US2279638A - Automatic nailing machine - Google Patents

Description

April e. c. PAXTON ET AL 2,279,638

AUTOMATIC NAILING MACHINE Filed Nov. 15, 1939 17 Sheets-Sheet l April 1942- G. c. PAXTON ET AL 38 AUTOMATIC NA ILING MACHINE Filed Nov. 13, 1939 17 Sheets-Sheet 2 FIG. 2 4w April 14, 1942. e. c. PAXTON ET AL 2,279,633 Y AUTOMATIC NAILING MACHINE Filed Nov. 13, 1959 17 Sheets-Sheet 3 fire: 3

J06 J06 START STOP REVERSE FOPNAPD April 1 ,19 2- 6. Q-PAXTON ET. AL 19,638

- AUTOMATIC NAILING MACHINE Filed Nov. 13, 1959 17 Sheets-Sheet 4 April 14, 1942.

AUTOMATIC NAILING MACHINE Filed Nov. 15, 1959 17 Sheets-Sheet-S a. PAXTON ET AL 2, 7 38 April 14, 1942. G. c. PAXTQN m 6 8 AUTOMATIC NAILING MACHINE Filed Nov. 13, 1939 17 SheetS-SheetB wmvmes: l rm. 24x70, dasd. a e/140w: P070 and h I 722 I23 25 Y L /5 Awe/w April 14, 1942- G. c. PAXTON ET AL 2,279,538

AUTOMATIC NAILING MACHINE Filed Nov. 13, 1939 17 Sheets-Sheet 7 a 6 w w w M w W m \m W5? r w w fa mmmmm 6 m wnmw 4v A ril 14, 1942. G. c. PAXTQN Em 2,2 9,638

' AUTOMATIC NAILiNG MACHINE I Fi led Nov. 13. 1959 17 Sheets-Sheet 9" April 4, 1942.

G. c. PAXTON ET AL AUTOMATIC NAILING MACHINE Filed Nov 15,

17 sh(-zet ll 322 Illll v lllllllllllllllllIlllillllfllim April 14, 1942, G. c. PAXTON ET AL 2,279,633

AUTOMATIC NAILING MACHINE Filed Nov. 15, 1939 17 Shets-Sheet 1s April 14, 1942. G. cz. PAXTON ETAL AUTOMATIC NAILING MACHINE 'Filed Nov. 15, 1959 17 Sheets-Sheet 14 A3 224? wmmm w 7 x6 mmmw c ww m N J mmm w 4 W MM g April 14, 1942. a. c. PAXTON ET AL AUTOMATIC MAILING MACHINE 'Filed Nov. 13, 1939 1'7 Sheets-Sheet 1G i 1942- G. c. PAXTON ET AL 3 5 AUTOMATIC NAILING MACHINE Filed Nov. 15, 195 17 Sheets-Sheet 17 406 I as? 15 M. a a 4 9420 3/6 ass 2/ I5 242 [I w M. WW 4, m l v w Z 9 29a K a; A5 v 5/ a;

.I53 /50 I6 28 a5 Patented Apr. 14,1942

azvacss AUTOMATIC NAILING MACHINE Gerald G. Paxton and Glenn M. Criger, Riverside, Calif., and Walter Hale Paxton, deceased, late of Riverside, Calif., by Geraldine Paxton and H. S. Nicks, executors, Riverside, Calif., assignors to Food Machinery Corporation, San Jose, Calif., a corporation of Delaware Application November 13, 1939, Serial No. 304,162

59 olaims ol. 1-14) This invention relates to box nailing machines and is particularly useful inmaking small boxes at a high rate of production.

Extremely large quantities of small wooden boxes are used annually in the marketing of i cigars, cheese and other products. A single firm in the United States, for example, uses 72,000,000 small boxes annually. Heretofore, these boxes have been made on hand fed or semi-automatic machines and large numbers of such machines and operators have been required to produce these boxes. r

An object of the present invention is to provide a machine for making small boxes at a j high rate of production while requiring the-services of a minimum number of operators.

The shook used in the manufacture of small boxes is so thin that it often warps, thus making it difiicult to handle and nail. Previous attempts to provide full automatic machines for assembling and nailing such shookhav'e failed to solve the problem of handling warped shook automatically without jamming the machine or producing imperfect boxes.

A further object of this invention is the provision of such a machine having means for preventing interference with the operation. thereof by warped shook. i

As the above mentioned boxes are made in many difierent sizes and proportions, it is highly desirable that such a machine be readily adjustable to handle dilferent sized shook and produce boxes of various sizes.

Accordingly, a still further object of our invention is to provide a box making machine which is readily adjustable to make boxes of a wide range of sizes.

