JPH0692656B2 - Machinery for foundation work - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to foundation work such as ground excavation, driving of piles or sheet piles or press-fitting by an elevating member attached to a guide column supported by a self-propelled crane body. Related to machines that perform

(Prior art and its problems) As a machine for this type of foundation work, a guide pillar of an elevating member such as an auger machine for mounting an auger screw for excavating the ground or a hammer for pile driving is supported by a supporting rod such as a backstay or a boom. It is known that the crane body is mounted on a self-propelled crane main body so that it can be switched between an upright posture and a horizontal posture, and that the crane main body can be moved with a horizontal guide rod installed (Actual No. Sho 58-176188, special feature). Kaisho 61-106888, same
62-68997, Japanese Patent Publication No. 61-47276, etc.).

However, since these conventional foundation construction machines are carried on a trailer when they are transported to their destinations, there is a drawback that the total length of the guide columns can be set to only about 17 m at the longest so as not to hinder road traffic. It was

Further, a means has been proposed in which the lower part of the guide column has a separation structure in which it is folded down via a pivot pin in a horizontal position during transportation or self-propelling, and the horizontal length in the horizontal position is shorter than the total length in the upright position. However, the length of the folded portion is restricted to a range where the lower end does not touch the ground, generally about 3 m at maximum.

Therefore, when a long guide pillar of, for example, 20 to 25 m is required to deeply excavate or drive piles or sheet piles, press fit, etc. depending on the properties of the ground, the type of construction, the size, etc. Since the machine for foundation construction in which the guide pillar of is held in the crane body is unusable, it takes a lot of labor and time to assemble the long guide pillar at the construction site and disassemble it after the construction. Has been done.

In view of the above-mentioned circumstances, the present invention, in which the guide pillar is held by the self-propelled crane main body, the total length of the guide pillar in the upright posture during construction can be set to a long length such as 20 to 25 m, and the trailer can be set. The guide stanchions can be mounted on the crane body in a well-balanced state with a short horizontal length that does not hinder road traffic during transportation and self-propelled at construction sites, and the posture of the guide stanchions can be changed safely and securely. The purpose is to provide a foundation construction machine.

(Means for Solving the Problems) In order to achieve the above-mentioned object, in a machine for foundation construction according to claim (1) of the present invention, a guide strut of an elevating member such as an auger machine or a pile hammer is used as a strut body. The lower end of the strut body is detachably connected to the joint strut, and guide rails extending along the longitudinal direction of the strut body are provided on the upper and lower portions of the strut body. A back stay that is slidably connected to the upper guide rail of the strut body and that can be extended and retracted and can be depressed, and a tip located at the front of the crane body and slidably coupled to the lower guide rail of the strut body. A support arm that can be moved up and down, and a mast that can be moved up and down and that is located between the back stay and the support arm and that can slidably abut the tip of the guide support on the guide support, are attached. The main body is provided with locking means for locking the tip of the back stay at the lower end of the upper guide rail in a non-slidable manner and locking means for locking the tip of the support arm at the lower end of the lower guide rail. The following configuration is adopted.

Further, similarly, in the foundation construction machine according to claim (2) of the present invention, in the above-mentioned claim (1), the lower part of the pillar main body can hang down via a pivot pin in a horizontal posture of the pillar main body. This is a structure that is formed separately.

(Operation) The total length of the indoor support column in the upright posture during construction is, for example, 20 to 25 by adding the connection support column to the lower part of the support column body.
It can be set as long as m (Fig. 1). Further, if a plurality of joint columns having different lengths are prepared, the above total length can be changed. On the other hand, during transportation by a trailer or by self-propelling, the horizontal length of the guide column in the horizontal posture can be shortened to, for example, 17 m or less by removing the connecting column (Fig. 7).

Then, in the horizontal posture of the support column body, the tip of the support arm is located at the upper end (rear end) of the lower guide rail, while the tip of the back stay is located at the upper end (rear end) of the upper guide rail in the contracted state. With this setting, the main pillar body is supported at a well-balanced end position with respect to the main crane body (Fig. 7). For the purpose of improving the stability in this state, locking means for fixing the tip of the support arm at the upper end (rear end) position of the lower guide rail may be provided.

