US-12623370-B2 - Mortising jig

US12623370B2US 12623370 B2US12623370 B2US 12623370B2US-12623370-B2

Abstract

A mortising jig and associated components and methods for cutting a mortise in a workpiece. The jig includes a guide assembly for locating and moving a drill bit of a drilling tool relative to the workpiece. The guide assembly includes a guide rail and a guide. The guide includes a guide carriage movably mounted on the guide rail for movement along the guide rail and a drill bit support. The drill bit support is movable with the guide carriage. The drill bit support includes a rest arranged to locate the drill bit of the drilling tool relative to the workpiece. The drill bit support is movable relative to the guide carriage to change a distance between the rest and the guide carriage.

Inventors

Darrin E. Smith

Assignees

JESSEM TOOL CORPORATION

Dates

Publication Date: 20260512
Application Date: 20230214

Claims (17)

1 . A jig for cutting a mortise in a workpiece using a drilling tool having a drill bit, the jig comprising: a guide assembly configured to locate and move the drill bit of the drilling tool relative to the workpiece, the guide assembly comprising: a guide rail; and a guide comprising: a guide carriage movably mounted on the guide rail for movement along the guide rail; a drill bit support arranged to be movable with the guide carriage, the drill bit support including a rest arranged to locate the drill bit of the drilling tool relative to the workpiece, the drill bit support being movable relative to the guide carriage to change a distance between the rest and the guide carriage, the movement of the drill bit support relative to the guide carriage to change the distance between the rest and the guide carriage being actuated by movement of the guide carriage on the guide rail; an indexer arranged to control the movement of the drill bit support relative to the guide carriage; wherein the guide carriage is supported by the guide rail for linear reciprocating motion with respect to the guide rail, the linear reciprocating motion including a series of strokes in alternating directions, wherein the indexer is configured to permit the movement of the drill bit support relative to the guide carriage when the guide carriage is generally at the end of each stroke and is configured to inhibit the movement of the drill bit support relative to the guide carriage during each stroke prior to the guide carriage being generally at the end of each stroke, and wherein the guide assembly comprises a pivotable lever operatively connected to the guide carriage such that rocking motion of the lever produces the linear reciprocating motion of the guide carriage on the guide rail.
2 . The jig of claim 1 , wherein the indexer is configured to control the movement of the drill bit support relative to the guide carriage to change the distance between the rest and guide carriage by discrete increments.
3 . The jig of claim 2 , wherein the indexer is configured to control the movement of the drill bit support toward the guide carriage to decrease the distance between the rest and guide carriage by the discrete increments.
4 . A jig for cutting a mortise in a workpiece using a drilling tool having a drill bit, the jig comprising: a guide assembly configured to locate and move the drill bit of the drilling tool relative to the workpiece, the guide assembly comprising: a guide rail; and a guide comprising: a guide carriage movably mounted on the guide rail for movement along the guide rail; a drill bit support arranged to be movable with the guide carriage, the drill bit support including a rest arranged to locate the drill bit of the drilling tool relative to the workpiece, the drill bit support being movable relative to the guide carriage to change a distance between the rest and the guide carriage, the movement of the drill bit support relative to the guide carriage to change the distance between the rest and the guide carriage being actuated by movement of the guide carriage on the guide rail; an indexer arranged to control the movement of the drill bit support relative to the guide carriage; wherein the guide carriage is supported by the guide rail for linear reciprocating motion with respect to the guide rail, the linear reciprocating motion including a series of strokes in alternating directions, wherein the indexer is configured to permit the movement of the drill bit support relative to the guide carriage when the guide carriage is generally at the end of each stroke and is configured to inhibit the movement of the drill bit support relative to the guide carriage during each stroke prior to the guide carriage being generally at the end of each stroke, and wherein the guide assembly includes a guide support supporting the guide rail, and wherein the indexer includes a first engagement surface and a second engagement surface, the first engagement surface arranged to engage the guide support to actuate the indexer to permit the movement of the drill bit support relative to the guide carriage when the guide carriage is generally at the end of each stroke in a first direction of the alternating directions, and the second engagement surface arranged to engage the guide support to actuate the indexer to permit the movement of the drill bit support relative to the guide carriage when the guide carriage is generally at the end of each stroke in a second direction of the alternating directions.
