JPH01174644A - Driving unit for tuck-in needle of tuck-in selvaging apparatus - Google Patents

Abstract

PURPOSE:To obtain the subject unit, having a driving cam connected to a suspension profile and driving profile of a tuck-in needle through one common grooved cam and capable of miniaturizing a selvaging apparatus without requiring an increase in the number of driving cams. CONSTITUTION:When a cam follower 33 is brought into slide contact and connected to a suspension profile 28 of a driving cam 21 by a changeover mechanism 23, a tuck-in needle 2 is suspended so as to take up a thread. When the cam follower 33 is brought into slide contact and engaged with a driving profile 29 of the driving cam by the changeover mechanism 23, the tuck-in needle 2 is driven so as to take up the thread.

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
J Mi Basically, the tuck-in needle shaft on which the tuck-in needle is attached is connected 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 also performs tuck-in. The needle rotates back and forth around the needle axis to catch the weft end stretched between the weft end holder of the tuck-in selvage assembly device and the selvedge of the woven fabric, fold it back, and weave it into the warp opening. .

Problems to be Solved by the Invention As the speed of shuttleless looms increases, in order to prevent the tuck-in needle from vibrating when it stops at the weft catching position and causing yarn take-up mistakes, the tuck-in needle drive cam has to be improved. It is advantageous to construct it as a grooved cam.

By the way, in order to tuck in a pile weave, the forward position of the reed differs between pile forming reed beating and blind reed beating due to terry motion, so if you try to tuck in every weaving cycle, you will have to move the tuck-in selvedge assembly device. Therefore, instead of moving the tuck-in selvedge assembly device, the tuck-in needle is driven to take up threads every multiple weaving cycles to cook in the ends of multiple weft yarns at once. It has become. For this reason, the tuck-in needle is not rotated in synchronization with the main shaft of a shuttleless loom in a one-to-one ratio, and the tuck-in needle is not stopped (does not take up threads) or is driven (takes threads) using one grooved cam.

Therefore, it is possible to install a plurality of drive cams that rotate synchronously with the main shaft of the shuttleless loom, and to selectively link the tuck-in needle to one of these drive cams, or to cook-in one drive cam. It is conceivable that the main shaft of the shuttleless loom may be rotated synchronously with the main shaft of the shuttleless loom. However, in the former case, the tuck-in selvedge assembly device becomes larger due to the increased number of drive cams, and in the latter case, when driving the drive cam, the start of synchronization with the main shaft of the shuttleless loom tends to vary. , it is difficult to adopt it suddenly.

Accordingly, the present invention provides a tuck-in needle drive device for a cook-in selvedge assembly device that can stop and drive the tuck-in needle with one drive cam and overcome the surface problems.

Means for Solving the Problems A drive cam in which the rest profile and drive profile of the tuck-in needle are connected via one common groove cam, a power transmission mechanism that transmits the rotation of this drive cam to the tuck-in needle, and this A switching mechanism is provided for selectively linking a cam follower slidingly engaged with the common groove cam of the power transmission mechanism to a rest profile and a drive profile.

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 8, the tuck-in selvedge assembly device 1 shown in this embodiment is roughly equipped with a tuck-in needle 2, a weft end holder 3, and a cutter 4, and is used for reed beating (weaving of pile structure). In this section, the weft yarn 5 that has been beaten during pile formation is cut by the cutter 4 and set to 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, and the cut end of the weft yarn 5 is held by the weft end holder 3. The end of the weft thread 5 stretched between the weft thread 3 and the weaving selvage 6 is captured by the tuck-in needle 2 and drawn into the next warp thread 7 opening.

Here, the tuck-in needle 2 is attached to the reed-side tip of a tuck-in needle shaft 11 attached to the device main body IO, and the tuck-in needle 2 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 7. As a result, the warp threads 7 are moved back and forth in the elongation direction, and are moved to the retracting position shown by the solid line in FIG. 8 and the catching position shown by the imaginary line in FIG. It is designed to move through the intermediate position shown by . The drive device 12 is divided into a reciprocating drive device 20 and a back-and-forth drive device 60.

The reciprocating rotation drive device 20 includes a drive cam 21, a power transmission mechanism 22, a switching mechanism 23, and a vibration isolation mechanism 24.

The drive cam 2 includes 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 is located below the tuck-in needle shaft 2 and the tuck-in needle shaft 1!
It extends in a direction perpendicular to the weft thread 5 and is installed on the left and right walls of the apparatus main body 10 in the direction in which the weft threads 5 extend through bearings 27 .

On the circumferential surface of the drive cam 21, a rest profile 28 and a drive profile 29 of the tuck-in needle 2 are connected via one common groove cam 30.

