JP6172223B2 - Crane counterweight carriage and its assembly method - Google Patents

Description

  The present invention relates to a crane counterweight carriage and an assembling method thereof.

  2. Description of the Related Art Conventionally, counterweight carts that are connected to a crane body to increase the stability of the crane body and improve the crane's lifting ability are 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.

JP 2000-198674 A

  The crane may be transported to a work site or the like, and in that case, the crane is loaded and transported on a transport vehicle such as a trailer. 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 ensure 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 joint portion of the support frame and the joint portion of each pair of wheels. Such a position adjustment for a heavy support frame 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, and the work process is increased in this respect as well. 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.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to facilitate work related to the coupling between the coupling portion of the frame of the counterweight carriage and the wheel unit.

  In order to achieve the above object, a counterweight carriage for a crane according to the present invention is a counterweight carriage that is connected to a crane body and is movable according to the movement of the crane body, and has a first wheel that is rotatable. A wheel unit, a second wheel unit having a rotatable second wheel, and a carriage frame on which a counterweight is loaded and which 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 supporting the first wheel unit so as to be possible, and a second wheel unit detachable from the second wheel unit. The second wheel unit coupled to the second wheel unit coupling portion in the state connected to the first frame portion and having the coupling portion and detachable from the first frame portion is the first wheel unit. A second frame portion that is arranged side by side with the first wheel unit coupled to the coupling portion and supports the second wheel unit so as to be movable by rotation of the second wheel. ).

  In the present invention, the fact that the second frame part is detachable from the first frame part not only means that the second frame part is directly detachable from the first frame part, but also the first frame. Since another member is interposed between the first frame portion and the second frame portion, and the other members are detachable from the first frame portion and / or the second frame portion, the second frame portion is attached to the first frame portion. It is a concept that includes being indirectly detachable. Further, in the present invention, the second frame part being connected to the first frame part not only means that the second frame part is directly coupled to the first frame part, but also the first frame part and the second frame part. It is a concept that includes that the second frame portion is indirectly connected to the first frame portion via another member other than the frame portion.

  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. Since the first frame part, the second frame part, the first wheel unit and the second wheel unit separated from each other are transported, the first frame part is attached to the temporarily placed first wheel unit. While lifting and joining the first wheel unit coupling portion of the first frame portion, the second frame portion is lifted separately from the first frame portion with respect to the temporarily placed second wheel unit, and the second frame portion of the second frame portion is lifted. The two-wheel unit connecting part is connected, and then the first frame part and the second frame part are connected to each other to form a carriage frame, and the first wheel unit and the second wheel The first wheel unit in a state aligned and the knit can be and second wheel unit is movable by rotation of the first wheel assembling a movable counterweight carriage by rotation of the second wheel. 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. In order to align the wheel unit coupling portion of each frame portion with the corresponding wheel unit coupling portion in the coupling operation with each corresponding wheel unit, the position of the frame portion is adjusted while each frame portion is lifted individually. It can be done relatively easily. 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. The first wheel unit and the second wheel unit are arranged side by side when the second frame unit in a state where the second wheel unit is coupled is coupled to the second frame coupling unit. The wheel unit is movable by the rotation of the first wheel and the second wheel unit is movable by the rotation of the second wheel. It is preferred to connect the said first frame portion and the second frame part between them (Claim 2).

  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.

  A method of assembling a counterweight carriage according to the present invention 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, and includes a first wheel unit having a rotatable first wheel. A second wheel unit having a rotatable second wheel, a first frame unit having a first wheel unit coupling part detachable from the first wheel unit, and a second detachable from the second wheel unit. The second wheel unit that has a wheel unit coupling part and is 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. A preparing step of preparing a second frame portion configured to be arranged side by side with the first wheel unit coupled to a unit coupling portion; A first wheel unit coupling step of lifting a ram part to couple the first wheel unit coupling part to the first wheel unit; and lifting the second frame part to couple the second wheel unit coupling part to the second wheel unit. The first wheel unit can be moved by the rotation of the first wheel in a state where the first wheel unit and the second wheel unit are arranged side by side, The first frame unit and the second wheel unit coupling unit in a state where the first wheel unit is coupled to the first wheel unit coupling unit so that the two-wheel unit can be moved by rotation of the second wheel. And a frame connecting step of connecting the second frame unit in a state where the second wheel unit is coupled to each other (Claim 3).

