JPH0576797U - Parallel ruler - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a parallel ruler device that uses an endless wire as a synchronous movement mechanism for left and right carriages and can reliably connect the endless wire to a carriage without damaging the endless wire. . An endless wire 8 is used as a synchronous moving means for the left and right carriages 4, 4, and an operation member 18 for wire connection operation is held on the carriage 4 and the endless wire 8 is held by operation of the operation member 18. And the wire holding portions 11 and 12 of the respective wire holding portions of the holding member 10.
A pressing plate 14 is attached to the outer surface of the wire so as not to be displaced in the wire moving direction, and at least one wire holding portion 12 is attached.
An elastic body 15 that flexes when the wire is held is interposed between the holding plate 14 and the pressing plate 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 A carriage that travels in the rails on both sides of the drawing plate is connected by an endless wire so that it can move in the same direction and by the same amount. Regarding the ruler device.

[0002]

[Prior art]

 As a synchronizing means for translating the scales connected to the carriages that move in the rails arranged on both sides of the drawing board on the drawing board, the rollers provided at each end of the rails are endless. There is known a structure in which the wire is wound and the carriage is connected to the wire. When moving the scale in parallel with the parallel ruler concerned, once disconnecting the connection between one carriage and the wire, move the carriage, set the scale to the predetermined tilt state, and set the carriage and the wire again. It is done by connecting them. There is one in which the wire is held and held by a holding device provided on the carriage side. In this holding device, a mechanism is known in which a wire is directly held by a sheet metal.

When a wire formed by twisting a plurality of thin steel wires between the holding parts of the sheet metal is held, if the wire is too strong due to the difference in the force holding the wire, the wire is frayed, and when the wire is cut. There is. On the contrary, if the force is weak, the connection between the wire and the carriage is easily released, and the two carriages cannot be moved synchronously. In such a structure in which a wire is clamped by a rigid metal plate, it is necessary to assemble the two metal plates so that they have a predetermined size, but dimensional control for clamping a wire of about 0.6 mm is produced. In order to achieve this in assembly, it is necessary to use parts with high processing accuracy and careful assembly, which leads to increased costs and reduced productivity.

[0004]

[Problems to be solved by the device]

 Therefore, in a horizontal ruler device that uses an endless wire as a synchronous movement mechanism for the left and right carriages, it is easy to assemble, and the endless wire is securely connected to the carriage when being held. It is an object of the present invention to provide a parallel ruler device having a gripping member that can be held.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the parallel ruler device of the present invention is a parallel ruler device in which carriages are movably arranged in rails on both sides of a drawing board and an endless wire is used as a synchronous moving means of both carriages. In the carriage, an operation member for wire connection operation and a pair of holding members for holding the endless wire by operation of the operation member are arranged, and an outer surface of each wire holding portion of each holding member is provided. The holding plate is attached so as not to be displaced in the wire moving direction, and an elastic body that bends when the wire is held is interposed between at least one wire holding portion and the holding plate.

[0006]

【Example】

 In FIG. 1, rails 2 and 2 are arranged on both sides of the drawing board 1, and a pencil case 3 is arranged in the front. Carriage 4, 4 is movably arranged in the rails 2, 2, rollers 5, 5 are rotatably supported at the rear ends of the rails 2, 2 and rollers 6, 7 are provided at the front ends. 6 and 7 are rotatably supported in a superposed state and independently of each other. An endless wire 8 is wound around each of the rollers 5, 6, 7; 5, 6, 7. The carriages 4 and 4 traveling in the rails 2 and 2 and a part of the wire 8 are connected to each other, so that the carriages 4 and 4 can be synchronously moved by the same amount in the same direction. The scale 9 having both ends connected to the carriages 4 and 4 can be moved in parallel on the drawing board 1 by the synchronous moving means.

The carriages 4 and 4 are provided with a holding member 10 for disconnecting the wire 8 for synchronous movement. This holding member 10 will be described with reference to FIGS. 2 to 4. A part of the center of the carriage 4 is bent so that the first wire holding portion 11 is formed below the endless wire 8. A second wire holding portion 12 facing the first wire holding portion 11 via an endless wire 8 is provided at one end of a holding body 13 and the other end of the holding body 13 is rotatably pivotally attached to the carriage 4. Has been done. It should be noted that a spring (not shown) may urge the holding body 13 in a direction in which the wire holding portion 12 of the holding body 13 is normally separated from the endless wire 8.

