JPH02112439A - Weaving method for three-dimensional fabric - Google Patents

Abstract

PURPOSE:To obtain a three-dimensional fabric prevented from weaving shrinkage by inserting and folding back of weft in such a state as to arrange control members to control one or both positions for weft inserting and folding back followed by removing the members from a three-dimensional fabric. CONSTITUTION:Wefts x and y are inserted and folded back at each specified position through respective control members 12a, 12b arranged at respective positions in a warp z group in making a weft inserting action, and the tensions on said wefts x and y are born by the control members, thus, preventing the warp z from being pulled towards the inside of a three-dimensional fabric F due to the tensions on said wefts x and y.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a warp yarn group in which a large number of warp yarns 2 are stretched in multiple rows and multiple columns, and the first weft X and the 21a yarn y are inserted between the rows and columns, respectively. This is a method for weaving a three-dimensional I-woven fabric in a three-dimensional loom, in which the weft thread is inserted perpendicularly to the warp thread 2 using a weft inserter, and a loop is formed at the tip of the weft thread and then folded back.

[Prior Art] Generally, in this type of three-dimensional AM, for example,
3-4145 and shown in FIG. 1O, warps Z are inserted into warp guide tubes 32 arranged in multiple rows and columns on a base 31, and weft thread inserters 33 and 34 are used to insert the warp threads. By entering and retreating between the guide tubes 32, the first weft X and the second weft y are inserted into the warp zr5. Also, insert the selvage yarn into the end loop of each weft yarn x, y, and
Efforts are being made to stop this practice.

[Problems to be Solved by the Invention] However, in the conventional fiber manufacturing method, the weft yarns x, y, which are folded back by forming a loop at their tips, cause the other weft yarns y, acts to pull towards;
When inserting the weft, the folded wefts x and y act in the same manner as described above. Therefore, the weave width of the three-dimensional fabric F is equal to the wefts x and y.
, depends on the tension balance of warp threads 2 and selvage threads, etc.
If the tension of the weft yarns x and y is too strong when inserting and pulling back the weft yarns x and y, the warp yarns 2 stretched in parallel will become the weft yarns X.

There is a problem in that the cross-sectional shape of the three-dimensional fabric F becomes smaller than the intended size because it is drawn inward by the tension of y and shrinkage occurs.

The present invention has been made in consideration of the above-mentioned point U,
The purpose of this is to create a method for producing three-dimensional fabrics in which the insertion of the weft yarns x and y is performed without pulling the warp yarns 2 inward during weft insertion, and which can prevent aS from occurring in three-dimensional HA objects. It is about providing.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a number of warps 2 are stretched in multiple rows and columns, and between the rows and columns of the warp group, the 1uth yarn X and the 2nd In a three-dimensional @machine, the weft yarns y are inserted perpendicularly to the warp yarns Z using a weft inserter, and the weft yarns are woven by forming loops at their tips and folding back.

A regulating member is arranged to regulate at least one of the insertion of weft X13' and the folding position at the insertion of y and the folding position! In this state, the wefts x and y were inserted and folded back, and then the regulating member was removed from the three-dimensional fabric.

Also, the regulating member that regulates at least one of the insertion and folding positions of the wefts x and y is placed at the weaving front! The regulating member is placed at a predetermined position in synchronization with the taking-up operation of the three-dimensional fabric until several weaving cycles such as inserting the wefts x and y and inserting the selvage yarn are performed. The regulating member is moved in parallel in the take-up direction, and the regulating member is moved in the three-dimensional a! After moving to a predetermined position while maintaining the t4Il shape, the regulating member is pulled out from the three-dimensional S object, and placed again at a position to regulate the insertion of the weft yarns x and y at the woven fabric position and the folding position, and multiple regulating members are inserted. W4 ring f
I made it important.

[Operation] In the method of the present invention, before each weft yarn x, y is inserted between the rows or columns of warp yarns Z by a weft inserter and folded back,
A regulating member is disposed at at least one of the insertion and folding positions of the wefts x and y, and each of the wefts x and y is inserted and folded while being engaged with the regulating member. Therefore, the tension applied to the weft yarns x and y when the weft yarn X13' is inserted and turned back is applied directly to the regulating member, and the warp yarn 2 is moved inward through the other weft yarn y and There is no possibility of shrinkage due to tension.

