JPH09144469A - Drilling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set the insertion angle of a drilling means at a proper angle by ocularly observing the place of the drilling of the drilling means accurately by simple constitution. SOLUTION: A rocking frame 26 borne in a rockable manner by a support shaft 25 installed on the main frame 23 of a self-propelled type truck and extended in the longitudinal direction, an operating deck 29 pivotally supported at the upper end section of the rocking frame 26 by a horizontal shaft 33 mounted in parallel with the support shaft 25, a rocking driving means 28 rocking the rocking frame 26 while using the support shaft 25 as a support and displacing the rocking frame 26 from an upright state to an inclined state, and a horizontal holding means 36 driving the operating deck 29 so as to maintain the operating deck 29 under a horizontal state are mounted on an operating section 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling device used for tunnel construction or the like.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Patent Laid-Open No. 4-11192, a boom oscillatably supported on a self-propelled carriage and a boring means provided at the tip of the boom. An operating section provided with a control box for remotely controlling the boom and the boring means, and an operator who is on a deck of the operating section remotely operates the boom and the boring means to perform a tunnel construction section. There is known a boring device for boring the outer wall portion of a tunnel by pressing a boring tool against a rock or the like.

Further, in order to accurately set the drilling position and the tilt angle by the drilling means, as shown in FIG. 9, a lift cylinder 56 provided on a self-propelled carriage 55 drives the operating portion 57 to move up and down. Then, when drilling the upper portion of the tunnel 39, the operating portion 57 is raised as shown by the phantom line, and when drilling the lower portion of the tunnel 39, the operating portion 5
By lowering 7 as indicated by the solid line, the operation unit 5
It is practiced to bring the viewpoint of a worker who is on the deck 58 of No. 7 closer to the drilling position.

[0004]

In the boring device having the above-mentioned structure, when boring the side portion of the tunnel, the operating portion cannot be brought close to the boring position. It is difficult to install it at an appropriate angle, and in order to prevent the drive part of the drilling means from coming into contact with the wall surface of the tunnel, the above-mentioned tilt angle must be set larger than necessary, and the amount of excess digging There is a problem that it is unavoidable that there are many.

In view of the above circumstances, the present invention provides a hole drilling device capable of accurately visually checking the hole drilling position of the hole drilling means and setting the inclination angle to an appropriate angle with a simple structure. Is.

[0006]

The invention according to claim 1 is
A boom installed on the self-propelled trolley, a drive means for driving the boom, a drilling means provided at the tip of the boom, and a control box for remotely operating the drive means and the drilling means are provided. In a drilling device having an operating portion, a swing frame oscillatably supported by a support shaft extending in the front-rear direction provided on the self-propelled carriage, and a horizontal frame installed parallel to the support shaft. An operation deck pivotally supported on the upper end of the rocking frame by a shaft, rocking driving means for rocking the rocking frame with the support shaft as a fulcrum to displace the upright state to the tilted state, and the rocking driving means. The operation section is provided with a horizontal holding means for driving the operation deck so as to maintain the operation deck in a horizontal state.

According to the above construction, when the side portion of the tunnel or the like is drilled by the drilling means, the rocking drive means is laterally driven so that the rocking frame of the operating portion is inclined. As a result, the operation deck is displaced to a position close to the side portion of the tunnel, and the operation deck is horizontally driven by the horizontal holding means operating in conjunction with the swing drive means with the vertical axis as a fulcrum. Will be maintained in a state.

According to a second aspect of the present invention, in the boring device according to the first aspect, a lower frame having a lower end pivotally supported by a support shaft provided on a self-propelled carriage, and along the lower frame. The rocking frame is composed of an upper frame that is supported so as to be able to move up and down, and an elevating drive means for driving the lower frame up and down along the upper frame is provided.

According to the above construction, when drilling a position away from the self-propelled carriage, such as the upper part of the tunnel, by the drilling means, the lifting drive means drives the upper frame of the rocking frame to move upward. By sliding and displacing, the operation deck is displaced to a position close to the upper part of the tunnel or the like.

