JPH0114461Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention involves attaching rails to both the left and right sides of the drawing board, assembling a carriage to each of these rails so that they can move freely while maintaining a fixed positional relationship, and further attaching a pivot to each of the above-mentioned carriages. The present invention relates to a parallel ruler device in which both ends of a straight ruler are assembled and supported by a supported ruler holder, and particularly to a ruler support mechanism that allows the ruler to be easily tilted.

In conventional parallel ruler devices, both ends of the straight ruler are attached to a ruler holder by screws. A long hole for sliding a ruler is formed in the screw receiving portion of the holder in the front-rear direction of the drawing board.
When tilting the ruler, loosen each of the screws and move one end of the ruler forward or backward of the drawing board by moving it through the elongated hole of the screw. There is.

By the way, in the above conventional parallel ruler device,
In order to tilt the straightedge, it is necessary to loosen and tighten each of the screws mentioned above, and the operation of tilting the ruler is complicated.

The present invention has been proposed in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a new ruler support mechanism that allows a straight ruler to be easily tilted.

That is, the present invention includes rails attached to both the left and right sides of a drawing board, and a carriage that is attached to these rails so that they can move freely while maintaining a certain positional relationship, and that is also able to move independently. A holder attached to each of the above-mentioned carriages, a ruler receiving member attached to the holder and formed with a ruler supporting recess into which the end of the straight ruler is inserted, and a ruler supporting member inside the ruler supporting recess of the ruler receiving member. The present invention is characterized in that it has a slide tip disposed on the straight edge and abutting one side of the straight ruler, and a connecting member rotatably connecting the holder and the ruler receiving member.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is an external plan view of a parallel ruler device according to the present invention. In this parallel ruler device 1, guide rails 3 and 4 are attached to both left and right sides of a rectangular drawing board 2. Timing belts 5 and 6 are disposed in each of these rails 3 and 4 so as to run freely, and carriages 7 and 7 are mounted on each of these belts 5 and 6 to maintain a fixed positional relationship with each other. 4 so that it can run along the

As shown in FIGS. 2 and 3, ruler holders 10, 10 constituting the ruler support mechanisms 9, 9 are mounted on the outer surfaces 7A, 7A of each of the above-mentioned carriages 7, 7, with hinges 11, 11 serving as fulcrums. It is pivoted so that it can be folded down.

The holder 10 includes a holder body 12 pivotally supported by the carriage 7, and a holder body 12 that is pivotally supported on the carriage 7.
A ruler receiving member 14, which will be described later, is rotatably attached to a horizontal surface 12A formed at the upper end of the holder body 12 by a screw 13, which is a connecting member that connects the holder main body 12. .

The back surface 14A of each of the ruler receiving members 14, 14,
On the 14A side, as shown in Figures 4 and 5,
Ruler supporting recesses 16, 16 are formed to slidably accommodate and support both ends 15a, 15a of the straight ruler 15.

A wedge-shaped slide tip 17 is disposed within the ruler supporting recess 16. This slide tip 17 is arranged so that the end 15a of the ruler 15 accommodated in the recess 16 can slide smoothly and linearly within the recess 16 without rattling. It functions to guide the side surface (lower end surface in FIG. 5) while receiving the side 15A. Note that the ruler 15 is fixed to the back surface 18A of the elongated ruler mounting plate 18 by means of fixing means such as double-sided adhesive tape, and both ends 18a and 18b of the mounting plate 18 are attached to the recess 16, 16 so as to be slidably supported. That is, the above mounting plate 1
Guide grooves 1 are provided on both sides 18B and 18C of 8.
9 and 20 are formed over the entire length, and within the recess 16, the slide tip 17 fits into a recess 19 on one side 18B of the mounting plate 18, and the slide tip 17 is fitted into a recess 19 on one side 18B of the mounting plate 18. inner surface 16 of
The rib 21 formed at A is attached to the mounting plate 18.
It is shaped to fit into the groove 20 on the other side 18B side. Therefore, one side 18B of the mounting plate 18 is guided by the straight surface 17A of the slide chip 17, and the other side 18C of the mounting plate 18 is guided by the tip end surface of the rib 21.

The slide tip 17 is fixed to the lower inner surface 16B of the recess 16 by screws 22, 22 and nuts 23, 23. In addition, in the slide tip 17, the screw insertion holes 24, 24
is formed horizontally, and the slide tip 17
can be adjusted to move in the left-right direction within the distance of the width of the screw insertion holes 24, 24. Therefore, the ruler mounting plate 18 can be positioned within the recess 16 so that the drawing board 2 does not wobble in the front-rear direction.

