JP2018122978A - 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.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. Scaffolding upper surface parts of the scaffolding members 63 and upper surface parts of the front weight 53 and the rear weight 54 are disposed so as to continue into each other along a lateral direction and form a movement passage TR which allows a worker to move between the pair of left and right side frames.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. The operator can move from the upper surface of the lower weight to the upper surface of the upper weight after moving from the ground to the upper surface of the lower weight. A movement passage is formed between the pair of side frames through the upper surface of the lower weight.

JP 2006-219241 A

  In the technique described in Patent Document 1, since there is a step between the pair of upper weights and the lower weight, when the operator moves between the pair of side frames, the worker moves while paying attention to the steps. There was a need.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a construction machine in which an operator can easily move between a pair of side frames through a running body weight attached to a track frame. And

  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 A body weight and at least a pair of front and rear scaffolding members, each having a body weight and an upper surface portion of the scaffold facing upward; The pair of front and rear traveling body weights each include a weight upper surface portion facing upward, and a pair of left and right weight side surfaces respectively opposed to the pair of side frames, and the scaffold member is The scaffold member is attached to the traveling body weight such that the scaffold upper surface portion and the weight upper surface portion are connected to each other along the left-right direction while projecting to the side frame side from the weight side surface, and the scaffold upper surface portion and the scaffold The weight upper surface portion forms a movement passage that allows the operator to move between the pair of left and right side frames.

  According to this configuration, the moving passage is formed between the pair of side frames by the traveling body weight and the scaffold member. And since it arrange | positions so that the weight upper surface part of a traveling body weight and the scaffold upper surface part of a scaffold member may continue along a left-right direction, a movement of an operator is implement | achieved safely and easily.

  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.

  Said structure WHEREIN: The said track frame is each arrange | positioned at the said front-surface part and the said rear surface part, It is equipped with the frame side connection part connected with the said traveling body weight, The said front-and-rear traveling body weight is respectively the said frame. A weight side connection portion connected to a side connection portion, the weight side surface of the traveling body weight is disposed at a distance in the left-right direction with respect to the side frame, and the at least a pair of front and rear scaffolding members include: Each includes a scaffold lower surface portion facing downward, and the scaffold lower surface portion of the scaffold member and the weight side surface of the traveling body weight pass under the scaffold member from the front or rear of the traveling body weight. A connecting passage that allows access to the frame side connecting portion and the weight side connecting portion along the front-rear direction It is desirable that a constant.

  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 track frame is disposed so as to protrude from the front side surface and the rear side surface at a position sandwiching the frame side connecting portion from both sides in the left-right direction, and can support the lower traveling body. Further comprising two pairs of jack-up devices, the traveling body weight is disposed at a position sandwiched from both sides in the left-right direction by the pair of jack-up devices disposed on the front side surface or the rear side surface, The weight side surface of the traveling body weight is disposed with a space in the left-right direction between the weight body and the jackup device, and the connecting passage is below the scaffold member, and the weight side surface and the jackup device. It is desirable to form along the front-back direction between.

  According to this configuration, the lower traveling body can be supported by the two pairs of front and rear jackup devices. Further, since the connecting passage is formed between the jackup device and the traveling body weight, the operator can easily access the frame side connecting portion and the weight side connecting portion through the connecting passage.

  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.

  In the above configuration, the traveling body weight includes a lower weight having an upper surface portion, and an upper weight having an upper surface portion and detachable from the upper surface portion of the lower weight, the right and left sides of the upper weight being Upper end weights, both ends of which are arranged flush with both left and right end portions of the lower weight or on the inner side in the left and right direction with respect to the left and right end portions of the lower weight. It is desirable that the upper surface portion of the weight and the scaffold upper surface portion of the scaffold member form the moving passage.

  According to this configuration, the traveling body weight is separated into two upper and lower weights, thereby improving the transportability of the traveling body weight.

  In the above configuration, it is desirable that the scaffold member be detachable from the traveling body weight.

  According to this configuration, the traveling body weight and the scaffold member can be transported in a state where the scaffold member is separated from the traveling body weight.

  In the above configuration, the lower traveling body can be attached to the traveling body weight or the scaffold member, and a ladder that enables the worker to move between the ground and the weight upper surface portion or the scaffold upper surface portion. It is desirable to have more.

