JPH07289357A - Elevation supporting device for elevating base - Google Patents

Abstract

PURPOSE:To facilitate the fitting work, and to relatively move leg bodies by rolling ball bodies, which are respectively supported by both side plates of a slide member, so that they abut on the inner wall surface of an outer leg body and the outer wall surface of an inner leg body. CONSTITUTION:A slide member 9 having a pair of side plates 28 is arranged between the sidewall part 12 of an outer leg body 6 and the sidewall part 16 of an inner leg body, and a thrust bearing 29 is fitted to each side plate 28, and the circumferential surface of a ball body 31, which is supported by the thrust bearings 29 freely to be rotated, is projected toward both the inner and outer surfaces of the side plates 28. With this structure, the circumferential surface of the ball body 31 can securely abut on the sidewall part 12 of the outer leg body and the sidewall part 16 of the inner leg body, and the deviated abutment of a rolling body such as a roller can be prevented. Consequently, the outer leg body 6 can be smoothly elevated for displacement, and since the ball body 31 can be arranged on the circumference by fitting the thrust bearing 29 made of the ready-made product to the slide member 9, the fitting work is facilitated, and the cost can be restricted low. A load between the slide member 9 and the leg body is distributed to plural positions for the effective support.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an elevating / lowering support device for an elevating / lowering table which supports an elevating / lowering table composed of a top plate or a wash basin of an elevating table so as to be vertically movable.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 1-244263, a retainer is provided between an outer leg having a square cross section and an inner leg loosely fitted to the outer leg. There is known a lift support device for a lift, which is arranged and rotatably supports a roller on the retainer.
In this elevator support device for the elevator, the central axis of rotation of the roller is set horizontally with respect to the retainer and at right angles to the moving direction of the retainer, and the roller is installed in a hole formed through the retainer. The roller is rotatably supported in a state where the surface of the roller is projected to the front and back surfaces of the retainer, so that the outer leg and the inner leg are smoothly moved relative to each other.

[0003]

When a retainer for a guide roller, which rotatably supports a roller as described above, is used, the moving direction of the retainer and the rotating direction of the roller are slightly deviated from each other. In this case, the peripheral surface of the roller comes into one-side contact with the wall surfaces of both legs, and the outer leg and the inner leg cannot be smoothly moved relative to each other. For this reason, there has been a drawback that the rotation center axis of the roller must be accurately centered and attached to the retainer, and the attachment work is complicated.

The present invention has been made in order to solve the above problems, and does not require complicated mounting work.
An object of the present invention is to provide an elevating / lowering support device for an elevating table, which can smoothly move the outer leg and the inner leg relatively to each other.

[0005]

The invention according to claim 1 is
In a lifting support device for an elevator having an external leg and an internal leg that are connected so that they can move relative to each other, a slide member having a pair of side plates is disposed between the external leg and the internal leg. The ball member is rotatably supported on both side plates of the slide member, and the peripheral surface of the ball member is projected on both inner and outer surfaces of the side plate.

According to a second aspect of the present invention, a plurality of ball body supporting portions are provided in the width direction of the side plate of the slide member, and the ball bodies are rotatably supported by the ball body supporting portions.

According to the third aspect of the invention, a plurality of balls are arranged on the circumference of the retainer, and the balls rotate while the peripheral surfaces of the balls project outward from both plate surfaces of the retainer. A thrust bearing, which is freely supported, is attached to a side plate of a slide member.

According to a fourth aspect of the present invention, the outer leg body and the inner leg body are provided with side wall portions having a pair of inclined plates protruding outward, and slide members are arranged between the both side wall portions. is there.

[0009]

According to the invention described in claim 1, when the outer leg and the inner leg are moved relative to each other, the balls supported by the both side plates of the slide member are provided on the inner wall surface of the outer leg and the outer side of the inner leg. By rolling while abutting on the wall surface, the relative movement is smoothly performed.

According to the second aspect of the present invention, when the outer leg and the inner leg are moved relative to each other, the balls supported by the both side plates of the slide member have the inner wall surface of the outer leg and the outer side of the inner leg. It will roll while abutting on multiple points on the wall surface.

According to the third aspect of the present invention, when the outer leg and the inner leg are moved relative to each other, the ball body of the thrust bearing supported by both side plates of the slide member has the inner wall surface of the outer leg and the inner leg. It rolls while contacting with a plurality of places on the outer wall surface of the body.

