JPH0738461Y2 - Blast hole drilling machine for excavation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to a boring machine for boring a blast hole for excavating a steel tower foundation.

[Conventional technology and its technical problem]

For example, when excavating the foundation of a steel tower for power supply, it is common to excavate by blasting when the soil is a rock layer.When carrying out such a construction method, a hole to which dynamite is to be attached should be drilled prior to blasting. It is necessary to drill radially on the bottom. Conventionally, when performing such a blast hole drilling operation, a method has been adopted in which an operator descends to the bottom of the pit and manually drills using a manual drill.

However, the blast holes are usually 25 to 35 mmφ and the depth is 1 m or more.
Fifty must be made at the bottom of the mine. Therefore, it is very hard labor, takes time and labor, and drills blast holes → blast →
The efficiency of the alternate blasting method of the alternate method that goes through the cycle of slipping out → footwear was reduced. In addition, the work environment is poor because the work is exposed to severe vibration, dust, noise, etc., and there is a problem in terms of safety measures.

The present invention was devised to solve the above-mentioned problems, and its purpose is to automatically and efficiently drill a large number of blast holes at the bottom of a pit for steel tower foundation excavation. An object is to provide a blast hole drilling machine for excavation.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention is a means for radially digging a large number of blast holes for dynamite loading in a pit bottom A dug from the ground, and a beam mount is provided on a liner plate covering the inner surface of the dig holes. And a frame-shaped slide rail that is supported by an intermediate portion of the beam via a bearing and is attached to the beam, and is rotatable via a gear mechanism. A lower mechanism, which is mounted on the slide rail and has a pedestal slide hydraulic actuator attached to the slide rail, and a slide pedestal that is movable in the longitudinal direction of the slide rail via a transmission mechanism, and a frame erected on the slide pedestal. And extends toward the inside of the slide rail frame, attaches a tool to the tip, and attaches the tool to the hydraulic actuator for rotation and the hydraulic actuator for impact. The rod has a rod that receives power transmission from a chute, and a boring machine body that includes a slide that is connected to the rod and the hydraulic actuator and that can move back and forth along the frame by a hydraulic actuator for moving back and forth. Hydraulic actuator, gantry slide hydraulic actuator, rotary hydraulic actuator, striking hydraulic actuator and advancing / retreating hydraulic actuator connected via hydraulic hoses, and a valve for starting / stopping each hydraulic actuator, a rotary hydraulic actuator, It is equipped with a valve for adjusting the combination of the number of rotations and the number of impacts of the hitting hydraulic actuator, and a remote control device including valves for controlling the operating speeds of the turning hydraulic actuator, the platform slide hydraulic actuator, and the advancing / retreating hydraulic actuator. It is made up of It

〔Example〕

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the whole of a blast hole drilling machine for excavation according to the present invention, in which A is a pit bottom (enlarged part) which is drilled to a required depth from the ground, and a hole wall is earth-sealed by a line plate B. ing. C is a drilling machine according to the present invention, D is a hydraulic unit arranged on the ground E, F is a remote control device combined with the hydraulic unit D, G is an air compressor, and H is a dust collector arranged at the bottom A. .

The boring machine C comprises a lower mechanism 1 and a boring machine body 2,
The lower mechanism 1 includes a beam 3 supported at both ends by a liner plate B, a slide rail 4 mounted on the beam at an intermediate portion so as to be horizontally rotatable by 360 °, and movable along the longitudinal direction of the slide rail 4. And a slide stand 5.

The drilling machine main body 2 includes a frame 6 vertically supported by the slide mount 5 and a tool such as a bit 8 at the tip.
A rod 7 to which is attached, and a slide 10 having a drilling driving unit 9 for rotating and / or striking the rod 7 and movable back and forth along the frame 6.

2 to 5 show the details of the lower mechanism 1 and the boring machine body 2. First, the beam 3 is horizontally supported by the liner plate B in a hollow shape using a beam mount. That is, as shown in FIG. 2a, the liner plate B
A flange b extending into the mine is provided at the lower end of the beam, and a pair of beam pedestals 1 are provided on the line passing through the center of the flange b.
1, 11 'are arranged and firmly fixed by bolts 12.

