JPH10284A - Sewing machine and method for sewing detachable fastener onto tape in multiple step way - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to sew on several detachable fasteners at the same time in multiple steps and in rows by feeding several detachable fasteners onto specified position of a tape and moving shell synchronously with the move of several sewing needles to sew on the fasteners. SOLUTION: Detachable fasteners E1-3 coming off from an auto feeder are brought through three outlet grooves 15 of a feed plate 13 onto specified position, in front of an upper application cloth T1 , a middle application cloth T2 and a lower application cloth T3 . Then the detachable fasteners E1-3 is put into gaps of the application cloth T1-3 so that their attach loops are wholly covered on turning the feed plate 13 horizontally around the axis of a shaft 14. Now, three sewing needles sew straight longways the upper edges of the application cloth T1-3, and feed of the tape T is stopped when ninth stitches are made. Then, sewing needles begin to move right and left by means of a link mechanism to zigzag sew one side of the attach loops. After that, the tape T is automatically fed out and the gaps of the attach loops are sewn, and then their another sides are sewn in zigzag form.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detachable tool used for clothing, for example, a detachable tool consisting of a hook of a male fitting and an eye of a female fitting used as a detachable fitting on the back of a brassiere or the like. The present invention relates to a method and an apparatus for sewing in a multi-stage manner.

[0002]

2. Description of the Related Art Conventionally, as a back attachment / detachment such as a bra, as shown in FIG. 10, an attachment / detachment comprising a hook H of a male fitting and an eye E of a female fitting has been used. The tape is sewn on the upper and lower two steps, or in a multi-step structure sewn on the upper, middle and lower three steps so that the wearer's comfort (tightening condition) can be adjusted. I have.

In order to attach the attachment / detachment tool to the tape in multiple stages, a special zigzag sewing machine which does not cause the tape to be fed during staggered operation (a sewing method in which the seam is a horizontal direction perpendicular to the tape advancing direction) is used. I have. In this staggered sewing machine, the feed of the tape and the attachment / detachment tool was automated, but since the sewing machine needle was a single needle, only one attachment / detachment tool could be sewn at one time (simultaneously).

[0004] The reason why the above-mentioned special staggered sewing machine is a single needle is that the feed plate and the automatic feeding device of the attachment / detachment tool are precise and complicated. The feed plate and the automatic feeding device of the attachment / detachment are located just above the lower thread hook of the sewing machine, so that there is no space for removing the lower thread bobbin when replacing the lower thread, and the needle and the lower thread for sewing the upper thread The bobbin must be swung to the left and right at high speed according to the stitch position and width, which complicates the structure and has technical difficulties such as the need to be lightweight to swing at high speed. Was to do.

[0005] As an example of sewing the above-mentioned attachment / detachment tool, for example, a method of attaching a female fitting eye used in a typical bra for women's underwear in three steps will be described.
As shown in FIG. 8, three sewing machines M ₁ , M ₂ , and M ₃ are installed in series, and the eye E is taped by the _first sewing machine M ₁ without correcting the position of the eye E at regular intervals (open loop). the sewed the first stage to the upper, sewn in the second stage at the center in the second unit of the sewing machine M _2, since in the sewing machine M ₃ of third car was sewn third stage in the lower part Not only is the production efficiency low, but the sewing pitch of the eye E is slightly different due to the expansion and contraction of the tape material, the sewing machine, etc., and this dimensional difference is accumulated and the first and second stages, the second and third stages are accumulated. The mounting position of the step was shifted, and when the brassiere was worn, the tape on the left and right back portions had a step, causing a problem.

In order to solve such a problem, at the stage of sewing the eye E, at present, the position of the eye E of the first stage is detected and fed back by the magnetic sensor, and the position of the eye E at the same position as the vertical direction of the first stage is obtained. The second and third eye E
Is manufactured by a divided sewing process of sewing.

However, in reality, there is a problem that the positions of the eyes E of the first stage, the second stage, the second stage and the third stage are not completely aligned due to the problems of accuracy and sensitivity of the magnetic sensor. As a result, a good product was not finished.