According to the fourth aspect of the present invention, when the outer leg and the inner leg are moved relative to each other, the ball body supported by the both side plates of the slide member and the inner wall surface of the both side wall portions of the outer leg body, By rolling while abutting on the outer wall surfaces of both side plates of the inner leg, the relative movement is smoothly performed.

[0013]

1 to 4 show a work table equipped with an elevating / lowering support device for an elevating table according to an embodiment of the present invention. This work table includes a top plate 1 and side reinforcement members 2 made of square pipe material attached to the lower surfaces of the left and right sides of the top plate 1.
And an elevating table 4 having a connecting member 3 made of a pair of square pipes installed between the both side reinforcements 2, and an elevating supporting device 5 for supporting the elevating table 4 so as to be vertically movable. .

The lifting / lowering support device 5 includes an external leg 6 attached to the lower surface of the lifting table 4, an internal leg 7 for supporting the external leg 6 so that the external leg 6 can be raised and lowered, and a lower end portion of the internal leg 7. And a slide member 9 disposed between the outer leg body 6 and the inner leg body 7, and a lift drive mechanism 10 for driving the lift base 4 up and down. .

The outer leg 6 is provided with a pair of side walls 12 having a pair of inclined plates 11 projecting in a mountain shape at both left and right ends.
And a connecting plate 13 installed between the intermediate portions and the lower end portions of the side wall portion 12 in the vertical direction, and an upper surface plate 14 installed on the upper end portion of the side wall portion 12. It is fixed to the lower surface of the connecting member 3.

The inner leg body 7 is composed of a pair of inclined walls 1.
5 has a side wall portion 16 provided with 5, a connecting plate 17 installed between the lower end portions of the side wall portion 16 and an upper surface plate 18 attached to the upper end portion of the side wall portion 16. A hole 19 for installing the lifting drive mechanism 10 is formed. The side wall portion 16 of the inner leg body 7 has an outer shape and an installation interval so that a gap corresponding to the thickness of a thrust bearing 29 described later is formed between the side wall portion 16 of the outer leg body 6 and the inner surface of the side wall portion 12 of the outer leg body 6. Etc. are set.

The base 8 has a base plate 20 to which the lower ends of the inner legs 7 are fixed, and the base plate 20.
Has side members 21 made of square pipe material installed at the left and right ends of the base plate, and adjusters 22 projecting from both ends of the lower surface thereof. A bracket 23 to be attached is projected.

The lifting drive mechanism 10 includes a drive motor 24.
It is composed of a ball-screw type electric mechanism driven by, and its detailed structure is well known, so a detailed description thereof will be omitted, but a gear case 25 provided with a drive gear that is rotationally driven by the drive motor 24, An outer cylinder 26 rotatably supported by the gear case 25, and a slide bar 2 slidably supported by the outer cylinder 26.
7, and a ball screw is formed between the slide bar 27 and the outer cylinder 26.

The lower end of the gear case 25 is bolted to the bracket 23 of the base 8 by a connecting bolt, and the upper end of the slide bar 27 is bolted to the connecting member 3 of the lift 4. The outer cylinder 26 is rotationally driven by the drive motor 24, so that the slide bar 27 is screwed and the elevating table 4 and the external leg 6 are vertically moved.

The slide member 9 is made of L-shaped steel having a pair of side plates 28 arranged between the side wall portion 12 of the outer leg body 6 and the side wall portion 16 of the inner leg body 7. As shown in FIG. 5, attachment holes 30 are formed in the upper and lower ends, respectively, into which thrust bearings 29 are attached by press fitting.

As shown in FIG. 6, the thrust bearing 29 has a retainer 32 in which a plurality of ball bodies 31 are arranged at predetermined intervals on the circumference, and the peripheral surface of the ball body 31 is a retainer 32. Is rotatably supported in a state of protruding outward from both plate surfaces, and the thrust bearing 29 is mounted in the mounting hole 30 of the slide member 9, so that the inner and outer surfaces of the side plate 28 are surrounded by the peripheral surface of the ball body 31. Is configured to be installed in a protruding state. Also,
On the inner surface of the lower end portion of the outer leg body 6, a locking portion 33 for preventing the slide member 9 from coming off is attached by means such as bolting.

In the above structure, the outer leg 6 and the inner leg 7
The slide member 9 to which the thrust bearing 29 is attached is disposed between the outer leg body 6 and the inner leg body 7, and the lower end portion of the lift drive mechanism 10 is mounted on the base. 8 is mounted on the bracket 23 and the upper end of the lifting drive mechanism 10 is mounted on the lower surface of the lifting table 4 to assemble the work table.