  According to this configuration, the operator can move directly from the ground onto the traveling body weight or the scaffold member. In other words, the weight upper surface portion of the traveling body weight from the ground and the other weight structure in which the worker moves from the ground to a part of the traveling body weight and then moves to the upper surface portion of the traveling body weight. Accessibility to the pair of side frames is improved.

  In the above configuration, the pair of front and rear traveling body weights includes a front traveling body weight attached to the front side surface and a rear traveling body weight attached to the rear side surface, and the at least one pair of front and rear scaffolds The member is attached to at least one end portion of the front traveling body weight in the left-right direction, and to the end portion of the rear traveling body weight on the same side as the front scaffold member in at least the left-right direction. A rear scaffold member, and the lower traveling body is supported by at least one of the track frame and the side frame, and can be moved between the front scaffold member and the rear scaffold member by an operator. It is desirable to further have a frame-side scaffold part.

  According to this configuration, the operator can move between the movement paths before and after the track frame through the frame-side scaffold.

  ADVANTAGE OF THE INVENTION According to this invention, the construction machine which an operator can move easily between a pair of side frames is provided through the traveling body weight with which a track frame is mounted | worn.

1 is a side view of a construction machine according to an embodiment of the present invention. It is a top view of the lower traveling body of the construction machine concerning one embodiment of the present invention. It is a rear view of the lower traveling body of the construction machine concerning one embodiment of the present invention. FIG. 4 is a side sectional view of the lower traveling body of the construction machine according to the embodiment of the present invention, and is a sectional view taken along the line BB in FIG. 3. It is the front view which looked at the running body weight and scaffolding member concerning one embodiment of the present invention from the track frame side. FIG. 6 is an enlarged plan view of the traveling body weight of FIG. It is a side view which shows the connection part where the traveling body weight and track frame which concern on one Embodiment of this invention are mutually connected. FIG. 4 is a side cross-sectional view showing a traveling body weight and a scaffold member according to an embodiment of the present invention, and is a cross-sectional view taken along line AA in FIG. 3. It is sectional drawing which shows the traveling body weight and scaffold member which concern on one Embodiment of this invention, Comprising: It is sectional drawing of CC position of FIG. FIG. 4 is an enlarged plan view of a connecting portion where the upper weight and the lower weight of the traveling body weight according to the embodiment of the present invention are connected to each other. FIG. 9 is a side cross-sectional view showing a running body weight and a scaffold member according to an embodiment of the present invention, and is a cross-sectional view taken along the line DD in FIG. 8. It is a perspective view of the lower traveling body of the construction machine concerning the modification embodiment of the present invention.

  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.

<About the lower traveling body>
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. 4 is a side cross-sectional view of the lower traveling body 12, and is a cross-sectional view taken along the line BB in FIG. In FIG. 4, the ground G is illustrated.

  The lower traveling body 12 includes a track frame 50 (also referred to as a car body), a left crawler unit 51, a right crawler unit 52, a front weight 53 (traveling body weight), a rear weight 54 (traveling body weight), A plurality of connecting portions 56, two pairs of front and rear scaffold members 63, and a pair of ladders 57 are provided.

  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. 5). 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.

  Two pairs of front and rear scaffold members 63 are attached to the front weight 53 and the rear weight 54, respectively.

  The track frame 50 further includes two pairs of front and rear jack-up devices 55 provided on the front surface portion 501 and the rear surface portion 502, respectively.

  The two pairs of jack-up devices 55 have a function of supporting the lower traveling body 12. As shown in FIG. 2, these jack-up devices 55 are arranged so as to protrude forward and backward from both end portions of the front portion 501 and the rear portion 502. Note that the two pairs of jack-up devices 55 on the front side and the rear side of the track frame 50 are respectively disposed at positions sandwiching an upper frame connecting portion 503 and a lower frame connecting portion 504 described later from both sides in the left-right direction. The jackup device 55 includes a jackup cylinder 55S and a jackup support member 55T for supporting the jackup cylinder 55S (see FIG. 3). The jack-up cylinder 55S can be expanded and contracted along the vertical direction by hydraulic pressure. The extension operation of the plurality of jackup devices 55 allows the jackup device 55 to support the lower traveling body 12 in such a posture that the left crawler unit 51 and the right crawler unit 52 are lifted from the ground (FIG. 3). The front weight 53 and the rear weight 54 described above are disposed at positions sandwiched from both sides in the left-right direction by a pair of jackup devices 55.

