JP4006890B2 - Fluff adhesion prevention device in tuck-in device of loom - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluff adhesion preventing device in a tuck-in device for forming a woven fabric ear by folding back the tip of a weft thread inserted into a warp opening.
[0002]
[Prior art]
In the tuck-in device disclosed in Japanese Utility Model Publication No. 62-3587, the tip of the weft thread inserted is drawn into the warp thread opening by the needle. The tuck-in operation of the needle for folding the tip of the weft thread inserted into the warp opening to form the ear of the woven fabric is performed based on the operation at a preset timing of the mechanism in the tuck-in device. A timing belt is stretched between the timing pulley fixed to the driven shaft of the tack-in device and the timing pulley fixed to the drive shaft. The mechanism obtains a driving force via the timing belt.
[0003]
[Problems to be solved by the invention]
The tuck-in operation of the needle is performed at a timing that does not interfere with the heel behind the woven fabric, that is, within the oscillating region of the heel. Therefore, the needle is disposed at a position outside the swinging region of the heel during a time other than the tuck-in operation. That is, the needle is arranged on the woven fabric side before the weaving when it is not the tuck-in operation. Such switching of the arrangement position of the needle is performed based on the operation of the mechanism in the tack-in device. For this reason, when the meshing between the timing belt and the timing pulley is shifted, the operation timing of the mechanism, and hence the needle, is shifted. Such a shift in the operation timing includes a shift in the switching timing of the arrangement position of the needle, and the tuck-in operation of the needle may be performed at a timing that interferes with the heel within the oscillating region of the heel. This results in damage to the tuck-in device. The deviation in meshing between the timing belt and the timing pulley is caused by the attachment of fluff to the timing belt or the timing pulley. The installation position of the tuck-in device is a position close to the woven cloth before the weaving, and the occurrence of fluff is particularly large in the vicinity of the woven cloth hit by the heel.
[0004]
An object of this invention is to suppress the fluff sticking to a timing belt and its winding object.
[0005]
[Means for Solving the Problems]
The present invention includes a tack-in device that folds the tip of a weft thread inserted into a warp opening to form an ear of a woven fabric, and a timing belt is wound around an input shaft and an intermediate shaft on the drive source side of the tack-in device. multiplying, targeting the loom for transmitting the driving force to the input shaft through the timing belt from the intermediate shaft.
[0006]
Further, in the invention of claim 1, prior Symbol tuck-in device is intended which includes a box with a built-in mechanism to perform the tuck operation, projecting said input shaft for transmitting a driving force to said mechanism to the outside from one side of the box The timing belt is disposed along the one surface, and a dust cover having an open portion is fixed to the one surface, and a part of the open portion is shielded by the one surface.
[0007]
A configuration using one side of the box to avoid sticking is convenient.
Further, in the invention of claim 1, the loom is disposed above the woven cloth take-up means for taking up the woven cloth by cooperation of the surfer roller and the press roller, and the woven cloth holding portion between the surfer roller and the press roller. It is assumed that a front cover is provided, and the intermediate shaft is disposed immediately below the front cover, and is located between the timing pulley on the input shaft side and the timing pulley on the input shaft side and the timing pulley on the intermediate shaft side. The timing belt on the tension roller to be disposed is surrounded by one surface of the dust cover and the box, and the timing pulley on the intermediate shaft side and the timing belt on the timing pulley on the intermediate shaft side of the opening portion Exposed from.
[0008]
The front cover is used to avoid sticking to cotton.
In the invention of claim 2, Oite to claim 1, wherein the dust cover is formed of see-through material.
[0009]
Belt breakage can be confirmed from outside the dust cover.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0011]
As shown in FIG. 1, the woven fabric W is wound around a cross roller (not shown) via an expansion bar 11, a surface roller 12 and a press roller 13. The woven fabric W is sandwiched between the surface roller 12 and the press roller 13, and the surface roller 12 and the press roller 13 cooperate to take up the woven fabric W. A front cover 14 is disposed above the vicinity of the woven fabric holding portion between the surfer roller 12 and the press roller 13 constituting the woven fabric take-up means. As shown in FIG. 3, the front cover 14 has a length extending from one side frame 15 to the other side frame 16.
[0012]
As shown in FIG. 2, a drive shaft 17 is provided through the side frame 15, and a timing pulley 18 is fixed to a protruding end portion of the drive shaft 17 that protrudes outward from the side frame 15. The drive shaft 17 obtains a drive force from a loom drive motor (not shown). As shown in FIG. 3, an intermediate shaft 19 is provided through the side frames 15 and 16. A timing pulley 20 is fixed to an end portion of the intermediate shaft 19 on the side frame 15 side. A pair of timing belts 21A and 21B are wound around both timing pulleys 18 and 20. A tension roller 22 is disposed between the timing pulleys 18 and 20. The tension roller 22 guides the timing belts 21A and 21B so as to apply an appropriate tension to the timing belts 21A and 21B.
