JPH1123343A - Volume variable type measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To optionally change a measurement volume and measure accurately in a short time in a simple structure by setting a slide core at a catch basin for measurement that can freely go in and come out to the measure, and making an internal volume of the measure changeable by an insertion depth of the slide core. SOLUTION: A cylindrical measuring basin 20 is rotatably supported in cantilever manner at one bearing part 11 of a horizontally laid cylindrical casing 10. A slide core 30 is axially supported at the other bearing part 12 to be freely in and out of the measuring basin 20. A cylindrical body 31 constituting the slide core 30 is shaped like a cylinder having a head part facing the measuring basin 20 closed and forms a measurement space in the measuring basin 20 when inserted into the measuring basin 20. When a shaft 32 is rotated via a handle 33, the cylindrical body 31 reciprocates forward and backward thereby increasing, decreasing an internal volume of the measuring basin 20. A measurement volume is thus optionally changeable. A filling substance is put from a reception hole 16 of the casing 10 when an opening formed in a circumferential face of the measuring basin 20 is directed upside, and discharged from a discharge port 17 when the measure 20 is rotated to face the opening 25 down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a volume measuring device capable of arbitrarily changing a measuring volume, having a short measuring time, and excellent in measuring capacity. More specifically, it is a positive displacement measuring device that can be used for measuring various materials including plastic molding materials, and the measuring volume has a shutter function and can change its internal volume instantly,
The present invention relates to a weighing device capable of weighing in a short time.

[0002]

2. Description of the Related Art A coloring and mixing device for plastic molding materials is provided with a measuring device for measuring the mixed materials. The coloring and mixing device crushes used material called virgin material, pellet material of the original color of the material, virgin material called masterbatch, pigment material kneaded with a pigment to obtain a predetermined color tone, and crushed material. This is a device for producing a molding material having a desired color tone by mixing a predetermined amount of the pulverized material, and a measuring device is provided for measuring these materials.

In general, weighing devices are classified into a weight type and a positive displacement type, and inexpensive positive displacement type weighing devices are widely used. As an example of a positive displacement type measuring device used for a color mixing device for plastic molding materials, a device using a notch provided on a measuring plate is known (see Japanese Patent Publication No. 52-37230 and Japanese Patent Publication No. 52-45581). This device has a ring-shaped closing ring that is partially open, a disk-shaped measuring plate rotatably fitted inside the closing ring, and rotating blades that rub against the upper surfaces thereof. A notch of a certain size is provided on the outer peripheral portion of the weighing plate. The raw material supplied to the weighing plate enters the notch, and the raw material that has protruded from the notch with the rotation of the weighing plate is slid off by the closing ring and the rotating blade, so that a constant volume of raw material is taken out from the notch of the weighing plate. Structure.

The above-mentioned weighing device has an advantage of continuously measuring a constant volume of raw material by rotating a disk-shaped weighing plate.
The size of the notch provided on the outer peripheral portion of the weighing plate cannot be arbitrarily changed, and changing the weighing plate requires inconvenience of replacing the weighing plate. Further, in the weighing device having the above structure, since a plurality of cutouts are provided along the outer periphery of the weighing plate, the size of the cutouts is limited, and the measurement may be inaccurate. That is, since the size of the notch is limited, the weighing device measures the target amount by the product of the number of times determined by the notch and the unit weight per one notch. If the value is out of the range, the weighing will be performed with the nearest integer weighing number, and the weighing will be inaccurate. For example, when weighing 1000 g of raw material by a notch having a capacity of 39 g per piece, the number of times of measurement is 25.6 times (corresponding to 25.6 notches). However, since the number of times after the decimal point cannot be set, the weighing number is the nearest integer of 26 times, which slightly exceeds the target amount.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the conventional weighing device. The weighing volume can be changed arbitrarily, and the weighing accuracy is remarkably excellent while the structure is simple, and the weighing time is greatly increased. It is an object to provide a weighing device that can be shortened.

[0006]

That is, the present invention provides (1) a cylindrical measuring box, a slide core for closing a side end of the measuring box, and a casing for accommodating them. The measuring box is rotatable around its axis and has an opening on its peripheral surface that doubles as a receiving port and a discharging port. A slide core is mounted on the measuring box so that it can be freely inserted and removed, and the internal volume of the measuring box can be changed according to the insertion depth. The weighing box is rotated with the slide core inserted therein, and the rotation opens and closes the opening, and the weighing and discharging of the filling material are performed integrally.