Yoke portions 110, 110 ', 30, 30' are provided at the beam mounts 11, 11 'and at both ends in the beam longitudinal direction, respectively. Bolt holes 111 provided in these yoke portions 110, 110', 30, 30 'and bolts 13 in the long holes 300 are provided. The beam 3 is horizontally installed on the liner plate B by inserting and tightening. And long hole 300
The center of the slide rail 4 is aligned with the center of the mine by the position adjusting action of. The beam 3 has a fixed size in the embodiment, but may be expandable / contractible by, for example, a nesting type, if necessary.

The slide rail 4 has a rectangular frame shape as shown in FIGS. 2 and 3, and a swivel base 40 provided with a gear, for example, an internal gear 400 is provided at the center of the lower surface.
Is supported by a bearing mechanism 31 arranged at the center of the upper surface of the beam 3 so as to be rotatable through 360 ° about the vertical axis. The beam 3 has a turning hydraulic actuator (hydraulic motor) 32, a speed reducer 33, and the gear 40 as driving means.
A drive gear 34 that meshes with 0 is provided.

The slide mount 5 has wheels 50, 50 on the slide rail 4.
The slide rail 4 is equipped with a pedestal slide hydraulic actuator (hydraulic motor 42) and a speed reducer 43 at one end as drive means, and the output shaft position of the speed reducer 43. And the sprocket 44a, 44b is provided at a position opposite to the drive side.
A chain 45, whose both ends are connected to the slide base 5, is suspended.

The frame 6 of the boring machine main body 2 has a pair of left and right support columns 60 in the form of rails, and a pair of left and right legs 61 whose one end is connected to the upper side of the support columns 60. The lower end of 61 is supported by the slide base 5 via a bracket.

The slide 10 of the boring machine body 2 is mounted on the column 60 so as to be movable only in the longitudinal direction as shown in FIGS. An advancing / retreating hydraulic actuator (hydraulic motor) 62 is attached near the upper end of the strut 60, the output side of the hydraulic motor is connected to a speed reducer 63, and the output shaft of the speed reducer 63 and the sprocket 64a near the lower end of the strut 64a. , 64b are attached, a chain 65 is suspended between the sprockets 64a, 64b, and both ends thereof are fixed to the slide 10.

As shown in FIG. 4, the drilling driving unit 9 is composed of a rotary hydraulic actuator (hydraulic motor) 91 and a striking hydraulic actuator (hydraulic cylinder) 92, which are mounted on the slide 10 with a common airtight casing 90. It is held.

The rod 7 is parallel to the column 60, the lower end side of which is guided by an annular guide 66 provided on the column 60, and the axis of the rod 7 always faces the frame of the slide rail 4.

On the other hand, the rod upper end portion 70 extends into the airtight casing 90, and is fitted in a gear 911 that meshes with the drive gear 910 of the rotary hydraulic actuator 91 so as to be movable only in the axial direction by a spline or the like. Then, the hammer 920 fixed to the piston rod of the striking hydraulic actuator 92 faces in the axial direction of the rod upper end portion 70, and the rod 7 receives the striking force from the hammer 920 piston-moving by the operation of the striking hydraulic actuator 92. It is like this.

An air passage 71 having an opening at the upper end is formed at the center of the rod 7, and an air supply hole is provided in the airtight casing 90 in the vicinity thereof.
900 is provided, to which an air hose 9G from a compressor G installed on the ground E is connected, as shown in FIG. The tip of the air passage 71 penetrates the rod 7 to reach an injection hole (not shown) formed in the tool 8 and is ejected into the drill hole during drilling.

A dustproof cap 14 having a hole for advancing and retracting the rod 7 is attached to the drilled portion of the pit bottom A in an attachment manner, and the dustproof cap 14 is connected to the absorbing side of the dust collector H by a dust hose 14H.

As shown in FIGS. 1 and 6, the remote control device F is connected to the hydraulic unit D including the hydraulic pump P, while the turning hydraulic actuator 32, the gantry slide hydraulic actuator 42, and the slide advancing / retreating unit. Hydraulic actuator 6
2, hydraulic actuator 91 for rotating rod, hydraulic actuator 92 for striking, and hydraulic hoses 15a, 15b, 15c, 15d, 15
Connected by e, starting these hydraulic actuators
The stop and forward / reverse rotations, the speed, the rotation speed of the rod, and the hitting speed can be adjusted within a certain range.

