JPH0376157B2 - - 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 a device for folding the edge of a work cloth,
For example, the one disclosed in Japanese Patent Publication No. 63-5115 is known. This device folds a predetermined area of the edge of a work cloth, and then transports the work cloth along the crease line while pressing the folded portion with a feed foot. Since this method only presses the edges of the work cloth, it is difficult to maintain the folded state of the edges.
In addition, a configuration in which the output horn of an ultrasonic generator is brought into contact with the folded edge portion of the processed cloth to iron the bent portion immediately after the folded edge is disclosed in, for example, Japanese Patent Application Laid-Open No. 115588/1988. It is disclosed in the proposed split seam sewing machine.

According to this ultrasonic generator, by applying ultrasonic vibration by bringing the output horn into contact with the bent portion of the edge immediately after being bent, the cloth itself in the contact portion of the output horn generates heat. The creases are formed by the ironing effect of the heat. In addition, since it utilizes the heating effect unique to ultrasonic vibrations, it is possible to achieve instantaneous heating and instantaneous de-energization, and it is safe to use, with no risk of burns even if the worker's fingers come into contact with it. It can also improve your sexuality.

[Problems to be Solved by the Invention] In order to fold the outer periphery of the work cloth using the conventional structure described above, after the bending operation on one side of the outer periphery of the work cloth is completed, the remaining sides must be folded. In order to sing,
It is necessary to reset the work cloth on the folding device. For this reason, there is a problem that work efficiency is poor and it is difficult to maintain the bent state of the edge.

Therefore, in order to maintain the bent state of the edges, ironing may be performed using the ultrasonic generator. It is generally known that when forming creases in cloth using the output horn of an ultrasonic generator, increasing the contact pressure of the output horn against the cloth increases the amount of heat generated.

Therefore, if the contact position of the output horn against the work cloth is mechanically set constant, the contact pressure of the output horn will change depending on the work cloth of different thickness, and the amount of heat generated will be adjusted to an appropriate level. It becomes difficult to set the fabric on the fabric, and the texture of the processed fabric is also impaired.

This invention was made in view of the above-mentioned circumstances, and its purpose is to eliminate the need for the operator to reset the work cloth, which was conventionally required when folding work along the outer periphery of the work cloth. To provide a work cloth edge folding device that enables efficient folding work, maintains the folded state of the edges of the work cloth, and does not impair the texture of the folded edges.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a work cloth holding means for holding a work cloth with its outer peripheral edge protruding, and a work cloth holding means that supports the outer peripheral edge of the work cloth. a folding head comprising a flexible support plate and a bending means for folding a part of the outer peripheral edge of the work cloth supported by the support plate; In order to fold the cloth along the forming line, the folding head is moved parallel to the support plate and rotated around an axis perpendicular to the support plate, the folding head feeding means being provided with a bending head feeding means for moving the folding head parallel to the support plate and rotating the folding head about an axis perpendicular to the support plate. A work cloth edge folding device configured to repeatedly fold a part of the fabric and move a folding head, the folding head having a vertically movable member adjacent to the folding means. an ultrasonic generating means equipped with an output horn for pressing the edge folded portion of the work cloth supported and folded by the folding means; and the output horn is brought into contact with the edge folded portion. a moving means for moving between an operating position and a retracted position separating the same edge portion from the bent portion; and an adjusting motor driven to adjust the distance between the support plate and the output horn at the operating position. Prepare,
The adjustment motor is driven to adjust the distance while the folding head is moved to continuously fold the outer peripheral edge of the work cloth along the crease forming line.

[Function] In the present invention having the above-described configuration, the outer peripheral edge of the work cloth held by the work cloth holding means is supported by the support plate of the bending head, and a portion thereof is bent by the bending means. On the other hand, the output horn of the ultrasonic generating means disposed adjacent to the bending means is lowered by the moving means from the retracted position toward the support plate, and at the working position, the output horn of the ultrasonic generating means disposed adjacent to the bending means is moved down toward the support plate, and at the working position, the output horn of the ultrasonic generating means disposed adjacent to the bending means is moved downward from the retracted position toward the support plate. Press. After this folding and pressing of the folded part are performed, the folding head feeding means moves the folding head to the next folding position.
Rotate. Here, the distance between the support plate and the output horn moved to the operating position is adjusted by an adjustment motor, and the bending head is moved to continuously bend the outer peripheral edge of the work cloth. During the bending operation, the adjustment motor is driven to adjust the distance according to changes in the thickness of the bent portion.

