JPS6250605B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water gate opening/closing device using a gear type lifting rod, and an object of the present invention is to provide a water gate opening/closing device that can safely, reliably, and promptly open and close a water gate. shall be.

The present invention will be explained below with reference to embodiments shown in the drawings. In FIGS. 1 to 3, a machine case 1 is separable, and a handle shaft 3 is supported horizontally on a part of its side wall. The handle shaft 3 is fixed by a bearing 33a and a cover 34 so as not to come off. A handle 2 is fixed to the outer end of the handle shaft 3 by normal means (the figure exemplifies a fixing technique using a set screw 2a), and a movable brake plate 4, which will be described later, is fixed to the inner end. A meshing protrusion 3a for meshing with the shaft is provided upright in the radial direction.

An input shaft 14 of a reduction gear train 38 is arranged on the same axis as the handle shaft 3 on opposing side walls of the machine box 1 . That is, the input shaft 14 is pivotally supported on the side wall of the machine box 1 via a drum 29 of a centrifugal brake device 36, which will be described later, on the outside of a small spur gear 14a machined on its outer periphery, and on the inside, it is supported by the inner wall 1a of the machine box 1. is directly supported. This input shaft 14 protrudes outside the side wall of the box 1, and its inner end is machined to have a large diameter as a brake drum 13 of a brake device 37, which will be described later.

The drive shaft 10 is supported at one end by the handle shaft 3, and at the other end by the brake drum 13, and is rotatably arranged on the same axis as these. The drive shaft 10 is located inside the brake drum 13.
Movement of the drive shaft 10 toward the input shaft is restricted by a bearing 35 that supports the input shaft. A male threaded portion 10a is provided on the outer peripheral surface of the drive shaft 10 near the handle shaft 3.
is being processed. Further, a disk-shaped fixed brake plate 9 is fixed to the left side (input shaft 14 side) of this male threaded portion 10a. A cylindrical movable brake plate 4 is screwed into the male threaded portion 10a, and a protrusion at the outer end thereof meshes with the above-mentioned engagement protrusion 3a of the handle shaft 3. The other end of the movable brake plate 4 is machined into a plane perpendicular to the axis, and between this end face and the fixed brake plate 9, a ratchet wheel 6 having pawl teeth 6a on the outer periphery is rotatably mounted on the drive shaft 10. It is pivoted. This pawl tooth 6a is constantly engaged with a pawl 7 fixed to the side wall of the box 1 so as to be movable forward and backward by a compression spring 8 (see Fig. 2).
In reality, it can only rotate in the direction that raises the water gate (clockwise rotation in Figure 2, which is referred to as the normal rotation direction). In this embodiment, disk-shaped friction plates 5, 5, in particular, are inserted and supported on both sides of the ratchet wheel 6.

However, the sum of the gaps between the fixed brake plate 9, movable brake plate 4, ratchet wheel 6, and friction plates 5, 5 of the handle shaft 3, drive shaft 10 is The related dimension is set to be a positive value smaller than the meshing depth.

On the other hand, between the fixed brake plate 9 of the drive shaft 10 and the brake drum 13 of the input shaft 14, a disc-shaped clutch plate 11 of the clutch device 39 is engaged with pawls 11b and 9a extending in the axial direction. is slidably inserted only in the axial direction. The clutch plate 11 is always biased toward the brake drum 13 of the input shaft 14 by a compression spring 12 inserted between the clutch plate 11 and the fixed brake plate 9, and engages the engaging protrusion 11a on the side of the clutch plate 11. brake drum 13
The side meshing recesses 13a mesh with each other. The stroke amount of the clutch plate 11 moving to the right from this meshed state is between the meshing protrusion 11a and the meshing recess 13a.
The amount of engagement is ensured to be greater than the amount of engagement between the two.

Next, the brake device 37 will be explained. On the outer periphery of the brake drum 13 of the input shaft 14, a third
As shown in the figure, a brake band 19, one end of which is fixed to the inner wall of the box 1 by a set screw 19a, is wound around the brake band 19. The other end of the brake band 19 extends horizontally toward the side wall of the machine case 1 and is fixed to the lower surface of a compression spring receiver 20 guided by a guide rod 23 installed horizontally in the machine case 1. The compression spring receiver 20 is inserted between a compression spring force adjustment nut 22 screwed onto the upper part of the guide rod 23, and is constantly biased by the compression spring 21 so as to generate a tightening force on the brake band 19. .

