WO2017014043A1 - Counterweight carriage for crane, crane, method for assembling counterweight carriage, and method for manufacturing crane - Google Patents

Abstract

A counterweight carriage is provided with a carriage frame. The carriage frame is provided with: a first frame section having a first wheel unit joining section which can be joined to and separated from a first wheel unit, the first frame section being supported by the first wheel unit so as to be capable of moving with the first wheel unit which has been joined to the first wheel unit joining section; and a second frame section having a second wheel unit joining section which can be joined to and separated from a second wheel unit, the second frame section being supported by the second wheel unit so as to be capable of moving with the second wheel unit which has been joined to the second wheel unit joining section. The second frame section is configured so that the second frame section can be joined to and separated from the first frame section and so that, in a state in which the second frame section is connected to the first frame section, the second wheel unit which has been joined to the second wheel unit joining section is disposed next to the first wheel unit which has been joined to the first wheel unit joining section.

Description

Crane counterweight trolley, crane, counterweight trolley assembly method, and crane manufacturing method

The present invention relates to a crane counterweight carriage, a crane, an assembly method of the counterweight carriage, and a crane manufacturing method.

Conventionally, a counterweight cart that is connected to a crane body to increase the stability of the crane body and improve the crane's lifting capacity is known. The following Patent Document 1 shows an example of such a counterweight carriage.

Patent Document 1 discloses a freight car corresponding to a counterweight carriage. This freight car is connected to the turning structure of the crane body via a nested beam, and can move according to the traveling of the crane body and the turning of the turning structure. The wagon includes a chassis having a support frame connected to a nested beam and on which a counterweight is loaded, and two sets of wheels (wheels) arranged in parallel below the support frame of the chassis and attached to the support frame. Have A freight car moves as the wheel rolls.

The crane may be transported to the work site, etc. At that time, the crane is loaded on a transport vehicle such as a trailer and transported. In this case, in addition to the crane body, a counterweight carriage is also loaded on the transport vehicle and transported. Since the weight of the counterweight carriage is large, it is difficult to carry the entire counterweight carriage as it is on the transportation vehicle because of the limitation of the loading weight of the transportation vehicle. Therefore, it is common to disassemble the counterweight carriage into a plurality of parts and transport each part that has a weight less than the limit of the loading weight, and assemble the transported parts at the destination to form a counterweight carriage. . For example, the frame and wheel of the counterweight carriage are individually transported, and the counterweight carriage is formed by connecting the wheel to the frame at the destination.

However, in the configuration of the freight car (counterweight carriage) disclosed in Patent Document 1, the work related to the connection between the support frame and the wheel becomes complicated and difficult. The reason is as follows.

The support frame of the freight car (counterweight carriage) needs to secure rigidity in order to load a heavy counterweight, and is large and heavy. When the wheels are connected to the support frame, for example, the support frame is lifted and moved by a crane to right above the two sets of left and right wheels installed on the ground, and then the support frame is lowered to each set of wheels. It is conceivable to perform the joining work in the procedure of joining to.

However, in this case, it is necessary to adjust the position of the support frame in a state where the entire support frame is lifted in order to align the connection portion of the support frame and the connection portion of each pair of wheels. Such position adjustment for large and heavy support frames is a difficult task.

As another method, the entire support frame is jacked up on the ground to create a space below it, and the left and right wheels in the space correspond to the distance between them when they are attached to the support frame. It is conceivable to perform the joining work by a procedure of temporarily placing the wheels at intervals and then lifting each pair of wheels and joining the joints of the wheels to the corresponding joints of the support frame.

In this case, it is necessary to jack up the entire support frame, which increases the work process. In addition, after the two left and right wheels are adjusted and temporarily placed so that they are arranged at intervals corresponding to the intervals when the wheels are attached to the support frame, the wheels are lifted and coupled to the support frame. A process is required. This also increases the number of work steps. Further, since it is necessary to lift the wheel so as to avoid the support frame located directly above the wheel, the operation becomes very complicated.

JP 2000-198674 A

An object of the present invention is to facilitate the work related to the coupling between the coupling portion of the frame of the counterweight carriage and the wheel unit.

A counterweight trolley of a crane according to one aspect of the present invention is a counterweight trolley that is connected to a crane body and is movable according to the movement of the crane body, and a first wheel unit having a rotatable first wheel; A second wheel unit having a rotatable second wheel, and a carriage frame that forms a loading surface on which a counterweight is loaded and is detachably coupled to the first wheel unit and the second wheel unit. The bogie frame has a first wheel unit coupling portion detachable from the first wheel unit, and the first wheel unit coupled to the first wheel unit coupling portion is moved by the rotation of the first wheel. A first frame portion supported by the first wheel unit so as to be movable with the first wheel unit when The second wheel unit that has a second wheel unit coupling portion that can be attached to and detached from the second wheel unit and that is coupled to the second wheel unit coupling portion moves when the second wheel unit moves by the rotation of the second wheel. A second frame unit supported by the second wheel unit so as to be movable together with the wheel unit, wherein the second frame unit is detachable from the first frame unit, and the first frame unit The second wheel unit coupled to the second wheel unit coupling portion is arranged side by side with the first wheel unit coupled to the first wheel unit coupling portion. .

A method for assembling a counterweight carriage according to another aspect of the present invention is a method for assembling a counterweight carriage that is connected to a crane body and is movable according to the movement of the crane body, and has a rotatable first wheel. A first wheel unit; a second wheel unit having a rotatable second wheel; a first frame unit having a first wheel unit coupling portion detachably attached to the first wheel unit; and a detachment from the second wheel unit. The second wheel unit coupled to the second wheel unit coupling unit when coupled to the first frame unit, the second wheel unit having a possible second wheel unit coupling unit and detachable from the first frame unit. A cart configuration for preparing a second frame portion configured to be arranged side by side with the first wheel unit coupled to the first wheel unit coupling portion. A material preparing step, a first wheel unit coupling step of lifting the first frame portion and coupling the first wheel unit coupling portion to the first wheel unit, and lifting the second frame portion to the second wheel unit. The first wheel unit is connected to the second wheel unit, and the first wheel unit is connected to the second wheel unit in a state where the first wheel unit and the second wheel unit are arranged side by side. The first frame portion in a state where the first wheel unit is coupled to the first wheel unit coupling portion so that the second wheel unit can be moved by rotation and the second wheel unit can be moved by rotation of the second wheel. And a frame connecting step of connecting the second wheel unit in a state where the second wheel unit is connected to the second wheel unit connecting portion to each other. .

It is a side view of the crane with which the counterweight trolley | bogie by 1st Embodiment of this invention was applied. It is the figure which looked at the counterweight trolley | bogie of the crane shown in FIG. 1 from the rear side. It is a figure which shows the assembly process of the counterweight trolley | bogie by 1st Embodiment. It is a figure which shows the assembly process of the counterweight trolley | bogie by 1st Embodiment. It is a figure which shows the assembly process of the counterweight trolley | bogie by 1st Embodiment. It is a figure which shows the assembly process of the counterweight trolley | bogie by 1st Embodiment. It is a figure which shows the assembly process of the counterweight trolley | bogie by 1st Embodiment. It is a figure which shows the assembly process of the counterweight trolley | bogie by 1st Embodiment. It is the figure which looked at the counterweight trolley | bogie of the crane by 2nd Embodiment of this invention from the rear side. It is the figure which looked at the intermediate frame part of the counterweight trolley | bogie by 2nd Embodiment with the connection beam couple | bonded with the intermediate frame part from the back side. It is the figure which looked at the intermediate frame part of the counterweight trolley | bogie by 2nd Embodiment with the connection beam couple | bonded with the intermediate frame part from the right side. It is the figure which looked at the connection beam by 2nd Embodiment of the state attached to the upper turning body main body of the crane main body from the right side. It is an exploded view of an intermediate frame part. It is a figure which shows the assembly process of the crane by 2nd Embodiment. It is a figure which shows the assembly process of the crane by 2nd Embodiment. It is a figure which shows the assembly process of the crane by 2nd Embodiment. It is a figure which shows the assembly process of the crane by 2nd Embodiment. It is a figure which shows the assembly process of the crane by 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, a crane 2 to which a counterweight carriage 1 according to a first embodiment of the present invention is applied will be described with reference to FIG. Hereinafter, the counterweight carriage 1 is simply referred to as the carriage 1.

As shown in FIG. 1, the crane 2 includes a crane body 4, a connecting beam 10, and a carriage 1.

The crane body 4 includes a lower traveling body 8, an upper swing body 9, and a swing drive device (not shown).

The lower traveling body 8 is a crawler type and is configured to be capable of self-running.

The upper turning body 9 is mounted on the lower traveling body 8 so as to be turnable around the turning axis C1 extending in the vertical direction. The upper swing body 9 includes an upper swing body main body 14, a boom 16, a mast 18, a hanging tool 20, a boom guy line 22, and a carriage guy line 24.

The upper swing body 14 is mounted on the lower traveling body 8 so as to be swingable. The boom 16 is attached to the front end portion of the upper swing body 14 so as to be freely raised and lowered. The hanging tool 20 is suspended from the tip of the boom 16. The hanging tool 20 is for hanging a suspended load during the hanging work by the crane 2.

The mast 18 is attached to the upper swing body 14 so as to be rotatable around a horizontal axis with the base end (lower end) as a fulcrum at a rear position of the boom 16. The tip (upper end) of the mast 18 is connected to the tip of the boom 16 via a boom guy line 22. Thereby, the mast 18 supports the boom 16 in an upright state via the boom guy line 22 from the rear. The tip of the mast 18 is connected to the carriage 1 via a carriage guy line 24.

The “front side” of the upper swing body 9, the connecting beam 10, and the carriage 1 means the side of the upper swing body 9 where the boom 16 is provided. The “rear side” regarding the upper swing body 9, the connecting beam 10, and the carriage 1 means the opposite side to the side on which the boom 16 is provided. The “right side” with respect to the upper swing body 9, the connecting beam 10, and the carriage 1 is a case where the upper swing body 9, the connecting beam 10, and the carriage 1 are viewed from the rear side to the front side in an integrated state. Means the right side of The “left side” regarding the upper swing body 9, the connection beam 10, and the carriage 1 is the left side when the upper swing body 9, the connection beam 10, and the carriage 1 are viewed together from the rear side to the front side. Means.

An unillustrated turning drive device is provided in the upper turning body main body 14 to drive the upper turning body main body 14 around the turning axis C1.

The connecting beam 10 connects the upper swing body 9 (upper swing body 14) and the carriage 1. The connecting beam 10 is coupled to the rear portion of the upper swing body main body 14 and is disposed at the approximate center of the upper swing body main body 14 in the front-rear direction of the upper swing body main body 14 and the lateral width direction orthogonal to the swing axis C1. Yes. The connecting beam 10 has a beam shape that protrudes from the rear end of the upper swing body 14 and extends rearward along the front-rear direction of the upper swing body 14. The connecting beam 10 is configured to be extendable and contractable in the longitudinal direction (the longitudinal direction of the upper swing body 14).

The cart 1 according to the first embodiment is connected to the crane body 4 (upper turning body 9) of the crane 2 having the above-described configuration and moves the crane body 4 (travel of the crane body 4 and upper turning body). 9). The cart 1 has a function of increasing the stability of the crane body 4 and increasing the lifting capacity of the crane 2. Hereinafter, the cart 1 according to the first embodiment will be described in detail.

The cart 1 is disposed at a position away from the upper swing body 14 to the rear of the upper swing body 14. The carriage 1 is connected to the distal end portion of the mast 18 through the carriage guideline 24 (see FIG. 1) as described above with the counterweight 27 (see FIG. 1) loaded thereon, and the connecting beam 10 Via the rear part of the upper swing body 14. As a result, the carriage 1 increases the stability of the crane 2 by balancing the suspension load applied to the front portion of the upper swing body 9 during the suspension operation, the load of the boom 16, and the like, thereby increasing the suspension capacity of the crane 2. . The carriage 1 is configured to be capable of self-propelling, and is movable in accordance with the movement of the crane body 4, that is, the traveling by the lower traveling body 8 of the crane body 4 and the turning of the upper revolving body 9 about the turning axis C <b> 1. Yes.

As shown in FIG. 2, the cart 1 includes a right wheel unit 28, a left wheel unit 29, a cart frame 30, a right wheel steering device (not shown), a left wheel steering device (not shown), And a jack device 33 (see FIGS. 1 and 2). FIG. 2 shows the carriage 1 with the counterweight 27 removed. The right wheel unit 28 is an example of a first wheel unit in the present invention. The left wheel unit 29 is an example of a second wheel unit in the present invention.

