US3071988A - Electric drill and power tool support - Google Patents

Description

Jan. 8, 1963 H. T. GIBSON 3,071,988

ELECTRIC DRILL AND POWER TOOL SUPPORT Filed March 15, 1960 3 Sheets-Sheet 1 7157.1

I I l i I i I I l 5-":

k H]. Gfsso/v INVENTOR BY v I 1 ATTORNEYS Jan. 8, 1963 H. "r. GIBSON ELECTRIC DRILL AND POWER TOOL SUPPORT 3 Sheets-Sheet 2 Filed March 15, 1960 IN VENTOR ATTORNEYS.

3 Sheets-Sheet 3 H. T. GIBSON ELECTRIC DRILL AND POWER TOOL SUPPORT INVENTOR ATTORNEYS a I BY /1 1 "T 5;

3,071,988 ELECTRIC DRILL AND POWER TOQL SUPPQRT Henry T. Gibson, 139 N. Tahquitz, Hornet, Calif. Filed Mar. 15, 1960, Ser. No. 15,225 Claims. (Cl. 77-6) This invention relates to a power tool support, and more particularly to a power drill support which will permit the drill to be controlled during the boring operation, and thereby insure the true boring of the metal by preventing lateral movement of the drill as the drill passes through the metal, in completing the boring operation.

Another object of the invention is to provide a support which will gradually feed the tool to its work, and prevent lateral sway of the bit as the bit passes through the metal, thereby preventing breakage of the bit at its point, which often results in injury to the operator.

Still another object of the invention is to provide a clamping member for clamping the work at a point below the drill, the clamping member being so constructed and arranged that the elements for operating the clamping member will be positioned exteriorly of the support so that they will be out of the way and will not in any way restrict the operation of the stand.

Still another object of the invention is to provide a stand of this character which may be light in construction and readily transported to the work, eliminating the necessity of transporting heavy metal objects to the drill stand for completing the drilling operation.

Still other objects reside in the combinations of elements, arrangements of parts, and features of construction, all as will be more fully pointed out hereinafter and disclosed in the accompanying drawings wherein there is shown a preferred embodiment of this inventive concept.

Referring to the drawings:

FIGURE 1 is a side elevational view of a combined drill holder and support, constructed in accordance with the invention.

FIGURE 2 is a vertical sectional view taken on line 22 of FIGURE 1.

FIGURE 3 is a vertical sectional view taken on line 3-3 of FIGURE 2.

FIGURE 4 is a transverse sectional view taken on line 4-4 of FIGURE 1.

FIGURE 5 is a sectional view taken on line 5-5 of FIGURE 1, the work having been removed.

FIGURE 6 is a sectional view taken on line 6-6 of FIGURE 1.

FIGURE 7 is a fragmental end elevational view of the Work clamp supporting bars.

FIGURE 8 is a sectional view taken on line 8-8 of FIGURE 1.

FIGURE 9 is a sectional view taken on line 9-9 of FIGURE 5.

FIGURE 10 is an end elevational view of a supporting block for mounting and levelling the holder.

Referring to the drawings in detail, the power tool support embodies a frame including base bars 5 to which the lower ends of the standards 6 are bolted, by means of bolts 7 which are supplied with nuts 8 that secure the bolts in position and provide a rigid support for the frame.

As better shown by FIGURE 2 of the drawings, the inner surfaces of the standards 6, are formed with grooves 9, which extend throughout the lengths of the standards,

and provide guides for the guide plates 10 that are shown as movable along same.

The inner confronting faces of the guide plates 10, which are arranged on opposite sides of the frame, are provided with notches in which the transverse positioning bars 11 are secured. The ends of the bars 11 extend substantial distances beyond the sides of the guide plates it), where they provide supports for the threaded rods 12, which have their ends disposed in holes in the transverse supporting bars 11. The ends of the threaded rods 12 are held in position by means of the nuts 13 that are positioned to securely grip the outer surfaces of the transverse supporting bars 11, as clearly shown by FIGURE 4 of the drawings.

These threaded rods 12 provide supports for the jaws 14 of the motor supporting clamp, and between which the motor, which in the present showing is indicated by the reference character A, is securely clamped, there being provided nuts 15 on the threaded rods 12 for moving the jaws 14 into clamping relation with the motor housing to securely mountthe motor for operation. The motor of course is a part of the power drill, and supports the drill bit 16, which is mounted in the conventional drill chuck, also a part of the motor drill.

Connected between the upper ends of the standards 6, there is a supporting rod 17 which is provided with threaded ends that pass through openings 13 formed adj acent to the upper ends of the standards 6 as better shown by FIGURE 3 of the drawings.

