JP6468912B2 - Drill device for measuring neutralization of cylindrical concrete columns and guide device used therefor - Google Patents

Description

  The present invention relates to a drill apparatus for forming a drill hole for measuring the neutralization depth of a concrete structure.

Conventionally, Patent Document 1 proposes a method for measuring the neutralization depth of a concrete structure using a drill hole. In this method, a hole is drilled to a predetermined depth from the surface of a concrete structure with a drill, and a phenolphthalein solution is attached to the inner surface of the drill hole to develop a non-neutralized portion. Irradiate the inside and insert a caliper into the drill hole to measure the distance from the boundary between the colored part and non-colored part of the phenolphthalein solution to the surface of the concrete structure to determine the neutralization depth. It is what you want.
On the other hand, what was described in patent document 2 is proposed as an auxiliary | assistant tool for vertical hole drilling in a rotary drill tool. This auxiliary tool is provided with a fastening portion attached to the rotary drill tool, a mounting frame is fixed to the fastening portion, and an axis of a drill blade that is detachably attached to the tip of the rotary drill tool on the mounting frame. A support rod is provided in parallel, and the mounting frame is slidable with respect to the support rod. When the protrusion is fitted on the support rod and the fastening portion is slid in one direction with respect to the support rod, the fastening portion Is provided so as to return by the restoring force of the ridge, a contact plate orthogonal to the support rod is attached to the tip of the support rod, a window hole through which the tip of the drill blade is inserted is provided in the corresponding plate, and the drill blade A stopper rod that prevents the drill blade from entering the workpiece when it enters the workpiece is provided in parallel with the bearing rod, and a measuring rod that measures the difference between the tip of the drill blade and the tip of the stopper rod And slidable parallel to the drill blade.

JP 2010-230383 A Japanese Utility Model Publication 4-86108

As an apparatus for forming a drill hole for measuring the neutralization depth of the conventional concrete structure, when the conventional auxiliary tool for drilling a vertical hole is to be used, When the surface is flat, appropriate drilling can be performed, but when the subject has a curved surface like a concrete column, the contact plate cannot be fixed at a fixed position with respect to the curved surface, and the drill bit enters. There is a problem that the angle is not fixed.
Therefore, the present invention provides a drilling device dedicated to measuring the neutralization depth of a concrete structure, which can be drilled perpendicularly to the surface regardless of whether the surface of the subject is flat or curved. It is intended to provide.

Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
The drill device 1 of the present invention for solving the above problems includes an electric drill 2 and a guide member assembly 3 that is detachably attached to a main body 4 of the electric drill 2. The guide member assembly 3 supports the main body 4 of the electric drill 2 on the surface of the specimen concrete, and regulates the drilling direction and the drilling depth of the drill bit 7 in the specimen concrete. The guide member assembly 3 includes a clamp member 8 that grips the body 4 of the electric drill 2, a bit cover assembly 9 that allows the drill chuck 5 and the drill bit 7 to pass through in a relatively rotatable manner, and an axial direction of the drill bit 7. And a telescopic leg assembly 10 that extends in a telescopic manner and has a tip pressed against the concrete surface of the specimen. The bit cover assembly 9 has a cylindrical cover body 15 whose base end side is fixed to the clamp member 8, and the relative position can be adjusted so that the protruding length of the drill bit 7 can be changed to the distal end side of the cover body 15. And an adjustment head 16 to be screwed together. The extendable leg assembly 10 has four support legs 26 extending from the clamp member 8 so as to be extendable in the axial direction of the drill bit 7 so as to surround the four surroundings of the bit cover assembly 9 as a center.

  According to the drilling device of the present invention, if the tips of the four support legs come into contact with an object having a curved surface such as a concrete pillar, the vertical depth of the desired depth is surely secured to the surface. A hole can be drilled.

It is a front view of a drill device concerning the present invention. It is a side view of the drill apparatus of FIG. It is a top view of a part of drill device of FIG. It is a front view of the guide member assembly in the drill apparatus of FIG. It is a disassembled perspective view of the drill apparatus of FIG.

Embodiments of the present invention will be described with reference to the drawings.
The drill device 1 includes an electric drill 2 and a guide member assembly 3 that is detachably attached to the electric drill 2.

  The electric drill 2 is of a pistol grip type, and is detachably fixed to the main body 4, a drill chuck 5 provided on one end side of the main body 4, a handle 6 provided on the other end side of the main body 4, and the drill chuck 5. The drill bit 7 is provided.

  The guide member assembly 3 supports the main body 4 of the electric drill 2 on the surface of the concrete structure S that is a subject, and regulates the drilling direction and the drilling depth of the drill bit 7 to the subject S. The guide member assembly 3 includes a clamp member 8, a bit cover assembly 9, and a telescopic leg assembly 10.

