JP2018122977A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine which enables a worker to easily move in an area between a pair of side frames through a carrier weight and enables improvement of transportability and assemblability of the carrier weight.SOLUTION: A crane base carrier 12 includes: a truck frame 50; a left side frame 511 and a right side frame 521; a front weight 53 and a rear weight 54; and scaffolding members 63. The front weight 53 and the rear weight 54 are respectively disposed at the front side and the rear side of the truck frame 50. The scaffolding members 63 can change their postures between a protruding posture where the scaffolding members 63 form a movement passage between the pair of side frames and a storage posture where the scaffolding members 63 are disposed so as to overlap with the front weight 53 and the rear weight 54.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a construction machine having a pair of left and right side frames.

  2. Description of the Related Art Conventionally, as a mobile construction machine such as a crawler crane, one having an upper swing body and a lower traveling body is known. The lower traveling body includes a track frame and a pair of left and right side frames connected to the track frame. The upper swing body includes a work device and is supported by the track frame of the lower traveling body so as to be swingable.

  Patent Document 1 discloses a technique in which a lower weight is disposed between a pair of side frames in order to improve the stability of a machine body of a construction machine. In this technique, the track frame includes a jackup cylinder and a jack beam that supports the jackup cylinder. The lower weight is supported by a jack beam.

  The lower weight includes a lower weight and a pair of upper weights. The pair of upper weights are fixed to the upper surface portion of the lower weight with a space in the left-right direction. Both end portions in the left-right direction of the upper weight are arranged close to the pair of side frames, respectively. As a result, a movement passage is formed between the pair of side frames through the lower weight.

JP 2006-219241 A

  In the technique described in Patent Document 1, a pair of upper weights are respectively attached to both end portions of the upper surface portion of the lower weight. The pair of upper weights are arranged so as to largely protrude from the lower weight to the left and right. For this reason, when the lower weight is transported in a pre-assembled state, the space that the lower weight occupies on the loading platform of the transport vehicle increases, and it becomes difficult to carry the mixed transportation of the lower weight and other members. there were. On the other hand, in the above technique, the lower weight may be assembled at the work site after the lower weight and the upper weight are transported in a state of being separated from each other. In this case, since it is necessary to sequentially attach a pair of upper weights to the lower weights at the work site, there has been a problem that the assembly of the lower weights deteriorates.

  The present invention has been made in view of the above problems, and allows an operator to easily move between a pair of side frames through a traveling body weight, and improves transportability and assemblability of the traveling body weight. An object of the present invention is to provide a construction machine that can be used.

  A construction machine according to one aspect of the present invention is a construction machine including a lower traveling body that is movable on the ground and an upper revolving body that is pivotally supported by the lower traveling body, the lower traveling body. Is a track frame that includes a front surface portion and a rear surface portion, and that supports the upper revolving body and a pair of side frames that respectively support the circularly movable footwear so as to extend in the front-rear direction from the track frame. Between a pair of left and right side frames respectively connected to both ends in the left and right direction of the track frame, and a pair of front and rear traveling respectively disposed between the pair of left and right side frames on the front side and the rear side of the track frame Body weights and a pair of front and rear scaffolding members respectively attached to the pair of traveling body weights, and the pair of front and rear traveling body weights Scaffolding upper surface portion, each comprising a weight upper surface portion and a pair of weight side surfaces disposed to face the pair of side frames, respectively, and the scaffold member can be disposed to face upward Further, the scaffold upper surface portion faces upward, the scaffold member extends so as to protrude to the side frame side from the weight side surface, and the scaffold upper surface portion and the weight upper surface portion extend in the left-right direction. A projecting attitude that is arranged so as to be continuous with each other, wherein a projecting attitude that forms a movement passage that allows an operator to move between the pair of side frames together with the upper surface portion of the weight; An accommodation posture that is arranged to be separated from the side frame inward in the left-right direction with respect to the posture, wherein the scaffold member A housing orientation arranged so as to overlap the weights side, and is capable posture changed between.

  According to this configuration, the moving passage is formed between the pair of side frames by the traveling body weight and the scaffold member. For this reason, the worker can easily move between the pair of side frames. In addition, the scaffold member can be changed in posture between a projecting posture that forms the movement passage and a housing posture in which the protruding amount toward the side frame is smaller than the projecting posture. For this reason, the traveling body weight can be transported in a state in which the scaffold member in the accommodation posture is mounted on the traveling body weight. Therefore, the space in which the scaffold member occupies the loading platform of the transport vehicle is reduced as compared with the case where the scaffold member in the protruding posture is attached to the traveling body weight. For this reason, the mixed transportation of the traveling body weight and other members is facilitated, and the transportation performance of the traveling body weight can be improved. Further, since the scaffold member is attached to the traveling body weight at the transportation stage, the assembling property of the lower traveling body at the work site can be improved.

  In the above configuration, it is desirable that the pair of front and rear traveling body weights be connected to the front surface portion and the rear surface portion of the track frame between the pair of left and right side frames.

  According to this configuration, the pair of front and rear traveling body weights can be stably supported by the track frame.

  In the above configuration, it is preferable that the scaffold member includes a scaffold rear surface portion facing downward in the protruding posture, and the scaffold rear surface portion is disposed so as to overlap the weight side surface in the accommodation posture.

  According to this structure, the space which a traveling body weight and a scaffold member occupy on the loading platform of a transport vehicle can be reduced.

  In the above configuration, it is desirable that the scaffold upper surface portion is disposed so as to overlap the weight upper surface portion in the accommodation posture.

  According to this structure, the space which a traveling body weight and a scaffold member occupy on the loading platform of a transport vehicle can be reduced.

  In the above-described configuration, the traveling body weight includes a support member that supports the scaffold member including a fulcrum portion, and the scaffold member rotates about the fulcrum portion as a fulcrum so that the protruding posture and the accommodating posture are provided. It is desirable to change posture between

  According to this configuration, the posture change of the scaffold member can be easily realized by the rotation operation around the fulcrum portion.

