US1314834A - Box-stuff-trimming mechanism - Google Patents

Description

G. A. SMITH.

BOX STUFF TRIMMING MECHANISM.

APPLICATION FILED MN. I3. 1917- Paltentedsept' 2,

2 SHEETS-SHEEY I.

ATTORNEYS e. A. SMITH. BOX STUFF TRIM MING MECHANISM. APPLICATION FILED JAN. 18. I911.

1,314,834. Patented Sept. 2,191

2 SHEETS-SHEET 2- y ,2 flopped 6y pawl 00- nay/by mdde ard/rmry Fuis/ \S'Ian'dard cur r0 HERE Q a [8G I? nid lr. [ECtJJI/I FOR I .mxramvmo ear: ,8 I H q' flaw/lubed i0 ol/ow for ex!!! m/I- Illode. nan; a, 0 [not lNvENToR 4 0 I? 60 7'96 1 2 11- 8 7 5 BY M ATTORNEY-f TIIE COLUMBIA PLANOORAPII 60., WASHINGTON. D. C.

GEORGE ANDREWS SMITH, OF SOUTH HILL, VIRGINIA.

BOX-STUFF-TRIMMING- MECHANISM.

Specification of Letters Patent.

Application filed January 18, 1917. Serial No. 143,153.

ing is a specification.

In the manufacture of box stuff, or what is termed in the trade shooks, after the boards are cut to thedesired predetermined widths, it. is usual topile the different width boards or shooks into separate stacks, and

in the ordinary way of finally edge trimming thesaid boards, the matcher head or adjustable cutterof the planing machine is manually .set tosuitithe requirements of the particular stack of boards to be worked,

for example, if the boards in the particular stack to be worked are say four inches or more. wide the matcher or cutter head is set accordingly.

In handling lumber in stacks as stated, and. particularly when such lumber is to be cut up to provide shooks or box stuff, in stacking the boards, different widths of boards are frequently placed in the same tstackand hence in running wider boards than the predetermined size for which the planer is set, a needless waste of material occurs.

Mechanical devices have been provided :(see for example Patent No. 918,60 granted tome under date of April 20, 1908) that are set inoperative position and controlled by the board being operated on, which automaticallyshiftthe inatcher or cutter head or heads to the desired predetermined positions, or in other words, if a board, say 3%- inches wide is passing to the shiftable cutter head, the latter is automatically set for edge trimming boards'of that particular width and when the boards are, say 3% inches .wide, the cutter :head is correspondingly set.

In the manufacture of certain kinds of boxes, those made up in standard sizes, and Whose sides, ends, bottoms and top sections are made up from a combination of shooks of different widths, for example, 3%, 39;, ll and 4?; inches more or less, mechanical nailers are utilized for framing up and nailing the box sections, and in the use of such mechanical nailers, it is necessary that the several box sections,be positively uniform to meet the requirements OfSUClLJUUllHg' machines, and by reason of the saidrequire ments of mechanical nailers, it is necessary, when cutting up the rough lumber ;into shooks of different, standard widths that they be sufficiently wider than the standard size to allow for a final trinnning of the edge or edges thereof without reducing the said boards or shooks below the said standard widths, for example, to allow for ,the final trimming, the boards should be.cut about 1; inch wider thanthe standard width.

In my Patent No. 1,204,512, the edge trimming mechanism which embodiesfthe same general characteristics of the trimming mechanism shown inmy Patent No. 918,604, before referred to, also provides for a final orcresetting of the cutter devices after they have been ,initially set by the board to be trimmed, for cutting off the extra or surplus width portion of the board.

In both machines constructed asoutlined and claimedin my two patents hereinbefore mentioned, the edge trinnning or planing mechanismis automatically adjustedor set to the. required operative positions by ,the different width boardsas they are entered into the machines or being worked on.: This method of edge trimming boxshooks, I have found very practical but not fully meeting allthat is desired in finishing up box shocks, forrthe reasonthat the means automatically set in action by the shooks to beworked are more or less complicated, are liable to get out of operative condition and require careful 21113811111011 1n assembllng and, for

.1 maintaining them at the proper operative adjustments.

