JP2018115459A - Rubber undulation weir body and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber undulation weir body having a sufficient bonding strength suitable for use of a rubber undulation weir having a weir height exceeding 1.5 m and having fins useful for preventing vibration and preventing damage at falling.SOLUTION: A rubber undulation weir body has a plurality of sets of rubber sheet laminates 2 having joining portions in the axial direction. In each set of rubber sheet laminates, rubber sheets 21 to 25 having the same shape are laminated while being shifted from each other by a predetermined amount in the axial direction, and has a stepwise portion 4 in the axial direction in which the rubber sheets of the respective layers are shifted by the predetermined amount at an end in the axial direction. Rubber sheet protruding surfaces 211 to 251 of the rubber sheets of the respective layers which are displaced by the predetermined amount along the axial direction forming the stepwise portions in the axial direction of each other and protruding surfaces of the rubber sheets of other layers are pressed against each other at the joining portions of the adjacent rubber sheet laminates. The rubber sheets of the outermost layer are arranged flush with each other, and unvulcanized fin joining portions are vulcanization joined to each other in the rubber sheet laminates. Fins provided along the axial direction of the rubber sheet laminates are vulcanization joined to unvulcanized fin joining portions of the rubber sheet laminates.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rubber undulation weir body used for a rubber undulation weir and a method for manufacturing the same, and is particularly suitable for a dam height exceeding 1.5 m.

Conventionally, rubber weirs have been widely used to block rivers and waterways, and various improvements have been promoted for the purpose of stopping water in small and medium-sized rivers and securing water levels in agricultural waterways.
By the way, since the width of the woven fabric used for the rubber sheet laminate used for rubber weir construction is about 1.5 m, when the longitudinal direction of the woven fabric is arranged in the axial direction, it can be constructed with one woven fabric. The height of the rubber weir is about 0.5m, and considering the standard heating plate with a width of 3.0m in vulcanization, the height of the rubber weir that can be constructed without a joint after vulcanization is the maximum It is about 1.5m. Therefore, when the height of the rubber weir is 1.5 m or more, it is necessary to join a plurality of post-vulcanized rubber sheet laminates using an adhesive to form a rubber undulation weir body. And as what joined the multiple rubber sheet laminated body by the back adhesion using the adhesive, what was joined to the circumferential direction described in the patent 3302430 shown as patent document 1, and patent document 2 There are two types of those bonded in the axial direction (river width direction) described in JP-A-58-17910.

  In the case where the rubber sheet laminate of Patent Document 1 is joined in the circumferential direction, for example, as shown in FIG. 5A, the connection portion j is provided in the circumferential direction, and the fin f is provided at the tip of the folded portion. . Then, when lying down, it falls into a flat shape as shown in FIG. Moreover, as shown in FIG.5 (c), the connection part j is connected with the rubber sheet laminated body g on either side in the drawing with the reinforcing material r. Further, Patent Document 1 is one in which at least two or more main body divided portions divided in the circumferential direction of the rubber weir main body are integrally bonded to each other by post-bonding.

  In the case where the rubber sheet laminate of Patent Document 2 is joined in the axial direction, for example, as shown in FIG. Further, Patent Document 2 is one in which at least two or more flexible membrane weir parts divided and molded in the longitudinal direction (axial direction) of the flexible membrane weir are bonded together by post-bonding. . In the example shown in FIG. 6, there are no fins, so the folded portion h is rounded and hinders running water.

Japanese Patent No. 3302430 JP 58-17910 A

  However, since what was joined over the circumferential direction of patent document 1 is vulcanized again after what was vulcanized again, the post-bonding location becomes insufficient in strength compared with the main body. Furthermore, since the tension acting during expansion in the circumferential direction works stronger than in the axial direction, there is a high risk of breakage at the joint, and there have been reports of cases where the connection is broken at the connection in the circumferential direction.

  Moreover, since what was joined over the axial direction of patent document 2 is also vulcanized again after being vulcanized, the force which acts on an axial direction at the time of expansion is more than the force which acts on the circumferential direction. Although it is small, as is also concerned in Patent Document 2, the post-bonding portion has a lower strength than the main body portion and may be damaged at the joint portion.

