FR2752761A1 - Angular positioning unit for portable drills - Google Patents

Abstract

Angular positioning unit in relation to the vertical for portable hand drills allowing the drilling of a hole according to a given angle. It comprises a sleeve (1) with a reference face (2) and two fixed spirit levels with bubbles, one spherical (3) and the other cylindrical (3'), for drilling respectively vertically or horizontally. One mobile spherical spirit level with bubble is used for drilling according to a given angle. An orientating mirror (4) is installed facing the level being used. A system of clamping (5,6,7) is provided together with a clamping handle (11).

Description

 The present invention relates to an angular positioning device, relative to the vertical, for portable drill.

 Drilling using a portable drill is traditionally done according to the eye of the user.

Generally, the hole must be perpendicular to the surface to be drilled.

 The stereoscopic vision being maximum in the plane passing through the two eyes and minimum in the perpendicular plane, this results in inaccuracy in the piercing obtained.

 The device according to the invention overcomes this disadvantage.

 Depending on the purpose, two models can be realized, using the same concept.

 Basic model for drilling a hole perpendicular to a vertical or horizontal surface.

 The device comprises a ring that is fixed on the nose of the drill. A spherical bubble level, integral with the ring, is with its base perpendicular to the axis of the drill.

 A second bubble level, but cylinder, integral with the ring, is with its axis parallel to the axis of the drill.

 Using the spherical level, the user can position the drill, along a vertical axis (drilling a hole in the ground or in a ceiling for example).

 Similarly, using the cylindrical level, the user can position the drill in a horizontal plane (drilling a hole in a wall for example).

 The stereoscopic vision of the user allows the user to keep the drill perpendicular to the wall in this horizontal plane.

 A mirror. articulated, positionable opposite one or the other of the two levels, allows to see the corresponding bubble, in some cases where direct vision is impossible.

 The accompanying drawings illustrate the invention of the basic model.

Figures I and 2 respectively represent the two front and left views of the device.

With reference to these drawings, the device comprises a fixing ring (I), a reference face (2), a spherical level (3), a cylindrical level (3 '), an articulated mirror (4), a mirror support (5) with spring washer (6), a mirror locking screw (7), two mirror-mirror threads (8), a depth-stop passage hole (9), a depth-stop locking screw ( po), a locking handle (II),
Before placement on the drill, the user can verify the verticality or theorizontalité of the surface to be pierced, putting the reference face of the device on the surface to be pierced. A slight angular difference observed can be reproduced during drilling, so as to finally obtain a hole perpendicular to the surface considered.

 Universal module s for drilling a hole perpendicular to a surface in any plane or, more zenerally, for drilling a hole, at a given angle, with respect to a surface in any plane.

 the device is a variant of the previous one.

 It also includes a ring that is fixed on the nose of the drill. This ring has a reference face and two alignment marks.

 Solidarity of this ring is a cylinder graduated in degrees, whose axis is perpendicular to the axis of the ring.

 A spherical bubble level has its base movable in rotation about the axis of the graduated cylinder. A device makes it possible to block this movement.

 The support of the level comprises a mark, situated in line with the graduations of the cylinder, which makes it possible to position the level at a given angle relative to the axis of the drill.

 Iln articulated mirror positioned in relation to the level, allows to see the bubble, in the case where the direct vision is: impossible.

 Using the spherical level, the graduated cylinder, the reference face and its marks, the user can position the drill along an axis having a given angle relative to a given plane.

Examples of use
Drilling a hole perpendicular to a horizontal surface (floor or ceiling for example).

 The device in place on the drill, the user positions the reference of the level support in front of 00 of the graduated cylinder and blocks the level support.

 The drill is then ready for drilling which is done by keeping as much as possible the bubble at the center of the level.

 Drilling a hole perpendicular to a vertical surface (wall for example).

 the device in place on the drill, the user positions the mark of the support of the level in front of 900 of the graduated cylinder and blocks the support of the level.

 The drill is then ready for drilling which is done by keeping as much as possible the bubble at the center of the level.

Your drill is in a horizontal plane. the stereoscopic vision of the user allows the user to keep the drill perpendicular to the wall, in this horizontal plane.

