JPH0684163B2 - Filling machine - Google Patents

Description

Detailed Description of the Invention

[Field of Industrial Application] The present invention relates to a filling machine for uniformly filling a fluid in a container. [Prior Art] Generally, when filling a fluid such as a cosmetic cream into a container, it is necessary to use a method different from the method of filling a liquid. That is, some fluids exhibit high viscosity, spinnability, etc., and when filling these into a rigid container, it is necessary to continuously change the filling amount and to change the relative position between the nozzle and the container. There is. This is because when a low-fluidity fluid is filled at a constant flow rate, the filling proceeds before the fluid diffuses to the bottom of the container, so that air is mixed into the fluid. Also, when filling is performed with the height of the nozzle kept constant, the progress of diffusion is slow and it takes time to complete the filling, but at the beginning of filling, the nozzle is lowered to the vicinity of the bottom part, and the filling progresses. If the temperature is raised, the fluid can be forcibly diffused and the filling efficiency can be improved. As a filling machine having such a function, those described in JP-A-56-26602 and JP-A-56-24402 are conventionally known. First, as described in the former publication, as shown in FIG. 18, the fluid 300 is discharged from a nozzle 301 and filled in a container 302 arranged below the nozzle 301.
The fluid 300 is pressurized by a pressure device 303 including a piston and a cylinder. A rotary valve 304 is arranged between the pressurizing device 303 and the nozzle 301, so that the cylinder can be selectively communicated with the hopper 305 side or the nozzle 301 side. The pressurizing device 303 is operated by a cam plate 307 and a crank mechanism 308 driven by the cam plate 307, and its operation stroke and operation timing are determined by the shape of the cam plate 307. Crank mechanism 30
Reference numeral 8 constitutes an emission control mechanism 306. On the other hand, in the nozzle 301, a piston 309 for smoothing the "break" at the end of filling the fluid 50 is slidably arranged, and a bell crank mechanism 310 for operating the piston 309 is provided. Has been. Further, the filling machine shown in FIG. 19 is described in Japanese Utility Model Laid-Open No. 56-24402, which is provided with a nozzle position control device 311 for raising and lowering the nozzle 301, and a cam. The push rod 312 moved up and down by the plate 307 is configured to transmit the stress to the nozzle 301 side. Although the respective publications have been described above, in brief, in these publications, the supply amount of the fluid 300 per unit time is controlled based on the cam profile preset on the cam plate 307, and the height of the nozzle 301 is increased. It controls the quality. [Problems to be Solved by the Invention] Generally, a filling machine is used by appropriately replacing various fluids 300, but in the conventional filling machine described above, the filling operation is limited to the setting content of the cam plate 307. Therefore, there is a drawback that the filling is difficult depending on the physical properties of the fluid 300 to be filled and the range of use is limited. That is, the supply amount of the fluid 300 per unit time needs to be delicately set according to the physical properties of the fluid 300, and the pulling speed of the nozzle 301 also needs to be set strictly according to the physical properties and the container shape. It is necessary, but in the conventional one, two cam plates 307.3 each time the fluid is changed.
You have to replace each 07 with one that has compatible characteristics,
In addition, the rotational speed of the motor for driving the cam plate must be adjusted each time, so that there is a problem that the trouble cannot be endured. The present invention has been made in view of the above points, and it is an object of the present invention to provide a filling machine that can set the supply amount of a fluid per unit time and the pulling rate of a nozzle arbitrarily and extremely easily. Subject. [Means for Solving the Problems] The present invention relates to a nozzle 1 for filling a fluid into a container 10,
A nozzle position control mechanism 2 for changing the height of the nozzle 1
And a filling amount control mechanism 3 for varying the filling amount of the fluid filled from the nozzle 1 into the container 10 per unit time. That is, the nozzle 1 discharges the fluid delivered from the filling pump P to fill the inside of the container 10, and the nozzle position control mechanism 2 is driven by a hydraulic pump 9 to move the nozzle 1 up and down. First hydraulic cylinder 7 supported by
And a first servo valve B1 for varying the amount of oil to be supplied from the hydraulic pump 9 to the first hydraulic cylinder 7.
And are provided. Further, the filling amount control mechanism 3 is driven by the hydraulic pump 9 to operate the filling pump P, whereby
A second hydraulic cylinder 8 for varying the amount of fluid discharged from the nozzle 1, and a hydraulic pump 9 for the second hydraulic cylinder 8.
And a second servo valve B2 for varying the amount of oil to be supplied from. Furthermore, in addition to the nozzle position control mechanism 2 and the filling amount control mechanism 3, an operation signal generator 4 for controlling the operation of each of the servo valves B1 and B2 and an operation pattern of each of the servo valves B1 and B2 are provided. An operation pattern storage unit 5 for storing the operation pattern and an operation pattern selection unit 6 for arbitrarily selecting the operation pattern according to the type and property of the container to be filled and sending the operation pattern to the operation signal generation unit 4 are provided. It was used as a filling machine. The servo valves B1 and B2 may be of digital type or analog type. In the case of a digital servo valve, the stepping motor M1 is driven and controlled by pulse signals as the servo motor used to open and close the valve.
