GB2076737A

GB2076737A - Jig saw

Info

Publication number: GB2076737A
Application number: GB8017375A
Authority: GB
Original assignee: HOLLINS FRED
Current assignee: HOLLINS FRED
Priority date: 1980-05-27
Filing date: 1980-05-27
Publication date: 1981-12-09
Also published as: GB2076737B

Abstract

Mounting means for a powered sawing tool, preferably a jig sawing tool, supports the tool 10 in an inverted position so that the sawing element 13 extends upwards. The mounting means includes a plate 16 having an opening 14 through which the sawing element 11 extends and the body of the tool is secured below the plate. The plate provides on its upper side a support surface for the work piece to be sawed. The plate 16 is carried on a support 18 which acts as a support surface and may form the surface of a work table. <IMAGE>

Description

SPECIFICATION Jig saw This invention relates to improvements concerning powered jig saws and in particular to mounting means for mounting a jig sawing tool.

Conventionally powered jig saws are supplied as hand held integral tool units or as jig sawing attachments to hand held drills. In each case the reciprocating jig saw blade is directed downwardly in use to effect a jig sawing operation on a workpiece. Such an arrangement is difficult to operate because the bulky tool is cumbersome to manipulate, particularly for detailed jig sawing work, and the tool tends to obstruct the view of the workpiece.

An object of the invention is to overcome these disadvantages by providing mounting means for the powered jig sawing tool.

According to the invention mounting means for a jig sawing tool comprises a plate arranged to be secured to the jig sawing tool, the plate having an opening through which the reciprocating jig saw blade extends, the plate being located in a mounting member to support the jig sawing tool in an inverted position with the jig saw blade extending upwardly so that the plate and the mounting member provide a support surface for a work piece.

Preferably the mounting member comprises a rectangular board level with the plate to provide said support surface.

The jig sawing tool is conveniently mounted on the plate by screws passing downwardly through the plate into the tool body.

In one arrangement the mounting member is located between support members reciprocally movable towards and away from one another to engage and support the mounting member.

Alternatively the mounting member may be a table top.

Further features of the invention will appear from the following description of embodiments of the invention given by way of example only and with reference to the drawings, in which Fig. 1 is a perspective view showing a jig sawing tool and one form of mounting means before assembly, and Fig. 2 is a perspective view of another form of mounting means.

Referring to the drawings and firstly to Fig. 1 a jig sawing tool 10 is shown schematically and can be of any form of portable powered jig sawing tool. In this case the tool 10 has a handle 1 1, a body 12 housing the motor and drive transmission and a jig saw blade 13 driven to move reciprocably in its longitudinal direction.

Conventionally such jig sawing tools are provided with threaded holes 15 in the body 12 which normally provide means for securing a slotted plate (not shown) to the underside of the tool.

In the present case the tool 10 is shown in the inverted operative position in which the saw blade 13 extends vertically upwardly and the tool is mounted on a rectangular metal plate 16 by two screws (not shown) extending through two holes 17 in the plate 16 into the holes 15 in the body.

The plate 16 has a circular opening 14 through which the blade 13 extends.

The plate 16 is let into a recess formed in a rectangular wooden mounting board 18 having a central rectangular opening 19 and the plate 16 is fixed to the board by screws (not shown) extending through holes 20 and the plate 16.

The upper surface of the plate 1 6 and the board 18 are level with one another when assembled to provide a working surface on which the workpiece to be sawn is located and moved. It will be seen that holes 17 and 20 are countersunk so that the associated screws do not protrude above said surface.

The arrangement of Fig. 1 is convenient for use with a work bench (not shown) having side members movable towards and away from one another to engage and grip the longer sides of the board 18 and support the tool in the inverted position. Such longer sides may be provided with edges to engage in grooves in the side members.

It will be seen that the arrangement provides an effective means for using a jig saw tool in which a workpiece can be supported adjacent the jig saw blade and can be manually manipulated relative to the saw with both hands to effect a wide variety of jig sawing work simply and without danger.

Preferably the jig saw tool has a foot operated stop start control.

In cases where a suitable work bench is not available or where a more permanent arrangement is called for the plate 16 of Fig. 1 can be incoroporated into a work table or other support as shown in Fig. 2. In this arrangement the plate 16 is let into and secured to the top 22 of a table, the table having legs 23. The plate 1 6 and the top surface 22 of the table constitute a support surface for the workpiece and the saw blade 13 protrudes through a hole 14 in the plate 1 6. On removal of the saw blade the table serves as a normal work table.

The arrangement provides for many of the advantages obtained with band saws but without some of the disadvantages associated with such saws, for example, cut outs can be made without having to break and reassemble the saw blade.