On the other hand, in Japan, the PL method has been enacted, and the process of inspecting a product with a needle detector has been widely adopted as an effective means for managing the remaining needles (undiscovered broken needles) of sewn products.
In order to enable the needle reading operation, a non-magnetic attachment / detachment tool different from an iron sewing machine needle having magnetism is also used in the attachment / detachment tool.

[0009]

However, since the non-magnetic attachment / detachment does not take on magnetism, it does not respond to the magnetic sensor for performing positioning at the time of sewing. The position to be sewn cannot be determined, sewing cannot be performed accurately and uniformly, and it is impossible to maintain the alignment position of the detachable tool, which is the basic quality of the multistage detachable tape.

As a method which does not use the position detection by the magnetic sensor, it is necessary to sew a required number of attachments and detachments at the same time, or to detect the position of the attachments / removals by another method different from the magnetic sensor.

[0011] As another attachment / detachment position detection without using a magnetic sensor, the position detection by image processing was examined. However, it becomes impossible due to the color of the tape cloth which is the background of the attachment / detachment.
It is not suitable because the image processing time is long and affects the sewing speed, and as another method, the position detection of radioactive isotopes can be considered, but it is not suitable because it requires special management according to laws and regulations. In the method of mechanically detecting the position, the attachment / detachment tool on the tape moves at the time of measurement, and the accurate position cannot be detected. Further, there is a problem that the measuring instrument does not accurately contact the metal fittings, and the variation is large. In each case, it was impossible to implement due to technical and legal difficulties.

[0012] A method of sewing a plurality of detachable tools simultaneously at a time is that there is no sewing machine having a necessary function (staggered sewing with a plurality of needles). When using the needle, the detachable device supply device to be sewn is located at the position where the bobbin is pulled out when replacing the bobbin thread. I understand.

SUMMARY OF THE INVENTION The present invention has been developed to solve the above problems, and has been researched and developed. It is possible to simultaneously sew a plurality of detachable tools in one step at a time in a multi-stage and aligned state. It is intended to provide a method and a sewing device for sewn a detachable tool to a tape in multiple stages so that the lower thread bobbin can be exchanged smoothly even when an automatic feeding device and a feed plate are located above a lower thread shuttle. is there.

[0014]

As a means for solving the above-mentioned problems and achieving the object, the present invention provides a plurality of tapes arranged in parallel in a direction perpendicular to the direction in which the tape moves on the sewing device. At the predetermined position of the tape below the sewing needle, a plurality of attachment / detachment tools are aligned and sent in the same direction, and the plurality of sewing needles are moved in the vertical and horizontal directions, and the shuttle is synchronized with this. We have developed and adopted a method of sewn the attachment / detachment to the tape in multiple stages, which is characterized by moving and sewing and attaching a plurality of attachment / detachment at the same time in multiple stages.

The present invention also relates to the above-described method of sewing the detachable tool to the tape in multiple stages, wherein the detachable device is sewn to the tape at predetermined intervals at the same pitch. The method and the method of changing the sewing pitch by changing the sewing pitch or evacuating the installation by evacuating the installation interval and skipping the installation interval to sew the mounting and detaching tool on the tape in multiple steps, and the mounting and dismounting tool is metallic Alternatively, a method was developed in which a detachable tool, such as a brassiere made of non-magnetized austenitic stainless steel or synthetic resin, was sewn in multiple stages of tape and adopted.

The present invention also provides a feed plate for simultaneously feeding a plurality of detachable tools from an automatic supply device to a predetermined position of a tape in the same direction, and a feed plate in a direction orthogonal to the tape moving direction on the sewing device. A needle mounting table provided with a plurality of sewing needles arranged side by side and swinging in the left-right direction while performing a sewing operation in the vertical direction, and synchronized with the swinging of the sewing needles in the needle mounting table in the left-right direction. A plurality of shuttles for capturing upper thread loops formed beside each sewing needle hole near the bottom dead center of the sewing needle, and sliding the shuttle and its driving mechanism to one side of the lower surface of the bed. We have developed and adopted a device that sews the detachable tool, which is characterized as described above, on the tape in multiple stages.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Reference numeral 1 denotes a sewing machine main body, and an arm 3 is provided upright on one side surface of a bed 2. . The arm 3 includes a base 3a, a horizontal portion 3b, and a head 3c. An upper shaft 4 is provided inside the horizontal portion 3b of the arm 3 as usual, and the upper shaft 4 is connected via a V-belt 5 by a motor (not shown) fixed below the bed 2. The flywheel 6 is rotationally driven by rotation.

