Sticking machine

Abstract

To provide a sticking machine that can elevate register accuracy of a mount warp and a cover sheet and can easily acquire double-sided sticking paper having good appearance and high quality.SOLUTION: A sticking machine 1 that holds two cover sheets 11, 12 on a pair of sticking drums 60, 61, respectively and simultaneously laminates and sticks the cover sheets 11, 12 on front and rear faces of one mount 10 along with a rotation of the pair of sticking drums 60, 61 is equipped with: a pasting transportation part 3 for transporting the mount 10 while pasting on the front and rear faces; and a sticking part 6 where the pair of sticking drums 60, 61 are provided rotatably in the reverse direction to each other at vertical positions and simultaneously laminating and sticking rear faces of the respective cover sheets 11, 12 rotationally supplied by the pair of sticking drums 60, 61, on front and rear faces of the mount 10 supplied by the pasting transportation part 3. The sticking drums 60, 61 are provided with gripper devices 62, 63 for holding tips of the cover sheets 11, 12, and rotationally feed the cover sheets 11, 12 while being held by the gripper devices 62, 63 along a drum surface.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to laminating machine technology, and more specifically to a laminating machine that holds two covers on a pair of laminating drums, and overlaps and simultaneously adheres each cover to the front and back surfaces of a single mount as the pair of laminating drums rotate. [Background technology]

[0002] Conventionally, there has been known a configuration of a laminating machine that overlaps and adheres a relatively thin cover, such as printed paper or a sheet, to a relatively thick backing, such as cardboard or corrugated cardboard. As disclosed in Patent Documents 1 and 2, for example, a conventional laminating machine has a configuration in which a cover, cut to a predetermined size and glued on the backside, is held on a laminating drum, and as the laminating drum rotates, the backside of the cover is overlapped and adhered to a backing that has also been cut to the predetermined size.

[0003] This type of conventional laminating machine is composed of a cover supply section that supplies covers one by one at a predetermined timing, a laminating drum section that holds covers with glue on the back side on a laminating drum (suction drum) and rotates and feeds them in one direction, a backing paper supply section that supplies backing paper one by one at a predetermined timing, and a laminating section that overlaps the backing paper supplied from the backing paper supply section with the backing paper of the cover that has been rotated and fed by the laminating drum section and pastes them together.

[0004] Incidentally, because a normal offset printing machine cannot print directly on a thick mount, there are cases where thin paper (cover) is first printed and then pasted onto the mount to create a laminate. As for laminates, there are those in which the cover is pasted onto only one side of the mount (single-sided pasting) and those in which the cover is pasted onto both the front and back sides of the mount (double-sided pasting). In particular, double-sided pasting not only prevents the pasted paper from warping during pasting, as occurs when using styrene board as the mount, but also makes it possible to make the texture and feel of the front and back sides uniform, and is therefore adopted appropriately depending on the use of the pasted paper.

[0005] However, the conventional laminating machines disclosed in the above-mentioned Patent Documents 1 and 2 are configured as laminating machines for single-sided lamination, in which a cover is attached to one side of a mount. Therefore, in order to obtain a double-sided laminated paper in which a cover is attached to both sides (front and back) of the mount using such a laminating machine, lamination processing is required for each side of the mount. Not only is the processing process complicated, but there are also problems such as the mount warping during processing or insufficient positioning (registration) of the cover on the front and back sides, resulting in an unattractive appearance of the resulting laminated paper and poor finished quality. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Jikko No. 49-35039 [Patent Document 2] Jikko No. 56-39627 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the present invention aims to solve the above-mentioned conventional problems with respect to laminating machines, and to provide a laminating machine that can improve the accuracy of warping of the backing paper and registration of the cover, and can easily produce attractive, high-quality double-sided laminated paper. [Means for solving the problem]

[0008] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0009] That is, in claim 1, the laminating machine holds two covers on a pair of laminating drums, and as the pair of laminating drums rotates, overlaps and adheres each cover to the front and back sides of a single backing sheet, comprising: a gluing conveying section that conveys the backing sheet while gluing it to the front and back sides; and a laminating section in which the pair of laminating drums are arranged in vertical positions so that they can rotate in opposite directions relative to each other, and overlaps and adheres the back sides of each cover, which has been rotated and fed by the pair of laminating drums, to the front and back sides of the backing sheet supplied from the gluing conveying section; the laminating drum is provided with a gripper device that holds the leading edge of the cover, and the cover is rotated and fed along the drum surface while held by the gripper device.