[0007] In the above-mentioned measuring device, after a measuring object having a preset internal volume is filled with a measuring object such as a pellet material or a granular material by adjusting the insertion depth of the slide core,
The measuring box rotates along the inner peripheral surface of the casing. The filling that has protruded from the opening of the measuring box is scraped off during rotation, and the amount of the filling contained in the measuring box is kept constant. This filling material is discharged to the outside as a fixed amount from the same opening with the rotational displacement of the measuring box. Therefore, the preset amount can be easily adjusted.
And it can measure accurately. In addition, as a means for scraping off the portion that protrudes from the opening of the measuring box, the measuring box may be closely fitted to the inside of the casing, and the outer periphery of the measuring box may slide on the inner peripheral surface of the casing, or as described later. Alternatively, a scraper that slides on the outer periphery of the measuring box may be provided on the casing. Further, in the weighing device, the weighing box and the casing perform a shutter function. Due to the rotation of the measuring box, the opening of the measuring box moves from the position of the reception port or the discharge port to be closed, and moves to the reception port or the discharge port to be open. The opening of the opening naturally opens and closes due to the rotation of the measuring box, so there is no need to provide a shutter at the opening. Further, in the present weighing device, since the slide core inserted into the weighing box is reciprocally mounted on the shaft, the weighing volume inside the weighing box can be arbitrarily changed according to the insertion depth of the slide core. In addition, since the measuring box has a cylindrical shape and is rotatable around its axis with a slide core inserted therein, by rotating the measuring box once with the change of the measuring volume, the receiving of the filling material is performed. And discharge are continuously and instantaneously switched. As a result, the measurement time can be reduced. In addition, continuous weighing can be performed in a short time with a simple structure.

The weighing device of the present invention includes a device having the following configuration. (2) The measuring box and the slide core are placed horizontally in the casing. Bearing portions are provided on both sides of the casing, respectively, and one of the bearing portions rotatably supports the measuring box in a cantilever manner, and the other bearing portion supports a slide core so as to be able to move in and out of the measuring box. A receiving port and a discharging port are provided on the upper and lower surfaces of the casing, respectively. The rotation of the measuring box switches the position of the opening between an upward receiving position and a downward discharging position, and the receiving and discharging are performed by dropping the filling material.

The above-mentioned weighing device of the present invention preferably has a horizontal structure. One example of the horizontal type structure is, as described above, a cantilever rotatably supported on a measuring box on one side inside the casing, and a cantilever supported on a sliding core on the other side so as to be able to move in and out of the measuring box. Structure. According to this, the slide core can be taken in and out of the measuring box from the shaft end of the cylindrical measuring box, and the measuring box can be rotated with the slide core inserted. In addition, in the horizontal type structure, a receiving port is provided on the upper surface of the casing and a discharge port is provided on the lower surface of the casing. , And can be discharged from the measuring box. The filling material may fall naturally, but may be provided with a forced falling means such as suction.

Further, the measuring device of the present invention comprises: (3) a gauge for indicating the internal volume of the measuring box is provided on the casing;
Includes a weighing device equipped with a scraper that slides on the outer periphery of the weighing scale at the casing receiving port. As the cage indicating the change of the measuring volume, a scale indicating the insertion depth of the slide core,
Alternatively, an appropriate structure such as an internal volume display means corresponding to the insertion depth can be adopted. By providing such a gauge, the changed measuring volume can be easily grasped. Further, the measuring time can be further reduced by instantaneously switching the measuring volume. In addition, by providing a scraper at the inlet of the casing that is in sliding contact with the outer circumference of the measuring box, even if there is a gap between the casing and the measuring box, the scraper protruding from the opening of the measuring box is scraped off by a certain amount. Therefore, there is no need to bring the casing and the measuring box into close contact,
It is possible to prevent inconvenience due to friction between the two when they are rubbed or rotated.

Further, the metering device of the present invention comprises: (4) a means for continuously supplying the filling material at a receiving port of the casing, and a means for continuously conveying the filling material at an outlet of the casing to supply and measure the filling material; And a weighing device for automatically and continuously carrying out. By providing a continuous supply means or a continuous conveyance means for the filler at the receiving port and the discharge port of the casing, respectively, the supply, the measurement and the discharge of the filler can be automatically and continuously performed. As these supply means or transport means, means for reducing the pressure of a hopper connected to the casing by a blower or the like and forcibly sucking the raw material can be used. Further, by connecting to the mixing device through the continuous conveying means, the measuring device and the mixing device can be integrated, and a measuring and mixing system for continuously performing the measurement and mixing of the pellet material or the like can be formed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments shown in the drawings. The illustrated device configuration shows an example of a horizontal weighing device of the present invention. FIG. 1 is an axial longitudinal sectional view, FIG. 2 is a radial sectional view, and FIG. 3 is a schematic perspective view of a main body. FIG. 4 is a conceptual diagram of a weighing and mixing system using the weighing device.

