JP2004167901A - Cover for bookbinding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a cover for bookbinding which facilitates formation of a shelfback and makes the corner parts of the shelfback very strong. <P>SOLUTION: The cover to be used for an album is constituted by forming the shelfback 15 having a U-shaped cross section between front and back covers composed of cover paper, cover core paper and end paper so that it is integrated with these covers. Core paper 12 for the shelfback is adhered to the central part of the cover paper 1 by using a mixed agent prepared by mixing a resin adhesive with starch paste, and one more sheet of the core paper 12 is adhered at need. The paper 1 and the core paper 12 are heat-molded by a mold and thereby the shelfback 15 composed of the paper 1 and the core paper 12 and having the U-shaped cross section is formed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bookbinding cover used for an album, a book, and the like.
[0002]
[Prior art]
BACKGROUND ART As a cover used for an album, that is, a cover for album binding, a back cover having a U-shaped cross section (including a U-shape) is integrally formed between a front cover and a back cover. The cover used for this album is conventionally made as shown in FIGS.
[0003]
First, front and back cover core sheets (thick paper, for example, 2 mm thick) 2 and 3 are arranged at the left and right positions of the cover sheet 1, and the center core sheet 4 a and the outer core sheets 4 b and 4 b (medium) are disposed at the center of the cover sheet 1. Thick paper (for example, 0.5 mm thick) is arranged with a small gap therebetween, and they are adhered using starch glue, and the folded part 1a of the peripheral edge protruding from the core paper of the cover paper 1 is formed of the core paper. Wrap the edges and fold them inward to adhere to the core paper.
[0004]
Next, the inner cover 7A is adhered to the spine core papers 4b, 4a, and 4b so as to hide the spine cover papers. Then, the core paper 4a and the outer core papers 4b, 4b on both sides are assembled in a U-shaped cross section by using a staple or a nail screw (not shown), and the paper 1 and the core paper 4a, A spine 6 having a U-shaped cross section is formed.
[0005]
Thereafter, the U-shaped spine 6 is inserted and held in a plate-shaped notch (not shown), and the spine 2 and 3 are opened flat on both sides of the spine cores 4b and 4b. In this state, if the facing 7 is attached to each of the cover core papers 2 and 3 with a double-sided tape, the front and back surfaces of the cover paper 1 and the core papers 2 and 3 and the facings 7 and 7 are provided at the left and right positions of the spine 6. The covers 8 and 9 are formed, and the cover for album binding, that is, the cover 10 of the album is obtained.
[0006]
Since there is no core paper between the front and back covers 8 and 9 and the spine 6, the concave open groove 11 is automatically formed.
[0007]
[Problems to be solved by the invention]
As is apparent from the above description, in the cover 10 used for the conventional album, the three backstrip core papers 4a, 4b, 4b glued to the cover paper 1 to form the spine 6 are stapled. It is necessary to stop and assemble it into a U-shaped cross section, and there is a problem that it takes a lot of trouble and cost to form the spine 6.
[0008]
As shown in FIG. 8, the corners of the spine 6 have a low strength because the gap between the core paper 4a and the outer core paper 4b is merely connected by the cover paper 1, and the corners of the spine 6 are easy to form. There was also a problem that it became durable, crushed, or worn, and could not withstand long-term use.
[0009]
Such a problem similarly occurs in a cover of a type in which only one spine core paper is used at the back of a U-shaped spine.
[0010]
The above problems also occur in various bookbinding covers such as hardcover books and sketchbooks.
[0011]
Therefore, an object of the present invention is to provide a bookbinding cover in which the spine can be easily formed and the corners of the spine have high strength.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a U-shaped cross section comprising the cover paper and the back cover core between a front cover and a back cover each comprising a cover paper, a cover core, and a facing. Bookbinding cover with the spine of
The spine core paper is bonded to the cover paper between the front and back cover core sheets using a mixed adhesive obtained by mixing a resin adhesive and starch paste, and the bonded spine core paper and The cover paper is heated and pressed by a mold to form a U-shaped cross section to form the spine.
[0013]
According to the bookbinding cover of the present invention, a mixed adhesive obtained by mixing a resin adhesive and a starch paste is used to adhere the cover paper and the spine core paper. High adhesiveness with the spine core paper was obtained, and good moldability of the composite in which the cover paper and the spine core paper were bonded with starch paste was obtained. It is possible to easily form a spine having a U-shaped cross section made of a core paper, and there is no great effort and cost for forming the spine. In addition, since the core paper is also included in the corners of the back cover, the strength of the corners is strong, and for example, the album using this cover may be cut, crushed, or worn out by using the cover. Can be prevented, and a highly durable one that can withstand long-term use can be obtained.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0015]
FIG. 1 is a perspective view showing one embodiment of a bookbinding cover of the present invention. In the present embodiment, a cover for album binding, that is, a cover used for an album is shown.