[0010]

1 shows an embodiment of a hole drilling device according to the present invention. This boring device is supported by a self-propelled carriage 3 having traveling wheels 1 and an outrigger 2 and a vertical axis 4 provided at a front portion of the self-propelled carriage 3 as a fulcrum so as to be swingable in the left-right direction. A boom supporting portion 5, a boom 7 supported in a vertically swingable manner with a horizontal shaft 6 provided on the boom supporting portion 5 as a fulcrum, drive means 8 for driving the boom 7, and a boom 7 Operation unit 1 provided with a drilling means 9 provided at the tip end of the
And 1. The self-propelled carriage 3 is provided with a pair of left and right booms 7 and an operating portion 11, and each boom 7 is configured to be individually driven by the drive means 8.

The drive means 8 for the boom 7 is a boom raising / lowering means 12 comprising a hydraulic cylinder or the like installed between the front end of the boom support 5 and the lower surface of the center of the boom 7.
And a boom turning means 13 including a hydraulic cylinder and the like installed between the side portion of the boom support portion 5 and the front portion of the self-propelled carriage 3. Then, the boom elevating means 12 swings and displaces the boom 7 up and down with the horizontal axis 6 as a fulcrum to adjust the vertical installation angle, and the boom turning means 13 uses the vertical axis 4 as a fulcrum. The boom support portion 5 and the boom 7 are pivotally displaced to the left and right to adjust the installation angle of the boom 7 in the left-right direction, thereby changing the drilling position by the drilling means 9.

As shown in FIG. 2, the boring means 9 has a guide cell 15 having a foot pad 14 at its tip.
A drift drive 16 slidably supported along the guide cell 15, and a swing drive means 17 including a hydraulic rotary motor for rotationally driving the guide cell 15.
By swinging and displacing the guide cell 15 about the horizontal axis 18 provided on the turning drive means 17, the inclination angle α of the drifter 16, that is, the installation angle of the drifter 16 with respect to the horizontal direction is adjusted. The tilt angle adjusting means 19 including a hydraulic cylinder is provided.

The turning drive means 17 of the hole making means 9 is also provided.
Are swingably supported by a vertical axis 20 and a horizontal axis 21 provided at the tip of the boom 7. Then, the swing drive means 22 composed of a hydraulic cylinder or the like provided at the tip of the boom 7 swings the swing drive means 17 and the guide cell 15 up and down with the horizontal shaft 21 as a fulcrum, and the drifter 16 moves in the vertical direction. The installation angle is adjusted, and the swing drive means 17 and the guide cell 15 are vertically swung about the vertical axis 20 as a fulcrum by a boom swing means (not shown) such as a hydraulic cylinder to move the drifter 16 in the left-right direction. The installation angle is adjusted.

As shown in FIGS. 3 and 4, the operating section 11 includes a support bracket 24 attached to a side surface of a main frame 23 constituting the self-propelled carriage 3, and front and rear portions provided on the support bracket 24. Support shaft 2 extending in the direction
5, a swing frame 26 swingably supported by the support shaft 25, an elevating / lowering drive means 27 composed of a hydraulic cylinder provided in the swing frame 26, and a swing motion using the support shaft 25 as a fulcrum. A swing drive means 28 formed of a hydraulic cylinder for swinging the moving frame 26 laterally, and an operation deck 29 connected to the upper end of the swing frame 26.
The control box 10 is installed on the front end of the operation deck 29.

The swing frame 26 of the operating portion 11 has a lower frame 30 made of a square pipe material, the lower end of which is pivotally supported by the supporting shaft 25, and a lower frame 30 which is inserted into the lower frame 30 and slidably supported. And an upper frame 31 made of a square pipe material or the like, the lower end of the elevating drive means 27 is connected to the lower frame 30, and the upper end is connected to the upper frame 31. The elevating and lowering drive means 27 elevates and lowers the upper frame 31 along the lower frame 30 to move the operation deck 29 connected to the upper end of the upper frame 31 to the lower position shown by phantom lines in FIG. 3 and the solid line in FIG. It is configured to be displaced up and down with respect to the raised position shown by.

The swing drive means 28 has its lower end pivotally supported by the outer end of the support bracket 24 and its upper end pivotally supported by a bracket 32 attached to the lower frame 30 of the swing frame 26. The above-mentioned support shaft 2
By swinging and displacing the swing frame 26 laterally around the fulcrum 5, the installation angle can be changed between the upright state shown by the solid line in FIG. 4 and the inclined state shown by the phantom line in FIG. Is configured.

