JPH10129636A - Cutting device for outermost layer of machine glazed paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which can surely cut the packing material and the outermost paper of the outer peripheral face of machine glazed. SOLUTION: A cutting head 12 is supported by a carriage 14 parallelly transferring to machine glazed paper 1. The cutting head 12 is provided with a front side skewer 34 entering the paper and scraping up the packing material 2, a rotary cutter blade 40 cutting the packing material 2, rear side skewer 34A being located behind the skewer 34 and entering the paper 1 and scraping up the surface layer paper 1a, and a rotary cutter blade 40A for cutting the surface layer paper 1a scraped up by the rear side skewer 34A. And the cutting head 12 is transferred parallelly to the axial line of the paper 1 to cut at first the packing material by the front side skewer 34 and the rotary cutter blade 40, and then cut the surface layer paper by the rear side skewer 34A and the rotary cutter blade 40A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper skin cutting apparatus for cutting the roll paper skin in the axial direction. Here, the roll paper is not limited to only paper with a strict meaning, but means a roll of a web of paper, plastic film, or the like. Further, the skin means a packaging material covering the peripheral surface of the roll paper, and several papers on the surface of the roll paper, that is, a surface paper, and the packaging materials include kraft paper, paperboard, and plastic sheet. And various packing materials.

[0002]

2. Description of the Related Art In general, roll paper used in a rotary printing press is transported with its peripheral surface and end surface covered by packing materials such as kraft paper, paperboard, and vinyl chloride resin sheet. Then, in order to put the packed roll paper on a rotary printing press, first remove the packaging material on both end faces of the roll paper, then remove the packaging material on the peripheral face, and then remove the surface paper from the roll paper. The leading edge of the paper connected to the roll paper side is cut into an appropriate shape (for example, a V-shape) to form a paper edge, an adhesive layer is formed on the paper edge, and then the paper edge is removed. The paper is rewound on roll paper and temporarily fixed to the surface of the roll paper using a non-raveling tab, so as to make a paper splice.

[0003] Among these tailoring operations, in order to efficiently remove the peripheral packaging material and the surface paper, after removing the packaging material on the end face, the packaging material on the outer periphery of the roll paper and the surface paper are removed along the axis. In this direction, the roll paper may be cut across the entire width, and the packing material and the surface layer paper may be removed together. Accordingly, the present applicant has developed a device capable of simultaneously cutting the skin (the packing material and the surface paper) of the rolled paper after removing the end face packing material in the axial direction, and has filed a patent application (Japanese Patent Application Laid-Open No. Hei 8-8300). No. 40426, "Apparatus for cutting skin on rolls").

As shown in FIG. 11, the apparatus according to the above application includes a cutting head 12 for cutting the skin, a carriage 14 holding the cutting head 12 and moving in a direction parallel to the axis of the roll paper 1, The electric cylinder 2 for positioning the cutting head 12 by moving it in the radial direction with respect to the roll paper 1
The cutting head 12 is provided with a skin 4 (packing material 2 and 4) to be cut from the end face of the roll paper 1 when the cutting head 12 is moved in the axial direction with respect to the roll paper 1. It is inserted under the surface paper 1a) and its skin 4
Spatula (hereinafter referred to as skewers) 34 and skewers 3
A rotary blade 40 for cutting the skin 4 scooped up by 4 is provided. The cutting operation by this device is performed as follows. That is, the electric cylinder 22 is
Is advanced in the direction of the roll paper 1 so that the leading end of the skewer 34 is positioned at a desired position in the radial direction with respect to the roll paper 1, and then the carriage 14 travels in the direction of arrow X to move the cutting head 12 to the roll paper 1. 1 is moved parallel to the axis.
Thereby, the tip of the skewer 34 cuts into the inside of the skin 4 to be cut on the end face of the roll paper 1 and proceeds while scooping up the skin 4, as shown in FIG. 12, and the rotary blade 40 cuts the skin. I will do it. In this way, the roll paper packaging material and the surface layer paper can be cut simultaneously over the entire length of the roll paper. Here, the skewer 34 and the rotary blade 40
Is configured to be movable in the radial direction of the roll paper with respect to the cutting head 12 during the cutting operation, and the unevenness of the paper surface existing in the roll paper when the skewer 34 advances in the roll paper 1 It is possible to follow.

