JP5898144B2 - Pile driver - Google Patents

Description

  The present invention relates to a pile driving machine for driving a pile body such as a foundation pile of a structure into the ground.

  As a pile driving machine, for example, as shown in Patent Literature 1 and Non-Patent Literature 1, a self-propelled carriage for a pile driving operation using an earth auger is provided with a back stay and a supporting arm, and the leader is provided with the back stay and the supporting arm. A vertical auger is installed on the leader so that it can be moved up and down (see FIG. 1 of Patent Document 1 and FIG. A.4.1 of Non-Patent Document 1), or attached to the tip of the boom of the self-propelled carriage. There is a configuration in which an earth auger is directly provided via a jig (rotating shaft or the like) (see FIG. A4.2 and FIG. A4.3 of Non-Patent Document 1).

  In the pile driving work, an auger screw having a drilling blade is attached to the lower end of the earth auger, and the ground is excavated by rotating the auger screw around the axis with the earth auger. Then, when continuing deeper excavation, the auger screw is further added to the upper end of the auger screw and the excavation is continued. When excavation is completed to the specified depth, the auger screw is removed from the ground, and concrete is placed in the excavated hole, or a pile body prepared in advance is inserted into the hole, and then piled on the ground. Is assumed to be inserted.

Japanese Patent Laid-Open No. 11-303078

Japanese Industrial Standard JISA 8509-2

  As the above pile driver, usually a dedicated self-propelled carriage for pile driving work using an earth auger is used, but since this self-propelled carriage has many auxiliary devices such as a backstay and a support arm, it is versatile. Is difficult to divert to other work. In addition, a large self-propelled carriage is often used to stably support the auger screw, and there is a problem that it is difficult to work in a narrow work site.

  In order to solve this problem, a crane car (building pillar car) used for building pole work such as a telephone pole may be used. This construction column car is not equipped with auxiliary equipment such as a backstay and is highly versatile. In addition, it is often smaller than a self-propelled carriage for pile driving using an earth auger, and it is a narrow work site. This is because high workability can be secured. However, this pillar car is not made so robust that it can withstand pile driving work using an earth auger in the first place, and the hanging jig at the tip of the boom (for example, a rotating shaft) and the boom are turned horizontally during the work. When an excessive load acts on the swivel base, there is a problem that the function deterioration of the hanging jig and the swivel base easily proceeds.

  Therefore, an object of the present invention is to prevent an excessive load from acting on the hanging jig and the swivel base during a pile driving operation using an earth auger.

In order to solve the above-described problems, the present invention provides a suspension jig suspended from a first rotation shaft provided at the tip of a boom of a carriage and having a connecting portion formed at a lower end thereof, and the first rotation shaft. And a side plate having a surface normal perpendicular to the second rotation axis and a side plate having a plane normal parallel to the second rotation axis via a second rotation shaft provided non-parallel A side plate having a surface normal perpendicular to the second rotation axis suspended from the box-shaped connecting portion and suspending the earth auger on the lower end side; and a side plate having a parallel surface normal The pile driving machine provided with the box-shaped intermediate member which consists of.

  Thus, even if the auger screw is tilted to some extent during work, the tilt is absorbed by both pivot shafts, and the tilt becomes boom. Can be prevented from being transmitted directly to. For this reason, it is possible to prevent an excessive load from acting on the boom and the swivel base, and it is possible to prevent functional deterioration of the hanging jig and the swivel base at the tip of the boom.

  In the said structure, it is preferable to further provide the buffer member interposed in the said hanging jig and the said intermediate member.

  In this way, when the hanging jig and the intermediate member are rotated relative to each other by the second rotation shaft, the hanging jig and the intermediate member are in direct contact with each other to prevent noise and vibration from being generated. can do. For this reason, for example, in a densely populated area, work can be carried out with little influence on neighboring residents. The buffer member can be appropriately selected from various materials such as a foaming resin such as sponge and a spring.

  The present invention relates to a pile driving machine including an earth auger, and a first rotation shaft of a hanging jig suspended from the tip of a boom of a carriage and a second rotation of an intermediate member suspended from the hanging jig. The rotational directions of both rotational shafts of the shaft were made non-parallel. In this way, even if the auger screw of the earth auger tilts in any direction from the vertical direction, the tilt is absorbed by both rotating shafts, and an excessive load acts on the boom and swivel. Can be prevented. For this reason, it is possible to prevent functional deterioration of the hanging jig at the tip of the boom and the swivel base.

