US2705510A

US2705510A - Combination upright and cut-off band saw

Info

Publication number: US2705510A
Application number: US304970A
Authority: US
Inventors: Stocke Pius
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-08-18
Filing date: 1952-08-18
Publication date: 1955-04-05
Anticipated expiration: 1972-04-05

Description

A ril 5, 1955 P. STOCKE 2,705,510 COMBINATION UPRIGHT AND CUT-OFF BAND SAW Filed Aug. 18, 1952 N IN VEN TOR.

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April 5, 1955 P. STOCKE COMBINATION UPRIGHT AND CUT-OFF BAND SAW Filed Aug. 18, 1952 3 Sheets-Sheet 5 IN VEN TOR. vs 570cm:

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' N v i ATTORNEYS.

United States Patent COMBFNATIGN UPRIGHT AND CUT-OFF BAND SAW Pius Stocke, Santa Rosa, Caiif.

App'iicatiou August 18, 1952, Serial No. 304,970

Claims. (Cl. 143-47) The present invention relates to improvements in a combination upright and cut-off band saw. it consists of the combinations, constructions, and arrangement or parts, as hereinafter described and claimed.

As the cardinal object of this invention, it is proposed to provide a device of the character described, which may be readily converted from an upright endless band saw to a cut-off saw, and vice versa, thus allowing the saw to be employed for a large variety of uses.

More specifically stated, I mount an endless band saw on a saw-carrying frame, the latter being swingable between upright and lowered downwardly-inclined positions. When arranged upright, the saw coacts with a material-supporting table so as to cut material guided over the latter. However, this saw-carrying frame may be swung into an alternate position so that its blade will serve as a cut-off saw. Accordingly, the single unit may be utilized for many uses in shops, mills and the like.

Another object is to provide a saw unit of the character described, which is simple in construction, durable and efficient for the purpose intended.

Other objects and advantages will appear as the specification continues, and the novel features vill be set forth in the appended claims.

Drawings For a better understanding of my invention, reference should be had to the accompanying drawings, forming part of this application, in which:

Figure 1 is a front elevational view of my combination upright and cut-off band saw, with the saw-carrying frame disposed in upright position;

Figure 2 is a side view thereof in elevation;

Figure 3 (Sheet 2) is a top plan view taken along the plane III-III of Figure 1;

Figure 4 (Sheet 1) is a fragmental view of an adjustable upper band wheel and its mounting, as seen from the vertical plane IVIV of Figure 2;

Figure 5 is a horizontal sectional view taken along the line V-V of Figure 4, showing the adjustment for the upper band wheel;

Figure 6 is a fragmentary sectional view taken along the line VI-Vl of Figure 1, illustrating the clearance between the teeth of the endless band-saw and an idler wheel around which this band saw is trained;

Figure 7 (Sheet 3) is a vertical sectional view of the band sa'w drive wheel, taken along the transverse vertical plane VII-VII of Figure 1;

Figure 8 is an enlarged horizontal sectional view taken along the plane VHL VHI of Figure 2, disclosing an adjustable blade-guide through which the endless band saw passes immediately before the latter engages with the material to be cut;

Figure 9 is a side elevational View of Figure 8;

v Figure 10 is a front elevational view of the same blade-guide, 'as seen from the left of Figure 9;

Figure 11 is a bottom plan view of Figure 9;

Figure 12 is a transverse sectional view taken along the line XII-XII of Figure 11; V

Figure 13 is a view corresponding to Figure 8, but partly in section, and disclosing the blade-guide adjusted into an angular position;

Figure 14 (Sheet 2) is a fragmentary top plan view of the material-supporting table, as observed from the plane XIV-XIV of Figure 1;

2,705,510 Patented Apr. 5, 1955 Figure 15 is a transverse horizontal sectional view taken along the line XV-XV of Figure 14, showing a strip that is removable from the table when the latter is tipped;

Figure 16 is a front elevational view of the device being used as a cut-off band saw at the end of a cutting operation;

Figure 17 is a side elevational view of Figure 16;

Figure 18 is a fragmentary sectional view taken along the plane XVIIIXVIII of Figure 17, showing the bladeguide adjusted for maintaining the saw blade vertical relative to material being cut, but disclosing the saw at the beginning of its cutting operation;

Figure 19 is a fragmentary elevational View of one of the blade'guides, as seen from the inclined plane X[XXIX of Figure 16, the full lines illustrating the saw at the start of a cutting operation and the dotdash lines indicating the saw at the completion of the cutting; and

Figure 20 is a vertical sectional view line XX--XX of Figure 16.

