JPS6111035Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sliding button device for the head of a track type universal parallel ruler.

Conventionally, a sliding button provided on the bottom of the head for scale operation has been used as a member that allows the head and scale to slide smoothly on the drawing surface. It was fixed integrally to the bottom, and there was no thought of adjusting its height when using it.

However, according to the inventor's experience, changing the height of the slide button changes the degree of adhesion and frictional resistance of the head and bottom of the scale to the drawing surface, which not only greatly affects scale operation, but also causes adverse effects. It has also been found that the optimum height of the slide button changes slightly depending on various factors such as the weight of the head, the angle of the drawing board, and the preferences of the drafter.

Therefore, the present invention aims to provide a sliding button device for the head section that is equipped with a sliding button that allows the drafting worker to operate the scale in an optimal state depending on the usage situation of the universal parallel ruler and the model of the head section. The gist of this is that a sliding button is provided on the bottom surface of the head section for operating the scale, the height of which can be adjusted freely up and down.

The present invention will be explained in detail with reference to the embodiments shown below. In FIGS. 1 and 2, 1 is a drawing board;
2 is a horizontal rail fixed along the upper edge of drawing board 1;
3 is a vertical rail that moves in the left-right direction while keeping its upper end perpendicular to the horizontal rail 2, 4 is a vertical rail support provided at the bottom end of the vertical rail 3, and 5 is a lower part provided on the vertical rail support 4. A roller 6 is a lower rail on which the lower roller 5 runs, and is fixed to the lower edge of the drawing board 1. A cursor plate 7 is movably guided on the lower surface of the vertical rail 3, and a head support 9 is connected to the cursor plate 7 via a connecting member such as a link mechanism 8. Reference numeral 10 denotes a scale operating head section which is rotatably and fixedly supported by the head section supporter 9, and the head section 10, the head section bottom 11, and the scale 12 are constructed to interlock with each other.

In the conventionally known configuration described above, the device of the present invention is equipped with a slide button 14 whose height can be adjusted vertically by rotating an adjustment knob 13. That is, as shown in FIGS. 3 and 4, in the case of the embodiment, the sliding button 14 according to the present invention has a screw shaft portion that is screwed into a screw hole of a support member 15 that rotates together with the bottom portion 11 of the head portion. 14a is provided at the upper end, and a worm gear portion 14b is integrally provided at the middle portion. On the other hand, the adjustment knob 13 is equipped with a support shaft 17 rotatably supported by bearings 16a and 16b of the bottom portion 11 of the head portion, and a worm 18 that engages with the worm gear portion 14b of the slide button 14 is attached to the support shaft 17. It is provided. Reference numeral 19 denotes a fixing screw provided intersecting with the one bearing portion 16a of the head bottom portion 11, and by tightening this screw, the support shaft 1 is fixed.
7 can be fixed.

In the embodiment of the device of the present invention having the above configuration, when the adjustment knob 13 is rotated, the worm gear portion 14b is rotated by the worm 18, and the screw shaft portion 14a screwed into the support member 15 rotates the worm gear portion 14b. The height of the slide button 14 can be adjusted so that it can move up and down.

In addition, for example, as another example, the worm 18
It is also possible to adjust the height of the sliding button 14 by using a pinion, making the worm gear part 14b easy, and having the screw shaft part 14a be guided by the support member 15 as a smooth vertical guide surface. In the case of the rack-and-pinion type, unlike the case of the worm gear type, the stopper action does not work on the occlusal part, so a fixing means such as the fixing screw 19 is required, and fine adjustment operations are also difficult. Adjustment of the height of the slide button can thus be carried out in various other ways within the scope of the invention.

As described above, according to the sliding button device for the head of the track type flexible parallel ruler according to the present invention, a sliding button whose height can be adjusted freely up and down is provided on the bottom surface of the head for operating the scale that comes into contact with the drawing surface. With this structure, the drafting operator can change the degree of adhesion and frictional resistance of the head and the bottom of the scale to the drawing surface according to the weight of the head, the angle of the drawing board, his or her own drawing technique, and his or her own preferences. By performing drafting work at the optimum height of the slide button, work efficiency can be greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the track type flexible parallel ruler according to the present invention, Fig. 2 is a front view showing an enlarged part of the ruler, and Fig. 3 is a main part of an embodiment of the device of the present invention. FIG. 4 is a side view of the main parts thereof. 1...Drawing board, 3...Vertical rail, 10...Head part, 11...Head part bottom, 12...Scale,
13...adjustment knob, 14...slide button, 15
...Support member, 17... Support shaft, 18... Worm.

Claims (1)

[Scope of utility model registration request] A sliding button device for a head part of a track type universal parallel ruler, characterized in that a sliding button whose height can be adjusted freely up and down is provided on the bottom surface of the head part for operating a scale that comes into contact with the drawing board surface.