JP3626474B2 - Corrugated paper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to corrugated paper, and in particular, a pair of corrugated sheets formed in a corrugated shape are bonded together by bonding the tops thereof, and a flat plate sheet is bonded to both outer sides of the bonded corrugated sheets. It relates to a corrugated cardboard.
[0002]
[Prior art]
In general, corrugated paper as shown in FIG. 7 is known (for example, Japanese Patent Laid-Open No. 1-196334). The corrugated paper S has a pair of corrugated sheets W (Wa, Wb) formed in a corrugated shape and bonded to each other by joining the top portions t to each other, and flat plates are formed on both outer sides of the corrugated sheets Wa, Wb. A flat plate sheet F (Fa, Fb) is attached to form.
This corrugated paper S is manufactured as follows. For example, in the above-mentioned Japanese Patent Application Laid-Open No. 1-196334, as shown in FIG. 8, the roll paper 1 is fed out and one corrugated sheet Wa is formed by the forming rollers 2 and 3, and the adhesive sheet is bonded thereto by the adhesive applicator 4. An agent is applied, the roll paper 5 is drawn out, the other corrugated sheet Wb is formed by the forming roller 6 and the forming belt 7, and the one corrugated sheet Wa and the other formed between the forming roller 2 and the forming belt 7. The corrugated sheet Wb is sandwiched immediately after molding, and the top portions t of the corrugated sheet W are bonded and bonded together. The corrugated sheet W is conveyed by the forming belt 7 and heated by the heater 8 in the course of conveyance. An adhesive is applied to the corrugated sheet Wa by the adhesive applicator 9, and the roll paper 10 is fed out as one flat sheet Fa in the course of conveyance to adhere to the corrugated sheet Wa, and then the other Waveform sea The adhesive is applied by adhesive applicator 11 to Wb, then by feeding the roll paper 12 as the other of the flat sheet Fb adhered to the other corrugated sheet Wb, it is the product.
[0003]
[Problems to be solved by the invention]
By the way, in such a conventional corrugated paper S, when the roll papers 1 and 5 are fed out and formed by the forming rollers 2, 3, 6 and the forming belt 7 at the time of manufacture, the corrugated sheet Wa is inevitably used. Expansion and contraction occurs in the other corrugated sheet Wb, resulting in a difference in tension, the top of one corrugated sheet and the top of the other corrugated sheet are displaced, the top falls into the recess, and the predetermined thickness cannot be maintained. Further, the strength and cushioning property that the corrugated cardboard should have will be reduced.
[0004]
The present invention has been made in view of the above-mentioned problems. Even when the top portions of at least one corrugated sheet are formed as flat portions, even if the top portions of the two corrugated sheets are out of phase with each other, the top portions can be reliably connected. An object of the present invention is to provide a corrugated paper that can be bonded to the paper.
[0005]
[Means for Solving the Problems]
The corrugated paper of the present invention made to solve such a problem is that a pair of corrugated sheets formed in a corrugated shape are bonded together by joining the tops of the corrugated sheets, and on both outer sides of the joined corrugated sheets. In the corrugated cardboard formed by adhering a flat plate sheet, the top of at least one corrugated sheet is configured as a flat part.
[0006]
According to the present invention, even if the phase of the corrugated sheet is slightly shifted, the top of at least one corrugated sheet is a flat plate having a predetermined width, so the other top is securely in contact with the flat top. Glued. For this reason, it is not necessary to arrange a phase matching device in the corrugated paper manufacturing apparatus. Moreover, since the top part of the corrugated sheet is formed in a flat plate shape, the convex part of the corrugated sheet becomes trapezoidal and cushioning properties are improved.
[0007]
If necessary, in the present invention, the top of one corrugated sheet is set to a dimension Xb, the pitch of the top of the other corrugated sheet is set to Pa, and Xb is set to a dimension equal to or larger than Pa. Thereby, the top part of one or more other corrugated sheets is arrange | positioned reliably at a flat top part.
[0008]
Furthermore, in the present invention, the flat part dimensions of the top portions of both corrugated sheets can be set to Xa and Xb, the adjacent flat part dimensions can be set to Ya and Yb, respectively, and Xb can be set to a dimension greater than Ya. Thereby, the top part of one or more other corrugated sheets is arrange | positioned reliably at a flat top part. Moreover, since the top part of two corrugated sheets is made flat, the convex part of a corrugated sheet becomes trapezoid, and cushioning properties further improve.
[0009]
And in this invention, even if it is a case where a corrugated sheet expands and contracts and the phase of a top part has shifted | deviated, the top part of one corrugated sheet and the top part of the other corrugated sheet can be joined. Thereby, the top part of the other corrugated sheet is reliably arrange | positioned at the flat top part.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, based on an accompanying drawing, corrugated paper concerning an embodiment of the invention is explained in detail. A cardboard production system will be described.
