JPH0316877B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention creates a circular seam in textile products such as cloth, non-woven fabric, synthetic resin film, leather, paper, etc. Concerning a method and apparatus for tying single-loop knots, the process is simplified and the apparatus itself is extremely simplified, but often achieves complex purposes and its uses. is extremely wide-ranging. For example, it is ideal for sewing a pair of socks together, or for sewing a label, etc. at the same time.It is ideal for sewing a pair of socks together and sewing a label, etc. at the same time. This completely eliminates the drawbacks such as damage to the hands and fingers of the handler.
Furthermore, it can be used for purposes such as sewing fabrics or basting, and since the binding is a removable single-loop knot, it can be removed immediately after use, without leaving any marks on the product. Also, when laundry is done, a piece of cloth with the customer's name embroidered on it is attached to the laundry, and the device of the present invention can be used to clean the laundry without damaging it. It is very convenient because the marking cloth piece can be attached and the stitching thread can be untied and the cloth piece can be easily removed. It is no exaggeration to say that the other uses are limitless.

(Prior art) There is not much known prior art that is close to the technical content of the present invention. If I were to force myself to do so, I would like to point out that the inventor of the present invention has previously filed Japanese Patent Application No.
28732) to some extent. However, although the prior invention and the present invention have some points in common in their objectives, they are completely different in terms of methods and devices.
This is because the present invention adopts a completely new idea in the formation of the circular seam and the means for tying a single loop in order to widen its range of application.

(Problems to be Solved by the Invention) The present invention is capable of forming one annular seam on textile products such as cloth, non-woven fabric, synthetic resin film, leather, paper, etc. by using only the needle thread of an arbitrary thread or string. , and mechanically and automatically completes the single loop knot by unraveling the thread end of the circular seam.If you simply want to create a circular seam, you can use a conventional sewing machine. Since the thread will come undone if the end of the thread is not taken care of, it cannot be used, for example, to sew together two pairs of socks or gloves. Conventionally, there was no device to close the wires with thread, so metal wires were used, but this would damage the product, so when attaching labels or hang tags to expensive products, it was absolutely necessary to use thread. In that case, there is no other way but to do it manually, which is extremely inefficient and costly. The present invention automatically completes the formation of the seam and the disposal of the tail end of the seam in such sewing and closing, and there have been almost no examples of this in the past.

(Means for Solving the Problems) The present invention describes a method and apparatus for creating a single seam in cloth or the like and tying the end of the seam into a single loop knot, and means for achieving this. First, to explain the basic technology, in Fig. 1, the main shaft 3 equipped with a group of cams each performing a predetermined action is regulated to rotate once per process, and the needle K is moves down and up twice. In conjunction with this movement of the needle, the following movements are performed in sequence. That is, (a) when the needle K descends for the first time, the needle K' pierces the cloth or the like and reaches the bottom of the base (FIG. 4). (b) Next, the end _A2 of the thread extending beyond the stitch K' is grasped with the hook 44 and pulled out to a certain length (Fig. 4). (c) At the same time as _the needle K rises, hook 31
By hooking and pulling (toward the right) at a and rotating the thread twisting rod 31, which is the main body of the hook, by 90 degrees, an upward thread loop _L1 is formed. (d) The cloth, etc. is fed by the forward movement of the cloth table 29 and the cloth presser plate 23. (e) By the second lowering of the needle K, the loop
The needle K penetrates into L ₁ (Figure 6). (f) By moving the corner 52a of the bellows needle structure into the gap P between the thread _A4 coming out of the needle K' and the needle body (Fig. 7) and leaving it (Fig. 8), the loop _L1 and The center portion of the thread _A5 between the hooks 44 is hooked onto the hook 52b and pulled together to form a loop _L2 , which is then drawn into the gap P (FIG. 8). (G) As the needle K rises for the second time, the thread A coming out of the stitch K' is pulled up, so the loop _L2 is tightened on the back side of the fabric, etc.
Thus, one chain stitch is formed in the cloth, and
The end of the thread is tied into a single loop knot.

Finally, the cloth is released by cutting the ends of the thread between the seams on the cloth with scissors or automatically using a thread cutting device.

Next, specific devices and mechanisms for realizing each of the above-mentioned functions will be described. A bevel gear 5 and a group of cams for performing the following actions are attached to the main shaft 3, which is regulated to rotate once per process by a motor M, and the mechanism interlocking with the bevel gear and the cam is as follows.

