JPS598587Y2 - Drafting table vertical movement guide device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drafting table vertical movement guide device used in a single-support type drafting table.

Conventionally, when adjusting the height of a drafting table, the present applicant proposed a device for vertically moving the drafting table as shown in FIGS. 1 and 2 (Japanese Patent Application No. 51-103154,
(See Japanese Unexamined Patent Publication No. 53-29856).

This drafting table vertical moving device 1 is assembled with a movable support 4 within a fixed support 3 installed on a base 2 so as to be movable up and down with respect to the fixed support 3.

The movable column 4 is shaped like a hollow rectangular column, and a plurality of guide rollers 5, each with a set of two guide rollers 5, are mounted on each inner wall surface of the opposing fixed column 3, and a guide roller 5 has a bearing structure as a transfer member on each outer surface of the square column. (16 in the illustrated example) are arranged.

These guide rollers 5 are in contact with each inner wall surface of the fixed column 3, and function as rotary support when the movable column 4 moves up and down, thereby absorbing backlash.

An oil cylinder 6 is built in approximately the center of the movable column 4, a base end 6a of this oil cylinder 6 is fixed to the base 2, and a tip 7a of a piston rod 7 protruding from this oil cylinder 6 is attached to a drawing board (not shown). It is fixed to an upper support base plate 8 that directly supports the holder.

The movable column 4 is driven by an oil cylinder 6 to move up and down.

This drafting table vertical movement device 1 is rotatably supported by guide rollers 5 having a bearing structure, so it can move up and down easily and has a considerable effect, but the number of guide rollers 5 increases and its adjustment. This method has the disadvantage that it is difficult to maintain the drawing board holder, and also that the fixed support column is bent and twisted, causing the drawing board holder to swing.

The purpose of the present invention is to provide a drafting table vertical movement guide device that reduces the number of transferable members used, reduces back and forth backlash, simplifies installation adjustment between columns, and reduces deflection of fixed columns. It is.

To achieve this purpose, the present invention is a drafting table whose height is adjusted by a movable column that is built into a fixed column and can move up and down and stop freely relative to the fixed column. The body is protruded approximately on the diagonal line of this movable support, and the contact surface of this transfer body is brought into contact with the vertical rail arranged at the inner corner edge formed by the adjacent inner wall surface of the fixed support. The summary is what we did.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.

In FIG. 3, which shows the entire drafting table 11 incorporating the drafting table vertical movement guide device 10 according to the present invention, a fixed support 13 is installed in the base 12, and this fixed support 13 is configured to be able to move up and down. A movable strut 14 is combined with the movable support 14.

A drawing board holder 15 is disposed at the upper end of the movable support column 14, and side frames 16, 17 formed of square pipes are provided at both sides of the drawing board holder 15.

An angle adjustment plate 18.19 is disposed on this side frame 16.17 so as to protrude downward. Loosen the holder 15 with respect to the movable column 14,
An operating lever 20 for tightening is provided.

As shown by way of example, the vertical movement of the town moving column 14 is performed by a pedal 21 provided protruding from the lower end portion of the fixed column 13 toward the operator.

As shown in FIGS. 4 and 5, a bracket plate 22 is attached to one side 14a of the movable column 14 shaped like a square column.
A similar bracket plate 23 is attached to the other side surface 14b corresponding to the back side of this one side surface 14a.

Both end edges 24, 25.2 of these bracket plates 22, 23
6 and 27 are approximately 4 to the sides 14a and 14b
Adjacent inner wall surfaces 35 of the fixed column 13 at an angle of 5°
Inner corner edges 28, 29 shaped by . 30 and 31
These end edges 24, 25, 26
A total of 8 guide rollers 32 having a bearing structure are provided as rolling bodies at the upper and lower portions of 27 and 27 via support shafts 33.

On the other hand, the inner corner edges 28 , 29 . 30 and 31 are provided with round bar-shaped rails 34 along the vertical direction.

This rail 34 does not necessarily have to be round bar-shaped.

The circumferential surface 36, which is the rolling contact surface of the guide roller 32, always comes into rotational contact with the rail 34 even if the guide roller 32 is slightly misaligned.

Therefore, a high degree of processing accuracy is not required for the guide roller 32, rail 34, movable support 14, fixed support 13, etc.

In the embodiment, the bracket plates 22 and 23 are formed by a single plate, but this is only an example, and a structure in which each guide roller 32 is supported by a separate member may also be used. Alternatively, the structure may be directly supported by the movable support 14.

Further, as the transfer member, a spherical member or a roller or the like may be used instead of a roller having a bearing structure.

If the structure of the drafting table vertical movement device according to the present invention is configured as described above, the number of guide rollers will be halved compared to the conventional one, making it more economical.

Furthermore, it is easy to make adjustments to reduce backlash in the front, rear, left and right directions.

Furthermore, since the direction in which the guide rollers protrude is in the direction of the opposite line of the columns, the influence of pending columns can be reduced.

Furthermore, even if there is some deviation in the mounting position of the guide roller, the guide roller will always come into contact with the rail, so there is no need for high processing accuracy.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a device for vertically moving a drafting table that was previously proposed by the applicant, Fig. 2 is a cross-sectional view showing only one guide roller mounting portion, and Fig. 3 is a diagram showing the device according to the present invention. FIG. 4 is an overall perspective view of a drafting table incorporating a vertical movement guide device, FIG. 4 is a perspective view extracting the vertical movement guide device of the present invention, and FIG. 5 is a plan sectional view thereof. 10... Drafting table vertical movement guide device, 11...
...Drawing table, 13...Fixed support, 14...
...Movable strut, 28, 29, 30.31...
Inner corner edge, 32...Guide roller (transfer body), 3
4...Rail, 36...Ring surface.

Claims (1)

[Scope of utility model registration request] In a drafting table whose height is adjusted by a movable column that is built into a fixed column and is supported to move up and down and stop freely relative to the fixed column, a transfer object is placed on the movable column approximately diagonally to the movable column. A drafting table vertical movement guide device, which is provided protruding from the top and bottom of the drawing table so that the transfer surface of the transfer body comes into contact with a vertical rail provided at an inner corner formed by adjacent inner wall surfaces of a fixed support.