<About running body weight>
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 front view of the rear weight 54 (running body weight) and the scaffold member 63 according to the present embodiment as viewed from the track frame 50 side. FIG. 6 is an enlarged plan view of the rear weight 54 of FIG. FIG. 7 is a side view showing a connecting portion 56 where the rear weight 54 and the track frame 50 are connected to each other. FIG. 8 is a side sectional view showing the rear weight 54 and the scaffold member 63, and is a sectional view taken along the line AA in FIG. FIG. 9 is a cross-sectional view showing the rear weight 54 and the scaffold member 63, and is a cross-sectional view taken along the line CC in FIG. FIG. 10 is an enlarged plan view of a connecting portion where an upper weight 62 and a lower weight 61, which will be described later, are connected to each other. FIG. 11 is a side sectional view showing the rear weight 54 and the scaffold member 63 and is a sectional view taken along the line DD in FIG.

  The rear weight 54 includes a weight body 60 (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) (FIGS. 3 and 5). The weight upper surface portion 60T is an upper surface portion of the weight main body 60. The right side surface 60L and the left side surface 60R are the right and left side surfaces of the weight body 60, respectively, and are disposed to face the pair of left and right side frames 511 and 521, 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. 5) (upper surface portion) facing upward, a pair of side surfaces (lower weight left side surface 61L and lower weight right side surface 61R: FIG. 5), and an opposing surface 610 (FIG. 5). 7). 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. 7).

  The upper weight 62 (FIGS. 3 and 5) is a plate-like heavy object that is detachably attached to the lower weight upper surface portion 61 </ b> T of the lower weight 61 and constitutes the upper end side of the weight body 60. The upper weight 62 includes an upper weight upper surface portion 62T (upper surface portion) (FIG. 5) facing upward. As shown in FIGS. 2 and 7, the rear end side of the upper weight 62 is disposed so as to protrude rearward from the lower weight 61. The left and right end portions (side surfaces) of the upper weight 62 are arranged flush with the left and right end portions (lower weight left side surface 61L, lower weight right side surface 61R) of the lower weight 61 along the vertical direction. Yes. 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. 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.

<About connection of traveling body weight and track frame>
The lower weight 61 further includes a pair of left and right upper weight coupling portions 611 (weight side coupling portions) (FIG. 5), a pair of left and right lower weight coupling portions 613 (weight side coupling portions) (FIG. 5), and a pair of left and right weights. Storage section 615 (FIG. 3). 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 (FIG. 7). 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 (FIGS. 5 and 7) arranged 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 (FIG. 7). 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. 7) 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 left and right ends of the rear surface portion of the lower weight 61. 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. 5 to 7) 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 track frame 50 includes a pair of left and right upper frame connecting portions 503 (frame side connecting portions) (FIG. 7) and a pair of left and right lower frame connecting portions 504 (frame side connecting portions) (see FIG. 7). FIG. 5 is a view of the rear weight 54 and the pair of scaffold members 63 as viewed from the track frame 50 side. The pair of left and right upper frame connecting portions 503 and lower frame connecting portions provided in the track frame 50 are shown. 504 also appears.

  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. Further, as shown in FIG. 7, 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. 7). The lower frame connecting portion 504 is connected to the lower weight connecting portion 613 of the lower weight 61 by the connecting pin P1 (FIGS. 6 and 7). Further, the front portion 501 of the track frame 50 is also provided with a connecting portion 56 similar to the rear portion 502 side (FIG. 2).

<Connection between lower weight and upper weight>
With reference to FIGS. 8 to 10, 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 are arranged 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. The lower weight connection plate 614 has a substantially triangular shape in the rear view of FIG. Although not shown in FIG. 9, a plurality of lower weight connection plates 614 are provided in the front-rear direction on each of the lower weight left side surface 61L and the lower weight right side surface 61R as shown on the lower weight right side surface 61R side in FIG. Are arranged at intervals. The lower weight connection plate 614 is used to connect the lower weight 61 and the upper weight 62. A through-hole 614S (FIG. 10) is opened in the lower weight connecting plate 614 along the front-rear direction.

