JPH09104414A - Folding-line making device for packaging paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a folding line in a sheet over the whole length of it in a sending direction without snaking. SOLUTION: After a sheet A is let off to the downstream side of a sending passage B for a predetermined distance by a delivery means 3, a press roller 5 is made to approach a sending roller 4 so as to pinch a head end part A1 of the sheet A by a predetermined pressure in the cross direction unmovably, so that the sheet A is linearly sent to a first roller 1 and a second roller 2 along a sending passage B by the rotation of the sending roller 4. In a state that a part of the sheet A is pinched by the press roller 5 and the sending roller 4, a head end edge A2 of the sheet A proceeds in between a V-shaped protrusion 1a of the first roller 1 and a V-shaped groove 2a of the second roller 2 under entirely the same condition. While the sheet is being sent linearly along the sending passage B, it is pinched by the V-shaped protrusion 1a and the V-shaped groove 2a, so that a folding line C is formed ranging from the head end edge A2 to a terminal edge A3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scoring device for wrapping paper for making a crease on an encapsulating material used for wrapping or overwrapping around a box-shaped content, for example. Specifically, while the encapsulating material to be wrapped around the contents is transferred along the transfer path, the first roller having the V-shaped protrusion and the V-shaped groove fitted with the V-shaped protrusion are provided in a concave shape. It has a fold line extending in the transport direction in the encapsulating material by being sandwiched between the encapsulating material and the second roller.

[0002]

2. Description of the Related Art Conventionally, as a scoring device for wrapping paper of this type, for example, as disclosed in Japanese Utility Model Publication No. 55-84201, a wrapping material is a web continuously fed from a roll. A heater block is provided in the transfer path of the V.sub.2 to partially heat and soften only a predetermined portion, and a V-shaped protrusion is provided on the downstream side of the V-shaped protrusion as a folding-curling unit. By disposing a habit forming roller in which a V-shaped groove that fits with the shape protrusion is provided, and by sandwiching the heat-softened portion of the web between the V-shaped protrusion and the V-shaped groove of both the habit forming rollers, the web is forcibly forced. 2. Description of the Related Art In some cases, a plurality of folds that are folded and continuous in the transport direction are provided, and the contents are fed into and wrapped in a web having these folds.

[0003]

However, in such a conventional scoring device for a wrapping paper, the web is not in contact with a heater block, a guide roller, or the like other than a portion sandwiched by both rollers of the web, Since the base end of the web is wrapped around a roll and the front end of the web is wrapped in the contents, and the whole web is immovably supported in the width direction orthogonal to the transfer direction, the folds move in the width direction. Although it is prevented and does not meander, when the encapsulating material is a sheet cut into a rectangle and the sheets are transported one by one at intervals, each of the transported rollers is rotated between the rollers that rotate in opposite directions. It is difficult to allow the leading edge of the sheet to enter under exactly the same conditions, and there is a problem that the folds meander in the width direction due to slight differences in the entering conditions. The cause is that the leading edge of each sheet is not cut at right angles to the side edge in the transfer direction, and the paper quality and thickness dimensions of each sheet are not uniform. It is difficult to contact both rollers at the same time, and if either one of both ends in the width direction first contacts both rollers, only the contacting end is sandwiched between both rollers and fed out, thereby This is because the transfer direction bends in the width direction from the transfer path, and particularly when the size of the sheet in the transfer direction is shorter than the width dimension, the meandering appears significantly. As a result, even if a sheet with a meandering fold is wrapped around the box-shaped contents in a body-wrapping or over-wrapping, the ridges and folds of the box-shaped contents do not completely match and cannot be tightly wrapped. However, there is a problem that the appearance is poor and the commercial value is reduced.