[0005]

However, although the apparatus having the above-described structure has an advantage that the packaging material and the surface paper can be cut at the same time, there is a point to be further improved. found. That is, although the skewer 34 and the rotary blade 40 can be moved in the radial direction of the roll paper with respect to the cutting head 12 so as to be able to follow irregularities on the paper surface in the roll paper, depending on the roll paper, During the progress between the papers, the paper above or below the paper could be pierced. For example, in the process of inserting the skewers 34 into the correct position inside the surface paper and cutting the skewers 34, the skewers 34 pass through the surface paper positioned above the paper and reach the boundary between the paper and the packing material. Because the material is strong, it cannot penetrate through the packaging material, and may travel between the book and the packaging material and cut only the packaging material. In this case, as shown in FIG. 13A, in the roll paper 1 after the cutting, the surface layer paper 1a is cut partway, but the subsequent portion is not cut, and therefore, the surface layer paper 1a is cut. Removal becomes difficult. Conversely, while the skewer 34 is moving, the skewer 34 may pierce the book below it,
In this case, as shown in FIG. 13 (b), the packing material 2 and the surface paper 1a are cut, but a part of the paper 1b thereunder is also cut, and the paper 1b in this portion is also cut. It has to be pulled out and removed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and ensures that the packaging material of the roll paper and the surface layer paper do not pierce the paper under the roll over the entire width of the roll paper. It is an object of the present invention to provide a roll paper skin cutting device capable of cutting.

[0007]

Means for Solving the Problems The present inventors have studied the cause of the skewer inserted inside the surface paper (between the papers) in the above-described conventional apparatus and sticking into the paper above or below the paper. As a result, they found that this was caused by the presence of the packing material. In other words, since the packing material on the peripheral surface of the roll paper is strong, when the skewer is inserted, the paper on and above the skewer is tightened, so that the friction when the skewer moves is large. However, the skewer may push the paper above or below forward, but the paper in front of the skewer cannot be moved because it is tightened by the packing material, eventually causing the paper to slack in front of the skewer, A skewer pierced the slack and pierced the book. In addition, when the skewer enters the unevenness or wrinkles existing in the paper, the paper of the unevenness or wrinkles cannot be escaped because the paper is restrained by the packing material, and the skewer is not covered by the unevenness or wrinkles. Pierced the book, and again broke through the book. Therefore, the above problem can be solved by cutting open the packing material and releasing the fastening of the book before cutting the surface book.

The present invention has been made based on such knowledge, and two sets of a skewer and a cutting blade are provided on a cutting head so as to be arranged back and forth with respect to the moving direction of the cutting head. First, the packing material is cut with a skewer and a cutting blade, that is, a forward skewer and a forward cutting blade, which are arranged in front, and the surface paper under the cut position of the packaging material is moved rearward. And a cutting blade, that is, a rear skewer and a rear cutting blade. According to the present invention, when the rear skewer is inserted into the inside of the surface paper and the scooping up the surface paper is performed, the packing material on the surface paper is cut off,
The packing material does not restrain the surface paper, so the frictional force of the rear skewer on the paper is small, and the upper and lower papers are hardly pushed in when the rear skewer advances, and even if the paper is pushed in. As a result, it is possible to escape to the end of the rear skewer without hindrance. For this reason, the rear skewer can smoothly advance between the book and the book, so that the rear skewer does not pierce the upper or lower book and cause trouble.
Therefore, the packaging material and the surface layer paper can be reliably and satisfactorily cut over the entire width of the roll paper by one travel of the cutting head.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A roll paper skin cutting apparatus according to the present invention is for cutting a skin made of a roll paper packaging material set at a predetermined position and a surface layer paper in the axial direction. A head, a carriage holding the cutting head and moving in a direction parallel to an axis of the roll paper, and the cutting head and the roll paper such that the cutting head is at a predetermined position in a radial direction with respect to the roll paper. Radial positioning means for relatively positioning the roll paper and the cutting head is inserted inside the packing material of the roll paper when the cutting head moves parallel to the axis with respect to the roll paper for skin cutting. A leading skewer for scooping the packing material, a leading cutting blade for cutting the scooped packing material, and a cutting blade positioned behind the leading skewer and inserted inside the surface paper of the roll paper and the surface paper thereof A rear skewer scooping, characterized in that it comprises a rear cutting blade for cutting the surface newspaper that the rear skewer scooped.

