JP2003154179A - Sewing machine for cycle sewing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewing machine for cycle sewing which can deal with various sewing conditions and with which work efficiency can be improved. SOLUTION: The sewing machine (1) for cycle sewing decides a timing to start relatively moving a button (B) and a needle (5) on the basis of the vertical position of the needle in a button sewing process for sewing the button on an object to be sewn in a horizontal state and a root winding sewing process for winding a root thread (T) formed between the button and the object to be sewn in the vertical state of the button. Therefore, in the button sewing process and the root winding sewing process, sewing work can be performed correspondingly to the form or kind of a fabric or button and workability or accuracy in sewing work can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cycle stitch sewing machine for performing neck roll sewing.

[0002]

2. Description of the Related Art Generally, as a cycle sewing machine,
A sewing machine with a root-wrapping button (hereinafter, simply "sewing machine") that automatically sewes a button (hereinafter, upper button) on the cloth and further winds a thread around a sewing thread (hereinafter, "root thread") between the upper button and the cloth. Is called). As shown in FIGS. 18 and 19, this sewing machine 200 has a tongue that holds the button sewing position of the cloth C in a bent state as shown in FIG. 19B with respect to the elevating path of the sewing machine needle 201. 202 and a support plate 203 provided so as to face this
And a button holding unit 205 having a button holding member 204 capable of holding the button BU horizontally or vertically, and the drive control of the sewing machine 200 is performed by a control means (not shown). The button holding unit 20
5 is connected to a rotary shaft 206 rotatably provided on the sewing machine main body, and the rotary shaft 206 is connected to the air cylinder 20.
It rotates by moving back and forth. And this rotary shaft 206
The button holding member 204 is rotated by 90 degrees in accordance with the rotation.

When the button BU is sewn to the cloth C, the button BU is first positioned horizontally above the cloth C held by the tongue 202 and the support plate 203 (FIGS. 19A and 19B). )reference). The control means drives the sewing machine motor (not shown) to drop the sewing needle 201 into one of the button sewing holes Ba, and while the sewing needle 201 is positioned above the button sewing hole Ba based on the vertical position of the needle. Then, the tongue 202, the support plate 203, and the button holding member 204 are horizontally moved by a predetermined distance.

Next, the control means causes the sewing needle 201 to drop into another button sewing hole Ba, so that the sewing needle 201 is pressed into the button sewing hole B.
The tongue 1, the support plate 2, and the button holding member 3 are moved again while being positioned above a. By repeating such control, as shown in FIG. 20 (a), the sewing needle 201 performs so-called rake sewing in which the space between the material C and the button B is provided, and the button sewing process is completed. Next, the control means
As shown in FIG. 19C, the button holding member 204 is driven to put the button BU in the vertical state. Then, based on the vertical position of the needle, the tongue 202, the support plate 203, and the button holding member 204 are integrally moved in the horizontal direction at a predetermined timing, and as shown in FIG. The root winding sewing process is completed by alternately dropping both sides of the root thread T formed between the cloth C and the root thread and performing root winding sewing on the root thread.

[0005]

As described above, the sewing machine 2
The control means for controlling the drive of 00 performs various operations such as button sewing and neck wrapping by relatively moving the sewing needle 201 and the button BU based on the vertical position of the needle. In recent years, there has been a demand for a sewing machine that can meet the demands for work diversification, speeding up, workability improvement, and the like.

An object of the present invention is to provide a cycle stitch sewing machine which can cope with various sewing conditions and can improve work efficiency.

[0007]

In order to solve the above problems, a cycle sewing machine (1) according to claim 1 has a button sewing process in which the button (B) is in a horizontal state and is sewn to a sewing product, and a button. The sewing machine is a cycle sewing machine which performs a root winding sewing step of winding a root thread (T) formed between a button and a sewing material in a vertical state, and is judged based on a vertical position of a needle (5). The start time of relative movement of the button and the needle is changed in the button sewing process and the necklace sewing process.

According to the cycle sewing machine of the first aspect, the start timing of the relative movement of the button and the needle is appropriately changed between the button sewing process and the necklace sewing process. Therefore, regarding the button sewing process and the necklace sewing process, , It becomes possible to perform sewing work according to the shape, type, etc. of cloth and buttons,
In addition, workability and accuracy of sewing work can be improved.

A cycle stitch sewing machine according to a second aspect of the present invention is the cycle stitch sewing machine according to the first aspect, wherein the end time of relative movement between the button and the needle determined based on the vertical position of the needle is sewn by the button sewing machine. It is characterized in that it is changed in the process and the necklace sewing process.

According to the cycle sewing machine of the second aspect, the same effect as that of the first aspect can be obtained, and the end time of the relative movement of the button and the needle is appropriately changed between the button sewing process and the necklace sewing process. Therefore, in the button sewing process and the necklace sewing process, it is possible to perform the sewing work according to the shape, type, etc. of the fabric and the button, and the workability and accuracy of the sewing work can be improved.

According to another aspect of the cycle sewing machine of the present invention, a button sewing process is performed in which the button is sewn to the sewing product while the button is in a horizontal state, and a root thread formed between the button and the sewing product is wound around the button when the button is in a vertical state. A cycle sewing machine that performs a necklace sewing process, wherein the start time of the relative movement of the button and the needle determined based on the vertical position of the needle is set from the time when the needle tip comes out of the button hole in the button sewing process. It is characterized in that it is after, and in the step of sewing the necklace, it is before the time when the needle tip comes out of the root thread.

