JP2648878B2 - Mounting device of jack device for supporting revolving body in crane truck - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a crane vehicle in which a revolving body that supports a boom is detachably mounted on a vehicle, and more particularly, such a revolving crane that is detachable from a vehicle. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revolving unit supporting jack device used when a revolving unit is removed from or mounted on a vehicle in a vehicle.

(Prior Art) Some large cranes cannot be driven on public roads with a revolving structure and a boom (telescopic boom) mounted on the vehicle due to legal regulations. The vehicle and the telescopic boom are detached from the vehicle, and the vehicle is moved to the work site in a state where the revolving structure and the like are removed.
And the revolving unit and the telescopic boom are assembled and used on a crane vehicle at the work site.

FIG. 14 and FIG. 15 show an example of this type of conventional revolving-body detachable crane truck (Japanese Patent Publication No. 61-4756). In the known crane truck shown in FIGS. 14 and 15, the revolving unit 102 can be separated from the vehicle 101 at the turntables 121 and 122, and the right and left sides of the rear end 102a of the revolving unit 102 can be separated. A pair of left and right revolving body supporting jack devices 105 are fixedly provided on both sides, and a pair of left and right boom supporting jack devices 104 are detachably provided at a longitudinally intermediate portion of the telescopic boom 103. Each revolving body supporting jack device 105 is attached to the tip of an inner cylinder of a telescopic cylinder 109 that expands and contracts horizontally with respect to the revolving body 102. The jack device 105 projects outward to a position where the jack device 105 can straddle the vehicle in the width direction. The jack device 104 for supporting the boom is separated from the telescopic boom 103 and fixed to the vehicle 101 during crane operation, and is separated from the vehicle and mounted to the telescopic boom 103 during detaching work of the revolving unit and the telescopic boom. Then, when removing the revolving superstructure 102 and the telescopic boom 103 from above the vehicle 101, as shown in FIG.
After rotating the swing body 102 so as to face the rear side of 01, the connection between the swing body 102 and the vehicle 101 is released, and then a total of four jacks (104, 105) are extended to extend the telescopic boom. The revolving structure 102 and the telescopic boom 103 are supported in a state in which the revolving structure 102 and the telescopic boom 103 are separated upward from the vehicle 101, and the vehicle 101 is run in the direction of the arrow X and pulled out from below the revolving structure. When the revolving unit 102 and the telescopic boom 103 separated from the vehicle 101 are mounted on the trailer, the trailer is run while the revolving unit and the telescopic boom are supported by the four jacks (104, 105), and the loading platform is moved. After being positioned directly below the revolving unit 102, the jacks (104, 105) may be reduced and the revolving unit 102 may be seated on the trailer carrier.

(Problems to be Solved by the Invention) However, in the known revolving body disassembly and assembly apparatus for a crane truck shown in FIGS. 14 and 15, a jack device for supporting a revolving body is used.
Since the 105 is fixed to the revolving structure 102, it is necessary to mount the jack device 105 such that the lower end surface (the lower surface of the grounding plate) is located below the upper surface of the loading platform of the vehicle 101 when the jack device 105 is minimized (revolving). In order to prevent the jack device 105 from abutting against the vehicle 101 when the base 102 turns), therefore, the expansion / contraction of the revolving body supporting jack device 105 for lifting the revolving body 102 on the vehicle 101 when the revolving body is attached / detached. It is necessary to increase the stroke H. As a means for increasing the extension stroke H of the revolving unit supporting jack device 105, a two-stage extension type having three extension cylinders as shown in FIG. However, there is a problem that such a two-stage telescopic jack device 105 is expensive and increases the cost of the entire crane truck. In addition, when a one-stage telescopic type consisting of two telescopic cylinders is adopted as the revolving body supporting jack device 105, it is necessary to use a long one to secure the telescopic stroke H. In this case, the upper end of the jack device protrudes upward to a considerably high level, which causes a problem that the entire height of the crane truck becomes large. Further, when the jack device 105 having such a long length is used, as a countermeasure against the problem that the upper end of the jack device protrudes greatly upward, the jack device is revolved.
It has also been considered that the jack device can be held up and down on the side surface of the revolving member 102 so that the jack device can be held in a horizontal position when the jack device is not used. Mounting structure becomes complicated.