Further, in the invention described in claim 2, a plurality of regulating members are prepared for each of the wefts x and y, and are sequentially arranged at predetermined positions at the cloth facing position to control at least one of the insertion and turning positions of the wefts x and y. regulate. After that, the regulating member remains engaged with the weft yarns x and y until several weaving cycles such as inserting the weft yarns x and y and inserting the selvage yarns are performed in synchronization with the take-up operation of the three-dimensional fabric. The three-dimensional l is translated in parallel to the direction in which the fabric is taken.

Then, after moving to a predetermined position, the regulating member is pulled out from the three-dimensional fabric and the weft X at the woven fabric position is returned.

The crystal ring is used by being placed at a predetermined position that regulates the insertion position of y. The tension of the wefts X and 3/ at the front position affects the part past the front position that forms the three-dimensional fabric, up to several steps from the front position, but it is regulated as described above. When the member moves integrally with the three-dimensional fabric even after passing the loom position, the regulating member takes on the tension of the weft Xy, and the effect of preventing weave shrinkage becomes higher.

[Example 1] The following is a first example embodying the present invention.
This will be explained according to the diagram. As shown in Fig. 3.4, a first weft insertion device 1 is installed on the side of the second group of warp threads stretched in the horizontal direction.
However, a second weft insertion device 2 is disposed above,
A second weft regulating darkness 3 is located at a position facing the first LI thread insertion device 1, and a first LI thread regulating darkness 3 is located at a position facing the second LI thread insertion device 2.
A weft regulating device 4 is provided respectively. In the first weft regulating device 4, a movable body 7 is movably supported between a pair of rails 5 extending parallel to the rows of the second group of warp yarns, that is, extending in the vertical direction, via a pair of front and rear wheels 6a and 6b. ing. A timing belt 8 is attached to one side of the rail 5.
The driving pulley 9 and the driven pulley 10 extend parallel to each other.
wrapped in between. The moving body 7 is a connecting bracket 1
1, the timing belt 8 is integrally movably connected to the timing belt 8.

On the front side of the movable body 7 (upper side in FIG. 3), a pair of regulating plates 12a are provided as regulating members at positions immediately inside the warp threads Z, which are arranged to form rows at both ends of the second group of warp threads.
, 12b are fixed so as to extend in the vertical direction. Due to the reciprocating movement of the timing belt 8 due to the rotation of the drive pulley 9, the regulating plates 12a and 12b are moved together with the movable body 7.
moves to a regulating position inside both ends of the second group of warp threads,
Warp 2! It is designed to be placed in a standby position evacuated from within ¥. The second weft regulating device 3 is also constructed in substantially the same manner as the first weft regulating device 4, and includes a pair of regulating plates 17a on the front side of a movable body 16 that is reciprocated on a rail 15 extending in the horizontal direction. .

17b is fixed.

Next, a method of weaving a three-dimensional fabric using the apparatus configured as described above will be described when a strong tension is applied to the wefts x and y when the weft inserter moves forward. First weft insertion tool 1a, second a thread insertion tool 2a, regulation plates 12a, 12b, 1
First, the first weft regulating device 4 is activated from the state shown in FIG. 3 in which the weft yarns 7a and 17b are placed in the standby position, and the regulating plates 12a and 12b move forward together with the movable body 7 to control the rows at both ends of the second group of warp yarns. The warp threads z1. It is placed at a restriction position corresponding to just inside z2, resulting in the state shown in FIG. Note that FIG. 1.2 shows a case where a set of two warp threads z1 and z2 are used as the warp threads 2, and both weft threads x and y are inserted into the opening of the warp thread z2.

Next, when the 1411th yarn insertion tool 1a moves forward, the first weft X is bent inward of the three-dimensional fabric along the shape of the regulating plate 12a, as shown in FIG. After the first weft insertion tool 1a advances to a position where its tip protrudes outside the warp zt\ and the selvage thread Px is inserted into the end loop of the first weft X, the first weft insertion tool 1a retreats. One piece of the layer containing the first weft is formed.

Tension is applied to the tm-th yarn X during the forward movement of the first weft insertion tool 1a, but the first weft X is bent while being engaged with the regulation plate 12a, and also during the forward movement of the 11a-th yarn insertion tool 1a, the regulation plate 12a, the first weft X
The tension of
Since almost no tension is applied to the first weft X when the yarn insertion tool 1a is retreating, the regulating plates 12a and 12b also start to retreat after the first weft insertion tool 1a starts to retreat and before the retreat is completed.

