JP6683595B2 - Crawler work vehicle - Google Patents

Description

  The present invention relates to a crawler type work vehicle including a jack-up device.

  In general, a crawler-type work vehicle such as a crawler crane is equipped with a trailer that reduces the transport weight or the transport width of the traveling body by removing a pair of traveling devices of the traveling body from the car body of the main body. For example, a jack-up device mounted on a traveling body is used for mounting or dismounting the traveling device during such transportation.

  As one of the prior art of a crawler type work vehicle equipped with this type of jack-up device, a downward jack cylinder is attached to one end of a jack beam extending in a substantially horizontal direction, and an axle is attached to the other end of the jack beam. Axle mounting parts for individual jack units are attached to and detached from the axles that are provided to displace the crawlers to the left and right positions of the front and rear ends of the running body by forming a jack unit with mounting parts. BACKGROUND ART A crawler type construction machine having a configuration in which it is freely attached is known (for example, refer to Patent Document 1).

JP, 2009-40110, A

  The crawler-type construction machine of the related art disclosed in Patent Document 1 described above has a link mounting bracket on one side of the jack beam when the axle mounting portion having the axle insertion hole of the jack-up device is mounted on the outer periphery of the axle. By connecting a link mounting bracket provided on the car body side of the traveling body with a bolt or the like via a jack unit positioning link, the jack-up device is attached to the car body and the axle.

  By the way, in order to reduce the weight while ensuring the strength of the jack-up device, it is necessary to increase the vertical dimension of the jack beam body, but since this jack beam is arranged between the ground and the swing structure, In a small vehicle in which the position of the lower surface of the revolving structure is kept low, the vertical dimension of the jack beam main body is restricted as compared with a large vehicle. Moreover, in the configuration of the conventional crawler type construction machine, a space for inserting and removing bolts and the like for connecting the link mounting brackets must be taken, and it is difficult to set a large vertical dimension of the jack beam main body.

  Therefore, although the conventional crawler type construction machine can secure the strength of the jackup device by reducing the vertical dimension of the jack beam and using a member having a large plate thickness for the jack beam, on the other hand, the jack beam Since the weight of the main body increases as the plate thickness increases, it is a problem that the weight of the jack-up device cannot be successfully achieved.

  The present invention has been made in view of the circumstances of the prior art as described above, and an object thereof is to provide a crawler work vehicle capable of realizing weight reduction while improving the strength of the jackup device.

In order to achieve the above object, a crawler type work vehicle of the present invention includes a traveling body, a revolving body rotatably mounted on the traveling body, and a work device mounted on the revolving body, The traveling body includes a car body that supports the revolving structure, a plurality of axles that are respectively provided at left and right positions on the front and rear ends of the car body, and extend so as to project from the car body in the left-right direction, and the tips of these axles. A crawler-type work vehicle having a pair of traveling devices disposed on the side and including a side frame and a crawler belt, and a plurality of jack-up devices that are respectively disposed in front of and behind the car body and that elevate and lower the traveling body. Te, each of said plurality of jack-up device, and a jack frame attached to the front end or rear end of the car body, said jack frame Proximal end is attached to a jack beam extending horizontally from the jack frame, it is attach to the tip of the jack beam, the jack cylinder for stretching the lead straight direction, the jack to the jack frame A support shaft that rotatably supports the beam in a horizontal plane, a jack beam side fixing pin that is fixed to a position apart from the support shaft on the upper surface of the jack beam, and a jack that is fixed on the upper surface of the jack frame. A frame-side fixing pin, a jack-beam-side fixing pin, and a jack-frame-side fixing pin that can be inserted and removed from above, and a plate-shaped link member that connects the jack-beam-side fixing pin and the jack-frame-side fixing pin Is characterized by.

