JPH101296A - Cable handling device of high altitude working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely hold apart the folded back parts of a cable using simple constitution and to facilitate inspection, maintenance, and replacement work, etc. SOLUTION: This device includes a middle boom 19 and an inner boom 20 which can be telescopically expanded and contracted as they are connected together inside an outer boom 18 that performs derrick operation, and a working table and a control board which are mounted on the end of the inner boom 20 in such a way that they can be held in certain positions by tilting action. A plurality of cables, such as hydraulic cables 76, 77 for the tilting action of the working table and the control board and a power cable 78 for power and signal transmission, are handled around the outer surface of the outer boom 18. A truck 54 that can move back and forth on the outer surface of the outer boom 18 along the longitudinal direction of the outer boom 18 via guide rails 52, 53 is provided. A drum 74 having a plurality of cable guide grooves is mounted on the truck 54. A wire device 81 is provided for moving the truck 54 in synchronization with the expansion and contraction of the middle boom 19 and in the opposite direction to the expanding and contracting direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work vehicle for supporting a worker at a high place with a boom from above the ground when constructing a high place such as an upper floor of a building, an upper part of a pillar, or an overhead line or an elevated road. The present invention relates to an improvement in a cable management device in which a plurality of cables to an operation panel or the like are routed from an outer surface side of the boom to an inner side of the boom via a bent portion in a case where the operator operates the operation panel at a boom tip side. .

[0002]

2. Description of the Related Art Conventionally, as an aerial work vehicle of this type, a movable boom is provided with an outer boom that moves up and down, and a boom that can be telescopically expanded and contracted by sequentially connecting a middle boom and an outer boom within the outer boom. In many cases, the boom is provided with a workbench for mounting a worker and an operation panel at the end of the boom. In such an aerial work vehicle, a tilt operation mechanism using a hydraulic cylinder is provided at the end of the boom in order to hold the floor of the worktable at the end of the boom, the surface of the operation panel, and the like in a constant horizontal position. . Accordingly, the operator can operate the operation panel by himself at the tip end side of the boom in a stable state to perform the raising / lowering operation and the expansion / contraction operation of the boom.

Incidentally, a hydraulic cable is required to supply hydraulic pressure to the hydraulic cylinder of the tilt operation mechanism. In addition, the operation panel requires an electric cable or the like for transmitting power and signals. It is desirable that the plurality of cables such as the hydraulic cable and the electric cable be arranged so as not to obstruct the movement of the vehicle body or the work at a high place. Therefore, the cable is usually guided along the boom from the vehicle body side to the base end of the boom, and further from the base end to the tip end of the boom.

In addition, the cable needs to have a sufficient length to cope with both the state of maximum extension and the state of minimum contraction of the boom.
To accommodate this play length, the cable must be bent midway in an arrangement along the boom. In addition, the cable must be supported in such a state that no excessive sag or the like occurs at the bent portion. For this reason, in the related art, a plurality of, for example, three cables are arranged side by side in parallel and parallel to each other, and guided along the outer surface of the outer boom from the base end side to the distal end side of the outer boom, and then, It is bent once on the way and returned to the base end side of the outer boom, from which it is introduced into the middle boom and the outer boom and extended to the tip of the inner boom. In this case, it is necessary to prevent the cables from being rubbed or entangled in the overlapping arrangement portion that is folded back from the bending point of the cable.

Therefore, conventionally, a cable carrier is generally used. In other words, the cable on the introduction side is supported at a position separated from the outer surface of the outer boom while being held in the cable carrier, and the cable portion on the return side from the turning point is held on the outer surface of the outer boom while being held in the cable carrier. Are supported in an arrangement that overlaps with the inside of the outer cable so as to be in contact with the outer cable. In this case, as a means for holding the superposed cable bears and the cable portions at positions separated from each other, there is provided a holder for supporting the portion of the cable carrier on the introduction side at a position separated from the outer boom, and the holder is provided with the cable on the return side. It is provided so as to cover the periphery of the bear.

[0006]

