JPH10174791A - Embroidery sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a small embroidery sewing machine with excellent appearance by providing an embroidery frame for supporting work cloth where embroidery sewing is executed and a needle which is driven up and down in a vertical direction by means of a needle bar elevating/lowering means arranged in the lower part of work cloth so as to pull up string upwards after penetrating work cloth. SOLUTION: The needle 36 is elevated by needle bar elevating/lowering mechanism 40 from a state where it is in the lowest part and string 30 is made to penetrate work cloth 4 in a state where string 30 hung from a looper 24 is put on a hook part 34 so as to pull-up the needle 36 upwards. The needle 36 is lowered from the state where it is in the highest part and, in this case, string 30 is hung from string loop holding needle 8 so as to be held. Then, work cloth 4 is horizontally moved for the portion of one stitch and a loop is formed on work cloth 4. The formed loop is sent out to an external side through the string loop through-hole 10 of a string loop constituting part 6. These processes are repeatedly executed so as to execute embroidery and a needle hole plate 16 is turned by the needle hole plate rotating mechanism 22 when the progress direction of cloth 4 is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embroidery sewing machine for forming sagar stitches and chain stitches on the upper surface of a work cloth.

[0002]

2. Description of the Related Art Conventionally, loop stitching with this type of embroidery sewing machine is performed as follows. That is, the hook is made to penetrate the cloth from above the cloth, and is lowered downward. next,
Under the cloth, the looper is rotated to hook the thread on the hook of the lowered hook. Then, by raising the hook above the cloth, the thread is pulled up above the cloth to form a loop on the cloth. Then, the cloth is moved sideways by one glance. It is performed by repeating the above steps one after another.

[0003]

However, in the conventional embroidery sewing machine, the hooks and the mechanism for raising and lowering the hooks are arranged above the cloth, so that the entire embroidery sewing machine becomes large and extremely large. There was also a problem in that workers were given the impression that the machine was a machine, and spoiled the aesthetic appearance of the design. For this reason, it is an unsuitable machine to install in a clothing store (a so-called shop) that provides embroidery to general consumers.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an embroidery sewing machine capable of reducing the size of the entire embroidery sewing machine and improving the appearance.

[0005]

In order to achieve this object, an embroidery sewing machine according to the present invention comprises an embroidery frame for supporting a work cloth on which embroidery sewing is performed, and an embroidery frame. And a needle for reciprocatingly driving the needle bar up and down in the up and down direction so that the thread penetrates the work cloth and lifts the thread upward. Therefore, during embroidery sewing, when the needle is raised by the needle bar raising / lowering means, the needle pulls a thread upward through the work cloth.

In the embroidery sewing machine according to a second aspect of the present invention, a rotary drive body rotatable around the needle is provided below the work cloth, and the rotary drive body is provided above the work cloth. It is characterized in that a thread loop holding member is provided for rotating in conjunction with the rotation of the driving body and for detachably locking the thread pulled up by the needle. Therefore, at the time of embroidery sewing, when the needle is raised by the needle bar raising / lowering means,
The needle pulls the thread upward through the work cloth. The pulled-up yarn is locked by the yarn loop holding member, and then the needle is lowered and detached from the yarn loop holding member by transferring the work cloth.

According to a third aspect of the present invention, the embroidery sewing machine is characterized in that the rotary drive is configured to rotate in conjunction with the transfer of the work cloth. Therefore, during the embroidery sewing, when the work cloth is transferred after the thread pulled up by the needle is locked by the thread loop holding member, the rotation driving body is interlocked with the transferred work cloth. Rotates.

Further, the embroidery sewing machine according to claim 4 is
At least one of the opposing surfaces of the rotation driving body and the yarn loop holding member includes a magnet that attracts the other by a magnetic force,
The yarn loop holding member is configured to rotate in synchronization with the rotation of the rotation driving body by the attraction of the magnet. Therefore, the rotation driving body and the thread loop holding member can be linked with a simple configuration.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an embroidery sewing machine according to the present invention will be described below with reference to the drawings.

FIG. 1 is a partial sectional view showing a main part of the present embodiment.

A work cloth 4 is placed on the upper surface of the needle plate 2. Above the work cloth 4, a yarn loop constituting section 6 is arranged. A thread loop holding needle 8 as a thread loop holding member is provided in the inside of the thread loop forming section 6. Holes 10a and 10b are formed. FIG. 2 shows the bottom surface of the thread loop forming section 6. A needle hole 12 is formed at the center thereof, and a pair of magnets 14 are embedded around the needle hole 12.

On the other hand, the needle plate 2 is provided with a disk-shaped needle hole plate 16 having a needle hole 18 formed at the center. The needle hole plate 16 is rotatably supported on the needle plate 2 about the needle hole 18. Is mounted. Therefore, magnets 14 and 2
Due to the magnetic attraction of zero, the thread loop forming section 6 is rotated in conjunction with the rotation of the needle hole plate 16. The needle hole plate 16 is rotated by the needle hole plate rotating mechanism 22 in accordance with the traveling direction of the work cloth 4 to the left or right.

The work cloth 4 is sent two-dimensionally by a cloth feed mechanism (not shown) based on the embroidery data.

Below the needle hole plate 16, a looper rotating mechanism 2 is provided.
A column-shaped looper 24 rotated by 6 is arranged. The looper 24 has a circular insertion hole 2 at its center.
8 are formed, and thread paths 32a and 32b are formed so that the thread 30 is suspended above the insertion hole 28. A needle 36 having a hook portion 34 for hanging the thread 30 is arranged so as to be able to pass through the needle holes 12, 18 and the insertion hole 28. The needle 36 is vertically moved by a needle bar lifting mechanism 40. It is attached to a needle bar 38 to be moved.

