JP2952871B2 - Scale angle adjustment device for parallel ruler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting the angle of a scale in a parallel ruler for adjusting the angle of the scale in accordance with the base line of a sheet on a drawing board.

[0002]

2. Description of the Related Art Generally, a parallel ruler is configured so that a scale moves in parallel. By the way, when a drawing is pasted on a drawing board, the baseline of the drawing and the scale are not always parallel. Therefore, it is necessary to adjust the angle of the scale so as to match the baseline of the drawing.

However, in the conventional angle adjusting device, as shown in FIG. 7, fixing knobs 31 are provided at both ends of a scale 30, and a bracket 3 for supporting the scale 30 is provided.
The mainstream is one in which the knob mounting portion formed in 2 is formed as a long hole (not shown) so that the axis of the knob 31 can be moved and adjusted along the long hole by a required amount in the direction of the arrow. Therefore, when adjusting the angle, you have to loosen and fix the left and right knobs one by one.
In addition to the troublesome adjustment operation, the knobs protrude from the upper surfaces of the left and right ends of the scale, so that there were drawbacks such as the elbows being obstructed during drawing work.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for adjusting the angle of a scale in a parallel ruler which can solve the above-mentioned drawbacks, facilitate the angle adjustment operation, and facilitate the drawing operation. And

[0005]

In order to achieve the above object, an apparatus for adjusting the angle of a scale in a parallel ruler according to the present invention comprises a carriage supporting a scale along rails fixed to both sides of a drawing board, In the parallel ruler, wherein the carriage is connected to endless wires arranged along both ends of the rail, and the carriages on both sides are moved by the same amount in the same direction, at least one carriage is connected to the endless wire. An operation lever that adjusts the connecting position with respect to the rail is arranged on the side of the rail ,
A bulging portion for regulating the connection position at two places of the endless wire
And fix the carriage between these two bulges.
The connection position is adjusted .

[0006]

According to the first aspect of the present invention, when starting the drawing operation, when adjusting the angle of the scale corresponding to the base line of the drawing stretched on the drawing board, the operation lever is operated. The connection position between the wire and the carriage may be appropriately adjusted by operation.

Further , since the operation lever is disposed on the side of the rail, and there is no protrusion such as a conventional operation knob on the upper surface of the left and right ends of the scale, drawing work can be performed smoothly.

Furthermore, since the adjustment of the connecting position between the wire and the carriage is restricted between two膨突unit, after the angle adjustment smooth movement of the scale it is secured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a parallel ruler device, which comprises a carriage 3 supporting a scale 2 on both sides of a drawing plate 1,
The scale 2 is moved in parallel by moving the carriages 3 on both sides in the same direction by the same amount.

A pencil case 4 is disposed on the near side of the drawing board 1, and rails 5 are fixed to both sides of the drawing board 1.
Two rollers 6 are arranged at both ends (four corners of the drawing plate 1) of the rail 5, and an endless steel wire 7 for synchronizing the movement of the carriage 3 on both sides is mounted on these rollers 6 in FIG. It is wound like. The carriage 3 is connected to both sides of the wire 7.

[0011] Figure 3 is the shaft 10 on both sides of the carriage 3 (a)
(b) As shown in FIGS. 4 and 5, a traveling roller 9 that rotates on a traveling ridge 8 formed on the rail 5 is mounted on the shaft. A support shaft 11 is screwed to one end of the carriage 3, a bracket 12 is rotatably mounted on the support shaft 11, and the bracket 12 supports both ends of the scale 2. A torsion coil spring 13 is attached to the support shaft 11. The tips of both spring pieces 13a and 13b extending from the coil center of the torsion coil spring 13 engage with the engagement holes 29 of the carriage 3, and the upper spring piece 1
The projection 14 of the bracket 12 is in contact with 3a. For this reason, the scale 2 is driven by the spring force of the torsion coil spring 13.
Are floating at a certain interval from the drawing board 1.

[0012] Next, the wire 7 and the connection between the carriage 3 includes a fixing bracket 15 fixed to the carriage 3, the movable member 16 provided so as to be closer and away from the fixed metal fitting 15
This is performed by sandwiching the wire 7 between the two. One side is detachably connected to the wire 7 by a simple operation, and the other side is fixed to the wire 7.

On one side, the fixing bracket 15 includes a pair of mounting pieces 17 mounted on the side surface of the carriage 3,
It is constituted by a U-shaped piece 18 formed between both mounting pieces 17. At the tip of the U-shaped piece 18, a pressing portion 19 that can contact the wire 7 is formed to protrude.
A screw shaft 20 protrudes from the inside.

The movable bracket 16 is formed in a plate shape. A through hole 21 is formed in the center of the movable bracket 16 so as to penetrate the screw shaft 20, and a holding section 22 corresponding to the holding section 19 of the fixing bracket 15 is formed. Have been. Further, a shaft 24 having an operation lever 23 penetrates through the center of the carriage 3, and a female screw portion 25 screwed to the screw shaft 20 is formed at an end of the shaft 24. The operation lever 2
3 is arranged on the side of the rail 5, and the shaft 24 is
6 are formed larger in diameter than the through holes 21. Shaft 24
Is screwed along the screw shaft 20 so that the shaft body 24 moves the movable bracket 16 closer to the fixed bracket 15 side, and finally, the pressing portion 19 of the fixed bracket 15 and the pressing of the movable bracket 16 are stopped. The wire 7 is sandwiched and fixed to the portion 22. FIGS. 3 (b) and 4 (solid line portions) show such a fixed state.

