JP2011080355A - Rotary table for rotary drilling machine, drilling device, and extracting method for drilling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary table device for a drilling machine which, when extracting the drilling machine becoming long with connected extended bodies from a drilled hole, allows the extended bodies to be extracted gradually by removing the extended bodies one after the other from the top side, so as to achieve the drilling work even at places where a large space cannot be secured above or around a drilling part. <P>SOLUTION: The rotary table device for the drilling machine (A) includes a lifting movable base (4) installed on a table base (1), a drive bush (2) which is mounted on the table base (1) and rotates a down-the-hole hammer, a connecting pin (7) which fixes and releases the down-the-hole hammer on/from the lifting movable base (4), an anti-drop stopper (8) which engages and releases the down-the-hole hammer to/from the drive bush (2), and a bore-witching instrument (6) which can pass a hammer extension body through when the bore is small, while passing a hammer body and the drive bush (2) through when the bore is large. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a rotary table for a rotary drilling machine, a drilling device, and a sampling method for a drilling machine. More specifically, in a drilling operation using a drilling machine that drills while connecting extension bodies such as down-the-hole hammers and earth augers, after the drilling operation is completed, a number of extension bodies are connected to become long. When removing the drilling machine from the drilling hole, it is possible to pull out the entire drilling machine while pulling up the drilling machine with a rotary table and removing the lifted drilling machine extension from the upper extension one by one. The present invention relates to a rotary table for a rotary drilling machine, a drilling device, and a method for extracting a drilling machine.

  A rotary drilling machine is used in the foundation work of a building. Typical examples of rotary drilling machines include down-the-hole hammers and earth augers. In the case of a down-the-hole hammer, an extension body (also referred to as a kelly rod) is sequentially connected to a hammer body disposed at the tip (lower end) to drill a hole while extending the entire length. In the case of an earth auger, a helical extension (also called a screw auger) is connected to the auger head in order to extend the hole, and the entire length is drilled.

  Here, a down-the-hole hammer will be described as an example of a drilling machine. The down-the-hole hammer is provided with a hammer bit at the tip, rotated in the axial direction by passing through a drive bush provided on a rotary table placed on the ground, and cut downward in a free-descent state due to its own weight. Make a hole.

As a conventional rotary table for guiding the down-the-hole hammer while rotating, there is a rotary table machine disclosed in Patent Document 1, for example.
This rotary table machine can rotate the hammer casing by the drive bush and the extension body by the grandchild bush to which the rotational force is transmitted from the drive bush. By connecting and extending the extension body, excavation by the hammer is possible. It is possible.

JP 2002-256788

When the down-the-hole hammer drills a certain depth, an extension body is connected to the upper end and the drilling operation is continued. In this way, a plurality of extensions are sequentially connected to obtain a drilling hole having a required depth.
Therefore, in drilling work, if there is a small crane that can hang the extension body even if there is an overhead line such as a viaduct or an elevated railway or an electric wire or telephone line, it can. If the extension is short and light, the extension can be transported and connected by human power.

  After the drilling operation is completed, it is necessary to pull out the down-the-hole hammer from the drilling hole. The long down-the-hole hammer connected with the extension body has an overall weight of more than a dozen tons, so it cannot be lifted unless it is a large crane.

  Therefore, at the site where a large crane cannot be used, such as under a viaduct or elevated railroad where the height to use a large clay cannot be secured, or at a site where an overhead wire such as an electric wire or telephone line is complicated, However, since the down-the-hole hammer cannot be pulled from the drilling hole, there is a problem that the drilling operation is practically impossible. This is the same not only in the down-the-hole hammer but also in other drilling machines that connect the extension body.

(Object of the present invention)
Accordingly, an object of the present invention is to provide a rotary table, a drilling device, and a drilling device for a rotary drilling machine that can extract a long and heavy drilling machine from a drilling hole even at a site where a large crane cannot be used. It is to provide a hole method.

  Means taken by the present invention to solve the above problems are as follows.

The present invention
A rotary table for a rotary drilling machine that drills the ground while rotating a drilling machine passed through a drive bush with the drive bush,
A drive base for rotating the hole drilling machine, and a table base provided with a drive means for driving the drive bush;
A lifting device which is provided on the table base and raises and / or lowers by holding a drilling machine;
A fall prevention means for stopping the drilling machine and preventing it from dropping when the drilling machine is lifted by the lifting device to remove the extension body at the upper part of the drilling machine;
Including
The elevating device has an elevating movable table and elevating drive means for elevating the elevating movable table, and the elevating movable table has a rotating body having a hole through which a hole drilling machine passes,
The rotating body rotates with the rotation of the drilling machine in a state where the drilling machine is fixed by a fixing means capable of fixing and releasing the fixing of the drilling machine passed through the hole.
It is a rotary table for rotary drilling machines.

The present invention
A table base placed directly or indirectly on the work surface;
An elevating movable base provided to move in the vertical direction with respect to the table base;
Elevating drive means for driving the elevating movable table;
A drive bushing provided on the table base for rotating an extension of the drilling machine in the axial circumferential direction;
Rotational drive means for driving the drive bush;
A rotating body having means capable of attaching and releasing the extension of the drilling machine to the movable movable table, and capable of rotating with the drilling machine attached;
Fall prevention means capable of engaging and disengaging the extension body of the hole drilling machine with respect to the table base or the drive bush;
With
It is a rotary table device for a rotary drilling machine.

The present invention
When the diameter is small, the movable body is provided with a diameter switching means that allows the extension body to pass through, and when the diameter is large, the drive bush attached to the hole drilling machine to be removed.
The drive bush is detachably attached to the table base, and includes an engagement unit that engages with the hole drilling machine from above to be integrated.
It is the rotary table device for the rotary drilling machine.

The present invention
When the diameter is small, the extension body can pass through, and when the diameter is large, the diameter switching means that can pass through the drive bush attached to the drilling machine has a pair of halved members, It is a structure that switches between a small diameter opening formed by combining half members and a large diameter opening that is provided in the elevating movable base and becomes effective when each half member is separated.
It is the rotary table device for the rotary drilling machine.

The present invention
Means capable of attaching and removing the extension of the hole drilling machine to and from the movable movable table are provided in parallel with the diameter line direction in the through hole provided in the half member and the extension of the hole drilling machine. It is constituted by a coupling pin that can be inserted in a state of passing through the through hole provided in the half member,
It is the rotary table device for the rotary drilling machine.

The present invention
A fall prevention means capable of engaging and releasing the extension of the drilling machine with respect to the drive bush is provided in the drive bush. A fall-preventing stopper capable of engaging in an engagement groove provided in a direction intersecting the axial direction on the outer peripheral portion of the extension body in a state of being mounted in an engagement recess provided in the drive bush; It is configured,
It is the rotary table device for the rotary drilling machine.

