JP7330819B2 - construction machinery - Google Patents

Description

The present invention relates to construction machinery.

Patent Literature 1 discloses a mobile crane. In such a mobile crane, the boom is erected during work, and a load is lifted by a hook or the like suspended from the tip of the boom. At this time, a counterweight is attached to a side of the revolving structure opposite to the side where the tip portion of the boom is located with respect to the center of revolving. By installing the counterweight, stability is ensured when the load is lifted.

JP 2018-203434 A

In the work site, when the work at a certain point is completed, it is necessary to move the mobile crane to the next work point. At this time, in a mobile crane that performs work with a counterweight attached as in Patent Document 1, from the viewpoint of work efficiency, etc., the counterweight is not removed from the mobile crane, and the counterweight is mounted separately from the crane. There is a need to transport cranes and counterweights without transporting the weights between work sites. That is, it is required to move the mobile crane at the work site with the counterweight installed on the mobile crane.

Also, in movement at a work site, the width of the vehicle that can pass through may be restricted by buildings and the like. Therefore, there is a demand for a mobile crane that can be moved even with a counterweight mounted on a work site with a narrow road width.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its object is to provide a construction machine that can be moved in a work site with a narrow road even with a counterweight mounted thereon.

In order to achieve the above object , one aspect of the present invention is a construction machine capable of mounting a main weight and a sub-weight detachably connected to the main weight, comprising: a traveling vehicle body; a revolving body that is connected so as to be able to turn against it; a weight installation portion that is provided on the traveling vehicle body and on which a main weight can be installed ; The base frame has a bottom wall, the bottom wall has an upper surface of the frame facing vertically upward, a sub-weight can be installed on the upper surface of the frame , and the base frame is attached to the bottom wall from the vertically lower side. With legs, the base frame is attached to the traveling vehicle body by the frame legs so that the bottom wall does not come into contact with the traveling vehicle body .

According to the present invention, it is possible to provide a construction machine that can be moved in a work site with a narrow road width even when the counterweight is mounted.

FIG. 1 is a schematic diagram showing the mobile crane according to the first embodiment with an additional weight attached to the main weight and the main weight and the sub weight installed on the traveling vehicle body. FIG. 2 is a schematic diagram showing the mobile crane according to the first embodiment in a state in which the revolving body is turned 180° or approximately 180° from the state shown in FIG. 1 and the main weight is connected to the revolving body. . FIG. 3A is a schematic diagram showing a state in which an additional weight is connected from inside the main weight according to the first embodiment. FIG. 3B is a schematic diagram showing a state in which an additional weight is connected from the outside of the main weight according to the first embodiment. FIG. 4 is a schematic diagram showing the mobile crane according to the first embodiment in a state in which an additional weight is attached from the outside of the main weight and the main weight and the sub weight are installed on the traveling vehicle body. FIG. 5 is a schematic diagram showing a state in which the base frame according to the first embodiment is installed on the traveling vehicle body, and the sub-weight is installed on the base frame. FIG. 6 is a perspective view schematically showing the upper surface of the traveling vehicle body on which the base frame according to the first embodiment is installed. FIG. 7 is a schematic diagram showing a state in which the base frame according to the first embodiment is installed on the traveling vehicle body. FIG. 8 is a perspective view schematically showing a base frame according to the first embodiment; FIG. 9 is a perspective view schematically showing the base frame according to the first embodiment viewed from a direction different from that of FIG. 8. FIG. 10 is a perspective view schematically showing an enlarged part of FIG. 5. FIG. FIG. 11 is a perspective view schematically showing a state in which the base frame according to the first embodiment is installed on the traveling vehicle body and the bottom plate is installed on the base frame. 12 is a perspective view schematically showing an enlarged part of FIG. 11. FIG. 13 is a perspective view schematically showing an enlarged part of FIG. 11, different from FIG. 12. FIG.

An embodiment of the invention will be described with reference to FIGS. 1-13.

