JPS6037104Y2 - Welt cloth folding device in automatic welt sewing machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an industrial and commercial folding device in an automatic welt sewing machine.

Conventionally, the one shown in FIG. 1 has been known as this type of industrial and commercial folding apparatus 1.

This industrial/commercial folding device 1 includes an industrial/commercial foot 3 supported on a bed surface so as to be movable up and down, and an industrial/commercial board 2 for industrial/commercial molding extending in the industrial/commercial transport direction X with a fixed width fixed to the lower part of the industrial/commercial foot 3. and a rotating shaft 5 rotatably supported by a bushing 4 fixed to the upper part of the industrial and commercial foot 3;
The proximal end is fitted and fixed to both ends of the ball guide piece 6a,
It is composed of a pair of industrial and commercial guide arms 6.6 having 6a, and an industrial and commercial guide 8 that is fixed to the upper part of the industrial and commercial legs 3 and includes a leaf spring 7 that presses the upper surface of the industrial and commercial guide arms 6.6.

In the industrial and commercial guide 8, the industrial and commercial guide 8 wraps around the industrial and commercial board 2 in an inverted T shape, and in this state, only the industrial and commercial guide 8 slides on the industrial and commercial board 2 in the X direction. When moving to the other side together with the body fabric and flap fabric, which will be described later, and sewing them together, 1. 1. on both sides of the needle so that K2 can be sutured while being held almost perpendicularly between the needle drop path and the needle. This is to guide you through 2.

However, in this industrial and commercial folding device 1, the industrial and commercial board 2 has side edges 2a, 2 as shown in FIG.
b were formed parallel to each other.

That is, the front end width 2A and the rear end width 2B of the industrial and commercial board 20 were formed to have the same length.

For this reason, when the industrial and commercial k is slid in the X direction while wrapped around these side edges 2a and 2b, the horizontal finish of the industrial and commercial
The disadvantage was that wrinkles occurred and Kogyo K did not have a beautiful finish.

This invention aims to solve these drawbacks.

An embodiment of this invention will be described below with reference to the drawings.

Incidentally, the same configurations as those of the conventional example are given the same reference numerals.

FIG. 2 shows an automatic welt sewing machine equipped with an embodiment of this invention.

In the figure, 20 is the needle of the sewing machine N installed in the middle of the bed surface 11, 21 is a fabric edge detection device installed at the front of the arm of the sewing machine 20 at a constant distance from the needle N, and 22 is the needle of the sewing machine 20. A center knife that operates to cut cloth in conjunction with needle N.

Reference numeral 23 denotes a commercial and commercial folding device comprising a commercial and commercial foot 26 and an upper cloth substrate 27 that can be moved up and down from the chain line position in FIG.

The upper fabric substrate 27 of this industrial and commercial folding device 23 is shaped so that its width gradually increases along the industrial and commercial transport direction X, as shown in FIG.

That is, in this embodiment, the front end width 27A of the upper cloth substrate 27
The front end width 27A is approximately 17 FL/ compared to the rear end width 27B.
It is formed so that it is about rrL long.

28. 28 is an industrial and commercial folding device 23 as shown in Fig. 4.
A rotating shaft 29 rotatably supported on the upper part of the industrial/commercial foot 26, and a pair of industrial/commercial guides rotatably supported by step screws 30 and 30 provided along an axis that intersects the axis of the rotating shaft 29. The arm has an upper cloth guide piece 31.31 at its tip.

S is a spring as an elastic body provided between the industrial and commercial guide arms 28, 28;
acts in the direction of proximity.

Incidentally, as shown in FIG. 5, the stepped screws 30, 30 may be provided on the rotating shaft 29 in parallel with the upper cloth substrate 27, and the industrial and commercial guide arms 28, 28 may be rotatably supported thereon.

Next, the cloth conveying device 33 will be explained.

As shown in FIG. 2, the cloth conveyance device 32 is configured to reciprocate in conjunction with a pulse motor PM from a first position where the needle N is held between the needles N to a second position shown by a solid line in the figure.

This cloth conveying device 8 has a pair of clamp arms 33.3.
3, a first clamp plate 34.34 fixed to the free end of this clamp arm 33.33, and a receiving plate 35 fixedly disposed above the first clamp plate 34.34 (see FIG. 6).
35, a pair of folding plates 37.37 arranged between the first clamp plates 34, 34 and the receiving plates 35, 35 and horizontally reciprocated by the operation of the air cylinder 36, and a spring 38. Due to the action, it is in the state shown by the chain line in Figure 7,
When the air cylinder 39.39 operates, the spring 3
It consists of a pair of flap pressers 40.degree. 40 which are adapted to press the receiving plate 35.35 against the pressure 8.38.

