WO1999014418A1

WO1999014418A1 - Bobbin case replacing apparatus

Info

Publication number: WO1999014418A1
Application number: PCT/JP1998/002257
Authority: WO
Inventors: Haruhiko Kinoshita; Sei Kato
Original assignee: Kinoshita Precision Industrial Co., Ltd.
Priority date: 1997-09-18
Filing date: 1998-05-21
Publication date: 1999-03-25
Also published as: AU7450398A

Abstract

A bobbin case replacing apparatus (1) which is provided with carrying means (4) equipped with an indexing actuator (9) for carrying a replacing bobbin case (3) to the position of replacement; a chuck (5) for chucking the bobbin case (3); and chuck shifting means (6) provided with a swinging actuator (12) for rotating the chuck (5) toward a rotating shuttle (2) or the position of replacement, and a parallel shifting actuator (13) for moving the chuck (5) back and forth, and wherein the parallel shifting actuator (13) is horizontally disposed in the longitudinal direction of the sewing machine in parallel with the rotating axis of the rotating shuttle (2), and the indexing actuator (9) and the swinging actuator (12) are horizontally disposed in the lateral direction of the sewing machine. As a result, the bobbin case replacing apparatus (1) is made compact, reduced in the vertical dimension, and can be mounted on a sewing machine whose rotating shuttle (2) faces forward.

Description

Description Bobbin case changer Technical field

The present invention relates to a bobbin case exchanging device for exchanging a bobbin case mounted in a turning force machine of a sewing machine, and more particularly to a technique suitable for use in a type in which the turning force machine faces the front of the sewing machine. Background art

Textile products such as clothes are sewn by sewing machines that use bobbins wound around bobbins and put the bobbins in bobbin cases. The sewing machine that uses a bobbin case has a very small bobbin thread winding amount compared to the upper thread, so it is necessary to frequently change the bobbin case during sewing.

Disclosure of the invention

Therefore, the development of a device that automatically changes the bobbin case is underway. However, in the sewing machine in which the turning force machine is directed to the front, the space near the turning force machine at the lower portion of the sewing table is small, and the vertical dimension is particularly small. For this reason, there is no bobbin case exchange device that can be mounted on a sewing machine whose rotational force is directed to the front, and the development of a bobbin case exchange device that can be installed on such a sewing machine has been desired.

SUMMARY OF THE INVENTION An object of the present invention is to realize a compact bobbin casing that can be mounted on a sewing machine whose rotational force is directed to the front by realizing compactness and reducing the vertical dimension. To provide a switching device.

The bobbin case exchange device of the present invention employs the following technical means. The bobbin case changing device includes a conveying means for conveying the exchange bobbin case to the exchange position, a chuck for attaching and detaching the bobbin case, a chuck moving means for moving the chuck to the rotational force and the exchange position. Replace the bobbin case installed in the turning machine of the sewing machine.

The transporting means includes: an exchange cassette in which a plurality of bobbin cases are arranged at equal intervals in a ring; and a cassette rotation supporting the exchange cassette and having a rotation axis arranged in parallel with the rotation axis of the rotational force machine. A body, and an indexing device for rotating the cassette rotating body.

The chuck includes a chuck claw that causes a lock lever of the bobbin case, and a claw opening / closing actuator that drives the chuck claw.

The chuck moving means includes: a swinging actuator for moving the chuck against a bobbin case replacement position or the rotating force machine; and a chuck for moving the chuck with respect to a rotating shaft of the rotating force machine. And a parallel-moving actuator for driving in parallel.

The index actuating overnight, the nail opening / closing actuating overnight, the swinging actuating overnight, and the translation actuating overnight are fluid actuating overnight using a cylinder, respectively.

The cylinder of the translation actuator is arranged in parallel with the rotation axis of the rotational force machine,

The cylinders of the indexing actuator and the oscillating actuator are arranged orthogonally and horizontally with respect to the rotation axis of the rotational force. It is characterized by having.

By adopting the means of claim 1, the arrangement of each part of the bobbin case changing device can be rationalized, and the bobbin case changing device can be made compact. It can be installed not only on a sewing machine but also on a sewing machine with a rotating machine facing the front. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is a front view of the bobbin case changer showing the state of the swinging action extending.

FIG. 2 is a front view of the bobbin case changing device, showing a state in which the swinging actuator is retracted.

FIG. 3 is a top view of the bobbin case exchange device showing a state in which the translation factor is shrunk.

FIG. 4 is a top view of the bobbin case exchange device showing a state in which the translation factor is extended.