Front view showing a first embodiment of a pile driving machine according to the present invention The principal part of the pile driving machine which concerns on 1st embodiment is shown, (a) is a perspective view, (b) is sectional drawing which follows the bb line in (a). The principal part of the pile driving machine which concerns on 1st embodiment is shown, (a) is a side view, (b) is a front view. The principal part of 2nd embodiment of the pile driving machine which concerns on this invention is shown, (a) is a perspective view, (b) is sectional drawing which follows the bb line in (a). The fragmentary sectional view seen from the side which shows the principal part of 3rd embodiment of the pile driving machine which concerns on this invention

  1 to 3 show a first embodiment of a pile driving machine according to the present invention. This pile driving machine is suspended from a first rotating shaft 3 provided at the tip of a boom 2 of a carriage 1 (building pillar car), and a hanging jig 5 having a connecting portion 4 formed at the lower end thereof, and a first The rotating shaft 3 includes an intermediate member 8 that is suspended from the connecting portion 4 via a second rotating shaft 6 provided at a twist position of 90 degrees, and that suspends the earth auger 7 on the lower end side. . An auger screw 10 having an excavating blade 9 at the tip is attached to the earth auger 7.

  The car body of the cart 1 is provided with a swivel base 11 that turns horizontally, and the boom 2 is attached to the swivel base 11. A cart 1 of the type shown in FIG. 1 is mainly used for construction of utility poles, is not equipped with an auxiliary device such as a backstay, is highly versatile, and for pile driving work using an earth auger 7 Compared to other self-propelled carts, they are often small in size, and have a feature that high workability can be secured in a narrow work site.

  The first rotating shaft 3 has a rotating shaft that is perpendicular to the plane including the locus of the boom 2 when the boom 2 is moved up and down. The upper part of the hanging jig 5 suspended from the first rotating shaft 3 has a triangular shape whose width becomes narrower toward the top. By adopting such a triangular shape, the boom 2 and the hanging jig 5 are prevented from interfering as much as possible when the boom 2 is set in a nearly vertical state.

  A buffer member 12 (sponge) is interposed in a gap between the outer wall of the connecting portion 4 of the hanging jig 5 and the inner wall of the intermediate member 8 that holds the connecting portion 4 in a state where it is stored. (See FIG. 2 (b)). By providing the buffer member 12 in this way, the suspension jig 5 and the intermediate member 8 are prevented from directly contacting each other when the suspension jig 5 and the intermediate member 8 are rotated via the second rotation shaft 6. For this reason, it can prevent that noise arises due to both contacting. When the suspension jig 5 and the intermediate member 8 are relatively rotated, the buffer member 12 is deformed, so that the rotation is not hindered.

  In the pile driving operation, the auger screw 10 connected to the earth auger 7 is rotated around the axis, and the ground G is excavated by the excavating blade 9 at the tip of the auger screw 10. When it is necessary to excavate the ground G deeper than the length of one auger screw 10, the auger screw 10 is newly connected to the upper end of the auger screw 10 screwed into the ground G. At this time, even if the auger screw 10 screwed into the ground G is slightly inclined from the vertical direction, the auger screw 10 to be connected by the first rotation shaft 3 and the second rotation shaft 6 is connected at a predetermined angle. It can be tilted within the range (see FIGS. 3A and 3B). For this reason, the auger screws 10 can be easily connected to each other.

  Furthermore, in the extraction operation of the auger screw 10 that is inclined and screwed into the ground G, the earth auger 7 can be inclined by the first rotation shaft 3 and the second rotation shaft 6 so as to match the inclination angle. . For this reason, the auger screw 10 can be smoothly attached to the earth auger 7 and the auger screw 10 can be removed from the ground G.

  Moreover, when a pile driving operation is performed in a narrow site, the position of the pile driving becomes near the wall of an adjacent building, and this wall and the tip of the boom 2 of the pile driving machine may interfere with each other. Even in this case, the first rotating shaft 3 and the second rotating shaft 6 can maintain the vertical state of the auger screw 10 while separating the boom 2 from the wall so that the tip of the boom 2 does not interfere with the wall. Therefore, the pile driving work near the wall can be performed smoothly.

