JP5687124B2 - Bookbinding structure and paper sample book - Google Patents

Description

  The present invention relates to a book structure (bookbinding structure) and a sample book of paper samples having the bookbinding structure.

  As shown in FIG. 2, the book includes a booklet main body 104 in which a plurality of pages 102 are bound, and a cover 112 that covers the front door 106, the back 108, and the back door 110 of the booklet main body 104. Then, a structure (bookbinding structure 101) in which the booklet main body 104 and the cover 112 are integrated is adopted by joining the cover 112 to the spine 108 of the booklet main body 104 or the like.

  In such a bookbinding structure, there is a case where a performance (spreading property) for holding a page in an open state is required. For example, if the spread of a cookbook is good, you can take your hands off the cookbook and cook while browsing the contents of a specific page, and if the spread of a catalog or textbook is good, This is convenient because you can take notes while browsing the contents of a specific page by removing your hands from catalogs and textbooks. The spreadability is a characteristic particularly required for a thick book in which a large number of pages are bound, or a book (for example, a photo book) in which pages are made of relatively thick paper or highly rigid paper.

  As one of bookbinding structures with good spreadability, a bookbinding structure called open back bookbinding (sometimes referred to as “followback bookbinding”) is known (see Patent Documents 1 to 3).

  The open back bookbinding is a booklet main body 4 in which a plurality of pages 2 are bound, and a cover that covers the front door 6, the back 8 and the back door 10 of the booklet main body 4, like a bookbinding structure 201 shown in FIGS. 12, and the front cover 14 and the back cover 18 are joined to portions other than the back 8 (the front door 6, the back door 8, etc.) of the booklet main body 4, and the back cover is attached to the back 8 of the booklet main body 4. The bookbinding structure 16 is not joined. As shown in FIG. 3B, such a bookbinding structure has excellent spreadability because the back 8 of the booklet body 4 is lifted away from the spine 16 when the page 2 is opened.

  Moreover, in order to improve spreadability, as an adhesive for binding the back portion of a plurality of pages, a relatively flexible adhesive (ethylene-vinyl acetate copolymer (EVA) adhesive, polyurethane (PUR ) -Based adhesives) have also been proposed (see Patent Documents 4 and 5). By using a flexible adhesive, the back of the booklet body is easily bent. Accordingly, it is possible to expect an improvement in spreadability.

JP-A-7-137479 Japanese Patent Laid-Open No. 10-329447 JP 2001-26186 A JP-A-11-170727 JP 2004-188863 A

  However, the conventional bookbinding structure has a problem that even if the techniques described in Patent Documents 1 to 5 are adopted, sufficient spreadability is not yet obtained. In particular, there is a problem that the spreadability of the pages near the front and back doors of the booklet body is insufficient.

  Above all, the above-mentioned problem has occurred remarkably in a paper sample book. A sample book of paper samples has a bookbinding structure in which various types of sample papers are bound, and the paper samples include thick paper and highly rigid paper. In addition, according to practice, the arrangement order of the samples is determined to some extent, and there are cases where thick paper or highly rigid paper must be arranged on the front and back doors of the booklet body. Therefore, there is a problem that due to its structure, it is difficult to ensure spreadability, particularly when the page 2 close to the front door 6 and the back door 10 of the booklet body 4 is opened as shown in FIG. 3C.

  In addition, the sample book of the paper sample is used such as taking a memo while browsing the contents of the sample on a specific page and comparing with other samples by releasing the hand from the sample book. Therefore, there is also a situation that higher spreadability is required as compared with other books. The same situation applies to catalogs and textbooks.

  As described above, a bookbinding structure having sufficient spreadability, in particular, a bookbinding structure excellent in page spreadability near the front door and back door of the booklet main body has not yet been disclosed. That is, there is a strong demand for a bookbinding structure that has sufficient spreadability and that is particularly excellent in page spreadability near the front and back doors of the booklet body.

  The present invention has been made in view of such problems of the prior art. Specifically, the present invention provides a bookbinding structure and a paper sample book that have sufficient spreadability, and in particular, have excellent page spreadability near the front door and back door of the booklet body.

  As a result of intensive studies to solve the problems of the prior art as described above, the inventor has a plurality of concave grooves along the top-and-bottom direction of the booklet body on at least one of the front cover, the back cover, and the back cover. The present invention was completed by conceiving that the above-mentioned problems can be solved by forming. Specifically, according to the present invention, the following bookbinding structure and paper sample book are provided.

