JP6829143B2 - Climbing crane - Google Patents

Description

The present invention relates to a climbing crane.

In recent years, especially in urban areas, buildings such as buildings are often constructed or demolished in narrow areas with adjacent objects.

At the time of construction / demolition of the building, a climbing crane is used to carry in / out building materials.

For example, Patent Document 1 shows a general technical level related to a climbing crane.

Japanese Unexamined Patent Publication No. 2010-18416

However, since the jib of the climbing crane is very long and the area occupied during work is large, it is necessary to raise the jib when turning the jib to avoid contact with an adjacent object, resulting in poor workability.

Further, when the jib is raised, the position of the center of gravity becomes high, and especially in a strong wind, the jib may be agitated and the stability may be lowered.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a climbing crane that can be made compact as a whole and can improve workability and stability in a narrow space.

In order to achieve the above object, the climbing crane of the present invention includes a mast that is erected so as to extend in the vertical direction.
An elevating unit that can be elevated and lowered with respect to the mast,
A swivel body provided on the elevating unit so as to be swivel
A base arm that is freely extended and retracted to the swivel body,
A telescopic arm that is stretchably arranged on the base arm,
A dolly that is freely arranged on the telescopic arm and
A hanging load hook that can be freely hoisted and unwound from the trolley ,
It is equipped with a parallelogram link mechanism that allows the base arm to extend and retract with respect to the swivel body.
In the parallelogram link mechanism, the base end of the swing link is rotatably arranged on the upper surface of the swing body around a pin, and the base end of the base arm extending horizontally to the tip of the swing link. It is composed by connecting the parts with pins,
A swing sprocket is fitted to the pin at the base end of the swing link, a swing chain is hung endlessly between the swing sprockets, and a swing drive sprocket is engaged with the swing chain. The rocking drive sprocket is rotationally driven by the rocking drive device.
The swing drive device can be an orthogonal axis speed reducer type motor .

In the climbing crane, the elevating unit is
An elevating mast that covers the outer circumference of the mast and is slidably arranged in the vertical direction with respect to the mast.
An elevating drive sprocket disposed on the elevating mast so as to engage the chain plate attached to the mast.
A braking sprocket disposed on the elevating mast to engage with the chain plate can be provided.

Further, in the climbing crane, the mast is formed of a hollow tubular member.
It is possible to provide a stopper pin that projects outward to prevent the elevating mast from falling.

According to the climbing crane of the present invention, it is possible to achieve an excellent effect that the overall compactness can be achieved and the workability and stability in a narrow space can be improved.

It is a side view which shows the Example of the climbing crane of this invention. It is a side sectional view which shows the elevating unit in the Example of the climbing crane of this invention. It is a plan sectional view which shows the pressure welding tool of the elevating unit in the Example of the climbing crane of this invention. FIG. 5 is a plan sectional view showing a state in which a stopper pin of a mast block is projected in an embodiment of a climbing crane of the present invention, and is an IV-IV sectional equivalent view of FIG. It is a plan sectional view which shows the state which the stopper pin of the mast block is embedded in the embodiment of the climbing crane of this invention. It is a top view which shows the drive system of the swinging link of the parallelogram link mechanism in the Example of the climbing crane of this invention. It is a side view which shows the operation of the swing link of the parallelogram link mechanism in the embodiment of the climbing crane of this invention. It is a front view which shows the base arm, the telescopic arm, and the carriage in the embodiment of the climbing crane of this invention. It is a top view which shows the state which carried out the embodiment of the climbing crane of this invention in a narrow place.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 9 are examples of the climbing crane of the present invention.

As shown in FIG. 1, the climbing crane of this embodiment includes a mast 1, an elevating unit 2, a swivel body 3, a base arm 4, a telescopic arm 5, a trolley 6, and a suspended load hook 7. There is.

The mast 1 is erected so as to extend in the vertical direction by connecting a plurality of mast blocks 1a formed of hollow tubular members in a stacked manner. As shown in FIG. 2, a chain plate 8 is attached to the side surface of the mast block 1a. The chain plate 8 has an elevating chain 8b extending in the vertical direction attached to the plate material 8a, and the plate material 8a has a fastening member 8c such as a bolt or nut on the side surface of the mast block 1a as shown in FIG. Is attached by.

