JP2009280246A - Filling nozzle for pouch container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filling nozzle for a pouch container capable of filling a highly viscous fluid filling substance into a standing pouch at an improved velocity and capable of improving productivity of the standing pouch product by preventing generation of soap bubble-like bubbles and a stringing phenomenon during and after filling and improving a filling capacity. <P>SOLUTION: The valve rod 30 has an upstream valve body part 33 which closes, at the lowermost position, an upstream valve part 61 formed in a nozzle tube 20 directly under the portion communicating with a pipeline, and an downstream valve body part 37 at the lower end which closes a downstream valve part 65 formed in the nozzle tube 20 of a spout site. In the uppermost position, the upstream valve part and the downstream valve part are opened, and the fluid filling substance supplied from the pipeline flows down into the nozzle tube to be discharged from the spout 26 intermittently. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a filling nozzle for filling a standing pouch with a filling material having fluidity.

  A bag-like container formed in a self-supporting plastic type called a standing pouch to enclose a fluid filling such as shampoo or conditioner uses less plastic than a bottle-type container, and is empty. Since the formed container can be folded or rolled, it has been widely used in recent years from the viewpoint of resource saving and garbage reduction, and is also widely used as a so-called refill pack.

  The filling facility for filling the standing pouch with the fluid filler contains the fluid filler, pressurizes and feeds the fluid filler filled, and communicates the fluid filler with the tank. And a flow meter provided on the pipeline, and a filling nozzle provided at the tip of the flow meter. The filling performed by the filling equipment is performed by inserting a filling nozzle into each standing pouch through an opening at the top of the standing pouch and then filling the inside of the standing pouch with a fluid filling. The After a certain amount is filled, the filling nozzle is pulled out from the opening at the top of the standing pouch, and then the opening is closed by heat-welding the opening, and the standing pouch is sealed to complete. It reaches. An example of a conventional filling facility is disclosed in Patent Document 1.

  However, at the tip of the filling nozzle after a certain amount of filling is completed, bubbles of bubble bubbles are often generated due to the fluid filler remaining at the tip of the filling nozzle, or the fluid filler is threaded from the tip of the filling nozzle. A so-called stringing phenomenon occurs that causes the bubbles or threads to adhere to a part of the inside of the opening of the standing pouch, and a so-called pseudo adhesion is made at the time of subsequent thermal welding of the opening, resulting in a poor seal. There was a possibility of becoming. In the standing pouch where the pseudo-adhesion has been made, when the opening at the top of the standing pouch is heat-welded, a liquid channel communicating with the inside and outside is formed in the portion where the fluid filler is attached, and the standing pouch When pressure is applied from the outside, a so-called puncture phenomenon may occur in which the fluid filler leaks out or jumps out from the liquid passage.

  Conventionally, it is said that a sealing failure due to pseudo-adhesion in a standing pouch product filled with a fluid filler such as a shampoo or a conditioner occurs at a frequency of about one in 100,000. However, in recent years, the user's preference for shampoos and conditioners has changed in the direction of increasing the viscosity of the fluid packing, and as a result, the high viscosity fluid packing produced by the conventional filling equipment has been filled. In the recent standing pouch products, the bubble bubble-like bubble generation rate and the stringing phenomenon generation rate have increased, and quasi-adhesion is tens of times that of conventional products, that is, three or four times as many as 10,000. This led to a situation where it was said that a poor seal would occur.

  In addition, the recent increase in viscosity of fluid fillers not only increases the defective product rate due to poor seals, but also reduces the fluidity due to increased viscosity, which increases the filling time required per standing pouch. This presents a problem that the filling efficiency is remarkably lowered. In other words, due to the increase in viscosity of the fluid filler, the productivity of standing pouch products tends to decrease remarkably in recent years due to an increase in defective product rate due to poor sealing and a decrease in production efficiency.

