JP2009113192A - Hole diameter enlarging device such as core drill - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool capable of easily enlarging the diameter of an existing hole irrespective of the diameter and the shape of the hole in a drilling operation in which existing holes formed in the wall surface and the ceiling board of mortar and wood buildings are enlarged in diameter. <P>SOLUTION: The hole diameter enlarging device such as a core drill includes a loading part 1 (1A, 1B) so extensible as to be arranged while being fitted into the existing hole. A holding hole is so formed near the center of the loading part 1 that a center drill of a core drill or a center nail can be holdingly inserted thereinto to open a hole larger in diameter than the existing hole. Consequently, the entire part of the hole diameter enlarging device such as a core drill is not made instable, and the diameter enlarging operation can be easily performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for drilling in an enlarged diameter hole of an existing hole opening such as a wall surface in a building such as mortar, wooden, and ALC.

  Conventionally, it has been common to use a core drill in a drilling operation for the purpose of air conditioner, downlight, water supply or the like.

  However, when the diameter is small and the diameter is small when the existing hole is used, it is difficult to hold the center in the drilling operation using a center drill such as a core drill or a center nail. It's something that comes. Therefore, it is a work that is troublesome because it is performed manually by using other things such as turning or pulling.

Therefore, the following things are known by public relations to solve these problems.
Conventionally, an attachment / detachment device that has a shank attached to the drive shaft side of the drill device at one end and can attach the base end of the core drill and the base end of the center drill to the other end in a detachable manner concentrically. The center drill has an enlarged diameter drilling device having attachment portions at both ends having the same configuration as the attachment portion formed at the proximal end of the center drill that can be attached to and detached from the attachment portion of the attachment / detachment device. The attachment part at one end of the shaft is attached to the attachment part of the attachment / detachment device, and another attachment / detachment device having the same configuration is attached to the attachment part at the other end of the center shaft. An apparatus is provided for mounting a core drill having an outer shape equal to an existing hole in the apparatus. (For example, Patent Document 1)
Moreover, the apparatus which provided the attaching part fitted by the existing hole part in the auxiliary tool peripheral surface in diameter expansion hole work, and provided the holding | maintenance part which hold | maintains the center drill of a core drill, or a center pin in the auxiliary tool upper surface. Is provided. (For example, Patent Document 2)

  JP 2007-38351 PR   Japanese Laid-Open Patent Publication No. 2001-9619

However, the conventional enlarged-diameter device has the following problems.
In Patent Document 1, since a core drill having the same diameter as the existing hole diameter is required, various core drills are required, which is actually inconvenient.
In patent document 1 and patent document 2, if the existing hole is not circular, it is difficult to use. Furthermore, the center of the existing hole cannot be moved in various ways.
In Patent Document 2, it is difficult to use an existing hole in a state where the position of the existing hole is a hole on the front slope or a ceiling surface.

  Therefore, in view of the above-mentioned problems, the present invention provides various circular, elliptical, and irregular-diameter diameters when drilling existing holes such as air conditioners, waterworks, and gas in buildings such as mortar wooden and ALC. Even if it is a hole, the center drill of a core drill and the apparatus which hold | maintains a center nail are easily fitted, and an efficient diameter expansion hole operation | work is provided.

In order to achieve the above object, the present invention provides a device that can be fitted into an existing hole such as a wall surface or a ceiling surface in a mortar wooden structure, ALC, or the like to form an enlarged diameter hole, and can be locked to the existing hole. An opening is formed in a rectangular plate having a portion along the longitudinal center line.
A semi-fixed metal fitting is attached to the overlapped opening by using a plurality of the plates. An expansion / contraction fitting portion that can be expanded / contracted left / right or vertically is configured by rotating the rotation portion of the semi-fixed metal fitting in the forward / reverse direction.
In addition, a center drill of a core drill or an insertion hole for holding a center nail is provided at the center of the semi-fixed metal fitting, so that an efficient diameter expansion hole operation can be performed by a core drill or the like.

