JPH04347193A - Sewing device for buttonning - Google Patents

Abstract

PURPOSE:To enable a buttonning device to be economically simply set to a sewing machine by guiding a button inclined at a predetermined angle to a sewing needle along a guide means to a button holding mechanism. CONSTITUTION:A button holding mechanism 4 has button holders 12, 13 slidable along a groove formed in a mounting plate 11 and can hold the center of a button 1 with holding arms 12a, 13a of the tip at a predetermined position irrespective of the dimension of the button when the button holder slides the left and right sides. The whole mounting plate 11 fixed to a block 17 of a vertically moving mechanism 16 is vertically moved through an adjusting knob 18. The button 1 is shifted by the pivoting of the button holding mechanism 4 to a position where the button 1 inclined by a predetermined angle R to a sewing needle 3 shown by the dot-dash line is set to a sewing machine and a position where the button 1 parallel to the sewing needle 3 shown by the solid line is sewn on a clothing fabric for attachment and winding of root. The inclination R is set to 15-75 deg., preferably about 45 deg..

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a button sewing device,
More specifically, the present invention relates to a button sewing device that sews the button onto the fabric by sewing the button onto the fabric and then sewing the sewing thread between the button and the fabric from the left and right directions and wrapping the button around the neck.

0002

2. Description of the Related Art When sewing buttons onto fabric, the button is sewn by feeding the button onto the fabric set in a sewing machine and moving the needle to the button. After that, in order to secure the sewing part, the button is placed upright against the fabric, and the sewing thread between the fabric and the button is wrapped around each side from the left and right sides, and the button is sewn onto the fabric using a single thread chainstitch.

[0003] Such sewing machines can produce shank buttons and marble buttons that have parallel button holes on the back side along the surface, such as the front buttons of men's and women's jackets and vests, and the gold buttons of student uniforms. When sewing on various types of sewing items, unlike flat buttons, the sewing thread is not exposed on the surface of the button or fabric, resulting in a clean finish. By applying a neck wrap, it not only increases the sewing strength of the button, but also makes it possible to hold the button securely while floating on the fabric, making it easier to fit into the button hole. has advantages.

When sewing such a shank button or marble button, the button hole is parallel to the back side of the button, so the button is attached parallel to the sewing machine needle and attached to the fabric and wrapped. is being carried out.

[0005]

[Problems to be Solved by the Invention] By the way, in this type of button sewing device, when setting a button on a sewing machine to sew a button, if the button is set perpendicular to the sewing machine needle, it is difficult to locate the button hole. If you are unable to accurately position and set the button, and if you set the button parallel to the sewing machine needle, it will be difficult to set the button because the sewing machine needle is close to it, and it will be difficult to see the buttonhole, making it difficult to set the button parallel to the sewing machine needle. There is a problem that parallelism cannot be achieved.

[0006] In order to solve this problem, buttons are set using another device such as a button loader or a button preset device, but this method has the disadvantage that the cost increases due to the use of another device. be.

[0007] Therefore, the present invention has been made to solve these drawbacks, and an object of the present invention is to provide a button sewing device that can set buttons in a sewing machine at low cost and in a simple manner when sewing buttons. The task is to

[0008]

[Means for Solving the Problems] In order to solve these problems, the present invention, after sewing buttons onto fabric, stitches the sewing thread between the button and the fabric from the left and right directions for neck wrapping. A button sewing device that sews buttons onto fabric includes a holding mechanism that holds the button, a first position where the holding mechanism is inclined at a predetermined angle with respect to the sewing machine needle, and a second position where the holding mechanism is approximately parallel to the sewing machine needle. and means for guiding the button to the holding mechanism in the first position, and after setting the button in the first position, sewing the button onto the fabric and sewing the button in the second position. We adopted a configuration that involves root wrapping.

[0009]

With this structure, when a button is set on a sewing machine, the button is guided to the button holding mechanism along the guide means at a position inclined at a predetermined angle with respect to the sewing machine needle. Therefore, it becomes easy to set the button in the holding mechanism, and it is also possible to set the button so that the button hole is reliably parallel to the sewing machine needle. This can prevent the sewing machine needle from breaking due to the buttonhole and the sewing machine needle becoming non-parallel during sewing.

