JPH0319796B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a workpiece positioning device in a button sewing machine.

(Prior Art and its Problems) Conventionally, workpieces have been manually set on button sewing machines, which often results in variations in button sewing positions. Further, during button attaching work, both hands are tied because the workpiece must be held down, and it is not possible to prepare for the next work while the button is being attached, resulting in poor work efficiency.

(Object of the Invention) The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a positioning device for a button sewing machine that is suitable for mass production processing and can accurately determine the button sewing position.

(Structure of the Invention) In other words, the positioning device according to the present invention includes a pair of upper and lower guide plates that hold a workpiece and transport it from a standby position on the front side of a button sewing machine to a button sewing position of the button sewing machine, and the guide plates. The present invention is characterized in that it is provided with a workpiece setting position indicating means that allows a button to be sewn in a predetermined position by setting the workpiece accordingly.

(Example) Hereinafter, an example shown in the drawings will be described.

FIG. 1 is an external view of an example of a button sewing machine equipped with a positioning device according to the present invention. The sewing machine body 3 is equipped with a workpiece positioning device 6.

The button storage device 5 consists of a storage section 13 for storing buttons and a bowl section 14 having a spiral guide path inside.
The button in 3 passes through the guideway to the bowl part 14.
It is configured to be carried on top of the A flexible flat pipe 15 is attached to the upper part of the bowl part 14, and the buttons are sequentially transferred to the button supply device 4 through this pipe 15. Reference numeral 16 denotes a diaphragm, which serves to apply vibrations to the button within the pipe 15 using vibrations transmitted from the bowl portion 14, thereby promoting its movement.

The button supply device 4 is a device that supplies the buttons sent from the button storage device 5 to a predetermined position on the sewing machine body 3, and the button supply device 4 is a device that supplies the buttons sent from the button storage device 5 to a predetermined position of the sewing machine body 3.
The upper side of this chute 20 is connected to the pipe 15, and the lower side is provided with a feeding device 22 for transferring buttons to the sewing machine body 3. Further, above the intermediate portion of the chute 20, a sequential feeding device 23 is provided for feeding the buttons in the chute 20 one by one to the feeding device 22 at predetermined intervals.
In addition, 25 is an input port for temporarily inserting into the chute 20 a different type of button having a different color, pattern, etc. from the button in the button storage 5, and 26 is an input port for temporarily inserting a different type of button into the chute 20 when using a different type of button. This is a switching device that stops the supply of buttons from the chute 20 to the chute 20.

FIG. 2 is an enlarged perspective view of main parts of the sewing machine body 3, FIG. 3 is a top view thereof, and FIG. 4 is a side view thereof. A presser foot lower plate 31 with a needle hole 30 in the center is provided on the upper surface of the sewing table 32, and above it a pair of presser foot arms 34 on the left and right,
34' is provided. Presser foot arm 34, 3
The tips of the arms 4' are button gripping parts 35, 35', which are gripped by the feeding device 22 by the arms 34, 34' swinging up and down and opening and closing left and right. Part 35, 35'
Both grips 35, 3 hold the button supplied downward.
Clamp it at the 5' interval. A head 37 is provided above these, and the sewing needle 3
9 protrudes downward. The sewing needle 39 moves up and down to attach buttons using the upper thread supplied by the thread feed arm 40 and the lower thread held below the sewing table 32.

The positioning device 6 includes a frame 42 that is movable in the front-rear direction by a pneumatic device (not shown) on the outer periphery of the sewing table 32, and a pair of upper and lower horseshoe-shaped guide plates 43, 44 are attached to the frame 42. ing. The upper guide plate 43, which is divided at the center and connected by an upper plate 46, is connected to the sewing table 3.
2, and the lower guide plate 44 is moved up and down by the action of an air cylinder 47 provided below. In addition, these guide plates 43,
The opposing surface of 44 is processed to prevent the work from slipping (F).