The operation deck 29 has a deck bracket 34 provided at the front thereof pivotally supported on the upper end of the upper frame 31 by a horizontal shaft 33 installed parallel to the support shaft 25, and Deck bracket 3
It is supported by a horizontal holding means 36 which is composed of a hydraulic cylinder that connects a side end of the upper frame 4 and an upper bracket 35 projecting from the upper end of the upper frame 31.

The horizontal holding means 36 is controlled by a control means (not shown) so as to operate in conjunction with the swing drive means 28, and the piston of the swing drive means 28 is shown by the phantom line in FIG. When the rod is retracted and the swing frame 26 is tilted, the piston rod of the horizontal holding means 36 is projected and the outer end of the operation deck 29 is driven upward, so that the bottom of the operation deck 29 is horizontal. Is configured to maintain. Further, as shown by the solid line in FIG. 4, when the piston rod of the swing drive means 28 is in the protruding state and the swing frame 26 is in the upright state, the piston rod of the horizontal holding means 36 is in the retracted state and the operation deck. Driving the outer end of 29 downward will keep its bottom horizontal.

Further, on the operation deck 29, a lifting ladder 37, which is used when an operator rides on the operation deck 29, is provided so as to project downward from the rear end portion, and the operation ladder 29 is mounted on the operation deck 29. A handrail 38 for ensuring the safety of the worker is provided so as to project upward from the side portion.

In order to carry out the tunnel boring work by the boring device having the above-mentioned structure, the operator who mounts on the operation deck 29 using the lifting ladder 37 is installed in the control box 10 of the operation console 11. By operating the operating lever or the like to operate the drive means 8 of the boom 7, the hole drilling means 9 is moved to the hole drilling position, and then the installation position of the hole drilling means 9 and the tilt angle α are finely adjusted. At the same time, the drifter 16 is operated to start drilling.

When drilling the upper portion of the tunnel 39, the operator on the operation deck 29 is allowed to raise the upper frame 31 of the rocking frame 26 by the raising and lowering drive means 27 of the operating portion 11. In order to make it easy to confirm the drilling position of the hole means 9 and the insertion angle α, the operation deck 2
9 is raised as shown by the solid line in FIG. When drilling the side portion of the tunnel 39, the swing drive means 28 is used.
By swinging and displacing the swing frame 31 to the side, the operation deck 29 is indicated by a phantom line in FIG. 5 so that the drilling position of the drilling means 9 and the insertion angle α can be easily confirmed. , Move it to the side.

As described above, the swing frame 26 swingably supported by the support shaft 25 extending in the front-rear direction provided on the self-propelled carriage 3, and the operation provided on the upper end of the swing frame 26. Since the deck 29 and the swing drive means 28 for swinging the swing frame 26 laterally about the support shaft 25 as a fulcrum are provided in the operating portion 11, the tunnel 39 is provided.
When boring the side portion of the, the rocking frame 26 is laterally rocked and displaced by the rocking drive means 28, so that the viewpoint of the operator who has boarded on the operation deck 29 of the operation part 11 can be changed. It can approach the drilling position.

Therefore, the operator installed on the operation deck 29 accurately visually observes the installation position of the drilling means 9 and the tilt angle α to appropriately adjust the bit, and the bit provided on the drilling means 9 is adjusted. The rod can be accurately pressed at a position corresponding to the outer shape of the tunnel 39 for drilling, and the insertion angle α of the drilling means 9 can be set to an optimum angle to effectively reduce the amount of excess digging. You can

A horizontal shaft 33 installed parallel to the support shaft 25 causes the operation deck 29 to swing the swing frame 26.
The swinging frame 26 is tilted by a horizontal holding means 36 which is rotatably supported on the upper end of the swinging driving means 28 and which is driven in conjunction with the swinging driving means 28 to maintain the operation deck 29 in a horizontal state. Since the bottom of the operation deck 29 is maintained in a horizontal state by rotating the operation deck 29 with the horizontal shaft 33 as a fulcrum in accordance with the operation, the safety of the operator riding on the operation deck 29 is ensured. At the same time, the work of tilting the swing frame 26 to the side can be performed.

