Pull out the guide

Abstract

The present invention relates to a pull-out guide device for pulling out a pull-out furniture component (5) from a furniture body (4). The device comprises a first guide rail (1) and a second guide rail (2). A stop element (13) of the first guide rail (1) abuts against a pull-out stop portion (12) of the second guide rail (2) to limit the pulling out of the first guide rail (1) from the second guide rail (2). A locking member (14) is rotatably supported on the second guide rail (2) about a rotation axis (15). The locking member (14) can be rotated from a locking position in an opening rotation direction to a release position against the force of a spring member (16). In the locking position, the lifting of the front end portion of the first guide rail (1) is prevented. In the release position, the front end portion of the first guide rail (1) can be lifted and the stop element (13) of the first guide rail (1) can move over the pull-out stop portion (12) of the second guide rail (2). A retaining device is provided, which, in a retaining state, retains the locking member (14) rotated to the release position in the release position.

Description

Technical Field

[0001] and a second guide rail for pulling the first guide rail out of the drawer and out of the drawer, wherein the first guide rail is movable along the drawer side from the second guide rail in a direction of extension. Background Art

[0002] GB 1 335 776 B and GB 801 255 B disclose pull-out guides of the type described above. These pull-out guides comprise a first guide rail in the form of a pull-out rail or drawer rail, a second guide rail in the form of an intermediate rail, and a third guide rail in the form of a body rail. These pull-out guides are designed as differential pull-out guides with a load-transmitting differential wheel rotatably mounted in the center region of the intermediate rail. When the pull-out guide is pulled out of the intermediate rail, the pull-out is limited by the stop element of the pull-out guide abutting against the pull-out stop of the intermediate rail. To completely remove the pull-out guide from the intermediate rail, a locking element (safety lock) rotatably mounted on the intermediate rail is rotated from a locked position to a released position against the force of a spring element. In the locked position, the locking element prevents the front end of the pull-out guide from being raised. In the released position, the front end of the pull-out rail can be raised, allowing the pull-out rail's stop element to be guided past the pull-out stop of the middle rail, allowing the pull-out rail to be removed from the middle rail. Conversely, the pull-out rail can also be inserted into the middle rail, for example, when assembling the pull-out guide device. However, this has the disadvantage that to insert a drawer (on which the left and right pull-out rails are mounted), the locking elements of both middle rails must be simultaneously adjusted to the released position against the force of the spring elements, and the drawer must be inserted with the locking elements in this position, which is difficult for one person to do. The same applies to removing the drawer, along with the pull-out guide device mounted thereon, from the middle rail.

[0003] A similar pull-out guide is also known from GB 202,562A. However, here, the locking element is not biased into the locked position by a spring element, but rather is held in its current rotational position about the axis of rotation by a frictional lock. When closing the drawer, the drawer's side panel moves toward the locking element and adjusts it into the locked position. However, to achieve this, the drawer's side panel and the center rail must be mounted in a precisely correct relative relationship to each other; otherwise, the locking element will not be correctly adjusted into the locked position when the drawer is closed. However, in practice, this precise relationship is not easily maintained when the pull-out guide is mounted on the drawer. For example, in refrigerators with thick sealing lips, this also presents the problem that the pull-out guide (with a self-retracting mechanism) can compress the sealing lip to varying degrees depending on the load, resulting in different final positions.

[0004] A similar situation exists with the extension guide disclosed in EP 1 795 088 A1. Here, the locking element can be rotated and displaced relative to a journal head. If a drawer stop contacts the locking element when the drawer is closed, the stop causes the locking element to move relative to the journal head, causing the locking element's shoulder to engage with the retaining surface of the center rail, thereby preventing the locking element from rotating about the axis of rotation.

[0005] In the pull-out guide known from GB 345,539 B, the locking element can also pivot and move about a journal head. If the pull-out guide is closed in the lock's released position, the locking element strikes a flange of the carcass rail and thereby pivots about the rotation axis into the locked position and moves relative to the rotation axis. As a result, the pin mounted on the intermediate rail is pushed into a recess in the locking element, thereby preventing the locking element from rotating about the rotation axis. If, because the pull-out guide is mounted on a drawer, the drawer's stop hits the furniture carcass before the pull-out rail is fully inserted into the intermediate rail, the locking element is not prevented from rotating about the rotation axis.

[0006] CH 679735 A5 and US Pat. No. 4,065,196 A disclose extension guides in which the extension stop of the central rail is itself pivotable in order to be able to guide a stop element of the extension guide past the extension stop of the central rail. Summary of the Invention

[0007] The object of the present invention is to provide a pull-out guide of the type mentioned at the outset which is more advantageous, has the characteristics of simple operation and reliable function. According to the invention, this object is achieved by a pull-out guide having the features described below.

