JP2017039590A - Construction machine and method for attaching vehicle body weight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine that can efficiently attach a vehicle body weight to a vehicle body without using a mating crane, and to provide a method for attaching a vehicle body weight.SOLUTION: In a crawler crane including a crawler and a jack for removing the crawler, a vehicle body weight 20 attached to the crawler crane includes: a weight body 21 formed by iron plate-like bodies 21a, 21b, 21c; a fastening seat 22 provided to the weight body 21 and fastened to a tip part of the jack; a bracket 23 for fixing the weight body 21 to the vehicle body using a pin; and a hanging member 24 for transporting the vehicle body weight 20.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a construction machine including a car body weight that improves stability, and a method for attaching a car body weight.

  As a construction machine, for example, there is a crawler crane in which an upper revolving unit is provided on an upper part of a lower traveling unit provided with a crawler. In this crawler crane, the boom is supported by the upper swinging body so that it can be raised and lowered, and car body weights are mounted on the front and rear end faces of the lower traveling body to improve balance and sudden release capability. Has been done. Further, since it is necessary to remove the crawler from the lower traveling body when transporting a large crawler crane, a jack that supports the car body when the crawler is removed is provided on the car body.

  In recent years, it has been desired to run a crawler crane in a state in which the width of the crawler crane is reduced by moving the crawler to the car body side while the car body weight is mounted, for example, on the road. For this reason, the car body weight can be placed between the jacks in the retracted position, and the jack can be retracted with the car body weight attached to the car body. There is also a crawler crane that can be moved in the body direction to reduce the width of the crawler crane (see Patent Document 1).

JP 2014-125282 A

However, since the car body weight is attached to the front and back of the car body, that is, the upper swing body, it is difficult to remove the car body weight by itself. For this reason, there has been a problem that a phase crane is required for mounting the car body weight.
In addition, since the space for mounting the car body weight is very narrow and the car body weight is lifted by the phase crane, the mounting workability is very poor. In particular, when the construction machine is equipped with a jack, the work space is further limited, and there is a problem that the mounting workability is further deteriorated.

  Accordingly, the present invention has been made to solve the above-described problems, and it is possible to efficiently attach a car body weight to a car body without using a companion crane and to attach the car body weight. It aims to provide a method.

  One form of this invention made | formed in order to solve the said subject is a construction machine provided with the crawler and the jack for the removal of the said crawler, The car body weight attached to the said construction machine is formed with a steel plate-shaped object. Weight body, fastening member provided on the weight body and fastened to the tip of the jack, a bracket for pinning the weight body to the car body, and a suspension member for transporting the car body weight It is characterized by having.

  In this construction machine, the car body weight can be attached to the car body by fastening the tip of the jack and the fastening member provided on the weight main body and shrinking the jack to the shortest. That is, the car body weight can be attached to the car body without using the phase crane.

  Here, since the weight of the car body weight always acts on the jack, the oil in the cylinder leaks, the jack extends, and the car body weight may fall to the ground. However, since the car body weight is provided with a bracket for fixing the weight body to the car body, the car body weight can be firmly fixed to the car body. That is, after tightening the jack tip and the fastening member provided on the weight body to shrink the jack to the shortest, the car body weight can be firmly fixed to the car body by pin fixing via the bracket. it can.

  Thus, according to this construction machine, the car body weight can be attached to the car body by using the jack provided in the construction machine without using the companion crane. Further, since the car body weight is not lifted by the crane, the car body weight does not move carelessly, so that the mounting workability is improved and the safety during work is also improved.

  In the construction machine described above, U-shaped parts with the center in the short direction cut out are formed at both ends in the longitudinal direction of the weight body, and the fastening members are provided at both ends of the U-shaped part, respectively. It is desirable that

  With such a configuration, a work space is secured in the U-shaped portion, so that the mounting workability can be further improved. Further, since the fastening members are provided at the four corners of the weight main body, the car body weight can be lifted in a stable state, so that the safety during work is further improved.

  In the construction machine described above, it is desirable that the bracket is provided at the bottom of the U-shaped part.

  With such a configuration, a sufficient working space for driving the fixing pin into the bracket can be secured. Therefore, workability until the car body weight is attached and fixed to the car body can be improved.

  Furthermore, in the construction machine described above, it is desirable that the fastening member is provided at a position where the fastening member can be fastened to the tip end portion of the jack in a state where the jack is moved to a retracted position that fits within a width of the car body.

