JPH06327859A - Sewing machine for root winding type button - Google Patents

Abstract

PURPOSE:To sew either a flat button or a shank button by enabling a chuck for holding a cloth and a button to slide in the horizontal direction orthogonal to a chuck reversing shaft so as to allow the chuck reversing shaft to be slightly eccentric from the center of the chuck. CONSTITUTION:A button sewing machine comprises a sewing needle which is adapted to be dropped into a thread guide hole in a button, and to piercing through a cloth so as to form a single yarn loop seam for sewing the button, a movable table 2 which is movable in X-and Y-axial directions, and a tank 4 pivotally attached to a frame 3 for the table 2, a cloth retaining bobbin plate 5 fixed to the movable table 2, for supporting the close in a bi-folded condition, a chuck 6 pivotally attached to the frame 3, for holding the button against the bobbin plate 5. The chuck 6 is attached to a reversing shaft 12 so as to hold the button in a horizontal posture, a vertical posture or a posture intermediate between the horizontal and the vertical postures. The table 2 is moved in synchronization with the vertical movement of the needle while the chuck is slid and tilted so as to perform root winding for the button.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-ring, root-wrapped button sewing machine capable of sewing flat buttons and shank buttons (including marble buttons).

[0002]

2. Description of the Related Art Since the button holding posture, the positional relationship between the button and the cloth, and the sewing method at the time of button sewing are greatly different between the case of a flat button and the case of a shank button having a sewing protrusion on the back surface, In sewing factories, there are usually two sewing machines, one for flat buttons and one for shank buttons.
There is a problem that the sewing machine has various types, the area occupied by the sewing machine becomes large, and the equipment cost increases.

Therefore, the applicant has developed a general-purpose button sewing machine capable of sewing both a flat button and a shank button, and has already filed an application (see Japanese Patent Laid-Open No. 4-224788).

The general-purpose button sewing machine can be changed to a chuck corresponding to the outer shape of a button to be sewn, and means for changing the chuck posture to horizontal or vertical, and a chuck when the chuck posture is vertical. A means for adjusting the distance between the cloth and the cloth to a button height corresponding to a flat button or a shank button, and means for setting the distance between the chuck and the cloth to a distance suitable for neck wrapping when the chuck is in a vertical posture. It consists of

[0005]

As shown in FIGS. 14 (1) and 14 (2), the above-mentioned general-purpose button-attached sewing machine has the chuck center axis C1 and the chuck center C2 aligned with each other. When the button B is wrapped around the neck, the distance L2 between the flat button B and the cloth F becomes larger than the distance L0 at the time of buttoning and the cloth is pulled when the condition (1) is changed to the condition (2). , Sewing becomes defective. Further, when the shank button is sewn, since the chuck is made vertical and is retracted with respect to the support shaft, if the chuck is made horizontal as it is, the chuck and the needle may collide with each other and be damaged.

The present invention enables the sewing of both flat buttons and shank buttons with a single sewing machine having a single ring root-wrapping button, and in particular, the sewing of shank buttons can be performed without causing defective sewing when the flat buttons are root-wrapped. The purpose is to prevent the chuck from colliding with the needle even if the chuck is accidentally horizontal.

[0007]

In order to achieve the above object, a single-ring, root-wrapped button sewing machine according to the present invention is provided with X, Y.
A movable table that can move in any direction, a tongue that is rotatably supported by the frame of the movable table, and a cloth presser lower plate that is attached to the movable table that cooperates with the tongue to fold and support the fabric in half, A chuck that is attached to a chuck reversing shaft that is rotatably supported by 90 degrees on the frame and that can hold the button in a horizontal, vertical, and intermediate tilted position facing the cloth pressing lower plate, and a memory that stores sewing data. It consists of a device, a central processing unit that outputs a drive command to the drive unit of the moving table in synchronization with the vertical movement of the needle based on the output data of the storage device, and a switch that sets sewing data,
The chuck is made slidable in the horizontal direction orthogonal to its reversing axis, and the chuck reversing axis is slightly eccentric with respect to the center of the chuck, so that the flat button and shank button can be wound. Then, when setting a cloth-wrapping lower plate for root winding, the scooping or fine adjustment can be made possible by allowing the cloth-pressing lower plate to move forward and backward. It is also possible to enable solid sewing of flat buttons by setting a solid presser foot plate for solid sewing. Sewing data corresponding to the set button sewing type can be displayed on the LCD.
When the manual operation is set, the needle drop can be sequentially displayed on the liquid crystal by repeating the switch operation. When the manual operation is set, the needle drop position can be moved by a switch operation, and the data setting based on the moved needle drop position can be changed. The stopper plate and the stopper are fixed to the frame and the chuck mounting member, respectively, and the stopper plate and the stopper can be located at opposite positions when the chuck is in the thread cutting posture in sewing the shank button.

