JP3397308B2 - Underground excavator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground excavator for excavating underground or semi-underground vertically or horizontally, and more particularly to an underground excavator in which a rotary shaft is rotationally driven by a plurality of hydraulically operated drive jacks. Regarding the machine.

[0002]

2. Description of the Related Art FIG. 8 shows an example of an underground excavator excavating with a circular cross section, showing a vertical cross section showing the prior art, and FIG.
It is a -C arrow line view.

The conventional underground excavator 1 shown in FIGS. 8 and 9 has a machine body 2, a partition wall 3, a hood 4, a large number of cutter bits 6 on the front side, and a plurality of cutter bits 6 on the rear side. A cutter 5 having a kneading blade 7, a cutter rotating shaft 9 rotatably supported by a bearing 8 provided on the partition wall 3, and a crankshaft provided behind the cutter rotating shaft 9 and supported by a bearing 11. Crank 10 having 12 and crankshaft 1
2, a connecting member 13 rotatably attached to the connecting member 13, a plurality of driving jacks 14a, 14b, 14c arranged in a radial direction with respect to the connecting member 13, and a partition wall 3
A chamber 20 provided in a space surrounded by the hood 4 and the cutter 5, an earth discharging device 21, a plurality of moving devices 22 and the like are provided.

Although not shown in FIG. 8, the bearing 8 is the chamber 2
From 0, it has a sealing mechanism to prevent intrusion of excavated soil.

Then, the drive jacks 14a, 14
The rod ends of b and 14c are respectively connected to the connecting member 13 via the connecting pin 15, and the cylinder end is the body 2
It is swingably attached to the jack attachment portion 16 fixed inside the via a mounting pin 17.

[0006]

By the way, in the above-mentioned prior art, a plurality of three drive jacks 14a, 14a are provided.
Both b and 14c are connected to the connecting member 13 via a connecting pin 15. When the drive jacks 14a, 14b, 14c connected by this connection structure are expanded / contracted, the connection part may rotate around the crankshaft 12. Therefore, the expansion / contraction motion of the drive jacks 14a, 14b, 14c cannot be reliably converted into the rotary motion of the crank 10, and the cutter rotation shaft 9 cannot be reliably driven to rotate.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent the rotation of the connecting member itself and to reliably convert the expansion and contraction motion of the drive jack into the rotary motion of the crank, thereby rotating the cutter. An object of the present invention is to provide an underground excavator that can reliably rotate and drive a shaft.

[0008]

In order to achieve the above object, according to the present invention, in an underground excavator (1), a crankshaft (12) is provided behind a cutter rotating shaft (9), and the crankshaft (12) is provided. 12) is provided with a connecting member (13), and a plurality of hydraulically actuated drive jacks (14a), (14b), ... Are connected to the connecting member (13), and the plurality of drive jacks (14a) are also provided. Of (14b), ...
One end of one driving jack to the connecting member (13)
While firmly fixed, the other end is fixed inside the body of the excavator.
It is pivotally attached to the specified jack mounting part (16) and
When one end of the moving jack is pivotally attached to the connecting member (13).
At the other end, the other end is the jack mounting portion (1
Jack attachment part provided at a position different from 6)
The structure is pivotally attached to (16). Underground excavator
(1) is a circle or a part of circles when viewed from the front.
A drive that is made up of multiple ganged together and is provided in a circle.
The moving jacks (14a), (14b), ... Are an odd number of 3 or more
It features a book.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[0010]

Embodiment 1 FIG. 1 is a longitudinal sectional view showing Embodiment 1 of the present invention,
FIG. 2 is a view on arrow AA of FIG.

The first embodiment shown in FIGS. 1 and 2 is
This is an example applied to the above-mentioned conventional technique, and three drive jacks 14a, 14b, 14c are installed, and
Further, the same members as those of the conventional technique shown in FIG.

In the first embodiment shown in FIGS. 1 and 2, of the three drive jacks 14a, 14b, 14c, the cylinder end of one drive jack 14a has a jack fixing portion 18 provided on the connecting member 13. , And is integrally fixed. The rod end of the drive jack 14a is attached to the jack mounting portion 16 fixed inside the machine body 2.
Is attached via a mounting pin 17.

On the other hand, three drive jacks 14a, 14
Of the b and 14c, the rod ends of the two drive jacks 14b and 14c are connected to the connecting member 13 by the connecting pin 15 respectively.
Are connected via. Then, the drive jack 1
The cylinder ends 4b and 14c are attached to the jack attachment portion 16 fixed inside the machine body 2 via attachment pins 17.

According to the first embodiment, one end of one driving jack 14a among the three driving jacks 14a, 14b, 14c is connected to the jack fixing portion 18 provided on the connecting member 13, as described above. Since the driving jack 14a is integrally fixed, the driving jack 14a operates integrally with the connecting member 13. The other drive jacks 14b and 14c are connected to the connecting member 1
3 is connected via the connecting pin 15, and therefore operates according to the locus 19 of the connecting member 13.