According to the present invention, with the above construction, the radial positioning means positions the cutting head at a predetermined position in the radial direction with respect to the roll paper, and the carriage moves the cutting head parallel to the axis of the roll paper, so that the leading skewer is moved. It is inserted into the inside of the packing material from the end of the roll paper, advances while scooping up the packing material, the cutting blade on the front side cuts the packing material that has been picked up, and then the rear skewer moves from the end surface of the roll paper to the cutting position of the packing material. By being inserted inside the lower surface paper and moving forward while scooping the surface paper, the rear cutting blade cuts the raised surface paper, so that the cutting head travels once along the roll paper, This has the effect that the packing material and the surface paper can be cut reliably and satisfactorily over the entire width of the roll paper. Here, the leading skewer is inserted inside the packing material around the roll paper to scoop up the packing material. At this time, the insertion position of the leading skewer (inside the packing material) is determined by the packing material and the outer periphery of the roll paper. However, the present invention is not limited to this, and it is also possible to set the space between the book paper of the outer layer portion of the roll paper located inside the packing material and the paper sheet and a small amount of the book paper at the same time.

In practicing the present invention, the front skewer, the front cutting blade, the rear skewer, the rear cutting blade, etc. may be configured to be fixed at a predetermined position with respect to the cutting head. It is preferable that the roll paper be configured to be movable in the radial direction. For example, the leading skewer and the leading cutting blade are held by the leading slide unit held in the cutting head frame so as to be movable in the radial direction of the roll paper,
Further, it is preferable that the rear skewer and the rear cutting blade are held by a rear slide unit held by the frame of the cutting head so as to be movable in the radial direction of the roll paper. With this configuration, when the leading skewer advances inside the packing material, even if the roll paper has irregularities on the surface, the roll can follow the irregularities and move with less damage to the paper, As the skewer advances inside the surface paper, even if the paper at the position where the rear skewer enters has irregularities, it can follow the irregularities and move, causing damage to the paper above and below the rear skewer. Absent.

In practicing the present invention, the forward skewer is preferably made of a relatively hard material such as metal, wood or bamboo, and the rear skewer is preferably made of a synthetic resin having an appropriate flexibility. The forward skewer moves while scooping up a high-strength packing material. Therefore, the forward skewer is required to have sufficient strength. By using metal, wood, or bamboo, the required strength can be ensured and the life can be extended. On the other hand, the rear skewer moves inside the surface paper after the packaging material is cut open, so it does not require much strength, and it is made of synthetic resin, so it can be scooped up without trouble and can be used for a long time And
Moreover, the rear skewer made of synthetic resin is difficult to stab the paper above and below it, and the coefficient of friction against the paper is small, so it can proceed smoothly between the paper and the paper, preventing the paper from being stabbed and damaged from this point. it can.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention shown in the drawings will be described below. FIG. 1 is a schematic plan view of a roll paper skin cutting apparatus according to one embodiment of the present invention, and the same or similar parts as those in the conventional example shown in FIGS. In FIG. 1, reference numeral 10 denotes the entire skin cutting apparatus. The skin cutting device 10 of this embodiment is provided in a tailoring device (not shown) as disclosed in Japanese Patent Application Laid-Open No. Hei 4-44940. , And is used to cut the skin 4 made of the packing material 2 on the outer peripheral surface and the surface paper 1a.
Numeral 6 denotes a rotatable roll paper 1 and a skin cutting device 1.
This is a chucking arm that can be positioned at a predetermined position suitable for cutting by zero.

The skin cutting apparatus 10 includes a cutting head 12 for cutting the skin and a carriage 14 which holds the cutting head 12 and moves in a direction parallel to the axis of the roll paper 1 held by the chucking arm 6. Have. The carriage 14 is movably held by a guide rod 15 provided in parallel with the axis of the roll paper 1 and is connected to a drive chain 16. The carriage 14 can reciprocate right and left by the drive chain 16. Carriage 14 and drive chain 1
6 is provided with a load detecting means 17 such as a load cell for detecting the tension acting on the drive chain 16 when the skin is cut, and a load for moving the carriage 14 due to a cutting failure or the like at the time of cutting. When it changes, it can be detected.

