JPH063034Y2 - Lift device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a lifting device. That is, the present invention relates to a lift device for transporting luggage, equipment, materials, workers, etc. between a high place such as a building and the ground.

"Prior Art" Such a lifting device includes a multi-stage boom that can be undulated and expanded and contracted, and a bucket that is loaded with luggage or the like and moved up and down along the boom.

There are various types of boom undulation, extension and contraction, and positioning methods, but the following method has been recently developed.

That is, there has been developed a system in which a winch device is attached to an object at a high place in advance, the wire is hung between a boom on the ground, and then wound and unwound to appropriately raise, retract, and position the boom.

"Problems to be solved by the invention" By the way, this recent conventional lift device can raise and retract the boom with a single winch device, compared to the conventional example that required a dedicated device up to that point. It has the advantages of simple structure, easy operation, light weight, excellent strength and safety, and easy positioning by setting the wire guide. On the other hand, the following 1st, 2nd, 3rd The problem was pointed out.

That is, in these recent conventional examples, firstly, when the boom is raised / lowered / extended, or particularly when carrying a load or the like with a high-altitude object, the wire of the winch device is attached to the boom, the bucket, the load, or the like. The weight of the bucket truck, its leveling mechanism, and other various parts is high.

If a problem occurs in the winch device, such as disconnection of the wire or opening of the lock, there is a danger that the boom will be shortened abruptly and fall, leading to a serious accident.

Second, the weight of various members is applied to the wire of the winch device. Therefore, it was pointed out that destruction or the like would occur in high altitude objects to which the winch device was attached. That is, for example, there is a case where a force is applied to a veranda, a rooftop, a side wall of a staircase landing, or the like, which is a target of high places, and is damaged or destroyed.

Thirdly, before and after the transportation of luggage and the like, the lift device is transported on the ground for preparation and removal. Then, the boom is shortened and stored, and is transported in a horizontal position. At that time, the stored distal boom and intermediate boom may pop out and extend from the proximal boom, which may hinder transportation and pose a risk. It was also.

In the conventional example, such a point was pointed out.

The present invention has been made in view of the above circumstances in order to solve the problems of the above-mentioned conventional example, and by having a predetermined drum, extension lock wire, shortening lock wire, ratchet device, etc., First, even if a problem such as wire cutting occurs in the winch device, the boom will not be sharply shortened and will not fall down. Second, the side walls of high places will not be destroyed, and third, when the boom is transported. The purpose is to propose a lift device that also prevents popping out.

"Means for Solving the Problem" The technical means of the present invention for achieving this object are as follows.

This lift device is provided with a multi-stage boom that can be undulated and expanded and contracted, a bucket that is loaded with luggage or the like and that is moved up and down along the boom, and that is attached to a high-altitude target and that is suspended between the boom and the boom. A winch device for hoisting and extending the boom with a wire is provided.

It further comprises the next drum, an extension lock wire and a shortening lock wire, and a ratchet device.

The drum is attached to the boom on the proximal end side of the boom.

The extension lock wire and the contraction lock wire are fastened to the drum at one end and wound in opposite directions,
In addition, it is bridged through sheaves provided at respective predetermined positions of the base end side boom, and the other ends are fixed to the tip end side boom of the boom.

Two ratchet devices are provided coaxially with the drum and in opposite directions to each other, and lock the boom via the extension lock wire and the shortening lock wire.

The lift device according to claim 2 is as follows.

That is, the shortening lock wire is laid between the sheave provided on the base end side boom and the tip end side boom via sheaves provided on the base end portion and the tip end portion of the intermediate boom.

"Operation" Since the lift device according to the present invention comprises such means, it operates as follows.

First, a winch device is attached to an object at a high place, the wire is hung between a boom on the ground, and then the wire is wound and unwound, whereby the boom is appropriately raised, retracted, and positioned. Then, the bucket moves up and down, and the luggage and the like are transported between the high-altitude target and the ground.

