JPH0333248A - Tack-in needle driving unit in tack-in selvedge apparatus - Google Patents

Abstract

PURPOSE:To deal with the speedup of the weaving machine by allowing the cam follower connecting to the tack-in needle to connect slidably through the switching cam to the idling or driving profile of the driving cam, thus increasing the follow-up properties. CONSTITUTION:Can follower 33 connected to tack-in needle 2 is slidably connected through the switching cam 41 selectively to the idling profile 28 of the drive cam 21 or through common groove 30 to the driving profile 20. When the yarn is not taken up, the cam follower 33 is slidably connected to the idling profile 28 to reciprocate the tack-in needle 2 only between the waiting position and the intermediate position, but to stop the reciprocation around the needle shaft 11 and not to take up the yarn. When the cam follower 33 is slidably connected to the driving profile 20, the tack-in needle 2 is allowed to move back and forth and reciprocate to catch the end 5 of the weft extending between the weft-holding end 3 and the selvedge 6 and turning it and insert into the next opening of the warp.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tuck-in needle drive device for a tuck-in selvage device.

The tuck-in needle drive device of the conventional tuck-in selvedge device is
Basically, the tuck-in needle shaft, on which the tuck-in needle is attached, is linked to a drive cam via a power transmission mechanism, and the rotation of the drive cam moves the tuck-in needle back and forth in the warp elongation direction at the required timing, and the tuck-in needle shaft By reciprocating, the weft end stretched between the weft end holder of the tuck-in selvage assembly device and the selvedge of the woven fabric is caught, folded back, and weaved into the warp opening.

By the way, in order to tuck in a pile weave, since the advancing position of the reed is different between the pile forming reed beating and the blind reed beating due to Terry Morsitan, if you try to tuck in every weaving cycle, the tuck-in selvedge assembly device will not work properly. , and lacks high speed.
The tuck-in needle is driven to take up yarns every plural weaving cycles, and the ends of a plurality of weft yarns are collectively tuck-in without moving the tuck-in selvedge assembly device.

For this reason, as shown in Japanese Patent Laid-Open No. 59-130349, a structure is known in which the driving of the tuck-in needle by the drive cam is stopped.

Problems to be Solved by the Invention However, the mechanism for stopping the driving of the tuck-in needle by the drive cam described above is a mechanism in which the cam follower, which is urged by a spring on the drive cam and follows, is retracted by another cam. Since returning from the state to the driving state is carried out by the biasing force of a spring, there is a problem that the weaving machine lacks high speed and cannot cope with the increase in the speed of the loom.

Means for Solving the Problems A structure comprising a switching mechanism for selectively linking a cam follower connected to a tuck-in needle to a resting profile of a drive cam and a drive profile that shares part of this, the switching mechanism's selective linking. It has a structure in which the movement is performed by a positive cam.

When the working tuck-in needle is not threading, a switching mechanism brings the cam follower into sliding engagement with the rest profile of the drive cam. Further, when thread take-up is performed with the tuck-in needle, the cam follower is brought into sliding engagement with the drive profile of the drive cam by the switching mechanism.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 to 5, the tuck-in selvage assembly device 1 shown in this embodiment is roughly equipped with a tuck-in needle 2, a thread end holder 3, and a cutter 4, In weaving, the cutter 4 cuts the weft yarn 5 (whipped during pile formation) to set the required weft insertion length, and at the same time, the cut end of the weft yarn 5 is held by the weft end holder 3 to hold the tinsel end. The ends of the weft threads 5 stretched between the weave 3 and the weaving selvage 6 are caught by the tuck-in needles 2 and drawn into the next warp thread 7 opening.

Here, the tuck-in needle 2 is a tuck-in needle shaft attached to the device main body IO! The tuck-in needle shaft 1 is attached to the downstream end of the needle shaft 1 and is driven by a drive device 12.
1 is reciprocated in the circumferential direction, the weft 5 is reciprocated in the elongation direction about the tuck-in needle shaft 11, and the tuck-in needle shaft 1 is driven by the drive device 12.
The warp threads 7 are moved back and forth in the elongation direction by the back and forth movement in the axial direction of the warp threads 1, and thereby move to the retracting position shown by the solid line and the catching position shown by the imaginary line in FIG. 5 via the intermediate position shown by the dashed line. It is supposed to be done. The drive device 12 is divided into a reciprocating drive device 20 and a back-and-forth drive device 70.

