JP3008221B2 - Thread processing method at the time of sewing such as jump pattern sewing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a chain stitch embroidery sewing machine to sew, for example, jump patterns one after another, or to sew the same pattern one after another in a number of places. The present invention relates to a thread processing method when one pattern has been sewn.

[0002]

2. Description of the Related Art Conventionally, when one of the above-mentioned patterns is sewn and the place on the cloth is to be changed and the next pattern is to be sewn, a loop-shaped thread which has been pulled up by a hook portion of a hook is conventionally used. Is being cut with scissors.

[0003]

In the conventional thread processing method, when a large number of patterns are sewn one after another as in the case of the above-described jump pattern sewing or the like, each of the patterns has to be performed one by one. Each time it is completed, the above-mentioned work must be performed.
The operating rate of the sewing machine is reduced
Was. Furthermore, the loop created on the cloth as described above
Is cut on a piece of cloth and two yarn ends are formed on the cloth.
There is a problem that the edge disturbs the embroidery pattern.
However, there is a problem that this processing must be performed .

The present invention has been made to solve the above-mentioned problems (technical problems) of the prior art. After the sewing of one handle is completed, the thread and the cloth are moved by raising the hook or moving the cloth laterally. By cutting off the edge with the hook and leaving only one thread end as a minimum to prevent the thread from being unraveled on the cloth, the next It is an object of the present invention to provide a thread processing method at the time of sewing such as jump pattern stitching, which can shift to pattern sewing.

[0005]

According to the present invention, a thread processing method at the time of sewing such as jump pattern sewing is performed by rotating a looper provided below the needle plate and vertically moving a hook needle provided above the needle plate. By repeatedly pulling out the thread from the looper to the upper surface side of the cloth by the hook portion of the hook and moving the cloth by one glance in this state, the sewing on the cloth on the needle plate is performed by chain stitching. In the case of ending the sewing of one handle to the cloth, the hook is passed through the loop of the thread on the cloth formed immediately before, and the thread under the cloth is removed by the hook portion of the cloth. After being pulled out in a loop on the upper surface side of the, first, the thread between the cloth and the looper is cut by a thread cutting device provided in advance to cut the thread between the cloth and the looper, Of the cut yarn ends, the yarn end connected to the cloth Increase the hooking needle to a sufficient height to exit on the upper face side of the fabric, or, by traversing to the open eye needle a sufficient distance fabric to the yarn end comes out on the top side of the fabric,
The yarn end connected to the cloth is pulled up to the upper surface side of the cloth while passing through the loop of the yarn on the cloth formed immediately before on the cloth.

[0006]

When the sewing of one handle to the cloth is completed, the thread between the cloth and the looper is cut first with the hook portion pulling out the thread in a loop on the upper surface side of the cloth.
Next, the hook is raised to a height high enough to cause the thread end of the cut thread end connected to the cloth to escape to the upper surface side of the cloth. Alternatively, the cloth is moved laterally with respect to the hook needle by a distance sufficient for the thread end to escape to the upper surface side of the cloth. As a result, the yarn end connected to the cloth is pulled up to the upper surface side of the cloth while passing through the final loop on the cloth.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In FIG. 1, reference numeral 1 denotes a well-known needle plate of an embroidery sewing machine having a needle hole 2. Reference numeral 3 denotes a well-known looper provided rotatably in a horizontal plane below the needle plate 1, and reference numeral 4 denotes a threading hole in the looper 3. Reference numeral 5 denotes a well-known hook needle which is freely movable up and down through the needle hole 2 above the needle plate 1, and 6 denotes a hook portion of the hook needle 5. Next, 7 is the needle plate 1
Is a well-known thread cutting device provided on the lower side, and includes a pair of fixed blades 8 and a movable blade 9 for thread cutting. The one composed of two pairs of movable blades may be used. Reference numeral 10 denotes a thread end holding mechanism that operates in conjunction with the thread cutting device 7. Reference numeral 11 denotes a holding tool in the mechanism 10, which is a receiving piece 12 fixedly provided.
And a pressing piece 13 made of a spring material elastically in contact with the receiving piece 12. Reference numeral 14 denotes a pushing piece in the thread end holding mechanism 10, which is integrally attached to the movable blade 9.