FIG. 1 is a diagram showing a mobile crane 1 of this embodiment. As shown in FIG. 1 , the mobile crane 1 includes a traveling vehicle body 2 and a revolving body 3 provided on the traveling vehicle body 2 . A base frame 14 is provided on the upper side of the rear portion of the traveling vehicle body 2 . The traveling vehicle body 2 is provided with a pair of outriggers 5A on both left and right sides of the front side portion, and a pair of outriggers 5B on both left and right sides of the rear side portion. During work, the outriggers 5A and 5B are extended in the width direction of the traveling vehicle body 2, and the outriggers 5A and 5B are grounded on the ground to support the traveling vehicle body 2. The revolving body 3 has an operator's cab (cab) 6 . A base end of a telescopic boom 7 is connected to the revolving body 3 . The telescopic boom 7 can be raised and lowered with respect to the revolving body 3 . Also, the revolving body 3 and the telescopic boom 7 revolve around the revolving axis P together with respect to the traveling vehicle body 2 . Further, the revolving body 3 is provided with an actuator 8 .

A mobile crane 1 is provided with a counterweight 10 . The counterweight 10 includes a main weight 11, a subweight (first subweight) 12A2, a subweight (second subweight) 12B2, additional weights 12A1 and 12B1, and a top weight 13. The main weight 11 can be mounted on the traveling vehicle body 2 by the weight mounting portion 11A. The subweights 12A2 and 12B2 can be installed on the base frame 14. As shown in FIG. The top weight 13 is attached to the revolving body 3 independently of the main weight 11 and sub-weights 12A2 and 12B2. Therefore, the top weight 13 rotates together with the rotating body 3 . The top weight 13 is attached to the rear portion of the revolving body 3 and positioned on the opposite side of the revolving body 3 with respect to the revolving axis P to the tip of the telescopic boom 7 .

FIG. 2 shows a state in which the main weight 11 is connected to the revolving body 3 by turning the revolving body 3 by 180° or approximately 180° from the state shown in FIG. 1 . In FIG. 2, the sub-weights 12A2 and 12B2 are in a non-mounted state. By rotating the revolving body 3 by 180° or approximately 180° from the state shown in FIG. In a state such as the state shown in FIG. 2 where the front side of the revolving body 3 matches or substantially matches the rear side of the traveling vehicle body 2 , the main weight 11 can be lifted from the traveling vehicle body 2 by operating the actuator 8 . The main weight 11 is attached to the revolving body 3 in a state where the main weight 11 is lifted by the actuator 8 . At this time, the top weight 13 is already attached to the revolving body 3 . By attaching the main weight 11 to the revolving body 3 , the main weight 11 can revolve together with the revolving body 3 , the telescopic boom 7 and the top weight 13 .

In the operation of the mobile crane 1, the telescopic boom 7 is erected with the main weight 11 attached to the revolving body 3. As shown in FIG. Then, a load is lifted by a hook (not shown) or the like suspended from the tip of the telescopic boom 7 . At this time, since the counterweight 10 is mounted on the rotating body 3 on the side opposite to the side on which the tip of the telescopic boom 7 is located with respect to the rotating shaft P, stability is ensured when the load is lifted.

FIG. 3A shows a state in which the additional weights 12A1 and 12B1 are connected from the inside of the main weight 11. FIG. Similarly, FIG. 3B shows a state in which the additional weights 12A1 and 12B1 are connected to the main weight 11 from outside. An additional weight (first additional weight) 12A1 and an additional weight (second additional weight) 12B1 are detachably connected to the main weight 11 . The main weight 11 is formed with a groove 11B along the front-rear direction in the central portion in the width direction. Sub-weights 12A2 and 12B2 are detachably connected to the main weight 11. As shown in FIG. The additional weights 12A1 and 12B1 can be connected to the main weight 11 from either the outside or the inside. Further, when the additional weights 12A1 and 12B1 are not connected to the main weight 11 from the outside, the sub-weights 12A2 and 12B2 can be connected from the outside of the main weight 11. For example, when the additional weights 12A1 and 12B1 are connected to the main weight 11 from the inside, the sub-weights 12A2 and 12B2 can be connected from the outside of the main weight 11.

When the additional weights 12A1 and 12B1 are connected from the inside of the main weight 11 and the sub-weights 12A2 and 12B2 are installed on the base frame 14, the additional weights 12A1 and 12B1 or the sub-weights 12A2 and 12B2 are connected from the outside of the main weight 11. The vehicle width of the mobile crane 1 is narrower than when the two are connected. Therefore, the mobile crane 1 can easily pass through a place where the width of the vehicle through which it can pass is limited.

