US2078342A - Scouring machine - Google Patents

Description

April 27, 1937.

E. J. RAY

SCOURING MACHINE Filed July 6, 1935 C5 Sheets-Sheet 1 April 27, 1937. f E. J. RAY

* sCoURING MACHINE Filed July 6, 1955 :s 'sheets-sheet 2 /NVEA/ m/L April 27, 1937. v E RAYA Y 2,078,342

SCOURING MACHINE Fil'ed Ju1y 6, 1935 5 Sheets-Sheet 5 VEN mi I fg@ Patented pr. 27, 1937 UNITED STATES@ PATENT OFFICE Eugene). Ray, Beverly, Mass.,A assignor to United Shoe Machinery Corporation, Paterson, N. J., a

corporation of vvNewJersey Application July 6, 1935,` Serial' No. 30,189

sv claims. `(ol. 51-81) ing tothe operative position .the tool next suc-v This invention 'relates to machines having a plurality of tools in which it is necessary `to bring the tools in vturn to a common operating-.position. It is illustrated as embodied in a machine `for scouring the heels of shoes.

The heel scouring operation is performed in a plurality (generallytwo) ofsteps, on scouring wheels of progressively increasing neness of grade. When the shoe comes to the machine its lollheel, which has been .roughly trimmed to shape, is first treated on a coarse scouring wheel, and later on a kne scouring Wheel. The most common way of dealing with the problem is to mount such wheelssideby sideonthe same shaft, which fhas the disadvantage .that the operator is obliged to change his position on the iioor as he shifts from one tool to the other. This is vtime wasting and Wearisome. .It has been suggested that this' procedure can .beimproved by mounting all the tools `so that they can be shifted one after the other toa common 'operating position, and itis with this :type of machine that the present invention .is concerned.

4An important problem in the Luse of all machines which remove .material from `a Work piece is the disposal ofthe material removed. In the case of scouring and trimming machines, such material is removed by .a suction pipe in cooper-Y ation -with .a dust hood surrounding vthe tool. It

is .a principal object `of :the present invention'to improve the `waste material collecting and removing apparatus ofsuch machines, While preserving the advantages of the commonA operative position. of the tools.

3,5 v`Accordingly, I -have provided a tool :carrier having a plurality of continuously driven tools mounted thereon. and arranged to bemoved into a common operating position by the operator, with a dust hood for each tool `arranged to cooperate with .a common suction apparatus at rthe common operative position, Yand so constructed that the hoods fof `the :tools not in `the operative position guard their tools from contact with a work piece being treated by the tool in the operative position. 'I'hus I `:avoid loss ,of time in speeding upa tool newly brought to the operative position, and avoid'damage tothe work from a continuously driven though inoperative tool inthe neighborhoodof the operating tool. l In accordance with another feature ofthe invention .I have` provided .a .non-repeating mech-V anism ,for the machine. The shift `of the tools isconvenientlyAtreadleactuated, and is very rapid so .thatfan ,operator Awho .is a ylittle .slow in releas- 1 ing the treadle would fail in his purpose `of mov.

ceeding the one he had .been using, ifhe had not such arsafeguard against overthrowing theftools.

Preferably, the tool .carrier is normally latchedk tohold one of the tools at the operative position and is positively driven, when unlatched, by a clutclnwhich, 'as'well'as thelatch, is controlled bythe vtreadle, and which, with the latch, is releasedfby the non-repeating mechanism, in properV timed relation to the tool that is approaching the operative position.

These and other features of the invention comprising certain combinations Vand arrangements of parts will be apparent from ther following description of a preferred embodiment of the invention shown in the drawings, in which' Fig. 1 is a side elevation of the machine;

Fig. 2 is afront elevation of the machine;

Figs. 3, 4 and 5 are sectional elevations on the corresponding section lines shown in Fig. 2; and

Fig. 6 is a detail showing the treatment of a heel by a scouring wheel in the machine.

