EP0880198A2 - Frame clamp for connecting an electric conductor - Google Patents

Abstract

The frame or loop clamp has a box-type tubular cover (1) which is attached to a switching device and is used to connect electrical conductors and consists of a clamp body (2), a clamping yoke (3) and a clamping bolt (4). The frame clamp is inserted into the clamp cover and latches into it via its yoke in the open state. Protrusions (6) on the inner wall of the clamp cover hold the clamp body away from the latched yoke until the clamp screw is tightened. Ribs with rear recesses (8) are used to latch the frame clamp to the inner walls of the clamp cover.

Description

The invention relates to a box clamp with box-shaped Cover that attaches to a switching device is and serves to connect electrical conductors, consisting of a clamp body, a clamp bracket and a clamp screw, whereby the box clamp can be inserted into the terminal cover and can be locked in it.

A generic box clamp is from the German utility model G 86 09 138.7 already known. Out of frame, Connection screw and pressure piece existing unit is here each inserted into a channel in a cover. The walls of the canal flanking the frame are designed that form resilient arms that in the insertion area of the Engage the bracket and thus after inserting the unit Prevent falling out.

The invention has for its object a frame clamp with a box-shaped cover of the type mentioned above to improve that the frame clamp after locking in the box-shaped terminal cover as long as it is open Condition remains until the clamping screw for connection a conductor is screwed in.

The object is achieved in that the latching the box clamp over its clamp in the open Condition of the box clamp is carried out and on the inner walls of the Clamp cover existing knobs the clamp body from the locked Clamping bracket until the clamping screw is tightened in maintaining the open state of the box terminal Keep distance.

An advantageous embodiment of the invention exists when Locking of the box terminal on the inner walls of the terminal cover Ribs with undercuts are provided.

It is also advantageous if the ribs have stops. Through the stops, a minimum distance of the engaged Box clamp for the insertion opening for an operating tool guaranteed, causing accidental touch the fully open, possibly under tension Box clamp is prevented.

FIG 1

eine Schnittdarstellung einer Rahmenklemme mit kastenförmiger Klemmenabdeckung in Seitenansicht und

FIG 2

eine Schnittdarstellung der Rahmenklemme nach FIG 1 in der Vorderansicht.

An embodiment of the invention is explained below with reference to a drawing. Show it:

FIG. 1

a sectional view of a box clamp with box-shaped terminal cover in side view

FIG 2

a sectional view of the box clamp according to FIG 1 in the front view.

In Figure 1.2 is a box clamp with box-shaped Terminal cover 1 shown. The box clamp has one Clamping body 2, a clamping bracket 3 and a clamping screw 4 on. The terminal cover 1 has several box-shaped Cavities that are closed at one end and at the opposite Are open at the end. At the top of each tubular Cavity are two ribs 5 with undercuts 8 and stops 7 and in the lower area 2 knobs 6 appropriate. The box terminals are in from the open end inserted the tubular cavity up to the upper stop 7, wherein the clamping bracket 3 on the undercuts 8th the ribs 5 locked. The box clamp is there in the open state. The knobs 6 in the lower area of the tubular cavity serve to clamp the body 2 in the to hold the lower position until the clamping screw 4 is screwed in becomes. This means that until the screwing in Clamping screw 4 of the clamping bracket 3 in an open state the frame clamp maintaining the distance from the clamp body 2 is held. This ensures that the box clamp reaches the customer in the open state and himself not by vibrations, e.g. during transport, automatically screwed into the thread of the clamp body 2. The sprag 2 is held down over the knobs 6 during the Clamping bracket 3 held above the undercuts 8 above becomes. As a result, the threads of the clamping screw 4 are made the thread of the clamp body 2 is kept out and at the same time in the case of an unfavorable tolerance by the one to be overcome Resistance prevents the clamping screw 4 from being screwed in. Instead of the undercuts, there can also be overlaps be used. By locking the clamp 3 in the back The box clamp is preferred in the upper area Clamp cover made of plastic. By the stops 7 on the ribs 5 is a safe touch protection guaranteed, because accidental touching the fully open frame clamp through the insertion opening for the operating tool is not possible.

Although the present invention with reference to the in of the accompanying drawing illustrated embodiment is, it should be borne in mind that this is not intended is, the invention only to the illustrated embodiment to limit, but all possible changes, Modifications and equivalent arrangements insofar as they are from Contents of the claims are covered.

Claims (3)

Box clamp with box-shaped terminal cover (1), which can be attached to a switching device and is used to connect electrical conductors, consisting of a clamping body (2), a clamping bracket (3) and a clamping screw (4), the frame clamp being inserted into the terminal cover (1) can be inserted and locked therein, characterized in that the box clamp is locked via its clamping bracket (3) when the box clamp is open and knobs (6) on the inner walls of the terminal cover (1) remove the clamping body (2) from the latched clamping bracket ( 3) until the clamping screw (4) is tightened, keep a distance that keeps the frame clamp open. Frame clamp according to claim 1, characterized in that ribs (5) with undercuts (8) are provided on the inner walls of the terminal cover (1) for locking the frame clamp. Frame clamp according to claim 2, characterized in that the ribs (5) have stops (7).

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