US2627706A - Sander attachment for shaping machines - Google Patents

Description

1953 P. P. 'ZWIREK SANDER ATTACHMENT FOR SHAPING MACHINES Filed July '19, 1951 5 Sheets-Sheet 1 4. T e U v m r Q 5 5 W U I d 2 a. a P l I 6 2 5 m n 1 y 1 w av n .w m Y m. at E v I I 6 5 m m m 6 6 2 l l l l l l l lfl 2. n vfl hnhhnnn V o l 0 1m 9 4 l w w v ATTORNEY Feb. 10, 1953 p, zwm 2,627,706

SANDER ATTACHMENT FOR SHAPING MACHINES Filed July 19, 1951 5 Sheets- Sheet 2 INVENTOR Pa 21] 2 ZWz'fak MMM ATTORNEY Feb. 10, 1953 zw 2,627,706

SANDER ATTACHMENT FOR SHAPING MACHINES Filed July 19, 1951 s Sheets-Sheet 5 1N VENTOR ATTORNEY Patented Feb. 10, 1953 UNITED STATES PATENT OFFICE.

SANDER ATTACHMENTFOR; SHAPING MACHINES Paul Peter Zwirek, New Orleans, La., assignor' of one-half to New Orleans Furniture Manufacturing Company, New Orleans, La., :2. company of. Louisiana 8 Claims.-

The present invention relates to a wood shap smooth surface theretoand thus eliminates hand:

sanding.

Other objects and advantages of the invention will becomeapparent from the following description when taken in conjunction with the accompanying claims and drawings.

Referring to thedrawings inwhich is shown a preferred embodiment of the invention:

Figure l is a detail plan View ofthe improved sander attachment shown associated with a shaping machine'and the workr Figure 2 is an enlarged detail sectional View taken substantially along the line 2-2? of Fig;- ure 1.

Figure?- is a sectional view taken substantially along theline 3-3- of Figure 1.

Figure 4 Ba sectional view takensubstantially along the fine tl of Figure 1.

Figure 5 is'a se'ctionalview taken substantiallyalong the line 5-5 of Figure'l'.

Figure 6 is a detail plan view showing'means for moving the guide wheel and the abradant member out of engagement with the work.

Figure 7 is a detail side view of the basefor supporting the fluid cylinder and its associated parts.

Figure 8 is a sectional view-taken substantially along the line 8-8 ofFigure 1.

Figure 9 is a detail perspective view of the means" for connecting the fluid cylinder to the adjustable slide on the base, and

Figure 10 is a detail perspective of a part 01 the front end of the base.

Referring to the drawings, It (Fig. 3) indicates apattern or jack which is suitably clamped or connected to the top of a shaper table, not shown.

and which supports the Work H, such as a piece of furniture, that previously has been cut to the desired shape. In order to impart a smooth sandedfinish to thework after it has been shaped by thev cutter, there isprovided a. sander attach"- 2 ment which includes a'fixed base or supportin member l2 (Fig. 4) having detachably mounted thereon a flat metal plate- 13- by the bolts l4 soasto constitute a bed on which are detachably secured the spaced side pieces 15' by the'clampin'g; screws IS. The inside surfaces of these piecesare inclined or cut at an angle as at H so" as: to engage complementary formed tapered sides [3' of a longitudinally slidable metal member or bar" l9 (Fig. 4); Thus; it will be seen thattheside pieces 11' coact with' the base t3 to provide a. guideway ofdove-tail shape. for' receiving the slidable member 19. It will be seen that upon releasing of the bolts lathe member l9 ma-y be adjusted longitudinally relative to the base: I3'= and upon tightening-up ofthe bolts lathe pieces l5 are forcedinto clampingengagement with;v the base and the tapered sides It of the member l9 so as to maintainthelatter in an adjusted: fixed position. The member [9: adjacent'itsin ner end has a plate 20 (Fig. 1) secured theretoby the bolts 21 and carriesan upwardly extend ing stud or pin 22 on which is clamped a=- split housing- 23 by the threaded. bolts 24. The housing. 23 has extending laterally and. outwardly therefrom. a reinforcing web 25. and an integral strap 26- (Fig. 9) that abuts against the inner end of a fluid. cylinder 2?. Threaded retaining. rods 28 extend through openings'in-thev plate-2'6" and the chamber head 29' of-' the cylinder 21' so. as to maintain the cylinder infixed positionwhen the nuts 3i] are secured tov the ends of. the rods. 28. A reciprocating piston 35 extends outwardly fromthe chamber Not the cylinder 21' and also through. a guide plate. 32' that projects laterally from the. side of the base it; A stop member 33. is axially adjustable on a rod" 34" which is; connected at one end to a-slidable' tubular'boss- 35 on the plate. 32 and at its opp'osit'e end. extends loosely through thelug-tt. on. the headI-ZQ, so as to be movable relativethereto. An extension plate 3'!- projects from thev plate Zitandkmay. be secured thereto by the. bolts 28 andlnut's. 3'il'l (Fig. 1).. A complementary. plate. 38 parallel! with. the. plate. 37 extends outwardly from.v the plate. 32 and-may be secured thereto by the bolts 32 (Fig. 10 A rod. 39. extends. through the: plates tl and 38 and carries: a sleeve 4i] between which and the plate 38 is confined a tension spring. 4|. threaded to-receive anut 12 and also carries a collar 43 betweenv which and the plate 38--is positioned a compression spring 44.