M2 is used. In this case, the operation signal generator 4 serves as a pulse generator that controls the number of pulses to be supplied to the stepping motors M1 and M2 and the operation timing thereof. In the case of an analog type servo valve, a two-phase servomotor or the like is used as the servomotor, and in this case, the operation signal generating section 4 becomes an analog signal generating section. [Operation] The servo valves B1 and B2 operate based on the operation signal from the operation signal generator 4 to control the moving amount and moving speed of the hydraulic cylinders 7 and 8. This control is performed based on the data stored in advance in the operation pattern storage unit 5. This data can be individually set to an arbitrary value, but can be collectively changed by the operation pattern selection unit 6. The data are the physical properties of the fluid to be filled and the shape of the container 10,
Based on parameters such as the height of the mouth, it is selected so that the filling is completed most quickly without bubbles in the filling fluid. Nozzle position control mechanism 2 and filling amount control mechanism 3
On the basis of this data, while adjusting the height of the nozzle 1 continuously, the filling amount of the fluid discharged from the nozzle 1 per unit time is adjusted. In this way, the operation amount and operation speed of the hydraulic cylinders 7 and 8 can be arbitrarily and easily changed, and the content of the filling operation can be changed quickly. [Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 2 to 17. <Mechanical Structure of Filling Machine> This filling machine has a structure in which a nozzle 1 and a filling amount control mechanism 3 are supported by a nozzle position control mechanism 2 so as to be vertically movable. First, the nozzle position control mechanism 2 will be described.
As shown in FIG. 2, a hydraulic pump 9 is provided on the chassis 11, and is driven by the hydraulic pressure from the hydraulic pump 9 to support the nozzle 1 and the filling amount control mechanism 3 so as to be vertically movable. A first hydraulic cylinder 7 is provided, and a container mounting device 12 is provided above the hydraulic pump 9. The hydraulic cylinder 7 has a digital solenoid valve B1 which is operated by a first stepping motor M1 as a first digital servo valve to adjust the amount of oil from the hydraulic pump 9. The stepping motor M1 has a pulse signal. The hydraulic switching valve in the digital solenoid valve B1 is slid by its rotation, and the opening degree and opening speed of the valve are controlled. As a result, the stroke amount and speed of the hydraulic cylinder 7 are controlled to control the height position of the nozzle 1 and the speed of vertical movement. Since the height position of the nozzle 1 is determined by the stroke amount of the hydraulic cylinder 7,
In order to indirectly detect the height position of the nozzle 1, a first linear pulse encoder R1 that detects the stroke amount of the hydraulic cylinder 7 and outputs it as an electric amount is provided in this hydraulic cylinder 7. Further, the hydraulic cylinder 7 is provided with a proximity switch ES1 (lower limit sensor) which is turned on by the rod when the nozzle 1 is lowered again. The first hydraulic cylinder 7 is supported so that it can be manually moved up and down by the rotation of the handle 13, which allows fine adjustment of the height position of the nozzle 1. The container supporting device 12 includes a container rotating mechanism that rotatably supports the container 10. As shown in FIG. 3, the container rotating mechanism includes a chuck mechanism 22 connected to the upper end of a hollow shaft 21. It is rotated by the air motor 25 via the flat gears 23 and 24, and the chuck mechanism 22 is driven vertically and horizontally by the air cylinder 26 that is operated by the compressed air sent from inside the hollow shaft 21. Chuck claw 27 /
A container holder 28 accommodating the container 10 is held by the chuck claws 27. Next, the nozzle portion will be described. As shown in FIG. 2, the nozzle 1 is vertically installed with the nozzle opening 31 facing the opening portion of the container 10 held by the container mounting device 12. While the filling pump P is connected to the upper end,
A hopper 32 that stores a fluid is provided on the filling pump P, and the nozzle 1, the filling pump P, and the hopper 32 are attached to a base 33 together with the filling amount control mechanism 3, and the base is
33 is supported by the hydraulic cylinder 7. The applicant has previously proposed this nozzle 1 (Japanese Patent Publication No. 58-22402), and as shown in FIG.
1.Inject a filling pipe 42 into 1 and attach the tip of this filling pipe 42 to the nozzle port 3
1, the filling pump P is provided in the nozzle body 41.
An introduction path for introducing the fluid discharged from the inside into the injection pipe 42
43 is formed, an air cylinder 44 is provided, and a spindle 45 vertically driven by the air cylinder 44 is inserted into the injection pipe 42, and the tip of the spindle 45 is moved by the vertical movement of the spindle 45. The nozzle opening 31 is designed to be opened and closed. The filling pump P is, as shown in FIG.
