JP2002177675A - Rubber thread sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably obtain a sewn article having a well-finished elastic expandable portion by sewing rubber thread with a plurality of rubber threads equally stretched. SOLUTION: A rubber thread sewing machine has a rubber thread intermittent delivery mechanism 30 capable of delivering a plurality of rubber thread 7 by elastically pinching and relatively rotating the plurality of rubber threads 7 by a driving roller 34 that can be intermittently driven and rotated only in one direction by a matched tensile force and a following roller 45 elastically butting the periphery thereof between a thread handling area 9B arranged before the direction of progress of sewing rather than a plurality of sewing needles 4 arranged side by side in the direction perpendicular to the direction of progress of sewing and introducing and guiding the plurality of rubber threads 7 into between the needle plate 3 and a presser bar 9 correspondingly to the sewing needles 4 along the top face of a needle plate 3, and the supply section of the plurality of rubber threads 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of sewing a plurality of rubber threads on a back surface of a cloth while entangled with a sewing thread forming a seam when sewing with a plurality of sewing needles. The present invention relates to a rubber thread sewing machine that can form an elastically stretchable portion that can be freely extended.

[0002]

2. Description of the Related Art A rubber thread sewing machine of this type has been proposed in the past, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. 53-53. The conventionally proposed rubber thread sewing machine is shown in FIGS.
As shown in FIG. 0, a plurality of sewing needles 4 are arranged side by side in a direction orthogonal to a sewing traveling direction X along an upper surface of a needle plate 3 fixed to the bed portion 2 of the mince body 1. A plurality of thread bobbins 5 serving as rubber thread supply portions are provided on the front side of the sewing needles 4 in the sewing traveling direction X in accordance with the number of the sewing needles 4 and a locking guide 6 is provided. A thread tensioner 8 for imparting a predetermined tension to a plurality of rubber threads 7 fed through and a rubber thread 7 to which a predetermined tension is applied by the thread tensioners 8 correspond to the respective sewing needles 4. A thread path 10 is provided between the needle plate 3 and the presser plate 9 to guide the introduction. The thread path 10 is in the form of an elongated strip corresponding to the width of the presser plate 9, and has a plurality of rubber plate insertion holes (not shown) corresponding to each of the sewing needles 4.
A plurality of rubber threads 7 are aligned and guided between the needle plate 3 and the presser plate 9.

At the exit side in the sewing progress direction X between the sewing needles 4 and the presser plate 9, a sewn cloth and a plurality of rubber threads 7 are sandwiched from above and below at a predetermined speed to advance the sewing progress direction. X
Pair of upper and lower gear rollers 11 forcibly transferred to the rear of
A rear puller 11 composed of a and 11b is installed.
A rubber thread looper 12 is provided between the thread path 10 and the sewing needles 4. This rubber thread looper 12
Is a long and narrow strip having guide holes 12a through which a plurality of rubber threads 7 penetrate at locations corresponding to the plurality of sewing needles 4, respectively. And is configured to be reciprocally movable in a direction perpendicular to the sewing traveling direction X.

Since a rubber thread looper driving device for reciprocating the rubber thread looper 12 is basically the same as that described in detail in an embodiment of the present invention described later,
The description is omitted in FIGS. 9 and 10. Also, as shown in FIG.
The plurality of needle threads 13 supplied to the sewing needles 4 via the locking guides 20 and the thread bobbins (not shown) are fed out, and the plurality of loopers (not shown) are passed through the locking guides 21. ) For supplying a predetermined tension to the looper yarns 14 supplied to each of the thread tensioners 15.
And a thread tensioner 16 for the looper thread, a plurality of thread paths 17 and 18 for guiding the supply of the needle thread 13 and the looper thread 14 to the sewing needle 4 and the looper. Are well-known, and a detailed description thereof will be omitted.

According to the conventional rubber sewing machine constructed as described above, a plurality of rubber threads 7 fed from the bobbin 5 and supplied through the locking guides 6 are connected to the thread tensioners 8. After it is passed through the insertion hole of the yarn path 10 and aligned in a state where a predetermined tension is applied by the
Are guided between the needle plate 3 and the press plate 9 through the guide holes 12a, and the cloth is placed between the needle plate 3 and the press plate 9 so as to be on the upper side of the rubber threads 7. Insert In this state, the sewing machine is operated to advance a predetermined amount of sewing, and the cloth and the rubber thread 7 are bitten between a pair of upper and lower gear-shaped rollers 11a and 11b constituting the rear puller 11, whereby each rubber thread is 7 are aligned and stretched with a predetermined tension, and are forcibly transferred in the sewing progressing direction X together with the cloth.