By the way, the filling nozzle in the conventional filling equipment that fills the standing pouch with the fluid filling material has a valve rod having a valve portion that can open and close the opening of the nozzle tip at the tip inside the cylindrical nozzle. It is arranged to be able to move up and down on the same axis, and is configured so that a fluid filler supplied from a pipeline communicated in a horizontal hole shape above the nozzle can be discharged intermittently from the nozzle tip. In addition, the valve stem is connected to an operating mechanism that supplies air for inflating the standing pouch while moving the valve stem up and down on the valve stem. Conventional filling nozzles configured in this way are disclosed in Patent Document 2 and Patent Document 3.
JP 2000-190942 A JP-A-9-118314 Japanese Patent Laid-Open No. 9-193914

  The present inventor conducted various studies on the filling equipment and the filling method in order to solve the conventional problems at the time of filling the high-viscosity fluid filler. First, the present inventor prepared various filling nozzles having various nozzle diameters as compared with conventional filling nozzles, and performed various measurements of the respective filling capacities. As a result, the filling nozzle with an increased nozzle diameter showed an improvement in filling speed, but no improvement in the puncture phenomenon. Therefore, the liquid temperature of the fluid packing was raised to various temperatures, and various measurement verifications of the filling capacity were performed. As a result, it was found that the viscosity of the fluid packing decreased and the filling speed was improved, but the puncture phenomenon was not improved.

  Therefore, the conventional valve opening / closing mechanism in the filling nozzle is a so-called outer valve shut-off system having a valve portion in the vicinity of the nozzle tip portion. By changing to an internal valve shut-off type valve opening / closing mechanism configured to be located in the middle part of the valve, various measurements of the filling capacity were verified. However, although the filling speed was improved by this, a stringing phenomenon occurred at the extended nozzle tip after completion of the filling, and the puncture phenomenon was not improved.

  As a result of the above research by the present inventor, if the nozzle diameter is increased, the filling speed can be increased. However, if the nozzle diameter is too large, the nozzle may come into contact with the opening of the standing pouch, causing puncture. If the liquid temperature of the fluid filler is increased, the viscosity will decrease and the fluidity will be good and the filling speed will be improved, but the bubble formation and stringing phenomenon will be suppressed. It is obvious that the thread pulling phenomenon cannot be prevented even if the fluid supply of the fluid filling material is stopped at the valve portion inside the nozzle of the filling nozzle, and the puncture phenomenon cannot be improved as a result. Became.

  The present invention has been made in view of the above problems, and has been obtained as a result of further diligent research by the present inventor, and improves the filling speed even for highly viscous fluid fillers. It can be filled into standing pouches, and it prevents bubble bubbles and stringing from occurring during and after filling, improves the filling ability and dramatically improves the productivity of standing pouch products. It is intended to provide a filling nozzle for a standing pouch that can be improved.

  Means taken by the present invention to solve the above problems is a filling nozzle for filling a pouch container with a fluid filler, the filling nozzle having a discharge port at the lower end and an up-and-down moving means at the upper end. A nozzle cylinder having a flow path in which a fluid filler flows down in a substantially vertical direction in which a pipeline in which a fluid filler is supplied is communicated with a side wall, and an upper end side is a vertical movement means. Connected and coaxially connected to the nozzle cylinder so that it can move up and down, the valve cylinder is installed in the nozzle cylinder, and it is placed just above the part where the pipeline communicates. An upstream valve body portion for closing the upstream valve portion formed in the nozzle cylinder immediately below the portion where the pipeline communicates, and a discharge port at the lower end. Close the downstream valve formed in the nozzle cylinder The upstream valve portion and the downstream valve portion are configured to open at the uppermost position, and the fluid filler supplied from the pipeline flows down into the nozzle cylinder and discharges the discharge port. It is characterized by being comprised so that it can discharge intermittently from.

  The upstream valve part is formed in a cylinder shape with the inside of the nozzle cylinder narrowed to a constant inner diameter in a constant height range, and the upstream valve body part is a piston-like shape that spreads to a constant outer diameter in a certain height range or more. In the downward movement process, it slides like a piston inside the cylinder-shaped upstream valve portion, and closes the upstream valve portion from the sliding start point to the lowest position. It is preferable.

