JP6247082B2 - Hole sewing machine - Google Patents

Description

  The present invention relates to a hole sewing machine.

2. Description of the Related Art Conventionally, there is known a hole sewing machine that forms a button hole on a workpiece and a hole seam around the button hole. The boring machine is provided with a knife for forming a button hole and a knife mechanism for moving the knife up and down.
Then, when the motor is de-energized, the boring that makes it possible to manually move the knife up and down to confirm the position of the button hole formed on the sewing product and the position when re-sewing. Sewing machines are known (see, for example, Patent Document 1).

JP 2001-327782 A

However, in the case of the above-mentioned Patent Document 1, when the knife is lowered, the handle is operated to rotate the ball screw member in the direction in which the knife is lowered, and the knife is moved little by little. Therefore, the handle operation is more troublesome as the moving amount of the knife is larger.
Further, in the conventional sewing machine knife mechanism described above, when the knife motor rotates, the ball screw member is rotated via the motor gear and ball screw gear, the housing is lowered together with the ball screw nut, and the link is lowered while rotating around the link shaft. By doing so, the lever rotates clockwise, the drive shaft and pinion gear rotate in the same direction, the rack part descends, and the knife descends, so the number of parts is large and the cost is high, There has been a problem that the arrangement space of the knife mechanism becomes large.

  An object of the present invention is to provide a boring machine capable of easily moving a knife manually even in a state where the excitation of a motor is cut off while simplifying the knife mechanism.

In order to solve the above problems, the invention described in claim 1
Needle driving means for driving the sewing needle up and down;
Cloth holding means for holding the workpiece,
In a boring machine comprising a moving means for relatively moving the sewing needle and the cloth pressing means,
A female motor, a link arm connected at one end to the motor shaft of the female motor via an eccentric block, a female drive shaft connected to the other end of the link arm, and a female held at the lower end of the female drive shaft And the eccentric block and the link arm constitute a crank, and the rotary movement of the knife motor is converted into the vertical movement of the knife drive shaft to move the knife up and down to move the buttonhole to the sewing product. A female mechanism to form
When an operation for confirming the descending position of the knife with respect to the sewing object is performed, the knife motor is driven, and the eccentric block and the link arm are arranged in parallel with each other. Motor stop control means for stopping excitation of the motor after the knife is moved to a non-parallel arrangement so that the knife can be moved manually.

The invention described in claim 2
Needle driving means for driving the sewing needle up and down;
Cloth holding means for holding the workpiece,
In a boring machine comprising a moving means for relatively moving the sewing needle and the cloth pressing means,
A female motor, a link arm connected at one end to the motor shaft of the female motor via an eccentric block, a female drive shaft connected to the other end of the link arm, and a female held at the lower end of the female drive shaft And the eccentric block and the link arm constitute a crank, and the rotary movement of the knife motor is converted into the vertical movement of the knife drive shaft to move the knife up and down to move the buttonhole to the sewing product. A female mechanism to form
When the operation of operating the moving means is performed so that the knife moves the sewing object so that the sewing object is disposed at a knife driving position where a button hole is formed at a predetermined position of the sewing object, the knife motor is driven, The eccentric block and the link arm are shifted from the parallel arrangement to the non-parallel arrangement of the eccentric block and the link arm so that the knife can be manually moved, and then the motor is excited. And a motor stop control means for stopping the motor.

The invention according to claim 3 is the boring machine according to claim 1 or 2,
When an operation for switching off the power source of the perforating sewing machine is performed, a sewing machine stop control means for switching the power source off after making the knife capable of being manually moved is provided.

  According to the present invention, it is possible to easily move the knife manually even in a state where the excitation of the motor is cut off while simplifying the knife mechanism.

