JP2001122202A - Metering and filling method for material to be packaged for packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provided a quantitative packaging method for a material to be packaged for smoothly and quickly filling the material to be packaged and performing the quantitative detection thereof with a compact filling device. SOLUTION: When a moving body moved between stations is stopped intermittently, a grip base is clamped by a clamping means and the grip base is released by a gripping means provided on the moving body. Then the grip base is lifted by a lifting and lowering means to start the coarse filling of the material to be packaged in the state of facing a packaging bag to a feed cylinder of a feed means for the material to be packaged. Simultaneously, the fine filling is carried out while the packaging bag is lowered and the packaging quantity is sensed by a sensor of a metering device, and the introduction is discontinued after a given quantity is filled, and the grip base is gripped again by the gripping means and the grip base is fixed on the moving body side, and the them grip base is released by the clamping means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for quantitatively filling a packaged object such as powder or granules in a rotary or linear reciprocating type packaging machine.

[0002]

2. Description of the Related Art As a general filling device of a conventional rotary packaging machine, a large number of grip pairs are projected in a radial direction of a rotating body, and supplied packaging bags are sequentially held in a suspended manner by each grip pair. While intermittently moving to each station such as opening station, filling station, top seal station, etc., a predetermined amount of items to be packaged is filled with the filling funnel within the stop time of one process, the bag mouth is sealed, and then the Is discharged to the public.
It is known from Japanese Patent Publication No. In addition, after performing large-scale feeding with the packaging bag gripped on the filling table side,
Re-grip with the grip of the quantitative detector, dispensing and dispensing, weigh with the quantitative detector, grip the packed bag again to the filling table side, deliver it to the seal table and seal the bag mouth Is disclosed in Japanese Patent Publication No. 6-29043.

[0003]

In the above-described conventional filling apparatus and measuring and packaging method, all of the objects to be packaged are dropped in a state in which the filling funnel is close to the bag mouth of the packaging bag. However, when the object to be packaged is a powder such as flour or potato starch, there is a drop from the bag mouth to the bag bottom, so that it rises up at the time of charging and the accommodation becomes poor. If it takes a long time for the rising to stop, the downtime at the filling station increases, which necessarily reduces the packing capacity. The soared powder is discharged to the outside by the suction device, but even if the amount of soaking in each bag is small, it reaches a non-negligible amount in proportion to the production amount, so that the soaring phenomenon is suppressed as much as possible. Is preferred. In the latter weighing and packaging method, a structure for performing quantitative detection of an article to be packaged while holding a packaging bag is disclosed.Large dispensing and small dispensing are performed by a screw type feeding device provided in separate stations. Since the filling and sealing of the bag mouth are performed on separate tables, the size of the packaging machine is increased, and the overall structure is complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for quantitatively filling an object to be packaged, in which the filling and quantitative detection of the object to be packaged are performed smoothly and quickly by a compact filling device.

[0005]

According to a first aspect of the present invention, a moving body intermittently moving between a number of stations is provided with the same number of gripping means as the number of stations, and the bag opening is raised. A plurality of grip bases having a pair of grips for supporting the packaging bag in a suspended manner are provided so that they can be gripped or released by the corresponding gripping means, and the detector of the weighing device using the load cell is moved in the vertical direction. An elevating means is arranged at the filling station, and a clamp means for holding or releasing a support rod vertically suspended from each grip base is provided so as to be fixed to the detector, and when the moving body intermittently stops at the filling station. Next, the support rod is gripped by the clamp means, and the grip base is released by the gripping means. In the state where the packaging bag opened by lifting the base is exposed to the supply cylinder of the packaged article supply means, large-discharge charging of the packaged object is started, and at the same time, small-discharge charging is performed while lowering the packaging bag. The filling amount is detected by the detector, the charging is stopped after filling the predetermined amount, the grip base is gripped again by the gripping means, and the base is fixed to the moving body side, and then the support rod is released by the clamp means. Is performed.