(i) Needle movement mechanism. The needle K is made to move downward and upward twice during one rotation of the main shaft 3, and includes a crankshaft 2 provided with a bevel gear 4 that meshes with a bevel gear 5 on the main shaft, a disk crank 6 attached to the other end, and a disc crank 6 that is interlocked with the crankshaft 2. It consists of a connecting rod 7, a needle bar 10, a needle K, and a bevel gear 4.
Since the number of teeth is 1/2 that of the bevel gear 5, the needle moves downward and upward twice for each revolution of the main shaft.

(ii) Thread withdrawal mechanism. This is because when the needle K is lowered for the first time, the end A ₁ of the thread coming out from the eye K' of the needle is fixed by the hook 44 formed at the end of the corner 42a of the bending lever ₄₂ . The bending lever 4 is a series of lever mechanisms consisting of a cam 41, a roller 50 that engages with the cam 41, and connecting rods 47 and 45.
2 rotates counterclockwise.

(iii) Mechanism of loop _L1 formation. This is done by hooking the center part of the thread A ₂ pulled out in (ii) above on the hook 31a of the thread twisting rod 31 and pulling it to the right (Figure 5). The loop L ₁ is formed by a cam 40, a roll 38 that engages with the cam 40, a thread twisting rod 31 that interlocks with the roll, and a cylindrical cam 3 that fits around it.
Consisting of 2.

(iv) Cloth feeding mechanism. This is the cloth presser plate 28 and the cloth stand 2.
9, the cloth C placed between the cams 22 and 26 is moved forward by one pitch of the seam, and the cam 22, the roll 26 that engages with the cam 22, the connecting rods 25, 24 that interlock with the rolls, the cloth presser plate 23, the cloth table 29 It consists of

(v) Loop L ₂ insertion mechanism. This is the state in which the needle K has descended (the second time) into the loop _L1 (the sixth time).
In Figure), the corner 54 of the bending lever 52, that is, the hook 52b and the bellows needle structure having the hook 52b and the bellows 54, is moved into and out of the gap P between the thread _A4 extending upward from the eye K' of the needle K and the needle itself. When leaving, hook 5
A thread loop formed by hooking the thread at the tip following loop L ₁ at its center using 2b.
A mechanism for drawing L ₂ into the gap P,
It consists of a cam 66 and a roll 6 that engages with the cam 66.
4, and connecting rods 60, 57,
55, a bending lever 52, and its corner 52a.

In addition, when the needle K rises for the second time, the needle
Tighten the loop L ₂ to the back side of the fabric using the force that pulls the thread connected to K' upward (11th
figure). Moreover, if the end of the thread connecting the cloth C and the needle eye K' is cut with scissors or the like, the specified purpose will be completed (Fig. 10). An example of this thread cutting device is described as an attached mechanism, so I will explain it as follows.
In FIG. 3, when the needle K passes the hook 17a of the thread pulling lever 17 during its second upward movement, the hook 17a rapidly pulls the thread A to the right, and the blade 21 pulls the thread. Cam 1
6, a roll 18 that engages with this, and a thread pulling lever 17 that interlocks with this and has a hook at its end.

(Function) The action of the above-mentioned series of interlocking mechanisms is to create one chain stitch in cloth, etc. using only the upper thread without using the bobbin thread, and also to make it possible to unravel the thread end of this seam on the back side of the cloth. The needle bar is tied into a single loop knot, and the functions of the needle bar, the cam group, and the mechanism interlocked therewith are as described above.

