JPH01254501A - Portionwise packing machine - Google Patents

Abstract

PURPOSE:To discharge air by compressing a powder without providing a special movable pressurizing means, by pressing the powder sent out to the upper part of a cylinder by the rising of a piston by a weight and detecting the movement of the weight to stop the piston. CONSTITUTION:A hopper 38 is moved to a cylinder 2 in such a state that a piston 4 is allowed to fall to a lower limit position to supply a prescribed amount of powder F to the cylinder 2. Next, a weight 40 is moved to the cylinder 2 and the piston 4 is raised. Whereupon, the powder F is pressed to discharge air and made constant in a density gradient to flatten the upper end thereof. The movement of the weight 40 is detected by a proximity sensor to stop the rising of the piston 4. At this time, the amount of the powder F is calculated. Next, the weight 40 is returned to a predetermined position and the piston 4 is raised to extrude the powder F from a cylinder 2 by a predetermined portionwise packing amount. In connection with this, a blade 44 is rotated to allow the powder F to fall in a hopper 22 and allows said powder F to fall in a moving packing container 23 to successively pack the same.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a packaging machine that distributes powder or granules such as pharmaceutical products into a predetermined number and sequentially packages the distributed products.

``Conventional technology j'' Conventionally, such a packaging machine was developed using the
A packaging machine as described in Publication No. 83 has been proposed. This is done by installing a measuring moving body that can move freely at a suitable location on the aircraft, and setting up a pillar of an appropriate height at one end of this measuring moving body. A positioning rod of a required length that moves up and down in the direction is provided, and an inclined guide rod is provided at the upper end of the column, the base end of which is pivotally supported, and the other end of which is freely supported on the upper end of the positioning rod. The gear provided on the setting rod is meshed with a rotating gear on the control shaft that can maintain a fixed position, and a lifting force is always applied, and a lateral movement force is always applied to the measurement moving object in the direction of measurement movement. A vertical displacement sensor is provided adjacent to the position setting rod elevating part with the measuring movable body in the starting position, and a cylinder of the required diameter is vertically disposed at a suitable location on the machine body. A control unit that intermittently moves a ram forming a movable bottom in the mold measuring container at equal intervals in a predetermined number of colors up to a perpendicular line passing through the movable intersection where the sensor and the inclined guide rod touch. and a return drive unit, and a scraping mechanism linked to the intermittent feed is attached to the upper end opening of the one container.

In such a packaging machine, the volume in the measuring container is set in advance by lowering the ram (piston), and then the measuring container (cylinder) is filled with powder to be processed, and then the set number of divisions is The ram is raised in response to this, and the scraping plate mechanism scrapes off the powder pushed upward from the open end of the measuring container.

"Problem to be Solved by the Invention" By the way, if air is present in the powder and granules to be processed filled in a total of one container, the density will vary in each part of the measuring container, and in this state, the ram will If a fixed amount is pushed upward from the open end of a measuring container, equal amounts cannot be packaged, so it is necessary to pressurize the powder to be processed to expel air.

In the above-mentioned packaging machine, a special movable pressure means is required as this means. For this reason, the device has become complicated.

This invention was made in view of the above circumstances, and its purpose is to be able to pressurize powder and granule to discharge air without providing a special movable pressurizing means, thus simplifying the apparatus. Our goal is to provide a packaging machine that can

1. Means for Solving the Problems In order to achieve the above object, the packaging machine of the present invention includes a weight that can be placed on the upper end of the cylinder, and an indicator that indicates when the weight moves upward from the upper end of the cylinder. After the powder is supplied into the cylinder, a weight is placed on one end of the cylinder and the piston is moved until the sensor outputs a pressurization end signal. The present invention is characterized in that it is provided with a pressure control section that raises the powder and granules in the cylinder to pressurize them.

"Embodiment" Hereinafter, an embodiment of the packaging machine of the present invention will be described in detail based on the drawings.

