JP3598969B2 - Prevention device for sudden drop of lifting body - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for preventing a descent of an elevating body, and more particularly to a device for preventing a descent of an elevating body from falling suddenly by its own weight with respect to a fixed body.
[0002]
[Prior art]
Conventionally, a guide member having a guide groove and a slide member having a slide portion that slides in the guide groove with respect to the guide member, the slide member is attached to a fixed body in a vertical direction, There are provided various types in which a guide member is attached to an elevating body so that the height of the elevating body can be adjusted vertically with respect to a fixed body.
[0003]
For example, furniture is provided in which a panel plate is provided at a height adjustable behind a table or desk, and the table or desk is a fixed body, and the panel plate is an elevating body. In this case, in order to adjust the height of the panel plate, the guide member attached to the panel plate is slid up and down with respect to the slide member attached to the back of the table or table top, and the bottom of the guide groove of the guide member is adjusted. In general, a structure is employed in which an adjusting screw with a handle, which is screwed by passing the slide member through a hole or an engagement recess formed at a predetermined height position, is engaged and held.
[0004]
However, when adjusting the height of the panel plate, the panel plate may suddenly drop suddenly due to its own weight at the moment when the adjusting screw is loosened and separated from the hole or engagement recess on the bottom surface of the guide groove. When the panel plate collides with the lower end of movement, the impact may damage the guide member or the slide member. In order to prevent this, the sliding resistance of the guide member and the sliding member was increased, and an elastic buffer member was provided at each predetermined height position. If the movement cannot be performed smoothly and a cushioning member is provided, the suspension will fall under its own weight until it comes into contact with the cushioning member, and this is not a fundamental solution.
[0005]
[Problems to be solved by the invention]
Therefore, in view of the above situation, the present invention seeks to solve the problem. Even if the elevating body suddenly descends with its own weight with respect to the fixed body, the descent of the elevating body is instantaneously stopped, and the elevating body is forcibly moved. An object of the present invention is to provide a device for preventing a descent of an elevating body, which can be lowered by pushing down and can be easily raised by lifting the elevating body.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a guide member having a guide groove, and a slide member having a sliding portion that slides within the guide groove with a maximum separation distance limited to the guide member. Mounting the slide member on the fixed body in the up-down direction, mounting the guide member on the elevating body, forming a recess on the side surface of the sliding portion facing the bottom surface of the guide groove, and A wedge-shaped restricting member having a sliding surface having the same inclination angle as the inclined surface and a pressing surface parallel to the bottom surface of the guide groove is vertically arranged in the recess. Provided movably, when the regulating member is located at the lower portion in the recess, the pressing surface presses the bottom surface of the guide groove directly or through another member, and when the regulating member is located at the upper portion in the recess, the pressing surface presses. Elevating body characterized by not performing To constitute a swoop prevention device.
[0007]
Here, the guide groove of the guide member is formed by forming a guide portion having a narrow groove width of the opening and a large groove width therein, and the sliding member slides in the guide portion. And a mounting portion extending from the sliding portion and protruding from the opening.
[0008]
It is preferable that a pressure contact member formed of a material having a high frictional resistance with respect to the bottom surface of the guide groove is additionally provided on the pressing surface of the regulating member.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 and 2 show a device for preventing a descent of a lifting body according to the present invention. In the drawings, reference numeral 1 denotes a guide member, 2 denotes a slide member, and 3 denotes a regulating member.
[0010]
The device for preventing a descent of a lifting body according to the present invention includes a guide member 1 having a guide groove 4 and a sliding portion 5 having a maximum separation distance with respect to the guide member 1 and sliding in the guide groove 4. And a slide member 2 having the slide member 2 mounted on a fixed body in a vertical direction, the guide member 1 mounted on a lifting body, and a side surface of the slide portion 5 facing a bottom surface 6 of the guide groove 4. A concave surface 7 is formed, and a bottom surface of the concave portion 7 is formed as an inclined surface 8 so as to become shallower as it goes down. A sliding surface 9 having the same inclination angle as the inclined surface 8 and a bottom surface 6 of the guide groove 4 are formed. A wedge-shaped restricting member 3 having a pressing surface 10 parallel to and is provided so as to be freely movable up and down in the recess 7. When the restricting member 3 is located at a lower portion in the recess 7, the pressing member 10 is directly or By pressing the bottom surface 6 of the guide groove 4 through another member, It is obtained without so as not to press the case located in the upper place within 7.