Next, in order to shift the pillar body from the above horizontal posture during transportation or self-propelling to the upright posture during use, first, the back stay is extended. As a result, the pillar body moves rearward while being horizontally held on the crane body, and stops at the position where the tip of the support arm slides and reaches the lower end (front end) of the lower guide rail (Fig. 9). . When the back stay is contracted after the tip of the supporting arm is fixed at the lower end (front end) position of the lower guide rail by the locking means at the rear end position of the strut body, the strut body does not move. The tip of the backstay slides forward along the upper guide rail and reaches the lower end (front end) of the guide rail (10th
Figure). Here, the tip of the back stay is fixed to the lower end (front end) of the upper guide rail by the locking means. Thus, the guide stanchions fixed to the backstay and the supporting arm at the lower end positions of both guide rails horizontally drive the backstay and supporting arm by raising the mast and extending the backstay. It tilts and stands up with the front end side lower than the posture (Fig. 11), and finally shifts to the upright posture. In this upright position, the supporting position of the support arm is the lower end of the lower guide rail, so the lower end of the supporting body is in a high position, and the height required for the addition of the connecting columns is secured (Fig. 12).

To switch from the upright position to the horizontal position, the operation procedure reverse to the above may be performed.

If the lower part of the pillar main body is formed so as to be hung down via the pivot pin in the horizontal posture of the pillar main body, the horizontal length of the pillar main body during transportation and self-propelling becomes shorter.

(Example) Hereinafter, the present invention will be specifically described based on illustrated examples.

FIG. 1 shows an earth auger, which is an embodiment of the present invention, in which a self-propelled crane main body 1 is provided with a pair of left and right guide struts 2 which can be telescopically driven and a rear backstay 3 and a front portion which can be lifted and lowered. An auger machine 6 as an elevating member is vertically mounted on the guide column 2 on an elevating guide rail 2a provided on the front side of the guide column 2 so as to be vertically movable. Reference numeral 7 is a leader top with a sheave provided on the top of the guide column 2, and a pile 9 is hung from the ground by a wire 8 as shown by a dashed line in the figure to make a vertical driving or press-fitting posture along the guide column 2 or the auger machine 6 is installed. Similarly, the wire 8 is hung. A drive system using a chain (not shown) arranged along the guide column 2 can be used for raising and lowering the auger machine 6.

The guide column 2 is composed of a column body 10 and a removable column 11 connected to the lower end of the column body 10. Further, the lower portion of the column main body 10 is formed as a folded-down portion 10b separately from the column portion 10a, and is connected to the column portion 10a via a pivot pin 12a and a locking pin 12b. By removing the pin 12b, the pin 12b can be rotated rearward.

Here, the total length of the guide pillar 2 is usually set in the range of about 17 to 25 m, and for example, when the total length is about 23 m, the length of each part is
The main pillar 10a of the strut body 10 is about 15 m, and the folded part 10b is 3 m
The joint pillar 11 is about 5 m.

On the other hand, on the rear side of the pillar body 10, an upper guide rail 13 reaching the top of the pillar body 10 and a folded-down portion 10b from the bottom of the main pillar portion 10a.
And a lower guide rail 14 extending to the lower end thereof are arranged along the longitudinal direction and in the same length. Also, the pillar body
Rotating leaders 2a and 2 are provided at a position closer to the upper part of 10 and the lower end of the folded-down part 10b.
The lower parts 13a, 14a of these are located in these rotary leader parts 2a, 2b and separated from the upper side. The lower guide rail 14 is also vertically separated at the boundary between the main pillar portion 10a and the folded-down portion 10b.

Each backstay 3 has an upper telescopic cylinder 3a
And a lower single-acting cylinder 3b are coaxially connected to each other on the base side, and the piston rod tip of the lower cylinder 3b is pivotally attached to the crane body 1 and the upper cylinder 3a has an upper portion at the piston rod tip. Guide rail 13
It is pivotally attached to a sliding bracket 15 which is slidably fitted in the. The support arm 4 is composed of a cylinder pivotally attached to the crane main body 1 so as to be vertically swingable, and a sliding bracket 16 slidably fitted to the lower guide rail 14 at the tip of the piston rod of the cylinder. The cylinder 4a is mounted on the crane main body 1 and can be lifted and lowered by the cylinder 4a.

Further, the crane body 1 includes a back stay 3 and a support arm 4.
Mast 1 located between and and driven up and down by cylinder 17a
7 and a columnar column support 18 located behind the back stay 3 are provided. The mast 17 and the column support 18
Rollers 17b and 18a are attached to the tops of the respective.

