JP2005130888A - Automatic sewing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic sewing apparatus which can continuously perform a plurality of sewing processes with a good working efficiency. <P>SOLUTION: An automatic holing apparatus M which is this automatic sewing apparatus is constituted in such a manner that the arrangement of a cloth pressor section (11) which is vertically movably provided on the upper surface side of a cloth holding plate (10) can be switched between three positions of a retracted position that the cloth pressor section is retracted above the cloth holding plate, a cloth pressing position that the cloth pressor section supports a cloth on the upper surface of the cloth holding plate, and an intermediate position between the retracted position and the cloth pressing position, by a cloth pressor section moving actuator (14). Then, for this automatic sewing apparatus, a movement controlling means (control section 100) moves the cloth pressor section to the cloth pressing position when a sewing means forms specified stitches on the cloth which is mounted on the upper surface of the cloth holding plate. And when a cloth moving means moves the cloth mounted on the upper surface of the cloth holding plate in a predetermined direction, the cloth pressor section actuator is controlled in such a manner that the cloth pressor section may be moved to the intermediate position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an automatic sewing apparatus, and more particularly to an automatic sewing apparatus that continuously performs a plurality of buttonhole stitching and button-attached sewing.

2. Description of the Related Art Conventionally, there has been known an automatic sewing apparatus that includes a cloth transfer device for transferring a cloth and continuously performs a plurality of buttonhole stitches on the front of a body cloth. This automatic sewing device automatically performs a plurality of buttonhole stitches so that when a buttonhole sewing is performed at a predetermined position, the cloth transfer device transfers a predetermined amount of the fabric and performs buttonhole sewing at the next position. (For example, refer to Patent Document 1).
Also, in the conventional sewing machine and sewing device, the cloth holding part that holds down the fabric during sewing has a cloth holding position that holds the cloth against the work table and supports it, and the cloth can be easily set on the work table of the sewing machine or sewing device. The two-stage position (height) of the retreat position for retreating above is switched by the air cylinder.
Japanese Patent Application Laid-Open No. 7-1000027

However, since the automatic sewing device described in Patent Document 1 performs buttonhole sewing and performs buttonhole sewing at the next position, the cloth presser is moved each time a predetermined amount of fabric is transferred. If the part moves from the cloth pressing position to the retracted position, the work efficiency may deteriorate.
In other words, since the cloth holding part moves more than the cloth can move between the work table and the cloth holding part, the movement distance of the cloth holding part is large, and the cycle time of the cloth pressing operation is large. There was a problem that loss would occur.

  The subject of this invention is providing the automatic sewing apparatus which can perform a some sewing continuously with work efficiency.

  In order to solve the above problems, the invention described in claim 1 is an automatic sewing apparatus (for example, an automatic sewing apparatus M) for forming a plurality of predetermined stitches continuously on a cloth, on which the cloth is placed. A cloth holding plate (10), sewing means for forming a predetermined seam on the cloth placed on the upper surface of the cloth holding plate (for example, the sewing machine body 1), and a cloth placed on the upper surface of the cloth holding plate. A cloth transfer means (for example, a cloth transfer device 20) for transferring in a predetermined direction, a cloth pressing part (11) provided on the upper surface side of the cloth holding plate so as to be movable up and down, and the cloth pressing part above the cloth holding plate. The fabric retainer that moves the fabric retainer to the retracted position, the fabric retainer position where the fabric retainer presses and supports the cloth on the upper surface of the cloth holding plate, and the intermediate position between the retracted position and the fabric retainer position. Part moving means (for example, cloth presser part actuator 14) and sewing When forming a predetermined seam on the cloth placed on the upper surface of the cloth holding plate, the cloth holding portion is moved to the cloth holding position, and the cloth transferring means is placed on the upper surface of the cloth holding plate. It is characterized by comprising a movement control means (for example, control unit 100) for controlling the cloth pressing portion moving means to move the cloth pressing portion to an intermediate position when transferring the cloth in a predetermined direction.

According to the first aspect of the present invention, the cloth presser portion provided to be movable up and down on the upper surface side of the cloth holding plate of the automatic sewing apparatus is retracted above the cloth holding plate by the cloth presser moving means. The retraction position to be moved, the cloth pressing position where the cloth pressing portion presses and supports the cloth on the upper surface of the cloth holding plate, and the intermediate position between the retracting position and the cloth pressing position are moved to the three positions. Can be switched.
The movement control means of the automatic sewing apparatus moves the cloth pressing portion to the cloth pressing position when the sewing means forms a predetermined seam on the cloth placed on the upper surface of the cloth holding plate, and transfers the cloth. When the means moves the cloth placed on the upper surface of the cloth holding plate in a predetermined direction, the cloth pressing portion moving means is controlled so as to move the cloth pressing portion to the intermediate position.