The invention according to claim 1 of the present invention is intended to make a crease without meandering over the entire length in the sheet transport direction. In addition to the object of the invention as set forth in claim 1, the invention as set forth in claim 2 is for the purpose of partially forming a fold line from the middle of the sheet transfer direction to the end without meandering. In addition to the object of the invention described in claim 1 or 2, the invention described in claim 3 aims to surely prevent meandering to the end of the sheet. Further, the invention of claim 4 is, in lieu of the object of the invention of claim 2, in which the folds are not meandered partially in the sheet transfer direction, which is attached only in the middle of the sheet transfer direction without being meandered partially. It is intended to be attached to. Further, in addition to the object of the invention according to claim 3 or 4, the invention according to claim 5 is intended to prevent wrinkles from being generated in the sheet even when the sheet is transported while the sending-out means slightly slides. It is what

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is a sheet in which an encapsulating material is cut into a rectangular shape, and a V-shaped projection of a first roller. And the V-shaped groove of the second roller is rotated at the same speed toward the downstream side in the transport direction of the encapsulating material, and at least one sheet at a time in the transport direction upstream of the first roller and the second roller in the transport direction. A feeding means for holding the movable body in the orthogonal width direction so as to be immovable and feeding a predetermined distance to the downstream side of the transfer path is provided, and the V-shaped projection and the V-shaped groove are provided between the first roller and the second roller and the feeding means. A feed roller that rotates toward the downstream side in the transport direction at substantially the same speed is provided, and the leading end portion of the sheet fed by the feeding means is reciprocally moved toward or away from the feed roller with a predetermined pressure in the width direction. A press roller is sandwiched so that it cannot move, and the distance from the sheet sandwiching position of these feed roller and press roller to the sheet sandwiching position of the first roller and the second roller is narrower than the transfer direction dimension from the leading edge to the trailing edge of the sheet. It is characterized by being arranged.

According to a second aspect of the present invention, the encapsulating material is a sheet cut into a rectangular shape, and the V-shaped protrusion of the first roller and the V-shaped groove of the second roller are fed at the same speed in the transport direction of the encapsulating material. The sheet is rotated toward the downstream side, and one sheet at a time upstream of the first roller and the second roller in the transfer direction is held immovably at least in the width direction orthogonal to the transfer direction, and is predetermined to the downstream side of the transfer path. A feeding means for feeding a distance is provided, and one of the first roller and the second roller is reciprocated toward or away from the other, and the leading end of the sheet fed by the feeding means is orthogonal to the transport direction at a predetermined pressure. It is characterized in that it is sandwiched in the width direction.

According to a third aspect of the invention, in the structure of the first or second aspect of the invention, the sheet is moved downstream of the first roller and the second roller in the transport direction in the width direction orthogonal to the transport direction. The feeding means for improperly nipping and transferring to the downstream side is provided, and the distance from the sheet nipping position of the first roller and the second roller to the sheet nipping position of the feeding means is the transfer direction dimension from the leading edge to the trailing edge of the sheet. It is characterized by the addition of a narrower arrangement.

According to a fourth aspect of the present invention, in addition to the configuration of the third aspect of the invention, a part of the sheet is sandwiched between the V-shaped protrusion of the first roller and the V-shaped groove of the second roller. After the leading edge is sandwiched by the feeding means, one of the first roller and the second roller is moved in a direction away from the other, which is a feature.

According to a fifth aspect of the present invention, in addition to the structure of the third or fourth aspect of the invention, the sheet transfer speed by the feeding means is the rotational speed of the V-shaped protrusion of the first roller and the V-shaped groove of the second roller. It is characterized by adding a slightly faster configuration.

[0010]

According to the first aspect of the present invention, after the sheet is fed by the feeding means to the downstream side of the transport path for a predetermined distance, the press roller is moved toward the feed roller so that the leading end portion of the fed sheet is moved by a predetermined pressure. By sandwiching the sheet so that it cannot move in the direction, the sheet is transported straight by the rotation of the feed roller toward the first roller and the second roller along the transport path, and the press roller and the feed roller partially cover the sheet. In the sandwiched state, the leading edge A2 of the sheet has the V-shaped protrusion of the first roller and the V-shaped protrusion of the second roller.
It is inserted between the V-shaped projection and the V-shaped groove under exactly the same conditions, and while being transferred straight along the transfer path, it is sandwiched between the V-shaped projection and the V-shaped groove so that a fold line is formed from the leading edge to the terminal edge.

