JPH10244530A - Wet rotary drilling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten an installing arrangement and operating time of a machine and to reduce a cost, size and weight by injecting to supply coolant sealed in an aerosol can in a liquefied state obtained by mixing liquid as a base material with organic solvent having a low boiling point from a drill pit at an end of a drill head, and perforating a predetermined hole at a wall surface. SOLUTION: Coolant 122 is liquid obtained by mixing water as base material with adjuvant such as soluble liquefied gas such as organic solvent having a low boiling point such as methanol and/or dimethylether. The wet rotary drilling machine 1 supplies the coolant 122 from a coolant supply unit for charging a plurality of aerosol cans each sealing the coolant 122 to a drill body via a hose. A perforating operation of a repairing hole 121 is conducted by injecting to supply the coolant 122 to a part to be perforated of a wall surface 120, externally discharging cutting chips generated in the hole 121 by injection pressure, and simultaneously efficiently cooling a drill bit 11 at an end of a drill head 10 with vaporization heat of the liquid and the solvent. As a result, its operation can be simply handled with small size and weight and the operating efficiency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet rotary drilling apparatus suitable for drilling repair holes or the like in a wall or ceiling of a building while supplying a liquefied coolant from the tip of a drill pit. About.

[0002]

2. Description of the Related Art For example, in concrete buildings, cracks and tiles peeling off on walls and ceilings, etc.
Alternatively, when performing repair such as lifting of the exterior wall, a repair hole is drilled in these locations, and the repair hole is filled with an adhesive or hammered with an anchor pin. Further, in a concrete building, in order to maintain a good condition of a wall surface, a ceiling and the like for a long period of time, a waterproof treatment thereof is indispensable. In particular, cracks generated on the wall surface or the like allow rainwater or the like to enter the interior and erosion the concrete. In addition, this rainwater freezes inside in winter,
In the worst case, even the internal steel frame and rebar are corroded and destroyed by repeatedly melting and expanding the crack.

[0003] The above-mentioned repair hole is generally drilled at a predetermined location such as a wall surface or a ceiling using a vibration drill device or a rotary drill device. The vibration drill device has a feature that the drilling operation of the repair hole can be easily performed by making the cooling medium of the drill unnecessary. However, this vibration drill device generates a large noise due to the vibration of the drill at the time of drilling work, such as an apartment, a hotel,
There was a problem in using it for repair work in hospitals and the like. Also,
When the vibration drill device is used in a state where the drilling position or the hole diameter is wrong, a problem arises that a crack to be repaired is meaninglessly expanded.

In recent years, seismic works have been actively performed on existing buildings and the like. In this seismic work, a large number of anchor bolts are driven into a wall or the like, and the anchor bolts are used. For this purpose, a wall material for reinforcement and the like are assembled. Also in this earthquake-resistant construction, a hole for driving an anchor bolt is drilled in a wall surface or the like by a drill device. In general, this earthquake-resistant construction is often performed in a work place where the office in operation is surrounded by a simple dust-proof sheet, and measures such as noise and dust protection during the construction are extremely important.

[0005] For this reason, recently, for the above-mentioned repair work and the like, a rotary drill device equipped with a diamond pit is generally used. In this rotary drill device,
In order to improve work efficiency or reduce noise, drilling work is performed by supplying a cooling medium such as cooling water or air to the drilled portion from the tip of the drill pit. Cooling water is generally sprayed out of the drill pit using compressed air to efficiently cool the drill pit and remove dust generated from the drilled repair holes.

[0006] By the way, in such a rotary drilling device, each supply source is required to supply cooling water and compressed air to the drill pit. Therefore, this rotary drilling device requires various facilities such as a compressor for supplying compressed air, a water tank storing cooling water, or a hose connecting these components during drilling work. These facilities have a total weight of about 40K.
g, there is a problem that the handling is extremely inconvenient.

For this reason, the conventional drilling operation requires a setup operation in which a compressor and a water tank are installed in the most efficient place, and then a hose is pulled from the compressor and the water tank to a rotary drill device. The work area was restricted by the compressor and the water tank, which were large in weight and external shape, which sometimes hindered repair work.

In addition, the rotary drill connected to the hose has a problem that the workability at high places is poor because the weight becomes heavy and the drawing operation is troublesome. Furthermore, the conventional rotary drill device is not suitable for performing a relatively simple operation because the above-described complicated setup operation and the like are required.

Further, since the above-mentioned compressors and the like are extremely expensive, it is difficult to have a large number of such compressors. For this reason, the repair work has a problem that it takes a lot of construction days and the construction cost becomes enormous. Furthermore, in the conventional rotary drilling device, for example, in the case of waterproofing work, when filling a drilled repair hole with a waterproofing agent, it takes time for the cooling water remaining inside the repair hole to dry. There was a problem that it became long. In addition, the conventional rotary drilling device has a problem that it is difficult to use it when drilling a repair hole in a ceiling or the like because a large amount of cooling water is used.

[0010]

SUMMARY OF THE INVENTION The applicant has previously solved a problem of the above-mentioned conventional rotary drilling device by using Japanese Patent Application No. 8-136654 "rotary drilling device and attachment device for rotary drilling device". Wet rotary drilling equipment was provided. As shown in FIG. 13, the wet rotary drill device 100 includes a driving unit 101 and a drill body 10.
2 and a coolant supply unit 103. The wet rotary drilling apparatus 100 uses a liquid such as water as a cooling medium, mixed with a low-boiling organic solvent, and uses a coolant sealed in an aerosol can 104 of a cooling unit 103 in a liquefied state. The wet rotary drilling apparatus 100 is configured to supply a coolant supplied from the coolant supply unit 103 to the drill body 102 via the hose 103a from the tip of the drill pit 105 to a perforated portion such as a wall surface while repairing holes or the like. Perforate.

The drive unit 101 is constructed in the same manner as a commercially available rotary drill device, and a drive motor (not shown) is built in the housing 106 and a chucking mechanism is provided on a rotary shaft thereof. By operating the power switch 107, power is supplied to the drive motor of the drill body 102, and the rotary shaft is driven. The chucking mechanism is constituted by a plurality of chucking levers provided at the tip of the rotating shaft, as is well known. The chucking mechanism operates the chucking lever so that the chucking levers converge and expand, and the drill body 102
Is attached to and detached from the rotating shaft.

Although not shown in detail, the drill body 102 includes a housing 106, a rotating shaft member 108 rotatably housed inside the housing 106 by a bearing (not shown), and an axial direction with respect to the rotating shaft member 108. The drill pit 105 is slidably and integrally rotated, and a drill pit 105 is exchangeably mounted at a distal end thereof. Drill body 1
02, the drill guide mechanism 110 and the drill head 1
09 is provided with a dust scattering prevention mechanism 111 and the like provided at the tip of the camera. The dust scattering prevention mechanism 111 includes a dust cover member 112 that is in close contact with a perforated portion such as a wall surface, and a dust storage container 113 that stores gelled dust generated from the perforated portion.
And are provided.

Although not described in detail, the drill body 102 has a bearing mechanism for connecting the rotary shaft member 108 and the drill head 109 so as to be coaxial with each other and to rotate integrally therewith, and this bearing. An oil seal mechanism or an automatic valve mechanism for keeping the mechanism liquid-tight is provided.
The coolant supplied from the coolant supply unit 103 is supplied to the drill pit 105 by the rotation shaft member 108 and the drill head 109.
The coolant passage leading to the front end portion is formed. The coolant flow path is controlled to open and close by an automatic valve mechanism that operates when the drill pit 105 is pressed against a wall or the like during the drilling operation. The drill body 102 includes a drill pit 105
Is pressed against the wall surface and the drill head 109 slides, whereby the automatic valve mechanism is operated via the drill head 109 to open the coolant flow path. Accordingly, in the drill body 102, the coolant supplied from the coolant supply unit 103 to the rotating shaft member 108 of the drill body 102 is injected into the bore from the tip of the drill pit 105 via the drill head 109. .

In the wet rotary drilling apparatus 100, when drilling a hole such as a repair hole in a wall surface, an operator grips a hand-held part 114 provided on the drive unit 101 and a handle member 115 provided on the housing 106. In this way, the wet rotary drill device 100 allows the drill pit 105 to stably abut against the drilling position so that the drilling operation is performed.

According to the wet rotary drilling apparatus 100 configured as described above, a tank for storing cooling water, a hose, or a compressor for supplying compressed air is not required. It is characterized in that the setup time can be shortened, and that the work time is greatly reduced by simple work and quick drying in the perforations. In addition, the wet rotary drill device 100 has features that it is extremely inexpensive, small, lightweight, and extremely easy to handle. In addition, the wet rotary drilling device 100 also requires a small amount of coolant to be supplied into the perforation, and is easy to treat the gel dust in which the coolant and the shavings are mixed, and does not pollute the workplace. It is suitable for indoor work.

Incidentally, the wet rotary drilling apparatus 100 comprises:
Although having the above-mentioned features, it was found that the following problems were encountered when actually used on site. That is, the wet rotary drilling device 100 includes the dust cover member 11.
Since the drill head 109 penetrates through the bottom part of 2,
The gel-like dust generated from the perforated portion and flowing into the inside of the dust cover member 112 may slightly leak from the shaft hole. The gel dust may fall from the dust cover member 112 and stain the floor or the like.

The wet rotary drilling apparatus 100 is provided with an elastically deformable attachment member at the opening at the distal end of the dust cover member 112 in order to improve the adhesion to a wall or the like. This attachment member is deteriorated due to the attachment of gel-like dust and the like over a long period of use, resulting in poor adhesion to a wall surface or the like. The gel dust may leak from a gap generated between the attachment member and the wall surface or the like, and contaminate the floor surface or the like.

