JP2002078991A - Button-sewing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working efficiency of sewing buttons in a small lot. SOLUTION: There is provided a button-sewing apparatus which allows its change-over switch 12 to switch its mode between a large lot mode in which a large number of buttons are supplied to a tongue pin 2, and a small lot mode in which only a small number of buttons are supplied to the same. When the small lot mode is selected by the change-over switch 12, button sensors BS1 and BS2 which are arranged between a button holder 7 and the tongue pin 2, are controlled so as not to carry out detection of presence/absence of the buttons.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a button supply device for supplying a button to a knob of a button sewing machine, and an automatic button attaching device provided with the device.

[0002]

2. Description of the Related Art As an automatic button attaching apparatus, an apparatus disclosed in Japanese Patent Application Laid-Open No. 3-86189 has been conventionally known. That is, a button feeder having a cylindrical shape for storing a large number of buttons is provided, and the buttons from this feeder are supplied to the knob feet of the button-attached sewing machine by the turning arm via the turning plate.

[0003] However, such an automatic button attaching apparatus stocks many buttons of the same type, so it is convenient to mass-produce the same kind of buttons. In such a case, the type of button must be exchanged each time, so that there is a problem that it is inconvenient for a multi-product small-lot product using various buttons.

[0004] Therefore, there has been known an apparatus capable of supplying various kinds of buttons. That is, apart from the feeder, a substantially rectangular parallelepiped small lot feeder that holds a large variety of small buttons in a line is arranged on the rotating plate, and the button is inserted from one longitudinal end of the small lot feeder. The button is supplied from the other end to the rotating plate.

[0005] When supplying various kinds of buttons, the button feeder for multi-lot is stopped, and the buttons are supplied from the feeder for small lot.

[0006]

However, in the conventional automatic button attaching apparatus, the presence or absence of a button on the supply path between the rotary plate and the knob foot is monitored by a button sensor, and the absence of the button is detected. Then, since the entire device is stopped, when the final button passes through the button sensor, the button sensor determines that the button has disappeared and stops the entire device, so the final button is manually operated. A problem arises that the workability must be poor because it must be supplied to the knob feet.

In the conventional automatic button attaching device, the presence or absence of the button of the knob foot is detected by the button sensor immediately after the power is turned on. However, when the small lot feeder is used, the button is turned on immediately after the power is turned on. Often there are no buttons on the tabs. That is, in the case of multiple lots, the buttons are supplied continuously, so the buttons are set on the knobs when the work is completed and the power is turned off, but in the case of small lots, the buttons are set in units of one lot. When the power is turned off and the power is turned off, the button is not set on the knob because the next lot is not set when the last lot is being sewn. As described above, even though it is known that there is no button on the knob foot immediately after the power is turned on, useless processing of detecting the presence or absence of the button is performed, thereby causing a problem of poor work efficiency.

Further, in the conventional sewing machine with a button, the presence or absence of the button of the knob is not detected by the button sensor when the knob is lowered immediately before sewing. Therefore, the sewing operation is performed in a state where the button is released from the knob. Problem.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a button supply device according to a first aspect of the present invention includes a button holder for holding a plurality of buttons, and a button for the button holder. In a button supply device including a transfer unit that transfers one by one to a knob foot of a button-attached sewing machine and a button sensor that detects the presence or absence of a button on a button transfer path by the transfer unit, a large number of buttons are transferred to the knob foot. Switching means for switching between a multi-lot mode for supplying and a small lot mode for supplying a small number of buttons, and control means for controlling not to detect the presence or absence of a button by the button sensor when the small lot mode is selected. I have.

Then, when the small lot mode is selected by the switching means, control is performed so that the presence or absence of the button by the button sensor on the transfer path is not detected.

[0011] Thus, after the last button is supplied to the knob foot, it is detected that there is no button sensor, and the apparatus does not perform extra operation, thereby improving the efficiency of attaching a small lot of buttons.

