JPH071105Y2 - Rubber tape sewing machine - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is applied, for example, to the hem finish of the hem mouth of briefs, shorts, etc. The present invention relates to a rubber tape sewing device configured to insert an elastic rubber tape into and to sew it together.

[0002]

2. Description of the Related Art Conventionally, a rubber tape is automatically inserted into a trumpet tape material while sewing a trumpet tape material to a hem opening of a brief, etc. A device for sewing a rubber tape adapted to simultaneously sew only the necessary parts is disclosed in, for example, Japanese Utility Model Publication No. 47-16281, Japanese Utility Model Publication No. 62-15033, and Japanese Utility Model Publication No. 54-6604. There is.

By the way, in this type of sewing, there is a means for inserting the rubber tape not only over the entire length of the trumpet tape cloth but only over a part of the trumpet tape cloth over a predetermined length range. To be taken. This is because, when inserted over the entire length, when the front body and the back body are sewn together after sewing, the rubber tapes at the sewn portions are overlapped with each other, resulting in bulkiness and poor wearing comfort and appearance. In this way, when inserting the rubber-like tape into only a part of the trumpet tape cloth over the predetermined length range, when the rubber tape having the predetermined length is inserted into the trumpet tape cloth, the rubber tape is inserted. It is necessary to cut the tape.

As a cutter for cutting such a rubber tape, Japanese Utility Model Publication No. 47-16281 discloses a cutter.
A model in which a lower blade is swung with respect to an upper blade by pulling a wire through a lever and a pulley in accordance with expansion and contraction operation of a cylinder arranged in a horizontal position is disclosed in Japanese Utility Model Publication No. 54-6604. In the gazette, a cylinder is provided on a side portion of a delivery guide for delivering and guiding the rubber tape from the upper side to the lower side with respect to the sewn portion, in a lateral position substantially orthogonal to the feeding direction of the rubber tape. Is installed, and the movable blade slides with respect to the fixed blade by the operation of this cylinder.

[0005]

Among the above-mentioned conventional techniques, the one disclosed in Japanese Utility Model Publication No. 47-16281 is:
The cutter is large. Therefore, in this publication, the operator monitors the supply state of the rubber tape, the insertion state of the rubber tape into the trumpet tape cloth, etc., as the supply form for the sewing portion of the rubber tape being supplied from the lower side to the upper side. In order to facilitate the supply from the upper part to the lower part of the sewing part, the cutter itself has to be placed in the front part of the sewing machine at the upper part of the sewing part.
A driving device such as a cylinder easily protrudes to the front side, and tends to interfere with the sewing work. Also, Jikkou 54-6, which adopts a form in which the rubber tape is fed downward from above.
In the one disclosed in Japanese Patent No. 604, the cylinder, which is the main component of the cutter driving device, projects largely to the side, which interferes with the sewing work and complicates the structure of connection with other components. There was a problem.

The present invention has been made in view of the above situation, in which the rubber tape is fed from the upper side to the lower side and is inserted into only a part of the trumpet tape material, and
When adopting the form in which only a part of the insertion length is sewn to the tape material, it is possible to make the whole as compact as possible by the rational arrangement of the respective drive devices and to facilitate the sewing work. An object of the present invention is to provide a sewing device for rubber tape.

[0007]

In order to achieve the above object, a rubber tape sewing device according to the invention of claim 1 of the present application is a trumpet which is fed to a sewing portion while deforming the tape material into a trumpet shape. Tape cloth feeding guide and a rubber tape fed downward from above the sewing portion so that the rubber tape is inserted into the trumpet tape material fed from the guide immediately before the sewing portion. When a predetermined amount of the rubber-like tape guide cylinders, which are vertically divided into two parts, which guide and move to the position immediately before the above-mentioned sewing part, and the rubber-like tapes which continuously move in these upper and lower guide cylinders are paid out, A cutter consisting of a rotating and fixed knife that cuts the rubber tape between the guide cylinders in a plane orthogonal to the feeding direction, and the rotating knife of this cutter is fixed A cutter driving device that slides against the thread, and a rubber tape that is fed from the lower guide tube of the upper and lower rubber tape guide tubes is fed to a sewing line and to a position outside the sewing line. A lower guide tube swinging drive device for swinging so as to switch to a state, the cutter drive device is arranged along the upper guide tube, and has a female shaft fixed to the lower end of the rotary knife, and the knife shaft. And a rotary actuator that has a rotary shaft that is parallel to the rotary shaft and that rotates the female shaft, and the lower guide tube swing drive device moves up and down along the side of the upper rubber tape guide tube. It is composed of a cylinder arranged in a directional posture and an intermediate oscillating body which oscillates around a horizontal axis in conjunction with expansion and contraction of the cylinder to oscillate the lower guide cylinder.

