JP2974093B2 - Single side corrugated board making machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-sided corrugated board manufacturing machine applied to the production of a single-sided corrugated board sheet.

[0002]

2. Description of the Related Art A conventional belt pressing type single-sided corrugated cardboard manufacturing machine will be described with reference to FIGS. 5 to 8. FIG. 5 shows an example of a belt pressing type single-sided corrugated cardboard manufacturing machine, and FIG. FIG. 7 shows a belt pressing unit of the belt pressing type single-sided corrugated board making machine, and FIG. 8 shows an operation of the belt pressing type single-sided corrugated board making machine.

In FIGS. 5 and 6, reference numeral 1 denotes an upper roll, 2
Is a lower roll meshed with the upper roll 1, and the upper and lower rolls 1 and 2 form (corrugate) the core paper 3 into a corrugated shape. 4 is glue roll, 4 '
Is an adhesive, 8 and 8 are rolls of a belt pressing unit, and 15 is an endless belt circulating between the rolls 8. In FIG. 5, the endless belt 15 is provided at a position adjacent to the lower roll 2. I have. In the case of FIG. 6, the endless belt 15 is provided at a position adjacent to the upper roll 1.

In the belt-pressing type single-sided corrugated cardboard manufacturing machine shown in FIGS. 5 and 6, the core paper 3 is formed into a corrugated shape by passing between an upper roll 1 and a lower roll 2 meshed with each other. Repetition), and then by the sizing roll 4
The glue 4 ′ is transferred and supplied to the corrugated top of the core paper 3, then merges with the liner 5 supplied via another path, and then between the endless belt 15 and the lower roll 2 (or between the endless belt 15 and the upper roll 1). Between the core paper 3 and the liner 5 by applying a predetermined heat and a pressing force (a pressing force obtained by the tension of the endless belt 15).
Are bonded together via the glue 4 ′ to produce the cardboard sheet 7.

[0005] When the core paper 3 and the liner 5 are bonded together via the glue 4 ′, the initial contact pressure adjusting means between the upper and lower step rolls 1 and 2 and the inside of the upper and lower step rolls 1 and 2 are attached. Introduce steam or hot oil to these rolls 1,
2 is equipped with a heating device for heating. As shown in FIGS. 5A and 5B, the endless belt 15 has a tension adjusting device and a winding angle around the lower roll 2 (or the upper roll 1) between one roll 8 and the gantry 10. An adjusting device, a skew prevention device, and other equipment necessary for a belt-pressing type single-sided corrugated cardboard manufacturing machine are installed (for these points, refer to Japanese Patent Application No. 2-405921 if necessary).

[0006]

The conventional belt pressing type single-sided corrugated board manufacturing machine shown in FIGS. 5 to 8 has the following problems. (1) Since the endless belt 15 is a single belt slightly wider than the maximum width of the single-sided corrugated cardboard sheet 7 to be manufactured, the circumferential length of the belt is made uniform over the entire width direction. If the circumferential length of the belt becomes uneven in the width direction, the holding force between the belt and the corrugated roll becomes uneven, and there is a possibility that the single-sided corrugated cardboard sheet 7 may be partially stuck. . (2) When correcting the meandering of the running core paper 3, a large tension is required in proportion to the dimension in the width direction of the belt, and the wide belt is wrinkled or broken, and the belt is broken at an early stage. There was fear. (3) The single-sided corrugated cardboard sheet 7 to be manufactured has various widths. Even if the belt is partially worn due to the frequency of use, it is necessary to replace the entire wide belt, which increases the running cost. There was a problem.

The present invention has been made in view of the above-described problems, and has as its object to facilitate manufacture of a belt and to improve the accuracy of the circumference of the belt over the entire width direction. Further, the durability of the belt can be improved. Also, running costs can be reduced. Another object of the present invention is to provide a single-sided corrugated cardboard manufacturing machine capable of making the pressing force of the core paper and the liner against the corrugated rolls uniform in the entire width direction.

