DD209729A5 - ladies' sandal - Google Patents

Abstract

The invention relates to a women's sandal of good quality and yet low production costs, which is produced by the combination of simple, prefabricated spray elements that can be easily and quickly mounted and for which no special machinery or skilled work is necessary. Simplicity and speed of assembly of the sandal in question are due essentially to the presence and use of a rigid, injection-molded insert, which is applied to the underside of the insole and serves as a support and centering element for the paragraph, said paragraph by a Pressure pin, which is pushed through the bottom and leads up into a perforated web, which protrudes from the underside of said rigid insert, is attached.

Description

15 577 56> _

Damenaandale Field of application of the invention;

The invention relates to a women's sandal of good quality and yet low production costs, which is produced by the combination of simple, prefabricated spray elements that can be easily and quickly mounted and for which no special machinery or skilled work is necessary.

Characteristic of the known technical solutions;

As is generally known, the production of a conventional sandal is based on an insole which

is a multi-layered pressed cardboard or other suitable synthetic material and is already framed, i. enclosed by a marginal strip which extends under the edge of the insole · According to the conventional methods, the front leaf, which in this case consists of a series of transverse strips covering the metatarsophalangeal joint and the toes, is attached to said insole.

The front sheet is folded under the insole and usually fixed by gluing; then the outsole is applied to the underside of the insole, and finally the heel is centered and fastened by means of special machines.

The manufacture of the sandal is completed by gluing another thin surface layer to cover the heads of the nails used to secure the heel. «

The most complicated operations are certainly the centering and fixing of the heel, which requires special machines and skilled workers.

Object of the invention:

Said operations are substantially simplified in the manufacture of the sandal according to the present invention, as will become apparent from the detailed description.

Explanation of the essence of the invention; Simplicity and speed of assembly of the concerned

otindals are essentially due to the presence and use of a rigid, injection-molded insert which is applied to the underside of the insole and serves as a support and centering element for the heel _# which is secured by a pressure pin which is cut through the bottom is and leads up in eh pier, which protrudes from the sole of the said deposit. By using this system, the heel does not need to be centered anymore, it is rather self-centering, and also final layer can be omitted since the insole is not nailed to the axle.

Embodiment:

Further details and advantages of the invention will become apparent from the following description, which refers to the accompanying drawings, wherein

Fig. 1 is a plan view of the above rigid insert; Fig. 2 is a bottom view of said rigid insert; Fig. 3 is a section on the line II-II of Fig. 2;

Fig. 4 is an exploded side elevational view showing the sandal of the present invention;

Fig. 5 is a section through the attached to the insert paragraph and

Fig. 6 is an embodiment of the finished sandal.

Reference is made to Figs. 1, 2 and 3. The rigid insert 1. consists of a molded plastic material, which is precisely matched to the insole, which is glued either on top of said rigid insert 1 or

can be placed in the mold before the plastic material is injected in order to obtain a single element, consisting of the insole and the rigid insert.

The front end of said rigid insert 1 is substantially conically shaped and narrower than the insole to form in the middle a tongue JIa on which the longitudinal arch of the foot terminates. The main reason for this conical shape is the need to create a free space or gap under the insole so that the front sheet can be inserted and fastened without the cut of the finished sole after the outsole is placed under the insert 1 and the insole ίϊ enlarge.

Said rigid insert JL is bordered by a thin edge strip ЗЛэ, which is beaten down, gluing the fabric or leather edge to the insert.

It is emphasized that said edge strip 3Jb comes down flat, not inclined, to form a substantially rectangular step jLc on the underside of the insert 1 .

Along and below said edge strip Ib, a dense series of small holes Id receives the drops of thread-like adhesive which is typically used in automatic flanging machines.

Finally, the said rigid insert 1 at the rear end has a conical web 1e, which resembles a small step and receives the actual paragraph 2 , which has a cavity £ a, which is exactly like the said web Ie 9 ^e ~ formed.

An axially and perfectly perpendicular hole If , which has a bottom cross section of larger diameter and an upper cross section of smaller diameter,

leads through the bridge Ie ,

With reference to Figure 4, the sequence of the manufacturing operations required to mount the sandal of the present invention will be described.

After the insert 1 has been secured to the underside of the insole £, either by gluing or by injecting the insole onto the insole as described above, flanging can be done on the conventional automatic machines, but with respect to uniformity and durability Gluing far better results can be achieved, which is due to the thin edge strip and the dense series of holes IcI.