A rotary cylinder 52 that is rotatably driven via a rack and a pinion (not shown) is provided inside, and this rotary cylinder 52 has a notch 53 on one side, and when the rod of the air cylinder 51 advances, the rotary cylinder 52 Notch by rotation of 53
Corresponds to the introduction path 43, and when the rod retracts, the rotation cylinder 52 rotates so that the notch 53 coincides with the outlet of the hopper 32. This state is a proximity switch ES2 (discharging sensor) that is turned on when the rod advances and a proximity switch ES3 (suction sensor) that is turned on when the rod retracts.
Detected by and. Further, a piston 54 is provided in the rotary cylinder 52 so as to be able to slide forward and backward, and when the notch 53 of the rotary cylinder 52 coincides with the outlet of the hopper 32, the piston 54 retreats and flows into the rotary cylinder 52. Inhale your body,
After that, the notch 53 of the rotary cylinder 52 is connected to the introduction path 43 of the nozzle 1.
When it coincides with, the nozzle advances and the fluid is discharged from the nozzle 1. Finally, the filling amount control mechanism 3 will be described. As shown in FIG. 2, a second hydraulic cylinder 8 driven by hydraulic pressure from a hydraulic pump 9 is provided on the base 33,
The rod of the hydraulic cylinder 8 is connected to the piston 54 in the rotary cylinder 52 to drive the piston 54 forward and backward. This hydraulic cylinder 8 has a digital solenoid valve B2 that is operated by a second stepping motor M2 as a second digital servo valve to adjust the amount of oil from the hydraulic pump 9, and this stepping motor M2 has a pulse signal. The hydraulic switching valve in the digital solenoid valve B2 is caused to slide by its rotation, and the opening degree and opening speed of the valve are controlled. As a result, the stroke amount and speed of the hydraulic cylinder 8 are controlled to control the filling pump P.
The suction amount, the push amount, and the speed of the fluid from the hopper 32 are controlled, and as a result, the filling amount and the filling speed of the fluid from the nozzle 1 are controlled. Since the filling amount of the fluid is determined by the stroke amount of the hydraulic cylinder 8, the stroke amount of the hydraulic cylinder 8 is detected and output as an electric amount in order to indirectly detect the filling amount of the fluid. Two linear pulse encodes R2 are provided in this hydraulic cylinder 8. Further, a proximity switch ES4 (filling completion sensor) that is turned on when the rod of the hydraulic cylinder 8 is advanced to the maximum, is provided,
It is designed to detect the completion of filling. By the way, as shown in FIG. 6, the stepping motors M1 and M2 are configured to rotate in the forward and reverse directions with a zero point as a starting point, and the rotation limit of the stepping motor M1 of the nozzle position control mechanism 2 is In +375 to -400 steps, the rotation limit of the stepping motor M2 of the filling amount control mechanism 3 is +370 steps to -390 steps (however, one step angle is 0.36 °). In addition, the nozzle position control mechanism 2
The stroke of the hydraulic cylinder 7 is 000 mm to 195 mm, and the stroke of the hydraulic cylinder 8 of the filling amount control mechanism is 00.0 mm to 9 mm.
It is set to 5.0 mm. The nozzle 1 is not limited to the one that can open and close the nozzle port 31 by the spindle 45 as described above, and a normal nozzle 1 without the spindle 45 may be used depending on the physical properties of the fluid. Further, as the nozzle 1 having the spindle 45 as described above, another type has been proposed by the applicant (Japanese Utility Model Publication No. 59-157741). This is different from the nozzle 1 described immediately above, and is different from FIG.
As shown in (B), the inlet of the introduction path 43 for introducing the fluid 4 is open to the side surface. The type shown in FIG. 7 (B) is applied to a container having a large diameter at the mouth of the container, and a small diameter portion having a diameter larger than the small diameter portion 46 of FIG. 7 (A) is provided at the lower end of the nozzle 1. Nozzle mouth 31 forming 46
A large-diameter tip portion 47 tightly fitted to the small-diameter portion 46 is formed at the lower end of the spindle 45. As described above, when the nozzle 1 having the spindle 45 is used, the disconnection at the end of filling of the fluid becomes good, but when the fluid having high fluidity is used, the hermeticity may be insufficient. Therefore, as another configuration example, as shown in FIG. 8, when the tip of the spindle 45 is formed in a taper shape and the tip portion of the small diameter portion 46 is also formed in a taper shape so as to match the shape, at the time of closing.

As shown in FIG. 8 (B), both can be brought into contact with each other with a tapered surface, and the hermeticity can be remarkably improved. Therefore, even when a liquid such as alcohol having a high permeability into the gap is filled, liquid leakage does not occur. In addition, when filling the container 10 with a small inner diameter of the mouth, it is difficult to align the nozzle 1 with the mouth,
As shown in FIG. 8 (A), a container guide is provided below the nozzle 1.
By arranging 48, centering of both becomes easy. This container guide 48 has a nozzle window in which the nozzle 1 is inscribed.
