DE8120397U1 - "Safety switch" - Google Patents

Description

DipUng.W.Dahfke Dipi.-ing. H.-j. Lippert

Patent attorneys Frar.kenforster Strasse 137 5060 Bergisch Gfadbarfi 3

• ■ I I · *

til I i. . ·

■ I t t # ··

July 7, 1981 D / Ro

Company Hans & Jos. Kronenberg GmbH Bergisch Gladbach "Safety switch"

The innovation concerns a safety switch, in particular for monitoring the closed position of doors, a switch housing with a switch enclosed by it, one guided through the wall of the switch housing Includes ram and a control roller articulated to the ram via toggle levers, which can be pivoted By means of a shaft in an adjacent to the switch housing-

• ■ a Ii

the control housing is arranged with a slot and one of one control vane and one about 90 ° opposite this offset blocking wing has limited sector-like recess, wherein the control housing is assigned an actuating bracket, the front end of which after being inserted into the slot in engage the recess of the control roller and pivot it.

A safety switch of this type is through the DS-GK 76 27 192 became known as a so-called forced contact switching device. There is the switch housing and the one below or Adjacent actuating roller is assigned an actuating claw, which with its angled end into the slot of the housing and then can engage in a sector-like recess in the actuating roller. In particular, was there been proposed to attach the actuating claw on the door leaf, while the switch housing on the door frame of an elevator door was to be fastened.

This known safety switch has now been further developed in two directions; first is instead of the control claw an actuating bracket is provided which, according to the innovation, has a transverse web for pivoting at its front free end of the control vane of the control roller and behind it a window for receiving the locking vane. According to the Yor-

beat the innovation the widths of the locking wing, the slot in the control housing and the window so coordinated that the locking wing when pivoting the control drum into the Window can enter. This innovation is permitted as follows still iiia individual is running, a further improvement of the Safety switch.

can ά, and τ neusx "term safety switch for" sr search are used to monitor the closed position of doors and will also be used preferably for can be about but also also be used as hand-to-use switch.

For mounting on a door, the actuating bracket is attached to its rear End of a base plate with holes for receiving fastening screws and is attached to the door leaf, while the switch housing is to be attached to the door frame, or vice versa.

On the other hand, it is also provided that the actuating bracket carries a handle at its rear end. The operating bracket can then be used as a socket wrench.

To prevent unauthorized switching, for example through bent pieces of wire or the like, to prevent, at least considerably

a ■ «B a

complicate, it is proposed that the crossbar on the front The end of the actuating bracket is designed like a key and that the slot receiving this end in the control housing has a corresponding keyhole profile.

You can now use the switch as a key switch, for example use for disabled people who have difficulty operating an otherwise common key, which initially must be inserted and then rotated. In contrast, the new type of safety switch with a key-like crosspiece of the operating bracket can be used by many disabled people easy to use «Such a switch can be used as a key switch for lifts for the disabled or for other purposes are used and is largely against use by unauthorized persons secured.

It is preferably provided that the profiled keyhole is contained in a cover that is placed on the slot in the control housing.

A particularly advantageous design of such a panel, which also allows the use of different keyholes Otherwise the same safety switch is permitted, is formed by an insert consisting of a keyhole Visor body and one protruding from this, protruding below the control roller into the control housing

ax · β

.Latch "consists.

You can now use inserts with different keyhole profiles keep ready and depending on. ¥ uns in one or the other safety switch insert.

There is preferably a locking tab on the underside of the Tab and a corresponding, this decreasing Hastnut the top of the base plate of the control housing is provided so that after the visor body has been pushed in and locked into place the locking nose is prevented from being removed by unauthorized persons.

ünj also a forcible removal of the visor body It is preferable to exclude the possibility of bending it up with certainty Retaining lugs are provided which protrude from the visor body and into corresponding recesses in the upper delimiting edge of the slot in the control housing. These retaining lugs or, if necessary, only a single one Such retaining lugs then hold the visor body on the front of the control housing immovably. It can only be replaced from the rear by pulling the end of the from the rear wall of the switch by means of a Screwdriver or the like is bent up. In general, however, these safety switches are only used once

• ■ · a ■ ·

I 1

a cover body fitted with a certain keyhole profile and then no longer modified.

The firing is illustrated below in exemplary embodiments the drawing explained in more detail. Show:

Fig. 1 is a longitudinal section through dea. Security switch is inserted operating bracket;

pig. 2 shows a section along the line II-II, wherein however, the bracket is still outside the control housing;

Pig. 3 shows a perspective illustration of the safety switch with a screw-on actuating bracket H;

Pig. 4 shows a perspective illustration of a modified embodiment of the safety switch with a socket wrench-like Operating bracket and keyhole profile;

FIG. 5 shows a section similar to FIG. 1 through the safety holder shown in FIG. 4;

SB. Sill

Fig. 6 is a side view of the insert for the Safety switch in wing. 4 and 5

51g, 7 a plan view of the insert according to FIG Fig. 6.

The safety switch 1 shown in FIGS. 1 ″ to 3 comprises a switch housing 3 and a control housing 4 connected to this Stroke of a tappet (not shown) moving from the control housing can only be stated about aas control housing 4 that a control roller 3, known per se, can be pivoted about a shaft 6 therein. To this control roller e \ n toggle lever is articulated 7, the ram on the top side (not shown) to the already mentioned is articulated. When the control orphan 8 is pivoted counterclockwise, the plunger is raised or lowered again when the control roller is pivoted back.

