JPH0219564A - Jointing of cloth by jet flow and device therefor - Google Patents

Abstract

PURPOSE:To fasten binding between plural cloths and prevent wetting of environmental cloths by simultaneously injecting high-pressure fluid to same place of stacked plural cloths from both sides, then sucking and ejecting scattered fluid. CONSTITUTION:Plural cloths 1a and 1b are stacked directly or through yarn for jointing and said cloths are held by holding frame 9. Next, high-pressure fluid (liquid or mixture of gas and liquid) is injected to both faces of desired place in said stacked plural cloths 1a and 1b. Then, scattered fluid is sucked and ejected by cover 8 and suction tube 7, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for stitching fabric using a jet stream of a high-pressure liquid or gas-liquid mixed fluid.

[Prior Art] In an automatic sewing system that automatically stitches cut fabrics to produce parts and automatically assembles the parts, it is necessary to reduce the operation of a manipulator required for material hand linking of cut fabrics and parts. As a countermeasure for this, the frequency of temporary suturing operations will inevitably increase, and further improvements are required in the accuracy of these operations. In the conventional sewing process, a large sewing machine with a complicated mechanism is usually used for temporary stitching and lock stitching. Using a large number of conventional sewing machine mechanisms as temporary suturing means in an automatic sewing process will inevitably increase the burden on the software and heart aspects of the entire system due to the complexity of the mechanisms. Therefore, it is desired to develop a suturing mechanism which is a simplified mechanism and can sufficiently cope with suturing along a curved line or curved surface.

To address these problems, the present inventors investigated a method for developing a simplified suturing mechanism suitable for suturing operations, and disclosed the results in Japanese Patent Application Laid-Open No. 60-259669. ing.

In this previously proposed method, a plurality of fabrics to be sewn are placed in close contact with a holding plate, and the fabric is attached to the stitching fibers extending from the fabric itself or the stitching fibers placed on the #a object. A high-pressure fluid is ejected from above as a narrow jet stream,
The stitching fibers that have been affected by the jet flow enter and entangle the fabrics in the lower layer, and the fabrics are sewn together.

In this method, the holding plate for the fabric acts as a reflecting plate for the jet stream, and when the jet stream sprayed onto the fabric on one reflecting plate collides with the reflecting plate, severe turbulence of the jet stream occurs, and this jet stream is The basic operation is to intertwine the stitching fibers in the fabric by the action of flow turbulence, thereby performing stitching.

It has been confirmed that the previously proposed method can achieve suturing effects equivalent to temporary suturing and lock stitching, but
Since water is used, it is necessary to eliminate the effects of wetness and dirt, and it is desired to be able to perform effective suturing under conditions that allow easy elimination of the water used.

In order to obtain high suture strength in such sutures,
It is essential for a fluid suturing mechanism to provide a mechanism that causes a sudden change in the jet flow in the fabric, such as the reflector described in E. However, when N-coupling is performed, wetting of the fabric is in a state where the water on the fabric or the reflective plate is wiped off, so it is presumed that this is due to the water cover interposed on the reflective plate, which suppresses this wetting. From this point of view, a mechanism that does not require a reflector is desired.

[Problems to be Solved by the Invention] A technical problem to be solved by the present invention is to provide a mechanism for causing a sudden flow change in the jet flow corresponding to the reflector plate, or to provide a mechanism for causing a sudden flow change in the jet flow corresponding to the reflecting plate, in order to obtain high suture strength. To provide a suturing method and device which does not promote wetting of cloth.

[Means for Solving the Problems] In order to solve the above problems, the suturing method of the present invention involves holding a plurality of cloths in a stacked state, each of which uses fibers of the cloth itself or separately added fibers as the suture fibers. , While injecting high-pressure liquid or gas-liquid mixed fluid as a thin jet stream onto these cloths, the injection position relative to the cloth is moved,
In the suturing method in which multiple pieces of cloth are sutured by entangling the suture fibers with the cloth using the acting force of the shet flow, the jet flow is injected in the same amount from both the front and back sides of the laminated cloth, At the same time, it is characterized by suctioning and discharging the liquid scattered by the jet from the surrounding area.

Further, the suturing device of the present invention is a means for holding a plurality of cloths in a laminated state, each of which has fibers of the cloth itself or separately added fibers as intertwining fibers.

A suturing device comprising a jet jet spraying means for spraying a high-pressure liquid or gas-liquid mixed fluid as a thin jet stream from a nozzle onto these cloths, and a means for relatively moving the spraying position from the nozzle onto the cloth. In this method, the nozzles are arranged so as to spray the same amount from the surface side of the A-layered cloth, and the periphery of these nozzles is connected to a suction and discharge device for suctioning and discharging the scattered liquid. It is constructed by covering it with a communicating cover.

