JP6247457B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine suitable for pile driving or well excavation in a narrow and low-vacuum site.

  Patent document 1 is disclosing the pile driver suitable for the operation | work in the field of a low sky head.

  The pile driving machine disclosed in Patent Document 1 includes a rotation driving device including a pile mounting hole, and the pile mounted in the pile mounting hole is rotationally driven by the rotation driving device. This rotational drive device is provided in the reader so that it can be raised and lowered. Then, the pile driving operation is performed by the leader lowering the rotation drive device in the vertical direction while the rotation drive device rotates the pile around the rotation axis in the vertical direction. The leader is connected to a hydraulic cylinder that rotates the leader 90 degrees from the vertical direction to the horizontal direction. By the operation of the hydraulic cylinder, the leader is displaced from the vertical direction to the horizontal direction, and the rotation shaft of the rotary drive device provided in the leader is also changed in direction from the vertical direction to the horizontal direction. In this way, the pile is attached and detached in a state where the rotation shaft of the rotation drive device is arranged in the horizontal direction.

  However, in the pile driving machine disclosed in Patent Document 1, both the weight of the leader and the weight of the rotary drive device are provided in each part of the mechanism for turning the leader and the rotary drive device integrally. It takes. For this reason, it is necessary to ensure the strength of each part of the mechanism, and it is necessary to increase the size of the parts and to ensure high robustness. This increases the cost and also increases the size of the entire pile driver. Large pile drivers are unsuitable for work in confined areas.

JP 2011-1719 A

  An object of the present invention is to improve the inconveniences of the conventional example, and to provide a construction machine suitable for pile driving or well excavation in a low head and in a narrow area.

In order to solve this problem, the present invention adopts the following configuration. That is,
A reader that can be erected in the vertical direction, a rotary drive device that moves up and down in the vertical direction along the reader and rotates at least the pile around the first rotation axis in the vertical direction, and a support mechanism such as a boom In a construction machine comprising: a base machine that supports the first pile; and a means for displacing the first rotation shaft that rotates at least the pile from a vertical direction to a substantially horizontal direction.
The slider includes a slider that moves up and down in the vertical direction along the reader. The slider is equipped with the rotation drive device, and the rotation drive device itself rotates so that the first rotation shaft is displaced from the vertical direction to a substantially horizontal direction. A hydraulic cylinder mechanism for urging the rotation of the rotary drive device itself, fixing one end of the hydraulic cylinder mechanism to the slider, and fixing the second rotating shaft to be fixed to the slider. A construction machine in which the other end portion of the pressure cylinder mechanism is fixed to the rotation driving device or a member that rotates integrally with the rotation driving device.

  According to the present invention, by expanding and contracting the hydraulic cylinder mechanism, only the rotation drive device provided in the slider rotates, and the rotation shaft of the pile or the like is displaced from the vertical direction to the substantially horizontal direction. At that time, the reader is not rotated. Therefore, compared to the case where both the reader and the rotary drive device are rotated as in the prior art disclosed in Patent Document 1, the load on the hydraulic cylinder mechanism can be reduced, and the hydraulic cylinder mechanism and The strength and power required for the surrounding structure will be gradual, and it will be possible to reduce parts costs, as well as to reduce the size of parts and to reduce the size of construction machinery. It is possible to provide a construction machine that is suitable not only for work but also for narrow land.

  ADVANTAGE OF THE INVENTION According to this invention, the construction machine suitable for the pile driving or the well excavation in the site | area where the height was restrict | limited and a narrow land can be provided.

The schematic block diagram of the construction machine which shows 1st Embodiment of this invention. The block diagram around the slider shown in FIG. The block diagram around the slider shown in FIG.

  Hereinafter, a first embodiment of the present invention will be described. In the schematic configuration diagram of FIG. 1, the construction machine of this embodiment includes a base machine 10 including a crawler-type self-propelled device. The end of the base machine 10 in front of the driver's seat includes a reader 1, a slider 2 that moves up and down along the reader 1, and a rotary drive device 3 that is fixed to the slider 2. The reader 1 is fixed to an end portion of the base machine 10 in front of the driver's seat via a boom mechanism 4 (support mechanism). In addition, a two-point (rear left and right) outrigger 5 is provided at an end of the base machine 10 at the rear of the driver's seat.

  The configuration around the slider 2 is as shown in FIGS. FIG. 2 shows a state viewed from the side of the driver's seat side as in FIG. FIG. 3 shows a state viewed from the front of the driver's seat. The reader 1 is formed in a plate shape having a width in the depth direction of the paper surface of FIG. 2, and includes convex rails 11 that engage with the slider 2 on both side surfaces in the width direction. In this embodiment, the reader 1 is not a telescopic type but has a fixed length, and the lift stroke of the slider 2 is fixed according to this height.