The two sheets constituting the corrugated paper are manufactured by the sheet manufacturing apparatus 20 shown in FIG. This device is formed in a rectangular wave shape, a first toothed drum 21 having teeth 22 having a predetermined shape, a second toothed drum 23 having teeth 24 meshing with the toothed drum 21, and the like. An adhesive application drum 25 for applying glue to the pair of corrugated sheets W (Wa, Wb), and an attaching drum 26 for attaching the flat sheet F (Fa, Fb) to the corrugated sheets to which glue has been applied. Then, a corrugated sheet is formed and a flat sheet is laminated to the corrugated sheet to produce one half-finished product. The tooth shapes of the first and second forming drums 21 and 23 are appropriately selected according to the shape of the corrugated sheet of corrugated paper to be manufactured.
[0011]
Then, the two corrugated sheets manufactured in this way are bonded together on the corrugated sheet side. Accordingly, the corrugated cardboard is formed by bonding the top portions to each other and bonding the flat plate sheets F (Fa, Fb) to both outer sides of the bonded corrugated sheets W (Wa, Wb). Paper S is manufactured.
[0012]
Reference numeral 50 denotes a bonding machine that bonds the corrugated sheets W to each other by joining the corrugated sheets W to the one-side semi-finished product Sa and the other-side semi-finished product Sb that are suspended and conveyed. The bonding machine 50 includes a glue application machine 51 for gluing the top part t of the corrugated sheet W, and phase matching for matching the phases of the top parts t of the corrugated sheet W in the one-side semi-finished product Sa and the other-side semi-finished product Sb. The mechanism 52 includes a joining mechanism 60 that presses and joins the one-side semi-finished product Sa and the other-side semi-finished product Sb phase-matched by the phase matching mechanism 52 from above and below.
As shown in FIG. 6, the phase matching mechanism 52 is provided immediately before the joining mechanism 60, and has one side gear 53 that meshes with the corrugated sheet W of the one side semi-finished product Sa, and one side with respect to the one side gear 53. The pressing roller 54 that presses the side semi-finished product Sa, the other side gear 55 that meshes with the corrugated sheet W of the other side semi-finished product Sb, and the pressing roller 56 that presses the other side semi-finished product Sb against the other side gear 55. It is prepared for. The one-side gear 53 and the other-side gear 55 have the same number of teeth and the same size, and are rotated in synchronization with each other so that the top portions t of the corrugated sheet W are aligned.
[0013]
The joining mechanism 60 includes a belt conveyor 61 that supports and conveys the one-side semi-finished product Sa and the other-side semi-finished product Sb from below, and the one-side semi-finished product Sa and the other-side semi-finished product from above with respect to the belt conveyor 61. It comprises a plurality of presser rollers 62 that hold Sb. A cutting machine 70 cuts the product bonded by the bonding machine 50 into a required shape. The cutting machine 70 cuts the product vertically and horizontally to form a rectangular sheet. In FIG. 6, reference numeral 71 denotes a conveyance roller.
[0014]
Next, embodiments of the corrugated paper according to the present invention will be described. FIG. 1 shows corrugated paper S1 according to the first embodiment of the present invention. In this example, the corrugated sheet Wa of one half-finished product has a sine wave shape, a flat portion P is provided at the tip of the corrugated sheet Wb of the other half-finished product, and has a rectangular wave shape with the same cycle as the sine wave. The top part T of the corrugated sheet Wa is bonded to the flat part P of the corrugated sheet Wb on the other side. According to this example, even if expansion and contraction occurs in the semi-finished product sheet, the top portion T of the corrugated sheet Wa on one side and the flat portion P of the corrugated sheet Wb on the other side can be reliably bonded. For this reason, it is not necessary to arrange a phase matching device in the corrugated paper manufacturing apparatus. Moreover, since the top part of the corrugated sheet is formed in a flat plate shape, the convex part of the corrugated sheet becomes trapezoidal and cushioning properties are improved.
[0015]
FIG. 2 shows a corrugated paper S2 according to the second embodiment of the present invention. In this example, the corrugated sheet Wa of one half-finished product has a sine wave shape, a flat portion P is provided at the tip of the corrugated sheet Wb of the other half-finished product, and has a rectangular wave shape with a longer period than the sine wave. The top part T of the corrugated sheet Wa is bonded to the flat part P of the corrugated sheet Wb on the other side. Therefore, in this example, the top of one corrugated sheet is set to a dimension Xb, the pitch of the top of the other corrugated sheet is set to Pa, and Xb is set to a dimension equal to or larger than Pa. Thereby, the top part of one or more other corrugated sheets is arrange | positioned reliably at a flat top part.