  With such a configuration, in the case of a construction machine that can move the crawler to the car body side, the construction machine can be run with the width of the construction machine reduced while the car body weight is attached.

  In the construction machine described above, the fastening member may also serve as the suspension member.

  With such a configuration, the structure of the car body weight can be simplified. However, in this case, since it is difficult to directly fasten the tip of the jack to the fastening member, an adapter is attached to the tip of the jack, and the jack and the fastening member are fastened through the adapter. Just do it.

  Furthermore, in the construction machine described above, the weight main body may be divided into a plurality of parts and joined together by a joining means.

  With this configuration, the car body weight can be disassembled. Accordingly, when there is a weight limit during transportation, the car body weight can be disassembled and transported with the weight within the limit.

  Another aspect of the present invention, which has been made to solve the above problems, is a self-propelled construction machine in a method of attaching a car body weight attached to a car body of a construction machine comprising a crawler and a jack for removing the crawler. An alignment step of extending the jack and aligning the tip portion with the fastening member provided on the car body weight, straddling the car body weight placed on the ground, and the tip portion of the jack The car body weight is connected to the car body via a levitation step of fastening the fastening member and shrinking the jack to float the car body weight from the ground, and a bracket provided on the car body weight levitated from the ground. And a fixing step of fixing the pin to the pin.

  In this car body weight mounting method, in the positioning process, the construction machine is self-propelled, straddling the car body weight placed on the ground, the jack is extended, and the fastening member provided at the tip and the car body weight Align with. In the levitation step, the tip of the jack is fastened to the fastening member, the jack is shrunk, and the car body weight is lifted from the ground. Thereafter, in the fixing step, the car body weight is pin-fixed to the car body via a bracket provided on the car body weight levitated from the ground. Thus, the car body weight can be attached to the car body by using the jack provided in the construction machine without using the phase crane. Since the car body weight is not lifted by the crane, the car body weight cannot be moved carelessly, so that the mounting workability is improved and the safety during work is also improved.

  According to the construction machine and the car body weight attachment method according to the present invention, the car body weight can be efficiently attached to the car body without using a companion crane.

It is a side view of the crawler crane of this embodiment. It is a top view of the lower traveling body of a crawler crane. It is a side view of the lower traveling body of a crawler crane. It is a top view of the car body weight concerning this embodiment. It is a side view of the car body weight concerning this embodiment. It is a figure which shows the positional relationship of the car body weight at the time of attachment start, and a crawler crane. It is a figure which shows the state which has performed position alignment with the front-end | tip part of a jack, and a fastening seat, Comprising: (a) is the figure seen from the front (front), (b) is the figure seen from the side. It is a figure which shows the state which fastened the front-end | tip part and fastening seat of the jack, Comprising: (a) is the figure seen from the front (front), (b) is the figure seen from the side. It is a figure which shows the state which floated the car body weight from the ground and shortened the jack to the shortest, (a) is the figure seen from the front (front), (b) is the figure seen from the side. It is a figure which shows the state which pin-fixed the car body weight to the car body, Comprising: (a) is the figure seen from the front (front), (b) is the figure seen from the side. The top view of the car body weight concerning the 1st modification is shown. The side view of the car body weight concerning the 1st modification is shown. The front view of the car body weight which concerns on a 1st modification is shown. The top view of the car body weight concerning the 2nd modification is shown. The side view of the car body weight concerning the 2nd modification is shown. It is a front view of an adapter. It is a side view of an adapter. It is a figure which shows the state which mounted | wore the adapter with the jack. It is a figure which shows the state which fastened the front-end | tip part and fastening member of the jack via the adapter, Comprising: (a) is the figure seen from the front (front), (b) is the figure seen from the side. It is the enlarged view of the fastening part vicinity shown to Fig.19 (a), and the figure seen from the front (front). It is the enlarged view of the fastening part vicinity shown in FIG.19 (b), and the figure seen from the side surface. It is a figure which shows the state which pin-fixed the car body weight to the car body, Comprising: (a) is the figure seen from the front (front), (b) is the figure seen from the side.

  Hereinafter, embodiments of a construction machine and a car body weight mounting method according to the present invention will be described in detail with reference to the drawings. This embodiment demonstrates the case where a car body weight is attached to a crawler crane.

  Therefore, first, a crawler crane to which a car body weight is attached will be described with reference to FIGS. FIG. 1 is a side view of a crawler crane to which a car body weight according to the present embodiment is attached. FIG. 2 is a plan view of the lower traveling body of the crawler crane. FIG. 3 is a side view of the lower traveling body of the crawler crane.

