DE1163067B - Insertion tool for a device for attaching press stud matrices - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN 42Z7ZW PATENT OFFICE Internat. Class: A 44 b

EDITORIAL

German class: 44 a - 61/10

Number:
File number:
Registration date:
Display day:

S 77163 VII a / 44 a
December 16, 1961
February 13, 1964

The invention relates to a pull-in tool for a device for fastening snap-fastener matrices, which is attached to the carrier gate by means of a ring provided with push-through staples are, the insertion tool having a central guide and alignment pin with a cylindrical, in the free tongue opening retracting guide part and with an adjoining, freely resilient one Ring part receiving matrices as well as a contact shoulder for the Krampenumlenkteil Has die.

Such insertion tools for matrices are known. However, they are not apt to be special Difficulties to be taken into account, which usually arise when something to be attached to the matrices deviate from their normal form. During the production of the matrices it can happen that that certain parts of the spring tongues are slightly bent or deformed. Such a deformation can e.g. consist in the fact that the tongues are twisted, the edge bulges are rolled up imprecisely, deviations be of the size, etc., so that the male part does not snap into place in the correct manner can. Furthermore, there are occasionally small burrs, and tiny ones, on the cut edges of the tongues Metal fragments can sometimes get stuck between the tongues and thereby theirs impede normal movement.

Another difficulty is that the tongues of the die at the first contact with the The patrix does not snap into place properly. It turned out that the tongues when first bent apart are sometimes so stiff that it is difficult to press the patrix in while the second use the snap is done in the correct way.

A main task of the device according to the invention is therefore when attaching the Push-button matrix at the same time to eliminate any impermissible deformations of the same.

Furthermore, the device according to the invention is intended to smooth or remove any burrs that may be present and also bring the tongues into the right shape.

In addition, the tongues should already be bent apart for the first time with the aid of the device according to the invention thereby eliminating their initial stiffness and the difficulty in the first Depression of the patrix is avoided. During this bending process, the possibly between the metal splinters held on by the tongues.

This is achieved according to the invention in that the retracting tool for a device for moving into the free tongue opening
Fastening snap-fastener matrices

Applicant:

Scovill Manufacturing Company,

Waterbury, Conn. (V. St. A.)

Representative:

Dr. W. Schalk, Dipl.-Ing. P. Wirth,

Dipl.-Ing. G. E. M. Dannenberg

and Dr. V. Schmied-Kowarzik, patent attorneys,

Frankfurt / M., Große Eschenheimer Str. 39

Named as inventor:

Michael Joseph Carpinella, Waterbury, Conn.

(V. St. A.)

Claimed priority:

V. St. v. America December 19, 1960

(No. 76 797)

cylindrical guide part and the adjoining part that receives the freely resilient matrixes Ring part have a larger diameter than the untensioned state of the Matrices would correspond, with the central guide and alignment pin on its outer The circumference has an inclined surface which rests on the deflection part or on the ribs of the die comes and wherein the guide and straightening pin is resiliently longitudinally guided in a pull-in sleeve, the lower end of the ring on the staple deflection surface of the die after overpressing one of the guide and Alignment pin comes to rest in an advanced pre-retraction position pre-tensioning retraction spring.

With such a pull-in tool according to the invention, the matrices of the Guide and alignment pin already detected in its advanced pre-retracted position, correctly aligned and preloaded, whereupon the pull-in sleeve is then applied by means of pressure on the deflecting part of the die the fastening of which is effected by bending the staples. An undesirable deformation of the tongues is avoided by supporting them on the corresponding surfaces of the alignment pin.

409 508/20

Claims (1)

