JPH083519Y2 - Vertical and horizontal shafts - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical shaft and horizontal shaft continuous excavator in which excavation of a vertical shaft and a horizontal shaft is performed continuously by one excavator.

[0002]

2. Description of the Related Art An example of a conventional vertical shaft and horizontal shaft continuous excavator in which horizontal shaft excavation can be performed with a single shaft excavator will be described with reference to FIGS.

FIG. 4 is a vertical sectional side view, FIG. 5 is a front view of the shield machine shown in FIG. 4 in a state in which the shield machine is horizontally rotated, and FIG. 6 is a bottom view of FIG. Figure 4
A shield machine 4 serving as a main body of the entire apparatus equipped with a cutter 3 for excavating a vertical shaft 1 and a horizontal shaft 2 as shown in FIG.
Below the shield frame 8 integrated with the vertical shaft skin plate 5 having the descending jack 7 for taking a reaction force to the segment 6 and performing the excavation in the tip portion of the vertical shaft skin plate 5 used only when excavating the vertical shaft 1. It is housed in a spherical seal body 9 supported on the side, and the spherical seal body 9 has a size that can be accommodated in the vertical skin plate 5.

The spherical seal body 9 supports the inner skin plate 28 of the shield machine 4 in a vertically movable manner via a starting seal material 10 provided in the lower end circumferential direction,
Further, as shown in FIG. 5, the support shaft 11 provided on the inner surface of the vertical skin plate 5 on one horizontal axis 13 orthogonal to the central axis 5 ′ of the vertical skin plate 5.
The shield machine 4 can be rotated by 90 ° in the direction (front side) for excavating the shaft 2 together with the spherical seal body 9 by having the left and right support fitting portions 12 that are fitted to each other.

Further, as shown in FIG. 4, the spherical seal member 9 is horizontally notched on the lower side for the cutter 3, and also from directly above the horizontal axis 13 connecting the axial centers of the left and right support shafts 11 to the rear side. Opening 1 is cut out in the required range to
By forming 4, the front seal portion 15 and the rear seal portion 16 are configured.

Further, the front seal portion 15 has the horizontal axis 13 described above.
The space between the plane passing through and the opening 14 is the horizontal axis 1
It is configured by detachably connecting the division plates 17 which are vertically divided by a plurality of planes parallel to 3.

Between the front side of the shield frame 8 and the rear lower end of the vertical skin plate 5, a spherical sealing material 18 inclined at about 45 ° toward the front side is provided, so that the spherical sealing body 9 is sealed. The outer circumference is sealed.

Further, the shield frame 8 is detachably connected to the front seal portion 15 and the rear seal portion 16 of the spherical seal body 9 with the support shaft 11 of the spherical seal body 9 as the center. It is provided with rotary jacks 19 and 20 for performing rotation.

As shown in FIG. 6, the cutter 3 is fitted onto the inner cutter 21 and the outer periphery of the inner cutter 21, and can be connected / disconnected by inserting / removing a connecting / disconnecting device 22 provided in the inner cutter 21. The outside cutter 23 is provided, and the outside diameter of the outside cutter 23 matches the outside diameter of the vertical shaft skin plate 5.

The inner and outer cutters 21 and 23 are rotated by a rotary drive device 24 provided in the shield machine 4 and are supported by an elevating device 25 so as to be able to move up and down.

The vertical shaft skin plate 5 extends to a position directly above the outer cutter 23, and is substantially opposite to the front side where the spherical seal body 9 and the shield machine 4 rotate to advance the horizontal shaft 2. A U-shaped notch 26 is formed.
Reference numeral 27 denotes a propulsion jack for excavating the side shaft 2 provided in the shield machine 4.

Next, the operation of this conventional excavator will be described.

When the vertical shaft 1 and the horizontal shaft 2 are continuously excavated, as shown in FIG. 4, the entire excavating device is arranged so that the shield machine 4 faces downward and the shield machine 4 turns. The vertical shaft 2 is arranged so that the direction thereof coincides with the direction of the horizontal shaft 2 to be excavated, and the vertical shaft 1 is constructed up to a predetermined depth position by driving the cutter 3 to excavate and applying a propulsive force by the descending jack 7. At this time, the earth and sand excavated at the time of construction of the shaft 1 can be easily discharged to the ground through the opening 14, and at this time, the spherical seal body 9 with respect to the shaft skin plate 5 and the shield frame 8. Since it is sealed by the spherical sealing material 18, the soil will not enter the upper side inside the shield machine 4.