Now, here, between the base end side boom and the tip side boom,
Further, in claim 2, the extended lock wire and the shortened lock wire are further bridged via the intermediate boom. The boom is appropriately locked for extension, contraction, or expansion / contraction by the engagement of either one or both ratchet devices.

Therefore, the following 1st, 2nd, and 3rd are performed.

First, even if a problem such as wire cutting occurs in the winch device, since the boom is locked by the engagement and positioned and fixed, it does not suddenly shorten and fall.

Secondly, by locking and positioning and fixing the boom by such engagement, the weight of the boom and other various members is not applied to the side wall or the like targeted at high places, and the destruction thereof is prevented.

Thirdly, even when the boom is being transported for preparation or removal, the boom is shortened due to the locking due to such engagement.
It is stored and held, and it does not pop out or expand.

[Embodiment] The present invention will be described in detail below based on the embodiment shown in the drawings.

First, the configuration and the like will be described in order of the lift device, the drum and the ratchet device, and the extension lock wire and the contraction lock wire.

The lift device is roughly as follows.

FIGS. 3 and 4 are side views showing an example of a lifting device, FIG. 3 shows a state when carrying a load, etc., and FIG. 4 shows a state when storing the boom etc. on the ground, respectively. Shows.

This lift device is attached to a high-altitude object such as a foldable and expandable / contractible multi-stage boom 1, a bucket 3 on which luggage 2 and the like 2 is loaded and moved up and down along the boom 1, a veranda 5 of a middle-high-rise building 4, and the like. A winch device 7 is provided for hoisting and extending the boom 1 by means of the wire 6 that is hung between the boom 1 and the boom 1.

First, the boom 1 is composed of a base end side boom 8, an intermediate boom 9 attached to the base end side boom 8 so as to be extendable and contractible, and a tip side boom 10 attached to the intermediate boom 9 so as to be extendable and contractible. ing. For this boom 1,
Nested and ladder type is used, in addition to the three-stage type shown, two-stage type without intermediate boom 9, four-stage type with two intermediate booms 9 and others There is a multi-stage type.

Then, the truck 11 travels on the boom 1. That is, the carriage 11 is provided with wheels 12, and a wire 13 is provided at the tip thereof.
One end of the boom is locked, and this wire 13 is attached to the tip side boom 10.
The other end is connected to an electric winch 16 provided on the proximal boom 8 via a pulley 14 provided on the distal end portion and a pulley 15 provided on the proximal end portion of the proximal boom 8.
Then, by driving the electric winch 16 to wind and unwind the wire 13, the carriage 11 travels on the boom 1 from its tip to its base.

The bucket 3 has a pedestal 11 pivotally mounted on such a dolly at one end by a pin 17 and the other end supported by a connecting rod 19 of a horizontal maintaining mechanism 18. By appropriately adjusting the length or angle of the connecting rod 19, the bucket 3 is always maintained in a horizontal posture regardless of the ups and downs of the boom 1. The bucket 3 has a box-like shape with an open upper surface, and the luggage 2 or the like, that is, luggage, equipment, materials, workers, etc. are loaded therein.

The winch device 7 includes a frame 21 on the side wall 20 of the veranda 5 and the like.
It is attached and fixed with a thumbscrew 22 or the like via the. One end of the wire 6 is wound or unwound by the rotation of the handle 23, and the hook 25 provided at the other end 24 of the wire 6 is provided with a locking ring provided at the tip of the tip side boom 10. It is designed to be locked to 26.

Reference numeral 27 in the figure is a supporting leg, and the supporting leg 27 having a ground plate swingably at its lower end is attached to the base end of the base end side boom 8 so as to be able to move forward and backward, and supports the standing boom 1 on the ground. To do.

