JP4713238B2 - Leg structure of structure - Google Patents

Description

  The present invention relates to a leg structure formed at the bottom of a synthetic resin structure. More specifically, the leg part structure of the structure that supports the first leg part in which the concave and convex conical cylinder part on the structure side is formed by inserting the first leg part into the second leg part on the placement surface side. About.

  Generally, leg members are provided on the bottom surface of a structure such as a bathtub or a waterproof pan. This leg member is provided integrally or separately on the bottom surface portion of the structure, and has a substantially inverted conical cylindrical shape or cylindrical shape in many cases. As an example, there is known a support structure for a waterproof pan provided with a support leg body having a hat-shaped inverted conical cylinder base and having reinforcing ribs formed on the outer peripheral side surface (see, for example, Patent Document 1).

On the other hand, various structures are required to be reduced in weight for ease of transportation, carrying and assembly, energy saving when transported by a truck, etc., and transport cost reduction. The demand for weight reduction is not an exception to the legs of the structure as well as the legs provided at the bottom of the structure. ing. However, when the legs are made thin, there is a problem that the rigidity of the legs is lowered, for example, the buckling strength is lowered. That is, there is a possibility that deformation such as buckling deformation may occur when a load such as its own weight is applied to the legs. Therefore, there has been a demand for a leg structure that does not cause a decrease in rigidity even if the leg is thinned to reduce the weight. The technique of Patent Document 1 described above is intended to solve such problems, but is still insufficient and there is room for improvement.
Japanese Patent No. 3349291

The present invention has been made to solve the above-described problems in the prior art, and achieves the following object.
The object of the present invention is to reduce the thickness of the legs of the structure to reduce the weight and to prevent the legs of the structure from being deteriorated in rigidity, buckling strength, etc. despite being thin. To provide a structure.

In order to solve the above problems, the following measures are taken.
The leg structure of the structure of the present invention 1 is
A leg portion structure of a structure formed of synthetic resin, provided on the bottom surface side of the structure, and having a conical shape in which an outer peripheral diameter decreases from one side toward the other side, and is thick Is provided on the mounting surface side on which the structure is placed, and is provided from the one side to the other side. A second leg portion formed with a second conical tube portion whose inner peripheral diameter decreases toward the inner periphery, and the first conical tube portion is thin-walled, It is a conical cylindrical surface formed so as to be an uneven surface that is uneven at every predetermined angle around the axis of the first leg, and the first conical cylindrical portion is supporting and inserted telescopically into the second conical tube portion, said second conical tube portion, the wall thickness is a thin-walled, the second leg An inner ring portion of the second conical cylindrical portion is formed in a concave and convex outer surface that is recessed from the outer ring portion of the first conical cylindrical portion, and is formed to be a concave and convex surface that is concave and convex at every predetermined angle around the axis. It is inserted so that the convex inner ring | wheel part which protruded more may be located .

The leg structure of the structure of the present invention 2 is the present invention 1,
The first leg is formed integrally with the structure.

The leg structure of the structure of the third aspect of the present invention is the first aspect of the present invention.
The first leg is formed separately from the structure and is fixed to the structure with a fixing member.

The leg structure of the structure of the present invention 4 is the present invention 1,
The conical cylindrical surface formed on the concavo-convex surface includes an outer ring arc wall portion that forms an outer ring portion (13) for each predetermined angle in a direction around the axis of the first leg portion, and the outer ring arc wall portion. And a concave outer ring arc wall part that forms a concave outer ring part (14) having a smaller diameter than the outer ring part (13), and the outer ring arc wall part and the concave outer ring arc wall part are continuous. It consists of the planar wall part (15) connected so that it is characterized by the above-mentioned.

The leg structure of the structure of the fifth aspect of the present invention is the first to fourth aspects of the present invention.
The structure is a bathtub or a waterproof pan.

According to the leg part structure of the structure of the present invention, even if the leg part is reduced in weight, the leg part is not lowered in rigidity. Even if the leg portion is formed of a thin tube portion, the rigidity of the leg portion such as buckling strength is not lowered. That is, an uneven surface is formed on the tube portion around the axial direction of the leg portion, and the rigidity is not lowered.
In addition, the structure in which the weight of the leg portion is reduced can be easily transported, carried, assembled, etc., and the productivity is improved. Furthermore, energy saving during transportation and reduction of transportation costs can be achieved. Furthermore, since it is only necessary to form a thin leg portion having irregularities, the injection molding process is easy and the productivity is improved.

