US2790971A

US2790971A - Nailing machine

Info

Publication number: US2790971A
Application number: US503311A
Authority: US
Inventors: Hlobil Frantisek
Original assignee: GEN SHOE MACHINERY CORP
Current assignee: GEN SHOE MACHINERY CORP; GENERAL SHOE MACHINERY Corp
Priority date: 1955-04-22
Filing date: 1955-04-22
Publication date: 1957-05-07
Anticipated expiration: 1974-05-07

Description

, y 7, 1957 F. HLOBIL NAILING MACHINE 3 Sheets-Sheet 1 Filed April 22. 1955 IN VEN TOR.

' FRANTISEK HLOBIL ArrOEA/EY May 7, 1957 HLQBIL 2,790,971

NAILING MACHINE Filed April 22. 1955 :s Shee'ts-Sheet 2 EEWH IN VEN TOR.

FRANTISEK HLOBIL A TTOR EYS May 7, 1957 F. HLOBIL NAILING MACHINE 3 Sheets-Sheet 3 Filed April 22. 1955 may; III-Ill "2 5 r RL mm M Nw p 0 EH T V r m MA 5 T N. A R F B /5. Z W E 4 6 a m United States Patent NAILING MACHINE Frantisek Hlobil, Astoria, N. Y., assignor to General Shoe Machinery Corporation, New York, N. Y., a corporation of New York Application April 22, 1955, Serial No. 563,31l 11 Claims. (Cl. 1-32) because not all of the nails are successfully delivered from the block to the jack post. An object of the present invention is to help insure full delivery of nails, and for this purpose I modify the motion of the transfer block'to provide for an appreciable dwell of the block over the jack post, A further object is to devise means for providing such a dwell while utilizingthe mechanism of an already developed and commercialized, machine in which the transfer block is moved with no appreciable dwell by mechanism including a 'crankan'd connecting rod, 'with the'crank driven continuously at theti me' the nails are delivered from the block to the jack'post. 'Thecrank is driven by a single revolution clutch which is engaged by a manually operable lever. The nail jack is hydraulically operated under control of a foot treadle. Further objects of the present inventionare to make the clutch engagement automatic instead of manual; to make this possible in the aforesaid machine; and to make use of the added automatic clutch control optional.

To accomplish the foregoing objects, and such others as will. hereinafter appear, my invention resides in the heel nailing machine elements, and their relation one to another, as are hereinafter more particularly described in the following specification. The specification is accompanied by drawings, in which:

Fig. 1 is a partially sectioned side elevation of the upper part of a heel nailing machine embodying features of my invention;

Fig. 2 is'a partially sectional fragmentary horizontal view taken approximately in'the plane ofthe'line 2 2 dfFig' 1; 1

Fig. 3 is a fragmentary vertical section taken approximately in the plane of the line 3 3of Fig. 4

Fig. 4 is a fragmentary front elevation of parts of the machine near the upper end thereof;

"Fig. 5 is a perspective viewer the upper portion of the machine; r

Fig. .6 is a detail explanatory of a part of the inventionjand f Fig. 7 is a view similar to Fig. 6 but showing a part in retracted position.

Referring to the drawing, and more particularly to Fig. 5, the lower portion of the machine has been omitted, said portion comprising a base, preferably shaped to p'rovide a tank of hydraulic fluid, and a driving motor th? a anva n id' id a Ped a r he right frame 12 rises from said base, and terminates in a head 14 carrying an adjustable anvil 16. The shoe is placed over a nail jack 18 carried by a jack post 29, and the operation of the machine is initiated by a foot treadle 22. Nails are preliminarily loaded into an appropriate nail hopper 24, and are fed to an inverter andthen head first down a suitable number, in this case five nail tubes 26, which lead to a nail delivery station 28. The nails are transferred from delivery station 28 to nail jack 18 by means of a nail transfer block 30, carried by an arm 32 oscillatable on a shaft 34. This transfer operation is powered by crank and connecting rod mechanism located at36, and controlled by a single revolution clutch 38, which may be engaged by means of a manually operable lever 40. The clutch may be driven by a second motor 42, which runs continuously, and the latter also may be used to drive the nail hopper 24. The work being operated on may be temporarily rested on a table or support 44.

