Fitting for attaching an operating handle

Abstract

The invention relates to a fitting (1) for attaching an operating handle (2) to a door (D), a window or the like, with a part (3) rotatably mounted therein, which can be penetrated by a square pin (4), wherein the operating handle (2) has at one end (2a) facing the fitting (1) an end face recess (2b), in particular in the form of a blind hole, into which the part (3) engages in the mounted state, and with an elastic positive locking element (5), in particular in the form of an expanding element, which is attached or attachable to the rotatably mounted part (3), wherein the positive locking element (5) arranged on the part (3) can be inserted into and removed from the end face recess (2b) in the relaxed state, and wherein the positive locking element (5) can be tensioned or tightened by means of the square pin (4) or an additional part arranged thereon.is expandable and in this state forms a positive fit with the actuating handle (2), which prevents the actuating handle (2) from being pulled off or removed from the fitting (1).

Description

The present invention relates to a fitting for attaching an operating handle to a door, a window or the like. Fittings for doors, windows, and the like have been around for a long time and are available in various designs. A door fitting, for example, can be attached to a door leaf and have a rotating recess for a square spindle. With most common fitting designs, an operating handle, such as a lever, latch, or knob, can be attached to the square spindle. The operating handle is then secured to the spindle, for example, with a threaded stud, using a screw or clamp connection. When the operating handle is actuated, the square spindle transmits the rotational movement to a lock or lock follower located in the door leaf, and possibly also to the opposite operating handle on the other side of the door. Depending on the lock used, this usually adjusts a latch, allowing the door to be opened. Similar solutions exist for windows and furniture. If the operating handle is attached to a fitting or square spindle using a threaded stud or similar fastener, a recurring problem is that the operating handle can become unintentionally loosened or removable if the fastener loosens or is deliberately removed. This can occur with regular use of the operating handle, for example, due to wear and tear or a gradual loosening of the threaded stud caused by movement, and is undesirable. If a fitting is located on the exterior of a building, the attached operating handle can easily be stolen by loosening the threaded stud. This then necessitates repair of the fitting and / or replacement of the operating handle. One object of the present invention is therefore to provide a fitting in which the aforementioned problems do not exist. At the same time, the operating handle should be easy to mount and dismount on the fitting. This object is achieved with a fitting having the features of claim 1. Further advantages will become apparent from the dependent claims. The fitting according to the invention comprises a rotatably mounted part, which can be penetrated by a square pin, and wherein the actuating handle has an end face recess at one end facing the fitting, into which the part engages in the assembled state. Furthermore, the fitting comprises an elastic positive locking element, which is attached or attachable to the rotatably mounted part, wherein the positive locking element arranged on the part can be inserted into and removed from the end face recess of the actuating handle in the relaxed state, and wherein the positive locking element can be tensioned or expanded by means of the square pin or an additional part arranged on the square pin, in particular in or on one end face thereof, and in this state forms a positive lock with the actuating handle, which advantageously prevents the actuating handle from being pulled off or removed from the fitting. The front-facing recess of the operating handle can, for example, be a blind hole which is provided at an end of the operating handle facing the fitting and is suitable for receiving the rotatably mounted part of the fitting. The elastic form-locking device can, for example, be an expanding element which can be expanded by means of the insertable square pin. In the spread-out state, it forms a positive fit with the operating handle, while in the unspread-out state it does not form a positive fit. Other positive locking devices besides a spreading element are conceivable and possible, for example latches, pins, locking, clamping and plugging devices, provided they are suitable to be adjusted by the square pin in order to form a positive locking connection with the operating handle. The part attached to the square pin can be, for example, a bolt, a screw or similar, which deflects and / or spreads the positive locking element through contact with it. Because the positive locking element can be inserted into and removed from the end-face recess of the operating handle, it can be completely located within the operating handle, depending on the design of both the handle and the positive locking element, when the handle is attached to the fitting. This means the positive locking element is inaccessible from the outside when the handle is attached to the fitting. Accidental or deliberate disassembly of the operating handle is thus advantageously made more