JPH0211460Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a leader support device for a pile driver equipped with a rotary leader.

[Conventional technology]

A leader support device for this type of pile driving machine equipped with a rotary leader is shown in FIGS. 7 to 10, and this leader support device will be described below with reference to the drawings.

The main leader 1 consists of an upper rotary leader 2 and a lower fixed leader 3 connected to the lower end of the upper rotary leader 2 by inserting a rotary shaft 3a therein. A sub-leader 6 is formed longer than the distance between the guide gibs 5, 5 by the guide gibs 5, 5 provided on the movably provided holder portion 4 and the lower fixed leader 3, respectively.
It is attached to a sliding guide 6a so as to be movable in the vertical direction.

Further, the sub-leader 6 has its lower part pivotally supported by link mechanisms 9, 9 (one not shown) disposed at the front of the pile driver main body 8 through brackets 7, 7 provided on both sides. The upper part is supported by two undulating cylinders 10, 10 (one not shown) whose base ends are supported on both sides of the pile driver main body 8.

Furthermore, between the main reader 1 and the sub-reader 6,
A hydraulic cylinder 11 that moves the main leader 1 in the vertical direction has one end 11a attached to the upper part of the sub-leader 6 and the other end 11b attached to the lower fixed leader 3 of the main leader 1.
The guides 12, 12 of the front attachment are provided on the front surface of the upper rotary leader 2 of the main leader 1 and on one side in a direction perpendicular to the front surface, and the guides 12, 12 are provided on the lower fixed leader. 3 is provided with a guide 13 for a front attachment only on the front side.

The main leader 1 is a levitating cylinder 1
By the expansion and contraction of the brackets 1 and 11, the brackets 7 and 7 can be raised and lowered together with the sub-leader 6 using the brackets 7 and 7 as fulcrums, and can be moved upward or downward by being guided by the sliding guide 6a of the sub-leader 6 by the expansion and contraction of the hydraulic cylinder 11. A reader supporting device having such a configuration has been common in the past.

[Problem that the invention attempts to solve]

Therefore, in this type of conventional leader support device, in order to allow the main reader 1 to move vertically while being guided by the sliding guide 6a of the sub-leader 6, the length of the sub-leader 6 is adjusted to the length of the main leader 1. It is necessary to make the slide guide 6a longer by the amount of movement, and there is a limit to the length of the sliding guide 6a in the portion of the sub-leader 6 that is below the bracket 7, so when the main leader 1 is laid down during transportation etc. The amount of forward movement of the main leader 1 is restricted, and when the main leader 1 is long, the rear side of the pile driver main body 8 becomes heavier than the front side, making it unbalanced and unstable. It was hot.

In addition, since the lower end of the main leader 1 is fixed unrotatably by the lower fixed leader 3, excavation work can be carried out using a multi-axis auger (not shown) etc. attached to the guides 12, 12 of the front attachment. Sometimes, the upper rotary leader 2 is rotated left and right in order to excavate a position that is left and right from the front of the pile driver main body 8. In this case, the guide 12 of the upper rotary leader 2 is attached to the lower fixed leader 3. There was a problem in that the driving part of the multi-shaft auger remained at a high level because it came off the guide 13 and was not continuous, and the depth that could be excavated became shallow.

The present invention was developed in consideration of the above points, and it is possible to shorten the length of the sub-leader, and even if the main leader is long, it can be laid down and transported in a stable state, and it can be positioned away from the front of the excavating machine body. The purpose of the present invention is to provide a leader support device that does not allow a multi-shaft auger to remain at a high level even during excavation work.