Cloths that can be sewn by the method and device of the present invention include:
Various types of fabrics commonly used for clothing and their equivalents can be mentioned. Of course, these include towels, lace, mesh, and non-woven fabrics. In addition, especially when the fabric itself accommodates the ta fibers for suturing, such as cloth with fuzzy fibers or cloth woven in a pile shape, it is necessary to separately prepare and add one fiber for suture. The jet flow of the high pressure fluid is generally 300~
Water pressurized to about 1000 kgf/fiber is
The conditions are selected depending on whether the material is sprayed from a nozzle having an inner diameter of about 5 to 0.1 fibers, or depending on the properties of the fabrics to be sewn and the fibers for stitching to be entangled therewith.

In addition, even if the jet stream from the nozzle is ejected intermittently,
It may be ejected continuously, and liquids such as water are generally used as the ejected fluid, but gas-liquid mixtures such as mist of water droplets are also effective. It is.

[Function] When cloth having suture fibers is laminated and a high-pressure jet stream is ejected from nozzles on both the front and back surfaces, the jet stream acts on the suture fibers from the front and back of the fabric, destroying those fibers. Entangle the fabrics with each other or with them, thereby stitching the laminated fabrics together. In this case, the jet streams that collide with the surface of the fabric are scattered there, but in particular, the upper and lower jet streams that have penetrated deeply into the left circle are sprayed onto the same amount of the fabric, so they are mutually at high speed. Collision,
It scatters vigorously around the area. Therefore, there is little liquid remaining in the left circle, and most of it scatters around, and is discharged to the outside through the suction and discharge device from within the cover that covers the periphery of the nozzle.

[Example] Figure M41 shows an example of the suturing device according to the present invention.

This suturing device stacks a plurality of sheets *1a, lb to be sutured and sutures them using a high-pressure jet stream.
A jet jet spraying means 4.4 is held that sprays a high-pressure liquid or gas-liquid mixed fluid as a thin jet stream from both the front and back surfaces of the stacked Ir 11 a and 1 b. These jet stream injection means 4 are arranged to face each other so as to spray the same amount from both the front and back surfaces of the mmM cloths 1a and 1b via a high-pressure pipe 5 to a high-pressure generating device (not shown). . In addition, the surrounding area of those nozzles 6.6 is
It is covered with a cover 8 which is connected to a suction and discharge device (not shown) through a suction pipe 7.

As a means of holding the plurality of cloths 1a and lb to be sewn in a stacked state, the cloths may be kept under a certain tension and their periphery held by the cloth holding frame 9, or when the cloths are long In the case of a shaku, both ends of the cloth may be held by rollers to apply appropriate tension to the cloth.

In order to fit the cloths 1a and 1bftM together, it is necessary to relatively move the injection position of the jet stream ejected from the nozzle 6.6, and as a means for that purpose, the support frame 2 can be controlled in movement in a horizontal plane, or It is also possible to hold the support frame 2 in a fixed state and to control the movements of the holding members of the cloths 1a and lb within a horizontal plane.

Multiple sheets *1a stacked by such suture # position,
When sewing 1b, the cloth itself or fuzz or other #al
&, and if it can be used as a suture fiber, a high-pressure jet stream can be applied directly to the fabric, but the fabric itself does not have suture fibers or has only a few suture fibers. In some cases, sewing fibers are added separately to both the front and back sides of the cloth,
A jet stream is ejected from above these TA fibers. This shet style stitching can be applied to various types of fabrics commonly used for clothing.

As for the jet flow, it is desirable to pressurize water in a high-pressure generator and eject it from a nozzle 6.6 through a high-pressure pipe 5.5 as a jet of water, or as a mist by mixing air therein. 300~
Water pressurized to about 1000 kgf/Cmff1 is
．． It is injected from a nozzle with an inner diameter of 0.05 to 0.1 tsa degrees.

Since the injection position of the jet stream from the nozzle 6.6 is not moved relative to the cloths 1a and 1b, the cloth 1a and the cloth 1b are
, due to the acting force of the jet stream sprayed on both the front and back surfaces of 1b,
For suture w & male to each other or them with cloth la, lb
This is done by entangling the In this case, cloth 1a
The jet streams that collide with the surface of , lb are scattered there, but in particular, the upper and lower jet streams that have penetrated deeply into the city are injected to the same amount on the cloth, so they are mutually at high speed. It collides and scatters into the surrounding area. Therefore, *1
There is very little liquid remaining in a and lb, and most of it will be scattered around.

At the same time as this suturing operation, the inside of the cover 8.8 that covers the periphery of both nozzles 6.6 is suctioned and exhausted to the outside by the suction and discharge device, so that the above-mentioned scattered liquid is discharged to the outside through the suction tube 7. .

Next, an experimental example in which cloth was sewn using the method and apparatus of the present invention will be described.

Table 1 shows the specifications of the cloth used in the experiment.

