GB2227960A

GB2227960A - Drill guide ramp

Info

Publication number: GB2227960A
Application number: GB9000608A
Authority: GB
Inventors: Tony Frederick Newell
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-02-02
Filing date: 1990-01-11
Publication date: 1990-08-15
Anticipated expiration: 2010-01-11
Also published as: GB9000608D0; GB2227960B; GB8902296D0

Abstract

The ramp is for use in boring holes in walls, suitable for the insertion of ceramic plugs used to prevent rising damp. The ramp 10 locates and guides a drill by two parallel rails 12, 14 and has means for adjusting the angle of entry of the boring tool into the wall, comprising adjustable length feet 30, 32. The other ramp end seats on pegs of a backplate. Cross-members 16 permit abutment by a lever to pivot to move a drill forwardly to cut the holes. <IMAGE>

Description

SUPPORT FOR DRILL The present invention relates to a support for a drill. In particular, the present invention relates to a support for a drill used for removing cores from the walls of buildings.

Ceramic plugs having hollow centres are known for insertion into the walls of buildings. They are used to allow any damp in the wall of the building to migrate to the ceramic plug and evaporate therein. Such ceramic plugs are used to prevent rising damp in the walls of buildings.

The ceramic plugs are generally about sixty millimetres in diameter. When inserted it is necessary to insert them such that they are inclined, the inner part of the plug being at a higher level than the outer part of the core. The angle of inclination is generally about 50 or more to the horizontal. The plugs are normally inserted about 150mm from the ground level, or at floor level.

One of the problems of inserting ceramic plugs is that although the holes into which the plugs are to be inserted are generally drilled by a power drill, the positioning and feeding of the drill is done by hand. Thus it is often impossible to obtain a consistent angle of inclination, the 50 angle being about the optimum angle required.

According to the present invention there is provided a drill jig assembly comprising a ramp to receive and locate a drill, and being provided with at least one vertical support at one end and a base support at the other, and having transverse location portions for locating and guiding the drill.

Preferably the vertical support is adjustable such that the angle of inclination can be varied.

It is also preferred that the base support includes a plate providing a substantial surface area for one end of the ramp.

The ramp is preferably constructed of two spaced apart parallel rails interconnected by transverse connecting members. The vertical support may be located at the end portion of the ramp which is to be positioned against a wall to be drilled, or it may be located adjacent the base support.

The base support may be provided with means to locate it with respect to the ramp and the ramp may be formed with holes to locate with pegs provided in the base support. Alternatively the ramp may be provided with pegs to locate in holes in the base support.

A lever may be included which rests against one end of the drill and which connects with the transverse connecting pieces of the ramp. Additional support means may be provided upon which the ramp is mounted, the additional support means being provided with vertically adjustable legs.

The present invention will be further described by way of example only, with reference to the accompanying drawings, in which: Figure 1 shows a general arrangement of the present invention, in perspective; Figure 2 shows a general arrangement of the present invention, in perspective, including the drill in a drilling position; Figure 3 shows a general arrangment of the lever handle of the present invention; Figure 4 shows the base plate used with the ramp, in perspective; Figure 5 shows a detail of the fore end bearer plate.

Referring to Figure 1 the general arrangement of the ramp 10 of the present invention is described. The present invention includes two rails 12 and 14 spaced apart from each other parallel to the longitudinal axis of the ramp. The rails are generally formed of right angled section material which may be of metal such as iron, galvanised iron, stainless steel, or of plastics material.

The rails are interconnected by levering bars 16 generally comprising rectangular bars 18 and rods 20 alternately arranged to provide cross bars. Alternatively rods 20 may be used to provide the cross bars [ without rectangular bars 18 ] . The rails 12 and 14 are connected at one end by a back plate 22 having holes 24 therein adapted to receive pegs from a further base plate 26 as shown in Figure 2 and Figure 4. The pegs 28 provide an interlocking means between the back plate of the ramp 10 and the base plate 26. The base plate 26 provides stability for the ramp and prevents the ramp from "digging into" the ground.

The rails 12 and 14 are formed at their foremost ends with outwardly proecting lugs 34 and 36, and nuts 35 and 37 are welded to those lugs in axial alignment with clearance holes drilled therein. Laterally spaced legs 30 and 32 are screw threaded and pass through the nuts 35 and 37 to provide means whereby the length of the legs and therefore the angle of inclination of the ramp may readily adjusted. Locking nuts 38 are provided on the screwed legs 30 and 32 to ensure the correct angle of inclination is maintained once adjustment is completed. It is preferred that the legs are adjusted so that the angle of the ramp 10 is approximately 50 from the horizontal when measured from the back plate.

Further optional features on the ramp include a dust diverter 40. The back plate 22 of the ramp is preferably constructed of right angled material, again of metal or plastics, which extends upwardly and transversely to the rails.

Turning to Figure 4, a base plate generally of metalic construction such as galvanized iron has two upstanding pegs 28 to locate with the holes 24 in the backplate 22. A further upstand 44 is provided to stop the edge from digging into soft ground via vibration.

Referring to Figure 2, a drill generally designated 46, is provided preferably having sliding bearings 48 mounted in the handle portions. A fore-end bearer plate 50 is provided adjacent the chuck 52 of the drill, extending from which is a core bit 54, which may preferably be an 80mm core bit useful for drilling the necessary holes for the ceramic plugs.

