RU2598573C1 - Device for dough rolling and dough ribbon production from dough (versions) - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: device contains a frame whereon an upper and a lower pairs of rollers are installed. Each rollers pair has an own drive for this pair rollers rotation in opposite directions. A pendulum with a projection and a supporting caster is installed on the frame between the upper and the lower pairs of rollers by means of an axle. A dough ribbon position sensor triggering in case of the ribbon tension is attached to the frame on one side of the pendulum. A ribbon position sensor triggering in case of the dough ribbon sagging and deviation from the preset position is attached to the frame on the other side of the pendulum. The pendulum projection is located so that to enable interaction with the sensors. An adjustable gap is formed between each pair of the rollers. The lower pair of rollers is shifted to one side relative to the upper pair of rollers. Each dough ribbon position sensor is connected to the device operation control unit connected to the drive for rotation of the upper pair of rollers. According to another version, the device is equipped with a dough ribbon position sensor located under the pendulum so that to enable interaction with the pendulum projection in case of the dough ribbon sagging and its maximum deviation from the preset position. According to the third version, the device is equipped with a dough ribbon position sensor located under the pendulum so that to enable interaction with the pendulum projection in case of maximum allowable tension of the dough ribbon and its deviation from the preset position as well as with a counterweight attached on the pendulum.

EFFECT: invention allows to enhance the device reliability and dough ribbon production quality, approximate the rolling process to the traditional manual process where the rolling quality, the ribbon strength, homogeneity and elasticity are achieved.

3 cl, 6 dwg

Description

The device relates to the food industry, mainly to means for the manufacture of food products with a filling in a test shell.

In the manufacture of such food products with automatic machines having great productivity, the strength of the product test shell, which is molded from the test tape, is essential. Accordingly, the strength of the shell depends on the strength of the test tape, which in turn depends on the proportion of water and binder components in the test, on the grade of flour, viscosity, specific gravity and other indicators. Moreover, the test tape made from dough should meet two conditions - it should not be brittle (conditionally dry), on the one hand, and it should not be sticky (conditionally wet), on the other hand. These conditions are superimposed on many other conditions that affect the strength of the test tape, working at break during its manufacture and molding of the product. One of the main such conditions is the pressure and temperature to which the dough and dough tape are subjected. Such difficult working conditions of the test tape determine the basic design parameters of devices designed for high-quality rolling of the dough and getting the test tape out of it, and, based on the described problem, especially high demands are placed on the rolling devices for the reliability of their work.

From the achieved world level, there are known devices for rolling out the dough and making dough from it, each of which contains a frame on which upper rollers, lower rollers or groups of rollers are installed (EP 0179645 A, 04/30/1986; EP 0170436 A, 02/05/1986; EP 0309005 A, 03/29/1989; EP 1203533 A, 05/08/2002; EP 0329398 A, 08/23/1989; EP 2384628 A1, 11/09/2011; EP 2348869 A2, 08/03/2011; WO 2010046451 A2, 2904.2010; US 2011311698 A1, 12/22/2011; CN 201718373, 01/26/2011; CN 2023110310, 07/11/2012; UA 2010238572 A1, 06/23/2011).

Japanese applications JP 6292497 A, 10.24.1994 and JP 2011062149 A, 03/31/2011 and other applications, apparatus for the manufacture of food products, such as noodles and other products, the apparatus contains devices for rolling out the dough and obtain from it a test tape.

Also known are devices for rolling dough and making dough from it, each of which contains a frame on which rollers are mounted having a drive for rotating them (RU 2262850 C2, 04.20.2005; RU 2281651 C2, 08.20.2006; RU 2007134434 A, 27.03 .2009; RU 96117917 A, 02.10.1999; RU 2241334 C2, 12/10/2004; RU 2021723 C1, 10/30/1994; RU 2004119396 A, 01/10/2006; RU 2002128347 A, 12/10/2004; RU 2020824 C1, 10/15/1994 )

