JP2000337268A - Tube pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube pump capable of stably carrying out supply of liquid in a fixed quantity. SOLUTION: A control signal to properly rotate a motor 5 is delivered to a motor driving part 16 by reading a data (increase rate of an angle) concerning angular speed correction from a memory address designated by a current counting valve of a counter 13 in accordance with a supply command from a supply command part 11 and correcting a standard angular speed previously set by using the read data. As the standard angular speed ws to actuate the motor 5 for a rotor and standard time ts are previously set in accordance with a kind and supply quantity of liquid to be a supply object and tube size, etc., processing to increase and correct the standard angular speed ws is carried out using the data (increase rate of angular speed) read from a memory 14, hereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube pump for supplying a fixed amount of liquid using an elastic tube.

[0002]

2. Description of the Related Art A tube pump of this type has a tube receiver having a curved surface, an elastic tube disposed along the curved surface of the tube receiver, and a roller capable of pressing and deforming the tube between the tube receiver. A rotating body and a rotation drive source such as a motor for rotating the rotating body in a predetermined direction are provided.

When the rotating body is rotated by a predetermined angle in a predetermined direction from a stopped state by operating a rotary drive source, the rollers of the rotating body revolve while pressing and deforming the tube with the tube receiver. The liquid in the inside is pressure-fed in the roller moving direction, and a predetermined amount of liquid is supplied according to the rotation angle of the rotating body.

[0004]

The above-mentioned tube pump presses and deforms the tube by a roller that revolves and revolves to pump the liquid in the tube in a predetermined direction. The elastic force of the tube decreases, and it is difficult for the tube to return to its original shape even when the roller passes. Also, the tube is placed along the curved surface,
In addition, since a part of the tube is pressed by the roller, the tube is hammered with the lapse of time after the tube is attached and it is difficult to return to the original shape even if the liquid supply is not performed.

[0005] Since the amount of liquid supply in the above-mentioned tube pump is roughly defined by the product of the cross-sectional area and the length of the tube bore, if the tube does not return to its original shape, the cross-sectional area decreases. Liquid supply amount in the period cannot be obtained.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tube pump capable of stably supplying a fixed amount of liquid.

[0007]

To achieve the above object, a tube pump according to the present invention comprises a tube receiver having a curved surface, an elastic tube arranged along the curved surface of the tube receiver, and a tube receiver. A rotating body having a roller capable of pressing and deforming the tube between the rotating body and a rotation drive source for rotating the rotating body in a predetermined direction, and a predetermined amount of liquid in the tube is supplied by a revolving motion of the roller accompanying rotation of the rotating body. In the supply tube pump, a counting means for counting the cumulative number of liquid supply, and the reference angular velocity is sequentially increased and corrected with the increase of the cumulative number of liquid supply, and the rotating body is rotated by the corrected angular velocity for a reference time. Rotation control means for transmitting a drive signal for causing the rotation drive source to rotate. In this tube pump, the reference angular velocity is sequentially increased and corrected as the cumulative number of liquid supply increases, and the rotating body rotates for the reference time at the corrected angular velocity, and a predetermined amount of liquid is supplied by the rotation of the rotating body. Is done.

In order to achieve the above object, a tube pump according to the present invention comprises a tube receiver having a curved surface, an elastic tube disposed along the curved surface of the tube receiver, and a tube receiver. A tube pump including a rotating body having a roller capable of pressing and deforming the rotating body, and a rotation driving source for rotating the rotating body in a predetermined direction, and supplying a predetermined amount of liquid in the tube by a revolving motion of the roller accompanying rotation of the rotating body. And counting means for counting the cumulative number of liquid supply, and sending a drive signal for rotating the rotating body at a reference angular velocity for a reference time to the rotary drive source until the cumulative number of liquid supply reaches a predetermined value. Along with
After the cumulative number reaches the predetermined value, the reference angular velocity is sequentially increased and corrected with the increase of the liquid supply cumulative number, and the drive signal for rotating the rotating body for the reference time at the corrected angular velocity is rotated. Rotation control means for sending to a drive source. In this tube pump, the rotating body rotates at the reference angular velocity for a reference time until the cumulative number of liquid supply reaches a predetermined value, and after the cumulative number reaches the predetermined value, the rotating body rotates at the reference angular velocity. Are rotated for the reference time at the angular velocity after the correction of the increase in the rotation speed, and a predetermined amount of liquid is supplied by the rotation of the rotating body.