[0016]
The cover 10 used for this album has a basic structure similar to that of the related art, and has a U-shaped cross section between front and back covers 8 and 9 including a cover sheet 1, cover core sheets 2 and 3, and facing 17 and 17. A spine 15 (including a U-shape) is integrally formed.
[0017]
In the present invention, the spine core paper 12 is attached to the cover paper 1 using a mixed adhesive obtained by mixing a resin adhesive and starch paste, and the spine 15 is formed by heat molding using a mold.
[0018]
The present invention will be described in detail with reference to FIGS. 2 to 3 in accordance with a method of manufacturing a cover. First, similarly to FIG. 4 described above, cover core paper (thick paper, for example, 2 mm thick) is placed at the left and right positions of the cover paper 1. And a core paper for spine is disposed at the center of the cover paper 1 and these are adhered to the paper 1. In the present invention, however, as shown in FIG. (A medium thick paper, for example, 0.5 mm thick) 12 is bonded using a mixed adhesive. The core paper 12 is disposed with a small gap from the cover core papers 2 and 3. The cover core papers 2 and 3 are adhered with starch paste as in the past. The folded back portions 1a of the cover paper 1 protruding from the core papers 2, 3, 12 wrap around the ends of the core papers 2, 3, 12, respectively, and are bent inward to adhere to the core papers 2, 3, 12.
[0019]
If necessary, another one of the core papers 12 for the spine is adhered to the center of the cover paper 1 from above on the core paper 12 previously adhered using a mixed adhesive. The core paper 12 is arranged with a gap from the cover core papers 2 and 3 as described above. The backstrip core paper 12 may be only the first one, or three or more.
[0020]
The mixed adhesive is applied to one side of the core paper 12 using a roll coater or the like. The composite body 13 of the cover paper 1 and the two core papers 12 superposed and adhered thereto is formed into a U-shaped cross section using a heat molding machine as shown in FIG.
[0021]
Here, as described above, a mixed adhesive obtained by mixing a resin-based adhesive and starch paste was used for bonding the cover core paper 12. This is because a high adhesiveness between the cover paper 1 and the core paper 12 is obtained by the resin-based adhesive, and good moldability is obtained when the composite 13 is heated in a U-shaped cross section by the starch paste. In the present invention, the spine core paper 12 is bonded to the cover paper 1 by using an adhesive obtained by mixing such a resin-based adhesive and starch paste. 12, a spine having a U-shaped cross section can be formed.
[0022]
Examples of the resin adhesive include polyvinyl acetate, phenol resin, urea resin, melamine resin, polyester resin, polyurethane resin, epoxy resin, polyvinyl alcohol, polyvinyl butyral, and nitrocellulose adhesive. Agents can be used.
[0023]
The mixing ratio of the resin adhesive and the starch paste depends on the type of the resin adhesive, but is preferably about 20 to 500 parts, more preferably about 100 parts (parts by weight; the same applies hereinafter) of the starch adhesive. Is about 50 to 300 parts of the resin-based adhesive, and more preferably about 100 to 250 g of the resin-based adhesive. If the amount of the resin-based adhesive is less than 20 parts, high adhesiveness between the cover paper 1 and the core paper 12 cannot be obtained, and the spine may be peeled off during use of the album. On the other hand, when the amount of the resin-based adhesive exceeds 500 parts, the amount of the starch paste is reduced, so that it is difficult to obtain good moldability, and the cost of the mixed adhesive increases.
[0024]
The coating amount of the mixed adhesive to the spine for core paper 12, core board 1 m ² per about 10~200g well, and more preferably about 50 to 150 g. If the amount of the mixed adhesive with respect to the core paper 12 is less than 10 g / m ^2, it is too small to obtain sufficient moldability, whereas if it exceeds 150 g / m ² , it is too large and the paper 1 and the core paper 12 are too large. Slip occurs at the time of molding, and similarly good molding cannot be performed.
[0025]
In the present embodiment, a polyvinyl acetate-based adhesive (polyvinyl acetate emulsion adhesive; commercially available as a woodworking adhesive “bond”) was used, and the mixing ratio was set to 200 parts for 100 parts of starch paste. . The amount of the mixed adhesive applied to the spine core paper 12 was 100 g / m ² .