Furthermore, in the wet rotary drilling apparatus 100, the drill head 109 is replaced when drilling a repair hole or the like having a different hole diameter or due to wear due to long-term use. In the wet rotary drill device 100, since the dust scattering prevention mechanism 111 is additionally provided so as to cover the periphery of the tip portion, there is a problem that the operation of attaching and detaching the drill head 109 is troublesome. In addition, when replacing the drill head 109, the wet rotary drill device 100 requires an operation of holding the free rotating shaft member 108 in a locked state and removing the drill head 109. This operation is performed by, for example, holding down the rotary shaft member 108 side with a spanner or the like and turning the drill head 109 using another spanner in a state where the wet rotary drill device 100 having a relatively heavy weight is laid on its side. . Therefore, the wet rotary drill device 100 has a problem that the operation of replacing the drill head 109 is troublesome.

Meanwhile, the wet rotary drill device 100 is
The drilling is performed while holding the hand-held portion 114 and the handle member 115 and spraying and supplying the coolant from the tip of the drill pit 105 to the drilling portion. The drill pit 105 has a cylindrical shape having a nozzle hole for injecting a coolant, and has a flat tip surface. For this reason, in the wet rotary drilling apparatus 100, the whole is gradually brought into a vertical state while the center is cut out by drilling the wall portion or the like by the outer peripheral edge of the drill pit 105 by applying the outer surface of the drill pit 105 to the wall surface or the like in the first inclined state. Drilling was performed while doing so. However, this method also has a problem that when the drill pit 105 having a large outer diameter is used to drill a repair hole or the like having a large inner diameter, the drill pit 105 slides on the wall surface, so that centering is not performed well. is there.

Therefore, the present invention is to provide a wet rotary drill device which solves various problems arising from use in the field and further improves the usability in the above-mentioned prior application wet rotary drill device. Aim.

[0021]

In order to achieve the above object, a wet rotary drill according to the present invention comprises a liquefied coolant containing a liquid as a base material mixed with a low-boiling organic solvent in an aerosol can. The coolant is injected and supplied from a drill pit provided at the tip of the drill head to form a predetermined hole in a wall surface or the like. The wet rotary drilling device has a base member that is supported by a drill guide mechanism and is moved in accordance with the drilling operation of the drill pit, and a drill pit is exposed to the inside through a guide hole provided in a bottom portion. A dust outlet cover is provided on the outer peripheral wall, and is generally cup-shaped to be assembled to the base member via a positioning means. The dust-proof cover member is attached to the back surface of the bottom surface of the dust-proof cover member so as to surround the guide hole. A ring-shaped elastic sealing member that seals the dust and a dust that is generated from a perforated portion such as a wall surface by a drilling operation of a drill pit, flows into a dustproof cover member, and stores gelled dust that flows out through a dust outlet. And a storage container.

In the wet rotary drilling apparatus according to the present invention having the above-described configuration, the drill head to be replaced when drilling a repair hole or the like having a different inner diameter is provided.
The hermeticity of the dust scattering prevention mechanism is maintained by replacing only the seal member having an inner diameter that matches the outer diameter of the drill head without replacing the dust protection cover member and the like that constitute the dust scattering prevention mechanism. Therefore, the wet rotary drill device can be easily handled and can perform drilling operations such as various repair holes.

In addition, the wet rotary drill device according to the present invention is rotatably mounted in the housing, and has one end connected to the driving portion and the other end screwed to the bit supporting member constituting the drill head. By rotating the drill head and supplying the coolant from the coolant supply space provided inside, the rotary shaft member can be relatively engaged with the engaging portion provided on the housing and formed on the rotary shaft member. And a rotation shaft lock mechanism having a lock lever normally held at a position disengaged from the engagement portion. In the wet rotary drill device, the rotary shaft member is locked by operating the rotary shaft lock mechanism to relatively engage the lock lever with the engaging portion. The operation of locking the member side is not required, and only the drill head side can be rotated by sandwiching it with a wrench or the like, so that the attachment / detachment operation can be performed, thereby greatly improving workability.

Further, the wet rotary drill device according to the present invention has a substantially cup-shaped dust-proof cover member that covers the outer peripheral portion of the drill pit, and scatters gel-like dust and the like generated from the perforated portion along with the perforating operation. A dust scatter prevention mechanism for preventing dust, and a dust proof cover member provided between the base member supporting the dust proof cover member and the housing of the drill main body with the drilling operation to impart close contact behavior to the pierced portion. A drill guide mechanism that supports the dust scattering prevention mechanism so as to perform a sliding operation. This drill guide mechanism has
A dust-proof cover member for covering a sliding operation portion is provided.

According to the wet rotary drilling device constructed as described above, dust and the like generated from the drilled portion are prevented from adhering to the slide portion of the drill guide mechanism, so that the device can be used for a long period of time. , A smooth operation is maintained. Since the dust-proof cover member can be configured to be simple and small, the operability is improved without increasing the size of the device.

Furthermore, the wet rotary drilling device according to the present invention has a substantially cup-shaped dust-proof cover member that covers the outer peripheral portion of the drill pit, and is capable of removing gel-like dust and the like generated from the perforated portion during the perforating operation. A dust scatter prevention mechanism for preventing scatter and a dust proof cover member provided between a base member for supporting the dust proof cover member and the housing of the drill main body, and the dust proof cover member imparts close contact behavior to the pierced portion with the piercing operation. And a drill guide mechanism for supporting the dust scattering prevention mechanism so as to slide. This drill guide mechanism is configured so that the dust lock cover member of the dust scattering prevention mechanism is locked and held by the guide lock mechanism at a position where the drill pit is exposed to the outside.

According to the wet rotary drilling device constructed as described above, the dust scattering prevention mechanism attached to the tip does not hinder the replacement of the drill head. Therefore, in the wet rotary drill device, the exchange of the drill head and the drill pit or the cleaning thereof are extremely easily performed, and the workability is greatly improved.

Further, the wet rotary drill device according to the present invention comprises: a base member for supporting a dustproof cover member of a dust scattering prevention mechanism; a guide shaft member for supporting the base member slidably in the axial direction; A drill guide mechanism having an elastic member that urges the base member to provide the dustproof cover member with close contact with the perforated portion, and a cam means that sets the guide shaft member in a slidable state and a locked state. Is provided. In addition, the wet rotary drill device includes a drill positioning mechanism provided at a target position around the drill pit with respect to the base member of the drill guide mechanism and having at least a pair of positioning pins slidable in the axial direction.

According to the wet rotary drilling device constructed as described above, the drill pit is positioned by hitting the tip of the positioning pin against the drilling surface while the guide shaft member of the drill guide mechanism is locked. Will be
Therefore, the wet rotary drilling device eliminates the need for a troublesome operation of tilting the drill pit and twisting the perforated portion at the outer peripheral edge to perform centering, and enables accurate drilling even when a large-diameter drill pit is used. It can be carried out.

[0030]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The wet rotary drill device 1 has a basic configuration similar to that of the above-mentioned prior application wet rotary drill device 100, and as shown in FIG. 1 and FIG. And a coolant supply unit (not shown). Wet rotary drill 1
Is a mixture of water and a base material such as methanol, ethanol or various ester materials, a low boiling organic solvent such as dimethyl ether, and / or a liquefied liquefied gas such as dimethyl ether. Used.

The wet rotary drill device 1 includes the coolant 12
A plurality of aerosol cans enclosing 2 and a container loaded with these aerosol cans constitute a coolant supply unit, and coolant 122 is supplied from the coolant supply unit to the drill body 5 via a hose or the like. Is done. The coolant supply section is
Since it is hung on, for example, a worker's waist or the like using a harness or the like provided in the container, it is not necessary to route a hose or the like, and the workability is improved.

The wet rotary drill device 1 drills a repair hole 121 while spraying and supplying a coolant 122 to a drilled portion of a wall 120 as shown in FIG. 1, for example. Coolant 122
Discharges cutting powder and the like generated by the injection pressure from the repair hole 121 to the outside, and also causes the drill pit 11 attached to the distal end portion of the drill head 10 to be described later by the heat of vaporization of the liquid and the organic solvent having a low boiling point. Cool efficiently. The cutting powder and the like are mixed with the coolant 122 and discharged as gel dust 123 in a gel state.

The drive unit 2 is configured in the same manner as a commercially available rotary drill device, and has a hand-held portion on one side of the housing and a power switch disposed on the hand-held portion. Further, the drive unit 2 includes a drive motor and a rotating shaft 3 (not shown) and a well-known chucking mechanism 4 and the like inside the housing. Although the details of the chucking mechanism 4 are omitted,
A plurality of chucking levers provided at the end of the rotating shaft 3 are provided, and these chucking levers are converged and expanded using a dedicated chucking wrench. In the wet rotary drill device 1, a rotary shaft member 7 of a drill body 5 described later is thereby attached to and detached from the drive unit 2.

As shown in FIGS. 1 to 4, the drill body 5 includes a housing 6, a rotary shaft member 7, a sleeve member 8, a slide shaft member 9, and a drill pit 11 at the tip.
And a coolant check valve member 12 equipped with a drill head. Further, the drill body 5 is provided with a dust scattering prevention mechanism 13 attached to the tip of the drill head 10 and a drill guide mechanism 14 that supports the dust scattering prevention mechanism 13 so as to be slidable in the axial direction. ing. Further, the drill body 10 includes a drill head 10.
A rotary shaft lock mechanism 15 for locking the rotary shaft member 7 when exchanging the drill pit 11 and the like, and a guide lock mechanism 16 for locking the drill guide mechanism 14 are provided. The dust scattering prevention mechanism 13 is provided with a pit positioning mechanism 17 for positioning the drill pit 11 at a position where the repair hole 121 is drilled at the time of drilling.

