JPH04161190A - Sewing device for annular rubber - Google Patents

Abstract

PURPOSE:To improve work efficiency by constituting the above device so that sewing is completed by setting annular rubber and cylindrical cloth and only operating a start switch of a sewing machine by a worker. CONSTITUTION:In plural rollers, rubber receiving/detaching rollers 1, 2 are drawn back to the direction orthogonal to the cloth feeding direction, when partial rollers containing a roller immediately before a needle location part 8 is positioned on the outside of cylindrical cloth C to be sewn, and also, a sewing start part reaches a prescribed position of this side thereof. Also, the rollers concerned are provided with a cloth stretching roller 5 which is placed on the inside of annular rubber R extended around plural rollers, and also, moves in the direction orthogonal to a shaft in order to overhang the annular rubber R to the outside after the sewing start part reaches the prescribed position, and a receiving roller 6 which is placed in the inside of the annular rubber R extended around plural rollers, and also, in the lower part of the annular rubber R passing through this side of the needle location part 8, and moreover, allows the annular rubber R to ascend to the upper part than the throat plate surface 9 of a sewing machine together with the cylindrical cloth C after the sewing start part reaches the prescribed position. In such a way, sewing can be executed automatically by only setting the annular rubber and the cylindrical cloth by a worker.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an annular rubber sewing device that can automatically sew an annular rubber to the waist portion of briefs, for example.

[Prior Art] As mentioned above, the process of sewing a circular rubber to the waist portion of briefs involves first passing the circular rubber around multiple rollers so that it passes through the needle drop of the sewing machine, and then sewing the circular rubber onto the waist of the briefs. This is done by setting the needle so that its end overlaps the end of the annular rubber at the needle drop, and then operating the sewing machine.

In such work, for example, as shown in FIG. 5, the annular rubber R is stretched around a plurality of rollers 101 to 104 in a stretched state to match the waist circumference of the cylindrical material C. Further, the cylindrical material C is connected to rollers 103 and 104 along with the annular rubber R from the needle drop portion 105 to the rear side thereof.
The needle is wound around the roller 1 before the needle drop part 105.
It is set so that it passes through the inside of 01.102 and the needle drop part 105. That is, the annular rubber R and the cylindrical fabric C
The material is sandwiched between rollers 102 and 101, passes inside and outside the rollers, and is sent to the needle drop section 105 where it is sewn.

However, when sewing the annular rubber R and the cylindrical fabric C as described above, the progress of the annular rubber R and the cylindrical fabric C is stopped by the roller 102 when the sewing start portion reaches the roller 102. will be blocked. For this reason, conventionally, before the sewing start portion reaches the roller 102, the operator partially removes the annular rubber R from the rollers 101 and 102.
is removed by hand, and the annular rubber R and the cylindrical fabric C are aligned on the roller 102 and re-hanged.
5 to complete the sewing.

[Problems to be Solved by the Invention] However, in the conventional annular rubber sewing device, the operator manually attaches the annular rubber and the cylindrical fabric for sewing after the sewing start portion reaches the roller 102. Since the needle must be sent to the needle drop section, one worker must always work exclusively on one device, which has been a hindrance to improving overall work efficiency.

Further, since some parts are sewn by hand, there is a risk that the quality of the product may vary depending on the operator, and there is also a problem in that it is difficult to supply a uniform and good product.

The invention was made in view of the above circumstances,
By wrapping the annular rubber around multiple rollers, the annular rubber can be set at a position where it passes through the needle drop with its circumferential direction matching the fabric feeding direction of the sewing machine, and by operating the sewing machine, This is an annular rubber sewing device that can sew the set annular rubber to the end of a cylindrical fabric.The operator can automatically sew from the beginning to the end of sewing by simply setting the annular elastic and the cylindrical fabric. An object of the present invention is to provide an annular rubber sewing device that can be used to sew annular rubber.

