JP6366312B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine, and more particularly to a construction machine provided with a rear frame for mounting a device such as a generator (welder) on the rear part of an upper swing body.

  A large construction machine, for example, a large pile driver, is known in which a gantry for mounting a generator and a hydraulic unit is provided at the rear part of the upper swing body. The gantry is detachably formed at the rear of the upper swing body, for example, above the counterweight, or is formed by extending the frame of the upper swing body rearward (see, for example, Patent Document 1). .

JP 2001-233134 A

  Usually, the pedestal that can be attached to and detached from the upper revolving structure is formed in such a size that can mount various sizes of devices as described in the prior art section of Patent Document 1 above. The amount of protrusion to the rear of the revolving structure becomes large, and when the mount is attached, the turning operation in a narrow place may not be performed. On the other hand, in the case of a pedestal with the frame extended rearward, although the turning operation is not affected by reducing the protruding amount of the frame, as described in Patent Document 1, it is stored as a device to be mounted. Equipment that had possible work steps had to be used. Furthermore, with large pile drivers, the operation of the equipment mounted on the gantry is a work at a high place, so it is not only cumbersome to operate, but safety must also be considered.

  In addition, the large pile driver disassembles and transports the lower traveling body, upper revolving structure, leader, backstay, etc., and assembles them at the construction site. In the case of a small pile driver that can be transported without being disassembled, only the mounting and demounting of the mount must be specially carried out, and a truck for transporting the mount must be arranged separately. There was also.

  Therefore, the present invention has an object to provide a construction machine including a rear mount for mounting an apparatus having a structure suitable for a small pile driving machine that can be transported by simply tilting a leader without being disassembled in a working state. It is said.

To achieve the above object, a construction machine of the present invention, the a lower traveling structure, an upper revolving structure which is provided pivotably at the top of the lower traveling body, a working device provided in the front of the upper revolving structure In a construction machine including a counterweight provided at a rear end portion of the upper swing body, a stowed state rising along the rear end surface of the upper swing body and a rearward direction of the upper swing body at the rear portion of the counterweight A rear frame that can be rotated in a protruding state is provided, and the rear frame is detachably mounted via a mounting plate, and a rotation shaft is attached to a pair of left and right support members provided on the mounting plate. It is characterized by being attached so that rotation is possible .

Furthermore, the construction machine of the present invention, the rear surface of the front SL counterweight, upward engagement member downwardly engaging member provided on the front side of the mounting plate to support the mounting plate engages is provided It is characterized by that.

A cylinder for rotating the rear frame between a storage state and a use state; a frame holding means for holding the rear frame in the storage state and the use state; and an upper portion of the counterweight. An auxiliary counterweight that can be attached to and detached from is provided.

  According to the construction machine of the present invention, the rear frame is provided at the rear part of the upper swing body so as to be rotatable between the housed state and the use state. By turning it into a use state, it is possible to perform a predetermined operation with various devices mounted on the rear part of the upper swing body. In addition, when the device is unnecessary, the workability in a narrow place can be improved by turning the rear frame to the storage state.

  Furthermore, by attaching to the rear part of the upper swing body and the counterweight via the mounting plate, the rear base can be easily attached and detached, and when the rear base is attached or detached by providing an engaging member The fall of the rear frame can be prevented. In addition, by rotating the rear frame between the storage state and the use state with the cylinder, the rear frame can be rotated safely and easily, and holding means for holding the rear frame in the use state and the storage state By providing this, the rear frame can be reliably held in the used state or the stored state. Furthermore, by providing an auxiliary counterweight, the burden on the lower traveling body can be reduced.

It is a side view which shows one example of the construction machine of this invention. It is also a plan view. It is a side view which similarly shows the state in transit. It is a rear view of an upper revolving structure. It is a side view of the rear stand which shows the state which mounted the apparatus as a use condition. It is a side view of the rear frame made into the accommodation state. It is VII-VII sectional drawing of FIG.

  FIG. 1 thru | or FIG. 7 has shown the form example which applied this invention to the small pile driving machine made into the steel pipe pile embedding specification. This pile driving machine 11 can be raised and lowered via a leader support 15 on the front part of the upper turning body 13 and a base machine 14 provided with an upper turning body 13 on the lower traveling body 12 through a turning bearing. An upper leader 16, a lower leader 17 provided at the front end of the upper swing body 13 and connected to the lower part of the upper leader 16, a leader hoisting cylinder 18 for supporting the upper leader 16 from the rear, A hose support column 19 that can be raised and lowered behind the upper leader 16 at the front of the swivel body 13, a hose support column hoisting cylinder 20 that supports the hose support column 19 from the rear, and the front, rear, left and right of the upper swivel body 13 Jack 21 provided at each of the four locations, a counterweight 22 provided at the rear end of the upper swing body 13, and a rear portion of the counterweight 22. And a rear frame 23.

