DE102021200261A1 - roller carriage - Google Patents

Abstract

The invention relates to a roller carriage for a sliding door, which has at least two rollers for rolling on a track of the sliding door and at least one counter roller that is height-adjustable perpendicular to the axes of the rollers for movement in a direction of movement, the counter roller having a first inclined surface on one sliding block is mounted, which in turn is movably mounted on the roller carriage in a direction perpendicular to the axes of the rollers and perpendicular to the direction of movement of the roller carriage, the first inclined surface for adjusting the height of the counter roller interacting with a second inclined surface, which is formed on a sliding wedge that is movably guided on the roller carriage is.

Description

The invention relates to a roller carriage for a sliding door, which has at least two rollers for rolling on a track of the sliding door and at least one height-adjustable counter roller perpendicular to the axes of the rollers for movement in a direction of movement.

Such a roller carriage is known in principle and is used both for storage and for moving a door leaf of the sliding door that is attached to the roller carriage. During the movement of the door leaf, for example between an open position and a closed position of the sliding door, the rollers of the roller carriage roll on the track of the sliding door. At the same time, the counter roller runs along a counter track that is at least approximately parallel to the track, as a result of which the door leaf is guided more securely overall during its movement. In particular, the counter roller serves to secure the roller carriage against a moment acting on the roller carriage. For example, such a moment can be caused by a wind load acting on the door leaf. Additionally or alternatively, the counter roller can also fulfill the function of a safety roller, which ensures that the roller carriage cannot be lifted out.

To assemble the roller carriage between the raceway and the opposite raceway, the roller carriage is first placed on the raceway using the rollers. The height of the counter-roller is then adjusted in such a way that the counter-roller comes into contact with the opposite track for rolling. Up to now, the height of the counter roller has been adjusted primarily by means of an eccentric bearing of the counter roller or by displacing the counter roller by means of a lever.

The problem with both height adjustment options has turned out to be that the height position of the counter roller cannot be adjusted finely enough. This has the consequence that in the case of so-called overtension, in which the counter roller presses too hard against the counter-track, the roller carriage runs too stiffly and in the case of so-called under-tension, in which the counter roller is not or not sufficiently in contact with the counter-track, the roller carriage too a lot of game going. If there is too much play, the counter roller can no longer perform its function as a load bearing or as a safety roller.

It is therefore an object of the invention to create a roller carriage which overcomes the disadvantages mentioned above, in particular in which the height position of the counter roller can be adjusted as precisely as possible.

The object is achieved by a roller carriage with the features of claim 1 and in particular in that the counter roller is mounted on a sliding block having a first inclined surface, which in turn can be moved on the roller carriage in a direction perpendicular to the axes of the rollers and perpendicular to the direction of movement of the roller carriage is mounted, wherein the first inclined surface for height adjustment of the counter roller interacts with a second inclined surface, which is formed on a sliding wedge guided on the roller carriage.

The invention is based on the general idea that the height of a counter roller of a roller carriage can be adjusted particularly finely due to the interacting inclined surfaces, since a slight displacement of the sliding wedge already causes a slight movement of the sliding block supporting the counter roller due to the interacting inclined surfaces. This results in the advantage that the height of the counter roller can be adjusted particularly precisely, so that the roller carriage is guided smoothly and without play between the running track and the counter running track.

At this point it should be noted that the height is defined as the direction which is perpendicular to the direction of movement of the roller carriage and perpendicular to the axes of the rollers.

Advantageous developments of the invention can be found in the dependent claims, the description and the drawings.

The sliding wedge can be moved particularly easily if an adjusting screw is provided for moving the sliding wedge. A rotation of the adjusting screw causes a displacement of the adjusting screw in the direction of movement of the roller carriage. The displacement of the adjusting screw in turn causes a displacement of the sliding wedge and ultimately a displacement of the sliding block and the counter roller mounted on it. The adjusting screw is arranged in particular on the side on the edge of the roller carriage and is therefore very easy to reach, which means that the roller carriage is also ideally suited for use in cramped conditions.