When the vertical shaft 1 is excavated to a predetermined depth and then the horizontal shaft 2 is excavated, first, the connecting / separating device 22 of the cutter 3 is retracted to separate the outer cutter 23 from the inner cutter 21, and then the ascending / descending operation. Activating the device 25, the inner cutter 21
Pull up. At this time, the inner cutter 21 is formed so as to fit within the spherical surface R formed by the spherical seal body 9.

Subsequently, the rotary jacks 19 and 20 are extended to rotate the spherical sealing member 9 by one split plate 17 about the horizontal axis 13 as shown in FIG. 7, and the rotary jack 19 is now attached. The divided plate 17 is separated from the front seal portion 15 to separate it from the rear seal portion 16.
Attach to

Subsequently, the rotary jack 19 is attached to the next division plate 17 of the front seal portion 15, and the rotary jack 20 is provided.
Are connected to the split plates 17 attached to the rear seal portion 16 and simultaneously extended to rotate the spherical seal body 9 by one split plate 17 again, and the same operation is repeated to shield as shown in FIG. Point the excavator 4 horizontally (right next to it).

Next, the back anchor 29 is attached to the inside of the vertical shaft skin plate 5 and to the rear side seal portion 16, and a reaction force is applied to the back anchor 29 by the propulsion jack 27 to seal it by the inner skin plate 28 (see FIG. 4). Excavate the side pit 2.

[0018]

In the conventional excavator described above, the sealing effect of the spherical sealing body 9 and the spherical sealing material 18 prevents the intrusion of earth and sand into the upper portion of the vertical skin casing 5. You can
When the spherical seal body 9 is started to rotate about the horizontal axis 13, a gap 30 is generated between the tip of the vertical skin plate 5 and the outer surface of the spherical seal body 9 as shown in FIG. Even after the shield machine 4 is oriented horizontally as shown in FIG. 5, a gap 30 remains between the tip of the vertical shaft skin plate 5 and the outer surface of the spherical seal body 9.

Therefore, in the conventional vertical shaft and horizontal shaft continuous excavator, when the shield machine 4 is not facing downward, earth and sand and mud from the gap 30 at the tip of the vertical shaft skin plate 5 inside the distal end of the vertical shaft skin plate 5. However, there is a drawback that it is difficult to perform dismantling and the like inside the aircraft.

The present invention eliminates such conventional drawbacks,
It is an object of the present invention to provide a continuous shaft and shaft excavator in which a gap is not formed between the tip of a skin plate for a shaft and the outer surface of the spherical seal body even when the shield machine is not facing downward. Is.

[0021]

SUMMARY OF THE INVENTION A vertical shaft and horizontal shaft continuous excavator according to the present invention comprises a spherical seal member housed in the tip of a vertical shaft skin plate, and the spherical seal member at the center of the vertical shaft skin plate. A support shaft provided on a shaft skin plate for rotatably supporting a horizontal axis orthogonal to the axis, and a shield machine that is supported in the spherical seal body and can be housed in a spherical surface formed by the spherical seal body. And a ring-shaped bottom spherical sealing material that is attached to the tip of the vertical shaft skin plate and is in horizontal contact with the lower outer surface of the spherical sealing body.

[0022]

[Operation] The tip spherical skin plate and the spherical seal member are sealed by the bottom spherical sealing material regardless of the direction of the shield machine, so that earth and sand may enter inside the tip skin plate distal end. Disappear.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional side view of an embodiment of the present invention when the shield machine 4 is facing downward.
The same parts as those in FIG.

In the present invention, a horizontal bottom plate 32 is provided inside the tip 31 of the vertical skin plate 5 to form the spherical seal member 9.
It is provided integrally with the vertical shaft skin plate 5 toward the side. A bottom spherical sealing member 33 having a ring-shaped planar shape is attached to the inner tip of the bottom plate 32 as described below so that the bottom spherical sealing member 33 contacts the lower outer surface of the spherical sealing member 9 horizontally. ing.

The details of the bottom spherical sealing member 33 and its mounting structure will be described with reference to FIG. 3. A bracket 34 is integrally mounted on the inner tip of the bottom plate 32, and a horizontal rib 35 and a vertical rib 36 are mounted on the bracket 34. Is stuck. The space surrounded by the horizontal ribs 35 and the vertical ribs 36 is an oil chamber 37, and the shield machine 4
The pressure oil such as the hydraulic oil (see FIG. 1) is supplied to the oil supply port 3 of the bottom plate 32.
8 is supplied to the oil chamber 37 through the oil supply passage 39.