(I) Structure of the weighing device The weighing device of the present embodiment shown in the drawing has a horizontal cylindrical casing 10 in which a cylindrical measuring box 20 and a slide core 30 are housed. Bearings 11 and 12 are provided on both sides of the casing 10, respectively. The measuring box 20 is rotatably and cantilevered on one of the bearing sections 11 (left side in the drawing), and the slide core 30 is inserted into and removed from the measuring box 20 on the other (right side in the drawing) bearing section 12. It is pivoted.

More specifically, as shown in FIG. 1, the cylindrical measuring box 20 has an end 21 facing the slide core 30 opened, and the other end 22 closed. A rotary shaft 23 projects from the axis of the other end 22. The rotary shaft 23 is mounted on the bearing portion 11 of the casing 10 so that the entire measuring box 20 cantilevered. Supported. The rotating shaft 23 is the bearing 13 of the bearing 11.
, And a pinion 24 is attached to the shaft end thereof. On the other hand, the bearing portion 11 is provided with a rack 14 that meshes with the pinion 24.
The rack 14 is connected to an air cylinder 15 attached to the casing 10, and the measuring cylinder 20 is rotated around the rotation shaft 23 via the rack 14 and the pinion 24 by the air cylinder 15.

On the other hand, the slide core 30 is formed by a cylindrical body 31 having an outer diameter substantially equal to the inner diameter of the measuring box 20 and a screw shaft 32 meshing with the cylindrical body 31. The cylindrical body 31 has a closed cylindrical shape with a head facing the measuring box 20 and is inserted into the measuring box 20 to maintain the measuring box 20 in a closed state. Form. Measuring box 20 and cylindrical body 31
Are provided coaxially, and since the inner diameter of the measuring box 20 and the outer diameter of the cylindrical body 31 are substantially equal to each other, the measuring box 20 can be rotated with the cylindrical body 31 inserted therein. The shaft 32 is supported by the bearing 12 of the casing 10. The tip of the shaft extends inside the cylindrical body 31, and the central portion of the shaft meshes with the rear end of the cylindrical body 31. on the other hand,
A handle 33 is attached to the shaft end of the shaft 32. By rotating the shaft 32 via the handle 33, the cylindrical body 31 is reciprocated back and forth, and slides in and out of the measuring box 20. The inner volume of the measuring box 20 is increased or decreased according to the insertion depth of the cylindrical body 31, and the measuring volume is arbitrarily changed.

A filling port 16 is provided on the upper surface of the casing where the measuring box 20 is stored, and a discharge port 17 is provided immediately below the filling port 16. An opening 25 is provided on the peripheral surface of the measuring box 20 corresponding to the receiving port 16 and the discharging port 17 of the casing 10. The opening 25 of the measuring box 20 is
It is also used as an inlet and an outlet for the filling material, and is provided over the entire length of the measuring box in the axial direction so that no residue is left at the time of discharging. The filling material is discharged from the opening 25 by rotating the measuring box 20 so that the opening 25 faces downward while receiving the filling material with the opening 25 facing upward.

In the illustrated apparatus example, a flange portion 18 forming a funnel-shaped inclined surface is provided at a receiving port 16 of the casing 10. A pipe 40 is connected to the flange portion 18, and a hopper is connected through the pipe 40. Pipe material 4
0 is provided with an opening / closing valve 41. Flange part 1
A scraper 19 is mounted on the inclined surface 8. The scraper 19 is at right angles to the rotation direction of the measuring box 20, that is,
A pair is provided so as to face each other along the axial direction. A gap is kept between the casing 10 and the measuring box 20. The lower end of the scraper 19 extends toward the measuring box 20 beyond this gap, and slightly contacts the peripheral surface of the measuring box 20. The radial side wall 42 of the receiving port 16 also extends inward like the scraper 19 and slightly contacts the peripheral surface of the measuring box 20. The side wall 42 and the scraper 19 form a solid wall surrounding the opening 25 of the measuring box 20 without any gap. The filling protruding from the opening 25 of the measuring box 20 is scraped off by the scraper 19 as the measuring box 20 rotates, and is maintained at a constant capacity.

