JPS6367316A - Manual gate switch - Google Patents

Abstract

PURPOSE:To engage a load with a worm and a worm wheel, by arranging a lifting unit, a driving shaft for driving a driving unit rotationally, the worm wheel, an intermediate shaft with the firmly set worm, a follower plate, a handle shaft, and a driving plate. CONSTITUTION:Between a follower plate 27 and the pressure-fitting surface 19A of a casing 19 set is a roller 29 fittingly under pressure. After that, between an intermediate shaft 24 and the side of a handle shaft 31 arranged are a worm wheel 22 and a worm 23 having a screw angle theta making a frictional force greater. A load applied by the side of a brake gear 25 but by an engaging force due to the worm wheel 22 and the worm 23. As a result, a rotational force is applied to a handle so that it may be quickly rotated in the moving- down direction of the gate, and by the kinetic energy of the handle, the brake gear 25 is released, moving down, the gate 12 with tare weight for a while.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a manual gate opening/closing machine for a water gate or the like that opens and closes a gate by turning a handle, and in particular, it is capable of switching between a locked state and an unlocked state simply by turning a handle. Regarding manual gate opening/closing machines.

[Prior art] Conventionally, the same applicant has proposed a patent application for this type of application in Utility Model Application No.
Publication No. 1329 proposes a water gate opening/closing machine. This opening/closing machine has a lock R-shaft that locks between the drive shaft that drives the gate to open and close and the handle shaft that is provided with the handle, which rotates in the opposite direction due to the gate's own weight when the handle shaft rotates forward, and a lock that locks when the handle shaft rotates in the opposite direction. It is equipped with a brake-equipped lock release mechanism that can release the lock and obtain braking force, and a reverse rotation force transmission mechanism that transmits the reverse rotation force of the handle shaft to the drive shaft.

Next, a detailed explanation will be given based on FIGS. 13 and 14.

When the handle 1 is rotated in the forward direction, the forward rotational force is transmitted to the clutch rod 3 of the drive plate 2, the driven plate 4, and the drive shaft 5. 8 so that it can freely rotate. Furthermore, a notch 9 is formed in the driven plate 4, and the clutch lever 3 is inserted into this notch 9. A roller 10 is interposed between the upright wall 9A of the notch 9 and the clutch rod 3, and is capable of coming into contact with the pressure contact surface 7A, which is the inner circumference of the casing 7.

Therefore, the positive rotational force of the handle 1 is transmitted to the handle shaft 6, the drive plate 2, the engagement of the clutch lever 3 with the upright wall 9A, the driven plate 4, and the drive shaft 5, and is transmitted to the gate (not shown). can rise.

When locked, when the handle 1 is released, the roller 10 is moved by the weight of the gate to the pressure contact surface 7A between the drive plate 2 and the casing 7.
It can be crimped and locked in between.

That is, when locked, the roller 10 is pushed forward by the bullet 9B, the roller 10 is pressed against the driven plate 4 and the pressing surface 7A, and the casing 7, the roller 10. The drive shaft 5 is integrated and locked.

To unlock, turn handle 1 slightly in the opposite direction.
The clutch lever 3 moves the roller 10 toward the upright wall 9A, releases the close contact state, and releases the lock.

And to lower the gate further, add 1 more handles.
The gate is lowered by its own weight by applying a reverse rotational force to the gate and rotating the handle 1 in the reverse direction while preventing the roller 10 from coming into close contact with the driven plate 4 and the pressure contact surface 7A.

[Problems with the Prior Art] By the way, in the above-described opening/closing machine, the handle must be constantly turned when the gate is lowered, so the handle cannot be turned very quickly and the handle is very tiring.

The present invention applies rotational force to the handle so that it quickly turns in the downward direction, and uses the kinetic energy of the handle to release the brake, allowing the gate to descend under its own weight for a while.

[Means for Solving the Problems] The present invention is constructed by providing a worm on the intermediate shaft and a worm wheel on the drive shaft.

[Operation] The load applied to the drive shaft can be resisted not only by the brake device but also by the locking force between the worm and the worm wheel.

[Embodiment] FIGS. 1 to 9 show a first embodiment of the present invention, in which 11 is a bin rack that is an elevating body, and a gate 12 for opening and closing a waterway is attached to the lower end by a mounting shaft 13. It is pivoted. 14 is a handle that also serves as a flywheel for opening and closing the gate 12. 15 is bin rack 1
A pinion is a driving body that engages with the gate 1 to raise and lower the gate 12, and is supported by a shaft 16.