When the sewing operation is continued in this state, the rubber thread looper 12 reciprocates in a horizontal plane in a direction orthogonal to the sewing advance direction X in synchronization with the raising and lowering operation of the sewing needles 4. The rubber threads 7 are swung so as to repeatedly traverse the elevating paths of the sewing needles 4.
Therefore, as shown in FIG. 11, with the raising and lowering movement of the sewing needles 4 and the swinging movement of the looper, the needle thread 13 and the looper thread 14 are entangled with the back thread of the sewing thread 23 forming a seam in the fabric 22. A rubber thread 7 having a predetermined tension is sewn on the back side of the fabric 22 to thereby elastically stretch the fabric 22 at a desired position after the sewing as shown in FIG. An elastic part is formed.

[0007]

In the conventional rubber thread sewing machine described above, a thread tensioner is used as a tension applying means for sewing a plurality of rubber threads onto a cloth while applying a predetermined tension to the rubber threads. In this case, the thread to be sewn has elasticity, and since the elasticity is not uniform, the thread originally has a function of giving frictional resistance to the thread. It is extremely difficult to evenly adjust the tension of multiple rubber threads with a thread tensioner having a thread tensioner, and it is inevitable that the tension of multiple rubber threads will vary, resulting in the sewing of multiple rubber threads. However, there is a problem in that a sewn product having a poor finish is generated due to, for example, distortion of the elastic expansion and contraction portion of the fabric formed.

The present invention has been made in view of the above circumstances, and sews a plurality of rubber threads in a state in which tension is evenly applied to the rubber threads to form a sewing having an elastic elastic portion having a good finish. An object of the present invention is to provide a rubber thread sewing machine capable of reliably obtaining a product.

[0009]

In order to achieve the above object, a rubber thread sewing machine according to the present invention is arranged side by side in a direction perpendicular to the direction of sewing along the upper surface of a needle plate. A plurality of sewing needles, and a plurality of rubber threads which are arranged on the near side in the sewing progress direction with respect to the sewing needles and are sent out from the rubber thread supply unit, corresponding to each sewing needle, are provided between the needle plate and the holding plate. It has a thread path for introducing and guiding, and a guide hole through which a plurality of rubber threads derived from the thread path penetrate, and reciprocates in a horizontal plane between the thread path and the sewing needle in a direction orthogonal to the sewing progress direction. A rubber thread looper freely installed, and a rubber thread looper driving device that reciprocates the rubber thread looper in synchronization with the raising and lowering operation of the sewing needle, and includes the thread path and the rubber thread looper. Guided between needle plate and presser plate In the rubber thread sewing machine configured to sew the rubber thread on the back surface of the fabric with a plurality of sewing needles, the intermittent drive rotatable only in one direction between the thread path and the rubber thread supply unit. It consists of a drive roller and a follow-up roller that elastically abuts on the outer peripheral surface of the rubber. A yarn intermittent sending mechanism is provided.

According to the present invention having the above-described characteristic configuration, the plurality of rubber yarns sent out from the rubber yarn supply section toward the yarn path follow the driving roller constituting the rubber yarn intermittent sending mechanism. Once it is elastically sandwiched between the rollers, the rollers are sequentially sent out to the yarn path side by a fixed amount with the intermittent relative rotation of both rollers, and are aligned with the yarn path and Will be introduced during this period. Therefore, it has elasticity, and, by intermittently sending a plurality of rubber threads having a variation in the elasticity via a pair of rollers of the above-mentioned intermittent sending out mechanism of the rubber thread, a plurality of rubber threads are provided. Tension is evenly applied to the rubber thread, and a plurality of rubber threads with the same tension are entangled with the sewing thread and sewn to the fabric. It is possible to obtain

In particular, by knurling the outer surface of at least one of the pair of rollers constituting the intermittent feeding mechanism of the rubber thread, the rubber thread is elastically sandwiched between the pair of rollers at the time of intermittent feeding. By preventing the occurrence of slippage in the rubber thread, it is possible to further ensure the action of uniformly applying tension to the plurality of rubber threads.