[0008]

[Operation] In the sewing machine with a single ring root winding button configured as described above, the flat button and the shank button can be sewn by changing the posture of the chuck to horizontal or vertical, and the chuck is placed at the needle drop position. It is possible to set the shank button on the chuck by retracting it relative to the chuck, and by slightly eccentric the chuck reversal shaft center with respect to the chuck center, when moving from button attachment to root winding, The space between the cloth and the cloth shrinks, loosening the thread, and it becomes possible to wrap the flat button. Also,
By advancing and retreating the bottom plate of the cloth presser for neck wrapping,
Rake adjustment or fine adjustment is possible, and by setting the cloth presser lower plate for solid sewing, flat sewing of flat buttons is possible. Furthermore, the sewing data corresponding to the type of button sewing that has been set is displayed on the liquid crystal, and the needle entry position is moved by the switch operation when manual operation is set, and the data setting can be changed based on the needle entry position after the movement. Done. Even if the button is accidentally changed to a flat button when sewing the shank button, the stopper contacts the stopper plate, and the chuck does not rotate more than the posture at the time of thread cutting.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a single-ring, root-wrapped button sewing machine according to the present invention will be described with reference to FIGS.

This single-loop root-wrapping button sewing machine drops into a threading hole provided in the button, penetrates the cloth, forms a single-thread chain stitch, and sewes the sewing needle 1 and X. direction,
Moving table 2 that can move in the Y direction, and moving table 2
Tongue 4 rotatably supported by the frame 3 of the cloth, the lower presser foot plate 5 fixed to the moving table 2 supporting the cloth F in half, and the button lowering the lower presser foot plate 5 facing the lower presser foot plate 5. , And a chuck 6 rotatably supported by the frame 3.

The tongue 4 is fixed via an arm 8 to a rotating shaft 7 attached to a frame 3 (only one is shown in FIG. 1, but on both sides), as shown by an arrow. It can be rotated to. When the tongue 4 rotates in the direction of the arrow, the tongue 4 cooperates with the cloth pressing lower plate 5 to fold and support the cloth F. Also, at the tip of the tongue 4,
A notch portion through which the sewing needle 1 penetrates is formed. In addition,
Reference numeral 9 is an air cylinder for rotating the rotary shaft 7.

The cloth presser lower plate 5 includes the one for neck wrapping 5A shown in FIG. 10 and the one for solid stitching 5B shown in FIG. 11, which are movable tables depending on whether the tie wrapping is performed or not. It is selectively fixed to 2 by screws. At that time, a signal for root winding or solid sewing is selected by the switch 10A of the control unit shown in FIG. Further, in the control section shown in FIG. 7, various button attachments such as the flat button and the shank button shown in FIG. 8 are selected by operating the button selection switch 10B, and one of them is arbitrarily read and written in a memory (RAM). ) 27 storage device. At the same time, since the number of stitches of the button sewing and the needle drop position data are also stored in the storage device, 16 kinds of button sewing can be selected regardless of the flat button and the shank button.

That is, by operating the switch of the control unit, the data of the type of button sewing, the number of stitches corresponding to it, and the needle drop position can be stored in the storage device, and various buttons can be sewn.

After the button sewing data is stored in the storage device, the sewing content is shown by the liquid crystal 23C of the operation section shown in FIG. Therefore, it is possible to prevent the selection mistake of the button sewing type. In the manual operation, the moving table 2 can be moved in the XY direction each time the key 23A of the operation unit is turned on, and the needle drop position can be moved. Therefore, the needle drop position, that is, the sewing position can be confirmed without rotating the pulley once by hand or rotating the motor once by depressing the pedal as in the conventional device. After that, the sewing data (pitch) can be changed by operating the key 23B.
At this time, the moving table 2 moves and the liquid crystal 23C
Is displayed in. Further, when the manual operation is set, the needle drop corresponding to the sewing of the set button can be sequentially displayed on the liquid crystal 23C by repeating the operation of the switch 23B.