In a preferred embodiment, the guide means for guiding the button to the holding mechanism when setting the button is a guide pin that passes through the buttonhole when setting the button and retreats from the buttonhole when sewing the button, or a guide pin that guides the button to the holding mechanism when setting the button. It consists of reflective plates or signs for guidance.

When setting a button, the button is guided into the button holding mechanism and set there at an angle in the range of about 15 to 75 degrees, preferably about 45 degrees, with respect to the sewing machine needle.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below according to embodiments shown in the drawings.

FIG. 1 shows a shank button and a marble button 1 (with buttonholes formed parallel to the back of the button).
A single-thread chainstitch sewing machine 2 equipped with a sewing machine needle 3 for sewing a button (hereinafter simply referred to as a button) is shown. This sewing machine 2 is provided with a button holding mechanism 4 (not shown in FIG. 1) that holds the button during sewing, and a guide device 5 that guides the button to the holding mechanism during button setting. Note that 2a is the bed of the sewing machine.

The button retention mechanism 4 is shown in detail in FIG. The button holding mechanism 4 has button holders 12 and 13 that are slidable along grooves formed in the mounting plate 11. A rack is formed on the inner surface of each button holder 12, 13, and by rotating a pinion 14 attached to the mounting plate 11, the button holder 12, 13 is attached to the spring 1.
It can be slid against the urging force of 5. The tips of the button holders 12 and 13 are holding arms 12a and 13a, and when the button holders slide left and right, the holding arms adjust the center of the button 1 to a predetermined position regardless of its dimensions. It is possible to hold it.

The mounting plate 11 of the button holding mechanism 4 is fixed to the block 17 of the up-and-down mechanism 16, and the adjustment knob 18
The entire button holding mechanism 4 can be moved up and down via the button. The height of the button 1 held between the holding arms 12a and 13a of the button holder can be adjusted by moving the button holding mechanism 4 up and down. Further, the vertical mechanism 16 is connected to the shaft 2.
0, and the vertical mechanism 16 and button holding mechanism 4 can actuate the air cylinder cylinder 22 to rotate the lever 21 around the shaft 20.

Due to the rotation of this button holding mechanism, the button 1
is the position indicated by the dashed line in Fig. 3, that is, sewing machine needle 3.
The sewing machine needle 3 is moved to a position inclined at a predetermined angle R relative to the sewing machine needle 3 and a position parallel to the sewing machine needle 3 shown by a solid line. The slanted position is the position where the button is set on the sewing machine, and the position parallel to the sewing machine needle is the position where the button is sewn onto the fabric, where it is sewn onto the fabric, and the subsequent neck wrapping is performed. The inclination angle R is
It is set at an angle of 15 to 75 degrees, preferably about 45 degrees. Stoppers 23, 24 are provided on the button holding mechanism to position the button and button holding mechanism at respective positions.

FIG. 4 shows a guide device that guides the button 1 to a holding position by the button holding mechanism when the button 1 is set on the sewing machine. The guide device 5 has a guide pin 30 that is passed through the button hole 1a of the button 1 and guides the button to a holding position where it is held by the holding arms 12a, 13a of the button holding mechanism. This guide pin 30 is coupled to a plunger 33 that is moved forward and backward by an air cylinder 31 via an elastic coupling member 32. The reason why the connecting member has elasticity is to supplement and absorb the position of the buttonhole which varies depending on the shape of the button. The entire guide device 5 is attached to a mounting plate 34 fixed to the sewing machine body.

Next, the operation of the button sewing machine constructed as described above will be explained using the flowchart shown in FIG.

First, a button is set in step S1. At this time, the button holding mechanism 4 is in the position indicated by the dashed line in FIG. 3, and the guide device 5 is in the position where the guide pin 30 protrudes from the air cylinder as shown in FIG. The button 1 is inserted from the direction F in FIG. 4 so that the button hole 1a passes through the guide pin 30. Next, step S
2, the cloth 41 is set on the tongue 40 (the tongue and cloth are shown in FIG. 7) and moved to the button attachment position. Next, in step S3, the sewing machine pedal is turned on, and in step S4, the air cylinder 31 is activated to release the guide pin 30.
from the buttonhole 1a.