[Means for Solving the Problems] A sewing device for annular rubber according to a first aspect of the invention that achieves the above-mentioned object is characterized in that, among the plurality of rollers, some of the rollers, including at least the roller immediately before the needle drop portion, are used for sewing. It is a rubber receiving and removing roller located outside the cylindrical fabric to be worn, and retracts in a direction perpendicular to the fabric feeding direction when the sewing start portion reaches a predetermined position in front of it, and is hooked on the plurality of rollers. a fabric stretching roller that is disposed inside the rotated annular rubber and moves in a direction perpendicular to the axis to cause the annular rubber to extend outward after the sewing start portion reaches the predetermined position, and the plurality of rollers. It is placed inside the looped rubber and below the loop of rubber that passes in front of the needle drop, and after the sewing start portion reaches the predetermined position, the loop of rubber is placed on the needle plate surface of the sewing machine along with the cylindrical fabric. It is characterized by being equipped with a rubber receiving roller that raises the device further upward.

In a second invention, in the first invention, the fact that the sewing start portion has reached the predetermined position is determined by a signal generated when the count of the number of stitches from the start of sewing reaches a predetermined value. It is characterized by the fact that it does so.

- Furthermore, the third invention is characterized in that the arrival of the sewing start portion at the predetermined position is known by an output signal of a detector that detects the sewing start portion.

In the annular rubber sewing device according to a fourth aspect of the present invention, in the second or third aspect of the present invention, the fabric tension roller moves as described above in response to a signal indicating that the sewing start portion has reached the predetermined position. The present invention is characterized in that the rubber receiving roller and the rubber receiving roller move backward or upward after a predetermined period of time has elapsed since the signal was generated.

In the annular rubber sewing device according to the fifth aspect of the invention, there are two or more fabric tension rollers, at least a part of which also serves as a part of the plurality of rollers.

A device according to a sixth invention is a device according to each of the inventions as described above, which is provided in front of the needle drop portion corresponding to the cutter for trimming the edge of the cylindrical material, and has a cylindrical shape disposed below the cutter between the needle plate and the needle plate. A guide plate is provided to form a path for guiding the fabric, and when the sewing start portion advances from the predetermined position to a second predetermined position in front of the needle drop portion, the rubber receiving roller further rises and the cylinder is moved. Lifting the shaped fabric onto the guide plate.

[Function] In the devices of the first to sixth inventions, when the sewing start portion reaches a predetermined position, the rubber receiving and removing roller retreats in a direction perpendicular to the fabric feeding direction, so that the annular rubber and the cylindrical fabric are moved by the roller. The needle is guided to the needle entry area without being obstructed by the needle. Even when the rubber receiving and removing roller retreats, the annular rubber maintains the necessary tension by moving the fabric tensioning roller in a direction perpendicular to its axis. Furthermore, the rubber receiving roller lifts the annular rubber and the cylindrical fabric upwards in front of the needle drop, so that the annular rubber and the cylindrical fabric at the end of sewing are integrated and sent to the needle drop.

In particular, in the device according to the sixth invention, since the cylindrical fabric moves onto the guide body in the same manner as the annular rubber at the end of sewing, the guide plate moves the cylindrical fabric and the annular rubber in a straight line with respect to the needle drop. without interfering with

[Example] Next, an annular rubber sewing device according to the invention will be described based on an illustrated example.

As shown in FIG. 1, this annular rubber sewing device includes rubber receiving and removing rollers 1 and 2, a rear fabric tensioning roller 3, a rear roller 4, a front fabric tensioning roller 5, and a rubber receiving roller 6. . Of these, the rubber receiving/removing roller 1.2, the back fabric tensioning roller 3, and the rear roller 4 constitute a plurality of setting rollers that wrap around the annular rubber when setting the annular rubber. By passing the annular rubber around these setting rollers, a predetermined tension is applied to the annular rubber, and the annular rubber is set at a position where it passes through the needle drop section 8 with its circumferential direction aligned with the fabric feeding direction of the sewing machine.