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

FIG. 3 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. Between both guide rods 6 is a male threaded rod 8 extending parallel to the guide rods 6.
is rotatably arranged, and the rod 8 is screwed into the conveying block 7. Further, one end of the male threaded rod 8 is drivingly connected to an X-direction transport motor 9 attached to the transport board 3. The male threaded rod 8 is rotated in forward and reverse directions based on the drive of the X-direction transport motor 9, so that the transport block 7 is reciprocated on the guide rod 6 in the X direction.

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 mentioned above, the transport board 3, the Y direction transport motor 5, the transport block 7, the X direction transport board motor 9,
A moving means is constituted by the base 12, the motor 10 for rotation in the θ direction, etc., and is connected to the transport board 3 or the transport block 7.
Based on the movement of the base 12 and the rotation of the base 12, the edge bending head 1
1 is moved in the Y direction or the X direction and rotated in the θ direction. The X-direction transport motor 9, the Y-direction transport motor 5, the θ-direction rotation motor 10, etc. constitute a bending head feeding means.

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. Further, 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 into the edge bending head 11 will be explained.

5 to 9 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 21 is provided to receive the edge Wa of the work cloth W, the upper surface of which is attached to the edge Wa of the work cloth W.
It serves as a reference support surface S on which Wa is placed. or,
A cutout recess 21b is formed in one side edge 21a of the anvil (cloth support plate) 21.

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 forms an edge.
Acts as a guide to form creases when folding Wa. A through hole 2 formed in the acting portion 23
A filamentous adhesive J drawn out from a supply nozzle 24 disposed above the anvil 21 passes through the anvil 3b, and its tip protrudes to the side of the action part 23.

The supply nozzle 24 is connected to an adhesive supply device (not shown), and when the supply device is operated, the filamentous adhesive J is drawn out from the supply nozzle 24.
Further, the adhesive supply device is drivingly connected to a drive cam for a supply device (not shown), and based on the operation of the drive cam, the tip of the supply nozzle 24 is moved between a position close to the folding guide 22 etc. and a position slightly separated from the folding guide 22 etc. It is reciprocated between the two positions.

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 2 having a substantially L-shaped cross section is formed in correspondence with the notch 22a.
5 is arranged to be movable up and down. 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 tip of this presser member 25 is connected to the notch 22.
The movement of the work cloth W is regulated by auxiliary pressing of a part of the work cloth W through a.

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 shown by the solid line in FIGS. 5 and 9.
The sixth,
The folding guide 22 is moved to the operating position shown by the two-dot chain line in FIGS. 7 and 9, overlapping the upper surface of the operating portion 23, and then follows the almost reverse route to the above and is shown by the solid line in FIGS. 8 and 9. It is returned to the retracted position shown.

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

Further, above the anvil 21, an output horn 29 of an ultrasonic transducer main body 28, which constitutes a part of an ultrasonic generator as an ultrasonic generating means, is arranged to be movable up and down. That is, the ultrasonic transducer main body 28 is in a retracted position where its output horn 29 is separated from the anvil 21 as shown in FIGS. It is supported so as to be movable up and down between an operating position close to the anvil 21 via the work cloth W on the side of the anvil 21 .

The ultrasonic bonding device in this embodiment is an ultrasonic vibrator equipped with a high-frequency oscillator, a resonant vibrator that converts the vibration into ultrasonic vibration, and an output horn 29 that transmits the ultrasonic vibration while amplifying the ultrasonic vibration. It is composed of a main body 28, an anvil 21 disposed opposite to an output horn 29, and a pressurizing device that moves the main body 28 toward the anvil 21. The high frequency oscillator and the resonant type vibrator are housed in the ultrasonic vibrator main body 28, and an output horn 29 projects downward from the main body 28. When the output horn 29 is moved from the retracted position to the operating position, it comes into contact with the work cloth W in order to press the bent portion of the edge Wa immediately after being bent, and in this contact state, By activating the high frequency oscillator, the cloth in the contact area and the filamentous adhesive J between the cloths are heated, and the filamentous adhesive J having a low melting point is melted and bonded, and the ironing effect is applied to the workpiece cloth W. A crease is formed.

