EP4049796A1 - Coupling key and adapter - Google Patents

Abstract

The invention relates to a clutch key with a key area (1) on which one or more key surfaces (1.1, 1.2, 1.3, 1.4, 1.5) are formed, the key area (1) being essentially C-shaped and the key surfaces located on a peripheral inner contour of the C-shaped key area (1), wherein- a gripping area (3) is connected to at least one end of the C-shaped key area (1) and/or to a peripheral outer contour of the key area (1)- and the coupling key has at least one adapter element (4) onto which an adapter (6) having a key contour can be detachably plugged, - the adapter element (4) being attached to the handle area (3) and/or to at least one end (1b, 1c) of the C-shaped Is formed key area (1) and / or on the peripheral outer contour of the key area (1).

Description

The invention relates to a coupling key for coupling fire hoses and an adapter.

Such coupling keys are used in particular in the fire service. According to DIN 14 822 (Part 1 and Part 2), coupling keys are standardized which are intended for coupling A, B and C pressure and suction hoses and for connecting to pumps and fittings. These wrenches consist of a handle and a crescent cam. The latter has cams depending on the number of sizes of the clutches to be operated, with the distance between two cams corresponding to one clutch size in each case.

The cams are designed as projections that are rectangular or trapezoidal in cross section.

a in DE 93 14 270 U1 The clutch wrench shown is also used to connect A, B and C clutches. For this purpose it also has cam-like elevations on the crescent-shaped part, which are used to encompass the corresponding clutch size. At the end of a crescent-shaped part, which is turned away from the handle, an isosceles triangle extends symmetrically about the device axis, one tip of which represents the end of the crescent-shaped part 2 . The isosceles triangle has a congruent triangular recess which is used as a key to open and close A, B and C dummy couplers on a pillar hydrant. On one side of the surface of the triangle, an inner triangular sleeve is arranged almost in the middle, which is used to open and close the fall casing of a pillar hydrant.

The inner triangular sleeve is about twice as high as the rest of the clutch key, which is very large overall.

In DE 92 13 406.8 U1 another coupling key for fire brigade fittings is described. This is characterized by the fact that it has an additional cam and is therefore expanded by a clutch size D.

Nevertheless, like the known coupling wrenches described above, it also has a major disadvantage: It is not possible to quickly and purposefully detect a specific coupling size using the cams, since the assignment of the two cams required for attachment to the coupling is not obvious. Usually you only find out the cams that are in the desired distance for the clutch size to be operated by trying them out.

From the pamphlet DE 20 2005 091 741 U1 (own) a coupling key for coupling fire hoses is known, which has a key area consisting of several key surfaces, which is delimited at one end by a stop, wherein a defined key width can be assigned to the stop and one of the key surfaces in such a way that between the stop and the first spanner flat a spanner size corresponding to "Storz D", between the stop and the second spanner flat a spanner size corresponding to "hazardous goods DN32", between the stop and the third spanner flat a spanner width corresponding to "Storz C" and "hazardous goods DN50", between the stop and a key width corresponding to "Storz B" can be detected for the fourth key surface and a key width corresponding to "Storz A" can be detected between the stop and the fifth key surface.

Since speed plays a major role in fire brigade operations, quick coupling of the fire hoses is very important. With the known clutch keys, this cannot be guaranteed to be functionally reliable in some cases.

Another disadvantage is that other elements often have to be actuated, which is not guaranteed with the aforementioned clutch keys.

The object of the invention is to create a clutch key with which a quick and targeted detection of all common clutch sizes is possible and which has a compact structure and to which an adapter for actuating further locking elements can be adapted via at least one adapter element, as well as an adapter for To make available.

The object is achieved with the features of the first and eighth patent claims. Advantageous configurations result from the dependent claims.

The clutch key according to the invention has an essentially C-shaped, flat key area on which several key surfaces are formed, the clutch key having at least one adapter element with which a corresponding adapter for actuating further locking elements can be detachably connected.