That is, in this single-ring root-wrapping button-attached sewing machine, the cloth presser lower plate 5 is selected as the root-wrapping material 5A or the solid sewing material 5B, and at the same time, the root-roll sewing or solid material is selected by the switch of the controller. By setting to sewing,
Neck wrapping or solid sewing can be selected. The cloth presser lower plate 5A for root winding is always pulled toward the mounting side by the spring 22 and has a vertical portion 5A 'that faces the tip of the tongue 4 when rotating and advancing. Further, both the cloth presser lower plates are formed with holes through which the sewing needle 1 penetrates. Also,
Reference numeral 11 is a needle plate.

The chuck 6 is located near the turning end of the tip of the tongue 4 and holds the button from both ends. The retaining portion is shaped to fit flat and shank buttons as shown in FIGS. Flat button B
In the case of, when the button is attached, it is held in a horizontal state as shown in FIG. 4 (1), and when it is wrapped around the neck, it is held in a vertical state as shown in FIG. 4 (2). Also, when setting the shank button B'having a sewing protrusion on the back side,
As shown in (2), the sewing protrusion is held horizontally. The sewing order of the flat buttons is button attachment (horizontal posture), thread trimming (horizontal posture), neck winding (vertical posture), thread trimming (tilted posture), and the shank button sewing sequence is
Button attachment (vertical posture), neck winding (vertical posture), thread trimming (tilted posture).

Since the chuck 6 is required to make the posture of the button horizontal or vertical as described above, the chuck reversing shaft 12 which is a supporting shaft thereof is supported by the frame 3 so as to be rotatable by 90 degrees. As shown in FIG. 1, the chuck reversing shaft 12 includes a connecting member 13 and a bifurcated knuckle joint 14.
The chuck reversing cylinder 15 is connected via. Chuck reversing cylinder 15 and chuck reversing shaft 12
The mechanism itself for rotating is a well-known machine for flat buttons, and the chuck reversing cylinder 15 has a rod 15a.
A dual cylinder that can change the degree of extension of 3 in three stages is used. When the rod 15a is maximally extended, the chuck 6, that is, the button is horizontal, and when the rod 15a is maximally retracted, the chuck 6 and the button are vertical. The rod 15a can be stopped in the middle thereof, and in that state, the chuck 6 and the button take an inclined posture, and the operation of the thread trimming knife becomes possible.

That is, in the sewing machine with a single ring root winding button, the rod 15a of the chuck reversing cylinder 15 is used.
The position of the chuck 6 can be changed to the horizontal, vertical and inclined positions according to an instruction from the central processing unit 16 based on a signal from the cylinder sensor 30 that detects the position of the flat button and the shank button can be sewn. .

As shown in FIGS. 1 to 3, a sliding frame 12a is fixed to the end of the chuck reversing shaft 12, and a chuck base 16 is slidably attached to the sliding frame 12a. The relative position is fixed by the set screw 17. Further, a chuck portion 18 is fixed to the chuck base 16, and the chuck 6 is attached to the tip thereof.

The chuck base 16 includes a chuck base 16
A neck winding height dial 19 for sliding the chuck portion 18 in the direction of the surface is attached. This is shown in Figure 4 (2).
It is used when adjusting the distance between the throat plate 11 and the button B at, that is, the height of the neck wrapping when attaching the flat button.
This mechanism itself is known (Japanese Patent Laid-Open No. 3-111809).
No. 1), so the description is omitted. The amount of adjustment is not so large.

By the way, since the shank button has a very long sewing protrusion on the back surface, it is impossible to set even the shank button with a small adjustment amount of the neck-wrap height dial 19. Therefore, the sliding mechanism of the chuck base 16 described above becomes important.
That is, the surfaces of the chuck base 16 and the chuck portion 18 are at right angles to each other, and when the chuck portion 18, that is, the chuck 6 is vertical, the set screw 17 is loosened, and as shown in FIG. As shown, when the chuck base 16 is slid backward, the chuck 6 can be retracted with respect to the needle drop position, and the shank button B ′ can be set on the chuck 6. In addition, the flat button B
The positional relationship between the chuck base 16 and the sliding frame 12a when set to is as shown in FIG. 5 (1).