It is an external appearance perspective view which shows the hole sewing machine in this embodiment. It is a rear view which shows the hole sewing machine in this embodiment. It is a schematic perspective view which shows the internal structure of the hole sewing machine in this embodiment. It is a perspective view which shows the knife mechanism of a hole sewing machine. It is a front view which shows the knife mechanism of a hole sewing machine, and has shown the state which moved the knife to the highest point which is a standby position. It is a front view which shows the knife mechanism of a hole sewing machine, and has shown the state which moved the knife to the position of the cutting start which a knife is located just above fabric. It is a front view which shows the knife mechanism of a hole sewing machine, and has shown the state which moved the knife to the lowest point. It is an external appearance front view which shows an operation panel. It is a block diagram which shows the control part of the hole sewing machine in this embodiment. It is a front view which shows the knife mechanism of a hole sewing machine, and has shown the state switched to the arrangement | positioning which can move a knife manually. It is explanatory drawing which shows an example of the hole seam data in a hole sewing machine.

Hereinafter, a hole sewing machine 10 according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an external perspective view of a hole sewing machine 10, and FIG. 2 is a rear view thereof. FIG. 3 is a schematic perspective view showing the internal structure of the hole sewing machine 10.

  As shown in FIGS. 1 and 2, the boring machine 10 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 arm portion 2a that extends above and below the perforated sewing machine 10 and extends in the front-rear direction. A sewing machine bed portion 2b that extends below the perforated sewing machine 10 and extends in the front-rear direction. And a standing body 2c that connects 2b.

  As shown in FIGS. 1 and 3, the hole sewing machine 10 includes a needle driving means 30 that drives the sewing needle 1 up and down, a cloth pressing means 40 that presses and holds the cloth to be sewn, and the sewing needle 1. Moving means 50 for relatively moving the cloth pressing means 40, a shuttle mechanism 60 provided in the sewing machine bed 2b, and a female mechanism 70 as a cloth cutting means for forming a button hole in the cloth. ing.

As shown in FIG. 3, the needle driving means 30 includes an upper shaft 31 that is rotatably supported in a state along the front-rear direction inside the sewing machine arm portion 2 a, and a sewing machine motor that is connected to one end of the upper shaft 31. 32, a crank mechanism 33 provided at the other end of the upper shaft 31, and a needle bar 34 to which a vertical driving force is transmitted by the crank mechanism 33 at the tip of the sewing machine arm 2a.
The needle bar 34 holds the sewing needle 1 in a replaceable manner at the lower end thereof, and the needle bar 34 is supported by a moving means 50 described later so as to be swingable in the left-right direction inside the sewing machine arm portion 2a. Yes.
The needle driving means 30 then drives the sewing needle 1 to move up and down at the same cycle as the output rotational speed of the sewing machine motor 32 with the above configuration.

  As shown in FIG. 3, the cloth presser 40 holds a cloth holding plate 41 movably mounted on the upper surface of the sewing machine bed portion 2 b and presses the cloth from above the cloth holding plate 41 to hold the cloth. A cloth holding frame 42 that holds the cloth between the plate 41, a frame support 43 provided on the upper surface of the cloth holding frame 42, and a holding state and a released state that hold the cloth by raising and lowering the cloth holding frame 42. And a press-up solenoid 44 (see FIG. 9).

The cloth presser frame 42 is a rectangular frame, and the inside of the cloth presser frame 42 penetrates up and down, and a stitched seam is performed in the inner region of the frame. That is, the sewing needle 1 is arranged to move up and down inside the cloth presser frame 42. Similarly, a knife 71 (to be described later) of the knife mechanism 70 is also arranged to move up and down inside the cloth presser frame 42.
The cloth holding frame 42 can be exchanged for a plurality of different sizes. In other words, by using a larger cloth presser frame 42, it is not necessary to adjust the position by re-setting the fabric, and a larger through-hole can be formed inside the cloth presser frame 42 while keeping the cloth presser. It is possible to form a plurality of hole seams, decorative seams and the like over a wide range.
In addition, since the cloth is sandwiched between the cloth holding frame 42 and the cloth holding plate 41, a through hole through which the sewing needle 1 and the knife 71 are inserted downward is formed in the cloth holding plate 41.

  Further, the cloth presser frame 42 is supported by a support arm 51 of the moving means 50 described later so that the cloth presser frame 42 can be moved up and down, and the press-up solenoid 44 gives an operation in the vertical direction to the cloth presser frame 42 in the supported state. When the user performs an input operation with the press-up input pedal 44b (see FIG. 9), the press-up solenoid 44 is switched between driving in the pressing direction and driving in the release direction.

