JP5608361B2 - Sheet transfer device - Google Patents

Description

  The present invention relates to an apparatus for transferring an elastic sheet piece to another member while maintaining the stretched state.

  The present applicant has previously proposed a breathable sheet holding device (see Patent Document 1). This holding device has a segment for holding a breathable sheet having elasticity in an extended state. In this apparatus, the continuously supplied breathable sheet is locked to the segment in an extended state, and the breathable sheet is cut to a predetermined length while maintaining the extended state. The breathable sheet after cutting is continuously held by the segment, and then the breathable sheet is transferred to another member. This segment is provided with a pair of locking pieces that are in surface contact with the breathable sheet and hold the breathable sheet in an extended state. As the locking piece, for example, a sprayed member is used.

JP-A-9-294769

  According to the holding device, there is an advantage that the stretched state of the breathable sheet having elasticity can be maintained with a simple structure. In this holding device, the locking force between the breathable sheet and the segment is expressed by the thermal spray member provided on the segment. If the engagement area by the thermal spray member is increased, the locking force is increased. However, since the thermal spray member is an expensive material, it is not economical to use the thermal spray member in a large area. In addition, when the expansion / contraction force of the breathable sheet is changed due to the change of the product type, it is necessary to replace the thermal spray member so that the locking force suitable for the new breathable sheet is generated. Low degree of freedom of change. Furthermore, since this holding device maintains the stretched state only with a fixed locking force, when the breathable sheet held by the segment is transferred to another segment, the transfer can be performed smoothly. There may not be.

  An object of the present invention is to improve the above-described conventional holding device.

The present invention relates to a sheet transfer apparatus for transferring a sheet piece having elasticity held on a holding surface of a holding head in an extended state to another member or apparatus while maintaining the extended state.
A suction hole for providing the holding surface of the holding head with a pair of locking portions for locking the front end region and the rear end region along the extending direction of the sheet piece, and sucking and holding the sheet piece on the holding surface A sheet transfer device provided with a sheet is provided.

  According to the present invention, since the sheet piece having elasticity can be held by the combined use of the locking force and the suction force, the degree of freedom in selecting the material of the sheet piece is increased. Also, the degree of freedom when changing the holding force is increased. Furthermore, since the amount of the locking member, which is generally an expensive material, can be reduced, it is economical. In addition, the sheet piece can be reliably transferred to the other holding member.

FIG. 1 is a schematic view showing an embodiment of a sheet transfer apparatus of the present invention. 2 (a) is a partially broken perspective view showing a sheet piece, and FIG. 2 (b) is a partially broken perspective view showing a part of a continuous sheet in a state before being cut into sheet pieces. FIG. 3A is a perspective view showing the holding head, and FIG. 3B is a plan view of the holding head shown in FIG. 3B viewed from the holding surface side, and the position with the elastic member. It shows the relationship. FIG. 4A is a plan view showing a holding head according to another embodiment, and FIG. 4B is a view of the holding head shown in FIG. 4A viewed from the end face in the longitudinal direction. FIG. 4C is a cross-sectional view taken along the line cc in FIG. 4B in a state where the sheet piece is held.

  The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows an embodiment of a sheet transfer apparatus of the present invention. The apparatus 1 shown in FIG. 1 includes a cutting unit 3 that intermittently cuts a continuous belt-like sheet 2 that is continuously conveyed, and a plurality of holding heads 41. The reversing device 4 rotating 90 degrees around an axis P perpendicular to the plane of each sheet piece 21 while being held and conveyed, and receiving the sheet piece 21 rotated 90 degrees from the holding head 41 of the reversing device 4 And transfer means 5 for joining to a band-shaped material sheet 52 which is another member.

  In the apparatus 1, a belt-shaped continuous sheet 2 manufacturing apparatus (not shown) is provided upstream of the reversing apparatus 4. The continuous sheet 2 conveyed from the manufacturing apparatus is guided by a guide roll (not shown) or the like and continuously supplied to the reversing device 4.

