JPH0819677A - Button sewing machine - Google Patents

Abstract

PURPOSE:To enable to improve efficiency and to save labor of button sewing work by holding a button to be worked next at the holding part of a button loader moved to the button supplying point near by a place of a button to be sewn down during a designated button sewing work. CONSTITUTION:When a button loader starting switch of this button sewing machine is switched on, a button holder 11 is elevated by the extending motion of an elevation cylinder after a designated time is elapsed. By the clockwise rotation of a rotary cylinder, a button loader 1 is moved from a button supplying point to a button sewing point to transfer a button 2 held at a holding part 3 to the button sewing part. The button loader 1 is elevated by the extending motion of the button holder 11 to transfer the button 2 to a point between a pair of pinchers 11A and 11B. Then the button 2 is held from both sides by the pair of pinchers 11A and 11B by closing motion of a cylinder 13 for opening and closing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is mainly applied to various clothing such as men's and women's clothing jackets, front buttons of vests, buttons for inner pockets, pistol pocket buttons of trousers, etc. The present invention relates to a button-attached sewing machine configured to root buttons on a raw material cloth, or to perform root-wrapping and sewn on the material cloth, and more particularly to a device for supplying buttons to a sewing position of the cloth material. .

[Prior Art] Conventionally, as a sewing machine with a button of this type, as disclosed in, for example, Japanese Patent Laid-Open No. 63-279873, the sewing machine is arranged at a position where a button is sewn on a cloth, and the button is clamped. It is known that an operator manually supplies each button to a button holder that is configured to be switchable between a state where the button is held and a state where the pinch is released.

[Problems to be Solved by the Invention] As described above, in the conventional button-attached sewing machine, every time one button is sewn, the operator carries the button with his / her finger to the sewn point and clamps it in the button holder. Since the manual supply method of holding the button is used, the ratio of button supply time to the total work time from button supply to completion of sewing is large. In particular, the button supply time varied depending on the operator's skill level and experience, which was not preferable in terms of button sewing work efficiency.

 Further, when one button is sewn, it is necessary to move and replace the material at the same time as supplying the button, which is an inconvenient task for the operator.

 Furthermore, when pinching the button in the button holder, if the button hole is not pinched so that it exactly matches the certain needle drop position, needle breakage or button damage may occur. However, there is a drawback in that it becomes less efficient because it uses the nerves that are relevant to.

 The present invention has been made in view of the above circumstances, and it is possible to automate the supply of buttons to the button holder to achieve the efficiency and labor saving of the button sewing work, and to improve the safety. An object is to provide a sewing machine with a button capable of doing the above.

[Means for Solving the Problem] A button sewing machine according to the present invention is arranged at a position where a button is sewn on a cloth, and is switchable between a state where the button is clamped and a state where the button is released. A button loader having a button holder and a button holding portion, and the holding portion is configured to be reciprocally driven and movable between the button sewing portion and the button replenishing portion set to the side thereof. When the button loader is at the replenishment point, the button loader is moved forward to transfer the button held in the holding section to the button sewing point, and the button holder for the transfer button is transferred. And a button supply operation control means for automatically performing a series of operations of the backward movement of the button loader to the replenishment point in a set order.

 According to the invention described in claim 2, in the above button sewing machine, the button holding portion of the button loader is composed of a plurality of pins fitted in a plurality of button holes.

[Operation] According to the present invention, the button loader is moved to a button replenishment point on the side of the button sewn point and is stopped when a predetermined button sewn operation is being performed in accordance with the operation of the sewing machine. The button to be sewn next can be held in the holding part of.

 Then, when the sewing of one button is completed, the button loader and the button holder respectively operate to transfer the already held button to the sewing position, and to transfer the transferred button to the button holder. A series of operations of returning the button loader to the above-mentioned replenishing point is automatically controlled, and the operation shifts to the next button sewing operation.