The housing 6 is formed by, for example, aluminum die casting in order to reduce the weight and have sufficient mechanical rigidity, and as shown in FIGS. 4 to 6, a connecting bracket having one end fixed to the outer peripheral portion thereof. It is firmly connected to the drive unit 2 via the member 18. Housing 6
As shown in detail in FIG. 6, the whole has a substantially cylindrical shape by being provided with shaft holes 19 which are respectively opened on both side surfaces. The shaft hole 19 has a stepped shape in which the base end side is a small-diameter small-diameter shaft hole portion 19a and the distal end side is a large-diameter enlarged-diameter shaft hole portion 19c via a slightly large-diameter intermediate shaft hole portion 19b. It is configured as a shaft hole.

The housing 6 is provided with a coolant supply passage 20 communicating with the small-diameter shaft hole portion 19a, and the coolant supplied from the coolant supply portion is supplied to the coolant supply passage 2 through the coolant supply passage 2.
A connecting pipe member 21 for supplying the small diameter shaft hole 19a into the small-diameter shaft hole portion 19a through a closed structure is assembled. As shown in FIGS. 4 to 6, the connecting pipe member 21 is provided with a small-diameter nozzle hole 21 a communicating with the coolant supply passage 20 and removes impurities and the like mixed in the coolant 122. The filter 21b is mounted. The wet-type rotary drill device 1 includes a coolant supply passage 2 through a nozzle hole 21a.
Since the coolant 122 is injected and supplied into the inside of the bearing 0, each part of the bearing whose temperature rises due to frictional heat accompanying rotation of the rotating shaft member 7 is cooled.

As will be described later, the housing 6 is provided with a handle member 22 which is gripped together with a hand-held portion on the drive unit side when the wall 120 is pierced.
The handle member 22 also serves as a storage section for a dedicated tool 81 attached to the wet rotary drill device 1 as described later.

The rotary shaft member 7 includes a small diameter shaft portion 7a having substantially the same diameter as the small diameter shaft hole portion 19a of the housing 6, and an intermediate shaft hole portion 19a.
b is formed as a stepped shaft body composed of an intermediate shaft portion 7b having substantially the same diameter as that of b and an enlarged shaft portion 19c having substantially the same diameter as the enlarged diameter shaft hole 19c. The rotary shaft member 7 has a small-diameter shaft portion 7 inside thereof.
a with the intermediate shaft portion 7b and the enlarged diameter shaft hole portion 19 as a base end.
A bottomed shaft hole 23 is formed in the front end side surface so as to communicate with c. The bottomed shaft hole 23 has a small diameter at a portion corresponding to the small diameter shaft portion 7a to form a coolant supply space portion 23a as described later, and has a large diameter at a front end side from a portion corresponding to the intermediate shaft portion 7b. Thus, a fitting shaft hole 23b into which the base end of the sleeve member 8 is fitted is formed.

The rotary shaft member 7 is provided with a coolant supply port 7d communicating with the coolant supply space 23a at the outer periphery of the small diameter shaft portion 7a. The coolant supply port 7d communicates with a coolant supply passage 20 provided in the housing 6, and guides the coolant 122 supplied through the connecting pipe member 21 into the coolant supply space 23a.

As shown in FIG. 6, the rotating shaft member 7 has a pair of bearings 24, 2 in a shaft hole 23 of the housing 6.
5 rotatably supported. The first bearing 24 is disposed on the inner wall of the small-diameter shaft hole 19 a of the housing 6 and rotatably supports the small-diameter shaft 7 a of the rotary shaft member 7. The second bearing 25 is disposed on the inner wall of the intermediate shaft hole 19 b of the housing 6 and rotatably supports the intermediate shaft 7 b of the rotary shaft member 7. Therefore, the first bearing 24 is smaller than the second bearing 25.

The wet rotary drill device 1 rotatably supports the rotary shaft member 7 by the first bearing bearing 24 and the second bearing bearing 25 separated in the axial direction as described above. 7 is rotated in a stable state. In addition, the wet rotary drill device 1 is configured such that the first bearing 24 and the second bearing 25 are connected to the small-diameter shaft portion 7a and the intermediate shaft portion 7b of the rotary shaft member 7.
Therefore, the shaft length of the small-diameter shaft portion 7a, in other words, the shaft length of the rotary shaft member 7 is reduced as compared with the above-mentioned prior application wet rotary drill device 100, and the entire device is constructed. It is miniaturized and configured.

A first bearing 24 is provided in the rotary shaft member 7 with respect to a coolant supply space 23a formed therein.
The coolant supply passage 20 provided in the housing 6 and located between the first bearing 25 and the second bearing 25 communicates with each other. The wet rotary drill device 1 is provided with a pair of oil seals 26, 26 on the inner wall of the small-diameter shaft portion 7a of the housing 6 with the communicating portion of the coolant supply channel 20 of the rotary shaft member 7 interposed therebetween, thereby providing cooling. The agent supply space 23a is configured as a liquid-tight space. In the coolant supply space 23a,
The coolant check valve member 12 and the coil spring 27 are incorporated.

As shown in FIG. 6, the coolant backflow prevention valve member 12 has a slightly smaller diameter as a whole with respect to the coolant supply space 23a and a smaller diameter at the tip end 12a to form a valve portion. Make up. As will be described later, the coolant check valve member 12 has a valve portion 12a formed with a fitting shaft hole portion 23.
B is fitted into a coolant outlet 28 formed on the bottom surface 8a of the sleeve member 8 slidably combined with the coolant outlet b, and the coolant outlet 28 is opened and closed. The coil spring 34 is incorporated in the coolant supply space 23a in a slightly compressed state, and urges the coolant backflow prevention valve member 12 in a direction in which the coolant outlet 28 is closed by the valve portion 12a. .

The sleeve member 8 has a slide shaft hole 29 into which the slide shaft member 9 is incorporated as shown in FIG. Also, the sleeve member 8
Is formed so as to present an overall bottomed cylindrical body by closing the base end side of the slide shaft hole 29 with the bottom surface portion 8a described above. The coolant outlet 28 described above is formed in the sleeve member 8 at the center position of the bottom surface portion 8a. The sleeve member 8 has an outer diameter on the base side where the bottom surface portion 8a is provided substantially equal to an inner diameter of the fitting shaft hole 23b of the rotary shaft member 7, and a mounting flange portion 8b is integrally formed on the outer periphery around the circumference. It is projected. The mounting flange portion 8b is provided at a position substantially equal to the axial length of the enlarged diameter shaft portion 7c of the rotary shaft member 7 from the base end portion and protrudes to have substantially the same diameter as the enlarged diameter shaft portion 7c.

The sleeve member 8 is fitted to the rotary shaft member 7 such that the base portion of the sleeve member 8 abuts the bottom surface portion 8a against the bottom surface of the hole in the fitting shaft hole portion 23b. It is combined with the side surface of the enlarged diameter shaft portion 7c. The sleeve member 8 is rotated by connecting the mounting flange portion 8b and the enlarged-diameter shaft portion 7c, which are abutted to each other, with connection bolts 30 screwed into mounting holes provided at a plurality of locations. It is integrated with the shaft member 7. When the sleeve member 8 is integrated with the rotary shaft member 7, the distal end thereof is
Are slightly projected from the opening of the enlarged diameter shaft hole 19c.

As shown in FIG. 6, the sleeve member 8 has a parallel keyway 29a formed on the inner wall of the slide shaft hole 29. The sleeve member 8 includes the slide shaft hole 2.
The slide shaft member 9 is mounted on the shaft 9. The slide shaft member 9 is configured as a shaft body whose outer diameter is substantially equal to the inner diameter of the slide shaft hole 29 and whose entire length is slightly larger than the entire length of the sleeve member 8. In the slide shaft member 9, a coolant channel 31 opened at both ends is formed inside the entire length thereof. In addition, the slide shaft member 9 includes
An outer peripheral screw 9a composed of a reverse screw is formed on the outer periphery of the distal end portion, and a nozzle mounting portion 9b is formed by increasing the diameter of the distal end of the coolant channel 31.

The slide shaft member 9 is connected to the slide shaft hole 2 via the parallel key 32 fitted in the parallel key groove 29a.
9. The parallel key 32 is configured such that its width is substantially equal to the width of the parallel key groove 29a and its length is smaller than the length of the parallel key groove 29a. Accordingly, the slide shaft member 9 is integrated with the sleeve member 8 via the parallel key 32 in the rotational direction, and is slidable in the axial direction within the length range of the parallel key groove 29a. It is installed in the shaft hole 29.

The slide shaft member 9 has a nozzle mounting portion 9b.
The nozzle member 33 is screwed and mounted. The nozzle member 33 has an outer cylindrical portion 33a having an overall cylindrical shape.
And a nozzle portion 33b fitted in the outer cylindrical portion 33a. A very small diameter nozzle hole is formed in the nozzle part 33b, and the coolant 122 is injected and supplied from the coolant channel 31 into the drill head 10 through the nozzle hole. In addition, dust is prevented from entering the gap formed between the slide shaft member 9 and the sleeve member 8 by attaching a dustproof cap 34 made of an elastic material such as rubber to the distal end portion. Has been prevented.

The drill head 10 is composed of a drill pit 11 mounted at the tip and a pit support member 35 to which the drill pit 11 is attached. As shown in FIG. 4, the pit support member 35 is configured as a long-axis cylindrical body in which a coolant flow path 36 is formed throughout the entire length in the axial direction. The pit support member 35 has an inner peripheral screw of a reverse screw that is screwed to the outer peripheral screw 9a of the slide shaft member 9 on the inner peripheral wall of the base end portion 35a. The pit support member 35 is thereby connected to the distal end of the slide shaft member 9 and is integrally rotated.