(Embodiment) To explain an embodiment of the present invention with reference to the drawings, in Figs. 1, 2, and 3, 1 is a machine base, 1a is a machine frame, and 2 is a machine installed horizontally above the machine body. A bevel gear 4 attached to the end of the crankshaft meshes with a bevel gear 5 attached to the upper end of a vertical main shaft 3 driven by a motor M via pulleys 67 and 68. Bevel gear 5 and bevel gear 4
The ratio of the number of teeth is 2:1, and therefore, for every rotation of the main shaft 3, the crankshaft 2 rotates twice. 6 is a disc crank attached to the left end of the crankshaft 2, and 7 is a pin 7a on this disc crank.
and a short rod 12 attached to the substantially central position of the needle bar 10 are connected via a pivot pin 14 to provide vertical reciprocating motion to the needle bar 10. 8 is the guide metal of the needle bar 10, 9 is its set screw,
Reference numeral 13 indicates a mounting screw for the short rod 12. 15 is needle K
K' indicates the eye of the needle. Incidentally, the motor M is provided with a regulating device (not shown) so that the main shaft 3 rotates correctly once during one rotation. Four cams (however, one attached cam may be added) are attached to the main shaft 3, and these cams, each mechanism interlocked with the cams, and their purpose and operation will be described below. 22 is a disk cam (Fig. 12-),
28 is a cloth pressing plate, 29 is a cloth table, and the cam 22 has one end formed into a bifurcated part 25a, and a roll 26 is pivotally supported on the cam 22.
7 connecting rods 25 are engaged via the rolls.
A base 24 of a fabric table 29 is attached to the other end of the connecting rod 25, a base 28a of a fabric presser plate 23 is pivotally attached to the base 24 by a shaft pin 28, and a leaf spring S is attached to the upper surface of the base. Then, the presser plate 23 is pressed onto the fabric table 29. Therefore, as the cam 22 rotates, the cloth presser plate 23 and the cloth table 29 are connected to the connecting rod 25.
It is constructed so that it moves forward integrally with the advancement of the robot. Reference numeral 30 denotes a guide for the fabric table, which is formed on the end face of the groove 74 provided in the machine table 1. Reference numerals 23b and 29a are elongated holes made in the center of the presser plate 23 and the fabric table 29, respectively, and are passages for the needle K.

40 is a grooved cam (FIG. 12-), and a cam groove 40a is formed on the lower surface of the cam body, and the roll 38 is engaged with the cam groove. Reference numeral 37 denotes a protruding piece attached downward to the central axis of the roll, and this protruding piece and the rear end of the thread twisting rod 31 are connected by a pin 31b. The thread twisting rod 31 has a hook 31 at its tip.
a (Fig. 5), and the body of the rod fits inside the cylindrical cam 32, 33 is a cam groove, and 34 is a pin protruding from the body of the rod. It is something that engages with. 35 is a spring. cam 4
0 rotates, the thread twisting rod 31 moves backward against the force of the spring 35 (moves to the right in FIG. 1) via the roll 38 that engages in the cam groove 40a and the protruding piece 37 that is integrated with the roll 38, but The thread twisting rod itself rotates through 90 degrees under the action of the cylindrical cam 32, so that the horizontal hook 31a is displaced upward.

41 is a disc cam (Fig. 12-), and its rotation causes the bending lever 42 and the corner 4 integral with it.
Rotate 2a in the direction of the arrow in FIG. Reference numeral 44 denotes a thread gripping hook formed at the tip of the corner 44a of the bending lever, and is preferably made of an elastic material such as rubber. 45 is a connecting rod, 46 is a pivot, 47 is a connecting rod having a bifurcated portion 48 at its end, and the other end is pivotally connected to the connecting rod 45 by a pivot 48a. Reference numeral 50 denotes a roll installed in the bifurcated portion 48 and engaged with the circumferential surface 41a of the cam 41. 49 is bracket 4
A spring interposed between 7a and the bifurcated portion 48 is shown. When the cam 41 rotates, the thread gripping bending lever 4 is moved through the roll 50 and the connecting rods 47 and 45.
2 is configured to rotate in the direction of the arrow in FIG. 4 (counterclockwise).

66 is a disc cam (Fig. 12), and thread loop
For the bending lever 52 forming L ₂ (FIG. 8),
The device first rotates counterclockwise around the fulcrum 53 and then immediately returns to its original position in a reciprocating motion. cormorant. Reference numeral 52a is a corner of the bending lever 52, and 52b is a string hook formed at the tip of the corner, the tip of which is preferably formed into an acute edge. 54 is the hook 52b
The front half of the corner 52a is shaped like a needle. 55 is a connecting rod, the front end of which is a protruding portion 56 provided on the boss portion of the bending lever 52.
The other end is pivotally connected to a connecting rod 57 by a pivot pin 59. 57 is a connecting rod, and 58 is a fulcrum provided in the middle thereof. The connecting rod 57 is a connecting rod 6 having a bifurcated portion 68 at one end.
0 and a pivot pin 61. A roll 64 is attached to the bifurcated portion and engages with the outer circumferential surface 66a of the cam 66. Reference numeral 62 indicates a spring interposed between the bracket 47a and the bifurcated portion 63.
Now, after the corner 52a of the bending lever 52 is rotated counterclockwise by the rotation of the cam 66 via the roll 64 and the connecting rods 60, 57, and 55, it is immediately returned to the original position, and at the end of the operation. It is configured to return to its original position after a small counterclockwise movement.

