JP2011030806A - Continuous fabric sticking apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance precision in sewing by increasing force to hold continuous fabric with respect to a sewing frame, and preventing the slip or looseness of the fabric. <P>SOLUTION: An original fabric sticking apparatus 6 includes: the sewing frame 11 to which an original fabric F is stuck; a clamp mechanism 12 for clamping two places in the longitudinal direction of the original fabric F; and an extending mechanism 13 for extending the original fabric F in a width direction. The clamp mechanism 12 includes: a reception frame 19 for receiving the original fabric F on the inner side of the sewing frame 11; a pinching frame 20 opposed to the reception frame 19 via the original fabric F from the inner side of the reception frame 19; and an air cylinder 21 for drawing the pinching frame 20 toward the reception frame 19 and pressing the frame against the reception frame 19. Pinching portions 26, 27 are provided, which pinch the original fabric F by folding the fabric F in a horizontal direction against the opposing surfaces of the reception frame 19 and the pinching frame 20. The pinching portions 26, 27 include projections and recesses to bend the original fabric F in a vertical direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a continuous fabric pasting apparatus for pasting a continuous fabric such as an original fabric on a sewing frame.

  In an embroidery machine for processing an embroidery pattern on an original fabric, an original fabric tensioning apparatus 101 as shown in FIG. 12 is conventionally known. This tensioning device 101 is equipped with a clamp mechanism 105 on the front frame 103 and the rear frame 104 of the sewing frame 102. The clamp mechanism 105 includes a trapezoidal trapezoidal receiving frame 106 that receives the original fabric F, a presser frame 107 that clamps the original fabric F between the receiving frame 106, and an air cylinder 108 that raises and lowers the presser frame 107. Yes. Then, the original fabric F is put on the sewing frame 102, and the front and rear portions of the original fabric F are clamped by the presser frame 107 and the receiving frame 106 (see FIG. 12A), and the original fabric F is embroidered by a plurality of sewing machines 109. After processing the handle, the presser frame 107 is raised (see FIG. 12B), and the original fabric F is unclamped from the sewing frame 102.

  Patent Document 1 describes a method of sewing a continuous embroidery pattern on the original fabric without a break using the receiving frame 106 and the presser frame 107. In Patent Document 2, a receiving frame having an I-shaped cross section is attached to a sewing frame, an expansion / contraction body is attached to the inside of a U-shaped fastening frame, an operator attaches and detaches the fastening frame to the receiving frame, A tensioning device is described that clamps / unclamps a continuous dough between an inflated and deflated body.

Japanese Patent No. 2736440 Japanese Patent Publication No. 2-38711

  However, according to the conventional original fabric tensioning device 101, when a large tension acts on the original fabric F due to sewing shrinkage associated with embroidery processing, or when a thin original fabric F is processed, the clamping mechanism 105 uses the original fabric. There is a problem that the processing position of the embroidery pattern is shifted due to the fact that F is slippery and the pasting position of the original fabric F is changed. In addition, when the clamping mechanism 105 performs a clamping operation, the original fabric F is drawn from the outside to the inside of the sewing frame 102, and the processing accuracy of the embroidery pattern is lowered due to the slack generated inside the sewing frame 102. It was.

  The object of the present invention is to provide a continuous fabric tensioning device that solves the above-mentioned problems, strengthens the holding force of the continuous fabric against the sewing frame, prevents the fabric from slipping and sagging, and can increase the accuracy of the sewing process. There is to do.

  In order to solve the above-described problems, a continuous cloth pasting apparatus according to the present invention includes a sewing frame to which the continuous cloth is attached, and a clamp mechanism that clamps two places in the longitudinal direction of the continuous cloth, and the clamp mechanism includes the sewing frame. A receiving frame that receives the continuous fabric inside, a sandwiching frame that faces the receiving frame via the continuous fabric from the inside of the receiving frame, and an actuator that pulls the sandwiching frame toward the receiving frame and presses it against the receiving frame, It is characterized in that a clamping portion for folding the continuous fabric in the horizontal direction and clamping it is provided on the opposing surfaces of the receiving frame and the clamping frame.

  Here, in order to further strengthen the holding force of the continuous fabric, it is preferable to form a convex portion and a concave portion that bend the continuous fabric in the vertical direction in the sandwiching portion. In this case, it is preferable to provide a play mechanism for providing the sandwiching frame with play in the vertical direction and play with inclination in the direction opposite to the receiving frame.