[1] A booklet main body in which a plurality of pages are bound, and a cover that covers a front door, a back, and a back door of the booklet main body, and the cover covers the front door of the booklet main body, It consists of a back cover that covers the spine of the booklet main body and a back cover that covers the back door of the booklet main body, and the cover is joined to the booklet main body and is at least one of the front cover, the spine cover, and the back cover. And a bookbinding structure in which at least three concave grooves are formed along the top-to-bottom direction of the booklet main body , and a range of a width of 15 mm from a boundary line to the spine cover of the front cover, and / or Alternatively, a bookbinding structure in which at least three concave grooves are formed in a range of a width of 15 mm from a boundary line with the back cover of the back cover .

[ 2 ] The front cover is joined to the front door of the booklet body by a first joint portion, the back cover is joined to the back door of the booklet body by a second joint portion, and the back cover is A portion that is not joined to the spine of the booklet main body and that is joined to the front door of the booklet main body by the boundary line with the spine cover of the front cover and the first joint portion; A plurality of concave grooves are formed in the region between the top and bottom of the booklet main body, and the booklet main body is formed by the boundary line between the back cover and the back cover of the back cover and the second joint portion. The bookbinding structure according to [1 ], wherein a plurality of concave grooves are formed along a top-and-bottom direction of the booklet main body in a region between the back door and a portion joined to the back door.

[3] the booklet body, bookbinding structure according to [2] a page basis weight 50 to 500 g / ^{m 2} are those containing at least one.

[ 4 ] A sample book of paper samples having the bookbinding structure according to any one of [1] to [ 3 ], wherein the booklet main body is formed by binding a plurality of paper samples.

[ 5 ] The spine is bonded to the spine of the booklet body, and the spine and the spine of the booklet main body are bonded by an adhesive layer formed of a polyurethane-based adhesive, The bookbinding structure according to [1 ], wherein the concave groove is formed by debossing.

[ 6 ] A plurality of concave grooves are formed along the vertical direction of the booklet main body in a region adjacent to a boundary line with the spine cover of the front cover, and the spine of the back cover includes the spine. The bookbinding structure according to [ 5 ], wherein a plurality of concave grooves are formed in a region adjacent to the boundary line with the cover along the vertical direction of the booklet main body.

[ 7 ] The bookbinding structure according to [ 6 ], wherein a plurality of concave grooves are formed in the spine along the vertical direction of the booklet body.

  The bookbinding structure and the sample book of the paper sample of the present invention have sufficient spreadability, and are particularly excellent in page spreadability near the front door and back door of the booklet body.

It is a schematic perspective view which shows typically one Embodiment of the bookbinding structure of this invention. FIG. 1B is a schematic bottom view schematically showing the bookbinding structure shown in FIG. 1A. FIG. 1B is a schematic bottom view schematically showing a state in which a page near the center of the bookbinding structure shown in FIG. 1A is opened. FIG. 1B is a schematic bottom view schematically showing a state in which a page near the cover of the bookbinding structure shown in FIG. 1A is opened. It is a schematic bottom view which shows typically one embodiment of the conventional bookbinding structure. It is a schematic bottom view which shows typically another embodiment of the conventional bookbinding structure. FIG. 3B is a schematic bottom view schematically showing a state in which a page near the center of the bookbinding structure shown in FIG. 3A is opened. FIG. 3B is a schematic bottom view schematically showing a state in which a page near the cover of the bookbinding structure shown in FIG. 3A is opened. It is a schematic perspective view which shows typically another embodiment of the bookbinding structure of this invention. FIG. 4B is a schematic bottom view schematically showing the bookbinding structure shown in FIG. 4A. FIG. 4B is a schematic bottom view schematically showing a state in which a page near the center of the bookbinding structure shown in FIG. 4A is opened. FIG. 4B is a schematic bottom view schematically showing a state in which a page near the cover of the bookbinding structure shown in FIG. 4A is opened.

  Hereinafter, the form for implementing this invention is demonstrated concretely. However, the present invention includes all inventions having the specific matters. That is, it is not limited only to the following embodiments.

[1] Features of the present invention:
In the present invention, as shown in FIG. 1B, bookbinding in which a plurality of concave grooves 26 and 30 are formed in at least one of the front cover 14, the back cover 16, and the back cover 18 along the vertical direction of the booklet body 4. Structure 1.

