JPS61277510A - Automatic button feeder - Google Patents

Abstract

PURPOSE:To reject a button at the time of detecting the button reverse side as well as to control the motion of a sewing machine, by installing a device, detecting both sides of the button with a light quantity difference in reflected light, in the point midway in a button route on a button set table at the time of button sewing. CONSTITUTION:The button B1 reached to a tip end of a chute 27 is extruded to a position 4, with its own weight, by an inclined part in the midway of the chute 27. In this position 4, there is provided with a button obverse-reverse detecting device 5, and when the button B1 becomes reversed, a light quantity difference in reflected light between the button B1 and a model button Br is detected by the obverse-reverse detecting device 5, and this button B1 is automatically rejected by a command out of a control unit and, what is more, a sewing machine is no longer started.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for automatically feeding a button to a sewing machine of a button sewing robot.

[Conventional technology]

Automatic button supply associated with conventional button-setting robots
The mechanism of the feeding device (button loader) is mostly based on mechanical control, and there is a possibility of errors in button insertion or removal of defective items from the Seven Vererators, etc. There were various problems when installing it.

FIG. 2 shows an overall perspective view of an example of a conventional button sewing machine 20 of this type.
, a button loader section 21, and a feeder section 22, 20a is a sewing machine needle, and 23 is a button clamp for sewing buttons. Each button on the workpiece is connected to the feeder section 22.
A vibrator 26 that generates vibration electromagnetically using a solenoid or the like causes each button to face up on a spiral guideway 25 disposed around the inner wall of the bowl 24. The materials are sorted and arranged in a line, and are continuously slid down by vibrations in a downwardly inclined flexible pipe-shaped chute 27, and are fed to the loader section 21. The first button of the continuous buttons to the guide track 28 at the lower end position of the chute 27 is stopped by a stopper at one end, and is moved to the sewing machine 20 in synchronization with a predetermined timing by the button individual feeding mechanism 29.
via the pivot arm 30 to the button clamp 23 section. 31 is one for changing the width of the guide path 28 according to the button diameter.

FIG. 3 is an enlarged side view of the loader section 21 in FIG. 2, viewed from the back side of the figure. The button individual feeding mechanism 29 is
The guide lane 2 includes a first gate 32 and a second gate 33.
Buttons B, , B2 , B3 arranged in a row consecutively in 8
The front end of the first button B1 of the first gate 32 is connected to the axis 32
a clockwise in the figure to close it and stop the button from lowering, then move the second gate 33 to the shaft 32.
When the first gate 32 is rotated counterclockwise, the first button B1 is released and the inclined portion 28a is opened. The shaft plate 3 slides down and is at a position slid to the right from the illustrated position above the tip of the swing arm 30 waiting below at a predetermined timing.
4 (34a is its opening/closing lever). Next, the work attachment 35 having a rubber cap at its tip descends to the position shown in the figure and touches the shirt cover plate 34.
It rotates by coming into contact with the upper surface of the button B1 placed above.

On the other hand, a plurality of carrier pins 30a are vertically protruded from the upper surface of the distal end of the swing arm 30 and can be inserted into buttonholes aligned in the correct position when set on the sewing machine 20. When the tip of the carrier pin 30a comes into contact with the lower surface of the button B1 through the center notch opening of the shirt shirt plate 34, the rotational position of the button driven by the rubber cap of the work attachment 35 is such that the button hole is aligned with the carrier pin. Once aligned, the carrier pin is inserted into the buttonhole, the button drops, and the workpiece attachment 35 is lowered further into position.

When this operation is detected and the shirt shirt plate 34 is withdrawn to the illustrated position, the pivoting arm 30 carrying the button is pivoted and guided to the clamp 23 portion of the sewing machine 20 at a predetermined timing. These mechanisms are well known from, for example, Japanese Unexamined Patent Publication No. 54-123356, and detailed explanation thereof will be omitted.

