JPH0233352A - Tuck-in needle driving apparatus of tuck-in selvedge device - Google Patents

Abstract

PURPOSE:To attain excellent high-speed follow-up performance by selectively guiding a cam follower to a shallow groove and a deep groove corresponding to each profile of the pause and the drive of a tuck-in needle formed on a cylindrical groove cam in parallel and, at the same time, converting the motion of said cam follower to the motion of needle. CONSTITUTION:A cylindrical groove cam 20 rotating synchronously with the main shaft of a loom is provided with a shallow groove 21 having the form of a straight ring corresponding to the pause profile of a tuck-in needle and with a deep groove 22 corresponding to the driving profile of the tuck-in needle parallel to the shallow groove. The apparatus is further provided with a switching mechanism 33 to restrict and control the insertion depth of a cam follower 23 to said cylindrical groove cam 20 and selectively guide the cam follower 23 to the shallow groove 21 or the deep groove 22. The motion of the cam follower 23 in the direction of the rotational center line of the cylindrical groove cam 20 is converted to the reciprocating rotational motion of the tuck-in needle by power transmission mechanisms 26, 27, 28. The driving and pause of the tuck-in needle can be performed with single drive cam by the above mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tuck-in needle drive device for a tuck-in selvedge assembly device.

<Prior art> The tuck-in needle drive device of the tuck-in selvedge device is
Basically, the 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 also rotates the tuck-in needle around the needle shaft. The tuck-in selvedge assembly device rotates back and forth 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 insert it into the warp opening.

In addition, in order to tuck in a pile structure such as a towel, the forward position of the reed differs between the pile forming reed and the blind reed due to terry motion. Since the tying device must be moved and lacks high speed, it is possible to drive the tuck-in needle to take up threads every multiple weaving cycles and bundle the ends of multiple weft yarns without moving the tuck-in selvedge tying device. It is designed to tuck in. For this reason, a mechanism is provided to stop the drive by the drive cam (see Japanese Patent Laid-Open No. 130349/1983).
.

<Problems to be Solved by the Invention> However, the conventional stopping mechanism is a mechanism in which a cam follower that follows the drive cam is urged by a spring is retracted by another cam, and because it uses a spring, high-speed There was a problem that it lacked followability and could not cope with higher speeds of looms.

In view of these conventional problems, an object of the present invention is to provide a tuck-in needle drive device for a tuck-in selvedge assembly device that can drive and pause the tuck-in needle with one drive cam and has excellent high-speed followability. .

<Means for Solving the Problems> For this reason, the present invention provides a cylindrical grooved cam that rotates in synchronization with the rotation of the loom main shaft, a straight annular shallow groove along the rest profile of the tuck-in needle, and a part thereof. A switching mechanism that selectively guides the cam follower to these grooves by arranging a tack that shares the cam and a deep groove along the drive profile of the in-needle, and regulating and controlling the amount of thrust of the cam follower into the cylindrical groove cam. and a power transmission mechanism for converting the movement of the cam follower in the direction of the rotation center line of the cylindrical groove cam into reciprocating rotation of the tuck-in needle, thereby configuring a tuck-in needle drive device of the tuck-in selvedge assembly device.

In the above configuration, by regulating the amount of protrusion of the cam follower using the switching mechanism and guiding the cam follower into the shallow groove of the cylindrical groove cam, the tuck-in needle can be stopped, and the tuck-in needle can be stopped without regulation. If the tuck-in needle is guided into the deep groove of the cylindrical grooved cam, the tuck-in needle can be driven by reciprocating the tuck-in needle by using the movement of the cam follower at this time via a power transmission mechanism.

<Example> Embodiments of the present invention will be described below based on the drawings.

Referring to FIG. 3, the tuck-in selvedge assembly device 1 includes a tuck-in needle 2, a weft end holder 3, and a cutter 4, and is equipped with a reed 8 for reed beating (in the case of pile weaving, reeding during pile formation). At the same time, the cut end of the weft 5 is held by the weft end holder 3, and the cut end of the weft 5 is cut by the cutter 4 to set the required weft insertion length.
Tuck the end of the weft yarn 5 stretched between the tuck-in needle 2
The warp is caught by the warp and inserted into the 70th warp opening while being folded back.

