JPH0262646B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic locking device for gates installed in various waterways such as rivers and agricultural waterways. It is designed to automatically engage the pawl gear to prevent the door body from falling or falling.

BACKGROUND ART Gates are installed in various waterways such as rivers and agricultural waterways, and when the water level rises to a predetermined level, the gate is detected by this and a float and the gate body is automatically overturned or lowered. This type of gate is generally constructed by connecting a gate body rotatably or vertically installed in a waterway to a pawl gear connected to an operating handle via wires, racks, etc., and the water level is maintained at a specified level. When the water rises to the water level and the float floats up, the stopper that is interlocked with the float and engages with the pawl gear is disengaged from the pawl gear, and the door body is moved to the riverbed by the backwater pressure of the rotational moment due to its own weight. It is designed to be tipped upward or lowered by its own weight. Conventionally, when raising or raising a door body that has fallen or fallen in this way, the door body is raised or raised by operating the handle, winding up a wire, etc., and then manually tightening the stopper with the claw. It was designed to engage a gear to prevent the door from falling or falling. However, the work of engaging the stopper with the pawl gear in this way is quite troublesome, as the stopper and the pawl gear are generally arranged within a relatively small box body.
Furthermore, if an inexperienced person performs the above-mentioned work, there is a risk of injury to hands and fingers. Furthermore, there has been a strong desire to develop an automatic locking device, especially for gates whose gates are raised and lowered by remote control using a motor or the like.

Therefore, in consideration of the above points, the present invention has a structure in which the stopper is automatically engaged with the pawl gear when the operating handle is operated to raise or raise the door body that has fallen or fallen onto the riverbed. This device was developed for the purpose of providing an automatic locking device for a gate, and includes a pawl gear connected to a hoisting shaft, and a stopper that engages and disengages from the pawl gear in conjunction with the raising and lowering of a water level detection float. , in a gate equipped with a handle for raising/lowering or raising/lowering the door connected to the hoisting shaft, an interlocking element is provided that is displaced in conjunction with the rotation of the hoisting shaft in the direction in which the door is raised or in the direction in which the door is raised; and a locking portion that is locked to a locking body to maintain the state in which the stopper is disengaged from the pawl gear, and the interlocking portion is configured to operate as the hoisting shaft rotates in the direction by operating the operating handle. According to the displacement of the child, the locking body is moved in a direction away from the locking portion, and the stopper is engaged with the pawl gear, whereby the operating handle can be operated. When the door body is erected or raised, the locking portion is disengaged from the locking body and the stopper is automatically engaged with the pawl gear. Hereinafter, embodiments of the present invention will be described with reference to the drawings, taking as an example the case where the present invention is applied to a undulating gate.

FIG. 1 shows an example of a undulating gate to which an automatic locking device according to the present invention is applied.
is a door body that is rotatably installed on the riverbed, and rotates around a rotating shaft 2 at its lower end to rise and fall. 3
is a pawl gear connected to the hoisting shaft 4, and a stopper 5 that is interlocked with a water level detection float (described later) engages and disengages from the pawl gear 3. Reference numeral 6 denotes a handle for raising and lowering the door body 1, which is connected to the hoisting shaft 4. When the handle 6 is operated to rotate the hoisting shaft 4 in the raising direction of the door body 1, the hoisting shaft 4 is rotated. A wheel 10 connected to the door body 4 via rotary wheels 7, 8, an endless chain 9, etc. rotates, the wire 11 is wound up on the wheel 10, and the door body 1 stands up. The structure of such a gate is well known. Next, the main parts of the present invention will be explained with reference to FIGS. 2 to 4.

Reference numeral 12 denotes a ratchet wheel attached to the winding shaft 4, which rotates together with the ratchet gear 4. Reference numeral 13 denotes a rectangular frame that is movable up and down, and a sawtooth body 14 provided vertically inside the frame engages with the ratchet wheel 12. 15 is sawtooth body 14
This is a spring for urging the ratchet wheel 12 toward the ratchet wheel 12 side. An upright rod 16 is erected on the upper part of the frame 13, and a substantially conical interlocking element 1 is provided on the upright rod 16.
7 is installed. Reference numeral 18 denotes a support plate for supporting the upper part of the upright rod 16 so that it can move up and down.