Reference numeral 28 in the drawing denotes a stay, and this stay 28 is provided with, for example, a hydraulic cylinder 29, the tip end of which is pivotally attached to the tip end portion of the base end side boom 8 via a bracket 30, and the base end thereof is provided with a pad 31 via a universal joint. Is installed. Then, for example, by adjusting the expansion and contraction using the hydraulic cylinder 29, the standing boom 1 is stably supported on the ground via the pad 31.

Further, in the figure, reference numeral 32 denotes an undulating wheel, and this undulating wheel 32
Is pivotally attached to the base end of the base end side boom 8 via a bracket 33, and holds the boom 1 in the course of undulation on the ground.

Reference numeral 34 in the drawing denotes a carrying wheel. The carrying wheel 34 is pivotally attached to the base end side boom 8 via a bracket 35, and is used when the boom 1 is run on the ground for carrying. Further, M in the figure is an inclinometer.

The lift device is roughly as described above.

Next, the drum and ratchet device will be described.

FIG. 1 is a schematic side view of an essential part showing an embodiment of a lift device according to the present invention. FIG. 2 is a perspective view showing the drum, ratchet and the like.

The drum 36 is rotatably attached to the proximal boom 8 via a bracket 37. The drum 36 is provided with two ratchet devices, that is, an extension lock ratchet 38 and a shortening lock ratchet 39, which are coaxial and opposite to each other.

The extension lock ratchet 38 locks extension of the boom 1 via an extension lock wire 40 described later, and the shortening lock ratchet 39 locks shortening of the boom 1 via a shortening lock wire 41 described below.

That extension locking ratchet 38 includes a drum 36 coaxial with the ratchet serving ratchet body 38 _1, corresponding to and a ratchet pawl 38 ₂ which is pivotally attached to the bracket 37. And by engaging the ratchet pawl 38 ₂ of the elongated locking ratchet 38 of the ratchet body 38 _1, the drum 36 is unable to rotate in the direction, for example counterclockwise feed the elongated locking wire 40. It should be noted that in this case, since in the opposite clockwise slides lifted ratchet pawl 38 ₂ to ratchet body 38 _1, the drum 36
Are rotatable in the same direction.

The shortening locking ratchet 39 includes a drum 36 coaxial with the ratchet serving ratchet body 39 _1, and a corresponding ratchet pawl 39 ₂ which is pivotally attached to the bracket 37. And by engaging the ratchet pawl 39 ₂ of the shorter locking ratchet 39 of the ratchet body 39 _1, the drum 36 is unable to rotate in the direction, for example clockwise feed the shortened lock wire 41. Note that the counter-clockwise direction in this case the opposite direction, the ratchet pawl 39 ₂ slides lifted against the ratchet body 39 _1, the drum 36
Are rotatable in the same direction.

The drum 36, the extension lock ratchet 38, and the contraction lock ratchet 39 are formed as described above.

Next, the extension lock wire 40 and the shortening lock wire 41 will be described.

First elongated locking wire 40 has one end 40 ₁ is fastened to the drum 36, for example, as wound in a clockwise direction. And this extended locking wire 40 is passed over through the sieve 42 provided at the proximal end of the proximal boom 8, the other end 40 ₂ is fixed to the proximal end of the distal boom 10.

The shortened lock wire 41 has one end 40 ₁ at the drum 36.
It is fastened to and is wound in the counterclockwise direction, for example. Then, the shortening lock wire 41 is passed through a sheave 43 provided at the tip end portion of the base end side boom 8 and then sequentially applied to sheaves 44 and sheaves 45 provided at the base end portion and the tip end portion of the intermediate boom 9, respectively. after passed, the other end 41 ₂ is fixed to the proximal end of the distal boom 10.

Note that when the boom 1 is 2-stage regardless of the three-stage shown, shorter locking wire 41 after a sheave 43, direct the other end 41 ₂ is fixed to the proximal end of the distal boom 10. When the boom 1 is of a four-stage type, the shortening lock wire 41 is successively wound between the sheaves 44 and the sheaves 45 provided at the base end portion and the tip end portion of the plurality of intermediate booms 9 respectively. The other end 41 ₂ is fixed to the base end of the tip side boom 10.