Next, a description will be given of the thread processing in the case where the jump pattern sewing as shown in FIG. 2 is performed on the cloths 16 and 17 by the thread 18 supplied through the threading hole 4 of the looper 3 by the embroidery sewing machine by the above-mentioned chain stitching. . Note that in FIG.
Reference numerals 19a, 19b, and 19c denote individual patterns in the flying pattern. The cloths 16 and 17 shown in FIG. 1 are stretched on a known upholstered frame which horizontally moves on the table of the sewing machine, and are moved laterally by the lateral movement of the upholstered frame. First, as shown in FIG. 1A, the vertical movement of the hook 5 and the looper 3
The hook 18 pulls the thread 18 hooked on the hook portion 6 from the looper 3 to the upper surface side of the cloths 16 and 17 in a loop, and the cloths 16 and 17 move by one stroke (for example, 1.6 mm to 2 mm). )
This is repeated, for example, the handle 19a of FIG. 2 is sewn. In FIG. 1A, reference numerals 20, 20, and 20a denote loops of the yarn 18 appearing in a chain-like manner on the upper surface side of the cloth 16.

When the sewing of the one handle 19a is completed,
As shown in (A), the vertical movement of the needle 5 is stopped in a state where the hook 6 pulls out the thread 18 to the upper surface side of the cloth 16 in a loop. Then, the thread cutting device 7 and the thread holding mechanism 10 are operated as shown in (B), (C), and (D). That is, first, the pushing piece 14 that moves toward the holding tool 11 as shown in (B) moves a part of the thread 18 between the cloth 17 and the looper 3 between the receiving piece 12 and the holding piece 13 of the holding tool 11. The thread 18 between the cloth 17 and the holder 11 is then inserted into the fixed blade 8.
(C), and the movable blade 9 and the pushing piece 14 return to their original positions as shown in (D). In this state, of the cut yarn ends, the yarn end 18a connected to the cloth 17 hangs down from the needle hole 2, and the looper 3
Are held by the holder 11.

Next, as shown in (E), the hook 5 is raised higher than the raised position at the time of normal sewing. The height of the cut ends 18a and 18b is set to a sufficient height so that the yarn ends 18a connected to the cloths 16 and 17 of the cut-out yarn ends 18a and 18b can escape to the upper surface side of the cloth 16. The raising is performed by a mechanism that raises the hook needle 5 to the retracted position for changing the cloth, which is well known in this type of sewing machine. When the hook needle 5 is raised in this manner, the thread end 18a connected to the cloth 17 as shown in FIG. The edge with the hook 5 is cut off from the portion 6. Even if the thread end 18a is hooked on the hook 6 on the shape, it is not restrained at all, so that the edge with the hook 5 is substantially cut off (for the lateral movement of the cloth described below). State. When this happens, the cloth 1
The positions of the next handle 19b to be sewn are positioned below the hooks 5 by the large lateral movement of the hooks 6 and 17, and the ring sewing by the vertical movement of the hooks 5 and the rotation of the looper 3 is performed again.

Next, the steps (B) to (D) in FIG. 1 may be performed while the raising of the hook needle 5 is continued, and the process may be shifted to the step (E) while continuing the rising. The thread may be cut between the cloth and the looper as long as the hook 6 pulls the thread in a loop toward the upper surface of the cloth, before the hook 5 comes out of the cloths 16 and 17. It may be done at the time.

Next, FIG. 3 shows a different embodiment of the present invention, and shows a process instead of the above-mentioned FIG. 1 (E).
In this example, after cutting the yarn 18 and holding the yarn end 18b by the steps up to (D) in FIG.
As shown in FIG. 3, the cloths 16 and 17 are largely moved laterally.
The distance is set to a distance sufficient for the yarn end 18a connected to the cloths 16 and 17 to escape to the upper surface side of the cloth 16. As a result, the yarn end 18a connected to the cloth 17 as shown in the figure passes through the immediately preceding loop 20a on the cloth 16 and comes out to the upper surface side of the cloth 16, and is released from the hook 6 and the hook Edge cut off. Above cloth
The lateral movement of the cloths 16 and 17 may also serve as the lateral movement for bringing the place where the next handle 19b is to be sewn on the cloths 16 and 17 below the hook 5. Parts that are functionally considered to be the same as or equivalent to those in the preceding figure are given the same reference numerals as in the preceding figure, and redundant description is omitted.

