JP2022187524A - crawler crane - Google Patents

Abstract

To provide a crawler crane capable of suppressing the increase of a trailer size and moreover, capable of performing incidental works associated with transportation using multiple jack devices when transporting a car body and a superstructure attached to the car body in one trailer.SOLUTION: In the state that a left-front jack device 60FL and a right-front jack device 60FR are arranged at diagonally forward position where a front beam 61 of the left-front jack device 60FL and the front beam 61 of the right-front jack device 60FR extends diagonally forward left and diagonally forward right from a car body 20, a front axle 30A of a crawler crane 100 has the shape so that a left-front space S1 and a right-front space S2 where a front leg part 62 of the left-front jack device 60FL and the front leg part 62 of the right-front jack device 60FR are arranged respectively, are formed between the front axle 30A and a rear axle 30B.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to crawler cranes.

A crawler crane includes a lower traveling body, an upper revolving body rotatably supported by the lower traveling body, a hoisting member including a boom supported by the upper slewing body so as to be able to rise and fall, and a plurality of jack devices (a plurality of transformers). and a lifter).

In the crawler crane described in Patent Document 1, the lower traveling body includes left and right crawler traveling devices, car bodies, and front and rear car body weights. The upper rotating body is attached to the carbody. The front and rear car body weights are attached to the front and rear parts of the car body, respectively. The car body connects the left and right crawler traveling devices. The plurality of jack devices include two jack devices attached to the front part of the car body with a space in the left-right direction and two jack devices attached to the rear part of the car body with a space in the left-right direction. include.

In the crawler cranes described in each of Patent Documents 2 and 3, the lower traveling body includes left and right crawler traveling devices, a car body, a front axle, and a rear axle. The upper rotating body is attached to the carbody. The front axle is attached to the front of the carbody and the rear axle is attached to the rear of the carbody. Each of the front axle and the rear axle connects the left and right crawler running devices. The plurality of jacking devices includes two front jacking devices attached to the front axle at intervals in the left-right direction, and two rear jacking devices attached to the rear axle at intervals in the left-right direction.

Crawler cranes cannot be self-propelled on public roads, so they are transported by trailer. When a crawler crane is transported, it is dismantled into several parts so that the size of the objects to be transported which form part of the crawler crane is within the limits of transport regulations.

JP 2016-147729 A JP 2016-215744 A JP 2018-39638 A

In the crawler crane described in Patent Literature 1, when the car body and the upper rotating body attached thereto are transported by one trailer, it is difficult to prevent the size of the trailer from increasing. Specifically, it is as follows. Since the upper revolving body has a large front-to-rear dimension, the weight of the upper revolving body inevitably increases. Since the crawler crane described in Patent Document 1 has a structure in which the car body connects the left and right crawler traveling devices, the lateral dimension of the car body is set to a size corresponding to the interval between the left and right crawler traveling devices. be. This causes the weight of the car body to increase. Therefore, in the crawler crane described in Patent Document 1, both the weight of the upper slewing structure and the weight of the car body are large, so it is necessary to use a trailer of a size commensurate with these weights as a trailer for transporting them. There is

The crawler cranes described in Patent Documents 2 and 3 each have a structure in which two front jack devices and two rear jack devices are attached to the front axle and the rear axle, respectively, as described above. The apparatus cannot be used for ancillary work associated with transportation when the upper swing body and carbody are transported on one trailer, and the front axle and rear axle removed from the carbody are transported on another trailer. Specifically, it is as follows. In the crawler cranes described in each of Patent Documents 2 and 3, for example, the work of loading a car body and an upper rotating body attached thereto onto a trailer, the work of unloading them from the trailer, and the work of removing the front axle and the rear axle from the car body. The front and rear axles are removed from the carbody when ancillary operations associated with transportation are performed, such as attaching to the car body. Therefore, it is not possible to perform these incidental operations while jacking up the car body to which the upper revolving structure is attached by four jack devices.

The present disclosure has been made in view of the above problems, and is capable of suppressing an increase in the size of the trailer when the car body and the upper rotating body attached thereto are transported by a single trailer, Moreover, it is an object of the present invention to provide a crawler crane that can perform incidental work associated with transportation using a plurality of jack devices.

The provided crawler crane includes left and right crawler traveling devices that are spaced apart in the left-right direction and extend frontward and rearward, respectively; a front axle that extends in the left-right direction and connects the left and right crawler traveling devices to each other; A rear axle extending in the left-right direction behind the axle and connecting the left and right crawler traveling devices to each other; and a car body disposed between the front axle and the rear axle, wherein the front axle is detachable. and a rear portion to which the rear axle is detachably connected; an upper rotating body attached to the car body so as to be able to rotate; A left front jack device and a right front jack device each having a front beam extending from a base end connected to the car body and a front leg extending vertically supported by the front beam at a tip end of the front beam, respectively. a left front jack device and a right front jack device having a left front jack device and a right front jack device; a left rear jack device and a right rear jack device each having a rear beam extending from a base end portion connected to a body and a rear leg portion extending vertically while being supported by the rear beam at a tip end portion of the rear beam; , the front axle is positioned such that the front beam of the left front jack device and the front beam of the right front jack device extend diagonally forward left and diagonally forward right from the car body, respectively. A left front space and a right front space, which are spaces in which the front leg portion of the left front jack device and the front leg portion of the right front jack device can be respectively arranged in a state where the device and the right front jack device are arranged, are provided in the front. The rear axle is shaped to form an area between the axle and the rear axle, the rear axle being positioned such that the rear beam of the left rear jacking device and the rear beam of the right rear jacking device are positioned to the left of the car body. The rear leg portion and the rear right jack of the left rear jack device are arranged in a state in which the left rear jack device and the right rear jack device are arranged at oblique rear positions extending obliquely rearward and right obliquely rearward, respectively. A left rear space and a right rear space, which are spaces in which the rear legs of the device can respectively be arranged, are defined between the front axle and the rear axle. It has a shape that forms in a region.

