JP5792528B2 - Liquid filling apparatus and liquid filling method - Google Patents

Description

  The present invention relates to a liquid filling apparatus and a liquid filling method for quantitatively filling a liquid such as a standing pouch, an ampoule, and a container with a liquid.

  In the filling and packaging industry, etc., a filling valve is provided in front of the filling nozzle in the filling path for quantitative filling into the container, and by operating this filling valve, filling can be started and stopped or the filling flow rate can be adjusted. Has been done.

  For example, in the filling apparatus shown in FIG. 22, a liquid passage 50 that guides liquid from a liquid tank (not shown) that stores the liquid to be filled to a filling nozzle is provided, and a flexible tube 51 is provided in a certain section of the liquid passage 50. And a plurality of vertically movable pressing members 52 and 53 for pressing the flexible tube 51 are provided as a filling valve, and the flow rate of the flexible tube 51 is controlled by the pressing members 52 and 53 during filling. When the filling is stopped, the downstream pressing member 53 is moved from the forward position to the backward position to cause a suck back phenomenon to prevent liquid dripping (see Patent Document 1).

JP-A-7-52902

  However, if the pressing members 52 and 53 are repeatedly operated to move back and forth, the flexible tube 51 is fatigued more than necessary and deteriorates early, and the restoring force of the flexible tube 51 disappears. In some cases, the filling flow rate per hour is changed (decreased) by being in a crushed state.

  Furthermore, in the case of a filling device (for example, a rotary filling device) configured to arrange a plurality of filling nozzles and perform filling of a plurality of containers supplied at the same time at a predetermined amount, There are individual differences in the pressure members and the air actuators that actuate the pressure members arranged for each filling nozzle, and there are variations in operation time and operation stroke, so the filling amount of each filling nozzle is constant. It was difficult to make adjustments so that they were aligned with each other, and it required experience and skills to make adjustments, so there were various problems such as the limited number of workers.

  The present invention has been made in order to solve the above-described problems. In the filling of the liquid, the fixed amount filling is ensured, the liquid dripping after the filling is prevented, and the containers and the like during the filling are prevented from being soiled. The liquid filling device can improve the durability life of the flexible tube as much as possible, can arrange and set the filling device easily and reliably, and can be driven silently. Similarly, in liquid filling, there is provided a liquid filling method capable of ensuring quantitative filling, preventing liquid dripping after filling, and preventing contamination of containers and the like during filling. The purpose is that.

The liquid filling apparatus of the present invention that solves the above-mentioned problems is provided between a tank that stores a liquid to be filled, a filling nozzle that injects the liquid into a container, and between the tank and the filling nozzle, and has a fixed section. A liquid flow path constituted by a flexible tube, an operating means for opening and closing the liquid flow path, a filling amount detection means for detecting a filling amount of liquid in the container, and a detection result of the filling amount detection means And a controller for controlling the driving of the operating means based on the driving means, wherein the operating means rotates forward and backward by driving means disposed on a support and driving of the driving means. And a pressing member that presses the flexible tube by rotation of the rotor and is capable of adjusting an opening / closing amount of the liquid flow path, and the control unit includes the driving unit. Controlling the rotation of the rotor Let row the opening and closing of the liquid flow path by adjusting the amount.

The liquid filling apparatus of the present invention is provided with a nozzle insertion mechanism to position the tip of the filling nozzle in the liquid filled in the container, said rotor presses the flexible tube by the rotation of the rotor A pair of pressing members capable of closing the liquid flow path, and the control unit detects the supply shortage when the supply shortage is detected by the detection result of the filling amount detection means. Among the pressing members, the one pressing member that comes in contact with and separates from the flexible tube at a position away from the filling nozzle adjusts the opening / closing amount of the liquid flow path by pressing the flexible tube, The drive of the drive means is controlled so as to additionally fill the container with a deficient amount of liquid, and when overfilling is detected by the detection result of the filling amount detection means, the liquid passage is opened by the one pressing member. In the closed state The nozzle insertion mechanism is driven to position the tip of the filling nozzle in the liquid filled in the container, and the other of the pair of pressing members that contacts and separates from the flexible tube at a position close to the filling nozzle. The flexible tube is pressed by the pressing member, and a predetermined amount of liquid is recovered from the container by negative pressure in the liquid flow path from the position where the one pressing member is closed to the filling nozzle. In addition, the first feature is to control the driving of the driving means.

Furthermore, in the liquid filling apparatus of the present invention, the rotor is brought into contact with the flexible tube from the direction of widening when pressed by the pressing member, and the cross-sectional shape is not pressed. A restoring member for restoring the holding member is disposed, and when the controller releases the contact of the pressing member with the flexible tube of the pressing member, the restoring member is replaced with the pressing member. A second feature is that the drive of the drive means is controlled to rotate the rotor so as to be engaged.

Furthermore, the liquid filling apparatus according to the present invention further includes nozzle tip liquid detection means capable of detecting the presence or absence of droplets exposed from the tip of the filling nozzle, and the control unit is configured to detect the filling nozzle by the filling nozzle tip liquid detection means. When a liquid droplet is detected at the tip, the flexible tube is continuously pressed by the pressing member that presses the flexible tube and closes the liquid flow path, and the liquid flow path is closed. The third feature is that the drive of the drive means is controlled so as to rotate the rotor so that the pressing position of the tube is moved to the upstream side of the liquid flow path.

In the liquid filling method of the present invention, the liquid channel is arranged in a certain section of the liquid channel disposed between the tank for storing the liquid to be filled and the filling nozzle. This is a liquid filling method in which quantitative filling is performed while adjusting the flow rate of the liquid flowing in the liquid flow path by pressing the porous tube by the rotation of a rotor that can be rotated forward and backward by driving of an electric drive means. In addition, performing quantitative filling by multiple stages of filling with different flow rates, and setting the time required for opening and closing the liquid flow path when switching each stage of varying the flow rate according to the type of the liquid, The driving of the electric driving means is controlled in consideration of the time required for the opening / closing operation.

According to the liquid filling device of the present invention, the pressing member is not in contact with the flexible tube by controlling the driving of the driving means to adjust the amount of rotation of the rotor in the forward and reverse directions. The pressurization includes a large-capacity filling state in which the flow path is fully opened and a large flow rate is obtained, and a closed state in which the pressing member strongly sandwiches and presses the flexible tube and closes the liquid flow path to be fully closed. Small flow rate filling that allows the member to sandwich the flexible tube between the wall member and press it to open the liquid flow path halfway at any position between the fully open state and the fully closed state. A quantitative filling can be performed by switching between states.