  As shown in FIG. 3, the moving means 50 includes a support arm 51 that supports the cloth pressing frame 42 via a frame support 43 at the front end thereof, a rear end portion of the support arm 51, and a rear end of the cloth holding plate 41. And a rack that meshes with a pinion gear provided on an output shaft of the feed motor 53. A drive transmission shaft 54 that is formed and driven in the front-rear direction, and a needle that is supported swingably about an axis along the front-rear direction in the upper part of the sewing machine arm 2a and supports the needle bar 34 so as to be movable up and down The bar support 55, the swing drive shaft 56 that swings the needle bar support 55 via the arm provided at the tip thereof, and the swing drive shaft 56 swings at an arbitrary swing angle. Not driveable diagram And a known rocking drive mechanism and the needle oscillating motor 57 (see FIG. 9).

The support arm 51 is supported at the rear end portion thereof by a support member 52 so as to be rotatable about a left and right axis, thereby raising and lowering the cloth holding frame 42 on the front end side with respect to the cloth holding plate 41. The fabric can be switched between holding and releasing.
The cloth pressing frame 42 and the cloth holding plate 41 are both moved and positioned in the front-rear direction by the same movement amount via the support arm 51 and the support body 52. Further, the needle bar support 55 that supports the needle bar 34 swings about the axis along the front-rear direction via the swing drive shaft 56, whereby the tip of the sewing needle 1 is moved in the left-right direction and positioned. Is done. Therefore, it is possible to drop the sewing needle 1 at an arbitrary position with respect to the plane of the cloth held by the cloth holding frame 42 and the cloth holding plate 41.

  As shown in FIG. 3, the shuttle mechanism 60 is disposed in the vertical trunk portion 2 c, and is disposed in the vertical axis 61 that is transmitted with torque from the upper shaft 31 via the bevel gear, and in the sewing machine bed portion 2 b, and is A lower shaft 62 to which torque is transmitted from a shaft 61 via a bevel gear, and a hook 63 that is rotationally driven at a front end portion of the lower shaft 62 are provided. The shuttle 63 is rotationally driven in synchronization with the vertical movement cycle of the sewing needle 1, and the seam is formed on the fabric by the cooperation of the sewing needle 1 and the shuttle 63. The hook 63 is the same as a conventionally known one, and the structure thereof will not be described in detail.

As shown in FIGS. 4 and 5, the knife mechanism 70 includes a knife motor 72 including a stepping motor disposed in the left side cover 2 d (see FIG. 2) and serving as a drive source for moving the knife 71 up and down, and a motor of the knife motor 72. A link arm 74 having one end 74a connected to the shaft 720 via an eccentric block 73, a female drive shaft 76 fixed to a shaft holding portion 75 provided at the other end of the link arm 74, and a female drive shaft 76 The knife holding body 77 provided at the lower end of the knife and the knife 71 held by the knife holding body 77 are provided.
In addition, a roller member 78 is provided in the shaft holding portion 75, and this roller member 78 is disposed so as to be vertically movable along a long hole 79 a of a guide member 79 fixed to the inner surface of the sewing machine frame 2. Yes.
The eccentric block 73 and the link arm 74 in the knife mechanism 70 constitute a crank, and the rotary motion of the knife motor 72 is converted into the vertical movement of the knife drive shaft 76. That is, the rotary motion of the female motor 72 is converted into the reciprocating motion of the shaft holding portion 75 by the eccentric block 73 and the link arm 74, and the shaft holding portion 75 including the roller member 78 extends along the elongated hole 79 a extending in the vertical direction. Thus, the knife drive shaft 76 moves up and down, and the knife 71 moves up and down.
For example, FIG. 5 shows a state in which the knife mechanism 70 moves the knife 71 to the uppermost point (origin) that is the standby position. FIG. 6 shows a state in which the knife mechanism 70 moves the knife 71 to the starting position so that the knife 71 is arranged immediately above the fabric P held by the cloth pressing means 40. FIG. 7 shows a state in which the knife mechanism 70 moves the knife 71 to the lowest point so as to form a button hole in the cloth P held by the cloth pressing means 40.

