JP2007106421A - Packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging machine which speedily and precisely packs a powdery body or a granular body, especially a powdery body of a high relative bulk density in a bag. <P>SOLUTION: This packaging machine is equipped with: a first packaging section A and a second packaging section B. In this case, the first packaging section A applies a rough filling to a packaging bag (a) which is supported by a grip pair under a suspension, by an auger device 35 having a deaerating function. The second packaging section B applies sealing on the bag mouth b after filling a regular content amount by applying a compensating filling by an auger device 50 to the packaging bag (a) which has been received from the first packaging section A. The compensation amount to the rough filling amount is calculated from measurement data for every plurality of times by a metering means 40, and the compensation value (inclination pulse number) to the compensation amount is fed back to the control section of the auger device 35, and the rough filling from the next time and on is applied by the weight changed by the compensation, and this motion is repeatedly performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a packaging machine that automatically packs powder such as wheat flour or grains such as seeds and baits at high speed.

  For example, when packing 1 kg of flour with an automatic wrapping machine, if you try to fill the entire amount in the packaging bag at once, air is mixed in the flour, so it is bulky and enters a 1 kg capacity packaging bag. I can't. Therefore, a method is known in which about 320 g of flour is filled in three times with a filling device, the inner volume of the packaging bag is measured with a measuring instrument, the shortage is filled with another filling device, and then sealed. Yes. However, this method requires four filling devices, so the manufacturing cost is high, the filling accuracy is about 20 g on average, and there are many variations in the internal capacity.

  Japanese Examined Patent Publication No. 6-29043 has a filling table and a seal table that rotate intermittently, and puts out into a packaging bag held by a gripper on the filling table, and packs it with a quantitative detector after stamping. A gloss weighing and packaging method is disclosed in which a bag is held and a gripper is released in a state where the gripper is released, and then the packaging bag is again gripped by the gripper and stamped, and then the opening edge of the packaging bag is sealed. ing.

  Although the gloss measurement and packaging method patent publication does not clarify what the packaging material is, if the packaging material is powder, especially wheat flour, Pressing with a stamp from the top causes the disadvantage that the flour rises to the surroundings rather than becoming bulky. In addition, since the dispensing is performed until the regular internal volume is reached while measuring with a quantitative detector, it takes time in this process, and it seems difficult to speed up the packaging. In addition, the packaging capacity in this kind of rotary packaging machine is about 20 bags per minute.

As for a filling device for filling powder or granules into a packaging container or bag, the powder or particles are removed from the outlet of the cylindrical tube by rotating a screw arranged in the cylindrical tube by driving an electric motor device. An auger device provided for delivery is used. For example, in Japanese Patent Application Laid-Open No. 11-348903, a screw is placed in a cylindrical filter that is depressurized or evacuated, the air contained in the powder supplied from the hopper is degassed, and the powder is then discharged. A structure for delivering from is disclosed.
Japanese Patent Publication No. 6-29043 JP 11-348903 A

  An object of the present invention is to provide a packaging machine capable of packing a powder or granules, particularly a powder having a large bulk specific gravity, at high speed with high accuracy.

  In order to achieve the above object, according to the first aspect of the present invention, the first rotating body provided with a large number of grip pairs in the radial direction is intermittently moved for each of a plurality of steps, and is supported in a suspended form by the grip pairs. The first packaging part that roughly fills the packaging bag and the second rotating body in which a large number of grip pairs are provided in the radial direction are moved intermittently for each of the plurality of processes to correct the packaging bag received from the first packaging part. A second wrapping portion for filling and sealing the bag mouth, and in the first wrapping portion, the packing bag is vibrated by the vibration means after roughly filling a predetermined amount of powder or granules by the first filling means. The powder or granules in the packaging bag are made small in size, and the content is measured in a state where the bag mouth portion of the packaging bag is sandwiched by the measuring means and the gripping action by the grip pair is released, and then again. Packaging supported by grip pairs The powder or the granules are made small by applying vibration to the second packing part, and the second filling means removes the insufficient powder or granules with respect to the regular internal volume based on the measurement data by the measuring means. Applying correction filling, applying vibration to the packaging bag with the correction filling to make the powder or granules small, and then sealing the bag mouth to release the product outside the machine. The correction amount for the rough filling amount is calculated based on the measurement data every several times by the weighing unit, the correction value corresponding to the correction amount is fed back to the control unit of the first filling unit, and the rough filling from the next time It is characterized in that it is repeatedly performed in the amount changed by the correction.