The drill used with the present invention is generally a Kango Wolf 950x, or a Bosch Code 11837 or similar. However the present invention is not limited to the use of any particular drill. The required drills need to be of substantial wattage in order to drill the necessary 80mm or the like, hole to sufficient depth when required.

A lever 56 is provided having a distribution plate 58 and a flattened end 60. The lever is preferably approximately 600mm in length. The distribution plate is designed to fit around the drill handle and the flattened end is designed to engage the cross pieces 18 and 20 of the ramp as is further described in detail below.

Referring to Figure 5 the fore-end bearer plate 50 is shown in more detail. The bearer plate 50 is attached to the handle of the drill above the chuck 52 by means of fixing bolts 54 and vibration proof nuts 56. Two such nuts and bolts are used. The fore-end bearer plate is generally a right-angled piece of metal which extends downwardly between the rails 12 and 14 such that it can slide on the horizontal flat portions of those rails.

The approximate dimensions of the present invention are shown below although these should not be taken as limiting. In general the ramp itself is approximately 930mm long and is approximately 125mm wide. The adjustment to the legs is such that a 50 angle is provided between the back plate and the legs. This means an approximate adjustment of about 130mm from level ground to the periphery of the core bit of the drill.

The transverse connecting pieces or levering bars 16 are preferably in the form of rectangular pieces 18 and rods 20 extending between the rails. These are spaced approximately 50mm apart when taken from the fore-edge of one rectangular piece to the fore-edge of the rod and from the fore-edge of the rod to the fore-edge of the next rectangular bar 18. This provides an interspaced ladder like arrangement in which the alternate spacing between rungs are of varying distances between alternate levering bars 16. Alternatively the distances may be equally spaced.

In operation, the base plate 26 is placed on the ground in front of the area of wall to be drilled. The ramp 10 is placed in position, the peg holes 24 interlocking with the pegs 28 to locate the back plates of the ramp 10 on the base plate and the front of the ramp closely adjacent the wall. The legs 30 and 32 are adjusted to provide a 50 elevation from the horizontal and the lock nuts 28 are tightened to hold the legs in position. The drill 46 is connected with the core bit 54 and placed on the ramp 10 with the fore-end bearer plate 50 positioned between the rails 12 and 14 and resting on the horizontal portion of the rail 14. Sliding bearings 48 support the weight of the drill 46 on the top edge of the vertical portions of the rails 12 and 14.

The lever 56 is positioned such that the distribution plate 58 fits around the handle of the drill and the flattened end is inserted between adjacent levering bars 16. The operator aligns the drill bit by moving the ramp to the desired position such that the bit is against the part of the wall to be drilled. The operator kneels on the base plate 26 with knee pads against the upstand 44.

The lever is placed in position as described. The drill is started and the lever is pushed towards the vertically adjusted legs 30 and 32 such that the drill bites into the wall being drilled with the fore-end bearer plate and the sliding bearings 48 sliding on the ramp. To enable the ceramic cores to be inserted into a wall, it is necessary to drill to a depth of 80mm to 540mm in increments of approximately 75mm although this depth is not limiting and any depth can be drilled using the jig of the present invention. As the drill progresses into the wall by the action of the lever, it may become necessary to re-position the lever such that the flattened end 60 is between levering bars nearer the vertically adjusting legs. Thus the drilling may occur in a step like fashion until the required depth is reached, the lever being re-positioned as necessary. For deeper holes an extension "nose" can be used.

It is sometimes required to insert the ceramic plugs at a height above ground level considerably in excess of that possible with the jig described above. In such cases an additional table is provided [not shown] having a plate on which the jig is placed, and being provided with four legs. The legs are individually adjustable heightwise and the plate is provided with locating pegs similar to the pegs 28 to locate with the holes 24 in the backplate 26.

The individually adjustable legs allow for better location on uneven or sloping ground.

It is sometimes found that if the core bit is a diamond drill, the pressure needed to bore into the masonry is not so great and the lever 56 may be dispensed with, direct manual presure being sufficient to feed the drill forwardly

Claims

CLAINS 1. A drill jig assembly, comprising a ramp to receive and locate a drill, and being provided with at least one vertical support at one end and a base support at the other, and having transverse location portions for locating and guiding the drill.
2. A drill jib assembly according to Claim 1 wherein the vertical support is adjustable such that the angle of inclination can be varied.
3. A drill jig assembly according to Claims 1 or 2 where the base support further includes a plate providing a substantial surface area for one end of the ramp.
4. A drill jig assembly according to any of the previous claims where the ramp is constructed of two spaced apart parallel rails interconnected by transverse connecting members.
5. A drill jig assembly according to Claims 1 and 2 where the vertical support is located at the end portion of the ramp which is to be positioned against a wall to be drilled.
6. A drill jig assembly according to Claims 1 and 2 where a vertical support is located adjacent the base support.
7. A drill jig assembly according to any of the earlier claims, where the base support is provided with means to locate it with respect to the ramp.
8. A drill jig assembly according to claim 7 where the ramp is formed with holes to locate with pegs provided in the base support or the ramp is provided with pegs to locate in holes in the base support.
9. A drill jig assembly according to any of the previous claims where there is included a lever which rests against one end of the drill and which connects with the transverse connecting pieces of the ramp.
10. A drill jig assembly according to any of the previous claims where additional support means are provided upon which the ramp is mounted, the additional support means being provided with verticallly adjustable legs.
11. A drill jig assembly as herein described with reference to the accompanying drawings.