Since only one set screw is required to adjust the height of the counter roller, the height of the counter roller can be adjusted with one hand. Additional support of the counter-roller by means of a lever is not required, since the sliding block is attached to the inclined surface via its inclined surface of the sliding wedge is already sufficiently supported. Advantageously, the thread of the adjusting screw prevents an already set height of the counter roller from being reset again. In particular, the thread of the screw can be designed as a self-locking thread for this purpose.

For actuation, the adjusting screw can have an attachment feature for a tool, so that the height of the counter roller can be adjusted in a simple manner using a commercially available tool. For example, the attack feature can be an external or internal hexagon, as a result of which the adjusting screw can be adjusted using a socket wrench or ratchet wrench. Moreover, the attack feature can also be formed by a slot or slots for a screwdriver.

A particularly compact design of the roller carriage can be achieved if the sliding wedge can be displaced at least approximately parallel to the direction of movement of the roller carriage. A displacement of the sliding wedge in the direction of movement of the roller carriage is deflected by the interacting inclined surfaces of the sliding wedge and sliding block into a change in height of the sliding block and the counter roller attached to it. Due to the fact that the sliding wedge is aligned parallel to the direction of movement, the sliding wedge can be actuated in a particularly easily accessible manner from the side.

A particularly simple and cost-effective production is made possible by the fact that the first inclined surface forms an outer surface of the sliding block and/or the second inclined surface forms an outer surface of the sliding wedge.

The first inclined surface and the second inclined surface can slide along each other. The inclined surface of the sliding wedge is preferably inclined at an angle α relative to the horizontal or relative to the direction of movement of the roller carriage. The inclined surface of the sliding block is inclined at an angle β to the vertical. The angle α and the angle β add up to 90°. As a result, the direction of displacement of the sliding wedge and the direction of movement of the sliding block are aligned at an angle of 90° to one another. For example, the angle α can be 20° and the angle β can be 70°. In principle, the inclined surfaces of the sliding wedge and the sliding block can also have angles of inclination other than those just described, as long as the angles α and β together result in an angle of at least approximately 90°. The angle of inclination of the inclined surface of the sliding wedge relative to the horizontal is preferably smaller than the angle of inclination of the inclined surface of the sliding block relative to the vertical. As a result, the height of the counter roller can be adjusted particularly finely, since a long adjustment path of the sliding wedge is required for a slight change in height of the sliding block.

After adjusting the height of the counter roller, it is advantageous to fix the adjusted position of the counter roller. For this purpose, a fastening means for fixing a position of the sliding block and/or the sliding wedge can be provided. The fastening means can be implemented, for example, in the form of a locking screw or a locking clamp.

According to a particularly advantageous embodiment, at least one guide groove, which extends in particular in the direction of movement of the roller carriage, is provided on the sliding wedge and into which the fastening means for fixing the sliding wedge engages. In this way, the sliding wedge can advantageously be fixed after the height of the counter roller has been adjusted. In the mounted but not yet fixed state, the fastening means, together with the guide groove, serves to guide the sliding wedge during its displacement. As soon as a desired height of the counter roller has been set, the fastening means can then be tightened and the sliding wedge can no longer be adjusted.

For a particularly good interaction of adjusting screw and sliding wedge, an angled section, in particular extending at least approximately parallel to the axes of the rollers, can protrude from the sliding wedge as a counter bearing for the adjusting screw. As a result, a movement of the adjusting screw in the direction of movement of the roller carriage is transferred particularly efficiently to the sliding wedge. The angled section can be produced in a simple manner by angling a base body of the sliding wedge.

