JPS6332138Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a backlash adjustment device for a change gear in a spinning machine.

Prior Art In spinning machines such as roving frames and ring spinning frames, the rotation of the driving shaft is transmitted to various mechanisms such as the draft part through rotation transmission means such as gear trains and timing belts. It is necessary to replace the built-in chain gears such as twist chain gears and draft chain gears with ones that meet the spinning conditions.

The change gear is generally attached to a lever bracket that is rotatably arranged, and when replacing the change gear, it is necessary to adjust the change gear so that the correct cross-clasp is maintained between the change gear and the constant gear. Conventionally, the cross-clasp was adjusted by the worker visually tapping the lever bracket with a hammer or the like to move it, and then tightening the fixing bolt at the optimal position to fix it, which made the cross-clasp adjustment work troublesome. In particular, when the gear meshing could not be directly observed, the worker had to rely on his or her intuition and skilled work was required. In addition, in recent years, spinning factories have been required to produce a wide variety of products in small lots, and as a result, spinning conditions are frequently changed, and the frequency of change gear replacement work has increased. Furthermore, in recent years, there has been a trend toward multiple spindles in spinning machines in order to reduce manufacturing and operating costs per spindle and reduce the space required. In addition, because the bottom roller becomes longer with the increase in the number of spindles, a gear mechanism symmetrical to the gear end side is generally provided on the outside end to reduce the overload on the bottom roller. However, since the pneumatic device, the machine control circuit box, or the drive mechanism for the all spindles simultaneous doffing device is provided on the outside end, it becomes difficult to directly observe the meshing state between the change gear and the constant gear, and the above-mentioned inconvenience when replacing the change gear becomes more noticeable.

Purpose This invention was made in order to solve the above-mentioned conventional problems, and its purpose is to easily adjust the backlash between the change gear and the constant gear to an appropriate value without relying on the operator's visual inspection or intuition. To provide a backlash adjustment device for a change gear in a spinning machine, which can easily obtain a proper backlash even in a part where the meshing of the gears cannot be seen directly.

Structure of the invention In order to achieve the above-mentioned object, in this invention, a lever bracket supporting a chain gear is arranged so as to be rotatable and fixable at an appropriate position, and an adjustment gear is provided on one side of the lever bracket on the side of the gear meshing with the chain gear. The stop piece is movably disposed, and an adjustment bolt whose tip abuts against the regulating surface of the other is screwed into either the lever bracket or the adjustment piece.

Embodiment Hereinafter, an embodiment of a spinning machine in which a gear transmission mechanism to each bottom roller drive shaft is provided on both sides of the machine frame will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, a newer unit 2 and a machine control circuit box 3 are disposed outside the gear box 1a on the out-end side. Inside the gear box 1a, the rotation of the driving shaft 4 is transmitted through a driving gear 5 fitted to the driving shaft 4, a twist constant gear 6, and a twist chain gear 7, to a front bottom roller 8, a middle bottom roller 9, and a back bottom roller 10. A gear mechanism G1 is disposed for transmitting the signal to the transmission line. Further, a gear mechanism G2 for transmitting the rotation of the front bottom roller 8 to the middle bottom roller 9 and the back bottom roller 10 is disposed in the gear box 1b on the gear end side symmetrically with the gear mechanism G1. Double gear mechanism G
1, G2 has change gears 11a and 11b for changing the rotational speed ratio between the back bottom roller 10 and the middle bottom roller 9, which provide a preparation draft.
and a back bottom roller 10 that provides the main draft.
Change gears 12a and 12b for changing the rotational speed ratio between the front bottom roller 8 and the front bottom roller 8 are provided.

