JP5488150B2 - Paper box blanks pressure bonding auxiliary member and method of using the same - Google Patents

Description

  The present invention relates to an auxiliary member used for pressure bonding with a pressure-bonding belt in the formation of paper box blanks and a method for using the auxiliary member.

Paper containers are widely used mainly for food. After using the contents, it can be easily folded and incinerated, so it is used in a wide range.
2. Description of the Related Art Conventionally, a paper container that is bent by a ruled line such as a paper box or the like has been used in accordance with the nature of the contents stored in the container and the storage condition, or a paper-based laminate. Then, this paper or laminate is punched into a predetermined shape according to the shape of the container, and at the same time, it is formed as blanks with a ruled line for bending. A paper container is manufactured by bending the blanks along a ruled line and assembling and bonding necessary parts (see, for example, Patent Document 1).

  As shown in the block diagram in Fig. 1, the paper box blanks are formed into a container in order from the upstream side of normal blanks conveyance, in order from the paper feeding unit, folding unit, bottom folding unit, gluing unit, main folding unit, and crimping conveyance. This is performed using a box making machine configured by arranging a front part and a front part (see, for example, Patent Document 2).

When a general paper box blank is folded to form a box, the blank is first fed from the paper feeding unit (A) to the folding unit (B) and then folded, and then the bottom folding unit (C). The bottom plate is folded inward and overlapped on the side plate, and the ear is folded outward.
Next, in the gluing part (D), after forming an adhesive layer on the back side of the ear part and the front side of the side plate flap, the remaining bottom plate is folded inward and overlapped on the side plate.

Next, in the main folding part (E), by folding the side plate and folding one bottom plate on the other bottom plate, the adhesive layer of the ear portion of one bottom plate adheres to the other bottom plate, and the side plate flap The adhesive layer adheres to the side plate, and the folded paper box is completed.
In this state, the drying of the bonded portion of the paper box has not been completed. Therefore, the paper box is transported while being crimped by a pair of upper and lower pressure-bonding belts of the pressure-feeding and transporting section (F), thereby promoting the adhesion of the paper box and completing the molding. The folded paper box flowing from the conveyor at the front portion (G) is packed into a corrugated cardboard by a constant amount, and is then flowed to the next process. In the next process, the contents are filled and the lid is closed to make a product, but this process is often performed by a customer or an outside contractor.

In this crimping and transporting process, the folded paper boxes are transported while continuously overlapping, so the pressure on the adhesive layer by the pressure belt is applied to each paper box through the thickness of the overlapping paper boxes. Added.
FIG. 2 shows a schematic cross-sectional view of an example of a conventional crimping and conveying process.

  In the crimping conveyance part (1), the paper box (10) folded in a state in which drying of the bonded portion transferred from the main folding device is not completed is carried out between the upper crimping belt (4) and the lower crimping belt (5). The sheet is conveyed by pressure from the paper feed side (8) to the discharge side (9) while being continuously sandwiched while being pressurized. 2 indicate the moving direction of the pressure-bonding belt, and the white arrows between the pressure-bonding belts indicate the conveyance direction of the folded paper box.

The upper and lower crimping belts are hung on the upper crimping conveyor (2) and the lower crimping conveyor (3), respectively, and moved by the rotation of the pulley, and the lower crimping belt is moved up and down by an air cylinder. By (7), it moves up and down, and it is a mechanism that conveys the paper box (10) while applying vertical pressure.

  In a state where the pressure in the vertical direction applied to the paper box is conveyed while continuously overlapping in the front-rear direction, the pressure is transmitted through the thickness of the paper box overlapped vertically, so that the leading part (f) and the trailing part (b) Except for this, it is almost constant. However, the pressure does not become constant because there is a portion where the thickness of the overlapped paper box decreases in the head portion and the tail portion.

  For this reason, especially in the first and last parts of the paper boxes that are transported continuously, there are few front and rear paper boxes, so the pressure is insufficient and the occurrence of defective adhesives due to peeling of the glue is often observed. As seen, the occurrence of defects due to insufficient pressure sometimes reached 40 sheets or more, and improvement was demanded as a major cause of quality loss.