The operation of the embroidery sewing machine configured as described above will be described below with reference to FIG. 1 and FIGS.

FIG. 1 is a view showing a state where the needle 36 is at the lowest position. From this state, the needle 36 is raised by the needle bar lifting mechanism 40. Then, the thread 30 suspended on the looper 24 is hooked on the hook portion 34, and in this state, the needle 36
Pulls the thread 30 through the work cloth 4 and pulls it up. FIG. 3 is a diagram showing a state where the needle 36 is at the highest position. From this state, the needle 36 is lowered. And
As shown in FIG. 4, the yarn 30 is hung and held by the yarn loop holding needle 8. From this state, the work cloth 4 is laterally moved by one glance, and a loop is formed on the work cloth 4 as shown in FIG. The loop formed on the work cloth 4 is sent out of the yarn loop forming unit 6 through the yarn loop hole 10a of the yarn loop forming unit 6. The above steps are repeated one after another. Here, when the moving direction of the cloth changes, the needle hole plate 16 is rotated by the needle hole plate rotating mechanism 22, and the thread loop forming section 6 is also rotated accordingly, so that the embroidery is completed. Until the above operation is repeated.

When the work cloth 4 is fed in the opposite direction, a single-ring chain stitch can be formed on the work cloth 4. That is, first, the same operation as the steps of FIGS. 1, 3 and 4 is performed. However, the looper 24
Is at a position rotated by 180 ° from the aforementioned position. Thereafter, as shown in FIGS. 6, 7 and 8, the work cloth 4 is transported in the opposite direction. Then, a single-ring chain stitch is formed on the work cloth 4, and when the work cloth 4 is further fed, the formed chain stitch passes through the thread loop through hole 10 b of the thread loop forming section 6. Are sent out of the yarn loop forming section 6. The above steps are repeated one after another. Here, when the traveling direction of the cloth changes,
The needle hole plate 16 is rotated by the needle hole plate rotating mechanism 22, and the thread loop forming unit 6 is also rotated accordingly, so that the above operation is repeated until the embroidery is completed.

In the present embodiment, the hook 36 is formed on the needle 36 and the looper 24 is arranged. However, even if the ordinary sewing needle is used and the looper 24 is not arranged, the needle 36 may be used. No problem.

[0019]

As is apparent from the above description, according to the embroidery sewing machine according to the first aspect of the present invention, in particular, the needle bar elevating means arranged below the work cloth reciprocates vertically. The embroidery sewing machine is provided with a needle for penetrating the thread through the work cloth and pulling the thread upward, so that the entire embroidery sewing machine can be reduced in size, the installation space is not required, and the appearance is good. Can be provided.

Further, according to the embroidery sewing machine according to the second aspect, a rotary drive body which is rotatable around the needle is provided below the work cloth, and the rotation driving body is provided above the work cloth. Since a thread loop holding member is provided for rotating in conjunction with the rotation of the dynamic driving body and for detachably locking the thread pulled up by the needle, one-sided sewing of embroidery stitching is ensured. can do. Further, by changing the height of the thread loop holding member, the height of the loop formed above the work cloth can be freely changed.

Further, according to the embroidery sewing machine according to the third aspect, the rotary driving body is configured to rotate in conjunction with the transfer of the work cloth. When the work cloth is transferred after the set yarn is locked by the yarn loop holding member, the rotation driving body can be rotated in conjunction with the transferred work cloth.

Further, according to the embroidery sewing machine according to the fourth aspect, at least one of the opposing surfaces of the rotation driving body and the thread loop holding member is provided with a magnet for attracting the other by a magnetic force, and the magnet is attracted. By acting, the yarn loop holding member is configured to rotate in conjunction with the rotation of the rotation driving member, so that the rotation driving member and the yarn loop holding member can be linked with a simple configuration. it can.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing a main part of an embroidery sewing machine according to an embodiment of the present invention.

FIG. 2 is a bottom view of the yarn loop forming unit.

FIG. 3 is an explanatory diagram showing a process of forming a yarn loop.

FIG. 4 is an explanatory diagram showing a process of forming a yarn loop.

FIG. 5 is an explanatory diagram showing a process of forming a yarn loop.

FIG. 6 is an explanatory view showing a process of forming a chain stitch.

FIG. 7 is an explanatory view showing a process of forming a chain stitch.

FIG. 8 is an explanatory diagram showing a process of forming a chain stitch.

[Explanation of symbols]

 4 Work cloth 6 Thread loop constituent part 8 Thread loop holding needle 24 Looper 36 needle

Claims (4)

[Claims] 1. An embroidery frame for supporting a work cloth to be sewn, and a needle bar lifting / lowering means disposed below the work cloth reciprocatingly drives the thread in the work cloth, thereby forming a thread on the work cloth. An embroidery sewing machine comprising a needle that penetrates through and lifts the needle upward. 2. A rotating driver that is rotatable around the needle is disposed below the work cloth, and above the work cloth in conjunction with the rotation of the rotating driver. 2. The embroidery sewing machine according to claim 1, further comprising a thread loop holding member for pivotally rotating and releasably locking the thread pulled up by the needle. 3. The embroidery sewing machine according to claim 2, wherein the rotation driving body is configured to rotate in conjunction with the transfer of the work cloth. 4. A magnet for attracting the other by a magnetic force to at least one of the opposing surfaces of the rotation driving body and the thread loop holding member, and the attraction of the magnet causes the rotation of the rotation driving body to rotate. 4. The yarn loop holding member is configured to rotate in conjunction with the rotation of the yarn loop holding member.
The embroidery sewing machine described in.