Such a liquid filling apparatus can be realized by using an electric drive means such as an electric motor or a direct acting electric actuator as the drive means . In that case, an air actuator like the conventional filling apparatus described above is arranged. Therefore, the filling operation can be performed more silently than the switching (driving) sound of the air actuator.

  Further, the rotation amount of the driving means is programmed so as to be automatically set in consideration of the viscosity of the liquid to be filled, the filling amount, etc., so that the operation input means provided in the liquid filling apparatus can be used. Necessary information and the like can be input and set, and anyone can easily adjust regardless of the experience and skills of the operator.

  Further, after pressing the flexible tube with the pressing member to close the liquid flow path, the pressure member is further rotated in the pressing direction with respect to the flexible tube, thereby generating a negative pressure in the liquid flow path. Thus, the liquid droplet remaining at the tip of the filling nozzle is sucked into the liquid flow path to prevent the liquid from dripping after the filling, thereby preventing the container or the like during the filling from being soiled.

  Further, based on the filling amount detected by the filling amount detection means, it is possible to execute feedback control for adjusting the amount of rotation of the rotor by controlling the driving of the driving means so as to ensure quantitative filling. Can do.

According to the liquid filling apparatus having the first feature, it becomes possible to execute feedback control for performing a small amount of additional supply and recovery of the liquid based on the filling amount detected by the filling amount detection means. Filling can be further ensured.

Still further, according to the liquid filling apparatus having the second feature, by bringing the restoring member into contact with the flexible tube from the direction of widening when being crushed by the pressing member after filling, The restoration of the collapsed shape of the flexible tube can be assisted, and the durable life of the flexible tube is improved as much as possible, and the shape of the flexible tube when the pressing member is not in contact is always predetermined. By holding as a shape, it is possible to make the quantitative filling more reliable.

Then, according to the liquid filling apparatus having the third feature, when the liquid droplet is detected at the tip of the filling nozzle by the filling nozzle tip liquid detection means, the flexible tube is pressed to The drive means is controlled so as to further rotate the closed pressing member in the direction toward the anti-filling nozzle, and a negative pressure is generated in the liquid flow path to cause the liquid droplets remaining at the tip of the filling nozzle to flow. By sucking it up into the road, it is possible to prevent the liquid from dripping after filling and to prevent the containers and the like from being dirty at the time of filling. And by preventing the dripping in this way, the dripping time can be omitted from the filling time, so the time required for filling the container with the liquid amount can be shortened and the efficiency of the filling operation can be improved. Become.

  Thus, according to the liquid filling apparatus of the present invention, it is possible to perform a small amount of additional filling of liquid, feedback control by suction, and to ensure a quantitative filling with a collapsed shape restoring member of the flexible tube, Prevents liquid dripping after filling and prevents contamination of containers, etc. during filling, improves the durable life of the flexible tube as much as possible, and simplifies installation and setting of filling equipment In addition, there are special effects such as being able to be performed reliably.

Further, according to the liquid filling method having the above-described features , the flexible tube of the pressing member provided on the rotor is adjusted by controlling the drive of the driving means to adjust the amount of rotation of the rotor in the forward and reverse directions. By adjusting the flow rate of the liquid flowing in the liquid flow path by changing the pressing state against the liquid, it becomes possible to adjust the flow rate of the liquid in a stepless manner, and the liquid quantitative filling can be executed more simply and reliably. . In addition, if an electric motor or a direct-acting electric actuator is used as the driving means, it is not necessary to provide an air actuator as in the conventional filling device described above, and the filling is performed more silently than the switching (driving) sound of the air actuator. Work can be done.

Thus, according to the liquid filling method of the present invention, in quiet driving, Ki is possible to improve the accuracy of the quantitative filling, or, fouling of the container or the like during filling to prevent dripping after filling There are special effects such as being able to prevent it.

Sectional drawing of the principal part which shows the fundamental structure of the liquid filling apparatus of this invention. (A) is principal part sectional drawing which shows the large capacity filling state in the liquid filling apparatus of 1st Embodiment of this invention, (b) is a key figure which shows the small capacity filling state in the liquid filling apparatus of 1st Embodiment of this invention. Partial sectional view, (c) is a principal sectional view showing a closed state in the liquid filling apparatus according to the first embodiment of the present invention. Cross-sectional view of the main part of the left visual field in FIG. 2 is a cross-sectional view of the main part viewed from above the drawing of FIG. 2 is a cross-sectional view of the main part as viewed from above the drawing of FIG. 2 is a cross-sectional view of the main part viewed from above the drawing of FIG. (A) is principal part sectional drawing which shows the state with a droplet at a filling nozzle after the filling in the liquid filling apparatus of 1st Embodiment of this invention, (b) is 1st Embodiment of this invention of (a). Cross-sectional view of the main part showing a state in which the liquid droplets in the filling nozzle are sucked after filling in the liquid filling device Sectional drawing of the principal part which shows another example of the shape of the pressing member in the liquid filling apparatus of 1st Embodiment of this invention. Sectional drawing of the principal part which shows another example of the shape of the rotor in the liquid filling apparatus of 1st Embodiment of this invention. (A) is principal part sectional drawing which shows the shape and obstruction | occlusion state of the holding member in the liquid filling apparatus of 2nd Embodiment of this invention, (b) is the shape of the holding member in the liquid filling apparatus of 2nd Embodiment of this invention. And cross-sectional view of the main part showing a large-capacity filling state 10 is a cross-sectional view of the main part as viewed from the top of the drawing. 10 is a cross-sectional view of the main part as viewed from above the drawing of FIG. (A) is principal part sectional drawing which shows the obstruction | occlusion state in the liquid filling apparatus of 3rd Embodiment of this invention, (b) shows the large capacity filling state in the liquid filling apparatus of 3rd Embodiment of this invention, and a restoring member Sectional view showing the positional relationship between the tube and the flexible tube 13 is a cross-sectional view of the main part as viewed from above the drawing of FIG. 13 is a cross-sectional view of the main part as viewed from above the drawing of FIG. These are principal part sectional drawings which show another example of a shape of the decompression | restoration member in the liquid filling apparatus of 3rd Embodiment of this invention. FIG. 16 is a cross-sectional view of the main part as viewed from above. (A) is principal part sectional drawing which shows the obstruction | occlusion state by the filling amount insufficient in the liquid filling apparatus of 4th Embodiment of this invention, (b) is at the time of the additional filling in the liquid filling apparatus of 4th Embodiment of this invention. Cross-sectional view of the main part showing the small volume filling state, (c) is a cross-sectional view of the main part showing the closed state after the filling amount correction in the liquid filling apparatus of the fourth embodiment of the present invention. (A) is principal part sectional drawing which shows the obstruction | occlusion state by the overfilling in the liquid filling apparatus of 4th Embodiment of this invention, (b) is in the liquid of the filling nozzle in the liquid filling apparatus of 4th Embodiment of this invention. Cross-sectional view of the main part showing the inserted state, (c) is a cross-sectional view of the main part showing the state when the excess liquid is sucked up in the liquid filling apparatus of the fourth embodiment of the present invention, and (d) is the third embodiment of the present invention. Sectional drawing which shows the obstruction | occlusion state after sucking up excess liquid in the liquid filling apparatus of this (A) is the principal part sectional drawing which shows the obstruction | occlusion state in the liquid filling apparatus of 5th Embodiment of this invention, and shows the arrangement | positioning state of a linear motion type electric actuator, (b) is the liquid of 5th Embodiment of this invention. Main part sectional view showing the state of large capacity filling in the filling device and the arrangement of the direct acting electric actuator It is principal part sectional drawing which shows another structural example of the wall member in the liquid filling apparatus of this invention, (a) is the positional relationship between the pressing member and the curved surface area | region of a wall member in the state immediately after filling, and the state of residual liquid FIG. 4B is a sectional view of the main part showing the positional relationship between the pressing member and the curved surface area of the wall member and the state of the remaining liquid when the excess liquid is sucked up, and FIG. Cross-sectional view of the main part showing the positional relationship between the pressing member and the curved surface area of the wall member and the state of the remaining liquid after Sectional drawing which shows the outline of the conventional liquid filling apparatus