In the rubber tape sewing device according to the second aspect of the present invention, the knife shaft and the rotary shaft in the cutter device are connected by an eccentric mechanism, and the rotary knife is elastically fixed to the fixed knife. It is equipped with a spring that pushes the target.

Further, in the rubber tape sewing apparatus according to the third aspect of the invention, the upper and lower guide cylinders, the cutter, the cutter drive device and the lower guide cylinder swinging drive device serve as a rubber tape supply unit via the frame. The rubber-like tape supply unit is integrally formed and can be swingably switched between a sewing operation position near the front surface of the sewing machine head and a side standby position.

[0010]

According to the structure of the above-mentioned claim 1, in the trumpet tape material which is fed to the sewn portion while being deformed into the trumpet shape through the trumpet tape material feeding guide, the rubber piece is divided into upper and lower halves from above the sewn portion. By inserting a rubber tape that is cut down by a cutter when it is fed downward through the tape guide cylinder and fed out by a predetermined amount, it is possible to insert the rubber tape into only a part of the trumpet tape material. At the same time, by appropriately swinging the lower guide tube of the rubber tape guide tube, only the necessary parts such as both ends of the rubber tape to be inserted are sewn integrally.
Other parts can be partially sewn such as free.

By the way, the constituent elements of the cutter driving device and the lower guide tube swinging driving device, which are indispensable components for performing the partial insertion of the rubber tape and the partial sewing of the insertion tape as described above, namely, All of the rotary actuator that constitutes the cutter drive device, the female shaft with the rotary knife fixed to the lower end and the rotary shaft that is parallel to this, the cylinder that constitutes the lower guide tube swing drive device, and the intermediate swing body around the horizontal axis. By arranging in a vertical position along the side of the upper guide tube that is fixedly installed, it is possible to make the whole compact, and at the same time, the sewing work due to the large lateral protrusion of these components. Can get out of the way.

According to the second aspect of the present invention, the knife shaft and the rotary shaft of the cutter device are separated from each other, and the two shafts are connected by the eccentric mechanism so that the rotary knife has an axial play. The rotating knife can be slid in a state of being constantly pressed against the fixed knife by the elastic force of the spring.

Further, according to the third aspect of the invention, the rubber tape supply unit in which the upper and lower guide tubes, the cutter, the cutter driving device and the lower guide tube swinging driving device are integrated is provided on the side of the sewing machine head. By swinging and switching to the standby position, initial setting work of the rubber tape and maintenance such as maintenance / inspection of each component of the unit can be easily performed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of a rubber tape sewing apparatus according to the present invention. In the figure, 1 is a sewing machine, and a sewing machine arm 2 has a needle 3, a presser foot 4, and a material end for detecting the front end of a sewing machine arm 2. The sewing machine bed 6 is provided with a sensor 5 and the like, and a feed dog, a looper (not shown) and the like are arranged in the lower portion to form a sewing portion. Reference numeral 7 denotes a rubber tape supply unit. The supply unit 7 includes a sandwich type tape tension applying device 8, a feed roller 9, rubber tape guide cylinders 10 and 11 divided into upper and lower parts, a cutter 12, and a rubber tape pressing device. 13, a rubber tape detection sensor 14, a cutter drive device 15, and a drive device 16 for swinging the lower rubber tape guide tube 11, and a unit frame 17 thereof.
Is pivotally supported by the sewing machine arm 2 via a hinge 18, and is swingably switchable between a sewing operation position close to the front surface of the head of the sewing machine arm 2 and a side standby position.