Further, the hole sewing machine 10 has an operation panel 20 on which an operator performs various settings and operations necessary for sewing. FIG. 8 is an external front view of the operation panel 20.
The operation panel 20 and the sewing machine main body (control unit 100) are connected by a wired or wireless line (not shown). As shown in FIG. 8, the operation panel 20 includes a display unit 20a that displays various settings and operation states of the sewing machine. The display unit 20a is a so-called touch panel switch, and various setting inputs and various setting values and setting conditions are displayed by various keys and buttons displayed.
The operation panel 20 is provided with various switches (for example, a female position confirmation switch 21) in addition to the touch panel switch.

Next, the control unit 100 of the boring machine 10 will be described.
As shown in FIG. 9, the boring machine 10 is connected to a sewing machine motor 32, a feed motor 53, a needle swing motor 57, a female motor 72, a press-up solenoid 44, a press-up input pedal 44b, a control panel 20, and the like. Part 100.
The control unit 100 controls the rotational speed of the sewing machine motor 32, the amount of cloth fed by the feed motor 53, the driving timing and swing width of the needle swing motor 57, the lowering timing of the knife 71, the up / down switching of the cloth presser frame 42, and the like. Yes. 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 control unit 100 is connected to a power switch 200 that switches on / off the drilling machine 10.

The sewing machine motor 32 is connected to the I / O interface 105 via the sewing machine motor driver 32a. The sewing machine motor driver 32a is connected to an encoder 32b that detects the rotational speed of the sewing machine motor 5 so that feedback control is possible.
The feed motor 53 is connected to the I / O interface 105 via a feed motor driver 53a. The needle swing motor 57 is connected to the I / O interface 105 via a needle swing motor driver 57a. A female motor 72 is connected to the I / O interface 105 via a female motor driver 72a.
Furthermore, a press-up solenoid 44 is connected to the I / O interface 105 via a press-up drive circuit 44 a, and a press-up pedal 44 b is connected to the I / O interface 105.

The control unit 100 receives various stitch data stored in the ROM 102 by the CPU 101 using the work area of the RAM 103 to receive setting input of stitch data relating to the sewing pattern, and each part of the sewing machine based on the set stitch data. Is executed to control sewing.
The RAM 103 and the EEPROM 104 in the control unit 100 function as stitch data storing means, and store hole stitch data corresponding to the shape of the hole stitch.

Then, the control unit 100 controls each part of the sewing machine based on the hole stitching data in the stitch data stored in the RAM 103 or the EEPROM 104 to form a button hole and a hole stitch around the button hole. Function as.
In the hole sewing machine 10, the needle driving means 30, the cloth pressing means 40, and the moving means 50 cooperate to form a hole seam in the fabric, and then operate the knife 71 (female mechanism 70) to operate the button. A hole is formed.

In addition, when an operation for confirming the position of the knife 71 with respect to the fabric is performed, the control unit 100 drives the knife motor 72 to a position where the knife 71 can be manually moved, and then the excitation of the knife motor 72 is performed. Functions as a motor stop control means for stopping the motor.
For example, the user holds the knife holding body 77 in order to confirm the position at which the button hole is formed by the knife 71 and the interference between the knife 71 and the cloth presser frame 42 when the hole seam is formed in the fabric. The knife 71 may be manually moved up and down.
At this time, the state in which the knife mechanism 70 moves the knife 71 to the uppermost point (origin) that is the standby position (see FIG. 5), that is, the arrangement in which the eccentric block 73 and the link arm 74 are parallel to each other is the knife drive shaft 76. Even if a vertical force is applied to the arm, the crank that is composed of the eccentric block 73 and the link arm 74 is stopped at a dead point where the moment for rotating the crank does not occur. The problem of being unable to move is caused. In order to prevent the cloth from hitting the knife 71 and damaging the cloth when it is set on the cloth holding frame 42 on the sewing machine bed 2b, when the sewing machine driving is stopped when the power of the perforating sewing machine 10 is ON. The knife 71 is set to retract to the standby position that is the uppermost point.
Therefore, when an operation for confirming the position of the knife 71 with respect to the fabric is performed by the user, the control unit 100 as the motor stop control means drives the knife motor 72 so as to rotate the motor shaft 720 by a predetermined amount. The eccentric block 73 and the link arm 74 shown in FIG. 5 are shifted from the parallel arrangement to the arrangement where the eccentric block 73 and the link arm 74 are not parallel as shown in FIG. After making it possible to manually move it up and down, the current supply to the female motor 72 is stopped and the excitation is stopped.
If the eccentric block 73 and the link arm 74 are not parallel to each other as in the knife mechanism 70 shown in FIG. 10 and the excitation of the knife motor 72 is stopped, the user manually moves the knife 71 up and down. Therefore, for example, as shown in FIG. 6, it is possible to confirm the position where the button hole is formed in the fabric P by moving the knife 71 directly above the fabric P held by the fabric pressing means 40. it can.