[0008] 14. The extension guide of claim 13, wherein the first guide rail is configured to extend from a first position to a second position along a pull-out direction of the extension guide, wherein the first guide rail is capable of extending from a first position to a second position along a pull-out direction of the extension guide, wherein the first guide rail is capable of extending from a first position to a second position along a pull-out direction of the extension guide, wherein the first guide rail is capable of extending from a first position to a second position along a pull-out direction of the extension guide, wherein the first guide rail is capable of extending from a first position to a second position along a pull-out direction of the extension guide, wherein the first guide rail is capable of extending from a first position to a second position along a pull-out direction of the extension guide, The pull-out guide device proposed in the present invention is provided with a holding device, which holds the locking element rotated to the release position in the release position in the holding state, wherein when the locking element rotates from the locking position to the release position, the holding device automatically enters the holding state.

[0009] The pull-out guide according to the present invention includes, on the one hand, a spring element that allows the locking element to be rotated from the locked position to the released position against the force of the spring element, and, on the other hand, a retaining device that, when in a retaining state, holds the locking element in the released position after it has been rotated. The retaining device secures the locking element in the released position when the first guide rail is to be completely separated from the second guide rail or when the first guide rail, separated from the second guide rail, is to be inserted into the second guide rail. This makes it easy to remove and insert the first guide rail, for example, when the pull-out guide is mounted on a piece of furniture. When the retaining device is released, the spring element allows the locking element to be reliably adjusted to the locked position.

[0010] Advantageously, when the locking element is rotated from the locking position to the release position, the retaining device automatically takes up the retaining state. Thus, there is no need for the user to perform additional operations on the retaining device in order to activate the retaining state of the retaining device.

[0011] Preferably, the retaining device is configured as a snap-on connection mechanism. The locking element may comprise an elastic tongue having a latching projection, which, in the retaining state of the retaining device, cooperates with a retaining surface provided on the second guide rail. The retaining surface may, for example, be formed by the front end of the upper horizontal flange of the second guide rail. In order to release (release) the retaining state of the retaining device, in this structural design, for example, the user can operate the elastic tongue to disengage the latching projection from the retaining surface. However, it may also be advantageous to provide that the retaining device is released automatically when the first guide rail is inserted into the second guide rail and / or when the pull-out guide is operated.

[0012] In an advantageous embodiment of the present invention, in addition to the first and second guide rails, the pull-out guide device also includes a third guide rail from which the second guide rail can be pulled out and into which the second guide rail can be pushed. Thus, the second guide rail is arranged between the first and third guide rails. The third guide rail can be attached to the furniture carcass, and the first guide rail can be attached to the pull-out furniture component. The third guide rail can also be referred to as the carcass rail, the second guide rail as the intermediate rail, and the first guide rail as the pull-out guide rail (or drawer rail). In particular, in this design, it is provided that when the first guide rail moves relative to the second guide rail, the second guide rail moves synchronously relative to the third guide rail. Such a pull-out guide device is also referred to as a synchronized pull-out mechanism or a differential pull-out mechanism. Advantageously, the second guide rail includes a rotatably mounted, load-transmitting differential wheel in the central region of its longitudinal extension (i.e., its length). The differential wheel has a vertical clearance relative to the second guide rail and rolls between the raceways of the first and third guide rails. This differential pull-out guide is known in principle. Advantageously, all rollers are arranged on the middle rail.

[0013] When “front” and “rear” are mentioned within the context of this text, this refers to the pull-out direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Further advantages and details of the present invention will be described below with reference to the accompanying drawings. In the accompanying drawings:

[0015] Figure 1 An oblique view showing an embodiment of a pull-out guide according to the invention, in the closed position of the pull-out guide;

[0016] Figure 2 Shows the pull-out guide in the open position similar to Figure 1 Oblique view of

[0017] Figure 3 An end view of the extension guide is shown, wherein parts of the furniture carcass and the pull-out furniture part are shown with dashed lines;

[0018] Figure 4 and Figure 5 An oblique view of the third guide rail is shown from different viewing directions;

[0019] Figure 6 and Figure 7 An oblique view of the second guide rail is shown from different viewing directions;

[0020] Figure 8 and Figure 9 An oblique view of the first guide rail is shown from different viewing directions;

[0021] Figure 10 An enlarged partial side view (perpendicular to the pull-out direction) of the front section of the second guide rail is shown, with the locking element in the locked position;

