JP5039596B2 - Rolling gate - Google Patents

Description

  The present invention relates to a relief gate.

  2. Description of the Related Art Conventionally, there is an undulation gate that is supported at the bottom of a water channel and is provided with a door body that is rotatable between an upstream standing position and a downstream lying position (see Patent Document 1).

The door body as described above is generally made of a steel plate, and a steel girder for reinforcement is attached to the downstream surface of the door body by welding.
JP 2006-57327 A

  However, the conventional steel undulation gate has a problem that the weight increases due to the girders, which places a burden on the drive device for the undulation, and it is difficult to handle the installation and the construction is expensive. . Further, the girders to be welded to the door body have many problems such as a large number of fillet welds and distortion of the door body. Furthermore, there is a problem that dust and sand accumulate on the girders on the downstream surface of the door body, which is undesirable from the environment. Further, when a spoiler is attached to the upper end of the door body in order to prevent vibration of the door body, there is a problem that the installation cost increases and dust is caught on the spoiler, which is not preferable from the environment.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a undulation gate that is devised so that a spar and a spoiler of a door body are unnecessary.

In order to solve the above-mentioned problems, the present invention is a hoisting gate provided with a door body supported at the bottom of a water channel and capable of rotating between an upstream standing position and a downstream lying position. The door body is formed with vertical ridges that concavo-convex in the upstream and downstream directions at predetermined intervals in the lateral direction to prevent the door body from extending in the lateral direction above the downstream surface of the door body. The present invention provides a relief gate characterized in that a material is attached thereto.

  According to a second aspect of the present invention, it is preferable that the depth of the uneven strip of the door body is formed so as to gradually become shallower from the lower end turning side toward the upper end overflow side.

  As in claim 3, it is preferable that the concave and convex strips of the door body are formed in a trapezoidal shape that is continuous in the lateral direction in plan view.

  According to a fourth aspect of the present invention, the uneven strip of the door body is preferably formed by bending a single metal plate in a meandering manner in the lateral direction.

According to the present invention, by forming the vertical concavo-convex strips that concavo-convex in the upstream and downstream directions on the door body at predetermined intervals in the lateral direction, the concavo-convex strips become vertical girders so that the door body itself is reinforced. Become. This eliminates the need for conventional girders (girder-less structure), reduces the weight of the door body, eliminates the burden on the drive device for undulations, and facilitates installation and other work. Is cheaper. Moreover, since it is not necessary to weld the girders to the door body, problems such as distortion of the door body are reduced. Furthermore, the problem that dust and sand accumulate on the girders is eliminated. Furthermore, since the uneven strips of the door body also serve as a spoiler, it is not necessary to attach the spoiler to the door body, so that the installation cost is not required and the problem that dust is caught on the spoiler is eliminated. Furthermore, by forming the ridges in the vertical direction of the door body, there is no problem that dust is caught on the ridges. Moreover, since the upper end part of the door body is not straight but is uneven in the upstream and downstream directions, the overflow water amount can be increased by increasing the overflow length in total.
Moreover, by attaching a spread preventing material extending in the lateral direction to the upper position of the downstream surface of the door body, it becomes possible to prevent the uneven strips of the door body from spreading in the lateral direction due to water pressure. .

  According to claim 2, the depth of the ridges of the door body is formed so as to gradually become shallower from the lower end rotation side toward the upper end overflow side, compared with the upper end overflow side where the water flow pressure is weak. Thus, the strength of the lower end rotation side where the water flow pressure is strong can be increased. Therefore, the weight can be further reduced while maintaining the strength balance of the door as a whole.

  According to the third aspect, the strength against the water flow pressure is improved by forming the concave and convex strips of the door body in a trapezoidal shape that is continuous in the lateral direction in plan view.