The above-mentioned cable of the aerial work vehicle is inspected as necessary or periodically for ensuring safety, and is repaired or replaced in some cases. However, in the case of the conventional configuration using the above-described cable carrier, the cable must be removed from the cable carrier for work such as inspection, repair, and replacement. In this case, the cable carrier on the return side is disposed in a state covered by the lower side of the holder. It is necessary to take out the cable from the cable carrier on the return side, which is arranged in the area, while avoiding them. Therefore, this work requires a great deal of labor, is also troublesome and inefficient, and places an extra burden on workers, and requires a long time for the work, resulting in problems in terms of workability and cost. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it is possible to reliably maintain a folded portion of a cable with a simple configuration and to easily perform inspection, maintenance, replacement, and other operations. It is an object of the present invention to provide a cable routing device for a work vehicle.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a movable vehicle body, an outer boom provided on the vehicle body for raising and lowering, and an outer boom in the outer boom are sequentially arranged. A middle boom and an inner boom that can be connected and telescopically extended and contracted, and a workbench and an operation panel for a worker mounted attached to a tip of the inner boom so as to maintain a fixed posture by a tilt operation, In aerial work vehicles where multiple cables such as hydraulic cables for tilting operation of the table and operation panel and electric cables for power and signal transmission are routed on the outer surface side of the outer boom,
A bogie that can reciprocate along the length of the outer boom via the guide rails on the outer surface side of the outer boom is provided.A drum with a plurality of cable guide grooves is attached to this bogie, and the bogie is synchronized with the telescopic operation of the middle boom. A wire device is provided to move the cable to the side opposite to the direction of expansion and contraction, and the plurality of cables are collectively guided along the outer surface of the outer boom from the base end side to the distal end side of the outer boom. Around the cable guide groove of the truck drum,
After returning the wound cable once to the base end side of the outer boom, it is further introduced into the inner boom from the base end side to the tip end side. provide. According to the second aspect of the present invention, a movable vehicle body, an outer boom provided on the vehicle body for raising and lowering, a middle boom and an inner boom sequentially connected within the outer boom and capable of telescopic expansion and contraction, and an inner boom A workbench and an operation panel for mounting the worker, which are attached to the tip of the work so as to be able to maintain a constant posture by a tilt operation, a hydraulic cable for tilting the worktable and the operation panel, and a power cable for power / signal transmission. In an aerial work vehicle in which a plurality of cables such as electric cables are routed on the outer surface of the outer boom, a bogie that can reciprocate along the longitudinal direction of the outer boom via a guide rail on the outer surface of the outer boom is provided. To the drum with multiple cable guide grooves, and move the bogie in the direction opposite to the direction of extension and contraction in synchronization with the extension and retraction of the middle boom The outer boom is provided with a wire device, and a drum having a plurality of cable guide grooves is also mounted on the base end side of the outer boom, and the plurality of cables are collectively connected to the outer surface of the outer boom from the base end side to the distal end side of the outer boom. Then, the cable is wound around each cable guide groove of the bogie drum, and the wound cable is returned to the base end side of the outer boom once, and each cable guide groove of the drum at the base end side of the outer boom is wound. The cable routing device for an aerial work vehicle, characterized in that the cable routing device is further introduced into the inner boom from the base end side toward the distal end side.

According to a third aspect of the present invention, in the cable routing device for an aerial work vehicle according to the second aspect, the wire device for moving the bogie has one end fixed to the middle boom and the other end connected to the base of the outer boom. After being wound around a pulley provided on the end side, it is guided to the outer surface side of the outer boom and connected to the bogie when the boom is extended, and one end is fixed to the middle boom and the other end is connected to the outer boom. Having a boom retracting movement wire which is guided around the outer surface of the outer boom after being wound around a pulley provided on the tip side and connected at the same height as the drum axis of the bogie. Provide a cable routing device for work vehicles.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a cable routing device for an aerial work vehicle according to the present invention.

FIG. 1 is a perspective view showing the overall construction of the aerial work vehicle according to the present embodiment. As shown in FIG. 1, the aerial work vehicle includes a movable body 11.
Reference numeral 1 denotes a configuration in which caterpillar wheels 13 and 14 are provided at lower portions on both sides of a vehicle body 12 which is relatively short and has no driver's seat. The vehicle body 11 can operate the wheels 13 and 14 by an operation on an operation panel described later, and can freely move forward and backward, stop, turn left and right at the time of running and at a stop position, and the like. A pair of left and right brackets 15 are provided upward at a central portion of the vehicle body 11, and one end (base end) of a boom 17 is rotatable up and down via a horizontal shaft 16. The other end (tip) of the boom 17 can be raised and lowered. The boom 17 includes three booms, that is, a box column-shaped outer boom 18 having a rectangular cross section and open at both ends in the longitudinal direction, and a boom 17 which is inserted into the outer boom 18 and can be protruded and retracted at the tip end thereof. It comprises a boom 19 and an inner boom 20 of the same shape which can be inserted into the middle boom 19 and protrude and retract at the distal end thereof, and these can be telescopically extended and contracted by a mechanism described later. The base end of the outer boom 18 is connected to the shaft 16 of the vehicle body 12.

