JPH02215408A - Placing base - Google Patents

Abstract

PURPOSE:To make a lifting operation much simpler in comparison with the time of using a gear mechanism or screw mechanism, etc., by incorporating a gas spring having a lock mechanism into a strut as a lifting mechanism. CONSTITUTION:A front column A1 and a rear column A2 are composed stepless- expandably by fitting gas springs S1 and S2 having lock mechanism as the lifting mechanism to fixing pipes 1 and 2 made of round pipe materials, respectively, a front top board U1 to place a keyboard B is fitted at the upper edge of the front side gas spring S1 and a rear top board Y2 to place a display device C such as a CRT is fitted on the rear side gas spring S2, respectively. Between the lower parts of the front pipe 1 and rear pipe 2, a connection pipe 3 is fitted by welding, etc., both columns A1 and A2 are integrally connected in a parallel condition at intervals in the front and rear, and a strut A is composed. A pair of right and left front leg bodies 4 and 4 is fitted in the lower part of the front pipe 1 to the front column A1, a pair of right and left rear leg bodies 5 and 5 are fitted in the lower part of the rear pipe 2 to the rear column A2, respectively, and by respective leg bodies 4, 4, 5 and 5, the strut A is made to stand on a floor by itself.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mounting table used as an OA table or the like on which OA equipment such as a word processor or a personal computer is mounted.

(Prior Art) Conventionally, it is known that a mounting table such as an OA table is provided with an elevating mechanism on the column that supports the top plate, but this elevating mechanism may be a float mechanism using a rack and a pinion, or a float mechanism using a screw shaft and a nut. Because it uses a screw mechanism, it takes time and effort to move up and down, such as by rotating the handle.

Therefore, the present invention uses a gas spring with a locking mechanism as the lifting mechanism, thereby making it possible to easily perform lifting and lowering operations, and to suppress rotation of the top plate, which is a problem when using gas springs. It provides a mounting table.

Means for Solving Problem C1] The mounting table of the present invention includes a support that is extendable and retractable by attaching a gas spring with a locking mechanism to a fixed tube with the cylinder on the movable side, and the gas spring in this support. A top plate attached to the upper end of the cylinder, a first rotation prevention mechanism that prevents the cylinder of the gas spring from rotating relative to the fixed pipe, and a second rotation prevention mechanism that prevents the top plate from rotating relative to the gas spring. The first detent mechanism includes a concave member having a vertical guide groove on one of the outer surface of the cylinder of the gas spring and the inner surface of the fixed tube, and a concave member provided with a vertical guide groove on the other side through the entire expansion and contraction stroke of the gas spring. The second anti-rotation mechanism is configured by providing engaging convex members, respectively, and the second detent mechanism includes a tapered shaft that tapers upward at the upper end of the cylinder, a tapered pipe that tightly fits the tapered shaft on the lower surface of the top plate, and A roll pin is provided in the upper part of the tapered tube passing through the tapered tube in the radial direction, while the upper end surface of the tapered shaft has a curved surface that substantially corresponds to the outer surface of the roll pin, so that the tapered shaft and the tapered tube are tightly sealed. O when fitted
- It is constructed by providing an engaging groove into which the pin fits.

In this case, in the mounting table according to claim 2, the operating lever of the valve that controls pressurization and pressure release of the gas spring is located close to the bottom surface of the top plate, and the lever end is located near the outer periphery of the top plate. It is attached to a gas spring cylinder.

In the case of the mounting table according to claim 3, as a specific means for attaching the gas spring to the fixed tube, a rod receiving member is attached to the rod end of the gas spring, and this rod receiving member is attached to the lower part of the inner surface of the fixed tube on the outer surface of the fixed tube. It is fixed from the side with screws.

In the mounting table according to the fourth aspect of the present invention, a cylindrical cylinder guide member is attached to the upper end of the fixed tube, through which the cylinder of the gas spring passes through the fixed tube on the center line.

On the other hand, in the mounting table according to a fifth aspect of the present invention, an air vent is provided in the fixed tube in conjunction with the adoption of the gas spring.

In addition, in the mounting table according to claim ¥46, as a specific structural example of the first rotation prevention mechanism, the concave member is attached to the lower end of the cylinder of the gas spring, the convex member is attached to the inner surface of the fixed tube, and the concave member is moved. It is installed over a wide range.