The drill pit 11 is formed in a cylindrical shape by a sintered alloy in which diamond grains are mixed.
Is formed over the entire length in the axial direction. The drill pit 11 has a reverse screw formed on the outer periphery of a base end portion, and is attached by being screwed into an inner peripheral screw provided on an inner peripheral wall at a distal end portion of the drill pit support member 35. Therefore, when the drill pit 11 is worn due to the drilling operation, the drill pit 11 can be replaced separately from the drill pit support member 35. Although not described in detail, a slit-shaped groove is formed in the drill pit 11 in the axial direction from a tip end thereof in order to efficiently discharge cutting powder generated from inside the drilled hole to the outside.

In the wet rotary drill device 1, when the power switch is operated and the drive motor of the drive unit 2 is started, the rotary shaft member 7 of the drill body 5 connected by the chucking mechanism 4 is driven to rotate. In the wet rotary drill device 1, the sleeve member 8 and the slide shaft member 9 are driven to rotate integrally with the rotation of the rotary shaft member 7, and the drill head 1 connected to the distal end of the slide shaft member 9 is rotated.
0 is rotationally driven. The wet rotary drill device 1 is provided with the drill pit 1 via the bit support member 35 of the drill head 10.
1 rotates, and the drill pit 11 causes the wall 120 to rotate.
Then, a repair hole 121 and the like are formed.

In the wet rotary drill device 1, when the drill pit 11 pierces the repair hole 121 in the wall surface 120, the coolant 122 is injected and supplied into the repair hole 121 as shown in FIG. The coolant 122 is supplied from the coolant supply unit to the drill main body 5 via the connecting pipe member 21, and is formed in the shaft hole 23 of the rotary shaft member 7 from the coolant supply passage 20 of the housing 6. It is injected and supplied to the supply space 23a. In the wet rotary drill device 1,
By pressing the drill pit 11 against the wall surface 120, the slide shaft member 9 moves through the drill head 10 in the slide shaft hole 29 of the sleeve member 8 toward the base end. In the wet rotary drill device 1, since the slide shaft member 9 presses the coolant backflow prevention valve member 12 toward the base end side against the elastic force of the coil spring 27, the coolant backflow prevention valve member 12 makes use of the coolant backflow prevention valve member 12. The coolant outlet 28 of the closed sleeve member 8 is opened.

In the wet rotary drill 1, the coolant supply space 23 a in the rotary shaft member 7 communicates with the coolant channel 31 of the slide shaft member 9, and the coolant 122 connects the nozzle member 33 with the coolant 122. Drill head 10 through
Is supplied to the inside of the coolant passage 36. The coolant 122 flows through the inside of the drill head 10 and is injected and supplied from the nozzle of the drill pit 11 into the inside of the repair hole 121. The coolant 122 is sprayed and supplied into the repair hole 121 to be in an atomized state by the action of the mixed auxiliary agent.
Is rapidly vaporized and diffused in the repair hole 121 by the frictional heat. The coolant 122 cools the drill pit 11 by the heat of vaporization together with the cooling water of the base material, and keeps the drill pit 11 in a good state to perform the drilling operation of the repair hole 121.
In addition, since the coolant 122 vaporizes in the repair hole 121 and rapidly expands its capacity by several hundred times, the coolant 122 assumes a state in which the coolant is injected into the repair hole 121 at a higher pressure. Efficiently discharge chips and the like to the outside together with the cooling water for the material.

In the wet rotary drill device 1, chips and dust discharged from the repair hole 121 as described above
It is mixed with the cooling water of the base material of the injected coolant 122 and discharged as gel dust 123. Since the wet rotary drill device 1 uses the above-described coolant 122, the wet rotary drill device 1 has a gel dust 12 compared to the conventional wet rotary drill device 100.
Although the generation amount of the particles 3 is greatly suppressed, the dust scattering prevention mechanism 13 surely prevents the scattering or dripping along the wall surface or the like.

Also, the wet rotary drill device 1 has a repair hole 1
The evaporation of the cooling water of the base material is promoted by the azeotropic phenomenon of the coolant 122 remaining in the inside of the inside with the low boiling organic solvent and the liquefied gas, so that the inside of the repair hole 121 is dried in a short time. In the wet rotary drill device 1, the actual working time required for drilling the repair hole 121 is almost the same as that of the conventional rotary drill device, but the setup time is greatly shortened and the efficiency is improved by simple work. Can be In addition, the wet rotary drill device 1 achieves a drastic reduction in the construction period because the drying time of the repair hole 121 is also about one tenth as compared with the case where only the cooling water is used.

Further, the wet rotary drill device 1 is small and lightweight, and does not require the routing of a long hose for supplying cooling water or compressed air, so that the work can be performed safely at high places such as walls and ceilings. Make it possible. Furthermore, since the wet rotary drill device 1 does not require a large amount of cooling water,
It can be used at sites without water supply facilities, and does not cause inconveniences such as water leakage disasters such as downstairs due to spilled cooling water and soiling of the site.

In the wet rotary drill 1, the wall 1
By providing a dust scatter prevention mechanism 13 that seals the periphery of the drill pit 11 that drills the repair hole 121 in the repair hole 20, the scattering of the gel dust 123 generated from the repair hole 121 or the dripping onto the floor surface is reliably prevented. Is done. Therefore, the wet rotary drill device 1 requires little labor for post-processing after drilling, greatly improves the overall work efficiency, and is extremely effective especially for indoor work. Further, the wet rotary drill device 1 is provided with the dust scattering prevention mechanism 1.
3 prevents workers from being exposed to dust, and significantly reduces noise.

Further, the wet rotary drill device 1 is small and lightweight, and does not require the routing of long hoses for supplying cooling water or compressed air, and can safely perform work on high places such as walls and ceilings. Make it possible. Furthermore, since the wet rotary drill device 1 does not require a large amount of cooling water,
It can be used at sites without water supply facilities, and does not cause inconveniences such as water leakage disasters such as downstairs due to spilled cooling water and soiling of the site.

As shown in FIGS. 1 and 2, the dust scattering prevention mechanism 13 is combined with the drill body 5 so as to be located at the tip of the drill head 10 by a drill guide mechanism 14. The dust scattering prevention mechanism 13 is specifically assembled to the base member 37 shown in FIG.
, A dustproof cover member 38, a first attachment member 39 and a second attachment member 40, a dust discharge guide member 41, an elastic seal member 42, a container mounting bracket member 43, and a dust discharge pipe member 44. And each member such as the dust container 45 and the coil spring 46. The dust scattering prevention mechanism 13 is configured such that the dustproof cover member 38
The combination is fixed by 7.

The dust-proof cover member 38 is formed in a substantially cup-like shape as a whole, and has a guide hole 37a provided in the base member 37 in a bottom wall 38b constituting a dust storage space 48 inside by an outer peripheral wall 38a. A guide hole 38c through which the drill head 10 penetrates is provided.
Guide hole 37a of base member 37 and dustproof cover member 3
The 8 guide holes 38c have an inner diameter larger than the outer diameter of the standard drill head 10, and are configured so that they can be used as they are even when a relatively large diameter drill head 10 is used.

The dustproof cover member 38 has a positioning step 38d corresponding to the positioning step 37b formed on the main surface of the base member 37 at the rear end of the outer peripheral wall 38a projecting in the axial direction from the bottom wall 38b. Are formed. The dustproof cover member 38 includes the positioning step 37 b and the positioning step 3.
8d are engaged with each other while being positioned with respect to the base member 37 by relative engagement with the base member 37. Therefore, the dust-proof cover member 38 is accurately assembled to the base member 37, in other words, hermeticity is maintained. Further, the dust-proof cover member 38 can be combined with the base member 37 by a simple operation. The positioning structure between the base member 37 and the dust-proof cover member 38 includes a positioning step 37b and a positioning step 38.
However, the present invention is not limited to the configuration of d. For example, the positioning may be performed by positioning protrusions and positioning recesses formed on opposite side surfaces of these members.

The dustproof cover member 38 has an outlet 49 for attaching the dust discharge pipe member 44 below the outer peripheral wall 38a. Further, a first attachment member 39 and a second attachment member 40 are attached to the opening of the dustproof cover member 38. Further, the dustproof cover member 38 has a dust discharge guide member 41 joined to the bottom wall 38a located in the dust storage space 48 and an elastic seal member 42 joined to the back side of the bottom wall 38a.

The first attachment member 39 is formed in a substantially ring shape from a somewhat elastic elastic material such as natural rubber or synthetic rubber, and its base end is fixedly joined to the opening of the dustproof cover member 38. First attachment member 39
Although the details are omitted, the distal end side is formed in a double ring shape, and the distal end portion is elastically deformed at the inner and outer peripheries, thereby improving the adhesion to the wall surface 120.
The first attachment member 39 has a second
Is attached. The second attachment member 40 is formed in a ring shape by using a material such as urethane resin or foam synthetic resin. The second attachment member 40 is elastically deformed while being supported by the first attachment member 39 and elastically contacts the wall surface 120. The first attachment member 39 and the second attachment member 40 further improve the adhesion to the wall surface 120 by such a configuration.

As shown in FIG. 8, the dust discharge guide member 41 is formed to have a right-angled triangular cross section, and a guide hole through which the drill head 10 penetrates corresponds to the guide hole 38 b of the dust-proof cover member 38. 41a are formed. As shown in FIG. 9, the dust discharge guide member 41 is joined to the bottom wall 38 a so that the inclined surface faces the discharge port 49 of the dustproof cover member 38. Therefore, the gel dust 123 is efficiently discharged from the dust storage space 48 of the dust-proof cover member 38 to the outlet 49.

The elastic seal member 42 is made of natural rubber or synthetic rubber and is formed to have a simple ring shape having a center hole 42a whose inner diameter is slightly larger than the outer diameter of the drill head 10 to be used. I have. The diameter of the center hole 42a is slightly smaller than the inner diameter of the guide hole 38b of the dustproof cover member 38. Therefore, the elastic seal member 42 is provided with the dust storage space 48 of the dustproof cover member 38 in association with the drilling operation.
The gel dust 123 discharged into the inside is guided by the guide hole 41a of the dust discharge guide member 41 and the guide hole 38c of the bottom wall 38b.
And the outer periphery of the drill head 10 is prevented from flowing out of the gap, and the hermeticity is maintained.