A needle bar mounting member 8 is provided inside the head portion 3c of the arm 3 and swings left and right around the shaft 7 as a fulcrum. A needle bar 9 is mounted on the needle bar mounting member 8 so as to be vertically movable. ing. A needle mount 10 is fixed to the tip of the needle bar 9, and three sewing needles 11, 11, 11 are fixed to the needle mount 10 at small intervals in a direction orthogonal to the traveling direction of the tape T. I have.

The needle bar 9 reciprocates up and down by a known transmission mechanism from a driving source, and also oscillates in the left and right directions by a link mechanism 12. In the link mechanism 12, a horizontal rod 12a is connected to a lower protruding piece 8a of the needle bar mounting body 8, and a vertical rod 12b connected to the horizontal rod 12a is disposed inside the horizontal portion 3b. The bending rod 12c is connected,
Further, a vertically long rod 12d is disposed inside the base 3a on the bent rod 12c.

Reference numeral 13 denotes a feed plate for sending an attaching / detaching tool E which rotates horizontally about a pivot 14 provided on one side of the bed 2. Deriving grooves 15, 15, 15 for feeding three detachable device E _1, E _2, E ₃ supplied from known automatic feeder (not shown) is formed in the feed plate 13. As the attachment / detachment E, a metal or non-magnetized austenitic stainless steel or a synthetic resin is used.

Reference numeral 16 denotes a shuttle drive mechanism having functions of holding, adjusting, and supplying the lower thread, and intersecting the upper thread and the lower thread that have come under the tape together with the sewing needle. The drive mechanism 16 transmits the rotation of the upper shaft 4 to the lower shaft 17 by a known transmission means.
A rear drive shaft 18 that rotates through a gear 18a that meshes with a gear 17a fixed to the drive shaft and moves left and right, and a front drive shaft 20 that transmits to the drive shaft 18 via a timing belt 19 and rotates. And the rear drive shaft 1
The two helical gears 18b and 18c fixed to the hook 8
Helical gears 21a, 21a fixed to mounting shafts 1, 21
And the helical gear 20a fixed to the front drive shaft 20 is fixed to the mounting shaft of the shuttle 21.
a.

The three shuttles 21, 21, 21 include sewing needles 11, which swing together with the needle bar 9 swinging left and right.
It is configured to swing in synchronization with 11,11. The relative positional relationship between the sewing needle 11 and the shuttle 21 is, as shown in FIG.
The hooks 21 and 21 mounted on the rear drive shaft 18 are arranged at positions corresponding to the sewing needles 11 and 11 on the left and right. That is, on the central extension line of the thrust feed needle hole position N ₂ in the center of the sewing needle 11 are arranged, the central axis of the front of the shuttle 21, either side sewing an extension of 34 degrees about the axis of the hook 21 Needle holes 11, 11 piercing needle hole positions N ₁ , N ₃
And the central axes of the shuttles 21 and 21 are arranged. With this arrangement, the sewing positions of the attachment / detachment tools E ₁ , E ₂ , and E ₃ are aligned. The three shuttles 21, 21 and 21 are integrated by a lower plate 22, so that the three can slide together with the drive mechanism 16.

Reference numeral 23 denotes a lever attached to one side of the plate plate 22. The end of the lever 23 is desirably provided in the opening 24. Normally, the elastic piece 25 is in contact with the lower bulging portion 23a of the lever 23. The plate 22 is fastened by a stop member 26 fixed to one end of the bullet 25.