The right wheel unit 28 and the left wheel unit 29 are arranged side by side in the left-right width direction of the upper swing body 14. Specifically, when the cart 1 is viewed from the rear side toward the front side, the right wheel unit 28 is disposed on the right side with respect to the center of the cart 1 in the left-right direction, and on the left side with respect to the center of the cart 1 in the left-right direction. A wheel unit 29 is arranged.

The right wheel unit 28 includes a right unit frame 34, a plurality of right wheels 36, and a wheel driving device 38. The right wheel 36 is an example of a first wheel in the present invention.

The right unit frame 34 is attached to the carriage frame 30 so as to be able to turn around a turning axis C2 parallel to the turning axis C1 (see FIG. 1) of the upper turning body 9. By attaching the right unit frame 34 to the carriage frame 30 so as to be able to turn around the turning axis C2, the direction of the right wheel unit 28 can be changed around the turning axis C2. The right unit frame 34 has a coupling portion 34a (see FIGS. 3 to 6) attached to the carriage frame 30 at its upper end. 3 and the subsequent drawings show a state in which the right unit frame 34 (right wheel unit 28) turns 90 ° around the turning axis C2 with respect to the states of FIGS. As shown in FIG. 3, the coupling portion 34 a is composed of four plates that are erected along a substantially vertical direction and are arranged at intervals in a substantially horizontal direction. Each plate body is formed with a through-hole penetrating them in the plate thickness direction (substantially horizontal direction). Among the four plates, the two plates on the right side in FIG. 3 form one set, and the two plates on the left side in FIG. 3 form another set.

The plurality of right wheels 36 (see FIG. 2) are supported by the right unit frame 34 so as to be rotatable around an axis extending in a direction orthogonal to the turning axis C2. The plurality of right wheels 36 are arranged in parallel so as to be coaxial. In the first embodiment, the right wheel unit 28 has four right wheels 36 as the plurality of right wheels 36. Two of the four right wheels 36 are in pairs.

The wheel drive device 38 (see FIG. 2) is a device that rotationally drives a plurality of right wheels 36 around their axes. The wheel drive device 38 includes two hydraulic motors 40 corresponding to the two sets of right wheels 36, and transmits the power generated by each hydraulic motor 40 to the corresponding set of right wheels 36 to drive the right wheels 36 to rotate. To do. When the wheel drive device 38 rotationally drives the right wheel 36, the carriage 1 is self-propelled (moved).

The left wheel unit 29 (see FIG. 2) is configured in the same manner as the right wheel unit 28 except that it does not have a wheel drive device. That is, the left wheel unit 29 includes a left unit frame 42 configured similarly to the right unit frame 34 and a plurality of left wheels 44 configured similar to the plurality of right wheels 36. The left unit frame 42 is attached to the carriage frame 30 so as to be able to turn around a turning axis C3 parallel to the turning axis C1 (see FIG. 1) of the upper turning body 9. The left unit frame 42 includes a coupling portion 42 a configured similarly to the coupling portion 34 a of the right unit frame 34. The left wheel 44 is an example of a second wheel in the present invention.

The bogie frame 30 is supported by a right wheel unit 28 and a left wheel unit 29, on which a counterweight 27 (see FIG. 1) is loaded. That is, the carriage frame 30 forms a loading surface 30a on which the counterweight 27 (see FIG. 1) is loaded.

Specifically, the bogie frame 30 is formed in a substantially rectangular shape that is long in the left-right width direction of the upper swing body 14 when viewed from above. The upper surface of the carriage frame 30 is the loading surface 30a. The cart frame 30 is arranged such that the center in the left-right width direction coincides with the center in the left-right width direction of the upper swing body 14 and the connection beam 10, and is coupled to the connection beam 10 in this state. The carriage frame 30 is detachably coupled to each of the right wheel unit 28 and the left wheel unit 29 disposed below the carriage frame 30. The counterweight 27 (see FIG. 1) is loaded on the carriage frame 30.

The cart frame 30 is configured to be divided into a plurality of parts. Specifically, the carriage frame 30 has a right frame portion 45, a left frame portion 46, and an intermediate frame portion 47. The right frame portion 45 is an example of a first frame portion in the present invention. The left frame portion 46 is an example of a second frame portion in the present invention. The cart frame 30 is configured such that the right frame portion 45, the left frame portion 46, and the intermediate frame portion 47 can be separated from each other. When the cart frame 30 is viewed from the rear side toward the front side, the right frame portion 45 is disposed on the right side, the left frame portion 46 is disposed on the left side, and an intermediate frame is disposed between the right frame portion 45 and the left frame portion 46. A portion 47 is arranged.

The right frame unit 45 is coupled to the right wheel unit 28 and supported by the right wheel unit 28 so that the right wheel unit 28 can move together with the right wheel unit 28 when the right wheel unit 28 is moved by the rotation of the right wheel 36. Part. The right frame portion 45 includes a right frame portion main body 49, a turning portion 51, and a jack mounting portion 52.

The right frame body 49 is formed in a block shape extending in the left-right direction. The right frame portion main body 49 is disposed right above the right wheel unit 28. Two holes 50 (see FIG. 3) are formed on the rear side surface of the left end portion of the right frame portion main body 49 with a space therebetween in the vertical direction. Also, two similar holes are formed on the front side surface (not shown) of the left end portion of the right frame portion main body 49.

The turning part 51 is a part that turns around the turning axis C2 (see FIG. 2) in order to support the right wheel unit 28 and change the direction of the right wheel unit 28. The turning portion 51 is provided at the lower end of the portion near the left end of the right frame portion main body 49. The turning part 51 is supported by the right frame part main body 49 so as to be turnable around the turning axis C2. The turning unit 51 includes a coupling part 34a of the right wheel unit 28 and a detachable right wheel unit coupling part 51a (see FIG. 3). The right wheel unit coupling portion 51a is an example of a first wheel unit coupling portion in the present invention. The right frame unit 45 is supported by the right wheel unit 28 so that the right wheel unit 28 coupled to the right wheel unit coupling unit 51a can move together with the right wheel unit 28 when the right wheel unit 28 moves by the rotation of the right wheel 36. Is done.

The right wheel unit coupling portion 51 a is provided so as to protrude downward from the lower surface of the right frame portion main body 49. The right wheel unit coupling portion 51a is composed of two plates that are spaced apart in a substantially horizontal direction. The two plate bodies are each formed with a through-hole that penetrates them in the plate thickness direction (substantially horizontal direction).

Of the two plates of the right wheel unit coupling portion 51a, the right plate in FIGS. 3 to 6 is inserted between the two plates on the right side of the coupling portion 34a of the right wheel unit 28 in the same drawing. Of the two plates of the right wheel unit coupling portion 51a, the left plate in FIGS. 3 to 6 is inserted between the two plates on the left side of the coupling portion 34a of the right wheel unit 28 in FIG. Yes. One mounting pin 54 is inserted into a through hole formed in one plate of the right wheel unit coupling portion 51a and two plates of the coupling portion 34a inserted between the right wheel unit coupling portion 51a and the right wheel unit coupling portion 51a. By inserting another mounting pin 54 into a through hole formed in the other plate body of the coupling portion 51a and the two plate bodies of the coupling portion 34a inserted therebetween, the right wheel unit 28 is inserted. The coupling portion 34a is coupled to the right wheel unit coupling portion 51a. And each coupling pin 54 can be separated from the right wheel unit coupling portion 51a by pulling out each fitting pin 54 from the through hole in which it is fitted. That is, the coupling portion 34a of the right wheel unit 28 is detachably coupled to the right wheel unit coupling portion 51a. Thus, the right frame portion 45 can be attached to and detached from the right wheel unit 28.

The jack attachment portion 52 is a portion to which the jack device 33 is attached. The right frame portion 45 is provided with two jack mounting portions 52. The two jack attachment portions 52 are provided separately in the front and rear in the vicinity of the right end of the right frame portion main body 49. Each jack mounting portion 52 is provided so as to protrude downward from the right frame portion main body 49.

The left frame portion 46 (see FIG. 2) can be attached to and detached from the right frame portion 45 via the intermediate frame portion 47. In other words, the left frame portion 46 is detachably connected to the right frame portion 45 via the intermediate frame portion 47. The left frame unit 46 is coupled to the left wheel unit 29 and is supported by the left wheel unit 29 so that the left frame unit 29 can move together with the left wheel unit 29 when the left wheel unit 29 moves as the left wheel 44 rotates. Part. The left frame unit 46 is configured so that the left wheel unit 29 is arranged side by side with the right wheel unit 28 attached to the right frame unit 45 in a state of being connected to the right frame unit 45 via the intermediate frame unit 47. Has been.

The left frame portion 46 is configured symmetrically with the right frame portion 45. That is, the left frame portion 46 includes a left frame portion main body 59, a turning portion 61, and two jack attachment portions 62 corresponding to the right frame portion main body 49, the turning portion 51, and the two jack attachment portions 52. The arrangement and configuration of the left frame portion main body 59, the swivel portion 61, and the two jack mounting portions 62 are the same as the arrangement and configuration of the right frame portion main body 49, the swiveling portion 51, and the two jack mounting portions 52 reversed left and right. Equivalent to.

The left frame part main body 59 is disposed right above the left wheel unit 29. Further, two holes 60 (see FIG. 8) are formed on the rear side surface of the right end portion of the left frame portion main body 59 with a space therebetween in the vertical direction. Also, two similar holes are formed in the front side surface (not shown) of the right end portion of the left frame portion main body 59.

The turning portion 61 has a left wheel unit connecting portion 61a that can be attached to and detached from the connecting portion 42a of the left wheel unit 29. The left wheel unit coupling portion 61a is an example of a second wheel unit coupling portion in the present invention. The left frame unit 46 is connected to the right frame unit 45 via the intermediate frame unit 47, and the left wheel unit 29 coupled to the left wheel unit coupling unit 61a is coupled to the right wheel unit coupling unit 51a. The unit 28 is arranged side by side.

The left wheel unit coupling portion 61a has the same configuration as the right wheel unit coupling portion 51a. The left wheel unit coupling portion 61a is separably coupled to the coupling portion 42a of the left wheel unit 29 with the same structure as that of the right wheel unit coupling portion 51a with respect to the coupling portion 34a of the right wheel unit 28. That is, the left wheel unit coupling portion 61 a is pin-coupled to the coupling portion 42 a of the left wheel unit 29 by the mounting pin 64. Since the left wheel unit coupling portion 61a is detachably coupled to the coupling portion 42a, the left frame portion 46 can be attached to and detached from the left wheel unit 29.

The intermediate frame portion 47 (see FIG. 2) is a portion that connects the right frame portion 45 and the left frame portion 46 therebetween. The cart frame 30 is formed by integrating the right frame portion 45 and the left frame portion 46 through the intermediate frame portion 47.

The intermediate frame portion 47 is disposed at the center of the carriage frame 30 in the left-right width direction. The intermediate frame portion 47 includes an intermediate frame portion main body 70, a right frame coupling portion 71, a left frame coupling portion 72, and a lid portion 73.

The intermediate frame portion main body 70 is a block shape that occupies most of the intermediate frame portion 47, and is coupled to the connecting beam 10. The intermediate frame main body 70 has a recess 70 a as a coupled portion coupled to the coupling beam 10. The recess 70a is for receiving the connecting beam 10 therein. The recess 70 a is formed such that the center in the left-right width direction coincides with the center in the left-right width direction of the intermediate frame body 70. The connecting beam 10 is fitted into the recess 70 a, and the lid 73 is fixed to the intermediate frame main body 70 so as to cover the connecting beam 10 from above, so that the intermediate frame main body 70 is fixed to the connecting beam 10. Has been. In this state, the center of the intermediate frame body 70 in the left-right width direction coincides with the center of the connecting beam 10 in the left-right width direction.