  A pair of left and right guide pipes 24 are continuously provided in the upper leader 16 and the lower leader 17 in the longitudinal direction, and a working device 26 such as an auger drive is provided on the guide pipe 24 via a guide give 25 so as to be lifted and lowered. Yes. A lower brace 27 is provided at the lower end of the lower reader 17. The working device 26 includes a rack and pinion type lifting device that meshes with a rack 28 that is continuously provided in front of the upper leader 16 and the lower leader 17 and lifts the working device 26, and penetrates the working device 26. A drive device that rotationally drives the output shaft 29 is provided. The output shaft 29 includes square shaft portions 29a and 29b fitted to the output portion of the driving device at the lower and upper end portions, and the lower end portion is connected to the upper end portion of the steel pipe pile to be embedded. A portion 29c is provided.

  At the time of steel pipe pile embedding work, in the state shown in FIG. 1, the upper end portion of the steel pipe pile (not shown) is connected to the steel pipe pile connecting portion 29 c of the output shaft 29, and the steel pipe pile is rotated through the output shaft 29. By lowering the working device 26 along the upper leader 16 and the lower leader 17, the steel pipe pile is pressed into the ground. When connecting and embedding a plurality of steel pipe piles, the connection between the previously buried steel pipe pile and the output shaft 29 is released, the working device 26 is raised above the upper leader 16, and then the steel pipe to be buried While connecting the upper part to the output shaft 29 and connecting the lower end part of the next steel pipe and the upper end part of the steel pipe buried previously by welding, the rotation of the steel pipe pile and the lowering of the working device 26 are repeated.

  When transporting the pile driving machine 11, as shown in FIG. 3, after lowering the working device 26 to the lower leader 17, the leader leader hoisting cylinder 18 moves the upper leader 16 to the hose support strut hoisting cylinder. 20, the hose support column 19 is tilted rearward, and the top sheave block 16 a at the upper end of the leader is brought into a horizontal state, whereby the lower traveling body 12 is actuated to rise up to the loading platform of the low floor trailer (gooseneck trailer) 30 Can be transported in this state. Thus, the pile driving machine 11 shown in this embodiment is formed in a size that can be transported without disassembling the base machine 14 and the leaders 16 and 17.

  The rear frame 23 is attached to the rear surface of the counterweight 22 provided at the rear end of the upper swing body 13 via an attachment plate 32 that is fixed in a detachable manner by six fixing bolts 31. A pair of left and right support members 33 are provided at the lower portion of the mounting plate 32, and a rotation plate portion 36 protruding from the rear portion of the gantry frame 35 via the rotation shaft 34 on the support member 33 is rotatable. It is attached. A plurality of pin holes 33 a, 33 b, 36 a, and 36 b for inserting a detent pin 37 are provided on the support member 33 and the rotation plate portion 36 on a single arc centered on the rotation shaft 34. ing. Further, stopper bolts 38 a and 38 b are provided on the upper and lower portions of the mounting plate 32, respectively, for abutting the rotating end portion of the rotating plate portion 36 to define the rotating position of the gantry frame 35. Further, the front side surface of the mounting plate 32, that is, the surface on the counterweight side, engages with an upward engagement member 39 provided on the rear surface of the counterweight 22 to prevent the mounting plate 32 from falling. A joint member 40 is provided.

  In addition, a gantry rotating cylinder 41 for rotating the gantry frame 35 is provided at the upper center of the mounting plate 32 so as to be covered with a cover 42, and the gantry rotating cylinder 41 is provided on one side. Is provided with a hydraulic pipe 43 for extending and contracting. The rod tip 41 a of the gantry rotating cylinder 41 and the tip of the rotating arm 44 protruding from the rear portion of the gantry frame 35 are connected by a connecting pin 45, and the gantry frame 35 shortens the gantry rotating cylinder 41. 5, as shown in FIG. 5, the rear rotating body 41 is rotated to a use state protruding horizontally from the rear lower end of the upper revolving body 13, and the gantry rotating cylinder 41 is extended. It is formed so as to rotate to a stowed state that rises along.

  A mounting plate 46 is attached to the upper surface of the gantry frame 35 by mounting bolts 47, and is further placed on both the left and right edges and the rear edge of the gantry frame 35 so as to protrude above the upper surface of the mounting plate 46. A plurality of guide protrusions 48, 48 for positioning the plate 46 are provided. A device mounted on the mounting plate 46, for example, the welding power source 49, can be prevented from dropping from the rear pedestal 23 due to vibration during operation by screwing the bottom portion to the mounting plate 46.

  On the other hand, a recess 22 a for accommodating the auxiliary counterweight 50 is provided at the upper center of the counterweight 22. The auxiliary counterweight 50 is removed when a device such as a welding power source 49 is mounted on the rear frame 23, thereby balancing the weight of the upper swing body 13 and reducing the burden on the lower traveling body 12 including the swing bearing. can do.