[Effect]

In this way, in one unit of the present invention, a gas spring with a locking mechanism is incorporated into the column as a lifting mechanism, so the lifting operation is easier than when a conventional gear mechanism or screw mechanism is used. It becomes much easier.

In this case, if a gas spring is used as the lifting mechanism,
The following problems unique to gas springs arise.

(2) Since the cylinder, which is a movable column, and the rond, which is a fixed column, are relatively rotatable, the cylinder rotates with respect to the fixed tube.

(2) In a gas spring, nitrogen gas and oil are sealed inside and a sealing member that is weak against heat is provided, so welding cannot be used as a means for connecting the cylinder and the top plate. Therefore, since it is not possible to directly weld the top plate holder and the top end of the cylinder, the possible means is to fit and connect the thick shaft part at the top end of the cylinder and the pipe body on the top plate holder side. This causes the top plate to rotate.

Therefore, as it stands, it has low practical value as a mounting table.

In the present invention, in order to prevent rotation at these two places,
Since both the first and second anti-rotation mechanisms are provided, rotation of the top plate can be suppressed and the practical value of the mounting table can be increased.

In this case, the first anti-rotation mechanism exhibits the anti-rotation function throughout the entire expansion and contraction stroke of the gas spring, so that the desired objective can be achieved at any height of the top plate.

On the other hand, the second anti-rotation mechanism exhibits both the anti-rotation function by the taper fitting and the anti-rotation function by the engagement portion of the roll pin and the engagement groove, so the anti-rotation is highly reliable.

Further, according to the structure of claim 2, the operation lever of the gas spring is located at the upper part (high position) of the support, and the lever end is located near the bottom surface of the top plate and near the outer periphery of the top plate. The lever operation itself becomes easier, and when the top plate is pushed down, the pressure can be released by grasping the end of the lever at the same time, so even a second person can easily lower the top plate.

Furthermore, according to the structure of claim 3, the gas spring is inserted into the fixed pipe with the O-rad receiving member attached to the rod end of the gas spring, and the rond receiving member is screwed to the fixed pipe from the outside. Gas springs can be easily attached to fixed pipes.

On the other hand, with the structure of claim 4, since the cylinder of the gas spring can be held vertically on the center line within the fixed tube, an unreasonable load is not applied to the cylinder, and the recess of the first detent mechanism It is possible to ensure that the member and the convex member are held together.

Further, according to the structure of claim 5, since the air inside the fixed tube can be released to the outside when lowering the top plate, the contraction (lowering) resistance of the gas spring is reduced, and the operation of lowering the top plate is made easier.

Furthermore, with the configuration of claim 6, the entire first detent mechanism is located within the fixed tube and is hidden from the outside, so there is no risk of damage to the mechanism due to external force, and the appearance is beautiful.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

In this embodiment, a mounting table used as an OA table is taken as an example of application.

A is a column, A1 is a front column that constitutes this column, and A2 is a rear column.

The front column A1 and the rear column A2 can be expanded and retracted steplessly by attaching gas springs 81 and 82 with locking mechanisms as lifting mechanisms to fixed tubes (hereinafter referred to as front tube and rear tube) 1.2 made of round vibrator material, respectively. (Height adjustment) The front top plate U1, on which the keyboard B is placed, is placed on the top end of the front gas spring S1, and the rear top plate U1, on which the display device C such as a CRT is placed, is placed on the top end of the rear gas spring S2. A plate U2 is attached to each.

A connecting tube 3 made of round vibe material is attached between the lower parts of the front tube 1 and the rear tube 2 by welding, etc., and this connecting tube 3 connects both columns A.
1. A pillar A is constructed by integrally connecting the pillars A2 in a parallel manner with a space between them in the front and rear.

In addition, the front column A1 has a pair of left and right front legs 4, 4 extending to the front right and left sides at the bottom of the front tube 1, and the rear column A2 has a pair of left and right front legs 4, 4 extending to the rear right and left sides at the bottom of the rear tube 2. rear leg 5
．． These legs 4, 4, 5, and 5 allow the column A to stand on its own on the floor.

6 are casters for moving the table provided at the end of each of these legs 4.5.

Next, the elevating structure of the front column A1 and the rear column A2 will be described in detail with reference to FIG. 4 and other figures.