That is, in the automatic sewing apparatus, while the sewing means is sewing a predetermined seam at a predetermined sewing location in the cloth, the cloth pressing portion moves to the cloth pressing position and holds the cloth on the upper surface of the cloth holding plate to support it. When the cloth transferring means transfers the cloth from a predetermined sewing place to the next sewing place in order to change the sewing place, the cloth holding portion moves to an intermediate position lower than the retracted position to release the cloth support. The cloth can be transferred.
Thus, when the cloth is transferred, the cloth pressing portion is not moved to the retracted position as in the prior art, but is moved to the intermediate position, so that the movement distance of the cloth pressing portion can be further reduced. Wasteful movement related to the cloth pressing operation of the pressing portion can be reduced. And the loss of the cycle time at the time of transferring the cloth from a predetermined sewing location to the next sewing location can be reduced. Thereby, the work time in forming a plurality of seams at predetermined intervals on the cloth can be shortened.
In addition, when the cloth is first placed on the cloth holding plate, the cloth pressing portion is in the retracted position, so that even if the cloth is slightly slack, the cloth is not caught on the cloth pressing portion. Further, when the cloth is taken out from the cloth holding plate at the end, since the cloth pressing portion is in the retracted position, the cloth is not caught by the cloth pressing portion.
Therefore, it can be said that the automatic sewing apparatus according to the present invention is an automatic sewing apparatus that can continuously perform a plurality of sewing operations efficiently.

  According to a second aspect of the present invention, in the automatic sewing apparatus according to the first aspect, the cloth transfer control means for starting the transfer of the cloth by the cloth transfer means while moving the cloth pressing portion from the cloth pressing position to the intermediate position. For example, the control unit 100) is provided.

According to the second aspect of the invention, the same function as the first aspect of the invention can be achieved, and the cloth transfer control means of the automatic sewing apparatus can be configured such that the cloth pressing portion moving means moves the cloth pressing portion from the cloth pressing position. When moving upward toward the intermediate position, the cloth transfer means is controlled so that the cloth transfer means starts transferring the cloth.
That is, when the cloth holding unit moves the cloth in a predetermined direction by a predetermined amount while the cloth holding part moving means reciprocates the cloth holding part from the cloth holding position to the intermediate position, During the upward movement from the pressing position, the cloth transferring means starts transferring the cloth, so that the cloth pressing operation of the cloth pressing portion and the cloth transferring action of the cloth transferring means are synchronized. It is possible to reduce the cycle time loss when transferring the cloth from a predetermined sewing location to the next sewing location.
Thereby, the working time in forming a plurality of seams at predetermined intervals on the cloth can be further shortened.

  According to a third aspect of the present invention, in the automatic sewing apparatus according to the first or second aspect, the setting means for arbitrarily setting the height of the cloth pressing portion from the cloth holding plate in at least one of the retracted position and the intermediate position. It is characterized by providing.

  According to the invention described in claim 3, the same effect as that of the invention described in claim 1 or 2 is achieved, and in the automatic sewing device, the cloth holding plate of the cloth pressing portion at at least one of the retracted position and the intermediate position is used. Is provided with setting means for arbitrarily setting the heights, so that the heights at those positions can be arbitrarily input and set. Therefore, the heights of these positions can be changed so that the user can easily operate and use them.

According to the first aspect of the present invention, the automatic sewing apparatus is configured such that the cloth pressing portion moves to the cloth pressing position and the cloth is moved to the cloth holding plate while the sewing means is sewing the predetermined seam to the predetermined sewing portion of the cloth. When the cloth transfer means transfers the cloth from a predetermined sewing location to the next sewing location in order to change the sewing location, the fabric pressing portion moves to an intermediate position lower than the retracted position. Thus, the support of the cloth can be released, and the cloth can be transferred.
Thus, when the cloth is transferred, the cloth pressing portion is not moved to the retracted position as in the prior art, but is moved to the intermediate position, so that the movement distance of the cloth pressing portion can be further reduced. Wasteful movement related to the cloth pressing operation of the pressing portion can be reduced. And the loss of the cycle time at the time of transferring the cloth from a predetermined sewing location to the next sewing location can be reduced. Thereby, the work time in forming a plurality of seams at predetermined intervals on the cloth can be shortened.
Therefore, it can be said that the automatic sewing apparatus according to the present invention is an automatic sewing apparatus that can continuously perform a plurality of sewing operations efficiently.