In FIGS. 1 and 2, the symbol ! is a flat base, and on this base 1, as shown in FIG.
It extends and is fixed in the vertical direction. The lower end of the cylinder 2 is fixed to a flat lower base 3. A screw lance 4 is fitted into the cylinder 2 so as to be slidable up and down. A ball screw sleeve 5 is fixed to the lower surface of the biston 4. A nut 6 is screwed onto the ball screw shaft 5. A sleeve 7 and a belt pulley 8 are fitted into the nut 6, and a rotary disk 9a of a rotary encoder 9 is brought into contact with the lower surface of the belt pulley 8, and these are integrally connected by screws or the like. has been done. The rotary encoder 9 includes a rotating disk 9a (see FIG. 3) in which the above-mentioned notch 9b is formed, and a rotating disk 9a (see FIG. 3).
When the notch 9b comes to the position of the sensor 9c, an optical path of the optical sensor 9C is formed through the notch 9b of the rotating disk 9a, and the light is emitted from the light emitting element. When the light-receiving element receives the light, it outputs a detection signal. Reference numeral 10 denotes a bearing case fixed to the lower surface of the lower base 3, and inside this bearing case lθ is a bearing 1.
1. II is housed with its lower part regulated by a lid 12.

The sleeve 7 is fitted into the inner diameter of the bearings 11, 11, and the large diameter portion 7a at the bottom of the sleeve 7 and the ring I3 fitted into the groove formed at the top.
The annular member I4 disposed below the bearings 11 and II prevents the bearings from moving downward. 15 is a stepping motor fixed to the lower base 3, and this stepping motor! A small belt pulley 16 is fixed to the drive shaft 5. A belt I7 is wound between the small belt pulley 16 and the belt pulley 8. I8.19 are optical sensors for detecting the upper and lower limits of the piston 4, respectively, and the tongue piece 20 fixed to the lower end of the ball screw shaft 5 is located at the position of these optical sensors 18 and 19. It is designed to output a detection signal when this happens. With the above configuration, when the stepping motor 5 is started, the belt pulley 8, sleeve 7, nut 6, and rotary encoder 9 are connected via the belt I7.
The rotating disk 9a rotates integrally. This causes the ball screw shaft 5 to rise or fall, and therefore the piston 4
slides upward or downward within the cylinder 2. When the piston 4 rises and reaches the upper limit (the position where the upper end of the piston 4 matches the upper end of the cylinder 2), the optical sensor -! 8 outputs a detection signal, and based on this, the control section stops the stepping motor 15. Further, when the piston 4 descends and reaches the lower limit, the optical sensor 19 outputs a detection signal, and the control section stops the stepping motor 15 based on this. When the piston 4 is raised from the lower limit position, the rising distance can be determined by processing the detection signal output from the rotary encoder 9 in the control section. Therefore, the distance from the upper end of the cylinder 2 to the upper end of the piston 4 can also be determined, and thus the capacity can be determined. Further, the piston 4 is raised and stopped by a predetermined distance based on a detection signal output from the rotary encoder 9, and is moved intermittently.

As shown in FIGS. 1 and 2, an opening 21 is formed in the base 1, and a hopper 22 is fixed to the lower surface of the base 1 below the opening 21. Opening 21
From there, powder and granules are intermittently dropped into the hopper 22 in predetermined packaged quantities, and then dropped into a packaging container 23 moving below the hopper 22, where they are sequentially packaged.