For an aligned alignment of the adjusting screw with respect to the angle section of the sliding wedge, a bracket is advantageously formed on the roller carriage and is aligned with the angle section in the direction of movement of the roller carriage. The bracket preferably has a threaded passage serving as a screw bearing. The threaded passage in the shackle represents a mounting of the adjusting screw that can be realized in a particularly simple and cost-effective manner. The shackle can extend at least approximately parallel to the axes of the rollers.

As already mentioned, it is possible that the thread of the adjusting screw independently adjusts an already set height of the counter role prevented. Advantageously, a lock nut is additionally or alternatively provided for fixing the adjusting screw. The locking nut fixing the adjusting screw serves in particular to prevent an unintentional adjustment of the sliding wedge or the counter roller mounted on the sliding block before the sliding wedge and/or the sliding block is fixed. A fixation of the adjusting screw is preferably achieved in that the locking nut comes to rest on a side of the bracket facing the sliding wedge.

Preferably, at least one of the following components of the roller carriage is made of high-alloy CrNiMo steel V4A: a base body of the roller carriage that supports the rollers and/or the sliding block and/or the sliding wedge and/or the adjusting screw and/or the fastener(s). This allows the roller carriage to be used in a humid and/or corrosive atmosphere. For example, an application on board a ship, a swimming pool, in the food industry or in the chemical industry is possible.

A cable guide for a cable for the power supply of the movable door leaves can also be provided on the roller carriage. The cable guide can be provided above or below the sliding wedge and/or seen in the direction of movement of the roller carriage in front of or behind the sliding block.

The invention also relates to a sliding door with a roller carriage of the type described above.

• 1 eine schematische Seitenansicht eines Rollenwagens mit einem Verschiebekeil und einem Kulissenstein zur Höheneinstellung einer Konterrolle;
• 2 eine Detailansicht des mit dem Kulissenstein zusammenwirkenden Verschiebekeils von 1;
• 3a eine Draufsicht auf den Verschiebekeil; und
• 3b eine Draufsicht auf den Kulissenstein.

The invention is described below purely by way of example using a possible embodiment with reference to the attached drawings. Show it:

• 1 a schematic side view of a roller carriage with a sliding wedge and a sliding block for height adjustment of a counter roller;
• 2 a detailed view of the sliding wedge interacting with the sliding block from 1 ;
• 3a a plan view of the sliding wedge; and
• 3b a top view of the sliding block.

In the drawings shows 1 a schematic side view of a roller carriage for a sliding door, not shown. The roller carriage can be moved in one direction of movement (double arrow B) and for this purpose has two rollers 10 for rolling on a non-illustrated track of the sliding door. The rollers 10 are rotatably mounted about their respective axes A on a base body 11 of the roller carriage. Furthermore, the roller carriage includes a counter roller 12, which is adjustable in height at least approximately perpendicular to the axes A of the rollers 10 and at least approximately perpendicular to the direction of movement B of the roller carriage. It goes without saying that the roller carriage can have more than two rollers 10 and/or more than one height-adjustable counter roller 12, depending on the area of application.

To adjust the height of the counter roller 12, a sliding block 14 is provided, which supports the counter roller 12 and which interacts with a sliding wedge 16 via inclined surfaces 26, 28, which are described in more detail below. 2 shows the sliding block 14 interacting with the sliding wedge 16 in detail. 3 shows a plan view of the sliding wedge 16 and the sliding block 14, with the sliding wedge 16 being shown in FIG 3a separate to the in 3b shown sliding block 14 is shown.

The sliding block 14 is movably mounted on the roller carriage in a direction at least approximately perpendicular to the axes A of the rollers 10 and at least approximately perpendicular to the direction of movement B of the roller carriage. For this purpose, the sliding block 14 has a projection 18 which is guided in a guide groove, not shown in the figures. To support the counter roller 12, the sliding block 14 has a bore 20 in which the axis A' of the counter roller 12 is accommodated.

