JP2003040587A - Vehicle for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle for high lift work capable of reinforcing safety actions for slinging to a working platform. SOLUTION: In this vehicle for high lift work, a working platform 4 having a handrail 5 on the outer periphery is installed at the tip of an elevating and telescopic boom 3. When a swingable crane 7 is disposed on the working platform 4, the portion 5a of the handrail 5 coming into contact with a route for a lifted load formed by the swing Y of the crane 7 is formed openable and closable within the range in which the lifted load can be passed through.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an aerial work vehicle.

[0002]

2. Description of the Related Art Aerial work vehicles are equipped with a work floor at the tip of a boom that can be raised and lowered and retracted, as seen in overhead line construction in the city, for example. It is used to perform overhead line construction. By the way, recently, mobile cranes, which are construction machines, have been modified for aerial work vehicles, and bridge construction work at super-high places of 30 to 80 m, tower construction work, construction work without scaffolding and civil engineering work, etc. There are some that can be applied to heavy work in. Examples of civil engineering work include drilling work to improve soil quality on cliffs and slopes, pouring grout materials such as lime and cement into the drilled holes, excavation work on cliffs and slopes, and rocks in quarries. An example is a drilling operation of a dynamite injection hole on a wall. Therefore, a work machine such as a drilling machine and a hydraulic excavator (so-called "small hydraulic power shovel") can be freely mounted on the work floor, and a crane or the like is sometimes arranged as an auxiliary machine. Therefore, the work floor is, for example, 3m x 5m in length and width.
Since it is widely used in super high places, the work floor for the above-mentioned overhead wire construction is small enough that one worker can board with the outer circumference surrounded by a cloth cylinder etc. It is possible for multiple workers to board.

[0003]

By the way, in the above aerial work vehicle which is obtained by modifying the mobile crane or the like, after the work floor is positioned and stopped at the high place and the super high place, the operation from the work floor is stopped. For the sake of work efficiency, there is almost no case where the boom is shortened and the work floor is lowered to lower the work floor to the surface of the ground except when the person goes in and out. Therefore, the replenishment of consumable materials generated in each of the above-mentioned operations is carried out by using a crane arranged in advance on the work floor or by using another crane arranged in the vicinity of the aerial work vehicle. Even for aerial work vehicles with a crane placed on the work floor, when the boom hoisting angle is small, the boom extension is long, and when the consumable material is a heavy object and the consumable material is a super heavy object, The crane may be removed from the work floor to reduce the boom load, and the reduction may be allowed to allow the consumable material to be loaded and replenished on the work floor. At this time, another crane is arranged in the vicinity of the aerial work vehicle to supplement the consumable material on the work floor. Examples of consumable materials include building members for bridge construction, steel tower erection work, and construction work, and grout pipes that insert grout materials into holes when drilling soft soil to guide them into the ground. it can.

That is, in the above aerial work vehicle obtained by modifying the mobile crane, a crane arranged on the work floor is used, or another crane arranged near the aerial work vehicle is used. However, as is well known, rigorous safety measures are required for slinging with a crane.

As a security action according to the present invention, first, a suspended load (consumable material, etc.) is not lifted higher than necessary. Specifically, the suspended load from the ground is hung and moved to a predetermined position on the work floor so that the load is slid near the upper surface of the work floor, for example, at a height of 10 to 20 cm, and then gently lowered, whereby the height is increased. This is because the prevention of shaking of the work floor at high places and super high places is directly linked to the safety action on the sling.

In addition, when arranging the crane on the work floor, it is important not only to select the arranging position but also to reduce the weight of the crane. If the weight is reduced, there will be a margin in the allowable load of the boom, and the larger the margin, the more
This is because it is possible to enhance security activities by slinging.

In view of the above facts, it is an object of the present invention to provide an aerial work vehicle capable of enhancing the security action for slinging on the work floor.

[0008]

In order to achieve the above object, the aerial work vehicle according to the present invention is, firstly,
In an aerial work vehicle that has a work floor equipped with handrails on the outer periphery at the end of a boom that can be undulated and extended, when a swingable crane is placed on the work floor, a The feature is that the part can be opened and closed within the range where the suspended load can pass.