  In addition, a plurality of rotating bodies are provided in the longitudinal direction of the continuous fabric so that the width of both sides of the continuous fabric is evenly moved during clamping. It is also possible to adopt a configuration in which the body is rotated by the tension of the continuous fabric accompanying the movement of the sandwiching frame. In this case, in order to enhance restraint, it is preferable to provide a needle that pierces the continuous fabric on the outer peripheral surface of the rotating body.

  According to the continuous fabric pasting apparatus of the present invention, the continuous fabric is stretched by the sandwiching frame, and the continuous fabric is horizontally placed between the sandwiching frame and the receiving frame by the sandwiching portion provided on the opposing surface of the receiving frame and the sandwiching frame. Since it is folded in the direction and pinched, it has an excellent effect that the holding power of the continuous fabric can be strengthened, the fabric can be prevented from slipping and loosening, and the accuracy of the sewing process can be increased.

  In addition to this, when the convex portion and the concave portion that bend the continuous fabric in the vertical direction are formed in the sandwiching portion, the holding force of the continuous fabric can be further strengthened. In this case, the holding mechanism can be smoothly fitted by providing the holding frame with play in the vertical direction and play with inclination in the direction opposite to the receiving frame.

  In addition, a plurality of rotating bodies are provided in the longitudinal direction of the continuous fabric, and the rotating bodies are rotated by the tension of the continuous fabric accompanying the movement of the sandwiching frame. In this case, both sides in the width direction of the continuous fabric can be moved evenly during clamping.

It is a side view which shows the Example of the embroidery machine of this invention. It is a top view which shows the original fabric tensioning apparatus with which the embroidery machine of FIG. 1 was equipped. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 showing a clamping mechanism of the raw fabric tensioning device, where (a) is a cross-sectional view when the clamping frame is in an unclamping position, and (b) is a clamping frame that is a receiving frame. It is sectional drawing in the middle of being drawn near. Similarly, (c) is a cross-sectional view when the clamping frame is at the clamp position, and (d) is a cross-section when the clamping frame is pulled away from the receiving frame. (A1) is the elements on larger scale of Fig.3 (a), (c1) is the elements on larger scale of FIG.4 (c). The play mechanism of a clamping frame is shown, (a) is a plan view, (b) is a front view, and (c1) to (c3) are sectional views. It is the VII-VII sectional view taken on the line of FIG. 3 which shows the extension mechanism of an original fabric tension apparatus. It is a principal part side view of the embroidery machine which shows the original fabric sticking method. FIG. 9 is a side view showing a step following FIG. 8. FIG. 10 is a side view showing a step following FIG. 9. It is sectional drawing which shows the example of a change of a clamp mechanism. It is sectional drawing which shows the conventional original fabric tensioning apparatus.

  The continuous fabric tensioning device (6) includes a sewing frame (11) to which the continuous fabric (F) is adhered, and a clamp mechanism (12) that clamps two locations in the longitudinal direction of the continuous fabric (F). The clamp mechanism (12) receives the continuous fabric (F) inside the sewing frame (11), and the receiving frame (19) from the inside of the receiving frame (19) through the continuous fabric (F). A sandwiching frame (20) that faces the receiving frame (19), and an actuator (21) that pulls the catching frame (20) toward the receiving frame (19) and presses it against the receiving frame (19). On the opposite surface of the frame (20), there are provided clamping portions (26, 27) for folding the continuous fabric (F) in the horizontal direction so as to bend, and the continuous fabric (F) is bent vertically in the clamping portions (26, 27). Convex parts and concave parts (26c, 26d, 27c, 27d) are formed. The pinching frame (20) is provided with a play mechanism (81) that gives play in the vertical direction and play in a tilt direction opposite to the receiving frame (19).

  Hereinafter, an embodiment in which the present invention is embodied in a raw fabric tensioning apparatus for an embroidery machine will be described with reference to the drawings. As shown in FIG. 1, the embroidery machine 1 supplies an original fabric F, which is a continuous fabric, onto a table 3 from a supply device 2 and processes an embroidery pattern on the original fabric F with a sewing machine 4. The anti-F is recovered from the table 3 to the recovery device 5. An original fabric tensioning device 6 for attaching the original fabric F is installed on the table 3, and the original fabric F is held on the front and rear edges of the table 3 before and after the original fabric tensioning device 6. A holding device 7 is installed.