The rubber receiving and removing roller 1.2 is rotatably attached to an L-shaped angle 7. As is clearer in FIG. 3A or 3B, one of the rubber receiving and removing rollers 1 is disposed above the throat plate surface 9 in front of the needle drop section 8 of the sewing machine M. Further, the other rubber receiving and removing roller 2 is disposed on the front side of the rubber receiving and removing roller 1 and below the throat plate surface 9. At the same time, when these rubber receiving and removing rollers 1 and 2 are in operation, they are arranged at operating positions extending from above the sewing psl passing through the needle drop portion 8 to the right side of the sewing line sl, as shown in FIG. There is. The angle 7 is a bar-shaped connecting member 10 extending toward the front.
This connecting member 10 is fixed to the air cylinder 1.
1 piston rod lla. The air cylinder 11 is fixed to a mounting part 12.
2 is vertically installed on a bracket 13 fixed to the base of the sewing machine M.

The piston rod lla moves back and forth in a direction perpendicular to the fabric feeding direction of the sewing machine M, and normally sets the rubber receiving and removing roller 1.2 at the operating position, and by moving back, it moves to a standby position on the right side of the operating position. Evacuate.

The back fabric tensioning roller 3 is disposed below the needle drop section 8 and at a lower position than the rubber receiving and removing roller 2. The rear fabric tensioning roller 3 is rotatably attached to the tip of an arm 14 extending in the fabric feeding direction. Also,
The rear end of the arm 14 is connected to a rotating shaft 15a of a rotary air cylinder 15 fixed to the base of the sewing machine. Therefore, by operating the air cylinder 15, the tip of the arm 14, that is, the rear fabric tension roller 3 can swing up and down. The air cylinder 15 is used at a rubber setting position (see Fig. 3A or 3B), which is a position where the rear fabric tensioning roller 3 is used as a setting roller for the annular rubber, and at a fabric tensioning position (see Fig. 3A or 3B) below this rubber setting position. 3C or 3D)).

The rear roller 4 is arranged behind the needle drop section 8 so that its upper end side is located on substantially the same plane as the throat plate surface 9. The rear roller 4 is paired with a feed roller 16 connected to a drive source. Feed roller 16 and rear roller 4
The sewn annular rubber and cylindrical fabric are pinched together and sent to the rear of the sewing machine. The feed roller 16 moves up and down in synchronization with the presser foot 17. That is, the presser foot 17 is
At the same time as the feed roller I6 descends to sandwich the annular rubber and the cylindrical fabric between the rear roller 4 and the rear roller 4, the feed roller I6 sandwiches the annular rubber and the cylindrical fabric between the feed roller I6 and the rear roller 4.

The front fabric tensioning roller 5 is rotatably attached to a mounting member 18. This mounting member 18 is fixed to a sliding member 19 that is slidably supported along the lower surface of the bracket 13. This sliding member 19 is fixed to a block portion 19Aa of an air cylinder 19A.

By supplying air to the vibrator 19Ab, a part of which is shown, this block portion 19Aa can move forward and backward in the direction that coincides with the fabric feeding direction, and therefore the front fabric tensioning roller 5 can also move in the fabric feeding direction. I can do it.

As shown in FIG. 3A or 3B, the front fabric tensioning roller 5 is normally in a standby position where its center is located behind the line connecting the centers of the rubber receiving and removing roller 2 and the rear fabric tensioning roller 3. It's retreating. Then, by operating the air cylinder 19A, the front fabric tensioning roller 5 is moved from the standby position to the position shown in FIG.
As shown in Fig. D, the center moves to an operating position located in front of the sewing machine on the line connecting the centers of the rubber receiving and removing roller 2 and the rear fabric tensioning roller 3.

The rubber receiving roller 6 is disposed in front of the needle drop portion 8 and near the bottom of the rubber receiving and removing roller 1 . The rubber receiving roller 6 is rotatably attached to a mounting member 21 fixed to a connecting member 20 extending in a direction perpendicular to the fabric feeding direction. The base end portion of the connecting member 20 is fixed to an elevating member 23, and this elevating member 23 is connected to a piston rod 22a of an air cylinder 22. The air cylinder 22 is installed vertically on the base of the sewing machine M and is fixed to an L-shaped mounting member 24 having a horizontal portion at the upper end, and its piston rod 22a can move forward and backward in the vertical direction. A guide rod 25 that is parallel to the piston rod 22a is erected on the elevating member 23, and the guide rod 25 passes through the mounting member 24 and projects upward. A cylindrical abutment member 26 is attached to the tip of the guide rod 25. Further, a ring-shaped stopper 27 is attached to the guide rod 25 at an intermediate portion between the elevating member 23 and the mounting member 24 .