The gas springs 51S2 of the front column A1 and the rear column A2 are
The rod 7 is inserted into the front tube 1 and the rear tube 2 with the rod 7 on the lower side (fixed side) and the cylinder 8 on the upper side (movable side), respectively, and the lower end of the rod 7 is inserted into the front tube 1 and the rear tube 2. It is fixed to the lower part via the rod receiving member 9. Therefore, when the gas springs 81, 82 are activated, the cylinder 8 moves up and down, and the front column A1 and the rear column A2 expand and contract.

The rod receiving member 9 is attached to the rod 7 by a stepped portion 7a at the lower end of the rod and a stop pin 10, and is attached to the front tube 1. When inserted into the rear tube 2, it is fixed with a screw 11 from the outer surface of the tube. A cushion member 12 is fitted onto the rod 7 on the upper surface of the rod receiving member 9.

In addition, according to this embodiment structure in which the front tube 1 and the rear tube 2 are connected by the connecting tube 3 to form the support column A, the front tube and the rear tube are connected by bending a round pipe material into a U shape. Compared to the case where they are connected integrally through an arc-shaped part, the length of both straight pipe parts is longer with the same strut length, so the length of the gas spring 51S2 is lengthened accordingly to expand and contract. The stroke (height adjustment range) can be increased. Or, conversely,
If the length of the gas spring is the same, the length of the strut can be shortened.

The front top plate U1 and the rear top plate U2 are respectively attached to the upper ends of the cylinders of the gas springs 81 and 82, and can be set to arbitrary height positions by adjusting the expansion and contraction of the gas springs S1 and 82, respectively.

Pressurizing (extending) gas springs 81 and 82, releasing pressure (
A valve (not shown) for controlling the reduction (reduction) is provided at the top of the cylinder. The operating lever 13.13 for operating this valve is located close to the lower surface of the top plate U1U2, and the lever end is located close to the bottom surface of the top plate U1U2. The gas springs S1 and 82 are installed horizontally from the upper part of the cylinder along the lower surface of the top plate so as to be located near the widthwise end of U2.

In this way, when holding the widthwise ends of the top plates Ut and U2 and pushing them down in order to lower the heights, simultaneously grasp the operation lever 13 and perform the pull-up operation (pressure release operation).
can do. Therefore, even a third person can easily lower the top plate.

Since this mounting table uses gas springs S1 and 82 with locking mechanisms as the lifting mechanism, compared to conventional gear-type or screw-type lifting mechanisms, lifting can be done only by pressing down on the operating lever 13. When descending, pull up the operating lever 13 to release the pressure and then release the top plate L.
h, by pressing down U2, you can easily lower the top plate Lh.

Stepless height adjustment of U2 can be performed.

Note that the lower ends of the front tube 1 and the rear tube 2 are opened to the outside as air vents, and the gas springs S1 and 8
When the tube 2 is contracted (when the top plate is lowered), the air inside both tubes 1.2 is released to the outside from the lower end openings 1a and 2a. As a result, gas spring S1. Since the reduction resistance of S2 is small, the operation of lowering the -layer top plate becomes easier.

However, with only the above configuration, the gas spring S1.82
Since the cylinder 8.8 of the cylinder 8.8 rotates with respect to the front tube 1 and the rear tube 2, and the top plates U1 and U2 rotate and hang with respect to the cylinder 8.8, the top plate U1. There is a risk that U2 may rotate.

Therefore, the following anti-rotation mechanism is provided.

(I) Detent mechanism for the cylinder 8 relative to the front tube 1 and rear tube 2 (first detent mechanism, see Figure 4.5) The front tube 1 and the rear tube 2 each have a vertically protruding member 2 on their inner surfaces. A band-shaped guide plate 14 is fixedly attached thereto. This guide plate 14 is constructed by inserting fixing pins 14a protruding from the top and bottom of the plate 14 into holes 15 provided in the peripheral walls of the front tube 1 and rear tube 2 from the inside of the tubes and fixing them by welding. It is fixed at 1.2.

On the other hand, a cylindrical guide tube 16 as a concave member is fixed to the lower end of the cylinder 8 of the gas springs 81 and 82. This guide tube 16 is provided with a guide groove (concave groove) 16a in the vertical direction on its outer circumferential surface, and the guide plate 14 is engaged with this guide groove 16a so as to be relatively slidable up and down. Thereby, the cylinder 8.8 is configured to be prevented from rotating relative to the front tube 1 and the rear tube 2 as much as possible throughout the entire expansion and contraction stroke of the gas springs S1 and S82.

