JPS6377484A - Method and apparatus for sewing cloth cylinder and rubber knitted cylinder - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3-1 Purpose of the Invention 3-1-1 Field of Industrial Application The invention c (hereinafter abbreviated as "the present invention") pertaining to this patent application is applied to clothing such as training wear.

In order to be used for cuffs and hem openings of lower clothing, a rubber knitted tube with an outer diameter smaller than the inner diameter and woven with rubber in the form of vertical lines is attached to the inner surface of a fabric tube made of stretchable knit fabric. Insert the tubes, and use an O-Ku-Lock sewing machine to overlock and sew the fabric tubes on both ends, making sure that the diameters of both tubes match. This invention relates to a technique for forming a rubber knitted tube by turning the inside surface into an outside surface so that the rubber knitted tube projects outward in the longitudinal direction from the fabric tube so as to be suitable for the cuffs and hem opening of the above-mentioned garments, and in particular, a method for sewing both tubes together. and equipment.

3-1-2 Conventional technology In the past, as shown in Patent Application No. 154899 filed in 1985 by the applicant for the patent of the present invention, fabric tubes and elastic combs with a smaller diameter than the cloth tubes have been used. With the knitted tube in a horizontal position, polymerize the rubber knitted tube by soaking a part of the inner side of the fabric tube so that both ends of both tubes meet, and then fold the rubber knitted tube so that the rubber knitted tube is larger than its natural diameter. While expanding horizontally from the inside to the outside, both ends of both tubes are sutured.

However, in its natural state, the diameter of the fabric tube is 1.8 to 2 times larger than the diameter of the rubber knitted tube, so most of the fabric tube except for one edge sag due to its weight.
Due to the intermittent cloth feed motion by the cloth feed teeth of the sewing machine, the drooping part of the cloth tube and its surrounding area undergoes violent vertical movement, and the intermittent back and forth movement of the cloth feed causes horizontal vibration.

Therefore, one end edge of the fabric tube to be sewn repeatedly moves violently to the left and right, in and out of the stitching position with a needle in the fabric feeding direction of the sewing machine, causing meandering. This has caused defects such as misalignment of the seam or stitching deeper than the required seam allowance, which reduces the quality of the seam of the product.

3-1-3 Problems to be Solved by the Invention The present invention solves the following problems: 1) Gravity acts such that the fabric tube is taut and is lifted by the inside of the fabric tube in connection with the shrinkage of the diameter due to the sewing machine. Bringing the working body into contact with the inside of the drooping part of the fabric tube, 2) Sewing both ends of both tubes together while swarming the fabric tube so that the diameter of the fabric tube matches the diameter of the rubber knit tube, 3) By configuring the gravity acting body to separate from the fabric tube just before the diameter of the fabric tube approaches the diameter of the rubber knit tube, the defects of the conventional technology mentioned above are resolved and the quality of sewing is improved. The purpose is to

3-2 Structure of the invention 3-2-1 Means for solving the problem 3-2-1
-1 Background of the Invention (Summary) The present invention, in order to be used for cuffs, etc., inserts a rubber knitted tube having an inner diameter edge and a small outer diameter into the inner surface of a fabric tube, and overlocks both edges of both tubes. 1) Sewing the fabric tube so that the diameter of the fabric tube matches the diameter of the rubber knitted tube by shirring stitching only on the fabric tube.
2) placing a gravity acting body in contact with the inside of the drooping portion of the fabric tube such that the fabric tube is taut and raised by the inside of the fabric tube in conjunction with the contraction in diameter due to the sewing machine;
Feature 3-2-1-2 Structure of the Invention Implementation of the Invention, characterized in that the gravity acting body is configured to separate from the fabric tube just before the diameter of the fabric tube approaches the diameter of the rubber knit tube. An example will be described below with reference to the drawings.

In FIG. 1, a sewing machine 1 has a needle 2 that moves up and down and carries a thread.
The presser foot 3 is configured to form an overlock seam at the edge of the cloth by means of a louver, a cloth feed dog, etc. (not shown) below them, and the presser foot 3 in the cloth feed direction shown by the arrow.
A shirring device 4 is provided in front of the upper and lower fabrics to feed the fabric while shrinking or folding only the upper and lower fabrics of the overlapping upper and lower fabrics, and a fixed arm 5 with a rectangular cross section that protrudes toward the left side is attached and fixed. This creates a so-called free arm overlock sewing machine.

On a horizontal table 6 on which the sewing machine 1 is fixed, a cylinder 7 with a built-in piston that is operated by supplying and discharging fluid is horizontally fixed so that it approaches the sewing machine from the front to the front along the cloth feeding direction shown by the arrow. The right end of a movable arm 9 which always approaches the fixed arm 5 and whose left end is a free end is rotatably supported at the front end of the rod 8 which protrudes forward from the piston in the movable arm 9. The middle portion is rotatably supported on a vertical shaft 10 fixed to the table 1.

A shaft 11 is fixed to the table 6 horizontally, facing the sewing machine 1 from the right in front of it parallel to the cloth feeding direction indicated by the arrow.
A bearing 12 is slidably supported on the outer periphery of the shaft 11.

