Cylindrical groove

Abstract

To provide a cylindrical groove capable of facilitating the bending of a cylindrical water channel in which convex portions and concave portions are alternately formed like a flexible cylindrical portion.SOLUTION: A cylindrical groove 100 includes a bellows portion 110 including a bottom portion 101, a left side wall 102, a right side wall 103, and an upper surface portion 104. The bellows portion 110 is formed by alternately repeating mountain-folded convex portions 111 that protrudes in a chevron shape toward the outside of the cylindrical groove 100 and valley-folded concave portions 112 that protrudes in a chevron shape toward the inside of the cylindrical groove 100. In this case, the bellows portion 110 is formed so that the wall thickness t111 of the convex portion 111 is thinner than the wall thickness t112 of the concave portion 112. Further, each of the convex portion 111 and the concave portion 112 is formed so that the tip portion thereof is formed of a curved surface and the curvature C112 of the tip portion of the concave portion 112 is smaller than the curvature C111 of the tip portion of the convex portion 111.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cylindrical groove made of resin and having a bottom through which water flows, two side walls rising from both widthwise ends of the bottom, and an upper surface facing the bottom and covering the bottom. [Background technology]

[0002] There have been conventional joints for connecting two adjacent U-shaped gutters. For example, Patent Document 1 below discloses a resin joint having a flexible cylindrical portion (cylindrical waterway) composed of a bottom portion through which water flows, two side walls rising from both ends of the bottom in the width direction, and an upper surface portion facing the bottom and covering the bottom. In this case, the flexible cylindrical portion is formed in a shape in which rectangular protruding peaks and rectangular recessed valleys are alternately repeated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-360181

[0004] However, in the U-shaped groove described in Patent Document 1, the peaks and valleys that make up the flexible tubular portion are each formed into a rectangular shape, making it easier to bend uniformly, but there is a problem in that the increased rigidity requires a large force to bend it, making it difficult to bend.

[0005] The present invention has been made to address the above-mentioned problems, and its purpose is to provide a cylindrical groove that makes it easier to curve a cylindrical waterway in which convex and concave portions are formed alternately, such as a flexible cylindrical portion. Summary of the Invention

[0006] In order to achieve the above object, the present invention is characterized by a cylindrical channel formed in a cylindrical shape with a bottom through which water flows, two side walls rising from both ends of the bottom in the width direction, and an upper surface facing the bottom and covering the bottom, and a cylindrical groove made of resin in which bellows-like bellows portions are formed, in which convex portions that protrude outward and concave portions that are concave inward relative to the convex portions are alternately repeated, and one of the convex portions and concave portions of the bellows portion is formed to be thinner than the other. The protrusions and recesses are formed in a sharp shape toward their respective tips. The reason is that

[0007] According to the feature of the present invention configured as described above, the cylindrical groove is formed so that one of the convex portion and the concave portion in the bellows portion is thinner than the other, so that it can be easily deformed while suppressing excessive deformation, and as a result, it can be easily curved. In this case, it is preferable that the bellows portion is formed so that the thickness continuously decreases from one of the convex portion and the concave portion to the other. Also, According to the feature of the present invention configured in this manner, the cylindrical grooves are formed in a sharp-pointed shape toward the respective tip ends of the convex and concave portions in the bellows portion, making them easier to deform than when they are formed in a rectangular shape.

[0008] Another feature of the present invention is that in the cylindrical groove, the bellows portion has a convex portion and a concave portion, each of whose tip ends is formed with a curved surface, and the curvature of the tip end of the concave portion is smaller than that of the tip end of the convex portion.

[0009] According to the features of the present invention configured in this manner, the cylindrical groove has each of the tip ends of the convex and concave portions in the bellows portion formed as a curved surface, and the curvature of the tip end of the concave portion is smaller than that of the tip end of the convex portion. This increases the width and internal space of the concave portion, thereby improving the filling accuracy and efficiency of the filling material such as soil or concrete when burying the cylindrical groove, and also making maintenance work easier.

[0010] In order to achieve the above object, the present invention is characterized by a cylindrical channel formed in a cylindrical shape with a bottom through which water flows, two side walls rising from both ends of the bottom in the width direction, and an upper surface facing the bottom and covering the bottom, and a cylindrical groove made of resin in which bellows-like bellows portions are formed, in which convex portions that protrude outward and concave portions that are concave inward relative to the convex portions are alternately repeated, and one of the convex portions and concave portions of the bellows portion is formed to be thinner than the other. The upper surface of the upper surface is formed in a mountain shape such that the central portion of the upper surface in the width direction protrudes upward relative to both ends in the width direction. The reason is that.