The right frame coupling portion 71 is configured to be detachable from the left end portion of the right frame portion 45. The right frame coupling portion 71 is an example of a first frame coupling portion in the present invention. The right frame coupling portion 71 has a pair of right coupling plates 71 a that protrude rightward from the right end of the intermediate frame portion main body 70. One right coupling plate 71a of the pair of right coupling plates 71a is provided at the rear end of the right end surface of the intermediate frame portion main body 70, and projects rightward from the right end surface in parallel with the rear side surface of the intermediate frame portion main body 70. ing. The other right coupling plate 71 a is provided at the front end of the right end surface of the intermediate frame portion main body 70, and protrudes rightward from the right end surface in parallel with the front side surface of the intermediate frame portion main body 70. The right coupling plate 71a provided on the front side is not shown. Each right coupling plate 71a is provided with two insertion holes 71b penetrating in the thickness direction so as to correspond to the two holes 50 (see FIG. 7) of the right frame body 49 with a vertical interval. ing.

The left end portion of the right frame portion main body 49 is inserted between the pair of right connecting plates 71a, and the connecting pins 75 are respectively inserted into the corresponding insertion holes 71b of the right connecting plate 71a and the corresponding holes 50 in the left end portion of the right frame portion main body 49. The right frame coupling portion 71 is coupled to the right frame portion main body 49 by being inserted. The right frame connecting portion 71 can be separated from the right frame portion main body 49 by removing each connecting pin 75. Since the right frame coupling portion 71 is detachably coupled to the right frame portion main body 49, the right frame portion 45 can be attached to and detached from the intermediate frame portion 47.

The left frame coupling portion 72 is configured to be detachable from the right end portion of the left frame portion 46. The left frame coupling portion 72 is an example of a second frame coupling portion in the present invention. The left frame coupling portion 72 includes a pair of left coupling plates 72 a that project leftward from the left end of the intermediate frame portion main body 70. The pair of left side coupling plates 72a are configured symmetrically with the pair of right side coupling plates 71a. Specifically, one left coupling plate 72a of the pair of left coupling plates 72a is provided at the rear end of the left end surface of the intermediate frame portion main body 70, and is parallel to the rear side surface of the intermediate frame portion main body 70 from the left end surface. It protrudes to the left. The other left coupling plate 72 a is provided at the front end of the left end surface of the intermediate frame portion main body 70, and protrudes leftward from the left end surface in parallel with the front side surface of the intermediate frame portion main body 70. The left side coupling plate 72a provided on the front side is not shown. Each left coupling plate 72a is provided with two insertion holes 72b penetrating in the thickness direction so as to correspond to the two holes 60 (see FIG. 7) of the left frame body 59 with a vertical interval. ing.

The right end portion of the left frame portion main body 59 is inserted between the pair of left connecting plate 72a, and the connecting pins 76 are respectively inserted into the corresponding through holes 72b of the left connecting portion 72a and the corresponding holes 60 of the right end portion of the left frame portion main body 59. The left frame connecting portion 72 is connected to the left frame portion main body 59 by being inserted. The left frame connecting portion 72 can be separated from the left frame portion main body 59 by removing each connecting pin 76. The left frame portion 72 is detachably coupled to the left frame portion main body 59 so that the left frame portion 46 can be attached to and detached from the intermediate frame portion 47.

In the intermediate frame 47, the right frame unit 45 in a state where the right wheel unit 28 is coupled to the right wheel unit coupling unit 51a is coupled to the right frame coupling unit 71, and the left wheel unit 29 is coupled to the left wheel unit coupling unit 61a. When the left frame portion 46 in the assembled state is coupled to the left frame coupling portion 72, the right frame so that the right wheel unit 28 and the left wheel unit 29 are movable in a state where they are arranged side by side in the left-right direction. The part 45 and the left frame part 46 are connected between them.

The right wheel steering device (not shown) is a driving device for turning the right wheel unit 28 around the turning axis C2 to change the direction of the right wheel unit 28. The right wheel steering device is provided in the right frame portion main body 49. This right wheel steering device turns the right wheel unit 28 attached to the turning portion 51 around the turning axis C2 by driving the turning portion 51 around the turning axis C2.

The left wheel steering device (not shown) is a drive device for turning the left wheel unit 29 around the turning axis C3 and changing the direction of the left wheel unit 29. The left wheel steering device is provided on the left frame portion main body 59. This left wheel steering apparatus turns the left wheel unit 29 attached to the turning portion 61 around the turning axis C3 by driving the turning portion 61 around the turning axis C3.

When the crane body 4 travels, the right wheel steering device sets the direction of the right wheel unit 28 so that the rolling direction of the right wheel 36 coincides with the traveling direction of the lower traveling body 8 and the left wheel steering device. The direction of the left wheel unit 29 is set so that the rolling direction of the left wheel 44 coincides with the traveling direction of the lower traveling body 8. Further, when turning the upper turning body 9, the right wheel steering device sets the direction of the right wheel unit 28 so that the rolling direction of the right wheel 36 is along the turning direction of the upper turning body 9, and the left wheel steering. The direction of the left wheel unit 29 is set by the device so that the rolling direction of the left wheel 44 is along the turning direction of the upper swing body 9. By setting the directions of the wheel units 28 and 29 as described above, the carriage 1 can move according to the movement of the crane body 4.

The four jack devices 33 are for jacking up and supporting the carriage frame 30. Each jack device 33 includes a hydraulic cylinder that can be expanded and contracted in the vertical direction, and each jack device 33 jacks up the carriage frame 30 as the hydraulic cylinder extends. The four jack devices 33 are arranged at four corners of the bogie frame 30 when viewed from above. Each jack device 33 has a mounted portion 78 at its upper end. The attached portion 78 is a portion to which the corresponding jack attaching portion 52 of the carriage frame 30 is attached. The mounted portion 78 is detachably coupled to the jack mounting portion 52 by being pin-coupled to the corresponding jack mounting portion 52.

The carriage 1 according to the first embodiment having the above-described configuration is disassembled into each component when transported. That is, the carriage 1 is disassembled into the right wheel unit 28, the left wheel unit 29, the right frame part 45, the left frame part 46, the intermediate frame part 47, and the jack devices 33. These components are transported by being loaded on a transport vehicle such as a trailer. At this time, the weight of the component loaded on the transport vehicle is set to be equal to or less than the limit of the load weight of the transport vehicle. That is, the right wheel unit 28, the left wheel unit 29, the right frame unit 45, the left frame unit 46, and the intermediate frame unit 47, which are heavy, are transported separately by transport vehicles. And the trolley | bogie 1 is formed by assembling the conveyed structural member at the transportation destination. Hereinafter, a method for assembling the carriage 1 will be described with reference to FIGS.

First, the right wheel unit 28, the left wheel unit 29, the right frame part 45, the left frame part 46, the intermediate frame part 47, and each jack device 33 are transported and prepared by a transport vehicle. Then, a right wheel unit coupling step is performed in which the right frame unit 45 is lifted and the right wheel unit coupling unit 51 a of the right frame unit 45 is coupled to the coupling unit 34 a of the right wheel unit 28. This right wheel unit coupling step is an example of the first wheel unit coupling step in the present invention.

Specifically, in the right wheel unit coupling step, as shown in FIG. 3, first, the right wheel unit 28 is temporarily placed on the ground, and the right frame unit 45 is lifted by a crane and temporarily placed. Place directly above. Specifically, each plate body of the right wheel unit coupling portion 51a is directly above the corresponding two plate bodies of the coupling portion 34a of the right wheel unit 28 and before and after the through holes formed in each of these plate bodies. The right frame portion 45 is arranged so that the position in the direction is substantially coincident.

Thereafter, the right frame portion 45 is lowered, and each plate body of the right wheel unit coupling portion 51a is inserted between the two plates of the corresponding set of the coupling portion 34a, and through holes formed in the respective plate bodies are inserted. Align the holes. And as shown in FIG. 4, while attaching the attachment pin 54 to the through-hole of each plate body of the right side of coupling | bond part 51a, 34a, another attachment pin 54 is each plate body of the left side of coupling | bond part 51a, 34a. The right wheel unit coupling portion 51a and the coupling portion 34a of the right wheel unit 28 are coupled to each other by being inserted into the through hole. Thereby, the right side frame part 45 and the right side wheel unit 28 are integrated.

Next, as shown in FIG. 5, the right frame unit 45 and the right wheel unit 28 integrated with each other are lifted by a crane, and the jack devices 33 are respectively installed directly below the two front and rear jack mounting portions 52 of the right frame unit 45. To do. Thereafter, the right frame unit 45 and the right wheel unit 28 are lowered together until the right wheel 36 is installed. On the other hand, the two front and rear jack devices 33 are extended so that the front jack mounting portion 52 (not shown) is combined with the mounted portion 78 of the front jack device 33 (not shown) and the rear jack mounting. The portion 52 is combined with the attached portion 78 of the jack device 33 on the rear side. Then, the front jack attaching portion 52 and the attached portion 78 of the front jack device 33 are pin-coupled, and the rear jack attaching portion 52 and the attached portion 78 of the rear jack device 33 are pin-coupled. Thereby, as shown in FIG. 6, the right side frame part 45, the right side wheel unit 28, and the two jack apparatuses 33 are integrated. This integrated unit is referred to as a right cart unit 80.

Next, a left wheel unit coupling step is performed in which the left frame unit 46 is lifted and the left wheel unit coupling unit 61a of the left frame unit 46 is coupled to the coupling unit 42a of the left wheel unit 29. This left wheel unit coupling step is an example of a second wheel unit coupling step in the present invention. Specifically, in the left wheel unit coupling step, the left wheel unit coupling portion 61a of the left frame portion 46 is combined with the coupling portion 42a of the left wheel unit 29, and then attached in the same manner as the right wheel unit coupling step. The left wheel unit coupling portion 61a and the coupling portion 42a are coupled by the pin 64.

Thereafter, the jack devices corresponding to the two jack mounting portions 62 of the left frame portion 46 in the same manner as the step of pin-connecting the jack mounting portion 52 of the right frame portion 45 and the mounted portion 78 of the jack device 33, respectively. 33 to-be-attached portions 78 are pin-coupled. Thereby, the left side frame part 46, the left side wheel unit 29, and the two jack apparatuses 33 are integrated. This integrated unit is referred to as a left cart unit 82 (see FIG. 8).

Next, the rear part of the coupling beam 10 is coupled to the intermediate frame part 47 (see FIG. 7), and the front end part of the coupling beam 10 is coupled to the rear part of the upper swing body 14 (see FIG. 1). The rear part of the connecting beam 10 is coupled to the intermediate frame part 47 by fitting the rear part of the connecting beam 10 into the recess 70a of the intermediate frame part 47, and covering the fitted connecting beam 10 with the cover part 73 and covering the cover part 73 with the cover part 73. This is performed by fixing to the intermediate frame main body 70. The intermediate frame portion 47 is supported from below by the center jack 100 (see FIG. 7).

Next, a frame connecting step of connecting the right frame portion 45 and the left frame portion 46 to each other via the intermediate frame portion 47 is performed. In this frame connecting step, the right frame unit 45 of the right carriage unit 80 and the left side of the left carriage unit 82 are moved so that the right wheel unit 28 and the left wheel unit 29 can move in a state where they are arranged side by side in the left-right direction. The frame part 46 is connected via the intermediate frame part 47.

Specifically, first, a right frame part coupling step of coupling the right frame part 45 of the right cart unit 80 to the right frame coupling part 71 of the intermediate frame part 47 is performed. This right frame portion joining step is an example of a first frame portion joining step in the present invention.

In this right side frame unit joining step, the right side cart unit 80 is lifted by a crane as shown in FIG. Then, the lifted right cart unit 80 is moved, and the left end portion of the right frame portion main body 49 is combined with the right frame coupling portion 71 of the intermediate frame portion 47. Specifically, the left end portion of the right frame portion main body 49 is inserted between the two right connecting plates 71a, and the two insertion holes 71b of the rear right connecting plate 71a and the two rear side surfaces of the right frame portion main body 49 are inserted. The holes 50 are aligned, and the two insertion holes 71b (not shown) of the front right coupling plate 71a and the two holes 50 (not shown) on the front side of the right frame body 49 are aligned. . Then, each right coupling plate 71a and the right frame portion main body 49 are coupled by inserting coupling pins 75 (see FIG. 8) into the respective insertion holes 71b and the corresponding holes 50 respectively. As a result, the right frame portion 45 is coupled to the intermediate frame portion 47 so that they are integrated.

Next, a left frame portion coupling step of coupling the left frame portion 46 of the left cart unit 82 to the left frame coupling portion 72 of the intermediate frame portion 47 is performed. This left frame portion joining step is an example of a second frame portion joining step in the present invention.

