US2997714A

US2997714A - Staying machine

Info

Publication number: US2997714A
Application number: US849313A
Authority: US
Inventors: George B Speidel
Original assignee: METAL EDGE IND
Current assignee: SUARM Inc A CORP OF PA; METAL EDGE IND
Priority date: 1959-10-28
Filing date: 1959-10-28
Publication date: 1961-08-29
Anticipated expiration: 1978-08-29

Description

Aug. 29, 1961 G. B. sPElDEL 2,997,714

STAYING MACHINE ATTORNEYS Allg 29, 1961 6.5. sPElDEl. 2,997,714

s'rAYING MACHINE Filed Oct. 28, 1959 7 Sheets-Sheet 2 GEORGE B, SPE|DEL BY FI G 2' A-MMLiHMQL-l? ATTORNEYS Aug. 29, 1961 G. a. sPElnEL 2,997,714

STAYING MACHINE Filed Oct. 28, 1959 '7 Sheets-Sheet 3 FIG. 5.

INVENToR. GEORGE B. SPEIDEL ATTORNEYS Aug 29, 1951 G. B. sPl-:lDEL 2,997,714

STAYING MACHINE FIG. 4.

INVENToR, GEORGE B* SPEIDEL BY Mfsmauduwm ATTORNEYS Aug 29, 1961 G. B. sPElDEL 2,997,714

STAYING MACHINE:

Filed 0Wl 28. 1959 7 Sheets-Sheet 5 Fl G. 7.

INVENToR. GEORGE B. SPEIDEL A118" 29, 1961 y G. B. sPElDEL 2,997,714

STAYING MACHINE Filed Oct. 28, 1959 7 Sheets-Sheet 6 FIG. IO.

INVENToR. GEORGE B. SPEI DEL Y ATTORNEYS Aug. 29, 1961 G. a. SPEIDEL STAYING MACHINE:

7 Sheets-Sheet 7 Filed Oct. 28, 1959 JNVENToR. GEORGE B. SPEIDEL -ua}-\`tl-.+

ATTORNEYS nited States This invention relates generally to box staying machines and particularly to improvements in such machines .adapted for the application of metal stay strips to box corners.

Machines of the type referred to here are disclosed, for example, in United States Patents Nos. 2,480,888; 2,009,421; 1,346,573; 1,192,201; and 793,549.

Machines of the type contemplated comprise a die and anvil for the application of a stay strip to a box corner in combination with means for automatically feeding a length of stay strip to the die in each operation of the die and in which the length of stay strip is cut off and fastened to a box corner laid on the anvil.

A principal object of the present invention is to provide such a machine with improved means for actuating the die, and for actuating the stay feeding mechanism. in predetermined timed relation.

Another object of the present invention is to provide such a machine with ldie operating and stay feeding means both actuated through the medium of one and the same crank pin element.

Still another object of the present invention is to provide such a machine with improved means for guarding against injury to the operators ngers.

An important object of the present invention is to provide such guarding or safety means which is extremely sensitive, responding immediately to an obstruction interposed between the die and the work.

Another important object of the present invention is to provide such guarding or safety means in the form of an articulated light weight assembly of members free of slide connections so that friction is maintained at a minimum.

Still another important object of the present invention is to provide such guarding or safety means in the form of an articulated assembly of members biased downwardly solely by the weight of its membe-rs.

Other objects of the present invention will become apparent when the following description is read in conjunction with the accompanying drawings in which:

FIGURE 1 is a vertical section looking from the front toward the rear of a box staying machine constructed in ,accordance with the invention;

FIGURE 2 is a vertical section looking from the right toward the left side of the machine;

FIGURE 3 is an enlarged section on line 3 3 of FIGURE l showing the condition of the machine at the beginning of a cycle;

FIGURE 4 is similar to FIGURE 3, but shows the normal condition of the machine at about the one-quarter point in the cycle;

FIGURE 5 is a fragmentary portion of FIGURE 3, parts being broken away and shown in section for clarity;

FIGURE 6 is a horizontal section on line 6 6 of FIGURE 5', parts being brokenV away for the sake of clarity;

FIGURE 7 is a view looking as indicated by line 7-7 of FIGURE 5;

FIGURE 8 is a section on line 8-8 of FIGURE 5;

FIGURE 9 is a view looking as indicated by line 9-9 of FIGURE 6;

FIGURE 10 is an enlarged plan view as indicated by line 10-10 of FIGURE 3; and

ice

FIGURE 11 is an enlarged section on line 11-11`-of FIGURE 3.