According to the cycle sewing machine of the third aspect, in the button sewing process, the start time is after the time when the needle tip comes out of the button hole. Therefore, for example, before the needle completely comes out of the button hole, the button is pressed. It is possible to prevent problems such as damage to the needles and buttons that occur when the movement of the needle is started. In the root-wrapping process, the start time is before the time when the needle tip comes out of the root thread.Therefore, compared to the case where the start time is set after the time when the needle tip comes out of the root thread, the button movement timing It is possible to improve the workability of the neck wrapping sewing process. Specifically, since the button and the sewn product can be quickly moved to a predetermined position, it is possible to increase the vertical movement speed of the needle and improve the work speed of the necklace sewing work. Further, when the vertical movement speed of the needle is not changed, the movement speed when the button or the sewn product is moved to a predetermined position can be suppressed, the positioning accuracy can be improved, and the noise generated during the movement can be suppressed.

According to another aspect of the cycle sewing machine of the present invention, the button sewing step is performed in which the button is horizontal and the button is sewn to the sewn product, and the root thread formed between the button and the sewn product is wrapped around the button when the button is in the vertical state. A cycle sewing machine that performs a necklace sewing process, wherein the end time of relative movement between the button and the needle determined based on the vertical position of the needle is changed between the button sewing process and the necklace sewing process. Is characterized by.

According to the cycle sewing machine of the fourth aspect, the end timing of the relative movement of the button and the needle is appropriately changed between the button sewing process and the necklace sewing process. , It becomes possible to perform sewing work according to the shape, type, etc. of cloth and buttons,
In addition, workability and accuracy of sewing work can be improved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a schematic configuration of a neck-wrap button sewing machine 1 (hereinafter, simply referred to as “sewing machine”) as a cycle sewing machine of the present invention. Although not shown, the sewing machine 1 includes a bed portion, a vertical body portion standing upright from the bed portion, an arm portion extending from the vertical body portion so as to face the bed portion, and the like.

As shown in FIG. 2, the sewing machine 1 is fixed to the tip of a needle bar 9 provided at the tip of an arm, and a sewing needle (needle) 5 through which a thread is threaded and a sewing needle 5 in the bed portion. The button is automatically sewn to the cloth (sewn material) in cooperation with a looper (not shown) that is provided so as to be opposed to. The formation of stitches such as the operation of the looper is a well-known technique, and thus detailed description thereof will be omitted. Sewing machine 1
Various buttons can be sewn by independently transporting the upper buttons and cloth. Various mechanisms for transporting buttons and the like will be described in detail below. In the following description, a so-called front button is described as an upper button B, and a button such as a force button that is attached to the back side of the fabric with respect to the front button is described as a lower button.

2 to 4 are views showing a needle up-and-down moving mechanism 10 and a needle swinging mechanism 11 provided on the sewing machine 1. The needle up-and-down moving mechanism 10 drives the sewing needle 5 up and down, and has a spindle motor (sewing machine motor) 14 fixed inside the sewing machine 1.
Is the driving source. The output shaft of the main shaft motor 14 is connected to a main shaft 7 that is horizontally provided while being rotatably supported by a bearing 7a. Further, a counterweight 18 is attached to the tip of the main shaft 7.
The balance link 16 and the balance 2 are provided adjacent to the counterweight 18.
5 are provided. One end of the balance link 16 and the balance 2
Each of the bases 5 is rotatably supported by the counterweight 18, and moves up and down along a predetermined locus as the counterweight 18 rotates. The other end of the balance link 16 is rotatably attached to one end of a needle bar crank 19 fixed to an eccentric position of the counterweight 18, and the other end of the needle bar crank 19 has a needle bar crank rod 26. The upper end is rotatably attached. Needle bar crank rod 26
A shaft hole 26a is formed at the lower end of the. A guide member 29 having a guide groove 29a formed in the vertical direction is provided behind the needle bar crank rod 26.
A square piece 27 is slidably fitted in 9a. Square piece 2
7 has a shaft hole 27a formed in the horizontal direction.

On the other hand, an upper and lower rod 28 is provided in front of the needle bar crank rod 26. The upper and lower rods 28 are formed with two shaft holes arranged vertically, and an upper shaft hole (not shown) rotatably supports a shaft fixed to a needle bar holder 8 that supports and supports the needle bar 9. It is passed. A shaft (not shown) is passed through the shaft hole 28a below the upper and lower rods 28, the shaft hole 26a of the needle bar crank rod 26, and the shaft hole 27a of the square piece 27. Two
The vertical movement of 6 is transmitted to the square piece 27 and the vertical rod 28.
In FIG. 4, for convenience of explanation, the shaft holes 27a, 26a,
Although it is shown in a state where it is vertically shifted so that 28a can be seen, it is actually arranged in a straight line in the horizontal direction. In the needle up-and-down moving mechanism 10 having the above configuration, when the main shaft 7 is rotated by the rotation of the main shaft motor 14, the counterweight 18 is rotated, and one end of the needle bar crank 19 is rotated about the main shaft 7 to thereby rotate the needle bar. The crank rod 26 moves up and down. This vertical movement is transmitted to the needle bar 9 via the vertical rod 28 and the needle bar holder 8 so that the sewing needle 5 moves vertically.

The needle swinging mechanism 11 reciprocally swings the sewing needle 5 left and right (X direction), and uses a needle swinging motor 20 which is a pulse motor as a drive source. The needle swing motor 20 is fixed to the machine frame of the sewing machine 1 and rotates in synchronization with the spindle motor 14. The first link 24 is connected to the output shaft,
Link 24 has second link 23, second link 23 has third link 23
The links 22 are connected in order. In the third link 22,
A rear end portion of the needle bar swing rod 12 which is long in the front-rear direction is fixedly connected. A swing arm 13 having a substantially L shape is fixed to the front end of the needle bar swing rod 12, and a swing angle piece 15 is attached to the tip of the swing arm 13. On the other hand, the needle bar 9 has an intermediate portion and an upper portion,
The needle bar swing base 6 is supported so as to be vertically slidable. The needle bar swing base 6 is configured to be swingable in the X direction about a fulcrum pin 17. A groove 6a is formed in the vertical direction at the lower end of the needle bar rocking base 6, and a rocking angle piece 15 is slidably fitted in the groove 6a in the vertical direction.