Of the known devices, the closest device to the device presented in this description is a device for rolling out the dough and obtaining a test tape from it, comprising a frame on which an upper pair of rollers having a drive to rotate them in opposite directions, as well as a lower pair of rollers, which has the other drive their rotation in opposite directions, the rollers form pairs, while the corresponding gaps are formed between the rollers of each pair, the device is equipped with a sensor unit for tracking the angle of rotation azhdogo lower roller from a point where the outside part of the dough contact with the surface of the roller to a preset point, and the device has a controller controlling the rotational speed of the upper rollers, which is connected to the sensor unit (RU 2020824 C1, 10/15/1994). By changing the rotation angle of each lower roller, the amount of dough supplied from the lower rollers is changed, and the controller increases or decreases the rotation speed of the upper rollers when the signal from the sensors indicates a smaller angle than the specified range of angles. In a known close device having essentially two-stage rolling of the dough with two pairs of rollers, the productivity of the lower pair of rollers is not regulated, and a slight increased productivity of the first pair of rollers relative to subsequent pairs of rollers leads to the accumulation of dough between the lower pair of rollers. This leads to grinding of the dough under pressure, its overheating and extrusion.

In the case of increasing the productivity of the device, there is a significant problem of the stability of movement of the test tape through the device. Many factors influence this movement: uniformity and speed of the tape, its specific gravity, tensile strength of the test, thickness of the test tape, quality of the test mixture from which the tape is made, humidity and ambient temperature, and other factors. All these factors affect the reliable movement of the test tape in the device, the reliability of the device and the quality of the test tape. In cases where the device does not meet any of these factors, the reliability of the device and, as a result, the quality of rolling the dough and the quality of the test tape from the test are reduced.

The technical result of the device options presented in this description is to increase the reliability of the device and the quality of the test tape.

The indicated technical result was obtained by a device for rolling dough and obtaining a test tape from it, containing a frame on which an upper pair of rollers having a drive for their rotation in opposite directions, as well as a lower pair of rollers having a different drive for their rotation in opposite directions, between each a pair of rollers formed an adjustable gap, and the device is equipped with a control unit electrically connected to the position sensors of the test tape and the rotation drive of the upper pair of rollers, characterized in that about between the upper and lower pairs of rollers on the frame by means of an axis a pendulum is mounted with a supporting roller mounted on it, which is located with the possibility of contact with the test tape when it is moving and deviating from a predetermined position, while the adjustable pendulum rotation limiter in the vertical plane is also fixed on the frame located on one side of the pendulum, the first sensor permissible degree of tension of the test tape and located on the frame on the other side of the pendulum, the second sensor deviation of the test l The entrances from the given position, when it is allowed to sag, a protrusion is mounted on the pendulum, located to interact with these sensors, the sensors and the protrusion are located on an arc of a circle, the center of which is aligned with the center of the axis on which the pendulum is mounted, the lower pair of rollers is shifted to one side relative to the upper pair of rollers, between the upper pair and the lower pair of rollers a space is formed in which the pendulum is located.

The indicated technical result was obtained by a device for rolling dough and obtaining a test tape from it, containing a frame on which an upper pair of rollers having a drive for their rotation in opposite directions, as well as a lower pair of rollers having a different drive for their rotation in opposite directions, between each a pair of rollers formed an adjustable gap, and the device is equipped with a control unit electrically connected to the position sensor of the test tape and the rotation drive of the upper pair of rollers, characterized in that between the upper and lower pairs of rollers, a pendulum is fixed on the frame via an axis with a supporting roller mounted on it, which is located with the possibility of contact with the test tape when it is moving and deviating from a predetermined position, an adjustable vertical pendulum limiter is also fixed on the frame, a position sensor the test tape is located under the pendulum and serves to control the permissible sagging of the test tape to its maximum deviation from the specified position, the protrusion is fixed to the pendulum p located with the possibility of interacting with the position sensor of the test tape, the sensor and the protrusion are located on an arc of a circle whose center is aligned with the center of the axis on which the pendulum is mounted, the lower pair of rollers is shifted to one side relative to the upper pair of rollers, between the upper pair and the lower a pair of rollers formed the space in which the pendulum is located.