A hydraulic cylinder 21 which can swing up and down is provided at a center position of the vehicle body 12, and the hydraulic cylinder 21 is connected to the middle part or the tip side of the outer boom 18. The raising operation is performed by the driving force. At the tip of the boom 20 of the boom 17 which can be raised and lowered in this way,
A worktable 22 on which an operator can board is connected. The workbench 22 has a handrail frame 2 around a square work floor 23.
4, so that the worker can safely board and work. In addition, a small support frame 25 is set up at a connection portion between the work table 22 and the inner boom 20,
An operation panel 26 is fixedly installed inside the support frame 25. An operation unit such as a switch button and an indicator lamp for various operations is provided on the surface of the operation panel 26. When an operator boarding the operation table 22 operates the operation unit of the operation panel 26, Operation, the raising / lowering operation of the boom 17 by the hydraulic cylinder 21, and the boom 17 by a mechanism described later.
, Etc. can be performed. The boom 17 can be raised and lowered at a wide range of angles from a horizontal or lower state to a slightly vertical state, and a connecting portion between the tip of the inner boom 20 and the worktable 22 is not shown. A tilt mechanism is provided. The tilt mechanism tilts the work table 22 by a control mechanism built in the operation panel 26 such that the work floor 23 of the work table 22 and the bottom surface of the operation panel 26 are always in a horizontal state according to the elevation angle of the boom 17. It is to let.

FIG. 2 shows the vertical cross-sectional structure of the boom 17 from the side along the longitudinal direction, and also shows the overall configuration of a drive mechanism for telescopic operation of the boom 17 and a cable routing device. FIG. 3 shows a state in which the longitudinal cross-sectional structure of the boom is viewed from the axial direction, and a partial configuration of the cable routing device. As shown in FIGS. 2 and 3, the outer boom 18, the middle boom 19, and the inner boom 20 constituting the boom 17 have similar rectangular cross-sectional shapes having different heights and widths, and have slightly the same length. From the maximum contraction state to the maximum extension state of the boom 17, the length changes about three times. In addition, between the outer boom 17 and the middle boom 18, and between the middle boom 18 and the outer boom 19, there are provided support rollers for smoothly performing the respective expansion and contraction operations. Omitted for

As shown in FIG. 2, the telescopic drive mechanism 31 of the boom 17 has an outer boom 1 which is a basic operation.
It comprises a hydraulic cylinder 32 for performing an extension / contraction operation between 8 and the middle boom 19, and a wire device 33 for performing an extension / contraction operation between the middle boom 19 and the inner boom 20 as an accompanying operation. The hydraulic cylinder 32 is arranged at the center position of the boom 17, and the root portion of the hydraulic cylinder 32 is fixed to the base end of the middle boom 19 by a mounting tool 34, and the distal end of the cylinder rod 35 is fixed to the outer boom 18. Is fixed to a base end portion with a connecting tool (not shown). The illustration of the hydraulic path of the hydraulic cylinder 32 is omitted for the same reason as described above. By advancing the cylinder rod 35 of the hydraulic cylinder 32, the middle boom 19 moves to the tip side (the left side in FIG. 2) of the outer boom 18 to perform an extension operation, and the cylinder rod 35 is retracted. Then, the middle boom 19 moves to the base end side (the right side in FIG. 2) of the outer boom 18 to perform the contracting operation.

On the other hand, the wire device 33 is disposed at a lower position of the boom 17, and an extension wire 36 for transmitting the driving force when the middle boom 19 is extended to the inner boom 20.
And a contraction wire 37 for transmitting the driving force at the time of contraction of the middle boom 19 to the inner boom 20. One end of the extension wire 36 is connected to the outer boom 1.
8 is fastened to a first wire support 38 attached to the distal end of the inner boom 20 while the other end is wound around an extension pulley (moving pulley) 39 provided at the distal end of the middle boom 19. It is fastened to the second wire support 40 attached to the base end side. The extension wire 36 having such a configuration.
Since the first wire support 38 attached to the outer boom 18 to which the extension wire 36 is fixed is always in a wire fixed state, the middle boom 19 is actuated by the hydraulic cylinder 32 on the left side of FIG. When the extension pulley 39 moves toward the left side in FIG. 2 when the extension pulley 39 is moved together with the middle boom 19 to the left side in FIG. Wire 3
The tension of 6 acts on the second wire support 40 of the inner boom 20 to which the extension wire 36 is fixed, and the inner boom 20 also moves to the left side in FIG. Things. Since the operation of the inner boom 20 is performed simultaneously with the moving middle boom 19, the operation amount of the inner boom 20 is twice as large as the middle boom 19 when viewed from the outer boom 18 in the fixed state. An operation, that is, a telescopic extension operation is performed.