In the needle swinging mechanism 11 having the above structure, when the needle swinging motor 20 is operated, its rotation is transmitted to the needle bar swing rod 12 via the first link 24, the second link 23 and the third link 22. , Swing back and forth. This swing is transmitted to the needle bar swing base 6 via the swing angle piece 15, and the needle bar swing base 6
Oscillates in the X direction with the needle bar 9 around the fulcrum pin 17, whereby the sewing needle 5 is swung left and right. By the way, the upper and lower rods 28 are rotatable with respect to the shafts passed through the upper and lower shaft holes, and can rotate in accordance with the swing of the needle bar 9 within the vertical plane about the shaft hole 28a. Therefore, the needle bar 9 can be rocked in the X direction by the needle bar rocking base 6 together with the needle bar bracket 8 while being vertically driven by the needle bar bracket 8. Further, the needle swing motor 20 operates in synchronization with the spindle motor 14 as described above, but specifically, the needle swinging motor 20 operates only when the sewing needle 5 is positioned above the needle plate (not shown) on the upper surface of the bed portion. The rod 9 is controlled to swing.

5 and 6, the upper Y feed mechanism 3 for conveying the upper button B held by the chuck 90 in the Y direction.
A button differential mechanism 70 for carrying in the 0 and X directions is shown. The upper Y feed mechanism 30 uses an upper Y feed motor 32 fixed inside the central portion of the arm portion as a drive source. The upper Y feed motor 32 is configured to be rotatable both forward and backward, and has a pinion 32a fixed to its output shaft.

An upper Y feed base 36 is provided at the central portion of the arm portion so as to project to a so-called pocket portion.
On the upper surface 36b of the upper Y feed base 36, base guide portions 36a, 36a that engage with the arm guide portions 31, 31 fixed to the arm portion are provided. Arm guides 31, 31 and base guides 36a, 36a
Are engaged with each other so as to be linearly slidable in the Y direction. At the edge of the upper Y feed base 36, a rack support 36c for supporting the rack 33 is provided on the upper surface, and the pinion 32a is engaged with the rack 33. Therefore, when the upper Y feed motor 32 rotates in one direction and the pinion 32a rotates, the upper Y feed motor 32 rotates through the rack 33.
The feed base 36 is configured to move in either the front or rear direction.

A position sensor 42, which is a photo interrupter, is provided inside the arm and near the rack support 36c. On the other hand, a plate 33a to be sensed is fixed to the side surface of the rack 33. When the rack 33 moves forward by a predetermined distance, the plate 33a to be sensed passes between the position sensors 42, which are photointerrupters, whereby it is detected that the rack 33 has reached the forward limit position, and if the rack 33 further advances. It abuts against a stopper (not shown) so that it cannot move further forward.

The upper Y feed base 36 is provided with a button vertical movement mechanism 40 for vertically moving a chuck unit 71 which will be described later. The button up-and-down moving mechanism 40 is mounted inside the upper Y feed base 36, and is capable of rotating in both forward and reverse directions, a vertical pinion 35a fixed to the output shaft of the vertical drive motor 35, and an upper Y feed base. The upper and lower racks 41 are attached to the side surfaces of the side wall 36 in the vertical direction. The upper and lower racks 41 have a rack support plate 41a for the chuck support arms 34 that support the chuck unit 71.
Is fixed through. Therefore, the vertical drive motor 35
When the upper and lower pinions 35a rotate in one direction and the upper and lower pinions 35a rotate, the upper and lower racks 41 move up and down, whereby the chuck support arms 34 move up and down via the rack support plates 41a. The upper and lower pinions 35a
A vertical guide bar 43 for guiding the vertical movement of the rack support plate 41a is provided close to the.

A button rotating mechanism (rotating means) 46 for rotating the chuck unit 71 by 90 degrees is provided near the button up / down moving mechanism 40, and a rotary cylinder 37 provided on the upper side surface of the chuck supporting arm 34 is used as a driving source. I am trying.
This rotary cylinder 37 has two air ports 37a, 37a.
The output rod 37b can be reciprocally driven back and forth in a double-acting air cylinder equipped with. A triangular link 38 formed in a substantially triangular shape is provided at the tip of the output rod 37b.
Is connected rotatably. Triangular link 38
One end of an elongated main link 39 provided along the chuck support arm 34 is connected to the second apex of the. The third apex of the triangular link 38 is connected to the chuck support arm 34. The other end of the main link 39 is connected to a rotating body 45 provided between the other end of the main link 39 and the lower end of the chuck support arm 34, as shown in FIG. A unit shaft 81 extending from the unit support arm 81 that supports the entire chuck unit 71 is attached to the rotating body 45.
a is fixed. A shaft hole (not shown) is formed in the lower end of the chuck support arm 34, and the unit shaft 81a penetrates the shaft hole in a rotatable manner.

In the button rotating mechanism 46, the triangular link 38, the main link 39, the rotating body 45, and the chuck supporting arm 3 are provided.
4 configures a four-bar link having the chuck support arm 34 as a fixed link. Then, as the output rod 37b moves back and forth, the rotating body 45 rotates 90 degrees in either the clockwise or counterclockwise direction, whereby the unit shaft 81a.
The chuck unit 71 rotates through 90 degrees. Specifically, when the output rod 37b is pushed out, the chuck unit 71 holds the upper button B in a horizontal state (states of FIGS. 5 and 6), and when the output rod 37b is retracted, the chuck unit 71 is pulled up. It is rotated clockwise at 6 and the upper button B is grasped so as to be in a vertical state. The necklace sewing described below is performed in this state.

Next, the chuck unit 71 will be described with reference to FIGS. FIG. 9 shows the motor unit 7.
It is shown with 7 removed. Chuck unit 71
Is composed of a chuck portion 90 for chucking the upper button B and a button differential mechanism 70 for driving the chuck portion 90 in the X direction. The chuck portion 90 includes chuck pieces 91a and 91b which are provided so as to face each other on the left and right, and the upper button B is sandwiched and held between them. The chuck piece 91a is a chuck mounting portion 9 provided below the chuck movable member 92 formed in an L shape.
It is fixed to 2a. On the other hand, the chuck piece 91b is fixed to a chuck mounting portion 93a provided below the chuck movable member 93 which is formed in an L shape shorter than the chuck movable member 92.

