JPS59125945A - Apparatus for measuring length of weft yarn in shuttleless loom - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weft length measuring device for a shuttleless loom, such as a fluid jet loom.

In general, shuttleless looms, and in particular in fluid jet looms, a weft length measuring device is provided for measuring and storing a required length of weft for one weft insertion in advance. As this type of weft length measuring bag device, there is a so-called pipe type weft length measuring device in which the weft is carried by an air flow P and stored in a storage pipe. However, this pipe-type weft length measuring device has a relatively large resistance when pulling out the weft from the storage pipe during weft insertion.

In addition, since the weft is inserted into the storage pipe using air, it is possible to accurately insert the weft of the required length in one weft insertion.
This has the disadvantage that the weft insertion operation becomes unstable and weft insertion errors are likely to occur.

In order to solve the above-mentioned defects of the pipe-type weft length measuring device, the weft supplied from the weft supply section is continuously wound in a coil shape on the circumference of the weft storage drum, and this winding is performed during weft insertion. A drum-type weft length measuring device has been proposed which is F-strained to pull out the taken weft. This weft length measuring device is provided with a pair of weft locking bodies that can be retracted and retracted from the circumferential surface of the weft storage drum for controlling the winding amount and withdrawal of the weft.

The weft locking body provided in this kind of conventional drum-type weft length measuring device is configured to move in and out of the drum by swinging along a plane perpendicular to the axis of the drum. Of the wefts wound into a coil shape on the surface, the weft of the -th turn remains locked until the moment when the weft locking body sinks into the drum, and the wefts from the second spring onward are -Tendency t' of moving over the weft of the winding to the weft pulling direction? -Yes. This has the disadvantage that the weft threads become tangled, which impedes the weft insertion function. Further, the drum t has a long hole formed in the circumferential direction so that the weft yarn locking body can move in and out of the drum. Since the weft yarn on the circumferential surface of the drum after the second spring is located inside the drum in the radial direction, the moment when the weft yarn locking body sinks into the drum, The weft yarns after the first turn tend to move over the weft yarns of the second turn, which has the disadvantage that the weft yarns tend to get tangled, which impairs the weft insertion function.

The present invention aims to eliminate the defects of the conventional device as described above.
The purpose of this invention is to provide a weft length measuring device that smoothly releases the weft without getting it entangled and is more durable.

An embodiment embodying the present invention will be described below with reference to the drawings. A rotating body 3 having a thread introduction hole 2 is supported by a bearing 4F on a frame 1 located on the side of the loom table of the loom. The rotating body 3 has a pulley 5 fixed at one end thereof, and is rotated by a belt 61 in synchronization with the operation of the loom. Also, the other end of the rotating body 3 has a thread introduction hole 2.
A thread-wrapped tube 8 having a passage 7 communicating with is fixed. A bracket 10 with a shaft 9 and a 7-lung flange extending concentrically from the rotating body 3 is rotatably supported by a metal 11, and the 7-rungs of the bracket 10 are connected to a circular side wall 12 and a support plate. 13 is fixed from the port 14r. This side wall 12 is equipped with a cylinder 15 whose front face is closed and a helad member 16 integrated into the notch of the cylinder 15. Furthermore, a groove 17 is carved in a part of the periphery for attachment of several stripes. In the winding forming part of the weft measuring drum, an arcuate member 19 having a pin 18 is fixed by a port 20 so as to be adjustable in radial position. Therefore, this allows the weft length measurement amount to be changed. A magnet 21 is attached to the support plate 13, and due to the attraction force e of the magnet 23 attached to the support plate 221 on the frame 1 side, sandwiching the rotation locus of the thread-wound thin tube 8, the cylinder 15. The length measuring drum consisting of the slope member 16 and the winding bottle 18 is maintained in a stationary state.

On the other hand, the tip of the shaft 9 protruding inside the cylinder 15 is supported by a bracket 241 that is integral with the cylinder 15, and is also supported by a gear 25.
is fixed, and the supporting shaft 26 is fixed to the same bracket 24).
It meshes with the upper gear 27. Also, the gear 28 on the coaxial 26
meshes with a gear 31 that is integrally formed with a cam 29, 30 that is single-bearing on the shaft 9. Inside the cylinder 15 are swing arms 32 and 33 that are biased by a spring 45.
The cam followers 34 and 35 are in contact with the cams 29 and 30, and are oscillated in different phases.