That is, by holding the chuck 6 slidably with respect to the chuck reversing shaft 12, the shank button B'can be set on the chuck 6, and the chuck 6 has a flat button B and a shank button B '. Can be commonly used for.

Further, as shown in FIG. 1, it is important that the chuck reversing shaft 12 has its axis C1 slightly displaced (about 1 mm) from the chuck center (button core) C2 of the flat button.

FIG. 4 is a side view showing the positional relationship between the flat button B, the needle 1 and the needle plate 11 at the time of sewing the flat button. (1) and (2) are the axis C1 of the chuck reversing shaft 12.
The chuck center C2 is deviated from the present invention, (1) is a button attachment, and (2) is a neck winding. According to these figures, the distance L2 between the flat button B and the needle plate 11 in (2) is the distance from the flat button B to the cloth F at the time of root winding, but in (2),
It is the sum of the distance L3 from the needle plate vertical surface to the axis C1 of the chuck reversing shaft 12 and the distance L4 between the two axes C1 and C2, that is, the distance L2 from the needle plate vertical surface to the chuck center C2. That is, the chuck is the axis C1 of the chuck reversing shaft 12.
When rotating from the button attachment to the neck wrapping by rotating 90 degrees around, the distance L2 to the cloth is increased more than the distance L0 when the button is attached and the cloth is pulled when sewing from the conventional one shown in FIG. In the case of the present invention, the distance L2 to the cloth is shorter than the distance L0 and the yarn is loosened, so that the root winding can be performed neatly. When the shank button B ′ is sewn, the chuck 6 is made vertical and is retracted with respect to the spindle of the chuck 6.

That is, by slightly decentering the axis C1 of the chuck reversing shaft 12 with respect to the chuck center C2, it is possible to wrap the flat button and the shank button.

Reference numeral 20 in FIG. 1 is a rake dial having a rake amount adjusting cam 21 at the bottom. By the way, since the bottom presser foot presser plate 5 shown in FIG. 10 is constantly pulled by the spring 22 as described above, when it is set, it comes into contact with the rake amount adjusting cam 21 and stops. . Then, when the rake dial 20 is turned, the rake amount adjusting cam 21 also rotates, and the cloth pressing lower plate 5 in contact with it moves forward or backward to change the rake amount. When sewing the shank button, set the scale of the rake dial 20 to 0 and change the hand movement to reduce the rake amount to 0.
It can be adjusted in 2mm pitch. In that case, fine adjustment can be performed with the rake dial 20 (0.05 mm pitch).

That is, by operating the scoop dial 20, fine adjustment of the flat button or the shank button is possible.

In FIG. 3, the stopper plate 24 fixed to the frame 3 and the stopper 25 protruding from the chuck base 16 are used to set the chuck 6 to the chuck reversing shaft 12 when the shank button is set, as described above. The safety device is configured to prevent the chuck 6 and the needle 1 from hitting each other and being damaged due to the backward movement. In the sewing of the shank button shown in FIG. 9 (2), both of them are 0.5 to 1 when the chuck 6 is retracted with respect to the chuck reversing shaft 12 to be in the inclined state (when thread cutting).
There is a positional relationship of facing each other with a gap of mm.

That is, in sewing a shank button,
The chuck base 16 is in the retracted state, and when the chuck base 16 is in the position shown by the solid line in FIG. 9 (2), button attachment and root winding are made, and thread cutting is made at the inclined position shown by the alternate long and short dash line.
At this time, the chuck base 16 rotates in the direction of the arrow, and the stopper 25 is stopped with a slight gap from the stopper plate 24. In this state, even if the button selection switch 10B of the control unit shown in FIG. 7 is accidentally changed from the shank button to the flat button, the stopper 25 hits the stopper plate 24,
The chuck base 16 and the chuck 6 do not rotate further, so that the chuck 6 can be prevented from hitting the needle 1. Then, when the stopper 25 hits the stopper plate 24, an alarm can be issued by a signal from the cylinder sensor 30 that detects the position of the rod 15a attached to the chuck reversing cylinder 15.