In this left frame part joining step, the left cart unit 82 is lifted by a crane as shown in FIG. Then, the lifted left cart unit 82 is moved, and the right end portion of the left frame portion main body 59 is combined with the left frame coupling portion 72 of the intermediate frame portion 47. Specifically, the right end portion of the left frame portion main body 59 is inserted between the two left connecting plates 72a, and the two insertion holes 72b of the rear left connecting plate 72a and the two rear side surfaces of the left frame portion main body 59 are inserted. The holes 60 are aligned, and the two insertion holes 72b (not shown) of the left side coupling plate 72a on the front side and the two holes 60 (not shown) on the front side surface of the left frame portion main body 59 are aligned. . Then, each left coupling plate 72a and the left frame portion main body 59 are coupled by inserting the coupling pins 76 (see FIG. 2) into the respective insertion holes 72b and the corresponding holes 60 respectively. As a result, the left frame portion 46 is coupled to the intermediate frame portion 47 so that they are integrated. Finally, the center jack 100 is removed, and the assembly of the carriage 1 is completed.

In the first embodiment, the right frame unit 45 having the right wheel unit 28 and the detachable right wheel unit coupling portion 51a, and the left frame unit 46 having the left wheel unit 29 and the detachable left wheel unit coupling portion 61a are provided. These can be attached to and detached from each other via the intermediate frame portion 47. For this reason, after the right frame unit 45, the left frame unit 46, the right wheel unit 28, and the left wheel unit 29 are separated and transported, the right frame unit 45 is lifted with respect to the temporarily placed right wheel unit 28. While the right wheel unit coupling part 51a is coupled, the left wheel unit coupling part 61a can be coupled to the temporarily placed left wheel unit 29 by lifting the left frame part 46 separately from the right frame part 45. Thereafter, the right frame portion 45 and the left frame portion 46 are connected via the intermediate frame portion 47 to form the bogie frame 30, and the right wheel unit 28 and the left wheel unit 29 are aligned in the left-right direction. It is possible to assemble a cart 1 in which the unit 28 is movable by the rotation of the right wheel 36 and the left wheel unit 29 is movable by the rotation of the left wheel 44. For this reason, the operation | work which concerns on the coupling | bonding of the trolley | bogie frame 30 and each wheel unit 28 and 29 can be simplified compared with the past.

Specifically, the size and weight of each of the right frame portion 45 and the left frame portion 46 are smaller than the size and weight of the entire bogie frame 30. For this reason, the wheel unit coupling portions 51a and 61a of the frame portions 45 and 46 in the coupling work between the wheel unit coupling portions 51a and 61a of the frame portions 45 and 46 and the coupling portions 34a and 42a of the corresponding wheel units 28 and 29 are performed. Is positioned with respect to the coupling portions 34a and 42a of the corresponding wheel units 28 and 29, the position of the frame portions 45 and 46 is relatively easily adjusted in a state where the frame portions 45 and 46 are individually lifted. be able to.

Moreover, in 1st Embodiment, the jack-up operation | work of the whole trolley | bogie frame like the past, and two sets of wheel units are arrange | positioned by the space | interval corresponding to the space | interval when those wheel units are attached to a trolley | bogie frame. After the position is adjusted and temporarily placed, a complicated process of lifting the wheel units and connecting them to the carriage frame becomes unnecessary. Moreover, the complicated operation | work which lifts a wheel unit so that it may avoid the bogie frame located right above a wheel unit like the past becomes unnecessary. Therefore, in 1st Embodiment, the operation | work which concerns on the coupling | bonding of the trolley | bogie frame 30 and each wheel unit 28 and 29 can be simplified compared with the past.

Further, in the first embodiment, the carriage frame 30 has a right frame coupling portion 71 and a left frame coupling portion 72, and the right frame portion 45 and the left frame coupling portion 72 coupled to the right frame coupling portion 71 are provided. There is an intermediate frame portion 47 that connects the joined left frame portion 46 therebetween. Therefore, the size and weight occupied by the right frame portion 45 and the left frame portion 46 in the carriage frame 30 can be reduced by the amount of the intermediate frame portion 47. As a result, the right and left frame portions 45, 46 are individually arranged to align the wheel unit coupling portions 51a, 61a of the right and left frame portions 45, 46 with the coupling portions 34a, 42a of the corresponding wheel units 28, 29. It is possible to easily adjust the positions of the frame portions 45 and 46 in a state where the frame portions 45 are suspended on the frame.

In the first embodiment, since the right frame portion 45 and the left frame portion 46 that are lighter in weight than the entire bogie frame 30 are individually lifted, a small crane having a relatively small lifting capacity is used as a crane used for the lifting. be able to. For this reason, the cost concerning the assembly work of the cart 1 can be reduced.

(Second Embodiment)
The crane 2 according to the second embodiment of the present invention has the same configuration as the crane 2 of the first embodiment shown in FIG. That is, the crane 2 according to the second embodiment includes the crane body 4, the connecting beam 10, and the carriage 1.

The crane body 4 in the second embodiment is configured similarly to the crane body 4 in the first embodiment.

The connection beam 10 in the second embodiment connects the upper swing body 9 (upper swing body main body 14) and the carriage 1 as the connection beam 10 in the first embodiment. The coupled beam 10 in the second embodiment has the same configuration as the coupled beam 10 in the first embodiment, and more specifically has the following configuration.

The connecting beam 10 is detachable from the upper swing body 9 (upper swing body main body 14) of the crane body 4, and extends substantially horizontally rearward from the upper swing body 9 while being attached to the upper swing body 9. The connecting beam 10 is attached to the rear end portion of the upper swing body 14. Specifically, a front end portion that is one end portion in the longitudinal direction of the connection beam 10 is detachably attached to a rear end portion of the upper swing body 14. The connecting beam 10 is formed in a rectangular tube shape whose cross section perpendicular to the longitudinal direction is a rectangle.

Also, the crane 2 according to the second embodiment includes a position defining portion 120 (see FIG. 12) attached to the connecting beam 10. The position defining portion 120 is an intermediate frame portion main body 70 in the longitudinal direction (front-rear direction) of the connecting beam 10 in a state in which the connecting beam 10 is fitted in a recess 70a of the intermediate frame portion main body 70 (described later) of the carriage 1 (see FIG. ) With respect to the coupled beam 10. The position defining portion 120 has a pair of rear blocking portions 121 and a pair of front blocking portions 122. The pair of rear blocking portions 121 and the pair of front blocking portions 122 are arranged in the longitudinal direction (front-rear direction) of the connecting beam 10. ) Are spaced apart from each other. The rear blocking unit 121 is an example of a first blocking unit in the present invention, and the front blocking unit 122 is an example of a second blocking unit in the present invention.

The pair of rear side blocking portions 121 are disposed on the rear side of the intermediate frame portion main body 70 in a fitted state in which the connecting beam 10 is fitted in the recess 70 a of the intermediate frame portion main body 70, and are connected to the rear side of the intermediate frame portion main body 70. This is to prevent displacement. Of the pair of rear blocking portions 121, one rear blocking portion 121 is attached to the right side surface of the rear portion of the connection beam 10, and the other rear blocking portion 121 is attached to the left side surface of the rear portion of the connection beam 10. (See FIG. 10). Hereinafter, one rear blocking portion 121 attached to the right side surface of the connecting beam 10 is referred to as a right rear blocking portion 121, and the other rear blocking portion 121 attached to the left side surface of the connecting beam 10 is referred to as the left side blocking portion 121. This is referred to as a rear side blocking unit 121.

The right rear blocking portion 121 includes a rear blocking plate 123 and a plurality of reinforcing plates 124.

The rear side blocking plate 123 is disposed so as to face the rear side surface of the intermediate frame body 70 in the fitted state. In this state, the rear blocking plate 123 contacts the rear side surface of the intermediate frame portion main body 70 when the intermediate frame main portion 70 is relatively displaced rearward with respect to the connection beam 10. The relative displacement to the rear side of 70 is prevented. The rear blocking plate 123 is attached to the right side surface so as to protrude rightward from the right side surface of the rear portion of the connecting beam 10. The rear blocking plate 123 has a plate thickness direction that coincides with the longitudinal direction of the coupling beam 10 and extends in a direction (vertical direction) substantially perpendicular to the longitudinal direction of the coupling beam 10 along the right side surface of the coupling beam 10. .

As shown in FIGS. 10 and 11, the rear blocking plate 123 is formed in a curved plate shape so as to slightly swell toward the front side. Specifically, the rear side blocking plate 123 has a shape that is curved so that the central part in the vertical direction is located on the most front side, and toward the rear side from the central part toward both the upper and lower ends. The rear blocking plate 123 has a front side surface 123a that faces the front blocking portion 122 side. The front side surface 123a has a portion that approaches the front side blocking portion 122 side from the lower end toward the upper vertical central portion. The front side surface 123a is an example of a first blocking surface in the present invention.

The plurality of reinforcing plates 124 support and reinforce the rear side blocking plate 123 so that the rear side blocking plate 123 does not fall down. The plurality of reinforcing plates 124 reinforce the rear blocking plate 123 by connecting the rear side surface of the rear blocking plate 123 and the right side surface of the connecting beam 10 positioned on the rear side of the rear blocking plate 123. The plurality of reinforcing plates 124 are arranged at intervals in the vertical direction.

The left rear blocking part 121 (see FIG. 10) is configured symmetrically with the right rear blocking part 121. That is, the left rear blocking portion 121 is configured to be bilaterally symmetric with the rear blocking plate 123 of the right rear blocking portion 121 and has the same function as that of the rear blocking plate 123. The plurality of reinforcing plates 124 of the rear blocking portion 121 and the plurality of reinforcing plates 126 configured symmetrically and having the same function as the reinforcing plate 124 are provided. The rear side blocking plate 125 is attached to the left side surface so as to protrude leftward from the left side surface of the connecting beam 10. The rear blocking plate 125 has a front side similar to the front side 123 a of the rear blocking plate 123. This front side surface is an example of a first blocking surface in the present invention.

The pair of front side blocking portions 122 (see FIGS. 11 and 12) are disposed on the front side of the intermediate frame portion main body 70 in the fitted state, and prevent the intermediate frame portion main body 70 from being displaced to the front side. One front blocking portion 122 of the pair of front blocking portions 122 is attached to the right side surface of the connecting beam 10 at a position spaced forward from the right rear blocking portion 121, and the other front blocking portion 122 (see FIG. Is affixed to the left side surface of the connecting beam 10 at a position spaced forward from the left rear blocking portion 121 (see FIG. 10). Hereinafter, one front blocking portion 122 attached to the right side surface of the connecting beam 10 is referred to as a right front blocking portion 122, and the other front blocking portion 122 attached to the left side surface of the connecting beam 10 is referred to as a left front blocking portion. 122.

The right front blocking portion 122 includes a rear blocking plate 123, a front blocking plate 131 configured to be symmetrical in the front-rear direction, and a plurality of reinforcing plates 132 (see FIG. 11).

The front blocking plate 131 is disposed so as to face the front side surface of the intermediate frame main body 70 in the fitted state. In this state, the front blocking plate 131 contacts the front side surface of the intermediate frame portion main body 70 when the intermediate frame portion main body 70 is displaced relative to the front side with respect to the connecting beam 10 to thereby move the front side of the intermediate frame portion main body 70. Prevent relative displacement to. The front blocking plate 131 is attached to the right side surface so as to protrude rightward from the right side surface of the rear portion of the connecting beam 10. The front blocking plate 131 has a plate thickness direction coinciding with the longitudinal direction of the coupling beam 10 and extends in a direction (vertical direction) substantially perpendicular to the longitudinal direction of the coupling beam 10 along the right side surface of the coupling beam 10.

The front blocking plate 131 is formed in a curved plate shape so as to swell slightly toward the rear side. Specifically, the front blocking plate 131 has a shape in which the vertical center portion is located on the rearmost side and is curved so as to go to the front side from the central portion toward both the upper and lower ends. The front blocking plate 131 has a rear side surface 131a that faces the rear blocking portion 121 side. The rear side surface 131a has a portion that approaches the rear side blocking portion 121 side from the lower end toward the upper vertical center portion on the upper side. The rear side surface 131a is an example of a second blocking surface in the present invention.

The plurality of reinforcing plates 132 support and reinforce the front blocking plate 131 so that the front blocking plate 131 does not fall down. The plurality of reinforcing plates 132 reinforce the front blocking plate 131 by connecting the front side surface of the front blocking plate 131 and the right side surface of the connecting beam 10 positioned on the front side of the front blocking plate 131. The plurality of reinforcing plates 132 are arranged at intervals in the vertical direction.

