JP2544759Y2 - Rotation reaction force removal device for casing driver - Google Patents

Description

[Detailed description of the invention] [Industrial applications]

The present invention relates to a rotary reaction force removing device installed in a casing driver for press-fitting and pulling out a casing of a large-diameter steel pipe pile or a steel pipe used for construction and foundation work of civil engineering.

[Prior art]

When a large diameter steel pipe pile or a steel pipe casing is pressed into the ground or pulled out from the ground by a casing driver, the casing driver applies a rotational force to the casing described above. Generates a rotational reaction force. As a method for taking this rotational reaction force, there is a method described in Japanese Utility Model Laid-Open No. 61-84738. In this conventional technique, a hydraulic jack is vertically attached to the tip of an arm member extending from both sides of a crawler frame of a work machine while avoiding a band, and the hydraulic jack is pressed against a base frame of a casing driver. , So that the weight of the working machine is applied to the casing driver to support the rotational reaction force. Further, as described in Japanese Patent Application Laid-Open No. 61-137919, there is a method of pulling out a pile by using a weight of a crawler crane or the like.

[Problems to be solved by the invention]

In recent years, with the rise in land prices, in order to effectively install buildings and civil works on the premises, it is required to arrange a part of the buildings and civil works at the very end of the premises. However, if there is a partition wall or the like at the corner of the site, it is difficult to meet the demands. In the above-described conventional technology, the reaction force receiving devices are juxtaposed to the side of the casing driver, so that the dimension of the casing driver in the width direction increases.
For this reason, the casing driver cannot be installed just at the corner of the site, so that the casing cannot be installed just at the corner of the site. The present invention has been made in view of the above-mentioned problems, and has a casing driver that can press-fit a casing such as a steel pipe pile or a steel pipe into the ground, or pull it out of the ground, particularly at a corner of the premises. It is an object to provide a reaction force removing device.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a casing driver for press-fitting or pulling out a casing used for construction and civil engineering foundation work from the ground, or for removing a reaction force generated during work. In the apparatus provided with a rotational reaction force removing device, a beam having a width smaller than the width of the casing driver is swingably and detachably provided on at least one side of the casing driver body of the casing driver, and the casing driver body and Driving means for swinging the beam in a plane substantially perpendicular to the rotation axis of the casing driver is provided between the beam and an intermediate portion of the beam, and a rotating reaction force supporting object is provided at the other end of the beam. It is characterized in that a bracket is detachably provided so as to face the reaction force receiving portion in contact with the reaction force receiving portion.

[Action]

Since the beam having the reaction force receiving portion and having a width smaller than the width of the casing driver is extended to at least one side of the casing driver main body, the casing driver main body can be installed at the very end of the site. As a result, a casing such as a steel pipe pile or a steel pipe serving as a foundation for construction and civil engineering can be constructed on the boundary side of the site. Also, since the beam can be swung in a plane substantially orthogonal to the rotation axis of the casing driver by the driving means,
It is easy to make the reaction force receiving portion abut against the reaction force supporting object.

