US3693878A

US3693878A - Swinging cement applying mechanism

Info

Publication number: US3693878A
Application number: US124891A
Authority: US
Inventors: Karl F Vornberger
Original assignee: Individual
Current assignee: Individual
Priority date: 1971-03-16
Filing date: 1971-03-16
Publication date: 1972-09-26
Anticipated expiration: 1989-09-26

Abstract

A cement spraying nozzle that is swingable through a prescribed arc and is effective to spray cement while swinging through an adjustable angle after it has begun to swing and before it terminates its swinging.

Description

United States Patent Vornberger 145] Sept. 26, 1972 SWINGING CEMENT APPLYING [56] References Cited MECHANISM N UN D ES TE T [72} Inventor: Karl F. Vornberger, Tewksbury, [TE STAT PA S Mass. 2,857,201 10/1958 Palmer ..239/587 x 1,687,178 10/1928 Peterson ..239/225 X 1731 Asslgnw Jmb Kamborian, West Newton. 2,039,769 5/1936 Bird ..239/97 Mass 2,728,639 12/1955 Ransburg ..239/97 X 22 i March 1 1971 2,964,246 12/1960 Alholm et a1. ..239/97 X 2,979,271 4/1961 Boyden ..239/DIG. 1 1211 Appl. No.: 124,891

FOREIGN PATENTS OR APPLICATIONS Appumm" Dam 959,817 4/1950 France ..1 18/300 Division of Ser. No. 41,500, May 28, 1970, Pat. Nov 3,609,785.

U.S. CI. ..239/97, 239/236,, 239/242 Int. Cl. ..B05b 3/00 Field 01' Search.....239/D1G. l, 97, 99, 225, 537,

Primary Examiner-M. Henson Wood, Jr. Assistant Examiner-Edwin D. Grant Attorney-Albert Gordon [57] ABSTRACT A cement spraying nozzle that is swingable through a prescribed arc and is effective to spray cement while swinging through an adjustable angle after it has begun to swing and before it terminates its swinging.

3 Claims, 12 Drawing Figures PATENTEDSEPZS r972 SHEU UlUF 10 PAIENTEUSEP26 1912 3.693. 878

sum 02 HF 10 PATENTEDSEPZS Ian SHEET OBDF 1O PATENTEU 3,693,878

SHEET sum 10 PATENTED SEPZS m2 SHEET CESBF 10 vnwa 5 2.25 1 4 LbFfiE lE PAIENTEB SEPZB um SHEET U7BF 1O PATENTEU E I 7 3.693.878

sum 09 0F 10 FIG-ll PATENTEDssrzs m2 3 693.878

sum IOGF 10 SWINGING CEMENT APPLYING MECHANISM This is a division of application Ser. No. 4l ,500 filed May 28, 1970, now US. Pat. No. 3,609,785.

in a shoe lasting operation, when causing wiping means to wipe the heel portion of an upper margin against an insole and bond the wiped upper margin to the insole by cement, it is conventional to apply cement into the angle formed between the upper margin and the periphery of the insole prior to the heel wiping operation. The length of the upper margin that is to be bonded to the insole by the wiping means, and therefore the length of the upper margin and/or insole periphery to be applied with cement, is proportional to the length of the shoe assembly. This invention relates to a cement applying mechanism thatcan apply an adjustable length of cement to the upper margin and/or insole periphery. This mechanism comprises a nozzle that is swingable through a prescribed arc and an arrangement for not spraying cement from the nozzle at the beginning and at the end of the swinging movement of the nozzle and for spraying cement from the nozzle while the nozzle is swinging through an adjustable angle after it has begun to swing and before it terminates its swinging.

in the drawings:

FIG. 1 is a side elevation of a heel lasting machine that incorporates the cement applying mechanism;

FIG. 2 is a front elevation of the machine taken on the line 22 of FIG. 1;

FIG. 3 is a side elevation of an applicator-hold-down unit in the machine;

FIG. 4 is a plan view taken on the line 4-4 of FIG. 3',

FIG. 5 is an elevation of the cement applying mechanism;

H0. 6 is a view taken on the line 6-6 of FIG. 5;

FIG. 7 is a view taken on the line 7-7 of FIG. 5',

FIG. 8 is a view taken on the line 8--8 of FIG. 6;

PK]. 9 is a section of a motor for swinging the nozzle taken on the line 9-9 of FIG. 3',

FIG. 10 is a section of a cement melting and pumping mechanism;

FIG. 11 is a representation of a shoe assembly as it appears in the machine during the cement spraying operation, and

HO. HA is a view taken on the line llA-llA of FIG. 1 1.