67 is a pulley on the rotating shaft of motor M, 68
is a pulley attached to the main shaft 3, and B is a belt. 69 is a pedestal on which the bobbin 71 is placed;
2, 72a... are thread guides, and 78 is a thread guide attached to the needle bar. The motor M is equipped with a rotation control device (not shown) and is configured to stop after rotating the main shaft 3 once.

Next, the thread end cutting mechanism, which is an attached mechanism, will be explained. In Fig. 1, 16 is a disc cam (12th
), 17 is a lever that is interlocked with the disc cam 16 via a roll 18, and its tip end is connected to the hook 1.
7a (Fig. 3), and the rear end is bifurcated 17.
A roll 18 formed in b and attached to the bifurcated portion
engages with the outer peripheral surface 16a of the cam 16. 20 is a thread guide plate provided on the lower surface of the lever 17 in contact therewith, 20a is an elongated hole drilled in the center thereof, and a thread cutting blade 21 is attached to the rear of the elongated groove. The cam 16 rotates and the lever 17
moves backward, the hook 17a pulls the thread A, and the blade 21 cuts the thread A at this time.

The device of the present invention has the above-mentioned configuration, and its operation will be explained next. With one rotation of the motor M, the main shaft 3 rotates once via the pulleys 67 and 68. To explain the movement of each mechanism in sequence during this time, first, due to the rotation of the bevel gears 5 and 4, The crankshaft 2 rotates, and the needle bar 10
At the same time, the downward movement of the needle K begins. The needle K pierces the cloth or the like C inserted in advance between the cloth presser plate 23 and the fabric stand 29, and reaches below the fabric stand as shown in FIG. Needle K carries thread A, and its terminal is the stitch
Leave it pulled out from K' (Figure 1).
Subsequently, the cam 41 engages the roll 5.
0 is pushed to the left (Fig. 1), and the bending lever 42 is moved in the direction of the arrow (counterclockwise) via the connecting rod having the bifurcated portion 47 that incorporates the roll 50, and the connecting rod 45 that engages with this. At this time, the hook 44 formed at the end of the corner 42a of the bending lever grips the yarn end _A1 and rotates it to the position shown in FIG. Pull out a certain amount of thread A ₂ from '. It is preferable that the hook 44 is made of cushioning material.

In addition, in FIG. 4, the lowered position of the needle K is a position in front of the right side of the hook 31a of the thread twisting rod 31 and almost touching the rod (FIGS. 1 and 2). As the rotation of the main shaft 3 further progresses, the cam 40 is activated next.
That is, the thread twisting rod 31 is pulled in the direction of the arrow in _FIG . Hook the center part,
At the same time, the rod 31 itself rotated 90 degrees due to the action of the cam groove 33 of the cylindrical cam 32, and the hook 3, which was in a sideways state,
1a is displaced upward. Therefore, twist the thread hooked onto the hook to form a loop _L1 . In this state, the threads on the bottom surface of the fabric stand form a shape resembling the Greek letter α (alpha) in the warp direction. Note that, after the thread twisting lever starts operating, the needle K rises once.

Further, due to the rotation of the main shaft 3, the cam 22 pushes the roll 26 that engages with it, and moves both the presser plate 23 and the fabric table 29 to the left via the connecting rod 24 having the bifurcated portion 25 ( Figure 1, Figure 6),
Therefore, the cloth, etc., C, which is being held down by the cloth presser plate 23 on the cloth table 29, is sent forward. Perform the so-called cloth feeding movement.

Subsequently, the second downward movement of the hand K is carried out,
This time, as shown in FIG. 6, the needle K passes through and descends through the loop _L1 formed by the hook 31a of the thread twisting rod 31, and the eye K' of the needle K occupies a position slightly below the loop _L1 .

Next, the cam 66 is actuated by the roll 64 that engages with it, and the bending lever 52 is rotated in the direction of the arrow in FIG. The tip edge of the corner 52a of the lever and the hook 52 following this
b. A preliminary movement in which the bellows 54 enters the gap P between the thread portion _A4 extending upward from the eye K' of the needle K and the needle itself;
Following this, the corner 52a is immediately retreated to its original position (returning in the opposite direction of the arrow), and at this time the hook 52b is
hooks approximately the center of the lower leg _A5 of the thread forming the letter α and retreats, thus creating a loop.
_L2 is drawn into the gap P (Fig. 8), and at the end of this return movement, the bending rod 52 makes a small counterclockwise rotational movement, releasing the thread loop _L2 hooked on the hook 52b. Perform the following exercises. Note that when the corner portion 52a retreats, the bellows 54 reverses and blocks the hook 52b, so the hooked thread will not be removed.