As shown in FIG. 2, FIG. 3 and FIG. 6, the upper and lower guide rails 13 and 14 are composed of channel materials arranged opposite to each other, and are fixed to the sliding brackets 15 and 16 inside thereof. Sliding blocks 15a and 16a are slidably fitted. Both ends of both guide rails 13 and 14 are closed. Further, the guide column 2 is formed by the rectangular tubular member 19a except the rotation leader portions 2a, 2b.
2b are both cylindrical tubular members 19a connected to upper and lower rectangular tubular members 19a by bolting end flanges to each other, and cylindrical outer tube 1
9c is fitted so as to be rotatable in the circumferential direction. Then, the second
As shown in the figure, in the upper rotary leader 2a, the outer tube 19
The separated lower part 13a of the upper guide rail 13 is fixed to the upper part of the outer periphery of c, and the bracket 20 for hooks having a U-shape in a plan view is fixed immediately below the lower part 13a.
And a hook rotating cylinder 22 are rotatably pivoted by pins 23a and 23b, respectively.
The tip of the piston rod 22 is connected by a pin 23c so as to be relatively rotatable. On the other hand, an engaging pin 24 is provided on the upper sliding bracket 15 via a mounting bracket 15b, and when the bracket 15 is located at the lower portion 13a of the guide rail 13, the hook 21 is engaged by the expansion and contraction operation of the cylinder 22. It is configured to engage / disengage the dowel pin 24. Further, in the lower guide rail 14, the sliding bracket 16 can be locked and fixed by the locking pins 25a and 25b at both upper and lower ends thereof.

As shown in FIG. 4 to FIG. 6, a pair of telescopic-type add-on cylinders 26, 26 for extending and contracting the piston rod 26a downward are fixed to the left and right sides of the folded-down portion 10b of the strut body 10, respectively. A dog 26b having a pin hole 27a into which the locking pin 27 can be inserted is provided at the tip of each piston rod 26a. In addition, FIG. 1, FIG.
As shown in FIG. 13, locking holes 27b corresponding to the pin holes 27a are provided on both upper sides of the joint column 11.

Next, the operation of the earth auger having the above structure will be described.

First, when carrying out trailer transportation or self-propelled at a construction site, as shown in Fig. 7, the pillar main body 10 is in a horizontal posture in which the folding portion 10b on which the auger machine 6 is arranged hangs down via the pivot pin 12a. , Non-sliding support arm 4 and mast
It is supported on the crane main body 1 by 17 and the column support 18. At this time, the back stay 3 is in the most contracted state, the sliding bracket 15 is located at the rear end of the upper guide rail 13, and
The sliding bracket 16 pivotally attached to the tip of the support arm 4 is immovably fixed to the rear end of the lower guide rail 14 by a locking pin 25a. Therefore, the pillar main body 10 is in the front end position on the crane main body 1, its center of gravity is on the substantially central portion of the crane main body 1, is maintained in a well-balanced and stable state, and the horizontal length is the main pillar. Even if the set dimension is set to 17 m or less, the length is slightly longer than the length of the portion 10a.

Next, when constructing a hole or a pile, first, as shown in FIG. 8, the folded-down portion 10b is raised and linearly connected and fixed to the main pillar portion 10a by the locking pin 12b. After that, the locking pin 25a
After removing the back stay 3, attach the back stay 3 to the lower cylinder 3b, for example.
Drives to extend. This allows the pillar body
10 moves rearward in a horizontal position, the sliding bracket 16 of the support arm 4 slides along the lower guide rail 14 to reach its front end position, and as shown in FIG. Set to position. Here, the sliding bracket of the support arm 4
16 is fixed at the front end position of the lower guide rail 14 by the locking pin 25b, the back stay 3 is contracted, and the sliding bracket 15 is moved to the front end position of the upper guide rail 13 as shown in FIG. It is locked by the engagement of the hook 21 and the engaging pin 24. Then, as shown in FIG. 11, the mast 17 is lifted by driving the cylinder 17a and the back stay 3
The extension operation of the column main body 10 starts so that the rear end side becomes higher. During the start-up or after the start-up, the support frame 4 is also lifted by driving the cylinder 4a to set the elevation angle larger than that in the state shown in FIGS. Then, the strut main body 10 is activated and finally takes the upright posture as shown in FIG. 12, but the height of the lower end from the ground is adjusted to be slightly larger than the length of the joint strut 11.
Note that this height adjustment can be easily performed by the expansion / contraction operation of the support arm 4 or the elevation angle setting.