That is, the chuck base 16 is retracted, and the inexpensive and simple stopper plate 24 and the stopper 25 are opposed to each other with a slight gap therebetween in a state where the chuck base 16 is inclined to the thread cutting position, so that the damage to the components is surely prevented. You can

On the other hand, in sewing the flat button, as shown in FIG.
As shown in (1), the chuck base 16 is not retracted, and the positions of the stopper plate 24 and the stopper 25 at the inclined position shown by the dotted line are displaced. Therefore, the chuck base 1
There is no problem in rotating 6 between the position shown by the solid line at the time of attaching the button, the position shown by the one-dot chain line at the time of root winding, and the inclined position at the time of thread cutting.

The configuration of the single-ring root-wound button-attached sewing machine of the present invention has been described above, but the control of each part is performed by the control device shown by a block circuit in FIG. Note that FIG.
26 in 2 is a central processing unit (CPU), 28 is a read-only memory (ROM), 29 is a pedal switch, 1
Reference numeral 0 is a switch group of the control unit shown in FIG. In the central processing unit 26, a necessary command is given to each drive unit based on the output data of the storage device. For example, based on the sewing data, a drive command is issued to the X motor and Y motor, which are the drive units of the moving table 2, in synchronization with the vertical movement of the sewing needle 1. The control of the sewing machine motor may be performed by the central processing unit 26. The details of each sewing operation in the single-ring, root-wrapped button sewing machine of the present invention are as shown in the flowchart of FIG.

[0033]

Since the present invention is constructed as described above, it has various effects as described below.

That is, since the chuck can be changed to the horizontal, vertical and inclined postures, the flat button and the shank button can be sewn. Since the chuck can slide in the direction orthogonal to the chuck reversal axis, it is possible to set the shank button on the chuck. Since the axis of the chuck reversing shaft is slightly eccentric with respect to the center of the chuck, flat buttons and shank buttons can be wound around without changing the chuck (attachment, etc.). Since the bottom plate of the cloth presser for neck wrapping can be moved forward and backward, rake adjustment or fine adjustment is possible. By setting the bottom plate of the work clamp for the neck wrap, it is possible to sew flat buttons. Sewing data and sewing order corresponding to the type of button sewing that has been set can be displayed on the liquid crystal, and sewing data for the flat button, shank button sewing type, sewing pitch, and number of stitches are stored in the memory. Became possible with one switch. Therefore, it is possible to prevent a mistake in setting the sewing data. Further, when the manual operation is set, the needle drop position can be moved by a switch operation, and the data setting based on the needle drop position after the movement can be changed, so that proper button sewing can be performed. Since the stopper plate and the stopper that are inexpensive and simple are provided, damage to the chuck and the needle can be prevented even if the chuck is accidentally leveled when the shank button is sewn. In summary, since it is possible to sew flat buttons and shank buttons with a single sewing machine with root-wrapping buttons,
Equipment costs will be lower.

[Brief description of drawings]

FIG. 1 is a perspective view of a single-ring, root-wrapped button sewing machine of the present invention.

FIG. 2 is a plan view of the essential parts of the single-ring, root-wrapped button sewing machine of the present invention.

FIG. 3 is a perspective view of an essential part of a single-ring, root-wrapped button sewing machine of the present invention.

FIG. 4 is a side view showing a positional relationship among buttons, needles and a needle plate during flat button sewing, where (1) is a button attached and (2) is a neck wrap.

FIG. 5 is a view showing a button set state in the sewing machine with a single ring root winding button of the present invention, wherein (1) is a flat button set and (2) is a shank button set.

FIG. 6 is a view of an operation unit in the single-ring, root-wrapped button sewing machine of the present invention.

FIG. 7 is a diagram of a control unit in the single-ring, root-wrapped button sewing machine of the present invention.

FIG. 8 is a diagram showing types of button sewing in the single-ring, root-wrapped button sewing machine of the present invention.

FIG. 9 is a side view showing the relationship between the stopper and the stopper in the single-ring, root-wrapped button sewing machine of the present invention, where (1) is for flat button sewing and (2) is for shank button sewing. is there.

