JP2003206532A - Submerged press-in machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a submerged press-in machine capable of performing press-in work of a pile whether on the water or in the water. <P>SOLUTION: Hard rubber plates 7A, 7B, and 7C are fixed to inside surfaces of grooves 5a and 5b formed on both upper sides of a fixed frame 5 of a fixed part 3. An advancing retreating frame 6 of a movable part 4 is slidingly supported via flange parts 6a and 6b by these hard rubber plates 7A, 7B, and 7C. A hard rubber plate is similarly inserted into a front end groove of a depression-elevation frame. The flange parts of a press-in frame fitted to this groove is made freely slidable to dispense with lubricating oil of a sliding part. Pollution of seawater is prevented, and the press-in work of the pile in the water can be performed. Hard rubber is replaced with spare parts when a friction coefficient reduces. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater press-fitting machine used, for example, in pile construction work on a quay wall of a harbor.

[0002]

[Prior Art] Conventionally, for civil engineering works in ports and rivers,
A press-fitting machine is used in which steel sheet piles, steel pipes, etc. are press-fitted into the ground at predetermined intervals by hydraulic cylinders (for example,
JP-A-10-8466, JP-A-2001-4966
(See Japanese Patent Publication No. 3).

In all of these press-fitting machines, a connecting portion (hereinafter referred to as
It is called a joint. ), It is pressed into the ground at the pitch between these joints, and because it is noise-free and vibration-free, it is widely adopted not only in ports but also on land as an environmentally friendly construction method. .

In this construction method, the steel sheet piles are hydraulically sandwiched, or the inner or outer peripheral side of the steel pipes is hydraulically pressed to sandwich the steel sheet piles and the steel pipes, and these piles are grasped from above. Press down with a hydraulic cylinder for press-fitting and press-fit into the soil.

Further, a gripping portion for gripping a steel sheet pile or a steel pipe and a hydraulic cylinder for press-fitting are incorporated in a press-fitting machine,
This press-fitting machine is mounted on a steel sheet pile or a steel pipe that has been driven in advance. The hydraulic device serving as the drive source of the hydraulic cylinder is installed on land, and the hydraulic device and the press-fitting machine are connected by a high-pressure hydraulic hose.

Therefore, this press-fitting machine is provided with a plurality of holding portions for holding steel sheet piles and steel pipes by hydraulic pressure at the bottom,
The pressing force and the frictional force of the holding portion support the press-fitting machine main body and also the reaction force of the hydraulic cylinder during press-fitting.

When one or two piles are press-fitted, the press-fitting machine releases the above-mentioned gripping part and holding part and is then lifted by a crane to transfer the holding part to a newly pressed steel sheet pile or steel pipe. Supported.

[0008]

By the way, when such a press-fitting machine is used for construction at a shore or a river mouth near this shore, the construction may be restricted by the ebb and flow of the tide.

That is, depending on the position of the upper end of the steel sheet pile or the steel pipe to be press-fitted, the press-fitting machine may be submerged at high tide. Then, the lubricating oil in the sliding part of the press-fitting machine may flow out into the sea to form seawater. Not only does it pollute the Gulf, but friction on the sliding surface increases, and it wears and becomes inoperable.

Therefore, under such a condition,
Conventionally, construction is performed only at low tide, and when the tide is high, the construction is interrupted and the crane is used to move the press-fitting machine to land and wait until low tide. Therefore, the work schedule is extended and the construction cost is increased.

Therefore, an object of the present invention is to obtain an underwater press-fitting machine capable of press-fitting a steel sheet pile, a shaped steel, a steel pipe or the like regardless of whether it is on water or in water.

[0012]

In order to solve this problem, the present invention is to mount a plurality of adjoining existing piles via a holding portion, and a fixed portion having an advancing / retreating guide portion formed on the upper portion thereof. The advancing / retreating sliding part is loosely fitted to the advancing / retreating guide part of the fixed part, and is a movable part that moves forward / backward by the advancing / retreating actuator. In a submersible press-fitting machine equipped with a gripping part that hydraulically grips a pile that is additionally press-fitted into an existing pile at predetermined intervals, and a press-fitting actuator that raises and lowers this gripping part, the forward / backward sliding part and the vertical sliding part are fitted together. It is characterized in that the hard rubber is inserted into the advance / retreat guide part and the elevating guide part.