While I have shown only the preferred form of my invention, it should be understood that various changes, or modifications, may be made within the scope of the annexed claims without departing from the scope thereof.

Detailed description In carrying my invention into practice, I provide a main frame indicated generally by A having a sawcarrying frame B swingably mounted thereon. The latter is movable between an upright position, as shown in Figures 1 and 2, into a slightly downwardly-inclined position, as disclosed in Figures 16 and 17. The frame B carries an endless band saw C, which is driven by a motor D.

When the saw-carrying frame B occupies its upright position, the vertical reach 10 of the band saw C passes through a slot 11 fashioned in a material-supporting table E (see Figures 1, 2 and 14). However, when this table is moved into an out-of-tl1e-way position, as shown in Figures 16-17, the frame B may be swung into an inclined position to provide a cut-off band saw, which is adapted for cutting material held in a vise F, the latter being swingably-supported on the main frame A.

In its structural details, the main frame includes a pedestal base 12 having from and

rear standards

14 and 15, respectively, secured thereto so as to rise therefrom. Broadly speaking, the front standard provides a support for the table E and vise F, while the rear standard forms a mounting for the saw-carrying frame B.

As shown in Figure l, the frame B defines a substantially square C in front elevation, defining upper and

lower arms

16 and 17, respectively, which are interconnected by a bar 18. Reinforcing struts 10 may be provided between these arms and bar to strengthen the frame B.

For the purpose of supporting the saw-carrying frame B, a double-swivel G is provided between this frame and the rear standard 15 (see Figures 1. 3, l6 and 17). It includes a horizontal stub shaft 20, which is journalled for turning in a bearing 21 secured to the top of the standard 15. This stub shaft is fastened to a head 22 through which a shaft 23 extends at right angles to the shaft 20 (see Figure 1). In other words, these two shafts define a T. It will be noted that the shaft 23 projects through bearing blocks 24-24, which are fastened to the bar 18 of the saw-carrying frame.

The construction just described will permit the frame B and its endless band saw C to be swung from an upright position, as shown in Figure 1, into a downwardlyinclined position (see Figures 16 and 17). As the frame B is swung about the axis of the shaft 20, it also swings downwardly on the shaft 23, In Figures 16 and 17. a cut-off band saw is provided, with the reach 14] of the saw cutting material held in the vise F.

When the frame B occupies its upright position, the lower arm 17 thereof abuts a stop 25 provided on a horizontal member 26 of the main frame A. Thus, the upright frame B in Figure 2 must be swung in a counterclockwise direction in this view with its stub shaft 20 taken along the rotating in the bearing 21 in order for this frame to reach the position shown in Figures 16 and 17.

Moreover,

brackets

27 and 28 are secured to the head 22 on opposite sides of the shaft 23 (see Figures 1, 3 and 16). The bracket 27 parallels the shaft so as to abut the bar 18 and thus prevent the frame B from swinging away from an observer in Figure 1; however, the other bracket 28 in Figure 16 extends downwardly with respect to theshaft 20 to permit the saw-carrying frame B to dip downwardly into slightly inclined position simultaneously with lowering of the frame B so that the saw reach 10 will cut a piece of material 29 clamped in the vise F (see Figures 3, l6, l7 and 19). Adjustment screws 30 are carried by the bracket 28 to limit downward swinging of the frame B in Figure 16.

When the frame B is disposed in upright position, as in Figures 1, 2 and 14, the saw C extends through the slot 11 of the table B. At this time, the stop 25 and bracket 28 maintain the vertical position of the sawcarrying frame 13.

