JP5692249B2 - Assembling, disassembling, and transporting attachment members for construction machines, and the attachment member stand - Google Patents

Description

  The present invention relates to a method for assembling, disassembling, and transporting an attachment member that constitutes a work attachment in a construction machine such as an excavator or a demolition machine, and an attachment member gantry used in this method.

  A construction machine such as an excavator or a demolition machine includes a crawler-type lower traveling body 1 shown in FIG. 11 and an upper revolving body 2 mounted on the lower traveling body 1 so as to be rotatable about an axis O perpendicular to the ground. A work attachment is mounted on the front portion of the base machine 3 consisting of

  The work attachment includes a main boom 4 that is mounted on the base machine 3 (upper revolving unit 2) so that it can be raised and lowered, a front boom 6 that is attached to the tip of the main boom 4 via a boom connection block 5, and the front boom. 6 and an arm (not shown) attached to the tip of the arm via an arm connection block 7, and a working device such as a bucket is attached to the tip of the arm.

  In FIG. 11, 8 is a boom raising / lowering cylinder for raising and lowering the main boom 4, 9 is a front boom cylinder for turning the front boom 6 up and down, and 10 is an arm cylinder for turning the arm connection block 7 (arm) up and down.

  In such a construction machine with a work attachment, when assembling and disassembling the work attachment, the attachment member, which is a component of the work attachment, is horizontally supported on the ground by the gantry and is attached to and detached from other adjacent attachment members in this state. .

  As an example, FIGS. 11 and 12 show, as an example, when the attachment is disassembled, the front boom 6, the boom connection and arm connection blocks 5 and 7, and the front boom and arm cylinders 9 and 10 (hereinafter referred to as an attachment member). This is a case where the main boom 4 is removed and transported by the trailer 15.

  Procedure 1: As shown in FIG. 11, the attachment member A is tilted forward and the front end portion (arm connection block 7) is supported by the mount 11.

  The gantry 11 is self-supporting with its lower surface grounded, and its upper end is attached to the tip of the attachment member A with a pin or the like.

  Procedure 2: The attachment member A is suspended by a lifting machine such as a crane (only the suspension rope 12 is shown in the figure), and the main boom 4 is slightly raised and lowered with the load supported to some extent (if necessary, the base machine 3 By adding a self-propelling function), the connection pins 13 and 14 that connect the main boom 4 and the attachment member A (boom connection block 5) are unloaded and the pins 13 and 14 are removed.

  Procedure 3: As shown in FIG. 12, the attachment member A is lifted with the gantry 11 attached, and loaded on the carriage 16 of the transport trailer 15.

  At this time, the rear end portion (boom connection block 5) of the attachment member A is supported by the carriage 16, and the front end portion (arm connection block 7) is supported by the mount 11.

  In this way, the attachment member A is transported by trailer, lowered to the ground in the reverse procedure to the above at the arrival site, and connected to the main boom 4 and the arm which are transported separately to assemble the attachment.

  On the other hand, those described in Patent Documents 1 and 2 are known as methods for assembling, disassembling, and transporting attachment members using a gantry.

JP 2011-102517 A JP 2010-163823 A

  In the prior art including the techniques described in Patent Documents 1 and 2, if the gantry 11 for assembly and disassembly is used as it is as a gantry during trailer transportation as shown in FIG. 12, the overall height H during transportation increases. There was a problem that the legal limit was exceeded.

  For this reason, it must be replaced with another low frame during transportation, and the workability of assembly, disassembly, and transportation is poor, and two types of frames for assembly, disassembly, and transportation must be prepared. It was also disadvantageous in terms of handling.

  Note that it is conceivable to lower the gantry 11 so that the total height H during transportation falls within the legal limits. However, in this case, even if the attachment is lowered during assembly and disassembly in a machine in which the tilt angle of the attachment is limited. Defects such as not reaching the mount occur.

  Therefore, the present invention is an assembly, disassembly, and disassembly of an attachment member for a construction machine that can keep the total height dimension during transportation within legal limits while using a gantry with a height suitable for assembly and disassembly as it is for transportation. A transportation method and a mounting base for the attachment member are provided.

