EP0214619A2 - Wiring tool for making low-tension installations - Google Patents

Abstract

The wiring tool consists of a wiring head (12) which is supported via an impact mechanism (20) in a grip (3) such that it can move relative to the grip, can be operated under the influence of a pressure exerted against spring devices (4, 10), and presses a wire into a contact slot in a terminal strip, from which wiring head (12) there protrudes on the inside a ram (2) whose inner end is detachably connected operatively to a slide (8) of the impact mechanism, which is loaded with a compression spring, via a locking slide (7) which can move laterally against the force of a spring (9). In this case, the design according to the invention is such that the locking slide (7) is arranged preferably with a 45 DEG inclination in front of the free end face (2') of the ram (2), provided with the same inclination, on a corresponding end-face sliding surface (8') of the slide (8), the locking slide (7) abutting with a sliding piece (21) onto an opposingly inclined guide surface (22) on the hand grip (3) to generate a transverse slip of the locking slide (7) in the event of axial slipping of the ram (2) until the release of the ram (2) occurs, causing sudden resetting, by entry into a cut-out (23) in the locking slide (7). These measures mean a decisive reduction in the wear on the impact mechanism.

Description

The present invention relates to a wiring tool for low-current plant construction, in particular for the wiring of the terminal strips of distribution systems with cable cores and jumper wires, with a support that is displaceable relative to the handle in a handle via a striking mechanism, under the action of a pressure exerted against spring means Actuable, a wire into a contact slot of a connection element, the wiring head, from which a plunger protrudes on the inside, the inner end of which with a compression spring-loaded slide of the striking mechanism via a locking slide that can be moved laterally against the force of a spring, in a detachable effect connection stands.

Wiring tools of the aforementioned type serve to make work easier when wiring distribution systems and. The like, for example, in transmission technology and telephony, where cable cores and jumper wires are to be connected to a large number of multiple connection strips. Such a connection technology for soldering, screwing and stripping-free connection of insulated conductor wires to the terminal contacts of the terminal strips has been developed by the applicant, which has meanwhile found worldwide distribution under the name VS 83.

Accordingly, there is also a high demand for wiring tools of the aforementioned type.

A major disadvantage of such wiring tools is their short life due to the enormous wear and tear on the striking mechanism, where a locking slide must be moved at right angles to the actuation direction of the wiring tool in order to achieve the desired stroke at the end of the wiring process.

It is therefore an object of the present invention to design a wiring tool of the aforementioned type in such a way that its service life can be decisively increased. According to the invention, this is initially achieved in that the locking slide with a preferably 45 ° inclination is arranged in front of the free end face of the plunger provided with the same inclination on a corresponding frontal displacement surface of the slide, the locking slide being directly or indirectly connected to a stop with a transverse link. and guide surface rests on the handle to generate the transverse displacement of the locking slide upon axial displacement of the plunger until the plunger is released suddenly by resetting through an opening in the locking slide.

As can easily be seen, these measures initially significantly reduce the effective normal forces. In addition, the inclined arrangement increases the contact areas and thus reduces the surface pressure per unit area with the same triggering force, which reduces the friction. However, this also reduces wear on the elements involved.

In order to be able to absorb the sudden restoring force in a distributed manner, an advantageous embodiment of the wiring tool according to the invention resides in the fact that a plunger on the ram on the locking slide forms a counter-guide surface that is axially displaceably supported by a spring on the wiring head and absorbs the sudden restoring force.

This results in an advantageous embodiment in that the locking slide is supported in its direction of displacement by a return spring on the striking head, in which case the transverse link advantageously bears against a counter-inclined guide surface via a sliding piece.

In order to be able to connect so-called installation wires and assembly wires with such wiring tools, which are of different thickness both with regard to wire diameter and with respect to the thickness of the insulation, it is necessary to make the striking mechanism controllable on the wiring tool in order to adapt the wiring process to the wire in question.

