JPS6134529B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a power shovel for use in excavation work, etc., in which a vibro device is constructed by attaching a chuck for holding earth retaining piles or missing boards to an exciter that generates vibrations in the vertical direction. Regarding a vibrating pile driving and pile extracting machine which is attached as an attachment to a bendable main arm of a power shovel, etc. This relates to the connection structure of.

The present applicant previously filed an application for a vibratory pile driving and pile extracting machine, which is constructed by attaching a vibro device, which is made up of a vibration exciter that generates vertical vibrations and a chuck for grasping piles, to a bendable main arm of a power shovel, etc. (Tokugansho
54-38800), however, in a vibrating pile driving/pulling machine attached to such a bendable main arm, as shown in Figure 1, the bending type The tip of arm B descends in an arcuate trajectory. However, in the vibrating pile driving and pulling machine shown in Fig. 1, the vibro device C is directly attached to the tip of the bendable main arm B of the power shovel via the auxiliary arm 3, so as the sheet pile D enters the ground, A longitudinal force acts between the vibro device C and the foldable main arm B. As a result, there were problems such as the perpendicularity of the sheet pile D driven into the ground becoming poor and unreasonable stress occurring in various parts of the vibrating pile driver.

The present invention was made in order to improve the problems of the vibrating pile driving machine of the earlier application as described above.
A bendable main arm such as a power shovel and a vibro device are connected via a first auxiliary arm that can be raised and lowered by a hydraulic cylinder and a second auxiliary arm that hangs vertically with respect to the first auxiliary arm. By connecting the bending type main arm and the vibro device, the force in the longitudinal direction that acts between the main arm and the vibro device is released, making it easier to drive sheet piles or piles vertically, and reducing the force generated in each part of the vibrating pile driving and pile extracting machine. The purpose of this invention is to provide a vibrating pile driving and pile extracting machine that relieves stress.

Hereinafter, the vibrating pile driving and pile extracting machine of the present invention will be explained based on the embodiments shown in Figs. 2 to 9. In Figs. 2 to 9, symbol A is a self-propelled power shovel body, and B is a The main arm B is a bendable main arm that is attached to the power shovel body A so that it can be raised and lowered freely.The arm B is formed by connecting a base end arm 1 and a tip end arm 2 with a pin 4 so that they can be bent.
When used as a power shovel, a bucket is attached to the tip of the distal arm 2, but in FIG. A state in which a vibro device C is attached through the holder is shown. Reference numeral C denotes a vibro device whose neck is rotatably pivoted to the second auxiliary arms 50, 50, and the vibro device C includes an exciter 5 that generates vibrations in the vertical direction; It consists of a chuck support device 29 at the bottom and a chuck 18 for gripping sheet piles or piles attached to the chuck support device 29.

This vibrating pile driving and pile pulling machine has three points: the joint between the power shovel body A and the foldable main arm B, the intermediate part of the foldable main arm B, and the joint between the tip of the main arm B and the first auxiliary arm 3. Hydraulic expansion and contraction device E,
F and G allow forcibly bending each other. This vibrating pile driving and pile extracting machine operates all operations related to the pile driving pile board from the control room K, such as gripping the sheet pile or pile D, starting the vibrator 5, and bending each bending part. I'm starting to be able to do it.

The first auxiliary arm 3 has a pair of arm members 3a, 3a, as shown in FIG.
Further, by connecting a rod of a hydraulic expansion/contraction device G attached to the main arm B side to a pin 48 installed on the second auxiliary arm 3, it is swingably attached to the tip of the main arm.