The bottom spherical sealing material 33 is made of urethane rubber or the like in a plane shape in a ring shape, and has a thin portion 40 at the center of the cross section and thick portions 41, 42 on both sides of the cross section.
It has become.

One thick portion 41 of the bottom spherical sealing member 33
Is fixed to the upper surface of the horizontal rib 35 by a contact plate 43 and a bolt 44, and the other thick portion 42 is fixed to the inner side surface of the vertical rib 36 by a contact plate 45 and a bolt 46. As a result, the bottom spherical sealing material 33 is attached to the bracket 34 and the bottom plate 3.
2 through the tip 3 of the vertical shaft skin plate 5 shown in FIG.
Since it is attached to the inside of 1, the pressure of the pressure oil supplied to the oil chamber 37 acts on the back surface of the thin-walled portion 40, and the thin-walled portion 40 of the bottom spherical sealing member 33 always keeps the spherical seal 9 It will be in close contact with the outer surface of the lower part of.

When the shield machine 4 is turned downward as shown in FIG. 1 and the spherical seal body 9 is rotated about the horizontal axis 13 to horizontally orient the shield machine 4 as shown in FIG. When the inner cutter 21 is pulled up as shown by the chain double-dashed line in FIG. 1, the inner cutter 21 can prevent the intrusion of earth and sand from below. Further, even when the rotation center of the spherical seal body 9 and the shield machine 4 are horizontally oriented as shown in FIG. 2, the lower outer surface of the spherical seal body 9 is sealed by the bottom spherical seal material 33, so It is possible to prevent dirt and sand from entering the inside of the tip 31 of the skin plate 5.

[0030]

According to the present invention, even when the shield machine is not facing downward, the bottom spherical sealing material can prevent intrusion of earth and sand between the tip of the vertical skin plate and the outer surface of the spherical sealing body.

[Brief description of drawings]

FIG. 1 is a vertical side view of an embodiment of the present invention when a shield machine is facing downward.

FIG. 2 is a vertical cross-sectional side view of the shield machine shown in FIG. 1 when it is rotated.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a vertical sectional side view of a conventional device.

5 is a front view showing the shield excavator in FIG. 4 in a state in which the shield machine is rotated in the horizontal direction by cutting the right half.

FIG. 6 is a bottom view of FIG.

FIG. 7 is a side view showing the rotation of the shield machine and the operating state of the spherical seal body.

FIG. 8 is a side view showing the rotation of the shield machine and the operating state of the spherical seal body.

[Explanation of symbols]

 4 Shield machine 5 Vertical shaft skin plate 5'Center axis 9 Spherical seal body 11 Support shaft 13 Horizontal axis 31 Tip 33 Bottom spherical seal material R Spherical surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Kasai 2-4-1 Nishitsutsujigaoka, Chofu City, Tokyo Metropolitan Technology Research Institute (72) Inventor Toshihiko Bessho 1-chome, Nishishinjuku, Shinjuku-ku, Tokyo 25-1 Taisei Construction Co., Ltd. (72) Inventor Tadao Hirayo 1-chome Nishishinjuku, Shinjuku-ku, Tokyo 25-1 Taisei Construction Co., Ltd. (72) Ken-ichi Kaneko 1-chome Nishishinjuku, Shinjuku-ku 25, Tokyo No. 1 Taisei Construction Co., Ltd. (72) Inventor Hiroyuki Ito 13 Showa-cho, Minato-ku, Nagoya, Aichi Ishikawajima Harima Heavy Industries Co., Ltd. Nagoya Plant (72) Inventor Toshiaki Uehara 13 Showa-cho, Minato-ku, Nagoya, Aichi Ishikawajima Harima Heavy Industries Ltd. Nagoya factory

Claims (1)

[Scope of utility model registration request] 1. A spherical seal body housed in a tip portion of a vertical shaft skin plate, and a vertical shaft for rotatably supporting the spherical seal member around a horizontal axis orthogonal to a central axis of the vertical shaft skin plate. Shaft provided on the skin plate for use, a shield machine that is supported in the spherical seal body and can be accommodated in the spherical surface formed by the spherical seal body, and the spherical seal body attached to the tip of the vertical skin plate. A vertical shaft and horizontal shaft continuous excavator, which is provided with a ring-shaped bottom spherical sealing material that is in horizontal contact with a lower outer surface.