DE2851016A1 - SAFETY SHOE - Google Patents

Description

The invention relates to a fuse insert shoe with a trip switch housed in its housing, which is provided with a safety device that switches off when a fuse is inserted into the insert shoe will.

It is known to implement the safety device in such a fuse link shoe that one arranges a hook on an element, which by inserting a fuse to a sufficient extent in the fuse link shoe can be adjusted. The hook prevents the movement of the manual control element of the trigger switch Switching on is required. The known safety device is insufficient in that it prevents one Pulling the fuse from the fuse link shoe in the switched-on position of the trigger switch the manual operating device must be designed in a special way as a cap to keep the fuse in the switched-on position to cover. This cap causes a malfunction when replacing the fuse.

Another shortcoming of the known fuse insert shoe is that when the manual control element is pressed in there is a risk of the safety device becoming unusable.

The above-described disadvantages of the prior art are according to the invention solved in that the safety device includes a triangle defining adjustment arm t rotatably mounted on a fixed axis of rotation, which is the first vertex of the triangle, wherein the adjustment · arm in a second vertex the triangle provides a pressure point for setting a breaker contact member against the action of a spring and in the third vertex of the triangle provides an engagement point for a connecting member which is connected to the manual operating member of the trip switch;

909822/0795

-that the manual operating member is rotatable on a second fixed axis of rotation is mounted; that the adjustment arm consists of two parts / which are rotatably connected by a free shaft are whose axis - in a predetermined mutually locked position of the two parts - within of the triangle is in the angle / which has the pressure point and a locking device at its apex, the one of the two parts defines two vertices of the triangle and the other defines the third vertex; that the locking device with a single degree of freedom mounted on one part and one that locks the two parts in the interlocking device includes; and that the safety device is also an unlocking device having a degree of freedom in the housing, which is required by a spring in the unlocking Position held and in a free position of the locking device with sufficient insertion of the fuse can be brought against the action of the spring.

It is particularly advantageous if, in a further embodiment of the invention, a further unlocking device with a single degree of freedom provided in the housing and from the outside for lifting the locking device in addition to the automatic Actuation is actuatable.

In the following the invention will be based on the drawings, for example explained in more detail. The drawings show in

Fig. 1 is an interior view of a fuse link

shoe according to the invention; and in

Fig. 2. a modified embodiment.

In Fig. 1, the construction of a safety insert shoe with built-in trigger switch according to a first embodiment

- 6 -

909822/07 9 5

-form of the invention shows from the inside, the parts of the fuse insert shoe, the trip switch and the safety device are shown in a part of a housing, which consists for example of a plastic material. In both embodiments, the fuse , which is indicated by dashed lines, is in an operational state.

In addition, the trigger switch is on Condition reproduced.

The trigger switch contains a switch 1 with a pivotable connecting arm 4, which is for a restricted Rotary movement is mounted on a fixed pivot axis 3. A manual switch 2 is also provided.

The switch 1 is connected to the arm 4 with the aid of a chain link 5 or a similar connecting element eccentrically connected to the fixed axis of rotation 3, connected to an adjusting arm which is composed of two parts 6, 7 is. This adjustment arm is rotatably mounted on a fixed axis of rotation 9 and the two parts 6, 7 are rotatable connected to one another by means of a free shaft 10.

The two parts 6, 7 form an adjustment arm suitable for use on the trigger switch when they are in interlocked position are, for which a pawl 8, which is rotatably mounted on the fixed axis of rotation 9, about

Part
one end part of the / 6 folds, which is designed as a flat hook and is blocked by a lock 11 which protrudes in the transverse direction from the plane of the hook. The pawl 8 is held in the blocking position by a spring 12 which is arranged in such a way that the adjustment arm is also subjected as a whole to a force which is directed in the direction of rotation about the fixed axis of rotation 9.

9 0 9 8 2 2/0795

'In its locked position, the adjustment arm overflows the Position of the manual switch 2 in relation to a movable interrupter element 15, which in the switched-on position according to FIG. 1 an electrically conductive connection between a terminal 17 and a ground contact member 23 in the room 19 forms in which the fuse is used. When the manual switch 2 is switched to the switched off In the 2nd position, the adjustment arm swivels counterclockwise around its axis and against the action of the spring 12. The pressure point 20, where the breaker contact member 15 and the adjustment arm are engaged, moves as a result a spring 16 substantially to the right according to the drawing, whereby the electrically conductive connection is interrupted.

The adjustment arm delimits or defines a triangle whose corresponding apex passes through the axis of the fixed axis of rotation 9, the pressure point with the breaker contact link 15 and the engagement point 21 of the chain link 5 are defined. The axis of the free shaft 10 on which the rotatable parts 6 and 7 are connected lies within the triangle within the angle assigned to the vertex of the pressure point ζ uge.

When the two parts 6 and 7 are unlocked, the pressure point 20 jumps to the right and thus also the position of the pivot axis 10, so that the length of the triangle side between the vertices 20 and 21 is shortened and at the same time indefinite.

The position of the manual operating member 2 now no longer influences the position of the interrupter contact member 15.

The locking of parts 6 and 7 of the adjustment arm can be interrupted by lifting the pawl 8 out of its locked position will. In the embodiment of Fig. 1, the floor is

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contact member 23 is a leg of a U-shaped member 18 which is free in a housing part 40 of the safety shoe is arranged in the vicinity of the room 19. According to the drawing, the ground contact member 23 is by a spring 25 pressed to the right / which rests against a stop 22 in the housing part 40. The other leg 24 of the U-shaped Member 18 engages the breaker contact member 15 in the switched-on position of the switch. The soil contact link 23 is designed such that when the fuse is removed from the fuse insert shoe, the U-shaped member 18 of the fuse by the action of the spring 25 follows and the ground contact member 23 on a cam 14 on the pawl 8 hits at a certain point in time and thus the pawl 8 is raised from its locked position.