The extension lock wire 40 and the shortening lock wire 41 are
As described above, the same drum 36 is wound in the opposite direction. So when the boom 1 is extended,
The extension lock wire 40 is drawn out to follow the drum 3
6 rotates counterclockwise, and the shortening lock wire 41 is wound up. On the contrary, when the boom 1 is shortened, the shortened lock wire 41 is fed out following the drum 1, the drum 36 is rotated clockwise, and the extension lock wire 40 is wound.

The extension lock wire 40 and the contraction lock wire 41 are formed in this way.

The above is the description of the configuration and the like.

The operation and the like will be described below.

First, the winch device 7 is attached to the side wall 20 of the veranda 5 of the middle- and high-rise building 4, and setting is performed.

That is, the hook 6 of the wire 6 fed out of the winch device 7 is locked to the locking ring 26 of the boom 1 which is stored and traveled on the ground by the transportation wheels 34 to be transported and prepared. Hand over (see Figure 4).

Then ratchet claw 3 of ratchet 39 for shortening lock
9 When ₂ engages the ratchet body 39 _1, the drum 36
Cannot rotate in the direction in which the shortened lock wire 41 is fed out. Therefore, the shortening lock wire 41 cannot be fed out, and the extension lock wire 40 cannot be wound up.
Only the shortening of the boom 1 is locked and it cannot be shortened.

Then, the wire 6 is wound by rotating the handle 23. Then, the boom 1 gradually stands up while being held by the hoisting wheels 32 on the ground side, and is pulled out from the base end side boom 8 to the tip end side boom 10 and the intermediate boom 9 to be extended. Then, the tip of the tip side boom 10 is guided to the side wall 20 of the veranda 5 while being guided by the wire 6 and positioned (see FIG. 3).

Ratchet pawl 38 ₂ of the elongated lock ratchet 38 herein is the ratchet body 38 ₁ is not engaged. Therefore, the extension lock wire 40 is fed out following the extension of the boom 1 and the shortening lock wire 41 is wound (see FIG. 1).

Thereafter, the extension lock ratchet 38 is also engaged to lock the extension of the boom 1, and the stay 28, the support legs 27, etc. are adjusted, and the winch device 7 is also locked. Therefore, the boom 1 is connected to the wire 6 of the winch device 7 on the veranda 5 side.
And the support leg 27 and the pad 31 on the ground side are stably locked and positioned and fixed.

When the setting is completed in this way, the bucket 3
Is moved up and down between the front end and the base end of the boom 1 by the carriage 11, and the luggage 2 or the like is transported between the veranda 5 and the ground.

When the transportation of the luggage 2 is completed, the boom 1 is stored.

That contrast with this task described above, the ratchet body 38 and ratchet pawl 38 ₂ of the elongated lock ratchet 38 ₁
The drum 36 is engaged with the extension lock wire 4
It cannot be rotated in the direction of 0. The extension lock wire 40 cannot be fed out, and the shortening lock wire 41 cannot be wound up, so that the extension of the boom 1 is locked and cannot be extended.

On the contrary, the lock for shortening the boom 1 is released. That is, the ratchet pawl 39 of the ratchet 39 for shortening lock
Disengage the ratchet body 39 ₁ of _2, shortening the locking wire 41 is fed out by following the described below shortening of the boom 1, elongated locking wire 40 is wound up.

Then, the lock of the winch device 7 is also released, and the wire 6 is gradually extended. The stay 28 is also shortened. Then, the boom 1 is gradually collapsed and stored in the proximal boom 8 as the intermediate boom 9 and the distal boom 10 to be shortened.

Then, the boom 1 becomes horizontal on the ground (see FIG. 4), the engagement with the wire 6 is released, the stay 28 is assembled to the base end side boom 8, and the support leg 27 is attached to the base end side boom 8. Ratchet 3 for both locks
After the wheels 8 and 39 are also engaged, the wheels 34 for transportation travel on the ground to be transported and removed. The winch device 7 is also removed from the veranda 5.