SUMMARY OF THE INVENTION In view of the above problems, the present invention enables a revolving unit to be attached and detached using a one-stage telescopic revolving unit supporting jack device composed of two telescopic cylinders, and such a one-stage telescopic unit. Even when the jack device for supporting the revolving body is used, the overall height of the crane vehicle does not increase, and the jack device for supporting the revolving body in the crane vehicle which can simplify the structure for supporting the revolving body. It is an object to propose a mounting device.

(Means for Solving the Problems) According to the present invention, as a means for solving the above problems, a boom is mounted on a vehicle which can be jacked up by jack devices provided on both front and rear sides of a vehicle body so that the boom can be freely raised and lowered. For revolving body support for mounting the revolving body so that the body can be freely removed and the rear end of the revolving body when the boom is directed toward the front of the vehicle extends rearward from the rear end of the vehicle body, and further support the revolving body A jack device and a pair of boom support jack devices that are detachably mounted on the boom in the retracted storage state and are installed so as to straddle the vehicle body in the width direction push the revolving body together with the boom upward from the upper surface of the vehicle. In a crane truck capable of being lifted up and separated, the revolving body supporting jack device is configured so that an upper cylinder and a lower cylinder having a ground plate at a lower end can be mutually extended and contracted by an extension device. The connecting part formed on the upper cylinder side and the connecting part formed on the rear end of the revolving body are detachably connected to the revolving body by a connecting tool so as to be detachably attached to the revolving body, and At a position near the upper end of the revolving body rear end, a wire fastening portion for detachably securing each upper end of a pair of hanging wires for suspending and holding the revolving body supporting jack device is provided, The revolving body supporting jack device has a fastening portion for fastening the lower end of each of the hanging wires to the left and right sides of the lower cylinder or the grounding plate, and the left and right sides of the upper cylinder. A wire guide section for guiding each hanging wire in a vertically inserted state, and further setting the length of each hanging wire to a revolving structure by lowering the lower end of each hanging wire. After fixing the hanging wire on the holding jack device side and inserting each hanging wire through each wire guide portion, when fixing the upper end of the hanging wire to the wire fastening portion on the revolving body side When the jack device for pushing up the vehicle is not operated, the ground plate of the jack device for supporting the revolving body is grounded on the ground, and the jack device for pushing up the revolving body is in contact with the jack device when the jack device for pushing up the vehicle is operated. The revolving body supporting jack device is set so as to be suspended in a vertical posture with the main plate separated upward from the ground.

(Operation) According to the present invention, the jack device for supporting the revolving unit is detachably mounted at the rear end of the revolving unit. When transporting by a transport vehicle, the jack device for supporting the revolving unit can be removed. In addition, if the connecting part on the revolving body supporting jack device side and the connecting part on the revolving body side are connected by a connecting tool, the revolving body side can be supported only by the extension action of the revolving body supporting jack device. In this case, the required expansion and contraction stroke of the revolving unit supporting jack device is from the height position of the connecting portion provided on the upper cylinder side to the height position of the connecting portion provided on the revolving unit side in the most contracted state of the jack device. Only the total length of the height range in the vertical direction and the height range required to make the revolving structure float on the vehicle is sufficient, and in the state where the revolving structure supporting jack device is in the minimum contraction state, the connecting portion on the jack device side is required. The closer the vertical distance between the height position and the height position of the connecting portion on the revolving unit side, the smaller the required expansion / contraction stroke of the revolving unit supporting jack device can be. Further, the jack device for supporting the revolving body may be configured such that when the jack device is connected to a rear end of the revolving unit, the jack device for supporting the revolving unit is suspended from an upper portion of the revolving unit in a vertical posture by a suspending wire. By extending and retracting, the connecting portion on the revolving body supporting jack device side and the connecting portion on the revolving body side can be aligned,
In addition, even if the connecting portion on the revolving-body supporting jack device side and the connecting portion on the revolving-body side are slightly displaced, an operator swings the revolving-body supporting jack device by hand so that the two connecting portions can be moved. Can be aligned.