difficult or impossible. A further advantage lies in the simple installation, as the operating handle can simply be slid onto the fitting as long as the square spindle has not yet engaged with the positive locking element to form the positive lock. After sliding the operating handle onto the fitting or its rotatably mounted part, the square spindle can be pushed (further) into the fitting from the other side of the door, thus ultimately forming the positive lock. The fitting according to the invention therefore enables particularly simple installation, in which the operating handle snaps into place or is secured by inserting the square spindle. Further complex and potentially cumbersome installation steps, such as screw connections, are no longer absolutely necessary with the fitting according to the invention. Of course, it is still possible, and possibly advisable, to provide a threaded stud for additional fastening of the operating handle to the fitting in order to minimize or avoid any play between the operating handle and the fitting. Because the positive locking element is elastic, it advantageously returns to its original state as soon as the square spindle is removed far enough that it no longer interacts with the positive locking element to form the positive lock. This also makes disassembly of the operating handle particularly easy and requires no additional tools. If the square spindle is pulled out of the fitting from one side of the door, the positive locking element releases the operating handle, as the positive lock is broken. With a suitable design and arrangement of the positive locking element, the operating handle can then simply be pulled off the fitting. Nevertheless, the attachment to the fitting is particularly secure, since the connection can only be released from one side of the door, and wear-related loosening of any fastening screw, as is the case with prior art solutions, does not occur. The positive locking mechanism, for example, need not be limited to a snap-fit, click, or clamping connection, where an additional force-fit connection is also conceivable and possible. Crucially, the positive locking element must prevent the actuating handle from being pulled off or disassembled. Pulling off the actuating handle typically occurs parallel to the axial direction of the square pin. According to the invention, this axial movement is limited or prevented by the tensioned or spread positive locking element. Because the positive locking element is arranged on the rotatably mounted part and is tensioned or spread by the square pin, a key aspect of the invention is that the fastening handle is actually attached to the fitting and not to the square pin. The square pin can be removed from the fitting in the installed state, thus releasing the operating handle. Various embodiments are possible in which either the square pin and / or the rotatably mounted part transmits the rotational movement directly or indirectly to the lock or the lock cylinder. Because the square pin tensions or spreads the positive locking element, the operating handle can be attached to one side of the door from the other. This means that, depending on the design of the operating handle and the fitting, the operating handle can completely enclose the fasteners, preventing it from loosening on one side. This prevents the operating handle from loosening unintentionally and protects against vandalism. The positive locking device can be designed, for example, to have at least one arm with at least one tab. Two opposing arms, each with a tab, are particularly advantageous. The arms can be formed from a sheet of metal, with a tab formed at each end by bending or folding the metal outwards. In this way, the tabs function essentially like barbs molded onto the arms. However, positive locking devices made of plastic or another sufficiently elastic yet robust material are also possible. The two arms can, for example, be positioned radially further inward relative to the axis of rotation in a first position, where the positive locking element is not tensioned or spread, than in a second position, where the positive locking element is tensioned or spread. By inserting the square pin into the fitting or the positive locking element, the two arms can be moved or spread from the first position to the second position. The tabs on the arms can be designed to allow the operating handle to be attached or removed in the first position, and to prevent removal and, if necessary, attachment of the operating handle in the second position. When the square pin is withdrawn from the positive locking element, the arms return to the first position because the positive locking element is elastic. The operating handle can then be removed from the fitting. Of course, it is also possible for the positive locking device to have more than two arms, for example, three, four, or more. However, to make it as easy as possible to insert the square pin into the positive locking device, it can be advantageous if the arms are evenly distributed or equidistant from each other around the circumference or outer contour of the square pin. Since a square pin has an essentially square outer contour with four faces, two opposing arms or four arms, where two arms are positioned opposite each other, are particularly advantageous. The arm(s) of the positive locking element can be arranged on an annular section of the