[0006]

When the moving body to which the grip base supporting the packaging bag is fixed stops intermittently at the filling station, the support rod of the grip base is gripped by the clamp means which stands by in an open state, and the gripping means is used. Release of the grip base is performed. In a state where the grip base is separated from the moving body, the total weight of the separation unit (tare) is detected by the detector, and a zero point adjustment of the arithmetic processing unit of the weighing device is performed by the output signal. Then, the grip base is lifted by the operation of the lifting / lowering means, and large-size feeding of the articles to be packaged is started in a state in which the packaging bag faces deeply into the supply cylinder of the article-supplying means.
At the same time, the dispensing and feeding is continued while the packaging bag is lowered by the lifting / lowering means, and the filling amount of the article to be packaged is detected by the detector using the load cell in synchronization with the loading operation, and after filling the predetermined amount, Immediately the introduction is stopped. The number of times of detection of the packaged object is about 3 to 25 times per second. As the filling amount approaches the net amount, a data signal is output in real time from the sequence function of the weighing device to the package supply means, and the data signal is received. The package supply means performs optimal feedback control so that the screw is decelerated and the discharge gate is gradually narrowed. When the fixed quantity filling of the article to be packaged is completed, the grip base is gripped again by the gripping means and fixed to the movable body side, and then the support rod is released by the clamp means. The above-described series of operations is performed within a stop time of the moving body at the filling station.

According to the method for quantitatively filling an object to be packaged in this packaging machine, the filling and quantitative detection of the object to be packaged are performed smoothly and quickly by a compact quantitative filling device. It is possible to suppress the soaring and to correspond to a packaging machine with high packaging ability.

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a side view of a fixed quantity filling device of a rotary packaging machine suitable for the method of the present invention, FIG. 2 is an explanatory view showing a state in which a packaging bag is raised to a filling position in FIG. 1, and FIG. 3 is a plan view of a main part. .

[0009] In the rotary type packaging machine using the fixed quantity filling device F, the supplied packaging bags are successively grasped in a suspended manner by each pair of grips, and are intermittently arranged at each station such as an opening station, a filling station and a top seal station. This is a general basic configuration in which a predetermined amount of articles to be packaged is filled within a stop time of one process while being moved, a bag mouth is sealed, and then discharged outside the machine. Therefore, a part of the configuration is changed.

As shown in FIGS. 1 and 3, a disk-shaped moving body 1 that rotates intermittently between a number of stations is provided with the same number of gripping means 10 as the number of stations. A base 11 attached to the lower surface of the moving body 1 has a pair of longitudinal axes 12, 12.
Are fixed, and substantially fixed portions 13a of the gripping levers 13 having engagement grooves 14 formed on the inner surface of the distal end are provided on the respective fixed shafts 12 so as to freely swing. Reference numeral 15 denotes a support piece fixed to the lower surface of the base 11 at a center position between the longitudinal axes 12 and 12, and the support piece 15 supports a substantially T-shaped rod 16 so as to slide freely in the radial direction of the moving body 1. are doing. The head 1 of the rod 16
At both ends of 6a, one end 17a of a link 17 is supported by a shaft 18, and the other end 17b of each link 17 is connected to a free end 13b of the gripping lever 13 by a shaft 19. A roller-shaped piece 21 is attached to a shaft 20 fixed to the free end 16b of the rod 16 in the vertical direction. The pressing pieces 22 and 23 disposed before and after the piece 21 are provided so as to be movable in the front-rear direction by a driving mechanism (not shown) so that the piece 21 can be pressed freely.

The gripping means 10 is provided with the pressing piece 2
2, the piece 21 is pressed and the rod 16 is moved forward to move the engaging groove 14 side of the gripping lever 13 outward, and on the contrary, the pressing piece 22 is retracted and the other pressing piece is moved. 23 is configured to move inward on the side of the engagement groove 14 by advancing 23. The closed posture state of the gripping lever 13 is provided so as to be forcibly held by means such as a spring (not shown).

