US1858706A - Box machine - Google Patents

Description

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WITNESS! Patented May 17, 1932 PATENT OFFICE I JULIAN A. GILES, OF DERBY, CONNECTICUT BOX MACHINE Application filed November 2, 1928. Serial No. 316,683.

This invention relates to a new and imroved box machine of the type wherein Boxes are automatically produced from a roll or web of paper or card-board.

It is the object of this invention, among other things, to provide a machine of this character that is adapted by adjustment of its parts to produce boxes of various sizes, that will occup the minimum floor space and sufficiently light to permit its installation without special foundations, etc., composed of parts that are accessible and will enable all operations to be readily observed, 'to design and arrange the parts so that the same maybe quickly changed for another size box, to provide dies and punches that are adapted for various size boxes, to provide a gluing mechanism that may be moved into or out of position as may be necessary and that will apply glue in the proper place for any combination of box sizes within the range the machine, to provide means for pinching all boxes after the glued portions of the blank are in contact with each other, to provide an improved detachable printing mechanism, and in these and other ways, as will more fully appear, to produce a box machine that will perform the maximum number of required operations with mechanism that is simple in construction, readily assembled and produced at the minimum cost.

In the drawings accompanying and forming part of this specification, wherein like numerals of reference indicate like parts in i the several figures;

Figure 1 is a fragmentary plan view of my improved machine;

Figure 2 is a front view of a portionthereof;

Figure 3 is a View ofthe left side of the machine; a

Figure 4 is a vi w of the gluing mechanism and adjacent parts;

Figure 5 is a detail side view of the gluing mechanism and adjacent parts; i

Figure Bis a view of a blank from which 'a box is formed;

Figure 7 is a similar view for the box cover;

Figures 8, 9 and 10 are views of the printing mechanism and adjacent parts;

Figure 11 is a fragmentary sectional view of some of the parts shown in Figure 9, those in section being taken generally upon line 55 1111 of Figure 10;

Figure 12 is an enlarged transverse sectional view of the feed mechanism, punch and (lie mechanism, and box forming mechanism, the parts in section being taken generally upon line 1212 of Figure 1;

Figure 13 is a sectional view of the parts, taken upon line 13-13 of Figure 1;

Figure 14 is a plan view of the rear half of the die and box forming mechanism; t

Figure 15 is an end view of a portion of the die looking toward the right of Figure 14 with the rear half of the punch associated therewith;

Figure 16 is a transverse sectional view of a portion of the die formingmechanismflaken upon line 16--16 of Figure 14;

Figure 17 is a fragmentary sectional view of the upper plunger;

Figure 18 is another sectional view thereof,

the parts in section being taken generally upon line 18--18 of Figure 17 Figure 19 is a side elevation of the upper plunger;

Figure 20 is a transverse sectional view of the upper plunger, taken upon line 2020 of Figure 17 Figure 21 is a fragmentary sectional view of another form of upper plunger;

Figure 22 is an end elevation of the punch;

Figure 23 is a view of the underside thereof showing the arran ement of the cutting and scoring knives to orm a box;

Figure 24 is a similar. view illustrating the position of the scoring and cutting knives to form a cover;

Figure 25 is'an enlarged view of the sc0ring knives and associated parts;

Figure 26 is an enlarged sectional view of the standard and some adjacent parts;

Figure 27 is a detail end view of a portion of'the sizing block mechanism and adjacent parts;-

Figure 28 is another view of lustrated in Figure 27 the parts ill shown in Figure 31;

5 associated therewith;

Figure 32 is a sectional view thereof, the parts in section being taken generallyon line 3232 of Figure 31;

Figure 33 is an end view of the parts Figures 34, 35 and 36 are views of the feed rolls and aform of rotary scoring device;

Figures 37, 38, 39 and 40 are views of various forms of scoring rolls; and

Figure 41 is a detail view of the mechanism for lifting one of the feedrolls.

