JP7522027B2 - Wood pile head cutting device - Google Patents

Description

The present invention relates to a wooden pile head cutting device for horizontally cutting the heads of wooden piles used, for example, in the foundations of houses, and adjusting the height of the pile heads.

In recent years, environmentally friendly wooden piles that do not emit CO2 have come to be used for the foundations of small houses.
In addition, not only wooden piles but any other piles that remain high during driving require pile head treatment. In the case of wooden piles, it is common to cut the pile head horizontally at a specified depth and adjust the height of the pile head.

The wooden stakes are cut using tools such as chainsaws.
In order to cut the pile head horizontally at a specified depth, the tool blade must be placed horizontally on the wooden pile, and the ground around the wooden pile must be excavated to create a working space for this. This creates the following problems:
(1) Excavating the ground around the wooden piles may disturb the ground, resulting in the specified bearing capacity being lost.
(2) Excavation of the ground and cutting of wooden piles require work machinery and workers, which increases the construction time and costs.

The present invention aims to provide a wooden pile head cutting device that can easily adjust the head height of a wooden pile.

The first invention of the present application, made to achieve the above-mentioned object, provides a wooden pile head cutting device for horizontally cutting the head of a wooden pile, comprising a cylindrical main body with at least the lower end open and a larger diameter than the wooden pile, a cutting plate fixed inside the main body, and a connecting part fixed to the upper end of the main body and connecting to a rotating shaft of a rotary press or ground improvement machine or the like, wherein the cutting plate is inclined downward and has a horizontal cutting blade at its lower end.
The second invention of the present application provides a wooden pile head cutting device, characterized in that in the wooden pile head cutting device of the first invention, it has a fixed plate fixed horizontally inside the main body, the fixed plate is a disk with the same shape as the inner diameter of the main body and has a fan-shaped cutout in part, the cutting plate is a fan shape approximately the same as the notch in the fixed plate, an arc is fixed to the inner circumference of the main body so as to cover the notch in a plan view, and the cutting blade is provided on one of the radius parts located below.
The third invention of the present application provides a wood pile head cutting device according to the first or second invention, characterized in that the main body has a discharge hole on the outer periphery above the cutting plate.

The present invention provides at least one of the following effects by solving the above-mentioned problems.
(1) The main body is a cylinder with an open bottom, so the wooden pile head cutting device can be pushed down to penetrate into the ground without disturbing the ground around the wooden pile.
(2) The height of the pile head can be easily adjusted using a rotary pressing machine or soil improvement machine, etc., so the construction period is short and construction costs are not high.

FIG. 1 is an explanatory diagram of the wooden pile head cutting device of the present invention. Illustration of the fixed plate and cutting plate FIG. 1 is an explanatory diagram of the use of the wood pile head cutting device of the present invention; FIG. 2 is an explanatory diagram of the use state of the wooden pile head cutting device of the present invention.

The following describes an embodiment of the present invention with reference to the drawings.

<1> Overall configuration of the wood pile head cutting device The wood pile head cutting device of the present invention has a cylindrical main body 1, a fixing plate 2 and a cutting plate 3 fixed inside the main body 1, and a connecting part 4 fixed to the upper end of the main body 1 (Figure 1).

<2> Body The body 1 is a cylindrical steel pipe with an open lower end and a sealed upper end.
A fixed plate 2 and a cutting plate 3 are fixed inside the main body 1 by welding or the like.
A discharge hole 11 is provided on the outer periphery of the main body 1 above the fixed plate 2 and the cutting plate 3.
The diameter of the main body 1 is made larger than that of the wooden pile whose head is to be cut.

<3> Fixing plate, cutting plate The fixing plate 2 is a disk with the same shape as the inner diameter of the main body 1, and has a sector-shaped cutout 21 in one part (Fig. 2). The outer periphery excluding the cutout 21 is fixed to the inner periphery of the main body 1 in a horizontal position.
The cutting plate 3 has a sector shape that is substantially the same as the notch 21 of the fixed plate 2, and a cutting blade 31 is provided on one radius portion.
The cutting blade 31 may be formed by forming an acute angle at the end of the cutting plate 3, or may be a separate body from the cutting plate 3 and fixed to the cutting plate 3. If the cutting blade 31 is a separate body from the cutting plate 3, it can be replaced when the cutting blade 31 deteriorates.
The cutting plate 3 is fixed to the inner circumference of the main body 1 in an arc so as to close the notch 21 in a plan view with the cutting blade 31 tilted downward so that the cutting blade 31 faces downward. At this time, the cutting plate 3 is arranged so that the cutting blade 31 is horizontal.

<4> Connecting section The wooden pile head cutting device of the present invention is used by connecting the connecting section 4 to the lower end of the rotating shaft of a rotary press machine, soil improvement machine or the like (not shown).
In this embodiment, the connecting portion 4 at the top of the main body 1 is a cylindrical steel pipe, but any suitable shape may be selected as long as it can be connected to the rotating shaft of a rotary press or soil improvement machine.

<5> Cutting the pile head using a wooden pile head cutting device The main body 1 of the wooden pile head cutting device attached to the lower end of the rotating shaft of a rotary press or soil improvement machine is placed so as to cover the pile head of the wooden pile 5 that has been raised up high. Since the main body 1 is a cylinder with an open bottom, it can be pushed down on the wooden pile head cutting device to penetrate into the ground, without disturbing the ground around the wooden pile 5.
Then, by rotating and pushing down the wooden pile head cutting device with the horizontal cutting blade 31 in contact with the top end of the wooden pile, the head of the wooden pile 5 can be cut horizontally (Figure 3). The height of the pile head can be easily adjusted using a rotary press or soil improvement machine, so the construction period is short and the construction costs are not high.

As it is further rotated and pushed down, the part of the cutting blade 31 outside the wooden pile reaches the ground, but the soil in the ground is lifted by the cutting blade 31 together with the cutting chips of the wooden pile 5 and stored in the space S above the fixed plate 2 inside the main body 1 (Figure 4). Once the pile head height adjustment is complete, the wooden pile head cutting device is lifted as is, and the unnecessary cutting chips and soil are removed while still supported by the fixed plate 2 and positioned in the space S inside the wooden pile head cutting device. The cutting chips and soil inside the main body 1 can be discharged from the discharge hole 11 provided in the main body 1.

1... Main body, 11... Discharge hole 2... Fixing plate 3... Cutting plate, 31... Cutting blade 4... Connecting part 5... Wooden stake

Claims (3)

A wooden pile head cutting device for horizontally cutting the head of a wooden pile,
A cylindrical body having a diameter larger than that of the wooden stake, with at least a lower end open;
A cutting plate fixed inside the body;
A connecting portion is fixed to the upper end of the main body and connected to a rotating shaft of a rotary press or a ground improvement machine,
The cutting plate is inclined downward and has a horizontal cutting blade at its lower end.
Wood pile head cutting equipment. The wooden pile head cutting device according to claim 1,
A fixing plate is horizontally fixed inside the main body,
The fixing plate is a disk having the same shape as the inner diameter of the main body and has a sector-shaped notch in a part thereof,
The cutting plate has a sector shape substantially the same as the notch of the fixed plate, an arc is fixed to the inner circumference of the main body so as to close the notch in a plan view, and the cutting blade is provided on one of the radial portions located below.
Wood pile head cutting equipment. The wooden pile head cutting device according to claim 1 or 2,
The main body has a drain hole on the outer periphery above the cutting plate.
Wood pile head cutting equipment.

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