JPS63235544A - Fabric changing in weft yarn density, method and loom for weaving the same - 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 [Field of Industrial Application] The present invention relates to a woven fabric with varying weft density, a weaving method thereof, and a loom for weaving the woven fabric. This technology relates to innovative textiles that have unique textures and characteristics by skillfully changing the supply speed of textiles, as well as technology that can produce such textiles. It can be widely used in the product industry and textile machinery industry.

[Prior art and problems to be solved] Conventionally, when fabrics with different thread densities are required, reed
) A method is adopted in which weaving is performed by forming a dense and dense arrangement in the warp threads distributed in the weaving process.

However, the woven fabrics obtained by this method are limited by the weaving width of the loom and the grain size of the reeds, so the woven fabrics obtained by this method are woven fabrics with long sparse repeats and woven fabrics with delicate sparse and dense patterns. In addition to the fact that it was not possible to obtain a complex pattern of sparse and dense patterns, it would require a great deal of effort in the distribution process, so it has not been practiced very often until now.

By the way, a woven fabric with varying thread density (hereinafter referred to as "variable woven fabric J") can be made lighter and has very good hem handling if, for example, a sparse part with a low thread density is placed at the bottom. It is popular among women who demand it, and when used as fabric for noren curtains or curtains, it is convenient to place a light sparse section at the bottom because there is less resistance when pushing through the hanging pieces by hand, and it also prevents blowing by the wind. The flow is light and airy.

The present invention has been made in view of the fact that, although variable woven fabrics have advantages that are difficult to discard as mentioned above, there are restrictions on the production thereof due to the weaving width of the loom and the reed mechanism. However, in addition to breaking down the size constraints of conventional variable woven fabrics, we have gone one step further and created an epoch-making variable woven fabric that has a much higher degree of freedom in design and texture than conventional variable woven fabrics. It is on offer.

Another object of the present invention is to provide a new weaving method that can continuously and efficiently produce a desired variable woven fabric by freely changing the weft density.

Furthermore, another object of the present invention is to provide a new loom which is advantageous for weaving a variable woven fabric in which the insertion density of weft yarns can be freely changed by controlling the warp take-up speed.

[Technical means adopted to achieve the objective] The present inventor has focused on the insertion density of weft threads in the woven fabric as a key point to achieve the above objective, and has developed a method of systematically distributing the insertion density in various patterns of sparseness and density. Creation of physical changes over the entire length of the fabric (for example, combinations of stiff parts and soft parts or thin parts and thick parts) and design changes (for example, dense and dense patterns, glossy textures, etc.) In addition, to create such a modified woven fabric, an unexpected method was adopted in which the rotational speed of the friction roller that takes up and drives the cloth was changed slowly and rapidly to skillfully change the insertion density of the weft yarns into the warp yarns. This enabled efficient mass production of the loom without complicating the loom mechanism or increasing costs.

〔Example〕

Therefore, when evaluating the characteristics of the woven fabric, the most important point of the present invention lies in the planned distribution of the insertion density of the weft yarns. When evaluating mainly, the most important point is to change the rotational speed of the friction roller and thereby vary the feeding speed of the warp threads to be taken up, thereby controlling the insertion density of the weft threads finely and finely. When the present invention is evaluated as an idea for improving a loom, the most important point lies in the adoption of a transmission device for variable speed control of the rotational speed of the friction roller.

Therefore, in the following, the present invention will be illustrated and explained using an example of a configuration for controlling the speed change of a friction roller in the accompanying drawings. In addition, Figure 1 is an external view of the loom (air jet tom),
Figure 2 is a schematic mechanical diagram of the same loom, Figure 3 is an explanatory diagram of the mechanism of the cloth feeding device installed in the conventional loom, and Figure 4 is an eccentric gear type transmission device that controls the rotational speed of the friction roller in the loom of the present invention. Fig. 5 is a mechanical diagram of a second configuration example in which the rotation speed of the friction roller is controlled by a scroll gear type transmission, and Fig. 6 is a mechanism diagram of a second configuration example in which the rotation speed of the friction roller is controlled by a three-stage scroll gear type transmission. Figure 7 is a mechanical diagram of a fourth configuration example in which the rotational speed of a friction roller is controlled by a variable diameter pulley type belt transmission transmission; The figure is a mechanical diagram of a fifth configuration example in which the rotational speed of a friction roller is electrically controlled by an electric transmission device. Figure 9 is a plan view schematically showing the appearance of the fabric surface of the first embodiment of the woven fabric of the present invention. , FIG. 10 is a plan view schematically showing the surface appearance of the second embodiment of the woven fabric of the present invention, and FIG. 11 is a plan view schematically showing the surface appearance of the third embodiment of the woven fabric of the present invention. Plan, 1st
FIG. 2 is a plan view schematically showing the appearance of the fabric surface of a fourth embodiment of the woven fabric of the present invention (warp yarn density is also arranged sparsely and densely).