The control drum carries a door wing 5 and a locking wing 9, which form a sector-like recess of about 90 ° between them.

t · tlllFf fl «

• «9» ·· f fff «

<t * t t. C <

t · «tf (fll

- «fl BIA-II I BI 141

- 8 - j

The control housing 4 has a base plate 11 below the control drum and a front wall 12 with a contactor 13 through which an actuating lever 2 assigned to the safety switch can be inserted. This BetätigungsibUgel has at its front end a transverse web 14 and behind a window 15 · if this actuating bow in the direction 'of arrow in Figure 2 inserted into the slot 13 of the front wall 12 of the la & s Steusrgeliäuses 4 _wir4. reaches the transverse web 14 finally, as shown in Fig. 1, 5. On further pushing forward of the actuating bow 2, the control roller 8 is then counterclockwise comparable · in contact with the control wing pivots. The blocking wing 9, the width of which is dimensioned accordingly, enters the window 15 and does not prevent further movement. If you tried to operate the switch by inserting a sheet metal strip without a window, the locking wing 9 would be on the top of the sheet metal strip! and prevent further insertion and thus pivoting of the control drum. The locking wing 9 also serves to ensure the inevitability of the contact actuation when pulling the actuating bracket 2 out of the slot 13. The transverse web 14 of the actuating bracket 2 presses against the blocking wing 9 and the control roller 8 is pivoted clockwise.

In the embodiment shown in Fig. 3, the actuating bracket 2a is provided with a transverse web 14a and window 15a at its rear end with a base plate 16, the holes 17 for Has mounting screws and on a door i

or a door frame. I.

<<ι ι f ■

In the embodiment of Fig. 4, the safety switch 1 3 differs from the embodiment in Fig. Only by an insert 18 with keyhole 19, while the switch case 3 and the control box 4, and the interior of these two housings are unchanged. In addition, the actuating bracket 2b assigned to the safety switch according to FIG. 4 is designed as a socket wrench in that it has a handle 10 on its rear end. In this socket wrench, the front transverse web 14b is provided with a key profile which corresponds to the profile of the keyhole 19 in the insert 18. The window 15b behind the transverse web 14b is designed and dimensioned in the same way as the window 15a in the embodiment according to FIG. 3.

The formation and insertion of the insert 18 is special can be seen from FIGS. 5-7. The insert consists of a visor body 22 with keyhole 19, which extends to the front of the control housing 4, in front of the slot thereof, and is arranged so that the front transverse web 14b of the socket wrench 2b hits the control wing 5 of the control roller 8 when it is pushed in.

The insert also has a one-piece with the diaphragm body 22 connected tab 20, which aiaflies in the inserted state on the base plate 11 of the control housing. One of

- 10 -

The locking lug 21 protruding from the underside of the tab 20 engages in a corresponding latching groove in the base plate 11 and prevents the insert 18 from being pulled out by unauthorized persons. Also about bending up the visor body and the tab To prevent from the front, two retaining lugs 19 are on the back of the visor body 22 above the keyhole 23 provided, which lay in corresponding recesses in the front wall 12 of the control housing.

Claims (1)

DipUng.W.DaKlke Dipl .-! Ης- H.-l Lippert Pclenian Lawyers
FrGnkcriorster SircSe 137
5060 Bciassd? Gfcdbadi 3 July 7, 1981 D / Ro Protection claims 1 »Safety switch» in particular 2 for monitoring the closed position of doors, which comprises a switch housing with a switch enclosed by this, a plunger guided through the wall of the switch housing and a control roller articulated to the plunger via toggle levers, which can be pivoted by means of a shaft in a single adjacent to the switch housing control housing is arranged with a slit and has a limited by a control vane and a about 90 ° with respect to this offset blocking vane sector-like training ·>] recess, wherein the control housing is associated with a Beicatigungsbügel whose front end after insertion into the slot engage in the recess of the control drum and swivel it, characterized in that the actuating bracket (2) has a transverse web (14) at its front free end for swiveling the control wing (5) of the control drum (8) and behind it a window (15) to accommodate the Has blocking wing (9), and that the widths of the blocking wing, of the slot (13) in the control housing (4) and the window (15) are coordinated so that the locking wing can enter the window when pivoting the control roller. J2. Safety switch according to Claim 1, characterized in that it is I indicates that the operating bracket (2a) at: its rear end has a footplate (16) with no holes (17) to accommodate fastening screws. 3. Safety switch according to claim 1, characterized in that that the operating bracket carries a handle at its rear end. J4. Safety switch according to claims 1 to 3 »thereby characterized in that the transverse web (14j on, the front end of the actuation bracket (2) is designed like a key is and that the slot receiving this end in the control housing has a corresponding keyhole profile. I5. Safety switch according to claim 4, characterized in that j indicates that the profiled keyhole j is provided in a cover that fits onto the slot in the control housing (4) is put on. 6. Safety switch according to claim 5 »characterized in that that the screen is formed by an insert (18) which consists of a keyhole (19) provided visor body (22) and one of this protruding below the control roller (6) in the control housing (A) protruding tab (20). 7. Safety switch according to claim 6, characterized by a locking lug (21) on the underside of the tab (20) and a corresponding one that receives it Locking groove on the top of the base plate (11) of the control housing. 8. Safety switch according to claim 7, characterized by at least one of the visor body (22) protruding into a corresponding recess in the upper boundary edge of the slot in the control housing protruding Retaining lug (23).