GB2360487A

GB2360487A - Routing jig

Info

Publication number: GB2360487A
Application number: GB0031872A
Authority: GB
Inventors: Jeremy Meredew
Original assignee: JANKOVIC BRANIMIR; JANKOVIC CATHERINE EILEEN; JANKOVIC MILJKA; JANKOVIC NADA; JANKOVIC STANIMIR
Current assignee: JANKOVIC BRANIMIR; JANKOVIC CATHERINE EILEEN; JANKOVIC MILJKA; JANKOVIC NADA; JANKOVIC STANIMIR
Priority date: 1999-12-24
Filing date: 2000-12-20
Publication date: 2001-09-26
Anticipated expiration: 2020-12-20
Also published as: GB9930503D0; GB2360487B; GB0031872D0

Abstract

A routing jig 1 particularly for mortising the lock aperture of a wooden door comprises a bar for laying along the door edge, clamping devices 3 at each end 1 of the bar and a slot 2 in the bar for receiving the routers tool. The slot is adjustable in length 4. The jig may have a side plate with apertures for forming the keyhole and spindle hole and may also have apertures 20 for routing hinge recesses. A separate jig may be provided for forming the keyhole and spindle hole.

Description

2360487 ROUTING JIG This invention relates to a jig for facilitating

routing operations on joinery items, more particularly but not exclusively for routing slots and recesses for door furniture, e.g. a mortise lock of a wooden door.

Fitting out a door with door furniture, i.e. locks, handles and hinges, is time consuming if done by hand. Powered hand tools may help. Accuracy is essential in either case, but especially so if power tools are used.

According to one aspect of the invention, there is provided a jig for defining a position relative to a joinery item on which a power routing operation is to be carried out, the jig comprising:

an aperture defining member for being applied to the item and having portions defining an aperture through which the item is exposed for a cutting tool of a power driven router to be applied; clamping means connected to the aperture defining member and operable for clamping the item to fix the aperture defining member thereto; and an adjustment member coupled to the aperture defining member for movement relative to the aperture defining member to adjust the size of the aperture.

Advantageously, said aperture is elongate and the adjustment member is linearly movable to adjust the length of the aperture.

2 The aperture defining member may be elongate and the clamp means may comprise two vice clamps, one near each end of the aperture defining member. Preferably, each such vice clamp comprises two jaws and a screw having oppositely handed screw threads engaged with correspondingly threaded holes in respective ones of the jaws so that turning of the screw in one or the other direction draws the jaws together or moves them apart with a self-centring action.

The jig may be adapted for enabling a slot to be routed into the edge of a wooden door to receive a mortise lock.

The aperture defining member may comprise at least one opening for exposing a portion of the edge of said door near the side of the door for a hinge receiving recess to be machined at this portion. Ideally, there is then a slidable plate which is fitted to the aperture defining member for being moved to adjust the size of said opening.

The jig may be used with a template member which is generally E-shaped in crosssection and of which the central limb is operable for being fitted into a mortise lock receiving slot in the edge of a door and of which the outer limbs comprise apertures for defining positions for the keyhole and/or handle spigot(s) of a mortise lock to be fitted in said slot. Preferably, said outer limbs each comprise two or more apertures for defining the keyhole and/ or handle spigots of respective different standard mortise lock sizes.

Alternatively, the jig may comprise a side plate affixed to one side of the aperture defining member for the side plate to lie adjacent the side of said door, the side 3 plate comprising aperture means for defining positions for the keyhole and/or handle spigots of a mortise lock to be fitted in said slot. Preferably, the aperture means comprises two or more apertures for the keyhole and/or handle spigot of respective different standard mortise lock sizes.

According to another aspect of the invention, there is provided a method for carrying out a routing operation on an item of joinery, the method comprising:

attaching to the item a jig according to any preceding claim; moving said adjustment member to adjust the size of the aperture; and applying the cutting tool of a power-driven router to said item via said aperture.

For a better understanding of the invention, and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:

Figures 1, 2 and 3 are respectively a plan view, a front view and an end view of a routing jig; Figure 4 is a top view of an adjustment plate forming part of the jig of fixtures 1 to 2; Figure 5 is a perspective view of a collar; 4 Figures 6 and 7 are a perspective view and a section on the line 7-7 in Figure 6 of a keyhole/handle marking out template.

Figure 8 is a front view of part of a routing jig with a side plate to act as a keyhole template; and Figures 9 to 11 are a plan view, elevation and end view respectively of another jig.

The jig shown in Figures 1 to 3, is operable for defining a position relative to a joinery item, namely a door 16 in this case, on which a power routing operation is to be carried out. The jig comprises an aperture defining member in the form of an elongate bar 1 for being applied to the door 16 and having portions defining slot 2 through which the door 16 is exposed for a cutting tool of a power driven router (not shown) to be applied. The jig also comprises clamping means 3 connected to the bar 1 and operable for clamping the door 16 to fix the bar to the door and a slide gate 4 coupled to the bar 1 for movement relative to the bar 1 to adjust the length of the slot 2.

