JPH10211664A - Corrugated board sheet processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the generation of fishtailing by processing roughly a bonded face of a corrugated board sheet by a bonded face processing section of a crushing roll when a bonding section of the corrugated board sheet is carried while being crushed. SOLUTION: When a box manufacturing base paper is introduced into crushing rolls 6a, 6b, 7a and 7b, the box manufacturing base paper is gripped by the crushing rolls 6a, 6b, 7a and 7b and crushed thereon to reduce the thickness of a paste hanging piece 4a and a bonding end section 4b and also form roughly the surface of the pasting hanging piece 4a and the bonding end section 4b. The water content contained in a paste transferred and fed on respective bonding faces of the paste hanging piece 4a and the bonding end section 4b through a pasting roll can be permeated easily by the arrangement to improve fast drying properties to a large extent and provide the given bonding force in a short period of time. Thus, when a corrugated board is carried from the inside of an accumulated hopper, a sufficient bonding force is provided on sticking sections and fishtails are hard to be generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardboard box making machine for forming a cardboard box from a cardboard sheet. The present invention relates to a corrugated cardboard sheet processing apparatus that conveys a sheet while conveying.

[0002]

2. Description of the Related Art Conventionally, a corrugated cardboard box has been used to form a folded cardboard box.
Here, when explaining a general cardboard box machine,
FIG. 4 is a diagram schematically showing the entire configuration of a conventional cardboard box making machine. As shown in FIG. 4, the cardboard box making machine 30
A paper supply unit 11 for sequentially feeding the corrugated cardboard sheets 1 stacked on the paper supply table to a downstream side, a printing unit 12 for performing predetermined printing on the corrugated cardboard sheets 1, a process for forming a ruled line on the corrugated cardboard sheets 1 and a slotter groove. And a folding section 5 that forms a folded cardboard box 3 by gluing the paperboard box paper 4 to form a folded box. And a counter ejector 14 for sequentially discharging the stacked cardboard boxes 3 from the lowermost layer.

[0003] The paper feed unit 11, printing unit 12,
The paper discharge unit 13 and the folding unit 5 constitute a corrugated cardboard sheet processing apparatus. The corrugated cardboard sheet which has been subjected to processing such as forming a ruled line and a slotter groove is referred to as base paper 4 for distinction. Here, the sheet feeding unit 11 is provided with a sheet sending device 15 such as a kicker, and the stacked cardboard sheets 1 are downstream by the sheet sending device 15 one by one from the lowermost cardboard sheet 1. To be sent out.

The paper discharge section 15 is provided with creaser rolls 16a and 16b and slitter rolls 17a and 17b constituting a slitter scorer so as to face up and down a conveying path (sheet path line) of the cardboard sheet 1. ,
The creaser rolls 16a, 16b and the slotter rolls 17a, 17b form a ruled line K in the corrugated cardboard sheet 1, form a slotter groove S, and form the base paper 4 as shown in FIG. ing.

[0005] In Fig. 5, reference numeral 4a denotes a glue-pending piece (adhesive portion) to which the glue 2 is applied when the folded cardboard box 3 is formed. This is the bonded end (bonded portion) to be formed. In FIG. 5, arrows indicate the direction in which the base paper 4 is conveyed. In this case, the glue-pending pieces 4a of the base paper 4 are transported so as to be on the left side in the transport direction, but they may be transported so as to be on the right side in the transport direction.

As shown in FIG. 4, a suction belt 19 and a forming belt 20 are disposed in the folding section 5 above the conveying path of the corrugated cardboard sheet 1 and below, respectively. The stencil base paper 4 is conveyed while being sandwiched between the suction belt 19 and the forming belt 20. When the paper 2 is conveyed in this manner, the glue 2 is transferred and supplied to the glued vertical piece 4a of the base paper 4 by a glue roll (not shown).

After the glue 2 is supplied, the raw paper 4 is held on the transport path while being sucked by the suction unit 31, as shown in FIG.
First, as shown in FIG.
The side provided with a is bent as shown by the arrow in the figure, and then the side provided with the adhesive end 4b of the base paper 4 is bent, and the side provided with the glue 2 is applied to the glued vertical piece 4a. Then, the glued hanging pieces 4a of the raw paper box 4 are bonded to the bonding ends 4b to form the folded cardboard box 3 as shown in FIG. 6 (b).

[0008] The folded cardboard box 3 is
Figure 6 (b), the portion indicated by P ₁ and P ₂ are in a state of superposition two cardboard sheets, the portion indicated by P ₃ are in a state superimposed three cardboard sheets. Incidentally, that glue adhesive portion for the portion indicated by P ₃ is a combined moiety attaching the bonding end portion 4b and the glue vertical strips 4a of manufacturing凾原paper 4.