  In addition, the length of the holding part can be adjusted, and a locking piece is provided so that the end of the holding part can be held, so that it fits in accordance with various thicknesses of existing holes in the wall and ceiling. Since it can be mounted, the diameter-expansion hole device such as a core drill does not come off, so that the working efficiency can be increased.

  Further, the semi-fixed metal fitting attached to the opening can be removed, and the hole diameter can be exchanged with a hole diameter different from that of the insertion hole, so that it can be adjusted to the thickness of a center drill of another core drill or a center nail. It is provided so that it can be used, and the center part of various diameter expansion hole apparatuses can be held and used.

  Since it is configured as described above, the following effects can be obtained.

  According to the first aspect of the present invention, in the operation of making the hole larger than the diameter of the existing hole by the apparatus of the present invention, it is also possible to freely move the central point during the operation of the large diameter, so that the entire hole It is also possible to easily shift the position. Furthermore, even if the existing hole is not circular, it can be drilled with an enlarged diameter by a core drill or the like by simply mounting the apparatus.

  According to the second aspect of the present invention, the diameter-enlarged hole can be formed in a stable state on the ceiling surface or the inclined wall surface by being fitted to the inner diameter of the hole without being dropped by the locking piece. It can be set up.

  According to invention of Claim 3, even if it is what has different diameters, such as a core drill, a hole saw, or the nail of the center pin of a circle cutter, various drills can be used by replacing | exchanging the insertion hole of a center. Furthermore, even if the insertion hole is shaved due to aging and the diameter of the hole changes, it can be replaced and it is economical.

  Embodiments of the present invention will be described with reference to the drawings.

  An embodiment of an enlarged hole device such as a core drill, which is associated with the drilling of an enlarged diameter according to the present invention, will be described with reference to the drawings.

  1 to 5 show the first embodiment of the present invention. FIG. 1 is a front view. 2 is a bottom view seen from the back side of FIG. 1, FIG. 3 shows an embodiment in which a diameter-enlarged hole device such as a core drill of the present invention is fitted in a circular existing hole, and FIG. It is a front view. FIG. 4 is a side view in which the center drill of the core drill is inserted into the hole of the insertion hole in the diameter expansion hole device of the present invention.

1A in the drawing in the first embodiment is an upper telescopic fitting plate made of a rectangular metal plate, provided with a holding portion of 7A attached to a hole in the wall at one end of the back surface, and a longitudinal center line from the holding portion 7A. An opening of 2A is formed along Guide covers 14 are provided on both sides of the back surface of the upper opening 2A provided in the upper telescopic fitting plate 1A, and 15 guide ports are provided on the opposite side of the holding portion 7A.
1B is a lower expansion / contraction fitting plate, which has the same structure as the upper expansion / contraction fitting plate 1A, but is reduced in width and accommodated in the guide cover 14 from the guide port 15 of the upper expansion / contraction fitting plate 1A and slides back and forth. Configure as you can. The lower opening portion 2B and the holding portion 7B are provided on the lower telescopic fitting plate 1B in the same manner as the upper telescopic fitting plate 1A. As described above, the expansion / contraction fitting portion 1 includes the upper expansion / contraction fitting plate 1A and the lower expansion / contraction fitting plate 1B.
Therefore, the lower expansion / contraction fitting plate 1B is inserted into the upper expansion / contraction fitting plate 1A, and the four bolt fixing portions which are the semi-fixing portions are attached to the upper opening portion 2A and the lower opening portion 2B. Tighten and fix with nuts with fixing claws. As shown in FIGS. 11 and 12, reference numeral 3 denotes a center drill hole for inserting the center drill 10 of the core drill 9 into the center of the bolt fixing portion 4.
Further, 5 is a scale print, and 6A and 6B are shoulder portions of the respective telescopic fitting plates.

  In addition, even if the metal plate is a plate made of hard resin, it can be used similarly.