In this crawler crane, the front axle has a shape that forms the left front space and the right front space, and the rear axle has a shape that forms the left rear space and the right rear space. Although the front axle and the rear axle that connect the traveling devices to each other extend in the left-right direction so as to lie on the front and rear of the car body, the front leg portions and the rear leg portions of the four jack devices connected to the car body The left front jack device and the right front jack device connected to the car body are arranged at an oblique front position, and the left rear jack device and the right rear jack device connected to the car body are arranged at an oblique rear position so as not to interfere with the arrangement. It is possible to place them in each position. This means that the front axle and the rear axle can be stably jacked up by using two jack devices arranged at an oblique front position and two jack devices arranged at an oblique rear position. It is possible to carry out incidental work associated with transportation such as attaching to the car body, and the weight of the car body is increased by reducing the lateral dimension of the car body without connecting the left and right crawler traveling devices. It is possible to suppress the size of the trailer from becoming large.

In the crawler crane, the front axle includes a front axle body extending in the left-right direction and connecting the left and right crawler traveling devices to each other; a front axle protrusion that is detachably connected to the front portion of the car body, and the front axle protrusion is located between the left crawler traveling device and the front axle protrusion. The dimension in the left-right direction is smaller than the front axle body so that the left front space is formed in the region and the right front space is formed in the region between the right crawler traveling device and the front axle projecting portion. It preferably has a shape. In this configuration, the front axle has a shape in which the front axle protruding portion, which is smaller in lateral dimension than the front axle body, protrudes rearward from the front axle body toward the car body. The front left space and the right front space can be formed on both left and right sides of the front axle protruding portion by disposing the front axle main body at a position spaced forward from the car body without extending the front axle body. Thereby, the left front space and the right front space can be formed while maintaining the size of the car body compact.

In the crawler crane, the rear axle includes a rear axle body extending in the left-right direction and connecting the left and right crawler traveling devices to each other; a rear axle overhang that is detachably connected to the rear portion of the car body, the rear axle overhang being a region between the left crawler traveling device and the rear axle overhang. and the right rear space is formed in the region between the right crawler traveling device and the rear axle projecting portion, the dimension in the left-right direction is larger than that of the rear axle main body. It is preferred to have a small shape. In this configuration, the rear axle has a shape in which the rear axle protruding portion, which is smaller in lateral dimension than the rear axle body, protrudes forward from the rear axle body toward the car body. The left rear space and the right rear space can be formed on both left and right sides of the rear axle protruding portion by disposing the rear axle main body at a position spaced rearward from the car body without extending the rear axle body. Thereby, the left rear space and the right rear space can be formed while keeping the size of the car body compact.

In the crawler crane, each of the left front jack device and the right front jack device rotates about the base end of the front beam with respect to the car body and is displaced from the oblique front position to the front storage position. The front retracted position of the left front jack device and the front retracted position of the right front jack device are a state in which the left front jack device and the right front jack device are arranged at the oblique front position. The front beam of the left front jack device and the front beam of the right front jack device are arranged such that the distance in the left-right direction between the front leg portion of the left front jack device and the front leg portion of the right front jack device is smaller than It is preferable that the positions extend forward or obliquely forward from the car body. In this configuration, when each of the left front jack device and the right front jack device is arranged at the front retracted position, the front beams are arranged so as to extend away from the rear beam from the base ends thereof. Although both the front beam and the rear beam are connected to a compact car body, the left front jack device and the right front jack device are retracted forward from an oblique front position while avoiding the front beam contacting the rear beam. position can be displaced.

In the crawler crane, each of the left rear jack device and the right rear jack device rotates about the base end of the rear beam with respect to the car body to move from the oblique rear position to the rear storage position. The rear retracted position of the left rear jack device and the rear retracted position of the right rear jack device are such that the left rear jack device and the right rear jack device are in the oblique rear position. The rear of the left rear jack device is arranged such that the distance in the left-right direction between the rear leg portion of the left rear jack device and the rear leg portion of the right rear jack device is smaller than in the state in which the rear left jack device is arranged in the It is preferable that the position is such that the beam and the rear beam of the right rear jack device extend rearward or obliquely rearward from the car body. In this configuration, when each of the left rear jack device and the right rear jack device is arranged at the rear retracted position, the rear beams are arranged to extend away from the front beam from the base ends thereof. Therefore, even though both the front beam and the rear beam are connected to the compact car body, the left rear jack device and the right rear jack device can be tilted rearward while avoiding the rear beam contacting the front beam. position to a rear retracted position.

According to the present disclosure, when a car body and an upper rotating body attached thereto are transported by a single trailer, it is possible to suppress an increase in the size of the trailer, and moreover, ancillary work associated with transportation can be performed by four jack devices. A crawler crane is provided that can be performed using

1 is a side view of a crawler crane according to an embodiment of the present disclosure; FIG. Fig. 3 is a plan view showing a car body, a front axle, a rear axle, left and right crawler traveling devices, and four jack devices in the crawler crane; 4 is a side view showing the carbody, the front axle, the rear axle and two jacking devices; FIG. It is a top view for demonstrating arrangement|positioning of the said four jack apparatuses with respect to the said car body. It is a schematic diagram for explaining an example of incidental work accompanying transportation of the crawler crane. It is a schematic diagram for explaining an example of incidental work accompanying transportation of the crawler crane. It is a schematic diagram for explaining an example of incidental work accompanying transportation of the crawler crane. It is a schematic diagram for explaining an example of incidental work accompanying transportation of the crawler crane. It is a schematic diagram for explaining an example of incidental work accompanying transportation of the crawler crane. It is a top view which shows the car body, the front axle, the rear axle, the crawler traveling apparatus on either side, and four jack apparatuses in the crawler crane which concerns on the modified example 1 of the said embodiment. FIG. 9 is a plan view showing a car body, a front axle, a rear axle, left and right crawler traveling devices, and four jack devices in a crawler crane according to Modification 2 of the embodiment;

A crawler crane according to an embodiment of the present disclosure will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the crawler crane 100 includes a lower traveling body 10, an upper revolving body 50, a plurality of jack devices, a hoisting member 70, and a sling 90.