According to the second aspect of the invention, after the sheet is delivered by the delivering means to the downstream side of the transfer path for a predetermined distance, either one of the first roller and the second roller is moved toward the other and the sheet is delivered. By sandwiching the leading end of the sheet with a predetermined pressure in the width direction orthogonal to the transfer direction, the leading end of the sheet enters between the V-shaped protrusion of the first roller and the V-shaped groove of the second roller under exactly the same conditions. Then, while the sheet is being transported straight along the transport path, a crease is made from the middle of the transport direction to the end edge.

The invention of claim 3 is the same as claim 1 or 2.
With respect to the invention described above, on the downstream side of the first roller and the second roller in the transport direction, there is provided a delivery means for sandwiching the sheet immovably in the width direction orthogonal to the transport direction and transporting the sheet to the downstream side. Since the distance between the sheet sandwiching position of the roller and the second roller and the sheet sandwiching position of the feeding means is arranged to be narrower than the transfer dimension from the leading edge to the trailing edge of the sheet, the first roller and the second roller are added. While the sheet is sandwiched by and, at least the leading edge of the sheet is sandwiched by the feeding means, and the sheet passes between the V-shaped projection and the V-shaped groove while being held in two places up to the terminal edge of the sheet.

Furthermore, the invention of claim 4 is different from the invention of claim 3, in that the leading end of the sheet is sandwiched between the V-shaped protrusion of the first roller and the V-shaped groove of the second roller. Since the configuration in which either the first roller or the second roller is moved in the direction away from the other is added after the edge is sandwiched by the feeding means, the V-shaped protrusion of the first roller and the V of the second roller are added. While a part of the sheet is sandwiched between the shaped grooves, after the leading edge is sandwiched by the feeding means, by moving either one of the first roller or the second roller in the direction away from the other, A crease is formed only while one of the roller and the second roller is moving toward the other, and the crease is not formed from the time when the roller or the second roller is moved toward the other, and the sheet is transferred only by the operation of the feeding means.

Further, in the invention of claim 5, in addition to the invention of claim 3 or 4, the sheet transfer speed by the feeding means is the rotational speed of the V-shaped projection of the first roller and the V-shaped groove of the second roller. By adding a slightly faster configuration, by making the sheet transfer speed of the delivery means slightly faster than the rotation speed of the first roller and the second roller,
The sheet is conveyed while being pulled to the downstream side by the feeding means.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIGS. 1 to 5, a large number of sheets of the packaging material A used for body-wrapping, for example, paper sheets of which the dimension in the transfer direction is shorter than the lateral width dimension, are stacked to face the uppermost sheet A. The uppermost sheets A are separated one by one by the arranged feeding means 3 and fed to the downstream side of the horizontal transfer path B by a predetermined distance, and the V-shaped projection 1a is projected downwardly with the transfer path B sandwiched therebetween. One roller one
Is rotatably supported and also rotatably supports a second roller 2 in which a V-shaped groove 2a for fitting with the V-shaped projection 1a is provided above, and the first roller 1 and the second roller 2 are rotatably supported.
The sheet A is fed by the feeding means 6 arranged on the further downstream side.
Is transported to the body winding portion arranged at the downstream end of the transfer path B, and the sheet A is wrapped around the box-shaped contents D at the body winding portion.

The first roller 1 and the second roller 2 are shown in FIG.
, The sheet A is sandwiched so as to be immovable in the left-right width direction by being divided into a plurality of parts in the left-right direction or continuously extended, and is linked to a rotation drive part 7 described later to form a V-shaped projection 1a.
The V-shaped groove 2a and the V-shaped groove 2a rotate at the same speed toward the downstream side of the transfer path B, respectively, and the V-shaped projection 1a and the V-shaped groove 2a are rotated.
Box-shaped contents D that are wrapped in a cylinder as shown in FIGS. 2 and 5.
4 to correspond to the ridge edge D1 located at the four corners of the body
Individually arranged, one of the first roller 1 and the second roller 2 is supported so as to be adjustable and movable in the vertical direction toward or away from the other. In the illustrated example, the bearing portion 2b of the second roller 2 is movably supported by the adjusting screw 2c toward the second roller 2, and the first roller 1 and the second roller 2 are supported.
Is adjusted so that the sheet A passes while making a fold C, and the bearing portion 2b is pressed against the first roller 1 by a pressing member 2d such as a compression coil spring. When the gap of the second roller 2 is smaller than the thickness dimension of the sheet A, the pressing member 2d is compressed to widen the gap.