According to the first construction, when the part of the handrail is opened and closed when slinging on the work floor of the crane, the original arrangement area of the part becomes empty. Therefore,
For example, even if the crane is turned to a height of 10 to 20 cm and the crane is turned, the suspended load does not originally collide with the handrail in the placement area, and the suspended load can be slid and moved near the upper surface of the work floor. Then, it can be gently lowered to a predetermined position on the work floor. In other words, it is possible to prevent shaking of the work floor at a high place, and it is possible to further enhance the safety action by slinging. Examples of the opening and closing of the handrail part include vertical movement of the handrail, push-pull operation within the work floor, lateral slide operation, and detachable operation. Also, being able to lower the suspended load means being able to shorten the length of the crane. In other words, the rigidity of the crane can be reduced. In other words, the weight of the crane does not hinder the slinging. That is, the weight of the crane may be reduced, and in this case, there is a large margin in the allowable load of the boom due to the weight reduction, and the safety conditions for slinging can be further enhanced. Further, if the length of the crane is shortened, the freedom of movement of passengers on a narrow work floor is increased. That is, according to the aerial work vehicle of the first configuration, the aerial work vehicle can greatly enhance the safety action for slinging on the work floor.

Secondly, in an aerial work vehicle having a work floor provided with a handrail on the outer periphery at the tip of a boom that can be undulated and retracted, a part of the handrail is openable and closable. When arranging a swingable crane on the work floor when it is used as an occupant entrance / exit to the passenger, the entrance / exit is located in the path of the suspended load due to the turning of the crane, and the suspended load can pass through the entrance / exit. As described above, the crane is arranged.

The second structure is as follows. The work floor is usually provided with an entrance for passengers to get on the work floor. In this case, the doorway may be a door that opens and closes by pushing and pulling inward and outward when viewed from the work floor. However, in the second configuration, "a part of the handrail can be opened and closed. In some cases, the department is used as a passenger entrance to the work floor. " In the latter case, there is no reason not to use this doorway as in the first configuration. This is because the same effect as that of the first configuration can be obtained by using it. Therefore, in this second configuration, the doorway and the swingable crane are associated in the same manner as in the first configuration. Therefore,
According to the second configuration, it is possible to obtain the same effects as the first configuration.

Thirdly, in an aerial work vehicle having a work floor provided with a handrail on the outer periphery at the tip of a boom that can be undulated and extended, a part of the handrail can be opened and closed, and a part of the work floor can be opened and closed. It is characterized in that it is provided with a portion that can be opened and closed within the range where the load of the crane can pass, in addition to the handrail when it is used as a passenger entrance and exit.

The above-mentioned third structure is as follows. As described in the section of "Problems to be solved by the invention",
Some aerial work vehicles do not have a crane mounted, and even if a crane is mounted, there are also works in which the crane must be removed to perform the work. Furthermore, even if a crane is mounted on an aerial work vehicle, depending on the location of the crane on the work floor, the position and orientation of the work floor, and the terrain around the location of the aerial work vehicle, it may be necessary to suspend the load above the ground. There are some cases where you can't sling. The above-mentioned third configuration takes such a case into consideration. In addition, in this third configuration, "the other part of the handrail is provided with a part that can be opened and closed within a range through which the load of the crane can pass", as long as it is a place other than the passenger entrance and exit. It indicates that any number of "parts" may be provided on the handrail, and any number of "parts" may be provided. That is, according to the said 3rd structure, it will be slinged using the other crane arrange | positioned in the vicinity of an aerial work vehicle.
In this case, it is of course possible to sling with the same operational effect as the operational effect of the first configuration, but in addition to this, the effect that the degree of freedom of the location of the other crane is greatly expanded occurs. This is because, regardless of the position and direction of the work floor, even if other cranes are appropriately arranged, the slinging can be performed while keeping a safe guard. And, the effect that the degree of freedom of the location of other cranes is significantly expanded is extremely effective in the actual work where the location of other cranes is likely to be limited in mountainous areas where aerial work vehicles are likely to be introduced and in towns. It is a remarkable and important effect.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an aerial work vehicle according to the present invention will be described below. 1 to 10 show the first embodiment. It should be noted that the example machine as the embodiment has a configuration in which the grout method is applied to the ground slope which is soft soil.
As shown in FIG. 3, the mobile crane is modified. That is, as shown in FIG. 1, the example machine has a self-propelled lower traveling body 1, an upper revolving body 2 rotatably provided on the lower traveling body 1, and an undulating and retractable structure on the upper revolving body 2. It has a boom 3 provided and a work floor 4 provided at the tip of the boom.
The work floor 4 has a handrail 5 fixed to the outer periphery thereof. That is, in the example machine, the hook hanging from the boom tip of the main body of the mobile crane is replaced with the work floor 4.