A shaft 15 that is horizontally orthogonal to the shaft 11 is fixed to the front bearing 12 and the drive body 14 that is fitted in a groove 13 provided on the left side of the table 6 in parallel to the cloth feeding direction so as to be slidable left and right and front and back.

A flange 16 fixed to the middle of the left and right sides of the shaft 15 and the flange 12
In this case, a cylinder 17 containing a piston that operates by supplying and discharging fluid is fixed horizontally parallel to the shaft 15, and the piston of the cylinder 17 has a left end of a rod 18 that protrudes to the left when the piston moves to the left. to the driving body.

An arm 19 that projects forward is fixed to the left of the driving body 14, and a shaft 20 that is horizontally orthogonal to the arm 19 is fixed to the middle of the arm 19 and projects to the left.
The arm 21 parallel to the axis 1 is fixed, and the front end VC of the arm 21 is
A roller 22 parallel to the arm 19 and projecting to the left is supported rotatably around its own axis, and a switch 23 projecting to the left and perpendicular to the arm 21 is fixed to the arm 19 at the front end of the arm 19 so as to be horizontal. Supporting, between the switch 23 of the arm 19 and the shaft 20,
A cylinder 24 having a built-in piston that operates by supplying and discharging fluid is fixed to the arm 19 and supported horizontally.
A rod 25 is fixed to the piston 4 so as to protrude to the left by moving the rod 25 to the left.

switch 23 and cylinder 24. The roller 22 is connected to the cylinder 17 by the action of electromagnetic pulp on the cylinder 24 as the roller 22 contacts the switch 23 by rotating upward against the gravity around the axis 20 of the arm 21. After fluid is supplied, the piston moves to the left, and the rod 25 projects to the left below the arm 21 and supports the arm 21, fluid is supplied to the cylinder 17 by the action of the electromagnetic pulp, the piston moves to the right, and the rod 18 moves to the left. With the movement to the right, the driver 14 moves the cylinder 24 . through the right movement of the bowl 19 .
Switch 23. Axis 20. An electric circuit is provided to close the circuit so that the roller 22 moves to the right together with the arm 21, and when the electric rotation starts, each part acts in the opposite direction to the above and moves to the left. It is configured to rotate downward by gravity around the center.

3-2-2 Operation of the Invention The present invention is constructed to operate in the following order based on the above structure.

1) By discharging the fluid in the cylinder 7 and moving the piston forward, the rod 8 is moved forward and the moving arm 9
It is rotated clockwise in FIG. 1 about the vertical axis 10, and placed close to and parallel to the fixed arm 5.

2) The arm 9 moves the elastic knitted rubber tube 26 in the circumferential direction.
A fabric cylinder 27 that is longer (and has a larger diameter) than the rubber knit section 26, such as a stretchable knit fabric, is superimposed on the outer peripheral surface of the rubber knit section 26, and the arms 5 and 9 are re-attached. The cylinders are surrounded and supported, and the right edges of both cylinders are aligned vertically, and the vicinity of the right ends are arranged corresponding to the needle 2°, the presser foot 3, and the scorching device 4 of the sewing machine 1.

3) As shown in Fig. 1.2, supply fluid to the cylinder 24 and project the rod 25 to the left to support the arm 21 in a raised state, so that the rod 22 supports the inside of the fabric tube 27 in front of it. , the fluid in the cylinder 17 is discharged, the port 18 is moved to the left, and the roller 22 is moved to the left.

4) As shown in Figure 1, by supplying fluid to the cylinder 7 and moving the piston forward, the rod 8 is moved forward and the moving arm 9 is rotated counterclockwise around the vertical axis 10. The rubber knitted tube 26 is moved and separated from the fixation toward the front, and both tubes are horizontally expanded toward the front from the inside to the outside so that the rubber knitted tube 26 is slightly larger than its natural diameter and a part of the fabric tube hangs down.

5) As shown in Fig. 3.5, by discharging the fluid in the cylinder 24 and moving the rod 25 to the right to release the support of 21, the arm 21 is moved by gravity around the axis 20 with the roller 22. It rotates downward, and the roller 22 descends and presses the hanging part of the fabric tube 27 downward, and the fabric tube 27 becomes taut.

6) As shown in Fig. 6, operate the sewing machine 1 to remove the rubber knitting tube 26
While feeding the fabric tube 27, use a shaving machine to sew one end edge of the fabric tube 27 to be sewn to the rubber knit tube 26 so that the diameter of the one end edge of the fabric tube 27 matches the diameter of the rubber knit tube 26. 4, while continuing to sew one end edge of both cylinders together, the roller 22 resists the gravity due to its weight and contacts the inner surface of the fabric cylinder 27 due to the diameter contraction of the fabric cylinder 27, and moves in the cloth feeding direction. rise in front of.