  Therefore, as shown in FIG. 3, when the telescopic fitting portion 1 is fitted into the existing hole 17 of the wall surface 18 as shown in FIG. 3, the value of the radius r of the existing hole 17 is used as the scale print 5 of the upper telescopic fitting plate 1A. Then, the value of the center point of the center drill hole 3 of the bolt fixing portion 4 (the value of the print 5 of the upper telescopic fitting plate 1A) is made equal to the radius r of the existing hole from the holding portion 7A. On the other hand, the value y (shown in FIG. 3) of the print 5 of the lower telescopic fitting board 1B and the value x (the figure) of the center point of the center drill hole 3 from the overlapping end of the upper telescopic fitting board 1A and the lower telescopic fitting board 1B. 3) is set to a value of r = x + y, and the nut 8 with the fixing claw of the bolt fixing portion 4 is tightened and fixed and fitted into the existing hole 17.

Further, when fitting into the irregular holes 24 shown in FIG. 5, the same as described above is performed, but when the center of the new hole 25 is moved, the value r1 of the upper telescopic fitting plate 1 is set to the value of r1> r. Then, when the value of x1 + y1 is r1> x1 + y1, or r1 <r, r1 <x1 + y1. Therefore, the center point of the center drill hole 3 fitted in the existing hole 17 can move.
In this state, the center drill 10 of the core drill 9 to be drilled with a new enlarged diameter is inserted into the center drill hole 3 and the core drill 9 is rotated. At this time, the center drill 10 performs the drilling operation of the newly-expanded hole 25 having an enlarged diameter by an accurate circular motion without any slip by the telescopic fitting portion 1.

FIGS. 6, 7, 8 and 9 show a second embodiment. FIG. 6 is a side view of a diameter-expanding hole device such as a core drill in a state of being sandwiched by the thickness of the wall by a screw-type holding portion. is there.
FIG. 7 is an enlarged partial view of the screw type holding portion. FIG. 8 is a side view of a portion in which the diameter increasing hole device such as the core drill of FIG. FIG. 9 is a front view of FIG.

  In FIG. 11A is an upper telescopic fitting plate, and 11B is a lower telescopic fitting plate, a screw type holding portion 22A having a screw as a shaft so as to be firmly sandwiched between the holding portions 7A and 7B of the first embodiment, And 19B are attached to the lower part of the screw-type holding part 22. Further, 21 locking piece tightening nuts are attached to the screw shafts on the surfaces of the upper and lower telescopic fitting plates 11A and 11B of the screw type holding portion 22, and 23 pressure springs are provided below the locking piece tightening nuts 21. Is provided. Furthermore, 20 locking piece rotation knobs for rotating the lower locking piece 19 are provided at the upper end of the screw shaft. .

Accordingly, with the above-described configuration, the diameter expansion hole device such as the core drill of the expansion / contraction fitting portion 11 provided with the screw type holding portion 22 shown in FIGS. 6 and 9 in the existing hole 17 is replaced with the upper expansion / contraction fitting plate 11A and the lower expansion / contraction fitting plate. 11B is adjusted and adjusted by adjusting the diameter of the existing hole 17 by the fixing claw nut 8 of the bolt fixing 4. Therefore, as shown in FIG. 8, it fits into the existing hole 17 and turns the locking piece rotary knob 20 so that the locking piece 19 faces the end of the wall 18 and the locking and tightening nut 21 moves in the tightening direction. Turn to pinch the end of the wall 18 between the locking piece 19 and the shoulders 16A and 16B, and fix the diameter expanding hole device such as the core drill.
The center drill 10 of the core drill 9 is inserted into the center drill hole 3 of the bolt fixing portion 4 of the diameter expanding hole device such as the core drill.

Even if the drill rotates in the set state as described above, a stable enlarged hole is drilled. Also, it does not fall off or slip out of the hole on the ceiling or the hole on the slope. The drilling operation can be performed easily.

