JPH0571291A - Detachable drill-boom - Google Patents

Abstract

PURPOSE:To bore a blasting hole without carrying a boom cutter type excavator from a tunnel during the construction thereof. CONSTITUTION:A main boom 46 is provided to a chuck 42 capable of holding a boom cutter 9 of an excavator 6 so that it is capable of oscillating through a main jack 45. A sub-boom 47 having a drill 50 is provided to the main boom 46 so that it is capable of bending through a sub-jack 48.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a removable drill boom used for excavating the natural ground when constructing a tunnel.

[0002]

2. Description of the Related Art Conventionally, when constructing a tunnel, an excavator is selected according to the geological conditions of the natural ground for excavating the natural ground. For example, in soft rocky ground, a boom cutter type excavator is used for excavation. However, when a geological feature such as hard rock that cannot be excavated by the excavator is encountered during excavation, blasting or the like is used for excavation. In this case, it was necessary to once take out the boom cutter type excavator from the tunnel under construction, carry in a new drill jumbo, and open a hole for loading blasting dynamite and the like.

[0003]

However, with the boom cutter type excavator, the boom cutter type excavator is used every time a hard rock type ground is encountered when excavating the soft rock type ground. The wasteful process of exchanging the excavator, such as carrying out the machine from the tunnel under construction and carrying in the drill jumbo, is required.

Therefore, in view of the above circumstances, the present invention provides a detachable drill boom capable of forming a hole for loading blasting dynamite or the like without carrying out the boom cutter type excavator from the tunnel under construction. The purpose is to provide.

[0005]

That is, the present invention has a main body (46, 47), and a cutter mounting portion (41) is provided at one end of the main body (46, 47) for a cutter of an excavator (6). (9
a) is detachably attached to the main body (46,
47) is provided with a rock drilling machine (50).

The numbers in parentheses are for convenience of showing the corresponding elements in the drawings, and the present description is not limited to the description in the drawings. The same applies to the column of "action" below.

[0007]

With the above-described structure, the present invention acts so that the rock drilling machine (50) can be mounted on the excavator (6) by mounting the cutter mounting portion (41) on the cutter (9a).

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side view showing an embodiment in which a drill boom according to the present invention is attached to a tunnel excavation device, FIG.
1 is a perspective view showing an embodiment of the cutter holding device for the drill boom shown in FIG. 1, and FIG. 3 is a cutaway plan view showing an embodiment of a tunnel excavation device capable of mounting the drill boom shown in FIG. FIG. 4 is a cutaway side view of the tunnel excavation device shown in FIG. 3.

As shown in FIG. 1, the drill boom 40 according to the present invention has a cutter gripping device 41. The cutter gripping device 41 has a truncated cone-shaped chuck 42 as an axial center C.
It is provided so that it can be bent in the directions of arrows R and S centering on T2. That is, as shown in FIG.
The main body 42e, 42e has a truncated cone shape, and the divided portions 42f, 42e
It is provided in a form of being divided into two by f, and flanges 42d and 42d are respectively provided on the conical portion of the divided portion 42f of the main body 42e in a shape that follows the mother name of the conical portion of the divided portion 42f. The flange 42d is provided with a hole through which the gripping pin 53 made of a bolt or the like can penetrate in the vertical direction in the figure, and the main bodies 42e and 42e are formed in the flange 42d.
The grip pins 53 are inserted into the holes of d and 42d from the upper side in the drawing, and the nuts 54 are tightened to tighten the flanges 42d and 4d.
2d can be joined by joining each other. Also, the chuck 4
The plate-like bracket 43 is provided on the plane portion of the second main body 42e.
Are provided perpendicularly to the plane portion, and a cylindrical pin 44 is slidably provided on the bracket 43 so as to form the axial center CT2. That is, the chuck 42
Opens by bending in the directions of arrows R ′ and S ′ around the axis CT2, and closes by bending in the directions of arrows R ″ and S ″. Further, as shown in FIG. 1, the pin 44 is provided such that the axial center CT2 formed by the pin 44 is orthogonal to the rotation center CT1 of the cutter 9a of the excavator 6 described later in the direction perpendicular to the plane of FIG. .. Further, as shown in FIG. 1, the chuck 42 is provided with an inner surface 42c along the outer peripheral surface 9d of the cutter 9a forming a substantially trapezoidal cross section. 42b is provided so as to hang on the lower bottom end of the trapezoidal cross section of the cutter 9a, and further, a main jack 45 composed of a hydraulic jack or the like is projected and retractable in the directions of arrows K and L on the outer peripheral surface 42a of the chuck 42. It is provided in. Main jack 45
The other end of the main boom 46 is bent in a dogleg shape.
Is pivotally provided near the bending portion of the main boom 46, and one end of the main boom 46 swings to the cutter gripping device 41 via the pin 44 in the directions R and S about the axis CT2. It is provided in a freely movable form. That is, as shown in FIG. 2, the main boom 46 (shown by a broken line in the figure)
A pin 44 is fitted in such a manner that the brackets 43, 43 are sandwiched at one end thereof and is swung in the directions of arrows R and S about the axial center CT2 formed by the pin 44. Further, the main boom 46 is provided with a sub jack 48 (illustrated by a chain double-dashed line in the drawing) composed of a hydraulic jack or the like so as to project and retract in the directions of arrows M and N, and at the other end of the sub jack 48, A rod-shaped sub-boom 47 is pivotally mounted. Sub boom 47
Is provided at the other end of the main boom 46 so as to be swingable in the directions of arrows T and U about the axis CT3, and a rock drill 50 is provided on the upper surface 47a of the sub boom 47. A drill 51 is provided at the tip of the rock drilling machine 50 (on the leftmost side in the figure) to open a hole for blasting,
The drill 51 rotationally drives in the directions of arrows V and W around the rock drilling axis CT4 to drill rocks. The rock drilling axis CT4 coincides with the rotation center CT1 of the cutter 9a of the excavator 6 when the main boom 46 and the sub boom 47 are folded and held in the horizontal direction (direction parallel to the arrow A and B directions). It is provided in the shape.