  In the above configuration, the traveling body weight includes a lower weight having a lower upper surface portion facing upward, and an upper weight having an upper upper surface portion facing upward and mounted on the lower upper surface portion of the lower weight, An upper weight, wherein both end portions in the left-right direction of the upper weight are flush with both end portions in the left-right direction of the lower weight, or on the inner side in the left-right direction than both end portions in the left-right direction of the lower weight; When the scaffold member is in the projecting posture, the upper upper surface portion and the scaffold upper surface portion of the upper weight preferably form the movement passage.

  According to this configuration, the traveling weight is further separated, so that the transportation performance of the traveling weight is further improved.

  In the above configuration, the track frame is disposed on each of the front surface portion and the rear surface portion, and includes a frame side connection portion that is connected to the travel body weight, and the travel body weight is connected to the frame side connection portion. A weight side connecting portion, and the weight side surface is disposed with a space in the left-right direction with respect to the side frame, and an operator can move the frame side connecting portion and the front side from the front or rear of the traveling body weight. It is desirable that a connecting passage allowing access to the weight side connecting portion is formed along the front-rear direction below the scaffold member and between the weight side surface and the side frame.

  According to this configuration, the operator can access the frame side connection portion and the weight side connection portion from the front or rear of the traveling body weight through the connection passage. For this reason, in the configuration in which the traveling body weight is connected to the front surface portion or the rear surface portion of the track frame, it is possible to easily realize the connection work between them.

  In the above configuration, the frame-side connecting portion has a first through hole opened in the left-right direction, and the weight-side connecting portion has a second through-hole opened in the left-right direction. Preferably, the lower traveling body further includes a connecting pin that is inserted through the first through hole and the second through hole and connects the traveling body weight and the track frame to each other.

  According to this configuration, the traveling body weight and the track frame can be easily connected by the connecting pin.

  Said structure WHEREIN: It is desirable for the said traveling body weight to be equipped with the accommodating part which can accommodate the said connection pin.

  According to this configuration, loss of the connecting pin is prevented in a state where the traveling body weight is not connected to the track frame.

  In the above configuration, it is preferable that the storage portion is disposed on at least one of the pair of weight side surfaces and the side surface of the traveling body weight opposite to the track frame in the front-rear direction. .

  According to this configuration, the operator can take out the connecting pin from the storage portion and quickly reach the frame side connecting portion and the weight side connecting portion.

  ADVANTAGE OF THE INVENTION According to this invention, while a worker can move easily between a pair of side frames through a traveling body weight, the construction machine which can improve the transportability and assembly property of a traveling body weight is provided. Is done.

1 is a side view of a construction machine according to a first embodiment of the present invention. It is a top view of the lower traveling body of the construction machine concerning a 1st embodiment of the present invention. It is a rear view of the lower traveling body of the construction machine concerning a 1st embodiment of the present invention. It is side sectional drawing of the lower traveling body of the construction machine which concerns on 1st Embodiment of this invention. It is a top view of the running body weight and scaffold member concerning a 1st embodiment of the present invention. It is a rear view of the running body weight and scaffold member concerning a 1st embodiment of the present invention, and is a rear view in the state where a scaffold member opened. It is a rear view of the running body weight and scaffold member concerning a 1st embodiment of the present invention, and is a rear view in the state where a scaffold member closed. FIG. 6 is an enlarged plan view in which a part of FIG. 5 is enlarged. It is the expansion rear view which expanded a part of FIG. It is the expanded sectional view which expanded a part of lower traveling body of Drawing 4. It is a top view of the running body weight and scaffold member concerning a 2nd embodiment of the present invention, and is a top view in the state where the scaffold member opened. It is a rear view of the running body weight and scaffold member concerning a 2nd embodiment of the present invention, and is a rear view in the state where the scaffold member opened. It is a side view of the traveling body weight of FIG. 12, and a scaffold member. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a top view of the running body weight and scaffold member concerning a 2nd embodiment of the present invention, and is a top view in the state where the scaffold member closed. It is a rear view of the running body weight and scaffold member concerning a 2nd embodiment of the present invention, and is a rear view in the state where the scaffold member closed. FIG. 18 is a side view of the traveling body weight and the scaffold member of FIG. 17.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a crane 10 (construction machine) according to a first embodiment of the present invention. In the following, in each figure, directions of “up”, “down”, “left”, “right”, “front” and “rear” are shown, but the directions are related to the present embodiment. It is shown for convenience in order to describe the structure of the crane 10 and the assembling method, and does not limit the structure, assembling method, usage mode, etc. of the construction machine according to the present invention.

  The crane 10 includes an upper swing body 11 corresponding to the crane body, a lower traveling body 12 that can move the upper swing body 11 and that can move on the ground, a boom 13 that functions as a hoisting member, and a boom hoist. A lattice mast 14 that is a member for use and a box mast 15 are provided.

  The boom 13 is rotatably supported by the upper swing body 11 so as to be able to rise and fall around a horizontal axis. The lattice mast 14 is rotatably supported by the upper swing body 11 around a rotation axis parallel to the rotation axis of the boom 13 at a position on the rear side of the boom 13. The lattice mast 14 serves as a support column for the rotation of the boom 13. The box mast 15 has a base end and a rotation end (tip), and is rotatably connected to the upper swing body 11 on the rear side of the lattice mast 14. The rotation axis of the box mast 15 is arranged in parallel with the rotation axis of the boom 13 and at substantially the same position as the rotation axis of the lattice mast 14.

  The crane 10 further includes a lower spreader 18, an upper spreader 19, a guy line 20, a boom hoisting rope 21, and a boom hoisting winch 22. The guy line 20 is connected to the upper spreader 19 and the tip of the boom 13. The boom hoisting rope 21 is pulled out from the boom hoisting winch 22 and hung on the first mast sheave 141 and the second mast sheave 142 at the tip of the lattice mast 14, and then the sheave block of the lower spreader 18 and the sheave block of the upper spreader 19. Multiple times between and. The boom hoisting winch 22 changes the distance between the sheave block of the lower spreader 18 and the sheave block of the upper spreader 19 by winding and unwinding the boom hoisting rope 21, and the boom 13 is moved relative to the lattice mast 14. The boom 13 is raised and lowered while rotating relatively.

