JP3566406B2 - Method of manufacturing flexible membrane weir - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a method of manufacturing a bag-shaped flexible membrane weir that rises by injection of a fluid to form a weir across a river, and that when the fluid is discharged, the weir falls down to free the flow of the river. Things. In particular, the present invention relates to a method for manufacturing a flexible weir having a protective layer so that the flexible weir is not damaged artificially.
[0002]
[Prior art]
Flexible membrane weirs can be freely expanded and contracted, so we use them for irrigation, water supply, industrial use, etc., weirs for backflow prevention, sand prevention, wave protection, etc. Widely used for shunting and flow control floodgates. However, the flexible membrane weir may be artificially damaged by a sharp object such as a knife, and therefore, a rubber sheet protective layer in which a large number of small pieces of ceramics or the like are embedded is combined with the outer layer of the flexible membrane weir. It is preferred to prevent such damage by doing so.
[0003]
However, for example, in Japanese Unexamined Patent Publication No. Hei 4-330111, a large number of ceramic pieces are scattered while being deposited in a short sheet of unvulcanized rubber thinly, and then the ceramic pieces are buried by a non-vulcanized press mold to obtain a non-vulcanized short piece. Was obtained, and this was sequentially attached to the unvulcanized flexible membrane dam body.
[0004]
[Problems to be solved by the invention]
However, the conventional short protective layer rubber sheet and the method for producing the same have the following problems. That is, (1) since it is short, it takes a lot of time to attach it to the flexible membrane dam main body. (2) In addition, since the number of joints increases, it is necessary to deal with defective products or defective appearance, thereby requiring preparation of auxiliary materials (unvulcanized sheet rubber, tools, etc.) and extra man-hours. (3) Since it is a short protective layer sheet, it takes time since a large number of sheets must be made, especially in the case of a large flexible membrane dam. The present invention has been made as a result of studying to solve such problems of the prior art, and the object of the present invention is to use a continuous long rubber sheet for a protective layer, An object of the present invention is to attach a rubber sheet for a protective layer to an unvulcanized flexible membrane dam body with a small number of man-hours and to minimize the use of sub-materials for measures against poor appearance, and with a small number of members.
[0005]
[Means for Solving the Problems]
The present invention employs the following configuration to achieve the above object. That is, in a flexible membrane dam that is installed across a river or the like, rises by injecting a fluid such as water or air, and falls down by discharging, (1) a corrosion-resistant cut-off surface coated with a rubber adhesive is applied. (2) continuously dispersing a large number of small pieces of the flawed member substantially uniformly on the lower unvulcanized rubber sheet; and (2) further synchronizing the upper unvulcanized rubber sheet with the step. After continuously laminating on the lower unvulcanized rubber sheet and heating to a predetermined temperature, the small piece is buried between the lower unvulcanized rubber sheet and the upper unvulcanized rubber sheet using a pressure roller. Producing a continuous long unvulcanized protective layer sheet and winding it onto a roll; and (3) unvulcanized on the unvulcanized main body so as to form the main body of the flexible membrane weir. The protective layer sheet is continuously unwound from the roll and laminated to form an unvulcanized flexible membrane weir. Forming, there is provided a (4) wherein the step of integrating vulcanizing unvulcanized flexible membrane weir at vulcanization press method for producing a flexible membrane weir made of.
[0006]
Here, the shape of a small piece of ceramics or the like may be a sphere, a cylinder, a prism, or any shape as long as it can be manufactured. In addition, although the size is slightly irregular, there is no problem in terms of manufacturing and performance, but the width (diameter) is preferably 1.5 to 3 mm and the length is preferably 3 to 5 mm. Those having a diameter of about 2.8 mm and a length of about 5 mm are preferable because they do not lose the flexibility of the entire flexible membrane dam and have excellent damage resistance.
[0007]
[Action]
According to the configuration of the method for manufacturing a flexible membrane weir of the present invention, small pieces of a corrosion-resistant and break-resistant member such as ceramics are continuously and substantially uniformly scattered on the lower unvulcanized rubber sheet. The upper unvulcanized rubber sheet is laminated so as to synchronize with it, and after preliminarily heating to a predetermined temperature, a small piece is buried between the lower unvulcanized rubber sheet and the upper unvulcanized rubber sheet by a pressure roller. Let it. At this time, since each member is heated to a predetermined temperature in advance, small pieces can be easily and reliably buried. Then, the protective layer sheet thus manufactured is continuously wound up into a roll with a length of about 10 m. At this time, it is desirable to use a liner such as polyester or cloth between the sheets so that the sheets do not adhere to each other.
[0008]
Then, the protective layer sheet is unwound from a roll and laminated on an unvulcanized main body so as to become a main body of the flexible membrane dam. At this time, since the protective layer sheet is long, the number of seams can be reduced, so that the work can be performed accurately and quickly, and the repair of the seam after lamination can be reduced, which is still more efficient.