According to the second aspect of the present invention, the automatic sewing apparatus is configured such that the cloth feeding means moves the cloth in a predetermined direction while the cloth pressing section moving means reciprocates the cloth pressing section from the cloth pressing position to the intermediate position. When the cloth holding part is moved upward from the cloth holding position, the cloth holding means starts to transfer the cloth while the cloth holding part moves upward from the cloth holding position. Therefore, the loss of cycle time when transferring the cloth from a predetermined sewing location to the next sewing location can be reduced.
Thereby, the working time in forming a plurality of seams at predetermined intervals on the cloth can be further shortened.

  According to the invention of claim 3, the automatic sewing apparatus includes setting means for arbitrarily setting the height of the cloth pressing portion from at least one of the retracted position and the intermediate position from the cloth holding plate. The height at the position can be arbitrarily input and set. Therefore, the heights of these positions can be changed so that the user can easily operate and use them.

An embodiment of the present invention will be described with reference to FIGS.
In this embodiment, an automatic sewing device called an indexer will be described as an example of an automatic sewing device. This automatic sewing machine makes a cut hole with a knife in the cloth to be sewn, and forms a button hole in a shirt etc. on the cloth by making a hole seam around the cut hole. It is an automatic sewing apparatus that can form a plurality of hole seams at predetermined intervals by transferring a predetermined amount by the transfer means and repeating sewing.
Here, the direction in which the sewing needle 8 described later moves up and down is defined as the Y-axis direction (vertical direction), and the direction in which the cloth transfer device 2 described later conveys the cloth so as to be orthogonal thereto is the X-axis direction (left-right direction). The direction orthogonal to both the Y-axis direction and the X-axis direction is defined as the Z-axis direction (front-rear direction).

  As shown in FIG. 1, the automatic hole sewing device M transfers a sewing machine body 1 as a sewing means provided on the upper surface of the sewing machine table T, and a cloth that is a sewing object placed on the sewing machine table T. Operations such as a cloth transfer device 20 as a cloth transfer means, a cloth guide device 30 for guiding the cloth transferred by the cloth transfer device 20 along the X-axis direction, and input of various setting data necessary for sewing by an operator An operation panel 40 as setting means for performing the above-described operation, and a control unit 100 that performs operation control of each of the above-described configurations.

  As shown in FIGS. 1 and 2, the sewing machine body 1 includes a sewing machine frame 2 whose outer shape is substantially U-shaped in a side view. The sewing machine frame 2 includes a sewing machine arm portion 2a that extends above and below the sewing machine body 1, a sewing machine bed portion 2b that extends below the sewing machine body 1 and extends in the front-rear direction, a sewing machine arm portion 2a, and a sewing machine bed portion 2b. And a vertical body portion 2c for connecting the two.

The sewing machine body 1 includes a power transmission mechanism disposed in a sewing machine frame 2 and has an upper shaft (not shown) and a lower shaft (not shown) that are rotatable and extend in the front-rear direction. The upper shaft (not shown) is arranged inside the sewing machine arm 2a, and the lower shaft (not shown) is arranged inside the sewing machine bed 2b.
The upper shaft (not shown) is connected to a sewing machine motor 5 (see FIG. 5), and rotational power is applied by the sewing machine motor 5. Further, the lower shaft (not shown) is connected to the upper shaft through a vertical axis (not shown), and when the upper shaft rotates, the power of the upper shaft moves to the lower shaft side through the vertical axis (not shown). The lower shaft rotates.
A sewing needle bar (not shown) that moves up and down by the rotation of the upper shaft is connected to the front end of the upper shaft (not shown), and at the lower end of the sewing needle bar, as shown in FIG. A sewing needle 8 is provided. A hook (not shown) is provided at the front end of the lower shaft (not shown). When the lower shaft rotates together with the upper shaft, a seam is formed by the cooperation of the sewing needle 8 and the hook (not shown).
The connection structure of the upper shaft (not shown), the sewing machine motor 5, the sewing needle bar (not shown), the sewing needle 8, the lower shaft (not shown), the shuttle (not shown), and the sewing operation thereof are conventionally known. Since it is the same, it does not elaborate here.