When the retreat of the regulating plates 12a and 12b is completed t&, the second weft regulating device 3 is activated, and the regulating plates 17a and 17b move forward to move the warp threads z1 arranged so as to constitute the rows at both ends of the warp group.
, z2, and the 218th thread insertion tool 2a, which is disposed at a regulating position corresponding to the immediate inside of z2, is moved forward to a predetermined position;
After completing the insertion of the selvage yarn py into the tip loop of the second weft y,
2nd I! 2 The thread insertion tool 2a starts to retreat, and then the regulation plate 17a.

One weaving cycle is completed by the t&back of 17b. Thereafter, similar operations are repeated to produce a three-dimensional fabric.

Before the weft insertion tools 1a, 2a complete retraction, the regulation plates 12a, 1
7a starts to retreat, and the movement of the weft inserters la, 2a and the movement of the regulation plate 12ar17a are performed in parallel, so that the time required for one weaving cycle is shortened. Also, a regulating plate 12b is provided on the side opposite to the turning side of the wefts x and y.
, 17b are inserted, when the weft insertion tools 1a, 2a move forward, the warp threads zl, z2 stretched on the side opposite to the insertion side of the weft thread insertion tools 1a, 2a are three-dimensionally inserted through the selvage threads Px, Py. It is reliably prevented from being drawn inside the fabric.

[Example 2] Next, a second embodiment will be explained according to FIG. 6.7.

In this embodiment, the regulating plates 12a, 17a, etc. are the weft X.

Not only the insertion position of y, that is, the woven position! ! ! It differs from the previous embodiment in that it is also inserted at a position close to the front of the finished three-dimensional fabric. As shown in FIG. 6, a plurality of (three in this example) regulating plates 12a, 12b, 17a,
17b (12a.

12b (only shown) are fixed at predetermined intervals, and this support bracket 18 is fixed to the movable bodies 7 and 16. Therefore, when using the weft regulating device 3゜4 with the above configuration,
As the movable body 7 moves forward, as shown in FIG.
a and 12b are arranged at the insertion position of the first weft X and at the position from the front to the second stage in the finished three-dimensional fabric F.

The tension of the weft x+y is not only at the insertion position (weaving position), but also at the
It also acts on the vicinity of the front of the woven three-dimensional fabric, so when a large tension is applied to the weft X+'j, the wefted three-dimensional fabric l11'! A considerably large tension is also applied to the vicinity of the IJ cloth front position. However, in this embodiment, when tension is applied to the wefts x and y by advancing the weft inserters 1a and 2a, the regulating plate 12a also appears near the front position of the three-dimensional fabric F that has been woven.

12b, 17a, 17b are arranged, weft x, y
The effect of preventing woven shrinkage is reliably demonstrated even when large tension is applied to the fabric.

[Embodiment 3] Next, a third embodiment will be described with reference to FIGS. 8(a) and 8(b). In this embodiment, the regulating plates 12a, 17a, etc. inserted at predetermined positions in the row or column of the second group of warp yarns at the front position (insertion position) of the weft yarn x+3' are used to insert the weft yarn , until the weaving cycle such as the insertion of Py is performed several times, it is moved in parallel in the direction of the three-dimensional textile material in synchronization with the three-dimensional textile material collection operation, and the corresponding standard v1 plates 12a, 1
After the regulating plates 12a, 17a, etc. are moved to a predetermined position while maintaining the shape of the three-dimensional fabric, the regulating plates 12a, 17a, etc. are moved to the three-dimensional fabric.
Il! ! I! The weft x is pulled out from I and is at the woven fabric position again.
, y is greatly different from the above-mentioned embodiments in that a plurality of regulating plates are arranged at positions that regulate the insertion positions of the elements and are used in circulation. That is, in this embodiment, the regulation plate 12a and the like inserted into the second group of warp threads at the front position are not inserted into and pulled out from the second group of warp threads every weaving cycle, but the regulation plate 12a etc. inserted into the second group of warp threads at the front position It is held in a predetermined position inside the warp Z arranged on the outside of the three-dimensional fabric until it is completed several times.
Even if a large tension is applied to the wefts x and y during weaving, aa-a-a-a-a-sharp is reliably prevented.

