JPH0744177Y2 - Lifting device on the drafting table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an elevating device in a drafting table, and more particularly to an elevating device in which an elevating operation is smoothly performed.

[Prior Art] Conventionally, a structure shown in FIG. 3 is known as a structure for elevating a drawing board frame of a drafting table. In the figure, reference numeral 1 is a pillar standing upright on both left and right sides of the leg, and 2 is a lifting pillar. Sliding pipes 3, 3 are fixed to the front and rear inner wall surfaces of the elevating column 2, and the lower portions of the sliding pipes 3, 3 project below the elevating column 2 and are loosely inserted into the column 1. The protrusions 4, 4 ... Protruding inward are formed on both front and rear surfaces of the elevating column 2 by press working, and a slight clearance is provided between the sliding pipes 3, 3 and the front and rear inner wall surfaces. The purpose is to reduce the friction between the sliding pipes 3 and the inner wall surface of the support column 1 and to raise and lower the support column 2 smoothly.

[Problems to be Solved by the Invention] In the conventional drafting table described above, it is necessary to add a processing step for forming the projecting surfaces 4, 4 ... Also, the protruding surface 4,4 ...
When the value is high, play occurs when moving up and down, and when the value is low, the slidability is deteriorated, so that high processing accuracy is required, which causes a cost increase.

Therefore, there is a technical problem to be solved in order to simplify the machining process and to provide a highly accurate and low cost drafting table by facilitating dimensional control, and the present invention solves the problem. With the goal.

[Means for Solving the Problems] The present invention is proposed to achieve the above-mentioned object, and the lower portion of the elevating column 14 to which the drawing board frame 11 is attached is attached to the leg portion 12.
The column 13 is loosely inserted into the column 13, and the elevating column 14 can be fixed at any height by the fixing means provided on the column 13, and the column 13 and the drawing frame support 15 have the same cross section. It is formed of a cylindrical body, and the lower portions of the pair of sliding tubes 16 and 16 are loosely inserted into the support columns 13, and the upper portions of the sliding tubes 16 and 16 are the inner wall surface of the drawing board frame support body 15. In the drafting table 10 fixed to, the sliding tubes 16 and 16 are inserted in the front and rear of the drawing board frame support 15 through intermediate spacers 18 and outer spacers 19 and 19,
Further, the intermediate spacer 18 is fixed to the drawing board frame supporting plate 15, and the sliding tubes 16, 16 are fixed to the drawing board frame supporting body 15 to provide an elevating device in a drawing table. is there.

[Operation] The upper parts of the pair of sliding tubes 16 and 16 are inserted in the front and rear of the drawing board frame support 15. An intermediate spacer 18 is interposed in the middle of the sliding tubes 16 and 16, and Outer side spacers 19 and 19 are interposed between the outer surfaces of the sliding tubes 16 and 16 and the inner side surface of the drawing board frame support 15. Therefore, if the intermediate spacer 18 is fixed to the drawing frame support 15 using, for example, screws, the intermediate spacer 18 and the outer spacers 19, 19 support the sliding tubes 16, 16 to support the drawing frame. Secure to body 15. At this time, due to the interposition of the outer side spacers 19 and 19, a clearance corresponding to the thickness of the outer side spacers 19 and 19 is generated between the sliding pipes 16 and 16 and the inner side surface of the column 13, and thus the sliding Moving tube 16,16
The sliding contact area between the column 13 and the column 13 becomes small, and the up-and-down column 14 can be smoothly moved up and down.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a drawing table 10, 11 is a drawing board frame, 12 and 12 are leg portions, 13 and 13 are columns standing upright on the leg portions 12 and 12, and 14 and 14 are lifting columns. The lifting columns 14 and 14 are the upper picture frame support members 15 and 15.
And the lower sliding tubes 16, 16, 16, 16 and can be fixed to the columns 13, 13 by the fixing handle 17 at any height.

As shown in FIG. 2, the support column 13 and the drawing frame support 15 of the elevating support column 14 are formed by an elliptical pipe having the same sectional shape. Further, the sliding pipes 16 and 16 are round pipes, and the drawing board frame support 1
It is inserted in the front and rear in 5 through the intermediate spacer 18 and the outer side spacers 19 and 19, and the intermediate spacer 18 is connected to the drawing board frame support body 15 by the screw 20, and the sliding tubes 16 and 16 are fixed. The outer spacers 19, 19 are formed by vertically cutting a pipe having substantially the same diameter as the sliding pipes 16, 16. Therefore, between the sliding tubes 16 and 16 and the front and rear inner walls of the picture frame support 15, the outer spacer 1
Clearance corresponding to the plate thickness of 9,19 is generated, and the column 13 and sliding tube 1
Sliding with 6, 16 can be done smoothly. The outer spacers 19,1
9 may be manufactured using the same tube material as the sliding tubes 16, 16.