The indicated technical result was obtained by a device for rolling dough and obtaining a test tape from it, containing a frame on which an upper pair of rollers having a drive for their rotation in opposite directions, as well as a lower pair of rollers having a different drive for their rotation in opposite directions, between each a pair of rollers formed an adjustable gap, and the device is equipped with a control unit electrically connected to the position sensor of the test tape and the rotation drive of the upper pair of rollers, characterized in that between the upper and lower pairs of rollers on the frame, the pendulum is fixed via an axis with a counterweight mounted on it, holding the pendulum in the upper position, the pendulum is located with the possibility of contact with the test tape when it is moving and deviating from the set position, while an adjustable rotation limiter is also fixed on the frame a pendulum in a vertical plane located above the pendulum on one side of the sensor position sensor test tape to control the allowable tension of the tape to its maximum deviation from the rear In this position, a protrusion is mounted on the pendulum, which is able to interact with the position sensor of the test tape, the sensor and the protrusion are located on an arc of a circle whose center is aligned with the center of the axis on which the pendulum is mounted, the lower pair of rollers is shifted to one side relative to the upper pair of rollers , between the upper pair and the lower pair of rollers, a space is formed in which the pendulum is located.

Figure 1 shows a device for rolling out the dough and receiving from it a test tape in front view with two sensors for tension and sagging of the test tape;

figure 2 - device in side view along arrow A in figure 1 with the connection diagram of the control unit with the drives of the device and sensors;

figure 3 is a second variant of the device;

figure 4 - the device along arrow B in figure 3 with the connection diagram of the control unit with the drives of the device and the sensor sagging of the test tape;

figure 5 shows a third variant of the device with one sensor for the tension of the test tape;

in Fig.6 shows the device in a side view along arrow B in Fig.5 with the connection diagram of the control unit with the drive of the device and the tension sensor of the test tape.

The sequence of device options is indicated conditionally.

The first version of the device for rolling dough (Fig. 1) contains a frame 1 on which an upper pair of rollers 2 and 3 (rolls) is installed, as well as a lower pair of rollers 4 and 5, located under the upper pair of rollers. The pairs of rollers are offset relative to each other in the horizontal direction by a distance L. The pairs of rollers are spaced vertically from each other at a distance L1. Each specified pair of rollers has corresponding drives 6 and 7 (Fig.2) of rotation of the rollers. The drives are connected to the drive shafts 8 (Fig. 1), transmitting rotation to the driven shafts 9 through gear drives (not shown in the drawings). As a result of this, each said pair of rollers rotates towards each other. Each pair of rollers can have its own frame, while the frame of the rollers can be connected by a common frame 1 as shown in Fig.4. On the frame 1, between the upper and lower pairs of rollers, by means of an axis 10 fixed on the frame, a pendulum 11 is installed with a supporting roller 12 mounted on it, which serves to track the position of the test tape and to stabilize its working position, which prevents tearing of the tape and its chewing by the lower pair of rollers 4 and 5. The pendulum 11 is made in the form of a frame with sides 13 restricting the movement of the test tape in its transverse direction. On the pendulum in its lower part, a protrusion 14 is mounted, located with the possibility of interaction with the sensors 15 and 16 of the position of the test tape, tracking the stable working position of the test tape during its movement in the device. Each of the sensors and the protrusion 14 are located on an arc 17 of a circle, the center of which is aligned with the center of the axis 10, on which the pendulum 11 is mounted, and the center of rotation of the pendulum. When the device is operating, the pendulum 11 swings in an arc 17 clockwise and vice versa within a given amplitude limited by sensors 15 and 16.

The initial position of the pendulum on the axis 10 is set by the screw limiter 18 of rotation of the pendulum, and in the initial position, the protrusion 14 of the pendulum is opposite the sensor 16 in the interaction position. The limiter 18 is designed for the design installation of the pendulum 11 in its original operating position. The first sensor 15 of the tension of the test tape is mounted on the frame near the pendulum, in the upper position relative to the pendulum 11. The sensor 15 is an element that fixes the position of the test tape when it has the maximum allowable tension.

The second sensor 16 of the position of the test tape is mounted on the device frame in the lower position relative to the sensor 15. The sensor 16 is an element that fixes the position of the test tape when it has the maximum allowable sag. Dotted line 19 in figure 1 shows the position of the test tape 21 at its maximum allowable sag, which the test tape may take during the operation of the device. In connection with the foregoing, hereinafter, sensor 15 is referred to as a test tape tension sensor, and sensor 16 is referred to as a test tape sag sensor.

An adjustable clearance f is formed between the upper pair of rollers 2 and 3. An adjustable clearance fl is formed between the lower pair of rollers 4 and 5. The adjustment of these gaps is carried out by the regulators 20 of the movement of the respective rollers by shifting the rotation axes of the driven shafts 9 relative to the drive shafts 8. The regulators 20 reduce or increase the gaps f and f1.