  According to the fourth aspect, by forming the concave and convex stripes of the door body by bending one metal plate in a meandering manner in the lateral direction, there are no problems such as a reduced number of welded portions and distortion of the door body.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front sectional view of the water channel 1, and FIG. 2 is a side sectional view of the water channel 1. In addition, as for the undulation gate 4 of FIG. 1, the left half shows transparently the back side.

  At the bottom of the water channel 1 is installed a hoisting gate 4 provided with a door 3 that is supported by a rotating shaft 2 and is rotatable between an upstream standing position U and a downstream lying position D. ing. A hydraulic cylinder 6 is connected to the lever 5 at the end of the rotating shaft 2, and the door body 3 is controlled to rotate between the standing position U and the lying position D by the hydraulic cylinder 6.

  As shown in detail in FIGS. 3 to 5, the door body 3 is formed with longitudinal ridges 3 a and 3 b undulating in the upstream and downstream directions at a predetermined interval P in the lateral direction. The uneven strips 3a and 3b are basically formed by bending a single metal plate (for example, a 9 mm-thick steel plate, SUS plate, etc.) in a meandering manner in the lateral direction. Moreover, the uneven | corrugated strips 3a and 3b are formed in the trapezoid shape which continues in a horizontal direction by planar view.

  Furthermore, the depths D1 and D2 of the ridges 3a and 3b are formed so as to gradually become shallower from the lower end turning side toward the upper end overflow side.

  That is, as shown in FIG. 4, when the height (vertical direction) H of the door body 3 is 1600 mm and the width (lateral direction) W (see FIG. 1) is 7200 mm, the interval P is 1800 mm and 3a and 3b are formed. The depths D1 and D2 of the ridges 3a and 3b are formed such that the depth D2 on the lower end rotation side is 200 mm and the depth D1 on the upper end overflow side is 100 mm.

  As a result, the maximum width W1 of the recess 3a is 1000 mm, the maximum width W2 of the protrusion 3b is 800 mm, the inclination width W3 on the lower end rotation side of the projections 3a and 3b is 100 mm, and the inclination width W4 on the upper end overflow side is 50 mm.

  In addition, each said numerical value is the illustration for making it easy to understand the uneven | corrugated strip 3a, 3b of the door body 3, Comprising: What is necessary is just the conditions of the range of 0 <D1 / D2 <= 1.

  As shown in FIGS. 1 and 2, an expansion preventing material 7 extending in the lateral direction is attached to the upper position of the downstream surface of the door body 3 over the entire length. The spread preventing material 7 is a steel plate, a SUS plate or the like.

  If the undulating gate is configured as described above, the vertical concavo-convex ridges 3a and 3b that concavo-convex in the upstream and downstream directions are formed in the door 3 at a predetermined interval P in the horizontal direction, so that the concavo-convex ridges 3a and 3b are vertically The door 3 itself is reinforced as a girder. Therefore, the conventional girders are not required (girder-less structure), so the weight of the door body 3 is reduced, the burden on the driving device for undulations is reduced, and installation and other handling are easy and work. Etc. will be cheaper.

  Further, since it is not necessary to weld the girders to the door body 3, problems such as the door body 3 being distorted are reduced. Furthermore, the problem that dust and sand accumulate on the girders is eliminated.

  Further, since the concave and convex strips 3a and 3b of the door body 3 also serve as a spoiler, there is no need to attach the spoiler to the door body 3, so that the installation cost is not required and the problem that dust is caught on the spoiler is eliminated.

  Here, to supplementarily explain the action of the spoiler, if the upper end portion of the door body 3 is in a straight line, the water film without a gap between the door body 3 and the downstream side of the door body 3 due to overflow water. Will be formed. Air between the door 3 and the flow of the water film is taken into a negative pressure (vacuum state), and the door 3 is pulled by the negative pressure to vibrate. Accordingly, the water film is cut with a spoiler at the upper end of the door body 3 and air is introduced between the cut and the door body 3 to prevent negative pressure and prevent the door body 3 from vibrating. .