The upper revolving body 50 is supported by the lower traveling body 10 so as to be revolvable about a vertically extending vertical axis (revolving central axis A shown in FIG. 2). The upper revolving body 50 includes a revolving body portion 51 including a revolving frame attached to the lower traveling body 10 , a cabin 52 supported at the front portion of the revolving body portion 51 , and a counter attached to the rear portion of the revolving body portion 51 . It includes a weight 53, a box mast 54 supported by the revolving main body 51 so as to be rotatable around a horizontally extending axis, a hoisting rope 55, a guy line 56, and a hoisting winch device 57.

The hoisting member 70 includes a boom 71 supported by the slewing body 51 of the upper slewing body 50 so as to be hoistable about an axis extending in a horizontal direction perpendicular to the longitudinal direction of the slewing body 51 . The hoisting member 70 may further include a jib (not shown) rotatably connected to the tip of the boom 71 . The hanger 90 is hung from the tip of the undulating member 70 via a rope. The hoisting tool 90 is raised and lowered by a winch device 58 for a hoisted load that can wind up or let out a rope.

The box mast 54 is supported by the revolving main body 51 of the upper revolving body 50 so as to be rotatable in the same direction as the boom 71 . A pair of guy lines 56 are arranged along the left-right direction. The guy line 56 connects the tip of the box mast 54 and the upper end of the boom 71 . A plurality of hoisting ropes 55 are provided between a sheave block including a plurality of sheaves arranged on the revolving main body 51 of the upper revolving body 50 and a sheave block including a plurality of sheaves disposed at the tip of the box mast 54 . It is looped around.

A luffing winch device 57 is located near the box mast 54 . The hoisting winch device 57 winds up and lets out the hoisting rope 55 . Due to the winding operation and the unwinding operation of the hoisting winch device 57, the distance between the sheave block arranged at the tip of the box mast 54 and the sheave block arranged on the revolving body 51 of the upper revolving body 50 changes. , the box mast 54 and the boom 71 are integrally rotated with respect to the revolving main body 51 . The rotation of the box mast 54 is performed, for example, during ancillary work associated with transportation of the crawler crane 100, which will be described later. with respect to the swivel main body 51) is substantially fixed.

The lower traveling body 10 is a crawler-type traveling body capable of self-propelled on the ground. As shown in FIGS. 2 and 3, the undercarriage 10 includes a car body 20, a front axle 30A, a rear axle 30B, and left and right crawler traveling devices 40L and 40R. The directions of “up”, “down”, “front”, “rear”, “left”, and “right” shown in the drawings are based on the orientation of the undercarriage 10 . The direction in which the left and right crawler traveling devices 40L and 40R extend is the front-rear direction, and the horizontal direction perpendicular to the front-rear direction is the left-right direction.

The left and right crawler traveling devices 40L and 40R are arranged with an interval in the left-right direction and have shapes extending forward and backward. The left and right crawler traveling devices 40L and 40R have structures similar to each other except that they have a symmetrical structure. Therefore, one crawler traveling device will be mainly described below. As shown in FIG. 2, the crawler traveling device includes a crawler frame 41 extending in the front-rear direction, front and rear wheels (not shown) rotatably supported by the front and rear ends of the crawler frame 41, and wheels attached to these wheels. It is provided with a crawler belt 42 that is looped and is rotatable, and a driving device (not shown) that drives one of the front and rear wheels. The crawler belt 42 is formed in an annular shape by connecting a large number of crawler shoes. The driving device includes, for example, a motor and a speed reducer (not shown). A driving device drives one of the wheels to cause the crawler belt 42 to circulate. In addition, in FIG. 2, the crawler belts 42, 42 of the left and right crawler traveling devices 40L, 40R are each drawn with a dashed line.

The front axle 30A extends in the left-right direction and couples the crawler frames 41, 41 of the left and right crawler traveling devices 40L, 40R to each other. A left end portion of the front axle 30A is connected to a portion of the left crawler frame 41 on the front side of the center in the front-rear direction, and a right end portion of the front axle 30A is connected to a portion of the right crawler frame 41 on the front side of the center in the front-rear direction. It is connected to the.

The rear axle 30B extends in the left-right direction behind the front axle 30A and couples the crawler frames 41, 41 of the left and right crawler traveling devices 40L, 40R to each other. The left end of the rear axle 30B is connected to a portion of the left crawler frame 41 rearward of the front-rear center, and the right end of the rear axle 30B is rearward of the right crawler frame 41 of the front-rear center. connected to the part of

The carbody 20 is arranged between the front axle 30A and the rear axle 30B. The car body 20 is smaller in lateral dimension than the front axle 30A and the rear axle 30B. The car body 20 includes a car body main body 21 having a rectangular shape in plan view, a turning device 22 arranged on the upper part of the car body main body 21, a front connecting portion 23F arranged on the front side portion of the car body main body 21, 23F, and rear connection portions 23R, 23R arranged in the rear portion of the car body main body 21. As shown in FIG. The front connection portions 23F, 23F are examples of the front portion of the car body 20, and are portions to which the front axle 30A is connected. The rear connection portions 23R, 23R are examples of the rear portion of the car body 20, and are portions to which the rear axle 30B is connected.

