JPH04106384U - Tatsu-in device for shuttleless looms - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure threading in an air-type tuck-in device that threads a weft end gripped by an air jet into a needle by an air jet. [Structure] A yarn gripping path regulating plate 20 is arranged between the edge We of the fabric W ₁ and the threading nozzle 8a, and at the start of beating, the side edge 20b of the yarn gripping path regulating plate 20 is connected to the thread gripping nozzle 9.
The threading nozzle 8a is positioned closer to the reed than the straight line L that connects the injection area of the threading nozzle 8a and the injection area of the threading nozzle 8a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention consists of a needle that reciprocates in the weft direction and a needle that is placed at the threading position. Air-injection threading mechanism for passing the weft end through the threading hole at the tip of the dollar; To position and hold the weft end threaded through the threading hole of the dollar at a predetermined threading preparation position. In cooperation with the air-injection type yarn gripping mechanism, the edge of the beaten weft yarn is placed inside the warp opening. This invention relates to a tuck-in device in a retractable shuttleless loom.

0002

[Conventional technology]

This type of tuck-in device is disclosed in Japanese Patent Publication No. 61-8182 and Utility Model Publication No. 63-11. It is disclosed in the No. 0592 publication. In the conventional device disclosed in Japanese Patent Publication No. 61-8182, The air jetting action of the air jetting yarn gripping mechanism bends and grips the weft ends. , the air injection type threading mechanism blows air into the threading hole of the needle placed at the threading position. A configuration is adopted in which the weft ends located at the gripping position are blown in by a shooting action. fruit In the conventional device disclosed in Japanese Patent Publication No. 63-110592, the air injection type threading mechanism It is provided around the threading hole at the tip, and the jetting action causes the weft end to become thread-like. It is designed to be introduced by suction into the through hole.

0003

[Problem that the idea aims to solve]

By the jet action of the air jet type thread gripping mechanism, the thread is connected to the edge of the front of the fabric. In order to transfer the gripped weft end to the jet action of the air jet threading mechanism, The injection action position of the air injection threading mechanism is the edge of the fabric and the injection of the air injection thread gripping mechanism. It is placed at a predetermined timing on a straight line connecting the operating position. However, Orimae The position of the reed fluctuates depending on the reed stroke, and the orimae position when the reed is in its most advanced state is the same as the reed stroke. When the reed begins to move backward, the reed is pushed from the starting position of the weaving cloth to the weaving fabric side. It then begins to return to its starting position. Changes in the weave position are determined by the yarn count, warp density, and weft density. Rui is influenced by factors such as the reed density, and the position of the woven fabric varies greatly in the case of high-density fabrics. Hey. Such fluctuations in the position of the woven cloth are due to the yarn gripping action position of the air-injected yarn gripping mechanism and the difference in the position of the woven cloth. This causes a change in the position of the weft ends located on a straight line connecting the edges of the The installation position may deviate from the injection action position of the air injection type threading mechanism. like this If misalignment occurs, there is a high chance of failure in passing the weft end through the threading hole of the needle. An air-type tuck-in device is used to shape the selvedge of high-density fabric, which has large fluctuations in the position of the woven fabric. difficult to achieve.

0004 In the conventional device disclosed in Japanese Utility Model Application Publication No. 63-110592, the edge of the fabric and the thread gripping nozzle are A path regulating lever is interposed between them, but the needle threading position is at the edge of the woven fabric. Since it is set between the hem and the path regulating member, weft ends due to fluctuations in the position of the fabric It is not possible to eliminate the positional fluctuations of the parts. The present invention eliminates the influence of fluctuations in the position of the woven fabric and allows reliable threading of the needle. The purpose of the present invention is to provide an air-type tuck-in device.

