US2768486A

US2768486A - Multiple band saw honing mechanism

Info

Publication number: US2768486A
Application number: US512058A
Authority: US
Inventors: Leonard R Jones; Joseph E Jones
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-05-31
Filing date: 1955-05-31
Publication date: 1956-10-30
Anticipated expiration: 1973-10-30

Description

Oct. 30, 1956 1 R, JONES ETAL 2,768,486

MULTIPLE BAND SAW HONING MECHANISM 4 Sheets-Sheet 1 Filed May 51, 1955 0 T5 N9 mw WT eh m m W L BY Jls rh R I m .TL m "4 Oct. 30, 1956 L. R. JONESW ET AL 2,763,486

MULTIPLE BAND SAW HONING MECHANISM 4 Sheets-Sheet 2 Filed May 51, 1955 $4 w= t h..

INVENTOR LQomvd Rmmes BY Jose h E. Maw 611a (Eves T Oct. 30, 1956 R. JONES ET AL 2,768,486

MULTIPLE BAND SAW HONING MECHANISM 4 She'ts-Sheet 3 Filed May 51', 1955 v INVENTORS, Lonawl R 337185 By 3052 h ETmnes )Mwl 1956 R. JONES ET AL 2,7

MULTIPLE BAND SAW HONING MECHANISM 4 Sheets-Sheet 4 Filed May 31, 1955 IN VEN TORS United States Patent MULTIPLE BAND SAW HONING MECHANISM Leonard R. Jones and Joseph E. Jones, Kansas City, Mo.

Application May 31, 1955, Serial No. 512,053

9 Claims. (Cl. t1246) This invention relates to multiple hone assemblies for concurrently honing a plurality of spaced saw blades such as those used in the slicing of bread and other commodities. These blades are usually ground or fiuted on their cutting edges and after a period of use the blades must be honed as they otherwise tear or mutilate the articles being cut or sliced.

A further object of the invention is to produce a construction of the character described which may be permanently mounted on a slicing machine and swung to and from operative position at will.

A still further object of the invention is to produce a construction in which the angular relation of the hones to the blades can be limited together with a construction for progressively advancing the hones so that a new surface is presented to the blades on each pass of the hones to one blade and another.

Another object of the invention is to provide means whereby the operative parts are locked against accidental movement.

With the general objects named in view and others as will hereinafter appear, the invention consists in certain new and novel features of construction and organization of parts as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawings, in which:

Figure 1 is a vertical section through a bread slicing machine to illustrate the relative location of the endless cutting blades or saws and the sharpening or honing mechanism of the invention.

Figure 2 is a fragmental rear view of the machine as shown in Figure 1.

Figure 3 is an enlarged top plan view through the sharpener as shown in Figure 1.

Figure 4 is a section on the line IVIV of Figure 3.

Figure 5 is a section on the line V-V of Figure 3 with certain parts omitted for clearance of illustration.

Figure 6 is a section on the line VIVI of Figure 5.

Figure 7 is a fragmental section on the line VIIVII of Figure 3.

In the said drawings, where like reference characters identify corresponding parts in all of the Figures, 1 indicates the end frame members of a bread slicing machine, and journaled adjacent the top and bottom of the ma chine are driven rollers 2 and 3 which frictionally drive endless saw or cutting blades 4, said blades encircling the rollers in flatwise position, but being forced by guide fingers 5 to edgewise relation during their passage through the loaves of bread which are fed to the saws on a platform 6.

The device of the invention comprises a support shaft 7 spanning the blades and journaled in bosses 8 carried by the inner faces of the end frame members 1. Shaft 7 is the main support for the honing device and loosely journaled thereon are two or more arms 9 which rigidly carry an L-angled frame member 10. Extending lengthwise of the frame 10 and held in journaled relation by straps 11 is a shaft 12 equipped with arms 13 at its ice opposite ends. The arms 13 carry cam pins 14 which rotate and slide on a shoulder 15 formed on the inner faces of the frame members 1. With this arrangement, assuming the shaft 12' is rotated so that the arms 13 parallel the shoulder 15, as shown in full lines, Figure 4, the frame 10 is moved away from the saws 4, and when the shaft 12 is rotated so that the arms 13 are substantially at right angles to the shoulder 15, the frame 10 is moved toward the saws 4 as shown in dotted lines, Figure 4.

Secured to the upper side of the angle frame 10 are a series of split saw guides 16 held in position by a clamping plate 17. Pivoted on pins 18 below the angle frame 10' are a series of bearing blocks 19 which rotatively and slidingly receive cylindrical hone carriers 20, the front ends of said carriers being tubular and being split to receive the rear end of hones 21, which are clamped in position by knurled nuts 22.

The hone support shaft 7 is mounted above the cross over point of the blades 4 as shown in Figure 1, and when the shaft 12 is rotated the entire assembly moves from the solid line position, Figure 2, to the dotted line position, same figure, the hones normally being centrally positioned between the saws and the guides 16 receiving the blades or saws 4 in their kurfs or slots so that the blades will be held in edgewise relation for honing. From the construction above described, it will be apparent that if the carriers 19 are oscillated on their pins 18 and the hones have sufficient length, they will rock from side to side and alternately contact adjacent saw blades 4.