Other objects and advantages will become apparent in the following description. taken in connection with the accompanying drawings; in which:

Fig. 1 is a front elevational view of a preferred embodiment of the box making machine of our invention.

Fig. 1A is a perspective View of a box of the general type and proportion for which the machine shown in Fig. 1 is adjusted to make.

Fig. 2 is a vertical sectional view of the machine taken on the line 2-2'of Fig. 1.

Fig. 2A is a fragmentary perspective view of a portion of the frame of the machine of our invention, showing a gib on which one of the, nailing heads is guided.

Fig. 3 is a horizontal sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 is an electrical wiring diagram shows ing the manner in which the electrical elements of the machine are wired.

Fig. 5 is a vertical sectional View taken on the 7 line 55 of Fig. 2 and showing the lower portion of the machine.

Fig. 6 is a fragmentary vertical sectional view taken on the line 0-6 of Fig. 5. V

Fig. '7 is a horizontal sectional view taken on the line 1-7 of Fig. 1. H Fig. 7A is a detail perspective view of one of a pair of adjustable frame members includedin the machine of our invention.

Fig. 8 is an enlarged, fragmentary plan view of the central-portion of the machine as seen in Fig. 7, Fig-8 showing end and side shookin the magazines provided therefor with the innermost pieces of this shook disposed against the shook assembling form thereby.

Fig. 8A is a fragmentary View of one corner of the box form shown in Fig. 8, showing the relationship of. the side shook. to a piece of end shook of less than average length. j

Fig. 8B is a view similar to Fig. 8A but showing how the side shook flexes into contact with. a short piece,of end shook when engaged by anail chuck. 7

Fig. 9 is a fragmentary view similar in part to Fig. 8 and showing the manner in which the side and end shook is'retained in the magazines by the shock assembling'form after completion. of a box and prior to the next successive shook picking operation.

Fig. 10 is a fragmentary elevational view look ing in the direction of the arrow"! 0 of Fig. 8 and shows the manner in which one of the vertically.

adjustable corner plates of the side and end shook magazines is mounted.

Fig. 11 iS an enlarged per p t of the f reciprocating shook assembling form included in the machine of our invention.

Fig. 12 is a fra mentary, vertical sectional view taken on the line l2-l2 of Fig. 11.

Figs. 13 to 16 inclusive are fragmentary sec-,

tional views taken on the line Iii-l3 of Fig. 11

and showing the manner in which the shook assembling form is supplied with shook, the w I. successive positions shown in these figures being as follows:

Fig. 13 shows the shook assembling form descending after a box making operation.

Fig. 14 shows the shock with an adjacent piece of side shook tilting into position against the form.

in position to be elevated form still descending I J shook and lugs engaging the lower edge thereof.

Fig. 17 is an enlarged, fragmentary sectional 'view taken on the line il-l1 of Fig. 1 and show- 1 ing the shook magazines empty.

' Fig. 17A is an enlarged, fragmentary -view showing means for adjusting the length of certain rods of the machine shown in Fig. 1'7.

Fig. 18 is a fragmentary view similar to Fig.

1'7 but taken at a higher levelon the machine as indicated by the line l8l8 of Fig. 1.

Fig. 19 is an enlarged, vertical sectional view taken on the line l9-l9 of Fig. 2 showing end shook in the magazines provided therefor and showing the shook assembling form in its lowermost position. i

Fig. 19A is a perspective view of one of a pair of horizontal frame members of the machine on which the pieces of bottom shook slide while being fed from the magazine into position over the shook assembling form, these frame members also servingto carry finished boxes as the latter are being discharged from the machine.

Fig. 20 is an enlarged perspective view of one of the horizontal chuck carriers included in the nailing mechanism of the machine.

Fig. 2 1 is a perspective view of the nail chuck shown in 'Fig. 20 illustrating the manner in which the chuck is taken apart.

Fig. 22 is an enlarged, horizontal sectional view taken on the line 22-42 of Fig. 20. p

Fig. 23 is a vertical sectional view taken on the line 23-23 of Fig.- 22 showing the internal construction of the nail chuck disclosed in Figs.

20, 21 and 22.

I Fig. 23A is a perspective view of one of a pair of vertically reciprocal heads on which the nail chucks of the machine are mounted, most of the parts beingremoved from the head to more clearly show the formation of the latter.

1 Fig. 24 is an enlarged, fragmentary, vertical sectional view taken on the line 24-24 of Fig. '7 showing the mechanism for operating a switch to stop the machine when the shock magazine thereabove is almost empty.

Fig. 25 is an enlarged, fragmentary, perspective view looking in the direction of the arrow 25 of Fig/28 showing the switches for stopping the machinein the event of failure of the bottom shook feeding mechanism or box ejecting mechanism.