Here, the button sensor may be a contact type which is performed by directly contacting a detector with the button, or a non-contact type which is formed by receiving light projected on the button or reflected light thereof by a light receiving element. Expressions are conceivable. The object to be detected does not need to be the button itself, and may be an object that is indirectly detected by, for example, the movement of an object that operates depending on the presence or absence of the button. That is, any method and form may be used as long as the presence or absence of the button can be detected. Further, as the switching means, a push button switch whose contacts are opened and closed only during the operation, a snap switch which keeps the operation part and the contacts in the same state even after the operation is released after the operation is considered. In short, it is only necessary to be able to switch between the multi-lot mode and the small lot mode.

According to a second aspect of the present invention, there is provided a button attaching device, comprising: a button holder for holding a plurality of buttons; a button attaching sewing machine having a knob for holding the buttons; and a button for the button holder being moved to the knob. In a button attaching device having a transfer means for transferring one by one and a button sensor for detecting the presence or absence of a button on the knob foot, a multi-lot mode for supplying a large number of buttons to the knob foot and a small number of buttons are supplied. Switching means for switching between the small lot mode and control means for controlling not to detect the presence or absence of the button by the button sensor immediately after power-on when the small lot mode is selected.

When the small lot mode is selected by the switching means, control is performed so that the presence / absence of a button by the button sensor on the knob foot is not detected immediately after the power is turned on.

[0015] Thus, the button sensor detects that there is no button immediately after the power is turned on, and the apparatus does not perform unnecessary operation, so that the efficiency of attaching a small lot of buttons can be improved.

According to a third aspect of the present invention, there is provided a button attaching device, comprising: a button holder for holding a plurality of buttons; a button attaching sewing machine having a knob foot for holding the buttons; and a button for the button holder being moved to the knob foot. A button attaching device including at least one of a transfer unit that transfers one by one, a button sensor that detects the presence or absence of a button on the knob, and a button sensor that detects the presence or absence of a button on a button transfer path by the transfer unit. A switching means for switching between a multi-lot mode for supplying a large number of buttons to the knob foot and a small-lot mode for supplying a small number of buttons; and a presence / absence of a button by the button sensor in the multi-lot mode and the small-lot mode. And control means for controlling the detection operation to be different.

The switching means can switch between the multi-lot mode and the small lot mode, and the control means controls the detection conditions of the presence / absence of the button by the button sensor differently in the multi-lot mode and the small lot mode. ing.

As a result, unnecessary operations can be omitted when the small lot mode is selected, and the efficiency of attaching a small lot button can be improved.

A sewing machine with a button according to a fourth aspect of the present invention includes a knob for holding the button, and up-down means for moving the knob up and down. The button is held between the knob and the knob by the up-down means. In a button sewing machine that performs a sewing operation after the foot is lowered, a button sensor that detects the presence or absence of a button on the knob foot, and control means that controls detection of the presence or absence of the button by the button sensor when the knob is lowered. It has.

The detection of the presence or absence of the button of the knob foot by the button sensor is performed at the time of descending immediately before sewing.

Thus, even if the button is dropped from the knob foot before sewing, it is possible to reliably detect the button, and the sewing operation is not performed without the button being on the knob foot.

The term "descent" means the whole or a part of the operation from the time when the lowering operation of the knob foot is completed or immediately before the sewing starts to the time when the sewing starts. It suffices if the dropout of the button immediately before can be detected.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an overall configuration of a button attaching device including a button attaching sewing machine will be described with reference to FIGS.

Reference numeral 1 denotes a button sewing machine, which sew a button to a sewing material (not shown). 2 is a knob foot,
Hold the button. The knob 2 can be lowered on the sewing material by the driving means (FIG. 3) and can move along the XY plane. The knob 2 moves along the XY plane with the knob 2 lowered. Then, the sewing needle 1a is sequentially dropped into the hole of the button, whereby the button can be sewn to the sewing material.

Reference numeral 3 denotes a button feeder, which is a multi-lot feeder in which the same type of buttons B are stocked while having a substantially cylindrical shape. Inside the button feeder 3, there is formed a slope 3c that is spirally inclined from the bottom 3a to the upper discharge portion 3b. In the middle of the slope 3c, a discriminating unit 3d for discriminating the front and back of the button is provided.
The discriminating unit 3d passes the button B whose surface faces upward, and drops the other components to the bottom 3a.