Figure 1 conditionally shows the average working, most optimal, position of the test tape 21, the dashed line 22 shows the extreme position of the test tape 21 in the case of its maximum allowable tension, which it can take during the operation of the device. The strip 23 in figure 1 conventionally shows an array of dough, made, for example, in the form of a roll supplied to the device.

The lower pair of rollers 4 and 5 is shifted horizontally laterally from the upper rollers so that there is the mentioned distance L between the lower pair of rollers and the upper pair of rollers so that in the initial position the pendulum 11 ensures that the test tape 21 enters the gap between the roller 12 the pendulum and the axis 10 and so that the test tape when it is supported on the roller 12 is stretched within the specified working tension limits.

Each sensor 15 and 16 is electrically connected to the unit 24 for controlling the operation of the device (Fig. 2), which is electrically connected to the rotation drives 6 and 7 of each pair of rollers. The control unit 24 contains speed control elements of at least one of the shafts of the drives 6 and 7, which does not preclude the control unit from adjusting the speed of rotation of the shafts of both drives. The drive 6 of the lower rollers 4 and 5 may not have an adjustment of the rotational speed of these rollers from the control unit. In this case, the frequency of rotation of the rollers 4 and 5 is set constant, corresponding to a given performance of the device. In this case, the control unit 24 controls only the rotational speed of the drive shaft 7 and, accordingly, the rotational speed of the upper rollers 2 and 3. Changing the rotational speed of the upper rollers 2 and 3 by the signals received by the control unit from sensors 15 and 16 is carried out in order to obtain high-quality test tape. The signal from the sensor 15 increases the speed of the drive 7 of the upper rollers, and the signal from the sensor 16 reduces the speed of the drive 7 and the speed of rotation of the upper rollers.

The first version of the device takes into account the inertia of the speed control of the upper rollers, which is compensated by the change in the amount of sagging of the test tape between the pairs of rollers within the acceptable range. This ensures the free position of the test tape, in which the test tape, having a constant cross section, is fed into the gap fl between the second pair of rollers 4 and 5. For the test tape 21 to automatically enter the gap fl between the second pair of rollers, it is provided that the width L3 (FIG. 2) each roller of the lower pair of rollers is larger than the width L2 of each roller or 2-10 mm more accurately than the pair of rollers. The electrical connections in the drawings are shown by lines that do not have positions.

The second variant of the device (Figs. 3, 4) contains elements of the first variant of the device, and the second variant of the device contains only one sensor 16 for sagging the test tape, one electrical connection of the sensor 16 with the control unit 24, and one electrical connection of the block 24 with the rotation drive 6 rollers 4 and 5. (Unlike the first embodiment, the second version of the device does not contain a sensor 15 for tensioning the test tape and electric connection between it and the control unit 24.) The sensor 16 for positioning the test tape in the second version of the device is pendulum to interact with its projection 14 in the event of sagging of the test tape and its deviation from a predetermined limit position.

The third version of the device (Fig.5, 6) contains elements of the first variant of the device and the connection between them, and the third version of the device contains only one sensor 15 of the tension of the test tape 21, which tracks the position of the test tape when it passes through the device. The sensor 15 is located above the pendulum 11 with the possibility of interaction with it in the case of the maximum allowable tension of the test tape when it deviates from the specified position. (Unlike the first version of the device, the third version does not have a sensor 16.) In this case, the third version has a counterweight 25 mounted on the pendulum.

The first version of the device operates as follows. The rotation speed of the lower pair of rollers 4 and 5 is set constant by means of a control unit 24 (Fig. 1), which is connected to the drive 6 of the lower pair of rollers. The dough 23 is fed into the gap f between the rollers 2 and 3 of the upper pair of rollers. The dough 23 is captured by the rollers 2 and 3 rotating towards each other, deformed by them and converted into a test tape 21, moving between the sides 13 of the pendulum 11 along its bottom. In the process of passing the test tape between rollers 2 and 3, a preliminary rolling of the test is carried out and its formation to a predetermined thickness s and a given width L2 (Fig. 2), the width L2 of the test tape being equal to the width of each roller of the upper pair of rollers. In the process of operation of the device, the tape 21 (Fig. 1) passes between the pendulum and the supporting roller 12 of the pendulum and is sent to the gap fl between the rollers 4 and 5 of the lower pair of rollers rotating towards each other, which deform the test tape 21. To automatically hit the test tape 21, it is provided in the gap fl between the second pair of rollers that the width L3 of each roller of the lower pair of rollers is 2-10 mm wider than the width L2 of each roller of the upper pair of rollers.