  Next, embodiments of the liquid filling apparatus and the liquid filling method of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the liquid filling apparatus of the present invention performs a fixed filling process of liquid such as food on the container A placed on the table 1 and stores the liquid L to be filled. A tank 2, a filling nozzle 3 positioned above the container A at the filling site, a liquid flow path 5 having a pipe 4 connecting the tank 2 and the filling nozzle 3, and a fixed section of the liquid flow path 5 The flexible tube 6 is sandwiched between the flexible tube 6 that is disposed and forms the liquid flow path 5 together with the pipe 4, and the wall member 7 disposed along the liquid flow path 5. And an operating means 8 for opening and closing the liquid flow path 5.

<First Embodiment>
Here, in the liquid filling apparatus according to the first embodiment shown in FIGS. 2 to 9, the flexible tube 6 has a circular cross section due to a flexible (elastic) material such as rubber provided in the liquid flow path 5. It is formed in a tube shape and is connected to a terminal portion of the pipe 5 connected to the tank 2.

  The actuating means 8 performs an opening / closing operation of the liquid flow path 5 by pressing the flexible tube 6 or releasing the pressure in the liquid flow path 5 portion where the flexible tube 6 is disposed. A drive motor 10A as drive means 10 disposed on a support 9 attached to a liquid flow path 5 comprising a pipe 4 and a shaft that is supported concentrically with a rotating shaft 11 of the drive motor 10A. A rotor 12 which can be rotated forward and backward by driving 10A, and disposed on one side of the rotor 12, and the flexible tube 6 is attached to the support body 9 by forward and reverse rotation of the rotor 12. Based on the pressing member 13 which is sandwiched between the integrally formed wall member 7 and whose pressing state (pressing amount) can be adjusted, and the input driving condition, the driving of the driving motor 10A is controlled. Control unit 1 for adjusting the amount of rotation (rotation angle) of the rotor 12 Provided with a door. Further, as the drive motor 10A, a motor such as a stepping motor or a servo motor can be used. Until the following fourth embodiment, the rotational direction of the drive motor 10A and the rotor 12 when weakening the pressing of the pressing member 13 against the flexible tube 6 is considered as the “positive direction”, and the pressing member 13 The rotation direction of the drive motor 10A and the rotor 12 when the pressure on the flexible tube 6 is strengthened will be described as a “reverse direction”.

  Here, the pressing member 13 is formed of a relatively hard material, and is disposed on the outer side portion of the flexible tube 6 so as to be in contact with a substantially intermediate portion in the length direction thereof. It is necessary to have a contact surface wider than the inner diameter (width) when 6 is pressed and closed. In the present embodiment, using the roller-shaped pressing roller 13A attached by the shaft 15 in a free-wheeling state in which the outer surface of the flexible tube 6 can smoothly roll as the rotor 12 rotates. Yes. As described above, the pressing member 13 is pivotally supported on the rotor 12 and is configured to be slidably contacted while rotating with the flexible tube 6 so that the pressing member 13 is in contact with the flexible tube 6. Friction can be weakened and the durable life of the flexible tube 6 can be extended.

  And the control part 14 requires various information regarding filling (for example, filling amount per hour, time required for filling 1 g of liquid L, timing of opening / closing operation of the liquid flow path 5 by the operating means 8, and the opening / closing operation) 2A, the pressing roller 13A shown in FIG. 2A is flexible by controlling the drive of the drive motor 10A and adjusting the amount of rotation (rotation angle) of the rotor 12 in the forward and reverse directions. The pressing roller 13A shown in FIG. 2B is a flexible tube from a state in which the liquid flow path 5 is fully opened and a large flow rate is obtained (hereinafter referred to as a large flow rate filling state). 6 is sandwiched between the wall member 7 and pressed to allow the liquid flow path 5 to be half-opened at an arbitrary position between the fully open state and the fully closed state (hereinafter referred to as a small flow rate filling state). ) Through the pressure roller shown in FIG. 3A causes the flexible tube 6 to be firmly sandwiched between the wall member 7 and pressed to operate the actuating means 8 so that the liquid channel 5 is fully closed and closed (hereinafter referred to as closed state). Or, conversely, the filling state is switched by operating the actuating means 8 as a filling valve, for example, from the closed state to a high flow rate filling state via a small flow rate filling state. 3 is a cross-sectional view of a main part viewed from the left side of FIG. 2A, FIG. 4 is a cross-sectional view of a main part viewed from above in FIG. 2A, and FIG. 6) is a cross-sectional view of the main part viewed from above in the drawing, and FIG. 6 is a cross-sectional view of the main part viewed from above in FIG. 2C, showing the positional relationship between the pressing roller 13A and the flexible tube 6. FIG.