(Effects of the Invention) Therefore, according to the mounting device for the jack device for supporting the revolving unit in the crane vehicle of the present invention, the jack device for supporting the revolving unit can be detached from the revolving unit. As the jack device, a device having a small telescopic stroke can be used, and is not an expensive device like the known two-stage telescopic revolving structure supporting jack device shown in FIGS. Inexpensive materials consisting of a single-stage telescopic type can be used, so that the cost of materials can be reduced. In addition, even when the single-stage telescopic type is used, the revolving unit is pushed up when a revolving unit is pushed up from below. The upper portion of the body supporting jack device does not protrude above the upper surface of the revolving structure, and the overall height of the crane vehicle does not increase. Also, when attaching or detaching the revolving structure,
The revolving body portion can be supported by the revolving body supporting jack device alone, and the configuration for supporting the revolving body can be simplified. Further, when attaching the revolving unit supporting jack device to the rear end of the revolving unit, that is, when aligning the connecting unit on the revolving unit supporting side with the connecting unit on the revolving unit side, the revolving unit supporting jack device is used. Since the revolving unit supporting jack device itself can be expanded and contracted in a state of being suspended from the upper portion of the revolving unit with a suspending wire in a vertical posture, the mounting operation of the revolving unit supporting jack device can be easily performed, Even when the revolving unit supporting jack device is detachable from the revolving unit, the revolving unit supporting jack is required to align the connecting unit on the revolving unit supporting jack device with the revolving unit side connecting unit. This can be performed without using a special crane or the like for supporting the apparatus, and has an effect that there is no need to prepare such special jack supporting equipment (cranes or the like).

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 13. FIG. 1 to FIG.
5 and FIG. 5 show a large crane truck that cannot run on a public road with the boom (telescopic boom) 3 attached thereto (which is regulated by a law called the so-called road law). FIG. 6 shows a revolving unit supporting jack device 5 used when the revolving unit 2 and the telescopic boom 3 are attached to and detached from the vehicle 1.

The crane truck shown in FIGS. 1 to 3 is a vehicle 1 that can be jacked up by outrigger devices 12, 12,.
The revolving unit 2 on which the telescopic boom 3 is mounted so that it can be raised and lowered in the vertical direction is detachably mounted on the revolving unit 2.

The outrigger devices 12 are provided at a total of four locations on both front and rear sides of the vehicle body 11, respectively. This outrigger device 12,
A jack device 13 is attached to a distal end of an inner cylinder 15 that is made to expand and contract in the vehicle width direction by an expansion device (not shown) in an outer cylinder 14 fixed to the vehicle body 11. And, this outrigger device 12, 12, ..., each inner cylinder 15, 15, ...
By extending the jack devices 13, 13,... In a state where they are projected outward by a predetermined amount as necessary, the vehicle 1 can be supported in a state of being floated from the ground.

The revolving superstructure 2 is capable of horizontally revolving above the rear end of the vehicle body 11, and furthermore, has a turntable 21 on the upper surface of the vehicle body 11 and the revolving superstructure 2.
It is separable between the turntables 22 on the lower surface. The revolving superstructure 2 has a rear end 2a of the revolving superstructure 11 when the telescopic boom 3 is directed forward of the vehicle 1.
It is positioned so as to protrude further backward by a predetermined length than a.

In this embodiment, the telescopic boom 3 has a total of four booms connected sequentially in a telescopic manner, and the base end of the base end boom 31 is mounted on the revolving unit 2 by axle.
The telescopic boom 3 is raised and lowered by a raising and lowering cylinder 32.