Referring now to Figs. 1, 2 and 3 of the drawing, and considering the arrangement in greater detail, the anvil 16 is preferably adjustable on the head 14, as by means of a screw 50. The angle'of the anvil is also adjustable, as by means of a screw 52 moving a cylinder 54 between relatively

inclined faces

56 and 58, the lower anvil part 60 being .pivoted at 62 to the upper anvil part, and being normally urged upward by resilient means, not shown.

The nail jack 18 also m'ay be conventional, it being detachably mounted in the upper end of jack post 20, as by means of a lock screw 64. It will be understood that difierent nail jacks are used for different types and size of shoe, and that the number andarrangement and spacing of the nail holes and the driving pins for the same is appropriately varied from one nail jack to another. The jack post 2Q is raised to bring a shoe, indicated in brokenlines at '66 upward against the anvil.

The upward motion is produced by a piston 68 bearing against a compression spring 70, and when the heel of the shoe reaches the anvil the spring 70 yields, whereupon a stud 72 at the upper end of piston 68'continues rising and bears against a stud depending from the nail driving mechanism in the jack 18. This mechanism comprises a series of nail driving rods, one for each nail, and a plate beneath said rods for simultaneously actuating the same, said plate having a stud which is driven under hydraulic pressure by the stud '72. The return movement of the jack post is aided by pull springs 74, one on each side of the jack post, the lower part 76 of the jack post being stationary, and the upper part 78 being movable. Part 20 may be integral with or may be rigidly fixed to the part 78. In Fig. l the jack post is shownin its lowered position.

Referring now to Figs. 2 and 3, the nail transfer arm 32 carries transfer block 3% these parts being detachably secured together by means of a screw 34, because each nail jack requires a mating transfer block, for the proper number and array of nails. The nail tubes also are detachable and terminate in a changeable delivery plate above the transfer block, for the delivery must mate with the transfer block. Associated with the block 3% is a stop plate 84) (Fig, 3), this'plate being slidable for a limited distance relative to the block, for example by using side guides 82 which are interfitted with the block, as by means of rails and grooves, not shown. A pull spring 84 serves to normally pull the stop plate to the stop position shown in Fig. 2, in which the holes 36 in the stop plate are out of registry with the holes 88 in the transfer block. This is their relation at the nail delivery station shown in Fig. 2, and also during the travel to the jack post, so that the nails are held in the block, but when the block comes over the jack post, an adjustable screw 90 bears against the jack post, as shown in Fig. 3, and moves the stop plate 80 relatively to the left, thereby bringing the

holes

88 and 86 into registry, thus releasing the nails. The holes are also in registry with the holes 92 in the nail jack, and the nails drop from the transfer block 30 into the nail ack.

J The motion of the transfer arm 32 is produced by pulling a flexible strand, in this case a chain 94 (Fig. 2), the end part of which is wound about and secured to a drum or enlargement 96 of the shaft 34. The chain is secured at 98. Return movement of transfer arm 32 is insured by a pull spring 100, which also bends around a drum or enlargement of the shaft when the arm is over the jack post.

Reverting now to Fig. 1, chain 94 is pulled back by the upright arm 102 of an angle lever pivoted at 104, and the horizontal arm 106 of which is actuated by an upright link or connecting rod 108, the upper end of which is connected to a crank pin 110 formed on crank 36. The man ually operable clutch lever 40 is pivoted at 112, and controls toggle-like links 114 and 116 pivotally connected at 118. Link 116 is connected at 120 to a clutch lever 122 pivoted at 124. The clutch is driven by motor 42 through pulley 126, belt 128 and pulley 130. Engagement of the clutch causes the crank pin 11.0 to go through one revolution, which swings the nail transfer arm approximately 180 to the jack post and back again.

