JP2550293Y2 - Parallel ruler device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION A carriage which moves on rails provided on both sides of a drawing plate is connected by an endless wire, and a scale whose both ends are linked to the carriage is moved in parallel to perform drawing. Related to a ruler device.

[0002]

2. Description of the Related Art Synchronizing means for moving carriages movable on rails on both sides of a drawing plate in the same direction and by the same amount include connecting both carriages by endless wires, and connecting each carriage to a timing belt, Some carriages are synchronized by connecting a timing pulley at one end of a belt with a synchronous shaft.

In the former synchronous mechanism using an endless wire, a long wire is wound around rollers provided on each rail on both sides of the drawing plate, and the wire is stretched and fixed to a carriage. is there. In this case, since the wire fixing portion of the carriage is protruded to the side where the wire is stretched so that the wire can be easily fixed, the carriage provided with the wire fixing portion is attached to the rail of the roller when assembling the wire. Before installation, it was necessary to house the rail in the traveling path.

In the latter synchronous mechanism using a timing belt, a timing belt is wound around a timing pulley provided at at least one end of each rail, and a carriage is mounted on a part of the wound timing belt. Is fixed by a fixing device. For this reason, assembling can be performed for each rail, and the assembling work is easy.

Although there is almost no difference in use between the two synchronization mechanisms after the completion of the assembly, there is a great difference in the assemblability as described above. In particular, in the method using the endless wire as the synchronization means, it is necessary to wind the wire in a state where the carriage is previously arranged in the rail, which is one of the factors that deteriorates the assemblability.

[0006]

For this reason, the carriage is housed in the rail in advance, which is one of the factors that makes the assemblability of the parallel ruler device using an endless wire as a synchronization mechanism of the left and right carriages poor. An object of the present invention is to provide a parallel ruler device that can be assembled without performing a wire winding operation in a state.

[0007]

In order to solve the above-mentioned problems, a parallel ruler according to the present invention comprises rails 4a, 4b on both sides.
The traveling path 8 of the carriage 5 and the wire arranging path 7 are respectively arranged on the drawing board 3 and the rails 4a and 4b, on which the rails 4a and 4b are fixed.
An endless wire 2 is connected to the carriages 0, 18, 19, and 21 so that the carriages 5 and 5 can move in the same direction and the same amount. In the apparatus 1, a fixing device 10 for detachably fixing the endless wire 2 is provided on each carriage 5, and a roller on which the endless wire 2 is wound by a roller support device 22 at each end of the rails 4a, 4b. 16, 17 (18, 19), and the roller support device 22 is moved to the rail 4a ( 4b)
Is arranged so as to be rotatable in a plane parallel to the traveling path 8.

[0008]

In FIG. 2, reference numeral 1 denotes a parallel ruler, and rails 4a, 4a on both sides of a drawing plate 3 are provided by endless wires 2 of a synchronous mechanism.
The carriages 5 and 5 can move in the same direction and the same amount in 4b. Both ends of the scale 6 are linked to the carriages 5 and 5.

As shown in FIG. 1, a wire arrangement path 7 and a traveling path 8 for the carriage 5 are formed in the rail 4a. On one side of the carriage 5 traveling on the traveling path 8,
Two traveling rollers 9, 9 are pivotally supported at a distance, and a fixing device 10 for fixing the endless wire 2 is provided between the two traveling rollers 9, 9. The fixing device 10 includes a receiving member 11 and a pressing member 12 fixed to the carriage 5, and the receiving member 11 and the pressing member 12 are screwed through the pressing member 12 and screwed to the center of the receiving member 11. This is for fixing the wires 2 running between them. The operation of the screw 13 is performed by the operation of a driver or the like inserted through a hole 14 provided at a position corresponding to the fixing device 10 of the carriage 5. The fixing device 10 has advanced beyond the traveling rollers 9 and 9 toward the wire arrangement path 7.