  In this way, the rear frame 23 that can be rotated between the storage state and the use state is provided at the rear end lower part of the upper swing body 13, and as shown in this embodiment, when performing the steel pipe embedding work with the welding work, By mounting the welding power source 49 on the rear pedestal 23, it is not necessary to move the welding power source 49 using a crane when the pile driving machine 11 moves to the next work position, thereby improving workability. Can be made. Further, when equipment such as the welding power source 49 is unnecessary, the turning radius can be reduced by keeping the rear mount 23 in the retracted state, so that the workability of various operations in a narrow place is not impaired. Furthermore, by attaching the rear frame 23 to the mounting plate 32 and forming the mounting plate 32 to be attached to and detached from the counterweight 22, the rear frame 23 can be easily attached to and detached from the upper swing body 13.

  Further, by providing the upward engagement member 39 and the downward engagement member 40, the rear frame 23 can be temporarily fixed to the rear surface of the counterweight 22, so that the fastening operation of the fixing bolt 31 is performed easily and safely. be able to. Furthermore, by inserting the locking pin 37 into the predetermined pin holes 33a, 33b, 36a, 36b and fixing it with the beta pin 37a, the rear frame 23 can be reliably held in the use state or the storage state. it can.

  And the height of the mounting board 46 is set to about 1 m by providing the rear stand 23 in the rear-end lower part of the upper turning body 13 in the pile driving machine 11 of the size which is comparatively small and can be transported without disassembling. Therefore, the switches of the welding power source 49 mounted on the mounting plate 46 can be operated from the ground. As a result, there is no need to provide a conventional scaffold or handrail around the rear frame 23, and the manufacturing cost of the rear frame 23 can be reduced and the operability of the devices can be improved.

  As mentioned above, since the small pile driver does not attach or detach the counterweight during transportation, the upper swing body and the counterweight are integrated, so even if the rear frame is attached to the counterweight There is no problem at all. On the other hand, in the case of a construction machine that attaches / detaches a counterweight, a mounting plate may be attached to the rear surface of the counterweight mounting portion protruding from the lower end of the upper swing body, or a support member may be provided to support the gantry frame. That's fine. Further, the present invention can be applied to various construction machines such as cranes, earth drills, ground improvement machines, etc. in addition to pile driving machines. In addition to the welding power source described above, a portable generator, hydraulic Various devices such as units and compressors can be placed.

DESCRIPTION OF SYMBOLS 11 ... Pile driver, 12 ... Lower traveling body, 13 ... Upper turning body, 14 ... Base machine, 15 ... Leader support, 16 ... Upper leader, 16a ... Top sheave block, 17 ... Lower leader, 18 ... Leader hoisting cylinder, DESCRIPTION OF SYMBOLS 19 ... Hose support column, 20 ... Hose support column raising / lowering cylinder, 21 ... Jack, 22 ... Counterweight, 22a ... Recess, 23 ... Rear mount, 24 ... Guide pipe, 25 ... Guide give, 26 ... Working device, 27 ... Bottom swing Stop, 28 ... Rack, 29 ... Output shaft, 29a, 29b ... Square shaft portion, 29c ... Steel pipe pile connecting portion, 30 ... Low floor trailer, 31 ... Fixing bolt, 32 ... Mounting plate, 33 ... Support member, 33a, 33b ... Pin hole, 34 ... Rotating shaft, 35 ... Mounting frame, 36 ... Rotating plate part, 36a, 36b ... Pin hole, 37 ... Non-rotating pin, 37a ... Beta pin, 38a 38b ... Stopper bolt, 39 ... Upward engaging member, 40 ... Downward engaging member, 41 ... Mount rotating cylinder, 41a ... Rod tip, 42 ... Cover, 43 ... Hydraulic piping, 44 ... Turning arm, 45 ... Connecting pin 46 ... Mounting plate, 47 ... Mounting bolt, 48 ... Guide protrusion, 49 ... Power source for welding, 50 ... Auxiliary counterweight

Claims (5)

A lower traveling body, an upper revolving body provided on the upper portion of the lower traveling body, a work device provided at a front portion of the upper revolving body, and a counterweight provided at a rear end portion of the upper revolving body; In the construction machine comprising Provided,
The rear mount is detachably attached via a mounting plate, and is attached to a pair of left and right support members provided on the mounting plate so as to be rotatable via a rotation shaft. Machine . The rear surface of the counterweight, according to claim 1, wherein the upward engaging member for supporting the mounting plate downward engaging member provided on the front side of the mounting plate is engaged with is provided Construction machinery. Construction machine according to claim 1 or 2, characterized in that it comprises a cylinder for rotating the rear frame in the retracted state and the used state. The construction machine according to any one of claims 1 to 3 , further comprising gantry holding means for holding the rear pedestal in a storage state and a use state. The construction machine according to any one of claims 1 to 4 , wherein a detachable auxiliary counterweight is provided on an upper portion of the counterweight.

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