5 . A jig for cutting a mortise in a workpiece using a drilling tool having a drill bit, the jig comprising: a guide assembly configured to locate and move the drill bit of the drilling tool relative to the workpiece, the guide assembly comprising: a guide rail; and a guide comprising: a guide carriage movably mounted on the guide rail for movement along the guide rail; a drill bit support arranged to be movable with the guide carriage, the drill bit support including a rest arranged to locate the drill bit of the drilling tool relative to the workpiece, the drill bit support being movable relative to the guide carriage to change a distance between the rest and the guide carriage; and an indexer arranged to control the movement of the drill bit support relative to the guide carriage, the indexer comprising a first indexing member and a second indexing member, the first and second indexing members each being moveable between a first position and a second position independent of the other indexing member, wherein the first and second indexing members are each arranged to permit the movement of the drill bit support relative to the guide carriage in the first position, wherein the first and second indexing members are each arranged to inhibit the movement of the drill bit support relative to the guide carriage in the second position.
6 . The jig of claim 5 , wherein the first and second indexing members are each arranged to alternate between the first and second positions.
7 . The jig of claim 6 , wherein the first and second indexing members are arranged to alternate, with respect to each other, between the first and second positions such that, in operation to form the mortise, the first indexing member is disposed in the first position when the second indexing member is disposed in the second position and the second indexing member is disposed in the first position when the first indexing member is disposed in the second position.
8 . The jig of claim 5 , wherein the first and second indexing members each include a stop, the stop of the first indexing member arranged to engage and inhibit the movement of the drill bit support relative to the guide carriage when the first indexing member is in the second position, and the stop of the second indexing member arranged to engage and inhibit the movement of the drill bit support relative to the guide carriage when the second indexing member is in the second position.
9 . The jig of claim 8 , wherein the drill bit support includes a first indexing guide, the stop of the first indexing member arranged to engage the first indexing guide when the first indexing member is in the second position to inhibit the movement of the drill bit support relative to the guide carriage, the stop of the first indexing member arranged to not block the first indexing guide when the first indexing member is in the first position to permit the movement of the drill bit support relative to the guide carriage.
10 . The jig of claim 9 , wherein the first indexing guide includes a plurality of flanges spaced apart along a longitudinal axis of the first indexing guide, the stop of the first indexing member arranged to engage a first flange of the plurality of flanges when the first indexing member is in the second position, the stop of the first indexing member arranged to not block the first flange when the first indexing member is in the first position.
11 . The jig of claim 10 , wherein the stop of the second indexing member is arranged to engage the first flange of the plurality of flanges when the second indexing member is in the second position to inhibit the movement of the drill bit support relative to the guide carriage, the stop of the second indexing member arranged to not block the first flange when the second indexing member is in the first position to permit the movement of the drill bit support relative to the guide carriage.
12 . A jig for cutting a mortise in a workpiece using a drilling tool having a drill bit, the jig comprising: a base defining a cutting window arranged to view the workpiece; and a guide assembly supported by the base, the guide assembly configured to locate and move the drill bit of the drilling tool relative to the workpiece, the guide assembly comprising: a guide rail; and a guide carriage movably mounted on the guide rail for movement along the guide rail, the guide carriage having a drill bit opening sized and shaped to receive the drill bit of the drilling tool, the drill bit opening having a longitudinal axis that is coextensive with an axis of rotation about which the drill bit rotates when the drill bit is received in the drill bit opening; wherein the guide assembly is movable relative to the base between a cutting position and a setup position, the longitudinal axis of the drill bit opening being aligned with the cutting window of the base when the guide assembly is in the cutting position, the longitudinal axis of the drill bit opening being spaced apart from the cutting window of the base when the guide assembly is in the setup position.
13 . The jig of claim 12 , wherein the guide assembly overlies and generally inhibits an operator from viewing the cutting window when the guide assembly is in the cutting position, and wherein the guide assembly permits the operator to view the cutting window when the guide assembly is in the setup position.
14 . The jig of claim 13 , wherein the base includes indicia arranged relative to the cutting window to visually indicate the general location where the mortise will be cut.
15 . The jig of claim 14 , wherein the indicia includes centering indicia arranged to visually indicate a center of the mortise and end indicia arranged to visually indicate first and second ends of the mortise.
16 . The jig of claim 12 , further comprising a retainer configured to releasably secure the guide assembly in the cutting position.
17 . The jig of claim 12 , further comprising a vacuum port defining an outlet, the outlet in fluid communication with the cutting window.

