Roller locks for rollers in printing presses

Abstract

The invention relates to a roller lock for a roller of a printing press, comprising a locking bolt (6) which can be moved along an axis (7) by means of a spring (9) and has a contact surface (8) which bears against a rotary bearing of the roller for securing the roller. The contact surface (8) extends at an acute wedge angle (α) relative to the axis (7).

Description

Technical Field

[0001] The invention relates to a roller lock for a roller of a printing press, comprising a locking bolt having a spring movable along an axis and a contact surface which abuts against a rotary bearing of the roller for fixing the roller. Background Art

[0002] Such a roller lock is described in EP 0 734 857 A2. Summary of the Invention

[0003] The object of the present invention is to provide a further roller lock for rollers of a printing press.

[0004] This object is achieved by a roller lock for a roller of a printing press, comprising a locking bolt which can be moved along an axis by a spring and has a contact surface which rests on a rotary bearing of the roller for fixing the roller, characterized in that the contact surface extends at an acute wedge angle relative to the axis.

[0005] The roller lock of the present invention is simple in structure and is insensitive to dirt. In addition, the roller lock is very stable and robust.

[0006] In one embodiment, the acute wedge angle is at most 5° and the contact surface rests on the rotary bearing with self-locking.

[0007] In another embodiment, a slot is provided which holds the locking bolt in a position in the manner of a bayonet connection against the return action of the spring.

[0008] In another embodiment, the link has a transverse groove and a longitudinal groove, which extends parallel to the axis.

[0009] In another embodiment, the slot is introduced or machined into the locking bolt, and a pin is seated in the base body of the roller lock, which pin engages in the slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Further developments can also be seen from the following description of the exemplary embodiments and the accompanying drawings, in which:

[0011] Figure 1 A first embodiment is shown in a view along viewing direction I;

[0012] Figure 2 The first embodiment is shown in a view along viewing direction II, and;

[0013] Figure 3 A second embodiment is shown.

[0014] exist Figures 1 to 3 In the drawings, the same reference numerals are used for the same elements. DETAILED DESCRIPTION

[0015] Figure 1 and 2 Shown is a roller 1 of a printing press and a roller lock 2 for accommodating the roller 1. The roller 1 has a rotary bearing 4 accommodated in a half-shell 3 of the roller lock 2, which is axially secured by a snap ring bolt 5. The rotary bearing 4 is seated on the roller journal and is a rolling bearing.

[0016] The locking bolt 6 is mounted displaceably along an axis 7 in the roller lock 2. The locking bolt 6 has a contact surface 8 that extends at a wedge angle α relative to the axis 7. This wedge angle α is acute and can be up to 5°. This converts the relatively low force of the spring 9 into a relatively high clamping force on the contact surface 8, ensuring self-locking.

[0017] If the rotary bearing 4 presses against the locking bolt 6 during printing operation, the locking bolt tilts within the hole 15 in which the locking bolt 6 is guided. The section of the locking bolt 6 guided in the hole 15 is cylindrical. The wedge angle α causes the locking bolt 6 to clamp in the hole 15 and thus also ensures that the roller lock 2 remains securely closed even under high operating forces.

[0018] The outer circumference of the rotary bearing 4 rests only at three points: two of these points are formed by radial projections on the half-shell 3, and one point is formed by the contact surface 8. A spring 9 moves the locking bolt 6 along the axis 7, pressing the contact surface 8 against the rotary bearing 4. This causes the contact surface 8 to rest against the outer ring of the rolling bearing. This clamps the rotary bearing 4 between the locking bolt 6 and the half-shell 3, with the opening angle β of the roller lock 2 being less than 180°. By adjusting the locking bolt 6, the opening angle β can be increased to above 180°, allowing the rotary bearing 4 and the roller 1 to be removed from the roller lock 2. The roller lock 2 can be easily opened by moving the locking bolt 6 against the return action of the spring 9.

[0019] The slot 10 and the pin 11 (which slides in the slot 10) form a bayonet connection. The slot 10 is incorporated or machined into the bolt 6, and the pin 11 is seated in the base 12 of the roller lock 2. An alternate arrangement (where the slot is incorporated into the base 12 and the pin 11 is seated in the bolt 6) is also possible, but is less advantageous in terms of manufacturing than the illustrated embodiment. When the pin 11 is seated in the longitudinal slot 13, the longitudinal slot 13 of the slot 10 prevents the bolt 6 from twisting about the axis 7. When the pin 11 engages in the transverse slot 14, movement of the bolt 6 along the axis 7 is blocked by the transverse slot 14 of the slot 10.

[0020] The above description is equally applicable to both embodiments.

[0021] Figure 1 and 2 The embodiment in also has the following features:

[0022] The locking bolt 6 is rotated 180° about the axis 7 from the position shown in the figure into the opposite position, which makes it possible to remove the rotary bearing 4 and the roller 1 from the roller lock 2. In this removal position, the locking bolt 6 is held in such a way that the pin 11 is located in the transverse groove 14 and its side wall is pressed against the pin 11 by the spring 9.

[0023] Figure 3 The embodiment in FIG. 1 is characterized in that the locking bolt 6 does not have a widened head in the region of the contact surface 8 (e.g. Figure 2 Instead of having a tapered head (as in the roller lock 2), the locking bolt 6 does not need to be rotated 180° to remove the rotary bearing 4 from the roller lock 2. The locking bolt 6 is rotated by less than 180° about the axis 7 to fit the transverse groove 14 over the pin 11. The locking bolt 16 is thus held in its position pushed in along the axis 7 toward the spring 9, with the locking being ensured by the return action of the spring 9.

[0024] In both exemplary embodiments, the locking bolt 6 can have a plug profile for inserting or plugging in a tool (eg, an Allen key), with which the locking bolt 6 is rotated about the axis 7 .

[0025] Reference Signs

[0026] 1 roller

[0027] 2 roller locks

[0028] 3 half shells

[0029] 4 Rotary bearings

[0030] 5 Snap ring bolt

[0031] 6 Lock bolt

[0032] 7 axis

[0033] 8 Contact surface

[0034] 9 Spring

[0035] 10 chutes

[0036] 11 Pins

[0037] 12 Matrix

[0038] 13 vertical slots

[0039] 14 horizontal grooves

[0040] 15 holes

[0041] α Wedge angle

[0042] β Opening angle.

Claims

1. A roller lock for a roller (1) of a printing press, comprising a locking bolt (6) which can be moved along an axis (7) by a spring (9) and has a contact surface (8) which bears against a rotary bearing (4) of the roller (1) to fix the roller (1), characterized in that The contact surface (8) extends at an acute wedge angle (α) relative to the axis (7).

2. The roller lock according to claim 1, characterized in that: The acute wedge angle (α) is at most 5° and the contact surface (8) rests on the rotary bearing (4) in a self-locking manner.

3. The roller lock according to claim 1 or 2, characterized in that: A slot (10) is provided which holds the locking bolt (6) in a position in the manner of a bayonet connection against the return action of the spring (9).

4. The roller lock according to claim 3, characterized in that: The sliding groove (10) has a transverse groove (14) and a longitudinal groove (13), and the longitudinal groove extends parallel to the axis (7).

5. The roller lock according to claim 3 or 4, characterized in that: The sliding groove (10) is provided in the locking bolt (6) and a pin (11) is seated in the base body (12) of the roller lock (2), which pin engages in the sliding groove (10).

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