JPH03268977A - Run drive mechanism - Google Patents

Abstract

PURPOSE:To improve ease of operation in wire winding and tension adjustment by first winding wire around the peripheral surface preliminarily, then winding the wire around the peripheral surface securely by rotation of a ring to a main pulley structure and fixing the ring to the main pulley structure. CONSTITUTION:One end of wire 6 is hooked to the engagement part 2a of a main pulley structure using a pole 7, then the wire is wound preliminarily around the peripheral surface 2d for winding of the main pulley structure. After that, the other end of the wire is hooked to the engagement part 3a of a ring 3 through the pole 7. Next, a drive pulley 1 is fixed to the shaft of a motor 12 and at the same time, the wire 6 is wound around each intermediate pulley 13. Further, a recording head 10 which is guided in a straight run by two guide rails 11, is provided at a specified point of wire 6 between intermediate pulleys 13. Then, the ring 3 is rotated against the main pulley structure to allow the wire to be securely wound around the peripheral surface for winding 2d for tension adjustment. Later, the ring 3 is fixed to the main pulley structure using a set screw 4.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a mechanism for driving a recording head to travel via a wire wound between a head that is guided so as to be able to travel, such as a recording head, and a drive pulley fixed to a motor side. The present invention relates to a traveling drive mechanism that improves the workability of winding and tension adjustment.

[Conventional technology]

One conventional example will be described below with reference to the drawings. FIG. 7 is an overall plan view of a conventional example. In FIG. 7, the upper left and right intermediate pulleys 13 and the drive pulley 2
A wire 6 is wound between each intermediate boot 1 and 13.
In between, a recording head (not shown) is attached. In addition, a tension pulley 23 is used to adjust the tension of the entire wire 6.
is provided so that its position can be adjusted. As shown in FIG. 5, which is a perspective view thereof, the drive boob 921 is a cylindrical member having a hole in the center through which the motor shaft fits. This driving pulley 21 is provided with groove-shaped hooking portions 21a and 21b for hooking each end of the wire 6 (see FIG. 7) at both diametrical ends of its upper portion. An outer circumferential surface 21d for wire winding is provided at the lower part, and a screw hole 21c for fixing to the motor shaft is provided at the lower end. - The wire wrapping in the conventional example is as follows. As shown in the sectional view of FIG. 6, after the latching balls 7 fixed to each end of the wire 6 are fitted into the respective latching parts 21a and 21b and latched, the wire 6 is As many times as
It is wound around the outer peripheral surface 21d of the drive pulley 21. With this preliminary wire winding performed, the wire 6 is wound between each intermediate pulley 13 as shown in FIG. In this winding state, the wire 6 has some slack, so the position of the tension pulley 23 is finally adjusted to remove this slack and adjust the tension to an appropriate value. FIG. 8 is a perspective view of another conventional example of a driving pulley in which the wire is preliminarily wound. In this other conventional example, one end of the wire 6 is hooked to a hook 31a formed in the upper end of the drive pulley 31, and the wire 6 is wound around the outer circumferential surface (not marked with a reference number) an appropriate number of times. Later, the other end passes through the temporary hooking part 31b located slightly below the center,
It is pulled out to the bottom. After the length of the wire 6 is adjusted by adjusting the length of the wire 6, the wire 6 is fixed to the drive pulley 31 with a fixing fitting 32 and a machine screw 33. Note that 31e is a screw hole for a machine screw 33, and 31c is a screw hole for fixing the drive pulley 31 to a motor shaft (not shown).

[Problem B that the invention attempts to solve]

As explained above, in the conventional example, as shown in FIG. I just can't afford it. Therefore, the preliminary wire winding shown in FIG. 6 does not have sufficient margin for the length of the subsequent wire 6, making winding work difficult. Furthermore, it is necessary to finally adjust the tension of the wire 6 by adjusting the position of the tension cover IJ23. In another conventional example, since the tension can be adjusted by adjusting the amount of pulling out of the wire 6 in FIG. 8, the workability is improved compared to the conventional example. However, with regard to wire winding, as in the conventional example, the preliminary wire winding does not have sufficient margin for the length of the subsequent wire 6, so the workability is still poor. An object of the present invention is to provide a travel drive mechanism that solves the problems of the conventional technology and improves the workability of wire winding and tension adjustment.

[Means for Solving the Problem 1] In order to solve this problem, a travel drive mechanism according to the present invention includes a head that is movably guided, such as a recording head,
In a mechanism for driving the head to travel via a wire wound around a drive pulley fixed to a motor side, the drive pulley has a hook for one end of the wire and a wire around which the wire is wound. a pulley body having an outer circumferential surface and fixed to the shaft on the motor side; a hooking part for the other end of the wire that is rotatably fitted coaxially to the pulley body; a ring having a set screw for fixing the wire to the pulley body; the wire is preliminarily wound around the outer peripheral surface after one end thereof is hooked to the hook portion of the pulley body; After passing through the head, the other end is hooked to the hook portion of the ring, and by rotation of this ring relative to the pulley body, it is fully wound around the outer circumferential surface and the tension is adjusted. Later, the ring is fixed to the pulley body by the set screw. [Function] After the wire is hooked at one end to the hook on the pulley body, it is preliminarily wound around the outer peripheral surface of the pulley body, and after passing through the head, the other end is hooked to the ring. It is hung on the part. Then, after the wire is fully wound around the outer circumferential surface of the ring and the tension is adjusted by rotation of the ring relative to the pulley body, the ring is fixed to the pulley body by means of a set screw.

