Differential pull-out guide for a pull-out furniture part

Abstract

Differential pull-out guide for a pull-out furniture part with a main rail (3), a pull-out rail (1) and an intermediate rail (2), an adjustment element (13) of the intermediate rail (2) being displaceable between a release position, in which the intermediate rail (2) is tiltable relative to the main rail (3) and the intermediate rail (2) stop surface (12) is guided past below the main rail (3) stop element (11), and a locking position. A lateral guide wheel (13f) is rotatably supported on the adjustment element (13) and cooperates with a vertical flange (3d) of the main rail (3). The intermediate rail (2) is shorter than the main rail (3) and the pull-out rail (1). The lateral guide wheel (13f) of the adjustment element (13) cooperates with a vertical flange (1d) of the pull-out rail (1) on the side of the adjustment element (13) opposite the vertical flange (3d) of the main rail (3), or an additional lateral guide wheel (13h) is rotatably supported on the adjustment element (13) and cooperates with a vertical flange (1d) of the pull-out rail (1) on the side of the adjustment element (13) opposite the vertical flange (3d) of the main rail (3).

Description

Technical Field

[0001] This invention relates to a differential pull-out guide device for a pull-out furniture component, comprising a main guide rail for mounting on the furniture body, a pull-out guide rail for mounting on the pull-out furniture component, and an intermediate guide rail disposed between the main guide rail and the pull-out guide rail; wherein the pull-out guide rail and the intermediate guide rail can be pulled out in a pull-out direction from a closed position of the differential pull-out guide device until an open position of the differential pull-out guide device; and, in the open position of the differential pull-out guide device, the pull-out of the intermediate guide rail is restricted from the main guide rail by a stop element of the main guide rail, the stop surface of the intermediate guide rail abutting against the stop element; wherein, in the rear end region of the intermediate guide rail, an adjustment member is supported on the intermediate guide rail, the adjustment member being able to... The adjustment mechanism allows for shifting between a release position and a locking position. In the release position, the intermediate guide rail can tilt relative to the main guide rail about a horizontal axis perpendicular to the pull-out direction of the intermediate guide rail from a normal position to a tilting position. In the tilting position, the rear end of the intermediate guide rail is lowered relative to the normal position, and the stop surface of the intermediate guide rail can be guided past the stop element of the main guide rail below it to remove the intermediate guide rail from the main guide rail. In the locking position, the intermediate guide rail is prevented from tilting from the normal position to the tilting position. A lateral guide wheel is rotatably supported on the base of the adjustment member, and this lateral guide wheel engages with the vertical flange of the main guide rail. Background Technology

[0002] A differential pull-out guide of the type described at the beginning is known from EP 1 795 088 B1. In this differential pull-out guide, when the pull-out guide is pulled out, the intermediate guide moves synchronously with it, and during this process, the intermediate guide always travels half the stroke of the pull-out guide. For this purpose, the intermediate guide particularly has a load-transmitting differential wheel that rolls between the raceways of the pull-out guide and the main guide. All rollers of the pull-out guide are typically rotatably supported on the intermediate guide.

[0003] In the open position of the pull-out guide device, its pull-out is restricted by a stop; in the closed position, its closing movement is also restricted by a stop. To restrict the pull-out of the intermediate guide rail from the main guide rail, the main guide rail has a stop element against which a stop surface of the intermediate guide rail abuts in the pulled-out state. To allow the intermediate guide rail to be removed from the main guide rail or to lock such removal, an adjusting member located in the rear end region of the intermediate guide rail is used. This adjusting member is adjustable between a release position and a locking position. In the release position of the adjusting member, the intermediate guide rail can be tilted relative to the main guide rail about a horizontal axis perpendicular to the pull-out direction of the intermediate guide rail from a normal position to a tilted position. In the tilted position, the rear end of the intermediate guide rail is lowered relative to the normal position. Thus, the stop surface of the intermediate guide rail can pass below and beside the stop element of the main guide rail, and the intermediate guide rail can be completely pulled out of the main guide rail. In the locked position of the adjusting component, the intermediate guide rail is prevented from tilting from the normal position to the tilt position, thus preventing it from being removed from the main guide rail. A roller on the adjusting component is rotatably supported about a horizontal axis perpendicular to the pull-out direction, and this roller engages with the upward-facing raceway of the main guide rail. If an attempt is made to tilt the intermediate guide rail from the normal position to the tilt position while the adjusting component is in the locked position, the roller of the adjusting component presses against the raceway of the main guide rail, thereby preventing tilting. Conversely, in the released position, the adjusting component can pivot about a horizontal axis perpendicular to the pull-out direction. Furthermore, a lateral guide wheel is rotatably supported on the adjusting component, and this lateral guide wheel engages with the vertical flange of the main guide rail. This improves the lateral stability of the pull-out guide device against loads on the intermediate guide rail facing away from the vertical flange of the main guide rail, especially in the open state of the pull-out guide device.

