DE1185509B - Shaft tensioner for shaft boots - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: A43d

German: 71c-3/14

Number: 1185509

File number: V 23745 VII a / 71 c

Filing date: March 5, 1963

Opening day: January 14, 1965

The invention relates to a shaft tensioner for shaft boots, in particular riding boots, of the two essentially semi-cylindrical shaped bodies opposite one another with their inner surfaces which are pressed apart by springs and against each other by a device are adjustable.

Such a shaft tensioner is known, in which two approximately semi-cylindrical fittings by two Bow springs are pressed apart, the riveted with their free ends to the fittings are and are axially adjusted by a screw in the area of their central parts arched against one another can. If you press the middle parts of the bow springs apart by the screws, so are the molded parts spread apart while tensioning the boot shaft while they are off the shaft can be removed again by reversing the actuation of the screw. In this gear arrangement, however, the adjustment path of the molded parts is relative to one another small with a relatively large actuation path on the screw. Inserting and removing the Shank tensioners are therefore equally troublesome.

In contrast, the object of the invention is to make a shaft tensioner so simple and expedient that that clamping and removing each with little effort, but above all in can be carried out comfortably in a much shorter time.

This is primarily achieved in that the adjusting device has two scissor arms which each with their one end are hinged to the shaped bodies and between their ends to one another, and that both a spring urging the scissor levers apart and a device are provided are, which the shaped body against the spring force at a smaller or larger distance from each other holds.

When using the shaft tensioner, the two approximately semi-cylindrical shaped bodies are through Compression of the upper ends of the two scissor parts against the action of the spring against each other approached and can then be inserted into the shaft of the boot; then you leave the two Scissor parts diverge again, whereby the two shaped bodies are attached by the force of the spring the shaft of the boot can be pressed on from the inside. Pressing the upper ones together again Scissor parts brings the moldings closer together again and allows easy pulling out of the Shaft tensioner.

Shaft tensioner for shaft boots

Applicant:

Vic-Tree Products (Birmingham) Ltd.,

Birmingham (Great Britain)

Representative:

Dipl.-Ing. R. Beetz

and Dipl.-Ing. K. Lamprecht, patent attorneys,

Munich 22, Steinsdorfstr. 10

Named as inventor:

Joseph Edward Hyams, Birmingham

(Great Britain)

Claimed priority:

Great Britain 17 March 1962 (10 309)

A pawl that can be moved by a finger and has the shape of a gravity-driven Has self-acting detent lever, is preferably used by the fingers of the importer Hand to move the upper ends of the scissor arms and thus the molded body in the compressed and / or to hold it in the fully open position.

The invention is illustrated in the drawing by an embodiment of an inventive trained shaft tensioners for boots, in particular riding boots, explained in more detail; in the Drawing shows

Fig. 1 is a longitudinal section through the shaft tensioner in that position in which its molded body have come closer to each other,

FIG. 2 shows the shaft tensioner according to FIG. 1 in its open position in which he cocks a boot leg, and

F i g. 3 shows a cross section along section line 3-3 of FIG. 1.

In the exemplary embodiment according to the drawing, the shaft tensioner designed according to the invention has two shaping tensioner bodies α , which essentially each have the shape of half a hollow cylinder, but are slightly beveled from their upper to their lower end. Somewhat below the center of the shaped bodies α are centrally opposite one another, for example, on their inner sides

409 768/67

U-shaped arranged tabs carrying brackets a ¹ set, which contain holes in the two tabs through which a hinge pin α ² passes, to which the lower ends b ^{1 of} the arms b of a scissors-like movement device are articulated, which in turn has an approximately U-shaped profile and whose open profile sides face each other. Between the lower sections of the two scissor arms b a tightly wound, arcuately curved helical spring c is arranged, the ends of which are fixed ^{to bent tabs δ 2 of} the lower portions of the scissor arms b. The curved helical spring urges the ends b ^{1 of} the two scissor arms b and thus the shaped bodies α apart.

