JPS6214070Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is characterized in that a boom is mounted in a cylindrical boom holder whose base end is pivotally supported toward the swivel base, and the boom is formed at the tip of the boom holder. The boom can be freely inserted and removed from the boom insertion opening side, and when the boom is inserted into and removed from the boom holder, the base end of the boom is temporarily moved to the front side of the boom holder rather than the tip of the boom holder. In a boom removable crane that is supported movably in a substantially vertical direction by a support device, the boom holder has a distal end portion that includes:
A boom support device equipped with a boom support function is installed so as to be rotatable in the vertical direction, and the rotational position of the boom support device is set to be closer to the front side of the boom holder than the base end of the boom when it is supported by the support device. a first position in which the boom proximal end can be extended and supported from below with the boom base end facing the boom insertion opening of the boom holder; The boom holder can be selectively set to a second position in which the boom holder is moved backward to allow vertical movement of the base end of the boom, thereby simplifying the work of attaching and detaching the boom.

Hereinafter, the boom-detachable crane of the present invention will be explained using the boom-detachable truck crane Z shown in FIGS. 1 to 5 as an example. With respect to the swivel base B which is rotatably and removably attached to the loading platform 57 of the truck A via the swivel seat bearing 16, the boom holder 17 pivotally supported on the swivel base B, and the boom holder 17. It has a boom device C having a telescopic boom 1 that is detachably attached, and when moving between work sites, a first divided portion U consisting of a truck A;
It is transported divided into three parts: a second divided part V consisting of the swivel base B and the boom holder 17 of the boom device C, and a third divided part W consisting of the telescopic boom 1 of the boom device C.

Truck A is equipped with a total of four jacking devices 55, 55, . 55, 55, . . . support the vehicle body in a ground state. In addition, the swivel mounting base 5 provided on the loading platform 57 of this truck A
8 is connected to the swivel base B via the swivel seat bearing 16.
is removably attached.

The swivel base B has a main hoisting winch 21 and an auxiliary hoisting winch 22 arranged on a swivel frame 15 which is rotatably and removably attached directly to the loading platform 57 of the truck A via a swivel seat bearing 16. A pair of self-dividing swivel table lifters 18, 18 are attached to both sides of the rear end of the swivel frame 15. The swivel base B is lifted upward by the swivel base lifters 18, 18 and a boom lifter 19 (shown by a chain line in FIG. 1) that is detachably attached to the tip 17b of the boom holder 17, which will be described later. It is separated from A.

As shown in FIGS. 1 and 2, the boom device C has a rectangular cylindrical shape of an appropriate length, and its base end 17a is pivotally supported on the front part of the swivel base 15 by a fulcrum pin 23 so as to be able to rise and fall freely. a boom holder 17, a telescoping boom 1 that is removably inserted into the boom holder 17 from its tip 17b side, and a telescoping boom 1 that is stored on the side of the telescoping boom 1 or on the side of the boom holder 17 or that is telescopic. Tip part 1b of boom 1
The auxiliary jib 6 is attached to the auxiliary jib 6. Incidentally, reference numerals 20 and 20 in the figure are undulation cylinders for raising and lowering the boom holder 17, and the telescoping boom 1 is raised and lowered together with the boom holder 17 by the expansion and contraction of the levitation cylinders 20 and 20.
Moreover, the boom holder 17 has an inner dimension that allows the telescopic boom 1 to be inserted therein, and the tip portion 17
The open end on the b side is a boom insertion port 17c.
A pair of holder-side sheaves 24, 24 are attached to both sides of the upper end of the boom insertion opening 17c by sheave brackets 25, 25 in a state of protruding forward by an appropriate amount from the boom insertion opening 17c.

