JP2005320066A - Packaging-bag loading device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging-bag loading device for a powder filling apparatus that highly accurately fills each packaging bag with powder at a high speed. <P>SOLUTION: The device includes a filling nozzle having a filling port for supplying powder and filling each packaging bag with the powder and an exhaust port for drawing out air, supplied with the powder at the same time, from the packaging bag. The device also includes a pair of packaging-bag hold arms, each having such a shape (curved shape) that its central section is in almost close contact with the outer circumference of the filling nozzle and both its ends stick out from the filling nozzle. The device further includes a hold arm opening/closing mechanism for opening or closing the pair of packaging-bag hold arms. The packaging bag to be filled with the powder is held between the periphery of the filling nozzle and the pair of packaging-bag hold arms. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging bag mounting device used in a powder filling unit of a powder filling device for filling powder such as wheat flour into a packaging bag.

  In the prior art, a powder filling device 150 for supplying fine powder such as wheat flour and filling the packaging bag is, as shown in FIG. 10, a hopper 152 as a powder reservoir, The first screw conveyor 154 is disposed below the hopper 152 and transfers the powder flowing down from the hopper 152 in a substantially horizontal direction, and is further disposed below the first screw conveyor 154. A second screw conveyor 156 that transfers the powder that has been transferred by the conveyor 154 and has flowed from an opening provided on the lower side of the first screw conveyor 154 in a substantially horizontal direction. The powder transferred by the second screw conveyor 156 is discharged from the filling nozzle 158 and filled in the packaging bag 160.

  The powder filling device 150 is provided with a stirring device 162 for preventing the powder in the hopper 152 from forming a bridge inside the hopper 152, and the powder of the first screw conveyor 154. Exhaust holes 164 for discharging the air transferred together with the powder are provided at the downstream end portion in the transfer direction and, if necessary, at the downstream end portion in the powder transfer direction of the second screw conveyor 156.

  The filling nozzle 158 arranged on the downstream side in the powder transfer direction of the second screw conveyor 156 is inserted into a small opening (not shown) provided on the upper side surface of the packaging bag 160 to supply the powder. Therefore, it is necessary to make the filling nozzle 158 smaller in diameter than the inner diameter of the second screw conveyor 156, and the connecting portion between the second screw conveyor 156 and the filling nozzle 158 is formed to be thin in a trumpet shape. Yes. A discharge port 166 is provided at the tip of the nozzle 158 so as to open obliquely downward. Further, the bottom of the packaging bag 160 is supported by the support frame 168, and the weight of the powder filled in the packaging bag 160 is measured together with the support frame 168 by the measuring device 170.

Such a powder filling apparatus is described in, for example, Patent Document 1, Patent Document 2, and the like.
JP-A-8-337321 JP 2000-128102 A

  As described above, the powder filling device 150 of the prior art has the inner diameter of the filling nozzle 158 smaller than the inner diameter of the second screw conveyor 156, and a connecting portion is provided with a portion that is reduced in a trumpet shape. Therefore, if the powder is to be transferred at a high speed in order to fill the powder in a short time, the powder is likely to be clogged in the portion that is reduced in the trumpet shape (the trumpet tube), and the diameter of the discharge port 166 Therefore, the structure is not necessarily suitable for filling the packaging bag with the powder in a short time.

  In addition, the discharge port 166 of the filling nozzle 158 has a shape that is merely opened obliquely downward, and the powder compacted inside the filling nozzle 158 is broken into a lump at the position of the discharge port 166. Therefore, it is difficult to control the amount of powder supplied to the packaging bag 160 with high accuracy.

  For this reason, for the purpose of high-speed and high-precision filling, a packaging bag having an open upper end is used as the packaging bag 160, and the portion of the filling nozzle 158 that is reduced in a trumpet shape is eliminated. It was considered to fill. When a packaging bag having an open upper end is used as the packaging bag 160, the following performance is required as a holding device for the packaging bag 160 employed in the powder filling apparatus.

  That is, the holding device for the packaging bag 160 causes the opening of the packaging bag 160 to be in close contact with the filling nozzle 158 so that the powder filled in the packaging bag 160 does not fly up and scatter to the surroundings. It must be sealed and held.

  When it is set as the form which hold | maintains so that the opening part of the packaging bag 160 may be closely_contact | adhered to the filling nozzle 158, the load of the packaging bag 160 and its content during filling will also be supported also to the filling nozzle 158 side. In order to control the filling amount with high accuracy in the powder filling apparatus having such a configuration, with the packaging bag 160 suspended from the filling nozzle 158, the entire weight of the packaging bag 160 is obtained only by the holding portion of the packaging bag 160. It is conceivable to measure the weight by supporting In that case, the holding device for the packaging bag 160 is required to have a strong holding force that can support the entire weight (for example, 25 kg) of the packaging bag 160.