  The slider 2 is formed in a plate shape that is somewhat narrower than the reader 1, and concave guides 21 are fixed at four upper and lower positions on both side surfaces in the width direction. Each concave guide 21 meshes with a convex rail 11 provided in the reader 1, and the guide 21 slides along the rail 11, so that the slider 2 slides along the reader 1. In addition, a spacer 22 is provided between the slider 2 and the reader 1 to keep the gap between the reader 1 and the slider 2 constant and to ensure the stability of the slide. A bearing is provided at a portion where the guide 21 and the spacer 22 fixed to the slider 2 are in contact with the reader 1, and a smooth sliding operation between them is realized.

  Further, below the slider 2, a rotation support mechanism 23 that rotatably supports the rotation driving device 3 is provided. The rotation support mechanism 23 supports the rotation driving device 3 on the surface of the slider 2 opposite to the reader 1. A rotation shaft 24 (second rotation shaft, support shaft) when the rotation support mechanism 23 rotates the rotation drive device 3 is set in the normal direction of the surface on which the slider 2 is equipped with the rotation drive device 3.

  The rotation drive device 3 includes a pile or the like mounting hole which is a through-hole through which a pile (steel pipe pile) or excavating tools is inserted in the center, and the pile inserted through the pile or the like mounting hole is centered on the first rotation shaft 31. To rotate. A chuck mechanism for fixing the pile or the like is provided inside the pile or the like mounting hole. In the present embodiment, the chuck mechanism is configured to fix a pile or the like by hydraulic pressure. In addition, a pile with a plurality of diameters can be fixed by exchanging the frames mounted on the chuck mechanism with frames of different sizes. The rotary drive device 3 is equipped with a hydraulic drive device 32. The hydraulic drive device 32 includes a hydraulic motor for rotationally driving a pile and the like, a transmission mechanism for the rotational force, and a hydraulic system for driving the chuck.

  A handle member 33 fixed to the rotation driving device 3 is provided between the rotation driving device 3 and the slider 2. The handle member 33 rotates around the second rotation shaft 24 integrally with the rotation driving device 3. One end of the hydraulic cylinder 6 (shaft rotating device) is connected to the end of the handle member 33 away from the rotating shaft 24. The other end of the hydraulic cylinder 6 is fixed to the upper end of the slider 2. The end of the handle member 33 is pushed or pulled according to the expansion and contraction of the hydraulic cylinder 6, whereby the handle member 33 and the rotation driving device 3 rotate integrally around the second rotation shaft 24 (hydraulic cylinder 6 Each part is positioned so that the extension line in the expansion / contraction direction and the rotation shaft 24 do not cross each other). At this time, since the posture (angle) of the hydraulic cylinder 6 changes as the end of the handle member 33 rotates, one end of the hydraulic cylinder 6 is rotatably connected to the end of the handle member 33. In addition, the other end of the hydraulic cylinder 6 is fixed to the upper end of the slider 2 so as to be rotatable. FIG. 2 shows a state in which the hydraulic cylinder 6 is contracted. At this time, in a state where the reader 1 and the slider 2 are erected in the vertical direction, the first rotation axis for rotating the piles and the like is in the vertical direction. It is set up. On the other hand, FIG. 3 shows a state in which the hydraulic cylinder 6 is extended, and at this time, the first rotation axis for rotating the pile or the like is set in the horizontal direction.

  As shown in FIG. 3, the reader 1 is provided with a pair of hydraulic cylinders 7 and 7 (slide drive devices) that extend and contract in parallel with the slide direction of the slider 2. When the reader 1 and the slider 2 are erected in the vertical direction, the longitudinal direction of the hydraulic cylinders 7 and 7 is the vertical direction. The tubes of the hydraulic cylinders 7 and 7 are fixed to the leader 1 with a gap on both sides in the width direction of the leader 1. On the other hand, the rods of the hydraulic cylinders 7 and 7 are disposed below the tubes, and a connecting member 71 is bridged between the rod head portions of the hydraulic cylinders 7 and 7. The lower end portion of the slider 2 is fixed to the connecting member 71, so that the connecting member 71 and the slider 2 slide along the reader 1 according to the expansion and contraction of the hydraulic cylinders 7 and 7. Each part is positioned so that the slider 2 is not detached from the reader 1 in any state from the extended state to the contracted state of the rods of the hydraulic cylinders 7 and 7.