 As a result, the time from the completion of sewing of one button to the start of sewing of the next button can be kept constant and minimized, and the operator's labor for that can be reduced. You can

 According to the second aspect of the present invention, since the button is held in the holding portion of the button loader, the pin is fitted into each of the plurality of button holes, so that the button is always stable and stable. The buttons can be held in a fixed orientation, and the button holes are provided at an almost constant pitch regardless of the change in button size. This allows any size button to be clamped in the button holder with the button hole accurately aligned with the needle drop position.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings.

 FIG. 1 is a perspective view of a main part of a neck-wrapping button sewing machine, and FIG. 2 is an enlarged side view of the main part. In each drawing, 1 is a button loader, and one end thereof has a button holding part 3 As shown in FIGS. 7 (A) and 7 (B), four pins 3A that are respectively fitted into the four button holes 2A of the button 2 are provided so as to project upward, and the other end is L-shaped. The free end of the connecting plate 4 is fixedly connected via a screw 5.

 Reference numeral 6 denotes a pneumatic rotary cylinder. One end of the connecting plate 4 is fixed to the rotary portion of the rotary cylinder 6, and the forward / reverse rotation of the rotary cylinder 6 causes the button loader 1 to swivel in a horizontal plane and the above-mentioned four cylinders. The button holding portion 3 composed of the pin 3A is configured to be reciprocatingly movable between a button sewing position and a button supply position set on the side thereof.

 A rotary cylinder mount 7 is fixed to a movable rod of a button loader raising / lowering cylinder 10 mounted on a sewing machine arm 8 through a bracket 9, and the button holding portion 3 of the button loader 1 is button-stitched. When it is pivotally moved to the landing point, it is raised and lowered through the cylinder 10 to transfer the button 2 to a button holder described later.

 Reference numeral 11 denotes a button holder, which is arranged at a button sewing position directly below the sewing needle 12 which reciprocates up and down at a fixed position through a lifting drive mechanism (not shown) provided in the sewing machine arm 8. . As shown in FIGS. 3 and 4, the button holder 11 is composed of a pair of movable and fixed arc-shaped holding pieces 11A and 11B, and the movable holding piece 11A is connected via a button holder opening / closing cylinder 13. By moving the button 2 close to or away from the fixed holding piece 11B, the button 2 can be switched between a state of holding the button 2 from both sides of its peripheral portion and a state of releasing the holding.

 Reference numeral 29 denotes a button holder rotating cylinder, which is configured such that the extension and contraction of the cylinder 29 allows the button holder 11 to be switched between a rooting sewing position and a neck-wrapping sewing position via the connecting rods 30 and 31.

 A material holder 14 is a material holder which folds the material 15 for sewing the button 2 and inserts it in the middle of the folded material 15 to fix the material 15. The material holder 14 contracts the cylinder 32. It is configured so that it can be switched between a fixed state and a released state with respect to the cloth 15 through the connecting rods 16 and 17 and the shaft 18 by extension.

 Numeral 19 is a button holder arm, which is fixedly supported via an arm joint 20 on a movable table 21 which is synchronously reciprocally moved in a two-dimensional direction orthogonal to each other in a horizontal plane, that is, an XY axis direction. .

 A pair of right and left cloth holder arms 22 and 23 are fixedly supported on the left and right end surfaces of the movable table 21. A material guide 24 is fixedly connected between the pair of left and right material holder arms 22 and 23, and has a through hole 25a below the material guide 24 through which the sewing needle 12 moves vertically. The needle plate 25 is fixed tightly.

The dough 15 is prevented from being slid by coming into contact with the upper surface of the dough 15 obliquely from above and pressing the dough 15 toward the direction (f) away from the needle plate 25 as shown in FIG. .

 Reference numeral 28 denotes an elevating cylinder of the button holder 11, the upper end of which is connected to the button holder arm 19 and the lower end of which is connected to one of the material holder arms 22. It is configured so that it can be driven up and down freely.