  Moreover, it is preferable that the holding device of the packaging bag 160 is compatible with packaging bags of different sizes. However, a packaging bag mounting device having these performances is not known.

  Further, in order to complete the packaging after filling the packaging bag 160 with the powder, for example, in order to appropriately transport the packaging bag 160 to an apparatus such as a conventional deaeration device, a shaping device, or a heat seal device, the packaging bag 160 is used. It is necessary to secure a space for gripping the packaging bag 160 by a transport grip or the like of a transport means for transporting the bag to the next process. Conventionally, in order to secure an area in which the powder is not filled in the upper part of the packaging bag 160, the dimension of the packaging bag 160 is provided so that a space in which the powder is not filled is formed in the upper part of the packaging bag after the filling is completed. As a result, the size of the packaging bag 160 is increased, leading to an increase in cost.

  The object of the present invention is to solve such problems of the prior art, and use a packaging bag having an opening with an open upper end, and the powder can be filled into the packaging bag at high speed and with high accuracy. To provide a packaging bag mounting device that can prevent powder from scattering from the opening of the packaging bag, can hold the packaging bag securely, and can also handle packaging bags of different sizes. It is in.

  In addition, by restricting the area in the packaging bag where the powder is filled, a grip for transporting the transporting means for transporting the packed packaging bag to the next process such as heat sealing is used for gripping the packaging bag. An object of the present invention is to provide a packaging bag mounting apparatus capable of securing a space.

In order to solve the above problems, the present invention includes a filling port for supplying powder and filling the packaging bag, and a filling nozzle having an exhaust hole for discharging air supplied simultaneously with the powder from the packaging bag; ,
A pair of packaging bag holding arms having a shape in which the central portion is substantially in close contact with the outer periphery of the filling nozzle, and both end portions are shaped to protrude outward of the filling nozzle;
A holding arm opening and closing mechanism for opening and closing the pair of packaging bag holding arms,
There is provided a packaging bag mounting device characterized in that the packaging bag filled with the powder is sandwiched and held between an outer periphery of the filling nozzle and the pair of packaging bag holding arms.

  Here, it is preferable that the filling nozzle has a substantially elliptical cross-sectional shape, has a circular filling port in the center, and the exhaust holes are arranged on both sides thereof.

Furthermore, the packaging bag holding arm is attached to a lower surface in the vicinity of the curved portion of the packaging bag holding arm that contacts the filling nozzle, and the packaging bag is filled with the powder in the packaging bag. Including an auxiliary arm to limit the area,
Provided is a packaging bag mounting device, wherein a part of the auxiliary arm is provided in parallel with the packaging bag holding arm.

  Moreover, it is preferable that the inner surface of the pair of packaging bag holding arms and / or the auxiliary arms has a pressing member made of an elastic body that presses the packaging bag against the outer periphery of the filling nozzle.

  Moreover, it is preferable that the said pressing member is a tube-shaped elastic body holding the said packaging bag in the outer peripheral surface.

  Moreover, it is preferable that the said pressing member is an elastic body which has the protrusion part as a slipper for hold | maintaining the said packaging bag in the outer peripheral surface.

  In addition, the length of the portion of the pair of packaging bag holding arms that protrudes outward from the filling nozzle is equal to or longer than the length of the opening of the packaging bag that is mounted on the filling nozzle. Is preferred.

Moreover, it is preferable that the holding arm opening / closing mechanism for opening and closing the pair of packaging bag holding arms is disposed above the filling nozzle.
Furthermore, it is preferable that the exhaust hole of the filling nozzle has a filter that prevents the powder from being discharged together with air, and an exhaust pump that sucks the air discharged through the filter.

  Since the present invention is configured as described above, an opening having an open upper end is provided in a powder filling apparatus capable of filling powder packaging bags at high speed and with high accuracy by a wide-mouth filling nozzle. Even when a packaging bag having a portion is used, it is possible to prevent the powder from scattering from the opening of the packaging bag and to provide a packaging bag mounting device that holds the packaging bag securely. it can. Moreover, according to the packaging bag mounting apparatus of the present invention, it is possible to immediately cope with packaging bags of different sizes without changing the configuration.

  Moreover, the conveyance grip of the conveyance means which conveys a packaging bag to the next process can ensure the space for gripping a packaging bag reliably. At the same time, a seal allowance for sealing the upper portion of the packaging bag can be secured.