Reference numeral 19 is a taper material feeding guide for the trumpet,
The tape material 20 is fed to the sewing portion while being deformed into a trumpet shape, and is fixedly supported on the front side of the sewing machine bed 6 via a bracket 21. Note that FIG.
In the figure, reference numeral 22 is a fastening fixture for fixing the rubber tape supply unit 7 at the sewing operation position.

FIG. 2 is an enlarged perspective view of an essential part of the rubber tape supply unit 7, in which a sandwich type tape tension applying device 8 is provided.
As shown in FIG. 6 and FIG. 6, the notch 25 for inserting the rubber tape 24 and the swing-out protrusions 26a to the left and right are formed on one outer surface of the base 23 having a substantially U-shaped plan view. 26a
The flat pressing plate 26 having the above is elastically pressed through the coil spring 27, and the rubber tape 24 is elastically sandwiched between the pressing plate 26 and the outer side surface of the base 23, so that the feed roller The rubber-like tape 24 fed by 9 is provided with a required tension. The nut 48 can be screwed to adjust the clamping force, that is, the tape tension, and the air cylinder 28 presses the rubber-like tape 24. The clamping force can be released.

The feed roller 9 is a drive roller 9A.
And a movable nip roller 9B and a driving roller 9A which can be brought into and out of contact with the driving roller 9A via an air cylinder 29.
And a tape feed motor 9C for driving. The tips of the air hoses 30 and 31 connected to a compressor (not shown) are downwardly connected to the upper portions of the rubber tape guide tubes 10 and 11 which are divided into the upper and lower parts, respectively. Each guide tube 1 from the tip
The rubber-like tape 24 fed by the feed roller 9 by ejecting air downward into the Nos. 0 and 11
Is configured to smoothly droop. Further, the tip end portion 11a of the lower guide cylinder 11 is bent so as to open toward the sewing portion, and the feeding guide 19 is provided.
It is shaped so that the rubber tape 24 can be inserted into the trumpet tape material 20A that is fed out from.

The cutter 12 includes the upper and lower guide cylinders 10 and 1.
It comprises a fixed knife 12A and a rotary knife 12B that are slidable relative to each other so that the rubber tape 24 is cut between the end faces of the rubber tape 24 in a plane orthogonal to the feeding direction. The drive device 15 of the cutter 12 is configured as follows. That is, in FIG. 2, reference numeral 32 denotes a forward / reverse switching rotary cylinder (an example of a rotary actuator, which may be a solenoid). ,
Bifurcated lever 34b, rotary knife shaft 34c, and rotary knife 1
Spring 34 for pressing 2B against fixed knife 12A
The eccentric mechanism 34 composed of d is interlocked with each other, and the rotary cylinder 32, the forward / reverse rotating shaft 33, and the eccentric mechanism 34 are sequentially arranged from the upper side to the lower side along the side portion of the upper guide cylinder 10, Cutter drive 1
5 are configured. In FIG. 2, 47 is a rear cutter for cutting the trumpet tape material 20A after sewing.

The rubber tape pressing device 13 is shown in FIG.
It is configured as specified in. In FIG. 3, 35
Is a rubber tape retainer composed of a spring plate, which is inserted into the lower guide cylinder 11 and has its upper end bent portion 35a.
It is swingably attached via. In this rubber tape holder 35, the spring 36 (FIG. 4), the air cylinder 38, and the tip portion 37a thereof are passed through the elongated window 39 formed on the side wall of the lower guide cylinder 11 to form the lower guide cylinder 11.
As shown in FIG. 4, a non-acting state in which the rubber tape 24 is separated from the rubber tape 24 via a presser bar 37 that is pivotally attached so as to move in and out of the inside of the rubber tape, as shown in FIG. It is configured such that a part of the tape-shaped tape 24 is elastically pressed against the inner surface of the lower guide cylinder 11 to be able to switch to a pressing action state in which the rubber-shaped tape 24 is given a feeding resistance. In addition, the attachment positions of the presser bar 37 and the air cylinder 38 are set to the long holes 40.
By vertically changing and fixing via the bolt 41, the pressing force of the rubber tape holder 35 against the rubber tape 24 can be adjusted. Also, a nut 38d attached to the piston rod 38a of the air cylinder 38
The pressing force can be adjusted also by the position of.

