JPH08254095A - Shield machine - Google Patents

Abstract

PURPOSE: To perform the separation works for a shield body simply and quickly. CONSTITUTION: A side cutter head 6 installed on the side shield body 3 arranged on each side of a three-gang type shield machine is formed from a plurality of conical cutters 7 furnished rotatably round the radial axis (c) of the shield body. A cone rotating device 16 is provided to rotate these conical cutters 7 round the radial axis. Thereby it is possible to arrange the conical cutter part of the side cutter head along the outer side face of the shield body in the central part, so that there is no need to provide any notch in the side part of the central shield body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield machine.

[0002]

2. Description of the Related Art Recently, a multi-face type, for example, triple shield shield machine has been developed. This triple shield machine includes, for example, as shown in FIGS. 13 and 14, a central shield main body 201 and side shield main bodies 20 detachably attached at positions slightly rearward of both sides of the central shield main body 201.
2 and the central shield body 20
The cutouts 20 are provided on both sides of the cut shield 20 so that the cutter head 203 of the side shield body 202 can pass therethrough during its rotation.
1a had been formed.

As a method of using this triple shield machine, a wide tunnel is excavated laterally while the triple tunnel is used halfway, and a normal circular tunnel is excavated after a predetermined location. There are cases.

At this time, when the conventional triple shield machine is changed to a single shield machine, first, the side shield bodies 202 on both sides are removed from the center shield body 201, and then the center shield body is removed. The cutouts 201a formed on both sides of the main body 201 were closed, and excavation was continued.

[0005]

As described above, there is a problem that the work of closing the cutout portion 201a of the central shield body 201 in a narrow tunnel is very troublesome and time consuming.

Therefore, an object of the present invention is to provide a shield machine capable of solving the above problems.

[0007]

In order to solve the above-mentioned problems, the first means of the present invention is that at least two shield bodies are detachable at their side portions and the position of the front end face of each shield body. Is a shield machine that is connected differently in the front-rear direction, the cutter head provided on one shield body is rotatably arranged around the axis of the shield body, and is provided on the other shield body located rearward. The cutter head is composed of a plurality of cone-shaped cone cutters that are rotatably provided around the radial axis of the shield body, and these cone cutters are rotated about the radial axis. It is a shield machine equipped with a device.

In order to solve the above-mentioned problems, the second means of the present invention is that at least two shield bodies are detachable at their side portions and the front end face of each shield body is positioned in the front-back direction. In a shield machine that is connected differently, the cutter head provided on one shield body is rotatably arranged around the shield body axis, and the cutter head provided on the other shield body located behind is used. An oscillating body which is oscillatably supported by the partition wall of the shield body and in a plane orthogonal to the rotation axis thereof, and a plurality of oscillating bodies which are rotatably provided around the radius axis of the other shield body. A cone-shaped cone cutter portion, and a swing drive device for swing-driving the swing body around the other shield body axis is provided. A shield machine provided with a rotary driving device for rotating at the shield body radius axis around.

Further, in each of the above shield machines,
At the front position of the other shield body and between the outer peripheral surface of the shield body and the outer peripheral end of each cone cutter portion, each swing cutter portion is provided, and each of these swing cutter portions is provided on the other shield body shaft. This is provided with a rocking device that rocks in a plane parallel to the heart.

[0010]

According to the above construction, the cutter head provided on the other shield body connected to the side portion of the one shield body is composed of a plurality of cone cutter portions rotated around the radial axis of the shield body. Since it is configured, the other cutter head can be arranged along the outer surface of the one shield body.

In other words, it is not necessary to cut out the side portion of one shield body, and therefore, when the shield bodies are separated from each other, the separation work becomes simple.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the shield machine according to the present invention will be described below with reference to FIGS.

1 and 2, reference numeral 1 denotes a multi-face type, for example, triple shield machine, which is connected to a central shield body 2 and both sides of the central shield body 2 at a rear position for a predetermined distance. It is composed of two side shield bodies 3 arranged.

The central shield body 2 is provided with a central cutter head 5 having a circular face plate at its front portion, which is rotatable about an axis a of the shield body.
Inside the central shield body 2, there is provided a central rotary drive (not shown, a known rotary drive is used) for rotating the central cutter head 5, and each side shield. A side cutter head 6 is provided at the front of the main body 3.

