JPH034895A - Sewing machine for attaching root-coiled button - Google Patents

Abstract

PURPOSE:To satisfactorily execute root-coiling with the relative motion quantity in a Y direction between a needle and a button coincident with a root-coiling length L and to prevent danger that the needle is bent by providing a Y- direction moving quantity commanding means to calculate the Y-direction moving quantity of an XY table based on a signal from a detecting means and to command the moving quantity to a drive control means. CONSTITUTION:After a button 3 held by a holder is sewn to cloth 2 by a needle 7 of a sewing machine, a button holder 10 is rotated at 90 deg. by an air cylinder 50. At such a time, the button holder 10 is rotated around a straight line P passing through a sewing part 4 on the cloth 2 so that the interval L between the button 3 and cloth 2 can be maintained. Next, based on a command from a microcomputer 70, an XY drive control means 4 executes drive control to an XY table 40 and a sewing machine 9 for root-coiling sewing. However, at such a time, the Y-direction driving quantity and root-coiling number N of the XY table 40 are commanded to the XY drive control means 44 based on a signal from a setting means 60.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a neck wrapping button sewing machine.

BACKGROUND TECHNOLOGY The neck wrapping of buttons is performed by forming a seam so that the neck wrapping thread surrounds the button attached to the fabric and the button attaching thread between the fabric.

To perform this neck wrapping, for example, as shown in the needle movement diagram in Figure 6, the button 3 is held perpendicular to the sewing machine bed 1, the button thread 5 is made parallel to the sewing machine bed 1, and the cloth is There is a method of forming a seam of the neck wrapping thread 6 from a starting point A to an ending point B by moving the needle up and down while moving the needle 2 and the button 3 relative to the needle in the XY force directions.

Conventionally, a sewing machine for attaching neck-wrapping buttons uses a button holding device to hold the button at a desired distance from the fabric in a direction perpendicular to the sewing machine bed while attaching the button. 9
A neck-wrapping button sewing machine is known that performs neck-wrapping work after rotating 0 degrees. The distance between the button held by the button holding device and the cloth corresponds to the neck wrap length shown in FIG. 6, top, and this distance can be adjusted by a mechanical adjustment mechanism attached to the button holding device.

Further, the number of neck wraps is set by a neck wrap number setting switch on a control board connected to the CPU. When working on root wrapping,
The CPU controls the relative movement of the cloth and the thread in the XY force directions based on the signal from the neck wrapping number setting switch and the control program stored in the ROM, and performs neck wrapping sewing for the set number of neck wrappings.

Problems to be Solved by the Invention In the neck wrapping button sewing machine as described above, the distance between the button and the cloth and the number of neck wrappings are independently adjusted and set by a mechanical adjustment mechanism and a setting switch on the control board. was.

Therefore, if the adjustment/setting is incorrect, there is a risk that the relative motion in the Y direction between the needle and the button 3 in FIG. 6 will not match the neck wrap length L. If this relative momentum is shorter than the neck wrapping length, the quality of the product will deteriorate, and if it is longer, the needle will come into contact with the button 3, which may cause the needle to break.

Furthermore, when changing the length of the neck wrap, the number of neck wraps must also be changed, so it is necessary to operate both the control board as well as the mechanism, which takes time.

Means for Solving the Problems The neck wrapping button sewing machine according to claim 1 will be explained based on FIG. 1. It includes a sewing machine bed 1 on which a cloth is placed, and an XY table movable in XY force directions with respect to the sewing machine bed. 4
0 and button 3 mounted on the XY table.
a button holding device 1o capable of holding the button at a desired distance from the cloth 2 in the Y direction; a drive control means 44 for driving and controlling the XY table and the sewing machine motor 9 to perform neck-wrapping stitching of the button; Adjustment mechanism 20 for adjusting the
, a detection means 30 for detecting the interval adjusted by the adjustment mechanism, and a Y-direction drive amount command means for calculating the Y-direction drive amount by the XY table based on the signal from the detection means and instructing the drive control means. 73.

The neck-wrapping button sewing machine according to the second aspect of the present invention will be explained based on FIG. A button holding device 10 is mounted on a table and is capable of holding the button 3 at a desired distance from the cloth 2 in the Y direction, and an XY table and a sewing machine motor 9 are driven and controlled to perform neck wrapping sewing of the button. a drive control means 44 for adjusting the spacing, an adjustment mechanism 20 for adjusting the spacing, a detection means 30 for detecting the spacing adjusted by the adjustment mechanism, and a setting for setting the number n of neck wrappings for the basic neck wrapping length g. means 60, and neck wrap number command means 74 for calculating the number N of neck wraps according to the interval based on the signals from the setting means and the detection means and instructing the drive control means.
and.