The chuck movable members 92 and 93 are
As shown in FIGS. 7 and 8, chuck pieces 91b are provided, respectively.
And guide grooves 74a and 74b formed on the lower surface of a base 74 provided between the support arm 81 and the support arm 81 so as to be slidable. A manual lever 82 (shown by a broken line in FIG. 8) for manual operation is attached to the lower surface of the base 74 by a screw 83 so as to be rotatable around the screw 83. Pins 92b and 93b projecting downward are fixed to the lower surfaces of the chuck movable members 92 and 93, and these penetrate through holes (not shown) formed in the manual lever 82 and having a predetermined shape. Therefore, when the manual lever 82 rotates clockwise around the screw 83 in FIG. 8, the chuck movable member 92 is pushed leftward via the pin 92b,
The chuck movable member 93 is pulled to the right through the pin 93b, whereby the gap between the chuck pieces 91a and 91b is widened, and the upper button B can be removed. Further, when the manual lever 82 rotates about the screw 83 in the counterclockwise direction in FIG. 8, the chuck movable member 92 is pulled to the right through the pin 92b, and the chuck movable member 93 moves to the pin 93.
It is pushed to the left via b, which causes both chuck pieces 91
The distance between a and 91b becomes close, and the upper button B can be gripped.
In addition, at the front edge of the base 74, a screw 74c is used for the manual lever 8
Two stopper plates 79 are fixed. The long hole 79a is a long hole for adjusting the distance between the chuck pieces 91a and 91b.

The button differential mechanism 70 drives the chuck portion 90 left and right, and mainly comprises the unit support arm 81.
It is composed of a differential base 80 fixed to the, a differential motor 72 and a stopper member 78. The differential base 80 has
As shown in FIG. 9, a long hole 80a that is long in the left and right is formed in the center, and two of the long holes 80a are finer holes 80b and 80b. Pores 80b, 80
The b has a predetermined width and a predetermined length, and step screws 75, 75 fixed to the base 74 are fitted therein. By moving the stepped screws 75, 75 along the fine holes 80b, 80b, the base 74 can reciprocate in the left-right direction with respect to the differential base 80.

A motor unit 77 having a substantially U-shaped cross section is screwed onto the differential base 80, and left and right wall portions 77a, 77 constituting the motor unit 77.
A differential motor 72, which is a linear motor, is fixedly supported between b. The output shaft 72a of the differential motor 72 has a wall 77.
It penetrates through a and 77b and projects to the left and right sides. When the differential motor 72 operates, the output shaft 72a moves straight in either the left or right direction. On the other hand, a stopper member 78 is erected on the upper surface of the left side of the base 74 by screwing. Between the stopper member 78 and the wall portion 77a, springs 73, 73 for urging the two in the direction of approaching each other are provided.
Have been passed over. The stopper members 78 are always in contact with the output shaft 72a by the springs 73, 73.

In the button differential mechanism 70 having the above structure, when the differential motor 72 operates in one direction, the output shaft 72a moves straight to the left. The straight movement of the output shaft 72a pushes the stopper member 78 to the left, and the base 74 that fixedly supports the stopper member 78 slides to the left with respect to the differential base 80. Since the chuck movable members 92 and 93 are engaged with the base 74, the chuck portion 90 moves leftward together with the base 74. On the contrary, when the output shaft 72a moves to the right due to the operation of the differential motor 72 in the opposite direction, the stopper member 78 also moves to the right due to the urging force of the springs 73, 73. 90 also moves to the right.

Next, with reference to FIGS. 10 to 12, a description will be given of the lower Y feed mechanism 50 which is provided in the bed portion and conveys the cloth and the lower button in the Y direction. Lower Y feed mechanism 50
Has a lower Y feed motor 51 as a drive source, and a sprocket wheel 52 is fixed to an output shaft of the motor 51.
Further, a timing belt 53 stretched in the front-rear direction is hung on the sprocket wheel 52 so as to engage with each other. Further, the timing belt 53 is also wound around a rotatable driven roller 58, and the lower Y feed motor 5
When 1 rotates, it rotates through the sprocket wheel 52. In the vicinity of the timing belt 53, a lower shaft 69 that drives a looper (not shown).
Is provided. The rotation of the main shaft motor 14 is transmitted to the lower shaft 69 via the timing belts 68a, 68b, etc., and the looper operates in synchronization with the main shaft 7.

As shown in FIG. 12, the timing belt 53 is fixed to the Y feed base 5 via fixing plates 63a and 63a.
4, 54 are screwed. The guide shafts 55a and 55b are fixed to a frame (not shown) in the bed so as to be parallel to the timing belt 53. The guide shaft 55a is the Y feed base 5
The guide shaft 55b passes through the base portions 54a and 54a of the Y-feed bases 54 and 54,
4b, and the Y feed bases 54, 54 are supported by these guide shafts 55a, 55b. Screw holes 54c and 54c are formed on the upper surfaces of the tip portions 54b and 54b. The lower plate 5 is inserted into these screw holes 54c, 54c.
As shown in FIG. 10, the lower plate 56 is fixed to the Y feed base 54 by aligning the screw holes (not shown) formed in 6 and fixing with the set screws 56c and 56c. Therefore, the lower Y feed motor 51 operates and the timing belt 53 moves the Y feed base 54, so that the lower plate 56 also moves in the Y direction.