  The plurality of upper weight connection plates 623 are arranged so as to extend downward from the side surface portion of the upper weight 62 (see the upper weight right side surface 62R in FIG. 10). Specifically, the base end portion of the upper weight connection plate 623 extends from the side surface of the upper weight 62 along the left-right direction, and the distal end side of the upper weight connection plate 623 extends downward. As a result, as shown in FIG. 9, the lower weight connection plate 614 and the upper weight connection plate 623 are arranged so that the tip portions thereof overlap each other in the rear view. As shown in FIG. 8, 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. Further, as shown in FIGS. 8 and 10, two upper weight connection plates 623 are disposed 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 623S (FIG. 10) is opened in the upper weight connection plate 623 along the front-rear direction.

  The connection weight P2 (FIGS. 8 to 10) is sequentially inserted into the through hole 614S of the lower weight connection plate 614 of the lower weight 61 and the through hole 623S of the upper weight connection plate 623 of the upper weight 62, whereby the 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. 5, since the left and right upper weight connection plates 623 are disposed at positions where the lower weight 61 is sandwiched, the upper weight 62 can be easily disposed at the mounting position with respect to the lower weight 61. it can. Thus, in the present embodiment, the lower weight 61 and the upper weight 62 can be easily connected and separated.

  Further, as shown in FIG. 10, a connection notch 63T having a shape in which a part of the scaffold member 63 is partially cut out so as to surround the lower weight connection plate 614 and the upper weight connection plate 623 is provided as a scaffold. The member 63 is formed (FIG. 2). For this reason, interference with the connection part of the lower weight 61 and the upper weight 62 and the scaffold member 63 is prevented.

<About scaffold members>
The pair of scaffold members 63 attached to the rear weight 54 is supported on the weight right side surface 60L and the weight left side surface 60R of the weight body 60, respectively (FIG. 5). Specifically, the pair of scaffold members 63 are supported on the side surfaces of both end portions in the left-right direction of the upper weight 62 of the weight body 60. The scaffold member 63 is mainly composed of a metal plate material. Referring to FIG. 9, each of the pair of scaffold members 63 includes a scaffold upper surface portion 63P facing upward and a scaffold lower surface portion 63Q facing downward. The scaffold lower surface portion 63Q corresponds to the back surface portion of the scaffold member 63. The vertical height of the scaffold member 63 is smaller than the vertical height of the weight body 63. More specifically, the vertical height of the scaffold member 63 is smaller than the vertical height of the lower weight 61 and is substantially the same as the vertical height of the upper weight 62.

  A plurality of holes are opened in the scaffold member 63 so as to communicate the scaffold upper surface portion 63P and the scaffold lower surface portion 63Q (FIG. 2). The hole portion allows the weight of the scaffold member 63 to be reduced, and mud or the like adhering to the worker's shoes falls from the hole portion of the scaffold member 63, so that the worker moves on the scaffold member 63. Slip is suppressed. As an example, in this embodiment, the weight of one scaffold member 63 is 100 kg, and the scaffold member 63 is made of a lightweight metal member as compared with the above-described upper weight 62.

  Furthermore, the scaffold member 63 includes a plurality of ribs 63L (FIGS. 8, 9, and 11) and a plurality of angles 63G (FIGS. 9 and 11). The plurality of ribs 63L are arranged at intervals in the front-rear direction on the scaffold lower surface portion 63Q. The rib 63L extends along the left-right direction, and has a tapered shape toward the outer side in the left-right direction, as shown in FIGS. The plurality of angles 63G are arranged at intervals in the left-right direction on the scaffold lower surface portion 63Q. Each of the plurality of angles 63G has an L shape, and extends along the front-rear direction so as to connect adjacent ribs 63L. The plurality of ribs 63L and the plurality of angles 63G maintain the rigidity and strength of the scaffold member 63 high.

  Referring to FIG. 11, a bolt hole (not shown) is opened at an angle 63 </ b> G arranged at the uppermost weight 62 side portion of the scaffold member 63. As shown in FIGS. 8 and 11, the scaffold member 63 and the upper weight 62 are connected by a plurality of pairs of fastening bolts TW so as to sandwich the ribs 63 </ b> L from the front and rear.

  Furthermore, referring to FIG. 11, a bolt mounting portion 63 </ b> M is disposed in a region facing the lower weight 61 in the lower end portion of each rib 64 </ b> L. A female hole (not shown) is formed in the bolt mounting portion 63M. As shown in FIG. 11, the positioning bolt TV is mounted in the female hole portion of the bolt mounting portion 63M 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 (FIGS. 8 and 11). The scaffold member 63 is positioned by the screw head of the positioning bolt TV coming into contact with the receiving portion 61M.