The carriage 14 has a slide bearing 19.
A pair of guide rods 20 are held movably in the radial direction with respect to the roll paper 1 set at a predetermined position, and a cutting head 12
Is attached. The carriage 14 also holds an electric cylinder 22 connected to the cutting head 12.
Thus, the electric cylinder 22 allows the cutting head 12
Can be moved in the radial direction with respect to the roll paper 1 and can be stopped at an arbitrary position and held at that position. The electric cylinder 22, the guide rod 2
The slide bearing 19 and the like are provided on the carriage and constitute a head moving device that moves the cutting head in the radial direction with respect to the roll. Cutting head 12
A roll paper position detection sensor 24 for detecting the position of the cutting head 12 in the radial direction with respect to the outer peripheral surface of the roll paper in contact with the outer peripheral surface of the roll paper 1 and detecting the outer peripheral surface position of the roll paper. Have been. Thus, by controlling the electric cylinder 22 based on the signal from the roll paper position detection sensor 24, the cutting head 12 can be positioned so as to be at a predetermined radial position with respect to the roll paper 1. In other words, the head moving device and the detecting means are arranged so that the cutting head is positioned at a predetermined position in the radial direction with respect to the roll-shaped material. Configure means. The radial positioning means does not necessarily need to be configured to move the cutting head 12 side in the radial direction of the roll paper 1.
The positioning may be performed by moving the. However, it is easier to perform positioning by moving the cutting head 12 as in the illustrated embodiment, and the roll paper 1 is positioned at a desired position with respect to the process after cutting the skin. This is preferable because

The cutting head 12 has a frame 26 fixed to the guide rod 20, and the frame 26 has
Moving direction of cutting head 12 during cutting operation (arrow X
The front cutting part 13 located in the front with respect to (direction) and the rear cutting part 13A located in the rear are provided.

As shown in FIGS. 2 to 6, the leading cut portion 13 includes a guide rod 27 attached to the frame 26 in parallel to the guide rod 20, and thus in the radial direction of the roll paper 1, and the guide rod 27. Is provided with a front slide unit 28 movably held at the front end. The front slide unit 28 includes a slide block 31 movably supported by a guide rod 27 via a slide bearing 29, a skewer mount 33 rotatably mounted on the slide block 31 by a pin 32, and one end thereof. And a forward skewer 34 fixed to the This skewer 34
Is inserted under the packing material 2 to be cut from the end face of the roll paper 1 (inside) when the cutting head 12 is moved parallel to the roll paper 1 in the axial direction, and the packing material 2 is picked up. And is arranged such that the leading end faces the end face of the roll paper 1 and is parallel to the axis of the roll paper 1. The pin 32 is provided for adjusting the angle of entry of the forward skewer 34 with respect to the roll paper 1. Further, a vertical wall 33a is provided at the center of the upper end on the back surface of the skewer attachment 33, and adjustment bolts 36 attached to the slide block 31 are pressed on both sides thereof. The adjusting bolt 36 allows the skewer attachment 33
Is rotated by a small angle around the pin 32,
Can be adjusted to be exactly parallel to the axis of the roll paper 1.

The forward skewer 34 has a shape shown in FIGS. 7 to 9 and has a thin flat portion 34a at the tip, and an inclined guide surface 34b for scooping up packing materials, book paper, etc. behind the forward skewer 34. , And a flat bottom surface 34c. The flat portion 34a is provided so that when the forward skewer 34 advances inside the packing material of the roll paper, it can follow the unevenness of the roll paper and bend, and usually has a thickness. 0.5
１．２1.2 mm and a length of 3-8 mm. Further, the tip of the flat portion 34a is chamfered so as not to damage the roll paper. Flat bottom 34c
Also, when the forward skewer 34 moves inside the packing material, it is provided so as to be able to move stably while following irregularities on the roll paper, and is usually made to have a length of 20 to 50 mm. If the length is too long, the ability to follow the unevenness of the roll paper deteriorates. If the length is too short, the frictional resistance to the roll paper increases, which is not preferable. In the center of the guide surface 34b, a groove 3 into which a rotary blade described later enters is provided.
4d is formed. The forward skewer 34 can move forward while scooping up the strong packaging material 2.
Usually made of hard materials such as metal, wood, bamboo and the like.