 - Drilling a hole tilts at an angle o (relative to a perpendicular to a horizontal or vertical surface.

 The device in place on the drill, the user positions the mark of the support of the level in front of cZ or 900 - o (of the graduated cylinder and blocks the support of the level.

 The drill is then ready for drilling. We are brought back to the previous case.

 - Drilling a hole inclined at an angle o <relative to a perpendicular to a surface inclined at an angle p (ge neral case) with respect to the horizontal.

 Before placing the device on the nose of the drill, it applies the reference face thereof on the surface to be drilled, around the center of the future hole.

By rotating the support of the level and the reference face around the point to be pierced, the user positions the bubble at the center of the level. The two reference markers of the reference face are then on the line of greatest slope of the slll- to pierce. The user then materializes this line of greatest slope by drawing, the angle ss is displayed on the graduated cylinder.

 In the case where o (= Oo (the most frequent case) the user then blocks the level support and fixes the device thus adjusted on the nose of the drill, the drilling is done while maintaining the references of the reference surface substantially. in the line of greatest slope and the bubble in the center of the level.

For any one, the user must first make a calculation involving the angle of inclination of the plane read on the device and the angle o (-, depending on the case, it may be p + <or 13 - The user then blocks the level support and fixes the device thus adjusted on the nose of the drill, and is brought back to the previous case.

 The accompanying drawings illustrate the invention of the universal model.

 Figures 3 and 4 show the front and end views of the device.

 With reference to these drawings, the device comprises a fixing ring (I), a reference face (2), a spherical level (3), an articulated mirror (4), a mirror support (5) with an elastic washer (6). ), a mirror locking screw (7) a mirror support tapping (8), a depth stop passage hole (9), a depth stop locking screw (10), a locking handle (II) ), a cylinder graduated in degrees (I2), 2 alignment marks (I3), a level support (14) with mark (15), a locking screw (I6) with spring washer (I7).

 Whatever the model, basic or universal, the levels used must have their markings engraved on the inside in order to limit as much as possible the parallax errors and thus increase the accuracy. The liquid incorporated has a viscosity such that it offers a good compromise between sensitivity and stability.

 During piercing with percussion, the bubble can be offset, or even the formation of several smaller bubbles, and it is sufficient, during the piercing, to stop, momentarily, the effort on several occasions. the drill, which allows to check and correct the position of the drill.

 It is understood that the present invention is not limited to the two embodiments described and shown which constitute only two examples, to which many modifications can be made, without departing from the present invention.

Claims (9)

 I) An angular positioning device, relative to the vertical, for a portable drill for drilling a hole at a given angle, characterized in that it comprises a ring (I) with a reference face (2), 2 fixed bubble levels (a spherical (3) and a cylindrical (3 ') for drilling respectively vertically and horizontally) or I mobile spherical bubble level (for drilling at any given angle), I orientable mirror ( 4) installed opposite the level used, with locking system (5, 6, 7), and a locking handle (II). 2) Device according to claim I characterized in that a ring <i) with reference face (2) and alignment marks (I3) is fixed on the nose of the drill, using a handle blocking (II). 3) Device according to claim I characterized in that a spherical bubble level (3) is fixed on the ba gue (I), with its base perpendicular to the axis of the ring. 4) Device according to claim I characterized in that a cylindrical bubble level (3 ') is fixed on the ring (I), parallel to the axis of the ring.  5) Device according to claims 3 and 4 characterized in that the two fixed levels can be replaced by a spherical bubble level (3) fixed on a support (I4) movable about an axis perpendicular to the axis of the ring (I) 6) Device according to claim 5 characterized in that l & .support level (I4) with mark (I5), locking screw (I6), and spring washer (I7) is lockable in any position. 7) nispositif according to claim 6 characterized in that a cylinder graduated in degrees (I2) is integral with the ring (I), with its axis perpendicular to the axis of this ring. This cylinder serving as angular reference for the re nègre (they) 8) Device according to claims 3, 4 and 5 characterized in that a steerable mirror (4) is positionable in relation to the level used (3 or 3 ') 9) Device according to claim 8 characterized in that the mirror support (5), the spring washer (6), and the locking screw (7) hold the mirror in the chosen position.