JPH0516281Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a device for scraping mud from steel sheet piles that is useful when installed in a self-propelled static load type pile press-in/extraction machine. This device can automatically scrape off mud adhering to the recesses of sheet piles during the normal pulling process.

Conventional technology A conventional self-propelled static load type pile press-in/extraction machine is equipped with an existing pile clamp below a foundation that is placed on an existing pile, and a press-in/extraction machine body is erected above the foundation. An elevating body is provided on the side of the main body of the pulling machine, which is raised and lowered by a cylinder device, and a pivotable pile gripping device is installed on this elevating body, and is used to drive or pull out steel sheet piles. It is configured. During the work, the cylinder device is activated to raise or lower the elevating body while taking the reaction force using the existing pile clamp, and the steel sheet pile is forcefully chucked by the pile gripping device and press-fitted or pulled out.

Problems that the invention aims to solve However, with such conventional pile press-in and pull-out machines, a large amount of mud adheres to the recesses of the steel sheet pile during work, especially when pulling out piles, making it difficult to carry out the pull-out work smoothly. There was a problem. That is, since the steel sheet pile has a substantially concave cross section, mud adheres to the concave portion, and when the pile is pulled out, the pile is pulled out with the mud still attached to the concave portion. In the pile pulling operation, after pulling out one stroke of the cylinder, the chuck of the pile gripping device is released, the cylinder is lowered, and the steel sheet pile is chucked again by the pile gripping device to raise the cylinder, which is repeated and pulled out. The chuck portion has a notched hole shape corresponding to the steel sheet pile, and the steel sheet pile passes through the notched hole when the cylinder is lowered. Therefore, when the cylinder is lowered after being withdrawn by one stroke of the cylinder, the notch hole in the chuck portion becomes clogged with mud adhering to the recessed portion of the steel sheet pile, causing an obstacle to the lowering. Especially when pulling out steel sheet piles that have been buried for a long time, or when the soil is viscous, mud tends to adhere. Therefore, during work, after the cylinder has been pulled out for one stroke, the worker uses a shovel to scrape off the mud adhering to the recesses of the steel sheet pile, and then releases the chuck on the pile gripping device to drive the cylinder downward. Then, the steel sheet piles have to be chucked and pulled out again, and the tedious work of manually scraping off the mud after each cylinder stroke is required. Therefore, there are problems in that the operation becomes more complicated and the work efficiency is lowered, which delays the construction period.In addition, there are other problems such as accelerated wear of chuck pawls due to muddy soil. Therefore, the present invention eliminates the problems that conventional pile press-in and pull-out machines have, as described above, and removes mud adhering to the recesses of steel sheet piles.
The object of the present invention is to provide a device that can automatically scrape off during a normal drawing process without requiring manual labor.

Means for Solving the Problems In order to achieve the above object, the present invention provides a pile press-in/extraction machine having the above configuration, in which a guide pin movable in the direction of the steel sheet pile is inserted and supported at the lower end of the pile gripping device. Then, a retaining arm protruding from the guide pin is removably fitted into a guide pin retaining plate protruding from one end of the scraper, which is provided with a scraping plate and a guide plate that come into contact with the mud. Provided is a device for scraping off mud from steel sheet piles in a press-in drawing machine.

Function According to the above device, when the steel sheet pile chucked by the pile gripping device due to the vertical movement of the elevating body by the cylinder device completes the pulling operation of one stroke of the cylinder device, the chuck force on the steel sheet pile is released. Then, the pile gripping device is lowered by the lowering drive of the cylinder device.

Then, the lowest end of the guide plate of the scraper comes into contact with the mud adhered to the recess of the steel sheet pile, and as the pile gripping device continues to descend, the scraper moves along with the guide pin in the direction of the steel sheet pile, removing the mud. A reaction force is applied from the guide plate to the scraper plate, and the scraper plate is pressed against the surface of the recessed portion of the steel sheet pile, and the mud adhering to the scraper plate is scraped off by the downward movement of the pile gripping device. When the downward drive of the cylinder device is completed, the chuck mechanism of the pile gripping device is operated again to chuck the steel sheet pile and continue the pulling operation of the steel sheet pile.

Embodiment An embodiment of the present invention will be described below based on the drawings. FIG. 1 is a side view of a pile press-in/extraction machine equipped with a mud scraping device according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof. 1 in the diagram is the existing pile 2
An existing pile clamp 3 is provided below the base 1, which is a base that is placed on top of the base. A press-in/extractor main body 4 is erected above the base 1 and is movable up and down by a cylinder 5. An elevating body 6 and a cylinder device 7 are provided on the sides of this press-in/extractor main body 4.
The elevating body 6 is configured to be able to move up and down. A rotatable pile gripping device 8 is provided below the elevating body 6, and is configured to be able to drive or pull out a steel sheet pile 9. On the other hand, a guide pin 10 is movably inserted through the lower end of the pile gripping device 8, and a scraper 11 is attached to the guide pin 10, which is detachable. That is, as shown enlarged in FIGS. 4 and 5, a guide pin retaining plate 13 has a retaining arm 12 projecting from the guide pin 10, and the retaining arm 12 protruding from one end of the scraper 11. By fitting the scraper 11 to the guide pin 10, the scraper 11 is removably attached to the guide pin 10. The scraper 11 is provided with a scraper plate 11a and a guide plate 11b, and is configured to be movable in the vertical direction of the steel sheet pile 9 together with the guide pin 10.