Then, the button feeder 3 is vibrated by the button feeder vibrating means (FIG. 3), so that the bottom 3
The button B stocked on a is raised upward on the slope and guided upward, and only the button whose surface is facing upward and selected by the middle determination unit 3d is guided to the discharge unit 3b.

Reference numeral 4 denotes a first rotary feed plate which is formed in a disk shape and is rotatably driven on the supply table 8, and four cutouts 4a for transferring the button B are shifted by 90 degrees around the first rotary feed plate. It is formed. Then, the button B discharged from the discharge portion 3b is transferred to the notch portion 4a at the first transfer position P1, and the first rotary feed plate 4 rotates in the counterclockwise direction (the direction of the arrow I). The button B is transferred to the second transfer position P2 by the notch 4a.

Reference numeral 5 denotes a second rotary feed plate which is formed in a disk shape and is rotatably driven on the supply table 8, and is provided with ten insertion holes 5a around which the button B is transferred.
Since the second rotary feed plate 5 is partially located below the first rotary feed plate 4 and is arranged such that the cutout 4a and the insertion hole 5a coincide with each other at the second transfer position P2, 2 at the transfer position P2, the button B in the notch 4a is inserted into the insertion hole 5a.
It falls and is handed over.

By the way, a holding plate (not shown) is provided below the notch 4a, and the first rotary feed plate 4 and the second rotary feed plate before the first transfer position P1 and before the second transfer position P2 are provided. Until the plate 5 overlaps, the button is slid on the holding plate so that the button does not fall from the notch 4a.

The button B transferred to the insertion hole 5a at the second transfer position P2 is moved to the third transfer position P3 by rotating the second rotary feed plate 5 in the clockwise direction (the arrow J direction). Is transferred.

Reference numeral 6 denotes a swing arm, whose base end swings about a shaft 6a, so that a tip end portion 6b moves between a third transfer position P3 and a pinch position P4 of the button by the knob foot 2. . The distal end portion 6b is located immediately below the insertion hole 5a at the third transfer position P3, and holds the button B from the insertion hole 5a. Then, counterclockwise around the axis 6a (arrow K)
The button B can be supplied to the knob foot 2 by transferring the button B held at the tip 6b to the knob position P4 by rotating the button B to the knob position P4.

Note that a holding plate (not shown) is provided below the insertion hole 5a, and the button is located between the second transfer position P2 and the third transfer position P3.
a) to slide on the holding plate so as not to fall from a.

The delivery of the button from the insertion hole 5a to the tip 6b at the third delivery position is disclosed in
-103281.
That is, the button sliding on the holding plate is
At the third transfer position P3, it is placed on an opening / closing plate provided between the insertion hole 5a and the distal end portion 6b. Thereafter, the rotating member descends while rotating from above the button, contacts the button, and presses the button downward while rotating the button. As a result, the opening / closing plate is slightly slackened so that the lower part of the button abuts on the front end portion 6b. Further, when the button hole is rotated to the position where the button hole is engaged with the protruding pin provided at the distal end portion 6b, the button moves further downward, largely bends the opening / closing plate, and simultaneously passes through the button hole. The delivery pin ends when the protruding pin is fitted.

An on / off plate button sensor BS1 (FIG. 3) for detecting the presence / absence of an open / close button is provided near the open / close plate at the third transfer position P3. In the vicinity, a turning arm button sensor BS2 (FIG. 3) that detects the presence or absence of a button at the tip 6b (detects whether or not the button hole is held so as to fit into the protruding pin of the tip 6b). Is provided. Furthermore, the presence / absence of a button on the knob 2 is detected (knob 2
A button foot sensor BS3 (FIG. 3) is provided.

The transfer means is constituted by the first rotary feed plate 4, the second rotary feed plate 5, the turning arm 6, the rotary member and the like.

Reference numeral 7 denotes a button holder for holding and supplying a small lot of buttons. The button holder 7
It has a substantially rectangular parallelepiped shape, and has a discharge section 7a for discharging a button and an insertion section 7b for inserting a button at both ends in the longitudinal direction, and the discharge section 7a is a straight path from the insertion section 7b,
The buttons Ba in the holder are linearly arranged in a line.
The insertion portion 7b is located above the ejection portion 7a, and the button inserted from the insertion portion 7b falls freely onto the ejection portion 7a by its own weight. Note that the discharge unit 7a is located between the second transfer position P2 and the third transfer position P3, and is positioned above the discharge position P5 where the insertion hole 5a two positions before the third transfer position P3 is located. The button Ba is dropped from the discharge section 7a into the insertion hole 5a of the second rotary feed plate 5, and the third rotary feed plate 5 is rotated in the arrow J direction by the third rotary feed plate 5. Is transferred to the transfer position P3.