An embodiment of a leg structure of a structure according to the present invention will be described with reference to the drawings.
1 is an overall view of a structure provided with a leg structure of the present invention, FIG. 2 is an enlarged cross-sectional view of FIG. 1 cut along line AA, and FIG. 3 is FIG. 2 taken along line BB. FIG. 4 is a partial perspective view showing the cylindrical portion of the first leg portion, and FIG. 5 is an explanatory diagram for explaining that the leg portion structure of the structure of the present invention is highly rigid. It is. In the description of this embodiment, a bathtub is taken as an example of the structure, but the present invention is not limited to this. For example, it is needless to say that a structure such as a waterproof pan or various containers, in other words, a structure that is placed on a placement surface and provided with legs.

  As shown in FIG. 1, a bathroom 50 such as a unit bath is composed of a bathtub 51, a wash basin side waterproof pan 52, a bathtub side waterproof pan 53, an apron 54, and the like. On the bathroom floor 55 of the bathroom 50, a bathtub-side waterproof pan 53 and a wash-basin waterproof pan 52 are placed. On the upper surface (mounting surface) of the bathtub-side waterproof pan 53, the bathtub 51 is mounted. Between the bathtub 51 and the bathtub-side waterproof pan 53, the leg portion 1 of the present embodiment is provided. The bathtub 51, the wash basin side waterproof pan 52, the bathtub side waterproof pan 53, the apron 54, and the like are injection-molded with a thermoplastic synthetic resin or the like. This synthetic resin is, for example, ABS (acrylonitrile butadiene styrene) resin, polycarbonate (PC), polypyrovylene (PP), polybutylene terephthalate (PBT), polyamide (PA) resin, phenol resin, FRP (fiber reinforced plastic), etc. It is. It is preferable that the bathtub 51, the wash basin side waterproof pan 52, the bathtub side waterproof pan 53, and the like of this embodiment are formed of FRP.

  As shown in FIG. 2, the leg part 1 is comprised from the 1st leg part 10 formed in the bottom part 51a side of the bathtub 51, and the 2nd leg part 20 provided in the bathtub side waterproofing pan 53 side. ing. In this embodiment, the first leg portion 10 is formed integrally with the bottom portion 51a, but may be formed separately and integrated with a fixing member such as a bolt. Although the 2nd leg part 20 is also integrally provided in the bathtub side waterproofing pan, what was shape | molded separately and fixed by fixing members, such as a volt | bolt, may be integrated.

The first leg portion 10 is formed in a conical shape and a thin shape in which the diameter of the outer peripheral portion decreases from the upper side (one side) to the lower side (the other side) in FIG. The conical tube portion (hereinafter referred to as the first tube portion) 11 and the bottom portion 12 are configured. As shown in FIGS. 3 and 4, the first cylindrical portion 11 includes an outer ring arc wall portion that forms the outer ring portion 13 and a concave outer ring that forms a concave outer ring portion 14 that is recessed from the outer ring portion 13 at a predetermined angle. The arc wall portion and the flat wall portion 15 connected so that the outer ring arc wall portion and the concave outer ring arc wall portion are formed in a continuous shape. The planar wall portion 15 is a plane that is substantially parallel to a straight line connecting a position in the middle of the arc portion of the concave outer ring portion 14 and the center of the first leg portion 10 in plan view. The concave outer ring portion 14 and the outer ring portion 13 are formed so as to be an uneven surface alternately. That is, the first cylinder portion 11 has a concavity and convexity surface at every predetermined angle in a plan view, and a cone formed in a tapered shape such that the diameter becomes smaller toward the lower side in the axial direction of the leg portion. It has a cylindrical surface.
That is, the 1st cylinder part 11 becomes a shape as shown in the perspective view of FIG.

In this embodiment, the concave outer ring portion 14 that is recessed from the outer ring portion 13 is formed at the four positions. However, the present invention is not limited to this. For example, what is necessary is just to have a concave outer ring portion formed in three or more positions on the first tube portion. The concave outer ring portions are preferably formed at the same angle, but may be formed at different angular positions. In that case, it is necessary to form a convex inner ring part at a different angular position in the tube part of the second leg part to be described later.
Furthermore, although the outer ring part 13 and the concave outer ring part 14 of the first cylinder part 11 are described as circular arcs that are part of a circle in plan view, the present invention is not limited to this. For example, the outer ring portion and the concave outer ring portion may have an arc shape that is a part of a closed curve such as an oval shape, an oval shape, or an egg shell shape in plan view. That is, the cones in this description include those whose shape in plan view is the shape of the closed curve described above. In that case, the shape of the second leg portion, which will be described later, also needs to be the same shape in plan view.
In addition, the first leg portion is illustrated with a diameter dimension and an axial dimension that are not significantly different from each other, but the axial dimension may be larger than the diameter dimension. For example, the axial dimension may be several times larger than the diameter dimension. Further, the cone in this embodiment includes a cone having a small angle (taper) that is about the draft of the forming process.