[0005]

[Means to solve the problem]

For this purpose, in the present invention, the yarn gripping action position of the air jet type yarn gripping mechanism and the air jet The threading action position and the woven fabric are located on a straight path passing through the threading action position of the shot-type threading mechanism. A thread gripping path regulating part is provided between the weaving front and the reed side from the edge of the weaving front at the start of reed beating. The position of the straight path was set so that the

[0006]

[Effect]

The orimae fluctuates between the position at the start of the reed beating and the most advanced position of the reed. Thread grip path rule The control part is located on a straight line connecting the edge position of the woven fabric and the thread gripping position at the start of reed beating. It is located on the reed side from this straight line position. Therefore, the air-injected thread gripping mechanism The weft ends on the straight path being gripped do not fluctuate, and the air-injected yarn The air jet of the threading mechanism reliably acts on the weft ends.

[0007]

【Example】

An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 10. 1 and 2 show a tuck-in device installed at the starting end of weft insertion. 1 is a cam machine The cam box 1 has a shaft 2 and a hollow shaft 3 for warp threads. It is extended and supported so that it can move back and forth in the direction. The needle shaft 4 is inserted into the hollow shaft 3. It can be rotated back and forth by a cam mechanism inside the cam box 1. hollow shaft A needle 5 is attached to the tip of the needle shaft 4 extending from the needle shaft 3. Due to the rotation of the shaft 4, the tip of the needle 5 pushes through the upper warp threads T and opens the warp threads. Enter the mouth.

[0008] A mounting base 6 is installed and fixed between the tips of the shaft 2 and the hollow shaft 3, and A holding block 7 is fastened to the hanging portion 6a of the mounting base 6. holding block A pair of nozzle stands 8 and 9 are vertically arranged and protrude from the lower front surface of the tank 7, as shown in FIG. As shown in the figure, a threading nozzle 8a is provided on the lower surface of the upper nozzle stand 8. In addition, an introduction hole 9a is provided through the lower nozzle stand 9, facing the threading nozzle 8a. There is. Further, a thread gripping nozzle 9b is provided on the upper surface of the lower nozzle stand 9. In addition, an introduction hole 8b is provided through the upper nozzle stand 8 facing the thread gripping nozzle 9b. Ru.

[0009] A positioning bracket 10 is fastened to the upper part of the mounting base 6 on the hollow shaft 3 side. A stopper bolt 11 is screwed into the tip of the positioning bracket 10. It is worn. The stopper bolt 11 tightens and fixes the needle 5 to the needle shaft 4. It is in abutting relationship with the bolt 12, and due to this abutting relationship, the threading hole at the tip of the needle 5 is opened. 5a is positioned between the threading nozzle 8a and the introduction hole 9a.

0010 A pair of blades 13A and 13B are rotatable on a support shaft 14 on the lower side of the holding block 7. A guide pin 13 is supported by the blade and protrudes from the rear of the double-edged blades 13A and 13B. a and 13b are the guide grooves 15 of the guide body 15 suspended and supported on the lower surface of the cam box 1. a, 15b. Double blade bodies 13A and 13B are integrated with shaft 2 and hollow shaft 3 The guide grooves 15a, 15b and the guide pins 13a, 13b Due to this action, the double-edged blades 13A and 13B perform opening/closing and cutting operations. Main nozzle for weft insertion The weft yarn Y, which is injected from the weft inserter 19, is inserted into the main weft inserter by this opening/closing and cutting operation. It is cut and separated from the nozzle 19.

[0011] As shown in FIG. A thread gripping path regulating plate 20 is fastened to the lower corner of the hook 7 by a pair of bolts 21. is fixed. The thread gripping path regulating plate 20 extends from the bottom surface of the lower nozzle stand 9 to the upper side. It has a shape that extends over the nozzle stand 8. Bolt 21 as shown in Figure 3 The bolt insertion hole 20a on the thread gripping path regulating plate 20 through which the The thread gripping path regulating plate 20 is installed in the direction in which the nozzle stands 8 and 9 protrude. The mounting position can be adjusted.