  In addition, it is because the following joining methods are implemented that the intensity | strength of a junction part falls by post-bonding after vulcanization like patent document 1 or patent document 2. Hereinafter, the joining method disclosed in Patent Document 2 will be described as an example. As shown in FIG. 7A, the notch c of each rubber sheet g and the reinforcing material r are bonded to each other with an adhesive as shown in FIG. 7A, or as shown in FIG. 7B. The notched portion c of each rubber sheet g and the reinforcing material r may be integrally post-cured by an unvulcanized rubber sheet u which is a planar heating element containing special carbon instead of the agent, or FIG. And, as shown in (d), the outer surface of the mutual joining edge portion of each rubber sheet g is deleted d with a multi-step number, and a reinforcing material r is formed in a shape corresponding to the step, and the reinforcement The material r is post-vulcanized so that a reinforcing layer similar to the reinforcing layer s is embedded at a depth corresponding to each reinforcing layer s of each rubber sheet g.

  By any bonding method as shown in FIGS. 7A to 7D, the opposing rubber sheets g are indirectly bonded via the reinforcing material r without being integrally vulcanized. It depends on the adhesive strength between the reinforcing material r and each rubber sheet g. In post-vulcanization, the adhesive strength between the rubber sheet g and the reinforcing material r is weak, which is sufficient compared to joining unvulcanized rubber. It is difficult to ensure strength.

  Patent Document 2 discloses a rubber undulation weir body having a joint portion in the axial direction by post-bonding of rubber after vulcanization as shown in FIGS. 7A to 7D and further having fins. However, it is difficult to ensure the strength of the fin joint, and it has not been realized.

  The present invention has been made in view of such circumstances, and its object is to have sufficient bonding strength suitable for the use of rubber undulation weirs with a weir height exceeding 1.5 m, and to prevent vibrations. And to provide a rubber undulation weir body having fins useful for preventing damage during overturning.

  In order to achieve the above object, a rubber undulation weir body according to the present invention has a plurality of sets of rubber sheet laminates having joints in the axial direction, and extends along the axial direction of the plurality of sets of rubber sheet laminates. The rubber sheet laminates of each set having the provided fins, the rubber sheets of the same shape are laminated with a predetermined amount shifted along the axial direction, and at the end in the axial direction, The rubber sheet has an axial stepped portion that is deviated by a predetermined amount, and the joint portions of the rubber sheet laminates adjacent to each other in the axial direction have a predetermined amount along the axial direction that forms the axial stepped portion of each other. The protruding surfaces of the shifted rubber sheets and the protruding surfaces of the other rubber sheets are pressure-bonded and the outermost rubber sheets are arranged flush with each other. The joints in a vulcanized state are vulcanized and joined together, Characterized in that the fins provided along the axial direction of the rubber sheet laminate is the rubber sheet laminate fin joints and vulcanization bonding unvulcanized.

  Further, according to the method of manufacturing a rubber undulation weir body according to the present invention, rubber sheets of the same shape are laminated with a predetermined amount shifted along the axial direction, and the rubber sheets of each layer along the axial direction are stacked at the end in the axial direction. The step of preparing a plurality of unvulcanized rubber sheet laminates having axially stepped portions deviated by a predetermined amount, and the axially stepped portions of the rubber sheet laminates adjacent to each other in the axial direction. The surface of the rubber sheet of each layer shifted by a predetermined amount along the axial direction to form the surface of the rubber sheet of the other layer and the surface of the rubber sheet of the other layer are arranged so that the rubber sheets of the outermost layer are flush with each other. A step of forming a single plate-like body by integrally vulcanizing and bonding, leaving a portion along the axial direction corresponding to the portion, and a portion corresponding to the fin portion along the axial direction of the single plate-like body Folded in the circumferential direction as a folding part, corresponding to the fin part along the axial direction Forming an unvulcanized fin min, characterized in that it and a step of performing vulcanization to said fin portion of the unvulcanized fins are formed the Folded plate body.

  According to the present invention, a plurality of sets of unvulcanized rubber sheet laminates adjacent to each other in the axial direction are joined together without using a reinforcing material or an adhesive on the protruding surface that forms the axial stepped portion that becomes the joint. Stable joint strength can be obtained due to the sulfur molding. In addition, since the outermost rubber sheets placed flush with each other are joined from an unvulcanized state, the surface has no irregularities and is excellent in appearance, and also prevents peeling of the joined parts due to the irregularities. Can do.

  Further, since the fin is also vulcanized and bonded to the rubber sheet laminate from an unvulcanized state, the bonding strength is high and the durability is large.