Since the elastic seal member 42 is formed in a simple ring shape as described above, it can be manufactured at a low cost. Further, since the outer peripheral surface of the drill head 10 rotating at a high speed rubs the center hole 42a, the elastic seal member 42 may be worn due to long-term use, and the sealing function may be impaired. Elastic seal member 4
2 is also exchanged when the drill head 10 conforming to the specification is mounted to drill the repair holes 121 having different hole diameters. In the wet rotary drill device 1, maintenance cost can be reduced since only the inexpensive elastic seal member 42 is attached to and detached from the dust-proof cover member 38. In addition, the wet rotary drill device 1 retains the function of the dust scattering prevention mechanism 13 because the elastic seal member 42 is easily attached and detached, and is excellent in handleability.

A container mounting bracket member 43 is mounted on one end side of the base member 37 on the back side thereof. As shown in FIG. 8, the container mounting bracket member 43 has its free end side extended near the lower part of the outer peripheral wall 38 a of the dustproof cover member 38. The container mounting bracket member 43 has a mounting hole 43a at the free end corresponding to the discharge port 49.
Is provided, and the dust discharge pipe member 44 having one end fitted to the discharge port 49 penetrates. Dust discharge pipe member 44
Has an overall cylindrical shape, and is attached to the dustproof cover member 38 by screwing an outer peripheral screw formed at one end into an inner peripheral screw formed at the inner wall of the discharge port 49. The dust discharge pipe member 44 is kept hermetically sealed from the discharge port 49 by a coil spring 46 mounted in a compressed state between the dust discharge pipe member 44 and the container mounting bracket member 43.

The other end of the dust discharge pipe member 44 has a lid 50.
Through to the inside of the dust container 45. Although the dust discharge pipe member 44 is configured as a straight cylindrical member, for example, when the end facing the dust container 45 is bent into a U-shape and the wet rotary drill device 1 is tilted. May be configured so that the gel dust 123 does not flow backward.

The dust container 45 is formed of a synthetic resin or the like into a wide-mouth bottle shape, and is assembled by screwing the lid 50 fixed to the container mounting bracket member 43. Therefore, the dust container 45 is
Then, the gel dust 123 accumulated inside by the perforation work by dismounting from the position 0 is discarded. Also, the lid 50
Is provided with a disposal hole 50a, and the drill body 5
By tilting, the dust dust 123 accumulated inside can be discarded without removing the dust container 45.

The dust scattering prevention mechanism 13 configured as described above has an elasticity by pressing the first attachment member 39 and the second attachment member 40 against the wall surface 120 when the repair hole 121 is pierced. It is deformed and adheres to the wall surface 120. The dust scattering prevention mechanism 13 is configured to remove the gel-like dust 1 generated from inside the repair hole 121 due to the drilling operation.
23 is received inside the dustproof cover member 38 and flows to the dust discharge pipe member 44 along the inclined surface of the dust discharge guide member 41. Dust scattering prevention mechanism 1
3 flows and accumulates the gel dust 123 from the dust discharge pipe member 44 into the dust storage container 45.

As described above, the dust scattering prevention mechanism 13 improves the adhesion to the wall surface 120 by the first attachment member 39 and the second attachment member 40, and the dust-proof cover member 38 by the elastic seal member 42. The sealing performance is improved. As described above, the dust scattering prevention mechanism 13 may damage the hermeticity of the dust-proof cover member 28 due to wear of the guide holes of the respective parts due to the rubbing of the drill head 10 rotating at a high speed as described above. This can be achieved by replacing only the inexpensive elastic seal member 42 without performing the above operation.

In the dust scattering prevention mechanism 13, when the repair holes 121 having different hole diameters are formed, the hermeticity of the guide holes 38 c of the dust-proof cover member 38 is not maintained by replacing the drill head 10. Sometimes. In the wet rotary drill device 1, the elastic seal member 42 is easily attached to the dustproof cover member 38, so that the replacement can be achieved by exchanging the elastic seal member 42 without replacing the dust scattering prevention mechanism 13 as a whole. It is planned. Of course, the wet rotary drill device 1 is provided with the guide hole 38c.
In some cases, the drill head 10 having a diameter larger than the inner diameter may be used. In this case, the dust-proof cover member 38 can be precisely combined with the base member 37 by a simple operation, so that the correspondence can be simplified. Done.

The base member 37 is connected to the drill guide mechanism 14
Of the supporting member. As shown in FIG. 7, the base member 37 is formed of a somewhat thick aluminum metal plate or the like so as to have a substantially horizontally long elliptical shape, and has the above-described guide hole 37a through which the drill head 10 penetrates and a dustproof cover at the center. A positioning step 37b for positioning the member 38 is provided. A screw hole 37c for a set screw 47 for screwing the dustproof cover member 38 is formed around the guide hole 37a. The base member 37 has a guide hole 37a.
The mounting holes 37d, 37d to which the drill guide mechanism 14 is mounted are formed on both sides of the hole. further,
The base member 37 has a pit positioning mechanism 1 near both ends.
7 are formed, and guide grooves 37f through which the gauge mechanism 51 penetrates are cut out in a part of the upper edge.

As shown in FIGS. 2 and 9, a pair of left and right drill guide mechanisms 14 are provided between the housing 6 and the bracket member 37. As shown in FIG. 9, the drill guide mechanism 14 has a shaft hole 5 having one end formed in the housing 6.
2, a guide cylinder member 53, a slide cylinder shaft member 54, a dustproof cylinder member 55, and a coil spring 5
6 and members such as a stopper screw 57 and a mounting screw 58. The slide cylinder shaft member 54 is slidably mounted in a shaft hole of the guide cylinder member 53 and has a stopper screw 57 screwed into one end thereof.
3 is locked by abutting against the open end.

The dust-proof cylinder member 55 has a shaft hole having a diameter slightly larger than the outer diameter of the guide cylinder member 53 and a locking wall 55a on the distal end side.
And a distal end portion thereof is fitted into a mounting hole 37 d of the base member 37. Further, the dust-proof cylinder member 55 has an axial length sufficient to allow the front end of the guide cylinder member 53 to face the rear end of the shaft hole. The dust-proof cylinder member 55 includes a locking flange 55b having a diameter larger than the inner diameter of the mounting hole 37d protruding from the outer peripheral portion thereof.
7 against the back. The dustproof cylinder member 55 includes:
The distal end of the slide cylinder shaft member 54 protruding and exposed from the guide cylinder member 53 is inserted therethrough, and its locking wall 55a
Is hit against the inside. The slide cylinder shaft member 54 is attached to the dust-proof cylinder member 55
Is fixed to the locking wall 55a.

The coil spring 56 is connected to the guide cylinder member 5.
3 and the locking wall 55a of the dustproof cylinder member 55
And is mounted in a compressed state. Coil spring 56
Presses the dust-proof cylinder member 55 against the main surface of the base member 37, in other words, urges the dust scattering prevention mechanism 13 forward through the base member 37. In the natural state, the drill guide mechanism 14 is configured such that the second attachment member 40 is connected to the drill pit 1 as shown in FIG.
The dust scattering prevention mechanism 13 is positioned so as to form substantially the same plane as the front end portion of the first.

The drill guide mechanism 14 configured as described above adjusts and guides the relative position between the drill pit 11 and the dust cover member 38 of the dust scattering prevention mechanism 13 during the drilling operation. In other words, the drill guide mechanism 14 allows the slide cylinder shaft member 54 to move the guide cylinder member 5
3 and the coil spring 56 is gradually compressed via the base member 37. The drill guide mechanism 14 attaches the dustproof cover member 38 of the dust scattering prevention mechanism 13, in other words, the first attachment member 39 and the second attachment member 40 to the wall surface 120 by the elastic force of the coil spring 56. Press to maintain close contact. The drill guide mechanism 12 has functions of preventing scattering and dripping of dust and the like generated from the repair hole 121 drilled by the drill guide mechanism 12 and reducing the generation of vibration noise.

In the drill guide mechanism 14, as described above, the slide cylinder shaft member 54 slides inside the guide cylinder member 53, and the coil spring 56 expands and contracts. Dust generated during the drilling operation, gel dust 123 discarded from the dust container 45, and the like may adhere to the drill guide mechanism 14. In the drill guide mechanism 14, since the slide cylinder shaft member 54, which is a slide member, is covered with the guide cylinder member 53 and the dust-proof cylinder member 55, the slide cylinder shaft member 54 smoothly slides inside the guide cylinder member 53.

The wet rotary drill device 1 includes a drill pit 1
The drill head 10 is replaced when, for example, the hole 1 is worn or the repair hole 121 having a different hole diameter is formed. In the drill head 10, as described above, the rear end 38a of the pit support member 35 is screwed and supported by the outer peripheral screw 9a formed at the tip of the slide shaft member 9 by a reverse screw configuration. The slide shaft member 9 is integrated with the rotation shaft member 7 via the sleeve member 8 in the rotation direction. Since the rotating shaft member 7 is free when the power is not turned on, the rotating shaft member 7 is integrally rotated by rotating the pit supporting member 35. In the wet rotary drill 1, the drill head 10 is removed from the slide shaft 9 while the rotary shaft 7 is locked with a wrench or the like as in the prior application wet rotary drill 100 by providing the rotary shaft lock mechanism 15. This eliminates the need for complicated operations.

