JPH0420639B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an edge folding device for folding the edges of a work cloth.

[Prior Art] Conventionally, as this type of device, for example, the
The one disclosed in Publication No. 5115 is known. This device alternately repeats the folding of the edge of the work cloth by the cooperation of the guide member and the operating member and the feeding of the work cloth by the feed foot, and processes the work cloth along the feed line while sequentially folding the edge of the work cloth. It is designed to transport cloth.

[Problems to be Solved by the Invention] However, in the conventional device described above, the feed foot is provided on the cloth feeding side rather than the guide member, etc., and the work cloth folded by the guide member and the actuating member is not placed on the work surface. The cloth is configured to be transferred in a predetermined cloth feeding direction while being pressed by a feeding foot. For this reason, after bending one side of the fabric, when attempting to fold the other side of the fabric, the worker must reset the fabric into the machine, resulting in poor work efficiency. There's a problem. . Further, in the conventional apparatus, the edges of the work cloth are simply folded, and depending on the material of the work cloth, there is a problem in that the folded portion of the work cloth may return to its original position. This becomes noticeable when the work cloth is bent into a curved shape along the outer peripheral edge.

This invention was made in order to solve the above-mentioned problems, and its purpose is to improve the workability when sequentially folding the fabric along the outer periphery, even if the outer periphery has a curved shape. To provide an edge folding device for work cloth in which the folded part does not return even when folding is performed.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a folding head that folds a part of the outer peripheral edge of a work cloth held by a cloth holding means, and a folding head feeding means for relatively moving the folding head along the outer circumferential edge of the fabric to the next folding position after folding a part of the outer circumferential edge of the fabric; A work cloth edge folding device configured to repeat folding of the work cloth and movement of the folding head, wherein the folding head is formed with a notch, and the cloth holding means is provided with a cutout. a cloth support plate on which the outer peripheral edge of the held work cloth is placed so as to cover the notch; a folding guide having an action portion capable of pressing the work cloth at a position adjacent to the notch; and the cloth support plate. The folding position is movable between a retracted position where the cloth is retracted into the notch and a folding position where the folding position overlaps with the upper surface of the working portion of the folding guide that presses the workpiece cloth, and the outer peripheral edge of the workpiece cloth is placed under the action of the folding guide. a folding plate that is bent above the folding plate, and a folding plate that is arranged to be movable up and down on the delivery side of the work cloth from the folding guide, and presses the folded part of the work cloth that has been folded by the folding guide and the folding plate. between an ultrasonic vibrator that applies ultrasonic vibration to iron the folded portion of the work cloth, a pressing position that overlaps the upper surface of the working part of the folding guide, and a spaced position that is spaced apart from the working part. A movable auxiliary holding plate and the folding plate are moved from the retracted position to the folding position to bend a part of the outer peripheral edge of the work cloth onto the upper surface of the folding guide, and the ultrasonic vibration is applied to the folding plate. a folded plate driving means for returning the folded plate from the folded position to the retracted position after the ironing by the child is completed and before the folding head is moved by the folding head feeding means;
When the folding plate is moved from the folding position to the retracted position by the folding plate driving means, the auxiliary presser plate is moved to the pressing position, and the auxiliary presser plate is moved before the folding plate is moved from the retracted position to the folding position. and auxiliary presser plate driving means for moving the presser plate to the separated position.

[Function] In the present invention having the above configuration, the outer peripheral edge of the work cloth held by the cloth holding means is placed on the cloth support plate of the bending head so as to cover the notch. The folding plate driving means moves the folding plate from the retracted position to the folding position, and folds a part of the outer peripheral edge of the work cloth covering the notch onto the upper surface of the folding guide. When this bending is performed, the ultrasonic vibrator presses the folded part of the work cloth that has just been folded to iron it, and then the folding plate driving means moves the folding plate from the folded position to the retracted position. When the folding head is moved, the folding head feeding means moves the folding head along the outer peripheral edge of the work cloth to the next folding position, and the folding operation is performed again. During this bending operation, the auxiliary presser plate driving means moves the auxiliary presser plate to the pressing position when the folding plate is moved from the folding position to the retracted position, and the auxiliary presser plate is moved from the retracted position to the folding position. The auxiliary presser plate is moved to the separated position before being moved. That is, when the folding head is moved, that is, when the folding plate is moved to the retracted position, the auxiliary presser plate presses the folded part of the work cloth against the upper surface of the folding guide to fold it. This prevents the folded portion from returning to its original shape, and the folded portion of the work cloth, which is held folded by the movement of the folding head, is transferred to the pressing area by the ultrasonic vibrator.

[Example] Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of this edge folding device. A transport board 3 is supported on a base 1 so as to be able to reciprocate on a pair of guide rails 2 extending in parallel along the Y direction. A male threaded rod 4 extending parallel to both guide rails 2 is rotatably disposed on the base 1, and a portion of the rod 4 is screwed into a female threaded portion (not shown) provided on the lower side of the transport board 3. are combined. Further, one end of the male threaded rod 4 is drivingly connected to a Y-direction conveyance motor 5 attached to the base 1. Then, the male threaded rod 4 is rotated in forward and reverse directions based on the drive of the Y-direction conveyance motor 5.
The transport board 3 is reciprocated on the guide rail 2 in the Y direction.