The telescopic boom 1 is a three-stage telescopic boom having a base end boom 2, a second stage boom 3, and a tip boom 4, which are mutually extendable. An upper sheave group 8 is located above the sheave 5, and a lower sheave group 9 is located below the sheave. During crane work, the main hoist wire rope 12 and the auxiliary hoist wire rope 13 are connected to the main hoist wire rope 12 and the auxiliary hoist wire rope 13, which are stretched through the upper sheave group 8 and the lower sheave group 9, as shown by chain lines in FIG. 10 and an auxiliary hook 11 are respectively attached. This telescopic boom 1 is
The telescopic boom 1 is inserted into the boom holder 17 from the base end 1a side.
When the base end 1a of the telescoping boom 1 reaches a predetermined position on the base end 17a side of the boom holder 17, the boom holder 17 moves in the vertical direction.
Fixed pin receiving holes 1 on the telescopic boom 1 side that overlap each other
4 and boom holder 17 by inserting the fixing pin 34 into the fixing pin receiving hole 33 on the boom holder 17 side.

Further, reference numeral 46 is a boom 1 pull-out device that acts to pull out the telescopic boom 1 from inside the boom holder 17, and this boom pull-out device 46 is
As shown in FIG. 2, a sheave 50 for extracting the boom
A pair of wire latching pins 51, 51 formed at both ends of the sheave holder 49 to which the sheave holder 49 is attached, and a pair of boom-side wire latching pins 48, 48 formed on both sides of the base end 1a of the telescopic boom 1, respectively. The wire ropes 47, 47 for pulling out the boom are connected to each other and have the same length. The wire ropes 47, 47 for pulling out the boom are passed around the holder-side sheaves 24, 24 and the guide roll 26 provided at the tip 17b of the boom holder 17, respectively, and then pulled out to the upper surface 17e of the boom holder 17. . Note that this boom drawer sheave 50 has an auxiliary winding wire rope 13 as will be described in detail later.
is wrapped around.

The telescopic boom 1 can be pushed into or pulled out from the boom holder 17 by appropriately winding and unwinding the main wire rope 12 and the auxiliary wire rope 13. There is. That is, when the telescopic boom 1 is pulled out or pushed in, the main winding wire rope 12 and the auxiliary winding wire rope 13 are connected to the main winding hooks 10, respectively, as shown in FIGS. 2 and 3.
Then, the auxiliary hoisting hook 11 is removed, and the main hoisting wire rope 12 is passed directly from the rear side of the boom holder 17 to the upper surface side of the telescopic boom 1, and the upper sheave group 8 and the lower side After passing around the sheave group 9 and pulling it out to the lower surface 1c side of the telescopic boom 1, the wire rope end 12a is hooked to the wire rope of a boom support device 35, which will be described later, and is attached to the lower end of the boom insertion port 17c of the boom holder 17. At the same time, the auxiliary winding wire rope 13 is pulled out from the base end 17a side of the boom holder 17 to the distal end 17b side, and after passing it around the sheave 50 of the boom pull-out device 46, the wire rope 13 is hooked onto the boom holder base end 17a side. Fold back over the cable end 1
3a is attached to the holder-side wire hanging bracket 52 provided on the upper surface 17e of the boom holder 17, as shown by reference numeral 13a'' in FIG. When the main wire rope 12 is unwound, the telescopic boom 1 is inserted into the boom holder 17 by the rope tension of the main wire rope 12. Conversely, when the main wire rope 12 is unwound, the auxiliary wire rope 1
3, the telescopic boom 1 is pulled out from inside the boom holder 17 toward the boom holder tip 17b by the rope tension of the auxiliary winding wire rope 13. That is, in this case, the main wire rope 12 functions as a pushing device for the telescopic boom 1, and the auxiliary wire rope 13 functions as a device for pulling out the telescopic boom 1.

At this time, the amount of protrusion of the holder side sheaves 24, 24 from the boom insertion port 17c and the telescopic boom 1
base end surface 1d and boom side wire latching pins 48, 4
8, as shown in FIG.
4, the telescopic boom base end 1a is completely pulled out from the boom insertion port 17c, and at least the base end surface 1d of the boom support device 35 (described later) is attached to the lower end of the boom insertion port 17c. Fixing brackets 29, 29 for fixing
It is appropriately set so as to be located closer to the end portion 1b of the telescopic boom.

