JPH0432889B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic device for gates installed in various waterways such as rivers and agricultural waterways.

BACKGROUND ART Gates are installed in various waterways such as rivers and agricultural waterways, and when the water level rises to a predetermined level, a float detects this and automatically overturns or lowers the gate body. The automatic device for this type of gate consists of a pawl gear connected to an operating handle and a stopper that engages and disengages from the pawl gear, and when the water level rises to a predetermined water level, the rotating member to which the stopper is attached is rotated. There is a device in which the stopper is separated from the pawl gear, and the pawl gear is rotated in the direction of overturning the door body or the direction of lowering the door body, thereby overturning or lowering the door body.
The pawl gear is connected to the gate installed in the waterway via wires, racks, etc., and when the door overturns or descends, the pawl gear is connected to the pawl gear due to its own weight, water pressure, etc. produces an extremely strong rotational force.
For this reason, in this kind of conventional automatic device, when the stopper is disengaged from the pawl gear, a reaction force is generated in the stopper due to the rotational force of the pawl gear and the rotation of the rotating member, so that the stopper is no longer necessary. In some cases, the door body becomes bent or deformed and gets caught in the pawl gear, impeding the rotation of the pawl gear and making it difficult or impossible for the door body to fall down.

SUMMARY OF THE INVENTION Therefore, the present invention has been made with the object of providing an automatic gate device which eliminates the drawbacks of the conventional ones. The rotary member is connected to the rotary member using a connecting body such as a strong plate spring, so that when the water level rises and the stopper separates from the pawl gear, the above-mentioned forces will cause the stopper to separate from the pawl gear. This prevents the stopper from bending and deforming and getting caught in the pawl gear, and the stopper is quickly separated from the pawl gear to ensure that the door body falls or descends. Embodiments of the present invention will be described above with reference to the drawings, taking the undulating gate as an example.

FIG. 1 is a front view of a undulating gate according to the present invention;
FIG. 2 is a side view, in which numeral 1 denotes a door body rotatably installed in a river, and is disposed between side walls 2 and 3 fixedly installed on both sides of the river. The door body 1 is pivotally supported by a rotating shaft 5 of a pedestal 4 fixed to the river bed, and rotates around the rotating shaft 5 to rise and fall. 6 is a reinforcing drum attached to the upper part of the door body 1.

Reference numeral 7 denotes a box body disposed on the side wall 2, and an automatic device for automatically overturning the door body 1, which will be described in detail later, is disposed within the box body 7. Reference numeral 8 denotes a float for water level detection arranged in a space 9 formed inside the side wall 2. When river water flows into the space 9 from the water inlet 10, the float 8 rises due to buoyancy. The automatic device is activated and the door body 1 is overturned.

Next, while referring to FIGS. 3 to 6, the box 7 is
This section explains the automatic equipment installed inside the facility.

Reference numeral 11 denotes a base plate attached to the inner wall surface of the box body 7, and the tip of the rotary plate 12 is placed on the upper surface of the base plate 11. The rear end of the rotating plate 12 is
It is supported by a long rod 13 protruding from the float 8,
When the float 8 rises, the rotating plate 12 rotates using its tip as a fulcrum, as shown by the chain line in FIG. 3
Reference numeral 9 is a support member for the rear end of the rotary plate 12 attached to the long rod 13, and 33 and 34 are retainers.

Reference numeral 15 denotes a first rotating member disposed below the rotating plate 12, and its rear end is rotatably supported by a pin 16 on a base plate 17 attached to the inner wall surface of the box body 7. . Reference numeral 18 denotes a second rotating member, the lower end of which is rotatably connected to the first rotating member 15 by a pin 19. Further, the upper end of the rotating member 18 is connected to the rotary plate 12 via a connecting rod 20. Therefore, when the float 8 rises and the rotating plate 12 rotates as shown by the chain line in FIG.
0, and both rotating members 15 and 18 are pulled up to the fourth position.
It rotates as shown by the chain line in the figure.