[Means for solving problems]

As a means for solving the above-mentioned problems, the present invention provides a pile driving machine in which a rotary main leader equipped with front attachment guides on two sides can be raised and lowered via a sub-leader. Holder parts are provided at two locations, upper and lower, to rotatably support the main leader. Each of the undulating cylinders is pivotally supported at the tip of the main body, and guide gibs are provided at the upper and lower parts of the sub-leader corresponding to both the holder parts of the main leader, and the upper and lower holder parts of both the holder parts and the holder part of the main leader are provided. A guide member for guiding the movement of the guide gib is provided in each section in a continuous manner, and a leader rotation device is provided on either one of the two holder sections, and one of the two holder sections and the sub-leader are provided with a leader rotation device. It is characterized by being connected via a hydraulic cylinder.

[Effect]

With this configuration, the drive device such as a multi-shaft auger can be lowered to the bottom of the main leader even during excavation work at a position away from the front of the pile driver to the left and right, and it is also possible to lower the drive device such as a multi-shaft auger to the bottom of the main leader. In this case, the main leader can be stabilized by moving it back and forth to a balanced position.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

The pile driving machine main body 20 has an upper revolving body 21 having a driver's cab at the front and a balance weight at the rear.
and a traveling device 22 provided with a crawler disposed below and driven by a hydraulic motor or the like, and a leader support base 23 is provided on the upper revolving body 21 so as to protrude forward.

Further, the cylindrical main leader 24 includes an upper holder part 24a and a lower holder part 24b for rotatably supporting the main leader 24 at two vertically spaced locations, and the main leader 24 has a multi-axis Two sets of guides 25, 25, each consisting of two parallel pipes, are provided in the upper part of the upper part for guiding the vertical movement of a front attachment (not shown) such as an auger drive device, a Kerry bar drive device, or a drop hammer. It is fixed in a floating state from the outer surface of the main leader 24 via a stay 25a at a position other than the holder part 24a and the lower holder part 24b, and both the holder parts 24a, 24b of both guides 25, 25 are fixed. Removable joint guide 2 on the straddling part
5b and 25b are provided, and are disposed over the entire length on two surfaces, the front surface of the main leader 24 and one side surface at 90 degrees with respect to the front surface.

Moreover, the main reader 2 is attached to the lower holder portion 24b.
A rotation device 26 such as a hydraulic motor for rotating the main leader 24 is provided, and output shafts 26a, 26a extending upward and downward of the rotation device 26 are connected to the rotation device 26 provided on the main leader 24 side, respectively. Plate 24c, 24c
and are combined by serration.

The upper holder portion 2 is attached to the upper and lower ends of the rectangular cylindrical sub-leader 27 on the rear surface of the main leader 24.
A sliding guide 28 is provided continuously from the lower end of the main leader 24 to above the upper holder part 24a.

Guide gibs 27a, 27 are attached to this sliding guide 28.
the sub-leader 27 which is slidably engaged with a;
is rotatably supported at its lower end by the leader support stand 23 of the pile driver main body 20 via link mechanisms 29, 29 (one not shown) at the brackets 27b, 27b, and its upper end is pivotally supported by the leader support base 23 of the pile driver main body 20 at the brackets 27b, It is pivotally supported by two undulating cylinders 30, 30 (one not shown) whose base ends are pivotally supported on both sides of the leader support base 23.

Further, between the main leader 24 and the sub-leader 27, a sliding cylinder 31 has one end attached to a bracket 27c provided on the upper part of the sub-leader 27, and the other end attached to a bracket 24d provided on the lower holder portion 24b of the main leader 24. They are each supported on a shaft.

The main leader 24 is the undulating cylinder 3
By expanding and contracting 0 and 30, the sub-leader 27
The guide gib 27 of the sub-leader 27 is driven to rise and fall integrally with the sub-leader 27 using the lower end brackets 27b, 27b as fulcrums, and moves downward by extending the sliding cylinder 31 and upward by shortening the sliding cylinder 31.
a, 27a, and is guided by a sliding guide 28 that is engaged with 27a to enable vertical movement.

By providing the sliding guide 28 on the main leader 24 side as a support device for the main leader 24 as described above, the length of the sub-leader 27 can be adjusted in the vertical direction of the main leader 24 as in the case of a conventional support device. There is no need to make the main leader 24 longer for the movement, and the main leader 24 can be slid in the vertical direction as long as it is long enough to connect both the upper and lower guide gibs 27a, 27a corresponding to the upper and lower holder parts 24a and 24b. It is designed so that it can be raised and lowered at the same time.

