JPS5951840B2 - multi-head sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-head sewing machine in which the main shafts of a large number of sewing machines arranged in parallel are interlocked with each other, and stitch skipping operation mechanisms are interlocked with each other.

In conventional multi-head sewing machines, multiple sewing machines are linked to each other, so if problems such as thread tangles or pattern distortion occur on any of the machines,
Stop the operation of all sewing machines to resolve the problem in the sewing machine that caused the problem, return the progress of embroidery (including sewing) on other sewing machines to the point at which the problem occurred, and then restart all sewing machines. Either the machine must be restarted to perform embroidery, or the embroidery product produced by the troublesome machine must be sacrificed to continue embroidery by another machine, which is unfavorable in terms of efficiency.

Therefore, the present invention aims to eliminate the above-mentioned drawbacks.
When a problem occurs in any sewing machine, it is possible to stop only the vertical movement of the needle bar on the sewing machine that has the problem, and to quickly restart the vertical movement of the stopped needle bar. The purpose of this invention is to provide a multi-head sewing machine.

The drawings showing the embodiments of the present application will be described below.

FIG. 1 shows a part of a multi-head sewing machine A.

In this multi-head sewing machine A, 100 is the machine main body, 101
is a sewing machine installed in the machine main body 100, and a large number of sewing machines are arranged at appropriate intervals.

Reference numeral 102 denotes a movable table, on the top of which cloths 103 (leather, sheets,
(It may be paper, etc.) is removably held by the holding frame 104.

This movable table 102 is adapted to be moved in the front-rear direction (direction of arrow a) and the left-right direction (direction of arrow A) according to a preset program.

Each of the sewing machines 101 is constructed as shown in FIGS. 2 to 6.

In this sewing machine 101, numeral 1 denotes an arm that is attached to the machine stand main body 100 and projects above the movable table 102.

A plate 2 is attached above the arm 1, and a bearing 3 is attached to the plate 2.

Reference numeral 4 indicates a bearing provided below, and reference numeral 5 indicates a receiving plate protruding from the arm 1.

6 is the upper and lower bearings・3. 4' shows a guide shaft that is movable up and down.

Next, 7 is a commonly known main shaft, which is connected to an arbitrary drive mechanism such as a motor so that it can be rotated in conjunction with the main shaft 7 of another sewing machine A.

A mechanism for moving the guide shaft 6 up and down by changing the rotational movement of the main shaft 7, that is, a crank mechanism C, includes a rotating plate 8 fixed to the main shaft 7, a pin 9 provided at an eccentric position of the rotating plate,
Further, a crank 10 that performs a crank mechanism in accordance with the rotational movement of the rotary plate 8 and a clasp 12 connected to the lower end thereof.
Therefore, it consists of a connecting piece 11 etc. connected to the guide shaft 6, and is configured so that the guide shaft 6 can be reciprocated up and down by the rotation of the main shaft 7.

Next, this guide shaft 6 has a presser part 13a for the needle bar and a stop part 1.
A presser member 13 having 3b is fixedly attached.

This presser member 13 is fixed to the guide shaft 6 at the stop portion 13b, and its tip enters into the insertion space provided between the abutting portion 26 and the engaging portion 27 of the engaging member 28 provided at the upper part of the needle bar 23. It is shaped so that it can be inserted.

In this embodiment, the upper side of the member denoted by numeral 27 is used as the contact part, and the lower side is used as the engaging part, while the tip of the member denoted by numeral 13 is formed into a bifurcated shape that can be partially cut in the upper and lower parts, so that a part can be formed between them. The same implementation is possible by inserting a member indicated by the reference numeral 27 into the space (even if it is relative).

Next, the operating mechanism B for rotating the guide shaft 6 will be explained.

Reference numeral 17 indicates a rotary solenoid fixed to the upper plays 1 and 2, and by sending an electrical command to this, the rotating shaft 18 rotates and moves the arm 19 in the direction of the arrow 14.
The operation plate 15 is connected via a claw 20 attached to the tip of the arm 19.
The presser foot 13a is rotated to rotate the presser foot 13a to the stitch skipping position, and when the command is no longer received, the presser foot 13a is configured to return to its original state by a spring or the like for one day.