In FIG. 1 to FIG.
1 holds a guide rod 37 parallel to the guide rod 27, and the guide rod 37 has a gear box 3
8 is movably held. Furthermore, the slide block 31 holds a micrometer head 39 connected to the gear box 38, and the gear box 38 is fixed to the slide block 31 by the micrometer head 39 and its position can be finely adjusted. And Therefore, normally, the gear box 38 is movable along the guide rod 27 integrally with the slide block 31 and forms a part of the front slide unit 28. A front cutting blade composed of a rotary blade 40 is attached to the output shaft of the gear box 38 so as to be located in a groove 34d (see FIG. 5) formed in the front skewer 34. Joint 4 whose direction distance can be changed
1 through the drive motor 42 held by the frame 26
Are connected. Thus, even when the slide block 31 and the gear box 38 move integrally along the guide rod 27, the rotary blade 40 can be rotationally driven by the drive motor 42 without any trouble. , Front skewer 34 attached to slide block 31
The gap between the blade and the rotary blade 40 attached to the gear box 38 is always kept constant. The gap between the forward skewer 34 and the rotary blade 40 is an important factor in sharpness when cutting the skin, but in this embodiment, the gap can be finely adjusted by the micrometer head 39, and the sharpness condition is good. Settings can be made.

Further, a clamp pin 45 is attached to the slide block 31 in a direction perpendicular to the guide rod 27 which movably holds the slide block 31, and the clamp pin 4 is attached to the frame 26.
A front clamp device 47 having a pair of clamp claws 47a and 47b for clamping the front end 5 is attached. The front clamp device 47 includes a pair of clamp claws 47a, 4
The clamp unit 45 can be clamped by opening and closing the guide rod 37 in a direction parallel to the guide rod 37 and symmetrically. By opening the pair of clamp claws 47a and 47b, the slide unit 28 is connected to the guide rod 2.
7 and a pair of clamp claws 4
By closing 7a and 47b, the slide unit 2
8 can be fixed at a fixed position in the direction along the guide rod 27 and thus at a fixed position relative to the frame 26.

In FIG. 1, a rear cutting unit 13A provided on the cutting head 12 has the same configuration as the front cutting unit 13, and is provided with a rear slide unit 28A held movably in the radial direction of the roll paper. And a rear skewer 34A attached to the rear slide unit 28A, a rear cutting blade composed of a rotary blade 40A, a rear clamp device 47A for fixing the rear slide unit 28A at a fixed position with respect to the frame 26, and the like. Here, the rear skewer 34A is inserted under (inside) the surface paper 1a of the roll paper 1 when the cutting head 12 moves parallel to the axis with respect to the roll paper 1 for cutting the skin, and the surface paper 1a is cut. The structure is the same as that of the forward skewer 34. However, the rear skewer 34A is usually made of a soft material such as a synthetic resin such as nylon. When such a soft material is used, since it has appropriate elasticity, there is obtained an advantage that the roll material moves well following irregularities of the roll paper and hardly damages the roll paper. A synthetic resin such as nylon has a small frictional resistance to roll paper, and is also preferable from this point.

The forward skewer 3 provided on the cutting head 12
4 and the rear skewer 34A are attached to the front slide unit 28 and the rear slide unit 28A by the front clamp device 47 and the rear clamp device 47A, respectively.
6, the rear skewer 34A is closer to the center of the roll paper 1 than the front skewer 34 by the thickness of the surface paper to be cut (for example, about 0.5 mm). Stipulated.

Next, the operation of the skin cutting apparatus 10 having the above configuration will be described. The following operation is automatically performed by a sequencer (not shown). In FIG. 1, when the roll paper 1 after removing the packing material at both ends is sent, the chucking arm 6 rises while holding the roll paper 1, and a predetermined amount for the cutting operation by the skin cutting device 10. Set to position. At this time, the skin cutting device 10
The cutting head 12 stands by near the end face of the roll paper 1 and at a position slightly away from the outer periphery thereof. Further, the forward clamping device 47 clamps the clamping pin 45, and accordingly, the forward slide unit 28 and the forward skewer 34
Is fixed at a fixed position with respect to the frame 26.
Similarly, the rear clamp device 47A also clamps the clamp pin to fix the rear slide unit 28A and the rear skewer 34A at a fixed position with respect to the frame 26.

