JPH0435430Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a weft length measurement and storage device for a fluid jet loom, and particularly to a weft length measurement and storage device with improved manual operability.

<Prior art> As a conventional weft length measuring and storage device, for example,
The one disclosed in Japanese Patent No. 59-33779 is known.

This system uses a length measuring device to unwind the weft yarn from a yarn feeder at a predetermined speed, and stores it in a drum-type storage device. It includes a held drum and a locking body that is located inside the drum and moves in and out of the drum surface at a predetermined timing. That is, the weft fed out from the length measuring device is locked by the locking body and wound around the drum surface by the rotating yarn guide, and when it is time to insert the weft,
The locking body is retracted into the drum, and the weft is inserted by the fluid jet from the weft insertion nozzle. In this weft insertion process, first the weft thread that was wrapped around the drum flies away, and then when the wrapped weft becomes bad, the weft thread that is fed out from the length measuring device is inserted without being stored on the drum. . Then, the locking body protrudes onto the drum surface, locks the weft yarn, and starts winding it around the drum, thereby completing the weft insertion.

<Problems to be solved by the invention> However, in this case, when the weft is manually pulled out in a state other than the weft insertion phase, the weft is locked in the locking body, so this locking The stopper must be retracted into the drum, but since the drive device for the stopper is located inside the drum, the structure is extremely complex and there is a problem in that the stopper cannot be easily moved. Ta.

In addition, if the length measuring device is a type in which the weft is held between a pair of rollers and the weft is let out at a predetermined speed, when manually pulling out the weft, the pair of rollers must be moved apart in addition to operating the locking body. In this respect, too, there was a problem that manual operability was not good.

The present invention was devised in view of these conventional problems, and an object of the present invention is to facilitate the manual weft drawing operation.

<Means for solving the problem> For this reason, the present invention disposes the locking body and its driving device on the outside of the drum, while forcibly pulling out the locking body from the drum surface in conjunction with manual operation. A release device and a release device that separates the pair of rollers of the length measuring device in conjunction with the manual operation are provided.

<Function> If the locking body is located on the outside of the drum as described above, the locking body can be directly moved by a simple mechanism when the locking body is extracted from the drum surface. Then, in conjunction with the manual operation, the locking body is forcibly pulled out from the drum surface and the pair of rollers of the length measuring device are separated, thereby making it possible to facilitate the manual weft pulling operation.

<Example> An example of the present invention will be described below based on FIG. 1.

In Fig. 1, 1 is a yarn feeder, 2 is a guide, and 3
4 is a tensor, 4 is a length measuring device, 5 is a storage device, 6 is a gripper, and 7 is a weft insertion nozzle.

The length measuring device 4 includes a length measuring roller 9 fixed to a rotating shaft 8 that rotates in synchronization with the main shaft of the loom, and a fixed shaft 10.
A presser roller 12 rotatably pivoted to one end of an L-shaped lever 11 rotatably attached to the lever, and a spring that biases the lever 11 counterclockwise and presses the presser roller 12 against the length measuring roller 9. It consists of 13 and more. Reference numeral 14 includes a push rod 16 driven by an actuator 15, and when the push rod 16 is pushed out, the lever 1 is activated.
1 is a release device that rotates clockwise to separate the presser roller 12 from the length measuring roller 9.

The storage device 5 includes a rotating yarn guide 18 fixed to a rotating shaft 17 that rotates in synchronization with the main shaft of the loom;
A drum 19 is relatively rotatably supported on a rotating shaft 17 and held stationary, a locking body 22 is fixed to one end of a lever 21 rotatably attached to a fixed shaft 20, and a locking body 22 is mounted in synchronization with the main shaft of the loom. Rotating shaft 2 that rotates
3, and a spring 26 that urges the lever 21 clockwise to bring the cam follower 25 attached thereto into contact with the cam 24.
Here, the high part 24H of the cam 24 and the cam follower 2
When the lower part 24L of the cam 24 and the cam follower 25 come into contact with each other, the lever 21 rotates counterclockwise so that the locking body 22 comes out from the circumferential surface of the drum 19. The lever 21 is rotated clockwise so that the locking body 22 enters the circumferential surface of the drum 19. In this way, the locking body 19 and its driving device, such as the lever 21 and the cam 24, are arranged on the outside of the drum 19. 27 is a push rod 29 driven by an actuator 28
This is a release device which rotates the lever 21 counterclockwise when the locking body 22 is projected and extracts the locking body 22 from the circumferential surface of the drum 19.

The gripper 6 consists of a fixed clamp body 30 and a movable clamp body 31 facing the fixed clamp body 30, and a pair of pins 33A, 3 provided on a rod 32 integral with the movable clamp body 31.
3B, one end of a lever 35 rotatably attached to a fixed shaft 34 is inserted, and this lever 35 is biased counterclockwise by a spring 36. A cam follower 37 is pivotally attached to the other end of the lever 35. When a high portion 39H of a cam 39 attached to a rotating shaft 38 rotating in synchronization with the main shaft of the loom comes into contact with the cam follower 37, the lever 35 is moved. The movable clamping body 31 is separated from the fixed clamping body 30 by being rotated clockwise, and the lower part 39L of the cam 39 is moved to the cam follower 3.
7, the lever 35 rotates counterclockwise so that the movable clamp holder 31 comes into pressure contact with the fixed clamp holder 30. Reference numeral 40 denotes a release device which includes a push rod 42 driven by an actuator 41 and rotates a lever 35 clockwise to separate the movable clamp 31 from the fixed clamp 30 when the push rod 42 is pushed out.