[0004] Furthermore, some pull-out guides with self-pull-in mechanisms are known, wherein the pull-out guide is automatically pulled in during the last segment of the push-in stroke. Advantageously, such a self-pull-in mechanism is integrated into the pull-out guide. For example, a pull-out guide with an integrated self-pull-in mechanism is known from WO2008 / 119091 A1. To provide space for integrating the self-pull-in mechanism, the intermediate guide has a cutout in a portion of its height in the region of its rear end. Above this cutout, on the rear end of the intermediate guide, there is a roller, as is customary, which engages with the downward-facing raceway of the main guide. In front of this cutout is an auxiliary wheel, which engages with the same raceway as the differential wheel, and in the push-in state of the pull-out guide, this auxiliary wheel prevents the rear ends of the intermediate guide and the pull-out guide from tilting downwards (tipping over), which is also common for differential pull-out mechanisms. Because of the cutout in the intermediate guide rail located behind the auxiliary wheel, it is impossible to install an adjustment component at this location. This adjustment component can be adjusted between a released position and a locked position. In the released position, the intermediate guide rail can be tilted from a normal position to a tilting position to remove it from the main guide rail, and in the locked position, such tilting is prevented. Therefore, the stop element provided on the intermediate guide rail itself can be adjusted between an actuated position and a standby position. In the actuated position, this stop element cooperates with the stop element of the main guide rail to restrict the intermediate guide rail from being pulled out of the main guide rail. In the standby position, this stop element disengages from the stop element of the main guide rail to allow the intermediate guide rail to be fully pulled out of the main guide rail. However, the design of the adjustable stop element is disadvantageous in terms of operation, structure, and durability. Furthermore, since the cut is located only at the lower part of the intermediate guide rail at its rear end, the possible structural height of the self-pull-in mechanism is correspondingly limited, thus imposing many limitations on the design of the self-pull-in mechanism. However, if the intermediate guide rail is shortened as a whole, the lateral stability of the pull-out guide device will be reduced. Summary of the Invention

[0005] The object of this invention is to provide a differential pull-out guide device of the type described at the beginning, which is more advantageous in having as much installation space as possible in the region of the rear end of the main guide rail for equipping the pull-out guide device with a self-pull-in mechanism. According to the invention, this object is achieved by a differential pull-out guide device having the features described in claim 1.

[0006] In the differential pull-out guide device according to the invention, the intermediate guide rail is configured to be shorter than both the main guide rail and the pull-out guide rail, and in the pushed-in state of the differential pull-out guide device, the rear end of the intermediate guide rail is offset forward relative to both the rear end of the main guide rail and the rear end of the pull-out guide rail (i.e., its position is offset forward). The lateral guide wheel of the adjusting member located in the region of the rear end of the intermediate guide rail not only engages with the vertical flange of the main guide rail, but also engages with the vertical flange of the pull-out guide rail on the opposite side of the adjusting member facing the vertical flange of the main guide rail. Alternatively, an additional lateral guide wheel is rotatably supported on the base of the adjusting member, and this additional lateral guide wheel engages with the vertical flange of the pull-out guide rail on the opposite side of the adjusting member facing the vertical flange of the main guide rail.

[0007] According to the construction design of the invention, an installation space is provided in the region of the rear end of the main guide rail, which extends substantially over the entire height of the main guide rail. By designing the adjusting member such that the lateral guide wheels also interact with the vertical flange of the pull-out guide rail, or by providing additional lateral guide wheels on the base of the adjusting member that cooperate with the vertical flange of the pull-out guide rail, the differential pull-out guide device according to the invention possesses advantageous lateral stability in the closed position and in the first section of the pull-out, such that the pull-out furniture component guided by the differential pull-out guide device is stable against forces acting in the sense of rotation about the vertical axis. Furthermore, the operating characteristics of the pull-out guide device are improved due to reduced friction.

[0008] Preferably, the main guide rail and the pull-out guide rail have the same length and are flush with each other at their front and rear ends in the closed position of the differential pull-out guide device.

[0009] In an advantageous embodiment of the invention, a roller is rotatably supported on the base of the adjusting member. This roller—at least from the closed state of the differential pull-out guide—rolls between the upward-facing raceway of the main guide rail and the downward-facing raceway of the pull-out guide rail in the first section of the differential pull-out guide's pull-out, and in this section of the differential pull-out guide's pull-out, the load can be transferred from the pull-out guide rail to the main guide rail. Therefore, another auxiliary roller disposed between the differential roller and the adjusting member, which rolls between the upward-facing raceway of the main guide rail and the downward-facing raceway of the pull-out guide rail in the first section of the differential pull-out guide's pull-out, can also be omitted. It is precisely for pull-out guides with short nominal lengths that, with the intermediate guide rail shortened, installing such an additional auxiliary roller is almost impossible or simply impossible due to space constraints. The rollers of the adjusting component may also cooperate only with the upward-facing raceway of the main guide rail, and an additional roller may be rotatably supported on the base of the adjusting component. This additional roller cooperates with the downward-facing raceway of the pull-out guide rail at least in the first section where the differential pull-out guide device pulls out from the closed position. Here, the load can be transferred from the pull-out guide rail to the main guide rail through the additional roller, the base of the adjusting component, and the roller.

[0010] Advantageously, the adjusting member, in the release position, is pivotable relative to the intermediate guide rail about a horizontal pivot axis perpendicular to the pull-out direction to lower the rear end of the intermediate guide rail, and in the locked position, pivoting about this pivot axis is locked, wherein the pivot axis of the adjusting member is arranged further forward than the lateral guide wheel of the adjusting member (13). To transfer the adjustment of the adjusting member between the release and locked positions, it is preferably configured that the pivot axis of the adjusting member is movable relative to the intermediate guide rail. Here, in the locked position, a retaining surface of the intermediate guide rail prevents the adjusting member from pivoting about the pivot axis to lower the rear end of the intermediate guide rail, while in the release position, the adjusting member disengages from the retaining surface.

[0011] In an advantageous embodiment of the invention, the adjusting member is positioned such that when the pull-out guide is moved from the open position to the closed position, the adjusting member abuts against a contact surface of the main guide rail, thereby automatically moving the adjusting member into the locked position.

