JPH0656133A - Capacity detector for filling material in bag making - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to detect the presence / absence of the filling material in the bag making and the state of the filling material with high accuracy and efficiency. [Structure] A roller 32 that accommodates a filling 2 and rolls following the outer surface of a bag making machine 1 that is conveyed at a predetermined speed, a jig 31 to which this roller 32 is attached, and a time for this jig 31 A displacement sensor 33 that measures the change and the displacement of the jig 31 in the thickness direction of the bag making machine 1, and the displacement sensor 3
3 and the arithmetic unit 38 for counting the capacity of the filling 2 based on the value of the bag 1 at a predetermined speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the capacity of a filling material in a bag for detecting the presence or absence and the excess or deficiency of a solid substance in the bag.

[0002]

2. Description of the Related Art FIGS. 3 (a), 3 (b), 4, 5, and 6
3A and 3B are schematic configuration diagrams showing a conventional detection device for detecting the presence or absence of a solid substance filled in a bag-making device, and the same reference numerals in the respective drawings indicate the same parts. 3 (a) and 3 (b) show an electrode system, in which 1 is a bag, 2 is a filler made of a solid substance such as tablets and granules, which are filled at predetermined intervals. 3 is the packing 2
The film for wrapping 4 is a base that serves as a measurement reference for the filling 2 in the bag making 1, 5 is a magnetic displacement sensor for detecting the filling 2 in the bag making 1, 6, 7 are bearings, 8 Is the bearing 6,
In contrast to 7, a shaft movably engaged, and 9 is a detection plate that comes into contact with the bag 1 and is attached to the tip of the shaft 8. Reference numeral 10 is an electrode plate, 11 is a relay that outputs a signal when energized, and 12 is a spring that constantly presses the shaft 8 in the direction of arrow A, which is indicated by a chain double-dashed line. Reference numeral 13 denotes a DC power source, one of which is connected to the fixed side electrode plate 10 via a relay 11 and the other of which is a movable side electrode plate 1 holding a spring 12.
4 is connected.

In use, the bag making machine 1 is conveyed along the base 4 in the direction of arrow B at a predetermined speed. Then, the filling material 2 in the bag making 1 comes to a predetermined position, and the detection plate 9 becomes the film 3
When the filler 2 comes into contact with the filler 2 via the
2 is pressed to move the shaft 8 in the direction opposite to the arrow A direction. Therefore, as shown in FIG. 3A, the electrode plate 10 and the electrode plate 14 are separated from each other and the power source 13 is turned off, so that the signal from the relay 11 is not transmitted and the filling material 2 is filled. Make a decision. When the filler 2 is missing, the detection plate 9 contacts the film 3 by the pressing force of the spring 12 and the electrode plates 10 and 14 contact each other as shown in FIG. 3B. Since the circuit of the power supply 13 is turned on, the relay 11 is activated, and a signal is transmitted by a detection device (not shown) to judge that the filling 2 is not filled.

FIG. 4 shows a microswitch system. The same reference numerals as those in FIG.
6 is a roller and 17 is a push button. In use, when the bag making 1 on the base 4 moves in the direction of arrow C, the presence or absence of the filling 2 is detected by turning on and off the push button 17 of the micro switch 15.

FIG. 5 shows a magnetic reed switch system. The same reference numerals as those in FIG. 3 denote the same parts, and 18 is a permanent magnet integrally provided with a detection plate 9 similar to that of FIG.
Reference numeral 9 is a reed switch operated by the permanent magnet 18. In use, when the bag making 1 is conveyed in the direction of arrow C, the filling 2 comes to a predetermined position and the detection plate 9 moves up and down, the contact of the reed switch 19 by the permanent magnet 18 is turned on and off. The presence or absence of 2 is detected.

FIG. 6 shows a weight selection type load cell system, wherein the same reference numerals as those in FIG. 3 indicate the same parts, 20 is a run-up conveyor for continuously conveying the bag making 1 in the direction of arrow C, and 21 is the bag making 1 Weighing conveyor, 22 is a load cell, 2
Reference numeral 3 is an instruction unit.