The machine frame I 0 carries a horizontal cylindrical bearing I2 at its upper end, in which is rotatably mounted a hollow cylinder I4, which is normally motionless, its rotation occurringY only when the operator trips it. The cylinder I4 carries inside it, near its ends, the ball bearings I6,A I8, in which runs the main operating shaft 2U, with its drive pulley 22 on one end.

The cylinder I4, at its end remote from the pulley 22, carries a large casing 24 in which are mounted shafts 26, 28 carrying the scouring Wheels 30, 32, respectively. These are driven by pinions 34 meshing with a pinion 36 on the end of the shaft 20, all of which pinions are contained within the casing 24. The casing 24 carries on its rear face two oppositely outwardly projecting lugs 38, 40 which are arranged to fall, in alternation, on a shelf 42 mounted on a bell-crank lever 44 pivoted at 46 lon the frame I0. The shelf 42 is cushioned by a spring-pressed member 43. A spring 41 holds the lever 44 against a stop 45 inthe position shown in Fig. 1. The lever 44 carries a spring-pressed latch 48 resting. on top of the lu-g 38 to hold it against rising from the shelfk 42.

The other arm 50 of the lever 44 vrests on an abutment 52 pivoted at 54 on a'rod 56 sliding vertically in a block 58 on therframe I0. The rod 56 is held down by .a spring 59.

The cylinder I4, at its end near the pulleyA 22,4

carries three studs 60, onwhich is loosely mounted a clutch plate 62. which is heldtoward the. cylinder I4 .by springs`64 (Fig. 2) under the heads of the studs 60. When the plate 62 is forced to the right in Fig. 2, it comes into frictional contact with the rim of the pulley 22, which then tends to drive the cylinder I4, casing 24 and its carried parts, to interchange the scouring Wheels 30, 32.

Thismovement is instituted by a treadle 66, which pulls down on a rod 88, causing a rock lever 18 to rise and push up the rod 5B, whereupon the abutment 52 tips the lever 44 to release the lug 38. At the same time a roll 12 mounted on the arm 58 of the lever 44, runs up on a camA surface 14 on a yoke 18, pivoted at 18, 18 on the frame lll. The yoke 18 carries, beyond its pivots 18, two rolls 89 which press against the plate 62 when the cam surface 14"is pushed back, and thereby eiect the frictional driving contact, mentioned above, with the pulley rim, causing the casing 24 and the scouring wheels to revolve.` The plate 62 carries two lugs 82, 84 so ar# ranged that, prior to the execution of a 180 turn by the casing 24, one of them will strike a finger on the pivoted'abutment 52 which has been thrown into the path of movement of the lugs 82, 84 by the raising of the abutment 52 (see the dotted line showing in Fig. 5) and throw the abutment clockwise in Fig. 1, releasing the end of the arm 58 and enabling the spring 41 to pull the lever 44 to its Fig. 1 position, permitting release of the clutch 22, 62 by means of the spring 64, when the lug 38 or 40 which next comes along will strike the shelf 42 and stop the casing 24 at the end of the 180o revolution, even though the operator has not released the treadle. Thus the tool shifting operation of the machine cannot repeat.

When the treadle is released the rod 55 drops and the abutment 52 slips under the end of the arm 58 again, asin Fig. l.

Carried by the casing 24 is an integral structure comprising a pair of dust hoods 86 and 81 which are associated with the scouring Wheels 30 and 32 respectively. Each of the hoods 86 and 81 partially encloses the scouring wheel with which it is associated, covering the major portion of the periphery and sides of the scouring wheel but having an opening at which the work piece may be presented to the scouring wheel. This opening serves also as a draft inlet to receive dust-laden air from the vicinity Vof the work. The construction of the hoods 86, 81is the same.' Each has an end portion 88 in which is formed a discharge opening adapted to register with an inlet opening in the upper portion 89 of a stationary dust chute or conduit 9D. The inlet opening of each hood is preferably continuous with the discharge opening ofV that hood, as shown in Fig. 2. The ends 88 terminate in an imaginary cylindrical surface which is coaxial with the shaft 28 and with the axis of rotation of the cylinder I4, and the portion 89 of the conduit 98 is complemental to the ends 88. Only a minimum clearance is necessary, therefore, to enable the ends 88 to be brought into register with the portion 89. The interiors of the dust hoods 88 and 81 are separated by a partition 9i which constitutes a continuation of the rear walll of each dust hood, so that there'is no communication between the hoods.

