JP4801804B2 - Method and apparatus for filling high viscosity content - Google Patents

Description

  The present invention relates to a filling device that fills a bag with contents that are higher in viscosity and poor in fluidity than ordinary liquids, such as whipped cream, mayonnaise, and negito.

  The following Patent Documents 1 and 2 describe a method and an apparatus for filling a bottle-like container with contents such as mayonnaise having high viscosity and poor fluidity.

Japanese Patent Publication No. 48-034138 JP 52-056884 A

On the other hand, when filling the contents into a bag whose bottom portion is inclined from a horizontal plane using a conventional filling device having a vertically rising and lowering nozzle, it is installed at a position facing the center of the bag mouth as shown in FIG. The filling nozzle N is lowered vertically and inserted from the bag mouth, and is stopped when its tip comes slightly before the inclined surface of the bag bottom. That is, the tip of the filling nozzle can be inserted only at a position away from the triangular corner (acute corner) at the bottom of the bag. Then, the discharge of the contents is started at that position, and the filling nozzle N is raised as the contents accumulate in the bag (the hatched portion in the bag schematically shows how the contents accumulate in order). To show).
At this time, if the contents are high in viscosity and poor in fluidity as described above, the contents coming out from the tip of the filling nozzle and contacting the inner surface of the bag lose more fluidity, and the corners of the triangle shape The filling is completed with the air A remaining there. In addition, even if it is a normal bag with a horizontal bottom, the filling is completed with air remaining in both corners.

It was difficult to deaerate the air remaining in the bottom corner of the bag in a subsequent process, and as a result, the deaerated state was poor and the quality of the product was significantly reduced.
Accordingly, an object of the present invention is to reduce the amount of air remaining in the bottom corner of the bag when filling the bag with high-viscosity contents.

The filling method according to the present invention is a filling method in which a filling nozzle is inserted from a bag mouth that opens upward, and a high-viscosity content is discharged from the tip of the bag to fill the bag, and prior to the discharge of the content. , and sandwiched by a pair of press plates which top is concave curve as viewed perpendicularly to the holding surface from both sides of the bag corners of the bag bottom curved, pre expel air nipped corners, contents in that state It is characterized by performing the discharge.
This filling method is applied not only to a bag whose bottom is inclined from a horizontal plane, but also to a normal bag whose bottom is horizontal. In particular, when applied to the former bag, at least the acute-angle side corner of the bag bottom is sandwiched by the press member. Further, in that case, the filling nozzle is raised while discharging the contents into the bag, and the tip of the filling nozzle is substantially aligned with the center of the space in the bag from the acute-side corner of the bag bottom to the bag mouth in the ascending process. It is desirable to displace in the bag width direction.

The filling device according to the present invention is a filling device that inserts a filling nozzle from a bag mouth that opens upward, and discharges a high-viscosity content from the tip of the filling nozzle to fill the bag, from both sides of the bag. A pair of press plates that clamp the corners of the bag bottom are installed, and the press plates have a concave shape at the top when viewed perpendicular to the clamping surface, and the corners of the bag bottom are curved prior to discharging the contents. And the contents are discharged in this state .
This filling apparatus is applied not only to a bag whose bottom is inclined from a horizontal plane, but also to a normal bag whose bottom is horizontal. In particular, when the present invention is applied to the former bag, the pressing member sandwiches at least the acute angle side corner of the bag bottom. In that case, it is desirable that the filling nozzle has a form as shown in the following (1) to (3) (all of which the tip of the filling nozzle is displaced in the bag width direction). Thereby, the residual amount of air can be further reduced.

(1) The filling nozzle is installed so as to be able to move up and down, and the tip of the filling nozzle is displaced in the bag width direction so as to be substantially along the center of the space in the bag from the corner on the acute angle side to the bag mouth.
(2) The filling nozzle can freely move up and down and tilts along the bag width direction as it goes up and down, and as it goes up and down, its tilting center is displaced in the direction of tilting and at the same time its tip is displaced in the direction opposite to the tilting direction. Further, the lower the position, the greater the amount of displacement of the filling nozzle and the center of tilt, and the amount of displacement of its tip increases.
(3) The filling nozzle is installed so as to be able to move up and down, and the filling nozzle is set so as to be displaced in the bag width direction as it is raised and lowered.

  According to the present invention, when the bag is filled with high-viscosity contents, the amount of air remaining in the bottom corner of the bag can be greatly reduced, so that the quality of the product does not deteriorate.

