CN105636481B - The support roller of floating support - Google Patents

Abstract

The invention relates to a drawer pull-out device (10), comprising: a body rail with a fixing section for fixing on a furniture body; a drawer rail (1) to be fixed on a drawer (11), said drawer rail movably supported relative to the body rail (3); an intermediate rail (2), which is movably supported between the body rail (3) and the drawer rail (1), wherein , the middle rail has lateral webs facing the fixing section; a support (6) with at least one support roller (5) is provided, via which the drawer rail (1) can be supported On the body rail (3); the at least one supporting roller (5) is vertically movable supported via the bearing (6), and the supporting roller (5) is arranged on the middle rail (2 ) between the lateral connecting piece (14) and the fixed section (15) of the body rail (3).

Description

Floating support rollers

technical field

The invention relates to a drawer pull-out device, which comprises: a body rail with a fixing section for fixing on a furniture body; Bearing; middle rail, which is movably mounted between the body rail and the drawer rail, wherein the middle rail has lateral webs facing the fastening section.

Background technique

Drawer pull-outs of a similar type already belong to the prior art. In conventional drawer extensions, however, the problem can arise that the rolling elements are loaded by permanently acting forces (for example the weight of a filled drawer) and thus deform. In particular, the forces acting on the rolling elements in the closed state of the drawer extension are higher than those acting on the rolling elements during the drawer extension process.

Contents of the invention

The object of the invention is to provide a drawer extension of the type mentioned at the outset, which is designed such that the rolling elements are unloaded as soon as the drawer extension has been moved into the closed end position of the drawer.

According to the invention, this is achieved by a drawer extension comprising: a body rail with a fastening section for fastening to the furniture body; a drawer rail to be fastened to the drawer, the a drawer track is movably supported relative to the body track; an intermediate track is movably supported between the body track and the drawer track, wherein the intermediate track has a direction toward the fixed The lateral webs of the segments, wherein there is provided a support with at least one support roller via which the drawer rail can be supported on the body rail, wherein the at least one support roller via the The support member is supported vertically movably, and the support roller is arranged between the lateral connecting piece of the middle rail and the fixed section of the body rail.

Typical drawer extensions are known which are arranged on the central rail or the front end region of the drawer rail and have inner rollers. The inner rollers are arranged to support the drawer rail or a drawer connected thereto in the closed state. By means of the inner rollers, the rolling bodies can be relieved of the weight of the drawer and thus protected from deformation, for example shaped as load-transmitting rollers which are movably mounted between the individual rails to transmit the drawer's weight. load. Furthermore, the inner rollers cause the drawer to be raised slightly in the closed state and prevent the drawer from being lowered undesirably. The seams running horizontally between the front panels of drawers arranged one above the other of the cabinet thus have a constant width, so that the seam image visible from the outside is also visually attractive.

According to the invention it is proposed that the support rollers are supported on the central rail, preferably on lateral webs of the central rail. In other words, the support rollers are not fastened in the inner region of the central rail or of the running rail, but can be supported on planar side webs of the central rail.

Furthermore, it is proposed that the lateral webs of the central rail run parallel to the fastening section of the body rail. By providing support rollers extending between the central rail and the body rail, it is now possible to distribute the task of raising and supporting the rail to the internal rollers and the support rollers in conjunction with additional internal rollers, for example arranged in the drawer rail or the central rail. Thus, support rollers mounted laterally on the central rail can, for example, take over the task of raising the central rail and the drawer rail via the body rail, and inner rollers mounted in the central rail known from the prior art take over the lifting of the central rail and the drawer rail via the body rail. The track supports the function of the middle track and the drawer track.

In another embodiment, the supporting rollers can solely perform the functions of raising and supporting. A simple construction is achieved by the provision of support rollers on the support. Said supports are fixed rigidly to the lateral webs of the central rail. The lateral webs are areal regions of the profiled part that function as central rails. The support roller thus extends in the region between the lateral webs and the fastening section of the body rail, which is likewise the surface formed by the profiled part. In the installed position of the drawer extension, the two surfaces, namely the fastening section and the lateral webs, are parallel to one another in the vertical position.