[0011] According to the feature of the present invention configured as described above, the cylindrical groove is formed so that one of the convex portion and the concave portion in the bellows portion is thinner than the other, so that it can be easily deformed while suppressing excessive deformation, and as a result, it can be easily curved. In this case, it is preferable that the bellows portion is formed so that the thickness continuously decreases from one of the convex portion and the concave portion to the other. Also, According to the features of the present invention configured in this manner, the cylindrical groove is formed in a mountain-like shape in which the central part of the upper surface in the width direction of the upper surface of the bellows portion protrudes upward relative to both ends in the width direction, thereby improving the resistance to heavy objects such as soil, sand, or snow.

[0012] In order to achieve the above object, the present invention is characterized by a cylindrical channel formed in a cylindrical shape with a bottom through which water flows, two side walls rising from both ends of the bottom in the width direction, and an upper surface facing the bottom and covering the bottom, and a cylindrical groove made of resin in which bellows-like bellows portions are formed, in which convex portions that protrude outward and concave portions that are concave inward relative to the convex portions are alternately repeated, and one of the convex portions and concave portions of the bellows portion is formed to be thinner than the other. The bottom central portion in the width direction of the bottom is formed in a valley shape that protrudes downward relative to both ends in the width direction. The reason is that.

[0013] According to the feature of the present invention configured as described above, the cylindrical groove is formed so that one of the convex portion and the concave portion in the bellows portion is thinner than the other, so that it can be easily deformed while suppressing excessive deformation, and as a result, it can be easily curved. In this case, it is preferable that the bellows portion is formed so that the thickness continuously decreases from one of the convex portion and the concave portion to the other. Also, According to the features of the present invention configured in this manner, the cylindrical groove is formed in a valley shape in which the center of the bottom widthwise at the bottom of the bellows portion protrudes downward relative to both widthwise ends, thereby suppressing deviation in the widthwise position or posture of the cylindrical groove when it is buried in soil or concrete, thereby improving stability.

[0014] Another feature of the present invention is that in the cylindrical groove, the bellows portion is formed such that the recessed portion is thicker than the protruding portion.

[0015] According to the features of the present invention configured in this manner, the cylindrical groove has a recessed portion that protrudes inward within the cylindrical groove and is thicker than the protruding portion, thereby improving durability against contact with water flowing within the cylindrical groove and foreign matter contained in this water flow.

[0016] Another feature of the present invention is that in the cylindrical groove, the bellows portion is formed so that the thickness continuously decreases from one of the convex portion and the concave portion to the other. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing the outline of the external configuration of a cylindrical groove according to an embodiment of the present invention; [Figure 2] 2 is a cross-sectional view of the bellows portion in the cylindrical trench shown in FIG. 1 with the lower half of the bellows portion buried in the ground. [Figure 3] 2 is a partially enlarged cross-sectional view of a bellows portion in the cylindrical groove shown in FIG. 1. FIG. [Figure 4]4(A) and (B) show the state in which the bellows portion shown in FIG. 3 is bent, where (A) is a partially enlarged cross-sectional view showing the state in which the bellows portion is bent convexly, and (B) is a partially enlarged cross-sectional view showing the state in which the bellows portion is bent concavely. DETAILED DESCRIPTION OF THE INVENTION

[0019] An embodiment of a cylindrical groove according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the outline of the external configuration of a cylindrical groove 100 according to the present invention. Note that the drawings referred to in this specification are schematic, with some components exaggerated to facilitate understanding of the present invention. Therefore, the dimensions and ratios between the components may differ. This cylindrical groove 100 is a joint that is placed between two U-shaped grooves (not shown) that have a U-shaped cross section and connects these U-shaped grooves to each other.

[0020] (Configuration of cylindrical groove 100) Cylindrical groove 100 is made of a resin material such as polyethylene, and is mainly formed integrally with bottom 101, left side wall 102, right side wall 103, and top surface 104. In this case, the resin material constituting cylindrical groove 100 may be, in addition to polyethylene, hard synthetic resins such as polyvinyl chloride, polypropylene, polyethylene terephthalate, and polyamide, or fiber-reinforced resins made by adding glass fiber, carbon fiber, or organic fiber to resin materials such as unsaturated polyester.

