JP2005073902A - Paper chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper chair where necessary and sufficient strength is secured with a simple constitution, and assembling etc. is simple. <P>SOLUTION: The paper chair has a seat part 2 and a leg part 3 supporting the seat part. In order to arrange the leg part 3 under the seat part 2, an integrally formed paper material is folded. The leg part 3 has a pair of cylindrical structures folded nearly cylindrically. The cylindrical structures are closely combined to each other with fasteners consisting of separate paper material. Regarding the leg part 3, a part of opposing outer peripheral surfaces 3a are recessed so as to be arranged inside of the area of the seat surface 2a of the seat part 2 from a view of a plane. The opposing outer peripheral surfaces 3a of the leg part 3 are folded so as to constitute the structure of a bracing. At the lower end of the leg part 3, a plurality of nearly hooked foot parts arranged at the corner parts of the seat part 2 are formed to ground through the hooked foot parts. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a paper chair, typically a paper chair made of cardboard material.

  In particular, corrugated cardboard is widely used in a wide range of fields including the packaging field such as boxes for storing household electrical appliances. Recently, furniture and the like made using a corrugated cardboard material called reinforced corrugated cardboard are known.

  However, this type of paper product is combined with a large number of parts, and an adhesive or a dedicated metal fitting is used for the assembly. For this reason, there are problems such as time-consuming manufacturing and high costs. In addition, since it is a paper product, it is not always easy to ensure the strength, and if it is attempted to ensure the strength, the number of parts increases, resulting in a complicated structure.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a paper chair that ensures a necessary and sufficient strength with a simple configuration and is easy to assemble.

  The paper chair of the present invention is a paper chair having a seat portion and a leg portion that supports the seat portion, and the integrally formed paper material is folded so that the leg portion is disposed below the seat portion. The leg portion has a pair of cylindrical structures bent in a substantially cylindrical shape, and these cylindrical structures are tightly coupled to each other by a stopper made of a separate paper material. It is characterized by that.

  In the paper chair of the present invention, the leg portion is recessed so that a part of the outer peripheral surfaces facing each other are arranged inside the seating surface region of the seating portion in plan view.

  Moreover, the paper chair of this invention WHEREIN: The said outer peripheral surface which the said leg part opposes is bent so that a bracing structure may be comprised.

  Further, in the paper chair of the present invention, the lower end of the leg portion has a plurality of substantially key-like feet disposed at the corners of the seat portion, and through these key-like feet. It is characterized by grounding.

  According to the present invention, the seat portion and the leg portion that supports the seat portion are formed simply by bending the integrally formed paper material. Thus, it is composed of a small number of parts and does not use an adhesive or the like. In this case, it is possible to secure a high strength while being made of paper by devising the arrangement of the legs in particular.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a paper chair according to the invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows a paper chair 1 in this embodiment. The paper chair 1 has a seat portion 2 and a leg portion 3 that supports the seat portion 2. In this example, the seat portion 2 has a rectangular (such as a square) flat seat surface 2a, and is supported by the leg portion 3 below the seat surface 2a.

  FIG. 2 shows a developed state of the cardboard material for forming the paper chair 1. This cardboard material is formed as shown in the example in order to form the paper chair 1 using, for example, a reinforced cardboard having a two-layer structure. It includes a cardboard material 10 for forming a chair body made up of the seat 2 and the leg 3 and a cardboard material 20 for forming a separate stopper 4, and is formed into such a form by pressing or cutting. be able to.

  The cardboard material 10 includes a portion (hereinafter simply referred to as a seat) 11 for forming the seat 1 and a portion (hereinafter simply referred to as a leg) 12 for forming the leg 3. In this case, the leg portions 12 are provided on both sides of the seat portion 11. First and second leg portions 12A and 12B are attached to one side of the seat portion 11 via a fold line 13a. The first and second leg portions 12A and 12B are respectively provided with folds 13b and 13c so as to form corner portions of the paper chair 1. Abutting pieces 14 and 15 are extended outside the first and second leg portions 12A and 12B via folds 13d and 13e.

  In the above case, the folds 13a to 13e may be provided with shallow cuts or the like so as to be easy to bend and to maintain the necessary bonding strength when the cardboard material is bent along them. Further, the end portions of the abutting pieces 14 and 15 have abutting portions 14a and 15a that are formed so as to be closely aligned with each other. The abutting portions 14a and 15a are formed in a curved shape, preferably in a substantially S shape. The first and second leg portions 12A, 12B have an arch-shaped or semi-arch-shaped notch 16 at the end opposite to the seat portion 11. Furthermore, an engaging groove 17 for the stopper 4 is formed in the region on the side of the abutting pieces 14 and 15 along the fold lines 13d and 13e. A small window 18 is opened at an appropriate distance from the engagement groove 17 in the direction of the folds 13d and 13e. Small holes 19 are formed on both sides of the folds 13b and 13c near the seat 11 of the first and second leg portions 12A and 12B.