As so far described the transfer block would rest over the nail jack for only an instant, but in accordance with a feature of the present invention the block is made to dwell for an appreciable time over the nail jack. Referring to Fig. l of the drawing, I provide a lost motion connection in the linkage leading from the crank to the transfer block. Specifically, theconnection of link 108 to angle lever arm 106 is made slidable, as indicated by rod 132 carrying a knuckle or yoke 133, both of which may move upward relative to arm 106. I further provide resilient means, specifically a compression spring 134, to normal ly take up the lost motion. The tension of the spring may be adjusted by means of lock nuts 136.

A further change is made in the linkage whereby the nail block is moved from the delivery station to the nail jack in less than one-half turn of the crank 36. This may be done by any one or more of a number of changes, such as decreasing the length of the angle lever arm 106, or increasing the length of the angle lever arm 102, or decreasing the radius of the drum or enlargement 96 around which the chain is wound, or increasing the radius at which the crank pin 110 is located on crank 36. Any of these changes will result in the nail block being swung from the loading station to the nailjack in less than a half revolution of the crank.

In practice I prefer to shorten the arm 106, for this part is anyway being changed to receive the lost motion rod 132and spring 134. The yoke 133is preferably connected to a yoke 138 by means of a center block or spider having crossed horizontal pivots, to provide a universal joint. The lower end of connecting rod 108 is secured to yoke 138.

Reverting to Fig. 4, the upper end of the connecting rod 108 and crank pin 110 are shown in broken lines in their normal or rest position, at which time the trans for block is located in the broken line position 30' beneath the nail delivery station 28. When the crank 36 turns, the nail transfer block is swung from the dotted line position 30' to the solid line position 30 over the nail jack 18, and it reaches this position in less than a half revolution of crank 36. In the present case it reaches it when the crank and connecting rod have reached the

solid line position

110, 108. Thereafter the motion of the crank is accommodated by the lost motion connection 132 (Fig. 1) and spring 134 at the lower end of the connecting rod 108, and so the transfer block remains over the jack post until the crank reaches a position 110", symmetrically related to the position 110. The are of dwell is indicated 4 by the curved arrow A, and may be made substantial, as shown.

As so far described the clutch must be engaged by movement of the lever 40. However, in accordance with a further feature of the present invention the clutch is automatically engaged, thus loading the nail jack with a fresh supply of nails as the nail jack reaches its down position following a previous nailing operation. The mechanism for this purpose may be described with reference to Figs. 1, 6 and 7. Lever 40 has connected thereto the upper end 142 of a rod 144 the lower end 146 of which is operatively connected to a trip plate 148 pivoted at 150.. The lower end of the rod may be guided and steadied in a suitable stationary support bracket 152. The trip plate 148 cooperateswith a trip 154 mounted on the vertically movable part 78 of the jack post. The ends of the trip and trip plate are beveled, as shown, so that during upward or nail driving movement the trip 154 simply rides pastthe trip plate 158, the latter tilting upward about the pivot 150. However, on the downward or return movement the trip 154 engages and moves the trip plate downward, thus pulling the rod 144 downward, and so actuating the clutch lever 40.

The trip 154 is so located as to actuate the trip plate as near as possible to its bottom position, so that the nail jack is fully lowered by the time the transfer block moves over it. These parts are anyway arranged for yieldable relative movement, as is indicated by the compression spring shown around the shaft 34 and disposed between the bearing bracket 162 and the drum 96. It will be evident that this arrangement affords upward or axial movement of shaft 34 with the arm. In addition the meeting edges of the transfer block and the nail jack are beveled to facilitate one sliding over the other.

Use of the automatic clutch operation is optional, and to put it out of use I provide means to retract the trip plate. This is best shown in Figs. 6 and 7, in which it will be seen that the trip plate 148 is pivoted on pivots 164 which are eccentrically related to a part 166 which may be turned by a handle 168. The latter may be moved between the down position shown in Fig. 6, which puts the trip plate in forward position, and the up position shown in Fig. 7 which puts the trip plate in retracted position. In the retracted position the trip 154 clears the trip plate, as shown in Fig. 7, whereas in the forward position the trip 154 engages the trip plate, as shown in Fig. 6.