The mounting position of this stopper 27 can be moved up and down. An L-shaped mounting member 28 that extends upward and has a horizontal portion at the tip is attached to the mounting member 24 so that its position can be adjusted in the vertical direction. An air cylinder 29 is fixed thereto. A cylindrical abutment member 30 is fixed to the piston rod 29a. This contact member 3
0 is set on the same axis as the abutment member 26 fixed to the guide rod 25. Also, piston rod 2
2a and 29a are both extended, the tip of the abutting member 30 faces the tip of the abutting member 26 at a predetermined distance.

The rubber receiving roller 6 has piston rods 22a and 29a.
When both are stretched, the upper end side thereof is set at a standby position located slightly below the throat plate surface 9. When the piston rod 22a of the air cylinder 22 is retreated, the elevating member 23 rises to a position where the abutting member 26 abuts the abutting member 30, and the rubber receiving roller 6 moves accordingly to the first raised position.

When the piston rod 29a of the air cylinder 29 is moved back with the rubber receiving roller 6 reaching the first raised position, the piston rod 22a can be moved back further. Along with this retreat, the elevating member 23 rises to a position where the stopper 27 abuts the mounting member 24, and at this time, the rubber receiving roller 6 reaches the second raised position.

As shown in FIG. 2, a cutter 32 for trimming the edges of the cylindrical fabric is disposed in front of the needle drop section 8.

This cutter 32 includes a fixed blade 32a having a cutting edge set on the same plane as the throat plate surface 9, and a cutting edge that moves up and down in synchronization with the driving of the sewing machine and intersects the cutting edge of the fixed blade 32a by this vertical movement. The movable blade 32b is provided with a movable blade 32b.

A fabric guide member 31 is located at a position corresponding to the cutter 32.
is installed. This fabric guide member 31 forms a passage between it and the needle plate surface 9, which is large enough for the cylindrical fabric to pass through, and as the cylindrical fabric passes through this passage, its edges are cut by the cutter 32. It doesn't ripple too much even when moving.

A fabric correction device is disposed at an intermediate portion between the rubber receiving roller 6 in the standby position and the front tie tensioning roller 5 in the standby position. This fabric correction device includes a pair of fabric correction rollers 41a and 41b, a fabric edge detector 42, and a step motor (not shown) connected to the rotating shaft of one of the fabric correction rollers 41a.

The fabric correction roller 41a has a rotating shaft that is parallel to the fabric feeding direction and inclined with respect to the throat plate surface 9, and is attached to the rubber receiving roller 6 with only a part of its outer periphery being sprayed onto the fabric passing surface. It is located below.

As mentioned above, a step motor (not shown) is connected to the rotating shaft of the fabric correction roller 41a.

On the other hand, the fabric correction roller 41b has a rotation axis perpendicular to the fabric feeding direction, and is rotatably supported by a roller support portion 44 provided at the tip of the arm 43.

The roller support portion 44 is provided on the arm 43 via a spring 45. The base end of the arm 43 is connected to the operating shaft 46 of the rotary air cylinder 46 attached to the bracket 13.
connected to a. By operating the air cylinder 46, the fabric correction roller 41b has an active position where it clamps the cylindrical fabric between it and the fabric correction roller 41a, and a standby position where it is separated from the fabric correction roller 41a and retreated toward the front side of the sewing machine. It can be rotated between.

The fabric edge detector 42 is composed of a pair of left and right transmission type photoelectric switches. When both the left and right photoelectric switches detect cylindrical fabric, the fabric edge detector 42 generates a correction signal to the step motor to rotate the fabric correction roller 41a one step to the left in front view, and vice versa. To,
When the left and right photoelectric switches no longer detect the cylindrical fabric, a correction signal is generated to the step motor to rotate the fabric correction roller 41a one step to the right in front view. Such a correction signal causes the cylindrical fabric to move to the left or right by an amount corresponding to the one step. The correction signal is generated until the left photoelectric switch detects the cylindrical fabric and the right photoelectric switch does not detect the cylindrical fabric.