Incidentally, a light reflecting section (not shown) is provided on the folding plates 37, 37.

In addition, 40a and 40a are flap presser feet 40, 4
This is a light transmission hole for a cloth edge detection device (described later), which is drilled at 0.

A needle drop hole 41.41 having a desired width is bored in the needle N side peripheral end of the folding plate 37.37 along the moving direction of the fabric conveying device 32.

As a result, the area around the sewing point is the folding board 37 during the sewing.
．． 37.

Further, the flap presser 40.4 of this cloth conveying device 32
Needle drop holes 42 and 42 having a desired width are also formed at the peripheral end of the needle N side of the needle 0 along the moving direction of the fabric conveying device 32.

As a result, the area around the stitching point of the flap cloth F is pressed by the flap presser foot 40, 40 during stitching.

The relationship between this cloth conveying device 32 and the folding device 23 is such that when the cloth conveying device 32 is located at the first position, the body fabric M is inserted and a suitable foot pedal (not shown) is depressed to the first step, the air cylinder 33a is actuated and each clamp arm 33, 33 rotates, thereby lowering the first clamp plate 34, 34. and press the body material M.

(See Figure 7) Next, insert the Kosho K so that its center is located between the inner edges of the first clamp plate 34, 34, and depress the foot pedal to the second stage to create a folding device. After the folding legs 26 of 23 descend between the inner edges of the first clamping plates 34.34 and pressing the center of the first clamping plates 34.34 onto the body fabric M, the air cylinder 36 is actuated to clamp the folding plates 37.3
7 from the chain line in FIG. 7 to the solid line, and bend the left and right sides of the industrial and commercial foot 26 into an inverted T-shape along the periphery of the industrial and commercial foot 26 as shown in FIG.

At this time, since the folding plate 37.27 has a needle drop hole 41, the folding plate 37.37 is connected to the needle drop path NR.
can be penetrated to the inside.

Next, the flap cloth F is placed on the receiving plates 35, 35 so that the edge to be sewn is located on the folded part of the cloth, and the foot pedal is depressed to the third stage to air the flap cloth F. Cylinder 39.39 operates and flap presser 40.40
is rotated to the position shown by the solid line in FIG.

Reference numeral 21 denotes a fabric edge detection device provided on the front surface of the sewing machine arm, and is provided at a distance from the needle N.

This cloth edge detection device 21 normally emits light, and the folding plate 37.3 located between the flap cloth F and the cloth end detector 21 emits light.
When the edge of the flap cloth F passes directly under the edge detection device 44 due to reception or blocking of light from the reflecting section 7, a signal is input to a microcomputer (not shown), and from the time of inputting this signal, the fabric conveying device 32 moves by a certain distance, the hand N is actuated.

Reference numeral 45 denotes a known corner knife mechanism that includes a fixed corner knife 46 and a movable corner knife 47. After the center knife 22 forms the industrial hole, the movable corner knife 47 moves the same length as the industrial hole, and the fixed corner knife 46 moves up to form the industrial hole. A wedge-shaped notch is inserted at both ends.

As shown in FIG. 7, when the cloth conveying device 32 is activated after one flap cloth F is set on the body cloth M1, the cloth conveying device 32 moves from the right to the left holding the needle N in FIG. Move to.

Then, since the industrial and commercial folding device 23 is fixed at the position shown by the solid line in FIG. As the moving needle N approaches, the width of the industrial and commercial board 27 of the industrial and commercial folding device 23 gradually increases along the sewing direction, that is, the transport direction of the industrial and commercial. As it moves, it will be pulled, so it will disappear by the time Kosho K is sutured with the needle.

When the industrial and commercial K moves further, the rising part of the industrial and commercial guide pieces 31 and 31 enters between the industrial and commercial guide pieces 31 and 31, and regardless of the thickness of the industrial and commercial, the spring 32 always causes the industrial and commercial rising part to stand up almost perpendicularly to the industrial and commercial leg 36 side. and is pressed.