Next, the electric cylinder 22 is operated to advance the cutting head 12 in the direction of the roll paper 1. When the cutting head 12 advances, the roll paper position detection sensor 24 provided on the cutting head 12 hits the outer peripheral surface of the roll paper 1 and detects the radial position of the outer peripheral surface of the roll paper 1. Roll paper position detection sensor 24 used here
Is a displacement sensor, and when the cutting head 12 has gone too far, it is possible to know how much the cutting head 12 has gone too far.

The insertion position of the leading skewer 34 with respect to the end face of the roll paper is input to the sequencer in advance, and the sequencer controls the electric cylinder 22 based on a signal from the roll paper position detection sensor 24 to control the cutting head 12. Positioning is performed so that the leading end of the forward skewer 34 is at a desired position in the radial direction with respect to the roll paper 1. Thereby, the forward skewer 34
The rear skewer 34A is in the state shown in FIG. In other words, the tip of the forward skewer 34 is separated from the outer surface of the packing material 2 by a distance d corresponding to the thickness of the packing material 2 or a distance d obtained by adding an appropriate margin (for example, about 1 to 3 sheets of book paper). , Located inward in the radial direction,
A has its tip located radially inward from the tip of the forward skewer 34 by a distance t substantially equal to the thickness of the surface layer paper 1a to be removed.

Thereafter, in FIG. 1, the drive chain 16 runs in the direction of the arrow X, and moves the carriage 14 in the direction of the arrow X. By this movement, the cutting head 12 also moves the roll paper 1
First, the leading end of the forward skewer 34 cuts into the inside of the packing material 2 to be cut on the end surface of the roll paper 1, and the packing material 2 (strictly, not only the packing material 2 but also A small amount of this paper may be included inside, but for convenience of description, the packing material 2 is scooped up, and the rotary blade 40 cuts the packing material 2. When the forward skewer 34 has cut into the roll paper 1 by an appropriate length, for example, the length corresponding to the flat bottom surface 34c, the forward skewer 47 is released, and as shown in FIG. 34 and rotary blade 40
Slide unit 28 holding the guide rod 2
7, the leading skewer 34 moves along the roll paper 1 in this state, and the rotary blade 40 cuts the packaging material 2 open.

As shown in FIG. 10 (b), as the forward skewer 34 advances while scooping up the packing material 2, the front end of the rear skewer 34A is next attached to the end surface of the roll paper 1 and the surface book paper 1a to be cut. Digging into the inside of the surface book
a is scooped up, and the rotary blade 40A cuts the packing material 2. When the rear skewer 34A has been cut into the roll paper 1 by an appropriate length, the rear skewer 34A
A is released, and the rear slide unit 28A holding the rear skewer 34A and the rotary blade 40A becomes movable. In this state, the rear skewer 34A moves along the roll paper 1 and cuts open the surface layer paper 1a.

As described above, the forward skewer 34 and the rotary blade 4
0 cuts the packing material 2 first, and then
4A and the rotary blade 40A cut the surface paper 1a at the portion where the packaging material 2 was cut, and over the entire width of the roll paper 1,
The packaging material 2 and the surface paper 1a can be cut.

At the time of this cutting operation, the leading skewer 34 advances between the packing material 2 and the book paper under the packing material 2 or inside the book paper on the surface layer. Although the surface portion of the roll paper 1 often has irregularities of about 1 mm, the leading skewer 34 can move in the radial direction of the roll paper 1, so that it follows the irregularities of the roll paper 1 well. In many cases, the sheet travels at a predetermined position (between the packing material 2 and the book paper under the packing material 2 or in the book paper on the surface layer). However, the leading skewer 34 is fastened by the strong packing material 2 so that the leading skewer 34 pierces the book sheet above or below it in some cases,
May break through. However, even if the forward skewer 34 breaks through the upper book, the packing material 2 thereon is strong, so that the packing material 2 does not break through the packing paper 2 and thus does not fall out. Can be reliably cut over the entire width of the sheet. Conversely, even if the lower book is pierced, the book is cut by the succeeding rear skewer 34A and rotary blade 40A, so that there is no problem.