[0012] When "before" and "after" are mentioned within the scope of this article, they are relative to the direction of pulling out. Attached Figure Description

[0013] Other advantages and details of the invention are now illustrated with reference to the accompanying drawings. The drawings show:

[0014] Figure 1 A perspective view of one embodiment of the differential pull-out guide device according to the present invention is shown, with the pull-out guide device in the closed position;

[0015] Figure 2 The pull-out guide is shown in the open position;

[0016] Figure 3 An end view of the pull-out guide device is shown;

[0017] Figure 4 and Figure 5 The main guide rail is shown in oblique views from different viewing directions;

[0018] Figure 6 and Figure 7 The oblique views of the middle guide rail are shown from different viewing directions;

[0019] Figure 8 A side view of the intermediate guide rail is shown, with the adjusting component in the locked position;

[0020] Figure 9 A side view of the rear section of the intermediate guide rail is shown, with the adjusting component not yet pivoted in its released position;

[0021] Figure 10 It shows the relationship with Figure 9 In a similar illustration, the adjusting component has been pivoted and is in its released position;

[0022] Figure 11 and Figure 12 The oblique views of the pulled-out guide rail are shown from different viewing directions;

[0023] Figure 13 and Figure 14 The oblique views of the adjustment components are shown from different viewing directions;

[0024] Figure 15 and Figure 16 The side and top views of the adjustment component are shown;

[0025] Figure 17 Showing something similar to Figure 16 A top view, but without the rollers for adjustment;

[0026] Figure 18 A side view of the pull-out guide device is shown, with the pull-out guide device in the closed position;

[0027] Figure 19 It shows along Figure 18 The cross section of line AA;

[0028] Figure 20 It shows along Figure 18The cross-section of line BB;

[0029] Figure 21 The main guide rail and intermediate guide rail of the pull-out guide device are shown. At this time, the intermediate guide rail is inserted into the main guide rail and tilts to the tilt position. These guide rails are cut open in the area of ​​the adjustment component.

[0030] Figure 22 The intermediate guide rail is shown being further inserted into the main guide rail, with the adjusting component still in the released position and just abutting the contact surface of the main guide rail;

[0031] Figure 23 The intermediate guide rail is shown moving into the push-in position, and the adjusting component is transferred and adjusted to the locking position;

[0032] Figure 24 The intermediate guide rail is shown moving toward the pull-out position, the adjusting component is in the locked position and the stop surface of the intermediate guide rail is abutting against the stop element of the main guide rail, and these guide rails are cut open in the area of ​​the adjusting component.

[0033] Figures 25 to 28 Showing something similar to Figures 13 to 16 A view for a second embodiment of the present invention, having a modified adjustment component;

[0034] Figure 29 It shows along Figure 27 The cross-section of line CC;

[0035] Figure 30 A similar illustration to the second embodiment of the present invention is shown. Figure 20 The cross-section;

[0036] Figure 31 It shows along Figure 30 The cross section of line DD. Detailed Implementation

[0037] The following uses Figures 1 to 24 The first embodiment of the differential pull-out guide device according to the present invention is described. This differential pull-out guide device is constructed as a roller-type pull-out mechanism. In the roller-type pull-out mechanism, some rollers are rotatably supported on guide rails, which are used to achieve mutual movable guidance of the guide rails. The differential pull-out guide device has a main guide rail 3, a pull-out guide rail 1, and an intermediate guide rail 2 disposed between the main guide rail 3 and the pull-out guide rail 1. In this embodiment, all rollers are rotatably supported on the intermediate guide rail 2.

[0038] The main guide rail 3 is used for mounting on the furniture body 4, only when Figure 3A section of the furniture body is shown in dashed lines. Pull-out rails 1 are used for mounting on pull-out furniture components 5, such as drawers, where only one section of the component is... Figure 3 It is shown in dashed lines.

[0039] In this embodiment, the pull-out furniture component 5 is mounted on the lower horizontal flange 1c of the pull-out guide rail 1, which is connected to the lower end of the vertical flange 1d of the pull-out guide rail 1. Alternatively, the lower horizontal flange 1c can be omitted, and the pull-out furniture component 5 can be mounted on the vertical flange 1d. The horizontal flange 1b of the pull-out guide rail 1 is connected to the upper end of the vertical flange 1d. If the lower horizontal flange 1c is present, it and the horizontal flange 1b are located on opposite sides of the vertical flange 1d.

[0040] The main guide rail 3 has a vertical flange 3d. At the upper and lower ends, the upper horizontal flange 3c and the lower horizontal flange 3b are connected to the vertical flange 3d, so that the main guide rail has a C-shaped cross-section.

[0041] The intermediate guide rail 2 has a vertical flange 2a, on which the rollers of the differential pull-out guide device are rotatably supported. In this embodiment, the intermediate guide rail additionally has a horizontal flange 2c, which is connected to the lower end of the vertical flange 2a on one side and to the lower end of the vertical section 2b of the intermediate guide rail 2 on the opposite side. The height of the vertical section is less than half the height of the vertical flange 2a.

[0042] Guide rails 1-3 are guided synchronously, meaning that when pull-out guide rail 1 is pulled out from intermediate guide rail 2 along pull-out direction 6, intermediate guide rail 2 moves synchronously with respect to main guide rail 3 along pull-out direction 6. Here, relative to main guide rail 3, intermediate guide rail 2 always travels half the stroke of pull-out guide rail 1.

[0043] When the differential pull-out guide device is fully pushed together (closed), it is in the closed position. In this closed position, the intermediate guide rail 2 has a push-in position, in which the intermediate guide rail is fully pushed into the main guide rail 3, and the pull-out guide rail 1 also has a push-in position, in which the pull-out guide rail is fully pushed into the intermediate guide rail 2. When the pull-out guide device is fully pulled out (unfolded), it is in the open position. In this open position, the intermediate guide rail 2 has a pull-out position, in which the intermediate guide rail is fully pulled out from the main guide rail, and the pull-out guide rail 1 also has a pull-out position, in which the pull-out guide rail is fully pulled out from the intermediate guide rail 2.

[0044] To synchronously guide guides 1-3, a rotatable differential wheel 7 is provided on the intermediate guide rail. This differential wheel rolls between a downward-facing raceway 1a on the pull-out guide rail 1, located below the horizontal flange 1b of the pull-out guide rail, and an upward-facing raceway 3a on the main guide rail 3, located above the lower horizontal flange 3b of the main guide rail 3. In doing so, a portion of the load on the pull-out guide rail 1 is directly transferred to the main guide rail 3. The differential wheel 7 has a clearance in the vertical direction. In the closed position of the pull-out guide device, the differential wheel is located within the longitudinal center region of the pull-out guide device.