24cm x cut with the warp direction of the first surface fabric as the longitudinal direction
Layer two pieces of 6.5cm cut cloth and cut between the pair of upper and lower nozzles 6.6 shown in Figure 1! 10 gf in the length direction of the Ir cloth
6./cm of tension and horizontally install the upper and lower nozzles.
While maintaining the opposing state of 6 and spouting a high pressure jet stream,
The nozzle was run in a straight line in the length direction of the cut fabric (that is, the warp direction of the fabric), and the relationship between the moving speed of the cut fabric nozzle, sewing force, and water retention was determined in the sewing experiment. It was set in four stages ranging from 1 m/win to 5 +w/win. The suction force at the suction port of the suction tube 7 is 25 gf/c.

From the cut fabric after the stitching process, the width direction is the seam-like line (1st knot line) created by the action of the jet stream, and ＠
A sample with a length of 3 cm and a length of 6.5 c++ was prepared, and the suture strength was measured by a T test. The water retention amount was measured on the cut fabric (24 cm x 6.5 cg+) immediately after the suturing treatment, and the difference in weight of the cut fabric after the ta association treatment pretreatment was calculated by converting it into suture line I Cff1 dust.

The suture characteristics obtained through experiments are shown below.

Jet treatment was performed under the conditions of a nozzle diameter of 0.06 m1 and a jet injection pressure of 600 kgf/fiber' for the conventional method in which a jet stream is applied from one direction and a reflecting plate is provided on the opposite side, and the method of the present invention described above. FIGS. 2 and 3 show the relationship between the suturing force, the water retention amount, and the nozzle moving speed in the case of 0. It can be seen that the method of the present invention can obtain a much larger suturing force than the conventional method.

As can be seen from Figure 2, the stitching strength obtained by the action of the jet flow decreases as the nozzle moving speed increases. The temporary M bonding strength required for transfer by a conveyor is approximately 20 gf/c, and the stitching speed (nozzle movement speed) obtained under this condition is the same as that for a shet injection with a nozzle diameter of 0.06 mm as shown in the figure. pressure 600
In the case of kgf/cm', it is predicted to be about 10 m/min from experimental values.

In addition, the water retention rate obtained from the sample treated by the method of the present invention is not affected by the nozzle moving speed and is a constant value (5 mg/c + *), and the water retention rate obtained from the sample treated by the method of the present invention is a constant value (5 mg/c + *). 311g/c in the case of a method that passes through
The value is close to 11.

The flow damages the fabric. In measuring the tensile strength retention rate of samples jet-treated using conventional methods under various conditions, the jet injection pressure at which the sample is not damaged by jet treatment is SOOkgf/ for a nozzle diameter of 0.06 to 0.08 mm. cm” or less, nozzle diameter 0.101m1
On the other hand, in the method of the present invention, in which a jet stream is injected onto both the front and back sides of laminated cloth, the thickness range that is affected by the jet stream is within the range of 40 Ukgf/cm'' or less. It can be made shallower than the conventional method, and damage to the fabric can be prevented.

[Effects of the Invention] According to the method and apparatus of the present invention detailed above, a jet stream is ejected from both the front and back sides of the A-layered cloth, without using the reflective plate used in the conventional method. Since we created a sudden change in the jet flow,
It is possible to prevent the cloth from getting wet as much as possible, and to obtain high seam strength.In addition, because conventionally the jet was sprayed on one side of the uI-layered cloth, the jet flow effected the entire thickness of the cloth. However, since the present invention sprays from both sides of the fabric, the pressure can be lowered, thereby reducing damage to the fabric.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of a cloth suturing device according to the present invention, and FIGS. 2 and 3 are explanatory diagrams showing experimental results regarding the method of the present invention. la, lb...cloth, 4...jet stream injection means. 6...Nozzle, 8...Cover il Fig. Nozzle'LMbga1ga [(m/m1n)" Fig. Nozzle movement speed (m/min)

Claims (1)

[Claims] 1. A plurality of cloths in which the fibers of the cloth itself or separately added fibers are used as suture fibers are held in a stacked state, and a high-pressure liquid or gas-liquid mixed fluid is applied to these cloths. In a suturing method in which a plurality of cloths are sutured by moving the jetting position relative to the cloth while injecting the same as a thin jet stream, and entangling the suture fibers with the cloth by the acting force of the jet stream,
A method for suturing cloth using a jet stream, characterized in that the jet stream is sprayed in the same amount from both the front and back sides of the laminated fabric, and at the same time, the liquid scattered by the spray is sucked and discharged from the surrounding area. 2. A means for holding multiple pieces of cloth in a laminated state, each of which has fibers of the cloth itself or separately added fibers as fibers for entanglement, and a method of holding high-pressure liquid or gas-liquid mixed fluid from a nozzle to these cloths in a thin manner. A suturing device equipped with a jet stream spraying means for spraying a jet stream, and a means for relatively moving the spray position of the spray from the nozzle to the cloth, wherein the nozzle sprays the jet stream to the same position from both the front and back sides of the laminated cloth. A cloth suturing device using a jet flow, characterized in that the periphery of these nozzles is covered with a cover that communicates with a suction and discharge device for suctioning and discharging the scattered liquid.