JPH0442488B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a door lifting/lowering opening/closing device for a gate such as a water gate.

``Prior Art'' Conventionally, there is a gate opening/closing device that raises and lowers the door by providing a screw in the door and rotating the screwed female screw forward and backward.Self-locking is achieved by stopping the female screw. Although it is possible to press it for sealing, it is not suitable for rapid closing because it cannot be lowered under its own weight in an emergency. There is also a gate opening/closing device that uses a wire rope or rack on the door body to raise and lower the gate body using a drive wheel, and although it is suitable for rapid closing due to the lowering of the gate's own weight, it is necessary to switch the stop position locking mechanism when slowly raising and lowering the gate using a forward/reverse drive handle. The operation is complicated, and the forward/reverse drive handle reverses rapidly when lifting under its own weight, resulting in a lack of safety.

``Problems to be Solved by the Invention'' The present invention is a safe and simple gate that is capable of rapid lowering by its own weight, sealed pressing, slow lifting and self-locking (self-holding) in a predetermined position, and can hold the input shaft in a restrained state during rapid lowering. The purpose is to obtain a switchgear.

"Means for Solving the Problems" The present invention provides a door in which an input shaft for raising and lowering the door body is provided in the machine case, and a screw rod for raising and lowering the door body and a female drive screw screwed thereto are provided in the machine case. In the body lifting device, the screw rod and the female screw are formed by a ball screw,
The forward/reverse drive shaft for the female screw and the forward/reverse sliding gear screwed into the spiral formed on the drive shaft are rotated in the forward/reverse direction via one-way clutches in opposite directions provided on both sides of the sliding gear. A gate opening/closing device is provided which is movably connected, the sliding gear is formed to be rotatable in forward and reverse directions by the input shaft, and an opening/closing clutch for lowering the weight of the gate body is interposed on the forward and reverse drive shaft. A gate opening/closing device according to the above specified invention, in which a female screw and a forward/reverse drive shaft are connected via a reduction gear, as a specified invention; A gate opening/closing device according to the invention, wherein the reduction device is a reduction gear; a bevel gear on the female screw; The gate opening/closing device according to the invention, wherein a reduction gear is formed by meshing the bevel gear with a small bevel gear provided at the tip of the forward/reverse drive shaft. The gate opening/closing device according to each of the above inventions, in which the opening/closing clutch is a multi-disc clutch, which are formed so as to be able to rotate in forward and reverse directions by meshing with each other; The gate opening/closing device according to each of the above inventions, in which the opening/closing clutch is a multi-plate clutch; The gate opening/closing device according to each of the above inventions is provided with a reversal braking device for a female screw for driving the gate opening/closing device. It is constituted by the gate opening/closing device described in each of the above inventions, which is a centrifugal brake.

"Function" Therefore, the manual handle 15 is attached to the input shaft 9 for raising and lowering the door body.
Alternatively, by installing a power rotation device and rotating the input shaft 9 in one direction with the opening/closing clutch 10 for lowering the door body 16 under its own weight closed, the sliding gear 6 slides in one direction. It presses against one one-way clutch 7 and separates from the other opposing one-way clutch 8. Then, the forward/reverse drive shaft 4 is rotated in one direction via the one clutch 7 by the frictional force caused by the pressure contact, and the female screw 2 is further decelerated and rotated in one direction via the deceleration device 11 to be screwed thereto. Screw rod for raising and lowering the door body 1
is slowly lowered, and the door body 16 is pressed against the gate floor surface, and this state is maintained by the non-returning action of the one-way clutch 7. Also, during slow descent, the input shaft 9
When the rotation of the door body 16 is stopped, the door body 16 is stopped and self-locked by the non-return action of the one-way clutch 7 at that position. Also, by rotating the input shaft 9 in the opposite direction, the sliding gear 6 slides to the other side, presses against the other one-way clutch 8, and separates from the opposite one-way clutch 7, thereby reducing friction due to the press-contact. The forward/reverse drive shaft 4 is rotated in the other direction by force via the other one-way clutch 8, and the female screw 2 is further decelerated and rotated in the other direction via the deceleration device 11, and the door is screwed thereto. When the body lifting screw 1 is slowly raised and the input shaft 9 is stopped, the door body 16 is self-locked in that position by the non-return action of the other one-way clutch 8. When the opening/closing clutch 10 is opened, the reduction gear 11 and the female screw 2 are freed, and the load of the door body 16 is applied from the screw 1 to the female screw 2, so the female screw 2 rotates via the ball. 1 and door body 16
is braked by the centrifugal brake 34, which is a reverse braking device, and rapidly descends under its own weight to close the gate. Since the speed reduction device 11 is formed by a small bevel gear 13 that meshes with the bevel gear 12, power is transmitted.