[0011]
More specifically, the guide groove 4 of the guide member 1 is formed by forming a guide portion 12 having a narrow groove width of the opening 11 and a large groove width inside. The sliding member 2 has the sliding portion 5 that slides in the guide portion 12 and an attachment portion 13 extending from the sliding portion 5 and protruding from the opening 11. It is. Here, the guide member 1 is a mold material formed by extruding aluminum or synthetic resin, and the slide member 2 and the regulating member 3 are molded products made of synthetic resin.
[0012]
Further, in the present embodiment, vertically long recesses 14 are formed on the left and right sides of the pressing surface 10 of the regulating member 3, and are formed of a material having a high frictional resistance with respect to the bottom surface 6 of the guide groove 4, for example, silicon rubber or the like. The press contact members 15 are partially fixed in the recesses 14 and 14 respectively. In the present embodiment, the pressing member 15 is attached to the pressing surface 10 of the regulating member 3. However, the pressing member 15 is formed on the pressing surface 10 of the regulating member 3 formed of a hard synthetic resin material. It is also possible to integrally form the resin material by two-color molding. Further, a pressure contact member 15 may be attached to the entire surface of the pressing surface 10 of the regulating member 3, and a fixing means other than the bonding means may be employed for fixing.
[0013]
In the device for preventing a descent of the elevating body according to the present invention, the guide member 1 mounted on the elevating body is relatively positioned in the guide part 12 of the guide groove 4 with respect to the slide member 2 mounted on the fixed body. As shown in FIG. 2A, the regulating member 3 is located at a lower portion in the recess 7 by its own weight, and the pressing member 15 provided on the pressing surface 10 is slid. Is always in contact with the bottom surface 6 of the guide groove 4, so that when the elevating body, that is, the guide member 1 starts to descend by its own weight, the guide is formed by the frictional resistance between the press contact member 15 and the bottom surface 6 of the guide groove 4. Since the regulating member 3 is pushed down along with the member 1 and the sliding surface 9 of the regulating member 3 slides on the inclined surface 8 of the recess 7, the pressing member 15 strongly presses against the bottom surface 6 of the guide groove 4. Of the guide member 1 instantly It is possible to stop down. At this time, if it is set such that a slight gap is formed between the pressing surface 10 and the bottom surface 6 of the guide groove 4 in a state where the regulating member 3 abuts on the lower end in the recess 7, the elevating body That is, even if the guide member 1 is forcibly depressed, the pressing force of the pressing member 15 against the bottom surface 6 of the guide groove 4 does not change, so that the pressing member 15 can be lowered with a predetermined dynamic frictional resistance.
[0014]
As shown in FIG. 2B, when the elevating body, that is, the guide member 1 is lifted, the regulating member 3 moves up in the recess 7 with the lifting member, and the press contact member 15 is moved into the guide groove 4. Is simply in contact with the bottom surface 6 of the camera, and can be easily raised. 2B, the pressing member 15 is shown separated from the bottom surface 6 of the guide groove 4 for the sake of simplicity. However, the pressing member 15 is actually separated from the bottom surface of the guide groove 4 by the weight of the regulating member 3. 6 is in a state of being constantly in contact.