If one looks at the axial projection of the support rollers, they are located at least with their semicircular area in the lower half of the lateral webs, also protruding beyond the lower edge of the central rail.

The bearing for the support roller has a recess in which the support roller is supported vertically displaceable in a limited manner. The width of the recess is greater than the diameter of the receiving section of the support roller. The support roller is thus guided in said recess, however with a significant play.

In a more detailed view, said recess can be defined via two longitudinal extensions. The first longitudinal extension is inclined with respect to the horizontal plane, and the second longitudinal extension is offset with respect to the vertical plane. This results in a recess on which the support roller can be moved obliquely from bottom to top.

There is a slope on the body track. The ramp can be defined in three sections. Uphill areas, sliding areas and downhill areas. If the drawer extension is now retracted, the loosely mounted supporting roller moves upwards on the uphill region of the ramp, then moves on the sliding region and can then be unloaded again on the downhill region according to an embodiment.

The drawer rail has a sliding surface formed at right angles to the lateral webs. Said sliding surface co-operates with the support roller from the moment the support roller goes uphill to the slope. As a result, the drawer rail is raised and possibly also supported. If the support roller is moved between the sliding surface and the ramp, it can still move horizontally because, as already described above, the width of the recess is greater than the diameter of the receiving area of the roller. This results in the advantage of the shaftless mounting and the resulting lower sliding forces acting on the support rollers.

Description of drawings

Further details and advantages of the invention are explained with reference to the exemplary embodiment shown in the drawing. Shown here:

Figures 1a-1c show a side view of a part of the drawer puller together with a front detail view of the area of action of the support roller;

Fig. 2 shows a perspective view of the drawer pull-out device in an exploded state;

Figures 3a-3b show detailed views of the support and the support roller together with a cross-sectional view of the support roller on the support and an oblique view of the support roller in the installed and disassembled state;

Figures 4a-4c show side views of a drawer puller as a possible embodiment comprising a combination of support rollers and inner rollers;

Figure 5 shows an oblique view of the drawer puller as a possible embodiment comprising a combination of support rollers and inner rollers;

Figures 6a-6c show schematic diagrams of internal rollers and support rollers cooperating with various tracks and ramps;

Figures 7a-7b show a schematic view of a support roller together with front and side views.

Detailed ways

FIG. 1a shows the drawer extension 10 in the extended state. In the upper region, the drawer rail 1 , the side webs 14 located below it, which belong to the central rail 2 , and the ramp 12 on the body rail 3 can be seen. The support rollers 5 rest on a support 6 which is fixedly connected to the lateral webs 14 belonging to the central rail 2 . In the detail view visible below it, see support roller 5 or in the upper side view, it can be seen that support roller 5 is located in the region in front of ramp 12 and thus remains loose in its recess 19 . There is therefore no interaction between the ramp 12 , the support roller 5 and the running surface 8 on the drawer rail 1 . The individual rails thus slide on their rolling bodies 7 and 9 and the support rollers 5 remain unloaded.

FIG. 1 b shows how, during the closing process of the drawer extension 10 , the support roller 5 now moves upwards in its recess 19 on the upward slope of the ramp 12 and comes into contact with the sliding surface 8 on the drawer rail 1 . In this region, the center rail 2 and the drawer rail 1 are now no longer supported only by the rolling bodies 7 and 9 , but also by the support rollers 5 . In the detailed view it can be seen how the gap between the body rail 3 and the middle rail 2 becomes larger because said middle rail is raised and supported.

FIG. 1 c shows the retracted state of the drawer extension, wherein the support roller 5 is now on the sliding surface of the ramp 12 . In this highest region of the ramp 12, the center rail 2 and the slide rail 1 are now lifted and supported by the support rollers 5, and the rolling bodies 7 and 9 can be unloaded.