  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 method of assembling the counterweight carriage, the preparing step includes a first frame coupling portion detachable from the first frame portion and a second frame coupling portion 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 of being connected to the second frame connecting part, the first wheel unit is arranged in a state where the first wheel unit and the second wheel unit are arranged side by side. The first frame part and the second frame part are moved so that they can move by rotation and the second wheel unit can move by rotation of the second wheel. An intermediate frame portion for connecting the first wheel unit to the first wheel unit coupling portion; and the first frame unit in the state where the first wheel unit is coupled to the first wheel unit coupling portion. A first frame unit coupling step for coupling to the first frame coupling unit; and the second frame unit in a state where the second wheel unit is coupled to the second wheel unit coupling unit. It is preferable to include a second frame portion coupling step for coupling to the frame coupling portion.

  According to this configuration, since the size and weight occupied by the first frame portion and the second frame portion are reduced by the amount of the intermediate frame portion, the wheel unit coupling portions of the first and second frame portions are coupled to the corresponding wheel units. Since the first and second frame parts are individually lifted to adjust the position to the parts, the position adjustment of the frame parts can be performed more easily.

  As described above, according to the present invention, it is possible to facilitate work related to the coupling between the wheel unit coupling portion and the wheel unit of the frame of the counterweight carriage.

It is a side view of the crane with which the counterweight trolley | bogie by one 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 a counterweight trolley | bogie. It is a figure which shows the assembly process of a counterweight trolley | bogie. It is a figure which shows the assembly process of a counterweight trolley | bogie. It is a figure which shows the assembly process of a counterweight trolley | bogie. It is a figure which shows the assembly process of a counterweight trolley | bogie. It is a figure which shows the assembly process of a counterweight trolley | bogie.

  First, a crane 2 to which a counterweight cart 1 according to an 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 and a carriage 1.

  The crane body 4 includes a lower traveling body 8, an upper swing body 9, a connecting portion 10, 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 a base end (lower end) as a fulcrum at a position on the rear side 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” regarding the upper swing body 9, the connecting portion 10, and the carriage 1 means the side on which the boom 16 is provided in the upper swing body 9. "Means the opposite side to the side on which the boom 16 is provided. Further, the “right side” regarding the upper swing body 9, the connecting portion 10, and the cart 1 is a case where the upper swing body 9, the connecting portion 10, and the cart 1 are viewed from the rear side to the front side in an integrated state. The “left side” with respect to the upper swing body 9, the connecting portion 10, and the carriage 1 means that the upper swing body 9, the connecting portion 10, and the carriage 1 are integrated with each other from the rear side to the front side. It means the left side when viewed.

  The connecting portion 10 connects the upper swing body 9 (upper swing body main body 14) and the carriage 1. The connecting portion 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 portion 10 is a beam-like member that protrudes from the rear end of the upper swing body main body 14 and extends rearward along the front-rear direction of the upper swing body main body 14, and its longitudinal direction (the front-rear direction of the upper swing body main body 14). It is comprised so that expansion-contraction is possible.

  The cart 1 according to the present embodiment is connected to the crane body 4 (upper turning body 9) of the crane 2 having the above-described configuration, and the movement of the crane body 4 (travel of the crane body 4 and the upper turning body 9). It is possible to move according to the turning). 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 present embodiment will be described in detail.

  The carriage 1 is disposed at a position away from the upper swing body 9 to the rear of the upper swing body 9. The carriage 1 is loaded with a counterweight 27 (see FIG. 1) and is connected to the tip of the mast 18 via the carriage guideline 24 (see FIG. 1) as described above and through the connecting portion 10. By being connected to the rear part of the upper swing body 14, the balance of the suspension load applied to the front part of the upper swing body 9 and the load of the boom 16 during the lifting work is improved, thereby improving the stability of the crane 2. Increase the lifting capacity of the crane 2. The carriage 1 is configured to be capable of self-propelling, and can move according to the movement of the crane body 4, that is, according to 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, and 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 capable of turning about 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 bogie 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 present embodiment, the right wheel unit 28 has four right wheels 36 as the plurality of right wheels 36, and two of the four right wheels 36 are in pairs.

  The wheel drive device 38 (see FIG. 2) is a device that rotationally drives the 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. The wheel drive device 38 rotationally drives the right wheel 36 so that the carriage 1 is self-propelled.

  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 carriage 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 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 connecting portion 10, and is coupled to the connecting portion 10 in that state. The bogie frame 30 is detachably coupled to the right wheel unit 28 and the left wheel unit 29 disposed below, and supports the wheel units 28 and 29, respectively. 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, and 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 portion 45 is a portion that is coupled to the right wheel unit 28 and supports the right wheel unit 28 so that the right wheel unit 28 can be moved by the rotation of the right wheel 36. 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 portion main body 49 is formed in a block shape extending in the left-right direction, and is disposed directly 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 portion 51 is a portion 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, and is supported by the right frame portion 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 supports the right wheel unit 28 so that the right wheel unit 28 coupled to the right wheel unit coupling unit 51a can be moved by the rotation of the right wheel 36.

