JPS59144650A - Weft yarn length measuring apparatus in fluid jet type 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] Technical Field The present invention winds a weft supplied from a weft supply section to a weft length measuring section forming a thread winding surface, and when inserting the weft, this winding is performed.
J is a fluid-jet loom that prevents the weft from being pulled out.
This invention relates to a hub weft length measuring device.

BACKGROUND OF THE INVENTION In general, fluid jet looms are provided with a weft sub-length device for measuring the length of a weft for one weft insertion in advance and temporarily storing the measured weft. This type of weft sub-lengthening device winds and measures the length of the weft supplied from the weft supply section, temporarily stores the measured IA yarn, and then pulls out the weft that has been wound and stored when inserting the weft. A weft length measuring device has been proposed.

This wrapping type weft length measuring device will be explained based on FIG. 1. Reference numeral 1 denotes a bracket fixed to the side frame 2 of the loom, and a gear 1a is integrally attached to the front side (right side in FIG. 1) of the bracket. It is formed.

Reference numeral 3 denotes a support arm fixed to the upper part of the bracket 1, and has a hanging arm 3a facing the bracket 1. Reference numeral 4 denotes a rotation support shaft rotatably attached to the bracket 1 and the hanging arm 3a, and a weft guide hole 4a that guides the weft Y supplied from a weft supply section (not shown).
is located on its axis. Reference numeral 5 denotes a toothed pulley fixed to the support shaft 4, and 6 a timing and bell l- hung on the pulley 5, which are driven in synchronization with the weaving operation and rotate the rotary support shaft 4. It is something.

Reference numeral 7 denotes a support body located in front of the gear 1a and fixed to the rotation support shaft 4, and 8 a thread-wrapped tube provided on the support body 7 so as to communicate with the weft guide hole 4a of the rotation support shaft 4. The opening at the tip thereof is located above a first tapered circumferential surface 10a of the drum 10, which will be described later. Reference numeral 9 denotes a bracket which is fixed to the support shaft 4 so as to be relatively rotatable at the front side of the support body 7. A gear 9a is integrally formed on the circumferential surface of the bracket, and a weft thread is attached to the front surface of the bracket. A drum 10 as a length measuring member is fixed. Reference numeral 11 denotes a planetary gear mechanism fixed to the support 7, in which an input planetary gear 11a is meshed with the gear 1a, and an output planetary gear 11b is meshed with the gear 9a.

The gear ratio between gear 1a and input planetary gear 1.1a is gear 9.
The ratio of the number of teeth between a and the output planetary gear 1b is set to be the same. Therefore, when the timing belt 6 is driven and the rotation support shaft 4 is rotated, the thread-wound tube 8 rotates together with the support shaft 4, and the planetary gear 1. ．． 1'1 also rotates together, and the double-way star gears 11a and iib are gears 1a and 9a.
The drum 1 revolves around the rotation support shaft 4 while meshing with the drum 1.
0 is held stationary without rotating.

Reference numeral 12 indicates a first weft locking body located on and retracting from the first tapered circumferential surface 10 a of the drum 10 , and 13 indicates a second tapered circumferential surface 10 of the drum 10 . The 211th thread locking body is located at point b and is retracted, and both locking bodies 12 and 13 are moved in and out by a cam mechanism linked to the rotation support shaft 4.

Reference numeral 14 indicates a plurality of (only one is shown in the drawing) weft winding amount adjusting ronds as weft length measuring units installed between the flange portion 15 and the second taper periphery 10b, and which are connected to the drum 10.
It is located below the drum 10 and is arranged approximately radially around the rotation support shaft 4, and its position can be adjusted in the radial direction of the drum 10.

60 is a guide member for guiding the weft yarn Y drawn out from the drum 10, 61 is a slay, and 62 is a main nozzle mounted on the slay.

When the timing belt 6 is driven in synchronization with the weaving operation and the bobbin winding tube 8 rotates around the stationary drum 10, the weft thread is passed from the weft supply section through the weft guide hole 4a and the bobbin winding tube 8. The weft yarn Y supplied by
The length is measured by winding it on the adjustment screw 14. When the weft Y is wound and measured by the length of one weft insertion, the first. The weft thread locking body 12 is sunk into the drum 10, and the weft thread Y whose length has been measured is wrapped around the drum 10.
transitions from the first tapered peripheral surface 10a to the second tapered peripheral surface 1ob. Then, the weft yarn Y that has moved to the second taper circumference 101) is stopped by the second weft locking body 13 in a protruding state, and the weft Y has moved to the second taper circumference 101). It is once wound around Ob and the adjustment rod 14 and stored.