  As shown in FIG. 1, the reversing device 4 includes a substantially cylindrical rotating drum 42 that rotates in the direction of arrow R <b> 1 in FIG. 1, and the rotating drum 42 includes a plurality of holding heads 41 on the peripheral surface portion thereof. . The holding head 41 moves in one direction along the rotation direction R1 of the rotary drum 42. The holding head 41 has a holding surface 41a. On the holding surface 41a, the leaf-like sheet piece 21 generated by cutting the continuous belt-like sheet 2 is held, and in this state, it can be conveyed in the direction of the arrow R1. Has been made.

  In the apparatus 1, as shown in FIG. 1, the belt-like continuous sheet 2 is supplied onto the peripheral surface portion of the rotating drum 42, and the continuous sheet 2 is formed on the peripheral surface of the rotating drum 42. A cutter as a cutting means is arranged around the position where the holding head has been moved by about one. The cutter 3 is configured to be inserted between the holding heads 41 adjacent to each other along the rotation direction of the rotary drum 42 to cut the continuous sheet 2 in the width direction. In order to prevent interference with the moving holding head 41, the cutter 3 reciprocates so as to draw an elliptical orbit in the rotation surface of the rotary drum 42. In this elliptical orbit, the radial direction of the rotating drum 42 is the major axis of the ellipse.

  The suction heads 41 in the reversing device 4 are each rotated 90 degrees around an axis substantially perpendicular to the holding surface 41a, whereby the sheet piece 21 held on the holding surface 41a of the holding head 41 is moved to the sheet piece 21. And 90 degrees around an axis P perpendicular to the holding surface 41a.

  Further, each holding head 41 rotates in the direction of arrow R1 in FIG. 1 and measured along the distance between adjacent holding heads (the trajectory in which the holding head 41 moves in one direction that is the rotation direction of the rotary drum 42). The distance) is shortened or extended. That is, while each holding head 41 moves in a range from the introduction part A of the continuous sheet 2 to slightly beyond the cutting part B by the cutter 3, each holding head 41 is moved from a direction perpendicular to the holding surface 41a. When viewed, the longitudinal direction of the holding head is directed to the circumferential direction of the rotary drum 42 so that there is almost no gap between them, but it is slightly beyond the cutting portion B by the cutting roll 3. Thus, the distance between the holding heads slightly increases, and in this state, the 90-degree rotation of the head starts, and the distance between the holding heads further increases from the middle of the 90-degree rotation. Then, the sheet piece 21 is transferred in a state where the distance between the holding heads is increased from the beginning.

  The sheet piece 21 after the transfer functions as one of the components of the workpiece. In this manufacturing method, it is preferable that a plurality of types of workpieces having different sizes and functions can be processed. In this case, since the distance between the adjacent sheet pieces 21 along the rotation direction R1 varies depending on the type of the workpiece, the distance between the adjacent holding heads is smaller than the distance at the introduction portion A of the continuous sheet 2. It can be changed to either increase or decrease, and it is preferable that the pitch can be re-pitched at a desired interval. Here, the distance between adjacent holding heads is the distance between the end portions facing each other in adjacent holding heads along the rotation direction R1.

  After the transfer of the sheet piece 21 is completed, the distance between the holding heads decreases before the holding head 41 returns to the introduction portion A of the continuous sheet 2. In the meantime, each holding head 41 rotates 90 degrees around an axis substantially perpendicular to the holding surface 41a. The rotation direction at this time is opposite to the rotation direction of the holding head 41 before the sheet piece 21 is delivered, and the holding head 41 returns to the original position by this rotation.