  Note that the liquid filling apparatus according to the present embodiment includes a known filling amount detection unit (not shown) for detecting the filling amount of the liquid L into the container A. The filling amount detection means may be a so-called weight type or flow rate type. The control unit 14 can control the drive of the drive motor 10A based on the filling amount detected by the filling amount detecting means, and can adjust the rotation amount of the rotor 12.

  In the liquid filling apparatus of the present embodiment configured as described above, the actuating means 8 acts as a filling valve as follows. In addition, the description regarding the effect | action in the liquid filling apparatus of this embodiment and its effect shall serve as the detailed description of the liquid filling method of this invention (same in each embodiment).

  The liquid L supplied from the liquid tank 2 which is a liquid supply part flows into the flexible tube 6 from the pipe 4 as the liquid flow path 5.

  When the container A is supplied immediately below the filling nozzle 3 which is the filling position of the liquid L, the flexible tube 6 is driven by the control of the control unit 14 in the actuating means 8 as shown in FIG. The motor 10A is driven in the reverse direction, and the rotor 12 that is pivotally supported concentrically with the rotation shaft 11 of the drive motor 10A is rotated in the reverse direction by a predetermined amount. The pressing roller 13A that is pivotally supported is oscillated and moved by a predetermined amount from the downstream side of the liquid flow path 5 of the flexible tube 6 to the upstream side (upward in the drawing), as shown in FIG. 6 is pressed to close the liquid flow path 5. Therefore, the liquid L is not sent to the filling nozzle 3 located downstream of the portion where the pressing roller 13A presses the flexible tube 6.

  In this state, under the control of the control unit 14, the drive motor 10 </ b> A is driven to rotate in the forward direction, the rotor 12 is rotated in the forward direction by a predetermined amount, and the pressing roller 13 </ b> A is moved from the upstream side to the downstream side of the liquid flow path 5. 2A and 4B, the pressing roller 13A is flexible as shown in FIG. 2A and FIG. 4 through the small flow rate filling state shown in FIG. 2B and FIG. In a state of non-contact with the sex tube 6. At this time, due to the flexibility of the flexible tube 6, the dent of the flexible tube 6 formed by the pressing of the pressing roller 13 </ b> A is restored, and the liquid flow path 5 composed of the flexible tube 6 is fully opened. The flow rate is filled.

  Therefore, the liquid L flows down in the liquid flow path 5 composed of the flexible tube 6 by the gravity or pressurization of the liquid L, and the so-called large flow in which the total inner diameter amount of the flexible tube 6 flows. Volume filling is performed on the container A from the filling nozzle 3.

  If the filling of the container A is nearly finished, it is desirable to reduce the flow rate of the liquid flow path 5 in order to improve the accuracy of the quantitative filling. Therefore, the drive motor 10A is driven in reverse rotation under the control of the control unit 14, the rotor 12 is rotated in the reverse direction by a predetermined amount, and the pressing roller 13A pivotally supported on one side of the rotor 12 is flexible. By swinging and moving from the downstream side to the upstream side of the liquid flow path 5 of the tube 6 (upward in the drawing), as shown in FIG. 2B and FIG. Fill L little by little.

  When the specified amount of the liquid L is filled in the container A, the drive motor 10A is driven in the reverse direction under the control of the control unit 14, and the rotor 12 is further rotated in the reverse direction by a predetermined amount to rotate. The pressing roller 13A pivotally supported on one side of the child 12 is further swung from the downstream side of the liquid flow path 5 of the flexible tube 6 to the upstream side (upward in the drawing), so that FIG. As shown, the liquid flow path 5 of the flexible tube 6 is closed. As a result, the flow of the liquid L flowing through the liquid flow path 5 is stopped, and the filling is completed.

  As described above, the liquid filling apparatus according to the present embodiment performs the filling valve operation by opening and closing the liquid flow path 5 by rotating the rotor 12 in the forward / reverse direction by the forward / reverse rotation drive of the drive motor 10A. Therefore, the variation in the time for opening and closing the liquid flow path 5 is extremely small as compared with the conventional filling apparatus using the direct acting pressing member of the air actuator. Moreover, since the variation of the operation stroke of the pressing member 13 is reduced, the filling accuracy is greatly improved. In particular, in the case of a liquid filling apparatus in which a plurality of filling nozzles 3 are arranged and a plurality of containers A supplied at the same time are configured to fill a predetermined amount at a time, It is easy to make the filling amount constant.

  In addition, it is not necessary to provide an air actuator as in the above-described conventional filling device, and the filling operation can be performed in a clean environment with less noise and no exhaust than the switching (driving) sound of the air actuator.

  Note that the liquid filling apparatus of the present embodiment manages various settings necessary for filling in the control unit 14. Regarding the drive of the drive motor 10A, a setting that allows filling under optimum filling conditions is selected in consideration of characteristics such as the viscosity of the liquid L to be filled, filling amount, flow rate, rotational operation speed of the pressing member, and the like. Program it like so. Accordingly, by inputting necessary information from the operation input means provided in the liquid filling device, the drive motor 10A is driven in accordance with each condition, and the liquid flow path 5 is opened and closed. It is possible to switch.

For example, when the drive motor 10A is a stepping motor as in this embodiment, the number of drive steps required for switching between the closed state and the small capacity filling state, the small capacity filling state to the large capacity, depending on the type of the liquid L the number of drive steps required to switch or the like between the filling state leave management in the control unit 14, by referring to the number of steps or the like, the drive motor 10A in accordance with the drive timing of the drive motor 10A to be managed by the control unit 14 positive Control for reverse rotation is conceivable. The liquid filling apparatus according to the present embodiment that electrically controls the operating means 8 as a filling valve can set the flow rate very finely and steplessly. It is also possible to reduce the final flow rate at the time of filling to a minute flow rate, and therefore, it is possible to perform quantitative filling with extremely high accuracy.

  And, by opening and closing the liquid flow path 5 without using a mechanism such as an air actuator and using electric control, it is possible to input necessary information from an operation input means provided in the liquid filling device. Because it becomes possible to change the setting, it can be easily adjusted by anyone regardless of the experience and skill of the operator. In the case of the liquid filling apparatus in which a plurality of filling nozzles 3 are arranged as described above and a plurality of containers A supplied at the same time are configured to fill a predetermined amount at a time, each filling is performed. By collectively managing the control unit 14 that controls the operation unit 8 corresponding to the nozzle 3, it is possible to change settings and the like more easily.