The ends of the swing arms 32 and 33 are fixed shafts 46, respectively.
°47 and link 36.37 are connected, and link 36.37 is connected.
37 is a member 43 and 44 to which the weft locking bodies 38 and 39 are fixed.
It is connected with. The weft locking bodies 38 and 39 are slidably fitted into the guide members 40 and 41 removed from the head member 161, and move in and out of the surface of the head member 16 as the cams 29 and 30 rotate. In addition, the cylinder 15 is the weft thread member 11
Since the entry/exit position of the guide member 38, 39 is in a sealed state from the guide member 40, 41P, the intrusion of fluff, etc. is prevented, and the drive mechanism installed inside the cylinder 15 is maintained in a good state. can do. In addition, a space 42 is formed by slightly cutting out the area around the protruding and retracting positions of the weft yarn locking bodies 38 and 39, thereby allowing the weft to smoothly transition from the locking body 39 side to the 38 side without becoming tangled. can be made to do this.

In the above configuration e, when the thread winding tube 8 is rotated by the driving force t of the belt 6, the weft thread is sequentially wound onto the length measuring drum. Since the cams 29 and 30 are simultaneously rotated via the gears 25, 27, 28 and 31, for example, when the cam follower 34 reaches the upper part of the cam 29 as shown in FIG. When the lever 32 is pushed up, the weft thread locking body 38 is slid within the guide member 40 by the link 36, and can protrude above the head member 16 to lock the weft thread.

Next, as shown in Figure 4, the cam follower 34 is
9, the swinging lever 32 rotates downward, and the link 361 causes the weft locking body 38 to engage the guide member 40.
It is slid downward inside, releasing the weft threads.

Therefore, the weft locking bodies 38, 39 are given movement by the links 36, 37e, and the movement direction is regulated and guided by the guide members 40, 41e, so that they are given a linear movement. In particular, it is possible to eliminate the problem of conventional devices in which the locking body tends to catch the weft when descending to release the weft.

FIG. 5 shows an application example of the present invention, and in particular, only the mechanism on the weft locking body 38 side is schematically shown. In this example, an elongated hole 48 is bored at the tip side of the swing lever 32, and a link 36 is formed in this hole.
The fixed shaft 46 is fixed. Therefore, link 3
If the fixing position of the fixed shaft 46 of No. 6 is fixed at the imaginary line, and the tip end side of the swing lever 32 is fixed, even if the same cam 29 is used, the protruding height of the weft yarn locking body 38 will be as shown in the imaginary line. The assembly of the length measuring device can be changed depending on the time and type of thread.
- Changes and adjustments can be made easily.

In the above embodiment, 16 head members are provided with the guide members 40 and 41, but the guide members 40 and 41 are
．． 41 is disposed inside the cylinder 15, and a long hole or the like is formed at the position where the weft locking body of the head member 16 appears and disappears. You can also strain it.

Alternatively, a weft length measuring device may be used in which a single weft locking member measures and stores a required length of weft for weft insertion.

As described above, the present invention connects the weft thread locking body to the rocking lever t which is swung by a cam in the length measuring drum through the link e, and also provides a guide portion for slidingly guiding the weft thread locking body. As a result, it is possible to make one weft locking body perform a linear motion with a simple structure, so that the weft locking and releasing movements can be performed smoothly, and the durability of the single mechanism can be imparted. can. Furthermore, because of the link connection, even if the number of weft locking bodies increases as in the case of one-way mixing, their positions and directions can be set freely, and they can be easily disposed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a sectional front view of a weft length measuring device, Fig. 2 is a sectional side view of Fig. 1, and Figs. 3 and 4 show the operation of the present invention. FIG. 5 is a schematic diagram illustrating another embodiment of the invention. 15: Cylinder 18: Winding bin 29. 30: Cam 32. 33: Swing lever 36. 37: Link 38. 39' Weft locking body 40. 41: Guide member Patent applicant Toyota Industries Corporation 21 No. 2 Figure R 717 Figure 5 s3 Figure 4

Claims (1)

[Scope of Claims] The present invention includes a weft locking body that allows the weft supplied from the weft supply section to be wound sequentially onto the length measuring drum and that separates and regulates the weft needed for one weft insertion from other wefts. In the weft length measuring device which performs weft insertion by releasing the weft thread locking body during weft insertion, the length measuring drum is provided with a guide portion that allows the linear protrusion and retraction movement of the weft thread locking body. , a cam that rotates in synchronization with the operation of the loom and a swinging lever that swings from the cam are arranged in the same drum,
A weft length measuring device for a shuttleless loom, characterized in that the base of the weft locking body and the swing lever are connected through one link.