1. Mounting means for a powered sawing tool, such as a jig saw, comprising a plate arranged to be secured to the tool body, the plate having an opening through which the sawing element extends, the plate being arranged to be located on a mounting member to support the tool below the plate with the sawing element extending upwardly, the plate providing a support surface for a work piece to be engaged by the sawing element.

2. mounting means according to claim 1 wherein the plate and the mounting member together provide a support surface for the work piece.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Jig saw This invention relates to improvements concerning powered jig saws and in particular to mounting means for mounting a jig sawing tool. Conventionally powered jig saws are supplied as hand held integral tool units or as jig sawing attachments to hand held drills. In each case the reciprocating jig saw blade is directed downwardly in use to effect a jig sawing operation on a workpiece. Such an arrangement is difficult to operate because the bulky tool is cumbersome to manipulate, particularly for detailed jig sawing work, and the tool tends to obstruct the view of the workpiece. An object of the invention is to overcome these disadvantages by providing mounting means for the powered jig sawing tool. According to the invention mounting means for a jig sawing tool comprises a plate arranged to be secured to the jig sawing tool, the plate having an opening through which the reciprocating jig saw blade extends, the plate being located in a mounting member to support the jig sawing tool in an inverted position with the jig saw blade extending upwardly so that the plate and the mounting member provide a support surface for a work piece. Preferably the mounting member comprises a rectangular board level with the plate to provide said support surface. The jig sawing tool is conveniently mounted on the plate by screws passing downwardly through the plate into the tool body. In one arrangement the mounting member is located between support members reciprocally movable towards and away from one another to engage and support the mounting member. Alternatively the mounting member may be a table top. Further features of the invention will appear from the following description of embodiments of the invention given by way of example only and with reference to the drawings, in which Fig. 1 is a perspective view showing a jig sawing tool and one form of mounting means before assembly, and Fig. 2 is a perspective view of another form of mounting means. Referring to the drawings and firstly to Fig. 1 a jig sawing tool 10 is shown schematically and can be of any form of portable powered jig sawing tool. In this case the tool 10 has a handle 1 1, a body 12 housing the motor and drive transmission and a jig saw blade 13 driven to move reciprocably in its longitudinal direction. Conventionally such jig sawing tools are provided with threaded holes 15 in the body 12 which normally provide means for securing a slotted plate (not shown) to the underside of the tool. In the present case the tool 10 is shown in the inverted operative position in which the saw blade 13 extends vertically upwardly and the tool is mounted on a rectangular metal plate 16 by two screws (not shown) extending through two holes 17 in the plate 16 into the holes 15 in the body. The plate 16 has a circular opening 14 through which the blade 13 extends. The plate 16 is let into a recess formed in a rectangular wooden mounting board 18 having a central rectangular opening 19 and the plate 16 is fixed to the board by screws (not shown) extending through holes 20 and the plate 16. The upper surface of the plate 1 6 and the board 18 are level with one another when assembled to provide a working surface on which the workpiece to be sawn is located and moved. It will be seen that holes 17 and 20 are countersunk so that the associated screws do not protrude above said surface. The arrangement of Fig. 1 is convenient for use with a work bench (not shown) having side members movable towards and away from one another to engage and grip the longer sides of the board 18 and support the tool in the inverted position. Such longer sides may be provided with edges to engage in grooves in the side members. It will be seen that the arrangement provides an effective means for using a jig saw tool in which a workpiece can be supported adjacent the jig saw blade and can be manually manipulated relative to the saw with both hands to effect a wide variety of jig sawing work simply and without danger. Preferably the jig saw tool has a foot operated stop start control. In cases where a suitable work bench is not available or where a more permanent arrangement is called for the plate 16 of Fig. 1 can be incoroporated into a work table or other support as shown in Fig. 2. In this arrangement the plate 16 is let into and secured to the top 22 of a table, the table having legs 23. The plate 1 6 and the top surface 22 of the table constitute a support surface for the workpiece and the saw blade 13 protrudes through a hole 14 in the plate 1 6. On removal of the saw blade the table serves as a normal work table. The arrangement provides for many of the advantages obtained with band saws but without some of the disadvantages associated with such saws, for example, cut outs can be made without having to break and reassemble the saw blade. CLAIMS

3. Mounting means according to claim 1 or 2 wherein the mounting member includes a rectangular board having a surface level with a surface of the plate, said surface defining the support surface.

4. Mounting means according to claim 1, 2 or 3 wherein the tool is secured to the plate by screws passing downwardly through the plate into the tool body.

5. Mounting means according to any one of the preceding claims wherein the opening in the plate is shaped to accommodate the sawing element.

6. Mounting means according to any one of the preceding claims wherein the mounting member includes support members movable towards and away from one another to releasably support the plate.

7. Mounting means according to any one of the preceding claims wherein the sawing element is an elongate reciprocally movable jig sawing blade.

8. Mounting means for a powered jig sawing tool substantially as described with reference to the drawings.