JPH053500B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to an elevating-type high-altitude working machine equipped with an elevating platform that moves up and down along a telescoping mast. (Prior Art) An elevating type aerial work machine equipped with an elevating platform that moves up and down along a telescoping mast has a base 1 mounted in a substantially upright manner on the base 1, as shown in FIGS. 1 and 2. It consists of a proximal support column 2 and a distal support column 4 that is telescopically engaged with the proximal support column 2 and has a pulley (or sprocket) 3 at its tip. A telescoping mast 6 that is telescopically driven by a telescoping device 5 (here, a hydraulic cylinder) disposed between the two, and a lifting platform 7 that is guided by the telescoping mast 6 and can be moved up and down between the tip and base of the telescoping mast 6. , and is passed around the pulley (or sprocket) 3 at the tip of the distal support column 4, and one end thereof is connected to the proximal support column 2.
Alternatively, it is provided with a rope (or chain) 8 which is fixed to the base 1 and whose other end is fixed to the lifting table 7. In FIG. 1, the base 1 is composed of a swing base 11 that is rotatably mounted on a vehicle 10, and a telescoping arm 12 that is fitted into the swing base 11 so as to be horizontally telescopic. The telescopic mast 6 is attached to the outer end of the telescopic arm 12 of the base 1 by pivotally connecting its base end. 13 is
This is a undulating cylinder interposed between the telescopic arm 12 on the base 1 and the proximal support column 2 on the telescopic mast 6 at appropriate locations. This type of elevating platform can also move the elevating platform 7 between the tip of the telescopic mast 6 in an extended state and the lower end of the telescopic mast 6 by driving the telescopic mast 6 to extend and contract. Therefore, it is used for wall surface work such as painting and repairing ship hull side walls in shipyards, for example. In recent years, in this type of lifting-type aerial work equipment, a second lifting platform has been installed below the lifting platform 7, and this second lifting platform can be driven up and down to improve the efficiency of wall work. A lift-type aerial work machine has been proposed. That is, as shown by the dashed line in FIG. 1, the telescopic mast 6
A winch installed on the second elevating table 9 is guided by a second elevating table 9, which is movable up and down between the distal end and the proximal end of the telescopic mast 6, and is disposed below the elevating table 7. An elevating type work machine has been proposed which is raised and lowered from the tip of a telescopic mast 6. (Problems to be Solved by the Present Invention) However, the second lifting platform 9 is mounted on the second lifting platform 9 by a winch, which is equipped with a wire rope whose end is fixed to the upper end of the telescopic mast 6 as described above. In the case of an elevating type aerial work machine in which winding and unwinding is done by raising and lowering, when the telescopic mast 6 is telescopically driven to raise and lower the elevating platform 7, the second elevating platform 9
, it is not possible to raise and lower the second lifting platform 9 and the lifting platform 7 completely independently, and as a result, the workers who are on the lifting platform 7 and the second lifting platform 9 can move up and down the wall individually. There was a problem that the work efficiency during work was reduced. In addition, the second lifting platform 9
When lifting the second lifting platform 9 by operating a winch installed at There was a risk of being caught. The present invention aims to provide a new lifting type aerial work machine that solves the above-mentioned problems of the conventionally proposed lifting type aerial working machine equipped with a second lifting platform. (Means for Solving the Problems) The lifting type high-altitude working machine of the present invention includes: a base 1; a proximal support 2 attached to the base 1 in a substantially upright manner; and a base support 2 that is extendable and retractable. A telescopic mast 6, which is engaged with a distal column 4 having a pulley (or sprocket) 3 at its tip, and is driven to extend and contract by a telescopic device 5 disposed between the proximal column 2 and the distal column 4; An elevating platform 7 guided by the mast 6 and movable up and down between the distal end and the proximal end of the telescopic mast 6, and a pulley (or sprocket) 3 at the distal end of the distal support column 4 are provided with an inverted U-shaped turn. and a rope (or chain) 8 having one end fixed to the proximal support column 2 or the base 1 and the other end fixed to the lifting platform 7, a second lifting platform 9 guided by the telescopic mast 6 and movable up and down between the distal end and the proximal end of the telescopic mast 6 and disposed at a position below the elevating platform; a distal end side of the telescopic mast 6; An elevating pulley (or sprocket) that can be moved up and down between the distal end and the proximal end of the distal end support while being guided by the support post 4, the elevating pulley (or sprocket) and the proximal support support 2 of the telescopic mast or the base 1. a hydraulic cylinder disposed between the lifting pulley (or sprocket) and driving the lifting pulley (or sprocket) up and down; A rope (or chain) for raising and lowering the second lifting platform is provided which is fixed to the base and the other end is fixed to the second lifting table 9, and
