JP2016016283A - Furniture and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: furniture which is manufactured by having metallic pipe members fitted with a resin cover, which is a resin cover fulfilling easy procedure on the metallic pipe members and low cost, securing excellent design and having less long-term deterioration; and a manufacturing method of the same.SOLUTION: A leg member 12 composing a table has a leg body 21 of a metallic pipe member and a resin cover 22 attached to an outer periphery thereof. The resin cover 22 is formed cylindrically by extrusion molding from a soft resin material which can swell by being soaked with volatile solvent and has grain patterns. Furthermore, an inner face of the resin cover 22 is in contact with an exterior surface of the leg body 21 over the entire circumferential range of the cover.SELECTED DRAWING: Figure 2

Description

  The present invention relates to furniture and a method for manufacturing the same.

  Pipe materials are sometimes used for furniture such as table legs. Various materials such as a wood material, a resin material, and a metal material are employed for the pipe material. Of these, metal pipe materials that are easier to secure strength than other materials are often used in furniture that requires a predetermined strength. In this case, generally, the surface of the metal pipe material is subjected to a treatment such as plating or painting.

  However, in the case of surface treatment such as plating or painting, there is a problem that the production cost increases if the color is inevitably changed, and if the color is changed or the color variations are made uniform. . Moreover, it is preferable to avoid as much as possible a plating process that may cause environmental pollution due to the treatment of waste liquid or the like.

  Therefore, instead of surface treatment such as plating or painting, a device has been proposed in which, for example, a resin cover as exemplified below is attached to a metal pipe material.

  As a first example, there is a resin cover having a substantially C-shaped cross section provided with a slit in the axial direction. This resin cover is resin-molded so as to exhibit a desired design and color such as wood grain, and is covered with a metal pipe material while widening the slit. Some have been proposed in which a hinge portion is provided to facilitate attachment and detachment (see, for example, Patent Document 1).

  As a second example, there is a resin sheet on which a desired pattern or color such as wood grain is printed. This resin sheet is affixed to the outer surface of the metal pipe material, and the metal pipe material can have a design.

JP 2007-325809 A

  However, regarding the first example, it is difficult to deal with variations in the thickness of the metal pipe material with one type of resin cover, and a metal pipe material that does not fit even when the resin cover is attached is generated. was there. If a resin cover is manufactured for each thickness type in order to avoid this, the manufacturing cost will increase. Moreover, even if the resin cover fits exactly on the metal pipe material, the slit extending in the axial direction is conspicuous and the design is impaired.

  Also regarding the second example, since the design of the resin sheet is a printed matter, there is no depth and a cheap image. In addition, the process of cutting with accurate dimensions so that the boundary of the resin sheet is not conspicuous and pasting it on the metal pipe material is a very laborious process and costs a lot. There is also concern about peeling. In particular, when metal pipe material is used for the legs of furniture such as tables and chairs, there is a risk that the resin sheet will be peeled off because the legs will hit the legs or a vacuum cleaner on a daily basis. large.

  Therefore, the present invention provides a resin cover that can be easily applied to a metal pipe material and can be manufactured at a low cost, and also has a good design and little deterioration over time, and the resin cover is attached to the metal pipe material. It aims to provide the furniture and its manufacturing method.

  In order to solve the above-mentioned problem, the invention described in claim 1 is provided with a metal pipe member provided with a resin cover on an outer peripheral portion, and the resin cover is a soft resin that can be swollen by infiltration of a volatile solvent. It is characterized by being formed into a cylindrical shape by a material and having a cover inner surface in contact with an outer surface of the metal pipe material over the entire circumferential direction.

  According to the first aspect of the present invention, since the resin cover is extruded using a soft resin material, the resin cover is extruded using a known method of appropriately mixing a plurality of resin materials and other additives. For example, it is possible to express various colors and designs including woodgrain designs. In this case, unlike what is printed on the sheet, it is possible to deepen the expression of those symbols, and there is no fear of peeling off from the cut line, so that deterioration over time is reduced.