  Further, the crane 10 includes a guy line 23, a mast hoisting rope 24, and a mast hoisting winch 25. The guy line 23 connects the tip of the lattice mast 14 and the rotating end of the box mast 15. The mast hoisting rope 24 is hung a plurality of times between a sheave block 26 disposed on the upper swing body 11 and a sheave block 27 disposed on a rotating end portion of the box mast 15. The mast hoisting winch 25 winds and unwinds the mast hoisting rope 24 and changes the distance between the sheave block 26 and the sheave block 27. As a result, the lattice mast 14 is raised and lowered while the box mast 15 and the lattice mast 14 rotate integrally with the upper swing body 11.

  The crane 10 is mounted with a main winding winch 30 and an auxiliary winding winch 31 for winding and lowering a suspended load. The main winding winch 30 performs lifting and lowering of the suspended load by the main winding rope 32. A main hook 34 for hanging load is connected to the main winding rope 32 suspended from the tip of the boom 13. When the main winding winch 30 winds and unwinds the main winding rope 32, the main hook 34 is wound and unwound. Similarly, the auxiliary winding winch 31 performs lifting and lowering of the suspended load by the auxiliary winding rope 33.

  A counterweight 35 for adjusting the balance of the crane 10 is loaded at the rear of the upper swing body 11, and a pallet weight 36 is further disposed behind the upper swing body 11.

  Next, the structure of the lower traveling body 12 of the crane 10 according to the present embodiment will be further described in detail. FIG. 2 is a plan view of the lower traveling body 12 of the crane 10 according to the present embodiment. FIG. 3 is a rear view of the lower traveling body 12. FIG. 4 is a side sectional view of the lower traveling body 12.

  The lower traveling body 12 includes a track frame 50, a left crawler unit 51, a right crawler unit 52, a front weight 53 (traveling body weight), a rear weight 54 (traveling body weight), and a plurality of connecting portions 56. And a pair of front and rear scaffold members 63.

  The track frame 50 is disposed at the center of the lower traveling body 12 and has a function of supporting the upper swing body 11. The track frame 50 has a substantially rectangular parallelepiped shape including a front surface portion 501 and a rear surface portion 502. Further, a revolving body shaft support 500 is disposed on the upper surface of the track frame 50. The upper swing body 11 is rotatably mounted on the swing body shaft support 500.

  The left crawler unit 51 and the right crawler unit 52 are connected to the left and right sides of the track frame 50. The left crawler unit 51 includes a left side frame 511 (side frame), a left driving roller 512, a left driven roller 513, a left crawler shoe 514 (footwear), and a left frame connecting portion 515. Similarly, the right crawler unit 52 includes a right side frame 521 (side frame), a right drive roller 522, a right driven roller 523, a right crawler shoe 524 (footwear), and a right frame connecting portion 525. .

  The left side frame 511 and the right side frame 521 respectively support the left crawler shoe 514 and the right crawler shoe 524 so as to be able to move around. The left side frame 511 and the right side frame 521 are respectively connected to both left and right ends of the track frame 50 so as to extend in the front-rear direction from the track frame 50 through the left frame connection portion 515 and the right frame connection portion 525, respectively. The The left side frame 511 and the right side frame 521 constitute a pair of left and right side frames of the present invention. The left driving roller 512 and the right driving roller 522 are rotatably supported by the front end portions of the left side frame 511 and the right side frame 521, respectively, and receive the driving force of a driving mechanism (not shown) to receive the left crawler shoe 514 and the right crawler. The shoe 524 is driven around. The left driven roller 513 and the right driven roller 523 are rotatably supported at the rear end portions of the left side frame 511 and the right side frame 521.

  The front weight 53 and the rear weight 54 are arranged on the front side and the rear side of the track frame 50 between the left side frame 511 and the right side frame 521, respectively. Specifically, the front weight 53 and the rear weight 54 are connected to the front surface portion 501 and the rear surface portion 502 of the track frame 50 between the left side frame 511 and the right side frame 521, respectively. These weights are attached to the truck frame 50 in order to maintain the balance of the crane 10. The front weight 53 and the rear weight 54 constitute a pair of front and rear traveling body weights according to the present invention. The front weight 53 and the rear weight 54 are connected to the track frame 50 at a plurality of connecting portions 56 in FIG. Each of the connecting portions 56 includes an upper connecting portion 561 and a lower connecting portion 562 (see FIG. 4). In other embodiments, the front weight 53 and the rear weight 54 are provided between the left side frame 511 and the right side frame 521 via the other support members, respectively, and the front portion 501 and the rear portion of the track frame 50. 502 may be coupled.

  The pair of front and rear scaffold members 63 are attached to the front weight 53 and the rear weight 54, respectively. In the present embodiment, two scaffold members 63 are attached to the front weight 53 and the rear weight 54, respectively. That is, the pair of front and rear scaffold members 63 includes a pair of scaffold members 63, respectively.

  In the present embodiment, the structure of the front weight 53 and the rear weight 54, and the connection structure of these weights to the track frame 50 are the same. Therefore, hereinafter, the structure of the rear weight 54, and the rear weight 54 and A connection structure with the track frame 50 will be described as an example. FIG. 5 is a plan view of the rear weight 54 and the scaffold member 63 according to the present embodiment. FIG. 6 is a rear view of the rear weight 54 and the scaffold member 63, and is a rear view of the scaffold member 63 in an open state (protruding posture).

  The rear weight 54 includes a weight body 60 and a ladder 57 (FIG. 2).

  The weight main body 60 is a heavy object having a substantially rectangular parallelepiped shape. The weight main body 60 includes a weight upper surface portion 60T facing upward and a pair of weight side surfaces (weight right side surface 60L, weight left side surface 60R) (FIG. 3). The weight upper surface portion 60T is an upper surface portion of the weight main body 60. The weight right side 60L and the weight left side 60R are the right and left sides of the weight body 60, respectively.

  The weight body 60 includes a lower weight 61 and an upper weight 62.