The actuators 15, 28, 41 are activated by closing the release switch 43 (the push rod 1 is closed).
6, 29, and 42) and become inoperable when the switch 44 is closed.

After the weft yarn W is pulled out from the yarn feeder 1, it is passed through a guide 2 and a tensor 3, then passed between a length measuring roller 9 and a presser roller 12, and then passed through a rotating yarn guide 18 and then passed through a drum. 19, and then the guide 45, the fixed clamp holder 30 and the movable clamp holder 3.
2, and further through the weft inserting nozzle 7.

Next, the operation will be explained with reference to FIG.

In the length measuring device 4, the weft W is held between a length measuring roller 9 and a presser roller 12, and is let out at a predetermined speed by the rotation of the length measuring roller 9. At this time, the tensioner 3 provides resistance to the pull-out.

In the storage device 5, the weft W is wound around the drum 19 by the rotating yarn guide 18 while the locking body 22 is inserted into the surface of the drum 19 to lock the tip of the weft W.

When it is time to insert the weft, fluid is first injected from the nozzle 7 to stretch the tip of the weft W straight ahead of the nozzle 7. Next, the high portion 39H of the cam 39 comes into contact with the cam follower 37, and the movable clamp 31 separates from the fixed clamp 30, releasing the weft W. Next cam 2
4 comes into contact with the cam follower 25, the locking body 22 is pulled out from the surface of the drum 19, and the weft W
is unlocked. As a result, first drum 1
The weft yarn W stored above 9 is inserted in free flight. After all of the stored wefts W are inserted, the wefts W let out from the length measuring device 4 are inserted in a length measuring flight without being stored on the drum 19. During this process, fluid injection from the nozzle 7 is stopped. Next, at almost the same time, the lower part 24L of the cam 24 faces the cam follower 25, and the lower part 39L of the cam 39 faces the cam follower 37, the locking body 22 rushes into the surface of the drum 19, and the movable clamping body 31 moves against the fixed clamping body. The weft W is pressed against the weft 30 and held there. As a result, the weft thread W is wound around the drum 19 as soon as the insertion of the weft thread W is completed, and the above-described operation is repeated.

When the weft W is manually pulled out while the loom is stopped, the release switch 43 is closed. This causes the actuators 15, 28, 41 to operate, and the push rods 16, 29, 42 to protrude. Due to the protrusion of the push rod 16, the lever 11 is rotated clockwise and the presser roller 12 is separated from the length measuring roller 9. Further, due to the protrusion of the push rod 29, the lever 21 is rotated counterclockwise, and the locking body 22 is pulled out from the surface of the drum 19. Further, due to the protrusion of the push rod 42, the lever 35 is rotated clockwise, and the movable clamping body 31 is moved from the fixed clamping body 30 to the fixed clamping body 30.
move away from Therefore, the weft W from the nozzle 7 side
When the weft yarn W is pulled, the weft yarn W is released in the length measuring device 4, the storage device 5, and the gripper 6, so that it can be freely pulled out from the yarn supplying body 1. After the weft W has been drawn out, the switch 44 is closed and the actuators 15, 28, 41 are inactivated, so that the weft W is transferred to the measuring roller 9 and the presser roller 1.
2, and the locking body 22 is held between the drum 19
The weft yarn W is inserted into the surface, and the weft W is further sandwiched between the fixed clamping body 30 and the movable clamping body 31.

<Effects of the invention> As explained above, according to the invention, since the locking body and its driving device are disposed outside the drum, the locking body can be taken in and out of the drum with a simple mechanism, and furthermore, In conjunction with manual operation, the locking body is forcibly pulled out from the drum surface, and at the same time the pair of rollers of the length measuring device are separated, making it easier to manually pull out the weft yarn. is obtained.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing one embodiment of the present invention;
The figure is a diagram showing operation timing. 1... Yarn feeder, 4... Length measuring device, 5... Storage device, 6... Grip device, 7... Weft insertion nozzle, 9...
Length measuring roller, 11... Lever, 12... Presser roller, 14... Release device, 15... Actuator, 18... Rotating yarn guide, 19... Drum, 21... Lever, 22... Locking body, 24...
cam, 27... release device, 28... actuator, 30... fixed clamp body, 31... movable clamp body,
35... Lever, 39... Cam, 40... Release device, 41... Actuator, 43... Release switch.

Claims (1)

[Claims for Utility Model Registration] A length measuring device 4 that pinches a weft yarn between a pair of rollers 9 and 12 and lets it out at a predetermined speed, and a drum held in a stationary state around which the let-out weft yarn is wound. 19; and a locking body 22 that moves in and out of the drum surface at a predetermined timing to regulate winding of the weft around the drum and insertion of the weft, the locking body 22 and its driving device are disposed outside the drum 19, while a release device 27 for forcibly extracting the locking body 22 from the drum surface in conjunction with the manual operation, and a release device 27 in conjunction with the manual operation to forcibly extract the locking body 22 from the drum surface; A weft length measurement and storage device for a fluid jet loom, characterized in that a release device 14 is provided for separating rollers 9 and 12.