As shown in FIGS. 4 and 5, the rotating shaft lock mechanism 15 includes members such as a lock lever 60, a lock pin 61, and a return spring 62 which are disposed in a built-in portion 59 which is recessed in the housing 6. Composed of Housing 6
A lock hole 6a in the height direction is formed at the bottom of the built-in portion 59 and communicates with the enlarged diameter shaft hole portion 19c of the shaft hole 19. The lock hole 6a is provided at a position corresponding to a lock hole 7e formed on the outer peripheral surface of the enlarged diameter shaft portion 7c of the rotary shaft member 7. One end of the lock lever 60 is swingably supported by a support shaft 60a supported on the built-in portion 59, and an operation portion 60b is integrally formed on the upper surface of the distal end. On the lock lever 60, a support shaft 61a of a lock pin 61 is supported below the operation portion 60b, and a spring receiving recess 6 is provided.
0c is formed.

The lock pin 61 has an upper end portion swingably supported by a support shaft 61a, and a distal end portion thereof
Of the lock hole 6a. The lock pin 61
As described later, it has a length that can penetrate through the lock hole 6a and relatively engage with the lock hole 7e of the rotating shaft member 7. The return spring 62 is disposed in a compressed state between the spring receiving recess 60 c of the lock lever 60 and the spring receiving recess 6 b provided in the housing 6. The return spring 62 pushes the lock lever 60 upward as shown in FIG. The lock pin 61 is held at a position retracted upward from the lock hole 7e of the rotary shaft member 7 when the lock lever 60 is pushed upward. The rotation shaft lock mechanism 15 thereby allows the rotation shaft member 7 to be freely rotated in the shaft hole 19 of the housing 6.

The rotating shaft lock mechanism 1 configured as described above
Reference numeral 5 indicates that when the drill head 10 is replaced or the like, the lock lever 60 is pushed down into the built-in portion 59 via the operation portion 60b against the elastic force of the return spring 62. As a result of this operation, the lock shaft 61 of the rotation shaft lock mechanism 15
A slide operation is performed inside the lock shaft 7a to enter the lock hole 7e of the rotary shaft member 7, and the rotary shaft member 7 is held in a locked state. In this state, the wet rotary drill device 1 rotates the rear end portion 35a of the pit support member 35 of the drill head 10 using a wrench or the like to rotate the drill head 1 from the slide shaft member 9.
0 should be removed. In addition, the wet rotary drill device 1
Attach the replacement drill head 10 to the slide shaft member 9 using a spanner or the like.

In the wet rotary drill device 1, the drill pit 1 is used during drilling work or during maintenance or the like corresponding to wear.
Sometimes only one is replaced. Wet rotary drill 1
As described above, the dust scatter prevention mechanism 13 is provided at the tip of the drill head 10 so that the drill pit 1
The dust scattering prevention mechanism 13 hinders the operation of attaching / detaching the 1 to / from the bit support member 35. For this reason, in the wet rotary drill device 1, the above-described drill guide mechanism 14 is operated to move the dust scattering prevention mechanism 13 to the housing 6.
A guide lock mechanism 16 is provided to move the drill pit 11 to the side to keep the drill pit 11 exposed.

The guide lock mechanism 16 is provided at a position where the dust scattering prevention mechanism 13 covers the drill pit 11 when the wet rotary drill device 1 is carried or the like.
Is set to lock securely. Of course, the guide lock mechanism 16 sets the drill guide mechanism 14 in a free state so that the dust scattering prevention mechanism 13 can be freely slid during the drilling operation. The guide lock mechanism 16 thus switches and sets the drill guide mechanism 14 between the completely locked state, the free state, and the intermediate locked state.

The guide lock mechanism 16 is shown in FIGS.
As shown in the figure, a pair of left and right operation concave portions 63 provided in the housing 6 corresponding to the drill guide mechanism 14 are provided. The guide lock mechanism 16 includes the lock lever 6.
4, switching cam member 65, torsion spring 66
And the like. The lock lever 64 is formed in a substantially crank shape as a whole, and its center portion is rotatably supported by a support shaft 64 a erected on the housing 6. One end of the lock lever 64 is formed in a hook shape to constitute a lock portion 64b, and the other end thereof constitutes an operating portion 64c. The lock portion 64b enters and retracts into a slide area of a stopper screw 57 screwed to the base end of the slide cylinder shaft member 54 of the drill guide mechanism 14 as described later.

The switching cam member 65 is formed in the shape of a rectangular block as a whole, and is slightly eccentric from the center with respect to a support shaft member 65a which is rotatably supported by penetrating the housing 6 from side to side. Installed with. The switching cam member 65 is attached to the support shaft member 65a such that the outer peripheral surface faces the operating portion 64c of the lock lever 64. The switching cam member 65 has a first cam recess 65b, a second cam recess 65c, and a third
Are formed. The first cam concave portion 65b is formed at a position where the interval between the first cam concave portion 65b and the support shaft member 65a is the largest. The second cam recess 65c is formed at an intermediate interval position. The third cam recess 65d is formed at a position where the distance between the third cam recess 65d and the support shaft member 65a is smallest.

A coil spring 68 is provided between the operating portion 64c of the lock lever 64 and the outer peripheral surface of the switching cam member 65.
, A click ball 67 is provided. The lock lever 64 is given a counterclockwise rotation behavior in FIG. 9 by a torsion spring 66 mounted on the support shaft member 65a. Therefore, the lock lever 64
Is held at the switching position by the click ball 67 being relatively engaged with each cam recess. Of course, the torsion spring 66 exerts a greater elastic force on the lock lever 64 than the coil spring 68.

As shown in FIG. 9, the guide lock mechanism 16 configured as described above is configured to
4c, the first cam recess 65b of the switching cam member 65
Are set to be opposed to each other, the slide operation of the slide cylinder shaft member 54 of the drill guide mechanism 14 is enabled. That is, the lock lever 64 is in a position where the entirety is turned clockwise as shown in FIG. 4, and the lock portion 64 b at the tip is held at a position where the lock portion 64 b is retracted from the sliding area of the slide cylinder shaft member 54. The drill guide mechanism 14 thereby enables the dust scattering prevention mechanism 13 to be slidable with the drilling operation.

The wet rotary drill device 1 includes a drill pit 1
When the replacement of the drill pit 1 is performed, the dust scatter prevention mechanism 13 is moved toward the housing 6 to expose the drill pit 11 and, as shown in FIG. The switching operation is performed so that the second cam recess 65c of the switching cam member 65 is opposed to the operating portion 64c. Drill guide mechanism 14
The slide cylinder shaft member 54 is slid in accordance with the movement operation of the dust scattering prevention mechanism 13, and its base end projects from the rear end of the guide cylinder member 53. Slide cylinder shaft member 5
In 4, an engagement recess 54 a formed in the outer periphery of the base end is exposed from the rear end of the guide cylinder member 53.

On the other hand, the guide lock mechanism 16
4c, the second cam recess 65c of the switching cam member 65
Are opposed to each other, so that the lock lever 64 is slightly rotated clockwise by the elastic force of the torsion spring 66. As a result, the lock lever 64 abuts on the lock portion 64 b at the distal end with the outer periphery of the slide cylinder shaft member 54. When the lock portion 64b is positioned at the position corresponding to the engagement recess 54a in accordance with the sliding operation of the slide cylinder shaft member 54, the lock lever 64 engages with the lock recess 64a as shown in FIG. Hold with. The wet rotary drill device 1 locks the slide cylinder shaft member 54 by the lock lever 64, and thereby the drill pit 11
Is kept exposed from the dust scattering prevention mechanism 13 so that the drill pit 11 can be easily replaced.

In the wet rotary drill device 1, the drill lock mechanism 16 is locked by the guide lock mechanism 16 so that the dust scattering prevention mechanism 13 covers the periphery of the drill pit 11 when being carried. That is, the guide lock mechanism 16 is switched so that the third cam recess 65d of the switching cam member 65 faces the operating portion 64c of the lock lever 64 as shown in FIG. The lock lever 64 is further rotated clockwise as a whole as shown in the figure, so that the lock portion 64b at the tip advances into the slide area of the slide cylinder shaft member 54.

The lock lever 64 abuts against a stopper screw 57 screwed to the rear end of the slide cylinder shaft member 54 by this operation.
Is disabled. The wet rotary drill device 1 holds the dust scattering prevention mechanism 13 covering the drill pit 11 by the locking operation of the slide cylinder shaft member 54 by the lock lever 64, that is, holds the drill pit 11 in a completely locked state.

As described above, the wet rotary drill device 1 includes the dust scattering prevention mechanism 13 for preventing the scattering and dripping of the gel dust 123 generated by the drilling operation, and guides the dust scattering prevention mechanism 13 to the guide. The drill lock mechanism 14 is switched between a fully locked state, a free state, and an intermediate locked state by the guide lock mechanism 16, thereby facilitating the replacement operation of the drill pit 11 and the dust scattering prevention mechanism 13 for carrying or the like.
Thereby, the drill pit 11 is protected. The guide lock mechanism 16 is not limited to the components described above.

The wet rotary drill device 1 is provided with a pit positioning mechanism 17 in order to enable the repair hole 121 to be drilled at an accurate position on the wall surface 120 by the cylindrical drill pit 11. Pit positioning mechanism 1
As shown in FIGS. 2 and 7, a pair of right and left 7 is assembled to a bracket member 37 with a dustproof cover member 38 of the dust scattering prevention mechanism 13 described above interposed therebetween. As shown in FIG. 12, the pit positioning mechanism 17 has a guide cylinder member 69 that is attached through a mounting hole provided in the base member 37.
, A nut member 70, a slide shaft member 71 having a positioning pin 72 provided at a distal end thereof, and a back cover member 73.
And a member such as a coil spring 74.