  According to the crawler type work vehicle of the present invention, it is possible to realize weight reduction while improving the strength of the jackup device. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

FIG. 1 is an overall view showing a configuration of a crawler crane cited as an embodiment of a crawler type work vehicle according to the present invention. It is a perspective view which shows the structure of the traveling body shown in FIG. It is a figure explaining the basic composition of the jackup device concerning this embodiment, and the figure is a top view of a run. It is a figure explaining the basic composition of the jackup device concerning this embodiment, and the figure is a side view of a running body. It is a figure explaining the basic composition of the jackup device concerning this embodiment, and the figure is a perspective view of a running body. It is a perspective view which decomposes | disassembles and shows the components of the jackup apparatus which concerns on this embodiment. It is a perspective view showing the state where the jack up device concerning this embodiment took the posture at the time of use. It is a top view showing the state where the jack up device concerning this embodiment took the posture at the time of use. It is a perspective view showing the state where the jackup device concerning this embodiment took the posture at the time of the work by the boom, or the run of the vehicle. It is a top view showing the state where the jackup device concerning this embodiment took the posture at the time of work by the boom, or the run of the vehicle. It is a perspective view showing the state where the jackup device concerning this embodiment took the posture at the time of transportation of a vehicle. It is a top view showing the state where the jackup device concerning this embodiment took the posture at the time of transportation of a vehicle. It is a figure which shows the height of the jack beam of the jack-up apparatus which concerns on this embodiment, and the space | interval of the said jack beam and a revolving structure. It is a figure explaining the structure of the jackup apparatus of the prior art mentioned as a comparative example of the jackup apparatus which concerns on this embodiment, and the same figure is a top view of a traveling body. It is a figure explaining the structure of the jackup apparatus of the prior art mentioned as a comparative example of the jackup apparatus which concerns on this embodiment, and the figure is a side view of a traveling body. It is a figure explaining the structure of the jackup apparatus of the prior art mentioned as a comparative example of the jackup apparatus which concerns on this embodiment, and the figure is a perspective view of a traveling body. It is a figure which shows the height of the jack beam of the jack-up apparatus of a prior art, and the space | interval of the said jack beam and a swing body.

  Hereinafter, a mode for carrying out a crawler type work vehicle according to the present invention will be described with reference to the drawings. In the following description, the front-rear, left-right, and up-down directions are the same as the front-rear, left-right, and up-down directions of the vehicle shown in FIG. 1, unless otherwise specified.

  FIG. 1 is a side view showing an appearance of a crawler crane 101 cited as an embodiment of a crawler type working vehicle according to the present invention.

  As shown in FIG. 1, a crawler crane 101 that constitutes a crawler-type work vehicle according to the present embodiment is provided with a traveling body 11 that travels on the ground and a traveling body 11 that is disposed above the traveling body 11 and that has a slewing wheel 12 therebetween. A revolving structure 13 rotatably mounted on the body 11 and a boom 14 as a working device that is disposed forward from the revolving structure 13 and has a base end rotatably supported by the revolving structure 13 are provided. I have it.

  The revolving structure 13 is located in the front part of the vehicle, and has a driver's cab 15 in which an operator rides, and a counterweight 16 located in the rear part of the vehicle and maintaining the weight balance of the vehicle. Further, the revolving unit 13 is equipped with a hoisting drum 17 which is a winch drum for hoisting, and a cylinder 18 for undulating. A hoisting rope 17A is wound around the hoisting drum 17, and the hoisting rope 17A is wound up or unwound by driving the hoisting drum 17, so that the hook 19 provided on the tip side of the boom 14 is vertically moved. Go up and down.

  By expanding and contracting the hoisting cylinder 18, the boom 14 hoists in the vertical direction. The hoisting drum 17 is driven by a hoisting hydraulic motor (not shown) mounted in the revolving unit 13, and the hoisting cylinder 18 is driven by a hydraulic valve (not shown) mounted in the revolving unit 13. Driven. The rotation of the hoisting hydraulic motor can be braked by a brake device (not shown).

  FIG. 2 is a perspective view showing the configuration of the traveling body 11.

  As shown in FIG. 2, the traveling body 11 is provided with a car body 21 that supports the revolving structure 13 via a revolving bearing 21A, and left and right positions at the front and rear ends of the car body 21, respectively. A plurality of axles 22 (in this embodiment, a total of four axles) 22 are provided so as to extend inward. A plurality of jack-up devices (four jack-up devices in this embodiment) 23 for raising and lowering the traveling body 11 are provided on the front and rear portions of the car body 21.