In this embodiment, it is assumed that three buttons are sewn to the cuffs of the upper garment of men's and women's clothing, respectively. Button Ba is held.

Next, the control configuration of the present invention will be described with reference to the block diagram of FIG.

Reference numeral 10 denotes a control unit (control means) which stores a ROM for storing a control program and control data, and a RAM for storing data which can be arbitrarily changed by an operator and data which is to be temporarily stored. And a control unit 1 based on programs and data stored in the ROM or RAM.
And a CPU for controlling various electric devices connected to the CPU. The ROM of the control unit 10 of the present invention includes a control program used when the multi-lot mode is selected and a control program used when the small-lot mode is selected. Note that all control configurations described later are electrically connected to the control unit 10, and the control unit 10 outputs, inputs, or inputs / outputs an electrical signal to each control configuration.

The button sensor BS1, the swing arm button sensor BS2, and the knob foot button sensor BS3
Outputs a detection signal to the control unit 10 when there is a button.

Reference numeral 11 denotes a start switch, which is constituted by a push button switch. When pressed, the start switch 11 outputs a start signal to the control unit 10 to trigger the start of sewing in the sewing machine 1 with a button.

Reference numeral 12 denotes a changeover switch (switching means) which is constituted by a snap switch, and can be switched between a multi-lot mode and a small lot mode by switching an operation section.

A lowering sensor 13 detects the lowering position of the knob 2 of the sewing machine 1 with a button, and outputs a detection signal when the knob 2 lowers.
Output to

Numeral 15 denotes various driving means for the button sewing machine, which are necessary for driving the button sewing machine 1. By this driving means, for example, the thumb feet are moved up and down, the thumb feet are opened and closed, and
-It is possible to move the Y-plane, move the needle bar up and down, and drive the looper forming the seam in cooperation with the needle at the lower end of the needle bar, thereby sewing the button to the sewing material. it can.

Reference numeral 16 denotes a button feeder vibrating means which vibrates the button feeder 3. Due to this vibration, the button B in the feeder 3 is ejected from the ejection section 3b as described above.

Reference numerals 17 and 18 denote first and second rotary feed plate rotating means, respectively.
5 are rotated in the directions of arrows I and J shown in FIG. The first rotary feed plate rotating means 17 rotates the first rotary feed plate 4 every 90 degrees, while the second rotary feed plate rotary means 18 rotates the second rotary feed plate 5 every 36 degrees. To rotate.

Reference numeral 19 denotes a swing arm swinging means, which swings the swing arm 6 in the direction of arrow K shown in FIG.

Reference numerals 21, 22, and 23 denote a counter 21 without a button on the open / close plate, a counter 22 without a swing arm button, and a counter 23 without a knob foot button, respectively. Or clear.

Next, the operation of the embodiment of the present invention will be described with reference to the flowcharts of FIGS.

In step S1, the process waits until the power of the apparatus is turned on. If the power is not turned on, step S1 is repeated until the power is turned on. When the power is turned on, the state of the changeover switch 12 is checked in step S2 to determine whether the multi-lot mode is selected or the small-lot mode is selected. If the multi-lot mode is not selected, FIG. The small lot mode shown in is executed. On the other hand, when the multi-lot mode is selected, the process proceeds to step S3, and the multi-lot mode is executed.

In step S3, the presence / absence of a button on the knob foot 2 is detected by the knob foot button sensor B3. If there is no button, the process proceeds to step S4 to increment the count of the knob foot no button counter 23 by +1. Next, in step S5, it is determined whether or not the number of counts is the third time, and in the case of the third time, the process proceeds to step S6 to clear the count of the knob 23 without the knob foot button,
Error processing, for example, stopping the apparatus and displaying an error on a display unit (not shown) (step S
7). On the other hand, if the third time has not been reached, step S8
And the button supply process including the supply of the button to the knob foot 2 is performed. Then, in step S3 again,
The presence or absence of the button of the knob foot 2 is detected. The button supply process is shown in FIG. 5, and will be described later in detail. If it is determined in step S3 that there is a button, the process proceeds to step S9, where the counter 2 without the knob foot button is set.
Clear the count of 3.