In the drawing, reference numeral 1 indicates a warp beam that unwinds and pays out the warped warp threads W-W, and reference number 2 indicates a warp beam that vertically divides the warp threads W-W, . . . 3 is an air-jet type weft insertion device that pulls out the weft Y piece by piece from the weft storage section and inserts it into the opening of the separated warp yarns W-W, and 4 is an inserted weft-type belt. The left weft Y is pushed to the beating line B by a beating motion, and the warp W is left behind.
-W... and weft Y-Y... are arranged into a woven fabric C with an orderly structure; - 5 is a friction roller; 61 is a reed that reverses and guides the beat-treated woven fabric C; A guide roller 62 makes the friction roller 5 rotate once, and 62 is a guide roller that further reverses and guides the woven fabric C fed in contact with the friction roller and sends it to a cross roll to be described later.・61, 62), the reference numeral 7 is a transmission device that changes and controls the rotational speed of the friction roller 6, and the reference numeral 8 is a woven fabric C that is taken up and fed via the fabric feeding device (5, 61, 62). It is a cross roll that winds up.

The most important elements among the above components are the cloth feeding device (5, 61, 62) and the transmission device 7, and the other technical elements, that is, the warp beam 1, the belts 2, 2, . . . Mechanisms such as the weft insertion device 3, reed 4, and cross roll machine are almost the same as those of conventionally known looms.

Therefore, here, a specific example of the transmission device 7 that changes and controls the rotational speed of the cloth feeding device (5, 61, 62) will be illustrated and explained in more detail.

FIG. 4, which shows a first configuration example, shows the transmission mechanism of the eccentric gear type transmission 7, in which the click (click) feed operation is performed at a predetermined timing in conjunction with the main shaft of the loom (not shown).
) 71 intermittently rotates the ratchet wheel 72 one pitch at a time. A drive gear 73 is coaxially fixed to the ratchet wheel 72, and the drive gear 73 also rotates in accordance with the rotation of the ratchet wheel. This drive gear 7
3 is a transmission gear 75 coaxially equipped with a first eccentric gear 74a.
are in mesh with each other, and the first eccentric gear 74a is rotated in conjunction with the rotation of the drive gear 73. On the other hand, the first eccentric gear 7
4a meshes with a second eccentric gear 74b of the same shape disposed symmetrically thereto, and since the second eccentric gear 74b is equipped with a positive six gear 76 on the same axis, the first eccentric gear 7
4a and the second eccentric gear 74b cause regular rotation irregularities in the regular six gears 76. The uneven rotation of the regular six gears 76 generated in this way is caused by the gear train (77a, 77).
7b, 77c, 77d) to the friction roller 5.
is transmitted to the friction roller 5, causing the desired rotational unevenness in the friction roller 5, and causing the take-up and feed speed of the woven fabric C and the warp yarns W-W to change slowly and rapidly over time.

Therefore, the weft yarns Y, Y, etc. are inserted into the openings of the warp yarns W-W, etc. at a constant timing by the weft insertion device 3.
The insertion density becomes dense when the warp speed becomes slow, and becomes sparse when the warp speed becomes fast. By the way, when weaving is carried out using a loom that employs the eccentric gear type transmission 7 shown in Fig. 4, the change from placement to line area and from line area to placement is gradual, as shown in Fig. 9. A woven fabric C is obtained.