  The second leg portion 20 includes a ring-shaped inner wall portion 21, a ring-shaped outer wall portion 22 formed on the outside of the inner wall portion 21, and an upper surface portion 23. That is, the inner wall portion 21 and the outer wall portion 22 have a double wall structure. The inner wall portion 21 is a conical cylindrical surface having an uneven surface formed in the direction around the axis of the second leg portion 20 so as to correspond to the first cylindrical portion 11. That is, the inner wall portion 21 includes an inner ring arc wall portion forming the inner ring portion 24 and a convex inner ring arc wall portion forming a convex inner ring portion 25 protruding (protruding) from the inner ring portion 24 at a predetermined angle. And an inner ring arc wall part and a convex inner ring arc wall part connected to each other so as to have a continuous shape. The planar wall portion 26 is a plane parallel to the planar wall portion 15.

The outer ring portion 13 corresponds to the inner ring portion 24, the concave outer ring portion 14 corresponds to the convex inner ring portion 25, and the first leg portion 10 can be inserted into the second leg portion 20.
The planar wall portion 15 acts to prevent the first tube portion 11 from being buckled and deformed when a buckling load is applied to the first tube portion 11 from the axial direction. That is, as shown in FIG. 5, when a load F is applied to the first leg portion 10 from above, for example, the concave outer ring portion 14 may be buckled and deformed as shown by the two-dot chain line in FIG. There is. However, in that case, the flat wall portion 15 must be deformed like the shape indicated by the two-dot chain line in FIG. That is, the rigidity for preventing buckling deformation is high. Further, the planar wall portion 15 has a double wall structure in a symmetrical position with respect to a straight line that connects a substantially middle position of the second arc portion and the center of the leg portion, and has rigidity for preventing deformation. Is high.
Further, since the first leg portion 10 and the second leg portion 20 are inserted in a nested manner, a highly rigid leg portion structure that is unlikely to buckle and deform even when a load such as compression or bending is applied. can do.

  In this embodiment, it is described that the inner wall 21 is also formed on the conical cylindrical surface on which the concave and convex surfaces are formed on the second leg 20 side, but the inner wall and the outer wall are separated from each other. When it can be formed into a highly rigid shape, such as a double wall structure having, the uneven surface is not necessarily required, and it may be a second leg portion having an inner wall portion in which a conical hole is formed. .

The bathtub 51 provided with the first leg 10 and the bathtub-side waterproof pan 53 provided with the second leg 20 can be easily manufactured by injection molding or the like conventionally performed. Now, detailed description of the manufacturing process is omitted.
A method for assembling the leg structure of the structure according to the present embodiment will be described.
The bathtub 51 provided with the leg portion 1 inserts the outer peripheral portion of the first leg portion 10 into the inner peripheral portion of the second leg portion 20 on the bathtub-side waterproof pan 53 side. At this time, the outer ring portion 13 corresponds to the inner ring portion 24, the concave outer ring portion 14 corresponds to the convex inner ring portion 25, and the first leg portion 10 can be inserted into the second leg portion 20. And it is good to assemble so that the outer peripheral surface of the 1st cylinder part 11 and the inner peripheral surface of the inner wall part 21 may contact | abut, and the upper surface part 23 and the bottom part 51a may contact | abut. Since the bathtub 51 and the 1st leg part 10 are manufactured lightweight, an assembly operation can be performed easily.

Based on FIG. 6, another embodiment of the leg structure of the structure will be described.
FIG. 6 shows a leg structure according to another embodiment of the present invention, and is a cross-sectional view corresponding to FIG. That is, it corresponds to an enlarged cross-sectional view of FIG. 1 cut along line AA.
In the above-described embodiment, the structure (tub) is described with the first leg integrally formed, but in the other embodiments, the structure and the first leg are provided. It is formed separately and fixed with a fixing member such as a bolt or an adhesive.
By doing in this way, it becomes possible to shape | mold a structure and a 1st leg part with the material of a different synthetic resin.