Next, just before or at the same time that the loop L ₂ is released from the hook 52b, the needle K starts to rise, and the thread passing through the needle K' and coming out to the outside is accompanied by this.
_A2 is pulled upward and the loop _L2 portion is tightened to the back side of cloth C (Fig. 9). Therefore,
As shown in FIG. 11, one annular seam 75 and a single loop knot at the end of the thread are completed on the back side of the cloth. At this time, the main shaft 3 stops. At this final stage, the thread (FIG. 8) continuing from the stitch K' to the surface of the cloth C, etc., is appropriately cut with scissors or the like, or with an automatic cutting device. In this way, the cloth etc. C can be removed from the cloth pressing plate.

Next, the operation of the automatic yarn end cutting device shown as an auxiliary mechanism will be explained. When the needle K rises for the second time, the cam 16 acts to move the roll 18 that engages with it to the right in FIG.
The needle K also moves to the right, but at the same time as the needle K rises above the hook position, it quickly moves to the right and threads the thread to the blade 21.
Cut at.

In this device, by one rotation of the main shaft 3, after the entire operation is completed, the entire device returns to its initial state by the action of the springs 35, 49, 62, etc. Furthermore, since the yarn end of an appropriate length is in a state of being advanced from the eye K' of the needle K, it is possible to immediately proceed to the second operation.

As mentioned above, the present invention opens up a completely new field in sewing and closing by creating one circular stitch and forming the end of the thread into a single loop knot, and it is obvious that it will be used in various fields. It is.

[Brief explanation of the drawing]

Fig. 1 is an explanatory view (side view) showing the entire device of the present invention, Fig. 2 is a front view with the same part cut away, Fig. 3 is an explanatory view showing the fabric table, and Figs. 4 to 9 are each mechanism. Explanatory diagram showing the action of and the condition of the thread, Figure 10, Figure 1
Figure 1 is an explanatory diagram showing the seam front and back sides, respectively.
Figure 12 or five types of cams 22, 40, 4
1, 66, and 16 and an explanatory view showing the roll portions that engage with the shapes. FIG. Code explanation, 1... Machine base; 1a... Machine frame, 2...
Crankshaft, 2a... Bearing, 3... Vertical shaft, 3
a, 3b, 3c...Bearing, 4...Bevel gear,
5...Bevel gear, 6...Disc crank,
7...Connection rod, 7a...Pivot pin, 8...Guide metal, 9...Set screw, 10...Needle bar, 11...
...Metal guide, 12...Short rod, 13...Screw,
14... Pivot pin, 15... Screw, 16... Cam, 16a... Cam path, 17... (Thread pulling)
Lever, 17a...Hook, 18...Roll, 1
9... Axis pin, 20... Thread guide plate, 20
a... Long hole, 21... Blade, 22... Cam, 23...
...Fabric holding plate; 23a...Base, 23b...Elongated hole,
24... Base, 25... Bifurcated connecting rod; 25a...
Bifurcated portion, 26...Roll, 27...Axis pin, 28
...Axis pin, 29...Fabric stand; 29a...Elongated hole,
30...Guide, 31...Thread twisting rod; 31a...
...Hook, 31b...Pin (rear end of thread twisting rod),
32...Cylindrical cam, 22...Cam groove, 34...Pin, 35...Spring, 36...Illustrated bearing, 37...Protruding piece, 38...Roll, 39
...shaft, 40...groove cam; 40a...cam groove, 4
1... Cam; 41a... Cam surface, 42... Bending lever; 42a... Corner, 43... Fulcrum shaft, 44...
Hook, 45... Connecting rod, 46... Axis, 47...
...Connecting rod; 47a... Bracket, 48... Bifurcated portion; 48a... Pivot, 49... Spring, 50
... Roll, 51 ... Pivot, 52 ... Bending lever; 52a ... Corner, 52b ... Hook, 53 ...
...Axis, 54...Bella, 55...Connecting rod, 56...
...Protruding portion; 56a... Pivot pin, 57... Connecting rod, 58... Fixed fulcrum, 59... Pivot pin, 60
... (drive shaft) connecting rod, 61 ... pivot pin, 62
... Spring, 63 ... Bifurcated rod, 64 ... Roll, 65 ... Shaft pin, 66 ... Disc cam; 66a
...Cam surface, 67...Pulley, 68...Pulley, 69...Spindle holder, 70...Mandrel; 71...
Pin winding, 72, 72a... Thread guide; 73... Thread guide, 74... Groove (on the machine stand), 75... Stitch,
L ₁ ... Thread ring, L ₂ ... Thread ring, A ... Thread; A ₁ ... Thread end; A ₂ ... (Thread pulled out from the needle), A ₃ ...
Top thread of the fabric; A ₄ ... Thread of the stitch, A ₅ ... Lower leg of α, B... Belt; C... Cloth; M... Motor; M ₁ ... Cord; K... Needle; K '...the eye of the needle,
L ₁ ... loop; L ₂ ... loop, S ... leaf spring;
P...Gap (between needle and thread).