The left front blocking section 122 (not shown) is configured symmetrically with the right front blocking section 122. That is, the left front blocking portion 122 is configured symmetrically with the front blocking plate 131 of the right front blocking portion 122 and has the same function as that of the front blocking plate 131. It has a plurality of reinforcing plates (not shown) configured symmetrically with the plurality of reinforcing plates 132 of the front blocking portion 122 and having the same function as the reinforcing plate 132. The left front blocking plate is attached to the left side surface so as to protrude leftward from the left side surface of the connecting beam 10. The left front blocking plate has a rear side similar to the rear side 131a of the right front blocking plate 131. This rear side surface is an example of the second blocking surface in the present invention.

The cart 1 in the second embodiment is the same as the cart 1 in the first embodiment. That is, the cart 1 in the second embodiment has the same configuration as the configuration of the cart 1 in the first embodiment.

The bogie frame 30 of the bogie 1 is configured to be divided into a plurality of parts. That is, the bogie frame 30 has a right frame portion 45, a left frame portion 46, and an intermediate frame portion 47 that are configured separately, and the right frame portion 45 and the left frame portion 46 are separated from the intermediate frame portion 47. Each is removable. The intermediate frame portion 47 is disposed at a central position in the left-right direction orthogonal to the longitudinal direction of the connection beam 10. The right frame portion 45 is disposed on the right side of the intermediate frame portion 47 in a state of being coupled to the intermediate frame portion 47 and is supported by the right wheel unit 28 so as to be movable together with the right wheel unit 28. The left frame portion 46 is disposed on the left side of the intermediate frame portion 47 in a state of being coupled to the intermediate frame portion 47, and is supported by the left wheel unit 29 so as to be movable together with the left wheel unit 29.

The intermediate frame portion 47 of the bogie frame 30 in the second embodiment connects the right frame portion 45 and the left frame portion 46 of the bogie frame 30 between them, like the intermediate frame portion 47 in the first embodiment. To do. The intermediate frame portion 47 in the second embodiment has the same configuration as the intermediate frame portion 47 in the first embodiment, and more specifically has the following configuration.

The intermediate frame portion 47 (see FIG. 9) is configured to be detachable from the connection beam 10. The intermediate frame portion 47 is coupled to the connection beam 10 so as to overlap a part of the connection beam 10 in the longitudinal direction of the connection beam 10. As shown in FIG. 13, the intermediate frame portion 47 includes an intermediate frame portion main body 70, a plurality of lid attachment portions 74, a lid portion 73, a right frame coupling portion 71, and a left frame coupling portion 72.

The intermediate frame portion main body 70 is a block shape that occupies most of the intermediate frame portion 47. The intermediate frame main body 70 is formed with a recess 70a (see FIG. 13) that opens upward so as to allow fitting of the connecting beam 10 from above. The recess 70a is a rectangular recess corresponding to the shape of the connecting beam 10 when viewed from the front-rear direction. The recess 70 a is formed so that the center in the left-right width direction coincides with the center in the left-right width direction of the intermediate frame portion main body 70, and is formed from the front end to the rear end of the intermediate frame portion main body 70. The recess 70a is formed to allow the coupling beam 10 to be fitted in a state in which the coupling beam 10 projects rearward from the rear end of the intermediate frame portion main body 70.

The lid attaching portion 74 is for attaching the lid portion 73. The lid attaching part 74 is provided on the upper surface of the intermediate frame part main body 70. In the second embodiment, the lid attaching portion 74 is composed of four plate-like protrusions 74a. Two of the four protrusions 74a are provided on the upper surface of the intermediate frame body 70 positioned on the right side of the recess 70a, and the remaining two are provided on the upper surface of the intermediate frame body 70 positioned on the left side of the recess 70a. Is provided. The two protrusions 74a provided on the right side of the recess 70a are arranged separately in the vicinity of the front end and the vicinity of the rear end of the intermediate frame body 70. Similarly, the two protrusions 74a provided on the left side of the recess 70a are also arranged separately in the vicinity of the front end and the vicinity of the rear end of the intermediate frame body 70. Each protrusion 74 a is erected on the upper surface of the intermediate frame main body 70 in such a posture that the plate thickness direction coincides with the left-right width direction of the intermediate frame main body 70. Each projection 74a is formed with a through-hole that penetrates the projection 74a in the plate thickness direction (left-right direction).

As shown in FIG. 10, the lid portion 73 is fixed to the intermediate frame portion main body 70 so as to cover the connecting beam 10 fitted in the concave portion 70 a from above. The lid 73 is detachable from the intermediate frame main body 70. The lid portion 73 includes a lid portion main body 85 and a lid portion coupling portion 86.

The lid body 85 is a portion that covers the connecting beam 10 fitted in the recess 70a from above. The lid body 85 has a width in the left-right direction that is larger than the width in the left-right direction of the connection beam 10 and the recess 70a. A concave portion 85a (see FIG. 13) is formed on the lower surface of the lid body 85 at the center in the left-right direction. The recessed portion 85a is a portion of the connecting beam 10 that is fitted in the recessed portion 70a of the intermediate frame portion main body 70 that protrudes upward from the recessed portion 70a, that is, the intermediate frame portion body of the connecting beam 10 that is fitted in the recessed portion 70a. 70 is a portion into which a portion protruding upward from the upper surface of 70 is fitted. The recess 85a extends in the front-rear direction from the front end to the rear end of the lid body 85. The concave portion 85 a has a shape corresponding to the upper end portion of the rear portion of the connection beam 10.

The lid coupling part 86 is a part coupled to the lid mounting part 74 in order to fix the lid 73 to the intermediate frame body 70. The lid part coupling part 86 is configured to be detachable from the lid attaching part 74. The lid coupling portion 86 has four coupling locations 87 that can be attached to and detached from the four protrusions 74 a of the lid mounting portion 74. Of the four joints 87, two joints 87 are provided separately at the front and rear at the right end of the lid body 85, and are disposed at positions corresponding to the two right projections 74a. The remaining two coupling points 87 are provided separately at the front and rear at the left end of the lid body 85, and are disposed at positions corresponding to the two left protrusions 74a.

Each connecting portion 87 has a pair of plate portions 87a arranged at an interval corresponding to the plate thickness of the protruding portion 74a in the left-right direction. Each plate portion 87a is formed with a through-hole penetrating the plate portion 87a in the left-right direction (plate thickness direction). Corresponding protrusions 74a are inserted between the pair of plate portions 87a of each joint location 87, and the pins 90 are inserted into the through holes respectively formed in the pair of plate portions 87a and protrusions 74a. A pair of plate part 87a and the projection part 74a are couple | bonded. And each coupling | bond part 87 can be isolate | separated from the corresponding projection part 74a by removing the corresponding pin 90 here. As described above, each coupling portion 87 is detachably coupled to the corresponding protrusion 74 a, so that the lid coupling portion 86 can be attached to and detached from the lid mounting portion 74 and the intermediate frame body 70. It becomes removable with respect to.

The crane 2 according to the second embodiment is disassembled into components when transported. Specifically, the connecting beam 10 is removed from the upper swing body 14 and the connecting beam 10 and the carriage 1 are separated from each other, and the carriage 1 is divided into a right wheel unit 28, a left wheel unit 29, and a right frame part. 45, left frame portion 46, intermediate frame portion 47, and jack devices 33. Moreover, the crane main body 4 is decomposed | disassembled into the lower traveling body 8, the upper turning body main body 14, the boom 16, the mast 18, and other each structural member. Then, the disassembled components are loaded on a transport vehicle such as a trailer and transported. At this time, the weight of the component loaded on the transport vehicle is set to be equal to or less than the limit of the load weight of the transport vehicle. Regarding the components of the carriage 1, the right wheel unit 28, the left wheel unit 29, the right frame part 45, the left frame part 46, and the intermediate frame part 47 are transported separately by transport vehicles. Further, the connecting beam 10 is transported separately by a transport vehicle. Then, the transported structural members are assembled at the transport destination to form the crane body 4 and the carriage 1 connected to the upper swing body 14 of the crane body 4 via the connecting beam 10 is formed. Hereinafter, the manufacturing method of this crane 2 is demonstrated.

First, the upper revolving body 14, the lower traveling body 8, the boom 16, the mast 18, and other components of the crane body 4, the right wheel unit 28, the left wheel unit 29, the right frame portion 45, and the left frame, respectively. The components of the carriage 1 such as the portion 46, the intermediate frame portion 47, and the jack devices 33, and the connecting beam 10 are prepared. Then, the crane body 4 is formed by assembling the constituent members of the crane body 4.

Next, while assembling the carriage 1, the operation of connecting the carriage 1 to the upper swing body 14 of the crane body 4 through the connection beam 10 is performed. In this work process, first, a beam combining process for combining the connecting beam 10 to the intermediate frame portion 47 is performed.

In the beam combining step, the intermediate frame portion main body 70 of the intermediate frame portion 47 is temporarily placed on the ground as shown in FIG. Then, the connecting beam 10 is lifted by a crane, and the rear portion of the connecting beam 10 is fitted into the recess 70a of the intermediate frame main body 70 from above (see FIG. 15). Specifically, a portion of the connecting beam 10 positioned between the pair of rear blocking portions 121 and the pair of front blocking portions 122 is fitted into the recess 70a from above. Even when the connecting beam 10 is slightly displaced in the front-rear direction with respect to the intermediate frame part body 70 in a state where the connecting beam 10 is suspended just above the recess 70a before the fitting, the connecting beam 10 is When the connecting beam 10 is lowered and fitted into the recess 70a, the position defining portion 120 guides the connecting beam 10 to the proper fitting position and fits into the recess 70a.

Specifically, when the coupling beam 10 is fitted into the recess 70 a from above, the coupling beam 10 is displaced rearward, and the lower part of the rear side 131 a of the front blocking plate 131 is the upper end of the intermediate frame body 70. When the connecting beam 10 comes into contact with the front end of the front blocking plate 131, the connecting beam 10 moves down along the curved shape of the lower part of the rear side surface 131a of the front blocking plate 131 so that the positional deviation of the connecting beam 10 is corrected. A portion between the front blocking plate 131 and the rear blocking plate 123 of the connecting beam 10 is fitted into the recess 70a while being slightly displaced forward relative to the intermediate frame main body 70. Further, when the connecting beam 10 is fitted into the recess 70 a from above, the connecting beam 10 is displaced forward, and the lower portion of the front side surface 123 a of the rear blocking plate 123 is the rear end of the upper end portion of the intermediate frame body 70. The contact beam 10 is lowered along the curved shape of the lower part of the front side surface 123a of the rear side blocking plate 123, so that the connection beam 10 is moved to the intermediate frame so that the displacement of the connection beam 10 is corrected. A portion between the front blocking plate 131 and the rear blocking plate 123 of the connecting beam 10 is fitted into the recess 70a while being slightly displaced rearward with respect to the main body 70.

Next, the lid portion 73 is lifted by a crane, and the lid portion 73 is put on the portion between the front side blocking plate 131 and the rear side blocking plate 123 of the connecting beam 10 fitted in the recess 70a from above. At this time, the upper end portion of the coupling beam 10 is fitted into the recess 85 a of the lid body 85, and the corresponding protrusion 74 a of the lid mounting portion 74 is provided between the pair of plate portions 87 a of each coupling portion 87 of the lid coupling portion 86. The lid 73 is placed on the connecting beam 10 and the intermediate frame main body 70 from above so as to be inserted. Then, a pin 90 is inserted into the through hole of the pair of plate portions 87a of each coupling portion 87 and the through hole of the projection portion 74a inserted between the pair of plate portions 87a, and the corresponding projection portion corresponds to each coupling portion 87. 74a is coupled. As a result, as shown in FIG. 10, the lid 73 and the intermediate frame main body 70 are coupled to each other to form the intermediate frame 47, and the intermediate frame 47 and the connecting beam 10 are fixed to each other. . That is, the intermediate frame portion 47 and the connecting beam 10 are integrated.

Next, the intermediate frame portion 47 and the connection beam 10 coupled to the intermediate frame portion 47 are integrally lifted by a crane, and the front end portion of the connection beam 10 is connected to the rear end portion of the upper swing body 14 as shown in FIG. A beam attaching process is performed for attaching to the beam. Then, the center jack 100 is installed directly below the intermediate frame portion 47, and the intermediate frame portion 47 is supported from below by the center jack 100.