Bracket 152 isstationary, and loosely guides the lower end of rod 146. The latter carries adjustable; lock nuts 147. The rod is loose in a slot 149 in trip plate 148, which slot accommodates the motion of eccentric 166. It also accommodates the upward tilt of plate 148 when the plate is forward and the trip 154 is rising.

It is believed that the construction and operation of my improved heel nailing machine, as well as the advantages thereof, will be apparent from the foregoing detailed description. It' will also be apparent that while I have shown and described my invention in a preferred form, changes may be made in the structure shown, without departing from the scope of the invention as sought to be defined in the following claims.

I claim: t

1. A heel nailing machine comprising a jack post, a nail hopper and nail tubes leading to a nail delivery station, a nail transfer block movable between said delivery station and said jack post to load the same with nails, linkage including a crank and connecting rod to move said transfer block from said delivery station to said jack post and back again, and means to provide a dwell of said transfer block over said jack post, said means including a lostmotion connection in the linkage leading from said crank to said transfer block, and said linkage being so proportioned that the transfer block reaches the jack post before the crank reaches dead center, and thus ease-at 5. remains overthe ja ckjpost until the. crankreaehes a corresponding point on the opposite. side Of deadcenter.

2 A nailing machine comprising a jack post, a nail delivery station, a nail transfer block movable between said delivery stationand said jack post. to load the same with nails, linkage including a crank and connecting rod to move said transfer block from said delivery station to said jack post and back again, and means to provide a dwell of said transfer block over said jack post, said means includinga lost motionconnection in the linkage leadingfrom said crank to said. transfer block, resilient means f normall y taking up said lostumotion, and: said linkage being so proportioned that the transfer block reaches the jack post before the crank reaches dead center and thus remains over the jack post until the crank reaches a corresponding point on the opposite side of dead center, the additional motion of said crank between said two points being taken up by said resilient means.

3. A nailing machine comprising a jack post, a nail delivery station, a transfer block mounted on an arm pivoted to oscillate the transfer block from the loading station to the jack post and back again, linkage including a crank and connecting rod leading to said arm, a return spring operatively connected to said arm, and means to provide a dwell of the transfer block over the jack post, said means including a lost motion connection between said connecting rod and the linkage operated thereby, resilient means normally taking up the lost motion, and said linkage being so proportioned that the transfer block reaches the jack post before the crank reaches dead center and thus remains over the jack post until the crank reaches a corresponding point on the opposite side of dead center.

4. A heel nailing machine comprising a jack post, a nail hopper and nail tubes leading to a nail delivery station, a transfer block mounted on an arm pivoted on a shaft to oscillate the transfer block from the loading station to the jack post and back again, linkage including a crank and connecting rod leading to a flexible strand Wound about and secured to the shaft of said arm, a return spring operatively connected to said arm, and means to provide a dwell of the transfer block over the jack post, said means including a lost motion connection between said connecting rod and the linkage operated thereby, resilient means normally taking up the lost motion, and said linkage being so proportioned that the transfer block reaches the jack post before the crank reaches dead center and thus remains over the jack post until the crank reaches a corresponding point on the opposite side of dead center, the intervening motion of the crank being afforded by said resilient means.

5. A heel nailing machine comprising an upright jack post, a nail hopper and nail tubes leading to a delivery station, a transfer block mounted on a generally horizontal arm pivoted on an upright shaft between the jack post and the station to oscillate the transfer block from the station to the jack post and back again, linkage including a crank and connecting rod leading to a sprocket chain wound about and secured to the shaft of said arm, a return spring operatively connected to said arm, and means to provide a dwell of the transfer block over the jack post, said means including a lost motion connection between said connecting rod and the linkage operated thereby, resilient means normally taking up the lost motion, and said linkage being so proportioned that the transfer block reaches the jack post before the crank reaches dead center and remains over the jack post until the crank reaches a corresponding point on the opposite side of dead center, the intervening motion of the crank being afiorded by said resilient means.