  In the present embodiment, the uneven strips 3a and 3b of the door body 3 also serve as a spoiler. The reason is as follows. As shown in FIG. 4, the uneven strips 3a and 3b are uneven in the upstream and downstream directions. Therefore, the depth on the upper end overflow side of the ridges 3a and 3b between the water film B due to overflow water from the upper end portion of the recess 3a and the water film C due to overflow water from the upper end portion of the protrusion 3b. A level difference of only D1 occurs. This becomes a break in the water film, and air (see arrow a) enters between the break and the door body 3 to prevent negative pressure and prevent the door body 3 from vibrating.

  Next, by forming the uneven strips 3a and 3b in the longitudinal direction of the door body 3, the problem that dust is caught on the uneven strips 3a and 3b is eliminated. Moreover, since the upper end part of the door body 3 is not straight but is uneven | corrugated in the upstream / downstream direction, the overflow amount can be increased by increasing the overflow length in total.

  In addition, by forming the depths D1 and D2 of the ridges 3a and 3b of the door 3 so as to gradually become shallower from the lower end rotation side toward the upper end overflow side, the upper end overflow side where the water flow pressure is weak is formed. In comparison, the strength on the lower end rotation side where the water flow pressure is strong can be increased. Therefore, the weight can be further reduced while maintaining the strength balance of the door 3 as a whole.

  Furthermore, the uneven | corrugated strips 3a and 3b of the door body 3 are formed in a trapezoidal shape that is continuous in the lateral direction in plan view, thereby improving the strength against water flow pressure.

  Further, by forming the concave and convex strips 3a and 3b of the door body 3 by bending a single metal plate in a meandering manner in the lateral direction, the number of welded portions is reduced, and problems such as distortion of the door body are eliminated.

  Furthermore, by attaching the spread prevention material 7 extending in the lateral direction to the upper position of the downstream surface of the door body 3, it is possible to prevent the uneven strips 3a and 3b of the door body 3 from spreading in the lateral direction due to the water pressure. Will be able to prevent.

  The depths D1 and D2 of the uneven strips 3a and 3b of the door body 3 of the above embodiment were D1 / D2 = 0.5 / 1. However, as shown in FIG. 6, the depth of the uneven strips 3a and 3b. D1 / D2 may be D1 / D2 = 1/1. Further, the end portions of the trapezoidal parts 3c and 3d can be connected to each other to form the concave and convex strips 3a and 3b.

It is front sectional drawing of the waterway provided with the undulation gate of embodiment of this invention. It is side surface sectional drawing of FIG. It is a door body and a rotating shaft, (a) is a principal part front view, (b) is a side view of (a). It is a principal part perspective view of a door body. It is a door body, (a) is a principal part top view, (b) is a principal part front view, (c) is a side view. It is the door body of a modification, (a) is a principal part top view, (b) is a principal part front view, (c) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waterway 2 Rotating shaft 3 Door body 3a Concave strip 3b Convex strip 4 Unfolding gate 7 Spread prevention material D Lodging position U Standing position P Space | interval D1, D2 Depth

Claims (4)

A hoisting gate provided with a door body supported at the bottom of the water channel and rotatable between an upstream standing position and a downstream lying position,
The door body is formed with vertical concavo-convex ridges uneven in the upstream and downstream directions at predetermined intervals in the lateral direction ,
An undulation gate, characterized in that a spread preventing material extending in a lateral direction is attached to an upper position of a surface on the downstream side of the door body .   The undulation gate according to claim 1, wherein the depth of the ridges of the door body is formed so as to gradually become shallower from the lower end rotation side toward the upper end overflow side.   The undulating gate according to claim 1, wherein the uneven strip of the door body is formed in a trapezoidal shape that is continuous in a lateral direction in a plan view.   The undulating gate according to any one of claims 1 to 3, wherein the uneven strip of the door body is formed by bending a single metal plate in a meandering manner in the lateral direction.

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