  The occupying volume of the upstream valve body in the upstream valve section at the lowest position of the valve stem is downstream from the tip position of the downstream valve body section at the sliding start position of the upstream valve body section with respect to the upstream valve section. It is preferable that the capacity is set to be larger than the moving volume of the downstream valve body portion in the vicinity of the downstream valve body portion until the valve portion is closed.

  It is preferable that the diameter of the discharge port is set smaller than the inner diameter of the upstream valve portion.

  The tip of the valve stem is preferably recessed vertically upward.

  According to the present invention, the filling nozzle is constituted by an inner valve mechanism of two or more stages, and the occupied volume of the upstream valve body part in the upstream valve part located on the upstream side is set as the downstream valve in the downstream valve part located in the discharge port part. By setting it smaller than the volume occupied by the body part, and by setting the inner diameter of the upstream valve part to be larger than the diameter of the discharge port, the flow rate of the fluid filling material flowing downstream in the upstream of the filling nozzle, in particular, The flow rate of the fluid filler flowing down the vicinity of the discharge port is increased, and the movement speed of the fluid filler discharged from the discharge port is increased, so that the filling speed can be increased even for highly viscous fluid fillers. It is possible to fill the standing pouch with an improvement in the flow rate. Definitive occurrence of generation or stringiness of the bubble-like bubble is prevented, thereby improving the filling capacity, it is possible to dramatically improve the productivity of the standing pouch product.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings (FIGS. 1 to 3). The filling nozzle (10) of the present embodiment is for filling a standing pouch (not shown) with a fluid filler (not shown), containing the fluid filler and containing the fluid filler. A tank (not shown) that pressurizes and feeds an object, a pipeline (not shown) that communicates with the tank and allows a fluid filler to flow therethrough, and a flow meter (not shown) provided on the pipeline. It is the main component of the filling equipment arrange | positioned at the front-end | tip of the flowmeter in the equipped filling equipment.

  As shown in FIGS. 1 to 3, the filling nozzle (10) includes a substantially cylindrical nozzle cylinder (20), a valve rod (30) that can be moved up and down in the nozzle cylinder (20), a nozzle cylinder A seal body (40) that seals between the nozzle cylinder (20) and the valve stem (30) at an appropriate portion in (20) is provided.

  The nozzle cylinder (20) is composed of an upper cylinder member (21), an intermediate cylinder member (22), and a lower cylinder member (23), which are each formed in a substantially cylindrical shape, sequentially connected in the height direction, and as a whole in a substantially vertical direction. And a series of flow paths (24) through which the fluid filler flows down. However, the nozzle cylinder (20) is configured by combining three cylindrical members (21), (22), and (23), but the three cylindrical members (21), (22), and (23) are not necessarily included. For example, a substantially cylindrical nozzle cylinder may be configured by connecting two half-cylindrical members facing each other.

  At the upper end of the nozzle cylinder (20), there is a fixing portion (25) formed in a flange shape for fixing the vertical movement means (70). A discharge port (26) opened in the tube direction of the nozzle tube (20) is provided at the tip, that is, the lower end of the nozzle tube (20). The fluid filler is introduced into the nozzle cylinder (20) from the pipeline at an appropriate intermediate portion between the upper and lower ends of the nozzle cylinder (20), in the figure, at the center position in the height direction of the middle cylinder member (22). For this purpose, it has an introduction port (50) drilled in a horizontal hole shape from the outer surface of the nozzle cylinder (20). A connecting pipe (51) for connecting to the pipeline extends outward in the vertical direction with respect to the nozzle cylinder (20) at the introduction port (50). A flange (52) is formed at the distal end of the connecting pipe (51), and the flange formed at the distal end of the pipeline is brought into contact with and can be fixed.

