Castors for movable objects

Abstract

The present invention relates to a caster for a movable object, in particular a bed caster, which at least comprises a roller, a fork for receiving the roller, a guide tube pivotally constructed relative to the fork via at least one bearing, a locking device arranged on the fork side, and a braking system constructed in an anti-twist manner that can form an operative connection with the roller, characterized in that the braking system comprises a brake shoe, a brake spindle, a guide pin and a guide pot, wherein the brake spindle has a guide portion constructed in a groove shape, the guide pot is provided with a protrusion and wherein the protrusion can form an operative connection with the guide portion of the brake spindle to form an anti-twist structure.

Description

Technical Field

[0001] The invention relates to a castor for a movable object forming part of the class according to the first claim. Background Art

[0002] DE 10 2015 013 415 A1 discloses a caster for a movable object, the caster comprising at least a roller, a fork for receiving the roller, a guide tube pivotably constructed relative to the fork via at least one bearing, a locking device arranged on the fork side, and a braking system constructed in a rotationally-resistant manner capable of forming an operative connection with the roller, wherein the braking system comprises a single-sided molded fixing element which is essentially cylindrical in shape and which can form an operative connection with a polygonal locking element on the fork side to form an rotationally-resistant structure. Summary of the invention

[0003] The object of the subject matter of the invention is to provide an alternative to the prior art for a rotation lock for rollers of different designs, which has a structurally simpler design than the prior art.

[0004] This object is achieved in that the brake system comprises a brake shoe, a brake spindle, a guide pin and a guide cup, wherein the brake spindle has a guide portion constructed in a groove shape, the guide cup is provided with a projection and wherein the projection can form an operative connection with the guide portion of the brake spindle to form a rotation-proof structure.

[0005] Advantageous developments of the subject matter of the invention are apparent from the dependent claims.

[0006] In contrast to the prior art, this provides an alternative anti-twist securement which is structurally simple and can therefore be produced more cost-effectively.

[0007] The guide cup is preferably made of metal and is fixedly connected to a component of the bearing in the assembled state.

[0008] The guide pot is advantageously designed as a punched and bent part.

[0009] It is further proposed that the inner diameter of the guide cup is designed to be larger than the inner diameter of the bearing. The guide cup is fixedly connected to the inner ring of the bearing, in particular riveted.

[0010] The brake spindle should surround the guide pin.

[0011] According to another aspect of the present invention, the end faces of the brake shoe and the brake spindle facing each other are respectively provided with toothings. The two toothings engage with each other in the braked state of the roller.

[0012] The projection of the guide cup remains in the groove-shaped guide of the brake spindle in every position of the castor (braked or not braked), so that the rotation prevention is ensured in every operating state of the castor.

[0013] Furthermore, the guide pin should be positioned within the guide tube and be movable in the axial direction via an eccentric arranged in the region of the guide tube in order to thereby enable different operating states of the castor to be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The subject matter of the invention is illustrated in the drawings and described below with reference to exemplary embodiments.

[0015] Figure 1 A schematic sketch of a castor designed as a bed castor is shown in different views;

[0016] Figure 2 Shown in accordance with Figure 1 A single-piece illustration of the anti-twist structure of the caster;

[0017] Figure 3 A diagram of a brake system is shown in different views or sections;

[0018] Figure 4 Shown in accordance with Figure 1 Illustration of castors as an alternative;

[0019] Figure 5 Shown in accordance with Figure 4 A single-piece diagram of the braking system. DETAILED DESCRIPTION

[0020] Figure 1 A castor 1 designed as a bed castor is shown as a schematic diagram in various views or sections. The castor comprises a roller 2, a fork 3 for receiving the roller, and a guide tube 4 which is pivotally connected to the fork 3 via at least one bearing 5. A braking system 6 designed to prevent rotation is provided on the fork side, which brakes when Figure 2 A detailed description is given in Figure 1 , which is in operative connection with the eccentric 8 in the upper region of the guide tube 4. In addition, the following components can be seen: a brake shoe 9 operatively connected to the outer circumference 10 of the roller 2, a brake spindle 11, and a guide pot 12 designed as a metal part. The upper end face 12a is fixedly connected to the inner ring 5a of the bearing 5, in particular riveted, wherein the inner diameter d of the guide pot 12 is 1 It is configured to be larger than the inner diameter d of the bearing inner ring 5 a.

[0021] Figure 2The components of the anti-twist structure of the brake system 6 are shown as a single part. The guide pin 7 guided inside the guide tube 4 can be seen. In addition, the brake shoe 9, the brake spindle 11 and the guide pot 12 are shown. The end faces 13, 14 of the brake spindle 11 and the brake shoe 9 facing each other are provided with radial toothing 15, 16. A groove-shaped guide 18 is provided in the upper region 17 of the brake spindle 11 facing the guide pot 12. A projection 19 pointing in the direction of the upper region 17 is integrally formed on the guide pot 12 and engages in the guide 18 of the brake spindle 11 to form the anti-twist structure of the brake system 6. The guide pot 12 is designed as a cylindrical metal part. In the assembled state, the projection 19 of the guide pot 12 engages in the groove-shaped guide 18 of the brake spindle 11 in every operating state of the castor 1.