A transport block 7 is supported on the transport board 3 so as to be reciprocally movable through a pair of guide rods 6 extending perpendicularly to the guide rail 2, that is, extending in the X direction perpendicular to the Y direction. A male threaded rod 8 extending parallel to the guide rods 6 is rotatably disposed between the two guide rods 6, and is screwed onto the conveying block 7. Also, one end of the male threaded rod 8 is connected to a motor 9 for conveying in the X direction attached to the conveying board 3.
The drive is connected to the Then, the male threaded rod 8 is rotated in forward and reverse directions based on the drive of the X-direction conveyance motor 9, so that the conveyance block 7 is moved toward the guide rod 6.
It is reciprocated in the X direction on the top.

A motor 10 for rotation in the θ direction is fixed on the transport block 7. On this motor 10 for rotation in the θ direction, an edge bending head 11 consisting of a machine frame 31 equipped with an edge bending mechanism etc. that is operated to bend a predetermined area of the edge Wa of the work cloth W is mounted as a base. 12.

The motor 10 for rotation in the θ direction is a well-known high-performance DD motor without a speed reduction mechanism, and is connected to the base 12.
is fixed to an output part that is rotatable in the θ direction.
Then, by driving the motor 10 for rotation in the θ direction, the edge bending head 11 is rotated along with the base 12 in the θ direction.
rotated in the direction.

As described above, the bending head feeding means is constituted by the transport board 3, the motor 5 for transporting in the Y direction, the transport block 7, the motor 9 for transporting in the X direction, the base 12, the motor 10 for rotating in the θ direction, etc. Based on the movement of the transport block 7 and the rotation of the base 12, the edge bending head 11 is moved in the Y direction or the X direction and also rotated in the θ direction.

On the other hand, in the vicinity of the base 1, a cloth clamp 13 is provided as cloth holding means for holding the work cloth W. This cloth clamp 13 is the lower plate 13
a and an upper plate 13b, and is attached to a movable support frame 14. That is, the lower plate 13a is horizontally supported and fixed to the support frame 14. or. The upper plate 13b is attached to the lower plate 13a at its base end shaft support 13c so as to be rotatable upward, and is crimped to the lower plate 13a by a biasing member (not shown).

In order to hold the work cloth W in the cloth clamp 13, the upper plate 13b is rotated upward, and both plates 13
The work cloth W is held between a and 13b. Further, in order to bend a predetermined area of the edge Wa of the held work cloth W, the support frame 14 is moved so that the cloth clamp 13 faces the edge bending head 11, as shown in FIG. Then, the edge Wa of the work cloth W is set in the edge folding head 11. In this set state, the cloth clamp 13 is fixed at the same position, and only the edge bending head 11 is moved along the edge Wa of the work cloth W.

Next, the edge bending mechanism assembled to the edge bending head 11 will be explained.

3 to 7 are diagrams showing the configuration of the edge bending mechanism and its series of operations. The edge bending mechanism is assembled to the machine frame 31, and the work cloth W held by the cloth clamp 13
A fixed plate-shaped anvil (fabric support plate) 21 is provided to receive the edge Wa of the work cloth W, and the upper surface thereof serves as a reference support surface S for supporting the work cloth W. or,
One side edge 21a of the anvil 21 has a notched recess 21b.
is formed.

A folding guide 22 made of a thin plate and having a substantially L-shaped cross section is disposed above the anvil 21 so as to be movable up and down. The folding guide 22 is drivingly connected to a folding guide drive cam (not shown), and is moved up and down based on the operation of the drive cam. Further, the tip of this folding guide 22 serves as a working portion 23 that holds the work cloth W between it and the anvil 21, and its tip edge 23a serves as a guide that forms a crease when the edge Wa of the work cloth W is folded. It acts as. A filamentous adhesive J drawn out from a supply nozzle 24 disposed above the anvil 21 passes through the through hole 23b formed in the working part 23, and its tip protrudes to the side of the working part 23. has been done.

Further, a notch 22a is formed in the folding guide 22 and continues upward from a part of the action portion 23, and a presser member 25 having a substantially L-shaped cross section is disposed corresponding to the notch 22a so as to be movable up and down. ing. This presser member 25 is drivingly connected to a presser member drive cam (not shown), and is moved up and down based on the operation of the drive cam. The movement of the work cloth W is regulated by the tip of the presser member 25 auxiliary pressing a part of the work cloth W through the notch 22a.

Furthermore, a spatula-shaped folded plate 26 is movably disposed corresponding to the notch recess 21b of the anvil 21. This folding plate 26 is drivingly connected to a folding plate driving cam (not shown), and is moved along a predetermined path based on the operation of the driving cam. That is, folded plate 2
6, the distal end of the anvil 21 moves from the retracted position below the anvil 21 as shown by the solid line in FIGS. 3 and 7.
The fourth,
The folding guide 22 is moved to the operating (folding) position shown by the two-dot chain line in FIGS.
It is returned to the retracted position shown by the solid line in FIG.

The anvil 21, the folding guide 22, the folding plate 26, etc. constitute a folding means for folding a predetermined area of the edge Wa of the work cloth W held by the cloth clamp 13. Guide 22
The edge portion Wa of the work cloth W held under pressure between the folding plate 26 and the pressing member 25 is folded in by a series of movements of the folding plate 26 from the retracted position to the use position.