[0012] Further, by configuring the reciprocating movement range of the rubber thread looper to be adjustable, the sewing pattern (sewing pitch) of the rubber thread can be arbitrarily adjusted to form various elastic expansion and contraction portions having different expansion and contraction allowances. can do.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the overall construction of a rubber thread sewing machine according to the present invention, and FIG. 2 is an enlarged view of a main part of the sewing machine. The rubber thread sewing machine shown in FIGS. It has the same basic configuration as the rubber thread sewing machine, and the same or corresponding components and portions as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

The configuration of the rubber thread sewing machine shown in FIGS. 1 and 2 which is different from the conventional rubber thread sewing machine is as follows.
A rubber thread intermittent delivery mechanism 30 instead of the conventional rubber thread tensioner
And a plurality of rubber thread insertion holes 10a..., 10b... Corresponding to each of the sewing needles 4 in the form of an elongated strip immediately before and immediately after the rubber thread intermittent sending mechanism 30. The point is that the yarn paths 10A and 10B are provided.

The intermittent rubber thread delivery mechanism 30 is shown in FIGS.
As shown in FIG. 7, a shaft 3 is attached to a base frame 31 having a U-shape in plan view, which is fixed to the bed 2 of the sewing machine main body 1.
2. a cylindrical large-diameter drive roller 34 rotatably supported via a bush 33 and the like;
And a small-diameter follower roller 45 elastically abutting on the outer peripheral surface via a compression spring 44, and a plurality of rubbers introduced between the pair of rollers 34, 45 via the immediately preceding yarn path 10A. By elastically holding the yarns 7 and rotating relative to each other, the tension of the rubber yarns 7 is equalized and the yarn path 1
It is configured to be able to send out to 0B.

Of the pair of rollers 34 and 45 constituting the rubber thread intermittent delivery mechanism 30, the cylindrical large-diameter drive roller 3
A one-way rotation clutch 36 is provided in a hollow portion of the shaft 4 via a sleeve 35, and a swing lever 37 having a long hole 37a is fixedly connected to one end of the shaft 32 by a bolt 38. Long hole 37 of moving lever 37
A set screw 39, which is screwed and fixed to a distal end portion of a connecting rod 40 which can be reciprocally driven and moved substantially in the sewing progressing direction X via an eccentric (not shown) interlocking with a main shaft of a sewing machine (not shown) in a. Movably mated, thereby
The large-diameter drive roller 34 is driven by the connecting rod 40 via the eccentric to reciprocate substantially in the sewing advance direction X, so that the set screw 39, the swing lever 37, and the one-way rotary clutch 3 are moved.
It is configured to be rotatable intermittently in only one direction via the motor 6.

On the other hand, the small-diameter following roller 45 is rotatably supported at an intermediate portion of a swing fitting 42 pivotally connected to the base frame 31 via a guide shaft 41. A clamp 46 is connected to the upper end of the swinging fitting 42 via a small-diameter shaft 43. The compression spring 44 is fitted around the outer periphery of the clamp 46, and the clamp 46 is attached to the base frame 31. The fastener is extended outward through a band-shaped fastening member 47 fixed to the opening of the fastening member. The lever 51 with the cam 50 that contacts the outer end surface of the adjustment screw 49 that is held is pinned.

With the above configuration, the small-diameter following roller 4
5 rotates the lever 51 in the direction of the arrow ab in FIG. 4 to change the contact point of the cam 50 with the outer end surface of the adjusting screw 49, thereby driving the large diameter by the compression spring 44 as shown in FIG. Both rollers 3 are urged toward the outer peripheral surface
The rubber thread 7 is elastically sandwiched between the rollers 4 and 45, and the rubber thread is passed away from the outer peripheral surface of the large-diameter drive roller 34 against the compression spring 44 as shown in FIG. And the adjustment screw 49
By adjusting the position, the elastic contact force of the large-diameter drive roller 34 with respect to the outer peripheral surface, that is, the elastic clamping force of the rubber thread 7 by the rollers 45 and 34 can be adjusted.