[0010] In claim 2, the gripper device is provided with a plurality of gripper members arranged along the axial direction of the laminating drum so as to be able to protrude / retract from the drum surface of the laminating drum, and when the plurality of gripper members are retracted from the drum surface of the laminating drum, they clamp and hold the leading edge of the cover between the drum surface and the gripper members.

[0011] In claim 3, the gripper device is interlocked with the rotation of the laminating drum, and the plurality of gripper members are projected at a position where the leading edge of the cover is superimposed on the backing sheet.

[0012] In claim 4, the gripper member is provided with a shaft portion that protrudes from the drum surface of the laminating drum and against which the leading edge of the cover abuts, and a pressing portion that is arranged at the end of the shaft portion and presses the leading edge of the cover against the drum surface of the laminating drum when the gripper member is stored against the drum surface of the laminating drum.

[0013] In claim 5, the gripper members are arranged at positions such that the opposing gripper members of the pair of laminating drums do not overlap each other in the vertical direction along the axial direction of the laminating drums. [Effects of the Invention]

[0014] The effect of the present invention is to improve the accuracy of warping of the mount and registration of the cover, and to easily obtain a high-quality double-sided laminated paper that looks good. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a side view showing the overall configuration of a bonding machine according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 2 is an enlarged side cross-sectional view of the gripper device. [Figure 5] 1A to 1C are diagrams illustrating a lamination process using a lamination machine according to the present embodiment. [Figure 6] 10A and 10B are diagrams showing a lamination process using the lamination machine of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Next, an embodiment of the present invention will be described. In the following embodiments, the arrow X direction in Fig. 1 is the front-rear direction, the arrow Y direction is the up-down direction, and the arrow Z direction in Fig. 3 is the left-right direction.

[0017] First, the overall configuration of the laminating machine 1 of this embodiment will be outlined below. As shown in FIG. 1, the bonding machine 1 of this embodiment is configured as a three-sheet simultaneous bonding machine for double-sided bonding, in which one backing sheet 10, which is relatively thick such as styrene interleaf paper or corrugated cardboard interleaf paper, is overlapped with two cover sheets 11 and 12, which are relatively thin such as printed paper or sheets, and bonded together. Specifically, it is configured with a backing sheet supply section 2 that supplies the backing sheets 10, which have been cut to a predetermined size, one by one at a predetermined timing, a gluing conveying section 3 that conveys the backing sheets 10 supplied from the backing sheet supply section 2 while applying glue to the front and back sides of the backing sheets 10, upper and lower cover sheet supply sections 4 and 5 that supply the cover sheets 11 and 12, which have been cut to a predetermined size, one by one at a predetermined timing, and a bonding section 6 that holds the cover sheets 11 and 12 supplied from the cover sheet supply sections 4 and 5 on a pair of laminating drums 60 and 61, and overlaps the back sides of the cover sheets 11 and 12 transferred and fed by the laminating drums 60 and 61 onto the front and back sides of the backing sheet 10 supplied from the gluing conveying section 3, and bonds them together.

[0018] 1 and 2, the backing sheet supply unit 2 is disposed at the frontmost position of the device, and supplies the uppermost backing sheet 10 of a large number of stacked backing sheets 10 downstream in the conveying direction (from the left side of the paper to the right side of the paper in FIG. 1). The backing sheet supply unit 2 of this embodiment is configured using a front-end regulation system, and specifically includes a transport conveyor 20 disposed along the front-rear direction, on which backing sheets 10 supplied one by one from a supply device (not shown) are placed and transported, and a front-rear position adjustment unit 21 disposed behind the transport conveyor 20, which adjusts the front-rear position of the backing sheet 10.

[0019] The conveyor 20 is configured as a belt conveyor that is stretched rotatably along the front-rear direction and is wound endlessly around rollers 20a and pulleys 20b that are arranged horizontally in the front-rear direction. On the conveyor 20, the backing sheet 10 is sent downstream in the conveying direction while being pressed by a plurality of pressure rollers 22 arranged above the conveyor 20.