49 is pierced, and a taper portion 50 is formed which spreads downward from the nozzle window 49. The container guide 48 is an outer pipe 51 that surrounds the nozzle 1.
Is integrally attached to the lower end of the taper part, and the entire nozzle 1 and the filling amount control mechanism 3 are moved downward to move the taper part.
50 functions to guide the mouth of the container 10 toward the center. Further, in the above embodiment, the nozzle 1 and the filling amount control mechanism 3
Is integrally provided and is movably supported up and down by the first hydraulic cylinder 7 of the nozzle position control mechanism 2.
Since the nozzle position control mechanism 2 is for controlling the height position of the nozzle 1, only the nozzle 1 may be supported so as to be vertically movable. In that case, for example, the nozzle 1
Is separated from the filling pump P, and the both are connected by a flexible filling pipe so that only the nozzle 1 is vertically movable and held by the first hydraulic cylinder 7. In this way, since only the lightweight nozzle 1 needs to be supported, the first hydraulic cylinder 7 can be made small. <Hardware for Filling Machine Control> Next, the hardware for controlling the filling machine is shown in FIG. 9 and FIG.
It will be described with reference to FIG. The filling amount control is abbreviated as a filler, and the nozzle height position control is abbreviated as a lifter. This hardware is basically the first and second stepping motors M1 provided in the first and second hydraulic cylinders 7 and 8.
-Pulse generating section 4 as an operation signal generating section for issuing a pulse signal for controlling the operation of M2, operation pattern storage section 5 for storing a filling operation pattern based on the pulse signal from this pulse generating section 4 and its operation An operation pattern selection unit 6 that is arbitrarily selected according to the type of container to be filled with the pattern and the physical properties of the fluid is electrically connected. As shown in FIG. 9, these are composed of a microcomputer and its peripheral circuits, and a central processing unit (CPU) 61 of this microcomputer has a keyboard 62 for inputting a software program in order to select an operation pattern. And a switch group SW for arbitrarily setting numerical values for program-based numerical control, and a read-only memory (ROM) 6 via a bus 63.
4, a random access memory (RAM) 65, a digital input / digital output 66, a keyboard 62 and a digital output 68 for sending a signal of an operation pattern set by the switch group SW to a control card 67,
To read the data signal via the control card 71 into the read-only memory 64 that already stores the basic program of the operation pattern, and to output the status of the filler and lifter as an analog amount and record it in the analog recorder 73. D / A converter 74,
And an LED display device 75 are connected respectively. And digital input and digital output 66
Is connected to the pulse generator 4 that issues a pulse signal to the first and second stepping motors M1 and M2 and the motor driver 76, and is also connected to an interface 77. The interface 77 is connected to each linear pulse encoder R1.・ Pulse signals from R2 and proximity switches ES1 to ES4 are input. Then, the hydraulic cylinders 7 input from the linear pulse encoders R1 and R2
The stroke amounts of 8 are respectively displayed on the digital displays 78 and 79 connected to the controller card 67. Further, the LED display device 75 is composed of a diode drive circuit 80 and a plurality of diodes 81 emitted by the circuit 80. The plurality of diodes 81 indicate the status of the filler and the status of the lifter by sequentially blinking to display them with time. To do first
They are arranged on the control panel 90 shown in FIG. And
The diode 81 indicating the status of the filler uses red, and the diode 81 indicating the status of the lifter uses blue. Instead of the LED display device 75, the CRT display 83 can be used via the interface 82. CRT
If you use the display 83, the operation pattern of the filler and the lifter will be continuously overlaid, or repeated / updated,
Alternatively, the sample hold display can be selected by the keyboard 62, and various commands and data inputs from the keyboard 62 and the switch group SW can be displayed. In this case, the control board 90 is arranged as shown in FIG. Then, as shown in FIG. 10 (A), the control panel 90 includes the switch group SW, the power switch 91, and the digital display 78.
・ 79 、 Conveyor switch 92 ・ 93 、 Oil pump switch
94, the analog recorder 73 for recording the operation content, the start button 95, etc. are arranged. The switch group SW includes, as shown in FIG. 10 (B), a filler digital switch group and a select switch group, and as shown in FIG. 10 (C), a lifter digital switch group and a select switch group. Consists of. These switch groups SW are the read-only memory 64
In the basic program of the operation pattern stored in, the condition setting that should be selected according to the type / property of the container or the fluid is set numerically and stored in the random access memory 65. First, the group of filler digital switches and the group of select switches will be described. The digital switches DS1 to DS6 are used to set the amount of movement of the stepping motor M2, that is, the amount of movement of the second hydraulic cylinder 8 by adjusting the opening degree of the hydraulic switching valve installed inside the digital solenoid valve B2, in digital form. Switches DS1 to DS4
Is a numerical value that sets the amount of movement of the stepping motor M2 when the fluid is flowing. The digital switches DS5 and DS6 are hoppers 32
The amount of movement of the stepping motor M2 when the fluid is sucked into the filling pump P is set. The digital switch DS7 sets the stroke amount of the hydraulic cylinder 8 numerically. The filling amount of the fluid is set by the digital switch DS7, and the filling time can be set by adjusting the opening degree of the hydraulic switching valve by the digital switch DS7 and the digital switches DS1 to DS4. Select switches SS1 to SS8 are for setting the operating speed of the stepping motor M2. With this, the opening / closing speed of the hydraulic switching valve is determined, and the filling speed can be changed in a curve by combination with the digital switches DS1 to DS7, and the operation curves of filling (discharging) and suction can be set arbitrarily. You can Next, the digital switch group and the select switch group for the lifter will be described. Digital switches DS8-DS13, DS15 / DS16 are used to set the amount of movement of stepping motor M1, and select switches SS1-SS19 are stepping motor M1.