  As means for solving the above problems, in the method of the present invention, the attachment member constituting the work attachment is attached to the upper end portion of the gantry supporting the attachment member so as to be rotatable about the horizontal axis in the left-right direction. The gantry is configured to be able to change its posture between a standing posture that stands perpendicular to the grounding surface and a tilting posture that falls along the grounding surface. The gantry includes a grounding part in the standing posture and a tilting posture in the falling posture. A grounding part and a load receiving part that receives the load of the attachment member in a tilted position are provided, and the above-mentioned stand is placed in a standing posture on the ground, and the attachment / detachment work for attaching / detaching the above-mentioned attachment member to / from another attachment member is performed. As a tilted posture, the trailer is transported integrally with the attachment member.

  Moreover, in the gantry of the present invention, the upper end portion has a mounting portion, and by this mounting portion, the attachment member constituting the work attachment rotates around the horizontal axis in the left-right direction and stands perpendicular to the ground plane. It is configured to be attachable in a posture changeable between a standing posture and a tilted posture that falls along the grounding surface, and the grounding portion in the standing posture, the grounding portion in the tilted posture, and the attachment member in the tilted posture The load receiving part which receives the load of this is provided (Claim 7).

  According to this method and the gantry, it is possible to lower the gantry height by tilting the gantry during the trailer transportation of the attachment member, and to keep the overall height dimension during the transportation within legal limits.

  In the method of the present invention, it is preferable that the mount is attached to the distal end portion of the attachment member, and this mount is transported by trailer in a forward tilted posture in which an attachment point with respect to the attachment member is located forward (Claim 2). .

  In the gantry of the present invention, it is preferable that the grounding portion in the tilted position is provided on the lower surface side of the pedestal in the tilted position in which the attachment point with respect to the attachment member is located forward (Claim 8).

  In this specification, the attachment tip side (arm side) is referred to as “front” and the root side (main boom side) is referred to as “rear” with reference to the attachment assembly and disassembly shown in FIGS. Therefore, the traveling direction at the time of transporting the trailer is backward for the attachment member.

  When trailer transportation is performed with the tip of the attachment member supported by the gantry, the gantry may be tilted forward or backward from the viewpoint of reducing the overall height during transportation.

  However, if the attachment point (upper end portion) with respect to the attachment member is in the rearward tilting position located rearward, the gantry protrudes forward from the tip portion of the attachment member, so that the entire length of the attachment member including the gantry becomes long.

  On the other hand, the total length of the attachment member including the gantry can be shortened by tilting the gantry forwardly as in claims 2 and 8. For this reason, it is advantageous in terms of length limitation during trailer transportation.

  In the method and the gantry of the present invention, it is desirable that the ground contact portion in the tilted posture is set on the lower surface of the rear end portion in the tilted posture (claims 3 and 9).

  In this way, the carriage can be grounded to the trailer carriage in the traveling direction ahead of the attachment point with respect to the attachment member during transportation of the trailer, and the front-rear dimension necessary for placing the attachment member on the trailer carriage can be reduced. Shorter ones can be used.

  In the method of the present invention, the support base is placed at the lower end of the gantry, the horizontal is the standing posture of the gantry, the vertical is the tilted posture, the respective lower surfaces are the grounding portions, and the left and right ends are outside the width of the attachment member. The support base is provided with protruding legs on the left and right ends of the support base that protrude outside the width of the attachment member so that it protrudes backward in a standing position and upward in a tilted position. It is desirable that the attachment member is positioned on the inner side of the both overhanging feet.

  In the gantry of the present invention, a support base is provided at the lower end of the gantry so that the left and right ends protrude outside the width of the attachment member. The support base includes a grounding portion in the standing posture and a tilted posture. A grounding part and a load receiving part are provided, and overhanging legs are provided on both the left and right end parts so as to protrude rearward in a standing position and upward in a falling position. Further, it is desirable to configure so as to be located inside.