Note that the portion 16 of the operation plate 15 corresponding to the claw 20 is
The rotary solenoid 17 is formed into a forked shape and is driven by a pawl 20 depending on whether or not the rotary solenoid 17 is energized.

A part of the inner periphery of this operating plate 15 is engaged with a notch on one side of the upper part of the guide shaft, and serves as a guide member in the vertical direction of the guide shaft 6, but it also rotates in the rotation direction. It is possible to form.

The rotary solenoid 17 is connected to a control device (not shown) so as to be energized in conjunction with the rotary solenoid 17 of another sewing machine A according to a predetermined program.

34 is a solenoid cover attached to the upper plate 2 as shown in FIGS. 4 to 6, and 35a and 35b are operation plates 1.
This is a stopper that regulates the amount of rotation of 5.

Next, the structure of the needle bar 23 will be explained. Needle bar 23 is bearing 2
1, and are arranged parallel to the guide shaft 6 so as to be vertically movable.

Above this needle bar 23 are the above-mentioned abutting part 26 and the engaging part 2.
7 is fixed, and a needle is attached to the lower part via a stopper 24.

Next, reference numeral 22 is a member with the lower part serving as the presser plates 2 and 5 and the upper part loosely mating with the needle bar to serve as a spring seat 22a. A hole 31 is provided for receiving the piece 29a.

Winding springs 32 and 323 are provided above and below the spring seat 22a of the member 22, respectively, and are inserted into the guide shaft 6, respectively.

Furthermore, the member 22 is 1. The side end of the receiving plate 5 is supported by a valley groove guide 5a so that it can move vertically freely, and when the part 2'6 and the needle bar 23 descend, the coiled springs 32 and 321 are compressed and the member 22 descends. Yo Nisa: It is.

Note that 33 indicates a commonly known thread swinging guide.

Next, the vertical movement of the needle bar 23 is controlled by the rotary solenoid 1'1.
A forced stop device for stopping the motor 7 regardless of whether or not it is energized will be explained.

36 is the side plate 3 of the solenoid cover 34 of the operating mechanism B.
A guide hole 37 in the axial direction is formed through the bolt screwed onto the bolt 4a.

The guide hole 37 is formed with a small diameter hole 37b on the head side and a large diameter hole 37C on the threaded portion side with the step portion 37a as a boundary.

The above bolt 36 connects the solenoid cover 34 and the upper plate 2.
, arm 1, etc. constitute the frame of the present application.

Reference numeral 38 denotes an operating rod which is formed with a small diameter part 38b on one side and a large diameter part 38C on the other side with the stepped part 38a as a boundary, and the small diameter part 38b and the large diameter part 38C are connected to the small diameter hole 37bζ large diameter hole 3.
7 (41: Fitted so that it can move forward and backward in the longitudinal direction.

The tip of the large diameter portion 38C of the operating rod 38 is positioned to face the side surface of the arm 19 of the operating mechanism B, and by moving the operating rod 38 back and forth in the longitudinal direction, the arm 19 is forcibly rotated in the direction of the arrow 14. The presser foot 13a can be rotated to the stitch skipping position by moving the presser foot 13a.

Reference numeral 39 is a knob screwed onto the tip of the small diameter portion 38b of the operating rod 38.

A position holding mechanism 40 is provided between the operating rod 38 and the bolt 36 for fixing the operating rod 38 in the position when the pressing portion 13a is rotated to the stitch skipping position.

In this position holding mechanism 40, reference numeral 41 denotes a stop pin provided on the knob 39 so as to protrude toward the end face of the head of the bolt 36. When this pin is in contact with the bolt 36, the operating rod 38 moves the presser portion 13a to the skipped position. It is configured so that it cannot be rotated.

Reference numeral 42 denotes a pin fitting hole formed in the end face of the head of the bolt 36, and is formed so that the stop pin 41 can be fitted therein by rotation of the knob 39.

A spring 43 is compressed and sealed between the stepped portion 37a of the gilt 36 and the stepped portion 38a of the operating rod 38, and when the stop pin 41 is fitted into the pin fitting hole 42, the arm 19 is rotated in the direction of the arrow 14. It is set to a strength that can be used.

A case will be described in which a predetermined pattern is embroidered onto each cloth 103 using the multi-head sewing machine A having the above configuration.