The disassembled drawer extension 10 , which is formed by the body rail 3 with the fastening section 15 , can be seen in the oblique view in FIG. 2 . The fastening section 15 forms a vertical surface when the drawer extension is in the installed position. By means of said fastening section 15 , the body rail is connected to the furniture body and thus supports the entire unit of the drawer extension 10 . Rolling bodies 7 are provided on the body rail 3 , on which the intermediate rail 2 is then arranged movably in the longitudinal direction. Rolling bodies 9 are provided on the central rail 2 and are displaceable in cooperation with the drawer rail 1 along the longitudinal axis of the drawer extension 10 . Here too, a combination comprising a support roller 5 and an inner roller 4 is now shown as an additional embodiment, wherein the inner roller 4 and the inner support 20 are located in the end region of the drawer rail 1 .

FIG. 3 a shows the support roller 5 and the bearing 6 on the left. The shown vertical section A/A shows that there is a distance between the roller 5 and the support 6 . It can be seen here that the diameter of the receiving area of the support roller 5 is smaller than the width of the recess 19 . This means that this is a shaftless roller, which has the advantage of low sliding forces.

FIG. 3 b shows the mounted and disassembled support roller 5 together with the bearing 6 and the recess 19 . The recess 19 is formed obliquely in order to be able to ensure the upward and downward movement of the support roller 5 .

FIG. 4 a shows a combination comprising a support roll 5 and an inner roll 4 . Works with drawer rail 1, middle rail 2 and body rail 3. The support roller 5 is not yet in a state of being raised by the ramp 12 . This means that the drawer extension is located in the region before the end position and the drawer rail 1 or the center rail 2 moves on its rolling bodies 7 and 9 .

Figure 4b shows how the support rollers 5 lie on the ramp 12 and how the middle rail 2 or drawer rail 1 is raised. The inner roller 4 is still free in this region on its inner support 20 and is not yet loaded.

FIG. 4 c now shows how the support roller 5 is situated on the downhill region of the ramp 12 . The inner roller 4 now assumes the function of the outer roller 5 and the drawer rail 1 is supported by the body rail 3 on the support surface 18 of the drawer rail by means of the sliding surface 17 of the body rail. The support rollers 5 can already be completely unloaded in this region, while the inner rollers 4 can take up all the load.

FIG. 5 shows an oblique view of an embodiment in which the inner roller 4 is combined with the outer roller 5 in a withdrawn state before the support roller 5 goes up the slope and the inner roller 4 contacts the sliding surface 17 of the body rail 3 .

FIG. 6 a shows the already mentioned embodiment comprising the combination of the inner roller 4 and the support roller 5 on the drawer extension 10 . In this illustration it can be seen how the support rollers 5 are located outside the active area of the ramp 12 and how the inner rollers are also located outside the active area of the sliding surface 17 .

FIG. 6 b schematically shows how the support rollers 5 lie on the slope, how the middle rail 2 and the drawer rail 1 are raised, and how the inner rollers 4 cooperate with the sliding surface 17 and the support surface 18 . Here, the task of supporting and raising the support roller 5 is now transferred to the inner roller 4 , which was raised by the support roller 5 shortly before.

FIG. 6c shows schematically how the support roller 5 is now unloaded in the downhill region of the ramp 12 and the inner roller 4 assumes the retaining function.

FIG. 7 a shows a schematic detail view of the support roller 5 in the extended state in the extension direction of the drawer extension 10 . Arrow A shows the projection direction of Fig. 7b.

FIG. 7 b shows a schematic detail view of the support roller 5 in projection A. FIG. Projection A shows the support roll divided into two areas F1 and F2. The area F2 is covered in this figure by the central rail 2 , and the area F1 of the support roller 5 can be seen below the lower edge 21 . The area F1 is at least 20% of the projected circular area of the support roller 5 in the drawn state of the drawer extension 10 . At least half of the circular area of the support roller 5 , referred to as the face F2 , is located in the region of the lateral webs 14 of the central rail 2 .