A sign plate 50 and a sign light 51 are provided as a workpiece setting position indicating device. Sign board 5
0 is made of transparent material, and the upper guide plate 43
It is fixed by spanning between. A level line 52 serving as an index in the front-rear direction is drawn in the left-right direction at the center. On the other hand, the indicator light 51 is
A pair of left and right lights are provided in front of the head 37, and when the guide plate 43 is stopped, the level line 52 is illuminated in a spot. These irradiation points 54, 54' serve as indicators in the left and right direction. In addition, since the illustrated button sewing machine 1 is used in the process of attaching buttons to the cuffs (setsupa part) of a suit jacket, etc., positioning marks 56, 57 for the cuff part (setsupa part) are used.
are displayed on the sign board 50 and the sewing table 32, respectively.

When attaching buttons using this device, first insert a workpiece such as a cuff between the guide plates 43 and 44 with the button attaching side facing upward, align the end with the level line 52, The irradiation point 54 (or 54') of the indicator light 51 is used to align the left and right levels of the button attachment position. When a starting switch (not shown) of the control device is turned on, air is supplied to the air cylinder 47, the piston rod 47a protrudes, and the lower guide plate 44 moves upward.
A workpiece is held between upper and lower guide plates 43 and 44. Next, the entire frame 42 moves rearward (towards the back), and stops when the button attaching position of the workpiece comes to be directly below the button held by the presser arms 34, 34'. If the position of the level line 52 of the indicator board 50 and the irradiation angle of the indicator light 51 are set in advance to adapt to a predetermined button attaching position according to the workpiece, these level lines 52 and irradiation points 54, 54 ' or positioning mark 56
By simply aligning the workpiece with a predetermined position, the workpiece can be accurately set at the button attachment position. The button attachment position may be directly aligned with the level line 52 or the irradiation points 54, 54' in the front-rear direction. Since the guide plates 43 and 44 are provided to protrude forward, positioning is easy.

Next, the sewing machine body 3 is operated to attach buttons. During the button attaching work, the work is placed on the guide plate 4.
3 and 44, and both hands are free, allowing for necessary accessory work such as preparation for the next work, which is efficient. Further, unlike the conventional method, there is no need to keep the body leaning forward to set the workpiece during button attaching work, making the work extremely easy.

After the button attachment is completed, the frame 42 moves forward and the lower guide plate 44 moves downward, returning to the initial state. The upper guide plate 43 is provided with a button relief part 60 with a wide vertical interval, so if the button is pulled out through this relief part 60 when removing the workpiece, the sewn button will be removed from the guide plate. Don't get caught by 43.

In addition, a control device is provided to interlock the positioning device 6, the sewing machine body 3, and the button supply device 4, so that by simply operating one start switch,
It would be more convenient if the setting of the workpiece, the supply of the button to the sewing machine main body 3, and the button attachment could be performed continuously.

(Effects of the Invention) As is clear from the above description, the positioning device according to the present invention enables easy and accurate setting of workpieces for button attaching, and is an excellent tool with less product variation and high work efficiency. It became a thing. Therefore, this positioning device is highly practical and suitable for button sewing machines used in mass production.

[Brief explanation of the drawing]

Fig. 1 is an external view of a button sewing machine equipped with an example of the positioning device according to the present invention, Fig. 2 is an enlarged view of its main parts, Fig. 3 is a plan view thereof, and Fig. 4 is a side view thereof. It is. 1... Button sewing machine, 3... Sewing machine body,
4...button supply device, 5...button storage, 6
...Positioning device, 15...Pipe, 20...Chute, 22...Feeding device, 23...Sequential feeding device, 25...Button slot, 32...Sewing table,
34, 34'...presser arm, 39...sewing needle,
43, 44...Guide plate, 47...Air cylinder,
50... Sign board, 51... Sign light, 52... Level line, 54, 54'... Irradiation point.

Claims (1)

[Claims] 1 A pair of upper and lower guide plates that hold the workpiece and transport it from the standby position on the front side of the button-sewing machine to the button-sewing position of the button-sewing machine, and a pair of upper and lower guide plates that set the workpieces accordingly when setting the workpieces on the guide plates. A positioning device for a button sewing machine, comprising a work set position indicating means, which allows buttons to be sewn in a predetermined position.