JP6548469B2 - Construction machinery - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a construction machine, and more particularly to a crawler traveling large construction machine which is loaded on a trailer of a trailer with a side frame provided with the crawler removed during transportation.

  When transporting a large crawler-traveling construction machine, such as a pile driver or a crawler crane, not only the leader or boom but also the side frame equipped with the crawler can be removed from the base machine due to weight and size limitations. There is a need (see, for example, Patent Document 1). In addition, a storable scaffold (step) is provided as an auxiliary tool for raising and lowering to the driver's cab and checking equipment in the equipment room (see, for example, Patent Documents 2 and 3).

JP, 2014-240574, A JP 2007-137570 A Japanese Utility Model Application Publication No. 4-14544

  The scaffolds described in Patent Documents 2 and 3 are used in the working state of a construction machine, and are not considered at all for use at the time of transportation. However, raising and lowering to the operator's cab can be done relatively easily and safely by using the crawler when working, but when the side frame is removed during transportation and loaded on the loading platform, the crawler can be Because it can not be used and it is at a high place above the bed, it was necessary to prepare a ladder and a stepladder separately.

  Then, this invention aims at providing the construction machine provided with the structure which can perform raising / lowering to a driver's cab easily and safely in the state which removed the side frame at the time of conveyance and loaded on the loading platform.

In order to achieve the above object, a construction machine according to the present invention is a crawler traveling construction machine in which a truck frame from which a side frame of a lower traveling body is removed is loaded 90 on a loading platform while transporting a base machine. In the above, the elevating step is provided on the front or rear surface of the track frame, and the elevating step is a step mounting member detachably provided on the front or rear surface of the track frame, and the step mounting member And the step mounting member has an arc-shaped guide slit, and the end of the guide slit is directed toward the inner circumference of the arc and has a tip end at the both ends of the guide slit. An engagement slit cut downward is provided, and the step body is provided with a guide rod moving in the guide slit and the engagement sleeve. It is characterized in that it is provided a long hole corresponding to and.

Furthermore, the construction machine according to the present invention is the crawler traveling construction machine in which the truck frame from which the side frame of the undercarriage is removed is loaded by 90 degrees while being carried by the base machine. A lifting step is provided on the front or rear surface of the track frame, and the lifting step is provided rotatably relative to the step supporting member fixed on the front or rear surface of the track frame And the step supporting member has an arc-shaped guide slit, and the both ends of the guide slit are cut so that the tip of the step slit is directed downward. A step-in engagement slit is provided, and the step body is provided with a guide rod moving in the guide slit and an elongated hole corresponding to the engagement slit. It is characterized in that there. The elevating step is characterized in that it can be stored within the width of the loading platform when not in use.

  According to the construction machine of the present invention, when the side frame including the crawler is removed and the track frame is rotated by 90 degrees and loaded on the loading platform, it is provided on the front or rear of the track frame located on the side of the loading platform By using the lifting step, lifting up and down to the cab can be performed easily and safely.

The 1st form example of the construction machine of this invention is shown, and it is a side view which shows the state loaded on the carrier of a trailer. It is also a front view. It is a front view of the principal part similarly. It is a side view of the principal part similarly. It is a top view of the principal part similarly. The 2nd form example of the construction machine of the present invention is shown, and it is a side view showing the state where it was loaded on the carrier of a trailer. It is also a front view. It is a front view of the principal part similarly. It is a side view of the principal part similarly.

  1 to 5 show a first embodiment in which the present invention is applied to a crawler traveling type large construction machine such as a crawler crane, a pile driver, and an earth drill. First, as is well known, when a crawler traveling type large construction machine loads and transports the base machine 12 on the loading platform 11a of the trailer 11, the upper revolving unit 13 relates to the front equipment such as the boom and the leader, the counterweight Etc., and the side frame including the crawler is removed from the lower traveling body, and when loading the cargo bed, the track frame 14 of the lower traveling body is rotated 90 degrees to the lower portion of the upper swing body 13 There is. That is, in the track frame 14, the side frame attachment portions 15, 15 of the track frame 14 are positioned in the longitudinal direction of travel of the trailer 11, and the front or rear portion of the track frame 14 is positioned to the side of the trailer 11. It has become.

  In the first embodiment, when lifting up to the cab 13a, the outer surface of the side frame attachment portion 15 located below the step 13b provided in the lower part of the cab 13a of the upper revolving superstructure 13 when the loading platform is loaded The lifting and lowering step 21 is detachably attached. The side frame attachment portion 15 at the portion to which the elevating step 21 is attached is formed by connecting the upper frame member 15a and the lower frame member 15b, which are thick plates, by the left and right connection plates 15c and 15c. Both side edges of the lower frame member 15b project slightly outward from the connecting plates 15c, 15c.

