JP2731342B2 - Tube pump - Google Patents

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 feeding a liquid in a tube while pressing a flexible tube with a plurality of revolving rollers.

[0002]

2. Description of the Related Art Some vending machines and the like use a tube pump to supply beverages and the like. In such a tube pump, a flexible tube is disposed along an inner surface of a tube receiver having a curved inner surface, and a roller including a plurality of rotating bodies having a circular surface is provided along the inner surface. The roller is driven to revolve, and the roller rolls while pressing the tube between the circular surface and the tube receiver to force the liquid in the tube.

[0003]

However, in a vending machine in which beverage supply is performed intermittently, such as a vending machine, a state in which a roller presses one portion of a tube during a period in which beverage supply is suspended. , The tube cross-sectional area may be permanently deformed and reduced near the site. For this reason, there is a problem that the amount of liquid pumped per unit time changes in accordance with the degree of deformation of the tube over time, as compared with the amount of pumped liquid per unit time in the initial stage of mounting without deformation of the tube. there were.

An object of the present invention is to provide a tube pump capable of stably supplying a constant amount of liquid over a long period of operation.

[0005]

In order to achieve the above object, the present invention provides a tube receiver having a curved inner surface, a flexible tube arranged along the inner surface, and a circular tube. A roller comprising a plurality of rotating bodies having a surface, revolving along the inner surface, and rolling while pressing the tube between the circular surface and the tube receiver to roll the liquid in the tube. In a tube pump for pumping a set amount of liquid for each pumping designation, the angular information of the revolution of the roller is stored for each address, and the angular information is stored in a predetermined address area as the address number advances. A storage device corresponding to the drive in which the revolving angle of the roller is sequentially increased, and counting the number of occurrences of the liquid pressure feeding designation reset when a tube is newly attached, or The timer is reset when a new device is attached, measures an elapsed time after the reset, advances an address of the storage device according to the counted value or the measured value, and a timer for revolving the rollers of the storage device. A roller drive control unit for controlling the roller to revolve according to the angle information.

[0006]

According to the present invention, in the storage device, the revolving angle information of the roller for each address sequentially increases the revolving angle of the roller as the address number advances over a predetermined address area. When the liquid pressure feeding is designated, the address number advances, and the roller is driven to revolve according to the angle information corresponding to each address number.

[0007]

1 and 2 are block diagrams of a tube pump showing an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a pump base fixed to an unillustrated vending machine main body, 2 denotes a tube receiver fixed to the pump base 1, and 3 denotes a flexible member made of a silicone rubber material. Tube for liquid pumping, 4 for tube 3
A cylindrical roller for pumping the liquid therein, a roller support member 5 for pivoting and revolving the roller 4, a motor 6 for rotating the roller support member 5, and a tube 3 for rotating the roller support member 5.
It is an electromagnetic valve that opens and closes the flow path of the liquid in the inside. The tube receiver 2 forms a semicircular inner surface, and the tube 3 is disposed along the inner surface. The roller support member 5 is
A roller shaft 9 is arranged on a concentric circle centered on the rotation shaft 8, and four rollers 4 are pivotally connected to each other at a 90 ° interval so as to be able to rotate.
The tube 3 is interposed in a pressed state between the tube 3 and the inner surface. Therefore, when the roller supporting member 5 rotates, the roller 4 rolls while pressing the tube 3 between its circular surface and the tube receiver 2 to force the liquid in the tube to be fed.
When the liquid is pressure-fed, the electromagnetic valve 7 is opened to rotate the roller support member 5, and when the liquid pressure is stopped, the electromagnetic valve 7 is closed to stop the rotation of the roller support member 5.

