JPH06336749A - Ditch excavation method by chain cutter system - Google Patents

Abstract

PURPOSE:To enable excavation while preventing the scatter of excavated earth to the neighborhood for ditch excavation by a chain cutter system. CONSTITUTION:A pair of endless chains 10A and 10B are arranged around a bearing body 4 in parallel at a specific interval, at the same time, a connecting material provided with an excavating edge connects between adjacent endless chains 10A and 10B, sprockets 7A and 7B wrapped with the endless chains 10A and 10B are driven and rotated, and they are synchronized to move. The endless chains 10A and 10B are moved by a ditch excavator constituted in such a way, and in the case a ditch having approximately a rectangular cross section is excavated, excavation is made while moving the endless chains 10A and 10B alternately in forward and reverse directions so that excavated earth is kept in the range not getting over the top sprockets 7A and 7B of the bearing body 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for grooving by a chain cutter method while preventing the earth and sand excavated by the chain cutter from being scattered around.

[0002]

2. Description of the Related Art In a chain cutter type excavator, a guide post 2 is erected on a moving vehicle 1 such as a crawler as shown in FIG. 1, and a plate is provided along the guide post 2 with a slider 3 interposed therebetween. 2 is provided movably, and as shown in FIG. 2, corner sprockets 5A, 5B, 6A, 6B are provided on the top of the lower corners of the support 4 as shown in FIG. The drive sprockets 7A and 7B have guide sprocket wheels 8A, 8B, 9A and 9B pivotally supported at the upper corners.

An endless chain 10A is wound around each sprocket of the A system, and an endless chain 10B is wound around each sprocket of the B system, and a pair of the endless chains 10A and 10B arranged in parallel is connected to each other. A connecting member 12 having a drilling blade 11 is provided.

In actual trench excavation, the support 4 is pushed into the ground while rotating the endless chains 10A and 19B in the circumferential direction. In this case, the rotation direction of the chain cutter may be either forward or reverse,
Usually, excavation is performed by rotating in a certain direction.

[0005]

At this time, the cutting blade bit 11 attached to the endless chains 10A and 10B.
The earth and sand adhering to the surface rises to the drive unit sprockets 7A and 7B as the chain rotates, and after passing through the drive unit sprockets 7A and 7B, falls due to vibration and centrifugal force or gravity. In addition, when excavating, in order to improve excavation efficiency, groove wall stability, strength of earth retaining wall, and improvement of water stoppage,
Cement-based slurry, etc. may be used together during excavation, but there was an environmental problem such as the mud that dropped at this time landed and scattered in all directions. In addition, this mud scattering becomes a big problem when it is installed near an existing building.

[0006] It is conceivable to cover and cover the entire chain cutter as a measure for preventing the scattering of soil and mud, but if the chain cutter is attached integrally to the supporting body, the scattering preventing cover also covers the ground of the supporting body 4. Since it goes into the ground when it is inserted, it becomes a very large resistor when it is inserted and is not a method that can be actually adopted. In addition, if a separate shatterproof cover is installed separately from the excavator and installed around it, the structure of this shatterproof cover will become very large and will hinder construction, so this method is also desirable. Not a thing.

Therefore, an object of the present invention is to provide an effective and practical method for excavating a groove by the chain cutter method while preventing the earth and sand excavated by the chain cutter from scattering around. Is provided.

[0008]

[Means for Solving the Problems] The above problem is to provide an endless chain having a cutting blade around a support,
Using a grooving machine configured to move the endless chain in the circumferential direction by drivingly rotating a sprocket wound with this endless chain, when excavating a groove having a substantially rectangular cross section in the ground vertical direction, This can be solved by excavating the endless chain in the grooving machine while alternately moving in the forward and reverse directions within a range in which the excavated earth and sand do not go over the top of the support.

[0009]

In the present invention, the endless chain of the chain cutter is not moved in a fixed direction, and the excavated earth and sand are alternately moved in the forward and reverse directions to the extent that the excavated earth and sand do not ride over the top of the support. To do. Therefore, the earth and sand excavated and attached to the cutting blade and carried to the ground are vibrated by the sudden reversal of the moving direction of the endless chain, and are separated downward from there, so they are skipped and scattered around as before. There is nothing to do.

In this case, in particular, when the forward and reverse rotations of the endless chain are performed at very short intervals, the earth and sand adhering to the cutting blade can be efficiently separated due to the continuously applied vibration.
It is possible to excavate a groove without significantly lowering the drilling efficiency.

[0011]

The present invention will be described below in more detail with reference to the accompanying drawings. First, FIGS. 1 to 8 show an example of the device of the present invention, in which a guide post 2 is erected on a moving vehicle 1 such as a crawler. A plate-shaped support member 4 having a vertically long house shape is provided along the guide post 2 via a slider 3 so as to be movable in the direction opposite to the ground. The central portion of the support body 4 is a cutout portion 4a.