This wrapped and stored weft Y is retracted by the second weft locking body 13 in synchronization with the weft insertion timing, and when fluid is jetted from the weft main nozzle 62, it is pulled out from the drum 10 and placed on the slay 61. A large number of weft guide pieces (
The weft is inserted into a guide passage formed by a weft (not shown).

By the way, when the weft yarn Y moves from the first tapered circumferential surface 10a to the second tapered circumferential surface 10b, the diameter of the yarn winding surface formed by the drum 1O and the adjusting rod 1-14 becomes smaller, so that this winding is reduced. The weft yarn Y that is attached will become loose. Generally, the jetting from the main nozzle 62 is started when the second weft locking body 13 sinks into the drum 10. Therefore, the weft yarn Y, which is wound in a relaxed state on the drum 10
The weft Y is pulled out from the drum 10 by the fluid jetted from the main nozzle 62 before weft insertion starts, and the tip of the weft Y is blown out from the main nozzle 62.

As a result, the timing at which the weft yarn Y is inserted into the opening formed by the warp yarns (not shown) is shifted, and there is a fear that the tip of the weft yarn Y may be caught by the warp yarns.

Even when the tip of the weft Y is not caught by the warp, the tip of the weft Y tends to spread out without going straight due to the jetted fluid from the main nozzle '62, so that the guide path formed by the weft guide member There was a fear that it would not be hooked inside.

In addition, after the inserted weft yarn is beaten and cut by a cutter (not shown), if the number of windings of the weft Y against the yarn winding surface is small, the winding of the yarn winding tube 8 is In J5, the tip of the weft yarn Y came off from the main nozzle 62 due to the tension of the weft yarn Y caused by the operation.

Furthermore, in this conventional device, the tension of the weft yarn Y is not controlled by an appropriate method, so when the tension of the weft yarn Y is weak, there is a risk that the weft yarn will not be reliably cut during beating. Even when the tension of the beaten weft yarns is weak, the tension of the warp yarns at the end of the woven fabric on the side of the main nozzle 62 decreases, causing the defect that the edge of the woven fabric becomes loose.

In order to eliminate such defects, it is possible to provide a weft gripping device between the weft length measuring device and the main nozzle, but
This causes an increase in costs.

Purpose The present invention has been made in consideration of the above facts,
The purpose of this is to appropriately control the posture of the weft tip at J5 during weft insertion, to prevent string insertion errors, and to appropriately control the tension of the weft, which in turn allows the weft from the main nozzle to To provide a weft length measuring device for a fluid injection type loom, which can prevent the cloth edge from coming off or loosening of the weaving li, and can further prevent mistakes in cutting the weft.

Embodiment Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. 2 to 4. Parts that are the same as those in the conventional structure will be denoted by the same reference numerals, and detailed explanation thereof will be omitted.

Attached to the front surface of the bracket 9 is a drum 16 serving as a weft length measuring member similar to the conventional structure described above. Inside the drum 16 are a weft locking member 17 that can be retracted from the inclined portion 16a. Can appear from the horizontal part 16b', 'K 1? i
! A lozenge retainer locking rest 18 is provided.

A plurality of adjustment rods 21 each fixed to a plurality of support stands 20 are provided on one flange portion of the ram 1G so that the position thereof can be adjusted in the radial direction of the drum 16 along the kite'ttl+19a. There is. On the front surface of the bracket 1, there is a cover 22 that covers rotating parts such as the bobbin tube 8.
A plate spring 23 is fixed to the upper outer periphery of the cover 22 with screws 24. The tip of the leaf spring is bent d3 so that it can come into close contact with the flat end of the weft gripper 18, and when the gripper 18 is in the extended state, the tip of the leaf spring 23 is bent. The tip of the gripping and locking body 18 comes into contact with it.