JP-A-7-223627 JP-A-10-128873

  It is an object of the present invention to provide a paper box blanks crimping auxiliary member that prevents the occurrence of poor adhesion due to insufficient pressure at the time of crimping and conveyance in the molding of a paper box, and a method for using the same.

  The invention according to claim 1 of the present invention is an auxiliary member used in the process of crimping and conveying conveyors for paper box blanks, and is made of an elastic material and has a rectangular shape larger than the size of the folded folded paper box. The paper box blanks pressure bonding assisting member is characterized in that the thickness of the head is different from the thickness of the tail.

  The invention according to claim 2 of the present invention is characterized in that the elastic material consists of two layers of an inner layer and an outer layer, and the outer layer is the same material as the belt of the crimping conveyor. It is a paper box blanks crimping auxiliary member of description.

  The invention according to claim 3 of the present invention is characterized in that the leading end portion and the trailing end portion of the elastic material are cut obliquely when viewed from the side. This is a paper box blanks crimping auxiliary member.

  The invention according to claim 4 of the present invention is described in any one of claims 1 to 3 on the most upstream side and the most downstream side of the continuous overlap of the folded paper boxes conveyed by the crimping conveyer. It is a usage method of the paper box blanks pressure bonding auxiliary member characterized by arranging the paper box blanks pressure bonding auxiliary member.

  The invention according to claim 5 of the present invention is characterized in that the paper box blanks crimping auxiliary members arranged on the most upstream side and the most downstream side are obtained by inverting members of the same structure in the front-rear direction. It is the usage method of a paper box blanks crimping auxiliary member.

According to the invention of claim 1 of the present invention, it is made of an elastic material, has a rectangular outer dimension that is equal to or larger than the size of the folded paper box to be conveyed, and the front thickness is different from the rear thickness. Because it is a paper box blanks crimping auxiliary member characterized by that, it is possible to adjust the pressure from the crimping conveyor at the front and rear positions by sandwiching it in the necessary place of the continuous overlapping row of folded paper boxes It becomes possible. At this time, the outer dimension of the auxiliary member is a rectangular outer dimension that is larger than the outer dimension of the folded paper box to be conveyed, so that the pressure adjustment is less likely to be affected even if the insertion position is out of order. .

According to the invention according to claim 2 of the present invention, since the elastic material consists of two layers of the inner layer and the outer layer, it is easy to obtain desired elasticity with an appropriate thickness, and the surface of the member can be easily obtained. The characteristics and overall elasticity can be designed freely.
Furthermore, since the outer layer that contacts the folded folded paper box is made of the same material as the belt of the pressure-conveying conveyer, it is possible to prevent the product from being injured or damaged due to frictional resistance due to pressure contact.

  According to the invention according to claim 3 of the present invention, the leading end portion and the trailing end portion of the elastic material are cut obliquely when viewed from the side, so that the folded state to be conveyed is It is easy to fit when arranged diagonally before and after the row of paper boxes, and the influence of the step due to the thickness of the member can be minimized.

  According to the invention according to claim 4 of the present invention, the paper box blanks crimping auxiliary member is arranged on the most upstream side and the most downstream side of the continuous overlap of the folded paper boxes conveyed by the crimping conveyer, thereby crimping. It has become possible to suppress quality loss by making up for the shortage of pressure on the upstream end side and the downstream end side where adhesion failure due to unevenness is most likely to occur, that is, pressure shortage is likely to occur.

  According to the invention according to claim 5 of the present invention, by using two members of the same structure as the paper box blanks pressure bonding auxiliary member arranged on the most upstream side and the most downstream side in the direction reversed in the front-rear direction, the type and number of members In addition, it is possible to provide a cheap and reliable method for using a paper box blanks pressure bonding auxiliary member that is less likely to cause errors due to many types.

  In this way, it has become possible to effectively suppress the occurrence of defective adhesion due to the peeling of the adhesive particularly in the leading and trailing portions of the paper box that is continuously conveyed in the crimping and conveying step. As a result, it has become possible to eliminate the cause of quality loss due to the occurrence of adhesion failure due to insufficient pressure during pressure-bonding conveyance in the formation of paper boxes.