It is preferable that the elevating / lowering guide portion is composed of an advancing / retreating frame having an advancing / retreating sliding portion, and a depression / elevation frame connected to the advancing / retreating frame via a pin and an elevation / elevator actuator. It is preferable that a corrosion resistant coating is applied to the surfaces of the sliding portion and the lifting / lowering sliding portion.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an underwater press-fitting machine of the present invention will be described in detail below with reference to the drawings. 1 is a plan view showing an embodiment of an underwater press-fitting machine of the present invention, and FIG.
The front view of Fig. 3 shows the case where the press-fitting material is a steel pipe.

1 and 2, the submersible press-fitting machine 1 is shown.
Is a fixed part 3 that is mounted and fixed to the steel pipes 2A, 2B, and 2C indicated by chain lines that have already been press-fitted via a holding part to be described later, and is movable in the direction indicated by arrow A on this fixed part 3. It is composed of the movable part 4 mounted.

Of these, as shown in FIG. 3A, which is an enlarged view of the BB cross section of FIG. 2, the fixing portion 3 is a box in which the upper and lower sides of a fixing frame 5 which is the main frame of the fixing portion 3 are opened. The guide grooves 5a, 5b (advancing / retreating guide portions) are formed symmetrically on the left and right inside of the upper part, and urethane rubber (made by Oji Rubber Co., Ltd.) is formed on the inner surface of these guide grooves 5a, 5b. Material symbol:
The strip-shaped hard rubber plates 7A, 7B, 7C cut from the plate material 6 mm of LM1090) are fixed with a plurality of flat head screws 8 as shown in FIG. 3B of the partially enlarged sectional view of FIG. Has been done.

The material properties of the hard rubbers 7A, 7B and 7C are as follows, and the surface friction coefficient is low.

That is, hardness 90 g / cm ² , tensile strength 300 kg / cm ² , breaking elongation 450%, tear strength 70 kg / cm ² , 100% modulus 82
kg / cm ² , 300% modulus 165 kg / c
m ² , Anti-milking elasticity is 43%.

Further, a strip-shaped hard rubber plate 7D is also fixed vertically with a plurality of flat head screws inside the opening at the upper end of the fixed frame 5.

On the other hand, in the movable portion 4, the left and right flange portions 6a and 6b (advancing and retracting sliding portions) of the advancing and retracting frame 6 which is the main frame of the movable portion 4 are fitted in the left and right guide grooves 5a and 5b of the fixed frame 5, respectively. It is fitted between the fixed hard rubber plates 7A and 7C, and the left and right vertical surfaces of the upper part are in contact with the hard rubber plate 7D, and further between the rear part of the fixed frame 5 and the front end of the movable frame 6. Against
A front and rear cylinder 9 having a hard chrome-plated rod protruding rearward is provided horizontally in the front and rear direction.

The fixed frame 5 and the advancing / retreating frame 6 are made of four types of spheroidal graphite cast iron (symbol FCD7009 of JIS5502), and the above-mentioned hard rubber plates 7A, 7B, 7C,
The surface, including the contact surface with 7D, is coated for rust prevention.

1 and 2, holding portions 10A, 10B and 10C are provided below the fixed portion 3,
Of these, the holding portions 10A, 10B are provided so as to be movable back and forth (note: left and right direction of paper surface) via a guide rail (not shown), and these holding portions 10A, 10B, 1
0C is connected to each other by cylinders 10b and 10c.

In these holding portions 10A, 10B, 10C, hydraulic jack portions are arranged in the lower portion at 90 ° intervals in a plan view (not shown), and each hydraulic jack portion is
Claws 11 having an arcuate outer periphery are provided in a protruding manner, and in FIG. 2, these claws 11 press the inner peripheral surfaces of the steel pipes 2A, 2B, 2C. The guide rail and the claw 11 are both plated with hard chrome.

Further, steel pipes 2E, 2F, 2G, 2H having small diameters indicated by chain lines below the steel pipes 2A, 2B, 2C and 2D and steel pipes 2J indicated by chain lines at the right end of FIG. 2 will be described later.