Referring now to the manner in which the endless band saw C is mounted, it will be observed that the blade of this saw is trained around a drive wheel 31, which is secured to a shaft 32, the latter being journalled in bearing 33 supported on the lower arm 17 of the saw-carrying frame B (see Figures 1, 7 and 17). Furthermore, this saw blade is guided over an idler wheel 34 and a bladetightener wheel 35. Thus, the endless band saw C defines a substantially triangular-shaped outline, as clearly shown in Figure l.

in Figure 6, the band wheel 34 has been disclosed as having a conical-shaped face 34a to provide clearance for the teeth 36 of the saw C. In a like manner, the wheels 31 and have

conical faces

31a and 35a, respectively, to relieve the saw teeth from wear as they pass around these wheels. These conical faces of the three wheels maintain the saw blade in alignment.

The idler wheel'34 is supported on a shaft 37 journalled in a bearing 38, the latter being fixed to the bar 18 of the saw-carrying frame B (see Figures 1 and 17). For the purpose of adjustably mounting the tightening wheel 35, its shaft 39 extends into a crosshead 40, which is arranged for sliding movement in guideways 4141 (see Figures 1, 4, 5 and 17). A threaded rod 42 is held against endwise movement relative to the arm 16 of the saw-carrying frame 13, and is threaded through the crosshead 40. Upon turning the handle 43 on the threaded rod. 42, the crosshcad may be advanced or retracted so as to place the band saw under proper tension.

As previously stated, the endless band saw C is actuated by a motor D. The latter drives a stepped cone pulley 44, which is connected by a belt 45 with a pulley 46 mounted on a countershaft 47 (see Figurm 1-3 and l6l7). This countershaft is provided with a pulley 48, which in turn is connected by a belt 49 with a pulley 50 fixed to the shaft 32. The latter is'fastened to the drive wheel 31 over which the endless band saw C is trained. Thus it will be evident that the saw will be rotated whenever the motor D is operating.

Upon swinging the saw-carrying frame B into the position shown in Figure 16, it is desirable to turn the motor D off automatically when the saw ,C completes its cut through the pieces 29. For this reason bracket 28 is arranged to depress a switch-control handle 52 to open a switch contained in a housing 53. This switch is arranged in conductors leading through

cables

54 and 55 from a source of current 56 to the motor D (see Figure 1). For the purpose of limiting the swinging of the sawcarrying frame B when the bar 18 thereof reaches a horizontal position, the head 22 is provided with a lug 51, which abuts the top of the rear standard 15 when this frame reaches the position shown in Figures 16 and 20.

Assuming that the device has been used as an upright hand saw, as in Figures 1 and 2, it is necessary to move the table E into an out-of-the-way position to clear the lowered frame B, as in Figures 16 and 17, in order to allow the device to be used as a cut-off saw. Also, the vise F must be turned from inoperative position (sec Figurel) into an active position (see Figure 16). This action of moving the table out of the Way is accomplished by adjusting a hinged frame member 57, which is attached by a clamping bolt 58 to the top part of the front standard 14 of the main frame A.

The table E is pivotally secured to the free end of the hinged frame member 57 by a clamping bolt 59 to allow this table to be swung into a position underneath the member 57 when the latter is disposed horizontally, as in Figure 16. This arrangement gives unobstructed access to the vise F, and the table will not interfere with the gripping of relatively long pieces of material 29, such as rods, in the vise.

in order to allow the table E to be swung between the positions shown in Figures 1 and 16, without removing the endless band saw C, the slot 11 is extended to the edge 60 of the table (see Figures 1 and 14). When the device is being used as an upright saw, as in Figure 1, a removable strip 61 is clamped upon recessed shoulders 62 bordering the slot 11, with the upper surface of this strip disposed flush with the top of the table (see Figure 15). For clamping the strip 61 in place, studs 63 are secured thereto so as to extend downwardly through the slot 11, and wing-nuts 64 are threaded onto the lower ends of these studs to bear against the underneath side of the table. As clearly shown in Figure 14, the strip 61 is shorter than the length of the slot 11 for the purpose of leaving a space through which the blade of the band saw may extend.

With respect to the vise F, it includes swingable jaw 65, which is secured to a base 66 by a clamping bolt 67 (see Figures 1, 2, l6 and 17). This base is fastened to the hinged frame member 57 so as to swing therewith. A slidable jaw 68 is carried by the swingable jaw 65 and coacts therewith in gripping the pieces of material 29 therebetween. The jaw 68 is actuated by a threadedshaft 69 and a handle 70.