The clutch operating shaft 24 is coaxially supported by the side wall of the machine case 1 with the guide rod 23, and can slide and rotate. A clutch cam 25 is integrally provided on the inner side surface of the clutch operating shaft 24 and protrudes in the radial direction, and its tip is close to the flange-shaped side surface of the clutch plate 11 in the engaged state. At the outer end of the clutch operating shaft 24, an engagement groove 24a of a constant width is cut from above, and the operating lever mounting portion 24 is cut from the side to form two vertical planes.
b is formed. The operating lever 26 has a rectangular square hole 26a at its tip, and a pin 26b is driven laterally into the center of the hole 26a. square hole 2
6a is the width of the mounting portion 24b of the clutch operation shaft 24.
The width of the pin 26b is slightly larger than the width of the engaging groove 2.
It is thick enough to fit into 4a.

An operating lever support 28 having a sufficient width and an L-shaped cross section is installed below the clutch operating shaft 24 on the side wall of the machine case 1.
An operating lever stopper 27, which also has an L-shaped cross section, is provided above the handlebar shaft 4 and on the handle shaft side.

Now, an output shaft 15 is supported next to and parallel to the input shaft 14, and a large spur gear 15a provided integrally with the output shaft 15 meshes with a small spur gear 14a of the input shaft 14. A pinion gear 16 is machined in the center of the output shaft 15, and the machine box 1
A gear rod 17 that is guided by and connects it vertically.
It meshes with the easy teeth of the teeth. This gear rod 17 is
On the opposite side of this meshing point, it is in contact with a presser roller 18 that is pivotally supported on the machine case 1.

Above input shaft 14, small spur gear 14a, output shaft 1
5. The large spur gear 15a and the pinion gear 16 constitute a reduction gear train 38.

Further, the drum 29 of the centrifugal brake device 36 has a stepped cylindrical shape, and a small diameter stepped portion thereof is fitted into the machine case 1, and the input shaft 14 is pivotally supported inside. This input shaft 14 extends to the large diameter portion of the drum 29,
A brake shoe holder 32 is attached to its outer periphery. This brake shoe holder 32
In this case, the brake shoe 3 is connected by the brake shoe pins 31, 31 at both ends of one diameter passing through the center.
0,30 are attached. Brake show 3
Tension springs 33, 33 are tensioned between 0 and 30, and the friction surfaces 3 of the brake shoes 30, 30
0a and 30a are drawn toward each other so as not to contact the inner surface of the drum 29.

The operation and effect of the water gate opening/closing device configured as above will be explained below.

First, if you want to roll up the water gate, use the operating lever 2.
Connect the pin 26b of the square hole 26a of No. 6 to the clutch operation shaft 2.
4 into the engagement groove 24a of the mounting portion 24b from above. The tip of the operating lever 26 is positioned between the operating lever support 28 and the side wall of the box 1. At this time, the operating lever 26 is in a vertical plane perpendicular to the side wall of the box 1, and this is the neutral position of the operating lever 26 (see FIG. 5).

Next, when this operating lever 26 is pressed against the machine case 1 side as shown by the arrow P in FIG. is pushed into box 1. At this time, the inner end of the clutch operating shaft 24 pushes the compression spring receiver 20 against the biasing force of the compression spring 21, breaking the tight contact between the brake band 19 and the brake drum 13.

Next, rotate the operating lever 26 clockwise as shown by arrow Q in FIG.
7, the operating lever 26 is held in this pressed state even if you release your hand, and the brake drum 1
Brake No. 3 is kept in a released state.

Next, when the handle shaft 3 is rotated in the normal clockwise direction by the handle 2, the movable brake plate 4 rotates together with this, and is moved in the direction of the fixed brake plate 9 by the male threaded portion 10a of the drive shaft 10, and the A wheel 6 and friction plates 5, 5 are sandwiched between a fixed brake plate 9. As a result, a frictional force is generated between the movable brake plate 4 and the fixed brake plate 9, and the handle shaft 3
and the drive shaft 10 rotate together as a unit. The clutch plate 11 of the drive shaft 10 is moved toward the brake drum 13 side of the input shaft 14 by the biasing force of the compression spring 12, so that the engaging protrusion 11a and the engaging recess 13a are engaged. As a result, the rotation of the handle 2 is transmitted from the handle shaft 3 and the drive shaft 10 to the input shaft 14, and is further transmitted to the output shaft 15 after being decelerated by the small spur gear 14a and the large spur gear 15a. The rotation of the output shaft 15 is transmitted from the pinion gear 16 to the gear rod 17, and the gear rod 17 rises to pull up the water gate.
At this time, the presser roller 18 prevents the gear rod 17 from curving outward and coming out of mesh due to horizontal outward drag generated at the meshing portion.