An example of the use of the sewing apparatus of the present invention configured as described above will be described. Three attachment / detachment tools E ₁ , E ₂ , and E ₃ automatically supplied from a known automatic supply device include a feed plate. fed in front of the upper presser fabric T _1, the central portion pressing cloth T ₂ and the lower pressing fabric T ₃ which is a predetermined position of the tape T through the three derived grooves 15, 15, 15 formed in the 13 . Thereafter, the feed plate 13 is horizontally rotated about the pivot 14, and the attachment / detachment tools E ₁ , E ₂ , E ₃ are respectively moved between the upper pressing cloth T _{1 at} the ends thereof.
Installation ring portion E 'is挾入to be covered between between the central portion pressing cloth T ₂ and the lower pressing fabric T _3.

When the attachment / detachment tool E is clamped at a predetermined position, sewing starts. The sewing is sewn as shown in the schematic stitch diagram shown in FIG. That is, FIG.
Stitch S ₁ to S ₉ are sewn needle 11, 11, 11 are vertically moved in, and indicates that the upper end of the presser fabric T _1, T _2, T ₃ are straight stitch in the longitudinal direction, The feeding of the automatically fed tape T is stopped when the seam 9 is completed.

When the feeding of the tape T is stopped, the needle bar 9 swings right and left by the link mechanism 12, and accordingly the sewing needles 11, 11, 11 also swing right and left, and the zigzag seam S one of the mounting ring portion E 'is sewn in ₁₀ to S _15. Then again automatically feeds the tape T that has been stopped the feed, is sewn between the mounting ring portion E 'and E' at seam S ₁₆ to S _17. Stop the feeding of the tape T again, and
Zigzag seams S _{18 to} S
_{With 23} , the other mounting ring H 'is sewn. By repeating this series of operations, the attachment / detachment tool E sequentially moves the tape T at predetermined intervals.
Sewn on. This attachment / detachment E has been described as an example in which sewing is performed regularly at predetermined intervals. However, sewing may be performed at irregular intervals by changing the sewing pitch. There may be various modified examples such as skipped ones.

Next, the operation of replacing the bobbin of the lower thread will be described. The feed plate 13 of the attachment / detachment tools E _{1 to} E ₃ and its driving device are located above the shuttle 21, so that it is impossible to take out the bobbin from the shuttle 21. (See FIGS. 1 and 3) For this purpose, a plate plate 22 having a built-in shuttle 21 and its driving mechanism 16 is provided.
By sliding (see FIG. 4) one side (see FIG. 5), the position of the shuttle 21b indicated by the two-dot chain line,
The lower thread bobbin can be replaced by being moved upward to a place where there is no problem.

When the lever 23 is depressed against the elasticity of the bullet 25 abutting on the lower bulging portion 23a of the lever 23 attached to one side of the plate plate 22, the lever 25 engages with the lever 23. Is released, the engagement between the stop member 26 and the plate plate 22 is released, and the bobbin in the shuttle can be replaced by sliding the plate plate 22 to one side.

In the above embodiment, the description has been given of the case where the eye of the female fitting is used as the attaching / detaching tool E. However, the present invention can of course be applied to the hook of the male fitting or a similar attaching / detaching tool. Naturally, various design changes can be made without departing from the scope of the present invention and without departing from the gist of the present invention.

[0030]

As described above, according to the method of sewn the attachment / detachment tool to the tape in multiple stages according to the present invention, a plurality of tapes arranged side by side in the direction perpendicular to the direction of movement of the tape on the sewing device are arranged. A plurality of attachment / detachment tools are aligned and sent in the same direction to a predetermined position of the tape below the sewing needle, and the sewing needles are moved in the vertical and horizontal directions, and the shuttle is moved in synchronization with this. It is characterized by the fact that a plurality of detachables are simultaneously attached in multiple stages, so that a plurality of detachables can be sewn simultaneously and in multiple stages at one time, and the sewing process can be simplified, Significant cost reduction can be achieved. In addition, it is possible to obtain a product of high commercial value in which the attachment / detachment sewn on each step is arranged at a precise position in the vertical direction.