An upper rotating body 50 is attached to the car body 20 so as to be able to rotate. The swivel device 22 comprises an outer circle, an inner circle and a swivel motor. One of the outer circle and the inner circle is fixed to the car body main body 21 and the other is fixed to the revolving frame of the upper revolving body 50 . A slewing gear is formed in the inner circle and meshes with a pinion rotated by a slewing motor. By rotating the inner circle with respect to the outer circle by the turning motor, the upper turning body 50 turns with respect to the lower traveling body 10 around the turning center axis A shown in FIG.

The plurality of jack devices are a left front jack device 60FL arranged diagonally leftwardly forward of the turning central axis A, a right frontal jack device 60FR arranged diagonally rightwardly forward of the turning central axis A, and a leftward diagonally rearward of the turning central axis A. and a left rear jack device 60RL arranged on the left rear jack device 60RL and a right rear jack device 60RR arranged obliquely to the right rear of the turning center axis A.

The left front jack device 60FL and the right front jack device 60FR are spaced apart from each other in the left-right direction. Each of the left front jack device 60FL and the right front jack device 60FR has a beam 61 and a leg portion 62 . Each beam 61 of the left front jack device 60FL and the right front jack device 60FR is an example of a front beam, and includes a base end portion 611 connected to the car body main body 21 of the car body 20, a tip end portion 612 on the opposite side, , and has a shape extending obliquely forward from the proximal end 611 to the distal end 612 . The leg portion 62 of each of the left front jack device 60FL and the right front jack device 60FR is an example of a front leg portion, and is supported by the beam 61 at the tip portion 612 of the beam 61 and extends vertically. Each leg 62 of the left front jack device 60FL and the right front jack device 60FR includes a leg body including a cylinder device driven by, for example, a hydraulic mechanism and capable of extending and retracting vertically, and a seat 63 attached to the lower end of the leg body. , and the length in the vertical direction can be changed. The seat portion 63 has a larger area in plan view than the leg main body.

The left rear jack device 60RL and the right rear jack device 60RR are arranged at a distance in the left-right direction behind the left front jack device 60FL and the right front jack device 60FR. Each of the left rear jack device 60RL and the right rear jack device 60RR has a beam 61 and a leg portion 62 . The beams 61 of the left rear jack device 60RL and the right rear jack device 60RR are examples of rear beams, and include a base end portion 611 connected to the car body main body 21 of the car body 20 and a tip end portion 612 on the opposite side. , and has a shape extending obliquely rearward from the proximal end portion 611 to the distal end portion 612 . The leg portion 62 of each of the left rear jack device 60RL and the right rear jack device 60RR is an example of a rear leg portion, and is supported by the beam 61 at the tip portion 612 of the beam 61 and extends vertically. Each leg 62 of the left rear jack device 60RL and the right rear jack device 60RR includes a leg body including a vertically extendable cylinder device driven by, for example, a hydraulic mechanism, and a seat attached to the lower end of the leg body. It has a portion 63 and is capable of changing the length in the vertical direction. The seat portion 63 has a larger area in plan view than the leg main body.

As shown in FIG. 2, the base end portion 611 of the beam 61 of the left front jack device 60FL extends from the turning center axis A at the left end portion of the car body main body 21 so as to be rotatable about a vertically extending turning shaft. is also connected to the front part. A base end portion 611 of the beam 61 of the right front jack device 60FR is connected to a portion on the front side of the turning center axis A at the right end portion of the car body main body 21 so as to be rotatable about a vertically extending turning shaft. ing. The base end portion 611 of the beam 61 of the left rear jack device 60RL is located at the rear side of the turning center axis A at the left end portion of the car body body 21 so as to be rotatable about the vertically extending turning shaft. It is connected. The base end portion 611 of the beam 61 of the right rear jack device 60RR is located at the rear side of the turning center axis A at the right end portion of the car body main body 21 so as to be rotatable around the vertically extending turning shaft. It is connected.

For example, the base end portion 611 of the beam 61 of the right front jack device 60FR has a vertical insertion hole, and the carbody body 21 has a vertical insertion hole at a portion corresponding to the insertion hole of the beam 61 . By disposing the pins 613 shown in FIG. 3 in these insertion holes, the beam 61 is rotatably supported by the car body 20 about the base end portion 611 . The rotating structure of the other three jack devices 60FL, 60RL, and 60RR is the same as that of the right front jack device 60FR.

As shown in FIG. 4, each of the left front jack device 60FL and the right front jack device 60FR rotates about the base end portion 611 of the beam 61 to move between the oblique front position P1 and the front storage position P2. can be displaced by Each of the left rear jack device 60RL and the right rear jack device 60RR can be displaced between the oblique rear position P1 and the rear storage position P2 by rotating around the base end portion 611 of the beam 61. It is possible. The rotation of the four jack devices 60FL, 60FR, 60RL, and 60RR may be performed by an actuator such as a hydraulic cylinder (not shown), or may be manually performed by an operator. Each jack device may be configured to be positioned by a positioning mechanism at each of the oblique front position P1 and the front storage position P2. As the positioning mechanism, a pin inserted through a pin hole provided in each of the beams 61 of the four jack devices 60FL, 60FR, 60RL, and 60RR and a pin hole provided in the car body main body 21 is exemplified. However, the positioning mechanism is not limited to such a form.

