction
1 and a moving member 4 attached to these arms. The first arm 80 and the second arm 81 have support portions 801 and 811 that are approximately horizontal when the moving member 4 is in a state of protruding downward from the frame 2, as shown in FIG. The pressure receiving portions 802 and 812 are each provided with pressure receiving portions 802 and 812 that bend and extend downward toward the distal end side. In this embodiment, further spiral springs 8 are attached to the shafts 800 and 810.
03 and 813 are attached, and the arms 80 and 813 are attached with both ends brought into contact with the inner wall of the frame 2 and the arms 80 and 81.
It acts to lift 81. The moving member 4 is attached to the lower surface of each arm support section 801, 811. The lever device 9 includes a lever 90 supported by a shaft 900 substantially above the tip of the first arm 80, a rotor 91 supported by a shaft 910 substantially above the tip of the second arm 81,
A connecting member 92 that connects the lever 90 and the rotor 91 is provided. The lever 90 is a pair of plates 901, 901 connected by rods 902, 903, and the shaft 900 is connected to each plate 901.
and the frame. The lever 9 has a long operation part 904 from the shaft support of the shaft 900 to the rod 902, and a short operation part 905 from the shaft support to the rod 903. They form an obtuse angle with each other. The lever 90 is an operating section 904
The actuating portion 905 is arranged so as to extend upward when the arm is tilted toward the second arm 81 so that it is approximately horizontal (see FIG. 12), and a stopper pin 906 for maintaining this posture is attached to the frame 2. installed on. The lever 90 is rotatable from the tilted position to the side where the operating part 904 stands up.
03 to push down the pressure receiving portion 802 of the first arm. As is clear from FIG. 12, the shape of the pressure receiving part 802 is determined so that the distance from the lever shaft 900 becomes shorter toward the tip when the moving member 4 is stored, and based on this, the rotation of the actuating part 905 is determined. Accordingly, the first arm 80 is pushed down. In this embodiment, the rod 903 is further locked when the actuating section 905 reaches a position slightly past the point (dotted chain line A in FIG. 10) corresponding to the reaction force from the pressure receiving section 802. A locking portion 804 is provided by bending the tip of the first arm 80, and this structure forms a detent mechanism. The rotor 91 is
A pair of plates 911, 911 are connected by a rod 912, and a shaft 910 connects each plate 91.
1 and frame 2. The connecting member 92 is provided to extend between rods 920 and 921 provided on the lever 90 and the rotor 91, and is adapted to transmit rotation of the lever 90 to the rotor 91. When the rotor 91 is rotated in this manner, the rod 912 is brought into contact with the pressure receiving portion 812 of the second arm, thereby causing the second arm 8
1 is pressed down. Therefore, the shape of the second arm 81 and the shape of the detent mechanism by the locking part 814 at the point of consideration (FIG. 10B) passing position are as follows:
This is the same as described for the first arm 80. In this way, both the first arm 80 and the second arm 81 move the lever 90 to the tilted position (FIG. 12).
By rotating from the position to the standing side (Fig. 10),
They are each pushed down by the rod 804 of the actuator and the rod 814 of the rotor, and held in the depressed position by the aforementioned detent mechanism. When the lever 90 is reversely rotated from the upright side, the detent is released by passing the above-mentioned consideration point again, and when the lever 90 is returned to its original tilted position, the pressing down on the arms 80 and 81 is released. The moving member 4 is configured to protrude downward from the frame 2 against the weight of the chest when the arm is pressed down, and can be lifted inward of the frame 2 when the arm is released.
Therefore, by attaching the frame 2 at an appropriate height within the architrave, the moving members 4, 4 can be made to protrude from the lower surface of the architrave D and to be accommodated within the architrave. In addition, in this embodiment, the torsion springs 803 and 813 bias the arms 80 and 81 so that they are housed inward of the frame, so that even when the chest of drawers is lifted, the moving members 4 and 4 are lowered by their own weight. It is designed so that it can be fastened within the architrave without any damage. Further, a portion of the bottom plate of the chest of drawers is removable so that the lever 90 can be rotated manually.

In contrast to this moving support structure, a second example of the damper device of the present invention is configured as follows.