Further, in the groove 20 on the other side surface 18C of the mounting plate 18, there is a long hole 25 for setting the ruler slide distance.
is formed. A shaft portion 26a of a screw 26 arranged to protrude inward from the upper inner surface 16A of the recess 16 is engaged in each of the elongated holes 25. Therefore, the ruler 15 is capable of sliding in the left-right direction within the distance of the width of the elongated hole 25.

When inclining the ruler 15 in order to draw a sloped line, first the respective carriages 7, 7
The coupling mechanism (not shown) that rotationally drives the timing belts 5, 6 is released so that the timing belts 5, 6 can maintain a constant positional relationship with each other, and the carriages 7, 7 can travel independently. Then, one end 15a of the ruler 15 is moved in the front-rear direction of the drawing board 2, as shown in FIG.
Then, the ruler 15 slides in the left and right direction with the movement, and each of the ruler receiving members 1
4 and 14 follow the above movement while rotating about the screw 13 relative to the holder bodies 12 and 12, and can support the ruler 15 in an inclined state.

In this way, the ruler support mechanism 9 having the above configuration
According to the present invention, there is no need to rotate the ruler fixing screw as in the prior art, and the ruler 15 can be tilted simply by rotating the ruler 15 in a desired direction, making the tilting operation of the ruler 15 easy. Furthermore, since both ends 15a, 15a of the ruler 15 are supported by the respective holders 10, 10 in a slidable and rotatable manner (like a universal joint), no load is applied when the ruler 15 is tilted. Therefore, the ruler 15 can be tilted smoothly. Also, when the ruler 15 is tilted, the rotation fulcrum of the ruler 15 (the ruler receiving member 14,
14 does not move in the left-right direction of the drawing board 2, it is possible to draw a radial line with the same center of rotation. Also, both ends 15a, 15a of the ruler 15 are
are supported by a universal joint, so even if the ruler 15 is placed in an inclined position and is operated upside down on the drawing board 2 together with the holders 10, 10, the relationship between the ruler 15 and the holders 10, 10 will not be affected. The ruler 15 can be turned upside down smoothly without putting any strain on the assembly part.

On the other hand, as shown in FIGS. 7 and 8, inner surfaces 12B, 12B of each of the holder bodies 12, 12
Eccentric cams 28, 28, which serve as rotating cams constituting the ruler elevating mechanism 27, are rotatably attached to the ruler. The tip 29a of the rotating shaft 29 of the cam 28
is fitted into a shaft insertion hole 30 formed in the holder body 12 so as to protrude from the outer surface 12C of the holder body 12. The tip 29a of the rotating shaft 29 is formed into a prismatic shape, and a cam rotation operating lever 3 is attached to the tip 29a.
1 is installed. The cam 28 and the operating lever 31 are connected in the axial direction by a screw 32 inserted axially into the rotary shaft 29 from the lever 31 side and a nut 33 screwed onto the tip of the screw 32. It is fixed so that it does not come off.

In addition, in the cam 28, one side surface 28A that is in contact with the inner surface 12B of each of the holder main bodies 12
A click ball 36 is disposed in a recessed hole 34 formed in a part of the hole 34 and is elastically biased by a compression coil spring 35 so as to always protrude outward. In addition, the inner surface 1 of the holder main body 12
2B, hemispherical recesses 37a, 37b, and 37c are spaced at predetermined intervals on the rotation locus of the ball 36 to fit with the ball 36 and to engage the holder main body 12 of the cam 28. It is formed. In this embodiment, three recesses 37a, 37b, and 37c are formed, and the rotation of the cam 28 is stopped at three locations.

On the other hand, as shown in FIG. 9, in each of the carriages 7, 7, there are
Cam holding units 38, 38 that serve as cam receiving parts
is installed. This cam holding unit 38
includes a cylinder portion 39 fixed on the base 7B of the carriage 7, a piston portion 40 fitted into the cylinder portion 39 so as to be slidable in the vertical direction, and a piston portion 40 disposed within the cylinder portion 39. The piston portion 40 is provided with a compression coil spring 41 that elastically biases the piston portion 40 so as to always protrude upward. Note that an outward flange portion 42 is formed at the lower end of the piston portion 40, and this flange portion 42 engages with an inward flange portion 43 formed at the upper end of the cylinder portion 39. The end of upward movement of the piston portion 40 is determined.