As shown in FIG. 7, the exciter 5 of the vibro device C has a drive rotor unit 16 driven by a hydraulic motor 6 inside its casing 7, and a drive rotor unit 16 that is connected to the drive rotor unit via gears 12, 12. 16
The driven rotor units 17 are arranged horizontally in parallel to each other and are rotated synchronously with the rotor unit 17. A semicircular eccentric weight 10 (eccentric mass 2W) is fixed to the shaft 8 of the drive side rotor unit 16, and a driven side rotor unit 17 is fixed to the drive side rotor unit 16.
There are two semicircular eccentric weights 11, 11 on the shaft 9.
(Each eccentric mass W) is fixed. The rotor units 16 and 17 are caused to rotate synchronously in opposite directions to cause the exciter 5 to generate vibrations in the vertical direction. In addition, eccentric weight 1
When the eccentric weights 10 and 11, 11 rotate synchronously in opposite directions, the centrifugal forces in the horizontal direction of the eccentric weights 10 and 11, 11 cancel each other out, so that no lateral vibration occurs. Incidentally, reference numeral 13 indicates a support bracket for attaching the exciter 5 to an example of a vibro support device. Further, on the lower surface 7a of the exciter 5, a chuck mounting flange 25 as shown in FIG. 6 is provided to protrude downward. The chuck 18 is attached to the chuck attachment flange 25 via a chuck support device 29.

The chuck support device 29 is for supporting the chuck 18 with respect to the exciter 5 so that it can rotate freely in the direction of arrow R-S, and as shown in FIG. Chuck mounting flange 14
A cylindrical rotating shaft 32 with a flange is fixedly fixed to the rotary shaft 32 and is rotatably supported by a pair of upper and lower thrust bearings 36, 36.

The chuck 18 is secured to the underside of the chuck support device 29. This chuck 18 is composed of a sharp fixed claw piece 19 and a movable claw piece 20 shorter than the fixed claw piece 19.
are moved forward and backward in the inward and outward directions by the hydraulic expansion and contraction device 22. A hydraulic pipe 39 (FIG. 6) is connected to this hydraulic expansion/contraction device 22 and is attached to the center of the chuck support device 29, so that the chuck 18 can be opened and closed from the cockpit K of the power shovel body A.
It is now possible to operate from Further, an L-shaped hook member 24 is attached to the lower end surface 20a of the movable claw piece 20 so as to face outward. This hook member 24 is for lifting one end of the sheet piles stacked on the ground as shown in FIG. and use it.

As shown in FIGS. 4 and 5, the vibro device C is pivotally connected to second auxiliary arms 50, 50 via a vibration-proof support member 59, which will be described later.

The anti-vibration support member 59 extends over the upper surface 60a and lower surface 60b of the spring case 60, which has a U-shaped cross-section, and has a pair of shafts 61, 61 and 61, which are appropriately spaced apart from each other.
61, and the center portions 61a of the shafts 61, 61 are fitted into the shaft holes 14, 14 provided in the support bracket 13 of the exciter 5, and the support bracket 13, the upper surface 60a of the spring case, and the spring are inserted. Compression springs 63 and 64 are respectively fitted between the lower surface 60b of the case and the lower surface 60b of the case.
This anti-vibration support member 59 has a shaft 61,
61, while vertical vibrations are absorbed by the expansion and contraction action of the compression springs 63 and 64. Therefore, the vertical vibration of the vibro device C transmitted to the foldable main arm B via the spring case 60 is significantly reduced.

Incidentally, in these compression springs 63 and 64, the compression spring 62 on the upper side has a smaller spring constant (smaller wire diameter) than the compression spring 64 on the lower side. This is because the vibration energy applied to the upper compression spring 63 is smaller than the vibration energy applied to the lower compression spring 64.

Incidentally, the reference numeral 62 indicates a guide member attached to the support bracket 13 for vertically sliding the shaft 61.

Further, a shaft 46 for rotatably supporting the vibro device C is provided protruding outward from the outer surface 60c of the spring case 60. This shaft 46 is pivotally supported by second auxiliary arms 50, 50. Second
The auxiliary arm 50 is formed into a flat plate shape with an appropriate length, and has one end 50a hanging vertically from the tip of the arm member 3a of the first auxiliary arm 3 through a shaft 45, and is pivotable. While it can be installed freely,
A pair of ball bearings 52, 52 are fitted into a bearing boss 51 provided on the other end side 50b, and the shaft 46 is rotatably mounted via the ball bearings 52, 52.