  In order to achieve the same object, according to a second aspect of the present invention, in the packaging machine according to the first aspect, the first filling means and the second filling means are arranged in the casing by driving a servo motor. An auger device provided to feed powder or granules from the outlet of the casing into the packaging bag by rotating a screw, and has an auger device having a deaeration function at least for the first filling means It is a feature.

  In order to achieve the same object, the invention described in claim 3 is the packaging machine according to claim 1 or 2, wherein the weight of the product packed in the bag is measured by an auto checker installed at the subsequent stage of the packaging machine. Then, a correction amount for the correction filling amount is calculated based on the measurement data obtained every several times by the auto checker, and a correction value corresponding to the correction amount is fed back to the control unit of the second filling means. It is characterized in that the correction filling is repeatedly performed for the amount changed by the correction.

(Invention of Claim 1)
This packaging machine is configured to feed back the correction value for the coarse filling amount to the control unit of the first filling means, and to apply coarse filling from the next time according to the amount changed by the correction. The body, in particular, powder having a large bulk specific gravity can be filled at high speed with high accuracy.

(Invention of Claim 2)
This packaging machine can perform good quality packaging with little variation in content by adopting an auger device configured to feed powder or granules into a packaging bag by rotating a screw by a servo motor. .

(Invention of Claim 3)
In this packaging machine, the correction value for the correction filling amount is fed back to the control unit of the second filling means by an auto checker installed at the subsequent stage of the packaging machine, and the next correction filling is performed with the amount changed by the correction. Therefore, the filling operation can be performed with high accuracy.

  The best mode of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a rotary type packaging machine according to the present invention, FIG. 2 is an explanatory view showing the flow of filling work, and FIG. 3 is a timing chart of filling work.

  In the rotary packaging machine P according to the present invention shown in FIG. 1, a first rotating body (not shown) provided with a number of grip pairs g in the radial direction is intermittently moved every 10 steps, and the grip pairs g The packaging bag a supported in a suspended shape by the first packaging portion A for roughly filling powder, in this embodiment "flour", and a second rotation in which a number of grip pairs g are provided in the radial direction And a second packaging part B that intermittently moves the body (not shown) every 10 steps, performs correction filling on the packaging bag a received from the first packaging part A, and seals the bag mouth. .

  The main steps of the first packaging part A are a bag feeding step (0) for supplying one packaging bag to each grip pair g by the bag feeding device 30, an opening step (3) for opening the bag mouth, and a first filling. A coarse filling step (4) for coarsely filling flour with an auger device 35 having a deaeration function as a means, a bottom vibration step (5) for vibrating the bottom of the packaging bag to reduce the bulk of the flour inside, and coarse filling A measuring step (6) for measuring the internal volume of the flour by the weighing means (40), a bottom vibration step (7), and a delivery step for transferring the coarsely packed packaging bag to the grip pair g of the second packaging part B by the delivery device 45 (8).

  The auger device has a known structure in which a screw contained in a casing is rotated by a servo motor to feed powder or granules into the packaging bag.

  The main steps of the second packaging part B are a delivery step (11), a bottom vibration step (12, 13), and a correction filling step (14) in which correction filling is performed by the auger device 50 having no deaeration function as a second filling means. ), Bottom vibration step (15, 16), top sealing step (17) for heat sealing the bag mouth by the sealing device 55, cooling / product discharging step for cooling the heat sealing portion and releasing the product outside the machine ( 18).

  In this embodiment, “wheat flour” to be packaged will be described assuming that the normal content is 1 kg, the coarse filling amount is 980 g, and the correction filling amount is 20 g.

Next, the flow of packaging work in the packaging machine P of the present invention will be described based on the drawings.
(1) In FIG. 2, after about 980 g of flour is roughly filled by the auger device 35, the packaging bag a is vibrated by a vibrating means (not shown) to sink the flour in the packaging bag and reduce the bulk. Turn into.
(2) The content is measured in a state where the bag opening b portion of the packaging bag a is clamped by the measuring means 40 and the clamping action by the grip pair g is released.
(3) Next, the packaging bag a is again supported by the grip pair g, and the flour is reduced in size by applying vibration to the bottom of the packaging bag by vibration means.
(4) In the delivery step (8, 11), the roughly filled packaging bag a is transferred to the grip pair g of the second packaging part B by the delivery device 45.
(5) Based on the measurement data obtained by the weighing means 40, about 20 g of wheat flour, which is insufficient with respect to the regular content, is subjected to correction filling by the auger device 50, and vibration is applied to the packaging bag subjected to the correction filling. To make the flour small.
(6) Next, after sealing the bag mouth by the sealing device 55, the product is discharged outside the apparatus.