The central cutter head 5 is located in front of the center position of the both side cutter heads 6 in the front-rear direction, that is, the cylindrical central shield body 2 is provided.
Are arranged so as to be positioned in front of the side shield bodies 3 on both sides, and the overlapping portions of the side shield bodies 3 with the central shield body 2 are cut off (in the conventional example, See Figure 17 shown).

The side cutter head 6 is, as shown in FIGS. 1 and 3, five cone-shaped cone cutters arranged radially (in a conical shape when viewed from the axis of the shield body). 7, a circular cutter head portion 8 having a small diameter arranged in the center thereof, an outer peripheral portion of the cone cutter portion 7,
That is, it is composed of a swinging cutter portion 9 for excavating between the outer peripheral surface of the side shield body 3 and the outer peripheral end portion of each cone cutter portion 7.

The above-mentioned five cone cutter portions 7 are two (or three) truncated cone-shaped (conical frustoconical) first cone cutter portions 7A having a slightly bulged center, and these three first cone cutter portions. It is composed of three (or two) second truncated cone-shaped cone cutters 7B which are arranged between the cone cutters 7A and are slightly concave in the center.

Further, each of these corn cutter parts 7A, 7B
In this case, a large number of cutter bits 10A and 10B are provided at the same intervals so as not to interfere with each other. In addition, in FIG. 1, the cutter bits 10A and 10B are indicated by their center lines at their mounting positions.

The first cone cutter portion 7A and the second cone cutter portion 7B are different only in that their central portions are slightly swollen or concave, and their configurations are basically the same.

Therefore, the first cone cutter portion 7A will be described as the cone cutter portion 7 in the description. In this description, the first cone cutter portion 7A will be simply referred to as the cone cutter portion 7 for description.

The cone cutter portion 7 is a side shield body 3
Of the partition body disposed in the front part of (1) and along a plane (in this embodiment, a vertical plane) orthogonal to the side shield body axis b (parallel to the center shield body axis a). It is rotatably supported by (partition wall portion) 11.

That is, in the central portion of the partition wall body 11, the cylindrical support member 12 is projected forward and the partition wall body 11 is formed.
A flange portion 11a is provided on the outer peripheral portion of the so as to project forward.

Both ends of the hollow cone rotating shaft body 13 provided at the center of the cone cutter portion 7 are provided at the flange portion 1 of the cylindrical supporting member 12 and the partition wall 11.
1a and the radial axis c through the bearings 14 and 15 respectively.
A cone rotation drive device 16 is provided which is rotatably supported around the cone cutter 7 and rotates each of the cone cutters 7 via the cone rotation shaft 13.

The cone rotation driving device 16 is inserted through the cylindrical support member 12 and a driven bevel gear 21 fixed to the inner end (center end) of the cone rotation shaft 13. A hollow drive shaft body 22, a drive-side bevel gear 23 mounted on the front end portion of the drive shaft body 22 and meshed with the driven-side bevel gear 21, and a flat drive shaft body mounted on the rear end portion of the drive shaft body 22. A motor for a cone portion that rotates a gear 24 and a drive pinion 25 that meshes with the spur gear 24 (for example, a plurality of cone motors are provided, but if there is capability, one motor may be used, or an electric motor or a hydraulic motor may be used) 26 It consists of and.

The rotary drive mechanism for the circular head portion 8 is not provided separately, and the rotary shaft 27 of the circular head portion 8 is supported by the front end portion of the cylindrical support member 12, and At the rear end thereof, the above-mentioned cone portion rotary shaft body 1
A circular head driving bevel gear 28 that meshes with a driven bevel gear 21 attached to the inner end portion of 3 is attached.

Therefore, when the cone portion motor 26 is driven, the radius of each cone cutter portion 7 (7A, 7B) is increased via the spur gear 24, the cone portion rotary shaft body 13 and the pair of bevel gears 21, 23. The circular cutter unit 8 is rotated about the axis c, and at the same time, the circular cutter unit 8 is also rotated together with the bevel gear 28 for driving the circular head unit and the rotary shaft 27.

Further, in order to excavate the front portion of the side shield body 3 of the cone cutter portion 7 where the outer peripheral side bearing 15 is provided, the swing cutter portion 9 and the swing cutter portion 9 are swung. A rocking device 31 is provided.