More specifically, the remote control device F includes a rod rotation circuit unit F ₁ ,
A drilling circuit group consisting of a rod striking circuit unit F ₂ and a rod advancing / retreating circuit unit F _3, and a lower mechanism circuit group consisting of a drilling machine main body turning circuit unit F ₄ and a slide circuit unit F ₅ are provided. The two circuit groups are the main switching valves provided on the discharge side of the hydraulic pump P.
The pressure oil is selectively supplied by means of 16.

The rod rotation circuit F ₁ is provided with a forward / reverse switching valve 17, and the rod striking circuit F ₂ is provided with a start / stop switching valve 18 and a flow rate adjusting valve 180. It can be adjusted arbitrarily up to the maximum.
That is, when the adjustment dial 181 is turned to one side, the rotation speed of the rotary hydraulic motor 91 is increased, while the piston movement number of the striking cylinder 92 is decreased, and when the adjustment dial 181 is fully turned, the rod is not hit and the rod rotation speed is maximized. Reach Turning in the opposite direction reverses this relationship and minimizes rod rotation.

Next, the advancing / retreating circuit unit F ₃ has a forward / reverse switching valve 19, and
Flow rate adjusting valves 190a, 190b for adjusting forward and backward speeds
Pressure reducing valves 192a and 192b for advancing and retreating forces are provided, and the flow rate adjusting valves 190a and 190b are operated by adjusting dials (not shown).

The swing circuit section F ₄ is provided with a forward / reverse switching valve 20 and flow rate adjusting valves 200a, 200b for adjusting the swing speed, and the speed can be adjusted within a certain range by an adjusting dial (not shown). Similarly, the slide circuit portion F ₅ is also provided with forward / reverse switching valve 21 and flow rate adjusting valves 210a, 210b for adjusting the slide speed which are operated by an adjusting dial (not shown).

In this embodiment, the switching valves 17, 18 and 19 for drilling are manually operated valves, but they may be automatically operated by using solenoid valves or solenoid pilot hydraulic valves.

[Operation of Example]

When drilling the blast hole according to the present invention, the beam frame 11, 11 'is attached to the liner plate B as shown in FIG.
Attach the lower mechanism 1 with the hanging wire 22 from the ground to the pit, adjust the position so that the center of the beam, that is, the center of the slide rail 4 is aligned with the pit center, and place the beam 3 on the beam mounts 11 and 11 '. Link.

Next, as shown in FIG. 8 (b), the boring machine body 2 is lowered by the hanging wire 23, and the frame 6 is connected to the slide base 5 with bolts. Separately from this, a dust collector H is arranged at the pit bottom A.

Next, each hydraulic hose 15a, 15b, 15c, 15d, 15e is connected to a required position of the remote control device F, the dust collector H and the compressor G are connected by an air hose, and the dustproof cap 14 and the dust collector H are connected to the dust hose 14H. , And connect the compressor G and the air on-off valve 24 of the remote control device F to the air hose 25G.
And the air opening / closing valve 24, the boring machine body, and the drive unit 9
The air supply port 900 of is connected with the air hose 9G. With this, the set state as shown in FIG. 2 is obtained, and the axis of the tool 8 faces the frame of the slide rail 4.

Therefore, the next step is drilling. This work starts with the main switching valve 16
Is operated to supply the pressure oil from the hydraulic pump P to the lower mechanism group. At this time, no pressure oil is supplied to the drilling group. When the forward / reverse switching valve 20 and the adjustment dial are operated in this state, the turning hydraulic actuator 32 is normally or reversely rotated at a required speed, and the driving force is transmitted from the speed reducer 33 to the gears 34, 400. The slide rail 4 on which 2 is mounted pivots in a horizontal plane with the center of the bottom of the shaft as an axis, whereby the tool 8 is aligned in the inner circumferential direction.

Further, by operating the forward / reverse switching valve 21 and the adjustment dial, the gantry slide hydraulic actuator 42 is normally or reversely rotated at a required speed, and the driving force is transmitted from the speed reducer 43 to the sprockets 44a, 44b.
Also, since it is transmitted to the chain 45, the slide base 5 moves back and forth on the slide rail. As a result, the tool 8 moves within the frame of the slide rail 4, alignment in the downhole radial direction is performed, and the tool 8 is accurately positioned at the planned drilling position.