In the case of this embodiment, the feeding means 3 is, for example, as described in Japanese Utility Model Laid-Open No. 63-126346.
A large number of sheets A stacked on the vertically movable sheet feeding table 3a
As shown in FIG. 4, air is blown from the air blowing port 3b to the upper end edge A3 of ...
As shown in FIG. 3, the floating top end sheet A is adsorbed by a pair of left and right sorting cups 3c and pulled up to separate it from the next sheet A, and the separated top sheet A and next sheet A are separated. By inserting the insertion head 3d between the above and the insertion head 3d, air is blown from the insertion head 3d to float the entire top sheet A, and only the floated top sheet A is adsorbed by the pair of left and right feed cups 3e. At least in the left-right width direction, the sheet A is held immovably and is fed out by a predetermined distance so that the leading end portion A1 of the sheet A enters between a feed roller 4 and a press roller 5 described later.

Between the first roller 1 and the second roller 2 and the feeding means 3, the transfer path B is vertically sandwiched between
As shown in FIG. 3, the feed roller 4 is divided into a plurality of parts in the left-right direction or extends continuously, and the feed roller 4 is divided into a plurality of parts in the left-right direction in parallel with the feed roller 4 or extends continuously and And a rotatable press roller 5 that reciprocates in the up-and-down direction toward and away from each other. In the case of the present embodiment, the feed roller 4 is immovably supported below the transfer path B, and is linked with a rotary drive unit 7 described later to transfer at a speed substantially the same as that of the V-shaped projection 1a and the V-shaped groove 2a. Rotate toward the downstream side of road B. Press roller 5
Is vertically movably supported above the transfer path B, and an elevating and lowering drive section 5a such as an air cylinder is provided in series, and the elevating and lowering drive section 5a is controlled based on the operation of the feeding means 3. In the operating state of the feeding means 3, the press roller 5 is kept away from the feed roller 4 and stands by, and after the operation of the feeding means 3 is completed, the press roller 5 is moved toward the feed roller 4 and fed by the feeding means 3. The front end portion A1 of the sheet A is sandwiched by a predetermined pressure so as to be immovable in the left-right width direction. Further, the distance from the position where the sheet A is sandwiched by the feed roller 4 and the press roller 5 to the position where the sheet A is sandwiched between the first roller 1 and the second roller 2 is at least as shown in FIG. Leading edge A2 to trailing edge A3
It is preferable to arrange the sheet A narrower than the sheet conveying dimension up to, and particularly as narrow as possible when the sheet A used has a very short sheet conveying dimension.

The sending-out means 6 is, for example, Jitsuko Sho 59-7.
As described in Japanese Patent Laid-Open No. 203-203, a pair of left and right feed belts 6a, a pair of left and right sheet bearing surfaces 6b opposed to the left and right feed belts 6a with a transfer path B interposed therebetween, and rotatably mounted on the sheet bearing surfaces 6b. The support roller 6c is attached to the shaft, and the left and right feed belts 6a and the seat support surface 6b are provided.
By sandwiching the sheet A between it and the supporting roller 6c, the sheet A is moved to a position where it abuts against the stopper while holding it immovably at least in the left-right width direction, and the left feed belt 6a and the sheet bearing surface 6b and the right feed are provided. It is supported so as to straddle the body winding portion formed between the belt 6a and the seat supporting surface 6b. Then, as described in the same publication, the box-shaped contents D is moved up and down and, for example, the upper surface thereof is abutted against the sheet A supported by the body winding portion, so that the left and right end portions A5 of the sheet A shown in FIG. , A5 are folded down along the left and right side surfaces D2, D2 of the box-shaped contents D, and then the left and right end portions A5, A5 are folded along the bottom surface D3 of the box-shaped contents D, so that the left and right edges A
Overlap 6, A6 and glue. Further, the distance from the position where the sheet A is sandwiched by the first roller 1 and the second roller 2 to the position where the sheet A is sandwiched by the feed belt 6a of the feeding means 6, the sheet bearing surface 6b and the bearing roller 6c is As shown in FIG. 1, the sheet A should be at least narrower than the transfer dimension from the leading edge A2 to the trailing edge A3 of the sheet A. Especially, if the sheet A to be used has a very short dimension of transfer, it should be placed as narrow as possible. Is preferred.