The boom support device 35 includes the boom support 1
This device is attached to the lower end of the boom insertion port 17c of the telescopic boom 1 and serves to simplify the work of attaching and detaching the telescopic boom 1 to the boom holder 17, and is the main feature of the present invention. That is, when the base end 1a of the telescopic boom 1 is vertically suspended from the holder-side sheaves 24, 24 by the wire ropes 47, 47 of the boom pull-out device 46 as described above, the boom device C Boom base end 1a
is completely pulled out from the boom insertion port 17c of the boom holder 17 and positioned in front of the boom insertion port 17c, so when pushing the telescopic boom base end 1a toward the boom insertion port 17c from this state At the same time, the base end 1a of the telescopic boom is supported from below to look into the boom insertion opening 17c, and the wire rope 4 of the boom pull-out device 46 is
It is necessary to loosen the tension of the ropes 7 and 47, and conversely, when lowering the telescopic boom base end 1a downward from this state and mounting it on a trailer etc., the base It is required that there be no obstacles that restrict the downward movement of the end portion 1a. Therefore, in the illustrated embodiment, the boom insertion port 17c
The base end 1a of the telescoping boom 1, which in its first position extends to the front side of the boom from the boom insertion port 17c and is in a suspended state, is supported from below and inserted into the boom insertion port. 17c, and in its second position, it retreats to the rear side of the boom from the base end 1a of the telescopic boom 1 in the suspended state, allowing the base end 1a of the telescopic boom 1 to move in the vertical direction. A support device 35 is attached for smoothing.

The specific configuration and operation of this boom support device 35 will be explained below.

The boom support device 35 includes a pair of left and right support frames 3 formed in a square shape as shown in FIG.
6 and 36 are integrally connected to each other with an appropriate interval in the boom width direction by a joint material 37, and the intermediate corner portion 3 of each support frame 36 and 36 is
6a, 36a and one end portion 36b, 36b are respectively provided with first receiving rolls 38, 38 and second receiving roll 3.
9,39 is installed. Moreover, this boom support device 35 has its respective support frames 36, 3.
6 intermediate corner portions 36a, 36a and the other end 36
Support side fixing pin receiving hole 4 on c and 36c respectively
0 and 40, and support side fulcrum pin receiving holes 41 and 41 are formed. This boom support device 35 is
Boom insertion port 17 of boom holder tip 17b
Support fulcrum brackets 31, 3 are formed closer to the boom holder base end 17a than c and project downward from the boom holder lower surface 17a.
The fulcrum pin receiving holes 32, 32 formed in 1 are aligned with the support side fulcrum pin receiving holes 41, 41, and the holder side fulcrum pin receiving holes 32, 32 are aligned with each other.
By inserting the support fulcrum pins 28, 28 into the support side fulcrum pin receiving holes 41, 41, the support device 35 fulcrum bracket 3 is assembled as shown in FIG.
1 and 31, and is pivotably supported in a downwardly hanging state. The state in which the boom support device 35 is suspended by the support fulcrum pins 28, 28 is referred to as the second position of the boom support device 35.

In addition, this boom support device 35 has a stopper 43 which is rotated from the second position about the support fulcrum pins 28, 28 and protrudes from the side thereof, and which protrudes from both sides of the lower end of the boom insertion opening 17c of the boom holder 17. When the pair of support fixing brackets 29, 29 provided are pulled forward to the position where they come into contact with the lower surface 29b, the support side fixing pin receiving holes 40, 40 are aligned with the support fixing brackets 2.
Support fixing pin receiving hole 30 formed in 9, 29,
30, and the supporting fixing pin receiving holes 40, 40 and the support fixing pin receiving holes 30, 40 on the boom holder 17 side, which match each other,
By inserting the support fixing pins 27, 27 into the boom support device 30, the boom support device 35 is installed in the boom with the respective receiving rollers 38, 38, 39, 39 facing upward and protruding forward from the boom insertion port 17c. It is fixed to the holder 17 side. The rotational position of the boom support device 35 fixed to the boom holder 17 side by the support fulcrum pins 28, 28 and the support fixing pins 27, 27 in this way is referred to as the first position of the boom support device 35.