Further, the drive device 16 for swinging the lower guide cylinder 11 is constructed as shown in FIG. That is, in FIG. 3, reference numeral 42 denotes an air cylinder, which is arranged vertically along the side portion of the upper guide cylinder 10 and is fixedly supported by the upper guide cylinder 10 via a bracket 43 and a mounting plate 44. Reference numeral 45 denotes an intermediate rocking body pivotally supported by a mounting plate 44 via a horizontal shaft 46, the upper end of which is engaged and connected to the lower end of the movable piston rod 42a of the air cylinder 42. The lower guide tube 11 is fixed to the lower end portion, and the expansion and contraction of the air cylinder 42 causes the rubber tape 24 to be drawn out from the lower guide tube 11 to be drawn out on a predetermined sewing line and the position where the rubber tape 24 is out of the sewing line. It is configured to switch to a state in which it is fed out to.

Next, the operation of the above construction will be described with reference to the timing chart shown in FIG. 7, the sewing model diagram shown in FIG. 8 and the layout diagram of the operation amount setting operation panel shown in FIG. In the following description, the operation control is performed based on the count value N while counting the rotation signal of the sewing machine, that is, the number of hand movements.

First, in FIG. 7, D shows a period immediately after the trumpet tape material 20A is cut by the operation of the rear cutter 47 and the previous sewing operation of the rubber tape is completed. A time value (second) by the setter 50a for setting the tape insertion amount in the operation panel 50 shown in FIG. 9 is set to the time To for the preparatory work in which the tip end of the tape-shaped tape 24 projects from the detection position of the sensor 14 by a predetermined length.
, The nip roller 9B is brought into contact with the drive roller 9A by the contraction of the air cylinder 29, the tape feed motor 9C is operated, and the air hoses 30, 3 are connected.
By blowing air into the upper and lower guide cylinders 10 and 11 from 1, the rubber tape 24 is transferred over a predetermined length. During this time, the pressing plate 26 is separated from the outer surface of the base 23 against the spring 27 as the air cylinder 28 extends, and the rubber tape 24 is released from being held.

As described above, after the sensor 14 detects the tip end of the rubber tape 24 transferred by the feed roller 9 and the air blower, the tape 24 is kept for a set time To until it protrudes a predetermined length. Then, the tape feed motor 9C and the air blower are stopped, and the air cylinder 28 contracts to sandwich the rubber tape 24 and elastically move between the pressing plate 26 and the outer surface of the base 23 in the tape tension applying device 8. It is clamped, and the standby period A is entered. During the waiting period A, all operations are stopped.

From this state, the operation of the sewing machine 1 is started, the body cloth 49 is supplied onto the sewing machine bed 6, and this is supplied to the sensor 5
Is detected, the counting of the number of hands operated by the control unit is started and the sewing period B is started. When the count value reaches the numerical value N0 set in the tape feed start setter 50b of the operation panel 50 in FIG. 9, the tape feed motor 9C sets the set time T1, for example, 500 msec. The rubber tape 24 is inserted into the trumpet tape material 20A by being blown by air while being rotated for a while and the rubber tape 24 is slightly fed. After that, the air cylinder 29 is extended to separate the movable nip roller 9B from the drive roller 9A, and while the tape tension applying device 8 applies tension, the rubber tape 24 is pulled out by the sewing machine 1 and the length 11 along with the trumpet tape material 20A. Tape part 2 across
4A is sewn onto the body cloth 49.

During the sewing period B, when the count value reaches the numerical value N3 set in the lower guide tube swing start setter 50c of the operation panel 50 in FIG. The rubber tape 24 is attached to the lower guide tube 11 via the rocking body 45 by a predetermined sewing line L.
By switching so that the rubber tape 24 is fed to the place away from the inside, the insertion position of the rubber tape 24 with respect to the trumpet tape cloth 20A is shifted by ΔL, as shown in FIG.
The rubber tape portion 24B between the lengths 12 is free from the trumpet tape material 20A.