Further, in the case of the present embodiment, as shown in FIGS. 1 to 3, the first roller 1, the second roller 2, the feed roller 4 and the drive pulley 6d of the feed belt 6a are linked to each other by, for example, sprockets. 1b, 2e, 4a, 6e
Are continuously provided, and the linking parts 1b, 2e, 4a, 6e and the rotary driving part 7 such as a motor are linked by a transmission member 7a such as a chain or a timing belt to continuously operate the rotary driving part 7. Alternatively, the feed roller 4 may be moved to the V of the first roller 1 by intermittently operating for a predetermined time after the operation of the feeding means 3 is completed.
The protrusions 1a and the V-shaped grooves 2a of the second roller 2 are rotated at the same speed as or slightly slower than the rotation speed, and the feed belt 6a is rotated.
Of the V-shaped projection 1a and the V-shaped groove 2a is slightly faster than the rotational speed of the V-shaped projection 1a and the V-shaped groove 2a, for example, about 2 to 4%. Also,
Sheet support surface 6 of the first roller 1 and the feeding means 6
A fixed guide 8 for guiding the sheet A is disposed between the fixed guide 8 and b.

Next, the operation of such a creasing device for wrapping paper will be described. First, in the initial state, as shown by the alternate long and short dash line in FIG. 1, the press roller 5 separates from the feed roller 4 and stands by. From this state, the feeding means 3 starts to operate and separates the sheets A one by one. As shown by the solid line in FIG. 1, the leading end portion A1 is fed to a position where it enters between the feed roller 4 and the press roller 5.

After that, the press roller 5 moves toward the feed roller 4, and the front end portion A1 of the sheet A fed by the feeding means 3 is sandwiched by the predetermined pressure in the left-right width direction so that the feed roller 4 cannot move. By the rotation of 4, the sheet A is transported straight along the transport path B toward the first roller 1 and the second roller 2.

Then, the leading edge A2 of the sheet A conveyed by the rotation of the feed roller 4 enters between the first roller 1 and the second roller 2. At this time, the sheet A is sandwiched between the press roller 5 and the feed roller 4 so as to be immovable in the left-right width direction at a part of the sheet A in the middle of the sheet transfer direction, even when the sheet A has the shortest transfer dimension. Therefore, the leading edge A2 of the sheet A has the V-shaped projection 1a of the first roller 1 ...
Between the V-shaped groove 2a of the second roller 2 and the V-shaped groove 2a of the second roller 2, the sheet A is transferred straight along the transfer path B as shown by the chain double-dashed line in FIG. , And the V-shaped grooves 2a ... Are sandwiched by a predetermined pressure and bent, so that four folds C ... Are made parallel from the leading edge A2 in the transport direction.

After that, even when the end edge A3 of the sheet A has finished passing between the press roller 5 and the feed roller 4,
Even when a part of the sheet A is continuously sandwiched between the first roller 1 and the second roller 2 and the dimension of the sheet A in the transport direction is very short, as shown in FIG. The leading edge A2 of the sheet A that has finished passing between
The feeding belt 6a of the feeding means 6 along the fixed guide 8
The sheet A passes between the V-shaped projections 1a ... And the V-shaped grooves 2a .. And reaches the end edge A3 while being held at two or more places.

Therefore, the folds C ... Are attached to the sheet A from the leading edge A2 to the trailing edge A3 over the entire length in the transport direction without meandering in a straight line in the transport direction, and thereafter, as shown in FIG. When the sheet A having the folds C ... is wrapped around the box-shaped contents D in a body-wrapping manner, the folds C ... of the sheet A are completely aligned with the ridge edges D1 of the box-shaped contents D and do not swell. Can be tightly packed. Further, if the moving speed of the feed belt 6a is made slightly higher than the rotation speed of the V-shaped projection 1a and the V-shaped groove 2a, the sheet A is conveyed while being pulled by the feed belt 6a to the downstream side, so that the feed belt 6a slips. Even if the sheet A is transferred, it is possible to prevent wrinkles from occurring on the sheet A.

