DE7920272U1 - ADJUSTMENT DEVICE AT HAND DRILLING MACHINES - Google Patents

Description

BIBRACH & REHBERO

LAW FIRM

PATENT Attorney DIPL-INQ. RUDOLF BIBRACH BIBRACH »REHBERG, POSTFACH 738, D-JWO QOTTINOEN ^W PATENT Attorney DIPL-ING. ELMAR REHBERQ

LAWYER MICHAELA BIBRACH-BRANDIS

TELEPHONE: 10551) 57823/41248

POSI CHECK ACCOUNT: HANNOVER 115743-301 BANK ACCOUNTS: DEUTSCHE BANK AG GOTTINGEN

(BLZ Z607007Z) NO. Ot / 85900 COMMERZBANK GÖTTINQEN (BLZ £ 00400301 NO.642572Z

YOUR SIGN YOUR LETTER FROM OUR SIGN D-3400 QÖT71NQEN, YOUR REF. YOUR LETTER OUR REF. POTTERWEG «

10.344 / n5 07/12/1979

Günter Meywald, Rosenweg 5, 3548 Arolsen

Alignment device attachable to hand drills

The invention relates to a straightening device that can be attached to hand drills, with one on the neck of the drill attachable and there fixable housing.

Such straightening devices are known. They usually have a handle provided on the housing that is at right angles is formed protruding from the axis of the hand drill, so that it can be used by the user of the drill gripped with the second hand and aligned the drill in this way additionally or better guided can be held during the drilling process. The housing of the handle includes the neck of the drill and is mostly slotted, with the required hold and tight fit by tightening a clamping screw the neck of the drill is accessible.

Although the known straightening device allows better alignment of the drill perpendicular to the wall or ceiling in which a hole is to be drilled, the right-angled drilling depends to a large extent on the skill and experience of the operator of the drill. In general, a hand drill can be aligned relatively well to the vertical plane with a trained eye, because the human being can judge vertical lines and planes better than horizontal lines and planes as a result of his horizontally oriented eye position. When drilling, the horizontal plane is usually adhered to by feeling, but this leads to considerable angular deviations, so that the borehole sits at an angle in the surface to be drilled. The dowel used in the borehole will then necessarily be anchored in an inclined position so that it is only effective with part of its holding force. A screwed-in screw has only limited hold in such a dowel.

The invention is based on the object of developing a straightening device of the type described at the outset in such a way that it enables the right angles to be formed more precisely than before when drilling.

According to the invention this is achieved in that the housing for horizontal alignment with a barrel vial and for vertical alignment with a circular vial is provided and at least in the areas having the dragonflies made of transparent or translucent Made of plastic. The invention thus creates a display device in which the second level at horizontal drilling, namely the horizontal plane, is indicated with the help of the barrel vial. The alignment

the drilling machine in the vertical plane in the horizontal plane Drilling is done as before. When drilling vertically, however, the circular vial is used, so that alone so that an exact right-angled alignment is possible. The housing is made of transparent or translucent Plastic so that the two vials are visible in all drilling positions.

The vials are aligned with the housing and cannot be moved provided for this. The dragonflies can be incorporated into the material of the housing. With special Advantageously, the circular vial is designed to be readable on both sides, so that it can be used for vertical drilling upwards and upwards can also be read downwards. It is also possible to close the barrel vial and the circular vial to unite a combination level.

A preferred embodiment of the invention is shown in the drawings and will be further described below described. Show it:

Fig. 1 is a view of the straightening device and

Fig. 2 the straightening device, placed on the neck of a hand drill.

The housing 1 of the straightening device is preferably whole made of transparent or translucent plastic. It is essentially annular, so that it can be attached to the neck 2 of a drill 3. After attaching the locking screw 4 is tightened, so that the straightening device receives a firm, immovable seat.

The two are aligned with the axis 5 of the hand drill 3 or with the opening 6 of the housing 1 Level 7 and 8 arranged, the level 7 being a barrel level for the horizontal alignment of the Drilling machine 3 and with the vial 8 around a circular vial for vertical alignment of the axis 5 of the drilling machine acts. Such vials are known per se / but not on alignment devices for hand drills and also not in the koijibination. When drilling horizontally the level 7 application, while the vertical drilling up or down is carried out with the help of the level 8 will. The dragonflies 7 and 8 can be housed in housing-like extensions and protected from all sides be visible so that they can be used for alignment purposes in a wide variety of drilling positions.

Claims (4)

Protection claims: 1. Alignment device that can be attached to hand drills, with a device that can be slipped onto the neck of the drill and fixed there Housing, characterized in that the housing (1) for the purpose of horizontal alignment with a barrel vial (7) and for vertical alignment with a circular vial (8) is provided and at least in which the dragonflies (7, 8) areas of transparent or translucent ^ 'consists of plastic. 2. straightening device according to claim 1, characterized in that the vials (7, 8) aligned with the housing (1) and irreversible are provided for this. 3. Alignment device according to claim 1 and 2, characterized in that the circular vial (8) is designed to be readable on both sides. 4. straightening device according to claim 1 to 3, characterized in that the barrel vial (7) and the circular vial (8) to one Combination bubble are united.