FIG. 1 is a diagram showing the configuration of the vertical movement mechanism of the ultrasonic transducer main body 28 and the operating position adjustment mechanism.
A planar guide member 46 is attached to the machine frame 31 and supports the ultrasonic transducer main body 28 in a vertically movable manner. Further, below the guide member 46, two pairs of guide rollers 47 are arranged at a predetermined interval. A pair of guide plates 48 are attached to the side surfaces of the ultrasonic transducer body 28.
engages with the guide roller 47, and the main body 2
The vertical movement of 8 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 is rotatable via a die 51 to an engagement pin 28a protruding from the side surface of the main body 28. connected.

Further, as shown in FIGS. 1 and 2, a cam follower 50
A center pin 50c that projects laterally and forms the center of rotation of the cam follower 50 is provided at the base end of the cam follower 50. An adjusting die 52 having a female threaded 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, the guide member 46 and the main body drive cam 49
A moving means is constituted by the cam follower 50 and the like,
By rotating the main body drive cam 49, the cam follower 50 is rotated around the center pin 50c, and the cam follower 50 is rotated based on the engagement between the engagement recess 50b on the distal end side and the engagement pin 28a of the main body 28. The main body 8 is moved up and down. As a result, the output horn 29 of the main body 28 comes into contact with the workpiece cloth W placed on the reference support surface S shape, as indicated by the two-dot chain line in FIG. It is reciprocated between the retracted position shown by the solid line in the figure.

In addition, an adjustment actuator (adjustment motor) 54
By activating, 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,
The vertical position of the adjusting die 52 is changed. Then, based on the change in the vertical position of the adjusting die 52, the position of the center pin 50c of the cam follower 50, that is, the position of the rotation center of the cam follower 50, is changed, and the rotation of the cam follower 50 changes the position of the center pin 50c of the cam follower 50. The operating position of the output horn 29 when moved is changed upward or downward. That is, in this embodiment, when the main body 28 is moved up and down, the amount of vertical movement of the output horn 29 is always constant, and the operating position of the output horn 29 is determined based on the operation of the adjustment actuator 54, that is, as shown in FIG. Only the distance G between the reference support surface S of the anvil 21 and the lower end surface of the output horn 29 is adjusted.

Moreover, above the anvil 21, the tip of a blow-off nozzle 30 for blowing out air for cooling is disposed so as to face downward. This blowing nozzle 30 is used to blow the filamentous adhesive J melted by the heating of the output horn 29.
Air is blown out from an air compressor (not shown), which is provided to quickly cool the air.

Further, above the anvil 21, there is a blowout nozzle 3.
Edges bent in synchronization with air blowing from 0
A holding plate 16 for auxiliary pressing and holding of Wa is arranged to be movable up and down.

As shown in FIG. 10, the holding plate 16
The support shaft 18a is attached to the bracket 17 attached to the
It is attached to the tip of an actuating piece 18 that is rotatably supported around . An output shaft 19a of a holding actuator 19 attached to the bracket 17 is connected to an intermediate portion of the actuating piece 18. When the retaining plate actuator 19 is operated, its output shaft 19a is moved upward, whereby the operating piece 18 is rotated upward and the retaining plate 16 is placed in a retracted position away from the anvil 21. Also, by moving the output shaft 19a downward, the actuating piece 18
is rotated downward, and the holding plate 16 is placed close to the anvil 21 in an operating position for holding the work cloth W. In this working position, the retaining plate 16 and the anvil 2
A certain amount of gap is formed between the reference support surface S of No. 1 and the reference support surface S of No. 1.

Next, the operation of the edge folding device configured as described above will be explained.

FIG. 5 is a diagram showing an initial state in which the work cloth W held by the cloth clamp 13 is set on the edge bending head 11. In this state, the presser member 25, the folding guide 22, the output horn 29, and the holding plate 16 are each placed at a retracted position away from the anvil 21 upward. Also, the folded plate 26 is an anvil 21
The supply nozzle 24 is disposed at a retracted position in which it is spaced apart downwardly and laterally, and the tip of the supply nozzle 24 is disposed in a position close to the folding guide 22. Further, the ultrasonic vibration by the high frequency oscillator of the ultrasonic vibrator main body 28, the air blowing from the blowing nozzle 30, and the feeding of the edge bending head 11 by the motors 5, 9, 10, etc. are all stopped.