Between the upper part of the vehicle body 11 and the telescopic boom 3, when the revolving unit 2 is attached to and detached from the vehicle 1 together with the telescopic boom 3,
A pair of boom supporting jack devices 4, 4 for supporting the telescopic boom 3 side are provided. The jack device 4 for supporting the boom includes an outer cylinder 41 directed in the width direction of the vehicle body and the outer cylinder 41.
It has an inner cylinder 42 slidable inward and outward in the inside, and a jack 43 attached to the tip of the inner cylinder 42. In this embodiment, the outer cylinder 41 of each of the boom-supporting jack devices 4, 4 is a single long one as shown in FIG. The jack devices 4 for supporting the boom can be selectively fixed to the upper surface of the vehicle body 11 or the lower surface of the base boom 31 of the telescopic boom 3. That is, as shown in FIG. 3, the outer cylinder 41 is spaced apart from the outer cylinder 41 by a predetermined distance in the length direction.
Downward brackets 46,4 projecting downward
6, and upward brackets 47, 47 protruding upward are provided, while the downward brackets 46, 46
, And boom-side brackets 37, 37 respectively corresponding to the upward brackets 47, 47 are provided on each side surface of the middle portion in the longitudinal direction of the base end boom 31. And boom side bracket
37,37 and the upward brackets 47,47 on the boom support jack device 4 side are not connected, and the vehicle body side brackets 16,16 and the downward brackets 46,4 on the boom support jack device 4 side.
6 is connected to the telescopic boom 3 in a free state on the vehicle body 11 by the pins 48, 48. On the contrary, the vehicle body side brackets 16, 16 and the boom supporting jack When the downward brackets 46, 46 on the side of the device 4 are not connected, the brackets 37, 37 on the telescopic boom side and the upward brackets 47, 47 on the side of the jack device 4 for supporting the boom are pin 4
If connected at 9,49, the jack device 4 for supporting the boom will be
11 is fixed to the lower surface of the base boom 31 in a free state. During the crane operation, the jack device 4 for supporting the boom is separated from the telescopic boom 3 side, and when the telescopic boom 3 and the swing body 2 are removed, the jack device 4 for supporting the boom is used.
Is fixed to the telescopic boom 3 side. When the inner cylinder 42 is in the most immersed state (the state shown by the solid line in FIG. 3), the jacks 43 are connected to the side surfaces 11b of the vehicle body 11.
When the inner cylinders 42, 42 are in the extended state, the jacks 43, 43 are respectively retracted as indicated by chain lines 43 ', 43'.
The projection 11 projects outward from the side surface 11b by a predetermined width.

A connecting portion 18 is formed at the rear end 11a of the vehicle body 11 for temporarily holding a revolving body supporting jack device to be described later with a stay 17 (see FIG. 7) to hold the posture.

When attaching and detaching the telescopic boom 3 and the revolving superstructure 2 to and from the vehicle 1, the jack devices 4 and 4 for supporting the boom and the fifth
This is performed by using a revolving body supporting jack device 5 shown in FIG. 6 and FIG.

Revolving-body supporting jack device 5 shown in FIG. 5 and FIG.
Is configured such that an upper cylinder (outer cylinder) 51 and a lower cylinder (inner cylinder) 52 having a ground plate 54 at a lower end can be extended and contracted mutually by an extension device (hydraulic cylinder) 53. The upper tube 51 and the lower tube 52 are each formed in the shape of a square tube in this embodiment. For convenience, in the following description, in FIG. 6, the left side of the upper cylinder 51 is the front surface 51a, and the right side is the rear surface 51b.
In FIG. 5, the left and right side surfaces of the upper cylinder 51 are referred to as a left side surface 51c and a right side surface 51d, respectively.

In the upper cylinder 51 of the revolving body supporting jack device 5, the upper cylinder 51 is located at a position closer to the upper side of the left side surface 51 c and the right side surface 51 d.
Are connected to a rear end portion 2a of the revolving structure 2 (a connecting portion 25 provided on the revolving structure rear end portion 2a as described later in detail). The connecting portions 55 are erected upward on the upper surfaces of the platforms 58 fixed to the left side surface 51c and the right side surface 51d of the upper cylinder 51, respectively. As shown in FIG. 5, the connecting portions 55 and 55 are connected to the left side surface 51c and the right side surface 5c of the upper cylinder 51 at the same height position.
Each of them is spaced outward from the front surface 51a of the upper cylinder 51 by a predetermined distance M, as shown in FIG. Also, each of these connecting parts
A pin hole 55a is formed in each of the pins 55 and 55 for inserting a pin 61 (which is a connecting tool in the scope of the claims of the present invention).

