JPS6119692Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a roller adjustment device for raising and lowering a drafting table.

As shown in Fig. 1, a drawing board frame a is pivotably attached to an underframe b by a pivot shaft c so that the underframe b can be tilted and adjusted, the underframe b is attached to the upper end of the slide support 1, and the slide support 1 is attached to the support. In a drafting table that is installed inside the support 2 so that it can be raised and lowered and stopped, the conventional roller adjustment device for raising and lowering the drafting table has rail members 3 made of round bars at the four inner corners of the support 2, as shown in FIG. In order to adjust the support position of the lifting rollers 4, roller support plates 5 for supporting the lifting rollers 4 made of ball bearings that roll the rail members 3 are attached to the outer surfaces of both sides of the slide column 1. An elongated inclined guide hole 6 was formed in the roller support plate 5, and the lifting roller 4 was attached to a flanged lock nut 7 which was slidably fitted into the elongated inclined guide hole 6 with a countersunk screw 8 via a spring washer. Therefore, it is impossible to adjust the lifting rollers 4 from the outside of the support 2, and when adjusting the lifting rollers 4, the drafting table must be disassembled and the slide support 1 must be removed from the support 2. Not only is this necessary, but it is also difficult and inconvenient to adjust all eight lifting rollers 4 evenly.

The present invention has been made in view of the above-mentioned circumstances, and provides a lifting roller adjustment device for a drafting table that can easily, accurately, and quickly adjust the lifting rollers without disassembling the drafting table. The purpose is to

In order to achieve the above-mentioned object, the present invention installs a slide column with a drawing board frame at its upper end so that it can be raised and lowered and stopped inside the column, and a pair of rail members are provided on the inner surfaces of both sides of the column. A lifting roller that rolls a member is supported by a pair of roller support plates, one roller support plate is attached to one outer surface of the slide column, and the other roller support plate is attached to the other outer surface of the slide column. The movable wedge-shaped cam member is fixed and loosened from the outside via a wedge-shaped cam member formed on the outer surface and a movable wedge-shaped cam member that engages with the wedge-shaped cam member, and the movable wedge-shaped cam member is moved along the inclination direction of the wedge-shaped cam member. The present invention is characterized in that the operating end of the roller support plate adjusting means for adjusting the other roller support plate is disposed at an upper portion between both supports.

In order to adjust the lifting roller, the other roller support plate is loosened from the outside using a tensioning tool to enable adjustment, and then the operating end of the roller support plate adjustment means is operated using the adjustment tool. Then, the movable wedge-shaped cam member is moved along the inclination direction of the wedge-shaped cam member, and the other roller support plate is moved in a direction closer to or farther from the outer surface of the slide column, so that the lifting roller is moved to the rail member. After proper pressure contact, the other roller support plate is fixed, and the adjustment operation of the lifting roller is completed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