Hereinafter, the present invention (however, the filling apparatus shown in FIGS. 1 and 2 is a reference example) will be specifically described with reference to FIGS.
A filling device 1 shown in FIG. 1 is installed at a content filling position in, for example, a well-known intermittent rotation table type bagging and packaging machine, and discharges a high-viscosity content. It comprises a device 3 and a tilting device 4 for tilting the filling nozzle 2.
The lifting / lowering device 3 includes a lifting / lowering shaft stand 6 erected on the machine base 5, a lifting / lowering shaft 7 guided and driven at a predetermined timing by a driving source (not shown) in the machine base 5, and a nozzle support fixed to the tip portion thereof. The arm 8 and the nozzle support arm 8 include an operation link 10 that is pivotally supported by a shaft 9 at a tip end portion thereof.

The tilting device 4 includes a nozzle holding member 11 fixed in the middle of the filling nozzle 2, and shafts 12 and 13 fixed so that the axial centers coincide with both sides of the nozzle holding member 11 (the shaft 12 is a lower end of the operation link 10. A bearing member 14 that rotatably supports the shaft 13, a slide unit 15 fixed thereto, and a slide rail 16 on which the slide unit 15 slides, and the filling nozzle 2 A cam roller mounting member 17 fixed to the upper end of the cam roller, a cam roller mounting shaft 18 fixed thereto, a cam roller 19 rotatably supported by the cam roller 19, a cam 20 on which the cam roller 19 rolls, and a biasing force on the cam roller 19 And a base plate mounting stand 22, a base plate 23, and the like standing on the upper surface of the machine base 5. The slide rail 16 and the cam 20 are fixed to the base plate 23 at an angle.
A filling hose 24 is attached to the side surface of the filling nozzle 2, and this filling hose 24 is connected to a supply tank (both well-known, not shown) via a valve, a cylinder, and the like.

  By the way, if the contents are high in viscosity and poor in fluidity, the contents coming out from the tip of the filling nozzle 2 and contacting the inner surface of the bag lose further fluidity, so that air is not left in the bag as much as possible. In order to achieve this, the tip of the filling nozzle 2 is inserted so that it is deep in the space of the triangular corner (acute corner) in the bag and located substantially at the center of the space. It is desirable to distribute evenly. Even in the process of ascending while discharging the contents into the bag, it is desirable that the tip of the filling nozzle always rises so as to substantially follow the center of the space in the bag. This is because the tip of the filling nozzle 2 is inserted so that the tip of the filling nozzle 2 is substantially located on the bisector a, where a is a triangle bisector in FIG. 1 and b is the left and right center line of the bag. It may be said that when rising, it rises substantially along the bisector a, and then rises substantially along the left and right center line b.

On the other hand, in this filling apparatus 1, the filling nozzle 2 is in a standby position indicated by a solid line in FIG. 1 until the bag W gripped on both edges by the gripper G is rotated to the filling position. Stands vertically and its tip is at a position (on the center line b) that faces the center of the bag mouth slightly above the bag W.
Here, when the elevating shaft 7 is lowered, the filling nozzle 2 is lowered via the nozzle support arm 8, the link 10, the nozzle holding member 11, etc., and at that time, the cam roller 19 rolls along the cam 20 and slides. The unit 15 slides along the slide rail 16. As a result, as shown by the phantom line in FIG. 1, the filling nozzle 2 is displaced in the tilting center (position of the shaft 12) in the tilting direction (left in FIG. 1), and at the same time, the tip is opposite to the tilting direction. The amount of displacement of the filling nozzle in the bag width direction increases and the amount of displacement in the bag width direction at the tip of the filling nozzle increases as it is displaced downward (right in FIG. 1) and further lowered. In this filling device 1, since the center of tilting is displaced in the direction of tilting, for example, the tilt of the filling nozzle 2 can be increased compared to the case where the center of tilting is not displaced.

By such tilting and displacement when the filling nozzle 2 is lowered, the tip of the filling nozzle 2 is lowered so as to approximately follow the center line b and the bisector a (more precisely, these At the descending end, the tip of the filling nozzle 2 is inserted deeply at the acute-angled corner of the bag W and substantially positioned on the bisector a. At the time of ascent, the contents are discharged and the trajectory is traced in the opposite direction to that at the time of descending, and is extracted from the bag mouth. In addition, in this filling device 1, since the tip (discharge port) of the lowering end of the filling nozzle 2 and the rising end thereof are always oriented substantially in the direction of the bisector a and the center line b, the discharged content Things are evenly distributed to the left and right.
The hatched portion in the bag schematically shows how the contents accumulate in order, but air A remains at the very tip of the acute angle corner as described above, but the remaining amount is smaller than in the conventional case. It can be greatly reduced.

