JPH068670A - Back structure of binder - Google Patents

Abstract

PURPOSE:To make a binder easy to carry by forming the back part of the binder into a curved shape having an almost semicircular cross section expanding outwardly. CONSTITUTION:A front cover member 1 is formed by connecting a front cover part 2, a back part 3 and a back cover part 4 in series and a core material 6 composed of a synthetic resin plate having an almost semicircular cross section is superposed on the back part 3 to be fixed thereto and the back part 3 is curved into an almost semicircular cross-sectional shape expanding outwardly by the core material 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back structure, such as a binder, which has a semi-circular cross section and is easy to hold by hand and has a simple structure.

[0002]

2. Description of the Related Art Conventionally, in this type of binder and the like, a flat metal plate or a wooden plate is attached and fixed in many cases due to the necessity of reinforcing the back part. There are things.

[0003]

However, in such a conventional binder or the like, a separate member formed of a wooden board, a metal plate or the like is adhered to the inner or outer surface of the back or attached by eyelets or the like. Due to its complexity, production was complicated. In addition, the back surface is flat, and both edges are angular, which makes it difficult to fit in the hand when carrying it while holding it by hand. In particular, if the back has a wide width, it is extremely difficult to hold when carrying it by hand, and if several books are held together, there is a problem that they become misaligned and unstable, and they fall off. . Therefore, an object of the present invention is to solve the problems of the conventional binders and the like, and to provide a back structure of the binders and the like that is comfortable to hold in the hand and easy to hold.

[0004]

A back structure such as a binder of the present invention has a front cover part, a back part, and a back cover part connected in series to form a front cover member, and the back part has a substantially semicircular cross section. A core material made of a shaped synthetic resin plate or the like is polymerized and fixed, and the back portion is bulged outward by the core material and is curved in a substantially semicircular cross section.

[0005]

In the back structure of the binder and the like of the present invention thus constructed, the front cover member is formed in a single plate shape, and the back part is curved in a substantially semicircular section which bulges outward. This makes it very easy to fit in your hand when you are holding it, and you can carry it stably, and even if you hold several books, there will be no misalignment.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the back structure of a binder or the like of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of a binder A, 1 is a front cover member having paper or cloth attached to a corrugated cardboard core, and the front cover member 1 includes a front cover portion 2, a back portion 3, and a back cover portion 4. It is formed in a single plate shape, and grooves 5 are provided at boundaries between the front cover 2 and the back 3 and between the back 3 and the back cover 4 to facilitate opening and closing.

Reference numeral 6 is an elongated core material formed in a substantially semicircular cross section that matches the cross sectional shape of the back portion 3. The core material 6
Is molded integrally with a light synthetic resin plate such as vinyl chloride resin. Other materials may be used as long as they are lightweight and robust. The core material 6 is polymerized inside the back portion 3 so as to bulge outward, and the binder metal fitting 7 is arranged and polymerized inside the back material 3, so that the back portion 3, the core material 6, and the binder metal fitting 7 are joined together. To fix them together. A plurality of eyelet fittings 8 are used at predetermined intervals. Further, a back cover skin 10 is interposed between the inner surface of the core material 6 and the binder metal fitting 7, and both end edges thereof are attached to the base end portions of the respective front cover portions 2 and the back cover portion 4, The core material 6 is hidden to improve the appearance.

In the binder A thus constructed, the core material 6 is not exposed to the outside, and the surface of the front cover member 1 is paper, a soft vinyl sheet or cloth pasted, and has a good feel.
Moreover, since the back portion 3 is curved to have a semicircular cross section that bulges outward, it fits well in the hand as shown in the usage diagram of FIG. 3, and a sense of stability in a state of being held in the hand when being carried. It's good and you can carry it safely without any discomfort.

FIG. 4 and FIG. 5 show a file B in which a polypropylene resin sheet or the like is used as the front cover member 1. This front cover member 1 also has a front cover portion 2 and a back portion 3 in the same manner as described above. The back cover portion 4 is formed in a single plate-like manner. Then, the edge of the cover 3 is covered with a cover skin 9 extending from the front cover 2 to the back cover 4 so as to completely cover the back 3. In addition, the core material 6 is installed between the back portion 3 and the cover skin 9 so as to bulge outward.

The file B having such a structure is shown in FIG.
Since there is no need to use the eyelet fitting 8 unlike the binder A shown in FIG. 3, it is easier to manufacture, and since the cover skin 9 is attached without using the eyelet fitting 8, the cross section is semicircular. The curved back portion 3 has a smoother feel, and when it is held in the hand, it fits well on the entire palm and is easy to hold. Although the binder A and the file B have been described in the present embodiment, it is needless to say that the binder A and the file B can also be used as a carrying case for the purpose of storage in addition to a notebook with a thick back, an album, and the like.

[0011]

As described above, in the back structure of the binder or the like of the present invention, the entire back cover member is formed in a single plate shape, and further, the back part bulges outward and easily fits in the hand. Since it is curved in a semicircular shape in cross section, it is easy to hold in your hand when you carry it, and you can carry it stably. Further, since the structure is simple, it can be easily manufactured and provided at a low cost. Further, the back portion has a substantially semicircular cross section, which gives the shape a clean and soft feeling, and is also good-looking.

[Brief description of drawings]

FIG. 1 is a perspective view of a binder.

FIG. 2 is a transverse sectional view of the same.

FIG. 3 is a side view showing a usage state of the same as above.

FIG. 4 is a perspective view of a file showing another embodiment.

FIG. 5 is a transverse sectional view of the same.

[Explanation of symbols]

 1 Front cover member 2 Front cover part 3 Back part 4 Back cover part 6 Core material

Claims (1)

[Claims] 1. A front cover member is formed by connecting a front cover portion, a back portion, and a back cover portion in series to form a front cover member, and a core material made of a synthetic resin plate or the like having a substantially semicircular cross section is superposed on the back portion. A back portion structure such as a binder, which is fixed, and the back portion is curved outward in a substantially semicircular shape by the core material.