JPH0426512Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a device for raising and lowering a water gate in order to open and close a water gate.More specifically, it is a device that raises and lowers a water gate by manual hoisting operation. This invention relates to an improvement in a water gate lifting device that allows the water gate to be lowered rapidly by its own weight in an emergency.

<Prior Art> This type of water gate lifting device has already been proposed in the past. For example, the system shown in Japanese Patent Publication No. 58-56767 is a system in which the rotation of a drive shaft connected to a handle is transmitted to a pinion via a gear mechanism, and the rotation of this pinion raises and lowers a rack attached to a water gate. It is. In addition, with this conventional device, the water gate can be raised by rotating the handle.
When the gate is closed in an emergency, the connection with the handle is severed and the water gate is forced to descend under its own weight.

<Problems to be solved by the invention> However, in the conventional device, the engagement/disengagement mechanism between the drive shaft directly connected to the water gate and the handle is complicated, and the operation when switching engagement/disengagement is troublesome, and manual biasing is not required. However, it has the disadvantage that it cannot be operated quickly and reliably in emergencies.

The present invention aims to solve these drawbacks and provide a water gate lifting device in which the handle can be easily engaged and disengaged, the switching operation can be carried out reliably, and even in an emergency, there is no need to get confused about the operation procedure. It is something.

<Means for Solving the Problems> The technical means of the water gate door lifting device of the present invention includes a handle that is rotated manually, and a handle that is fixed to the handle and rotatably supported on the machine frame. A cylindrical shaft, a driving main shaft that fits into the inner surface of the handle cylindrical shaft and is rotatable relative to the handle cylindrical shaft, a clutch pusher cylinder that is spline-connected to the handle cylindrical shaft, and a clutch pusher that is fixed to the driving main shaft. It consists of a brake drum, a ratchet wheel interposed between the clutch pusher and the brake drum, and an engagement/disengagement switching device for coupling the handle to the drive shaft. At the same time, a female thread is formed on the inner surface of the clutch pusher cylinder,
Both screws can be engaged and disengaged freely, and a spiral having the same lead as the screw is formed on the outer surface of the clutch pusher cylinder, and is engaged with and detachable from the spiral by elastic pressing force. The guide device is fixedly installed on the machine frame.

<Function> In the floodgate door lifting device of the present invention, when the handle is rotated in the direction of opening the door, the handle cylindrical shaft rotates, and the handle cylindrical shaft is spline-coupled and spirally supported by the guide device. The clutch pusher moves in the axial direction while rotating, and the screws of both the clutch pusher and the drive shaft are screwed together.
At this time, if both screws fail to be screwed together, they will be screwed together next time by further rotating the handle. Since the spiral support of the clutch pusher by the guide device is supported by elastic pressing force, even if the screw fails to engage, the guide device automatically escapes and the engagement relationship is not affected. After screwing the screws,
As the handle continues to rotate further, the clutch pusher moves further and presses against the brake drum via the ratchet wheel. As a result, the rotation of the handle is transmitted to the brake drum, the main drive shaft integrated with the brake drum rotates, and the water gate rises.

When closing the door in an emergency, first, the engagement/disengagement switching device disconnects the handle from the drive shaft and rotates the handle in the door closing direction. At this time, the brake is applied to the drive shaft and it does not rotate. As the handle cylinder shaft rotates, the clutch pusher cylinder moves backward, separates from the ratchet wheel, and is further unscrewed from the drive shaft. Then, when you release the brake,
The drive shaft becomes free and the water gate lowers due to its own weight. At this time, the drive shaft rotates as a result, but the handle does not rotate. When the water gate door stops descending during the descent of its own weight, the handle and the drive shaft are connected by the engagement/disengagement switching device. As a result, the rotation of the handle is directly transmitted to the main drive shaft, so by rotating the handle in the door closing direction, the main drive shaft rotates and the water gate is forcibly lowered.