Then, along with this movement, the body fabric M1 flap cloth F moves, and when the cloth edge of the flap cloth F comes directly under the cloth edge detection device 21, the cloth edge detection device 21, which until now has been in a light receiving state due to the reflection of the reflector, changes to a light-shielded state and inputs a signal to the microcomputer.

Then, when the end of the flap cloth F comes directly under the needle N, the needle N is driven and sewing starts from the end of the flap cloth F.

At this time, the folding plate 37.37 has needle drop holes 41.41.
Since it is perforated, the folding plate 37.37 can be used even during suturing.
The tip of the sewing machine penetrates into the needle drop path and presses the area around the sewing machine, so the sewing area will not vibrate due to vibrations of the sewing machine or flap during sewing.

Also, the flap presser foot 40.40 also has a needle drop hole 42.4.
2 is perforated, so the flap presser foot 40 can be used even during suturing.
．． The tip of 40 enters the needle drop path and the flap cloth F
Since the area around the stitching is pressed, the stitched area on the flap cloth will not be shaken due to vibrations of the sewing machine, etc.

In this way, M and F are sewn together, and the central knife 22, which operates a little later than the start of sewing with needle N, gradually cuts open the central part of the flap cloth F, and the rear end of the flap cloth F is separated from the cloth. When the fabric edge detection device 21 comes directly below the edge detection device 21, the reflective portion brings the fabric edge detection device 21 into a light-receiving state, and the center knife 22 and the needle N stop driving.

Finally, the movable corner knife 47 and the fixed corner knife 46, which have moved by the length cut by the center knife 22, move upward to make wedge-shaped cuts at both ends of the part cut by the center knife 22. It forms a notch to form an industrial and commercial hole.

As described above, according to this invention, the width of the industrial and commercial board of the industrial and commercial folding device is formed so that it gradually becomes wider along the sewing direction, so that the industrial and commercial board is gradually pulled in the width direction while being transferred. , Since it will be sewn in this state, it can be sewn while removing the wrinkles that occur in the industry.
You can stitch beautiful industrial and commercial products.

As described above, according to this invention, the width of the industrial and commercial board of the industrial and commercial folding device is formed so that it gradually becomes wider along the sewing direction, so that the industrial and commercial board is gradually pulled in the width direction while being transferred. , Since it will be sewn in this state, it can be sewn while removing the wrinkles that occur in the industry.
You can stitch beautiful industrial and commercial products.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional example, Fig. 2 is a side view of a welt sewing machine equipped with the device of this invention, Fig. 3 is a partial cross-sectional top view of the industrial and commercial board, and Fig. 4 is the front of the industrial and commercial folding device. FIG. 5 is a perspective view of another embodiment of FIG. 4, FIG. 6 is a top view of the cloth conveying device, and FIG. 7 is a sectional view of the cloth conveying device. 11... Bet surface, 23... Industrial and commercial folding device, 26... Industrial and commercial foot, 27...
Industrial and commercial board, 28... Industrial and commercial guide arm, 29.
... Rotating shaft, S ... Elastic body (spring), 31 ... Industry and commerce guide piece, 32 ...
Fabric conveying device, 35... Receiving plate, 37...
Folding plate, 40...Flap holder, M...
...Body fabric, F...Flap cloth, K...
...Industry and commerce.

Claims (1)

[Scope of Claim for Utility Model Registration] An industrial and commercial folding device comprising an industrial and commercial foot supported movably up and down on the upper surface of the bed, and a flat industrial and commercial board installed horizontally at the bottom of the industrial and commercial foot; While pressing the fabric, a pair of first clamp plates arranged to sandwich the needle, a receiving plate provided at intervals on the first clamp plate, and a flap cloth placed at a predetermined position on the receiving plate are pressed. The flap presser is arranged horizontally and reciprocally between the first clamp plate and the receiving plate, and the industrial and commercial board that is moved downward between the first clamp plates presses the industrial and commercial material onto the body fabric and reversely moves along the circumference of the industrial and commercial foot. It is equipped with a folding plate that is bent into a T-shape, and the needle is inserted between the first position and the second position.
It has a cloth conveying device that can convey flap cloth, body cloth, and industrial and commercial materials along the bed surface across positions, and machine-sewn the body material, flap cloth, and industrial and commercial materials during movement from the first position to the second position. In an automatic welt sewing machine designed to perform
An industrial and commercial folding device for an automatic welt-edge sewing machine, characterized in that the width of a commercial and commercial board of the industrial and commercial folding device is formed so as to become wider sequentially along the sewing direction.