Next, the rear skewer 34A advances between the surface paper 1a and the paper below it. This position also has irregularities of about 1 mm.
Is made of a soft material, has an appropriate elasticity, and is movable in the radial direction of the roll paper 1, so that it can follow the unevenness of the roll paper 1 satisfactorily. Move smoothly between the papers. Moreover, at this position, since the packing material 2 has already been cut and the surface paper has not been tightened, the rear skewer 34A moves between the paper and the paper more smoothly, and the surface paper on the upper side is scooped up and rotated. It can be sent to the blade and cut. Thus, the rear skewer 34A pierces the book underneath and damages it.
There is no possibility that a cutting defect will not occur due to a breakthrough of the upper surface book paper.

After the cutting head 12 moves over the entire width of the roll paper 1 and cuts the packaging material 2 and the skin 4 consisting of the surface layer paper 1a over the entire width, the leading clamp device 47 and the rear clamp device 47A operate. Then, the front slide unit 28 and the rear slide unit 28A are fixed at fixed positions with respect to the frame 26, respectively, the electric cylinder 22 returns the cutting head 12 to the outside of the roll paper 1 in the radial direction, and the carriage 14 returns to the original standby position (FIG. (Position shown in 1)
Prepare for the next operation. On the other hand, on the roll paper 1 after the skin 4 has been cut, a tailoring operation is performed similarly to the apparatus disclosed in Japanese Patent Application Laid-Open No. 4-44040.

In the above embodiment, the rotating blades 40 and 40A are used as the leading and trailing cutting blades, respectively, but a fixed blade may be used instead of the rotating blade.
In that case, a fixed blade may be formed at the center end of the upper surface of the front skewer and the rear skewer. In the above embodiment, the front skewer 34 is held by the front slide unit 28, and the rear skewer 34A is held by the rear slide unit 28A. However, the present invention is not limited to this configuration. The forward skewer 34 and the rear skewer 34A may be held by one slide unit, and may be movable together in the radial direction of the roll paper. One or both of 34A may be fixed to the frame 26 so as not to move in the radial direction of the roll paper. In the case where the main paper of the surface layer portion of the roll paper has few irregularities, it is possible to cut the skin excellently even with such a configuration. Furthermore, in the above embodiment, the case where the skin cutting device of the present invention is incorporated into a roll paper tailoring device has been described as an example. However, the present invention is not limited to this case, and may be a device that performs only skin cutting. .

[0033]

As is apparent from the above description, according to the skin cutting apparatus of the present invention, the leading skewer inserted into the inside of the packing material of the roll paper to scoop up the packing material, and the leading skewer to the cutting head. A cutting blade for cutting the scooped packing material, a rear skewer positioned behind the front skewer, inserted inside the surface paper of the roll paper to scoop up the surface paper, and a surface paper slid up by the rear skewer. When the cutting head is moved in parallel with the axis along the roll paper, the first skewer and the first cutting tool arranged in the front cut the packing material by moving the cutting head along the roll paper. 2) that the rear skewer and the rear cutting blade, in which the surface layer paper below the position where the packaging material is cut, are arranged rearward, are cut.
A stage cutting operation can be performed, and when the rear skewer is inserted inside the surface paper and scoops up the surface paper,
Since the packaging material on the surface paper is cut away, the packaging material does not restrain the surface paper, so that the rear skewer progresses extremely smoothly, and the rear skewer pierces the upper and lower papers. Therefore, there is an effect that the packaging material and the surface layer paper can be cut satisfactorily and reliably over the entire width of the roll paper by one travel of the cutting head.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a roll paper skin cutting apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of a forward cutting portion of the cutting head in the embodiment.

FIG. 3 is a schematic sectional view of the cutting head shown in FIG. 2 as viewed in the direction of arrows AA.

FIG. 4 is a schematic cross-sectional view of the cutting head shown in FIG. 2 as viewed in the direction of arrows BB.