  Such a structure improves the flexibility of the cover 12 because a plurality of the concave grooves 26 and 30 functioning as folds are formed. Therefore, it has sufficient spreadability. Further, the shape followability of the cover 12 with respect to the shape change of the booklet body 4 when the page 2 is opened is improved. That is, the manner in which the plurality of grooves 26 and 30 are folded changes so as to correspond to the position of the opened page 2, and the distortion generated between the front cover 14, the back cover 16 and the back cover 18 is alleviated. Therefore, not only when the page 2 near the center is opened as shown in FIG. 1C, but also when the page 2 near the cover 12 is opened as shown in FIG. That is, the spreadability of the page 2 close to the front door 6 and the back door 10 of the booklet body 4, which is difficult to ensure the spreadability in the conventional structure, is excellent.

[2] Configuration of the present invention:
The configuration of the present invention will be described below. The bookbinding structure of the present invention is a bookbinding structure having booklet bodies 4 and 104 and covers 12 and 112, such as the bookbinding structure 1 shown in FIGS. 1A to 1D or the bookbinding structure 301 shown in FIGS. 4A to 4D.

[2-1] Booklet body:
The “booklet main body” is a part of the book and refers to a paper bundle in which a plurality of pages are bound (sometimes referred to as “text”). In the present specification, among the plurality of pages constituting the booklet body, the first page is “front door” (reference numerals “6” and “106” in the figure), and the last page is “back door” (reference numeral “ 10 ”,“ 110 ”). Further, the end of the booklet body on which the page is bound is referred to as “back” (reference numerals “8” and “108” in the figure).

  In the present invention, there is no particular limitation on how to bind the pages of the booklet body. However, it is preferable to use a binding method in which a plurality of pages are stacked and the ends thereof are fixed with an adhesive. Examples of such a binding method include simple binding and white binding. However, it is not always necessary to bind only with an adhesive. A wire or a thread may be used in combination.

  There is no limitation in particular about the kind of adhesive agent. However, it is preferable to use a relatively flexible adhesive (ethylene-vinyl acetate copolymer (EVA) adhesive, polyurethane (PUR) adhesive, etc.). By using a flexible adhesive, the back of the booklet body is easily bent. Accordingly, it is possible to expect an improvement in spreadability. Examples of the form of the adhesive include a solvent type, an emulsion type, and a hot melt type. Among these, it is preferable to use a hot melt adhesive. When the hot melt adhesive is used, it is not necessary to dry the solvent or the dispersion medium, and the operation of binding pages can be performed quickly and easily.

  The adhesive coating thickness (adhesive layer thickness) may be appropriately set according to the type and thickness of the paper constituting the page, the number of pages, and the type of adhesive. For example, in the case of an EVA adhesive, the coating thickness is preferably 0.7 to 1.5 mm. By setting it as 0.7 mm or more, the strength and durability required for the booklet body can be imparted. By setting the thickness to 1.5 mm or less, it is possible to prevent the adhesive layer from having excessively high rigidity and a decrease in page spread. In order to obtain the effect more reliably, the coating thickness is more preferably 0.9 mm or more, and further preferably 1.2 mm or less.

  The number of pages in the booklet body varies depending on the type of book. However, the present invention is particularly effective when the number of pages of the booklet body is large. Specifically, the number of pages of the booklet body is preferably 50 to 600 pages. When the booklet main body has 50 pages or more, the problem of spreadability often occurs, so there is an advantage of adopting the configuration of the present invention. On the other hand, the effect of this invention can be exhibited reliably by setting it as 600 pages or less. In order to obtain the effect more reliably, the number of pages of the booklet body is more preferably 100 pages or more, and further preferably 400 pages or less.

  There are no particular restrictions on the types of paper that make up the page. Paper generally used for bookbinding, for example, high-quality paper, coated paper, art paper, recycled paper, and the like can be used.

There is no restriction | limiting in particular about the basic weight of the paper which comprises a page. However, the present invention is particularly effective when the basis weight of the paper constituting the page is large. Specifically, the basis weight is preferably 50 to 500 g / m ² . When it becomes 50 g / m ² or more, the problem of spreadability often occurs, so there is an advantage of adopting the configuration of the present invention. On the other hand, the effect of this invention can be exhibited reliably by setting it as 500 g / m < ² > or less. In order to obtain the effect more reliably, the basis weight is more preferably 80 g / m ² or more, and further preferably 300 g / m ² or less.