My present invention, whichprimarily has for its object to,provide .an improved means for edge trimming box.b0ards,-also seeks to provide a machine of the general character stated, in which the operating mechanism" is so combined and arranged whereby-the objections noted in the use of machines in which the planingdevices are adjusted by the board being trimmed, is positively overcome and in which planing or cutting mechanism remains in a rela- Patented Sept. 2,1919.

tively stationary.position, with respectto the set thereof, and in which during'the 35 V g and shifting means, or in other words, should operation thereof, the board is bodily moved edgewise to the cutting mechanism as the ,said cutting mechanism remains in a fixed certain improved attachments adapted for i forward feed for removing the extra inch position to the board to be trimmed, during the operation of the trimming.

. Another object of my invention is to provide an improved planing mechanism for edge trimming box boards of. standard widths, in which is included a means for holding up the board to be edge trimmed to the planer or. cutter devices and in which the board holdingmeans is such that no being readily applied to the standard types of rotary cutting disk jointing machines, and which includes manually controlled means for flatwise sustaining the board or shook to be trimmed, edgewise facing the rotary cutting disk, and a rack .and latch mechanism, also hand controlled, the set of which for determining the edgewise approach of the board to the cutting disk is governed by the condition of the board; edge to be.

trimmed, visual to the operator as he places the boardin position on the board holding the edge of the board showdefective portions, requiring more than the minimum surplus, the operator by manipulating the latch that engages the rack canfefl'ect a predetermined forward edgewise feed of the board to the cutting disk so as to provide for removingthe initial%, 2%, or% inches of the edge worked on and thereby, no matterhow serious the defectin the board edge of an initial standard size of board, a perfeet board of a proper standard width is provided. With other objects in view that will be hereinafter stated, my present invention is an improved box stuff trimming machine k that embodies the'peculiar construction and novel'combinations ofthe. parts to be first described in detail, specifically pointed out in the appended claim and illustrated in the V accompanying drawings, in which:

' Figure 1 is a perspective v1ew of a duplex type of box edge trimming machinethat embodies my invention.

Fig. 2 is a face view of the lowerhalfof a rotary cutting disk, and my improved attachments in cooperative relation therewith Fig. 3' is a top-plan view of the parts 7 shown in Fig. 2, the shiftable board holder being fed to the planing dc being shown at the outermostpos'ition and a board with a defective edge shown held thereon.

Fig. l is a cross sectiontaken'substantially on the line M on Fig. 3 and the board being shown in position for being ad-.

stop detent about to be released to move into engagement with the selected stop notch for limiting the edgewise feed of the board to the cutting disk V Fig. 5 is a detail end view'that illustrates the rack and gear connections that slidably adjust the board holder 2 Fig. 6 is a detail view ofthe rack andde vancedtoward the rotary cutterdisk and the V tent devices that controlthe selected or. pre

determined edgewise feedof the boards to be trimmed. 1

Fig. 7 is a diagram of a boardto be trimmed to a standard size andhaving a de fective edgethat extends back beyond the surplus width on the edge to be trimmed.

Fig. 8 is a similar diagram that illustrates the amount ofboard edge that needs to be trimmed off to bring the defective board down to a next standard width.

Fig. 9 is a detail View of the rack and def tent devices, the pawl beingshown in position" for stopping the, forward feed ofthe board. i

Figs. '10 and 10 are plan views that illustrate a modified arrangement of the stops on the board projecting or pusher frame.

