US1478118A - Nailing machine - Google Patents

Description

Dec. 1,8, 1923.

v lfl E. J. HENDERSON NAILING MACHINE Filed July lO, 1922 2 Sheets-Sheet 1 f WiWi/1,

Dec. 18, 1923. L4M/'8,3318

- E. J, HENDERSON NAILING MACHINE Filed July l0. 1922 2 Sheets-Sheet 2 .35 g 7 Y 1 1 o I I .f

0 Ixll ll 37- 4 j4` 'gfr'fo fZ :1: 5 3, 3 /2 4Z L- l Z 'WWA FIG.

nvewov Patented Dec. 18, 1923.

inviano srA'res PAisN EDWARD JAMES HENDERSON, OF lIIi^allv'IIL.`[ON, ONTARIO, CANADA, `.ASSIGNOR TO THE P. IB. YATES MACHINE COMPANY, LIMITED, ,OF HAMILTON, ONTARIO, CANADA.

NAILING MACHINE.

Application led July 10, 1922. Serial No. 573,822.

To at? whom may concern.' ence indicate corresponding parts in the Be itknown that l, EDWARD JAMns HEN- different views. nnnson, a subject of the King of Great Brit- 1 is the main frame of a nailing machine 55 ain, and a resident of the city of Hamilton, which has the work supporting table 2 se- 5 'in the county of lVentworth, Province of cured thereto after the usual manner as for 'flntario, Dominion of Canada, have invented instance by bolts 3. certain new and useful Improvements 'in 1l indicate nail holding chucks which are llailing` Machines, of whichthe following is rigidly supported after the usual manner 60 a specification. from the main frame 1 in brackets 5.

1o lily inventionrelates to improvements in These chucks are arranged in two sets, nailing machines with particular Vreference which sets areP disposed in spaced relation to machines for nailing boxes and the object transversely of the machine, one set being of the invention is to `improve the construcat the left and the other atthe right and all 65 tionv of such machines whereby the output chucks being at the same level.

thereof maybe increased. Nails are fed, Vafter the usual manner,

My invention consists essentially in the from a reservoir (not shown) to the chucks application to a nailing machine having through tubes 6,V but as this nail feeding nail driving means, and a work supporting mechanism forms no part of my present in- 70 table supported in spaced relation therevention it will not be described in detail.

below, of means for varying the effective 7 are nail driver rods which are associated distance between the work support and the with lthe chucks 4 inthe Well known mannail driving means automatically with the ner, used in this type of machine. operation of the nail driving means, provi- 8 (see Fig. 2) is a reciprocatory head 75 sion being made for any desired number of which is movable up and down on vertical adjusted positions andprovision also being guides formed on the main frame 1.

made for causing the various adjusted po- 9 are forwardly disposed heads rigidly sitions to occur in accordance with a previcarried by lthe head S and operatively enously arranged sequence, all as hereinafter gage they upper ends of the nail driver rods. 80 more,particularly described and illustrated The reciprocatory head S'Inay be operil in the accompanying drawings in which; ated from the main drive of the machine in Fig. 1 is a front elevation of a portion of any suitable manner such as by the crank 10 a nailing machine. showing my invention apand connecting rod 11 (see Fig. 1) but as plied thereto, the work supporting table of this follows wellknown practice in nailing 85 the machine being in section. machines and doeg not form part of my Fig, 2 is a side elevation of a portion of present inventiondetailed description is not a nailing machine showing the application thought necessary.

of my invention thereto, a portion being 12 are stepped adjusting blocks extendbroken away and taken in section on the line ing forwardly and rearwardly of the ma 90 Q, 2 of Figs. 1 and-3. chine and are slidably supported upon the Fig. 3 is a top plan view of the work supupper face of the work table'Q.

porting table. i In the form shown the blocks are pro- Fig. is a diagrammatic view showing vided with two steps A and B (see the position of a pair of adjusting blocks Fig. l). 95 and boi; supported thereby during the opl 13 are slides to which the blocks 1Q are la eration of nailing the first side on a boX. rigidly secured, said slides being freely Fig. 5 is a similar view showing the pomounted in guide slots 14 formed in the sition during the second operation, that of table 2. nailing the bottom on the box. The slides 13 extend below the under face 100 Fig. a similar View showing the poofthe table 2, and 15 are rollers mounted on sit-ion during the third operation, that of depending studs 16 which studs are secured nailing the second side on the box. to the slides 13.

1 ln Vthe drawings like characters of refer- 17 are tension coil springs secured to the inner ends of the slides 13 and to the under face of the table by a bolt 18.