  As shown in FIG. 1, the crawler crane 11 includes a lower traveling body 12 and an upper revolving body 13 that is turnable on the upper portion of the lower traveling body 12. The unit is provided with an equipment room (engine room) 13a equipped with an engine, a hydraulic pump, etc., and a plurality of winches (not shown) each wound with a main winding rope 14a, an auxiliary winding rope 14b, and a pendant rope 14c, A boom 15 that can tilt in the front-rear direction and a cab 13b are provided at the front, and a plurality of counterweights 16 are placed on the base 13c at the rear.

  As shown in FIGS. 2 and 3, the lower traveling body 12 is mounted on a car body 17 having a swivel bearing 17 a at the upper center, and a pair of axles 18 a and crawler expansion / contraction cylinders 18 b on both sides of the car body 17. Crawler 18. The axle 18a is telescopically formed so as to be extendable and contracted. Normally, the crawler 18 is disposed in a state where the axle 18a is extended to the maximum, that is, the position shown in FIG.

  Further, jack brackets 17b are provided at both front and rear end portions of the car body 17, and the base portions of the jack arms 19a each having a jack 19 attached to the tip thereof are respectively turned to the jack brackets 17b. It is mounted movably. Further, a connecting arm 17c made of a plate-like body for pin-fixing the car body weight 20 is provided at the front lower center and the rear lower center of the car body 17, respectively. The details of the car body weight 20 will be described later.

  The jack 19 is formed so as to be movable between a retracted position shown in FIG. 2 and a work position where the jack arm 19a is expanded toward the crawler 18 by rotating the jack arm 19a around the jack bracket 17b. ing. In the retracted position, most of the jack arm 19a and the jack 19 are formed so as to fit within the width of the car body 17, and in the working position, the jack 19 protrudes to the side of the car body 17.

  Here, when the crawler crane 11 is transported, usually, each jack 19 is extended to the working position and the jack 19 is extended (at this time, a grounding plate is attached to the tip of the jack 19). 17 is raised to place the crawler 18 in a non-grounded state, and the crawler 18 is removed from the axle 18a. Accordingly, the car body 17 connected to the upper swing body 13 from which the boom 15 is removed and the pair of crawlers 18 can be transported in a disassembled state.

  On the other hand, when traveling with the crawler 18 mounted, the jack 19 is contracted to ground the crawler 18 and can travel with each jack 19 stored in the storage position. Further, the jack 19 is actuated to raise the car body 17 to bring the crawler 18 into a non-grounded state, and the crawler expansion / contraction cylinder 18b is contracted to contract the axle 18a. The width of the crawler crane 11 can be reduced by moving in the direction of the car body 17. The jack 19 is operated to ground the crawler 18 so that the traveling width of the crawler crane 11 can be reduced.

  Next, the car body weight 20 attached to the crawler crane 11 will be described with reference to FIGS. 4 and 5. FIG. 4 is a plan view of the car body weight according to the present embodiment. FIG. 5 is a side view of the car body weight according to the present embodiment.

  As shown in FIGS. 4 and 5, the car body weight 20 is formed by laminating three flat rectangular parallelepiped iron plate bodies 21 a, 21 b, and 21 c and adjoining each other of the iron plate bodies adjacent to each other in the vertical direction. The weight main body 21 formed by welding and joining, the fastening seats 22 provided at the four corners of the weight main body 21, the brackets 23 provided at the two central ends in the short direction of the weight main body 21, and the weight main body 21 And four lifting members 24 provided on the upper surface.

  The iron plate-like bodies 21a, 21b, and 21c have shapes in which the thickness and the vertical and horizontal dimensions become smaller in order, and the iron plate-like bodies 21a, 21b, and 21c are joined together by welding at four sides. Thus, the weight main body 21 is configured. And U-shaped part 21u by which the short direction center was notched is formed in the longitudinal direction both ends of the weight main body 21 (iron plate-shaped body 21a). Fastening seats 22 are respectively disposed at both ends of the U-shaped portion 21u. A bracket 23 is disposed at the center of the bottom of the U-shaped portion 21u. Further, a lifting member 24 is disposed between the fastening seat 22 of the U-shaped portion 21 u and the bracket 23. The fastening seat 22 and the lifting member 24 are provided on the iron plate-like body 21a, and the bracket 23 is provided on the iron plate-like body 21b.