The wrench flats are preferably located on the peripheral inner contour of the wrench area. At least one end of the in particular C-shaped key area and/or on the peripheral outer contour, which faces away from the inner contour, there is a handle area which is formed in one piece with the key area.

At one end of the inner contour of the key area there is a stop, whereby a defined key width can be assigned to the stop and one of the key surfaces in such a way that a key width corresponding to "Storz D" is between the stop and the first key surface, and between the stop and the second key surface a wrench size corresponding to "hazardous goods DN32", between the stop and the third wrench flat a wrench size corresponding to "Storz C" and "hazardous goods DN50", between the stop and the fourth wrench flat a wrench size corresponding to "Storz B" and between the stop and the fifth wrench flat a wrench size corresponding to "Storz A" can be detected.

The clutch key, which is designed as an essentially planar structure, has a grip area which is arranged on the end of the key area opposite the stop. However, it can also have a grip area which is arranged on the side of the key area which is remote from the key surfaces.

The handle area has openings for additional operating functions.

Thus, the handle portion has an opening for engagement of a square wrench and openings for engagement of hex wrenches.

In addition, an opening serving to fasten the coupling key is provided in the grip area.

The tapering end of the key area opposite the stop can also be used as a key.

Due to the fact that each key size can be assigned a suitable distance from the stop that delimits the key area on one side to one of the key surfaces, it is ensured that the correct size can be set quickly and without any problems. The stop serves as the first limit for each wrench size, while the second limit is formed by one of the wrench faces of the wrench area depending on the size of the clutch to be detected.

The invention is explained in more detail below using exemplary embodiments and the associated drawings.

Figur 1

Prinzipdarstellung des Schlüsselbereiches mit angedeuteten Varianten der Anordnung des Griffbereiches und des Adapterelementes,

Figur 2

Kupplungsschlüssel mit dem Griffbereich auf der Rückseite des Schlüsselbereiches und am Ende des Griffbereichs ausgebildeten Adapterelement mit viereckigem Querschnitt,

Figur 3

dreidimensionale Darstellung des Adapters aus Richtung der ersten Ausnehmung,

Figur 4

dreidimensionale Darstellung des Adapters aus Richtung der zweiten Ausnehmung, die hier dreieckförmig ist,

Figur 5

die Draufsicht des Adapters aus Richtung der zweiten Ausnehmung,

Figur 6

die Ansicht des Adapters von unten aus Richtung der ersten Ausnehmung,

Figur 7

die Draufsicht des Adapters aus Richtung der zweiten Ausnehmung, die hier viereckförmig ist,

Figur 8

Kupplungsschlüssel und Adapter zusammengesteckt,

Figur 9 bis 11

Varianten der Anordnung von Griffbereich und Adapterelement.

Show it:

figure 1

Schematic representation of the key area with indicated variants of the arrangement of the handle area and the adapter element,

figure 2

Coupling wrench with the grip area on the back of the key area and an adapter element with a square cross-section formed at the end of the grip area,

figure 3

three-dimensional representation of the adapter from the direction of the first recess,

figure 4

three-dimensional representation of the adapter from the direction of the second recess, which is triangular here,

figure 5

the top view of the adapter from the direction of the second recess,

figure 6

the view of the adapter from below in the direction of the first recess,

figure 7

the top view of the adapter from the direction of the second recess, which is square here,

figure 8

Coupler key and adapter plugged together,

Figure 9 to 11

Variants of the arrangement of the handle area and adapter element.

The clutch key K according to the invention has figure 1 a key area 1 bent here essentially in a C-shape, which consists of a plurality of contours on its inner peripheral surface 1a. Each of these contours represents a wrench flat 1.1, 1.2, 1.3, 1.4, 1.5, which can be brought into or out of engagement with the couplings to be opened or closed, for example of fire hoses.

