JP2015000145A - Folding furniture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piece of folding furniture having a stable leg part in use in spite of a simple structure.SOLUTION: A piece of folding furniture 10 includes: a pair of rod-like frame members 21 that are arranged in parallel with a space apart; a pair of shaft rods 51 that connects both ends of the rod-like frame members respectively; and a leg part comprising a pair of rod-like members 31 for legs that are rotatably attached to each of the shaft rods between the pair of rod-like frame members and that have a length less than a 1/2 of the length of the rod-like frame members, and comprising a connection member 32 that is stretched between the pair of rod-like members for legs. In addition, the piece of folding furniture has a leg support rod 41 which is rotatably attached to each of the shaft rods between the pair of rod-like members for legs, with the position in the axial direction of the shaft rods shifted from each other, which is brought into contact with the leg part, and which at the time of the contact has such a length that an angle formed by the rod-like members for legs of the leg part and by the rod-like frame members becomes smaller than 90°. In the piece of folding furniture, since the leg part is supported by the leg support rod of the other side, a load on the upper surface can be stably supported.

Description

  The present invention relates to furniture such as a foldable chair or desk.

  Conventionally, foldable chairs and desks have been used in outdoor and school gymnasiums (lecture halls), public halls, and the like. For example, Patent Document 1 discloses a pair of X-shaped leg portions, a pair of horizontal rod-shaped support portions that connect upper end portions of these X-shaped leg portions, and a pair of the support portions. There is disclosed a folding bench composed of a stretched annular sheet. This folding bench is lightweight because the seating surface is made of a seat, and can be folded so that the X-shaped leg is closed and the closed leg is overlapped with the rod-shaped support. Absent.

  Non-Patent Document 1 discloses a bench including a resin seat plate and a pair of H-shaped legs attached to both ends of the seat plate so as to rotate downward. Each of the H-shaped leg portions of the bench is fixed by a metal bracing material (stopper) extending from the seat plate so that the leg portion does not open more than 90 ° with the seat plate when used. When not in use, the fixed portion of the brace can be released and the H-shaped leg can be folded inside the bench. Non-Patent Document 2 discloses a bench composed of a wooden seat plate and a pair of inverted T-shaped leg portions rotatably attached to both ends of the seat plate. When the bench is not in use, its legs can be folded inside or outside the bench. Non-Patent Document 3 discloses a bench composed of a wooden seat and three pairs of wooden X-shaped legs. In this bench, the seat plate is divided into two at the center, and when the X-shaped leg portion is folded, the seat plate is also divided at the same time, and the seat plate is folded so as to sandwich the leg portion.

JP-A-7-246132

"Foldable bench FB-1", [online], Rakuten, [May 1, 2013 search], Internet <URL: http: //item.rakuten.co.jp/sunward/mibe-0006/> "Foldable natural wood bench 145 cm without back", [online], Rakuten, [Search May 1, 2013], Internet <URL: http: //item.rakuten.co.jp/royal3000/mt-023 /> "Natural Folding Folding Bench", [online], Kyotetsu Soichi, [Search May 1, 2013], Internet <URL: http: //keichiku.jp/SHOP/SK-12.html>

  In any of the above conventional benches, since the leg portion can be folded, it is necessary to firmly attach the leg portion to the main body so that the leg portion is not inadvertently folded during use. Therefore, there is a problem that the mechanism becomes complicated and the weight increases. In particular, in the bench of Non-Patent Document 1, which is commonly used in general, the bracing material is bent due to long-term use or the fixed portion is worn out, and the leg portion becomes wobbled during use. In this bench, since the bracing material (stopper) alone is used to counteract the force applied to the leg from the longitudinal direction of the seat plate, the wear of the bracing material is a serious problem in terms of safety.

  The problem to be solved by the present invention is to provide a folding furniture that can be folded compactly while having a simple leg and a stable leg during use.

Folding furniture according to the present invention made to solve the above problems,
a) a pair of rod-shaped frame members arranged in parallel at an interval;
b) a pair of shaft rods respectively connecting both ends of the rod-shaped frame member;
c) a pair of leg bar-like members having a length equal to or less than ½ of the length of the bar-like frame member, which is rotatably attached to each of the shaft bars between the pair of bar-like frame members; A leg portion composed of a connecting member spanned between a pair of leg-shaped members for legs;
d) A leg support bar that is attached to each of the shaft rods between the pair of leg bar-shaped members so as to be able to rotate by shifting the axial position of the shaft rods with respect to each other. And a leg support bar having a length such that an angle formed by the leg-shaped rod-shaped member of the leg portion and the bar-shaped frame member is smaller than 90 ° when abutting.