FIG. 5 is a rear view of the bobbin case changing device in a state where the indexing device has been extended.

FIG. 6 is a rear view of the bobbin case changing device in a state where the indexing tool has been contracted.

FIG. 7 is a bottom sectional view of the bobbin case changing device.

Explanation of reference numerals

1 ... bobbin case changing device 2 ... rotating force 3 ... bobbin case 3 a ... lock lever 4 ... transport means 5 ... chuck 6 ... chuck moving means 7 ... replacement cassette 8 ... cassette rotating body 9 ... indexing screw Best practice of the invention 1 1 ... Claw nail 1 1… Claw opening and closing 1 2… Pull swinging 1…

Next, embodiments of the present invention will be described based on examples and modifications.

[Configuration of Example]

FIGS. 1 to 7 show the embodiment. FIGS. 1 and 2 are front views of the bobbin case changing device, FIGS. 3 and 4 are top views of the bobbin case changing device, and FIGS. 5 and 6 are bobbin case changing devices. FIG. 7 is a bottom sectional view of the bobbin case changing device. Note that directions such as front and rear, left and right, and the like shown in this embodiment indicate directions viewed from the user side.

The bobbin case changing device 1 shown in this embodiment is a device in which a rotating force machine 2 is attached to a sewing machine facing the front, and a transfer means 4 for transferring a bobbin case 3 for replacement to a replacement position, and a bobbin case 3 A chuck 5 to be attached and detached, and chuck moving means 6 for moving the chuck 5 to a rotational force 2 and an exchange position are provided.

The transport means 4 includes an exchange cassette 7 in which four pobin cases 3 are arranged at equal intervals in an annular shape, and a rotation axis which detachably supports the exchange cassette 7 and is arranged in parallel with the rotation axis of the rotational force machine 2. A cassette rotating body 8 and an indexing tool 9 for rotating and driving the cassette rotating body 8.

The chuck 5 includes a chuck 10 that causes the lock lever 3 a of the bobbin case 3 and a hook opening / closing actuator 11 that drives the chuck 10. The chuck moving means 6 includes a swinging mechanism 1 and 2 for rotating the chuck 5 to a position opposite to the bobbin case 3 or a position opposing the rotational force 2 and a chuck 5 for rotating the chuck 5. And a parallel movement actuator 13 that is driven in parallel to the rotation axis.

The index actuator 9 and the nail opening and closing actuator 11, the swinging actuator 1 and 2 and the parallel movement actuator 1 and 3 are air actuators that are activated by the supply and discharge of the gears, respectively. is there.

Among them, the cylinder of the parallel movement actuator 13 is arranged in parallel to the rotation axis of the rotational force 2. In other words, the cylinders of the parallel movement actuator 13 are arranged horizontally in the front-rear direction of the sewing machine.

The cylinders of the indexing actuator 9 and the swinging actuator 12 are orthogonal to the rotation axis of the torque generator 2 and are horizontally arranged. In other words, the cylinders for the indexing actuator 9 and the swinging actuator 12 are arranged horizontally in the horizontal direction of the sewing machine.

Next, each part of the above-described bobbin case changing device 1 will be described individually.

(Description of replacement cassette 7)

The exchange cassette 7 includes four equally spaced bobbin mounting pins 21 extending forward, and each bobbin mounting pin 21 has a bobbin case 3 equipped with a bobbin (not shown) wound with a bobbin thread. It is provided so that it can be attached. The bobbin case 3 has a bobbin clamp (not shown) that fits into an annular recess provided in the bobbin mounting pin 21 and a bobbin clamp that is rotated with respect to the pobbin case 3 to slide the bobbin clamp. And a lock lever 3a for engaging and disengaging the bobbin clamp and the annular concave portion. The bobbin case 3 on which the bobbin is mounted is locked to the bobbin mounting pin 21 by fitting the bobbin clamp into the annular concave portion. .

The exchange cassette 7 is provided with a positioning recess 23 as shown in FIG. The positioning recesses 23 restrict the movement of the case projections 3 b protruding outward from the bobbin case 3, thereby restricting the directions of all the bobbin cases 3 mounted on the replacement cassette 7. .

The replacement cassette 7 is mounted on the rotating shaft 24 of the cassette rotating body 8 and rotates integrally with the force setting rotating body 8. The replacement cassette 7 has a positioning recess (not shown) formed therein, and is fitted to a positioning pin (not shown) provided on the rotating shaft 24 of the force-set rotating body 8. Then, the cassette rotating body 8 and the replacement cassette 7 are positioned.