Referring again to FIGS. 1 and 2, the advancing / retreating frame 6 is similar to the advancing / retreating frame 6 in that four types of spherical graphite castings (FC
The lower part of the front end of the elevation frame 13 made in D7009) is the shaft 1
It is slidably connected via 2, and this elevation frame 13
Between the upper front part of the front and the rear part of the advancing / retracting frame 6, the rod is plated with hard chrome and is indicated by a chain line.
4 is provided obliquely.

As shown in FIG. 4 which is an enlarged detailed view of the portion B in FIG. 1, a concave portion 13a having a substantially convex shape in FIG. 4 is formed at the front end of the elevation frame 13, and both sides of the concave portion 13a are formed. On the other hand, grooves 13b and 13c, which are similar to the grooves 5a and 5b shown in FIG. 3 and serve as lift guides, are formed symmetrically,
Hard rubber plates 15A, 15B, and 15C having a strip plate shape and a thickness of 3 mm are also fixed to these grooves 5a and 5b by a plurality of flat head screws (not shown) as in FIG. 3B.

On both sides of the front end of the elevation frame 13, rods are plated with hard chrome, and press-fit cylinders 16A, 16B are provided.
Are vertically arranged symmetrically, and the press-fitting cylinder 16A,
The outer cylinder of 16B is fixed to the front end of the elevation frame 13, and shafts 16a and 16b are inserted through the rod end parts of the upper ends of these press-fitting cylinders 16A and 16B.

A press-fitting frame 17 is additionally provided in front of the elevation frame 13, and sliding parts 17a shown in FIG. Part 17a
17b, 17c as lifting slides on both sides of the
However, it is fitted between the hard rubber plates 15A and 15C fixed in the grooves 13b and 13c at the front end of the elevation frame 13, and is vertically movable.

Arms 18A and 18B are symmetrically formed on the press-fitting frame 17 from the left and right sides toward the upper rear part, and the upper ends of these arm parts 18A and 18B are connected to the upper end of the press-fitting frame 17. , The bearing portion 18 formed at the upper end of these
A groove having an open lower end is formed in each of a and 18b, and a rod end portion of an upper end of the press-fitting cylinders 16A and 16B is loosely fitted into the groove from below, and a shaft inserted into the rod end portion is inserted. Both ends of 16a and 16b penetrate laterally, and a pin (not shown) penetrates the ends of the shafts 16a and 16b.

A semicircular recess is formed on the lower front surface of the press-fitting frame 17, and rectangular projections 17a are formed on both sides of the front end of the press-fitting frame 17, as shown in FIG. The convex portion 17a is fitted into a concave portion 20a formed at the rear end of the arc-shaped front frame 20 adjacent to the front of the press-fitting frame 17, and the front frame 20 has the convex portion 17a and the concave portion. Two
0a is fixed to the press-fitting frame 17 by unillustrated tensile strength bolts inserted in a plurality of screw holes provided in the front and rear directions.

An upper portion of a press-fitting chuck 21 is inserted into and fixed to the press-fitting frame 17 and the front frame 20, and the press-fitting chuck 21 has an arcuate claw 21 projecting to the inner peripheral side by hydraulic pressure.
a are arranged at 90 ° intervals as shown in FIG.

Next, the operation of press-fitting a steel pipe with the submersible press-fitting machine constructed as described above will be described.

1 and 2, the submersible press-fitting machine 1 has holding portions 10A, 10B, 10C on steel pipes 2A, 2B, 2C.
Steel pipe 2D that is mounted via
The state before the steel pipe 2J is press-fitted further to the front of FIG.

1 and 2, in the advancing / retreating frame 6, the press-fitting frame 17, the front frame 20 and the chuck 21 are shown by chain lines in FIGS. 1 and 2 by the operation of the front and rear cylinders 9, and in FIG. The press-fitting frame 17 and the front frame 20 and the chuck 21 are moved up by the operation of the press-fitting cylinders 16A and 16B while moving forward together with the elevation frame 13 to the position indicated by the solid line.