Further, above the anvil 21, there is an output horn 2 of an ultrasonic transducer main body 28 constituting the ultrasonic bonding device.
9 is arranged to be movable up and down. That is, the output horn 29 of the ultrasonic transducer main body 28 is the third,
4, 6, and 7, and the folding guide 2 is moved away from the anvil 21 as shown in FIG.
2 and an operating position close to the anvil 21 via the work cloth W on the side of the folded plate 26 so as to be vertically movable.

The ultrasonic bonding device in this embodiment includes a high-frequency oscillator 27 (see Fig. 18), a resonant type vibrator 29a (see Fig. 18) that converts the vibration into ultrasonic vibration, and a high-frequency oscillator 29a (see Fig. 18) that amplifies the ultrasonic vibration. an ultrasonic transducer main body 2 equipped with an output horn 29 that transmits
8, an anvil 21 disposed opposite to the output horn 29, and a pressurizing device for moving the main body 28 toward the anvil 21. The high frequency oscillator 27 and the resonant type vibrator 29a are connected to the main body 28.
The output horn 29 is built in from the main body 28.
is protruding downward. When the output horn 29 is moved from the retracted position to the working position, it comes into contact with the workpiece cloth W, and in this contact state, the high frequency oscillator 27 is activated, so that there is a gap between the cloth and the cloth at the contact part. A certain thread-like adhesive J is made to generate heat, and the thread-like adhesive J having a low melting point is melted and bonded, and at the same time, creases are formed on the work cloth W by the ironing effect.

Further, above the anvil 21, the tip of a blowing nozzle 30 for blowing out air for cooling is disposed so as to face downward. This blow-off nozzle 30 is provided to quickly cool the filamentous adhesive J melted by the heating of the output horn 29, and the air drawn out from the air compressor (not shown) is supplied to the air blow-out control solenoid valve 78 (the 18th (see figure).

Further, above the anvil 21, there is a blow-off nozzle 30.
The folded edge synchronizes with the air blowing from
A holding plate 16 serving as an auxiliary holding plate for auxiliary pressing and holding of Wa is arranged to be movable up and down.

As shown in FIG. 8, the holding plate 16 is attached to the machine frame 31
It is attached to the tip of an actuating piece 18 which is rotatably supported around a support shaft 18a by a bracket 17 attached to the actuator. In the middle part of this actuating piece 18,
An output shaft 19a of a holding plate actuator 19 attached to the bracket 17 is connected. Then, based on the operation of the retaining plate actuator 19, its output shaft 19a is moved upward, so that the actuating piece 18 is rotated upward and the retaining plate 16 is moved to the anvil 2.
1 is placed at a retreat (separated) position away from 1.
Further, as the output shaft 19a is moved downward, the actuating piece 18 is rotated downward, and the holding plate 16 is placed close to the anvil 21 in an action (pressing) position for holding the work cloth W under pressure. In this operating position, a certain amount of clearance is formed between the retaining plate 16 and the reference support surface S of the anvil 21.

Next, an adhesive supply mechanism for feeding out the filamentous adhesive J will be explained.

FIG. 9 is a diagram showing the configuration of the adhesive supply mechanism. A base end portion of an actuating member 32 is rotatably supported by a portion of the machine frame 31 of the edge bending head 11 via a support shaft 31a. An adhesive supply device 33 is attached to the operating member 32, and the supply nozzle 24 is attached to the lower side of the adhesive supply device 33. or,
A bobbin 34 around which a predetermined amount of thread-like adhesive J is wound is rotatably supported on the upper part of the machine frame 31. Then, the thread-like adhesive J wound around the bobbin 34
One end of the adhesive passes through the adhesive supply device 33 and is led out from the tip of the supply nozzle 24 .

Also, in order to rotate the operating member 32, the machine frame 3
1 is provided with a rotatable actuating member drive cam 40, and a cam follower 41 that engages with the cam 40 and is actuated is rotatably attached via a support shaft 42. The tip of the arm portion 41a of this cam follower 41 is connected to the actuating member 32. and,
When the actuating member drive cam 40 is rotated, the cam follower 41 is actuated and the arm portion 41 is actuated.
The actuating member 32 is reciprocated in the vertical direction by a,
A supply nozzle 24 attached to an adhesive supply device 33 is reciprocated along one side edge 21a of the anvil 21. This operation is performed to stretch and cut the thread-like adhesive J, and by the movement of the supply nozzle 24, it is drawn out from the supply nozzle 24 and placed at a predetermined position at the tip of the thread-like adhesive J melt-bonded to the cloth. The tension is applied and the cutting is performed.

Further, as shown in FIG. 10, an adhesive supply device 33
has a hollow part 33a inside, and a cylindrical piston 35 is slidably assembled in the hollow part 33a. A compression spring 36 is interposed between the piston 35 and the small diameter portion 33b of the hollow portion 33a. Further, the tip of the piston 35 is coated with a thread-like adhesive J.
A well-known collector chuck 37 for gripping is attached, and an annular sleeve 38 is fitted to the tip of the chuck 37. This sleeve 3
8 indicates the lower end surface of the small diameter portion 33b and the small diameter portion 33b.
Movement is restricted between the step part 33c formed below.