Note that a cylindrical cylinder guide member 17 is fitted and fixed to the upper end portions of the front tube 1 and the rear tube 2, respectively, through which the cylinder 8 penetrates on the center line of the tubes. This cylinder guide member 1
7 to hold the cylinder 8 in a vertical state and prevent excessive bending loads from acting on the cylinder 8, and at the same time,
The engaged state between the guide plate 14 and the guide tube 16 is reliably maintained.

(I[) Top plate Llt, L1 for cylinder 8.8
2 (Second rotation prevention mechanism, see Fig. 4.6-7) A tapered shaft 18 having a Morse taper with an upwardly tapered outer peripheral surface is integrally provided at the upper end of the cylinder 8. Board L
h. The top plate bone fixed to the lower surface of LJ2 fixes to the center of the lower surface of the metal fitting 19 a tapered pipe 20 whose inner circumferential surface is a Morse bar, into which the tapered shaft 18 is tightly fitted, and by these, the cylinder 8°8 The basic anti-rotation function of the top plate Lh and U2 is obtained.

However, with only this connection structure using tapered fitting, the top plate U1. If a large rotational moment is applied to the LI2 side, it cannot be adequately resisted.

Therefore, a roll pin (so-called C-bin) 21 is attached to the upper end of the tapered tube 20 so as to pass through the center of the tube in the radial direction, while a roll pin (so-called C-bin) 21 is attached to the upper end of the tapered shaft 18.
An engagement groove 22 in which the roll pin 21 engages with the tapered tube 20 tightly fitted is provided in the radial direction passing through the coaxial center.

The engagement groove 22 has a curved surface corresponding to the outer surface of the roll pin 21, and is formed to have a depth larger than the radius of the bin 21 so that the roll pin 21 will not come off due to the rotational force of the top plate.

Due to the engagement between the roll pin 21 and the bottle engaging groove 22, even when a large rotational moment is applied to the top plate side,
Rotation of the tapered tube 20 (top plates Lh, L12) with respect to the tapered shaft 18 (cylinder 8) can be effectively prevented.

Further, after the roll pin 21 is attached to the negative opening, it is reliably held at the attachment position by its spring force (it will not come off even if an external force is applied), so that the original rotation prevention function is highly reliable.

Furthermore, during assembly, the tapered shaft 18 is connected to the tapered pipe 20.
Even if there is some initial deviation in the planar positional relationship between the roll pin 21 and the engagement groove 22, the roll pin 21
Since the curved surface acts as a guide to guide the bottle 21 to the engagement groove 22, assembly is facilitated.

In this way, the top plate U1. (The rotation of J2 can be suppressed to a minimum of only a slight play. Therefore, during use, the top plate U1.U2 may rotate due to external force and become unusable, or this top plate tJ
1. The rotation of L12 can prevent collisions between top plates, between devices, or between one top plate and devices placed on the other.

By the way, in the above embodiment, as the first detent mechanism,
A guide tube 16 with a guide groove 16a as a concave member at the lower end of the cylinder 8 of the gas spring 81, 82, and a fixed tube 1
．． Although a vertically long guide plate 14 as a convex member is provided on the inner surface of the cylinder 8, a vertically long concave member may be provided on the cylinder 8 side, and a partial member may be provided on the fixed tube convex side.

Alternatively, a convex member may be provided on the cylinder side and a concave member may be provided on the fixed tube 1.2 side.

In addition, in the above embodiment, the case where the front column A1 and the rear column A2 are connected to constitute the column A is taken as an example, but it goes without saying that the above-mentioned procedure can be carried out in the case of the main column as well. do not have.

(Effects of the Invention) As described above, according to the present invention, a gas spring with a locking mechanism is incorporated into the column as an elevating mechanism, so compared to the case where a conventional wheel mechanism or screw mechanism is used. Elevating and lowering operations are much easier.

In addition, in the present invention, the rotation of the cylinder of the gas spring with respect to the fixed tube, which is a problem when using the gas spring as an elevating mechanism, and the rotation of the top plate with respect to the cylinder are prevented by both the first and second anti-rotation mechanisms. This can increase the practical value of the mounting table.

In this case, the first anti-rotation mechanism exhibits the anti-rotation function throughout the entire expansion and contraction stroke of the gas spring, so that the desired objective can be achieved at any height of the top plate.

On the other hand, the second anti-rotation mechanism exhibits both the anti-rotation function by the Taper fitting and the anti-rotation function by the engaging portion of the roll pin and the engagement groove, so the anti-rotation is highly reliable.