"Example" A box 19 is provided on the top surface 17 of a gate-shaped water gate via a stand 18, and the stand 18 and the box 19
A female screw 2 for driving is screwed into a screw rod 1 for lifting and lowering the door body that passes through the door in the vertical direction, and a rotary cylinder 20 provided at the upper end of the female screw 2 is supported in the machine case 19 via a bearing 21. A bevel gear 12 is provided at the upper end of this rotating cylinder 20.
and a small bevel gear 13 that meshes with the bevel gear 12.
is provided at the tip of the horizontal forward/reverse drive shaft 4, and these meshing bevel gears 12, 13 form a speed reduction device 11. The screw rod 1 and the female screw 2 are a ball screw 3 having a large number of balls interposed between the screws, and ball guides 22, 22 are provided on the outer surface of the female screw 2. In addition, a multi-plate opening/closing clutch 10 for lowering the door by its own weight is interposed in the middle of the forward/reverse drive shaft 4, and a manual lever 23 is connected to the central shaft 2.
4, and the clutch 10 can be opened and closed by a pawl 25. A spiral 5 is formed on the input side of the drive shaft 4, a forward and reverse sliding gear 6 is screwed onto the spiral 5, and one-way clutches 7 and 8 in opposite directions are provided on both sides of the sliding gear 6, The sliding gear 6 and the drive shaft 4 are connected via the clutches 7 and 8 so as to be rotatable in forward and reverse directions. Then, the input gear 14 is meshed with the sliding gear 6, the input shaft 9 of the input gear 14 is projected to the outside of the machine box 19, and the door body 16 is raised and lowered by rotating the input shaft 9 forward and backward. It is something that makes you It is preferable to attach a manual handle 15 to the input shaft 9, but a portable power rotation device can be detachably attached to the input shaft 9 to rotate it in forward and reverse directions. The above screw rod 1
At the bottom is a spindle connected to the door body 16 by a pin 26. The bevel gear 12 is the driven pinion 3
5 are in mesh with each other, and the driven shaft of the small gear 35 is used as the input shaft of the centrifugal brake 34 provided on the machine box 19. Furthermore, figure 2
7 is a sliding annular groove that engages with the pawl 25;
8 is a multi-plate clutch 1 by sliding in the annular groove 27.
0 is an operating fitting for opening and closing, 29 is a manual lever 23
automatic upright arm, 30 is a pressing spring of said arm 29, 31
3 is a screw rod cover, 32 is a retractable bellows of screw rod 1, and 3 is a screw rod cover.
3 is an opening gauge, and 34 is a centrifugal brake "effect." Since the present invention is configured as described above, the door body 16 is slowly raised and lowered by forward and reverse rotation of the input shaft 9, and is stopped at a required level. The door body 16 can be self-held (self-locked), and the door body 16 can be pressed against the floor surface by rotation of the input shaft 9. Further, the gate body 16 can be rapidly lowered by its own weight by simply opening the opening/closing clutch 10, and in this case, the input shaft 9 can be kept stationary, thereby providing a safe, easy-to-operate, and extremely simple gate opening/closing device.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing the gate opening/closing device of the present invention, and FIG. 2 is a front view of FIG. 1 viewed from the right. 1... Screw for raising and lowering the door body, 2... Female screw for driving,
3...Ball screw, 4...Forward/reverse drive shaft, 5...Spiral, 6...Forward/reverse sliding gear, 7, 8...One-way clutch, 9...Input shaft for lifting and lowering the door body, 10... Opening/closing clutch, 11... Reduction device, 12... Bevel gear, 1
3... Small bevel gear, 14... Input gear, 15... Manual handle, 34... Centrifugal brake, 35... Driven small bevel gear.

Claims (1)

[Scope of Claims] 1. A door elevating device in which an input shaft for elevating the door body is provided in the machine case, and a screw rod for elevating the door body and a female drive screw screwed thereto are provided in the machine case, as described above. A screw rod and a female screw are formed by a ball screw, and a forward and reverse drive shaft for the female screw and a forward and reverse sliding gear that screws into the spiral formed on the drive shaft are provided on both sides of the sliding gear. The sliding gear is connected to be rotatable in the forward and reverse directions via a one-way clutch in opposite directions, and the sliding gear is configured to be rotatable in the forward and reverse directions by the input shaft, and the sliding gear is connected to the forward and reverse drive shaft for lowering the door body's own weight. A gate opening/closing device consisting of an opening/closing clutch. 2. The gate opening/closing device according to claim 1, wherein the female screw and the forward/reverse drive shaft are connected via a reduction gear. 3. The gate opening/closing device according to claim 1 or 2, wherein a bevel gear is formed on the female screw, and a small bevel gear provided at the tip of a forward/reverse drive shaft is meshed with the bevel gear to form a speed reduction device. 4. Claim 1, wherein the input gear provided on the input shaft and the sliding gear are meshed with each other so as to be rotatable in forward and reverse directions.
3. The gate opening/closing device according to any one of 3 to 3. 5. Claim 1, wherein the opening/closing clutch is a multi-disc clutch.
4. The gate opening/closing device according to any one of 4 to 4. 6. The gate opening/closing device according to claim 1, wherein the input shaft is provided with a manual handle. 7. The gate opening/closing device according to each of claims 1 to 6, further comprising a reversal braking device for a female drive screw. 8. The gate opening/closing device according to each of claims 1 to 7, wherein the reversal braking device is a centrifugal brake operated by a bevel gear formed on the female screw and a small driven bevel gear meshing with the bevel gear.