Suction head device of page feeder

Abstract

The invention relates to a tip device of a sheet feeder, comprising a probe foot (3) which can be lifted from the surface of a stack of sheets in a periodic manner by a drive. The driver is an electromagnetic linear driver (2).

Description

Technical Field

[0001] The invention relates to a suction head device of a sheet feeder, which comprises a feeler foot which can be lifted from the surface of a sheet stack in a cyclic manner by a drive. Background Art

[0002] DE 22 20 353 C2 describes a suction head device in which a feeler foot is pivoted under a sheet lifted by a separate suction device. Summary of the invention

[0003] The object of the present invention is to provide another suction head device.

[0004] This object is achieved by a suction head device of a sheet feeder, which comprises a feeler foot which can be lifted from the surface of a sheet stack in a cyclic manner by a drive, characterized in that the drive is an electromagnetic linear drive.

[0005] An advantage is that the linear drive saves space, so that there is sufficient installation space in the suction head device for components with other functions.

[0006] The following improvements are possible:

[0007] The electromagnetic linear drive can be a common drive for the lifting suction device (separating suction device) and the probe foot.

[0008] The probe foot can be connected to the electromagnetic linear drive via a transmission mechanism, in particular a coupling transmission mechanism.

[0009] The suction head device can have a lifting suction device, which is driven by another drive.

[0010] Another drive may be an electromagnetic linear drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Further developments of the invention can be gathered from the following description of preferred exemplary embodiments and from the associated drawings.

[0012] It shows:

[0013] Figure 1 : A first embodiment with a common linear drive for the lifting suction device and the probe foot, and

[0014] Figure 2 : A second embodiment with different linear drives for the lifting suction device and the probe foot. DETAILED DESCRIPTION

[0015] In accordance with Figure 1 and Figure 2 In the two embodiments, the suction head device includes a lifting suction device 1 for lifting the sheets from the feed stack one by one, and the suction head device is arranged above the feed stack. The vertical up and down movement of the lifting suction device 1 is driven by an electromagnetic linear drive 2, which has a stator 2a and an actuator 2b. The lifting suction device 1 is connected to the actuator 2b. The suction head device also includes a feeler foot 3, which moves in a rhythm of the sheet conveying. Swing away from the feed stack and swing back again. When the lift suction machine 1 approaches the feed stack, the feeler foot 3 releases the top sheet of the feed stack by lifting the feeler foot 3 from the top sheet. As soon as the lift suction machine 1 has lifted the top sheet, the feeler foot 3 swings under the lifted sheet and presses onto the surface of the next top sheet of the feed stack. The swinging of the feeler foot 3 takes place around the hinge 4.

[0016] Figure 1 An embodiment is shown, in which the movement of the probe foot 3 is driven by the linear drive 2 of the lifting suction device 1 via a coupling transmission mechanism 5. The coupling transmission mechanism 5 comprises a rocker 6, which is connected to the linear drive 2 (or its actuator 2b) via a first connecting rod 7 and is connected to the joint 4 via a second connecting rod 8. When the linear drive 2 swings the rocker 6, the joint 4 moves along the linear guide 9. The probe foot 3 is connected to the second connecting rod 8 via the joint 4 in a swingable manner relative to the second connecting rod 8. The probe foot 3 is connected to a curve roller 11 via a rod 10, which runs in a curve track 12. The connection between the rod 10 and the probe foot 3 is rigid, so that the latter cannot move relative to the former. When the joint 4 moves along the linear guide 9, the curve transmission mechanism 13 formed by the curve roller 11 and the curve track 12 swings the rod 10 and thus the probe foot 3 about the joint 4.

[0017] Figure 2 An embodiment is shown, in which, in addition to the linear drive 2 of the lifting suction device 1, a separate electromagnetic linear drive 14 is provided for the probe foot 3. The linear drive 14 comprises a stator 14a and an actuator 14b. The hinge 4 is fixed to the actuator 14b, and the curve transmission mechanism 13 swings the probe foot 3 around the hinge 4. The structure of the curve transmission mechanism 13 and its connection with the probe foot 3 via the rod 10 are the same as in the first embodiment. When the actuator 14b moves downward or upward with the hinge 4, the curve roller 11 runs along the curve track 12 accordingly. This realizes the swinging movement of the probe foot 3 away from the feed stack and swinging back to the feed stack after the linear drive 14 changes direction.

[0018] Reference numerals list

[0019] 1 Lifting suction device

[0020] 2 Linear drives

[0021] 2a stator

[0022] 2b Actuator

[0023] 3 Probe feet

[0024] 4 hinge

[0025] 5. Coupling transmission mechanism

[0026] 6 Swing rod (Wippe)

[0027] 7First connecting rod

[0028] 8 Second connecting rod

[0029] 9Linear guide

[0030] 10 strokes

[0031] 11 Curve roller

[0032] 12Curve Track

[0033] 13. Curve transmission mechanism

[0034] 14 Linear drives

[0035] 14a Stator

[0036] 14b Actuator

Claims

1. A suction head device for a sheet feeder, comprising a feeler foot (3) which can be lifted from the surface of a sheet stack in a cyclic manner by a drive, It is characterized in that The drive is an electromagnetic linear drive (2).

2. The device according to claim 1, It is characterized in that The electromagnetic linear drive (2) is a common drive for the lifting suction device (1) and the probe foot (3).

3. The device according to claim 2, It is characterized in that The probe foot (3) is connected to the electromagnetic linear drive (2) via a coupling transmission mechanism (5).

4. The device according to claim 1, It is characterized in that The suction head device comprises a lifting suction device (1), which is driven by another drive.

5. The device according to claim 4, It is characterized in that The other drive is an electromagnetic linear drive (14).

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