JP2014043730A - Device for opening/closing waterway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for opening/closing a small-sized waterway by lifting/lowering a partition plate, which dispenses with the need for a screw shaft.SOLUTION: A pair of right and left guide frames is provided on both banks of a waterway in the state of facing each other, and a partition plate is ascendably/descendably fitted into the guide frames. A drive shaft is vertically and rotatably supported on the partition plate, and an operating handle is provided at an upper end. A brake rod is supported in a horizontally movable manner on the partition plate, and an oval cam is provided on the drive shaft to press the brake rod against the guide frames by pushing the brake rod outward.

Description

  The present invention relates to an apparatus for opening and closing a waterway for agriculture or the like.

  In a conventional open / close device for small waterways for agriculture, etc., a screw rod with a male thread extends upward from the partition plate, and a handle engaged with this screw rod is turned up and down to raise and lower the partition plate. It comes to adjust. This type of device has a simple structure, few failures, and has been widely used in small waterways. However, there is a problem that a long screw rod having a female screw engraved on the peripheral surface is necessary, and the production cost is high.

  It is an object of the present invention to provide a water channel opening and closing device that does not require a long screw rod in order to reduce manufacturing costs.

  This waterway partitioning device includes a pair of left and right guide frames that are erected so as to face both sides of the waterway, a partition plate that is fitted in these guide frames so as to be movable up and down, and a vertical and perpendicular to the partition plate. A drive shaft that is rotatably supported and has an operation handle at its upper end, a brake rod that is supported by the partition plate so as to move in a horizontal direction, and for pushing the brake rod outward so as to press the guide frame. The oval cam is fixed to the drive shaft.

  In this device, the partition plate can be manually raised and lowered by grasping the handle, and in order to hold the partition plate at a desired height, a brake rod supported so as to move horizontally along the partition plate; An oval cam fixed to the drive shaft is provided to push the brake rod outward so as to press the brake rod against the guide frame. The cam can be rotated by turning the handle. If the brake rod is pushed outward by the cam, the tip is pressed against the guide frame and the brake is applied. The brake rod is preferably formed of an elastic body in order to make it difficult to come off.

  In this way, the water channel opening and closing device according to the present invention raises and lowers the handle by raising and lowering the handle, and when the handle is rotated, the brake rod is pressed against the guide frame via the cam, and the hand is released from the handle. Also, the partition plate maintains its position. Thus, this apparatus has a simple structure and can be provided at a low cost.

It is a front view of the opening and closing device of the water channel in the closed state. It is a longitudinal cross-sectional view of the same device in the same state. It is a front view of the opening and closing device of the water channel in the state where the water channel is opened. It is AA sectional drawing of FIG.

  As shown in the drawing, a steel back plate 3 is fixed to the water channel 1 at a right angle. The back plate 3 has a water passage hole 3a in the lower part, and the upper part is cut out in a U-shape to form a water overflow part 3b during flooding. A pair of left and right guide grooves 9 are formed by attaching the angle members 7 having an L-shaped cross section through each of them. A square partition plate 11 is fitted between these guide grooves so as to be movable up and down. As shown in FIG. 4, a strip-shaped seal packing 13 is provided along the peripheral edge of the partition plate 11 so that water does not leak from between the partition plate 11 and the back plate 3. The upper ends of the left and right angle members 7, 7 are connected by a connecting member 15.

A drive shaft 17 is vertically and rotatably attached to the partition plate 11. Reference numeral 19 denotes a bearing. The drive shaft 17 extends upward through the connecting member 15, and a T-shaped operation handle 21 is fixed to the upper end.
This apparatus includes a brake 23 for holding the partition plate 11 at an arbitrary height. As shown in FIG. 4, this brake is supported on an oval cam 25 such as an ellipse fixed to the drive shaft 17 and a partition plate so that it can move horizontally at the same height as the cam. And a pair of left and right brake rods 27. Each brake rod 27 is slidably supported in a cylindrical guide fixed to the partition plate 11. The brake rod 27 is made of an elastic body such as rubber, and an outer end thereof forms an inclined surface 27a.

  1 and 2 show a state in which the partition plate 21 is fully lowered and is in contact with the stopper 29. In this state, the water passage hole 3a of the back plate 3 is blocked by the partition plate, and the water channel 1 is closed and no water flows. When flowing water through the water channel, the operation handle 21 is held and the partition plate 21 is lifted manually. When the partition plate is pulled up to a desired height, the operation handle 21 is rotated as shown in FIG. 4 so that the major axis direction of the cam 25 is directed to the axial direction of the brake rod 27. If it carries out like this, both brake rods will be pushed outside by a cam, each tip of these rods will press-contact to the angle material 7, and a brake will be applied. Therefore, even if the hand is released from the handle 21, the partition plate 11 can maintain its position (height) without being lowered.

  When the partition plate 11 is lowered (or raised), the direction of the handle 21 is changed again, and the major axis direction of the cam is directed to the direction perpendicular to the brake rod 27. Thus, the brake rod 27 is not pushed by the cam, the brake is released, and the partition plate can be raised and lowered freely.

DESCRIPTION OF SYMBOLS 1 Waterway 3 Back plate 4a Support member 7 Angle material 9 Guide groove 11 Partition plate 17 Drive shaft 21 Operation handle 23 Brake 25 Cam 27 Brake rod

Claims (2)

  A pair of left and right guide frames erected so as to oppose both sides of the water channel, a partition plate fitted in these guide frames so as to be movable up and down, and vertically and rotatably supported by the partition plate, an upper end A drive shaft having an operation handle on the door, a brake rod supported by the partition plate so as to move horizontally, and fixed to the drive shaft for pushing the brake rod outward so as to press the guide rod against the guide frame. A water channel opening and closing device composed of an oblong cam.   The water channel opening and closing device according to claim 1, wherein the brake rod is formed of an elastic body.

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