  As shown in the timing chart of FIG. 3, the correction amount for the rough filling amount is calculated by the control unit 60 of the packaging machine based on the measurement data every several times by the weighing means 40, and the correction value corresponding to the correction amount. The number of tendency pulses is fed back to the control unit of the auger device 35 to control the rotation speed of the servo motor, and the rough filling from the next time is repeatedly applied to the amount changed by the correction. The The correction filling is performed by feeding back the number of correction filling pulses, which is a correction value, to the control unit of the auger device 50 based on the measurement data of each time by the measuring means 40 and controlling the rotation speed of the servo motor.

Further, if the auto-checker 70 is installed at the subsequent stage of the packaging machine P of the present invention, it is possible to perform packaging filling with higher accuracy (corresponding to the invention of claim 3).
In this case, the weight of the product a ′ packed by the auto checker 70 is measured, and the correction amount for the correction filling amount is calculated based on the measurement data every several times by the auto checker 70 to obtain the correction amount. The number of trend pulses is fed back to the control unit of the auger device 50 to control the rotation speed of the servo motor, and the next correction filling is performed repeatedly to the amount changed by the correction. The

  In the packaging machine P in this embodiment, 40 to 50 bags can be packed per minute, and the filling accuracy with respect to 1 kg of the regular internal volume is 1 g or less on average.

  As described above, this packaging machine feeds back the correction value for the coarse filling amount to the control unit of the auger device, and performs the coarse filling from the next time with the amount changed by the correction. There is an advantage that powder such as flour having a large specific gravity can be packaged at high speed with high accuracy.

Plan view of a rotary packaging machine according to the present invention Explanatory drawing showing the flow of filling work Timing chart of filling work

Explanation of symbols

P ... Rotary type packaging machine A ... First packaging part B ... Second packaging part g ... Grip pair a ... Packaging bag b ... Bag mouth 35 ... Auger device (first 1 filling means)
40 ... Measuring means 50 ... Auger device (second filling means)
70 ... Auto checker

Claims (3)

A first wrapping unit in which a plurality of grip pairs are provided in a radial direction; a first wrapping unit that intermittently moves in each of a plurality of steps to roughly fill a packaging bag supported in a suspended manner by the grip pairs; A second wrapping part in which a grip pair is provided in the radial direction, the second rotator is intermittently moved for each of a plurality of steps, and the wrapping bag received from the first wrapping part is subjected to correction filling to seal the bag mouth; Prepared,
In the first packaging part, after roughly filling a predetermined amount of powder or granules by the first filling means, the packaging bag is vibrated by the vibration means, thereby reducing the bulk of the powder or granules in the packaging bag and measuring. The content of the bag is measured by holding the bag mouth portion of the packaging bag by the means and releasing the gripping action by the grip pair, and then applying vibration to the packaging bag supported by the grip pair again to obtain powder or particles. Small body,
In the second packaging unit, the second filling means performs correction filling of the powder or granule that is insufficient with respect to the normal internal volume based on the measurement data by the weighing means, and the packaging bag subjected to the correction filling vibrates. To make the powder or granules small and then seal the bag mouth to release the product out of the machine,
Further, a correction amount for the rough filling amount is calculated based on measurement data every several times by the weighing unit, and a correction value corresponding to the correction amount is fed back to the control unit of the first filling unit, so that the rough value from the next time is calculated. A packaging machine characterized in that filling is repeatedly performed with an amount changed by correction.   The first filling means and the second filling means are provided so as to feed powder or granules from the outlet of the casing into the packaging bag by rotating a screw arranged in the casing by driving a servo motor. 2. The packaging machine according to claim 1, wherein the auger device is a auger device having a deaeration function for at least the first filling means. The weight of the product packed in the bag by the auto checker installed at the subsequent stage of the packaging machine is measured, and the correction amount for the correction filling amount is calculated based on the measurement data every several times by the auto checker. The correction value corresponding to is fed back to the control unit of the second filling means, and the next correction filling is performed repeatedly for the amount changed by the correction. Or the packaging machine of 2.

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