  The elevating step 21 includes a step mounting member 22 mounted on the track frame 14 in a state of straddling the upper frame member 15 a of the side frame mounting portion 15, and a step body 23 rotatably mounted on the step mounting member 22. It is formed of The step attachment member 22 is formed in a shape corresponding to the size of the step body 23, and is bent upward from the rectangular bottom plate portion 24 arranged in the horizontal direction and both side edges of the bottom plate portion 24. And a pair of mounting arms 26 extending horizontally from the upper portion on the base side of both step supporting portions 25 longer than the width dimension of the upper frame member 15a, and each mounting Locking portions 27 bent downward from the tip of the arm 26, horizontal female screw members 28 respectively provided at the lower ends of the locking portions 27, and butterfly bolts screwed respectively to the female screw members 28 And 29.

  The pair of step support portions 25 has an axial hole 30 for pivotally mounting the step body 23 at the lower end on the distal end side, and extends from the upper end on the distal end side of the step support portion 25 to the lower end on the proximal end An engagement slit having an arc-shaped guide slit 31 provided, and cut at both ends of the guide slit 31 so that the tip is directed downward toward the inner circumference of the arc. 32, 33 are provided respectively. In addition, the step support portion 25 is formed in such a size that the tip end fits within the width dimension of the loading platform 11 a when attached to the track frame 14, and the protruding end of the upper frame member 15 a is avoided in the upper portion on the base side. A notch 25a is provided for the purpose. Further, on the outer surface of the step support portion 25, a handle portion 25b used at the time of attachment and detachment and the like is provided.

  On the other hand, the step body 23 is formed of a step member 34 which becomes horizontal when using the step, and a pair of guide plate portions 35, 35 fixed to both ends of the step member 34. The two guide plate portions 35 are provided with a rotary shaft 36 pivotally attached to the shaft hole 30 and a guide rod 37 moving in the guide slit 31. Both ends of the guide rod 37 An elongated hole 38 having a shape corresponding to the engagement slits 32 and 33 is provided so as to be movable in the arc inward and outward directions.

  The raising and lowering step 21 formed in this way is stored separately from the construction machine at the time of construction machine operation, and the side frame attachment portion 15 of the track frame 14 with the construction machine being transported and the side frame removed. Mounted in place. Mounting of the elevating step 21 is carried out by inserting the mounting arm 26 inward of the side frame mounting portion 15 through the upper side of the upper frame member 15a with the butterfly bolt 29 loosened, and then the mounting arm 26 of the upper frame member 15a. The wing bolt 29 is tightened in a state of being along the upper surface, and the elevating step 21 is fixed so as to sandwich the side frame attachment portion 15 between the tip of the wing bolt 29 and the base of the step support portion 25.

  When the step body 23 is used as shown by a solid line in FIG. 3, the guide rod 37 is positioned at the lower end of the long hole 38 and the engagement slit 32 so as to be fixed in the use state. In order to bring the step body 23 into the storage state shown by an imaginary line in FIG. 3, the front end portion of the step body 23 is lifted in a state where the guide rod 37 is lifted so as to be positioned at the upper end The guide rod 37 is moved backward and downward in the guide slit 31 by turning around the pivot shaft 36 so as to tilt backward and the guide rod itself at the end of the guide slit 31 It moves to the lower end of the long hole 38 and the engagement slit 33 by the weight, and prevents rotation of the step body 23 automatically and fixes it in the stored state. In this storage state, the step body 23 is in a state of being fitted between the two step mounting members 22.

  The elevating step 21 attached in this manner is the operating room 13a by projecting the step main body 23 so as to be in use, and in particular, by making the main body 13 project larger than the step 13b provided in the lower part of the operating room 13a. It can be lifted easily and safely. Furthermore, by being in the storage state, it can be stored within the width of the loading platform 11a, and the trailer 11 can be run in a state in which the elevating step 21 is attached. In addition, since there is no need to process the track frame 14 and the side frame attachment portion 15 or attach a separate member, it is possible to cope with existing construction machines.

  6 to 9 show a second embodiment of the present invention. In the following description, the same components as the components of the construction machine shown in the first embodiment are designated by the same reference numerals, and the detailed description is omitted.

  The raising and lowering step 51 shown in the second embodiment is provided with a step supporting member 52 fixed on the front or rear surface of the track frame 14 and a step rotatably provided with respect to the step supporting member 52. And a main body 53. The mounting position of the step support member 52 with respect to the track frame 14 is a position regardless of whether the side frame is attached or detached and is not related to traveling or turning during operation, usually, the width of the front face or rear face of the track frame 14 Set in the center of the direction.