  The portion directly above the inlet (50) inside the nozzle cylinder (20) is substantially cylindrical, the outer peripheral surface abuts on the inner peripheral surface of the nozzle cylinder (20), and the inner peripheral surface is the valve stem (30). The sealing body (40) that is in contact with the outer peripheral surface is disposed at a fixed point so as not to move. An upstream chamber (60) is formed inside the nozzle cylinder (20) at a portion where the introduction port (50) in the height direction of the nozzle cylinder (20) is formed. An upstream valve portion (61) in which the inner diameter of the nozzle cylinder (20) is narrowed is formed immediately below the introduction port (50). A midstream chamber (62) extending toward the downstream is formed immediately below the upstream valve portion (61). At the lower end of the midstream chamber (62), a midstream valve portion (63) in which the inner diameter of the nozzle cylinder (20) is narrowed is formed. A downstream chamber (64) extending in the downstream direction is formed immediately below the midstream valve portion (63). At the lower end of the downstream chamber (64), a downstream valve portion (65) in which the inner diameter of the nozzle cylinder (20) is narrowed is formed, and a discharge port (26) opened toward the cylinder direction of the nozzle cylinder (20) Is formed.

  The inner diameter of the upstream chamber (60) is set to be approximately the same as the inner diameter of the middle flow chamber (62), and the height is set to about a quarter of that of the middle flow chamber (62). The inner diameter of the downstream chamber (64) is set to about half of the inner diameter of the middle flow chamber (62), and the height is set to be approximately equal to the height of the upstream chamber (60).

  The upstream valve part (61) is formed in a trapezoidal bank shape from the inner peripheral surface of the nozzle cylinder (20) to the center in the radial direction, and has a circular shape, and the inner diameter of the nozzle cylinder (20) is within a certain height range. It is narrowed to a certain extent and configured in a cylinder shape. The middle flow valve portion (63) is formed by narrowing both the outer diameter and the inner diameter of the nozzle cylinder (20) in the vicinity of the lower end portion of the middle flow chamber (62). The inner diameter of the midstream valve portion (63) is set slightly narrower than the inner diameter of the upstream valve portion (61). The downstream valve portion (65) is formed by reducing both the outer diameter and inner diameter of the nozzle cylinder (20) in the vicinity of the lower end portion of the downstream chamber (64). The inner diameter of the downstream valve portion (65) is set slightly narrower than the inner diameter of the midstream valve portion (63). The diameter of the discharge port (26) is set slightly narrower than the inner diameter of the upstream valve portion (61).

  The valve stem (30) has a length that is set somewhat shorter than the length of the nozzle cylinder (20), and has a portion with a different outer diameter at an appropriate portion in the longitudinal direction and has a suitable undulation. It is a member. The valve stem (30) includes a coupling portion (31) coupled to the coupling means (72) provided at the lower end of the vertical movement portion (71) of the vertical movement means (70) from the upper end, and the coupling portion (31). From the upper shaft portion (32) extending directly downward and the upstream valve body portion (33) formed at the lower end of the upper shaft portion (32), and the lower end of the upstream valve body portion (33) A middle shaft portion (34) extending downward, a middle flow valve body portion (35) formed at the lower end of the middle shaft portion (34), and a lower end of the middle flow valve body portion (35). It has a lower shaft portion (36), a downstream valve body portion (37) formed at the lower end of the lower shaft portion (36), and a recess (38) formed at the lower end.

  The upper shaft portion (32) has a constant outer diameter set thicker than the middle shaft portion (34). The middle shaft portion (34) is set to be thicker than the lower shaft portion (36). The most detailed part of the upstream valve body part (33) is set to be thinner than the middle shaft part (34) and thicker than the most detailed part of the midstream valve body part (35).

  As shown in FIG. 1, the valve stem (30) has an upstream valve body portion (33) that opens the upstream valve portion (61) of the nozzle barrel (20) at the uppermost position in the nozzle barrel (20). The valve body part (35) is configured to open the middle flow valve part (63) of the nozzle cylinder (20), and the downstream valve body part (37) is configured to open the downstream valve part (65) of the nozzle cylinder (20). The The valve stem (30) is closed by the upstream valve body portion (33) sliding in the piston shape inside the upstream valve portion (61), as shown in FIG. Is in the starting position for sliding and closing the upstream valve portion (61), the middle flow valve body portion (35) is in a state in which the middle flow valve portion (63) is opened, and the downstream valve body portion (37 ) Is configured to open the downstream valve section (65). As shown in FIG. 3, the valve stem (30) closes the upstream valve part (61) of the nozzle cylinder (20) at the lowest position in the nozzle cylinder (20). The midstream valve body (35) closes the midstream valve section (63) of the nozzle cylinder (20), and the downstream valve body section (37) closes the downstream valve section (65) of the nozzle cylinder (20). Configured.