The guide cylinder member 69 is provided with the shaft hole 6 over its entire length.
9a is formed, a locking flange 69b is integrally protruded from an outer peripheral portion on the rear end side, and an outer peripheral screw 69c is formed from the locking flange 69b to an outer peripheral portion in a front region. The guide cylinder member 69 is connected to the base member 37.
Through the mounting hole from the rear side of the locking flange 69b.
Locked by. The guide cylinder member 69 is attached and fixed to the base member 37 as shown in FIG. 12 by screwing the nut member 70 into the outer peripheral screw 69c from the distal end side. The guide cylinder member 69 has its shaft hole 6
The slide shaft member 71 is inserted into and combined with 9a.

The axial length of the slide shaft member 71 is slightly larger than the axial length of the guide cylinder member 69, and the rear end of the slide shaft member 71 corresponding to the enlarged diameter shaft hole 69d corresponding to the locking flange 69b. A stopper convex portion 71a is integrally provided at the portion, and the positioning pin 72 is attached to the distal end portion as described above. The slide shaft member 71 is prevented from coming off from the front side by the stopper convex portion 71a abutting on the shaft hole step portion 69e of the guide cylinder member 69. A back cover member 73 having a bottomed tubular shape at the rear end is combined with the guide tubular member 69. Positioning pin 72
Is made of abrasion-resistant super-steel material or the like, and is formed in a chip shape having a sharp end portion.

The back cover member 73 has a bottom wall 7
A coil spring 74 is housed in a compressed state between 3a and the stopper projection 71a of the slide shaft member 71.
The slide shaft member 71 has a distal end provided with a projecting property from the guide cylinder member 69 by the elastic force of the coil spring 74, and is slidably mounted in the guide cylinder member 69. As the coil spring 74, a coil spring having a larger elastic force than the coil spring 56 of the drill guide mechanism 14 for urging the base member 37 forward is used.

The pit positioning mechanism 17 configured as described above applies the drill pit 11 to the piercing position of the wall surface 120 at the time of piercing operation, thereby positioning the positioning pin 7.
2 hits the wall 120. Pit positioning mechanism 17
Prevents the drill bit 11 whose flat surface abuts against the wall surface 120 from slipping and shaking by the positioning pin 72 abutted against the wall surface 120, and accurately moves the drill bit 11 relative to the drilling position. Make sure it is positioned.

Therefore, by the action of the pit positioning mechanism 17, the wet rotary drill device 1 can repair the repair hole to a predetermined drilling position without tilting the entire body and performing the counterbore operation by the outer peripheral edge of the drill bit 11 during the drilling operation. 1
21 perforations can be made. In the bit positioning mechanism 17, the dust scattering prevention mechanism 13 is supported by the drill guide mechanism 14 and slides with the drilling operation, but the positioning pin 72 abuts against the wall surface 120 by the elastic force of the coil spring 56. State is maintained. Of course, the pit positioning mechanism 17 is not limited to the above-described components, and for example, the positioning pins 72 may be directly erected on the base member 37.

The wet rotary drill 1 has a gauge mechanism 5 for defining the depth of the repair hole 121 drilled in the wall 120.
1 is provided. As shown in FIG. 2, the gauge mechanism 51 includes a guide cylinder member 75 whose one end is cantilevered by the housing 6, and a shaft hole 75 of the guide cylinder member 75.
a gauge rod 76 slidably supported in a.
Although the details are omitted, the positioning member 77 is provided in the guide cylinder member 75. Gauge rod 76
The tip of the drill pit usually projects forward from a notch 37 f of the guide formed in the base member 37, and forms substantially the same plane as the tip of the drill pit 11. The guide cylinder member 75 is provided with a display unit (not shown) for displaying the set position of the positioning member 77.

The gauge mechanism 51 has a repair hole 121 to be drilled.
Positioning member 77 using the display as an index based on the depth of
Is slid along the inside of the shaft hole 75a of the guide cylinder member 75. The gauge mechanism 51 includes the set positioning member 7.
The distance between the rear end of the gauge rod 76 and the rear end of the gauge rod 76 is the depth of the repair hole 121 to be drilled. The tip of the gauge rod 76 is abutted against the wall surface 120 during, for example, a drilling operation. The gauge rod 76 gradually slides rearward in the guide tube member 75 with the drilling operation.

Then, the gauge rod 76 is provided with a repair hole 121 having a predetermined depth in the wall surface 120 by the drill pit 11.
Is perforated, the rear end of the hole abuts against the positioning member 77 and is locked. The wet rotary drilling device 1 is thereby equipped with a drill pit 11, in other words a drill head 10.
Is not allowed to enter the wall 120, and the repair hole 121 having a predetermined depth is perforated. The gauge mechanism 5
1 is capable of confirming the depth of the repair hole 121 to be drilled based on the position of the gauge rod 76 with respect to the display unit.

The wet rotary drill device 1 has a handle member 22 in the drill body 5 as well as a hand-held portion (not shown) provided on the drive section 2 side as shown in FIG.
The handle member 22 is provided with a mounting hole 6c provided in the housing 6.
Is attached by screwing a screw portion 22a at the tip of the head. The handle member 22 is provided with a protection flange portion 22b that protrudes around the circumference between the screw portion 21a and the base portion, and a tool storage portion 78 that opens to the bottom surface inside the base portion. The tool storage section 78 is normally closed by fitting a lid member 79.

In the wet rotary drill device 1, a wrench is used when maintenance such as replacement of the drill head 10 or the drill pit 11 is performed. Further, when the nozzle hole of the drill pit 11 is clogged, the wet rotary drill device 1 removes foreign matter and the like using a pick-shaped tool. Further, in the wet rotary drill device 1, when a used aerosol can is discarded, a drilling tool is also used to pierce the aerosol can and release gas remaining inside. As shown in FIG. 3, the wet rotary drill device 1 is provided with these tools 81 housed in a tool housing 78 of the handle member 22 as an accessory.

In the wet rotary drill device 1, the special tool 81 is stored in the tool storage portion 78 of the handle member 22 and provided, so that a special storage space can be secured in the drill body 5 and the like. This is unnecessary, and the size of the device can be reduced. Further, the wet rotary drill device 1 stores the special tool 81 therein, thereby eliminating the trouble of taking out the tool from a tool box or the like placed at another place even during the drilling operation, and improving the working efficiency. Improvement is achieved.

In the wet rotary drill device 1, since the slide cylinder shaft member 54 of the drill guide mechanism 14 for guiding the dust scattering prevention mechanism 13 is covered with the dust-proof cylinder member 55, dust scattering is prevented during drilling work. Smooth operation is performed without causing the mechanism 13 to be caught. Further, the dust scattering prevention mechanism 13 is provided with an elastic seal member 42 for sealing the guide hole 38c that penetrates the drill head 10 of the dust-proof cover member 38, so that the sealing performance is improved. Further, the dust scattering prevention mechanism 13 is provided with a drill head 10 having a different outer diameter specification.
In the case where is used, it is not necessary to replace the whole, and it is possible to cope with it by simply replacing the elastic seal member 42. Therefore, the wet rotary drill device 1 does not need to have a large number of dust scattering prevention mechanisms 13 to reduce the maintenance cost and maintain the tightness by replacing the inexpensive elastic seal member 42 even when used for a long time. Reliability is maintained.

In the wet rotary drill 1,
The rotary shaft lock mechanism 15 enables the rotary shaft member 7 to be held in a locked state, and the guide lock mechanism 15 configures the dust scattering prevention mechanism 13 into a completely locked state, an intermediate locked state, and a free state. Accordingly, operations such as replacement of the drill head 10 and the drill pit 11 can be easily performed, and operability is greatly improved.

In the wet rotary drill 1 described above, the case where the repair hole 121 for repair is formed in a wall surface, a ceiling surface, or the like has been described. However, the use is not limited to this. Of course.

[0109]

As described above in detail, according to the wet rotary drilling apparatus of the present invention, a liquefied coolant obtained by mixing a low-boiling organic solvent with a liquid as a base material in an aerosol can is used. Sealing and spraying this coolant from the tip of the drill pit to pierce the wall, etc., so drilling work with low noise and low vibration is performed, and the whole is small, lightweight and extremely easy to handle. In addition, the drying time and setup time in the perforation are shortened to improve work efficiency,
Further, the safety of the worker can be ensured even when working at high places. In addition, the wet rotary drilling device is designed to reliably prevent the scattering and dripping of gel-like dust generated from the perforated part by the dust scattering prevention mechanism, thereby significantly suppressing the contamination of the wall surface and floor etc. And reduce noise.

Further, in the wet rotary drilling device, the sealing performance of the dust scattering prevention mechanism is improved by the elastic seal member, and the exchange of the drill head is performed by exchanging the elastic seal member. Maintenance costs can be reduced. The dust scattering prevention mechanism slides by the drill guide mechanism, but the slide part is covered with a dust-proof cover member to suppress the adhesion of dust, etc. Will be retained.

Further, the wet rotary drilling device is provided with a rotary shaft lock mechanism and a guide lock mechanism so that the work of exchanging the drill head and the drill pit can be easily performed. It is planned. In addition, the wet rotary drilling device stabilizes the drill pit against the perforated portion by the pit positioning mechanism, thereby achieving accurate drilling and simplifying the operation.

[Brief description of the drawings]

FIG. 1 is a side view of an essential part of a rotary rotary drill device according to an embodiment of the present invention, which is partially cut away.

FIG. 2 is a partially cutaway plan view of a principal part of the wet rotary drill device.

FIG. 3 is a vertical cross-sectional view of a main part illustrating a configuration of a drill main body of the wet rotary drill device.

FIG. 4 is an enlarged longitudinal sectional view of a main part of the drill main body, showing a state where a rotary shaft member is free.

FIG. 5 is an enlarged vertical sectional view of a main part of the drill main body, showing a state in which a rotary shaft lock mechanism is operated to lock a rotary shaft member.

FIG. 6 is an enlarged longitudinal sectional view of a main part of the drill main body, particularly illustrating details of a bearing mechanism of a rotary shaft member.