Thus, after the pillar main body 10 is placed in the upright posture, the joint pillar 11 is carried in such that the upper portion thereof is located directly below the pillar main body 10, and both joint cylinders 26, 26 are extended as shown in FIG. 27a is aligned with the locking hole 27b of the joint column 11, the locking pin 27 is inserted into the locking hole 27b through the pin hole 27a as shown in FIG. 7B, and then both cylinders 26, 26 are contracted. As a result, the joint column 10 is raised as shown in FIG. 7C, then lifted in a vertical state as shown in FIG. 4D by separating from the ground, and the fitting guide portion 11a at the top of the joint column 10 is lifted.
The lower end flange portion 28a of the main body 10 and the upper end flange portion 28b of the joint column 11 overlap with each other. Then,
A guide strut 2 in which the main body 10 and the joint strut 11 are integrally connected to each other is formed by connecting the overlapped flange portions 28a and 28b with a bolt, and the lower end of the guide strut is grounded to form a first
The state of use is shown in the figure. It should be noted that it is also possible to facilitate a plurality of connecting columns 11 having different lengths and replace and use them according to the purpose.

On the other hand, in order to return from the use state to the self-propelled state or the transportation state as shown in FIG. 7, it is sufficient to perform the operation in the reverse procedure to the above.

In the above embodiment, the cylinders 26, 26 are used for the replenishing operation of the joint strut 11, but the cylinders 26, 26 may be omitted and the same operation may be performed by another suitable mechanical device instead. Good. Further, as means for locking the tips of the back stay 3 and the support arm 4 at the lower end positions of the upper and lower guide rails 13 and 14, various locking means other than the engaging / disengaging mechanism by the hook 21 and the locking pin 25b are exemplified. Can be adopted.
Further, the support arm 4 may be a non-stretchable type.

Furthermore, the present invention can be applied to the pillar main body 10 that does not have the folded-down portion 10b, and the detailed configuration of each portion can be variously modified in addition to the examples.

(Effects peculiar to the invention) According to the present invention, as a type of foundation construction machine in which the guide columns of the elevating member such as an auger machine and a pile hammer are held by the self-propelled crane body, guidance in an upright posture during construction The total length of the stanchions can be set to a long length of 20 to 25 m, for example, and it can also be applied when it is necessary to pierce, stake piles or sheet piles or press fit deeply depending on the characteristics of the ground and the type and size of the construction. Therefore, it does not require much labor and time by assembling and disassembling a long guide pillar at a construction site as in the past, and the guide is in a horizontal posture when traveling by road on a trailer or when self-propelled at a construction site. The pillars can be held on the crane body in a stable and well-balanced state with a short length, such as 17 m or less, that prevents passage, and the vertical and horizontal postures can be easily switched. We can provide that certainty can be performed.

Further, according to the configuration of claim 2 of the present invention, there is an advantage that the horizontal length of the guide column in the horizontal posture can be set to be shorter, which facilitates transportation and facilitates self-propelled movement at the construction site. .

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side view of the entire foundation construction machine in a construction state, and FIG. 2 is a view showing a locking mechanism of a back stay tip at a lower end of an upper guide rail. 3 is a vertical sectional side view of a portion, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, FIG. 4 is a front portion of the lower part of the column main body, FIG. 5 is the same side view, and FIG. 6 is FIG. VI-VI line sectional view of
7 to 12 are side views of the entire foundation construction machine showing the process of shifting the strut body from the horizontal posture when not in use to the vertical posture for construction in the order of operation, and FIGS. 13A to 13D are joint strut columns. It is a side view of the principal part which shows replenishment operation in order of operation. 1 ... Crane body, 2 ... Guide post, 3 ... Back stay,
4 ... Support arm, 6 ... Auger machine (elevating member), 10 ... Strut body, 10b ... Folding part (lower part of strut body), 11 ... Joint strut, 12a ... Pivot pin, 13 ... Upper guide rail, 14 ... Lower guide rail, 17 ... Mast, 21 ... Hook (locking means), 25b ... Locking pin (locking means).

Claims (2)

[Claims] 1. A guide column for an elevating member such as an auger machine or a pile hammer is composed of a column body and a joint column removably connected to its lower end, and the column body is provided at the upper and lower portions of the column body, respectively. The guide rail is provided along the longitudinal direction of the crane, while the self-propelled crane main body has a back stay slidably connected to the upper guide rail of the pillar main body, which is extendable and retractable and can be depressed, and the crane main body. A support arm which is located at the front part of the above and slidably connected to the lower guide rail of the above-mentioned strut main body,
Mounted between the back stay and the supporting arm are a mast that can be lifted and lowered to slidably abut the guide strut, and the strut body is provided with the tip of the back stay as an upper guide rail. A machine for basic construction comprising locking means for locking the lower end of the lower arm so that it cannot slide, and locking means for locking the tip of the support arm at the lower end of the lower guide rail. 2. The foundation construction machine according to claim 1, wherein the lower part of the pillar main body is divided and formed so as to be hung down via a pivot pin in a horizontal posture of the pillar main body.