Upper ends b ^{s of} the two scissor arms b crossing each other in a joint - whose U-profile legs are directed outwards - have outwardly curved flat hook parts 5 ⁴ at their ends, which serve as handles for the fingers of the hand used for actuation. At one of the upper sections of the two scissor arms are a pawl d articulated, which ^{penetrates a slot fe 4} in the other upper scissor arm part. This pivot pawl has two latching projections d ¹ and d ² , which can snap into place on the edge of the slot, whereby the two scissor arms b can be held together in the closed position and (when the latch d ^z becomes effective) the two molded bodies in their furthest clamping position according to FIG 2, in which the scissor arms b are wide open. The latching pawl works preferably by gravity; it has a handle approach d ^s which can be moved by a finger and which is positioned so that two fingers ^{grasp the curved end parts δ 4} and one of these can also reach the pawl d when it is to be released. The handle attachment d ^s protrudes laterally over the outer edges of the upper sections of the scissor arms b.

When using the shaft tensioner designed according to the invention, the two upper sections of the scissor arms b are pressed together by hand, the pawl d falling down under the force of gravity and holding the scissor arms in the compressed position against the force of the spring c (Fig. 1). In this position of the tensioner, the closely spaced molded bodies α are inserted into the shaft of the boot. The pawl d is then raised and released by pressing its free end d ^{3 with a finger;} the spring then pushes the shaped bodies apart, which are resiliently applied to the inner surfaces of the boot shaft and smooth and tighten it, ie keep it in the desired shape.

If the tensioner is to be removed from the shoe upper, the handle parts ö ^{4 of} the two scissor arms b are pressed together and the gravity pawl d engages in such a way that its first detent d> becomes effective. The latter defines the position in which the shaped bodies a lie close to one another and allow the tensioner to be easily pulled out of the shoe upper.

Between the bolts « ² , the lower ends of the scissor arms b and the lower continuations of the hinge brackets α ¹ , which are attached to the inside of the approximately semi-cylindrical shaped body α , a leaf spring, which is bent in the shape of a loop, is switched on, with a lower force in the sense of closing affects of the tensioner and the moldings "keeps parallel to each other during the pivoting movements of the scissor parts and essentially so that they in spite of their single-axis articulation on the lower ends of the scissor parts b are each in the correct import and clamping position remain.

Claims (5)

Patent claims: 1. shaft tensioner for shaft boots, in particular riding boots, which has two essentially semi-cylindrical shaped bodies opposite one another with their inner surfaces, which are pressed apart by means of springs and are mutually adjustable by a device, characterized in that the adjusting device has two scissor arms (b) , each of which with their one end (b ¹ ) are hinged to the molded bodies (α) and between their ends to each other, and that a spring (c) pushing the scissor levers apart and a control device (d) are provided, which the molded bodies (ä) against the spring force keeps at a smaller or larger distance from each other. 2. Shaft tensioner according to claim 1, characterized in that a relatively long helical spring is provided as the spring, the ends of which are fixed to the lower ends (b ¹ ) of the scissor arms (b) and which in the U-profiles facing each other with their open sides Scissor arms (b) is housed. 3. Shank tensioner according to claim 1 or 2, characterized in that the upper ends (b ^s ) of the scissor arms (b) have hook-shaped curved finger grips (& *), under which a pivotable pawl (d) is provided, which the tensioner in a closed or expanded position against the force of the spring (c). 4. Shaft tensioner according to one of claims 1, 2 and 3, characterized by additional springs (e) which are arranged at the connection point of the lower arm ends (b ¹ ) with the shaped bodies (α). 5. Shaft tensioner according to claim 4, characterized in that as additional springs (e) loop-shaped curved leaf springs are provided, which between a pivot pin (α ² ), an articulated connection of the scissor arms (b) with the shaped bodies (α), the ends (b ¹ ) these scissor arms (b) and hinge brackets (α ¹ ) are inserted into the molded body (a) and hold the molded body in an approximately parallel position to one another. Considered publications:
U.S. Patent No. 2,105,395. 1 sheet of drawings 409 768/67 1.65 © Bundesdruckerei Berlin