The contraction wire 37 has one end thereof.
The outer boom 18 is fastened to a first wire support 38 attached to the distal end side of the outer boom 18, and the other end is connected to a middle boom 19
Is wound around a contraction pulley (moving pulley) 41 provided on the base end side of the inner boom 20 and is fixed to a second wire support 40 attached to the base end side of the inner boom 20. In the contraction wire 37 having such a configuration, the first boom 38 attached to the outer boom 18 to which the contraction wire 37 is fixed is always in a wire fixed state. When the cylinder 32 is contracted toward the right side in FIG. 2 by the action of the cylinder 32, the contraction pulley 4 provided on the middle boom 19 is
When the pulley 41 for contraction moves to the right in FIG. 2 together with the middle boom 19, the tension of the contraction wire 37 secures the contraction wire 37 to the inner boom. Acting on the second wire support 40 of FIG.
Eventually, the inner boom 20 also moves to the right in FIG.
7 is a contraction operation of the whole. Of which boom 20
Is also performed at the same time as the moving middle boom 19, the contraction movement amount of the inner boom 20 is twice as large as that of the middle boom 19 when viewed from the outer boom 18 in a fixed state. A telescopic contraction operation is performed.

Next, the cable routing device 51 is provided with a carriage 54 that can reciprocate along the longitudinal direction of the outer boom 18 via guide rails 52 and 53 on the upper outer surface side of the outer boom 18. . Guide rail 52, 5
Numeral 3 denotes an outer boom which is provided on the upper outer surface side of the outer boom 18 so that the opening portions are opposed to each other on the left and right sides. It is provided. The bogie 54 has wheels inserted into the guide rails 52 and 53 and moves along the longitudinal direction of the outer boom 18.

FIG. 4 is an enlarged perspective view showing the trolley 54 as viewed from the upper left side of FIG. 2, and FIG. 5 is an enlarged plan view of the trolley 54 viewed from above in FIG. FIG. As shown in FIGS. 4 and 5, the carriage 54 has a carriage main body 55 having a U-shaped vertical shape and a cross-sectional shape in which the opening is directed upward and both side walls having a convex shape. The front part of the bogie main body 55 (the bogie main body 5 shown in FIG. 2)
The left and right wheels (front wheels) 58, 59 are attached to these axles 56, 57, respectively. Also, left and right axles 60 and 61 are provided so as to protrude to the side of the rear part of the bogie main body 55 (the right part of the bogie main body 55 shown in FIG. 2 is a rear part), and these axles 58 and 59 are provided.
Left and right wheels (rear wheels) 62 and 63 are attached to the vehicle. The left and right front wheels 58 and 59 and the left and right rear wheels 62 and 63 are sandwiched between upper and lower wall portions of the left and right guide rails 52 and 53, respectively, so that the guide rails 52 and 53 are provided.
Is inserted inside. Therefore, the front wheels 58, 59 and the rear wheels 62, 63 are basically held up and down by the upper and lower wall portions of the guide rails 52 and 53, so that the bogie 54 does not swing greatly up and down, that is, On the surface of the boom 18, stable running can be performed along the longitudinal direction.

Next, a drum 74 for cable management is attached to the carriage 54. That is, a drum shaft 75 for supporting the drum is horizontally inserted laterally into a portion of the bogie main body 55 projecting above the left and right convex side walls, and the drum 4 is rotatable around the drum shaft 75. Supported. A plurality, for example, 3
Cable guide grooves 71, 72 for winding a book cable,
73 are formed adjacent to and parallel to each other. Cable guide grooves 71, 72, 7 formed in the drum 74
Of the three, those 71 and 73 on both sides have a large diameter and are wound around large diameter hydraulic cables 76 and 77 for guiding. The cable guide groove 72 at the intermediate position has a small diameter and guides the small-diameter electric cable 78. The detailed arrangement of the hydraulic cables 76, 77 and the electric cable 78 wound around the guide grooves 71, 72, 73 will be described later with reference to FIGS.

As shown in FIG. 2, the bogie 54 is moved by a bogie driving wire device 81 in a direction opposite to the telescopic direction in synchronization with the telescopic operation of the middle boom 19. When the boom 17 extends, the wire device 81 moves the carriage 54 in the proximal direction of the outer boom 18 (FIG. 2).
To the right side (backward of the bogie): the boom extension movement wire 82 that moves toward the “boom extension movement direction”, and the bogie 54 when the boom 17 contracts. (The leftward direction in FIG. 2 (the front of the bogie): hereinafter referred to as the “boom contraction movement direction”).