  The clamp member 8 includes an upper member 11 and a lower member 12 that hold the columnar tip portion 4a of the main body 4 up and down. A grip member 13 for supporting the distal end side of the electric drill body 4 with one hand extends from the lower member 12. The upper and lower members 11 and 12 are fastened with screws 14.

  Each bit cover assembly 9 includes a substantially cylindrical cover body 15 and an adjustment head 16. The bit cover assembly 9 is fixed to the clamp member 8 on the base end side of the cover body 15 so as to penetrate the drill chuck 5 and the drill bit 7 so as to be relatively rotatable. The adjustment head 16 is screwed to the front end side of the cover main body 15 so that the protruding length of the drill bit 7 can be changed.

  The cover main body 15 includes a large-diameter cylindrical portion 17, a small-diameter cylindrical portion 18, and a mounting plate portion 19. The large-diameter cylindrical portion 17 surrounds the outer periphery of the drill chuck 5 with an interval. The small-diameter cylindrical portion 18 continues to the distal end side of the large-diameter cylindrical portion 17 and surrounds the outer periphery of the drill bit 7 with an interval. A male screw portion 18 a is formed on the outer periphery of the small diameter cylindrical portion 18. The mounting plate portion 19 extends in a substantially rectangular shape on the outer periphery of the base end side of the large diameter cylindrical portion 17, and has screw holes 21 for screwing the base end side of the guide pins 27 at the four corners. The cover main body 15 is fixed to the clamp member 8 with a screw 20 via a flanged bushing 23 in the attachment plate portion 19.

  The adjustment head 16 includes a connecting cylinder portion 24 and an inner flange portion 25 at the tip thereof. On the inner periphery of the connecting tube portion 24, a female screw portion 24 a that engages with the male screw portion 18 a of the cover main body 17 so that the relative position in the axial direction can be adjusted is provided.

  The extendable leg assembly 10 has four support legs 26 that extend from the clamp member 8 so as to be extendable in the axial direction of the drill bit 7 around the bit cover assembly 9 around the bit cover assembly 9. The support leg 26 includes four guide pins 27 and four support cylinders 28 that receive the guide pins 27 slidably in the axial direction.

  The guide pin 27 includes a small-diameter portion 29 and a large-diameter portion 31 that is continuous via a step portion 30 on the distal end side of the small-diameter portion 29. A screw portion 32 that is screwed and fixed to the screw hole 21 of the attachment plate portion 19 is provided at the base end portion of the small diameter portion 29.

  The column cylinder 28 includes a cylinder main body 33 and a lid ring 34, and is integrally coupled to each other by a connecting plate 36 on the distal end side. The cylinder body 33 holds a spring 35 therein and is closed at the tip, and slidably receives the large-diameter portion 31 of the guide pin 27. The lid ring 34 is screwed and fixed to the proximal end side of the cylinder body 33. The lid ring 34 freely penetrates the small diameter portion 29 of the guide pin 27 and prevents the large diameter portion 31 from coming off. A tip end portion 37 that is pressed against the concrete surface of the specimen is formed at the tip of the column cylinder 28. The connecting plate 36 has an opening 38 at the center through which the adjustment head 16 can be freely inserted.

  When a hole having a predetermined depth for measuring the neutralization of the concrete structure S is opened using the drill device 1, the adjustment head 16 is screwed to the cover body 15 to adjust the drill bit 7. Protruding length is set appropriately. By grasping the handle 6 and the grip member 13 and bringing the tip portions 37 of the four column cylinders 28 into contact with the surface of the concrete structure S, the drill bit 7 is disposed perpendicular to the surface. Even if the surface of the structure S is a curved surface, the drill bit 7 can be easily positioned. Since the pointed portion 37 bites into the surface of the concrete structure S, the drill device 1 can be stably fixed to the concrete structure S during the drilling operation. When the drill bit 7 is drilled in the concrete structure S by the protruding length, the tip of the adjustment head 16 comes into contact with the surface of the concrete structure S, so that a hole with a constant depth is always easily formed. Can do.

DESCRIPTION OF SYMBOLS 1 Drill apparatus 2 Electric drill 3 Guide member assembly 4 Drill main body 4a Column-shaped front-end | tip part 5 Drill chuck 6 Handle 7 Drill bit 8 Clamp member 9 Bit cover assembly 10 Telescopic leg assembly 11 Upper member 12 Lower member 13 Grip member 14 Screw 15 Cover body 16 Adjusting head 17 Large diameter cylindrical portion 18 Small diameter cylindrical portion 19 Mounting plate portion 20 Screw 21 Screw hole 23 Bushing with flange 24 Connecting cylinder portion 24a Female thread portion 25 Inner flange portion 26 Support leg 27 Guide pin 28 Strut cylinder 29 Small-diameter portion 30 Step portion 31 Large-diameter portion 32 Threaded portion 33 Cylinder body 34 Lid ring 35 Spring 36 Connecting plate 37 Pointed portion 38 Opening S Concrete structure

