JP2000129660A - Door-falling command device for gate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower a door for a gate, and to maintain the safety of the downstream side surely by automatically detecting the rise of a water level on the stream side of the gate installed at an intake. SOLUTION: The lowering of a lifting device for a door is commanded with the rise of a water level on the upstream side of the gate in the device. A starting means 2 converting a linear motion, in which a float 8 is elevated, into a rotary motion and a rotating means 3 changing the rotary motion of an arm 12 projected from the starting means 2 into a motion, in which a box 16 fixed onto a horizontal shaft 15 in a seesaw shape is rocked vertically, are mounted at that time, an output shaft 4 is connected to the horizontal shaft 15 through a rotational transmission means 20, and a rotating weight 18 is fitted rotatably into the box 16 in the longitudinal direction of the horizontal shaft 15 while holding the horizontal shaft 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-scale sluice for taking water from a pond to an irrigation canal, for example, in which the water level on the upstream side of a sluice such as a pond rises and the flow of dangerous water downstream of the irrigation canal is prevented. The present invention relates to a floodgate door drop command device that detects a rise in the water level and generates a starting force for instructing a drive of the lift device of the door in a falling direction.

[0002]

2. Description of the Related Art Conventionally, in a small sluice gate as described above,
Without using electric power, the rise of water level on the upstream side such as a pond is sensed artificially, the gate of the sluice is manually lowered to stop water intake, and when the water level on the upstream side falls, this is also artificially detected. , And the operation of manually lifting the door is performed.The manual lifting device is provided with a rack standing on the door, a pinion meshes with the rack, and a gear that increases the speed on the pinion shaft. In addition to connecting the input shaft rotated by the handle, the pinion shaft is provided with a ratchet mechanism and a centrifugal brake.

The ratchet mechanism is such that an inner ring having a stopping claw is fitted on a pinion shaft, an internal ratchet wheel is rotatably provided on the outer periphery thereof, and a band brake is attached to the outer periphery of the ratchet wheel. The rotation of the internal ratchet wheel is prevented by tightening, and by rotating the handle to one side in this state, the pinion rotates without the stopping claw of the ratchet being locked to the tooth of the internal ratchet wheel. It raises the door. On the other hand, by loosening the band brake, the internal ratchet wheel is set to be freely rotatable. And the door descends. Therefore, when raising the door, it becomes possible by tightening the band brake, it will fall naturally by loosening it, and in order to prevent sudden drop at that time, it is equipped with a centrifugal brake as described above, almost It is designed to fall at a constant speed.

[0004]

As described above, in the conventional elevating device, the elevation of the water level must be monitored. However, in reality, when it is detected that the water level of the irrigation water has become abnormally high, the floodgate of the water gate is detected. The door was closed by operating the lifting device. However, there are few problems as long as it can be detected,
There was a possibility that the water would suddenly increase at night and cause danger.

[0005] The present invention has been developed to solve the above problems, and when the water level on the upstream side rises abnormally,
This is automatically detected, and the door lifting device is driven to drop the door.

[0006]

A solution according to the present invention is a device for instructing a door elevating device to fall when the water level on the upstream side of a floodgate rises, and converts a linear motion in which a float rises into a rotary motion. Activating means, and a rotating means for converting the rotational movement of the arm protruding from the activating means into a motion for vertically swinging a box fixed in a seesaw shape on the horizontal axis,
An output shaft is connected to the horizontal axis via a rotation transmitting means, and a rotary weight is fitted in the box so as to be rotatable in the front-rear direction with the horizontal axis interposed therebetween.

[0007] The starting means is characterized in that a float is attached to one end of a rope hung on a pulley, a balance weight is connected to the other end, and an arm is protruded from a support shaft of the pulley.

[0008] The rotation transmitting means is characterized in that the horizontal shaft and the output shaft are connected by a chain. However, a chain is most preferable in terms of strength, but a belt or a timing belt may be used.

[0009]

When the water level on the upstream side of the floodgate rises, the float rises and the arm of the activating means pivots downward, so that one end of the box of the rotating means is pushed down according to the pivoting, Since the rotating weight rolls down to the depressed lower side, a strong rotating force is rapidly obtained, and the chain is tightened to surely drive the output shaft to rotate.