A configuration example of a box making machine that forms a paper box blank into a container. The cross-sectional schematic diagram which shows the conventional crimp conveyance process. The cross-sectional schematic diagram which shows the crimping | compression-bonding conveyance process using the crimping | compression-bonding auxiliary member of this invention. The cross-sectional schematic diagram of an example of the crimping | compression-bonding auxiliary member of this invention. (1) shows a section in use, and (2) shows a section of the crimping auxiliary member.

Hereinafter, an embodiment of a paper box blanks pressure bonding auxiliary member and a method of using the same according to the present invention will be described with reference to the drawings as necessary.
FIG. 4 is an enlarged schematic view of an example of the crimping auxiliary member of the present invention. (1) of FIG. 4 is a schematic cross-sectional view showing a state in use, and (2) of FIG. 4 is an enlarged schematic view of (1) showing the structure of the member.

  The crimping auxiliary member (11) of the present invention is made of an elastic material, has a rectangular outer dimension that is equal to or larger than the size of the folded folded paper box, and has a leading thickness different from the trailing thickness. This is a crimping auxiliary member.

This member (11) is composed of an inner layer (12) made of a cushioned plate-like rubber and the like and a sheet-like outer layer (13) made of the same material as the surface of the pressure-conveying and conveying belt. ) Is a member that is larger than the rear side thickness (Db). Note that the distinction between the head side and the tail side as a member is for the sake of convenience of explanation, and when using a member, the same member may be used by inverting the front and rear at the head side position and the tail side position. There is no need to distinguish between front and back.

  In the state of use shown in (1) of FIG. 4, the leading end of the folded paper box (10) is obtained because the leading side thickness (Df) of the member is larger than the trailing side thickness (Db). When the thicker side is placed at the front end and the stepped portion of the outer layer is placed at the lower side (11f), the pressure is insufficient when the paper box located at the top part (f) of the row is crimped and conveyed. It is possible to prevent adhesion failure due to.

  Similarly, using a member whose leading side thickness is smaller than the trailing side thickness, the outer side layer of the folded paper box (10) with the thick side as the trailing side at the end of the trailing side. If the portion without a step is placed on the upper side (11b), it is possible to prevent poor adhesion due to insufficient pressure at the time of crimping and transporting the paper box located at the tail portion (b) of the row.

  As shown in (2) of FIG. 4, the elastic material is composed of two layers of an inner layer (12) and an outer layer (13), and the outer layer of the crimping conveyor shown in (1) of FIG. The same material as the upper crimping belt (4) and the lower crimping belt (5) makes it possible to apply auxiliary component molds to the surface of the paper box due to frictional resistance against the product surface even when it is in pressure contact with the folded paper box being conveyed. It is less likely to leave traces such as.

In a state where the outer layer (13) is wrapped around and adhered to the surface of the inner layer (12), the surface that contacts the paper box surface during use may be a flat surface, and the non-contact surface may have a step.
Although FIG. 4 shows a state in which the end of the outer layer is bonded to the stepped surface, the outer layer may or may not be on the surface that does not contact the folded paper box.

Furthermore, in order to more reliably prevent the traces of the auxiliary member mold and the like from sticking to the paper box during the crimping conveyance, as shown in FIG. It is desirable to provide diagonal cut portions (14) and (15) at an angle that is close to the direction parallel to the pressure-bonding belt.
FIG. 4 shows the case where the outer layer (13) is wrapped including the cut surface of the cut inner layer (12), but after the outer layer is wrapped around the inner layer before cutting. You can cut from.

As the inner layer (12) used for the paper box blanks pressure bonding auxiliary member of the present invention, it is typically necessary to use a SBR plate having a hardness of 60 degrees and having an appropriate thickness of about 7 mm as a single body or in layers. If there is a good elasticity, it is not limited to these.
As the outer layer (13), a general rubber material such as NBR having a thickness of about 3 mm is preferably used.
In this case, the same material as that used for the surfaces of the pressure-bonding belts (4) and (5) is desirable.

Next, the usage method of the paper box blanks crimping auxiliary member of this invention is demonstrated.
In this crimping and transporting process, the folded paper boxes are transported while continuously overlapping, so the pressure on the adhesive layer of the paper box by the upper and lower crimping belts passes through the thickness of the overlapping paper boxes. Added.
FIG. 3 is a schematic cross-sectional view showing a crimping conveyance process using the crimping auxiliary member of the present invention.

