JPH0754258A - Multi-head embroidery sewing machine - Google Patents

Abstract

PURPOSE:To obtain a multi-head embroidery sewing machine capable of accurately embroidering on cloth, in the case of arranging the same patterns laterally and longitudinally, shortening the time required for the operation. CONSTITUTION:Cloth is moved longitudinally and right and left in a retained state in a holding frame and plural embroidery sewing machines for embroidering on the cloth are arranged side by side. Each embroidery sewing machine is equipped with two needles vertically movable mutually in an integrated way in a direction crossing the arrangement direction of the sewing machines. Consequently, plural patterns are embroidered on the cloth in the arrangement direction of the embroidery sewing machines and simultaneously the same patterns are arranged in the direction crossing the arrangement direction and embroidered on the cloth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-head embroidery sewing machine capable of simultaneously embroidering a plurality of same patterns on a wide cloth by a plurality of embroidery sewing machines.

[0002]

2. Description of the Related Art A multi-head embroidery sewing machine of this type includes a cloth holding frame which is moved back and forth and left and right by a drive device.
A plurality of juxtaposed embroidery sewing machines adapted to embroider each of the cloths held by the cloth holding frame, and each of the embroidery sewing machines is capable of descending and ascending from the needle drop position. A needle and a hook of the plurality of embroidery sewing machines, by moving the cloth holding frame holding the cloth to the front, rear, left and right. Each cloth is embroidered (see, for example, Japanese Patent Publication No. 3-1429).

In such a multi-head embroidery sewing machine, since the cloth is mechanically moved while being stretched and held by the cloth holding frame, the movement of the cloth is accurate, while the plurality of needles have their respective predetermined needle drops. Since the vertical movement is repeated toward the position, a plurality of accurate patterns can be efficiently embroidered simultaneously on the cloth with a plurality of needles in a state where the patterns are arranged side by side on a wide cloth.

[0004]

However, in the above-mentioned conventional multi-head embroidery sewing machine, the number of patterns that can be embroidered at one time is equal to the number of heads of the embroidery sewing machine. Therefore, the same pattern can be arranged not only horizontally but also vertically. When embroidering, there was a problem that it took a long time for the total number of vertically arranged patterns.

The present invention has been made in order to solve the above-mentioned problems (technical problems) of the prior art. It is possible to accurately embroider a cloth, and the same pattern is arranged horizontally and vertically. In this case, the object is to provide a multi-head embroidery sewing machine that can reduce the time required for the work to half.

[0006]

In order to achieve the above object, the multi-head embroidery sewing machine according to the present invention is held by a cloth holding frame which is moved in the front-rear and left-right directions by a driving device and the cloth holding frame. A plurality of embroidery sewing machines arranged side by side so that each cloth is embroidered. Each of the above-mentioned embroidery sewing machines has a needle that can be freely lowered to and raised from a needle drop position, and the needle drop position. The cloth held by the cloth holding frame is embroidered by the needles of the plurality of embroidery sewing machines and the hook by moving the cloth holding frame back and forth and left and right. In the multi-head embroidery sewing machine, the needles of the embroidery sewing machines are arranged so that two needles that move up and down integrally with each other are arranged side by side in a direction intersecting the direction in which the embroidery sewing machine is arranged. Is above A plurality of patterns are arranged below the respective needle drop positions corresponding to the needles, and a plurality of patterns are embroidered on the cloth in the juxtaposed direction of the embroidery sewing machine, and at the same time, the same pattern is arranged in the juxtaposed direction. The embroidery can be arranged side by side in the intersecting direction.