Further, as shown in FIG. 2, a cloth holding plate 10 is disposed on the sewing machine bed portion 2 b, and a cloth pressing portion 11 and a knife 12 are disposed above the cloth holding plate 10.
The cloth presser 11 is attached to a mounting plate 13 disposed at the front end of the sewing machine arm 2a, and a cloth presser actuator 14 (see FIG. 5) as a cloth presser moving means is attached to the mounting plate 13. is set up. Then, as shown in FIG. 3, when the cloth pressing portion actuator 14 is in the first ON state, the cloth pressing portion 11 moves to the cloth pressing position, and when the cloth pressing portion actuator 14 is in the second ON state, the cloth pressing portion is moved. The part 11 moves to the intermediate position. When the cloth presser actuator 14 is turned off, the cloth presser 11 is moved to the retracted position.
The cloth pressing portion actuator 14 is an actuator capable of controlling the position of the cloth pressing portion 11, and for example, a pulse motor or a servo motor can be applied.

Here, the retracted position of the cloth presser 11 is an arrangement in which the cloth presser 11 is located farthest from the cloth holding plate 10 in the operation range. In this arrangement, the cloth holding plate 10 and the cloth presser 11 are located. The cloth is placed between the parts 11 or taken out.
The cloth pressing position of the cloth pressing portion 11 is an arrangement for sewing so that the cloth pressing portion 11 supports the cloth on the cloth holding plate 10 and prevents the cloth from shifting.
Further, the intermediate position of the cloth presser 11 is an arrangement between the retracted position and the cloth presser position, and the cloth is moved so that the cloth transfer device 20 (to be described later) can move the cloth. The presser 11 is arranged to be lifted to release the support of the cloth on the cloth holding plate 10.

  The knife 12 is attached to a mounting plate (not shown) disposed at the front end of the sewing machine arm 2a, and a female actuator 15 (see FIG. 5) is installed on the mounting plate. When the knife actuator 15 is turned on, the knife 12 is lowered, and when the knife actuator 15 is turned off, the knife 12 is raised. The female actuator 15 is switched between the ON state and the OFF state based on a predetermined program for operating the automatic boring sewing machine M (sewing machine body 1).

As shown in FIGS. 1 and 4, the cloth transfer device 20 includes a first cloth transfer unit 20 a and a second cloth transfer unit 20 b disposed on the upper surface of the sewing machine table T with the sewing machine body 1 interposed therebetween. A support unit 21 that supports the cloth transport units 20a and 20b, a cloth feed pulse motor 26 that is disposed in the sewing machine table T and moves the support unit 21 in the left-right direction, and the like are provided.
As shown in FIG. 4, the cloth conveyance unit 20 a includes a clamp member 25 that holds the cloth against the upper surface of the sewing machine table T, and a cylinder (not shown) that moves the clamp member 25 up and down.
Further, the support portion 21 that supports the cloth conveyance portion 20a extends to the lower side (inside the sewing machine table T) from both ends of the horizontal support member 22 provided in parallel to the sewing machine table T and the horizontal support member 22. The vertical support members 23 and 23 are provided, and the rack member 24 is stretched over the lower ends of the vertical support members 23 and 23.
The cloth feed pulse motor 26 includes a pinion member 27 that engages with the rack member 24 of the support portion 21 on its motor shaft.

In such a cloth transfer device 20, the rack member 24 of the support portion 21 is disposed so as to mesh with the pinion member 27 rotated by the cloth feed pulse motor 26. Accordingly, when the pinion member 27 rotates, the cloth conveying unit 20a moves in the cloth feeding direction (X-axis direction) together with the rack member 24. And the clamp member 25 of the cloth conveyance part 20a conveys the cloth pressed down on the upper surface of the sewing machine table T in the cloth feed direction. Then, the cloth placed on the upper surface of the sewing machine table T is set in a predetermined amount (in the cloth feeding direction) based on the set interval for forming the perforated seam and the distance for the cloth transferring device 20 to transfer the cloth according to the interval. It is designed to be transported at a predetermined distance.
In addition, the 2nd cloth conveyance part 20b is the structure similar to the 1st cloth conveyance part 20a. The first and second cloth conveying units 20 a and 20 b are operated in synchronization with each pulse motor 26.

As shown in FIG. 1, the cloth guide device 30 includes a first guide portion 30a and a second guide portion 30b disposed on the upper surface of the sewing machine table T with the sewing machine body 1 interposed therebetween, and each guide portion 30a, Guide moving portions 31a and 31b for moving 30b are provided.
Each guide part 30a, 30b is arranged on the upper surface of the sewing machine table T along the cloth feeding direction (X-axis direction), and the guide moving parts 31a, 31b respectively orthogonally cross the cloth feeding direction ( It is possible to move in the front-rear direction and the Z-axis direction).
The first guide portion 30a is fixed to the rack member 32a of the guide moving portion 31a, and the rack member 32a is rotated by a pulse motor 33 (see FIG. 5) disposed in the guide moving portion 31a. Are arranged so as to mesh with each other. When the pinion member rotates with the operation of the pulse motor 33, the rack member 32a moves back and forth (Z-axis direction), and the guide portion 30a moves back and forth and in the Z-axis direction. And the position where each guide part 30a, 30b is arrange | positioned according to the cloth etc. which the cloth transfer apparatus 20 transfers and conveys the upper surface of the sewing machine table T is changeable.
In addition, the 2nd guide part 30b is the structure similar to the 1st guide part 30a. The first and second guide portions 30 a and 30 b are moved synchronously by driving the pulse motor 33.