The present invention
A rotary table device for a rotary drilling machine according to any of the above,
A drilling machine,
Drilling device.

The present invention
It is a method of extracting the hole drilling machine from the hole after drilling the ground while rotating the hole drilling machine with a rotary table,
A step of lifting the drilling machine in the drilling hole with a lifting device provided in the rotary table,
Stopping the drilling machine so that it does not fall to the bottom of the hole, and releasing the holding of the drilling machine by the lifting device in this state,
Removing the extension from the top of the drilling machine;
A step of lowering the lifting device to hold the drilling machine,
By sequentially repeating each of the above steps, the entire drilling machine is gradually extracted while removing the extension of the drilling machine one step at a time from the upper extension.
This is a method of sampling a hole drilling machine.

The present invention
It is a method of extracting the drilling machine connecting the extension body from the drilling hole after drilling the ground,
Using the lifting device provided on the rotary table, pull up the drilling machine to the position where the uppermost extension can be removed,
Including removing the uppermost extension after providing a fall prevention so that the pulled drilling machine does not fall,
By sequentially repeating the above procedure, the entire drilling machine is gradually extracted while removing the extension of the drilling machine step by step from the upper extension.
This is a method of sampling a hole drilling machine.

  Examples of the hole drilling machine according to the present invention include a down-the-hole hammer and an auger screw, but are not limited to these as long as the ground can be drilled while rotating.

(Function)
The operation of the rotary table device for a rotary drilling machine and the drilling device according to the present invention will be described.
Here, the constituent elements used in the description are assigned in correspondence with the reference numerals given to the respective parts in the embodiments described later. These reference numerals are the same as the reference numerals described in the claims of the claims. Similarly, it is only for the purpose of facilitating understanding of the contents, and the meaning of each component is not limited to the above-described parts.

  The rotary drilling machine rotary table device (A) (hereinafter sometimes simply referred to as a rotary table device) is first installed at a position where drilling is performed on the work surface (ground). Then, as in the work using the conventional rotary table device, drilling is performed while rotating the drilling machine (9) with the drive bush (2), and the extension body (97) is lifted with a small crane and sequentially connected. Drill to the required depth by adding. When performing the drilling operation, it is not usually necessary to fix the drilling machine to the rotating body (43).

When the drilling operation is completed, the drilling machine (9) is extracted from the drilling.
First, the uppermost extension (97) of the hole drilling machine (9) is attached to the movable lifting table (4) of the lifting device (400) by the fixing means (6, 7).
Next, the lift movable table (4) is raised to a required height by the lift drive means (5, 5a). As a result, the drilling machine (9) is also lifted by the amount corresponding to the rising stroke.

  In this state, the fall prevention means (8) engages, for example, the second extension (97) with the drive bush (2) of the table base (1), for example, from above the hole drilling machine (9), and falls. Fix in the vertical direction so that it does not. Thereafter, the attachment of the extension body (97) to the movable movable table (4) by the fixing means (6, 7) is released. Even if the attachment is released in this way, the hole drilling machine (9) is fixed to the drive bush (2) of the table base (1) by the action of the fall prevention means (8) and does not fall.

Then, the lift movable base (4) is lowered by the lift drive means (5), and the second extension body (97) from the top of the drilling machine (9) is lifted movable base (6, 7) ( Attach to 4).
Next, the fall prevention means (8) that engages and fixes the uppermost extension (97) to the drive bush (2) is released. Even if the fall prevention means (8) is released, the drilling machine (9) has the second-stage extension (97) from the top attached to the lift movable table (4) by the fixing means (6, 7). Therefore, it does not fall, but for example, the drive bush (2) is in a free state in the vertical direction (downwardly downward).

  The uppermost extension (97) is lifted by the crane and separated from the lower extension (97). After the separated extension body (97) is lowered to a predetermined position, the crane suspension is removed from the extension body (97) and returned to its original position. Then, the hanging tool is attached to the extension body (97) at the top of the hole drilling machine (9).

  Thereafter, the process from the step of raising the hole drilling machine (9) to the step of attaching the hanging tool to the extension body (97) at the uppermost part of the hole drilling machine (9) is repeated, and the uppermost extension body (97 ) In order to shorten the drilling machine (9) and raise the main body (90). In addition, when the removed extension body (97) is small, it can be moved by human power.

When the number of extension members (97) reaches the required number (usually two), remove the uppermost extension member (97) in the same manner as described above, and then return the suspension to its original position. Attach to the extension (97).
Then, the main body (90) is lifted until it comes out of the drilling hole, and the main body (90) is shifted from the drilling hole formed on the work surface and placed on the work surface. Then, the rotary table device (A) is removed from the remaining drilling machine (9).

Thus, according to the rotary table device (A), as explained in each of the above steps, when removing the long hole drilling machine (9) connected to a number of the extension bodies (97) from the hole, The work to raise the hole drilling machine (9) stepwise has fixing means (6, 7) that can attach and detach the extension body (97) and is driven by the elevating drive means (5). Can be carried out using the movable table (4). As a result, the crane only needs to be used to lift the extension body (97) to be removed, so a large crane is not necessary, and the drilling machine (9) can be extracted using a small crane. .
Even when adjusting the drilling speed (drilling speed of the drilling machine) according to the ground condition, the drilling speed is adjusted with the drilling machine suspended by the lifting device provided in the rotary table device. be able to.

  When the diameter is small, the extension body (97) can be passed through the movable table (4), and when the diameter is large, the maximum diameter of the hole drilling machine (9) and the drive bush (2) can be passed. Means (6) are provided, and the drive bush (2) is detachably attached to the table base (1), and engages with the main body (90) of the drilling machine (9) from above. For example, the drive bush (2) is integrated with the main body (90) by lifting the main body (90) of the drilling machine (9). Thus, it can be removed from the rotary table device (A) through the diameter switching means (6) having a large diameter.