The adjustable slidablemember lil is of such a. length asto extend beyond; the; oppositeends The. outer end of the. rod 39." is

of the base l2 and at its inner end or adjacent the work II, is pivotally connected to a motor supporting arm 45 as at 46 (Fig. l). A plate or strap 41 has a lug 48 projecting rearwardly therefrom and overlaps a strap or extension 3| connected to the outer end of the piston 3!. The lug 48 may be pivotally connected to the strap 3| by the bolt 49 and the cotter pin 49, so that axial movement of the piston 3| imparts a swinging movement to the arm 45 and its associated parts, about the pin 46. The opposite end of the plate 47 overlaps the arm 45 and may be secured thereto by the spaced clamping bolts 50. Thus, it will be seen that the plate 41 constitutes an extension of the arm 45 so as to connect the latter both to the slidable member l9 and the piston 3| of the cylinder 27. Manifestly, the arm 45 and the plate 4! may be made in one piece. The supporting arm or member 45 extends laterally from the side of the base l3 so as to be positioned adjacent the work H and is preferably bent or curved as at 51 at an angle of substantially 45, and terminates in an end portion 52, to the underside of which is secured a metal base member 53 by the bolts 54 (Fig. 2). The underside of the base 53 is provided with the depending spaced side pieces 55 and 55, the piece 55 being detachably connected to the base 53 and the piece 55 preferably integrally extending therefrom. The spaced sides 55 and 55' coact with the base 53 to provide a substantially dove-tail shaped guideway which slidably receives a complementary formed elongated plate 56 (Fig. 3), to the outer end of which is revolubly mounted a wheel arranged to contact with the side of the pattern or support for the work H. An adjusting screw 58 extends through a depending threaded boss 59 of the plate 53, so as to engage the arm 56 and regulate the longitudinal movement of the wheel 5'! relative to the base 53. The rod 58 at its outer end may be formed with a knurled operating head 58. Spaced set screws 60 (Fig. 2) extend through the detachable piece 55', so as to provide means for clamping the plate 56 in a predetermined longitudinally adjusted position. An L-shaped bracket 61 has a horizontal arm 82 (Fig. 3) secured by the bolts 64 to the adjacent curved end of the supporting arm 45, and the vertical arm 65 of the bracket has an elongated slot 66 (Fig. 2) for slidably receiving a locking bolt 67 for adjustably connecting a supporting plate 68 thereto. An electric motor 69 is connected to the plate 58 by the bolts 69 so as to be supported and be movable therewith. The motor 69 has extending downwardly and centrally therefrom, a rotatable shaft H which is detachably connected to a conventional or wellknown sanding device including a. drum 12 having a centrally disposed sleeve 13 into which the shaft 1! extends and is adjustably secured by the set screws 14. To the outer periphery of the metal drum or disc 72 is connected a suitable abradant, such as sandpaper, emery or the like 15, which is arranged to be brought into finishing engagement with the side of the work Ii after it has been shaped by the cutter. When it is desired to temporarily suspend the sanding operation, a protuberance in the form of a semicircular wooden button or the like 76 may be detachably connected to the side of the pattern or jack (Fig. 6), so as to be positioned in the path of the roller 51 in order to move the abradant member away from the work H.

