DE1786055C3 - Device for adjusting character wheel pressure works - Google Patents

Description

35

The subject of patent 15 61 345.3 is a device for adjusting type wheel printing works, especially for the automatic adjustment of type wheels, e.g. B. for the time imprint on ticket validation devices, Consists of hollow shafts that are inserted into one another, with adjusting disks on one end and type wheels on the other end wear, with at least one of the adjusting disks driven by a clockwork via a stepping mechanism is and engages by means of a driver arranged on the circumference of the adjusting disk in a pinion which The pinion engages in a toothed wheel 7 arranged adjacent to the adjusting disk and the toothed wheel in a releasable manner Connection with a second, manually adjustable adjusting disc is. The impulses of the stepping mechanism are preferably placed on a lifting magnet. The plunger of the solenoid shoots forwards and turns the minute disc one position further.

The forward speed of the solenoid plunger takes place jerkily, which in turn has a detrimental effect on the function the adjustment unit assembled from precision parts. By the bump that comes with everyone Adjustment must be absorbed by the device. the individual parts succumb to a greater extent Signs of wear and tear. In addition, the adjustment with a lifting magnet is only possible in one direction of rotation possible.

The object of the invention is to change the known device so that a continuous and before especially a smooth process when adjusting the type wheels is guaranteed;

This object is achieved according to the invention in that the adjustment of at least one of the two Setting disks, namely the minute setting disk from a clockwork via a controllable motor and appropriately attached pinions and gears is done, with the motor shaft, with one of the pinions or gears or with the minute disk a cam disk is connected to the circumference with Recesses is provided into which the lever arm of a microswitch engages during the adjustment process.

The motor is stopped by snapping the microswitch into predetermined locking points. This ensures that the type wheel remains in the new position

In a further embodiment, the locking points are for the lever arm of a microswitch in the form of recesses or holes on the side of one of the Pinions or adjusting disks attached.

An embodiment of the devices according to the invention for the adjustment, in particular the Time imprint is explained using a drawing. It shows

Fig. Ϊ a partially shown combination a minute wheel with an hour wheel for a type wheel printing mechanism, the adjustment of a Engine off,

F i g. Figure 2 shows an embodiment of the latching device for the microswitch.

The Stclheibe 1 shown in Fig. 1 for the Minute setting is mounted on a hollow shaft 2 and is driven by a motor 3 via the pinions 4, 5 and Gears 6, 7 driven. The connection with the attached independently of another hollow shaft 8 Setting disc 9 for setting the hours, the two hollow shafts 2, 8 being inserted into one another Manufactured via the driver 10 and the pinion U, which is detachably connected to the adjusting disk 2 Gear 12 engages. The driver sits on the circumference of the adjusting disk 1 and reaches for a full one Revolution of the minute wheel 1 in the pinion 11. so that The hour wheel 9 is rotated further by one position via the gear wheel 12.

On the ends of the shafts 2, 8 type wheels for the time imprint for a printing unit are common with other type wheels, e.g. B. united for the zone adjustment.

According to the embodiment according to FIG. 1, a cam disk 13 is also attached. She is firm connected to the gearwheel 6 and provided with recesses 14 on its circumference. In these recesses 14 the lever arm 15 of a microswitch 16 engages. If the motor is now switched on by the clockwork, so the pinion 6 rotates and thus also the cam disk 13 connected to the pinion 6. The lever arm 15 is lifted out of its locking position and slides along the circumference of the cam disk 13 until it engages in the next recess 14. At the same moment the microswitch switches off the motor and the adjusting disc remains in its new position.

The advantages achieved with the invention are in particular that the adjustment of the time ^ ufdrukkes takes place continuously. In addition, the time setting can be corrected in both directions of rotation easily perform.

1 sheet of drawings

Claims (2)

Patent claims: 1. Device for adjusting type wheel printing units, especially for the automatic s adjustment of type wheels, z. B. for the time stamp in the case of ticket validation devices, consisting of hollow shafts inserted into one another, which on one end of SteSlscheibe, and on its other end type wheels, with at least one of the adjusting disks is driven by a clockwork via a stepping mechanism and by means of a The driver arranged on the control disk circumference engages in a pinion, the pinion in a, the Adjusting disk adjacent gear (7) engages and the gear is releasably connected with a second a manually adjustable adjusting disk, according to patent 15 61 3453, characterized in that that the adjustment of at least one of the two adjusting discs (2, 8), namely the Minute setting disc (1) from a clockwork via a controllable motor (3) and accordingly built-in pinion (4,5) and gears (6, 7) takes place, the motor shaft with one of the pinions and with the minute setting disk a cam disk (13) is connected, which is provided on its circumference with recesses (14) into which the adjustment process Lever arm (15) of a microswitch (16) engages. 2. Device according to claim 1, characterized in that the latching position for the lever arm (15) of the microswitch (16) in the form of recesses or bores on the side of one of the pinions. Gears or adjusting disks is attached.