The count value is a numerical value set in the tape presser start setter 50d of the operation panel 50 of FIG. 9, that is, (N
1-N4), the air cylinder 28 of the tape tension applying device 8 is extended to separate the holding plate 26 from the outer surface of the base 23 to release the holding, and at the same time, the air cylinder in the rubber tape holding device 13 is released. 38 is extended, the rubber tape holder 35 is switched from the state shown in FIG. 4 to the state shown in FIG. 5 via the press rod 37, and the rubber tape 24 in the lower guide cylinder 11 is elastically pressed against the inner surface of the cylinder to be fed out. Add resistance.

Then, the operation panel 5 whose count value is shown in FIG.
When the number N1 set in the cutter operation start setter 50e at 0 is reached, the rotary cylinder 32 in the cutter drive device 15 is operated to turn the rotary knife 12B.
The rubber tape 24 is cut between the upper and lower guide tubes 10 and 11 by sliding the rubber tape 24 against the fixed knife 12A. With this cutting, the tape is released from the tension so that both ends of the cutting are suddenly pulled toward the presser foot 4 side of the sewing machine 1 and to the upper side. The tape 24 is pressed against the inner surface of the lower guide cylinder 11 by the presser 35 of the presser device 13,
Further, since the rubber tape 24 above the cutting point is released from the nipping between the pair of rollers 9A and 9B in the nipping tension applying device 8 and the feed roller 9, it is not drawn suddenly. In particular, the rubber tape 24 below the cutting point is kept in the above-mentioned pressing posture until the end thereof is fed to the lower part of the presser foot 4, and is reliably inserted over a predetermined range of the trumpet tape material 20A. It

After the above cutting, the setter 50 for lowering the swing of the lower guide tube in the operation panel 50 having the count value shown in FIG. 9 is used.
When the numerical value N2 set in f is reached, the air cylinder 42 is actuated to switch the lower guide cylinder 11 so that the rubber tape 24 after cutting is fed out on a predetermined sewing line L, whereby the final sewing is performed. Entering the landing section C, as shown in FIG. 8, a rubber tape portion 24 having a length of 13
C is sewn to the body cloth 49 together with the trumpet tape cloth 20A, and at the same time as the sewing is completed, the rear cutter 47 is operated by a sensor signal or manually to cut the trumpet tape cloth 20A.

In FIG. 9, 50g is an on / off switch of the drive device 16 for swinging the lower guide tube 11, 50h is an on / off switch of the material edge detecting sensor 5, and 50i. Is a manual button for feeding the tape, 50j is a manual button for operating the cutter driving device 15,
50k is a preset button, 50l is a reset button,
50 m is a power lamp.

If the entire tape supply unit 7 is swingably switchable between the sewing operation position and the side standby position as in the above embodiment, the initial setting work of the rubber tape 24 can be performed. Of course, maintenance such as maintenance and inspection of each component of the tape supply unit 7 is easy, but it may be fixed to the sewing operation position.

[0031]

According to the invention of claim 1, in the rubber tape sewing apparatus having the above-mentioned structure and action,
Each of the cutter and the lower guide tube swinging, which is indispensable for partially inserting and partially sewing the rubber tape supplied from the upper side to the lower tape-shaped tape material. By arranging the components of each of the drive devices in a vertical posture along the side portion of the upper guide cylinder, it is possible to make the entire device compact, including its peripheral portion,
Especially, it is not necessary to make the cylinder etc. project to the side greatly,
The predetermined sewing work can be performed easily and safely without disturbing the sewing work.

Further, according to the invention of claim 2, since the female shaft of the cutter driving device and the rotary shaft of the rotary actuator are separately connected through the eccentric mechanism, a play is provided between both shafts. , The rotating knife can be kept in pressure contact with the fixed knife by a spring,
Therefore, it is possible to reliably cut the rubber tape with the cutter.