The cam surface 28B of the cam 28 is configured to abut and be received by the upper end surface 40A of the piston portion 40.

The cam 28 and the cam holding unit 38 may be disposed relative to the holder main body 12 and the carriage 7, and the cam 28 may be disposed on the carriage 7 side and the cam The holding unit 38 may be disposed on the holder body 12 side.

Next, regarding the action of the ruler lifting mechanism 27,
This will be explained according to FIGS. 9 and 10.

When drawing a line using the straightedge 15, as shown in FIG. The cam 28 is rotated so as to come into contact with the upper end surface 40A of the portion 40. By this operation, the ruler 15 becomes
The back surface 15B of the ruler 15 is the top surface 2A of the drawing board 2.
It will be in a state where it is supported in a state where it is in contact with. In addition,
At this time, the click ball 39 is inserted into the first recess 37 of the recesses 37a, 37b, and 37c.
a to lock the rotation of the cam 28.

In addition, when moving the ruler 15 in the front-rear direction on the drawing board 2, as shown in FIG. The cam 28 is rotated so that the surface 45 comes into contact with the upper end surface 40A of the piston portion 40. By this operation, the ruler 15 including the holder 10 is moved by the elastic force of the compression coil spring 41 that elastically biases the piston portion 40 via the cam 28.
5 is supported at a position where the back surface 2B of the drawing board 2 floats a predetermined distance above the top surface 2A of the drawing board 2. At this time, the click ball 36 is fitted into the third recess 37c of the recesses 37a, 37b, and 37c, thereby locking the cam 28 from rotating.

The second recess 37b of the recesses 37a, 37b, and 37c is used to support the ruler 15 slightly above the drawing board 2, such as during inking work.

In this way, the ruler lifting mechanism 2 having the above configuration
According to No. 7, the straight ruler 15 can be raised and lowered with a single touch by only rotating the cam 28, which is highly effective in drafting work where the ruler 15 is frequently raised and lowered. It is.

Further, according to the ruler elevating mechanism 27, the predetermined amount of rotation of the cam 28 can be determined by clicking, and the predetermined amount of elevating and lowering the ruler 15 can be easily confirmed.

As is clear from the above explanation, according to the ruler support mechanism of the parallel ruler device according to the present invention, when tilting the straight ruler, there is no need to loosen or tighten the screws as in the conventional case, and there is no need to loosen or tighten the screws as in the conventional case. Simply rotate the ruler around the connecting member by hand.

Therefore, the tilting operation of the straight edge can be easily performed.

Further, in the present invention, since the slide tip is disposed in the ruler supporting recess of the ruler receiving member into which the straight ruler is inserted, it is possible to reliably prevent the straight ruler from wobbling, so that it is possible to accurately You can make detailed drawings.

[Brief explanation of the drawing]

Fig. 1 is an external plan view of a parallel ruler device showing an embodiment of the present invention, Fig. 2 is an enlarged perspective view showing how the edge of the straight ruler is supported, Fig. 3 is a side view thereof, and Fig. 4 is FIG. 5 is an enlarged exploded perspective view of the ruler holder, FIG. 5 is an enlarged plan view showing the relationship between the ruler receiving member and the ruler, and FIG.
The figure is a plan view showing the position of the ruler when it is tilted, Figure 7 is an exploded enlarged perspective view showing the relationship between the ruler holder body and the eccentric cam, and Figure 8 is the assembled state of the holder body and cam. A cross-sectional enlarged plan view showing
FIGS. 9 and 10 are enlarged side views illustrating the action of the cam. 1... Parallel ruler device, 2... Drawing board, 3, 4...
Rail, 7, 7... Carriage, 9, 9... Ruler support mechanism, 10, 10... Ruler holder, 12,
12... Holder body, 14, 14... Ruler receiving member, 15... Straight ruler, 15a, 15b... Both ends.

Claims (1)

[Scope of Claim for Utility Model Registration] Rails attached to the left and right sides of the drawing board, and a carriage that is attached to each of these rails so that they can move freely while maintaining a certain positional relationship, and can also move independently. and a holder attached to each of the above carriages, a ruler receiving member attached to the holder and formed with a ruler supporting recess into which an end of the straight ruler is inserted, and a ruler supporting member of the ruler receiving member. A ruler support mechanism for a parallel ruler device, comprising: a slide tip disposed in a recess and abutting one side of the straight ruler; and a connecting member rotatably connecting the holder and the ruler receiving member.