 In addition, in the neck-wrapping button sewing machine having the above-mentioned configuration, a series of operations of root-attaching sewing and neck-wrapping sewing for button attachment, and forward movement from the button replenishment location of the button loader 1 to the button sewing location, Program setting to automatically perform a series of operations for supplying buttons, that is, delivery of button 2 to button holder 11 and return movement to the button replenishment location of button loader 1 in the set order. Equipped with a microcomputer unit consisting of a data memory that can access various types of data and a CPU that can access various types of data. A configurable program memory and a data memory that can access various types of data and a CPU. It is equipped with a microcomputer unit, but its configuration is a well-known application. Omitted.

 Next, the operation of the above configuration will be described with reference to the flow chart of FIG. 8 and the timing chart of FIG.

 When the button loader start switch (not shown) is turned on (step S50), first, the material guide solenoid valve (not shown) is turned on (step S51), and the preset time T1 is awaited (step S51). S52), the elevating cylinder 28 extends and the button holder 11 in the holding release position rises as shown in FIG. 3, and the rotary cylinder 6 rotates rightward so that the button loader 1 supplies the button as shown in FIG. The button 2 moves forward from the position to the button sewing position shown in FIG. 3, and the button 2 previously held in the holding portion 3 is transferred to the button sewing position and stopped (step S53).

 Then, after a preset time T2 has elapsed (step S54), the button loader lifting cylinder 10 extends and the button loader 1 moves up as shown in FIG. It is transferred between the pair of holding pieces 11A and 11B (step S55).

 Then, after a preset time T3 has elapsed (step S56), the button holder opening / closing cylinder 13 is actuated in the closing direction to push the button 2 into a pair as shown in FIG. The holding pieces 11A and 11B hold from both sides of the peripheral portion (step S57).

 As described above, when the button 2 is held by the button holder 11 and the preset time T4 elapses (step S58), the button loader lifting cylinder 10 contracts and the button loader 1 moves to the fifth position. It descends as shown in the figure (step S59).

 Next, after a preset time T5 has elapsed (step S60), the rotary cylinder 6 rotates counterclockwise and the button loader 1 moves backward to the button supply position shown in FIG. 1 and stops ( Step S61). At this time, the button 2 is not held in the button holder 3.

 Then, after waiting for a preset time T6 (step S62), the button holder lifting cylinder 28 contracts and the button holder 11 descends while holding the button 2 (step S63). The material guide solenoid valve is turned off (step S64). The amount of lowering of the button holder 11 at this time is set so as to leave an appropriate gap with the upper surface of the cloth guide 24. In other words, it is set so that a gap corresponding to the amount of movement of the movable table 21 in the Y-axis direction and the set number of stitches set at the time of neck wrapping sewing remains.

 By the above steps (S50 to S64), the pre-process of the button sewing work is completed.

 Next, the dough 15 is set in the dough holder 14 by folding it in two, and the cylinder 32 is extended by stepping on a pedal (not shown) so that the dough holder 14 is folded into two on the upper surface of the dough guide 24. The fabric is pressed and fixed, and the fabric presser 26 folds the fabric 15 in two with the extension of the cylinder 27 and presses the upper face of the fabric 15 from above to prevent the fabric 15 from bending.

 In this state, a sewing machine driving foot pedal (not shown) is operated to start the sewing machine operation (step S65), whereby the reciprocating movement of the movable table 21 in the X-axis direction causes the movement of the sewing machine through the rooting thread 40. Perform root sewing with a preset number of stitches.

 When the root stitching is completed, the cylinder holder 29 is operated to switch the button holder 11 to the root-stitching posture, and in this state, the movable table 21 is moved in the X-Y axis direction by the set amount. Then, the neck-wrapping thread 41 is used to carry out root-wrapping with a predetermined number of stitches, and as shown in FIGS. 10 (A) and 10 (B), the button 2 is lifted from the cloth 15 and the cloth is firmly held. The button attachment held at 15 is obtained.

 When the sewing work for one button is completed as described above, the sewing machine operation is stopped, the button holder opening / closing cylinder 13 is operated in the opening direction, and the button 2 sewn on the cloth 15 is pressed. The holding is released from the pair of holding pieces 11A and 11B of the rudder 11 (step S66). Here, after the button 2 sewn on the cloth 15 is taken out from the button holder 11, the pair of gripping pieces 11A and 11B of the button holder 11 are left in the gripping release posture, and the sewing of the next button 2 is started. Position yourself.