The resting profile 28 extends from the common groove cam 30 to the cam member 2.
It is a cam groove that does not displace in the direction parallel to the axis of 5. The drive profile 29 is a 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, and has a starting end and a cam groove. The end portion communicates with the resting profile 28 . This drive profile 29 is set based on the amount of displacement from the rest profile 28 required for reciprocating rotation of the tuck-in needle 2, and in this embodiment, the relationship between the required amount of displacement and the groove width of the cam groove is determined. Therefore, one side of the resting profile 28 parallel to the axis of the cam member 25 overlaps to form one wide cam groove.

The power transmission mechanism 22 transmits the rotation of the drive cam 21 to the tuck-in needle 2, and is connected to the pinion gear 3.
1, a rack gear 32, and a cam follower 33, -
It also has a structure that converts the rotation of the drive cam 21 into reciprocating rotation. The pinion gear 31 is coaxially fixed to the tuck-in needle shaft 11, and is meshed with a rack gear 32 that reciprocates below the pinion gear 31 in a direction parallel to the direction in which the weft 5 extends.

The rack gear 32 is fixed to a rack gear base 34''. The rack gear base 34 is slidably engaged with a guide rail 35 fixed to the main body 10 of the apparatus, and a cam follower 33 that is slidably engaged with the drive cam 21 without play is connected to the rack gear base 34 by a pin 36. It is.

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,
It is composed of a spring 40 and a stopper mechanism 41. The spring 40 connects the device main body 10 and the rack gear base 3
4, and urges the cam follower 33 from the rest profile 28 toward the drive profile 29 via the rack gear base 34.

The stopper mechanism 41 is connected to the rack gear base 34 and the device main body l.
It is provided astride a piece 42 fixed to the rack gear base 34, and a movable member 43 attached to the device main body 10 so as to be able to move toward and away from this piece 42. By moving closer to the 42 side, the piece 42
is in contact with the movable member 43, while the movable member 43 is in contact with the piece 42.
By moving further apart, the piece 42 is prevented from coming into contact with the movable member 43. The movable member 43 is moved toward and away from the movable member 43 by a return spring 44 and an electromagnetically driven actuator 45. The return spring 44 is anchored to the movable member 43 and the device main body 10, and urges the movable member 43 in a direction toward the piece 42. The electromagnetic drive type actuator 45 has a solenoid 46 attached to the device main body 10, a plunger 47 of which is connected to the movable member 43 via a link plate 48 and a lever 49, and the solenoid 46 is attached to a shuttleless loom (not shown). When excited by the controller, the plunger 47 moves the movable member 43 in a direction away from the piece 42 against the return spring 44.

The anti-vibration mechanism 24 has a resting profile 28 in this embodiment.
Since the cam follower 33 switches from the rest profile 28 to the drive profile 29 and the tuck-in needle 2 rotates forward and stops at the capture position, since the drive profile 29 and the drive profile 29 are configured in one wide groove. To,
The cam follower 33 moves in a direction parallel to the axis of the cam member 25 due to the inertial force of the tuck-in needle 2 and passes between the drive profile 29 and the rest profile 28, thereby preventing the tuck-in needle 2 from vibrating. . Specifically, the vibration isolation mechanism 24 includes a projecting wall 50 provided on the circumferential surface of the cam member 25 along the drive profile 29 with a required gap, and a cam follower 51 separate from the above-mentioned one provided on the rack gear base 34. cam follower 3
3 switches from the rest profile 28 to the drive profile 29, the cam follower 5I slides into and engages with the outer surface of the projecting wall 50, and the cam follower 51 slides into and engages with the projecting wall 50 and the cam follower 33 described above. It has a structure in which vibration of the tuck-in needle 2 is suppressed by cooperation with sliding contact and engagement with the drive profile 29.

The longitudinal drive device 60 includes a drive cam 61 different from the one described above and a power transmission mechanism 62 different from the one described above.

The drive cam 61 is configured as a grooved cam formed on one end surface of the cam member 25 described above.

The power transmission mechanism 62 transmits the rotation of the drive cam 61 to the tuck-in needle 2, and includes a contact member 63, a link plate 64, a lever unit 65, a cam follower 66, and a support shaft 67.
It also has a structure that converts rotation into forward and backward motion. The contact member 63 is externally fitted onto the rear part of the tuck-in needle shaft 11. In this portion, a groove 68 is formed in the circumferential surface of the tuck-in needle shaft 11 in a closed annular shape. The tip of a pin 69 fixed to the contact member 63 is slid into and engaged with this groove 68 without play. One end of the +i link plate 64 is connected to a bracket provided at the rear of the contact member 63 using a pin 70. The lever unit 65 has a third lever 7 on the circumferential surface of the XIJ-bu 71.
2 and a second lever 73 extending in the radial direction, the sleeve 7! is externally fitted onto the support shaft 67, and the tip of the louver 72 is connected to the other end of the link plate 64 with a pin 74. A pin 75 is connected to the tip of the second lever 73 with a cam follower 66 that slides and engages with the drive cam 61 without play. The support shaft 67 is located parallel to the drive shaft 26 and at the rear lower part of the drive shaft 26,
It is installed across the left and right side walls of the device main body IO.