A staying machine in accordance with the present invention comprises a pedestal in the form of a number of structural members welded together to form a rigid framework. The pedestal is provided with four legs 12 mounting a top plate 14, a pair of braces in the form of plates i6 disposed respectively on opposite sides of the pedestal, a brace plate 18 between the two rear legs and a brace plate 20 between the two fore legs.

The pedestal mounts the head of the machine, which comprises a head frame including an upright plate 26 on the left-hand side of the pedestal and an upright plate 28 in the center of the pedestal, each of these plates being seated upon the pedestal and secured thereto by means of studs 30 projected upwardly through the top plate 14. Interposed between the

plates

26 and 28 is a spacer member 32 which is generally U-shaped in transverse section, and coacting with the member 32 for securing the

plates

26 and 28 together are a set of three tie bolts 34. Carried by the plate 28 is a bracket 36 secured in position by studs 38, and carried by the bracket 36 is a plate 40 secured in position by studs 42 and thereby disposed on the right-hand side of the pedestal.

Just above the plate 14 is a pivot pin 46 having opposite end portions journaled respectively in the

plates

26 and 28. Fitted over the pin 46 is an eccentric bushing 48 disposed between the

plates

26 and 28 and xed to the pin 46 by a pair of pins 50. Turnably fitted over the bushing 48 is the hub 52 of an anvil member and extending forwardly from the hub 52 is a tapered anvil nose 54 suitably grooved for receiving an anvil tip 56 secured to the nose by studs 58. Extending rearwardly from the hub 52 is a tapered anvil tail 60 terminating in a crosspiece 62 fitted between the

plates

26 and 28. Underlying the crosspiece 62 is an anchor 64 having opposite end portions thereof extending respectively into recesses 66 formed respectively in the

plates

26 and 28. Projected through the anchor 64 and the crosspiece 62 is a -bolt 68. Secured to the top plate 14 are a pair of nuts 70, and threaded through the nuts 70 is a bolt 72 which carries a nut 74 and a washer 76. The latter serves as a seat for a compression spring 78 wrapped around the bolt 72 and biasing the tail 60 upwardly. Threaded upon the opposite end portions of the shaft 46 respectively are a pair of nuts 80, and the terminal portion of the shaft 46, on the left-hand side of the machine, is fitted with a handle 82 terminating in an indicator 84 which coacts with a scale 86 mounted on the plate 26. Normally, the nut next to the handle is drawn tight so that the shaft 46 cannot be moved about its axis. However, when it is desired to raise or lower the anvil tip 56 the nut 80 next to the handle S2 may be loosened, the handle manipulated so as to position the shaft 42 and the eccentric bushing 48 mounted thereon in a position which affords the desired elevation of the anvil tip 56. Then the nut 80 may be retightened to relock the anvil member in adjustedposition.

At the rear of the machine yare a pair of coaxially aligned pins 90 respectively journaled in the

plates

26 and 28. Secured respectively to these pins are the furcations 92 of a bifurcated rear end portion Lof a beam 94. The fore end portion of this beam is bifurcated and the forcations, designated 96, carry a crosspiece 98. The undersurface of the fore end portion of the beam 94 is grooved, as -at 100, for receiving the dovetail 102 of a die member 104 adjustably xed .in position by means not shown. The undersurface of die member 104 is provided with an invented V-shaped groove 106.