Since in practice it is, usual togbuild jointer'machines with a cutting disk ateach end of a driven shaft and provide a cooper ative board holding means for each cutting disk, I have illustrated my invention as applied to each of the opposltely disposed cutting disks, as shown in Fig. 1, it being'understood that the following detailed dcf scription of the operating parts apply to the board edge trimming mechanism at one side only. 7 7

Inthe drawings, 1 designates the main framing of a box board jointing machine, in the oppositely disposed upright portions 22 of which is journaled a'horizontal shaft 3 upon each end of which is mounted a rotary disk cutter 4i, said cutters being located outside of the dust and shavings blower casings 55, the said parts being of no part of my present invention.

77-designate a pair of oppositely dis- .a well known construction and form 2967" se" V posed brackets that project from one end of the main frame and 8 denotes what I term a shearing bar or chip cutter whose o a site ends are fixedly mounted on the inner 7 top surfaces of the brackets 77, whereby to provide for setting thesaid bar 8 up .close' to the face of the cutting disk and provide a solid base bearing for the inner I edge of the board to be trimmed.

80 designates a pendent yoke member that is fixedly. attached to. or integral with the 'bar 8. to which. is fixedly .connected eny. .Qut-

, wardly extended,horizontahbar ,9,; the puron the side arms of the U-shaped portion 12 of the cross bar 10 and the saidshaft carries coggears 1313 at the opposite ends that are held in mesh withthe cog racks 71-71 on the brackets 77.

vl l designates the hand wheel on one end of the shaft and 14:v a collar that is secured upon the said shaft between the U-shaped portion 12 of the frame 10 to hold thelshaft against longitudinal displacements.

By referring to Fig. 2,. it will be noticed that the top of the crossbar 10 and the. upper face of the shearingbar 8 are in the same plane and the said surfacesform the bearing for the boards to be trimmed, that edgeof the board to be trimmed resting on the bar 8 as it is being engaged by the planer 1 knives w of therotary cutting disk.

Adjustable stops '15 are mounted onthe cross bar 10 against which the larger edge of the board to be trimmed isset when' it is placed in position for being fed upto the planer devices.

By reason of the cooperative arrangement of the parts so far described, it is :obvious that the board projecting frame can be conveniently slid back and-forth, relatively to the cutter disk, by properly mani ulating the hand wheel on th'e shaft 11, t e 'rota- I tion of which, in either direction, through the gear connections with the rack 70 on the brackets 7-7 slides the frame 10 in either desired direction, and by reason of such convenient means of setting the frame 10, it is not necessary to stack the different standard sizes of the boards preparatory to putting them in position to be trimmed, since in picking up the boards and placing the same in position, the operator manipulating the shaft hand wheel, sets, the frame 10 to suit the width of board picked at random from the board pack.

The advantages of being able to quickly adjust the board projectlng frame 10 to suit the width of the board as stated is apparent, since it avoids the more or less expensive means heretofore provided for as sorting and stacking necessary when finishing up shooks. As before noted, the requirements in the manufacture of standard sizes, of shocks" providesfor aperfect Lassen blage of the boards whenworked up into boxes of, standard sizes andmakes it.necessary to leave asurplus width ofhoard overthe standard widthsto allow for-finishing. up the shook edges after reducinguthem below the desired standard sizes.

:Inmy present invention, I employ a simple. rack and pawl mechanism for controh ling the trimming ,off of the said surplus or trimming width and also regulatingthe edgewise feed of the. board to'.tl1e cutting disk to take care ofboards having defective edges, orin other words, boards having knotlholes, notches or chip portions of such proportions that they extend inwardly beyond the surplus edge allowed for trimming.

The rack and pawl mechanism best shown in detail in Fig. 5, comprises the bar 9 here.

tofore referred to thatprojects horizontally forward from the pe'ndentyoke portion 80 on the shearing bar 8 and which, as shown,

is located in line with the U-shaped portion of the frame 10 and the said bar 9. has amoved outwardly in position for receiving a new. board, the detent pawl 18.slips over the ratchet teeth 17.