The swing cutter 9 is inserted through the hollow portion 13a of the cone rotary shaft 13 of each cone cutter 7, and is disposed via the bearings 32 and 33.
And the arm member 3 on the outer end of the swing shaft body 34, respectively.
A plurality of pieces attached via 5 (3 in FIG. 3)
(Provided individually).

The oscillating device 31 includes the oscillating part driven bevel gear 4 attached to the inner end of the oscillating shaft body 34.
1, a swinging part rotary shaft body 42 inserted through the inside of the tubular support member 12, and a swinging part driven shaft bevel gear 41 which is attached to the front end part of the swinging part rotary shaft body 42 and meshes with the swing part driven side bevel gear 41. The rocking part driving side bevel gear 43 and the rocking jack device (specifically, a hydraulic cylinder) 44 connected to the rear end of the rocking part rotary shaft body 42 through the bent part 42a. It consists of and.

Therefore, the swinging jack device 44 is used.
When the rod 44a for moving in and out is driven to move in and out, the swinging part rotary shaft body 42 is swung at a predetermined angle, and therefore, it swings through the pair of bevel gears 41 and 43 and the swinging shaft body 34. The moving cutter 36 is swung [the position 36 (a) in FIG.
(Shown at position (b)], the outer peripheral portion where the cone cutter portion 7 does not exist is excavated.

According to the structure of the shield machine, the central cutter head 5 of the central shield body 2 and the side cutter heads 6 of the both-side shield bodies 3 excavate a wide tunnel laterally.

The side cutter head 6 has five cone cutters 7, a circular cutter 8 at the center, and a swing cutter 9 provided corresponding to each cone cutter 7, so that the center cutter head 5 is provided. The part that does not interfere with the ground is surely excavated.

When excavating a circular tunnel with only the central shield body 2, the side shield bodies 3 are removed from the central shield body 2. At this time, the side shield body 3 side is provided. Among the partial cutter heads 6, especially the cone cutter part 7 is arranged radially at the outer position so as not to overlap the central shield body 2, so that even if the side shield body 3 is removed, The outer wall surface of the partial shield body 2 has no notch to be closed, and therefore the side shield body 3 can be easily separated in a short time.

By the way, in the above embodiment, the rotational axis c of the cone cutter portion 7 of the side cutter head 6 is arranged in a plane (in the vertical plane) orthogonal to the rotational axis b of the side shield body 3. However, as shown in FIG. 4, for example, the cone rotating shaft body 13 of each cone cutter 7 is tilted rearward so that the surface of each cone cutter 7 (the surface along the generatrix) becomes
You may make it orthogonal to the rotating shaft center b.

Next, a second embodiment of the present invention will be described with reference to FIG. In each embodiment of the present invention described below (particularly in the drawings), the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the first embodiment, the cone rotation driving device 16 for driving the cone cutter 7 is arranged at the center of the side shield body 3, but, for example, as shown in FIG. It may be placed at.

That is, the driven side spur gear 51 is attached to the outer end portion of the cone portion rotary shaft body 13, and the driven side spur gear 51 is meshed with the side shield body 3 side via the intermediate spur gear 52. A cone portion motor (an electric motor or a hydraulic motor is used) 54 having the driven side spur gear 53 is arranged. The outer end of the cone portion rotary shaft 13 is rotatably supported by a gear casing 55 fixed to the side shield body 3 side via a bearing 56.

In this case, the circular cutter portion 8 is rotated via the driven bevel gear 21 and the circular head driving bevel gear 28 attached to the cone portion rotating shaft body 13.
Next, a third embodiment of the present invention will be described with reference to FIG.

In the first embodiment described above, the cone rotation driving device 16 for driving the cone cutters 7 is arranged at the center of the shield body 3, and all the cone cutters 7 are arranged in the same drive shaft body. Although it is configured to be driven by 22, a plurality of, for example, two first electrodes, as shown in FIG.
Alternatively, the drive shafts 61 and 62 may be driven.

In this case, the first and second drive shaft bodies 61, 62 are arranged inside the cylindrical support member (not shown), and are attached to the front end portion of the inner first drive shaft body 61. The first driving-side bevel gear 63 meshes with the first driven-side bevel gear 64 attached to the inner end portion of the cone portion rotary shaft body 13 of the predetermined cone cutter portion 7, and the outer second drive shaft body 64. The second drive-side bevel gear 65 attached to the front end portion of 62 is the second driven-side bevel gear 66 attached to the inner end portion of the cone portion rotary shaft body 13 of the remaining cone cutter portion 7.
And the first and second spur gears 67 and 68 attached to the rear end portions of the drive shaft bodies 61 and 62, respectively.
, A plurality of first and second cone portion motors (electric motors or hydraulic motors are used) 71 and 72 having first and second pinions 69 and 70, respectively, are arranged.