The operation panel 40 is, for example, a touch panel type operation unit having a display unit for displaying a plurality of operation keys, various setting data, and the like, for an operator to perform operations such as starting and stopping a sewing machine (sewing apparatus). The operator functions as setting means for inputting various setting data of a sewing machine (sewing apparatus) necessary for sewing.
The main parameters and data set by the operation panel 40 include, for example, the height from the cloth holding plate 10 on which the cloth presser 11 is disposed, the interval for forming the hole seam, and the cloth transfer according to the interval. The distance at which the apparatus 20 transports the cloth, the number of hole stitches to be formed, the positions at which the guide portions 30a and 30b of the cloth guide device 30 are arranged according to the cloth and the hole stitches, the cloth cutting length, the knife width, There are clamp length, clamp width, sewing pitch, clamp pitch, clearance length between cloth cutting hole and bar clamp, knife left / right position, number of stitches, thread tension, sewing speed, etc. Setting input is possible through the panel 40.

In the operation panel 40, for example, when a sewing machine start switch is pressed, a drive signal for operating the sewing machine (sewing apparatus) input by operation is output to the control unit 100 (CPU 101) described later.
Various data set and input on the operation panel 40 are output to the control unit 100 described later and stored in the EEPROM 104 described later. For example, a cloth presser part position adjustment key (not shown) on the operation panel 40 is pressed to display a display screen for adjusting the cloth presser part position on the display part of the operation panel 40 and the cloth presser part 11 at the retracted position or the intermediate position. The height from the cloth holding plate 10 can be adjusted with the increase / decrease key, and the setting can be input. For example, the height is set to 14 mm at the retracted position and the height at the intermediate position is set to 6 mm. These data are stored in the EEPROM 104 described later.

Further, as shown in FIG. 5, the automatic sewing machine M (sewing machine body 1) includes a sewing machine motor 5, a cloth presser actuator 14, a female actuator 15, a pulse motor 26 of the cloth transfer device 20, and a cloth guide device 30. The control unit 100 is connected to the pulse motor 33, the operation panel 40, and the like.
The control unit 100 includes a CPU 101, a ROM 102, a RAM 103, an EEPROM 104, and an I / O interface 105. A ROM 102, a RAM 103, an EEPROM 104, and an I / O interface 105 are connected to the CPU 101 via a bus.

  The CPU 101 performs centralized control of the operation of each part in accordance with various control programs for the boring automatic sewing device stored in the ROM 102 in accordance with drive signals input from the operation panel 40, various settings, data, etc. The result is stored in the work area in the RAM 103 and the processing result stored in the RAM 103 is stored in the EEPROM 104. And CPU101 controls the drive of each part which comprises the boring automatic sewing apparatus M (sewing machine main body 1).

In the ROM 102, control programs and control data of the automatic boring sewing machine M (sewing machine body 1) or various sewing data are written.
The RAM 103 is provided with various work memories and counters, and is used as a work area during the sewing operation.
The EEPROM 104 stores, as setting means, various parameters that are input set values, such as the height from the cloth holding plate 10 on which the cloth presser 11 is disposed.

The sewing machine motor 5 is connected to the I / O interface 105 via the sewing machine motor driver 5a. The sewing machine motor driver 5a is connected to an encoder 5b that detects the rotational speed of the sewing machine motor 5 so that feedback control is possible.
Further, a sewing needle upper position sensor 5c for detecting that the sewing needle 8 is raised is connected to the sewing machine motor driver 5a. Thereby, the number of sewing needles when the stitches are formed by the sewing needles 8 is counted by the control unit 100.

  Further, the I / O interface 105 is connected to the cloth pressing portion actuator 14 via the cloth pressing portion driving circuit 14a, and is also connected to the female actuator 15 via the knife driving circuit 15a. Further, a cloth feed pulse motor 26 is connected to the I / O interface 105 via a cloth transfer device drive circuit 16, and a pulse motor 33 is connected via a cloth guide device drive circuit 17.