  In addition, since the resin cover has no slits, the design of the color and design expressed on the resin cover is not impaired, and the original design of the resin cover can be secured. Furthermore, the resin cover of various variations matched to the thickness of the metal pipe material can be easily prepared by extrusion molding. For this reason, it is possible to just fit the resin cover to various types of metal pipe materials while suppressing an increase in cost.

  And the soft resin material which can swell by the penetration | invasion of a volatile solvent is used for the raw material of a resin cover. Therefore, if the resin cover is in its expanded (expanded) state, the resin cover is expanded and further flexibility is provided, and it becomes easy to insert the metal pipe material. Thereafter, if the volatile solvent is volatilized, the resin cover contracts and can be fitted to the metal pipe. In this way, it is possible to employ a manufacturing method in which the resin cover can be easily attached to the metal pipe material and the cost can be reduced.

  In invention of Claim 2, it has a leg part which supports a to-be-supported body from the floor surface in predetermined height in the said Claim 1, The said metal pipe material is used for this leg part. Features.

  In the invention according to claim 2, since the resin cover is provided on the metal pipe used for the leg portion of the furniture, the leg portion of the furniture that may cause a daily collision with a human foot or a vacuum cleaner is provided. It can protect and improve impact resistance.

  In addition, in the case of a resin cover that is produced by extrusion using a soft resin material, it can be molded into a thick state having a desired thickness, unlike a conventional resin sheet. Therefore, impact resistance can be improved without unnecessarily thickening the metal pipe material. In this way, the thickness can be maintained, so that it is suitable for furniture in which a metal pipe material is used for the legs.

  The thickness of the resin cover is preferably about 0.5 mm to 3 mm. If the wall thickness is made thinner than this, it will be easily broken and inferior in impact resistance and durability. Further, when the resin cover is attached to a metal pipe material in a state where a volatile solvent is contained in the resin cover, there is a problem that the resin cover is easily torn during the attaching operation. Furthermore, there is a problem that even if a pattern such as wood grain is expressed, the metal pipe material is transparent and the texture of the pattern does not appear, or it is easy to tear at the fine concave part that occurs when expressing the grain pattern .

  On the other hand, if the wall thickness is made thicker than this, the above-mentioned problem when it is too thin is improved, but the time required for the volatile solvent to be soaked into the resin cover is greatly increased. Problem arises. This is because when the thickness of the resin cover increases, the time for the volatile solvent to penetrate increases in a quadratic function (curve). In addition, it takes a considerable amount of time to volatilize the volatile solvent soaked over time after the resin cover is attached to the metal pipe material. For this reason, the thickness of about 3 mm is the limit in consideration of manufacturing efficiency and cost based on the immersion time and the volatilization time.

  And if considering various factors such as manufacturing efficiency, cost, impact resistance, durability, texture when expressing the pattern, the thickness of the resin cover is 1 mm especially in the range of 0.5 mm to 3 mm. It is even more preferable to set the thickness to ˜2 mm.

  According to a third aspect of the present invention, a first step of extruding a cylindrical resin cover made of a soft resin material that can be expanded by the penetration of a volatile solvent, and the resin cover is immersed in a volatile solvent. A second step of immersing the volatile solvent in the soft resin material, and a third step of covering the outer periphery of the metal pipe material with the resin cover in the state of immersing the volatile solvent, The volatile solvent is volatilized from the resin cover placed on the metal pipe material, thereby shrinking the resin cover and bringing the inner surface thereof into contact with the outer surface of the metal pipe material over the entire circumferential direction, A fourth step of attaching to the metal pipe member and a fifth step of assembling the metal pipe member attached with the resin cover as a part of furniture are provided.

  According to the invention described in claim 3, the furniture according to the invention described in claim 1 or 2 can be easily manufactured. In other words, in the production of a metal pipe with a resin cover, in order to insert the metal pipe material after infiltrating the volatile solvent soaked in the resin cover extruded according to the thickness of the metal pipe material, It can be easily inserted. Then, by volatilizing the volatile solvent from the resin cover in a state where the metal pipe material is inserted, the resin cover naturally contracts and can be fitted to the metal pipe material. In this way, the metal pipe member to which the resin cover is attached can be easily manufactured, so that it becomes easy to manufacture furniture using the metal pipe member.