FIG. 4 shows a state in which the additional weights 12A1 and 12B1 are connected from the outside of the main weight 11 in the mobile crane 1 of this embodiment. The telescopic boom 7 can be inserted into the groove 11B of the main weight 11 when the additional weights 12A1 and 12B1 are not connected from the inside of the main weight 11 . When the telescopic boom 7 is inserted into the groove 11B, the vehicle height of the mobile crane 1 is lower than when the telescopic boom 7 is not inserted into the groove 11B. For this reason, by moving the mobile crane 1 through the work site with the telescopic boom 7 inserted into the groove 11B, the mobile crane 1 can easily pass through places where the vehicle height that can pass through is restricted. be.

FIG. 5 shows a state in which the sub-weights 12A2 and 12B2 are installed on the base frame 14. As shown in FIG. Here, the front-back direction of the base frame 14 (directions indicated by arrows X1 and X2) and the width direction of the base frame 14 (directions indicated by arrows W1 and W2) are defined. The front-rear direction of the base frame 14 intersects (perpendicular or substantially perpendicular to) the vertical direction (directions indicated by arrows V1 and V2). The width direction of the base frame 14 intersects (perpendicularly or substantially perpendicularly) the vertical direction and intersects (perpendicularly or substantially perpendicularly) the front-rear direction of the base frame 14 . As shown in FIG. 1 and the like, the base frame 14 is configured such that the front-rear direction matches or substantially matches the front-rear direction of the running vehicle body 2 and the width direction matches or substantially matches the width direction of the running vehicle body 2 . is installed in

FIG. 6 shows the position where the base frame 14 is installed in the traveling vehicle body 2 as seen from the vertical upper side. The traveling vehicle body 2 includes a vehicle body upper surface 21, bases 22A and 22B, and bosses 23A and 23B. The vehicle body upper surface 21 faces vertically upward. The vehicle body upper surface 21 extends along the front-rear direction. The vehicle body upper surface 21 is flat or substantially flat. The bases 22</b>A, 22</b>B are arranged such that their longitudinal directions match or substantially match the longitudinal direction of the traveling vehicle body 2 . The bases 22A and 22B are provided on the upper surface 21 of the vehicle body and separated from each other in the width direction. The bases 22A, 22B are arranged with their longitudinal directions parallel or substantially parallel to each other. The protruding portion 22A1 is provided on the front side of the base 22A and protrudes in the width direction toward the side where the base 22B is arranged. The protrusion 22B1 is provided on the front side of the base 22B and protrudes in the width direction toward the side where the base 22A is arranged. The bases 22A and 22B have the same or substantially the same vertical dimension.

The bosses 23A and 23B are arranged on the upper surface 21 of the vehicle body so as to be spaced apart from each other in the width direction. The bosses 23A and 23B are arranged on the front side with respect to the bases 22A and 22B in the front-rear direction. The boss 23A (23B) includes a base portion 23A1 (23B1) and an insertion portion 23A2 (23B2). The base portion 23A1 (23B1) is formed in a disc shape or a substantially disc shape. The vertical dimension of the base 23A1 (23B1) matches or substantially matches that of the base 22A (22B). The insertion portion 23A2 (23B2) protrudes vertically upward (to the arrow V1 side) from the base portion 23A1 (23B1). The insertion portion 23A2 (23B2) is formed in a conical or substantially conical shape. The insertion portion 23A2 (23B2) has a radial dimension smaller than that of the base portion 23A1 (23B1).

FIG. 7 is a schematic diagram showing a state in which the base frame 14 according to the first embodiment is installed on the traveling vehicle body. FIG. 8 is a perspective view schematically showing the base frame 14 according to the first embodiment. FIG. 9 is a perspective view schematically showing the base frame 14 according to the first embodiment viewed from a direction different from that of FIG.