The rail 4 on which the pencil case 15 is arranged
Rollers 1 for winding two endless wires at one end of a and 4b
6, 17 and rollers 18, 19 are provided. or,
Rollers 20, 21 are provided at the other end. The rollers 16, 17 and the rollers 18, 19 are superposed on each other and supported by roller supporting plates 22, 22, which are roller supporting devices, and the rollers 20, 21 are directly supported by rails 4a, 4b.

One end of the roller support plate 22 is rotatably mounted on the rail 4a (4b) by a shaft 23, and the other end is positioned at an appropriate position of an arc-shaped hole 24 formed in the lower rail 4a (4b). Can be fixed by screws 25.

The fixing device 10 includes the receiving member 11 as described above.
And a pressing member 12. The center of the receiving member 11 is swelled and has sliding engagement portions 26, 26 of the pressing member 12, and both ends are attached to the carriage 5 by hollow rivets 27, 27. Fixed. The pressing member 12 is the receiving member 1
1 has concave portions 28, 28 on both sides thereof for engaging with the sliding engaging portions 26, 26, respectively.
1 and moves toward and away from the corresponding surface.

The screw hole 2 at the end provided in the carriage 5
9, a shaft 33 is screwed through a hole 32 formed in the end of the arm portion 31 of the scale holding plate 30, and the scale holding plate 30 is pivotally attached to the drawing surface so as to be able to move up and down. I have. On the upper surface of the scale holding portion 34 of the scale holding plate 30, a shaft 35 is implanted perpendicularly to the drawing board 3, and holes 36, 36 at both ends of the scale 6 are inserted into the shaft 35, and the decorative nut 3 is inserted.
The scale 6 is moved by the scale holders 34, 34
Fixed to

The center of the coil of the torsion coil spring 38 is inserted between the arm 31 of the pivot shaft 33 inserted into the arm 31 of the scale holding plate 30 and the carriage 5 and one end whose tip is bent 180 °. 39 is in contact with the lower surface of the scale holding portion 34, and the other end of the bent portion 40 is engaged with the hollow hole 41 of the hollow rivet 27 that fixes the receiving member 11 of the fixing device 10 to the carriage 5.

The locking structure of the torsion coil spring 38 will be described in detail.
Although it was necessary to separately provide a locking means for locking the end of the coil spring 8, the end of the coil spring 38 can insert the rivet 27 for fixing the fixing device 10 of the endless wire 2 to the carriage 5. The hollow shape allows the rivet 27 to be used both for fixing the fixing device 10 and for locking one end of the coil spring 38, so that it is not necessary to provide a new locking means.

Also, the drawing plate fixing portion 4 is provided on the rail 4a (4b).
The fixing portion 42 is provided with long holes 43, 43,... For fixing the pencil case 15 and the drawing board 3 at appropriate positions.
The pencil case 15 and the drawing board 3 are fixed to the rails 4a (4b) by 5, 45.

In the present embodiment, the operation of the pressing member 12 in the fixing device 10 for the carriage 5 is performed by using a screw 13 or the like through a central hole 14 of the carriage 5 and externally using a suitable rotary tool such as a driver. However, an L-shape including a handle portion in which the shaft portion of the screw 13 is elongated so as to extend outward from the center hole 14 of the carriage 5 and further bent so as not to contact the arm portion 31 of the scale holding plate 30. With this configuration, the endless wire 2 can be released from the carriage 5 by rotating the handle.

Thus, the one carriage 5 can be moved independently of the endless wire 2 by rotating the L-shaped member. After the movement, the carriage 5 is fixed to the endless wire 2 again, and the left and right carriages 5, 5 are linked. By doing so, the scale 6 connected to the carriage 5 via the scale holding plate 30 can be inclined at an arbitrary angle, and can be used as a scale inclining device. However, in this case, a scale length adjusting mechanism such as making the hole 36 at one end of the scale 6 a long hole is added to absorb the displacement between the left and right carriages 5 and 5 generated when the scale 6 is tilted. Will be.