  The lower weight 61 is a heavy object having a substantially rectangular parallelepiped shape and constitutes the lower end side of the weight main body 60. The lower weight 61 includes a lower weight upper surface portion 61T (FIG. 6) (lower upper surface portion) facing upward, a pair of side surfaces (lower weight left side surface 61L and lower weight right side surface 61R: FIG. 6), and an opposing surface 610 (FIG. 4). The lower weight left side surface 61L and the lower weight right side surface 61R are disposed to face the left side frame 511 and the right side frame 521, respectively. The facing surface 610 connects the lower weight left side surface 61L and the lower weight right side surface 61R in the left-right direction, and is disposed to face the rear surface portion 502 of the track frame 50 (FIG. 4).

  The lower weight 61 further includes a pair of left and right upper weight connecting portions 611 (weight side connecting portions), a pair of left and right lower weight connecting portions 613 (weight side connecting portions), and a pair of left and right storage portions 615 (FIG. 3). And comprising. The upper weight connecting portion 611 and the lower weight connecting portion 613 constitute the connecting portion 56 (FIG. 2) of this embodiment.

  The pair of upper weight connecting portions 611 (FIG. 5) are arranged so as to protrude from the upper end portion of the facing surface 610 toward the track frame 50 (see FIG. 10). The pair of upper weight connecting portions 611 are arranged at intervals in the left-right direction. Each upper weight connecting portion 611 includes two plate-like portions and a shaft portion 612 arranged so as to connect the two plate-like portions. The upper weight connecting portion 611 is connected to the upper frame connecting portion 503 of the track frame 50.

  The pair of lower weight connecting portions 613 (FIG. 5) is disposed so as to protrude from the lower end portion of the facing surface 610 toward the track frame 50 (see FIG. 10). The pair of lower weight connecting portions 613 are arranged at intervals in the left-right direction. Each lower weight connecting portion 613 is composed of one plate-like portion. In addition, a through-hole 613S (second through-hole) (FIG. 10) is opened in the lower weight connecting portion 613 along the left-right direction. The lower weight connecting portion 613 is connected to the lower frame connecting portion 504 of the track frame 50.

  The pair of left and right storage portions 615 (FIG. 3) are respectively disposed at the lower ends of the lower weight left side surface 61L and the lower weight right side surface 61R. The storage portion 615 has a cylindrical shape, the upper end portion of the storage portion 615 is opened, and the lower end portion of the storage portion 615 is closed by the bottom portion. In the storage portion 615, a connection pin P1 (see FIGS. 10 and 11) that connects the lower weight 61 and the track frame 50 can be stored. Therefore, in the state where the rear weight 54 is not connected to the track frame 50, the connection pin P1 is prevented from being lost.

  The upper weight 62 is a plate-like heavy object that is detachably attached to the lower weight upper surface portion 61T of the lower weight 61 and constitutes the upper end side of the weight body 60. The upper weight 62 includes an upper surface portion (upper upper surface portion) facing upward. As an example, in this embodiment, the upper weight 62 is a 2.5-ton heavy object. As described above, the rear weight 54 can be separated into two upper and lower weights, so that the transportability of the rear weight 54 is improved. In the present embodiment, both end portions (side surfaces) of the upper weight 62 in the left-right direction are parallel to both end portions in the left-right direction of the lower weight 61 (lower weight left side surface 61L, lower weight right side surface 61R). Are arranged in one. In other embodiments, both end portions (side surfaces) in the left-right direction of the upper weight 62 may be disposed more inside in the left-right direction than both end portions in the left-right direction of the lower weight 61.

  The pair of scaffold members 63 attached to the rear weight 54 is supported by the weight right side surface 60L and the weight left side surface 60R of the weight body 60, respectively. Specifically, the pair of scaffold members 63 are supported on the side surfaces of both ends of the upper weight 62 in the left-right direction. The scaffold member 63 includes an upper surface portion (scaffold upper surface portion) that can face upward, and a lower surface portion (scaffold back surface portion) that can face downward. The scaffold member 63 is mainly composed of a metal plate material, and a plurality of holes are opened in the scaffold member 63. The hole portion enables the weight of the scaffold member 63 to be reduced, and mud or the like attached to the worker's shoes falls from the hole portion of the scaffold member 63, so that slipping when the worker moves is suppressed. . As an example, in this embodiment, one scaffold member 63 has a weight of 100 kg, and is made of a metal member that is lighter than the upper weight 62 described above.

  In the present embodiment, the scaffold member 63 can be changed in posture between the protruding posture and the storage posture. FIG. 7 is a rear view of the rear weight 54 and the scaffold member 63 according to the present embodiment, and is a rear view of the scaffold member 63 in a closed state (storage posture). FIG. 8 is an enlarged plan view in which a part of FIG. 5 is enlarged. FIG. 9 is an enlarged rear view in which a part of FIG. 7 is enlarged. As shown in FIG. 5, the pair of scaffold members 63 are supported by the upper weight 62 at the support portions 62 </ b> S at the two front and rear portions.

  As shown in FIGS. 5 and 8, each support portion 62 </ b> S is arranged so that the corner portion of the scaffold member 63 faces the notch portion 63 </ b> K that is partially cut away.

  The upper weight 62 further includes a support bracket 621 (support member) (FIGS. 8 and 9). The support bracket 621 is fixed to the side surfaces of the upper weight 62 (upper end portions of the weight right side surface 60L and the weight left side surface 60R) by a plurality of fastening bolts SV. The support bracket 621 includes two support plates 621 </ b> A that protrude toward the scaffold member 63. The two support plates 621A are arranged at intervals in the front-rear direction. As shown in FIG. 9, when viewed from the rear, the support plate 621A is a plate material having a substantially triangular shape. Each support plate 621A has three holes Q1, Q2 and Q3. The interval between the holes Q1 and Q2 is set equal to the interval between the holes Q1 and Q3. The hole Q1 constitutes a fulcrum part of the present invention.