  The soft resin material in each of the above inventions is preferably a polyvinyl chloride resin, but synthetic rubber such as silicon rubber, chloroprene, nitrile rubber, ethylene propylene diene rubber (EPDM), fluoro rubber, low density polyethylene, high density Polyolefin resins such as polyethylene, and other polyurethane resins can be used.

  In addition, as the volatile solvent in each of the above inventions, various organic solvents such as esters such as acetate ester, aromatic hydrocarbons such as toluene, ketones such as acetone, and cyclic ethers can be used. Among them, it is preferable to use esters from the viewpoint that the degree of toxicity of the solvent is low.

The perspective view which shows the table of this embodiment. The perspective view which expands and shows a part of leg part of a table. Explanatory drawing explaining the manufacturing process of the leg part with which the resin cover was mounted | worn.

  Hereinafter, an embodiment in which the present invention is embodied in a table used in an office or home and a manufacturing method thereof will be described with reference to the drawings.

  First, the table will be described with reference to FIG. 1 and FIG. FIG. 1 is a perspective view showing a part of the table 10, and FIG. 2 is an enlarged perspective view showing a part of the leg 12.

  As shown in FIG. 1, the table 10 includes a top plate 11 and four legs 12. The top plate 11 as a supported body is a single plate having a rectangular shape in plan view, and is configured such that the surface is made of wood using a wood material or a resin material.

  Each leg portion 12 is attached to the lower surface side of the top plate 11 at the four corners of the top plate 11 using screws or other appropriate methods. The top plate 11 is horizontally supported by the four legs 12 at a predetermined height from the floor surface.

  Each of the leg portions 12 has a leg main body 21 and a resin cover 22 as shown in FIG. The leg body 21 is a metal pipe member made of a metal such as aluminum or steel and having a circular cross section. The resin cover 22 is configured to be cylindrical with a polyvinyl chloride resin, which is a soft resin material, and the cover inner surface is attached to the leg main body 21 in contact with and in close contact with the outer surface of the leg main body 21 over the entire circumferential direction. Has been.

  A wood grain pattern is formed on the outer surface of the resin cover 22, and the thickness D is approximately 1.5 mm. The resin cover 22 is not subjected to surface treatment such as plating or painting, and remains in an extruded state as will be described later.

  Next, a method for manufacturing the table 10 having the leg portion 12 to which the resin cover 22 is attached will be described with reference to FIG. FIG. 3 is an explanatory diagram for explaining a manufacturing process of the leg portion 12 to which the resin cover 22 is attached.

  As shown in FIG. 3, first, an extrusion molding process as a first process for extrusion molding of the resin cover 22 is performed. In this extrusion molding process, an extruder 31 is used. By inserting several types of polyvinyl chloride resins into the extrusion molding machine 31 and performing extrusion molding while mixing them, the cylindrical member 23 having a woodgrain pattern can be obtained. The inner diameter of the cylindrical member 23 is set to be substantially the same as the outer diameter of the leg main body 21 to be mounted.

  After the cylindrical member 23 led out from the extruder 31 is subjected to necessary processing such as cooling, the cylindrical member 23 is cut in accordance with the length of the leg portion 12 to thereby form the resin cover 22. Is obtained.

  Next, a swelling process as a second process is performed. In this swelling process, the resin cover 22 obtained in the extrusion process is immersed in an impregnation basket 32 filled with an organic solvent, which is a volatile solvent, under predetermined conditions such as temperature, pressure, and time. Swell. In this embodiment, an organic solvent containing an acetate ester is used as the volatile solvent, and other organic solvents to be used are appropriately selected so that the soaking time is about several hours, and various solvents such as temperature and pressure are used. Conditions are set. And by this immersion, the polyvinyl chloride resin which is the material of the resin cover 22 absorbs the acetate ester and swells, and the inner diameter of the resin cover 22 is expanded more than the original inner diameter, and further flexibility is increased. To have.