Therefore, each of the cone portion motors 7 is
The rotation speed or the rotation direction of the cone cutter unit 7 driven according to 1, 72 can also be made different. Next, a fourth embodiment of the present invention will be described with reference to FIG.

In each of the above embodiments, the circular head portion 8
However, in the fourth embodiment, a rotation drive device is additionally provided as the rotation drive mechanism for the circular head portion 8.

That is, as shown in FIG. 7, the oscillating portion rotary shaft body 42 is formed in a tubular shape, and the central space portion 4 thereof is formed.
The rotary shaft body 27 of the circular head portion 8 is inserted and arranged in 2b, and a circular head portion motor (an electric motor or a hydraulic motor is used) 75 is connected to the rear end portion. Of course, the front end portion of the rotary shaft 27 is connected to the circular head portion 8.

A bevel gear 43 on the drive side of the swing portion is attached to the front end of the rotary shaft body 42 of the swing portion, and a swing jack device 44 is connected to the rear end thereof.

Therefore, according to this structure, the circular head portion 8 can be driven independently. Next, a fifth embodiment of the present invention will be described with reference to FIGS.

In the first embodiment described above, the cone cutter portion 7 arranged in the radial direction in front of the side shield body 3 is swung (or rotated) about the rotation axis b of the shield body 3. ) Is configured so that
In the fifth embodiment, each cone cutter portion 7 is configured to be swingable in a plane (in a vertical plane) orthogonal to the rotation axis b by a predetermined circumferential distance (or angle) δ. is there.

That is, in front of the partition wall body 11, a circular rocking body 81 is supported via a swivel bearing 82, and the rocking body 8 is supported.
No. 1 inner protruding portion 81a and outer protruding portion (flange portion) 81
b, both end portions of the cone portion rotary shaft body 13 are supported via bearings 14 and 15, respectively, and further the inner end portions thereof are projected rearward to form a cylindrical projecting portion 81c. A rod portion 83a of a swing drive jack device (swing drive device) 83 is connected to the rear end portion of 81c.

A plurality of support rollers 84 for swingably supporting the swing body 81 are provided at appropriate positions on the partition wall 11 side. In FIG. 10, 85 and 86 are sealing materials.

According to this structure, the entire side cutter head 7 can be swung by a predetermined circumferential amount (or angle) δ, and as shown in FIG. 11, on the central shield body 2 side, Since the concave portion 2a that allows the side cutter head 7 to enter the predetermined amount d is formed, the excavation performance can be improved as compared with the above-described embodiments.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. In each of the above embodiments, the central shield body is located in the front and the cutter head is circular, and both side shield bodies are located in the rear and the cutter head is composed of a plurality of cone cutter parts. As explained in the 6th book
On the contrary, the embodiment is constructed.

That is, as shown in FIGS. 12 and 13, the central and side shield bodies 102, 103 are arranged so that their front end positions are substantially at the same position, and the side cutter heads of both side shield bodies 103 are arranged. 106 is circular and the central cutter head 105 of the central shield body 102 is composed of a plurality of cone cutters 107.

With such a structure, the central shield body 102 can be left, and the side shield bodies 103 can be further continued to be excavated.
By the way, in the above-described first embodiment, the arrangement state of the cutter bits 10 of the cone cutters 7 is described to be provided at the same position in each adjacent cone cutter 7, but, for example, as shown in FIG. The arrangement of the cutter bits (the position of the cutter bit is represented by the center line) 10 between the adjacent cone cutters 7A and 7B may be alternately arranged, and the adjacent cone cutters 7A and 7B may partially overlap each other. If it is possible, excavation can be performed more reliably.

Further, a spiral screw blade 91 as shown in FIG. 15 may be used instead of the cone cutter portion 7 in each of the above embodiments. In this case, a plurality of cutter bits 9 are provided on the outer peripheral surface of the blade at predetermined intervals.
Many 2 are attached. Of course, this screw blade 9
The outer peripheral surface of No. 1 has an outer diameter increasing toward the outer peripheral side.