Further, in order to achieve the above object, a tube pump according to the present invention comprises a tube receiver having a curved surface, an elastic tube disposed along the curved surface of the tube receiver, and a tube receiver. A tube pump including a rotating body having a roller capable of pressing and deforming the rotating body, and a rotation driving source for rotating the rotating body in a predetermined direction, and supplying a predetermined amount of liquid in the tube by a revolving motion of the roller accompanying rotation of the rotating body. In, the time means for measuring the elapsed time after the tube is newly attached, and the reference angular velocity is sequentially increased and corrected with an increase in the elapsed time of the tube installation, the rotational body for the reference time at the corrected angular velocity. Rotation control means for sending a drive signal for rotation to the rotation drive source. In this tube pump, the reference angular velocity is sequentially increased and corrected as the elapsed time of tube installation increases, and the rotating body rotates for the reference time at the corrected angular velocity, and a predetermined amount of liquid is supplied by the rotation of the rotating body. Is done.

Still further, in order to achieve the above object, a tube pump according to the present invention includes a tube receiver having a curved surface, an elastic tube disposed along the curved surface of the tube receiver, and a tube receiver. A tube including a rotating body having a roller capable of pressing and deforming a tube, and a rotation driving source for rotating the rotating body in a predetermined direction, and supplying a predetermined amount of liquid in the tube by a revolving motion of the roller accompanying rotation of the rotating body. In the pump, a time measuring means for measuring an elapsed time after newly attaching the tube, and a drive signal for rotating the rotating body at a reference angular velocity for a reference time until the elapsed time for attaching the tube reaches a predetermined value. After sending to the rotation drive source, after the elapsed mounting time reaches the specified value, the reference angular velocity increases sequentially as the elapsed mounting time of the tube increases Correct and, and a rotation control means for sending a drive signal for rotating only the rotary drum reference time corrected angular velocity to the rotational drive source. In this tube pump, the rotating body rotates at the reference angular velocity for the reference time until the elapsed mounting time of the tube reaches a predetermined value,
After the attachment elapsed time reaches a predetermined value, the rotating body rotates for the reference time at the angular velocity obtained by increasing and correcting the reference angular velocity, and a predetermined amount of liquid is supplied by the rotation of the rotating body.

The above and other objects, constitutional features, and operational effects of the present invention will become apparent from the following description and the accompanying drawings.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIGS. 1 to 3 relate to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a pump base, 2 denotes a tube receiver, and 3 denotes a tube. 4 is a rotating body, 5 is a motor, 6 is a solenoid valve, 11 is a supply command unit, 1
Reference numeral 2 denotes an electromagnetic valve driving unit, 13 denotes a counter, 13a denotes a switch for resetting the counter, 14 denotes a memory, 15 denotes a supply control unit, and 16 denotes a motor driving unit.

The tube pump shown in FIG. 1 is installed, for example, in an in-flight brewing type beverage vending machine, and is used as a device for supplying a liquid such as syrup from a tank to a brewing place such as a cup.

The tube receiver 2 has a substantially semicircular shape as a whole,
It has a curved surface 2a with a predetermined curvature inside. The tube receiver 2 is attached to the pump base 1, and the tube 3 is arranged along the curved surface 2a.

The tube 3 is made of an elastic material such as silicon rubber and has an inner hole having a predetermined cross-sectional area. One end of the tube 3 is inserted into a liquid tank (not shown), and an electromagnetic valve 6 for opening and closing a flow path is provided on the way from the one end to the rotating body 3.

The rotating body 4 has a cross shape, and a columnar roller 4a is rotatably supported at each of four ends. The maximum outer diameter of the rotating body 4 including the four rollers 4a is slightly smaller than the curvature of the curved surface 2a, and each roller 4a has a sufficient axial length and diameter to press the tube 3 by its outer peripheral surface. ing. The rotating body 4 is arranged so that its center coincides with the center of curvature of the curved surface 2a, and the outer peripheral surface of the roller 4a faces the curved surface 2a of the tube receiver 2. 1
Connected to the shaft of the motor 5 attached to the motor.

When the rotating body 4 is rotated by a predetermined angle in a predetermined direction from the stopped state by operating the motor 5, the roller 4a of the rotating body 4 revolves while pressing and deforming the tube 3 with the tube receiver 2. As a result, the liquid in the tube 3 is pressure-fed in the roller moving direction, and a predetermined amount of liquid according to the rotation angle of the rotating body 4 is supplied.

The supply command section 11 sends a supply command to each of the solenoid valve drive section 12, the counter 13, and the supply control section 15 based on a sales command from a main controller (not shown) of the vending machine. The operations of the electromagnetic valve driving unit 12, the counter 13, and the supply control unit 15 based on the supply command will be described later in detail.