  Further, the filling nozzle (10) of the present embodiment has an upstream valve body part (61) in the upstream valve part (61) at the lowest position in the nozzle cylinder (20) of the valve rod (30) shown in FIG. 33) the occupied volume V of the downstream valve body portion (37) from the tip position of the downstream valve body portion (37) at the sliding start position of the upstream valve body portion (33) with respect to the upstream valve portion (61) shown in FIG. 37) is set larger than the moving volume v by the tip of the downstream valve body part (37) in the vicinity of the downstream valve body part (37) until the downstream valve part (65) is closed.

  The vertical movement means (70) disposed in the fixed portion (25) at the upper end of the nozzle cylinder (20) can move the vertical movement portion (71) up and down at a predetermined speed at a predetermined timing. As long as it is configured as described above, it is not particularly limited.

  Since the filling nozzle (10) of the present embodiment is configured as described above, the flowable filler supplied from the pipeline is connected to the flow path in the nozzle cylinder (20) via the connecting pipe (51) ( 24), when the vertical movement means (70) moves up and down at a predetermined timing, the valve stem (30) connected to the vertical movement section (71) of the vertical movement means (70) is lowered from the uppermost position. When the upper shaft portion (32) is lowered, the volume of the upstream chamber (60) is narrowed, and the fluid filling material stored in the upstream chamber (60) is sent out to the middle flow chamber (62).

  When the valve stem (30) is lowered from the position shown in FIG. 1 to the position shown in FIG. 2, the upstream valve body part (33) becomes a starting position for closing the upstream valve part (61), and the upstream chamber (60) And the midstream chamber (62) are isolated. When the valve stem (30) is further lowered from this state, the upstream valve body portion (33) slides on the upstream valve portion (61) and descends like a piston, so that the flow sent to the midstream chamber (62) The flowable packing is sent to the downstream chamber (64), and the fluid packing sent to the downstream chamber (64) is distributed to the outside through the discharge port (26).

  At this time, the flowable packing that flows down around the upstream valve part (61) and in the middle flow chamber (62) has a volume of the flow path (24) around them in the downstream chamber (64) and the downstream valve part ( 65) The flow rate is slow because it is relatively larger than the volume of the flow path (24) in the periphery, but the flow rate of the fluid packing that flows down in the downstream chamber (64) and the downstream valve part (65) is relatively low. Get faster. Therefore, the discharge speed of the fluid filler distributed to the outside from the discharge port (26) is increased as compared with the conventional filling nozzle.

  When the valve stem (30) is lowered from the position shown in FIG. 2 to the position shown in FIG. 3, the midstream valve body (35) closes the midstream valve section (63) and the downstream valve body (37) is downstream. Since the valve part (65) is closed, the flow toward the downstream of the fluid filler in the flow path (24) in the nozzle cylinder (20) stops, and the discharge of the fluid filler from the discharge port (26) also stops. . At this time, since the fluid filling material that has been discharged at high speed is vigorously stopped, the discharge is stopped with good liquid breakage. Furthermore, since a recess (38) that is curved and recessed upward is formed at the lower end of the valve stem (30), the fluid filler remaining near the center of the tip of the valve stem (30) However, since it spreads over a wider contact area between the distal end periphery of the valve stem (30) and the discharge port (26), it becomes difficult to dripping and the stringing phenomenon is prevented.

  When the valve stem (30) rises, the fluid filler is again supplied from the pipeline into the nozzle cylinder (20). Thus, the filling nozzle (10) of the present embodiment intermittently allows the fluid filler supplied from the pipeline to flow from the lower discharge port (26) in conjunction with the vertical movement cycle of the valve stem (30). The fluidized filler can be filled in the standing pouch at high speed while preventing the sealing failure.