This is now achieved according to the invention in that the stop and guide surface is formed by the control cam of an adjusting cam supported on the handle and adjustable in at least two different extreme positions effective in the direction of displacement of the locking slide for earlier or later release of the ram.

With the appropriate design of the cam, these measures can be used to achieve either a multi-stage or an infinitely variable adjustment of the locking slide in its direction of displacement, so that the plunger can enter the opening of the locking slide sooner or later, so that the sudden reset occurs earlier is triggered with less or later with greater restoring force.

Furthermore, the present invention relates to a wiring tool for low-current plant construction, in particular for the wiring of the terminal strips of distribution systems with cable cores and jumper wires, with a support that is displaceably supported in a handle via a striking mechanism under the action of a spring element Pressure-actuated, a wire into a contact slot of a terminal block, the wiring head, which for a centering attachment in front of the contact slot has two crossways to the punch, attachable to the bar, preferably designed as wire clamps, which according to the invention is characterized in that the one stop or Wire clamp is formed by a leaf spring which automatically adjusts the clear width between the stops or wire clamps to different widths of terminal strips.

In order to make the wiring tool even more universal, such a wiring tool for low-current plant construction, in particular for the wiring of the terminal strips of distribution systems with cable wires and jumper wires, is supported with a handle that can be displaced relative to the handle in a handle via a striking mechanism ten, under the action of a pressure exerted against spring means, pressing a wire into a contact slot of a connection element, the wiring head, which is in operative connection with a blade, which performs a transverse movement separating the wire in question around a wire pin against a wire guide edge on the wiring head that the blade is at least between a first position in which its function can be effected by the axial displacement of the wiring head and a second position in which its function can be effected by a lever which is effective on the blade, can be swung out of the housing and can be actuated against the action of a spring, can be moved.

It is advantageous here if the coupling between the blade and the lever takes place via a coupling plate which is pivotally supported on the housing.

This means that the wiring tool can also be used as a normal wire cutter.

• Fig. l das erfindungsgemässe Beschaltungswerkzeug in Draufsicht und im Schnitt durch seine Symmetrieebene;
• Fig. 2 die Anordnung gemäss Fig. l in Seitenansicht und im Schnitt durch seine Symmetrieebene; und
• Fig. 3 die Anordnung gemäss Fig. l mit einer weiteren Ausführungsform des Schlagmechanismus in Teilan­sicht und in grösserem Massstab.

For example, embodiments of the subject matter of the invention are explained in more detail below with reference to the drawing. Show it:

• 1 shows the wiring tool according to the invention in plan view and in section through its plane of symmetry;
• 2 shows the arrangement according to FIG. 1 in side view and in section through its plane of symmetry; and
• 3 shows the arrangement according to FIG. 1 with a further embodiment of the striking mechanism in partial view and on a larger scale.

The wiring tool shown comprises a handle 3, which is preferably formed from two housing half-shells 3 'and 3 ", a so-called wiring head 12 is arranged at the free end of this handle 3, in order to be able to press a wire into a contact slot of a terminal block (not shown in more detail) the wiring head l2 has an indentation stamp l3 which is parallel to the contact slot of the terminal block and is delimited at both ends by transverse stops l4 and l5 which can be attached to the terminal block and are preferably designed as wire clamps. This is known per se and need not be explained in more detail.

It is also known that the wiring head l2 is operatively connected to a blade l6, which points against one of the wire guide edges formed here by the stop l4 executes a transverse movement separating the wire in question about a pivot l8 on the wiring head l2. At the inner end of the blade l6 a link l7 is provided to trigger the transverse movement, in which a pin 5 fixed to the housing engages. In the course of the movement of the clamping process, the movable blade 16 is then pivoted in such a way that the cutting edge 16 'formed at the front end separates the wire at a predetermined distance from the clamping connection.

It is also known that the wiring head 12 is displaceable relative to the handle 3 via a striking mechanism 20 and is supported in the handle 3 under the action of a pressure exerted by hand against spring means 4 10. For this purpose, a plunger 2 protrudes from the wiring head l2 on the inside, the inner end of which is in releasable operative connection with a slide 8 loaded by a compression spring 4 via a locking slide 7 which can be moved laterally against the force of a spring 9.