Next, a mechanism for moving the weft thread locking body 17 and the weft gripping body 18 in and out of the drum 16 will be explained. A cam plate 26 corresponding to the plate 25 and the weft gripping member 18 is attached. It is slidable in the vertical direction along the guide cylinder 31 and has a pressing spring 32.
As the first cam plate 25 rotates, the weft thread locking body 17, which is urged downward by
The drum 16 is moved in and out by a lever 28 which is vertically swung around a shaft 27 via a lever 9 . Similarly, as the second cam plate 26 rotates, the weft gripping member 18, which is slidable downward along the guide tube 37 and is urged downward by the pressure spring 38, moves on the cam surface of the second cam plate 26. The second shaft is swung up and down about the shaft 33 via the rolling rotor 35.
It is mounted so that it can be moved out and out of the drum 16 by a lever 34. The timing of the appearance and retraction of the weft locking body 17 and the weft gripping and locking body 18 is the same as that of the 1.21# yarn locking body 12. in the conventional configuration. It is set with the same relationship as the appearance timing in '13.

Next, the operation of the embodiment configured as described above will be explained.

Now, in a state in which the weft thread locking body 17 protrudes from the inclined portion 16a and the weft thread gripping and locking body 18 is recessed from the horizontal portion 16b (see Figure 24), the weft thread locking body 17 and the weft gripping locking body The weft yarn Y, which has been wound and stored between the body 18 and the weft body 18, is pulled out from the drum 16 by the fluid jetted from the main nozzle 62 in synchronization with the weft insertion timing, and is inserted into the weft. = Weft insertion is completed near J. That is, the weft Y is in the weft locking body 17 in the protruding state.
It is locked by the drum 16 and will not be pulled out from the drum 16. In this state, the weft yarn Y passes between the tip end surface of the weft yarn gripping member 18 and the tip end portion of the leaf spring 23.

When the rotation angle of the loom is around 310 degrees, the weft gripping and locking body 1
8 protrudes from the horizontal portion 16b, and the weft Y passing between the gripping and locking body 18 and the leaf spring 23 is inserted between the tip surface of the weft gripping and locking body 18 and the tip of the leaf spring 23. It is lightly grasped. Subsequently, the weft yarn locking body 17 sinks into the drum 16 with a slight delay, and as a result, the weft yarn Y, which had been wound around the inclined portion 16a while being locked by the weft yarn locking body 16, moves to the horizontal portion 1.
6b side, and is locked by the weft gripping locking body 18. Then, the inserted weft yarn is beaten, and is lightly gripped by the cloth end weft gripping locking body 18 on the side of the main nozzle 62 of the woven fabric and the leaf spring 23 at around a rotation angle of 30 degrees of the loom.
In addition, since it is driven into the woven fabric, an appropriate tension is applied to the weft Y between the drum 16 and the woven fabric. Therefore, mistakes in cutting the weft yarns that occur with the reed 1 can be prevented.

Further, when cutting the weft yarn, the tip of the weft Y does not extend out from the main nozzle 62 toward the weft insertion side, and the posture of the tip of the weft Y is appropriately maintained as shown in FIG. 2. Roughly speaking, even when the number of windings of the weft yarn Y around the drum 16 is small,
There is no fear that the tip of the weft Y will come off the main nozzle 62 due to the winding tension of the weft Y due to the rotation of the yarn winding tube 8.

Subsequently, when the loom rotates around 90 degrees, the weft thread stopper '17 is projected from the inclined portion 16a, and the weft thread gripping member 18 is sunk into the drum 16, releasing the grip on the weft thread Y. Then, the weft Y, which has been wound and stored between the weft locking body 17 and the weft gripping body 18, is pulled out and tightened by the fluid jetted from the main nozzle 62 in synchronization with the weft insertion timing. .

In this way, in this embodiment, the weft gripping and locking body 18 has the same role as the second weft locking body 13 in the conventional structure.
Since the tension of the weft Y is also controlled, the insertion of the weft becomes stable. In addition, since the tension of the weft yarns at the time of fabrication is properly controlled, it is possible to prevent a decrease in the tension of the warp yarns at the edge of the fabric on the main nozzle 62 side of the woven fabric. This can prevent the ends from coming loose.

Further, in this embodiment, the leaf springs 23 can be replaced as appropriate depending on the type of weft yarn or yarn count, so that good weft insertion can always be performed regardless of the type of weft yarn or yarn count.

Note that the present invention is not limited to the above-mentioned embodiments, and can be modified and embodied as follows, for example.

(1) As shown in FIG. 5, a hanging bracket 39 is attached to the cover 22, and a weft gripping piece 40 that is urged downward by a pressing spring 41 is accommodated in the bracket 39.
- 42 to restrict the downward movement of the weft gripping piece 40.