[0022] Figure 11 Shown in the released position of the locking element Figure 10 Similar views;

[0023] Figure 12 、 Figure 13 and Figure 14 An oblique view of the locking element is shown from different viewing directions;

[0024] Figure 15 and Figure 16 Shows the front and rear views of the locking piece;

[0025] Figure 17 The pull-out guide is shown in a side view (perpendicular to the pull-out direction) in the closed position;

[0026] Figure 18 Shown with Figure 17 Similar illustration in the open position of the pull-out guide;

[0027] Figure 19 Shown when taking out the first guide rail Figure 17 and Figure 18 Similar views;

[0028] Figures 20 to 22 A side view of the guide device is shown when the first guide rail is inserted, wherein the third guide rail is cut away in the region of the locking element;

[0029] Figure 23 Shown Figure 20 An enlarged partial view of the locking element area;

[0030] Figure 24 Shown Figure 22 An enlarged partial view of the locking element area;

[0031] Figure 25 A partial illustration of the front end section of the pull-out guide device is shown when the first guide rail is moved in and in the release position of the locking element when the elastic tongue of the locking element strikes the third guide rail;

[0032] Figures 26 to 28 A side view is shown when the first guide rail is inserted into the second guide rail, with the locking element initially in the locked position. DETAILED DESCRIPTION

[0033] The following is with the help of Figures 1 to 28 An embodiment of a pull-out guide device according to the present invention is described. The pull-out guide device is configured as a roller pull-out mechanism. In a roller guide device, rollers are rotatably supported on guide rails, which are used to guide the guide rails in a mutually movable manner. The pull-out guide device comprises a first guide rail 1, a second guide rail 2, and a third guide rail 3. In this embodiment, all rollers are rotatably supported on the second guide rail. The third guide rail 3 is used to be mounted on a furniture body 4 and is only used for Figure 3 A section of the furniture body is shown in dotted lines. The first guide rail 1 is used to be mounted on a pull-out furniture component 5, such as a drawer, of which only one section is Figure 3 The third guide rail 3 can also be called a main body guide rail, the second guide rail 2 can be called an intermediate guide rail, and the first guide rail 1 can be called a pull-out guide rail.

[0034] The guide rails 1-3 are guided synchronously, i.e. when the first guide rail 1 is pulled out from the second guide rail 2 in the pulling direction 6, the second guide rail 2 moves synchronously in the pulling direction 6 relative to the third guide rail 3. Here, relative to the third guide rail 3, the second guide rail 2 always travels half the distance of the first guide rail 1.

[0035] To guide the guide rails 1 to 3 synchronously, a rotatable differential wheel is provided on the second guide rail 2 in the middle of its longitudinal extension. This differential wheel rolls between the downward-facing raceway 1a of the first guide rail 1, located below the horizontal flange 1c, and the upward-facing raceway 3a of the third guide rail 3, located above the lower horizontal flange. This differential wheel transfers a portion of the load on the first guide rail 1 directly to the third guide rail 3. The differential wheel 7 has a vertical clearance. This type of pull-out mechanism is known as a "differential pull-out mechanism."

[0036] In the middle region of the longitudinal extension of the second guide rail 2, above the differential wheel 7, a support wheel 8 is provided, in this embodiment slightly offset forward relative to the differential wheel 7, which can support the rear end of the first guide rail 1 in the upward direction in the extended position of the first guide rail 1.

[0037] As already mentioned, in this embodiment, all rollers are arranged on the center rail, which is preferred in differential pull-out guides. In particular, there is a roller 9 located in the front end region of the second rail 2, which, like the differential wheel 7, interacts with the upward-facing raceway 3a of the third rail 3, and a roller 10 located in the rear region of the second rail 2, which interacts with the downward-facing raceway of the third rail 3, which is arranged on the underside of the upper horizontal flange 3b.

[0038] In the area between the differential wheel 7 and the rear end of the second guide rail 2 , an auxiliary wheel 11 is preferably rotatably mounted, which supports the rear end of the first guide rail 1 downwards in the inserted position of the first guide rail 1 .

[0039] The extension stop 12 of the second guide rail 2 serves to limit the extension of the first guide rail 1 relative to the second guide rail 2 when the first guide rail 1 is in the extended position. The stop element 13 of the first guide rail abuts against the extension stop in the extended position of the first guide rail 1. Furthermore, a locking element 14 is provided on the second guide rail 2. This locking element, which will be described in more detail below, prevents the front end of the first guide rail 1 from being lifted (disregarding a certain amount of play) and the stop element 13 from being guided past the extension stop 12 in the locked position.