(Explanation of cassette rotating body 8)

The cassette rotating body 8 is fixed at a lower portion of the sewing table B of the sewing machine in a space facing the rotating force machine 2, and is rotatably supported by a supporting plate 25 whose plane faces in the front-rear direction. Things. The support plate 25 has an L-shape, and the upper fixing portion 25 a is fixed to the lower surface of the sewing table B. The fixed portion 25a is provided so as to be able to move a small amount back and forth and left and right with respect to the sewing table B, and is provided so that the position of the support plate 25 with respect to the sewing table B can be finely adjusted. . That is, by finely adjusting the position of the support plate 25, the position of the cassette rotating body 8 with respect to the rotational force machine 2 can be finely adjusted.

The cassette rotating body 8 rotates through the supporting plate 25 and rotates on the rotating shaft 24 that rotates with respect to the supporting plate 25, and rotates behind the supporting plate 25. An indexing board 26 fixed to the rotating shaft 24 and rotating integrally with the rotating shaft 24 is provided.

On the back surface of the indexing board 26, four indexing feed pins 27 are provided. These four index feed pins 27 are provided at positions almost corresponding to the bobbin mounting pins 21 on the front side, and the index feed pins 27 screwed to the back of the index board 26 are circular. And four at equal intervals

Further, the cassette rotating body 8 is provided with a one-way clutch 28 for rotating the cassette rotating body 8 in only one direction. The one-way clutch 28 is composed of a resin belt 29 stretched around the indexing board 26 and a pull panel 30 that pulls only one end of the belt 29, and rotates the cassette. The rotation direction of the body 8 is restricted only in the direction of arrow A in FIG. In addition, by compressing the extension spring 30 with a finger, the rotating direction of the cassette rotating body 8 can be set freely, and maintenance can be easily performed.

In order to drive the cassette rotating body 8 in one direction by a predetermined angle by the operation of the indexing actuator 9, the indexing moving member 31 driven back and forth by the indexing actuator 9 has four moving members. An indexing claw made of a panel material that rotates the cassette rotating body 8 and the replacement cassette 7 in one direction by pushing over and pressing one of the indexing feeding pins 27 out of the indexing feeding pins 27 Is provided.

The indexing claw 32 is made of a leaf spring material and has a substantially L shape as shown in FIG. 7, and is driven in a horizontal direction (left and right direction) by an indexing tool 9. When the indexing tool 9 is extended and the indexing pawl 3 2 moves rightward, the cassette rotating body 8 Since the rightward rotation is prevented by 28, the indexing pawl 32 gets over the indexing feed pin 27. Next, when the indexing unit 9 is retracted and the indexing claws 32 move to the left, the leftward rotation of the cassette rotating body 8 is not blocked by the one-way clutch 28, and the indexing is performed. The pawl 32 presses the index feed pin 27 and rotates the index feed pin 27 90 °. As a result, the cassette rotating body 8 and the replacement cassette 7 rotate 90 °.

Also, the horizontal moving force of the indexing actuator 9 is transmitted to the indexing pawl 32, and the indexing moving member 31 contacts the indexing feed pin 27 when the indexing actuator 9 stops contracting. A rod-shaped restricting part 31a is provided to restrict the cassette rotating body 8 and the replacement cassette 7 from rotating to the left.

The indexing unit 9 expands and contracts due to the pressure of the air supplied and discharged inside, and is horizontally arranged on the back side of the support plate 25 as shown in FIG. The indexing actuator 9 is fixed to a support plate 25, and when it receives an air supply (positive pressure) from a compressor (not shown), it extends and moves the indexing moving member 31 to the right. When the internal pressure is exhausted (negative pressure), it contracts and moves the indexing moving member 31 to the left.

The air supply and discharge switching control to the indexing machine 9 is performed after the bobbin case 3 in the torque generator 2 is installed in the empty space of the replacement cassette 7 when replacing the bobbin thread. Things. (Description of chuck 5)

The chuck 5 is moved by a chuck moving means 6 for performing parallel movement in the front-rear direction and rotational movement. As shown in FIG. Chuck jaw 10 causing lock lever 3 a of case 3, pinching lock lever 3 a caused by this chuck jaw 10 with chuck jaw 10, and opening to bobbin mounting pin 21 of rotational force 2 A bobbin case fixing claw that holds the unlocked bobbin case 3 3 3 が r is provided.

The chuck jaw 10 is rotated in a direction to cause the lock lever 3 a by the operation of the jaw opening / closing function 11, and is restored to the original position by the jaw restoring panel 34.