1, 4 and 5, 24 is the base 1
This is a motor that can be switched between forward and reverse rotation, and is fixed to the As shown in FIG. 4, a belt pulley 25 is fixed to a drive shaft extending below the base (2) of the motor 24. Reference numeral 26 denotes a bearing case fixed to the base I. Bearings 27 and 27 are housed in the bearing case 26 with a predetermined distance between them by a collar 28, and are prevented from being removed by a retaining ring 29. There is. A shaft 30 is rotatably fitted into the inner diameter of this bearing 27.27, and a belt wheel 3 is attached to the lower end of the shaft 30.
1 is fixed. Belt wheel 31 and the belt wheel 25
A belt 32 is wound between them. belt wheel 31
As shown in FIG. 5, a rotary disk 33a of a rotary encoder 33 is fixed to the lower surface of the rotary encoder 33 with screws. The rotary encoder 33 includes a rotating disk 33a in which the notch 33b is formed, and three optical sensors 33c and 33 installed to sandwich the rotating disk 33a.
d133e, and these optical sensors
33c, 33d, 33e are optical sensors 33c, 33d, 33e that pass through the notch 33b of the rotating disk 33a.
An optical path 33e is formed so that when the light receiving element receives light emitted from the light emitting element, it outputs a detection signal. A cylindrical support member 34 having a flap 34a is fitted into the upper end of the shaft 30, and its lower end is in contact with the end surface of the bearing 27 located above. As shown in FIG. 1, the upper end of the support member 34 has vertical grooves 34b.
・ is formed, and the approximately U-shaped tightening member 35
The shaft 30 is fixed to the support member 34 by tightening the member 35 with a bolt 36. As shown in FIG. 4, a substantially elliptical support plate 37 is fixed to the lower surface of the flange 34a of the support member 34, and on one side of this support plate 37, the powder and granules in the cylinder 2 are fixed. A hopper 38 for feeding is fixed at its lower end so as to be slightly apart from the upper surface of the base l, and a proximity sensor 39 is fixed at the other side. A weight 40 is provided below the proximity sensor 39. This weight 40 has a protrusion 40a that is connected to the support plate 3.
Through hole 41a of support member 41 fixed to the lower surface of 7
The support plate 37 is fitted into the support plate 37 so as to be vertically movable, and is configured to move horizontally following the horizontal movement of the support plate 37. An annular groove is formed at the upper end of the protrusion 40 of the weight 40, and a retaining ring is fitted into this groove. The 11] surface of the weight 40 is opposed to the lower surface of the proximity sensor 39, and the lower surface is the base l.
is in contact with the top surface of. The proximity sensor 39 has a weight 4
When 0 moves upward, this movement is detected and a pressurization end signal is output. When this pressurization end signal is output, a pressurization control section (not shown) stops the stepping motor 15 to stop the piston 4 from rising. The hopper 38 and weight 40 are controlled to operate as follows.

That is, by driving the motor 24, the shaft 37 rotates, thereby causing the support plate 37 to rotate.

When the support plate 37 rotates in the X direction in FIG. 1 and the hopper 38 is positioned above the cylinder 2, the notch 33b of the rotary disk 33a of the rotary encoder 33 comes to the position of the sensor 33c and outputs a detection signal. , whereby the motor 24 is stopped. Support plate 37
When the weight 40 is positioned on the cylinder 2 when rotated in the Y direction, the rotating disk 33a of the rotary encoder 33
The notch 33b comes to the position of the optical sensor 33e and outputs a detection signal, thereby stopping the motor 24. From the above state, the support plate 3 is moved in the opposite direction.
7 rotates and the motor 24 is stopped by the optical sensor 33d, and the hopper 38 and the weight 40 are each returned to their original positions from above the cylinder 2.

1 and 6, 42 is a motor fixed to the base 1, and the base of this motor 42 is
A rotary arm 43 is fixed to the drive shaft that projects upward. A substantially U-shaped blade 44 is fixed to the rotary arm 43 in plan view. Reference numeral 45 denotes an optical sensor disposed at a predetermined position so as to sandwich the upright piece 44a of the blade 44, with the upright piece 44a leading to the sensor 45.
A detection signal is output when the light emitted from the light emitting element of the optical sensor 45 is blocked by the upright piece 44a. When the motor 42 is started, the rotary arm 43 rotates in the Z direction in FIG. 1, and the blade 44 slides on the base I1, passes over the cylinder 2 and the opening 21, and returns to its original position. At this position, the sensor 45 outputs a detection signal, and the motor 42 is stopped based on this.

Next, the packaging operation performed by the packaging machine configured as described above will be explained based on FIGS. 7 to 10.

First, as shown in Fig. 7, the piston 4 is lowered to the lower limit position, and in this state, the hopper 38 is moved onto the cylinder 2 to dispense a specified amount of powder F according to the number of sachets. Supplied into cylinder 2.

Next, as shown in FIG. 8, after moving the weight 40 onto the cylinder 2, the piston 4 is raised.

In this way, the powder F in the cylinder 2 is pressurized, the air inside the powder F is exhausted, and the density gradient of the powder F is made constant. Further, the upper end of the powder F is flattened.

When the piston 4 rises and the weight 40 moves upward, the proximity sensor 45 detects this movement and outputs a pressurization end signal. When this signal is output, the upward movement of the piston 4 is stopped by the pressurization control section. At this time, the grip of the powder F in the cylinder 2 is determined by the control section based on the detection signal output from the rotary encoder 9.