[0009] Upon this the glue applying section P _3, the thickness becomes thicker than the other portions (portions indicated by P ₁ and P _2), since the variation in the thickness occurs, the transport of the cardboard box 3, this The conveyance state of the cardboard box 3 may become unstable due to the thickness variation. That is, when the cardboard box 3 is transported, the cardboard box 3 may be skewed or shifted left and right with respect to the transport direction due to the thickness variation.

For this reason, as shown in FIG.
The crushing rolls 106a, 106b, 1
07a and 107b are provided. The crushing roll 1 disposed on the left side of the transport path of the raw paper 4
06a and 106b, the glued vertical piece 4a of the base paper 4 is
The crushing rolls 107a and 107b disposed on the right side of the transport path of the stencil base paper 4 crush and squeeze the adhesive end portions 4b of the stencil base paper 4 while holding the adhesive ends 4b. by reducing the thickness of the glue bond portion P ₃ bonding the bonding end portion 4b and the piece 4a, to minimize the variation in the thickness of the other portion (portion shown by P ₁ and P ₂₎ I have to.

The folded cardboard box 3 thus formed is fed into the counter ejector 14 on the downstream side thereof via feed rolls 21a and 21b. In this case, the cardboard box 3 in the folded state is
The bonded portion is on the lower side (see FIG. 6 (b)), and the bent portion extends along the input direction.

As shown in FIG. 7, the counter ejector 14 includes a stacking hopper 10 including a front contact 24 and a rear guide 25 for stacking and storing the cardboard boxes 3 to be put thereinto, and a bottom portion of the stacking hopper 10. And a transfer conveyor 18 to be formed. Here, the forefront 2 of the stacking hopper 10
Numeral 4 regulates the movement of the cardboard box 3 to be loaded forward in the loading direction.

On the other hand, a scoring bar 22 is provided above the rear guide 25 constituting the stacking hopper 10, and the cardboard box 3 is provided by the scoring bar 22.
The movement of the cardboard box 3 to be inserted is regulated rearward, and the position of the cardboard box 3 to be inserted is corrected. Then, the cardboard box 3 put into the counter ejector 14 is lowered while its position is corrected by the forehead 24 of the stacking hopper 10 and the squaring bar 22, and is stacked on the transfer conveyor 18.

At this time, an air pressurizing blower 23 provided above the stacking hopper 10 is provided in the cardboard box 3 to be stacked.
To apply downward pressing force,
The stacked state of the cardboard boxes 3 is stabilized.
The movement of the cardboard boxes 3 stacked in the stacking hopper 10 is also restricted by the rear guide 25.

The transfer conveyor 18 includes a cylindrical roller 27 rotatably mounted on a fixed shaft 26 and a plurality of transfer conveyor belts 1 wound around the roller 27.
8a, and a plurality of transfer conveyor belts 18a are driven by drive rollers (not shown) to transfer the cardboard box 3. For this reason, the transfer conveyor 18 has a plurality of transfer conveyor belts 18a.
Are arranged such that a gap is formed between the upper surface of the cardboard box 3 and the lower end of the forehead 24 constituting the stacking hopper 10 so that the cardboard box 3 can be carried out.

The lowermost cardboard box 3 of the cardboard boxes 3 stacked in the stacking hopper 10 from this gap.
Are pulled out one by one and transported.
The lowermost layer of the corrugated cardboard box 3 is subjected to the total weight of the stacked corrugated cardboard boxes 3 and the pressing force of the air pressurizing blower 23 so that the corrugated cardboard boxes 3 are pressed onto a plurality of transfer conveyor belts 18a. I have.

The cardboard boxes 3 transported out of the stacking hopper 10 by the transfer conveyor 18 are stacked again on a stacking section (not shown) downstream of the transfer conveyor 18, and a predetermined number of bundles are stacked. It is to be transported outside.

[0018]

Since the total weight of the stacked cardboard boxes 3 and the pressing force of the air pressurizing blower 23 act on the lowermost cardboard box 3, the lowermost cardboard box 3 is not provided. When the stack 3 is transferred from the stacking hopper 10, the space between the upper surface of the lowermost cardboard box 3 and the lower surface of the cardboard box 3 that is stacked right above and is not transferred by the forehead 24 is regulated. A frictional force corresponding to the pressing force acting on the lower cardboard box 3 (the frictional force is a force acting in the direction opposite to the transfer direction) acts.

Therefore, in order to transfer the lowermost cardboard box 3 from the stacking hopper 10 and transfer it, a transfer force larger than the frictional force acting on the upper surface of the lowermost cardboard box 3 is applied. It is necessary to act on the lower surface of the box 3. As described above, when the lowermost cardboard box 3 is pulled out of the stacking hopper 10 and transferred, the lower surface and the upper surface of the cardboard box 3 are subjected to a transfer force in the transfer direction and a frictional force opposite to the transfer direction. A large force acts in the opposite direction to each other, and such force acts as a force for shifting the upper part and the lower part of the cardboard box 3. When such a shifting force acts, the bent end has little effect due to its high rigidity, but the effect increases as the end is farther from the bent end (closer to the bonded portion).