[0045] The intermediate guide rail 2, in the area above the differential wheel 7—slightly forward-biased relative to the differential wheel 7 in this embodiment—has a support wheel 8 rotatably supported on the vertical flange 2a of the intermediate guide rail 2. In the pulled-out position of the pull-out guide rail 1, the support wheel can support the rear end of the pull-out guide rail 1 to prevent it from deflecting upward.

[0046] In this embodiment, as already mentioned, all rollers are mounted on the intermediate guide rail 2, which is preferred in a differential pull-out guide device. Specifically, a roller 9 is located in the front end region of the intermediate guide rail 2, which engages with the downward-facing raceway 1a of the first guide rail 1 and with the upward-facing raceway 3a of the third guide rail 3 in the pushed-in position of the second guide rail 2; and a roller 10 is located in the rear region of the intermediate guide rail 2, which engages with the downward-facing raceway of the main guide rail 3 located below the upper horizontal flange 3c of the main guide rail 3.

[0047] Roller 10 is rotatably supported on the vertical flange 2a of the intermediate guide rail 2. Differential wheel 7 and roller 9 are both rotatably supported between a lower section of the vertical flange 2a and a vertical section 2b of the intermediate guide rail 2 opposite to the lower section. The lower end of the vertical flange 2a and the vertical section 2b are connected to the opposite edge of the lower horizontal flange 2c of the intermediate guide rail 2. The lower section of the vertical flange 2a, the lower horizontal flange 2c, and the vertical section 2b together form a U-shaped section of the intermediate guide rail 2 as viewed in the end view or in the cross-section of the intermediate guide rail.

[0048] In the extended position of the intermediate guide rail 2, a stop element 11 of the main guide rail is used to restrict the intermediate guide rail 2 from being pulled out of the main guide rail 1. A stop surface 12 of the intermediate guide rail 2 cooperates with this stop element. The stop element 11 of the main guide rail 3 is constructed from a tongue that is stamped out from the upper horizontal flange 3c and bent downwards. The stop surface 12 of the intermediate guide rail 2 is formed by the end face of a section of the vertical flange 2a of the intermediate guide rail 2 that extends upwards in the rear end region of the intermediate guide rail 2. In the extended position of the intermediate guide rail 2, the stop surface 12 abuts against the stop element 11. Figure 24 As can be seen in the text.

[0049] Furthermore, an adjustment component 13 is provided on the intermediate guide rail 2, which will be described in more detail below, and this adjustment component prevents the intermediate guide rail 2 from tilting from a normal position to a tilting position while its rear end is lowered in the locked position (see [link]). Figure 21 The stop surface 12 can be guided under the stop element 11 when the device is tilted.

[0050] The push-in of the intermediate guide rail 2 into the pull-out guide rail 1 is restricted by the abutting surface 3e of the main guide rail 3, and the adjusting component 13 abuts against the abutting surface in the push-in position of the intermediate guide rail 2, as will be explained in more detail below.

[0051] The pulling out of the pull-out guide rail 1 from the intermediate guide rail 2 and the pushing of the pull-out guide rail 1 into the intermediate guide rail 2 are also restricted by a stop, which is not the subject of this application and will not be further explained herein. Such a stop is also disclosed, for example, in the prior art described at the beginning, and can also be constructed accordingly. In this embodiment, a locking fastener (Sicherungsteil, safety lock) 17 is rotatably supported around a horizontal axis at the front end of the intermediate guide rail 2, which, in the locked position shown in the figure, locks the pull-out guide rail 1 from disengaging from the intermediate guide rail 2.

[0052] In the rear section of the intermediate guide rail 2, in the lower region of the intermediate guide rail, the adjusting component 13 is configured to be in a locked position (see [reference]). Figure 1-3 (6-8, 23 and 24) and a release position (see Figure 9 , 10 The adjustment member 13 is supported by a transfer adjustment method between (21 and 22). In the released position, the adjustment member 13 can pivot about a horizontal pivot axis 14 perpendicular to the pull-out direction 6. In the locked position, the pivoting of the adjustment member 13 about the pivot axis 14 is locked. In this embodiment, the pivot axis 14 is formed by a journal head 13a of the adjustment member 13, which is disposed on the outside of the two forward-protruding arms 13b of the base 13e of the adjustment member 13. The journal head 13a is engaged with an elongated hole 15 in the intermediate guide rail 2. The elongated hole 15 is disposed in opposite vertical sections of the intermediate guide rail 2. One of the vertical sections (where one of the elongated holes 15 is disposed) is formed by the lower section of the vertical flange 2a of the intermediate guide rail 2. The opposite elongated hole 15 is disposed in the vertical section 2b of the intermediate guide rail.

[0053] The elongated bore 15 extends at least generally in a horizontal direction parallel to the pull-out direction (“generally” in this context means a deviation of less than + / - 10°). The journal head 13a is movable in the elongated bore 15, and therefore the pivot axis 14 is also movable. If the journal head 13a is located at the front end of the elongated bore 15, then the adjusting member 13 is in the locked position. If the journal head is located at the rear end of the elongated bore 15, then the adjusting member 13 is in the released position. To achieve locking the journal head in the locked position and locking it in the released position, the elongated bore 15 preferably has a constriction in the intermediate region.

[0054] In order to place the journal head 13a into the elongated hole 15 when assembling the adjusting component 13, the arms 13b can be bent toward each other accordingly. In order to hold the journal head 13a more reliably in the elongated hole 15, each arm 13b can be connected at its front end by a spring element that resists its compression and closes.