As shown in FIGS. 3 and 4, the tunnel excavation device 1 has a shell-shaped outer shell 2, and the outer shell 2 is in the excavating direction, that is, in the directions of arrows A and B. The front torso 2A and the rear torso 2B are connected to each other so as to be able to move back and forth. That is, as shown in FIG. 4, a relay barrel 2C is formed at the tip of the rear barrel 2B so as to fit into the rear end of the front barrel 2A. A plurality of outer shell jacks 2D are provided along the shape so as to project and retract in the directions of arrows A and B. And outer shell jack 2D
By pushing out, the rear body 2B can move in the direction of arrow A by the pitch of the outer shell jack 2D in such a manner that a reaction force is applied to the existing ring 16. In addition, an invert 25b is formed below the front body 2A and the rear body 2B in a form in which the rock mass is exposed by the ground 20 being cut open. The invert 25b extends from the face 20a toward the rear of the tunnel, that is, in the direction of arrow A. Is continuously formed in the form of extending in the direction of arrow B from. Front torso 2A is Invert 25b
The bottom portion 2B ₁ is formed at the lower side of the rear body 2B so as to be shielded from the invert 25b. A plurality of outer shell legs 3 are arranged on the left and right inner side surfaces of the front body 2A and the rear body 2B in a line in the directions of arrows A and B so as to be vertically movable so as to project downward from the lower end portions of the front body 2A and the rear body 2B. And therefore,
The outer shell jack 3 provided on the rear body 2B penetrates the bottom portion 2B ₁ . And each outer shell leg 3 is invert 25
The outer shell leg 3 is supported by b, and the leg jack 3A moves up and down the front torso 2A and the rear torso 2B, that is, arrows C and D.
It is provided so that it can be moved in any direction.