The annular rubber sewing device constructed as described above operates according to the timing chart shown in FIG. 4.

First, prior to operating the sewing device, the annular rubber R is passed through the needle drop portion 8 and wound around the rubber receiving and removing rollers 1 and 2, the back fabric tension roller 3, and the rear roller 4. Next, the cylindrical material C is set in the needle drop section 8 so that its end overlaps the end of the annular rubber R. At this time, it is sufficient that the cylindrical material C is inserted under the annular rubber R and the presser foot 17 via the rubber receiving roller 6 and the cutter 32.

After setting the annular rubber R and the cylindrical fabric C as described above, when you press the start switch of the sewing machine, first presser foot 9
Then, the feed roller 16 descends and presses the annular rubber R and the cylindrical material C. At the same time, by operating the air cylinder 46, the fabric correction roller 41b rotates to the operating position.
Fabric correction roller 4 corresponding to this fabric correction roller 41b
Hold the cylindrical dough C between 1g of dough.

When the start switch is kept pressed, the predetermined time T set by the timer. A sewing machine drive signal is generated at the point in time when the sewing machine starts sewing. In Fig. 3A, the sewing progresses as described above, and the sewing start portion SE is located at the rear fabric tension roller 3.
This shows the state in which the position has been reached.

As the sewing of the annular rubber R and the cylindrical fabric C progresses as described above, when the sewing start portion SE reaches a predetermined position in front of the rubber receiving and removing roller 2, as shown in FIG. 3B, at this point A rubber catch removal signal is generated. This rubber catch removal signal can be generated, for example, by counting the number of needle movements since the sewing machine starts driving, and when this count reaches a predetermined value.

When this rubber receiving/removing signal is generated, the sewing machine drive signal is temporarily stopped. At the same time, the air cylinder 15 and the air cylinder 19A are operated, and as shown in FIG. 3C, the rear fabric tensioning roller 3 is lowered to the fabric tensioning position, and the front fabric tensioning roller 5 is moved to the operating position. Further, the air cylinder 46 is activated and the fabric correction roller 41b is retracted to the standby position.

After the rubber retainer release signal is generated, the air cylinder 1
1. Air is supplied to 22, piston rod lla,
22a retreats. However, in this embodiment, a difference is provided between the time required for the supplied air to reach the air cylinder 11 and the time required for the supplied air to reach the air cylinder 22, thereby making it possible to The piston rod 22a is moved backward.

Therefore, when the predetermined time T has elapsed, the rubber receiving rollers 1 and 2 first retreat to the standby position, and then after a time lag, the rubber receiving roller 6 rises to the first raised position.

With the above procedure, the rear fabric tensioning roller 3 moves to the fabric tensioning position, the front fabric tensioning roller 5 moves to the operating position, and
When the rubber receiving roller 6 moves to the first raised position and the rubber receiving and removing roller 1.2 retreats to the standby position, as shown in FIG. 3C, the annular rubber R and the cylindrical fabric C are It is wound around the roller 4, the rear fabric tension roller 3, the front fabric tension roller 5, and the rubber receiving roller 6.

Next, after a predetermined time T2 (>TI) set by the timer has elapsed after the rubber receiver removal signal is generated, the sewing machine drive signal is generated again and sewing is resumed. At this time, both the annular rubber R and the cylindrical material C are not hindered in their progress by any roller, and are guided to the needle drop portion 8 by passing outside the front material tensioning roller 5 and the rubber receiving roller 6. Ru.

When the sewing further progresses in the state shown in FIG. 3C and the sewing start portion SE reaches the vicinity of the rubber receiving roller 6, at this point a rubber receiving rising signal is generated and the sewing machine drive signal is stopped. The rubber receiver rising signal can be generated by counting the number of needle movements after the sewing machine drive signal is generated again, and when this count reaches a predetermined number.