On the other hand, as shown in Fig. 5.6, the weft end holder 3 is attached to the tuck-in needle shaft on the front wall of the device main body lO! The cylinder body 80 is disposed below l. A receiving recess 81 is formed in the peripheral wall of the cylindrical body 80 and opens across the reed 8 side and a direction parallel to the direction in which the weft 5 extends. A nozzle (not shown) connected to an air pump (not shown) via a flexible vibrator 82 is housed above the receiving recess 81 in the cylinder 80.

The cylinder 80 is attached to a support member 83. This support member 83 is connected to the intermediate portion of the main lever 84 by a pin 85. The main lever 84 is the device main body IO
A pin 87 is connected to a stay 86 protruding from the tuck-in needle shaft 11 toward the reed 8 side and extends downward. A front portion of the second actuating rod 88 protruding from the device main body IO is connected to a portion of the main lever 84 above the connecting portion of the support member 83. Also, the support member 83
The lower end of the sub-lever 89 is connected to a bin 90 on one side. A first actuating rod 91 is attached to the upper end of this sub-lever 89.
The main body of the device! It is connected to the front part that protrudes from 0.

The cutter 4 is disposed outside the weft end holder 3, and is configured as a mechanical type consisting of a lower blade 100 and an upper blade 101. The lower blade 100 is fixed to the lower tip of the main lever 84. The intermediate part of the upper blade 101 is connected to the pin 10 in the intermediate part between the lower blade 100 of the main lever 84 and the pin 85.
2 are connected. A cam follower 104 is connected to a pin 105 at the rear end of the upper blade 101 on the opposite side. This cam follower 104 is slidably engaged with a cam 106 provided on the bottom surface of the device main body IO. A spring 107 is moored across the upper blade 101 and the main lever 84. This spring 107 biases the upper blade 101 so that the cam follower 104 is always in sliding contact with the cam 106.

Here, the above-mentioned first operating rod 91 and second operating rod 89
is connected to the drive shaft 26 by a drive device (not shown) assembled in the device main body IO, and the weft end holder 3 and The cutter 4 moves from the retracted position shown by the solid line in FIG. 8 to the operating position shown by the imaginary line in FIG. The cut end of the weft yarn 5 is engaged with and gripped by the lower edge of the receiving recess 81 by the airflow from the weft. Further, the weft end holder 3 and the cutter 4 in the retracted position are designed not to interfere with the reed 8 which is making a beating motion, as shown in FIG.

Note that the reference numeral 110 shown in FIG. It is a drive cam for the second operating rods 91, 89, and is numbered 11! is a driven pulley consisting of a toothed boolean fixed to the end of the drive shaft 26 protruding from the side wall of the device main body lO, and this is a driven pulley that connects a timing belt to the drive shaft on the loom side that is linked to the main shaft of the shuttleless loom. connected via.

According to the structure of the above embodiment, the drive shaft 26 rotates once for each rotation of the main shaft of the shuttleless loom, that is, for each weaving cycle.
Before the rotation angle of the main shaft reaches the start of the reciprocating rotation of the tuck-in needle 2, that is, the cam follower 33 of the reciprocating rotation drive device 20 is at the rest profile 28 of the drive cam 21 and the starting end of the drive profile 29, as shown by the solid line in FIG. The solenoid 46 is demagnetized by the controller of the shuttleless loom when the cam groove is in the common cam groove before the intersection with the loom. Then, the movable member 43 is moved toward the piece 42 by the elastic force of the return spring 44, and reaches the locking position of the piece 42 as shown by the solid line in FIG. Then, when the drive cam 21 rotates in the direction of the arrow X shown in FIG.
Although the bridge 42 is biased from the resting profile 28 toward the driving profile 29 by the movable member 4
Contact with 3. Subsequent rotation of the drive cam 2 causes the cam follower 33 to be linked to the resting profile 28, as shown by the dash-dotted line in FIG. Then, although the tuck-in needle shaft 11 is moved back and forth in its axial direction by the back-and-forth movement drive device 60, its reciprocating rotation in the circumferential direction is restricted by the contact between the movable member 43 and the piece 42, so that the tuck-in needle 2 only moves back and forth between the retracted position and the intermediate position, the reciprocating rotation of the tuck-in needle 2 about the tuck-in needle shaft 11 is stopped, and the thread taking drive of the tuck-in needle 2 is not performed. The solenoid 46 is demagnetized after the cam follower 33 passes through the intersection B between the rest profile 28 and the end of the drive profile 29 due to the rotation of the drive cam 21.
Released by the controller of the shuttleless loom.

