US2320639A - Sanding belt machine - Google Patents

Description

June 1, 1943. F. H. MORRIS 2,320,639

SANDING BELT MACHINE Filed March 30, 1942 3 Sheets-Sheet l (E /14. "mm

June 1, 1943. F. H."M.ORRIS 2,320,639

' SANDING B ELT MACHINE Filed March 30, 1942 3 Sheets-Sheet 2 Filed March 50, 1942 3 Sheets-Sheet 3 Patented June 1, 1943 UNITED STATES PA N orricsff Application March 30, 1942, Serial No. 436,881

4 Claims. 01. 51-139) My invention relatesto an improvement in sanding belt machines designed more particular- 1y for sanding and/or polishing curved surfaces, and the present invention i an improvement on my invention disclosed in application Serial No. 378,980, filed by me February 14, 1941.

My present improvement has all the advantages of the above referred to invention, plus means for adapting the work table to moldings or other work having two sides or ends at an angle at some point throughout the width or length, thus presenting a curved corner or edge requiring sanding and/or polishing.

In the accompanying drawings:

Fig. l is a view in side elevation;

Fig. 2 is a vertical sectional view taken at right angles to Fig. l, and looking in the direction of the arrows;

Fig. 3 is a plan view partly in horizontal section showing the table and the adjustments in full and in dotted lines;

Fig. 4 is an end view showing the table in cross-section with a piece of the stock being worked on in position astride the bend in the table.

Since the superstructure of this machine is substantially the same as is disclosed in the application above identified, brief reference only thereto will be made.

The numeral I represents a sanding belt extending practically from top to bottom of the machine over a drive-pulley 2 on shaft 48 at the top and beneath the guide-pulleys 3 at the bottom. The drive pulley 2 is secured to and driven by the shaft 3, and the latter is rotated by the motor M through the belt 5 on pulleys 6 and l. The belt passes transversely over the work W for sanding and polishing the same. Springactuated presser roller 8 holds the Work W down on the table T where it is fed forward by the feed rollers 9 and I0, which latter are preferably arranged in pairs and mounted on shafts H and I2, respectively, and these are driven through the shaft l3, mounted on the side ofthe table, through transmission bevel gears 14. The shaft I3 is driven by the motor M and worm-gear transmission [5.

The table T is divided longitudinally into two leaves 16 and IT conveniently held together by hinges l8 at their adjacent edges, the details and purpose of which will now be explained.

Levers I9 are pivoted or fulcrumed on the frame of the machine at 20 and are pivotally connected at 2| to arms 22, 22, extending laterally from the leaf [6 of the table.

A screw 23 is swiveled in a block. 24 pivotally supported by a bracket 25 extending from the frame of they machine and turns in a nut 26 pivoted to the bracket 21 extending from the 3 frame of the machine, all of which is clearly shown in Fig. 2.

Bolts 28 and 29 are pivoted on the under side of the leaf I6 of the table and the base of the machine, respectively. These have right and left threads and are connected by the turn-buckle 30 as one approved means of adjustment for the table. I W

A screw-shaft 3| extends from its support 32 beneath the leaf ll of the table where it is swiveled, to a threaded nut 33 which is in the form of a cross-bar pivotally supported at its ends in the base of the machine, and this screw-shaft 3| is provided with a hand-wheel 35 as a convenient means for turnine same.

By means of these various adjustments which have just been described, the table may be raised or lowered bodily in horizontal position; it may be tilted as a Whole, that is to say with the two leaves in alignment, just as in my former invention; either leaf may be tilted at an angle; or both may be tilted at an angle with relation to each other by simply turning and manipulating the screws 23 and/or 3| and/or the turnbuckle 30, as would be readily understood by anyone operating the machine.

This provides great flexibility for the sanding and polishing of work or stock to suit the angle formed in the stock or work to be finished. 'In Fig. 4, a typical angle is illustrated, namely a right-angle, although that is only one of many angles which might be taken care of with this machine.

In order to'properly position the work W upon the table T when adjusted atan angle, a gauge 36 of any approved form may be fastened adjustably or otherwise to the leaf IT as by means of the rods 31 and set-screws 38, or the rod 31 might be in the form of screws extending through threaded nuts 39. As shown in Fig. 4, the lower edge of the work W rests upon and is guided by this gauge 36 in a direct line lengthwise of the table.

Another function of this sliding adjustable gauge is that it insures getting the oval turn directly underneath the sand belt, and in short is adaptable for supporting a great variety of different forms of work and properly gauging it with respect to the sanding belt.

Thus, in a simple way, provision is made for sanding and polishing work or stock of various angles with facility.

I claim:

1. A sanding machine including a frame, a table divided lengthwise into at least two leaves, means for angularly adjusting said leaves independently or as a unit whereby they may be held in alignment or at various angles with respect to each other to accommodate the work or stock being sanded.

2. A sanding machine including a frame, a table divided lengthwise into at least two leaves, means for angularly adjusting said leaves independently or as a unit whereby they may be held in alignment or at various angles with respect to each other to accommodate the work or stock being sanded, means for feeding the stock, means for holding the stock in place while being sanded, and sanding means for sanding and polishing the work or stock.

3. A sanding machine including a frame, a table divided lengthwise into at least two leaves, means for angularly adjusting said leaves independently or as a unit whereby they may be held in alignment or at various angles with respect to each other to accommodate the work or stock being sanded, said adjusting means including swivel screws connected with each leaf of the table with pivotally supported threaded nuts in which they are capable of turning in the adjusting and locking of the leaves of the table in their required relative positions.

4. A sanding machine including a frame, a table divided lengthwise into at least two leaves, means for angularly adjusting said leaves independently or as a unit whereby they may be held in alignment or at various angles with respect to each other to accommodate the work or stock being sanded, said adjusting means including swivel screws connected with each leaf of the table with pivotally supported threaded nuts in which they are capable of turning in the adjusting and locking of the leaves of the tablein their required relative positions, and a turn-buckle adjustment connected with one of the leaves of the table and to the frame of the machine supporting the table, said adjustments all connected with the frame and providing support for the table.

FRED H. MORRIS.

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