The work floor 4 can be further raised and lowered by the extension and contraction of a cylinder 32 around a horizontal pin 31 provided at the tip of the boom, and can be swung by a turning mechanism (not shown) about a vertical axis 4a on the work floor 4. ing. The work floor 4 is rectangular as shown in FIG. 2 which is a plan view thereof, and the vertical axis 4a shown in FIG. And
Similarly, as shown in FIG. 1, a boring machine 6 as a working tool is mounted on the left side of the work floor 4 in the drawing, while a crane 7 is mounted on the right end of the drawing. In addition, the grout construction method performed by the example machine is performed by drilling a slope with the drilling machine 6 and lifting the crane from the ground by the crane 7 (in this embodiment, 13 tubes are collectively hung), and the above-mentioned grout pipes are collected on the work floor 4. It consists of inserting one or two holes into the drilled holes (first step) and collectively injecting the grout material into each grout tube (second step). Although the example machine controls these first and second steps, FIG. 1 shows a configuration that controls only the first step.

By the way, FIG. 1 shows the traveling posture of the example machine, and FIG. 2 shows a plan view of the work floor 4 of FIG. 1. This FIG. 2 is a side view of FIG. As in FIG. 3, the work postures at high altitude and ultra high altitude are shown. It should be noted that FIG. 1 shows not only the running posture but also the work standby posture.
Then, in the standby posture of FIG. 1, the occupant 8 (see FIG. 2) directly gets on the work floor 4 from the lower traveling body 1 through the stairs.
In addition, there are some large-sized aerial work vehicles that ride on the work floor 4 from the lower traveling body 1 through a passage provided on the boom 3.

On the work floor 4, an operation panel for the occupant 8 to perform a turning operation on the upper swing body 2, a hoisting operation and a telescopic operation on the boom 3, a hoisting operation and a turning operation on the work floor 4, and the like. It is prepared. Of course, the occupant 8 also operates the boring machine 6 and the crane 7 (relief X, turn Y, and hoisting / unwinding Z shown in FIG. 3). still,
The traveling operation of the undercarriage 1 and the extension / retraction operation of the outriggers (not shown) cannot be performed by the passenger 8 in order to ensure safety.

That is, as shown in FIG. 3, the crane 7 is operated by the occupant 8 as described above, and the grout pipe 9 as a supplementary material is lifted from the ground (not shown) by the operations X, Y and Z, and this is lifted up from the ground. Pick up at a fixed position on 4 and collect cargo. At the fixed position, the grout pipe 9 is prevented from rolling on the work floor 4 and is prevented from falling to the ground, and the occupant 8 is prevented from rolling.
The grout tube holding guide 10 is detachably provided so as not to hinder the walking of the robot. It is detachable because the example machine is engaged in other excavation work, for example, and a hydraulic excavator for that purpose is mounted on the work floor 4.

In the first embodiment, as shown in the partial perspective view of the work floor 4 in FIG.
The part 5a of the handrail 5 that is in contact with the suspended load path is opened and closed in the up-down direction X1 within a range where the suspended load can pass.
Note that the path of the suspended load due to the turning Y changes depending on the undulation angle, but this also falls within the turning path (the same applies to the "claims"). The details are as shown in FIGS. In addition, "the part 5a of the handrail 5 that corresponds to the path of the suspended load (that is, the part 5a of the handrail 5 that can be opened and closed)"
Will be simply referred to as "handrail portion 5a" hereinafter.