[0020] The front-to-rear position adjustment unit 21 positions (aligns) the backing paper 10 in the front-to-rear direction, and specifically includes a front contact plate 23 arranged at the rear of the transport conveyor 20 and configured to be able to abut against the front end of the backing paper 10, and a pressure roller 25 arranged at a position above the connecting plate 24 so that it can swing up and down.

[0021] The front contact plate 23 is disposed on a swing arm 26 below a connecting plate 24 provided at the edge of the transport conveyor 20, and is provided at multiple locations along a direction (left-right direction) perpendicular to the transport direction of the backing paper 10. The front contact plate 23 can be swung up and down by the swing arm 26, and the front end of the front contact plate 23 protrudes upward through the opening of the connecting plate 24, causing the backing paper 10 to come into contact with the front contact plate 23 and stop, and the front end is retracted downward from the opening, causing the backing paper 10 to be sent to the glueing transport section 3.

[0022] The pressure rollers 25 are provided at multiple locations along a direction (left-right direction) perpendicular to the conveying direction of the backing paper 10, and the backing paper 10 transported by the transport conveyor 20 is positioned (aligned) by the front-to-back position adjustment section 21, and then the pressure roller 25 is moved downward and sandwiched between the pressure roller 25 and the connecting plate 24, and sent to the glued conveying section 3 described later.

[0023] In the backing sheet supply section 2, the drive of the transport conveyor 20 (rotation speed and drive timing) and the up and down movement of the front support plate 23 (oscillating arm 26) are suitably controlled to serve as the basis for the transport of covers 11 and 12 by the cover supply sections 3 and 4 described below.

[0024] As shown in Figures 1 and 2, the gluing conveying section 3 is arranged in front of the laminating section 6 (on the left side in Figure 1), which will be described later, and applies glue to the front and back surfaces of the backing paper 10 supplied from the backing paper supply section 2. Specifically, the gluing conveying section 3 is provided with a pair of upper and lower gluing rollers 32 and 33 which contact the front and back surfaces of the backing paper 10 supplied from the backing paper supply section 2 while being pressed by a pair of supply rollers 31 and 31 along a supply plate 30, thereby transferring the glue; a glue application roller 34 which is arranged so as to be able to move towards or away from one of the gluing rollers 32 and which applies glue to the front surface (glue surface); and a glue application roller 35 which is arranged so as to be able to move towards or away from the other gluing roller 33 and which applies glue to the front surface (glue surface).

[0025] A glue supply unit (not shown) is provided above the gluing roller 32 and the glue application roller 34, and a fixed amount of glue is supplied to the glue application roller 34 via the glue supply unit. The glue application roller 34 approaches the upper gluing roller 32 and the two rollers rotate in opposite directions, thereby applying glue with uniform pressure to the surface (glue surface) of the gluing roller 32. Excess glue falls from the gluing roller 32 and the glue application roller 34 and accumulates in a tray 36 provided below. The glue accumulated in the tray 36 is supplied to the glue application roller 35, and the glue application roller 35 approaches the lower gluing roller 33 and the two rollers rotate in opposite directions, thereby applying glue with uniform pressure to the surface (glue surface) of the gluing roller 33.

[0026] The glue application rollers 34 and 35 apply glue to the entire surface (glue surface) of the pair of gluing rollers 32 and 33, so that the backing paper 10 supplied through the supply plate 30 comes into contact with the glue surface of the upper gluing roller 32 on its front side and the glue surface of the lower gluing roller 33 on its back side, and as the pair of gluing rollers 32 and 33 rotate, the glue is transferred and the backing paper 10 is sent out, and then sent to the laminating section 6 (where the pair of laminating drums 60 and 61 are separated), which will be described later.

[0027] 1 and 2, the cover sheet supply units 4 and 5 are each located at the frontmost position of the apparatus, behind the laminating unit 6, which will be described later, and supply the uppermost cover sheets 11 and 12 of a large number of cover sheets 11 and 12 stacked face up to the downstream side in the conveying direction (from the right side of the paper to the left side of the paper in FIG. 1). In this embodiment, the cover sheet supply units 4 and 5 are configured identically except for their vertical arrangement, unless otherwise noted, so in the following embodiment, the cover sheet supply unit 4 located in the upper position will be described, and a detailed description of the cover sheet supply unit 5 located in the lower position will be omitted.