According to the present invention, when extracting the drilling machine connecting the extension body from the drilling hole after drilling the ground, the drilling machine is installed using the lifting device provided in the rotary table device. The entire drilling machine can be gradually extracted while pulling up and removing the extension of the drilling machine step by step from the upper extension.
Moreover, also when adjusting a drilling speed according to the state of a ground, a drilling machine can be suspended by the lifting / lowering apparatus provided in the rotary table apparatus, and a drilling speed can be adjusted.
In this way, work that was conventionally done with a large crane was done with the lifting device provided in the rotary table device, so there is no need for a large crane, and only a large crane can enter the upper part of the perforated part and around it. Even in a place where a large space cannot be secured, a drilling operation using a drilling machine can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS Front view explanatory drawing which shows embodiment of the rotary table apparatus for rotary type drilling machines which concerns on this invention. The side view of the rotary table apparatus for rotary drilling machines. The top view of the rotary table apparatus for rotary drilling machines shown in FIG. (A) shows the structure of the aperture switching tool provided on the movable movable table, and is a perspective explanatory view showing a state in which each coupling pin is mounted and the hammer extension is fixed, and (b) is an illustration of the upper frame member and the opening portion. The partial perspective view which shows a structure. The disassembled perspective explanatory drawing of the state which showed the structure of the aperture switch provided in the raising / lowering movable stand, and removed each connecting pin. The disassembled perspective explanatory view of the state which showed the structure of the aperture switch provided in the raising / lowering movable stand, removed each coupling pin, and rotated the half member upward. The perspective view of the state which showed the structure of the drive bush provided in the table base, and was engaged so that a fall prevention stopper might be attached and the lowermost hammer extension may not fall. The exploded perspective explanatory view in the state where the structure of the drive bush provided in the table base was shown and the stopper for fall prevention was removed. The exploded perspective explanatory view which shows the structure of the drive bush provided in the table base, and shows the state which has passed the hammer extension body of the intermediate part in the state which removed the stopper for fall prevention. The longitudinal cross-sectional explanatory drawing which shows the use condition of the drilling apparatus which has a rotary table apparatus for rotary type drilling machines. AA sectional drawing in FIG. BB sectional drawing in FIG. It is explanatory drawing which shows the structure of the engagement recessed part and engagement recessed hole of a drive bush, (a) is a partial side view, (b) is II partial sectional drawing in (a). Explanatory drawing which shows the procedure which pulls out a down the hole hammer from a hole. Explanatory drawing which shows the procedure which pulls out a down the hole hammer from a hole. Explanatory drawing which shows the procedure which pulls out a down the hole hammer from a hole. Explanatory drawing which shows the procedure which pulls out a down the hole hammer from a hole. Explanatory drawing which shows the procedure which pulls out a down the hole hammer from a hole. Explanatory drawing which shows the procedure which pulls out a down the hole hammer from a hole. Explanatory drawing which shows the procedure which drives a down-the-hole hammer in a soft ground. The longitudinal cross-sectional explanatory drawing which shows the use condition of the other drilling apparatus which has a rotary table apparatus for rotary drilling machines. CC sectional drawing in FIG. DD sectional drawing in FIG. Explanatory drawing which shows the engagement state of the screw and coupling pin of a hammer extension body.

  The present invention will be described in detail based on the embodiments shown in the drawings.

  The rotary drilling machine B1 is composed of a rotary drilling machine rotary table device A and a down-the-hole hammer 9 (the whole is shown in FIG. 10) which is a drilling machine. The drilling machine not only combines the rotary drilling machine rotary table apparatus A and down-the-hole hammer 9, but also the rotary drilling machine rotary table apparatus A and an earth auger, auger screw, auger head, etc. You can also. The structure of the down-the-hole hammer 9 will be described later.

Please refer to FIG. 1 to FIG.
The rotary drilling machine rotary table device A includes a table base 1 that is directly or indirectly placed on a work surface (GL) and a lifting device 400 provided on the table base 1.
The table base 1 includes a base portion 10. At the four corners of the base portion 10, extendable legs 11 that can expand and contract downward are provided. Each telescopic leg 11 expands and contracts as a rod of a hydraulic cylinder (not shown) built in the case 12 advances and retreats. Further, around the base portion 10, steps (steps) 13 are provided at two opposite positions (see FIG. 3).

  Inner guide pillars 14 are vertically fixed adjacent to the inner upper sides of the telescopic legs 11 and the case 12 at the four corners on the upper side of the base portion 10. Each inner guide column 14 has a square outer cross-sectional shape. An upper frame member 15 is fixed to the upper end portion of each inner guide column 14 in a direction (horizontal direction) perpendicular to each inner guide column 14 so as to connect the inner guide columns 14. The upper frame member 15 is U-shaped in plan view, and a required pair of adjacent inner guide columns 14 (in FIG. 3, the upper and lower inner guide columns 14) are open portions 150 (FIGS. 3 and 4 (b)). The upper frame member 15 is provided with two through holes 151 through which hydraulic cylinders 5 and 5a described later are passed in the vertical direction.

  In addition, a casing 30 (see FIGS. 7 to 9) that constitutes the rotary drive device 3 is provided on the upper portion of the base portion 10. The casing 30 is provided with a rotation receiver 32 so that it can rotate via a bearing (not shown) such as a ball bearing. That is, a gear device 33 (see FIG. 10) that transmits the rotational force of the hydraulic motor 31 that is a prime mover to the rotary receiver 32 is provided in the casing 30, and the rotary receiver 32 is driven to rotate by this. .

Reference is also made to FIG. 10 described later.
The rotary receiver 32 includes a cylindrical fitting portion 321 that is fitted into a mounting hole 301 provided on the upper surface side of the casing 30, and a flange portion that is provided on the upper portion and has a diameter larger than the diameter of the mounting hole 301. 322. A step portion 323 for inserting and mounting the drive bush 2 described later in detail is provided on the upper end portion on the inner peripheral surface side of the fitting portion 321 over the entire circumference. Further, on the upper surface side along the edge portion of the step portion 323, engagement protrusions 324 are fixed at four locations at equal intervals in the circumferential direction (see FIGS. 7 to 9). Each engagement protrusion 324 is provided toward the center in the diameter line direction of the rotary receiver 32.

The drive bush 2 engages with a hammer extension 97 of the down-the-hole hammer 9 described later, and rotates the down-the-hole hammer 9 in the axial circumferential direction. The drive bush 2 is inserted into the rotary receiver 32 from above, and a flange portion 23 described later is placed on the step portion 323, and can be pulled out upward.
Further, the drive bush 2 includes a fitting portion 20 that fits in the inner peripheral portion of the rotary receiver 32, and an upper tube 21 and a lower tube 22 that are provided on the upper and lower portions of the fitting portion 20 in a required length.

  A flange portion 23 having a diameter slightly larger than the diameter of the insertion portion 20 is provided on the outer peripheral portion between the insertion portion 20 of the drive bush 2 and the upper cylinder 21. The outer diameter of the flange portion 23 is formed to be slightly smaller than the inner diameter of the step portion 323 of the rotary receiver 32. Engagement recesses 24 that engage with the engagement protrusions 324 are provided at four locations at equal intervals in the circumferential direction on the outer peripheral portion of the flange portion 23.

  In addition, on the lower side of the upper cylinder 21, engagement concave holes 25 are provided at two locations at equal intervals in the circumferential direction. Each engagement concave hole 25 is provided in a direction perpendicular to the axial direction of the upper cylinder 21 (horizontal direction), and a hole 250 (see FIG. 13) penetrating the inner peripheral surface is formed in the central portion.