 Of the above-mentioned steps, after step S61, the button loader 1 is returned to the button replenishing point shown in FIG. 1, so the operator selects the button 2 to be sewn next to the previous button. 2 can be held in the holding portion 3 of the button loader 1 during rooting and root winding sewing, and when the sewing of the previous button 2 is completed, the button loader 1 is changed from the button supply point to the button sewing point. The button 2 to be sewn next can be supplied to the button holder 11 fully automatically and quickly only by moving the button 2 to.

 In addition, in the above-mentioned embodiment, the present invention is applied to the button-attached sewing machine configured so that the rooting and the root-wrapping can be performed continuously. Play.

 Further, in the above embodiment, the case of sewing the button 2 having the four button holes 2A has been described, but the present invention can be applied to the sewing of a button having two button holes or a shank button. However, when targeting a button having two button holes, the button holding part 3 of the button loader 1 is composed of two pins, and when targeting a shank button, this button is held from the outer periphery. It is necessary to make a configuration that does.

[Effects of the Invention] As described above, according to the present invention, the button to be sewn next can be set while one button is being sewn on the material, and one button can be set next. By activating the button loader when sewing of the buttons is completed, the previously set buttons can be automatically supplied to the button holder without any manual operation. In addition, the time from the end of sewing one button to the start of the next button can be kept constant regardless of operator's skill level or experience in continuous button sewing work. Moreover, it is possible to achieve a significant improvement in work efficiency while keeping it to a minimum.

 Moreover, since the button hole can be accurately aligned with a certain needle drop position and the button can be held by the button holder, problems such as needle breakage, damage to the button itself, and scattering of broken pieces may occur. This makes it possible to perform buttoning work with high safety both on the machine side and for the operator.

 Further, according to the invention of claim 2, it becomes possible to hold the button in the button loader in a stable and constant orientation, and regardless of the outer diameter of the button, It is possible to automatically supply the button hole in a state where it exactly matches the predetermined needle drop position, and it is possible to further improve work efficiency and safety as a whole.

[Brief description of drawings]

 FIG. 1 is a perspective view of an essential part of a sewing machine with buttons according to an embodiment of the present invention, FIG. 2 is an enlarged side view of the essential part, and FIGS. 3 to 6 are operations of a front step of button sewing work. FIG. 7 (A) and FIG. 7 (B) are enlarged perspective views and side views of the button holding portion, FIG. 8 is a flow chart showing the operation, FIG. 9 is a timing chart, and FIG. 10 (A) and 10 (B) are a plan view and a front view of the button attachment completion state. 1 ... Button loader, 2 ... Button, 2A ... Button hole, 3 ... Button holding part, 3A ... Pin, 11 ... Button holder, 11A, 11B ... A pair of holding pieces, 14 ... Dough holder, 15 ... Dough, 21 ... Movable Table, 24 ... Fabric guide.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Uchida 2-3-10, Hotaruikeminami-cho, Toyonaka-shi, Osaka Yamato Sewing Machine Manufacturing Co., Ltd. Toyonaka factory

Claims (3)

[Claims] 1. A button holder, which is arranged at a position where a button is sewn on a cloth, and which is configured to be switchable between a state in which the button is clamped and a state in which the button is released, and a holding portion for the button, A button loader whose holding portion is configured to be reciprocatingly movable over the button sewing location and a button replenishment location set on the side of the button sewn location, and at the stage where the button loader is at the replenishment location, The forward movement of the button loader for transferring the button held in the holding portion to the button sewing location, the transfer button transfer to the button holder, and the backward movement of the button loader to the supply location. A button-attached sewing machine comprising a button supply operation control means for automatically performing a series of operations in a set order. 2. The button sewing machine according to claim 1, wherein the button holding portion of the button loader is composed of a plurality of pins fitted in a plurality of button holes. 3. The button sewing machine according to claim 1, wherein all operations of the button holder and the button loader are automatically performed by electronic control.