As shown in FIG. 4, at the front end portion of the front body 2A, there is provided a front receiving sheet pile 5 for temporarily supporting the arch portion of the face 20a along the inner circumference of the front body 2A. Arrow A,
A plurality of hydraulic jacks are provided so as to project and retract in the B direction, and an excavator 6 is installed inside the front body 2A. The excavator 6 has a machine body 6a, and as shown in FIG. 4, a hydraulic unit 61 for operating and driving the excavator 6 and a control panel 62 are built in the rear portion of the machine body 6a.
To the rear of the machine body 6a, a toggle jack 13 is appropriately selected and provided in a form corresponding to the weight to be supported and pressed. A slide shoe mechanism 7 for propelling the machine body 6a in the direction of arrow A is provided at the bottom of the machine body 6a.
The slide shoe mechanism 7 is composed of a fixed shoe 7A, a drive shoe 7B, a slide jack 7C and the like.
The fixed shoe 7A is formed in a ski shape so as to support the machine body 6a, and the fixed shoe 7A is connected to the machine body 6a so as not to move in the directions of arrows A and B. Further, the drive shoe 7B is formed in a ski shape like the fixed shoe 7A, and the drive shoe 7B is configured to be able to move in advance in the arrow A direction with respect to the machine body 6a via the slide jack 7C. There is. At the front end of the machine body 6a, a boom cutter 9 is provided with an arrow C about the rotation axis CT5 in FIG.
The boom cutter is provided so as to be swingable in the directions D and F in the directions E and F around the rotation axis CT6 in FIG. At the tip of 9, a cutter 9a capable of crushing and excavating rocks such as natural ground 20 is provided in a shape of a truncated cone and fixed to a boom cutter shaft portion 9b. As shown in FIG. 4, a screw blade 9c is provided on the outer circumference of the boom cutter shaft portion 9b so as to convey the rock, that is, the rock of the cutting face 20a crushed by the cutter 9a to the rear in the direction of arrow B. Is provided rotatably in the directions of arrows P and Q around the center of the boom cutter shaft portion 9 as a gathering ring 10 for slipping recovery at the rear of the screw blade 9c.
It is provided so as to be attached to the base of b. The shear collected in the gathering 10 is further transported to the rear via the conveyor 11 provided on the side of the machine body 6a, and is transported to the outside of the tunnel 25 by an appropriate shear transport means.

By the way, on the upper portion of the machine body 6a, two canopy jacks 12, 12 arranged in the directions of arrows A and B are arranged.
However, the cylinders 12a are mounted in a lined manner, and the front body 2 is attached to the upper portion of each canopy jack 12.
A canopy 12b formed in the shape of a kamaboko along the inner peripheral surface of the canopy portion of A has arrows C and D through a cylinder 12a.
It is provided so that it can be moved and driven in the vertical direction, which is the direction. As shown in FIG. 3, side jacks 15 and 15 are provided on both sides of the machine body 6a in the directions of arrows E and F, respectively.
It is mounted in such a manner that a is supported on the inner surface of the front body 2A, that is, the machine body 6a and the front body 2A are connected to the inner circumferential direction of the tunnel through the canopy jacks 12 and 12 and the side jacks 15 and 15. It is configured so that it can be joined and separated.

Now, as shown in FIG. 4, the rear body 2B
A plurality of elliptical elliptical rings 16 erected by erectors 30 are connected to the rear of the so as to line up in the directions of arrows A and B without gaps between adjacent elliptical rings 16 and 16. A water stop plate, fastening bolts, etc. are appropriately constructed in such a manner that the plurality of connected elliptical rings 16 are densely integrated with each other. The erected elliptical ring 16A, which is laid on the left side in the drawing, of the elliptical ring 16 that has already been lining-built by the erector 30 and is structurally integrated, that is, the laid elliptical ring 16A is laid inside the rear torso 2B. It is arranged so as to enter from the rear (right side in the figure) of the rear body 2B. At the lower end portion in the arrow A direction of the installed elliptical ring 16A arranged at the most distal end, the already-constructed existing elliptical ring 16A and the newly installed carry-in elliptical ring 16B are joined together. The segment supporting means 29 is provided so as to be fixed to the bottom portion 2B ₁ . The backfill layer 21 is formed on the outer side in the circumferential direction of the elliptical ring 16 in such a manner that the ground 20 is excavated in a horseshoe-shaped cross section so that a gap is formed between the rock 20 and the elliptical ring 16 having the oval cross section. The mortar 2 is provided on the backfill layer 21 via a grout pump 23 or the like.
2 etc. are filled. Therefore, assuming that the mortar 22 is now hardened and the lining is completed, the rear body 2B
A tunnel 25 that has already been lined is connected to the rear of the. Moreover, between the outer shell 2 and the natural ground 20 in such a manner that the overburden is unavoidably formed in the natural ground 20 excavated by the excavator 6 between the lining tunnel 25 and the face 20a. A temporary void 21 'is formed in the inner wall of the inner wall 21. The temporary void 21' is filled with a primary backing material 26 such as sand and foam polystyrene beads.

