JPH0436951Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The invention is based on the invention: rails are attached along the left and right edges of the drawing board, and each rail is equipped with a movable carriage that holds both ends of the straightedge. The present invention relates to a parallel ruler attached for drawing, and particularly to a brake device for the parallel ruler.

<Prior art> Rails are attached along the left and right edges of the drawing board, and a carriage is movably attached to each of these rails, and both ends of a straight ruler are attached and supported to the ruler holders of each of the carriages. The conventional carriage braking device used in parallel ruler devices is actually positioning the carriage by attaching the braking device to the carriage body and fixing it to the rail. A device in which a ruler is installed in a holding member connected to the vertical cursor, in which a spring is removably attached to a shaft that rotates in conjunction with the movement of the vertical cursor (Utility Model Application No. 57-78990) ), or when positioning a cursor sliding along a linear member at a desired position on the linear member, a restraining member consisting of a clamping body and a clamping plate applies equal opposing pressure to both sides of the linear member. There is a clamping device (see Utility Model Publication No. 50-33237).

<Problems to be solved by the invention> However, with the brake device according to the above method, especially when using a large drawing board, the brake device is attached to the carriage body, so the carriage is located behind the drawing board, making it difficult for the drafter to use. As the position of the brake device moves away from the position of , the brake device also moves away, and there is a problem in that it becomes difficult for the drafter to operate the brake.

Therefore, the object of the present invention is to provide a parallel ruler brake device that allows the drafter to easily operate the carriage brake by placing the operation knob of the brake device at the drafter's hand regardless of the position of the carriage. do.

<Means for solving the problems> In order to achieve the above-mentioned problems, the present invention installs rails along both left and right edges of the drawing board, and
A carriage is attached to each of these rails to attach and support both ends of the straight ruler to the ruler holder.
Further, in a parallel ruler device in which left and right timing belts disposed in each of the rails are connected to a connecting rotating shaft, in order to move the carriages in parallel while maintaining a constant positional relationship with each other,
The present invention is characterized in that a brake device that clamps the timing belt is disposed near an end on one side of the drawing board.

<Function> The carriage brake operation in this invention is as follows:
Perform the following steps.

First, when the carriage is moving, the timing belt is not fixed to the rail and is movable. Therefore, as the timing belt moves, each carriage can be moved along the rail while maintaining a constant positional relationship with each other by the connected rotary shaft.

From this state, operate the operation knob to press and secure one timing belt against the rail. Then, by preventing movement of the timing belt, a brake is applied to the carriage, and the carriage is positioned.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

In the parallel ruler to which the present invention is applied, first, as shown in FIG. 3, rails 2 and 3 are attached to both side edges of a drawing board 1 so that they are parallel to each other. Carriages 4 and 5 are attached to the rails 2 and 3, respectively, and the left and right timing belts 6 and
7 and a connecting rotary shaft 8 that interlocks with these timing belts 6, 7, it is configured to move in parallel along the rails 2, 3 with a constant positional relationship. The carriages 4 and 5 have ruler holders 9 and 10, respectively, and both ends of a straight ruler 11 are attached to the ruler holders 9 and 10.

On the drafter's side of one rail 2 of the parallel ruler as described above (near the end of one side of the drawing board 1), that is, in this example, on the lower side in FIG. A brake device 20 for fixing the timing belt 6 to the rail 2 is disposed near the timing belt roller 12 of the timing belt 6 disposed on the rail 2.

As is clear from FIGS. 1 and 2, this brake device 20 includes an operation knob 21 and a presser member 22.
and an abutment piece 23, which are attached to an opening hole 14 in a recess 13 formed on the drafter side of the rail 2. The operation knob 21 has a stepped portion 24 in its center.
A through hole 25 is formed, and this through hole 25
A female thread is formed on the inner wall of the holder. A threaded portion 26 of the holding member 22 is screwed into this through hole 25 from inside the rail 2 via an abutment piece 23. This presser member 22 has a presser piece 28 disposed on the distal end side facing the threaded portion 26 . This holding piece 28 is attached so that one end thereof comes into contact with the inner wall 2a of the rail 2 so that the holding member 22 does not rotate. Therefore, when the operation knob 21 is rotated, the presser member 22 is moved up and down by the action of the female thread of the through hole 25 and the threaded portion 26. However, the set screw 2 is attached to the tip of this threaded portion 26 from the stepped portion 24 side of the operation knob 21.
7 are screwed together, and the holding member 22 cannot move downward beyond a certain range. Further, the other end of the presser piece 28 comes into contact with the timing belt 6 as the presser member 22 rises, thereby pushing the timing belt 6 upward. Therefore, the operation knob 2
1 and move the presser member 22 upward in FIGS. 1 and 2, the presser piece 28 pushes up the timing belt 6 and presses it against the contact piece 23, fixing the timing belt 6 to the rail 2. This prevents the timing belt 6 from moving. Therefore, if movement of the timing belt 6 is prevented, this timing belt 6
The brake is applied to the carriage 4 attached to the Note that if the timing belt 6 is fixed to the rail 2 and movement of the timing belt 6 is prevented, since the timing belt 7 is also connected by the connecting rotary shaft 8, its movement will be blocked and the carriage 5 will be The brakes will also be applied.

When the brake is released, if the operating knob 21 is rotated in the opposite direction to that used when braking, the holding member moves downward in FIGS. The carriage 4 can be moved freely by being released from the carriage 4 and being able to move freely.

<Effects of the invention> Therefore, according to the invention, the operation knob of the brake device can always be placed at the drafter's hand regardless of the position of the carriage, and it is possible to arrange the operation knob of the brake device in parallel position so that it is easy for the drafter to operate the brake of the carriage. Ruler brake device can be provided.

[Brief explanation of the drawing]

FIG. 1 is an enlarged side sectional view of the waist of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a plan view showing an outline of a parallel ruler device to which the present invention is applied. 2, 3...rail, 4,5...carriage,
6, 7...Timing belt, 8...Connection rotating shaft, 20...Brake device, 21...Operation knob, 22...Press member, 23...Abutting piece, 28...
...presser piece.

Claims (1)

[Claims for Utility Model Registration] Rails are installed along the left and right edges of the drawing board, and each of these rails is equipped with a carriage for assembling and supporting both ends of the straightedge in a ruler holder. In a parallel ruler device, in which the left and right timing belts disposed in each of the rails are connected to a connecting rotating shaft in order to move in parallel while maintaining a constant positional relationship with each other, A brake device for parallel rulers, characterized in that a brake device is arranged to sandwich the timing belt at a certain position.