[Problem that the invention seeks to solve]

However, in the conventional example as described above, the feeding from the first gate 32 onwards of the button individual feeding mechanism 29 to the top of the shutter plates 3, 4 is carried out by the lower guide track 2 in FIG.
Since it relies on the single weight drop on the slope of 8a and cannot utilize the weight drop pressure of successive subsequent buttons, it is light and particularly when the button is made of polyethylene material, or when the air humidity is low such as in winter. Due to static electricity, the button may stick to the middle of the running path and not descend to the correct position, resulting in a blank stitching cycle without buttons. In addition, this type of conventional example does not have a means for distinguishing between the front and back of a button and a means for detecting defective buttonholes, so it relies mostly on the operator's visual inspection to eliminate defective buttons. However, there is a problem in that the blank stitching cycle without buttons progresses and subsequent treatment requires a large amount of effort.

The present invention has been made in view of the problems of the prior art as described above, and it eliminates the problem of individual feeding of buttons due to static electricity, etc., and also eliminates the problem of button backing and blank stitching cycles without buttons. The purpose of the present invention is to provide an automatic button feeding device that prevents the occurrence of such problems.

[Means for solving problems]

For this reason, in the present invention, a button front/back detection means is provided in the button path of the button setting table, and when this means detects the back of the button, the detection signal is used to perform the removal operation of the button on the back and the operation of the sewing machine. The above object is achieved by configuring the device to be controlled.

〔Example〕

The present invention will be explained below based on examples. Figure 1 (a
) and (b) are an enlarged cutaway top view (partial cross section) of essential parts of an embodiment of the button set table of the loader section according to the present invention and a side view seen from the right side thereof, which are similar to the conventional example shown in FIG. Third
Components that are the same (equivalent) to those in the figures are indicated by the same (equivalent) numerals, and redundant explanation will be omitted.

The chute 27 is formed by a flexible tightly wound coil spring having a rectangular cross-section tubular shape, and its lower portion is
Unlike the conventional example, there is no need to have an inclination, the opening is connected to the side of the button set table l almost horizontally, and there is no need for a gate means like the conventional example during the chute, and it is directly connected to the feeder section. The connected and continuous buttons constantly exert pressure on the top button of the opening due to their own weight due to the slope part in the middle of the chute, but normally, the button pushing plate 2 abuts the side of the button and prevents it from moving forward. . The button pushing plate 2 is configured to be able to reciprocate in the direction of the arrow according to a predetermined timing, and retreats to the dotted line position to advance the button B1, and further advances to the solid line position, and displays a waiting button at the bottom of the button B1 according to the timing. The distal end portion of the swing arm 30 can be pushed out to the insertion portion 3 into the plurality of carrier pins 30a. A workpiece attachment 35 having a rubber band 35a at its tip and movable in the axial direction and rotatable is disposed in the upper part of the carrier pin insertion part 3.

In addition, a position 4 where the button is indicated by a dotted line is a button front/back detection unit, and a light reflective type button front/back detection device 5 is provided at the top. Detects the front and back sides of. Furthermore, a container 7 for storing defective buttons is disposed at the lower part of the carrier pin insertion portion 3.

The button pushing plate 2 is driven, for example, by a cam of a main shaft (not shown). In addition, the width of the button set table l can be adjusted from side to side according to the diameter size of the button, and the button holder has a surface that aligns the center of the button with the central axis of the tip of the work attachment (carrier pin part). I can do it.

The retracted position of the button pushing plate 2 can also be adjusted depending on the button diameter, and each operating section is driven by the cam or solenoid, and is controlled by a control device mainly composed of a microcomputer, which will be described later.

Further, a carrier pin 30 is provided at the tip of the shirt flap plate 34.
A notch for entry is formed so that only the tip of the bottle enters the buttonhole when the carrier pin 30a is raised.

With the above configuration, the leading buttons to be fed to the sewing machine section can be reliably placed one by one on the carrier pin and fed to the sewing machine without being affected by static electricity or the like.