  As shown in FIG. 12 and FIG. 13B, the inner periphery of the drive bush 2 is provided with engagement longitudinal grooves 26 parallel to the axial direction at four locations at equal intervals in the circumferential direction. An engagement strip 972 provided on the hammer extension 97 of the down-the-hole hammer 9 and an engagement strip 920 of the air tank portion 92 are engaged with each engagement longitudinal groove 26. In addition, the number of the engagement vertical grooves 26 is not limited to four, and is appropriately provided according to the number of the engagement strips 920 and 972 provided in the down-the-hole hammer 9 described later.

  A fall prevention stopper 8 is detachably mounted in each engagement concave hole 25. The fall prevention stopper 8 includes a curved portion 80 and insertion portions 81 and 82 provided continuously on both sides thereof (see FIGS. 8 and 9). The curvature of the inner peripheral portion of the curved portion 80 is formed substantially the same as the curvature of the outer peripheral portion of the drive bush 2. The insertion portions 81 and 82 are provided in parallel to each other, and are formed with a thickness that can be inserted into the respective engagement concave holes 25 with almost no gap. Reference numeral 83 denotes handles provided at two locations.

  When the fall prevention stopper 8 is inserted into each engagement concave hole 25, a part of the inside of the insertion portions 81 and 82 penetrates and protrudes through the hole 250 to the inner peripheral portion of the drive bush 2. Then, the protruding portion engages with the engagement groove 973 provided in each engagement strip 972 of the hammer extension body 97 of the down-the-hole hammer 9 passed through the drive bush 2, and the down-the-hole hammer 9 falls. To prevent.

  The drive bush 2 is configured such that the lower cylinder 22 is inserted into the rotation receiver 32, the fitting portion 20 is accommodated in the inner peripheral portion of the rotation receiver 32, and the four engagement recesses 24 of the flange portion 23 are formed on the rotation receiver 32. The flanges 23 are mounted on the stepped portions 323 by engaging with the respective engaging protrusions 324. As a result, the drive bush 2 rotates integrally with the rotary receiver 32 driven by the rotary drive device 3.

  Further, the engagement recess 25 provided in the drive bush 2 and the fall prevention stopper 8 constitute fall prevention means (strictly speaking, on the outer peripheral portion of the hammer extension body 97 of the down-the-hole hammer 9 described later). Including an engaging groove 973 of each engaging strip 972 provided). With this drop prevention means, the hammer extension body 97 of the down-the-hole hammer 9 can be engaged with and released from the drive bush 2.

Please refer to FIG. 1, FIG. 2 and FIG.
The elevating device 400 includes the inner guide columns 14, the elevating movable table 4, hydraulic cylinders 5, 5 a, the diameter switching tool 6, and the coupling pins 7 described below.
Each inner guide column 14 is attached with a movable movable table 4 so as to be movable in the vertical direction. Outer guide cylinders 41 that can be slidably fitted into the respective inner guide pillars 14 are provided at the four corners of the base portion 40 of the elevating movable table 4 so as to protrude downward.
The movable movable table 4 can move in the vertical direction with the outer guide cylinders 41 fitted to the inner guide columns 14. A step 46 is provided on the side of the base portion 40 facing the hydraulic motor 31.

  The hydraulic cylinders 5 and 5a, which are raising and lowering driving means, are provided obliquely adjacent to the inner guide column 14, and the cylinder part is fixed to the base part 40 with the rod part facing downward (FIG. 1, FIG. (See FIG. 10). The tip of the rod part is fixed to the base part 10 of the table base 1. With this structure, the lift movable table 4 can be driven up and down by the hydraulic cylinders 5 and 5a.

  A through hole 42 (see FIG. 10) is provided in the center of the base portion 40 of the elevating movable table 4 so as to penetrate in the vertical direction. A rotating body 43 is attached to the through hole 42 so as to be rotatable in the axial circumferential direction with a bearing (not shown) such as a ball bearing interposed. The rotating body 43 includes a cylindrical main body portion 430 having a center hole 432 having a large diameter and a circular flange portion 431.

  Bearings 44, 44 a are provided on the upper surface of the flange portion 431 of the rotating body 43 at two locations (positions facing each other) at equal intervals in the circumferential direction. Pin passing receptacles 45 and 45a are provided at two positions at the position where the angle is formed. Pin passage holes 45 and 45a are respectively provided with pin passage holes 450 at two locations.

  The diameter switching tool 6 is attached to the bearings 44 and 44a. The diameter switching tool 6 can pass the hammer extension body 97 when the diameter is small (when a through-hole 62 described later is effective), and when the diameter is large (when the center hole 432 of the main body 430 of the rotating body 43 is effective): Specifically, when the hammer body 90 is pulled out, the hammer body 90 of the down-the-hole hammer 9 and the drive bush 2 fitted on the outside thereof can be passed.

  The aperture switching tool 6 includes half members 60 and 60a attached to bearings 44 and 44a, respectively. The half members 60 and 60a include a hole forming portion 601 having a quadrangular cross section and a semicircular arc shape, and mating portions 602 provided on both sides thereof. The half members 60, 60a are attached from the substantially horizontal position by attaching the protruding piece 603 provided at the central portion on the outer peripheral side of the hole forming portion 601 to the bearings 44, 44a by the pins 604 passed in the lateral direction. It can be turned up and down in the range up to the vertical position.

The half members 60 and 60a are arranged so that the end surfaces of the mating portion 602 are close to each other and face each other at a horizontal position parallel to the upper surface of the flange portion 431 (see FIGS. 4 and 5). In addition, pin holes 605 are respectively provided on the outer surfaces of the mating portions 602 of the half members 60 and 60a.
Then, the half members 60, 60a can be fixed by inserting the pins 61 from the pin through holes 450 of the pin through receptacles 45, 45a into the respective pin holes 605 in a horizontal state (when the diameter is small).

  In this state, a through-hole 62 that is a small-diameter opening having a smaller diameter than the center hole 432 of the main body 430 is formed in the inner peripheral part of the half members 60 and 60a. That is, the aperture switching tool 6 is formed by raising each half member 60, 60 a and a small diameter through hole 62 formed by tilting each half member 60, 60 a to form a ring, and each half member 60, 60 a standing up. In this structure, the center hole 432 of the large-diameter main body 430 can be switched.

  Further, in the half members 60 and 60a, pin through holes 63 and 63 and pin through holes 63a and 63a are respectively provided on both sides of the protruding piece 603 of the hole forming portion 601 with a predetermined interval. The axial direction of each pin through hole 63, 63a is parallel to the diameter line direction of the main body 430. In the pin through holes 63, 63, 63a, 63a provided in a total of four locations, the coupling pin 7 can be passed between the two pairs of pin through holes 63, 63 and the pin through holes 63a, 63a facing each other. .