[0010] As described above, the rotation of the output shaft releases the brake of the door lifting / lowering device, lowers the door, and closes the water gate. Further, in the door drop command device of the present invention, the upstream side can be used as the downstream side, and the downstream side can be used as the upstream side.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described in detail with reference to the drawings. As shown in FIG. 2, a starting means 2 is provided upstream of a water gate 1 and is driven by the starting means 2 above the water gate 1. An output shaft 4 provided with a rotating means 3 and driven to rotate by the rotating means 3 is connected to an elevating device 6 of a door 5.

As shown in FIG. 1, the starting means 2 hangs a rope 10 on which a float 8 and a balance weight 9 are mounted on a pulley 7 pivotally supported above the water surface, and pulls the pulley 7 as the water level rises. Is designed to rotate. An arm 12 protrudes from the support shaft 11 of the pulley 7 toward the rotating means 3, and a roller 13 is attached to a tip of the arm 12. A stopper 14 for preventing the balance weight 9 from dropping is provided on the arm 12.

As shown in FIG. 1, the rotating means 3 has a rectangular box 16 on a horizontal axis 15 erected in parallel with the support shaft 11 of the pulley 7, and has a longitudinal axis
5 and is fixed to the front side from the center in the longitudinal direction and to the side opposite to the pulley 7 side, and is configured like a seesaw. Further, a protruding piece 17 is provided on the rear side of the box 16 in the lateral direction, and a rotating weight 18 is fitted into the box 16 so as to rotate in the front-rear direction. ) As shown in the figure,
The supporting member 1 serving as a stopper is a state in which the rotating weight 18 is located on the front side and the front side is inclined so as to be slightly lower.
9 is held. In addition, when the above state is maintained, the balance weight 9 of the activating means 2 is located at the uppermost position, and the arm 12 faces the projecting piece 17 of the box 16 and stands up diagonally. is there.

The horizontal shaft 15 is extended to the left and right with respect to the box 16, and the output shaft 4 is connected to the tip of the horizontal shaft 15 on the side of the lifting device 6 via the rotation transmitting means 20. It is provided in parallel with the horizontal axis 15. A connecting portion 21 is provided at an end of the horizontal shaft 15 opposite to the above, to which a manual handle (not shown) is detachably attached.

The rotation transmitting means 20 is provided with a large sprocket 22 on the horizontal shaft 15 and a small sprocket 23 on the output shaft 4.
, And the chain 24 is slightly loosened on both sides.

As shown in FIG. 5, the elevating device 6 engages a pinion 26 with a rack 25 provided upright on the door 5 and is connected to the pinion shaft 27 via spur gears 28,28. An input shaft 29, a ratchet mechanism 31 with a band brake 30, and a centrifugal brake 32 are provided.
Further, a socket 34 is provided at the tip of the input shaft 29 for detachably attaching a manual handle 33.

The ratchet mechanism 31 includes a pinion shaft 2
7, an inner tooth ratchet wheel 36 is provided on the outer periphery of the inner ring 35 so as to be rotatable around the inner ring 35. Inverted U-shaped band brake 30 on the outer circumference
Is hung. One end of the band brake 30 is fixed to a fixed portion (not shown), the other end is a free end, a screw rod 38 is screwed from the free end, and the tip end of the band brake 30 is It is rotatably fixed to the end on the fixed side. The output shaft 4 is connected to the rear end of the screw rod 38.

Because of the above structure, the process in which the upstream water level rises and the door 5 falls is described in each of FIGS.
(B) Description will be made with reference to the drawings. In each of the figures, the horizontal axis 15 is displayed vertically, and the state of the box 16 and the state of the chain 24 at that time are clearly shown.

FIG. 3A shows a normal water level state, and the float 8 is located above the water level. When the water level rises from this state as shown in (b), the float 8 rises and the pulley 7 rotates in the direction of arrow A, and the arm 12 also rotates in the same direction. A downward force begins to act on the end of the box 16.

