US910050A - Shingle-band-nailing machine. - Google Patents

Description

J. E. ELWING.

SHINGLE BAND NAILING MACHINE.

APPLICATION FILED JUNE 12, 1908.

Patented Jan. 19, 1909.

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J. E. ELWING.

SHINGLE BAND NAILING MACHINE.

APPLICATION FILED JUNE 12, 1908. 910,050. Patented Jan. 19, 1909.

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J. E. ELWING. SHINGLE BAND NAILING MACHINE.

APPLICATION FILED JUNE 12, 1908.

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JOHN E. ELWING, OF SUMMIT, WASHINGTONf SHINGLE-BAND-NAILING MACHINE.

Specification of Letters Patent.

Patented Jan. 19, 190? Application filed June 12, 1908. Serial No. 438,139.

To all whom it may concern:

Be it known that I, JOHN E. ELWING, a citizen of the United States of America, residing at Summit, in the county of Chehalis and State of Washington, have invented certain new and useful Improvements in Shingle Band Nailing Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to nailing machines and especially to those for nailing a strip of iron to a strip of wood to form a shingle band such as is used in bundling shingles, and has for its object to provide a device into which the nails may be dumped and which will feed them automatically into nailing position at the proper time.

Further objects are to provide a gage by which the iron and wooden strips are placed in proper nailing positions, and to so improve the construction of such machines as to produce a machine which will be cheap to make, easy to operate and easy to keep in repair.

I attain these objects by the devices and mechanisms illustrated in the accompanying drawings, in which Figure 1 is a side elevation of my completed machine mounted and ready to use; Fig. 2 is a front elevation thereof showing it in the act of nailing; Fig. 3 is a vertical longitudinal section of the nail hopper showing the feeding mechanism and the nail conveyer leading therefrom to the nailer; Fig. 4 is a vertical transverse section on the line 4& in Fig. 3; Fig. 5 is a vertical cross section on the line 5-5 in Fig. 3; Fig. 6 is a vertical cross section of one of the nail conveyers or slides; Fig. 7 is a horizontal cross section of the nailer on the line 7-7 in Fig. 10, showing the parts in the positions which they occupy at the end of a nailing stroke, and Fig. 8 is a similar view showing the parts in the positions they occupy at the beginning of a nailing stroke; Fig. 9 is a full sized view of the shifting spring; Figs. 10 and 11 are vertical longitudlnal sections of the nailing mechanism in the beginning and ending of its nailing stroke respectively; and Figs. 12, 13 and 14 are vertical cross sectional views of the nailing mechanism showing the parts in the positions of starting the nailing stroke, just subsequent to starting the nailing stroke and finishing the nailing stroke respectively.

Similar numerals of reference refer to similar parts throughout the several views.

This invention consists of an open ended hopper into which a suitable number of nails may be placed; means in the hopper for feeding the nails forward at a uniform rate; a sliding inclined conveyer; means for agitating the conveyer; a nail valve at the end of the conveyer to admit one nail at a time to the nailing apparatus at the proper moment; a vertical sliding nail guide adapted to prevent the nail delivered thereto from falling into the position for nailing until the nail driver starts on its downward stroke,

and to guide the nail into nailing position at the proper time; and a vertical acting nail driver adapted to engage the nail in the guide and to drive it through the iron strip and into the wooden strip.

This invention also consists in providing a spillway by means of which defective nails are turned to one side and are not fed into the nailing mechanism; and in certain gages for guiding the strips to be nailed so that they will occupy their proper relative positions.

Referring now to the drawings, the nail hopper is shown in Figs. 1 to 5, and consists of a metal body having inclined sides 1 but without any front, and having its bottom 2 inclined slightly forwards. The bottom 2 is channel-shaped and holds a sliding feeder 3 formed with a number of steps or teeth t on its upper size. This feeder 8 can slide longitudinally in the channel 2 of the hopper and is actuated by means of a lever 5 pivoted to the standards at 6 and operated by means of a connecting bar 7 secured to the agitator hereinafter described, the connection between the connecting bar and the agitator being adjustable in a slot 8 so that the length of the stroke of the feeder 3 can be adjusted to suit the conditions. Above the feeder 3 and within the hopper are sup ported a number of loosely hanging bars 9 resting lightly on the steps l of the feeder.