When the folding furniture according to the present invention is not in use, the leg bar-like members and the leg support bars attached to the shaft bars on both sides are all arranged in parallel with the bar-like frame member between the pair of bar-like frame members. And the whole is compactly accommodated in almost one surface (referred to as the “upper surface”).
In use, first, the leg attached to one shaft rod is rotated and pulled downward from the upper surface, and then the leg support rod attached to the other shaft rod is pulled downward from the upper surface. Then, the leg is attached to the one rod shaft. The place of contact may be a leg connecting member or a leg bar-like member. At this time, the angle formed by the leg-shaped rod member and the rod-shaped frame member of the leg is an angle smaller than 90 °. The same applies to the leg portion attached to the other shaft rod and the leg support rod attached to the one shaft rod. Thus, since the leg portion of the folding furniture according to the present invention is supported by the leg support bar on the other side, the load applied to the upper surface can be stably supported without providing a special reinforcing mechanism.
Between the pair of bar-shaped frame members on the upper surface, for example, a plate-shaped member suitable for use of the furniture is placed, or a sheet-shaped member is stretched between the pair of bar-shaped frame members. The upper surface of the furniture (for example, a seat surface for a chair, a top surface for a table, and a floor board for a bed) can be used as furniture.

  Between the pair of leg support rods, it is desirable to provide a single intermediate rod-shaped member having the same length as the rod-shaped frame member and having both ends attached to the pair of shaft rods. It is desirable to provide two intermediate bar-shaped members between the leg bar-shaped member and the leg support bar.

  With this configuration, the upper surface portion of the furniture is configured by a pair of rod-shaped frame members having both ends attached to the pair of shaft rods and an intermediate rod-shaped member therebetween. Thereby, a firm upper surface portion can be formed without impairing the compactness and without using other members.

  When an intermediate bar-shaped member is provided between a pair of leg support bars, one surface is flat when the leg bar-shaped member and the leg support bar are folded between the bar-shaped frame member and the intermediate bar-shaped member. It is desirable for the connecting member to connect the pair of leg bar members on the other surface side.

  With this configuration, when the furniture is not used, the pair of leg-shaped rod members and the pair of leg support rods are rotated and folded around the shaft rods, and between or near the adjacent rod-shaped frame members and intermediate rod-shaped members. Can be accommodated between intermediate rod-like members. Therefore, the furniture can be folded compactly with almost no gap between the pair of leg bars.

  The folding furniture according to the present invention has a simple mechanism in which the leg support bar comes into contact with the leg part so that the angle formed by the leg bar-like member of the leg part and the bar-like frame member is smaller than 90 ° when used. The leg can be stabilized. When folded, it becomes compact to the size between the pair of rod-shaped frame members, and becomes a substantially flat shape, which facilitates transportation and stacking.

The perspective view which looked at the state which installed the bench which is one Example of the folding furniture which concerns on this invention from the upper surface side. FIG. 2A is a schematic top view, FIG. 2B is a schematic front view, FIG. 3C is a schematic side view, and FIG. It is a schematic front view when assembling the bench of the same embodiment, (a) is a diagram showing the size and angle of each member, (b) shows the force applied when a person sits on the bench with an arrow FIG.

  The folding bench 10 which is one Example of the folding furniture which concerns on a present Example is demonstrated with reference to FIGS.

  The folding bench 10 of the present embodiment includes a seat surface portion, a pair of leg portions, and a pair of leg support portions that support the pair of leg portions. Each of the seat surface portion, the pair of leg portions, and the pair of leg support portions includes a wooden (for example, smoked) rod-shaped member as a basic element, and is configured by connecting two or seven rod-shaped members. In the present embodiment, the dimension of each part is set so that the length of the seat portion in the left-right direction is about 1800 mm, the length in the front-rear direction is about 315 mm, and the height when the bench 10 is installed is about 380 mm ( 3A), the dimensions of the bench 10 are not limited to this.

  The seat surface portion connects two rod-shaped frame members 21 positioned at both front and rear ends of the seat surface portion, five intermediate rod-shaped members 22 positioned between the rod-shaped frame members 21, and the rod-shaped frame member 21 and the intermediate rod-shaped member 22. And a pair of fixtures. The bar-shaped frame member 21 and the intermediate bar-shaped member 22 are set to have the same length in the left-right direction and the length (width) in the front-rear direction. On the other hand, the vertical length (height) of the rod-shaped frame member 21 is set to be larger than that of the intermediate rod-shaped member 22.