During operation of the device, the test tape 21 sags and takes position 19, while the protrusion 14 moves with the pendulum towards the sensor 16 and interacts with it, which through the control unit 24 slows down the speed of rotation of the rollers 2 and 3 to a level when this speed becomes less than the speed the rotation of the rollers 4 and 5. These rollers move the test tape 21, which, due to the difference in the rotational speeds of the upper and lower pairs of rollers, tends to take position 22, while the test tape is stretched, rests on the supporting roller 12 and rotates pendulum 11 on its axle 10. The pendulum projection 14 interacts with the sensor 15, a tension test tape. The sensor 15 sends a signal to the control unit 24, which issues a command to the drive 7 (Fig. 2) to increase the revolutions of the rollers 2 and 3. Then, during the operation of the device, the sagging of the test tape increases and the above-described cycle of the device is repeated.

The described process is carried out continuously and the test tape during operation of the device smoothly moves from the position of maximum sag to the position of its maximum tension, while maintaining a stable position of the test tape in the device and the specified cross section of the test tape in thickness and width. The device operates in automatic mode. It allows you to perform a consistent rolling of the test with two pairs of rollers 2, 3 and 4, 5 and get at the exit from the device a homogeneous, strong, flexible and dimensionally stable test tape.

The second version of the device works similarly to the previous version, with the only difference being that one sensor 16 for sagging the test tape (Fig. 3) fixes one parameter of the position of the test tape - its maximum allowable sag, which the tape occupies in the position shown by the dashed line 19. In this the position of the test tape, the protrusion 14 interacts with the sensor 16, which sends a signal to the control unit 24 and the unit reduces the number of revolutions of the upper rollers 2 and 3 or stops them at constant revolutions of the lower rollers 4 and 5. As a result Those test tape 21 is pulled, contacts the roller 12, carries the pendulum 11 clockwise and disengages the protrusion 14 with the sensor 16. In this position, the block 24 turns on the drive 7 and increases the speed of the rollers 2 and 3. The test tape 21 takes the position 19 and the cycle repeats.

The described process is carried out continuously and the test tape during operation of the device smoothly moves from its position of maximum sag, shown by the dashed line 19, to the normal adjusted position of the test tape 21.

This embodiment of the device, equipped with a control unit 24 and only one sensor 16 of the position of the test tape when it is sagging, has a simpler design, designed for devices with low productivity of manufacturing the test tape when it moves in the device at low speed. In contrast to the operation of the previous embodiment of the device in the second embodiment of the device shown in FIG. 3, the tension of the test tape 21 is not fixed during operation of the device. It is significant that this variant of the device (with one sensor 16 of the position of the test tape) allows the device to operate without the use of converters and a controller in it.

The third variant of the device works similarly to the first variant, with the only difference being that one sensor 15 of the tension of the test tape 21 (Fig. 5) fixes one parameter of the position of the test tape - its maximum allowable tension at which the tape 21 occupies the position shown by the dashed line 22 Thus, the control unit 24 increases the speed of the drive 7 and the speed of the upper rollers 2 and 3. The speed of movement of the test tape increases and in the space between the first and second pairs of rollers excesses of the test tape 21 are formed. the pressure of the test tape 21 decreases, the test tape begins to sag, lays on the pendulum 11, outweighs the counterweight 25, the pendulum rotates and leads the protrusion 14 out of interaction with the sensor 15. This sensor switches off the drive 7 through block 24 or reduces the speed of the rollers 2 and 3 and the test tape takes position 22. Then the cycle repeats.

The described process is carried out continuously and the test tape during operation of the device smoothly moves from its position of the maximum allowable tension, indicated by dashed line 22, to the normal adjusted position.

This version of the device, equipped with a control unit 24 and only one sensor 15 of the tension of the test tape, also has a simpler design, designed for devices with low production capacity of the test tape when it moves in the device at low speed.

Thus, in contrast to the operation of the first embodiment of the device, in the third embodiment, the sagging of the test tape during the operation of the device is not detected by the sensor. It is significant that this version of the device (with one sensor 15 of the tension of the test tape) provides the ability to operate the device without the use of converters and a controller in it.