The brake mechanism for fixing the elevating column 14 at an arbitrary height is composed of wedge pieces 22, 22 to be inserted into the holes 21, 21 ... Opened on the outer surface of the left and right columns 13, 13 and the left and right columns 13, 13. And a connecting shaft 24 housed in a reinforcing frame 23 for connecting.

The wedge piece 22 of the left support column 13 shown in FIG. 1 is connected to the end portion of the connection shaft 24 which penetrates between the sliding tubes 16 in the support column 13. As shown in FIG. 2, a screw portion 25 is engraved at the end of the connecting shaft 24, and one side of the outer peripheral surface of the screw portion 25 is cut to prevent rotation, and the wedge piece 22 is attached to the screw portion 25. Correspondingly shaped holes 22a are opened. And right prop 1
The screw portion 25 of the connecting shaft 24 is projected to the outside from the through hole 13a of 3, the wedge piece 22 and the washer 26 are inserted, and the fixing handle 17 is screwed. Therefore, when the fixing handle 17 is tightened, the left and right wedge pieces 22 and 22 are squeezed and the tip portions are press-fitted between the front and rear sliding pipes 16, 16, 16 and 16, respectively. , 16, 16, 16 are pressed against the front and rear inner walls of the columns 13, 13 to fix the elevating columns 14, 14.

The present invention should not be limited to the above-described embodiment, and the support column 13, the drawing plate frame support member 15, and the sliding tube 16 can be formed of not only a circular tube but also a tube material having a rectangular cross section. And it goes without saying that this invention extends to the modified ones.

[Effects of the Invention] As described in detail in the above-mentioned one embodiment, in this invention, the upper parts of the pair of sliding tubes 16 and 16 are inserted into the front and rear of the drawing board frame support body 15. An intermediate spacer 18 is interposed in the middle portion of the tubes 16 and 16, and outer spacers 19 and 19 are provided on the outer surface of each of the sliding tubes 16 and 16 with the inner surface of the drawing frame support 15. It is interposed between. Therefore, if the intermediate spacer 18 is fixed to the drawing board frame support member 15 by using, for example, a screw or the like, the intermediate spacer 18 and the outer spacers 19, 19 support the sliding tubes 16, 16 to the drawing board frame supporting body. Secure to body 15. At this time, due to the interposition of the outer spacers 19, 19, a clearance corresponding to the thickness of the outer spacers 19, 19 is generated between the sliding pipes 16, 16 and the inner side surface of the support column 13, and thus the sliding The sliding contact area between the moving pipes 16, 16 and the support column 13 becomes small, and the vertical movement of the elevating support column 14 is smoothly performed. As described above, since the clearance is secured by the thickness of the outer spacers 19, 19,
The accuracy of the clearance becomes constant, the quality control becomes easy, and the quality can be stabilized. In addition, since it is not necessary to process the protruding surface of the column as in the past, productivity can be improved and cost can be reduced.
It is also possible to manufacture 19,19 using the same tube material as the sliding tubes 16,16, which also contributes to the improvement of product quality.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a front view of a drafting table, and FIG. 2 is a partially cutaway perspective view showing essential parts,
FIG. 3 is a cross-sectional view of a main part showing a conventional example. 10 …… Drafting stand 11 …… Drawing plate frame 12 …… Legs 13 …… Posts 14 …… Elevating support posts 15 …… Drawing plate frame support 16 …… Sliding tube 17 …… Fixing handle 18 …… Intermediate spacer 19 …… Outside spacer

Claims (1)

[Scope of utility model registration request] 1. A lower part of a lifting column 14 having a drawing board frame 11 attached,
It is loosely inserted into a column 13 which is erected on the leg portion 12, and the elevating column 14 can be fixed at an arbitrary height by a fixing means provided on the column 13, and further, the column 13 and a picture frame support 15 Is formed of a tubular body having the same cross-sectional shape, and the lower portions of the pair of sliding tubes 16 and 16 are loosely inserted into the column 13, and the upper portions of the sliding tubes 16 and 16 are connected to the drawing board frame supporting member In the drafting table 10 fixed to the inner wall surface of the slide tube 16, the sliding tubes 16 and 16 are inserted in the front and rear of the drawing board frame support 15 through intermediate spacers 18 and outer spacers 19 and 19, and An elevating device in a drafting table, characterized in that the intermediate spacer 18 is fixed to the drawing board frame support 15 and the sliding tubes 16, 16 are fixed to the drawing board frame support 15.