[0008]

In order to achieve the above object, the present invention relates to a step roll provided on a downstream side in a running direction of a core paper running on an endless belt circulating between a plurality of rolls. A core paper which is provided in an adjacent position, is formed into a corrugated shape by sandwiching rotation of upper and lower step rolls, and transfers the glue to the top of the corrugated step by a gluing roll, and a liner which merges with the concentric paper via another path. In a single-sided corrugated cardboard manufacturing machine in which the core paper and the liner are bonded via glue adhered to the corrugated corrugated top by pressing and nipping and transporting by the endless belt and the corrugated roll, the endless belt is It is divided into a plurality of parts in the width direction, and it comes into contact with
Tension adjustment means to adjust the tension of each belt
Therefore, they must be moved individually in the direction perpendicular to each axis.
The movable rolls to be moved and the horizontal inclination of each movable roll
Meandering correction means for individually adjusting
It is characterized by the following.

[0009]

The single-faced corrugated cardboard manufacturing machine of the present invention is constructed as described above. The core paper is formed into a corrugated shape by the upper and lower corrugated rolls (stepping), and the corrugated corrugated top of the corrugated paper is formed by the glue roll. The glue is transferred and supplied, and the core paper and the liner supplied via another path are pressed by the split endless belt of the pressing unit, and the core paper and the liner are attached to the corrugated step top of the core paper. By laminating, a single-sided corrugated cardboard sheet is manufactured.
At this time, the running state of each of the divided endless belts (adjustment of tension, correction of meandering) is adjusted for each belt, so that the pressing force of the core paper and the liner on the step rolls in the entire width direction is made uniform.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The single-sided corrugated cardboard manufacturing machine of the present invention will be described with reference to one embodiment shown in FIGS. 1 to 4. FIG. 1 shows an upper roll 1 and a lower roll 2 meshed with the upper roll 1. The core paper 3 is formed into a corrugated shape (stepped) by the upper and lower step rolls 1 and 2.

In FIG. 1 to FIG. 4, 4 is a gluing roll, 4 'is a glue, 8a and 8b are rolls of a belt pressing unit, and the rolls 8a and 8b are rotatably supported by the apparatus frames 14a and 14b. Alternatively, the rolls 8a and 8b can be moved in parallel in the diameter direction to change the winding angle of the belt 6, which contacts the upper roll 1, as will be described later (see the dashed line in FIG. 1). 6a, 6b, 6c are the rolls 8a, 8
The endless belts 6a, 6b, and 6c are arranged at positions adjacent to the upper roll 1 (the step roll disposed on the downstream side in the traveling direction of the core paper 3). I have. The split endless belt 6
a, 6b, and 6c are a rotary driving device (not shown) provided outside the frame 14a (or 14b) and a roller 8a.
(Or 8b) and circulates in synchronization with the peripheral speeds of the upper and lower step rolls 1 and 2.

10 is a gantry, 12 is three brackets attached to the gantry 10 via respective tension adjusting cylinders 11,
13a and 13b are a pair of meandering correction cylinders attached to the respective brackets 12, 9 is three movable rolls rotatably attached to the heads of the cylinders 13a and 13b, and the movable roll 9 is the split endless belt 6a, 6b, 6
c is in contact with the upper lower surface of the
The traveling states of a, 6b, and 6c are adjusted in belt units.

That is, as shown in FIG. 4, the tension adjusting cylinder 11 for each belt attached to the gantry 10 is operated in the expansion and contraction direction, and the bracket 12 and the cylinder 13a, 1
The tension of the divided endless belts 6a, 6b, 6c is individually adjusted by vertically moving the movable roll 3b and the movable roll 9 vertically. In addition, the pair of meandering correction cylinders 13a and 13b attached to the bracket 12 for each belt are operated in the expansion and contraction direction to tilt the movable roll 9 in the horizontal direction (θ in FIG. 4).
By changing the endless belt 6
The meanders a, 6b and 6c are corrected.

The tension adjusting means and the meandering correcting means are not limited to the illustrated cylinder 11 and the cylinders 13a and 13b. The tension adjusting means and the meandering correcting means may be provided at different positions as long as the same action can be performed. Next, the operation of the single-sided corrugated cardboard manufacturing machine shown in FIGS. By the upper and lower step rolls 1 and 2,
Is formed into a corrugated shape (stepping), the glue 4 ′ transfers the glue 4 ′ to the corrugated step top of the core paper 3, and presses the core paper 3 and the liner 5 supplied via another path with the pressing unit. And pressurized by the endless belts 6a, 6b, 6c.
And the liner 5 are pasted together via the glue 4 ′ attached to the corrugated top of the corrugated paper 3 to produce the single-sided cardboard sheet 7.