The memory 14 has a data table relating to the angular velocity correction of the motor 5. The address of the data relating to the angular velocity correction corresponds to each of the cumulative numbers of liquid supply counted by the counter 13. For example, when the amount of liquid supplied by the tube pump per unit time has a decreasing gradient as shown by a broken line in FIG. 5000 times and the liquid supply is 1
In the case of 0% decrease, a correction amount (increase rate of angular velocity) for compensating for the decrease in the liquid supply amount is determined for each cumulative number of liquid supply based on the gradient shown by the solid line in FIG. .

The operation of the tube pump according to the first embodiment will be described below.

When a sales command is issued from the main controller of the vending machine to the supply command unit 11, a supply command is sent from the supply command unit 11 to each of the solenoid valve driving unit 12, the counter 13, and the supply control unit 15. By the way, the counter 13 has a switch 13a when the tube 3 is attached.
Has been reset automatically or manually.

The solenoid valve drive unit 12 sends a drive signal to the solenoid valve 6 to open the solenoid valve 6 for a predetermined time based on a supply command from the supply command unit 11. The counter 13 counts the cumulative number of liquid supply based on the supply command from the supply command unit 11, and sends a signal (address designation signal) relating to the current count value to the memory 14.

The supply control unit 15 reads data (angular increase rate) relating to angular velocity correction from a memory address specified by the current count value of the counter 13 based on a supply command from the supply command unit 11 (FIG. 2). 3 steps ST1 and ST2). Then, the preset reference angular velocity is corrected using the read data,
A control signal for appropriately rotating the motor 5 is sent to the motor drive unit 16 (steps ST3 and ST3 in FIG. 3).
4).

More specifically, the reference angular velocity ωs and the reference time ts for operating the motor 5 are preset according to the type and supply amount of the supply liquid, the tube size, and the like. A process for increasing the reference angular velocity ωs by using the read data (increase rate of the angular velocity) is performed. For example, when the data at the designated address in the memory 14 is + 2%, ω = ωs +
The angular velocity ω of the motor 5 for the current liquid supply is determined by (ωs × 0.02), and a control signal relating to the corrected angular velocity ω and the reference time ts is sent to the motor drive unit 16.

The motor drive section 16 sends a drive signal to the motor 5 for operating the motor 5 at the corrected angular velocity ω for the reference time ts based on the control signal from the supply control section 15.

As described above, the memory 14 is provided with a data table which defines the rate of increase of the angular velocity, and the address of this data table corresponds to the accumulated number of liquid supply counted by the counter 13. Yes, it is. Since the relationship between the increase rate of the angular velocity and the cumulative number is preset based on the gradient shown by the solid line in FIG. 2, the angular velocity of the motor 5 gradually increases as the cumulative number of liquid supply increases.

When the motor 5 of the tube pump is operated at a constant angular velocity and at a constant time, the liquid supply amount per unit time is as shown by a dashed line in FIG. 2 because the tube 3 hardly returns to its original shape. It follows the decreasing gradient. However, if the angular velocity of the motor 5 is increased and corrected in accordance with the cumulative number of liquid supplies as described above, the increase correction increases the rotation angle of the rotating body 4 per reference time to compensate for the decrease in the liquid supply amount. As a result, a constant amount of liquid can be constantly supplied within a predetermined time.

Since the preset reference time does not need to be increased, the time loss associated with the increase correction can be eliminated, and the timing adjustment with other devices associated with the increase correction becomes unnecessary.

In the above-described first embodiment, an example in which the angular velocity of the motor 5 is increased and corrected from the first liquid supply is exemplified. In the case where the resilience can be sufficiently expected, until the cumulative number of liquid supply reaches a predetermined value, for example, the angular velocity correction as described above is not performed until the cumulative number of liquid supply reaches 15 times. After reaching a predetermined value, the angular velocity of the motor 5 may be sequentially increased and corrected with an increase in the cumulative number.

Further, in the above-described first embodiment, an example in which data (an angular velocity correction ratio) corresponding to each of the cumulative number of times of liquid supply is prepared, however, the angular velocity is corrected by a predetermined number of times, for example, 10 times. It may be performed stepwise in units of times.

Second Embodiment FIGS. 4 and 5 relate to a second embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a pump base, 2 denotes a tube receiver, 2a denotes a curved surface, and 3 denotes a curved surface. tube,
Reference numeral 4 denotes a rotating body, 4a denotes a roller, 5 denotes a motor, and 6 denotes an electromagnetic valve. These components are the same as those in the first embodiment, and thus description thereof is omitted. Reference numeral 21 in FIG.
Reference numeral 2 denotes an electromagnetic valve driving unit, 23 denotes a timer, 23a denotes a switch for resetting a timer, 24 denotes a memory, 25 denotes a supply control unit, and 26 denotes a motor driving unit.