S is a drive designation unit for designating the operation of the tube pump in accordance with the vending machine sales designation, DVB is a solenoid valve drive unit for driving the solenoid valve 7 in accordance with the designation of the drive designation unit S, and DVM is one rotation of the motor 6. It is a motor drive unit that rotates in the direction. The ROM is a storage device that stores rotation angle information of the roller support member 5, and the angle information is a rotation for pumping a predetermined amount of beverage in a state where the tube 3 is newly attached to the head address. Corresponding to the angle,
It is expected that the amount of pumping for the rotation angle will decrease by 10% during the liquid pumping for about 24 hours during the actual operation.
In the meantime, the address is advanced by, for example, 100 and the rotation angle is linearly increased by about 10%. CT is an address counter for advancing the address of the storage device ROM. The address counter is reset when the tube 3 is newly attached, counts the number of times drive designation is performed from the drive designation unit S, and corresponds to, for example, about 15 minutes of actual operation. The address of the storage device ROM is incremented by one for every 50 of the count, and when the address reaches 100, the address is fixed. CONT is a roller drive control unit that controls the motor drive unit DVM according to the angle information in the storage device ROM. Each time a drive specification signal from the drive specification unit S is generated, the angle information is read from the storage device ROM, and based on the angle information. The motor driving unit DVM is driven to operate the motor.

In the above configuration, the address counter C
When the tube 3 is newly attached, the detection switch (not shown) is operated to reset T. In the reset state, the drive designation unit S is designated by the sale designation of the vending machine.
When the drive designation signal is transmitted from the controller, the solenoid valve 7 is opened, the head address is specified in the storage device ROM by the address counter CT, and the roller support member 5 rotates for a predetermined time based on the head address. Then, the beverage in the tube is delivered by a predetermined amount, and the electromagnetic valve 7 is closed.
In this way, every time the drive designation signal is transmitted, the beverage is similarly transmitted based on the head address. When the drive designation signal reaches the 16th time from the beginning, the storage device RO
The address of M is advanced by one, and the roller support member 5 delivers the beverage based on the second address. At this time, the pumping amount with respect to the rotation angle has decreased from the beginning, but the operation time has increased by that amount, and the pumping amount has become equal to the initial amount. In this way, the operation time is sequentially increased, and the pumping amount is adjusted so as to be equal to the initial amount. When the address becomes 100, the operation time becomes constant thereafter. After that point, the deflection of the tube 3 is kept almost constant, so that the amount of pumping becomes almost constant without much change from the beginning.

In the above-described embodiment, the drive control of the roller is performed by counting the number of occurrences of the drive designation from the drive designation unit S and revolving the roller by the address set by the counted value. In this example, the elapsed time from when a tube is newly attached is measured, and the roller is driven to revolve at an address set by the measured value. Since the structure of the tube pump of FIG. 2 is the same as that of FIG.
Here, the drive control of the roller will be described.

S is a drive designation unit for designating the operation of the tube pump in accordance with the vending machine sales designation, DVB is a solenoid valve drive unit for driving the solenoid valve 7 in accordance with the designation of the drive designation unit S, and DVM is one rotation of the motor 6. It is a motor drive unit that rotates in the direction. The ROM is a storage device for storing rotation angle information of the roller indicating member 5, and each of the angle information is a roller support for forcing a predetermined amount of beverage under pressure with the tube 3 newly attached to the head address. Corresponding to the rotation angle of the member 5, it is anticipated that the pumping amount for the rotation angle will be reduced by 10% during the liquid pumping up to 100 hours elapsed after the tube is newly attached,
In the meantime, the address is advanced by, for example, 4 and the rotation angle is set to about 1
We are working to increase it by 0%. TI is the storage device R
The timer for advancing the address of the OM is reset when the tube 3 is newly attached, and the elapsed time when the drive is designated from the drive designation unit S is measured.
At 25 hours and 100 hours, the address of the storage device ROM is advanced by one, and when the address becomes 4, the address is fixed. CONT is an operation control unit that controls the motor drive unit DVM in accordance with the angle information in the storage device ROM. Each time a drive specification signal from the drive specification unit S is generated, the angle information is read from the storage device ROM and the motor is controlled based on the angle information. The motor drive is driven by the drive unit DVM.