  The fastening seat 22 joins the jack 19 and the weight main body 21 by engaging the tip (lower end) portion of the jack 19 with a horseshoe-shaped mounting portion and fixing the pin. The fastening seat 22 is provided at a position where the jack 19 can be fastened to the tip end portion of the jack 19 in a state where the jack 19 is moved to a storage position within the width of the car body 17. Accordingly, the car body weight 20 can be disposed between the jacks 19 adjacent to each other in the width direction of the car body 17 with the jack 19 stored in the storage position.

  According to such a car body weight 20, the car body weight 20 can be attached to the car body 17 even when the crawler 18 is moved in the direction of the car body 17 and the width dimension of the crawler crane 11 is reduced. it can. As a result, the crawler crane 11 can be made to travel in a narrow place with the car body weight 20 attached.

  The bracket 23 is a member for pin-fixing the weight body 21 to the car body 17 via the connecting arm 17c. The lifting member 24 is a member for attaching a wire rope when the car body weight 20 is conveyed.

  Next, a procedure for attaching the car body weight 20 to the car body 17 of the crawler crane 11 will be described with reference to FIGS. In the following description, a case where the car body weight is attached with the crawler 18 disposed at the work position is illustrated. In the drawing, only the lower traveling body related to the attachment of the car body weight is shown.

  First, as shown in FIG. 6, the car body weight 20 is arranged at a predetermined position on the ground. Then, the crawler crane 11 is caused to self-travel toward the car body weight 20 disposed at a predetermined position on the ground by the crawler crane 11. At this time, the crawler crane 11 is moved so that the car body weight 20 is positioned at the center of the pair of crawlers 18. In this way, as shown in FIGS. 7A and 7B, the crawler crane 11 is caused to self-travel and straddle the car body weight 20. Thereafter, as shown in FIG. 7B, the jack 19 is extended to align the tip of the jack 19 with the fastening seat 22 of the car body weight 20 (positioning step). Specifically, the tip of the jack 19 is positioned near the opening of the fastening seat 22 (on the right side in FIG. 7B).

  Next, as shown to Fig.8 (a) (b), the front-end | tip part of the jack 19 and the fastening seat 22 are fastened (fastening process). Specifically, while finely adjusting the movement of the crawler crane 11, the front end of the jack 19 is engaged with the fastening seat 22 and the fixing pin is driven to fasten the front end of the jack 19 and the fastening seat 22. Let Thereby, the jack 19 and the car body weight 20 are combined.

  And as shown to Fig.9 (a) (b), the jack 19 is shrunk and the car body weight 20 is levitated from the ground (levitation process). Specifically, the four jacks 19 are simultaneously operated and contracted to the shortest, and the car body weight 20 is lifted from the ground and lifted to the vicinity of the lower surface of the car body 17. As a result, the pin holes of the bracket 23 of the car body weight 20 and the connecting arm 17 c provided on the car body 17 coincide with each other.

  Thereafter, as shown in FIGS. 10A and 10B, the car body weight 20 levitated from the ground is fixed to the car body 17 (fixing step). Specifically, the fixing pin P is driven into the pin hole of the bracket 23 and the pin hole of the connecting arm 17c, and the car body weight 20 is fixed to the car body 17 via the bracket 23 and the connecting arm 17c. Thereby, the car body weight 20 can be firmly fixed to the car body 17. Therefore, even if the weight of the car body weight 20 acts on the jack 19, it is possible to reliably prevent the oil in the cylinder of the jack 19 from leaking and the jack 19 to extend and the car body weight to fall to the ground. Can do.

  Thus, according to the attachment method according to the present embodiment, the car body weight 20 can be attached to the car body 17 by using the jack 19 provided in the crawler crane 11 without using the comparatory crane. . Since the car body weight 20 is not lifted by the crane during the mounting operation, the car body weight 20 does not move carelessly, so that the mounting workability is improved and the safety during the operation is also improved.

  And since the U-shaped part 21u is provided in the both ends of the car body weight 20, a work space is ensured in the U-shaped part 21u. Therefore, attachment workability can be further improved. Specifically, a work space for driving the fixing pin P into the bracket 23 can be secured sufficiently, and workability until the car body weight 20 is attached and fixed to the car body 17 can be improved. Furthermore, since the fastening seats 22 are provided at the four corners of the weight main body 21 (both ends of the U-shaped portion 21u), the car body weight 20 can be lifted in a stable state, so that safety during work is further improved. .