  The control unit 100 controls the rotation of the sewing machine motor 5 based on a predetermined program, and operates the sewing needle bar and the sewing needle 8 that move up and down by the rotation of the upper shaft (not shown) and the lower shaft (not shown). The operation of the shuttle (not shown) that rotates with the omission (not shown) (that is, the operation of the sewing machine main body 1) is controlled, and the sewing operation (the buttonhole overhanging) in the sewing machine main body 1 is controlled. Further, the control unit 100 controls the female actuator 15 so that the female 12 forms a cut hole corresponding to a predetermined button hole in the cloth.

In addition, the control unit 100 controls the cloth pressing unit actuator 14 which is a cloth pressing unit moving unit, and performs control to switch the position of the cloth pressing unit 11.
For example, when the sewing machine main body 1 forms a hole seam on the cloth placed on the upper surface of the cloth holding plate 10 as the movement control means, the control section 100 moves the cloth pressing section 11 to the cloth pressing position. Further, when the cloth transfer device 20 transfers the cloth placed on the upper surface of the cloth holding plate 10 in a predetermined direction, the cloth pressing section actuator 14 is operated so as to move the cloth pressing section 11 to an intermediate position. Take control. Further, in this movement control means, the timing when the sewing machine body 1 and the cloth transfer device 20 do not operate, and when the cloth is placed on the upper surface of the cloth holding plate 10 or when the cloth is taken out from the upper surface of the cloth holding plate 10. For this, control is performed to operate the cloth pressing portion actuator 14 so as to move the cloth pressing portion 11 to the retracted position.

In other words, the movement control means in the control unit 100 moves the cloth presser actuator 14 so that the cloth presser 11 holds and supports the cloth on the upper surface of the cloth holding plate 10 while the sewing machine main body 1 operates and a predetermined seam is sewn. Make it work. Further, the movement control means in the control unit 100 is an intermediate position lower than the retracted position which is the maximum height of the cloth presser 11 during the movement of the cloth transfer device 20 and the transfer of the cloth from a predetermined sewing place to the next sewing place. The cloth presser part actuator 14 is operated so as to move the cloth presser part 11.
While the sewing machine body 1 is sewing a predetermined seam, the cloth presser 11 holds the cloth against the upper surface of the cloth holding plate 10 and supports the cloth transfer device 20 from the predetermined sewing location to the next sewing location. When transferring the cloth, the cloth pressing portion 11 moves to an intermediate position lower than the retracted position to transfer the cloth.
As described above, by reducing the movement distance of the cloth pressing portion 11 when transferring the cloth, it is possible to reduce useless movement related to the cloth pressing operation of the cloth pressing portion 11, and from the predetermined sewing location to the next. Loss of cycle time when transferring the fabric to the sewing location can be reduced. Thereby, it is possible to reduce the work time when forming a plurality of hole stitches at a predetermined interval on the cloth.

In addition, the control unit 100 controls the cloth transfer device 20 that is a cloth transfer unit, and performs control related to the timing of transferring the cloth.
For example, as a cloth transfer control means, the control unit 100 has already started to move the cloth in a predetermined direction in the process in which the cloth pressing section actuator 14 moves the cloth pressing section 11 from the cloth pressing position to the upper intermediate position. The cloth transfer device 20 is controlled to operate as shown in FIG.
That is, the cloth transfer control means in the control unit 100 is configured such that the cloth transfer device 20 moves the cloth in a predetermined direction while the cloth pressing unit actuator 14 reciprocates the cloth pressing unit 11 from the cloth pressing position to the intermediate position. In the case of transferring a predetermined amount, the cloth transfer device 20 is operated so that the cloth transfer device 20 has already started transferring the cloth while the cloth presser 11 moves upward from the cloth pressing position.
As described above, the cloth holding unit 11 rises from the cloth holding position toward the intermediate position, and the cloth holding unit 11 releases the cloth support on the sewing machine table T, so that the cloth transfer device 20 transfers the cloth. By doing so, the loss of cycle time when transferring the cloth from a predetermined sewing location to the next sewing location can be reduced. Thereby, it is possible to reduce the work time when forming a plurality of hole stitches at a predetermined interval on the cloth.

Next, the operation of the automatic boring apparatus M (sewing machine body 1) in the present embodiment will be described based on the flowchart shown in FIG.
First, based on the main power supply of the automatic bobbin sewing device M being turned on, the control unit 100 of the automatic bobbin sewing device M uses the cloth holding plate 10 of the cloth presser unit 11 stored in advance in the EEPROM 104. Each of the height (height as an intermediate position and a retracted position), an interval for forming a hole seam (a distance at which the cloth transfer device 20 transfers the cloth), the number of the hole seams to be formed, and each of the cloth guide devices 30 Initial values of data relating to positions where the guide portions 30a and 30b are arranged are read by the CPU 101, and initial setting is performed (step S101). Then, the movement control means in the control unit 100 switches the cloth pressing unit actuator 14 to the OFF state and operates the cloth pressing unit 11 to be in the retracted position (step S102).