When a predetermined time T set by a timer has elapsed after the rubber receiver rise signal is generated, the air cylinder 29 is activated and the piston rod 29a is moved back.

By retracting the piston rod 29a in this manner, the piston rod 22a of the air cylinder 22 can be further retracted, and as a result, the rubber receiving roller 6 is raised to the second raised position. In this manner, when the rubber receiving roller 6 rises to the second raised position, the cylindrical fabric that has been guided below the guide plate 31 is lifted onto the guide plate 31.

Next, after a predetermined time T4 (>73) set by a timer has elapsed after the rubber receiver rise signal is generated, the sewing machine drive signal is activated again and sewing is resumed. At this time, since the cylindrical fabric is lifted above the guide plate 31, the cylindrical fabric C and the annular rubber R are The fabric is guided smoothly in the direction of guide without twisting.

After the sewing machine drive signal is restarted after the predetermined time T4 has elapsed, the sewing machine drive signal is finally stopped when a predetermined number of needle movements has been counted. After this stop, a thread trimming signal is generated when a predetermined time T5 set by a timer has elapsed, and a thread trimming device (not shown) cuts the sewing thread.
This completes the sewing of the annular rubber R and the cylindrical fabric C.

After the thread cutting device cuts the sewing thread, a predetermined time T6
When the time has elapsed, the rear fabric tensioning roller 3 rises from the fabric tensioning position to the rubber setting position, and the front fabric tensioning roller 5 retreats from the operating position to the standby position. Also, after the thread cutting device cuts the sewing thread, a predetermined time T7 (>7
6), the rubber receiving roller 1.2 returns to the operating position and the rubber receiving roller 6 returns to the standby position. At the same time, the feed roller 16 and the presser foot 17 are
rises to the standby position. At this point the sewing item can be removed from the device. Finally, when a predetermined time has elapsed after the elapse of the predetermined time T7, the piston rod 29a of the air cylinder 29 is extended and the abutment member 30 is returned to its initial position.

As explained above, according to the above-mentioned annular rubber sewing device, the operator simply sets the annular rubber R and the cylindrical material C in the device and then operates the start switch of the sewing machine, and the sewing starts automatically. Complete. The operator then only has to take out the sewing item. Therefore, while the device is sewing, the operator can allocate his/her work force to other tasks, such as preparing the next cylindrical fabric or operating other devices.

By the way, in the above sewing process, a signal such as a rubber catch release signal is generated when the number of stitches counted each time the sewing machine starts to drive reaches a predetermined number of stitches. The number of stitches can be set using a control device 60 as shown in FIG. This control device 6
0 is equipped with a display section 61, on which the process number and the number of stitches are displayed in parallel. The predetermined number of stitches is determined by pressing the process change button 62, displaying a number corresponding to the desired process, for example, the process from when the sewing machine is first driven until generating the rubber receiver signal, on the display section 61, and then selecting the number of stitches. Press the change buttons 63a and 63b to adjust the set number of stitches displayed on the display section 61 to the desired number of stitches, and when the number of stitches displayed finally reaches the desired number of stitches, press the setting button 64 to complete the setting. can do.

Alternatively, the desired number of stitches in the process can be set by driving the sewing machine with the process number displayed on the display section 61 and pressing the setting button 64 when the sewing machine reaches the desired number of rotations. be able to. If you set the number of stitches while driving the sewing machine in this way, you can manufacture many items of the same size according to the set value by adjusting the number of stitches while adjusting the number of stitches depending on the fabric to be sewn first. can do.

In the embodiment described above, the number of needle movements is counted every time the sewing machine starts driving, and when this count reaches a predetermined number, a rubber catch release signal and a rubber catch rise signal are generated. However, for example, the rubber receiving roller 2
Directly detects the beginning of sewing when it reaches a predetermined position such as the front,
The detection signal may be a rubber receiver removal signal or a rubber receiver rising signal, and the design of the means for generating the signal that provides the activation timing for moving the rubber receiver removal roller or the like can be arbitrarily changed.