Next, a description will be given of the removal operation in the case of a defective buttonhole or the back of the button. Figures 4 (1) to (8') show the main parts of the needle drop of the sewing machine on the fixed side (4a) to (El'), respectively.
FIG. 1A is a diagram illustrating each operation sequence, and main parts corresponding to FIG. 1B of this embodiment are shown in FIGS. In addition, FIG. 5 shows each operating element l.
For # to 8#, timing charts of each operation shown in FIGS. 4(1) to (θ') of each of the seven cutout units are shown.

FIG. 6 shows an operation flowchart regarding button hole defects/button back defects, and FIG. 7 shows a conceptual control circuit block diagram using a microcomputer for controlling each of these operations.

In FIG. 4 (1), W is the cloth to which button B is sewn;
S indicates the stitch, and 5a indicates the stitch.

The projection light beam of the button front/back detection device 5 (FIG. 1(b)) is shown.

In addition, the operating elements in FIG. 5 are as follows: 1# is sewing machine button sewing, 2# is opening/closing of button clamp 23, 3# is opening/closing of button pushing plate 2, and 4# is shirt shirt plate 34.
5# indicates the swinging of the rotating arm 30, 6# indicates the vertical movement of the workpiece attachment 35, 7# indicates the vertical movement of the rotating arm 30, and 8# indicates the rotational movement of the workpiece attachment 35.

The details of the operation are clear from each drawing, but will be briefly explained. First, if the buttonhole is defective,
Since the carrier pin 30a at the tip of 0 cannot penetrate,
Button B does not fall, so work attachment 3
5 cannot reach the predetermined lowest end, so this is detected by a microswitch (not shown) or the like. In Fig. 5 and Fig. 6, the main shaft cam No.
, 3, if a defective buttonhole is detected, the button has been scooped up onto the shirt shirt plate 34. No, after the turning arm 30 moves from directly below the button after proceeding to step 4, the shirt flap plate 34 is opened by a command from the control device, and this button with a defective hole is placed in the defective button receiver 7 (first Figure (b)) and is automatically ejected. At this time, sewing machine 20
If the main shaft cam is rotated without starting, a new button will be supplied and empty stitching without a button will be avoided.

Next, when the button is on the back side, the main shaft cam is No. 3, and the detection device 5 (projection light beam 5a) of the button front/back detection unit 4 (FIG. 1(a))
) (Fig. 1(b), Fig. 4(1-b)), it is detected by the difference in the amount of reflection from the reference (model) button Br. In this case as well, in the sixth sewing cycle in which the shirt shirt plate 34 is opened in response to a command from the control device and automatically falls into the defective button receiver 7 at the bottom and is removed, the buttons are already supplied on the button clamp 23. In the next cycle, the button clamp does not have a button, so the control device commands the sewing machine 2 to continue sewing.
By not activating 0 and rotating the main shaft cam to supply a new button, empty stitching without buttons is avoided.

Note that a supplementary explanation will be provided regarding the timing chart in FIG. First, in operation element 1# sewing machine button sewing, the sewing machine 20 is started at time t1, and stopped at time t2 at which sewing starts. starts rotating. That is, a represents the preparation period, b represents the sewing cycle, C represents the sewing stop state (fabric supply, positioning), and then 2
# When opening and closing the button clamp 23, open the button clamp 23 on the sewing machine side with d to release the already sewn button, and close the clamp with e to hold the new button. In opening and closing the 3# button push-out plate 2.

When opening and closing the 4# shutter plate 34, move the plate 2 backward with f to slide the button B1 into the front/back detection part 4 (Fig. 1(a)), and push it out from the detection part 4 to the carrier pin insertion part 3 with g. , h to close the shirt cover plate 34, and press i to open the plate 34 and drop the defective button.

Time t3 indicates the ejection of the button with a defective hole, and time t4 indicates the ejection of the back button. In both cases, a solenoid (not shown) is driven to open and close by a command signal from the control device.