Nuts 19 are provided on the threaded ends of the supporting rods 17, and are moved into close contact with the standards 6, securely holding the supporting rod against movement with respect to the standards 6.

This supporting rod provides a support for the guide bars 1ft, which form a part of the motor supporting carriage.

A supporting bar 20 formed with a central hole has its ends notched to accommodate the confronting faces of the guide bars 10, where the ends are secured to the guide bars 10 and thus forms an important element of the vertically movable carriage. The central hole in the bar 20 receives the cylindrical extension on the housing of the electric motor, which extension encloses the tool receiving chuck.

As shown by FIGURE 1 of the drawings, vertical contractile springs 21 have their upper ends mounted on the rods 17, and these upper ends of the springs 21 are held spaced apart by means of the spacing sleeve 22 secured on the rod 17, and held in place by lock collars 23, also secured to the supporting rod 1'7. The lower ends of the coiled springs 21 are secured, by means of hooks 24, to the apertured bar 20, so that the normal tendency of the springs 21 is to bias the wide supporting bar 2t), and consequently the power drill support carriage, towards the upper end of the support, with the result that, when the drill is in operation, it is pressed downwardly toward its work by the operator in charge of the operation of the drill. It will also be seen that when the drilling has been completed, and the bar 20 released by the operator, the drill bit 16 will be withdrawn from the work, so that the work may be readily removed.

Secured between the standards 6, and secured to the standards adjacent to the lower ends thereof, are connecting rods 24, which are supplied with fastening nuts amnees 25 on the threaded ends thereof, for drawing the rods into supported relation with respect to the standards 6.

Spacing sleeves 26 are mounted on the rods 24, as better shown by FIGURE of the drawings, and normally support the work supporting jaws 27, which are arranged in pairs, and which move towards each other in clamping the work to be treated by the drill.

Each pair of jaws 27 is additionally supported at the inner end of a frame, which frames include side bars 28 formed with notches 29 in the lower edges thereof, which notches cooperate with the upstanding plates 33 as shown by FIGURE 3, for holding the work supporting jaws 27 in their positions of adjustment with respect to each other.

The bars 28 of each section of the work supporting frame, are connected at their outer ends by means of a transverse bar 31, which bars 31 may be used for eii'ectting vertical movement of the sections of the work holding frame to disengage the bars 28 from the upstanding plates 30 and permit the sections of the frame to be adjusted for clamping the work.

As shown by FIGURE 5 of the drawings, winged bolts .32 pass through threaded holes in the outer of the jaws 27 of each pair of jaws with the inner ends of the bolts contacting the inner jaw 27, thereby adjusting the jaws of each pair with respect to each other. After the initial positioning has been made, the jaws may be moved into close engagement with the work by operating the winged bolts 32, the work being indicated at 3 Between the ends of each pair of jaws 27, there is a coiled spring 33, which coiled springs normally bias the jaws of each pair towards each other, holding them in position for the final adjustment in clamping the work to be treated or bored.

As shown by FIGURE of the drawings, a supporting block 36 is used, which block is provided with supporting surfaces 34 arranged in stepped-like relation with respect to each other so that the support may be positioned in the path of downward travel ofa guide plate 10, thereby stopping the drilling operation at a desired depth.

A hand hold indicated by the reference character 35, is provided on the supporting block 36, so that the supporting block may be easily handled in positioning the same or removing it when the drilling operation has been completed.

From the foregoing it will be seen that due to the construction shown and described, 1 have provided a combined drill press or drill supporting stand, which is provided with work clamping means directly under the drill bit of the drill supported by the device, the drill being readily moved downwardly against the action of the springs 21 to gradually feed the drill through its work, the springs 21 acting to bias the drill support upwardly when the drill has passed through the work.

The bar 20, which is provided With an opening through which the cylindrical extension of the electric motor housing projects, drill is extended, contacts the upper surfaces of the work supporting jaws 27, when the Wide supporting bar 2% moves to the limit of its downward movement, thereby providing a stop for the further movement of the drill. It will be noted that, in view of the construction of the device an exceptionally light and durable power drill supporting stand has been provided which may be readily transported to the work, and one which will be eifective in securing the work in such position that it will be accurately bored by the portable electric drill.

In view of the foregoing detailed description, it is believed that a further detailed description as to the operation of the drill press is unnecessary.