Furthermore, the operating order of the rubber receiving and removing roller, the front and rear fabric tensioning rollers, or the rubber receiving roller can be changed as desired.

Further, in the embodiment, the rubber receiving roller 6 is raised from the first raised position to the second raised position when the sewing start portion reaches the vicinity of the upper part of the rubber receiving roller 6. If the annular rubber R and the cylindrical material C can be sewn in an acceptable state at the end of sewing even if the material C continues to pass below the guide member 31, the movement to the second raised position is not necessarily performed (but Good. In this case, the air cylinder 29 is deleted.

[Effects of the Invention] According to claims 1 to 5, sewing is completed simply by the operator setting the annular rubber and the cylindrical fabric and operating the start switch of the sewing machine. This has the effect of making it possible to perform other tasks, thereby significantly improving work efficiency.

Furthermore, since all the sewing is done automatically, the quality of the product can always be uniform and good.

According to the fifth aspect, in addition to the above effects, the sewing end portion of the annular rubber and the tubular fabric can be fed to the needle drop portion more smoothly.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of an annular rubber sewing device, Fig. 2 is an explanatory plan view showing rollers and guide members, Figs. 3A to 3D are schematic side views showing the sewing process, and Fig. 4 is a timing chart. FIG. 5 is a schematic side view illustrating the prior art. 1.2...Rubber catch and remove roller 3...Back fabric tension roller 5...Front tie tension roller 6...Rubber catch roller Patent applicant Pegasus Sewing Machine Manufacturing Co., Ltd. Apparel Machine Service Co., Ltd.

Claims (1)

[Claims] (1) By wrapping the annular rubber around multiple rollers,
This annular rubber can be set in a position where it passes through the needle drop with its circumferential direction matching the fabric feeding direction of the sewing machine.
In the annular rubber sewing device that can sew a set annular rubber to an end of a cylindrical fabric by operating a sewing machine, one of the plurality of rollers includes at least a roller immediately before the needle drop portion. The roller is a rubber receiving and removing roller located outside the cylindrical fabric to be sewn and retracts in a direction perpendicular to the fabric feeding direction when the sewing start portion reaches a predetermined position in front of the sewing start portion, and a fabric tensioning roller that is disposed inside the annular rubber wrapped around the plurality of rollers and that moves in a direction perpendicular to the axis to extend the annular rubber outward after the sewing start portion reaches the predetermined position; , the annular rubber is placed inside the annular rubber that is wrapped around the plurality of rollers and below the annular rubber that passes in front of the needle drop portion, and after the sewing start portion reaches the predetermined position, the annular rubber is attached to the cylindrical fabric. A sewing device for sewing an annular rubber, comprising: a rubber receiving roller which is raised above the throat plate surface of a sewing machine; (2) The fact that the sewing start portion has reached the predetermined position is known by a signal generated when a count of the number of stitches from the start of sewing reaches a predetermined value. Annular rubber sewing device. (3) The annular rubber sewing device according to claim 1, wherein the fact that the sewing start portion has reached the predetermined position is known by an output signal of a detector that detects the sewing start portion. . (4) The fabric tensioning roller performs the above movement in response to a signal indicating that the sewing start portion has reached the predetermined position, and the rubber receiving roller and the rubber receiving roller are retracted after a predetermined time has elapsed from the generation of the signal. 4. The annular rubber sewing device according to claim 2 or 3, wherein the annular rubber sewing device performs a lifting operation. (5) Sewing the annular rubber according to any one of claims 1 to 4, characterized in that there are two or more fabric tension rollers, at least a part of which also serves as a part of the plurality of rollers. Device. (6) A guide plate is provided in front of the needle drop section to correspond to the cutter that trims the edges of the cylindrical fabric, and below the cutter, a guide plate is provided to form a passage for guiding the cylindrical fabric between it and the throat plate. , and when the sewing start portion advances from the predetermined position to a second predetermined position before the needle drop portion, the rubber receiving roller further rises to lift the cylindrical fabric onto the guide plate. An annular rubber sewing device according to any one of claims 1 to 5.