  Further, when the operation data (log) is collected by the control unit 14, it is possible to find an abnormality and leave a record as numerical data, which can be used for failure determination during maintenance.

  Further, after filling, the liquid filling apparatus of the present embodiment presses the flexible tube 6 with the pressing roller 13A to close the liquid flow path 5 as shown in FIG. As shown in FIG. 7B, the drive motor 10A is further driven in reverse rotation under the control of the control unit 14, and the rotor 12 is rotated in the reverse direction by a predetermined amount as shown by the dimension X in FIG. The pressing roller 13A pivotally supported on one side of the rotor 12 is further swung from the downstream side to the upstream side of the liquid flow path 5 of the flexible tube 6 (upward in the drawing), whereby the pressing roller 13A. Absorbs a small amount of liquid L remaining in the liquid flow path 5 on the downstream side of the portion pressing the flexible tube 6 to the upstream side, a concave meniscus is formed at the tip of the filling nozzle 3, and the surface tension is increased. As the liquid level shape is strong against the dripping that has acted, the dripping after filling It can be prevented fouling like container or the like during to fill prevented (suck-back effect).

  In relation to this, a filling nozzle tip liquid detecting means such as a small camera for detecting a droplet at the tip of the filling nozzle 3 is disposed in the vicinity of the filling nozzle 3, and the filling nozzle 3 is detected by the filling nozzle tip liquid detecting means. Only when a droplet is detected at the tip of the rotor, in order to obtain the suck back effect, the drive motor 10A is driven by the control of the control unit 14, and the rotor 12 is rotated in the reverse direction by a predetermined amount, thereby rotating the rotor. The pressing roller 13A that is pivotally supported on one side of 12 may be further oscillated from the downstream side to the upstream side.

  When the filling nozzle tip liquid detecting means is arranged in this way, the drive motor 10A of the actuating means 8 may be operated only when the liquid dripping prevention process is necessary. The time required for filling the liquid amount with respect to A can be shortened, and the efficiency of the filling work can be improved.

  In the present invention, even if any of the above-described methods is adopted as means for preventing liquid dripping, the operation of sucking up the liquid droplet at the tip of the filling nozzle can be executed by one actuator (drive motor). .

  In the present embodiment, a disc-like pressing roller 13A that is rotatably supported by the rotor 12 is used as the pressing member 13. However, the pressing member 13 is not limited thereto, and for example, the disc-shaped pressing roller 13A. Instead of the pressing roller 13A, as shown in FIG. 8, a substantially triangular rice ball-shaped pressing roller 13B in which a portion in contact with the flexible tube 6 is in an arc shape may be used.

  In the present embodiment, the rotor 12 may be provided with a plurality of pressing members 13 that vary the pressing force on the flexible tube 6 as shown in FIGS. 8 and 9. FIG. 8 shows the rotor 12 provided with a circular presser roller 13A and a substantially triangular rice ball-shaped presser roller 13B. In FIG. 9, each axis from the rotary shaft 11 is changed so that the maximum pressing force when the liquid flow path 5 by the flexible tube 6 is closed is divided into three equal positions on the outer periphery of the rotor 12. In this example, three types of large, medium, and small pressure rollers 13Aa, 13Ab, and 13Ac are arranged with the same distance up to 15 and different diameters of the pressure roller 13A itself. As described above, if a plurality of pressing members 13 for varying the pressing force on the flexible tube 6 are provided on the rotor 12, the characteristics of the fluid and the flexibility to be used can be changed by changing the phase of the drive motor 10A. An appropriate pressing roller 13A can be easily selected and used according to the diameter of the conductive tube 6 and the like. Then, by appropriately selecting the pressing member 13 having an optimal shape and performing the filling process while adjusting the pressing and non-pressing of the flexible tube 6, it is possible to prevent the occurrence of dripping and improve the accuracy of filling control at a predetermined flow rate. Needless to say, it can be performed more strictly. In addition, as a mode in which a plurality of restraining members 13 that make the pressing force against the flexible tube 6 different from the rotor 12 are arranged, the diameters of the pressing rollers 13A themselves are made equal to each other from the rotating shaft. A mode in which a plurality of pressing rollers 13A are arranged at different distances to the shaft 15 may be used.

  Furthermore, it is good also as a structure which serves as the rotor 12 and the pressing member 13 together. That is, an arc-shaped wall portion may be formed on the outer periphery of the rotor 12 and the arc-shaped wall portion may be used as the pressing member 13.

Second Embodiment
In the liquid filling apparatus of the present embodiment shown in FIGS. 10 to 12, the actuating means 8 includes a groove formed in the pressing member 13 with the flexible tube 6 positioned between the pressing member 13 and the wall member 7. The flow rate of the liquid can be adjusted by sandwiching and pressing between the narrow constrictions.

  The characteristic part different from the first embodiment will be described. The pressing member 13 attached to the rotor 12 of this embodiment has a pressing surface 16 for holding the flexible tube 6 formed on the outer periphery. The pressure member 13C is used. As shown in FIG. 10 (a), the pressing surface 16 formed on the outer periphery gradually narrows the gap between the rotor 12 by rotating the rotor 12 in the reverse direction by the reverse rotation of the drive motor 10A. The flexible tube 6 can be strongly narrowed between the pressing surfaces 16 to close the liquid flow path 5 (see FIG. 11), and conversely, as shown in FIG. 10B, the drive motor 10A is driven to rotate forward. As a result of the rotation of the rotor 12 in the forward direction, the gap between the rotors gradually increases, and the liquid channel 5 can be opened by releasing the pressing of the flexible tube 6 (see FIG. 12). Is formed. 11 is a cross-sectional view of the main part viewed from above in FIG. 10A, and FIG. 12 is a cross-sectional view of the main part viewed from above in FIG. 10B. It is a reference figure which shows the positional relationship with the flexible tube 6. FIG.

  In the liquid filling apparatus of the present embodiment configured as described above, the control unit 14 controls the drive of the drive motor 10A, so that the operation unit 8 acts as a filling valve in the same manner as in the first embodiment. The same effect can be obtained.