Next, a right wheel unit coupling step is performed in which the right frame unit 45 is lifted and the right wheel unit coupling unit 51a of the right frame unit 45 is coupled to the coupling unit 34a of the right wheel unit 28. This right wheel unit combining step is the same as the right wheel unit combining step in the first embodiment.

Next, a process in which the right frame unit 45 and the right wheel unit 28 are integrated is lifted with a crane, and the jack device 33 is mounted on the jack mounting unit 52 of the right frame unit 45. This step is the same as the step of attaching the jack device 33 to the jack attachment portion 52 of the right frame portion 45 in the first embodiment. By the mounting step of the jack device 33, the right cart unit 80 (see FIG. 17) in which the right frame portion 45, the right wheel unit 28, and the two jack devices 33 are integrated is manufactured.

Next, a left wheel unit coupling step is performed in which the left frame unit 46 is lifted and the left wheel unit coupling unit 61a of the left frame unit 46 is coupled to the coupling unit 42a of the left wheel unit 29. This left wheel unit coupling step is the same as the left wheel unit coupling step in the first embodiment.

Thereafter, the jack device 33 is attached to the jack attachment portion 62 of the left frame portion 46 in the same manner as the step of attaching the jack device 33 to the jack attachment portion 52 of the right frame portion 45 described above. Thereby, the left cart unit 82 (see FIG. 18) in which the left frame unit 46, the left wheel unit 29, and the two jack devices 33 are integrated is manufactured.

Next, a right frame portion joining step for joining the right frame portion 45 to the intermediate frame portion 47 from the right side, and a left frame portion joining step for joining the left frame portion 46 to the intermediate frame portion 47 from the left side are performed. . The right frame portion joining step in the second embodiment is the same as the right frame portion joining step in the first embodiment. Further, the left frame portion combining step in the second embodiment is the same as the left frame portion combining step in the second embodiment.

As described above, the carriage 1 connected to the upper swing body 14 of the crane body 4 through the connecting beam 10 is formed.

Finally, the center jack 100 is removed, and the bogie frame 30 of the bogie 1 and the tip of the mast 18 of the crane body 4 are connected via the bogie guy line 24.

In the second embodiment, the coupled beam 10 separated from the upper swing body 14 is lifted, and the coupled beam 10 is coupled to the intermediate frame 47 separated from the right frame 45 and the left frame 46, The combined intermediate frame 47 and the connecting beam 10 are lifted integrally to attach the connecting beam 10 to the upper swing body 14, and then the right frame with the right wheel unit 28 connected to the right wheel unit connecting portion 51a. The left frame unit 46 in a state where the left wheel unit 29 is coupled to the left wheel unit coupling unit 61 a is coupled to the left frame coupling unit 72 of the intermediate frame unit 47 while the unit 45 is coupled to the right frame coupling unit 71 of the intermediate frame unit 47. A truck connected to the crane body 4 via a connecting beam 10 by being coupled. A can be formed. For this reason, as a crane having a configuration in which it is necessary to couple the beam so that a part of its longitudinal direction overlaps the intermediate frame part of the frame of the counterweight carriage that is formed integrally as a whole, There is no need to lift and move the entire large and heavy counterweight carriage horizontally.

Moreover, in the said 2nd Embodiment, in order to couple | bond the connection beam 10 with the upper revolving body main body 14 of the crane main body 4, the attachment part of the upper revolving body main body 14 and the front end of the connection beam 10 are carried out by operation | movement or movement of the crane main body 4 itself. It is not necessary to align the connecting beam 10 with the intermediate frame 47 of the carriage 1 by moving the crane body 4 to which the connecting beam 10 is attached. Therefore, the operation | work which concerns on the connection via the connection beam 10 of the upper turning body main body 14 of the crane main body 4 and the trolley | bogie 1 can be facilitated.

Further, in the second embodiment, after the suspended connection beam 10 is aligned with the recess 70a above the recess 70a of the intermediate frame portion main body 70, the connection beam 10 is fitted into the recess 70a only by being lowered. Can do. Therefore, the coupling beam 10 and the intermediate frame portion 47 of the carriage frame 30 are coupled to each other as compared with the conventional configuration in which the beam lifted in a horizontal posture needs to be inserted straight into the insertion hole of the support weight carriage frame. Work can be made easier.

In the second embodiment, the connection beam 10 is a position defining portion that defines the relative position of the intermediate frame portion 47 with respect to the connection beam 10 in the longitudinal direction of the connection beam 10 in a state where the connection beam 10 is fitted in the recess 70a. 120. For this reason, when the coupling beam 10 is fitted into the recess 70a, the position defining portion 120 can define the relative position of the intermediate frame main body 70 with respect to the coupling beam 10 in the longitudinal direction of the coupling beam 10. For this reason, the positioning operation of the relative position of the intermediate frame main body 70 and the connection beam 10 in the longitudinal direction of the connection beam 10 can be simplified.

Moreover, in the said 2nd Embodiment, it has the front side surface 123a which has the part which approaches the front side blocking plate 131 side as the rear side blocking plate 123 of the position prescription | regulation part 120 goes to the upper side from the lower end, The front side blocking plate 131 of the position defining portion 120 arranged at a front interval has a rear side surface 131a having a portion that approaches the rear side blocking plate 123 side from the lower end toward the upper side. Therefore, when the coupling beam 10 is fitted into the recess 70a, the relative position of the intermediate frame body 70 with respect to the coupling beam 10 is changed from the normal position between the rear blocking plate 123 and the front blocking plate 131 to the longitudinal direction of the coupling beam 10. Even when there is a slight shift in the direction (front-rear direction), the portion that approaches the front blocking plate 131 side from the lower end of the front side surface 123a of the rear blocking plate 123 toward the upper side, or the rear side surface of the front blocking plate 131 A portion approaching the rear side blocking plate 123 side as it goes upward from the lower end of 131a comes into contact with the intermediate frame portion main body 70, and the connecting beam is corrected while correcting the displacement of the relative position of the intermediate frame portion main body 70 along the contacted portion. 10 is fitted into the recess 70a. That is, in the second embodiment, it is possible to automatically correct the positional deviation of the intermediate frame body 70 with respect to the connection beam 10 in the longitudinal direction of the connection beam 10 simply by fitting the connection beam 10 into the recess 70a from above. In addition, the adjustment operation of the relative coupling position between the intermediate frame part main body 70 and the connecting beam 10 can be simplified.

In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims, and includes all modifications within the meaning and scope equivalent to the scope of claims.

In the above embodiment, the cart frame 30 can be separated into the right frame portion 45, the left frame portion 46, and the intermediate frame portion 47, but the cart frame according to the present invention is not necessarily limited to such a configuration. . For example, the bogie frame may be separable into a right frame portion to which the right wheel unit is coupled and a left frame portion to which the left wheel unit is coupled. That is, the bogie frame may have a configuration in which the right frame portion and the left frame portion are directly coupled to each other so as to be separated from each other without including the intermediate frame portion.

Further, the coupling structure between the right frame part and the intermediate frame part and the coupling structure between the left frame part and the intermediate frame part are not necessarily limited to those described above.

Further, the coupled portion coupled to the coupling beam in the carriage is not necessarily limited to the concave portion 70a located at the center of the intermediate frame portion 47 in the left-right width direction. That is, various positions and forms different from the concave portion 70a can be adopted as the positions where the coupled parts are provided in the carriage frame and the forms of the coupled parts.

For example, the coupled portion may be provided other than the intermediate frame portion of the bogie frame, or may be provided at a position shifted in the left-right direction from the center in the left-right width direction of the bogie frame.

Further, as a form of the coupled portion, for example, an insertion hole penetrating in an intermediate frame portion of the carriage frame in the front-rear direction may be the coupled portion. That is, the connection beam may be inserted into the insertion hole, and the connection beam may be coupled to the intermediate frame portion in this state.

Further, as long as the carriage 1 is connected to the mast 18 of the crane body 4 via the carriage guy line 24, the carriage 1 does not necessarily have to be connected to the upper swing body 14 via the connection beam 10. In addition, as a connecting portion that connects the crane body 4 and the carriage 1, it is possible to adopt a configuration other than the connecting beam 10.

Also, the cart does not necessarily have to be able to run on its own. That is, the carriage may not be equipped with a wheel drive device, and may be moved by being pulled by the crane body via the connection beam.

[Outline of the embodiment]
The above embodiments are summarized as follows.

The counterweight trolley of the crane according to the embodiment is a counterweight trolley that is coupled to the crane body and is movable according to the movement of the crane body, and a first wheel unit having a rotatable first wheel, A second wheel unit having a possible second wheel; and a carriage frame that forms a loading surface on which a counterweight is loaded and is detachably coupled to the first wheel unit and the second wheel unit, and The bogie frame has a first wheel unit coupling portion that can be attached to and detached from the first wheel unit, and the first wheel unit coupled to the first wheel unit coupling portion moves by the rotation of the first wheel. A first frame portion supported by the first wheel unit so as to be movable together with the first wheel unit; The second wheel unit has a second wheel unit coupling part that can be attached to and detached from the second wheel unit, and the second wheel unit coupled to the second wheel unit coupling part moves by the rotation of the second wheel. A second frame unit supported by the second wheel unit so as to be movable together with the unit, the second frame unit being detachable from the first frame unit, In a connected state, the second wheel unit coupled to the second wheel unit coupling portion is arranged side by side with the first wheel unit coupled to the first wheel unit coupling portion.

Note that the second frame part is detachable from the first frame part is not only that the second frame part is directly detachable from the first frame part, but also the first frame part and the second frame part. Another member is interposed between the frame portion and the other member is detachable from the first frame portion and / or the second frame portion, so that the second frame portion is indirectly attached to the first frame portion. It is a concept that also includes being removable. In addition, the second frame part is connected to the first frame part is not only directly coupled to the first frame part but also other than the first frame part and the second frame part. It is a concept including that the second frame part is indirectly connected to the first frame part via another member.

In this counterweight carriage, the second frame part having the second wheel unit coupling part detachable from the second wheel unit, with respect to the first frame part having the first wheel unit coupling part detachable from the first wheel unit. Is detachable. For this reason, after transporting the first frame part, the second frame part, the first wheel unit and the second wheel unit separated from each other, the first frame part is lifted with respect to the temporarily placed first wheel unit and the first frame part is lifted. The first wheel unit coupling portion of one frame portion is coupled, while the second frame unit is lifted separately from the first frame portion with respect to the temporarily placed second wheel unit, and the second wheel unit coupling of the second frame portion is performed. After the parts are joined, the first frame part and the second frame part can be connected to each other to form a cart frame. As a result, it is possible to assemble a counterweight carriage that can move in a state where the first wheel unit and the second wheel unit are aligned. For this reason, the operation | work which concerns on the coupling | bonding of the wheel unit coupling | bond part of a trolley | bogie frame and each wheel unit can be facilitated compared with the past.

Specifically, in this counterweight cart, the size and weight of each of the first frame portion and the second frame portion are smaller than the size and weight of the entire cart frame. Therefore, in order to align the wheel unit coupling part of each frame unit with the corresponding wheel unit coupling part in the coupling work between the wheel unit coupling part of each frame part and the corresponding wheel unit, each frame part is individually The position of the frame portion can be adjusted relatively easily in the suspended state. Further, in this counterweight carriage, jack-up work for the entire carriage frame as in the prior art, and two sets of wheel units are arranged at intervals corresponding to the intervals when the wheel units are attached to the carriage frame. After the position is adjusted and temporarily placed, a complicated process of lifting the wheel units and connecting them to the carriage frame becomes unnecessary. Moreover, the complicated operation | work which lifts a wheel unit so that the trolley | bogie frame located right above a wheel unit like the conventional may be unnecessary. Therefore, in this counterweight carriage, it is possible to facilitate the work related to the coupling between the wheel unit coupling portions of the carriage frame and the corresponding wheel units as compared with the conventional one.

In the counterweight carriage of the crane, the carriage frame further includes an intermediate frame portion having a first frame coupling portion that can be attached to and detached from the first frame portion and a second frame coupling portion that can be attached to and detached from the second frame portion. The intermediate frame portion is coupled to the first wheel unit coupling portion while the first frame unit coupled to the first wheel unit coupling portion is coupled to the first frame coupling portion and to the second wheel unit coupling portion. When the second frame unit coupled with the second wheel unit is coupled to the second frame coupled unit, the first wheel unit and the second wheel unit are moved side by side, respectively. It is preferable to connect the first frame part and the second frame part between them so as to be possible.