From this state, as shown in FIG.
5 and the folding guide 22 are moved down to the operating position, the work cloth W is held under pressure between it and the reference support surface S of the anvil 21. Then, when the folded plate 26 is moved through the cutout recess 21b of the anvil 21 and placed in the working position where it substantially overlaps the upper surface of the working part 23, the edge Wa of the work cloth W is pushed up from below by the folded plate 26. , a portion of which is guided by the tip edge 23a of the action portion 23 while folding is performed.
As a result, the action portion 23 is sandwiched together with the thread-like adhesive J between the folded edges Wa.

Next, when the high-frequency oscillator is activated to start ultrasonic vibration and the main body drive cam 49 is rotated to move the ultrasonic vibrator main body 28 downward, the lower end of the output horn 29 as shown in FIG. is moved down to the operating position where it abuts the edge Wa that was folded in just before.

When the ultrasonic vibration is continued in this contact state, the output horn 29 and the already folded edge Wa come into contact with each other, and the cloth and thread-like adhesive J in the contact portion generate heat. As a result, the thread-like adhesive J is melted and the folded portion can be bonded, and a crease can be formed in the folded portion due to the ironing effect.

After that, when air is blown out from the blow-off nozzle 30,
The filamentous adhesive J melted just before and spread over the folded portion is cooled, and the folded portion can be bonded quickly and reliably. Furthermore, when the supply nozzle 24 is moved in a direction away from the folding guide 22 before or after this, the tip portion of the filamentous adhesive J heated and melted by the output horn 29 is pulled and cut.

Then, when the output horn 29 is moved upward, the melting of the filamentous adhesive J is completed, and the formation of a crease in the folded portion is completed.

Subsequently, the folded plate 26 is returned to the retracted position below the anvil 21 from the working position overlapping the working part 23, and the retaining plate actuator 1 is placed before and after this.
9 is operated, the holding plate 16 is placed in an operating position where it substantially overlaps the operating portion 23 via the folded edge Wa. As a result, the folded edge Wa is held by the holding plate 16 instead of the folded plate 26. That is, the return of the folded edge Wa is regulated by the holding plate 16.

Then, while the holding plate 16 is holding the folded portion, when the pressing member 25 and the folding guide 22 are each slightly moved upward to release the pressure on the work cloth W, the edge folding head 11 becomes ready to be fed. . 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.

Therefore, when each motor 5, 9, 10 is controlled to move the edge bending head 11 along the edge Wa in this relative movement allowed state, the eighth
As shown in the figure, each member 16, 21 to 26, 29, etc. is moved along the edge Wa of the work cloth W, and each member 16, 21 to 26, 29, etc. is moved to a position corresponding to the next folding area. be done. Furthermore, in order to supply the filamentous adhesive J in synchronization with the movement of the edge bending head 11, when the adhesive supply device is operated,
A new filamentous adhesive J to be used next is applied to the action part 23.
is derived laterally.

After that, when the retaining plate actuator 19 is activated and the retaining plate 16 is moved to the upper retracted position, this series of bending operations is completed and the initial state for moving on to the next bending operation is established. Become.

As described above, a series of bending operations of the edge Wa can be performed.

In this embodiment, the operating position of the output horn 29 can be changed up or down by moving the center of rotation of the cam follower 50 up or down based on the operation of the adjustment actuator 54 and the adjustment die 52. Therefore, the contact pressure of the output horn 29 against the work cloth W can be arbitrarily changed, and the contact pressure of the output horn 29 can be adjusted to an appropriate value according to the thickness of the work cloth W. Furthermore, the amount of heat generated by the cloth itself due to ultrasonic vibration can be changed and set to an appropriate value.

That is, when the cloth thickness is large, the output horn 29
By adjusting the operating position of the output horn 29 so that the distance G between the anvil 21 and the reference support surface S of the anvil 21 increases, the contact pressure of the output horn 29 is prevented from becoming excessive and an appropriate amount of heat generation is set. The texture of the work cloth W is not impaired.
In addition, when the cloth thickness is small, adjusting the operating position so that the distance G becomes small will reduce the output horn 2.
It is possible to prevent the contact pressure 9 from becoming too low and to set an appropriate amount of heat generation.