When the chuck 5 removes the bobbin case 3 from the rotational force holder 2, the chuck pawl 10 is rotated by the pawl opening / closing actuator 1 1 in a direction to cause the lock lever 3 a to be released. When is mounted on the replacement cassette 7, it is restored by the nail restoration panel 34. Next, when the chuck 5 holds the bobbin case 3 of the replacement cassette 7, it is driven to rotate by the hook opening / closing actuator 11 in the direction of raising the lock lever 3a, thereby rotating the bobbin case 3. It is restored by the nail restoring panel 34 when it is mounted in the force 2. The switching control of the supply and discharge of air to and from the claw opening / closing function 11 is controlled by a control device so as to rotate the chuck claw 10.

(Explanation of chuck moving means 6)

As described above, the chuck moving means 6 moves the chuck 5 to the rotational force 2 and the exchange position, and performs the parallel translation of the chuck 5 in the front-rear direction and the rotational movement. More specifically, the chuck moving means 6 includes a swing slider 35 that enables the chuck 5 to move back and forth and rotates with respect to the plate 25, and a chuck supported by the swing slider 35. It is composed of a swing actuator 1 2 for rotating and driving 5 and a translation actuator 1 13 for driving the chuck 5 supported by the swing slider 3 5 in the front-rear direction.

The swinging actuator 12 extends to the left and right behind the support plate 25 and is fixed to the support plate 25, and the chuck 5 is driven in the front-rear direction by air lining. . Note that when the swinging motion 12 extends, the chuck 5 rotates to the exchange cassette 7 side (left rotation), and conversely, when the swinging motion 12 shrinks, the chuck 5 turns the rotational force 2 side. Rotate (clockwise).

The parallel movement actuator 13 extends in the front-to-back direction behind the support plate 25 and is fixed to the support plate 25, and drives the chuck 5 in the front-rear direction by supplying and discharging air. . When the parallel movement actuator 13 is extended, the chuck 5 moves far from the rotational position of the rotational force 2 or the exchange force set 7, and conversely, when the parallel movement actuator 13 contracts, the chuck is chucked. Numeral 5 is the one approaching the rotational position of the rotational force 2 or the exchange cassette 7.

The air supply and discharge switching control of the swinging actuator 1 and 2 and the paralleling actuator 1 and 3 is controlled by receiving the bobbin thread exchange signal. Air is discharged from the parallel moving machine 1 to 3 to catch the bobbin case 3 and the chuck 5 grips the bobbin case 3 in the rotating force holder 2 and then removes the bobbin case 3 from the rotating force holder 2 At the same time, air is supplied to the parallel-moving factory. Next, in order to move the bobbin case 3 taken out from the rotational force machine 2 to the replacement cassette 7 side, air is supplied to the swinging actuator 12. Next, replace bobbin case 3 After the parallel-movement actuator 13 was ejected to be mounted on the replacement cassette 7, the chuck 5 released the bobbin case 3 and then released the chuck 5 from the replacement cassette 7. Air is supplied to the parallel movement factory 13.

Next, when the replacement cassette 7 is rotated and the replacement bobbin case 3 is arranged at the replacement position, the air of the parallel movement actuator 13 is moved to grip the bobbin case 3 at the replacement position with the chuck 5. After discharging, the chuck 5 grips the bobbin case 3 of the replacement cassette 7 and then supplies air to the parallel movement actuator 13 to release the caught bobbin case 3 from the replacement cassette 7. Will be Next, in order to move the bobbin case 3 to the turning force 2 side,

12 Air is discharged. Next, in order to mount the bobbin case 3 in the torque generator 2, the air for the parallel movement actuator 13 is discharged, and after the chuck 5 releases the bobbin case 3, the chuck 5 is rotated. Air is supplied to the parallel movement factory 13 to move it away from 2.

(Operation of the embodiment)

Next, an example of the operation of the bobbin case changing device 1 in the present embodiment will be described.

(Preparation)

When the used bobbin case 3 is mounted in the torque generator 2, set the replacement cassette 7 whose replacement position is empty to the cassette rotating body 8. When the bobbin case 3 is not mounted in the torque generator 2, the replacement cassette 7 with the four bobbin cases 3 mounted is set on the cassette rotating body 8. (Replacement operation of bobbin thread)

Turn on the power of bobbin case changer 1. When the bobbin thread is to be replaced due to a decrease in the amount of bobbin thread or the like, the operation switch (not shown) is operated, and the bobbin case replacing device 1 performs the following operation.

1) The parallel moving actuator 13 shrinks, and the chuck 5 is moved toward the bobbin case 3 in the torque generator 2.