For this reason, as shown in FIGS. 8 (a) and 8 (b), the cardboard box 3 in a state of being folded in two layers has a bonding portion in which the lower portion has a central portion with respect to the upper portion. The state is shifted to the center in the downstream direction in the transport direction (this state is called fishtail R). FIG. 8 (a)
In the middle, the arrow indicates the transfer direction. If such fish tail R is generated and the glue is dried and completely adhered in this state, when the cardboard box 3 is to be assembled three-dimensionally as a product, if the corner of the cardboard box is a right angle, Otherwise, the parallelism of each side of the cardboard box will be inaccurate, and the aesthetic and functional quality will be significantly reduced.

On the other hand, the fish tail R is remarkably generated particularly in a state where the paste 2 of the bonding portion 3c is not sufficiently dried, that is, in a state before the bonding force of the paste 2 is sufficiently generated. It is known. In particular, when a vinyl acetate paste that dries slowly is used, or when a water-repellent sheet having low moisture permeability as a liner material of the cardboard sheet 1 or a sheet that has been subjected to paraffin processing or coating processing is used, Fishtail R tends to occur.

In this case, it is conceivable to take a sufficient time for the paste to dry, thereby suppressing the generation of fish tail R. However, since the production speed of the cardboard box machine becomes slow, it is necessary to avoid a decrease in productivity. Can not. For this reason, conventionally, there has been a method of improving the permeability of the water contained in the glue, making the glue solidify in a short time, and roughening the adhesive surface (glue surface) in order to improve the adhesive force. There are various ideas.

For example, as shown in FIG. 9, a roll 50 provided with a wire brush 51 is provided on a conveying path of a glued vertical piece 4a of a stencil sheet 4 for conveying the folding section 5, and a wire brush 51 is provided. There is a method in which the roll 50 provided with is rotated at a high speed to scratch the adhesive surface (glue surface) of the glued vertical piece 4a to make a scratch, thereby roughening the adhesive surface. In addition,
In FIG. 9, reference numeral 52 denotes a roll for holding the glued vertical piece 4a of the base paper 4 from below the roll 50.

According to such a method, although the effect of scratching the adhesive surface (glued surface) of the glued vertical piece 4a is high, a large amount of paper dust is generated during processing, so that it is disposed in the vicinity. In this case, the print quality of the printing unit 12 is reduced. In addition, in order to scratch the adhesive surface of the glued hanging piece 4a by this method, the outer peripheral speed of the wire brush 51 and the conveying speed of the base paper 4, that is, the bonding surface of the glued hanging piece 4a are required. (Here, the speed of the wire brush 51 is made faster than the other rolls to make the speed difference), so that the speed of the base paper 4 to be conveyed is increased. An extra force is applied, and the transport state of the base paper 4 becomes unstable. For example, the transport direction is skewed or shifted left and right with respect to the transport direction.

Further, for example, as shown in FIG. 10, a roll 60 having needle-like projections 61 is provided on the conveying path of the glued vertical piece 4a of the base paper 4 for conveying the folding section 5. Roll 60 having needle-like projections 61
There is a method in which a hole is made in the adhesive surface of the glued dripping piece 4a by pressing the adhesive surface of the glued dripping piece 4a to roughen the adhesive surface (glued surface). In FIG. 10, reference numeral 62 denotes a roll for holding the glued vertical piece 4a of the base paper 4 from below the roll 60.

In such a method, if the number of the needle-like projections 61 is small, the number of holes is reduced and the number of scratches is reduced.
A sufficient effect in improving the adhesive strength cannot be obtained. Therefore, in order to roughen the adhesive surface (glued surface), it is necessary to attach many needle-like projections 61 and make many holes, but this makes the roll 60 expensive. Not preferred.

The present invention has been made in view of the above problems, and has been made to obtain a sufficient adhesive force in a short time without affecting the conveying state of a cardboard sheet.
An object of the present invention is to provide a corrugated sheet processing apparatus.

[0028]

According to the first aspect of the present invention, there is provided a corrugated cardboard sheet processing apparatus according to the first aspect of the present invention, wherein the corrugated cardboard sheet is adhered and pressed while rotating at the same speed as the conveying speed of the corrugated paper sheet. A pair of upper and lower crushing rolls for conveying while crushing is provided, and the crushing rolls are provided with an adhesion surface processing portion for roughing the adhesion surface of the adhesion portion.