Description

FIELD The present invention generally relates to cutting jigs and more particularly to jigs for cutting mortises in workpieces. BACKGROUND A mortise and tenon joint is a well-known connection used to connect two workpieces or members, frequently wooden members, together. The joint comprises two parts, one for each member of the connection: (1) a hole (such as a blind hole) in a first member and (2) a tenon in a second member sized and shaped to be inserted into the hole of the first member. The joint may be further secured with an adhesive (e.g., glue). SUMMARY In one aspect, a jig for cutting a mortise in a workpiece using a drilling tool having a drill bit comprises a guide assembly configured to locate and move the drill bit of the drilling tool relative to the workpiece. The guide assembly comprises a guide rail and a guide. The guide comprises a guide carriage movably mounted on the guide rail for movement along the guide rail and a drill bit support arranged to be movable with the guide carriage. The drill bit support includes a rest arranged to locate the drill bit of the drilling tool relative to the workpiece. The drill bit support is movable relative to the guide carriage to change a distance between the rest and the guide carriage. In another aspect, a jig for cutting a mortise in a workpiece using a drilling tool having a drill bit comprises a base defining a cutting window arranged to view the workpiece. A guide assembly is supported by the base. The guide assembly is configured to locate and move the drill bit of the drilling tool relative to the workpiece. The guide assembly comprises a guide rail and a guide carriage movably mounted on the guide rail for movement along the guide rail. The guide carriage has a drill bit opening sized and shaped to receive the drill bit of the drilling tool. The drill bit opening has a longitudinal axis that is coextensive with an axis of rotation about which the drill bit rotates when the drill bit is received in the drill bit opening. The guide assembly is movable relative to the base between a cutting position and a setup position. The longitudinal axis of the drill bit opening is aligned with or intersects the cutting window of the base when the guide assembly is in the cutting position. The longitudinal axis of the drill bit opening is spaced apart from the cutting window of the base when the guide assembly is in the setup position. Other objects and features will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front perspective of a mortising assembly according to one embodiment of the present disclosure being used to form a mortise in a workpiece; FIG. 2 is a back perspective a mortising jig and a drilling tool of the mortising assembly and a fragmentary portion of the workpiece; FIG. 3 is a right side perspective of the mortising jig, with a guide assembly thereof in a cutting position; FIG. 4 is a rear perspective of the mortising jig, with a guide thereof removed; FIG. 5 is a front perspective of the guide; FIG. 6 is a rear perspective of the guide; FIG. 7 is a perspective of a drill bit support of the guide; FIG. 8 is a vertical section of the drill bit support; FIG. 9A is a front perspective of the guide with portions thereof removed to reveal interior details and with an indexer in its retaining position; FIG. 9B is similar to FIG. 9A, except the indexer is in its release position FIG. 10 is a perspective of a guide block of the guide; FIG. 11 is a front perspective of the indexer, with first and second indexing members in their respective retaining positions; FIG. 12 is an exploded perspective of the first and second indexing members; FIG. 13A is a front perspective of the indexer, with the first indexing member in its release position and the second indexing member in its retaining position; FIG. 13B is a front perspective of the indexer, with the first indexing member in its retaining position and the second indexing member in its release position; FIG. 14A-D illustrate the beginning of the cutting cycle. FIG. 14A is an enlarged cross-section of the mortising jig, with the guide in a starting position. FIG. 14B is similar to FIG. 14A, with the guide moved to the left and a drill bit lowered one step. FIG. 14C is similar to FIG. 14B, with the guide moved to the right and the drill bit lowered another step. FIG. 14D is similar to FIG. 14C, with the guide moved back to the left and the drill bit lowered another step; FIG. 15 is a bottom perspective of a guide base; FIG. 16 is a top perspective of a base; FIG. 17 is a bottom perspective of a base plate; FIG. 18 is a perspective of a mounting plate; FIG. 19 is a perspective of the mortising jig, with a guide assembly thereof in a setup position; FIG. 20 is a top view of the mortising jig, with a guide assembly thereof in the setup position; FIG. 21A is a vertical section of the mortising jig, with a guide assembly thereof in the cutting position