JPS60232396A - Winding pulley for wire rope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a wire rope hoisting pulley used, for example, in an optical traveling body of a copying machine, a printer head, or the like.

[Prior art]

FIGS. 1 and 2 show schematic configuration diagrams of a wire rope hoisting device. That is, pulleys 3 and 4 are provided on each of the shafts 1.2, wire ropes 5.6 are stretched around these pulleys 3 and 4, and the wire ropes 5.6 are connected to a traveling body supported by a linear guide shaft (not shown) at the intermediate part thereof using a clamp 7. do. The wire rope 5.6 is wound around one pulley 4 for half a circumference, and after wrapping both ends around the other pulley 3 an appropriate number of times, it is fixed. A pair of pulleys 3 are provided close to the shaft 1, and when the pulley 3 is rotated in the direction of the arrow by the motor 8, the wire rope 5 is wound up by the pulley 3, and the wire rope 5 is wound up by the rightward movement of the clamp 7. The running body moves to the right. If motor 8 still rotates in reverse, pulley 3
rotates in the direction of arrow R, the wire rope 6 is wound up, and as the clamp 7 moves to the left, the running body moves to the left.

By the way, in the above-mentioned conventional device, the wire rope 5.
6 tends to elongate and sag, so it is necessary to devise ways to always apply a constant tension to the wire rope. For example, as disclosed in Japanese Patent Application Laid-Open No. 57-151971, as shown in FIG. is provided on the shaft 1 via the one-sided clutch 9, and the shaft 1 and the one-sided clutch 9
The ends of the springs 10 are respectively locked to the pulleys 3 having the same shape, and the winding edges of the springs 10 are provided in the direction in which the pulleys 3 rotate. Therefore, the elongation and deflection of the wire rope 5 directly fixed to the pulley 3 having the one-way clutch 9 or the portion of the wire rope 5 close to the pulley 3 is absorbed by the action of the spring 10;
elongation of a portion of the wire rope far from the pulley or a portion of the wire rope close to the pulley 3 directly fixed to the shaft 1;
It has the disadvantage that it is difficult to absorb deflection, and even if it is possible, it takes time.

〔the purpose〕

The purpose of the present invention is to eliminate the drawbacks of the prior art described above, and to quickly absorb the elongation and slack of the wire rope even if the wire rope is long and has a large number of bobbins.
To provide a hoisting pulley for a wire rope which can always be fed at a minute rate by minimizing changes in the tensile force of the wire rope.

〔composition〕

Hereinafter, the configuration of the present invention will be explained based on examples.

The shaft 11 is rotatably supported by two bearings 12, one end is prevented from moving in the axial direction by a shaft stop ring 13, and the other end is connected to a drive source (not shown). . The first pulley 14 is connected to the shaft 11 via a first one-way clutch 15 in a leftward direction (
It is supported to be rotatable only in the two directions shown by the arrows below. A wire rope (hereinafter referred to as a wire) 16 is wound around the outer peripheral surface of the first pulley 14, and -Q'ftAf of the wire 16 is bent into the inside of the first pulley 14, and the wire end ball 17 is crimped. In particular, the wire 16 is fixed to the first pulley 14. The first fixing plate 18 is rotatably supported by the shaft 11, and is fixed to the shaft 11 by a set screw 19 after adjustment is completed. Pins 20 are driven into the first pulley 14 and the first fixing plate 18 so as to face each other, and the ends of the first winding spring 21 are respectively locked to these two pins 20. There is. By charging the first hoisting spring 21, the first pulley 14 is rotated to the left.

Further, a second pulley 23 is supported via a second one-way clutch 24 so as to be rotatable only in the right direction with respect to the shaft 11 with the partition plate 22 in between. The wire 16 is wound around the outer peripheral surface of the second pulley 23, and by bending one end of the wire 16 into the inside of the second pulley 23 and further caulking the wire end ball 17, the second pulley 23 of the wire 16 is The fixation is being removed. The second fixed plate 25 is the shaft 11
After adjustment is completed, it is fixed to the shaft 11 with a set screw 26. Pins 27 are driven into the second pulley 23 and the second fixing plate 25 so as to face each other, and a second upper spring 28 is attached to these two pins 27.
The ends of each are locked. By charging this second hoisting spring 28, the second pulley 23 is rotated to the right.

The partition plate 22 is provided to prevent the wire 16 wound around the outer circumferential surfaces of the first pulley 14 and the second pulley 23 from getting in.

The assembly process for the above embodiment is as follows.

That is, the wire 16 forming a wire loop (or wire train) is connected to the first pulley 14 and the second pulley 2.
3, the ends of the wire 16 are bent into the inside of each pulley 14, 23, and the wire end pole 17 is caulked to each end, and both ends are wrapped around the first pulley 1.
4 and the second pulley 23.

Then, loosen the setscrew 19 of the first fixing plate 18, rotate the first fixing plate 18 to the right, and move the first fixing plate 18, whose end is locked to the first pulley 14 and the pin 20 of the first fixing plate 18, to the right. After applying a constant biasing force to the first hoisting spring 21, the set screw 19 is applied to apply a predetermined torque to the first pulley 14. Further, a predetermined torque is applied to the second pulley 23 by rotating the second fixing plate 25 in the left direction and performing the same procedure for the first pulley 14.