FIG. 5, which shows a second configuration example, shows, in place of the first eccentric gear 74a and the second eccentric gear 74b in the first configuration example,
When weaving using a loom employing a scroll gear type transmission device 7 constructed by replacing the first scroll gear 74a° and the second scroll gear 74b′, as shown in FIG. →The change in the line area is gradual, and the change from the line area to the placement is radical, resulting in a woven fabric C.

The woven fabric shown in Fig. 12 was woven by adjusting the density of the warp yarns W-W... in the liquid flow arrangement, and the change in the density of the weft yarns was no different from that in Fig. 10. , it is possible to weave with a loom that employs the second configuration example.

FIG. 6 showing a third configuration example shows that instead of the first eccentric gear 74a and the second eccentric gear 74b in the first configuration example,
This shows a three-stage scroll gear type transmission device 7 constructed by replacing the first scroll gear 74a'' and the second scroll gear 74b'.When weaving using a loom employing this device, as shown in FIG. , a variable woven fabric C is obtained in which placing, middle, and line regions appear alternately.

FIG. 7 showing a fourth configuration example shows a variable diameter pulley type belt transmission transmission device 7, in which a bell crank 78 is driven by a rotating cam 78 that rotates in conjunction with the main shaft of a loom (not shown).
When a is swung around the pivot point P, the conical frame F
, - The diameter of the variable diameter boob IJ78b constructed by interlacing Ft in a slidable manner in the axial direction expands and contracts. A belt 78C is drawn on this variable diameter pulley 78b, and when the bell l-78c is driven in circulation by a drive source (not shown), the variable diameter pulley 78 moves at a speed proportional to the diameter of the bell l-78c at the time of contact. It rotates while changing every moment. This rotation is transmitted to the friction roller 5 via the transmission gear 78d → driven gear 78e, and the friction roller 5
The woven fabric C and the warp W-W are
...The take-up feed speed is gradually changed over time.

FIG. 8 showing a fifth configuration example shows an electric transmission device 7.
represents. This electric transmission device includes a detector 79a that detects the operating speed of the loom; a computing unit 79b that processes a detection signal output from the detector 79a based on a predetermined gear shift program and outputs it as a rotational speed command signal; The DC current supplied from the rectifier 79c is converted into a necessary frequency current in response to the command signal sent from the computing unit 79b, and the servo motor? A speed controller 7 transmits power to the servo motor 79d and controls the rotational speed of the servo motor 79d over time.
9e; the servo motor 79;
The friction roller 5 is driven to rotate through a transmission gear 79f fixed to the output shaft of the transmission gear 79f and a driven gear 79g rotated by the transmission gear 79f. According to this method, the rotational speed of the servo motor 79d can be freely controlled by a computer program, so subtle changes can be made in the speed change control of the friction roller 5, and the weft density in the woven fabric C can be controlled. Variability can be greatly increased.

Although the present invention has been described in detail above, focusing on the configuration example of the transmission, the present invention is by no means limited to the above-described embodiments, and various modifications can be made within the scope of the claims. For example, the present invention is not limited to variable woven fabrics woven using an air jet loom, but can also be woven using any loom such as a water jet loom, a rapier loom, or a shuttle loom, as long as the weft yarn insertion density is varied. This also applies to variable woven fabrics, and the type of loom does not matter at all, as long as the feed speed of the warp threads supplied from the warp beam is changed slowly or rapidly by changing the rotational speed of the Flixiron roller. It must be said that weaving methods and looms in which the rotational speed of the friction roller is variable-speed controlled by any mechanism belong to the technical scope of the present invention.

[Effects of the present invention]

As explained above using the embodiments, according to the present invention,
The flexibility of the weft insertion density has been dramatically increased, making it possible to mass-produce variable woven fabrics rich in design and texture with surprisingly high efficiency, and by arranging the distribution arrangement of the reeds, the warp Unlike the conventional method in which the density was varied, the length of the loose and dense repeats is not limited by the weaving width of the loom or the size of the reed grain, and it can be manufactured in a labor-saving manner, so there is no increase in production costs. It is economically advantageous.

As described above, the present invention can provide a revolutionary woven fabric unprecedented in the past, a new weaving method for producing the woven fabric, and a new type of loom for rationally weaving such a woven fabric. , its industrial utility value can be said to be extremely large.