  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 FIG. 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 mounting 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, and are provided so as to protrude downward from the right frame portion main body 49.

  The left frame part 46 (see FIG. 2) can be attached to and detached from the right frame part 45 via the intermediate frame part 47. 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 is arranged side by side with the right wheel unit 28 attached to the right frame unit 45 and the left wheel unit. The left wheel unit 29 is supported so as to be movable by the rotation of 44.

  The left frame portion 46 is configured to be bilaterally symmetrical with the right frame portion 45. That is, the left frame portion 46 has a left frame portion main body 59, a turning portion 61, and two jack mounting portions 62 corresponding to the right frame portion main body 49, the turning portion 51, and the two jack attaching portions 52. The arrangement and configuration of the left frame portion main body 59, the turning portion 61, and the two jack attachment portions 62 are equivalent to the arrangement and configuration of the right frame portion main body 49, the turning portion 51, and the two jack attachment portions 52 that are horizontally reversed. To do.

  The left frame portion main body 59 is disposed immediately 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 left wheel unit 29 is supported so as to be arranged side by side with the unit 28 and to be movable by the rotation of the right wheel 44.

  The left wheel unit coupling portion 61a has the same configuration as the right wheel unit coupling portion 51a, and has the same structure as the coupling structure of the right wheel unit coupling portion 51a with respect to the coupling portion 34a of the right wheel unit 28. It is detachably coupled to the coupling portion 42a. 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 a central portion in the left-right width direction of the carriage frame 30. 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 portion 10. The intermediate frame portion main body 70 has a coupled portion 70 a coupled to the coupling portion 10. The coupled portion 70a is a recess into which the connecting portion 10 is fitted. The coupled portion 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 portion 10 is fitted into the coupled portion 70 a, and the lid portion 73 is fixed to the intermediate frame portion main body 70 so as to cover the connecting portion 10 from above, whereby the intermediate frame portion main body 70 is connected to the connecting portion 10. Is fixed. In this state, the center of the intermediate frame portion main body 70 in the left-right width direction coincides with the center of the connecting portion 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 connecting 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 state of being connected to the left frame combination portion 72, the right wheel unit 28 and the left wheel unit 29 are arranged side by side in the left-right direction and the right wheel unit 28 is connected to the right wheel 36. The right frame portion 45 and the left frame portion 46 are connected to each other so that the left wheel unit 29 can be moved by the rotation and the left wheel unit 29 can be moved by the rotation of the left wheel 44.

  The right wheel steering device (not shown) is a drive device for turning the right wheel unit 28 about the turning axis C2 to change the direction of the right wheel unit 28, and is provided on the right frame 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 driving device for turning the left wheel unit 29 about 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. Yes. 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 present embodiment having the above-described configuration is disassembled into components when being 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 integrated and lowered until the right wheel 36 is installed, while the two front and rear jack devices 33 are extended so that the front jack mounting portion 52 (not shown) is attached to the front side. The rear jack mounting portion 52 is combined with the mounted portion 78 of the rear jack device 33 while being combined with the mounted portion 78 of the jack device 33 (not shown). 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 61 a of the left frame unit 46 is coupled to the coupling unit 42 a 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 connecting part 10 is connected to the intermediate frame part 47 (see FIG. 7), and the front end part of the connecting part 10 is connected to the rear part of the upper swing body 14 (see FIG. 1). The coupling of the rear portion of the connecting portion 10 to the intermediate frame portion 47 is performed by fitting the rear portion of the connecting portion 10 into the coupled portion 70a of the intermediate frame portion 47, and covering the fitted connecting portion 10 with the lid portion 73 and the lid portion. This is performed by fixing 73 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 wheel unit 28 can be moved by the rotation of the right wheel 36 while the right wheel unit 28 and the left wheel unit 29 are arranged side by side in the left-right direction, and the left wheel unit 29 is moved to the left wheel 44. The right frame unit 45 of the right cart unit 80 and the left frame unit 46 of the left cart unit 82 are connected via the intermediate frame unit 47 so as to be movable by the rotation of.