The slide gate 4 is relatively thin compared to bar 1. It is narrower than the bar but a little wider than the slot 2. It lies within a shallow recess 12 milled in the top surface of the bar 1. It has a slot 5 along its length. The slot overlies threaded holes 6 in the bar 1 and the slide gate 4 can be fixed in place relative to the bar 1 by screws 7 extending through the slot 5 and engaged with the holes 6. With the screws 7 loosened, the gate 4 can be slid along to adjust the length of the slot 2. The recess 12 extends along each side of slot 2, from about the middle of the slot 2 to one end thereof and then on past the end of slot 2 through a distance equal to the length of the slide gate 4. As a result, gate 4 can be slid between one extreme position in which it leaves the slot 2 completely free and an opposite position in which about half the length of the slot 2 is covered.

The clamp means 3 comprises two vice clamps, one near each end of the bar 1. Each vice clamp comprises two jaws 8 and a screw 9 having a central portion supported for rotation but fixed against axial movement in a bearing block 13 and oppositely handed screw threads at its ends engaged with correspondingly threaded holes in respective ones of the jaws so that turning of the screw in one or the other direction draws the jaws together or moves them apart with a selfcentring action. The bearing blocks 13 are fixed by screws 14 to respective narrower end portions of the bar 1.

The collar 10 shown in Figure 4 is a fitment normally provided with the routers. The collar is fitted onto the router around its cutting tool (not shown), The router with the collar and cutting tool in place, can be moved linearly along the slot 2 so that the cutting tool forms a slot in the door 16 beneath the slot 2. The normal function of the collar is to space the cutting tool of the router from an adjacent abutment. In this case the abutment is the side of the slot 2 so as to define the position of the slot in the door relative to the side of the slot 2. Thus, if the collar has a 30 mm diameter and the cutting tool a 10 mm diameter, then the side of the slot in the door 16 will be spaced 10 mm from the side of the slot 2.

6 Provided with the router there is at least one further collar (not shown). The collars have the different external diameters and one is selected and fitted to the router 2.

The particular jig shown is adapted for enabling a slot 15 to be routed into the edge of a wooden door 16 to receive a mortise lock (not shown). In this case therefore, there is chosen a collar adapted for routing the relatively deep narrow slot 17 for the body of a mortise lock and a further collar which is chosen for receiving a cutting tool for routing a shallow broader slot 18 for the lock fascia plate (not shown).

As shown in Figures 1 and 3, the bar 1 may comprise at least one opening 20 for exposing a portion of the edge of the door 16 near the side of the door for a hinge receiving recess 21 to be machined at this portion. A slidable plate 22 is fitted to the bar 1 (by screws 23 engaged through a slot 24) next to the opening 20 for being moved to adjust the size of the opening 20.

Having formed the lock slot and hinge recesses it is necessary to form the keyhole 30 and a hole 31 for the handle spigot. To help with this, there can be used a sheet metal template member 32 which is generally E- shaped in cross-section and of which the central limb 33 is formed by two spaced side by side portions 38 of the sheet metal and is operable for being fitted into a mortise lock receiving slot 34 in the edge of a door 35 and of which the outer limbs 36 comprise apertures 37 for defining positions for the keyhole and/or handle spigot(s). The outer limbs 36 each comprise two or more apertures for defining the keyhole and/or handle spigots of respective different standard mortise lock sizes.

7 Alternatively, the jig may comprise a side plate 40 affixed to one side of the bar 1 for the side plate 40 to lie adjacent the side of a door 41, the side plate comprising apertures 42 for defining positions for the keyhole and/or handle spigots. There are two or more apertures to accommodate the keyhole and/or handle spigot of respective different standard mortise lock sizes.

In another embodiment of the jig shown in Figures 9 to 11, the jig comprises a bar 53 with a slot 2 therein and self-centring vice clamps 90 at the ends of the bar as before. As before, the central slot 2 is operable for guiding a router to machine a mortise lock slot in the edge of a door. Here however, there are two sliding adjustment gates 59 at respective ends of the slot 2. Each gate 59 slides within a shallow recess 91 containing the slot 2 and extending past it at each end so that the gates 59 can be slid within the recess 91 between end positions leaving the slot 2 fully open, and inward positions leaving the slot 2 much shorter. Each gate 59 has an elongate slot 92 with a shallow peripheral recess 93. Each gate is fixed to the bar 59 by two button-head screws 94 with the heads of the screws engaged in the recess 93 to permit the sliding movement of the gate.

A hinge aperture (not shown) like the aperture 20 of Figure 1 can be provided one at each end of the recess 91 and at least partly overlapping the recess 91 whereby the lengths of the hinge apertures can be adjusted by moving the respective gates 59. Alternatively, the hinge apertures could be spaced from the respective ends of the recess and rendered adjustable in length by respective separate adjustment members (not shown in Figures 9 to 11) similar to the members 22 in Figure 1.