When the pushing force of the arm 12 further advances, as shown in FIG. 4A, the inclined box 16 is pressed substantially horizontally, and the horizontal shaft 15 rotates slightly. The lower side of the slightly loose chain 24 becomes tense. At this time, the output shaft 4 is not yet rotated.

When a further downward force of the arm 12 is applied,
As shown in FIG. 4 (b), the rotating weight 18 is
The box 16 tilts sharply,
The output shaft 4 is rotated in the direction of arrow B.

With the rotation of the output shaft 4, the screw rod 38 shown in FIG.
Is loosened, the internal ratchet wheel 36 becomes freely rotatable, and the pinion 26 is also freely rotatable. Therefore, the door 5 falls by its own weight and the sluice 1 is closed.

When the upstream water level falls from the above closed state, the float 8 descends accordingly,
The pulley 7 rotates in the direction of arrow C shown in FIG. 4B, and the arm 12 moves up as shown in FIG. However, in the box 16, the rotating weight 18 is still on the pulley 7 side and is not returned. Then, by manually rotating the horizontal shaft 15 in the backward direction (direction of arrow D), the upper side of the chain 24 is initially tensioned, and further rotation causes the output shaft 4 to rotate in the direction of arrow E. This rotation causes the screw rod 38 to act in the direction of tightening the band brake 30, and after such tightening, the input shaft 29 is manually rotated to raise the door 5 via the pinion 26 and the rack 25. And maintain the raised position.

[0024]

According to the floodgate door drop command device of the present invention, when the water level on the upstream side of the floodgate rises, this is detected by the rise of the float, and the rising force is used effectively to make use of the rising force. Since the lifting device is released and the door is lowered by its own weight, there is no need to artificially monitor the rise in the water level, and the safety of the water intake side can be maintained reliably.

Also, the rising force of the float is converted into a rotational force, the box provided in a seesaw shape is tilted via the arm, and the horizontal axis supporting the box also rotates. I can't get the strong force to release it,
Therefore, a large rotation force is required, and a necessary rotation angle is required until the lifting device is opened.Therefore, a rotation weight is provided in the box, and rotation transmission means such as a chain is interposed between the horizontal shaft and the output shaft. By doing so, the rotating weight does not roll at the beginning of tilting the box,
During this time, the rotation transmitting means such as a chain is tensioned, and the rotation weight starts to roll, so that the rotation force is amplified and the lifting device can be driven reliably.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a floodgate door drop command device according to the present invention.

FIG. 2 is a sectional view showing a water gate provided with the door drop command device of the present invention.

FIGS. 3A and 3B are explanatory diagrams showing a first half of a process until a door is dropped.

FIGS. 4A and 4B are explanatory diagrams showing the latter half of the process until the door is dropped.

FIG. 5 is a perspective view showing an outline of a door elevating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sluice gate 2 Starting means 3 Rotating means 4 Output shaft 5 Door 6 Elevating device 7 Pulley 8 Float 9 Balance weight 11 Pulley support shaft 12 Arm 15 Horizontal shaft 16 Box 18 Rotating weight 20 Rotation transmitting means 24 Chain

Claims (3)

[Claims] An apparatus for instructing a rise and fall device (6) of a door (5) to fall as the water level on the upstream side of a floodgate (1) rises, wherein the rising linear motion of a float (8) is converted into a rotary motion. The rotational movement of the starting means (2) for converting and the arm (12) protruding from the starting means (2) is changed to a movement for vertically swinging a box (16) fixed in a seesaw shape on the horizontal axis (15). A rotating means (3) for conversion and an output shaft (4) are connected to the horizontal axis (15) via a rotation transmitting means (20), and a rotary weight (18) is placed in the box (16). (15) A floodgate door drop command device which is fitted so as to be rotatable in the front-rear direction across the (15). The starting means (2) is provided with a float (8) attached to one end of a rope (10) hung on a pulley (7), a balance weight (9) connected to the other end, and a pulley (7). 2. The floodgate door drop command device according to claim 1, wherein an arm (12) protrudes from the support shaft (11). 3. 3. The rotation transmitting means (20) has a horizontal axis (1).
3. The floodgate door drop command device according to claim 1, wherein the output shaft and the output shaft are connected by a chain. 4.