Note that the present invention is not limited to the above embodiments,
For example, as shown in FIG. 9, the weft insertion operation may be performed with the tip of the regulating plate 12a etc. inserted at a predetermined position supported by the support plate 19. In this way, the weft x, Even if a large tension is applied to y, the rule-1 plate 12
The bending of the wefts such as a is prevented, and the wefts x and y are reliably folded back at predetermined positions, thereby preventing weaving shrinkage of the three-dimensional fabric. Regulation plate 1
By changing the width of the wefts 2a, etc. in accordance with the pitches of the wefts x and y in two directions, it is possible to respond to changes in the specifications (fabric density) of the three-dimensional fabric. Furthermore, in each of the above embodiments, the weft insertion tool 1a
, 2a are moved forward, and the weft yarns x and y are strongly subjected to tension. However, this invention is applied to the case where the weft yarns x and y are subjected to a strong tension when the weft inserters 1a and 2a are moved backward. In that case, the regulation plate 12a etc. should be placed in a predetermined position before the weft insertion tools 1a, 2a start to retreat, and the regulation plate 12a etc. should start to retreat after the weft insertion tools 1a, 2a complete their retreat. Furthermore, in the case where the regulating member is moved between the regulating position and the standby position at the cloth facing position for each weaving cycle, the regulating member may be arranged outside the warp threads 2.

[Effects of the Invention] As described in detail above, according to the present invention, the weft x,
y is inserted and bent at a predetermined position, and the weft x,
Since the tension of y is carried by the regulating member, the tension of the wefts x and y prevents the warp threads 2 from being drawn to the inside of the three-dimensional fabric, preventing shrinkage, and the fabric is woven to the predetermined dimensions, resulting in a high-quality product. is obtained. Furthermore, by changing the width of the regulating member in accordance with the pitch of the wefts x and y of the three-dimensional atm material, the above-mentioned effects can be achieved even if the specifications of the fabric change.

Further, the regulation IT1 member placed at a predetermined position at the weaving front position is moved in parallel in the direction of taking off the three-dimensional fabric in synchronization with the taking-off operation of the three-dimensional fabric until several weaving cycles are performed, and then, When the regulation plate is pulled out from the three-dimensional textile material, even if a large tension is applied to the weft yarn Xry during the weft insertion operation and this tension affects the finished part near the weaving position, the fibers can be reliably shrunk. is prevented.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention,
Figures 1 and 2 are schematic perspective views showing the weft insertion state, Figure 3 is a front view showing the arrangement relationship between the weft insertion device and the weft regulation device stop;
Fig. 4 is a side view, Fig. 5 is a diagram of the weaving cycle, Fig. 6 is a perspective view of main parts of the weft regulating device of the second embodiment, Fig. 7 is a schematic diagram showing the weaving state, and Fig. 8 ( 8(a) is a schematic side view of the third embodiment, FIG. 8(b) is a schematic front view of the third embodiment, FIG. 9 is a sectional view of a modified example, and FIG. 10 is a schematic diagram of a conventional device. A first weft insertion tool 1a, a second weft insertion tool 2a, and regulation plates 12a, 12b, and 17a as regulation members. 17b, 1st m yarn X, 2nd yarn y, warp yarns z, z1. z2, three-dimensional fabric F. Patent Applicant: Toyota Automobile Co., Ltd. 1afi Manufacturing Co., Ltd. Arisawa Manufacturing Co., Ltd. Representative Patent Attorney On 1) Hironobu Figure 7a

Claims (1)

[Scope of Claims] 1. A weft insertion tool for inserting the first weft (x) and the second weft (y) between the rows and columns of a warp group in which a large number of warps (z) are stretched in multiple rows and columns, respectively. In a three-dimensional loom, the weft (x, y) is inserted perpendicularly to the warp (2), forms a loop at its tip, and is folded back. )
A method of weaving a two-dimensional fabric, in which a weft (x, y) is inserted and folded in a state where a regulating member regulating the insertion and folding position of the weft is arranged, and then the regulating member is removed from the three-dimensional fabric. 2. The first weft (x) and the second weft (y) are inserted between the rows and columns of a warp group in which a large number of warp threads (2) are stretched in multiple rows and columns, respectively, using a weft insertion tool as the warp threads (2). In a three-dimensional loom that weaves in such a way that the weft yarns are inserted in a perpendicular state and are folded back with a loop formed at the tip thereof, a regulating member that regulates at least one of the insertion and folding positions of the weft yarns (x, y) is placed at a predetermined position at the loom position. The regulating member is placed in a position where the three-dimensional fabric is taken up in synchronization with the three-dimensional fabric taking-up operation until several weaving cycles such as weft insertion of weft yarns (x, y) and selvage insertion are performed. After the regulating member moves to a predetermined position while maintaining the three-dimensional fabric shape, the regulating member is pulled out from the three-dimensional fabric, and the weft (x, y) at the front position is inserted and folded again. A method for weaving a three-dimensional fabric in which a plurality of regulating members are placed in positions for regulating their positions and are used in circulation.