Corner sprocket wheels 5A, 5B, 6A and 6B are provided at both lower corners of the support 4, drive sprockets 7A and 7B are provided at the top, and guide sprockets 8A, 8B, 9A and 9B are provided at the upper corners. Each is pivotally supported.
Endless chain 10A on each sprocket of these A systems
However, the endless chain 10B is wound around each sprocket of the B system.

A connecting member 12 having an excavating blade 11 is provided by connecting a pair of these endless chains 10A and 10B arranged in parallel. In the embodiment, as shown in detail in FIGS. 5 and 6, the connecting members 12 are laid across the link plates, and the cutting blades 11 are spaced apart along the longitudinal direction of one connecting member 12. It is projected. Further, the arrangement mode of the four cutting blades 11 is such that, as clearly shown in FIG. 6, the cutting blades 11 are arranged in a staggered manner between the adjacent connecting members 12 and 12. The group of excavating blades 11, 11 ... Has a width corresponding to the length of.

Further, with respect to the moving direction of the chains 10A, 10B, a non-excavation blade region L having a length larger than the width W of the sheet P and having no connecting member 12 is secured.

On the other hand, the drive sprockets 7A and 7B are connected to the hydraulic motor 13 which is fixed to the support 4 and constitutes the drive means of the present invention, whereby the endless chains 10A and 10B are synchronized. It is designed to move.

On the other hand, as shown in FIG. 2, a sheet-like body P such as a concrete panel is provided with chucks 14a, 1 of chuck cylinders 14, 14 fixed to a support 4.
It is gripped by 4a. 15 is each endless chain 10
It is a protective fence against movement of A and 10B.

As clearly shown in FIGS. 3-8,
Corner sprockets 5A, 5B, 6 pivotally supported by the support 4
Disk-shaped cutting rotor 1 outside the shaft that holds A and 6B
6A, 16B, 17A and 17B are integrated. Cutting bits 18 are integrated around the respective cutting rotors at intervals. As shown in FIG.
Each cutting rotor 16A, 16 having a cutting bit 18
Since B, 17A, and 17B are positioned so as to project outward from the endless chains 10A and 10B, they are responsible for cutting the portion outside the cutting region of the endless chains 10A and 10B.

In the apparatus constructed as described above, the sheet P is arranged between the endless chains 10A and 10B, and the lower end of the sheet P is the downward movement path of the connecting member 12, that is, the movement of the endless chain. Located above the bottom of the road,
The upper end portion is gripped by the chucks 14a, 14a of the chuck cylinders 14, 14. In such a state, the excavator moves the endless chains 10A, 10B while pressing the slider 3 downwardly to forcibly drive the slider 3 or by the self-weight of the excavator, and the cutting rotors 16A, 16B, 17A, 17B. While rotating the, excavation of trenches is performed.

In the groove excavation by the chain cutter according to the present invention, the moving direction of the endless chains 10A, 10B is not limited to a fixed direction, but the excavated earth and sand is the top sprockets 7A, 7B of the support 4. Excavation is performed while alternately moving in the forward and reverse directions within the range that does not get over. In this case, it is preferable to alternately move the endless chains 10A and 10B in the forward and reverse directions within a range in which the ground clearance h at which the excavated earth and sand is raised is set to 1 to 2 m. By moving in the forward and reverse directions at short intervals, the endless portions 10A and 10B are constantly vibrated, the adhered earth and sand are easily separated from the cutting blade 12, and the excavation efficiency is not lowered,
Ditch excavation can be performed.

The final stage of excavation, the top sprocket 7
If the positions of A and 7B are several meters from the ground, preferably 1 to 2 meters, even if the earth and sand adhering to the cutting blade 12 moves over the top sprocket 7A and 7B, the earth and sand are scattered to the surroundings. Since there is no endless chain 10A,
10B may be moved in a fixed direction.

In accordance with the above procedure, as shown in FIG. 10, excavation having a substantially rectangular cross section (this excavation area is indicated by reference numeral Z) is performed to a predetermined depth. At this time, the sheet P is simultaneously inserted into the excavated portion.

When the excavation and the insertion of the sheet P are completed, the endless chains 10A and 10B are moved to bring the endless blade region L to the lower end. Then
Chuck cylinders 14, 14 chucks 14a, 1
The holding of the planar body P by 4a is released, the wire 19 is wound by the winding winch 20, and only the excavation device is pulled up and removed from the ground. In this process, the sheet P relatively passes through the non-excavation blade region L, so that it is left as it is in the ground as shown in FIG.

When constructing the non-excavation blade area L, it is constructed in advance as described above, and is also constructed by removing the connecting members 12 ... May be.