On the other hand, FIG. 6 shows another embodiment of the present invention, in which the feed roller 4 and the press roller 5 are not provided and the first roller 1 or the second roller 2 is provided.
1 to 5 in which the front end portion A1 of the sheet A fed out by the feeding means 3 is reciprocated in a direction toward or away from the other and sandwiched by a predetermined pressure in a width direction orthogonal to the transport direction. Unlike the example shown in
The other structure is the same as that of the embodiment shown in FIGS.

In the case of the illustrated example, the second roller 2 is supported so as to be capable of reciprocating in the up-and-down direction toward and away from the first roller 1, and for example, an elevating and lowering drive unit 2 such as an air cylinder.
d is connected in series and the elevating and lowering drive section 2d is operated and controlled based on the operation of the feeding means 3, whereby the second roller 2 is moved to the first roller 1 in the operating state of the feeding means 3.
From the front end portion A of the sheet A fed by the feeding means 3 by moving the second roller 2 toward the first roller 1 after the operation of the feeding means 3 is completed.
1 is sandwiched by a predetermined pressure in the left-right width direction so as to be immovable, and is always rotated regardless of the vertical movement of the second roller 2, or is rotated only when the second roller 2 is moved toward the first roller 1.

Then, by the operation of the feeding means 3, FIG.
As shown by the solid line, after the leading end portion A1 of the sheet A is fed to a position where it enters between the first roller 1 and the second roller 2, the second roller 2 moves closer to the first roller 1, Sheet A fed by the feeding means 3
The front end portion A1 of the sheet A is sandwiched by a predetermined pressure so as to be immovable in the left-right width direction, whereby the front end portion A1 of the sheet A is V-shaped protrusion 1a of the first roller 1 and V-shaped groove 2a of the second roller 2.
And sheet A and transfer path B
While being transported straight along, the V-shaped projections 1a ... And the V-shaped grooves 2a ...
Four fold lines C ... Are made parallel to the sheet A in the middle of the sheet transfer direction. Thereafter, with the part of the sheet A sandwiched between the first roller 1 and the second roller 2, the leading edge A2 along the fixed guide 8 and the feeding belt 6a of the feeding means 6 as shown by the chain double-dashed line in FIG. If the sheet A is sandwiched between the sheet supporting surface 6b and the supporting roller 6c, and the second roller 2 is continuously moved toward the first roller 1 as shown by the solid line in this state, the sheet A is V-shaped while being held at two places. Passes between the protrusions 1a ... And the V-shaped grooves 2a. Therefore, in the case of FIG. 6, it is necessary to partially form the folds C ... from the middle of the sheet A in the transport direction to the end without meandering in a straight line in the transport direction, and to provide the feed roller 4 and the press roller 5. Figure 1
As compared with the examples shown in FIGS. 5 to 5, the feed roller 4 and the press roller 5 are not required, so that the structure can be simplified and the cost can be reduced.

After the leading edge A2 of the sheet A is sandwiched by the feeding means 6, if the second roller 2 is moved in the direction away from the first roller 1 as shown by the alternate long and short dash line, the fold line C ... The sheet A is transferred to the body winding portion only by the operation of the sending-out means 6 by this operation, whereby the sheet A is attached only in the middle of the transfer direction without the creases C ... To be Therefore, after the sheet A having the folds C ... Partially attached at the body winding portion is wrapped around the box-shaped contents D in a body-wrapping manner, the front and rear sides of the sheet A protruding from both side surfaces D4 and D4 of the box-shaped contents opened. Both sides D that open at both ends
In the case of overwrapping which is folded along 4, 4, D4, it is possible to make folds C ... Only on the portions corresponding to the ridge edges D1 ... Located at the four corners of the body of the box-shaped contents D.

In the embodiment shown above, the case in which the encapsulating material A is a sheet of which the direction of transfer is shorter than the left-right width dimension, such as a paper used for body-wrapping, is not limited to this, and the overwrapping is not limited thereto. It may be a sheet of which dimensions used for packaging are not limited. Further, the feeding means 3 and the feeding means 6 are not limited to the above-mentioned configurations, and may have other configurations as long as they have the same function.