  Each coupling pin 7 is inserted into the insertion hole 974 of the hammer extension 97 that is passed through the diameter switching tool 6. That is, the pin through holes 63, 63, 63 a, 63 a provided in the half members 60, 60 a and the respective connecting pins 7 attach and detach the hammer extension body 97 of the down-the-hole hammer 9 to the movable lift 4. Configure the means that can.

Here, the structure of the down-the-hole hammer 9 that forms the drilling device B1 together with the rotary table device A for the rotary drilling machine will be described with reference to FIGS. 7 to 9 and FIG. 10 described later.
The down-the-hole hammer 9 has a hammer body 90. The hammer body 90 has a structure in which a mechanism portion 91 and an air tank portion 92 having a cylindrical outer shape are connected. One or more hammer bits 93 are provided at the lower end of the mechanism portion 91. On the outer peripheral portion of the mechanism portion 91, soil discharging grooves 94 are provided in the vertical direction at five locations at equal intervals in the circumferential direction. A reinforcing member 95 for preventing wear is also provided in the vertical direction between the soil removal grooves 94.
In addition, square rod-like engagement strips 920 are vertically attached to the outer peripheral portion of the air tank portion 92 at equal intervals in the circumferential direction, and a hammer extension body 97 is connected to the center of the upper surface of the air tank portion 92. A hexagonal rod 96 is provided.

The down-the-hole hammer 9 can be extended to a required length by sequentially connecting a hammer extension 97 to the upper part of the hammer body 90.
The used hammer extension bodies 97 have the same shape. The hammer extension body 97 is formed to have a required length (slightly longer than the air tank portion 92 in the present embodiment), and the outer diameter of the main body portion 971 is the same as that of the air tank portion 92.

  On the outer peripheral portion of the main body portion 971 of the hammer extension body 97, square bar-like engagement strips 972 are attached at four locations at equal intervals in the axial circumferential direction. On the lower side of each engagement strip 972, an engagement groove 973 is provided so as to divide the engagement strip 972. Further, on the upper side of the main body portion 971, insertion holes 974 are provided at two locations in parallel with the diameter line direction so as to penetrate between the outer peripheral surfaces.

  In the center of the upper portion of the main body portion 971 of the hammer extension body 97, a hexagonal rod-shaped rod 98 for connecting another hammer extension body is provided. In addition, a hexagonal hole-like insertion hole 99 into which the rod 96 (or the rod 98 of another hammer extension body 97) is fitted is provided at the lower center of the hammer extension body 97. Note that, on the outer peripheral portion of the rod 96 (the same applies to the rod 98), engagement grooves 901 are provided in parallel on required surfaces at opposite positions.

  Further, in the lower part of the main body portion 971 of the hammer extension body 97, there are two insertion holes 902 that are parallel to the diameter line direction and sandwich the insertion hole 99 between the outer peripheral surfaces. It is provided through. Around the hole openings on both sides of each insertion hole 902, two groove portions 903 are provided in parallel with the diameter line direction of the main body portion 971 (see FIG. 9).

  In the hammer extension body 97, the fitting holes 99 are fitted into the rods 96 (or the rods 98), and the engagement pins 904 are inserted into the respective insertion holes 902, whereby the respective engagement pins 904 are inserted into the respective engagement grooves 901. It can be engaged and this prevents it from coming off and can be connected to the hammer body 90 or another hammer extension 97 (see FIG. 10). In FIG. 9, the lower hammer extension 97 represents a state in which the engagement pin 904 is not inserted into the insertion hole 902. Further, a hanging tool 900 described later can be connected to the hammer extension body 97 in substantially the same manner.

(Function)
With reference to FIG. 10 thru | or FIG. 20, the effect | action of the drilling apparatus B1 comprised with the rotary table apparatus A for rotary type drilling machines and the down-the-hole hammer 9 is demonstrated.

  The usage method and operation of the rotary table device A for rotary drilling machines are as follows. The height of the table is set by appropriately placing a table 19 made of H-steel around the drilled hole. Using a small crane, the hammer body 90 of the down-the-hole hammer 9 is placed on the work surface located at the center of the base 19. Next, the rotary table device A for the rotary drilling machine is also suspended using the crane, and the engagement longitudinal groove 26 of the drive bush 2 is aligned with the engagement strip 920 of the air tank unit 92, so Set it down.

  The driving operation of the down-the-hole hammer 9 is the same as the conventional method using the rotation of the down-the-hole hammer 9 by the drive bush 2 and the free descent due to the weight of the down-the-hole hammer 9, so that the description is omitted.

(1) When the drilling operation by driving the down-the-hole hammer 9 is completed, the operation of extracting the down-the-hole hammer 9 from the drilling hole 100 is performed.
First, the movable movable table 4 is adjusted up and down, and the height of the insertion hole 974 of the uppermost hammer extension 97 of the down-the-hole hammer 9 is set to the height of the pin through holes 63 and 63a of the half members 60 and 60a of the movable movable table 4. The height is adjusted (see FIG. 14A).

(2) One coupling pin 7 is inserted through the pin through hole 63 of one half member 60, the insertion hole 974 of the hammer extension body 97, and the pin through hole 63 of the other half member 60a in this order. The other coupling pin 7 is inserted through the pin through hole 63a of one half member 60, the insertion hole 974 of the hammer extension body 97, and the pin through hole 63a of the other half member 60a in this order. Thereby, the hammer extension body 97, that is, the down-the-hole hammer 9 is connected to the movable movable table 4 (see FIG. 14B).

(3) The rod of each hydraulic cylinder 5 is extended and the movable movable table 4 is raised by a required stroke. At this time, the down-the-hole hammer 9 is rotationally driven by the drive bush 2 so as to be easily removed, and the rotating body 43 rotates together with the down-the-hole hammer 9.
Then, by adjusting the expansion and contraction of the rod of each hydraulic cylinder 5, an engagement groove 973 of the hammer extension body 97 of the down-the-hole hammer 9 rising together with the movable lift table 4 is provided on the table base 1. To the engagement recess hole 25 of the engagement recess 24 (see FIG. 15A).

(4) The fall prevention stopper 8 is inserted into the engagement recess hole 25 of the drive bush 2 and is engaged with the engagement groove 973 of the hammer extension body 97 through the hole 250 of the engagement recess hole 25. Thereby, the hammer extension body 97 is fixed to the drive bush 2 of the table base 1 in the vertical direction (see FIG. 15B).