Referring to H08. 1 and 2, the machine includes a shoe assembly supporting mount 10 and heel wipers 12. The machine is inclined so that the plane in which the wipers lie is inclined from the horizontal and the longitudinal axis of the mount i0 is inclined from the vertical to facilitate accessibility of the machine to the operator. For ease of explanation, the plane in which the wipers l2 lie will be considered to be horizontal and the longitudinal axis of the mount 10 will be considered to be vertical. in operating the machine, the operator stands to the left of the machine as seen in FIG. 1, and directions that extend toward the operator will be described as forward while directions that extend away from the operator will be described as rearward A column 46, located forwardly of the mount it), has a toe rest 110 mounted to its top. A last support plate 148 (FIG. 11) is mounted to the top of the mount 10 and a last pin 150 is secured to and extends upwardly of the plate 148. A head 152 is mounted rearwardly of the mount 10. A U-shaped heel clamping pad 172 and the wipers 12 are mounted to the head 152 for forwardrearward movement. A block 228 is mounted to the head 152.

Referring to FIGS. 3-8, an applicator-hold-down unit 235 is mounted to the block 228. The unit 235 comprises a rod 236 that is secured to and extends downwardly of the block 228. A housing 238 is secured to the bottom of the rod 236. A flange 239 is secured to the housing 238, and a spindle 240 extends downwardly of the flange 239. The bottom of the spindie 240 is formed into a hold-down foot 242. A pair of hold-down feet 244 (see also FIG. 2) are mounted to and depend from the housing 238 and are located forwardly of the foot 242. A plate 246 is slidably mounted for forward-rearward movement in gibs 248 formed in the flange 239.

A bolt 250 is threaded into a lug 252 that extends from a plate 254, the plate 254 being secured to the bottom of the flange 239. A stem 256, secured to the plate 246, extends between a pair of collars 258 formed on the bolt 250. The rotation of the bolt 250, by a knob 260 secured thereto, thus effects forward-rearward movement of the plate 246.

The bottom of the plate 246 is formed into

regions

262 and 264, the region 262 being at a higher elevation than the regions 264. The

regions

262 and 264 are separated by inclined regions 266 that diverge rearwardly and outwardly along the plate 246. The inclined regions 266 thus separate an operative region defined by the region 264 from two inoperative regions defined by the region 262.

A hub 268 is rotatably mounted to the spindle 240 below the plate 246. A lever 270 is located between the hub 268 and the plate 246. A pair of pins 272 extend from the lever 270 into lugs 274 that are secured to the hub 268 to thus pivot/ally mount the lever to the hub in such a manner that the lever is rotatable with the hub. A first end of the lever is resiliently urged upwardly about the axis of the pins 272 by a compression spring 275 interposed between the lever and the hub to thereby resiliently urge a follower in the form of a ball 276, secured to this end of the lever, against the bottom of the plate 246. The other end of the lever 270 extends between a pair of pins 277 mounted on a valve stem 278. The valve stem 278 is mounted for heightwise movement in the hub 268.

A nozzle 280 extends radially from the bottom of the hub 268 on the opposite side of the hub from the ball 276. The nozzle 280 communicates with

passages

282 and 284 in the hub. The valve stem 278, which extends into the passage 284, in its lower FIG. 5 position blocks communication between the

passages

282 and 284 and when raised from the HO. 5 position to an open position permits communication between these passages. The passage 284 is in communication with a groove 286 formed on the periphery of the spindle 240, and the groove 286 is in communication with

ports

288 and 290 formed in the spindle 240 and the flange 239. The port 290 is in communication with a nipple 292 that is threaded into the flange 239.

Referring to FIGS. 3 and 9, a gear 294, secured to the hub 268, is in mesh with a gear 296. The gear 296 is mounted to a shaft 298 that forms part of an air actuated motor 300 that is mounted to the housing 238. The motor 300 comprises end compartments 302 and 304, a large middle compartment 306 and a small middle compartment 308. The shaft 298 extends into the end compartment 302 and a shaft 310 is rotatably mounted in the compartment 304. A wall 312 separates the compartment 302 from the

compartments

306 and 308 and a wall 314 separates the compartment 304 from the

compartments

306 and 308.