Therefore, as shown in FIG.
can be rotated relative to the arm member 3a of the first auxiliary arm 3 in the direction of arrow V-W (FIG. 3), which is the same direction as the bending direction of the foldable main arm B, and the vibro device C can be rotated relative to the arm member 3a of the first auxiliary arm 3. Arrow P- which is the same as the direction of analysis of main arm B
It is designed so that it can be relatively rotated in the Q direction.

Further, a detachable positioning device 70 is attached to the second auxiliary arm 50, which can temporarily fix the vibro device C in a state where it is rotated at a position substantially perpendicular to the longitudinal direction of the second auxiliary arm 50. It is being As shown in FIG. 5, this positioning device 70 includes a rolling portion 7 having a roller 81 that is always urged by a spring 80 so as to project outward.
1 and 71 are mounted above and below the bearing boss 51 provided on the second auxiliary arm 50 with the roller 81 facing outward, and a semi-circular recess 73 that engages the roller 81 in a convex-concave manner is provided. The spring case 60 includes a pair of stop members 72, 72 having
The recessed portions 73 are arranged inwardly facing each other on the upper side. When the vibro device C is rotated to a position substantially perpendicular to the second auxiliary arm 50, the positioning device 70 moves between the roller 81 and the stop member 7.
The second recess 73 is engaged with the second recess 73 in a concave and convex manner. By appropriately setting the spring force of the spring 80, this uneven engagement force is made so that it does not come off due to the rotational force of the vibro device C due to its own weight, but only when another operating force acts on the vibro device C. has been done. Reference numeral 85 denotes a stopper member provided on the spring case 60, which engages with the side surface of the second auxiliary arm 50 to limit the rotation of the vibro device C in the direction of arrow P by a certain angle θ ₁
(Fig. 4) or less (in the illustrated embodiment, θ ₁ ≒ 45
゜). The vibro device C can be rotated in the direction of the arrow Q from the position shown by the solid line in FIG. 4 to the position shown by the chain line by an angle θ ₂ ≈90°. Further, reference numeral 55 is a pointer attached to the shaft end of the shaft 46, and the second auxiliary arm 50
The inclination angle of the vibro device C with respect to the second auxiliary arm 50 is shown together with the scale plate 56 attached to the figure.

Next, we will explain the operation when operating sheet piles using the vibrating pile driving and pulling machine of the illustrated embodiment.
When carrying out work using this device, the sheet piles D are placed horizontally on the construction site and are stacked in an appropriate number of tiers. First, the hook 24 attached to the lower end of the movable claw piece 20 of the chuck 18 is inserted between the tip of the top sheet pile D and the tip of the second sheet pile D, and the tip of the top sheet pile D is moved upward. Lift it up a little. Even if a suitably sized wood J is inserted between the lifted top sheet pile D and the second sheet pile D below it and the hook 24 is removed, the tip of the top sheet pile D will not fall. Make sure not to. After doing this, the hook 24 is removed from the tip of the sheet pile D by operating the bendable main arm B. Next, from the state where the vibro device C is standing on the ground, the vibro device C is gradually brought forward by operating the foldable main arm B, and the rollers 81, 81 of the positioning device 70 and the receiving member 72,
72......to be engaged. This positioning device 7
0 is engaged, the vibro device C is suspended from the tip of the foldable main arm B in a state substantially parallel to the ground (FIG. 9). After this state, bendable main arm B
By this operation, the fixed claw piece 19 of the chuck 18 is inserted from the lateral direction under the tip of the topmost sheet pile D, and the fixed claw piece 19 and the movable claw piece 20 move the sheet pile D.
Grasp the tip of the When the chuck 18 grasps the sheet pile D, the vibro device C is lifted up by operating the bendable main arm B, and the sheet pile D is moved to the second position.
As shown in the figure, the sheet pile D is made to stand vertically at the expected driving position, and further rotated so that the sheet pile D faces a predetermined position. In addition, as the positioning device 70 lifts the sheet pile D upward, the roller 81 and the receiving member 72 are naturally disengaged due to the weight of the sheet pile D, and the vibro device C is free with respect to the second auxiliary arm 50. It is designed so that it can be rotated. Next, when the hydraulic motor 6 is driven, the exciter 5 generates vibrations in the vertical direction, and the vibration drives the sheet pile D into the ground.At this time, the tip of the bendable main arm B By pressing downward, the sheet pile D will be promoted to enter the ground. In addition, when the tip of the foldable main arm descends as the sheet pile D approaches, the tip of the foldable main arm B descends in an arcuate trajectory. The distance between the vibro device C in the front and back direction changes and an external force acts on the vibro device C to cause the vibro device C to fall forward, but in the illustrated embodiment, the tip of the bendable main arm B Since the first auxiliary arm 3 and the second auxiliary arm 50, which are bendable in the bending direction of the bendable main arm B, are interposed between the vibro device C and the vibro device C, the first auxiliary arm 3 and the second auxiliary arm 50 are By tilting the arm 50, the external force can be released. Therefore, the vibro device C always maintains an attitude perpendicular to the ground L, and does not apply unnatural force to the sheet pile D and the bendable main arm B.

Also, when pulling out the sheet pile D that has been driven into the ground,
It can be easily pulled out by bending the bendable main arm B, gripping the tip of the sheet pile D by the chuck 18, and raising the bendable main arm B while vibrating the exciter 5. Furthermore, the pulled-out sheet piles D can be stacked and organized one after another without any manual intervention.

Next, to explain the effects of the present invention, according to the vibrating pile driving and pile extracting machine of the present invention, the tip of the foldable main arm of a power shovel or the like and the vibro device having the exciter and the chuck can be folded together. Since it is connected via the bendable first and second auxiliary arms, the tip of the bendable main arm draws an arcuate trajectory as the sheet pile or pile is inserted into or pulled out of the ground. Even when moving vertically, there is no unnatural load acting on the bendable main arm or vibro device, and as a result, the verticality of the driven sheet pile or pile is good, and the vibrating pile It has practical effects such as being able to alleviate the stress generated in each part of the pile driving and extracting machine.

[Brief explanation of the drawing]

Fig. 1 is an external view of a conventional vibrating pile driving and extracting machine, Fig. 2 is an external view of a vibrating pile driving and extracting machine according to an embodiment of the present invention, and Fig. 3 is an external view of the vibrating pile driving and extracting machine of Fig. 2. 4 is a perspective view of the main part, FIG. 4 is a view taken in the direction of the − arrow in FIG. 3, FIG. 5 is a cross-sectional view of FIG. 4, FIG. An explanatory diagram of the structure of the exciter shown,
FIGS. 8 and 9 are explanatory diagrams of the use state of the vibrating pile driving and pile extracting machine shown in FIG. 2. 3...First auxiliary arm, 5...Exciter, 6...
Hydraulic motor, 18...chuck, 50...second auxiliary arm, A...power shovel body, B...bending main arm, C...vibro device, D...sheet pile.

Claims (1)

[Claims] 1 Hydraulic expansion and contraction device G at the tip of the bendable main arm B
A first auxiliary arm 3, which can be raised and lowered freely, is pivotally connected to the first auxiliary arm 3, and second auxiliary arms 50, 50 that hang down in the vertical direction are pivotally connected to the first auxiliary arm 3. A vibro device C having a vibration exciter 5 powered by a hydraulic motor 6 and a chuck 18 for grasping piles or missing plates is pivotally mounted to the two auxiliary arms 50, 50 so as to be tiltable in the vertical direction. A vibrating pile driving and extracting machine.