positive locking device. The arms can, for example, be integrally formed on an annular sheet metal section and made of the same material as the annular section. However, it is also conceivable and possible for the arms to be attached to the annular section and / or made of a different material. The crucial point is that the arms can be moved, directly or indirectly, from the first position to the second position by the square pin and return to the first position when the square pin is removed. The arms and / or tabs can be designed to be spring-like, for example, by being made of suitable sheet metal. However, arms made of plastic or another material that is sufficiently elastic yet wear-resistant are also conceivable. Naturally, the ring-shaped section of the positive locking element can also be made of plastic or another suitable material. Sheet metal has the advantage of being relatively simple and therefore inexpensive to manufacture, and it can be designed to optimally meet the requirements for elasticity and wear resistance. To attach the positive locking element to the fitting, the rotatably mounted part of the fitting can have a suitable projecting section on which the positive locking element is arranged. The positive locking element can, for example, be attached to the rotatably mounted part or to the projecting section, for which an embodiment of a positive locking element with an annular section is particularly suitable. The circumference of the outer contour of the projecting section can be somewhat smaller than the outer contour of the remaining rotatably mounted part and correspond to the inner contour of the annular section of the positive locking element. Advantageously, the positive locking element can also be attached to suitable existing fittings, and the fitting can thereby be retrofitted with the fastening mechanism according to the invention. When attached, the arms and / or tabs of the positive locking element can be directed radially inwards, angled, or inclined relative to the axis of rotation, so that the tabs do not project radially beyond the outer contour of the remaining rotatably mounted part in the first position. In this way, the operating handle can be slid over the rotatably mounted part of the fitting in this position and removed again. The square pin can then, for example, be inserted into the annular section or the projecting section of the rotatably mounted part of the fitting and, upon exiting the projecting part, adjust the arms and thus the tabs radially outwards to form a positive locking connection with the operating handle. The rotatably mounted part can have, at least in sections, an outer contour that corresponds to the inner contour of the end-face recess of the actuating handle. For example, a section of the rotatably mounted part can have a substantially cylindrical shape onto which the actuating handle can be attached. The end-face recess of the actuating handle can then also have a substantially cylindrical shape into which the corresponding section of the rotatably mounted part fits precisely. To create a positive fit between the actuating handle and the rotatably mounted part, the outer contour and the corresponding inner contour can have complementary structures. For example, the cross-sections of the outer and inner contours can each be essentially round, but have complementary lugs, grooves, joints, or projections / recesses. The outer and inner contours in question can also have a square, rounded square, triangular, star-shaped, gear-shaped, or rectangular cross-section. In principle, any manufacturable shape is conceivable and possible that creates a positive fit that is rotationally fixed. The different shapes vary, among other things, in the ease of manufacturing and in the force transmission from the actuating handle to the rotatably mounted part.Accordingly, different forms may be advantageous depending on the application and can be selected accordingly. The rotationally fixed positive locking mechanism ensures that the rotational movement of the operating handle is transferred to the rotatably mounted part, so that the lock or lock groove and thus an associated bolt is moved when a user operates the operating handle. The operating handle can have at least one recess in the frontal recess, which corresponds to the tensioned or spread form-locking means and forms the form-lock with it. For example, the end-face recess of the actuating handle can have a first section with an inner contour that corresponds to the outer contour of a portion of the rotatably mounted part. Adjoining this section in the axial direction can be a section whose inner contour widens abruptly in the radial direction, creating a recess in the inner wall of the end-face recess. This recess can be located at the same height as the positive-locking element arranged on the rotatably mounted part when the assembly is complete. The recess can, for example, correspond to exactly one tab. There can also be multiple recesses, each corresponding to exactly one tab. Alternatively, the recess can be circumferential with respect to the inner contour of the end-face recess. When the operating handle is slid over the rotatably mounted part, the tabs of the positive locking element can, for example, engage in the recess(s) and thus, together with the recess(s), form a positive lock in the axial direction relative to the axis of rotation. This