The length in the left-right direction of the ground plate 54 of the revolving-body supporting jack device 5 is formed to be considerably larger than the width in the left-right direction of the upper cylinder (outer cylinder) 51. On the left and right sides of the upper surface of the ground plate 54, stoppers for fastening the lower ends 8b, 8b of the two suspension wires 8, 8 for suspending and holding the revolving unit supporting jack device 5 are provided. Attachments 56, 56 are formed. Each of the fastening portions 56, 56 is formed by two standing plates 56b, 56b standing in parallel at predetermined small intervals. Further, a pin hole 56a is formed in the fastening portion 56 so as to penetrate the rising plates 56b, 56b. And this fastening part 56
When fixing the lower end portion 8b of the hanging wire 8 to the pin hole 56a on the fastening portion 56 side and the lower end portion 8b of the wire with the lower end portion 8b of the wire interposed between the rising plates 56b, 56b. This is performed by inserting a common pin 62 into the pin hole. It is preferable that each of the fastening portions 56 be formed at a position sandwiching a straight line passing through the center of gravity of the revolving body supporting jack device 5 in the vertical direction from both sides. When the revolving unit supporting jack device 5 is suspended in step 8, the revolving unit supporting jack device 5 is hardly inclined. In this embodiment, the wire fixing portions 56 are provided on the ground plate 54 side.
In another embodiment, the wire fixing portion may be provided at an appropriate position on the lower cylinder 52 side.

The upper cylinder 51 of the revolving structure supporting jack device 5 is located at the upper end of the left side surface 51c and the right side surface 51d, just above the fastening portions 56, 56 formed on the ground plate 54. Thus, the wire guide portions 57 are formed. Each of the wire guide portions 57, 57 is formed by installing two horizontal pieces 57b, 57b at a distance between the two horizontal pieces 57b, 57b so that the hanging wire 8 can be inserted vertically. Have been. A pin hole 57a for inserting the pin 63 is formed near the outer end of each of the horizontal pieces 57b. And
By inserting the pin 63 into the pin hole 57a in a state where the hanging wire 8 is passed between the two lateral pieces 57b, 57b, the hanging wire 8 does not come off from the inside of the wire guide portion 57. It is preferable that each of the wire guide portions 57 is also provided at a position sandwiching a straight line vertically passing through the center of gravity of the jack device 5 for supporting the revolving body from both sides.

Further, on the upper surface of the upper cylinder 51 of the revolving unit supporting jack device 5, an upwardly protruding piece 71 for positioning when the jack device 5 is mounted on the revolving unit rear end 2a is formed. In this embodiment, the protruding piece 71 is fixedly provided with a narrow plate at the middle of the upper surface of the upper cylinder 51 in the left-right direction and at a position closer to the front. The protruding piece 71 and the connecting portions 55 are provided at positions that are appropriately shifted by a length N in the front-rear direction as shown in FIG.

At the upper end of the revolving unit supporting jack device 5, a hydraulic hose connection portion 59 for supplying a hydraulic pressure to the telescopic device (hydraulic cylinder) 53 is provided.

As shown in FIGS. 1 and 2, the rear end (rear end face) 2a of the revolving unit 2 has a jack device 5 for supporting the revolving unit.
A pair of left and right bracket-shaped connecting portions 25, 25 for connecting the side connecting portions 55, 55 are formed. The connecting portions 25, 25 on the revolving body side are provided at the center in the width direction on the lower surface of the stepped portion 2b provided at the middle portion in the height direction of the rear end face 2a of the revolving body 2, and the two connecting portions on the revolving body supporting jack device side. It is formed with the same interval as the interval between 55 and 55. Also, the connecting part on the revolving unit side
Pin holes 25a, 25a are respectively formed in 25, 25, and the pin holes 25a of the connecting portion 25 on the revolving body side and the pin holes 55a of the connecting portion 55 on the revolving body supporting jack device side are aligned with each other. By inserting a common pin 61 into both pin holes in the closed state, the connecting portions 25, 25 on the revolving unit 2 side can be connected to the connecting portions 55, 55 on the revolving unit supporting jack device 5 side. ing. As shown in FIG. 7, the connecting portions 25, 25 (pin holes 25a) on the side of the revolving unit 2 are pivoted when the revolving unit supporting jack device 5 is minimized immediately below the coupling units 25, 25. When the revolving unit supporting jack device 5 is extended, as shown in FIG. 11, is located considerably above the height position of the connecting portions 55, 55 (pin holes 55a) on the body supporting jack device side. The connecting portion 55 (pin hole 55) on the side of
a) is formed at a position where it reaches the connecting portion 25 (pin hole 25a) of the revolving superstructure.

Two wire fastening portions 28, 28 for fastening the upper ends 8a, 8a of the two suspension wires 8, 8, respectively, are formed at positions above the rear end surface 2a of the revolving superstructure 2. ing.
A pin hole 28a is formed in each of the wire fastening portions 28, 28, and a common pin 65 is inserted and removed between the pin hole 28a and the pin hole of the wire upper end 8a, thereby forming the wire upper end 8a. It can be detachably fastened.