[0015]
Although the slide member 2 can be directly attached to a fixed body, as shown in FIGS. 1 and 2, the slide member 2 is fixed to a bracket 16 and attached to the fixed body via the bracket 16. This is more preferable from the viewpoints of strength and function. At the upper and lower ends and the center of the slide member 2, mounting holes 17,... Penetrating from the sliding portion 5 to the mounting portion 13 are formed. A counterbore portion is formed so that the head does not protrude from the side surface. On the other hand, the bracket 16 made of a metal plate is formed with screw holes 19 into which mounting screws 18 are screwed. Further, a through hole 20 is formed in the upper part of the slide member 2, an adjusting screw hole 22 for screwing an adjusting screw 21 with a handle is formed in the corresponding bracket 16, and an adjusting screw screwed into the adjusting screw hole 22. A screw 21 is passed through the through hole 20 and is engaged with an engaging hole 23 formed in the bottom surface 6 of the guide groove 4 so that vertical movement can be completely restricted.
[0016]
Next, a description will be given of an embodiment of a folding table with a lifting panel employing a device for preventing a sudden drop of a lifting body according to the present invention with reference to FIGS. In the folding table A, the front and rear intermediate portions on both sides of the top plate 24 are vertically rotatable by supporting legs 26 and 26 erected at the rear of a pair of grounding legs 25 and 25 arranged in both front and rear directions. One end of each link member 28 is pivotally attached to a support member 27 attached to the left and right rear ends of the top plate 24, and the other end of each link member 28 is vertically installed on both sides of the front surface of the curtain panel 29. The lower end of both sides of the curtain panel panel 29 is pivotally connected to the two supporting leg rods 26, 26, and the bracket 16 is fixed to both sides of the rear surface of the curtain panel panel 29. The guide member 1 and the slide member 2 are attached to both sides of the panel plate 31 so that the vertical position can be changed. Here, the curtain panel 29 corresponds to the fixed body of the present invention, and the panel plate 31 corresponds to the elevating body of the present invention.
[0017]
More specifically, the panel plate 31 is formed by connecting frame members 32,... And holding the frame members 32 in a substantially rectangular frame when viewed from the front. The vertical frame members 32, 32 are connected by the guide members 1, 1. Make up. Here, on the bottom surface 4 of the guide groove 4 of the guide member 1 as the frame member 32, a plurality of the engaging holes 23 (not shown) are formed at predetermined intervals in the vertical direction, and the adjusting screw 21 is formed. By engaging the leading end of the panel plate 31 with any one of the engagement holes 23, the panel plate 31 whose height has been adjusted can be fixed. In order to securely hold the adjusting screw 21, the adjusting screw 21 is fixed to the upper part on both sides on the front side of the curtain panel 29, and an insertion hole (not shown) opened in the curtain panel 29. ) Is screwed into the adjusting screw hole 22 of the bracket 16. If the adjusting screw 21 is loosened, the height of the panel plate 31 can be adjusted.
[0018]
The support member 27 is a member having a substantially L-shaped cross section. The horizontal plate 27A is screwed and fixed to the lower surface of the top plate 24, and a vertical plate 27B facing upward is formed in a concave portion 34 formed on the rear lower surface of the top plate 24. , And one end of a link member 28 to be described later is pivotally attached to the front and rear central portions of the vertical plate 27B by a horizontal support shaft 35. A roller 36 is provided on the upper end of the link member 28 at the upper end rising in an arc centered on the support shaft 35 from the rear end. Movably connected.
[0019]
Then, when the top plate 24 is in a substantially horizontal use mode, the curtain plate panel 29 hangs down near the rear edge of the top plate 24, and the panel plate 31 is placed behind the curtain plate panel 29. In the upright state (see FIG. 5), when the top plate 24 is raised to be folded, the curtain panel 29 and the panel plate 31 are folded along the upper surface of the top plate 24 (see FIG. 5). (See FIG. 7).