There is no particular limitation on the stiffness of the paper constituting the page. However, the present invention is particularly effective when the paper constituting the page has high rigidity. Specifically, it is preferable in the lateral stiffness is 20~250cm ^3/100. When a 20 cm ^3/100 or more, it becomes often spread of problems arise, there is a benefit of adopting the configuration of the present invention. On the other hand, the effect of this invention can be reliably exhibited by setting it as 250 cm < ³ > / 100 or less. The spreadability is greatly influenced by the rigidity in the lateral direction of the paper constituting the page. Therefore, there is no particular limitation on the rigidity in the vertical direction. However, the rigidity in the longitudinal direction is preferably ³⁰ to 450 cm 3/100.

  “Stiffness” is an index for evaluating the rigidity of a paper (the strength of how much it does not bend against the force to bend) (sometimes called “stiffness” or “stiffness”). .) In this specification, the Clark stiffness measured according to JIS P-8143 is defined as “rigidity”.

  The size of the booklet body may be appropriately determined according to the purpose. For example, A6 to A4 size (length 148 to 297 mm, width 105 to 210 mm), B6 to B4 size (length 182 to 364 mm, width 128 to 257 mm) can be used. The thing of the deformation | transformation size which does not correspond to these may be sufficient.

  Moreover, there is no restriction | limiting in particular also about the back width | variety of a booklet main body. However, the present invention is particularly effective when the booklet body is wide (in the case of thick books). Specifically, the back width of the booklet body is preferably 2 to 60 mm. When it becomes 2 mm or more, a problem of spreadability often occurs, so there is an advantage of adopting the configuration of the present invention. On the other hand, the effect of this invention can be exhibited reliably by setting it as 60 mm or less. In order to obtain the effect more reliably, the back width of the booklet body is more preferably 7 mm or more, and further preferably 40 mm or less.

[2-2] Cover:
A “cover” is a member that covers the front door, back, and back door of the booklet body. In the present specification, the portion of the cover that covers the front door of the booklet body is “cover cover” (reference numerals “14” and “114” in the figure), and the portion that covers the back of the booklet body is “back cover” (in the figure). The portions covering the back door of the booklet body are referred to as “back cover” (reference symbols “18” and “118” in the figure).

  There are no particular restrictions on the type of paper that forms the cover. For example, paperboard, cardboard, coated paper or the like can be used.

  The cover is slightly larger than the paper that forms the pages of the booklet body. Specifically, it is preferable to use paper having a size one size (1 to 5 mm) larger than the size of the booklet main body as the cover.

In addition, the cover is thicker than the paper constituting the pages of the booklet body. Therefore, it is preferable to use paper having a basis weight of 100 to 310 g / m ² as the cover. When it becomes 100 g / m ² or more, the problem of spreadability often occurs, so there is an advantage of adopting the configuration of the present invention. On the other hand, the effect of this invention can be reliably exhibited by setting it as 310 g / m < ² > or less. To achieve the above effects more reliably, more preferably to the basis weight and 157 g / ^{m 2} or more and more preferably be 256 g / ^{m 2} or less.

[2-3] Bookbinding structure:
In the bookbinding structure of the present invention, the cover sheets 12 and 112 are joined to the booklet body 4 and 104 as in the bookbinding structure 1 shown in FIG. 1B or the bookbinding structure 301 shown in FIG. 4B. There is no restriction | limiting in particular about the aspect of joining. However, like the method of binding the back of the booklet main body, it is preferable to join the cover and the booklet main body with an adhesive layer formed of an adhesive.

  The type of adhesive that joins the cover and booklet is the same as that used when binding the back of the booklet (ethylene-vinyl acetate copolymer (EVA) adhesive, polyurethane (PUR)) It is preferable to use a hot melt adhesive.

  It is preferable that the coating thickness of the adhesive (the thickness of the adhesive layer) in the first joint portion 20 and the second joint portion 22 is 1 to 2.5 mm. By setting the thickness to 1 mm or more, the bonding strength between the cover and the booklet body can be ensured. By setting the thickness to 2.5 mm or less, it is possible to prevent the adhesive layer from having excessively high rigidity and a decrease in page spread. In order to obtain the effect more reliably, the coating thickness is more preferably 1.3 mm or more, and further preferably 1.8 mm or less.