A gear 17 is provided on the other side of the shaft 16. A drive shaft 18 is supported in a casing 19 in parallel with the shaft 16, and a gear 21 that meshes with the gear 17 is fixedly installed on one side of the drive shaft 18, and a worm wheel 22 is mounted on the other side. be fixed. A worm 23 that meshes with the worm wheel 22 is fixed to an intermediate shaft 24. The thread angle θ of the worm wheel 22 and the worm 23 is set in a range exceeding the friction angle, that is, approximately 10 degrees or more, as will be described later.

The intermediate shaft 24 is connected to the handle 1 via a brake device 25.
Linked to the 4th side. 26 is a drive plate, and clutch protrusions 26A are provided at intervals on the edge thereof. The driven plate 27 provided with a gap inside the clutch protrusion 2GA has a tapered notch 28 formed at a predetermined interval on its edge, and a gap between the rising wall 28A of the notch 28 and the clutch protrusion 26A A steel roller 29 is disposed on the roller 29.
A spring 30 is interposed between the rising edge 228A and the rising edge 228A. Further, the driven plate 27 is fixed to the intermediate shaft 24. On the other hand, a handle shaft 3 has a handle 14 fixed to the end of the drive plate 2G.
Fixed to 1.

The notch 28 of the driven plate 27, the roller 29, and the crimping surface 19A of the casing 19 constitute the brake device 25 that utilizes crimping.

Next, the worm wheel 22 and the worm 23 will be explained.

As shown in Fig. 8, the force Pa applied to the effective diameter circumference necessary to raise the screw is P o = NV janθ = WP/πd2, and the efficiency of the screw is the work done during one rotation of the screw WP and the work done πd2P This is the ratio of

Here, if the efficiency is η, in the case of a square wire rod, η-WP/πd2P = πd2P/πd2P=Po /P = p (πd2-μP)/πd2 (P+μπd2) In the case of a triangular screw, ηΔ=Po/P = tanθ /lan (θ×ΦΔ)=P(πd2−
μP/cosα)/πd2(P+μπd2/CO3α).

Here μ=0.15. μΔ=0. The relationship between the screw angle θ and the efficiency η and ηΔ assuming i7 is expressed as a curve:
It will look like Figure 9.

Therefore, when finding the conditions for maximum efficiency, tanθ=1/C
O8Φ-tanΦ or tan (θ+Φ/2)=1 is obtained, and θ=45゛-Φ/2.

In FIG. 9, if the angle θ of the rectangular wire is approximately 8 degrees or more, the screw will not return by itself, and if the angle θ of the triangular screw is approximately 9 degrees or more, the screw will not return by itself.

In this way, the screw angle θ of the worm wheel 22 and the worm 23 is set so as to be superior to the RI friction force.

Next, the operation of the above structure will be explained.

When the gate 12 is raised, the handle shaft 24 rotates when the handle 14 is turned, and this rotation presses the roller 29 toward the rising wall 28A. The rotation of the intermediate shaft 24 causes the worm 23 to rotate, and in conjunction with this rotation, the worm wheel 22 rotates. And gear 21. The pinion 15 rotates via i7, the bin rack 11 is pulled up, and the gate 12 is opened.

Next, when fixing the gate 12 in place, use the handle 1.
4, the spring 30 presses the roller 29, and the roller 29 presses the driven plate 27 and the casing 19 on the contact surface 19A.
The gate 12 can resist the weight of the gate 12 by being clamped and crimped. At the same time, since the frictional force between the worm wheel 22 and the worm 23 is small, the gate 12 tends to descend with a slight force.

When changing the position of the gate 12, the handle 1
Rotate 4 in the opposite direction. This reverse rotation causes the clutch lever 26 to
A presses the roller 29 against the rising wall 28A side, and the roller 2
9 is removed from the fitted state between the driven plate 24 and the crimp surface 19A of the casing 19.

Further, when the handle 14 is reversed, the clutch lever 26
A presses the roller 29 against the rising wall 28A, and transmits rotational force from the driving plate 26 to the driven plate 27. When the rotational force in the opposite direction is transmitted to the driven plate 27 in this way, the intermediate shaft 2
4. Worm 23, worm wheel 22 and gear 2
1.17 and the pinion 15, and the gate 12 can be raised. Further, once the handle 14 is turned in the opposite direction to release the fitted state of the roller 29, the gate 12 can be lowered by its own weight by releasing the handle 14.

As described above, the crimping surface 1 of the driven plate 27 and the casing 19
The load applied by the gate 12 side can be reduced by providing the roller 29 between the intermediate shaft 24 and the handle shaft 31 side so as to be able to press the roller 29, and by providing the worm wheel 22 and the worm 23 having a thread angle θ that increases the frictional force between the intermediate shaft 24 and the handle shaft 31 side. Said brake device! ! This can be resisted not only by the fixing force by the worm wheel 25 but also by the locking force by the worm wheel 22 and the worm 23. As a result, when the gate 12 is fixed in a predetermined position, the pressing force of the roller 29 does not become excessive, and the pressing state of the roller 29 can be released even if the handle 14 is turned lightly, so that the gate 12 can be easily raised and lowered. Can be done.

