JPH0995924A - Regulating device for water channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the smooth ascend-descending motion of a rack lever without its inclination even when the rack lever is greatly protruded upward from a gear in order to raise a door body from a river bed through the rotation of the gear engaging with the rack lever erected on the upper part of the door body. SOLUTION: Right and left gears 3, 4 engaging with the rack teeth 2a of a rack lever 2 erected on the upper part of a door body 1 and a roller 6 abutting on the rack lever 2 are provided, and the rack lever 2 is therefore three- point supported on both sides by the two gears 3, 4 and one roller 6. When the gears 3, 4 are rotated, the door body 1 ascends and descends on the river bed 5. But even when the door body 1 is greatly risen to greatly protrude the rack lever 2 upward from the gears 3, 4, the rack lever 2 does not incline because it is three-point supported, and the rack lever 2 can therefore ascend and descend smoothly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water control device for a water channel provided with a lifting type door body.

[0002]

2. Description of the Related Art As a means for raising and lowering a water control door body installed in a waterway or the like, a rack rod is erected on the upper portion of the door body, and gears are manually operated by engaging gears from the left and right with the rack teeth. It is known that the door body is moved up and down by being rotated by power (Japanese Utility Model Publication No. 1-8572).
FIG. 2 illustrates what is described in the publication, in which gears 3 and 4 are arranged in different steps by providing a step T, and a rack rod 2 is arranged to be swingable right and left. The tooth portions 3a and 4a of the gears 3 and 4 are alternately engaged with and disengaged from the rack teeth 2a of the rack rod 2 provided upright on the door 1. According to this structure, the tooth portions 3a and 4a of the left and right gears 3 and 4 are alternately engaged with and disengaged from the rack tooth 2a, and the rack rod 2 is alternately applied with the oblique force F1 from the tooth portions 3a and 4a. , F2 can be smoothly moved up and down while swinging left and right (see the waveform arrow). d is its amplitude.

[0003]

However, in the above-mentioned conventional one, when the door body 1 is greatly raised from the riverbed 5,
The rack rod 2 projects largely above the gears 3 and 4, and as a result, the rack rod 2 rotates in the direction of the arrow N and largely tilts,
There is a problem that the lifting and lowering operation of the rack rod 2 is likely to be disabled.

Therefore, according to the present invention, the rack rod is not inclined even if the rack rod is projected upward from the gear in order to raise the door body from the riverbed, and the rack rod can be smoothly moved up and down. An object of the present invention is to provide a water control device for a water channel.

[0005]

To this end, according to the present invention, the rack teeth of a rack rod erected on the upper portion of the door body are engaged with gears from the left and right, and the door body is raised and lowered by the rotation of these gears. In the water control device for the water channel, the gears are arranged so as to have steps, and the rack rod is arranged so as to be swingable left and right, and the tooth portions of the gears are arranged on the rack teeth. A roller is provided for preventing the inclination of the rack rod by alternately engaging and disengaging the rack rod and supporting the rack rod together with the gears from the left and right at three points.

In the above structure, the tooth portions 3a, 4a of the left and right gears 3, 4 are alternately engaged with and disengaged from the rack tooth 2a, and the rack rod 2 is alternately subjected to the oblique force F1 from the tooth portions 3a, 4a. , F2 swings left and right to move up and down smoothly.
Then, even if the rack rod 2 is largely projected above the gears 3 and 4 in order to largely raise the door body 1 from the riverbed 5, the rack rod 2 is left and right by two gears 3 and 4 and one roller 6. Since the rack rod 2 is supported at three points, the rack rod 2 can be smoothly moved up and down without inclining.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a water control device installed in a waterway. In FIG. 1, reference numeral 1 denotes a water control door body arranged on a riverbed 5 of a waterway, on which a rack rod 2 is erected so as to be swingable left and right. Reference numerals 3 and 4 are gears, and tooth portions 3a and 4a thereof engage with pin-shaped rack teeth 2a formed on the side portion of the rack rod 2 from the left and right.
Below the gear 3, a roller 6 that comes into contact with the rack teeth 2a is provided. Therefore, the rack rod 2 is supported at three points from the left and right by the two right and left gears 3 and 4 and the one roller 6.