FIG. 5 is a partially enlarged view of the handrail portion 5a of FIG. 4 and its periphery. As shown in FIG. 5, one end (right end in the drawing) of the handrail part 5a is pin-connected by a horizontal pin 51 to an end of the right handrail 5 fixed to the work floor 4 as illustrated in FIG. ing. The lateral pin 51 is a reamer bolt, and the reamer portion is fitted into the handrail portion 5a and the pin holes 52 of the handrail 5. Double nut 5 is attached to the end of the horizontal pin protruding from the pin hole 52.
3 is screwed in, so that the horizontal pin 51 cannot be put in and taken out, and as a result, the handrail portion 5a is located in the above-mentioned FIG. 4 and FIG.
As shown in FIG. 5, it can be opened and closed in the vertical direction X1.

On the other hand, the other end (left side in the figure) of the handrail part 5a shown in FIG.
It is detachably fixed to the end portion of the handrail 5 on the left side in the figure that is fixed to. That is, as shown in FIG. 7, an upper part and a right part in the figure are opened at the end of the handrail 5, and a hole 5 is formed at the bottom.
A box 54 having 4a is fixed.

That is, as shown in FIG. 5, the handrail portion 5a is rotated downward X1 so that the downward bent portion 5a1 penetrates the hole 54a of the box 54. An inward / outward hole 5a2 is provided at the tip of the downwardly bent portion 5a1.
The spring pin 5a3 is inserted into the spring 2. Although the spring pin 5a3 is a known one, as shown in FIG. 8, both ends of a one-turn spring are inserted into the holes at the ends of the pin body of the pin 5a3. The biasing force of the spring always tries to rotate in the upward direction of the X2 direction shown in the figure due to the restraint in the hole. Therefore, if the spring is rotated downward to open and the pin body is inserted into the hole 5a2, and when the tip of the pin body projects outward, if the hand is released, the spring wraps around the lower end of the downward bent portion 5a1 and the pin body moves. Press on the lower surface of the tip of. That is, the hole 54a of the box 54 of the downward bent portion 5a1
Is prevented from spontaneously leaving. That is, the handrail part 5a
Is fixed to the box 54. The removal of the handrail part 5a from the box 54 is the reverse of the above procedure. That is, handrail part 5
a can be opened and closed.

According to the handrail portion 5a, the following operational effects can be obtained. When the occupant 8 lifts the handrail part 5a to the upper side X1 when the crane 7 is slung on the work floor 4, the original placement area of the handrail part 5a becomes empty. Therefore, even if the suspended load is lowered and the crane 7 is swung, the suspended load does not collide with the handrail portion 5a, and the suspended load is placed on the work floor 4a.
It can be slid close to the upper surface of, for example, 10 to 20 cm above, and gently lowered onto a predetermined position of the work floor 4. That is, it is possible to prevent the work floor 4 from swinging at a high place, and it is possible to further enhance the safety action by slinging. That is, it is not necessary to lift the suspended load to above the handrail 5, and the safety action can be enhanced only by this effect (advantage). Moreover, lowering the suspended load means shortening the total length of the crane 7. In other words, it is not necessary to make the crane 7 a complicated telescopic type, and the rigidity of the crane 7 can be reduced. That is, even if the weight of the crane 7 is reduced, there is no hindrance to slinging. That is, it is sufficient to reduce the weight of the crane 7, and by doing so, there is a large margin in the allowable load of the boom 3 due to the weight reduction, and as a result, the safety conditions for slinging can be enhanced with a margin. Further, since the length of the crane can be shortened, the freedom of movement of the occupant 8 on the narrow work floor 4 is greatly expanded, and the work efficiency is also improved. Further, if the crane 7 is downsized, it can be quickly attached and detached, and slings for heavy objects can be easily performed.