By the way, the endless wire 7 is stretched in the one side in the two places are formed膨突26,27, the fixing bracket 15 and movable between the膨突portions 26 and 27 The carriage 3 and the wire 7 are connected by the metal fitting 16.

The one protruding portion 26 may be formed by a metal terminal connecting both ends of the steel wire 7, and the other protruding portion 27 may be formed by passing a metal ball through the wire 7 and tightening it.

Next, the connection between the wire 7 and the carriage 3 of the other side, as shown in FIG. 3 (a), the pressing portion and the pressing member 16 of the fixing bracket 15 of the same structure as the fixed metal fitting 15 This is performed by sandwiching the wire 7 therebetween and fastening the wire 7 with a screw 28.

[0018] In this way, both sides of the carriage 3 is moved to one of the carriage 3 in a state of being connected to the wire 7, in synchronization with this other carriage 3 moves by the same amount in the same direction. Therefore, the scale 2 supported by the carriage 3 via the bracket 12 moves in parallel.

[0019] According to the above construction, when starting the drawing operation, when adjusting the angle of the scale 2 corresponds to the base line of the drawing which is stretched on FIG plate 1, the operating lever 2
3 may be turned downward as shown by the dotted line in FIG.
The shaft 24 integral with the operation lever 23 rotates in the same direction, the movable bracket 16 separates from the fixed bracket 15, and the connection between the carriage 3 and the wire 7 is released as shown in FIG. Therefore,
The carriage 3 is shifted along the wire 7 to change the angle of the scale 2, and the operation lever 23 is again rotated in the original direction at a position corresponding to the base line in the drawing to move the carriage 3.
May be connected and fixed to the wire 7.

By the way, during the adjustment operation, the two endless wire 7 from膨突26, 27 is fixed, the connection between the wire 7 and the carriage 3膨突unit 26,2
You cannot do more than seven. Therefore, the angle adjustment of the scale 2 by changing the connection position of the carriage 3 with respect to the wire 7 is restricted between the two protrusions 26 and 27 arranged on the wire 7. The reason is that it is sufficient if the normal angle adjustment is performed between the two protruding portions 26 and 27, and the carriage 3 and the wire 7 are connected to each other over the protruding portions 26 and 27 so that the rail 5 travels. If the deviation between the direction of the ridge 8 and the traveling direction of the traveling roller 9 becomes too large, the scale 2 is fixed and the carriage 3
This is because smooth movement is hindered due to lack of smooth movement. In order to ensure smooth movement of the scale 2, the angle of the scale 2 with respect to the base line only needs to be about 1 °, and the interval between the two protrusions 26 and 27 is determined correspondingly. .

[0021] As described above, according to the angle adjustment device of the scale 2 mentioned above, by a simple operation of rotating the operation lever 23, corresponding to the base line of the drawing by changing the connection position of the wire 7 and the carriage 3 Thus, the angle of the scale 2 can be adjusted.

The operation lever 23 is disposed on the side of the rail 5 and there is no protrusion like a conventional operation knob on the upper surface of the left and right ends of the scale 2, so that the drawing operation can be performed smoothly.

Furthermore, since the adjustment of the connecting position between the wire 7 and the carriage 3 is carried out between the two膨突26,27, after the angle adjustment smooth movement of the scale 2 is secured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a parallel ruler according to the present invention.

FIG. 2 is an explanatory view of a state in which the parallel ruler is stretched by wires.

FIGS. 3 (a) and 3 (b) are enlarged cross-sectional explanatory views of left and right connecting portions of a wire and a carriage in the parallel ruler, respectively.

FIG. 4 is a side view of a carriage portion of the parallel ruler.

FIG. 5 is an exploded perspective view of a connection portion between a wire and a carriage.

FIG. 6 is a sectional view showing a state in which the connection between the wire and the carriage is released.

FIG. 7 is a perspective view of a conventional parallel ruler.

[Explanation of symbols]

 1 drawing board 3 carriage 5 rail 7 wire 23 operation lever 26 bulging part 27 bulging part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B43L 13/02

Claims (1)

(57) [Claims] 1. A carriage supporting a scale along rails fixed to both sides of a drawing board, the carriage being connected to endless wires disposed along both ends of the rail, and the carriages on both sides being connected to each other. In a parallel ruler that is moved by the same amount in the same direction, an operation lever for adjusting a position at which at least one carriage is connected to the endless wire is arranged on a side of the rail , and the endless wire is arranged. Bulges for regulating the connection position
Fix the projections and carry the carriage between these two projections.
An angle adjusting device for a scale in a parallel ruler , wherein the connecting position of the scale is adjusted.