The elevating unit 2 is arranged so as to be able to move up and down with respect to the mast 1, and includes an elevating mast 9, an elevating drive sprocket 10, and a braking sprocket 11. The elevating mast 9 covers the outer periphery of the mast 1 and is slidably arranged in the vertical direction with respect to the mast 1. The elevating drive sprocket 10 is arranged on the elevating mast 9 so as to engage with the elevating chain 8b of the chain plate 8 attached to the mast 1, and is rotationally driven by the elevating drive device 10a. The elevating drive device 10a includes a motor, a brake, and a speed reducer (not shown). The braking sprocket 11 is arranged on the elevating mast 9 so as to engage with the elevating chain 8b of the chain plate 8, and has a braking state in which rotation is locked by the elevating braking device 11a and an idling state in which rotation is allowed. It is designed to be switched to. The elevating braking device 11a includes a brake and a speed reducer (not shown).

As shown in FIGS. 2 and 3, a pressure welding tool 12 provided with a pad 12b such as MC nylon (registered trademark) at the tip of the screw portion 12a is screwed into the upper and lower parts of the elevating mast 9. The pressure welding tool 12 fixes the elevating mast 9 to the mast block 1a and transmits the moment to the mast 1 by tightening the screw portion 12a and pressing the pad 12b against the outer peripheral surface of the mast block 1a during the suspension work. When raising and lowering the elevating mast 9, the screw portion 12a is loosened so that the pad 12b is separated from the outer peripheral surface of the mast block 1a.

As shown in FIGS. 2, 4 and 5, stopper pins 13 for preventing the elevating mast 9 from falling are provided on the upper and lower parts of the mast block 1a so as to be able to protrude and immerse, and the elevating mast 9 is provided. A sensor 14 for detecting whether or not the stopper pin 13 is protruding is attached to the lower portion of the above. An internal ladder L is provided on the inner surface of the mast block 1a so that an operator can move up and down the internal ladder L to project or immerse the stopper pin 13 as necessary. ing. When it is determined by the sensor 14 that the stopper pin 13 directly below the sensor does not protrude, an alarm is issued and the operation is stopped in an emergency.

As shown in FIG. 1, the swivel body 3 is rotatably provided at the upper end of the elevating mast 9 of the elevating unit 2.

As shown in FIG. 1, the base arm 4 is arranged so as to be able to extend and retract with respect to the swivel body 3 by a parallelogram link mechanism 15. As shown in FIGS. 6 and 7, the parallelogram link mechanism 15 has a swing link 16 having a base end rotatably arranged around a pin 17 on the upper surface of the swing body 3. It is configured by connecting the base end portion of the base arm 4 extending in the horizontal direction to the tip end of the 16 with a pin 18. A swing sprocket 19 is fitted to a pin 17 at the base end of the swing link 16, a swing chain 20 is hung endlessly between the swing sprockets 19, and the swing chain 20 swings. The dynamic drive sprocket 21 is engaged, and the swing drive sprocket 21 is rotationally driven by the swing drive device 22. The rocking drive device 22 includes a motor, a brake, and a speed reducer (not shown). The rocking drive device 22 may use an orthogonal axis speed reducer type motor, and if such an orthogonal axis speed reducer type motor is used, the amount of lateral protrusion can be suppressed and saved. It is also possible to create space.

The telescopic arm 5 is arranged to be stretchable on the base arm 4. As shown in FIGS. 1 and 8, the expansion / contraction driving device 23 and the pinion 24, and the vertical roller 25 and the horizontal roller 26 are arranged at the tip of the base arm 4. As shown in FIG. 8, the telescopic arm 5 is formed of I-shaped steel in which an upper flange 5a and a lower flange 5b are connected by a web 5c, and both width ends of the upper flange 5a are vertically connected by a vertical roller 25 from above and below. It is supported so as to be sandwiched, and is also supported so as to be sandwiched from the left and right by the horizontal roller 26. A rack 27 extending in the longitudinal direction of the telescopic arm 5 is provided on the upper surface of the upper flange 5a so that the pinion 24 meshes with the rack 27. The telescopic drive device 23 includes a motor, a brake, and a speed reducer (not shown). The expansion / contraction drive device 23 uses an orthogonal axis speed reducer type motor.

The carriage 6 is arranged traversely on the telescopic arm 5. The carriage 6 includes traversing wheels 6a that can roll along the lower flange 5b of the telescopic arm 5, and the traversing wheels 6a are rotationally driven by the traversing drive device 6b. The traverse drive device 6b includes a motor, a brake, and a speed reducer (not shown). The base end portion and the tip end portion of the telescopic arm 5 are provided with a stopper 28 for preventing the carriage 6 from falling off from the base end or the tip end of the telescopic arm 5.