[0040] The pulling out of the second guide rail 2 relative to the third guide rail 3 and the pushing of the first guide rail 1 into the second guide rail 2 and the pushing of the second guide rail 2 into the third guide rail 3 are also limited by stops, which can be designed according to the prior art and will not be explained in detail here.

[0041] In the closed position of the pull-out guide, the first guide rail 1 has its pushed-in position, in which it is completely pushed into the second guide rail 2, and the second guide rail 2 has its pushed-in position, in which it is completely pushed into the third guide rail 3. In the open position of the pull-out guide, the first guide rail 1 has its pulled-out position, in which it is completely pulled out from the second guide rail 2, and the second guide rail 2 has its pulled-out position, in which it is completely pulled out from the third guide rail 3.

[0042] The locking element 14 is supported in the region of the front end of the second guide rail 2 in a rotatable manner about a rotation axis 15 perpendicular to the extension direction 6 on a base part of the second guide rail 2 (the base part is in particular designed as a metal profile). Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 10 、 Figure 17 、 Figure 18 and Figure 26In the locked position of the locking member 14 shown in FIG, the locking member 14 prevents the front end of the first guide rail 1 from lifting (ignoring clearance) by cooperating with the abutment surface 14a of the locking member 14 and the support surface 1b of the first guide rail 1. In this embodiment, the support surface 1b of the first guide rail 1 is formed by the upper side of the horizontal flange 1c of the first guide rail 1. Specifically, the upper side of the horizontal flange 1c forms a raceway for cooperating with the support wheel 8, and the lower side of the horizontal flange 1c forms the raceway 1a for cooperating with the differential wheel 7.

[0043] In the side view parallel to the axis of rotation 15 (see in particular Figure 14 and Figure 15 ), the locking element 14 has an outer contour that is greater in the region of the contact surface 14a than in the region adjacent to the contact surface 14a at a distance a from the rotation axis 15. It can also be said that the locking element 14 is eccentrically rotatably supported about the rotation axis 15.

[0044] When the locking element 14 is rotated about the rotation axis 15 in the direction of the opening rotation from the locked position toward the released position, this rotation occurs against the retaining force of the spring element 16. In this embodiment, the spring element 16 is constructed as a single piece with the locking element 14, in particular, from a single piece of material. Here, the spring element 16 comprises a strip-shaped, curved section of the locking element 14, wherein the locking element 14 is made of an elastic material, in particular, an elastic plastic, at least in this section. Therefore, the spring element 16 extends from the main body of the locking element 14 and is freely cantilevered relative to the main body. The end of the spring element 16 facing away from the main body of the locking element 14 is supported on the second guide rail 2, for example, by having a pin-shaped projection of the spring element 16 engage in a hole in the second guide rail 2.

[0045] The locking element 14 and the spring element 16 can also be made of different materials, even if they are designed as one piece. Thus, the spring element 16 can, for example, be made of a plastic material different from the locking element plastic material and / or a spring element made of metal can be injected into the spring element.

[0046] When the locking element 14 is rotated from the locked position to the release position about the rotation axis 15, the snap connection between the locking element 14 and the second guide rail 2 is automatically closed, and the snap connection holds the locking element 14 in the release position against the force of the spring element 16. Figure 11 、 Figure 19 、 Figure 20 、 Figure 21 、 Figure 23 、 Figure 27 and Figure 28. Thus, the snap-fit ​​connection mechanism forms a retaining device, wherein, in the closed state of the snap-fit ​​connection mechanism, the retaining device has a retaining state, and in this retaining state, the locking element 14 rotated to the release position is retained in the release position. Here, when the locking element 14 is rotated from the locked position to the release position, the retaining device automatically assumes the retaining state.

[0047] To form a snap-on connection, in this embodiment, the locking element 14 includes a resilient tongue 17 with a latching projection 18. When the snap-on connection is closed, the latching projection 18 snaps into the second guide rail 2 (directly into the main body of the second guide rail, which is typically a metal profile, or into a portion connected thereto) and interacts with the retaining surface 2a of the second guide rail 2. In this embodiment, the latching projection 18 snaps into the front end of the upper horizontal flange 2b of the second guide rail 2, and the retaining surface 2a is formed in the upper region of the front end of the upper horizontal flange 2b. The upper horizontal flange 2b is a section of the main body of the second guide rail 2 (typically a metal profile). Alternatively, a connecting element may be provided on the main body of the second guide rail 2 (typically a metal profile), with which the latching projection 18 of the tongue 17 of the locking element 16 interacts.