  In addition, since the auxiliary arm limits the area where the powder is filled, there is no need for the conveyance grip etc. to consider the inflow of powder into the space for holding the packaging bag, and the packaging bag is smaller than before. Can be made. Thereby, the usage-amount of the packaging material required for packaging bag manufacture can be reduced, and cost can be reduced. Further, the bulk density can be increased by limiting the region where the powder is filled.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a packaging bag mounting device according to the present invention will be described based on preferred embodiments shown in the accompanying drawings. FIG. 1 is a perspective view showing an example of a powder filling apparatus employing the packaging bag mounting apparatus of the present invention, and FIG. 2 is a cross-sectional view of the powder filling apparatus. As shown in the figure, the powder filling apparatus 10 of this embodiment is configured such that the powder stored in a hopper 12 serving as a powder storage unit is horizontally placed on a first screw conveyor 14 disposed below the hopper 12. The first screw conveyor 14 is moved downward by a second screw conveyor 16 disposed at a terminal end on the downstream side in the powder transfer direction of the first screw conveyor 14, and is provided immediately below the second screw conveyor 16. The powder is supplied to the packaging bag 20 from the powder filling nozzle 18. As the packaging bag 20, a normal bag having one of the four sides (upper side) opened can be used, and various sizes according to the filling amount made of resin, paper, or a multilayer body thereof can be used. Can be used.

  In the hopper 12 as the powder reservoir, as in the prior art, a stirring device for stirring the powder inside the hopper 12 so that the powder does not form a bridge and hinder the flow of the powder. 22 is desirable. As the stirring device 22, as shown in the figure, a device in which a rod-like protrusion 26 is provided around a rotating shaft 24 and driven by a motor 28 can be suitably used.

  Below the hopper 12, there is provided a first screw conveyor (screw feeder) 14 for horizontally transferring the powder supplied from the hopper 12 as a powder reservoir. The first screw conveyor 14 of this embodiment is a normal screw conveyor for transferring powder, and a screw 32 that rotates while maintaining a slight gap with the inner surface of the outer cylinder 30 is driven by a motor 34 to generate powder. Transport the body.

  The second screw conveyor 16 is a screw conveyor similar to the first screw conveyor 14, and a screw 38 that rotates with a slight gap from the inner surface of the outer cylinder 36 is driven by a motor 40 to transfer powder. . At the downstream end portion of the first screw conveyor 14 in the powder transfer direction, the rotation axis of the second screw conveyor 16 is arranged vertically.

  In the gap between the first screw conveyor 14 and the second screw conveyor 16, a connecting member 42 made of a flexible elastic body such as rubber connecting the first screw conveyor 14 and the second screw conveyor 16. Is provided. As a result, the first screw conveyor 14 and the second screw conveyor 16 are cut off in terms of weight, and the weight of the powder that has entered the second screw conveyor 16 is reduced by the weighing device 62 as will be described later. It can be measured accurately. The connecting member 42 is depicted in a bellows shape in order to clearly show that it is flexible in FIG. 2, but in practice, at least the inner surface is smooth to prevent the powder from staying. It is desirable that it is a tube shape.

  In the vicinity of the stirring device 22 of the hopper 12, the vicinity of the downstream end portion in the powder transfer direction of the first screw conveyor 14, and the vicinity of the filling nozzle 18 of the second screw conveyor 16, respectively, deaeration Ports 120, 122, and 124 are provided. The deaeration ports 120, 122, and 124 are used for discharging the air mixed into the powder by stirring and transported together with the powder to the outside of the powder filling device 10. The filter 120a, 122a, 124a arranged in the same, deaeration pipes 120b, 122b, 124b for collecting the air exhausted through these filters, and the like. In addition, an intake device (not shown) is connected to the deaeration pipes 120b, 122b, and 124b.

  The filters 120a, 122a, and 124a are disclosed in Japanese Patent Laid-Open No. 2000-335748, Japanese Patent Laid-Open No. 8-23151, and the like related to the present applicant, including filters such as conventionally used wire mesh and punching metal. A filter or the like is preferably used. By being sucked by an unillustrated intake device, the air in the powder filling device 10 is discharged through the filters 120a, 122a, and 124a, and the powder in the powder filling device 10 is deaerated.

  A filling nozzle 18 for filling the powder to be supplied into the packaging bag 20 is arranged at the downstream end portion in the powder transfer direction located below the second screw conveyor 16. The filling nozzle 18 has a substantially elliptical cross section having a minor axis similar to the outer shape of the second screw conveyor 16, and the width in the major axis direction of the filling nozzle 18 is the second screw conveyor 16. It is wider than the outer shape of the second screw conveyor 16 and protrudes to the side of the second screw conveyor 16 (the horizontal direction in FIG. 1 and the direction perpendicular to the paper surface in FIG. 2).