The opening and closing of the handrail part 5a is shown in FIG.
As shown in FIG. 10, a movable type in the vertical direction X3 may be used, and even in that case, the same operational effect as that of the handrail part 5a of the above-mentioned vertical open / close system is produced. That is, as shown in FIG. 9, the handrail 5 is fixedly mounted on the pillars 5b standing on the work floor 4, but as shown in FIG. 10 on each of the facing surfaces of the two pillars 5b. A long groove 5b1 having a V-shaped upper portion is provided. On the other hand, protruding pin portions 5a4 are provided at both ends of the handrail portion 5a. Both protruding pin portions 5a4 are inserted into the long groove 5b1 and are movable in the up-down direction X3 in the long groove 5b1. That is, passenger 8
When the handrail part 5a is lifted upward to exceed the V-shaped forming part and then lowered, the handrail part 5a becomes the original handrail position (original arrangement position). And handrail part 5
In order to fix a to the original handrail position, both columns 5b
Plates 5b2 are provided on each of the facing surfaces, the ends 5b3 of which are pin-connected to the columns 5b so as to be rotatable. The other end 5b4 of the plate 5b2 is fixed to the support column 5b so that the plate 5b2 can be fixed to the support column 5b at the position where the lower surface of the plate 5b2 abuts the upper surface of the handrail site 5a when the handrail site 5a fits in the original handrail position.
It can be bolted freely. That is, the handrail portion 5a is fixed to the original handrail position by this bolt tightened state. This is the "closed position" in the "opening / closing" of the handrail part 5a. Of course, the handrail part 5a is removed from the original handrail position (the above-mentioned "closed position"), and lifted to V.
The state in which the handrail portion 5a is completely opened and closed along the long groove 5b1 beyond the character forming portion is the "open position".
In this "open position", the crane 7 is slung on the work floor 4.

Further, although not shown, the handrail part 5a may be opened and closed by sliding in the left and right directions. Even in such a case, the same working effect as that of the handrail part 5a of the above-mentioned vertical opening / closing system can be obtained.

Furthermore, a handrail portion 5a which is opened and closed in the front-rear direction may be provided only within the upper surface region of the work floor 4 by using a hinge. Even in such a case, the same working effect as that of the handrail part 5a of the above-mentioned vertical opening / closing system can be obtained. still,
For example, a push-pull type door normally used as a passenger entrance to the work floor 4 of the passenger 8 has an opening / closing direction of the work floor 4
When viewed from the inside, the direction is usually inward and outward. However, since the handrail part 5a is opened and closed at a high place and an extremely high place, the push-pull type door whose opening and closing direction is inward and outward when viewed from the work floor 4 cannot be adopted for safety work. On the other hand, the "handrail part 5a that opens and closes in the front-rear direction only in the upper surface area of the work floor 4 using the hinge" is a push-pull type, but the push-pull range is within the upper surface area of the work floor 4. Safety work can be secured because it is performed only in.

Although not shown, other embodiments will be enumerated below. In addition, the element code in each embodiment borrows the code already mentioned.

(1) In the second embodiment, a part of the handrail 5 is openable and closable, and a part of the handrail 5 is used as an occupant entrance to the work floor 4 so that the crane 7 can be swung freely. When it is arranged on the upper side, the doorway turns Y of the crane 7.
The crane 7 may be arranged so that the suspended load can pass through the entrance and exit located on the suspended load path according to.

The second embodiment is as follows. The work floor 4 is usually provided with a passenger entrance for the passenger 8.
And in this case, the doorway is the above-mentioned "opening and closing direction is the work floor 4
It may be a push-pull type door that is inward and outward when viewed from above, but the "handrail part 5a in which a part of the handrail 5 is openable / closable" having the same configuration as that of the first embodiment serves as a passenger entrance / exit. It is possible that In this case, if the passenger entrance / exit serving as the handrail part 5a is provided on the turning track Y of the crane as it is, the same effect as that of the first embodiment can be obtained. Therefore, the second embodiment is configured in this way.

(2) In the third embodiment, when a part of the handrail 5 is openable / closable and this part is used as a passenger entrance / exit to the work floor 4, the crane 7 and the other part of the handrail 5 are provided. You may provide the part which can be opened and closed in the range which the hanging load of can pass.
The "other part of the handrail 5" corresponds to the "handrail part 5a" in the first embodiment. However, there are no restrictions on the location and the number of locations.