Therefore, if the dustproof cap 14 is placed at the planned drilling position and the forward / reverse switching valve 19 and the adjustment dial are operated, the advancing / retreating hydraulic actuator 62 rotates in the forward direction at a speed corresponding to the opening of the flow rate adjusting valve 190a, and the speed reducer. 63, the sprocket 64a, 64b, and the chain 65 cause the slide 10, the drive unit 9 and the rod 7 mounted thereon to descend along the support column 60, the tool 9 extends through the frame of the slide rail 4, and the tip ends Through the dustproof cap 14, the pit bottom A at the planned drilling position is reached.

At this time, if the forward / reverse switching valve 17 is operated to the forward rotation side, the pressure oil is supplied to the rotary hydraulic actuator 91, and the drive gear is
The rod rotates via 910 and gear 911. In parallel with this, when the open / close valve (cock) of the dust collector H and the remote control device F is opened, the air sent from the air supply port 900 is ejected from the tool 8 through the passage 71 of the rod 7.

Then, when the advancing / retreating actuator 62 is actuated again, a propulsive force is applied to the tool 8 to start drilling. At this time, since the air is ejected as described above, the chips are discharged from the entrance of the hole, and the dust cap 14 surrounding the chips has a suction force. Therefore, the dust hose 14H collects dust in the dust collector H. To be done. Therefore, there is no scattering of chips and drilling can be performed in a favorable environment.

If the tool hits the rocks during drilling and cannot be propelled, or if the amount of discharged soil is small, the start / stop switching valve 18 is operated to the start side. As a result, the striking hydraulic cylinder 92 operates, the piston rod and the hammer 920 reciprocate by a number corresponding to the opening degree of the flow rate adjusting valve 180, and striking force is applied to the rod 7 in the rotating state. As a result, the tool 8 has a motion form in which rotation and impact are combined, so that drilling proceeds efficiently.

Thus, when the drilling is performed to a predetermined depth, the operation of the advancing / retreating hydraulic actuator 62, the striking hydraulic actuator 92, and the rotating hydraulic actuator 91 is stopped by the switching valve, and the advancing / retreating hydraulic actuator 62 is driven in reverse. Raise the tool 8 and the rod 7. And the drive unit 9 is the pillar 60.
When it reaches the upper end, the forward / backward hydraulic actuator 62 is stopped and the air supply line is closed. This completes the drilling of one blast hole, so that the hydraulic actuator of the lower mechanism 1 can be selectively operated to move the drilling machine body 2 to the next planned drilling position, and the above operation can be repeated. .

As described above, since the movement and positioning of the tool 8 to the drilling position and the drilling work are all performed by remote control on the ground,
It is very safe because there is no danger associated with the movement of the drilling machine, there is no vibration due to drilling, and there is no exposure to cutting chips. In addition, since the actuator is a hydraulic drive system, there is no exhaust noise like in the case of engine type rock drills and pneumatic type rock drills, and the impact sound is not leaked to the outside because the impact part is covered. It is possible to create a good working environment.

[Effect of device]

According to claim 1 of the present invention described above, the following excellent effects can be obtained.

The slide base 5 can be moved along the longitudinal direction of the frame-shaped slide rail 4, and the slide rail 4 is connected to the beam 3
The rod 7 of the hole drilling machine main body 2 mounted on the slide mount 5 is supported by the bearing 31 at the intermediate part of the frame and is extended and retracted in the frame of the frame-shaped slide rail 4,
Further, the beam 3 can be narrowed in width. Therefore, the hole drilling range of the pit bottom A can be widened, the tool 8 can be freely moved to any position in the radial direction and the circumferential direction of the pit bottom A, and can be automatically drilled by rotating or / and striking. .

In addition, the turning actuator 32 for turning the slide rail 4, the gantry slide hydraulic actuator 42 for moving the slide pedestal 5, the rod 7 rotation actuator 91, the striking actuator 92, and the forward / backward actuator 62 are activated.・ A remote control device F on the ground equipped with a valve for stopping, a valve for adjusting the number of revolutions / striking, and a valve for speed control
Since it is connected with the hydraulic hose by a hydraulic hose, the movement and positioning of the tool 8 to the planned drilling position and the drilling work can be controlled by remote control on the ground outside the drilling hole including the speed. There is no danger associated with the movement of the boring machine, and there is no possibility of being exposed to chips without being affected by the vibration caused by boring. Therefore, the step of radially drilling a large number of blast holes in the pit bottom A for steel tower foundation excavation or the like can be performed very safely and efficiently.

