JP2006081565A - Link part structure of processed bamboo and load support structural body using processed bamboo - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a link part structure using the processed bamboo unloosened with a simple structure. <P>SOLUTION: The link part structure 12 of the load support structural body 10 using the processed bamboo has a hole 16 each provided in isolated parts facing each other of a frame 12 of the load support structural body 10 containing load support parts (24 and 26), an elastomer 18 which is fitted tightly into the hole 16 and has an insertion hole 32 inside and a vertically split processed bamboo 20 which is made free to get it into or out of the insertion hole 32 of the elastomer 18 while being fitted into it. The insertion hole of the elastomer is so formed that the part tightly put on the surface part of the vertically split processed bamboo 20 as it is inserted into it presents a circular arc 34 in cross section. The part with the arcuate cross section of the insertion hole of the elastomer absorbs variations in the shape of the surface part of the processed bamboo, thereby realizing an unloosened better link part structure. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connecting portion structure of processed bamboo and a load support structure using the processed bamboo.

  Conventionally, in a chair in which a leg frame or a back frame is made of a pipe material, a support plate such as a seat plate or the like constituting a seat portion of the chair or a back plate constituting the back portion is made of a material such as a synthetic resin. There are many things. Further, in order to attach the seat plate to the leg frame, an attachment mechanism is required on the back surface of the seat plate as disclosed in Patent Document 1, for example. According to Patent Document 1, on the back surface of the seat plate (9), the hook pieces (12), (12) and the stoppers corresponding to the latching portions of the seat frame (3) and the stays (6), (7), etc., respectively. Attachment pieces (13) and (13) are provided. A fastening piece is provided so as to be bent toward the latching portion, the fastening piece is bent toward the back side of the latching portion, and the latching portion is wrapped. An attachment mechanism that can be held and fixed has been proposed.

  However, since synthetic resins such as plastic are difficult to be decomposed, there is a problem in industrial waste treatment. Therefore, it is effective to switch the synthetic resin, which is an artificial material, to a natural material. As natural materials, wood and bamboo exist, but in the case of wood, the growing period until it can be used as a material is as long as 10 years, and recently the problem of depletion of wood resources has been highlighted. . On the other hand, in the case of bamboo, the growing period is as short as about 2 years, and the risk of similar resource depletion is low. In addition, chairs using bamboo materials are excellent in design, and can be said to correspond to consumer-oriented changes in which chairs are positioned as interiors. Furthermore, bamboo is richer in elasticity than synthetic resin and wood, and is superior in terms of sitting comfort. Therefore, there is a high industrial need for using processed bamboo made of bamboo as part of a chair support.

  However, when the processed bamboo is used as a part of the support body, it is difficult to provide the above-described attachment mechanism and structure for attaching the support body to the chair frame as compared with the case of synthetic resin or wood. Therefore, there is a method in which an opening for inserting processed bamboo is provided in the frame, and the support body is attached to the frame by inserting processed bamboo into the opening.

In this method, since bamboo is a natural material, there is a variation in dimensions depending on the diameter of the bamboo, which causes a problem of rattling as a whole chair caused by rattling in the insertion portion. In order to remedy that problem, it is necessary to prevent rattling by inserting a piece of bamboo material that has been cut according to the opening size of the frame. There was a problem in terms. Furthermore, bamboo has the advantage that the part of the surface is hard and has a strong bending strength, but it may be necessary to cut the surface part during the cutting process. There was also a problem that led to a decrease in strength.
Japanese Patent Laid-Open No. 11-9380

  The present invention has been made in view of the above-described conventional problems. One object of the present invention is to use the above-described attachment mechanism and the above-described attachment mechanism on a processed bamboo when the processed bamboo is used as a part of a support body for a load support structure such as a chair. An object of the present invention is to provide a connecting portion structure of processed bamboo that does not require a structure, an elastic body used in the connecting portion structure, and a load support structure using the processed bamboo. Another object of the present invention is to provide a processed bamboo joint structure for producing a load supporting structure easily without cutting off the strength of the processed bamboo by cutting the surface portion of the processed bamboo, and the elasticity used therefor. It is providing the load support structure using a body and processed bamboo. Another object of the present invention is to provide a processed bamboo joint structure capable of producing a load-supporting structure without rattling, even if there is a variation in the size of the processed bamboo due to the diameter of the bamboo, which is a natural material, and the elasticity used for it. It is providing the load support structure using a body and processed bamboo.