Referring now to Figure 3, pieces of material 29a may be supported on the table E at an inclination relative to the saw blade, thus allowing these pieces to be cut on an incline, and for other purpose of cutting relatively long pieces that will not pass through the triangular throat of the saw. The latter operation will be described as the specification proceeds.

In Figures 1 and 16 there is disclosed a safety guard 71, which is carried by the lower arm 17 of the frame B. This guard is positioned to prevent the drive wheel 31 from striking the horizontal member 26 as the frame B is swung between the positions shown in Figures 1 and 16.

It is important to maintain the blade of the endless band saw C in a vertical position relative to the pieces of material 29 being out (see Figure 18). For this purpose, there is provided a pair of adjustable blade-guides designated generally at H, which are substantially identical with one another, excepting for the fact that they are made right and left. These saw guides are employed for guiding the saw blade when the device is being used in any position of cutting.

With particular reference to Figures 1-5 and 17, it will be noted that the free ends of the upper and

lower arms

16 and 17, respectively, of the saw-carrying frame 13 are provided with guideways 72 extending toward each other in parallel relation with the saw reach 10. A pair of spindles 73 are mounted in these guideways for adjustment toward and away from one another, and are clamped in adiusted position by set-screws 74 (see Figures 2, 4'

and 5). For holding these spindles against turning in the guideways. keys 73a are inserted into keyways 73b in these spindles, with the keys entering grooves in the guideways (see Figures 4 and 5 1 For the structural details of the blade-guides H reference is made to Figures 8 to 13, inclusive. Figures 8 and 9, the confronting ends of the spindles 73 have bores 75 fashioned therein to rotatably receive stubshafts 76, the latter being held in adjusted position by set-screws 77. The stub-shafts support yoke-shaped brackets 78, which are formed with sockets 79 having blade-guiding bearings 80 rotatably mounted therein. The axes of these sockets and bearings parallel the axes of the spindles 73. but are offset with respect to the latter.

The ends 81 of the yoke-shaped brackets 78 are separated from each other to leave a space through which the blade of the saw C may be introduced into a slot 82 of the blade-guiding bearings 80. The latter may be turned about their axes so that the blade of the saw will be held vertically relative to the work, such as bars 29, as shown in Figures 18. These bearings are secured in adjusted position by set-screws 83, which extend through slots 84 provided in the brackets (see Figures 9 and 13). Both screws 83 project toward the same side of the device (see Figures 1 and 2).

In Figures 9 to 11, inclusive, the bearings 80 are disnew As shown in closed as having L-shaped extensions 85 projecting there from. The legs 85a of these extensions parallel the blade C, and have blade guides 86 mounted on and bearing against opposite sides of this blade to guide the latter.

These guides are anchored to the extension legs 85a by studs 87. Rollers 88 bear against the back 89 of the saw blade (see Figures 9 and 11). These rollers are rotatably connected by journal pins 90 to forked members 91. The latter are provided with bases 92 that are slidably disposed in guideways 93 fashioned in legs 86b of the extensions 85 (see Figures 9, 11 and 12). Setscrews 94 adjustably anchor the bases 92 to the extension legs 8612 so that the rollers 88 may be shifted into proper position to bear against the back 89 of the saw blade.

It is important to maintain the longitudinal centerline of the saw blade in registration with the longitudinal axes of the bearings Sit-80 when the latter are adjusted in the sockets 79-79. Accordingly, the rollers 88 may be adjusted back or forth to meet this requirement. Moreover, saw blades of various widths may be employed by adjusting these rollers.

The forks 91 carry bearings 91a through which the journal pins 90 extend (see Figure 9). These bearings are spaced laterally from the saw blade so that chips cut by the latter will not foul the bearings.

Turning now to Figure 19, the inclined full-line illustration discloses the saw C as resting on the top of the piece of material 29 at the start of the cutting operation as the bar 18 is swung toward a horizontal position, while the dot-dash lines show the position of the saw after this piece of material has been cut. The combined weight of the frame B and the parts supported thereon is sufficient to cause the rollers 88 to depress the saw blade as it cuts through the material 29 clamped in the vise. It will be observed from Figures 1 and 17 that the stub shaft 20 is offset with respect to the midpoint between the

arms

16 and 17, with the motor D and its drive disposed between this shaft and the arm 17. Thus the frame B is substantially counterbalanced.