Sprockets

316 and 318, respectively mounted to the

shafts

298 and 310, are drivingly connected by an endless chain 320. One run of the chain 320 extends through relatively large openings in the

walls

312 and 314 and through the compartment 306 and has a relatively large diameter piston 322 secured thereto that bears against the periphery of the compartment 306. The other run of the chain 320 extends through relatively small openings in the

walls

312 and 314 and has a relatively small diameter piston 324 secured thereto that bears against the periphery of the compartment 308.

As shown in FIGS. 1 and 2, a cement melting and pumping mechanism 326 is mounted to the machine frame. Referring to FIG. 10, the mechanism 326, which is constructed similarly to the mechanism of application Ser. No. 840,291 filed July 9, I969, comprises a chamber 328 located beneath a funnel 330. A chamber 332 is located below and in communication with the chamber 328. The chamber 332 is in communication with a passage 334 that intersects a heightwise extending bore 336. A tube 338, fitted in the bore 336, has a port 340 that is in communication with the passage 334. An air operated motor 342 is mounted to the tube 338. The piston rod 344 of the motor 342 is connected to a plunger 346 that is slidably mounted in the tube 338. A port 348 in the bottom of the tube 338 is normally closed by a ball valve 350 that is located in an orifice 352. A compression spring 354 acts to yieldably urge the ball valve 350 into its normal closing position with respect to the port 348. A port 356 provides communication between the orifice 352 and one end of a flexible hose 358.

The end of the hose 358 remote from the mechanism 326 is connected to a filter 360 (FIGS. 2-4), and the filter 360 is in communication with the port 290 (FIG. 6) by being mounted to the nipple 292 (FIG. 4).

In the idle condition of the machine: pressurized air is entering the end compartment 304 of the motor 300 through a line 368 while the end compartment 302 is vented to atmosphere through a line 370 to cause the piston 322 to abut the wall 312 and the piston 324 to abut the wall 314 and thus cause the hub 268 and the lever 270 to be turned to a position wherein the ball 276 bears against the higher region 262, as seen in FIGS. 5 and 7, with the valve stem 278 blocking communication between the passages 282 and 284 (FIG. 5); and the piston rod 344 is retracted into the motor 342 so that the plunger 346 is above the port 340.

Granules of thermoplastic cement, that are solid at ambient temperatures and become molten and adherent when heated above a predetermined temperature, are placed in the funnel 330 of the mechanism 326 and gravitate through the chamber 328 into the chamber 332 where they are melted by an electric cartridge heater 372 (FIG. The molten cement gravitates from the chamber 332 through the passage 334 and the port 340 into the tube 338 to fill that portion of this tube that extends between the plunger 346 and the ball valve 350. The motor 342 is now actuated to reciprocate the plunger 346 a number of times and thus pump the molten cement from the tube 338 through the orifice 352, the port 356, the hose 358, the

ports

290 and 288, and the groove 286 into the passage 284 until it fills the passage 284. During each downstroke of the plunger 346, the movement of the bottom of the plunger below the port 340 causes the ball valve 350 to open and the cement in the tube 338 to be pumped through the port 348 into the orifice 352. During each upstroke of the plunger 346, the movement of the bottom of the plunger above the port 340 enables cement to flow through the port 340 to fill that portion of the tube 338 that lies between the bottom of the plunger and the ball valve 350. At the end of these recipro-cations, the plunger reassumes its idle position above the port 340. An electric heater (not shown) is located in the hose 358 and an electric heater 374 (FIG. 5) is located in the flange 239 to maintain the cement molten between the tube 338 and the passage 284.

Referring to FIGS. 11 and 11A, a shoe assembly comprising a last 376 having an insole 378 secured to its bottom and an upper 380 mounted thereon is placed bottom-up on the last support constituted by the last pin 150 and the plate 148 with the pin 150 entering the thimble hole of the last and the plate 148 bearing against and supporting the top of the heel portion of the last. Preferably, a pulling over and toe lasting operation has previously been performed on the shoe assembly in a machine such as that shown in patent application Ser. No. 858,667 filed Sept. 17, 1969.