Also, the attachment / detachment device can be attached to the tape at a predetermined interval at the same pitch, or the attachment / detachment device can change the sewing pitch so as to skip the attachment interval with unequal intervals or empty attachment. According to the intended use, it is possible to obtain a tape with a removable tool that is densely mounted at a position where the tensile strength is strong and widened at a position where the tensile strength is weak. In addition, the attachment / detachment tool can be attached in an aligned state irrespective of magnetic or non-magnetic properties, and the production efficiency is remarkably improved, which is suitable for mass production.

Further, according to the sewing apparatus of the present invention, in which a plurality of attachment / detachment tools are sewn to a tape in multiple stages, a plurality of attachment / detachment tools are simultaneously sent from the automatic supply device to a predetermined position of the tape while being aligned in the same direction. A needle mounting table on which a plurality of sewing needles are mounted, which are arranged side by side in a direction perpendicular to the tape moving direction on the sewing device, and swing in the horizontal direction while performing the sewing operation in the vertical direction; A plurality of shuttles that synchronize with the horizontal swing of the sewing needle of the needle mounting base and capture upper needle loops formed beside each sewing needle hole near the bottom dead center of the sewing needle, Since the shuttle and its drive mechanism are configured to be slid to one side of the lower surface of the bed, an automatic supply device and a feed plate of a detachable tool are provided at an upper portion of the lower thread shuttle. Even if it has been, by sliding the shuttle and drive mechanism to one side It can be carried out smoothly without any problem the exchange of the lower thread.

[Brief description of the drawings]

FIG. 1 is a simplified vertical sectional front view showing a sewing machine of the present invention.

FIG. 2 is a simplified bottom view as seen from below the sewing machine bed of the present invention.

FIG. 3 is a simplified plan view of a portion where a feed plate is arranged.

FIG. 4 is a simplified plan view showing a portion of the shuttle.

FIG. 5 is a simplified plan view in which the shuttle mechanism is slid as seen from the direction of arrows AA in FIG. 1;

FIG. 6 is a schematic view of a stitch according to the present invention.

FIG. 7 is a plan view showing a state in which the attachment / detachment tool is sewn.

FIG. 8 is a front view showing a conventional sewing example.

FIG. 9 is a plan view of a tape with a detachable tool showing a conventional sewing process.

FIG. 10 is a plan view of two conventional types of tapes with detachable tools.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewing device 10 Needle mount 11 Sewing needle 13 Feed plate 16 Drive mechanism 21 Hook

Claims (5)

[Claims] 1. A plurality of attachment / detachment tools are aligned in the same direction at predetermined positions on a tape below a plurality of sewing needles arranged side by side in a direction perpendicular to a direction in which the tape travels on a sewing device. Characterized in that the sewing needles are moved in the vertical and horizontal directions, and the hook is moved and sewn in synchronization with the sewing needles, and a plurality of detachable tools are simultaneously attached in multiple stages. A method in which tools are sewn to tape in multiple stages. 2. The method according to claim 1, wherein the attachment / detachment device is sewn to the tape at a predetermined interval at the same pitch. 3. The method of sewing a detachable tool to a tape in a multi-step manner, wherein the detachable tool is sewn to a tape by changing a sewing pitch and unequally spaced or evacuating the attachment and skipping the attachment interval. . 4. The method according to claim 1, wherein the attachment / detachment is an attachment / detachment such as a brassiere made of metallic or non-magnetic austenitic stainless steel or synthetic resin. 5. A feed plate for simultaneously feeding a plurality of attachment / detachments from an automatic supply device to a predetermined position of a tape in the same direction, and a feed plate arranged above the sewing machine in a direction perpendicular to a tape moving direction. A needle mounting table provided with a plurality of sewing needles swinging in the left-right direction while performing a sewing operation in a vertical direction; and a sewing needle synchronized with the swinging of the sewing needles in the needle mounting table in the left-right direction. And a plurality of shuttles for catching upper thread loops formed beside each sewing needle hole near the bottom dead center, and the shuttle and its drive mechanism are slid to one side of the lower surface of the bed. A device that sewes a detachable tool on a tape in multiple stages.