The lower plate 56 has a cloth and a lower button placed on the upper surface thereof, and the lower plate 56 of the present invention has three button attaching positions A, B, so as to correspond to a plurality of kinds of button attaching sewing. Has C. Position A is a place where sewing is performed by scooping, neck wrapping, or both. The lower plate 56 has a large L-shaped opening 56a. On the other hand, at the forefront part of the lower plate 56, there is provided a cloth holding part 60 which is made up of two spring holding parts 60a, 60a arranged side by side and holds the cloth with the tongue 57. Each spring holding part 60a is composed of thin leaf springs facing each other in the vertical direction. A needle hole 60b is provided at the rear edge of the cloth holding portion 60 so as to face the opening 56a.

The tongue 57 for setting the cloth on the cloth holding portion 60 will be described. A cylinder base 65 that supports a tongue cylinder 66 that drives a tongue 57 is fixed to the lower portion of the Y feed bases 54, 54. The output rod 66 a of the tongue cylinder 66 is connected to the tongue link 67. On the other hand, the tongue 57 is screwed to the tip of a tongue support portion 59 formed in an arc shape. The base end of the tongue support 59 and the tongue link 6
The tongue shaft 59a is inserted through the tongue 7, and the tongue link 67 and the tongue support portion 59 are rotatable together with the tongue shaft 59a. Also, the cylinder base 6
A lower plate vertical movement cylinder 100 (see FIG. 11) is arranged at the lower part of 5. Although detailed description will be given later, the movable portion 100a of the lower plate vertical movement cylinder 100 is in contact with the lower surface of the cylinder base 65, and the cylinder base 65 and the Y feed base 54 are moved by raising the movable portion 100a.
The lower plate 56 can be raised via the. 10 and 12, the illustration of the lower plate vertical movement cylinder 100 is omitted.

The operator sets the cloth so as to wrap the tip portion of the tongue 57 and, in this state, manually pushes and moves the hand pushing portion 57a of the tongue 57 so as to approach the lower plate 56.
A tongue sensor (not shown) is provided near the lower plate 56, and outputs a tongue detection signal to the CPU 102 when the tongue 57 approaches. In response to this, the CPU 102
Under the control of, the tongue cylinder 66 is turned on, the output rod 66a is retracted, and the tongue 57 is advanced to the cloth holding portion 60, and finally the left and right spring holding portions are held with the cloth folded. It is designed to be sandwiched between 60a and 60a. At this time, the needle hole 57b formed at the tip of the tongue 57 is substantially aligned with the needle hole 60b when viewed from above and below. With respect to the cloth thus set, the upper button B chucked on the chuck part 90 has a needle hole 6 as shown by a dotted line in FIG.
0b is set above the lower plate 56 so that 0b is located substantially in the center thereof. By setting the cloth and the upper button B in this way, rake sewing (button sewing) as shown in FIG. 17 is performed.
Is possible.

In the case of performing neck-tie sewing after button sewing, the upper button B is rotated 90 degrees clockwise in FIG. 10 by the rotary cylinder 37 as described above. By rotating the upper button B in this manner, the upper button B falls into the opening 56a in a vertical state, and the root thread T between the upper button B and the cloth is oriented in the front-rear direction, and the root-wrap sewing is enabled. Although detailed description will be given later, the upper button B has the opening 56a.
In the state in which the upper button B has fallen inside, the upper button B interferes with the driving of various devices such as a looper arranged below the opening 56a, and therefore the button vertical movement mechanism 40 and the lower plate vertical movement cylinder 100 are driven. Then, the necklace sewing is performed with the upper button B being moved upward. The tongue cylinder 66 is automatically turned off when the sewing is completed, and the tongue 57 returns to the original standby position.

Behind the opening 56a are positions B and C.
The needle plate 61 constituting the above is fixed at its base. A recess 61a is formed in the front edge of the needle plate 61, and a needle hole 61b is formed in the center. In the lower plate 56, elongated holes 56b to be needle holes are formed at locations corresponding to the recesses 61a and the needle holes 61b. The concave portion 61a is at the position B, the lower button is set between the concave portion 61a and the lower plate 56, the cloth is placed on the lower button, and the upper button B gripped by the chuck portion 90 is set thereon. , Lower button sewing can be performed. Further, the needle hole 61b is at the position C, the cloth is placed on the needle hole 61b, and the upper button B gripped by the chuck portion 90 is set above the needle hole 61b, and the button is attached by sticky sewing without the lower button. It can be performed. In addition, position B,
In the case of sewing at C, the cloth is pressed by a cloth presser (not shown), and the cloth presser is driven by a cloth pressing cylinder 107 (see FIG. 1). Thus, the lower plate 56 has three types of button sewing positions, and the lower Y feed mechanism 50 drives the lower plate 56 so that each of the positions A, B, and C is located below the sewing needle 5. To be done. A reference position (origin) and an initial position are set for each of the positions A, B, and C.

Next, the control circuit of the sewing machine 1 will be described with reference to FIG. The sewing machine 1 is provided with an electrical equipment box 101 including a CPU (Central Processing Unit) 102 which is the control means of the present invention.
Each part is connected to 01. For example, electrical box 1
An operation panel 103, an operation pedal 104, and the like are connected to 01. On the operation panel 103, the operator selects the type of button attachment from rake sewing without root wrapping, rake root wrapping sewing, bottom button sewing, sticky sewing, etc., and inputs the sewing conditions for the selected button sewing. Or displays the set sewing conditions and sewing conditions.

The CPU 102 is provided with a ROM and a RAM as the memory 102a, and various programs are stored in the memory 102a. In particular, the memory 102a
Stores a program for cycle stitching in which different types of buttons are continuously attached, and by calling the program, the lower plate 56 is driven by the lower Y feed mechanism 50 while the position A, which is below the sewing needle 5, is stored. B and C are moved.