The outer peripheral surfaces of the large-diameter drive roller 34 and the small-diameter follow-up roller 45 are knurled to prevent the rubber threads 7 from slipping. As shown in FIG. 5, both the yarn paths 10A and 10B are fixed to the base frame 31 in a cantilever state.

A rubber thread looper driving device for reciprocating the rubber thread looper 12 is configured as shown in FIG. That is, the base end of the rubber thread looper 12 is fixed to the looper mount 62 via the bolt 60 and the long hole 61 so as to be position-adjustable, and the looper mount 62 is connected to the looper through the long hole 63 and the screw 64. The upper oil cover is fixed to the bed 65 of the sewing machine main body 1 via screws 66 'so as to be reciprocally slidably fitted to and supported by the guide 65 in a direction perpendicular to the sewing traveling direction X. 66 is fixed to the upper surface.

A vertically rotating shaft 68 rotatably supported by the upper oil cover 66 via a bearing 67 has a worm gear 69 at its lower end and a worm 70 meshed with the worm gear 69.
, The upper end of the vertical rotation shaft 68 is projected above the bed 2 via a washer 72, a thrust bearing 73, a collar 74, and the like. Protruding rotating shaft 6
The eccentric position of the upper end face 8 and one end of the looper mount 62 are connected by a link 75.

With the above configuration, the rubber thread looper 1
The rubber thread looper driving device is configured so as to be slidably guided by a looper guide 65 in reciprocating drive in a direction perpendicular to the sewing traveling direction X in a horizontal plane in synchronization with the raising / lowering operation of the sewing needles 4. And this rubber thread looper 1
The reciprocating range of the rubber thread looper 12 can be adjusted by adjusting the fixing position of the two base ends to the looper mount 62 via the bolt 60 and the long hole 61.

The rubber thread sewing operation by the rubber thread sewing machine configured as described above is basically the same as that of the above-described conventional sewing machine, except that a plurality of bobbin reels drawn out of the bobbins 5 are used. Are passed through the rubber thread intermittent delivery mechanism 30 immediately before being introduced into the entrance between the needle plate 3 and the presser plate 4 and guided. More specifically, the insertion hole 1 of the yarn path 10A which is unwound from the bobbin 5.
A plurality of rubber yarns 7... Passed through and aligned with a large diameter driving roller 3 constituting a rubber yarn intermittent sending mechanism 30.
4 and a knurled outer peripheral surface of the small-diameter follow-up roller 45, which are once elastically clamped.
4 and 45, the yarn path 10 is sequentially changed by a constant amount according to the intermittent relative rotation.
After being sent out to the B side and being aligned on this yarn path 10B,
Each of the sewing needles 4 is penetrated by a guide hole 12a of a rubber thread looper 12 that reciprocates in a direction perpendicular to the sewing traveling direction X in a horizontal plane in synchronization with the lifting and lowering operation of the sewing needles 4.
Are guided to the entrance between the needle plate 3 and the presser plate 9 while being repeatedly swung so as to traverse the ascending and descending paths respectively.

Therefore, even if the plurality of rubber threads 7 have elasticity and vary in their elasticity, the plurality of rubber threads 7 are formed by a pair of rollers of the intermittent rubber thread sending mechanism 30. Since the fixed amount is intermittently sent out through 34 and 45, a uniform tension is applied to the plurality of rubber yarns 7... As shown in FIG.
By sewing on the back side of the cloth 22 in a state of being entangled with the back side sewing thread of the sewing thread 23, it is possible to obtain a high-quality finished sewing product having an elastic expansion and contraction portion without distortion or the like.

Further, a plurality of rubbers 7, which are intermittently sent out via a pair of rollers 34, 45 of the rubber thread intermittent sending-out mechanism 30, are penetrated and held, and synchronized with the elevating operation of the sewing needles 4. The sewing pattern (sewing pitch) of the rubber threads 7 can be arbitrarily adjusted by adjusting the reciprocating movement range of the rubber thread looper 12 which is reciprocally driven and moved in the direction perpendicular to the sewing traveling direction X in the horizontal plane. As a result, it is possible to form various elastic expansion and contraction portions having different expansion and contraction margins.