In the manner shown in the aforementioned parent application Ser. No. 4l,500 filed May 28, l970, the machine is operated to bring it to the position illustrated in FIGS. 11 and 11A wherein: the shoe assembly is clamped between the plate 148 and the hold-down

feet

242, 244 of the applicator-hold-down unit 235 with the heel seat portion 409 of the insole 378 bearing against the

feet

242, 244; the toe rest bears against the top of the vamp of the upper; the pad 172 firmly engages the shoe assembly and clamps the heel portion of the upper 380 against the last 376 with the heel portion 428 of the upper margin extending upwardly of the insole heel seat portion 409; and the wipers 12 are located proximate to the shoe assembly in position to commence a heel wiping operation.

Prior to the machine parts arriving at the FIGS. 11 and "A position, the motor 342 was actuated to lower the plunger 346 and thus force cement under pressure into the hose 358. The valve stem 278 prevents the cement from exiting from the passage 284 at this time, so that the cement pressure caused by the lowering of the plunger 346 is taken up by the elastic wall of the hose 358.

At this time, the end compartment 304 of the motor 300 is vented to atmosphere through the line 368 and pressurized air is forced into the end compartment 302 through the line 370 to cause the piston 322 to move from the wall 312 to the wall 314 and the piston 324 to move from the wall 314 to the wall 312. This causes the top run of the chain 320, as seen in FIG. 9, to move rightwardly and, through the connection provided by the sprocket 316 and the

gears

294, 296, causes the hub 268 and the lever 270 to swing counterclockwise,

as seen in FIG. 7, about the axis of the spindle 240, through a predetermined arc. The swinging movement of the hub 268 and the lever 270 is terminated when the piston 312 engages the wall 314 and the piston 324 engages the wall 312. During this swinging movement the ball 276 moves along the higher region 262, down the uppermost inclined region 266, as seen in FIG. 7, about the lower region 264, up the lowermost inclined region 266 and back to the higher region 262. At the beginning of the swinging movement, the ball 276 lies above the longitudinal center line of the machine, as seen in FIG. 7, and at the end of the swinging movement the ball 276 lies below the longitudinal center line of the machine. The angles defined by a line extending from the ball 276 to the axis of rotation of the hub 268 and the longitudinal center line of the machine at the beginning and the end of the swinging movement are equal. During the period that the ball 276 moves along the lower region 264, the valve stem 278 is lifted by the lever 270 to open communication between the

passages

282 and 284 and enable the cement under pressure in the passage 284 to be sprayed radially from the nozzle 280.

From the foregoing, it can be seen that no cement is sprayed from the nozzle 280 during its movement through the inoperative zones at the beginning and the end of the swinging movement of the hub 268 while cement is sprayed from the nozzle during its movement in an operative zone in an intermediate portion of this swinging movement. The cement is deposited on the upper margin 428 and/or the periphery of the insole heel seat portion 409 and acts to bond the upper margin to the insole during the below described wiping of the upper margin against the insole. The angular extent of the operative zone during which the cement is sprayed is dependent on the length of the lasting margin that is to be wiped against the insole, and this in turn is dependent on the length of the shoe assembly. ln order to adjust the angular extent of the operative zone for the particular length of the shoe assembly being operated on, the plate 246 is adjusted forwardly or rearwardly by the knob 260 to move the inclined zones 266 forwardly or rearwardly to the desired position.

After the cement spraying operation is completed, the wipers 12 are moved forwardly and inwardly so as to wipe the upper margin 428 against the insole heel seat 409 and bond the upper margin to the insole by means of the sprayed cement. During the wiping operation, the applicator-hold-down unit 235 is raised out of the way of the wipers 12.

After the completion of the machine cycle, the end compart-ment 302 of the motor 300 retains pressurized air through the line 370 and the end compartment 304 remains vented through the line 368. During the next machine cycle, when the cement is to be sprayed out of the nozzle 280, the hub 268 is caused to swing from the position it assumed at the end of the first machine cycle back to the position it had assumed at the beginning of the first machine cycle.

l claim:

1. A cement applying mechanism comprising: a nozzle mounted for swinging movement; means for swinging the nozzle through a prescribed are; means for supplying cement to the nozzle; a control means having a first inoperative region and a second inoperative region that are separated by an operative region, a follower means, mounted for swinging movement with the nozzle, coactive with the control means during the swinging of the nozzle through said are to first coact with the first inoperative region, then coact with the operative region and then coact with the second inoperative region; means so constructing the nozzle, the follower means and the control means as to preclude the spraying of cement from the nozzle when the follower means is coacting with said inoperative regions and to permit the spraying of cement from the nozzle when the follower means is coacting with said operative region to thus provide inoperative zones at the beginning and the end of the swinging movement of the nozzle through said are in which cement is not sprayed from the nozzle and an operative zone that is between said inoperative zones during the swinging movement of the nozzle through said are in which cement is sprayed from the nozzle; and means for so adjusting the control means so as to adjust the angular extent of the operative and inoperative zones.