The embodiment of FIG. 2 is identical to the embodiment of FIG. 1 with the exception of the formation of the Unlocking device. The U-shaped member 18 is fixed in the the space 19 adjacent part of the housing 40 is arranged. In the wall of the room 19 there is an unlocking rail 30 which is slidable between surfaces 31 and 32 of the housing. A connecting cam 33 is on Arranged at the end of this rail 30 and protrudes into space 19 before where it rests against an edge 34 of a threaded cap 29 when the cap is screwed into the fuse link shoe is. The unlocking rail 30 is pulled against the edge 34 with the aid of a spring 35. One arm 36 is fixed to the other Arranged at the end of the unlocking rail 30. When unscrewing the threaded cap 29, the arm 36 engages at a certain point in time onto the cam 41 on the pawl 8, which is then lifted out of its locking position when the threaded cap 29 is unscrewed further.

In both embodiments, it is possible to lock the parts 6 and 7 of the adjustment arm from the outside with the help of a

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'v / further unlocking device to be interrupted.

Such a further unlocking device contains, for example, a lever 26 which is rotatable on an axis of rotation 27 is mounted in the fixed housing. The lever eccentrically presses a rod 28 against a cam 13 on the pawl 8 such that the pawl 8 is raised from its locking position.

09822/0795

Claims (1)

i La. ff ί o'c-Ji h ^, ttye'-i 4S90 Herne 1, 8000 Munich 40, Schäferstrasse 18, -. ,. _ _{B u} -, _., _ Eisenacher StraGa 17 P.O. Box 1140 TtipL-Ing. H. H. * ahr _Pa , .. _Anw . _Bel2ler Pal.-Änw. Herrmann-Trentepohl DIf ^ I ~ ^ hV3 Ε "ίϋΐΙί2Γί5 öötzlöf ¹ Telephone: 039/36 3011 Telephone: 0 23 23/51013 [». · £ .- 353012 ⁵¹⁰¹⁴ Dipl.-Ing. W. Herrmann-Trentepohl ^ ³⁰¹³ Telegram response:. . ■. Telegram address: 'Bahrpäiente Herne PAXEf ^ IArJJWA-L ^- CE, 4 λ Babetzpat Munich Telex 08 229 853 / I, O O IU IO Telex5215360 Γ ", bank accounts: Bayerische Verelnsbank Munich 952287 Dresdner Bank AG Hörne 7-520 499 Post check account Dortmund 558 63-407 L ■ ■■. J Ref .: μ 06 4 72 B / ag Please indicate in the answer Please send a letter to: Munich Nederlandse Weber Maatschappij B.V. Parallelweg 41, P.O. Box 30, Coevorden / Netherlands Fuse insert Claims / 1. J safety insert shoe with N. - / trigger switch housed in its housing, which is provided with a safety device which is switched off when a fuse is inserted into the insert shoe, characterized in that the safety device contains an adjusting arm which defines a triangle and which is positioned on a fixed axis of rotation (9) is rotatably mounted, which forms the first vertex of the triangle, the adjustment arm in a second vertex of the triangle a pressure point (20) for setting a breaker contact member (15) against the action of a spring (16) and in ' ¹ The third vertex of the triangle provides an engagement point (21) for a connecting member (5) which is connected to the manual operating member (2) of the trigger switch; that the manual operating member (2) rotatably mounted on a second fixed axis of rotation (3) 909822/0795 - 2 - is; that the adjusting arm consists of two parts (6, 7) which are rotatably connected by a free shaft (10) whose axis - in a predetermined mutually locked position of the two parts (G, 7) - lies within the triangle at the angle which has the pressure point (20) and a locking device at its vertex, one (7) of the two parts defining two vertices of the triangle and the other (6) defining the third vertex; that the locking device is mounted with a single degree of freedom on one part (7) and contains a device that holds the locking of the two parts (6, 7) in the mutual locking position; and that the safety device is also an unlocking device with one degree of freedom in the housing, which is held by a spring in the position required for unlocking and can be brought into a position free of the locking device when the safety device is sufficiently inserted, the action of the spring can be brought . 2. fuse insert shoe according to claim 1, characterized in that the unlocking device a free bottom contact member (23) which forms the bottom of the space available for securing, and a spring (25) comprises which the free electrode contact member against a contact surface of the fuse during removal of the Keeps fuse-link shoe under pressure. 3. fuse insert shoe according to claim 1 or 2, characterized characterized in that the unlocking device is in the longitudinal direction of the side wall of the housing for a member (30) arranged for securing available space, the one protruding into the interior of this space Connecting cam (33) and a spring (35) carries the connecting cam against the threaded cap for insertion of the Keeps fuse under pressure. - 3 2 2/0795 4. fuse link shoe according to one or more of the preceding claims, characterized in that that the locking device is a pawl (8) which is rotatably mounted on the fixed axis of rotation (9), on which the adjusting arm (6, 7) is rotatably mounted. 5. Fuse shoe according to one or more of the preceding claims, characterized in that a further unlocking device (26, 27, 28) is provided with a single degree of freedom in the housing and can be actuated from the outside to lift the locking device (8) is. 9098 ?? / D795