  As shown in FIG. 2, the raw fabric tensioning device 6 includes a sewing frame 11 to which the raw fabric F is pasted, and a pair of front and rear clamping mechanisms 12 that clamp two places in the longitudinal direction (feeding direction P) of the raw fabric F. And a pair of left and right extension mechanisms 13 that extend the raw fabric F outward in the width direction. The sewing frame 11 includes a front frame 14, a rear frame 15, and left and right side frames 16 and 17, and a clamp mechanism 12 and an extension mechanism 13 are installed on the front frame 14 and the rear frame 15.

  As shown in FIGS. 2 to 6, the front and rear clamping mechanisms 12 include a receiving frame 19 that receives the raw fabric F inside the sewing frame 11, and a sandwiching frame 20 that faces the receiving frame 19 from the inside of the receiving frame 19. (This opposing direction may be simply referred to as an opposing direction.) And a first air cylinder 21 as an example of an actuator that presses the sandwiching frame 20 against the receiving frame 19. The receiving frame 19 is formed in a hollow shape extending in the width direction of the original fabric F, and is attached to the front frame 14 and the rear frame 15 in a state of projecting inside the sewing frame 11. The sandwiching frame 20 is formed to have the same length as the receiving frame 19 and is supported by the rod 23 of the first air cylinder 21 via the support plate 22 and the play mechanism 81 so as to be parallel to the receiving frame 19. Yes.

  A plurality of first air cylinders 21 are provided in the longitudinal direction of the sandwiching frame 20, and installed in the tubular frame 24 on the front frame 14 and the rear frame 15 in a lateral posture in which the rod 23 protrudes inside the sewing frame 11. Has been. Then, in a state where the rod 23 is extended, the sandwiching frame 20 is pulled away from the receiving frame 19 to the inside of the sewing frame 11 and disposed at the unclamping position (see FIG. 3A), and the rod 23 is contracted, The sandwiching frame 20 is pulled toward the front frame 14 and the rear frame 15 and is arranged at the clamp position (see FIG. 4C). A cushion 25 that slides on the table 3 is attached to the lower surfaces of the sewing frame 11 and the receiving frame 19.

  The play mechanism 81 gives the sandwiching frame 20 play in the vertical direction and play in the direction opposite to the receiving frame 19, and as shown in FIG. The following structure is provided between them. A counter plate 82 that forms a space 83 between the support plate 22 and the support plate 22 is attached to the support plate 22 with screws, and a vertically long slot 84 is provided in the counter plate 82. At the tip of the rod 23, a hexagon nut 85 as an engaging member loosely engaged with the elongated hole 84 so as to be relatively vertically movable and relatively non-rotatable, and relatively vertically moved to the space 83 on the distal end side of the hexagon nut 85. A rectangular plate 86 is fixed as an engaging element which can be relatively tilted and loosely engaged so as not to rotate. With this structure, as shown in FIGS. 6 (c1) to (c3), play in the vertical direction and play in the tilt direction are given to the facing plate 82, the support plate 22 and the sandwiching frame 20 therebelow.

The receiving frame 19 is formed with a sandwiching portion 26 composed of an upper facing convex portion 26a and a lower facing concave portion 26b on the surface facing the sandwiching frame 20, and a downward projecting portion at the tip of the lower surface of the facing convex portion 26a. 26c is provided, and an upward concave portion 26d is relatively formed immediately inside the downward convex portion 26c.
The sandwiching frame 20 is formed with a sandwiching portion 27 composed of a lower facing convex portion 27a and an upper facing concave portion 27b on a surface facing the receiving frame 19, and an upward projecting portion on the tip of the upper surface of the facing convex portion 27a. 27c is provided, and a downward concave portion 27d is relatively formed immediately inside the upward convex portion 27c.

  When the sandwiching frame 20 moves from the unclamping position to the clamping position, the opposing convex portion 26a and the opposing concave portion 26b are fitted, and the opposing concave portion 26b and the opposing convex portion 27a are fitted to each other. Meshing occurs in the direction, the original fabric F is folded twice in the horizontal direction, and the downward convex portion 26c and the downward concave portion 27d are fitted, and the upward concave portion 26d and the upward convex portion 27c are fitted, Engagement also occurs in the vertical direction, and the original fabric F is clamped in a state of being bent in the vertical direction (crossing the horizontal direction of the folding).