[0016]
FIG. 3 shows a corrugated paper S3 according to a third embodiment of the present invention. In this example, the corrugated sheets Wa and Wb of the semi-finished products on the one side and the other side are formed in a rectangular wave shape having the same cycle, and the flat portions P of the corrugated sheet Wa on the one side and the corrugated sheet Wb on the other side are bonded. According to this example, even if expansion and contraction occurs in the semi-finished product sheet, the flat part P of the corrugated sheet Wa on one side and the flat part P of the corrugated sheet Wb on the other side can be reliably bonded. For this reason, it is not necessary to arrange a phase matching device in the corrugated paper manufacturing apparatus. Moreover, since the top part of the corrugated sheet is formed in a flat plate shape, the convex part of the corrugated sheet becomes trapezoidal and cushioning properties are improved.
[0017]
FIG. 4 shows a corrugated paper S4 according to a fourth embodiment of the present invention. In this example, a flat portion P is provided at the front ends of the corrugated sheet Wa of the one-side semi-finished product and the corrugated sheet Wb of the other-side semi-finished product to form a rectangular wave shape. Then, the rectangular wave period (Xb + Yb) of the other corrugated sheet Wb is longer than the rectangular wave period (Xa + Ya) of the one corrugated sheet Wa, and the apex T of the corrugated sheet Wa on the one side and the other side The flat portion P of the corrugated sheet Wb is adhered. Therefore, in this example, the top of one corrugated sheet is set to a dimension Xb, the pitch of the top of the other corrugated sheet is set to Pa, Xb is set to a dimension greater than Pa, and Xa is set to a dimension greater than Yb. This ensures that the top portion of the one or more other corrugated sheets is reliably disposed on the flat top portion, and the flat portion of the first semi-finished product does not fall into the recess of the second semi-finished product.
[0018]
The corrugated cardboard of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention. That is, the corrugated paper according to the present invention exhibits its effect by providing a flat portion on one corrugated sheet to form a rectangular wave shape and appropriately setting the dimensions.
[0019]
【The invention's effect】
As described above, according to the corrugated paper according to the present invention, even if the phase of the corrugated sheet is slightly shifted, the top of at least one corrugated sheet is a flat plate having a predetermined width. It is securely in contact with the top of the shape and bonded. For this reason, there is no need to arrange a phase matching device in the corrugated paper manufacturing apparatus, and since the top of the corrugated sheet is flat, the convex portion of the corrugated sheet becomes trapezoidal, and the cushioning property is improved. .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a corrugated cardboard according to the present invention.
FIG. 2 is a cross-sectional view showing a second embodiment of the corrugated paper according to the present invention.
FIG. 3 is a cross-sectional view showing a third embodiment of the corrugated cardboard according to the present invention.
FIG. 4 is a sectional view showing a fourth embodiment of the corrugated paper according to the present invention.
FIG. 5 is a schematic view showing an apparatus for producing a semi-finished product of corrugated cardboard according to the embodiment.
FIG. 6 is a schematic view showing an apparatus for producing corrugated paper according to an embodiment.
FIG. 7 is a cross-sectional view showing a conventional corrugated cardboard.
FIG. 8 is a diagram showing a conventional corrugated paper board manufacturing apparatus.
[Explanation of symbols]
20 Sheet manufacturing apparatus 21 Toothed drum 22 Tooth 23 Toothed drum 24 Tooth 25 Adhesive application drum 50 Adhesive machine 51 Glue application machine 52 Phase matching mechanism 53 One side gear 54 Pressing roller 55 Other side gear 56 Pressing roller 60 Joining mechanism 61 Belt conveyor 62 Roller 70 Cutting machine 71 Conveying roller F Flat sheet Fa Flat sheet Fb Flat sheet P Flat part S Corrugated paper S1 Corrugated paper S2 Corrugated paper S3 Corrugated paper S4 Corrugated paper Sa One side semi-product Sb Other side semi-product t Top T Top W Corrugated sheet Wa Corrugated sheet Wb Corrugated sheet

Claims (3)

In the corrugated paper sheet, which is formed by bonding a pair of corrugated sheets formed in a corrugated shape by bonding the tops thereof to each other and adhering a flat plate sheet to both outer sides of the bonded corrugated sheets,
Configure the top of one corrugated sheet as a flat part,
A corrugated paper, wherein the top of one corrugated sheet has a dimension Xb, the pitch of the top of the other corrugated sheet has Pa, and Xb has a dimension of Pa or more. In the corrugated paper sheet, which is formed by bonding a pair of corrugated sheets formed in a corrugated shape by bonding the tops of the corrugated sheets and a flat plate sheet on both outer sides of the bonded corrugated sheets,
  Configure the top of both corrugated sheets as a flat part,
  The corrugated paper is characterized in that the flat part dimensions of the tops of both corrugated sheets are Xa and Xb, the dimension between adjacent flat parts is Ya and Yb, respectively, and Xb is greater than or equal to Ya. 3. The corrugated cardboard according to claim 1 or 2, wherein the top of one corrugated sheet and the top of the other corrugated sheet are joined even when the corrugated sheet expands and contracts and the top phase shifts. .

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