  The change of the distance between the holding heads 41 and the rotation of the holding head 41 by 90 degrees in the reversing device 4 can be performed using a known method and apparatus, respectively. For example, as a method for changing the distance between the holding heads 41 and a method (and apparatus) for rotating the holding head 41, see JP-A-63-317576, JP-A-2003-135517, JP-A-3-226411, etc. The described methods and apparatus can be used. In addition, the movement of the holding head 41 provided in the reversing device 4 has a plurality of arms (not shown) having a coaxial rotation shaft and having an end on the opposite side of the rotation shaft or the vicinity thereof connected to each holding head. ) May be rotated. In this case, the rotation speed of each arm may be individually controlled by a servo motor or the like connected to the rotation shaft of each arm. As means for rotating the holding head 41 by 90 degrees around an axis substantially perpendicular to the holding surface 41a, a cam groove is provided in the vicinity of the track of the holding head 41, and a follower node connected to each holding head is provided in the cam groove. There is a method of inserting a protrusion and converting the reciprocating motion of the driven node generated as the holding head 41 moves into the rotational motion of the head by a known method. As the cam, a cylindrical cam, a plate cam, a front cam, or the like can be used. Further, instead of providing the cam groove, it is also possible to provide a ridge portion and slide the driven node.

  In the apparatus 1 of the present embodiment, the transfer of the sheet piece 21 is performed by an adhesive (not shown) previously applied to a predetermined position on the surface of the material sheet 52. Alternatively, transfer can also be performed by using a suction roll as the roll 51 provided in the transfer means 5 instead of or together with the adhesive. Furthermore, other known transfer means can be used without particular limitation.

  When a suction roll is used as the roll 51, the suction roll 51 rotates at a predetermined speed in the direction R2 in FIG. The suction roll 51 receives the sheet piece 21 via the material sheet 52 on its peripheral surface by sucking the air inside the roll and holding it in a negative pressure state. The suction roll 51 has a large number of holes on its peripheral surface. This hole is connected to suction means (not shown). By operating the suction means, the suction roll 51 can suck air from its peripheral surface toward the inside.

  FIG. 2A shows a perspective view of a sheet piece 21 to be transferred by the apparatus 1. The sheet piece 21 has a rectangular shape having a longitudinal direction and a width direction perpendicular thereto. The sheet piece 21 is obtained by folding a rectangular base sheet 21a in two and overlapping two sheets, and joining and fixing a plurality of elastic members 21b made of thread rubber or the like between the two sheets in an expanded state. The elastic member 21b includes a first elastic member 211b disposed over the entire length in the longitudinal direction of the base sheet 21a, and a second elasticity disposed only in the front and rear regions in the longitudinal direction of the base sheet 21a. Two types of members 212b are included. The 2nd elastic member 212b is not distribute | arranged to the center area of the longitudinal direction of the base material sheet 21a.

  In the base material sheet 21a folded in half, the opposing surfaces of the base material sheets 21a are joined by an adhesive applied to the elastic member 21b. In other words, in the sheet piece 21, the three of the folded base sheet 21a and the elastic member 21b are joined at a portion where the elastic member 21b exists. In the portion where the elastic member 21b does not exist, the base sheet 21a folded in half is in a non-bonded state. By being in such a joined state, the sheet piece 21 becomes a stretchable sheet that is soft and has good air permeability.

  The base material sheet 21a is comprised from fiber sheets, such as a nonwoven fabric and paper, and a shaping | molding film. When the base sheet 21a is composed of a fiber sheet, the sheet piece 21 generally has air permeability. When the base sheet 21a is formed of a molded film, it generally does not have air permeability, but it is microscopic depending on the macroscopic opening of the film or the constituent raw materials and manufacturing method of the film. Air permeability may be imparted by forming pores and imparting air permeability, although it is hardly liquid permeable. In addition, the sheet piece 21 can be expanded and contracted along the extending direction of the elastic member 21b by the action of the elastic member 21b disposed in an extended state. As a result, the sheet piece 21 has elasticity and has or does not have air permeability. Such a sheet piece 21 contributes to the improvement of the fitting property of this diaper by arrange | positioning this in the waist part of a disposable diaper, for example. In particular, when the sheet piece 21 has air permeability, not only the fit of the diaper is improved, but also the anti-steaming effect is improved.