  On the side surface of the car body 21, a crawler expansion / contraction device 25 for expanding or contracting a space between a pair of traveling devices 24 described later is provided. The crawler type traveling device (crawler) 24 described above is attached to the right front and right rear axles 22 and the left front and left rear axles 22.

  Each traveling device 24 is a long side frame 26 arranged perpendicularly to the axle 22, and a traveling drive device which is located at a rear portion of the side frame 26 and constitutes a drive source of drive wheels (sprocket) described later. 27 and a driven wheel 28 that is located in the front portion of the side frame 26 and rotates following the drive wheel. The side frame 26 is provided with fitting portions 26A into which the axle 22 is fitted, one at the front and one at the front, and a total of two locations.

  Each traveling device 24 is arranged in the front-rear direction above the side frame 26, and includes a plurality of upper rollers 29 (see FIG. 1) that roll while supporting a crawler belt 31 described below from below, and a side frame. The lower side of the side frame 26, which is arranged in the front-rear direction of the lower part of 26 and rolls while supporting a crawler belt 31 described below from above, the driving wheels of the traveling drive device 27 and the driven wheels 28. Has an endlessly wound crawler belt 31 on its outer periphery.

  Next, the basic configuration of the jackup device 23 will be described in detail with reference to FIGS. 3 and 4.

  As shown in FIGS. 3A to 3C and FIG. 4, the plurality of jack-up devices 23 are respectively attached to the central portions of the front end and the rear end of the car body 21, and the base end portions are attached to the jack frames 41. The jack beam 42 that extends horizontally from the jack frame 41, the jack cylinder 43 that is vertically attached to the tip of the jack beam 42, and that extends and contracts in the vertical direction by separating from and contacting the jack frame 41. And a cylindrical support shaft 44 that pivotally supports the jack beam 42 in a horizontal plane.

  A support shaft insertion hole 411 having a diameter larger than the outer diameter of the support shaft 44 is formed at both left and right ends of the jack frame 41. The jack beam 42 is arranged in a state of being inclined obliquely downward from the jack frame 41 side to the jack cylinder 43 side, and a plate-shaped upper surface plate 421 forming an upper surface portion of the jack beam 42, and the upper surface plate 421. A plate-shaped lower plate 422 that is arranged horizontally to face each other and forms the lower surface of the jack beam 42, and four plates that stand upright vertically with respect to the upper plate 421 and the lower plate 422 and form side surfaces. And a box-shaped side plate 423.

  A support shaft mounting bracket 424 for mounting the support shaft 44 is integrally fixed to the upper surface plate 421 and the lower surface plate 422 on the jack frame 41 side by welding or the like. A shaft insertion hole 424A having a diameter larger than the outer diameter of the shaft 44 and having the same diameter as the shaft insertion hole 411 of the jack frame 41 is formed at one end.

  Therefore, the pair of support shaft mounting brackets 424 of the jack beam 42 are arranged so that the center line of the support shaft insertion hole 411 of the jack frame 41 and the center line of the support shaft insertion hole 424A of the support shaft mounting bracket 424 are coaxial. By inserting the support shaft 44 into these support shaft insertion holes 411 and 424A while sandwiching the frame 41 from both sides in the vertical direction, the jack beam 42 can be rotated about the support shaft 44 with respect to the jack frame 41. Supported by.

  In addition, a pair of through holes 423A penetrating in the thickness direction of the side surface plate 423 are formed in front portions of the left and right side surface plates 423 at positions vertically separated from each other. The jack cylinder 43 is a hydraulic cylinder for moving up and down the traveling body 11, and this hydraulic cylinder receives a hydraulic pressure and a cylindrical cylinder tube 431 held by the jack beam 42 via a rib 434 described later. A cylinder rod 432 having a base end portion inserted into the cylinder tube 431 so as to extend downward from the tube 431 and a lower end which is a tip end portion of the cylinder rod 432 are mounted on the ground and the traveling body 11 is mounted. And a float 433 that supports the.