In order to advance the hones between the saws and provide for concurrent oscillation of said hones, the rear end of hone carriers 20 are journaled in tapered openings 23, Figure 3, formed in bar 24 paralleling the frame 10. The ends of bar 24 are reduced and bevelled as at 25, Figure 3, to rock in slots in the ends of arms 26 which are keyed to the shaft 7. This arrangement permits the bar 24 to remain parallel to the frame 10. To longitudinally slide the hones 21 forwardly through their bearing blocks 19, a hand operated bell-crank lever 27 is pivoted to an ear 28 projecting from the rear side of the angle bar 10, the operating end 29 of said lever 27 being received in the bifurcated end of a lever 30 keyed to the shaft 7. When the lever 27 is manually operated the bar 24 is swung to advance the hones 24 between the blades 4 through contact of the face of the bar 24 with the shoulders 30a on the reduced journaled ends of the cylindrical hone carriers 20, see Figure 3. During the honing operation lever 27 is manipulated to effect back and forth reciprocation of the hones 24 so that their full length will be used in the honing operation, thus distributing the wear on the hones and leading to a prolongation of their useful service life.

When the hones 21 have been advanced as described, horizontal reciprocation of the bar 24, as hereinafter described will swing the rear ends of the hone carriers 20 pivoted in the tapered openings 23 and cause the bearing blocks 19 to oscillate on the pins 18 so that the hones are adjusted to contact either of their adjacent blades 4.

As it is desirable to spring tension the hones against the blades as they are manually oscillated as will hereinafter appear, and also to insure that the hones are centrally positioned between the saws or blades when the spring tension is not overcome by manual force, a master bearing guide 31 is mounted at one end of the frame 10, said guide having four anti-friction rollers 32 journaled to snugly embrace the hone carrier 20. The master guide is pivoted to frame 10 on pin 33 so that it can be oscillated and is provided with a rounded extension 34 for contacting an anti-friction roller 35 journaled on an arm '36 pivoted at 36a to the angle bar 10. Spring tension is applied to arm 36 by a spring 37 having its other end secured to a fixed arm 38 projecting from the bar 10. The degree of spring pressure tending to center the hones in relation to the saw blades can be changed by substituting springs 37 or by changing the contour of the extension arm 34. The extent or degree of manual oscillation of the hones as effected by a handle 43, hereinafter described, can be limited through set screw stops 39 carried by ears 40 projecting from fixed arm 38 which limit oscillation of cam 34.

In order to apply right and left longitudinal movement to the bar 24 and also provide means for conveniently swinging the whole assembly to and from operative relation to the blades, a block 41 is keyed to the shaft 12, and swivelled to its underside is a second block 42 which is attached to the end of a manually operable lever handle 43, Figure 5. When the handle 43 is swung vertically upward, Figure 5, as indicated by the dotted line position of lock plate 48a hereinafter described, shaft 12 is rotated to cause its cam pins 14 to ride on shoulders and retract the frame 10 from the blades 4. When the handle 43 is moved downwardly to full line position, Figure 5, it enters a T-slot 44 in a plate 45 carried by the end of an arm 46 pinned to shaft 7 and also enters a straight slot 47 in a plate 48 secured to the reduced end of the bar 24. When the handle enters both slots it may be swung horizontally from side to side on its pivot block 42 and impart longitudinal movement to the bar 24 causing the hones to oscillate from right to left into contact with one or the other of the blades. The machine is turned on so that the blades are travelling and the honing operation proceeds as described, namely, bar 24 is shifted longitudinally so that the hones are oscillated to contact one or the other of their adjacent blades, and while the blades are moving relative to the hones, movement is imparted to lever 27 to slide the hones back and forth so that the full length of the hones is brought into contact with the blades. After one side of each blade is honed the bar 24 is longitudinally shifted in the other direction to grind the edge of the adjacent blades, such movement effecting step by step rotation of the hones through the gears 49 and pawls 50 to expose a different area of their circumference to the blades, and the grinding operation is continued. The double slot arrangement 44-47 is a safety measure which makes it necessary to center the hones between the blades before the assembly can be moved toward the blades or oscillated from side to side. As a further precautionary measure a lock plate 48a secured to block 42, projects below the handle 43, the upward swinging movement of said handle 43 throwing the lock plate 48a into the path of travel of the reduced end of the bar 24, as shown in dotted lines, Figure 5, so that the hones cannot be advanced toward the blades by oscillation of handle 27.

To provide means to rotate the honing stones and present new operating surfaces to the blades, the projecting end of the cylindrical carriers are equipped with gear wheels 49. Pivoted to the rear face of the bar 24 are a series of gravity pawls 50 which ride on the teeth of the gears 49 and lock the gears against rotation in one direction. With this arrangement it will be apparent that when the gears 49 move away from the pawls 50 in the oscillation of the bar 24, said pawls gravitate on their pivot pins 50a and one or more teeth will freely pass under the pawl. However, on reverse movement of the gears these pawls enter the teeth and advance the gears step by step and thereby rotate the hones or abrasive rods 21.