Thus, the drive jacks 14a, 14b,
When 14c is expanded and contracted, these drive jacks 14
The force is concentrated on the connecting member 13 connecting the a, 14b, and 14c, and the crank 10 is rotated via the crankshaft 12. At the same time, the connecting member 13 tries to rotate around the cutter rotating shaft 9 which is the crank pin. However, since the connecting member 13 is integrally fixed to one drive jack 14a via the jack fixing portion 18, only the connecting member 13 cannot rotate.

Therefore, the drive jacks 14a, 14
The expansion and contraction movements of b and 14c are all converted into the rotation movement of the crank 10, and the cutter rotation shaft 9 can be reliably rotated.

[0017]

Second Embodiment Next, FIG. 3 is a vertical sectional view showing a second embodiment of the present invention, and FIG. 4 is a view taken along the line BB of FIG. 5 and 6 show the drive jacks 14a to 14e shown in FIGS.
The operation of the connecting member 13 and the crankshaft 12 when the expansion / contraction motion occurs is continuously illustrated.

In the second embodiment shown in these figures, five drive jacks 14a to 14e are installed. These 5
Of the drive jacks 14a to 14e, the cylinder end of one drive jack 14a is integrally fixed to the connecting member 13 via the jack fixing portion 18. The rod ends of the other drive jacks 14b to 14e are connected to the connecting member 13 via connecting pins 15, respectively.

The other structure of the second embodiment is the same as that of the first embodiment, and its operation is also the same as that of the first embodiment.

[0020]

Third Embodiment The present invention can also be applied to an underground excavator having a plurality of cutter rotating shafts. Embodiment 3 FIG. 7 is a rear view of an underground excavator having two cutter rotating shafts, showing Embodiment 3 of the present invention.

The third embodiment is a parallel version of the first embodiment and has the same structure and operation as the first embodiment.

Although not shown in FIG. 7, a control device for performing coordinated operation of the cutter rotating shafts 9 and 9'is provided.

[0023]

As described above, according to the present invention, the crankshaft 12 is provided behind the cutter rotating shaft 9, the crankshaft 12 is provided with the connecting member 13, and the connecting member 13 is hydraulically operated. Of the plurality of drive jacks 14a, 14b, ...
One of 14b, ... Is integrally fixed to the connecting member 13, and when the drive jacks 14a, 14b ,. The force is concentrated on the connecting member 13, and the connecting member 13 tries to rotate around the cutter rotating shaft 9 that is the crank pin via the crank shaft 12.
Since only one drive jack 14a is fixed to the crankshaft, only the connecting member 13 cannot rotate, and therefore, the expansion and contraction movements of the drive jacks 14a, 14b, ... Are all converted into rotational movements of the crank. There is an effect that the cutter rotating shaft 9 can be surely driven to rotate via the.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a vertical sectional view showing a second embodiment of the present invention.

FIG. 4 is a view taken along the line BB of FIG.

FIG. 5 is a rear view showing the operation process of the second embodiment.

FIG. 6 is a rear view showing the operation process subsequent to FIG. 5;

FIG. 7 is a rear view showing a third embodiment of the present invention.

FIG. 8 is a vertical sectional view showing a conventional technique.

9 is a view taken along the line CC of FIG.

[Explanation of symbols]

1 underground excavator 2 aircraft 3 partitions 4 hood 5 cutters 8 bearings 9 cutter rotation axis 10 cranks 11 bearings 12 crankshaft 13 Connection member 14a-14e drive jack 15 connecting pin 16 Jack mounting part 18 Jack fixing part 19 Trajectory of connecting members

Front Page Continuation (72) Inventor Masaki Miyashita 1-24-4 Shinkawa, Chuo-ku, Tokyo Within Otoyo Construction Co., Ltd. (56) Reference JP 2000-27593 (JP, A) Patent 2883325 (JP, B2) ( 58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/08

Claims (2)

(57) [Claims] 1. In an underground excavator (1), a crankshaft (12) is provided behind a cutter rotating shaft (9), a connecting member (13) is provided on the crankshaft (12), and the connecting member (13) is provided. 13) a plurality of hydraulically operated drive jacks (1
4a), (14b), with connecting ..., the plurality of power jack (14a), (14b), ... One of the
Secure one end of the book drive jack to the connecting member (13)
The other end of the excavator inside the fuselage
Attached to the jack attachment part (16),
One end of the jack is pivotally attached to the connecting member (13).
At the other end, the jack mounting portion (16) of the fuselage
Jack mounting part (1
An underground excavator characterized by being pivotally attached to 6) . 2. The underground excavator according to claim 1, wherein
(1) is a circle or a part of circles when viewed from the front.
A drive that is made up of multiple ganged together and is provided in a circle.
The moving jacks (14a), (14b), ... Are an odd number of 3 or more
An underground excavator characterized by consisting of a book.