As shown in FIGS. 7-9, the base frame 14 has a bottom wall 140 . The bottom wall 140 has an upper surface (frame upper surface) 141 facing vertically upward (arrow V1 side) and a lower surface facing vertically downward (arrow V2 side). In this embodiment, the bottom wall 140 is formed with a hole 145 penetrating the bottom wall 140 in the vertical direction. The hole 145 is formed in the central portion of the bottom wall 140 in the front-rear direction and width direction. The dimension of the bottom wall 140 is smaller than the vehicle width of the traveling vehicle body 2 in the width direction. Therefore, when the base frame 14 is installed on the upper surface 21 of the traveling vehicle body 2 , the base frame 14 does not protrude from the vehicle width of the traveling vehicle body 2 .

Frames 142A to 142D are arranged on the frame upper surface 141 of the base frame 14 . The frames 142A to 142D are arranged along the circumferential direction of the base frame 14 and arranged so as not to protrude from the outer edge of the bottom wall 140. As shown in FIG. In the bottom wall 140, sub-weights 12A2 and 12B2 can be installed on the frame upper surface 141 portion surrounded by the frames 142A to 142D. In this embodiment, the frames 142A to 142D are arranged on the outer peripheral side of the opening edge of the hole 145. As shown in FIG. Also, with the sub-weights 12A2 and 12B2 installed on the frame upper surface 141, the dimensions of the frames 142A to 142D in the vertical direction are smaller than the dimensions of the sub-weights 12A2 and 12B2.

Frames 142A-142D include connection pieces 140A-140C. The connection piece 140A protrudes further forward from the front surface of the frame 142A. The connection piece 140B protrudes from the surface of the frame 142B on one side in the width direction (the side of the arrow W2) toward one side in the width direction. The connection piece 140C protrudes further rearward from the rear surface of the frame 142C. The connection pieces 140A-140C are arranged in a state that they do not protrude from the upper ends of the frames 142A-142D in the vertical direction. The connection pieces 140A to 140C are provided parallel or substantially parallel to the bottom wall 140. As shown in FIG. The connection pieces 140A to 140C are O-shaped or substantially O-shaped when viewed from the vertical direction.

The base frame 14 has a portion of the bottom wall 140 that protrudes further outward than the frames 142A to 142D. Holes 149A1 and 149A2 are formed in portions that protrude forward from the frame 142A. The base frame 14 is installed on the traveling vehicle body 2 by engaging the bosses 23A and 23B provided on the traveling vehicle body 2 with the holes 149A1 and 149A2. In the present embodiment, engaging portions 143B, 143C, and 144B, which will be described later, are arranged in portions of the frame upper surface 141 that protrude from the frame 142B to one side in the width direction (the arrow W2 side). Engagement portions 143A, 143D, and 144A, which will be described later, are arranged in portions of the frame upper surface 141 that protrude from the frame 142C toward the other side in the width direction (the arrow W1 side).

The base frame 14 is provided with engaging portions 143A to 143D, 144A and 144B. The engaging portions 143B, 143C, and 144B extend from the surface of the frame 142B facing one side in the width direction (the side of the arrow W2) toward one side in the width direction. Similarly, the engaging portions 143A, 143D, and 144A extend further toward the other widthwise side from the surface of the frame 142D facing the other widthwise side (arrow W1 side). In this embodiment, the engaging portions 143A to 143D, 144A, and 144B are extended without protruding from the outer edge of the bottom wall 140. As shown in FIG. A hook 171, which will be described later, can be attached to the engaging portions 143A and 143B. Therefore, in this embodiment, with the sub-weights 12A2 and 12B2 installed on the base frame 14, the sub-weights 12A2 and 12B2 are lashed to the base frame 14 by the bands 173 attached to the hooks 171. FIG.

Also, by hooking a rope (not shown) or the like on the engaging portions 143A to 143D, the base frame 14 alone can be lifted. Furthermore, even in a state in which the floor plate 18, which will be described later, is provided on the upper surface 141 of the frame, the base frame 14 and the floor plate 18 are lifted together (integrally suspended) by hooking a rope or the like on the engaging portions 143A, 143B, 144A, and 144B. ) is possible.