The hanging load hook 7 is suspended from the carriage 6 so as to be hoisted and unwound. As shown in FIG. 1, a winch 29 is provided at the base end portion of the telescopic arm 5, and a wire rope 30 unwound from the winch 29 is provided with a sheave 31 and a sheave arranged at the base end portion of the telescopic arm 5. The suspension hook 7 is attached to the lower end of the wire rope 30 by being sequentially hung around the sheave 33 provided on the carriage 6.

Note that FIG. 9 shows a state in which the climbing crane of this embodiment is deployed in a narrow area S.

Next, the operation of the above-described embodiment will be described.

When constructing or dismantling a building with a climbing crane, the elevating unit 2 is attached to the mast 1 which is erected so as to extend in the vertical direction by connecting a plurality of mast blocks 1a formed of hollow tubular members in a stacked manner. The elevating mast 9 is fitted externally, and when the elevating drive sprocket 10 is rotationally driven by the elevating drive device 10a, the elevating drive sprocket 10 rolls relative to the elevating chain 8b of the chain plate 8, and the mast The elevating mast 9 moves up and down with respect to 1.

When raising and lowering the elevating mast 9, the braking sprocket 11 is switched from a braking state in which rotation is locked by the elevating braking device 11a to an idling state in which rotation is allowed. Further, when the elevating mast 9 is raised and lowered, the pressure contact tool 12 is held in a state where the screw portion 12a is loosened and the pad 12b is separated from the outer peripheral surface of the mast block 1a. Furthermore, the stopper pins 13 arranged in the upper and lower parts of the mast block 1a are held in an immersed state as shown in FIG.

On the other hand, the braking sprocket 11 is switched to a braking state in which rotation is locked by the elevating and lowering braking device 11a during a hanging load operation such as loading and unloading of building materials. Further, during the suspension work, the screw portion 12a of the pressure welding tool 12 is tightened and the pad 12b is pressed against the outer peripheral surface of the mast block 1a, whereby the elevating mast 9 is fixed to the mast block 1a and the moment is masted. It is transmitted to 1. Furthermore, during the suspension operation, the stopper pin 13 is held in a protruding state as shown in FIG. When it is detected by the sensor 14 attached to the lower part of the elevating mast 9 that the stopper pin 13 directly underneath does not protrude, an alarm is issued and the operation is stopped in an emergency. As a result, it is possible to prevent the elevating mast 9 from falling.

When the swing drive sprocket 21 is rotationally driven clockwise in FIG. 7 by the swing drive device 22 while the elevating mast 9 is fixed to the mast block 1a, the swing drive sprocket 21 is hung between the swing sprocket 19 in an endless manner. The swing chain 20 circulates counterclockwise in FIG. 7, the swing link 16 of the parallelogram link mechanism 15 swings in a direction tilted to the left in FIG. 7, and the base arm 4 , Overhangs from the swivel body 3. Further, when the pinion 24 is rotationally driven clockwise in FIG. 1 by the telescopic drive device 23, the telescopic arm 5 moves in the direction of extending from the base arm 4 via the rack 27. On the other hand, when the swing drive sprocket 21 is rotationally driven counterclockwise in FIG. 7 by the swing drive device 22 while the lift mast 9 is fixed to the mast block 1a, the swing drive sprocket 21 is inserted between the swing drive sprocket 19. The swing chain 20 hung in an endless manner circulates clockwise in FIG. 7, and the swing link 16 of the parallelogram link mechanism 15 swings in a direction tilted to the right in FIG. , The base arm 4 is pulled toward the swivel body 3. Further, when the pinion 24 is rotationally driven counterclockwise in FIG. 1 by the telescopic drive device 23, the telescopic arm 5 moves in the direction of contraction with respect to the base arm 4 via the rack 27.

When the traverse wheel 6a is rotationally driven by the traverse drive device 6b in parallel with the extension / retracting operation of the base arm 4 and the expansion / contraction operation of the telescopic arm 5, the carriage 6 traverses along the telescopic arm 5. Here, since the stopper 28 is provided at the base end portion and the tip end portion of the telescopic arm 5, the dolly 6 does not fall off from the base end or the tip end of the telescopic arm 5. Further, when the wire rope 30 is wound up by the winch 29, the hanging load hook 7 is wound up from the trolley 6, and when the wire rope 30 is unwound by the winch 29, the hanging load hook 7 is unwound from the trolley 6 and the suspended load is loaded. Is raised or lowered.