The sliding wedge 16 is slidably guided in the direction of movement B on the roller carriage. To put it more precisely, the displacement wedge 16 can be displaced at least approximately parallel to the direction of movement B of the roller carriage and at least approximately perpendicular to the axes A of the rollers 10 . For this purpose, the sliding wedge 16 has at least one guide groove 22 which extends at least approximately parallel to the direction of movement B of the roller carriage and into which a fastening means 24, described in more detail below, for guiding the sliding wedge 16 engages. In the exemplary embodiment shown, the sliding wedge 16 specifically has two guide grooves 22, in each of which a fastening means 24 engages. In the exemplary embodiment, the fastening means 24 are in the form of socket head screws.

As is particularly evident from 2 As can be seen, the sliding block 14 has a first inclined surface 26 which is connected to a second inclined surface formed on the sliding wedge 16 28 interacts. The first inclined surface 26 forms an outer surface of the sliding block 14 and the second inclined surface 28 forms an outer surface of the sliding wedge 16.

The first inclined surface 26 and the second inclined surface 28 are designed in such a way that the inclined surfaces 26, 28 can slide along one another. In the illustrated embodiment, the second inclined surface 28 of the sliding wedge 16 is inclined at an angle α relative to the horizontal or relative to the direction of movement B of the roller carriage. The first inclined surface 26 of the sliding block 14 is inclined at an angle β to the vertical. The angle α and the angle β add up to 90°. In the exemplary embodiment, the angle α is 20° and the angle β is 70°.

The sliding wedge 16 can be moved in the direction of movement B of the roller carriage by turning an adjusting screw 30 . A rotation of the adjusting screw 30 has the effect that the adjusting screw 30 is displaced in the direction of movement B of the roller carriage.

So that the adjusting screw 30 can interact particularly efficiently with the sliding wedge 16 , the sliding wedge 16 has an angled section 16b which is angled at right angles from a base body 16a of the sliding wedge 16 and serves as a counter bearing for the adjusting screw 30 . In other words, the angle section 16b is aligned at least approximately parallel to the axes A of the rollers 10 when the sliding wedge 16 is in the installed state.

To align the adjusting screw 30 with respect to the angle section 16b of the sliding wedge 16, a bracket 32 is provided on the roller carriage, which is aligned parallel to the axes A of the rollers 10 and has a threaded passage serving as a screw bearing. As 1 shows, the adjusting screw 30 is aligned at least approximately parallel to the direction of movement B of the roller carriage, with a head 30a of the adjusting screw 30 protruding laterally from the roller carriage. The head 30a has a tool engagement feature. In the exemplary embodiment shown, the head 30a of the adjusting screw 30 is in the form of an external hexagon and can be actuated, for example, using a ratchet or socket wrench. Since the head 30a of the set screw 30 protrudes laterally from the roller carriage, it is easily accessible for the corresponding tool, even if a sliding door is attached to the roller carriage by means of a fastening section 36.

The functioning of the height adjustment of the control roller 12 will now be explained below.

At the beginning of the assembly of the roller carriage, the axis A' of the counter roller 12 is approximately at the same height as the axes A of the rollers 10 and the adjusting screw 30 is screwed out as far as possible. Moreover, the fastening means 24 serving to guide the sliding wedge 16 are screwed in so that they engage in the respective guide grooves 22 . However, the fastening means 24 are not yet tightened, so that the sliding wedge 16 can be moved.

After inserting the roller carriage by means of its rollers 10 on the track, the height of the counter roller 12 can be adjusted by turning the adjusting screw 30. By screwing in the adjusting screw 30, the adjusting screw 30 is displaced in the direction of movement B of the roller carriage or in the horizontal direction and at the same time the sliding wedge 16, which is acted upon by the adjusting screw 30 on the angle section 16b. Related to 1 When turning in the adjusting screw 30, the adjusting screw 30 and the sliding wedge 16 move to the right.