5# In the swinging of the swing arm, the button is transferred to the clamp 23 at j, and returned to the original position at k. 6# Work attachment 35 When moving up and down, work attachment 35 is used to welcome the new button into carrier pin insertion part 3 with a clasp.
If the button is inserted into the pin 30a at time t5, when the button is held between the carrier pin 30a and the button is inserted into the pin 30a, an insertion completion signal is sent, and if this signal does not come before the t2 stop signal at l#, It is discharged as a defective button by the t3 process in 4#. 7# Swivel arm 30
At the top and bottom, remove the carrier pin from the button with n and press 0.
Press the button with the rubber pad 35 of the work attachment 35.
Hold it down with a. Next, when the 8# workpiece attachment 35 rotates, the drive DC motor (not shown) is rotated. P indicates the period during which the carrier pin 30a can be inserted, rotate the button with q to align it with the carrier pin 30a, and stop with r.
At time t6, the rotation is stopped by the t5 signal at 6#.

The control circuit shown in FIG. 7 is mainly composed of a microcomputer, but since these can be easily constructed using known techniques, detailed explanation will be omitted.

According to this embodiment, it is possible to reliably feed individual buttons to the button clamp section of the sewing machine, and to automatically eliminate defective buttons.

In the embodiment described above, a reflection type sensor is used as the button front/back detection means, but it is needless to say that the sensor is not limited to this and may be of other types.

〔Effect of the invention〕

As described above, according to the present invention, when a button set table is supplied with a button facing down, it is detected and automatically removed, and the operation of the sewing machine is controlled to remove the button. Since the structure is configured so that no idle stitching cycle is performed, the burden on the operator can be reduced, and the installation on automatic machines can be more streamlined.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are a cutaway top view of essential parts and a right side view of an embodiment of a button setting table of a loader section according to the present invention, and FIG. 2 is an overall view of an example of a conventional button setting robot. A perspective view, FIG. 3 is an enlarged side view of the loader section in FIG. 2,
Figures 4 (1) to (8') are explanatory diagrams of the operation sequence of this embodiment, Figure 5 is a timing chart of each operation element, Figure 6 is an operation flowchart for button failure, and Figure 7 is a control diagram. FIG. 2 is a conceptual control circuit block diagram of the device. 1...Button set base 2...Button push-out plate 3...Carrier pin insertion part 4...
...Button front and back detection unit 5...Button front and back detection device 20...Sewing machine 21...Button loader 22...Feeder section 23. ... Button clamp 24 ... Bowl 26 ... Vibrator 27 ... Chute 30 ... Swivel arm 30a ... Carrier pin 34 ... ... Shirt plate 35 ... Work attachment B ...
...button application Person Tokyo Heavy Equipment Industry Co., Ltd. No. 7: 72kr7 Br: $eyr,'
DA〉: Chute Figure 5 Figure 6 Procedural amendment (method) % formula % l Display of the case 1985 Patent Wlk, 119597 No. 2, Name of the invention Automatic button feeding device 5, Subject of amendment ``(1) ~ (4) is corrected to r(1)-48)J. 6-2 Correct "(4α) ~ (6'α sword" on page 9, line 11 to "(1α) ~ (8α)". 6-3 r(4a) on page 9, line 12 )~(6'A)J is corrected to r(1b)~(8b).'' 6-4 Correct the codes corresponding to the changes in the operating state in ``Figure 4'' as shown in the attached sheet. that's all

Claims (1)

[Claims] A button loader section having an inclined chute directly connected to a button feeder section, a button setting stand connected to the chute, and a button clamp section of a sewing machine in which the button setting stand is inserted into a button hole and placed thereon. In a button attaching robot equipped with a rotating arm having a plurality of carrier pins at its tips, button front/back detection means is provided in the button path of the button setting table, and when the means detects the back of the button, An automatic button feeding device characterized in that it is provided with a control means for controlling the removal of the back button and the operation of the sewing machine based on a signal.