Here, the operation for confirming the position of the knife 71 performed by the user is, for example, an operation of pressing the knife position confirmation switch 21 (see FIG. 8) on the operation panel 20.
That is, when the user presses the knife position confirmation switch 21 on the operation panel 20, the knife mechanism 70 switches from the arrangement shown in FIG. 5 in the standby state to the arrangement shown in FIG. 10, and the user manually moves the knife 71 up and down. It becomes possible.

Specifically, an operation in which the user presses the knife position confirmation switch 21 on the operation panel 20 is an operation for confirming the position of the knife 71 with respect to the cloth, and the knife 71 forms a button hole at a predetermined position of the cloth. This is an operation for operating the moving means 50 so as to place the fabric at the knife driving position.
When the user performs an operation of depressing the knife position confirmation switch 21, the control unit 100 as a motor stop control unit controls each part of the sewing machine so that the knife 71 forms a button hole at a predetermined position on the cloth. Then, after the knife motor 72 is driven to a position at which the user can manually move the knife 71, the excitation of the knife motor 72 is stopped.

For example, as shown in FIG. 11, for example, as shown in FIG. 11, the hole stitching data in the hole sewing machine 10 is obtained by moving the cloth holding frame 42 holding the cloth and the cloth holding plate 41 in the front-rear direction (X direction). The movement amount and the Y movement amount by which the moving means 50 moves the needle bar 34 and the sewing needle 1 in the left-right direction (Y direction), a needle movement pattern that makes a pair for each needle, and knife driving, thread trimming, etc. Contains commands. In the case of the hole stitching data in FIG. 11, a knife drive command is incorporated after the 113th stitch among all 119 stitches.
When the hole stitching data shown in FIG. 11 is selected and an operation of pressing the knife position confirmation switch 21 is performed, the moving means 50 is activated to place the fabric at the knife driving position, which is the 113th stitch, and the knife After each part of the mechanism 70 is switched to the arrangement shown in FIG. 10 and the knife 71 can be manually moved up and down, processing for stopping excitation of the knife motor 72 is executed.
As described above, when the operation of depressing the knife position confirmation switch 21 is performed on the boring machine 10, the respective parts of the knife mechanism 70 are switched to the arrangement shown in FIG. 10, for example, and the knife 71 can be manually moved up and down. Since it becomes possible, the position where the button hole is formed in the fabric can be confirmed by moving the knife 71 directly above the fabric.

In addition, when an operation for switching off the power of the boring machine 10 is performed, the control unit 100 drives the knife motor 72 to a position where the knife 71 can be manually moved, and then switches the power of the sewing machine off. It functions as a sewing machine stop control means.
For example, when the user presses the power switch 200 and switches off the power of the boring machine 10, the control unit 100 as the sewing machine stop control means rotates the motor shaft 720 by a predetermined amount. And the eccentric block 73 and the link arm 74 shown in FIG. 5 are shifted from the parallel state to a position where the eccentric block 73 and the link arm 74 are not parallel as shown in FIG. However, after the knife drive shaft 76 can be manually moved up and down, current supply to each part of the sewing machine is stopped to stop the sewing machine.
That is, when the power of the boring machine 10 is switched off, each part of the knife mechanism 70 is switched to the arrangement shown in FIG. 10, for example, and the knife 71 can be manually moved and then stopped. The position 71 can be easily confirmed.