[0048] With the help of Figure 17-Figure 19 To illustrate the complete removal of the first guide rail 1 from the closed position of the pull-out guide. Figure 17 Starting from the closed position shown in FIG. 1 , in which the first and second guide rails 1 , 2 are in their pushed-in position, the first guide rail 1 is pulled out and the second guide rail 2 is simultaneously moved out of the third guide rail 3, so that Figure 18 As shown, the extension of the first guide rail 1 is limited in the extended position of the first and second guide rails 1, 2 by the abutment element 13 of the first guide rail 1 against the extension stop 12 of the second guide rail 2. In order to remove the first guide rail 1, the user rotates the locking element 14 from the locked position to the released position, wherein the snap connection between the locking element 14 and the second guide rail 2 engages. The front end of the first guide rail 1 can now be raised and the stop element 13 can be moved past the extension stop 12 in the extension direction, see Figure 19 The first guide rail 1 can now be completely pulled out of the second guide rail 2 .

[0049] exist Figures 20 to 22 FIG2 shows a situation in which the first guide rail 1 completely removed from the second guide rail 2 is inserted into the second guide rail 2. When the first guide rail 1 is inserted into the second guide rail 2, the second guide rail 2 is preferably in a position to be pushed into the third guide rail 3, see FIG2. Figure 20 .exist Figure 20, the locking element 14 is in the released position before the first guide rail 1 is inserted. The locking element may have been placed in this released position in advance by the user. The upper horizontal flange 3b of the third guide rail 3 has a gap 19 for accommodating the end section of the elastic tongue 17 in the area of ​​its longitudinal extension (in the inserted position of the second guide rail 2, the locking element 14 is in this area), as shown in FIG. Figure 23 In the present embodiment, the gap 19 is configured as a bulge of the upper horizontal flange piece 3b, thereby forming a receiving space below the bulge, in which the end section of the elastic tongue 17 is located.

[0050] The first guide rail 1 can now be pushed into the second guide rail 2. For this purpose, the front end of the first guide rail 1 is raised, see Figure 21 , that is to say in the horizontal posture of the second guide rail 2, the first guide rail 1 is inclined relative to the horizontal line. In this state, the stop element 13 can be guided past the pull-out stop portion 12 against the pull-out direction 6. Figure 21 This shows the state where the rear end of the first guide rail 1 reaches the gap between the differential wheel 7 and the support wheel 8 provided thereon. If the first guide rail 1 is pushed further into the gap between the differential wheel 7 and the support wheel 8 at this position, this will cause the second guide rail 2 to be slightly lifted relative to the third guide rail 3, and at the same time the gap between the differential wheel 7 and the support wheel 8 will be increased (the differential wheel 7 does have a gap in the vertical direction). In this way, the free end of the elastic tongue 17 is pressed onto the upper horizontal flange 3b of the third guide rail 3, and the tongue 17 is bent, thereby allowing the locking protrusion 17 to disengage from the retaining surface 2a of the second guide rail 2. This can be seen in particular from Figure 24 As can be seen in the enlarged detail of the . The snap connection is thus released. Once the front end of the first guide rail 1 is lowered after the locking element 13 has passed the pull-out stop 12, the spring element 16 pivots the locking element 14 about the rotation axis 15 from the released position to the locked position. The first guide rail 1 can then be fully inserted into the second guide rail 2 until it (the first guide rail) assumes the inserted position.

[0051] If the snap connection of the locking element 14 is not opened when the first guide rail 1 is inserted into the second guide rail 2 (because the second guide rail 2 is not lifted enough or the free end of the tongue 17 is not pressed in or is not pressed in strongly enough), then the snap connection will open the next time the extension guide is extended from the closed position. In the closed position of the extension guide, the second guide rail 2 and the third guide rail 3 as well as the locking element 14 in the released position will be in the following position: Figure 23The state shown (in which the first guide rail 1 is also in the inserted position) is shown. If the second guide rail 2 is now moved relative to the third guide rail 3 in the extension direction 6 when the extension guide is opened, the free end of the spring-elastic tongue 17 strikes the upper horizontal flange 3b of the third guide rail 3 in the region of the front end of the recess 19 and is thereby pressed in. This pressing of the spring tongue 17 causes the latching projection 18 to disengage from the retaining surface 2a and opens the snap connection. As a result, the spring element 16 rotates the locking element 14 from the released position into the locked position.