【Example】

Embodiments of the travel drive mechanism according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a drive pulley 1 in this embodiment, and FIG. 2 is a sectional view thereof. In FIGS. 1 and 2, a drive pulley 1 mainly consists of a pulley body 2 and a ring 3. As shown in FIGS. The pulley body 2 is a three-stage cylindrical member, and has a hole in the center into which the motor shaft is fitted, and a screw hole 2c for fixing to the motor shaft. The first stage is provided with a groove-shaped hooking part 2a for one end of the wire, the second stage is the outer peripheral surface 2d for wire winding, and the third stage is a ring 3 rotatably fitted. The retaining ring 5 is used for positioning in the axial direction. The ring 3 is provided with a groove-shaped hooking portion 3a cut into one end face to form an inverted letter shape, and a screw hole 3c for a set screw 4 is bored in the peripheral wall. The wire wrapping in this example is shown in Figures 3 and 4.
This will be explained with reference to the figures. FIG. 3 is a perspective view of the drive pulley in a state where the wire is preliminarily wound, and FIG. 4 is an overall perspective view of the embodiment. In FIG. 3, one end of the wire 6 is connected to a hooking portion of the pulley body 2 by a ball 7 fixed thereto.
After being hooked to a, the pulley body 2 is wrapped around the outer peripheral surface 2.
d, and the other end is hooked to the hook 3a of the ring 3 via the ball 7. Next, as shown in FIG.
The wire 6 is fixed to the shaft of each intermediate pulley 1.
A recording head 10, which is guided by two guide rails 11 so as to be able to travel in a straight line, is fixed at a predetermined location of the wire 6 between each intermediate boot 3. Then the wire 6 connects the ring 3 in FIG. 3 to its screw hole 3c.
By inserting a hexagon socket wrench into the pulley (see FIG. 2) and rotating it relative to the pulley body 2, the winding is fully wound around the outer circumferential surface 2d and the tension is adjusted. After that, the ring 3 is attached to the pulley body 2 by the set screw 4.
Fixed to . Note that tension adjustment will be more accurate if a tension measuring gauge is used instead of a wrench.

【Effect of the invention】

As explained above, in this invention, the wire is
After its one end is hooked to the hook of the pulley body, it is preliminarily wrapped around the outer peripheral surface of the pulley body, and after passing through the head, the other end is hooked to the hook of the ring. Then, by rotating the ring relative to the pulley body, the ring is fully wrapped around the outer circumferential surface and the tension is adjusted.
A set screw secures the ring to the pulley body. Therefore, the present invention has the following superior effects compared to the prior art. (11 Preliminary winding of the wire around the pulley body allows sufficient wire length for subsequent winding, and after this winding is completed, the ring is rotated relative to the pulley body, so that the wire is wrapped around the pulley body.) Because the full-fledged winding and tension adjustment are performed, the workability of winding the wire and adjusting the tension is very good. (2) In particular, according to the embodiment, By using a tension measuring gauge instead of a wrench when rotating relative to the main body, tension adjustment can be made more accurately. (3) An intermediate pulley for tension adjustment is no longer required, resulting in space savings. This enables cost reduction.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a drive pulley according to an embodiment of the present invention, FIG. 2 is a sectional view thereof, FIG. 3 is a perspective view of the drive pulley in a state where the wire is pre-wound, and FIG. 4 5 is a perspective view of a drive pulley in a conventional example, FIG. 6 is a perspective view of the drive pulley in a state where the wire is pre-wound, and FIG. An overall plan view of the conventional example. FIG. 8 is a perspective view of another conventional example in which the wire of the driving pulley is preliminarily wound. Symbol explanation 1: Drive pulley, 2: Pulley main body, 2a, 3a: Latching part, 2d: Winding is on outer peripheral surface, 3
: Ring, 4: Set screw, 5: Retaining ring, 6: Wire, 7
: Ball, 10: Recording head, 11: Guide rail, 12
: Motor, 13: Intermediate pulley. Horse 4th Chapter 32 Atsushi 7th Chapter 8

Claims (1)

[Claims] 1) In a mechanism for driving the head to travel via a wire wound between a head that is guided so that it can travel and a drive pulley that is fixed to the motor side, the drive pulley is connected to one of the wires. a pulley body having an end hooking part and an outer circumferential surface around which the wire is wound, and fixed to the shaft on the motor side; a ring having a hook for the other end of the wire and a set screw for fixing to the pulley body; the wire has one end hooked to the hook of the pulley body; After passing through the head, the other end is hooked to the hooking part of the ring, and as the ring rotates with respect to the pulley body, it is preliminarily wrapped around the outer circumferential surface. A travel drive mechanism characterized in that the ring is fixed to the pulley body by the set screw after the ring is fully wound and the tension is adjusted.