The operation of the parts just described is: Vhen the nails are poured into the hopper and the machine is operated, the feeder 3 moves backward with the down stroke of the nailer and the nails in the hopper are pushed down one step thereon by the loosely hanging bars 9 so that on the return stroke of the nailer when the feeder travels forward the nails are carried forward in the hopper-and a few are fed over the edge of the hopper.

Immediately below the edge of the hopper, from which the nails fall, is placed the double hopper 10 of the sliding conveyer. This hopper 10 is so constructed that as many nails will fall into one side thereof as will fall into the other. As each nail falls on the inclined side 11 of this hopper 10 its head slightly retards its motion so that its point .tends .to fall into the conveyer l2 first, but in any'case the nail when it reaches the conveyer 12 is held only by its head so that .the shank of the nail han 's between the sides of the conveyer. This conveyer, as is readily seen in Fi 5, is double, so that the na ls from each side of the double hopper 10 are thereby conveyed; and since all the mechanism relative to the conveying and guiding of the nails, hereinafter described, is double, one part being on each side of the central axis of the machine, it will only be necessary to describe one each of said parts, since the other parts are the duplicates thereof. The conveyer 12 has a portion 13 of its outer side cut away from under the hopper and bent outward and a chute 1e fastened to said outer bent part 13 so that if a nail has a defective head, or has no head at all, it will fall into the conveyer directly from the hopper and through the opening thus formed in the side and out from the sides of the machine by way of the chute 14, thus ridding the machine of such imperfect nails. The conveyor is supported at its forward" and lower end from the framework of the nailing mechanism in an inclined position and rests at its upper rearward end on theagitator 15. This agitator 15 consists of a segment of a circle suitably mounted in the frame work, under the end of the hopper, and having its periphery 16 serrated and having a lever 17 secured to 1ts axis and extending to and engaging the vertical operating bar 18 of the whole machine, so that with every motion of the operating bar 18 the a itator will turn on its axis and will shake the inclined sliding conveyers 12 so that any nails hanging thereon will tend to slide downward from the hopper 10 to the nailing mechanism. The lever 17 which connects the agitator 15 to the main operating bar 18 is slotted so as not to interfere with the motion of the bar 18.

Referring now to Figs. 3 and 7 to let, as each nail arrives near the end of the sliding conveyer 12 it is intercepted by a pin 19 which passes horizontally through a hole in the sides of the conveyer 12 so that when the nail which has been immediately before it and is on the other side of the pin falls from the end of the conveyer, the pin will not allow this nail to fall at the same time. This pin 19 is secured to the nail valve and moves therewith. This nail valve consists of a plate 20 extending across the machine in front of both of the conveyers 12, and having two vertical grooves 21 therein, so positioned that when the plate 20 is at one end of its stroke the grooves 21 are out of line with the conveyors, and the pins 19 which are fastened to the plate, are withdrawn from the conveyers 12 so that the forward nail passes to the end of the conveyor 12 and rests on the plate 20 but can not move further, and so that when the plate has moved to the other end of its stroke the grooves 21 are in line with the .conveyers 12 and the end nails drop from the iconveyers '12 into the grooves 21, and at the same time th above mentioned pins 1.9 are projecting .hrough the holes in the sides of {the conveyers 12, preventing any more of the nails from falling thereinto. This plate 20 passes directly through the frameiofthe nailanechanism and is provided with a wedge-shaped projection 22 at a point near its oentenand within the frame work .of the nailing mechanism. The flat spring 23 is secured to the vertically moving nail guide hereinafter described, and is so shaped 1-S1t0 engage and move sidewise this wedge-shaped projection 22 against the action of another spring 24: which also acts on the plate 20, so that when the nailing guide is at the top :of -its stroke the plate 20 is in the position for allowing the end nail in the ,conveyers 12to drop-there from into the groove 21 therein, and :as the nail guide moves downward it moves the plate 20 sidewise through the action of'the spring 23 .on the wedge 22, iasabovedescrihed. action is accomplished by means of the spring so that if from any cause the plate should become blocked by a nail. clogged device will not break the mechanism, because the spring will give suifioiently to relieve the strain. Under each of the ends of the conveyers 12 and in line withthe grooves 21 of the plate 20 are fastened .the:.cln1tes or tubes 25 which lead the nails released by the plate 20 to the nailing mechanism.