As described above, the boom 1 is appropriately extended by the engagement of one or both of the extension lock ratchet 38 and the shortening lock ratchet 39 via the drum 36, the extension lock wire 40, the shortening lock wire 41, and the like. Locked, shortened locked, or telescopic locked.

Then, the following 1st, 2nd, and 3rd situations occur.

First, if the winch device 7 has a problem such as disconnection of the wire 6 and release of its lock, the following occurs.
That is, in this case as well, the boom 1 is locked and positioned and fixed by one of the engagements when the boom 1 is raised and retracted and by both the engagements when the luggage 2 is transported. Therefore, the boom 1 does not suddenly shorten and fall.

Secondly, by locking and positioning and fixing the boom 1 by such engagement, the weight of the boom 1 and other various members is not applied to the side wall 20 and the like to which the winch device 7 is attached, and the destruction thereof is prevented.

Thirdly, even during transportation of the boom 1 for preparation or removal, the boom 1 is shortened due to the lock due to the above engagement.
It is stored and held, and it does not pop out or expand.

The above is the description of the operation and the like.

"Effect of the Invention" As described above, the lift device according to the present invention has the predetermined drum, the extension lock wire, the shortening lock wire, the ratchet device, and the like, and thus exhibits the following effects.

First, even if a problem such as wire cutting occurs in the winch device, the accident that the boom is suddenly shortened and falls is eliminated,
The safety is significantly improved.

Secondly, damage and destruction are reliably prevented on the side walls of the veranda, rooftop, stairs landing, etc., which are targeted for high places, to which the winch device is attached.

Thirdly, when the boom is transported, the distal boom and the intermediate boom do not pop out and extend from the base end side boom, and the transportation is facilitated and the safety is improved.

As described above, there are some remarkable and significant effects such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

FIG. 1 is a schematic side view of an essential part showing an embodiment of a lift device according to the present invention. FIG. 2 is a perspective view showing the drum, ratchet and the like. FIGS. 3 and 4 are side views showing an example of a lifting device, FIG. 3 shows a state of carrying a load, etc., and FIG. 4 shows a state of storing the boom on the ground, Shown respectively. 1 ... Boom 2 ... Luggage 3 ... Bucket 5 ... Veranda (for high places) 6 ... Wire 7 ... Winch device 8 ... Proximal boom 9 ... Intermediate boom 10 ... Tip boom 36 ... Drum 38 ... Extension ratchet ( Ratchet device) 39 ... shortening lock ratchet (ratchet device) 40 ... extension lock wire 40 ₁ ... one end 40 ₂ ... other end 41 ... shortening lock wire 41 ₁ ... one end 41 ₂ ... other end 42 ... sheave 43 ... sheave 44 ... sheave 45 ... sieve

Claims (2)

[Scope of utility model registration request] 1. A multistage boom capable of undulating and expanding and contracting, and a bucket for carrying luggage and the like, which is moved up and down along the boom.
A winch device, which is attached to an object at a high place and which raises and lowers and expands and contracts the boom by means of the wire hung between the boom and the boom, comprises a drum attached to the boom on the base end side of the boom, and a winch device. , One end of each of which is fastened to the drum and wound in opposite directions, and which is bridged through sheaves provided at respective predetermined positions of the base end side boom, and the other end of which is attached to the tip end side boom of the boom. The extended lock wire and the shortened lock wire, which are fixedly attached, and two of which are coaxial with the drum and are provided in opposite directions to each other,
Through the extension lock wire and the shortening lock wire,
And a ratchet device for locking the booms, respectively. 2. The shortening lock wire is stretched between the sheave provided on the base end side boom and the tip end side boom via sheaves provided on the base end portion and the tip end portion of the intermediate boom, respectively. The lift device according to claim 1, wherein: