JPH0626576Y2 - Machinery for foundation work - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is for foundation work that uses a long leader that is held upright on a self-propelled vehicle body to perform work such as excavation of the ground and pile driving. Machine related.

(Prior Art and Problems Thereof) In this type of conventional foundation construction machine, generally, a machine body with a cockpit is rotatably arranged on a self-propelled vehicle body, and a lifting member such as a hoga machine is attached to the machine body. A leader that supports the vertical movement is directly connected, and when excavating or changing the pile driving position, the leader can be moved in an upright state during work by turning the machine body.

However, in the above-mentioned turning, the leader is turned around the turning center of the machine body, and when the turning radius is large and the work is performed near the obstacle of the building, the leader is turned. Since the leader collided with an obstacle, the leader could not be turned, and it was difficult to excavate, pile, and so on at the work site where the leader overflowed.

Further, in this type of foundation work, while the normal work requires that the leader be held vertically regardless of the slope or unevenness of the ground surface, there are cases where oblique hole excavation or diagonal pile driving is required. Therefore, as the above-mentioned foundation construction machine,
It is required to have a function capable of handling these tasks.

(Purpose of the Invention) In view of the above-mentioned circumstances, the present invention has a small turning radius of the leader, and can adjust the leader holding posture according to the state of the ground surface or the work form, and further, the holding strength and stability of the leader. It is an object of the present invention to provide a foundation construction machine which is excellent in structure and structurally simple.

(Means for Solving Problems) In order to solve the above-mentioned conventional problems, the foundation construction machine according to the present invention is located in front of a turning center of a machine body 3 rotatably arranged on a self-propelled vehicle body 2. A swivel base 5 having a cylindrical swivel shaft portion 5b having an internal gear 18 on its inner surface is rotatably fitted in a horizontal position in a horizontal plane, and a pinion 20 meshing with the internal gear 5b is rotationally driven. A drive motor 19 is fixed, and a swing base 8 is swingably supported on the swivel base 5 via a horizontal shaft 7. The swing base 8 has an auger at a position on one end side of the horizontal shaft 7. A leader 11 for supporting an elevating member 10 of a machine or the like is connected at a lower portion so as to be capable of being depressed, and a leader depression cylinder device 12 is interposed between the other end of the horizontal shaft 7 and the leader 11. And between the swivel base 5 and both positions of the swing base 8 with the horizontal shaft 7 interposed therebetween. In this configuration, swing cylinder devices 6 and 6 are respectively interposed.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Fig. 4 ~
FIG. 7 is an overall view of a machine for foundation work such as an excavator or a pile driver. The machine is a self-propelled vehicle 2 having an endless track 1 such as a caterpillar, and is freely rotatable on the self-propelled vehicle 2. A machine main body 3 that is a crane main body that is disposed, and a swivel base 5 that is rotatably fitted on a support base 4 that projects forward from the machine main body 3.
And a swing base 8 pivotally supported on the swivel base 5 via a horizontal shaft 7, and between the swivel base 5 and both positions of the swing base 8 sandwiching the horizontal shaft 7. A pair of rocking cylinder devices 6 and 6 mounted thereon, a pair of connecting frames 9 and 9 fixed in parallel on the rocking base 8 in the same direction as the horizontal shaft 7, and one end portions of the two connecting frames 9. A leader 11 for supporting an elevating member 10 such as an auger machine that is freely restrained and coupled at the bottom, and a leader restraint cylinder device 1 interposed between the other end of both coupling frames 9 and the leader 11.
2 and. Reference numeral 13 is a shoe arranged at the lower end of the leader 11 and is raised and lowered by a jack device built in the leader 11.

As shown in FIGS. 1 to 3, the swivel base 5 includes a bearing 1
Circular swivel body 5 mounted on the support 4 via
a and a cylindrical swivel shaft portion 5b projecting from the lower surface of the swivel base body 5a through a circular through hole 16 provided in the support base 4, and the internal gear 18 is provided on the inner surface of the swivel shaft portion 5b. The internal gear 18 is engaged with the pinion 20 which is rotationally driven by a drive motor 19 which is a turning drive device arranged on the support 4.

The swing base 8 is formed in a rectangular shape in a plan view, and a horizontal shaft 7 is rotatably fitted in a front-rear direction in a boss portion 21 provided in a central portion of a lower surface of the swing base 8. It is supported by the front and rear bearings 22 that are installed. In particular, as shown in FIG. 2, a pair of rocking cylinder devices 6, 6 sandwiching the horizontal shaft 7 on the left and right sides of the horizontal shaft 7 and a bracket 23 projecting from the swivel base 5,
Brackets 2 protruding from left and right connections 9, 9 of the rocking base 8
It is pivotally connected to 4.

The leader 11 is configured to be able to be depressed with a support shaft 26 connecting the bracket 25 fixed to the leader 11 and the connection frame 9 as a fulcrum.

In the above-mentioned configuration, the state shown in FIG. 4 is a working state of foundation work, in which the auger screw and the casing are attached to the elevating member 10 for excavation work, and the elevating member 10
The stake is attached to the pile and the work for driving the pile is performed. When the ground surface of the work site is inclined and the leader 11 is not upright with respect to the horizontal plane, the piston rods of the rocking cylinder devices 6 and 6 are appropriately expanded and contracted, and as a result, FIG. As shown by A and B, the uprightness may be corrected by tilting the reader 11 left and right with the horizontal axis 7 as a fulcrum. Further, also in the case of excavation of an oblique hole and driving of an oblique pile, the leader 11 may be tilted by the rocking cylinder devices 6 and 6.

