JPS6363820A - Penetrator for shape steel by biaxial auger - Google Patents

Abstract

PURPOSE:To bury shape steels at the same time as excavation is made by augers by a method in which a shape steel is set between two augers and excavation made is by expanded blades on the lower end of the augers. CONSTITUTION:An upper slewing part 1c is set on a lower traveler 1a, a boom 2 is attached to the upside of the part 1c, and a leader 3 is attached to the tip of the boom 2. A frame 5 is attached in a vertically movable manner along the leader 3. A winch 12 to hang down a shape steel 33 through a rope 40 along the leader 3 is provided, and two auger drivers 6 and 7 are set on the frame 5 in a mutually approaching and separating manner by a closing gear. Augers 24 and 25 are also attached to the frame 5 provided with expanded blades 46 and 47 of different heights at their lower ends. A chuck for the shape steel 33 is provided to the lower part of the frame 5. The shape steel can thus be buried at the same time as excavation is made by the augers.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for burying shaped steel such as H-shaped steel underground using a two-shaft auger.

(Prior Art) When burying U-shaped sheet piles underground using a pile driver, a single-shaft screw auger (hereinafter referred to as an auger) is used, for example, as shown in Japanese Patent Publication No. 54-3522. By excavating a vertical hole and hooking a locking pawl provided on a casing fitted onto the auger onto a pawl receiver provided on the inner surface of the sheet pile, the sheet pile is buried simultaneously with excavation by the auger. This construction method has been praised for its noise-free and vibration-free construction, but if you try to apply this method to burying H-shaped steel, there will be too much burying resistance, so when burying H-shaped steel, for example, As shown in Japanese Patent Publication No. 53-35163, after a vertical hole is excavated with an auger, an H-shaped steel is generally installed in the hole. However, this construction method has the disadvantage that it takes time to bury the shaped steel. If the H-shaped steel can be buried at the same time as the excavation with an auger, as with the H-shaped steel sheet pile, it will be preferable to use FF in terms of work speed.

As a known construction method for burying H-beams following an auger, there is a construction method disclosed in Japanese Patent Publication No. 53-25162, in which a circular support frame is attached to the front of the leader so that it can be raised and lowered by a hydraulic cylinder. , raise the auger,
An H-shaped steel is gripped by a cylinder or the like and set vertically in a circular support frame so as to be located below the auger, and by lowering the auger drive device along with the auger along the leader, the H-shaped steel is placed in the support frame. An auger is inserted into the guide tube provided to sandwich the steel shape, and the auger excavates in advance, and the H-shaped steel follows this and is pushed in (that is, the support frame is lowered together with the H-shaped steel using a hydraulic cylinder, etc.)
Therefore, it is buried.

However, according to this known construction method, the auger must be pulled up and the H-shaped steel placed into the support frame below it, and then the auger must be lowered and inserted into the guide tube within the support frame to perform the work. Therefore, there is a problem in that the work cannot be carried out unless a leader approximately twice as large as the auger is provided, and only short H-shaped steel can be buried. Furthermore, since the embedding resistance is large, there is a problem that the shaped steel cannot be buried unless a shaped steel pushing device such as the above-mentioned hydraulic cylinder is used.

In addition, when constructing a concrete building, in order to prevent the ground from collapsing in the adjacent land and construct a foundation, H-shaped E etc. are buried at the boundary with the adjacent land to retain the earth. As a result, it has become difficult to bury shaped steel using conventional pile drivers, which require a wide working range.

(Problems to be Solved by the Invention) In view of the above points, the present invention enables burying of shaped steel, etc. at the same time as excavation with an auger, makes it possible to bury shaped steel in narrow urban areas, and can be provided at low cost. Another object of the present invention is to provide a press-fitting tool for molded steel, which allows the molded steel to be buried without necessarily having a pushing device.