In the work table assembled in this manner, the slide bar 27 and the external leg 6 are displaced up and down by operating the drive motor 25 of the elevator drive mechanism 10 to raise and lower the mount table 4. The height can be adjusted. When the outer leg 6 is displaced up and down,
Thrust bearing 2 attached to slide member 9
By rolling the ball body 31 of 9 along the inner wall surface of the outer leg body 6 and the outer wall surface of the inner leg body 7, the outer leg body 6 is smoothly slid and displaced while being supported by the inner leg body 7. Become.

As described above, the side wall portion 12 of the outer leg body 6,
A slide member 9 having a pair of side plates 28 is disposed between the inner leg 7 and the side wall portion 16, and a thrust bearing 29 is attached to each side plate 28 of the slide member 9 and rotatably supported by the thrust bearing 29. Ball body 3
Since the peripheral surface of No. 1 is configured to project to both the inner and outer surfaces of the side plate 28, the peripheral surface of the ball body 31 is reliably brought into contact with the side wall portion 12 of the outer leg body and the side wall portion 16 of the inner leg body 7, respectively. Therefore, it is possible to reliably prevent the situation where the rolling element is in a one-sided contact state as in the case of using the rolling element made of rollers.

Therefore, when the lifting table 4 is lifted and lowered by the lifting drive mechanism 10, the ball 31 provided on the thrust bearing 29 rolls along the inner wall surface of the outer leg body 6 and the outer wall surface of the inner leg body 7. While making the external leg 6
Can be smoothly displaced up and down. Moreover, by mounting the thrust bearing 29, which is a ready-made product, on the slide member 9, the ball body 31 can be arranged on the circumference, so that the assembling work is facilitated and the manufacturing cost of the lifting support device is reduced. The cost can be suppressed at low cost, and the load acting between the slide member 9 and the outer leg body 6 and the inner leg body 7 can be dispersed at a plurality of places to be effectively supported.

Further, as described above, the outer leg body 6 and the inner leg body 7 each have a pair of inclined plates 11 protruding outward.
Side wall portions 12 and 16 provided with 15 are provided, and both side wall portions 1
The slide member 9 is arranged between 2 and 16, and the side plate 2 thereof is provided.
When the peripheral surface of the ball body 31 supported by 8 is brought into contact with the wall surfaces of the outer leg body 6 and the inner leg body 7, the slide member 9 moves the leg body in the left-right direction and the front-back direction. Since the acting loads can be respectively supported, it is possible to effectively support the above loads with a simple configuration and smoothly move the lifting platform 4 up and down.

Note that, as shown in FIGS. 7 and 8, two rows of ball support portions each having a spherical hole 34 are provided in the width direction of each side plate of the slide member made of a pair of L-shaped steels 35 and 36. Both L-shaped steels 35 and 36 are formed at four upper and lower positions, and the ball body 31 is arranged on the ball body supporting portion.
Are integrally joined by means such as welding or adhesion so that the ball member 31 is rotatably supported by the slide member, and the peripheral surface of the ball member 31 is projected on both front and back surfaces of the side plate. Good.

When a plurality of ball support parts are provided on each side plate of the slide member made of the L-shaped steels 35 and 36 as described above, and the ball support parts are rotatably supported by the ball support parts, respectively. In addition, since the load acting on the wall surfaces of the outer leg body 6 and the inner leg body 7 can be distributed to a plurality of places during the raising / lowering operation of the elevating table 4, it is possible that the wall surface of the leg body is partially deformed. It is possible to effectively stabilize the elevating state of the external leg body 6 while preventing it.

The shapes of the outer leg body 6 and the inner leg body 7 are not limited to those in the above-mentioned embodiment, and various modifications are possible. The outer leg body and the inner leg having a square or rectangular cross section. A body may be provided, and a pair of slide members 9 may be arranged between the opposite corner portions. Further, the upper and lower positions of the outer leg body 6 and the inner leg body 7 are reversed so that the upper end portion of the inner leg body 7 is fixed to the lower surface of the lift 4, and the lower end portion of the outer leg body 6 is fixed to the base 8. It may be configured to be fixed to the upper surface. Further, instead of the above ball screw type up-and-down drive mechanism, the up-and-down table 4 may be biased upward by a biasing means composed of a gas spring, or the up-and-down table 4 may be displaced up and down manually. .