In the crimping conveyance section (1), the paper box (10) which is transferred from the main folding apparatus and is folded in a state where the drying of the bonded portion is not completed is made to be the upper crimping belt (4) and the lower crimping belt (5). While being pressed from above and below while being pressed, the sheet is conveyed in a pressure-bonding direction from the paper feed side (8) to the discharge side (9).
3 indicate the moving direction of the pressure-bonding belt, and the white arrows between the pressure-bonding belts indicate the conveyance direction of the folded paper box.

  The upper and lower crimping belts (4) and (5) are hung on the upper crimping conveyor (2) and the lower crimping conveyor (3), respectively, and are moved by the rotation of pulleys. It is a mechanism that conveys the paper box (10) that is pressed and folded by the lower roll (7) that moves up and down by applying a vertical pressure.

  In such a crimping conveyance unit, the leading portion (11f) and the trailing portion (11b) of the folded row of paper boxes in a state where the paper box blanks crimping auxiliary member of the present invention is conveyed while continuously overlapping in the front-rear direction. ), The vertical pressure applied to the paper box can be made substantially constant including the leading portion (f) and the trailing portion (b) where the thickness of the stacked paper boxes is small.

  For this reason, by using the paper box blanks pressure bonding auxiliary member of the present invention, there are few front and rear paper boxes that have been seen in the past, especially in the first and last parts of the paper box that is continuously conveyed. The generation of poor adhesion due to adhesive peeling caused by insufficient pressure during crimping conveyance was eliminated, and the major cause of quality loss could be eliminated.

  Further, by using the paper box blanks pressure bonding auxiliary members (11f) and (11b) arranged on the most upstream side and the most downstream side, the same structure member (11) is reversed in the front-rear direction, so that the leading portion and the trailing portion can be more easily used. Not only can the occurrence of defects in the part be prevented, but depending on the continuous time of the work, the member used at the top part can be taken out in a series of work and turned upside down to be used for the tail part. In some cases, such a usage can also add an effect that the member can be used more efficiently.

A: Paper feeding part B: Folding part C ... Bottom folding part D ... Gluing part E ... Main folding part F ... Crimping conveyance part G ... Preliminary transfer part 1 ... Crimping conveyance part 2 ... Upper crimping conveyance conveyor 3 ... Lower crimping Conveyor 4 ... Upper pressure bonding belt 5 ... Lower pressure bonding belt 6 ... Upper roll 7 ... Lower roll 8 ... Paper feed side 9 ... Discharge side 10 ... Folded paper box 11f ... Leading auxiliary component 11b ... Trailing auxiliary component 12 ... inner layer 13 ... outer layer 14 ... cut part 15 ... cut part Df ... head side thickness Db ... tail side thickness f ... head side b ... tail side

Claims (5)

  It is an auxiliary member used in the process of crimping and conveying conveyors for paper box blanks, made of elastic material, has a rectangular outer dimension that is equal to or larger than the size of the folded paper box to be conveyed, and has a leading thickness A paper box blanks pressure bonding auxiliary member characterized by being different in thickness from the tail.   The paper box blanks crimping auxiliary member according to claim 1, wherein the elastic material is composed of two layers of an inner layer and an outer layer, and the outer layer is made of the same material as the belt of the crimping conveyor.   The paper box blanks crimping auxiliary member according to claim 1 or 2, wherein the leading end portion and the trailing end portion of the elastic material are cut obliquely when viewed from the side.   The paper box blanks crimping auxiliary member according to any one of claims 1 to 3, wherein the paper box blanks crimping auxiliary member according to any one of claims 1 to 3 is arranged on the most upstream side and the most downstream side of the continuous overlapping of the folded paper boxes conveyed by the crimping conveyor. How to use a paper box blanks pressure bonding auxiliary member.   The method of using a paper box blanks pressure bonding auxiliary member according to claim 4, wherein the paper box blanks pressure bonding auxiliary members arranged on the most upstream side and the most downstream side are obtained by inverting a member having the same structure.

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