When folding workpiece cloths W having different thicknesses from the beginning, the distance G may be adjusted by operating the adjustment actuator 54 in advance. In addition, when the thickness of the work cloth W changes during a series of folding operations, for example, when the cloth overlaps four or more layers due to folding of a curved edge, the adjustment actuator 54 is By operating in real time, the interval G can be adjusted to correspond to changes in cloth thickness.

Further, in this embodiment, the edge bending head 11 is moved relative to the cloth clamp 13, whereby each of the edge bending members 16, 22 to 26, 29, etc. is moved along. Therefore, when the width of the work cloth W is large and the folding length is long, when the work cloth W is flexible, or when folding the edge Wa of a curved shape, etc., there is no need to force the edge Wa of the work cloth W. Smooth folding can be performed without causing tension or 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 above embodiment, the holding plate 16 and the holding member 2
5. Although the blow-off nozzle 30 is provided, these may be omitted.

(2) In the above embodiment, each member 22 to 26, 29, etc. is controlled by various drive cams such as a folding guide drive cam, a presser member drive cam, a folding plate drive cam, a feeder drive cam, and a main body drive cam 49. However, these members 22-2
6, 29, etc. may be configured to be operated by a dedicated actuator.

[Effects of the Invention] As described in detail above, in the present invention, the folding head is provided with a folding means, an ultrasonic generation means, a moving means, and an adjustment motor, and the folding head is provided with a folding means, an ultrasonic generating means, a moving means, and an adjustment motor. A part of the periphery is bent by the bending means, and the folded portion of the work cloth that has been folded just before by the bending means is pressed by the output horn of the ultrasonic generating means. After this folding and pressing, the folding head feeding means moves the folding head along the outer peripheral edge of the work cloth to the next folding position, and repeats the folding and pressing described above. Here, the vertical position of the output horn of the ultrasonic generating means during pressing is adjusted by an adjustment motor.

Therefore, not only can the outer peripheral edge of the work cloth be folded efficiently and the folded state can be maintained, but also the outer peripheral edge of the work cloth can be continuously folded by moving the folding head. During the bending operation, the adjustment motor is driven to adjust the vertical adjustment according to changes in the thickness of the folded portion, thereby preventing the texture of the folded edge from being impaired.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing a vertical movement mechanism of an ultrasonic transducer body and its operating position adjusting mechanism, showing an embodiment embodying the present invention, and FIG. 2 is a main part of the operating position adjusting mechanism. Partially cutaway perspective view, 3rd
The figure is a perspective view showing the schematic configuration of the edge folding device, Figure 4 is a partially cutaway plan view showing the state in which the work cloth is set, and Figures 5 to 8 are the configuration of the edge folding mechanism and its series of operations. FIG. 9 is a partially cutaway side view showing the configuration of the edge bending mechanism, and FIG.
FIG. 0 is a partially cutaway perspective view showing a configuration for moving the holding plate up and down. 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 (21, 22,
26 etc. constitute the bending means), 28
...Ultrasonic transducer body constituting ultrasonic generation means, 29... Output horn, 31... Machine frame, 46...
...Guide member, 49...Driving cam for main body, 50...
...Cam follower (46, 49, 50 etc. constitute a moving means), 52...Adjustment die, 5
4...Adjustment actuator (adjustment motor), G
...Spacing, S...Reference support surface, W...Working cloth,
Wa...edge.

Claims (1)

[Scope of Claims] 1. A work cloth holding means for holding a work cloth with its outer peripheral edge protruding; a support plate capable of supporting the outer peripheral edge of the work cloth;
a folding head for folding a part of the outer peripheral edge of the work cloth supported by the support plate; and a folding head for folding the outer peripheral edge of the work cloth along a predetermined crease formation line. a folding head feeding means for moving the folding head parallel to the support plate and rotating it around an axis perpendicular to the support plate for bending a part of the outer peripheral edge of the work cloth; The edge folding device for a work cloth is configured to repeatedly move the folding head and the folding head, and the folding head is supported adjacent to the folding means so as to be movable up and down, an ultrasonic generating means equipped with an output horn for pressing the edge folded portion of the work cloth folded by the means; a moving means for moving the bending head between a retracted position and a retracted position away from the bending portion; and an adjustment motor driven to adjust the spacing between the support plate and the output horn in the active position. Edge folding of a work cloth, characterized in that the adjustment motor is driven to adjust the interval during the operation of moving and continuously folding the outer peripheral edge of the work cloth along the crease forming line. bending device.