The key area 1 is delimited by a stop 2 at its first end 1b. The stop 2 and one of the wrench flats 1.1, 1.2, 1.3, 1.4 or 1.5, which are arranged in such a way that they can be assigned different wrench sizes, come to rest on the couplings of the fire hoses. Thus between stop 2 and wrench flat 1.1 the wrench size "Storz D", between stop 2 and wrench flat 1.2 "dangerous goods DN32", between stop 2 and wrench flat 1.3 "Storz C" and "dangerous goods DN50", between the Stop 2 and the wrench flat 1.4 "Storz B" and between the stop 2 and the wrench flat 1.5 "Storz A" recorded.

Thus, the stop 2 serves as a point of attack for each wrench size on the to-use coupling of the fire hose. The second point of attack is formed by the matching wrench flat. Since the wrench flats 1.1, 1.2, 1.3, 1.4, 1.5 represent a contour area without cams or similar stops, with each of the wrench flats 1.1, 1.2, 1.3, 1.4, 1.5 forming an individual contour, a quick, basically "blind" approach is possible the clutch possible.

In execution after figure 1 different variants of the arrangement of the handle area 3 shown here in dashed lines are indicated. This can be connected to the first end 1b and/or the second end 1c of the key area 1.

Additionally or alternatively, the grip area 3 can be arranged on the outer peripheral surface 1d opposite the inner peripheral surface 1a.

At the end of the handle area 3 indicated by dashed lines, an adapter element 4 is formed here.

In the planar key area 1 further openings 5.1, 5.2 are provided here. The opening 5.1 is used, for example, to hang up the clutch key and the hexagonal opening 5.2 for engaging a hex key.

In the version of the clutch key after figure 2 is the handle portion 3 on the back of the key portion 1, ie on the outer peripheral surface 1d arranged and at the end of an adapter element 4 is formed in the form of a square. The dimensions of the square are either 1/4 inch, 3/8 inch or 1/2 inch. The square is preferably designed as a 3/8 inch interface. In the adapter element 4, a spring-loaded ball 4.1 is arranged, which is suitable for fixing an attached adapter, not shown here, in its position. The material thickness of the coupling key preferably corresponds to the dimensions of the square, preferably 3/8 inch or 0.95 cm. However, a step between the material thickness of the coupling key and the adapter element 4 would also be possible.

Grip area 3 is also intended for additional operating functions. For this purpose it has openings 5.3, 5.4. So the breakthrough 5.4 is used to hold a square key z. B. can be used as a hand wheel replacement in wall hydrant cabinets. The breakthrough 5.3 is provided for a hex key, z. B. for battery terminals in cars or trucks.

In the embodiment of the coupling key K with the arranged on the back of the key portion 1 handle portion 3, the stop 2 opposite second end 1c of the key portion 1 is formed at an angle a sloping. As a result, this part of the coupling key (the second end 1c) can also be used as a key - for example as a key for a riser or a wall hydrant.

The entire clutch key K including the handle area 3 and the adapter element 4 is preferably made from a flat material.

With this coupling key K, all common coupling sizes can be recorded and additional operating functions can be implemented.

The clutch key K, which is designed as an essentially flat structure, is easy to handle, has a low weight and relatively small dimensions, and can be produced easily and inexpensively.

However, the problem-free and quick detection of the correct key size by the coupling key according to the invention is to be seen as particularly advantageous compared to the known coupling keys. This is achieved due to the above-described contoured design of the wrench flats in conjunction with a stop common to all wrench flats.

figure 3 shows a variant of a new adapter 6 according to the invention from the direction of its underside 6a, and figure 4 from the direction of its top 6b.

A first recess 7, which has an essentially square shape, is introduced from the direction of the underside 6b. In a side wall (not designated) of the first recess 7, a concave recess 7.1 is introduced.

Out of figure 4 it can be seen that from the direction of the upper side 6b of the adapter 6, a second recess 8 in the form of a key contour—here for a triangular key—is introduced. The adapter 6 has a slot 9 from its outer circumference to the key contour/recess 8 . As a result, the key contour is formed in the second recess 8 of the adapter 6, which is open on the peripheral side. For manufacturing reasons, the slot 9 is formed somewhat deeper than the recess 8.