The former boom extension movement wire 82
4 and 5, one end thereof is passed through a hole 84 provided in the rear end edge of the bottom wall of the bogie main body 55, and is then stopped by a fastening device 85 (hereinafter, this fastening portion will be referred to as a fastening portion). The other end is wound around a boom extension movement pulley (constant pulley) 86 provided on the base end side of the outer boom 18 and attached to the base end side of the middle boom 19 together with the bogie rear fastening portion. It is fixed to the wire support 87 which has been mounted. In the boom extension movement wire 82 having such a configuration, the boom extension movement pulley 86 that is wound around an intermediate portion of the boom extension movement wire 82 is always in a fixed position. When the middle boom 19 is extended toward the left side of FIG.
9 is pulled in the same direction by the portion of the wire support 87 provided on the base end side, and tension is generated. Then, when the wire support 87 moves to the left side in FIG.
2 acts on the rear fastening portion of the vehicle body, which secures the boom extension movement wire 82, via the boom extension movement pulley 86, whereby the bogie 54 moves rearward of the bogie, that is, on the right side of FIG. It moves in the direction of the boom to move toward the boom. The operation of the carriage 54 in the movement direction when the boom is extended is performed in a state where the carriage 54 is connected to the boom 19 while being moved by the constant pulley, so that the outer boom 18 in the fixed state is moved.
When viewed from above, the amount of movement of the middle boom 19 is substantially the same. In other words, it is １ ／ of the inner boom 20 that performs the double speed operation.
At this speed, the carriage 54 moves in the moving direction at the time of extension.

As shown in FIGS. 4 and 5, one end of the boom retracting movement wire 83 is connected to an outwardly projecting portion of a drum shaft 75 provided at an upper portion of a center portion of the side wall of the bogie main body 55. It is connected via a hook 88. This hook 88 joins two bent plates and opens one end,
The other end has a Y-shaped configuration viewed from a closed plane, and one open end is disposed outside the center position of the side wall of the bogie main body 55. A shaft end protruding outward from the drum shaft 75 is inserted into a hole drilled at the center of the open end of the hook 88 at the plate width direction, and is hooked. That is, the hook 88 is attached to the carriage 54 at the same height as the axis of the cable winding drum 74. A hole 89 is formed at the closed other end of the hook 88, and one end of the movement wire 83 at the time of boom contraction is passed through the hole 89, and then fastened by a fastener 90. Also, the other end of the boom retracting movement wire 83 is
After being wound around a moving pulley (constant pulley) 91 provided at the distal end side of the outer boom 18 during contraction of the boom, it is guided into the outer boom 18 and is connected to a wire support 87 attached to the base end side of the middle boom 19. It is fixed. In the boom contraction movement wire 83 having such a configuration, the boom contraction movement pulley 91 which is wound around an intermediate portion of the boom contraction movement wire 83 is always in a fixed position. When the middle boom 19 contracts to the right in FIG. 2 by the action of the hydraulic cylinder 32, the middle boom 19 is pulled to the right in FIG. 2 by the wire support 87 provided on the base end side of the middle boom 19. Generates tension.

Then, the wire support 87 is attached to the middle boom 1.
In the case of the boom operation to move to the right side of FIG.
The tension of the boom contraction movement wire 83 is changed in direction by the boom contraction movement wire pulley 91, and a pulling force acts on the bogie 54 to which one end of the boom contraction movement wire 83 is fastened. As a result, the carriage 54 moves forward, that is, toward the left side in FIG. The movement of the bogie 54 in the moving direction when the boom is contracted is performed in a state where the bogie 19 is connected to the middle boom 19 by a constant pulley, so that the movement amount of the inner boom 20 when viewed from the outer boom 18 in the fixed state. Is substantially equivalent to
That is, the carriage 54 moves in the contracting movement direction at half the speed of the inner boom 20 that operates at the double speed. One end of the boom contraction movement wire 83 is connected to the center position of the cable winding drum 74 of the bogie main body 55 via a hook 88, and the boom contraction movement wire 8 is connected.
No extra bending moment is generated in the bogie main body 55 because the cable winding 3 pulls the center position by winding the cable. As a result, no extra torque is generated on the truck 54.

Next, the cable routing structure will be described. In FIG. 2 used in the above description, the cables 78, 7
9 and 80 are shown as a whole, and FIGS. 4 and 5 show a portion where the cables 78, 79 and 80 are wound around the drum of the carriage 54.

FIG. 6 is a side view showing a portion where the cables 78, 79, and 80 are routed on the base end side of the boom 17, and FIG. 7 is a perspective view specifically showing a part (upper portion) of the configuration shown in FIG. FIG. As shown in FIGS. 6 and 7, the upper corner of the base end of the outer boom 19 has a slightly Y-shaped frame 1 when viewed from the side and a slightly U-shaped frame when viewed from the plane.
01 is attached so as to protrude outward from the base end of the boom 18.
A pair of drums for winding a cable at different height positions in two portions, that is, an upper drum 10 and a lower drum 1
04 is supported by drum shafts 99 and 100, respectively.