[0013]

As described above, according to the invention of the present application, when sewing one pattern 19a at the time of sewing such as jump pattern sewing, the hook 6 attaches the thread to the upper surface side of the cloths 16 and 17. In the state of being pulled out in a loop shape, first, the yarn between the cloths 16 and 17 and the looper 3 is cut by the thread cutting device 7 provided in advance for cutting the yarn between the cloths 16 and 17 and the looper 3. , And then, the hook needle 5 is raised to a height sufficient to allow the thread ends 18a of the thread ends 18a and 18b connected to the cloths 16 and 17 to escape to the upper surface side of the cloths 16 and 17; Or, the above yarn end 18
cloth 1 only a distance enough for a to escape to the top side of cloths 16 and 17
6 and 17 are moved laterally with respect to the hook 5, so that the cut thread end 1
8a is extracted while passing through the immediately preceding loop 20a on the cloth, so that the yarn end 18a is prevented from being unraveled and the edge with the hook 5 is cut off. This means that when a large number of patterns 19a, 19b, 19c are sewn one after another, it is possible to immediately proceed to the sewing of the next pattern as it is. Has been useful in solving the problem that the sewing machine has been required, and reducing the downtime of the sewing machine to improve its operation rate.

Further, in the present invention, as described above,
After the hook 6 lifts the thread 18 into a loop, cut the thread under the cloth.
Cut the thread end 18a there, and
Because it is extracted upward while passing through 0a,
Under the condition that the yarn end 18a can be prevented from unraveling
Another feature is that the number of yarn ends can be limited to a minimum of one. This
It is pulled up on the cloth by a hook as before.
What happens when a thread loop is cut on a cloth
There are three problems with the subsequent processing of the yarn, namely
The processing of the inverted V-shaped remaining yarn, the two pulled out on the cloth
It can solve the processing of the yarn end and the processing of the yarn remaining on the back of the cloth at once.
Thread processing method at the time of sewing such as jump pattern sewing
It has a very useful effect.

[Brief description of the drawings]

FIGS. 1A to 1E are diagrams sequentially illustrating a thread processing method at the time of sewing such as jump pattern sewing;

FIG. 2 is a diagram showing an example of a flying pattern.

FIG. 3 is a view showing another embodiment which is an alternative to the step of FIG.

[Explanation of symbols]

 1 Needle plate 3 Looper 5 Hook 6 Hook 16, 17 Cloth 18a Cut thread end 20a Final loop

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D05B 1/00-83/00 D05C 1/00-13/06

Claims (1)

(57) [Claims] 1. A thread is pulled out of the looper from the looper to the upper surface side of the cloth by the hooks of the hook needle by the rotation of the looper provided below the needle board and the vertical movement of the hook needle provided above the needle plate. In the method of performing chain stitch sewing on the cloth on the needle plate by repeatedly performing that and moving the cloth in the state by one stitch, in the case of ending sewing of one pattern to the cloth, The hook is passed through a loop of thread on the cloth just formed
In the state, the thread under the cloth is pulled out in a loop on the upper surface side of the cloth by the hooks thereof, and then the cloth is firstly cut by a thread cutting device provided in advance for cutting the thread between the cloth and the looper. Then, the hook between the looper and the looper is cut, and then, among the cut ends, the thread end connected to the cloth is raised to a height high enough to escape to the upper surface side of the cloth, or Move the cloth laterally enough with respect to the hook to allow the thread end to escape to the top side of the cloth, and form a thread end connected to the cloth immediately before the above on the cloth.
A thread processing method at the time of sewing such as jump pattern sewing, wherein the thread is pulled up to the upper surface side of the cloth while passing through a loop of the thread on the cloth .