The reciprocating rotation drive device 20 includes a drive cam 21, a power transmission mechanism 22, and a switching mechanism 23.

The drive cam 21 is configured as a grooved cam formed on the circumferential surface of a disc-shaped cam member 25. The cam member 25 is the drive shaft 2
It is fixed coaxially to the middle part of 6. The drive shaft 26 extends in a direction perpendicular to the tuck-in needle shaft 2 and is rotatably installed across the left and right walls of the apparatus main body 10 in the weft 5 extending direction. Device body 10 of drive shaft 26
The outwardly protruding end portion is connected to a drive shaft on the loom side that is interlocked with the main shaft of the loom via a toothed boot and a timing belt (not shown). The drive cam 21 is constructed by connecting a rest profile 28 and a drive profile 29 of the tuck-in needle 2 via one common cam 30. The rest profile 28 is a shallow cam groove that is not displaced from the common cam groove 30 in a direction parallel to the axis of the cam member 25. The drive profile 29 is a deep cam groove that is displaced from the rest profile 28 to one side parallel to the axis of the cam member 25 in the rotation angle range required for reciprocating rotation of the tuck-in needle 2.

Further, the common cam groove 30 communicates the rest profile 28 and the drive profile 29 and has the same deep clearance as the drive profile 29.

The power transmission mechanism 22 converts the movement of the cam follower 33 on the drive profile 29 into reciprocating rotation of the tuck-in needle 2, and the cam follower 33 is connected to the shaft 34.
The shaft 34 is slidably inserted into a through hole 36 formed in the slider 35 and having approximately the same diameter as the shaft 34 . Slider 35 is the device main body IO
The cam member 25 is slidably engaged with a guide rail 37 fixed to the cam member 25 in a direction parallel to the axis thereof. A rack gear 38 is fixed to the slider 35. The rack gear 38 is a pinion gear 3 fixed to the middle part of the tuck-in needle shaft 11.
It is engaged with 9. The slider 35 is biased by a spring (not shown) so that the cam follower 33 comes into contact with one side of the shallow groove forming the rest profile 28, one side of the deep groove forming the drive profile 29, and one side of the common cam 30. has been done. The rear end of the shaft 34 is connected to the switching mechanism 23.

The switching mechanism 23 is a cam follower 3 of the power transmission mechanism 22.
3 is selected and linked to the rest profile 28 and drive profile 29 of the drive cam 21,
The cam structure is such that this selective linkage operation is actively performed. Specifically, the switching mechanism 23 has a deceleration shaft 401;
- Equipped with a switching cam 41 that is fitted and fixed, and a cam follower 43 that slides and engages in a cam groove 42 formed on the end face of the switching cam 4I is rotatable on a fixed shaft 44 that is horizontally suspended at the rear of the device main body ■0 A clevis 48 is rotatably connected to the tip of the other arm 47 of the bifurcated lever 45, and a clevis 48 is attached to the tip of the U-shaped tip of the clevis 48. The rear end of the shaft 34 of the power transmission mechanism 22 is fitted onto the suspended shaft 49 so as to be movable in the axial direction of the drive cam 21, and the rotation of the switching cam 41 causes the cam follower 33 of the power transmission mechanism 22 to move to the drive cam. It moves forward and backward in the radial direction of 21. In addition, the deceleration shaft 40 to which the switching cam 4■ is fixed is connected to the device main body I.
The drive shaft 26 is rotatably installed across the left and right walls of O.
drive gear 51. Intermediate gear 52. driven gear 53
I/N per rotation of the drive shaft 26.
When pile forming reeding is performed once every three weaving cycles by rotation, for example terry motion, the
Rotate 3 times. The driven gear 53 is rotatably attached to the reduction shaft 40, rotates together with the reduction shaft 40 when the clutch 55 is engaged, and rotates freely relative to the reduction shaft 40 when the clutch 55 is disengaged. The clutch 55 is, for example, an SR clutch manufactured by Tsubakimoto Emerson Co., Ltd., which has a polygonal inner ring 56 fitted and fixed to the reduction shaft 40 and fixed to the driven gear 53, as shown in Fig. 1.4. outer ring 57
, a roller 58 interposed between the inner ring 56 and the outer ring 57, and a trip cage 59 that moves the roller 58 in the circumferential direction, and is connected to the trip cage 59 as shown in FIG. 4(A). Trip cam 60 stopper ff16
1, when the free end of the lever 62 comes into contact with the lever 62, the roller 58 is pushed by the trip cage 59 and is freely disposed between the inner ring 56 and the outer ring 57, as shown in FIG. is disengaged and the clutch 55 enters the disengaged state, and when the free end of the lever 62 comes off the stopper part 61 as shown in FIG. Trip cage 59 due to elastic force
pushes the rollers 58 into the engaged position, the inner ring 56 and the outer ring 57 are connected via the rollers 58, and the clutch 55
enters the contact state.