Claims (5)

A pistol grip type electric drill comprising a main body, a drill chuck provided on one end side of the main body, a handle provided on the other end side of the main body, and a drill bit whose base end side is detachably fixed to the drill chuck. When,
Wherein is detachably attached to the main body of the electric drill, to support the main body of the electric drill arcuate surface of a cylindrical concrete column is subject depth drilling the drilling direction of the drill bit to the arcuate surface of the subject A guide member assembly for regulating the thickness,
The guide member assembly includes a clamp member that holds a body of the electric drill, and the drill chuck and the drill bit that are fixed to the clamp member and project the distal end side of the drill bit to a predetermined length toward the distal end side. the drill bit and bit cover assembly having a through portion that relatively rotatably penetrates from each disposed so as to surround its four sides around the through portion of the bit cover assembly equidistant the bit cover assembly A telescopic leg assembly having four support legs that extend freely in the axial direction and have the tip pressed against the arcuate surface of the subject.
The bit cover assembly includes a cylindrical cover body whose proximal end is fixed to the clamp member, and an axial relative direction of the drill bit so that the protruding length of the drill bit can be changed to the distal end side of the cover body. An adjustment head screwed to adjust the position freely,
Four support legs of the telescopic leg assembly are provided so as to extend and contract integrally with the bit cover assembly while maintaining an equal distance in the axial direction of the drill bit. Drilling device for neutralization measurement. The telescopic leg assembly includes four guide pins extending in the axial direction of the drill bit from the clamp member so as to surround the four surroundings of the cover body, and the guide pins slide in the axial direction. Four strut cylinders as the support legs, which are freely received and hold a spring between the guide pins and integrally joined to each other;
The drilling device for neutralization measurement of a columnar concrete column according to claim 1, wherein a tip end portion pressed against the concrete surface of the specimen is formed at a tip of the column cylinder . The clamp member is fixed so as to surround the outer periphery of the front end of the electric drill body,
The cover main body includes a large-diameter cylindrical portion that surrounds the outer periphery of the drill chuck with a space therebetween, and a small-diameter cylindrical portion that continuously surrounds the outer periphery of the drill bit at a distal end side of the large-diameter cylindrical portion. And an attachment plate portion having a screw hole that extends to the outer periphery on the proximal end side of the large-diameter cylindrical portion and screwes the proximal end side of the guide pin at the four corners; And is screwed to the clamp member at the mounting plate portion,
The adjustment head includes a connecting tube portion having an internal thread portion on an inner periphery thereof, which is screwed to an external thread portion of the cover body so that the relative position in the axial direction is adjustable.
The guide pin includes a small-diameter portion having a screw portion that is screwed and fixed to a screw hole of the mounting plate portion at a base end portion, and a large-diameter portion that continues to a distal end side of the small-diameter portion via a step portion. And
The support cylinder is screwed and fixed to the base end side of the cylinder body so that the large diameter portion of the guide pin is slidably received and the small diameter portion of the guide pin is penetrated to prevent the large diameter portion from coming off. The cylindrical concrete columns according to claim 2, wherein the columnar concrete columns are integrally connected to each other at a distal end side by a connecting plate having a lid ring to be inserted and having an opening in the center for allowing the adjustment head to freely pass therethrough. Drilling device for neutralization measurement. The neutrality of the columnar concrete column according to any one of claims 1 to 3, wherein a grip member for supporting the distal end side of the electric drill body with one hand is attached to the clamp member. Drilling device for chemical measurement. A pistol grip type electric drill comprising a main body, a drill chuck provided on one end side of the main body, a handle provided on the other end side of the main body, and a drill bit whose base end side is detachably fixed to the drill chuck. A guide device that is detachably attached to the
A clamp member for gripping the body of the electric drill;
A bit cover assembly that is fixed to the clamp member and has a penetrating portion that penetrates the drill chuck and the drill bit in a relatively rotatable manner so that the tip portion of the drill bit protrudes a predetermined length on the tip side;
Telescopic leg assemblies that are arranged so as to surround the four surroundings of the bit cover assembly at equal distances around the through-hole of the bit cover assembly and extend from the bit cover assembly in an axial direction of the drill bit. Equipped,
The bit cover assembly includes a cylindrical cover body whose proximal end is fixed to the clamp member, and an axial relative direction of the drill bit so that the protruding length of the drill bit can be changed to the distal end side of the cover body. An adjustment head screwed to adjust the position freely,
The extendable leg assembly includes four support legs pressed against the arc-shaped table surface of the cylindrical concrete column tip is subject,
These four support legs, neutralization of cylindrical concrete columns, wherein Rukoto provided so as to expand and contract together while maintaining the same distance, respectively in the axial direction of the drill bit relative to the bit cover assembly Measuring drill guide device.

Images