DE1499486B2 - ZERO SETTING DEVICE FOR A MECHANICAL ROLLER COUNTER - Google Patents

Description

1 2

The invention relates to a zero direction of a rotatably mounted on the support arm Setting device for a mechanical roller counter, driver is provided during the counting which neighboring number rollers roll over a process on the cam track, Gear reduction gears are connected, which is a particularly low-friction zero position Intermediate gears in the manner of a planetary gear set 5 individual digit rollers in particular therefore possible one in relation to the number roller shaft against borrowed, because this driver in the shock-like Verdie The support arm is supported by the zero setting device, supported by the force of a spring pivotable pin are, wherein a the pin and the planetary gear set against the biasing force of the spring of the curve-guiding support arm can be lifted to the gradual value transfer path. This driver should go ahead the digits assigned to the higher value place preferably at least during the majority of the roll from one to the next lower value zeroing movement from the cam track place associated digit roller attached cams remain lifted.

is pivoted in such a way that the stepper drive to ensure reliable separation

by relaxing the spring when swiveling back the individual numeric rollers, the drive gear becomes

of the support arm takes place in the step of the cam, and 15 by the zeroing device to separate from

in which, before the zeroing process, each of the number rollers axially on the number roller shaft

Number rolls of the next higher value places of shifted and then abruptly over one

their drive gears are separated. twisted small angular range.

In a known zero setting device for a device, in order to ensure reliable mechanical operation Roller counter (USA.-Patent 20 in terms of operation is a particularly advantageous construction 3 069 083) is used to reset the individual configuration of the device according to the invention Numerical rollers a driver by a spring, characterized in that the drive gear pushed a spiral cam, so that as a constant over the planetary gear set with a gear The result of the spiral profiling of the curves is connected, which is coaxial on the number roller shaft track in connection with the force of this spring, 25 arranged to this and rotatably connected to the cam which pushes the driver against this cam track on the digit roller of the next lower value place, a torque component to zero-bond, and that the drive gear is an opposing position the individual digit rolls caused interlocking, which with a complementary relationship, serration in the inner area of the digit roller of the next

In this known zero setting device, it is 30 higher value digit can be brought into engagement, on-

particularly disadvantageous that as a result of the relatively large points.

Frictional resistance between the driver and In a modified embodiment of the

of the cam surface of the associated cam, a drive gear are on that of the drive gear

large zero setting force on the driver and thus laterally opposite inner area of the numeric

a considerable load on the cam surface 35 roll coaxially to the number roller shaft several openings

must be exercised. Provided by this relatively high gene, the mating teeth then

Load is the wear of the entire counting accordingly as a ratchet wheel with an axial of

device increases, making its outer side surface protruding and into a lifetime

is shortened significantly. these openings engaging pin is formed.

In addition, in this known type of 40 To initiate the actuation of the invention zero position the increased risk that the numerical zeroing device is also unrolled with only slightly weakened zero spring speaking control device provided, the soicht can be returned to their end position probably in the form of a magnetic coil as well as manually can, in which case the counting process can also be operated again, be designed as a simple lever arm in the case of a 45 different from the initial situation.

The position of the number rollers begins so that the. In the case of manual actuation, the

there is an increased risk of false reports. Lever arm advantageously at its actuation

It is therefore the object of the invention to provide a rolling element for the axial displacement of the end Avoidance of the disadvantages of the known zero setting device arranged non-rotatably on a rod for a mechanical roller counter 50 device for the purpose of separating the drive gear to create, in which a reliable zero from the digit role of the higher value place and a position of the individual digit rollers without pressing a switching element biasing scissor spring for a driver on the cam track for the sudden rotation of the drive gear The cam used is incremented. its axial displacement.

This task is in the case of zero setting devices for 55. According to the invention, the actuation of the mechanical roller counters of the initially defining zero setting device for all neighboring ones th type according to the invention solved in that the number rollers simultaneously on the central control zeroing process by means of a zero setting device (magnetic coil or lever arm), is directed, which the support arm against the pre-tensioning An embodiment of the invention is post-tensioning and explained in more detail on the basis of the drawings for the additional tension of the spring 60, shifted abruptly and the one next- It shows

The digit role assigned to the lower value place via F i g. 1 a top view of a roller counter with

the planetary gear set against the counting direction - automatically operated zero setting device,

drives, and that the zeroing process by Ent- F i g. 2 shows a section along line 2-2 in FIG. 1

tension the spring when pivoting the support 65 on an enlarged scale,

arms is accomplished. F i g. 3 is an exploded perspective view

If in structurally simple and functional to- representation of the roller counter according to FIG. 1 in

reliable way with the simplified form according to the invention,

F i g. 4 shows a partial section along the line 4-4 in FIG. 2,

F i g. 5 is a partial section along the line 5-5 in FIG. 4;

F i g. 6, 7, 8 show sectional views similar to that according to FIG. 5 with consecutive Reset phases;

F i g. 9 shows a partial view of a roller counter with manual triggering of the zero setting device,

F i g. 10 a perspective illustration of a modified form-fitting coupling between a drive gear and a digit roller.