[0013]
Capacitance type proximity sensors 49 and 50 are disposed in the vicinity of the travel paths of the timing belts 21A and 21B. The proximity sensor 49 detects a belt break of the timing belt 21A, and the proximity sensor 50 detects a belt break of the timing belt 21B. When the belt out of the timing belt 21A or the timing belt 21B is detected, the operation of the loom is immediately stopped.
[0014]
The timing pulleys 18 and 20, the timing belts 21A and 21B, the tension roller 22, and the proximity sensors 49 and 50 are covered with a metal cover 51 that cannot be seen through.
[0015]
Timing pulleys 43 and 44 are fixed to the intermediate shaft 19 between the side frames 15 and 16. The timing pulley 43 is disposed near the inner surface of the side frame 15, and the timing pulley 44 is disposed near the inner surface of the side frame 16.
[0016]
Tuck-in devices 23 and 24 are installed at the upper end of a breast beam (not shown) extending between the side frames 15 and 16. FIG. 5 shows the tack-in device 23 on the side frame 15 side. The tuck-in device 24 on the side frame 16 side is symmetrical to the tuck-in device 23. The tack-in device 23 forms an ear at the end of the woven fabric W on the side frame 15 side, and the tack-in device 24 forms an ear at the end of the woven fabric W on the side frame 16 side.
[0017]
Reference numeral 25 denotes a cam box having a built-in cam mechanism. A shaft 26 and a hollow shaft 27 are extended and supported by the cam box 25 so as to reciprocate in the moving direction of the woven fabric W. A needle shaft 28 is inserted through the hollow shaft 27. The needle shaft 28 can be reciprocated by a cam mechanism in the cam box 25. A needle 29 is attached to the tip of the needle shaft 28 extending from the hollow shaft 27, and the tip of the needle 29 scrapes the upper warp T into the warp opening as the needle shaft 28 rotates.
[0018]
A mounting base 30 is installed and fixed between the distal ends of the shaft 26 and the hollow shaft 27, and a holding block 31 is fastened and fixed to a hanging portion 301 of the mounting base 30. A pair of nozzle bases 32, 33 are provided on the lower front surface of the holding block 31 so as to be aligned vertically. A threading nozzle 321 is provided on the lower surface of the upper nozzle base 32 and the lower nozzle base 33. In this case, an introduction hole 331 is provided so as to face the threading nozzle 321. A thread gripping nozzle 332 is provided on the upper surface of the lower nozzle base 33, and an introduction hole 322 is provided in the upper nozzle base 32 so as to face the thread gripping nozzle 332.
[0019]
A pair of blades 34, 35 are rotatably supported on the lower side surface of the holding block 31, and guide pins 341, 351 projecting from the rear portions of the blades 34, 35 are supported on the lower surface of the cam box 25. The guide body 37 is inserted into guide grooves 371 and 372. Both the blade bodies 34 and 35 move back and forth integrally with the shaft 26 and the hollow shaft 27, and the both blade bodies 34 and 35 perform an open / close cutting operation by the guide action of the guide grooves 371 and 372 and the guide pins 341 and 351. The weft thread (not shown) inserted by the weft is cut by this opening / closing cutting operation.
[0020]
A mechanical rotary valve mechanism 38 is attached to the outer surface of the cam box 25. The rotary valve mechanism 38 is driven by a drive mechanism in the cam box 25. The threading nozzle 321 and the thread gripping nozzle 332 are connected to the rotary valve mechanism 38 via tubes 39 and 40, and the air injection in the threading nozzle 321 and the thread gripping nozzle 332 is controlled by driving the rotary valve mechanism 38. .
[0021]
The front ends of the wefts cut by the blades 34 and 35 are blown into the introduction hole 322 by the injection action of the yarn gripping nozzle 332. Thereafter, the tip of the needle 29 enters the warp opening and enters between the nozzle bases 32 and 33, and the threading hole 291 of the needle 29 is disposed between the threading nozzle 321 and the introduction hole 331. Next, the threading nozzle 321 ejects, and the tip of the weft thread is passed through the threading hole 291. As the needle 29 rotates and retracts, the tip of the weft is folded back into the warp opening.