The filamentous adhesive J introduced into the hollow portion 33a passes through the piston 35 and the collect chuck 37 and is led out through the supply nozzle 24. Further, an air hole 33d is formed on the base end side of the adhesive supply device 33, through which compressed air is introduced in order to press and move the piston 35. An air connector 39 is connected to this air hole 33d as shown in FIG. 9, and an adhesive supply control solenoid valve 79 (first
Compressed air is supplied through the pump (see Figure 8).

Therefore, by introducing compressed air into the hollow portion 33a, the piston 35 is pressed downward against the spring force of the compression spring 36, as shown by the two-dot chain line in FIG. Collection check 3
7 is pressed downward while holding the filamentous adhesive J. At this time, the movement of the sleeve 38 is restricted by the stepped portion 33c, and only further movement of the collect chuck 37 is allowed, the tip thereof opens, and the grip of the thread-like adhesive J by the collect chuck 37 is temporarily released. Thereafter, the introduction of compressed air is stopped and the compressed air in the hollow portion 33a is discharged, so that the piston 35, the collection chuck 37, and the sleeve 38 return to the positions shown by solid lines in FIG. It is gripped again by the collection chuck 37. By repeating this cycle, the filamentous adhesive J is supplied in predetermined amounts.

Next, a mechanism for vertically moving the ultrasonic transducer main body 28 and a mechanism for adjusting its operating position will be explained.

FIG. 11 is a diagram showing the configuration of this vertical movement mechanism and operating position adjustment mechanism. The machine frame 31 has a flat surface that supports the ultrasonic transducer main body 28 in a vertically movable manner.
A shaped guide member 46 is attached. or,
Below this guide member 46, two pairs of guide rollers 47 are arranged at a predetermined interval. A pair of guide plates 48 attached to the side surfaces of the ultrasonic transducer main body 28 are connected to the guide roller 4.
7, the vertical movement of the main body 28 is smoothly guided.

Further, in order to move the ultrasonic transducer main body 28 up and down, a main body drive cam 49 is rotatably attached to the machine frame 31, and an arm-shaped cam follower 50 is engaged with the cam 49 and operated. is provided. That is, a cam groove 49a is formed on the side surface of the main body drive cam 49.
A guide pin 50a protruding from the center of the cam follower 50 is slidably assembled in the cam groove 49a. Further, a bifurcated engagement recess 50b is formed at the tip of the cam follower 50, and the engagement recess 50b engages the die 51 against the engagement pin 28a protruding from the side surface of the ultrasonic transducer main body 28. are rotatably connected through the

Furthermore, as shown in FIGS. 11 and 12, the base end of the cam follower 50 protrudes laterally and has a cam follower 5.
A center pin 50c is provided that forms the rotation center of 0. An adjusting die 52 having a female screw hole 52a passing through the center pin 50c in the vertical direction is rotatably attached to the center pin 50c. Further, an adjusting actuator 54 consisting of a servo motor is attached to the machine frame 31 via a bracket 53, and its male-threaded output shaft 54a is screwed into the female-threaded hole 52a of the adjusting die 52. Then, as the main body drive cam 49 is rotated, the cam follower 50
is rotated about the center pin 50c, and the main body 28 is moved up and down based on the engagement between the engagement recess 50b on the distal end side and the engagement pin 28a of the ultrasonic transducer main body 28. With this, the ultrasonic transducer main body 28
The output horn 29 is reciprocated between an active position where it contacts the work cloth W and a retracted position where it separates from the work cloth W.

Further, by operating the adjusting actuator 54, the adjusting die 52 is moved up and down along the output shaft 54a based on the screw engagement between the male threaded output shaft 54a and the female threaded hole 52a, and the adjusting die 52 is moved up and down along the output shaft 54a.
The vertical position of 2 is changed. Based on this change in the vertical position of the adjusting die 52, the cam follower 50
The position of the center pin 50c, that is, the position of the center of rotation of the cam follower 50 is changed, and the operating position of the output horn 29 when it is moved up and down by the rotation of the cam follower 50 is changed up and down. That is, in this embodiment, when the ultrasonic transducer body 28 is moved up and down, the amount of vertical movement of the output horn 29 is always constant;
Based on the operation of the adjusting actuator 54, only the operating position of the output horn 29, that is, the distance G between the reference support surface S of the anvil 21 and the lower end surface of the output horn 29, as shown in FIG. 11, is adjusted. As a result, the contact pressure of the output horn 29 against the workpiece cloth W can be adjusted in accordance with the thickness of the workpiece cloth W, and the heat generation state of the cloth itself due to ultrasonic vibration can be changed and set as appropriate.

Next, a description will be given of a curved fold assisting mechanism for handling folds that occur when the curved edge Wa is folded.

FIG. 13 is a diagram showing the configuration of the curved folding assisting mechanism. In the vicinity of the anvil 21, a frame member 58 is supported by a bracket 56 provided on the machine frame 31 via a support shaft 57 so as to be rotatable in the vertical direction. A position adjustment actuator 59 is attached to the frame member 58, and a fold guide 60 having an earpick-shaped tip is attached to the tip of its output shaft 59a. Based on the expansion and contraction of the output shaft 59a of the position adjustment actuator 59, the fold guide 6
The protruding position of the tip of 0 is adjusted.