  At the time of clamping by the fitting, as shown in FIG. 4C and FIG. 5C1, which is an enlarged view thereof, the upper end of the upward convex portion 27c of the clamping portion 27 is the lower end of the downward convex portion 26c of the clamping portion 26. Comes higher than (undercut relationship). Therefore, if the sandwiching frame 20 is moved horizontally, the upper end of the upward convex portion 27c interferes with the lower end of the downward convex portion 26c, and the sandwiching portions 26 and 27 do not fit well.

Therefore, as described above, the play mechanism 81 gives the sandwiching frame 20 play in the vertical direction and play in the tilt direction, thereby avoiding this interference so that the sandwiching portions 26 and 27 are smoothly fitted. I have to.
Specifically, as shown in FIG. 3A and an enlarged view of FIG. 5A1, when the sandwiching frame 20 is separated from the receiving frame 19, as shown in FIG. 6C1. Since the opposing plate 82, the support plate 22 and the sandwiching frame 20 below (hereinafter, these may be referred to as the sandwiching frame 20) are lowered in the range of the long hole 84 by their own weight, the upward convex portion 27c. The upper end of is located at a position lower than the lower end of the downward projection 26c.
Then, as shown in FIG. 3B, when the sandwiching frame 20 is drawn toward the receiving frame 19 and the upper slope of the opposing recess 27b comes into contact with the upper slope of the opposing projection 26a (reference numeral is FIG. 5). (See (a1)), the sandwiching frame 20 or the like rises along the long hole 84 or tilts within the space 83, and the upper end of the upward convex portion 27c passes under the lower end of the downward convex portion 26c. go.
Further, as shown in FIGS. 4C and 5C1, when the sandwiching frame 20 is drawn to the receiving frame 19 and reaches the clamp position, the sandwiching frame 20 and the like are raised by the tension of the original fabric F. The clamping by the fitting is performed.
Further, as shown in FIG. 4D, when the sandwiching frame 20 is pulled away from the receiving frame 19, the sandwiching frame 20 or the like descends along the long hole 84 or tilts within the space 83. The above-mentioned fitting is released.

  As shown in FIGS. 3 and 7, the left and right extension mechanism 13 includes a support frame 31 extending in the front-rear direction inside the sewing frame 11, and both ends of the support frame 31 are attachment members 32 and the front frame 14 of the sewing frame 11. And attached to the rear frame 15. A plurality of rollers 33 as rotating bodies are supported in the longitudinal direction in the support frame 31 (see FIG. 2), and a large number of needles 34 that pierce the raw fabric F are implanted on the outer peripheral surface of each roller 33. The original fabric F is constrained at the left and right sides of the sewing range (two locations spaced apart from each other in the width direction of the original fabric F). A support plate 35 that supports the roller 33 on the table 3 is disposed below the support frame 31, and a flexible pad 36 that receives the needle 34 that passes through the raw fabric F is attached to the upper surface of the support plate 35.

  The attachment member 32 is provided with a vertical second air cylinder 37 and a horizontal third air cylinder 39. The second air cylinder 37 raises and lowers the support frame 31 by extending and contracting the rod 38, and moves the roller 33 to the lower position (see FIG. 7A) and the middle position (about 1 to 2 mm) slightly above (about 1 to 2 mm). 7 (b) and a further upper position (a chain line position in FIG. 7B). At the lower position, the needle 34 pierces the pad 36 and the rotation of the roller 33 is restricted. At the middle position, the needle 34 is separated from the pad 36 while restraining the original fabric F, and the roller 33 rotates as the original fabric F moves. At the upper position, a space is opened below the roller 33, and the original fabric F can be easily set.

  The third air cylinder 39 moves the support frame 31 at the lower stage position in the left-right direction by expanding and contracting the rod 40, and moves the roller 33 between the position of the raw fabric F on the outer side in the width direction (see FIG. 7A) and the inner position (see FIG. 7A). 7 (b)), the original fabric F is tensioned at the outer position, and the original fabric F is relaxed at the inner position. Then, when the front and rear clamping mechanisms 12 perform a clamping operation with the support frame 31 disposed at the inner and middle positions, the roller 33 rotates with the tension of the original fabric F accompanying the pulling of the sandwiching frame 20, The left and right sides of the original fabric F are guided with an equal amount of movement.