[0028] The cover supply section 4 is configured using a front end regulation system, and specifically includes a transport conveyor 40 arranged along the front-to-back direction on which covers 11 supplied one by one from a supply device not shown are placed and transported, and a front-to-back position adjustment section 41 located behind the transport conveyor 40 to adjust the front-to-back position of the cover 11.

[0029] The conveyor 40 is configured as a belt conveyor that is stretched rotatably along the front-rear direction and is wound endlessly around rollers 40a and pulleys 40b that are arranged horizontally in the front-rear direction. On the conveyor 40, the cover 11 is pressed by a plurality of pressure rollers 42 arranged above the conveyor 40 and sent downstream in the conveying direction.

[0030] The front-to-rear position adjustment section 41 positions (aligns) the front and rear directions of the cover 11, and specifically includes a front contact plate 43 arranged at the front of the conveying conveyor 40 and configured to be able to abut against the front end of the cover 11, a feed roller 45 whose roller surface is exposed upward through an opening in the connecting plate 44, and a pressure roller 46 arranged above the feed roller 45 so that it can swing up and down.

[0031] The front contact plate 43 is disposed below a connecting plate 44 provided at the edge of the transport conveyor 40 so as to be able to swing up and down, and is provided at multiple locations along a direction (left and right direction) perpendicular to the transport direction of the cover sheet 11. When the front contact plate 43 swings up and down, the leading end protrudes upward through the opening of the connecting plate 44, causing the cover sheet 11 to come into contact with the front contact plate 43 and stop, and when the leading end retracts downward from the opening, the cover sheet 11 is sent to (the laminating roller 60 of) the laminating unit 6, which will be described later.

[0032] The feed rollers 45 are arranged in a direction (left-right direction) perpendicular to the conveyance direction of the cover 11, and the roller surfaces exposed upward through the openings come into contact with the cover 11, while the pressure rollers 46 are provided at multiple locations in a direction (left-right direction) perpendicular to the conveyance direction of the cover 11. The cover 11 conveyed by the conveyor 40 is positioned (registered) by the front-rear position adjustment unit 41, and then the feed rollers 45 are driven, so that the cover 11 is sandwiched between the feed roller 45 and the pressure roller 46 and sent to (the laminating roller 60 of) the laminating unit 6, which will be described later.

[0033] Like the cover supply unit 4 described above, the cover supply unit 5 is configured to employ a front-end regulation system, and is provided with a transport conveyor 50 that is arranged in the front-to-rear direction and that places and transports the covers 12 supplied one by one from a supply device (not shown), and a front-to-rear position adjustment unit 51 that adjusts the front-to-rear position of the cover 12 at a position in front of the transport conveyor 50. The cover 12 transported by the transport conveyor 50 is positioned (registered) by the front-to-rear position adjustment unit 51, and then the feed roller 55 is driven, and the cover 12 is sent to the laminating unit 6 (laminating roller 61) described below while being sandwiched between the feed roller 55 and the pressure roller 56.

[0034] In the cover supply units 4 and 5, the drive (rotation speed and drive timing) of the feed rollers 45 and 55 is controlled in conjunction with the transport of the backing sheet 10 by the above-mentioned backing sheet supply unit 3, and the drive of the feed rollers 45 and 55 is controlled so that the leading ends of the covers 11 and 12 overlap at a predetermined position on the backing sheet 10 and are simultaneously pasted at the laminating position P2 (see Figure 6) of the laminating unit 6 described later.

[0035] As shown in Figures 1 to 4, the laminating unit 6 is located approximately in the center of the device and simultaneously overlaps and laminates the back surfaces of the covers 11 and 12, which are rotated and fed by a pair of laminating drums 60 and 61, onto the front and back surfaces of the backing sheet 10. Specifically, it is provided with a pair of laminating drums 60 and 61 arranged vertically so as to be able to rotate in opposite directions, and gripper devices 62 and 63 arranged along the axial direction on part of the outer periphery of the laminating drums 60 and 61 and which hold the leading ends of the covers 11 and 12.

[0036] In this embodiment, the laminating drums 60 and 61 are configured identically except for their vertical arrangement and rotation direction, unless otherwise specified. Therefore, in the following embodiment, the laminating drum 60 and gripper device 62 (gripper member 64) disposed in the upper position will be described, and a detailed description of the laminating drum 61 and gripper device 63 (gripper member 65) disposed in the lower position will be omitted.