The supply command unit 21 sends a supply command to each of the solenoid valve driving unit 22 and the supply control unit 25 based on a sales command from a main controller (not shown) of the vending machine. The operations of the electromagnetic valve driving unit 22 and the supply control unit 25 based on the supply command will be described later in detail.

The timer 23 is for measuring the elapsed time after the tube 4 is newly attached.
Is reset automatically or manually by the switch 23a when attached.

The memory 24 has a data table relating to the angular velocity correction of the motor 5. The address of the data relating to the angular velocity correction corresponds to the elapsed mounting time of the tube 3 measured by the timer 23. For example, when the amount of liquid supplied per unit time by the tube pump draws a decreasing curve as shown by a broken line in FIG. 100 hours of liquid supply
In the case of 0% decrease, the correction amount (the increase rate of the angular velocity) for compensating for the decrease in the liquid supply amount based on the curve shown by the solid line in FIG.
For example, it is determined every hour.

The operation of the tube pump according to the second embodiment will be described below.

When a sales command is issued from the main controller of the vending machine to the supply command unit 21, the supply command is sent from the supply command unit 21 to each of the solenoid valve driving unit 22 and the supply control unit 25.

The solenoid valve drive section 22 sends a drive signal to the solenoid valve 6 to open the solenoid valve 6 for a predetermined time based on a supply command from the supply command section 21. The timer 23 keeps track of the elapsed time after the tube 3 is newly attached, regardless of the presence or absence of the sales command, and sends a signal (address designation signal) relating to the current time value to the memory 24. .

The supply control section 25 reads data relating to angular velocity correction (angle increase rate) from a memory address specified by the current time value of the timer 23 based on a supply command from the supply command section 21. Then, a preset reference angular velocity is corrected using the read data, and a control signal for appropriately rotating the motor 5 is transmitted to the motor driving unit 26.

More specifically, the reference angular velocity ωs and the reference time ts for operating the motor 5 are set according to the type and supply amount of the liquid to be supplied, the tube size, and the like. The above-described process of increasing and correcting the reference angular velocity ωs using the data (increase rate of angular velocity) is performed. For example, when the data at the designated address in the memory 24 is + 5%, ω = ωs +
The angular velocity ω of the motor 5 for the current liquid supply is determined by (ωs × 0.05), and a control signal relating to the corrected angular velocity ω and the reference time ts is sent to the motor drive unit 26.

The motor drive unit 26 sends a drive signal to the motor 5 for operating the motor 5 at the corrected angular velocity ω for the reference time ts based on the control signal from the supply control unit 25.

As described above, the memory 24 is provided with a data table defining the rate of increase of the angular velocity, and the address of this data table indicates the elapsed time of the installation of the tube 3 measured by the timer 23. Yes, it is. Since the relationship between the rate of increase of the angular velocity and the number of times of accumulation is set in advance based on the curve shown by the solid line in FIG. 5, the angular velocity of the motor 5 gradually increases as the mounting elapsed time of the tube 3 increases.

When the motor 5 of the tube pump is operated at a constant angular velocity and at a constant time, the amount of liquid supplied per unit time is indicated by a dashed line in FIG. 5 because the tube 3 hardly returns to its original shape. It follows the decreasing curve. However, as described above, if the angular velocity of the motor 5 is increased and corrected according to the mounting elapsed time of the tube 3, the rotation angle of the rotating body 4 per reference time is increased by this increased correction to reduce the decrease in the liquid supply amount. This makes it possible to constantly supply the liquid in a fixed amount within a predetermined time.

Since the preset reference time does not need to be increased and corrected, the time loss associated with the increased correction can be eliminated, and the timing adjustment with other devices due to the increased correction becomes unnecessary.

In the above-described second embodiment, an example in which the angular velocity of the motor 5 is increased and corrected from the first liquid supply is described. If sufficient restorability can be expected, the angular velocity correction as described above is not performed until the mounting elapsed time of the tube 3 reaches a predetermined value, for example, 10 hours. After the time reaches a predetermined value, the angular velocity of the motor 5 may be sequentially increased and corrected with an increase in the mounting elapsed time.

Further, in the above-described second embodiment, the data (the correction rate of the angular velocity) corresponding to the elapsed mounting time of the tube 3 is prepared, but the correction of the angular velocity is performed in a predetermined time unit, for example, 5 times. It may be performed stepwise in units of time.