In addition, since the sliding guide 28 is provided on the side of the main leader 24 when it is laid down during transportation, etc., the distance by which the main leader 24 can be slid forward (downward when standing) is limited to that of the sub-leader 27. Even if the main leader 24 is long, the main leader 24 can be slid to a position where it can be balanced when it is supported on the pile driver main body 20. It is set as.

Furthermore, the main leader 24 is rotatably supported at two locations, the upper and lower holder parts 24a and 24b, so that the guide of the front attachment is always continuous over the entire length, so that multi-axis When using an auger or the like to excavate a position left or right away from the front of the pile driver main body 20, the auger drive device does not stay at a high level.

[Effect of idea]

As explained above, the leader support device for a pile driver according to the present invention has holder parts provided at two locations above and below the main leader, the lower part of the sub-leader is used as the support base of the main body of the pile driver, and the upper part is used as the tip of the undulating cylinder. The sub-leader is provided with a guide gib corresponding to each of the holder parts of the main leader, and guide members for the guide gib are connected to both the holder parts and the upper and lower parts of the holder part of the main leader. At the same time, a leader rotating device is provided on either one of the two holder parts, and one of the two holder parts and the sub-leader are connected via a hydraulic cylinder, so that the main leader is connected to the sub-leader. Since the sub-leader can be slid, the length of the sub-leader can be shortened compared to conventional leader support devices, and the range of vertical sliding of the main leader relative to the sub-leader (sliding in the front-back direction when falling down) can be reduced. A sufficient distance can be secured without being limited by the length of the sub-leader, and even a long leader can be transported in a stable state.

In addition, when excavating at a position away from the front of the pile driver to the left or right, the auger drive device etc. can be lowered to the lower end of the leader, making effective use of the entire length of the auger etc. to dig a sufficient depth. It has the effect of making cutting work possible.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the present invention. Figure 1 is a side view showing the entire leader support device of a pile driver, and Figure 2 is a main view showing the lower holder part of the main leader. 3 is a cross-sectional view of Figure 1, Figure 4 is a cross-sectional view of Figure 1, Figure 5 is a cross-sectional view of Figure 1, and Figure 6 is a cross-sectional view of the pile driver. The side views, FIGS. 7 to 10, show an example of a conventional leader support device for a pile driver.
Figure 7 is a side view showing the entire pile driver, Figure 8 is a cross-sectional view of Figure 7, Figure 9 is a cross-sectional view of Figure 7, and Figure 10 is a cross-sectional view of Figure 7. be. 20...Piling machine main body, 23...Leader support stand,
24...Main leader, 24a...Upper holder part, 2
4b...Lower holder part, 24d...Bracket,
25... Guide, 26... Rotating device, 26a...
Output shaft, 27...Sub-leader, 27a...Guide gib, 28...Sliding guide, 30...Luffing cylinder, 31...Sliding cylinder.

Claims (1)

[Scope of utility model registration request] In a pile driving machine in which a rotary main leader equipped with front attachment guides on two sides can be raised and lowered via a sub-leader, the main leader is rotatably supported at two locations above and below the main leader. The sub-leader has a lower part supported on a support base provided at the front of the pile driver main body, and an upper part of the sub-leader supported on the tip of an undulating cylinder whose base end is supported pivotally on the pile driver main body. Guide gibs are provided at the upper and lower parts of the sub-leader in correspondence with the two holder parts of the main leader, respectively, and guide members for guiding the movement of the guide gibs are provided in both the holder parts and the upper and lower parts of the holder part of the main leader. The pile is characterized in that a leader rotation device is disposed on either one of the two holder parts, and one of the two holder parts and the sub-leader are connected via a hydraulic cylinder. Leader support device for beating machine.