21 is a pawl gear attached to the winding shaft 22, and the free end 23a of the stopper 23 is engaged with the pawl gear 21. The rear part of the stopper 23 is connected to a rotating member 25 via a spring plate 24.
is attached to. Further, a locking portion 18a formed in a rear portion of the second rotating member 18 is engaged with a side portion of the rotating member 25.
5 is rotated in the direction of arrow c by the rotational force of the pawl gear 21 to prevent the stopper 23 from separating from the pawl gear 21. Also, the rear end portion 18 of the rotating member 18
The lower surface of a is such that when the rotating member 18 rotates to the position indicated by the chain line in FIG.
It has a smooth tapered surface so that it can be removed from the side with good sensitivity. 32 is a rotating shaft of the rotating member 25 which is pivotally attached to the side end of the rotating member 25. As shown in FIG. When the stopper 23 is engaged with the pawl gear 21, it can be bent downward as shown by the chain line in FIG. 5 due to the flexibility of the spring plate 24. Winding direction (5th
Although it is allowed to rotate in the direction of arrow a in the figure, it is prevented from rotating in the direction in which the door plate 1 falls (in the direction of arrow b in Figure 5). Reference numeral 35 denotes a connecting body made of a high-strength leaf spring, which connects the rotary member 25 to a rear portion of the stopper 23 relative to the free end 23a. That is, the water level rises to a predetermined water level, and the locking portion 18a of the rotating member 18 is disengaged from the rotating member 25, and the rotating member 2
5 rotates in the direction of arrow c, a reaction force P in a direction opposite to the rotational direction of the rotating member 25 and a rotational force F of the pawl gear 21 act on the stopper 23. Here, if the connecting body 35 were not present, the stopper 23 would be bent or deformed by these forces P and F, and the free end 23a of the stopper 23 would be connected to the pawl gear 21.
Due to this, it did not easily separate from the pawl gear 21,
Rotation of the pawl gear 21 in the direction of overturning the door body, that is, overturning of the door plate 1 becomes difficult or impossible. However, in this device, since the stopper 23 is connected to the rotating member 25 by the connecting body 35 as described above, the force P applied to the stopper 23,
Even if F acts, the stopper 23 will not be bent and deformed and hit the pawl gear 21. Note that even if the connecting body 35 is configured as described above, the stopper 23 is slightly bent to allow the pawl gear 21 to rotate in the door winding direction. Further, FIG. 6 is a bottom view of the vicinity of the rotating member 25.

Reference numeral 26 denotes a wheel for winding the winding wire 27, which is connected to the winding shaft 22 via rotary wheels 28, 29 and a chain 30, and rotates together with the winding shaft 22 to wind up or unwind the wire 27. . Further, the tip of the wire 27 is attached to the door body 1. The door body 1 is always subjected to a force in the direction of overturning due to the rotational moment due to its own weight and backwater pressure. Therefore, the pawl gear 21 connected to the door body 1 via the wire 27 always prevents the door body 1 from overturning. However, this rotation is blocked by the stopper 23 to prevent the door body 1 from falling over. 31 is an operating handle connected to the winding shaft 22, and the handle 31 is operated to remove the wire 27.
is rolled up and the door body 1 which has fallen down on the riverbed is erected.

This device has the above-mentioned configuration, and its handling operation will be explained next.