  By so doing, it is possible to increase the ground contact area of the support base by the wide setting of the support base and the both overhanging legs to increase the tumbling angle of the gantry, that is, to stabilize the gantry in a standing posture.

  In addition, the attachment member enters between the overhanging feet when the gantry is tilted down (both overhanging feet are located outside the width of the attachment member), so attachments such as piping of the attachment member do not interfere with the overhanging feet. .

  In the method and the gantry of the present invention, by setting the center of gravity of the entire gantry in front of the attachment point with respect to the attachment member in the standing posture, the gantry is tilted forward while the attachment member is lifted by a lifting machine. It is desirable to hang down in an inclined posture (in the case of a gantry, it is configured to hang down) (claims 5 and 11).

  If it carries out like this, it will become easy to fall down when a platform is brought down to the front in the preparation stage of trailer transportation.

  In this case, in the method of the present invention, it is desirable that the gantry is tilted on the ground and fixed to the attachment member, and the attachment member and the gantry are lifted together and loaded on the trailer cart.

  In this way, workability is better than when the cradle is brought down on the trailer carriage, or when the cradle and the attachment member are once separated on the ground and separately lifted and set again on the carriage.

  According to the present invention, it is possible to keep the total height during transportation within legal limits while directly using a gantry having a height suitable for assembly and disassembly for transportation.

It is a side view which shows the step which attaches a mount frame to the front-end | tip part of an attachment member as the procedure 1 at the time of attachment decomposition | disassembly by embodiment of this invention. It is a side view which shows the state which supported the attachment member with the mount frame as the procedure 2 similarly. FIG. 6 is a side view of the state in which the attachment member including the gantry is lifted as procedure 3 in the same manner. FIG. 5 is a side view of the state in which the gantry is grounded as Procedure 4 in the same manner. FIG. 10 is a side view of the state in which the gantry is in a forward-falling posture and is fixed to the attachment member as Procedure 5; FIG. 11 is a side view showing a state in which the attachment member is lifted integrally with the gantry and loaded on the trailer cart as procedure 6; It is a perspective view of the mount frame concerning the embodiment of the present invention. It is the perspective view seen from the different direction of the same mount. It is a front view in the standing posture of the platform. It is a front view in the fall posture of the platform. It is a side view of the state which supported the attachment member with the mount as procedure 1 at the time of attachment disassembly by the conventional method. It is a side view of the state which loaded the attachment member on the trailer with the mount frame similarly.

  An embodiment of the present invention will be described with reference to FIGS.

  In the embodiment, in accordance with the description of the background art, a main boom 4, a front boom 6 attached to the front end of the main boom 4 via a boom connection block 5, and an arm connection block 7 at the front end of the front boom 6. A work attachment consisting of an arm (not shown) attached via the front boom 6, and a front boom 6, boom and arm both connection blocks 5 and 7, and a front boom and both arm cylinders 9 and 10. A case where a certain attachment member A is removed from the main boom 4 and transported by trailer will be described as an example.

  1 to 10, the same parts as those shown in FIGS. 11 and 12 are denoted by the same reference numerals, and redundant description thereof is omitted.

  FIG. 1 shows a stage in which the gantry 21 is attached to the tip of the attachment member A, and FIG. 2 shows a state in which the gantry 21 is grounded to support the tip of the attachment member A.

  The structure of the gantry 21 will be described with reference to FIGS.

  The gantry 21 is configured such that a support base 23 as a grounding tool is attached to a lower end portion of the gantry body 22 so as to protrude from the gantry body 22 to the left and right sides.

  The gantry body 22 is constituted by a pair of left and right plate-like columns 24 and 24 that are long in the vertical direction, for example.

  An attachment hole 25 penetrating in the left-right direction as an attachment portion for the attachment member A is provided at the upper end portion of the gantry main body 22 (both struts 24, 24). As shown in FIGS. The attachment pin 26 (horizontal axis in the left-right direction) is inserted across the arm connection pin hole (reference numeral omitted) provided at the distal end portion (arm connection block 7) of the attachment member A.