When the elevating pulley (or sprocket) is located at the end position of the distal end of the distal end support 4 of the telescopic mast 6, the rope (or chain) for elevating the elevating platform is
The second lifting table 9 is characterized in that its length is adjusted so that it is positioned close to the lifting table 7 without colliding with it. (Function) In the elevating type high-altitude work machine of the present invention having the above-described configuration, the second elevating platform 9 arranged below the elevating platform 7 extends and retracts the telescopic mast 6 in order to raise and lower the elevating platform 7. Even when it is driven, the lifting pulley (or sprocket) is connected to the proximal support column 2 or base 1 of the telescopic mast 6 via a hydraulic cylinder, so the second
The elevating platform 9 does not move up and down, and the second elevating platform 9
Since the lifting table 7 and the second lifting table 9 can be raised and lowered completely independently, the lifting table 7 and the second lifting table 9 can be raised and lowered completely independently. Furthermore, the extension movement of the hydraulic cylinder is regulated when the lifting pulley (or sprocket) that is moved up and down by the hydraulic cylinder reaches the end position of the tip end of the telescopic mast 6, and the lifting pulley (or sprocket) is moved up and down by the hydraulic cylinder.
When the end of the extensible mast 6 reaches the end position, the length of the rope (or chain) for suspending the second lifting platform is adjusted in advance so that the second lifting platform is in a close position where it does not collide with the lifting platform 7. Therefore, there is no danger of the second lifting platform colliding with the lower side of the lifting platform 7. (Example) An example of the elevating type high-altitude work machine of the present invention will be described based on FIG. 3 and subsequent figures. Reference numerals 1 to 13 shown in FIGS. 1 and 2 and described as the prior art are also used in the following description as having the same meaning. FIG. 3 is a perspective view of the lifting type high-altitude work machine of the present invention (however, a part of the base 1 is omitted). In FIG. 3, reference numeral 2 denotes a proximal support column, the proximal end of which is pivotally connected to the outer end of a telescoping arm 12 that is fitted into the pivot base 11 so as to be horizontally telescopic. It is located. The pair of left and right proximal supports 2 are connected to the base 1 by undulating cylinders 13 (not shown).
It is installed almost upright. Reference numeral 4 denotes a distal column, which is telescopically engaged with the left and right proximal columns 2, and the ends of the distal ends of the left and right proximal columns 4 are connected by a cross beam 17. Further, the distal ends of the left and right proximal supports 2 are connected by a cross beam 17. A pair of pulleys 3 are attached to the left and right ends of the cross beam 17'. The proximal ends of the left and right proximal supports 2 are connected by a cross beam 17'', and the proximal ends of the distal support supports 4 are also connected by a cross beam 1.
7". The rod end of the telescopic device 5 is pivotally connected to the cross beam 17", and the cylinder head of the telescopic device 5 is pivotally connected to the cross beam 17". The distal end support 4, which is telescopically engaged with the proximal support 2, is raised and lowered by the telescopic device 5, and the telescopic mast 6 is extended and contracted.7 is an elevating platform; , is guided by the distal support column 4, is movable up and down between the distal end and the base end of the distal support column 4, and is composed of a bucket 23 and an elevator guide receiver 21. 9 is a second
The lifting platform is guided by the telescopic mast 6 and is movable up and down between the distal end and base end of the telescopic mast 6, and is disposed below the elevating platform 7. and lifting platform guide receiver 2
It consists of 2. 14 is an elevating pulley that can be moved up and down, and is connected to the tip side support 4 of the telescopic mast 6.