Further, on the rear end face 2a of the revolving unit 2, a holding member 72 having a fitting hole 73 for fitting the projecting piece 71 on the revolving unit supporting jack device 5 side from below is provided. As will be described later, when the revolving-body supporting jack device 5 is mounted on the revolving-body rear end portion 2a, the holding member 72 is connected to the connecting portions 55 and 55 of the jack device 5 and the connecting portions 25 and 55 of the revolving-body 2. 25 to prevent the jack device 5 from sticking to the revolving unit 2 in the front-rear direction while the jack device 5 is mounted. 4. As shown in FIG.
In a state in which a and the pin hole 25a of the revolving body side connection portion 25 match each other, the projecting piece 71 on the jack device side is fitted into the fitting hole 73 of the holding member 72 on the revolving body side. still,
The lower end opening of the fitting hole 73 of the holding member 72 is tapered (reference numeral
73a) so that the upper end of the projecting piece 71 can be easily fitted into the fitting hole 73 when the upper cylinder 51 is raised, as described later.

The length of the two suspension wires 8, 8 is such that the lower end 8b of the suspension wire 8 is fixed to the fastening portion 56 on the revolving unit supporting jack device 5 side, and the suspension wire 8 is connected to the wire guide portion. After passing through 57, the upper end of the suspension wire 8
When 8a is fixed to the wire fixing portion 28 on the revolving superstructure 2 side,
In the inoperative state of the vehicle lifting jack devices 13, 13,... (The tires of the vehicle are grounded as shown in FIG. 7), the suspension wires 8 are not tensioned and the revolving body supporting jack devices 5 are not tensioned. When the grounding plate 54 is grounded and the jack-up operation of the vehicle lifting jack devices 13, 13,... (The tire of the vehicle is separated from the ground as shown in FIG. 8), the suspension wire 8 is used. The grounding plate 54 of the revolving unit supporting jack device 5 is set apart from the ground so that the revolving unit supporting jack device 5 is suspended in a vertical posture.

Next, from the crane truck with the telescopic boom and the revolving body shown in FIGS. 1 to 4, the jack device 5 for supporting the revolving body shown in FIGS. A method of using the jack device 13 and the boom support jack device 4 to transfer the telescopic boom and the swing body to another transport vehicle and the operation at that time will be described.

First, as shown in FIG. 7, a revolving body supporting jack device 5 is provided behind the vehicle body 11 by the crane of the crane truck.
Is installed in a state where it is minimized, and a connecting portion 55 provided on the rear end portion 11a of the vehicle body 11 and a connecting portion 55 of the jack device 5 for supporting the revolving body.
8 is connected by stay 17 to revolving body supporting jack device 5
Of the suspension wires 8, 8 in a state in which the telescopic boom 3 is retracted and retracted toward the front of the vehicle 1 (the rear end 2a of the revolving structure 2 faces rearward) while the telescopic boom 3 is held in a vertical position behind the vehicle body. The lower ends 8b, 8b are fastened to the fastening portions 56, 56 on the upper surface of the ground plate 54, respectively, and the hanging wires 8, 8 are guided upward through the wire guides 57, 57, respectively. The upper ends 8a, 8a are fixed to wire fixing portions 28, 28 on the rear end side 2a of the revolving unit 2, respectively.
Also, a hydraulic hose connection on the side of the jack device 5 for supporting the revolving structure.
Hose is connected to 59 from the hydraulic power source of the mobile crane truck. When the attachment of the suspension wires 8, 8 is completed, the stay 17 temporarily holding the revolving-body supporting jack device 5 is removed. Note that the revolving unit supporting jack device 5 is temporarily fixed by the stay 17 by fixing the revolving unit supporting jack device 5 by attaching the hanging wire 8 (to the fixing portion 56 on the ground plate 54 side). Fixing, insertion into the wire guide portion 57, and fixing to the wire fixing portion 28 on the revolving structure 2 side).
The work of temporarily fixing the revolving unit supporting jack device 17 may be omitted. Also, at this time, the boom support jack device 4,
4 is attached to the lower surface of the base end boom 31 separately from the vehicle body 11 side.