Having thus described the invention, what is claimed is:

1. A support for a power tool driven by an electric motor comprised by at least two vertically positioned parallel standards, a work support mounted between said parallel standards adjacent the bottoms of the latter, guide plates slidably mounted on said parallel standards above the work support, a supporting bar positioned between the guide plates for supporting the electric motor, positioning bars mounted on said guide plates at right angles to same, parallel rods secured between said positioning bars, and opposed jaws adjustably mounted on said parallel rods for clamping the housing of the electric motor resting on the supporting bar.

2. A support for a power tool driven by an electric motor comprised by at least two vertically positioned parallel standards, a work support mounted between said parallel standards adjacent the bottoms of the latter, a supporting rod secured between the parallel standards adjacent the tops of the latter, guide plates slidably mounted on said parallel standards above the work support, a supporting bar positioned between the guide plates for supporting the electric motor, tension springs secured to the supporting rod and the supporting bar for resiliently supporting the latter, positioning bars mounted on said guide plates at right angles to same, parallel rods secured between said positioning bars, and opposed jaws adjustably mounted on said parallel rods for clamping the housing of the electric motor resting on the supporting bar.

3. A support for a power tool driven by an electric motor comprised by at least two vertically positioned parallel standards, connecting rods secured between said parallel standards adjacent the bottom of the latter for mounting a work support, a supporting rod secured between the parallel standards adjacent the top of the latter, guide plates slidably mounted on said parallel standards above the work support for movement longitudinally of the standards, a horizontally disposed supporting bar secured at its ends to the respective guide plates, positioning bars mounted on said guide plates at right angles to same for slidable movement parallel to the vertically positioned standards, inwardly extending rods secured between said positioning bars above and in parallel relationship to said supporting bar, and jaws on the said latter rods for clamping the housing of an electric motor resting on said supporting bar.

4. A support for a power tool driven by an electric motor comprised by at least two vertically positioned parallel standards, connecting rods secured between said parallel standards adjacent the bottom of the latter for mounting a work support, a supporting rod secured between the parallel standards adjacent the tops of the latter, guide plates slidably mounted on said parallel standards above the Work support for movement longitudinally of the standards, a horizontally disposed supporting bar secured at its end to the respective guide plates, tension springs positioned between the guide plates and secured at their respective ends to the supporting rod and the supporting bar for resiliently supporting the latter, positioning bars mounted on said guide plates at right angles to same for slidable movement parallel to the vertically positioned standards, inwardly extending rods secured between said positioning bars above and in parallel relationship to said supporting bar, and jaws on the said latter rods for clamping the housing of an electric motor resting on said supporting bar.

5. A support for a power tool driven by an electric motor comprised by at least two vertically positioned parallel standards, base bars secured to said standards adjacent their bottoms for mounting said standards in their vertical positions on any suitable supporting surface, parallel connecting rods secured between said parallel standards adjacent the bottoms of the latter, side bars mounted in parallel relationship to said parallel connecting rods, opposed work holding jaws slidably mounted on said parallel connecting rods, adjusting jaws slidably mounted on said parallel connecting rods and secured to the respective inner ends of said side bars, adjustment means between the adjusting jaws and the adjacent work holding jaws, and latching means between the side bars and the base bars for setting the side bars in selective positions lengthwise of the parallel connecting rods, 21 supporting rod secured bem9 tween the parallel standards adjacent the top of the latter, guide plates slidably mounted on said parallel standards, and a horizontally disposed supporting bar secured at its ends to the respective guide plates for mounting in vertically movable positions an electric drill motor above 5 the work holding jaws.

References Cited in the file of this patent UNITED STATES PATENTS 78,922 Brecht June 16, 1868 10

Claims (1)

1. A SUPPORT FOR A POWER TOOL DRIVEN BY AN ELECTRIC MOTOR COMPRISED BY AT LEAST TWO VERTICALLY POSITIONED PARALLEL STANDARDS, A WORK SUPPORT MOUNTED BETWEEN SAID PARALLEL STANDARDS ADJACENT THE BOTTOMS OF THE LATTER, GUIDE PLATES SLIDABLY MOUNTED ON SAID PARALLEL STANDARDS ABOVE THE WORK SUPPORT, A SUPPORTING BAR POSITIONED BETWEEN THE GUIDE PLATES FOR SUPPORTING THE ELECTRIC MOTOR, POSITIONING BARS MOUNTED ON SAID GUIDE PLATES AT RIGHT ANGLES TO SAME, PARALLEL RODS SECURED BETWEEN SAID POSITIONING BARS, AND OPPOSED JAWS ADJUSTABLY MOUNTED ON SAID PARALLEL RODS FOR CLAMPING THE HOUSING OF THE ELECTRIC MOTOR RESTING ON THE SUPPORTING BAR.

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