In addition, in this process of hoisting, the pawl teeth 6a on the outer periphery of the pawl wheel 6, which is integrated with the handle shaft 3 and the drive shaft 10, are constantly engaged with the pawls 7 on the machine case 1 side. Even if I let go, it doesn't reverse,
The floodgate door will not fall.

If you want to keep the water gate that has been rolled up in this way at a certain position and then rest it, use the hoisting operation described above to roll up the water gate to a predetermined height, and then rotate the operating lever 26 counterclockwise to operate it. Disengage the lever stopper 27 and release your hand at the neutral position. Then, the compression spring receiver 20 moves toward the box wall side by the compression spring 21, and the band brake 19 connected thereto is pulled together and tightly wraps around the brake drum 13, generating a braking force. Therefore, at this time, the reverse rotation prevention by the ratchet wheel 6 and pawl 7 and the above-mentioned braking force on the brake drum work simultaneously, so that the water gate can be safely and reliably stopped at any position.

Next, the case where the water gate door is lowered will be explained.

First, the operating lever 26 in the neutral position is rotated counterclockwise. Then, the clutch operating shaft 24, which engages with the square hole 26a of the operating lever 26, rotates together. The clutch cam 25 fixed to the clutch operating shaft 24 swings to the right in FIG.
The clutch plate 11 is moved to the right while bending the clutch plate 11, and the engagement between the engagement protrusion 11a of the clutch plate 11 and the engagement recess 13a of the brake drum 13 is finally disengaged, and the clutch is disengaged. During this process, the rotational force due to the weight of the water gate is held by the braking force acting on the brake drum 13 and does not act on the clutch device 39. Therefore, the operation of disengaging the clutch described above can be performed extremely easily and smoothly.

Next, when the operating lever 26 is pushed toward the machine box 1 side,
As described above, the braking force is released, and the water gate starts to descend downward due to its own weight, and the input shaft 14 is driven by the output shaft 15 to rotate in reverse at high speed. At this time, the brake shoe holder 32 connected to the left end of the input shaft 14 also rotates, and the brake shoe holder 32 is connected to the left end of the input shaft 14.
0,30 is a tension spring 33,3 due to the action of centrifugal force.
3, and the friction surfaces 30a, 30a of the brake shoes 30, 30 contact the brake drum 29 to apply the brake.

In this way, the centrifugal brake, which operates according to the descending speed of the water gate, allows the water gate to be smoothly lowered at a predetermined safe speed. If you want to temporarily stop the process midway through, you can simply release the push-in of the operating lever 26. Then, the brake drum 13
A braking force is applied to the water gate, which reduces its rate of descent and finally comes to a stop.

In addition, as another operation for lowering the water gate door, at the operation lever 26 position of the above-mentioned hoisting operation,
There is a way to reverse the handle 2. That is,
First, the operating lever 26 is rotated clockwise from the neutral position to engage with the operating lever stopper 27. The braking force acting on the brake drum 13 is released, and the water gate door is maintained in that position by the ratchet wheel 6 and pawl 7. Here, the handle 2 is reversed and the handle shaft 3 is rotated. The movable brake plate 4 rotates counterclockwise together with the handle shaft 3 and moves away from the fixed brake plate 9. As a result, the frictional force between the fixed brake plate 4 and the ratchet wheel 6 disappears, so the output shaft 15, input shaft 14, and drive shaft 10 are reversed by the rotational force due to the water gate's own weight, and the water gate descends. . Therefore, handle 2
If you continue to reverse the flow, the flood gate will continue to descend. When the rotation of the handle 2 is stopped, the movable brake plate 4 rotates to the right relative to the fixed brake plate 9, and is moved to the left by the male threaded portion 10a to connect the ratchet wheel 7 and the friction plates 5, 5. Fixed brake plate 9
sandwich it between. As a result, a frictional force is generated, and the fixed brake plate 9, ratchet wheel 6, and movable brake disc 4 are integrated, and the engagement of the ratchet wheel 6 and pawl 7 prevents reverse rotation and the water gate stops.