Claims (19)

1. A drawer puller (10), comprising: - a body rail with a fastening section for fastening to the furniture body; - a drawer rail (1) to be fixed on the drawer (11), said drawer rail being movably supported relative to said body rail (3); - An intermediate rail (2) movably supported between the body rail (3) and the drawer rail (1), wherein the intermediate rail has a side facing the fixed section to the connecting piece, It is characterized in that, - providing a support (6) with at least one support roller (5) via which the drawer rail (1) can be supported on the body rail (3), wherein the at least one support The roller (5) is vertically displaceably supported via said support (6), - said support rollers (5) are arranged between the lateral webs (14) of said intermediate rail (2) and the fixed section (15) of said body rail (3). 2. The drawer extension as claimed in claim 1, characterized in that the support (6) is supported on the central rail (2). 3. Drawer extension according to claim 1, characterized in that the support element (6) is supported on lateral webs (14) of the central rail (2). 4. The drawer extension device according to one of claims 1 to 3, characterized in that the lateral webs (14) of the central rail (2) are parallel to the fixed section of the body rail (3) (15) EXTENSION. 5. The drawer pull-out device according to one of claims 1 to 3, characterized in that the lateral webs (14) of the middle rail (2) and the fixing section ( 15) In the installed position of the drawer puller (10) is a substantially vertically oriented surface. 6. The drawer extension device according to one of claims 1 to 3, characterized in that the lateral webs of the central rail (2) and the fastening section (15) of the body rail (3) are The surface of the profiled part, the surface of the profiled part is configured in the longitudinal direction. 7. The drawer extension device according to one of claims 1 to 3, characterized in that the lateral webs of the central rail (2) and the fastening section (15) of the body rail (3) are The surface of the shaped part profile, which is structured in the longitudinal direction and is at least partially planar. 8. The drawer pull-out device according to any one of claims 1 to 3, characterized in that, in the withdrawn state of the drawer pull-out device (10), the horizontal and axial directions of the support rollers (5) Projected with at least a semicircular area (F2) of the support roller in the lower half of the lateral web (14) of the middle rail (2), wherein the support roller protrudes here partially beyond the middle The lower edge of the track (2). 9. The drawer pull-out device according to claim 8, characterized in that, in the withdrawn state of the drawer pull-out device (10), the horizontal, axial projection of the support roller (5) is supported by the support At least 20% of the circular area (F1) of the rollers lies below the lower edge (21) of the intermediate track (2). 10. The drawer pull-out device according to any one of claims 1 to 3, characterized in that the support (6) has a recess (19), along which the support roller (5) is limited to The way can be supported vertically. 11. The drawer pull-out device according to one of claims 1 to 3, characterized in that the support (6) has a U-shaped recess (19), and the support roller (5) runs along the recess Supported vertically movable in a restricted manner. 12. The drawer extension according to claim 10, characterized in that each rail of the drawer extension (10) has a first longitudinal extension and the recess (19) of the support (6) has a A second longitudinal extension, wherein the second longitudinal extension extends both obliquely with respect to the horizontal plane and also deviates from the vertical plane. 13. The drawer extension device according to one of claims 1 to 3, characterized in that the body rail (3) has a slope (7). 14. The drawer extension device according to one of claims 1 to 3, characterized in that the drawer rail (1) has a support surface (18) formed at right angles to the lateral connecting piece (14). 15. The drawer extension according to claim 13, characterized in that the support roller (5) can be raised via the ramp (7) when the drawer extension (10) is closed. 16. The drawer pull-out device according to any one of claims 1 to 3, characterized in that the drawer rail (1) can pass through the support surface ( 18) Be elevated. 17. The drawer pull-out device according to claim 10, characterized in that the body rail (3) has a slope (7), which goes up to the slope (7) and makes the drawer rail (1 ) The raised support roller (5) can move loosely in said recess (19) in the horizontal position. 18. The drawer extension as claimed in one of claims 1 to 3, characterized in that the support (6) is fixed rigidly on the central rail (2). 19. The drawer extension as claimed in one of claims 1 to 3, characterized in that the support roller (5) can be produced at least partially from plastic and/or metal.