The side pieces (5, while shown separate from the base l3, may be integrally formed therewith in order to provide the dove-tail guideway. The longitudinally adjustable bed member l9 may be provided with threaded openings for receiving set screws 11 (Fig. 1) that coast with the clamping screws [5 for maintaining the bed [9 fixed in its longitudinally adjusted position. Additionally, oil cups 18 may be connected to the side pieces l5 so as to lubricate the movable surfaces of the member [9 which contact the pieces [5. The motor 69 is connected by the insulated cable or wire 29 to a source of electrical energy for causing the rotation of the abradant wheel 75.

In operation, assuming that the work H, such as a piece of furniture, has been shaped by the cutter to form the desired pattern, the sander or abradant attachment is then moved to the position as shown in Figure l. The bed 49 is first longitudinally adjusted to properly position the abradant 15 in engagement with the side of the work and the bed 19 is clamped in a fixed position by tightening-up of the set screws [6 and H. The longitudinal displacement of the bed I!) simultaneously moves the hydraulic cylinder 21 which is connected thereto by the web 25 and the plate 26. At the same time, the plate 56 is longitudinally adjusted so as to properly position the wheel 5'! in contact with the pattern or jack It by the manual actuation of the rod 58, and is clamped in its adjusted position by tightening-up of the set screws 60 which forces the removable piece 55 to be brought into tight frictional engagement with the adjacent tapered face of the bed 55. Air or other fluid i then introduced under pressure through the pipes 18 into the head of the cylinder 29, so as to force the piston 31 and plates 32 and 38 rearwardly or away from the work it and against the tension of the compression spring 4|. The rearward movement of the piston 3| is limited by the engagement of boss 35 with the adjustable strap 33 (Fig. 8). The inward movement of the piston 3| simultaneously causes the arm 45 to swing about its pivot 46 so as to yieldably urge the abradant surface 15, now being rotated by the motor 69, into sanding contact with the rough design previously cut by the shaper on the work I I. It will be seen that the sander 15 fits closely into the curves of the design and are held in close yielding engagement therewith by the action of the compressed air in the cylinder 29 and the tension spring 39. Thus, the rough cut made by the shaper is properly sanded and given a smooth and uniform finish, without requiring the manual handling of the material or work ll.

When the air pressure is released from the cylinder head 29, the compression spring 44 tends to move the piston 3i outwardly towards the work and the abradant 75 away therefrom. In this connection, it might be mentioned that the tension of thesanding device is regulated by the air pressure admitted into the cylinder 27 and also by the tension applied to the spring 39and the compression spring 44 disposed on opposite sides of the plate 38 (Fig. 1). The tension spring 4! may be considered as applying a backward or rearward pressure to the piston 31 and the operating arm 45, while the compression spring 44 tends to apply a forward pressure which may be adjusted or regulated by the nut 42. Thus, it will be seen that the longitudinal adjustment of the slidable member [9 acts to regulate the depth of force exerted by the sanding wheel or abradant 15 against the work ll. As the piston Si is slidably mounted in the cylinder 21 and also operatively connected to the arm 45, it is free to move back and forth in connectionwith the. pressure exerted against the work It by the.

abradant 75-. The guide roller- 51 is longitudinally adjusted so as to contact with the pattern or jack It in order to control the depth of cutforward in the plate 53, it tends to hold the sanding. surface 15 away from the. work, so that the, pressure: exerted on the drum 12 is reduced and consequently the cut made by the sandpaper i5is less and lighter. When it is desiredthat the sandpaper I5 not be brought intoen gagement with the work without cutting off the motor 69, or if it is desired to stop the sander at a certain point in the finished material, the protuberance 16 may be nailed or otherwise connected to the pattern (Fig. so as to move the roller 51 and the sander away from the work, as shown in dotted lines in Figure 6.

Thus, it will be seen that a simple, efficient and positive sander attachment is provided which can be readily associated with a shaper table or the like in order to impart a smooth finish to the work after the same has been shaped by a wood cutter or the like. Additionally, pneumatic means are provided for yieldably maintaining and guiding the sanding wheel in proper position and for effecting ready adjustment of the parts, so that the attachment may be conveniently used for providing a smooth sanded finish to various types and shapes of patterns used in manufacturing furniture and other articles made of wood or the like, so that the material is at once ready for assembling without requiring manual handling for sanding the same.

The form of the invention shown is merely illustrative of a preferred embodiment and it is understood that such changes may be made as come within the scope of the following claims.