Further, an encoder 14a for detecting the rotation angle of the spindle motor 14 is connected to the electrical equipment box 101, and the motor drive circuits 14b, 20a, 32a, 3 are provided.
Spindle motor 14, needle swing motor 2 via 5a and 72a
0, the upper Y feed motor 32, the vertical drive motor 35, the differential motor 72, and the lower Y feed motor 51 are connected. Further, a solenoid valve 108 is connected to the electrical equipment box 101,
The rotary cylinder 37, the tongue cylinder 66, and the cloth pressing cylinder 107 are connected via the electromagnetic valve 108.
Further, the sewing machine 1 is provided with a thread cutting mechanism (not shown) so that the thread is cut at a predetermined timing during or after sewing, and a thread cutting motor or a thread cutting cylinder is provided as a drive source thereof. ing.

With regard to the upper button B, the sewing machine 1 having the above-described structure has the button differential mechanism 70 and the upper Y feed mechanism 30.
Thus, it can be moved in the X and Y directions.
Further, the lower button and the cloth can be moved in the Y direction by the lower Y feeding mechanism 50. In addition, by using the needle swinging mechanism 11 movable in the X direction, the lower button and the fabric can be moved in the X direction relative to the upper button B. Furthermore, regarding the upper button B,
The button up-and-down moving mechanism 40 can move up and down, and the rotating cylinder 37 can change the direction by 90 degrees.

Next, the operation of sewing the button to the cloth will be described with reference to FIGS. 13 to 16. As shown in FIG. 13A, first, in step S1, button sewing (button attaching sewing process) is performed. When button sewing is performed, the upper button B is held horizontally by the chuck unit 71 as described above, and the lower Y feed mechanism 50 is held.
It is set to the position corresponding to position A of. For button sewing, first return each drive unit of the sewing machine to the origin,
Various data (sewing data) required for button sewing processing is input. As the sewing data, for example, the start timing of relative movement between the upper button B and the needle, which will be described later, the sewing speed,
It is the length of the root thread T, the diameter of the upper button B hole, the center distance of the button hole, and the like.

Then, as shown in FIG. 13B, in step S10, the spindle motor 14 (sewing machine motor)
To drive the needle bar. In step S11, the sewing machine motor 14 output from the encoder 14a
The vertical position of the needle 5 is detected by detecting the rotation angle of
It is in a standby state until the start time of relative movement between the upper button B and the needle 5. Here, the start time of the relative movement of the upper button B and the needle 5 refers to the time of starting the relative movement of the upper button B with respect to the needle 5, and in the present embodiment, once falls into the button hole. It is set at the time when the needle 5 comes out of this button hole. That is, as shown in FIG. 14 (A), the rotation angle of the sewing machine motor 14 (hereinafter, simply referred to as “rotation angle”) when the needle 5 is located at the top dead center is set to 0 degree, and as shown in FIG. As shown in the drawing, the rotation angle of -85 degrees (275 degrees) at which the needle 5 dropped in the button hole of the upper button B in the horizontal state comes out from the upper surface of the upper button B is set as the start time.

Further, in the present embodiment, the needle 5 is set at the end of the relative movement between the upper button B and the needle 5, that is, the time when the relative movement of the upper button B with respect to the needle 5 is finished. The rotation angle is set to 85 degrees when it falls to That is, the relative movement of the upper button B with respect to the needle 5 is not performed during the rotation angle of 85 degrees to 275 degrees where the needle 5 is located in the button hole. Then, if YES in step S11, that is, if the rotation angle becomes −85 degrees, the process proceeds to step S12.

In steps S12 to S14, the upper button B is moved by a predetermined distance relative to the needle 5, and the needle swing mechanism 11 is driven to swing the needle 5 if necessary. Here, the substantially trapezoidal graph shown in FIG. 14C shows the movement of the lower plate 56 executed between the rotation angle of −85 degrees and the rotation angle of 85 degrees when the needle 5 is located outside the button hole. It is a graph used for speed control. The vertical axis of the graph represents the speed of the lower plate 56, and the horizontal axis represents time. The lower plate 56 starts moving in a predetermined direction when the rotation angle reaches -85 degrees. In step S13, the speed of the lower plate 56 is detected. In step S14, the speed of the lower plate 56 is controlled according to the graph, and then the lower plate 56 is stopped when the rotation angle reaches 85 degrees. In step S15, the number of stitches is measured, and when the predetermined number of stitches is executed, step S15
The process moves to 16 to end the vertical movement of the needle 5. This completes a series of button sewing steps, and the process proceeds to step S2.

In step S2, the chuck unit 71 is rotated 90 degrees by the button rotation mechanism 46 to bring the upper button B into the vertical state. Here, as described above, the chuck unit 71 is fixed to the rotating body 45 of the button rotating mechanism 46, and the rotating body 45 is connected to the other end of the main link 39. Then, the chuck unit 71 rotates about the connecting portion of the rotating body 45 and the main link 39 as the center of rotation.
Rotate once. Therefore, by rotating the upper button B held by the chuck unit 71 from the horizontal state by 90 degrees, the upper button B falls below the opening 56a of the lower plate 56. Here, since various devices such as a looper (not shown) are disposed below the opening 56a, when the upper button B is rotated by 90 degrees, the upper button B is driven when the various devices are driven. Interfere with each other, so in step S3, the button up / down moving mechanism 40 and the lower plate up / down moving cylinder 100 are driven to move the upper button B upward.

Then, in step S4, neck wrapping sewing is executed. As shown in FIG. 13C, first, in step S40, the sewing machine motor 14 is driven to move the needle 5
Start moving up and down. Then, in step S41, a standby state is set until the start time of relative movement between the upper button B and the needle 5 while detecting the rotation angle. As shown in FIGS. 15 (A) and 15 (B), the start time of the root winding sewing process is a rotation angle at which the needle 5 comes out upward from the root thread T extending horizontally from the center point of the upper button B. It is set to 70 degrees, and the end time is the needle 5 descending from top dead center.
Is set to a rotation angle of 70 degrees, which is the time when the yarn reaches the root thread T. Then, in the range of the rotation angle of 70 degrees to 290 degrees (-70 degrees) where the needle 5 is located below the root thread T, the upper button B does not move relative to the needle 5 and the needle 5 moves to the root thread T. The upper button B is relatively moved with respect to the needle 5 between the rotation angle −70 degrees and the rotation angle 70 degrees, which is positioned higher. The figure shown by the dotted line in FIG. 15B shows the position of the upper button B in the horizontal state in the button sewing process.

