US2603975A - Tool stand - Google Patents

Description

July 22, 1952 w. M. SHOFFNER TOOL- STAND 3 Sheets-Sheet 1 Filed Sept. 20, 1946 m m PJN W5 9B0 u m m l- N. Y B

July 22, 1952 w. M. SHOFFNER 7 TOOL STAND Filed Sept. 20, 1946 v 5 Sheets-Sheet 2 ATTORNEYS July 22, 1952 w. M. SHOFFNER TOOL STAND 5 Sheets-Sheet 5 Filed Sept. 20, 1946 FIG. 4

INVENTOR WILLIE u. SHOFFNER BY r (Luz/M Joujmu'm ATTORNEYS apparent from the drawings I trated in Figure 1. l a I Figure 4 is a partial elevational and partial Patented July 22, 952

UNITED-STATE TOOL STAND Willie M. Shofiner, Dayton, Ohio 1 Application'september 20, 1946, Serial No. 698,324

This invention relates to a tool stand.

object oftheeinve'ntion-is, to provide a tool stand upon which -a'pluralityof metalworking tools are removably'supported and 'areadap'ted for individualattachment to a power unit according to selective use .of' the metalworking 1 tools.

Another object of the invention is to provide a tool stand in accordance with the foregoing object wherein-a single power u'nit,.such as an electric motor, is selectively attachable to anyone of a number of metalworkingtoolscarried on the tool stand for individually power-driving the same, and whereinthe metalworking tools are adapted to be rotated about thepower unit so as to bring them into alignment with the drive shaft of the power unit for connection to the same.

Stillanother object of the invention is to provide a tool stand in accordance with the foregoing objects wherein the tool stand is provided with bins adapted to store metalworking tools which can be readily installed upon thetool stand for replacement of one of the tools carried on the tool stand for purposes of: providing special metalworking devices which are interchangeable with those installed on thetool stand sot-hat t special metalworking devices can be power-driven from the same power unit which drives the metalworking tools on the tool stand.

Still anoth'er'object of the invention is to provide a tool stand havingHpower-driven metalworking units on the same in accordance with the foregoing objects wherein the power unit is controlled by means of a foot-operated control switch so that the hands of the operator are left free to manipulate the work through the metalworking tools. y

Further objects and advantages willbecome and the following description. i a i In the drawings:

Figure 1 is a perspective elevational view of a "i a. (or. 74-16) In this invention the tool stand consists of a vertical supporting-post In that is supported in a vertical position by means of abase structure I l.

The base structure ll consists .of a central member l2'to which the post lll isgsecured and has a plurality of radially extending arms H! which connect with a frame base l4. A pluralit of arms l5 extend from the frame base M to engagement with a thrust-bearing ring it secured to the'post M. The arms thereby provide for holding the post H) in a vertical position A turntable is:rotat,ably carried upon the post I0 so that the individual sheet-metalworking tools carried upon the turntable 20 may be brought into alignment with the drive shaft of a power unit 30, which in this instance is an electrio motor provided with a speed-reducing head The turntable 20 consists of a frame 2| which forms a platform for suppor ing thev metalworking tools 25. The platform 2| is provided with a sleeve 22 located centrally thereof-which is journaled upon the supporting-postllla A similar sleeve 23 is positioned co-axial with the sleeve 22, and beneath the same-,and is secured inposition by'means of a plurality of :angularlyextending arms 24 which connect the sleeve 23 with the platform 2'! to holdit in position, Thesleeve 23 tool stand constructed in accordance with this i invention. I p I Figure 2 is a vertical cross-sectional view taken through the tool stand illustrating the construction thereof. I Figure 3 is a plan view ofthe tool stand illuscross-sectional view of a connecting member for connecting between the metalworking tools and the power unit.

Figure 5 is a horizontal cross-sectional view taken along line 5-5 of Figure 2.

is'als'o journaled upon the shaft l0 and engages the thrust bearing sleeve It secured to the post 10.

A thrust-bearing sleeve- 26,15 engaged by the upper sleeve '22 of the turntable 20, thus providing two points of., thrust support for the turntable! I I I Y The upper thrust-bearingsleeve 25 is formed in the manner of a split, sleeve consisting of the twov parts 26a andztb, see Figure 5, held together by means of bolts 21. This arrangement allows for placement of the platform 20 upon the support-post 18, with subsequent location of the thrust-hearing sleeve 25 in its proper position.

provided for storage of extra metaleworking tools.