FIG. 5 is a schematic side view of a part of the cutting head shown in FIG. 2 as viewed from a clamp device side.

FIG. 6 is a schematic plan view showing a part of the cutting head shown in FIG. 2 in a state where a packaging material is being cut;

FIG. 7 is a schematic top view of the forward skewer used in the above embodiment.

FIG. 8 is a schematic side view of the forward skewer.

FIG. 9 is a schematic front view of the leading skewer.

FIG. 10A is a schematic side sectional view showing a state in which a front skewer and a rear skewer are positioned in the radial direction of the roll paper in the above embodiment. FIG. A schematic side sectional view showing a state before insertion and before insertion of a rear skewer into a roll paper end face.

FIG. 11 is a schematic plan view of a conventional roll paper skin cutting apparatus.

12 is a schematic plan view showing a part of the cutting head of the skin cutting apparatus shown in FIG. 11 in a state where the skin is being cut;

13A and 13B are schematic perspective views each showing a state of a cutting failure that occurs when the skin of roll paper is cut by a conventional apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll paper 1a Surface book paper 2 Packing material 4 Skin 6 Chucking arm 10 Skin cutting device 12 Cutting head 13 Forward cutting section 13A Rear cutting section 14 Carriage 16 Drive chain 20 Guide rod 22 Electric cylinder 26 Frame 27 Guide rod 28 Front slide unit 28A rear slide unit 31 slide block 33 skewer attachment 34 front skewer 34A rear skewer 40 rotary blade (front cutting blade) 40A rotary blade (rear cutting blade) 42 drive motor 45 clamp pin 47 front clamp device 47A rear clamp device 47a 47b Clamp claw

Claims (3)

[Claims] 1. A skin cutting device for cutting a skin made of a packaging material of roll paper set at a predetermined position and a surface layer paper in an axial direction, comprising: a cutting head; and a roll holding the cutting head. A carriage moving in a direction parallel to the axis of the paper, and radial positioning means for relatively positioning the cutting head and the roll paper so that the cutting head is at a predetermined position in the radial direction with respect to the roll paper. When the cutting head moves parallel to the axis with respect to the roll paper for cutting the skin, a tip skewer inserted inside the packing material of the roll paper to scoop up the packing material,
A front cutting blade for cutting the packing material that the front skewer has scooped up, a rear skewer positioned behind the front skewer and inserted inside the surface paper of the roll paper to scoop up the surface paper, and the rear skewer being scooped up A roll paper skin cutting device, comprising a rear cutting blade for cutting a surface layered paper. 2. A skin cutting device for cutting, in an axial direction, a skin made of a packaging material of roll paper set in a predetermined position and a surface layer paper, said cutting head and said roll holding said cutting head. A carriage moving in a direction parallel to the axis of the paper, and radial positioning means for relatively positioning the cutting head and the roll paper so that the cutting head is at a predetermined position in the radial direction with respect to the roll paper. Wherein the cutting head comprises a frame,
A forward slide unit movably held in a radial direction of the roll paper, and the roll is attached to the forward slide unit, and the roll is moved when the cutting head moves parallel to the roll paper for cutting the skin. A leading skewer inserted under the paper packing material to scoop up the packaging material, and a leading cutting blade to cut the packaging material scooped up by the leading skewer;
A front clamp device for fixing the front slide unit at a fixed position with respect to the frame;
A rear slide unit that is positioned behind the front land unit and movably held in a radial direction of the roll paper, and is attached to the rear slide unit, and the cutting head is mounted on the roll paper for skin cutting. A back skewer inserted under the surface paper of the roll paper to scoop up the surface paper when moving in parallel with the axis,
A rear cutting blade that cuts the surface paper sheet that the rear skewer has scooped up, and a rear clamp device that fixes the rear slide unit at a fixed position with respect to the frame, wherein the front slide unit and the rear slide unit are each the front clamp device When the rear clamp device is fixed at a fixed position with respect to the frame, the rear skewer is configured to be closer to the center of the roll paper by the thickness of the surface layer paper than the front skewer. Roll paper skin cutting device. 3. The apparatus according to claim 1, wherein the front skewer is made of metal, wood or bamboo, and the rear skewer is made of synthetic resin.