Then, if YES in step S41, that is, if the rotation angle is -70 degrees, the process proceeds to step S42.
In steps S42 to S44, the upper button B is moved relative to the needle 5 by a predetermined distance, and the needle swing mechanism 11 is driven to swing the needle 5 as necessary. Here, the substantially trapezoidal graph shown in FIG. 15C is a graph used for speed control of the movement of the lower plate 56 executed between the rotation angle of −70 degrees and 70 degrees. The vertical axis of the graph shows the speed of the lower plate, the horizontal axis shows the time, and the rotation angle is -70.
The lower plate 56 starts to move in a predetermined direction from the point of time. In step S43, the moving speed of the lower plate 56 is detected, and in step S44, the speed of the lower plate 56 is controlled according to the graph, and then the lower plate 56 is stopped when the rotation angle reaches 70 degrees. In step S45, the number of stitches is measured, and when the predetermined number of stitches is executed, step S46 is performed.
And the vertical movement of the needle 5 is completed. This completes a series of necklace sewing steps, and the sewing work of the upper button B on the fabric is completed.

The start time of the root winding sewing process may be set before the needle tip comes out of the root thread T of the upper button B, that is, when the needle tip is located below the root thread T. For example, 16 (A) and 16 (B) show that the start timing is the rotation angle 2
The figure shows the case where it is set to 00 degrees (-160 degrees). The end time is set to a rotation angle of 70 degrees, which is the time when the needle descending from the top dead center reaches the root thread T. In this way, by setting the start time in the neck wrapping sewing process to 200 degrees before the needle tip comes out of the root thread T of the upper button B, the speed control of the movement of the lower plate 56 shown in FIG. 16C is performed. As can be seen from the graph used, the start time is 290
The movement timing of the lower plate 56 can be advanced by an amount of time required for the sewing machine motor 14 to rotate from 200 degrees to 290 degrees, as compared with the case of setting the degree (-70 degrees). The workability of the process can be improved. In this case, the lower plate 56 (cloth) moves before the needle tip comes out of the root thread T, but the upper button B
The root yarn T laid between the cloth and the cloth has elasticity and flexibility to some extent and absorbs the impact due to the movement of the needle, so that the root yarn T and the needle 5 are not damaged.

According to the sewing machine 1 shown in this embodiment,
Since the start time and the end time of the relative movement between the upper button B and the needle 5 are appropriately changed between the button sewing process and the necklace sewing process, the shapes of the fabric and the upper button B, regarding the button sewing process and the necklace sewing process, It becomes possible to perform the sewing work according to the type and the like, and the workability and accuracy of the sewing work can be improved. Also, in the button sewing process, the start time is the time when the needle tip comes out of the button hole.
It is possible to prevent problems such as damage to the needle 5 and the upper button B that occur when the movement of the upper button B is started before the needle 5 is completely pulled out from the button hole.

In the neck-wrapping process, the needle tip is the root thread T.
Since the start time is the time before exiting from the upper thread, the moving timing of the upper button B can be made earlier than in the case where the start time is set to the time at which the needle tip exits from the root thread T, and the root winding sewing process It is possible to improve the workability of. Specifically, since the lower plate 56 can be quickly moved to a predetermined position, it is possible to increase the vertical movement speed of the needle 5 and improve the work speed of the necklace sewing operation. When the vertical movement speed of the needle 5 is not changed, the movement speed when the lower plate 56 is moved to a predetermined position can be suppressed, the positioning accuracy of the lower plate 56 can be improved, and the noise generated during the movement can be suppressed. You can

The present invention is not limited to the above embodiment, and it is needless to say that the specific shape, structure and the like can be appropriately changed. For example, the start timing and the end timing of the relative movement between the upper button B and the needle 5 can be changed appropriately. That is, in the button sewing process, it suffices to start after the needle tip comes out of the button hole of the upper button B and finish before the needle tip enters the button hole. It suffices to start before the tip comes out of the root thread and finish before the needle tip enters the root thread. Further, in the present invention, the needle 5 and the upper button B
The change of the relative position with respect to the swinging of the needle 5 in the X direction by the needle swing motor 20, the up button B by the up Y feed motor 32.
In the Y direction, the differential motor 72 moves the upper button B in the X direction, and the lower Y feed motor 51 moves in the Y direction. However, the needle 5 is fixed at a fixed position. , Only the upper button B may be moved in the XY direction so that the upper button B moves relative to the needle 5.
That is, it suffices if the relative positional relationship between the needle 5 and the upper button B can be changed.

In the present invention, the vertical position of the needle 5 is detected by detecting the rotation angle of the sewing machine motor 14 with the encoder 14a. However, an encoder is attached to the main shaft 7 to rotate the main shaft 7. May be detected by detecting. Further, only the end timing of the relative movement between the upper button B and the needle 5 may be changed in the button sewing process and the necklace sewing process. Further, as the sewing machine 1, an upper button B such as the button rotation mechanism 46 is
Any known sewing machine with a neck wrapping button provided with a mechanism for rotating it may be used. In addition, the sewing machine 1 shown in the present embodiment
The specific structures of the upper Y feed mechanism 30, the button differential mechanism 70, the lower Y feed mechanism 50, and the like included in the above are not limited to the above-described embodiments. For example, although the lower Y feed mechanism 50 uses a belt drive, it may be configured by a gear mechanism such as a rack and a pinion. On the contrary, the upper Y feed mechanism 30 and the button differential mechanism 70 may be configured to be driven by a belt, or may have a gear structure different from that of the above embodiment.