[2-4] Concave groove:
In the bookbinding structure of the present invention, as in the bookbinding structure 1 shown in FIG. 1B or the bookbinding structure 301 shown in FIG. 4B, a booklet is provided on at least one of the front cover 14, 114, the back cover 16, 116, and the back cover 18, 118. A plurality of concave grooves 26, 30, 126, 130, 132 are formed along the vertical direction of the main bodies 4, 104.

  The “concave groove” is a narrow concave portion formed on the cover. Since it is usually formed by pressing, it is also referred to as “pressed rule”. The formation method of a ditch | groove is not specifically limited. For example, it can be formed by debossing described later.

  The width of the groove is preferably 0.1 to 1 mm. By setting the thickness to 0.1 mm or more, the groove portion can be easily bent and can function as a fold. By setting it to 1 mm or less, it is possible to obtain an effect that a large number of concave grooves can be formed with a constant width. In order to obtain the effect more reliably, the width of the groove is more preferably 0.3 mm or more, and further preferably 0.5 mm or less.

  The depth of the groove is preferably 0.05 to 0.5 mm. By setting the thickness to 0.05 mm or more, the flexibility of the recessed groove portion can be improved, and it can function as a fold. By setting the thickness to 0.5 mm or less, it is possible to obtain an effect that the strength of the concave groove portion can be prevented from being lowered. In order to obtain the above effect more reliably, the depth of the groove is more preferably 0.1 mm or more, and further preferably 0.3 mm or less.

  The concave groove is formed in at least one of a front cover, a back cover, and a back cover. That is, it should just be formed in any one of a front cover, a back cover, and a back cover. More specifically, the groove may be formed only on the spine, or the grooves 26 and 30 are formed only on the front cover 14 and the back cover 18 as in the bookbinding structure 1 shown in FIG. 1B. Alternatively, as in the bookbinding structure 301 shown in FIG. 4B, concave grooves 126, 130, and 132 may be formed in all of the front cover 114, the back cover 116, and the back cover 118.

  The concave groove may be formed in any part of each of the front cover, the back cover, and the back cover. However, it is preferable to form a concave groove in a region of the front cover adjacent to the boundary line with the spine and / or a region of the back cover adjacent to the boundary line with the spine. By forming a concave groove in the area near the boundary with the spine, these areas are deformed when the page is opened. Therefore, the cover is also deformed following the shape deformation of the booklet body, and better spreadability is exhibited.

The “region adjacent to the boundary line with the back cover” means a region close to the back cover when it is assumed that the front cover or the back cover is divided into two equal parts in the width direction. In the present invention, among the front cover, out of range and / or back cover of 15mm wide from the boundary line between the back cover, that form a groove from the boundary line between the back cover in the range of 15mm wide. By forming in this range, a sufficient number of concave grooves can be formed.

  The concave groove is formed along the vertical direction of the booklet body. The “vertical direction” means a direction from the upper end to the lower end of the cover. The position of the end of the groove is not particularly limited. However, like the bookbinding structure 1 shown in FIG. 1A or the bookbinding structure 301 shown in FIG. 4A, it is preferably formed from the upper end to the lower end of the cover sheets 12 and 112. By forming the concave groove from the upper end to the lower end of the cover, the concave groove easily functions as a fold, and the effect of the present invention is easily exhibited.

A plurality of concave grooves are formed. “Plural” means at least two. In the present invention, the front cover, at least one spine and back cover, along the vertical direction of the booklet body that has at least three grooves are formed. When there is one concave groove, the function of forming a crease at an appropriate position cannot be exhibited. By forming at least two concave grooves, a function of forming a fold at an appropriate position can be exhibited.

Note that, depending on the width, depth, interval, and the like of the groove, the two grooves may be integrated to function as one groove. Therefore, in order to more reliably exhibit the above effect, form at least three grooves. The upper limit of the number of grooves is not particularly limited. However, it is preferably 20 or less.

  “Multiple” means that when a front cover is divided into a front cover, a spine cover, and a back cover, a plurality of covers are formed in the divided one area. That is, it does not mean that one groove is formed on each of the front cover, the back cover, and the back cover, and the total of these is a plurality. For example, a plurality of concave grooves 26 and 30 are formed on each of the front cover 14 and the back cover 18 as in the bookbinding structure 1 shown in FIG. 4B, and a configuration in which a plurality of concave grooves 126, 130, and 132 are formed on each of the front cover 114, the back cover 116, and the back cover 118, and the like.