  The two rod-shaped frame members 21 and the five intermediate rod-shaped members 22 are arranged in parallel at a predetermined interval, and through holes are formed at both ends of both the members 21 and 22, respectively. An iron rod 51 (dotted line portion in FIG. 2 (a)) having a thread (male thread) cut at both ends is inserted through the through holes of both members 21 and 22. A washer 53 is inserted into a portion of the iron bar 51 that protrudes to the outside of the rod-shaped frame member 21, and a hexagonal cap nut 52 is screwed onto the thread. As described above, the two rod-shaped frame members 21 and the five intermediate rod-shaped members 22 are connected to each other, and a fixed portion is constituted by one iron bar 51, two hexagonal cap nuts 52, and two washers 53. The

  The pair of leg portions are connected between the left and right end portions of the seat surface portion, the pair of leg rod members 31 rotatably attached to each other and the free ends of the pair of leg rod members 31. It is comprised from the member 32 and the leg part reinforcement member 33 hung across the middle part of each pair of leg-shaped rod-shaped members 31 diagonally. The width and height of the leg bar-shaped member 31 are the same as those of the intermediate bar-shaped member 22, but the length in the left-right direction is set to about a quarter of the length of the intermediate bar-shaped member 22.

  The pair of leg support portions are hung on a leg support rod 41 that is rotatably attached to each other between the leg bar-shaped members 31 of the left and right ends of the seat surface portion, and a middle portion of each pair of leg support rods 41. It is comprised from the supporting connection member 42 passed. The width and height of the leg support bar 41 are the same as those of the intermediate bar-shaped member 22, but the length in the left-right direction is slightly shorter than that of the intermediate bar-shaped member 22. In the leg support portion, the leg support bar 41 is a bar-shaped member of the basic element.

  A through hole is formed at the end of the rod-shaped member constituting the leg and the leg support. The ends of the rod-shaped members constituting the leg portions and the leg support portions are arranged between the seven rod-shaped members at both ends of the seat surface portion, and the iron bar 51 is inserted so as to penetrate the through holes of all the rod-shaped members. Thus, the leg portion and the leg support portion are rotatably attached to both ends of the seat surface portion. Specifically, the end of the left leg leg-shaped member 31 is inserted into the iron bar 51 between the bar-shaped frame member 21 and the intermediate bar-shaped member 22 at the left end of the seat surface. Further, the leg member 31 for the leg on the right side is inserted into the iron bar 51 between the rod-shaped frame member 21 and the intermediate rod-shaped member 22 at the right end portion of the seat surface portion.

  The ends of the pair of leg support bars 41 of the left leg support part are located between the second and third intermediate bar-shaped members 22 from the front and the fourth and fifth from the front at the left end of the seat surface part. The steel bar 51 between the intermediate bar members 22 is inserted. Further, the ends of the pair of leg support bars 41 of the right leg support part are located between the first and second intermediate bar-shaped members 22 from the front and the third and fourth from the front at the right end of the seat surface part. The steel rods 51 are inserted between the first intermediate rod-shaped members 22. That is, the left leg support bar 41 and the right leg support bar 41 are pivotally attached to the left iron bar 51 and the right iron bar 51, respectively, with their positions shifted. A base rod-shaped member 44 as a spacer is disposed between the first and second intermediate rod-shaped members from the front and the third and fourth intermediate rod-shaped members 22 from the front at the left end portion of the seating surface portion. . Further, a base rod-shaped member 44 as a spacer is disposed between the second and third from the front and the fourth and fifth from the front at the right end of the seat surface. The left two base rod-shaped members 44 and the pair of leg support rods 41 and the right two base rod-shaped members 44 and the pair of leg support rods 41 are coupled by the base coupling members 43, respectively. When the leg support bar is rotated, the base bar-shaped member 44 is also rotated together.