  In order to achieve the above object, the present invention provides a hole 16 provided in each of the opposed portions of the frame 14 of the load support structure 10 including the load support portions (24, 26). An elastic body 18 that is fitted in a close fitting manner and has an insertion hole 32 inside, and a vertically split bamboo 20 that is detachably attached to the insertion hole 32 of the elastic body 18 and is fitted in a close fitting manner. The insertion hole 32 of the elastic body 18 has a circular arc-shaped section 34 in a portion where the end of the vertically split bamboo 20 is inserted and is in close contact with the surface portion (36) of the vertically split bamboo 20. It is comprised from the connection part structure of the load support structure 10 using the processed bamboo characterized by forming. The frame may be hollow or solid, and the cross-sectional shape may be any other shape such as, for example, a circle, an oval, a quadrangle, or a polygon. The material of the frame may be metal, alloy, synthetic resin, wood, or any other material. Examples of the load support portion of the load support structure include a load support portion directly loaded by a person such as a seat portion of a chair, a backrest portion, a bed base portion, and other furniture such as a stand, a step platform, a shelf, a bridge, etc. It can be applied to load support portions of various load support structures such as buildings.

  At that time, the surface portion 36 of the vertically split bamboo 20 may hold a non-cutting surface layer.

  Moreover, the connection part structure 12 is good also as a load support part being the seat part 26 of the chair 10. FIG. The chair may be in any other form such as a legged chair, a seated chair, a chair with a backrest, a chair with an armrest, a rocking chair, a bench, a chaise longue, a sofa, and the like.

  The elastic body 18 may be a ring rubber. The rubber material forming the elastic body may be any other rubber material such as urethane rubber or silicon rubber.

  Further, the present invention is constituted by an elastic body 18 used for the connecting portion structure 12.

  Moreover, this invention is comprised from the load support structure (10) which has the connection part structure 12 using processed bamboo, or the elastic body 18 used for it.

  According to the connecting portion structure of the load support structure using the processed bamboo of the present invention, the holes provided in the spaced-apart portions of the frame of the load support structure including the load support portion, and the close fit An elastic body that is fitted together and has an insertion hole on the inside, and a vertically split bamboo that is detachably attached to the insertion hole of the elastic body and is fitted in a close-fitting manner, and is elastic The insertion hole of the body has a simple connecting part structure because the part where the end of the vertically split bamboo is inserted and the surface part of the vertically split bamboo is in close contact with the surface part of the vertically split bamboo forms an arcuate section. The elastic body is fitted into the vertically split bamboo in a close fitting manner, and the elastic body is simply inserted into the hole of the frame of the load supporting structure, for example, a seat portion of a chair The processed bamboo can be connected to the load supporting part such as. At that time, the elastic body interposed between the processed bamboo and the hole of the frame absorbs the variation in the radius of the surface portion of the processed bamboo by the arc-shaped portion provided inside the elastic body. By deforming in accordance with the shape, it is possible to reliably connect the processed bamboo and the frame while satisfactorily preventing backlash. Furthermore, since the cross-section arc-shaped portion of the insertion hole of the elastic body is close to the arc shape of the surface portion of the processed bamboo, the elastic body composed of a certain degree of hardness is deformed with an excessively strong force during insertion work. Therefore, it can be smoothly and easily inserted and fitted, and the assembling workability of the connecting portion structure is good. At the same time, as long as the width and thickness of the processed bamboo are cut out from the raw bamboo material, the subsequent processing of the processed bamboo becomes unnecessary, and the mass productivity in the production of a structure such as a chair is excellent.

  In addition, by adopting a configuration in which the surface portion of the vertically processed bamboo holds a non-cutting surface layer, a hard surface layer formed on the surface portion of the bamboo can be used, and the processed bamboo itself and the load The strength of the connecting portion structure of the support portion can be maintained.