After attaching the front sheet or strap of the sandal in a conventional manner, the outsole 4 is applied, which is exactly matched to the insole i $ and is interrupted transversely at the height of the web JLe, to which it connects closely,

If paragraph 2 has been pushed to exact fit on web Ie, the transverse edge of the outsole 4 is fastened between the heel £ and the insert I ^ , while the upper edge 2b of the heel is fastened exactly to the covered edge of the insole Matches.

Since the bridge JLe coincides exactly with the cavity 2e_ of paragraph 2, it is automatically and slightly centered without requiring special attention or skill.

It is emphasized that the upper edge £ b of paragraph 2 is inclined inwardly towards the center so that after assembly between said step £ and the inner edge of the heel there remains a gap to accommodate the crimps, which otherwise would be uniform normal sticking between the

Would prevent components. According to conventional methods, these wrinkles, which form in the crimped fabric or leather, must be cut off.

Paragraph 2 is definitively fixed by a pin 5 which may be knurled or ribbed and inserted into the lower end of the heel where it passes through the hole 2 £ which terminates in the upper cavity £ a.

The pin £ j slides easily into the hole Zc ^ and the first part of the hole rf and remains stuck only at the end of the insert, whereby an easy and quick installation of the sandal is supported. The shoulder 6 can either be pushed into the pin E> as shown in the attached drawing, or be a part of the said pin 5.

According to another preferred embodiment, the web Ie may be discontinued instead of the conical shape resembling a truncated cone, the cavity 2j3 being shaped in paragraph 2 in the same way.

In fact, this second preferred solution guarantees a safe and faster centering, the contact between adjacent surfaces remaining even if, due to an unfortunate coincidence, the shoulder 2 has not been pushed completely onto the web JLe.

It is to be understood that the present specification is only that of a preferred embodiment of the sandal of the present invention and that, above all, its structural details may be modified or altered by competent manufacturers without departing from the basic concept of the invention.

It is also obvious that the rigid insert JL is not suitable for making other types of footwear

Only for sandals, it can be used as it will always simplify and accelerate the assembly of the components, resulting in easier centering and fixing of the heel on the one hand and the elimination of the insole covering layer to hide the nails with which the heel on the sole is attached, on the other hand is due.

Claims (8)

LKPINUUNGdANSPRUCH: 1. ladies' sandal, easy and quick to assemble / characterized in that a rigid insert which is produced from plastic by injection molding, is fixed to the underside of the insole, said insert has a ridge projecting from the rear part to the to hold and center the actual heel of said sandal, said heel having a cavity adapted to said web to allow automatic centering of the heel, which is first slid onto said web and then secured with a push pin which passes through the heel from the bottom to the top and is guided into a hole, which is present for this purpose in said web. 2. Women's sandals according to item I ₁ daduch characterized in that a rigid insert is present, which has a profile which is completely adapted to the profile of the overlying insole, but of which it rejects by narrowing in accordance with a zone in which the longitudinal curvature of the Foot ends. 3. Women's sandal according to item 1, characterized in that a rigid insert is provided with an edge spreading, which is flat and not inclined, so that a substantially rectangular step is formed on the underside of said rigid insert. 4. Women's sandal according to item 1, characterized in that the rigid insert has a dense series of small holes under said edge strip, 5. A women's sandal according to item 1, characterized in that there is a rigid insert with a web which protrudes from the rear portion of said rigid insert. said web having an axial and perfectly vertical hole having a lower portion of larger diameter and an upper portion of smaller diameter. 6. A women's sandal according to item 1, characterized in that there is a shoulder with an inwardly inclined upper portion leading into the central cavity, which in turn terminates in a hole passing longitudinally through the heel to receive said fastening pin. A women's sandal according to item 1, characterized in that there is a rigid insert with a web projecting from the rear portion according to item 1, said web having no conical shape resembling a truncated cone, but formed by a series of concentric steps, wherein the corresponding cavity in the paragraph is also shaped. 8. Women's sandal according to item I _1, characterized in that the outer surface of the attachment pin for the shoulder on said rigid support is either knurled or corrugated, said pin can be easily inserted into the actual paragraph and in the lower portion of said web and first in the last portion of the longitudinal hole of said web firmly adhering, wherein the shoulder is either pushed into said fixing pin or is an integral part of said pin. For this 2 sheets of drawings «