[0026]

As described above, according to the present invention, a plurality of rubber threads are elastically sandwiched in one direction as a means for applying tension to each rubber thread when sewing the plurality of rubber threads to the cloth. Since a rubber thread intermittent delivery mechanism having a pair of rollers that are intermittently driven and rotated only intermittently is used, each of the plurality of rubber threads has elasticity, and even if the elasticity varies. By the intermittent fixed-quantity sending action, these rubber threads can be sewn in a state where equal tension is applied to all of the plurality of rubber threads. This produces an effect that a sewn product having a good elastic elastic portion can be reliably obtained.

In particular, by knurling the outer surface of at least one of the pair of rollers constituting the intermittent sending mechanism of the rubber thread as described in claim 2, the pair of rollers at the time of intermittent sending is formed. It is possible to prevent slippage of the rubber thread elastically held between the rollers, thereby ensuring more uniform tension applying action to the plurality of rubber threads, and further improving the finish.

According to the third aspect of the present invention, the reciprocating movement range of the rubber thread looper can be adjusted, so that the sewing pattern (sewing pitch) of the rubber thread can be arbitrarily determined in addition to the above-mentioned effects. And various elastic elastic portions having different expansion and contraction allowances can be formed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a rubber thread sewing machine according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an exploded perspective view showing a rubber thread intermittent delivery mechanism which is a main part of the sewing machine.

FIG. 4 is an assembled plan view of the rubber thread intermittent delivery mechanism.

FIG. 5 is an assembled front view of the rubber thread intermittent delivery mechanism.

FIG. 6 is a longitudinal sectional side view showing an assembled and operating state of the rubber thread intermittent delivery mechanism.

FIG. 7 is a longitudinal sectional side view showing an assembled / non-operating (threading) state of the rubber thread intermittent delivery mechanism.

FIG. 8 is an exploded perspective view showing a driving device of a rubber thread looper, which is another main part of the sewing machine.

FIG. 9 is a perspective view showing the entire configuration of a conventional rubber thread sewing machine.

FIG. 10 is an enlarged view of a main part of FIG. 9;

FIG. 11 is a front view showing a sewn product.

FIG. 12 is a front view of a state where a sewn product is extended.

[Explanation of symbols]

 REFERENCE SIGNS LIST 3 needle plate 4 sewing needle 7 rubber thread 9 presser plate 10A, 10B thread path 12 rubber thread looper 12a guide hole 22 fabric 30 rubber thread intermittent sending mechanism 34 large-diameter drive roller 45 small-diameter follow-up roller

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masato Hosokawa 180 Sanda, Shijonawate-shi, Osaka Morimoto Manufacturing Co., Ltd. F-term (reference) 3B150 AA11 AA20 AA22 BB07 CB03 CD01 CE27 DE03 DE07 DE14 DE18 DE23 EH02 EH06 EH17

Claims (3)

[Claims] 1. A plurality of sewing needles juxtaposed in a direction orthogonal to a sewing advance direction along an upper surface of a needle plate, and a rubber thread supply arranged at a position closer to the sewing advance direction than these sewing needles. A thread path for introducing and guiding a plurality of rubber threads sent from the section between the needle plate and the presser plate corresponding to each sewing needle, and a guide through which a plurality of rubber threads derived from the thread path penetrate. A rubber thread looper which has a hole and is installed so as to be able to reciprocate in a direction orthogonal to the sewing progress direction in a horizontal plane between the thread path and the sewing needle, and this rubber thread looper is used for raising and lowering the sewing needle. A rubber thread looper driving device that reciprocates in synchronism with a plurality of rubber threads that is guided between the needle plate and the holding plate via the yarn path and the rubber thread looper. Rubber configured to be sewn to the back of the fabric with sewing needles In a thread sewing machine, a drive roller intermittently rotatable only in one direction and a follower roller elastically abutting on the outer peripheral surface thereof are provided between the thread path and the rubber thread supply unit. A rubber thread sewing machine characterized by comprising a rubber thread intermittent sending mechanism capable of sending a plurality of rubber threads elastically and rotating them relative to one another so that the tension of each rubber thread can be made uniform. 2. The rubber thread sewing machine according to claim 1, wherein a knurling process is performed on at least one roller outer surface of a pair of rollers constituting the rubber thread intermittent delivery mechanism. 3. The rubber thread sewing machine according to claim 1, wherein the rubber thread looper is configured to be able to adjust a reciprocating movement range thereof.