Referring to the drawings, designates the bed plate supported by legs 11 and 12, between which are the frames 13 and '14, in the latter of which is journaled one end of the feed lever shaft 15. Fixed on the bed plate is a standard 16, upon which the slide 17 is reciprocated through the link 18 on the shaft 19 and connected'with the rock lever 20 on the shaft 21. A ball joint connection 23, the shank 24 of which projects into the rock lever 20, and held in its adjusted positions by the screw 25, unites the rock lever 20 with the rod 22. This rod is also connected with the ball bearing pin 26, fixed in the gear 27 on the shaft 28. The teeth of this gear mesh into those of a pinion 29 fixed on the shaft 30 having a hand wheel 31 thereon for convenience in manual operation of the machine for purpose of adjustment, testing work, etc. On the end of the shaft opposite to the hand wheel is a friction clutch pulley 32 by means of which the machine is belt driven.

The paper 39 (Figure 8) for making boxes is taken from a roll or web of paper mounted on a floor stand (not shown), as is. usual,

the anged collars 33 thereon. The flattened ends-35 of this shaft project into slots in fixed parts and hold the shaft from turning but permit a limited movement up and down.

The collars 33 are adjustably fixed on the shaft 34 and the flanges thereon project into the grooves 36 of the rolls 37 rotatable on the shaft 38. These collars and rolls form a guide for the paper and can readily'be adjusted for different widths of paper and may also serve as a drag to keep the paper taut.

The strip of paper 39 then passes partly around the roll 40 mounted upon shaft 41, just touching the shaft 42, on which is adjustably mounted the flanged collars 43-43 that function ,as guides. The paper then passes partly around the lower feed roll 44 and under the upper feed roll 45, respectively mounted upon the shafts 46 and 47.

I find it convenient to have the lower feed roll 44 of substantially the same width as the maximum width of the paper strip within and fpasses under stationary shaft 34 between the capacity of the machine, and the upper feed roll the width of the inside of the smallest box.

The roll 40 is driven from the pinion 48 on the shaft 42 through a gear 49 rotatably mounted on a stud 50 in frame 14 which drives the pinion 51 on shaft 41. The feed rolls 44 and 45 are positively driven b the gears 52 and 53 mounted upon the sha ts 46 and 47, respectively, from a ratchet wheel 66. From these feed rolls the pa r strip 39 travels horizontally to the punc ing and scoring dies, cutting off knife and forming die. The feed mechanism is operated in timed relation with associated mechanism from an eccentric 54 mounted on the shaft 28, around which is an eccentric strap 55, which is connected with the feed lever 56 journaled upon the shaft 15.

Within the slot in the feed lever 56 is a block 57 that is moved by a screw 58 threaded therethrough. Pivotally connected with the block 57 is a chain 59 which is fastened at its opposite end to a drum 60 which revolves upon the shaft 46, being operated for a feed movement of the paper strip 39 by the chain and returned to its original position by a coil spring 61.

One end of the spring is connected with a pin 62 in the drum 60 and the other end is eld stationary in a notch 63 in the bed plate 10. Projecting radially from the drum60 is an arm 64 having an opening 65 in the outer end thereof.

Secured on the shaft 46 is the ratchet wheel 66 and journaled therein is the pawl carrier 67, in which is journaled the shaft 68 having a head 69 thereon which projects into the opening 65 of the arm 64. On the shaft 68 is a pawl 70. The opening 65 is enlarged at the point where it passes over the head 69 of the shaft 68, so that there is a slight lost motion therein which is suflicient to throw the pawl into and out of mesh with the ratchet wheel 66 when the drum 60 is operated. This construction does not allow the pawl to drag over the teeth of the ratchet when moved backwardly thereover and will positively insure engagement of the pawl with the teeth of the ratchet wheel when moved forwardly. When the drum 60 is about to move and impart a forward feed movement to the strip of paper 39, the pawl 70 engages the ratchet and the feed rolls 44 and 45 rotate a suflicient distance to advance the strip the desired distance. The extent of this movement is regulated by the position of the block 57 within the feedlever 56.

On the bed plate 10 is a stop block 71 which is held in any of its adjusted positions by means of the screw 72. This stop block 71 is so adjusted that the pawl shaft 68 in its extreme forward position will be engaged thereby and prevent the pawl jumping out of the ratchet and allow the feed to jump ahead and operate at fast speeds A piece of leather, hard rubber or the like, 73, may be imbedded in the face of the stop block 71, if desired, to minimize any noise that might arise from the engagement of the shaft therewith.