A support plate 110 is fixed to the frame 4, a support shaft 120 is attached to the support plate 110, and a rotating member 170 is attached to the other shaft 160. The rotation of the ratchet engagement gear on the support shaft 120 is transmitted to the rotating member 170 via the speed increasing transmission 140 consisting of large and small gears, and the rotation of the floating member in the rotating member is caused by frictional contact with the contact member 180. As in the previous example, the structure is such that the increase in rotational speed of the rotating member is suppressed. In this example, the ratchet member 151 is formed in an arc shape centered on the shaft 900 of the lever 90, one end of which is pivotally supported by a coupling shaft 920 between the lever 90 and the connecting member 92, and the ratchet member 151 is rotated by a torsion coil spring 154. A spring force is applied to the engagement gear 130. The ratchet teeth 153 are provided on the outer periphery of the ratchet member 151, and when the lever 90 is raised (the arm 8
It is provided in such a direction that it moves in a non-engaged state to the ratchet engaging gear 130 during the downward movement (0, 81), and engages the ratchet engaging gear 130 during reverse operation.

Therefore, in this example as well, when lowering the arms (movable support pair) 80 and 81, as in the previous example,
The damper device 100 does not restrict its movement in any way, and when the arms 80 and 81 return, the ratchet member 151 and the ratchet engagement gear 13
0, the rotating member 170 is rotated and brought into frictional contact with the contact member 180, thereby suppressing an increase in its rotational speed. FIG. 13 shows an example using a different ratchet member from the second example.
The ratchet member 151 is linear in this example, and is connected to the connecting shaft 920 between the lever 90 and the connecting member 92.
One end is pivotally supported by a torsion coil spring 154, and a spring force is applied toward the ratchet engagement gear. The ratchet teeth are provided on the lower surface of the ratchet member, and the orientation of the gear is determined so that the ratchet engaging gear moves in a non-meshing state when the lever 90 is upright and in a meshing state when the lever 90 is tilted. In this example as well, similarly to the previous examples, the rotational speed increase suppression effect based on the rotating member 170 can be obtained.

In addition to the above examples, the rotating member and the contact member in the damper device can have various forms as described below.

In the example shown in FIGS. 14 and 15, the rotating member 170a is the small gear 146 of the speed increasing transmission.
Four rings 173a are attached to a flange 172a integrated with the flange 172a so as to be movable in the radial direction and rotatable at respective positions. The contact member 180a is fixed to the support plate 110, and the inner surface of the annular side wall thereof is provided with a protrusion 181a that protrudes to such an extent that the ring 173a can come into contact with and separate from the contact member 180a depending on the radial position.

According to the damper device equipped with these rotating members and contact members, the rotation of the flange 172a due to the rotation of the ratchet engagement gear causes the ring 17 to rotate.
3a moves outward in the radial direction based on the centrifugal force and collides with the protrusion 181a. This collision suppresses an increase in the rotational speed of the rotating member. In particular, as the rotational speed increases, the centrifugal force of the ring 173a increases, so that the impact force upon collision with the protrusion 181a increases, and the restraining force against rotation of the rotating member increases.
Its action becomes more effective.

In the example shown in FIGS. 16 and 17, the rotating member 170b is connected to the shaft 1 on the support plate 110.
60 and integrated with the small gear 146 of the speed increasing transmission, a ball 173b supported by the flange, and a friction plate 181b. On the outer periphery of the flange 172b, there is a recess 17 with a circular cross section and an axis that extends outward from the center toward the friction plate 181b.
4b is formed, and a ball 173b is loosely fitted into the recess. The friction plate 181b has a friction surface on the support plate 110 side, and is fitted so as to rotate with the shaft 160 and to be movable in the axial direction. The contact member 180b is connected to the support plate 1
10, and a disc spring 183b that presses the friction plate toward the rotating member via the small ball 182b.

Therefore, according to the damper device equipped with these rotating members and contact members, the ball 173 is rotated by the rotation of the rotating member accompanying the rotation of the ratchet engagement gear.
b moves outward in the recess 174b and toward the friction plate 181b based on the centrifugal force, and the friction plate 181
b against the disc spring 183b and the support plate 110
Press firmly. Then, due to the friction between the friction plate 181b and the support plate 110, the rotating member 170b
The increase in rotational speed is suppressed. Since the centrifugal force acting on the ball 173b increases as the rotational speed of the flange 172b increases, the pressing force exerted by the ball 173b on the friction plate 181b and the accompanying frictional force also increase, providing an effective deterrent effect.

As described above, the rotating member in the damper device of the present invention is a floating member supported movably in the radial direction with respect to the shaft supported by one of the fixed support and the movable support in the support structure for moving heavy objects. The contact member may have various forms that are fixed to the one support body and have the function of applying a restraining force against rotation of the rotating member through contact with the floating member.

In the above example, the rotating member and the contact member were supported by a fixed support, but these members could also be supported by a movable support, and in this case also, the ratchet member would act as described above with respect to the rotating member. It works the same way.