[0007]

The cloth holding frame is moved back and forth and left and right, and the front and rear needles of each of the plurality of embroidery sewing machines repeatedly move up and down toward the predetermined needle drop positions, so that the cloth held by the cloth holding frame is changed. On the other hand, a large number of patterns arranged in the direction in which the embroidery sewing machines are arranged are embroidered in two rows.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a multi-head embroidery sewing machine. Reference numeral 2 denotes a base frame, which is exemplified by a table 2a and a head mounting frame 2b fixed to the table 2a. 3 and 3 are plural sewing machine heads attached to the frame 2b, and 4 is embroidered cloth 5
A cloth holding frame for holding a, as is commonly known,
The tightly stretched embroidered cloth 5 is sandwiched from above and below so that it can be maintained and loosened, and by a well-known drive device provided in the table 2a Further, for example, the table 2a is moved on the upper surface in the horizontal direction (also referred to as the left-right direction) indicated by the arrow X and in the vertical direction (also referred to as the front-back direction) indicated by the arrow Y. 6 is a supply device for the embroidered cloth 5. As the embroidered cloth 5, for example, sheet-shaped cotton 5 for quilting is used.
A support frame is used to supply materials such as a, the surface material 5b, and the lining material 5c in a polymerized state, and a supporting frame adapted to support a roll of those materials is illustrated. Reference numeral 7 is a winding device for a finished product, which is a device for winding the finished product 8 into a roll.

Next, FIGS. 2 to 4 showing the essential parts of the multi-head embroidery sewing machine having the above construction will be described. 11 indicates a bed,
A plurality of heads 3 are arranged in parallel to each other. Reference numeral 12 is a gear box provided between adjacent beds 11. next
Reference numeral 14 denotes an embroidery sewing machine configured to embroider the cloth held by the cloth holding frame 4 and, in this example, one bed 11
And two sets of embroidery sewing machines corresponding to one head 3
14 is provided and 26 is provided in the multi-head embroidery sewing machine 1 of FIG.
A set of embroidery sewing machines are arranged side by side. At least two embroidery sewing machines 14 may be installed side by side. Each embroidery sewing machine 14 will be described below. 15 is a needle plate, as shown in FIG.
F and 15R are provided at the front and rear needle drop positions and are attached to the bed 11. Reference numerals 16F and 16R denote front and rear hooks provided below each of them corresponding to the needle drop positions, and are attached to hook shafts that are rotatably provided with respect to the bed 11. Reference numeral 18 denotes a drive mechanism for rotationally driving the shuttle. Next, 20F, 20R
Is a front and rear needle bar which is vertically movable on the head 3 above the front and rear needle holes 15F and 15R.
R is a needle arranged in a direction crossing the juxtaposed direction of the embroidery sewing machine 14, for example, in a front-back direction orthogonal to the juxtaposed direction,
The needle bars 20F and 20R are attached to the lower ends of the needle bars 20F and 20R so that the needle bars 20F and 20R can be lowered and raised from the respective needle drop positions. 22F and 22R are connecting portions with the needle bar driving section in the lifting mechanism provided on the upper portions of the needle bars 20F and 20R. Reference numeral 23 denotes a needle bar elevating mechanism for vertically moving the front and rear needles 21F and 21R integrally. 24F and 24R are the front and rear needles 21F and 21
With the front and rear balances provided corresponding to R, each base 24 '
Is pivotally supported in the head 3 and can move up and down in the direction of the arrow in FIG. Reference numeral 25 indicates a balance driving mechanism for driving the front and rear balances.

Next, the shuttle drive mechanism 18 will be described.
27 is a shuttle drive shaft, and one end is horizontally installed in the table 2a via a connecting gear (for example, a spiral gear) 28.
It is connected to 29. 30 is an intermediate shaft prepared for the bed 11,
It is connected to the shuttle drive shaft 27 via a connecting gear (for example, a spiral gear) 31 arranged in the gear box 12.
Reference numerals 32, 33F and 33R are pulleys attached to the intermediate shaft 30 and the front and rear hook shafts, and hook driving belts (for example, timing belts) 34 are stretched over them so that the hooks 16F and 16R can be rotationally driven. There is. The driving of each shuttle may be a configuration in which each shuttle shaft is rotationally driven by a gear from the intermediate shaft 30.