In the above embodiment, the swing frame 26 of the operating portion 11 has a lower frame 30 whose lower end is pivotally supported by a support shaft 25, and an upper frame 31 which is vertically movable along the lower frame 30. And the upper frame 31 is driven up and down by the lifting drive means 27, the tunnel 39
When the upper part of the hole is drilled, the upper frame 31 is raised by the elevating and lowering drive means 27 so that the operator on the operation deck 29 can be brought close to the drilling position of the drilling means 9. Further, when boring the side portion of the tunnel 39, the amount of lateral movement of the operation deck 29 can be adjusted by vertically moving the upper frame 31.

The lifting drive means 27 for driving the swing frame 26 up and down, the swing drive means 28 for tilting the swing frame 26, and the horizontal holding means 36 for maintaining the operation deck 29 in the horizontal state are the hydraulic pressures. The present invention is not limited to the cylinder, but may be a screw feed mechanism driven by an electric motor, an air cylinder, or the like.

Further, in the above embodiment, the two-boom / deck type drilling device in which the pair of left and right booms 7 and the operating portion 11 are provided on the self-propelled carriage 3 has been described, but the boom 7 and the operating portion 11 are described. It is possible to variously change the number of the above-mentioned embodiments without being limited to the above-mentioned embodiment. For example, the three operating portions 11 are provided on the self-propelled carriage 3, and the three booms 7 corresponding thereto are provided. 3 is provided
In a hole drilling device such as a boom 3 deck type, the left and right operation parts 11 are swingably supported by a swing frame 26, and the swing frame 26 is laterally moved by a swing drive means 28 including a hydraulic cylinder or the like. It may be configured to be oscillated.

Further, as shown in FIGS. 6 to 8, the main frame 23 of the self-propelled carriage 3 is fixed to the central operation portion 11a provided in the boring device such as the 3 boom 3 deck type. A first frame 40 mainly composed of C-shaped steel, and a second frame 42 mainly composed of C-shaped steel provided with a roller 41 rolling along the inner surface of the side wall portion of the first frame 40.
And a support frame 45 including a third frame 44 mainly composed of C-shaped steel provided with a roller 43 that rolls along the inner surface of the side wall of the second frame 42, and an upper portion of the third frame 44. The operation deck 29 and the control box 10 attached to the control box 10 may be lifted and lowered to drive the control box 10 up and down.

The lower end of the elevating drive means is connected to the lower connecting member 46 of the first frame 40, and the upper end thereof is connected to the bracket 48 protruding from the upper connecting member 47 of the second frame 42. The hydraulic cylinder 49, a chain 51 having one end locked to the upper connecting member 46A of the first frame 40 and the other end locked to the lower connecting member 50 of the third frame 44, and the second frame. Four
The sprocket lot 52 is rotatably supported by the second upper connecting member 47 and on which the chain 51 is wound.

When the second frame 42 is driven upward by the hydraulic cylinder 49, the sprocket 52 provided on the second frame 42 rises and the sprocket 52 becomes a moving pulley to drive the sprocket 52. Since the force is transmitted to the third frame 44 via the chain 51, the third frame 44 further rises by a distance corresponding to the amount of rise of the second frame 42, which is twice the driving amount of the hydraulic cylinder 49. That is, a lift amount of a distance corresponding to twice the protrusion amount of the piston rod can be obtained.

Therefore, the operation deck 29 to which the third frame 44 is attached and the control box 10 are used without using the hydraulic cylinder 49 having a large driving amount.
When the hole is drilled in the upper part of the tunnel 39, the operation deck 29 is brought close to the upper part of the tunnel 39 to accurately visually check the installation position of the hole drilling means 9, and the drilling position and the tilt angle α are set. It can be adjusted appropriately.

When the operation deck 29 is constructed so as to be raised to a position close to the upper portion of the tunnel 39 as described above, in order to protect an occupant on the operation deck 29, the operation deck 29 is brought into contact with the upper portion of the tunnel 39. It is desirable to have a structure in which a stopper 53 that regulates the amount of rise of the operation deck 29 is provided.

