US2580216A - Device for nailing heels from the interior of shoes - Google Patents

Description

Dec. 25, 1951 v. CHMELAR v2,580,216

DEVICE FOR NAILING HEELS FROM THE INTERIOR OF SHOES 144034 v CHMHAR,

Dec. 2s, 1951 y. cHMl-:LAR 2,580,216

DEVICE OR AILING HEELS FROM THE INTERIOR OF SHOES Filed July 8, 1947 2 SHEETS- Smm 2 z/A CLA V @HMH/1R,

A rra/wv y INVENTOR.

Patented Dec. 25,1951

j; UNITED sur r` DEVICE Foa NALING 11E-ELS FROM THE INTERIOR or sHoEs Vclav Chm'ela'zlin, Czechoslovakia, assigner to Bata, fnarodn' podnik, Zliii, C'z"echoslovalia,A a

Applicatimiys,19e/,semina 759,607.

In ,Germany June 8, 1943 I setion 1,'Pub1ic`L-aw 6'90, Auguste, 1946 n Patent expires June 8, 19637' 'c claims. (olJlls'zV i heels fromk the counter-portion of shoes or the like by nails or equivalent fastening means which are `inserted in tubes or grooves set obliquelywith respect tothe bottom of the counter-portion of f positions as near as possible to the `outer circumi ference, and the shape ofy the driver-fheadrshould be adapted to the. heel portion Vvof the shoe as accurately as possible. The rst condition con; cerning the slope 'of the; fastening means is of great importance for ensuring firm attachment to the heel, particularly with high heels for ladies shoes, whereas the second condition is important for properly positioning the shoe on the driver-head and contributes to Vthe reliabilitygof a perfect attachment of ythe heel aswell as facilitating the work and thereby increasing the rate of'output. w

With known devices it has not been possible to fulfill both of the aforesaid requirements at the same time, the fulfilling of the one having been achieved at the expense of the other. For example, ifv one attempted to adapt the outer shape of the driver-head accurately to the shape of the heel portion ofthe shoe, it was necessary,y

togive to the nails -or other fastening means that were to be driven, lesser slope with respect-t0 thek bottom of the counter-portion of the shoe, and to drive them in at a greater distance from the heel prole.

The use `of flexible v.or like deformable drivers,`

guided'in curved guides to overcome thesevdisadvantages led toY designs which showed many sources of breakdown in operation. 'Moreoverf resilient drivers are subjected to alternating stresses which affect their length of life considerably. v Y Y 7 However, there are known devicesfby which the fastening means are driven in at a sufficient slope with respect `to the bottom of the counterw` the4 correction positioning `of.- the. 'shoe "on fthe ill-5 'This invention relates to devices forsecuring .driver-head diihcultgor 55' theaccompanying drawing;

the driver-head hasto be; appropriately. enlarged in the upperl portion oflthe shoe to befoperated upon, giving up the natural shape :of the heel portion `of the shoe, in order to be capable of housing the drivers, if necessary. i -The said upper portion must be large enough to 'admit the driver-head.A f'