20, 20 are a pair of long plate-shaped locking bodies arranged on the sides of the interlocking element 17, and are
It is installed diagonally at a 45 degree angle. Locking bodies 20, 20
The rear portions of the upper surfaces are vertically attached to support plates 21, 21, and the rear ends of the support plates 21, 21 are rotatably attached to support shafts 22, 22. These support shafts 22, 22 are also inclined at 45 degrees from the horizontal plane. 32 is a spring attached to the support plates 21, 21, and the spring force causes the locking body 20,
20 is biased inwardly. Reference numeral 33 denotes a rod-shaped spacing member protruding from the inner surface of one of the locking bodies 20, and defines the distance between the locking bodies 20. 23 is a bearing for the support shafts 22, 22.

Reference numeral 25 denotes a water level detection float, and on the top of an upright rod 26 erected on its upper surface, there is a rotary plate 28 whose front end is pivoted to the rear end of the stopper 5 via a pin 27. attached. The rear end of the rotary plate 28 is rotatably supported by a support plate 30 by a pin 29, and when the water level of the river rises and the float 25 floats, the rotary plate 28 moves to the upright rod 26.
The stopper 5 is pulled up and rotated counterclockwise in FIG. 2 about the pin 29, and the stopper 5 is also rotated clockwise so that the stopper 5 is separated from the pawl gear 3 (see the chain line in FIG. 2). 31 is a substantially conical locking portion attached to the upper part of the upright rod 26, and as is clear from the above description, the locking portion 31 is connected to the stopper 5 via the rotary plate 28 and the upright rod 26. has been done. The above interlocking element 17
is located below the tips of the locking bodies 20, 20, and the locking portion is located below the substantially central portion thereof. Note that the diameter of the interlocking element 17 is considerably larger than the diameter of the locking part 31. This device has the above-mentioned configuration, and its operation will be explained next.

When the water level of the river is below the planned lodging water level, the second
As shown by the solid line in the figure, the stopper 5 engages with the pawl gear 3 to prevent the door body 1 from falling. At this time, the interlocking element 17 and the locking part 31 are located below the locking bodies 20, 20. When the water level of the river reaches the planned lodging water level, the float 25 floats up, the stopper 5 separates from the pawl gear 3, and the hoisting shaft 4 becomes free.
The door body 1 rotates around the rotating shaft 2 due to the rotational moment due to its own weight and backwater pressure and falls over. At this time, the serrated body 14 is elastically supported by the spring 15, allowing the ratchet wheel 12 to rotate in the direction in which the door falls (counterclockwise) in FIG.

When the float 25 floats up, the engaging part 31 attached to the upper part of the upright rod 26 also rises and hits the lower surface of the locking bodies 20, 20, causing the locking bodies 20, 20 to spring up. It is forcibly rotated around the support shafts 22, 22 against the spring force of 32 and pushed open in a V-shape. When the locking part 31 further rises and reaches above the locking bodies 20, 20, the locking bodies 20,
20 is rotated and closed by the spring force of the spring 32, and the lower surface of the locking portion 31 is locked to the upper surface of the locking bodies 20, 20 (see the chain line in FIG. 2 and FIGS. 3a and 3c).
In this state, the interlocking element 17 is below the locking bodies 20, 20 (see solid line in FIG. 2 and FIG. 3b). With the locking portion 31 locked to the locking bodies 20, 20 in this manner, the stopper 5 maintains a state separated from the pawl gear 3.