At this point, it should be stated that the relative arrangement of the 'earmecham'sm for shiftingthe frame 10, the pawl 18 and the ratchet teeth' 17, is such that normally the heel 18 ofthe pawl .18 sets back from the locking edge 17" of the ratchet teeth on which it-rests, a distance of i an inch to allow-for the required forwardfeed of the board edge when trimming off the surplus inch width, to thereby reduce the board width to the proper standard size, or in other words, if the board bein worked on is 3% inches wide, after being edge trimmed it will be of such width.

Another and advantageous feature developed in providing the rack and paw] mechanism shown, is should the edge of a board of a standard width, say 3%} inches wide, be defective, it at once becomes apparent to the operator when he places the ard in position for being trimmed, the operator can conveniently provide for trimming oflz the defective edge and to bring the defective board down to the standard size next below that to which it was originally cut.

To make this clear, attention is called to Fig. 8 which diagrammatically shows a 7 board of say 3% inches wide "with the surplus,

edge portion indicated by 3 and with defective portions designated wthat extend inwardly beyond the edge portion 3 'lVhen placing aboard,such as indicated, in position, the operator notices that-the defects extend beyond the trimming line y and as he feedsthe boardforwar'd, hetrips the pawl 18 out of engagement with the "ratchet teeth with which it was held and holds it out until it passes over the next forward tooth and in releasing it, the-spring throws the said pawl1 8 into the said next forward tooth to provide for an extra 9;

*- inch edgewise projection of the board to the cutting disk and thereby provides for trim-' ming the board with the finished boardto a 3 inch width.-

The advantages in taking care ofthe defeetive edge boards inithe manner stated is 2 5lower standard width; 7

apparent to those skilled inthe art to which my invention relates, in that it saves the time in throwing aside a defective board and handling it for a resaw to reduce it to a My present meansforshan dlingand edge trimming box boards saves asserting the diflerent widths, facilitates the trimming operations, and avoidsthe necessity-ofmore or' less complicated 1mechanism for 7 setting:

the planer or matcher head. Among other-advantages in thepractieal application of-mywpresent means for trim-- ming board edges, iis that as some of'the istock received at the mill is cut with. one edge bias',cin.'the ordinary handlingvof box f and 10 can readily have their barkorirr eg can be finally edge trimmed. I

ular edges trimmed down 'to' limits, depending upon the character of the said rough edge,'- and the boards thus trimmed sized to match for top,*bott0m', side or end. 7

" To providefor working" boards having one edge cutbias,-as stated, theistops 15'1 5- are adjustably mounted on the pusher bar lO ,-as shown in, Figs. 10. and 10 and are arrangednfor being adjustably set so that predetermined making box the operator by ad u'Sting the said'stops 15,1'

(see Figs. 10,10 of'the drawing) can pro.-' vide for the required feeding of the board to the desired limits, toward the cutting f disk the same as when trimming boards with relatively parallel opposite edges,- as shown on Fig. 3. i v

The'advantage in providing for trimming boards shaped on the lines indicated in Figs. 10 and 10 will be understoodwhen it is considered that in the present handling of boards of such shape, the'bias edge must be first. ripped off,'to bring such edge in parallelism with the other edge before theboard What I claim is: i

In aboard edge trimming machine, the combination with an edge. planer; of means for holding the board to be edge trimmed'at:

right anglesto the planer, the said means comprising horizontally disposed opposite rack bars, a carriage slidably mountedfon the rack 'bars, pushers mounted on the car riage that form stops for the outer edge of the board to be trimmed, the carriage including. pendent members, a shaft 'journaled at its opposite ends in the said pendent V members, and gears on the. said shaft engagingthe rack faces on thelITGSPGOtlVQ end guide bar. 1 v V V cop iesof lthis patent may be obtained for five cents each, by addressing the Commissioner of Patents,

1 5 Washington, 13.0. Y

GEORGE AivDR ws "sMrrH. L T i

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