[0055] If the rear end of the intermediate guide rail 2 is pressed downward, the adjusting member 13, located in the locked position, is supported at the abutment portion 13c on the upward-facing raceway 3a of the lower horizontal flange 3b of the main guide rail 3. In this embodiment, the abutment portion 13c is preferably formed by the corresponding lowest point of the roller 13d rotatably supported on the base 13e of the adjusting member 13.

[0056] Roller 13d is disposed in the intermediate space between arms 13b. The lower horizontal flange 2c of the intermediate guide rail 2 has an opening in the area of ​​roller 13d.

[0057] For cases where the differential pull-out guide device is long, the illustrated embodiment can be modified as follows: An additional auxiliary wheel is rotatably supported on the intermediate guide rail 2, in the area between the differential wheel and the adjusting member 13. This auxiliary wheel engages with the same raceway as the differential wheel 7. Such an auxiliary wheel is known in conventional differential pull-out guide devices. In this case, the roller 13d rotatably supported on the adjusting member can also be omitted. Thus, instead of the contact portion 13d formed by the lowest point of the roller, the lower end of the contact section 13i of the base 13e forms this contact portion. Therefore, the base 13e shown in this embodiment can be implemented not only with the roller 13d as shown, but also in applications without the roller 13d.

[0058] In the locked position of the adjusting member 13, the adjusting member is blocked by the retaining surface 2d of the intermediate guide rail 2 to prevent the abutment portion 13c from moving upward by pivoting around the pivot axis 14. In this embodiment, the retaining surface 2d is formed by a rearwardly projecting extension of the vertical section 2b of the intermediate guide rail 2, located above the base 13e of the adjusting member 13.

[0059] For example, in order to prevent the pivotability of the adjusting component 13, the abutment section 13i may also have a forward-protruding protrusion that interacts with a protrusion of the intermediate guide rail in the region next to the roller 13d that protrudes from the lower end of the vertical section 2b toward the roller 13d (this protrusion forms the retaining surface).

[0060] If the adjusting member is moved from the locked position to the released position by moving the journal head 13a rearward in the elongated hole 15, the base 13e disengages from the retaining surface 2d (i.e., is positioned behind it). This releases the pivoting of the adjusting member about the pivot axis 14, in which case the abutment portion 13c rises. However, the intermediate guide rail 2 can then be tilted from its normal position (which it occupies in the locked position of the adjusting member 13) to a tilted position, in which the rear end of the intermediate guide rail 2 is lowered relative to its normal position.

[0061] exist Figure 23 The image shows the normal position of the intermediate guide rail 2 when the adjusting component 13 is in the locked position. Figure 22 In the middle, the adjusting component is moved and adjusted to the release position, but the intermediate guide rail remains in its normal position. Figure 21 In the middle, the middle guide rail tilted (= pivoted) towards the tilting position.

[0062] The tilting (pivoting) of the intermediate guide rail 2 from the normal position to the tilting position occurs around the rotation axis of the differential wheel 7. Because the pivot axis 14 of the adjusting component 13 is further forward than the contact portion 13c of the adjusting component 13 on the raceway 3a, the adjusting component pivots in the opposite direction when the intermediate guide rail 2 tilts from the normal position to the tilting position.

[0063] During the pivoting of the adjusting member 13, the tongue-shaped spring element 13j of the base 13e abuts against the section of the lower horizontal flange 2c of the intermediate guide rail 2 before the cut (i.e., the cut for the roller 13d) and is elastically deflected / offset. Therefore, the spring element 13j generates a restoring force acting on the adjusting member 13 to return it to a position that allows it to be adjusted towards the locking position. Alternatively, at least one spring element can be constructed in other ways to reset the pivoted adjusting member.

[0064] When the intermediate guide rail 2 is pushed into the main guide rail 3 with the adjusting component 13 in the released position, the base 13e of the adjusting component 13 abuts against the contact surface 3e of the main guide rail 3 just before reaching the pushed-in position of the intermediate guide rail 2. See Figure 22 If the intermediate guide rail 2 moves further into the pushed-in position, the adjusting component 13 is pushed towards the locking position via the abutment surface 3e, see [reference]. Figure 23 In this embodiment, the contact surface 3e is formed by a lug that is punched out from the vertical flange 3d and bent.

[0065] In the first section where the differential pull-out guide is pulled out from its closed position, the roller 13d of the adjusting member 13 rolls between the upward-facing raceway 3a of the main guide rail and the downward-facing raceway 1a of the pull-out guide rail 1. Therefore, when a corresponding section of the pull-out guide rail 1 located behind the differential wheel 7 is subjected to a sufficiently strong load, the load can be directly transferred from the pull-out guide rail 1 to the main guide rail 3 via the roller 13e. Here, the roller 13d also functions as the auxiliary wheel typically located between the differential wheel and the rear end of the main guide rail in a conventional differential pull-out guide, which is omitted here.

[0066] The intermediate guide rail 2 is designed to be shorter than both the main guide rail 3 and the pull-out guide rail 1. Furthermore, with the differential pull-out guide device closed, the rear end of the intermediate guide rail is offset forward relative to both the rear end of the main guide rail 3 and the rear end of the pull-out guide rail 1. This is evident from… Figure 18 This can be seen very clearly in the text.

[0067] Thus, a structural space is formed in the rear end region of the main guide rail, within which a self-pull-in mechanism can be installed. This self-pull-in mechanism 16, integrated into the differential pull-out guide device, is only... Figure 18 The middle part is very schematically represented by dashed lines.