It is for setting the operation speed of 1 by a numerical value. The digital switch DS14 is for setting the rising intermediate stop position, and the digital switch DS17 is for setting the maximum rising position. The setting numerical standard [0m / m] of the digital switches DS14 and DS17 is set by the ON / OFF operation of the proximity switch ES1 that operates when the lifting state is at the lowest position by the nozzle position control mechanism 2 as a boundary. Switch DS8 / DS9,
Select switches SS9 to SS11 are used to set an operating curve that drops to the reference position [0 m / m] from the value set by digital switch DS17.Digital switches DS10 to DS13,
The select switches SS12 to SS16 set an operation curve between the reference position [0 m / m] and the numerical value set by the digital switch DS14. Further, the digital switches DS15 and DS16 and the select switches SS17 to SS19 set the operation curve between the set value of the digital switch DD14 and the set value of the digital switch DS17. The operation of the filler / lifter switch group will be described below. First, the operation based on the set value of the switch group SW for the filler will be described. The air cylinder 51 operates and the filling pump P is operated.
When the rotating cylinder 52 in the inside is rotated, the proximity switch ES2 is simultaneously turned on by the air cylinder 51 to detect this, and the notch 53 of the rotating cylinder 52 causes the introduction path 43 to the nozzle 1.
After that, the setting state of the filler switch group is executed. (It is assumed that the fluid has been sucked into the filling pump at this point.) Then, the operating speed of the stepping motor M2 from this point to the set value of the digital switch DS1 is set by the select switch SS1. , Then digital switch D
The operation speed of the numerical difference from the set value of S1 to the set value of digital switch DS2 is set by select switch SS2,
Since the operating speed of the stepping motor M2 is sequentially set at each setting difference, the hydraulic cylinder 8 is based on this.
When the hydraulic cylinder 8 is operated up to the maximum stroke position (advance position) set by the digital switch DS7, the proximity switch ES4 senses and stops the operation, and the filling is completed. When the proximity switch ES4 is activated, the air cylinder 51 is activated and the rotary cylinder 52 in the filling pump P is rotated to a position where the proximity switch ES3 is turned on and the notch 53 is formed.
Coincides with the exit of hopper 32. At this rotational position, the hydraulic cylinder 8 operates up to the maximum stroke position (retracted position) set by the digital switch DS7 according to the setting states of the digital switches DS5 and DS6 and the select switches SS6 to SS8. Thereby, the fluid is hopper by the piston 9.
It is sucked into the rotary cylinder 52 of the filling pump P from 32. The linear pulse encoder R2 is a hydraulic cylinder 8
The operating position of is converted into an electric signal and displayed on the display 79. Next, the operation based on the set value of the lifter switch group will be described. The lifter operation is started from the set value of the digital switch DS17, that is, the time when the nozzle 1 is at the highest rising position. Then, the stepping motor M1 first moves to the value set by the digital switch DS8 at the setting speed of the select switch SS9, then moves to the set value of the digital switch DS9 at the setting speed of the select switch SS10, and the proximity switch ES1 turns ON. Until then, the rod of the hydraulic cylinder 7 is lowered to lower the nozzle 1 and the filling amount control mechanism 3. This proximity switch ES1 is ON
When it operates, the descent stops at the speed set by the select switch SS11. The tip of the nozzle is in the container 10
The nozzle 1 is located in the mouth of the nozzle, and the filling is started from this position while the nozzle 1 is being raised. In order to prevent the tip of the nozzle 1 from coming into contact with the inner bottom of the container 10 at the re-lowering position, the height of the nozzle position control device 2 is adjusted with the handle 13, and this position is set as the reference position [0 m / m] in advance. deep. To move up from the re-lowering position, first use the digital switch.