In use, when the film 3 is conveyed on the load cell 22 in the direction of arrow C and the bag making 1 is placed on the weighing conveyor 21, the weight depending on the presence or absence of the filling 2 is determined by the load cell 22. , Is displayed on the instruction unit 23.

As another method, there is a method called a slit laser beam area change measurement formula. In this method, the actuator is brought into contact with the sheet, and a change in the area of the actuator that blocks the laser slit light is measured and determined.

[0009]

By the way, in the above-mentioned conventional apparatus for detecting a solid substance in a bag, as shown in FIG.
The electrode system of (b) and the magnetic reed switch system of FIG.
Since the filling 2 presses the detection plate 9, the measurement is intermittent, and it is impossible to detect a twin tablet in which two tablets of the filling 2 are enclosed, and only the tablet that is completely unlocked. It cannot be detected and the film 3 is easily scratched. Also,
The microswitch method of FIG. 4 can determine only the presence or absence of the filling 2 even if the measurement is continuous, and the load cell method of FIG. 6 has the tare error range due to the film 3 even if the measurement is continuous. Is large, it is difficult to weigh each filling 2, the change in shape and thickness of the filling 2 cannot be discriminated, and further, the case where the tablet which is the filling 2 is broken cannot be detected. In addition, the slit laser beam area change measuring method has a problem that it cannot be incorporated in an existing space in terms of dimensions.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a capacity detecting device for filling material in a bag making it possible to discriminate presence / absence and excess / deficiency of the filling material in the bag making. And

[0011]

According to the present invention, there is provided a capacity detection device for a filling material in a bag making apparatus, which is in contact with and follows the outer surface of the bag making apparatus in which the filling material is housed and conveyed at a predetermined speed, so as to obtain the thickness of the bag making apparatus. A jig that is displaced in the direction depending on the thickness of the filling, a displacement sensor that measures the change in the displacement of the jig, a value measured by this displacement sensor, and a value of a predetermined speed And an arithmetic unit for counting the capacity of the.

[0012]

In the present invention, the bag-making machine filled with the filling material is conveyed to the jig at a predetermined speed, and the jig comes into contact with the outer surface of the bag-making machine to follow the same and displace in the thickness direction. The volume of the filling material in the bag is counted by the arithmetic unit based on the value measured by the sensor and the value measured by the displacement sensor and the value at the predetermined speed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic constitutional view showing an embodiment of the present invention, in which the same reference numerals as those in FIG. 3 designate the same parts, and 31 follows the outer surface of the bag making machine 1 conveyed in the direction of arrow B, A jig that moves in the thickness direction moves horizontally in the direction of arrow D. A roller 32 is rotatably attached to the jig 31 and rolls while following the outer surface of the film 3 of the bag making machine 1. Reference numeral 33 denotes an optical displacement sensor to which a light emitter 34 and a light receiver 35 are attached, and the light emitted from the light emitter 34 is the jig 3
It is reflected by 1 and is received by the light receiver 35. An amplifier 36 amplifies the displacement signal of the optical displacement sensor 33. In addition, in FIG. 1, a plurality of rows, for example, eight rows of the fillings 2 in which the bag making 1 is filled at predetermined intervals in the vertical direction are arranged in the horizontal direction. The jig 31, the optical displacement sensor 33, and the amplifier 36 are also arranged in eight rows in order to detect the eight filled fillers 2 simultaneously. Numeral 37 is a multi-channel AD converter for converting each analog signal of each amplifier 36 into a digital signal, and numeral 38 is an arithmetic unit for arithmetically operating the signals of the AD converter 37, such as a CPU.
The thickness upper limit value setting unit 41 is set by confirming that the thickness when the filling 2 is normally filled in is set within a predetermined dimension.
The thickness lower limit value setting unit 42, and when the bag making 1 is filled with the filling 2, the passage time when the thickness of the filling 2 is within a predetermined dimension is measured, and the upper and lower limits of the standard time are measured. When it is within the range, the time upper limit value setting unit 43, the time lower limit value setting unit 44, and the thickness data display unit 45 of the filling 2 are provided to determine whether or not the capacity is normal.