In step S10, the process waits until the start switch is turned on. If the switch is not turned on,
Step S10 is repeated until it is turned ON. When the start switch is turned on, the sewing operation is started. First, in step S11, the knob 2 is lowered onto the sewing material.

Next, in step S12, it is determined whether or not the lowering of the knob foot 2 is detected by the lowering sensor 13. If the lowering is not detected, step S12 is repeated until the lowering is detected. The process proceeds to step S13, and similarly to step S3, the presence / absence of the button of the knob foot 2 is detected. If there is no button, the process proceeds to step S14 to perform error processing, for example, stop the device and generate an error. Is displayed on display means (not shown).

As described above, in the present embodiment, the presence or absence of the button of the knob foot is detected after the lowering of the knob foot is confirmed, so that the button release just before sewing can be detected. No empty stitching.

On the other hand, if it is determined in step S13 that there is a button, the process proceeds to step S15, sewing is performed, and the button is sewn to a sewing material. When the sewing is completed, the knob foot is raised in step S16, and a series of sewing operations is completed.

Subsequently, in step S17, a button supply process is performed. Thereafter, in step S18, it is determined that the power supply is turned off. If the power supply is not turned off, the process returns to step S10 and returns to step S1.
Steps S0 to S17 are repeated, and when the power is turned off, the flow ends.

At the time of the above operation when the multi-lot mode is selected, the button feeder 3 is vibrated by the button feeder vibrating means 16.

Next, the button supply processing that has appeared in steps S8 and S17 will be described with reference to FIG.

In step T1, the swivel arm 6 is swung to perform a button supply operation to the knob foot 2.

In step T2, the first rotary feed plate 4
Is rotated 90 degrees (I direction) to supply the button to the second transfer position P2,
The button is supplied onto the opening / closing plate at the third transfer position P3 by rotating the button by a degree (J direction). In step T3, the presence / absence of a button on the opening / closing plate is detected by the button sensor B1 on the opening / closing plate. If there is no button, the process proceeds to step T4, and the count of the buttonless counter 21 on the opening / closing plate is incremented by one. Next, in step T5, the number of counts is 10
It is determined whether it is the first time, and in the case of the tenth time, step T
Then, the process proceeds to 6 to clear the count of the open / close plate upper button-less counter 21 and perform error processing, for example, stop the apparatus and display an error on a display unit (not shown) (step T7). On the other hand, if the tenth time has not been reached, the process returns to the point before step T2, and the second rotary feed plate 5 is rotated again by 36 degrees. At step T3, the presence or absence of a button on the open / close plate is detected. If it is determined in step T3 that there is a button, the process proceeds to step T8 to clear the count of the open / close plate upper button-less counter 21.

Subsequently, a button is set on the tip 6b of the turning arm 6 in step T9. Here, as described above, the rotating member is pressed while rotating above the button on the opening / closing plate to deflect the opening / closing plate and move the button to the distal end portion 6 of the turning arm 6 located below the opening / closing plate.
b. In step T10, the presence or absence of a button at the tip of the swing arm is detected by the swing arm button sensor B2.
The process proceeds to step T11, where the count of the turning arm buttonless counter 22 is incremented by one. Next, step T12
In, it is determined whether the number of counts is the third time,
In the case of the third time, the process shifts to step T13 to clear the count of the counter 22 without the turning arm button, and performs error processing, for example, stops the apparatus and displays the error on the display means (not shown) (step T1).
4). On the other hand, if the third time has not been reached, step T9
Then, the button is set on the swing arm again, and in step T10, the presence or absence of the button of the swing arm is detected. If it is determined in step T10 that there is a button, the process proceeds to step T15 to clear the count of the turning arm buttonless counter 22. Thus, the button supply process is performed.

Next, a flow when the small lot mode is selected will be described with reference to FIG.