Further, according to the structure of claim 2, the operating lever of the gas spring is located at the upper part (high position) of the support, and the lever end is located near the lower surface of the thick root and near the outer periphery of the top plate. The lever operation itself becomes easier, and when the top plate is pushed down, the pressure can be released by grasping the end of the lever at the same time, so even a second person can easily lower the top plate.

Furthermore, according to the structure of claim 3, the gas spring can be easily inserted into the fixed pipe with the rod receiving member attached to the rod end of the gas spring, and the rod receiving member can be screwed onto the fixed pipe from the outside. The spring can be easily attached to a fixed tube.

On the other hand, with the structure of claim 4, since the cylinder of the gas spring can be held vertically on the center line within the fixed tube, an unreasonable load is not applied to the cylinder, and the recess of the first detent mechanism An engaged state between the member and the convex member can be ensured.

Further, according to the structure of claim 5, since the air inside the fixed tube can be released to the outside when lowering the top plate, the contraction (lowering) resistance of the gas spring is reduced, and the operation of lowering the top plate is made easier.

Furthermore, with the structure of claim 6, the entire first detent mechanism is located within the fixed tube and is hidden from the outside, so there is no risk of damage to the mechanism due to external force, and the appearance is beautiful.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing an embodiment of the present invention; It is. A1. A2...Front column and rear column of the strut, 1, 2...
Fixed pipes, 1a, 2a...Lower end opening of fixed pipe as air handling port, Sl, S2...Gas spring, 7...
・Rondo of the same gas spring, 8... Same cylinder, 9
...Rod receiving member, 11...Screw for mounting the same member, 13...Gas spring operating lever 14...
Guide plate as a convex member of the first detent mechanism, 1
6... Guide tube as the concave member, 16a... Concave groove of the guide tube, 17... Cylinder guide member, 18.
...Taber shaft of the second detent mechanism, 20...The same Taber tube, 21...The same roll pin, 22...The same engaging groove. Patent applicant: Representative of KOKUYO Co., Ltd. Patent attorney: Etsushi Kotani
Patent Attorney Chief 1) Masamukai Patent Attorney Takao Ito

Claims (1)

[Scope of Claims] 1. A support that is extendable and retractable by attaching a gas spring with a locking mechanism to a fixed pipe with the cylinder on the movable side, and a top plate that is attached to the upper end of the cylinder of the gas spring in this support. and a first rotation prevention mechanism that prevents the cylinder of the gas spring from rotating relative to the fixed tube, and a second rotation prevention mechanism that prevents the top plate from rotating relative to the gas spring, and the first rotation prevention mechanism A concave member with a vertical guide groove is provided on either the outer surface of the cylinder of the gas spring or the inner surface of the fixed tube, and a convex member that engages with the guide groove through the entire expansion and contraction stroke of the gas spring is provided on the other side. The second anti-rotation mechanism includes a tapered shaft that tapers upward at the upper end of the cylinder, and a tapered pipe that tightly fits the tapered shaft on the lower surface of the top plate.
Further, a roll pin is provided in the upper part of the tapered pipe passing through the tapered pipe in the radial direction, and on the upper end surface of the tapered shaft,
A mounting table comprising an engagement groove having a curved surface corresponding to the outer surface of the roll pin and into which the roll pin is fitted while the tapered shaft and the tapered pipe are tightly fitted. 2. Make sure that the operating lever of the valve that controls the pressurization and release of the gas spring is installed in the cylinder of the gas spring in close proximity to the bottom surface of the top plate, and with the lever end located near the outer periphery of the top plate. The mounting table according to claim 1, characterized in that: 3. The gas spring is attached to the fixed tube by attaching a rod receiving member to the rod end of the gas spring, and fixing this rod receiving member to the lower inner surface of the fixed tube from the outer surface of the fixed tube with a screw. The mounting table according to claim 1 or 2. 4. The mounting table according to any one of claims 1 to 3, wherein a cylindrical cylinder guide member is attached to the upper end of the fixed tube, through which the cylinder of the gas spring passes through on the center line of the fixed tube. 5. The mounting table according to any one of claims 1 to 4, wherein the fixed tube has an air vent. 6. The concave member is attached to the lower end of the cylinder of the gas spring, and the convex member is attached to the inner surface of the fixed tube over the range of movement of the concave member. Mounting table.