Summary of operation Assuming that the device is to be utilized as an upright saw, the saw-carrying frame B is-mounted vertically, as shown in Figures 1 and 2, with the reach of the endless band saw C passing through the slot 11 of the table B. At this time, the table is arranged horizontally on the frame member 57, and the clamping bolts 5859 are tightened to provide a firm support for the table. Also, the pair of blade guides H are presented above and below the table E so as to guide the saw C relative to any pieces of material that may be placed on the upper surface of the table for cutting. The table E may be tilted about the clamping bolt 59 to allow angular cuts to be made in the pieces of material.

In order to tension the saw C properly, the handle 43 may be turned for the purpose of raising or lowering the blade-tightening wheel 35. Upon starting the electric motor D, the vertical reach 10 of the saw will be advanced downwardly, resulting in cutting the pieces of material. From Figure 1, it will be obvious that the triangular arrangement of the saw C will provide a wide throat through which material may be inserted for cutting operations. At this time, the vise F is arranged in an outof-way position.

When the device is being used as an upright saw, the blade-guiding bearings 80--80 may be adjusted in their sockets 79--79 so that the portion of the blade C between the spindles 7373 will extend at right angles relative to the piece of material 29a, which is disposed in angular position on the table E (see Figure 3). Thus relatively long pieces 29a may be moved against the saw blade for cutting, even though such pieces could not be moved through the triangular throat of the saw.

When converting the device into a cut-off band saw, the wing nuts 64 are loosened, and thereafter the strip 61 may be withdrawn from the table. This will leave the slot 11 unobstructed, whereby the table E and the hinged frame member 57 may be swung into the position shown in Figure 16.

During the lowering of the frame member 57, the vise F is moved into active position, as shown in Figures 16 and 17. Now the operator grasps the upper arm 16 of the saw-carrying frame B, and swings the latter and its shaft in a counterclockwise direction in Figure 2 until the bar 18 of this frame is disposed horizontally. As the frame 1s thus moved, it will at the same time swing about the shaft 23 into the inclined position shown in Figures 16 and 17.

Prior to lowering the frame B, pieces of material 29 to be cut are clamped between the coacting jaws and 68 of the vise F. These pieces will extend underneath the reach 10 of the saw blade when the frame B is lowered. At any suitable time, the blade-guiding bearings are adjusted angularly in the yoke-shaped brackets 78 so that the saw blade will be positioned vertically relative to the pieces 29, or other material to be cut. The setscrews 83 are tightened for holding the bearings 80 in adjusted position.

Upon setting the motor D in operation, the saw C will be fed downwardly through the material 29 now clamped in the vise. As the bar 18 of the saw frame approaches a horizontal position, the bracket 28 will gradually depress the switch handle 52 so the motor D will be stopped when the saw completes its cut.

1 claim:

1. In a combination upright and cut-off band saw of the character described: a main frame; a saw-carrying frame supported on the main frame by a double-swivel connection arranged therebetween; this connection including a substantially horizontally-disposed shaft on which the saw-carrying frame is mounted for swinging between upright and lowered positions; the double-swivel connection further including a second shaft arranged substantially at right angles to the first shaft, and having the saw-carrying frame journalled thereon for swinging into a downwardly-inclined position about the second shaft; an endless band saw supported on the saw-carrying frame to swing therewith; means for driving the band saw; a hinged frame swingably secured to the main frame; a table mounted on the hinged frame for supporting pieces of material in operative relation with the band saw for cutting when the saw-carrying frame is disposed in upright position; and releasable means mounting the hinged frame for movement to carry the table into an out-of-theway position to clear the saw-carrying frame when the latter is swung into its lowered position.

2. In a combination upright and cut-off band saw of the character described: a main frame, including a standard and a horizontal member provided with a stop thereon; a substantially horizontally-disposed first-named shaft journalled on the standard for turning movement; said shaft having a head fastened thereto through which a second shaft extends substantially at right angles relative to the first shaft; a swingable saw frame provided with upper and lower arms, which are interconnected by a bar; a power-driven endless band saw supported by the bar and arms to swing therewith; bearing blocks fastened to said bar, and being rotatable on said second shaft; the saw frame being swingable about the axis of the first shaft from an upright position, in which said bar is disposed vertically, into a lowered position wherein said bar is presented substantially horizontally; the saw frame, as it is thus lowered, being simultaneously swingable about the second shaft to move said arms into a downwardlyinclined position; said stop abutting one side of the lower arm when the saw frame is arranged upright; and a bracket secured to said head to abut said bar on the opposing side of the saw frame from that of said stop, when this frame is disposed upright, with this bracket and stop coacting to hold the saw frame from swinging in either direction about said second shaft.