  On the other hand, the scaffold member 63 includes a supported plate 631 that protrudes from the end face of the notch 63K toward the upper weight 62. The supported plate 631 is inserted between the two supporting plates 621A (FIG. 8). Two holes (not shown) are opened in the supported plate 631 so as to face the holes Q1 and Q2 of the support plate 621A. As shown in FIG. 8, the scaffold member 63 is in the projecting posture as shown in FIGS. The fixing pin R1 is inserted and fixed in the part Q1. Further, the fixing pin R2 is inserted and fixed in the hole opened on the base end side of the supported plate 631 and the hole Q2 of the pair of support plates 621A. As a result, the scaffold member 63 is supported by the upper weight 62 in a protruding posture.

  On the other hand, when the fixing pin R2 is detached from the hole opened to the base end side of the supported plate 631 and the hole Q2 of the pair of support plates 621A, and the distal end side of the scaffold member 63 is rotated downward, the scaffold The member 63 is in the storage posture shown in FIG. At this time, the fixing pin R1 (FIG. 8) inserted into the hole Q1 in FIG. 9 serves as a fulcrum (rotation center) in the rotation of the scaffold member 63. When the scaffold member 63 is in the storage position, the fixing pin R2 is inserted and fixed in the hole opened on the base end side of the supported plate 631 and the hole Q3 (FIG. 9) of the pair of support plates 621A. . As a result, the scaffold member 63 is fixed and supported on the upper weight 62 in the storage posture.

  5 and FIG. 6, the upper surface portion of the scaffold member 63 faces upward, and the pair of scaffold members 63 is located on the right side frame 521 and the left side of the weight main body 60 with respect to the right side surface 60L and the left side surface 60R. It becomes the attitude | position extended so that it may each protrude to the side frame 511 side. At this time, both ends in the left-right direction of the pair of scaffold members 63 are disposed close to the left side frame 511 and the right side frame 521 with a predetermined interval. Furthermore, the upper surface portion of the pair of scaffold members 63 and the weight upper surface portion 60T of the weight main body 60 are arranged so as to be connected to each other along the left-right direction. As a result, the pair of scaffold members 63 form a movement passage that allows the operator to move between the pair of side frames (the left side frame 511 and the right side frame 521) together with the weight upper surface portion 60T.

  On the other hand, in the storage posture shown in FIG. 7, the pair of scaffold members 63 are arranged farther inward in the left-right direction from the pair of side frames than in the protruding posture. Furthermore, the lower surface portions (scaffold rear surface portions) of the pair of scaffold members 63 in the protruding posture are arranged so as to overlap the weight right side surface 60L and the weight left side surface 60R, respectively, in the accommodated posture (FIG. 7).

  The ladder 57 (FIG. 2) can be mounted on the upper surface portion of the upper weight 62 of the rear weight 54, and allows the operator to move between the ground and the upper surface portion of the rear weight 54.

  FIG. 10 is an enlarged cross-sectional view in which a part of the lower traveling body 12 of FIG. 4 is enlarged. The track frame 50 further includes a pair of upper frame connecting portions 503 (frame side connecting portions) (FIG. 10) and a pair of lower frame connecting portions 504 (frame side connecting portions) (see FIG. 10) provided on the rear surface portion 502. 10). A similar connecting portion is also provided on the front surface portion 501 of the track frame 50 (FIG. 4). These connecting portions constitute the connecting portion 56 (FIG. 2) of the present embodiment.

  The pair of upper frame connecting portions 503 are plate-like portions that protrude from the upper end portion of the rear surface portion 502 of the track frame 50 toward the lower weight 61. The pair of upper frame connecting portions 503 are arranged at an interval in the left-right direction. The upper frame connecting portion 503 is composed of a single plate-like portion. As shown in FIG. 10, the upper frame connecting portion 503 includes a groove portion 503S. The shaft portion 612 of the above-described upper weight connection portion 611 is fitted into the groove portion 503S, so that the upper weight connection portion 611 and the upper frame connection portion 503 are connected to each other.

  Similarly, the pair of lower frame connecting portions 504 are plate-like portions protruding from the lower end portion of the rear surface portion 502 of the track frame 50. The pair of lower frame connecting portions 504 are arranged at an interval in the left-right direction. Each lower frame connecting portion 504 includes two plate-like portions. A through hole 504S (first through hole) is opened in each plate-like portion (FIG. 10). The lower frame connecting portion 504 is connected to the lower weight connecting portion 613 of the lower weight 61.

  When the rear weight 54 is connected to the track frame 50 of the lower traveling body 12, first, the upper weight 62 is attached to the lower weight 61 at a position away from the track frame 50. The upper weight 62 lifted by an auxiliary crane (not shown) is placed on the upper surface portion 61T of the lower weight 61. Then, on the left and right sides of the lower weight 61, the lower weight 61 and the upper weight 62 are fixed to each other by a plurality of connecting pins, whereby the rear weight 54 is assembled. Further, as described above, the pair of scaffold members 63 are fixed to the upper weight 62 by the plurality of fixing pins.

  Thereafter, the rear weight 54 is lifted by the auxiliary crane via the three hooks 62F (FIG. 5) and moved so as to approach the rear surface portion 502 of the track frame 50. Soon, the shaft portion 612 (FIG. 10) of the lower weight 61 is fitted into the groove portion 503 </ b> S of the upper frame connecting portion 503 of the track frame 50. Thereafter, the connecting pin P1 is inserted and fastened into the through hole 613S of the lower weight connecting portion 613 and the through hole 504S of the lower frame connecting portion 504, whereby the rear weight 54 is connected to the track frame 50. The rear weight 54 is supported by the track frame 50. Thus, in the present embodiment, the rear weight 54 and the track frame 50 can be easily connected by the connecting pin P1.

  When the rear weight 54 is connected to the track frame 50, as described above, the movement that allows the operator to move between the pair of side frames through the upper surface portion of the pair of scaffold members 63 and the upper surface portion of the upper weight 62. A service passage is formed. For this reason, the operator can easily move between the pair of side frames through the upper surfaces of the scaffold member 63 and the upper weight 62. Furthermore, in this embodiment, since the upper surface portions of the pair of scaffold members 63 and the upper weight 62 extend so as to be continuous with each other in the left-right direction, the movement of the worker is realized safely and easily. The same effect can be obtained with the front weight 53.