The pawl carrier 67 oscillates slightly on the shaft 46 and is provided with a counterbalance weight 74 to facilitate ease in operation. w

The head 69 of the shaft 68 is smaller in diameter than the opening in the arm '64, therefore, it has limited relative movement therein. The outer end, however, of the head 69 (Figure 12), while rounded on its sides, is the same width as the radial slot in the arm 64, that extends from said enlarged opening but fitted so as to rock therein. As the arm 64 is actuated by the chain 59, through the drum 60, moving to the left as shown in Figure 12, the nose of the pawl 70 is thrown into engagement with the teeth in the ratchet wheel 66. During the reverse movement there is a slight travel of the arm 64 before the head 69 engages one wall'of the enlarged opening therein, during which time the outer end of the head 69 moves with the arm. This rocks the head 69 with the pawl 70 thereon and lifts the outer end thereof out of the teeth of the ratchet wheel 66. Thereafter, the pawl moves as a unit with the arm 64 during the completion of the travel of the arm 64 in this direction; Reverse actions take place at the reverse movement of the arm 64. that is, when the arm starts its travel toward the left, as in Figure 12. the arm 64 advances slightly until the wall of the enlarged opening engages the head 69, at which time the pawl 70 is actuated and the nose thereof thrown into engagement with the teeth of the ratchet wheel as before.

By this construction and operation a positive feed even at fast speeds is assured, there being a constant pressure upon the pawl. to project and maintain it in contact with the teeth in the ratchet wheel 66.

The stop block 71 is adjusted after the length of the feed hasbeen determined, and at the extreme limit thereof the shaft 68 contacts therewith and brings the feed to a full stop. This prevents the pawl from jumping out at the end of the stroke and also a possible overfeed by reason of the momentum of the parts. The stop block 71 is especially advantageouswhere the machine is operating at high speeds but is not so essential where the speed is slow, because the momentum is much reduced in the latter speed over and above the former.

In the hub of the pawl carrier 67 is a spline 75, within which is a pressure plate 7 6, a spring 77, and a leather friction block 78. The spring 77 is of such strength as to apply suflicient pressure on the shaft 46 through the block 78 to hold the pawl carrier against independent relative movement.

- Fixed on the bed plate 10 are two housings 79, in which are movably mounted the journal boxes 80 for-the shaft 47. A confeed movement when the lever has relieved,

the tension of the cam 84 thereagainst.

In each housing 79 is a pin 86, upon the inner end of which is journaled the cam 84 and upon the outer end is a link 87. The opposite ends of these links are joined by a shaft 88, upon which is fixed the frames 89 and 90. Each of the links 87 has astud 91 cam 84 which bears against that projects through a radial slot 92 in the housings 79 and through the nuts 93 thereon holds the links in any adjusted position. s The lower ends of the frames 89 and are connected with a shaft 95 in arms 96 which are keyed to a shaft 97 journaled in the legs 11 and 12 and the brackets 109 fixed to said 1e s. Upon the shaft is a counterweight 98 w ich is a complete balance for the gluing mechanism. The gluing pan 99 is preferably made with a double bottom, between the walls of which steam is admitted to provide hot glue if desired, although in practice glue on1 dmachines of this type is generally used co I The gluing pan 99 is supported upon each side by the ribs 100 which ro ect into grooves upon the inside faces of the frames 89 and 90 and held therein by the screws 101. WVhen these screws are positioned so that the fiat sides of the collar 102 are adjacent to the side walls of the gluing pan the latter may be withdrawn.

The gluing roll shaft 103 is journaled in boxes 104, which are locked against acci-' dental disengagement from the frame by the pin 105. The gluing rolls 106 on shaft 103 pass through the liquid glue within the pan 99 and pick up glue which is deposited upon the transfer rolls 107 mounted on the idler shaft 108.

On the shaft 110 journaled in the pan 99 is a scraper 111 for each of the gluing rolls 106 and held in contact therewith under the required tension by screws 112.

Journaled in a bracket 113 on the frame 89 is a shaft 114 having projecting therefrom two drive pins 115, which contact with a pin 116 that projects from the shaft 103.

J ournaled in the bed plate 10 is the shaft 117, upon the opposite ends of which are fixed the sprocket wheel 118 and 119, the former being connected by the chain 121 with asprocket wheel 120 on the hub of pulley 32, and the sprocket wheel 119 being connected with the sprocket wheel 122 "on the shaft 114 by the chain 123, so that a positive rota movement is imparted to the gluing roll shaft 103 from the drive shaft 30.