Similar to the drum 74 provided on the cart, the upper drum 103 has cable guide grooves 105, 106, and 107 for winding three cables adjacent to and parallel to each other. Of the cable guide grooves 105, 106, 107 formed in the upper drum 103, both sides 105, 107 have a large diameter, and wind and guide the large-diameter hydraulic cables 76, 77. The cable guide groove 106 at the intermediate position has a small diameter and guides the small-diameter electric cable 78.
Each cable guide groove 105 of this upper drum 103, 1
Introduced portions of the cables 76, 77, 78 guided from the vehicle body 11 side to the boom 17 side are wound around 06, 107. That is, each cable 7 guided to the boom 17 side
6, 77 and 78 are first wound around the respective cable guide grooves 105, 106 and 107 of the upper drum 103, and then the cable guide grooves 71 and 7 of the drum 74 of the carriage 54.
It is guided to the upper side of 2, 73 and wound down. Note that the horizontal portion 108 of the Y-shaped frame 101
A cable holder 109 is provided at the end of the cable holder.
The cable holder 109 has a flat stopper plate 110.
And a bolt 111 for fixing the stopper plate 110 to the frame 101. After passing the cables 76, 77, 78 between the stopper plate 110 and the frame 101, the bolt 111 is tightened. 76, 77, 78 are sandwiched and fixed between the stopper plate 110 and the frame 101.

The lower drum 104 also has an upper drum 1
Similarly to 03, cable guide grooves 112, 113, and 114 for winding three cables are formed adjacent to and parallel to each other. Of the cable guide grooves 112, 113, and 114 formed in the lower drum 104, both sides 112 and 113 have large diameters, and wind and guide the large-diameter hydraulic cables 76 and 77. . The cable guide groove 113 at the intermediate position has a small diameter and guides the small-diameter electric cable 78.
Each cable guide groove 112, 1
The cables 76, 77, 78 wound around the lower side of the drum 74 of the trolley 54 are guided to the base end side of the outer boom 18 and wound around 13, 114. That is, each cable 76, 77, 78 guided to the drum 74 of the carriage 54
First, each cable guide groove 105 of the upper drum 103, 1
06, 107, the drum 74 of the carriage 54
Are guided to the upper side of the cable guide grooves 71, 72, 73 and wound down, then extended in the return direction and wound around the lower drum 104. After the cables 76, 77, 78 are wound from the upper side to the lower side in the lower drum 104, the cables 76, 77, 78 are introduced into the inner boom 20 from the base end to the distal end, and the distal end of the inner boom 20 is It is connected to an operation panel 26 and a tilt mechanism provided on the side. Note that a cable fastener 115 is provided in the base end portion of the inner boom 20.
5 temporarily fixes the middle portions of the cables 76, 77, 78.

Next, the operation of the cable routing device for an aerial vehicle constructed as described above according to the present embodiment will be described. The operation of raising and lowering the boom 17 at the time of working at a high place is not particularly different from the conventional method, and thus the description thereof is omitted.

In the present embodiment, as described above, the boom 17 including the outer boom 18, the middle boom 19, and the inner boom 20 is telescopically extended and contracted. Is moved in a direction opposite to the direction of expansion and contraction in synchronism with the expansion and contraction operation of the middle boom 19 by the wire device 81. Therefore, as shown in FIG. 2, when the middle boom 19 is fully contracted, the entire boom is also fully contracted. In this state, the bogie 54 is located at the tip end side of the outer boom 18 at maximum. It has become. When the operation in the extension direction of the boom 17 is performed from this state, the middle boom 19 moves toward the distal end (in the direction of the arrow A) with respect to the outer boom 18 in the fixed state, and the inner boom 20 further moves at a double speed toward the distal end ( (In the direction of arrow A). At this time, middle boom 1
The bogie 54 is pulled backward (in the direction of arrow B) by the boom extension movement pulley 86 by the boom extension movement wire 82 of the bogie drive wire device 81 fixed to 9. The speed of the middle boom 19 is the same as the speed of the middle boom 19 because the pulley 86 for movement at the time of boom extension is a constant pulley. At this time, the movement wire 83 at the time of boom contraction is loosened, so that the movement of the carriage 54 is allowed.