The base end of the lever 62 is rotatably attached to the device main body IO with a fixed shaft 65, and the intermediate portion of the lever 62 is attached to the device main body 10.
A pin 68 is connected to an armature 67 of a solenoid actuator 66 as an actuator attached to the lever, and the solenoid actuator 66 drives the free end of the lever 62 between a position in which it contacts the stopper part 61 and a position in which it comes out of the stopper part. .

In the back-and-forth movement drive mechanism 70, the free end of a lever 72 connected to the device body 10 by a pin 71 is connected to a bracket 73 attached to the middle part of the tuck-in needle shaft 11 so as to be rotatable in the circumferential direction but immovable in the axial direction. At the same time, a cam follower 74 provided at the intermediate portion of the lever 73 is slidably engaged with a groove cam 75 formed on the end surface of the cam member 25, and the rotation of the drive cam 21 causes the tuck-in needle shaft 11 to move back and forth in the axial direction. do.

The effects of the above example structure are (1) pile structure and (2)
The explanation will be divided into non-pile tissue and non-pile tissue.

(1) When weaving a pile structure, the drive shaft 26 rotates once for each rotation of the loom main shaft, that is, for each weaving cycle, but the armature 67 of the solenoid actuator 66 is moved backward by a controller (not shown) of the loom. , the lever 62 is disengaged from the stopper part 61, the clutch 55 vibrates, and the driven gear 53 rotates together with the reduction shaft 40, so the reduction shaft 40 rotates once for every three rotations of the loom main shaft, that is. The switching cam 41 rotates once when the drive cam 21 rotates three times.

In other words, in the two revolutions of the drive cam 2I that correspond to the weaving cycle of blind beating out of the three revolutions of the main shaft of the loom, the cam follower 33 is activated by the cam 42 of the switching cam 41 as shown in FIG. It is retracted radially outwardly into sliding engagement with a shallow cam resting profile 28 of the drive cam 21. As a result, during the two blind reeding weaving cycles, the tuck-in needle shaft 11 is moved back and forth in its axial direction by the back and forth drive device 60, but the cam follower 33 is not slidably engaged with the resting profile 28. The reciprocating rotation in the circumferential direction is restricted by the tuck-in needle 2.
The tuck-in needle 2 only moves back and forth between the retracted position and the intermediate position, and the reciprocating rotation of the tuck-in needle 2 about the tuck-in needle shaft 11 is stopped, and the thread take-up drive of the tuck-in needle 2 is not performed.