Since the beam 3 for supporting the slide rail 4 on which the boring machine body 2 is mounted is laterally laid using the liner plate B for earth retaining the excavation hole wall, it is not affected by the unevenness of the pit bottom A and It can be easily set in the mine every cycle and has good workability.

Since each actuator is a hydraulic drive system, there is no exhaust noise unlike in the case of an engine type rock drill or a pneumatic rock drill, and a good working environment can be achieved in this respect as well.

According to claim 2 of the present invention, in addition to the above, the cutting dust is discharged from the entrance of the hole, and the dust cap 14 surrounding the cutting dust is attracted by the dust hose 14H.
Therefore, it is possible to obtain an excellent effect that it is possible to perform the drilling in a favorable environment without the scattering of the cutting chips.

[Brief description of drawings]

FIG. 1 is a side view showing an outline of a hole drilling device according to the present invention, and FIG. 2 is a partially cutaway side view of a hole drilling machine body according to the present invention.
2a is a partially enlarged view of the same, FIG. 3 is a partially cutaway plan view of the same, FIG. 4 is a partially cutaway side view of the striking / rotating mechanism of the boring machine shown in FIG. 1, and FIG. FIG. 6 is a front view, FIG. 6 is a circuit diagram of the remote control device according to the present invention, FIG. 7 is a perspective view of the same, and FIGS. 8 (a) and 8 (b) are side views showing the setting procedure of the present invention. B ... Liner plate, F ... Remote control device, 1 ... Lower mechanism, 2 ... Drilling machine body, 3 ... Beam, 4 ... Slide rail, 5 ... Slide mount, 6 ... Frame, 7
…… Rod, 8 …… Tool, 10 …… Slide, 14 …… Dustproof cap, 31 …… Bearing, 32 …… Swivel hydraulic actuator, 33,400 …… Gear, 42 …… Stand slide hydraulic actuator, 62 …… Advance hydraulic actuator, 71
... passage, 91 ... hydraulic actuator for rotation, 92 ... hydraulic actuator for striking

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, 26, Matsubara, Sakae 1-2031 Sakae, Naka-ku, Nagoya-shi, Aichi (56)

Claims (2)

[Scope of utility model registration request] 1. A means for radially digging a large number of blast holes for dynamite loading in a pit bottom A digging from the ground, comprising a beam mount 11,1 on a liner plate B covering the inner surface of the pit.
A beam 3 which is detachably mounted horizontally via 1 ', and a swinging hydraulic actuator 32 supported on a middle portion of the beam 3 via a bearing 31 and attached to the beam 3 and a swinging mechanism 33, 400. A possible frame-shaped slide rail 4 and a pedestal slide hydraulic actuator 42 mounted on the slide rail 4 and attached to the slide rail 4, and a slide pedestal 5 movable along the slide rail longitudinal direction via a transmission mechanism. The lower mechanism 1, the frame 6 erected on the slide base 5, and the slide rail 4 extend toward the inside of the frame, and the tool 8 is attached to the tip end of the rotary hydraulic actuator 91 and the impact hydraulic actuator 92. The rod 7 that receives power transmission and the forward / backward hydraulic actuator 62 that is connected to the rod 7 and the hydraulic actuators 91 and 92 are used to move the frame. And a drilling machine main body 2 including a slide 10 that can move back and forth along a shaft 6, and on the ground, the turning hydraulic actuator 32, a gantry slide hydraulic actuator 42, a rotary hydraulic actuator 91, and a striking hydraulic pressure. Actuator 92 and advancing / retreating hydraulic actuator 62 are connected via a hydraulic hose, and a valve for starting / stopping each hydraulic actuator and a combination adjustment of the number of revolutions and the number of impacts of the hydraulic actuator for rotation 91, the hydraulic actuator for impact 92 And a remote control device F including valves for controlling the operating speeds of the swing hydraulic actuator 32, the gantry slide hydraulic actuator 42, and the advancing / retreating hydraulic actuator 62, respectively. Hole machine. 2. The rod 7 has a passage 71 through which air introduced from the outside is ejected from the tip at the center, and the cutting chips are collected by the dust collector from the dustproof cap 14 arranged at the hole opening. The blast hole drilling machine for excavation according to claim 1, including a drilling machine.