Next, as shown in FIG. 8, the jack devices 13, 13,... For pushing up the vehicles are extended to jack up the entire crane truck. At that time, the revolving body supporting jack device 5
The suspension wires 8, 8 are suspended in a vertical position with tension (the grounding plate 54 of the jack device for supporting the revolving unit is separated from the ground at this time). It is designed to rock. In the hanging posture of the revolving body supporting jack device 5, the lower end 8b of the hanging wire 8 is fastened to the fastening portion 56 on the upper surface of the ground plate 54, and the middle portion of the hanging wire 8 is a wire. Guided by the guide part 57 and two hanging wires 8,
Since the revolving body is supported by the jack 8, the jack device 5 for supporting the revolving body is held in a stable posture.

Then, as shown in FIG. 9, when the revolving unit supporting jack device 5 is extended in a state where the revolving unit supporting jack device 5 is suspended and supported by the suspending wires 8, 8,
First, just before the connecting portion 55 on the jack device 5 side reaches the height position of the connecting portion 25 on the revolving body 2 side, the projecting piece 71 on the jack device side engages with the fitting hole 73 of the holding member 72 on the revolving body side (fourth position).
The upper end of the jack device 5 is positioned so as to face the lower end opening of the jack device 5 (see the figure), and when the jack device 5 is further extended, the connecting portions 55, 55 on the jack device 5 side are connected to the connecting portions 25, Now comes to match 25. At this time, if the pin holes 25a, 55a of the connecting portions 25, 55 are misaligned in the front-rear, left-right directions, the entire swinging body supporting jack device 5 is manually swung to align the two. The pin 61 is inserted through the pin holes 25a and 55a, and the revolving unit supporting jack device 5 is mounted on the revolving unit rear end 2a. As described above, since the revolving unit supporting jack device 5 can be attached to the revolving unit rear end portion 2a in a state of being suspended by the suspension wires 8, 8, a special device for supporting the revolving unit supporting jack device 5 is provided. The mounting work can be performed only by the self-extension operation without using the base material (crane).
In addition, when the jack device 5 is mounted, a total of three connecting portions, ie, two connecting portions on the left and right (connecting portions of 25 and 55) and a fitting portion between the projecting piece 71 and the holding member 72 at the upper end of the jack device 5 are provided. , The jack device 5 is held in a stable posture with respect to the revolving unit 2 without being shaken in any of up, down, left, right, front and rear directions.

Next, as shown in FIG. 10, from the state shown in FIG. 9, the revolving-body supporting jack device 5 is slightly reduced in length, and the vehicle lifting jack devices 13, 13,. Ground. At this time, suspending wires 8,8
Has been released from tension, and the suspension wires 8,8
From the revolving unit 2 and the revolving unit supporting jack device 5.

Next, the connection between the turntable 21 on the vehicle body 11 side and the turntable 22 on the revolving superstructure 2 side is released, and the jacks 43, 43 of the boom support jack devices 4, 4 are connected to the vehicle body.
11, the jacks 43, 43 of the boom supporting jack devices 4, 4 and the revolving body supporting jack device 5 are extended, respectively, as shown in FIG. Revolving body 2 with telescopic boom 3 with three-point support
Is lifted upward from the vehicle body 11. Then, move the vehicle 1 to the arrow Y
, The vehicle 1 is pulled out from below the revolving superstructure 2 and the telescopic boom 3.

Subsequently, as shown in FIG. 12, another transport vehicle Z is moved backward to be positioned below the telescopic boom 3 and the revolving unit 2, and then the jacks 43, 43 of the boom support jack devices 4, 4 and the turning are performed. By reducing the body supporting jack device 5, the revolving structure 2 is moved to the thirteenth position.
As shown in the figure, the transport vehicle Z is seated on the carrier, the inner cylinders 42, 42 of the boom support jack devices 4, 4 are reduced to the retracted position, and the revolving unit supporting jack device 5 is If it is removed from the rear end 2a, the work of changing the revolving superstructure 2 with the telescopic boom is completed. In another usage example, when the revolving superstructure 2 with the telescopic boom is mounted on the transport vehicle Z, the revolving superstructure supporting jack device 5 can be left attached to the revolving superstructure 2 without being removed. .