[0026]
Next, as shown in FIG. 3, an upper mold is formed on the composite 13 of the cover paper 1 and the two core papers 12 supported on the lower mold 5b of the heat molding machine with the inner spine core paper 12 facing upward. The composite 13 is sandwiched between the upper mold 5a and the lower mold 5b having a U-shaped cross section and the composite 13 is pressed and bent into a U shape. At the same time, the composite 13 is heated at about 180 to 200 ° C. for about 10 to 20 seconds, at most 30 seconds, by the heater provided in the upper mold 5a or the lower mold 5b via the upper mold 5a or the lower mold 5b. Then, the mixed adhesive between the core paper 12 and the core paper 12 is solidified, and the composite 13 is cured and formed into a U-shaped cross section. As a result, a spine 15 having a U-shaped cross section is formed at the center of the cover sheet 1 and includes the sheet 1 and the two core sheets 12. FIG. 4 shows a sectional view of the spine 15 obtained.
[0027]
Thereafter, the U-shaped spine 15 is inserted and held in a plate-shaped recess (not shown), and the cover cores 2 and 3 are flatly opened outward on both sides of the spine core 12. If the facing 17 is attached to each of the cover cores 2 and 3 with double-sided tape, the front and back covers 8 including the cover paper 1, the cores 2 and 3 and the facings 17 and 17 are provided at the left and right positions of the spine 15. 9 is formed, and a cover for album binding, that is, a cover 10 of the album is obtained. The front and back covers 8, 9 of the front cover 10 open from the concave opening groove 11 between the back cover 15 and the front cover.
[0028]
To create an album using the cover 10, for example, the following may be performed. The facing 17 is formed such that an inner edge 17a protrudes to the position of the spine 15, and a backing locking means such as a twin ring is attached to a hole (not shown) provided in the edge 17a. ing. The album is completed by attaching the mount of the album to the locking means. There are various methods for producing an album, and the method is not limited to this method.
[0029]
The cover of the present embodiment is configured as described above, uses a mixed adhesive obtained by mixing a resin adhesive and starch paste, and forms the cover paper 1 and the spine core paper 12 with the resin adhesive. A high adhesiveness was obtained, and good moldability of the composite body 13 in which the cover paper 1 and the spine core paper 12 were adhered to each other with starch paste was obtained. A spine 15 having a U-shaped cross section composed of the core paper 12 can be easily formed, and there is no great labor and cost for forming the spine. Further, since the core paper 12 is also included in the corners of the spine 15, the strength of the corners is high. Therefore, the album using the cover 10 can prevent the corners of the cover 10 from being flattened, crushed, or worn by use, and have high durability to withstand long-term use. be able to.
[0030]
In the above embodiment, the facing 17 is individually attached to the cover cores 2 and 3, but one facing is applied to the whole of the cover cores 2 and 3 and the spine core 12 therebetween. May be attached.
[0031]
Further, in the above-described embodiment, the case of a cover used for an album as a bookbinding cover has been described as an example, but the present invention is not limited to this, and may be applied to various bookbinding covers such as hardcover books and sketchbooks. Can achieve the same effect.
[0032]
【The invention's effect】
As is clear from the above description, according to the bookbinding cover of the present invention, a mixed adhesive obtained by mixing a resin-based adhesive and starch paste was used to bond the spine core paper to the cover paper. A backstrip having a U-shaped cross section composed of a cover sheet and a core sheet can be easily formed by heat molding using a mold by using one spine cover sheet for the cover sheet. There is no great labor and cost for forming. In addition, the corners of the spine have high strength and high durability.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a portion of a bookbinding cover of an album according to an embodiment of the present invention.
FIG. 2 is a plan view showing a part of a method of manufacturing the cover of FIG. 1;
FIG. 3 is a cross-sectional view showing a continuation of the manufacturing method of FIG. 2;
FIG. 4 is a sectional view showing a spine in the cover of FIG. 1;
FIG. 5 is a plan view showing a method for producing a bookbinding cover of a conventional album.
FIG. 6 is a plan view showing a continuation of the manufacturing method of FIG. 4;
FIG. 7 is a perspective view showing a bookbinding cover portion of an album manufactured by a conventional manufacturing method.
8 is a cross-sectional view of the spine in the cover of FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cover paper 2, 3 Cover core paper 5a, 5b Type 8 Front cover 9 Back cover 10 Front cover 12 Back cover core paper 13 Composite 15 Back cover 17

Claims (1)

A bookbinding cover in which a U-shaped backstrip composed of the cover paper and the backstrip core paper is integrally formed between a front cover and a back cover made of a cover sheet, a cover core sheet, and a facing sheet. ,
The spine core paper is bonded to the cover paper between the front and back cover core sheets using a mixed adhesive obtained by mixing a resin adhesive and starch paste, and the bonded spine core paper and A book cover, wherein the spine is formed by heating and pressing a cover sheet with a mold to form a U-shaped cross section.

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