These tension springs therefore tend to draw the slides 13 inwardly towards the center of the table.

2O is a shaft rotatably journalled in bearings 21 carried by the under side of the table 2 and extends transversely of the table.

22 is a. ratchet wheel having the three ratchet teeth 23 and is rigidly secured to one end of the shaft 20.

24 is a hand wheel rigidly secured to the other end of the shaft 20.

25 are cam wheels rigidly secured upon the shaft 2O and each is provided with the cam surface 26 on its outer side.

The rollers 15 are held in engagement with the cam surfaces 26 by means of the tension springs 17.

27 are rigid portions of a work gripping device and arel rigidly secured upon the main frame 1.

28 are movable portions of this work gripping device and are slidable in and out transversely of the machine.

The gripping device is normally maintained in the open position by the springs 29 which force the movable sections 28 outwardly.

30 is a shaft journalled transversely of the main frame 1 and carries the inwardly disposed cam members 31 adjacent to each end thereof, the cam surfaces of which engage rollers 32 supported in brackets 33 which brackets are connected to the movable portions 28.

34 is a bell crank lever rigidly carried by the shaft 30.

35 is a connecting rod having one end connected to the reciprocatory head 8 at 36 and the other end to one arm of the bell crank 34 at 37. y

38 is a second connecting rod having one end secured to the other arm of the bell crank at 39 and carrying at its lower end a bracket 40 which is journalled upon the shaft 20.

Within this bracket 40 is mounted a pawl 41l which engages the ratchet teeth 23.

42 is a turnbuckle within the connecting vrod 38.

43 are the end members of a wooden box. 44 are the side members and 45 is the bottom member of the box. A

46 is a band brake secured to the under side of the table 2 and operatively engages the periphery of one of the cam wheels 25..

The construction and operation of my invention is as follows;

The operation of nailing a box consists in first nailing the first side onto the end members (see Fig. 4), then the bottom member is nailed on (see Fig. 5),'and finally the second side (see Fig. 6).

In these operations it will be apparent that the height of the work varies during the different operations and since it is essential that the top of the work be supported in proper relation below thechucks 4, some means of taking care of the difference in heights must be provided and it is with a view of accomplishing -this result that I have devised my invention.

Hitherto this has been accomplished in various ways such as by providing for adjustments up and down of the work table 2 or of a supplementary table carried by the main table, but this has been cumbersome and has been accomplished manually when desired by the operator.

In the form of my invention illustrated thefirst operation in constructing a box consists in nailing on the first side (see Fig.

In this operation the adjusting blocks 12 are stationed so that the steps B are below the chucks 4, the height of the step B being. equal to the thickness of one of the side pieces 44.

y The end pieces 43 are slipped into the open grips 27 and 28 and rest upon the steps B. The side 44is then placed above the ends in position under the chucks 4 and the nail driving mechanism is operated in the usual Imanner by releasing a trip (not shown) which causes the reciprocatory head 8 to descend thus operating the nail driver rods 7 vafter the usual manner.

The next operation consists in nailing on the bottom 45 and since the height of the box in this case is less than the width it is necessary to compensate for this difference, and in nailing the bottom vthe adjusting blocks 12 move inwardly so that the steps A are under the chucks and support the ends 43 (see Fig. 5).

This inward movement of the blocks 12 is accomplished as follows.

During the previous descent of the reciprocatory head 8 in nailing the first side 44, as above. described, through the medium of the connecting rod 35, bell crank 34 and connecting rod 38 the pawl 41 was moved anti-clockwise (see Fig. 2) and slipped freely around the ratchet wheel 22 to grip the next tooth 23 thereon.

During the following ascent of the head 8 the pawl 41 rotated the ratchet wheel 22 and with it the shaft 2O through 120 degrees and thus the cam wheels 25 were rotated through `one-thirdl of a revolution. This brought the lowest portion D of the cam surfaces 26 in contact with the rollers 15 so that the blocks 12 were drawn inwardly to their full extent by the springs 17.

The bottom 45 is now nailed similarly to the side44 above described and during this reciprocation of the head 8 the ratchet. wheel 22 is again. rotated through 120 degrees with a consequent rotation of the cam wheels 25 through a second third ota revolution, bringingthe high points E ot the foam surfaces 26 into engagement with the rollers 15 so that the slides 13 and with them the blocks 12 are moved outwardly to their 'full extentand the blocks 12 are removed entirelyy from under the chuclrs ,4.