[0033]

As described above, according to the first aspect of the invention, the swing frame is swingably supported by the support shaft provided in the self-propelled carriage and extending in the front-rear direction, and the support shaft. An operation deck pivotally supported on the upper end of the rocking frame by horizontal shafts installed in parallel, and a rocking drive means for rocking the rocking frame with the support shaft as a fulcrum to displace it from an upright state to an inclined state. Since the operation section is provided with horizontal holding means for driving the operation deck so as to maintain the operation deck in a horizontal state in conjunction with the swing drive means, the operation deck is provided when drilling a side portion of the tunnel or the like. It is possible to tilt the displacement of the swing frame to the side and bring the viewpoint of the operator on the operation deck closer to the drilling position while ensuring the safety of the operator on the upper side.

Therefore, an operator on the operation deck accurately observes the installation position and the tilt angle of the drilling means and appropriately adjusts them to adjust the bit rod provided in the drilling means. The hole can be drilled by accurately pressing it at a position corresponding to the outer shape of the tunnel, and the amount of excess digging can be effectively reduced by setting the insertion angle of the drilling means to the optimum angle.

The invention according to claim 2 is such that a lower frame having a lower end pivotally supported by a support shaft provided on a self-propelled carriage, and an upper frame vertically supported along the lower frame. Since the rocking frame is constituted by and the elevating drive means for elevating and lowering the upper frame along the lower frame is provided, the elevating drive means raises the upper frame when drilling the upper part of the tunnel. The operator on the operation deck can be brought closer to the drilling position of the drilling means, and the amount of protrusion of the upper frame is changed when drilling the side part of the tunnel to change the side of the operation deck. There is an advantage that the amount of movement to one side can be adjusted.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a hole drilling device according to the present invention.

FIG. 2 is a side view showing the configuration of a hole making unit.

FIG. 3 is a side view showing a main part of a hole drilling device.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an explanatory diagram showing a drilled state of a tunnel.

FIG. 6 is a side view showing another embodiment of the hole drilling device according to the present invention.

FIG. 7 is a front view of the hole drilling device.

FIG. 8 is an exploded perspective view showing a configuration of a support frame of an operation unit.

FIG. 9 is an explanatory view showing a conventional example of a hole drilling device.

[Explanation of symbols]

 3 Self-propelled trolley 7 Boom 8 Boom drive means 9 Drilling means 10 Control box 11 Operation part 25 Support shaft 26 Swing frame 27 Lifting drive means 28 Swing drive means 29 Operation deck 30 Lower frame 31 Upper frame 33 Horizontal axis

[Procedure amendment]

[Submission date] January 25, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

3. A boom installed on a self-propelled carriage,
Drive means for driving the boom of the
The drilling means provided, the driving means and the drilling means
Operation part with a control box for remote control
In a drilling device having and, installed on a self-propelled carriage
The first frame and the free movement up and down along the first frame
A second frame supported by and along this second frame
Is supported so that it can be moved up and down, and an operation deck is attached.
3rd frame, and the lower end is the above 1st frame
It is connected and the upper end is connected to the second frame.
And the one end of which is engaged with the first frame.
And the other end is connected to the third frame.
Rotatably supported by the chain and the second frame
Sprocket around which the above chain is wrapped
And a lifting drive means composed of
Drilling device.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

In the boring device having the above-mentioned structure, when boring the side portion of the tunnel, the operating portion cannot be brought close to the boring position. It is difficult to install it at an appropriate angle, and in order to prevent the drive part of the drilling means from coming into contact with the wall surface of the tunnel, the above-mentioned tilt angle must be set larger than necessary, and the amount of excess digging There is a problem that it is unavoidable that there are many. Further, in the case where the lift cylinder provided with the operation unit is configured to directly drive up and down as described above, it is necessary to use a lift cylinder having a large drive amount in order to increase the lift amount of the operation unit, There is a problem that the lifting drive unit becomes large.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