  Further, since the car body weight 20 is attached to the car body 17 with the jack 19 placed in the retracted position, the traveling state in which the crawler 18 is moved in the direction of the car body 17 in advance to reduce the width of the crawler crane 11. However, the car body weight 20 can be attached to the crawler crane 11. Accordingly, the crawler crane 11 can be made to be able to travel even in a narrow place with the car body weight 20 attached.

  Here, the modification of a car body weight and its attachment method is demonstrated. First, a 1st modification is demonstrated, referring FIGS. 11-13. FIG. 11 is a plan view of a car body weight according to a first modification. FIG. 12 is a side view of the car body weight according to the first modification. FIG. 13: shows the front view of the car body weight which concerns on a 1st modification.

  Unlike the car body weight 20 described above, the car body weight 120 according to the first modification can be divided. Specifically, as shown in FIGS. 11 to 13, the weight main body 121 is divided into two parts, and the weight main body 121 </ b> A and the weight main body 121 </ b> B are coupled together via coupling flanges 125, 125. Yes. The weight main body 121A is configured by welding iron plate-like bodies 121a, 121b, and 121c. Similar to the weight main body 21, the weight main body 121 </ b> A has a U-shaped portion 21 u and a fastening seat 22, a bracket 23, and a lifting member 24. A coupling flange 125 is provided on the end surface opposite to the U-shaped portion 21u of the weight main body 121A. The weight main body 121B has the same basic structure as the weight main body 121A except that the number of lifting members 24 is different.

  Such weight main bodies 121A and 121B are integrated by aligning the respective connecting flanges 125 and 125 and fastening them with bolts to constitute the weight main body 121. Therefore, disassembly and assembly can be performed very easily.

  Thus, according to the car body weight 120, the car body weight 120 can be disassembled (divided into two parts). Therefore, if there is a weight limit during transportation, it can be transported with a weight within the limit by disassembling and transporting.

  The car body weight 120 can be attached to the crawler crane 11 by the same procedure as the car body weight 20 described above. Therefore, according to the car body weight 120 and the mounting method thereof according to the first modification, the car body weight 120 is attached to the car body 17 by using the jack 19 provided in the crawler crane 11 without using a companion crane. Can be attached.

  Next, a second modification will be described with reference to FIGS. 14 and 15. FIG. 14 is a plan view of a car body weight according to a second modification. FIG. 15 is a side view of a car body weight according to a second modification.

  The car body weight 220 according to the second modification has the same basic structure as the car body weight 20 described above, except that the fastening member also serves as a lifting member. Specifically, as shown in FIGS. 14 and 15, the fastening members 222 provided at the four corners of the weight main body 121 have the same shape as the lifting member 24. Thereby, the fastening member 222 functions also as a lifting member.

  Thus, according to the car body weight 220, the structure can be greatly simplified. In addition, since it is difficult for the fastening member 222 having such a shape to be directly fastened to the tip portion of the jack 19, the adapter 230 shown in FIGS. 16 and 17 is attached to the tip portion of the jack 19, and the adapter The jack 19 and the fastening member 222 are fastened through 230. The adapter 230 includes a jack mounting portion 231 that is mounted on the tip of the jack 19 and pin-fixed, and a bracket portion 232 that is pin-fixed to the fastening member 222. The car body weight 220 is fastened to the distal end portion of the jack 19 through such an adapter 230. Since such an adapter 230 is used, a bracket 223 for fixing the car body weight 220 to the car body 17 is also slightly different from the bracket 23 described above. That is, the height of the bracket 223 is higher than that of the bracket 23.

  Next, a procedure for attaching the car body weight 220 to the car body 17 of the crawler crane 11 will be described with reference to FIGS. In the following, differences from the procedure for mounting the car body weight 20 will be described, and description of similar procedures will be omitted as appropriate.

  First, as shown in FIG. 18, the adapter 230 is attached to the tip of the jack 19. Specifically, the jack mounting portion 231 of the adapter 230 is disposed with respect to the tip portion of the jack 19, and the retaining pin 235 is inserted into the neck portion of the tip portion of the jack 19, so that the adapter 230 is attached to the jack 19. (See FIG. 21).

  Next, in the same manner as described above, the crawler crane 11 is self-propelled and straddles the car body weight 220 disposed at a predetermined position on the ground, and the jack 19 is extended as shown in FIGS. 19 (a) and 19 (b). Then, the adapter 230 and the fastening member 222 of the car body weight 220 are aligned. Specifically, the pin hole of the bracket part 232 of the adapter 230 is matched with the pin hole of the fastening member 222. 20 and 21, a fixing pin 236 is driven into each pin hole of the bracket portion 232 and the fastening member 222, and the jack 19 and the car body weight 220 are connected via the adapter 230 and the fastening member 222. Join.