The operation curve set by DS10 to DS13 and select switches SS12 to SS16 is performed up to the intermediate stop position set by digital switch DS14. After stopping for a while and filling is completed, the nozzle 1 is moved up by the hydraulic cylinder 7 according to the operation curve set by the digital switches DS15 and DS16 and the select switches SS17 to SS19, and the maximum rising position set by the digital switch DS17 is set. Rise to and stop. The linear pulse encoder R1 is a hydraulic cylinder 7
Is converted into an electric signal and displayed on the display 78. The filler operation and the lifter operation have been separately described above, but since the filling control is performed integrally with both, the operation relationship between the two will be described below. The control panel 90 is provided with an independent operation mode switch and a continuous operation mode switch. The independent operation confirmation of the filler / lifter is performed in the independent operation mode, and when the filler and the lifter are interlocked, the continuous operation mode is set. When the start button 95 provided on the control panel 90 is turned on,
The air cylinder 51 for rotating the filling pump 52 is operated and the proximity switch ES2 senses this, and the notch 53 of the rotary cylinder 52 is aligned with the introduction path 43 to the nozzle 1. Here, the nozzle 1 is at the highest rising position, and the stepping motor M1 first operates according to the operation curve set by the digital switches DS8 and DS9 and the select switches SS9 and SS10 to lower the nozzle 1 and turn on the proximity switch ES1. When it operates, the descent stops at the speed set by the select switch SS11. Next, digital switches DS10-DS13 and select switch
Digital switch DS14 with operating curve set by SS12-SS16
The nozzle 1 moves up to the rising intermediate stop position set by, and the hydraulic cylinder 8 operates by the maximum stroke set by the digital switch DS7 in accordance with the operation curve set by the digital switches DS1 to DS4 and the select switches SS1 to SS5. Then, the fluid in the filling pump P is discharged from the nozzle 1 and the filling into the container 10 is completed, and ES4 detects this. When ES4 is turned on, the air cylinder 44 is operated and the spindle 45 in the nozzle 1 opens and closes the nozzle port 31 to cut off the "dripping" of the fluid. Further, the air motor 25 of the container rotating mechanism is rotated / stopped until the preset time is set after the start button 95 is turned on, and the container 10 is rotated / rotated so that the fluid is filled in every corner of the container 10. Stop control. When the filling is completed, the air cylinder 51 is activated and the rotary cylinder 52 in the filling pump P is rotated to a position where the proximity switch ES3 is activated, and the notch 53 is aligned with the outlet of the hopper 32. Digital switch DS5 in this rotational position
・ The hydraulic cylinder 8 operates up to the maximum stroke position (retracted position) set by the digital switch DS7 according to the setting states of DS6 and select switches SS6 to SS8, and the piston 54
Thus, the fluid is sucked from the hopper 32 into the rotary cylinder 52 of the filling pump P. Simultaneously with this inhalation, the nozzle 1 moves from the rising intermediate stop position set by the digital switch DS14 to the digital switch DS.
15. By the operation of the hydraulic cylinder 7 based on the operation curve set by the DS16 and the select switches SS17 to SS19, the hydraulic cylinder 7 is raised to the maximum rising position set by the digital switch DS17 and stopped. This completes a series of operations for filling, and the container 10 is taken out. Note that FIG. 11 shows the lift stroke and filler stroke in actual use. LS-2 is the lift setting position of the nozzle position control mechanism 2, LS-1 is the lift intermediate stop position at the completion of the filling operation, FS -1 is a suction amount setting position by the piston 54 of the filling pump P. This operating curve is shown in Fig. 10 (D).
Displayed on the CRT display 83. As mentioned above, the operation curve of each part of the hardware is set by the digital switch.However, the basic program of the operation curve is stored in the read-only memory 64, and is input to the central processing unit 61, and the switch group SW is operated. The operation curve can be changed instantaneously, and by storing in this read-only memory 64 the operation pattern suitable for the container of the container 10, the shape, the height of the mouth, and the fluid to be filled, It is also possible to select a motion curve that suits it. <Software for Filling Machine Control> Next, software for controlling the filling machine will be described. First, the software control of the filler operation will be described based on the flowcharts shown in FIGS. It should be noted that A, B, C, D, E, and F shown below indicate the rotational position of the stepping motor M2, and FS-1 indicates the stroke amount m / m of the hydraulic cylinder 8. Position 000 is the origin of stepping motor M2. A to F are set respectively corresponding to the digital switches DS1 to DS6, and FS-1
Is set by digital switch DS7. The condition of the initial set by each switch group is [000> -A
> -B <-C <-D <000 <+ E> + F> 000], [-B
> -390], [+ E <+370] The microcomputer confirms that the range is satisfied. The stroke of the filler is set to [000m / m <FS-1 <95m / m]. First, the process shifts from the starting step 101 to the initial setting step 102, but when the initial setting is not performed in step 102, the process shifts to the waiting loop. In step 103, 240 pulses are sent in the reverse direction to the position A at a speed of 1 KPPS. here,
The position of the spindle 54 is set to the upper limit (open) direction,
The fluid 4 is ready to be discharged. In the next step 104, 20 pulses are sent in the reverse direction to the position B at a speed of 200 PPS. Similarly, in step 105, 30 pulses are returned to the position C at a speed of 333PPS in the positive direction, and in step 106, the position 2 is returned to the position D.