  The pair of ladders 57 (FIG. 2) can be attached to the left and right scaffold members 63, respectively, and allows the operator to move between the ground and the scaffold upper surface portion 63P of the scaffold member 63.

  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 the auxiliary crane (not shown) via the three hooks 62F (FIG. 7) is placed on the lower weight 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 the plurality of connecting pins P2 as described above, whereby the rear weight 54 is assembled. Further, as described above, the pair of scaffold members 63 is fixed to the upper weight 62 by the plurality of fastening bolts TW (FIG. 11). As a result, the pair of scaffold members 63 are disposed so as to protrude outward in the left-right direction from the weight body left side surface 60L and the weight body right side surface 60R of the weight body 60.

  Thereafter, the rear weight 54 is lifted by the auxiliary crane via the three hooks 62F (FIG. 7) and moved so as to approach the rear surface portion 502 of the track frame 50. As described above, in this embodiment, after the lower weight 61 and the upper weight 62 are connected, the upper weight 62 is lifted, so that the lower weight 61 heavier than the upper weight 62 can be lifted integrally.

  After the rear weight 54 is lifted, the shaft portion 612 (FIG. 7) of the lower weight 61 is eventually 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 pair of left and right connecting pins P1.

  When the rear weight 54 is connected to the track frame 50, the pair of scaffold members 63 are located on the left side frame 511 side and the right side frame 521 side relative to the weight main body left side surface 60 </ b> L and the weight main body right side surface 60 </ b> R. It is arranged to protrude. Further, the scaffold upper surface portion 63P of the scaffold member 63 and the weight main body upper surface portion 60T (upper weight upper surface portion 62T) of the weight main body 60 are arranged so as to be connected to each other along the left-right direction. In other words, 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 at a predetermined interval. As a result, a movement path TR (FIG. 2) is formed that allows the operator of the crane 10 to move between the pair of side frames through the upper weight 62 and the pair of scaffold members 63. For this reason, a worker's movement is implement | achieved safely and easily. Furthermore, in the present embodiment, the scaffold member 63 that is lighter than the upper weight 62 is attached to the weight main body 60, so that the movement path TR is formed in the lower traveling body 12. For this reason, the upper weight 62 is made wider than the lower weight 61, and the size and weight of the upper weight 62 are set smaller than the other structure in which the upper weight 62 takes the place of the pair of scaffold members 63. . For this reason, the rear side weight 54 can be assembled easily.

  The same effect can be obtained with the front weight 53. Further, the scaffold upper surface portion 63P of the scaffold member 63 and the weight body upper surface portion 60T (upper weight upper surface portion 62T) of the weight body 60 do not need to be arranged to be continuous with each other in all the regions in the front-rear direction. A part of the scaffold upper surface part 63P and a part of the weight main body 60P may form a movement path TR through which an operator can pass. In this case, it is more desirable that a step larger than the size of the operator's foot does not exist in the movement path TR.

  2 and 3, in this embodiment, the operator can easily access the connecting portion 56 (FIG. 2) from the rear side of the rear weight 54 through the lower side of the scaffold member 63. A connecting passage AW is formed as possible. 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. More specifically, the connecting passage AW is formed below the scaffold member 63 and between the right side surface 60L and the left side surface 60R and the pair of jack-up devices 55 along the front-rear direction. Note that the scaffold lower surface portion 63Q, the weight right side surface 60L, and the weight left side surface 60R of the scaffold member 63 define a connecting passage AW along the front-rear direction.

  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 5, the weight body 60 and the pair of scaffolds are provided so that the rear weight 54 and the pair of scaffold members 63 have a T-shape that forms the connection passage AW. The width of the member 63 in the left-right direction 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 into the through hole 504S and the through hole 613S (FIG. 7). 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 directly 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 by mounting the connection P1 pin. Further, the pair of jack-up devices 55 does not prevent the worker from passing through the connecting passage AW.

  Further, in the present embodiment, as shown in FIG. 2, a jack notch portion 63 </ b> S having a shape in which the scaffold member 63 is partially cut away so as to face the jackup device 55 is provided. For this reason, it is suppressed that the scaffold member 63 interferes with the jackup apparatus 55, and the operativity of the jackup apparatus 55 by an operator improves.