  Subsequently, a cover mounting process as a third process is performed. In this cover mounting step, the leg main body 21 that is a metal pipe material is inserted into the resin cover 22 that has been swollen by the swelling step, and the resin cover 22 is mounted on the outer periphery of the leg main body 21. If the inner diameter of the resin cover 22 is substantially the same as the outer diameter of the leg main body 21, it is difficult to mount the resin cover 22. However, since the resin cover 22 has a larger inner diameter due to swelling and increased flexibility, Installation is smooth and easy.

  Subsequently, a solvent volatilization process as a fourth process is performed. In the solvent volatilization process, the leg body 21 to which the resin cover 22 is mounted in the cover mounting process is dried over a predetermined time. In this embodiment, forced drying is performed in a heated atmosphere, and the time required for the solvent volatilization step is about 1 to 2 hours. By this drying, acetate ester absorbed in the vinyl chloride resin that is the material of the resin cover 22 is volatilized, so that the resin cover 22 returns to its original state even when contracted. That is, the inner diameter of the resin cover 22 is substantially the same as that of the leg main body 21, and is in close contact with the outer surface of the leg main body 21. Thereby, the leg main body 21 with the resin cover 22 mounted on the outer peripheral portion is obtained.

  Then, in the subsequent assembling step as the fifth step, the leg portion 12 obtained through the above steps is assembled to the top plate 11 as one part of the table 10. Thereby, the table 10 provided with the leg part 12 with the resin cover 22 is obtained.

  As described above, the following excellent effects can be obtained by the method of manufacturing the table 10 having the legs 12 to which the resin cover 22 is attached and the steps of swelling and volatilizing the resin cover 22.

  Since each leg portion 12 of the table 10 can collide with a human body (such as a foot) or a vacuum cleaner on a daily basis, a resin cover 22 is provided on the leg body 21 made of a metal pipe material. The impact resistance of the leg body 21 can be improved. In this case, the resin cover 22 is made of a soft resin material, and can be formed into a thickness having a predetermined thickness, unlike being protected by a resin sheet. For this reason, impact resistance can be improved, avoiding making the leg main body 21 uselessly thick.

  In particular, the resin cover 22 has a thickness D of approximately 1.5 mm, and is set within a range of 1 mm to 2 mm, which is a more preferable range for the thickness D. As a result, problems such as impact resistance and durability when the wall thickness D is too thin, as well as problems with manufacturing efficiency and cost when the wall thickness D is too thick, are improved and are practical. ing.

  The resin cover 22 is extruded by a soft resin material. Therefore, a woodgrain pattern can be expressed by extrusion molding by a known method in which several kinds of resin materials are mixed. Thereby, unlike what was printed on the resin sheet, the expression of the woodgrain pattern can be deepened, and there is no worry that the sheet will be peeled off from the cut line, and the deterioration over time is reduced.

  Moreover, the resin cover 22 is manufactured in a cylindrical shape by extrusion molding, and is not provided with a slit. Thereby, the design property of the color and the pattern expressed on the resin cover 22 is not impaired by the slit, and the original design property of the cover can be secured.

  Furthermore, it becomes easy to arrange the resin cover 22 of various variations according to the thickness of the leg main body 21 by extrusion molding. Thereby, even when the dimensions of the leg main body 21 are different depending on the type of the table 10, the resin cover 22 can be formed for each leg main body 21 having a different dimension. For this reason, the resin cover 22 can be just-fit to the leg body 21 while suppressing an increase in cost.

  As the material of the resin cover 22, a polyvinyl chloride resin that can be swollen by penetration of a volatile organic solvent made of acetate is used. Therefore, the resin cover 22 is subjected to a swelling process in which the resin cover 22 is swollen with an organic solvent, a cover mounting process in which the swollen resin cover 22 is mounted on the leg body 21, and a solvent volatilization process in which the organic solvent is volatilized. 22 is attached to the leg body 21. Thereby, the troublesome thing like the case where a resin sheet is stuck is unnecessary, and the resin cover 22 can be easily attached to the leg main body 21. As a result, the table 10 having the legs 12 with the resin cover 22 can be easily manufactured.

  It should be noted that the present invention is not limited to the embodiment described above, and may be implemented in the form shown as another example below.