The bins 29 may be formed by sheet-metal walls 3| extending between-the arms 24. "Also, if

desired, "vertical sheet-metal walls 32 may be provided between the bins, 29, or one large bin can be provided beneathxthe platformby using only the sheet-metal walls 3|, as desired.

The platform 2| is provided with a plurality of tool posts 36 which carry the metalworking tools 25. The metalworking tools 25 are remov- 3 ably secured to the support post 36 to provide for removal and replacement thereof. The tools 25 may be removably secured by means of threaded engagement with the support posts 36, as illustrated by the threaded engagement 31, or

may be secured to the posts 36 by means of a set screw arrangement 38. Also, the support post 36 may be removably secured to the platform 2|, such as illustrated by the support posts 36a.

The power unit, such as the electric motor 30, is carried upon a platform 40 secured to the upper end of the support post ID. The drive shaft 4| of the power unit 30 which extends from the vided with an extension shaft 45, see Figure 4,

which is provided'with a universal joint connection 46 which has a square shaft 41 extending from the universal joint connection 46.

The power shaft 4| of the power unit 3!] may be provided with a chuck 48 for connecting the square shafts '41 of each of the power tools 25 with the power shaft 4|, to thus selectively connect the metalworking tools to the power unit 30.

As illustrated in Figure 4, the chuck 48'may consist of a sleeve 49 having a square opening 50 to receive the square shaft 41. The sleeve'49 is carried upon the shaft 4| and may be provided with a plurality of teeth 5| engaging spline recesses 52 in the shaft 4| to cause rotation of the sleeve 49 with the shaft 4|. A spring 53 urges the sleeve 49 into the position illustrated in Figure 4 for engagement with the square shaft 47.

Disconnection of the shaft 41 from the shaft 4| may be occasioned by moving the chuck sleeve 49 to the right, as illustrated in Figure 4.

To properly align the drive shaft 45 of the respective tools 25 with the drive shaft 4| of the electric motor 30, the turntable 20 is'provided with a series of holes 55 which are radiallya in alignment with the support posts 36 relative to the axis of the'support post In." A stop-post 56 is carried upon a lug 51 on the post I and is adapted to extend downwardly into the holes 55 to position any one of the tools 25 with the drive shaft thereof in alignment with the driv shaft of the power unit 30.

To allow the hands of the operator to be free in supporting the work, a foot-operated switch ations are performed on the metal in forming various sheet-metal parts. Previously, it was necessary for one operator to handle the work and another to operate the tool. By theme of this invention, however, one operator can perform as much, and more work than that performed by two operators previously.

The speed-reducing head 33 may be of any conventional form, but as illustrated in Figure 2, it may consist of a worm 65 which drives a wormwheel 66, these members being contained within the casing 61.

While the apparatus disclosed and described herein constitutes a preferred form, and has been described with reference to the use of metalworking tools, yet it will be understood that the apparatus is capable of alteration and of use with tools of other kinds such as plastic-working tools or leather-working tools, without departing from the spirit of the invention, and that all modifications that fall within the scope of the appended claim are intended to be included herein.

Having thus fully described my invention, what I claim as new and desire to secure by Letters 7 Patent, is:

A portable power tool stand for supporting tools thereon for selective operation irrespective of the elevation of the tool on said stand, said portable power tool stand comprising a base member, a support post secured to; said, base member and extending vertically therefrom, a horizontally disposed turntable rotatably mounted on the said support post, said support post extending through said turntable at the axis of rotation thereof, said turntable having a flat upper surface extendm around the periphery thereof, at least one tool readily removably mounted on'said flat upper surface of the turntable, said toolhaving a driven shaft, a prime mover mounted on the upper end portion of said support post, a drive shaft rotated by said prime mover, said prime mover drive shaft having a chuck mounted on its outer end, said driven shafton the tool having a chuck-engaging end portion and a universal joint providing for vertical misalignment of said drive and driven shafts, latching mechanism comprising a series of circumferentially arranged holes in said turntable and cooperating aperturedlug carried by said support post, said lug having a stop bolt carried thereby which is insertable insaid lug aperture and an aligned hole on said turntable whereby said tool support and turntable is locked together, and means'for controlling the operation of said prime mover.

' WILLIE M. SHOFFNER.

REFERENCES error) .The following references are of record in the file of this patent:

UNITED ST TES PATENTS 396,131 Great Britain Aug. 3, 1933

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