The raising operation of the boom support device 35 is performed by winding the main winding wire rope 12 hooked onto the wire rope hook portion 42 provided at the center of the splicing member 37, as will be described later.

Also, when this boom support device 35 is set at the first position, the first receiving rolls 38, 38
The upper surface height is approximately the same height as the lower surface 1c of the telescopic boom base end 1a facing the boom insertion port 17c, and when set to the second position, the telescopic boom base end is closer to the height. Its mounting position, weight distribution, etc. are such that the end of the telescopic boom 1 is located closer to the boom holder 17 than the base end surface 1d of the telescopic boom 1 suspended from the holder-side sheaves 24, 24 by wire ropes 47, 47 for pulling out the boom. is set appropriately. In addition, when the boom support device 35 is set at the first position,
The height of the first receiving rollers 38, 38 is made to be slightly higher than the height of the second receiving rollers 39, 39.

Next, the method of attaching and detaching the telescopic boom 1 of the truck crane Z of the illustrated embodiment and its operation will be explained with reference to FIGS. 3 to 5. When pulling out the boom holder 17 and separating it, first, as shown in FIG. 1 to the rear side of track A. next,
As shown in Figs. 2 and 3, the main hoisting winch 21
The main winding wire rope 12 is pulled out from the base end 17a of the boom holder 17 to the tip 1b of the telescopic boom 1, and then routed around the upper sheave group 8 and lower sheave group 9 attached to the telescopic boom tip 1b. The wire rope hooking portion 4 of the boom support device 35 is folded back toward the boom holder tip 17b side and the wire rope end 12a is set in the first position.
2 and the auxiliary winding wire rope 13 of the auxiliary winding winch 22 is attached to the boom side wire rope latching pins 48, 48 provided at the base end portion 1a of the telescopic boom.
One end 47b, 47b of the wire rope 47, 47
The upper surface 17 of the boom holder 17 with the
The cable is routed around the sheave 50 of the boom pull-out device 46 pulled out to the e side, and its cable end 13a is hooked to a holder-side wire rope hooking bracket 52 protruding from the upper surface of the boom holder 17. This completes the wire rope hanging work.

When the wire rope routing work is completed, the fixing pin 34 connecting the telescopic boom 1 and the boom holder 17 is removed, and the telescopic boom 1 is removed.
At the same time, the auxiliary jib 6 fixed to both the telescopic boom 1 and the boom holder 17 is separated from the boom holder 17 side and fixed only to the telescopic boom 1 side.
With the above steps, the preparation for pulling out the telescopic boom 1 is completed.

Next, while rewinding the main wire rope 12, the auxiliary wire rope 13 is wound in, and the telescopic boom 1 is gradually pulled out by the auxiliary wire rope 13.
At this time, the main winding wire rope 12 is
It acts as a self-propulsion prevention device to prevent the telescopic boom 1 from coming off suddenly. Moreover, this telescopic boom 1 has its lower surface 1c connected to a boom support device 35.
The first receiving rollers 38, 38 and the second receiving roller 3
9 and 39, and can be smoothly pulled out from the boom holder 17.

When the amount of overlap between the telescopic boom 1 and the boom holder 17 reaches a predetermined amount, the pull-out operation of the telescopic boom 1 is temporarily stopped, and the telescopic boom 1 is mounted at a position directly below the telescopic boom 1 as shown in Fig. 4. The trailer truck 60 for this purpose is driven backwards and enters the truck A from the rear side, and
b is the front part 61 of the loading platform 61 of the trailer truck 60;
The trailer truck 60 is stopped at a position directly above the rear end portion 62a of the gooseneck 62 formed at point a.