According to the above construction, when drilling a position away from the self-propelled carriage, such as the upper part of the tunnel, by the drilling means, the lifting drive means drives the upper frame of the rocking frame to move upward. By sliding and displacing, the operation deck is displaced to a position close to the upper part of the tunnel or the like. According to a third aspect of the present invention, there is provided a boom installed on a self-propelled carriage, a driving means for driving the boom, a drilling means provided at a tip portion of the boom, the driving means and the grinding means. In a drilling device having an operation section provided with a control box for remotely controlling the hole means, a first frame erected on a self-propelled carriage and supported so as to be vertically movable along the first frame. A second frame, and a third frame supported along the second frame so as to be vertically movable and having an operation deck attached thereto,
A hydraulic cylinder having a lower end connected to the first frame and an upper end connected to the second frame, and one end locked to the first frame and the other end connected to the third frame. And a chain connected to the second
The frame is rotatably supported by the frame and is provided with a lifting drive means including a sprocket around which the chain is wound. According to the above configuration, when the second frame is driven upward by the hydraulic cylinder, the sprocket provided on the second frame rises, and the sprocket becomes a moving pulley, so that the driving force is transmitted through the chain. It is transmitted to the third frame, and the third frame further rises by a distance corresponding to the amount of rise of the second frame.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

The invention according to claim 2 is such that a lower frame having a lower end pivotally supported by a support shaft provided on a self-propelled carriage, and an upper frame vertically supported along the lower frame. Since the rocking frame is constituted by and the elevating drive means for elevating and lowering the upper frame along the lower frame is provided, the elevating drive means raises the upper frame when drilling the upper part of the tunnel. The operator on the operation deck can be brought closer to the drilling position of the drilling means, and the amount of protrusion of the upper frame is changed when drilling the side part of the tunnel to change the side of the operation deck. The invention according to claim 3 has an advantage that the amount of movement to one side can be adjusted, and the first frame erected on the self-propelled carriage and the first frame And a second frame that is supported so as to be able to move up and down, a third frame that is supported so as to be able to move up and down along the second frame, and a third frame to which an operation deck is attached, and a lower end portion thereof is connected to the first frame. At the same time, a hydraulic cylinder having an upper end connected to the second frame, a chain having one end locked to the first frame and the other end connected to the third frame, and the second frame When the second frame is driven upward by the hydraulic cylinder, the lifting and lowering drive means, which is rotatably supported by the hydraulic cylinder and is provided with a sprocket around which the chain is wound, is provided so as to cope with the amount of rise of the second frame. The third frame is further raised by the distance to be performed. Therefore, without using a hydraulic cylinder with a large driving amount, when the operation deck mounted on the third frame is largely lifted and the upper part of the tunnel is drilled, the operation deck is brought close to the upper part of the tunnel. Accurately check the installation position of the hole means,
The drilling position and the tilt angle can be adjusted appropriately.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] Explanation of sign

[Correction method] Change

[Correction contents]

[Explanation of Codes] 3 Self-propelled Cart 7 Boom 8 Boom Drive Means 9 Drilling Means 10 Control Box 11 Operating Unit 25 Support Shaft 26 Swing Frame 27 Elevating Drive Means 28 Swing Driving Means 29 Operation Deck 30 Lower Frame 31 Upper frame 33 Horizontal axis 40 First frame 42 Second frame 44 Third frame 49 Hydraulic cylinder 51 Chain 52 Sprocket

Claims (2)

[Claims] 1. A boom installed on a self-propelled trolley, a drive means for driving the boom, a drilling means provided at the tip of the boom, and a remote control of the drive means and the drilling means. In the drilling device having an operating section provided with a control box for controlling the swinging frame, the swinging frame is swingably supported by a supporting shaft provided in the self-propelled carriage and extending in the front-rear direction, and is parallel to the supporting shaft. An operation deck pivotally supported on the upper end of the rocking frame by a horizontal shaft installed on the rocking frame, and rocking drive means for rocking the rocking frame about the supporting shaft as a fulcrum to displace it from the upright state to the tilted state. A hole drilling device, characterized in that the operation section is provided with horizontal holding means for driving the operation deck so as to maintain the operation deck in a horizontal state in conjunction with the swing drive means. 2. A swing frame is constituted by a lower frame whose lower end is pivotally supported by a support shaft provided on a self-propelled carriage, and an upper frame which is vertically movable along the lower frame. 2. The drilling device according to claim 1, further comprising an elevating and lowering drive means for elevating and lowering the upper frame along the lower frame.