[0068] Self-pull-in mechanisms for pull-out guides, i.e., self-pull-in mechanisms integrated into pull-out guides, are known and common. Such self-pull-in mechanisms typically have a spring-loaded tilting slider. When the pull-out guide is pulled out from its closed position, the tilting slider overcomes the spring force and is transferred from a basic position (the tilting slider occupies this basic position in the closed position of the pull-out guide) to a waiting position by a drive member mounted on the pull-out guide. In this waiting position, the drive member of the pull-out guide is decoupled from the tilting slider by its tilting, and the tilting slider is held in the waiting position by abutting against the holding surface of the self-pull-in mechanism. If the pull-out guide is pushed in again, the drive member of the pull-out guide is coupled to the tilting slider and tilts it, thereby releasing the tilting slider from the holding surface. As a result, the spring-loaded tilting slider pulls the pull-out guide towards the pushed-in position. This process can be buffered by a damper.

[0069] In this embodiment, it is preferred that the pull-out guide rail 1 and the main body guide rail 3 have the same length, and that the pull-out guide rail and the main body guide rail are flush with each other at their front and rear ends when the differential pull-out guide device is in the closed position. It is also conceivable and feasible to design the main body guide rail 3 to be shorter than the pull-out guide rail 1 and to be offset forward relative to the rear end of the pull-out guide rail in the closed position of the pull-out guide device.

[0070] In the closed position of the differential pull-out guide device, the distance 'a' between the rear end of the intermediate guide rail 2 and the rear end of the main guide rail 3 is preferably greater than 5% of the length of the main guide rail 3, and particularly preferably greater than 10%. In this embodiment, this distance 'a' is approximately 15% of the length of the main guide rail 3.

[0071] A lateral guide wheel 13f is rotatably supported on the base 13e of the adjusting component 13 around a vertical axis. This lateral guide wheel 13f engages with the vertical flange 3d of the main guide rail 3 on one side of the adjusting component 13, and with the vertical flange 1d of the pull-out guide rail 1 on the opposite side (the other side) of the adjusting component 13 (see especially...). Figure 19 and Figure 20 Therefore, despite the relatively short design of the intermediate guide rail 2, good lateral stability of the pull-out guide is achieved in both the closed position and the first section of the pull-out guide. When attempting to rotate a furniture component that can be pulled out by the differential pull-out guide about a vertical axis in the closed position or within the first section of the differential pull-out guide, the differential pull-out guide of the present invention provides greater resistance to such rotation. Furthermore, the reduced friction also improves the operating characteristics of the pull-out guide.

[0072] The first section pulled out by the differential pull-out guide device is preferably 10% to 30% of the total pull-out distance. The lateral guide wheel in the first section works in conjunction with both the vertical flange 3d of the main guide rail 3 and the vertical flange 1d of the pull-out guide rail 1.

[0073] The following will use... Figures 21 to 23 (The locking fastener 17 on the intermediate guide rail is not shown in these figures) to explain the insertion of the intermediate guide rail 2, removed from the main guide rail 3, into the main guide rail 3. First, the adjusting member 13 is moved to the released position. Next, the intermediate guide rail 2 is pivoted to the tilt position and its rear end is inserted into the intermediate space between the horizontal flanges 3b and 3c of the main guide rail. During this process, the adjusting member 13 pivots about the pivot axis 14. Figure 21The diagram shows the state exactly when the stop surface 12 of the intermediate guide rail 2 is guided past the stop element 11 of the main guide rail 3. Then, the intermediate guide rail 2 can tilt towards its normal position (rotate about the axis of the differential wheel 7) with its front end lowered (i.e., its rear end raised) and then be further pushed into the main guide rail 3. Figure 22 The image precisely illustrates this state, in which the base 13e abuts against the contact surface 3e of the main guide rail 3. This is the case when the intermediate guide rail 2 is about to be pushed into position. If the intermediate guide rail is now fully moved into the pushed-in position, then the contact surface 3e will move the adjusting component 13 towards the locked position. See [reference needed]. Figure 23 Therefore, when the intermediate guide rail is pushed into the push-in position, the adjustment component 13 is automatically adjusted from the release position to the lock position.

[0074] If the intermediate guide rail 2 is subsequently pulled out again, then at the pulled-out position, the stop surface 12 of the intermediate guide rail 2 will abut against the stop element 11 of the main guide rail 3, thereby preventing the intermediate guide rail 2 from being pulled out further. See [reference needed]. Figure 24 .

[0075] If the intermediate guide rail 2 needs to be completely removed from the main guide rail 3 again later, then the intermediate guide rail 2 should be moved to the corresponding position. Figure 24 Pull out to the extended position, and adjust the adjusting component 13 to the released position. Now, the intermediate guide rail 2 can be moved from the normal position to the corresponding position. Figure 21 The tilting position is tilted (i.e., rotated or pivoted about the axis of the differential wheel). The stop surface 12 of the intermediate guide rail 2 can be guided under the stop element 11 of the main guide rail 3, after which the intermediate guide rail 2 can be completely pulled out of the main guide rail 3.

[0076] The following uses Figures 25-31 A second embodiment of the adjusting member with a modified version of the present invention will be described below. Except for the differences described below, its construction design corresponds to that of the first embodiment; in this regard, the description of the first embodiment and the modifications mentioned therein can be referenced in a similar manner.

[0077] The roller 13d of the adjusting member 13 is constructed to be smaller and engages only with the upward-facing raceway 3a of the lower horizontal flange 3b of the main guide rail 3. For this purpose, additionally, an auxiliary roller 13g is rotatably supported on the base 13e of the adjusting member 13 about a horizontal axis perpendicular to the pull-out direction 6. This auxiliary roller engages only with the downward-facing raceway 1a of the horizontal flange 1b of the pull-out guide rail 1. Therefore, in this embodiment, load transfer from the pull-out guide rail 1 to the main guide rail 3 is also possible via the adjusting member 13, achieved through the auxiliary roller 13g, the base 13e, and the roller 13d.