<Third Embodiment>
The liquid filling apparatus of this embodiment shown in FIGS. 13 to 17 is crushed between the wall member 7 by the pressing of the pressing roller 13A, extends in the radial direction perpendicular to the pressing direction by the pressing roller 13A, and has a flat cross-sectional shape. The flexible member is provided with a restoring member 21 for adjusting the shape to the original circular cross-section by contacting the flexible tube from the direction of widening by pressing. 14 is a cross-sectional view of the main part viewed from above in FIG. 13A, and FIG. 15 is a cross-sectional view of the main part viewed from above in FIG. 13B. It is a reference figure which shows the positional relationship with the sex tube.

  Hereinafter, the characteristic part different from the first embodiment will be described. The restoring member 21 is attached to the downstream side of the pressing roller 13A when the rotor 12 rotates in the forward direction. The roller 12 is formed as a roller-like restoring roller 21A attached by a shaft 22 in an idle state in which the outer surface of the flexible tube 2 can smoothly roll as the child 12 rotates.

  The outer peripheral surface of the restoring roller 21 </ b> A facing the flexible tube 6 is flexible so as to abut the flat radial side portion of the flexible tube 6 to adjust the shape of the flexible tube 6. A round groove 23 is formed following the cross-sectional shape of the conductive tube 6.

  In the liquid filling apparatus of the present embodiment configured as described above, the actuating means 8 acts as the filling valve described above, and also acts as a shape restoration assisting mechanism for the flexible tube 6 as follows.

  In the present embodiment, as shown in FIG. 13 (a), when the liquid flow path 5 composed of the flexible tube 6 is in a closed state and filling is completed, the next container A is filled with a predetermined amount. Furthermore, as shown in FIG. 13 (b), the drive motor 10A is driven to rotate in the forward direction under the control of the control unit 14, and the rotor 12 is rotated in the forward direction by a predetermined amount. The flow rate is filled.

  In the liquid filling apparatus of the present embodiment, when the pressing roller 13A is released from contact with the flexible tube 6 to be in a large flow rate filling state, the pressing roller 13A is placed directly downstream of the pressing roller 13A instead of being inserted. The control motor 14 drives the drive motor 10A to rotate forward so that the restoration roller 21A provided is engaged with the flexible tube 6, and rotates the rotor 12 in the forward direction. At that time, the restoring roller 21A abuts against the flexible tube 6 from the direction of widening when it is crushed by the pressing roller 13A in accordance with the rotation of the rotor 12, Finally, as shown in FIGS. 13B and 15, the flexible tube 6 acts so as to be pushed into a circular groove 23 formed on the outer peripheral surface of the restoring roller 21 </ b> A.

  As a result, the flexible tube 6 that has been pressed and flattened by the pressing roller 13A is brought into contact with the restoring roller 21A together with the restoring force due to flexibility, which is its own characteristic, thereby assisting its restoration. By correcting the cross-sectional shape, the durability life can be improved as much as possible. Then, the flexible tube 6 whose cross-sectional shape is restored and corrected in this way can suppress variation in the filling flow rate per hour due to crushing, thereby making quantitative filling more reliable. be able to.

  In particular, by providing the restoring member 21 of the flexible tube 6 as in this embodiment, the large-diameter flexible tube 6 that is difficult to restore after being crushed by being pressed by the pressing member 13 can be relieved. It becomes available. That is, the flow rate of the flexible tube 6 having a large diameter is stabilized by the shape restoration being assisted by the restoration member 21.

  In the restoring roller 21A of the present embodiment, a round groove 23 that follows the cross-sectional shape of the flexible tube 6 is formed in an annular shape, and the inner wall of the round groove 23 is in contact with the side portion of the flexible tube 6. However, the configuration of the restoring member 21 is not limited to this. For example, a pair of guide members that are in contact with and guide the side of the flexible tube 6 as shown in FIGS. 16 and 17. The restoring plate 21 </ b> B that is a plate-like member provided with the guide surface 24 may be used.

<Fourth embodiment>
The liquid filling apparatus of the present embodiment shown in FIGS. 18 and 19 additionally fills the insufficient amount of liquid L when the detection result by the filling amount detection means after filling indicates insufficient supply of the liquid L, and fills the amount after filling. When the detection result by the detection means indicates that the liquid L is overfilled, the liquid L is aspirated to be filled in a fixed amount.

  This embodiment will be described with respect to features different from those of the first embodiment described above. The liquid filling apparatus of the present embodiment is a nozzle insertion mechanism that positions the tip of the filling nozzle in the liquid L filled in the container A. A nozzle raising / lowering mechanism capable of bringing the filling nozzle 2 into and out of contact with the container is provided. The nozzle insertion mechanism may be a table elevating mechanism in which the table 1 on which the container A is placed can be brought into contact with and separated from the filling nozzle 3. These nozzle insertion mechanisms have a known configuration, and in this embodiment, driving is controlled by the control unit 14.

  Further, the rotor 12 is configured as a pair of pressing members 13 such that the flexible tube 6 can be sandwiched between the wall member 7 and the liquid flow path 5 can be closed by the rotation of the rotor 12. The pressing rollers 13A and 13B are attached next to each other. Furthermore, the pair of pressing rollers 13A and 13B in the present embodiment have the same dimensions, and are disposed adjacent to each other so as to be rotatable by a shaft 15 provided at an equal distance from the rotating shaft 11 of the rotor 12. Has been.

  And the liquid filling apparatus of the present embodiment according to the present invention configured as described above operates as follows.

  In the present embodiment, after the filling is completed, when the detection result by the unillustrated filling amount detection means indicates that the supply of the liquid L is insufficient, the insufficient amount of liquid L is additionally filled, and conversely by the filling amount detection means. When the detection result indicates that the liquid L is overfilled, the control unit 14 controls the drive of the drive motor 10A so that the excess liquid L is sucked and collected.

  Specifically, first, of the pair of pressing rollers 13A and 13B, only one pressing roller 13A that contacts and separates from the flexible tube 6 at a position away from the filling nozzle 3 is used to perform a normal filling operation. . That is, the control unit 14 uses one pressing roller 13A, presses the flexible tube 6 between the wall member 7 and adjusts the opening / closing amount of the liquid flow path 5, and supplies the liquid L to the container A. Thus, the drive motor 10A is controlled to be driven in the forward rotation, and the rotor 12 is rotated in the forward direction by a predetermined amount.

  Then, when the predetermined filling is completed, the drive motor 10A is driven in reverse rotation under the control of the control unit 14 in the operating means 8, and the rotor 12 is rotated in the reverse direction by a predetermined amount. As shown in 19 (a), one pressing roller 13A closes the liquid flow path 5 of the flexible tube 6, and in this state, the filling amount detection means detects whether the filling amount is excessive or insufficient.