7) As shown in Fig. 7, the roller 22 rises and then comes into contact with the lower surface of the rubber knit tube 26, and if sewing continues, it moves from the front of the rubber knit tube 26 to the top, and both tubes As shown in Fig. 4-7, immediately before the roller 22 contacts the lower surface of the rubber cylinder 26, the arm of the roller 22 is 2
1 contacts the switch 23, fluid is supplied to the cylinder 24 through the electric circuit, the piston moves to the left, the rod 25 projects to the left below the arm 21, and the arm 21
After supporting the cylinder, fluid is supplied to the cylinder, the piston moves to the right, and the rod 18 moves to the right, and the driver 14 moves the arm 19 to the right to move the cylinder 24. Switch 23. Along with the shaft 20° arm 21, the roller 22 also moves to the right and escapes from the inner peripheral surface of the fabric tube 27 to the right.

8) Continue sewing the ends of both ends of the rubber knit tube 26 and fabric tube 27, and stop the sewing machine 1 when the diameters of both coincide.

9) To adjust the raised position of the roller 22, switch 23. The cylinder 24 is moved and stopped appropriately along the arm 19.

3-2-3 Other embodiments In order to adjust the raised position of the roller 22, a switch 23 is used.
and the cylinder 24 may be movable and lockable along the arm 19, and the cylinder 7, 17, 24 may be an electromagnetic solenoid by the action of electromagnetic force. Since it has the following effects, it has the following effects.

1) The fabric tube 27, which has a larger diameter than the rubber knitting tube 26, is fixed near the seam part of the sewing machine 1, is tensioned by a moving roller 5.9, and is supported by being pressed by the presser foot 3.
Since the lower part hangs down due to the gravity due to the weight, during sewing, the intermittent cloth feeding movement by the cloth feeding teeth causes intense vibrations in the vicinity of the hanging part, such as vertical and horizontal movements, and the rubber knitted tube 26
The end edge to be sewn with the needle tries to meander by causing a violent reciprocating motion in the left and right directions and inside and outside, but the roller 22 and the weight of the arm 21 come in contact with the inside of the drooping part of the fabric tube 27, and gravity acts on it. Therefore, the hanging part does not vibrate and one end edge does not meander, so the fabric tube 27. to be sewn can be sewn together. One end edge of the rubber knit tube 26 is not sewn by the needle 2 or is sewn deeper than the required seam allowance, and is sewn accurately in a straight line along the cloth feeding direction while maintaining the required seam allowance, thereby creating a sewn product. Improves spelling quality.

2) When the sewing progresses until the diameter of the fabric tube 27 approaches the diameter of the rubber knit tube 26, the roller 22, which contacts the drooping part of the fabric tube 27 and applies the action of gravity, is separated from the fabric tube 27. , the roller 22 is connected to the rubber knitted tube 26 and the fabric tube 2.
7, and the sewn portion of the roller 22 and the sewing machine 1 will not collide and break.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the whole as seen from the front left, Figure 2.3.4 is a plan view of the main part seen from above, and Figure 4.5.6 is the main part of Figure 1 seen from the left. FIG.

Claims (2)

[Claims] (1) A. Place the stretchable fabric tube and the elastic knitted rubber tube, which is smaller in diameter and shorter than the elastic tube, in a horizontal position, and align the inner peripheral surface of the fabric tube so that both edges of both tubes match. The rubber knitted tube is polymerized along the opening, and both tubes are expanded horizontally from the inside to the outside so that the rubber knitted tube is slightly larger than its natural diameter and a part of the fabric tube hangs down. C. Apply gravity from the outside by contacting the inner circumferential surface of the drooping part of the fabric tube so that the fabric tube tensions and rises due to the inner circumferential surface of the fabric tube in connection with the contraction of its diameter; D. While shrinking one end edge of the fabric tube, continue to sew one end edge of both tubes together using a sewing machine so that the diameter of one end edge of the fabric tube matches the diameter of the rubber knit tube. The fabric tube is characterized in that the action of gravity is removed from the fabric tube when the fabric tube approaches . and the method of suturing it with a rubber knitted tube. (2) Place the stretchable fabric tube and the elastic knitted rubber tube, which is smaller in diameter and shorter than the elastic tube, in a horizontal state, and align the tube along a part of the inner circumferential surface of the fabric tube so that both edges of both tubes coincide. Polymerize the rubber knitted tubes, expand both tubes horizontally from the inside to the outside so that the rubber knitted tube is slightly larger than its natural diameter, and a part of the fabric tube hangs down, and one end edge of the fabric tube is One end edge of the fabric tube is contracted and one end edge of both tubes are sewn together using a sewing machine so that the diameter of the fabric tube matches the diameter of the rubber knit tube. (c) A fixed arm that protrudes horizontally from the sewing machine sewing section perpendicular to the fabric feeding direction and is fixed; (d) A fixed arm that is always approached in parallel with the fixed arm. a movable arm capable of being separated from and stopped; and (e) connected to the inner circumferential surface of the drooping part of the fabric tube so that the fabric tube is tensioned and raised by the inner circumferential surface of the fabric tube in connection with the contraction of its diameter. A fabric tube, comprising: a roller for applying gravity; and (f) a cylinder for actuating the roller to separate the roller from the fabric tube in relation to the diameter of the fabric tube approaching the diameter of the rubber knit tube. and a suturing device with a rubber knitted tube.