  The aforementioned rib 434 extending in the longitudinal direction is attached to the center side of the cylinder tube 431, and the through hole 434A corresponding to each through hole 423A of the side surface plate 423 is bored in the rib 434. There is. Then, with the pair of side plates 423 sandwiching the jack cylinder 43 from both sides in the left-right direction so that the center line of the through hole 434A of the rib 434 and the center line of the through hole 423A of the side plate 423 are coaxial. By inserting the connecting pin 46 into the through holes 423A and 434A, the jack cylinder 43 is connected to the jack beam 42 and integrally rotated in the horizontal direction.

  When the support shaft 44 and the connecting pin 46 are respectively inserted into the support shaft insertion holes 411, 424A and the through holes 423A, 434A, they are prevented from coming off by fastening members such as the stop pins 47, 48 shown in FIG. .

  Here, in order to explain the features of the jack-up device 23 according to the present embodiment in an easy-to-understand manner, first, referring to FIGS. 12 and 13, for the configuration of the conventional jack-up device 23 given as a comparative example of the present embodiment. It will be described in detail with reference. Since the basic configuration of the jack-up device 23 of the related art is the same as the basic configuration of the jack-up device 23 according to the present embodiment described above, the same or corresponding to the present embodiment of the jack-up device 23 of the related art. The same reference numerals are given to the portions to be described, and duplicated description will be omitted.

  As shown in FIGS. 12A to 12C, in the jack-up device 23 of the related art, the jack beam 42 is rotated around the support shaft 44, and the traveling body 11 is moved up and down while the float 433 is placed on the ground. It is possible to move between a use position that takes a time posture and a work / travel position where the float 433 moves away from the ground and the posture of the boom 14 or the vehicle takes a posture during traveling.

  Specifically, a plate-shaped jack beam support bracket 51 serving as a base for fixing the jack beam 42 is interposed between the jack frame 41 and the spindle mounting bracket 424 of the jack beam 42, The jack beam support bracket 51 is fixed to the upper surface of the jack frame 41 by welding or the like.

  In addition, two jack holes 511 and 512 are formed in the peripheral portion of the jack beam support bracket 51 in the thickness direction. Further, one through hole 424B corresponding to each locking hole 511, 512 of the jack beam support bracket 51 is formed on the tip side of the spindle mounting bracket 424 of the jack beam 42 with respect to the spindle insertion hole 424A. ing. Note that in FIGS. 12A to 12C and FIG. 13, the lock pin 52, which will be described later, is inserted into the lock hole 512 inside the jack frame 41 and the through hole 424B of the support shaft mounting bracket 424 of the jack beam 42. Although the application hole 512 and the through hole 424B are not shown, these terms are attached with reference numerals for convenience.

  In the conventional jack-up device 23 having such a configuration, while rotating the jack beam 42 around the support shaft 44, the through hole 424B of the support shaft mounting bracket 424 and the locking hole inside the jack beam support bracket 51 are provided. 512 and the lock pin 52 described above is inserted into the through hole 424B and the locking hole 512, the jack beam 42 is fixed at the use position protruding from the jack frame 41 to the traveling device 24 side obliquely forward. It

  On the other hand, while rotating the jack beam 42 around the support shaft 44, the through hole 424B of the support shaft mounting bracket 424 and the outer locking hole 511 of the jack beam support bracket 51 are aligned with each other, and the lock pin 52 is moved to these positions. When the jack beam 42 is inserted into the through hole 424B and the locking hole 511, the jack beam 42 is fixed at a working / traveling position in which the jack beam 42 projects substantially perpendicularly to the front surface of the jack frame 41.

  As described above, since the jack-up device 23 of the conventional technique is configured to fix the position of the jack beam 42 with respect to the jack frame 41 by the lock pin 52, as shown in FIG. The space d must be taken, and the height h of the jack beam 42 cannot be set large. Therefore, in order to secure the strength of the jack-up device 23 of the related art, it is necessary to set the plate thicknesses of the upper surface plate 421, the lower surface plate 422, and the side surface plate 423 of the jack beam 42 to be large. This results in an increase in weight.