  3A is a longitudinal sectional view of the filling nozzle 18 in the long axis direction (in FIG. 2, the direction perpendicular to the paper surface, in FIG. 1, substantially in the left-right direction), and FIG. 2 is a longitudinal sectional view in the left-right direction), and FIG. 3C is a bottom view of the filling nozzle 18 corresponding to FIG. 3A to 3C also show a packaging bag holding device 52 described later. In the filling nozzle 18, a filling port 44 for supplying powder to the center is formed, and exhaust holes 46 for discharging air supplied together with the powder are formed on both sides along the long axis.

  The filling nozzle 18 is connected so that the diameter of the circular filling port 44 is approximately the same as or slightly larger than the inner diameter of the outer cylinder 36 of the second screw conveyor 16. The transferred powder passes through the filling port 44 of the filling nozzle 18 and is filled into the packaging bag 20 without being compressed. At this time, the air that is transferred simultaneously with the powder and flows into the packaging bag 20 is discharged from the exhaust hole 46.

  The air exhausted from the exhaust hole 46 is exhausted to the outside by the exhaust pump 49 through the air chamber 48 disposed above the filling port 44 and through the pipe 50. Here, it is preferable that a filter 47 for preventing the powder from being discharged together with air is provided on the lower surface of the exhaust hole 46 or inside thereof.

  The packaging bag 20 is supplied to the position of the filling nozzle 18 by a bag feeding device (not shown) so that the longitudinal direction of the opening (the width direction of the packaging bag 20) coincides with the long axis direction of the filling nozzle 18. The packaging bag holding device 52 is held in a state of being hung at a lower position. That is, the filling nozzle 18 and the packaging bag holding device 52 constitute the packaging bag mounting device of the present invention.

  As shown in FIGS. 1 and 3B, the packaging bag holding device 52 includes a pair of packaging bag holding arms 54 and a holding arm opening / closing mechanism 56 that opens and closes the pair of packaging bag holding arms 54. The packaging bag holding device 52 is supplied to the position of the filling nozzle 18 by a supply device (not shown) of the packaging bag 20 and fills the packaging bag 20 arranged so as to cover the filling nozzle 18 by opening the upper end opening. While being sandwiched between the outer periphery of the nozzle 18 and the pair of packaging bag holding arms 54, the packaging bag 20 is suspended and pressed and held so as to be in close contact with the filling nozzle 18.

  As shown in FIG. 3C, each of the pair of packaging bag holding arms 54 has a holding portion (curved holding) having a shape corresponding to a half circumference divided by the major axis of the substantially elliptical outer shape of the filling nozzle 18. Portion) 54a, and the filling nozzle 18 is sandwiched between a pair of packaging bag holding arms 54 (curved holding portion 54a), so that the entire outer periphery of the filling nozzle 18 is substantially closed.

  Each of the pair of packaging bag holding arms 54 is a portion extending in the long axis direction of the filling nozzle 18 continuously from the curved holding portion 54a, that is, the side of the filling nozzle 18 (FIGS. 1 and 3). It has the linear holding part 54b which protrudes in the left-right direction in c). The pair of packaging bag holding arms 54 is configured such that the respective linear holding portions 54 b are in close contact with each other when the respective curved holding portions 54 a are in close contact with the filling nozzle 18. The length of the linear holding portion 54b protruding to the side of the curved holding portion 54a is substantially the same as the length of the opening of the packaging bag 20 attached to the filling nozzle 18 projecting to the side of the filling nozzle 18. Longer than that is desirable.

  A pressing member 58 made of an elastic material such as rubber is disposed on the surfaces of the curved holding portion 54a and the linear holding portion 54b that are in contact with the packaging bag 20. The packaging bag holding device 52 holds the opening portion of the packaging bag 20 through the pressing member 58 so that the central portion of the opening portion of the packaging bag 20 (the portion in contact with the filling nozzle 18) is in close contact with the filling nozzle 18. And the portions projecting on both sides of the filling nozzle 18 at the opening of the packaging bag 20 are hermetically held between the pair of linear holding portions 54b.

  FIG. 4A and FIG. 4B are schematic cross-sectional views showing other embodiments of the pressing member 58. 4A shows a state when the packaging bag 20 is opened, and FIG. 4B shows a state when the packaging bag 20 is held. In the example shown in FIG. 4, a part of the tube-shaped pressing member 58a is fixed to the distal end portion of the packaging bag holding arm 54, and the packaging bag 20 is held on the outer peripheral surface side where the pressing member 58a is not fixed.

5A and 5B are schematic cross-sectional views showing an embodiment different from the above-described embodiment of the pressing member 58 (shown in FIG. 4). 5A shows a state when the packaging bag 20 is opened, and FIG. 5B shows a state when the packaging bag 20 is held.
In the example shown in FIG. 5, the pressing member 58 b and the tip of the packaging bag holding arm 54 are formed so as to bite each other, and the pressing member 58 b is fitted into the tip of the packaging bag holding arm 54. The pressing member 58 b is provided with a protrusion 59 that is a slip stopper that prevents the packaging bag 20 from slipping during the holding operation of the packaging bag holding arm 54 holding the packaging bag 20.