A mechanical roller counter has according to FIG. 1 a support frame 15 with side legs 16, 17 and transverse struts 18 attached between them and a viewing window 19 arranged on the end face on. Between the side legs 16 and 17, a Ziffemrollewelle 20 is attached, on which coaxially rotating number rollers 22 to 27 side by side, from the number roller 22 with the smallest value place starting up to the number roller 27 with the largest value place increasing, are arranged. On the outer circumference of each number roller there are numbers "0" to "9", each by an angle of rotation of 36 ° offset from one another. A drive motor 30 drives a one that is fixedly connected to the number roller 22 Gear 37 via a drive shaft 32, a reduction gear 33 with an intermediate gear 36 either continuously or gradually. To transfer the counting process to a number roll an adjacent digit roll of the next higher value place is inside each digit roll gear 52 connected to it in a rotationally fixed manner is provided (FIG. 3), which via an indexing device 45, which consists of a support arm 47, a planetary gear set 49, 50, with a drive gear 53 for Drive the digit roller 23 is connected to the next higher value point. Between the side Legs 16, 17 are arranged parallel to the number rollers 22 to 27 extending rods 40, 41, 42. The rod 41 serves for the pivotable mounting of the indexing devices 45 (FIG. 3), while the Rod 42 is provided for one-sided support of springs 63 for a defined preloading of support arm 47 is. Cams 60 are on the inner surfaces of each digit roller facing the gears 52 22 to 27 firmly arranged. A driver 61 rolls on the curved surface of the cam 60, which is on the Support arm 47 is rotatably mounted.

The gradual transfer of value from a number role to a number role with the next higher Value point takes place via the planetary gear set 49, 50, which is rotatably mounted on a pin 56, and at the same time with the support arm 47 and a pivot arm 55, which the planetary gear set with constant Distance around the shaft 20 and on the teeth of the drive gear 53 leads in such a way that the driver 61 with increasing angle of rotation of the number roller with the lower value digit the highest point of the curve of the cam 60 runs up and at the same time the spring 63 over the pivoting Support arm 47 pretensioned.

The planet gear 49 runs on the gear 52 and at the same time the planet gear 50 runs on the drive gear 53 of the number roll of the higher value place against the counting direction. The reduction ratio between the gear 52 and the planet gear 49 and between the planet gear 50 and the drive gear 53 is chosen so that there is one between every two adjacent digit rollers 10: 1 reduction results, so that in each case the digit roller of the higher value place with a full revolution the tenth of a revolution of the number roll of the lower value digit.

As soon as the driver 61 suddenly hits the highest point of the curve of the cam 60 under the action of the pretensioned spring 63 with the

ίο Support arm 47 in the step of the cam 60 on the Curve point, which has the smallest distance from the pin roller shaft 20, is pivoted back the drive gear 53 over the planetary gear set 49, 50 and thus the digit role of higher value place advanced by the prescribed angle of rotation of 36 °.

When counting down, the driver 61 is raised over the step of the cam 60, so that when turning the number roller backwards when changing from position »0« to position »9« there is also a reverse rotation of the adjacent digit roller of the higher value place.

When driving the roller counter in the direction of increasing counting, it must be ensured that during the rotation of a number roller (e.g. number roller 22) from position »0« to position »9« no transmission of the rotary movement via the planetary gear set 49, 50 to the adjacent digit roller higher value place (z. B. number roll 23) takes place, although the driver 61 is from the lowest runs up to the highest point of the curve of the cam 60 and the indexing device 45 with it the planetary gear set 49, 50 is displaced against the bias of the spring 61, and that a transfer of value in a defined step and only at the moment when the support arm 45 is pivoted back The driver 61 engages the step of the cam 60 (FIG. 5). In order to drive the Digit rolls in the direction of increasing counting to avoid a value carry over while moving the number roller (e.g. number roller 22) moved from position "0" to position "9" is the Curved path of the cam 60 spirally profiled so that as a result of the rolling of the Driver 61 on the curved path caused pivoting of the support arm 47, with the Planetary gear set 49, 50 moved around the gear 52, the endeavor of the number roller (e.g. number roller 22), to drive the adjacent digit role of higher value place, is just canceled, so that no Torque is exerted on the digit roller of higher value place.

