JPS6328221Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a clutch in a rotary dobby machine.

BACKGROUND OF THE INVENTION Various rotary dobby machines have been proposed because they are capable of controlling shedding at several times the speed of double-acting dobby machines, but they have not yet been able to operate at sufficiently high speeds.

The reason for this is the complexity of the clutch device between the drive shaft and the jack lever, and the short time it takes to time the clutch engagement/disengagement commands.In order to reliably engage/disengage the clutch, the rotation speed must be set to a certain level. Ta.

The clutch of a rotating dobby machine is turned on and off by inserting or removing a wedge member between the input shaft and an eccentric plate that is slidably fitted on the jack lever (Japanese Patent Application Laid-Open No. 56-73136). As shown in Figure A, when the wedge member b is engaged with the groove a provided on the eccentric plate or the input shaft, if the groove a and the wedge member b have a rectangular cross section, the wedge member b is attached to the groove a. The timing for inserting the engine was very precise, and when the engine was rotating at high speed, it was extremely difficult to do so and the rotation had to be slowed down.

Problems to be solved by the invention This invention inserts a wedge member into the groove provided in the input side member and the driven side member, and when trying to fix the driven member and the input side member, the wedge member is inserted into the groove provided in the input side member and the driven side member. To improve the fact that the timing at which the wedge member can be inserted into the groove is extremely short, and to lengthen the time at which the wedge member can be inserted into the groove.

Means for Solving the Problems In the present invention, as shown in FIG. 3B, the groove provided in either the driving member or the driven member consisting of the input shaft and the eccentric plate is semicircular, and the wedge member are configured in a circular shape, and the wedge member can be inserted into the groove when the center line L of the wedge member is located between the first half R of the semicircular radius constituting the groove, and the wedge member can be inserted into the groove. The time period has been lengthened to withstand high-speed driving.

Embodiment 1 is an input shaft that is constantly rotated by receiving power from a drive source (not shown). A rotating disk 2 is provided integrally with the input shaft 1. An annular recess 3 is provided on the upper surface of the rotating disk 2, and an annular spring 4 is fitted inside. Rotating disk 2
is slidably fitted onto the upper surface of the eccentric sleeve 6 which is slidably fitted to the fixed guide 5. Eccentric sleeve 6
has the shape of two discs stacked one on top of the other with their centers shifted, and the upper disc fits into a fixed guide 5 to be able to slide and rotate, and a rotating disc 2 is placed on its top surface. are slidably fitted. The lower disc is fitted into a circular hole provided at one end of the jack lever 7. On the outer periphery of rotating disk 2
A pair of semicircular grooves 8, 9 are provided with an offset of 180°, and the eccentric sleeve 6 has the semicircular notches 8, 9.
Provide guide grooves 10 and 11 with a width equal to the diameter of 9,
Following the guide grooves 10 and 11, the fixed guide 5 is also provided with guide grooves 12 and 13. A disc-shaped wedge body 14 having the same diameter as the semicircular grooves 8 and 9 is inserted into these guide grooves. 15 and 16 are guide grooves 1
The operating keys 2 and 13 are slidably fitted in the guide grooves 12 and 13, respectively, and can be slid in the guide grooves 12 and 13 by means not shown. The operation key 16 is pushed into or pulled out of the guide groove 13 as appropriate by electrical means or the like depending on the structure of the fabric to be woven. 17 is a support member for the fixed guide. The tip of the jack lever 7 is pivotally supported on a swinging arm 18, and a wire 19 for pulling a heald frame (not shown) is fixed to the swinging arm 18. 20 is a support shaft of the swinging arm 18.

Suppose now that the input shaft 1 is rotating in the state shown in FIG. The rotation of the input shaft 1 is transmitted to the rotating disk 2, and the rotating disk 2 also rotates, but since the operating key 16 is pushed into the guide groove 13, the operating key 1
6, the wedge body 14 is fitted into the semicircular groove 9 of the rotary disk 2 against the elastic force of the spring 4. For this purpose, the eccentric sleeve 6 is attached to the rotating disk 2.
They cannot rotate against each other, and both rotate at the same time. As the eccentric sleeve 6 rotates, the jack lever 7, which is fitted into the eccentric sleeve 6, moves to the left in FIG. Pull the heald frame to rise. If you want to hold the heald frame in an elevated position, press the operation key 1 when the input shaft 1 has rotated half a turn, that is, when the wedge body 14 has rotated 180 degrees.
If you pull 5, wedge 1 will be at the position of operation key 15.
4 was pulled out of the semicircular groove 9 by the elastic force of the spring 4, retreated to the position shown by the chain line in FIG. Stop in this state.

When trying to move the jack lever to the right,
The rotating disk 2 rotates together with the input shaft 1, and the semicircular groove 8
When the wedge body 14 is about to face the guide groove 10, that is, the wedge body 14 is in the position shown by the chain line in the guide grooves 10 and 12.
If the operation key 15 is inserted into the guide groove 12 when the center of the wedge body 14 faces the front half of the semicircular groove 8, the wedge body 14
easily fits into the semicircular groove 8, and the rotating disk 2 and the eccentric sleeve 6 become fixed. Note that although the illustrated wedge body 14 has a circular shape, it goes without saying that it may also have an oval shape.

Effect Because the device of this invention is constructed as described above, the time during which the wedge can be inserted between the rotating disk, which is the driving member, and the eccentric sleeve, which is the driven member, can be any time while the center line of the wedge faces the front half of the semicircular groove of the rotating disk, so the time during which the wedge can be inserted is longer, and therefore the rotation speed of the input shaft can be increased.

[Brief explanation of the drawing]

FIG. 1 is a front view of the device of the present invention, FIG. 2 is a sectional view taken along the line of FIG. This is a drawing similar to FIG. 3A. 1... Input shaft, 2... Rotating disk, 6... Eccentric sleeve, 8, 9... Semicircular groove, 14... Wedge body.

Claims (1)

[Scope of utility model registration request] A rotating disc integrated with the input shaft, which is a driving member, and an eccentric sleeve, which is a driven member, into which a jack lever is slidably fitted, are stacked on top of each other, and a pair of halves are formed by deviating 180° from the outer periphery of the rotating disc. A circular groove is provided,
A clutch for a rotary dobby machine, in which an eccentric sleeve is provided with a groove having a width equal to the diameter of the semicircular groove connected to the semicircular groove, and a disc-shaped wedge is inserted into the groove.