3 4 An embodiment of the 26 according to the invention, in particular the one in the inclined surface 27 The drawing-in tool is described below on the basis of the transitioning page, and is essentially the same Drawings explained in more detail. It shows shaped like the upper outer surface of the die F i g. 1 a section through the pull-in tool tongue heads 21. If one or more Matrizenmii inserted snap fastener parts are rotated out of the circular shape before their fastenings 20, as in supply, 20a shown in Fig. 4, this comes at the outer Fig. 2 shows a section similar to Fig. 1, which see the annular groove 26 to the plant, so that the verBeginn of the fastening process shows, tongues 20a formed again by the counter pressure F i g. 3, a section similar to the preceding ones are bent back into the correct position in which Representations of which the insertion tool is arranged in a circle around the opening of the die. End position shows and arranged position. This bending back of the die 4 shows a top view of a push button tongue 20a when the button is lowered die. Guide and alignment pin 12 in the shown in Fig. 3 For attaching snap fastener parts to a showed position, the insertion part 25 with his Pieces of fabric or a pad are inserted two full lengths into the die opening. Here tool parts required - an upper 10 and an at, the outer sloping surface 27 abuts the radial lower 11. The upper pull-in tool 10 has ribs 24 of the die and prevents a wider one Guide and alignment pin 12 and has a res lowering of the guide and alignment pin 12 in this surrounding pull-in sleeve 13, which on the stem reference to the matrix tongues 20 and thus their pel a conventional fastening device for pressure 20 further deformation through the annular groove 26, which otherwise buttons (not shown) is attached. the matrices 20 by excessively strong The guide and alignment pin 12 is within the pressure could bend again. The pull-in sleeve 13 lower part of the pull-in sleeve 13 and is then against the pressure of the spring 16 so long has at its upper end a widened downwardly lowered until it reaches the deflection part 22 of the Head 14, the underside of which normally meets 25 die and thus creates an unyielding resistance a shoulder 15 on the inner wall of the pull-in bearing for fastening the die by bending it over sleeve 13 is applied. The head 14 is formed by one of the clamps 19. This is where the cramps relatively strong coil spring 16, which in 19 of the fastening ring 18 within the curled the cavity in the interior of the pull-in sleeve 13 is completely bent over the edge 23 of the die, finds, pressed against this shoulder 15. 30 so that a firm connection between the die The pull-in device is used to fasten and the fastening ring is produced, whereby Push-button matrices 17 by means of a fastening the carrier material M between the two parts ring 18, which is a number of upstanding staples. 19 has. The die 17 has the usual springy If one or more rolled-up beads of the the matrices 20, which in a rolled-up 35 matrices 20 a do not have the correct shape, The bead 21 ends and is circular around the dies- they become with the help of the cross-sectional shape of the ring opening are arranged around. The Matrizenungen shaped groove 26 covering the outside of the beads entirely 20 are surrounded by a deflecting part 22 which engages around when the guide and straightening pin 12 runs out of a rolled edge 23 and assumes the position shown in FIG. The 40 brought back into shape.
Deflecting part 22 of the die can have radial ribs 24. Furthermore, the resilient die tongues 20, which are shown in FIG. 4 and centered through the middle with the aid of the pull-in tool in relation to the section guided by these ribs 24 according to the surrounding stop surface of the die, so FIGS. 1, 2 and 3 can be seen. that they are aligned coaxially with one another. These As already mentioned, it is possible that the 45 all corrections are made at the same time in the matrix stamping 20 during manufacture in some way of fastening the push button, so that the drawing-in manner has been inadvertently deformed. Such a tool not only the snap fastener parts at an impermissible deformation is, for example, in FIG. 4 base attached, but at the same time also all shown, in which a die tongue 20 a somewhat deformations of the die tongues is eliminated and thus rotated, so that the circular arc-shaped bead 21 on 50 ensures that this end of the tongue does not turn into the circular formation during later use who work flawlessly,
other die heads fits. To claim these inaccuracies in the matrices:
20 a, the pull-in tool has a Guide and alignment pin 12 with a down 55 pull-in tool for a device for protruding insertion part 25, the approximately ko-fastening of push-button matrices, which The niche is designed such that the matrices are provided with a push-through clamp 20 are attached to the penetration of the insertion part 25 between the ring on the carrier material, the Die heads have a central guide and guide over their normal clamped drawing tool Position to be bent outwards. By 60 alignment pin with a cylindrical, in the free this pressing of the insertion part 25 or the tongue opening retracting guide part and Guide and alignment pin 12, the dies with an adjoining, freely springy tongues 20 resiliently bent outwards, so the ring part receiving the matrices already Spread once before practical use. like a contact shoulder for the staple deflection Has at the upper end of the guide and alignment pin 12 65 part of the die, thereby marked this goes into an annular groove26 of about draws that the into the free tongue opening semicircular cross-section over, the outwardly retracting cylindrical guide part (25) and is limited by an inclined surface 27. The ring groove of the adjoining, the freely resilient ma- tricings (20) receiving ring part (26) have a larger diameter than this would correspond to the untensioned state of the dies (20), whereby the central guide and alignment pin (12) on its outer circumference has an inclined surface (27) which comes to rest on the deflection part (22) or on the ribs (24) of the die and the guide and alignment pin (12) in a pull-in sleeve (13) is resiliently longitudinally guided, the lower ring end of which on the Krampenumlenkfläche (22) of the die after pressing one of the guide and aligning pins (12) into an advanced pre-drawn-in position pre-tensioning draw-in spring (16) comes to rest. Considered publications:
U.S. Patent Nos. 2310 008, 2453 990. 1 sheet of drawings