Effects of the Invention As is clear from the above description, according to the present invention, it is possible to provide a support structure for moving heavy objects that has the following effects. In other words, a rotating member that interlocks with a ratchet engagement gear attached to one of a fixed support and a movable support in a support structure for moving heavy objects is a floating member that is strongly pressed against a contact member by centrifugal force during rotation. The ratchet engaging gear meshes with the ratchet member and rotates only when the movable support returns from the lowered position, so the lowering of the movable support is smooth and the return is smooth. can be carried out in a state where it is prevented. In particular, since the floating member is more strongly pressed against the contact member as the rotational speed of the rotating member increases, the rotation restraining force also increases, and rapid movement is effectively prevented. Therefore, when applied to a moving support structure attached to storage furniture, etc., the storage furniture lifted by the moving support structure can be lowered slowly without being affected by the weight of the stored items. can.

[Brief explanation of drawings]

The figure shows an embodiment of the present invention, and FIG.
A longitudinal side view showing the damper device of the embodiment together with a support structure for moving heavy objects and storage furniture, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a longitudinal side view showing a state in which the moving member protrudes from the state shown in FIG. 1. Figures 4 and 5
The figure is a longitudinal side view showing the main parts of the initial and advanced states of lever rotation in the moving support structure, and FIG. 6 is a longitudinal side view showing details of the damper device together with a part of the moving support structure. , FIG. 7 is a bottom view thereof, FIG. 8 is a side view of the main parts of the damper device, FIG. 9 is a longitudinal sectional front view thereof, and FIG. 10 is another example of a support structure for moving another example of the damper device. FIG. 11 is a cross-sectional view thereof, FIG. 12 is a longitudinal side view showing a state in which the moving member is stored from the state shown in FIG. 10, and FIG. 13 is a further view of the damper device. FIG. 14 is a side view showing the main parts of another example of the damper device, FIG. 15 is a vertical front view thereof, and FIG. 16 is the damper device. FIG. 17 is a side view of a main part of still another example of the present invention, and FIG. 17 is a longitudinal sectional front view thereof. 1...Movable support body, 2...Fixed support body, 3...
Slide member, 4... Moving member, 6... Lever, 100, 100a, 100b... Damper device, 110... Support plate, 120... Support shaft,
130... Ratchet engagement gear, 140... Speed-up transmission, 170, 170a, 170b... Rotating member, 172, 172a, 172b... Flange, 173, 173a, 173b... Floating member,
180, 180a, 180b... contact member, 18
1... Annular side wall, 181a... Protuberance, 181
b...Friction plate, 183b...Disc spring.

Claims (1)

[Scope of Claims] 1. A moving member is provided on the lower surface of a movable support that is supported to be able to move up and down with respect to a fixed support that is fixed within the lower end of the heavy object, and the heavy object can be moved by operating the operating section. a damper for a support structure for moving a heavy object, configured to lower the movable support member against the weight of the object, project the moving member downward from the lower end of the heavy object, and hold it by a detent mechanism; The apparatus comprises: a support shaft supported by the fixed support or the movable support; a ratchet engagement gear pivotally attached to the support shaft; is connected to the operating portion, moves in a non-meshing state with the ratchet engaging gear when the movable support is lowered, and meshes with the ratchet engaging gear when the movable support returns from the lowered position. a ratchet member whose ratchet teeth are oriented so as to return to the original state; and a rotary member which is pivotally attached to the support shaft and connected to the ratchet engagement gear via a speed increasing transmission, the rotary member comprising a floating member supported for radial movement relative to the connection to the shaft; and a floating member fixed to the fixed or movable support and capable of resisting rotation of the rotary member by contact with the floating member. 1. A damper device for a support structure for moving a heavy object, comprising a contact member that provides a deterrent force. 2. The fixed support is in the form of a frame,
The movable support is movable up and down while being guided by the fixed support, and the operating portion has a fulcrum on one of the fixed support and the movable support, and a point of action on the other. 2. The damper device according to claim 1, wherein the damper device is a lever device having: 3. The fixed support is in the form of a frame,
The movable support body is pivoted on both ends of the movable support body and the fixed support body, and is movable up and down while moving in parallel by connecting links that together with these supports constitute a four-bar parallel rotation chain; The operation section includes a slide member guided in a substantially horizontal direction by one of the supports, and a lever device having a fulcrum on the other of the supports and acting on the slide member to horizontally move the slide member. The damper device according to claim 1, characterized in that: 4. The fixed support is in the form of a frame,
The movable support is a pair of arm devices each supported vertically movably by shafts at both ends of the fixed support and extending in directions facing each other, and the operating section has a fulcrum on the fixed support. 2. The damper device according to claim 1, wherein the damper device is a lever device that acts on the arm device to move the arm device up and down.