[0021] The bottom 101 is a portion that supports water (not shown) flowing inside the cylindrical groove 100 from below, and is composed of a plate-like plate that extends in a band shape in the horizontal direction. In this case, as shown in Figure 2, the bottom 101 is formed in a valley shape with a bottom center portion 101a in the width direction of the bottom 101 projecting downward.

[0022] The left side wall 102 and the right side wall 103 are portions that support the water flowing inside the cylindrical groove 100 from the left and right sides, and are formed as walls that stand upright from both ends of the cylindrical groove 100 in the width direction at the bottom 101. In this case, the left side wall 102 and the right side wall 103 are formed to a height that is equal to or greater than the height of the water flowing inside the cylindrical groove 100 (i.e., the water level). In this case, the corners of the left side wall 102 and the right side wall 103 between them and the bottom 101 are formed by curved surfaces that maintain a bellows shape, which will be described later.

[0023] The top surface portion 104 faces a portion of the bottom portion 101 and covers the same portion, and is composed of a plate-like plate extending parallel to the bottom portion 101. The top surface portion 104 is formed in a state of being bridged between the left side wall 102 and the right side wall 103. In this case, as shown in FIG. 2, the top surface portion 104 has a mountain-like shape in which a central portion 104a of the top surface in the width direction of the top surface portion 104 protrudes upward. In addition, the corners of the top surface portion 104 between the left side wall 102 and the right side wall 103 are composed of curved surfaces that maintain a bellows shape, which will be described later.

[0024] A bellows portion 110 and connecting portions 120a, 120b are formed on the bottom portion 101, the left side wall 102, the right side wall 103, and the top surface portion 104. The bellows portion 110 is a portion that enables bending of the cylindrical groove 100 in the up, down, left, and right directions, and is formed in a bellows shape with alternating mountain-shaped convex portions 111 that are folded in a mountain shape and protrude outward from the cylindrical groove 100 and valley-shaped concave portions 112 that are folded in a mountain shape and protrude inward from the cylindrical groove 100.

[0025] In this case, as shown in Fig. 3, the bellows portion 110 is formed so that the thickness thereof becomes thinner from the deepest part of the recessed portion 112 toward the top of the protruding portion 111. In other words, the bellows portion 110 has a thickness t 111 is the thickness t of the recess 112 112In this case, the thickness of bellows portion 110 is continuously reduced from recess 112 to protrusion 111. Furthermore, protrusion 111 and recess 112 each have a curved surface at their tip, and the curvature C 112 The curvature C of the tip of the convex portion 111 111 It is formed smaller than

[0026] The bellows portion 110 thus configured is uniformly formed on the bottom portion 101, the left side wall 102, the right side wall 103, and the top surface portion 104 between the connecting portion 120a and the connecting portion 120b of the cylindrical groove 100. That is, the bellows portion 110 constitutes a cylindrical water channel formed in a substantially rectangular cylindrical cross section. 111 and the thickness t of the recess 112 112 The thickness of the smallest part should be 0.5 mm or more and 2 mm or less, and the thickness of the largest part should be 2 mm or more and 5 mm or less.

[0027] The connecting portions 120a and 120b are portions for connecting another cylindrical groove 100 (not shown) to the cylindrical groove 100, and are formed at both ends of the cylindrical groove 100. More specifically, the connecting portions 120a and 120b are formed in the shape of a recessed groove inside the cylindrical groove 100 and are configured to have fitting portions 121a and 121b that protrude toward the outside of the cylindrical groove 100.

[0028] These fitting portions 121a, 121b are formed as grooves that extend continuously through the bottom 101 between the left side wall 102 and the right side wall 103, and are formed so that their depths become shallower at the upper end portions of the left side wall 102 and the right side wall 103. Two fitting portions 121a, 121b are formed on each of the connecting portions 120a, 120b. Mounting portions 122a, 122b that extend flatly are formed at the upper end portions of the left side wall 102 and the right side wall 103 at the connecting portions 120a, 120b. Mounting portions 122a, 122b are portions to which elongated, plate-shaped angle bars (not shown) are detachably attached.