6. A nailing machine comprising a jack post, a nail delivery station, a transfer block movable between said delivery station and said jack post, means including a motor-driven single revolution clutch for moving said transfer block from said delivery station to said jack post 6 and back again, means to raise the jack post a part of a nailingoperation, and means responsive to lowering of 'the jack. post to automatically engage said clutch after each nailing o iaeration.v i

7. A nailing machine. comprising a vertically movable jack post, la nail delivery station, a transfer iblock movable between said delivery station and said jack post, means including a motor-driven single revolution clutch for moving said-transfer block from said delivery station to said jack post and back again, a manually operable lever for engaging said. single revolution clutch, means toraise the ja ckpost asa partof a nailing operation, and

means responsive to lowering "of the jack post to automatically engage said clutch after each nailing opera.- tion, said means including a link extending from said lever to a trip plate, and a trip mounted on a movable part of said jack post and so positioned that it rides past said trip plate on upward nail driving movement but engages said trip plate on downward return movement and thus moves the link to engage the clutch.

8. A heel nailing machine comprising an hydraulically operated jack post, a nail hopper and nail tubes leading to a delivery station, a transfer block movable between said delivery station and said jack post, means including a motor d-riven single revolution clutch for moving said transfer block from. said delivery station to said jack post and back again, a manually operable lever for engaging said single revolution clutch, and optionally usable means to 'automatioally engage said clutch after each nailing operation, said means including a link extending from said lever to a trip plate, a trip mounted on a vertically movable part of said jack post and so positioned that it rides past said trip plate on upward movement but strikes said trip plate on downward movement and thus moves the link to engage the clutch, and manually operable means for retracting said trip plate when desired so that it is not struck by said trip.

9. A nailing machine comprising an hydraulically operated jack post, a nail delivery station, a transfer block movable between said delivery station and said jack post, means including a motor-driven single revolution clutch for moving said transfer block from said delivery station to said jack post and back again, a manually operable lever for engaging said single revolution clutch, and option-ally usable means to automatically engage said clutch after each nailing operation, said means including a link extending from said lever to a trip plate, a trip mounted on a movable part of said jack post and so positioned that it rides past said trip plate on nail driving movement but engages said trip plate on return movement and thus moves the link to engage the clutch, and a manually rotatable earn for retracting said trip plate when desired so that it is not engaged by said trip.

10. A mailing machine comprising a jack post, a nail delivery station, a nail transfer block movable between said delivery station and said jack post to load the same with nails, :a linkage including a motor-driven single revolution clutch driving a crank and connecting rod to move said transfer block from said delivery station to said jack post and back again, a lost motion connection in the linkage leading from said crank to said transfer block, resilient means normally taking up said lost motion, said linkage being so proportioned that the transfer block reaches the jack post before the crank reaches dead center and thus remains over the jack post until the crank reaches a corresponding point on the opposite side of dead center, the additional motion of said crank between said two points being taken up by said lost motion connections and resilient means, means to raise the jack post as a part of a nailing operation, and means responsive to lowering of the jack post to automatically engage said clutch after each nailingoperation.

11. A nailing machine comprising a jack post, a nail delivery station, a nail transfer block movable between said delivery station and said jack post to load the same 7 t with nails, linkage including a motor-driven single revolution clutch driving crank and connecting rod to move said transfer block from said delivery station to said jack post and back again, a lever for engaging said clutch, a lost motion connection in the linkage leading from said crank to said transfer block, resilient means normally taking up said lost motion, said linkage pbeingtso proportioned that the transfer block reaches the jack post before the crank reaches dead center and thus remains over the jack post until the crank reaches 'a corresponding point on the opposite side of dead center, the additional motion of said crank between said two points being taken up by said lost motion connection and resilientmeans,

References Cited in the file of this patent UNITED STATES PATENTS Benjamin Dec. 23, 1930 Gour Apr. 5, 1938 he wr'