On the other hand, contrary to the above, before the rotation angle of the main shaft of the shuttleless loom reaches the point where the tuck-in needle 2 starts reciprocating rotation, that is, the cam follower 33 of the reciprocating rotation drive device 20 reaches the intersection A as shown by the solid line in FIG. When it is in the front common cam groove 30,
The solenoid 46 is excited and activated by the controller of the shuttleless loom. Then, the movable member 43 moves away from the piece 42 against the return spring 44, and reaches the release position from the piece 42 as shown by the imaginary line in FIG. Then, the rotation of the drive cam 21 progresses in the direction of the arrow X shown in FIG.
When the cam follower 33 has moved to the intersection A, as indicated by the dotted line in the figure, the cam follower 33 is moved from the rest profile 28 to the drive profile 29 by the spring 40 of the switching mechanism 23. Continued drive cam 2
One rotation causes the cam follower 33 to associate with the drive profile 29 as shown in phantom in FIG. As a result, the tuck-in needle 2 is sequentially moved from the retraction position to the intermediate position to the first catching position to the crushing intermediate position to the retraction position by the cooperation of the back-and-forth movement drive device 60 and the reciprocating rotation drive device 20. The ends of the weft threads 5 stretched between the weft threads 3 and the weaving selvedges 6 are caught, turned back, and woven into the next warp thread 7 opening. Moreover, when the cam follower 33 is linked to the drive profile 29 and the tuck-in needle 2 comes to the catching position to take up the yarn, a cam follower 51 different from the above-mentioned one moves against the projecting wall 50 as shown by the imaginary line in FIG. slidingly engages the outer surface of the
Vibration of the tuck-in needle 2 is eliminated by the sliding engagement of the cam follower 51 with the projecting wall 50 and the sliding engagement of the cam follower 33 with the drive profile 29, making it possible to prevent thread take-up mistakes.

Note that the present invention is not limited to the above-described embodiment, and although not shown in the drawings, for example, the movable member 43 may be moved forward and backward in conjunction with the reed 8, or the body+lz pump (2 wheels 28 and drive profile 29 may be moved forward and backward). The common force 11 is divided into two cam grooves via the groove 30, and depending on the case, it can also be applied to the back-and-forth movement drive device 60, and the tuck-in selvedge for the middle selvedge has two tuck-in needles and two weft end holders. It can also be applied to assembly equipment.

Effects of the Invention As described above, according to the present invention, the cam follower is selectively linked to the rest profile and the drive profile of the drive cam by the switching mechanism, so that one groove cam can stop the tuck-in needle without thread take-up, or It can be driven to do so. As a result, there is no need to increase the number of drive cams, and the tuck-in ear assembly device can be made smaller accordingly. Moreover, by activating the switching mechanism when the cam follower is positioned before the intersection of the rest profile and the starting end of the drive profile, the inconvenience that the start of synchronization between the main shaft of the shuttleless loom and the drive profile of the drive cam varies is also resolved. There are novel effects such as the ability to

[Brief explanation of the drawing]

Fig. 1 is a sectional view taken along the line I-■ in Fig. 3 showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line - ■ in Fig. 3, and Fig. 3 is a sectional view of the tuck-in needle shaft. Fig. 4 is an exploded perspective view of the main parts of the embodiment, Fig. 5 is a side view of the embodiment, and Fig. 6 is a view of the embodiment from the reed side. A front view, FIG. 7 is an explanatory view of the operation of the same embodiment, and FIG. 8 is a schematic diagram showing the surroundings of the tuck-in ear assembly device of the same embodiment. DESCRIPTION OF SYMBOLS 1... Tuck-in ear assembly device, 2... Tuck-in needle, 12... Drive device, 20... Reciprocating rotation drive device, 21... Drive cam, 22... Power transmission mechanism, 23... ...Switching mechanism, 28...Destination profile, 29...Drive profile, 30...Common cam groove. Figure 6

Claims (1)

[Claims] A drive cam in which a rest profile and a drive profile of a tuck-in needle are connected via one common groove cam, a power transmission mechanism that transmits the rotation of this drive cam to the tuck-in needle, and the common groove cam of this power transmission mechanism. A tuck-in needle drive device for a tuck-in selvedge assembly device, comprising a switching mechanism that selectively links a cam follower slidingly engaged with a rest profile and a drive profile.