The diagonally forward position P1 of the left front jack device 60FL is a position where the beam 61 of the left front jack device 60FL extends diagonally forward left from the left end of the car body main body 21 . The diagonally forward position P1 of the right front jack device 60FR is a position where the beam 61 of the right front jack device 60FR extends diagonally forward right from the right end portion of the carbody main body 21 . The diagonally rear position P1 of the left rear jack device 60RL is a position where the beam 61 of the left rear jack device 60RL extends diagonally rearward left from the left end portion of the car body main body 21 . The diagonally rearward position P1 of the right rear jack device 60RR is a position where the beam 61 of the right rear jack device 60RR extends diagonally rearward right from the right end portion of the carbody main body 21 .

The front retracted position P2 of the left front jack device 60FL and the front retracted position P2 of the right front jack device 60FR are positions such that the beam 61 of the left front jack device 60FL and the beam 61 of the right front jack device 60FR extend forward from the car body body 21, respectively. be. The horizontal distance between the legs 62 of the left front jack device 60FL and the right front jack device 60FR arranged at the front retracted position P2 is the same as the left front jack device 60FL and the right front jack device 60FR arranged at the oblique front position P1. small compared to At the rear retracted position P2 of the left rear jack device 60RL and the rear retracted position P2 of the right rear jack device 60RR, the beam 61 of the left rear jack device 60RL and the beam 61 of the right rear jack device 60RR extend rearward from the car body main body 21, respectively. It is a position like The lateral distance between the leg portions 62 of the left rear jack device 60RL and the right rear jack device 60RR arranged at the rear retracted position P2 is the same as the left rear jack device 60RL and the right rear jack device 60RR arranged at the oblique rear position P1. smaller than it is.

As shown in FIGS. 2 and 3, the front axle 30A includes an axle body 31 (an example of a front axle body) extending in the left-right direction and connecting the left and right crawler traveling devices 40L and 40R to each other; an axle projecting portion 32 (an example of a front axle projecting portion) that projects rearward from 31 toward the car body 20; connecting portions 33, 33 that detachably connect the axle projecting portion 32 to the car body 20; Prepare. That is, the axle projecting portion 32 of the front axle 30A is detachably connected to the front portion of the car body 20 via the connecting portions 33,33. The connecting portions 33, 33 of the front axle 30A are arranged at sites corresponding to the front connecting portions 23F, 23F of the car body 20. As shown in FIG.

Similarly, the rear axle 30B includes an axle body 31 (an example of a rear axle body) extending in the left-right direction and connecting the left and right crawler traveling devices 40L and 40R to each other, and an axle body 31 extending from the axle body 31 toward the car body 20. An axle overhanging portion 32 (an example of a rear axle overhanging portion) projecting forward, and connection portions 33 , 33 detachably connecting the axle overhanging portion 32 to the car body 20 are provided. That is, the axle projecting portion 32 of the rear axle 30B is detachably connected to the rear portion of the car body 20 via the connecting portions 33,33. The connecting portions 33, 33 of the rear axle 30B are arranged at portions corresponding to the rear connecting portions 23R, 23R of the car body 20. As shown in FIG.

Each of the connecting portions 33, 33 of the front axle 30A includes a pair of protruding pieces that protrude rearward from the rear portion of the axle overhang portion 32 of the front axle 30A. Each of the front connecting portions 23</b>F, 23</b>F of the car body 20 includes a protruding piece that protrudes forward from the front portion of the car body main body 21 . A pair of projecting pieces of the connecting portion 33 of the front axle 30A are arranged with a gap in the left-right direction, and the projecting piece of the front connecting portion 23F of the car body 20 is inserted into this gap. A rod-shaped member 81 is joined to the upper portion of the pair of projecting pieces of the connecting portion 33 of the front axle 30A, and extends across the pair of projecting pieces. A notch 82 is formed into which the rod-shaped member 81 can be fitted. Each protruding piece is provided with a through hole. The pin 80 is inserted into these through-holes in a state in which the rod-like member 81 is arranged in the notch 82 and the through-holes are aligned with each other. The front axle 30A is thereby connected to the carbody 20 . The front axle 30A can be removed from the carbody 20 by pulling out the pin 80 from the through hole. The structure of the connecting portions 33, 33 of the rear axle 30B and the structure of the rear connecting portions 23R, 23R of the car body 20 are the same as the connecting portions 33, 33 of the front axle 30A and the front connecting portions 23F, 23F of the car body 20 described above. is.

As shown in FIG. 2, the front axle 30A is configured such that the leg portion 62 of the left front jack device 60FL and the leg portion 62 of the right front jack device 60FR are positioned in a state in which the left front jack device 60FL and the right front jack device 60FR are arranged at the oblique front position P1. It is shaped to form a left front space S1 and a right front space S2, respectively, which can be arranged in the area between the front axle 30A and the rear axle 30B. Similarly, in the rear axle 30B, the leg portion 62 of the left rear jack device 60RL and the leg portion 62 of the right rear jack device 60RR are placed in a state in which the left rear jack device 60RL and the right rear jack device 60RR are arranged at the oblique rear position P1. It is shaped to form a left rear space S3 and a right rear space S4, respectively, which can be arranged in the area between the front axle 30A and the rear axle 30B.

Specifically, it is as follows. Each of the axle body 31 of the front axle 30A and the axle body 31 of the rear axle 30B has a shape extending linearly (rectangular in plan view) as shown in FIG. 2, for example. Each of the axle protruding portion 32 of the front axle 30A and the axle protruding portion 32 of the rear axle 30B has a rectangular box shape in plan view as shown in FIGS. 2 and 3, for example. The shape of the axle projecting portion 32 is not limited to the specific examples shown in FIGS. The center of the axle overhang 32 of the front axle 30A in the left-right direction substantially coincides with the center of the axle main body 31 of the front axle 30A in the left-right direction. Although the center of the axle 30B in the left-right direction of the axle body 31 is substantially aligned, the positions of the centers may be slightly shifted in the left-right direction.