(Means for solving the problem) In order to achieve this object, in the present invention, an upper rotating body is installed on the lower traveling body via a swing device, and the upper rotating body is capable of raising and lowering by a hydraulic cylinder. Install the boom,
A leader is attached to the tip of the boom so as to be rotatable around a pin, an extendable support device is attached between the lower part of the leader and the upper revolving body, and a winch is used to move the leader along a guide member provided on the leader. A frame is attached so that it can be raised and lowered, and a winch is installed to suspend the shaped steel along a leader via a rope.Two auger drive devices are installed on the frame so that they can be moved close to and separated from each other by an opening/closing device. An auger is attached to each of the two augers, expansion wings are attached at different heights to the lower end of each auger, and a chuck device for gripping the shaped steel is provided at the bottom of the frame. By opening, it is possible to lift H-beams etc. between the augers and push them together with the augers with the augers close together, making it possible to bury long H-beams etc. that correspond to the length of the hobhole. Also, since the magnifier allows excavation of a wider area than an auger, the Hμ! This makes it possible to bury steel, etc. In addition, the present invention utilizes a hydraulic system that has conventionally been stacked with various sizes of machines as a base machine! This can be achieved through partial modification, such as using a bell and attaching an arm to the tip of the boom and a leader instead of a packet, so it is possible to provide a small, low-cost molded steel press-in device, which is suitable for burying molded steel in narrow sites in urban areas. can be provided.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are general views of one embodiment of the present invention. Reference numeral 1 indicates a main body of a working machine based on a hydraulic excavator. Undercarriage body 1a and swing gear 511b on it
It consists of an upper revolving body 1c installed through the upper rotating body 1c. A boom 2 is attached to the upper revolving body 1c so as to be movable up and down by a hydraulic cylinder 2a. Pin 2b is attached to the tip of boom 2.
A leader 3 is attached so as to be rotatable around the center by an angle adjustment device such as a hydraulic cylinder 2C, and a telescopic support device 2d such as a hydraulic cylinder is attached between the lower part of the leader 3 and the upper rotating body IC. The support device 2d is made expandable and retractable, and the hydraulic cylinder 2C makes the leader 3 vertical, and the support device 2d is fixed in a non-expandable manner, so that the leader 3 can take a vertical posture. has been done. A guide member 4 such as a parallel pipe is provided at the front of the leader 3 . Reference numeral 5 designates a frame on which two auger drive devices 6 and 7 are installed, and the left and right sliding members 8 attached to the top and bottom of the back of the frame 5 are connected to the guide member 4.
By engaging in a hugging manner, the frame 5
is mounted so as to be movable up and down along the guide member 4. A winch 12 for raising and lowering the frame 5 is installed on the upper revolving body 1c of the main body 1, and a rope 13 wound around the drum of the winch 12 is hung on a sheave 14 of the leader 3.
A hook is rotated between the sheave block 15 and a sheave block 16 attached to the upper part of the frame 5, and the frame 5 is moved up and down by the operation of the winch 12.

The auger drive devices 6.7 installed in the frame 5 each consist of a hydraulic motor and a reduction gear, and as shown in FIG. The other driving device 7 is fixed to the frame 5, and is attached to a movable frame IO rotatably attached to the frame 5 around a pin 9, and is attached between a part of the movable frame IO and the frame 5. Hydraulic cylinder 1
The driving device 7 is rotated about the pin 9 by the opening/closing device of the first class, and thereby the driving device 7 is configured to move toward or away from the fixed driving device 6. As shown in FIG. 4, as a mechanism for bringing the drive devices 6 and 7 closer to each other and moving them apart, one of the drive devices 7 is connected to a hydraulic cylinder 17.
．． 18 or the like, and not only one drive device 7 but both drive devices 6
．． By moving 7 together, it is also possible to move the two closer together or farther apart.

As shown in FIGS. 5 and 6, the output shaft 20.21 of each drive 6.7 has, for example, a flange connection 22.23.
The augers 24 and 25 are attached, respectively. Further, a frame 26 is provided on the lower surface of the frame 5 for attaching a chuck device, and a chuck device 27 is attached to the frame 26 so as to be vertically adjustable. That is, the chuck device 27 has a pair of gripping tools 30 and 31 mounted in a box-shaped frame 28 with an opening at the bottom so as to be opened and closed by a hydraulic cylinder 32 around a shaft 29, and a molded steel ( The illustrated example is a gripping part 34.3 of H-shaped steel) 33.
5 protrudes downward from the box-shaped frame 28, and a plurality of attachments formed on the box-shaped frame 28 are provided by the edges 36, and a large number of attachments arranged vertically at equal intervals on the frame 26 are provided by the holes 3.
The chuck device 2
It is constructed so that the height of 7 can be 31 sections, and as a result,
When using a certain length of auger 24.25, the shape steel 3
The height of the chuck device 27 can be selected according to the length of the chuck device 27.