. First, before starting the operation of multi-head sewing machine A, each sewing machine 101
The forced stop mechanism is set in the inoperative state as shown in FIGS. 4 and 6, that is, the stop pin 41 is in contact with the head end surface of the bolt 36.

When multi-head sewing machine A is operated in this state, each sewing machine has 10
1's main shaft 7 is rotated in conjunction with each sewing machine 101.
The operating mechanisms B are operated in conjunction according to a predetermined program, and the movable table 102 is also moved according to a predetermined program.

Therefore, in each sewing machine 101, when the main shaft 7 rotates in the state shown in FIG. 2, the guide shaft 6 connected to the crank mechanism C moves up and down.

Due to this vertical movement, the presser member 13 and the needle bar 23 pressed by the presser member 13 are both moved vertically to perform embroidery.

Note that when the needle bar 23 and the member 22 are raised, the spring 32,
32a tends to be lifted by the restoring force, but in this embodiment, as the holding member 13 rises, the joining part 27
The needle bar 23 is lifted up via the .

(In this case, the spring force may be very weak.) If you want to skip stitches while embroidery continues in this way, you can send an arbitrary command (for example, a command using a well-known card) to the rotary solenoid 17. operates to rotate the guide shaft 6 via the operation plate 15, and due to this rotation, the presser member 23 that is in the insertion space of the engaging member 28 is moved.
moves horizontally to a position away from above the portion 26, as shown in FIG. 3, and then moves up and down.

In this case, as is clear from FIG. 3, since the needle bar 23 remains raised, skipping stitches is practically possible.

If you want to embroider again next time, please issue a command to the rotary solenoid 17 in the state shown in Figure 2.
The operation plate 15 (generally based on a card command) and the guide shaft 6 move back to the original direction.

In this case, the presser member 13 in the position as shown in FIG. 3 enters the push-in space below the engaging portion 27 as shown in FIG. 2, and embroidery is continued as described above.

Next, if a problem such as thread entanglement or pattern distortion occurs in any sewing machine 101 while embroidering on each sewing machine 101 as described above, the forced stop device of the sewing machine 101 that has caused the problem Rino knob 3
9 to align the stop pin 41 with the pin fitting hole 42.

As a result, the operating rod 38 is moved forward by the spring force of the spring 43, causing the arm 19 to rotate as shown in FIG.
Maintain this state.

As a result, the presser part 13a of the guide shaft 6 is rotated and fixed at the skipped stitch position where it cannot engage with the contact part 36 of the needle bar 23, and the vertical movement of the needle bar 23 is stopped, causing the problem to continue. will also be suspended.

Next, the worker removes the cause of the trouble, completely eliminates the trouble, returns the thread to the point of the embroidery pattern where the trouble occurred, and makes it possible to restart from this point.

On the other hand, the other sewing machines 101 that do not cause any trouble continue embroidering and complete the embroidery work on the winter crop 103, and then these machines 101 start embroidering the next fabric 1.
Started embroidery work on 03.

Then, when the embroidery on these sewing machines 101 is completed up to the point of the pattern at the time when the trouble occurred on the sewing machine 101 where the trouble occurred, the sewing machine 101 where the trouble occurred
Pull the knob 39 quickly to remove the stop pin 41 from the pin fitting hole 42, and then turn the knob 39 slightly to bring it into the state shown in FIGS. 4 and 6.

As a result, the operating mechanism B of the sewing machine 101 where the trouble occurred is linked with that of the other sewing machines 101 in a timely manner, embroidery on the sewing machine 101 where the trouble has occurred is restarted in a timely manner, and the embroidery on the subsequent sewing machine 101 is linked. It will be done.

Therefore, the embroidery pattern in which the trouble has occurred can be completed without leaving any traces of the trouble.

In the above embodiment, a spring is used as the position holding mechanism, but the mechanism is not limited to this.A pin protruding from the operating rod is engaged with a guide groove provided in the frame to hold the operating rod. may be fixed in position.

Furthermore, the mounting position of the operating rod on the frame is not limited to that shown in the drawings.

As described above, in this invention, the main shafts of a large number of sewing machines are configured to interlock with each other, and the operating mechanisms of each sewing machine are configured to interlock with each other according to a predetermined program. When operating embroidery machines to embroider cloth, etc., the same pattern can be embroidered on each piece of cloth at the same time on multiple sewing machines, and the same pattern can be embroidered efficiently. If you want to skip stitches at the same time due to convenience, you can operate the operating mechanism of each sewing machine to skip the same number of embroidery stitches on each machine at the same time, making it convenient to efficiently embroidery beautiful patterns with skipped stitches. There is sex.