  In addition, as the pressing member 58, in order to further increase the holding force of the packaging bag 20 by the packaging bag holding device 52, it is preferable to use a member having a high friction coefficient or an adsorbing member.

  In order to make the sealing of the packaging bag 20 at the filling nozzle 18 more complete, both ends of the major axis of the substantially elliptical filling nozzle 18 are bent portions (curved holding of the packaging bag holding arm 54). It is preferable to have a protruding shape that matches the curve of the connecting portion between the portion 54a and the linear holding portion 54b), but any shape that allows the packaging bag 20 to be substantially sealed by the pressing member 58 is acceptable. Good. In addition, the shape of the exhaust hole 46 of the filling nozzle 18 is not limited to the circular shape described above. For example, a crescent shape or the like is used, and an area other than the filling port 44 of the filling nozzle 18 can be effectively used to open the hole. You may make it take a large area.

  As described above, since the packaging bag 20 is arranged so that the width direction thereof coincides with the major axis direction of the filling nozzle 18, the opening portion only needs to be opened by the length of the minor axis, and can be quickly supplied. Is possible. Further, since the packaging bag holding arm 54 holds the packaging bag 20 from the central portion to the side portion with a gentle curve and straight line, the burden on the packaging bag 20 in the holding portion is small.

  When a plurality of types of packaging bags are filled in the powder filling device 10, the length of the linear holding portion 54 b as the pair of packaging bag holding arms 54 is the maximum size to be filled in the powder filling device 10. The length corresponding to the opening length of the packaging bag, that is, the length from one end of the linear holding portion 54b to the other end is approximately the same as or longer than the opening length of the maximum size packaging bag. Thus, various packaging bags can be similarly held by the same packaging bag holding device 52 without replacing the packaging bag holding device 52.

  As shown in FIG. 1, the holding arm opening / closing mechanism 56 swings the packaging bag holding arm 54 by a rotary cylinder 60 disposed above the filling nozzle 18, and rotates the rotary cylinder 60. The packaging bag holding arm 54 is swung to hold or open the packaging bag 20. Then, as shown in FIG. 3B, the packaging bag holding arm 54 is pressed and held so that the opening at the upper end of the packaging bag 20 is brought into close contact with the filling nozzle 18 via the pressing member 58.

  Since the holding arm opening / closing mechanism 56 is attached above the filling nozzle 18, it is not necessary to provide a support member, wiring, or the like of the holding arm opening / closing mechanism 56 around the filling nozzle 18. Therefore, a wide supply path for the packaging bag 20 to the filling nozzle 18 can be secured. In addition, since the holding arm opening / closing mechanism 56 is integrally formed with the filling nozzle 18, the powder filling amount can be measured by the weighing device 62 as will be described later.

  A measuring device 62 for measuring the weight of the powder filled in the storage bag 20 is provided at a position behind the filling nozzle 18 (on the right side in FIG. 2). This weighing device 62 measures the weight of the powder filled in the storage bag 20 held in a state suspended from the filling nozzle 18 immediately during filling. By integrally supporting the nozzle 18, the packaging bag holding device 52, and the components attached to these, the total weight thereof is measured, and the increase in weight due to powder filling is measured, whereby the storage bag 20. The weight of the powder filled in is weighed.

  The connecting member 42 made of a flexible elastic body such as rubber provided in the gap between the first screw conveyor 14 and the second screw conveyor 16 is used for measuring the filling amount by the measuring device 62. This connection member 42 is configured so that the first screw conveyor 14 does not support the weight of the second screw conveyor 16. For this reason, the connecting member 42 needs to have sufficient flexibility so that an error does not occur in the measurement value due to its rigidity. Various types of conventionally known weighing devices can be used for the weighing device 62.

  Below the packaging bag 20 held in a state suspended from the filling nozzle 18, a mounting table 66 that moves up and down and receives the packaging bag 20 filled with a predetermined amount of powder is disposed. The mounting table 66 preferably has a mechanism for receiving the packaging bag 20 filled with powder from below without impact and retracting the packaging bag 20 from the filling unit. When the filling of the powder into the packaging bag 20 from the filling nozzle 18 is completed, the mounting table 66 rises and supports the packaging bag 20. Next, the holding of the packaging bag 20 by the packaging bag holding device 52 is released. Then, the filled packaging bag 20 is transported to the next process such as heat sealing by the mounting table 66 and other transport devices.

  Here, it is desirable that the packaging bag is securely gripped by the grip for transport that constitutes the other transporting means that grips the upper part of the packaging bag and transports it to the next process such as heat sealing. A powder filling apparatus including a packaging bag holding apparatus having a shape that meets the above requirements will be described below.