  The sheet piece 21 can be expanded and contracted along the direction in which the elastic member 21b extends, which is the longitudinal direction thereof, but does not have elasticity in the width direction orthogonal to the direction. However, it is not impeded that the sheet piece 21 has elasticity in a direction orthogonal to the direction in which the elastic member 21b extends. In that case, the effect of the present invention is more conspicuous when the elastic force in the extending direction of the elastic member 21b is higher than the elastic force in the width direction orthogonal to the direction.

  FIG. 2B is a perspective view showing a part of the continuous sheet 2 in a state before the sheet piece 21 is cut into each leaf. The continuous sheet 2 is cut in a direction perpendicular to the extending direction of the continuous sheet 2 at a position C that bisects the second elastic member 212b in the length direction.

  FIG. 3A shows a perspective view of the holding head 41 provided in the apparatus 1. The holding head 41 includes a holding surface 41a on the upper surface thereof. The holding surface 41a has a longitudinal direction X and a width direction Y orthogonal thereto. The holding surface 41a is curved in a gentle convex shape along the width direction Y thereof. With respect to the longitudinal direction X, the holding surface 41a may be curved in a gentle convex shape.

  Locking portions 41b are provided at positions of the front end region and the rear end region along the longitudinal direction X of the holding surface 41a. The locking portion 41b forms a part of the holding surface 41a. The locking portion 41 b is configured to engage with the base material sheet 21 a that is a member constituting the sheet piece 21. For example, when the base material sheet 21a is composed of a fiber sheet, the engaging portion 41b is roughened so as to be engageable with the fiber sheet. The sheet piece 21 has its longitudinal direction aligned with the longitudinal direction X of the holding surface 41a and is extended, and the front end region and the rear end region along the extending direction are associated with each locking portion 41b. Stopped. The term “locking” refers to a state in which the sheet piece 21 is fixed by being hooked or pierced by the locking portion 41 b that is roughened and has a large number of convex portions. In a state where the sheet piece 21 is locked, a large resistance force due to the contraction force of the sheet piece 21 is generated in the locking portion 41b. Therefore, unless an external force is applied, the sheet piece 21 from the locking portion 41b. Misalignment and dropout are unlikely to occur. This resistance force is particularly increased when the sheet piece 21 is made of a fiber sheet. Further, since the sheet piece 21 is only caught by the locking portion 41b, the resistance force when peeling the sheet piece 21 in the direction perpendicular to the surface direction of the sheet piece 21 as when transferring the sheet piece 21 to the material sheet 52 is It is a small one.

  In order to roughen the locking portion 41b, for example, a hook member of a hook-and-loop fastener may be attached to the locking portion 41b. Moreover, the latching | locking part 41b can also be comprised from the thermal spraying member which has the roughening film formed on the surface by spraying a metal material or a nonmetallic material on the surface of a base material. This thermal spray member may be formed integrally with the holding head as a part of the holding head 41, or may be attached to the holding head 41 as a separate detachable member.

  Of the holding surface 41a, the front end region and the rear end region where the locking portion 41b is provided and the central region located between both regions are smoothly connected, and there is a step between these regions. Absent.

  In the holding surface 41a, a plurality of first suction holes 41c are provided in a portion where a locking portion 41b which is a part of the surface 41a is formed. In addition, a plurality of second suction holes 41d are provided in the region between the pair of locking portions 41b in the holding surface 41a. Each suction hole 41c, 41d is opened in the holding surface 41a and extends in the height direction of the holding head. Each suction hole 41c, 41d is connected to suction means (not shown) such as a suction pump. By operating the suction means, suction force is generated in the suction holes 41c and 41d, and the sheet piece 21 is sucked and held by the holding surface 41a. By adjusting the degree of suction by the suction means, the suction force by the suction holes 41c and 41d can be made variable. Further, by making the suction system to which the first suction hole 41c is connected and the suction system to which the second suction hole 41d is connected, a longitudinal central region on the holding surface 41a and the front end The suction force can be made different between the region and the rear end region, and furthermore, the suction force can be made different between the front end region and the rear end region by adjusting the suction system.