"servesI to prevent the cams from over rotation during the operation of the machine;

It will be noted from yan examination of Figs. 4L, 5 `and 6 that the height ofthe bottom ot the chucks A@above the table 2, (indicatedby the letter C inFigs. 4, 5 and 6) i'svconstant and it is' essential'that. in the v diiierent nailing loperations, if the height of the work is less than this distance C, a Ytiiler of the proper height must be placed beneath the work so that the height of the work plusthe height of the filler is equal to the height (l.

rlhis is accomplishedin my invention automatically with the operation of the inalchine andA when once' set the operator has simply to go through the operations of inserting the material without paying vany heed whatever to this adjustment for height.

4it will be vapparent that the stepped adjusting blocks Bi are moved in and out automatically with the operation of the nail driving mechanism and that by the ratchet device and the cam wheels 25, the movement 'ot these blocks is such that the various steps may be brought into operative position under the chucks e, in accordance with any prearranged sequence. j

During each descent ot the` reoiprocatory head 8 and the consequent operation of the nail driving mechanism the inwardly directedv cam members 31 force the movable grip members 28 inwardly so that thework is rmly gripped during the `nail driving operation. i j

rlfhis gripping arrangement is also operated automatically with the operation of the nailing mechanism.

Various modiiications may be made in my Y invention without departing from the spirit ot the invention or the scope of the claims `and therefore the exact forms shown are to be taken as illustrative lonly, and not in a limiting sense.

For instance whileI have described a specific embodiment of my invention with reference to a case in which only three dif- 'bloclr are positioned ferent heights are used it is obvious that it may equally well be applied to cases where any number or" adjustments are necessary, it being` only necessary that the number ot teeth on the ratchet 22 correspond to the number olf adjustments desired and that the cam surfaces 2G be properly constructed.

Also the brake e6 may not be mounted to engage one of the cam wheels but might engage a separate brake drum carried by the shaft 20.

lVhat claim as my invention is: 1. In a nailing machine the combination with nail driving means and a work supporting 'table situated in spaced relation therebelow, ot a stepped block slidably carried on the upper 'tace or the work supporting table, said block constituting' a work support below the nail driving means, and means for moving the stepped block upon the table whereby any of the various steps thereof may be stationed below the nail driving means.

2. In a nailing machine the combination with nail driving means and a work supporting table situated in spaced relation therebelow, ot a stepped block slidably carried on the upper tace of thc work supporting table, said block constituting a work support below the nail driving means, means operatively connecting the nail driving means with the stepped block whereby the latter is automatically moved upon the table by the `'l`ormer and the various steps ot' the below the nail driving means in accordance with a definite prearranged sequence.

3. ln a nailing machine the combination with nail driving means and a work supporting table situated in spaced relation therebelow, of a stepped block slidably car-- ried on the upper face of the work supporting table, said block constituting a work support below the nail driving means, spring means :forcing the block in one direction, a cam associated with the block tor moving it inthe reverse. direction against the action of the aforesaid spring, and means operatively connecting the nail driving means and cam whereby the latter is automatically rotated from the former and the various steps ot the block are positioned successively below the nail driving` means.

l. En a nailing` machine the combination with naii drivingmeans and a work supporting table situated in spaced relation the-i'ebeloiv, of a stepped block slidably carried on the upper tace ot the work support ing table. said block constituting a work support below the nail driving means, spring means 'forcing the block transversely or" the table in one direction, a shaft rotatably supported from the under side ot the table and extending transversely thereof, a ratchet Wheel'at the outer end of said against the action of vthe aforesaid spring.

. the

, 5. In a nailing machine the combination with the main frame of the machine, nail holding 'chuck rigidly carried thereby, a work supporting table supported by the main frame in spaced relation below the chucks, nail driving` means associated with chucks and a reciprocating head mounted upon vertical guides on the main frame and operatively engaging the nail driving means, of a stepped' block slidably supported upon the upper face of' the table, and means operatively connecting the stepped block with the reciprocatory head, whereby the block is moved,transversely upon the table automatically with the reciprocation of the head and `whereby successive reciprocations of the head position the various steps of the block successively. below the chucks in accordance with a prea-rranged sequence.