  As described above, the filling nozzle (10) for a pouch container of the present invention is provided with an inner valve mechanism having two or more stages, and the occupied volume of the upstream valve body part (33) in the upstream valve part located on the upstream side is reduced. In addition, the downstream valve body portion (37) in the downstream valve portion located at the discharge port (26) portion is set smaller than the volume occupied by the downstream valve body portion (37), and the inner diameter of the upstream valve portion (61) is set to be smaller than the diameter of the discharge port (26). By setting it large, the flow velocity of the fluid packing flowing down in the vicinity of the discharge port (26) is made faster than the flow velocity of the fluid packing flowing down in the upstream in the filling nozzle (10), and the discharge port (26) is configured to increase the speed of movement of the fluid filler discharged from the present invention, and can be implemented in various forms without departing from the gist thereof.

It is a figure which shows the structure of the filling nozzle of this embodiment, and is sectional drawing which shows the state which has the position of the valve stem in a nozzle cylinder in the uppermost part. It is sectional drawing which shows the state which has the position of the valve stem in the nozzle cylinder in an intermediate part. It is sectional drawing which shows the state which has the position of the valve stem in the nozzle cylinder in the lowest part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Filling nozzle 20 Nozzle cylinder 21 Upper cylinder member 22 Middle cylinder member 23 Lower cylinder member 24 Flow path 25 Fixed part 26 Discharge port 30 Valve rod 31 Joint part 32 Upper shaft part 33 Upstream valve body part 34 Middle shaft part 35 Middle flow valve body Part 36 lower shaft part 37 downstream valve body part 38 recess part 40 seal body 50 introduction port 51 connecting pipe 52 flange 60 upstream chamber 61 upstream valve part 62 intermediate flow chamber 63 intermediate flow valve part 64 downstream chamber 65 downstream valve part 70 vertical movement means 71 Vertical movement part 72 Coupling means

Claims (5)

  A filling nozzle for filling a pouch container with a fluid filling material, wherein the filling nozzle has a discharge port at a lower end, a vertically moving means is disposed at an upper end, and a fluid filling material is supplied to a side surface. A nozzle cylinder having a substantially vertical tube shape in which the line communicates and having a flow path in which the fluid filling material flows down, and an upper end side connected to the vertical movement means are movable up and down on the same axis as the nozzle cylinder. A substantially vertically long valve rod, which is housed in the nozzle cylinder, and a seal body which is disposed immediately above the portion where the pipeline communicates and seals between the nozzle cylinder and the valve rod. The valve stem has, at its lowest position, an upstream valve body portion for closing the upstream valve portion formed in the nozzle cylinder immediately below the portion where the pipeline communicates, and the discharge port portion at the lower end. Downstream valve formed in the nozzle cylinder A downstream valve body portion that is closed, and configured to open the upstream valve portion and the downstream valve portion at the uppermost position, and the fluid filler supplied from the pipeline is provided in the nozzle cylinder. A filling nozzle for a pouch container configured to flow down and be discharged intermittently from the discharge port.   The upstream valve portion is formed in a cylindrical shape in which the inside of the nozzle cylinder is narrowed to a constant inner diameter in a certain height range, and the upstream valve body portion spreads to a certain outer diameter in a height range above a certain height. In the downward movement process, it slides like a piston in the cylinder-shaped upstream valve section, and closes the upstream valve section from the sliding start point to the lowest position. The filling nozzle for a pouch container according to claim 1, wherein the filling nozzle is configured to do so.   The occupied volume of the upstream valve body portion in the upstream valve portion at the lowest position of the valve stem is from the tip position of the downstream valve body portion at the sliding start position of the upstream valve body portion with respect to the upstream valve portion. 3. The pouch according to claim 2, wherein the downstream valve body portion is set to have a larger capacity than a moving volume by a tip of the downstream valve body portion in the vicinity of the downstream valve body portion until the downstream valve portion is closed. Filling nozzle for containers.   The filling nozzle for a pouch container according to any one of claims 1 to 3, wherein a diameter of the discharge port is set smaller than an inner diameter of the upstream valve portion.   The filling nozzle for a pouch container according to any one of claims 1 to 4, wherein the tip of the valve stem is recessed vertically upward.

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