According to this configuration, the size and weight occupied by the first frame portion and the second frame portion in the carriage frame can be reduced by the amount corresponding to the intermediate frame portion. For this reason, in order to align the wheel unit coupling parts of the first and second frame parts with the coupling parts of the corresponding wheel units, the frame parts of the first and second frame parts in the state where they are lifted individually. Position adjustment can be performed more easily.

The method of assembling a counterweight carriage according to the embodiment is a method of assembling a counterweight carriage that is connected to a crane body and is movable according to the movement of the crane body, the first wheel having a rotatable first wheel. A first wheel unit having a unit, a second wheel unit having a rotatable second wheel, a first wheel unit coupling portion removable from the first wheel unit, and a second wheel unit removable from the second wheel unit. The second wheel unit having a two-wheel unit coupling part and detachable from the first frame part and coupled to the second wheel unit coupling part when coupled to the first frame part is the first wheel unit. A cart component for preparing a second frame portion configured to be arranged side by side with the first wheel unit coupled to a wheel unit coupling portion A first wheel unit coupling step for lifting the first frame unit and coupling the first wheel unit coupling unit to the first wheel unit; and a second wheel unit coupling by lifting the second frame unit The first wheel unit rotates the first wheel in a state in which the first wheel unit and the second wheel unit are arranged side by side, and a second wheel unit coupling step for coupling the part to the second wheel unit. The first frame unit in a state in which the first wheel unit is coupled to the first wheel unit coupling unit so that the first wheel unit can be moved by rotation of the second wheel. A frame connecting step of connecting the second wheel unit to the second wheel unit connecting portion to the second frame portion in a state where the second wheel unit is connected to the second wheel unit connecting portion. .

In this method of assembling the counterweight carriage, before the first frame portion and the second frame portion are connected to each other, the first frame portion is lifted and the first wheel unit coupling portion of the first frame portion is used as the first wheel unit. The second frame portion is lifted and the second wheel unit coupling portion of the second frame portion is coupled to the second wheel unit while being coupled to the unit. For this reason, each frame unit having a size and weight smaller than that of the entire bogie frame is individually lifted, and each wheel unit coupling unit of each frame unit is aligned with the coupling unit of each corresponding wheel unit. The position of the frame part can be adjusted individually. Therefore, this position adjustment work can be easily performed as compared with the conventional case where the position is adjusted by lifting the entire carriage frame. Further, in this assembling method, jack-up work for the entire bogie frame as in the past, and two sets of wheel units are arranged at intervals corresponding to the intervals when the wheel units are attached to the bogie frame. After the position is adjusted and temporarily placed, a complicated process of lifting the wheel units and connecting them to the carriage frame becomes unnecessary. Moreover, the complicated operation | work which lifts a wheel unit so that the trolley | bogie frame located right above a wheel unit like the conventional may be unnecessary. Therefore, in this counterweight cart assembly method, it is possible to facilitate work related to the coupling between the wheel unit coupling portions of the cart frame and the corresponding wheel units as compared with the conventional method.

In the counterweight cart assembly method, the cart component preparing step includes a first frame coupling portion that is detachable from the first frame portion and a second frame coupling portion that is detachable from the second frame portion. The first frame unit in a state where the first wheel unit is coupled to the first wheel unit coupling unit is coupled to the first frame coupling unit and the second wheel unit is coupled to the second wheel unit coupling unit. When the second frame part in a state where the two wheel units are coupled is coupled to the second frame coupling part, the first wheel unit and the second wheel unit are movable in a state where they are arranged side by side. An intermediate frame portion for connecting the first frame portion and the second frame portion to each other is further prepared, and the frame connecting step includes the first wheel unit. A first frame unit coupling step for coupling the first frame unit in a state in which the first wheel unit is coupled to a frame coupling unit to the first frame coupling unit of the intermediate frame unit; and the second wheel unit coupling It is preferable that a second frame portion coupling step of coupling the second frame portion with the second wheel unit coupled to the portion to the second frame coupling portion of the intermediate frame portion.

According to this configuration, the size and weight occupied by the first frame portion and the second frame portion are reduced by the amount corresponding to the intermediate frame portion. Therefore, in order to align the wheel unit coupling portions of the first and second frame portions with the corresponding wheel unit coupling portions, the positions of the frame portions in the state where the first and second frame portions are individually lifted. Adjustment can be made more easily.

In addition, the crane according to the embodiment includes a counterweight bogie having a structure in which the bogie frame includes an intermediate frame portion that connects the first frame portion and the second frame portion therebetween, a crane main body, and the crane main body. And a connecting beam extending rearward from the crane body in a state of being attached to the crane body, the counterweight carriage is connected to the crane body via the connection beam, and the intermediate The frame part is detachable from the connection beam and is coupled to the connection beam so as to overlap a part of the connection beam in the longitudinal direction of the connection beam, and the first frame part is coupled to the intermediate frame part In the left and right direction perpendicular to the longitudinal direction of the connection beam, And is supported by the first wheel unit so as to be movable together with the first wheel unit, and the second frame part is connected to the intermediate frame part in the left-right direction in a state of being coupled to the intermediate frame part. On the other hand, it is arranged on the opposite side to the first frame part and is supported by the second wheel unit so as to be movable together with the second wheel unit.

In this crane, the connecting beam is detachable from the crane body, and the carriage frame is detachably attached to the connecting beam and is coupled to the connecting beam so as to overlap a part of the connecting beam in the longitudinal direction of the connecting beam. An intermediate frame portion, a first frame portion that is detachably attached to the intermediate frame portion and is disposed on one side in the left-right direction in a state of being coupled to the intermediate frame portion and supported by the first wheel unit, and the intermediate frame portion And a second frame portion disposed on the opposite side of the first frame portion with respect to the intermediate frame portion in the left-right direction in a state of being coupled to the intermediate frame portion and supported by the second wheel unit. Have. Therefore, either one of the connection beam and the intermediate frame is lifted and coupled to the other, and the combined connection beam and the intermediate frame are separated from the first and second frame units and the first and second wheel units. It is possible to attach the connecting beam to the crane body by lifting it in this state. Thereafter, the first wheel unit and the first frame part can be integrally lifted and coupled to the intermediate frame part, and the second wheel unit and the second frame part can be integrally lifted and coupled to the intermediate frame part. For this reason, in this crane, like the crane of the structure which needs to couple | bond a connection beam so that the one part of the longitudinal direction may overlap with the intermediate frame part of the counterweight trolley currently formed integrally. It is not necessary to lift and move the entire counterweight carriage, which is very large and heavy, in the horizontal direction. Moreover, in this crane, in order to connect the attachment part of a crane main body to a connection beam, it is not necessary to align an attachment part with respect to a connection beam by operation | movement or movement of the crane main body itself, and the crane after attaching a connection beam It is not necessary to couple the connecting beam to the intermediate frame portion of the counterweight carriage so that a part of the connecting beam in the longitudinal direction overlaps with the movement of the main body itself. For this reason, the operation | work which concerns on the connection via the connection beam of a crane main body and a counterweight trolley | bogie can be facilitated.

In the crane, the intermediate frame portion is detachable from the intermediate frame portion main body having an indented portion opened upward so as to allow fitting of the connecting beam from above, and the intermediate frame It is preferable to have a lid portion that covers and fixes the connecting beam fitted in the concave portion while being coupled to the main body.

According to this configuration, after the suspended connection beam is aligned with the recess above the recess of the intermediate frame main body, the connection beam can be fitted into the recess just by lowering, and then connected with the lid. The beam can be fixed. For this reason, when attaching a beam to the support frame, the beam lifted in a horizontal posture must be inserted straight into the insertion hole of the support frame. Bonding work can be made easier.

In this case, the crane is attached to the connection beam, and defines the relative position of the intermediate frame main body with respect to the connection beam in the longitudinal direction of the connection beam with the connection beam fitted in the recess. It is preferable to further include a position defining portion.

According to this configuration, the relative position of the intermediate frame body with respect to the connection beam in the longitudinal direction of the connection beam can be defined by the position defining portion when the connection beam is fitted into the recess of the intermediate frame body. For this reason, the positioning operation of the relative position between the intermediate frame main body and the connection beam in the longitudinal direction of the connection beam can be simplified.

Further, in this case, the recess is formed to allow the coupling beam to be fitted in a state in which the coupling beam protrudes rearward from the rear end of the intermediate frame body, and the position defining portion is The connecting beam is disposed on one side with respect to the intermediate frame portion main body in the longitudinal direction of the connecting beam in a fitted state in which the connecting beam is fitted into the recess so as to protrude rearward from the rear end of the intermediate frame main body. A first blocking portion that is attached to the connecting beam and blocks the displacement of the intermediate frame main body relative to the connecting beam to the one side; and a longitudinal direction of the connecting beam with respect to the first blocking portion. It is arranged at intervals and arranged on the opposite side to the first blocking part with respect to the intermediate frame part body in the fitted state. A second blocking portion attached to the connecting beam and blocking the displacement of the intermediate frame main body to the opposite side with respect to the connecting beam, wherein the first blocking portion has a second blocking portion side. The first blocking surface has a portion that approaches the second blocking portion side from the lower end toward the upper side, and the second blocking portion faces the first blocking portion side. It is preferable that a second blocking surface is provided, and the second blocking surface has a portion that approaches the first blocking portion side from the lower end toward the upper side.

According to this configuration, when the connecting beam is fitted into the recess of the intermediate frame body, the relative position of the intermediate frame body with respect to the connecting beam is changed from the normal position between the first blocking surface and the second blocking surface. Even in the case where there is a slight shift in the longitudinal direction, the portion of the first blocking surface that approaches the second blocking portion side toward the upper side from the lower end thereof or the second blocking surface that increases toward the upper side from the lower end thereof. The part approaching the 1 blocking part side contacts the intermediate frame part main body, and the connecting beam is fitted into the concave part while correcting the shift of the relative position of the intermediate frame part main body along the contacted part. That is, in this configuration, the position deviation of the intermediate frame body with respect to the connection beam in the longitudinal direction of the connection beam can be automatically corrected by simply fitting the connection beam into the recess of the intermediate frame body from above. The operation of adjusting the relative coupling position between the frame portion main body and the connecting beam can be simplified.

Also, the embodiment provides a method of manufacturing a crane including a counterweight carriage that is connected to a crane body via a connection beam and is movable according to the movement of the crane body. In this crane manufacturing method, the counterweight bogie assembly method includes preparing an intermediate frame portion in the bogie component preparing step and the frame coupling step including the first frame portion coupling step and the second frame portion coupling step. And a crane component preparing step for preparing a crane main body and a connecting beam that can be attached to and detached from the crane main body and extend in a certain direction. In the cart component preparing step, An intermediate frame portion is prepared which is detachable from the connection beam and can be coupled to the connection beam so as to overlap a part of the connection beam in the longitudinal direction of the connection beam. The crane manufacturing method includes a beam coupling step of coupling the connection beam to the intermediate frame portion so that a part of the connection beam overlaps the intermediate frame portion in the longitudinal direction of the connection beam, and the intermediate frame A beam mounting step of integrally lifting the connecting beam coupled to the intermediate frame and the connecting beam, and attaching the connecting beam to the crane body so that the connecting beam extends rearward from the crane body, After the beam mounting step, the first frame portion coupling step is performed, and in the first frame portion coupling step, the lifted first frame portion is orthogonal to the intermediate frame portion in the longitudinal direction of the connection beam. Combined from one side in the left-right direction, and after the beam mounting step, the second frame portion combining step is performed. , Said a second frame part bonding step, thereby coupled from the one side opposite the second frame portion lifting relative to the intermediate frame portion.

In this manufacturing method, for the same reason as described for the crane, the work related to the connection between the crane body and the counterweight cart via the connection beam can be facilitated.

In the manufacturing method, in the cart component member preparing step, as the intermediate frame portion, an intermediate frame portion main body having a concave portion opened upward so as to allow fitting of the connection beam from above, and the intermediate frame portion main body And having a lid that can be fixed by covering the connecting beam fitted in the recess in a state of being coupled to the intermediate frame main body from above, and in the beam coupling step, The connecting beam is lifted and fitted into the recess of the intermediate frame body from above, and then the lid is covered by the lid so that the connecting beam fitted into the recess is covered from above by the lid and the intermediate frame. The intermediate frame part is formed by covering the part main body and combining the lid part with the intermediate frame part main body. It is preferable to couple together the connecting beam to the intermediate frame portion.