2) The hook opening / closing mechanism 11 of the chuck 5 is extended, and the chuck claw 10 causes the lock lever 3a of the bobbin case 3 held in the rotational force mechanism 2 to be chucked. 5 holds bobbin case 3 ο

3) The parallel movement actuator 13 is extended, and the chuck 5 is moved away from the rotational force 2.

4) The swinging actuator 12 extends, and the chuck 5 is rotated to the replacement cassette 7 side.

5) The parallel movement actuator 13 shrinks, and moves the chuck 5 toward the exchange position of the exchange force set 7. As a result, the bobbin of the bobbin case 3 held by the chuck 5 is mounted on the empty bobbin mounting pin 21.

6) The chuck opening and closing mechanism 11 of chuck 5 shrinks, and the action of the nail restoring spring 34 returns the chuck claw 10 to its original position. As a result, the lock lever 3a of the bobbin case 3 also returns to the original position, and the pobin case 3 is locked to the exchange force set 7.

7) The parallel movement actuator 13 is extended, and the chuck 5 is moved away from the exchange force set 7.

8) The indexing tool 9 is extended and contracted, and the cassette is turned. Rotate the roller 8 by 90 ° and place the replacement bobbin case 3 at the replacement position.

9) The parallel moving actuator 13 shrinks, and moves the chuck 5 toward the exchange position.

1 0) The hook opening / closing mechanism 1 1 of chuck 5 is extended, and the chuck claw 10 raises the lock lever of the bobbin case 3 located at the replacement position — 3 a, and the chuck is opened. 5 holds bobbin case 3.

1 1) The parallel movement actuator 13 is extended, and the chuck 5 is moved away from the cassette 7.

1 2) The swinging actuator 1 2 shrinks, and the chuck 5 is rotated to the turning force 2 side.

1 3) The parallel movement actuator 13 shrinks, and moves the chuck 5 toward the rotating force 2. As a result, the bobbin case 3 held by the chuck 5 is mounted in the torque generator 2.

1 4) The chuck opening and closing mechanism 1 1 of chuck 5 shrinks, and the nail restoring panel 34 returns the chuck claw 10 to its original position. As a result, the lock lever 3a of the bobbin case 3 is also returned to the original position, and the bobbin case 3 is snapped in the torque M2.

1 5) The parallel movement actuator 13 is extended, and the chuck 5 is moved away from the rotation force 2.

With the above operation, the replacement work of the bobbin case 3 is completed. [Effects of the embodiment]

The bobbin case changing device 1 of the present embodiment can automatically change the bobbin case 3 by the above operation.

The cylinder of the actuator for parallel movement 1 to 3 is the rotation axis of the torque 2 The cylinders of the indexing unit 9 and the swinging unit 12 are orthogonal to the rotation axis of the rotational force 2 and are horizontally arranged, so that the bobbin case is replaced. Each part of the device 1 can be arranged reasonably. For this reason, the bobbin case changing device 1 can be made compact and the vertical dimension can be reduced, and as a result, the bobbin case changing device 1 can be easily mounted on a sewing machine in which the rotational force machine 2 faces the front. .

(Modification)

Although the example in which the bobbin case exchange device is mounted on a sewing machine in which the rotational force machine is directed to the front is shown, it may be mounted on a lockstitch machine or the like in which the rotational force machine is directed to the side.

Although the example in which the number of bobbin cases mounted on the replacement cassette is four is shown, it can be changed according to the application.

Although an example in which the actuary is used as each actuating unit is shown, other actuating units such as a servomotor may be used.

Claims

The scope of the claims

1. A transport means for transporting the exchange bobbin case to the exchange position, a chuck for attaching and detaching the bobbin case, and a chuck moving means for moving the chuck to the rotational position and the exchange position,

In a bobbin case exchange device for exchanging a bobbin case installed in a turning force machine of a sewing machine,

The transporting means includes: an exchange cassette in which a plurality of bobbin cases are arranged at equal intervals in a ring; and a cassette rotation supporting the exchange cassette and having a rotation axis arranged in parallel with the rotation axis of the rotational force machine. A body and an indexing unit for rotating the cassette rotating body.

The chuck includes a chuck claw that causes a lock lever of a bobbin case, and a claw opening / closing actuator that drives the chuck claw.

The chuck moving means includes a swinging actuator for moving the chuck against a bobbin case replacement position or the rotating force, and a parallel driving mechanism for driving the chuck in parallel to a rotation axis of the rotating force. Prepare for the event

The cylinders of the indexing actuator and the oscillating actuator are arranged orthogonally and horizontally with respect to the rotation axis of the rotational force. A bobbin case exchange device characterized by the following.