Then, the vehicle 1 of the crane vehicle from which the slewing body with the telescopic boom is removed, and the transport vehicle Z equipped with the slewing body with the telescopic boom.
May be separately moved to the work site, and the work of changing the revolving structure with the telescopic boom in the work site may be performed in reverse order, and the revolving structure with the telescopic boom may be mounted again on the vehicle 1 on the crane vehicle side. .

As described above, by using the attachment device for the jack device for supporting the swinging body shown in the drawing, the work of changing the swinging body with the telescopic boom is easy, and the jacking device 5 for supporting the swinging body 5 is operated by itself (extending operation). The mounting operation of the supporting jack device 5 can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a crane truck according to an embodiment of the present invention,
2 is a plan view of FIG. 1, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, FIG. 4 is an enlarged sectional view taken along the line IV-IV of FIG. 2, and FIG. FIG. 6 is a right side view of FIG. 5, FIG. 7 to FIG.
Drawings are work process diagrams showing a method of attaching and detaching a swing body according to an embodiment of the present invention, FIG. 14 is a side view of a known crane vehicle,
FIG. 15 is an explanatory view of a method of attaching and detaching the revolving superstructure in the crane truck of FIG. DESCRIPTION OF SYMBOLS 1 ... Vehicle 2 ... Revolving body 2a ... Rear end part 3 ... Boom 4 ... Boom supporting jack device 5 ... Revolving body supporting jack device 8 ... Hanging wire 8a ... Upper end 8b ... Lower end 11 ... body 13 ... jack device 25 ... connecting part 28 ... wire fastening part 43 ... jack 51 ... upper cylinder 52 ... lower cylinder 53 ... telescopic device 54 ... ground plate 55 ... connecting part 56… Fixing part 57 …… Wire guide part 61 …… Connecting part (pin)

Claims (1)

(57) [Claims] A boom (3) is mounted on a vehicle (1) which can be jacked up by jack devices (13, 13,...) Provided on both front and rear sides of a vehicle body (11). 2) Removably mount the boom (3) so that the rear end (2a) of the revolving body when the boom (3) is directed forward of the vehicle extends rearward from the rear end (11a) of the vehicle body (11). And a revolving unit supporting jack device (5) for supporting the revolving unit (2) and a boom (3) in a retracted storage state so as to be detachable and straddle the vehicle body (11) in the width direction. A crane truck in which the revolving unit (2) can be lifted up from the upper surface of the vehicle (1) together with the boom (3) by means of a pair of jack devices (4, 4) for supporting the boom mounted on the vehicle. A mounting device for the jack device for supporting the revolving unit, wherein the revolving unit support is provided. Jack device (5) for
The lower cylinder (5) having an upper cylinder (51) and a ground plate (54) at the lower end
2) and a connecting portion (55) formed on the upper cylinder (51) side and a connecting portion (25) formed on the revolving body rear end (2a). ) Can be detachably connected to the revolving body (2) by a connecting tool (61) so that the revolving body (2) can be detachably attached to the revolving body (2). A wire fastening portion (28, 28) for detachably fastening each upper end (8a) of a pair of hanging wires (8, 8) for hanging and holding the body supporting jack device (5) is provided. On the other hand, the lower end (8b) of each of the hanging wires (8, 8) is provided on the left and right sides of the lower cylinder (52) or the ground plate (54) in the revolving body supporting jack device (5). Attachment portions (56, 56) for fastening respectively, and the hanging wires (8, And wire guide portions (57, 57) for guiding the respective suspension wires (8, 8) in the up and down direction, respectively, and further, the length of each of the suspension wires (8, 8) is reduced by the lower end ( 8b) was fixed to the fastening portion (56) on the side of the revolving body supporting jack device (5), and the hanging wires (8, 8) were inserted through the respective wire guide portions (57, 57). Then, when the upper end (8a) of the suspension wire is fixed to the wire fixing portion (28) on the revolving body (2) side, the jack device (13, 13,...) The grounding plate (54) of the revolving body supporting jack device (5) is grounded on the ground and the vehicle lifting jack device (1)
During the jack-up operation of 3,13..., The grounding plate (54) of the revolving unit supporting jack device (5) is separated upward from the ground, and the revolving unit supporting jack device (5) is suspended in a vertical posture. A mounting device for a jack device for supporting a revolving body in a crane truck, wherein the mounting device is set so as to be lowered.