  Further, in this embodiment, the scaffold members 63 of the front weight 53 and the rear weight 54 are between the protruding posture that forms the movement passage and the accommodating posture in which the protruding amount toward each side frame is smaller than the protruding posture. The posture can be changed. For this reason, the front weight 53 and the rear weight 54 can be transported in a state where the scaffold member 63 in the accommodation posture is mounted on the weight body 60 of each weight. Therefore, the assemblability of the front weight 53 and the rear weight 54 at the work site after transport can be improved as compared with the case where the scaffold member 63 and each weight are transported individually. Further, as compared with the case where the scaffold member in the protruding posture is attached to the traveling body weight, the space in which the front weight 53, the rear weight 54, and the scaffold member 63 occupy the loading platform of the transport vehicle is reduced. In addition, it becomes easy to transport the weights together with other members, and the weight transportability can be improved.

  Further, in the present embodiment, the lower surface portions (scaffold rear surface portions) of the pair of scaffold members 63 in the protruding posture are arranged so as to overlap the weight right side surface 60L and the weight left side surface 60R, respectively, in the accommodated posture (FIG. 7). For this reason, the space which the scaffold member 63 with which the front side weight 53 and the back side weight 54 are mounted occupies on the loading platform of a transport vehicle can be reduced. Further, the posture change of the scaffold member 63 can be easily realized by the rotation operation around the hole Q1 of the support bracket 621 of the support portion 62S.

  2 and 3, in this embodiment, the connection passage is provided so that the operator can easily access the connection portion 56 (FIG. 2) from the rear of the rear weight 54. AW (FIG. 3) is formed. The connecting passage AW is formed below the scaffold member 63 and between the right side surface 60L and the left side frame 511 and between the left side surface 60R and the right side frame 521 along the front-rear direction. ing. In this embodiment, since the connecting passage AW is secured, the pair of left and right side surfaces of the lower weight 61 (the lower weight left side surface 61L and the lower weight right side surface 61R) are respectively connected to the pair of side frames. They are arranged at intervals in the left-right direction. In other words, as shown in FIGS. 3 and 6, the lower weight 61 and the pair of scaffold members 63 are arranged in the left-right direction so that the rear weight 54 has a T-shape that forms the connection passage AW. The width is set. The lower weight left side surface 61L and the lower weight right side surface 61R of the lower weight 61 also have a function of defining one side portion of the connecting passage AW. For this reason, the worker can reach the connecting portion 56 by moving toward the track frame 50 along the side surface of the lower weight 61. An operator who reaches between the track frame 50 and the rear weight 54 through the connection passage AW extends his / her arm in the left-right direction with the connection pin P1 held, thereby P1 can be inserted. Thus, in this embodiment, the operator can access the frame side connecting portion and the weight side connecting portion from the front or rear of the traveling body weight through the connecting passage AW. For this reason, in the configuration in which the traveling body weight is connected to the front surface portion 501 or the rear surface portion 502 of the track frame 50, the connecting operation of both can be easily realized. Further, the operator can easily connect the traveling body weight (the front weight 53 and the rear weight 54) and the track frame 50 by the connection P1 pin.

  Further, in the present embodiment, the storage portion 615 is provided on the lower weight left side surface 61L and the lower weight right side surface 61R. For this reason, the operator can take out the connection pin P1 from the storage portion 615 while entering the connection passage AW. Note that, as in the second embodiment described later, the storage portion 615 may be provided on the rear surface portion of the lower weight 61 (the side surface on the front side in FIG. 3). Also in this case, the operator can take out the connecting pin P1 from the storage portion 615 and quickly reach the connecting portion 56 through the connecting passage AW.

  In addition, when the connecting pin P1 is stored in the storage unit 615, it is desirable that the shape of the storage unit 615 is set so that a part of the connection pin P1 is exposed from the storage unit 615. In this case, the storage portion 615 is disposed on any one of the lower weight left side surface 61L, the lower weight right side surface 61R, and the rear surface portion of the lower weight 61, so that the operator can connect the connection pin P1 to the connection portion 56. Whether or not it is attached can be easily confirmed in the storage portion 615.

  In the present embodiment, as shown in FIGS. 2 and 4, a ladder 57 can be attached to the upper weight 62 of the rear weight 54 (front weight 53). For this reason, the operator can move directly onto the upper weight 62 from the ground. In other words, the upper weight 62, the left side frame 511, and the right side from the ground are compared with other weight structures that move from the ground to the lower weight 61 and then move from the lower weight 61 to the upper weight 62. Accessibility to the frame 521 is improved. The ladder 57 may be attached to the scaffold member 63.

  Next, a construction machine according to a second embodiment of the present invention will be described. In the present embodiment, the configuration of the rear weight 54 (front weight 53) is different from that of the first embodiment, and therefore, the difference will be mainly described. Moreover, in each drawing, the same code | symbol as FIGS. 1-10 is attached | subjected about the member provided with the function and structure similar to 1st Embodiment. FIG. 11 is a plan view of the rear weight 54 and the pair of scaffold members 64 according to the present embodiment, and is a plan view of the pair of scaffold members 64 in an open state. FIG. 12 is a rear view of the rear weight 54 and the pair of scaffold members 64, and is a rear view of the scaffold member 64 in an opened state. 13 is a side view of the rear weight 54 and the pair of scaffold members 64 in FIG. FIG. 14 is a cross-sectional view taken along the line AA in FIG. 15 is a cross-sectional view taken along the line BB in FIG. FIG. 16 is a rear view of the rear weight 54 and the pair of scaffold members 64, and is a plan view of the scaffold member 64 in a closed state. FIG. 17 is a rear view of the rear weight 54 and the pair of scaffold members 64, and is a rear view of the scaffold member 64 in a closed state. 18 is a side view of the rear weight 54 and the pair of scaffold members 64 in FIG.

  As shown in FIG. 11, each of the pair of scaffold members 64 according to the present embodiment has a substantially trapezoidal shape in plan view. As shown in FIG. 11, in the present embodiment, the storage portion 615 described above is disposed at both ends of the rear surface portion of the upper weight 62. In the present embodiment, the lower traveling body 12 includes a rear weight 54 and a pair of scaffold members 64. The rear weight 54 includes a weight body 60 and a plurality of support members 65 (FIG. 12). The weight body 60 includes a lower weight 61 and an upper weight 62.