  Leg part 1A of this other embodiment is provided between bathtub 51 and bathtub side waterproofing pan 53a. An attachment portion 51 c is formed on the bottom 51 b of the bathtub 51. The first leg portion 30 is attached to the attachment portion 51c with a bolt 39. The bolt 39 is screwed into a screw hole formed in the attachment portion 51c, and fixes the flange portion 38 to the bottom portion 51b via a washer or the like. The first leg portion 30 includes an upper flange portion 38, a cylindrical portion 31 having a conical cylindrical surface having an uneven surface, and a bottom portion 32. That is, the cylindrical part 31 also has a shape as shown in the perspective view of FIG. The 2nd leg part 40 has the ring-shaped wall part 41 in which the conical cylinder surface which has an uneven surface was formed. That is, the lower part of the cylindrical portion 31 of the first leg 30 is inserted into and supported by the ring-shaped wall 41 of the second leg 40. By doing in this way, shaping | molding of the bathtub side waterproof pan becomes easy, and weight reduction can be achieved. In this other embodiment, the second leg portion 40 supports only the lower portion of the first leg portion 30 by inserting it in a nested manner. And it is good to assemble so that the outer peripheral surface of the 1st cylinder part 31 and the internal peripheral surface of the ring-shaped wall part 41 may contact | abut, and the bottom part 32 and the bathtub side waterproof pan 53a may contact | abut.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. Needless to say, modifications can be made without departing from the scope and spirit of the present invention.

FIG. 1 is an overall view of a structure provided with a leg structure according to the present invention. 2 is an enlarged cross-sectional view of the leg structure taken along line AA in FIG. FIG. 3 is a cross-sectional view of FIG. 2 taken along line BB. FIG. 4 is a partial perspective view showing the tube portion of the first leg portion. FIG. 5 is an explanatory diagram for explaining that the leg structure of the structure of the present invention is highly rigid. FIG. 6 shows a leg structure according to another embodiment of the present invention, and is a cross-sectional view corresponding to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Leg part 10, 30 ... 1st leg part 11, 31 ... 1st conical cylinder part 12, 32 ... Bottom part 13 ... Outer ring part 14 ... Concave outer ring part 15 ... Planar wall part 20, 40 ... 2nd Leg part 21 ... Inner wall part 22 ... Outer wall part 23 ... Upper surface part 24 ... Inner ring part 25 ... Convex inner ring part 26 ... Planar wall part 38 ... Gutter part 39 ... Fixing member (bolt)
41 ... Ring-shaped wall part 50 ... Bathroom 51 ... Bathtub 52 ... Washing-side waterproof pan 53 ... Bath-side waterproof pan 54 ... Apron 55 ... Bathroom floor

Claims (5)

A leg structure (1) of a structure molded of synthetic resin,
A first conical cylindrical portion that is provided on the bottom surface side of the structure (51) and has a conical shape in which an outer peripheral diameter decreases from one side toward the other side and has a thin wall thickness. Formed first legs (10, 30);
A second conical cylindrical portion is provided on the placement surface side on which the structure (51) is placed, and the inner peripheral diameter decreases from the one side toward the other side. The second leg (20, 40),
The first conical tube portion has a thin wall shape, and is formed so as to be an uneven surface that is uneven at every predetermined angle around the axis of the first leg portion. It is the one that is
The first conical tube portion is inserted into the second conical tube portion in a nested manner to support it,
The second conical cylindrical portion has a thin wall shape, and is formed to be an uneven surface that is uneven at every predetermined angle around the axis of the second leg portion. The convex inner ring portion (25) protruding from the inner ring portion (24) of the second conical cylindrical portion is positioned in the concave outer ring portion (14) recessed from the outer ring portion (13) of the conical cylindrical portion. A leg structure of a structure , which is inserted . The leg structure of the structure according to claim 1,
The first leg is formed integrally with the structure. A leg structure of the structure. The leg structure of the structure according to claim 1,
The first leg portion is formed separately from the structure and is fixed to the structure with a fixing member. The leg structure of the structure according to claim 1,
The conical cylindrical surface formed on the concavo-convex surface includes an outer ring arc wall portion that forms an outer ring portion (13) for each predetermined angle in a direction around the axis of the first leg portion, and the outer ring arc wall portion. And a concave outer ring arc wall part that forms a concave outer ring part (14) having a smaller diameter than the outer ring part (13), and the outer ring arc wall part and the concave outer ring arc wall part are continuous. A leg portion structure of a structure, characterized in that it is composed of planar wall portions (15) connected in the manner described above. A leg structure of the structure according to any one of claims 1 to 4 ,
The said structure is a bathtub or a waterproof pan. The leg part structure of the structure characterized by the above-mentioned.

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