In step U1, the operator first supplies a button to the knob foot. In this operation, the operator may directly supply the buttons to the knob feet, or the operator may manually operate the apparatus to supply the buttons from the button holder 7 to the knob feet.

Here, in the case of the small lot mode, the work efficiency can be improved because the presence / absence of the presence or absence of the button of the knob after turning on the power (step S3), which is performed in the multi lot mode, is omitted. Further, the subsequent processing based on the absence of the button on the knob foot, ie, step S7
It is no longer necessary to perform steps S8 to S8, so that work efficiency can be improved.

In step U2, the process waits until the start switch is turned on.
Step U2 is repeated until N is reached. When the start switch is turned on, the sewing operation is started, and first, in step U3, the knob foot 2 is lowered onto the sewing material. Next, in step U4, it is determined whether or not the lowering of the knob foot 2 is detected by the lowering sensor 13. If the lowering is not detected, step U4 is repeated until the lowering is detected. When the descent is detected, the process proceeds to step U5, and the presence or absence of the button of the knob foot 2 is detected by the knob foot button sensor B3. If there is no button, the process proceeds to step U6, in which error processing, for example, stopping the apparatus and displaying an error on a display unit (not shown) is displayed. On the other hand, step U5
If it is determined that there is a button in
7 and sewing is performed, and the button is sewn to the sewing material. When the sewing is completed, the knob foot is raised in step U8, and a series of sewing operations is completed.

Thereafter, in step U9, the swing arm 6 is swung to supply the swing arm 6 to the knob foot 2, and step U10
, The second rotary feed plate 5 is rotated by 36 degrees (J direction)
Then, the button is supplied onto the opening / closing plate at the third transfer position P3.
A button is set on the tip 6b of the.

Here, in the case of the small lot mode, the button sensor BS on the open / close plate which is operated in the multi lot mode described above.
1 (T3) and subsequent processing (T4)
Since T8) is omitted, error processing (T8) is not performed even after the final button has passed over the opening / closing plate, and the work efficiency can be improved. Further, since the button detection (T9) by the turning arm button sensor BS2 and the subsequent processing (T10 to T15) are omitted, the error processing (T8) can be performed even after the last button has passed over the open / close plate. And work efficiency can be improved.

Next, in step U12, the presence or absence of the button of the thumb foot 2 is detected by the thumb foot button sensor B3, and if there is no button, the process proceeds to step U13 to increment the count of the thumb foot no button counter 23 by +1. . Next, in step U14, the number of counts becomes 5
It is determined whether it is the first time, and in the case of the fifth time, step U1
Then, the process goes to 5 to clear the count of the knob 23 without the knob foot button, perform error processing, for example, stop the apparatus and display an error on a display means (not shown) (step U16). On the other hand, if the fifth time has not been reached, the process returns to the point before step U9, steps U9 to U11 are performed, and in step U12, the presence or absence of the button of the knob foot 2 is detected again. Here, if it is determined that there is a button, the process proceeds to step U17 to clear the count of the knob without button 23.

Thereafter, in step U18, it is determined that the power is off. If the power is not turned off, the process returns to the step before step U2, and steps U2 to U17 are repeated again. If the power is turned off,
The process moves to the end of the flow of FIG.

At the time of the above operation when the small lot mode is selected, the vibration of the button feeder vibrating means 16 is stopped.

In this embodiment, when the small lot mode is selected, the vibration of the button feeder 3 by the button feeder vibrating means 16 is stopped. For example, the button holder 7 and the button feeder 3 are connected. The button holder 7 may be vibrated by the vibration of the button feeder 3 by connecting the members with a member and continuing the vibration of the button feeder 3 by the button feeder vibrating means 16. By doing so, the button in the button holder 7 can be smoothly dropped to the discharge port 7a by the vibration.

It goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0073]

According to the first aspect of the present invention, there is provided a button supply device for switching between a multi-lot mode for supplying a large number of buttons and a small-lot mode for supplying a small number of buttons. And control means for controlling not to detect the presence or absence of the button by the button sensor, so that after the last button is supplied to the knob foot, it is detected that the button sensor is not present, and the apparatus becomes unnecessary. It is possible to improve the efficiency of attaching a small lot button without operating.