40 is a rope for hoisting the shaped steel 33;
As shown in FIG. 2, the wire 2 is wound around a winch 43 attached to the leader 3, suspended from a sheave 44 at the top of the leader 3, passed through an opening 45 in the frame 5, and attached to the steel 33 with a tool 42. and are connected via a hanging ring 41.

As shown in FIG. 1, at the lower end of each auger 24, 25,
The enlarged I46 and I47 are installed at different heights so that they do not interfere with each other. These expansions Q 46 , 4
7, as shown in FIG. 7, has two wings 48 attached with pins 49 so that they can be opened and closed, and when the lower end of χ48 touches the excavated ground, it opens as shown in a, allowing excavation of a wide area. When not in contact with the ground, the wings 48 are in a closed state due to their own weight as shown by the solid line.

As shown in Fig. 7, the enlargement χ46 of the auger 24.25,
The following auger steadying mechanism is provided above the part where 47 is attached. That is, flange 53° 54 is provided around the shaft 50 at intervals vertically, and the flange 53
．． By not providing the screw blade 51 between the hooks 54, the hook forms a hook attachment portion 52, and the hook attaches the hook attachment portion 52 and the half-split cylinder bodies 55 and 56 to form the port 5.
7 and a cylindrical body integrated with a nut 58 are rotatably fitted, and one of the half-split cylindrical bodies 56 has a claw receiver provided at a part of the corner between the web 60 and the flange 61 of the mold W433. A hook 62 or 63 has a hook 64 fixed to it. A wear-resistant material may be interposed between the zero body 55 and the hook attachment portion 52. In addition, if the length of the shaped steel 33 is short, this steady rest mechanism may be omitted.

When burying the shaped steel 33 using this press-fitting bolt, first, as shown in FIG. 8(A), by contracting the hydraulic cylinder 11 shown in FIG. 3, the drive device 7 and its output shaft are 21 and the auger 25 attached to it, as shown by the arrow e.
As shown in the figure, the rope 4 is separated from the auger 24, etc., and then the rope 4 is attached to the hanging ring 41 attached to the steel mold 33 lying on the ground.
Hang the hook 42 of 0, operate the winch 43, pull up the mold steel 33, and ¥! The steel 33 is moved from the slightly inclined position shown by the two-dot chain line in FIG. 8(B) to the web 6 as shown by the solid line.
The web 60 is placed in the chuck device 27 which is in an open state with the 0 facing in the front-rear direction, and the hydraulic cylinder 32 of the chuck device 27 is extended to chuck the shaped steel 33.
Next, as shown by the arrow f in FIG. 8(C), by extending the hydraulic cylinder 11, the auger 25 is positioned between the web 60 and the flange 61 of the mold fA33, and then the winch 12 is moved. By lowering the frame 5, that is, the augers 24 and 25 slightly, the
), the hooks attached to the lower part of each auger 24, 25 hook the claws 64 onto the claw receivers 62, 63, respectively, allowing the winch 43 wrapped around the rope 40 to rotate freely, and the winch 12 to the frame 5. It is operated in the descending direction, and after the expansion 146 lands on the ground and spreads its wings, the winch 12 with the rope 13 wrapped around it is allowed to rotate freely, excavation is carried out by the expansion χ46.47, and the excavated soil is pushed to the ground by the blades 51, while With the mold fA33 held by the chuck mounting 27, the mold fA33 is buried at the same time as excavation.In this case, the length of the mold m33 is If the length is long, the auger 24.
25 vibration is prevented. FIG. 2 shows a case where a shaped steel 33 is buried in a boundary area with an adjacent building 75.