2. A mechanism as defined in claim 1 further comprising: a hub, mounted for swinging movement, having the nozzle incorporated therein; means for swinging the hub through said prescribed arc to thereby swing the nozzle through said prescribed arc; and a passage in the hub in communication with the nozzle; wherein said means for supplying cement to the nozzle comprises: means for supplying cement under pres-sure to the passage during said swinging of the hub; further comprising: a valve mounted to the hub for movement between a blocking position wherein it blocks communication between the passage and the nozzle and an open position wherein it permits communication between the passage and the nozzle; wherein said follower means comprises: a follower mounted to the hub for swinging movement therewith and for movement with respect thereto so connected to the valve as to effect movement of the valve between said positions; wherein said control means comprises: valve operating means effective to initially maintain the valve in said blocking position during the movement of the nozzle through the inoperative zone at the beginning of said swinging movement of the nozzle, to move the valve to said open position during the movement of the nozzle through said operative zone, and to return the value to said blocking position during the movement of the nozzle through the inoperative zone at the end of said swinging movement of the nozzle; and wherein said means for adjusting the control means comprises: means for adjusting the valve operating means to adjust the positions in said swinging movement in which the valve moves from the blocking position to the open position and from the open position to the blocking position.

3. A mechanism as defined in claim 2 wherein said valve operating means comprises: a plate having said inoperative and operative regions; means yieldably urging the follower against the plate; and means so connecting the follower and the valve that when the follower is bearing against the inoperative regions the valve is in said blocking position and when the follower is bearing against said operative region the valve is in said open position; and wherein said means for adjusting the valve operating means comprises: means for so adjusting the plate with respect to the hub as to adjust the positions in said swinging movement in which the follower is bearing against said inoperative and operative regions.

# i I I

Claims

1. A cement applying mechanism comprising: a nozzle mounted for swinging movement; means for swinging the nozzle through a prescribed arc; means for supplying cement to the nozzle; a control means having a first inoperative region and a second inoperative region that are separated by an operative region; a follower means, mounted for swinging movement with the nozzle, coactive with the control means during the swinging of the nozzle through said arc to first coact with the first inoperative region, then coact with the operative region and then coact with the second inoperative region; means so constructing the nozzle, the follower means and the control means as to preclude the spraying of cement from the nozzle when the follower means is coacting with said inoperative regions and to permit the spraying of cement from the nozzle when the follower means is coacting with said operative region to thus provide inoperative zones at the beginning and the end of the swinging movement of the nozzle through said arc in which cement is not sprayed from the nozzle and an operative zone that is between said inoperative zones during the swinging movement of the nozzle through said arc in which cement is sprayed from the nozzle; and means for so adjusting the control means so as to adjust the angular extent of the operative and inoperative zones.

2. A mechanism as defined in claim 1 further comprising: a hub, mounted for swinging movement, having the nozzle incorporated therein; means for swinging the hub through said prescribed arc to thereby swing the nozzle through said prescribed arc; and a passage in the hub in communication with the nozzle; wherein said means for supplying cement to the nozzle comprises: means for supplying cement under pres-sure to the passage during said swinging of the hub; further comprising: a valve mounted to the hub for movement between a blocking position wherein it blocks communication between the passage and the nozzle and an open position wherein it permits communication between the passage and the nozzle; wherein said follower means comprises: a follower mounted to the hub for swinging movement therewith and for movement with respect thereto so connected to the valve as to effect movement of the valve between said positions; wherein said control means comprises: valve operating means effective to initially maintain the valve in said blocking position during the movement of the nozzle through the inoperative zone at the beginning of said swinging movement of the nozzle, to move the valve to said open position during the movement of the nozzle through said operative zone, and to return the nozzle to said blocking position during the movement of the nozzle through the inoperative zone at the end of said swinging movement of the nozzle; and wherein said means for adjusting the control means comprises: means for adjusting the valve operating means to adjust the positions in said swinging movement in which the valve moves from the blocking position to the open position and from the open position to the blocking.