On the upper surface of the casing 10, a gauge 43 indicating the internal volume of the measuring box 20 is provided. Gauge 43
Is formed by a scale plate 44 indicating the insertion depth of the slide core 30 and an indicator line (not shown) engraved on the outer surface of the cylindrical body of the slide core 30 correspondingly. As the cylindrical body 31 is inserted into the measuring box 20,
The instruction line moves along the scale plate 43, and the insertion depth is displayed. The gauge 43 is not limited to the above-described configuration, and may be of a type that displays the internal volume of the measuring box 20 corresponding to the insertion depth of the cylindrical body 31.

The operation of the above-mentioned measuring device will be described by taking as an example a case where the pellet material is measured to a constant volume. First, at the time of receiving, the opening 25 of the measuring box 20 is connected to the receiving port 15 of the casing 10.
The pellet material is filled into the measuring box 20 from the opening 25 through the receiving port 16. Thereafter, when the measuring cylinder 20 is rotated by the air cylinder 15, the opening 25 moves to the inside of the casing 10, so that the opening 25 is in a closed state, and the supply of the pellet material is stopped by the shutter function of the measuring cylinder 20 described above. You. Therefore, there is no need to provide a shutter at the opening 25.

When the measuring box 20 is rotated with the pellet material slightly protruding from the opening 25, the pellet material protruding from the opening 25 is scraped off by the scraper 19 and maintained at a constant volume. Since the lower surface of the casing receiving port 16 is closed by the outer peripheral surface of the measuring box 20, the portion scraped off by the scraper 19 remains in the receiving port 16 as it is, and the opening 25 is again rotated by the rotation of the measuring box 20.
Is located under the receiving port 16 and is dropped into the measuring box 20. Opening 25 by rotation of weighing box 20
Is moved, and stops just above the discharge port 17 (discharge position) on the lower surface of the casing, the pellet material inside falls from the downward opening 25 and is discharged to the outside through the discharge port 17.
Since a gap is kept between the measuring box 20 and the casing 10, the internal pellet material falls down from the opening 25 as the opening 25 moves downward by the rotation of the measuring box 20. There is no problem because the fixed volume falls. The measuring box 20 with the empty inside is rotated again, the opening 25 is moved upward, and returns to the position directly below the casing receiving port 16 (receiving position),
The above operation is repeated again. In order to change the measurement volume, the shaft 32 is rotated by the handle 33, and the insertion depth of the cylindrical body 31 indicated by the gauge 43 is adjusted to set a position at which a target measurement volume is obtained. After changing the measurement volume, the measurement is performed by the same operation as described above.

As described above, in the present weighing device, the weighing weigher makes one rotation, so that the weighing and discharging of the pellet material are performed in an integrated manner, so that the weighing time can be greatly reduced. In addition, accurate weighing is possible with a simple structure. Further, since the receiving port and the discharging port are provided vertically, supply and discharge of the pellet material can be easily performed by dropping the pellet material. Moreover, the measuring volume can be easily changed by adjusting the insertion depth of the cylinder inserted into the measuring box, and even if the insertion depth is changed, the measuring box can be rotated with the cylinder inserted, No loss of weighing time due to volume change.

(II) Metering and Mixing System FIG. 4 shows an example of a metering and mixing system using the metering device of the present invention. As shown in the figure, the present system comprises hoppers 51, 52, 53 for storing virgin materials, master batches, and recycled materials, respectively, weighing devices 61, 62, 63 of the present invention installed below these hoppers, It comprises an air cylinder 71 connected to the apparatus, a mixing tank 70 installed below each of these measuring devices, and a discharge pipe 72 connected to the lower part of the mixing tank 70, and these parts are connected by a ventilation pipe. ing.

Each hopper is equipped with a level sensor (not shown) for indicating the filling state. Suction pipes 73 and 7 for sucking virgin material or recycled material are provided in hopper 51 for virgin material and hopper 53 for recycled material.
4 are connected. Further, these hoppers 51, 53
Are connected to ventilation pipes 75, 76 for reducing the pressure inside. The ventilation pipes 75 and 76 are connected to a blower 79 via a valve 77 and a filter section 78.
The master batch is fed into the hopper 52 for the master batch in advance irrespective of the suction means. A discharge line 72 for conveying the measured mixed material is provided with a mixing device (not shown).
Is in communication with In this system, preferably,
A control circuit for integrally controlling the operations of these parts is provided.

When an empty space is detected by the level sensors of the hoppers 51 and 53, the signal is received and a blower 79 is received.
Operates, the valve 77 is opened, the hoppers 51 and 53 are decompressed, and the virgin material or the recycled material is sucked through the pipes 73 and 74, respectively. When the filling amount inside the hopper reaches the position of the level sensor, the blower 79 stops after a preset time has elapsed, the valve 77 closes,
The suction of the material is stopped.