Fig. 26 is an enlarged, fragmentary, Vertical sectional view taken on the line 2626 of Fig.

1'7 showing one of the box strippers for removing finished boxes from the shook assembling form. a

. Fig. 27 is a 'fragmentary, vertical sectional view taken on the line 21-21 of Fig. 26 and shows one of the feed dogs for feeding pieces of bottom shook into position 'over the shock as,

sembling form of the machine. I Figs. 28, 29, 30 and 31 are enlarged. fragmentary, vertical sectional views taken on the same plane as Fig. 2, these views illustrating successive stages in the operation of the machine during fabrication of a box.

' Fig. 28 shows the shook assembling form during, its upward movement at the moment of stripping pieces of side and end shook from the magazines, this view also showing the ejection of previously made boxes and the feeding of a piece of bottom shook into the path of the rising shook assembling form.

Fig. 28A is a fragmentary operation view of certain portions of the machine shown in Fig. 2, the scale of Fig. 28A being the same as that of Fig. 2 and half that of Fig. 28. The positions of the elements shown'in Fig. 28A correspond with the positions in Fig. 28 of the shook assembling form and bottom shook feeding and box ejecting dogs.

Fig. 283 is a fragmentary, vertical sectional view in reduced scale showing the manner in which the side and end shook magazines of the machine are supplied with shook without stopping or otherwise interrupting operation of the machine. I

Fig. 29 shows the shook assembling form with a set of shock assembled thereon just as the shook on the rising form contacts the vertically reciprocal nailing head. This View also shows the shook feeding and box ejecting do'gs being moved rightward in preparation for the next shook feeding and box ejecting operation.

Fig. 29A is a view similar to Fig. 28A but showing a successive position of the elements which .cause the shock assembling form and; shook feeding and box ejecting dogs to be positioned as shown in Fig. 29.

Fig. 30 shows the shook assembling form elevated to its uppermost position after it has lifted the nailing heads .causing the latter to drive nails in each end of the sides and bottom of a box to complete the formation of the latter.

Fig. 30A is a view similar to Figs. 28A and 29A and shows the elements thereof in corresponding positions relative to the positions of the form and dogs as shown in Fig. 30.

Fig. 31 shows the shock assembling form hearing its lowermost position just after the stripping of a finished box therefrom, this view also showing the shook feeding and box ejecting dogs disposed in rightwardmost position with the ejector dog in position to remove the said finished box leftward out of the path of the vertically reciprocating form.

Fig. 31A shows the positions of the power transmitting elements which cause the form and dogs to be positioned as shown in Fig. 31.

Fig. 32 is a fragmentary vertical sectional view taken on the line 32-32 of Fig. 31 and showing a finished box resting on the strippers just after being stripped from the shook assembly form.

Fig. 33' is an enlarged, fragmentary vertical sectional view taken on the line 33-33 of Fig. 31 but showing the finished box still on the form at the moment of engagement of the box by the strippers.

Fig. 34 is a perspective view of one side of the upper portion of the machine looking in the direction of the arrow 34 of Fig. 7.

Referring specifically to the drawings, a box making machine l0, comprising a preferred em- 9, 10), bottom shook feeding and box ejecting mechanism I! (see Figs. 2, 17, 19, 19A, 28, 29, 30, .31 and 34), and nailing mechanism It (see Figs. 1, 2, 18, 19 and 28).

Before continuing with the specific description of the structure of our invention, we will point out its general mode of operation. The shook assembling form I is reciprocated vertically over a given operating path, each cycle of operation beginning with this form in its lowermost position. As it starts to rise, this form picks up two pieces of end shock and twopieces of side shook to form the ends and sides of a box. Continuing upward, this form receives a piece of bottom shook disposed horizontally and,

The base 11 The base II as shown in Figs. 1, 2, 3, 5, 6 and '1,

includes a base plate 28, upon which a housing 2| is mounted, the latter including side walls 22 as shown in Figs. 3 and 5, and front and rear walls 23 and 24 respectively, as shown in Figs. 2, 3 and 7. Bolted to the rear wall 24 and the base plate 28 as seen in Figs. 2 and 3 is a motor housing 25. As shown in Figs. 2 and '1, the upper edges of the front and rear walls 23 and 24 are formed to provide T slots 28. Mounted in a socket plate 38 provided on the base plate 28 is a pair of vertical tubes 3| as shown in Figs. 2 and 8, these tubes being joined at the upper extremities thereof by a cross bar 32 (see Figs. 2 and 19). Extending from the bar 32 to the front wall 23 of the housing 2| is a V brace 33 as shown in Figs. 2, 11 and 18.