Further, the button attaching device according to the second aspect of the present invention has a switching means for switching between a multi-lot mode for supplying a large number of buttons and a small-lot mode for supplying a small number of buttons, and power-on when the small-lot mode is selected. Control means for controlling not to detect the presence or absence of a button by the button sensor immediately after, so that the button sensor detects that there is no button immediately after power is turned on, and the device may perform extra operation. Thus, the efficiency of attaching a small lot of buttons can be improved.

Further, the button attaching device according to the third aspect of the present invention provides a switching means for switching between a multi-lot mode for supplying a large number of buttons and a small-lot mode for supplying a small number of buttons, and a multi-lot mode and a small lot mode. And control means for controlling the detection of presence / absence of a button by the button sensor differently, so that unnecessary operations can be omitted when the small lot mode is selected, and the efficiency of attaching the small lot buttons can be improved. it can.

According to a fourth aspect of the present invention, there is provided a button attaching sewing machine comprising: a button sensor for detecting the presence or absence of a button on a knob; and control means for controlling the presence or absence of the button by the button sensor so as to be performed when the knob is lowered. Therefore, even if the button drops off from the knob foot before sewing, it is possible to reliably detect the button, and the sewing operation is not performed without the button being on the knob foot.

[Brief description of the drawings]

FIG. 1 is a plan view of a button attaching device to which the present invention is applied.

FIG. 2 is a front view of a button attaching device to which the present invention is applied.

FIG. 3 is a block diagram of the present invention.

FIG. 4 is a flowchart of the present invention, mainly in a multi-lot mode.

FIG. 5 is a flowchart relating to a button supply process.

FIG. 6 is a flowchart of the present invention, mainly in a small lot mode.

[Explanation of symbols]

1 ············· Button sewing machine 2 ································ Button feeder 4 ············· First rotary feed plate (transfer means) 5 ····················· Rotary feed plate (transfer means) 6 ································· Button holder BS1 ··············································· 旋回 · ······················································· Control unit (control means)

Continued on the front page F term (reference) 3B150 AA23 BA06 BB02 CE03 CE07 CE23 EH01 EH08 EH17 GD26 GE03 GE12 GF02 GF03 LA32 LA45 LA73 LA82 LB01 LB02 MA02 NA31 NA67 NA71 NA80 NB13 NC02 QA06 QA07

Claims (4)

[Claims] 1. A button holder for holding a plurality of buttons, transfer means for transferring the buttons of the button holder to the knob feet of a button-attached sewing machine one by one, and the presence or absence of a button on a button transfer path by the transfer means. A button attaching device having a button sensor for detecting, a switching means for switching between a multi-lot mode for supplying a large number of buttons to the knob foot and a small lot mode for supplying a small number of buttons; Control means for controlling not to detect the presence or absence of a button by a button sensor. A button holder for holding a plurality of buttons; a button sewing machine having a knob foot for holding the buttons; transfer means for transferring the buttons of the button holder to the knob feet one by one; A button attaching device having a button sensor for detecting the presence or absence of a foot button; a switching means for switching between a multi-lot mode for supplying a large number of buttons to the knob foot and a small lot mode for supplying a small number of buttons; A button attaching device comprising: control means for controlling not to detect the presence / absence of a button by the button sensor immediately after power-on when a lot mode is selected. 3. A button holder for holding a plurality of buttons, a button sewing machine having knob feet for holding the buttons, transfer means for transferring the buttons of the button holder to the knob feet one by one, and the knob In a button attachment device including at least one of a button sensor for detecting the presence or absence of a button on a foot and a button sensor for detecting the presence or absence of a button on a button transfer path by the transfer unit, a large number of buttons are provided to the knob foot. Switching means for switching between a multi-lot mode to be supplied and a small-lot mode to supply a small number of buttons; and a control means for controlling the button presence / absence detection operation by the button sensor to be different between the multi-lot mode and the small lot mode. A button attaching device comprising: 4. A knob for holding a button, and an up-and-down means for vertically moving the knob, holding the button on the knob, and performing a sewing operation after the knob is lowered by the up-and-down means. A button sewing machine, comprising: a button sensor for detecting the presence or absence of a button on the knob foot; and control means for controlling detection of the presence or absence of the button by the button sensor when the knob foot is lowered.