[0052] If the locking element 14 is in the released position when the extension guide is in the open position, i.e., when the first and second guide rails 1, 2 are in the extended position, then when the extension guide is closed, the snap connection is automatically opened and the locking element 14 is thus adjusted from the released position to the locked position. Specifically, the spring tongue 17 strikes the front end of the upper horizontal flange 3b of the third guide rail 3 in the region of its free end, just before reaching the inserted position of the second guide rail 2, see Figure 25 As a result, the spring-elastic tongue 17 is pressed in and the latching projection 18 is disengaged from the retaining surface 2a. The spring element 16 thus rotates the locking element 14 into the locked position.

[0053] In this embodiment, the manual rotation of the locking element 14 from the locking position to the release position can also be omitted in order to insert the first guide rail 1 into the second guide rail 2, as shown in FIG. Figures 26 to 28 As explained. Here, when the first guide rail 1 is inserted, it strikes the side surface 14b of the locking element 14, which in the locked position of the locking element 14 points in the extension direction 6. This side surface 14b is designed with horizontally extending grooves 20 in a concave and convex manner. The rear end of the first guide rail 1 thus hooks onto these structures of the side surface 14b and, when the first guide rail 1 is pushed in, rotates the locking element 14 into the release position, in which the snap connection mechanism is locked, see Figure 27 Therefore, the first guide rail 1 can be inserted into the second guide rail 2 with the raised front end as already described above.

[0054] If an attempt is made to lift the front end of the first guide rail 1 in the locked position of the locking element 14, a force acting at least essentially vertically upwards is applied to the abutment surface 14a of the locking element 14. Due to the orientation of the abutment surface 14a relative to the rotation axis 15, the force acting vertically upwards on the abutment surface 14a causes a torque applied to the locking element 14, which acts in the direction opposite to the opening rotation. It can also be said that in the locked position, the locking element 14 is rotated past the dead center around the rotation axis 15 relative to the support surface 1b of the first guide rail 1 in the direction opposite to the opening rotation. At this time, the stop portion 14c of the locking element presses against the stop surface 2c provided on the second guide rail 2 (at Figure 11 ), whereby the torque is supported (maintained). Thus, in the event of such a force acting on the locking element 14, no spring element 16 is required to hold the locking element 14 in the locked position.

[0055] In order to rotatably connect the locking element 14 to the main part of the second guide rail 2, in this embodiment, the journal head 14d of the locking element 14 is inserted through an opening in the main part of the second guide rail 2 and is heat-forged. Figures 12 to 16 FIG. 1 shows the journal head 14d, which shows the structure of the journal head before the locking member 14 is installed and hot-forged. Figure 7 The hot-stamped end of the journal head 14d can be seen in FIG.

[0056] Alternatively, the rotatable connection between the locking element 14 and the main body of the second guide rail 2 may be achieved in other different ways, such as by riveting or screwing.

[0057] Various modifications to the described embodiments are conceivable and possible without departing from the scope of the invention as defined in the claims.

[0058] For example, the gap 19 may also have an opening in the upper horizontal flange piece 3 b of the third guide rail 3 or be entirely formed by such an opening.

[0059] The snap-in connection between the locking element 14 and the second guide rail 2 can also be designed in various ways. It is conceivable and also feasible in principle to provide an elastic snap-in element on the second guide rail 2, which snaps into the contact surface 14a of the locking element 14 in the released position of the locking element 14.

[0060] Instead of a snap-fit ​​connection, a retaining device of another design can also be provided, which, in a retaining state, retains the locking element rotated into the release position in the release position, and preferably automatically assumes the retaining state when the locking element is rotated from the locked position to the release position. For example, to this end, a spring element that initially resists the rotation of the locking element 14 from the locked position to the release position can be positioned outside the dead center, so that in the release position of the locking element, the spring element exerts a torque on the locking element, which acts in the opening rotational direction and presses a stop of the locking element against a matching stop of the second guide rail.

[0061] In principle, the extension guide can also be designed in another way, in the form of a differential extension mechanism. Thus, it can also be provided that the extension guide comprises only a first guide rail and a second guide rail, wherein the second guide rail can be attached to the furniture carcass and can also be referred to as a carcass rail, while the first guide rail can be attached to the extendable furniture part and can also be referred to as an extension guide.