With such a configuration, when the adhesive portion of the corrugated cardboard sheet is conveyed while being crushed, the adhesive surface of the adhesive portion of the cardboard sheet is roughened by the adhesive surface processing portion of the crushing roll. According to a second aspect of the present invention, in the configuration of the first aspect, an adhesive portion is provided at left and right ends of the corrugated cardboard sheet, and the pair of upper and lower crushing rolls is formed of the adhesive portion. The present invention is characterized in that each of the bonding surface processed portions is provided corresponding to the bonding surface.

With such a configuration, when the adhesive portions provided at the left and right ends of the corrugated cardboard sheet are conveyed while being crushed, the adhesive surface processed portion of the crushing roll allows
The bonding surfaces of the bonding portions provided at the left and right end portions of the corrugated cardboard sheet are roughened. According to a third aspect of the present invention, there is provided a corrugated cardboard sheet processing apparatus according to the first or second aspect, wherein the adhesive surface processing portion comprises a sandpaper-shaped adhesive surface processing belt formed with a rough surface. Is characterized by being attached to the outer peripheral surface of a.

According to such a configuration, the processed portion of the bonding surface of the crushing roll can be easily formed, and the processing of the bonded surface can be performed reliably. According to a fourth aspect of the present invention, in the configuration of the first or second aspect, the bonded surface processed portion is formed by directly spraying sand-like particles on the outer peripheral surface of the crushing roll. It is characterized by being done.

According to such a configuration, the processed portion of the bonding surface of the crushing roll can be easily formed, and the processing of the bonded surface can be surely performed.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a crushing roll according to an embodiment of the present invention. Since the crushing roll provided in the cardboard sheet processing apparatus of the present embodiment is provided in a cardboard box making machine, the cardboard box making machine will be described first.

This cardboard box machine includes a sheet feeding section 11 for sequentially sending the cardboard sheets 1 stacked on a sheet feeding table to a downstream side, as described in the prior art (see FIGS. 4 and 5). A printing unit 12 for performing predetermined printing on the corrugated cardboard sheet 1, a paper discharging unit 13 for forming a corrugated cardboard sheet 4 as a corrugated cardboard sheet by processing the corrugated cardboard sheet 1 with a ruled line, a slotter groove or the like; 4 and a folding section 5 for forming a folded cardboard box 3 by applying a bending process or the like, and the cardboard boxes 3 are loaded and stacked, and the stacked cardboard boxes 3 are sequentially discharged from the bottom layer. And a counter ejector 14.

The paper feed unit 11, printing unit 12,
The paper discharge unit 13 and the folding unit 5 constitute a corrugated cardboard sheet processing apparatus. The corrugated cardboard sheet which has been subjected to processing such as forming a ruled line and a slotter groove is referred to as base paper 4 for distinction. Here, the sheet feeding unit 11 is provided with a sheet sending device 15 such as a kicker, and the stacked cardboard sheets 1 are downstream by the sheet sending device 15 one by one from the lowermost cardboard sheet 1. To be sent out.

The paper discharge section 15 is provided with creaser rolls 16a and 16b and slitter rolls 17a and 17b constituting a slitter scorer so as to face up and down the transport path (sheet path line) of the cardboard sheet 1. ,
The creaser rolls 16a, 16b and the slotter rolls 17a, 17b form a ruled line K in the corrugated cardboard sheet 1, form a slotter groove S, and form the base paper 4 as shown in FIG. ing.

In FIG. 5, reference numeral 4a denotes a glued piece (glue) to which the glue 2 is applied when the folded cardboard box 3 is formed, and 4b denotes a glued drop 4a. This is the bonded end (bonded portion) to be formed. In FIG. 5, arrows indicate the direction in which the base paper 4 is conveyed. In this case, the conveyed paper 4 is conveyed so that the glued vertical piece 4a of the base paper 4 is on the left side in the conveying direction, but may be conveyed on the right side in the conveying direction.

As shown in FIG. 4, the folding section 5 is provided with a suction belt 19 above the conveying path of the corrugated cardboard sheet 1 and a forming belt 20 below the conveying path. The stencil base paper 4 is conveyed while being sandwiched between the suction belt 19 and the forming belt 20. When the paper 2 is conveyed in this manner, the glue 2 is transferred and supplied to the glued vertical piece 4a of the base paper 4 by a glue roll (not shown).

After the glue 2 has been supplied, the raw paper box 4 is held on the transport path while being sucked by the suction unit 31, and the raw paper 4 shown in FIG.
First, as shown in FIG.
The side provided with a is bent as shown by the arrow in the figure, and then the side provided with the bonding end 4b of the base paper 4 is bent and the glue is applied to the glued vertical piece 4a via the glue 2. Then, the adhesive end 4b is attached to the glued hanging piece 4a of the raw paper 4 to form a folded cardboard box 3 as shown in FIG. 6 (b).

