JPS6324148Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a weft beating micro-tremor absorbing device for a loom.

As is well known, the basic operations of weaving are: (a) First, the warp threads of the two groups of threads to be combined are
The warp threads are stretched on the loom in parallel rows, and the rows of warp threads are further divided into two groups according to the fabric structure to be woven, and the opening is opened between them (shedding). Insert the second set of weft yarns one by one into the weft opening (weft insertion); (c) Press the inserted weft yarns against the already inserted weft yarns and bring them close together to ensure interlacing of warp and weft to create a woven fabric. (weft beating), (d) winding up the length of one weft thread into the fabric every moment (winding up), (e) winding the warp threads in order to supply a new warp in response to the winding. This is carried out by repeating the following five operations: sending (sending).

However, in order to improve weaving efficiency, modern high-speed automatic looms are equipped with continuous feed devices and continuous winding devices that exhibit excellent performance even in high-speed operation. A continuously variable transmission is used to finely adjust the delivery amount so that the appropriate tension is applied.

In other words, in such conventional technology, during the weaving process, the power extracted from the loom body is changed in speed by a continuously variable transmission, then decelerated by a worm gear, and then transmitted to the delivery beam via a beam gear.
By actively driving the delivery beam to match the rotation angle of the take-up roller, a certain tension was applied to the warp threads.

In addition, even if the tension fluctuates due to a change in the winding diameter of the sending beam, the tension fluctuation is detected by an arbitrary detection means, and feedback is sent to the gear lever of the continuously variable transmission to correct the tension fluctuation and keep the tension constant. The tension is given to the tension.

However, the above-mentioned conventional technology has the following disadvantages. Firstly, in order to prevent the overrun of the delivery beam from interfering with the accurate delivery of the warp threads, it is necessary to install a brake means to restrict the overrun of the delivery beam. When using a worm gear, if the gap between the gear teeth is large, the delivery beam will overrun by that much, so the size of the gap between the gear teeth will have a significant effect on the braking action of the worm gear.

By the way, in the conventional system in which a beam pinion is directly fixed to the output shaft of the worm gear and the beam gear is meshed with the beam pinion to transmit power, the slight movement that occurs during weft beating is not weakened midway through the beam gear. Since the shock is directly transmitted to the worm through the shock absorber, if the shock is applied to the worm over a long period of time, the disadvantageous result is that the shock accelerates wear and damage on the teeth of the gear.

In this case, the worm gear is no longer able to prevent the normal braking action, and as a result, it is no longer possible to accurately unwind the warp yarns, resulting in the weaving of defective fabrics.

Secondly, in the prior art, which does not have a means for damping the micro-movement that occurs during weft beating, the gears of the worm gear generate noise due to impact, which is an inconvenient situation.

Furthermore, thirdly, if the fine movement is directly transmitted to the continuously variable transmission side, the load applied to the continuously variable transmission will fluctuate, making it difficult to apply a constant tension to the warp threads. There were also some drawbacks.

The present invention solves the above-mentioned drawbacks by providing a micro-motion absorbing device on the intermediate shaft adjacent to the worm gear.The worm gear receives some of the generated micro-motion, but the majority of the micro-motion is attenuated by the micro-motion absorbing device, so that the worm gear is not affected by the impact. The object of the present invention is to enable the warp threads to be accurately paid out using a micro-motion absorbing device as small as possible while preventing wear and damage caused by the threads as much as possible, and also to prevent the generation of noise.

The present invention will be explained below with reference to the drawings. When the loom starts operating, power from the loom main body enters the continuously variable transmission 1 via the belt, and from the output shaft of the continuously variable transmission to the two intermediate shafts 4A, 4B. Output shaft 9a of worm gear 9 via intermediate gears 2 and 3 attached to
transmitted to.

In this case, the two intermediate shafts 4A and 4B are fitted onto a U-shaped support 5 via bearings, and a sleeve 6 is fixed to one of the intermediate shafts 4A. Further, a hub 7 provided with a flange portion 7a is fixed to the other intermediate shaft 4B, and both are connected by a polygonal annular elastic body 8.

To describe the polygonal annular elastic body 8 in detail, a donut-shaped rubber body 8a is provided with thick wall portions 8b at equal intervals on the circumference, and a radial cylindrical body 8c is provided with internal threads on the thick wall portions. An arbitrary number of cylindrical bodies 8d in the axial direction are alternately buried.

As is clear from FIG. 6, the thick part in which the radial cylinder 8c is buried is displaced outward from the circumferential line passing through the center of the thick part in which the axial cylinder 8d is buried. Therefore, by tightening the radial bolts 8e against the hub 7, the rubber body is firmly held on the sleeve 6 in a pre-compressed state.

Then, when the axial bolt 8f is tightened to the flange portion 7a of the hub 7, the polygonal annular elastic body 8 acts as a flexible joint, and the hub 7 can rotate integrally with the sleeve 6, so that the intermediate gear 3 Power can be transmitted to the input shaft 9a of the worm gear 9 via the worm gear 9.