Note that in this specification, the number of neck wrappings refers to the number of times that the neck wrapping thread 6 wraps around the button sewing thread 5, and the neck wrapping length refers to the distance between the button 3 and the fabric 2 on which the neck wrapping is sewn. a
Let's say L. Furthermore, the XY force directions refer to directions parallel to the sewing machine bed and perpendicular to each other, and among these directions, the Y direction refers to a direction parallel to the neck wrapping length L direction.

According to the neck-wrapping button sewing machine of the invention according to claim 1, the length of the neck-wrap is detected by the detection means 30, and the Y-direction drive amount of the button holding device IO is commanded based on the detection signal. The relative momentum in the Y direction between the needle and the button 3 matches the neck wrap length L.

According to the neck wrapping button sewing machine of the invention as set forth in claim 2, if the number n of neck wrappings for the basic neck wrapping length g is set by the setting means 60, the neck wrapping length is changed by the adjusting mechanism 20. At this time, the number N of neck wrappings corresponding to the changed neck wrapping length L is automatically determined.

Embodiment Hereinafter, one embodiment of the neck wrapping button sewing machine of the present invention will be described based on the drawings. FIG. 1 is a block diagram of the present embodiment, FIG. 2 is a perspective view showing the present embodiment in a state where button attachment has been completed, and FIG. 3 is a perspective view showing the same neck-wrapping state.

First, the present embodiment will be generally described based on these drawings.

2 is a sewing machine bed on which the cloth 2 is placed, and 3 is a button that is attached to a binding part 4 on the cloth 2.

Reference numeral 10 denotes a button holding device capable of holding the button 3 at a desired distance L (corresponding to the length of the neck wrap) from the binding portion 4 thereof. The spacing is adjustable by the mechanical adjustment mechanism 20 and detectable by the detection means 30.

The button holding device 10 is driven by an XY table 40 in the XY directions parallel to the sewing machine bed 1.

The XY table 40 is driven in the X direction by a step motor 41 and in the Y direction by a step motor 42.

The drive control means 44 drives and controls the two step motors 41 and 42 and the motor 9 of the sewing machine in order to perform neck wrapping stitching of the button 3.

The button holding device 10 can also be rotated 90 degrees with respect to the sewing machine bed 1 by an air cylinder 50 while maintaining the above-mentioned spacing after the button 3 is attached to the fabric.

Reference numeral 60 denotes a setting means for setting the number of neck wraps (basic number of plate wraps) n for the basic neck wrap length Q (for example, 2.5 mm), and is provided on a control board (not shown). The control board is provided with a neck wrap number display means (display) 8 for displaying the number of neck wraps N with respect to the actual neck wrap length L.

70 is a CPU which together with storage means 71 constitutes a microcomputer. The storage means 71 stores a control program for performing neck wrapping sewing, a calculation program described below, and the like, and the CPU 70 performs calculation and control according to the program.

The CPU 70 has the following functions.

(2) A function of receiving a signal from the detection means 30 and instructing the drive control means 43 to drive the Y-direction drive amount of the XY table 40 calculated according to the calculation program in the storage means 71 (corresponds to the Y-direction drive amount command means 73). ■Function to receive signals from the setting means 60 and the detection means 30 and instruct the drive/control means 43 to determine the number of neck wraps N corresponding to the length of the neck wrap calculated according to the calculation program in the storage means 71 (Number of neck wraps) (Corresponds to the command means 74.) (2) In addition, the function of controlling the drive control means 43 based on the control program of the storage means 71 in order to perform neck wrapping sewing.

The CPU 700A power section includes a detection means 30 and a setting means 60.
is connected, and the drive control means 44 and the display 8 are connected to the output section.

FIG. 4 is a plan view showing the main parts of this actual AI example, and FIG. 5 is a front view of the same. The button holding device 10, the adjustment mechanism 20, and the detection means 30 of this embodiment will be explained in detail based on these drawings.

The button holding device 10 consists of a button chuck part made up of two clamping members 11.12 that clamp the button 3, and a support part 16 provided with guide grooves 14.degree. 15 for guiding the clamping members 11.12. The clamping member 11.12 is connected to the support part 16.
Teeth 18, 19 are provided which mesh with a gear 17 attached to the holder, and by rotating the gear 17 the distance between the two clamping members 11, 12 can be changed.

The adjustment mechanism 20 includes a rack 21 provided on the support portion 16 of the button holding device 10 and a first rack 21 that engages with the rack 21.
a pinion 22, and a rotation shaft 2 common to this pinion 22.
It is composed of an adjustment dial 24 having a number of 3. Rotating axis 2
3 is provided through the attachment member 25. The button holding device 10 includes a guide 2 provided on the mounting member 25.
6 in the vertical direction.