At the final stage of the water gate lowering process, it may be necessary to actively push down the water gate and hold it at the lowest position in order to maintain the watertightness of the lower part of the gate body. In this case, when the operating lever 26 is fixed to the operating lever stopper 27 (the brake of the reduction gear train 38 is released) and the handle 2 is reversed, the movable brake plate 4, which rotates together with the handle shaft 3, is engaged. The rotation of the handle 2 is transmitted to the gear rod 17 and the water gate is pushed down.

After completing each operation of raising and lowering the water gate, the operating lever 26 is pulled upward through the neutral position and stored separately.

In this state, the water gate door is held safely and reliably in that position by the action of the brake device 37 of the reduction gear train 38 and the engagement between the pawl and pawl, and the operating lever 26 is removed. There is no risk of accidents caused by mischief or other causes.

In this example, since the friction plates 5, 5 were arranged on both sides of the ratchet wheel 6, the frictional force between the fixed brake plate 9 and the ratchet wheel 7 was easily and reliably obtained.
It goes without saying that the friction plates 5, 5 can be omitted depending on the materials and properties of the contact surfaces between the fixed brake plate 9 and the ratchet wheel 7.

As explained above, according to the present invention, the push-in operation or rotation operation of the operating lever or the handle 2
By rotating the sluice gate, you can easily, reliably and quickly raise, lower, or stop the water gate. In addition, the control lever can be easily removed and stored, preventing accidents caused by mischief by persons other than the water gate operator. This has the effect of being able to prevent the occurrence of.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional plan view of an embodiment of the present invention (rest state), Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1, Fig. 3 is a cross-sectional side view of the brake device and the operating lever, and Fig. 4 1 is a sectional view taken along the line B-B in FIG. 1 of the centrifugal brake device, and FIG. 5 is a front view of the main parts showing the rest state and the neutral position of the operating lever. 3... Handle shaft, 3a... Engaging protrusion, 4...
Movable brake plate, 6... pawl wheel, 7... pawl, 9...
Fixed brake plate, 10... Drive shaft, 10a... Male screw part, 11... Clutch plate, 13... Brake drum, 14... Input shaft, 15... Output shaft, 17
... Gear rod, 19 ... Brake band, 36 ...
Centrifugal brake device, 37...Brake device, 38
...Reduction gear train, 39...Clutch device.

Claims (1)

[Scope of Claims] 1. A water gate opening/closing device that opens and closes a water gate by raising and lowering the water gate, comprising: (1) a handle coupled to one end, a mating protrusion at the other end, and a device for opening and closing the water gate; (2) a drive shaft having a fixed brake plate around the periphery, a male threaded portion provided on the outer peripheral surface between the brake plate and the handle shaft, and disposed coaxially with the handle shaft; (3) It has claw teeth on its outer periphery, which mesh with the claws fixed to the mechanism box, and are supported between the fixed brake plate and the male threaded part of the drive shaft, and are rotatable only in the water gate winding direction (normal rotation direction). (4) a ratchet wheel that is threadedly engaged with the male threaded portion of the drive shaft, meshes with the engaging protrusion of the handle shaft at the end surface on the handle shaft side, and rotates the pawl by relative rotation between the handle shaft and the drive shaft; a movable brake plate that clamps or releases the vehicle from the fixed brake plate; (5) a reduction gear train driven by the drive shaft and having a centrifugal brake device and a brake device; (6) the drive shaft and the reduction gear (7) a gear rod that meshes with the reduction gear train and moves up and down together with the water gate connected to its lower end. 2. The drive shaft and the input shaft of the reduction gear train are arranged coaxially, and the clutch device is attached to the input shaft so as to be slidable only in the axial direction, and has an engagement step on an end surface on the drive shaft side. a clutch plate that is always biased toward the input shaft; an engagement step that can engage with an engagement step of the clutch plate that is provided on an end surface of the input shaft on the drive shaft side; The water gate opening/closing device according to claim 1, comprising an operating lever that can be moved against the biasing force.