  In the present embodiment, the above-described hydraulic cylinders 6, 7, and 7, the hydraulic motor and hydraulic chuck of the rotation driving device 3, the boom mechanism 4 and the outrigger 5 are operated by hydraulic pressure. Oil pressure from a hydraulic pressure source is supplied to each of these devices operating with hydraulic pressure via a distributor. The supply of hydraulic pressure to each device is controlled by opening and closing the valve of the distributor according to the operation of the operation element.

  When performing a pile driving work, the leader 1 is erected in the vertical direction by the boom mechanism 4. Further, the pile is inserted through the mounting hole such as the pile of the rotation driving device 3 and fixed by the chuck mechanism. The hydraulic cylinders 7, 7 are contracted to position the slider 2 and the rotary drive device 3 fixed to the slider 2 above the reader 1, and the rotary drive device 3 rotates the pile around the first rotary shaft 31. 7 and 7 are gradually extended, and the slider 2 is gradually lowered in the vertical direction. At this time, the hydraulic cylinder 6 is in a contracted state, and the direction of the first rotating shaft 31 of the rotary drive device 3 is set in the vertical direction. As the slider 2 descends, the rotary drive device 3 descends, and the pile is pressed into the ground while rotating. When the hydraulic cylinders 7 and 7 are extended and the slider 2 and the rotary drive device 3 are lowered to the lower side of the leader 1, the chuck mechanism is released to release the pile, and the hydraulic cylinders 7 and 7 are contracted and fixed to the slider 2 and the slider 2 again. The rotary drive device 3 is positioned above the reader 1. Then, the pile is grasped again by the chuck mechanism, and the above rotary press-fitting operation is repeated. Thereby, pile driving is performed.

  When using a steel pipe pile with a tip blade, etc., when the pile is mounted on the rotary drive device 3, the hydraulic cylinder 6 is extended and the rotary drive device 3 is rotated around the second rotary shaft 24 to mount the pile etc. The hole and the first rotation shaft 31 are positioned in a substantially horizontal direction. If a steel pipe pile with a tip blade or the like is attached to the attachment hole such as a pile in this state, the attachment work of the pile can be easily performed. When performing the pile driving work, as described above, the hydraulic cylinder 6 is contracted, and the mounting holes for the piles of the rotation driving device 3 and the first rotation shaft 31 are set in the vertical direction.

  At this time, according to the present embodiment, only the rotation driving device 3 is rotated without rotating the reader 1 and the slider 2, so that the reader and the rotation driving device are not connected as in the prior art disclosed in Patent Document 1. Compared to rotating both, the load on the hydraulic cylinder 6 (shaft rotating device) can be reduced, and the strength and power required for the shaft rotating device and its peripheral structure are reduced, reducing the part cost. In addition to being able to reduce the size of parts and the size of construction machines, it is possible to provide construction machines that are suitable not only for low-head work but also for narrow spaces. be able to.

  Here, the present invention is not limited to the embodiment described above, and the scope of the present invention is the scope of the invention described in the claims. The hydraulic cylinder as the shaft rotating device may include a link mechanism and a gear mechanism in order to fix both ends of the hydraulic cylinder so as to be rotatable. Further, as the base machine 10, an existing machine such as a small hydraulic excavator or a backhoe may be used. The construction machine according to the present invention can be manufactured by modifying the machine.

DESCRIPTION OF SYMBOLS 1 Reader 2 Slider 3 Rotation drive device 4 Support mechanism 5 Outrigger 6 Hydraulic cylinder (shaft rotation device, hydraulic cylinder mechanism)
7 Hydraulic cylinder (slide drive)
DESCRIPTION OF SYMBOLS 10 Base machine 11 Rail 12 Rotation fulcrum 21 of support mechanism Guide 22 Spacer 23 Rotation support mechanism 24 2nd rotating shaft 31 1st rotating shaft 32 Hydraulic drive device 33 Handle member 71 Connecting member

Claims (1)

A reader that can be erected in the vertical direction, a rotary drive device that moves up and down in the vertical direction along the reader and rotates at least the pile around the first rotation axis in the vertical direction, and a support mechanism such as a boom In a construction machine comprising: a base machine that supports the first pile; and a means for displacing the first rotation shaft that rotates at least the pile from a vertical direction to a substantially horizontal direction.
The slider includes a slider that moves up and down in the vertical direction along the reader. The slider is equipped with the rotation drive device, and the rotation drive device itself rotates so that the first rotation shaft is displaced from the vertical direction to a substantially horizontal direction. A hydraulic cylinder mechanism for urging the rotation of the rotary drive device itself, fixing one end of the hydraulic cylinder mechanism to the slider, and fixing the second rotating shaft to be fixed to the slider. construction machine and the other end of the pressure cylinder mechanism is fixed to the rotary drive equipment.

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