The cardboard box 3 in the folded state is
Figure 6 (b), the portion indicated by P ₁ and P ₂ are in a state of superposition two cardboard sheets, the portion indicated by P ₃ are in a state superimposed three cardboard sheets. Incidentally, that glue adhesive portion for the portion indicated by P ₃ is a combined moiety attaching the bonding end portion 4b and the glue vertical strips 4a of manufacturing凾原paper 4.

[0041] Upon this the glue applying section P _3, the thickness becomes thicker than the other portions (portions indicated by P ₁ and P _2), since the variation in the thickness occurs, the transport of the cardboard box 3, this The conveyance state of the cardboard box 3 may become unstable due to the thickness variation. That is, when the cardboard box 3 is transported, the cardboard box 3 may be skewed or shifted left and right with respect to the transport direction due to the thickness variation.

For this reason, crushing rolls 6a, 6b, 7a and 7b are provided in a process (paper discharge section 13) before the folding section 5 for gluing the base paper 4. Then, the glued pieces 4 of the stencil base paper 4 are crushed by crushing rolls 6a and 6b disposed on the left side of the transport path of the stencil base paper 4.
a is adhered to the adhesive end 4 of the stencil base paper 4 by crushing rolls 7a and 7b disposed on the right side of the transport path of the stencil base paper 4.
b The crushed while sandwiching each Thus, as the thickness of the glue bond portion P ₃ by bonding with glue vertical strips 4a of manufacturing凾原paper 4 and the bonding end portion 4b becomes thinner, the other and so as to minimize the variation in the thickness of the portion (the portion indicated by P ₁ and P _2).

Note that these crushing rolls 6a,
6b, 7a and 7b will be further described later. The folded cardboard box 3 thus formed
Are feed rolls 21a and 21b as shown in FIG.
Through the counter ejector 14 on the downstream side. In this case, the cardboard box 3 in a folded state
In FIG. 6, the bonded portion is on the lower side (see FIG. 6B), and the bent portion is along the feeding direction.

As shown in FIG. 7, the counter ejector 14 includes a stacking hopper 10 including a front contact 24 and a rear guide 25 for stacking and storing the cardboard boxes 3 to be put therein, and a bottom portion of the stacking hopper 10. And a transfer conveyor 18 to be formed. Here, the forefront 2 of the stacking hopper 10
Numeral 4 regulates the movement of the cardboard box 3 to be loaded forward in the loading direction.

On the other hand, a scoring bar 22 is provided above the rear guide 25 constituting the stacking hopper 10, and the cardboard box 3 is
The movement of the cardboard box 3 to be inserted is regulated rearward, and the position of the cardboard box 3 to be inserted is corrected. Then, the cardboard box 3 put into the counter ejector 14 is lowered while its position is corrected by the forehead 24 of the stacking hopper 10 and the squaring bar 22, and is stacked on the transfer conveyor 18.

At this time, an air pressurizing blower 23 provided above the stacking hopper 10 is attached to the cardboard box 3 to be stacked.
To apply downward pressing force,
The stacked state of the cardboard boxes 3 is stabilized.
The movement of the cardboard boxes 3 stacked in the stacking hopper 10 is also restricted by the rear guide 25.

The transfer conveyor 18 includes a cylindrical roller 27 rotatably mounted on a fixed shaft 26 and a plurality of transfer conveyor belts 1 wound around the roller 27.
8a, and a plurality of transfer conveyor belts 18a are driven by drive rollers (not shown) to transfer the cardboard box 3. For this reason, the transfer conveyor 18 has a plurality of transfer conveyor belts 18a.
Are arranged such that a gap is formed between the upper surface of the cardboard box 3 and the lower end of the forehead 24 constituting the stacking hopper 10 so that the cardboard box 3 can be carried out.

The lowermost cardboard box 3 of the cardboard boxes 3 stacked in the stacking hopper 10 from this gap.
Are pulled out one by one and transported.
Then, the cardboard boxes 3 transferred by such a transfer conveyor 18 are stacked again on a stacking portion (not shown) on the downstream side of the transfer conveyor 18 and are carried out as a predetermined number of bundles to the outside. ing.

Next, the crushing roll according to the present embodiment will be described with reference to FIGS. Crushing rolls 6a, 6b, 7a, 7b of the present embodiment
Are disposed on the left and right sides of the transport path of the base paper 4 as described above, and are crushed while sandwiching the glued vertical piece 4a and the adhesive end 4b of the base paper 4 respectively. , as the thickness of the glue bond portion P ₃ by bonding with glue vertical strips 4a of manufacturing凾原paper 4 and the bonding end portion 4b becomes thinner, the other portion (portion shown by P ₁ and P ₂₎ The crushing rolls 6a and 7b according to the present embodiment are further provided with a glued vertical piece 4a and a glued end 4b of the base paper 4. The surface [glue surface (glue transfer supply surface)] is also configured to have a function of rough processing.