The passenger entrance / exit of the third embodiment is also the same as the passenger entrance / exit of the second embodiment. The third embodiment is different from the second embodiment when the crane 7 is not provided on the work floor 4, or even when the crane 7 is provided on the work floor 4, this crane is not used or This is an example when there are circumstances in which it cannot be used. This is as described in the section "Problems to be solved by the invention" above.
It is applicable to aerial work vehicles without a crane. Furthermore, although originally equipped with a crane,
Since the suspended load is heavy, it can be applied to aerial work vehicles in which the crane must be removed for work. Furthermore, there are cases, for example, in which the article to be hung on the ground can be collected only far from the hanging position of the hook of the crane mounted on the working floor 4, and therefore the crane mounted on the working floor 4 cannot sling. However, according to this 3rd structure, the suspended load is used using the other crane arrange | positioned in the vicinity of such an aerial work vehicle.
In addition, it becomes possible to sling with the same effect as the first and second embodiments. Of course, since the "other part of the handrail 5", that is, the part corresponding to the "handrail part 5a" in the first embodiment, is not limited in the place and the number of places as described above, work at high places There is also a remarkable effect that the degree of freedom in the placement of the other cranes disposed near the vehicle is increased.

(3) In the second and third embodiments, when the size of the suspended load slung on the work floor 4 is known in advance, or according to the specifications of the work floor 4, the suspension load is determined. When the size of the load is known in advance, and when the size of each of these loads is larger than the opening size of the passenger entrance to the work floor 4, or when the size of the load that has been commonly used in special work is reduced. When the size is larger than the opening size of the passenger entrance to the work floor 4 or the like, a mechanism for changing the opening size of the passenger entrance may be provided in the passenger entrance. In this way, the passenger entrance / exit can be used as a passage for a large-sized suspended load, so that the slinging efficiency is increased.

[Brief description of drawings]

FIG. 1 is a side view of an aerial work vehicle applicable to ultra-high work according to an embodiment.

2 is a plan view of the work floor of FIG. 1. FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a partial perspective view of the work floor of FIG.

5 is a partially enlarged view of the handrail part of FIG. 4 and its periphery.

FIG. 6 is a perspective view of a hinge portion.

FIG. 7 is a perspective view of a box body in which an end of the handrail portion on the side opposite to the hinge can be fixed.

FIG. 8 is a view in which a spring pin is inserted into a hole at an end of the handrail part on the side opposite to the hinge.

FIG. 9 is a perspective view of a handrail part side work floor showing another example of the handrail part.

FIG. 10 is a diagram showing long grooves of the column of FIG. 9;

[Explanation of symbols]

1: Lower traveling body, 2: Upper swing body, 3: Boom, 4: Work floor, 5: Handrail, 6: Working tool (drilling machine), 7: Crane, 8: Passenger, X: Ups and downs, Y : Turning, Z: Winding up and down.

Claims (3)

[Claims] 1. In an aerial work vehicle having a work floor (4) equipped with a handrail (5) on the outer periphery at the end of a boom (3) that can be undulated and retracted, a swingable crane (7) is used as the work floor. (4) When placed on top, the part (5a) of the handrail (5) that hits the route of the suspended load by the turning (Y) of the crane (7) can be opened and closed freely within the range where the suspended load can pass. And aerial work vehicles. 2. In an aerial work vehicle having a work floor (4) equipped with a handrail (5) on the outer periphery at the end of a boom (3) which can be undulated and retracted, part of the handrail (5) is opened and closed. When a freely rotatable crane (7) is arranged on the work floor (4) when a part of this is used as a passenger entrance to the work floor (4), the said entrance and exit are An aerial work vehicle in which the crane (7) is arranged so that the suspended load can pass through the entrance and exit located in the suspended load path by turning (Y) of 7). 3. In an aerial work vehicle having a work floor (4) provided with a handrail (5) on the outer periphery at the tip of a boom (3) which can be undulated and extended, part of the handrail (5) is opened and closed. When part of this is used as a passenger entrance / exit to the work floor (4), the other part of the handrail (5) can be opened / closed within the range where the suspended load of the crane (7) can pass. An aerial work vehicle characterized by being equipped with.