The plate 147 is attached to the bottom wall 140 from the opposite side of the top surface 141 of the frame, that is, from the vertically downward side (arrow V2 side). As a result, the range in which the first floor plate fixing member 15, which will be described later, rotates vertically downward (toward the arrow V2) with respect to the frame 142D is restricted. That is, the first floor plate fixing member 15 can be rotated only vertically upward (to the arrow V1 side) from the upper surface of the plate 147 .

The frame legs 148A, 148B extend parallel or substantially parallel to each other along the width direction. The frame legs 148A, 148B are provided so as not to protrude from the outer edge of the bottom wall 140. As shown in FIG. In this embodiment, the frame legs 148A and 148B sandwich a hole 145 formed in the bottom wall 140 in the front-rear direction. The frame legs 148A and 148B are attached to the bottom wall 140 from the vertically lower side (arrow V2 side). The vertical dimensions of the frame legs 148A, 148B match or substantially match the vertical dimensions of the bases 22A, 22B and bases 23A1, 23B1 described above. The frame legs 148A, 148B are arranged so as not to overlap the bases 22A, 22B and the bases 23A1, 23B1 when the base frame 14 is mounted on the upper surface 21 of the vehicle body. By attaching the base frame 14 to the vehicle body upper surface 21 as described above, the bottom wall 140 becomes parallel or substantially parallel to the vehicle body upper surface 21 . The provision of the frame legs 148A and 148B on the base frame 14 makes it difficult for the bottom wall 140 to bend in the vertical direction. Further, since contact between the bottom wall 140 and the vehicle body upper surface 21 of the traveling vehicle body 2 can be prevented, the vehicle body upper surface 21 is less likely to be damaged.

The first floor plate fixing member 15 is attached to the frame 142D via a hinge 157. As shown in FIG. The first floor plate fixing member 15 is rotatable around the hinge 157 . The connection piece 155 protrudes forward from the first floor plate fixing member 15 . A pin 156 is engaged with the connecting piece 155 . Therefore, loss of the pin 156 is effectively prevented. As shown in FIG. It is arranged in the closed state (stored state). In the retracted state, the first floor plate fixing member 15 is arranged so as not to protrude from the upper end of the frame 142D in the vertical direction. Therefore, the revolving body 3 can revolve without coming into contact with the first floor plate fixing member 15 .

The second floor plate fixing member 16 includes a relay portion 161 and leg portions 164A and 164B. The leg portions 164A and 164B are separated from each other in the extension direction of the relay portion 161 . The second floor plate fixing member 16 is U-shaped or substantially U-shaped. When the second sole plate fixing member 16 is not used, that is, when it is stored in the base frame 14 (stored state), it is attached to the base frame 14 via the relay portion 161 . The second sole plate fixing member 16 is detachably attached to the base frame 14 by pins 163A and 163B. Also, the second sole plate fixing member 16 is stored in the base frame 14 without contacting the revolving body 3 . As described above, in the base frame 14, the sub-weights 12A2 and 12B2 are provided on the frame upper surface 141 and surrounded by the frames 142A-142D. The sub-weights 12A2 and 12B2 are provided on the frame upper surface 141 with the long side surfaces 12A21 and 12B21 in contact with each other. In this embodiment, the short side surfaces 12A23 and 12B23 are in contact with the surface of the frame 142A facing the rear side. By installing the sub-weights 12A2 and 12B2 on the base frame 14, the sub-weights 12A2 and 12B2 are positioned. As a result, even if the revolving body 3 revolves, the sub-weights 12A2 and 12B2 and the revolving body 3 do not come into contact with each other.

FIG. 10 is an enlarged schematic view of a part of the state in which the base frame 14 according to the first embodiment is installed on the traveling vehicle body 2 and the sub-weights 12A2 and 12B2 are installed on the base frame 14. It is a perspective view showing. Hook 171 is attached to engaging portion 143A. In this embodiment, the hook 171 is hooked on the hanging ring 172 and attached to the engaging portion 143A via the hanging ring 172 . The band 173 is attached to the hook 171 and placed in contact with the upper surfaces 12A22 and 12B22 of the subweights 12A2 and 12B2. Similarly, a hook 171 to which a band 173 is attached is also attached to the engaging portion 143B. Thereby, the band 173 can press the upper surfaces 12A22 and 12B22 of the sub weights 12A2 and 12B2 from vertically above. Also, the bottom surfaces of the sub-weights 12A2 and 12B2 can press the frame top surface 141. As shown in FIG. Therefore, the sub-weights 12A2 and 12B2 can be lashed to the base frame 14 by the bands 173. As shown in FIG. By lashing the sub-weights 12A2 and 12B2 to the base frame 14 in this manner, the sub-weights 12A2 and 12B2 can be prevented from dropping off from the mobile crane 1 .