[0062] Reference Signs List

[0063] 1 First guide rail 2a Holding surface

[0064] 1a Raceway 2b Upper horizontal flange

[0065] 1b Support surface 2c Stop surface

[0066] 1c Horizontal flange 3 Third guide rail

[0067] 2 Second guide rail 3a raceway

[0068] 3b Upper horizontal flange 14 locking piece

[0069] 4 Furniture body 14a backing surface

[0070] 5 Pull-out furniture element 14b Side

[0071] 6 Pull-out direction 14c stopper

[0072] 7 Differential gear 14d journal head

[0073] 8 Support wheel 15 Rotation axis

[0074] 9 Roller 16 Spring element

[0075] 10 Roller 17 Tongue

[0076] 11 Training wheel 18 Locking protrusion

[0077] 12 Pull out the stopper 19 Gap

[0078] 13 stop element 20 groove

Claims

1. A pull-out guide device for pulling out a pull-out furniture component (5) from a furniture body (4), the pull-out guide device comprising a first guide rail (1) and a second guide rail (2); the first guide rail (1) can be pulled out from the second guide rail (2) along a pull-out direction (6) from a pushed-in position to a pulled-out position, in which a stop element (13) of the first guide rail (1) abuts against a pull-out stop portion (12) of the second guide rail (2) to limit the first guide rail (1) from being pulled out further from the second guide rail (2); and a locking piece (14) is supported on the second guide rail (2) and the locking piece surrounds a The rotation axis (15) is rotatably supported on the second guide rail, and the locking piece can be rotated from a locking position to a release position along the opening rotation direction by overcoming the force of the spring element (16). In the locking position, the lifting of the front end of the first guide rail (1) is prevented. In the release position, in order to completely remove the first guide rail (1) from the second guide rail (2) starting from the pulled-out position of the first guide rail (1), the front end of the first guide rail (1) can be lifted, and the stop element (13) of the first guide rail (1) can be moved over the pull-out stop portion (12) of the second guide rail (2); characterized in that A holding device is provided, which holds the locking element (14) rotated to the release position in the release position in a holding state, wherein when the locking element (14) is rotated from the locking position to the release position, the holding device automatically enters the holding state.

2. The pull-out guide device according to claim 1, characterized in that: The holding device is configured as a snap-fit ​​connection mechanism.

3. The pull-out guide device according to claim 2, characterized in that: The locking piece (14) has an elastic tongue (17), and the elastic tongue has a locking protrusion (18). When the retaining device is in a retaining state, the locking protrusion cooperates with a retaining surface (2a) provided on the second guide rail (2) to form the snap connection mechanism.

4. The pull-out guide device according to claim 1, characterized in that: The pull-out guide device has a third guide rail (3), and the second guide rail (2) can be pulled out from the third guide rail (3) along a pull-out direction (6) from a pushed-in position to a pulled-out position. In the pushed-in position of the first and second guide rails (1, 2), the pull-out guide device is in a closed position, and in the pulled-out position of the first and second guide rails (1, 2), the pull-out guide device is in an open position.

5. The pull-out guide device according to claim 4, characterized in that: When the first guide rail (1) moves relative to the second guide rail (2), the second guide rail (2) moves synchronously relative to the third guide rail (3).

6. The pull-out guide device according to claim 5, characterized in that: The second guide rail (2) has a rotatably supported, load-transmitting differential wheel (7) in the middle area of ​​its longitudinal extension, the differential wheel having a gap relative to the second guide rail (2) in the vertical direction and rolling between the raceway (1a) of the first guide rail (1) and the raceway (3a) of the third guide rail (3).

7. The pull-out guide device according to claim 2, characterized in that: The pull-out guide device has a third guide rail (3), and the second guide rail (2) can be pulled out from the third guide rail (3) along a pull-out direction (6) from a pushed-in position to a pulled-out position. In the pushed-in position of the first and second guide rails (1, 2), the pull-out guide device is in a closed position, and in the pulled-out position of the first and second guide rails (1, 2), the pull-out guide device is in an open position.

8. The pull-out guide device according to claim 7, characterized in that: When the first guide rail (1) moves relative to the second guide rail (2), the second guide rail (2) moves synchronously relative to the third guide rail (3).

9. The pull-out guide device according to claim 8, characterized in that: The second guide rail (2) has a rotatably supported, load-transmitting differential wheel (7) in the middle area of ​​its longitudinal extension, the differential wheel having a gap relative to the second guide rail (2) in the vertical direction and rolling between the raceway (1a) of the first guide rail (1) and the raceway (3a) of the third guide rail (3).

10. The pull-out guide device according to any one of claims 7 to 9, characterized in that Starting from the state in which the second guide rail (2) is in the extended position and the locking piece (14) is in the released position, when the second guide rail (2) is pushed into the third guide rail (3), a section of the third guide rail (3) collides with a section of the snap connection mechanism and opens the snap connection mechanism, whereupon the spring element (16) rotates the locking piece (14) into the locked position.