[0022] Figure 3 Shown in accordance with Figure 1 The castor 1 is shown with the brake system in the uppermost position. The projection 19 of the guide pot 12 rests in the guide 18 of the brake spindle 11. By actuating the eccentric 8, an operating state of the castor 1 can be brought about, such as braked, unbraked or pivotable. Figure 3 2 shows an operating state in which the support fork 3 and thus the roller 2 are pivotable relative to the guide tube 4 .

[0023] Figures 4 to 5 An alternative schematic diagram of a castor 1 designed as a bed castor is shown in various views and sections.

[0024] The same components are used in Figures 1 to 3 The same reference numerals are used to indicate the same reference numerals as in the figure. The caster 1, the roller 2, the fork 3, the guide tube 4 and the bearing 5 constructed in another manner can be seen. In addition, the brake system 6, the guide pin 7, the eccentric wheel 8, the brake shoe 9, the brake spindle 11 and the guide tank 12 can be seen. Figure 1 Similarly, the inner diameter d of the guide tank 12 is 1 It is also configured to be larger than the inner diameter d of the bearing inner ring 5 a of the bearing 5 .

[0025] Figure 5 The design structure of the caster 1 is shown as a single piece. Figure 2 The following components can be seen: the guide cup 12 , the projection 19 integrally formed on the guide cup 12 , the guide pin 7 , the brake spindle 11 with the groove-shaped guide 18 , and the support fork 3 .

[0026] Furthermore, the brake shoe 9, the brake shoe holder 20 and the lifting pot 21 can be seen. In the mounted state of the castor, the brake shoe 9 is positioned in a rotationally fixed manner inside the brake shoe holder 20, while the lifting pot 21 cooperates with the guide pin 7. During a change in the operating state of the castor or the brake system 6, the lifting pot 21 actuates the brake shoe 9. The brake spindle 11 is provided with a toothing 15 which runs around in the axial direction. The same applies to the brake shoe holder 20, wherein the toothing is provided with the reference numeral 16. In the operating state, the toothing 15, 16 engages with one another, wherein the toothing 15 can move relative to the toothing 16 in the axial direction.

[0027] List of reference numerals:

[0028] 1 Caster

[0029] 2 Rollers

[0030] 3 Support fork

[0031] 4 Guide tube

[0032] 5 Bearings

[0033] 5a Bearing inner ring

[0034] 6 Braking system

[0035] 7 Guide pin

[0036] 8 Eccentric wheel

[0037] 9 Brake shoes

[0038] 10 Circumferential surface

[0039] 11 Braking spindle

[0040] 12 Guide tank

[0041] 12a End face of the guide tank

[0042] 13 End face

[0043] 14 End face

[0044] 15 Teeth

[0045] 16 Teeth

[0046] 17 Braking the upper area of ​​the spindle

[0047] 18 Brake spindle guide

[0048] 19 Protrusion

[0049] 20 Brake shoe retainer

[0050] 21 Lifting tank

[0051] d Diameter of the inner ring of the bearing

[0052] d 1 Diameter of the guide tank

Claims

1. A castor for a movable object, the castor comprising at least a roller (2), a fork (3) for receiving the roller, a guide tube (4) which is pivotally configured relative to the fork (3) via at least one bearing (5), a locking device arranged on the fork side, and a braking system (6) which is configured to prevent rotation and can be operatively connected to the roller (2), in, The outer ring of the bearing is fixedly connected to the support fork (3), and the inner ring of the bearing is fixedly connected to the guide tube (4), characterized in that the brake system (6) comprises a brake shoe (9), a brake spindle (11), a guide pin (7) and a guide pot (12), wherein the brake spindle (11) has a guide portion (18) constructed in a groove shape, and the guide pot (12) is provided with a protrusion (19) and wherein the protrusion (19) can form an operative connection with the guide portion (18) of the brake spindle (11) to form an anti-twist structure, The guide pot (12) is made of metal and is fixedly connected to a component of the bearing (5) in the assembled state. The guide tank (12) is fixedly connected to the inner ring (5a) of the bearing (5). In this case, the projection (19) of the guide cup (12) engages in a groove-shaped guide (18) of the brake spindle (11) in every operating state of the castor (1).

2. The caster according to claim 1, It is characterized in that The guide cup (12) is made of metal and is riveted to components of the bearing (5) in the assembled state.

3. The caster according to claim 1, It is characterized in that The guide pot (12) is designed as a punched and bent part.

4. The caster according to claim 1, It is characterized in that The inner diameter (d 1 ) is constructed to be larger than the inner diameter (d) of the bearing (5).

5. The caster according to claim 1, It is characterized in that The guide tank (12) is riveted to the inner ring (5a) of the bearing (5).

6. The caster according to claim 1, It is characterized in that The brake spindle (11) surrounds the guide pin (7).

7. The caster according to claim 1, It is characterized in that The end faces (13, 14) of the brake shoe (9) on the one hand and of the brake spindle (11) on the other hand, which face toward one another, are provided with toothing (15, 16).

8. The caster according to claim 1, It is characterized in that The guide pin (7) is positioned inside the guide tube (4) and can be moved in the axial direction via an eccentric (8) arranged in the region of the guide tube (4).

9. The caster according to claim 1, It is characterized in that The casters are bed casters.

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