Normally, the door body 1 stands up as shown by the solid line in FIG. 2 to block the river. In this state, the stopper 23 engages with the pawl gear 21 to prevent the pawl gear 21 from rotating in the direction of arrow b in FIG. 5 and the door body 1 from falling over. When the water level of the river rises, the river water enters the space 9 through the water inlet 10, and the float 8 rises due to buoyancy. Then, the long rod 13 rises and the rotating plate 12 rotates to the position indicated by the chain line in FIG. Then, the rotating members 15 and 18 are pulled up by the connecting rod 20, and the engaging portion 18a of the rotating member 18 is pulled up by the rotating member 25.
depart from. Then, the rotating member 25 becomes the pawl gear 21
The stopper 23 is rotated in the direction of the arrow c by the rotational force, and the free end 23a of the stopper 23 is quickly and reliably disengaged from the pawl gear 21. Then, the pawl gear 21 becomes freely rotatable, the door body 1 falls over due to its own weight and water pressure, and the river water flows downstream (see the chain line in Figure 2). In the above operation, the rotating plate 12
Since the rotary member 18 rotates on the basis of the lever principle, it can be rotated with a small amount of force. Further, since the lower surface of the rear end portion 18b of the rotating plate 18 is a smooth tapered surface, it can rotate smoothly while being in contact with the upper surface of the rotating member 25. Therefore, according to this device, when the float 8 receives only a slight buoyancy force, the engaging portion 18a of the rotating member 18 easily disengages from the rotating member 25, and the pawl gear 21 moves in the direction in which the door body 1 falls ( Since it rotates in the direction of arrow b), when the water level of the river rises to a predetermined water level, this is detected with high sensitivity and the door body quickly overturns. Further, when the door body 1 is to be raised, the handle 31 is operated to wind up the wire 27, and the door body 1 is pulled by the wire 27 and raised.

7 to 9 show other embodiments of the present invention, in which the rear part of the stopper 23 from the free end 23a and the rotating member 25 are connected to each other with a substantially square cross section. The connecting body 37 prevents the stopper 23 from bending and deforming due to the forces P and F mentioned above.

The present invention can be further modified in various designs, and the point is that the portion rearward of the free end of the stopper and the rotating member are connected by a connecting body to reduce the above-mentioned force when the stopper separates from the pawl gear. It is sufficient that P and F can reliably prevent the stopper from bending and deforming and catching on the pawl gear. Therefore, the shapes of the stopper, rotating member, connecting body, etc. may be as exemplified in the above embodiments. It is not limited to. Furthermore, although the above embodiment has been described using an example of a lift type gate, the present invention can also be applied to a lift type gate in which the gate body is raised and lowered to open and close a waterway.

As explained above, the automatic gate device according to the present invention is connected to the gate body 1 installed in the waterway, and the pawl gear 21 is connected to the operating handle 31.
and a stopper 23 whose free end 23a engages and disengages from the pawl gear 21 and prevents the pawl gear 21 from rotating in the door body falling direction or door body downward direction in the engaged state. The rear part of the stopper 23 is attached to a rotating member 25 that rotates as the water level detection float 8 rises, and the rear part of the stopper 23 from the free end 23a and the rotating member 25 are connected by connecting bodies 35 and 37. Because they are connected, when the stopper 23 is separated from the pawl gear 21, the stopper 23 will not be bent or deformed due to the rotational force F of the pawl gear 21 or the reaction force P caused by the rotation of the rotating member 25. Without,
The stopper 23 reliably separates from the pawl gear 21, and the door body falls or descends.

[Brief explanation of drawings]

The figure shows an embodiment of the present invention.
The figure is a front view of the gate, Figure 2 is a side view, Figure 3 is a perspective view of the automatic device, Figures 4 and 5 are a partial side view, Figure 6 is a partial bottom view, and Figure 7 is the invention of the present invention. FIGS. 8 and 9 are partial perspective views of other embodiments, and FIGS. 8 and 9 are partial side views. 1... Door body, 8... Float for water level detection, 21...
Pawl gear, 23... Stopper, 23a... Free end portion, 25... Rotating member, 31... Operating handle, 35, 37... Connecting body.

Claims (1)

[Claims] 1. A pawl gear that is connected to a gate installed in a waterway and connected to an operating handle, and its free end engages and disengages from the pawl gear, and the door body of the pawl gear falls in the engaged state. The rear part of the stopper is attached to a rotating member that rotates as the water level detection float rises, and the rear part of the stopper is attached to the rear part of the free end of the stopper and the above-mentioned part. An automatic gate device characterized in that a rotating member is connected to the rotating member by a connecting body.