  In the above example, the slide rail 16 and the cam 20 have a linear shape and are fixed to the base plate 23 in an angular relationship as shown in FIG. By appropriately changing, the locus of the filling nozzle 2 can be made closer to the bisector a and the center line b. Further, if the mounting angle of the slide rail 16 and the cam 20 can be changed, the locus of the filling nozzle can be adjusted in accordance with the change in the size or shape of the bag W.

  The filling device 31 shown in FIG. 2 includes a filling nozzle 2 that discharges a high-viscosity content, a lifting device 32 that raises and lowers the filling nozzle 2, and a lateral displacement device 33 that displaces the filling nozzle 2 laterally (in the bag width direction). Therefore, it has the same structure as the filling device 1 except for the lateral displacement device 33 (the same number is given to the equivalent portion). The lateral displacement device 33 includes nozzle holding members 34 and 35 fixed at a distance in the vertical direction near the upper end of the filling nozzle 2, and a parallel link support member fixed at a distance in the vertical direction near the upper end of the lifting shaft stand 6. 36, 37, a pair of parallel links 38 to 41 having one end pivotally supported by the parallel link support member and the other end pivotally supported by the nozzle holding member (the link 38 is an operating link) 10 is connected to the lower end of the pin 10 via a pin 42).

In this filling device 31, the filling nozzle 2 always stands vertically, and is in a standby position indicated by a solid line in FIG. 2 until the bag W gripped on both edges by the gripper G is rotated to the filling position, and its tip is It is in a position facing the center of the bag mouth slightly above the bag W.
Here, when the elevating shaft 7 is lowered, the parallel links 38 to 41 swing downward, and as shown by the phantom line in FIG. 2, the filling nozzle 2 is displaced in the bag width direction as it descends, and further descends. The displacement amount of the filling nozzle 2 in the bag width direction is large.

When the filling nozzle 2 is lowered, the tip of the filling nozzle 2 is lowered so as to approximately follow the center line b and the bisector a (see FIG. 1) (more accurately speaking, The tip of the filling nozzle 2 is deep at the acute corner of the bottom of the bag W and is substantially located on the bisector a. Inserted into. At the time of ascent, the contents are discharged and the trajectory is traced in the opposite direction to that at the time of descending, and is extracted from the bag mouth.
The hatched portion in the bag schematically shows how the contents accumulate in order, but air A remains at the very tip of the acute angle corner as described above, but the remaining amount is smaller than in the conventional case. Can be greatly reduced. However, during the descending end of the filling nozzle 2 and ascending from it, the tip (ejection port) does not face the direction of the bisector a, so that the ejection is performed particularly in the triangular area at the acute corner of the bag bottom. The filling device 1 is slightly superior in the uniformity of the distribution of the left and right contents.

  The filling device 51 shown in FIG. 3A and FIG. 4 is obtained by arranging a press device 52 in addition to the conventional filling device in which the filling nozzle N moves up and down vertically. The press device 52 includes a pair of press plates 53 and 54 whose upper portions are curved, and an open / close device 55 (see FIG. 4) for opening and closing the press plates. The open / close device 55 includes a support arm 56 to which the press plates 53 and 54 are fixed. 57, rotating shafts 58 and 59 fixed to the rear end thereof, gears 60 and 61 fixed to the rotating shafts 58 and 59 and meshing with each other, an air cylinder 62 for operation, and one end fixed to one rotating shaft 59. The cylinder rod includes an operating arm 63 whose other end is pivotally supported at the tip of the cylinder rod. The press plates 53 and 54 are opened and closed by the operation of the air cylinder 62.

In the example of FIG. 3 (a), the corner portion C ₂ of the corners C ₁ and the side surface of the bag bottom and sandwiched curved by a press plate 53, 54 with its upper part and concave curved as viewed perpendicularly to the clamping face, that portion These two films are brought into close contact with each other to expel air in advance, and the curved shape is devised so that no new corners are formed at the intersections C ₃ and C ₄ between the bag and the upper portions of the press plates 53 and 54. Further, since the contents are discharged by the filling nozzle 2, even clay-rich contents are easily filled in every corner. The parts sandwiched between the press plates 53 and 54 are not filled with the contents, but there is no air remaining in the parts, so for example, the contents can easily enter the parts simply by pressing the bag after sealing. Go.