  With the above configuration, as shown in FIG. 2, when the bench 10 is folded, the rod-shaped members constituting the leg portion and the leg support portion enter between the rod-shaped members of the seating surface portion with almost no gap, and the entirety thereof is almost the same. It is stored compactly in one surface (this is called the “upper surface”). Further, the height of the rod-shaped frame member 21 is set to such a size that the connecting member 32 of the leg-shaped rod-shaped member 31 and the leg reinforcement member 33 do not protrude outside the rod-shaped frame member 21 when the bench 10 is folded. (FIG. 2 (b)). For this reason, it is easy to stack and store furniture, or to stand sideways, and it is not bulky. Further, during transportation, the bench 10 that is folded compactly with almost no gap is formed into a gap (space) A (see FIGS. 2A and 2D) that can be formed at the center of the row of the rod members 31 for legs. By inserting a finger and holding the rod-shaped frame member 21 with one hand, it can be easily transported.

In order to assemble the bench 10 of the present embodiment, first, the pair of left and right leg bar members 41 attached to the iron bars 51 at both ends are rotated about the iron bar 51 and pulled downward from the upper surface. Next, the leg support bars 31 of the pair of left and right leg support parts, which are also attached to the iron bars 51 at both ends, are drawn downward from the upper surface. Then, the leg support bar 31 attached to the left iron bar 51 is brought into contact with the connecting member 32 of the leg part attached to the right iron bar 51. Similarly, when the leg support bar 31 attached to the right iron bar 51 is brought into contact with the connecting member 32 of the leg part attached to the left iron bar 51, the bench 10 is assembled. In addition, the free end of the leg bar-shaped member 41 and the free end of the leg support bar 31 are cut obliquely, and the leg bar-shaped member 41 and the leg support bar 31 are free so as to be stable when assembled on the bench 10. The end is in surface contact with the ground contact surface of the bench 10.
In the folding bench 10 of this embodiment, magnets that attract each other are attached to the free ends of the left and right leg support bars 41 and the contact portions of the left and right connecting members 32 with which the free ends abut. With this configuration, the leg support bar 41 can be guided to a fixed position of the connecting member 32 at the time of assembly, so that the assembly work is facilitated.

  In the bench 10 of this embodiment, as shown in FIG. 3 (a), left and right leg bar-shaped members 31 are supported by leg support bars 41 of right and left leg support parts, respectively. The position of the connecting member 32 and the length of the leg support bar 41 are set so that the angle between the bar-shaped member 31 and the upper surface portion is about 70 °. For this reason, when a person sits on the bench 10, the force F <b> 1 that pushes the upper surface portion of the bench 10 downward acts as a force that rotates the left and right leg bar-shaped members 31 not in the direction of arrow B <b> 1 but in the direction of arrow B <b> 2. Therefore, it is not necessary to provide a stopper or the like for preventing the leg bar-shaped member 31 from rotating in the arrow B1 direction. In addition, since the left and right leg support bars 41 are in contact with the connecting member 32, the leg bar-shaped member 31 is prevented from rotating in the direction of the arrow B2, so that the angle between the leg bar-shaped member 31 and the upper surface portion is increased. Maintained at about 70 °. As described above, the bench 10 according to the present embodiment has a simple configuration assembled using similar bar-shaped members. However, in order to maintain the angle of the leg-shaped bar-shaped member 31, a metal mechanism such as a metal fitting is used. Instead, the left and right leg support bars 41 made of the same material as that of the other rod-shaped members (wood in this embodiment) are used, and the force (compression force) applied to the left and right leg support bars 41 in the axial direction is used. Since the angle of the leg-shaped rod-shaped member 31 is maintained by using it, the shape of the bench can be stably maintained without being affected by damage, wear, or malfunction due to aging that occurs with metal fittings or the like. Further, even when an external force is applied to the leg bar-shaped member 31 from the longitudinal direction of the seat plate, the leg bar-shaped member 31 supporting the leg support bar 41 from the crossing direction (oblique direction) resists the external force. It is more stable than a conventional bench. Since the bench 10 of this embodiment is made of wooden material having a high compressive strength, it has a structure that is even stronger against compression from an oblique direction. Moreover, since the rod-shaped members constituting the seat surface portion of the bench 10 are arranged at intervals, and each rod-shaped member is easily bent when sitting on the bench 10, the sitting comfort is improved.

  As mentioned above, although the specific example was given and demonstrated about the form for implementing this invention, this invention is not limited to the said Example, A change is accept | permitted suitably in the range of the meaning of this invention.