  The size, the number, and the arrangement position of the suction holes 41c and 41d are appropriately set in consideration of the air permeability and expansion / contraction force of the sheet piece 21 to be held. In particular, with respect to the arrangement position, for example, as shown in FIG. 3B, it is possible to provide the suction holes 41 c and 41 d at positions corresponding to the portions where the elastic member 21 b is arranged in the sheet piece 21. It is preferable from the viewpoint of more reliable holding. For the same purpose, relative to the position corresponding to the portion where the elastic member 21b is disposed in the sheet piece 21 in the locking portion 41b and / or in the portion between the locking portions 41b, relative to the other positions. A number of suction holes may be provided. Or you may arrange | position a suction hole along the direction where the elastic member 21b is extended in the latching | locking part 41b and / or the site | part between the latching | locking parts 41b.

  A method for transferring the sheet piece 21 using the apparatus 1 having the above configuration will be described. The continuous sheet 2 shown in FIG. 2B is guided by the above-described direction changing roll 91 and supplied to the rotating drum 42 that regularly rotates in the direction of the arrow R1. At this time, tension is applied to the continuous sheet 2 and the continuous sheet 2 is in an extended state. The continuous sheet 2 is held by the holding head 41 while the stretched state is maintained. Holding of the continuous sheet 2 is achieved by engagement between the locking portion 41b and the continuous sheet 2 and suction by the suction holes 41c and 41d. Even if the continuous sheet 2 is breathable or non-breathable, the holding of the continuous sheet 2 can be achieved to some extent only by suction. However, by employing engagement in addition to suction, there is an advantage that a wide variety of sheet pieces 21 can be reliably held. In particular, when the sheet piece 21 has elasticity as in the present embodiment, there is an advantage that a wide variety of sheet pieces 21 can be more reliably held by using a combination of suction and engagement. .

  The continuous sheet 2 is conveyed to the position of the cutter 3 while being held by the holding head 41, and is cut by the cutter intermittently in the longitudinal direction and over the entire region in the width direction at each cutting point. The length of the sheet 21 generated by cutting the continuous sheet 2 is substantially the same as or slightly larger than the length of the holding surface 41 a of the holding head 41 in the longitudinal direction.

  The sheet piece 21 generated by the cutting is held on the holding surface 41a such that the longitudinal direction (that is, the direction in which the elastic member 21b extends) coincides with the longitudinal direction X of the holding surface 41a of the holding head 41. Specifically, the front end region and the rear end region in the longitudinal direction of the sheet piece 21 and the respective engaging portions 41b are engaged and held, and the central region of the sheet piece 21 is held by the suction force by the suction hole 41c. Retained. Even in this state, the stretched state of the sheet piece 21 is maintained.

  The sheet piece 21 is conveyed while being held by the holding head 41, and is rotated 90 degrees around an axis P perpendicular to the plane of the sheet piece 21 by the rotation of the holding head 41 during the conveyance. In this case, since the sheet piece 21 is securely held on the holding surface 41a of the holding head 41 by a combination of suction force and engagement force, the sheet piece 21 is caused by wind pressure while the holding head 41 rotates 90 degrees. The inconvenience that the corners of the piece 21 turn up is effectively prevented. The sheet piece 21 rotated 90 degrees has a pitch between the holding heads 41 as compared with a state in which the longitudinal direction of the head when viewed from the direction perpendicular to the holding surface 41a is directed in the circumferential direction of the rotary drum 42, When the holding head 41 is rotated 90 degrees, the width direction of the head when viewed from the direction perpendicular to the holding surface 41 a is increased in the circumferential direction of the rotary drum 42. In the state where the distance between the holding heads 41 is increased, the sheet pieces 21, 21... Conveyed to the holding head 41 are supplied separately at the position of the suction roll 51 provided in the transfer unit 5. It is delivered to the surface of the sheet 52. Thus, the sheet piece 21 is regularly arranged at a predetermined interval in the longitudinal direction of the material sheet 52 with the width direction (short direction) before the 90-degree rotation coincides with the longitudinal direction of the material sheet 52. Is done. In this case, an adhesive is applied in advance to the surface of the sheet piece 21 and / or the material sheet 52, and both are bonded and fixed.