8 Each clamping device comprises a metal block 58 fixed by screws 69 to the top of an end portion 95 of the bar 53, which end portion is narrower than the rest of the bar. Two adjustment blocks 56 and 57 are positioned each side of the block 58 and are connected thereto by a screwed rod having oppositely handed threaded portions at each end. These threaded portions are engaged with threaded holes in respective ones of the blocks 56 and 57 so that turning the screwed rod moves the blocks 56 and 57 either towards each other or away from each other. For lightness, the blocks 56, 57 and 58 are, like the bar 53, made of aluminium alloy and so, to give wear resistance, the threaded holes in the blocks 56 and 57 are provided with inserts of harder material for example they can be provided with helical spring inserts (such as Helicoils). Between the block 58 and each block 56 or 57, there is provided a respective adjusting collar 61 fixed to the screwed rod by a roll pin 96 engaged in a hole extending diametrically through the collar and the screwed rod.

The screwed rod 60 has a diametrical through hole at each end to slidably receive a lever pin (not shown) for assisting in turning the rod 60.

At one and the other side of the bar 53, there is a side plate 51 and 52 respectively extending between the blocks 56 and 57 of the two clamping devices. The plates 51 and 52 are fixed to the blocks 56and 57 by screws 98. Each side plate is partly triangular as shown and there is a central aperture 97 extending through it. Fixed over each aperture is a plate 54 with holes 99 adapted for forming a jig for machining out the keyhole and handle spigot of the door to be fitted out, the plates 54 being fixed to the side plates 51 and 52 by screws 100.

9 When engaged over the long edge of a door, the screw-threaded rods 60 can be turned to clamp the door between the blocks 56 and 57 via the side plates 54.

As with the blocks 56 to 58, the screw holes in the parts of the jig can be reinforced by Helicoil inserts (not shown).

Claims

1. A jig for defining a position relative to a joinery item on which a power routing operation is to be carried out, the jig comprising:

0 an aperture defining member for being applied to the item and having portions defining an aperture through which the item is exposed for a cutting tool of a power driven router to be applied; 0 clamping means connected to the aperture defining member and operable for clamping the item to fix the aperture defining member thereto; and 0 an adjustment member coupled to the aperture defining member for movement relative to the aperture defining member to adjust the size of the aperture.

2. A jig according to Claim 1, wherein said aperture is elongate and the adjustment member is linearly movable to adjust the length of the aperture.

3. A jig according to Claim 1 or 2, wherein said aperture is elongate and the jig comprises two adjustment members, one near each end of the aperture.

4. A jig according to Claim 3, wherein each vice clamp comprises two jaws and a screw having oppositely handed screw threads engaged with correspondingly threaded holes in respective ones of the jaws so that turning of the screw in one or the other direction draws the jaws together or moves them apart with a self-centring action.

5. A jig according to any preceding claim, wherein the jig is adapted for enabling a slot to be routed into the edge of a wooden door to receive a mortise lock.

6. A jig according to Claim 5, wherein the aperture defining member comprises at least one opening for exposing a portion of the edge of said door near the side of the door for a hinge receiving recess to be machined at this portion.

7. A jig according to Claim 9, including a slidable plate fitted to the aperture defining member for being moved to adjust the size of said opening.

8. A jig according to Claim 7, wherein said adjustment member is movable to adjust the size of the aperture and also movable to adjust the size of said opening.

9. A jig according to Claim 5, 6, 7 or 8 and a template member which is generally E-shaped in cross-section and of which the central limb is operable for being fitted into a mortise lock receiving slot in the edge of a door and of which the outer limbs comprise apertures for defining positions for the keyhole and/or handle spigot(s) of a mortise lock to be fitted in said slot.

10. A jig according to Claim 11, wherein said outer limbs each comprise two or more apertures for defining the keyhole and/or handle spigots of respective different standard mortise lock sizes.

11. A jig according to Claim 7, 8, 9 or 10, including a side plate affixed to one side of the aperture defining member for the side plate to lie adjacent the side of said door, the side plate comprising aperture means for defining positions for the keyhole and/or handle spigots of a mortise lock to be fitted in said slot.

12. A jig according to Claim 11, wherein the aperture means comprises two or more apertures for the keyhole and/or handle spigot of respective different standard mortise lock sizes.

13. A method for carrying out a routine operation on an item of joinery, the method comprising:

0 attaching to the item a jig according to any preceding claim; 0 moving said adjustment member to adjust the size of the aperture; and 0 applying the cutting tool of a power-driven router to said item via said aperture.

14. A template for enabling the keyhole and/or handle spigot of mortise lock to be marked out and/or machined in a door, the template comprising a sheet metal member which is generally E-shaped in cross-section and of which the central limb is suitable for being fitted into the mortise lock slot in the edge of a door and of which the outer limbs lie each side of the door and comprise apertures for defining positions for the keyhole and/or handle spigot(s) of the mortise lock.

15. A jig template or routing method substantially as hereinbefore described with reference to the accompanying drawings.