The control unit 100 serving as the motor stop control unit described above controls each part of the sewing machine when the user performs an operation of pressing down the knife position confirmation switch 21 so that the knife 71 forms a button hole at a predetermined position of the fabric. The cloth is arranged at the scalpel driving position and the scalpel motor 72 is driven to a position where the scalpel 71 can be moved manually, and then the excitation of the scalpel motor 72 is stopped. After the excitation is stopped, the power of the boring machine 10 may be switched off.
Then, after the power of the boring machine 10 is switched off and the position of the knife 71 relative to the fabric is confirmed in a relatively safe state where the knife mechanism 70 does not operate, a predetermined switch (for example, the power switch 200) is pressed. When the sewing machine is restarted, for example, the sewing machine 10 may be returned to the state immediately before the power is turned off so that the sewing can be continued.

As described above, in the case of the boring machine 10 according to the present embodiment, when the knife position confirmation switch 21 or the power switch 200 is pressed, each part of the knife mechanism 70 is arranged as shown in FIG. Since it is switched, the knife can be easily moved up and down manually.
If the knife 71 can be manually moved up and down in the hole sewing machine 10, the knife 71 can be moved immediately above the fabric to confirm the position where the button hole is formed on the fabric. It is possible to easily check the dropping position and position the fabric based on the button hole when re-sewing.

  The application of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Sewing needle 2 Sewing frame 10 Hole sewing machine 20 Operation panel 21 Knife position confirmation switch 30 Needle drive means 40 Cloth pressing means 50 Movement means 60 Hook mechanism 70 Female mechanism 71 Female 72 Female motor 720 Motor shaft 73 Eccentric block 74 Link arm 76 Female Drive shaft 100 control unit (motor stop control means, sewing machine stop control means)
200 Power switch P Cloth (Sewing product)

Claims (3)

Needle driving means for driving the sewing needle up and down;
Cloth holding means for holding the workpiece,
In a boring machine comprising a moving means for relatively moving the sewing needle and the cloth pressing means,
A female motor, a link arm connected at one end to the motor shaft of the female motor via an eccentric block, a female drive shaft connected to the other end of the link arm, and a female held at the lower end of the female drive shaft And the eccentric block and the link arm constitute a crank, and the rotary movement of the knife motor is converted into the vertical movement of the knife drive shaft to move the knife up and down to move the buttonhole to the sewing product. A female mechanism to form
When an operation for confirming the descending position of the knife with respect to the sewing object is performed, the knife motor is driven, and the eccentric block and the link arm are arranged in parallel with each other. A boring machine comprising: motor stop control means for stopping excitation of the motor after the knife is moved to a non-parallel arrangement so that the knife can be moved manually. Needle driving means for driving the sewing needle up and down;
Cloth holding means for holding the workpiece,
In a boring machine comprising a moving means for relatively moving the sewing needle and the cloth pressing means,
A female motor, a link arm connected at one end to the motor shaft of the female motor via an eccentric block, a female drive shaft connected to the other end of the link arm, and a female held at the lower end of the female drive shaft And the eccentric block and the link arm constitute a crank, and the rotary movement of the knife motor is converted into the vertical movement of the knife drive shaft to move the knife up and down to move the buttonhole to the sewing product. A female mechanism to form
When the operation of operating the moving means is performed so that the knife moves the sewing object so that the sewing object is disposed at a knife driving position where a button hole is formed at a predetermined position of the sewing object, the knife motor is driven, The eccentric block and the link arm are shifted from the parallel arrangement to the non-parallel arrangement of the eccentric block and the link arm so that the knife can be manually moved, and then the motor is excited. A boring machine comprising motor stop control means for stopping the machine.   The sewing machine stop control means for switching the power off after making the knife capable of being manually moved when an operation for switching the power of the boring machine off is performed. The boring machine according to 1 or 2.

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