  Therefore, in the jack-up device 23 according to the present embodiment, the position of the jack beam 42 with respect to the jack frame 41 is fixed by using the plate-shaped link member 61 shown in FIGS. Is configured to. Hereinafter, a specific configuration of the jack-up device 23, which is a feature of this embodiment, will be described in detail with reference to FIGS. 3 and 4.

  The jack-up device 23 according to the present embodiment includes a jack beam side fixing pin 62 fixed to a position separated from the support shaft 44 on the upper surface of the jack beam 42, that is, the other end of the support shaft mounting bracket 424, and a jack frame. The jack frame side fixing pin 63 fixed to the upper surface of 41, the jack beam side fixing pin 62 and the jack frame side fixing pin 63 can be inserted and removed from above, and the jack beam side fixing pin 62 and the jack frame side fixing pin 63 can be inserted and removed. And the above-mentioned link member 61 for fixing the position of the jack beam 42 with respect to the jack frame 41.

  The jack frame side fixing pin 63 includes a first fixing pin 631 and a second fixing pin 632 which are fixed to the base surface of the jack beam 42 on the upper surface of the jack frame 41 so as to be adjacent to each other. The diameter of the jack beam side fixing pin 62 and the diameter of one of the first fixing pin 631 and the second fixing pin 632, for example, the first fixing pin 631 are set to be the same. Further, the diameter of the first fixing pin 631 and the diameter of the second fixing pin 632 are set to different sizes. For example, the diameter of the first fixing pin 631 is set larger than the diameter of the second fixing pin 632.

  The link member 61 is, for example, formed in a substantially L-shape including an elongated base piece 61A and a leg piece 61B whose length is set shorter than the base piece 61A and which is bent from one end of the base piece 61A. ing. The width of the base piece 61A and the leg piece 61B is, for example, larger than the diameter of the jack beam side fixing pin 62, the first fixing pin 631, and the second fixing pin 632, and the spindle mounting bracket of the jack beam 42. It is set smaller than the width of 424.

  Further, the link member 61 is disposed at one end of the base piece 61A located on the side opposite to the leg piece 61B, and has a jack beam side pin hole 611 into which the jack beam side fixing pin 62 is inserted and the other end of the base piece 61A. A first pin hole 612 that is arranged and through which the first fixing pin 631 is inserted; and a second pin hole 613 that is arranged adjacent to the first pin hole 612 in the leg piece 61B and through which the second fixing pin 632 is inserted. have.

  The jack beam side pin hole 611, the first pin hole 612, and the second pin hole 613 have hole diameters corresponding to the jack beam side fixing pin 62, the first fixing pin 631, and the second fixing pin 632. The dimensions and the mutual spacing are set. That is, the diameter of the jack beam side pin hole 611 and the diameter of the first pin hole 612 are set to the same size, and the diameter of the first pin hole 612 and the diameter of the second pin hole 613 are set to different sizes. ing.

  Here, in the jack-up device 23 according to the present embodiment, the float 433 is separated from the ground by the use position in which the float 433 is placed on the ground, and the traveling body 11 is lifted and lowered. In addition to the work / travel position where the work or vehicle takes a posture during traveling, it is possible to move the pair of traveling devices 24 to the storage position where the vehicle is detached from each axle 22 and takes a posture during transportation.

  The jack beam side fixing pin 62, the first fixing pin 631, and the second fixing pin 632 are arranged on the support shaft 44 and the jack beam side when the jack beam 42 is rotated around the support shaft 44 and is in the use position. At the intersection of a first circle C1 having a radius of a line segment connecting the fixing pins 62 and a second circle C2 having a radius of a line connecting the first fixing pin 631 and the jack beam side fixing pin 62, the jack beam side fixing pin It is arranged so that 62 is located (refer to FIG. 6).