[0029] The cylindrical groove 100 configured in this manner can be formed using various molding techniques such as blow molding, injection molding, vacuum molding, pressure molding, and extrusion molding.

[0030] (Operation of cylindrical groove 100) The cylindrical trench 100 thus constructed is placed between two U-shaped trenches at the construction site, and the outer surface is buried in the soil or concrete with these two U-shaped trenches connected. In this case, the worker can bend the bellows part 110 in the up, down, left and right directions while it is connected to the two U-shaped trenches, as shown in Figures 4(A) and (B), respectively. In this case, the worker person In this case, the thickness t111 of the convex portion 111 is formed thinner than the thickness t112 of the concave portion 112, so that the bellows portion 110 can be easily bent with an appropriate resistance. This allows the worker to install the cylindrical groove 100 in a state where the bellows portion 110 is bent appropriately according to the shape of the waterway.

[0031] In addition, the worker determines the curvature C of the tip of the convex portion 111. 111 The curvature C of the tip of the recess 112 112 Since the protrusions 111 are small, the frontage and internal space of the recesses 112 are wide, and filler such as soil or concrete can be packed accurately and quickly into the recesses 112 between the protrusions 111. Furthermore, the cylindrical trench 100 is formed in a valley shape in which the bottom center portion 101a of the bottom 101 of the bellows portion 110 protrudes downward from both ends in the width direction, so that deviation in the position or posture of the cylindrical trench 100 in the width direction when the cylindrical trench 100 is buried in soil or concrete can be suppressed, thereby improving stability.

[0032] The cylindrical trench 100 is buried in the ground or concrete with the upper surface 104 exposed to the outside. In other words, the cylindrical trench 100 constitutes a part of a three-sided waterway.

[0033] The cylindrical groove 100 functions as a waterway by allowing water to flow inside the cylindrical groove 100. In this case, the cylindrical groove 100 has a wall thickness t112 The thickness t of the protrusion 111 111 Since the groove is formed thicker than the groove, damage such as wear or tear caused by contact with water flowing through the groove or foreign matter can be suppressed.

[0034] Furthermore, the cylindrical groove 100 has a mountain-shaped configuration in which the central portion 104a of the upper surface of the upper surface 104 protrudes upward relative to both widthwise ends, thereby improving the resistance to loads when heavy objects such as soil or snow are placed on it, and also enabling rain or snow to flow away quickly due to the water gradient created by the mountain-shaped configuration.

[0035] Furthermore, when performing maintenance on the cylindrical groove 100, the worker must remove soil from the outer periphery of the cylindrical groove 100 by adjusting the curvature C of the tip of the protrusion 111. 111 The curvature C of the tip of the recess 112 112 The small size of the holes allows for efficient soil removal.

[0036] As can be understood from the above description of operation, according to the above embodiment, the cylindrical groove 100 has a wall thickness t 111 is the thickness t of the recess 112 112 Since the flexible substrate is formed thin, it can be easily deformed while preventing excessive deformation, and as a result, it can be easily curved.

[0037] Furthermore, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the object of the present invention.

[0038] For example, in the above embodiment, the bellows portion 110 has a wall thickness t 111 The thickness t of the recess 112 112 However, it is sufficient that one of the convex portion 111 and the concave portion 112 of the bellows portion 110 is formed to have a thinner wall thickness than the other. 112 The thickness of the protrusion 111 is t 111This allows the cylindrical groove 100 to have improved resistance to external pressure in soil and concrete.

[0039] In the above embodiment, the tip ends of the convex portions 111 and the concave portions 112 are formed in a pointed shape. This makes it easier for the cylindrical groove 100 to deform than when the convex portions 111 and the concave portions 112 are formed in a rectangular shape. However, the tip ends of the convex portions 111 and the concave portions 112 can also be formed in a shape other than a pointed shape, for example, a square shape such as a rectangle, or a trapezoidal shape.

[0040] In the above embodiment, the curvature C of the tip of the convex portion 111 111 The curvature C of the tip of the recess 112 112 However, the curvature C of the tip of the protrusion 111 111 The curvature C of the tip of the recess 112 112 can also be formed to be the same or larger.

[0041] In the above embodiment, the bottom 101 is formed in a valley shape with the bottom central portion 101a projecting downward. However, the bottom 101 may also be formed flat with the bottom central portion 101a formed on the same plane as both ends in the width direction.