Since the present invention has the above configuration,
When constructing a tunnel, first, the tunnel excavation device 1 is used to excavate the soft rocky ground 20. That is, the front sheet pile 5 supports the rocks of the face 20a so that they cannot fall, and the leg jack 3A is projected to push the outer shell 2 through the outer shell leg 3 in the direction of arrow C to support the natural ground 20. To do. Further, the canopy jack 12 is pressed and loaded, and the ram 12c is pushed out in the direction of the arrow C to push the canopy 12b against the canopy portion of the front body 2A. Further, the side jacks 15 and 15 are loaded under pressure to the rams 15c and 15c.
Is pushed out in the directions of arrows E and F to integrate the machine body 6a with the front body 2A. Then, the fuselage 6a has a front body 2A.
Since it is supported by the surface pressure of the entire peripheral surface of the machine body 6, the machine body 6a is firmly fixed and supported so as not to move in the front body 2A sufficiently against excavation resistance and vibration generated in the boom cutter 9. It In this way, when the machine body 6a is firmly supported by the front body 2A, the excavator 6 is driven so that the cutter 9a abuts on the face 20a, and the boom cutter 9 is moved to the arrows C, D ,.
The rock face 2 is crushed by rocking in the E and F directions while being rotated so that the excavated cross section has a horseshoe shape.
While excavating 0a, the excavator 6 is advanced in the direction of arrow A by the excavation stroke. Simultaneously with or before the excavation of the face 20a, the temporary void 21 'is filled with a primary backing material 26 such as foamed polystyrene beads by a suitable pressure from the arch 25a through the pressure feed pipe 27. To do. As a result, the primary backing material 26 allows the deformation of the natural ground 20 to some extent while preventing skin from falling off from the overburdened portion, and also exerts a stress acting outward from the outer shell 2 along the outer peripheral surface. It is possible to dispersively support the natural ground 20 through the primary backing material 26.

By the way, as described above, the boom cutter 9
Using hard rock to excavate soft rocky ground 20
When you encounter, you will blast and destroy the hard rock layer and proceed. Therefore, in order to open a hole for blasting in the hard rock layer,
As shown in FIG. 1, a drill boom 40 according to the present invention is attached to a boom cutter 9 for use. First, the cutter grasping device 41 of the drill boom 40 is attached to the cutter 9 of the boom cutter 9.
Attach to a. That is, as shown in FIG.
The main bodies 42e and 42e are bent and opened in the directions of arrows R'and S'with the center of the axis CT2 of the pin 44 as the center to be wider than the width of the cutter 9a. Then, the axial center CT2 is set to the rotation center CT1.
The inner surface 42c of the chuck 42 so as to be orthogonal to
The chuck 42 until it contacts the outer peripheral surface 9d of the cutter 9a.
Insert. After insertion, the main bodies 42e, 42 of the chuck 42
e is an arrow R ", S" centered on the axial center CT2 of the pin 44
It is bent in the direction to be closed, and the grasping portion 42b is used to cut the cutter 9a.
Grab In that state, the bracket 42 of the chuck 42
Insert the gripping pin 53 into the holes of d and 42d
As shown in FIG. 1, the drill boom 40 can be fixed to the cutter 9a of the boom cutter 9 of the excavator 6 by appropriately tightening the nuts 54 and 42d. Next, rock drill 5 according to the position of the blasting hole.
Position the 0 drill 51. That is, first, the main jack 45 is moved to the arrow K, L for positioning on the surface of the face.
By appropriately projecting and retracting in the direction, the main boom 4
Since 6 swings in the directions of arrows R and S, positioning in the radial direction (directions of arrows C and D in the example shown by the chain double-dashed line in FIG. 1) can be performed. Further, by appropriately rotating the boom cutter 9 in the directions of arrows P and Q about the rotation axis CT1, the main boom 46 rotates in the directions of arrows P and Q, so that positioning in the circumferential direction (direction perpendicular to the plane of the drawing) can be performed. .. Therefore, the rock drill 50 can be moved to an arbitrary position by combining the radial movement of the main jack 45 and the circumferential movement of the boom cutter 9. In addition, the boom cutter 9 may be swung in the vertical and horizontal directions (arrow C and D directions and arrow E and F directions in FIG. 3) around the axial centers CT5 and CT6 as necessary. Next, the drill 5 of the rock drill 50
After the positioning of No. 1 on the face of the face, rock drilling axis C of the drill 51
Position T4 to match the drilling direction of the blasting hole. That is, the sub-boom 47 swings in the directions of arrows T and U by appropriately retracting and retracting the sub-jack 48 in the directions of arrows M and N.
Rock drilling axis CT of drill 51 of rock drilling machine 50 attached to a
4 can be positioned in the drilling direction of the blasting hole. In this way, when the positioning is completed, the drill 51 of the rock drill 50 is driven to open a hole. As described above, by moving the boom cutter 9, the main boom 46, and the sub-boom 47, holes for blasting are provided at necessary locations,
In addition, a hard rock ground is excavated by loading an explosive into the hole and blasting. After the excavation of the hard rock ground is completed, the chuck 42 is opened in the arrow R'and S'directions about the axial center CT2 to the width of the cutter 9a or more to open the drill boom 40 from the cutter 9a of the excavator 6. It is removed and the excavator 6 returns to a state where it can be excavated. Then, the excavator 6 is used to excavate the soft rock ground again.