The nailing mechanism consists of two vertically moving bodies, namely, the driver bar 18 means of a walking beam 27 or other suitable lever, and a nail guide 28 which is loose within the frame work of the nailing mechanism, but which is moved upon the driver 26, and which moves downward, when relieved of the upward pressure of the driver 26, under the actions of spring 30. This nail guide 28 is'formed substantially as isshown in Figs. 10 and 11 and has at its lower end a pair of vertical holes 13 1 into which the nails fall, and through which the plungers 31 .ofthe naildriverpa-ss; The upper part of the nail. guide 28 is (otfsetout therein, the downward stroke of the nailing 26, which is secured to thermain operating wards by means of a lug or pin 29 formed of line with the lower part, as is readily seen .130

in the drawings, and carries the above mentioned flat spring 23 by means of which the nail Valve plate 29 is operated. A pin or lug 29 is secured to the nail driver 26 and engages under the upper shoulder of the nail guide 28 so that when the driver 26 is raised to the top of its stroke it raises the nail guide 28 to the top of its stroke, but the nail guide 28 does not travel downward the full distance that the driver 29 does but simply so far that its bottom end rests on the iron strip 32 being nailed, and as this position will depend on the thickness of the wooden strip 33 and of the iron strip 32, it naturally varies somewhat. The holes 34 through which the nails pass have side entrances 35 at their upper end which connect with the nail chutes or tubes 25 after the nail guide 28 is started downward on its downward stroke, as shown in Fig. 13, but which are slightly above the nail chute or tube 25 when the nail guide 28 is at the top of its stroke, as shown in Fig. 12, thus preventing the nail, which starts to fall while the guide 28 is still rising, from falling into the nail guide, but as soon as the nail guide 28 moves downward slightly the nail falls into the side hole 35 thereof and is directed down to the strip to be nailed and is held vertically in position by means of this nail guide.

The nail driver consists of a main bar 26 having at its lower end two plungers 31 adapted to pass through the holes 3% in the nail guide 28 and to engage the heads of the nails therein. The machine is mounted on a suitable table 36, the nailing mechanism being near the front edge thereof, and the main operating rod 18 passes downward from the walking beam 27, through an opening in the table 36 and to a pedal 37, being however counterbalanced by a weight 38 adjustably secured on a lever 39 in such manner as to raise the rod 18 when the foot pressure is withdrawn from the pedal 37. On one side of the machine is placed a gage 40 adapted to receive the free end of the iron strip 32. This gage 40 is adjustably secured to the top of a bar 41 whose end acts as a gage or stop for the nailing end of the wooden strip 33. Since in practice the iron strips are cut the same length, it is evident that if the wooden strip is placed against the stop ell in nailing position, and if the iron strip is placed with its end in the gage 410, that the other end of the iron strip will lie in its proper nailing position. It is also evident that, since the exact position of the nails are known, the nails may be driven much nearer to the ends of the strips 32 and 33 thus effecting a saving in the iron used, since about one inch can be saved on each strip.

Having described my invention, what I claim is:

1. In a nailing machine, the combination of a hopper having inclined sides and open end; a reciprocating feeder in said hopper and having steps formed thereon; means for reciprocating the feeder; and loosely hanging bars engaging the feeder and adapted to prevent nails thereon from traveling back ward with the backward motion of the feeder.

2. In a nailing machine, the combination of a hopper having inclined side and open end; a reciprocating feeder in said hopper and having steps formed thereon and adapted to feed nails from the open end of the hopper; loosely hanging bars engaging the feeder and adapted to prevent nails thereon from traveling backward with the backward motion of the feeder; a double hopper under the open end of the first hopper and adapted to divide the stream of nails; two inclined conveyers adapted to receive the nails from the double hopper; an agitator adapted to shake the conveyers; means connecting the agitator to the feeder whereby the feeder is reciprocated with every movement of the agitator; and means for moving the agitator.

3. In a nailing machine, the combination of a nail tube to which nails are delivered at intervals governed by the operating mechanism; a vertically moving nail guide adapted to close the nail tube when at the upper part of its stroke, but having a hole therein communicating with the tube when below the upper part of its stroke, said hole leading to the point where the nail is to be driven; a nail driver; means for reciprocating the nail driver vertically; a plunger formed on the nail driver and adapted to enter the hole in the nail guide to drive the nail; and a lug on the nail driver and adapted to engage the nail guide to raise the guide when the driver is at the upper part of its stroke.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN E. ELWING.

WVitnesses CHARLES MGCULLEY, LEONARD MoCLEARY.

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