(5) Pull out the two connecting pins 7 from the pin through holes 63 and 63a of the half members 60 and 60a and the insertion hole 974 of the hammer extension 97. Thus, even if the connecting pin 7 is pulled out, the down-the-hole hammer 9 is fixed to the drive bush 2 of the table base 1 by the action of the fall-preventing stopper 8 and does not fall. And the raising / lowering movable stand 4 is lowered | hung to the lowest part by each hydraulic cylinder 5 (refer Fig.16 (a)).

(6) In the same manner as in step (2), each coupling pin 7 is inserted into the pin through holes 63 and 63a of the half members 60 and 60a and the insertion hole 974 of the second-stage hammer extension body 97 from above. As a result, the down-the-hole hammer 9 is coupled to the movable movable table 4. Next, the fall prevention stopper 8 that fixes the uppermost hammer extension 97 to the drive bush 2 is extracted. Even when the fall prevention stopper 8 is removed, the down-the-hole hammer 9 does not fall because the hammer extension 97 is attached to the diameter switching tool 6 of the movable movable table 4 by the connecting pins 7 as described above. (See FIG. 16 (b)).

(7) Each engagement pin 904 is extracted from each insertion hole 902 of the uppermost hammer extension body 97, and the uppermost hammer extension body 97 is lifted by the suspension tool 900, and the lower hammer extension body 97 is lifted. Separate. Then, the lifted hammer extension body 97 is not raised, but is moved sideways through the opening 150 of the upper frame member 15 and lowered to a predetermined place. According to this method, it is possible to further reduce the upper space necessary for the removal work of the hammer extension body 97 using a crane (see FIG. 17A).

(8) After the extracted hammer extension body 97 is lowered to a predetermined position, the hanging tool 900 is removed from the hammer extension body 97 and returned to the original position. Then, the hanger 900 is attached to the rod 98 of the hammer extension 97 at the top of the down-the-hole hammer 9 with the engagement pin 905. Although the down-the-hole hammer 9 is coupled to the movable lift 4, the hammer extension 97 itself is in a free state in the vertical direction with respect to the drive bush 2 (downwardly downward) (FIG. 17B). reference). The hammer extension body 97 is removed step by step by repeating this operation.

After the step (8), when three or more hammer extension bodies 97 remain in the down-the-hole hammer 9, the process returns to the step (3) and the steps (3) to (8) are repeated, and the uppermost hammer The extension body 97 is sequentially extracted to shorten the down-the-hole hammer 9, and the hammer body 90 is raised.
And after the said process (8), when the hammer extension body 97 becomes two, it transfers to the following process (9).

(9) The movable movable table 4 is raised by the hydraulic cylinder 5. The engagement groove 973 of the hammer extension body 97 on the lower side (second stage from the top) of the down-the-hole hammer 9 that rises together with the elevating movable body 4 is aligned with the engagement recess hole 25 of the engagement recess 24 of the drive bush 2 to prevent the fall. The stopper 8 is inserted into the engaging recess 24. Thereby, the hammer extension body 97 is fixed to the drive bush 2 in the vertical direction. Then, the two connecting pins 7 are extracted, and the movable movable table 4 is lowered to the lowest position (see FIG. 18A).

(10) In the same manner as in the above step (7), the uppermost hammer extension body 97 is lifted and separated from the lower hammer extension body 97, and is moved laterally through the opening 150 of the upper frame member 15 as it is. Lower the place. (See FIG. 18 (b)).

(11) After the removed hammer extension body 97 is lowered to a predetermined position, the hanging tool 900 is returned to its original position and connected to the remaining hammer extension body 97. Then, until the hammer main body 90 comes out of the drilling hole 100, the telescopic leg 11 of the table base 1 is extended to raise the table base 1 of the rotary drilling machine rotary table device A (see FIG. 19A). .

(12) Again, the hammer extension body 97 of the down-the-hole hammer 9 is suspended by the suspension tool 900, and in this state, the respective pins 61 are removed from the pin through-holes 45 and 45a provided in the movable elevator 4 and the diameter is switched. The half members 60, 60a of the tool 6 are pivoted upward to open and stand vertically.
Then, the telescopic legs 11 of the table base 1 are contracted to lower the table base 1 of the rotary drilling machine rotary table device A to its original height.

Next, when the stopper 8 for preventing the fall is extracted and the hammer extension body 97 and the hammer main body 90 are lifted by the hanging tool 900, the lower end portion of the lower cylinder 22 of the drive bush 2 is the large diameter portion 906 on the side surface of the hammer main body 90 ( The engaging means is engaged with the lower cylinder portion 22 from above and is hooked to be detached from the table base 1 and lifted together with the hammer main body 90. The large-diameter flange portion 23 of the drive bush 2 passes through the central hole 432 of the large-diameter main body portion 430 which is made effective by opening the half members 60 and 60a as described above, and the hammer extension body 97 and the hammer main body. 90 and the drive bush 2 are extracted from the rotary drilling machine rotary table device A.
After the drilling operation is completed in this way, the rotary drilling machine rotary table device A is moved to the next drilling location (see FIG. 19B).

  According to the rotary drilling machine rotary table apparatus A, as explained in the above-mentioned steps, the top hammer is not lifted and pulled out with the long length of the down-the-hole hammer 9 after completion of the drilling. Since the extension body 97 is repeatedly removed and the length of the down-the-hole hammer 9 is gradually shortened, drilling work should be performed without any trouble even in a place where a large space cannot be secured around the hole (particularly the upper part). Can do.

  As described above, the driving operation of the down-the-hole hammer 9 is the same as the conventional method using the rotation of the down-the-hole hammer 9 by the drive bush 2 and the free descent due to the weight of the down-the-hole hammer 9. However, when the ground to be drilled is relatively soft, this method hinders the drilling operation.

  That is, if the down the hole hammer 9 is freely lowered by its own weight on the soft ground, the down the hole hammer 9 will go deep into the ground before the earth is fully discharged, and the soil around the hammer will not be discharged Then, the down-the-hole hammer 9 is strongly resisted by the rotation, and finally the down-the-hole hammer 9 stops.

When the ground to be drilled is relatively soft, the rotary table device A for a rotary drilling machine can be used as shown in FIG. 20 so that such a situation does not occur.
First, FIG. 20A shows a state in which a drilling operation by the down-the-hole hammer 9 has progressed, and the lower part of the hammer body 90 is in the ground. At the upper end of the down-the-hole hammer 9, a hanging tool 900 suspended by the wire of the crane is attached.

  Further, the down-the-hole hammer 9 has a connecting pin 7 inserted into the insertion hole 974 of the uppermost hammer extension body 97 and the pin through holes 63 and 63a of the half members 60 and 60a of the caliber switching tool 6, It is attached so that it can rotate on the movable movable table 4 located at the top in the range. In this operation, the fall prevention stopper 8 is not used.