11. The pull-out guide device according to claim 3, characterized in that: The pull-out guide device has a third guide rail (3), and the second guide rail (2) can be pulled out from the third guide rail (3) along a pull-out direction (6) from a pushed-in position to a pulled-out position. In the pushed-in position of the first and second guide rails (1, 2), the pull-out guide device is in a closed position, and in the pulled-out position of the first and second guide rails (1, 2), the pull-out guide device is in an open position.

12. The pull-out guide device according to claim 11, characterized in that: When the first guide rail (1) moves relative to the second guide rail (2), the second guide rail (2) moves synchronously relative to the third guide rail (3).

13. The pull-out guide device according to claim 12, characterized in that: The second guide rail (2) has a rotatably supported, load-transmitting differential wheel (7) in the middle area of ​​its longitudinal extension, the differential wheel having a gap relative to the second guide rail (2) in the vertical direction and rolling between the raceway (1a) of the first guide rail (1) and the raceway (3a) of the third guide rail (3).

14. The pull-out guide device according to claim 13, characterized in that Starting from the state in which the second guide rail (2) is in the extended position and the locking piece (14) is in the released position, when the second guide rail (2) is pushed into the third guide rail (3), a section of the third guide rail (3) collides with a section of the snap connection mechanism and opens the snap connection mechanism, whereupon the spring element (16) rotates the locking piece (14) into the locked position.

15. The pull-out guide device according to claim 14, characterized in that Starting from the state where the second guide rail (2) is in the pulled-out position and the locking piece (14) is in the released position, when the second guide rail (2) is pushed into the third guide rail (3), the front end of the upper horizontal flange piece (3b) of the third guide rail (3) collides with the elastic tongue piece (17) of the locking piece (14) and opens the snap connection mechanism.

16. The pull-out guide device according to claim 15, characterized in that The upper horizontal flange (3b) of the third guide rail (3) has a gap (19) which accommodates at least the end section of the elastic tongue (17) of the locking element (14) in the pushed-in position of the second guide rail (2) and the released position of the locking element (14).

17. The pull-out guide device according to claim 16, characterized in that Starting from the state in which the second guide rail (2) is in the pushed-in position and the locking piece (14) is in the released position, when the second guide rail (2) is moved out of the third guide rail (3), the free end of the elastic tongue (17) collides with the upper horizontal flange (3b) of the third guide rail (3) and opens the snap connection mechanism, whereupon the spring element (16) causes the locking piece (14) to rotate toward the locked position.

18. The pull-out guide device according to any one of claims 13 to 17, characterized in that Starting from the state where the first guide rail (1) has been removed from the second guide rail (2) and the locking piece (14) is in the released position, when the rear end of the first guide rail (1) is pushed between the differential wheel (7) and the support wheel (8) arranged above the differential wheel, the middle guide rail is lifted and the free end of the elastic tongue (17) is pressed against the upper horizontal flange (3b) of the third guide rail (3), so that the snap connection mechanism is opened.

19. The pull-out guide device according to any one of claims 1 to 9, characterized in that The spring element (16) and the locking element (14) are formed in one piece, wherein the end of the spring element (16) facing away from the locking element (14) is supported on the second guide rail (2).

20. The pull-out guide device according to claim 19, characterized in that The spring element (16) extends in a strip-shaped and curved manner.

21. The pull-out guide device according to claim 19, characterized in that The spring element (16) and the locking element (14) are formed from a single piece of material.

22. The pull-out guide device according to any one of claims 1 to 9, characterized in that The locking element (14) has a contact surface (14a), and in the locking position, the locking element cooperates with the support surface (1b) of the first guide rail (1) with the contact surface, and prevents the front end of the first guide rail (1) from lifting by the support surface (1b) contacting the contact surface (14a), wherein the locking element (14) has an outer contour when viewed in a side view in a direction parallel to the rotation axis (15): the outer contour is at a greater distance from the rotation axis (15) in the area of ​​the contact surface (14a) than in the area adjacent to the contact surface (14a).

23. The pull-out guide device according to claim 22, characterized in that In the locked position of the locking element (14), when a force acts vertically upward on the abutment surface (14a), a torque is applied to the locking element (14), which acts in the opposite direction of the opening rotation and is supported by the abutment of the stop portion of the locking element (14) against the abutment surface provided on the second guide rail (2).

24. The pull-out guide device according to any one of claims 1 to 9, characterized in that When the removed first guide rail (1) is inserted into the second guide rail (2) from the rear end of the first guide rail (1), the locking member (14) located in the locked position can be rotated to the released position.

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