In the case of this embodiment, unlike the conventional climbing crane, the base arm 4 which is arranged so as to extend and retract on the swivel body 3 and the telescopic arm 5 which is arranged so as to expand and contract on the base arm 4 are provided. Since it is adopted and the occupied area during work can be suppressed, even in a narrow area S as shown in FIG. 9, when turning, it is only necessary to pull in the base arm 4 and contract the telescopic arm 5, as in the conventional case. It is not necessary to raise a jib to avoid contact with adjacent objects, which improves workability.

Further, since the base arm 4 and the telescopic arm 5 do not need to stand up like a conventional jib, the position of the center of gravity does not rise, and the base arm 4 and the telescopic arm 5 are less likely to be fanned even in a strong wind, and stability. Will increase.

Furthermore, since the base arm 4 can be pulled into the swivel body 3 and the telescopic arm 5 can be transported by truck and assembled at the construction site, the climbing crane can be easily transported and assembled. It is also very effective in increasing the swelling.

In this way, the overall compactness can be achieved, and the workability and stability in the narrow area S can be improved.

Then, in the case of the present embodiment, the elevating unit 2 covers the outer periphery of the mast 1 and is slidably arranged in the vertical direction with respect to the mast 1, and the elevating mast 9 and the chain plate attached to the mast 1. It includes an elevating drive sprocket 10 arranged on the elevating mast 9 so as to engage with the chain plate 8, and a braking sprocket 11 arranged on the elevating mast 9 so as to engage with the chain plate 8. With this configuration, when constructing or dismantling a building with a climbing crane, the elevating mast 9 of the elevating unit 2 is externally fitted to the mast 1 erected so as to extend in the vertical direction, and the elevating drive sprocket 10 is rotationally driven. The elevating drive sprocket 10 can be rolled relative to the elevating chain 8b of the chain plate 8 to smoothly elevate the elevating mast 9 with respect to the mast 1. On the other hand, the elevating mast 9 can be reliably fixed to the mast 1 by switching the braking sprocket 11 to a braking state in which the rotation is locked during the lifting work such as loading and unloading of building materials.

Further, the mast 1 is formed of a hollow tubular member, and includes a stopper pin 13 that projects outward to prevent the elevating mast 9 from falling. With this configuration, the elevating mast 9 can be prevented from falling by holding the stopper pin 13 in a protruding state during the suspension work.

Further, it also includes a parallelogram link mechanism 15 that disposes the base arm 4 so as to extend and retract with respect to the swivel body 3. With this configuration, the base arm 4 does not have to be undulated as in the conventional jib, which is effective in improving workability and stability in strong winds.

The climbing crane of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

1 Mast 2 Elevating unit 3 Swivel 4 Base arm 5 Telescopic arm 6 Bogie 7 Suspended load hook 8 Chain plate 9 Elevating mast 10 Elevating drive sprocket 11 Braking sprocket 13 Stopper pin 15 Parallelogram link mechanism

Claims (3)

A mast that is erected so as to extend in the vertical direction,
An elevating unit that can be elevated and lowered with respect to the mast,
A swivel body provided on the elevating unit so as to be swivel
A base arm that is freely extended and retracted to the swivel body,
A telescopic arm that is stretchably arranged on the base arm,
A dolly that is freely arranged on the telescopic arm and
A hanging load hook that can be freely hoisted and unwound from the trolley ,
It is equipped with a parallelogram link mechanism that allows the base arm to extend and retract with respect to the swivel body.
In the parallelogram link mechanism, the base end of the swing link is rotatably arranged on the upper surface of the swing body around a pin, and the base end of the base arm extending horizontally to the tip of the swing link. It is composed by connecting the parts with pins,
A swing sprocket is fitted to the pin at the base end of the swing link, a swing chain is hung endlessly between the swing sprockets, and a swing drive sprocket is engaged with the swing chain. The rocking drive sprocket is rotationally driven by the rocking drive device.
The rocking drive device is a climbing crane characterized by being an orthogonal axis speed reducer type motor . The elevating unit
An elevating mast that covers the outer circumference of the mast and is slidably arranged in the vertical direction with respect to the mast.
An elevating drive sprocket disposed on the elevating mast so as to engage the chain plate attached to the mast.
The climbing crane according to claim 1, further comprising a braking sprocket disposed on the elevating mast so as to engage the chain plate. The mast is made of a hollow tubular member.
The climbing crane according to claim 2, further comprising a stopper pin that projects outward to prevent the elevating mast from falling.

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