Next, the jacking devices 55, 5 of the telescopic boom 1
5, ... to tilt the truck A rearward, and move the lower sheave group 9' provided at the tip 1b' of the telescopic boom 1' onto the gooseneck 62 of the trailer truck 60, as shown by the chain line in FIG. Place it on. In this state, the pulling out operation of the telescopic boom 1 is restarted, and the base end 1a of the telescopic boom 1 is moved from the position 1' shown by the chain line to the wire ropes 47, 47 of the boom pulling out device 46, as shown by the solid line.
to a position where it is suspended vertically from the holder side sheaves 24, 24. On this occasion,
The tip end 1b of the telescopic boom 1 is moved from the gooseneck rear end 62a side to the front end 62b side as the lower sheave group 9 rolls. In this state, the telescopic boom base end 1a is separated from the boom support device 35 and the boom extractor 4 is moved away from the boom support device 35.
It is supported in a completely suspended state by wire ropes 47, 47 of No. 6. That is, in this embodiment, the boom pull-out device 46 functions as a support device within the scope of the utility model registration claims.

Next, the support fixing pins 27, 27 of the boom support device 35 are pulled out, and the main winding wire rope 12 is rewinded, and the setting position of the boom support device 35 is switched from the first position to the second position.
Furthermore, the rope end 12a of the main winding wire rope 12 is removed from the boom support device 35.

Next, as shown in FIG. 5, the auxiliary winding wire rope 13
The telescopic boom base end 1a is lowered by gradually rewinding the telescopic boom base end 1a, and the telescopic boom base end 1a is placed on the sleeper 63 attached to the rear end 61b of the trailer truck 60. 47, 47 from the telescopic boom base end 1a side. This completes the disassembly work of the telescopic boom 1.

On the other hand, when reassembling the telescopic boom 1 from the disassembled state to the boom holder 17 side,
With the boom support device 35 tilted slightly backward and with the boom support device 35 set in the second position, first,
One end 47 of the wire ropes 47, 47 of the boom pull-out device 46 connected to the auxiliary winding wire rope 13
b, 47b are attached to the boom side wire rope retaining pins 48, 48 of the telescopic boom 1 placed on the trailer truck 60 via the holder side sheaves 24, 24.
Then, as shown in FIG.
7, facing the boom insertion port 17c. Next, the main wire rope 12 is wrapped around the upper sheave group 8 and the lower sheave group 9 of the telescopic boom 1, and the rope end 12a is hooked to the wire rope hooking part 42 of the boom support device 35, and then Afterwards, the main winding wire rope 12 is wound into the boom support device 35.
is set at the first position, and further fixed with the support fixing pin 27. At this time, the base end 1a of the telescopic boom 1 is still supported by the auxiliary winding wire rope 13, but when the auxiliary winding wire rope 13 is then unwound, the base end 1a of the telescopic boom 1 is supported by the boom support device 35 as shown in FIG. It is supported from below by two receiving rollers 39, 39.

Next, while rewinding the auxiliary winding wire rope 13, the main winding wire rope 12 is reeled in, and the telescopic boom 1 is pushed into the boom holder 17 to a position where the amount of overlap between the telescopic boom 1 and the boom holder 17 becomes a predetermined amount. In this state, the boom pushing operation is interrupted, the truck A is returned to the horizontal state, the tip portion 1b of the telescopic boom 1 is lifted from the loading platform 61 of the trailer truck 60, and the telescopic boom 1 is moved to the side of the boom holder 17. Hold and support.