The gears 3 and 4 are arranged at different levels by providing a step T, and the tooth portion 3a of the gear 3 on the left side and the gear 4 on the right side are arranged.
Tooth portions 4a alternately engage and disengage from the rack tooth 2a, so that when one tooth portion 3a engages with the rack tooth 2a, the other tooth portion 4a does not. 2a, and when the other tooth portion 4a is engaged with the rack tooth 2a, the one tooth portion 3a is separated from the rack tooth 2a (see also the chain line in the figure). In FIG. 1, the solid line shows a state in which the tooth portion 4a of the gear 4 on the right side is engaged with the rack tooth 2a of the rack rod 2 and pushes the rack rod 2 upward to the left obliquely by the force F2. The tooth portion 3a of the gear 3 on the left side is engaged with the rack tooth 2a and is pushed upward obliquely to the right by the force F1.

The water control device of the present water channel is constructed as described above, and when the door 1 is raised, the gears 3 and 4 are rotated forward by hand or by the power of a motor or the like. Then, the tooth portions 3a and 4a alternately engage with the rack tooth 2a to push up the rack rod 2. In this case, when the tooth portion 3a of the left gear 3 engages with the rack tooth 2a, The rack rod 2 is pushed obliquely upward to the right by the diagonally upward force F1, and when the tooth portion 4a of the right gear 4 is engaged with the rack tooth 2a, the rack rod 2 is slanted to the left diagonally due to the diagonally upward force F2. It is pushed up. Therefore, the rack rod 2 can be smoothly lifted in a meandering shape (see the waveform arrow) while swinging left and right by the forces F1 and F2 that act alternately. d is its amplitude. Similarly, when the gears 3 and 4 are reversely rotated when lowering the door body 1, the rack rod 2 is alternately pushed by the tooth portions 3a and 4a and swings to the left and right to descend.

Further, when the door body 1 greatly rises from the riverbed 5, the rack rod 2 projects largely above the gears 3 and 4, but the rack rod 2 is left and right by two gears 3 and 4 and one roller 6. Since the rack rod 2 is supported at three points, the rack rod 2 does not greatly incline as in the above-mentioned conventional example, and the rack rod 2 can be held in a substantially vertical posture and smoothly moved up and down. The present invention is not limited to the above-described embodiment. For example, the roller 6 may be brought into contact with the side surface of the rack rod 2, or a second roller or a third roller that is brought into contact with the rack rod 2 may be provided. It's good.

[0011]

According to the present invention, the rack rod 2 has two gears 3 even if the rack rod 2 is largely projected above the gears 3 and 4 in order to largely raise the door body 1 from the river bed 5. , 4
Since one roller 6 supports three points from the left and right, the rack rod 2 does not incline, and the rack rod 2 can be held in a substantially vertical posture and moved up and down smoothly.

[Brief description of drawings]

FIG. 1 is a side view of a water control device for a waterway.

FIG. 2 is a side view of a conventional water control device for a water channel.

[Explanation of symbols]

 1 Door 2 Rack rod 2a Rack tooth 3,4 Gear 5 Riverbed 6 Roller

Claims (1)

[Claims] 1. A water control device for a water channel, wherein gears are engaged from left and right with rack teeth of a rack rod provided upright on an upper portion of the door body, and the door body is moved up and down by the rotation of these gears. While arranging the respective gears with a step,
The rack rod is disposed so as to be swingable right and left, and the tooth portions of each gear are alternately engaged with and disengaged from the rack teeth,
Further, there is provided a water control device for a water channel, which is provided with a roller that abuts on the rack rod and supports the rack rod together with the respective gears from the left and right at three points to prevent the rack rod from being inclined.