6. In a nailing machine the combination with the main frame of the machine, nail holding chucks rigidly carried thereby, a work supporting table supported by the main frame in spaced relation below the chucks, nail driving means associated with the chucks and a reciprocatory head mounted upon vertical guideson the main frame and operatively engaging the nail driving means, of a stepped block freely supported upon the upper face of the table, a slide mounted in a transverse guide slot in the table, said block secured to said slide, a roller carried by the under face ofthe slide, a shaft rotatably carried at the under side of the tableand extending transversely thereof, a cam rigidly carried by said shaft and engaging the aforesaid roller, a ratchet wheel rigidly carried by the outer end Vof the shaft, a bell crank lever pivotally mounted upon the main frame, a connecting rod connecting one arm of the bell crank to the reoiprocatory head, a second connecting` rod having one end connected to the other arm ot' the bell crank and carrying a pawl at its other end, said pawl operatively engaging the aforesaid ratchet wheel, said cam adapted to more the slide and stepped block in one direction transversely of the table, and

spring` means resisting;- such movement.

7. ln a nailing machine the combination with the main frame of the machiner1 a plurality of sets of nail holding chucks, rigidly supported by the main frame, the sets spaced transversely of the machine, a work supporting table rigidly carried by the main frame. in spaced relation below the chucks, nail driving means associated with the chucks,

and a reciprocatory head mounted upon vertical guides on the main frame and operatively engaging the nail driving means, of a pluralityof-stepped blocks slidably supported upon the` upper face ofk the, table, each block constituting a work support below one set ofchucks, and means for moving the blocks transversely upon the table wherev by the kvariouspsteps thereof may bepositioned below the sets of chucks.

8. In a nailingmachinethecombination with the main frame of the machine, a plurality of sets of nail holding chucks, rigylow oney of chucks, and means for'simultaneously moving` `the. blocks transversely upon the table whereby corresponding steps thereof may be positioned below the various sets of chucks.

9. In a nailing machine the combination with the main frame o-f the machine, a plurality of setsof nail'holding chucks, rigidly supported by the main frame,vthe sets spacedy transversely of the machine` a work supporting table rigidly carried by the main Vtraine in 'spaced relation belowl the chucks, nail driving means `associated withv the chucks, and a reciprocatory head mounted upon vertical guides on the main frame and operatively engaging the nail driving means, of aI plurality ofl stepped blocks slidably supported upon the upper` face of the table, each block constitut-inga work support below one set of chucks, means'for simultaneously moving the blocks transversely upon the table whereby corresponding steps thereof may be positioned below the various sets yof chucksand means'operatively connecting said block moving means with the reciprocatory head whereby the latter is actuated by the former. y i

l0. In a nailing machine the combination with the main frame of the machine, two sets of nail holding chucks rigidly supported by lthe main frame, the sets spaced transversely of the machine, a. work supporting table rigidly carrieclby the main frame in spaced relation below the chucks, nail driving means associated withthe chucks, and a reciprocatory head mounted upon Vertical guides on the main frame and operatively engaging `the nail drivingmeans, of two stepped blocks slidably supported 'upon the upper face of the table, each block constitut-ing a work support below one set of lidly supported by the main frame, the sets i chucks, a slide secured to the under face of each bloc-k, said slides freely mounted in aligned transverse slots in the table, a roller carried by the under face of each slide, a shaft rotatably supported at the under face of the table and extending transversely thereof, a pair of outwardly disposed cam wheels rigidly carried by the Shafts, spring means forcing the slides inwardly and maintaining the aforesaid rollers in engagement with the cam surfaces of the cam wheels, and means operatively connecting the transverse shaft and the reciprocatory head whereby the latter is rotated by the reciprocation of the former.

- versely of the machine, a worlr supporting table rigidly carried by the main frame in spaced relation below the chucks, nail driving means associated with the chucks, and a reciprocatory head mounted upon vertical guides in the main fra-me and operatively engaging the nail driving means, of two stepped blocks slidably supported upon the upper face of the table, each block constituting a work support below one set of chucks, a slide secured to the under face of each block, said slides freely mounted in aligned transverse slots in the table, a roller carried bythe under face of each slide, a shaft rotatably supported at the under face of the table and extending transversely thereof, a pair of outwardly disposed cam wheels rigidly carried by the shafts, springmeans forcing the slides inwardly and maintaining the aforesaid rollers in engagement with the cam surfaces of the cam wheels, a ratchet wheel rigidly carried by one end of the transverse shaft, a bell crank lever pivotally mounted upon the main frame, a connecting rod connecting one arm of the bell `crank to the reciprocatory head, and a second connecting rod having one end connected to the other arm of the bell crank, said second connecting rod carrying a. pawl at its other end, said pawl operatively engaging the aforesaid ratchet wheel.

EDWARD JAMES HENDERSON. Witnesses:

JOHN G. HAYWARD, NORIEEN Comas.

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