Claims (1)

[Scope of Claims] 1. A needle K with thread K' threaded through the needle eye K' is lowered through a mechanism linked to a series of cams to pierce the cloth C on a base; Next, under the base, grasp the end of the thread extending from the needle stitch of the lowered needle, pull out a certain amount of thread, raise the needle once, and pull the center part of the thread pulled out to the hook. The thread gripped by the hook is formed into an upward loop _L1 by hooking and drawing and the hook rotates by 90 degrees, and then the cloth, etc. C is advanced by a predetermined length by the cloth feed mechanism, and then the second needle is inserted. said loop by descending
A needle is passed through L ₁ and then another hook hooks and draws the thread between loop L ₁ and the first gripped end of the thread, thus forming a loop L ₂
The thread part that advances from the stitch K' and reaches the cloth C
Each means for pulling the thread A ₄ into the gap P between the needle itself and raising the thread coming out from the needle stitch K' by the second rise of the needle K, and tightening the formed loop L ₂ to the back side of the cloth, etc. A chain seam thread tail is characterized in that by continuously performing the above steps using a driving source such as a motor, one chain seam is automatically formed in cloth, etc., and the thread tail of the seam is tied into a single loop knot. Binding method. 2. Claim 1, which includes means for hooking the thread _A1 connected to the seam of the cloth, etc. from the needle K' with a hook during the second upward movement of the needle, pulling it to the cutter position, and cutting the thread. The chain seam thread tail binding method described. 3 A bevel gear 5 is attached to the main shaft 3 installed at the rear of the aircraft.
and a cam group, and a mechanism that interlocks with the bevel gear and each cam, that is, (i) a crank device provided at the other end of the horizontal shaft to which the bevel gear 4, which meshes with the bevel gear 5 and has 1/2 the number of teeth, is attached. A needle movement mechanism consisting of a needle K attached to the lower end of an interlocking needle bar 10. (ii) A thread pulling mechanism in which the other end of a connecting rod 47, which pivotally supports a roll 50 that engages with a cam 41, is connected to a bending lever 42 supported on a fulcrum shaft 43 via a lever mechanism. (iii) A hook 31a is formed at the tip of the protruding piece 37 protruding from the roller 38 that engages with the grooved cam 40, and the thread twisting rod 31 that is internally engaged with the cylindrical cam 32 can be rotated. Loop L ₁ formation mechanism consisting of connections. (iv) A fabric table is constructed by integrally connecting a bifurcated connecting rod 25 that pivotally supports a roll 26 that engages with a cam 22 and a fabric table 29 that is slidably mounted in a groove provided in the base and has an elongated hole. A cloth feeding mechanism in which the rear end of a cloth presser plate 23 having an elongated hole is pivotally attached to the side frame of the cloth. (v) A bifurcated rod that pivotally supports the roll 64 that engages the cam 66 is engaged with a bent rod 52 that has a hook 52b and a bellow 54 at its tip and is supported by a pivot 53 through a series of lever movement mechanisms. Loop consisting of L ₂
A chain seam thread tail binding device comprising an insertion mechanism. 4 A cam 16 is provided on the main shaft 3 and interlocked with the cam,
In addition, a thread cutting mechanism comprising a series of interlocking mechanisms for driving a lever 17 having a hook 17a at its tip and a cutting blade 21 attached below the hook is attached. Chain stitch thread tail binding device.