In FIG. 10, the upper telescopic fitting plate 11 </ b> A having the screw-type holding portions 22 </ b> A and 22 </ b> B and the lower telescopic fitting plate 11 </ b> B and the upper telescopic fitting plate 1 </ b> A having the holding portion 7 </ b> A, respectively. The expansion / contraction fitting part 1 of the lower expansion / contraction fitting plate 1 </ b> B is configured as shown in FIG. 10 with the bolt fixing part 4 as the center.
Therefore, with this configuration, it is fitted into an existing hole 17 such as a wall surface. In this state, the screw type holding portions 22A and 22B are tightened and tightly attached. Moreover, it can be firmly fitted by contacting the holding portions 7A and 7B.

  From the above, even a large-diameter existing hole can be fitted in an extremely stable state, and a new enlarged hole can be opened.

  Further, in the third embodiment, when the diameter of the center drill 10 is different in the center drill hole 3 of the bolt fixing portion 4 shown in FIGS. 11 and 12, or the center drill of the cutting tool such as a circle cutter, the center nail By using this, the diameter of the center drill 3 can be replaced with a bolt fixing portion 4 that fits a small diameter so that it can be used for various purposes.

  From the above, the drilling operation of the enlarged hole can be efficiently handled in various conditions than the existing hole, and it is more economical.

  It is a front view which shows the 1st Example of this invention.   It is a figure which shows the 1st Example of this invention, and is the bottom view seen from the back side.   It is the front view which fitted the diameter expansion hole apparatus, such as a core drill, of this invention in the circular hole of the wall surface.   It is a side view which tries to insert the center drill of a core drill into the center drill hole in the state of FIG.   It is the front view which fitted diameter expansion hole apparatuses, such as a core drill, of this invention in the irregular hole.   It is a side view which shows the 2nd Example of this invention.   It is a partial expansion perspective view of a screw type holding part showing the 2nd example of the present invention.   It is an enlarged side view of the state which pinched | interposed the edge of the wall hole in the part of FIG.   It is a front view of the second embodiment.   It is a front view of diameter-expansion hole apparatus, such as a core drill, which comprises a plurality of (4) expansion / contraction fitting plates.   It is a side view of a bolt fixing | fixed part and a nut with a fixing nail | claw.   It is the front view which attached the nut with a fixed claw to the bolt fixing part.

Explanation of symbols

1A and 11A are upper expansion and contraction mounting plates 1B and 11B are lower expansion and contraction mounting plates 2A and 12A are upper opening portions 2B and 12B are lower opening portions 3 are center drill holes 4 are bolt fixing portions 5 are scale prints 6A and 16A, 6B and 16B are shoulder portions 7A and 7B are holding portions 8 is a nut with a fixed claw 9 is a core drill 10 is a center drill 14 is a guide cover 15 is a guide port 17 is an existing hole 18 is a wall surface 19 is a locking piece 20 is engaged Stop piece rotary knob 21 is a locking piece tightening nut 22A, 22B is a screw type holding part 23 is a pressure spring 24 is an irregular hole 25 is a new hole

Claims (3)

In an apparatus that is fitted into an existing hole such as a wall surface or a ceiling surface to expand the diameter, an opening is formed along a longitudinal center line on a rectangular plate having a holding portion that can be locked to the existing hole. .
A semi-fixed metal fitting is attached to the overlapped opening by using a plurality of the plates. An expansion / contraction fitting portion that can be expanded / contracted left / right or vertically is configured by rotating the rotation portion of the semi-fixed metal fitting in the forward / reverse direction.
Further, a core drill diameter expansion hole device, wherein an insertion hole for holding a center drill of a core drill or a center nail is provided at the center of the semi-fixed metal fitting.   The length of the holding part can be adjusted, and a locking piece is provided so that the lower end of the holding part can be held, so that it can be fitted according to various thicknesses of existing holes in the wall and ceiling. A diameter-expansion device for a core drill or the like according to claim 1.   The thickness of the center drill of another core drill or the center nail, etc., so that the semi-fixed bracket attached to the opening can be removed and replaced with a semi-fixed bracket having a hole diameter different from that of the insertion hole. The diameter-adjusting hole device for core drills and the like according to claim 1, wherein the device is provided so as to be able to be adapted to the above.

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