Due to the vertical guidance of the sliding block 14 on the roller carriage, the sliding block 14 cannot follow the horizontal movement of the sliding wedge 16 in the horizontal direction. Rather, the horizontal movement of the sliding wedge 16 is deflected by means of the inclined surfaces 26, 28 into a vertical movement of the sliding block 14, as a result of which the height of the counter roller 12 mounted on the sliding block 14 ultimately also changes.

After the desired height of the counter roller 12 has been set, fastening means are used to fix the desired position of the counter roller 12. The fastening means can basically be provided to fix the sliding block 14 and/or the sliding wedge 16. In the exemplary embodiment shown, the set position of the counter roller 12 is fixed by the fastening means 24 provided for guiding the sliding wedge 16, specifically by the fastening means 24 being tightened. The sliding wedge 16 is clamped between the base body 11 of the roller carriage and the heads of the fastening means, which heads are widened relative to the guide grooves 22 . The set height of the counter roller 12 can now no longer be changed without loosening the fastening means 24 .

A locking nut 34 is provided so that the set height of the counter roller 12 does not unintentionally change again while the sliding wedge 16 or the sliding block 14 is being fixed hen, which prevents the screw 30 unscrewed again in an unintentional manner. The locking nut 34 is brought to rest during the fixing of the sliding wedge 16 or the sliding block 14 on a side of the bracket 32 facing the sliding wedge 16, as a result of which the adjusting screw 30 can no longer unscrew.

Reference List

10

roller

11

body

12

control role

14

sliding block

16

sliding wedge

16a

body

16b

angle section

18

cantilever

20

drilling

22

guide groove

24

fasteners

26

first bevel

28

second inclined surface

30

adjusting screw

30a

head

32

tab

34

locking nut

36

attachment section

A, A'

axis

B

direction of movement

a

angle

β

angle

Claims (10)

Roller carriage for a sliding door, which for movement in a direction of movement (B) has at least two rollers (10) for rolling on a track of the sliding door and at least one counter roller (12) that is height-adjustable perpendicular to the axes (A) of the rollers (10). characterized in that the counter roller (12) is mounted on a sliding block (14) which has a first inclined surface (26) and which in turn is perpendicular to the axes (A) of the rollers (10) and perpendicular to the direction of movement (B) of the roller carriage is movably mounted on the roller carriage, the first inclined surface (26) interacting with a second inclined surface (28) for adjusting the height of the counter roller (12), which is formed on a sliding wedge (16) guided so as to be displaceable on the roller carriage. roller carriage after claim 1 , characterized in that an adjusting screw (30) is provided for moving the sliding wedge (16). roller carriage after claim 1 or 2 , characterized in that the displacement wedge (16) is displaceable at least approximately parallel to the direction of movement (B) of the roller carriage. Roller carriage according to at least one of the preceding claims, characterized in that the first inclined surface (26) forms an outer surface of the sliding block (14) and/or the second inclined surface (28) forms an outer surface of the sliding wedge (16). Roller carriage according to at least one of the preceding claims, characterized in that a fastening means (24) is provided for fixing a position of the sliding block (14) and/or the sliding wedge (16). roller carriage after claim 5 , characterized in that at least one guide groove (22) extending in particular in the direction of movement (B) of the roller carriage is provided on the sliding wedge (16) and into which the fastening means (24) for fixing the sliding wedge (16) engages. Roller carriage according to at least one of the claims 2 until 6 , characterized in that an angled section (16b) extending at least approximately parallel to the axes (A) of the rollers (10) protrudes from the sliding wedge (16) as an abutment for the adjusting screw (30). roller carriage after claim 7 , characterized in that a lug (32) is formed on the roller carriage and is aligned with the angle section (16b) in the direction of movement (B) of the roller carriage and has a threaded passage serving as a screw bearing, in particular with the lug (32) being at least approximately parallel to the axes (A) of the rollers (10). Roller carriage according to at least one of the claims 2 until 8th , characterized in that a lock nut (34) for fixing the adjusting screw (30) is provided. Sliding door with a roller carriage according to at least one of the preceding claims.

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