  With reference to FIGS. 12 to 14, the lower weight 61 includes a plurality of lower weight connection plates 614. Further, the upper weight 62 includes a plurality of upper weight connection plates 623. The plurality of lower weight connection plates 614 (FIG. 12) are disposed so as to protrude from the upper ends of the lower weight left side surface 61L and the lower weight right side surface 61R along the left-right direction. Although not shown in FIG. 13, as shown in FIG. 16, a plurality of lower weight connection plates 614 are arranged at intervals in the front-rear direction on each of the lower weight left side surface 61L and the lower weight right side surface 61R. ing. The lower weight connection plate 614 is used to connect the lower weight 61 and the upper weight 62. A through hole (not shown) is opened in the lower weight connection plate 614 along the front-rear direction.

  The plurality of upper weight connection plates 623 are disposed so as to protrude downward from the side surface portion of the upper weight 62. As shown in FIG. 16, a plurality of upper weight connection plates 623 are arranged at intervals in the front-rear direction on each of the right and left sides of the upper weight 62. In addition, two upper weight connection plates 623 are arranged at positions sandwiching the lower weight connection plate 614 of the lower weight 61 in the front-rear direction. The upper weight connection plate 623 is used to connect the lower weight 61 and the upper weight 62. A through hole (not shown) is opened in the upper weight connection plate 623 along the front-rear direction. The connection weight P2 (FIGS. 12 and 13) is sequentially inserted into the through hole of the lower weight connection plate 614 of the lower weight 61 and the through hole of the upper weight connection plate 623 of the upper weight 62, thereby rear weight. The lower weight 61 and the upper weight 62 are connected to each other on both the left and right sides of 54. As shown in FIG. 12, since the left and right upper weight connection plates 623 are arranged at positions sandwiching the lower weight 61, the upper weight 62 can be easily arranged at the mounting position with respect to the lower weight 61. it can.

  Referring to FIGS. 15 and 16, weight body 60 includes a plurality of hinges 64 </ b> H (support members). The plurality of hinges 64 </ b> H are arranged at intervals in the front-rear direction at both left and right end portions of the upper surface portion of the upper weight 62. The plurality of hinges 64H support the pair of scaffold members 64 so as to be rotatable. That is, each hinge 64H includes the fulcrum portion of the present invention. By rotating the scaffold member 64 around the hinge 64H, the scaffold member 64 can change its posture between the protruding posture and the housing posture.

  As shown in FIG. 16, the lower weight connection plate 614 and the upper weight connection plate 623 are provided so that the lower weight connection plate 614 and the upper weight connection plate 623 do not hinder the rotation operation of the scaffold member 64. Is formed with an opening 64J in which the scaffold member 64 is partially cut away.

  Further, referring to FIGS. 13 and 15, the scaffold member 64 includes a plurality of ribs 64 </ b> L arranged at intervals in the front-rear direction. The plurality of ribs 64 </ b> L have a function of maintaining the rigidity of the scaffold member 64. Also, a bolt mounting portion 64M (FIG. 15) is disposed in a region facing the lower weight 61 in the lower end portion of each rib 64L. A female hole (not shown) is formed in the bolt mounting portion 64M. As shown in FIG. 15, the positioning bolt TV is mounted in the female hole portion of the bolt mounting portion 64M from the lower weight 61 side, so that the screw head of the positioning bolt TV is exposed to the lower weight 61 side. . On the other hand, the lower weight 61 includes a plurality of receiving portions 61M having a rectangular parallelepiped shape arranged at intervals in the front-rear direction. The scaffold member 64 is positioned by the screw head of the positioning bolt TV coming into contact with the receiving portion 61M.

  13 and 14, the plurality of support members 65 support the scaffold member 64 by connecting the distal end side of the scaffold member 64 and the lower weight left side surface 61L and the lower weight right side surface 61R of the lower weight 61. It has a function. One end of the column member 65 is fixed to the scaffold side mounting portion 64V (FIG. 14) of the scaffold member 64, and the other end of the column member 65 is fixed to the weight side mounting portion 61V (FIG. 14) of the lower weight 61. The In addition, as shown in FIG. 11, the front end side of the outer side edge in the left-right direction of the pair of scaffold members 64 is inclined inward. For this reason, the positions in the left-right direction of the scaffolding side mounting portions 64V arranged adjacent to each other in the front-rear direction are different. As a result, as shown in FIG. 12, when the rear weight 54 is viewed from the rear, the plurality of support members 65 are inclined at different angles, so that the mounting state of the support members 65 can be easily confirmed. Can do.

  Also in the present embodiment, in the protruding posture shown in FIGS. 11 to 15, the pair of scaffold members 64 are closer to the right side frame 521 and the left side frame 511 than the weight right side surface 60L and the weight left side surface 60R of the weight body 60. Each of the postures extends so as to protrude. At this time, both ends in the left-right direction of the pair of scaffold members 64 are disposed close to the left side frame 511 and the right side frame 521 with a predetermined interval. Furthermore, the upper surface portion (scaffold upper surface portion) of the pair of scaffold members 64 and the weight upper surface portion 60T (upper upper surface portion) of the weight main body 60 are arranged so as to be connected to each other along the left-right direction. As a result, the pair of scaffold members 64 form a movement passage that allows the operator to move between the pair of side frames (the left side frame 511 and the right side frame 521) together with the weight upper surface portion 60T.

  On the other hand, in the storage posture shown in FIGS. 16 to 18, the pair of scaffold members 64 are disposed farther inward in the left-right direction from the pair of side frames than in the protruding posture. Further, the upper surface portion (scaffold upper surface portion) of the scaffold member 64 in the protruding posture is disposed so as to overlap the weight upper surface portion 60T in the accommodated posture (FIGS. 16 to 18).