  The interval between the plurality of concave grooves is preferably 0.3 to 1.5 mm. By setting it to 0.3 mm or more, it becomes possible to function as a plurality of folds. By setting it to 1.5 mm or less, a function of forming a crease at an appropriate position can be exhibited. In order to obtain the above effect more reliably, the interval between the grooves is more preferably 0.5 mm or more, and further preferably 1 mm or less.

  It is not necessary that the intervals between the plurality of grooves are all equal. However, it is preferable to form a plurality of concave grooves at equal intervals.

[3] First embodiment:
1st Embodiment of this invention is a form which applied the bookbinding structure of this invention to what is called an open back bookbinding like the bookbinding structure 1 shown to FIG. 1A-FIG. 1D.

[3-1] Open back bookbinding:
“Open back bookbinding” means that the front cover 14 is joined to the front door 6 of the booklet body 4 and the back cover 18 is joined to the back door 10 of the booklet body 4 as in the bookbinding structure 1 shown in FIG. 1B. This is a bookbinding structure in which the cover 16 is not joined to the back 8 of the booklet body 4. In the bookbinding structure 1 shown in FIG. 1B, the front cover 14 and the front door 6 are joined by the first joint portion 20, and the back cover 18 and the back door 10 are joined by the second joint portion 22.

  As long as the first embodiment is open back bookbinding, other configurations of the bookbinding structure are not particularly limited. For example, round bookbinding or square bookbinding, hard cover bookbinding (upper bookbinding), or soft cover bookbinding (normal bookbinding) may be used.

[3-2] Concave groove:
In the first embodiment, a region between the boundary line of the front cover 14 with the spine cover 16 and the portion joined to the front door 6 of the booklet body 4 by the first joint portion 20, or the back In the cover 18, grooves 26 and 30 are formed in a region between a boundary line with the spine cover 16 and a portion joined to the back door 10 of the booklet body 4 by the second joining portion 22. It is preferable.

  In the first embodiment, the effect of the present invention cannot be obtained even if a concave groove is formed only on the front fore edge side of the first joint portion 20 and the second joint portion 22. However, after forming a groove in the region, a groove may be further formed on the front fore edge side of the first joint or the second joint.

[3-3] Booklet body:
As described above, the present invention is particularly effective when the page is composed of a relatively thick paper having a large basis weight. In the first embodiment, the booklet body preferably includes at least one page having a basis weight of 100 to 300 g / m ² .

As a booklet main body containing at least one page having a basis weight of 50 to 500 g / m ² , a sample book of paper samples can be cited. The “paper sample book” is a book body formed by binding a plurality of paper samples. In other words, it is a bookbinding structure in which each of the pages constituting the booklet body is a paper sample.

[4] Second embodiment:
In the second embodiment of the present invention, the bookbinding structure of the present invention is applied to non-open back bookbinding.

[4-1] Non-open back bookbinding:
“Non-open back bookbinding” means a bookbinding structure in which the back cover is joined to the back of the booklet body. For example, in the bookbinding structure 301 shown in FIG. 4B, the spine 116 is bonded to the spine 108 of the booklet body 104.

  As long as the second embodiment is non-open back bookbinding, the other configurations of the bookbinding structure are not particularly limited. For example, a flexible bag or a tight bag may be used. Further, round bookbinding or square bookbinding may be used, and hard cover bookbinding (upper bookbinding) or soft cover bookbinding (normal bookbinding) may be used.

  In the bookbinding structure 301 shown in FIGS. 4A to 4D, the spine 116 and the spine 108 are joined by an adhesive layer 132. In the second embodiment, it is preferable that the spine and the back of the booklet main body are joined by an adhesive layer formed of a polyurethane-based adhesive.

  Polyurethane (PUR) adhesives have higher adhesive strength than ethylene-vinyl acetate copolymer (EVA) adhesives, and the stretch rate / flexibility / durability of the formed adhesive layer It is characterized by high nature. Therefore, the thickness of the adhesive layer can be reduced, and the spreadability of the bookbinding structure can be improved. In particular, when a PUR-based hot melt adhesive is used, the operation of joining the spine and the back of the booklet body can be performed quickly and easily.

  The coating thickness of the adhesive (the thickness of the adhesive layer) is preferably 0.3 to 1 mm. By setting it to 0.3 mm or more, the bonding strength between the cover and the booklet body can be ensured. Moreover, if it is a PUR type | system | group adhesive agent with high adhesive strength, the thickness of an adhesive bond layer can be 1 mm or less, and a spread property can be improved. In order to obtain the effect more reliably, the coating thickness is more preferably 0.4 mm or more, and further preferably 0.7 mm or less.