  In addition, since the load support part is a chair seat part, for example, it is excellent in design, warm due to natural materials, rich in elasticity and comfortable to sit on, and efficient use of bamboo resources is environmentally friendly It is possible to manufacture a chair using the advantages unique to bamboo materials such as.

  In addition, by adopting a configuration in which the elastic body is an annular rubber, it is possible to specifically realize a configuration that can effectively function as an elastic body with a simple and compact structure, and is excellent in mass productivity and at low cost. Can be manufactured. Moreover, it is not bulky and can be easily carried by packing.

  According to the elastic body used in the connecting portion structure of the present invention, the connecting portion structure of the processed bamboo and the load supporting structure frame can be configured simply by inserting operation with a simple and compact structure. Furthermore, it is possible to satisfactorily absorb the variation in the surface shape of the vertically divided bamboo and to construct a reliable connection part structure without backlash. Furthermore, it is not necessary to cut the surface part of the processed bamboo, the manufacturing process is simple, the mass production of the load supporting structure or their constituent members is possible, and the hard surface layer of the processed bamboo is effectively used to improve the strength. An excellent load supporting part can be realized.

  In addition, according to the connecting portion structure using the processed bamboo of the present invention or the load supporting structure having an elastic body, it can be manufactured with a simple structure at low cost, has no backlash, and has high strength against load. A load support structure can be manufactured.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a processed bamboo connecting portion structure and a load supporting structure using the processed bamboo will be described below with reference to the accompanying drawings. The connection part structure of the processed bamboo of the present invention is applied to a connection part between the vertically split processed bamboo and the frame in a load support structure using the processed bamboo, for example, a load support part such as a seat part of a chair. 1 to 8 show an embodiment of a connecting portion structure and a load support structure using the processed bamboo of the present invention.

  In the present embodiment, the connecting portion structure (hereinafter simply referred to as “connecting portion structure”) 12 of the load supporting structure using the processed bamboo includes a hole 16 provided in the frame 14 of the load supporting structure (10), It has an elastic body 18 fitted into the hole, and a vertically split bamboo 20 fitted into the elastic body 18 in a close fitting manner. In the present embodiment, the load support structure is, for example, a chair 10 with a backrest, and as shown in FIGS. 1, 2, and 3, the seat 24 is supported on the support leg 22 at a certain height, A backrest portion 26 is provided on the back side of the seat portion 24. In the present embodiment, as shown in FIGS. 4 and 5, the chair 10 has a frame 14 formed integrally with the support legs 22 on both the left and right sides, and is disposed between the opposed frames 14. A plurality of vertically-processed bamboos 20 forming a seat portion 24 and a backrest portion 26 are arranged and installed in a bar shape. That is, in this embodiment, the connection part structure 12 is a load support part of the seat part 24 or the backrest part 26 to which a load is applied when a person is seated on the chair 10, and is a connection part between the processed bamboo 20 and the frame 14. Used for.

  In this embodiment, as shown in FIGS. 1, 2, and 3, the support leg 22 is made of a metal hollow round pipe member, and is arranged vertically in a substantially C shape so as to be opposed to the front and rear. The frame 14 is fixed to the upper end side. The frame 14 is made of a metal hollow round pipe member, like the support legs 22, and is formed by bending in a substantially L shape in side view, and integrally forming a frame of the seat portion 24 and the backrest portion 26. In the present embodiment, the frame 14 is opposed to the frame 14 while being separated by a certain amount in the width direction in a state where the frame 14 is erected by the support legs 22, and is connected and fixed by a connection frame 28 installed therebetween. The connection frame 28 firmly connects the opposing frames 14 to improve the assembly strength of the entire chair. In this embodiment, as shown in FIG. 5, the connecting frame 28 is formed by assembling a metal round pipe bent in a substantially U shape symmetrically so that the end faces outward. Four support legs 22 are connected. A fixed plate portion 29 having an arc contact surface is provided at each end of the connection frame 28 so as to contact the inner side of the support leg 22. The fixing plate portion 29 has a female screw portion, and is fixed to the support leg with a screw 30 penetrating the support leg 22 laterally while being in contact with the inside of the support leg 22. Note that the connecting frame 28 may have any other configuration such as, for example, a linear ridge, an X-shaped frame configuration, and the connecting position is not limited to the support leg 22, and any other location such as a frame seat portion or a backrest portion. But it ’s okay. In addition, the connection frame is preferably provided to maintain the strength of the chair, but it is not always necessary to provide the connection frame. In the present embodiment, holes 16 are provided in opposing portions of the opposed frames 14. A plurality of holes 16 in the frame 14 are formed in parallel corresponding to positions where the seat portion 24 and the backrest portion 26 of the frame 14 are formed. Each hole 16 is formed in, for example, a horizontally long round shape, and is formed in a certain size and shape.