A worm 9b is formed on the input shaft 9a, and a worm gear 9d that meshes with the worm is attached to one end of the output shaft 9c that intersects the input shaft at a right angle at a close distance. Worm gear 9d has only one tooth (in case of single helix)
Since it rotates, the output shaft 9c is decelerated to 1/n, where the number of teeth is n.

Next, a beam pinion 10a constituting a beam gear 10 is fixed on the output shaft 9c, and a beam gear 10b is meshed with this beam pinion to transmit the power taken out from the loom main body, and to actively move the delivery beam 11. drive. In the figure, 12 is a winding beam, and 13 is a lever of a continuously variable transmission.

In the above configuration, when the warp yarns are actively paid out with the rotational drive of the sending beam 11, and the basic operations of weft insertion and weft beating are performed continuously at the warp opening, a problem occurs during the weft beating process. The slight movement is transmitted to the worm gear 9 via the beam gear 10. By the way, the slight movement that entered the worm gear 9 causes the output shaft 9 to
c, the worm gear 9d, and the worm 9b to the input shaft 9a side, but the intermediate shafts 4A and 4B at the rear position of the input shaft are separated from each other, and furthermore, this separated intermediate shaft A, 4
Since B is connected by a polygonal annular elastic body 8 which has a damping effect, the input shaft side of the worm gear 9 can act as a micro-movement absorber, and as a result, the worm gear 9 does not lose its safety due to the micro-movement. It won't happen.

That is, since the intermediate shafts 4A and 4B are elastically connected via the polygonal annular elastic body,
This means that the output side of the continuously variable transmission and the input side of the worm gear are connected with a low torsional spring constant.
Therefore, the load in the rotational direction received from the worm gear side is absorbed by the torsion of the polygonal annular elastic body, and vibrations and shocks can be suppressed to at least less than the load in the thrust direction.

The present invention has the following effects based on the above configuration. First, if the micro-movement that occurs during weft beating can be attenuated, it is possible to prevent tooth wear and damage due to impact, which has the effect of extending the life of the gear. Second, by absorbing minute movements and preventing impacts between gears, noise generation can be kept to a minimum. Thirdly, even if the loom is operated continuously for a long period of time, there is almost no wear or damage to the teeth due to impact, making it possible to always pay out the warp threads accurately in a stable state, thereby providing a good quality fabric. be able to. Fourthly, the output side of the continuously variable transmission to which the input shaft of the worm gear is connected is supported by an annular elastic body, which follows and absorbs the rotational load applied to the input shaft of the worm gear due to minute movements. Therefore, there is no reduction in braking action due to gear wear or damage. Fifth, since the transmission of fine movements to the continuously variable transmission is reduced, load fluctuations on the continuously variable transmission are reduced, and it is possible to send out the warp yarns with a constant tension.

In the above description, a rubber body was used as an example of the material for the polygonal annular elastic body, but materials other than the rubber body, such as synthetic resin, may be used as long as they can attenuate minute movements.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a side view showing the schematic structure of a winding and delivery device of a loom, and Fig. 2 shows a positive warp delivery device operatively connected to the delivery device. A front view, FIG. 3 is a longitudinal sectional view of the shock absorbing device provided between the intermediate gears in FIG. 2,
4 and 5 are explanatory diagrams showing the operating states of the worm gear and beam gear, and FIG. 6 is a perspective view of the polygonal annular elastic body. Explanation of symbols, 1...Continuously variable transmission, 2, 3...Intermediate gear, 4A, 4B...Intermediate shaft, 5...Support stand,
6... Sleeve, 7... Hub, 7a... Flange portion, 8... Polygonal annular elastic body, 8a... Rubber body,
8b... Thick part, 8c... Radial cylinder, 8d
...Axial cylinder, 8e...Radial bolt, 8
f...Axis bolt, 9...Worm gear, 9
a... Input shaft, 9b... Worm, 9c... Output shaft, 9b... Worm gear, 10... Beam gear, 10a... Beam pinion, 10b... Beam gear, 11... Delivery beam, 12... Winding beam, 13... Speed lever, 14... Warp, 1
5...Textile.

Claims (1)

[Scope of Claim for Utility Model Registration] The power extracted from the loom body is changed in speed by a continuously variable transmission, and transmitted to the worm gear via an intermediate gear that meshes the output shaft of the continuously variable transmission with the input shaft of the worm gear. In a loom equipped with a device in which the worm gear decelerates the warp, the transmission is transmitted to the delivery beam via the beam gear, and the delivery beam is driven to send out the warp at a constant tension, wherein the continuously variable transmission side The output shaft of is formed by two intermediate shafts that are separated and supported respectively, one intermediate shaft is equipped with a sleeve, and the other intermediate shaft is equipped with a hub with a flange, and the sleeve and hub are attached to each other. is a weft beating micro-tremor absorbing device for looms, which is connected by an annular elastic body that absorbs vibrations and shocks by damping effect.