At 50PPS, 20 pulses are returned in the positive direction. In the next step 107, the position D is held until there is a signal from the proximity switch ES4 (filling end position), but when the signal from the proximity switch ES4 is not input even after the elapse of a predetermined time, the process proceeds to the sub routine step 108. Then, an error signal is output, execution of the program thereafter is stopped, and it is returned to the position 000. In the next step 109, by the signal from the proximity switch ES4, 210 pulses are returned to the position 000 in the positive direction at a speed of 2 KPPS, and the position is held in step 110. At this time, the spindle 54 is set to the lower limit (closed) position 130, and the filling is completed. At the same time, the filling amount display of the digital display 79 which has added the stroke amount FS-1 is set to zero. In step 111, position 0 until the signal from the proximity switch ES3 (inhalation sensor) is input
00 is retained. When the signal from the proximity switch ES3 is input in the next step 112, the speed is 333PPS to the position E.
In the positive direction, 135 pulses are sent. At step 113, 85 pulses are returned to the position F at a speed of 833PPS in the reverse direction. In step 114, it is compared whether or not the stroke of the hydraulic cylinder 8 is at a predetermined value (FS-1), and the position F is held until this signal is output. If an error occurs here, the process proceeds to the subroutine step 108. In the next step 115, in the reverse direction at the speed of 3.3KPPS to the position 000, by the signal indicating the movement to the predetermined value (FS-1).
Only 50 pulses are returned. In step 116, it is confirmed that the display value of the stroke scale is larger than the value 26.5 m / m set in FS-1, the position is held at position 000, and the process ends in step 117. Next, the lifter control will be described with reference to the flowcharts of FIGS. In addition, G ・ H ・
I, J, K, M, and N indicate the rotational position of the stepping motor M1, LS-1 indicates the rising intermediate stop position, and LS-2 indicates the maximum established rising position. Position 000 is the origin of the stepping motor M1. And G to N are digital switches DS8 to DS1
3 ・ DS15 ・ DS16 are set respectively, LS-1 is set by digital switch DS14, and LS-2 is set by digital switch DS17. The condition of the initial set by each switch group SW is [-400 <
-G <-H <000 <I <J>K>L> 000 <M>N> 00
0] and [J <375> M], and the stroke of the hydraulic cylinder 7 is set to [000 m / m <LS-1 <LS-2 <190 m / m], respectively. First, after starting in step 201, initial setting is performed in step 202. Here, when it is not set, step 202 is performed again.
Return to the loop. Step 202 shifts to step 203, in which stepping motor M1 is moved to position G (the total number of pulses is 395) at a speed of 1 KPPS [1000 pulses / sec].
And send 395 pulses. Subsequently, the routine proceeds to step 204, and returns to position H by 205 pulses at 833 PPS [833 pulses / sec]. In the next step 205, the hydraulic cylinder 7 of the nozzle position control mechanism 2 is held until the proximity switch ES1 (lower limit sensor) is input. Here, the position of the spindle 45 is
Set in the upper limit (open) direction. If an operation error occurs here, an error signal is sent, the subsequent program execution is stopped, and the routine 206 for resetting to the initial setting state is executed.
Move to. In step 207, the stepping motor M1 of the nozzle position control mechanism 2 receives the signal from the proximity switch ES1 and is returned to 000 at 1 KPPS. Here, the nozzle position display of the digital display 78, which has added the stroke amount of the hydraulic cylinder 7 by the signal from the proximity switch ES1, is set to zero. Step 208
Then, 65 pulses are sent to position I at a speed of 1 KPPS, and in the next step 209, 60 pulses are sent to position J at a speed of 1 KPPS. In the next step 210, speed 3 is reversed in the opposite direction to position K.
Forty-three pulses are returned at 33PPS, and further, at step 211, for 15 pulses at a speed of 250PPS in the reverse direction to position L.
Subsequently, in step 212, the position L is maintained until the position of the filling amount control mechanism 3 reaches LS-1. If an error occurs here, the process proceeds to step 206 via step 213.
Next, at step 214, when there is a signal indicating that the nozzle position LS-1 has been reached, 65 pulses are returned to position 000 at a speed of 1 KPPS. Here, the spindle 45 is set to the lower limit (closed) position and the filling is completed. Subsequently, in step 215, it is determined whether the select switch of the control panel is set to the independent operation mode or the continuous operation mode. If the continuous operation mode is set, the process proceeds to step 216 and the proximity switch ES3 The input of [function as an inhalation sensor] is shifted to step 217, and further to step 218. In step 218, the speed is 833PPS in the positive direction up to position M. 2
Only 15 pulses are sent. In step 219, 170 pulses are returned to position N at speed 833PPS, and position N is maintained until there is a signal to move to position LS-2.