The frame structures 12 and 13 The frame structures I2 and I3 include a pair of cast cross members 84 adjustably mounted on top of the housing 2! as shown in Figs. 7, 7A, 17, 18 and 19. Each of the cross members-84 (see Figs. '1 and 7A), includesbosses 35 having set front and rear walls 23 and 24 of the housing 2| by bolts 48 extending into the aforementioned T slots 28, the bolts 48 having nuts 48A thereon. Adjustable vertically in the bosses 85'of the cross members 34 are four posts 4|, the latter being secured vertically by the set screws 36. Mounted on the posts 4| of each of the frame structures I 2 and I3 as seen in Figs. 1, 2A, 19 and 34, is a cross bar 42 bored at its ends to receive the posts 4| and having set screws 43 for locking the cross bar 42 on the posts 4|. Fixed on top of the bar 42 are rubber bumpers 44 for a purpose described hereinafter. Mounted centrally on each of the cross bars 42 as seen in Figs. 2A and, 19 is a vertical column 45 shaped in cross section as seen in Fig. 18. Formed centrally through the column 45 is an opening 46 referred to hereinafter. As seen in Figs. 1, 2 and 19, the upper end of each of the columns 45 is secured to a head casting 41 mounted on the upper ends of the posts 4! of The power mechanism 14 The power mechanism I4, shown in Figs. 2, 3, 5 and 6, includes a crank shaft 48, rotatably supported on the base plate 28 by a casting 49 formed to provide bearings 58 and 5|. Fixed on the shaft 48 as seen in Fig. 5 is a crank 52 having a crank pin 53 and mounted on the shaft 48 between the bearings 58 and 5| is a fly wheel 54, and a small sprocket 55. On the end of the shaft 48 adjacent the bearing 5| is a large double sprocket 56 and a cam 51. As shown in Fig. 6, the cam 51 i formed to provide a lobe 58, an arcuate depression 59, and curved portions 68 and 8|. As shown in Figs. 5 and 6, a lever 64 is pivotally mounted in a clevis 65 provided on the base plate 28, the lever 64 having three pins 66, 61 and 68 extending transversely therethrough and a finger 69 at the free end thereof, a set screw 18 being threadedly mounted in the finger 69. Mounted on the base 28 below the finger 69 of the lever 64 is a switch 12, the purpose of which will be described hereinafter. Mounted on the pin 61 of the lever 64 is a roller 14 and a connecting rod 15. As shown in Figs. 3 and 6,

the roller 14 is positioned for engagement with the periphery of the cam 51'.

J ournalled in bearings 18 and'19 formed on the back wall 24 of the housing 2| as seen in'Figs. 5 and 6 is a horizontal oscillating shaft 88 having an arm 8| fixed on one end thereof, the latter being joined to the upper extremity of the connecting rod 15 extending from the lever 84. Fixed on the shaft 88 between the bearings 18 and 19, as shown in Figs. 5, 6 and 19, is a pair of bifurcated arms 82 having idle sprockets 83 mounted in the ends thereof.

Mounted on the base plate 28 within the housing 25 as shown in Figs. 2, 3, 5 and 6, is amotor M, the latter being of conventional design and including a built-in speed reducing unit 86 and an electrically operated brake mechanism 81, the

latter being adjustable by means of a lever 88 as shown in Figs. 2 ,and 3.

Extending from the speed reducing unit 86 of the motor M is a drive shaft 89 having a cone 98 keyed thereon as shown in Fig. 3. Frictionally mounted on the cone 98 is a small double sprocket 9| retained in frictional engagement with the cone 98 by a cap screw 92 and washer 83. Trained about the double sprockets 9| and 56 is a chain 94 for transmitting rotation of the motor M to the crank shaft 48.,

Mounted on the base plate 28, as shown in Figs.

2 and 3, is a pair of bearings 96 in which a shaft 81 is rotatably mounted, the latter having cranks 98 fixed on opposite ends thereof, the purpose of the latter being described hereinafter in relation to the nailing mechanism I5. Fixed on the shaft 91 is a sprocket 99, the latter being driven from the crank shaft 48 by a chain I88 trained about the sprocket 55.

Mounted on the rear wall 24 of the housing 2| as seen in Figs. 2, 5 and 6, is a bracket I having a pin I86 on which a lever I81 is pivoted. The lever I81 is bifurcated at its extremity as shown in Fig. 5 and has a pin 88 extending therethrough on which a link I 88 is pivoted. Extend ing transversely through the bifurcated end of the lever I81 are three holes MB, III and H2 in which a pin I I3 may be selectively mounted. Extending from the pin II3 to the crank pin 53 of the crank 52 is a connecting rod I I4 adjustable each of the frame structures I2 and iii, the cast,-

Images