[0042] In the above embodiment, the upper surface portion 104 is formed in a mountain shape with the upper surface central portion 104a projecting upward. However, the upper surface portion 104 may also be formed flat with the upper surface central portion 104a formed in the same plane as both widthwise ends.

[0043] In the above embodiment, the cylindrical groove 100 is configured to include the connecting portions 120a and 120b. However, the cylindrical groove 100 may be configured without the connecting portions 120a and 120b.

[0044] In the above embodiment, the cylindrical groove 100 is configured as a joint that movably connects two cylindrical grooves 100. However, the cylindrical groove 100 does not necessarily have to be a joint as long as it is configured with a bendable bellows portion 110, and may also constitute a water channel itself.

[0045] Furthermore, in the above embodiment, the cylindrical groove 100 is configured to include the bellows portion 110 and the connecting portions 120a and 120b. However, the cylindrical groove 100 may be configured to include the bellows portion 110 on the bottom portion 101, the left side wall 102, the right side wall 103, and the top surface portion 104. Therefore, the cylindrical groove 100 may be configured to include a flat water channel portion that is not bellows-shaped, in addition to the bellows portion 110 on the bottom portion 101, the left side wall 102, the right side wall 103, and the top surface portion 104.

[0046] In the above embodiment, the left side wall 102 and the right side wall 103 are integrally formed with the bottom 101 and the top surface 104 via curved corners. However, the left side wall 102 and the right side wall 103 can also be integrally formed with the bottom 101 and the top surface 104 via inclined corners. [Explanation of symbols]

[0047] t 111 …thickness of the protruding part, t 112 …thickness of recess, C 111 …Curvature of the tip of the convex part, C 112 ...curvature of the tip of the recess, 100...Cylindrical groove, 101...Bottom part, 101a...Bottom center part, 102...Left side wall, 103...Right side wall, 104...Top part, 104a...Top center part, 110... bellows portion, 111... convex portion, 112... concave portion, 120a, 120b...connecting portion, 121a, 121b...fitting portion, 122a, 122b...mounting portion.

Claims

1. A cylindrical channel formed in a cylindrical shape with a bottom through which water flows, two side walls rising from both ends of the bottom in the width direction, and an upper surface facing the bottom and covering the bottom, is provided with a bellows-like bellows section formed by alternating convex convex sections that jut outward and concave sections that are recessed inward relative to the convex sections, and is made of resin. The bellows portion is A cylindrical groove characterized in that one of the convex portion and the concave portion is formed to be thinner than the other, and is formed in a sharp shape toward each tip of the convex portion and the concave portion.

2. In the cylindrical groove described in claim 1, The bellows portion is A cylindrical groove characterized in that the tip ends of the convex portions and the concave portions are formed by curved surfaces, and the curvature of the tip ends of the concave portions is smaller than that of the tip ends of the convex portions.

3. A cylindrical channel formed in a cylindrical shape with a bottom through which water flows, two side walls rising from both ends of the bottom in the width direction, and an upper surface facing the bottom and covering the bottom, is provided with a bellows-like bellows section formed by alternating convex convex sections that jut outward and concave sections that are recessed inward relative to the convex sections, and is made of resin. The bellows portion is A cylindrical groove characterized in that one of the convex portion and the concave portion is formed to be thinner than the other, and the central portion of the upper surface in the width direction of the upper surface is formed in a mountain shape that protrudes upward relative to both end portions in the width direction.

4. A cylindrical channel formed in a cylindrical shape with a bottom through which water flows, two side walls rising from both ends of the bottom in the width direction, and an upper surface facing the bottom and covering the bottom, is provided with a bellows-like bellows section formed by alternating convex convex sections that jut outward and concave sections that are recessed inward relative to the convex sections, and is made of resin. The bellows portion is A cylindrical groove characterized in that one of the convex portion and the concave portion is formed to be thinner than the other, and the center portion of the bottom in the width direction is formed in a valley shape that protrudes downward relative to both width direction ends.

5. The cylindrical groove according to any one of claims 1 to 4, The bellows portion is A cylindrical groove characterized in that the recessed portion is formed thicker than the protruding portion.

6. The cylindrical groove according to any one of claims 1 to 4, The bellows portion is A cylindrical groove characterized in that the thickness of the protrusions and recesses is formed to continuously decrease from one to the other.

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