  Similarly, third and fourth leg portions 12C and 12D are attached to the other side of the seat 11 opposite to the one side described above via a fold line 13a. The basic configuration of the third and fourth leg portions 12C and 12D is substantially the same as that of the first and second leg portions 12A and 12B, and the same reference numerals are given to the same or corresponding members. .

  In this case, with respect to the abutting portions 14a and 15a of the abutting pieces 14 and 15, when the abutting pieces 14 and 15 on one side and the abutting pieces 14 and 15 on the other side are brought into close contact as described later, When the abutting portions 14a and 15a are arranged in the same arrangement relationship, that is, when one abutting portions 14a and 15a are arranged in an S shape, the other abutting portions 14a and 15a are reversed S It is formed so as to be arranged in a letter shape.

The corrugated cardboard material 20 for forming the stopper 4 is formed in a substantially strip shape as shown in FIG. A U-shape is formed by bending along the two folds 21a and 21b, and a slit 22 formed in the longitudinal direction is provided on both sides of the U-shape. This slit 22 is adapted to engage with an engagement groove 17 provided in the leg portion 12. A small protrusion 23 that engages with the small window 18 provided in the leg portion 12 is formed at an appropriate position in the middle of each slit 22.
Next, an example of assembling the paper chair 1 using the cardboard material 10 and the cardboard material 20 will be described.

  When the chair body is formed of the cardboard material 10, for example, the first and second leg portions 12A and 12B are first bent (valley folded or mountain folded) along the folds 13b and 13c, and then along the folds 13d and 13e. The abutting pieces 14 and 15 are bent. As a result, as shown in FIG. 3, a substantially cylindrical tubular structure composed of the first and second leg portions 12A and 12B is formed. Since the folds 13b, 13c and the like are previously provided, these folding operations can be performed easily and appropriately.

Although the cylindrical structure has a closed cross section by abutting the abutting portions 14a and 15a of the abutting pieces 14 and 15, the cross sectional shape is substantially rectangular. In this embodiment, the total width 2w ₁ (see FIG. 2A) of the abutting pieces 14 and 15 is set to be appropriately shorter than the width w ₂ on one side of the seat portion 11. That is, strictly speaking, the cross-sectional shape of the cylindrical structure is a trapezoid whose upper base side is slightly shorter than the lower base side.

  Further, the third and fourth leg portions 12C and 12D on the other side of the seat portion 11 are sequentially bent along the fold lines 13b and 13c and the fold lines 13d and 13e as in the case of the one side. As a result, a substantially cylindrical tubular structure including the third and fourth leg portions 12C and 12D is formed on the other side as shown in FIG. In this way, a pair of cylindrical structures are formed on one side and the other side of the seat portion 11.

  Next, as shown in FIG. 4, for example, first, the cylindrical structure on one side of the seat 11 is bent along the fold line 13a until it hits the seat 11, that is, 90 °. Subsequently, the cylindrical structure on the other side is similarly bent, so that the pair of cylindrical structures are juxtaposed in a standing manner on the seat 11 (the back side of the seating surface 2a) (see FIG. 5). ). In this case, as shown in FIG. 6 (a), the abutting portions 14a and 15a on one cylindrical structure side are arranged in an S shape, and the other abutting portions 14a and 15a are arranged in an inverted S shape. Is done. By setting the arrangement relationship of the abutting portions 14a and 15a in this way, the abutting pieces 14 and 15 are restricted from projecting or projecting to the other side between the pair of cylindrical structures, and each cylinder is regulated. The abutting pieces 14 and 15 of the shaped structure are properly in close contact with each other. When the chair body is assembled by folding along the folds 13a to 13e as described above, the order of folding the folds can be changed as necessary.

  Next, as shown in FIG. 5, the stopper 4 bent so as to have a U-shape is attached to the chair body. That is, in this case, the slit 22 is engaged with the engagement groove 17 (see FIG. 2) in such a manner that the abutting pieces 14 and 15 that are in close contact with each other between the pair of cylindrical structures are sandwiched from both sides. The small protrusion 23 of the slit 22 is engaged with the small window 18. Thereby, the pair of cylindrical structures juxtaposed as described above are tightly coupled to each other by the stopper 4, and the paper chair 1 having the seat part 2 and the leg part 3 supporting the same as shown in FIG. Is assembled.

  In the paper chair 1 of the present invention configured as described above, only two parts including the cardboard material 10 and the cardboard material 20 in which the seat portion 11 and the leg portion 12 are integrally formed are used, and no adhesive is used. Without being done, it is basically formed by a simple bending process. As described above, since the number of component parts is extremely small and the structure is simple, assembly is easy and time-consuming. Since a paper material is used, the chair is lightweight and can be realized with excellent handling in actual use.

  Since the number of components is minimized to two, the number of joints between the two parts has been reduced to the limit, preventing the strength from being reduced due to looseness that tends to occur at the joints or combination parts, ensuring extremely high strength be able to. That is, in particular, according to a pair of cylindrical structures made of the first to fourth leg portions 12A to 12D, the so-called wall structure in which one plate-shaped paper material is formed into a cylindrical shape and folded in half. Realized. This structure is substantially the same as that used in, for example, building technology, and can effectively suppress the occurrence of distortion and twisting.