A pair of guides 15 are pivotally connected to the left and right ends of a guide 15 that can be moved up and down between the distal end and the proximal end of the distal support column 4 while being guided by the guide. 16 is a hydraulic cylinder,
The cylinder head of the hydraulic cylinder 16 is pivotally connected to the cross beam 17, and the rod tip end is pivotally connected to the guide 15. The hydraulic cylinder 16 moves the elevating pulley 14 up and down. FIG. 4 is a perspective view illustrating the elevating platform guide of the elevating type high-altitude working machine of the present invention. In FIG. 4, reference numerals 19 and 20 are lifting platform guides, and the lifting platform guide 19 is approximately equal in length to the tip side column 4 of the telescopic mast 6, and is attached to the front side of the tip side column 4. They are connected in parallel to each other via a pair of left and right supporting members. Further, the elevating platform guide 20 has approximately the same length as the proximal support column 2 of the telescopic mast 6, and is connected parallel to the front side of the proximal support column 2 via a pair of left and right supports. There is. A pair of holes are opened on the left and right sides of one end of the lift guide receiver 21 into which the lift guide 19 is inserted, and the lift guide receiver 21 is slid along the lift guide 19. On the other hand, a bucket 23 is attached to the other end of the lifting guide receiver 21. Therefore, the bucket 23 is adapted to move up and down along the elevator platform guide 19 via the elevator platform guide receiver 21. A pair of holes on the left and right sides are provided at one end of the lifting guide receiver 20 into which the lifting table guides 19 and 20 are inserted, and the lifting guide receiver 22 is configured to slide along the lifting table guides 19 and 20. It's getting old. That is, when the lifting table guide receiver 22 is located on the side of the distal end column 4, the lifting table guide 19 is fitted into the lifting table guide receiver 22, and when it is located on the proximal column 2 side, the lifting table guide 19 is inserted into the lifting table guide receiver 22. The elevating table guide 20 is inserted therein. In addition, the lifting platform guide receiver 22 is connected to the lifting platform guide 1.
When moving from the lifting table guide 20 side to the lifting table guide 20 side (or from the lifting table guide 20 side to the lifting table guide 19 side), once both the lifting table guides 19 and 20 are inserted into the lifting table guide receiver 22, It is designed so that only one side can be inserted. Therefore, the lifting table guide support 22 is always supported by the lifting table guide no matter where it is located. On the other hand, a second bucket 24 is attached to the other end of the lifting platform guide receiver 22, and the second bucket 24 is connected to the elevator guides 19, 20 via the lifting platform guide receiver 22.
It is designed to rise and fall along the Here the third
Reference numeral 8 in the figure denotes a rope that is passed around the left and right pulleys 3 in an inverted U-shape, with one end fixed to the left and right ends of the cross beam 17, and the other end attached to the left and right ends of the elevator guide receivers 21 of the elevator platform 7. It is attached to the end. The length of this rope 8 is set so that when the tip side support 4 contracts and the cross beam 17' and the guide 15 come into contact, the lifting platform 7 is located at a close position where it does not collide with the second lifting platform 9. It has been adjusted. Reference numeral 18 denotes a rope for raising and lowering the second lifting platform, which is passed around the pair of left and right lifting pulleys 14 in an inverted U-shape, and one end of which is fixed to the tip of the proximal support column 2 of the telescopic last 6; The other end is fixed to the second elevating table guide receiver 22. The rope 18 for ascending and descending the second elevating platform is
The length of the guide 15 is adjusted so that when the guide 15 extends and comes into contact with the cross beam 17', the second lifting platform 9 is located at a close position where it does not collide with the lifting platform 7. Next, the effect will be explained. Now, when the telescoping device 5 is extended and retracted and the telescoping mast 6 is driven to extend and retract, the rope length (hereinafter referred to as the first
By changing the length of the rope, the lifting platform 7 can be moved up and down. At this time, the guide 15 is connected to the proximal support column 2 via the hydraulic cylinder 16 and does not move up or down. Therefore, since the elevating pulley 14 also does not move up and down, the rope length from the elevating pulley 14 to the point where it is fixed to the tip of the proximal support column 2 (hereinafter referred to as the second rope length) is the fixed length of the rope 18 for elevating the second elevating platform. ) does not change, so the second
The lifting platform does not move up or down. That is, even if the elevating table 7 is moved up and down, the second elevating table 9 is not moved up and down. Next, when the hydraulic cylinder 16 is expanded and contracted to extend and retract the guide 15 along the distal support column 4, the lifting pulley 14 moves up and down, the second rope length changes, and the second lifting platform 9 moves up and down. At this time, the distal column 4 is connected to the proximal column 2 by the telescoping device 5 and does not move up or down. Therefore, since the pulley 3 does not move up or down, the length of the first rope does not change either, and the lifting platform 7 does not move up or down. Therefore, the elevating table 7 and the second elevating table 9 can be moved up and down independently of each other using the telescopic device 5 and the hydraulic cylinder 16. Further, when the guide 15 comes close to and comes into contact with the cross beam 17' due to the extension movement of the hydraulic cylinder 16, the extension movement of the hydraulic cylinder 16 is thereby regulated and stopped. Therefore, in this state, the second elevating table 9 is located at a close position where it does not collide with the elevating table 7 (i.e., the second elevating table 9
The length of the rope for suspending the second lifting platform 9 is adjusted in advance so that the worker on the second lifting platform 9 will not be caught between it and the bottom surface of the lifting platform 7.
