JP2008194418A - Deformable folding chair by bellow folding mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the subject in a conventional foldable seat that there is no seat which is built by a face material, needs no special joint, is safe, can be employed in a free form while continuously deforming it, and is foldable. <P>SOLUTION: A folding chair is given which has a mechanism which rotates a plane by using as a pivot, i.e., a bend line a pattern made by a parallel straight line group arranged on a two-dimensional plane and a polygonal line which symmetrically bends about it, that is, a structure which supports load by a table flap structure by deformation and folding performed by a mechanisms like a folded paper of bellow folding and a part touching the ground and a sitting surface part built by a ridgeline stood in a line on space, respectively. Since the mechanism is built by bending of a plane and an enough thin material can be used, a special movable joint is not needed and since the mechanism can be built by bending the face material, construction is simple and it is possible to use by safely deforming it at the time of employment. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a folding chair that can be used by being continuously deformed by a mechanism based on a folding line and a surface.

A well-known folding chair using a frame mechanism is well known.
In addition, there is a simple structure using a plate and a hinge using a face material.

  In the case of using a conventional frame mechanism, it is necessary to work a movable joint portion to obtain a scissor structure. At this time, since the movable joint portion is designed as little as possible due to the labor of the work, and there is a problem of safety, the movable joint portion is not suitable for the purpose of being used while the user continuously deforms the shape according to the application.

  In addition, the method of using plates and hinges when constructing the mechanism with face materials still has the danger of clogging fingers, and because there is a lot of work for moving parts, the shape of the user according to the application It is not possible to make a mechanism to use while continuously deforming.

  There is a chair that can be used in a free shape while being continuously deformed, and is made of a thin surface material that does not require a special joint by a mechanism based on a surface and a fold line. I did not.

  The present invention is a folding chair that can be used while being deformed by using a mechanism with a surface and a fold line, is continuously folded in its entirety, and has a folded plate structure for supporting a load with a face material. It is.

  The present invention is a foldable and deformable chair constructed by processing one or a plurality of sheet-like materials without in-plane deformation as a first problem solving means, and is arranged on a plane. Constructed by connecting two or more polygons on a two-dimensional surface divided by plane graphs, each of which is composed of a group of parallel lines and a group of polygonal lines intersecting all the groups of parallel lines. The ridge line corresponding to one or more fold lines on the graph is in contact with the ground and the ridge line corresponding to one or more fold lines is on the surface. It is a folding chair that is constructed to support the load. Here, a polygonal line that intersects a parallel line has a feature that the line segment as an element thereof is arranged so as to connect the adjacent parallel lines, and the adjacent line segments through the parallel lines form a symmetrical angle with respect to the parallel lines. It is.

  The present invention also provides a folding chair constructed as a second problem-solving means, in the first solving means, in particular, by forming a crease line along a graph on one sheet material and folding it. is there.

  Further, the present invention provides a third problem-solving means, in which the corner where the two faces sandwiched from the faces on both sides of the vertex, which is the node of the graph, is connected to the vertex is cut off. The present invention provides a folding chair that is characterized by the above.

  Further, the present invention provides a fourth problem-solving means, in particular, in the first solving means, by means of a graph-like pattern mechanism, a ridge line corresponding to one or a plurality of broken lines is developed from the upper end of the backrest by expansion in the rotational direction. Provided is a folding chair characterized by also serving as an upper end of an armrest.

  The effect of the first problem solving means is that a bellows that can be folded by using a group of parallel straight lines arranged on a two-dimensional plane and a pattern formed by a fold line that bends symmetrically as a rotation axis, that is, a fold line. It is to construct a mechanism like folding origami. Moreover, the shell effect by the folded-plate structure for supporting a load can be anticipated because the part which touches the ground, and a seat surface part are constructed | assembled by the ridgeline lined up in space. Since the mechanism is constructed by bending a plane and using a sufficiently thin material, a special movable joint is not required, and the mechanism can be constructed by bending a face material, making the work simple and safe for use. A folding chair that can be used by being deformed into a shape can be realized.

  Also, the action of the second problem solving means is that the mechanism can be constructed only by the rotation of the fold line without in-plane deformation of the face material of the first problem solving means. In other words, a movable folding chair is constructed by folding a single sheet material by utilizing the fact that even if constructed from a sufficiently thin material, the strength to support the load can be obtained.

  In addition, the action of the third problem solving means is that the first problem solving means folds at the node of the graph, that is, the intersection of the fold lines, when a mechanism is made using a face material having a certain thickness or more. By cutting off the corners that are pinched inside at that time, it is to avoid interference with a specific thickness.

  In addition, the action of the fourth solution means is not only spread on one axis in the deployment mechanism in the first solution means but also freely deforms according to the positional relationship with the desk and usage by rotating the surface while twisting. Is to build an armrest and backrest that can.

  As described above, the folding chair of the present invention can be constructed without making a special joint portion on a thin face material by adopting a structure that supports a load by a configuration with a fold line and a surface and a mechanism that deforms. It is possible to provide a folding chair that requires less work and can be used while the user can freely and continuously deform its form.