In the above configuration, when a tube is newly attached, the timer TI is reset by operating the tube set detection switch. In the reset state, when a drive designation signal is sent from the drive designation unit S by the vending machine sale designation, the solenoid valve 7 is opened and the head address is designated in the storage device ROM by the timer TI, and the roller The support member 5 rotates for a predetermined time based on the head address, the beverage in the tube is delivered by a predetermined amount, and the electromagnetic valve 7 is closed. In this way, every time the drive designation signal is transmitted, the beverage is similarly transmitted based on the head address. Then, when the elapsed time when the drive designation signal is transmitted is 10, 25, and 100 hours from the beginning, the address of the storage device ROM is advanced one by one, and the roller supporting member 5 transmits the beverage based on each address. Is done. At this time, the pumping amount with respect to the rotation angle has decreased from the beginning, but the operation time has increased by that amount and the pumping amount has become equal to the initial amount. In this way, the operation time is sequentially increased, and the pumping amount is adjusted so as to be equal to the initial amount. When the address becomes 4, the operation time becomes constant thereafter. After that point, the deflection of the tube 3 is kept almost constant, so that the amount of pumping becomes almost constant without much change from the beginning.

[0014]

As described above, according to the present invention, the tube disposed along the curved inner surface of the tube receiver is rolled while being pressed by a plurality of rollers, and the liquid in the tube is pumped. In the tube pump, the revolving angle information of the roller is stored for each address of the storage device, and the angle information corresponds to the drive in which the revolving angle is sequentially increased with the progress of the address number. The address of the storage device is advanced according to the number of occurrences specified in the shipment or the measured value of the elapsed time since the tube was newly attached, so that the decrease in liquid pumping amount due to tube deformation etc. is compensated and long-term operation The liquid is supplied stably inside.

[Brief description of the drawings]

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

FIG. 2 is a configuration diagram of a tube pump showing one embodiment of the present invention.

FIG. 3 is a graph illustrating correction of a liquid delivery amount according to the first embodiment.

FIG. 4 is a graph showing correction of a liquid delivery amount according to the second embodiment.

[Explanation of symbols]

1 ... pump base, 2 ... tube receiver, 3 ... tube, 4
... Roller, 5 ... Roller support member, 6 ... Motor, 7 ... Electromagnetic valve, 8 ... Tube set detection switch, 10 ... Drive control device, S ... Drive designation section, DVB ... Electromagnetic valve drive section, DVM ...
Motor drive unit, ROM: storage device, CT: address counter, CONT: roller drive control unit, TI: timer

Claims (2)

(57) [Claims] 1. A tube receiver having a curved inner surface, a flexible tube disposed along the inner surface, and a plurality of rotating bodies having a circular surface revolving along the inner surface. And a roller that rolls while pressing the tube with its circular surface and the tube receiver to pressurize the liquid in the tube, and that pumps a set amount of liquid for each specified liquid pumping. A storage device which stores the orbital angle information with respect to an address, and wherein each of the angle information is in a predetermined address area or corresponds to a drive in which the orbital angle is sequentially increased with the progress of the address number; An address counter that is reset when a tube is newly attached, counts the number of occurrences of the liquid pumping designation, and advances the address of the storage device according to the counted value; And a roller drive control section for controlling so as to revolve the driving roller in accordance with the angle information of the revolution of the storage device, a tube pump, characterized in that. 2. The tube pump according to claim 1, wherein said revolving angle information is stored for each address, and said angle information is stored in a predetermined address area or in accordance with progress of an address number. A storage device corresponding to the drive in which the revolving angle is sequentially increased, and resetting when a tube is newly attached, measuring an elapsed time after resetting, and addressing the address of the storage device according to the measured value. A tube pump, comprising: an address counter that advances the rotation; and a roller drive control unit that controls the roller to revolve according to the rotation angle information of the storage device.