  According to the present invention, there is provided a rubber hoisting weir that has a low risk of damage at the joint, has an effect of preventing vibrations, and can prevent damage caused by a falling material due to a rubber protrusion at the downstream portion during overturning.

It is a perspective view of the rubber hoisting dam using the rubber hoisting dam main body of the present invention. It is explanatory drawing for connecting the rubber sheet laminated body which laminated | stacked the rubber sheet at the time of manufacturing the rubber undulation weir main body of this invention. It is explanatory drawing of the manufacturing method of the rubber undulation dam main body of this invention, (a) is a top view which shows the state which connected the rubber sheet laminated body to the axial direction, (b) is the A section enlarged front view of (a). It is. It is explanatory drawing of the manufacturing method of the rubber undulation dam main body of this invention, and is explanatory drawing which shows the method of shape | molding a fin in the axial direction of the rubber sheet folded in half. It is explanatory drawing which shows the joining of the circumferential direction of the conventional rubber undulation dam main body, (a) is a perspective view, (b) is a front view which shows a lying state, (c) is the B section enlarged view of (b). is there. It is a perspective view which shows the connection of the axial direction of the conventional rubber undulation main body. It is explanatory drawing which shows the example of joining of the rubber sheet by the post-bonding after the conventional vulcanization.

Hereinafter, an example of the rubber undulation weir body of the present invention will be described with reference to FIGS.
The rubber undulation weir body of the present invention is provided along the axial direction of a plurality of sets of rubber sheet laminates 2 having joints 1 in the axial direction and a plurality of sets of rubber sheet laminates 2 as shown in FIG. The fin 3 is provided.

  As shown in FIG. 2, each set of rubber sheet laminates 2 is formed by laminating rubber sheets 21, 22, 23, 24, and 25 having the same shape with a predetermined amount shifted along the axial direction. The rubber sheet of each layer has the axial step part 4 which shifted | deviated predetermined amount along the axial direction. It should be noted that the axial stepped portion 4 may not be provided at an end portion that is not joined to the other rubber sheet laminate 2, for example, at a place where it is attached to a river slope. When joining each set of rubber sheet laminates 2, the joining portions of the rubber sheet laminates 2 adjacent to each other in the axial direction are mutually connected in the axial stepped portion 4 as shown in FIG. The protruding surfaces 211, 221, 231, 241, 251 of the rubber sheets 21, 22, 23, 24, 25 shifted by a predetermined amount along the axial direction to be formed are the rubber sheets 21, 22, 23, 24, The outermost rubber sheets 21 are arranged flush with each other, with the 25 protruding surfaces 211, 221, 231, 241, 251 being crimped to each other.

  As shown in FIG. 1, the rubber sheet laminate 2 is joined in the axial direction, and the left and right rubber sheet laminates 2 are projected surfaces of the axial stepped portion 4 as shown in FIGS. 2 and 3A and 3B. 211, 221, 231, 241, 251 are integrally vulcanized from an unvulcanized state. That is, since the left and right rubber sheet laminates 2 are joined without being post-bonded after vulcanization, the joining strength is increased, and even if the weir height exceeds 1.5 m, sufficient joining strength, It also has durability against extreme bending due to creases generated near the legal part during expansion.

  Further, since the fins 3 are also provided as shown in FIG. 1, the occurrence of vibration due to overflow water during expansion is prevented, and not the rounded folded portion h as shown in FIG. Damage due to falling material due to the rubber protrusion at the downstream portion is also prevented.

Next, the Example of the manufacturing method of the rubber hoisting dam main body of this invention is described based on FIGS.
First, as shown in FIG. 2, unvulcanized rubber sheets 21, 22, 23, 24, and 25 having the same shape are shifted stepwise in the axial direction by a predetermined amount, and rubber in each layer along the axial direction at both ends in the axial direction. A plurality of unvulcanized rubber sheet laminates 2 having axial stepped portions 4 in which the sheets 21, 22, 23, 24, 25 are shifted by a predetermined amount are prepared. The rubber sheet 21 is an outer rubber that is the outermost layer, and the rubber sheet 25 is an inner rubber that is the innermost layer. The rubber sheets 22, 23 and 24 are rubberized cloths using the canvas 5 as a reinforcing material. In the illustrated example, the rubber sheet laminate 2 is formed from five rubber sheets, but the number and material of these can be arbitrarily selected.