  Next, in the original fabric tensioning apparatus 6 having the above-described configuration, a method for tensioning the original fabric F will be described together with the configuration of peripheral devices of the embroidery machine 1. FIG. 8A shows a state after the embroidery pattern is processed on a part of the original fabric F attached to the attaching device 6. In this state, the presser foot 9 and the needle base presser 10 of the sewing machine 4 are stopped above the table 3, and the original fabric F is released from the table 3. The clamping mechanism 12 of the tensioning device 6 clamps the original fabric F between the receiving frame 19 and the clamping frame 20 (see FIG. 4C), and the extension mechanism 13 uses the roller 33 to move the original fabric F in the width direction. It spreads outward (see FIG. 7A).

  The original fabric supply device 2 includes a frame 42 that supports the original fabric F roll 8, an original fabric feed roller 43 that rotates the original fabric roll 8, a motor 44 that drives the roller 43, and a weight that applies a predetermined tension to the original fabric F. A tension applying mechanism 45 provided with a rod 46 (see FIG. 1) is provided. The front and rear original fabric holding device 7 includes a holding frame 47 fixed to both front and rear edges of the table 3, a clamper 48 that releasably presses the original fabric F against the holding frame 47, and a fourth air cylinder 49 that drives the clamper 48. It is arranged.

  When the embroidery process is resumed, after the tensioning device 6 releases the original fabric F from the sewing frame 11, the sewing frame 11 is moved to the next processing position while the supply of the original fabric F is stopped. In this process, first, as shown in FIG. 8B, the presser foot 9 and the needle base presser 10 descend, hold the original fabric F on the table 3, and the clamper 48 of the original fabric holding device 7 holds the holding frame 47. The original fabric F is stretched in the longitudinal direction before and after the tensioning device 6 and held on the table 3.

  Next, as shown in FIG. 8C, the third air cylinder 39 moves the support frame 31 and the roller 33 to the inner position to loosen the original fabric F in the width direction (see FIG. 7B). 1 The air cylinder 21 moves the sandwiching frame 20 to the unclamping position and loosens the original fabric F in the longitudinal direction (see FIG. 3A). Then, the second air cylinder 37 moves the support frame 31 to the middle position, and the roller 33 restrains the left and right sides of the original fabric F by the needle 34 (see FIG. 7B).

  Subsequently, as shown in FIG. 9 (d), the sewing frame 11 moves to the next processing position while the original fabric F is held on the table 3. At this time, since the plurality of rollers 33 rotate at a constant speed in the left and right extension mechanisms 13, there is no possibility that the original fabric F is inclined with respect to the sewing frame 11 and wrinkles are generated in the original fabric F.

  Next, as shown in FIG. 9 (e), the third air cylinder 39 moves the support frame 31 and the roller 33 to the outer position, and tightens the original fabric F in the width direction (see FIG. 7 (a)). 1 The air cylinder 21 moves the sandwiching frame 20 to the clamping position and tightens the original fabric F in the longitudinal direction (see FIG. 4C). Then, the second air cylinder 37 moves the support frame 31 to the lower position, and the roller 33 locks the left and right sides of the original fabric F to the sewing frame 11 with the needles 34 (see FIG. 7A). At this time, since the roller 33 rotates and guides the right and left sides of the original fabric F with an equal amount of movement, the original fabric F can be neatly attached to the inside of the sewing frame 11 without wrinkles.

  Subsequently, as shown in FIG. 9 (f), after the front and rear clampers 48 are separated from the holding frame 47, the original fabric F is released from the table 3 and loosened in the longitudinal direction before and after the original fabric tensioning device 6. Then, the presser foot 9 and the needle base presser 10 of the sewing machine 4 are raised, and the original fabric F inside the sewing frame 11 is released from the table 3, thereby completing the tensioning process of the original fabric F. Thereafter, the sewing machine 4 is restarted, the sewing frame 11 is fed back and forth and right and left on the table 3, and embroidery processing is resumed.

  During the embroidery processing, in the clamp mechanism 12, the holding portions 26 and 27 of the receiving frame 19 and the holding frame 20 turn the original fabric F twice in the horizontal direction, and the upper and lower convex portions and concave portions 26c, 26d, 27c, and 27d. However, since the original fabric F is sandwiched in a state where it is bent in the vertical direction, the original fabric F can be held strongly. For this reason, even when sewing shrinkage occurs in the raw fabric F or when a thin fabric is processed, the fabric can be reliably prevented from slipping and loosening, and the accuracy of embroidery processing can be improved.