The second lifting platform 9 never collides with the lifting platform 7. Conversely, when the cross beam 17' comes close to and comes into contact with the guide 15 due to the contraction movement of the expansion and contraction device 5, the contraction movement of the expansion and contraction device 5 is thereby regulated and stopped.
Therefore, even in this state, the lifting platform 7 is the second lifting platform 9.
The length of the rope suspending the lifting platform 7 is adjusted in advance so that the worker on the second lifting platform 9 is in a close position where it does not collide with the lower surface of the platform 7 (i.e., a position where the worker on the second platform 9 is not pinched between the lower surface of the platform 7). Therefore, the lifting platform 7 will not collide with the second lifting platform 9. In other words, even if the elevator platform 7 or the second elevator platform 9 is raised or lowered, the two elevator platforms will never come closer than a certain distance. (Effects of the Invention) Since the present invention is configured and operates as described above, it is possible to raise and lower the two elevators completely independently, and it is possible to cause the two elevators to collide or to move the second elevator This is highly effective as there is no danger that the worker on board the platform 9 will be caught between the platform and the lower surface of the platform 7.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional elevating type aerial work machine, Fig. 2 is a sectional view taken along line AA in Fig. 1, and Figs. 3 and 4 are explanatory diagrams of an elevating type aerial working machine according to the present invention. be. Base; 1. Proximal support; 2. Pulley; 3. Distal support; 4. Telescopic device; 5. Telescopic mast; 6. Lifting platform; 7. Rope; 8. Second lifting platform; 9. Lifting pulley 14. Hydraulic cylinder; 16. Rope for raising and lowering the second lifting platform; 18.

Claims (1)

[Scope of Claims] 1 Base: A proximal support column that is attached to the base in a substantially upright manner, and a distal support column that is telescopically engaged with the proximal support column and has a pulley (or sprocket) at its tip. A telescoping mast that is driven to expand and contract by a telescoping device installed between the proximal column and the distal column, and an elevating mast that is guided by the telescopic mast and can be moved up and down between the distal end and the proximal end of the telescopic mast. A base, and a pulley (or sprocket) at the tip of the distal support column, which is rotated in an inverted U shape, and one end of which is fixed to the proximal support column or the base, and the other end is fixed to the lifting platform. A lift-type aerial work machine equipped with a rope (or chain), which is guided by the telescopic mast and can be moved up and down between the tip of the telescopic mast and the end of the machine, and is located below the lifting platform. a second elevating platform disposed on the telescopic mast; an elevating pulley (or sprocket) that is guided by the distal end support of the telescopic mast and movable up and down between the distal end and base end of the distal end support; the elevating pulley (or sprocket); A hydraulic cylinder disposed between the proximal support of the telescopic mast or the base and driving the lifting pulley (or sprocket) up and down; A rope (or chain) for raising and lowering the second lifting platform is provided, the rope (or chain) is fixed to the proximal support of the telescopic mast or the base, and the other end is fixed to the second lifting platform, and The rope (or chain) for lifting and lowering the platform is arranged so that when the lifting pulley (or sprocket) is located at the end position of the tip end of the tip side column of the telescopic mast, the second lifting platform is located at a close position where it does not collide with the lifting platform. An elevating-type aerial work machine characterized by having its length adjusted so as to allow the user to position the machine.