[0078] In this embodiment, the lateral guide wheel 13f is constructed to be smaller and only interacts with the vertical flange 3d of the main guide rail 3, particularly see Figure 30 and Figure 31 For this purpose, an additional lateral guide wheel 13h is provided, which only cooperates with the vertical flange 1d of the pull-out guide rail 1. This is especially evident from... Figure 30 and Figure 31 As can be seen, in the closed position of the pull-out guide device and in the first section of the pull-out guide device being pulled out, if a force oriented toward the rear end of the pull-out guide rail 1 is applied to the main guide rail 3, then the force is transmitted to the vertical flange 3d of the main guide rail 3 through the lateral guide wheel 13f, the base 13e and the additional lateral guide wheel 13h.

[0079] The first section pulled out by the differential pull-out guide device is preferably 10% to 30% of the total pull-out distance, and the additional lateral guide wheel 13h cooperates with the vertical flange 1d of the pull-out guide rail 1 in this first section.

[0080] Alternatively, a hybrid form between the first and second embodiments can be achieved, namely: the adjusting component 13 may have a roller 13d, a lateral guide wheel, and an additional lateral guide wheel. The roller engages with the opposing raceways of the pull-out guide rail and the main guide rail. One of the lateral guide wheel and the additional lateral guide wheel engages with the vertical flange of the main guide rail, and the other engages with the vertical flange of the pull-out guide rail. Alternatively, the adjusting component may have a roller, an additional roller, and a lateral guide wheel. One of the roller and the additional roller engages with the raceway of the main guide rail, and the other engages with the raceway of the pull-out guide rail. The lateral guide wheel engages with both the vertical flange of the main guide rail and the vertical flange of the pull-out guide rail.

[0081] List of reference numerals

[0082] 1. Pull out the guide rail; 8. Support wheels

[0083] 1a Roller track 9 Rollers

[0084] 1b Horizontal flange 10 Roller

[0085] 1c Lower horizontal flange 11 Stopping element

[0086] 1d vertical flange with 12 stop surfaces

[0087] 2. Intermediate guide rail; 13. Adjustment components

[0088] 2a Vertical flange 13a Axle journal

[0089] 2b Vertical section 13b Arm

[0090] 2c Lower horizontal flange 13c Abutment part

[0091] 2D retaining surface 13D roller

[0092] 3. Main body guide rail 13e base

[0093] 3a Raceway 13f Lateral Guide Wheel

[0094] 3b Lower horizontal flange with 13g additional roller

[0095] 3C upper horizontal flange 13h additional lateral guide wheel

[0096] 3D vertical flange 13i abutment section

[0097] 3e Collision Surface 13j Spring Element

[0098] 4. Furniture body 14. Pivot axis

[0099] 5 pull-out furniture parts with 15 elongated holes

[0100] 6 Pull-out direction 16 Self-pull-in mechanism

[0101] 7 differential wheels 17 locking fasteners

Claims

1. A differential pull-out guide device for a pull-out furniture component, the differential pull-out guide device having a main guide rail (3) that can be mounted on a furniture body (4), a pull-out guide rail (1) that can be mounted on a pull-out furniture component (5), and an intermediate guide rail (2) disposed between the main guide rail (3) and the pull-out guide rail (1); wherein, The pull-out guide rail (1) and the intermediate guide rail (2) can be pulled out from a closed position of the differential pull-out guide device along the pull-out direction (6) to an open position of the differential pull-out guide device; and, in the open position of the differential pull-out guide device, the pull-out of the intermediate guide rail (2) from the main guide rail (3) is restricted by a stop element (11) of the main guide rail (3), and a stop surface (12) of the intermediate guide rail (2) abuts against the stop element; wherein, in the region of the rear end portion of the intermediate guide rail (2), an adjustment member (13) is supported on the intermediate guide rail (2), the adjustment member being able to The intermediate guide rail (2) is adjusted between a release position and a locking position. In the release position, the intermediate guide rail (2) can tilt relative to the main guide rail (3) about a horizontal axis perpendicular to the pull-out direction (6) of the intermediate guide rail (2) from a normal position to a tilting position. In the tilting position, the rear end of the intermediate guide rail is lowered relative to the normal position, and the stop surface (12) of the intermediate guide rail (2) can be guided past the stop element (11) of the main guide rail (3) to remove the intermediate guide rail (2) from the main guide rail (3). In the locking position, the intermediate guide rail (2) can tilt relative to the main guide rail (3) about a horizontal axis perpendicular to the pull-out direction (6) of the intermediate guide rail (2) from the main guide rail (3). The intermediate guide rail (2) is prevented from tilting from its normal position to its tilting position; and a lateral guide wheel (13f) is rotatably supported on the base (13e) of the adjusting member (13), the lateral guide wheel engaging with the vertical flange (3d) of the main guide rail (3); characterized in that the intermediate guide rail (2) is constructed to be shorter than the main guide rail (3) and shorter than the pull-out guide rail (1), and the rear end of the intermediate guide rail (2) is in the pushed-in state of the differential pull-out guide device relative to the rear end of the main guide rail (3) and relative to the rear end of the pull-out guide rail (1). Forward bias; and, the lateral guide wheel (13f) of the adjusting member (13) cooperates with the vertical flange (1d) of the pull-out guide rail (1) on one side of the adjusting member (13) opposite to the vertical flange (3d) of the main guide rail (3), or, an additional lateral guide wheel (13h) is additionally rotatably supported on the base (13e) of the adjusting member (13), which cooperates with the vertical flange (1d) of the pull-out guide rail (1) on one side of the adjusting member (13) opposite to the vertical flange (3d) of the main guide rail (3).

2. The differential pull-out guide device according to claim 1, characterized in that, The intermediate guide rail (2) has a rotatably supported differential wheel (7) that transmits load. The differential wheel has a gap in the vertical direction relative to the intermediate guide rail (2) and rolls between the upward-facing raceway (3a) of the main guide rail (3) and the downward-facing raceway (1a) of the pull-out guide rail (1) from the pushed-in state to the pulled-out state of the differential pull-out guide device.