On the other hand, the cables 76, 77, 78 are fixed by the cable holder 109 on the base end side of the outer boom 18, and the upper drum 103, the drum 74 of the carriage 54,
After being wound in the order of the lower drum 103, the inner boom 20
Are fixed by a cable fastening tool 115 in the base end of the cable.
Therefore, the cables 76, 77, 78 are pulled at the speed of the inner boom 20 moving at double speed. However, since the drum 74 of the carriage 54 moves in a dynamic pulley manner, 54 is 1/1 of the cable travel
2, that is, the drum 74 receives a pulling action at the same speed as the moving speed of the middle boom 19. Therefore,
Since the pulling speed of the cart 54 from the cables 76, 77, 78 and the pulling speed of the boom extension movement wire 82 match, the truck 54 moves smoothly. When the bogie 54 moves during boom extension, the direction of action of the pulling force received by the bogie 54 from the cables 76, 77, 78 and the pulling force received from the boom extending movement wire 82 match (arrow B). Direction), even if the winding position of the cables 76, 77, 78 with respect to the carriage 54 and the wire fastening position are shifted up and down the carriage 54, the directions of the generated moments also match.
In particular, no vertical swing occurs. Therefore, the carriage 54
Wheels 58, 59, 62, 63 and guide rails 52, 5
There is no backlash between No.3 and No.3.

Next, the operation of the boom 17 in the contracting direction will be described. When the boom 17 contracts, the middle boom 19 moves toward the base end (in the direction of the arrow B) with respect to the outer boom 18 in the fixed state, and the inner boom 20 further moves in the same direction at a double speed (the direction of the arrow B). Go to). At this time, the bogie 54 is pulled forward (in the direction of the arrow A) by the boom retracting movement wire 83 of the bogie driving wire device 81 fixed to the middle boom 19 via the boom retracting pulley 91. However, the speed of the carriage 54 is the same as the speed of the middle boom 19 because the moving pulley 91 during boom contraction is a constant pulley. At this time, the movement wire 82 at the time of extension of the boom is in a loosened state.
Will be allowed to move.

On the other hand, the cables 76, 77, and 78 are wound in the order of the upper drum 103, the bogie drum 74, and the lower drum 104 while being fixed by the cable holder 109 at the base end of the outer boom 18. Thereafter, the inner boom 20 is stopped by a cable fastener 115 in the base end portion. Then, the cables 76, 77 and 78 are loosened at the speed of the inner boom 20 which moves at double speed. However, since the drum 74 of the carriage 54 moves in a dynamic pulley manner, the moving pulley The trolley 54 serving as a support portion exerts a loosening action on the drum at half the cable travel distance, that is, at the same speed as the moving speed of the middle boom 19. Therefore,
Since the slack speed of the cables 76, 77, 78 with respect to the carriage 54 matches the pulling speed received from the boom contraction movement wire 83, the carriage 54 also moves smoothly in this case.

When the carriage 54 moves during the boom contraction, the cables 76, 77, and 78 are loosened to the carriage 54, but a certain amount of tensile force remains. is there. Since the direction of the pulling force received by the carriage 54 from the movement wire 83 during boom contraction (direction of arrow B) and the direction of the pulling force received from the cables 76, 77, 78 (direction of arrow A) are opposite directions,
If the points of action of the two tensile forces are different, a rotational force will be generated on the bogie 54 due to the difference in moment. However, in the present embodiment, the center position of the winding position of the cables 76, 77, 78 and the fastening position of the boom contraction movement wire 83 match on the bogie 54, so the moment is canceled. State. Therefore, even when the boom is contracted, the bogie 54 does not particularly swing up and down.
Therefore, there is no backlash between the wheels 58, 59, 62, 63 of the truck 54 and the guide rails 52, 53.

As described above, in the cable routing apparatus 51 of the present embodiment, the cables 76, 77, 78 can smoothly and surely absorb the extra length following the expansion and contraction of the boom 17. And the configuration is relatively simple.

Under such a configuration, the cables 76, 77 and 78 are provided in a state of being exposed to the outside, and there is no extra covering. Therefore, regular inspection,
In the case of repair, replacement, etc., there is no need to work while removing coverings such as conventional cable carriers and their holders when they exist, so inspection, maintenance, replacement, etc. The above-mentioned operation can be performed easily, and a very great convenience can be obtained.

[0036]

As described above in detail, according to the cable routing apparatus for an aerial work vehicle according to the present invention, a movable vehicle body, an outer boom provided on the vehicle body for raising and lowering, and the outer boom A middle boom and an inner boom that are sequentially connected to each other within the telescopic shape and a workbench and an operation panel for mounting a worker that are attached to a tip of the inner boom so as to be able to hold a fixed posture by a tilt operation. In the aerial work vehicle where multiple cables such as hydraulic cables for tilt operation of the workbench and operation panel and electric cables for power and signal transmission are routed on the outer side of the outer boom, When a truck that can reciprocate along the longitudinal direction of the outer boom is provided via a guide rail, and a drum having a plurality of cable guide grooves is attached to this truck, A wire device for moving the bogie in a direction opposite to the direction of extension and contraction of the bogie in synchronization with the extension and retraction of the middle boom, and the plurality of cables are collectively connected to the outer boom from the base end to the tip end of the outer boom. After guiding along the outer surface of the bogie, the cable is wound around each cable guide groove of the bogie drum, and the wound cable is once returned to the base end side of the outer boom and then further into the inner boom. Introducing the cable from the front end to the end allows the folded-back portion of the cable to be securely separated and held with a simple configuration, and is extremely simple in configuration compared to the conventional configuration using a cable carrier. In the case of inspection, repair, replacement, etc., complicated work such as removing the cable from the cable carrier can be eliminated, and inspection, maintenance, replacement, etc. The in which excellent effects such as easily be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a high-altitude working vehicle according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing the entire configuration of a cable routing device for an aerial work vehicle according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a configuration of a part of a cable routing device for an aerial work vehicle according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a part of a cable routing device for an aerial work vehicle according to an embodiment of the present invention.