Move to 0. When this signal is input in step 221, it is returned to the position 000 in the reverse direction by 45 pulses at a speed of 1 KPPS. In the next step 222, the set value of LS-2 is 100m / m
Confirm that the actual lifter stroke value is larger,
Hold at position 000. As shown in the flowcharts of FIGS. 14 and 15, the spindle 45 closes the nozzle opening 31 at the end of filling, and the container rotating mechanism rotates until the selected time after the start button 95 is turned ON. -The air cylinder 44 and the air motor 25 are controlled to stop. FIGS. 16 and 17 are time charts showing the above-described operation, and show the operating states of the stepping motors M1 and M2 and the operating state of the filling machine, which are used to explain the mutual operation of each flowchart. The relationship becomes clear. Although the digital servo valve formed by the stepping motor and the digital solenoid valve is used in the above embodiments, the device may be configured by using an analog servo valve. In that case, the design is slightly changed, but the control by digital signals is basically by analog signals, and is basically the same. [Effect of the Invention] According to the present invention, a plurality of types of control patterns of the filling amount of the fluid filled from the nozzle into the container per unit time and the height of the nozzle are stored in advance, and the control patterns are stored. It can be arbitrarily selected and operated. Therefore, the optimum filling condition can be easily selected according to the physical properties of the fluid, and a single filling machine can be used to fill the fluid having a wide range of physical properties, from an aqueous solution to a highly viscous cream. Further, since it is controlled by hydraulic pressure, the operation is smooth even during the filling process, and the operation curve can be delicately changed, so that no bubbles are mixed in the fluid. Moreover, since the control pattern can be easily selected by a keyboard, a switch group, magnetism, a punched card, or the like, special knowledge does not require skill and can be quickly performed.

[Brief description of drawings]

FIG. 1 shows a claim correspondence diagram of the present invention, and FIGS.
FIG. 1 shows an embodiment of a filling machine according to the present invention, FIG. 2 is a front view showing a mechanical structure portion of the filling machine, FIG. 3 is a partially longitudinal front view of a container mounting device, and FIG. FIG. 5 is a vertical sectional view of a nozzle, FIG. 5 is a vertical sectional view of a filling pump portion, FIG. 6 is a plan view of a stepping motor, and FIGS. 7A and 7B are vertical sectional views showing another embodiment of the nozzle. FIG. 8 (A) shows a sectional view of another embodiment of the nozzle, FIG. 8 (B) shows a closed state, and FIG. 8 (C) shows an open state. FIG. 9 is a block diagram showing hardware of a pulse generator, an operation pattern memory and an operation pattern selector, and FIG. 10 (A) is a front view showing a control panel for accommodating hardware and the like, and FIG. (B)
(C) is a front view showing a switch group, FIG. 10 (D) is a front view showing an embodiment of another control panel, FIG. 11 is a graph showing operation curves of respective parts, and FIG. 12 (A) ( B) is a flow chart showing a filling amount control process, FIGS. 13 (A) and (B) are flow charts showing nozzle position control, FIG. 14 is a flow chart showing opening / closing control of a nozzle opening by a spindle, and FIG.
The figure is a flow chart showing the control process of the container rotation mechanism.
FIG. 16 is a time chart showing the filling amount control process, FIG.
The figure is a time chart showing the nozzle position control process. 18 and 19 are cross-sectional views showing a conventional filling machine. 1 ... Nozzle, 2 ... Nozzle position control mechanism, 3 ... Filling amount control mechanism, 4 ... Pulse generation section as operation signal generation section, 5 ... Operation pattern storage section, 6 ... Operation pattern selection section, 7/8 hydraulic cylinder, 9 hydraulic pump, P filling pump, B1, B2 servo valve.

Continuation of the front page (56) References JP-A-60-58304 (JP, A) JP-A-62-28301 (JP, A) Actually opened 62-146704 (JP, U)

Claims (1)

[Claims] 1. A nozzle for filling a container with a fluid, a nozzle position control mechanism for adjusting the height of the nozzle, and a filling amount of the fluid filled from the nozzle into the container per unit time. In a filling machine having a filling amount control mechanism for changing the filling amount, the nozzle discharges the fluid delivered by a filling pump to fill the container, and the nozzle position control mechanism A first hydraulic cylinder that is vertically movably supported; and a first servo valve for varying the amount of oil that should be supplied from a hydraulic pump to the first hydraulic cylinder. A second hydraulic cylinder that operates the filling pump to change the discharge amount of the fluid from the nozzle, and a second hydraulic cylinder that changes the amount of oil to be supplied to the second hydraulic cylinder from the hydraulic pump. Service Further, in addition to the nozzle position control mechanism and the filling amount control mechanism, an operation signal generator for controlling the operation of each servo valve, and an operation pattern for storing the operation pattern of each servo valve. A storage unit and an operation pattern selection unit for arbitrarily selecting the operation pattern according to the type of container to be filled and the property of the fluid and sending the operation pattern to the operation signal generation unit. Filling machine.