That is, as shown in FIG. 1, the glue-pending piece 4a of the base paper 4 is provided on the left side of the conveying path of the base paper 4.
Crushing rolls 6a and 6b for crushing while holding
Among them, the adhesive surface (glued surface) of the glued hanging piece 4a of the raw paper 4
As shown in FIG. 2, the crushing roll (adhesion side crushing roll) 6a in contact with the side is provided with a sandpaper-like bonding surface having a surface roughness of about 50 to 300 μm over the entire outer peripheral surface thereof. A belt (adhered surface processed portion) 8 is stuck. In FIG. 1, the bonding surface processing belt 8 is indicated by oblique lines.

Similarly, of the crushing rolls 7a and 7b which are provided on the right side of the transport path of the base paper 4 and crush while holding the adhesive end 4b of the base paper 4,
The crushing roll (bonding surface side crushing roll) 7b in contact with the bonding surface side of the bonding end 4b is also provided with a sandpaper-like bonding surface having a surface roughness of about 50 to 300 μm over the entire outer peripheral surface. Belt 8 is stuck.

In FIG. 2, the crushing roll 6
Although only a and 6b are shown, the crushing rolls 7a and 7b are similarly configured. Further, the belt 8 for processing an adhesive surface is hatched for easy understanding. In this case, the glue hanging piece 4a of the raw paper 4
Is designed to be transported on the left side of the transport path of the base paper 4, so that the bonding surface processing belt 8 is attached to the crushing rolls 6 a and 7 b.
When the glued vertical piece 4a is transported on the right side of the transport path of the base paper 4, the adhesive surface processing belt 8 is attached to the crushing rolls 6b and 7a.

Such crushing rolls 6a, 7a
As shown in FIG. 1, the crushing rolls 6a and 7a are arranged coaxially above a conveying path of the base paper 4 via a rotating shaft 9a. It is configured as a drive roll that is forcibly rotated and driven by the driving means via the rotating shaft 9a. As shown in FIG. 1, the crushing rolls 6b and 7b are disposed coaxially below the conveying path of the base paper 4 via a rotating shaft 9b.
b and 7b are configured as free rolls that freely rotate so as to follow the base paper 4 being conveyed.

In FIG. 1, reference numerals 16a and 16b denote cleaner rolls, and reference numerals 17a and 17b denote slotter rolls. Since the crushing roll provided in the corrugated cardboard sheet processing apparatus as one embodiment of the present invention is configured as described above, it has the following operations and effects. First, the operation of the adhesive surface processing belt 8 attached to the crushing rolls 6a and 7b will be described. FIG. 3 is a schematic diagram showing the processing state. Although only the crushing roll 6a is shown in FIG. 3, the same applies to the crushing roll 7b.

As described above, the crushing rolls 6a and 6b hold the sliver 4a of the stencil paper 4 and convey it while crushing it. For this reason, the glued vertical piece 4a of the base paper 4 that has been conveyed starts to contact the bonding surface processing belt 8 attached to the outer peripheral surface of the crushing roll 6a at point B in FIG. In FIG. 3, it is transported while being crushed, and is most crushed at point A in FIG.

Here, since the crushing roll 6a also serves to transport the base paper 4, the rotation speed of the crushing roll 6a is V
(Indicated by an arrow in FIG. 3), the conveying speed at the point A which is most crushed among the glued vertical pieces 4a of the base paper 4 conveyed thereby is also V (in FIG. Show)
Becomes In this case, at the point B where the glued hanging pieces 4a of the conveyed base paper 4 start contacting the adhesive surface processing belt 8 attached to the outer peripheral surface of the crushing roll 6a, the point of the base paper 4 The surface of the glued vertical piece 4a (the glued surface, that is, the adhesive surface) starts to be crushed, and the transport speed in the direction along this surface is Vcos θ.

For this reason, at point B, the transport speed Vcos θ of the surface (glue surface, that is, the adhesive surface) of the glued vertical piece 4a of the base paper 4 and the rotation speed V of the crushing roll 6a are very small. A speed difference will result. Due to this speed difference, the adhesive surface processing belt 8 attached to the outer peripheral surface of the crushing roll 6 a
The adhesive surface (a) is slid and scratched on the adhesive surface, whereby the adhesive surface (glued surface) of the glued vertical piece 4a of the base paper 4 is roughened. That is, the adhesive surface processing belt 8 causes fine abrasions on the adhesive surfaces of the glued vertical pieces 4a and the adhesive end portions 4b, or makes holes, thereby forming irregularities on each adhesive surface. Become.