[0020]
【The invention's effect】
According to the first aspect of the present invention, there is provided a device for preventing a descent of an elevating body, comprising: a guide member having a guide groove; and a sliding member which slides within the guide groove with a maximum separation distance being limited with respect to the guide member. A sliding member having a portion, the sliding member is attached to a fixed body in a vertical direction, the guide member is attached to an elevating body, and a recess is formed on a side surface of the sliding portion facing the bottom surface of the guide groove. A wedge-shaped restriction having an inclined surface formed so that the bottom surface of the recess becomes shallower as it goes down, and a sliding surface having the same inclination angle as the inclined surface and a pressing surface parallel to the bottom surface of the guide groove. A member is provided in the recess so as to be freely movable up and down, and when the regulating member is located at a lower portion in the recess, the pressing surface presses the bottom surface of the guide groove directly or via another member, and an upper portion in the recess. When it is located at Therefore, even if the elevating body suddenly drops by its own weight against the fixed body, the descent of the elevating body can be stopped instantaneously, and it is possible to descend by forcibly pushing down the elevating body, If the lifting body is lifted, it can be easily raised.
[0021]
According to the second aspect, the guide member can be slid smoothly and without rattling with respect to the slide member, and the maximum separation distance of the slide member from the guide member is limited due to the relationship between the opening and the slide portion. Thus, the pressing surface of the regulating member can be strongly pressed against the bottom surface of the guide groove.
[0022]
According to the third aspect, the pressing member formed of a material having a large frictional resistance is pressed against the bottom surface of the guide groove, so that the movement of the guide member with respect to the slide member can be reliably restricted.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a device for preventing a descent of a lifting body according to the present invention.
2A and 2B show the assembled state, wherein FIG. 2A is a partial cross-sectional view when the elevating body descends, and FIG. 2B is a partial cross-sectional view when the elevating body rises.
FIG. 3 is a side view of a folding table with a panel employing the present invention.
FIG. 4 is an exploded perspective view of the main part.
FIG. 5 is a partial side view of the usage mode.
FIG. 6 is a cross-sectional plan view of the same.
FIG. 7 is a partial side view of the folding mode.
[Explanation of symbols]
A folding table with panel 1 guide member 2 slide member 3 regulating member 4 guide groove 5 sliding portion 6 bottom surface 7 recess 8 inclined surface 9 sliding surface 10 pressing surface 11 opening 12 guide portion 13 mounting portion 14 recess 15 pressure contact Member 16 Bracket 17 Mounting hole 18 Mounting screw 19 Screw hole 20 Through hole 21 Adjusting screw 22 Adjusting screw hole 23 Engagement hole 24 Top plate 25 Grounding leg 26 Support leg rod 27 Support member 28 Link member 29 Curtain plate panel (fixed body) 30 Support guide 31 Panel plate (elevator) 32 Frame member (guide member)
33 Mounting seat 34 Recess 35 Support shaft 36 Roller

Claims (3)

A guide member having a guide groove, and a slide member having a sliding portion whose maximum separation distance is limited with respect to the guide member and which slides in the guide groove, wherein the slide member is vertically attached to a fixed body. The guide member is attached to the elevating body, and a recess is formed on the side surface of the sliding portion facing the bottom surface of the guide groove, and the bottom surface of the recess is inclined so as to become shallower as it goes downward. Surface, a wedge-shaped regulating member having a sliding surface having the same inclination angle as the inclined surface and a pressing surface parallel to the bottom surface of the guide groove is provided so as to be freely movable up and down in the recess, and the regulating member is provided inside the recess. A descent prevention device for a descent body, wherein the bottom surface of the guide groove is pressed against the bottom surface of the guide groove directly or via another member when positioned at a lower portion, and is not pressed when positioned at an upper portion in a recess. . The guide groove of the guide member has a guide portion in which a groove width of an opening is narrow and a groove width is large in the inside. The slide member includes the slide portion sliding in the guide portion and the slide portion. The device for preventing a descent of a lifting body according to claim 1, further comprising a mounting portion extending from the moving portion and protruding from the opening. 3. The device for preventing a descent of a lifting body according to claim 1, wherein a pressing member formed of a material having a large frictional resistance with respect to the bottom surface of the guide groove is provided on a pressing surface of the regulating member. 4.

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