FIG. 5 is an enlarged plan view of FIG. 2;

FIG. 6 is a side view showing a cable routing portion on the base end side of the boom of the cable routing device shown in FIG. 2;

7 is a perspective view specifically showing a part (upper part) of the configuration shown in FIG. 6;

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 vehicle body 17 boom 18 outer boom 19 middle boom 20 inner boom 22 work table 26 operation panel 31 drive mechanism for telescopic 32 hydraulic cylinder 51 cable routing device 52 guide rail 53 guide rail 54 trolley 74 drum 76 hydraulic cable 77 hydraulic cable 78 electric wire Cable 81 Bogie drive wire device 82 Boom extension drive wire 83 Boom contraction drive wire 85 Fastener 86 Boom extension travel pulley 87 Wire support 88 Drag fastener 90 Stopper 91 Boom retract travel pulley 101 Frame 103 Upper drum 104 Lower drum

Claims (3)

[Claims] 1. A movable vehicle body, an outer boom provided on the vehicle body for raising and lowering, a middle boom and an inner boom sequentially connected within the outer boom and capable of expanding and contracting in a telescopic manner, and a tip of the inner boom. A workbench and an operation panel for mounting the operator, which are mounted so as to be able to maintain a constant posture by tilting, and a hydraulic cable and an electric cable for transmitting power and signals of the worktable and the operation panel. In a high-altitude work vehicle in which a plurality of cables such as a cable are routed on the outer surface side of the outer boom, a bogie that can reciprocate along the longitudinal direction of the outer boom via a guide rail on the outer surface side of the outer boom is provided. A drum having a cable guide groove of the same type is attached, and the bogie is moved in the direction opposite to the direction of extension and contraction in synchronization with the extension and retraction of the middle boom. After the ear device is provided and the plurality of cables are collectively guided along the outer surface of the outer boom from the base end side to the distal end side of the outer boom, the cables are wound around each cable guide groove of the drum of the bogie. A cable maneuvering device for an aerial work vehicle, wherein the wound cable is once returned to the base end side of the outer boom, and further introduced into the inner boom from the base end side to the tip end side. . 2. A movable vehicle body, an outer boom provided on the vehicle body for raising and lowering, a middle boom and an inner boom sequentially connected within the outer boom and capable of expanding and contracting in a telescopic manner, and a tip of the inner boom. A workbench and an operation panel for mounting the operator, which are mounted so as to be able to maintain a constant posture by tilting, and a hydraulic cable and an electric cable for transmitting power and signals of the worktable and the operation panel. In a high-altitude work vehicle in which a plurality of cables such as a cable are routed on the outer surface side of the outer boom, a bogie that can reciprocate along the longitudinal direction of the outer boom via a guide rail on the outer surface side of the outer boom is provided. A drum having a cable guide groove of the same type is attached, and the bogie is moved in the direction opposite to the direction of extension and contraction in synchronization with the extension and retraction of the middle boom. An ear device is provided, and a drum having a plurality of cable guide grooves is attached also to the base end side of the outer boom, and the plurality of cables are collectively attached to the outer surface of the outer boom from the base end side to the distal end side of the outer boom. After guiding along the cable, wind the cable around each cable guide groove of the bogie drum, return the wound cable once to the base end side of the outer boom, and put it around each cable guide groove of the drum at the base end side of the outer boom. A cable maneuvering device for an aerial work vehicle, which is wound and then further introduced into the inner boom from a base end thereof toward a distal end thereof. 3. The cable routing device for an aerial work vehicle according to claim 2, wherein the wire device for moving the bogie has one end fixed to the middle boom and the other end provided on the base end side of the outer boom. A boom extension movement wire connected to the bogie guided to the outer surface of the outer boom after being wound around the pulley, and one end fixed to the middle boom and the other end provided at the distal end of the outer boom. A cable for aerial work vehicles, comprising: a boom retracting movement wire guided to the outer surface of the outer boom after being wound around the pulley and connected to the same position as the drum axis of the bogie. Handling device.