  In the second embodiment, it is preferable that the groove is formed by debossing. Embossing is a processing method in which a convex pattern is pressed from the back side of the workpiece, and the convex pattern is raised on the surface side of the workpiece. On the other hand, debossing is a processing method in which a convex pattern is pressed from the surface side of the workpiece and a concave pattern is formed on the surface side of the workpiece. Debossing can form a large number of narrow grooves in a narrow area. Therefore, it is suitable for forming a concave groove in the bookbinding structure of the present invention.

  In the second embodiment, as shown in FIGS. 4A to 4D, a plurality of concave grooves along the top-and-bottom direction of the booklet main body 104 in the area adjacent to the boundary line with the spine cover 116 of the front cover 114. 126 is formed, and a plurality of concave grooves 130 are preferably formed along the top-and-bottom direction of the booklet main body 104 in a region of the back cover 118 adjacent to the boundary line with the spine 116. By forming a plurality of concave grooves on both sides of the spine 116 as described above, the front cover 114 and the back cover 118 can be sufficiently opened, and the spreadability can be improved.

  Further, in the second embodiment, as shown in FIGS. 4A to 4D, it is preferable that a plurality of concave grooves 132 are formed on the spine cover 116 along the vertical direction of the booklet main body 104. Such a form is preferable because flexibility can be given to the spine 116 and the spreadability can be improved even in a non-open back bookbinding structure in which the spine and the back of the booklet body are directly joined. . In particular, when the spine and the back of the booklet body are joined by an adhesive layer formed of a PUR adhesive, the flexibility of the adhesive layer and the flexibility of the spine cover combine to further increase the Since the spreadability can be improved, it is preferable.

  The bookbinding structure of the present invention will be described more specifically with reference to the drawings. However, the bookbinding structure of the present invention includes all bookbinding structures provided with the invention-specific matters, and is not limited to the following examples.

[Example 1]
As the bookbinding structure of Example 1, a paper sample book was manufactured. The specific structure is the structure of the bookbinding structure 1 shown in FIGS. 1A to 1D. That is, an open back bookbinding having a booklet body 4 and a cover 12 was obtained.

[1] Booklet body:
Various paper samples were included as the paper composing page 2. Specifically, cast coated paper, embossed paper, and art paper were included.

The basis weight of the paper constituting Page 2 is the smallest, embossed paper with a basis weight of 84.9 g / m ² (trade name: OK embossed satin, paper thickness: 86 μm, manufactured by Oji Paper Co., Ltd.), and the largest one. Cast coated paper with a basis weight of 256.0 g / m ² (trade name: mirror coat platinum, paper thickness: 271 μm, manufactured by Oji Paper Co., Ltd.) and art paper with a basis weight of 256.0 g / m ² (trade name: OK) Ultra Aqua Satin, paper thickness: 267 μm, manufactured by Oji Paper Co., Ltd.).

The lateral stiffness of the embossed paper is 30 cm ^3/100, longitudinal stiffness was 70cm ^3/100. Lateral stiffness of the cast-coated paper 180cm ^3/100, longitudinal stiffness was 350 cm ^3/100. Lateral stiffness of the art paper 180cm ^3/100, longitudinal stiffness was 400 cm ^3/100.

  The binding method of page 2 of the booklet main body 4 was wireless binding, and no wire or thread was used together. As the adhesive, a polyurethane (PUR) adhesive (trade name: Hibon 4853, manufactured by Hitachi Chemical Co., Ltd.) was used. The coating thickness of the adhesive (the thickness of the adhesive layer 32) was 0.5 mm.

  The number of pages of the booklet body 4 was 180 pages. Further, the size of the booklet body 4 was 100 mm long, 200 mm wide, and 13 mm wide.

[2] Cover:
The paper constituting the cover 12 was an art post (trade name: OK special art post +, basis weight: 209.3 g / m ² , paper thickness: 189 μm, manufactured by Oji Paper Co., Ltd.). The cover 12 is the same size as the paper constituting the page 2 of the booklet body 4.

[3] Bookbinding structure:
The cover 12 was joined to the booklet body 4. For joining, the cover 12 and the booklet body 4 were joined by an adhesive layer (first joint 20 and second joint 22) formed of an adhesive. As the adhesive, an ethylene-vinyl acetate copolymer (EVA) adhesive (trade name: NITITE H6861B, manufactured by Nitta Gelatin Co., Ltd.) was used.