3. In a combination upright and cut-off band saw of the character described: a main frame, including a standard and a horizontal member provided with a stop thereon; a substantially horizontally-disposed first-named shaft journalled on the standard for turning movement; said shaft having a head fastened thereto through which a second shaft extends substantially at right angles relative to the first shaft; a swingable saw frame provided with upper and lower arms, which are interconnected by a bar; a power-driven endless band saw supported by the bar and arms to swing therewith; bearing blocks fastened to said bar, and being rotatable on said second shaft; the saw frame being swingable about the axis of the first shaft from an upright position, in which said bar is disposed vertically, into a lowered position wherein said bar is presented substantially horizontally; the saw frame, as it is thus lowered, being simultaneously swingable about the second shaft to move said arms into a downweirdly-inclined position; said step abutting one side of the lower arm when the saw frame is arranged upright; a bracket secured to said head to abut said bar on the opposing side of the saw frame from that of said stop, when this frame is disposed upright, with this bracket and stop coacting to hold the saw frame from swinging in either direction about said second shaft; and a second bracket secured to said head, and being mounted to abut said bar to limit downward movement of said arms as the saw frame is moved into lowered position about the axis of said first shaft.

4. In a combination upright and cut-off band saw of the character described: a main frame, including a standard and a horizontal member provided with a stop thereon; a substantially horizontally-disposed first-named shaft journalled on the standard for turning movement;

said shaft having a head fastened thereto through which a second shaft extends substantially at right angles relative to'the first shaft; a swingable saw frame provided with upper and lower arms, which are interconnected by I downwardly-inclined position; said stop abutting one side of the lower arm when the saw frame is arranged upright; a bracket secured to said head to abut said bar on the opposing side of the saw frame from that of said stop, when this frame is disposed upright, with this bracket and stop coacting to hold the saw frame from swinging in either direction about said second shaft; the lower arm of the saw frame having a drive wheel supported thereon, around which the band saw is trained; and a safety guard carried by this arm, and being positioned to prevent the drive wheel from striking said horizontal member of the main frame when the saw frame is lowered.

5. In a combination upright and cut-off band saw of the character described: a main frame, including a standard; a substantially horizontally-disposed first-named shaft journalled on the standard for turning movement; said shaft having a' head fastened thereto through which a second'shaft extends substantially at right angles relative to the first shaft; a swingable saw frame provided with upper and lower arms, which are interconnected by a bar; a power-driven endless band saw supported by the bar and arms to swing therewith; bearing blocks fastened to said bar, and being rotatable on said second shaft; the saw frame being swingable about the axis of the first shaft from an upright position, in which said bar is disposed vertically, into a lowered position wherein said bar is presented substantially horizontally; the saw frame, as it is thus lowered, being simultaneously swingable about the second shaft to move said arms into a downwardly-inclined position; a table for supporting pieces of material in operative relation with the band saw for cutting when the saw-carrying frame is disposed in upright position; this table having a slot extending thereinto from an edge thereof; the band saw having a vertical reach extending through this slot when the sawcarrying frame is arranged upright; a strip detachably connected to the table to cover a portion of the slot; this strip having a surface disposed flush with an upper surface of the table; and means mounting this table for movement into an out-of-the-way position to clear the saw-carrying frame when the strip is removed and this frame is swung until its bar is disposed substantially in a horizontal position, and the slot extending in a direction so that said reach of the saw will pass out of the slot as the table is thus moved.

References Cited in the file of this patent UNITED STATES PATENTS 950,638 Nolan et a1. Mar. 1, 1910 1,576,051 Jull Mar. 9, 1926 1,684,815 Wells H Sept. 18, 1928 2,601,095 Crane June 17, 1952 FOREIGN PATENTS 237,325 Germany Aug. 5, 1911 501,903 Germany July 7, 1930 252,840 Switzerland Nov. 1, 1948