In order to effectively prevent the previous high signs of wear on the striking mechanism, the locking slide 7 is now arranged with a preferably 45 ° inclination to the plane of symmetry in front of the free end face 2 'of the plunger 2 provided with the same inclination on a corresponding frontal displacement surface 8' of the slide 8 .

Furthermore, the locking slide 7 with a slide 2l rests on a counter-inclined guide surface 22 on the handle housing 3 in order to prevent the transverse displacement of the locking slide 7 during the axial displacement of the plunger 2 until the plunger 2 is released suddenly by entering an opening 23 in the locking slide 7 to generate.

Next is a plunger on the locking slide 7, forming a counter-guide surface 23 ', axially displaceably supported on the wiring head l2 by a spring 10 on the wiring head l2, which absorbs the sudden restoring force Striking head 23 ".

This results in a low-wear, absolutely reliable and simple design of the wiring tool.

In order to be able to use the above-described and of course an already existing wiring tool of the type in question here universally for different connection systems, in particular with connection strips that vary in width, the stop l5 or wire clamp removed from the blade l6 is also provided according to the invention to form a fixed leaf spring on the wiring head l2.

This measure allows the clear width between the centering stops l4 and l5 to be automatically adapted to different widths of connection strips of different systems. In addition, the flexible application of the wiring tool makes it easier to use.

In the case of wiring tools of the type described above, it is customary to convert them on-site from one with an effective wire-cutting function to one without a wire-cutting function.

For this purpose, as described above, a blade l6 is provided which, against an edge at the stop l4 or at the wire clamp, executes a transverse movement separating the wire in question about a pivot l8 on the wiring head l2. This blade l6 is provided at its inner end with a link l7, in which a housing-fixed pin 5 engages. In the course of the movement of the clamping process, the movable blade 16 is then pivoted in such a way that the cutting edge formed at the front end cuts off the conductor wire at a predetermined distance from the clamping connection.

In order to be able to convert this wiring tool into one without a wire separation function, the blade l6 is ver in the longitudinal direction of the wiring head l2 with respect to the pivot l8 between two pivot positions 35, 36 settable, of which the position farther from the wire guide edge l4 'of the wire clamp l4 on the wiring head l2 determines the ineffective position and the closer position 36 the effective position of the blade l6.

In order to make the above-described arrangement even more universal, it is provided according to the invention to make the blade l6 displaceable between the one position in which its function can be effected by the axial displacement of the wiring head l2 and a second position in which its function can be performed by another Blade l6 effective lever 3O can be pivoted out of the housing 3 and actuated against the action of a spring 3l.

In this functional position, the wiring tool can be used as a normal wire cutter.

Here, the coupling between blade 16 and lever 30 is accomplished via a coupling plate 32, which is supported on the housing 3 in an exchangeable manner.

In order to enable the above-described displacement of the blade l6 in the longitudinal direction of the wiring head l2 into the ineffective or effective position in the ineffective position of the lever 30 and the coupling plate 3l which is completely pivoted into the housing, is in the coupling plate 32 a corresponding link 33 for the relative displacement of the link 33 to the housing-fixed pin 5 is provided.

The connection of thicker wires requires a higher wiring pressure on the tool than thinner wires, so that the striking mechanism with thicker wires may only trigger after a greater spring preload has been overcome than with thinner wires. Conversely, the striking mechanism should trigger on thinner wires after overcoming a correspondingly lower spring preload.

To make this possible, the stop and guide surface for the transverse link 7 'on the locking slide 7 is formed by the control track 22' or 22 "of an actuating cam 4l according to FIG. 3.

This control cam 4l is rotatably fastened by means of a locking screw 42 between at least two different extreme positions 22 'and 22 "on the handle 3.