To reset the individual number wheels 22 to 27, zero setting devices 70 are provided on each number wheel assigned, which are non-rotatably connected to one another via the common rod 40 (Fig. 1 and 3). The individual zero setting devices 70 have fork-like extensions 72, 73, the end sections of which during the counting process, the drive gears 53 connected to the digit rollers laterally limit, but without touching it.

According to FIG. 1 and 2 a solenoid 80 is provided, which initially the Rod 40 against the biasing force of a spring 75

axially displaced and then suddenly twisted. Due to the axial displacement of the rod 40 the one fork-like extension 72 of the zeroing device 70 against the end face of the drive

Claims (9)

5 6 Gear 53 is pressed and pushes it out of the entire rod 40 against the biasing force of the spring of a toothing 67 of the associated digit roller 75 in the direction of the lateral leg 17, so that the connection between the individual The Abwällied86 is supported in Axialnen drive gears 53 and the associated direction to the rod 40 on the surface of a number roller is interrupted. By pulling out the pin 94 until the drive gears push the drive gear 53 out of the teeth 67, 53, 53 α separated from the respective numeric rollers, the teeth 67 will be integral with the gear. During this axial displacement, the connected counter-toothing 65 spans freely, into which the pawl 92 latches the scissor spring 95 and rotates in the fork-like extension 72 during its abrupt rotational moment of sliding of the rolling element 86 from the movement through the rod 40 and the pin 94 on a pin shoulder 97 with a smaller total drive gear 53 with the counter-toothing diameter the zero setting device 70, 70 α through 65 by a small angular path against which the always constant biasing force of the scissors rotation of the counting process turns back. spring 95 abruptly to the limit of its angular Since with this sudden rotation of the approach through the pin shoulder 97. After the end of the Drive gear 53 each digit roller 22 to 27 only 15 zeroing process are the zeroing devices borrowed via the gear 52 and the planetary gear set 70, 70 α via the common rod 40 from one 49, 50 is connected to the drive gear 53, spring 76, which is fixed against rotation with the rod the planetary gear set 49, 50 runs through the sudden 40 connected extended section 78 engages, Angular acceleration according to FIG. 6 notched on the bevel. drive gear 53 back, with the number rollers 20 thus also the zero position of the number roller 22 is guaranteed because of their comparatively great inertia in their lowest position Momentary position stop so that the co-simultaneous with the axial movement of the rod 40 slave 61 lifted from the cam 60, the intermediate wheel 36 is separated from the gear wheel 37, and the springs 63 via the deflection of the support- According to FIG. 9 is electromagnetic in place of the arms 47 additionally tensioned against their bias 25 actuated lever arm 85 according to FIG. 2 on manually can be. Since the drive gear 53 is provided according to operable lever arm 100, which one F i g. 7 remains held, only the print head 104 and a return spring 105 rotates Force of the spring 63 the number roller against its actuating leg 101, which by a Counting direction back until the driver 61 at the steep slot 102 extends out of a support frame 15 α , flank of the curved path of the cam 60 strikes 30. According to FIG. 9 left leg 107 of the (Fig. 7). Lever arm 100 is rotatably mounted on rod 42 to prevent undesirable friction losses switch on, the during the zeroing process and is of a scissors spring 111 with a Curved path of the cam 60 from the driver 61 further switching element 110 is resilient in the radial direction not touched. tied together. According to FIG. 9 right leg of the After the zeroing process according to FIG. 8- 35 lever arm 100 lies on the rolling member 86 α which ends, the fork-like extension 73 of the zero setting device 70 α , which is actuated via a spring adjusting device 70 by a reverse rotation of 112 in the position shown in FIG. 9 notched position rod 40 can be notched. will hold. When manually deflecting the At the according to FIG. 4 left outer surface of the lever arm 100, the Abwälglied first slides in the number roller 27, a gear 53 α is arranged, 40 in the axial direction on the pin 94, so that when suddenly the drive gear 53 functionally slips on the pin lug 97 from between the number rollers 22 to 27, depending on - Switching element 110, which via the scissor spring but without an indexing function. Was biased on this gear 111 to pivot suddenly. 53 α , a counter-toothing 65 α is arranged, in accordance with F i g. 10 is instead of the counter-toothing which is used for the zero position of the number roller 27 according to 45 65 according to FIGS. 1 to 8 one of a ratchet F i g. 2 a zero setting device 70 a, which is provided on the wheel 115, a radially protruding pin 118, is attached to a rod 40, with its fork-like extension which suddenly latches into openings 120 on the inner surface of a 72 α . In this case, a Fort- digit roller 116 intervenes during the counting process switching device 45 α with its support arm 47 α and analogous to the above-described Schaltden planetary gear sets 49 a, 50 a, the pivot arm 50 processes via the zeroing device 70 with its 55 a, a driver 61 a , which are disengaged on a fork-like projections 72, 73 and cam 60 α runs, can be pivoted analogously to the zero setting device,