When the steel pipe 2J shown by the chain line in FIG. 2 is supplied by a crane (not shown) between the press-fitting frame 17 and the front frame 20 and the inside of the press-fitting chuck 21 with the claws 21a retracted, an electromagnetic wave (not shown) is supplied. The claws 21a are actuated by the valve to grip the outer circumference of the steel pipe 2J, and then the press-fitting cylinders 16A, 16B are actuated so that the lower part of the steel pipe 2J follows the stroke of the press-fitting cylinders 16A, 16B in the underground of the bay. Is pressed into.

Next, the gripped state of the steel pipe 2J by each of the pawls 21a is released, and the rods of the press-fitting cylinders 16A and 16B are operated upward so that the press-fitting frame 17, the front frame 20 and the chuck 21 are located at the positions indicated by chain lines in FIG. Each claw 21a after being raised to
Is operated to further press-fit the steel pipe 2J.

After repeating this process, when the position of the upper end surface of the steel pipe 2J becomes flush with the upper end surfaces of the existing steel pipes 2A, 2B, 2C and 2D, the claws 21a are retracted to slightly move the chuck 21. While raising, the front and rear cylinders 9 are actuated to retract the elevation frame 13 and the press-fitting frame 17 together with the advancing / retreating frame 6 to the positions shown in FIG.

Next, in this submersible press-fitting machine 1, each of the pawls 11 and the pawls 20a is actuated and retracts while the posture of the submersible crane wire is maintained by the wire (not shown), and the crane is slightly lifted to hold the holding portion 10C. The holding portion 10B is moved above the steel pipe 2J, the holding portion 10B is moved above the steel pipe 2D, and the holding portion 10A is moved to a position above the steel pipe 2G, and then suspended.

As a result, the claws 11 loosely fitted in the steel pipes 2A, 2B, 2C are driven in the next step to move the steel pipes 2A,
The submersible press-fitting machine 1 is mounted on the steel pipes 2A, 2B, 2C by being pressed by the inner circumferences of 2B, 2C, and
Fixed.

Hereinafter, in FIG. 2 of the press-fitting frame 17 of the press-fitting machine 1, the steel pipe for press-fitting supplied by the crane is press-fitted to the position of the steel pipe 2D, and further the steel pipe for press-fitting supplied to the position of the steel pipe 2J is inserted. By press-fitting in the above-mentioned process and repeating this, a predetermined number of steel pipes are continuously press-fitted.

In this process, the advancing / retreating frame 6 which moves forward / backward by the front and rear cylinders 9 has the flange portions 6a, 6 shown in FIG.
b is the hard rubber plates 7A, 7B, 7C fixed to the left and right guide grooves 5a, 5b on the upper part of the fixed frame 5, and the hard rubber 7 on the upper part.
It moves back and forth by being guided by D and sliding.

Similarly, the press-fitting frame 17 that moves up and down by the press-fitting cylinders 16A and 16B has flange portions 17b and 1b shown in FIG.
7c moves up and down by being guided and slid by the hard rubbers 15A, 15B, 15C fixed in the left and right guide grooves 13b13c at the front end of the elevation frame 13.

Therefore, in the underwater press-fitting machine constructed as described above, since lubricating oil is not required in the sliding portion, there is a risk of contaminating seawater even if it is used on the coast and submerged in water at high tide. Not only is it possible to eliminate the problem, but also because the work can be continued without oil regardless of whether it is on water or in water, the construction period can be shortened.

The hard rubber fixed in each guide groove is
It is preferable to replace with a spare part by periodical inspection because the thickness gradually decreases, the coefficient of friction of the surface increases, and the operation slows down due to the long-term operation of the submersible press-fitting machine.

In addition, the contact surface of the hard rubber of the adjacent strips may be coated with an adhesive before fixing and joined to each other after fixing to prevent the risk of curling up. The contacting surface may be partially applied to supplement the fixing force of the countersunk screw.

Further, the size of the steel pipe changes depending on the place of operation, and for example, the small diameter steel pipes 2E, 2F, 2 shown in FIG.
In case of G, 2H, hydraulic cylinders 10b, 10c
This can be dealt with by operating the and changing the pitch of each holding portion 10A, 10B, 10C.

In the above embodiment, the pile to be press-fitted is described as a steel pipe, but even in the case of a steel sheet pile or a shaped steel, the arrangement and shape of the claws can be changed to make an underwater press-fitting machine. .