As clearly shown in Fig. 3, here two extreme positions 22 'and 22 "are provided which adjust the locking slide 7 in its direction of displacement so that the plunger 2 later or earlier plunge into the slide opening 23 and thus under the effect of the stronger or less preloaded impact spring 4 can trigger the return stroke. The above results in a wiring tool for low-voltage plant construction, in particular for wiring the connection strips of distribution systems with cable wires and jumper wires, which can be used universally in accordance with the above requirements and is characterized in particular by a low-wear, long service life and fatigue-free operability .

Here, of course, a whole series of modifications to the above-described wiring tool are also conceivable without departing from the inventive concept. In particular, the control cam can also allow more than two extreme positions or allow a continuous adjustment.

Claims (8)

1.Connection tool for low-current plant construction, in particular for the wiring of the terminal strips of distribution systems with cable wires and jumper wires, with one, which can be moved in one grip via a striking mechanism relative to the handle and can be actuated under the effect of a pressure exerted against spring means Wire pushing wire into a contact slot of a connecting element, from which a plunger protrudes on the inside, the inner end of which is in releasable operative connection with a compression spring-loaded slide of the striking mechanism via a locking slide that can be moved laterally against the force of a spring, characterized in that the locking slide (7) With a preferably 45 ° inclination in front of the free end (2 ') of the plunger (2) provided with the same inclination, it is arranged on a corresponding end-side displacement surface (8') of the slide (8), the locking slide (7) having a transverse link (7 ′) directly or indirectly on a stop and guide surface (22) on the handle (3) to produce the transverse displacement of the locking slide (7) when the plunger (2) is axially displaced until the plunger (2) is released suddenly by resetting by entry into a Opening (23) in the gate valve (7). 2. Wiring tool according to claim l, characterized in that a plunger on the locking slide (7), a counter-guide surface (23 ') forming, via a spring (lO) on the inside of the wiring head (l2) axially displaceably supported, the abrupt resetting force absorbing impact head (23 ") is present. 3. Wiring tool according to claim 2, characterized in that the locking slide (7) is supported in its direction of displacement via a return spring (9) on the striking head (23 "). 4. Wiring tool according to claims l to 3, characterized in that the cross plate (7 ') abuts a slider (2l) on a counter-inclined guide surface (22). 5. wiring tool according to claims l to 3, characterized in that the stop and guide surface of the control cam (22 ') supported on the handle (3), in at least two different, in the direction of displacement of the locking slide (7) to earlier or later Release of the plunger (2) effective extreme positions adjustable cam (4l) is formed. 6. Wiring tool for low-current plant construction, in particular for the wiring of the terminal strips of distribution systems with cable cores and jumper wires, with a wiring head which is pushed in a handle relative to the handle and can be actuated under the action of a pressure exerted against spring means and pushes a wire into a contact slot of a terminal bar, which, for a centering attachment in front of the contact slot, has two stops extending transversely to the insertion punch, attachable to the bar, preferably designed as wire clamps, characterized in that one stop or wire clamp (l5) is characterized by an automatic adjustment of the clear width between the Stops or wire clamps (l4, l5) are formed on different widths of leaf spring serving for connecting strips. 7.Connection tool for low-current plant construction, in particular for the wiring of the connection strips of distribution systems with cable wires and jumper wires, with one, which can be moved in one grip via a striking mechanism relative to the handle and can be actuated under the action of a pressure exerted against spring means Wire in a contact slot of a connection element pressing wiring head, which is in operative connection with a blade that against a wire guide edge Wiring head performs a transverse movement separating the wire in question around a pivot, characterized in that the blade (l6) at least between a first position, in which its function by the axial displacement of the wiring head (l2) and a second position, in which its function by a lever (3O) which is effective on the blade (l6), can be swung out of the housing (3) and can be actuated against the action of a spring (3l), can be displaced. 8. wiring tool according to claim 7, characterized in that the coupling between the blade (l6) and the lever (3O) via a pivotable on the housing (3) supported coupling plate (32).

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