The rear end portion of the die member 104 is slidably fitted with a cutter slide 108 which is retained by a springpressed cover plate 110 and which is yieldably biased downwardly by spring means not Shown. Pivoted to the cutter slide 108, as at 114, is the fore end portion of a throat 116. The rear end portion f the throat 116 is siidably seated upon a pin 118 mounted upon an extension 120 at the tail end of the beam 94. Mounted upon the throat 116 is a stationary pawl carrier 122 which carries a pawl 124, and a movable pawl carrier 126 which mounts a rear pawl 12S. The beam 94 carries, at 129, an anchorage for a pair of tension springs 131 having their other end portions anchored, as at 133, to a bar 135 carried by the

plates

26 and 28.

Mounted upon the plate 18, at the foot of the pedestal, is an electric motor 132 provided with a pulley 134. Trained around the pulley 134 is a belt 136 which is also trained `around a pulley 138 mounted upon a shaft 140. The opposite end portions of the shaft 140 are journaled respectively in bearings 142. The shaft 140 also mounts a double-grooved pulley 144 about which are trained a pair of belts 146 which extend through an opening, designated 148, in top plate 14, and which are also trained about a double-grooved ywheel 150. The flywheel is mounted for rotation upon a shaft 152, the opposite end portions of which are journaled respectively in a bearing portion 154 formed on the spacer member 32 and in the plate 40. Overhanging the bearing 154 is a terminal portion of the shaft 152 which has aflixed thereto a crank wheel 155 which carries a crank pin 157.

The shaft 152 mounts a single revolution clutch 158 disposed between the flywheel 150 and the plate 40. The plate 40 carries a pintle 160 over which there is fitted the hub 162 of `a clutch member having a pawl 164 and a pair of arms 166. Secured to one of the arms 166, as at 168, is a tension spring 170 which has its other end portion anchored to the plate 40, as at 172. Pivotally Y secured to the other arm 166, 'as at 175, is a link 176 having its lower end pivotally secured, as at 178, to a treadle 180. The treadle is pivoted, as at 182, to a bracket 184 mounted upon the plate 20.

Connected to the crank pin 157 is one end portion of a link 188. The opposite end portion of this link is connected by a pin 190 between the furcations 192 of a bifurcated end portion of a link 194, which link is mounted to turn freely upon a shaft 196 having its opposite end portions 'carried respectively by the

plates

26 and 28. Also mounted upon the shaft 196 isa U-shaped link 198, the branches thereof, designated 199, being disposed respectively upon opposite sides of the link 194. The closed end of the link 198, designated 202, is disposed forwardly of the shaft 196. Carried by the open end of the link 198 is a pin 204, and disposed between the branches of the link 198 is the upper end portion of la link 206 having its lower end portion secured to a pin 208 connected to the beam 94.

The furcations 192 of the link 194 are extended for carrying a pin 210 which mounts la latch 212 terminating in a portion 214 hooked under the closed end portion 202 of the link 198. The latch 212 has anchored thereto, as at 216, one end portion of a tension spring 218 having its opposite end portion anchored, as at 220', to the link 194. The closed end portion 202 of the link 198 mounts a spacer element in the form of a bolt 224 disposed in underlying abutting relation to the link 194. The latch 212 carries -a roller 226 which is adapted to engage the cam surface 228 of Ia fan-shaped plate 230 mounted for turning upon the shaft 196 and disposed between the link 194 and one of the branches 199 of the link 198. The plate 230 is extended rearwardly, as at 232, and carried by the link 198 is a spacer element in the form of a bolt 234 disposed in underlying abutting relation to the plate extension 232. The plate 230 is also extended, as at 236, for mounting a roller 238.

Also connected to the crank pin 157 is one end portion of a link 242 having its opposite Vend portion connected by means of a pin 244 to the arm 246 of a bell crank mounted upon a shaft 248, the opposite end portions 0f 4 the shaft being carried respectively by the

plates

26 and 28. The other Earm of the bell crank, designated 250, is connected by a pin 252 to the closed end portion of a U-shaped link 254. The open end portion of the link 254 is connected, as at 256, to the movable pawl carrier 126.