FIG. 6 is a perspective view showing the vicinity of the packaging bag holding device 70 in the powder filling apparatus 100 including the packaging bag holding device 70 which is another embodiment of the packaging bag holding device 52 described above. Here, the packaging bag holding device 70 and the powder filling device 100 including the packaging bag holding device 70 described below are configured by the same components except for the packaging bag holding arm 54 that constitutes the packaging bag holding device 52 shown in FIG. .
As shown in FIG. 6, the packaging bag holding device 70 includes a packaging bag holding arm 72 that holds the packaging bag 20, and a rotary cylinder 60 that is a holding arm opening / closing mechanism that opens and closes the packaging bag holding arm 72. The

The packaging bag holding arm 72 will be described. FIG. 7A shows a side view of the packaging bag holding arm 72, and FIG. 7B shows a bottom view of the packaging bag holding arm 72.
As shown in FIG. 6 or FIG. 7, the packaging bag holding arm 72 includes a curved holding portion 74 that is curved along the filling nozzle, and a side of the filling nozzle that extends from both ends of the curved holding portion 74. A linear holding portion 76 projecting in the direction, and an auxiliary arm 78 attached to the lower surface of the linear holding portion 76 at both ends of the curved holding portion 74. The length of the linear holding part 76 protruding to the side of the curved holding part 74 is substantially the same as the length of the opening of the packaging bag 20 attached to the filling nozzle 18 projecting to the side of the filling nozzle 18, or Longer than that is desirable.

  The auxiliary arm 78 includes a support portion 80 provided substantially perpendicular to the linear holding portion 76 and a contact portion 82 extending from the support portion 80 and provided substantially parallel to the linear holding portion 76. And have. The linear holding portion 76 and the abutting portion 82 are provided with a sufficient interval so that a conveyance grip 84, which will be described later, constituting the other conveyance device grips the packaging bag 20. Further, the length of the contact portion 82 is substantially the same as the length of the opening portion of the packaging bag 20 attached to the filling nozzle 18 projecting to the side of the filling nozzle 18, similarly to the length of the linear holding portion 76. Longer than that is desirable.

  As shown in FIG. 7, a pressing member 58 made of an elastic material such as rubber is disposed on the surface where the packaging bag holding arm 72 is in contact with the packaging bag 20. Here, the pressing members 58 a and 58 b described above can be used as the pressing member 58.

  By the way, since the powder with which the packaging bag 20 is filled is deaerated or compressed by the screw conveyors 14 and 16, the fluidity thereof is often not high. Therefore, even if the pressing member 58 is not provided on the inner surface of the support portion 80 of the auxiliary arm 78, the powder being filled from the side of the filling nozzle 18 during the holding operation in which the packaging bag holding arm 72 holds the packaging bag 20. Since it is unlikely to flow into the upper part of the contact portion 82, the pressing member is not necessarily provided on the inner surface of the support portion 80.

  Further, as shown in FIG. 6, a rotary cylinder 60, which is a power source for swinging the packaging bag holding arm 72 as a holding arm opening / closing mechanism, is provided above the filling nozzle 18 and connected to the packaging bag holding arm 72. ing. By rotating the rotary cylinder 60, the packaging bag holding arm 72 can be swung, and the packaging bag 20 can be held by pressing between the filling nozzle 18 and the packaging bag holding arm 72.

  FIG. 8 is a front view showing the packaging bag holding arm 72 that holds the packaging bag 20. The packaging bag holding arm 72 of the packaging bag holding device 70 fills the central portion of the opening of the packaging bag 20 (the portion in contact with the filling nozzle 18) by holding the opening of the packaging bag 20 via the pressing member 58. The packaging bag 20 is hermetically sealed by being held in close contact with the nozzle 18 and holding a portion of the opening of the packaging bag 20 that protrudes on both sides of the filling nozzle 18 with a pair of linear holding portions 76.

  Further, the auxiliary arm 78 can prevent the powder filled in the packaging bag 20 from flowing into the upper portion of the packaging bag 20 by sandwiching the packaging bag 20. Thereby, as shown by a broken line in FIG. 8, a space for holding the packaging bag 20 by the conveyance grip 84 of other conveyance means for conveying the packaging bag 20 to the next process can be secured. Since the powder does not flow into the upper part of the packaging bag 20 and hinder the gripping operation of the conveyance grip 84, stable filling is possible. Moreover, the sealing allowance for sealing the packaging bag 20 is securable.