  Furthermore, in the present embodiment, a pair of storage portions 615 are provided at both left and right end portions of the rear surface portion of the lower weight 61 (the side surface of the lower weight 61 on the front side in FIG. 3). For this reason, the operator can take out the connecting pin P1 from the storage portion 615 and promptly enter the connecting passage AW. The storage portion 615 may be provided on the lower weight left side surface 61L and the lower weight right side surface 61R of the lower weight 61. Also in this case, the operator can take out the connection pin P1 from the storage portion 615 while entering the connection passage AW, and can quickly reach the connection portion 56 through the connection passage AW. Further, the storage portion 615 may be disposed in other regions of the weight main body 60 and the pair of scaffold members 63.

  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, the weight main body 60 can be separated into a lower weight 61 and an upper weight 62. For this reason, the transportability of the front weight 53 and the rear weight 54 is improved. Further, the pair of scaffold members 63 is detachable from the weight body 60 (upper weight 62). As a result, in this embodiment, the scaffold member 63 and the weight body 60 can be transported in a plurality of forms as follows. (I) a form in which the lower weight 61, the upper weight 62, and the pair of scaffold members 63 are all connected, (ii) a form in which the lower weight 61 and the upper weight 62 are connected, and the pair of scaffold members 63 are removed, (iii) ) A form in which the pair of scaffold members 63 and the upper weight 62 are connected to each other and the lower weight 61 and the upper weight 62 are separated. (Iv) The lower weight 61, the upper weight 62, and the pair of scaffold members 63 are all separated. Form.

  In the present embodiment, as shown in FIGS. 2 and 3, a ladder 57 can be attached to and detached from the pair of scaffold members 63. For this reason, the worker can move directly from the ground onto the scaffold member 63 and the rear weight 54 (front weight 53). In other words, the upper surface of the weight body of the rear weight 54 from the ground is compared with other weight structures that move from the ground to a part of the rear weight 54 and then move to the upper surface of the rear weight 54. Access to the portion 60T and the pair of side frames 511 and 521 is improved.

  The construction machine (crane 10) according to the 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-described embodiment, the pair of scaffold members 63 are mounted on the front weight 53 and the rear weight 54, respectively, but the present invention is not limited to this. 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 54. That is, a mode in which at least a pair of front and rear scaffold members 63 are provided on the front weight 53 and the rear weight 54 may be employed.

  (4) In the above embodiment, the ladder 57 is mounted on the scaffold member 63. However, the present invention is not limited to this. The ladder 57 may be attached to the front weight 53 and the rear weight 54. In this case, the ladder 57 allows the operator to move between the upper surface portions of the front weight 53 and the rear weight 54 and the ground.

  (5) In the above-described embodiment, the pair of front and rear movement passages TR are formed between the pair of side frames. However, the present invention is not limited to this. A mode in which the movement path TR is formed in either one of the front and rear sides of the track frame 50 may be employed. Furthermore, FIG. 12 is a perspective view of the lower traveling body 12A of the construction machine according to a modified embodiment of the present invention. In this modified embodiment, compared with the previous embodiment, the lower traveling body 12A is different in that it includes a track frame scaffolding section 70. Therefore, the difference will be described, and description of other common points will be omitted. To do. In addition, in FIG. 12, about the member provided with the same structure and function as the member which concerns on previous embodiment, the same code | symbol as FIGS. 1-11 is attached | subjected. In FIG. 12, the structure of the lower traveling body 12A excluding the track frame scaffolding portion 70 can be referred to as the structure of the lower traveling body 12 of the previous embodiment.

  The lower traveling body 12A includes a pair of left and right track frame scaffold portions 70 (frame side scaffold portions). The pair of track frame scaffold portions 70 are scaffold members fixed to the left and right side portions of the track frame 50. The track frame scaffold 70 may be supported by the left side frame 511 and the right side frame 521, or a part of the track frame scaffold 70 may be supported by the track frame 50 and the side frames 511 and 521, respectively. . The track frame scaffold unit 70 includes a front scaffold unit 71, a central scaffold unit 72, and a rear scaffold unit 73. The front scaffold portion 71 is disposed adjacent to the front scaffold member 63 and is disposed above the jack-up device 55 (FIG. 2). The central scaffold portion 72 is disposed on the outer side in the left-right direction of the revolving body shaft support portion 500 so as to connect the front scaffold portion 71 and the rear scaffold portion 73. The rear scaffold portion 73 is disposed adjacent to the rear scaffold member 63 and is disposed above the jackup device 55 (FIG. 2). As shown in FIG. 12, the track frame scaffolding 70 is disposed at a slightly higher position than the two pairs of front and rear scaffolding members 63. As a result, it is possible to prevent the track frame scaffolding portion 70 from interfering with the expansion / contraction operation of the jackup device 55.