Reference numeral 25 denotes a grip base provided with a grip pair 26 of a known structure for supporting the packaging bag a in a suspended state with the bag opening b facing upward. A pair of longitudinal axes 27, 27 fixed to the grip base 25 are provided with levers 28, 30 so as to be freely swingable, respectively, and a lever 28 having a piece 29 at the tip thereof.
The other lever 30 is connected to the other lever 30 by a link 31, and a tension spring 32 is bridged between the levers 28 and 30. Reference numeral 33 denotes an eccentric pin for bringing the side edge of the lever 28 into contact. A grip body 34 provided with a claw 35 at the tip is fixed to the front front side of the lever 28 and the lever 30.
A movable grip 36 having a claw 37 at the tip is slidably provided on the grip body 34, and is provided so as to clamp the vertical side edge of the packaging bag a with the claw pieces 35 and 37 as shown in FIG.

Reference numerals 38, 38 denote plate pieces fixed to the rear edge of the lower surface of the grip base 25 in a straight line at an interval, and are gripped or released by the gripping lever 13 of the gripping means 10. The outer end surface shape of each plate piece 38 is provided so as to be securely fitted in the engagement groove 14 of the gripping lever 13 in a male and female relationship. Reference numeral 39 denotes a support rod suspended from the center front edge of the grip base.

In the filling station, a motor-driven lifting device 50 for driving a rod 51 by a servo motor (not shown) as a lifting / lowering means for vertically moving a detector 61 of a weighing device 60 using a known load cell is used as a machine base 2. Installed in A mounting portion 61a below the detector 61 is fixed to a base plate 52 fixed to the tip of a rod 51 of the electric lifting device 50. 53 is a mounting portion 6 above the detector 61 for providing a clamping means 65 described later.
1b is a support plate 53 fixed to 1b. Stopper bolts 54 and 55 are provided on the base plate 52 at locations where the detector 61 is sandwiched.
Are arranged so as to be adjustable in height, and are adjusted so as to generate an appropriate gap between the upper surfaces of the stoppers 54 and 55 and the lower surface of the support plate 53 so as not to apply an overload to the detector 61. Do.

In the present embodiment, a "load cell indicator F800" manufactured by Unipulse Co., Ltd. was used as the main device 62 for performing various settings and control processing of the weighing device 60.

Reference numeral 65 denotes a support rod 3 for the grip base 25.
9 is a clamping means for holding or releasing the gripper 9.
A clamp cylinder 66 of the clamp means 65 is erected on the support plate 53, and a frame piece 6
8 is fixed. On the side of the frame piece 68, an inverted C-shaped locking groove 69 is formed. A fixed base 70 provided beside the clamp cylinder 66 has a pair of front and rear clamp pieces 71.
Are attached by shafts 72, respectively. Then, a pin 73 is inserted into a hole (not shown) formed on the lower side of each clamp piece 71 and a locking groove 69 of the frame piece 68 to restrain the clamp pieces 71 in a vertical position. It is provided as follows.

The clamp piece 71 is closed by the extension operation of the rod 67 of the clamp cylinder 66, and the rod 6 is closed.
The clamp means 65 which operates so as to open the clamp piece 71 by the retreat operation 7 is constituted.

Reference numeral 80 denotes a supply cylinder of a screw (auger) type package supply means (not shown). A discharge gate (not shown) at the tip end 81 of the supply cylinder 80 regulates the discharge of the article to be packaged. It has. As shown in FIG. 1, the distal end portion 81 of the supply tube 80 is disposed slightly above the bag mouth b of the packaging bag a to be transferred.