On the other hand, in the present invention, even if the main shafts and operating mechanisms of a large number of sewing machines are configured to interlock with each other as described above, the vertical movement of the needle bar in each sewing machine can be controlled. Since the operation rod 38 can be used to stop each sewing machine individually, if a problem occurs in one of the sewing machines when all the sewing machines are linked together for embroidery, the problem will occur. The operation rod 38 of the sewing machine is restrained from reciprocating rotation of the arm 19 in the operation mechanism for skipping stitches, and the presser foot 1 of the sewing machine is
The needle bar 23 has the advantage of being able to stop the vertical movement of the needle bar 23 by restraining the needle 3a at the skipped stitch position.

This has the advantage that the above-mentioned trouble can be solved while the sewing machine is stopped, and after the problem is solved, the restraint of the arm 19 by the operation rod 38 can be released and the embroidery work can be resumed.

In this case, of course, all other sewing machines other than the one involved in the above trouble can continue to perform embroidery, and the operating rate of the entire multi-head sewing machine can be increased.

Furthermore, even if the present invention is designed to stop the vertical movement of the needle bar in a particular sewing machine while all the sewing machines are in operation as described above, it is possible to stop the vertical movement of each needle bar. The structure is such that an operation rod 38 is added to the operation mechanism B for stitch skipping provided in each sewing machine, respectively.
It has an extremely simple structure in which the arm 19 of the operation mechanism B for stitch skipping is only restrained by the operation rod 38, and has the advantage of being able to stop one particular sewing machine.

Firstly, this is economical as the equipment costs associated with the above-mentioned additional configuration can be extremely low, and secondly, the occurrence of breakdowns is extremely low, and the operation to stop only one specific sewing machine is possible. It is highly reliable and effective.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a perspective view showing a part of a multi-head sewing machine, FIG. 2 is a partially cutaway perspective view showing the sewing machine with a part omitted, and FIG. FIG. 4 is an enlarged plan view of the main part showing the operating state shown in FIG. 4, FIG. 5 is an enlarged plan view of the main part showing the operating state of FIG. Sectional view taken along the vI-VI line in Fig. 4, 'A...Multi-head sewing machine, 6...Guide shaft, C...Crank mechanism, 7...Main shaft ,
13a... Presser foot, 21... Needle bar, 2
6... Department, B... Operation mechanism, 36.
... Bolt (frame), 38 ... Operation rod, 40 ... Position holding mechanism.

Claims (1)

[Claims] 1 A guide shaft is provided on the frame so that it can freely move up and down and rotate, and this guide shaft is connected to the main shaft via a crank mechanism, and the guide shaft is configured to move up and down by the rotation of this main shaft, and the guide shaft is integrally provided with a presser foot that projects laterally, and a needle bar is installed in parallel with the guide shaft so that it can move vertically. A contact portion is integrally provided so that the needle bar is lowered through the presser foot and the presser foot when the guide bar is lowered, and the presser foot is connected to the frame. A sewing machine is provided with an operating mechanism configured to rotate the part to a position where the part can be engaged with the part and a position where it cannot be engaged with the part, respectively,
Moreover, in a multi-head sewing machine in which a large number of such sewing machines are installed in parallel, and the main shafts of each sewing machine are interlocked with each other, and the operating mechanisms are interlocked with each other according to a predetermined program, each of the sewing machines 1. The operation mechanism of the thinner is a rotary toremaid and a rotary solenoid that transmits the reciprocating rotation to the guide rod, and reciprocates the presser part to the engageable position and the skipped stitch position via the guide rod. Each of the sewing machines is equipped with an arm that can freely rotate in a reciprocating manner, and each of the sewing machines has an operating rod that can freely move forward and backward in the longitudinal direction on the frame of each of the sewing machines. The movement of the arm can be restrained and released, and the position where the operation rod restrains the arm is such that the presser part is located at the skipped stitch position. position, and further between the operating rod and frame of each of the above sewing machines,
A multi-head sewing machine comprising a position holding mechanism for fixing the operating rod at a position where the arm is restrained.