All variants of the device provide for the adjustment of the rotation speed of the pair of upper rollers 2 and 3, the productivity of the device and, in combination with other features of the device, eliminate breakage of the test tape, its chewing by the lower pair of rollers and significantly increase the reliability of rolling the dough.

In terms of the quality of the dough rolling, the device options allow bringing the rolling process closer to the traditional manual rolling process of the dough with a rolling pin, when the quality of the rolling, the strength of the tape, its uniformity and elasticity, which are necessary for the production of ravioli, dumplings, pasties, noodles and other types of products, are achieved. In this case, the device variants stabilize the specified operating position of the test tape during its movement through the device. This has improved the reliability of the described device options.

Claims (3)

1. A device for rolling out the dough and obtaining a test tape from it, comprising a frame on which an upper pair of rollers having a drive to rotate them in opposite directions, as well as a lower pair of rollers having a different drive to rotate them in opposite directions, between each pair of rollers an adjustable gap is formed, and the device is equipped with a control unit electrically connected to the position sensors of the test tape and the rotation drive of the upper pair of rollers, characterized in that between the upper and lower pairs of rollers and the pendulum is fixed via an axis to the frame with a supporting roller mounted on it, which is located with the possibility of contact with the test tape when it is moving and deviating from a predetermined position, while the frame also has an adjustable limiter for pendulum rotation in a vertical plane located on one side of the pendulum the first sensor of the permissible degree of tension of the test tape and located on the frame on the other side of the pendulum, the second sensor deviation of the test tape from a given position with its tolerance sagging, a protrusion is mounted on the pendulum, located to interact with the indicated sensors, the sensors and the protrusion are located on an arc of a circle, the center of which is aligned with the center of the axis on which the pendulum is mounted, the lower pair of rollers is shifted to one side relative to the upper pair of rollers, between the upper pair and the lower pair of rollers formed the space in which the pendulum is located. 2. A device for rolling out the dough and obtaining a test tape from it, comprising a frame on which an upper pair of rollers having a drive of their rotation in opposite directions is mounted, as well as a lower pair of rollers having a different drive of their rotation in opposite directions, between each pair of rollers an adjustable gap is formed, and the device is equipped with a control unit electrically connected to the position sensor of the test tape and the rotation drive of the upper pair of rollers, characterized in that between the upper and lower pairs of rollers a pendulum is fixed to the frame by means of an axis with a supporting roller mounted on it, which is located with the possibility of contact with the test tape when it is moving and deviating from a predetermined position, an adjustable vertical pendulum limiter is also fixed on the frame, the position sensor of the test tape is located under the pendulum and serves to control the permissible sagging of the test tape to its maximum deviation from the specified position, a protrusion is mounted on the pendulum, located with the possibility of interaction action with the sensor of the position of the test tape, the sensor and the protrusion are located on an arc of a circle, the center of which is aligned with the center of the axis on which the pendulum is mounted, the lower pair of rollers is shifted to one side relative to the upper pair of rollers, a space is formed between the upper pair and the lower pair of rollers, in which the pendulum is located. 3. A device for rolling out the dough and obtaining a test tape from it, comprising a frame on which an upper pair of rollers having a drive of their rotation in opposite directions is mounted, as well as a lower pair of rollers having a different drive of their rotation in opposite directions, between each pair of rollers an adjustable gap is formed, and the device is equipped with a control unit electrically connected to the position sensor of the test tape and the rotation drive of the upper pair of rollers, characterized in that between the upper and lower pairs of rollers the pendulum is fixed to the frame by means of an axis with a counterweight mounted on it, which holds the pendulum in the upper position, the pendulum is located with the possibility of contact with the test tape when it is moving and deviating from a predetermined position, while an adjustable vertical pendulum limiter is also fixed on the frame, located above on one side of the pendulum, the test tape position sensor for monitoring the allowable tension of the tape to its maximum deviation from the set position, is fixed to the pendulum in a stupa located with the possibility of interaction with the position sensor of the test tape, the sensor and the protrusion are located on an arc of a circle, the center of which is aligned with the center of the axis on which the pendulum is mounted, the lower pair of rollers is shifted to one side relative to the upper pair of rollers, between the upper pair and the lower a pair of rollers formed the space in which the pendulum is located.

Images