  When transferring the sheet piece 21 to the material sheet 52, the suction by the first suction hole 41c and / or the second suction hole 41d of the holding head 41 is stopped. By this operation, the holding of the sheet piece 21 to the holding head 41 by suction is released or the holding force is reduced, and the holding force of the sheet piece 21 by the holding head 41 is reduced. When a suction roll is used as the roll 51, the roll 51 is sucked inward from the peripheral surface in synchronization with the stop of the suction by the first suction hole 41c and / or the second suction hole 41d. An operation may be performed. By these operations, the transfer of the sheet piece 21 from the holding head 41 toward the suction roll 52 is reliably performed. In some cases, instead of stopping the suction by the first suction hole 41c and / or the second suction hole 41d, an operation of reducing the suction force of these suction holes 41c and 41d may be performed. .

  As the material sheet 52, for example, a fiber sheet such as a nonwoven fabric, a molded film, or the like can be used. The width of the material sheet 52 is not particularly limited, but is generally equal to or longer than the length of the sheet piece 21 in the longitudinal direction.

  As described above, when the apparatus 1 according to the present embodiment is used, the sheet piece 21 is held by the holding head 41 by the locking force using the locking portion 41b and the suction force using the suction holes 41c and 41d. Can do. Therefore, compared with the technique described in Patent Document 1 having only the locking part, even if the formation area of the locking part 41b is reduced, the same level of holding force as that of the technique described in the same document can be expressed. Since it is preferable that the locking portion 41b is composed of a thermal spray member that is an expensive material, reducing the area of the locking portion 41b is economically advantageous in manufacturing the holding head 41.

  Further, by making the suction force by the suction holes 41c and 41d variable, the overall holding force for holding the sheet piece 21 on the holding head 41 can be controlled. Therefore, when the sheet piece 21 is transferred to the material sheet 52, the holding force by suction is reduced, and the transfer can be performed reliably.

  In the above description, the apparatus 1 of the present embodiment is applied to a process of manufacturing the sheet piece 21 of each leaf from the continuous sheet 2 made of a belt-like continuous body and arranging the sheet piece on the material sheet 52. As a matter of fact, the present apparatus 1 is particularly suitable for manufacturing absorbent articles such as disposable diapers. Specifically, as the elastic sheet disposed around the waist of the disposable diaper, the above-mentioned material is used as the exterior sheet constituting the outer surface of the disposable diaper or the surface sheet constituting the inner surface of the diaper while using the sheet piece 21 described above. A disposable diaper can be manufactured by arranging the sheet piece 21 on the material sheet 52 using the sheet 52, and then sequentially arranging the absorbent body and the topsheet or the exterior sheet. it can.

  FIGS. 4A and 4B show another embodiment of the holding head 41. In the holding head 41 shown in the figure, a groove 41e along the holding surface 41a is formed on the surface of the locking portion 41b in the holding surface 41a. The groove 41e extends linearly in the same direction as the longitudinal direction X of the holding surface. One end of the groove 41e is connected to the opening end of the first suction hole 41c provided in the locking portion 41b. On the other hand, the other end of the groove 41e is open on the end face 41f in the longitudinal direction of the holding head 41, as shown in FIG. The groove portion 41e is connected to a portion of the first suction hole 41c provided in the locking portion 41b that is located closer to the end surface in the longitudinal direction of the holding head 41.

