JP7365089B1 - Towing device and heavy goods transport vehicle equipped with the towing device - Google Patents

Abstract

The present invention provides a traction device that can lift heavy objects and has a simple structure, and a heavy object transport vehicle that can lift and move heavy objects. A traction device (1) has an extendable bellows (2), and the bellows has an upper cover (3) and a lower cover (4). The top cover has an air inlet 6 and an air outlet 7. A pipe 8 having an intake valve 9 or an exhaust valve 10 in the middle is connected to the intake port 6 and the exhaust port 7, respectively. When the two valves 9 and 10 are both closed, the space surrounded by the bellows, the upper cover, and the lower cover is airtight. A vacuum pump 11 is connected to the other end of the pipe 8 connected to the exhaust port 7. Further, a hook 5 is provided approximately at the center of the lower surface of the lower lid. A heavy goods transport vehicle has a traction device support, three or more wheels, and legs connecting the traction device support and the wheels, and the traction device is fixed to the traction device support. [Selection diagram] Figure 1

Description

The present invention relates to a traction device for hoisting heavy objects and a vehicle for transporting heavy objects equipped with the traction device.

Various devices have been proposed for lifting heavy objects using pressure. The air bellows-based jack-up device described in Patent Document 1 is a device for lifting a car when repairing a flat tire, and involves placing an airtight bellows under a car chassis member and injecting air into the bellows. The force of the bellows being extended is used to lift the car. The expansion/contraction mechanism described in Patent Document 2 is such that air is injected into and discharged from a bellows closed by an upper surface plate and a lower surface plate, thereby extending the bellows and moving an upper surface plate-shaped object up and down. In addition, the air lifter described in Patent Document 3 has an air spring made of a bellows body installed between a fixed base and an elevating table, and air is injected into and discharged from the air spring to expand and contract the air spring, allowing the elevating table to It raises, lowers, and lowers the

There are several devices other than those mentioned above that have been proposed that use bellows to lift heavy objects using pressure, but in all of them, the device is placed below the heavy object and the bellows are expanded by injecting air into the bellows. It is a device that lifts heavy objects placed on a device, and there is no device that lifts heavy objects. When a heavy machine is installed in a factory, it is necessary to lift and move the heavy machine, and the devices described in Patent Documents 1 to 3 cannot be used for such applications.

A hoist is a device for hoisting a heavy object, and a gate type crane (Non-patent Documents 1 and 2) is an example of a device for hoisting a heavy object in a relatively narrow space such as inside a building. These are devices in which a sling is installed approximately in the center of a sling supporting part (girder) that is supported by legs with a certain height at both ends, and the sling used to suspend heavy objects is placed on a pulley. lifted by. There is also a gate-type hydraulic lifter (Non-Patent Document 1) that uses hydraulic pressure as lifting force. This crane has almost the same shape as the above-mentioned portal crane, but by injecting oil into the extensible legs and extending the legs, it lifts a heavy object suspended from a lifting device.

Gate type cranes use pulleys to lift heavy objects, but there is a limit to the weight they can lift. Portal hydraulic lifters require a hydraulic unit and hydraulic cables.

Utility Model Hei05-019287 Utility model registration No. 3169261 Utility Model Hei07-009893

"Portable gate crane" that can lift heavy objects without crane equipment https://jirei.r-rental.co.jp/turu_ageru/ Mobile gate type crane https://www.rent.co.jp/sanki/l-06/0606/ido_mon/

The problem to be solved by the present invention is to provide a traction device that can lift heavy objects and has a simple structure, and a heavy object transportation vehicle that can lift and move heavy objects.

As a result of extensive studies, the inventor of the present application closed both ends of a telescopic bellows with a lid, opened an exhaust port and an intake port in the lid, and connected a pipe having a valve to each of the exhaust port and the intake port. After injecting air into the bellows to extend the bellows, close the valve of the pipe connected to the intake port, connect the other end of the pipe connected to the exhaust port to a vacuum pump, and then When the valve is opened and the vacuum pump is operated to reduce the pressure inside the bellows, the bellows contracts, resulting in a huge traction force, which led to the present invention.

One example of a method for utilizing the above-mentioned traction force is a device for lifting heavy objects. The upper cover (top cover) is fixed to a beam of the building so that the direction of expansion and contraction of the bellows is vertical. Install a hook on the lower lid for hanging heavy items. Hook a heavy object placed on the floor onto the hook, close the valve of the pipe connected to the intake port, connect the other end of the pipe connected to the exhaust port to the vacuum pump, open the valve of this pipe, and turn on the vacuum pump. When activated and the pressure inside the bellows is reduced, the bellows contracts and lifts the heavy object upward.