[Brief explanation of drawings]

Figure 1 is an external view of the loom (Airjet Tom), Figure 2 is a schematic mechanical diagram of the loom, Figure 3 is an explanatory diagram of the mechanism of the cloth feeding device installed in conventional looms, and Figure 4 is the invention of the present invention. A mechanical diagram of a first configuration example in which the rotational speed of a friction roller in a loom is controlled by an eccentric gear type transmission, and FIG. 5 is a mechanical diagram of a second configuration example in which the rotational speed of the friction roller in the loom is controlled by a scroll gear type transmission. , Fig. 6 is a mechanical diagram of a third configuration example in which the rotational speed of the friction roller is controlled by a three-step scroll gear type transmission, and Fig. 7 is a mechanism diagram in which the rotational speed of the friction roller is controlled by a variable diameter pulley type belt transmission transmission. FIG. 8 is a mechanical diagram of a fourth configuration example in which speed change is controlled; FIG. A plan view schematically showing the appearance of the cloth surface of the first embodiment of the cloth,
FIG. 10 is a plan view schematically showing the surface appearance of the second embodiment of the woven fabric of the present invention, and FIG. 11 is a plan view schematically showing the surface appearance of the third embodiment of the woven fabric of the present invention. 12 are plan views schematically showing the appearance of the fabric surface of a fourth embodiment of the woven fabric of the present invention (the warp yarn density is also arranged sparsely and densely). DESCRIPTION OF SYMBOLS 1... Warp beam, 2... Belt, 3... Weft insertion device, 4... Lead, 5... Friction roller, (5, 61, 62)... Fabric feeding device, 7...Transmission device, 8...Cross roller. B... Beating line, C... Woven fabric, W...
Warp, Y...Weft. Patent Applicant: Limited Liability Company Hashizume Kenkyushoma Daiwa Textile Industry Limited Agent Patent Attorney Koji Togawa S4 Figure 5 Figure 6 Figure 9 Figure 10 Figure 11 Figure 12

Claims (7)

[Claims] (1) In a woven fabric formed by cross-inserting weft yarns Y, Y, etc. into warp yarns W, W, etc.; a weft yarn characterized in that the insertion density of the weft yarns Y is arbitrarily varied in density or density. A woven fabric with varying density. (2) The woven fabric according to claim 1, wherein the density of the warp yarns W, W, etc. is also varied in density. (3) Warp threads W/W supplied from warp beam 1...
In a weaving method in which a woven fabric is obtained by inserting a weft Y into the warp shedding while performing a shedding operation at a predetermined timing; 5. A method for weaving a woven fabric having a change in weft density, characterized in that the speed is changed rapidly by changing the rotational speed. (4) A warp beam 1 for supplying the warp threads W, W, etc. that are to form the warp structure of the woven fabric; vertically dividing each of the warp threads W, W, ... supplied from this warp beam. and a weft insertion device 3 that inserts the weft Y into the opening formed by the heddles;
A lead 4 that beats the inserted weft yarn Y to a beating line B to form a woven fabric C; a friction roller 5 that feeds the woven fabric C; and a guide roller 61 that presses the woven fabric C against the friction roller 5. - A cloth feeding device (5, 61, 62) consisting of 62; a transmission device 7 that controls the rotational speed of the friction roller 5; and a cloth that winds up the woven fabric C fed through the cloth feeding device. A loom for weaving a woven fabric with varying weft density, the loom comprising a roll 7. (5) A loom for weaving a woven fabric with varying weft density according to claim (4), wherein the transmission device 7 that controls the rotational speed of the friction roller 5 is constituted by a variable speed transmission mechanism including a deformable gear. . (6) Weaving the woven fabric with varying weft density according to claim (4), wherein the transmission device 7 for controlling the rotational speed of the friction roller 5 is constituted by a variable speed belt transmission mechanism including a variable diameter pulley. loom. (7) The friction roller 5 is rotationally driven by a servo motor, and the transmission device 7 is an electric circuit that electrically controls the rotational speed of the servo motor. A loom that weaves a variety of woven fabrics.