After the telescopic boom 1 is cantilever-supported on the boom holder 17 side, the pushing operation of the telescopic boom 1 is resumed, and the telescopic boom 1 is pushed to a predetermined position on the boom holder 17 as shown in FIG. 1 and boom holder 17 with pin 3
Combine with 4. Furthermore, the distal end side of the auxiliary jib 6 is fixed to the boom holder 17 side, and the work of assembling the telescopic boom 1 is completed.

In the illustrated embodiment, when loading the boom 1 onto the trailer truck 60, the lower sheave group 9 provided at the tip 1b of the boom 1 is used as a support member for the boom tip 1b. In another embodiment of the present invention, as shown in FIG. 6, an appropriate number of dedicated boom support members 70, 70, . . . having rollers 71 are attached to the boom tip 1b,
The boom tip portion 1b may be supported by the boom support members 70, 70, .

Furthermore, in the above embodiment, the telescopic boom 1
When the boom holder 17 is attached to and detached from the boom holder 17, the telescopic boom base end 1a is temporarily suspended and supported by the boom pull-out device 46, but the present invention is not limited to this. Instead of the boom pull-out device 46, the base end portion 1a of the telescopic boom may be supported by, for example, a crane device or a jacking device provided on the side of the trailer truck 60 for transporting the telescopic boom.

Next, to explain the effect of the present invention, the boom removable crane of the present invention has a boom that is inserted into the tip of the boom holder (removably from the tip side) in its first position. The base end of the telescopic boom, which is extended to the front side of the boom from the boom insertion opening and is suspended, is supported from below so as to face the boom insertion opening, and in the second position, A boom support device is installed so as to be rotatable in the vertical direction, and operates so as to be able to move the base end of the telescopic boom in the vertical direction by retracting to the rear side of the boom from the base end of the telescopic boom in a suspended state. Since the rotational position of the boom support device can be selectively set depending on the situation, by changing the setting position of the boom support device as appropriate, the boom can be moved by the boom support device when the boom is installed. The boom can be supported and pushed in easily, and when the boom is removed, the boom can be pulled out from the boom holder, lowered, and mounted on a designated vehicle, etc., simplifying the work of attaching and detaching the boom. This has the practical effect of making it possible to achieve the following.

[Brief explanation of the drawing]

FIG. 1 is an overall view of a boom detachable crane according to an embodiment of the present invention, FIG. 2 is an enlarged exploded perspective view of the boom device of the boom detachable crane shown in FIG. 1, and FIG.
5 through 5 are explanatory views of the use state of the boom detachable crane shown in FIG. 1, and FIG. 6 is a side view of essential parts of the boom detachable crane according to another embodiment of the present invention. 1...Boom, 17...Boom holder, 17
a...Base end of boom holder, 17b...Tip of boom holder, 35...Boom support device, B...Swivel base.

Claims (1)

[Scope of utility model registration request] A boom 1 is mounted in a cylindrical boom holder 17 whose base end 17a is pivotally supported on the side of the swivel base B, and the boom 1 is further installed in a boom insertion opening formed at a tip end 17b of the boom holder 17. 17
The boom 1 can be freely inserted and removed from the boom holder 17, and when the boom 1 is inserted into and removed from the boom holder 17, the base end 1a of the boom 1 is temporarily moved to the front side of the boom holder rather than the tip 17b of the boom holder 17. A boom detachable crane is supported movably in a substantially vertical direction by an appropriate support device 46, and a boom support device 35 having a boom support function is installed at the tip 17b of the boom holder 17. The boom support device 35 is mounted so as to be rotatable in the vertical direction, and the rotational position of the boom support device 35 is extended to the front side of the boom holder from the base end 1a of the boom 1 in the supported state by the support device 46, so that the boom base A first position in which the end portion 1a can be supported from below with the end portion 1a facing the boom insertion port 17c of the boom holder 17, and a lower position than the base end portion 1a of the boom 1 in a state where it is supported by the support device 46. A boom removable crane characterized in that the boom holder can be selectively set to a second position in which the boom holder is retracted to the rear side and vertical movement of the boom base end 1a is permitted.