That is, by providing the worm wheel 22 and the worm 23, the frictional force in the brake device 25 is reduced, and the brake release force can be reduced. The brake device 25 can be released for a long time by the rotational energy given to the diagonal handle 14, and as a result, the gate 12 etc. can be lowered for a while after operating the handle 14 due to its own weight, making the work of lowering the gate 12 easier. Can be done.

Next, another embodiment of the present invention will be described. Note that the same parts as in the first embodiment are given the same reference numerals, and detailed explanation thereof will be omitted.

FIG. 10 shows a second embodiment of the present invention, in which the first embodiment
As in the embodiment, a slidable brake shoe 41 is provided between the crimp surface 19A of the casing 19 and the driven plate 27, and the brake device 25A is constituted by the crimp surface 19A of the casing 19, the driven plate 27, and the brake shoe 41.
The brake shoe 41 is connected to the casing 19 and the driven plate 27.
By crimping and fixing between them, a locked state can be achieved, and when the brake shoe 41 is pushed down by the clutch lever 26A, the locked state can be released.

11 and 12 show a brake device according to a third embodiment of the present invention, in which when the handle 14 is released, the intermediate shaft 24 is reversed by the weight of the gate 12.
The crimping surface 19A of the casing 19 is connected to the crimping surface 19A of the casing 19 via the brake disk 53 that constitutes a part of the driven plate 52 screwed onto the intermediate shaft 24.
A threaded portion 54 is formed on the key 24A side of the intermediate shaft 24 so as to be moved to the side and pressed and locked, and the driven plate 52 is screwed into the threaded portion 54 so as to freely rotate. The press contact surface 19A of the casing 19 and the brake disk 53 constitute a brake device 55 that is pressed into contact with the press contact surface 19A of the casing 19. Reference numeral 56 denotes a drive plate fixed to the handle shaft 31, and a pin 57 is provided between the drive plate 56 and the driven plate 52 to regulate the rotation angle of both. 58 is a spring interposed between the driven plate 52 and the driving plate 56.

Therefore, unlocking can be selected depending on the pressure contact state between the brake disk 53 of the driven plate 52 and the pressure contact surface i9A of the casing 19.

Note that the present invention is not limited to the above embodiments,
Various modifications are possible.

[Effects of the Invention] The present invention provides an elevating body connected to a gate and raised and lowered by a drive body, a drive shaft that rotationally drives the drive body, a worm wheel fixed to this drive shaft, and a worm wheel that meshes with the worm wheel. An intermediate shaft to which a worm is fixed, a driven plate fixed to this intermediate shaft, a handle shaft to which a handle is fixed to one side, a drive plate fixed to the other side of this handle shaft, and the driven plate. Equipped with a brake device that allows you to select either connecting the driving plate or locking the driven plate by pressing it against the pressure contact surface by operating the handle, and the rotational force is applied so that the handle quickly turns in the direction of lowering the gate. , the gate can be lowered for a while under its own weight while releasing the brake system using the kinetic energy of the handle.

[Brief explanation of the drawing]

1 to 9 show a first embodiment of the present invention, FIG. 1 is a concave view showing the state of use, FIG. 2 is a front view of the main parts, and FIG. 3 is a 4 is a sectional view taken along line IV--IV of FIG. 3, FIG. 5 is a sectional view taken along line v-v of FIG. 3, FIG. 6 is a sectional view of the brake device, and FIG. Fig. 6 is a sectional view taken along line vi-V:I, Fig. 8 (A) is a front view of the screw, Fig. 8 (B) is an explanatory diagram showing the inclination of the thread angle, and Fig. 9 is a diagram showing the thread angle and efficiency. The graph shown in FIG. 10 is the second graph of the present invention.
11 is a sectional view showing a third embodiment of the present invention; FIG. 12 is a sectional view taken along the xn-xm line in FIG. 11; FIG. 13 is a sectional view showing a conventional example; FIG. 14 is a sectional view taken along the line XrV-XIVia in FIG. 13.

Claims (1)

[Scope of Claims] An elevating body connected to a gate and raised and lowered by a drive body, a drive shaft that rotationally drives the drive body, a worm wheel fixed to this drive shaft, and a worm that meshes with the worm wheel fixed. a fixed intermediate shaft, a driven plate fixed to this intermediate shaft, a handle shaft with a handle fixed to one side, a drive plate fixed to the other side of this handle shaft, and the driven plate and drive plate. A manual gate opening/closing machine characterized in that it is equipped with a brake device that allows selection of either coupling or locking by pressing the driven plate against the pressure contact surface by operating the handle.