  As a result, the gantry 21 is attached to the tip of the attachment member so as to be rotatable around the attachment pin 26, and is perpendicular to the ground surface (the ground surface or the loading surface of the trailer carriage 16) as shown in FIGS. As shown in FIGS. 5, 6, and 10, the posture can be changed between a standing posture and a falling posture that falls forward along the ground contact surface.

  Note that “forward tilt” refers to a tilted posture in which the attachment points (mounting holes 25 and mounting pins 26) of the gantry 21 with respect to the attachment member A are positioned forward and the support base 23 is positioned backward, respectively.

  The support base 23 is formed by attaching projecting legs 29 and 29 extending in the front-rear direction to the left and right ends of a pair of front and rear beam members 27 and 28 made of a square pipe or the like so as to protrude rearward in a stand-up posture. The posture is horizontal and the tilted posture is vertical.

  That is, in the standing posture, the lower surface of the support base 23 serves as a grounding portion, and the front surface of the base in this standing posture serves as a grounding portion in a tilted posture.

  In other words, the lower surface of the rear end portion of the gantry 21 in the collapsed posture serves as a ground contact portion in the collapsed posture.

  Further, the upper surface of the gantry 21 in the tilted position, that is, the rear surface 28a (shown in FIGS. 8 and 10) of the rear beam member 28 in the standing position serves as a load receiving portion that supports the load of the attachment member A. Hereinafter, the rear surface of the rear beam member 28 is referred to as a “load receiving portion”.

  The load receiving portion 28a is provided with rubber or wooden receiving tools 30 (see FIGS. 8 and 10) for protecting the load receiving portion 28a on the left and right side portions in contact with the attachment member A.

  The support base 23 is formed wider than the gantry main body 22 so as to protrude from the gantry main body 22 to the left and right sides. The area is large enough to increase the front and rear, left and right fall angles to increase stability.

  Further, due to the wide setting of the support base 23, the attachment member A is supported by the load receiving portion 28a on the inner side of the both overhanging legs 29, 29 in a tilted posture of the gantry 21.

  On the other hand, as shown in FIGS. 1 to 3, the center of gravity G of the gantry 21 is set to be positioned forward of the attachment point with respect to the attachment member A in the standing posture.

  By setting the center of gravity, as shown in FIG. 3, when the attachment member A is lifted with the gantry 21 attached, the gantry 21 is configured to hang down naturally in a tilted posture.

  In addition, regarding the reference numerals of the respective parts of the gantry, only the sign “21” of the whole gantry and the symbol “23” of the support base are attached to FIGS.

  A method for disassembling and transporting the attachment member A using the gantry 21 will be described.

  Procedure 1: As shown in FIG. 1, with the attachment member A lowered horizontally or slightly forwardly lowered, the gantry 21 is lifted by a lifting machine such as a crane (only the suspension rope 12 is shown) to attach the attachment member A. It attaches to the front-end | tip part of this with the attachment pin 26. FIG.

  In this case, if the platform 21 is tilted forward by lifting the platform 21 forward from the center of gravity G as shown in the drawing, the mounting work including the positioning of the platform 21 and the attachment member A becomes easier.

  Procedure 2: After mounting the gantry, as shown in FIG. 2, the attachment member A is lowered to ground the gantry 21 in a standing posture, and the tip of the attachment member A is supported by the gantry 21.

  In this state, the attachment member A is suspended to support the load to some extent, and then the pins 13 and 14 connecting the main boom 4 and the attachment member A are removed to separate them.

  Procedure 3: As shown in FIG. 3, the detached attachment member A is once lifted and the mount 21 is suspended by its own weight.

  At this time, the gantry 21 is in a forward tilted posture by the above-described center of gravity setting.

  Procedure 4: As shown in FIG. 4, the attachment member A is lowered and the mount 21 is grounded.

  At this time, since the gantry 21 is tilted forward, the pedestal 21 is naturally tilted forward as the attachment member A is lowered to the ground, so that the posture shown in FIG.

  Procedure 5: As shown in FIG. 5, the gantry 21 is fixed to the attachment member A (for example, the front boom 6) in a tilted posture by a fixture 31 such as a wire or a chain block.