Axle projecting portion 32 of front axle 30A has left front space S1 formed between left crawler traveling device 40L and axle projecting portion 32 of front axle 30A. The front axle 30A has a smaller dimension in the lateral direction than the axle body 31 so that a right front space S2 is formed in the region between the front axle 30A and the axle projecting portion 32 of the front axle 30A. The axle overhang portion 32 of the rear axle 30B has a left rear space S3 formed between the left crawler traveling device 40L and the axle overhanging portion 32 of the rear axle 30B. The rear axle 30B has a shape with a lateral dimension smaller than that of the axle main body 31 so that a right rear space S4 is formed in the region between the rear axle 30B and the axle projecting portion 32 . Each space S is a portion surrounded by a two-dot chain line square in FIG.

In the specific example shown in FIG. 2, the lateral dimensions of the axle overhangs 32 of the front axle 30A and the rear axle 30B are substantially the same as the lateral dimensions of the car body main body 21 of the car body 20. It may be smaller than the horizontal dimension of the main body 21 or larger than the horizontal dimension of the car body main body 21 .

The left front space S1 is formed forward of the car body main body 21 and leftward of the turning center axis A. As shown in FIG. The right front space S2 is formed to the front of the car body body 21 and to the right of the turning center axis A. As shown in FIG. The left rear space S3 is formed to the rear of the car body body 21 and to the left of the turning center axis A. As shown in FIG. The right rear space S4 is formed to the rear of the car body main body 21 and to the right of the turning center axis A. As shown in FIG.

The left front space S1 may be formed to the front of the car body 20 and to the left of the car body 20, and the right front space S2 may be formed to the front of the car body 20 and to the right of the car body 20. The left rear space S3 may be formed to the rear of the car body 20 and to the left of the car body 20, and the right rear space S4 may be formed to the rear of the car body 20 and to the left of the car. It may be formed on the right side of the body 20 .

When the left front jack device 60FL and the right front jack device 60FR are arranged at the oblique front position P1, the leg portion 62 of the left front jack device 60FL is arranged in a region that occupies at least a part of the left front space S1, and the right front jack device 60FR. The leg portion 62 is arranged in a region that occupies at least part of the right front space S2. Similarly, when the left rear jack device 60RL and the right rear jack device 60RR are arranged at the oblique rear position P1, the leg portion 62 of the left rear jack device 60RL is arranged in a region that occupies at least part of the left rear space S3. , and the leg portion 62 of the right rear jack device 60RR is arranged in a region that occupies at least a portion of the right rear space S4.

In the crawler crane 100 according to this embodiment, the front axle 30A has a shape that forms a left front space S1 and a right front space S2, and the rear axle 30B has a shape that forms a left rear space S3 and a right rear space S4. Therefore, the left front jack device 60FL and the right front jack device 60FR connected to the car body 20 are arranged at the oblique front position P1, respectively, and the left rear jack device 60RL and the right rear jack device 60RR connected to the car body 20 are arranged obliquely. Each can be arranged at the rear position P1. This stabilizes the car body 20 and the upper revolving body 50 by using the two jack devices 60FL and 60FR arranged at the diagonally forward position P1 and the two jack devices 60RL and 60RR arranged at the diagonally rearward position P1. The weight of the car body 20 is reduced by reducing the lateral dimension of the car body 20 which does not need to be connected to the left and right crawler traveling devices 40L and 40R. to suppress the increase in the size of the trailer.

In this embodiment, the front axle 30A has a shape in which the axle projecting portion 32, which is smaller in lateral dimension than the axle body 31, projects rearward from the axle body 31 toward the car body 20. Without extending the axle 20 forward, the axle body 31 can be arranged forwardly away from the car body 20 to form a left front space S1 and a right front space S2 on both left and right sides of the axle projecting portion 32.例文帳に追加As a result, the front left space S1 and the front right space S2 can be formed while maintaining the size of the car body 20 compact.

In this embodiment, the rear axle 30B has a shape in which the axle projecting portion 32, which is smaller in lateral dimension than the axle body 31, projects forward from the axle body 31 toward the car body 20. Without extending the axle 20 rearward, the axle body 31 can be arranged at a position spaced rearward from the car body 20 to form a left rear space S3 and a right rear space S4 on both left and right sides of the axle projecting portion 32. can. Thereby, the left rear space S3 and the right rear space S4 can be formed while maintaining the size of the car body 20 compact.

In this embodiment, when the left front jack device 60FL and the right front jack device 60FR are respectively arranged at the front storage position P2, these beams 61 extend from the base end portion 611 to the beam 61 of the left rear jack device 60RL and the right rear jack device 60RL. They are arranged to extend away from the beam 61 of the device 60RR. As a result, although the beams 61 of the four jacking devices 60FL, 60FR, 60RL, and 60RR are connected to the compact car body 20, the beams 61 of the front left jacking device 60FL and the front right jacking device 60FR are connected to the rear left jacking device. The left front jack device 60FL and the right front jack device 60FR can be displaced from the oblique front position P1 to the front storage position P2 while avoiding contact with the beam 61 of the 60RL and the right rear jack device 60RR.

In this embodiment, when the left rear jack device 60RL and the right rear jack device 60RR are respectively arranged at the rear storage position P2, these beams 61 extend from the base end portion 611 to the beam 61 of the left front jack device 60FL and the right front jack device 60FL. They are arranged to extend away from the beam 61 of the device 60FR. As a result, although the beams 61 of the four jacking devices 60FL, 60FR, 60RL, and 60RR are connected to the compact car body 20, the beams 61 of the left rear jacking device 60RL and the right rear jacking device 60RR are connected to the left front jack. The left rear jack device 60RL and the right rear jack device 60RR can be displaced from the oblique rear position P1 to the rear storage position P2 while avoiding contact with the beam 61 of the device 60FL and the right front jack device 60FR.