When raising the collapsed door body 1, the operating handle 6 is operated to rotate the winding shaft 4 clockwise in FIG. 2. Then, the ratchet wheel 12 also rotates in the same direction, the saw-toothed body 14 engaged with the ratchet wheel 12 moves straight up, and the frame 13 also goes straight up. Then, the interlocking element 17 also rises and the locking bodies 20, 2
0, and forcibly pushes the locking bodies 20, 20 open against the spring 32 (see FIG. 4b). When the locking bodies 20, 20 are pushed open more than the diameter of the locking part 31, the locking part 31 opens the locking body 2.
0,20, and the locking body 31 falls downward due to the weight of the float 25, etc. (see Fig. 4 a, c).
The stopper 5 automatically engages with the pawl gear 3, thereby preventing the door body 1 from falling over (see solid line in FIG. 2). In this way, according to this device, when the operating handle 6 is operated to raise the door body 1 which has been lying down, the stopper 5 automatically engages with the pawl gear 3 and locks the pawl gear 3. .

5 and 6 show other embodiments of the present invention, in which reference numeral 40 denotes a locking body, and the locking body 40
Sliding rods 41, 41 are attached to the rear surface. The sliding rods 41, 41 are slidably inserted into blind elongated holes 43, 43 formed in the support member 42. 44, 44 are the retainers. As shown in FIG. 7, the supporting members 42, 42 have elongated holes 43,
The locking bodies 40, 4 are installed diagonally with the locking bodies facing downward.
0 tries to maintain the downward position (simultaneous solid line position) due to its own weight. Here, as in the case of the first embodiment, when the float 25 floats, the locking part 31 presses against the lower surface of the locking bodies 40, 40,
40 diagonally upward and push it open, and locking body 4
0.40 (see the chain line in FIG. 7B). In addition, by operating the operating handle 6, the interlocking element 1 is
7 is raised, and the locking bodies 40, 40 are pushed back and opened (see FIG. 7a), the locking rod 31 is detached from the locking bodies 40, 40, and falls.
engages with the pawl gear 3 and locks the pawl gear 3.

The present invention can be modified in various ways in addition to the above-mentioned embodiments. For example, although the above-mentioned embodiments have been explained using an undulating gate as an example, it may be an elevating type gate, and locking bodies, locking bodies, etc. There are various possible shapes and structures for the stopper interlocking element, but the key is to provide an interlocker that is displaced in conjunction with the rotation of the hoisting shaft in the door body upright direction or the door body upward direction, and to A stopper that is locked and engaged with and disengaged from the pawl gear connected to the hoisting shaft is provided with a locking part that maintains the disengaged state from the pawl gear, and the above-mentioned operation is performed by operating the handle for raising and lowering the door body or raising and lowering the door body. The locking body is moved in a direction away from the locking part by the displacement of the interlocking element as the winding shaft rotates in the direction, and the stopper is automatically engaged with the pawl gear. do it.

As described above, according to the present invention, when the operating handle is operated to raise or raise the door body,
Since the stopper can be automatically engaged with the pawl gear to lock the pawl gear, there is no need to manually engage the stopper with the pawl gear as in conventional systems, which is extremely convenient for handling operations. It's advantageous.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a partially exploded perspective view of the gate, Figure 2 is a side view of the automatic device, Figures 3 a, b, c and Figure 4 a,
5 is an exploded perspective view of another embodiment of the present invention, FIG. 6 is a plan view, and FIGS. 7a and 7 are front views of essential parts. be. 1... Door body, 3... Pawl gear, 4... Winding shaft,
5...Stopper, 6...Operation handle, 17
... Interlocking element, 20, 40 ... Locking body, 25 ... Water level detection float, 31 ... Locking part.

Claims (1)

[Claims] 1 A pawl gear connected to the hoisting shaft, a stopper that engages and disengages from the pawl gear in conjunction with the rise and fall of the water level detection float, and a handle for raising and lowering the door body connected to the hoisting shaft. In the gate equipped with the above-mentioned gate, an interlock element is provided which is displaced in conjunction with the rotation of the hoisting shaft in the direction of raising the gate body or the direction of raising the gate body, and is latched by a locking body to allow the stopper to separate from the pawl gear. and a locking part that maintains the state, and the locking body is moved in a direction in which the locking body is released from the locking part by displacement of the interlocking element as the winding shaft is rotated in the direction by operating the operating handle. An automatic locking device for a gate, wherein the stopper is moved to engage the pawl gear.