Further, according to the third aspect of the invention, the rubber tape supply unit in which the upper and lower guide tubes, the cutter, the cutter driving device and the lower guide tube swinging driving device are integrated is provided on the side of the sewing machine head. By swinging and switching to the standby position, a sufficiently wide working space can be secured and the initial setting work of the rubber tape and maintenance such as maintenance and inspection of each component of the unit can be easily performed.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a rubber tape sewing device according to the present invention.

FIG. 2 is an enlarged perspective view of a main part of a rubber tape supply unit.

FIG. 3 is an enlarged side view of essential parts showing a rubber tape holding device and a lower rubber tape guide tube swinging drive device.

FIG. 4 is a vertical sectional view showing a non-acting state of the tape pressing device.

FIG. 5 is a vertical cross-sectional view showing an operating state of the tape pressing device.

FIG. 6 is an enlarged plan view of the tape tension applying device.

FIG. 7 is a timing chart for explaining the operation of the embodiment.

FIG. 8 is a sewing model diagram for explaining the operation of the embodiment.

FIG. 9 is a layout diagram of an operation panel.

[Explanation of symbols]

 3 needles 4 presser foot 7 rubber tape supply unit 8 pinch type tape tension applying device 9 feed roller 10 upper rubber tape guide tube 11 lower rubber tape guide tube 12 cutter 12A fixed knife 12B rotary knife 15 cutter drive device 16 Lower guide tube swing drive device 19 Wrapper tape material feeding guide 20 Tape material 24 Rubber tape 32 Rotary cylinder 33 Rotating shaft 34 Excene mechanism 34c Female shaft 34d Spring 42 Air cylinder 45 Intermediate rocker

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshikazu Kageyama, Inventor Yoshikazu Kageyama, 5-7-2 Sagishu, Fukushima-ku, Osaka-shi, Pegasus Sewing Machine Manufacturing Co., Ltd. (72) Akira Teranishi, Sagishu, Fukushima-ku, Osaka-shi, Osaka 5-7-2 Pegasus Sewing Machine Manufacturing Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A tape tape feed-out guide for a trumpet that is fed to a sewn portion while deforming the tape material into a trumpet shape, and a rubber tape is inserted into the trumpet-shaped tape material that is fed out from the guide immediately before the sewn portion. As described above, the rubber-like tape fed from the feed roller from above the sewn portion downward is guided to the position immediately before the sewn portion to guide the movement of the rubber-like tape, and the rubber-like tape guide tube is divided into upper and lower parts. A rotating and fixed knife that cuts the rubber tape between the upper and lower guide tubes in a plane perpendicular to the moving direction when a predetermined amount of the rubber tape that continuously moves in the guide tube is delivered. And a cutter driving device for sliding the rotating knife of the cutter with respect to the fixed knife, and the lower part of the upper and lower rubber tape guide tubes. The cutter drive is provided with a lower guide tube swinging drive device for swinging the guide tube so as to switch between a state in which the rubber tape drawn out from the guide tube is drawn out on the sewing line and a state in which the rubber tape is drawn out to a position outside the sewing line. The device is composed of a female shaft arranged along the upper guide cylinder and having the rotary knife fixed to the lower end, and a rotary actuator having a rotary shaft parallel to the female shaft and rotating the female shaft. At the same time, the lower guide tube swing drive device swings around a horizontal axis in conjunction with a cylinder arranged in a vertical posture along a side portion of the upper guide tube and swings around a horizontal axis to move the lower section. A rubber tape sewing device, comprising: an intermediate rocking body that rocks a guide tube. 2. The rubber tape according to claim 1, wherein the knife shaft and the rotary shaft in the cutter device are connected by an executor mechanism, and a spring for elastically pressing the rotary knife against the fixed knife is provided. Sewing machine. 3. An upper and lower guide cylinder, a cutter, a cutter drive device and a lower guide cylinder swing drive device are integrated as a rubber tape supply unit via a frame, and the rubber tape supply unit is the sewing machine head. 3. The device for sewing a rubber tape according to claim 1 or 2, which is configured to be swingably switchable between a sewing operation position close to the front surface of the front and a standby position on the side.