By arranging the four jack devices 60FL, 60FR, 60RL, and 60RR at the storage position P2, the width of the object to be transported including the carbody 20, the upper rotating body 50, and the four jack devices 60FL, 60FR, 60RL, and 60RR is reduced. can be kept within the range of regulation values for transportation.

In the present embodiment, the front axle 30A and the rear axle 30B connect the left and right crawler traveling devices 40L and 40R to each other. It is possible to increase the distance (distance in the front-rear direction) from the connected part. This is advantageous in terms of the strength of the crawler frame 41, and the weight of the crawler frame 41 can be reduced. Further, since the crawler crane 100 includes the front axle 30A and the rear axle 30B, car body weights can be omitted. Also, even if a car body weight is required, the car body weight can be reduced.

[Incidental work associated with transportation]
5 to 9 are schematic diagrams for explaining an example of incidental work associated with transportation of the crawler crane 100. FIG. The incidental work described below includes the work of unloading the object to be transported from the trailer 110 and the work of attaching the front axle 30A, the rear axle 30B, and the left and right crawler traveling devices 40L, 40R to the car body 20. The objects to be transported include the carbody 20, at least part of the upper rotating body 50, and four jack devices 60FL, 60FR, 60RL, 60RR.

FIG. 5 shows a state in which the objects to be transported are loaded on the trailer 110 . The trailer 110 includes a cabin 111 having a seat on which a driver sits, and a loading platform 112 connected to the rear of the cabin 111 . The object to be transported is placed on a platform 112 . When the transport object is transported by the trailer 110, the four jacking devices 60FL, 60FR, 60RL, 60RR are arranged at the storage position P2.

FIG. 6 shows that the trailer 110 has arrived at a transport destination, such as a work site, and the ancillary work has started. In this auxiliary work, first, the positions of the four jack devices 60FL, 60FR, 60RL, and 60RR are changed from the retracted position P2 to the oblique position P1, and then the leg portions 62 of the jack devices 60 are extended to extend the legs. The seat portion 63 of the portion 62 is grounded, and the carbody 20 and the upper rotating body 50 are lifted from the loading platform 112 of the trailer 110 . In this state, the object to be transported is unloaded from the trailer 110 by moving the trailer 110 forward. 5 and 6, the objects to be transported by the trailer 110 are the car body 20, the revolving body 51 and box mast 54 of the upper revolving structure 50, and four jack devices 60FL, 60FR, and 60RL. , 60RR. However, the box mast 54 may not be included in the transport object. In this case, the object to be transported is transported to the destination by the trailer 110 with the box mast 54 removed from the swivel main body 51, and after the object to be transported is unloaded from the trailer 110 at the destination, the box mast 54 is removed. It may be attached to the turning body portion 51 .

7 shows the operation of attaching the front axle 30A to the car body 20, and FIG. 8 shows the operation of attaching the crawler traveling device 40L to the car body 20. As shown in FIG. These operations are carried out while adjusting the orientation of the upper rotating body 50 with respect to the car body 20 while the car body 20 and the upper rotating body 50 are supported by the four jack devices 60FL, 60FR, 60RL, and 60RR. and using ropes 55 for hoisting. When these operations are completed, the leg portions 62 of the four jack devices 60FL, 60FR, 60RL and 60RR are contracted as shown in FIG. 9, thereby grounding the left and right crawler traveling devices 40L and 40R. Note that the objects to be transported by the trailer 110 may further include the cabin 52 of the upper rotating body 50 . In this case, the object to be transported is transported to the destination by the trailer 110 as shown in FIG. Then, as shown in FIG. 8, the front axle 30A and the left and right crawler traveling devices 40L and 40R are attached to the car body 20. Then, as shown in FIG.

The present disclosure is not limited to the embodiments described above. The present disclosure includes, for example, the following aspects.

(A) Shapes of Front Axle and Rear Axle In the above-described embodiment, the axle bodies 31 of the front axle 30A and the rear axle 30B have a shape (rectangular in plan view) extending linearly in the left-right direction. The axle protruding portions 32 protruding from the axle main bodies 31 of the front axle 30A and the rear axle 30B have a rectangular shape in plan view, but the shapes of the axle main bodies 31 and the axle protruding portions 32 are not limited to those of the above embodiments. . The axle body 31 may include, for example, a bendable portion. The axle projecting portion 32 may have a trapezoidal shape in plan view, as shown in FIG. 10, for example. Further, the axle projecting portion 32 may include a plurality of portions that are spaced apart from each other in the left-right direction, as shown in FIG. 11, for example.

(B) Regarding the Jack Device In the above-described embodiment, each jack device 60 is configured to be displaceable between the diagonal position P1 and the retracted position P2. However, if the width of the object to be transported can be kept within the range of regulation values related to transportation, it may be fixed at the oblique position P1.

Further, in the above-described embodiment, when the left front jack device 60FL and the right front jack device 60FR are arranged at the retracted position P2, these beams 61 extend from the base end portion 611 to the beam 61 of the left rear jack device 60RL and the right rear jack device 60RL. Although they are arranged so as to extend away from the beam 61 of the device 60RR, they extend from the base end 611 in a direction approaching the beam 61 of the left rear jack device 60RL and the beam 61 of the right rear jack device 60RR. may be placed in Similarly, in the above embodiment, when the left rear jack device 60RL and the right rear jack device 60RR are placed at the retracted position P2, these beams 61 extend from the base end 611 to the beam 61 of the left front jack device 60FL and the right front jack device 60FL. Although they are arranged to extend away from the beam 61 of the jack device 60FR, they are arranged to extend from the base end portion 611 in a direction to approach the beam 61 of the left front jack device 60FL and the beam 61 of the right front jack device 60FR. may be placed.