Further, above the frame member 58, an operating member 63 is supported so as to be rotatable in the vertical direction via a support shaft 62 at the lower end of a position adjustment link 61 which is vertically movable. A fold presser 64 is attached to the lower surface of the distal end side of the actuating member 63 and extends downward and has an earpick-shaped distal end. A connecting arm 65 extending downward is rotatably connected to the operating member 63 via a support shaft 66, and the lower end of the arm 65 is connected to the frame member 58.
are rotatably connected via a support shaft 67 on the side surface. Further, the support shaft 66 is connected to a cam follower 69, and the upper end of the cam follower 69 is drivingly connected to a not-shown pleat presser driving cam.

As mentioned above, each support shaft 57, 62, 6
Each member 58, 6 connected to each other at 6, 67
3 and 65 constitute a series of link mechanisms, and each member 58, 63, 65 is operated in conjunction with each other. That is, as the cam follower 69 is moved up and down based on the operation of the fold presser driving cam, the operating member 63
is rotated around the support shaft 62, and as a result, the fold presser 64 has a retracted position where it is separated from the anvil 21 as shown by a solid line in FIG. It is arranged to switch between. At this time, the frame member 58 is rotated via the connecting arm 65, and as a result, the fold guide 60 moves to a retracted position where it is separated from the anvil 21 as shown by a solid line in FIG. 21 and an operating position adjacent to the operating position. In other words, the pleat presser 64 and the pleat guide 60 are
In order to deal with folds Wb that occur when bending the curved work cloth W as shown in FIG. 7, the upper retracted position of the work cloth W and the first
As shown in FIGS. 5 and 17, the actuating position for pressing the work cloth W is switched and arranged substantially synchronously.

In this embodiment, the pleat presser 64 acts only when bending the curved edge Wa, and in order to prevent the pleat presser 64 from coming into contact with the work cloth W when folding the straight edge Wa. , position adjustment link 6
1 is arranged so as to be movable upward. A position adjustment actuator 68 (see FIG. 18) that is driven to move it upward is provided.
Further, when adjusting the position of the pleat presser 64, the actuator 59 for adjusting the position of the pleat guide 60 is operated, that is, the output shaft 59a is contracted, and the pleat guide 60 is moved.
0 does not come into contact with the work cloth W.

Next, the electrical configuration of the edge folding device of this embodiment will be explained with reference to the block diagram of FIG.

A microcomputer 71 as a control means has a central processing unit (hereinafter referred to as "CPU") 72,
It consists of a read-only memory (ROM) 73 that stores control programs for edge bending of work cloths of various shapes, and a readable and rewritable memory (RAM) 74 that temporarily stores arithmetic processing results, etc.
The CPU 72 operates based on program data stored in the ROM 73.

The CPU 72 outputs control signals to the motors 5, 9, 10, the adjustment actuator 54, the holding plate actuator 19, the high frequency oscillator 27, and the position adjustment actuators 59, 68 via the input/output interface 75.

Further, the CPU 72 outputs control signals to the cam drive motor 77 provided in the edge bending head 11 via the input/output interface 75 in order to drive the various drive cams. In this embodiment, the various driving cams, that is, the folding guide driving cam, the pressing member driving cam, the folding plate driving cam, the pleating holding driving cam, the operating member driving cam 40, and the main body driving cam 49 are as described above. They are each driven based on the rotation of a camshaft (not shown) operated by a cam drive motor 77.

Furthermore, in order to control the air blowing from the supply nozzle 24, the CPU 72 outputs a control signal via the input/output interface 75 to an air blowing control solenoid valve 78 that controls compressed air from the air compressor. . Similarly, the CPU 72 controls the input/output interface 75 of the adhesive supply control solenoid valve 79 that controls the compressed air from the air compressor in order to control the delivery of the filamentous adhesive J from the adhesive supply device 33. Outputs control signals via.

Further, in order to detect the rotation angle of the camshaft, the CPU 72 receives information from the input/output interface 7 from a well-known reference pulse sensor 80 installed on the camshaft.
A reference pulse signal is input via 5. and,
The CPU 72 controls the operation timing of the holding plate actuator 19, the high frequency oscillator 27, the air blowing control solenoid valve 78, and the adhesive supply control solenoid valve 79 based on the reference pulse signal.

Furthermore, the CPU 72 receives operation signals from the operation keys 76 via the input/output interface 75. This operation key 76 is operated to start and stop the edge folding device. and,
Based on the input of the activation signal from the operation key 76, the CPU 72 reads out the edge bending control program stored in advance in the ROM 73, and based on the program data, the various members 5, 9, 10, 19, 2
A control signal is output to each of 7, 54, 59, 68, 77, 78, and 79. And CPU72
is conveyed in the Y direction in synchronization with the operation of the folding guide 22, folding plate 26, etc. so that the folding work by the folding guide 22, folding plate 26, etc. and the movement of the edge bending head 11 are performed alternately. control motor 5, X-direction transport motor 9, θ-direction rotation motor 10, etc.