Next, the needle bar elevating mechanism 23 will be described. 36
Is a needle bar drive shaft, one end of which is connected via a connecting gear (for example, a spiral gear) 37 to a needle bar main shaft 38 laterally provided in the frame 2b. Reference numerals 39 to 45 denote known members for converting the rotational movement of the needle bar drive shaft 36 into vertical movements to move the needle bars 20F, 20R up and down, and 39 denotes an eccentric cam attached to the other end of the drive shaft 36, 40 is a crank rod, 41 is a vertically movable lever, 42 and 42 are elevating rods parallel to the needle bars 20F and 20R, 43,
43 is a needle bar drive unit provided for each lifting rod, and 44 and 45 are levers 41.
A link and a transmission piece for transmitting the vertical movement of the to the respective hoisting rods 42 are shown. In such a structure, when the needle bar drive shaft 36 rotates in the direction of the arrow, the lever 41 moves up and down, and the lifting rod 42 also moves up and down. The movement is the drive unit 43
From the needle bars 20F, 20 through the connecting portions 22F, 22R of the respective needle bars.
When transmitted to R, the needles 21F and 21R move up and down integrally.
Numeral 46 indicates each needle bar 20 despite the operation of the needle bar lifting mechanism 23.
A well-known skipping operation mechanism for temporarily stopping the operation of the F and 20R (see, for example, JP-A-51-9947).
Indicates.

Next, the balance driving mechanism 25 will be described. 48
Is a balance drive shaft, one end of which is connected to a balance main shaft 50 provided in the frame 2b through a connecting gear (for example, a spiral gear) 49. Reference numeral 51 denotes a balance driving cam attached to the other end of the drive shaft 48, which is a groove cam. 52
Is a balance drive lever attached to the base portion 24 'of the balance, the free end of which is positioned so as to be driven by the cam groove of the cam 51.

The hook main shaft 29, the needle bar main shaft 38, and the balance main shaft 50 are connected to a drive motor provided in the table 2a so as to rotate in synchronization with each other. By rotating the shaft, the needle bar and the balance are moved up and down once each while the shuttles 16F and 16R rotate twice in the direction of the arrow.

The front and rear needles 21 in each of the above embroidery sewing machines 14
The distance between F and 21R is set to, for example, 75 mm so that embroidery can be performed at the same time within the cloth holding frame 4 (the size in the front-back direction is, for example, 50 cm). The front and rear needles 21 of each of the above embroidery sewing machines 14 so that a large number of patterns can be arranged at equal intervals.
The distance between F and 21R is the same.

In the above construction, the cloth 5 is held by the cloth holding frame 4 for four rounds and moved in the horizontal direction X and the vertical direction Y according to a predetermined program. Further, the front and rear needles 21F and 21R of each embroidery sewing machine 4 move up and down and the hook 16
The F and 16R rotate to embroider the cloth 5. As shown in FIG. 5, the state is indicated by reference numerals 55F1, 56F1, 57F1 ... by the front needle 21F of the plurality of embroidery sewing machines 14.
The direction in which a plurality of patterns indicated by 55R1, 56R1, 57R1 ... With the needle 21R on the rear side intersects the juxtaposed direction of the embroidery sewing machine 14 at the same time that a plurality of patterns indicated by Embroidered side by side. When the embroidery of these patterns is completed, the cloth 5 is moved by a distance of twice the distance between the front and rear needles 21F and 21R of the embroidery sewing machine 14 by the movement of the cloth holding frame 4 in the direction of the arrow 61, and the same as above. Embroidery is performed, and the needles 21F on the front side are used to code 55F2, 56F2, 57F.
At the same time as the pattern shown by 2 is embroidered, the needle on the rear side
21R embroiders the patterns 55R2, 56R2, 57R2 ...