  In the present embodiment, the vertically-processed bamboo (hereinafter also referred to as “processed bamboo”) 20 is connected to the holes 16 of the frame 14 via elastic bodies 18 to be described later, and a seat portion 24 and a backrest portion. 26 is configured. As shown in FIG. 9, the processed bamboo 20 has a circular cross section after being cut into a certain length using, for example, a bamboo shoot with a diameter of about 8 to 12 cm (radius of 4 to 6 cm) grown for about two years. It is made of bamboo material that has been vertically divided so as to be equally divided. The processed bamboo 20 is arranged so that the surface portion 36 faces the front, and is arranged on the seat portion and the backrest portion so as to be a contact surface with a person (loading body). In the present embodiment, the processed bamboo 20 has a length of about 41 cm and a width W of about 3 cm, and the lower surface side is cut flat while the surface side is held in a circular arc shape, and the thickness D is about 1 cm. It is set to a certain size so that The corners of the processed bamboo may be chamfered or rounded. The surface portion 36 formed on the arcuate curved surface of the processed bamboo 20 that has been vertically divided as described above is due to the difference in the growth degree of the raw material bamboo, the difference in the location such as the root side and the tip side portion side of the raw material bamboo, etc. The arcuate curved surface shape of the surface portion of the processed bamboo has subtle variations. For example, in FIG. 9, the left bamboo 201 has a radius R1 of 4 cm, and the right bamboo 202 has a radius R2 of 6 cm. As shown in the figure, due to the difference in the radius of the raw material bamboo, for example, when cutting vertically and cutting out to a certain dimension of width W and thickness D, processed bamboo 20a, 20b processed from each bamboo There are subtle differences in the surface area. Further, a hard surface layer is formed on the surface portion 36 of the bamboo. In the present embodiment, the processed bamboo 20 is used in a state in which the hard surface layer of the surface portion 36 is not cut at all and the enamel is retained and the surface layer 36 of the processed bamboo 20 is retained. An arc curved surface is used in a state where each processed bamboo varies.

  As shown in FIGS. 6, 7, and 8, the elastic body 18 has an insertion hole 32 into which an end of the processed bamboo 20 is detachably inserted, and the processed bamboo 20 is fitted into the insertion hole 32. It is inserted into the hole 16 of the frame 14 while being worn. The elastic body 18 is interposed between the hole 16 of the frame and the processed bamboo 20 so that the processed bamboo can be easily assembled to the frame by a simple insertion operation, and the elastic deformation as shown in FIG. The variation in the arcuate curved surface shape of the surface portion 36 of the processed bamboo 20 is absorbed, and rattling in the connecting portion structure 12 is prevented. In this embodiment, the elastic body 18 has a three-dimensional horizontally long round cylindrical shape whose cross-sectional shape corresponds to the size and shape of the hole 16 so that the outer shape thereof fits closely into the hole 16 of the frame 14. Is formed with a certain degree of hardness, and is provided so as to be inserted from the hole 16 of the frame into the frame with a certain insertion depth. Insertion holes 32 are formed in the elastic body 18 so as to open the opposite inner side in a state where the elastic body is fitted into the holes 16 of the respective frames. In the present embodiment, the elastic body 18 is made of an annular rubber having an edge with a certain thickness of, for example, about 2 mm around the periphery so as to form the insertion hole 32 at the center inner side.