A brass thin plate 14 as a holding plate is attached to the first wire holding portion 11 located below the endless wire 8. On the other hand, in the second wire holding portion 12 of the holding body 13 located above the endless wire 8, the urethane rubber 15 having a predetermined thickness as shown in FIG. 2 is arranged between the thin plate 14 made of brass. There is. The brass thin plates 14 and 14 are engaged so as to cover the endless wire 8 side surfaces of the wire holding portions 11 and 12, and are attached so as not to be displaced in the moving direction of the wire 8. In the embodiment, the urethane rubber 15 is provided only on the second wire holding portion 12, but it may be provided on the first wire holding portion 11.

A cam surface 17 of a cam member 16 whose one end is pivotally attached to the carriage 4 faces above the second wire holding portion 12 of the holding body 13. The other end of the cam member 16 is bifurcated. The operating member 18 is L-shaped, and an upright wall portion provided with a knob portion 19 is pivotally attached to a carriage 4 extending outside the rail 2, and an engaging portion 20 provided on a bottom wall portion is provided. The cam member 16 is engaged with the other end of the cam member 16.

On the other hand, regarding the traveling mechanism of the carriage 4, the rollers 21 and 21 are axially spaced apart from the lower part of the carriage 4, and the other end of the roller support member 23 is provided with the roller 22 at one end at the upper part. Is pivotally attached to the carriage 4, and a compression spring 26 is interposed between the central bent portion 24 of the roller support member 23 and the bent portion 25 of the carriage 4 corresponding to the central bent portion 24. 22 and 23 are brought into contact with the rail surface with an appropriate pressing force. The pressing plate may be made of a relatively soft metal other than the brass thin plate 14 of the embodiment, and an elastic body having a large spring constant may be used instead of the urethane rubber 15.

[0011]

[Action]

 Next, the operation will be described. FIG. 4 shows a state in which the endless wire 8 is held by the holding member 10. When the knob portion 19 of the operating member 18 is rotated counterclockwise in FIG. 4, the cam member 16 is also rotated counterclockwise, the cam surface 17 is separated from the second wire holding portion 12, and the carriage of the endless wire 8 is carried out. The connection with 4 is released. After moving the carriage 4 in the rail 2 by a predetermined amount in this state, the knob 19 is rotated clockwise in FIG. 4 in order to reconnect the carriage 4 and the endless wire 8. In particular, as shown in FIG. 2, the pressing force from the second wire holding portion 12 is applied to the brass thin plate 14 via the urethane rubber 15. Therefore, the wire 8 can be pressed through the urethane rubber 15 with a predetermined pressure, so that the wire 8 is held between the wire holding portions 11 and 12.

[0012]

[Effect of the device]

 As described above, when the endless wire 8 is tightened, an elastic body having a large spring constant is interposed even if there is some variation in the distance between the brass thin plates 14 and 14, so that a substantially uniform pressing force is applied. The wire 8 is clamped by. Therefore, the holding member can be easily assembled, and an appropriate pressing force can be obtained when the carriage 4 and the wire 8 are connected by the holding member.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of a parallel ruler device according to the present invention.

FIG. 2 is an explanatory view of holding a wire according to the present invention.

FIG. 3 is a side view of a carriage having a holding body of the present invention.

FIG. 4 is a front view of a carriage having a holding body of the present invention.

[Explanation of symbols]

 1 Drawing board 2 Rail 4 Carriage 8 Wire 10 Holding member 11 First wire holding portion 12 Second wire holding portion 14 Brass thin plate 15 Urethane rubber 18 Operating member

Claims (1)

[Scope of utility model registration request] 1. A parallel ruler device in which carriages 4 and 4 are movably arranged in rails 2 and 2 on both sides of a drawing board 1 and an endless wire 8 is used as a synchronous moving means for the carriages 4 and 4. In the carriage 4, an operation member 18 for wire connection operation and a holding member 10 for holding the endless wire 8 by the operation of the operation member 18 are arranged, and each wire holding portion 11 of the holding member 10 is arranged. A pressing plate 14 is attached to the outer surfaces of the pressing members 12 and 12 so as not to be displaced in the wire moving direction, and an elastic body 15 that is bent between at least one wire holding portion 12 and the pressing plate 14 when the wire is held is held.
A parallel ruler device characterized by interposing.