From the above description and drawings, it will be apparent that we have produced a construction embodying all of the features of advantage set forth as desirable, and While we have described and illustrated the preferred construction, it is to be understood that we reserve the right to all changes within the spirit and scope of the appended claims.

We claim:

1. The combination in a machine having a plurality of equi-spaced band saws, a frame mounted relative to the machine and extending transversely of the saws, a plurality of bones pivoted to oscillate transversely of the frame on axes substantially bisecting the spacing between the saws, means to effect relative travel of the hones and saws longitudinally of the latter, and means to oscillate the hones to alternately contact adjacent saws.

2. The combination in a machine having a plurality of equi-spaced band saws, a frame rockingly supported in the machine and extending transversely of the saws to move toward and from the same, means to rock the frame, a plurality of hones pivoted to oscillate transversely of the frame on axes substantially bisecting the spacing between the saws, means to efliect relative travel of hones and saws longitudinally of the latter, and means to oscillate the hones to alternately contact adjacent saws when the frame has been moved toward the saws.

3. The combination in a machine having a plurality of equi-spaced band saws, a frame mounted relative to the machine and extending transversely of the saws, a plurality of hones pivoted to oscillate transversely of the frame on axes substantially bisecting the spacing between the saws, means to effect relative travel of the hones and saws longitudinally of the latter, means to oscillate the hones to alternately contact adjacent saws, and means to longitudinally advance the hones independently of movement of the frame.

4. The combination in a machine having a plurality of equi-spaced band saws, a frame rockingly supported in the machine and extending transversely of the saws to move toward and from the same, means to rock the frame, a plurality of hones pivoted to oscillate transversely of the frame on axes substantially bisecting the spacing be tween the saws, means to effect relative travel of the hones and saws longitudinally of the latter, means to oscillate the hones to alternately contact adjacent saws when the frame has been moved toward the saws, and means to longitudinally advance the hones independently of movement of the frame.

5. The combination in a machine having a plurality of equi-spaced band saws, a frame mounted relative to the machine and extending transversely of the saws, a plurality of saw guides projecting from the frame, a plurality of hones pivoted to oscillate transversely of the frame on axes substantially bisecting the spacing between the saws, means to effect relative travel of the hones and saws longitudinally of the latter, and means to oscillate the hones to alternately contact adjacent saws.

6. The combination in a sawing machine, driven band saw rollers journaled in the machine, a plurality of spaced saw bands driven by said rolls, a shaft journaled in the machine and extending transversely of the saws, two sets of arms diverging downwardly from the shaft, the first set of arms being adjacent the saws, a frame spanning the saws and carried by said first set of arms, cam pins journaled in the frame and cooperating therewith to oscillate the frame toward and from the saws, a bar carried by the second set of arms and mounted to reciprocate transversely thereof, a series of spaced hones rockingly carried by the frame and bar, and trneans to reciprocate said bar.

7. The combination in a sawing machine, driven saw band rollers journaled in the machine, a plurality of spaced band saws driven by the rollers, a shaft journaled in the machine and extending transversely of the saws, two sets of arms diverging downwardly from the shaft, the first set being journaled on and the second set keyed to said shaft, a frame spanning the saws and carried by said first set of arms, cam pins journaled on the frame and cooperating therewith to oscillate the frame toward and from the saws, a bar carried by the second set of arms and mounted to reciprocate transversely thereof, a series of spaced hones rockingly carried by the frame and bar,

5 and a lever arm mounted to actuate the cams when swung in a vertical arc and to reciprocate the bar when oscillated horizontally.

8. The combination in a sawing machine, driven band rolls mounted in the machine, a plurality of spaced band saws driven by the rolls, a shaft journaled in the machine and extending transversely of the saws, two sets of arms diverging downwardly from the shaft, the first set being journaled on and the second set keyed to the shaft, a frame spanning the saws and carried by the first set of anms, cam pins journaled in the frame cooperating therewith to oscillate the frame toward and from the saws, a bar carried by the second set of arms mounted to reciprocate longitudinally, a series of spaced hones rockingly and longitudinally adjustable in the frame, a bar carried by the second set of arms and rockingly supporting the rear ends of the hones and longitudinally reciprocable, a lever arm pivoted to the frame and connected to rotate the shaft, and a second lever arm mounted to actuate the cams when oscillated vertically and to reciprocate the bar when oscillated horizontally.

9. The combination in a machine having a plurality of equi-spaced band saws, a frame mounted relative to the machine and extending transversely of the saws, a plurality of hones pivoted to oscillate transversely of the frame on axes substantially bisecting the spacing between the saws, means to effect relative travel of the hones and saws longitudinally of the latter, means to oscillate the hones to alternately contact adjacent saws, and means to rotate the hones as they are alternatively oscillated.

No references cited.