  Further, the jack beam side fixing pin 62, the first fixing pin 631, and the second fixing pin 632 are provided on the support shaft 44 and the jack shaft 42 when the jack beam 42 rotates around the support shaft 44 and is in the working / traveling position. A jack is provided at one intersection of a first circle C1 having a radius of a line connecting the beam side fixing pins 62 and a third circle C3 having a radius of a line connecting the second fixing pins 632 and the jack beam side fixing pins 62. The beam side fixing pin 62 is arranged so as to be located (see FIG. 8).

  Further, the jack beam side fixing pin 62, the first fixing pin 631, and the second fixing pin 632 are arranged so that when the jack beam 42 is rotated around the support shaft 44 and is in the retracted position, the support shaft 44 and the jack beam side. At the other intersection of the first circle C1 whose radius is the line segment connecting the fixing pins 62 and the third circle C3 whose radius is the line segment connecting the second fixing pins 632 and the fixing pin 62, the jack beam side The fixing pin 62 is arranged so as to be positioned (see FIG. 10).

  Next, FIG. 5 to FIG. 5 will be described with respect to the posture when the jackup device 23 according to the present embodiment is used, the work performed by the boom 14 or the posture when the vehicle is traveling, and the attachment work of the link member 61 in the posture when the vehicle is transferred. It demonstrates in order, referring to 10.

  5 and 6 are views showing a state in which the jack-up device 23 according to the present embodiment has a posture in use, FIG. 5 is a perspective view of the jack-up device 23, and FIG. 6 is a plan view of the jack-up device 23. It is a figure.

  As shown in FIGS. 5 and 6, in the posture of the jack-up device 23 in use, the jack beam 42 extends along the longitudinal direction of the car body 21 from the center line O passing through the support shaft 44 toward the traveling device 24 side frame. It is in a position rotated by 60 ° within a predetermined range that does not interfere with 26. In this state, the jack beam side pin hole 611 of the link member 61 is inserted into the jack beam side fixing pin 62, and the first pin hole 612 of the link member 61 is inserted into the first fixing pin 631 of the jack frame 41. By connecting the beam side fixing pin 62 and the first fixing pin 631 with the link member 61, the position of the jack beam with respect to the jack frame 41 is fixed.

  7 and 8 are views showing a state in which the jack-up device 23 according to the present embodiment has a posture when the boom 14 is working or the vehicle is running. FIG. 7 is a perspective view of the jack-up device 23. FIG. 6 is a plan view of the jack-up device 23.

  As shown in FIG. 7 and FIG. 8, when the boom 14 is working or the vehicle is running, the jack beam 42 is substantially perpendicular to a position along the front-rear direction of the car body 21, for example, the front surface of the jack frame 41. In position. In this state, the jack beam side pin hole 611 of the link member 61 is inserted into the jack beam side fixing pin 62, and the second pin hole 613 of the link member 61 is inserted into the second fixing pin 632 of the jack frame 41. By connecting the beam side fixing pin 62 and the second fixing pin 632 with the link member 61, the position of the jack beam 42 with respect to the jack frame 41 is fixed.

  9 and 10 are views showing a state in which the jack-up device 23 according to the present embodiment is in a posture when the vehicle is transferred. FIG. 9 is a perspective view of the jack-up device 23, and FIG. 10 is a jack-up device 23. FIG.

  As shown in FIGS. 9 and 10, in the posture of the vehicle during transfer, the jack beam 42 is in a direction along the axle 22, that is, in a position substantially parallel to the front surface of the jack frame 41. In this state, the jack beam side pin hole 611 of the link member 61 is inserted into the jack beam side fixing pin 62, and the second pin hole 613 of the link member 61 is inserted into the second fixing pin 632 of the jack frame 41. By connecting the beam side fixing pin 62 and the second fixing pin 632 with the link member 61, the position of the jack beam 42 with respect to the jack frame 41 is fixed.

  According to the crawler crane 101 according to the present embodiment configured as described above, the jack-up device 23 has a plate shape that connects the jack beam side fixing pin 62 and the jack frame side fixing pin 63 instead of the lock pin 52. Since the link member 61 is used to fix the position of the jack beam 42 with respect to the jack frame 41, the space d for inserting and removing the lock pin 52 shown in FIG. 13 need not be provided.