Next, a change gear 12a disposed on the out-end side for changing the rotational speed ratio between the back bottom roller 10 and the front bottom roller 8, which provides the main draft, will be explained as an example. A rotating shaft 18 fitted with a change gear 12a meshing with a constant gear 14 fitted on a rotating shaft 13 and a constant gear 17 meshing with a constant gear 16 rotatably supported on a support shaft 15 is rotatable. The supporting lever bracket 19 is attached to the support shaft 15.
It is rotatably supported. The lever bracket 19 can be fixed at an appropriate position by a fixing bolt 21 and a nut 22 which are inserted into the lever bracket 19 through an arc-shaped guide hole 20 provided transparently in the frame. On one side of the lever bracket 19, on the side of the constant gear 14 that meshes with the change gear 12a, an adjustment piece 23 passes through the guide hole 20 and is inserted along the guide hole 20 by a bolt 24 and a nut 25 that are inserted into the adjustment piece 23. It is arranged so that it can be moved. Fourth
As shown in the figure, the adjuster piece 23 is provided with a protrusion 26 that engages with the guide hole 20, and the tip thereof is perpendicular to the bolt 24 on the side surface of the lever bracket 19 serving as a regulating surface. An adjusting bolt mounting portion 28 is formed into which the adjusting bolt 27 that comes into contact is screwed. Third
As shown in the figure, a reference line 29 is marked on the head of the adjusting bolt 27, and a scale 30 indicating the amount of rotation of the adjusting bolt 27 is provided on the adjusting bolt mounting portion 28.

Next, the operation of the apparatus configured as described above will be explained. When replacing the chain gear, change the chain gear to 12.
After attaching the lever bracket 19 to the lever bracket 19, the lever bracket 19 is rotated to a position where the backlash between the constant gear 14 meshing with the change gear 12a is zero, and the fixing bolt 21 is temporarily tightened at that position. Next, the adjusting piece 23 is fixed at a position where the tip of the adjusting bolt 27 contacts the side surface of the lever bracket 19. Then, when the adjuster bolt 27 is rotated by a certain angle in this state, the lever bracket 19 is rotated by the adjuster bolt 2.
7 and rotated by a certain angle in the direction away from the constant gear 14 (counterclockwise in FIG. 2). As a result, the change gear 12a attached to the lever bracket 19 is also rotated in the same direction about the support shaft 15, and the backlash with the constant gear 14 is adjusted to an appropriate value. Finally, the fixing bolt 21 is firmly tightened to complete the work. That is, since the adjustment of the balance is reliably performed by rotating the adjuster bolt 27 by a certain angle, it is possible to obtain the appropriate balance without requiring intuition or skill even when adjusting parts where the meshing of the gears cannot be seen directly. can.

Note that this invention is not limited to the above-described embodiment; for example, instead of attaching the adjusting bolt 27 to the adjusting piece 23 as shown in FIG. The adjusting bolt 27 may be attached thereto, and a regulating portion 31 having a regulating surface against which the tip of the adjusting bolt 27 comes into contact may be provided protruding from the adjusting piece 23 side.
Also, instead of the protrusion 26 for maintaining the posture of the adjuster piece 23, as shown in FIG.
In addition to bolt hole 24' for bolt 4, another bolt hole 3 for bolt 32 is provided at a position corresponding to protrusion 26.
2' may be provided, and the posture of the adjuster piece 23 may be maintained by both bolts 24, 32.

Effects As detailed above, according to this invention, by rotating the adjuster bolt at a certain angle, it is possible to always maintain a constant consistency without relying on the intuition of the operator, and it is also possible to directly observe the meshing of the gears. This has the excellent effect of being able to obtain appropriate backlash even in areas where this is not possible.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the drive transmission mechanism to the draft roller, Fig. 2 is a front view of main parts, Fig. 3 is an enlarged sectional view taken along line A-A in Fig. 2, and Fig. 4 is a perspective view of the adjuster piece. Figure 5 is a front view of main parts showing a modification example,
FIG. 6 is a perspective view showing another modification of the adjuster piece. Chain gears 11a, 11b, 12a, 12
b, rotating shafts 13, 18, constant gear 14,
Support shaft 15, lever bracket 19, adjustment piece 23, adjustment bolt 27, reference line 29,
Scale 30.

Claims (1)

[Claims for Utility Model Registration] 1. A lever bracket supporting a chain gear is arranged so as to be rotatable and fixable at an appropriate position, and an adjustment piece is movable on one side of the lever bracket to the gear side that meshes with the chain gear. 1. A backlash adjustment device for a change gear in a spinning machine, characterized in that an adjustment bolt is screwed onto either the lever bracket or the adjustment piece, the tip of which abuts on the other regulating surface. 2 A reference line is marked on the head of the adjusting bolt, and a scale indicating the amount of rotation of the adjusting bolt is provided on the threaded portion of the adjusting bolt, as set forth in claim 1 of the utility model registration claim. Breadth adjustment device for change gears in spinning machines.