As described above, the glued vertical piece 4a of the base paper 4 is crushed and deformed by the crushing roll 6a to utilize the minute speed difference caused by deformation. 4a is roughened, and the crushing roll 6a rotates at substantially the same speed as the conveying speed of the base paper 4, so that the conveying force of the crushing roll 6a can be reduced. The transporting force is almost the same as the transporting force of the crushing roll, and no extra force is applied, so that the transporting state of the base paper 4 is not unstable.

Further, the glued hanging pieces 4a of the base paper 4 are crushed and deformed by the crushing roll 6a, and a small speed difference caused by the deformation is used to form the glued hanging pieces 4a of the raw paper 4. Since the bonding surface (glued surface) is roughened, the bonded surface of the glued vertical piece 4a of the raw paper 4 is not scraped off more than necessary, so that a large amount of paper dust is not generated. In addition, it is possible to obtain a uniformly rough surface on the adhesive surface of the glued vertical piece 4a of the base paper 4 without partially shaving the surface.

When the base paper 4 is introduced into the crushing rolls 6a, 6b, 7a, 7b having the above-described functions and effects, the base paper 4 is crushed by the crushing rolls 6a, 6b, 6b.
7a and 7b, the squashed pieces 4a and the bonding end 4b of the base paper 4 are made thinner, and at the same time, the glue pendants 4a and the bonding end of the base paper 4. The surface of each bonding surface of 4b is formed roughly.

As a result, the glued vertical pieces 4 of the raw paper 4
a and the adhesive surface of the adhesive end 4b, the moisture contained in the glue 2 transferred and supplied via a gluing roll easily penetrates,
Since the quick drying property can be greatly improved, a predetermined adhesive force can be obtained in a short time. Therefore, when sending out the cardboard box 3 from the stacking hopper 10, the bonding portion 3
Since c has sufficient adhesive strength, the fish tail R
Is less likely to occur.

Further, since the generation of the fish tail R is suppressed in this way, there is an advantage that the quality such as the aesthetic quality and the dimensional accuracy quality at the time of assembling the cardboard box 3 can be greatly improved. Furthermore, since the quick-drying property of the glue 2 is greatly improved, there is also an advantage that it is not necessary to take a sufficient time for glue drying, and the productivity of the cardboard box can be improved.

Further, since the adhesive surface processing belt 8 can be easily attached to the crushing rolls 6a and 7b, there is an advantage that the apparatus can be easily improved and the production cost can be reduced. Next, a modification of the embodiment of the present invention will be described. In the crushing roll of the present modified example, instead of sticking a belt for bonding surface processing in which fine irregularities are formed like sandpaper on the surface of the crushing roll, a sand-like shape is applied to the outer peripheral surfaces of the crushing rolls 6a and 7b. By directly spraying the particles, the surface of the crushing rolls 6a, 7b is formed coarsely, so that an adhesive surface processed portion is formed on the outer peripheral surfaces of the crushing rolls 6a, 7b.

In this case, the material of the particles directly sprayed may be ceramic, metal, or other various materials. By roughing the surface of the crushing roll in this way, the same operation and effect as in the above-described embodiment can be achieved.
The effect is obtained. The crushing roll according to the present embodiment is configured to convey while sandwiching and crushing the base paper 4 for making, but holding it in the state of the corrugated cardboard sheet 1 before forming the base paper 4 for making. It may be configured to transport while crushing.

In the present embodiment, both the vertical pieces (adhesive portion) 4a and the adhesive end (adhesive portion) 4b of the base paper 4 are paired up and down so as to be crushed and processed. Lashing rolls 6a, 6b, 7a, 7b are provided, and further, an adhesive surface processing section 8 for roughly processing each adhesive surface of the glued vertical piece 4a and the adhesive end 4b of the base paper 4 is provided with a corresponding crushing roll 6a. , 7b, for example, in order to crush and process only one of the glued vertical piece 4a and the bonding end 4b of the base paper 4, the crushing rolls 6a,
It is also conceivable to provide only one of the crushing rolls 6b and the crushing rolls 7a and 7b, and to provide the bonding surface processing portion 8 on the side in contact with the bonding surface of the one crushing roll.

Further, even if the crushing rolls 6a, 6b, 7a and 7b are provided on the left and right, respectively, and the bonding surface processing portion 8 is provided on only one of them, there is a certain effect. That is, by performing crushing and surface roughening simultaneously on at least one of the bonding portions 4a or 4b, it is possible to simultaneously reduce the thickness of the bonding portion and strengthen the bonding of the bonding portion, which is effective. .