The key contour is essentially triangular here and is used for. B. to operate a triangular key. In this case, only one side 8a and two corners 8.1, 8.2 of the triangle are formed completely in the second recess 8 and the other two sides 8b and 8c only partially and the third corner 8.3 is not.

The missing areas of the side edges 8b, 8c and the third corner 8.3 have been indicated with dashed lines.

The depths of the first recess 7 and the second recess 8 are designed in such a way that they are separate from one another and do not merge into one another. With the adapter 6, a triangular wrench can be safely actuated and the required torque can be transmitted, although the side edges 8b and 8c are not completely formed, since the adapter is open on the peripheral side in the region of the second recess 8.

On the peripheral side, the adapter 6 has a first flattened area 6c on the side of the slot 9 and a parallel second flattened area 6d opposite this.

The flat areas 6c, 6d in connection with the peripherally open contour in the area of the second recess 8 result in an overall flat design of the adapter 7 with a small depth t.

The width b is larger in comparison and the height h is chosen so that the first recess 7 ensures a secure connection with a corresponding adapter element and the second recess ensures a secure connection with a corresponding key (here triangular key).

figure 5 shows the top view of the adapter 6, from which the circumferentially incomplete triangular shape of the second recess 8 and the slot 9 can be seen.

In figure 6 the view of the adapter 6 from below in the direction of the first recess 7 is shown. The circumferential flattenings 6c and 6d can also be seen from these representations.

figure 7 shows the plan view of the adapter 6 from the direction of the second recess 8, which is designed here as a square to accommodate a square.

Here, too, starting from the side/flattening 6c, a slot 9 is introduced, which leads to the recess 8.

The side edges 8a, 8b of the recess 8 are fully formed and the side edges 8c and 8d only partially. The side edges 8c and 8d should still transmit sufficient torque to a corresponding square key. The side edges 8a, 8b, 8c, 8d of the recess 8 are inclined here at an angle of approximately 45° in relation to the flattened areas 6c, 6d.

In figure 8 are a clutch key K according to figure 2 and an adapter 6 according to FIG Figure 3 to 6 shown plugged together. The adapter 6 was placed with the first recess 7 onto the adapter element 4 which adjoins the handle area 3 . The spring-loaded ball 4.1 engages (see figure 2 ) in the concave recess 7.1 (see figure 3 ) in the side wall of the first recess 7 a. As a result, the adapter 6 is fixed axially on the clutch key K. The connection should be able to be released again when an axial force is applied using muscle power.

With the adapter 6 more keys can now be operated, here e.g. B. a triangular key. In this case it is possible to grasp the key area 1 and manipulate it manually to realize the required rotation of the adapter 6

the Figures 9 to 10 show further variants of the arrangement of grip area 3 and adapter element 4 on key area 1 of a clutch key K, indicated by dashed lines. In key area 1, several non-designated openings are provided, which can be used to operate other keys (square, hexagon), as well as a round opening for Hanging the mini clutch key.

Additional openings, not shown, can also be present in the handle area 3 .

According to figure 9 the handle portion 3 is provided at the end 1c. An adapter element 4 is provided on the opposite end 1b and on the outer peripheral surface 1d facing away from the peripheral surface 1a with the key surfaces not designated here. In this case, for example, one adapter element 4 can be designed in the form of a square and the other adapter element 4 can be designed in the form of a hexagon.

figure 10 shows a variant in which the handle area 3 is provided at the end 1c. An adapter element 4 is arranged on the opposite end 1b and on the outer peripheral surface 1d. Here too, for example, one adapter element can be in the form of a square and the other adapter element in the form of a hexagon.

According to figure 11 the handle area 3 is arranged on the outer peripheral surface 1d and an adapter element 4 is formed at each end 1a, 1c.

There is of course also the possibility to provide only one adapter element or, for example, in the variants shown Figures 9 to 11 also to form an adapter element at the end of the handle area 3 .