  Examples of application of the present invention will be described below. FIG. 1 is a plane graph, that is, a developed view, of a group of parallel straight lines and a group of broken lines for forming a mechanism in the present invention. In FIG. 1, vertical lines are parallel straight line groups, and intersecting with them is a broken line group. By using the line segment of this graph as the rotation axis, in FIG. 1, the surface is rotated as a mountain fold at the alternate long and short dash line portion, that is, rotation in the negative direction, and at the broken line portion as a valley fold, ie, rotation in the positive direction. Can be obtained. Further, when folded by this mechanism, it can be folded into a shape as shown in FIG.

  Now, as shown in FIG. 2, the ridge lines 1, 3, and 5 are in contact with the ground, and the two ridge lines sandwiched between 1 and 3 are connected to form a flat seating surface. The load on the two seating surfaces is supported at the ridges of 1 and 3 through the adjacent plates. By folding the surface finely, it becomes a folded plate structure, and it is possible to support the load with a thin sheet-like material.

  The angle of the broken line in FIG. 1 and the interval and the number of parallel lines are determined according to the dimensions of the seating surface and the backrest. As a different example to which the present invention is applied, as shown in FIG. 4, it is possible to use a plurality of ridge lines used for the seating surface instead of one. In this case, the ridgelines 2a and 2b construct a seating surface and support the ridgelines 1 and 3a and 3b in contact with the ground.

  The mechanism of the present invention can be constructed by folding using a sufficiently thin face material. If there is an ideally large sheet, it can be created from a single sheet. Moreover, it is also possible to construct by dividing and dividing each of them. For the folding line, a method using a perforation, a method of forming a crease by a press, a method of folding by a mold, and the like can be considered, and any method may be used.

  When folding a sheet-like material according to the present invention, depending on the thickness and rigidity of the material, there is a phenomenon that the thickness of the material interferes at the apex where the rotation axis, that is, the folding line intersects, and the folding cannot be performed smoothly, or the material is damaged Get up. Therefore, as shown in FIG. 6, this interference can be avoided by cutting in advance the corners sandwiched inside the apex portion when folded. 6, 7, 8, 9, and 10 in FIG. 6 are holes formed in the sheet by cutting the corners.

  As shown in FIG. 7, the mechanism of the folding chair of the present invention can be developed not only in one direction but also in the rotational direction. By not opening the ridge line on the seat surface side of the chair, it becomes a horseshoe-shaped folding chair, and the ridge line 4 constructs the upper end of the backrest and the armrest.

  FIG. 8 shows an example of deformation using the above-described development in the rotation direction. Here, a two-dot chain line represents a person using the desk. By pressing the book folding chair deployed in the rotational direction against the desk, the overall shape changes simultaneously with the construction of the armrest that is continuous with the desk surface. It can be used while being deformed according to the purpose of use at that time. Furthermore, it is folded and accommodated finally by pressing on a desk surface.

The expanded view of the 1st example of the folding chair which concerns on this invention 1 is a perspective view of a mechanism that is deformed by folding the plane graph of FIG. FIG. 2 is a perspective view of a mechanism that is deformed by folding the plane graph of FIG. The expanded view of the 2nd example of the folding chair which concerns on this invention The perspective view of the mechanism which deform | transforms by folding the plane graph of FIG. The development which made the corner pinched by folding of the vertex part in the folding chair of FIG. The perspective view of what the armrest and the backrest were constructed by developing in the rotation direction in the folding chair of FIG. Elevation showing how the armrest and backrest are deformed using the mechanism of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ridge line which touches the ground 2 Ridge line which forms a seat surface 2a One of the ridge lines which form the seat surface in the second example 2b One of the ridge lines which form the seat surface in the second example 3 Ridge line which touches the ground 3a On the ground in the second example One of the ridgelines in contact 3b One of the ridgelines in contact with the ground in the second example 4 The ridgeline forming the upper end of the backrest and the armrest surface 5 The ridgeline in contact with the ground 6 The hole in the vertex forming the seat surface 7 The hole in the vertex in contact with the ground 8 In the ground The top hole that touches the top 9 The top hole that forms the armrest surface with the top edge of the backrest 10 The top hole that forms the armrest surface with the top edge of the backrest

Claims (4)

A foldable and deformable chair constructed by processing one or a plurality of sheet-like materials without in-plane deformation, and a group of parallel lines arranged on a plane and a group of parallel lines A polygonal line that intersects all of the lines, and the line segment that is the element is arranged so as to connect the adjacent parallel lines, and the adjacent line segments through the parallel lines form a symmetric angle with respect to the parallel lines. With respect to a planar graph composed of arranged ones, it can be deformed and foldable by a mechanism constructed by connecting a plurality of polygons on a two-dimensional surface divided by the planar graph with line segments as rotation axes. And a structure that supports the load by the ridge line corresponding to one or more broken lines on the graph being in contact with the ground and the ridge line corresponding to one or more broken lines constructing a seating surface. Rukoto is characterized folding chairs. The folding chair according to claim 1, wherein the folding chair is constructed by attaching a graph-like folding line to a sheet material and folding it. The folding chair according to claim 1, wherein the corners connecting the two surfaces sandwiched from the surfaces on both sides are cut at the vertex that is the node of the graph when folded. . The folding chair according to claim 1, wherein a ridge line corresponding to one or a plurality of folding lines serves as both an upper end of a backrest and an upper end of an armrest when deployed in a rotation direction.

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