  The step support member 52 is fixed to the outer surface of the connection plate 14 a located on the outer side of the track frame 14 with a bolt or the like via the mount plate 54, and is formed in a shape corresponding to the size of the step body 53. ing. That is, a rectangular bottom plate portion 55 disposed in the horizontal direction, a pair of step support portions 56 bent in the upper direction respectively from both side edges of the bottom plate portion 55, and both step support portions 56 And a mounting piece 57 bent outward from the proximal end side.

  The pair of step support portions 56 is formed in the same manner as the step support portion 25 shown in the first embodiment, and has an axial hole 30 for pivotally mounting the step main body 53 at the lower end on the tip side. An arc-shaped guide slit 31 centered on the hole 30 is provided. At both ends of the guide slit 31, engaging slits 32, 33 are provided, which are cut in such a manner that the tip is directed downward toward the inner circumferential side of the arc. Further, the step support portion 56 is formed in such a size that the tip end fits within the width dimension of the loading platform 11a when attached to the track frame 14, and the handle portion 56a is provided on the outer surface.

  Furthermore, the step main body 53 is also formed in the same manner as the step main body 23 shown in the first embodiment, and a step member 34 which becomes horizontal when using the step, and a pair fixed to both ends of the step member 34. The guide plates 35, 35 are formed in the following. The both guide plate portions 35 are provided with a pivot shaft 36 pivotally attached to the shaft hole 30 and a guide rod 37 moving in the guide slit 31, and both ends of the guide rod 37 It is movably provided by the long hole 38 of the shape corresponding to the joint slits 32 and 33.

  Also in the raising and lowering step 51 shown in the second embodiment, raising and lowering the step main body 53 from the step 13 b and using the step body 53 can raise and lower the driver's cab 13 a easily and safely. Also, by placing the step body 53 in the stored state, it does not interfere with traveling or turning during work, and can be contained within the width of the loading platform 11a during transportation, so the traveling of the trailer 11 is adversely affected. There is no giving. Moreover, since it is not necessary to attach or detach the raising / lowering step 51, the workability at the time of conveyance can be improved.

  Further, in both of the embodiments, the guide rod 37 is movably attached to the long hole 38 and is automatically engaged with the engagement slits 32 and 33 in the use state and the storage state. Since the step main body 23 can be turned simply by slightly moving the guide rod 37, the workability is also good.

  The storage structure of the step body can adopt an appropriate structure depending on the size of the step body, etc. The mounting structure and mounting position of the elevating step can be selected according to the structure of the track frame. is there. Further, holding of the use state and the storage state may use another fixing means.

DESCRIPTION OF SYMBOLS 11 ... Trailer, 11a ... loading platform, 12 ... Base machine, 13 ... Upper revolving body, 13a ... Driving room, 13b ... Step, 14 ... Track frame, 14a ... Connecting plate, 15 ... Side frame attachment part, 15a ... Upper frame member , 15b: lower frame member, 15c: connecting plate, 21: lifting step, 22: step mounting member, 23: step body, 24: bottom plate portion, 25: step supporting portion, 25a: notch portion, 25b: handle portion, Reference Signs List 26: mounting arm, 27: locking portion, 28: female screw member, 29: butterfly bolt, 30: axial hole, 31: guide slit, 32, 33: engaging slit, 34: step member, 35: guide plate portion , 36: rotation axis, 37: guide rod, 38: elongated hole, 51: lifting step, 52: step supporting member, 53: step body, 54: mounting plate, 55: bottom plate portion, 56: step Support portion, 56a ... handle section, 57 ... mounting piece

Claims (3)

A crawler traveling type construction machine in which a track frame from which a side frame of a lower traveling body is removed is turned 90 degrees during loading of a base machine and is loaded on a loading platform. Set up the steps,
The elevating step has a step mounting member detachably provided on a front surface or a rear surface of the track frame, and a step body rotatably provided with respect to the step mounting member.
The step mounting member has an arc-shaped guide slit, and at both ends of the guide slit, engaging slits are provided so that the tip is directed downward toward the inner circumference of the arc.
The construction machine , wherein the step body is provided with a guide rod moving in the guide slit, and an elongated hole corresponding to the engagement slit . A crawler traveling type construction machine in which a track frame from which a side frame of a lower traveling body is removed is turned 90 degrees during loading of a base machine and is loaded on a loading platform. Set up the steps,
The elevating step includes a step supporting member fixed to a front surface or a rear surface of the track frame , and a step body rotatably provided with respect to the step supporting member.
The step support member has an arc-shaped guide slit, and at both ends of the guide slit, engaging slits are provided so that the tip is directed downward toward the inner circumference of the arc.
The construction machine , wherein the step body is provided with a guide rod moving in the guide slit, and an elongated hole corresponding to the engagement slit . The construction machine according to claim 1 or 2 , wherein the raising and lowering step is formed so as to be storable within the width of the loading platform when not in use.

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