[0067]

As described above in detail, according to the corrugated cardboard sheet processing apparatus of the first aspect of the present invention, when the corrugated cardboard sheet is conveyed while being crushed, the bonding surface of the crushing roll. Since the processing portion roughens the bonding surface of the bonding portion of the corrugated cardboard sheet, there is an advantage that a sufficient bonding force can be obtained in a short time without affecting the conveyance state of the corrugated cardboard sheet. is there. As a result, the occurrence of fish tail is suppressed,
In a subsequent step, the cardboard box can be formed with appropriate quality.

According to the corrugated cardboard sheet processing apparatus of the present invention, when the corrugated cardboard sheet is conveyed while being crushed at the right and left end portions, the corrugated cardboard sheet is processed by the bonded surface processing section of the crushing roll. Since the bonding surfaces of the bonding portions provided at the left and right end portions of the corrugated cardboard sheet are each roughly processed, it is possible to obtain a sufficient bonding force in a shorter time without affecting the conveyance state of the corrugated cardboard sheet. There is an advantage that can be.

According to the corrugated cardboard sheet processing apparatus of the third aspect of the present invention, the belt for bonding surface processing is attached to the outer peripheral surface of the crushing roll, and the formation of the bonding surface processing portion of the crushing roll is easy. , With a simple configuration,
There is an advantage that a sufficient adhesive strength can be obtained in a short time without affecting the conveyance state of the corrugated cardboard sheet.

According to the fourth aspect of the present invention, since the sand-like particles are directly sprayed on the outer peripheral surface of the crushing roll, it is easy to form the processed portion of the adhesive surface of the crushing roll. With a simple configuration, there is an advantage that a sufficient adhesive force can be obtained in a short time without affecting the conveyance state of the cardboard sheet.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a crushing roll according to an embodiment of the present invention.

FIG. 2 is a side view schematically showing a crushing roll according to one embodiment of the present invention, and is a side view as viewed from an arrow A in FIG.

FIG. 3 is a diagram for explaining an operation of a crushing roll according to one embodiment of the present invention.

FIG. 4 is a schematic view showing the entire configuration of a conventional cardboard box making machine.

FIG. 5 is a plan view schematically showing a base paper made by a conventional cardboard box making machine.

FIGS. 6A and 6B are schematic views for explaining the assembly of a cardboard box formed in a conventional cardboard box making machine, wherein FIG. 6A shows an assembly stage and FIG.

FIG. 7 is a schematic view showing a counter ejector in a conventional cardboard box making machine.

FIG. 8 is a view for explaining a problem of a conventional cardboard box making machine.

FIG. 9 is a diagram for explaining a problem in processing an adhesive surface in a conventional cardboard box making machine.

FIG. 10 is a view for explaining a problem in processing an adhesive surface in a conventional cardboard box making machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Corrugated cardboard sheet 2 Glue 3 Folded cardboard box 4 Baseboard paper (corrugated cardboard sheet) 4a Paste with glue (adhesive part) 4b Adhesive end part (adhesive part) 5 Folding part 6a, 7b Crushing roll (adhesive 6b, 7a Crushing roll 8 Adhesive surface processing belt (adhesive surface processing portion) 9a, 9b Rotary shaft 10 Stacking hopper 11 Paper feed unit 12 Printing unit 13 Paper discharge unit 14 Counter ejector 15 Kicker 16a , 16b Creaser roll 17a, 17b Slotter roll 18 Transfer conveyor 18a Transfer conveyor belt 19 Suction belt 20 Forming belt 21 Feed roll 22 Scaring bar 23 Air pressurizing blower 24 Forehead 25 Rear guide 26 Fixed shaft 27 Roller 30 Corrugated box machine 31 Suction unit 50 roll 1 wire brush 52 rolls 60 roll 61 needle-like projections 62 roll 106a, 106b crushing rolls 107a, 107b crushing roll

Claims (4)

[Claims] 1. A pair of upper and lower crushing rolls which convey while nipping and crushing an adhesive portion of the corrugated cardboard sheet while rotating at the same speed as the conveying speed of the corrugated cardboard sheet, wherein the crushing roll comprises A corrugated cardboard sheet processing apparatus, comprising: an adhesive surface processing section for roughly processing an adhesive surface of an adhesive section. 2. An adhesive portion is provided at left and right ends of the corrugated cardboard sheet, and the upper and lower pair of crushing rolls are provided with the adhesive surface processed portions corresponding to the adhesive surface of the adhesive portion. The corrugated cardboard sheet processing apparatus according to claim 1, wherein: 3. The bonding surface processing section is characterized in that a bonding surface processing belt having a rough surface formed in a sandpaper shape is attached to an outer peripheral surface of the crushing roll. 3. The corrugated sheet processing apparatus according to 1 or 2. 4. The corrugated cardboard sheet processing apparatus according to claim 1, wherein the bonded surface processing portion is formed by directly spraying sand-like particles on an outer peripheral surface of the crushing roll. .