Next, in step S5, the button is moved to the position shown in FIG. 7(B) by an X-Y mechanism (not shown), and in step S6, the holding arms 12a and 13a of the button holding mechanism are actuated to fix the button. do. Button 1 is holding arm 1
The state before being fixed to 2a and 13a is shown in FIG. 6(B), and the state after being fixed is shown in FIG. 6(A) and (C). Thereafter, in step S7, the air cylinder 22 is operated to move the button 1 to the vertical position shown by the solid line in FIG. Thereafter, in step S8, the knee switch is activated to perform button sewing (step S9). Step S10, S
At step 11, a predetermined number of stitches are sewn using a stitch counter (not shown). This state is shown in FIG. 7(A). Then step S
In steps 12 to S14, the sewing machine performs a predetermined number of stitches, and in step S15, the sewing machine is stopped. In step S16, the air cylinder 22 is operated again to move the button to the inclined position shown in FIG.

Subsequently, after the thread is cut in step S17, the button is released from being fixed by the holding arms 12a and 13a in step S18. Thereafter, the holding mechanism is moved to the position shown in FIG.
0 through the buttonhole 1a to complete the series of operations.

In the above-mentioned embodiment, a guide pin that moves forward and backward into the button hole was used as a guide device when setting the button, but as shown in FIG.
The button may be guided to the set position via a reflective plate 43 attached to the mounting plate 42 via a mounting plate 42 or other markings. In this case, the reflective surface or indicator surface is made substantially perpendicular to the slope line of the button 1 to facilitate visual inspection. In this embodiment, an air cylinder for moving the guide pin forward and backward can be omitted, resulting in an inexpensive configuration.

[0023]

[Effects of the Invention] As explained above, in the present invention, when a button is set on a sewing machine, the button is guided to the button holding mechanism along the guide means at a position inclined at a predetermined angle with respect to the sewing machine needle. Therefore, it becomes easier to set the button in the holding mechanism, and it is also possible to set the button so that the button hole is reliably parallel to the sewing machine needle. This can prevent the sewing machine needle from breaking due to the buttonhole and the sewing machine needle becoming non-parallel during sewing. Furthermore, since there is no need to set the buttons using a special and expensive setting device, an inexpensive device can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing the configuration of a sewing machine of a sewing device according to the present invention.

FIG. 2 is a perspective view showing the configuration of a button holding mechanism.

FIG. 3 is an explanatory diagram illustrating rotation of the button by the button holding mechanism.

FIG. 4 is a side view showing the configuration of a guide device that guides the button to the set position.

FIG. 5 is a flow chart showing the flow of control.

FIG. 6 is an explanatory diagram illustrating how a button is held by a button holding mechanism.

FIG. 7 is an explanatory diagram illustrating a button attachment process.

FIG. 8 is a configuration diagram showing another embodiment of the guide device.

[Explanation of symbols]

1 button 1a Buttonhole 4 Button retention mechanism 5 Guide device 12a, 13a Holding arm 30 Guide pin 43 Reflector

Claims (5)

[Claims] Claim 1: A holding mechanism for holding a button in a button-sewing device that sews a button onto a fabric by sewing the sewing thread between the button and the fabric from the left and right and wrapping the button around the fabric. and means for rotating the holding mechanism between a first position inclined at a predetermined angle with respect to the sewing machine needle and a second position substantially parallel to the sewing machine needle, and holding the button in the first position. 1. A button-sewing device comprising: a means for guiding the button to the mechanism, and after setting the button at the first position, sewing the button onto the fabric and wrapping the button at the second position. 2. The button sewing device according to claim 1, wherein the guide means is a guide pin that passes through the buttonhole in the first position and retreats from the buttonhole in the second position. 3. The button sewing device according to claim 1, wherein the guide means is a reflective plate or a marker that guides the button in the first position. 4. Buttoning according to claim 1, characterized in that the inclination in the first position is at an angle in the range of about 15 to 75 degrees with respect to the sewing machine needle. sewing equipment. 5. The button sewing device according to claim 4, wherein the slope in the first position is at an angle of about 45 degrees with respect to the sewing machine needle.