FIG. 10 is a perspective view of a bottom cloth presser foot plate.

FIG. 11 is a perspective view of a solid presser foot lower plate.

FIG. 12 is a block circuit diagram for controlling the single-ring, root-wrapped button sewing machine of the present invention.

FIG. 13 is a flowchart showing each sewing operation in the single-ring, root-wrapped button sewing machine of the present invention.

[FIG. 14] Buttons, needles, and the like at the time of conventional flat button sewing
It is a side view which shows the positional relationship of a throat plate, (1) is at the time of a button attachment, (2) is at the time of neck winding.

[Explanation of symbols]

 1 Sewing needle 2 Moving table 3 Frame 4 Tongue 5 Cloth lower plate 6 Chuck 12 Chuck reversing shaft 12a Sliding frame 20 Rake dial 21 Rake amount adjusting cam 22 Liquid crystal 24 Stopper plate 25 Stopper 26 Central processing unit 27 Storage unit 28 Storage unit C1 chuck reversal axis center C2 chuck center

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Kinoshita 8-2, Kokuryo-cho, Chofu-shi, Tokyo 1 Juke Co., Ltd.

Claims (6)

[Claims] 1. A moving table movable in X and Y directions,
A tongue that is rotatably supported by the frame of the moving table, a cloth presser lower plate that is attached to the moving table that cooperates with the tongue to fold and support the cloth, and a frame 9
A chuck that is attached to a chuck reversing shaft that is rotatably supported by 0 degree and that can hold a button in a horizontal, vertical, and intermediate tilted position facing a cloth pressing lower plate, and a storage device that stores sewing data. , A central processing unit that issues a drive command to the drive unit of the moving table in synchronization with the vertical movement of the needle based on the output data of the storage device, and a switch that sets sewing data, and the chuck is horizontally aligned perpendicular to its inversion axis. A single ring root-wrap button sewing machine that is slidable in any direction and that allows the chuck reversal shaft to be slightly eccentric with respect to the center of the chuck, enabling the root winding of flat buttons and shank buttons. 2. A scoop adjustment or fine adjustment is made possible by making the cloth pressing lower plate forward and backward when setting a cloth pressing lower plate for root winding.
A sewing machine with a single ring root winding and a button described in. 3. The single-loop root-wrap button sewing machine according to claim 1, wherein a flat button solid sewing is enabled by setting a cloth presser lower plate for solid sewing. 4. A moving table movable in X and Y directions,
A tongue that is rotatably supported by the frame of the moving table, a cloth presser lower plate that is attached to the moving table that cooperates with the tongue to fold and support the cloth, and a frame 9
A chuck that is attached to a chuck reversing shaft that is rotatably supported by 0 degree and that can hold a button in a horizontal, vertical, and intermediate tilted position facing a cloth pressing lower plate, and a storage device that stores sewing data. , Which consists of a central processing unit that issues a drive command to the drive unit of the moving table in synchronization with the vertical movement of the needle based on the output data of the storage device, and a switch that sets sewing data, corresponding to the set button sewing type. Sewing data is displayed on the liquid crystal, and when it is set to manual operation, the needle drop is sequentially displayed on the liquid crystal by repeated switch operation. 5. A moving table movable in X and Y directions,
A tongue that is rotatably supported by the frame of the moving table, a cloth presser lower plate that is attached to the moving table that cooperates with the tongue to fold and support the cloth, and a frame 9
A chuck that is attached to a chuck reversing shaft that is rotatably supported by 0 degree and that can hold a button in a horizontal, vertical, and intermediate tilted position facing a cloth pressing lower plate, and a storage device that stores sewing data. , A central processing unit that issues a drive command to the drive unit of the moving table in synchronization with the vertical movement of the needle based on the output data of the memory device, and a switch that sets sewing data, and the switch operation when set to manual operation The sewing machine with a single ring root winding button that allows the needle drop position to be moved by the and the data settings can be changed based on the needle drop position after the move. 6. A stopper plate and a stopper are fixed to the frame and the chuck mounting member, respectively, and the stopper plate and the stopper are in opposite positions when the chuck is in the thread cutting posture in sewing the shank button. A single-ring, root-wrapped button sewing machine according to any one of 1.