An exploded perspective view of the main parts of the present invention is shown in Figure 3.
1 is a slide support, 2 is a support, 3 is a rail member,
4 is a lifting roller, and 5 and 5' are roller support plates, each of which is the same as shown in FIG.
There are eight lifting rollers 4, which are supported by screws 9 and nuts 10 on a pair of roller support plates 5, 5'. One roller support plate 5 is attached to one outer surface of the slide column 1. 11,1
Reference numeral 1' denotes a wedge-shaped cam member provided at the middle and lower portions of the other outer surface of the slide column 1, and the directions of the inclined surfaces are opposite to each other. Numerals 12 and 12' are wedge-shaped movable cam members that engage with the cam members 11 and 11', and their outer surfaces are formed parallel to, or perpendicular to, the other outer surface of the slide column 1. Reference numeral 13 denotes a screw, which is inserted into a hole 14 of the movable cam member 12 and screwed into a screw hole 14' of the movable cam member 12'. 15 is a compression spring interposed between the movable cam members 12 and 12';
It surrounds the screw 13. The other roller support plate 5', the movable cam members 12, 12', and the cam member 11,
A mounting hole 16, a guide elongated hole 17, and a screw hole 18 are formed at positions corresponding to the guide length 11', respectively, and a fixing bolt 20 having a recess 19 for engaging a bar spanner in the head is inserted between the mounting hole 16 and the guide length. Screw hole 1 via hole 17
8, the other roller support plate 5' is attached to the other outer surface of the slide column 1. Recessed part 1 for engaging the rod spanner of the fixing bolt 20
A small hole 21 for inserting a rod wrench is formed in the side wall of the column 2 so as to correspond to 9, so that the fixing bolt 20 can be rotated from the outside side of the column 2 using a rod spanner 22. ing. 23 is screw 13
The head 23 is formed at the upper end and functions as an operating end. It is designed so that it can be rotated from The movable wedge-shaped cam members 12, 12' are moved along the inclination direction of the wedge-shaped cam members 11, 11' by the cam members 11, 11', the movable cam members 12, 12', the screw 13, and the compression spring 15. At least a roller support plate adjusting means 24 for adjusting the other roller support plate 5' is constituted. The positions where the roller support plate adjustment means 24 and the rail member 3 are provided are not limited to the illustrated embodiment.

The elevating roller adjusting device for a drafting table according to the present invention is constructed as described above, and in order to adjust the elevating roller 4, the tip of the rod spanner 22 as a tightening tool is inserted through the small hole 21 into the recess. 19 is engaged and rotated to loosen the fixing bolt 20, the roller support plate adjusting means 24 becomes adjustable. Next, screw 1
When a box spanner as an adjustment tool (not shown) is engaged with the head 23 of 3 from above and rotated, the movable wedge-shaped cam members 12 and 12' move into the wedge-shaped cam member 1.
1, 11' along the inclination direction,
Since the other roller support plate 5' moves toward or away from the outer surface of the slide support 1,
After the lifting rollers 4, . . . are brought into proper pressure contact with the rail members 3, .

As can be easily understood from the above explanation,
According to the present invention, the lifting rollers can be easily adjusted from the outside with the slide support attached to the support without disassembling the drafting table, and the lifting rollers can be easily adjusted without having to adjust the lifting rollers individually. Since the roller support plate supporting the four lifting rollers vertically is maintained in a vertical position during adjustment, the lifting rollers can be adjusted easily, accurately, and quickly.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a drafting table, FIG. 2 is an exploded perspective view showing an elevating roller adjustment device of the drafting table, and FIG. 3 is an exploded perspective view of essential parts of the present invention. a: Drawing board frame, 1: Slide support, 2: Support,
3: Rail member, 4: Lifting roller, 5, 5':
Roller support plate, 9: screw, 10: nut, 11,
11': Wedge-shaped cam member, 12, 12: Wedge-shaped movable cam member, 13: Screw, 14: Stud hole, 14': Screw hole, 15: Compression spring, 16: Mounting hole, 17: Guide slot, 18: Screw hole, 19: recess, 20: fixing bolt, 21: small hole, 22: bar spanner, 23: head, 24: roller support plate adjustment means.

Claims (1)

[Scope of utility model registration request] A slide column with a drawing board frame at its upper end is installed inside the column so that it can be raised and lowered and stopped, a pair of rail members are provided on the inner surfaces of both sides of the column, and a pair of rollers is used for lifting and lowering the rails. A wedge-shaped cam member supported by a support plate, one roller support plate attached to one outer surface of the slide column, and the other roller support plate formed on the other outer surface of the slide column; and the wedge-shaped cam. Roller support plate adjustment that is fixedly and loosenably mounted from the outside via a movable wedge-shaped cam member that engages with the member, and adjusts the other roller support plate by moving the movable wedge-shaped cam member along the inclination direction of the wedge-shaped cam member. 1. A roller adjustment device for raising and lowering a drafting table, characterized in that an operating end of the means is disposed at an upper portion between both supports.