For example, the number of rod-shaped members can be increased or decreased as appropriate according to the type of furniture, the state of use, and the installation location. For example, at least one leg support bar 41 on the left and right may be provided. Further, the attachment position of the leg connecting member 32 is limited to the distal end portion of the free end of the leg bar 31 as long as the pair of leg bars 31 can be connected and the leg support bar 41 can be locked. For example, it may be around the middle of the pair of leg bars 31 for legs.
Similarly, a member for reinforcing and / or stabilizing the legs and support of the folding furniture, and a member for rotating a plurality of members rotating around the fixed shaft (for example, in the above embodiment, The left and right support connecting members 42, support base connecting members 43, and leg reinforcing members 33) may be increased or decreased as appropriate according to the type of furniture, the state of use, and the installation location, and the arrangement and connection position may be changed. desirable.

The magnets affixed to the tip ends of the free ends of the pair of leg support bars 41 and the contact positions of the connecting members 32 of the leg parts are strong enough to guide the support bars to the fixed positions of the furniture leg parts. There is no particular limitation as long as the magnetic force pair has a magnetic attractive force, and one may be a magnet and the other may be a magnetic body. Moreover, it may be embedded in these members.
Furthermore, the contact part of the leg part which contacts a leg support bar is not limited to the connection member of a leg part, It is also possible to make it a rod-shaped member for legs.

  Furthermore, in the above embodiment, the rod-shaped members are all made of wood (bamboo), but are not limited to this, and materials used for general furniture (for example, natural wood such as cedar and firewood, recycled wood, polyethylene, Recycled polyethylene, recycled ABS, recycled PET, etc.).

  In the above embodiment, the upper surface is flat when the bench 10 is folded. However, the left and right ends of the upper surface of the bar member of the leg portion and the leg support portion are flat so that the upper surface is flat when the bench 10 is assembled. The part may be processed obliquely.

The folding furniture of the present invention can be applied as long as the basic structure is furniture composed of an upper surface portion and leg portions. Examples of applicable furniture include a chair, a bed, a table, and a shelf.
Further, the upper surface portion is not limited to the form formed by the pair of rod-shaped frame members 21 and the intermediate rod-shaped member 22. For example, the intermediate bar-like member 22 is eliminated and a plate-like member is placed on the pair of bar-like frame members 21 or a sheet-like member is stretched between the pair of bar-like frame members 21 to form the upper surface portion. Also good.

DESCRIPTION OF SYMBOLS 10 ... Bench 21 ... Bar-shaped frame member 22 ... Intermediate bar-shaped member 31 ... Leg bar-shaped member 32 ... Connection member 33 ... Leg part reinforcement member 41 ... Leg support rod 42 ... Support connection member 43 ... Support base connection member 44 ... Base bar-shaped member 51 ... Iron bar 52 ... Hexagon cap nut 53 ... Washer A ... Space

Claims (6)

a) a pair of rod-shaped frame members arranged in parallel at an interval;
b) a pair of shaft rods respectively connecting both ends of the rod-shaped frame member;
c) a pair of leg bar-like members having a length equal to or less than ½ of the length of the bar-like frame member, which is rotatably attached to each of the shaft bars between the pair of bar-like frame members; A leg portion composed of a connecting member spanned between a pair of leg-shaped members for legs;
d) A leg support bar that is attached to each of the shaft rods between the pair of leg bar-shaped members so as to be able to rotate by shifting the axial position of the shaft rods with respect to each other. And a leg support bar having a length such that an angle formed by the leg-shaped rod member and the rod-shaped frame member of the leg portion is smaller than 90 ° when abutting. .   The intermediate rod-shaped member having the same length as the rod-shaped frame member and having both ends attached to the pair of shaft rods is provided between the pair of leg support rods. The folding furniture according to 1.   Furthermore, two intermediate rod-shaped members having the same length as the rod-shaped frame member between the adjacent leg-shaped rod members and the leg support rods, both ends of which are attached to the pair of shaft rods. The folding furniture according to claim 2, wherein the folding furniture is provided.   When the leg bar-shaped member and the leg support bar are folded between the bar-shaped frame member and the intermediate bar-shaped member, the connecting member is connected to the pair of legs on the other surface side so that one surface is flat. The folding furniture according to claim 2 or 3, wherein the bar-shaped members are connected.   The height of the outer rod-shaped member is larger than the height of the leg portion and the pair of leg support rods, and when the folding furniture is folded, the height of the leg portion and the leg support rod is the outer rod shape. The folding furniture according to any one of claims 1 to 4, wherein the folding furniture does not exceed a height of the member.   A magnetic force pair attracting each other by a magnetic attractive force is attached to a tip portion of the leg support rod on the side not attached to the shaft rod and a portion of the leg portion where the tip abuts. The folding furniture in any one of Claims 1-5.

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