  Furthermore, as a result of providing the auxiliary arm 78, the size of the packaging bag 20 can be made smaller than before. Conventionally, in order for the conveyance grip 84 to securely hold a region of the packaging bag 20 that is not filled with powder, a margin is provided on the upper portion of the packaging bag 20. However, since the area where the powder in the packaging bag 20 is filled by the auxiliary arm 78 is limited, it is not necessary to allow the packaging bag 20 to have such a margin, and the packaging bag 20 can be made smaller. . Thereby, the usage-amount of the packaging material required for manufacture of the packaging bag 20 reduces, and it can reduce cost.

  At the same time, the bulk density of the powder can be increased, thereby improving the stability of the packaging bag 20 in the state where the packaging bag 20 is filled and packed in the attaching operation.

  The conveyance grip 84 shown in FIG. 8 is a conveyance grip of a known conveyance device that conveys the filled packaging bag 20 to the next process such as a heat sealing process or a shaping process. The conveyance grip 84 is retracted to a position where the filling operation is not hindered until the packaging bag 20 is supplied to the powder filling device 100 (see FIG. 6) and the filling of the powder is completed. After the filling is completed, the conveyance grip 84 grips between the linear holding portion 76 and the contact portion 82 of the packaging bag holding arm 72, and conveys the packaging bag 20 to the next process as described above.

  By the way, the auxiliary arm 78 included in the packaging bag holding arm 72 described above is configured integrally with a connecting portion between the linear holding portion 76 and the curved holding portion 74 by means such as welding. In consideration of deformation in the inside, it is also preferable that adjustment such as an angle change of the auxiliary arm 78 can be easily performed. Below, embodiment of a packaging bag holding arm provided with the auxiliary arm connected via the connection member for adjusting the angle of such an auxiliary arm is described.

  FIG. 9 is a side view showing the packaging bag holding arm 90 corresponding to the packaging bag holding arm 90 when viewed from the direction indicated by the arrow A in FIG. The packaging bag holding arm 90 has the connecting member 92 for connecting the auxiliary arm, and the packaging bag described above except that it has the auxiliary arm 94 corresponding to the auxiliary arm 78 in the packaging bag holding arm 72 shown in FIG. The configuration is the same as that of the holding arm 72.

  The connection member 92 shown in FIG. 9 is a plate-like member that is positioned and fixed on the lower surface of the linear holding portion 76 in the vicinity of the curved holding portion 74. A hole for fixing the auxiliary arm 94 with a bolt 98 is provided on the side surface of the connection member 92. In addition, a hole for fixing the support portion 96 to the connection member 92 with a bolt 98 is also provided in the upper portion of the support portion 96 provided in the substantially vertical direction that constitutes the auxiliary arm 94. These holes are provided so as to be parallel to the longitudinal direction of the linear holding portion 76 (perpendicular to the paper surface in FIG. 9). When the auxiliary arm 94 is fixed by fastening the bolt 98 to the connecting member 92, the angle of the auxiliary arm 94 is adjusted by rotating the fixed point about the axis.

  By adjusting the angle as described above, for example, when the pair of auxiliary arms 94 cannot hold the packaging bag with sufficient holding force during the holding operation of the packaging bag holding arm 90, the angle of the auxiliary arm 94 is adjusted. Then, the problem can be solved by moving the position of the auxiliary arm 94 in the direction in which the auxiliary arm 94 comes into contact with the packaging bag.

  Further, when the auxiliary arm 94 holds the packaging bag and the holding operation of the packaging bag holding arm 90 is hindered, and the packaging bag holding arm 90 cannot hold the packaging bag with a sufficient holding force, the auxiliary arm 94 performs the packaging. The problem can be solved by moving the position of the auxiliary arm 94 in the direction opposite to the direction in contact with the bag.

  In addition, since the packaging bag holding arm 90 of the present embodiment is configured so that the distance between the two pairs of auxiliary arms 94 can be adjusted, the packaging bag holding arm 90 can also be used when packaging bags of various shapes (thicknesses) are used. .

  Since the packaging bag mounting device of the present invention is configured as described above, a packaging bag having an opening having an open upper end is used, and powder is filled in the packaging bag at high speed and with high accuracy. In a powder filling apparatus capable of preventing powder scattering from the opening of the packaging bag, holding the packaging bag securely, and further supporting packaging bags of different sizes Can be provided.

  In addition, a known conveyance device for conveying the packaging bag to the next process can secure a space for securely holding the packaging bag, and at the same time, a seal margin for sealing the upper portion of the packaging bag can be secured. Furthermore, the cost can be reduced by downsizing the packaging bag. In addition, the bulk density can be increased as a result of downsizing the packaging bag.

  As mentioned above, although the mounting apparatus of the packaging bag of this invention was demonstrated in detail, it can change in the range which does not deviate from the meaning, without being limited to the above-mentioned structure.