[0022]
As shown in FIG. 4, the input shaft 41 protrudes from the inner surface 251 of the cam box 25, and a timing pulley 42 is fixed to the protruding end portion of the input shaft 41. A pair of timing belts 45A and 45B are wound around the timing pulley 42 and the timing pulley 43. A tension roller 46 is disposed between the timing pulleys 42 and 43. The tension roller 46 guides the timing belts 45A and 45B so as to apply an appropriate tension to the timing belts 45A and 45B. The timing belts 45 </ b> A and 45 </ b> B are disposed along the inner surface 251.
[0023]
Support columns 252 and 253 are erected on the inner side surface 251 of the cam box 25, and a dust-proof cover 47A made of a transparent synthetic resin is screwed to the support columns 252 and 253. The integrally formed dustproof cover 47 </ b> A is fixed to the inner surface 251 of the cam box 25 by tightening a screw 48 screwed to the columns 252 and 253. An opening 471 is formed in the dust cover 47 </ b> A, and a part of the opening 471 is shielded by the inner surface 251. The dust cover 47 </ b> A surrounds the timing belts 45 </ b> A and 45 </ b> B in the vicinity of the timing pulley 42 and the tension roller 46. As shown in FIG. 1, the intermediate shaft 19 and the timing pulley 43 are directly under the front cover 14.
[0024]
Also in the tuck-in device 24 on the side frame 16 side that is symmetrical to the tuck-in device 23, a dust-proof cover 47A and a dust-proof cover 47B that is bilaterally symmetrical are disposed. The dust cover 47B is also integrally formed of a material that can be seen through.
[0025]
The following effects can be obtained in the first embodiment.
(1-1) The dustproof covers 47A and 47B surround part of the timing belts 45A and 45B. A part of the timing pulley 42, the tension roller 46, and the timing belts 45 </ b> A and 45 </ b> B are surrounded by dust-proof covers 47 </ b> A and 47 </ b> B and the inner surface 251 of the cam box 25. The configuration in which the timing belts 45A and 45B are surrounded by the dustproof covers 47A and 47B suppresses the attachment of the fluff to the timing belts 45A and 45B and the timing pulley 42 to be wound around.
[0026]
(1-2) The inner side surface 251 of the cam box 25 to which the dust covers 47A and 47B are fixed shields a part of the open portion 471 of the dust covers 47A and 47B. The inner side surface 251 that shields a part of the opening 471 of the dust covers 47A and 47B contributes to prevention of fluff sticking to the timing belts 45A and 45B and the timing pulley 42. If the timing belts 45 </ b> A and 45 </ b> B are surrounded by a dustproof cover like the inner surface 251, the dustproof cover must be made of two bodies, and the attachment property becomes extremely poor. The configuration using the inner side surface 251 which is one surface of the cam box 25 to avoid the attachment of the fluff brings about simplification of the shape of the dustproof covers 47A and 47B and ease of attachment of the dustproof covers 47A and 47B.
[0027]
(1-3) The intermediate shaft 19 that supports the timing pulleys 43 and 44 to be wound around the timing belts 45A and 45B is a shaft that is laid between the side frames 15 and 16. Further, the intermediate shaft 19 is separated from the cam box 25. For this reason, if it is attempted to surround the timing pulleys 43 and 44 with the dust-proof cover, the shape of the dust-proof cover becomes complicated and the production becomes troublesome. Although the timing pulleys 43 and 44 are not surrounded by the dustproof covers 47A and 47B, the front cover 14 surrounds the upper side and the front side of the intermediate shaft 19. Accordingly, the front cover 14 contributes to prevention of fluff adhesion to the timing pulleys 43 and 44 not surrounded by the dust-proof covers 47A and 47B and the timing belts 45A and 45B in the vicinity thereof.
[0028]
(1-4) Even when the timing belts 45A and 45B are cut, it is possible to detect the belt cut from the outside of the dust covers 47A and 47B.
(1-5) When it becomes necessary to remove the dust covers 47A and 47B due to the occurrence of belt breakage or the like, the dust covers 47A and 47B can be easily removed from the cam box 25 by removing the screws 48.