  As described above, by providing the two rotating shafts of the first rotating shaft 3 and the second rotating shaft 6 between the tip of the boom 2 and the intermediate member 8, the intermediate member 8 with respect to the boom 2 is provided. Can be inclined in any direction within a predetermined angle range. For this reason, compared with the case where earth auger 7 grade | etc., Can only be rotated with respect to the boom 2 only in one specific direction (for example, the rotation direction of the 1st rotation axis | shaft 3 in this embodiment), a hanging jig. 5 (first rotating shaft 3) and the force applied to the swivel base 11 can be reduced as much as possible, and the life of the hanging jig 5 and the swivel base 11 can be ensured.

  When attaching the earth auger 7 to the intermediate member 8, temporarily place the earth auger 7 on the earth auger holder placed on the ground G, and after aligning the axis of the earth auger 7 and the axis of the intermediate member 8, The earth auger 7 is inserted into the intermediate member 8. As in the configuration of the present invention, by allowing the intermediate member 8 to be inclined in any direction by the first rotating shaft 3 and the second rotating shaft 6, both axes can be easily aligned. . For this reason, attachment of the earth auger 7 to the intermediate member 8 can be smoothly advanced. In addition, since the ground auger 7 is removed from the ground auger holder after the intermediate member 8 and the ground auger 7 are connected in a state where the shafts are aligned, the removal can be performed smoothly. For this reason, at the time of this removal, the ground auger holder does not move carelessly due to the reaction, and the work can be performed safely.

  The principal part of 2nd embodiment of the pile driving machine which concerns on this invention is shown in FIG. In the first embodiment, the connecting member 4 formed at the lower end of the hanging jig 5 is provided so as to cover the intermediate member 8. However, in the present embodiment, the lower end of the hanging jig 5 is provided at the lower end. The difference is that the intermediate member 8 is provided in the formed connecting portion 4. Thus, even if the receiving and inserting relationship between the connecting portion 4 and the intermediate member 8 is reversed, the rotation function by the second rotation shaft 6 is exhibited without any problem.

  The principal part of 3rd embodiment of the pile driving machine which concerns on this invention is shown in FIG. In this embodiment, the connecting portion 4 formed at the lower end of the hanging jig 5 and the intermediate member 8 are provided with bulging portions 13 a and 13 b bulging outward along the rotation direction of the second rotation shaft 6. Forming. By thus forming the bulging portions 13a and 13b, the second rotation shaft 6 can be rotated more smoothly.

  The pile driving machine shown in each of the above embodiments is merely an example, and an excessive load is prevented from acting on the hanging jig 5 and the swivel base 11 during the pile driving operation using the earth auger 7. As long as the problem of the present invention can be solved, each configuration such as the relative angle between the first rotating shaft 3 and the second rotating shaft 6 and the shapes of the hanging jig 5 and the intermediate member 8 can be appropriately changed. . Moreover, in each said embodiment, although illustrated about the structure using the buffer member 12, it is also permitted to set it as the aspect which does not use this buffer member 12. FIG.

DESCRIPTION OF SYMBOLS 1 Bogie 2 Boom 3 1st rotating shaft 4 Connecting part 5 Hanging jig 6 Second rotating shaft 7 Earth auger 8 Intermediate member 9 Excavating blade 10 Auger screw 11 Swivel table 12 Buffer members 13a, 13b Swelling part G Ground

Claims (2)

A first rotation shaft that is provided at the tip of the boom (2) of the carriage (1) and has a rotation shaft that is perpendicular to the plane including the locus of the boom (2) when the boom (2) is moved up and down. A suspension jig (5) suspended at (3) and having a connecting portion (4) formed at the lower end;
The first rotating shaft (3) is suspended from the connecting portion (4) via a second rotating shaft (6) provided at a twist position of 90 degrees, and an earth auger (7) is provided at the lower end side. A box-shaped intermediate member (8) comprising a side plate having a surface normal perpendicular to the second pivot shaft (6) and a side plate having a parallel surface normal ;
The box-shaped connecting part (4) comprising a side plate having a surface normal perpendicular to the second rotation shaft (6) and a side plate having a surface normal parallel to the second rotation shaft (6) A pile provided so as to cover the intermediate member (8), or provided with the intermediate member (8) in the connecting portion (4) so that the auger screw (10) is inclined within a predetermined angle range. Hammering machine.   The pile driving machine according to claim 1, further comprising a buffer member (12) interposed between the suspension jig (5) and the intermediate member (8).

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