With the hoppers 51 to 53 filled with the material, the measuring cylinders of the respective devices are rotated by the air cylinders 71 connected to the respective measuring devices 61 to 63, and the openings are set to the receiving positions facing upward. Then, each material is filled into the measuring box through the opening. Subsequently, when the measuring box is rotated by 180 ° by the air cylinder 71,
Each material falls toward the mixing tank 70 from the opening moved downward. At the same time, the blower 79 operates and the valve 7
7 is opened, and the virgin material and the recycled material are sucked and refilled by the hoppers 51 and 53, respectively. The mixed material stored in the mixing tank 70 receives a signal from a mixer (not shown) and is conveyed to the mixer through a discharge line 72. These series of operations can be automatically performed by the control circuit.

[0026]

As described above, the weighing device of the present invention puts a weighing object such as a pellet material or a granular material in a weighing box,
Since the portion protruding from the opening of the measuring box is rubbed down when the measuring box is rotated to have a constant capacity, accurate measurement can be performed while the apparatus configuration is simple. Furthermore, since the measuring box has a shutter function and the opening of the measuring box is closed by the rotation of the measuring box, there is no need to provide a shutter at the opening. In addition, a series of operations from material receiving to measuring and discharging are continuously and integrally performed by rotation of the measuring box, so that the measuring time can be greatly reduced. Further, the measuring device of the present invention can arbitrarily change the measuring volume according to the insertion depth of the slide core inserted into the measuring box.
In addition, since the measuring box can be rotated while the slide core is filled therein, there is no loss of measuring time due to a change in the measuring volume. In addition, according to the horizontal type device configuration, the receiving port and the discharging port are provided on the upper and lower sides, so that the material can be easily received and discharged simply by rotating the measuring box.
Furthermore, a continuous metering and mixing system can be formed by providing a continuous supply means such as a blower and a control means for a series of operations at the receiving port and the discharge port.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view in the axial direction of a weighing device according to the present invention.

FIG. 2 is a schematic sectional view in the radial direction of the device.

FIG. 3 is a partially cutaway schematic perspective view of a main body of the device.

FIG. 4 is a conceptual diagram of a weighing / mixing system using the above device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10-Casing 11, 12-Bearing part 13-Bearing part 14-Rack 15-Air cylinder 16-Inlet 17-Outlet 18-Flange part 19-Scraper 20-Measuring box 21, 22-End part 23-Rotation 24- Pinion 25-Opening 30-Slide core 31-Cylindrical body 32-Shaft 33-Handle 40-Tube 41-Valve 42-Side wall 43-Gage 44-Scale plate 51-53-Hopper 61-63-Measuring device 70-Mixing tank 71 -Air cylinder 72-Discharge line 73, 74-Suction line 75, 76-Vent line 77-Valve 78-Filter part 79-Blower

Claims (4)

[Claims] 1. A cylindrical measuring box which is rotatable around an axis and has an opening which serves as a receiving port and a discharging port on a peripheral surface, and closes one side end of the measuring box and can enter and exit the measuring box. A slide core mounted on the weighing box to change and adjust the inner volume of the weighing box according to the depth of insertion into the weighing box; and a casing for accommodating the weighing box and the slide core. With the rotation in the state of being inserted into, the opening is opened when the above-mentioned opening is located in the casing and used as a receiving port, and released when the above-mentioned opening is located below in the casing. A variable volume metering device characterized in that the opening is in a closed state in cooperation with the inner wall of the casing, except when both are opened, while the outlet is open. 2. The casing in which the measuring box and the slide core are laterally housed in the casing, bearings are provided on both sides of the casing, and the measuring box is rotatably supported on one of the bearing sections by a cantilever. A slide core is rotatably supported on the other bearing part so as to be able to move in and out of the measuring box. Further, an inlet and an outlet are provided on the upper and lower surfaces of the casing, respectively. The variable displacement type metering device according to claim 1, wherein the position is switched between an upward receiving position and a downward discharging position, and the receiving and discharging are performed by dropping the filling. 3. The variable-volume weighing device according to claim 1, wherein a gauge indicating the inner volume of the weighing box is provided in the casing, and a scraper that slides on the outer periphery of the weighing box is mounted at the casing receiving port. 4. A means for continuously supplying the filling material at a receiving port of the casing, and a means for continuously conveying the filling material at an outlet of the casing to automatically and continuously supply, measure and discharge the filling material. The variable volume type weighing device according to any one of claims 1, 2 and 3.