[0029]
(1-6) When the timing belts 21A and 21B in the non-permeable cover 51, which prevents the attachment of fluff, are cut off, the proximity sensors 49 and 50 immediately detect the cutting of the timing belts 21A and 21B. Although not shown in the figure, a structure for attaching other members to the large metal cover 51 is appropriately employed. Therefore, the material of the cover 51 is preferably a metal excellent in strength. It is necessary to use the proximity sensors 49 and 50 to detect such a belt breakage in the metal cover 51 that cannot be seen through. On the other hand, there is no need to attach other members to the small dustproof covers 47A and 47B, and it is not necessary to adopt a material having excellent strength as the material of the dustproof covers 47A and 47B. Therefore, a synthetic resin that is easy to form is preferable as the material of the dustproof covers 47A and 47B. Therefore, if a transparent synthetic resin is used as the material of the dust covers 47A and 47B, it is possible to detect the belt breakage of the timing belts 45A and 45B without using a sensor. Such adoption of a sensor contributes to cost reduction by reducing the number of sensors.
[0030]
(1-7) The use of double lines for the timing belts 45A and 45B prevents the operation timing of the tack-in device from shifting even when one of the belts is cut. Similarly, the use of double lines for the timing belts 21A and 21B prevents a deviation in the operation timing of the tack-in device even when one of the belts is cut.
[0031]
(1-8) Since the dust-proof covers 47A and 47B are integrally formed of a see-through synthetic resin, the inside can be seen through from all directions. Therefore, not only the timing belts 45A and 45B are out of belt, but also the state of engagement between the timing pulley 42 and the timing belts 45A and 45B, the state of tension applied to the timing belts 45A and 45B by the tension roller 46, and the like are easily confirmed visually. be able to.
[0032]
Next, a second embodiment of FIG. 6 will be described. The same components as those in the first embodiment are denoted by the same reference numerals.
The timing pulley 43 fixed to the intermediate shaft 19 is surrounded by an auxiliary cover 52 fixed to the side frame 15. The auxiliary cover 52 is fixed to the side frame 15. The dust cover 47A and the auxiliary cover 52 are joined to each other so as to surround the timing pulley 42, the timing pulley 43, and the timing belt 45A. Adoption of the auxiliary cover 52 suppresses the attachment of the fluff to the timing pulley 42, the timing pulley 43, and the timing belt 45A more effectively than in the case of the first embodiment.
[0033]
In the present invention, the following embodiments are also possible.
(1) The cover 51 is made of a transparent material and the proximity sensors 49 and 50 are not used.
(2) The dustproof covers 47A and 47B can be attached and detached with one touch by utilizing the elastic deformation of the synthetic resin of the dustproof covers 47A and 47B.
[0034]
【The invention's effect】
As described above in detail, in the present invention, the timing belt wound around the input shaft of the tack-in device and the drive shaft on the drive source side is surrounded by the dustproof cover, so that the adhesion of the fluff to the timing belt and the winding target is suppressed. There is an excellent effect of being able to.
[Brief description of the drawings]
FIG. 1 is an internal side view showing a main part of a first embodiment.
FIG. 2 is a main part outer side view.
FIG. 3 is a partially omitted plan view.
FIG. 4 is an exploded perspective view of a main part.
FIG. 5 is a perspective view of a tuck-in device.
FIG. 6 is an exploded perspective view showing a main part of a second embodiment.
[Explanation of symbols]
14 ... Front cover. 19: Intermediate shaft. 23, 24 ... Tuck-in device. 25 ... Cam box. 251 ... An inner surface that is one side of the box. 41 ... Input shaft. 45A, 45B ... Timing belt. 47A, 47B ... Dust-proof cover. 471 ... Opening part.

Claims (2)

A tuck-in device that folds the tip of the weft thread inserted into the warp opening to form a woven ear, and wraps a timing belt around the input shaft of the tuck-in device and the intermediate shaft on the drive source side, In a loom that transmits driving force from a shaft to the input shaft via the timing belt,
The tack-in device includes a box having a mechanism for performing a tack-in operation, the input shaft that transmits driving force to the mechanism protrudes from one surface of the box, and the timing belt is disposed along the one surface. A dust-proof cover having an open portion is fixed to the one surface, and the one surface shields a part of the open portion;
The loom includes a woven cloth take-up means for taking up the woven cloth by cooperation of the surfer roller and the press roller, and a front cover disposed above the woven cloth holding portion between the surfer roller and the press roller, and the intermediate shaft is It is arranged directly under the front cover,
Surrounds the timing belt on the tension rows La disposed intermediate the timing pulley and the input shaft side timing pulley and the intermediate shaft timing pulley of said input shaft at one side of the dustproof cover and the box In addition, a fluff adhesion preventing device in a tuck-in device of a loom in which the timing pulley on the intermediate shaft side and the timing belt on the timing pulley are exposed from the intermediate shaft side of the opening portion. The said dust-proof cover is a fluff adhesion prevention apparatus in the tack-in apparatus of the loom of Claim 1 formed with the material which can be seen through .

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