The detection means 30 includes a second pinion 31 that meshes with the first pinion 22 of the adjustment mechanism 20, and a second pinion 31 that meshes with the first pinion 22 of the adjustment mechanism 20.
A device 32 capable of detecting the rotation of the motor 1 is composed of, for example, a pinion 31 and an encoder rotating around a common shaft 33.

Encoder 32 is connected to CPU 70. Note that a rotary switch or a potentiometer may be used instead of the encoder 32.

Next, the operation of the neck wrapping button sewing machine having the above configuration will be explained.

The distance L between the button 3 and the cloth 2 (neck wrap length) and the number n of basic plate wraps are adjusted in advance to desired values by the adjusting mechanism 20 and the setting means 60.

After the button 3 held by the holding device is attached to the cloth 2 by the needle 7 of the sewing machine in the state shown in FIG.
As shown in the figure, the button holding device 10 is rotated 90 degrees by the air cylinder 50. At this time, the button holding device 10 is attached to the cloth 2 so that the distance between the button 3 and the cloth 2 is maintained.
It rotates around a straight line P passing through the upper fitting part 4.

Next, the XY drive control means 44 drives and controls the XY table 40 and the sewing machine motor 9 to perform neck wrapping sewing based on the command from the microcomputer 70, but at this time, the amount of drive of the XY table 40 in the Y direction and the sewing machine motor 9 are The number of turns N is commanded to the XY drive control means 44 based on signals from the detection means 30 and the setting means 60.

In addition, to explain the procedure for determining the number of neck wraps N according to the length of the neck wrap, first, the neck wrap length L detected by the detection means 30 is read, and the basic number of wraps n set by the setting means 60 is determined. After reading, the number of neck wraps N for the neck wrap length L is calculated based on the following equation (1), and a command is given to the drive control means 44.

N=LXn/Q -.-(1) Finally, for confirmation, this number of neck wraps N is displayed on the display 8 on the control board.

Effects of the Invention As described above, according to the neck wrapping button sewing machine of the invention as claimed in claim 1, the relative motion in the Y direction between the needle and the button 3 matches the length of the neck wrapping, so that good neck wrapping can be achieved. can be carried out, and there is no risk of needle breakage.

Further, according to the single-leg button sewing machine of the invention as claimed in claim 2, when the number of neck wraps is changed by the adjustment mechanism, the number of neck wraps is automatically determined, so that the number of neck wraps can be changed again by the setting means. There's no need.

Therefore, the time for setting and adjustment is shortened.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the neck wrapping button sewing machine of the present invention, FIG. 1 is a block diagram, FIG. 21 is a perspective view showing a state in which button sewing has been completed, and FIG. 3 is a FIG. 4 is a plan view of the main part, FIG. 5 is a front view of the main part, and FIG. 6 is a plan view showing the movement of the hands when attaching a button for neck wrapping. 1... Sewing machine bed, 2... Cloth, 3... Button,
5...Button thread, 6...Neck wrapping thread, 10.
...Button holding device, 20...Adjustment mechanism, 30...
Detection means, 40... XY table, 44... Drive control means, 60... Setting means, 73... Y direction drive amount command means 1.74... Neck wrap number command means, L...・Neck wrapping length, Q...Basic plate wrapping length.

Claims (2)

[Claims] (1) A sewing machine bed on which the fabric is placed; an XY table that is movable in the XY direction with respect to the sewing machine bed; and a button that is attached to the XY table and holds the button a desired distance from the fabric in the Y direction. a button holding device capable of controlling the sewing machine, a drive control means for driving and controlling an XY table and a sewing machine motor to perform button neck wrapping stitching, an adjusting mechanism capable of adjusting the spacing, and detecting the spacing adjusted by the adjusting mechanism. A neck-wrapping button sewing machine comprising: a detection means for calculating a Y-direction movement amount of an XY table based on a signal from the detection means, and a Y-direction movement amount command means for instructing a drive control means. (2) a sewing machine bed on which cloth is placed; an XY table that is movable in the XY direction with respect to the sewing machine bed; and a button that is attached to the XY table and holds the button a desired distance from the cloth in the Y direction. a button holding device capable of controlling the sewing machine, a drive control means for driving and controlling an XY table and a sewing machine motor to perform button neck wrapping stitching, an adjusting mechanism capable of adjusting the spacing, and detecting the spacing adjusted by the adjusting mechanism. a detection means for setting the number of neck wraps relative to the basic length of the neck wrap; a setting means for setting the number of neck wraps for the basic neck wrap length; and a calculation means for calculating the number of neck wraps according to the interval based on signals from the setting means and the detection means and instructing the drive control means. A neck wrapping button sewing machine comprising: neck wrapping number command means;