It is a perspective view which shows an example of the powder filling apparatus which employ | adopted the mounting apparatus of the packaging bag of this invention. It is sectional drawing of the powder filling apparatus of FIG. The shape of the filling nozzle is shown, wherein (a) is a longitudinal sectional view of the filling nozzle in the major axis direction, (b) is a longitudinal sectional view of the filling nozzle in the minor axis direction, and (c) is (a) It is a bottom view of the filling nozzle corresponding to). It is typical sectional drawing which shows other embodiment of the press member 58, (a) shows the state when the packaging bag 20 is open | released, (b) is when the packaging bag 20 is hold | maintained. Indicates the state. It is typical sectional drawing which shows the press member 58b which is other embodiment of the press member 58, (a) shows the state when the packaging bag 20 is open | released, (b) hold | maintains the packaging bag 20. Indicates the state when It is a perspective view which shows the principal part of packaging bag holding | maintenance apparatus 70 vicinity. The packaging bag holding arm 72 is shown, (a) is a side view, and (b) is a bottom view. FIG. 6 is a front view showing a packaging bag holding arm 72 that holds the packaging bag 20. It is a side view which shows the packaging bag holding | maintenance arm 90. FIG. It is sectional drawing which shows the powder filling apparatus of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Powder filling device 12 Hopper 14 1st screw conveyor 16 2nd screw conveyor 18 Filling nozzle 20 Packaging bag 22 Stirrer 24 Shaft 26 Rod-shaped protrusion 28 Motor 30, 36 Outer cylinder 32, 38 Screw 34, 40 Motor 42 Connecting member 44 Filling port 46 Exhaust hole 47 Filter 48 Air chamber 49 Exhaust pump 50 Pipe 52 Packaging bag holding device 54 Packaging bag holding arm 54a Curved holding part 54b Linear holding part 56 Holding arm opening / closing mechanism 58, 58a, 58b Pressing member 59 Protrusion 60 Rotary cylinder 62 Weighing device 66 Mounting table 70 Packaging bag holding device 72 Packaging bag holding arm 74 Curved holding portion 76 Linear holding portion 78 Auxiliary arm 80 Supporting portion 82 Contacting portion 84 Carrying grip 90 Packaging bag holding arm 92 Connecting member 94 Arm 96 supporting portion 98 bolt 100 powder filling apparatus 120, 122, 124 deaeration port 120a, 122a, 124a filters 120b, 122b, 124b deaerating tube

Claims (9)

A filling nozzle for supplying powder to fill the packaging bag and a filling nozzle having an exhaust hole for discharging air supplied simultaneously with the powder from the packaging bag;
A pair of packaging bag holding arms having a shape (curved portion) in which the central portion is substantially in close contact with the outer periphery of the filling nozzle, and both end portions are shaped to protrude outward of the filling nozzle;
A holding arm opening and closing mechanism for opening and closing the pair of packaging bag holding arms,
The packaging bag mounting device, wherein the packaging bag for filling the powder is sandwiched and held between an outer periphery of the filling nozzle and the pair of packaging bag holding arms.   The packaging according to claim 1, wherein the filling nozzle has a substantially elliptical cross-sectional shape, has a circular filling port in the center, and the exhaust holes are arranged on both sides thereof. Bag mounting device. The packaging bag holding arm is attached to a lower surface in the vicinity of the curved portion of the packaging bag holding arm in contact with the filling nozzle, and sandwiches the packaging bag and fills the powder in the packaging bag. Including auxiliary arms to limit,
The packaging bag mounting device according to claim 1, wherein a part of the auxiliary arm is provided in parallel with the packaging bag holding arm.   4. A pressing member made of an elastic body that presses the packaging bag against the outer periphery of the filling nozzle is provided on the inner surface of the pair of packaging bag holding arms and / or the auxiliary arm. The packaging bag mounting device described in 1.   The packaging bag mounting device according to claim 4, wherein the pressing member is a tubular elastic body that holds the packaging bag on an outer peripheral surface thereof.   The packaging bag mounting device according to claim 4, wherein the pressing member is an elastic body having a protrusion as a slip stopper for holding the packaging bag on an outer peripheral surface thereof.   The length of the portion protruding outward of the filling nozzle in the pair of packaging bag holding arms is equal to or longer than the length protruding from the filling nozzle of the opening of the packaging bag attached to the filling nozzle. The packaging bag mounting device according to any one of claims 1 to 6.   The packaging bag mounting device according to any one of claims 1 to 7, wherein the holding arm opening and closing mechanism for opening and closing the pair of packaging bag holding arms is disposed above the filling nozzle.   9. The exhaust hole of the filling nozzle has a filter for preventing powder from being discharged together with air, and an exhaust pump for sucking air discharged through the filter. The packaging bag mounting device according to any one of the above.

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