Next, the operation of the edge folding device constructed as described above will be explained by taking as an example a series of folding operations for folding the edges of pocket work cloth W as shown in FIG. In order to fold the edge of the pocket work cloth W, a control program for one pattern is stored in advance in the ROM 73.

Now, when the work cloth W held by the cloth clamp 13 is set in the edge folding head 11 and the operation key 76 is operated to start the edge folding device, the CPU
72 drives a cam drive motor 77, inputs a reference pulse signal from a reference pulse sensor 80, and operates each member 11, 16, 22 to 72 at the timing shown in FIG. 19 in synchronization with one revolution of the camshaft.
In order to operate 25, 29, 60, 64 etc.
Each member for driving 5, 9, 10, 19, 27, 5
4, 59, 68, 77, 78, 79, etc.

First, as shown in FIG.
Regarding the folding of the straight part A of Wa, 3rd to 6th
The explanation will be made according to the timing chart shown in FIG.

FIG. 3 is a diagram showing the initial state in which the work cloth W is set, and corresponds to the cam angle of 0° in FIG. 19. In this state, the presser member 25, the folding guide 2
2. The output horn 29, the holding plate 16, the fold presser 64, and the fold guide 60 are each arranged at a retracted position upwardly away from the anvil 21. Further, the folding plate 26 is placed in a retracted position below the anvil 21, and the tip of the supply nozzle 24 is connected to the folding guide 22.
is located close to. Further, harmonic vibration by the high frequency oscillator 27, air blowing from the blowing nozzle 30, feeding of the edge bending head 11 by the Y direction conveyance motor 5, the X direction conveyance motor 9, the θ direction rotation motor 10, etc. ) are in a stopped state.

When the camshaft rotates from this state and the cam angle reaches approximately 40°, the presser member 2
5 and the folding guide 22 are moved down and placed in an operating position for pressing and holding the work cloth W. Further, the folding plate 26 is moved upward and laterally through the cutout recess 21b of the anvil 21, and is placed in an operating position where it substantially overlaps the upper surface of the operating portion 23 of the folding guide 22. At this time, the edge Wa of the work cloth W is pushed up from below by the folding plate 26, and the folding is performed while being guided by the tip edge 23a of the working part 23, and the working part 23 is folded together with the filamentous adhesive J. Caught between Wa's cloths. In addition, the output horn 29 has a folded edge.
It begins to move downward to contact Wa.

At this time, the fold presser 64 and the fold guide 60 each start to move downward, but since the folding is in the straight line part A, the respective position adjustment actuators 59 and 6
8, each of the members 64, 60 is retracted to a position where they do not come into contact with the work cloth W, resulting in an idle operating state. This state continues during the subsequent folding of the straight portion A.

Subsequently, when the cam angle is approximately 60° to 80°,
The CPU 72 activates the high frequency oscillator 27 to start ultrasonic vibration, and as shown in FIG.
It is moved down to the operating position where it contacts Wa.

Then, when the cam angle is between 60° and 185°, the ultrasonic vibration continues, and the contact between the output hole 29 and the already folded edge Wa generates heat in the cloth and thread-like adhesive J in the contact area. The thread-like adhesive J is melted and the folded portion can be bonded together, and also creases can be formed in the folded portion due to the ironing effect.

Furthermore, when the cam angle reaches 185°, the CPU 72 activates the air blowing control solenoid valve 7 in order to cool down the filamentous adhesive J that was melted just before and spread over the folded part.
8 to open and start blowing air from the blow-off nozzle 30. Thereby, the folded portion can be bonded quickly and reliably. Furthermore, around this time, the supply nozzle 24 begins to move in a direction away from the folding guide 22 and the like, and the tip of the filamentous adhesive J heated and melted by the output horn 29 begins to be pulled and cut.

Then, when the cull angle is 185° to 260°, the movement of each member 16, 22 to 26, 29, etc. is started. That is, the folded plate 26 is moved laterally from the action position overlapping the action part 23, and the CPU
72 operates the retainer plate actuator 19 to move the retainer plate 16 from the retracted position to the active position. As a result, the folded edge Wa is held by the holding plate 16 instead of the folded plate 26.
That is, the folded edge Wa returns to the holding plate 16.
established by the law. Further, when the holding of the folded portion by the holding plate 16 is substantially completed, the presser member 25 is moved upward to release the pressure on the work cloth W, and the folding guide 22 is further moved upward to release the holding of the work cloth W. be done. Further, the output horn 29 is moved upward and begins to move away from the workpiece cloth W.

As a result, the edge bending head 11 can be moved. That is, the edge Wa folded this time is held only by the holding plate 16, and an appropriate gap is formed between the work cloth W and the anvil 21, and the work cloth W and each member 16, 21 to 23, 25 etc. is permitted.

Then, when the cam angle reaches around 260°, as shown in FIG. 29 mag at the edge
Edge bending head 11 for moving along Wa
sending begins.

Thereafter, when the cam angle is 260° to 360°, the return of each member 16, 22 to 26, 29, etc. to the initial state is completed, and the feeding of the edge bending head 11 is completed.