[0037] The laminating drum 60 is supported by a horizontal shaft 60a disposed in the left-right direction, and can rotate leftward (counterclockwise in FIGS. 1 and 2) by driving the horizontal shaft 60a. A notch 60b is formed in part of the outer periphery of the laminating drum 60 along the axial direction, and a gripper device 62 is provided inside at a position downstream in the rotation direction from the notch 60b.

[0038] 3 and 4, the gripper device 62 is provided with a plurality of gripper members 64 (10 in this embodiment, see FIG. 3) that are arranged along the axial direction of the laminating drum 60 so as to be able to protrude from / retract into the drum surface of the laminating drum 60. The gripper members 64 are configured as pin-shaped members, and are arranged, for example, at predetermined intervals along the axial direction of the laminating drum 60, and are slidably attached via attachment members 62b in attachment holes of a fixing member 62a arranged inside the laminating drum 60.

[0039] The gripper member 64 is composed of a shaft portion 64a against which the leading end of the cover sheet 11 abuts when protruding from the drum surface of the laminating drum 60, and a pressing portion 64b that is disposed at the end of the shaft portion 64a and presses the leading end of the cover sheet 11 toward the drum surface of the laminating drum 60 when the gripper member 64 is stored against the drum surface of the laminating drum 60. When the gripper member 64 is attached to the fixing member 62a, the end of the shaft portion 64a and the pressing portion 64b protrude toward the drum surface side beyond the attachment member 62b.

[0040] The shaft portion 64a is formed in a generally cylindrical shape with a circular cross section and is inserted into the above-mentioned mounting member 62b. The pressing portion 64b is formed in a generally disk shape with a circular cross section whose radial length is longer than the diameter of the shaft portion 64a and is disposed at one end of the shaft portion 64a that protrudes toward the drum surface from the mounting member 62b. A pressing member 64c is disposed at the other end of the shaft portion 64a that protrudes toward the drum interior from the mounting member 62b, and the gripper member 64 is urged in a direction in which it is accommodated against the drum surface of the laminating drum 60 by a spring member 64d disposed between the mounting member 62b and the pressing member 64c.

[0041] The gripper device 62 is connected to a pushing mechanism (not shown) that pushes the gripper member 64 in conjunction with the rotation of the laminating drum 60, and when the pushing member 64c is pushed by the pushing mechanism, the end of the shaft portion 64a and the pressing portion 64b are protruded from the drum surface of the laminating drum 60 against the biasing force of the spring member 64c, thereby protruding the gripper member 64. When the gripper member 64 is in the protruding state, the leading end of the cover sheet 11 supplied from the paper supply unit 4 abuts against the shaft portion 64a (see FIG. 4(a)).

[0042] Furthermore, when the pushing of the pushing member 64c by the above-mentioned pushing mechanism is released, the biasing force of the spring member 64d causes the end of the shaft portion 64a and the pressing portion 64b to be stored against the drum surface of the laminating drum 60, thereby storing the gripper member 64. When the gripper member 64 is stored, the front end of the cover sheet 11 abutting against the shaft portion 64a is pressed against the drum surface of the laminating drum 60 by the pressing portion 64b, and the front end is held so as to be sandwiched between the shaft portion 64a and the drum surface.

[0043] The laminating drum 61 can rotate in the opposite direction to the laminating drum 60 in the right direction (clockwise in FIGS. 1 and 2) by driving a horizontal shaft 61a disposed in the left-right direction, and is disposed side by side in the vertical direction so as to be spaced apart from the laminating drum 60. The gripper device 63 of the laminating drum 61, like the gripper device 62 described above, is provided with a plurality of gripper members 65 arranged along the axial direction of the laminating drum 61 so as to be able to protrude / retract into / from the drum surface (ten in this embodiment, see FIG. 3), but the opposing gripper members 64 / 65 on the laminating drums 60 / 61 are disposed at positions that are offset along the axial direction of the laminating drums 60 / 61 and do not overlap in the vertical direction (see FIG. 3).