Once the heavy object is lifted, close the valve on the pipe connected to the vacuum pump. After that, even if the vacuum pump is stopped, the reduced pressure inside the bellows is maintained, so the heavy object remains suspended. Therefore, once a heavy object is lifted, it remains lifted without consuming energy.

A vacuum gauge may be added to measure the degree of vacuum inside the bellows. If the degree of vacuum decreases, operate the vacuum pump and open the valve on the pipe connected to the vacuum pump to increase the degree of vacuum.

Furthermore, a control device may be added. The control device is communicably connected to the vacuum gauge, the vacuum pump, and the two valves, and controls the two valves according to the degree of vacuum inside the bellows measured by the vacuum gauge. It has the function of opening and closing to operate or stop the vacuum pump. The control device operates the vacuum pump when the degree of vacuum inside the bellows falls below a predetermined threshold, opens the valve on the vacuum pump side, and opens the valve on the vacuum pump side when the degree of vacuum rises above the threshold by a certain degree. The vacuum pump can be stopped by closing the valve. As a result, the state in which the heavy object is lifted is more reliably maintained and safety is improved. The threshold value can be arbitrarily determined.

As a further development of the above method of utilizing traction force, there is a vehicle for lifting and transporting heavy objects. A traction device support section and both ends of the traction device support section to which a device (hereinafter referred to as traction device) consisting of the above-mentioned bellows, upper cover, lower cover, intake port, exhaust port, pipe with valve, vacuum pump, and hook is fixed. This vehicle has legs that support the vehicle, and wheels on the legs. This vehicle can be moved with heavy objects suspended from hooks, so heavy objects placed on the floor can be lifted up and moved.

The traction device according to the first invention has a bellows, the bellows has an upper cover at the upper end and a lower cover at the lower end, the bellows has an intake port and an exhaust port on the upper cover or the lower cover, and A pipe having a valve in the middle is connected to each of the intake port and the exhaust port, and when the two valves are closed, the space surrounded by the bellows, the upper cover, and the lower cover is airtight. A vacuum pump is connected to the other end of the pipe connected to the exhaust port, and the lower cover has a hook at approximately the center of the lower surface.

A traction device according to a second invention is the traction device according to the first invention, and includes a vacuum gauge and a control device that can measure the degree of vacuum inside the bellows, and the control device includes the vacuum gauge and the vacuum pump described above. and the above two valves so as to be communicable, and the control device opens and closes the two valves according to the degree of vacuum inside the bellows measured by the vacuum gauge, and operates or stops the vacuum pump. It is characterized by having the function of

A heavy goods transport vehicle according to a third aspect of the invention has a traction device support section, three or more wheels, and a leg section connecting the traction device support section and the wheels, and a first The traction device according to the invention or the second invention is characterized in that it is fixed.

The present invention provides a traction device that can lift heavy objects and has a simple structure, and a heavy object transportation vehicle that can lift and move heavy objects.

FIG. 1 is a schematic diagram of a traction device according to the present invention. FIG. 2 is a schematic diagram before and after a heavy object is lifted by the traction device according to the present invention. FIG. 1 is a schematic diagram of a heavy goods transport vehicle according to the present invention.

Next, embodiments of the present invention will be described, but it goes without saying that various changes and modifications can be made without departing from the technical scope of the present invention.

FIG. 1 shows a schematic diagram of one embodiment of a traction device according to the present invention. The traction device 1 has a telescopic bellows 2, which has an upper lid 3 and a lower lid 4. The top cover has an intake port 6 and an exhaust port 7. A pipe 8 having an intake valve 9 or an exhaust valve 10 in the middle is connected to the intake port 6 and the exhaust port 7, respectively. When the two valves 9 and 10 are both closed, the space surrounded by the bellows, the upper cover, and the lower cover is airtight. A vacuum pump 11 is connected to the other end of the pipe 8 connected to the exhaust port 7. Further, a hook 5 is provided approximately at the center of the lower surface of the lower lid.

In order to generate traction force in this traction device, first, the intake valve 9 is opened and the bellows is extended to a desired length. Thereafter, the intake valve 9 is closed, the exhaust valve 10 is opened, and the vacuum pump 11 is operated. When the pressure inside the bellows is reduced and the bellows 2 contracts, a traction force is generated.

FIG. 2 shows an embodiment in which the traction device according to the present invention is used to lift a heavy object. The diagram on the left side of FIG. 2 shows the situation before lifting a heavy object. The traction device 1 is fixed to a structure 16 such as a beam of a building. A heavy object 15 to be lifted is placed on the floor. The intake valve 9 is opened, the bellows 2 is extended, and the hook 5 is hooked to a heavy object 15. When lifting a heavy object, the intake valve 9 is closed, the exhaust valve 10 is opened, and the vacuum pump 11 is operated. The pressure inside the bellows is reduced, the bellows contracts, and the heavy object 15 hooked to the hook is lifted. The diagram on the right side of FIG. 2 shows the situation when a heavy object is lifted. The bellows 2 is contracted and the heavy object 15 is lifted.