During one rotation of the drive cam 21, which corresponds to the weaving cycle of pile forming and reed beating, among the three rotations of the loom main shaft, the rotation angle of the loom main shaft changes before the reciprocating rotation of the tuck-in needle 2 starts, that is, the cam follower 33 When the common cam 1M30 rotates, the rotation of the drive cam 2I and the switching cam 4I progresses, and the cam follower 33 advances inward in the radial direction of the drive cam 2I along with the cam 42 of the switching cam 41 and stops. The profile 28 is linked to the drive profile 29 . As a result, the tuck-in needle 2 is sequentially moved from the retracting position to the intermediate position to the catching position to the intermediate position to the retracting position by the cooperation of the back-and-forth movement drive device 60 and the reciprocating rotation drive device 20, and the weft end holder 3 The ends of the weft yarns 5 stretched between the weaving selvedges 6 and the weaving selvedges 6 are caught, turned back, and woven into the next opening of the warp yarns 7. Moreover, the cam follower 3
3 cooperates with the drive profile 29, and when the tuck-in needle 2 comes to the catching position and takes up the thread, the cam follower 33 is slidably engaged with one side of the drive profile 29, so vibration of the tuck-in needle 2 is eliminated. This prevents thread take-up mistakes.

(2) When weaving a non-pile weave, with the cam follower 33 in the common cam groove 30, the armature 67 of the solenoid actuator 66 is advanced by the controller (not shown) of the loom, and the lever 62 is moved forward.
comes into contact with the stopper portion 61, and the clutch 55 is disengaged. Then, the driven gear 53 becomes in a state of freely rotating with respect to the reduction shaft 40, and although the drive cam 21 rotates due to the rotation of the drive shaft 26, the reduction shaft 40 comes to a stopped state. In other words, the cam 1W4 of the switching cam 41 whose cam follower 33 is stopped due to the disengagement of the clutch 55
2, the drive cam 21 remains advanced inward in the radial direction and continues to be linked to the drive profile 29. As a result,
For each rotation of the loom main shaft, that is, for each weaving cycle, the tuck-in needle 2 moves from a retracted position to an intermediate position to a capture position to an intermediate position to a retracted position by the cooperation of the back-and-forth movement drive device 60 and the reciprocating rotation drive device 20. The weft threads 5 end stretched between the weft end holder 3 and the weaving selvedge 6 are caught, turned back, and woven into the next warp thread 7 opening.

In the above embodiments, a tuck-in selvage assembly device for the middle ear was illustrated and explained, but it goes without saying that the present invention can also be applied to a tuck-in selvage assembly device for the weft insertion side and the cotton insertion side.

Effects of the Invention As described above, according to the present invention, the selective linked operation of the switching mechanism is achieved by using a drive cam having a rest profile and a drive profile to stop the tuck-in needle without taking up the thread or to drive it so as to take up the thread. Since this can be done actively using the cam, it is possible to improve the followability of the cam follower connected to the tuck-in needle to the drive cam, thereby easily achieving higher speeds of the loom.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional plan view of the upper part of the device main body showing one embodiment of the present invention, Fig. 2 is a side view showing the main parts of the same embodiment, and Fig. 3 is a cam follower and switching mechanism of the same embodiment. FIG. 4 is a plan view showing the connecting part of the same embodiment, and FIG. FIG. 5 is a schematic diagram showing the surroundings of the tuck-in ear assembly device of the same embodiment. ! ...Tuck-in ear assembly device, 2...Tuck-in needle, 2-toe...Drive cam, 23...Switching mechanism, 28...Body+h profile, 29...Drive profile, 30...Common cam Groove, 33...Cam follower, 41...Switching cam. Outside 3 people 1st plan 1 shift in ear set tack in needle and glance at F life cam @ 1 takuii Mizuhoku profile 12 first profile common cam clear cam follower WL 7) mm Figure 2 2 Figure 3 5 Figure 5 '4 (A) 0 (C) (B)

Claims (1)

[Claims] (1) A structure including a switching mechanism that selectively links a cam follower connected to a tuck-in needle to a rest profile of a drive cam and a drive profile that shares a part of the drive profile, and the selective linkage operation of the switching mechanism is controlled by an active cam. A tuck-in needle drive device for a tuck-in selvedge assembly device, characterized in that the tuck-in needle drive device has a structure in which the tuck-in selvedge-assembly device is configured to perform the tuck-in selvage assembly.