I claim:

1. In combination with a work carrier, a sander attachment for acting upon the work, said attachment including a base, an operating arm pivotally connected to the base and extending transversely thereof, said arm having a curved end portion, a motor mounted on said end portion, an abradant member operatively connected to said motor and arranged to be moved into sanding engagement with the work, a guide wheel adjustably mounted on said arm and arranged to engage the work carrier for maintaining the abradant wheel in proper position relative to the work, fluid pressure means connected to said operating arm adjacent the other end thereof for swinging the arm about its pivot in order to move the abradant member in engagement with the work, and spring means operable when the fluid pressure means is released for moving the abradant member away from the work.

2. In combination with a work carrier, a sander attachment for acting upon the work, said attachment including a base, a longitudinally movable member adjustably mounted on said base, an operating arm pivotally connected to said movable member and extending laterally from one side thereof, said arm terminating at one end in a curved portion, a motor mounted on said: curved portion, an abradantz member ope.

eratively connected to. saidv motor, a: hydraulic:-

cylinderconnected to. said movable membersd. as to be longitudinally displaceable therewith, said cylinder having. a piston connected to; said:

operating arm so as. to. cause the same. to: be swung about its. pivotin order to move the. abrae dant member in engagement: with. the work; and.

spring means for moving the. operating; arm and; the, abradant, member away from; the; work...

3;. In combination with a workicarrier, asanden: attachment'for acting uponthe work, said attache ment including a base, a longitudinally movable.- member adjustably mounted on. said. base; a. fluid: pressure cylinder spaced.from.said.movable.mem=- ber and having a, reciprocating plunger,. means connecting. said member to said: cylinder: so; as: to be. movable; therewith, a. supporting; arm exetending' transversely from oneendof said move able member, means pivotally connecting said supporting arm to said movable member, means operatively connecting said plunger to said supporting arm for swinging the same about its pivotal connection with said member, a fixed guideway connected to the opposite end of said supporting arm, a bar movably mounted on said guideway, a motor mounted on said bar so as to be movable therewith, a rotary abradant member operatively connected to the motor and arranged to contact the work to impart a finished surface thereto, and means arranged to engage the carrier for controlling the position of the abradant relative to the work during the operation of the machine.

4. In combination with a work carrier as called for in claim 3 in which means are provided for introducing fluid under pressure into said cylinder to move and maintain the abradant member in engagement with the work, and means are also provided when the fluid pressure is released in the cylinder for moving the abradant member away from the work.

5. An attachment of the class described including a base, a member slidable on the base, an operating arm extending transversely of said base and connected to said member, a fluid pressure cylinder, means connecting said cylinder to said member so as to be movable therewith, means for clamping said member in an adjusted position, a guide plate, said cylinder having a piston extending outwardly therefrom and through said guide plate, means connecting said piston to said operating arm, means for introducing fluid under pressure into said cylinder for moving the piston and said arm in one direction, spring means connected to said base and positioned on one side of said guide plate for coacting with said piston to move said arm, and a tension spring operatively connected to said piston and positioned on the opposite side of said guide plate for moving the same and said arm in an opposite direction when the fluid pressure to the cylinder is withdrawn.

6. An attachment as called for in claim 5 in which the clamping means includes spaced longitudinally disposed pieces having inclined sides arranged to engage complementary sides on said member, and means for detachably connecting said pieces to the base to firmly maintain said member in a fixed position.

'7. In combination with a work carrier, a sander attachment for acting upon the work, said attachment including a base, an operating arm pivotally connected to the base and extending laterally therefrom, a revoluble abradant member connected to said arm, means operatively connected to said arm for moving the abradan t member about its pivot and in engagement with the work, means for moving the abradant member away from the work, a guide roller for maintaining the abradant in proper operative position relative to the work, and a detachable protuberance connected to the work carrier and positioned in the path of said roller for moving the abradant out of engagement with the work.

8. In combination with a work carrier. a sander attachment for acting upon the work, said attachment including a base, a longitudinally movable member adjustably mounted on said base, an operating arm pivotally connected to said movable member and extending laterally from one side thereof. a revolvable abradant member connected to said arm and movable therewith for engagement with the work, fluid pressure means connected to said longitudinally movable member 8'. and operatively associated with said arm so as to cause the same to be swung about its pivot in order to move the abradant member into engagement with the work, and means for moving the 5 arm and abradant member away from the work.

PAUL PETER ZWIREK.

REFERENCES CITED The following references are of record in the m file of this patent:

UNITED STATES PATENTS

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