[0009]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 5 is an example showing a flexible membrane weir constructed by the manufacturing method of the present invention, which is installed in a direction transverse to the riverbed of a river, and is brought into an upright state by fluid injection (the injection part is not shown). It comprises a fixed anchor to the riverbed 1, a main body 2 of a flexible membrane weir, and a protective layer 3. The main body is reinforced with two layers of canvas, but if more strength is required, three or more layers may be used.
[0010]
FIG. 1 is a view for explaining a method for producing the unvulcanized protective layer sheet 7 of the present invention. In the figure, reference numeral 5 denotes a lower rubber sheet having a width of 1300 mm, a thickness of 4 mm, and a length of 10 m. The rubber sheet 5 is wound up by a roll 21 and is continuously unwound therefrom. The sheet is fed from the right side to the left side in the figure and passes through the small piece container and the scattering device 14 so that the sheet is fed. A small piece 4 of a column-shaped bonded ceramic having a length of 5 mm and a diameter of 2.8 mm is thinly scattered thereon. Further, the upper unvulcanized rubber sheet 6 of the same size is unwound from the roll 22 previously wound in the same manner as in the above step, and is put on the lower unvulcanized rubber sheet 5. Then, the upper and lower surfaces are heated to 60 ° C. through the preheater 12 and pressed by the pressure roller 13 to bury the small pieces between the lower unvulcanized rubber sheet and the upper unvulcanized rubber sheet as shown in FIG. . Here, the preheater may use, for example, a far-infrared ray or an ordinary electric heater, but since heating is performed until the rubber surface is in a vulcanized state, adhesion cannot be obtained in the next integration step. Not preferred. Then, it is wound up and stored on a roll 30 having an appropriate diameter.
[0011]
FIG. 2 shows a process of laminating an unvulcanized main body 10 and an unvulcanized protective layer sheet 7 to produce an unvulcanized flexible membrane weir. The protective layer sheet 7 is unwound from the above-mentioned roll 30 and is laminated. After lamination, it is usually wound up on a roll 24. In this case, since the sheet for the protective layer is long, the number of seams is reduced and the layers can be efficiently laminated. In the step (3) of the present invention, the protective layer sheet 7 may be unwound from the roll 30 in advance, cut into a predetermined length, and used. Thereafter, the product is vulcanized and integrated by a vulcanizing press to obtain a product.
[0012]
【The invention's effect】
As is clear from the above description, according to the present invention, a long sheet for a protective layer is continuously produced, and the sheet is laminated on an unvulcanized main body to form an unvulcanized flexible sheet. The number of joints is reduced in order to produce a permeable membrane weir, and the operation can be performed accurately and quickly, and the repair of the joints is also reduced.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of the present invention. After small pieces are continuously scattered on a lower unvulcanized sheet, an upper unvulcanized sheet is laminated and heated to a predetermined temperature; It shows that a sheet for an unvulcanized protective layer is produced by pressure bonding with a pressure roller.
FIG. 2 is a schematic view showing an embodiment of the present invention, in which an unvulcanized flexible dam film is formed by laminating an unvulcanized protective layer sheet on an unvulcanized main body.
FIG. 3 is a cross-sectional view showing an unvulcanized protective layer sheet according to an example of the present invention.
FIG. 4 is a cross-sectional view illustrating a flexible membrane weir according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a standing state of a weir constructed using the manufactured flexible membrane weir.
[Explanation of symbols]
R ‥ flexible membrane weir,
1 ‥ riverbed,
2 ‥ flexible membrane weir body,
3 ‥ protective layer,
4 pieces (ceramics),
5mm lower rubber sheet,
6 ‥ Upper rubber sheet,
7 ‥ Sheet for unvulcanized protective layer,
8 ‥ canvas layer,
9 ‥ rubber layer,
10mm unvulcanized body,
11 unvulcanized flexible membrane weir,
12 ‥ preheater,
13 mm pressure roller,
14 ‥ small container and scattering device,
21, 22, 23, 24, 30 ° Winding (unwinding) roll.

Claims (1)

Flexible membrane dams installed across rivers, etc., which rise by injection of fluids such as water or air and fall down by discharge, (1) Corrosion resistance with a surface coated with rubber adhesive and cut resistance (2) continuously dispersing a large number of small pieces of the member having the above substantially uniformly over the lower unvulcanized rubber sheet; After being laminated on the lower unvulcanized rubber sheet and heated to a predetermined temperature, the small pieces are buried between the lower unvulcanized rubber sheet and the upper unvulcanized rubber sheet using a pressure roller. Producing a continuous sheet of unvulcanized protective layer and winding it up on a roll; and (3) forming the unvulcanized protective layer on the unvulcanized main body so as to be the main body of the flexible membrane weir. Sheet is continuously unwound from the roll and laminated to form an unvulcanized flexible membrane weir. That step and, (4) the production method of the flexible membrane weir to the process of the unvulcanized flexible membrane weir vulcanized integrated by vulcanizing press, characterized in that it consists of.

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