  The first joint portion 20 and the second joint portion 22 were formed on the front edge side by 7 mm from the boundary line with the spine cover 16. The width of the 1st junction part 20 and the 2nd junction part 22 was 4 mm, and the coating thickness (thickness of the 1st junction part 20 and the 2nd junction part 22) of the adhesive agent was 1.5 mm.

[4] Concave groove:
A region of the front cover 14 adjacent to the boundary line with the spine cover 16, more specifically, the boundary line with the spine cover 16 of the cover cover 14 and the front surface of the booklet body 4 by the first joint portion 20. Nine concave grooves 26 were formed in a region between the portion joined to the door 6.

  Further, the booklet body 4 is defined by the area adjacent to the boundary line with the spine cover 16 in the back cover 18, more specifically, the boundary line with the spine cover 16 in the back cover 18 and the second joint portion 22. Ten concave grooves 30 were formed in a region between the portion bonded to the back door 10 of the first door.

  The concave grooves 26 and 30 were formed by debossing. The concave grooves 26 and 30 were formed with a width of 0.3 mm and a depth of 0.2 mm. The intervals between the plurality of concave grooves 26 and 30 were all 0.6 mm. The concave grooves 26 and 30 were formed from the upper end to the lower end of the cover 12 along the top-bottom direction of the booklet body 4.

  The present invention can be used as a bookbinding structure for various books. In particular, it is suitable for use as a structure of a sample book of paper samples.

1: bookbinding structure, 2: page, 4: booklet body, 6: front door, 8: back, 10: back door, 12: front cover, 14: front cover, 16: back cover, 18: back cover, 20: first 1 joint part, 22: second joint part, 24: region, 26: concave groove, 28: region, 30: concave groove, 32: adhesive layer, 34: reinforcing material, 36: space, 101: bookbinding structure, 102 : Page, 104: Booklet body, 106: Front door, 1088: Back, 110: Back door, 112: Cover, 114: Front cover, 116: Back cover, 118: Back cover, 126: Groove, 130: Groove 132: Adhesive layer, 138: Concave groove, 201: Bookbinding structure, 301: Bookbinding structure.

Claims (7)

A booklet main body in which a plurality of pages are bound, and a cover that covers the front door, the back and the back door of the booklet main body,
The cover is composed of a cover that covers the front door of the booklet main body, a back cover that covers the spine of the booklet main body, and a back cover that covers the back door of the booklet main body,
The cover is joined to the booklet body,
At least one of the front cover, the back cover, and the back cover has a bookbinding structure in which at least three concave grooves are formed along the vertical direction of the booklet body ,
In the front cover, at least three concave grooves are formed in a range of 15 mm in width from the boundary with the spine and / or in the range of 15 mm in width in the back cover from the boundary with the spine. Bookbinding structure . The front cover is joined to the front door of the booklet body by the first joint portion,
The back cover is joined to the back door of the booklet body by a second joint portion,
The spine is not joined to the back of the booklet body,
Of the front cover, in the region between the boundary line with the spine and the portion joined to the front door of the booklet main body by the first joint portion, along the top-to-bottom direction of the booklet main body A plurality of concave grooves are formed,
Of the back cover, in the area between the boundary line with the spine and the portion joined to the back door of the booklet body by the second joint part, along the top-to-bottom direction of the booklet body The bookbinding structure according to claim 1, wherein a plurality of concave grooves are formed. The booklet body, bookbinding structure of claim 2, page basis weight 50 to 500 g / ^{m 2} are those containing at least one. It has the bookbinding structure as described in any one of Claims 1-3 ,
A sample book of paper samples in which the booklet body is a binding of a plurality of paper samples. The spine is bonded to the back of the booklet body;
The spine and the back of the booklet body are joined by an adhesive layer formed of a polyurethane-based adhesive,
The bookbinding structure according to claim 1, wherein the concave groove is formed by debossing. Among the front cover, in the region adjacent to the boundary line with the spine cover, a plurality of concave grooves are formed along the vertical direction of the booklet body,
The bookbinding structure according to claim 5 , wherein a plurality of concave grooves are formed in a region adjacent to a boundary line with the spine cover in the back cover, along the vertical direction of the booklet main body. The bookbinding structure according to claim 6 , wherein a plurality of concave grooves are formed in the spine along the top-and-bottom direction of the booklet main body.

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