  Therefore, the jack-up device 23 can make the distance D between the upper surface of the jack beam 42 and the lower surface of the revolving structure 13 smaller than the space d (D <d), as shown in FIG. The height H can be set to be larger than the height h of the jack beam 42 of the related art (H> h). As a result, since members having a small plate thickness can be used for the upper surface plate 421, the lower surface plate 422, and the side surface plate 423 of the jack beam 42, it is possible to improve the strength of the jackup device 23 and realize weight reduction.

  Further, in the crawler crane 101 according to the present embodiment, the plate-shaped link member 61 is provided with three fixing pin insertion holes of the jack beam side pin hole 611, the first pin hole 612, and the second pin hole 613. Only by using the link member 61, the jack beam 42 can be firmly fixed to the use position, the working / traveling position, and the storage position around the support shaft 44. As a result, the space of the link member 61 can be saved, and the manufacturing cost of the jackup device 23 can be reduced.

  Further, in the crawler crane 101 according to the present embodiment, the diameter of the first fixing pin 631 and the diameter of the second fixing pin 632 of the jack frame 41 are set to different sizes, so that work by the boom 14 or traveling of the vehicle is performed. When changing from the posture at the time of using the jack-up device 23 to the posture at the time of using the jack-up device 23, the operator removes the second pin hole 613 of the link member 61 from the second fixing pin 632 of the jack frame 41, and then the first fixing pin It is possible to prevent the jack beam 42 from being accidentally inserted into the 631, and to fix the position of the jack beam 42 with respect to the jack frame 41 quickly and reliably. As a result, the posture of the jack-up device 23 can be changed efficiently, so that the convenience can be improved when mounting or removing the traveling devices 24 during transportation of the vehicle.

  It should be noted that the above-described present embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to one including all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of one embodiment can be added to the configuration of another embodiment.

  Further, in the present embodiment, the case where the diameter of the jack beam side fixing pin 62 and the diameter of the first fixing pin 631 are set to the same dimension has been described, but the present invention is not limited to this case, and the jack beam side fixing pin is fixed. The diameter of the pin 62 and the diameter of the first fixing pin 631 may be set to different sizes, or the diameter of the jack beam side fixing pin 62 and the diameter of the second fixing pin 632 may be set to the same size. .

  Furthermore, although the case where the diameter of the first fixing pin 631 is set to be larger than the diameter of the second fixing pin 632 has been described in the present embodiment, the present invention is not limited to this case, and the diameter of the first fixing pin 631 is not limited to this case. May be set smaller than the diameter of the second fixing pin 632.

11 ... Running body, 13 ... Revolving structure, 14 ... Boom (working device), 21 ... Car body, 21A ... Revolving bearing, 22 ... Axle, 23 ... Jack-up device, 24 ... Traveling device, 26 ... Side frame, 31 ... Crawler belt 41 ... Jack frame, 42 ... Jack beam, 43 ... Jack cylinder, 44 ... Support shaft, 46 ... Connecting pin, 47, 48 ... Stopping pin, 61 ... Link member, 61A ... Base piece, 61B ... Leg piece, 62 … Jack beam side fixing pin, 63… Jack frame side fixing pin 101… Crawler crane (crawler work vehicle), 411… Support shaft insertion hole, 421… Top plate, 422… Bottom plate, 423… Side plate, 423A… Penetration Holes, 424 ... Support shaft mounting brackets, 424A ... Support shaft insertion holes, 424B ... Through holes, 431 ... Cylinder tubes, 432 ... Ndaroddo, 433 ... float, 434 ... ribs, 434A ... through hole 611 ... jack beam side pin hole, 612 ... first pin hole, 613 ... second pin hole, 631 ... first locking pin, 632 ... second locking pin

Claims (4)