  Procedure 6: As shown in FIG. 6, the attachment member A with a gantry is transported on the carriage 16 of the transport trailer 15.

  In this case, as described above, the lower surface of the rear end portion in the tilted posture of the gantry 21 serves as a grounding portion.

  The assembly of the attachment member A after transportation (connection with the main boom 4) is performed by procedures and operations reverse to those described above.

  In this way, since the gantry 21 is tilted during the trailer transportation of the attachment member A, the gantry height is lowered, and the total height H (see FIG. 6) during the trailer transportation is reduced from the prior art shown in FIG. Can be within limits.

  In this case, since the carriage 21 is transported by trailer in a forward tilted state, that is, in a state of being held by the lower surface side of the attachment member A, the carriage 21 does not protrude forward from the tip of the attachment member A. For this reason, the full length at the time of transportation can be shortened compared with the case where it falls down afterward.

  In addition, according to the above method and the gantry 21, the following effects can be obtained.

  (i) Since the grounding portion in the tilted posture of the gantry 21 is set on the lower surface of the rear end portion in the tilted posture, in other words, the lower surface of the rear end portion in the tilted posture of the gantry 21 is grounded. When the trailer is transported, the front-rear direction dimension L2 required for placing the attachment member A on the trailer carriage 16 can be made smaller than the front-rear direction dimension L1 in the prior art shown in FIG. For this reason, the trailer carriage 16 having a short vehicle length can be used.

  (ii) Since the support base 23 at the lower end of the gantry is wider than the attachment member A, and the projecting legs 29 and 29 are provided at the left and right ends of the base 23 so as to protrude rearward in the standing posture, The gantry 21 can be stabilized in a standing posture by the setting and the overhanging feet 29 and 29.

  In addition, since the attachment member A is supported on the inner side of the both side projecting feet 29 and 29 in the tilted posture of the gantry 21, there is no possibility that accessories such as piping of the attachment member A interfere with the projecting feet 29 and 29.

  (iii) By setting the center of gravity G of the entire gantry 21 forward from the attachment point with respect to the attachment member A in a standing posture, the gantry 21 tilts forward while the attachment member A is lifted as shown in FIG. Since it is configured to hang down in a posture, it is easy to fall when the gantry 21 is tilted forward in preparation for trailer transportation.

  (iv) As shown in FIGS. 4 to 6, the gantry 21 is tilted on the ground and fixed to the attachment member A with the fixture 31, and the attachment member A and the gantry 21 are lifted together and loaded on the trailer carriage 16. Compared with the case where the pedestal 21 is tilted on the trailer carriage 16 or when the pedestal 21 and the attachment member A are once separated on the ground and separately lifted and reset on the carriage, the workability is good.

Other embodiments
(1) In the above embodiment, the gantry 21 is tilted forward when transporting the attachment member A in the trailer. However, from the standpoint of reducing the overall height H during transport of the trailer, it is the opposite of the above embodiment. You may make it fall after the fall.

  (2) In the above embodiment, the lower surface of the rear end portion of the gantry 21 in the forward tilted posture is grounded, but the lower surface of the intermediate portion in the forward tilted posture may be grounded.

  (3) In the above embodiment, the load receiving portion of the gantry 21 is set on the upper surface of the rear beam 28 constituting the gantry main body 22 in the tilted posture. For example, between the left and right support columns 24 and 24 constituting the gantry main body 22 It is good also as a load receiving part spanning a beam member.

  (4) The present invention is not limited to the attachment member A composed of the front boom 6 and the two connection blocks 5 and 7 in the work attachment provided with the main and front booms 4 and 6 and the arms mentioned in the above embodiment. The same can be applied to various attachment members constituting the attachment.