FIG. 11 is a perspective view schematically showing a state in which the base frame 14 according to the first embodiment is installed on the traveling vehicle body 2 and the bottom plate 18 is installed on the base frame 14. FIG. 12 is a perspective view schematically showing an enlarged part of FIG. 11. FIG. 13 is a perspective view schematically showing an enlarged part of FIG. 11, different from FIG. 12. FIG.

When the sub-weights 12A2 and 12B2 are not provided on the frame upper surface 141, the base frame 14 can mount the bottom plate 18 thereon. In this case as well, the base frame 14 is installed on the traveling vehicle body 2 by engaging the bosses 23A and 23B provided on the traveling vehicle body 2 with the holes 149A1 and 149A2.

The sole plate 18 is arranged between the tips of the outriggers 5A, 5B and the ground when the outriggers 5A, 5B contact the ground. The bottom plate 18 is installed on the frame upper surface 141 and surrounded by the frames 142A to 142D. In this embodiment, a plurality of sole plates 18 can be installed on the frame upper surface 141 .

As shown in FIG. 11 and the like, when the sole plate 18 is provided on the frame upper surface 141, the first sole plate fixing member 15 is rotated about 180° or 180° around the hinge 157 from the retracted state described above. It is placed in a state (use state). When the first floor plate fixing member 15 is in use, the connection piece 155 is engaged with the connection piece 140A by the pin 156 . Therefore, the floor plate 18 is restricted from vertically upward movement by the first floor plate fixing member 15 .

Further, the second floor plate fixing member 16 is removed from the above-described stored state, and attached so that the relay portion 161 is positioned vertically above the floor plate 18 . In the present embodiment, the leg portion 164B is positioned on the rear side with respect to the sole plate 18, and the leg portion 164A is positioned on one side (arrow W2 side) in the width direction. Legs 164A and 164B of the second sole plate fixing member 16 are engaged with connecting pieces 140B and 140C by pins 163A and 163B. Due to the configuration as described above, the floor plate 18 is restricted from moving vertically upward by the relay portion 161, and is restricted from moving rearward by the leg portion 164B.

The sole plate 18 is restricted from moving in the longitudinal direction, the width direction and the vertical direction by the first sole plate fixing member 15, the second sole plate fixing member 16, the frames 142A to 142D, and the frame upper surface 141. Therefore, the mobile crane 1 can travel with the bottom plate 18 installed on the base frame 14 .

In this embodiment, in the mobile crane 1, the additional weights 12A1 and 12B1 are connected to the main weight 11 from the inside, and when the sub-weights 12A2 and 12B2 are installed on the base frame 14, the weight from the outside of the main weight 11 The vehicle width of the mobile crane 1 is narrower than when the additional weights 12A1, 12B1 or the subweights 12A2, 12B2 are connected. Therefore, the mobile crane 1 can easily pass through a place where the width of the vehicle through which it can pass is limited.

Further, in the mobile crane 1 in this embodiment, the additional weights 12A1 and 12B1 are connected to the main weight 11 from outside. The telescopic boom 7 can be inserted into the groove 11B of the main weight 11 when the additional weights 12A1 and 12B1 are not connected from the inside of the main weight 11. - 特許庁In this case, the vehicle height of the mobile crane 1 is lower than when the telescopic boom 7 is not inserted into the groove 11B. For this reason, by moving the mobile crane 1 through the work site with the telescopic boom 7 inserted into the groove 11B, the mobile crane 1 can easily pass through places where the vehicle height that can pass through is restricted. be.