FIG. 6 shows a case where the press-fitting steel pipe is tilted and press-fitted. The elevation frame 13 and the press-fitting frame 17 are attached to the elevation cylinder 14.
Shows a case where the shaft 12 is tilted forward with the shaft 12 as a swing shaft.

As shown in FIG. 6, this press-fitting machine 1 changes the depression / elevation angle not only in the forward direction shown in FIG. 6 but also in the backward direction as shown in FIG. Can be pressed.

[0050]

As described above in detail, according to the present invention, a plurality of adjacent existing piles are mounted via a holding portion,
In addition, the advancing / retreating guide part is a fixed part formed on the upper part, and the advancing / retreating sliding part is loosely fitted in the advancing / retreating guide part of the fixed part, and the moving part is moved forward / backward by the advancing / retreating actuator. And a press-fitting portion for hydraulically gripping the pile that is additionally press-fitted into the existing pile at predetermined intervals by loosely fitting the lift slide portion in the lift guide portion,
In addition, in a submersible press-fitting machine equipped with a press-fitting actuator for moving the press-fitting part up and down, by inserting a hard rubber into which the forward-backward sliding part and the vertical sliding part are fitted to the forward-backward moving part and the vertical moving guide part, Since the forward / backward movement of the slide part and the vertical movement of the press-fitting part have been made possible, the pile can be press-fitted without interrupting the work regardless of whether it is on the water or in the water. A press-fit machine can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an underwater press-fitting machine of the present invention.

FIG. 2 is a front view of FIG.

3 (a) is an enlarged view taken along line BB of FIG. 2 (b).
Is a partially enlarged detailed view of (a).

FIG. 4 is an enlarged detailed view of a C portion of FIG.

5A and 5B are views showing the action of the submersible press-fitting machine of the present invention, showing a state in which the movable part has moved forward, FIG. 5A is a plan view, and FIG. 5B is a front view of FIG.

FIG. 6 is a view showing a different action of the underwater press-fitting machine of the present invention from that of FIG. 5, and showing a state in which the movable portion is tilted forward and downward.

FIG. 7 is a view showing a different action of the underwater press-fitting machine of the present invention from FIGS. 5 and 6, and showing a state in which the movable portion is tilted backward.

[Explanation of symbols]

1 Submersible press machine 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 2
J Steel pipe 3 Fixed part 4 Movable part 5 Fixed frame 5a, 5b Groove 6 Forward / backward frame 6a, 6b Flange parts 7A, 7B, 7C, 7D Hard rubber plate 8 Countersunk screw 9 Front and rear cylinders 10A, 10B, 10C Holding parts 10a, 10b Cylinder 11 Claw 12 Shaft 13 Depression Frame 14 Depression Cylinder 15A, 15B, 15C Hard Rubber Plates 16A, 16B Press-fit Cylinder 17 Press-fit Frames 18A, 18B Arm 20 Front Frame 21 Press-fit Chuck 21a Claw

Claims (3)

[Claims] 1. A fixed part mounted on a plurality of existing piles adjacent to each other via a holding part and having an advancing / retreating guide part formed on an upper part thereof, and an advancing / retreating slide part on the advancing / retreating guide part of the fixing part. It is a movable part that is fitted and moved back and forth by an actuator, and in this movable part, a lifting guide part and a pile that is vertically fitted to this lifting guide part and is additionally press-fitted into the existing pile at a predetermined interval. In a submersible press-fitting machine equipped with a gripping part that is gripped by hydraulic pressure and a press-fitting actuator that raises and lowers the gripping part, a hard rubber that fits between the advancing / retreating sliding part and the ascending / descending sliding part is made into the advancing / retreating guide part and the ascending / descending guide part. Underwater press-fitting machine characterized by being inserted into. 2. The elevating / lowering guide portion is composed of an advancing / retreating frame having the advancing / retreating sliding portion, and a depression / elevation frame connected to the advancing / retreating frame via a pin and an elevation / elevation actuator. The underwater press fitting machine according to 1. 3. The anti-corrosion coating is applied to the surfaces of the advancing / retreating sliding part and the elevating / lowering sliding part.
Alternatively, the underwater press fitting machine according to claim 2.