The conduit 99 has a Ydischarge end 92 which is adapted to be connected toa suction system. In addition to the inlet opening in the'upper portion 89 which communicates with the respective dust hoods, the conduit 90 has a widely ared hopper-like space 93 bounded by a rim 93* and opening into the room, beneath the locality at which the scouring operation is performed upon a shoe |84. A partition 931/2 divides the conduit 90 into two passageways 94 and 98 from a point adjacent to the discharge end 92 and leading respectively to the inlet opening in the portion 89 and to the flared opening 93. 'I'he size and shape of the opening 93` arel such asto enable it to catch practically all of the dustwhich drops downwardly from the shoe 184,' and also to provide space for manipulation of the shoe when in the position indicated in Fig. 6, that is, when the toe` of .the shoe is pointed downwardly and toward the left, as viewed in Fig. 1. In order to speed up the draft and' thereby to avoid the accumulation of clustV on the walls of the conduit, the'wall'of theV conduit 98 is shaped to contract `the hopper-likespace 93 as the draft progresses from the rim 93* to the discharge opening 92.

Such contraction assumes the form of a relatively narrow slot |00 which iaresv out to therear into the passage 98.*. ,i 7.1: r1 As one or the other of the scouring wheels operates upon the shoe |84, thescouring wheel, which rotates in the direction indicatedk by the arrows on Fig. 1, .createsV a strong peripheral draft. This draft` entrains a considerable amount of the dust resulting from the scouring operation, and carries this dust into the opening 93* and into the inlet opening ofthe hood belowA the wheel, the dust-laden air being lthence drawn by suction through the conduit 98. The abovementioned peripheral draft tends-to carryfa portion of entrained dust Icompletely -around Athe wheel, but the current of incoming air which en-v ters the hood above the Vwheel strips olf such dust and draws it down throughxthevback ofthe hood and into the passageway 94.' i

As previously stated, the interiors'of'the hoods Y are separated from each other bythe partition 9 I.

The hood associated with the f scouring-wheel which is not in use is .therefore shut off from the suction system, and no draft'is Wasted.'l It will be noted, however, as shown in Fig. 1, thatthe two dust hoods are symmetrical with respect to the axis of the shaft 20, and the exposedv portion of the Wheel which is not in use will therefore be directed away from the operator. The hood assoi ciated with the Wheel which is not in use will therefore function as a guard for that wheel, preventing the forepart of a shoewhich is being scoured from being damaged by accidental contact withthat wheel. y

Having described my invention, what I claim as new and desire to secure byLettersPatent of the United States is: I

1. In a machine of the' class described, a -tool holder, a plurality of continuously actuated rotary abrasive tools mounted on parallel axes on said holder, said holder being constructed and arranged to move the said abrasive tools insuccession to a common operative position, and a dust hood for each of said abrasive tools mounted on the tool holder, said hoods Vbeing open on the operative sides of the abrasive tools and closed on the opposite sides of the-tools, the open side of that hood which is in operative position and the closed side of. the hood next adjacentV thereto being located on'the same side ofthe' plane definedv by the vaxes of the tools in the two last-mentioned hoods, whereby that dust hood associated with said nextadjacent tool serves asa guard for that tool and precludes contact between V`it and a' work piece being treated bythe tool that is inoperativepOstion. -f; 'Y w -1 2. In a machine of the class described, a revolving tool holder, a plurality of rotating abrasive tools mounted on parallel shafts on said holder, said holder being constructed and arranged to revolve the said abrasive tools in succession to a common operative position, a dust hood for each of said abrasive tools mounted on the revolving tool holder, each of said hoods being open on the leading side of its abrasive tool and closed on the following side of thetool as the tools are revolved by the holder, the closed portion of each hood being varranged to envelop its associated tool over substantially that entire portion thereof Vwhich lies to one side of a plane passing through the axis of rotation of the tool and through the axis of rotation of the next adjacent tool, whereby that dust hood associated with a tool not in operative position serves as a guard Yfor that tool and precludes contact between it and a work piece being treated by the tool that is in operative position, means actuatable by the operator to cause the tool holder to revolve the abrasive tools, and automatic means for stopping the revolution when the tool next to that which was in the said operative position before said actuation has come to the operative position.