[0055]

According to the cycle stitch sewing machine of the first aspect, the start timing of relative movement of the button and the needle is appropriately changed between the button sewing process and the necklace sewing process. Therefore, the button sewing process and the necklace sewing are performed. With regard to the process, it is possible to perform sewing work according to the shape, type, etc. of cloth and buttons,
In addition, workability and accuracy of sewing work can be improved.

According to the cycle sewing machine of the second aspect, the same effect as that of the first aspect can be obtained, and the end timing of the relative movement of the button and the needle is appropriately changed between the button sewing process and the necklace sewing process. Therefore, in the button sewing process and the necklace sewing process, it is possible to perform the sewing work according to the shape, type, etc. of the fabric and the button, and the workability and accuracy of the sewing work can be improved.

According to the cycle sewing machine of the third aspect, in the button sewing process, the start time is after the time when the needle tip comes out of the button hole, so that, for example, before the needle completely comes out of the button hole, the button is sewn. It is possible to prevent problems such as damage to the needles and buttons that occur when the movement of the needle is started. In the root-wrapping process, the start time is before the time when the needle tip comes out of the root thread.Therefore, compared to the case where the start time is set after the time when the needle tip comes out of the root thread, the button movement timing It is possible to improve the workability of the neck wrapping sewing process. Specifically, since the button and the sewn product can be quickly moved to a predetermined position, it is possible to increase the vertical movement speed of the needle and improve the work speed of the necklace sewing work. Further, when the vertical movement speed of the needle is not changed, the movement speed when the button or the sewn product is moved to a predetermined position can be suppressed, the positioning accuracy can be improved, and the noise generated during the movement can be suppressed.

According to the cycle sewing machine of the fourth aspect, the end timing of the relative movement of the button and the needle is appropriately changed between the button sewing process and the necklace sewing process. , It becomes possible to perform sewing work according to the shape, type, etc. of cloth and buttons,
In addition, workability and accuracy of sewing work can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a cycle stitch sewing machine of the present invention.

FIG. 2 is a perspective view showing a needle up-and-down moving mechanism and a needle swinging mechanism.

3 is a perspective view showing respective drive motors of the needle up-and-down moving mechanism and the needle swinging mechanism of FIG. 2. FIG.

FIG. 4 is a perspective view showing essential parts of a needle up-and-down moving mechanism and a needle swinging mechanism of FIG.

FIG. 5 is a perspective view mainly showing an upper Y feed mechanism and a chuck unit.

FIG. 6 is a perspective view mainly showing an upper Y feed mechanism and a chuck unit.

FIG. 7 is a perspective view showing a chuck unit.

FIG. 8 is a perspective view showing a bottom surface side of a chuck unit.

FIG. 9 is a perspective view showing the chuck unit with the motor unit removed.

FIG. 10 is a perspective view showing a lower plate and a lower Y feed mechanism.

FIG. 11 is a perspective view showing a lower Y feed mechanism with a lower plate removed.

FIG. 12 is a perspective view showing a bottom surface side of a lower Y feed mechanism.

FIG. 13 is a flowchart (A) to (C) showing a sewing operation of buttons on a cloth.

FIG. 14 is drawings (A) to (C) showing a control method in a button sewing process.

FIG. 15 is drawings (A) to (C) showing a control method in a neck wrapping sewing process.

FIG. 16 is drawings (A) to (C) showing a control method in a neck wrapping sewing process.

FIG. 17 is a drawing showing rake stitching.

FIG. 18 is a perspective view of essential parts of a general sewing machine with a neck roll button.

FIG. 19 is a diagram showing a button sewing method using a general neck-wrap button sewing machine, and is a plan view (a), a side view (a) showing a state at the time of button sewing (root thread sewing); b) is a plan view (c) showing a state at the time of sewing a necklace.

FIG. 20 is a view showing a button sewn state by a general neck wrap button sewing machine, and is a side view showing a state at the time of button sewing (a) and a side view showing a state at the time of sewing a neck wrap (b). Is.

[Explanation of symbols]

B button T root thread 1 sewing machine (cycle sewing machine) 5 needles 14 Sewing machine motor (spindle motor)

Continued front page    F term (reference) 3B150 AA16 AA23 BB02 CC07 CE01                       CE23 CE27 CE28 GD14 GF02                       GF03 JA03 JA07 JA28 JA31                       LA01 LA05 LA07 LA29 LA90                       LB01 LB02 MA02 MA08 NA05                       NA28 NA77 NB02 NB09 NC03                       NC06 QA04 QA06 QA07

Claims (4)

[Claims] 1. A cycle for performing a button sewing process in which a button is sewn on a sewn product in a horizontal state, and a root-wrapping sewing process in which a button is held in a vertical state to wrap a root thread formed between the button and the sewn product. A cycle sewing machine, characterized in that the start timing of relative movement of the button and the needle determined based on the vertical position of the needle is changed in the button sewing process and the necklace sewing process. 2. The cycle sewing machine according to claim 1, wherein the end time of the relative movement of the button and the needle determined based on the vertical position of the needle is determined by the button sewing process and the necklace sewing process. A cycle sewing machine characterized by being changed. 3. A cycle of performing a button sewing process in which a button is sewn on a sewn product in a horizontal state, and a root-wrapping sewing process in which a button is in a vertical state and a root thread formed between the button and the sewn product is wrapped around the sewn product. In the sewing machine, the start time of relative movement between the button and the needle, which is determined based on the vertical position of the needle, is after the time when the needle tip comes out of the button hole in the button sewing process, and the neck-wrapping process Then, the cycle sewing machine is characterized in that it is before the time when the needle tip comes out of the root thread. 4. A cycle in which a button sewing step of sewing a sewing material with the button in a horizontal state and a root winding sewing step of winding a root thread formed between the button and the sewing material with the button in a vertical state are performed. What is claimed is: 1. A sewing machine, wherein the end time of relative movement between the button and the needle determined based on the vertical position of the needle is changed in the button sewing process and the necklace sewing process.