<Example> The elevating device of the present invention will be described with reference to an example shown in the drawings. A drive gear 2 is attached to the drive main shaft 1, and rotational force is transmitted from the drive gear 2 to a pinion gear (not shown) by gear transmission, and as the pinion gear rotates, the water gate is opened. A rack (not shown) is raised and lowered to open and close the water gate. Since the structure in this respect is conventionally known, the explanation thereof will be omitted. As a result of this structure, the rotation of the main drive shaft 1 and the lifting and lowering of the water gate door are completely linked.
Reference numeral 3 denotes a handle cylindrical shaft, which is rotatably fitted onto the drive main shaft 1. A handle 4 is fixed to the handle cylinder shaft 3, and when the handle 4 is rotated, the cylinder shaft 3
rotate as a unit. This handle cylinder shaft 3 is rotatably supported in a fixed position by a bearing portion 5 of the machine frame. Reference numeral 6 denotes a clutch pusher cylinder, and an outer circumferential spline 7 formed at the end thereof engages with an inner circumferential spline 8 formed at the end of the handle cylinder shaft 3. A female thread 9 formed on the inner surface of the clutch pusher cylinder 6 can be screwed into a male thread 10 formed on the drive main shaft 1. Further, a spiral groove 11 is provided on the outer surface of the clutch pusher 6.
is formed. The leads of this spiral groove 11 are set to be the same as those of the screws 9 and 10. A guide ball 12 engages with this spiral groove 11.
The guide ball 12 is attached to the bearing portion 5 in a fixed position with a back pressing force applied by a push spring 13. Reference numeral 14 denotes a ratchet wheel, which is attached to the drive main shaft 1 so as to be rotatable and movable in the axial direction. Also, ratchet wheel 1
Friction bodies 15 are attached to both sides of 4.
This ratchet wheel 14 is engaged with a ratchet pawl (not shown) and can rotate only in one direction (the direction in which the water gate is raised). A brake drum 16 is fixed to the main drive shaft 1, and rotation of the main drive shaft 1 can be suppressed by applying a friction restraining force to the outer periphery of the brake drum 16 using a manual operating device (not shown). ing. An automatic braking device 17 using a centrifugal force system is provided at the end of the main drive shaft 1, and braking is automatically applied when the main drive shaft 1 rotates at a speed above a certain level. 18 is a handle engagement/disengagement switching device, the details of which are shown in FIGS. 4 and 5. 19
is a ratchet wheel fixed to the end of the drive shaft 1. A ratchet pawl 20 that engages with the ratchet wheel 19 is rotatably attached to the boss portion of the handle 4 by a pin shaft 21. The ratchet pawl 20 is always operated by the spring 22.
The ratchet is biased in the occlusal direction. A protruding pin 23 is attached to the ratchet pawl 20, and a switching lever 24 engages with this protruding pin 23. That is, when the switching lever 24 is rotated by the switching knob 25, the lever 24 moves to the protruding pin 23.
Press to move the ratchet pawl 20 in the removal direction. Note that the ratchet wheel 19 and the ratchet pawl 20 do not mesh when the handle 4 is rotated in the water gate upward direction, but on the contrary, they mesh when the handle 4 is rotated in the water gate downward direction. Furthermore, when the water gate is lowered by its own weight, even if the ratchet is in the engaged state, the direction of rotation is reversed, so it simply spins idly. Furthermore, when lowering the water gate, since the ratchet mechanism is not required as described above, it is possible to disengage the ratchet claw 20 by operating the switching knob 25 in advance.
In this case, it is possible to prevent the sound generation at the ratchet portion that occurs when the vehicle descends.

Next, the operation of the lifting device will be explained. When the water gate door is lowered and the water gate is closed, the clutch pusher 6 is disengaged as shown in FIG. 3. Therefore, when raising the water gate door in order to open the water gate from this state, the handle 4 is first rotated in the direction of arrow A (door opening direction). At this time, Ratchet 19,
20 do not mesh with each other, the rotation of the handle 4 is not transmitted to the drive main shaft 1, and only the drive cylinder shaft 3 fixed to the boss of the handle 4 rotates. Drive cylinder shaft 3
When this rotates, the clutch pusher 6, which is connected to the splines 7 and 8, also rotates in conjunction with the clutch pusher 6. A guide ball 12 is provided in the spiral groove 11 on the outer periphery of the clutch pusher 6.
are engaged, the clutch pusher 6, which is in the state shown in FIG. 3, begins to move in the direction of arrow B as it rotates. When the screws 9 and 10 are moved a little in direction B, they screw into each other. However, this screwing does not always occur accurately, and sometimes it may fail to be screwed together, but in this case, by continuing to rotate the handle 4, it will be possible to screw it together at the next opportunity. Become.
Moreover, at this time, since the guide ball 12 is supported by the pressing force of the spring 13, it climbs over the peak of the spiral groove 11 and moves to the adjacent groove to escape. Therefore, there is no problem caused by failure to screw together. Further, since a biasing force directed in the direction B is constantly applied to the clutch pusher cylinder 6 by the guide ball 12, the screws 9 and 10 are always screwed together at an appropriate screwing opportunity. When the screws 9 and 10 are screwed together in this manner, the clutch pusher cylinder 6 is rotated in a double screwed state, and continues to move in the direction B along with this rotation. Note that since the screw 9 and the spiral groove 11 have the same lead, there is no problem due to double screw engagement.
During the above rotation of the handle 4, the main drive shaft 1 is in a fixed state, so the water gate door does not move either. When the handle 4 continues to rotate further, the clutch pusher 6 moves to B.
Move further in the direction, and finally the ratchet wheel 1
4 to the brake drum 16. As a result, the rotation of the clutch pusher 6 is transmitted to the brake drum 16 via the ratchet wheel 14 and the friction bodies 15, 15.
The main drive shaft 1, which is integrated with the main shaft 1, begins to rotate. When the main drive shaft 1 starts rotating, the clutch pusher 6 inevitably stops moving in the B direction. Also,
The rotation of the drive main shaft 1 is transmitted to the water gate via the drive gear 2, the water gate is moved upward, and the water gate is opened.
Furthermore, even if the handle 4 is released during the raising operation of the water gate, the ratchet wheel 14 prevents the water gate from rotating in the opposite direction, so the water gate simply stops at that position and is free from its own weight. It does not twist and descend. In this manner, when the door opening operation is completed, the brake drum 14 is manually restrained and fixed.