[0044] In the laminating section 6, the covers 11 and 12 are held by gripper devices 62 and 63 with their front surfaces facing the drum surface, and are rotated and fed along the drum surfaces of the laminating drums 60 and 61. The covers 11 and 12 rotated and fed by the laminating drums 60 and 61 are superimposed from above and below on the front and back surfaces of the backing paper 10 transported from the gluing transport section 3 to the space between the laminating drums 60 and 61, and are then pressed against the outer periphery (drum surface) of the laminating drums 60 and 61 and pressure-fed, so that the covers 10 and 11 and 12 are laminated together by the pressing force of the laminating rollers 60 and 61 to obtain the desired laminated paper 13.

[0045] The pasted paper 13 in the pasting section 6 is sent to the discharge section 7 located at the rear of the device, and is placed on the conveyor of the conveying section 7 and conveyed while being pressed by a pressure belt, and then conveyed out of the machine.

[0046] Next, the laminating process performed by the laminating machine 1 of this embodiment will be described in detail below. As shown in Figures 1, 6 and 7, in the bonding machine 1 of this embodiment, first, in the backing paper supply section 2, backing papers 10 supplied from a supply device not shown are placed one by one on a transport conveyor 20 and transported, and after being positioned (front register) by the front-to-back position adjustment section 21, they are supplied to the gluing transport section 3 (see Figure 1).

[0047] In the gluing conveying section 3, the backing paper 10 supplied from the backing paper supply section 2 is brought along the supply plate 30 into contact with the adhesive surfaces of a pair of gluing rollers 32, 33 via supply rollers 31, 31, and the adhesive is transferred to the front and back surfaces of the backing paper 10 as the pair of gluing rollers 32, 33 rotate, and the backing paper 10 is then conveyed to the laminating section 6 (where the pair of laminating drums 60, 61 are separated) (see Figure 5(b)).

[0048] In addition, in the cover supply section 4 / 5, the covers 11 / 12 supplied from a supply device (not shown) are transported one by one on the transport conveyors 40 / 50, and are positioned (front register) by the front-rear position adjustment sections 41 / 51 before being supplied to the laminating section 6 (each laminating drum 60 / 61) (see Figure 5(a)).

[0049] In the laminating unit 6, the feed speed of the covers 11 and 12 from the cover supply units 4 and 5 is synchronized with the peripheral speed of the laminating drums 60 and 61, and when the gripper devices 62 and 63 of the laminating drums 60 and 61 are positioned in holding position P1, the leading edges of the covers 11 and 12 supplied from the cover supply units 4 and 5 come into contact with the shafts 64a and 65a of the gripper members 64 and 65 that protrude from the drum surfaces of the laminating drums 60 and 61 (Fig. 5(b)). At this time, the gripper members 64 and 65 of the gripper devices 62 and 63 are retracted, and as the gripper members 64 and 65 are retracted against the drum surfaces of the laminating drums 60 and 61, the leading edges are pressed by the pressing sections 64b and 65b, and the covers 11 and 12 are held by being sandwiched between the drum surfaces of the laminating drums 60 and 61 (see Fig. 3).

[0050] In the laminating section 6, the covers 11 and 12 are held against the drum surfaces of the laminating drums 60 and 61 by the gripper devices 62 and 63 (i.e., the leading ends of the covers 11 and 12 are held by the gripper devices 62 and 63), and as the laminating drums 60 and 61 rotate, the covers 11 and 12 are rotated and fed while abutting against the peripheral surfaces of the laminating drums 60 and 61.

[0051] In the laminating section 6, the feed speed of the backing sheet 10 from the gluing conveying section 3 is synchronized with the peripheral speed of the laminating drums 60 and 61, so that when the gripper devices 62 and 63 of the laminating drums 60 and 61 reach laminating position P2, the backsides of the leading edges of the covers 11 and 12 are superimposed on the front and back sides of the backing sheet 10 supplied from the gluing conveying section 3 and are simultaneously adhered to each other (see Fig. 6(a)). At this time, the gripper members 64 and 65 of the gripper devices 62 and 63 protrude, releasing the grip on the covers 11 and 12. The covers 11 and 12 together with the backing sheet 10 are then pressed together against the outer surfaces of the laminating drums 60 and 61 and fed under pressure, and are then conveyed out of the machine as a laminated sheet 13 from the discharge section 7 (Fig. 6(b)).