  (1) In the above-described embodiment, the top plate 11 is configured to have a woody tone using a wood material or a resin material, but a metal material, a glass material, or the like may be used, or these various materials may be combined. The top plate 11 may be configured. Moreover, the shape of the top plate 11 is not limited to a quadrangular shape in plan view, and may be a circular shape, an elliptical shape, a polygonal shape such as a triangle, or the like. Instead of the top plate 11 having a single plate shape as shown in FIG. 1, a top plate having a plurality of stages may be used.

  In addition, the leg main body 21 may have an oval shape or a square shape such as a triangular shape or a quadrangular shape in cross section. The same applies to the resin cover 22, and the resin cover 22 may have an elliptical cylindrical shape or a rectangular cylindrical shape instead of a cylindrical shape.

  (2) In the above embodiment, the resin cover 22 represents a woodgrain pattern, but it may represent a pattern other than a wood pattern such as a stone pattern or a geometric pattern. May be attached. Even in that case, since the resin cover 22 is manufactured by extrusion molding using a resin as a raw material, various types of colors and designs can be expressed.

  Further, the resin cover 22 may be provided with functions such as gloss and antibacterial properties as well as a woodgrain pattern. In that case, in the extrusion molding process, in addition to the polyvinyl chloride resin, various additives for adding functions are put into the extrusion molding machine 31 together.

  (3) In the above embodiment, the leg portion 12 of the table 10 has the leg main body 21 made of a metal pipe material, and the resin cover 22 is attached thereto. A metal pipe material may be used for parts other than the leg part 12. Even in such a case, the resin cover 22 may be attached to a metal pipe material other than the leg portion 12.

  (4) In the above embodiment, the cylindrical member 23 led out from the extruder 31 is cut to obtain the resin cover 22, and then the manufacturing method for swelling the resin cover 22 is employed. The resin cover 22 may be obtained by making the resin cover 22 cut after swelling.

  (5) In the above embodiment, in the solvent volatilization step, the leg main body 21 to which the resin cover 22 in the swollen state is attached is forcibly dried in a heated atmosphere to volatilize the organic solvent. Other volatilization conditions, such as leaving in, may be employed.

  (6) Although the said embodiment demonstrated as a case where this invention was applied to the table 10, you may apply to furniture other than the table 10, such as a chair and storage furniture. For example, in the case of a chair, there are those where a metal pipe material is used for a part of the seat part, the backrest part, and the leg part, and the storage furniture such as a bag or a shelf is provided with a hanger or a handle made of the metal pipe material. There is something. In addition, metal pipe materials may be used for sofa legs, bed legs, handrails, doors, partitions, and the like, and various types of furniture use metal pipe materials. Even with such furniture, the resin cover 22 can be mounted as in the above embodiment. In the case of a chair, the seat corresponds to the supported body.

  DESCRIPTION OF SYMBOLS 10 ... Table (furniture), 11 ... Top plate (supported body), 12 ... Leg part, 21 ... Leg main body (metal pipe material), 22 ... Resin cover.

Claims (3)

Provided with a metal pipe material with a resin cover on the outer periphery,
The resin cover is formed into a cylindrical shape by a soft resin material that can be swollen by infiltration of a volatile solvent, and the cover inner surface is in contact with the outer surface of the metal pipe material over the entire circumferential direction. Furniture characterized by being.   The furniture according to claim 1, further comprising: a leg portion that supports the supported body at a predetermined height from the floor surface, wherein the metal pipe material is used for the leg portion. A first step of extruding a cylindrical resin cover made of a soft resin material that can be swollen by infiltration of a volatile solvent;
A second step of immersing the resin cover in a volatile solvent and immersing the volatile solvent in the soft resin material;
A third step of covering the outer periphery of the metal pipe material with the resin cover in a state in which the volatile solvent is immersed;
The volatile solvent is volatilized from the resin cover placed on the metal pipe material, thereby shrinking the resin cover and bringing the inner surface thereof into contact with the outer surface of the metal pipe material over the entire circumferential direction, A fourth step of attaching to the metal pipe material;
A fifth step of assembling the metal pipe member to which the resin cover is attached as one part of furniture;
A method for producing furniture, comprising:

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