On the other hand, the example of FIG. 3 (c), since the upper press plate 64, 65 has a linear configuration, although it is possible to turn off the corners C ₁ of the sharp bag bottom, the press plate 64, 65 Since the corners C ₅ and C ₆ are newly formed at the intersection of the upper part and the bag, the air A tends to remain there, which is improved over the conventional example of FIG. 6, but the effect is not so great.
In addition, the example of FIG. 3 (b) is intended for clamping the corner part C ₁ of the bag bottom is curved by a press plate 66, 67 with its upper part and concave curved as viewed perpendicularly to the holding surface. In this case, corners C ₅ and C ₆ are newly formed at the intersections between the bag and the upper portions of the press plates 66 and 67. However, since the upper portions of the press plates 66 and 67 are curved, the angle of the corners is increased. Since the amount of air remaining there is small, the effect is much greater than in the example of FIG.

  Such a pressing member can be applied not only to a bag having an inclined bottom part, but also to a bag having a normal bottom part as long as it is filled with a high clay content (both corners of the bottom part). Part).

A filling device 71 shown in FIG. 5 is obtained by further arranging a press device 72 with respect to the filling device 1. Pressing device 72 includes a pair of press plates 73 and 74 with its upper part and concave curved switchgear consists (not shown) for opening and closing it, sandwiching the acute angle side corners of the bag bottom by the press plate 73 and 74 Then, the contents are discharged by the filling nozzle 2. Due to the synergistic effect of the tilting filling nozzle 2 and the press plates 73 and 74, the residual air can be further reduced.

It is the front view and side view of a filling apparatus (reference example). It is the front view and side view of another filling apparatus (reference example). It is a filling device (a) and (b) concerning the present invention, and a filling device (c) used for comparison. It is a figure explaining the opening / closing mechanism of a press plate. It is the front view and side view of another filling apparatus which concern on this invention. It is a figure explaining the conventional filling apparatus.

Explanation of symbols

2 Filling nozzle 3, 32 Lifting device 4 Tilt device 12 Axis (tilt center)
16 Slide rail 20 Cam 33 Lateral displacement device
53, 54, 64 to 67, 73, 74 Press plate a Bisect line at the bottom corner of the bag b Center line of the bag

Claims (8)

In a filling method in which a filling nozzle is inserted from the bag opening that opens upward, and the high-viscosity contents are discharged from the tip of the bag to fill the bag, the upper part is viewed perpendicular to the sandwiching surface prior to discharging the contents. The corners of the bottom of the bag are sandwiched in a curved shape from both sides of the bag by a pair of concavely curved press plates , the air in the sandwiched corners is expelled in advance, and the contents are discharged in that state. A method for filling high-viscosity contents. 2. The method for filling a high-viscosity content according to claim 1, wherein when the bag is filled with a bottom inclined from a horizontal plane, the acute-side corner is sandwiched by the pressing member. The filling nozzle is raised while discharging the contents into the bag, and in the bag width direction so that the tip of the filling nozzle is substantially along the center of the space in the bag from the sharp corner of the bag bottom to the bag mouth in the ascending process The method for filling a high-viscosity content according to claim 2, wherein A pair of presses that sandwich the corner of the bottom of the bag from both sides of the bag in a filling device that inserts a filling nozzle from the bag opening that opens upward and discharges the high-viscosity contents from the tip of the bag to fill the bag. A plate is installed, and the press plate has a shape in which the upper part is concavely curved when viewed perpendicular to the clamping surface, and before the discharge of the contents, the corners of the bag bottom are clamped in a curved shape, A high-viscosity content filling device characterized by discharging . 5. The filling device for high-viscosity contents according to claim 4, wherein the filling device fills a bag whose bottom portion is inclined from a horizontal plane, and the pressing member sandwiches the acute angle side corner. The filling nozzle is installed so as to be able to move up and down, and with the raising and lowering, the tip of the filling nozzle is displaced in the bag width direction so as to be substantially along the center of the space in the bag from the acute corner of the bag bottom to the bag mouth. The filling device for high-viscosity contents according to claim 5. The filling nozzle can be moved up and down and tilted along the bag width direction as it goes up and down, and as it goes up and down, its tilting center is displaced in the direction of tilting, and at the same time its tip is displaced in the direction opposite to the tilting direction. 6. The filling device for high-viscosity contents according to claim 5, wherein the amount of displacement of the filling nozzle and the amount of displacement of the tilting center increases and the amount of displacement of the tip of the filling nozzle increases as it descends. The filling nozzle is installed so as to be movable up and down, and is set so that the filling nozzle is displaced in the bag width direction along with the raising and lowering, and the displacement amount of the filling nozzle becomes larger as the filling nozzle is further lowered. High viscosity filling equipment.

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