In the above embodiment, the front retracted position P2 of the left front jack device 60FL and the front retracted position P2 of the right front jack device 60FR are such that the beam 61 of the left front jack device 60FL and the beam 61 of the right front jack device 60FR extend forward from the car body 20, respectively. However, the front retracted position P2 may be a position where the beam 61 of the left front jack device 60FL and the beam 61 of the right front jack device 60FR extend obliquely forward from the car body 20, respectively. Similarly, in the above-described embodiment, the rear retracted position P2 of the left rear jack device 60RL and the rear retracted position P2 of the right rear jack device 60RR are such that the beam 61 of the left rear jack device 60RL and the beam 61 of the right rear jack device 60RR are aligned with the car. The rear retracted position P2 is such that the beam 61 of the left rear jack device 60RL and the beam 61 of the right rear jack device 60RR extend obliquely rearward from the car body 20, respectively. position.

20: car body 21: car body main body 23F: front connecting portion (an example of the front portion of the car body)
23R: Rear connection part (an example of the rear part of the car body)
30A: Front axle 30B: Rear axle 31: Axle body 32: Axle overhang 40L: Left crawler running device 40R: Right crawler running device 50: Upper revolving body 60FL: Left front jack device 60FR: Right front jack device 60RL: Left Rear jack device 60RR: Right rear jack device 61: Beam 611: Base end of beam 612: Tip end of beam 62: Leg 100: Crawler crane P1: Oblique front position, oblique rear position P2: Front storage position, rear storage Position S1: Left front space S2: Right front space S3: Left rear space S4: Right rear space

Claims (5)

a crawler crane,
Left and right crawler traveling devices arranged at intervals in the left-right direction and extending in the front-rear direction;
a front axle that extends in the left-right direction and connects the left and right crawler traveling devices to each other;
a rear axle that extends in the left-right direction behind the front axle and connects the left and right crawler traveling devices to each other;
a car body disposed between the front axle and the rear axle, the car body having a front portion detachably connected to the front axle and a rear portion detachably connected to the rear axle;
an upper rotating body pivotably attached to the car body;
A left front jack device and a right front jack device, which are spaced apart from each other in the left-right direction, include a front beam extending from a base end portion connected to the car body, and a front end portion of the front beam supported by the front beam. a left front jacking device and a right front jacking device each having a front leg part that extends upward and downward;
A left rear jack device and a right rear jack device, which are spaced apart from each other in the left-right direction behind the left front jack device and the right front jack device, and extend from a base end portion connected to the car body. a left rear jack device and a right rear jack device each having a rear beam and a rear leg portion that extends vertically while being supported by the rear beam at a tip portion of the rear beam;
The front axle is positioned so that the front beam of the left front jack device and the front beam of the right front jack device extend diagonally forward left and diagonally forward right from the car body, respectively. and a left front space and a right front space, which are spaces in which the front leg portion of the left front jack device and the front leg portion of the right front jack device can be respectively arranged in a state where the right front jack device is arranged, are provided on the front axle. and the rear axle, and
The rear axle is positioned at the left oblique rear position where the rear beam of the left rear jack device and the rear beam of the right rear jack device extend obliquely rearward left and obliquely rearward right from the car body, respectively. A left rear space in which the rear leg portion of the left rear jack device and the rear leg portion of the right rear jack device can be arranged in a state where the rear jack device and the right rear jack device are arranged. A crawler crane shaped to define a space and a right rear space in an area between said front axle and said rear axle. A crawler crane according to claim 1,
The front axle is
a front axle body extending in the left-right direction and connecting the left and right crawler traveling devices to each other;
a front axle projecting portion projecting rearward from the front axle body toward the car body and detachably connected to the front portion of the car body;
The front axle protruding portion has the left front space formed in the region between the left crawler traveling device and the front axle protruding portion, and the region between the right crawler traveling device and the front axle protruding portion. The crawler crane has a shape in which the dimension in the left-right direction is smaller than that of the front axle body so that the right front space is formed on the right side of the crane. A crawler crane according to claim 1 or 2,
The rear axle is
a rear axle body extending in the left-right direction and connecting the left and right crawler traveling devices to each other;
a rear axle projecting portion projecting forward from the rear axle body toward the car body and detachably connected to the rear portion of the car body;
The rear axle protruding portion has the left rear space formed in the region between the left crawler traveling device and the rear axle protruding portion, and the space between the right crawler traveling device and the rear axle protruding portion. A crawler crane having a shape in which the lateral dimension is smaller than that of the rear axle body so that the right rear space is formed in the region. The crawler crane according to any one of claims 1 to 3,
Each of the left front jack device and the right front jack device can rotate relative to the car body about the base end of the front beam to be displaced from the oblique front position to the front retracted position. configured to
The front retracted position of the left front jack device and the front retracted position of the right front jack device are compared to the state in which the left front jack device and the right front jack device are arranged at the oblique front position. The front beam of the left front jack device and the front beam of the right front jack device extend forward or obliquely forward from the car body so that the distance in the left-right direction between the front leg portion and the front leg portion of the right front jack device is reduced. A crawler crane, each in an extended position. The crawler crane according to any one of claims 1 to 4,
Each of the left rear jack device and the right rear jack device can rotate relative to the car body about the base end of the rear beam to be displaced from the oblique rear position to the rear storage position. is configured as
The rear retracted position of the left rear jack device and the rear retracted position of the right rear jack device are different from the state in which the left rear jack device and the right rear jack device are arranged at the oblique rear position. The rear beam of the left rear jack device and the rear beam of the right rear jack device are arranged so that the distance in the left-right direction between the rear leg portion of the rear jack device and the rear leg portion of the right rear jack device is reduced. extends rearwardly or obliquely rearwardly, respectively, from said carbody.

Images