As shown in FIG. 5, the area where the thread gripping nozzle 9b and the introduction hole 8b, which are in the thread gripping action position, face each other is closer to the blade than the area where the threading nozzle 8a and the introduction hole 9a, which is in the threading action position, face each other. It is set close to the 13A and 13B sides and further away from the base ends of the nozzle stands 8 and 9. 4 and 5 show the state in which the holding block 7 and the blades 13A, 13B are fully advanced toward the reed (not shown), and even when the weft yarn Y, which has been inserted completely, is cut by the blades 13A, 13B. be. This cutting point is at the start of reed beating, and the straight line L connecting the thread gripping action position and the threading action position is on the edge We of the facing W ₁ of the woven fabric W at the start of reed beating, or is lower than the reed edge We. It is set in a position that passes through the side area. The mounting position of the thread gripping path regulating plate 20 with respect to the holding block 7 is adjusted and set so that its side edge 20b is in contact with the straight line L in the state shown in FIG.

[0013] Reference numeral 22 denotes a guide rod fixed to the front surface of the holding block 7, and the guide rod 22 is used to cut and separate the ends of the weft yarns from the weft insertion main nozzle 19 by the cutting operations of the blades 13A and 13B. This is for guiding _Y1 to the thread gripping position. A mechanical rotary valve mechanism 16 is attached to the side surface of the cam box 1, and is driven by a drive mechanism within the cam box 1. The threading nozzle 8a and the thread gripping nozzle 9b are connected to a rotary valve mechanism 16 via tubes 17 and 18, and air injection in the threading nozzle 8a and the thread gripping nozzle 9b is controlled by driving the rotary valve mechanism 16. .

[0014]The cut end _Y1 of the weft yarn Y cut at the time shown in FIGS. 4 and 5 is blown into the introduction hole 8b by the jet action of the yarn gripping nozzle 9b. As shown in FIG. 6, the weft yarn Y whose cut end _Y1 is gripped by the jet action of the yarn gripping nozzle 9b starts beating as shown in FIG. The cut end Y ₁ connected to the edge We of the fabric W ₁ at the start of beating is in a substantially straight line and in contact with the side edge 20b of the yarn gripping path regulating plate 20, and is located on the straight line L in FIG. .

The reed moves further toward the woven fabric W from the beating start position shown in FIG. 7, and the woven fabric W ₁ moves to the position shown in FIG. 8. At the time of completion of beating, the cut end _Y1 connected to the end edge We of the fabric _W1 is bent in contact with the side edge 20b of the thread gripping path regulating plate 20, and is bent between the thread gripping nozzle 9b and the introduction table 8b. A portion of the cut end _Y1 between the thread gripping action position and the end edge We is located on the straight line L in FIG.

[0016] The reed moves backward from the beating completion position shown in FIG. 8, and along with this retreat, the woven fabric W ₁ moves back toward the position at the start of beating the reed shown in FIG. Thereafter, as shown in FIGS. 9 and 10, the tip of the needle 5 passes through the warp threads T and enters the warp opening, and also enters between the upper and lower nozzle stands 8 and 9, and the threading hole 5a passes through the threading nozzle 8a. and the introduction hole 9a. At approximately the same time as this arrangement, the thread gripping nozzle 9b stops spraying, and the threading nozzle 8a starts spraying, and this spraying action blows the cut end _Y1 into the threading hole 5a.

The path of the cut end Y ₁ gripped by the jetting action of the yarn gripping nozzle 9 b changes depending on the positional change of the woven fabric W ₁ after beating is completed, but the yarn gripping action position and the yarn gripping path regulating plate 20 It is always located on the straight line L between the side edge 20b and the side edge 20b regardless of the positional fluctuation of the woven fabric _W1 . That is, the cut end Y ₁ exists at the threading action position regardless of the positional variation of the cloth cover W ₁ , and the cut end Y ₁ is reliably subjected to the jetting action of the threading nozzle 8a. Therefore, the cut end _Y1 is reliably passed through the threading hole 5a located at the threading operation position, making it possible to form tuck-in selvedges using the air method even in the case of high-density fabrics that are particularly prone to fluctuations in the position of the fabric. Become.