  In the present embodiment, when the pair of scaffold members 64 is in the retracted posture, the outer surfaces 64T of the respective scaffold members 64 are disposed so as to contact each other as shown in FIG. For this reason, at the time of transporting the rear side weight 54, vibration and rattling of the pair of scaffold members 64 are prevented. Also in the present embodiment, since the connection passage AW (FIGS. 2 and 3) similar to the first embodiment is formed, the connection between the rear weight 54 and the track frame 50 is easily realized. The

  The construction machine (crane 10) according to each embodiment of the present invention has been described above. The present invention is not limited to these forms. As the construction machine according to the present invention, the following modified embodiments are possible.

  (1) Although the above embodiment has been described using the crane 10 as a construction machine, the present invention is not limited to this. The construction machine according to the present invention may include other aspects such as a hydraulic excavator and an excavator.

  (2) In the above embodiment, the weight main body 60 constituting the front weight 53 and the rear weight 54 has been described as including the lower weight 61 and the upper weight 62, but the present invention is not limited thereto. Is not to be done. The weight main body 60 may be composed of a single heavy object, or may be an aspect in which three or more heavy objects are connected to each other.

  (3) In the above embodiment, the description has been made in the aspect in which two scaffold members 63 (64) are attached to the front weight 53 and the rear weight 54, respectively, but the present invention is limited to this. It is not something. For example, when the left side portion of the rear weight 54 is disposed at a position close to the left side frame 511, the scaffold member 63 (64) may be attached only to the right side of the rear weight.

10 Crane (construction machine)
11 Upper turning body 12 Lower traveling body 50 Track frame 501 Front surface portion 502 Rear surface portion 503 Upper frame connecting portion (frame side connecting portion)
504 Lower frame connecting part (frame side connecting part)
504S Through hole (first through hole)
511 Left side frame (side frame)
521 Right side frame (side frame)
53 Front weight (runner weight)
54 Rear weight (running body weight)
56 Connecting part 57 Ladder 60 Weight main body 60L Weight right side (weight side)
60R weight left side (weight side)
60T Weight upper surface portion 61 Lower weight 610 Opposing surface 611 Upper weight connecting portion (weight side connecting portion)
613 Lower weight connection part (weight side connection part)
613S Through hole (second through hole)
614 Lower weight connection plate 615 Storage portion 61R Lower weight right side surface 61L Lower weight left side surface 62 Upper weight 623 Upper weight connection plate 63, 64 Scaffolding member AW Connection path P1, P2 Connection pin

Claims (10)

A construction machine comprising a lower traveling body movable on the ground, and an upper revolving body supported so as to be able to swivel on the lower traveling body,
The lower traveling body is
A track frame that includes a front surface portion and a rear surface portion, and supports the upper revolving structure;
A pair of left and right side frames that respectively support a pair of side frames that are capable of orbiting movement, and that are connected to both ends in the left and right direction of the track frame so as to extend in the front-rear direction than the track frame; ,
Between the pair of left and right side frames, a pair of front and rear traveling body weights respectively disposed on the front side and the rear side of the track frame;
A pair of front and rear scaffolding members respectively attached to the pair of traveling body weights;
With
Each of the pair of front and rear traveling body weights includes a weight upper surface portion and a pair of weight side surfaces respectively disposed facing the pair of side frames,
The scaffold member includes a scaffold upper surface portion that can be arranged to face upward, and
The scaffold upper surface portion faces upward, the scaffold member extends so as to protrude from the weight side surface toward the side frame, and the scaffold upper surface portion and the weight upper surface portion are arranged so as to be connected to each other along the left-right direction A protruding posture that forms a movement passage that allows the operator to move between the pair of side frames together with the weight upper surface portion; and
An accommodation posture in which the scaffold member is arranged to be separated from the side frame inward in the left-right direction with respect to the protruding posture, and the scaffold member is arranged so as to overlap the weight upper surface portion or the weight side surface. Posture,
A construction machine that can change its position.   The construction machine according to claim 1, wherein the pair of front and rear traveling body weights are respectively connected to the front surface portion and the rear surface portion of the track frame between the pair of left and right side frames. The scaffold member includes a scaffold back surface portion facing downward in the protruding posture,
The construction machine according to claim 1, wherein the scaffold back surface portion is disposed so as to overlap the weight side surface in the accommodated posture.   The construction machine according to claim 1, wherein the scaffold upper surface portion is disposed so as to overlap the weight upper surface portion in the accommodation posture. The traveling body weight includes a support member that includes a fulcrum and supports the scaffold member;
The construction machine according to any one of claims 1 to 4, wherein the scaffold member changes its posture between the protruding posture and the housing posture by rotating about the fulcrum portion as a fulcrum. The traveling body weight is:
A lower weight having a lower upper surface portion facing upward;
An upper weight having an upper upper surface portion facing upward and mounted on the lower upper surface portion of the lower weight, wherein both left and right end portions of the upper weight are flush with both left and right end portions of the lower weight. Or an upper weight disposed on the inner side in the left-right direction than both ends of the lower weight in the left-right direction;
With
The construction machine according to any one of claims 1 to 5, wherein when the scaffold member is in the projecting posture, the upper upper surface portion and the scaffold upper surface portion of the upper weight form the movement passage. The track frame is disposed on each of the front surface portion and the rear surface portion, and includes a frame side connection portion connected to the traveling body weight,
The traveling body weight includes a weight side coupling portion coupled to the frame side coupling portion,
The weight side surface is arranged with a space in the left-right direction with respect to the side frame, and an operator accesses the frame side connecting portion and the weight side connecting portion from the front or rear of the traveling body weight. The construction machine according to claim 2, wherein an allowable connecting passage is formed along the front-rear direction below the scaffold member and between the weight side surface and the side frame. A first through hole is opened along the left-right direction in the frame side connecting portion,
A second through hole is opened along the left-right direction in the weight side connecting portion,
The construction machine according to claim 7, wherein the lower traveling body further includes a connecting pin that is inserted through the first through hole and the second through hole and connects the traveling body weight and the track frame to each other.   The construction machine according to claim 8, wherein the traveling body weight includes a storage portion that can store the connection pin. 10. The construction according to claim 9, wherein the storage portion is disposed on at least one of the pair of weight side surfaces and the side surface of the traveling body weight opposite to the track frame in the front-rear direction. machine.

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