Further, the model to which the shield machine described in each of the above embodiments is applied is not particularly limited, and can be applied to any model such as muddy water and mud pressure system.

Further, in the above-mentioned embodiment, at least the central shield body is described so as not to project forward of the side shield body, but since the cutter heads of the central portion and the side shield body do not interfere with each other, The cutter head of the central shield body may be located in front of the cutter heads of both side shield bodies.

The cone cutter may have various other shapes such as a screw shape or a spoke shape.

[0057]

As described above, according to each constitution of the present invention,
Since the cutter head provided on the other shield body connected to the side portion of one shield body is composed of a plurality of cone cutters rotated around the radial axis of the shield body, The other cutter head can be arranged along the outer surface, and therefore, it is not necessary to cut out one side of the shield body as in the conventional case. No need to close the notch
The work of separating the shield body can be performed easily and in a short time.

[Brief description of drawings]

FIG. 1 is a front view of a shield machine according to a first embodiment of the present invention.

FIG. 2 is a plan view of the shield machine in the first embodiment.

FIG. 3 is a cross-sectional view of the side shield body of the first embodiment.

FIG. 4 is a sectional view showing a modification of the side shield body in the first embodiment.

FIG. 5 is a sectional view of a main part of a side shield body according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a main part of a side shield body according to a third embodiment of the present invention.

FIG. 7 is a sectional view of a shield machine according to a fourth embodiment of the present invention.

FIG. 8 is a front view of a shield machine according to a fifth embodiment of the present invention.

FIG. 9 is a plan view of a shield machine in the fifth embodiment.

FIG. 10 is a cross-sectional view of a side shield body according to the fifth embodiment.

FIG. 11 is a cross-sectional view of essential parts of a central shield body of the fifth embodiment.

FIG. 12 is a front view of a shield body according to a sixth embodiment of the present invention.

FIG. 13 is a plan view of a shield body according to the sixth embodiment.

FIG. 14 is a partial front view of a cone cutter portion showing a modified example of the arrangement state of the cutter bits in each embodiment of the present invention.

FIG. 15 is an enlarged view of an essential part showing a modified example of the cutter head in each embodiment of the present invention.

FIG. 16 is a front view of a conventional triple shield machine.

FIG. 17 is an exploded perspective view of a conventional triple shield machine.

[Explanation of symbols]

 1 shield machine 2 center shield body 3 side shield body 5 center cutter head 6 side cutter head 7 cone cutter portion 8 circular cutter portion 9 swinging cutter portion 11 partition wall body 12 cylindrical support member 13 cone portion rotating shaft Body 16 Cone Rotation Driving Device 22 Drive Shaft Body 27 Rotating Shaft Body 31 Swinging Device 34 Swinging Shaft Body 36 Swinging Cutter 38 Swinging Unit Rotating Shaft Body 44 Swinging Jack Device 54 Cone Motor 81 Swinging Body 83 Swinging Dynamic drive jack device

Claims (3)

[Claims] 1. A shield machine in which at least two shield bodies are detachably connected at their sides and the positions of the front end faces of the shield bodies are different in the front-rear direction, and one shield is provided. The cutter head provided in the main body is rotatably arranged around the shield main body axis.
A cutter head provided on the other shield body is composed of a plurality of cone-shaped cone cutters provided rotatably around the radial axis of the shield body, and each of these cone cutters is provided with a radial axis. A shield machine having a rotation drive device for rotating the shield machine. 2. A shield machine in which at least two shield bodies are detachably connected at their side portions and the positions of the front end faces of the shield bodies are different in the front-rear direction, and one shield is provided. The cutter head provided in the main body is rotatably arranged around the shield main body axis.
An oscillating body in which the cutter head provided on the other shield body is swingably supported in the partition wall portion of the shield body and in a plane orthogonal to its rotation axis, and the other shield body radius axis is attached to the oscillating body. A plurality of conical cone cutters that are rotatable around the center are provided, and a swing drive device that swings the swing body around the other shield body axis is provided. A shield machine equipped with a rotation drive device for rotating the cutter unit around the radius axis of the other shield body. 3. A swinging cutter portion is provided at the front position of the other shield body and between the outer circumferential surface of the shield body and the outer circumferential end portion of each cone cutter portion. The shield machine according to claim 1 or 2, further comprising an oscillating device which oscillates in a plane parallel to the axis of the other shield body.