Next, when turning the leader 11 for excavation and changing the pile driving position, as shown in the phantom line in FIG.
Drive the motor 1 after moving it away from the ground.
By operating 9 the pinion 20 and the internal gear 1
The swivel base 5 may be swung via the 8. At this time, since the reader 10 turns around the turning center O ₁ of the turning base 5 and does not need to turn the machine body 3 around the turning center O ₂ , as shown in FIG. If the machine body 3 is swung in a narrow work site with an obstacle 30, even if the machine body 3 collides with the obstacle 30, the reader 10 alone can be swung without turning the machine body 3. . Further, since the turning radius R ₁ of the leader 10 is shorter than the turning radius from the machine body 3, the leader 10 can be prevented from colliding with an obstacle from this point as well.

When the leader 11 is folded from the solid line in FIG. 4 to the horizontal state, as shown in the phantom line in FIG.
3 is lifted to be separated from the ground, and then the leader depression suppressing cylinder device 12 is contracted to operate the leader 1.
1 can be rotated rearward about the support shaft 26 and folded from the inclined state shown in FIG. 5 to the horizontal state shown in FIG.

(Effect of the Invention) According to the foundation work machine of the present invention, since the turning center of the lifting / lowering member supporting leader is located in front of the turning center of the machine body, when the machine body is turned, it collides with an obstacle. Even in such a narrow work site, it is possible to rotate only the leader without rotating the machine body so as not to collide with an obstacle.

Further, the foundation construction machine of the present invention is provided with a swivel base having a swivel center in front of the swivel center of the machine body as described above, and on the swivel base, right and left around the horizontal axis by the swing drive device. Since a swingable platform is provided, and the leader is connected to the swingable platform so that it can be held down, the ground surface at the work site is inclined and the leader is not upright with respect to the horizontal. In this case, the uprightness of the leader can be easily corrected by the swing drive device, and the oblique hole excavation and the oblique pile driving work can be easily performed.

Particularly, according to the present invention, the swivel base is directly fitted to the machine body in the cylindrical swivel shaft portion, and the swivel is performed by the rotational drive of the pinion meshing with the internal gear on the inner surface of the swivel shaft portion. Since the swivel drive unit is housed in the lower inner region of the swivel base, a large installation space is not required, and thus the swivel shaft can be made large in diameter to greatly improve the holding strength and stability of the swivel base with respect to the machine body. In addition, since the leader for supporting the elevating member and the cylinder device for suppressing the leader depression are both attached to the rocking base 8 and rock integrally, the rocking base is connected to the leader and the cylinder device and the rocking base. Even if it is tilted and displaced, it is not twisted, so that it can be connected in a rattling manner by an extremely simple structure in which it is pivotally attached via a pin. Further, if the rocking base is simply rocked, only one rocking cylinder is enough. However, in the present invention, since the cylinder device is interposed on both sides of the horizontal axis, the tilting degree once required. The rocking base set to 1 can be firmly held so as not to rock with respect to the revolving base 5 by the stopper action of the cylinder devices on both sides. As described above, according to the present invention, the holding strength and stability of the swivel base with respect to the machine body, the holding strength of the swing base 8 with respect to the swivel base, and the stability of the connecting portion of the leader and the depression suppressing cylinder device with respect to the swing base. It is excellent in both of them, and thus the holding strength and stability of the leader for carrying out excavation or pile driving while holding the heavy and long elevating member supporting leader in the upright state are sufficiently ensured. In addition to being able to perform work reliably and safely,
Since the entire structure of these components is very simple, there are advantages that the operation reliability is high, the manufacture is easy, and the cost is low.

[Brief description of drawings]

The drawing shows one embodiment of the present invention. Fig. 1 is a longitudinal sectional view of a main part of a machine for foundation construction, Fig. 2 is a view taken along the line II-II of Fig. 1,
FIG. 3 is an exploded perspective view of the main part, FIGS. 4 to 6 are overall side views of the machine showing a depressed state of the reader, and FIG. 7 is a view taken along the line VII-VII of FIG. . 2 ... Self-propelled vehicle body, 3 ... Machine body, 5 ... Revolving base, 5a ... Cylindrical revolving shaft part, 6 ... Oscillating cylinder device, 7 ... Horizontal shaft, 8
... the oscillating table, 10 ... elevating member, 11 ... reader, 12 ... reader俯抑cylinder unit, 18 ... inner teeth gear, 19 ... motor, 20 ... pinion, O 2 _... turning center of the machine body, O
₁ ... Center of rotation of the leader.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-59-138624 (JP, A) JP-A-61-92224 (JP, A) JP-A-60-144417 (JP, A) JP-A-60- 144418 (JP, A) JP-A-49-52403 (JP, A) JP-A-62-72828 (JP, A) JP-A-52-62910 (JP, A) JP-A-61-286415 (JP, A) Practical Showa 51-3205 (JP, U) Japanese Patent Sho 51-10403 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A swivel base having a cylindrical swivel shaft portion having an internal gear on its inner surface is rotatable in a horizontal plane at a position in front of a swivel center of a machine body rotatably mounted on a self-propelled vehicle body. A drive motor for rotating and driving a pinion meshing with the internal gear is fixed, and a swing base is swingably supported on the swivel base via a horizontal shaft. A reader for supporting an elevating member such as an auger machine is connected to the base at one end side position of the horizontal shaft so as to be capable of being restrained in the lower part, and the leader restraint is provided between the other end side position of the horizontal shaft and the reader. A machine for basic construction in which a cylinder device is interposed and a rocking cylinder device is interposed between each of the positions on both sides of the horizontal axis of the rocking base and the revolving base.