Next, the control unit 100 accepts an input of a drive signal when the sewing machine start switch on the operation panel 40 is pressed (step S103), and waits until the drive signal is input (step S103; No).
The operator presses the sewing machine start switch on the operation panel 40 in a state in which cloth is placed on the sewing machine table T and the sewing preparation is ready. Then, when the control unit 100 detects an input of a drive signal from the operation panel 40 (step S103; Yes), the process proceeds to step S104. Then, the control unit 100 performs a sewing operation based on a predetermined program (formation of a bouncing seam).

First, the movement control means in the control unit 100 switches the cloth pressing unit actuator 14 to the first ON state, operates the cloth pressing unit 11 to be in the cloth pressing position, and is placed on the sewing machine table T. The cloth is supported (step S104).
Next, in accordance with a predetermined program, the control unit 100 causes each part of the automatic boring sewing machine M (sewing machine body 1) to perform a sewing operation for forming one cycle worth of seams (button hole holing seams) ( Step S105).
Then, after forming a holed seam at a predetermined location, the control unit 100 determines whether or not a set number of holed seams have been formed (step S106).
When the control unit 100 determines that all the stitches are not yet formed (step S106; No), the movement control means in the control unit 100 switches the cloth pressing unit actuator 14 to the second ON state, The cloth pressing portion 11 is operated so as to be in the intermediate position (step S107). Then, the cloth transfer control means in the control unit 100 operates the cloth transfer device 20 to transfer a predetermined amount of cloth so as to correspond to the position where the next hole stitch is formed (step S108). Then, after the cloth transfer device 20 has transferred the cloth, the process returns to step S104.

  Steps S107 and S108 operate almost synchronously, and while the cloth pressing part actuator 14 reciprocates the cloth pressing part 11 from the cloth pressing position to the intermediate position, the cloth transfer is performed. The device 20 is adapted to transfer a predetermined amount of cloth in a predetermined direction. In particular, while the cloth presser 11 is moving upward from the cloth pressing position, the cloth transfer apparatus 20 is operating so that the cloth transfer apparatus 20 has already started transferring the cloth.

On the other hand, when the control unit 100 determines that all the stitches are formed (step S106; Yes), the movement control unit in the control unit 100 switches the cloth pressing unit actuator 14 to the OFF state, and the cloth pressing unit 11 is turned off. Is moved to the retracted position (step S109).
Next, the cloth transfer device 20 transfers the cloth in which all the hole stitches are formed to a stacker (not shown) (Step S110), and finishes the formation of the plurality of hole stitches based on a predetermined program. Then, the process returns to step S103.

In this way, in the automatic boring device M, while the sewing machine body 1 is sewing the boring seam at a predetermined sewing location on the cloth, the cloth presser 11 holds the cloth on the upper surface of the cloth holding plate 10 and supports it. When the cloth transfer device 20 transfers the cloth from a predetermined sewing place to the next sewing place in order to change the sewing place, the cloth holding portion 11 moves to an intermediate position lower than the retracted position to support the cloth. The cloth can be transferred.
As described above, by reducing the movement distance of the cloth pressing portion 11 when transferring the cloth, it is possible to reduce useless movement related to the cloth pressing operation of the cloth pressing portion 11, and from the predetermined sewing location to the next. Loss of cycle time when transferring the fabric to the sewing location can be reduced. Thereby, it is possible to reduce the work time when forming a plurality of hole stitches at a predetermined interval on the cloth.

Further, when the cloth holding unit actuator 14 moves the cloth holding unit 11 from the cloth holding position to the intermediate position and releases the cloth support, the cloth transfer device 20 moves the cloth in a predetermined direction by a predetermined amount. During the movement of the cloth presser 11 upward from the cloth pressing position, the cloth transfer device 20 is operated so that the cloth transfer device 20 has already started transferring the cloth.
As described above, the cloth holding unit 11 rises from the cloth holding position toward the intermediate position, and the cloth holding unit 11 releases the cloth support on the sewing machine table T, so that the cloth transfer device 20 transfers the cloth. By doing so, the loss of cycle time when transferring the cloth from a predetermined sewing location to the next sewing location can be reduced. Thereby, it is possible to further shorten the work time when forming a plurality of hole stitches at a predetermined interval on the cloth.

  Therefore, it can be said that the automatic hole sewing device M according to the present invention is an automatic sewing device capable of continuously performing a plurality of sewing operations efficiently.