In this way, soft rocky and hard rocky ground 2
After drilling 0, then the canopy jack 12, 12
The drive shoe 7B is driven by driving the slide jack 7C while the side jacks 15 and 15 are under pressure load.
With respect to the machine body 6a in the direction of arrow A by a moving stroke. Then, the pressure of the leg jack 3A is released, the outer shell leg 3 is contracted, the outer shell leg 3 is floated from the invert 25b, and the canopy jack 1
2 and 12 are pressure-released so that the canopy 12b and 12b together with the front body 2A are attached to the canopy portion of the front body 2A by the primary backing material 26.
And separate it in the direction of arrow D. In this way, the machine body 6a on which the front body 2A is mounted and supported is advanced in the direction of arrow A such that the fixed shoe 7A follows the drive shoe 7B that precedes the moving stroke. Next, when the front torso 2A and the fuselage 6a move forward, the rear torso 2B is left behind without advancing, and the relay torso 2C exits from the rear end of the front torso 2A in a state of retreating from the front torso 2A. ing. Therefore, face 2
When a is moved forward and the ground 20 of the newly cut open portion is appropriately stabilized, by driving the outer shell jack 2D, the driving stroke of the outer shell jack 2D is obtained by taking a reaction force from the existing ring 16. The rear body 2B is moved in the direction of arrow A while pulling the rear body 2B toward the front body 2A side by an amount.

In this way, when the rear body 2B is advanced in the excavation direction by the drive stroke of the outer shell jack 2D, the erected elliptical ring located at the extreme end of the constructed elliptical ring 16, that is, the end portion in the direction of arrow A. A gap is formed between the ring 16A and the rear end of the rear body 2B, that is, the end portion in the arrow B direction, by the amount of the forward movement of the rear body 2B. Therefore, the carry-in elliptical ring 16B is attached so as to move forward with the rear body 2B or in front of it.
As shown in FIG. 4, the tunnel 25 is placed in a horizontally long shape from the outside of the tunnel and mounted on a carrier truck and brought into the rear body 2B.
Then, the erector 30 is used to turn over the elliptical ring 16 so as to match the laid state of the elliptical ring 16 and connect the loaded elliptical ring 16B to the laid elliptical ring 16A so as to be installed on the segment support means 29. Build 25.

[0018]

As described above, the present invention has the main body such as the main boom 46 and the sub boom 47, and the cutter gripping portion such as the cutter gripping device 41 is provided at one end of the main body with the cutter 9a of the excavator 6. The rock drill 50 is detachably provided to the main body, and the rock drill 50 is provided in the main body. Therefore, by fixing the cutter gripping portion to the cutter 9a of the drill machine 6, the rock drill 50 is drilled. Since the excavator 6 can be mounted on the cutter 9 a of the machine 6, the rock drill 50 can be supported. Further, since the rock drill 50 can be moved together with the cutter 9a by moving the cutter 9a with the rock drill 50 attached,
The rock drill 50 can be positioned on the face. In this way, the rock drill 50 can be positioned using the excavator 6 as a base, so that a drill jumbo can be substituted. Therefore,
When encountering hard rocky ground, it is possible to open a hole for loading blasting dynamite etc. just by mounting the removable drill boom 40 on the loaded soft rock excavator 6. The quality excavator 6 can be carried out of the constructed tunnel to eliminate wasteful work such as exchanging the excavator such as carrying a new drill jumbo.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment in which a drill boom according to the present invention is attached to a tunnel excavation device.

FIG. 2 is a perspective view showing an embodiment of a cutter gripping device of the drill boom shown in FIG.

FIG. 3 is a cutaway plan view showing an embodiment of a tunnel excavation device capable of mounting the drill boom shown in FIG.

FIG. 4 is a cutaway side view of the tunnel boring device shown in FIG. 3.

[Explanation of symbols]

 6 ... Excavator 9a ... Cutter 41 ... Cutter gripping part (cutter gripping device) 46 ... Main boom 47 ... Sub-boom 50 ... Rock drill

Claims (1)

[Claims] 1. A removable drill boom having a main body, a cutter mounting portion being detachably attached to one end of the main body with respect to a cutter of an excavator, and a rock drilling machine being provided in the main body. ..