4 Main Boom 5 Boom Connection Block 6 Front Boom 7 Arm Connection Block A Attachment Member 15 Transport Trailer 16 Trailer Dolly 21 Mounting Base 23 Mounting Base Support Base 25 Mounting Holes as Mounting Sections 26 Mounting Pins 27 and 28 Beam material 28a Load receiving part of gantry (back surface of beam material)
29 Overhang leg of mount G Center of gravity of mount 31 Fixing tool

Claims (11)

  By attaching the upper end of the gantry supporting the attachment member to the attachment member constituting the work attachment so as to be rotatable about the horizontal axis in the horizontal direction, the gantry is brought into contact with a standing posture standing perpendicular to the ground plane. The posture can be changed to a tilted posture that falls down along the ground, and the platform includes a grounding portion in the standing posture, a grounding portion in the tilted posture, and a load receiver that receives the load of the attachment member in the tilted posture. The assembly member is mounted on the ground in the standing posture, and the attachment member is attached to and detached from other attachment members, and the trailer is transported by trailer integrally with the attachment member in the tilted posture. Assembling, disassembling and transporting the attachment members of the construction machine.   2. The attachment of a construction machine according to claim 1, wherein the mount is attached to a tip portion of the attachment member, and the mount is trailer-transported in a forward-falling posture in which an attachment point with respect to the attachment member is located forward. How to assemble, disassemble and transport parts.   The method for assembling, disassembling and transporting an attachment member for a construction machine according to claim 2, wherein the grounding portion in the tilted posture of the gantry is set on the lower surface of the rear end portion in the tilted posture.   A support base is provided at the lower end of the gantry in a state where the gantry is horizontal in a standing posture, vertical in a tilted posture, and each lower surface serves as a grounding portion, and both left and right end portions project outside the width of the attachment member, Protruding feet are provided on the left and right ends of the support base that project outside the width of the attachment member in a state of projecting backward in a standing position and upward in a tilted position, and the attachment member is mounted on both sides in a tilted position of a gantry. 4. The method of assembling, disassembling, and transporting an attachment member for a construction machine according to claim 3, wherein the attachment member is located on the inner side of the projecting foot.   By setting the center of gravity of the entire gantry in front of the attachment point with respect to the attachment member in the standing posture, the gantry is suspended in a forward tilted posture while the attachment member is lifted by a lifting machine. A method for assembling, disassembling, and transporting an attachment member for a construction machine according to any one of claims 2 to 4.   The construction machine attachment according to any one of claims 1 to 5, wherein the frame is fixed to an attachment member in a tilted position on the ground, and the attachment member and the frame are lifted together and loaded on a trailer carriage. How to assemble, disassemble and transport parts.   An attachment member gantry for a construction machine used in the assembly, disassembly, and transportation method of the attachment member for a construction machine according to any one of claims 1 to 6, having an attachment portion at an upper end portion thereof. The attachment part can be attached to the attachment member that constitutes the work attachment so that the posture can be changed between a standing posture that is rotated around the horizontal axis in the left-right direction and is perpendicular to the ground surface and a tilted posture that falls down along the ground surface. An attachment for a construction machine comprising: a grounding portion in the standing posture; a grounding portion in the tilted posture; and a load receiving portion that receives a load of the attachment member in the tilted posture. Material stand.   8. The attachment member pedestal for a construction machine according to claim 7, wherein the ground contact portion in the tilted posture is provided on a lower surface side of the pedestal in a tilted posture in which the attachment point with respect to the attachment member is located forward.   The attachment member pedestal for a construction machine according to claim 8, wherein the ground contact portion in the tilted posture is provided on a lower surface side of the rear end portion of the pedestal in the forward tilted posture.   A support base is provided at the lower end of the gantry with both left and right ends projecting out of the width of the attachment member. The support base includes a grounding portion in the standing posture, a grounding portion in a tilted posture, and a load receiving portion. Each of the left and right ends is provided with protruding legs that protrude rearward in a standing position and upward in a tilted position so that the attachment member is positioned on the inner side of the both protruding legs in the above-mentioned tilted position. 10. The attachment member mount for a construction machine according to claim 8 or 9, characterized in that it is configured.   By setting the center of gravity of the entire gantry in front of the attachment point for the attachment member in the standing posture, the entire gantry hangs down in a tilted posture with the attachment member being lifted by a lifting machine. The gantry for an attachment member for a construction machine according to any one of claims 8 to 10.

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