Next, a case where the multi-head embroidery sewing machine performs embroidery in a lattice pattern as shown in FIG. 6 will be described.
In one embroidery sewing machine 14, first, as shown in (A), the front needle 21F is not operated by the operation of the stitch skipping operation mechanism 46, and the rear needle 21R is vertically moved and the cloth is held. A combined movement of the frame 4 in the X direction and the Y direction is performed, and embroidery of the portion indicated by reference symbol R1 is performed. In this case, since the front needle 21F does not perform the embroidery operation as described above,
The embroidery of the portion indicated by reference numeral F1 is not performed. Next, the stitch skipping operation mechanism 46 of the front needle 21F is released, the front needle 21F and the rear needle 21R are actuated in synchronization, and the reference symbol F
Embroidery of the portions indicated by 2 and R2 is performed respectively. Further, the embroidery of the portions indicated by F3 and R3 and the embroidery of the portions indicated by F4 and R4 are continuously performed. The code F
When the embroidery of the parts indicated by 4, R4 is completed, the needles 21F, 21R
The operation of the spindles 29, 38, 50 is stopped with the state of dropping the cloth, and then the cloth holding frame 4 is loosened, and only the frame 4 is moved in the direction of arrow 73 as shown in (B), and the cloth 5 is there. Hold again. Then, the sewing machine is restarted from that state, and as shown in (C), the embroidery of F5, R5, F6,
Continue to embroider the part R6. The embroidery in another embroidery sewing machine is performed in the same manner as the operation of the embroidery sewing machine. Embroidery by the above operation is performed one after another, and the long quilt product 8 is completed.

[0017]

As described above, according to the present invention, the cloth 5
When embroidering on the cloth, the cloth 5 is mechanically moved while being held by the cloth holding frame 4, so that the movement is accurate, while the needles 21F and 21R of the plurality of embroidery sewing machines 14 respectively have predetermined needle drops. Since the vertical movement is repeated toward the position, accurate patterns can be simultaneously and efficiently embroidered on the cloth 5 by the plurality of needles 21F, 21R of the embroidery sewing machine 14, respectively.

Moreover, in the above case, each embroidery sewing machine 14 has two needles arranged in a direction intersecting with the embroidery sewing machine.
Since 21F and 21R are provided, a plurality of patterns arranged in the juxtaposed direction of the embroidery sewing machine are designated as 55F1, 56F1, 57F1 and 55R in FIG.
As shown by 1,56R1 and 57R1, it has the feature that it can embroider at the same time in two rows in front and back. This has the advantage that, when a plurality of the same patterns are arranged side by side on a wide cloth not only horizontally but also vertically, the time required for the work can be halved compared to that of the prior art.

[Brief description of drawings]

FIG. 1 is a perspective view of a multi-head embroidery sewing machine.

FIG. 2 is a mechanical view of an embroidery sewing machine.

FIG. 3 is a front view showing an arrangement state of embroidery sewing machines.

FIG. 4 is a side view of the embroidery sewing machine.

FIG. 5 is a diagram showing an embroidery state by a multi-head embroidery sewing machine.

FIG. 6 is a diagram showing another example of embroidery by a multi-head embroidery sewing machine.

[Explanation of symbols]

 4 Cloth holding frame 14 Embroidery sewing machine 16F, 16R hook 21F, 21R needle

Claims (1)

[Claims] 1. A cloth holding frame which can be moved back and forth and left and right by a drive device, and a plurality of juxtaposed embroidery sewing machines which respectively embroider the cloth held by the cloth holding frame. Each embroidery sewing machine has a needle that can be lowered to and raised from the needle drop position, and a hook arranged below the needle drop position, and the cloth holding frame can be moved back and forth. In the multi-head embroidery sewing machine, in which the needles of the plurality of embroidery sewing machines and the hooks of the plurality of embroidery sewing machines are used to embroider the cloths held by the cloth holding frame, respectively, by moving the needles of the plurality of embroidery sewing machines from each other. The two needles which are vertically moved integrally with each other are arranged side by side in a direction intersecting the direction in which the embroidery sewing machine is arranged, and the hooks are respectively arranged below the needle drop positions corresponding to the two needles. Set up,
A multi-head embroidery sewing machine, wherein a plurality of patterns can be embroidered on the cloth in the direction in which the embroidery sewing machines are arranged in parallel, and at the same time, the same pattern can be arranged in a direction intersecting with the direction in which the embroidery machines are arranged.