In this configuration of the manufacturing method, the connecting operation of the connecting beam to the intermediate frame portion can be facilitated for the same reason as described for the crane having the intermediate frame portion having the intermediate frame portion main body and the lid portion. .

In this case, in the crane component preparing step, the relative position of the intermediate frame portion main body in the longitudinal direction of the connection beam in the longitudinal direction of the connection beam is set as the connection beam. A connecting beam to which a position defining portion to be defined is attached is prepared, and in the beam combining step, the connecting beam is placed in the recess so that the intermediate frame body is disposed at the relative position defined by the position defining portion. It is preferable to fit in.

According to the structure of this manufacturing method, the relative position between the intermediate frame portion main body and the connection beam in the longitudinal direction of the connection beam for the same reason as described for the crane including the position defining portion attached to the connection beam. The positioning work can be simplified.

Further, in this case, in the crane component preparing step, as the position defining portion, the intermediate frame portion main body on one side of the intermediate frame portion main body in the longitudinal direction of the connecting beam in the fitted state. A first blocking portion for blocking displacement, and a distance from the first blocking portion in the longitudinal direction of the connecting beam so as to be positioned on the opposite side of the first blocking portion with respect to the intermediate frame main body in the fitted state. And a second blocking portion for blocking the displacement of the intermediate frame main body to the opposite side, the first blocking portion being a surface facing the second blocking portion side and its lower end A first blocking surface having a portion that approaches the second blocking portion side from the top to the upper side, and the second blocking portion is a surface that faces the first blocking portion side and has a lower end thereof In the beam combining step, the first blocking surface and the second blocking surface of the coupling beam are prepared. It is preferable to fit a portion located between and into the concave portion from above.

In this configuration, the position defining portion has a first blocking portion and a second blocking portion, the first blocking portion has a first blocking surface, and the second blocking portion has a second blocking surface. For the same reason as described for the crane, the misalignment of the intermediate frame body with respect to the connection beam in the longitudinal direction of the connection beam is automatically corrected by simply fitting the connection beam into the recess of the intermediate frame body from above. Therefore, the adjustment operation of the relative coupling position between the intermediate frame body and the connecting beam can be simplified.

As described above, according to the embodiment, it is possible to facilitate the work related to the coupling between the wheel unit coupling portion of the frame of the counterweight carriage and the wheel unit. Moreover, according to the said embodiment, the crane with which the connection operation | work of a crane main body and a counterweight trolley is easy, and its manufacturing method can be provided.

Claims (12)

1. A counterweight cart connected to the crane body and movable according to the movement of the crane body,
   A first wheel unit having a rotatable first wheel;
   A second wheel unit having a rotatable second wheel;
   A carriage frame that forms a loading surface on which a counterweight is loaded and that is detachably coupled to the first wheel unit and the second wheel unit;
   The bogie frame has a first wheel unit coupling portion that can be attached to and detached from the first wheel unit, and the first wheel unit coupled to the first wheel unit coupling portion is moved by the rotation of the first wheel. Sometimes having a first frame part supported by the first wheel unit so as to be movable together with the first wheel unit, and a second wheel unit coupling part detachable from the second wheel unit. A second frame supported by the second wheel unit so as to be movable together with the second wheel unit when the second wheel unit coupled to the second wheel unit coupling portion moves by rotation of the second wheel. And comprising
   The second frame unit is detachable from the first frame unit, and the second wheel unit coupled to the second wheel unit coupling unit in the state coupled to the first frame unit includes the first wheel. A crane counterweight carriage configured to be arranged side by side with the first wheel unit coupled to a unit coupling portion.
2. In the counterweight trolley | bogie of the crane of Claim 1,
   The cart frame further includes an intermediate frame portion having a first frame coupling portion detachable from the first frame portion and a second frame coupling portion detachable from the second frame portion,
   The intermediate frame unit is coupled to the first wheel unit coupling unit while the first frame unit is coupled to the first frame coupling unit and the second wheel unit coupling unit is coupled to the first wheel unit coupling unit. When the second frame unit coupled to the second wheel unit is coupled to the second frame coupling unit, the first wheel unit and the second wheel unit can be moved side by side, respectively. A counterweight carriage of a crane that connects the first frame part and the second frame part therebetween so that
3. A method of assembling a counterweight carriage connected to a crane body and movable in accordance with the movement of the crane body,
   A first wheel unit having a rotatable first wheel, a second wheel unit having a rotatable second wheel, and a first frame unit having a first wheel unit coupling portion detachable from the first wheel unit; The second wheel unit coupling part is detachable from the second wheel unit, and is detachable from the first frame part. When coupled to the first frame part, the second wheel unit coupling part A cart component preparing step for preparing a second frame unit configured so that the coupled second wheel unit is arranged side by side with the first wheel unit coupled to the first wheel unit coupling unit;
   A first wheel unit coupling step of lifting the first frame part and coupling the first wheel unit coupling part to the first wheel unit;
   A second wheel unit coupling step of lifting the second frame part and coupling the second wheel unit coupling part to the second wheel unit;
   In a state where the first wheel unit and the second wheel unit are arranged side by side, the first wheel unit can be moved by the rotation of the first wheel, and the second wheel unit can be moved by the rotation of the second wheel. A state in which the second wheel unit is coupled to the first frame unit and the second wheel unit coupling unit in a state in which the first wheel unit is coupled to the first wheel unit coupling unit so as to be movable. And a frame connecting step for connecting the second frame parts to each other.
4. In the method of assembling the counterweight carriage according to claim 3,
   In the cart component preparing step, the first wheel unit coupling portion includes a first frame coupling portion that is detachable from the first frame portion and a second frame coupling portion that is detachable from the second frame portion. The first frame unit in a state where the first wheel unit is coupled to the second frame unit is coupled to the first frame coupling unit, and the second wheel unit is coupled to the second wheel unit coupling unit. When the frame unit is coupled to the second frame coupling unit, the first frame unit and the second frame unit can be moved in a state where the first wheel unit and the second wheel unit are arranged side by side. Further preparing an intermediate frame part for connecting the frame part between them,
   In the frame connecting step, the first frame unit coupling is configured to couple the first frame unit in a state where the first wheel unit is coupled to the first wheel unit coupling unit to the first frame coupling unit of the intermediate frame unit. A second frame part coupling step for coupling the second frame part in a state where the second wheel unit is coupled to the second wheel unit coupling part to the second frame coupling part of the intermediate frame part; A method for assembling a counterweight carriage.
5. A counterweight carriage according to claim 2;
   The crane body,
   A connecting beam that is detachable from the crane body, and extends backward from the crane body in a state of being attached to the crane body,
   The counterweight carriage is connected to the crane body via the connection beam,
   The intermediate frame part is detachable from the connection beam, and is coupled to the connection beam so as to overlap a part of the connection beam in the longitudinal direction of the connection beam,
   The first frame part is disposed on one side with respect to the intermediate frame part in the left-right direction perpendicular to the longitudinal direction of the connection beam in a state of being coupled to the intermediate frame part, and is movable with the first wheel unit. Supported by the first wheel unit,
   The second frame portion is disposed on the opposite side of the first frame portion with respect to the intermediate frame portion in the left-right direction in a state where the second frame portion is coupled to the intermediate frame portion, and is movable with the second wheel unit. The crane is supported by the second wheel unit.
6. The crane according to claim 5,
   The intermediate frame part is detachable from the intermediate frame part main body having an indented portion opened upward to allow fitting of the connecting beam from above, and coupled to the intermediate frame part main body. A crane that covers and fixes the connecting beam fitted in the recess in a state where the connecting beam is fitted from above.
7. The crane according to claim 6,
   A position defining portion that is attached to the coupling beam and defines a relative position of the intermediate frame main body with respect to the coupling beam in a longitudinal direction of the coupling beam in a state in which the coupling beam is fitted in the recess; crane.
8. The crane according to claim 7,
   The recess is formed to allow the connection beam to be fitted in a state in which the connection beam protrudes rearward from the rear end of the intermediate frame body.
   The position defining portion is located in the longitudinal direction of the connection beam in the longitudinal direction of the connection beam in a fitted state in which the connection beam is fitted in the recess so that the connection beam protrudes rearward from the rear end of the intermediate frame portion main body. A first blocking portion that is attached to the coupling beam so as to be disposed on one side and blocks the displacement of the intermediate frame main body relative to the coupling beam to the one side; and the first blocking portion The coupling beam is attached to the coupling beam so as to be disposed at an interval in the longitudinal direction and to be disposed on the opposite side to the first blocking portion with respect to the intermediate frame body in the fitted state. A second blocking portion for blocking displacement of the intermediate frame body relative to the beam to the opposite side;
   The first blocking portion includes a first blocking surface facing the second blocking portion side, and the first blocking surface has a portion that approaches the second blocking portion side from the lower end toward the upper side,
   The said 2nd blocking part is provided with the 2nd blocking surface which faces the said 1st blocking part side, This 2nd blocking surface has a part which approaches the said 1st blocking part side as it goes to the upper side from the lower end.
9. A crane manufacturing method comprising a counterweight carriage connected to a crane body via a connecting beam and movable in accordance with the movement of the crane body,
   The assembly method of the counterweight carriage according to claim 4,
   A crane component preparing step of preparing the crane body and a connecting beam that is detachable from the crane body and extends in a certain direction,
   In the carriage component member preparing step, as the intermediate frame portion, an intermediate frame portion that is detachable from the connection beam and can be coupled to the connection beam so as to overlap a part of the connection beam in the longitudinal direction of the connection beam. Prepare
   The method of manufacturing the crane includes a beam combining step of coupling the connection beam to the intermediate frame portion so that a part of the connection beam overlaps the intermediate frame portion in a longitudinal direction of the connection beam, and the intermediate frame portion, A beam mounting step of integrally lifting the connection beam coupled to the intermediate frame portion and attaching the connection beam to the crane body so that the connection beam extends rearward from the crane body,
   After the beam attaching step, the first frame portion joining step is performed, and in the first frame portion joining step, the lifted first frame portion is orthogonal to the intermediate frame portion in the longitudinal direction of the connecting beam. Combined from one side in the left-right direction,
   After the beam mounting step, the second frame portion joining step is performed, and in the second frame portion joining step, the lifted second frame portion is joined to the intermediate frame portion from the opposite side to the one side. A crane manufacturing method.
10. In the manufacturing method of the crane of Claim 9,
    In the carriage component member preparing step, as the intermediate frame portion, an intermediate frame portion main body having a concave portion opened upward so as to allow fitting of the connection beam from above, and the intermediate frame portion main body are detachable. Preparing a cover having a lid that can be fixed by covering the connecting beam fitted into the recess in a state of being coupled to the intermediate frame body,
    In the beam combining step, the connecting beam is lifted and fitted into the recess of the intermediate frame body from above, and then the lid is covered so that the connecting beam fitted into the recess is covered from above by the lid. Manufacturing the crane that covers the connecting beam and the intermediate frame main body, and connects the lid to the intermediate frame main body to form the intermediate frame and the connecting beam to the intermediate frame. Method.
11. In the manufacturing method of the crane of Claim 10,
    In the crane component preparing step, as the connection beam, a position regulation that defines a relative position of the intermediate frame body main body in the longitudinal direction of the connection beam in a fitted state in which the connection beam is fitted in the recess. Prepare a connecting beam with parts attached,
    In the beam combining step, the connecting beam is fitted into the concave portion so that the intermediate frame main body is disposed at the relative position defined by the position defining portion.
12. In the manufacturing method of the crane of Claim 11,
    In the crane component preparing step, as the position defining portion, in the fitted state, on the one side of the intermediate frame portion main body in the longitudinal direction of the connection beam, displacement of the intermediate frame portion main body to one side thereof is prevented. 1 blocking portion, and arranged in the longitudinal direction of the connecting beam at a distance from the first blocking portion so as to be located on the opposite side of the first blocking portion with respect to the intermediate frame body in the fitted state, A second blocking portion for blocking the displacement of the intermediate frame main body to the opposite side, and the first blocking portion is a surface facing the second blocking portion and from the lower end toward the upper side. A first blocking surface having a portion approaching the second blocking portion side, the second blocking portion being a surface facing the first blocking portion side; Prepare a comprising a second blocking surface having a portion closer to the first blocking portion,
    In the beam combining step, a portion of the connection beam that is positioned between the first blocking surface and the second blocking surface is fitted into the concave portion from above.

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