  The insertion hole 32 is formed so as to fit the processed bamboo 20 inserted into the elastic body 18 in a close fitting manner. In the present embodiment, the cross-sectional shape of the processed bamboo is formed in a shape approximately approximate to the horizontal width Wh corresponding to the width W and the thickness D of the processed bamboo while having a flat portion on the lower side of the insertion hole 32. It has a height Hh. Furthermore, the upper surface side of the insertion hole 32, that is, the portion into which the processed bamboo 20 is inserted and is in close contact with the surface portion 36 of the processed bamboo forms an arcuate section 34. The cross-section arc-shaped portion 34 of the insertion hole 32 is formed in a shape substantially similar to the cross-section arc shape of the surface portion of the processed bamboo 20, and when inserting and fitting the end portion of the processed bamboo 20 into the elastic body 18, to some extent. The insertion operation can be performed easily and smoothly in a short time with respect to the insertion hole 32 of the elastic body having the above hardness. Moreover, the elastic deformation rate of the elastic body 18 when the processed bamboo 20 is fitted is small, and the elastic body 18 can be smoothly inserted and fitted into the hole 16 of the frame. Assembling workability is good, and mass production is excellent when manufacturing a chair. In addition, when the upper surface side of the insertion hole 32 is processed into a linear shape, for example, the elastic body is formed by the arc-shaped curved surface of the surface portion of the processed bamboo 20 as compared to the case where the cross-section arc-shaped portion is provided as described above. The deformation ratios of the upper surface side and the lower surface side are greatly different. Therefore, it is necessary to insert the elastic body configured with a certain degree of hardness with a strong force so as to push it wide, and the insertion workability is poor. Further, when the processed bamboo is fitted, the elastic body 18 itself is easily deformed so as to swell laterally, and a strong insertion force is required when inserting the elastic body 18 into the hole 16 of the frame. Assembling work cannot be performed smoothly, and the mass productivity when manufacturing a chair or the like is also inferior.

  In the present embodiment, the radius Rh of the cross-sectional arc portion 34 of the insertion hole 32 is, for example, about 4 cm in accordance with the smallest radius of the arc-curved surface shape among the processed bamboo used. A processed bamboo 20 having a surface portion larger than the diameter of the cross-section arc-shaped portion 34 of the insertion hole whose radius is about 5 to 6 cm is fitted, for example, to the surface portion of the processed bamboo 20 having a different radius. In this case, as shown by a broken line in FIG. 7, the processed bamboo 20 is closely fitted to the elastic body 18 while the edge around the insertion hole of the elastic body is elastically deformed in a crushed shape. Further, the elastic body 18 is elastically deformed so as to be fitted into the hole 16 of the frame and is closely fitted with no gap. As described above, the elastic body can absorb the variation of the arc curved surface radius of the surface portion of the processed bamboo and can satisfactorily connect the processed bamboo 20 and the frame 14 while preventing backlash. The elastic body 18 itself has a simple structure and is excellent in mass productivity. In addition, the processed bamboo 20 only needs to be machined vertically into a predetermined dimension, and since the surface portion is in a non-cutting state, complicated work is not required and mass productivity is excellent. The hard surface layer formed in the portion can be effectively used, and the strength as a load supporting structure is high and practical.