Here, the tuck-in needle 2 is attached to the downstream end of a needle shaft 11 attached to the device main body 10, and is moved back and forth in the warp 7 elongation direction by the back and forth movement of the needle shaft 11 in the axial direction. The reciprocating rotation of the shaft 11 in the circumferential direction causes the weft 5 to reciprocate in the elongation direction.

FIGS. 1 and 2 show the drive mechanism within the device main body 10. FIG.

The needle shaft 11 is supported by the device main body 10 so as to be slidable and rotatable in the front-rear direction.

The drive mechanism for moving the needle shaft 11 back and forth is a cam groove (not shown) formed on the side surface of a drive cam 13 fixed to a drive shaft 12 that rotates in synchronization with the machine shaft. A cam follower (not shown) in the middle of the freely movable lever 16 is guided, and the swinging movement of the lever 16 is transmitted to the needle shaft 11 via a joint (not shown).
The configuration is such that the needle shaft 11 is moved back and forth by transmitting the power to the needle.

Next, a drive mechanism for reciprocating the needle shaft 11 will be explained.

A cylindrical groove cam 20 is formed on the circumferential surface of the drive cam 13. This cylindrical grooved cam 20 has a straight annular shallow groove (hereinafter referred to as shallow groove) 21 along the rest profile of the tuck-in needle, and a deep groove (hereinafter referred to as deep groove) along the drive profile of the tuck-in needle that shares a part with the straight annular shallow groove 21 (hereinafter referred to as shallow groove). )2
2 are installed in parallel.

A cam follower 23 is guided in these grooves 21,22.

The power transmission mechanism converts the movement of the cam follower 23 into reciprocating rotation of the tuck-in needle 2. The cam follower 23 is supported at the tip of a shaft 24, and this shaft 24 is connected to a slider guided by a guide rail 25. 26 in a slidable manner.

A rack gear 27 is fixed to the slider 26 in the sliding direction thereof, and meshes with a pinion gear 28 fixed to the intermediate portion of the needle shaft 11. The slider 26 is urged downward in FIG. 1 by a spring (not shown).
The cam follower 23 is to be brought into contact with the side surface of the shallow groove 21.

Also, a bracket 29 is fixed to the end of the shaft 24 of the cam follower 23, and this bracket 29 is attached to the needle shaft 1.
It is fixed to the bushing 30 on top of 1. The bushing 30 is movable on the needle shaft 11 between the end surface of the pinion gear 28 of the needle shaft 11 and the end surface of the bearing part of the device main body IO,
It is biased by a spring 31 in a direction in which it is pressed against the end face of the binion gear 28.

The switching mechanism selects and links the cam follower 23 of the power transmission mechanism to the shallow groove (rest profile) 21 and deep groove (drive profile) 22 of the cylindrical groove cam 20.

That is, the piece 32 is fixed to the bracket 29, and this piece 3
A stopper 33 is provided so as to be able to move toward and away from 2. Here, by moving the stopper 33 closer to the piece 32 side, the piece 32 comes into contact with the stopper 33, while by moving the stopper 33 away from the piece 32, the piece 32 does not come into contact with the stopper 33. . The movement of the stopper 33 toward and away from the stopper 33 is performed by an electromagnetically driven actuator (not shown).

Next, the action will be explained.

Drive shaft 1 for each rotation of the loom main shaft, i.e. for each weaving cycle.
2 rotates once, but before the rotation angle of the main shaft reaches the point where the tuck-in needle 2 starts reciprocating rotation, the needle shaft 11 retreats and the bush 30. Bracket 29 and shaft 24
The cam follower 23 is pulled out from the cylindrical groove cam 20 through the cam 20, and is placed in a position corresponding to the shallow groove 21. Further, since the slider 27 is biased by a spring, the cam follower 23 comes into contact with the side surface of the shallow groove 21. At this time, the actuator is demagnetized by the control unit.