Further, in this embodiment, the sub-weights 12A2 and 12B2 are surrounded by the frames 142A to 142D when they are placed on the frame upper surface 141. As shown in FIG. The sub-weights 12A2 and 12B2 are in contact with each other at their long sides 12A21 and 12B21, and at their short sides 12A23 and 12B23 in contact with the rear-facing surface of the frame 142A. As a result, the sub-weights 12A2 and 12B2 are positioned, and the sub-weights 12A2 and 12B2 do not come into contact with the revolving body 3 even when the revolving body 3 revolves.

Further, in this embodiment, the base frame 14 is installed on the traveling vehicle body 2, and the sub-weights 12A2 and 12B2 are installed on the base frame 14. As shown in FIG. The hook 171 is attached to the engaging portions 143A and 143B. A band 173 attached to the hook 171 is placed in contact with the upper surfaces 12A22 and 12B22 of the sub-weight. As a result, the band 173 can press the upper surfaces 12A22 and 12B22 of the sub-weights vertically from above. Also, the bottom surfaces of the sub-weights 12A2 and 12B2 can press the frame top surface 141. As shown in FIG. Therefore, the sub-weights 12A2 and 12B2 can be lashed to the base frame 14 by the bands 173. As shown in FIG. Thereby, the sub-weights 12A2 and 12B2 can be prevented from dropping off from the mobile crane 1.

Further, in the present embodiment, the sole plate 18 can be installed on the base frame 14 when the sub weights 12A2 and 12B2 are not installed on the base frame 14. FIG. The sole plate 18 is fixed to the frame upper surface 141 by the frames 142A to 142D, the first sole plate fixing member 15, and the second sole plate fixing member 16. As shown in FIG. As a result, the mobile crane 1 can travel with the bottom plate 18 mounted thereon, so that the functionality of the mobile crane 1 is improved.

It should be noted that the present invention is not limited to the above-described embodiments, and can be variously modified in the implementation stage without departing from the gist of the invention. Moreover, each embodiment may be implemented in combination as much as possible, and in that case, the combined effect can be obtained. Furthermore, the above-described embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements.

DESCRIPTION OF SYMBOLS 1... Mobile crane, 2... Traveling vehicle body, 3... Revolving body, 10... Counterweight, 11... Main weight, 11A... Weight installation part, 12A2... Sub weight, 12B2... Sub weight, 14... Base frame.

Claims (6)

A construction machine capable of mounting a main weight and a sub-weight detachably connected to the main weight,
a running vehicle;
a revolving body that is rotatably connected to the traveling vehicle body on the traveling vehicle body;
a weight installation portion provided on the traveling vehicle body and capable of installing the main weight;
a base frame mounted on the traveling vehicle body at a position away from the weight mounting portion ;
and
the base frame has a bottom wall,
The bottom wall has a frame upper surface facing vertically upward, and the sub-weight can be installed on the frame upper surface,
The base frame has frame legs that are attached to the bottom wall from a vertical lower side,
The base frame is attached to the traveling vehicle body by the frame legs in a state in which the bottom wall does not come into contact with the traveling vehicle body.
construction machinery. The weight installation portion is arranged on the traveling vehicle body on the front side of the revolving body,
The base frame is installed on the traveling vehicle body on the rear side of the revolving body,
The construction machine according to claim 1. 3. The construction machine according to claim 1, wherein said base frame is capable of installing, on said top surface of said frame, a sole plate laid between an outrigger and the ground in a state in which said sub-weight is not installed on said top surface of said frame. The base frame has an engaging portion for hooking the band,
The band restrains the sub-weight installed on the upper surface of the frame in a state of being caught by the engaging portion.
The construction machine according to any one of claims 1 to 3. the base frame includes a pair of frame legs as the frame legs,
The base frame is formed with a hole penetrating the bottom wall in the vertical direction,
the pair of frame legs are arranged with the hole in the bottom wall therebetween;
The construction machine according to any one of claims 1 to 4. The traveling vehicle body includes a boss arranged on the traveling vehicle body,
The bottom wall of the base frame is formed with an engagement hole that can be engaged with the boss,
The base frame is mounted on the traveling vehicle body by engaging the engagement hole of the bottom wall with the boss,
The base frame is mounted on the traveling vehicle body in a state in which the frame legs do not overlap the bosses.
The construction machine according to any one of claims 1 to 5.