That is, the folded plate 26, the output horn 29, and the holding plate 1
6 is completed from the operating position to the retracted position, and the return to the initial state in which the supply nozzle 24 approaches the folding guide 22 and the like is completed. Further, the CPU 72 drives and controls the Y-direction transport motor 5, the X-direction transport motor 9, and the θ-direction rotation motor 10 in order to move the edge bending head 11 along the linear edge Wa. As a result, the edge bending head 11 is moved and each member 16, 22 to 26, 29, etc. is moved along the edge Wa, and each member 16, 22 to 26, 29 is moved.
etc. are moved by a predetermined amount to a position corresponding to the next folding area. Furthermore, in order to supply the filamentous adhesive J in synchronization with the movement of the edge bending head 11,
The CPU 72 opens the adhesive supply control solenoid valve 79 to introduce compressed air into the adhesive supply device 33 . As a result, new filamentous adhesive J to be used next can be led out to the side of the folding guide 22.

As described above, the current series of folding operations for folding the straight portion A is completed, and the next folding operation is started.

On the other hand, when folding the curved portion B of the edge Wa of the pocket work cloth W, each member 1
In addition to operations such as 6, 22 to 26, 29, folding
A fold guide 60 and a fold presser 6 for processing Wb
4 is activated. To this end, when folding the curved portion B, the CPU 72 operates the position adjusting actuators 59 and 68 to move the pleat guide and the pleat presser 64 from the idle operating state to a position where they can come into contact with the work cloth W.

Therefore, as shown in FIG. 19, when the cam angle becomes approximately 25° from the initial state corresponding to a cam angle of 0°,
The pleat presser 64 and the pleat guide 60 begin to be moved down.

Then, when the cam angle becomes 40°, the 14th and 1st
As shown in Figure 6, the presser member 25 and folding guide 22
is arranged at a position close to the fold Wb of the work cloth W. Further, the folding plate 26 is arranged at a working position that substantially overlaps the upper surface of the working part 23, whereby the edge Wa of the work cloth W is folded, and the folded edge Wa is folded.
Folds Wb will occur in a portion of Wa.

After that, when the cam angle reaches 60°, the fold presser 64
and the fold guide 60 is further moved down, and the fold guide 60
The front base of the fold Wb is pressed by this, and the head of the fold Wb is pressed by the fold presser 64 before and after this.

Then, when the cam angle becomes 80°, the 15th,
As shown in Fig. 17, the fold presser 64 and the fold guide 60
The folds Wb generated by the edge folding are pressed and become flat. As a result, the folds Wb can be reliably treated to improve the appearance of the folded state.

In this state, ultrasonic vibration by the high frequency oscillator 27 has already started, and the lower end of the output horn 29 has been moved down to the operating position where it abuts the folded edge Wa. And the cam angle is
The ultrasonic vibration is continued at 60° to 185°, and the contact part of the output horn 29 is heated, and the thread-like adhesive J
is melted, the folded portion can be bonded, and creases can be formed in the work cloth W by the ironing effect. At this time, creases can also be formed in the folds Wb that are in the flattened state.

After that, when the cam angle reaches 185°, air blowing from the blowing nozzle 30 is started, and the filamentous adhesive J melted just before is cooled, so that the folded edge Wa can be bonded at an early stage. . Also, around this time, the supply nozzle 24 is moved to start cutting the filamentous adhesive J.

Then, when the cam angle reaches 200°, the fold presser 64
and when the pleat guide 60 begins to be moved up to move away from the working position and the cam angle reaches approximately 240°,
Both members 64, 60 are returned to the retracted position.

Around this time, when the cam angle is 185° to 320°, the presser member 25, the folding guide 22, the folding plate 26, and the output horn 29 are completely returned from the operating position to the retracted position, and the edge is replaced by the folding plate 26. In order to press and hold the folded portion of section Wa, the retaining plate 16 is moved to the operating position. Furthermore, the filamentous adhesive J is cut by the reciprocating movement of the supply nozzle 24. Furthermore, each member 16,
In order to move 22 to 26, 29, 60, 64, etc. by a predetermined amount, the edge bending head 11 is fed.
At the same time, a new filament adhesive J to be used for the next bonding is derived. The edge bending head 11
is along the curved edge Wa based on the operation of the Y-direction transport motor 5 and the X-direction transport motor 9.
Sent in the XY direction. Further, along with this feeding in the XY direction, the θ direction rotation motor 10 is rotated by a predetermined amount in the θ direction, and one side edge 21a of the anvil 21 is rotated as an edge.
The edge bending head 11 is rotated so as to be substantially parallel to the tangent to the curved shape of Wa.

Then, when the cam angle reaches 360°, the holding plate 16 is returned to its initial state, air is blown from the blowing nozzle 30, the edge bending head 11 is fed, and the filamentous adhesive J is drawn out from the adhesive supply device 33. will be stopped.

As described above, the current series of folding operations for folding the song selection portion B is completed, and the next folding operation is started.

As mentioned above, in this embodiment, the edge of the work cloth W
In order to bend Wa into a desired shape, an edge bending head 11 is provided so as to be movable relative to the cloth clamp 13.
6, 22 to 26, 29, 60, 64 etc. are processed cloth W
It is provided so as to be relatively movable along the edge Wa of. Moreover, each of the bending members 16, 22 to 2
The timing is such that the bending work by 6, 29, 60, 64, etc. and the movement thereof are performed alternately.