  Thereafter, as shown in FIGS. 22A and 22B, the jack 19 is contracted to raise the car body weight 220 from the ground. That is, the four jacks 19 are simultaneously operated and contracted to the shortest, and the car body weight 220 is lifted from the ground. As a result, the pin holes of the bracket 223 of the car body weight 220 and the connecting arm 17c provided on the car body 17 are matched with each other, so that the fixing pin P is driven into each pin hole, and the car body weight 220 is attached to the car body 17. Fix it. Thereby, the car body weight 220 can be firmly fixed to the car body 17. Therefore, even if the weight of the car body weight 220 acts on the jack 19, oil in the cylinder of the jack 19 leaks and the jack 19 extends to prevent the car body weight 220 from dropping to the ground. be able to.

  Thus, according to the car body weight 220 and the mounting method thereof according to the second modified example, the car body weight 220 is mounted on the car body by using the jack 19 provided on the crawler crane 11 without using the phase crane. It can be attached to the body 17.

  As described above, according to the method for attaching the crawler crane 11 and the car body weight 20 (120, 220) according to the present embodiment, the jack 19 provided on the crawler crane 11 can be provided without using a phase crane. By using the front end of the jack 19 and the fastening seat 22 (fastening member 222) provided on the car body weight 20 (120, 220) to fasten the jack 19 to the shortest, the car body weight 20 ( 120, 220) can be attached to the car body 17.

  Further, since the car body weights 20 (120, 220) are not lifted by the phase crane (lifted by the jack 19), the car body weights 20 (120, 220) do not move carelessly during the mounting operation. Therefore, the mounting workability is improved and the safety during work is also improved.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. In the above-described embodiment, the case where the present invention is applied to a crawler crane is illustrated as an example of a construction machine. However, the present invention can also be applied to a construction machine (for example, an earth drill) including a crawler disassembly jack. it can.

  Moreover, although the car body weight which cannot be divided in the above-described second modified example is illustrated, the second modified example can also be configured to be divided as in the first modified example.

11 Crawler crane 12 Lower traveling body 13 Upper turning body
17 Car body
17c Connecting arm 18 Crawler
19 Jack
20 Car body weight 21 Weight body 21a Iron plate 21b Iron plate 21c Iron plate 22 Fastening seat (fastening member)
23 bracket 24 lifting member 120 car body weight 121A weight main body 121B weight main body 121a iron plate-like body 121b iron plate-like body 121c iron plate-like body 125 coupling flange 220 car body weight 222 fastening member 223 bracket 230 adapter 231 jack mounting portion 232 Bracket P Fixing pin

Claims (7)

In a construction machine comprising a crawler and a jack for removing the crawler,
The car body weight attached to the construction machine is
A weight body formed of an iron plate,
A fastening member provided on the weight body and fastened to a tip portion of the jack;
A bracket for pinning the weight body to the car body;
And a suspension member for conveying the car body weight. In the construction machine according to claim 1,
At both ends in the longitudinal direction of the weight body, a U-shaped portion is formed by cutting out the center in the short direction,
The construction machine, wherein the fastening members are respectively provided at both ends of the U-shaped part. In the construction machine according to claim 2,
The construction machine characterized in that the bracket is provided at the bottom of the U-shaped part. In any one construction machine as described in Claims 1-3,
The construction machine is characterized in that the fastening member is provided at a position where the jack can be fastened with a tip portion of the jack in a state where the jack is moved to a retracted position that fits within a width of the car body. The construction machine according to any one of claims 1 to 4,
The construction machine, wherein the fastening member also serves as the suspension member. In any one construction machine as described in Claim 1-5,
The construction machine according to claim 1, wherein the weight main body is divided into a plurality of parts and joined together by a joining means. In the mounting method of the car body weight attached to the car body of the construction machine including the crawler and the jack for removing the crawler,
A positioning step of aligning the tip and the fastening member provided on the car body weight by extending the jack over the car body weight placed on the ground by self-propelling a construction machine;
A fastening step of fastening the tip of the jack and the fastening member;
A levitation step of shrinking the jack to levitate the car body weight from the ground;
And a fixing step of fixing the car body weight to the car body via a bracket provided on the car body weight levitated from the ground.

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