JPH0336579Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a water gate opening/closing device that changes the amount of water flowing through a water gate installed in an agricultural waterway or the like.

(Prior art) Conventionally, this type of water gate opening/closing device has a vertical screw threaded portion fixed to a horizontal operation ring, and the screw threaded portion is screwed into a female thread of a support frame and further extended. The former is pivotally attached to the water gate, and a continuous engaging tooth is carved in the middle part of the operating rod, and a retaining pawl that engages with the engaging tooth and suspends the water gate is fixed in the support frame above the water gate. The latter includes a projecting spring interposed within the support frame that presses and biases the engaging tooth surface of the operating rod toward the locking pawl.

(Disadvantages of the prior art) In the former, due to rust due to long-term use, the screw thread part and the female thread become integrated and cannot be opened or closed.

In the latter case, the operating rod must be constantly raised and pushed down against the force of the projectile, and opening and closing operations are similarly troublesome.

(Problems to be Solved by the Invention) The problem to be solved by the invention is to provide a water gate opening/closing device that improves workability when opening and closing a water gate.

(Means for solving the problem) The technical means taken to solve the above problem is to form the upper half of the operating rod whose lower end is pivoted to the water gate into a polygonal cross-section, and to The upper half is rotatably connected to the lower half, and a support arm for guiding the upstream tilting of the operating rod is provided in a manner protruding from the weir, and the support arm is connected by a spindle. It is formed from a single plate spring, and an engagement groove is carved into the inner surface of the plate spring, with which the corner portion elastically engages when the operating rod is rotated in a vertical position.

(Function) The effect of the technical means of the present invention is to elastically engage the corner part with the engagement groove of the support arm, and to resist the elastic force of the support arm, so that the vertical operating rod is held in a pinched state. Then, the operating rod, which has been tilted upstream under the guidance of the support arm, is lifted upwards or pushed downwards to open and close the water gate, and its operation is performed again. The open/closed state of the water gate is maintained by rotating the rod vertically and elastically engaging the corner portion with the engagement groove to hold the operating rod.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The water gate 1 opens and closes a flow channel 4a opened in a weir 4 that dams a stream or waterway, etc., and is installed inside a guide rail 6 attached to a vertical surface 4b of the weir 4 so as to sandwich the flow channel 4a. An operating rod 2 is connected to this water gate 1 with its lower end pivotally supported.

The water gate 1 is composed of a rubber plate 1a having an area large enough to close the flow path 4a, and a metal reinforcing plate 1b lined on the back surface of the rubber plate 1a.

The operating rod 2 is for opening and closing the water gate 1, and consists of a rod-shaped upper half 2a and a lower half 2b that branches into two from the lower end of the upper half 2a, and near the lower end of the lower half 2b. The sluice gate 1
Connect to. Further, the operating rod 2 has a protrusion 2b' that protrudes into the guide rail 6 at the lowermost end below the pivot point 1c' with the arm piece 1c, and a lower half 2b'.
It is rotatably fitted loosely into a rotation guide cylinder 2d formed at the upper end of b via a washer 7 formed at the lower end of the upper half 2a excluding the small diameter part 2e, and the small diameter part 2e is The weir 4 is formed into a polygonal shape such as a rectangle, and a support arm 3 is formed protruding from the weir 4 to guide the tilting movement of the operating rod 2 toward the upstream side.

The support arm 3 is connected to two leaf springs 3a, 3a so as to sandwich the upper half 2a of the operating rod 2 from the weir 4.
is formed by protruding and connecting its tips with a support shaft 3b for adjusting the spacing, and the corner portion 2c is elastically engaged with the inner surface of the leaf spring 3a when the operating rod 2 is rotated vertically. An engaging groove 5 for holding the operating rod 2 therein is formed. The support shaft 3b is supported by two leaf springs 3 as shown in the figure.
a bolt 3b' installed in a penetrating manner across a;
The nut 3b'' is screwed onto the bolt 3b', and the tightening degree of the nut 3b'' can be adjusted.

Next, the usage status of the water gate opening/closing device of the present invention will be explained.

FIG. 1 shows the closed state of the flow path 4a, and the operating rod 2
is in a state where the corner portion 2c is elastically engaged with the engagement groove 5 of the support arm 3. From this state, as shown in FIG.
After rotating the operating rod 2 so as to be parallel to the vertical surface 4b of the corner 2c and disengaging the engagement groove 5,
As shown in FIG. 7, the operating rod 2 is tilted toward the support shaft 3b and brought into contact with the support shaft 3b. Then the 8th
When the operating rod 2 is lifted upward as shown in the figure and rotated again as shown in FIG. is held in place to maintain the open state of the water gate 1.
Although not shown, it goes without saying that when the water gate 1 is closed, the elastic engagement between the corner 2c and the engagement groove 5 is released and the water gate 1 is pushed downward.

Incidentally, when the operating rod 2 returns to its original state around the pivot point 1c' as shown in Figures 9 and 10, the protrusion 2b' collides with the guide rail 6 and pivots due to the action of the lever. Since the slave point 1c' is pressed to bring the water gate 1 into closer contact with the weir 4, there is no risk of water leakage.

(Effects of the invention) Since the invention is constructed as described above, the corner of the operating rod formed into a polygonal cross-section can be elastically engaged with the engagement groove of the leaf spring that protrudes from the weir and forms the support arm. The water gate can be opened and closed by releasing the lock and pulling it upwards or pushing it downwards, so it can be opened and closed by the rotational relationship between the screw thread part and the female screw as in the past, or by the locking teeth by a bullet. If the operating rod is always pressed against the locking claw formed in the support frame, it may become impossible to open or close due to rust, or the operation of opening and closing the water gate may be difficult due to the force of the projectile. There is no need to force the operation, and the opening and closing of the water gate is not only easy but also reliable, and the structure is simple, so there is no failure.

[Brief explanation of the drawing]

The drawings show the opening/closing device of the water gate of the present invention, FIG. 1 is a front view, FIG. 2 is a plan view with a part cut away, FIG. 3 is a 3-3 sectional view, FIG. 4 is a 4-4 sectional view, Figure 5 is a partially cutaway plan view of the water gate opening and closing.
Figure 6 is a 6-6 sectional view, Figure 7 is a 6-6 sectional view showing the state in which the operating rod is tilted, Figure 8 is a 6-6 sectional view showing the sluice gate in a lifted state, and Figure 9 is a 6-6 sectional view. The figure is a 6-6 sectional view showing the state in which the operating rod has been moved to its original vertical position from Fig. 8, and Fig. 10 is a sectional view of the same when the operating rod is rotated so that the corner part elastically engages with the engagement groove. 6-6 cross-sectional view and FIG. 11 are plan views partially cut away. In the figure, 1...water gate, 2...operating rod, 2a...upper half, 2b...lower half, 3...support arm, 4...
Weir, 3b... Support shaft, 3a... Leaf spring, 5... Engagement groove, 2
c... Corner of the operating rod.

Claims (1)

[Scope of utility model registration request] The upper half of the operating rod whose lower end is pivotally supported on the water gate is formed into a polygonal cross section, and the upper half of the operating rod is rotatably connected to the lower half, so that the operating rod can be tilted upstream. A support arm is provided to protrude from the weir, and the support arm is formed by two leaf springs connected by a support shaft, and the inner surface of the leaf spring has an operating rod that is vertically rotated. A water gate opening/closing device with an engaging groove carved into the corner that elastically engages.