actuated according to FIGS. The solenoid 80 rotates a switching pin. 82 when they are excited according to FIG. 2 to the left and 55 pivoted a lever arm 85 around the rod 1. Zeroing device for a mechanical 42, so that at the end of the lever arm 85 its roller counter, in which adjacent digit pivoting movement on the zeroing device 70 α roll, can be transmitted via a gear reduction gear. are bound, the intermediate gears of which are in Art So when zeroing the number rollers the axial 60 of a planetary gear set on one with respect to Displacement of the zero setting device 70 in time before the number roller shaft against the force of a spring their radial deflection takes place, according to FIG. 1 pivotable pins are mounted, with a and 2 in the area of the rod 42 parallel to the lever, the pin and the planetary gear set leading arm 85 a pawl 92 arranged, which from the support arm to the gradual transfer of value to the a scissor spring 95 elastic in the radial direction at 65 digits assigned to the higher value place the lever arm 85 is pressed on. According to FIG. 1 roll from one to the next lower When the lever arm 85 is actuated, a digit roller assigned to a value point is initially attached Moving member 86 is axially displaced so that the cam is pivoted in such a way that the step drive by releasing the spring when swiveling the support arm back into the step of the cam takes place, and in which, before the zeroing process, the number rolls of the next higher value places are separated from their drive gears, characterized in that the zeroing process is initiated by a zeroing device (70) that supports the support arm (47) shifted abruptly against the bias and the additional tension of the spring (63) and the digit role assigned to the next lower value place over the planetary gear set (49, 50) drives against the counting direction, and that the zeroing process by relaxing the spring (63) is completed when the support arm (47) is pivoted back. 2. Zeroing device according to claim 1, characterized in that one on the support arm (47) rotatably mounted driver (61) is provided, which during the counting process on the Curve of the cam (60) rolls and when the jerky displacement of the support arm by the The zero setting device (70) can be lifted off the cam track against the biasing force of the spring (63). 3. zero setting device according to claim 1 or 2, characterized in that the drive gear (53) through the zero setting device (70) to separate from the number rollers (22 to 27) axially on the number roller shaft (20) and can then be rotated abruptly over a small angular range. 4. zero setting device according to claim 3, characterized in that the drive gear (53) is constantly connected to a gear (52) via the planetary gear set (49, 50), which is on the number roller shaft (20) arranged coaxially to this and rotatably fixed to the cam (60) of the Digit roller of the next lower value place is connected, and that the drive gear (53) a counter toothing (65), which with a complementary toothing (67) in the interior the digit roller of the next higher value place can be brought into engagement. 5. zero setting device according to claim 4, characterized in that on which the drive gear (53) laterally opposite inner area of the number roller (116) coaxially to the number roller shaft (20) several openings (120) are provided and that the counter-toothing (65) as a ratchet wheel (115) with an axially protruding from its outer side surface and in a this opening (120) engaging pin (118) is formed. 6. Zero setting device according to one of the preceding claims, characterized in that that the driver (61) at least during the major part of the return movement of the Cam track of the cam (60) remains lifted. 7. Zeroing device according to one of the preceding claims, characterized in that that to initiate the actuation of the zero setting device (70) a control device (magnetic coil 80 or lever arm 100) is provided. 8. Zeroing device according to claim 7, characterized in that the lever arm (100) at its actuating end has a rolling element (86 a) for the axial displacement of the zero-setting device (70) arranged non-rotatably on a rod (40) for the purpose of separating the drive gear (53) from the Has a digit roller (23) of the higher value place and a scissor spring (111) prestressing a switching element (110) for abrupt rotation of the drive gear (53) after its axial displacement. 9. zero setting device according to claim 7, characterized in that the actuation of the Zeroing device (70) for all adjacent digit rollers (22 to 27) simultaneously over the central control device (solenoid 80 or lever arm 100) is provided. For this purpose 2 sheets of drawings 109 552/191