`For example', a device for securing rheels by nailingfrom inside the counter-portion of the shoe has becomeV known in which the drivers slide inobliquely disposed tubes and are equipped with projections guided inguide grooves of a common driverhead; An yinherent disadvantage'of this known" device jconsists' inV the vunfavorable dis-J tribution of thefguides, particularly in the commondriver-head, where jamming may easily 4occur'vvhich, leadsto breakages. The driver=head proper is' much too high in this known arrangei mentand makes the Vadaptation to the shape of the heel di'icult, particularly in respect of the reduction `towards ,the upper portion. YThese unfavorable '"conditions are caused particularly by the f'fact that the supporting .wall ,of the driver head'in which the said tubes are housed possesses substantiallyv 'a thickness' corresponding `toy "the length'o'f these tubes, so that the free space re` quired for the movement of thecommon driverheadhas to be pr'ovidedunderneath the said thick wall whereby` the necessary guide proje'ctions iof the 'drivers'must also be unfavorably longs AAn object of 'the presentinvntion is to remove the above l mentioned drawbacks and deficiencies. To this en'd the invention consistsY in that the guides in' the common driver-plungerfor the pro- `ectioris of the drivers lie at the-beginning of the active stroke of `the plunger, approximately at 'the bases, i. e., iatthe` lower ends of the obliduelydisposed tubes or grooves in `which the'- drivers' are guided, so that 'the said guides movef during fthe entire'active Lstroke of the plunger along the said tubes or grooves and inside thev space .limited by these tubes'or grooves, whereby the drivers themselves are completely and reliably guided .and assume lthe correct slope andf illustrated on driver-head with the driver-plunger in its initial Y position; v

Fig. 3 shows a similar cross section but with, Y

the driver-plunger at the end of its driving stroke; Y

Fig. 4 is a sectional plan taken along the lin 4--4 of Fig. 1, of one of the drivers with its tube or groove Fig. is a sectional top plan view of the driverhead seen in accordance with Fig. 1;

Fig. 6 is a sectional plan of the driver-head taken along the lines 6--6 of Fig. 1; and

Fig. '7 is a sectional plan of the driver-head taken along the lines 1--1 of Fig. 1.

From Fig. l it will be seen that the driverhead is accurately adapted to the shape of a heel, and that it has also a reduction towards the upper portion I6 of the shoe to be operated upon; it consists of an upper part l and a lower part 2.

The upper part I is designated as a hollow body having an upper wall I1 integrally connected with depending lateral walls that contain the tubes 3 for the heel fastening means here shown as nails 4. The tubes 3 form tubular guides for nails in an oblique direction with respect to the upper wall I1 of the hollow body I, each tube 3 being provided with a slot 5 which is open into the interior of the hollow body and through which `slots protrude the lateral projections 6 of the drivers 1 which work in the tubes 3. These projections 6 are guided in transversely extending guide grooves I4 (see particularly Fig. 7) of the common driver-plunger 8, and the grooves are covered by a plate 9 attached to the plunger, for example by means of screws I0, as canbe seen in Figs. l-3 and '7. The said guide grooves I4 are disposed substantially in a transverse plane extending through the bases of said tubular guides 3 when the plunger 8 is at the beginning of its driving stroke (see particularly Fig. 2). The plunger is guided in the lower part 2 of the driver-head and is operated through any known driving device. The upper part I of the head is attached to the lower part 2 by means of screw bolts II and I2; it carries an adjustable support I3 of known kind for supporting the toe portion of the shoe that is to be operated on.

With the illustrated embodiment nine nails can be driven simultaneously. However, since not all of the guide grooves I4 required for the lateral projections of nine drivers can be accommodated in the upper wall of the plunger 8, two of the drivers 1', are extended downwards, so that their lateral projections 6 'lie lower and are guided in grooves I 5 in the plunger underneath thegrooves In Figs. 1-3 the part of a shoe to be'operated upon is indicated in dotted lines whereas I6 designates the hereinbefore mentioned upper portion of the shoe and I8 the heel to be secured.

It will be seen that the guidance of the drivers 1 and 1 by the projections B and E', respectively, is a very favorable arrangement. As indicated in Figs. 1 3 each driver and its projection are combined in the shape of an oblique letter L, i. e. each driver and its projection form arms of an angle, the apex of which lies on the point of intersection of the axis of the retaining tube 3 and the axis of the respective guide grooves I4 or I5, respectively. The disposition of the cavity in which the common plunger 8 moves adjacent to the front of the depending lateral wall at I1a that integrally connects with the upper wal1 I1 permits the drivers 1 (i. e. all the drivers with the exception of the two denoted 1') to be designated very short whereby the guidance of the saine by their lateral projections is made proof against jamming.