  In the case of the form shown in FIG. 12, the operator can move along the front-rear direction between the movement paths TR (FIG. 2) before and after the track frame 50 through the track frame scaffold 70. Therefore, the operator can move along the front-rear direction without getting on the left crawler shoe 514 and the right crawler shoe 524 (FIG. 2). In addition, the track frame scaffold part 70 may be arrange | positioned only at the one end side of the left-right direction. In this case, the track frame scaffold part 70 may be disposed so as to connect the front scaffold member 63 (front scaffold member) and the rear scaffold member 63 (rear scaffold member) of the track frame 50.

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 61T Lower weight upper surface portion 62 Upper weight 623 Upper weight connection plate 63 Scaffolding member AW Connection passages P1, P2 Connection pin TR Movement passage

Claims (11)

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; ,
A weight upper surface facing upward and a pair of left and right weight side surfaces arranged to face the pair of left and right side frames, respectively, and the front side and the rear side of the track frame between the pair of left and right side frames. A pair of front and rear traveling body weights, respectively,
A pair of front and rear scaffolding members each provided with an upper surface portion of the scaffold facing upward, and mounted on the pair of front and rear traveling body weights so as to protrude from the weight side surface toward the side frame;
Have
The construction machine, wherein the scaffold upper surface part and the weight upper surface part are arranged so as to be continuous with each other along the left-right direction, and form a movement passage that allows a worker to move between the pair of left and right side frames.   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 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,
Each of the pair of front and rear traveling body weights includes a weight side coupling portion coupled to the frame side coupling portion,
The weight side surface of the traveling body weight is arranged with a space in the left-right direction with respect to the side frame,
The at least a pair of front and rear scaffold members each include a scaffold lower surface portion facing downward,
The scaffold lower surface portion of the scaffold member and the weight side surface of the traveling body weight pass through the lower side of the scaffold member from the front or rear of the traveling body weight by an operator, and the frame side coupling portion and the weight side coupling portion. The construction machine according to claim 2, wherein a connecting passage that allows access to the vehicle is defined along a front-rear direction. The track frame is disposed so as to protrude from the front side surface and the rear side surface at a position sandwiching the frame side connecting portion from both sides in the left-right direction, and two pairs of front and rear jacks that can support the lower traveling body Further comprising a device,
The traveling body weight is arranged at a position sandwiched from both sides in the left-right direction by a pair of jack-up devices arranged on the front side surface or the rear side surface,
The weight side surface of the traveling body weight is arranged with a space in the left-right direction between the traveling body weight, and the connecting passage is below the scaffold member, and the weight side surface and the jack up The construction machine according to claim 3, wherein the construction machine is formed along a front-rear direction with respect to the apparatus. 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 3 or 4, 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 5, wherein the traveling body weight includes a storage portion that can store the connection pin.   The construction according to claim 6, 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. The traveling body weight is:
A lower weight with an upper surface,
An upper weight having an upper surface portion and detachable from the upper surface portion of the lower 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 Alternatively, the upper weight is disposed on the inner side in the left-right direction than the both ends in the left-right direction of the lower weight, and
Have
The construction machine according to any one of claims 1 to 7, wherein the upper surface portion of the upper weight and the scaffold upper surface portion of the scaffold member form the moving passage.   The construction machine according to any one of claims 1 to 8, wherein the scaffold member is attachable to and detachable from the traveling body weight.   The lower traveling body further includes a ladder that is attachable to the traveling body weight or the scaffold member and allows an operator to move between the ground and the weight upper surface portion or the scaffold upper surface portion. The construction machine according to any one of 1 to 9. The pair of front and rear traveling body weights are:
A front running body weight attached to the front side;
A rear running body weight attached to the rear side surface;
With
The at least one pair of front and rear scaffold members are:
A front scaffolding member attached to at least one end in the left-right direction of the front traveling body weight;
A rear scaffold member attached to an end of the rear running body weight on the same side as the front scaffold member at least in the left-right direction;
With
The lower traveling body further includes a frame-side scaffold portion that is supported by at least one of the track frame and the side frame and allows an operator to move between the front-side scaffold member and the rear-side scaffold member. The construction machine according to any one of claims 1 to 10.

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