  When the detection result indicates that the supply of the liquid L is insufficient, the control unit 14 rotates the drive motor 10A in the forward rotation under the control of the control unit 14 in the operating means 8, as shown in FIG. The child 12 is rotated in the positive direction by a predetermined amount to be in a small flow rate filling state. When the insufficient supply is completed, the drive motor 10A is driven in reverse rotation under the control of the control unit 14 to rotate the rotor 12 in the reverse direction by a predetermined amount. The filling is completed in the closed state as shown in FIG.

  On the other hand, as shown in FIG. 19A, when the filling amount of the container A is large and the detection result of the filling amount detecting means indicates the overfilling of the liquid L, as shown in FIG. While the liquid flow path 5 of the flexible tube 6 is closed, the filling nozzle lifting mechanism (not shown) is driven and the filling nozzle 3 is lowered so that the tip of the container A is filled. In the liquid L.

  In this state, the controller 14 drives the drive motor 10A in the reverse rotation, and the other pressing roller 13B that contacts and separates from the flexible tube 6 at a position close to the filling nozzle 3 as shown in FIG. Thus, while the flexible tube 6 is pressed between the wall member 7 and the liquid channel 5 between the position where one pressing roller 13A is closed to the filling nozzle 3, the container A is applied by negative pressure. Then, the rotor 12 is controlled to rotate in the reverse direction so that the excessive liquid L is sucked up and collected.

  Thereafter, as shown in FIG. 19D, the filling nozzle lifting mechanism is driven to raise the filling nozzle 3 to complete the quantitative filling.

  Then, at the time of the next filling, from the state where the pair of pressing rollers 13A and 13B are pressing the flexible tube 6, the drive motor 10A is driven in the normal rotation by the control of the control unit 14, and the rotor 12 is moved. A predetermined amount is rotated in the forward direction, and after passing through a closed state and a small flow rate filling state by only one pressing roller 13A, a high flow rate filling state is obtained, and a predetermined amount of filling is executed.

  As described above, according to the liquid filling apparatus of the present embodiment, the quantitative filling is further performed by executing the feedback control for performing a small amount of additional filling and recovery of the liquid L based on the filling amount detected by the filling amount detection unit. It can be certain.

  In the present embodiment, when the detection result of the filling amount detection means indicates that the liquid L is overfilled, the filling nozzle lifting mechanism is driven again and the filling nozzle 3 is lowered to fill the tip of the container A. In the case of a filling device that is controlled so as to always start the filling after inserting the tip of the filling nozzle 3 to the vicinity of the bottom of the container A, for example. Shall follow in that order.

<Fifth Embodiment>
The liquid filling apparatus of this embodiment shown in FIG. 20 uses a direct acting electric actuator 10B as the driving means 10 instead of the driving motor 10A of the above-described embodiment.

  This embodiment will be described with respect to features different from those of the first embodiment described above. In the liquid filling apparatus of this embodiment, the rotor 12 on which the pressing roller 13A is disposed is connected to the support 9 by a shaft 26. A connecting member 27 that is pivotally supported so as to be able to rotate in the reverse direction and connects the tip of the shaft 28 that moves forward and backward by driving the direct acting electric actuator 10B to a position that is largely separated from the pressing roller 13A around the shaft 26. Is arranged. The connecting member 27 is rotatably connected to the rotor 12 by a rotating shaft 31. Further, the direct-acting electric actuator 10B connects the connecting member 27 connected to the tip of the shaft 28 to the rotating shaft 31 formed on the rotor 12, and the rotor 12 becomes normal as the shaft 28 moves forward and backward. The main body 29 is disposed so as to be swingable by a shaft 30 with respect to the support 9 so as to rotate in the reverse direction. Then, the control unit 14 controls driving of the direct acting actuator 10B. Also in the present embodiment, following the above-described embodiments, the forward / backward direction of the direct-acting electric actuator 10B and the rotation direction of the rotor 12 when the pressure of the pressing member 13 on the flexible tube 6 is weakened are expressed as “ The forward / backward direction of the direct-acting electric actuator 10B and the rotational direction of the rotor 12 when strengthening the pressing of the pressing member 13 against the flexible tube 6 are conceptualized as “reverse direction”. ,explain.

  In the liquid filling apparatus of the present embodiment configured as described above, the control unit 14 controls the driving of the direct acting electric actuator 10B and extends the shaft 28 (in the reverse direction) as shown in FIG. ), The connecting member 27 acts to rotate the rotor 12 in the reverse direction while rotating about the rotation shaft 27a. Then, the pressing roller 13 </ b> A is swung from the downstream side of the liquid flow path 5 of the flexible tube 6 to the upstream side (upward in the drawing) by the rotation of the rotor 12, so that the pressing roller for the flexible tube 6 is moved. The contact and pressing of 13A can be strengthened.

  Further, when the control unit 14 controls the driving of the direct acting electric actuator 10B and shortens the shaft 28 (moves in the forward direction) as shown in FIG. 20B, the connecting member 27 itself rotates. While rotating about the shaft 31, the rotor 12 is pulled and rotated in the forward direction. Then, the pressing of the pressing roller 13A against the flexible tube 6 is weakened by swinging the pressing roller 13A from the upstream side to the downstream side of the liquid flow path 5 (downward in the drawing) by the rotation of the rotor 12. Or non-contact.

  Therefore, also in the liquid filling apparatus of the present embodiment, the rotation amount of the rotor 12 in the forward / reverse direction is adjusted and rotated by controlling the drive of the direct acting electric actuator 10B as the driving unit 10 by the control unit 14. By changing the pressing state of the pressing member 13 provided on the child 12 against the flexible tube 6, the flow rate of the liquid flowing in the liquid flow path 5 is adjusted, and the same effects as those of the above-described embodiments can be obtained. it can.

  The present invention is not limited to the embodiments described above, and various modifications can be made as necessary.