[0031]

As described above, according to the invention described in claim 1 of the present invention, after the sheet is fed out by the feeding means for a predetermined distance to the downstream side of the transfer path, the press roller is moved toward the feed roller to approach. By sandwiching the forward end portion of the fed sheet immovably in the width direction with a predetermined pressure, the sheet is transferred straight by the rotation of the feed roller toward the first roller and the second roller along the transfer path, With the part of the sheet sandwiched between the press roller and the feed roller, the leading edge A2 of the sheet is
Enters between the V-shaped projection of the first roller and the V-shaped groove of the second roller under exactly the same conditions, and is straightly transferred along the transfer path while being sandwiched between the V-shaped projection and the V-shaped groove. Since the folds are formed from the leading edge to the trailing edge, the folds can be formed without meandering over the entire length in the sheet transport direction.
Therefore, even if the leading edge of each sheet is not cut at right angles to the side edge in the transfer direction, or the paper quality and thickness dimensions of each sheet are not uniform, the folds do not meander in the width direction and the sheet When the box-shaped contents are wrapped around the box-shaped contents or over-wrapped, the folds of the sheet can be tightly packed with the ridges and edges of the box-shaped contents, and the appearance can be improved to improve the commercial value. .

According to the second aspect of the invention, after the sheet is fed out by the feeding means to the downstream side of the transfer path for a predetermined distance, either the first roller or the second roller is moved toward the other toward the other, and the sheet is fed out. By sandwiching the leading end of the sheet with a predetermined pressure in the width direction orthogonal to the transfer direction, the leading end of the sheet enters between the V-shaped protrusion of the first roller and the V-shaped groove of the second roller under exactly the same conditions. Then, while the sheet is being transported straight along the transport path, folds are formed from the middle of the transport direction to the end edge, so that the fold can be partially made from the middle of the transport direction to the end without meandering. Therefore, as compared with a device which needs to have a feed roller and a press roller, the structure can be simplified and the cost can be reduced because the feed roller and the press roller are not required.

The invention of claim 3 is the same as claim 1 or 2.
In addition to the effect of the invention, while the sheet is sandwiched between the first roller and the second roller, at least the leading edge of the sheet is sandwiched by the feeding means, and the sheet is held at two points up to the terminal edge. Since it passes between the V-shaped projection and the V-shaped groove, it is possible to reliably prevent meandering to the end of the sheet.

Further, in the fourth aspect of the present invention, in place of the effect of the second aspect of the invention, the leading end of the sheet is sandwiched between the V-shaped projections of the first roller and the V-shaped grooves of the second roller. By moving either the first roller or the second roller in the direction away from the other after the edge is sandwiched by the feeding means, either the first roller or the second roller moves toward the other toward the other. The crease is made only while the sheet is moving, and the crease is not made from the time it moves in the away direction, and the sheet is transferred only by the operation of the feeding means. To be

Further, in addition to the effect of the invention of claim 3 or 4, the invention of claim 5 further improves the effect of the invention of claim 3 or 4 by making the sheet transfer speed of the sending-out means slightly higher than the rotation speed of the first roller and the second roller. Since the sheet is transferred while being pulled to the downstream side by the sending-out means, wrinkles can be prevented from occurring on the sheet even if the sheet is transferred while the sending-out means slides.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional front view of a creasing device for a wrapping paper showing an embodiment of the present invention, and shows a state in which a leading end portion of a sheet is sandwiched between a feed roller and a press roller by a solid line.

FIG. 2 is a partial vertical cross-sectional side view taken along line (2)-(2) of FIG.

FIG. 3 is a partial vertical cross-sectional side view taken along line (3)-(3) of FIG.

FIG. 4 is a vertical cross-sectional front view showing a state where the leading edge of the sheet is sandwiched by the sending-out means.

FIG. 5 is a perspective view showing a state in which a packaging material is wrapped around the contents.

FIG. 6 is a vertical cross-sectional front view of a creasing device for wrapping paper showing another embodiment of the present invention.