In this case, the weft is gripped between the tip end surface of the weft gripping member 18 and the gripping portion 40a of the weft gripping piece 40. Further, the weft gripping force can be adjusted by replacing the pressing spring 41.

(2) As shown in FIG. 6, the sliding piece 44 and the pressing piece 45 constitute a weft gripping body, and a pressing spring 46 is interposed between the two pieces 44 and 45, and the cover 22 is attached to the f: The weft is held between the lower end surface of the hanging bracket 43 and the upper surface of the hanging bracket 45 which are pressed together.

In this case, the sliding piece 47! I and pressure contact piece 45 are connected to guide tube 3
It is necessary to provide it so that it does not deviate from 7.

(3) As shown in FIG. 7, the shaft 48 is rotated through the rotor 49 as the cam plate 52 attached to the drive shaft 51 rotates simultaneously with the weaving operation of the loom. tension spring 50
A gripping piece 47a made of an elastic body is crimped onto the tip of the weft gripping lever 47 which is reciprocally swung by the gripping piece /17.
a and the drum 16 so as to grip the weft yarn.

(4) Unlike J5 in the above embodiment, the weft gripping and locking body 18 may be formed into an appropriate shape such as not only a cylindrical shape but also a prismatic shape.

(ri) II? The thread gripping locking body 18 is moved in and out of the drum 16 by a rocking motion.

(6) The weft gripping mechanism of the present invention is provided in front of the second weft locking stop 13 in the conventional sub-length device that moves the pair of weft locking bodies 12 and 13 (see FIG. 1) to the right.

In this case, the weft gripping mechanism performs only the weft tension control operation. Further, the present invention can also be used as a mixing device, that is, a sub-length device capable of integrating weft yarns supplied from a plurality of weft supply sections.

Effects As described in detail above, the present invention provides a weft gripper 1'lUM? which grips and releases the weft wound on the yarn winding surface in synchronization with the weft insertion timing on the weft insertion side than the weft locking body.
By placing the + near the bobbin winding part, it is possible to prevent the tip of the weft yarn from extending out from the main nozzle during weft insertion, which is an excellent feature that allows for stable weft insertion without mistakes. In addition, since the weft tension can be properly controlled in the present invention, it is possible to prevent mistakes in weft cutting or loosening of the edges of the woven fabric due to beating, and furthermore, it is possible to prevent thread wrapping. Even when the number of times the weft yarn is wound around the surface is small, the winding tension can prevent the weft yarn from coming off the main nozzle.

[Brief explanation of drawings]

Fig. 1 is a side view showing a conventional weft length measuring device, Fig. 2 is a side view showing an embodiment embodying the present invention, Fig. 3 is a partially broken Igi top view, and Fig. 4 is a side view showing a conventional weft length measuring device. Main part broken side view, No. 5
, 6 diagrams each show another example of the present invention! 7 is a front view showing another example. Drum 16, weft locking body 17, weft gripping body 18, root spring 23゜Spec 6'] Applicant: Toyo Co., Ltd. 1] Automatic Loom Manufacturing Co., Ltd. Representative Patent Attorney On 1) Hironobu Figure 5

Claims (1)

[Scope of Claims] 1. The weft yarn supplied from the weft supplying section is fixed by the weft locking body which is placed in the vicinity of the yarn winding surface with respect to the weft length measuring section forming the yarn winding surface. In a weft length measuring device that is designed to pull out the weft that has been wrapped, the weft thread is wound on one side (wound on one side) on the weft inserting side of the weft locking body. A weft yarn length measuring device installed in a fluid 1! , the weft gripping mechanism includes a weft gripping locking body that protrudes from and retracts from the drum forming the thread winding surface, and a leaf spring that is provided so as to be able to come into contact with and separate from the locking body. A weft thread length measuring device for a fluid injection type loom. 3. The weft thread gripping mechanism includes a weft thread gripping member that retracts from the drum that forms the thread winding surface, etc. The weft yarn length measuring device for a fluid jet loom according to claim 1, comprising: a yarn supply gripping piece that can come into contact with and separate from the weft gripping member and is biased downward. The weft gripping mechanism is provided with a weft gripping lever that swings in synchronization with the weaving operation of the loom, and a tip of the lever that can come into contact with and separate from the thread winding surface of the drum that forms the thread winding surface. A weft length measuring device for use in a fluid injection type loom according to claim 1, comprising a gripping piece made of an elastic body.