The distance between the centers of the sprockets 118 and 122 is the same as the distance between the centers of the shaft 88 and pin 86. Therefore, the gluing mechanism as it is raised or lowered moves on an are around the circumference of the lower feed roll 44, thus allowing the strip 39 to be glued in different positions, which is necessary on account of the blanks being of varying widths for different size boxes, it being prerequisite that the gluing should be done while the strip is moving.

In the frames 89 and 90 is a shaft 124, having a lever 125 thereon, to one end of which is bolted the squared center portion of the shaft 108 by means of the bolt 127 and spring washer 126.

The transfer rolls 107 are moved toward and away from the feed roll 44 in timed relation with the feed of the strip 39 through a rock lever 128-on the shaft 124 and connection rod 129 between the rock lever 128 and rock lever 130 having a stud 132 thereon.

The rock lever is actuated by the cams 133 and 134, which may be adjusted relatively to each other to acquire the'proper length of glue contact of the transfer rolls 107 on the strip 39 by the bolts 135 which pass through the slots136in the cams and threaded into the cam 260. These cams are so shaped and timed that they hold the transfer rolls 107 against the gluing rolls 106 when there is no feed of the strip 39.

The spring .137 'on the bolt 138 which contacts with the lever 128 holds the transfer rolls 107 against the paper strip 39 until the cams 133 and 134 return them to the gluing rolls 1061 I v The rod 129 has a universal jointco'nnection with the lever 128 through the stud 148 and is adjusted relatively thereto by the nuts 149. I i

Slidable in the brackets 139 on the bed. plate 10 is' the shipper rod 140 which is con-' nected' through the member 143' with the clutch lever 141, by means of which the clutch 142 andpulley 32 are moved into and out of engagement with each other. This, clutch mechanism and the means for oper-' ating the same constitute no part of my present invention and are not therefore shown herein more in detail.

Slidably mounted on the bed plate 10 is a stop bar 144, the inner end 146 of which engages a part 147 on the rock lever 130 when in the position shown in Figure 2 and holds the roll 131 out of contact with the cams 133 and 134, hence'there is no movement of the transfer rolls 107 toward the feed roll 44and no glue is transferred to the strip 39. v p

An ofi'set portion of the shipper rod 140 near the front of the machine projects into a notch 145 when in the position shown in Figure 2. \Vhen the handle on the shipper rod 140 is turned "about 90 it carries the bar 144 to the left, as shown in Figure 2, and in the inner end 146 thereof out of contact with the rock lever 130, which is then subject again to the action of the cams 133 and 134.

In operation, the strip 39, after passing the feed rolls 44 and 45, is fed between the guides 150 that are secured to support bars 316, then between the punching and scoring dies, which brings itto the cutting knife 151 on the knife head 152, which is rotatable on the centering pins 153 in the standard 16. This knife head is positioned by a spring bolt 154, movableiin a lug 155 on the standard 16, the spring 156 associated therewith being of sufiicienttension to return the knife 151 to its up position, as shown in Figures 3 and 26. The knife is operated for its cutting stroke by the plunger bar 157 that is movable within the lugs 158 on the slide 17 and having an adjusting nut 160*and a lock nut 161 thereon. During the down stroke of the slide 17 the lower end of the plunger bar 157 engages the surface 162 of the knife head 152 and moves the same upon its pivot mounting across the knife 175 fixed to the forming die side plate 312, at which time a portion of the blank is cut off. The block 320forms a guide for the knife and prevents the same from springing away from the knife 175. T hespring 164 surrounding the plunger bar 157 is of'sufficient strength to overcome the tension of spring 156 and apply suflicient power to the knife to cut the paper strip.

The knife is returned to its up position by the spring 156. In its down position the knife 151 is prevented from moving away from the knife 175 by the guide block 320.

The down position of the cutting knife 151 is determined by'the engagement of the washer 324 with the'washe'r 325, the position of the former being variable on the spring bolt 154. The washer 325 is of soft material to minimize the noise caused by the contact of the washer 324 therewith; but is not essential to the operation of the machine, as wash-" er 324 can contact with the top of the lug 155. A'similar' washer 326 is located under the lug 155 to perform a'siniilar function at the completion of the up stroke of the spring bolt154. j

' In the die 165, secured to the bed plate 10, are two pins 166 which pass through openings in the punch 167 and surrounded by springs 168 which normally hold the die 165 and

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