[0046]

As described in detail above, according to the present invention,
Even if the amount of liquid supply per unit time decreases due to the difficulty of the tube returning to its original shape,
By compensating for the decrease by increasing the angular velocity, constant supply of the liquid can be stably performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a tube pump showing a first embodiment of the present invention.

FIG. 2 is a diagram showing the relationship between the cumulative number of liquid supply and the liquid supply amount, and the relationship between the cumulative number of liquid supply and the angular velocity correction amount.

FIG. 3 is a flowchart showing a procedure of angular velocity correction.

FIG. 4 is a configuration diagram of a tube pump showing a second embodiment of the present invention.

FIG. 5 is a diagram showing a relationship between a tube mounting elapsed time and a liquid supply amount, and a relationship between a tube mounting elapsed time and an angular velocity correction amount.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pump base, 2 ... Tube receiver, 2a ... Curved surface, 3
... tube, 4 ... rotor, 4a ... roller, 5 ... motor,
6 electromagnetic valve, 11 supply instruction unit, 12 electromagnetic valve drive unit
13: counter, 13a: counter reset switch, 14: memory, 15: supply control unit, 16: motor drive unit, 21: supply command unit, 22: solenoid valve drive unit, 23
... Timer 23a Switch for resetting timer 24 Memory 25 Supply control unit 26 Motor drive unit

Claims (4)

[Claims] A rotating member having a tube receiver having a curved surface, an elastic tube disposed along the curved surface of the tube receiving member, a roller capable of pressing and deforming the tube between the tube receiving member, and a rotating member. A tube pump comprising: a rotation drive source configured to rotate in a predetermined direction; a tube pump configured to supply a predetermined amount of liquid in a tube by a revolving motion of a roller accompanying rotation of a rotating body; Rotation control means for sequentially increasing and correcting the reference angular velocity with an increase in the cumulative number of supply, and sending a drive signal for rotating the rotating body for the reference time at the corrected angular velocity to the rotary drive source. A tube pump characterized by the above-mentioned. 2. A rotating body having a tube receiver having a curved surface, an elastic tube disposed along the curved surface of the tube receiving, a roller capable of pressing and deforming the tube between the tube receiving, and a rotating body. A tube pump comprising: a rotation drive source configured to rotate in a predetermined direction; a tube pump configured to supply a predetermined amount of liquid in a tube by a revolving motion of a roller accompanying rotation of a rotating body; a counting unit configured to count an accumulated number of liquid supply; Until the cumulative number of supply reaches a predetermined value, a drive signal for rotating the rotating body at the reference angular velocity for a reference time is sent to the rotary drive source, and after the cumulative number reaches the predetermined value, the liquid supply is stopped. The reference angular velocity is sequentially increased and corrected as the number of times of accumulation increases, and a drive signal for rotating the rotator for the reference time at the corrected angular velocity is sent to the rotary drive source. That and a rotation control means, a tube pump, characterized in that. 3. A rotating body having a tube receiver having a curved surface, an elastic tube arranged along the curved surface of the tube receiving, a roller capable of pressing and deforming the tube between the tube receiving, and a rotating body. A rotation drive source for rotating the tube in a predetermined direction, and supplying a predetermined amount of liquid in the tube by a revolving motion of the roller accompanying rotation of the rotating body. In the tube pump, an elapsed time after newly mounting the tube is measured. A rotation means for sequentially increasing and correcting the reference angular velocity with an increase in elapsed time of mounting the tube, and sending a drive signal for rotating the rotating body for the reference time at the corrected angular velocity to the rotary drive source. A tube pump, comprising: a control unit. 4. A rotating body having a tube receiver having a curved surface, an elastic tube disposed along the curved surface of the tube receiving, a roller capable of pressing and deforming the tube between the tube receiving, and a rotating body. A rotation drive source for rotating the tube in a predetermined direction, and supplying a predetermined amount of liquid in the tube by a revolving motion of the roller accompanying rotation of the rotating body. In the tube pump, an elapsed time after newly mounting the tube is measured. A timer means for transmitting a drive signal for rotating the rotary body at the reference angular velocity for a reference time to the rotary drive source until the elapsed mounting time of the tube reaches a predetermined value, and the elapsed mounting time reaches the predetermined value. After that, the reference angular velocity is sequentially increased and corrected with an increase in the elapsed time of mounting the tube, and the rotating body is rotated for the reference time at the corrected angular velocity. A drive signal and a rotation control means for sending to the rotational drive source, a tube pump, characterized in that.