【Example】

Hereinafter, an embodiment of the present invention will be described more specifically with reference to FIGS. 1 and 2. FIG. FIG. 1 is a front view of a casing driver to which a rotary reaction force removing device according to the present invention is attached, and FIG. 2 is a plan view thereof. Press-fit casing 1,
The casing driver main body 2 for pulling out can be moved up and down along a base frame 3 whose level is adjusted to a horizontal position by a jack cylinder 12 and guide posts 4 erected at four corners of the base frame 3.
The rotary drive device 5 is moved up and down by a thrust cylinder 11 having a base end attached thereto, and a band device 9 mounted on the rotation side of the rotary drive device 5. The rotary drive device 5 includes a slewing bearing 6 with external teeth,
The band device 9 is composed of a pinion 7 for rotating the slewing bearing 6 and a hydraulic motor 8 with a planetary reducer for driving the slewing bearing 7. . Further, the casing 1 is chucked and opened by a band cylinder 10 attached to the band device 9. The rotation reaction force removing device 20 includes a beam 23 having a base side swingably attached to the base frame 3 by a vertical pin 21 and having a reaction force receiving portion 23a at a tip end for receiving a rotation reaction force in one direction; Halfway and the base frame 3
And a hydraulic cylinder 24 attached by pins 22 and 25 to the reaction force receiving portion 23a, and a reaction force receiving bracket fixed to the tip of the beam 23 by pins 27 and 28. 26. Thus, a crawler 29 as a rotational reaction force supporting object is provided at the tip of the beam 23 by the reaction force receiving portion 23a and the bracket 26.
A fork-like reaction force receiving portion is formed. The rotational reaction force removing device 20 configured as described above is disposed symmetrically with respect to the casing driver main body 2. The casing 1 is chucked by the band cylinder 10 of the band device 9. When the hydraulic motor 8 with the planetary reduction gear attached to the rotation drive device 5 is driven, the rotation of the pinion 7 causes the rotation bearing 6 with external teeth to rotate.
Accordingly, the band device 9 fixed on the outer race of the slewing bearing 6 rotates. When the thrust cylinder 11 is reduced, the rotation drive device 5 moves down along the guide post 4. When the casing 1 starts rotating while cutting into the ground, it is necessary to support a reaction force against the rotating excavation force. Therefore, first, guide post 4
And transmitted to the base frame 3, the base frame 3
To the rotational reaction force removing device 20 via pins 21 and 22 connecting the brackets 5a and 5b provided at two places on the left and right sides and the connection fixing portions 23a and 24a provided on the rotation reaction force removing device 20 side. Tell The rotary reaction force removal device 20 is a fork-like reaction device formed by a reaction force receiving portion 23a at the tip of a beam 23 and a reaction force receiving bracket 26 to form a crawler 29 of a middle excavator for excavating earth and sand in the casing 1. Since it is sandwiched between the force receiving portions, the rotational reaction force generated in the casing driver main body 2 can be supported as long as the crawler 29 of the inside excavator does not slide. Therefore, as compared with the conventional method in which a beam is attached around the casing driver main body 2 and a weight is placed thereon to take a rotational reaction force, the load point is farther from the excavation center, so that the tangential force becomes smaller, and It can sufficiently support the frictional force with the ground due to its own weight. Normally, when the crawler 29 is sandwiched between the fork-shaped reaction force receiving portions, it is only necessary to insert wood in the meantime to avoid damage to the crawler 29. When the crawler 29 is inserted into the fork-shaped reaction force receiving portion, it is time-consuming to run the excavator while switching the crawler 29 in the traveling direction several times. Therefore, in the case of the present embodiment, first, the pin 28 to which the bracket 26 is attached is removed, and the bracket 26 is rotated about the pin 27 in the direction of the arrow. Next, the hydraulic cylinder 24 is extended to rotate the beam 23 about the pin 21, and the beam 23
The tip of the reaction force receiving portion 23a is applied to the crawler 29. At this time,
Even when wood is inserted between the two, it can be fixed without any gap. Then put back the bracket 26,
28 is inserted and fixed to the beam 23. At this time, the bracket
Although wood is similarly peeled between the crawler 26 and the crawler 29, since the bracket 26 can be easily moved by hand, it is easy to insert wood having an appropriate thickness so as not to form a gap. As described above, since the crawler 29 is sandwiched between the fork-shaped reaction force receiving portions at the tip of the beam 23, not only a rotational reaction force in one direction, but also a swing type casing driver that repeats normal rotation and reverse rotation. Applicable. In the case of installing a steel tower foundation in a mountainous area with the present casing driver, a fixed crane mounted on a gantry, instead of a crawler-type mid-boring excavator, may be attached with a hammer crab. In this case, it is necessary to apply the tip of the beam 23 to the gantry leg in order to take the rotational reaction force. However, in the present invention, the casing driver main body 2 is first installed at a predetermined excavation position, the hydraulic cylinder 24 is extended, and the above-described crawler 29 is inserted. The part can be applied to the leg of the gantry, and the rotation reaction force can be supported. The same applies to the case where a standing tree is inserted. Generally, when the supporting object is a fixed object, it takes a lot of time to install the casing driver main body 2 at the excavation position. In the method of rotating, since the installation work and the work for fixing to the reaction force supporting object can be performed separately, the work efficiency is improved with certainty. In addition, when constructing near the site boundary, only one side of the two crawlers constituting the middle excavator needs to be in contact, so that the excavator body can be separated from the boundary by abutting the crawler on the boundary side. In addition, the size of the excavator is not limited by the size of the casing driver, and does not hinder the construction at the site boundary. In addition, in the corner of the site, due to the work space, the rotation reaction force removing device 20 is provided only on one surface side of the casing driver main body 2, so that steel pipes and the like are constructed near the boundary of the site. Can be. Further, as shown in this embodiment,
It may be provided at a symmetrical position with respect to the casing driver main body 2 for the purpose of offsetting the tangential force and reducing the working radius of the boring excavator.

[Effect of the invention]

As described above, according to the present invention, the casing driver body can be installed at the boundary of the site, so that a casing such as a steel pipe pile or a steel pipe can be installed at a position near the boundary of the site. it can. As a result, construction and civil engineering can be effectively installed on the site, contributing to the effective use of land. Further, since the beam can be swung by a driving means in a plane substantially perpendicular to the axis of the casing driver, when the beam is brought into contact with the reaction force supporting object, the beam is not moved largely. It is possible to improve the workability.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a front view of a casing driver to which a rotary reaction force removing device is attached, and FIG. 2 is a plan view thereof.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-61-137919 (JP, U) JP-A-61-84738 (JP, U) JP-A-61-84737 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] A casing driver for press-fitting or pulling out a casing used for foundation work of a building or civil engineering from the ground, or a rotary reaction force removing device for removing a reaction force generated at the time of work is provided in a casing driver. A beam having a width smaller than the width of the casing driver is provided on at least one side of the casing driver main body of the casing driver in a swingable and detachable manner, between the casing driver main body and an intermediate portion of the beam. A driving means for oscillating the beam in a plane substantially orthogonal to the rotation axis of the casing driver, a reaction force receiving portion abutting on a rotational reaction force supporting object at the other end of the beam, A rotating reaction force removing device for a casing driver, wherein a bracket is detachably provided so as to face the reaction force receiving portion. 2. The device according to claim 1, wherein said reaction force receiving portion provided at the other end of said beam is formed in a fork shape.