The operation of the steel sheet pile mud scraping device having the above configuration will be described below. That is, as shown in FIG. 6, the pile gripping device 8 is penetrated with a cutout hole 14 that approximately corresponds to the shape of the steel sheet pile 9, and the steel sheet pile 9 is inserted into the notch hole 14 and the pile gripping device 8 is inserted into the pile gripping device 8. The chuck mechanism included in the device provides a strong chuck,
The cylinder device 7 is driven to pull out the steel sheet pile 9. As mentioned above, during the above work, the mud 15 shown in FIG. 7 tends to adhere to the recessed portion of the steel sheet pile 9, and the mud 15 is easily deposited in response to the pulling operation of the steel sheet pile 9.
5 will also rise. On the other hand, when one stroke of the pulling operation of the cylinder device 7 is completed, the chuck force of the pile gripping device is released and the pile gripping device 8 is lowered by the downward drive of the cylinder device 7. Then, the lowest end of the guide plate 11b located at the lower end of the pile gripping device 8 comes into contact with the mud 15, and when the pile gripping device 8 continues the downward movement shown in A in FIG.
A reaction force B of 5 is applied to the guide plate 11b, and a horizontal holding force C corresponding to the inclination of the guide plate 11b is generated to push the scraper 11 toward the guide pin 10.
At the same time, it is moved in the direction of the steel sheet pile 9. Therefore, the scraper plate 11a at the tip of the scraper 11 is pressed against the surface of the concave portion of the steel sheet pile 9, and as the pile gripping device 8 moves downward, the scraper plate 11a is pressed against the muddy soil 15.
can be scraped off. When the descending drive of the cylinder device 7 is completed, the chuck mechanism of the pile gripping device 8 is operated again to chuck the steel sheet pile 9 and perform a pulling operation, and when the pile gripping device is lowered, the mud is scraped off. The steel sheet pile pulling operation can be continued by repeating the same operation. Since the scraper 11 is removably attached to the guide pin 10, it is sufficient to attach the scraper 11 when pulling out the pile and remove it when press-fitting the pile. When the scraper 11 is installed, as explained in the above operation, simply by lowering the pile gripping device 8, the scraper plate 11a at the tip of the scraper 11 approaches the steel sheet pile 9 from the vertical direction, and It brings about the effect of alienation.

Effects of the Invention As explained above, in the present invention, a guide pin that is movable in the direction of the steel sheet pile is inserted into and supported at the lower end of the pile gripping device, and a retaining arm protruding from the guide pin is brought into contact with the mud. By removably fitting the guide pin stopper plate protruding from one end of the scraper provided with a scraper plate and a guide plate, steel sheet piles can be pulled out by the lifting and lowering movement of the elevating body attached to the puller body. During operation, as mud comes into contact with the guide plate of the scraper, the scraper moves in the direction of the steel sheet pile together with the guide pin, and the scraping board is pressed against the recessed surface of the steel sheet pile and automatically removes the mud attached to the steel sheet pile. You can scrape it off. Therefore, the mud can be removed without bothering the worker to scrape off the mud, and work efficiency can be improved. Therefore, it is possible to shorten the construction period and have a great effect of reducing construction costs. Furthermore, since the chuck mechanism in the pile gripping device is operated without mud adhering to the surface of the steel sheet pile, it prevents wear of the chuck claws caused by mud and extends the service life of the device. This provides a device with high practical value.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the basic configuration of a pile press-in/extraction machine to which the present invention is applied, Fig. 2 is a plan view of the same, Fig. 3 is a front view of the same, and Fig. 4 is a mud scraping device based on the present invention. 5 is a front view of the same, FIG. 6 is a plan sectional view of the same, and FIGS. 7 and 8 are front views illustrating the operation of the device of the present invention. 1...Foundation, 2...Existing pile, 3...Existing pile clamp, 4...Press-in/extraction machine body, 6...Elevating body, 7
... Cylinder device, 8 ... Pile gripping device, 9 ... Steel sheet pile, 10 ... Guide pin, 11 ... Scraper, 11a ... Scraping board, 11b ... Guide plate, 12
...Keeping arm, 13...Guide pin stopper plate, 14...Notch hole, 15...Mud.

Claims (1)

[Scope of Claim for Utility Model Registration] A pile press-in and pull-out machine body disposed above a base having a clamping device for existing piles, an elevating body attached to the side of the pile press-in and pull-out machine body so that it can be raised and lowered, and the lift In a pile press-in/extraction machine that has a cylinder device for raising and lowering a body and a pile gripping device installed below the lifting body, a guide pin movable in the direction of the steel sheet pile is inserted and supported at the lower end of the pile gripping device. , a retaining arm protruding from the guide pin is removably fitted into a guide pin retaining plate protruding from one end of the scraper, which is provided with a scraping plate and a guide plate that come into contact with the mud. A device for scraping off mud from steel sheet piles using a pile press-in/extraction machine.