At the rear of the machine, near the pins 90, is a shaft 258 having its opposite end portions carried respectively by the

plates

26 and 28 and carrying the rear end portion of a safety beam member 257 including two laterally spaced opposite side arms 260. At the rear end of the member are a crosspiece 262 and bosses 264, through which bosses the shaft 258 extends. Intermediate the ends of the member is a crosspiece 268. Each arm 260 is provided with a longitudinally extending upright area 270 and a longitudinally extending area 272 extending inwardly and downwardly from the portion 270 at a right angle to the underlying sloping side of the anvil member. The fore end portion of the member 257 is secured, as at 274, to a link 276 of inverted U-shape, which link is pivoted, as at 278, to the open end of a U-shaped link 280. The closed end of the link 280 is mounted upon a shaft 282 having its opposite end portions carried respectively by the

plates

26 and 28. Depending from the closed end portion of the link 276 is a spacer element in the form of a bolt 284, the -lower terminal portion of which rests upon a crosspiece 98 of the beam 94. One of the branches of the link 280 is provided with a cam surface 286 which is adapted for engagement with the roller 238.

The electric motor 132 is suitably connected with a source of electric power by means including a manually operable electric switch (not shown). When the switch is closed, the motor 132 turns the motor pulley 134, which, through the bel-t 136, turns the pulley 138, shaft and the pulley 144. The latter pulley, through the belts 146, turns the flywheel about the shaft 152, which is releasably secured against rotation by reason of clutch pawl 164 engaging a clutch detent 288.

In order to apply a corner stay (in the form of a perforated metal strip) to a box, two adjacent side panels of the box blank are turned up at right angles to the bottom panel of the box. The meeting end portions of the side panels are laid respectively over the opposite side surfaces of the anvil, and the bottom panel is pushed up against the fore end of the anvil tip 56. With the work thus positioned, the operator depresses the treadle 180, thereby pulling the link 176 downwardly and swinging the pawl 164 outwardly from under the detent 288 against the influence of the spring 170, whereupon the shaft 152 is released for rotation. When the treadle is released, the pawl 164 and the treadle 180 are returned to their initial positions by the spring 170. If the treadle 180 is released immediately, the shaft 152 makes one complete revolution Iand the machine passes through one complete cycle. If the treadle 180 is not released immediately, the shaft 152 makes a plural number of complete revolutions and the machine passes through a corresponding number of complete cycles. The number of revolutions and cycles depends, of course, upon how long the treadle is held down by the operator.

Referring particularly to FIGURE 3, the crank wheel 15,5 turns clockwise, and, considering what happens during the rst half or the working portion of the cycle, the crank pin 157 draws the link 188 rearwardly, whereupon the link 194 swings clockwise about the shaft 196. Simultaneously, the latch l212 swings the vlink 198 clockwise about the shaft 196, and the link 198 forces the link 206 downwardly, whereupon the beam 94 swings counterclockwise about the axis of the pins 90 against the influence of the springs 131. Thus the die member 104 is lowered to the work, the groove 106 formed in the bottom of the die member 104 registering with the underlying work arranged over the anvil tip 56.

When the beam 94 swings downwardly, the throat 116,

supported at its fore end upon the .cutter .slide .108 and slidably seated at .its `rear end ,on the.pin i118swings downwardly t too.

The crank pin 157 also actuatesthe link .242, which first swings the bell crank arms .246 .and ,25.0 .clockwise and then counterclockwise abouttheshaft 24S, in consequence of which first the link `254 swings counterclockwise about the pin 256 and thepawlcarriage .126..moves forwardly, and then the link 254 swings clockwiseand the vpawl carriage 126y moves rearwardly.

During the second half or.nonsworking portion of the cycle, the operation .of the several parts is ,reversed so that at the endof the cycle the machine is restored Vtoits initial condition. It should be noted that during the initial and iinal portions of a cycle, the pawl carriage 126 advances, while during the intermediate portion of the cycle the pawl carriage 126 retracts.

A long strip of the metal edging -with which the corner of the box is to be .stayed is threadedthrough the throat 116, under the pawls 128 and V124, through -a Vsuitable feed opening (not shown) formed in the cutterslide 108 and into the groove 106 lfo-rmed in theundersurface of the die member104. When the `beam 94 swings downwardly, the die member `104 andthe cutter slide 10.8 swing downwardly too. The 'cutter slide 108 is iirstto engage the anvil tip 56. Thus descent of the cutter slide 108 terminates prior to descent of the member 4104. As the member 104 continues to descend, it closes the feed opening. Simultaneously, a Suitable lengthoffthe metal edging is cut off, suitably shaped and applied to the corner of the box. It should be notedthat the feed opening is open when the cutter slide 108 is not engaged with the anvil tip 56.