  Next, the operation of the connecting portion structure according to this embodiment will be described. As shown in FIGS. 1 and 2, the chair according to the present embodiment is disposed so as to face each other in a state where the frame 14 configured integrally with the support legs 22 is upright. The opposed frames 14 are connected by a connecting frame 28 that connects the four support legs 22, and the frame structure including the support legs 22 is firmly connected to maintain the strength of the entire chair. . Simultaneously with the connecting operation of the support legs 22 (frames) by the connecting frame 28, the elastic body 18 is fitted into the hole 16 provided in the opposite portion of each frame 14, and processed into the insertion hole 32 of the elastic body 18. The end portion of the bamboo 20 is inserted and fitted to form the seat portion 24 and the backrest portion 26 of the chair. In addition, the processed bamboo 20 is used while the surface portion is not cut and a hard surface layer is held, and the arc radius of the surface portion varies. For example, when a processed bamboo having a radius of processed bamboo larger than the diameter of the insertion hole 34 is fitted, the edge is crushed from the inside of the elastic body by the processed bamboo as shown by a broken line in FIG. The processed bamboo 20 is tightly fitted to the elastic body 18 while being elastically deformed. That is, even if there is a variation in the shape of the surface portion of the processed bamboo, the variation in the surface side of the processed bamboo 20 is caused by the elasticity of the elastic body itself and the cross-section arc-shaped portion 34 formed in the insertion hole 32 of the elastic body 18. The seat portion 24 and the backrest portion 26 can be formed without rattling without absorbing and cutting the end portion. Furthermore, the cross-section arc-shaped portion 32 of the insertion hole 32 of the elastic body allows the processed bamboo to be inserted into the elastic body 18 having a certain degree of hardness with a reduced elastic deformation rate. Assembling workability in the connecting portion structure between the frame 14 and the processed bamboo 20 is good, and mass productivity in chair production is excellent. Since the surface part of the processed bamboo is not cut, it is not necessary to perform troublesome work such as cutting according to the insertion hole one by one, and the hard surface layer on the surface side can be used effectively, and the seat part and The strength against the load can be maintained by the connecting portion structure of the load support portion such as the backrest portion. Furthermore, since the connecting portion structure is configured such that the processed bamboo 20 is inserted into the insertion hole 32 of the elastic body 14 and the elastic body 18 is inserted into the hole 16 of the frame, special skills, tools, and complicated work are not required. As a result, chairs can be easily assembled even by ordinary people or at home. In addition, the natural resource bamboo can be used effectively to produce a comfortable chair with excellent design.

  In the above embodiment, the load supporting structure is in the form of a chair, but is not limited to a chair. For example, a bed, pillow, pedestal, shelf, or any other person or thing such as furniture or a building, etc. It may be a load support structure that supports

  The connection part structure of the processed bamboo and the load support structure using the processed bamboo of the present invention described above are not limited to the configuration of the above-described embodiment alone, but the essence of the present invention described in the claims. Any modification may be made without departing from the scope.

It is a perspective view of the chair which shows one Example of this invention. It is a disassembled perspective view of the chair of FIG. It is a top view of the chair of FIG. It is a side view of the chair of FIG. It is a rear view of the chair of FIG. It is a front view of the elastic body used for the connection part structure of the form of the chair of FIG. It is sectional drawing which shows the state which fitted the elastic body to the hole of the flame | frame. It is an expansion disassembled perspective view of the connection part structure of the chair of FIG. It is explanatory drawing of the vertically divided process bamboo.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Chair 12 Connection part structure 14 Frame 16 Hole 18 Elastic body 20 Processed bamboo 24 Seat part 26 Backrest part 32 Insertion hole 34 Cross-section arc-shaped part 36 Surface part

Claims (6)

A hole provided in each of the opposed portions of the frame of the load supporting structure including the load supporting portion;
An elastic body fitted into the hole in a close fitting manner and having an insertion hole inside;
A vertically-cut bamboo that is detachably attached to the insertion hole of the elastic body and is fitted in a close fitting manner,
For the insertion hole of the elastic body, the processed bamboo was used, characterized in that the end of the vertically split bamboo was inserted and the portion closely contacting the surface portion of the vertically split bamboo formed an arcuate section. Connection structure of load support structure.   The connection part structure of the load support structure using the processed bamboo according to claim 1, wherein the surface portion of the vertically-processed bamboo holds a non-cutting surface layer.   The connection structure of the load support structure using the processed bamboo according to claim 1 or 2, wherein the load support portion is a seat portion of a chair.   The connection part structure of the load support structure using the processed bamboo according to any one of claims 1 to 3, wherein the elastic body is a ring rubber.   The elastic body used for the connection part structure in any one of Claim 1 thru | or 4. The load support structure which has an elastic body used for the connection part structure using the processed bamboo in any one of Claim 1 thru | or 4, or the connection part structure of Claim 5.

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