FIG. 7 is a front view illustrating a base member constituting a support member such as a dust scattering prevention mechanism provided in the wet rotary drill device.

FIG. 8 is a longitudinal sectional view illustrating the configuration of the dust scattering prevention mechanism.

FIG. 9 is a vertical sectional view of an essential part for explaining the configuration of a drill guide mechanism and a guide lock mechanism provided in the wet rotary drill device, and shows a state where the guide lock mechanism is set to a free position.

FIG. 10 is a vertical sectional view of a main part of the guide lock mechanism, showing a state where the guide lock mechanism is set to an intermediate lock position.

FIG. 11 is a longitudinal sectional view of a main part of the guide lock mechanism, showing a state where the guide lock mechanism is set to a completely locked position.

FIG. 12 is a vertical sectional view of a main part explaining a pit positioning mechanism provided in the wet rotary drill device.

FIG. 13 is an exploded perspective view illustrating the configuration of a wet rotary drill device of the prior application.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 wet rotary drilling device, 2 drive unit, 4 chucking mechanism, 5 drill body, 6 housing, 7 rotary shaft member, 8 sleeve member, 9 slide shaft member, 10
Drill head, 11 drill pit, 12 coolant check valve, 13 dust scattering prevention mechanism, 14 drill guide mechanism, 15 rotation axis lock mechanism, 16 guide lock mechanism, 17 pit positioning mechanism, 37 base member, 38 dustproof cover member , 39 1st attachment member, 40 2nd attachment member, 42 elastic seal member, 45 dust container, 51 gauge mechanism, 5
3 Guide cylinder member of drill guide mechanism, 54 Slide cylinder shaft member, 55 Dustproof cylinder member, 60 Lock lever of rotation axis lock mechanism, 61 Lock pin, 64 Lock lever of guide lock mechanism, 65 Switching cam member, 69
Guide cylinder member of pit positioning mechanism, 71 Slide shaft member of the same, 72 Positioning pin, Guide cylinder member of 75 gauge mechanism, 76 the same gauge rod, 120 wall surface, 12
1 repair hole, 122 coolant, 123 gel dust,

Claims (12)

[Claims] 1. A liquid containing a low-boiling point organic solvent mixed with a base material, and a coolant enclosed in an aerosol can in a liquefied state is injected and supplied from a drill pit provided at the tip of a drill head to pierce a wall or the like. A base member that is supported by a drill guide mechanism and is moved in accordance with the drilling operation of the drill pit, and the drill head is penetrated through a guide hole provided in a bottom surface portion to perform the drill pit. A dust outlet is provided on the outer peripheral wall of the dust cover, and the cup has a substantially cup-shaped dust cover that is assembled to the base member via positioning means. A ring-shaped elastic seal member that seals around the guide hole by being attached; A dust storage container for storing gel-like dust generated from a perforated portion such as a wall surface by the drilling operation of the drill pit and flowing into the dust-proof cover member and flowing out through the dust discharge port; A wet rotary drilling device, wherein an elastic seal member having an inner diameter adapted to an outer diameter of a drill head to be used is attached to the member. 2. A dust discharge pipe member having one end attached to the dust discharge port of the dust cover member and the other end inserted into the dust container. The wet rotary drilling device according to claim 1, wherein a coil spring that presses a lid of the dust container on a mounting surface of the base member to maintain a sealing property of a connecting portion is mounted. 3. An attachment member is attached to the opening of the dust-proof cover member, and the attachment member is formed into a ring shape by an elastic material such as rubber attached to the opening of the dust-proof cover member. A first attachment member, and a second attachment member formed into a ring shape from a soft material such as a sponge attached to an outer peripheral portion of the first attachment member and pressed against a wall surface or the like. The wet rotary drill device according to claim 1, wherein: 4. A liquid containing a low-boiling point organic solvent mixed with a base material, and in a liquefied state, a coolant enclosed in an aerosol can is injected and supplied from a tip of a drill pit constituting a drill head to a wall surface or the like. In a wet rotary drilling device for drilling, the drill is rotatably mounted in a housing, one end of which is connected to a driving unit, and the other end of which is screwed to a bit supporting member constituting the drill head. A rotary shaft member for driving the head to rotate and supplying a coolant from a coolant supply space provided inside the rotary shaft member; and an engagement portion formed on the housing and formed on the rotation shaft member so as to be relatively engageable. And a rotation shaft lock mechanism having a lock lever that is normally and normally held at a position disengaged from the engagement portion. By operating the rotation shaft lock mechanism, A wet rotary drill device wherein the drill head is attached and detached in a state where the lock lever is relatively engaged with the engagement portion and the rotary shaft member is locked. 5. A liquid containing a low-boiling point organic solvent as a base material, and a coolant enclosed in an aerosol can in a liquefied state being injected and supplied from the tip of a drill pit constituting a drill head to a wall surface or the like. In a wet rotary drilling device for drilling, a substantially cup-shaped dust-proof cover member covering the outer periphery of the drill pit is provided to prevent scattering and dripping of gel-like dust and the like generated from the drilling portion in association with the drilling operation. A dust scattering prevention mechanism, which is disposed between a base member for supporting the dust protection cover member of the dust scattering prevention mechanism and a housing of the drill body, and the dust prevention cover member is provided with respect to the perforated portion with the drilling operation. And a drill guide mechanism that supports the dust scattering prevention mechanism so as to slide while giving close contact behavior. A dust-proof cover member for covering a portion to be wetted is provided. 6. The drill guide mechanism has a cylindrical support member having one end supported by the housing in a cantilever manner, and one end side is slidably inserted into the cylindrical support member and is exposed from an opening at the distal end. A guide shaft member having a distal end on the other end side fixed to the bracket member, and an elastic member for urging the bracket member toward the distal end side to provide close contact with the perforated portion of the scattering prevention cover member, A cylindrical cover member having an inner diameter slightly larger than the outer diameter of the cylindrical support member and having one end fixed to the base member; The guide shaft member is inserted therein and has an axial length sufficient to cover at least a portion of the guide shaft member that protrudes and is exposed from the distal end opening of the cylindrical support member. Guy Wet rotary drilling device according to claim 5, characterized in that so as to prevent the adhering to the shaft member. 7. A liquid containing a low-boiling point organic solvent mixed with a base material, and in a liquefied state, a coolant enclosed in an aerosol can is injected and supplied from a tip of a drill pit constituting a drill head to a wall surface or the like. In a wet rotary drilling device for drilling, a dust scatterer having a substantially cup-shaped dust-proof cover member covering an outer peripheral portion of the drill pit and preventing scattering of gel-like dust and the like generated from the drilled portion with the drilling operation. Prevention mechanism, and a dust scattering prevention mechanism. The dust scattering prevention mechanism is disposed between a base member that supports the dust protection cover member and a housing of the drill body. And a drill guide mechanism for supporting the dust scattering prevention mechanism so as to perform a sliding operation while imparting the dust scattering prevention mechanism. A wet rotary drill device, wherein the dust cover member is locked and held by a guide lock mechanism at a position where the drill pit is exposed to the outside. 8. The drill guide mechanism has a cylindrical support member having one end supported by the housing in a cantilever manner, and one end side is slidably inserted into and supported by the cylindrical support member, and is exposed from an opening at the distal end. A guide shaft member having a distal end fixed to the base member, and an elastic member for urging the base member toward the distal end to impart close contact with the perforated portion of the dustproof cover member. The guide lock mechanism includes a lock lever rotatably supported by the housing at a rear position along the axis of the cylindrical support member and a cam means for switching the lock lever. The lock lever has at least its locking portion facing the slide operation area of the guide shaft member by the cam means, so that the slide operation of the guide shaft member is disabled. 8. The wet rotation according to claim 7, wherein a switching operation is performed between a first position in which the guide shaft member slides and a second position in which the guide shaft member is retracted from the slide operation region to enable the slide operation. 9. Drill equipment. 9. An engaging portion is formed on an outer peripheral portion of the guide shaft member, and a third portion is formed on the engaging portion by the cam means.
The locking portion of the lock lever, which has been switched to the position of, is engaged with the locking portion so that the dust cover member of the dust scattering prevention mechanism is locked and held at the sliding operation position exposing the drill pit. The wet rotary drill device according to claim 7, characterized in that: 10. A low-boiling point organic solvent mixed with a liquid as a base material, and in a liquefied state, a coolant enclosed in an aerosol can is injected and supplied from the tip of a drill pit constituting a drill head to a wall surface or the like. In a wet rotary drilling device for drilling, a dust scatterer having a substantially cup-shaped dust-proof cover member covering an outer peripheral portion of the drill pit and preventing scattering of gel-like dust and the like generated from the drilled portion with the drilling operation. A base member that supports the dustproof cover member of the dust scattering prevention mechanism, a guide shaft member that supports the base member slidably in the axial direction, and a dustproof member that urges the base member. An elastic member for providing the cover member with close contact with the perforated portion, and a cam means for setting the guide shaft member to a slidable state and a locked state. And a drill positioning mechanism provided at a target position around the drill pit with respect to the base member of the drill guide mechanism and having at least a pair of positioning pins slidable in the axial direction, A wet-type rotary drilling apparatus, wherein the drilling is performed while positioning the drill pit by abutting a tip of the positioning pin against a drilling surface in a state where a guide shaft member of the drill guide mechanism is locked. 11. The drill guide mechanism, wherein the positioning pin is slidably mounted in a guide cylinder member and an elastic member for urging the positioning pin toward the distal end is incorporated in the guide cylinder member. The wet rotary drill device according to claim 10, wherein 12. An elastic member incorporated in the guide cylinder member has a larger elastic force than an elastic member provided on the drill guide mechanism and providing the dustproof cover member with close contact with a perforated portion. The wet rotary drill device according to claim 10, wherein the rotary drill device acts on the positioning pin.