can happen automatically due to the elasticity of the positive locking element, so that a de facto click connection exists. The square pin can then be inserted and secures the arms or tabs only in the recess(s). However, it is also possible, and preferred, if the tabs do not engage in the recess automatically, but rather if the square pin moves the tabs from the first position to the second position and holds them there. This has the advantage that the arms or tabs...The tabs of the form-locking element move out of the setback on their own due to their elasticity, so that the operating handle can be removed from the fitting without any further tools. Furthermore, the operating handle may have a hole or opening into which a threaded stud can be screwed. This allows the operating handle to be additionally secured to the square spindle in the conventional manner. Even if the threaded stud is lost or deliberately removed, the operating handle remains attached to the fitting and cannot be removed without damage until the square spindle is pulled out of the fitting or the operating handle from the other side. The threaded stud may also be provided as an additional feature, for example, to compensate for play between the operating handle and the fitting or the positive locking element, and to further lock the operating handle in a specific position. The invention is explained in more detail below using an exemplary embodiment. Of course, the invention is not limited to this embodiment. Figures 1a-1f show a cross-section through an embodiment of a fitting according to the invention in various positions before and during the fastening of an actuating handle; Figure 2 shows isometric views of an embodiment of a fitting according to the invention. Fig. 1a shows a cross-section through an embodiment of a fitting 1 according to the invention, to which no operating handle is yet attached. The fitting 1 is attached to a door leaf D, for example by screw connections (not shown). A lock with a lock follower and a bolt is arranged in the door leaf D; these are not shown for clarity. The fitting 1 has a rotatably mounted part 3, which serves to actuate the lock (not shown). The rotatably mounted part 3 has a substantially cylindrical first section 3z with an outer contour onto which an actuating handle (not shown in this figure) can be attached. A projecting section 3' is integrally formed at the right end of the cylindrical section 3z in the figure; its outer diameter is slightly smaller than that of the first section. A positive locking element 5 is attached to the projecting section 3'. The positive locking element 5 has an annular section 5' whose inner diameter is selected such that it can be securely inserted onto and held in place by the projecting section 3' of the rotatably mounted part 3. Naturally, the projecting chamfer 3' can also have a contour into which the annular section 5' can snap or engage to secure the positive locking element 5. Two opposing arms 5'' are arranged on the annular section 5' of the positive locking element 5, each with a tab 5''' formed at its end. In the first position shown, the arms 5'' are angled radially inwards so that the tabs 5''' do not project radially beyond the outer diameter of the projecting section 3' or the rotatably mounted part 3. From the other side of the door leaf D, a square spindle 4 can be pushed in the direction of the arrow into the fitting 1 or into the rotatably mounted part 3', as indicated by the dashed lines in the figure. The square spindle 4 can be pushed up to the projecting section 3' until it emerges from it, as shown in Fig. 1b. The square pin 4 protruding from the preceding section 3' moves the arms 5'' of the positive locking element 5 radially outwards. In this second position shown, the positive locking element 5 is spread apart in accordance with claim 1. It is therefore a spreading element. The tabs 5''' of the arms 5'' are also radially outwards and, in this position, project beyond the outer circumference of the rotatably mounted part 3. The actuating handle, not shown in this figure, cannot be slid onto the fitting 1 or onto the rotatably mounted part 3 in this second position. Depending on the elasticity of the tabs 5''', however, embodiments are also possible which allow the actuating handle to be attached in this position but prevent it from being removed. To attach the actuating handle 2 to the fitting 1, the square pin 4 must first be removed as shown in Fig. 1c, so that the elastic positive locking element 5 returns to its unspread initial position. The actuating handle 2, shown in cross-section, has a blind-shaped recess 2b at its end 2a facing the fitting 1, the bottom of which is indicated by the dashed line. The end face recess 2b has an inner contour in the first section 2c' which corresponds to the outer contour of section 3z of the rotatably mounted part 3, so that the actuating handle 2 can be slid onto the rotatably mounted part 3 and forms a rotationally fixed positive fit with it. At its right end in the first section 2c', the inner contour of the end face recess 2b has a circumferential recess 2c where the inner diameter of the recess 2b changes abruptly. Furthermore, the actuating handle 2 has an opening in the form of a threaded hole 2d on an outer wall for receiving a threaded stud (not shown). Corresponding to this threaded hole, the movable part 3 also has an opening 