Furthermore, in this embodiment, since the attachment position of the yarn gripping path regulating plate 20 can be adjusted, it is possible to finely adjust and set the yarn gripping path (straight line L) according to differences in weft type, fabric pattern, etc. can. After threading the needle 5, the distal end of the needle 5 is removed from the warp opening by the rotation return operation of the needle shaft 4, and the cut end _Y1 is drawn into the warp opening. Then, the needle 5 is retracted toward the woven fabric W by the retracting operation of the hollow shaft 3 in the warp direction.

In this embodiment, a tuck-in device on the weft insertion start side has been described, but the present invention can also be applied to a tuck-in device on the weft insertion end side. The present invention is, of course, not limited to the above-mentioned embodiments. For example, as shown in FIG. 11, it is possible to adopt a yarn gripping path regulating body 23 equipped with a rebound prevention wall 23a, which prevents cutting due to the reaction when cutting the weft yarn. The rebound from the end portion Y ₁ toward the woven fabric W ₁ side is caught by the rebound prevention wall 23a, and entanglement with peripheral equipment is prevented.

[0020] Also, as shown in FIG. 12, a fixed rod 24 installed between the upper and lower nozzle stands 8 and 9, Alternatively, as shown in FIG. 13, the corner 7a between both nozzle stands 8 and 9 is used as a thread gripping path regulating part. Embodiments are also possible.

[0021]

[Effect of the idea]

As described in detail above, the present invention has a straight line connecting the thread gripping position and the threading position. At the top, a thread gripping path regulating part is provided between the threading action position and the edge of the woven fabric, and Since the linear position was set closer to the reed than the edge position of the fabric at the start of beating, the gripping The cut end of the weft thread is placed on the threading action position regardless of the fabric front fluctuation, and the knee It has the excellent effect of being able to reliably receive the jetting action for threading the dollar.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the main parts of a tuck-in device.

FIG. 2 is a perspective view showing a drive section of the tuck-in device.

FIG. 3 is a partially cutaway side view showing how the thread gripping path regulating plate of the first embodiment is attached.

FIG. 4 is a longitudinal sectional view showing a weft cutting state.

FIG. 5 is a sectional view taken along line AA in FIG. 4;

FIG. 6 is a longitudinal cross-sectional view showing a thread gripping state.

7 is a sectional view taken along line BB in FIG. 6. FIG.

FIG. 8 is a plan cross-sectional view showing a state in which beating is completed.

FIG. 9 is a longitudinal sectional view showing the threading state.

FIG. 10 is a sectional view taken along line CC in FIG. 10;

FIG. 11 is a plan cross-sectional view showing another example of the thread gripping path regulating section.

FIG. 12 is a plan cross-sectional view showing another example of the thread gripping path regulating section.

FIG. 13 is a plan cross-sectional view showing another example of the thread gripping path regulating section.

[Explanation of symbols]

5... Needle, 5a... Threading hole, 8a... Threading nozzle,
9b... Yarn gripping nozzle, 20... Yarn gripping path regulating plate, 20b
...Side edge that becomes the thread gripping path regulating part, Y...Weft, Y ₁…cutting
End, W₁...Orimae, We...Edge, L...Straight line.

Claims (1)

[Scope of utility model registration request] Claim 1: A needle that rotates in the weft direction, an air injection threading mechanism for passing the end of the weft through a threading hole at the tip of the needle placed at a threading position, and a threading hole in the needle. In a tuck-in device that performs a tuck-in operation in cooperation with an air-injection yarn gripping mechanism for positioning and holding the weft end to be threaded at a predetermined threading preparation position, the yarn-clipping action of the air-injection yarn gripping mechanism A thread gripping path regulating section is provided between the threading position and the front of the woven fabric on a straight line passing through the threading position and the threading position of the air-injection threading mechanism. A tuck-in device for a shuttleless loom, wherein the position of the straight line is set to be located on the reed side from the edge of the loom.