Further, the lifting / lowering support device for the lifting / lowering table according to the present invention is not limited to the work table having the lifting / lowering table 4, but may be a washbasin, a supermarket cash register table, a support table for nursing care, etc., depending on the usage state and users. The present invention can be applied as various supporting devices that can be lifted and lowered according to the height and the like.

[0031]

As described above, according to the present invention, the slide member having the pair of side plates is disposed between the outer leg body and the inner leg body, and is rotatably supported by each side plate of the slide member. Since the peripheral surface of the ball body is configured to project to both inner and outer surfaces of the side plate, the peripheral surface of the ball body can be reliably brought into contact with the side wall portion of the outer leg and the side wall portion of the inner leg, respectively. Therefore, it is possible to reliably prevent the situation where the rolling element is in a one-sided contact state as in the case of using the rolling element made of rollers. Therefore, when the outer leg and the inner leg are relatively moved, the outer leg and the inner leg are rolled while rolling the peripheral surface of the ball along the inner wall surface of the outer leg and the outer wall surface of the inner leg. There is an advantage that the relative movement of the body can be performed smoothly.

According to the second aspect of the present invention, since a plurality of ball support portions are provided on each side plate of the slide member, and the ball bodies are rotatably supported by the ball support portions, the elevating table is lifted and lowered. The load acting on the wall surfaces of the outer leg and the inner leg at the time of operation can be dispersed to a plurality of places. Therefore, it is possible to effectively prevent rattling between the outer leg and the inner leg while preventing the situation where the load is concentrated on one part of the wall of the leg and the wall is partially deformed. There is an advantage that it can be prevented.

Further, according to the third aspect of the present invention, since the thrust bearing having the plurality of ball bodies arranged on the circumference of the retainer is attached to the slide member, the plurality of ball bodies are attached to the slide member. It can be easily attached, the manufacturing cost of the lifting support device can be kept low, and the load acting between the slide member and the outer leg and the inner leg can be dispersed at a plurality of positions to be effective. Can be supported by.

Further, in the invention according to claim 4, as described above, the outer leg and the inner leg are provided with the side wall portions provided with the pair of inclined plates projecting outward, respectively, and between the both side wall portions. Since the slide member is arranged and the peripheral surface of the ball body supported by the side plate is made to abut against the wall surfaces of the outer leg body and the inner leg body, the slide member allows the left and right direction of the leg body and the front-back direction The loads acting in the respective directions can be supported, and the loads can be effectively supported with a simple configuration, and the outer leg and the inner leg can be smoothly moved relative to each other.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a lift support device for a lift according to the present invention.

FIG. 2 is a plan view of the lifting / lowering support device.

FIG. 3 is a side view of the lift support device.

FIG. 4 is an exploded perspective view of the lifting support device.

FIG. 5 is an explanatory diagram showing a configuration of a mounting portion of a thrust bearing.

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

FIG. 7 is an exploded perspective view showing another example of the slide member.

FIG. 8 is a plan sectional view of the thrust member.

[Explanation of Codes] 6 External Leg 7 Internal Leg 9 Slide Member 11,15 Inclined Plate 12,16 Side Wall 28 Side Plate 29 Thrust Bearing 31 Ball

Claims (4)

[Claims] 1. A lifting / lowering support device for an elevator having an external leg and an internal leg that are movably connected to each other, wherein a slide member having a pair of side plates is provided between the external leg and the internal leg. An elevating / lowering support device for an elevating table, characterized in that the ball bodies are rotatably supported on both side plates of the slide member, and the peripheral surfaces of the ball bodies are projected on both inner and outer surfaces of the side plates. 2. The elevating device according to claim 1, wherein a plurality of ball support parts are provided in the width direction of the side plate of the slide member, and the ball support parts are rotatably supported by the ball support parts. Lifting and supporting device for the table. 3. A plurality of ball bodies are arranged on the circumference of the retainer, and are rotatably supported with their peripheral surfaces projecting outward from both plate surfaces of the retainer. The lifting support device for a lift according to claim 1, wherein the thrust bearing is attached to a side plate of the slide member. 4. The outer leg body and the inner leg body are provided with side wall portions having a pair of inclined plates projecting outward, and a slide member is arranged between the both side wall portions.
4. An elevating / lowering support device for an elevating table according to any one of 3 to 3.