At this time, the tension adjusting cylinder 1 for each belt
1 is operated in the expansion and contraction direction, and the bracket 12, the cylinders 13 a and 13 b, and the movable roll 9 are raised and lowered in the vertical direction for each belt, so that the divided endless belts 6 a and 6
b and 6c are individually adjusted, and a pair of meandering correction cylinders 1 attached to the bracket 12 for each belt
By moving the movable roll 9 in the horizontal direction (see θ in FIG. 4) by operating the movable rolls 3a and 13b in the expansion and contraction direction,
By correcting the meandering of the divided endless belts 6a, 6b, 6c, the pressing force of the core paper 3 and the upper roll 1 of the liner 5 over the entire area in the width direction is made uniform.

[0016]

As described above, the single-sided corrugated cardboard manufacturing machine of the present invention divides the endless belt into a plurality of pieces in the width direction as described above. Compared to the case where an object belt is used, the belt can be manufactured more easily, and the circumferential length accuracy of the belt can be improved over the entire area in the width direction.

Further, as described above, the endless belt is divided into a plurality of pieces in the width direction, so that the belt does not wrinkle, break or the like as in the case of the single wide belt, thereby improving the durability of the belt. it can. In addition, there are various types of single-sided corrugated cardboard sheets of various widths.If a single wide belt is used for the belt, it is necessary to replace the entire wide belt even if the belt is partially worn due to the frequency of use. There was a problem of increasing the running cost, but the single-sided corrugated cardboard manufacturing machine of the present invention divides the endless belt into a plurality in the width direction as described above, and only needs to replace only the belt with severe wear. Thus, running costs can be reduced.

Further, the endless belt is divided into a plurality of pieces in the width direction, and adjustment of the running state (adjustment of tension and correction of meandering) of each of the divided endless belts is performed for each belt. The pressing force on the roll in the entire width direction can be made uniform.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a single-sided corrugated cardboard manufacturing machine of the present invention in FIG.
It is a side view shown along the arrow BB line.

FIG. 2 is a front view taken along the line AA of FIG. 1;

FIG. 3 is a plan view of the single-sided cardboard manufacturing machine.

FIG. 4 is an enlarged front view showing details of an R portion in FIG. 2;

FIG. 5 is a side view showing an example of a conventional single-faced cardboard manufacturing machine.

FIG. 6 is a side view showing another example of a conventional single-faced cardboard manufacturing machine.

FIG. 7 is an operation explanatory view of the single-sided cardboard manufacturing machine.

FIG. 8 is an operation explanatory view of the single-sided cardboard manufacturing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper roll 2 Lower roll 3 Core paper 4 Glue roll 4 'Glue 6a, 6b, 6c Split endless belt 7 Single-sided corrugated cardboard sheet 8a, 8b Roll of belt pressurizing part 9 Movable roll 10 Mounting stand 11 Tension adjusting cylinder 12 Bracket 13a , 13b meandering correction cylinder 14a, 14b device frame

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B31F 1/00-7/02 B65H 20/00-20/40

Claims (1)

(57) [Claims] An endless belt circulating between a plurality of rolls is provided at a position adjacent to a step roll disposed on a downstream side in a running direction of a core paper, and is formed into a corrugated shape by pinching rotation of upper and lower step rolls. And transferring the core paper having the glue transferred to the top of the corrugated step by the gluing roll and the liner merging with the concentric paper via another path by pressing and holding the endless belt and the step roll. Thereby, in a single-sided corrugated cardboard manufacturing machine for bonding these core paper and liner via the glue attached to the corrugated corrugated top, the endless belt is divided into a plurality in the width direction, and each of the divided endless belts is Touching that
Tension adjustment means for adjusting the tension in belt units
Move independently in the direction perpendicular to each axis
Movable rolls and the horizontal tilt of each movable roll
A single-sided corrugated cardboard manufacturing machine comprising: meandering correction means for individually adjusting .