2d'' through which a threaded stud can come into contact with the square pin 4. Since the square pin 4 is not located in the positive locking element 5, the tabs 5''' are in the first position and the actuating handle 2 can be slid onto the rotatably mounted part 3. In Fig. 1d, the actuating handle 2 is attached to the rotatably mounted part 3, and the square pin 4 has been pushed back into the fitting 1 or the rotatably mounted part 3. This moves the arms 5'' of the positive locking element 5 into the second position as described above, and the tabs 5''' project radially beyond the outer diameter of the rotatably mounted part 3 with respect to the axis of rotation. As a result, the tabs 5''' extend beyond the recess 2c and abut the end face of the recess 2c. In this position, the operating handle 2 can no longer be removed from the rotatably mounted part 3 and is therefore fixed to the fitting 1. Additionally, a threaded pin 2d' was screwed into the threaded hole 2d until it came to rest against the square pin 4, further securing the mounting handle 2 in this position. Any play between the components involved is thereby compensated for, and the operating handle 2 is thus firmly attached to the fitting 1. Naturally, the square pin 4 can also have a groove or a countersunk position to optimize the engagement of the threaded pin 2d'. If the operating handle 2 is to be disassembled again, the square pin 4 must first be removed, as shown in Fig. 1e. This returns the tabs 5''' to their first position, thus releasing the operating handle 2. Once the threaded pin 2d' has been removed, the operating handle 2 can be pulled off the fitting, as shown in Fig. 1f. Figure 2 shows an embodiment that is essentially the same as Figures 1a-1f in an isometric view. The description and reference numerals apply accordingly.

Claims

Fitting (1) for attaching an operating handle (2) to a door (D), a window or the like, comprising a part (3) rotatably mounted therein, which can be engaged by a square pin (4), wherein the operating handle (2) has at one end (2a) facing the fitting (1) a front-facing recess (2b), in particular in the form of a blind hole, into which the part (3) engages in the mounted state, and comprising an elastic positive locking element (5), in particular in the form of an expanding element, which is attached or attachable to the rotatably mounted part (3), wherein the positive locking element (5) arranged on the part (3) can be inserted into and removed from the front-facing recess (2b) in the relaxed state, and wherein the positive locking element (5) can be clamped or expanded by means of the square pin (4) or an additional part arranged thereon and in this state forms a positive locking connection with the operating handle (2). forms a subtraction orRemoval of the operating handle (2) from the fitting (1) is prevented. Fitting (1) according to claim 1, characterized in that the positive locking means (5) has at least one, in particular two or more, arm(s) (5'') each with at least one tab (5'''). Fitting (1) according to claim 2, characterized in that the arm(s) (5'') is / are arranged on an annular section (5') of the positive locking means (5). Fitting (1) according to claim 2 or 3, characterized in that the arm(s) (5'') and / or the tab(s) (5''') are resilient and in particular are formed from a sheet metal part. Fitting (1) according to one of the preceding claims, characterized in that the positive locking means (5) is arranged on a projecting section (3') of the rotatably mounted part (3), in particular is attached to it. Fitting (1) according to one of the preceding claims, characterized in that the rotatably mounted part (3) has at least sectionally an outer contour which corresponds to the inner contour of the end face recess (2b) of the actuating handle (2) such that the actuating handle (2) is positively locked or rotationally fixed to the part (3) in the fastened state. Fitting (1) according to one of the preceding claims, characterized in that the actuating handle (2) has at least one, in particular circumferential or segmented, recess (2c) in the end face recess (2b), which corresponds to the clamped or spread-out form-locking means (5) and forms the form-lock with it. Fitting (1) according to one of the preceding claims, characterized in that the actuating handle (2) can be attached or fastened to the rotatably mounted part (3) by means of a securing means (2d''), in particular in the form of a threaded pin (2d'). Fitting according to claim 8, characterized in that the part (3) has a bore (2b), optionally with an internal thread, and that the actuating handle (2) also has a through-opening, which may also optionally have an internal thread, wherein the locking means can be screwed either into the internal thread of the part (3) and / or into the internal thread of the actuating handle. Fitting according to one of the preceding claims, characterized in that the square pin (4) can be locked or fastened to the rotatably mounted part (3) by means of a further locking element or by means of the locking means (2d''), in particular by means of a form or friction fit. Fitting (1) according to one of the preceding claims, characterized in that the additional part is attached or arranged in or on the end face of the square pin, wherein the additional part is in particular a screw with a screw head.

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