With the solution according to the invention, a coupling key is created which, due to its small and flat design, can be placed in a trouser pocket, for example, by employees of the fire brigade or special forces and can be used in a variety of ways. Due to the possibility of using an adapter on the adapter element to operate other keys, e.g. B. of three or square keys, the field of application of the "mini" clutch key is expanded.

Reference List

1

key area

1.1

wrench flat

1.2

wrench flat

1.3

wrench flat

1.4

wrench flat

1.5

wrench flat

1a

inner peripheral surface

1b

first end of key range

1c

end of the key area

1d

outer peripheral surface

2

attack

3

grip area

4

adapter element

5

breakthrough

5.1

breakthrough

5.2

breakthrough

5.3

breakthrough

5.4

breakthrough

6

adapter

6a

Bottom adapter

6b

top adapter

6c

flattening

6d

flattening

7

recess

7.1

concave indentation

8th

second recess

8.1

first corner

8.2

second corner

8a

side

8b

side

8c

side

8d

side

9

slot

H

Height

t

depth

K

clutch key

Claims (14)

Coupling key for the fire brigade or special forces, with a flat key area (1) on which one or more key surfaces (1.1, 1.2, 1.3, 1.4, 1.5) are formed, the key area (1) being essentially C-shaped, and the key surfaces are located on a circumferential inner contour of the C-shaped key area (1),
characterized, - that at least one end of the C-shaped key area (1) and/or on a peripheral outer contour of the key area (1) adjoins a gripping area (3). - and the coupling key has at least one adapter element (4) onto which an adapter (6) having a key contour can be detachably plugged, - wherein the adapter element (4) is formed on the handle area (3) and/or on at least one end (1b, 1c) of the C-shaped key area (1) and/or on the peripheral outer contour of the key area (1). Coupling key according to one of the preceding claims, characterized in that the handle area (3) is formed in one piece with the key area (1) and that the adapter element (4) is formed in one piece with the handle area (3) or the key area (1). Coupling wrench according to one of the preceding claims, characterized in that the adapter element (4) has a square or hexagonal cross-section. Coupling key according to one of the preceding claims, characterized in that the key area (1) has key surfaces (1.1, 1.2, 1.3, 1.4, 1.5) and that a stop (2) is formed at a first end (1b) of the key area (1). , which defines a wrench size with one of the wrench flats (1.1, 1.2, 1.3, 1.4, 1.5). Coupling wrench according to one of the preceding claims, characterized in that it is designed as an essentially planar structure. Coupling key according to one of the preceding claims, characterized in that the key area (1) and/or the handle area (3) have openings (5.1, 5.2, 5.3, 5.4) for further operating functions. Adapter with a first recess (7) for the detachable connection to an adapter element, the adapter (6) having a key contour opposite the first recess (7), characterized in that the key contour is located in a second recess (8) of the adapter ( 6) is formed. Adapter according to Claim 8, characterized in that the first recess (7) is of quadrangular or hexagonal design. Adapter according to one of the preceding claims, characterized in that the key contour formed in the second circumferentially open recess (8) is not completely formed on the circumference and does not completely enclose a key or an actuating element that can be brought into engagement with it. Adapter according to one of the preceding claims, characterized in that due to the incomplete key contour of the adapter (6) a sufficiently large torque to actuate the key or the actuating element can be transmitted to the key engaged with it or the actuating element. Adapter according to one of the preceding claims, characterized in that the second recess (8) is designed in cross-section as a polygon which is not completely formed on the peripheral side. Adapter according to one of the preceding claims, characterized in that the cross-section of the second recess (8) is designed as a triangle or square or hexagon which is not completely formed on the peripheral side. Adapter according to one of the preceding claims, characterized in that the second recess (8) is open on the peripheral side in such a way that at least part of a corner area of the key contour is not formed. Adapter according to one of the preceding claims, characterized in that the first recess (7) of the adapter (6) can be releasably connected to an adapter element (4) of a coupling key according to claim 1.

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