Table 1 shows how much traction force is generated by this traction device. Assuming that the atmospheric pressure is 1 atm (1.033 kgf/cm2), the cases where the radius of the bottom surface of the cylindrical bellows is 25 cm and 50 cm are shown. When the radius of the bottom surface of the bellows is 25 cm, the generated traction force is 994 kgf when the pressure inside the bellows is reduced to 0.5 atm, 1824 kgf when the pressure is reduced to 0.1 atm, and 2008 kgf when the pressure is reduced to 0.01 atm. When the radius of the bottom surface of the bellows is 50 cm, the generated traction force is 3976 kgf when the pressure inside the bellows is reduced to 0.5 atm, 7298 kgf when the pressure is reduced to 0.1 atm, and 8030 kgf when the pressure is reduced to 0.01 atm.

FIG. 3 shows a vehicle for transporting heavy objects using the traction device according to the present invention. The heavy goods transport vehicle 17 has a traction device support section 18, three or more wheels 20, and a leg section 19 that connects the wheels 20 and the traction device support section 18, and the traction device 1 is installed on the traction device support section 18. has been done. The traction device has a vacuum gauge 12 installed on the lower cover 4. The vacuum gauge 12 can measure the atmospheric pressure inside the bellows 2. The traction device also has a control device 13, which is communicably connected to a vacuum gauge 12, a vacuum pump 11, an intake valve 9, and an exhaust valve 10 by wiring 14.

The control device 13 has a function of opening and closing the intake valve 9 and the exhaust valve 10 and operating or stopping the vacuum pump 11 according to the degree of vacuum (atmospheric pressure) inside the bellows 2 measured by the vacuum gauge 12. When the degree of vacuum inside the bellows 2 falls below a predetermined threshold, the control device 13 operates the vacuum pump 11, opens the exhaust valve 10, and increases the degree of vacuum. When the degree of vacuum rises to a certain degree or more above the threshold value, the exhaust valve 10 can be closed and the vacuum pump 11 can be stopped. As a result, the state in which the heavy object is lifted is more reliably maintained and safety is improved. The threshold value can be arbitrarily determined.

A guide mechanism 21 is provided near the bellows 2 to prevent the bellows 2 from swinging back and forth and left and right. As the guide mechanism, three or four rod-shaped structures may be arranged around the bellows, or a cylindrical structure may be provided to surround the bellows. A heavy object 15 is hooked to the hook 5 and suspended. In this state, by towing this heavy goods transport vehicle with a towing vehicle or the like, it becomes possible to transport heavy goods over long distances.

The towing device and the vehicle for transporting heavy objects according to the present invention can be used to lift and move heavy objects in narrow spaces such as inside buildings. Furthermore, the vehicle for transporting heavy objects according to the present invention can also be used to transport heavy objects over long distances.

1 Traction device 2 Bellows 3 Upper cover 4 Lower cover 5 Hook 6 Intake port 7 Exhaust port 8 Pipe 9 Intake valve 10 Exhaust valve 11 Vacuum pump 12 Vacuum gauge 13 Controller 14 Wiring 15 Heavy object 16 Structure 17 Heavy object transportation vehicle 18 Traction device support section 19 Leg section 20 Wheel 21 Guide mechanism

Claims (2)

a traction device, the traction device having a bellows;
The bellows has an upper lid at the upper end and a lower lid at the lower end,
The bellows has an intake port and an exhaust port on the upper cover or the lower cover, and a pipe having a valve in the middle is connected to each of the intake port and the exhaust port,
When the two valves are closed, the space surrounded by the bellows, the upper cover, and the lower cover is airtight;
A vacuum pump is connected to the other end of the pipe connected to the exhaust port,
The lower lid has a hook approximately in the center of the lower surface ,
It has a vacuum gauge and a control device that can measure the degree of vacuum inside the bellows,
the controller is communicatively connected to the vacuum gauge, the vacuum pump, and the two valves;
The control device has a function of opening and closing the two valves and operating or stopping the vacuum pump according to the degree of vacuum inside the bellows measured by the vacuum gauge.
A traction device characterized by: A vehicle for transporting heavy goods, comprising a traction device support part, three or more wheels, and a leg part that connects the traction device support part and the wheels,
A vehicle for transporting heavy goods, characterized in that the traction device according to claim 1 is fixed to the traction device support portion.