  For example, as shown in FIG. 21, the wall member 7 in the liquid filling apparatus of the present invention has a curved surface region 7A having an arcuate cross section along the rotation locus of the pressing member 13 on the contact surface of the flexible tube 6. Alternatively, the flexible tube 6 may be sandwiched between the curved surface region 7A and the pressing member 13. By setting it as such a structure, the liquid flow path 5 can be obstruct | occluded with a wide contact surface, and a sealing effect can be improved more. Further, when the wall member 7 is formed in this way, a stroke when the pressing member 13 moves in the forward and reverse directions in accordance with the rotation of the rotor 12 while the flexible tube 6 is pressed is increased. (Refer to FIG. 21A to FIG. 21C) As described above, the amount of the liquid droplets at the tip of the filling nozzle 3 and the excessive liquid L sucked up, and the additional amount of the insufficient liquid added are increased. It becomes possible.

  Such a configuration of the wall member 7 is used when the rotor 12 is provided with only one pressing roller 13A as in the embodiment shown in FIG. 2, FIG. 7, or FIG. The present invention can be applied not only to the case where the pressing member 13 is also used, but also to the case where a pair of pressing rollers 13A and 13B are used as the pressing member 13 as in the embodiment shown in FIG.

  Further, in order to ensure a large stroke when the pressing member 13 moves in the forward / reverse direction while pressing the flexible tube 6 in accordance with the rotation of the rotor 12, at least the wall member 7 is flexible. It is also possible to form the contact surface of the flexible tube 6 with an elastic member so that the corresponding contact surface is elastically deformed into a concave shape depending on the degree of pressing of the flexible tube 6.

DESCRIPTION OF SYMBOLS 1 Table 2 Tank 3 Filling nozzle 4 Piping 5 Liquid flow path 6 Flexible tube 7 Wall member 8 Actuating means 9 Support body 10 Drive means 10A Drive motor 10B Direct acting electric actuator 11 Rotating shaft 12 Rotor 13 Holding member 13A Holding Roller 13B Pressing roller 13C Clamping member 14 Control unit 15 Shaft 16 Pressing surface 21 Restoring member 21A Restoring roller 21B Restoring plate 22 Shaft 23 Round groove 24 Guide surface 25 Plate-like member 26 Shaft 27 Connecting member 28 Shaft 29 Main body 30 Shaft 31 Rotation Axis A Container L Liquid

Claims (5)

A tank for storing a liquid to be filled, a filling nozzle for injecting the liquid into a container, a liquid flow path disposed between the tank and the filling nozzle, and having a fixed section made of a flexible tube, A driving means disposed on a support; a rotor that is rotatable forward and backward by driving the driving means; and the flexible tube is pressed by the rotation of the rotor; An operating means that includes a pressing member whose opening and closing amount can be adjusted, and that opens and closes the liquid flow path; a filling amount detection means that detects a filling amount of liquid in the container; and a detection result of the filling amount detection means And a controller for controlling the driving of the driving means based on the above and adjusting the amount of rotation of the rotor to open and close the liquid flow path,
A nozzle insertion mechanism for positioning the tip of the filling nozzle in the liquid filled in the container,
The rotor is provided with a pair of pressing members capable of pressing the flexible tube by the rotation of the rotor and closing the liquid flow path,
The controller is
If supply shortage is detected by the detection result of the filling amount detection means,
Of the pair of pressing members, the flexible tube is pressed by one pressing member that contacts and separates from the flexible tube at a position away from the filling nozzle, and the opening and closing amount of the liquid flow path is adjusted, Controlling the drive of the drive means to additionally fill the container with a deficient liquid;
If overfilling is detected by the detection result of the filling amount detection means,
With the liquid passage blocked by the one pressing member, the nozzle insertion mechanism is driven to position the tip of the filling nozzle in the liquid filled in the container, and the filling of the pair of pressing members is performed. The liquid flow between the position where the one pressing member is closed and the filling nozzle is pressed by the other pressing member that contacts and separates the flexible tube at a position close to the nozzle. as recovered by negative pressure a predetermined amount of liquid from the container into the road, and controlling the drive of said drive means the liquid-filled device. The rotor is provided with a restoring member that comes into contact with the flexible tube from the direction of widening when pressed by the pressing member and restores the cross-sectional shape to the state before being pressed. And
The controller rotates the rotor so that the restoring member engages with the flexible tube instead of the pressing member when releasing the contact of the pressing member with the flexible tube of the pressing member. The liquid filling apparatus according to claim 1, wherein the driving of the driving unit is controlled as described above. A tank for storing a liquid to be filled, a filling nozzle for injecting the liquid into a container, a liquid flow path disposed between the tank and the filling nozzle, and having a fixed section made of a flexible tube, A driving means disposed on a support; a rotor that is rotatable forward and backward by driving the driving means; and the flexible tube is pressed by the rotation of the rotor; An operating means that includes a pressing member whose opening and closing amount can be adjusted, and that opens and closes the liquid flow path; a filling amount detection means that detects a filling amount of liquid in the container; and a detection result of the filling amount detection means And a controller for controlling the driving of the driving means based on the above and adjusting the amount of rotation of the rotor to open and close the liquid flow path,
The rotor is provided with a restoring member that comes into contact with the flexible tube from the direction of widening when pressed by the pressing member and restores the cross-sectional shape to the state before being pressed. And
The controller rotates the rotor so that the restoring member engages with the flexible tube instead of the pressing member when releasing the contact of the pressing member with the flexible tube of the pressing member. controlling the driving of said drive means the liquid-filled device you characterized as. A nozzle tip liquid detection means capable of detecting the presence or absence of droplets exposed from the tip of the filling nozzle,
The control unit continues to be flexible by a pressing member that presses the flexible tube to close the liquid flow path when a droplet is detected at the tip of the filling nozzle by the filling nozzle tip liquid detection means. While the tube is pressed to close the liquid flow path, the rotor is rotated so that the pressing position of the flexible tube is moved to the upstream side of the liquid flow path, and the liquid droplets remaining at the tip of the nozzle are flowed. The liquid filling apparatus according to any one of claims 1 to 3, wherein the driving of the driving unit is controlled so as to be sucked into the path. A flexible tube arranged so as to form the liquid flow path is fixed in a predetermined section of the liquid flow path arranged between the tank for storing the liquid to be filled and the filling nozzle by driving the electric drive means. A liquid filling method that performs constant filling while adjusting the flow rate of the liquid flowing through the liquid flow path by pressing the rotor by turning the rotor that is reversely rotatable ,
Performing quantitative filling by a plurality of stages of filling with different flow rates, and setting the time required for opening and closing operation of the liquid flow path when switching each stage of changing the flow rate according to the type of the liquid, the opening and closing operation The liquid filling method is characterized in that the driving of the electric drive means is controlled in consideration of the time required for the operation.

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