Next, the method of the present invention will be described in relation to the operation of the above-described quantitative filling apparatus F. When the moving body 1 to which the grip base 25 supporting the packaging bag a is fixed by the grip pair 26 is intermittently stopped at the filling station, the clamp piece 71 which is in the open state by the clamp means 65 is closed and the support rod 39 of the grip base 25 is closed. Is gripped. At about the same time, the gripping lever 13 of the gripping means 10 is opened to disengage from the plate 38 and the grip base 25 is released.
Is released. In a state where the grip base 25 is separated from the moving body 1, the total weight of the separated portion is detected by the detector 61, and the output signal thereof performs zero adjustment of the arithmetic processing unit of the weighing device 60. Next, as shown in FIG. 2, the entire grip base 25 is lifted by the electric lifting device 50, and the packaging bag a
Is placed deeply into the supply cylinder 80 of the packaged article supply means, and large-discharge of the packaged article is started. At the same time,
The retraction movement of the rod 51 of the electric lifting device 50 lowers the packaging bag a and continues dispensing and dispensing. The object to be packaged a is detected by the detector 61 in synchronization with the loading operation.
Is detected, and the charging is stopped immediately after filling the predetermined amount. The number of times the package is detected is 3 per second.
About 25 times, and as the filling amount approaches the net amount, a data signal is output in real time to the package supply means from the sequence function provided in the main device 62 of the weighing device 60,
In response to the data signal, the control section of the package supply means performs optimal feedback control so as to decelerate the screw and gradually narrow the discharge gate. When the fixed quantity filling of the packaged object is completed, the gripping lever 13 of the gripping means 10 is closed, so that the grip base 25 is gripped again and fixed to the moving body 1 side, and then the clamping means 6
The fifth clamp piece 71 is opened, and the support rod 39 is released. Such a series of operations is smoothly performed within a stop time of only about 10 seconds at the filling station of the moving object.

As described above, the method for quantitatively filling an object to be packaged in this packaging machine is to smoothly and quickly perform filling and quantitative detection of the object to be packaged by a compact quantitative filling device. Ideal for

[Brief description of the drawings]

FIG. 1 is a side view of a quantitative filling device of a rotary packaging machine suitable for the method of the present invention.

FIG. 2 is an explanatory view showing a state in which the packaging bag is raised to a filling position in FIG.

FIG. 3 is a plan view of a main part of the fixed quantity filling device.

[Explanation of symbols]

a → packing bag b → bag mouth F → quantitative filling device 1 → moving body 10 → gripping means 13 → gripping lever 14
→ engagement groove 25 → grip base 26 → grip pair 35, 37
→ Claw piece 38 → Plate piece 39 → Support rod 50 → Electric lift device (lift device) 60 → Measuring device
61 → detector 65 → clamp means 66 → clamp cylinder 71 →
Clamp piece 80 → Supply cylinder

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Makino 65, Nishiharucho, Nishi-Kasugai-gun, Aichi Prefecture, Ufukuji, Shinmei 65, General Packer Co., Ltd. (72) Inventor Yoshiaki Kawana 1st Suzukicho, Kawasaki-ku, Kawasaki, Kanagawa No. 1 Ajinomoto Co., Inc. Kawasaki Plant (72) Inventor Yoshimitsu Honma 1-1, Suzuki-cho, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Ajinomoto Co., Ltd.Kawasaki Plant (72) Inventor Hidenori Hirakami Kawasaki City, Kanagawa Prefecture 1-1-1, Suzuki-cho, Ajinomoto Co. Kawasaki Plant F-term (reference) 3E018 AA04 AB01 AB03 BA06 BB02 CA03 DA04 EA01 EA03 3E055 AA03 CA04 CB05 EA01 EB05 FA01

Claims (1)

[Claims] 1. A plurality of grip bases provided with the same number of gripping means as a station on a moving body intermittently moving between a number of stations, and a grip pair for supporting a packaging bag in a hanging manner with a bag mouth facing upward. Are provided so that they can be gripped or released by the corresponding gripping means, and lifting means for vertically moving the detector of the weighing device using the load cell are arranged at the filling station, and the supporting rods vertically provided on each grip base are provided. Clamp means for holding or releasing is provided so as to be fixed to the detector, and when the moving body is intermittently stopped at a filling station, the support rod is gripped by the clamp means and a grip base by the grip means is provided. Then, the grip base is lifted by the elevating means, and the opened packaging bag is brought into contact with the supply cylinder of the article supply means. In the inserted state, start large-distribution loading of the article to be packaged, and simultaneously perform dispensing and dispensing while lowering the packaging bag and detect the filling amount by the detector. A method for quantitatively filling an article to be packaged in a packaging machine, characterized in that a grip base is gripped by a gripping means and the base is fixed to the moving body side, and then the support rod is released by the clamp means.