In the present embodiment, an example has been described in which the intermediate position is one place between the cloth pressing position and the retracted position. However, the intermediate position is not limited to one place, and there are a plurality of two or more places. The position may be
For example, a first intermediate position between the cloth pressing position and the retracted position and a second intermediate position between the cloth pressing position and the first intermediate position may be set.

Then, when sewing a relatively thick cloth, the cloth pressing portion 11 is moved to the first intermediate position so as to release the support of the cloth, and when sewing a relatively thin cloth, The cloth pressing portion 11 may be moved to the second intermediate position to release the cloth support.
In this way, by properly using the intermediate position according to the cloth and further reducing the distance that the cloth presser 11 moves, the working time for forming the hole seam can be further shortened.

In addition, when forming a plurality of hole seams at predetermined intervals on the cloth, for example, 10 hole seams, after the sewing in the first five places, the cloth presser 11 is placed at the first intermediate position. To move the cloth from a predetermined sewing location to the next sewing location, and after sewing at the last five locations, move the fabric retainer 11 to the second intermediate position, The cloth may be transferred from a predetermined sewing location to the next sewing location.
Thus, in the automatic boring device M immediately after start-up, the first intermediate position at a relatively high position is applied, and in the automatic boring device M with a stable operation, the second at a relatively low position. By using different intermediate positions so that the intermediate position is applied and reducing the distance that the cloth presser 11 moves, the working time for forming the hole seam can be further shortened.

  In the above embodiment, an example of an automatic sewing device as an automatic sewing device in which the button hole longitudinal direction (Z-axis direction) and the cloth transport direction (X-axis direction) are orthogonal to each other will be described. However, the present invention is not limited to this, and an automatic bobbin sewing device in which the longitudinal direction of the button hole and the cloth transport direction are matched may be used. Furthermore, you may apply this invention to other sewing apparatuses, such as an automatic sewing apparatus with a button.

  In addition, it is needless to say that other specific detailed structures can be appropriately changed.

It is a perspective view which shows the boring automatic sewing apparatus concerning this invention. It is a perspective view which shows the sewing machine main body of the boring automatic sewing apparatus concerning this invention. It is explanatory drawing which shows each position of the cloth presser part in a boring automatic sewing apparatus. It is a perspective view which shows the cloth transfer apparatus in a boring automatic sewing apparatus. It is a block diagram which shows the principal part structure of the boring automatic sewing apparatus concerning this invention. It is a flowchart which shows operation | movement of the boring automatic sewing apparatus concerning this invention.

Explanation of symbols

1 Sewing machine body (sewing means)
2 Sewing frame 5 Sewing motor 8 Sewing needle 10 Cloth holding plate 11 Cloth holding part 14 Cloth holding part actuator (Cloth holding part moving means)
20 Cloth transfer device (cloth transfer means)
30 cloth guide device 40 operation panel (setting means)
100 control unit (movement control means, cloth transfer control means, setting means)
M Automatic hole sewing machine (automatic sewing machine)
T sewing machine table

Claims (3)

An automatic sewing device that continuously forms a plurality of predetermined stitches on a cloth,
A cloth holding plate on which the cloth is placed;
Sewing means for forming a predetermined seam on the cloth placed on the upper surface of the cloth holding plate;
Cloth transfer means for transferring the cloth placed on the upper surface of the cloth holding plate in a predetermined direction;
A cloth pressing part provided on the upper surface side of the cloth holding plate so as to be movable up and down;
The retraction position where the cloth pressing part is retracted above the cloth holding plate, the cloth pressing position where the cloth pressing part holds the cloth against the upper surface of the cloth holding plate, and the retraction position and the cloth pressing position. Cloth holding part moving means for moving the cloth holding part to an intermediate position between,
When the sewing means forms a predetermined seam on the cloth placed on the upper surface of the cloth holding plate, the cloth holding portion is moved to the cloth holding position, and the cloth transferring means is moved to the cloth holding plate. A movement control means for controlling the cloth pressing section moving means to move the cloth pressing section to an intermediate position when transferring the cloth placed on the upper surface in a predetermined direction;
An automatic sewing apparatus comprising:   2. The automatic sewing apparatus according to claim 1, further comprising a cloth transfer control unit that starts transfer of the cloth by the cloth transfer unit while the cloth presser is moved from the cloth pressing position to the intermediate position. .   3. The automatic sewing apparatus according to claim 1, further comprising a setting unit that arbitrarily sets a height of the cloth pressing portion from at least one of the retracted position and the intermediate position from the cloth holding plate. .

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