3. The differential pull-out guide device according to claim 2, characterized in that, A roller (13d) is rotatably supported on the base (13e) of the adjusting member (13). At least in the first section where the differential pull-out guide device pulls out from its closed position, the roller rolls between the upward-facing raceway (3a) of the main guide rail (3) and the downward-facing raceway (1a) of the pull-out guide rail (1), and the roller is able to transfer the load from the pull-out guide rail (1) to the main guide rail (3); or, a roller is rotatably supported on the base (13e) of the adjusting member (13). 13d) and an additional roller (13g), wherein the roller (13d) cooperates with the upward-facing raceway (3a) of the main guide rail (3), and at least in the first section where the differential pull-out guide device pulls out from the closed position of the differential pull-out guide device, the additional roller (13g) cooperates with the downward-facing raceway (1a) of the pull-out guide rail (1), wherein the load can be transferred from the pull-out guide rail (1) to the main guide rail (13) through the additional roller (13g), the base (13e) and the roller (13d).

4. The differential pull-out guide device according to claim 3, characterized in that, In the area of ​​the intermediate guide rail (2) located behind the differential wheel (7), only the roller (13d) of the adjusting component (13) cooperates with the upward-facing raceway (3a) of the main guide rail (3).

5. The differential pull-out guide device according to any one of claims 1 to 4, characterized in that, The adjusting component (13) is able to pivot relative to the intermediate guide rail (2) about a horizontal pivot axis (14) perpendicular to the pull-out direction in the release position to lower the rear end of the intermediate guide rail (2), and is locked in the locking position to prevent pivoting about the pivot axis (14).

6. The differential pull-out guide device according to claim 5, characterized in that, To allow the adjusting member (13) to be adjusted between a locked position and a released position, the pivot axis (14) of the adjusting member (13) is movable relative to the intermediate guide rail (2), wherein, in the locked position of the adjusting member (13), the base (13e) of the adjusting member (13) engages with a retaining surface (2d) of the intermediate guide rail (2) to lock the pivotability of the adjusting member (13).

7. The differential pull-out guide device according to claim 6, characterized in that, When the adjusting component (13) is in the released position, during the process of the differential pull-out guide moving from the open position to the closed position, the adjusting component (13) abuts against a contact surface (3e) of the main guide rail (3), which pushes the adjusting component (13) into the locked position.

8. The differential pull-out guide device according to claim 6, characterized in that, The adjusting component (13) has two forward-protruding arms (13b), and a journal head (13a) is provided on the opposite sides of the arms, wherein these journal heads (13a) form the pivot axis (14) of the adjusting component (13), and the journal head is fitted into an elongated hole (15) in an opposite vertical section (2b) of the intermediate guide rail (2).

9. The differential pull-out guide device according to claim 7, characterized in that, The adjusting component (13) has two forward-protruding arms (13b), and a journal head (13a) is provided on the opposite sides of the arms, wherein these journal heads (13a) form the pivot axis (14) of the adjusting component (13), and the journal head is fitted into an elongated hole (15) in an opposite vertical section (2b) of the intermediate guide rail (2).

10. The differential pull-out guide device according to any one of claims 1 to 4, characterized in that, During the pivoting of the adjusting component (13), as the rear end of the intermediate guide rail (2) descends, at least one spring element (13j) is elastically deflected and a restoring force is generated on the adjusting component (13) to rotate it back to a position that allows the adjusting component (13) to be adjusted towards the locking position.

11. The differential pull-out guide device according to claim 5, characterized in that, During the pivoting of the adjusting component (13), as the rear end of the intermediate guide rail (2) descends, at least one spring element (13j) is elastically deflected and a restoring force is generated on the adjusting component (13) to rotate it back to a position that allows the adjusting component (13) to be adjusted towards the locking position.

12. The differential pull-out guide device according to claim 6, characterized in that, During the pivoting of the adjusting component (13), as the rear end of the intermediate guide rail (2) descends, at least one spring element (13j) is elastically deflected and a restoring force is generated on the adjusting component (13) to rotate it back to a position that allows the adjusting component (13) to be adjusted towards the locking position.

13. The differential pull-out guide device according to claim 7, characterized in that, During the pivoting of the adjusting component (13), as the rear end of the intermediate guide rail (2) descends, at least one spring element (13j) is elastically deflected and a restoring force is generated on the adjusting component (13) to rotate it back to a position that allows the adjusting component (13) to be adjusted towards the locking position.

14. The differential pull-out guide device according to claim 8, characterized in that, During the pivoting of the adjusting component (13), as the rear end of the intermediate guide rail (2) descends, at least one spring element (13j) is elastically deflected and a restoring force is generated on the adjusting component (13) to rotate it back to a position that allows the adjusting component (13) to be adjusted towards the locking position.

15. The differential pull-out guide device according to claim 9, characterized in that, During the pivoting of the adjusting component (13), as the rear end of the intermediate guide rail (2) descends, at least one spring element (13j) is elastically deflected and a restoring force is generated on the adjusting component (13) to rotate it back to a position that allows the adjusting component (13) to be adjusted towards the locking position.

16. The differential pull-out guide device according to any one of claims 1 to 4, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

17. The differential pull-out guide device according to claim 5, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

18. The differential pull-out guide device according to claim 6, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

19. The differential pull-out guide device according to claim 7, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

20. The differential pull-out guide device according to claim 8, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

21. The differential pull-out guide device according to claim 9, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

22. The differential pull-out guide device according to claim 10, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

23. The differential pull-out guide device according to claim 11, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

24. The differential pull-out guide device according to claim 12, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

25. The differential pull-out guide device according to claim 13, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

26. The differential pull-out guide device according to claim 14, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

27. The differential pull-out guide device according to claim 15, characterized in that, The intermediate guide rail (2) has all the rollers of the differential pull-out guide device.

Images