Next, when lowering the floodgates in an emergency,
The brake drum 14 remains restrained, and
The switching knob 25 is rotated, the switching lever 24 pushes the protruding pin 23, the ratchet pawl 20 is moved in the release direction, and in this state the handle 4 is rotated in the closing direction (anti-A direction). Handle 4 and drive shaft 1
Since the main drive shaft 1 is fixed by the brake, the clutch pusher 6 begins to move in the opposite direction B as the handle 4 rotates in the closing direction, and the latchet wheel 14 and The connection relationship between the screws 9 and 10 is broken, and the screws 9 and 10 are disengaged by further movement in the direction opposite to B. After that, the clutch pusher cylinder 6 is moved due to the engagement relationship between the spiral groove 11 and the guide ball 12. It moves further in the direction opposite to B, and continues to move until the end of the clutch pusher cylinder 6 collides with the handle cylinder shaft 3. Next, when the brake drum 16 is released, the sluice gate begins to descend under its own weight. As the water gate door descends, the drive main shaft 1 is driven to rotate. At this time, the descending speed of the water gate door is suppressed by the centrifugal force type automatic braking device 17. Furthermore, during this descent, the relationship between the drive main shaft 1 and the handle 4 is completely cut off, so the handle 4 does not undergo any driven rotation.

If the sluice gate stops descending due to obstacles such as obstructions, water pressure loads, etc. during the descent of its own weight, the sluice gate is forcibly lowered by manual operation. For this operation,
First, rotate the switching knob 25 and switch the switching lever 2.
4 is released from the protruding pin 23. As a result, the ratchet pawl 20 becomes free,
It rotates in the occlusal direction by the action of the spring 22 and engages with the ratchet wheel 19. When the handle 4 is rotated in the closing direction (anti-A direction), this rotation is transmitted to the drive shaft 1 by the action of the ratchets 19 and 20, and the water gate is lowered.

In addition, in the lifting device of the present invention, the guide ball 1
The structure of 2 and its supporting means is not limited to that of the above embodiments, but any structure that allows the screwing position to move when a load of a predetermined value or more is applied may be used.
Any format can be adopted. Further, the structure of the handle engagement/disengagement switching device 18 may be freely used as long as it allows the ratchet to be easily engaged/disengaged.

<Effects of the invention> With the lifting device of the invention, the water gate can be raised and opened by rotating the handle. In the case of emergency closing, the water gate can be lowered rapidly by its own weight, and at this time, the handle is not driven to rotate, so there is no danger associated with rapid rotation of the handle as in conventional devices. Furthermore, if the sluice gate stops for some reason during the descent of its own weight, the sluice gate can be forcibly lowered by rotating the handle. In addition, with this invention, the water gate can be opened and closed with a simple switching operation and a rotation of the handle, and there is no need for any other manual biasing operations, making it possible to raise and lower the water gate safely, quickly, and and,
It can be done reliably.

[Brief explanation of the drawing]

The drawings show an embodiment of the water gate lifting device of the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is an enlarged sectional view of the clutch engaged state, Fig. 3 is an enlarged sectional view of the clutch disengaged state, and Fig. 4 5 is a cross-sectional view of the handle engagement/disengagement switching device, and FIG. 5 is a longitudinal cross-sectional view thereof. 1... Drive main shaft, 2... Drive gear, 3... Handle barrel shaft, 4... Handle, 5... Bearing portion of machine frame, 6... Clutch pusher, 7, 8... Spline, 9, 10 ...Screw, 11...Spiral groove,
12...Guide ball, 13...Press spring, 14...Ratchet wheel, 15...Friction body, 16...Brake drum, 17...Automatic brake device, 18
...Handle locking/unlocking device.

Claims (1)

[Claims for Utility Model Registration] 1. A handle that can be manually rotated, a handle cylinder shaft that is fixed to the handle and rotatably supported with respect to the machine frame, and that fits into the inner surface of the handle cylinder shaft, In addition, a drive main shaft rotatably provided with respect to the handle barrel shaft, a clutch pusher barrel spline-coupled to the handle barrel shaft, a brake drum fixed to the drive main shaft, and a clutch pusher barrel and brake drum. It consists of a ratchet wheel interposed in between and a switching device for connecting and disengaging the handle and drive shaft.A male thread is formed on a part of the outer surface of the drive shaft, while a female thread is formed on the inner surface of the clutch pusher. formed, and both screws are threaded together.
Further, a spiral having the same lead as the screw is formed on the outer surface of the clutch pusher cylinder, and a guide device is fixed to the machine frame and removably engages with this spiral by elastic pressing force. The water gate lift device is installed at the same time. 2 As an engagement/disengagement switching device, a ratchet wheel 19 is fixed to the drive main shaft 1, and a ratchet pawl 20 that engages with the ratchet wheel 19 when rotating in the door closing direction is attached to the boss portion of the handle 4 and is always engaged. The water gate door lifting device according to claim 1, wherein the ratchet pawl 20, which is biased in the direction, can be locked and held in a disengaged state by a locking device.