Then, the stopper 33 moves toward the piece 32 and becomes the locking position of the piece 32. Therefore, even when the needle shaft 11 moves forward, the amount of protrusion of the cam follower 23 is regulated so that it corresponds to the shallow groove 21, and in this state, it comes into contact with the side surface of the shallow groove 21 by the spring.

Therefore, although the needle shaft 11 moves back and forth in its axial direction by the back and forth drive mechanism, the cam follower 23 is regulated by the shallow groove (rest profile) 21 of the cylindrical groove cam 20.
As a result, 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 needle shaft 11 is stopped, and the thread-taking drive of the tuck-in needle 2 is not performed. .

On the other hand, contrary to the above, when the control unit excites the actuator, the stopper 33 moves between the pieces 32 and 32.
It moves further away and reaches the release position from the piece 32.

Therefore, when the needle shaft 11 moves forward, the spring 31
The shaft 2 together with the bushing 30 etc.
4 advances, the cam follower 23 enters the deep groove 22 of the cylindrical groove cam 20 and is guided by this deep groove 22. That is, the cam follower 23 is moved from the rest profile to the drive profile by the switching mechanism.

As a result, the tuck-in needle 2 is moved sequentially from the retracted position → intermediate position → capture position → intermediate position → retracted position by the cooperation of the back-and-forth drive mechanism and the reciprocating rotation drive mechanism, and is connected to the weft end holder 3 and the weave. The ends of the weft yarns 5 stretched between the selvedges 6 are woven.

In the above embodiment, the back and forth movement of the needle shaft 11 is used to automatically return the cam follower 23 to the deep groove 22.
Although it has been described above that it is extracted from the shallow groove 21, the following configuration may also be adopted.

FIG. 4 shows a structure in which the cylindrical groove cam 20 is automatically returned to its original position due to the cam shape (circumferential shape) of the deep groove 22.

In FIG. 5, a side cam 41 is provided on the side of a cylindrical groove cam, and a cam follower 23 is attached via a lever 42 and a joint 43.
The configuration is such that it automatically returns.

<Effects of the Invention> As explained above, according to the present invention, the switching mechanism regulates and controls the plunge amount of the cam follower to select between the shallow groove and the deep groove of the cylindrical groove cam, thereby making it possible to tuck-in needle with one drive cam. It is possible to obtain a tuck-in needle drive device that can drive and pause the tuck-in needle and has excellent high-speed followability.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a tuck-in needle drive device showing an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a schematic plan view of the tuck-in selvedge device, and FIGS. 4 and 5. FIG. 3 is a front view of a main part of a tuck-in needle drive device showing other embodiments. 1... Tuck-in selvage assembly device 2... Tuck-in needle 3... Weft end holder 4... Cutter 10... Device body 11... Needle shaft 12
... Drive shaft 13 ... Drive cam 20 ... Cylindrical groove cam 21 ... Shallow groove (rest profile) 22.
...Deep groove (drive profile) 23...Cam follower
24...Shaft 25...Guide rail 26
...Slider 27...Rack gear 28...
・Pinion gear 29...Bracket ・30...
Bush 31... Spring 32... Piece 3
3... Stopper patent applicant Nissan Motor Co., Ltd. Representative Patent attorney Fujio Sasashima Figure 4 Figure 5

Claims (1)

[Claims] A cylindrical grooved cam (20) that rotates in synchronization with the rotation of the loom main shaft.
A straight annular shallow groove (21) along the rest profile of the tuck-in needle and a deep groove (22) along the drive profile of the tuck-in needle sharing a part thereof are arranged side by side in the cylindrical groove cam. Cam follower (23) for (20)
These grooves (21
, 22) selectively guides the cam follower (23), and a power converting the movement of the cam follower (23) in the direction of the rotation center line of the cylindrical groove cam into reciprocating rotation of the tuck-in needle (2). A tuck-in needle drive device for a tuck-in selvedge device, characterized in that a transmission mechanism (26, 27, 28) is provided.