Next, the operation state will be described. The endless wire 2 is wound without the carriage 5 being inserted into the running surface 8 of the rail 4a. The endless wire 2 is wound around the roller 16 on the side of the pencil case 15 of the rail 4a, and then the roller 20, the roller 17, the roller 18, the roller 2
1. It is hung on the roller 19 and reaches the roller 16 again to be stretched endlessly.

When the carriage 5 is inserted into the running surface 8 of the rail 4a, the fixing device 1 for the endless wire 2 of the carriage 5 is used.
The direction in which the roller supporting plate 22 is retracted from the running surface 8 of the rail 4a (centering on the shaft 23 in FIG. Clockwise). As a result, the rollers 16 and 17 rotate from the running surface 8 to the state shown by the dotted line, and retreat from the running surface 8, so that the carriage 5 easily attaches the endless wire 2 fixing device 10 to the running surface 8 of the rail 4a. Can be inserted. After insertion, roller support plate 2
2 can be rotated counterclockwise in FIG. 3 to return to the original state, and the screw 25 can be tightened to complete the assembly.

The rotation of the roller support plate 22 causes the distance between the rollers 16 and 17 and the roller 20 and the distance between the rollers 16 and 17.
The endless wire 2 can be set to a predetermined tension because the distance between the endless wire 2 and the rollers 18 and 19 can be changed. The endless wire 2 is disposed between the receiving member 11 and the pressing member 12 when the carriage 5 is inserted, or is received by operating the endless wire 2 from the rail end on the pencil scale 15 after the carriage 5 is inserted. The endless wire 2 is fixed to the carriage 5 by being moved between the member 11 and the pressing member 12 and then operating the screw 13 of the pressing portion 12. Instead of the above structure, the rollers 20, 21 may be supported by the roller support plates 22, 22, respectively, and the rollers 20, 21 may be rotated with respect to the rails 4a, 4b.

[0022]

The roller on which the endless wire is stretched has advanced to the rail on the travel path side of the rail, so that the carriage cannot be inserted into the travel path after the wire is stretched. And the support plate is made rotatable on the rail, so that the support plate is rotated after the wire is stretched to such an extent that the carriage can be inserted into the traveling path. As a result, a space in which the carriage can be inserted can be secured on the traveling path, and the carriage can be assembled even after the wire is stretched, and the distance between the rollers can be changed at the same time, so that the tension of the wire can be adjusted.

[0023]

As described above, the carriage can be inserted into the traveling path by retracting the roller from the traveling path of the rail after winding the wire. For this reason, the endless wire can be wound around without the carriage on the rail traveling path, and the winding of the wire around the roller is facilitated, so that the assembling property can be improved. Further, since the support plate of the roller around which the wire is wound is rotatable with respect to the rail, the tension of the wire can be adjusted by the displacement of the roller due to the rotation of the support plate.

[0024]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a parallel ruler device according to the present invention.

FIG. 2 is an overall explanatory view of the parallel ruler device according to the present invention.

FIG. 3 shows an operation state diagram of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Parallel ruler apparatus 2 Endless wire 3 Drawing board 4a, 4b Rail 5 Carriage 6 Scale 7 Wire arrangement path 8 Running path 10 Fixing device 16, 17 Roller 22 Roller support plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A drawing board 3 having rails 4a and 4b fixed on both sides, and a running path 8 of a carriage 5 and a wire arranging path 7 are arranged on both rails 4a and 4b. Rollers 16, 17, 20, 18, 19, 2 provided
An endless wire 2 is connected to the carriage 5 so that the carriages 5 and 5 can move in the same direction and the same amount, and a scale 6 is connected to the carriages 5 and 5 in an interlocking manner. A fixing device 10 for detachably fixing the wire 2 is provided on each carriage 5, and the rollers 16 and 17 (18, 18) around which the endless wire 2 is wound by the roller support device 22 at each end of the rails 4a and 4b. 19), and the rollers 16, 17 (18, 19) are mounted on at least the rail 4a.
A parallel ruler device wherein the roller support device 22 is rotatably arranged in a plane parallel to the travel path 8 of the rail 4a (4b) so as to be able to advance and retreat with respect to the travel path 8 of (4b). .