Next, after moving the weight 40 from above the cylinder 2 and returning it to a predetermined position, as shown in FIG. push it out. In this case, by paying attention to the fact that the density of the granular material F decreases substantially proportionally as it goes upwards below the cylinder 2 in the above-mentioned pressurizing operation, the piston 4
The ascending distance corresponding to one package is initially large and then proportionally reduced to correspond to the density gradient of the powder F, so that the powder can be packaged more accurately in predetermined amounts. .

The blade 44 is rotated in conjunction with pushing out a predetermined amount of the powder and granular material F above the cylinder 2, and the extruded powder and granular material F is scraped off from the upper end of the cylinder 2 to form the base l.
The packaged products are dropped into the hopper 22 through the opening 21 of the package, and then dropped into the packaging container 23 moving below the hopper 22, where they are sequentially packaged.

In such a packaging machine, the powder and granular material F is pressurized by the weight 40 and the piston 4 used to send the powder and granular material F above the cylinder 2, so a special movable Since no pressurizing means is required, there is an advantage that the apparatus can be simplified. Moreover, since the piston 4 rises from below and pressurizes the powder F, the air inside the powder F can be effectively discharged. Moreover, the upper end of the powder F can be made flat by the weight 40.

Further, a proximity sensor 39 and a pressure control section are provided, and the proximity sensor 39 detects that the weight 40 has moved upward, outputs a pressure completion signal, and based on this signal, the pressure control section controls the piston. Since I stopped the rise of 4,
Appropriate pressurization of the granular material F can be performed.

In addition, since the amount of powder F supplied from the hopper 38 is pressurized into the cylinder 2, the amount of powder F is determined, so the volume of the cylinder is set in advance as in the conventional method, and the predetermined packaging maximum is set. Since the total amount of language before division is more accurate than the method of dividing into m, it is possible to more accurately divide the language into m units.

In addition, by paying attention to the fact that the density of the powder F is large at the bottom of the cylinder 2 and decreases almost proportionally as it goes up, we calculated the lifting distance corresponding to one sachet of the piston 4. In order to correspond to the density gradient of the powder or granular material F, it is initially large and then becomes proportionally small, so that it is possible to more accurately package the same amount.

Furthermore, since the lifting distance of the piston 4 is set based on the detection signal of the rotary encoder 9, there is an advantage that the powder or granular material F can be easily divided without using a complicated mechanism.

"Effects of the Invention" As explained above, in the packaging machine of the present invention, the powder and granules are pressurized by a weight and a piston used to send the powder and granules upward into the cylinder. For,
Since no special movable pressurizing means is required, there is an advantage that the device can be simplified. Moreover, since the piston rises from below and pressurizes the powder, the air inside the powder can be effectively discharged. Moreover, the upper end of the granular material can be made flat by using a weight. moreover,
A sensor and a pressurization control section are installed, and the sensor detects when the weight moves upward and outputs a pressurization end signal.
Since the pressure control section stops the movement of the piston based on this signal, it is possible to appropriately pressurize the powder or granular material.

[Brief explanation of the drawing]

1 to 6 are diagrams showing an embodiment of the packaging machine of the present invention, in which FIG. 1 is a plan view of the main part, FIG. 2 is a vertical cross-sectional view of the cylinder section, and FIG. Bottom view of the main parts in Figure 2, No. 4
5 is a bottom view of the main part of FIG. 4, and FIG. 6 is a longitudinal sectional view of the blade portion. FIG. 7 to FIG. 1O are diagrams for explaining the packaging operation performed by the packaging machine according to the present invention. 2...Cylinder, 4...Piston, 3
9... Proximity sensor (sensor), 40...
...Weight, 44...Blade, F...
・Powder material. Figure 2 Figure 4 Figure 5 Figure 9 Figure 10

Claims (1)

[Claims] A piston is provided in the lower part of the cylinder into which the powder and granules are supplied from above, and this piston intermittently rises to push out the powder and granules in predetermined portions above the cylinder. ,
A packaging machine that intermittently scrapes the extruded powder or granular material with a blade and divides it into packages, a weight that can be placed on the upper end of the cylinder, and a weight that moves upward from the upper end of the cylinder. a sensor that detects and outputs a pressurization end signal; and after the granular material is supplied into the cylinder, the weight is placed on the upper end of the cylinder, and the sensor outputs a pressurization end signal. A pressurizing control section that pressurizes the powder or granular material in the cylinder by raising the piston to a maximum of 100 degrees.