The pawl 128 engages in the perforations of the metal edging. When the pawl 128 advances,\the metal. edging is advanced. When the pawl 128 gretracts, itsimply ratches freely over the metal edging. The lost motion necessary for proper feeding is obtained by the useofA a strip 290, which is adapted for holding the pawl 128 free of the metal edging during the portion of a cycle when the pawl 128 is advancing and no feeding is desired. The pawl 124 is a holding pawl.

It should be noted that the beam `94 and rear pawl 128 are operated in predetermined timed relation respectively through the medium of two separate trains of articulated linkage, with both trains actuated by one and the same crank pin 157. In addition, the arrangement is such that the pawl 128 cannot feed the metal edging toward the cutter slide 108 except during `the portion of the cycle when the feed opening in the cutter slide 108 is open.

The safety beam 257 and the link 280 tend to swing counterclockwise respectively about the pins 90y and the shaft 282, being biased solely by their own weight and that of the link 276. 'Ihe bolt 284 rests upon the crosspiece 98 to prevent such swinging movement, but when the beam 94 swings downwardly, normally the articul-ated assembly including the safety beam 257 and

links

276 and 280 follow, and the roller 238 swings clear of the cam surface 286. In the event that the operator does not remove his lingers from between the die member 104 and the underlying work in good time, the safety beam 257 engages the lingers before the die member 104 can do so, in consequence of which the assembly including the safety beam 257 and

links

276 and 280 is prevented from following the beam 94, and the link 280 is disposed so that the roller 238 cannot swing clear of the cam surface 286. Thus relative movement between the fan plate 230 and the link 194 occurs during the working portion of the cycle, the fan plate 230 being held in such a position that the roller 226 rides over the cam surface 228, forcing the latch 212 to swing clockwise about t-he pivot 210 against the influence of spring 218. When latch 212 releases' link 198, the transmission of working power to the beam 94 is effectively interrupted, and the die member 104 cannot bear upon the operators fingers. At

6 most, only Athe weight of the assembly including .the safety beam 257 and the

links

276 and 280 `(preferably made of light weight metals,.such as aluminum) is brought to bear upon the operators fingers.

It should be noted that .the connection of the safety beam 257 with the

plates

26 and 28, the connection of the link 280With the

plates

26 and 28 and the connections of the link 276 respectively with the safety beam 257 and the link 280 are all effected by pivots, in consequence of whichfriction is maintained at a/minimum and the sensitivity of the safety mechanism at a maximum.

It will be understood, of course, that the apparatus hereinabove described and shown in the accompanying drawings is susceptible of various changes and modifications which may be made from time to time without any departure from the general principles or real spirit of the invention. Accordingly, it is intended to claim the present invention broadly, aswell as specically, as in dicated in the appended claims.

What is claimed is:

l. In a machine for applying metal strip, an anvil, a die, means for closing said diewith said anvil including a revolvable member, a pin carried by-said member and spaced radially outwardly from the central axis thereof, a train of articulated links operatively interposed between said die and pin, means detachably latching a pair of said links together for movement thereof as 'a unit and for transmission of working force from said pin and through said train of links to said die, and means responsive to an obstruction interposed between said anvil and die for unlatching said pair' of links thereby to interrupt transmission of working force to said die .including a member arranged for movement with said pair of links and latch as a unit,.coacting cam means respectively on said member and latch, and means arranged for movement with said die and .adaptedfor engaging said obstruction `and for being displaced thereby lrelative to said die for engaging with and shifting said member relative .to said pair of links .and latch therebyto actuate said cam means and open said latch.