The manner of operation of the described device is as follows:

The nails 4 are inserted into the tubes 3 by means of a known device, the shoe I6, I8, to be treated is put on the driver-head, and the plunger 8 is pressed upwards from the position shown in Fig. 2 to that shown in Fig. 3, whereby the drivers 1, 1' are guided obliquely upwards in the tubes 3 andv drive the nails through the bottom of the counterportion of the shoe into the heel I8, the lateral projections 6, 6 of the drivers sliding inwards in the guide grooves I4, I5ztowards the center of the plunger; After the nailing operation 4the plunger 8 returns again, for example under the action of a spring not shown, together withthe drivers 1 and 1 to the initial position shownV in Fig. 2.

While I have described my invention in one of its preferred embodiments I realize that vmodifications 'may be made and I desire that it be understood that no limitations upon my invention are intended other than may be imposed by the scope of the appended claims.

I claim:

1. In a device for securing the heels of footwear by fastening means such as nails driven into the heel from the interior of the footwear, the combination of Va hollow body shaped for reception of the counter-portion of the footwear, said hollow body having a cavi-ty therein terminating in depending iateral side walls and a depending front end wall, 4tubular guides for the fastening means extending'in the body obliquely with respect to the front end wall of the cavity, said tubular guides `having longitudinally extending slots therein opening into the interior' of the hollow bodyfdrivers slidable in the tubular guides, lateral projections on the drivers extending through the slots in said tubular guides, and an operating plunger common to said drivers the lateral projections on said drivers being disposed in transverse planes extending through the bases of the slots Vin said tubular guides when the plunger is 'at the beginning of a driving stroke, said drivers being conned in linear paths through said tubular guides by coacting guide grooves vin said plunger during `an entire driving stroke o-f the plunger.

2. A device for securing the heels of footwear by fastening means such as nailsrdriven into the heel from the interior of the footwear as set forth in claim l in fwhich each of said lateral projections form with its associated driver the shape of an obliquely arranged letter L the'apex of the angle of which lies in the point of intersection of the axes of the tubular guides and the axis of the respective guide grooves.

3. Av device for -securing the heels of footwear by fastening means such as nails driven into the heel from the interior of the footwear as set forth in claim 1 in which the front end wall of the cavity in the hollow body has a plane surface disposed at' an oblique angle to the top ofv the cavity in the hollow body.

4. A device for securing the heels of vfootwear by fastening means such as nails driven into the heel from the interior of the footwear as set forth in claim 1 in which each of the lateral projections form with its associated driver the shape of an oblquely arranged letter L, the apex of the angle of which lies in the point of intersection of the axes of the tubular guides and the axis of the respective guide grooves and wherein said plunger has a side wall disposed at an oblique angle and operative to approach the front end wall of said cavity as a limit as said plunger imparts driving force to said drivers.

5. A device for securing the heels of lfootwear by fastening means such as nails driven into the heel from the interior of the footwear as set forth in claim 1 in which the hollow body has the external lateral side surfaces thereof shaped to conform with the counter portion of the footwear and wherein the top surface of said hollow body serves as a support for the footwear.

6. A device for securing the heels of footwear by fastening means such as nails driven into the heel from the interior of the footwear as set forth in claim 1 in which each of said lateral projec- 6 tions form with its associated driver the shape of an obliquely arranged letter L the apex of the angle of which lies in the pointl of intersection of the axes of the tubular guides with the axis of the respective guide grooves, said lateral projections being held to the top of said plunger and movable in a Vertical path to a position approaching the under side of the top of the hollow body.

CHMELA, VCLAV.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS Number Name Date 1,975,648 MacDonald Oct. 2, 1934 FOREIGN PATENTS Number Country Date 56,586 Denmark Aug. 7, 1939 408,210 Great Britain Apr. 3, 1934 537,750 Germany Nov. 6, 1931

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