[Explanation of symbols]

A Encapsulating material, sheet A1 Tip part A2 Tip edge A3 End edge B Transfer path C Fold D Contents (box-shaped contents) 1 First roller 1a V-shaped protrusion 2 Second roller 2a V-shaped groove 3 Feeding means 4 Feed Roller 5 Press roller 6 Feeding means

Claims (5)

[Claims] 1. A first roller provided with a V-shaped projection (1a) while transferring an encapsulating material (A) to be wrapped around a content (D) along a transfer path (B). (1) and this V
A fold (C) extending in the transfer direction is formed in the encapsulating material (A) by sandwiching it between the shaped protrusion (1a) and the second roller (2) having a V-shaped groove (2a) fitted therein. In the attached scoring device for wrapping paper, the encapsulating material (A) is a sheet cut into a rectangle, and the V-shaped protrusion (1a) of the first roller (1) and the V-shaped protrusion of the second roller (2). The groove (2a) is rotated toward the downstream side in the transfer direction of the encapsulating material (A) at the same speed, and the sheet (A) is placed upstream of the first roller (1) and the second roller (2) in the transfer direction. The first roller (1) and the second roller (1) are provided with a feeding means (3) that holds each of the sheets immovably at least in the width direction orthogonal to the transfer direction and extends a predetermined distance to the downstream side of the transfer path (B). Between the (2) and the feeding means (3), the above V-shaped protrusion (1a) and V-shaped A feed roller (4) that rotates toward the downstream side in the transport direction at substantially the same speed as (2a) is provided, and the feed roller (4) is reciprocated in a direction toward or away from the feed roller (4) and fed by a feeding means (3). A press roller (5) for nipping the front end portion (A1) of the sheet (A) with a predetermined pressure so as to be immovable in the width direction is provided, and the feed roller (4) and the press roller (5) move from the sheet nipping position to the first roller (5). A wrapping paper characterized in that the distance between the sheet nipping position of 1) and the second roller (2) is narrower than the transfer dimension from the leading edge (A2) to the trailing edge (A3) of the sheet (A). Creasing device. 2. A first roller (1) provided with a V-shaped protrusion (1a) while transferring an encapsulating material (A) wrapped around the contents along a transfer path (B). And a second roller (2) in which a V-shaped groove (2a) fitted to the V-shaped projection (1a) is provided, so that a fold line extending in the transfer direction is applied to the encapsulating material (A). In the scoring device for wrapping paper with (C), the encapsulating material (A) is a sheet cut into a rectangle, and the V-shaped protrusion (1a) of the first roller (1) and the second roller (2). 1) and the second roller (2) by rotating the V-shaped groove (2a) of 1) toward the downstream side in the transport direction of the encapsulating material (A) at the same speed.
On the upstream side in the transfer direction, there is provided a feeding means (3) for holding the sheets (A) one by one at least in the width direction orthogonal to the transfer direction and feeding them to the downstream side of the transfer path (B) by a predetermined distance. Either the first roller (1) or the second roller (2) is reciprocated toward or away from the other, and the leading end portion (A1) of the sheet (A) fed by the feeding means (3) is moved. A creasing device for wrapping paper, which is sandwiched at a predetermined pressure in a width direction orthogonal to the transfer direction. 3. A feed for transporting the sheet (A) downstream from the first roller (1) and the second roller (2) in the transport direction by sandwiching the sheet (A) immovably in the width direction orthogonal to the transport direction. Means (6) are provided, and the distance from the sheet sandwiching position of the first roller (1) and the second roller (2) to the sheet sandwiching position of the feeding means (6) is the leading edge (A2) of the sheet (A). To end edge (A3)
The creasing device for wrapping paper according to claim 1 or 2, wherein the creasing device is arranged to be narrower than the transfer method. 4. The V-shaped protrusion (1) of the first roller (1).
a) and the V-shaped groove (2a) of the second roller (2), the leading edge (A2) is sandwiched by the delivery means (6) while sandwiching a part of the sheet (A), and The scoring device for wrapping paper according to claim 3, wherein one of the one roller (1) and the second roller (2) is moved in a direction away from the other. 5. The sheet transfer speed by the sending-out means (6) is made slightly higher than the rotational speed of the V-shaped protrusion (1a) of the first roller (1) and the V-shaped groove (2a) of the second roller (2). The creasing device for wrapping paper according to claim 3 or 4.