2. In a machine for applying metal strip, an anvil, a die, means for closing said die with said anvil including a revolvable member, a pin carried by said member and spaced radially outwardly from the central axis thereof, a train of articulated links operatively interposed between said die and pin, means detachably latching a pair of said links together for movement thereof as a unit and for transmission of working force from said pin and through said train of links to said die, and means responsive to an obstruction interposed between said anvil and die for unlatching said pair of links thereby to interrupt transmission of working force to said die including a first member arranged for movement with said pair of links and latch as -a unit, an element mounted upon said member for movement in a fixed path, and articulated means including a second member extending across said fixed path, said articulated means being arranged for movement with said die for withdrawing said second member from said fixed path, and being adapted for engaging said obstruction and for being displaced thereby relative to said die for shifting said second member to a position crossing said fixed path for engagement thereof with said element thereby to shift said first member relative to said pair of links and latch for opening the latter.

3. In a machine for applying metal strip, an anvil, a die, means for closing said die with said anvil including a revolvable member, a pin carried by said member and spaced radially outwardly from the central axis thereof, a train of articulated links operatively interposed between said die and pin, means detachably latching a pair of said links together for movement thereof as a unit and for transmission of working force from said pin and through said train of links to said die, and means responsive to an obstruction interposed between said anvil and die for unlatching said pair of links thereby to interrupt transmission of Working force to said die including a first member arranged for movement with said pair of links and latch as a unit, one element mounted upon said member for movement in an arcuate path, and articulated means including a second member mounted for pivotal movement about -a first fixed axis and extending across said arcuate path, a beam member mounted for pivotal movement about a second fixed axis, a link connecting the free ends of said second and beam members, said articulated means being arranged for movement with said die for withdrawing said second member from said arcuate path, said beam member being adapted for engaging said obstruction and for being displaced thereby relative to said die for shifting said second member to a position crossing said arcuate path for engagement thereof until said element thereby to shift said first member relative to said pair of links and latch for opening the latter.

4. In a machine for applying metal strip, an anvil, a iirst beam extending over said anvil and swingable about a fixed axis, a die carried by said beam, means for actuating said beam thereby to close said die with said anvil including crank means mounting a crank pin, a train of articulated links interposed between said beam and crank pin, means detachably latching a pair of said links together for movement thereof as a unit about a second iixed axis and for transmission of working `force from said crank pin and through said train of links and said beam to said die, and means responsive to an obstruction interposed `between said anvil and die for unlatching said pair of links thereby to interrupt transmission of working force to said die including a first member arranged for movement with said pair of links yand latch as a unit, an element mounted upon said member for movement in an arcuate path, and articulated means including a second member mounted for pivotal movement about a third xed axis and extending across said arcuate path, a second beam extending over said anvil and swingable about a fourth xed axis proximate said first fixed axis, a link carried by said first beam and connecting together and supporting the free ends of said second beam and member, said articulated means being adapted for movement with said rst beam for withdrawing said second member from said arcuate path, said second beam being adapted for engaging said obstruction and for being displaced thereby relative to said first beam for shifting said second member to a position crossing said arcuate path for engagement thereof with said element thereby to shift said first member relative to said pair of links and latch for opening the latter.

5. In a machine lfor applying metal strip, an anvil, a die, means for closing said die with said anvil including a crank, a train of articulated links operatively interposed between said die and crank, means detachably latching a pair of said links together for movement thereof as a unit and for transmission of working force from said crank and through said train of links to said die, and means responsive to an obstruction interposed between said anvil and die for unlatching said pair of links thereby to interrupt transmission of working force to said die including a member `arranged for movement with said pair of links and latch as a unit, coacting cam means respectively on said member and latch, and means arranged for movement with said die and adapted for engaging said obstruction and for being displaced thereby relative to said die for engaging with and shifting said member relative to said pair of links and latch thereby to actuate said cam means and open said latch.

References Cited in the le of this patent UNITED STATES PATENTS 527,574 Wood Oct. 16, 1894 576,863 Leliler Feb. 9, 1897 1,192,201 Jackson July 25, 1916 1,305,343 Smith June 3, 1919 1,346,573 Walz July 13, 1920 2,332,644 Junkin Oct. 26, 1943 2,838,757 Holtkamp a June 17, 1958