9 and 10 show the relationship between the shaped steel and the auger 24, 25 to be buried according to the present invention, and in FIG. If it is large, that is, the shape steel is the smallest, in this case, the entire shape steel 33 is enlarged ff46.
47, the burial resistance is minimized. In the case of Figure 1O, enlarged i46.4
If the two-run shield 1 of the shaped steel 33 is buried in a portion that corresponds to the tangent line in the excavation 7, and the shaped steel 33 becomes larger than this, the burying resistance will increase.

When carrying out the present invention, the enlarged χ46, 47 excavates a wider area than the auger 24.25, and excavates almost the entire surface of the shaped steel or an area close to it, so the burying resistance when burying the shaped steel is small; Basically, a pushing device is not required, but in order to increase the embedding speed, for example, as shown in FIG. rope 7
The rope 76 is wound around the sheaves 77 to 80 provided on the main body L and at the bottom of the leader 3, and connected to the frame 5. When burying the shaped steel, the rope 76 is
What is necessary is to push the 5 steel 33 by winding it up.

The present invention also provides an auger 24.2 as shown in FIG.
This can also be applied to the case where the cage 5 is surrounded by a casing 71. In this case, the hooks 64 are formed on the cage 1 and hooked onto the claw receivers 62 and 63 of the shaped steel 33, so that the augers 24, 25 It is possible to prevent the gap between the lower ends from increasing. Furthermore, fresh concrete or the like may be poured through the auger or the lower end of the casing. In addition, the type steel to be buried according to the present invention is not only H type steel, but also
T5, U-shaped, and L-shaped steel can all be buried with the web interposed between the augers. Further, the leader 3 can also be supported so as to be able to rotate.

(Effects of the Invention) As described above, in the present invention, the shaped steel is interposed between the two augers and excavation is performed by the expanded material at the bottom end of the auger, so the burying resistance when burying the shaped steel is small. , it is possible to bury the shaped steel at the same time as excavating with the auger, and therefore, the burying of the shaped steel can be carried out as efficiently as in the case of sheet piles. Furthermore, according to the present invention, the steel mold is set with the gap between the augers open, and the excavation and burying are performed with the space between the augers closed, so that it is possible to bury the steel mold corresponding to the length of the hollow leader. This makes it possible to bury long shaped steel using small machines. Further, according to the present invention, since the embedding resistance of the shaped steel is small, the shaped steel can be buried without necessarily having a pushing device.

Further, the present invention can use a hydraulic excavator as a base machine, and hydraulic excavators have conventionally been easily available in various sizes, and it is possible to provide an inexpensive machine that can easily work even in a narrow site. This makes it possible to realize a pile driver suitable for burying shaped steel in areas with excessive tension such as in urban areas.

[Brief explanation of drawings]

FIG. 1 is an overall front view showing an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1.
4 is a diagram showing a modification of FIG. 3, FIG. 5 is a partially sectional front view showing the chuck device of the embodiment, FIG. 6 is a sectional view taken along line BB in FIG. 5, and FIG. FIGS. 8A to 8D are exploded perspective views showing the auger steady rest mechanism in this embodiment; FIGS. The figure is a plan view showing the relationship between the auger and the steel mold in this embodiment, and FIG. 11 is a perspective view showing an auger steadying rest when a casing is used in the present invention. Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] An upper rotating body is installed on the lower traveling body via a rotating device,
A boom is attached to the upper rotating body so that it can be raised and lowered by a hydraulic cylinder, a leader is attached to the tip of the boom so as to be rotatable about a pin, and a support device that is extendable and retractable between a lower part of the leader and the upper rotating body. A frame is attached to the frame so that it can be raised and lowered by a winch along a guide member provided on the leader, and a winch is provided for suspending the shaped steel along the leader via a rope, and the frame is moved toward and away from each other by an opening/closing device. Install two auger drive devices as shown below.
2. An auger is attached to each drive device, expanding wings are attached at different heights to the lower end of the auger, and a chuck device for gripping the shaped steel is provided at the bottom of the frame.
Press-in device for shaped steel using a shaft auger.