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

  In the right frame part coupling step, as shown in FIG. 7, the right cart unit 80 is lifted by a crane. 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 for 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 the left frame portion coupling 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 present embodiment, the right frame unit 45 having the right wheel unit 28 and the detachable right wheel unit coupling part 51a, and the left frame unit 46 having the left wheel unit 29 and the detachable left wheel unit coupling part 61a are: They 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 portion 51a is coupled, the left frame portion 46 is lifted separately from the right frame portion 45 to the temporarily placed left wheel unit 29 to couple the left wheel unit coupling portion 61a, and then the right frame portion. 45 and the left frame portion 46 are connected via an intermediate frame portion 47 to form a bogie frame 30, and the right wheel unit 28 and the left wheel unit 29 are aligned in the left-right direction. 36, and the left wheel unit 29 is moved by the rotation of the left wheel 44. Possible truck 1 can be assembled a. 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, since the size and weight of each of the right frame portion 45 and the left frame portion 46 are smaller than the overall size and weight of the bogie frame 30, the wheel unit coupling portions 51a and 61a of the respective frame portions 45 and 46 and In the connecting operation of the corresponding wheel units 28 and 29 with the connecting portions 34a and 42a, the wheel unit connecting portions 51a and 61a of the respective frame portions 45 and 46 are aligned with the connecting portions 34a and 42a of the corresponding wheel units 28 and 29. Therefore, the position adjustment of each of the frame portions 45 and 46 can be performed relatively easily in a state where the frame portions 45 and 46 are individually lifted.

  Further, in the present embodiment, the jack-up work for the entire bogie 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 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 this 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 this embodiment, the carriage frame 30 has a right frame coupling portion 71 and a left frame coupling portion 72, and coupled to the right frame portion 45 and the left frame coupling portion 72 coupled to the right frame coupling portion 71. An intermediate frame portion 47 that connects the left frame portion 46 to each other is provided. 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.

  Moreover, in this embodiment, since the right side frame part 45 and the left side frame part 46 which are lighter in weight than the entire carriage frame 30 are individually lifted, a small crane having a relatively small lifting capacity is used as the crane used for the lifting. Can do. For this reason, the cost concerning the assembly work of the cart 1 can be reduced.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  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 shown in the above embodiment.

  Moreover, the site | part couple | bonded with a connection part among trolley | bogies is not necessarily limited to the to-be-joined part 70a located in the center of the left-right width direction of the intermediate frame part 47 shown in the said embodiment. For example, a portion other than the intermediate frame portion of the bogie frame may be coupled to the connecting portion, and a portion at a position shifted in the left-right direction from the center in the left-right width direction of the bogie frame may be coupled to the connecting portion.

  Further, the connecting portion and the carriage frame may be coupled to each other with a structure other than the coupling structure shown in the above embodiment.

  Moreover, as long as the cart 1 is connected to the mast 18 of the crane main body 4 via the cart guy line 24, the cart 1 does not necessarily need to be connected to the upper swing body 14 via the beam-shaped connecting portion 10.

  Moreover, the cart does not necessarily need to be able to run on its own. In other words, the carriage may not be provided with a wheel drive device, but may be moved by being pulled by the crane body via the connecting portion.

1 Counterweight cart 2 Crane 4 Crane body 28 Right wheel unit (first wheel unit)
29 Left wheel unit (second wheel unit)
30 Bogie frame 36 Right wheel (first wheel)
44 Left wheel (second wheel)
45 Right frame part (first frame part)
46 Left frame (second frame)
47 Intermediate frame 51a Right wheel unit coupling part (first wheel unit coupling part)
61a Left wheel unit coupling part (second wheel unit coupling part)
71 Right frame joint (first frame joint)
72 Left frame joint (second frame joint)

Claims (4)

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 counter frame on which a counterweight is loaded, and a carriage frame 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 can be moved by rotation of the first wheel. A first frame part that supports the first wheel unit so as to have a second wheel unit coupling part that is detachable from the second wheel unit, and is detachable from the first frame part, The second wheel unit coupled to the second wheel unit coupling unit in a state coupled to the one frame unit is disposed side by side with the first wheel unit coupled to the first wheel unit coupling unit and the first A counterweight carriage of a crane, comprising: a second frame portion that supports the second wheel unit so as to be movable by rotation of two wheels. 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. The first wheel in a state in which the first wheel unit and the second wheel unit are arranged side by side when the second frame unit in a state where the second wheel unit is coupled is coupled to the second frame coupling unit. The first frame part and the second frame part are connected between them so that the unit is movable by the rotation of the first wheel and the second wheel unit is movable by the rotation of the second wheel. The counterweight carriage of a crane according to claim 1. 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 preparing step of 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. In the preparation step, the first frame unit includes a first frame coupling unit that is detachable from the first frame unit, and a second frame coupling unit that is detachable from the second frame unit, and the first wheel unit coupling unit includes the first frame coupling unit. The first frame portion in a state in which one wheel unit is coupled is coupled to the first frame coupling portion, and the second frame portion in a state in which the second wheel unit is coupled to the second wheel unit coupling portion. When the first wheel unit and the second wheel unit are arranged side by side when coupled to the second frame coupling portion, the first wheel unit is movable by the rotation of the first wheel and the second An intermediate frame portion is further provided for connecting the first frame portion and the second frame portion therebetween so that the wheel unit can be moved by the rotation of the second wheel. ,
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; The assembly method of the counterweight trolley | bogie of Claim 3 which has these.

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