Next, the operation of FIG. 1 will be described based on the waveform charts of FIGS. In these drawings, S is a reference level on which the bag making 1 is placed, T ₄₁ is an upper limit of thickness set by the thickness upper limit setting unit 41, and T ₄₂ is set by a lower limit of thickness setting unit 42. Lower limit value, T ₃ is a value indicating the thickness of the film 3, t ₄₃ is a time upper limit value, t ₄₄
Is a time lower limit value, which is set by each of the setting units 41 to 44 in FIG. Further, t indicates an arbitrary elapsed time.

In FIG. 2A, the waveform showing the thickness of the bag making machine 1 is within the range between the thickness upper limit value T ₄₁ and the thickness lower limit value T ₄₂ , and the time upper limit value t ₄₃ and the time lower limit value t _{42. Since} it is within the range of ₄₄ , it indicates that the filling material 2 is filled with a proper amount and a proper shape, and is a non-defective product.

In FIG. 2B, the thickness of the film 3 of the bag making 1 is within the range of the time upper limit t ₄₃ and the time lower limit t ₄₄ even if the bag making 1 moves and the predetermined time t elapses. Value T ₃
Since there is no change in the waveform as it is, it indicates that the filling 2 shown by the broken line in FIG. 1 is not filled at the place to be filled.

In FIG. 2C, since the height of the corrugation of the bag making 1 is not within the range between the thickness upper limit value T ₄₁ and the thickness lower limit value T ₄₂ but exceeds the time lower limit t ₄₄ , the inside of the bag making 1 is shown. If the filling 2 has a prescribed value, that is, if one filling 2 has a prescribed value, FIG. 2C shows that a prescribed amount or more of the tablets are filled.

In FIG. 2D, the height of the bag making machine 1 is the upper limit value t of the time.
_When a part between ₄₃ and the time lower limit value t ₄₄ is less than or equal to the thickness lower limit value T ₄₂ , it indicates that, for example, a chipped tablet is enclosed in the bag making 1.

In FIG. 2 (e), the waveform of the bag making 1 is the time upper limit value t.
_When a part between ₄₃ and the time lower limit t ₄₄ is equal to or less than the thickness lower limit T ₄₂ , it indicates that the tablet is broken, for example.

As described above, by continuously measuring the change in the thickness of the bag making 1 with respect to the reference level S by the jig 31 which moves in the direction of the arrow D following the outer surface of the bag making 1, Whether the filling 2 is present or not,
It is possible to determine the state of filling such as overfilling, chipping, or cracking.

[0021]

As described above, according to the present invention, the outer surface of the bag-making product in which the filler is stored and conveyed at a predetermined speed is brought into contact with and follows, and is displaced in the thickness direction according to the thickness of the filler. It consists of a jig, a displacement sensor that measures the change in the displacement of the jig, and an arithmetic unit that counts the volume of the filling material in the bag making by the value measured by this displacement sensor and the value of the predetermined speed. In addition, it is possible to determine the presence or absence of the filling material in the bag-making product, the overfilling, the chipping, the cracking, and the like, which has the advantage that the bag-making inspection can be performed highly accurately and efficiently.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a waveform diagram illustrating the operation of FIG.

FIG. 3 is a schematic configuration diagram showing a conventional detection device.

FIG. 4 is a schematic configuration diagram showing a conventional detection device.

FIG. 5 is a schematic configuration diagram showing another conventional detection device.

FIG. 6 is a schematic configuration diagram showing still another conventional detection device.

[Explanation of symbols]

 1 Bag Making 2 Filling Material 3 Film 4 Base 31 Jig 32 Roller 33 Displacement Sensor 38 Computing Device

Claims (1)

[Claims] 1. A jig which comes into contact with and follows the outer surface of a bag-making product in which the filling material is stored and conveyed at a predetermined speed, and which is displaced in the thickness direction of the bag-making material according to the thickness of the filling material, and this jig. Of the displacement sensor, a value measured by the displacement sensor, and an arithmetic unit for counting the capacity of the filling material of the bag making by the value of the predetermined speed. Capacity detection device for filling materials in bag making.