On the other hand, in the case of a continuous wall, as shown in FIG. 11, the ends are wrapped (the wrap range is indicated by R).
New excavation Zn is performed and the adjacent planar body Pn is inserted. In this case, excavation and insertion of the planar body Pn can be performed using the existing planar body P as a guide. Further, if necessary, as shown in FIG. 12, the stress material 21 such as H-shaped steel is hung and inserted into the lap portion R as it is, or is press-fitted by an appropriate means. In addition, a pressure-feeding pipe (not shown) of the cement-based material is previously arranged along the longitudinal direction of the support body 4, and the cement-based material is discharged through the pressure-feeding pipe during the excavation process,
The soil cement solidified body may be formed in the excavated portion Z.

The cutting rotors 16A, 16B, 1 are compared with the case of excavation simply by the endless chains 10A, 10B.
It is convenient to insert the stress material 21 such as H-shaped steel, as is clear from FIGS. 11 and 12, if the excavation width at both ends is thickened by 7A and 17B and the grooves are formed at both end surfaces. .

[0026]

As described above, according to the present invention, trench excavation can be performed easily without changing or adding a large-scale device, while preventing the earth and sand excavated by the chain cutter from scattering around. become able to.

[Brief description of drawings]

FIG. 1 is a side view of the excavator of the present invention in a hoisting state.

FIG. 2 is a front view thereof.

FIG. 3 is an enlarged front view.

FIG. 4 is an enlarged side view.

FIG. 5 is a front view of the chain.

FIG. 6 is a side view showing an arrangement mode of a connecting member with respect to a chain.

FIG. 7 is an enlarged front view of a main part of FIG.

FIG. 8 is a partially cutaway side view thereof.

FIG. 9 is an explanatory diagram of an excavated state.

FIG. 10 is a plan view of an example of excavation and insertion of a sheet.

FIG. 11 is a plan view of an example of a continuous wall.

FIG. 12 is a plan view of a continuous wall in a completed state.

FIG. 13 is a diagram showing a scattered state of excavated soil.

[Explanation of symbols]

2 ... Guide post, 3 ... Slider, 4 ... Support, 5
A, 5B, 6A, 6B ... Corner sprockets, 7A, 7B
... Drive sprockets, 8A, 8B, 9A, 9B ... Guide sprockets, 10A, 10B ... Endless chain, 11 ...
Drilling blade, 12 ... Connecting material, 13 ... Hydraulic motor, 14 ... Chuck cylinder, 14a ... Chuck, 16A, 16
B, 17A, 17B ... Cutting rotor, 18 ... Cutting bit, P ... Planar body, L ... No excavating blade area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 390036504 8-14-14 Ginza, Chuo-ku, Tokyo, Nittoku Construction Co., Ltd. (71) Applicant 000112093 Hirose Co., Ltd. 2-3-3, Nakajima, Nishiyodogawa-ku, Osaka-shi, Osaka No. (71) Applicant 591039953 Fudou Giken Co., Ltd. 1-2-1 Taito, Taito-ku, Tokyo (71) Applicant 000115463 Light Industry Co., Ltd. 4-35-5, Kudankita, Chiyoda-ku, Tokyo (71) Applicant 000176785 Mitsubishi Construction Co., Ltd. 3-3-6 Nihonbashihonmachi, Chuo-ku, Tokyo (72) Inventor Shohei Senda 1-7-2 Taito, Taito-ku, Tokyo Akishu Building Civil Engineering Research Center (72) Inventor Yasuo Miyazaki 2-16-6 Minami Oimazato, Higashisei-ku, Osaka-shi, Osaka (72) Inventor Naoki Jinnai 1-2-7 Koraku, Bunkyo-ku, Tokyo Sanshin Construction Industrial Co., Ltd. In-house (72) Inventor Koichi Inagawa 8-14-14 Ginza, Chuo-ku, Tokyo Nissho Construction Co., Ltd. (72) Inventor Osamu Ikuhara 3-1-1 Port Island Nakajima, Minatojima, Chuo-ku, Kobe, Hyogo Prefecture Building No. 41, No. 102 (72) Inventor Toshihiro Deguchi 5313-4 Tomonuma, Nogi-cho, Shimotsuga-gun, Tochigi Prefecture (72) Inventor Masatsugu Yamaguchi 4-35, Kudankita 4-chome, Chiyoda-ku, Tokyo (72) Inventor Hiroaki Omi 3-3-6 Nihonbashihonmachi, Chuo-ku, Tokyo Inside Mitsubishi Construction Co., Ltd.

Claims (1)

[Claims] An endless chain having a cutting blade is arranged around a support, and a sprocket wound around the endless chain is driven and rotated to move the endless chain in a circumferential direction. When excavating a groove having a substantially rectangular cross section in the ground vertical direction using a groove machine, in an endless chain in the groove machine, within a range in which the excavated earth and sand do not climb over the top of the support, A grooving method using a chain cutter method characterized by excavating while alternately moving.