  From the state of FIG. 20A, the hammer bit 93 is operated, and the down-the-hole hammer 9 is rotated by the drive bush 2 to perform drilling. Since the diameter switching tool 6 to which the down-the-hole hammer 9 is attached by the connecting pin 7 is provided on the rotating body 43, the down-the-hole hammer 9 can rotate without any trouble. In this operation, the movable lift table 4 is lowered to the lowest position in the lift range of the movable lift table 4 at a required speed by the hydraulic cylinders 5 and 5a. At this time, the down-the-hole hammer 9 is suspended by the elevating movable table 4 and lowered while being supported by the hydraulic cylinders 5 and 5a.

  By this operation, the down-the-hole hammer 9 does not go deep into the ground before the earth is sufficiently discharged, and the earth around the hammer by the rotation of the down-the-hole hammer 9 is performed without any problem. (See FIG. 20 (b))

In the state of FIG. 20B, the crane suspension 900 is removed from the uppermost hammer extension body 97, and a separately prepared hammer extension body 97 is lifted and connected to the hammer extension body 97. (See FIG. 20 (c))
Tension the wire so that the down-the-hole hammer 9 is suspended.
In this state, the coupling pin 7 is extracted, and the movable movable table 4 is raised to the height shown in FIG. Then, the connecting pin 7 is inserted, and the state shown in FIG.
20A to 20C are repeatedly performed to sequentially connect the hammer extension bodies 97, and the down-the-hole hammer 9 is extended to perform drilling.

  In the above method of use, the descent speed (descent amount) of the down-the-hole hammer 9 is limited and free descent using its own weight is not performed. Therefore, the down-the-hole hammer 9 enters deep into the ground before the soil is sufficiently discharged. There is no end. Accordingly, it is possible to prevent the down-the-hole hammer 9 from stopping due to the fact that the soil around the hammer is stagnated without being discharged and is compressed and becomes a strong resistance to the rotation of the down-the-hole hammer 9.

  With reference to FIGS. 21 to 24, another drilling device B2 in which a rotary table device A for a rotary drilling machine and a down-the-hole hammer 9a having a structure different from the down-the-hole hammer 9 will be described. This drilling device B2 is used in the case of soil that cannot be sufficiently discharged by air pressure alone, for example, clay-like ground, or ground where the air does not rise and falls into the layer like a gravel layer. The

  The down-the-hole hammer 9a shown in FIG. 21 is provided with a hammer main body 90a having a screw 921 provided on the outer peripheral surface of an air tank portion 92a and a required number of hammer extensions 97a similarly having a screw 975.

The air tank portion 92a of the down-the-hole hammer 9a is formed to be slightly smaller in diameter than the air tank portion 92, and the screw 921 is wound around the entire length on the outer peripheral surface. The outer edge portion of the screw 921 is formed to be slightly smaller in diameter than the inner peripheral surface of the drive bush 2a described later. Further, on the outer edge portion of the screw 921, engagement recesses 922 are provided at four positions at equal intervals in the circumferential direction and in parallel with the axial direction so as to form a total of four rows.
Each row of the engagement recesses 922 is engaged with an engagement protrusion 27 of the drive bush 2a described later.

The hammer extension body 97a of the down-the-hole hammer 9a includes a main body portion 970 having a slightly larger diameter than the rods 96 and 98, and a screw 975 is wound around the outer peripheral portion of the main body portion 970. The diameter of the screw 975 is the same as the diameter of the screw 921.
The pitch of the screw 975 is formed to be the same as that of the screw 921, and the end portion on the joining side of both screws is provided so as to be close to each other with a slight gap and to be substantially continuous. This also applies to the joint portion between the hammer extension members 97a.

On the outer edge portion of the screw 975, engagement recesses 976 are provided at four positions at equal intervals in the circumferential direction and parallel to the axial direction so as to form a total of four rows. Engaging protrusions 27 of a drive bush 2a, which will be described later, are engaged with the engaging recesses 976.
The rod 96 of the air tank 92a and the hammer extension 97a and the rod 98 of the hammer extension 97a and the hammer extension 97a are joined together by the rod 98 of the hammer extension 97 and the crane suspension 900. It is almost the same as the structure, and is performed using the engagement pin 907.

  The rotary drilling machine rotary table device A uses a drive bush 2a having a structure different from that of the drive bushing 2 and the other parts are the same as the rotary drilling machine rotary table device A. It is.

  Engagement ridges 27 parallel to the axial direction are provided at four locations at equal intervals in the circumferential direction instead of the engagement longitudinal grooves 26 as in the drive bush 2 on the inner peripheral portion of the drive bush 2a. As described above, the engagement protrusions 27 engage with the four rows of engagement recesses 922 of the screws 921 and the four rows of engagement recesses 976 of the screws 975, respectively. The number of engaging ridges 27 is not limited to four, but is appropriately set according to the number of engaging concave portions 922 and 976 provided in the down-the-hole hammer to be used. The structure of the drive bush 2a other than the engaging ridges 27 is the same as that of the drive bush 2.

  Further, since the air tank portion 92a and the hammer extension body 97a of the down-the-hole hammer 9a have different structures from the air tank portion 92 and the hammer extension body 97 of the down-the-hole hammer 9, the diameter of the movable movable table 4 can be switched by the connecting pin 7. The attachment to the tool 6 and the engagement to the drive bush 2a by the stopper 8 are performed by a method (structure) different from them.

  That is, attachment (in this case, by mounting) of the air tank portion 92a and the hammer extension body 97a to the aperture switching tool 6 by the connecting pin 7 is performed by inserting the connecting pin 7 between a pair of pin through holes 63, 63a on one side. This is performed by receiving the lower side of one of the screws 921 and 975 (see FIGS. 21 and 24). The connecting pin 7 functions as a single pin, and the connecting pin 7 cannot be inserted into the other pair of pin through holes 63 and 63a.

  Further, the engagement of the air tank portion 92a and the hammer extension body 97a to the drive bush 2a by the stopper 8 is performed by receiving the lower side of one of the screws 921 and 975 by the stopper 8 as in the case of the coupling pin 7. Also in this case, the screws 921 and 975 are received by the insertion portion on one side (left side in FIG. 21) of the insertion portions 81 and 82 of the stopper 8.

(Function)
The use method and operation of the rotary table device A for a rotary drilling machine with the drive bush 2a using the down-the-hole hammer 9a are as follows. Except for the method of attachment and engagement with the drive bush 2a by the stopper 8, this is substantially the same as the case where the down-the-hole hammer 9 is used, and the description thereof will be omitted.