Next, FIG. 4 shows a second embodiment. The same reference numerals as shown in FIG. 3 indicate members having the same function.

That is, the difference from the first embodiment described above is that the intermediate wheel 29 is provided in the inner cavity of the second pulley 23, and the intermediate wheel 29 is provided in the inner cavity of the second pulley 23. It is loosely fitted so that it can rotate freely. A disk-shaped plate portion 30 is formed on the intermediate wheel 29 and protrudes outward from the gap between the first pulley 14 and the second pulley 23, and functions as the partition plate 22 of the above-described embodiment. Further, a knurling or notch 31 is provided on the outer periphery of the plate portion 30.
There are separate locations.

A pin 20 is attached to the first pulley 14 and the intermediate wheel 29.
are driven in opposite directions, and the hoisting spring 32
are locked at both ends.

Therefore, in this embodiment, after the ends of the wire 16 are respectively locked to the first pulley 14 and the second pulley 23, the intermediate wheel 29 is rotated to the right, and both ends of the hoisting spring 32 are Lock it to the pin 20. After rotating the second pulley 23 to the right by a predetermined angle from this position, the set screw 2 of the second pulley 23
6, the intermediate wheel 29 is fixed to the second pulley 23, and a predetermined torque is applied between the first pulley 14 and the second pulley 23.

The notch 31 of the plate portion 30 of the intermediate wheel 29 facilitates rotation of the intermediate wheel 29 and serves as a mark for rotation of the intermediate wheel 29.

Therefore, in the second embodiment, the charging operation only needs to be performed once, whereas in the first embodiment, the charging operation is required twice. In contrast, in the second embodiment, a spring force is applied between the two pulleys, and no torque is applied to the shaft. For example, in the second embodiment, if slack occurs in the wire 16 of the first pulley 14, the first pulley 14 rotates to the left due to the elastic force of the spring 32 to take up the slack, and also tightens the shaft stop ring 13. This allows the shaft 11 to be removed, allowing the shaft 11 to be attached and detached even when the wire 16 is under tension (when in use).
There is C.

Issho, 1st. In the second embodiment, when the shaft 11 rotates to the left, the first pulley 1
4 to the left, the first pulley 14 acts as a hoisting pulley, and on the other hand, the wire 16 rotates the second pulley 23 to the left on the other side of the wire 16 wound up by the first pulley 14. .

Therefore, both the first pulley 14 and the second pulley 23 rotate at the same rotation speed. Also, when the shaft 11 rotates to the right,
The second pulley 23 functions as a hoisting pulley, and the first pulley 1
4 acts as a delivery pulley.

When the wire 16 stretches and slacks, it is automatically rotated by the biasing force of the spring of the pulley near the point where the stretch and slack occurs, absorbing the stretch and slack.

In addition, 1st. In the second embodiment, the shaft 11 was described as a drive shaft, but the invention can be implemented on an intermediate shaft such as the shaft 2 shown in FIG. 1.2.

Although the wire 16 has been described as a single wire, it may be a separate wire, and the present invention can be implemented as long as both ends of the wires constituting a closed loop are respectively locked to a pair of pulleys. .

〔effect〕

Since the present invention is configured as described above, even if the wire rope is a long wire rope, elongation and slack of the wire rope can be quickly absorbed, and the absorption is performed by winding the pulley, and this absorption process It is possible to provide a wire rope hoisting pulley which has the following effects: the direction of the wire rope does not change, the moving speed of the traveling body can be kept constant, and the absorption length can be increased.

[Brief explanation of the drawing]

1 and 2 are schematic configuration diagrams of a wire rope hoisting device, FIG. 3 is a sectional view of main parts showing a conventional example, FIG. 4 is a sectional view showing a first embodiment of the present invention, and FIG. 5 FIG. 2 is a sectional view showing a second embodiment. 11...Rotating shaft, 14...First pulley, 15°24...One-way clutch, 16...
...Wire rope, 23...Second pulley, 2
1.28.32 Spring, 29...
・Intermediate wheel. Figure 2 Figure 3

Claims (1)

[Scope of Claims] (1) A wire rope hoisting device that is locked to a traveling body that reciprocates along a guide shaft, and that is hooked onto a plurality of pulleys included in a drive pulley' to form a closed loop,
a rotary shaft rotatably supported; and a first rotary shaft rotatably supported in a first direction via a one-way clutch.
A second pulley is rotatably supported on the rotating shaft via a one-way clutch in a second direction opposite to the first direction, and one end of the wire rope is attached to the first pulley. A spring is provided for locking the wire rope, locking the other end of the wire rope forming a closed loop to a second pulley, and rotating the first pulley in a first direction and the second pulley in a second direction. A wire rope hoisting pulley characterized by: (2. In claim (1), the spring rotates the first pulley in a first direction with respect to the rotation axis, and the spring rotates the second pulley in a second direction with respect to the rotation axis. A wire rope hoisting pulley, characterized in that a spring for rotating the first pulley in the first direction is separately provided. A hoisting pulley for a wire rope, characterized in that two pulleys are rotated in a second direction. (4) In claim (3), one end of the spring is locked to the first pulley. A wire rope hoisting pulley characterized in that the other end of the wire rope is engaged with an intermediate wheel that is detachably attached to a second pulley.