  Then, the protruding surfaces 211 of the rubber sheets 21, 22, 23, 24, 25 that are shifted by a predetermined amount along the axial direction of the rubber sheet laminates 2 adjacent to each other in the axial direction to form the axial stepped portions 4 of each other. , 221, 231, 241, 251 and the protruding surfaces 211, 221, 231, 241, 251 of the rubber sheets 21, 22, 23, 24, 25 of other layers as shown in FIG. Then, the outermost rubber sheets 21 are placed flush with each other and vulcanized and joined using a large hot plate press in an unvulcanized state as shown in FIG. A sheet of plate-like body 6 is formed. A part along the axial direction corresponding to the fin portion at the center in the circumferential direction of FIG. 3A is in an unvulcanized state in order to join the fin 3 of FIG. In order to set the portion corresponding to the fin portion to an unvulcanized state, for example, when performing vulcanization joining using the large hot plate press, the heating temperature of the portion corresponding to the fin portion is adjusted, What is necessary is just to make the part which is attached | subjected into an unvulcanized state.

  Next, for the convenience of folding the plate-like body 6 into the bag body by folding the plate-like body 6 in the circumferential direction with the portion corresponding to the fin portion along the axial direction as a fold portion, and to prevent air accumulation inside the bag body folded portion V-shaped grooves 7 are formed in the innermost rubber sheet 25 in the axial direction. Then, when the plate-like body 6 and the fin portion are vulcanized, a release mylar 8 is provided to prevent the upper and lower innermost rubber sheets 25 facing each other from being joined.

  Next, the unvulcanized fins 3 are formed in portions corresponding to the unvulcanized fin portions along the axial direction of the folded plate-like body 6 as shown in FIG. As shown in FIG. 1, when the rubber undulation weir body of the present invention expands, the fin 3 stands against the overflow water in the axial direction, and at the time of the fall, the fin 3 portion becomes the downstream tip of the fall surface and is made of rubber in a flat state. Molded so that the undulation weir body falls.

  Then, the unvulcanized portion of the folded plate-like body 6 and the fins 3 are vulcanized and joined by a hot plate press so as to be integrated with each other.

DESCRIPTION OF SYMBOLS 1 Junction part 2 Rubber sheet laminated body 21, 25 Rubber sheet 22, 23, 24 Rubber sheet with a reinforcing layer 211, 221, 231, 241, 251 Protruding surface 3 Fin 4 Axial stepped part 5 Canvas 6 Plate-like body 7 V Groove 8 Mylar for mold release

Claims (2)

Having a plurality of sets of rubber sheet laminates having joints in the axial direction,
Having fins provided along the axial direction of the plurality of sets of rubber sheet laminates;
The rubber sheet laminates of each set are laminated with a rubber sheet having the same shape shifted by a predetermined amount along the axial direction, and a shaft where the rubber sheet of each layer is shifted by a predetermined amount along the axial direction at the axial end. Having a directional step,
The joining portions of the rubber sheet laminates adjacent in the axial direction are the protruding surfaces of the rubber sheets of each layer shifted by a predetermined amount along the axial direction forming the axial stepped portions of each other, and the rubbers of the other layers The projecting surfaces of the sheets are pressure-bonded and the outermost rubber sheets are arranged flush with each other, and the plurality of sets of rubber sheet laminates are vulcanized and bonded to the unvulcanized joints, A rubber undulation weir body characterized in that the fins provided along the axial direction of a plurality of sets of rubber sheet laminates are vulcanized and joined to unvulcanized fin joints of the rubber sheet laminates . A rubber sheet having the same shape is laminated with a predetermined amount shifted along the axial direction, and an unvulcanized state having an axial stepped portion where a rubber sheet of each layer is shifted by a predetermined amount along the axial direction at the end in the axial direction Preparing a plurality of sets of rubber sheet laminates,
Between the rubber sheet laminates adjacent in the axial direction, the surface of the rubber sheet of each layer shifted by a predetermined amount along the axial direction forming the axial stepped portion of each other, and the surface of the rubber sheet of the other layer The outermost rubber sheets are placed flush with each other, and a single plate-like body is formed by integrally vulcanizing and joining, leaving a part along the axial direction corresponding to the fin portion; and ,
The plate-like body is folded in two in the circumferential direction with a portion corresponding to the fin portion along the axial direction as a folded portion, and an unvulcanized fin is formed in the portion corresponding to the fin portion along the axial direction. And a process of
Vulcanizing the fin portion of the folded plate-like body on which the unvulcanized fin is formed;
A method for producing a rubber undulation weir body characterized by comprising:

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