  Note that the terms and expressions used in this specification are merely explanatory and are not limiting at all, and terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to exclude. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

B1 Drilling device A Rotary table device for rotary drilling machine 1 Table base 10 Base part 11 Telescopic leg 12 Case 13 Step 14 Inner guide pillar 15 Upper frame member 150 Opening part 151 Through hole 2 Drive bush 20 Insertion part 21 Upper part Tube 22 Lower tube 23 Flange portion 24 Engagement recess 25 Engagement recess hole 250 Hole 26 Engagement longitudinal groove 3 Rotating drive device 30 Casing 301 Mounting hole 31 Hydraulic motor 32 Rotating receiver 321 Fitting portion 322 Flange portion 323 Step portion 324 Engagement projection 33 Gear device 400 Elevating device 4 Elevating movable table 40 Base portion 41 Outer guide cylinder 42 Through hole 43 Rotating body 430 Main body portion 431 Flange portion 432 Central hole 44, 44a Bearing 45, 45a Pin passage receiving device 450 Pin passage hole 46 Step 5, 5a Hydraulic cylinder 6 Diameter switching tool 6 , 60a Half member 601 Hole forming part 602 Matching part 603 Projecting piece 604 Pin 605 Pin hole 61 Pin 62 Through hole 63, 63a Pin through hole 7 Connecting pin 8 Fall prevention stopper 80 Bending part 81, 82 Insertion part 83 Handle 9 Down-the-hole hammer 90 Hammer body 906 Large diameter part 91 Mechanism part 92 Air tank part 920 Engagement line 93 Hammer bit 94 Groove for earth removal 95 Reinforcement member 96 Rod 97 Hammer extension body 971 Main body part 972 Engagement line 973 Engagement groove 974 Difference Insertion hole 98 Rod 99 Insertion hole 901 Engagement groove 902 Insertion hole 903 Groove part 904 Engagement pin 905 Engagement pin 907 Engagement pin 900 Suspension tool 100 Drilling hole 19 Base part B2 Drilling device 2a Drive bush 27 Engagement convex 9a Down the hole hammer 90a Hammer body 92a Air heater Click portion 921 screw 922 engaging recesses 97a hammer extension body 970 main body portion 975 screws 976 engaging recess

Claims (9)

A rotary table for a rotary drilling machine that drills the ground while rotating a drilling machine passed through a drive bush (2) with the drive bush (2),
A table base (1) having a drive bush (2) for rotating the drilling machine and a drive means (31, 32) for driving the drive bush (2);
An elevating device (400) that is provided on the table base (1) and raises and / or lowers the hole drilling machine;
A fall prevention means (8) for stopping the drilling machine and preventing it from dropping when the drilling machine is lifted by the lifting device (400) to remove the extension body at the upper part of the drilling machine;
Including
The elevating device (400) includes an elevating movable table (4) and elevating drive means (5, 5a) for elevating the elevating movable table (4).
The elevating movable base (4) has a rotating body (43) having a hole (432) through which a drilling machine is passed,
The rotating body (43) is accompanied by the rotation of the drilling machine while the drilling machine is fixed by the fixing means (6, 7) that can fix and release the drilling machine passed through the hole (432). Rotate,
Rotary table for rotary drilling machines. A table base (1) mounted directly or indirectly on the work surface;
An elevating movable base (4) provided to move up and down with respect to the table base (1);
Elevating drive means (5) for driving the elevating movable table (4),
A drive bush (2) provided on the table base (1) for rotating an extension of the drilling machine in the axial circumferential direction;
Rotational drive means (3) for driving the drive bush (2);
A rotating body (43) having means (6, 7) for attaching and removing the extension body of the hole drilling machine to and from the movable movable table (4), and capable of rotating with the hole drilling machine attached,
Fall prevention means (8) capable of engaging and disengaging the extension body of the drilling machine with respect to the table base (1) or the drive bush (2);
With
Rotary table device for rotary drilling machines. A diameter switching means (6) that allows the extension body to pass through the movable table (4) when the diameter is small, and the drive bush (2) that is attached to the drilling machine to be removed when the diameter is large. Is provided,
The drive bush (2) is detachably attached to the table base (1), and includes an engagement means (22) that engages with the hole drilling machine from above to be integrated.
The rotary table device for a rotary drilling machine according to claim 2. When the diameter is small, the extension body can be passed through, and when the diameter is large, the diameter switching means (6) through which the drive bush (2) attached to the drilling machine can be passed is a pair of half members ( 60, 60a), and a small diameter opening (62) formed by combining each half member (60, 60a), and each half member (60 , 60a) is a structure that switches between the large diameter opening (432) that becomes effective by separating,
The rotary table device for a rotary drilling machine according to claim 3. Means capable of attaching and removing the extension of the hole drilling machine to the movable movable table (4) include a through hole (605) provided in the half member (60, 60a), and a drilling machine A coupling pin (7) that can be inserted through the through hole provided in the extension body in parallel with the diameter line direction and through the through hole (605) provided in the half member (60, 60a). And consists of,
The rotary table device for a rotary drilling machine according to claim 4. A drop prevention means capable of engaging and disengaging the extension body of the hole drilling machine with respect to the drive bush (2) is provided in the drive bush (2), and the engagement recess penetrates to the inner peripheral surface thereof. (24) and an engaging groove (24) provided in the drive bush (2) in the engaging groove provided in the direction intersecting the axial direction on the outer peripheral portion of the extended body of the hole drilling machine. A fall prevention stopper (8) that can be engaged in a state,
A rotary table device for a rotary drilling machine according to any one of claims 2 to 5. A rotary table device for a rotary drilling machine (A) according to any one of claims 1 to 6,
A drilling machine (9),
Drilling device. It is a method of extracting the drilling machine (9) from the drilling hole after drilling the ground while rotating the drilling machine with a rotary table,
A step of lifting the drilling machine (9) in the drilling hole with a lifting device (400) provided in the rotary table device,
Stopping the hole drilling machine (9) so as not to fall to the hole bottom, and in this state, releasing the holding of the hole drilling machine (9) by the lifting device (400),
Removing the extension (97) at the top of the drilling machine (9);
A step of lowering the lifting device (400) and holding the drilling machine (9),
By sequentially repeating the above steps, the entire drilling machine (9) is gradually removed while removing the extension body (97) of the drilling machine (9) one by one from the upper extension body.
How to remove a drilling machine. A method of extracting a drilling machine (9) connecting an extension body (97) from a drilling hole after drilling the ground,
Using the lifting device (400) provided in the rotary table device, the drilling machine (9) is pulled up to the position where the uppermost extension can be removed,
Including removing the uppermost extension (97) after preventing the dropped drilling machine (9) from falling so as not to fall,
By sequentially repeating the above procedure, the entire drilling machine (9) is gradually removed while removing the extension body (97) of the drilling machine (9) one by one from the upper extension body.
How to remove a drilling machine.

Images