3. In a machine of the class described, a revolving tool holder, a plurality of continuously actuated abrasive tools mounted on said-holder, said holder being constructed and arranged to revolve the said abrasive tools in succession to a common operative position, a dust hood for each of said abrasive tools mounted on the revolving tool holder, said hoods being open on the operative sides of the abrasive tools and closed on the opposite sides of the tools and having their open sides facing the same way around the holder, whereby that dust hood associated with a tool not in operative position serves as a guard for that tool and precludes contact between it and a work piece being treated by the tool that is in operative position, each of said dust hoods having also a discharge opening, and a suction pipe having a receiving opening arranged to register with the said discharge openings in turn as the tools associated with the said openings come, in turn, to the said operative position. f

4. In a machine of the class descrlbed,a revolving tool holder, a plurality of tools angularly spaced around said holder, said holder being constructed and arranged to revolve said tools, in turn, to a common operative position, a pulley for driving said tools, a friction device between the pulley and the tool holder for revolving the tool holder, said friction device being actuatable by the operator, automatic means for putting the friction device out of operation when the tool holder has revolved through the angle existing between one tool and the next, and means for holding the tool holder with one of the tools in the operative position, said holding means being released in yconnection with the actuation of the friction device by the operator. Y

5. In a machine of the class described, a, revolving tool holder, a plurality of tools spaced circularly on said holder, a set of stop members on the holder arranged in like relation to the tools respectively, a latch on the machine frame arranged to cooperate with all the stop members in turn to hold the tool holder against revolving in either direction, and to hold the tools in turn in a common operative position, a clutch located between the tool holder and the main drive of the machine for revolving the tool holder when the clutch is engaged, manually-operated means for tripping the latch and the clutch, and a second set of stop members arranged to free the latch and the clutch before the revolving tool holder has advanced to the common operative position that tool which next follows the tool which was in the operative position when the latch and clutch were tripped, whereby repetition of the revolving of the tool holder due to a single actuation by the operator is prevented. Y

6. In a heel scouring machine, a plurality'` of scouring wheels, a casing carrying said wheels and arrangedto revolve them in turn about an axis to a common operative station, said casing comprising dust hoods covering the inoperative sides of the `wheels and having discharge'openings lying substantially in a cylindrical surface around the said axis of revolution, and a suction dust remover having a widely flared end comprising two channels, one of which has an end registering with the said openings of the dust hoods,

respectively, when the wheels appertaining to the hoods are in operative position, and the otherl of which channels opens out into a flared hopper the bottom of which communicates with the suction dust remover through a tapering throat, and through a narrow slot communicating with the throat, said hopper lying beneath a shoe being applied to a wheel in operative position.

7. A suction draft device comprising a plurality of draft hoods, supporting meansyfor said hoods constructed and arranged to enable said hoods to be brought successively into a common operating position, and a conduithaving a discharge end adapted for connection to a suction draft system and `having a receiving openingadapted to communicate successively with each of said draft hoods when the hoods are brought one by one into said operative position, said conduit having also a receiving orifice which is open to the atmosphere and which cooperates with the hood occupying the operative position in directing a suction draft.

8. An abrading machine comprising a plurality of abrading tools, a draft hood associated with each of said tools, supporting means constructed and arranged to enable each of said tools and its associated hood to be brought successively into a common operating position, and a conduit having a discharge end adapted for connection to a suction draft system and having a receiving opening adapted to communicate successively with each of said draft hoods when the hoods are brought one by one into said operative position, said conduit having also a draft receiving orice positioned below the abrading tool which occupies the operative position, which orifice cooperates with the hood associated with that tool in removing dust-laden air from the vicinity of the tool.

EUGENE' J. RAY.

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