[0052] As described above, the laminating machine 1 of this embodiment holds two covers 11 and 12 on a pair of laminating drums 60 and 61, respectively, and overlaps and simultaneously adheres each cover 11 and 12 to the front and back surfaces of one mount sheet 10 as the pair of laminating drums 60 and 61 rotate. The laminating machine 1 includes a gluing conveying section 3 that conveys the mount sheet 10 while gluing the front and back surfaces of the mount sheet 10, and a pair of laminating drums 60 and 61 that are arranged vertically so as to be rotatable in opposite directions relative to each other. The front and back surfaces of the mount sheet 10 supplied from the gluing conveying section 3 are applied with glue by the pair of laminating drums 60 and 61. and a laminating section 6 which simultaneously overlaps and laminates the backsides of each cover sheet 11·12 fed and rotated by 60·61. The laminating drums 60·61 are provided with gripper devices 62·63 which hold the leading ends of the cover sheets 11·12, and the cover sheets 11·12 are fed and rotated along the drum surface while being held by the gripper devices 62·63. This improves the accuracy of the curling of the backing paper 10 and the registration of the cover sheets 11·12, making it easy to obtain a high-quality double-sided laminated paper 13 which looks good.

[0053] That is, the laminating machine 1 of this embodiment is configured to simultaneously overlap and laminate the back surfaces of two covers 11 and 12 onto one backing sheet 10, the front and back surfaces of which have been glued in the gluing and conveying section 3, in the laminating section 6, so that a double-sided laminated sheet 13 in which covers 11 and 12 are laminated to both sides (front and back) of the backing sheet 10 can be obtained at once through a simple process, and by laminating the covers 11 and 12 simultaneously, warping of the backing sheet 10 can be prevented. Also, since the pair of laminating drums 60 and 61 is configured so that the gripper devices 62 and 63 hold the leading ends of the covers 11 and 12 and feed them along the drum surfaces, the feeding accuracy of the covers 11 and 12 is high, and they can be positioned (registered) accurately relative to the backing sheet 10, resulting in a high-quality laminated sheet 13.

[0054] In particular, the gripper devices 62 and 63 of this embodiment are provided with a plurality of gripper members 64 and 65 arranged along the axial direction of the laminating drums 60 and 61 so that they can protrude from / be stored in the drum surface of the laminating drums 60 and 61, and when the plurality of gripper members 64 and 65 are stored in the drum surface of the laminating drums 60 and 61, they clamp and hold the leading ends of the covers 11 and 12 between themselves and the drum surface.As a result, the gripper devices 62 and 63 can securely hold the covers 11 and 12 supplied to the laminating drums 60 and 61 at a predetermined position (holding position), and the covers 11 and 12 can be stably rotated and fed along the drum surface.

[0055] In addition, the gripper devices 62 and 63 are linked to the rotation of the laminating drums 60 and 61, and multiple gripper members 64 and 65 are protruded at the position where the leading ends of the covers 11 and 12 are overlapped on the backing paper 10. This allows the gripper devices 62 and 63 to release their hold on the covers 11 and 12 at a predetermined position (laminating position), ensuring that the covers 11 and 12 are securely adhered to the backing paper 10.

[0056] Furthermore, the gripper members 64, 65 are provided with shaft portions 64a, 65a against which the leading ends of the covers 11, 12 abut when protruding from the drum surfaces of the laminating drums 60, 61, and pressing portions 64b, 65b that are disposed at the ends of the shaft portions 64a, 65a and press the leading ends of the covers 11, 12 against the drum surfaces of the laminating drums 60, 61 when retracted against the drum surfaces of the laminating drums 60, 61. As a result, the gripper members 64, 65 can be simply configured while the gripper devices 62, 63 can securely hold the covers 11, 12 and stably rotate and feed the covers 11, 12 along the drum surfaces.

[0057] Furthermore, the gripper members 64 and 65 of the pair of laminating drums 60 and 61 are positioned such that the opposing gripper members 64 and 65 do not overlap in the vertical direction along the axial direction of the laminating drums 60 and 61. Therefore, even when the gripper members 64 and 65 protrude from the drum surfaces of the laminating drums 60 and 61, the opposing gripper members 64 and 65 do not interfere with the rotation of the pair of laminating drums 60 and 61, and the covers 11 and 12 can be reliably adhered to the backing sheet 10 at the predetermined position (laminating position).