  During embroidery processing, as shown in FIG. 8A, the supply device 2 drives the motor 44 at a rotational speed corresponding to the amount of movement of the sewing frame 11 to apply tension to the original fabric F from the original fabric roll 8. It is supplied onto the table 3 via the mechanism 45. Further, as shown in FIG. 10G, during the embroidery processing, the original fabric collecting device 5 winds up the original fabric F by a length of one processed length, folds it, and collects it in the collecting container 51.

  The original fabric collection device 5 is provided with a winding mechanism 52 for winding the processed original fabric F and a guide mechanism 53 for guiding the winding mechanism 52 by following the movement of the sewing frame 11 in the left-right direction. Yes. The winding mechanism 52 is equipped with a motor 54, a pinch roller 55, and a rod 56 that can be moved up and down with a stroke corresponding to the winding amount for one stroke. The guide mechanism 53 is provided with a rail 57, a drive belt 58, a motor 59 (see FIG. 2) and the like that guide the winding mechanism 52 to the left and right under the table 3.

  The present invention is not limited to the above-described embodiments. For example, as described below, the present invention can be appropriately modified and embodied without departing from the spirit of the invention.

(1) The clamping mechanism 71 shown in FIG. 11 is configured such that the clamping frame 20 clamps not only from the inside of the frame 19 but also from the inside and outside both sides of the original fabric F. Specifically, it is different from the above-described embodiment only in that the swing frame 72 is pivotally attached to the sandwiching frame 20 by a hinge 73, and the others are common to the above-described embodiment. The swing frame 72 is formed with a concave sandwiching portion 75 that fits into the outer portion 74 of the receiving frame 19. When the rod 23 is contracted, the clamping part 27 of the clamping frame 20 is fitted into the clamping part 26 of the receiving frame 19, and the concave clamping part 75 of the swing frame 72 is fitted into the outer part 74 of the receiving frame 19. The raw fabric F is clamped (see FIG. 11A), and when the rod 23 is extended, the swing frame 72 opens from the clamping frame 20 (see FIG. 11B). The swing frame 72 receives the original fabric F and unclamps it from the frame 19 (see FIG. 11C). According to this configuration, the raw fabric F can be clamped more firmly with a wider area.

DESCRIPTION OF SYMBOLS 1 Embroidery machine 6 Original fabric tensioning device 11 Sewing frame 12 Clamping mechanism 13 Extension mechanism 19 Receiving frame 20 Clamping frame 21 First air cylinder (as actuator) 26 Clamping portion 26a Opposing convex portion 26b Opposing concave portion 26c Downward convex portion 26d Upward concave portion 27 Holding portion 27a Opposite convex portion 27b Opposite concave portion 27c Upward convex portion 27d Downward concave portion 33 Roller (as rotating body) Roller 34 Needle 61 Clamp mechanism 71 Clamp mechanism 81 Play mechanism F Original fabric

Claims (5)

  A sewing frame (11) to which the continuous fabric (F) is attached and a clamp mechanism (12) that clamps two places in the longitudinal direction of the continuous fabric (F) are provided, and the clamping mechanism (12) includes the sewing frame (11). A receiving frame (19) for receiving the continuous fabric (F) on the inside, a sandwiching frame (20) facing the receiving frame (19) from the inside of the receiving frame (19) through the continuous fabric (F), And an actuator (21) that pulls the receiving frame (20) toward the receiving frame (19) and presses it against the receiving frame (19), and has a continuous fabric (F) on the opposing surface of the receiving frame (19) and the sandwiching frame (20). A continuous dough tensioning device provided with clamping parts (26, 27) that fold back and clamp the sheet in the horizontal direction.   The continuous fabric tensioning device according to claim 1, wherein a convex portion and a concave portion (26c, 26d, 27c, 27d) for bending the continuous fabric (F) in the vertical direction are formed in the clamping portion (26, 27).   The continuous dough tensioning device according to claim 2, further comprising a play mechanism (81) for providing the sandwiching frame (20) with play in the vertical direction and play with an inclination in a direction opposite to the receiving frame (19).   A plurality of rotating bodies (33) are provided in the longitudinal direction of the continuous fabric (F), and the rotating bodies (33) are arranged in the longitudinal direction of the continuous fabric (F). The continuous fabric tensioning device according to claim 1, 2 or 3, wherein the continuous fabric tensioning device is rotated by the tension of the continuous fabric (F) accompanying the movement of the sandwiching frame (20).   The continuous fabric tensioning device according to claim 4, wherein a needle (34) that pierces the continuous fabric (F) is provided on the outer peripheral surface of the rotating body (33).

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