  When the sheet piece 21 is held on the holding surface 41a using the holding head 41 having such a structure, an air suction flow S along the groove 41e is formed as shown in FIG. The end region 21 ′ in the longitudinal direction of the piece 21 is attracted to the end surface 41 f in the longitudinal direction of the holding head 41. As a result, when the sheet piece 21 is being conveyed while being held by the holding head 21 until the sheet piece 21 is transferred to the material sheet 52, the end of the sheet piece 21 is turned up. Is more effectively prevented.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the above-described embodiment, the first suction hole 41c is provided in the locking portion 41b on the holding surface 41a, and the second suction hole 41d is provided between the pair of locking portions 41b. Only the first suction hole 41c or the second suction hole 41d may be provided. From the viewpoint of securely holding the sheet piece 21, the sheet piece 21 can be more reliably locked to the locking portion 41b together with the holding effect of the suction itself, so that at least the locking portion 41b on the holding surface 41a is sucked. It is effective to provide holes.

  In the embodiment, the holding head 41 rotates around the axis P perpendicular to the holding surface 41a until the sheet piece 21 held by the holding head 41 is transferred to the material sheet 52. The distance between adjacent holding heads 41 is shortened or extended, but only one of these operations may be performed instead.

  In the embodiment, the sheet piece 21 held by the holding head 41 is transferred to the material sheet 52 which is another member. Instead, the sheet piece 21 is transferred separately from the transfer device 1. The image may be transferred to another apparatus provided in the apparatus.

DESCRIPTION OF SYMBOLS 1 Transfer apparatus 2 Continuous sheet 21 Sheet piece 21 'The edge part area | region of the longitudinal direction of the sheet piece 21 3 Cutting means 4 Inversion apparatus 4
41 holding head 41a holding surface 41b locking part 41c first suction hole 41d second suction hole 41e groove part 41f end face 42 rotating drum 5 transfer part 51 suction roll 52 material sheet

Claims (7)

A sheet piece having an elastic member , which is held in a stretched state on a holding surface of a holding head having a longitudinal direction and a width direction perpendicular to the longitudinal direction, and having elasticity, is maintained in the stretched state with another member or In the transfer device for the sheet transferred to the device,
Wherein the pair of locking portions for locking the front region and rear region along the extending direction of the sheet piece, provided at a position of the front end region and the rear end region along the longitudinal direction definitive the holding surface of the holding head, and wherein A suction hole for sucking and holding the sheet piece is provided on the holding surface,
The suction hole is provided at a position corresponding to a portion of the sheet piece where the elastic member is disposed,
A groove portion along the holding surface is formed on the surface of the locking portion, and one end of the groove portion is connected to the opening end of the suction hole, while the other end of the groove portion is connected to the holding head. Open at the longitudinal end face,
A sheet transfer apparatus in which a length of the sheet piece is larger than a length in a longitudinal direction of the holding surface of the holding head .   The sheet transfer device according to claim 1, wherein the locking portion includes a thermal spray member having a roughened coating formed on a surface of a base material by thermal spraying a metal material or a non-metal material.   The sheet transfer apparatus according to claim 1, wherein a suction force by the suction hole is variable.   The sheet transfer device according to claim 1, wherein the suction hole is provided in the locking portion.   The sheet transfer device according to claim 1, wherein the suction hole is provided between the locking portions.   2. The holding head is configured to rotate about an axis perpendicular to the holding surface until the sheet piece held by the holding head is transferred to another member or apparatus. The sheet transfer apparatus according to any one of Items 5 to 5. A plurality of holding heads, each holding head is adapted to move in one direction;
The distance between adjacent holding heads is shortened or extended until the sheet piece held by each holding head is transferred to another member or apparatus. The sheet transfer apparatus according to 1.

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