  Further, as described above, since the cylindrical structure is typically trapezoidal in this embodiment, the leg portion 3 is partly opposed to the outer peripheral surface as shown in FIG. 3a is arrange | positioned inside the seat surface 2a area | region of the seat part 2. As shown in FIG. In this way, a part of the outer peripheral surface 3a is recessed with respect to the seat portion 2 to prevent the seat portion 2 from falling off, so that a load (for example, Z in FIG. Direction) can be reliably received by the leg 3. In this case, since the outer peripheral surface 3a recessed from the seat portion 2 is inclined inward, the same effect as that of the bracing 5 (see the two-dot chain line) can be obtained between the opposite side and the seat portion 2. Is reliably transmitted to the cross section of the leg 3 and the load resistance is greatly improved.

  Further, in the coupling structure in which the pair of cylindrical structures are integrated, the abutting pieces 14 and 15 that are in close contact with each other function as a joint for completing the integrated structure. The outward opening in the direction (for example, particularly the X and Y directions in FIG. 1) is prevented. In this case, the lock (tightening) effect of the chair body is improved in the eye direction of the plate.

  Further, in the paper chair 1 of the present invention, the lower end of the leg portion 3 has a plurality of substantially key-like feet disposed at the corners of the seat portion 2, and through these key-like feet. Ground. That is, by cutting the leg portion 3 into an arch shape, as shown in FIG. 6B, the first to fourth leg portions 12A to 12D are each formed with a key-like foot portion 6. The ground load is not grounded at the entire lower end (or the entire circumference) of the leg 3 but is grounded by a plurality (four in this example) of the foot 6 so that the loaded load is a key-like foot of the leg 3. 6 can be reliably transmitted, and can be prevented from rattling when seated due to so-called unevenness (unevenness) such as a floor, thereby ensuring stability. Furthermore, since each foot part 6 is key-shaped, it has a high rigidity and strength because it is configured in a three-dimensional manner instead of a simple one-piece structure, and there is no risk of causing buckling when receiving a load, Extremely safe.

  As described above, the abutting pieces 14 and 15, which are close contact portions between the cylindrical structures, have S-shaped abutting portions 14 a and 15 a having an opposite arrangement relationship. For this reason, it is possible to prevent catching at the time of assembling, and to facilitate the assembling work without being engaged with the close contact side. Moreover, when receiving the load provided with respect to the abutting parts 14a and 15a, the load can be distributed and handled by a long path along the S-shape, and the load resistance can be improved in this respect as well.

Here, in actual use, the small hole 19 can be used to fasten the strap of the cushion used when sitting on the seat 2.
Alternatively, as shown in FIG. 7, a paper tube 100 for connection inserted through a small hole 19 on the outer peripheral surface 3 a side of the leg portion 3 is used, and a plurality of paper chairs 1 are arranged in a continuous manner. be able to.

In addition, although the preferred embodiment of this invention was described, this invention is not limited only to embodiment mentioned above, A change etc. are suitably possible as needed.
For example, the example of the two component parts of the corrugated cardboard material 10 and the corrugated cardboard material 20 has been described, but it can be increased as necessary. Moreover, the cross-sectional shape of the cylindrical structure may be other than a trapezoid, and may be, for example, a triangle or other polygons. Furthermore, the shape of the abutting portions 14a and 15a of the abutting pieces 14 and 15 can be an appropriate curve such as an arc shape in addition to the S-shape.

It is the perspective view and bottom view which show the paper chair which concerns on embodiment of this invention. It is a top view which shows the example of the cardboard raw material in embodiment of this invention. It is a perspective view which shows the assembly process of the paper chair which concerns on embodiment of this invention. It is a perspective view which shows the assembly process of the paper chair which concerns on embodiment of this invention. It is a perspective view which shows the assembly process of the paper chair which concerns on embodiment of this invention. It is the front view and perspective view which respectively show the contact | adherence state of the abutting piece and the key-like leg part of a leg part in embodiment of this invention. It is a perspective view which shows the usage example of the paper chair which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper chair 2 Seat part 3 Leg part 4 Stopper 6 Foot | leg part 10,20 Corrugated cardboard material 11 Seat part 12 Leg part 13a-13e Folding 14,15 Abutting piece 16 Notch 17 Engaging groove 21a, 21b Folding 22 Slit

Claims (4)

A paper chair having a seat and a leg for supporting the seat,
The integrally formed paper material is bent so that the leg portion is disposed below the seat portion, and the leg portion has a pair of cylindrical structures bent in a substantially cylindrical shape. A paper chair characterized in that these cylindrical structures are tightly coupled to each other by a stopper made of a separate paper material.   2. The paper chair according to claim 1, wherein the leg portion is recessed so that a part of the outer peripheral surfaces facing each other are arranged inside the seating surface region of the seating portion in plan view.   The paper chair according to claim 2, wherein the opposing outer peripheral surfaces of the leg portions are bent so as to form a bracing structure.   A plurality of substantially key-like feet disposed at corners of the seat at the lower end of the leg, and are grounded through these key-like feet. The paper chair according to any one of 3 above.

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