A traveling body, a revolving structure that is rotatably mounted on the traveling structure, and a work device that is mounted on the revolving structure. The traveling structure includes a car body that supports the revolving structure, and a car body that supports the revolving structure. A plurality of axles that are respectively provided at the left and right positions of the front and rear ends and that extend so as to project in the left and right direction from the car body, and a pair of traveling devices that are disposed on the tip end sides of these axles and that include a side frame and a crawler belt, A crawler-type work vehicle having a plurality of jack-up devices that are respectively arranged in front of and behind the car body and that elevate and lower the traveling body,
Each of the plurality of jack-up devices,
A jack frame attached to the front end or rear end of the car body,
A jack beam having a base end attached to the jack frame and extending horizontally from the jack frame,
Is attach to the tip of the jack beam, the jack cylinder for stretching the lead straight direction,
A support shaft that pivotally supports the jack beam in a horizontal plane with respect to the jack frame,
A jack beam side fixing pin fixed to a position apart from the support shaft on the upper surface of the jack beam,
A jack frame side fixing pin fixed to the upper surface of the jack frame,
A crawler that is insertable and removable from above the jack beam side fixing pin and the jack frame side fixing pin, and is provided with a plate-shaped link member that connects the jack beam side fixing pin and the jack frame side fixing pin. Work vehicle. A traveling body, a revolving structure that is rotatably mounted on the traveling structure, and a work device that is mounted on the revolving structure. The traveling structure includes a car body that supports the revolving structure, and a car body that supports the revolving structure. A plurality of axles that are respectively provided at the left and right positions of the front and rear ends and that extend so as to project in the left and right direction from the car body, and a pair of traveling devices that are disposed on the tip end sides of these axles and that include a side frame and a crawler belt, A crawler-type work vehicle having a plurality of jack-up devices that are respectively arranged in front of and behind the car body and that elevate and lower the traveling body,
Each of the plurality of jack-up devices,
Jack frames attached to the center of the front and rear ends of the car body,
A jack beam having a base end attached to the jack frame and extending horizontally from the jack frame,
A jack cylinder that is vertically attached to the tip of the jack beam and that extends and contracts in the vertical direction by separating from and contacting the jack frame,
A support shaft that pivotally supports the jack beam in a horizontal plane with respect to the jack frame,
A jack beam side fixing pin fixed to a position apart from the support shaft on the upper surface of the jack beam,
A jack frame side fixing pin fixed to the upper surface of the jack frame,
The jack beam side fixing pin and the jack frame side fixing pin can be inserted and removed from above, and a plate-shaped link member that connects the jack beam side fixing pin and the jack frame side fixing pin is provided,
The jack frame side fixing pin includes a first fixing pin and a second fixing pin fixed to be adjacent to each other on the base end side of the jack beam on the upper surface of the jack frame,
The link member is
A jack beam side pin hole into which the jack beam side fixing pin is inserted at one end side,
A first pin hole and a second pin hole through which the first fixing pin and the second fixing pin are inserted, respectively, on the other end side;
When the jack up device in which the jack beam is projected in the left-right direction is used, the jack beam side pin hole is inserted into the jack beam side fixing pin, and the first pin hole is formed in the first fixing pin. Inserted into the
When the jack beam is in a posture along the front-back direction of the car body, the jack beam side pin hole is inserted into the jack beam side fixing pin and the second pin hole is inserted into the second fixing pin,
The jack beam side pin hole is inserted into the jack beam side fixing pin, and the second pin hole is inserted into the second fixing pin when the jack beam is in a posture of the vehicle during transportation along the axle. A crawler type work vehicle characterized by the above. The crawler type work vehicle according to claim 2,
A crawler work vehicle, wherein the diameter of the first fixing pin and the diameter of the second fixing pin are different from each other. The crawler type work vehicle according to claim 2,
When the jack beam rotates around the support shaft, a circle having a radius that is a line segment connecting the support shaft and the jack beam side fixing pin connects the first fixing pin and the jack beam side fixing pin. The jack beam side fixing pin is located at an intersection with a circle having a line segment as a radius, and a circle having a line segment connecting the support shaft and the jack beam side fixing pin as a radius, the second fixing pin and the A crawler type working vehicle, wherein the jack beam side fixing pin is located at an intersection with a circle having a radius connecting a line connecting the jack beam side fixing pins.