[0058] The configuration of the laminating machine 1 is not limited to the above-described embodiment, and various modifications are possible without departing from the object of the present invention.

[0059] That is, in the bonding machine 1 of the above-mentioned embodiment, the backing sheet supply section 2 and the cover sheet supply section 4 / 5 are described as being configured to adopt a leading end determination method, but the configuration of the backing sheet supply section 2 and the cover sheet supply section 4 / 5 is not limited to this, and for example, either one or both may be configured to adopt a leading end determination method, or may be configured to adopt a trailing end determination method.

[0060] Furthermore, in the laminating machine 1 of the above-mentioned embodiment, the configuration has been described in which the gripper members 64, 65 are attached to the fixed members 62a, 63a, etc. of the gripper devices 62, 63 in the laminating section 6, but the arrangement of the gripper members 64, 65 is not limited to this, and it is sufficient if the gripper members 64, 65 are configured to be able to protrude / retract into the drum surfaces of the laminating drums 60, 61.

[0061] Furthermore, in the laminating machine 1 of the above-described embodiment, the laminating unit 6 has been described as having the cutout portions 60b and 61b in the laminating drums 60 and 61, but the configuration of the laminating drums 60 and 61 is not limited to this, and for example, the laminating drums 60 and 61 may be formed in the shape of a circular roll without the cutout portions 60b and 61b. [Explanation of symbols]

[0062] 1 Laminating machine 2. Backing paper supply unit 3 Glue conveying section 4·5 Cover supply unit 6. Laminating section 7. Unloading section 10 Mount 11·12 cover 13 Laminating paper 20 Transport conveyor 21 Fore / aft position adjustment section 23 Front plate 24 Connecting plate 25 Pressure roller 26 Swing arm 30 Supply plate 31 Supply roller 32·33 Glue roller 34·35 Glue application roller 36 Saucer 40·50 Transfer conveyor 41·51 Front-rear position adjustment section 43·53 Front plate 44·54 Connecting plate 45·55 Feed roller 46·56 Pressure roller 60·61 Laminating drum 60a·61a Horizontal axis 60b·61b Notch 62·63 Gripper device 62a·63a Fixing member 62b·63b Mounting parts 64·65 Gripper member 64a・65a Shaft part 64b·65b Pressing part 64c·65c Pushing member 64d·65d Spring material

Claims

1. A laminating machine in which two covers are held on a pair of laminating drums, respectively, and the covers are superimposed on the front and back surfaces of a single mount and simultaneously adhered to each other as the pair of laminating drums rotate, a glue application and transport section that applies glue to the front and back surfaces of the mount while transporting the mount; a laminating section in which the pair of laminating drums are arranged in a vertical position so as to be rotatable in opposite directions relative to each other, and the backsides of the covers fed by the pair of laminating drums are simultaneously superimposed on the front and back sides of the mount supplied from the gluing conveying section and laminating them; and The laminating drum is provided with a gripper device for holding the leading edge of the cover sheet, and the cover sheet is rotated and fed along the drum surface while being held by the gripper device. A laminating machine characterized by the above.

2. 2. The laminating machine according to claim 1, wherein the gripper device is provided with a plurality of gripper members arranged along the axial direction of the laminating drum so as to be able to protrude / retract from the drum surface of the laminating drum, and when the plurality of gripper members are retracted from the drum surface of the laminating drum, they clamp and hold the leading edge of the cover between the drum surface and the gripper members.

3. 3. The laminating machine according to claim 2, wherein the gripper device is interlocked with the rotation of the laminating drum, and the plurality of gripper members are projected at a position where the leading edge of the cover is superposed on the backing sheet.

4. 4. The laminating machine according to claim 2 or 3, wherein the gripper member is provided with: a shaft portion with which the leading edge of the cover comes into contact when protruding from the drum surface of the laminating drum; and a pressing portion that is disposed at the end of the shaft portion and presses the leading edge of the cover toward the drum surface of the laminating drum when the gripper member is stored against the drum surface of the laminating drum.

5. 4. The laminating machine according to claim 2 or 3, wherein the gripper members are arranged at positions such that the opposing gripper members of the pair of laminating drums do not overlap each other in the vertical direction along the axial direction of the laminating drums.

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