As a result, even when the width of the work cloth W is large and the folding length is large, when the work cloth W is flexible, or when folding the edge Wa of the curved part B, etc.
Smooth folding can be performed without causing excessive tension on the edge Wa of the work cloth W and without causing twisting. Therefore, a desired folding shape can be easily obtained as an apparatus for automating folding.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be implemented as follows by changing a part of the structure as appropriate without departing from the spirit of the invention.

(1) In the embodiment described above, the pressing member 25 and the blowing nozzle 30 were provided, but these may be omitted.

(2) In the above embodiment, various drive cams such as a folding guide drive cam, a presser member drive cam, a folding plate drive cam, a pleat presser drive cam, an operating member drive cam 40, and a main body drive cam 49 are used. Each member 22
26, 29, 60, 64, etc., but these members 22 to 26, 2
Each of the actuators 9, 60, 64, etc. may be operated by a dedicated actuator.

[Effects of the Invention] As detailed above, the present invention includes a cloth support plate, a folding guide, a folding plate, an ultrasonic vibrator, an auxiliary holding plate, a folding plate driving means, and an auxiliary holding plate driving means in a folding head. At the same time, the folding head is moved along the outer peripheral edge of the work cloth held by the cloth holding means, and the bending of the edge and the movement of the folding head are repeated. When the folding plate moves to the retracted position for movement, the auxiliary presser plate is moved to the pressing position, and when the folding plate is moved from the retracted position to the folding position, the auxiliary presser plate is moved to the separated position. Because of this, it is possible to automatically perform the folding operation sequentially along the outer periphery of the processed fabric, resulting in good work efficiency, and even when the folding head is moved to perform curved folding. Since the bent portion does not return, it has the advantage that it can be applied to any bent shape.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a schematic configuration of an edge folding device showing one embodiment of the present invention, FIG. 2 is a partially cutaway plan view showing a state in which work cloth is set, and FIGS. 3 to 6 The figure is a partially cutaway perspective view showing the structure of the edge bending mechanism and its series of operations, FIG. 7 is a partially cutaway side view showing the structure of the edge bending mechanism, and FIG. FIG. 9 is a partially cutaway perspective view showing the configuration of the adhesive supply mechanism. FIG. 10 is a partially cutaway front view of the adhesive supply device. FIG. 11 is a top and bottom view of the ultrasonic transducer body. FIG. 12 is a partially cutaway perspective view showing the main parts of the operating position adjusting mechanism; FIG. 13 is a partially cutaway perspective view showing the configuration of the curved bending assist mechanism; 14 and 15 are partially cutaway perspective views illustrating the function of the curve-folding assisting mechanism, FIGS. 16 and 17 are partially cut-away front views similarly illustrating the function of the curve-folding assisting mechanism, and FIG. 18 is a partially cutaway view of the edge folding device. FIG. 19 is a block diagram showing the electrical configuration, FIG. 19 is a timing chart showing a series of operations of each member of the edge folding device, and FIG. 20 is a plan view illustrating edge folding of pocket fabric. 3... Conveyance board, 5... Y direction conveyance motor, 7
...transport block, 9...X-direction transport motor,
10...Motor for rotation in the θ direction, 12...Base (3, 5, 7, 9, 10, 12, etc. constitute the bending head feeding means), 13...Cloth clamp as cloth holding means, 21...Anvil,
22...Folding guide, 26...Folding plate, 71...Microcomputer as control means, W...Working cloth, Wa...Edge.

Claims (1)

[Scope of Claims] 1. A folding head that bends a part of the outer peripheral edge of the work cloth held by the cloth holding means; and after folding the part of the outer peripheral edge of the work cloth, and a folding head feeding means for relatively moving the folding head along the outer peripheral edge of the work cloth to the next folding position, and the folding of the work cloth by the folding head and the movement of the folding head are repeated. A work cloth edge folding device configured as follows, wherein a notch is formed in the folding head, and an outer peripheral edge of the work cloth held by the cloth holding means covers the notch. a folding guide having a working portion that can press the work cloth at a position adjacent to the notch; a retracted position that is recessed into the notch of the cloth support plate; and a folding guide that presses the work cloth. a folding plate that is movable between a folding position overlapping the upper surface of the working part of the folding guide and folding the outer peripheral edge of the work cloth above the working part of the folding guide; The folded portion of the work cloth is placed on the feed-out side of the work cloth so as to be movable up and down, and the folded portion of the work cloth bent by the folding guide and the folding plate is pressed and ultrasonic vibration is applied to the folded portion of the work cloth. an ultrasonic vibrator for ironing the folding plate; an auxiliary presser plate movable between a pressing position overlapping the upper surface of the working part of the folding guide and a separating position separating from the working part; and the folding plate. is moved from the retracted position to the folding position to fold a part of the outer peripheral edge of the work cloth onto the upper surface of the folding guide, and after the ironing by the ultrasonic vibrator is completed, the folding head is sent. a folding plate drive means for returning the folded plate from the folded position to the retracted position prior to movement of the folding head by the means; and the auxiliary holding plate when the folded plate is moved from the folded position to the retracted position by the folded plate driving means. and auxiliary presser plate driving means for moving the auxiliary presser plate to the pressing position and moving the auxiliary presser plate to the separated position before the folding plate is moved from the retracted position to the folding position. edge folding device.