JP5641422B2 - Synthetic resin housing - Google Patents

Description

TECHNICAL FIELD The present invention relates to a synthetic resin casing that is formed thin so that volume reduction deformation progresses as the internal pressure is reduced.

In recent years, the use of refill containers has been progressing in many applications such as detergents and food seasonings from the viewpoint of cost reduction, resource saving and environment.
Containers that are usually stored and used, and that are relatively thick and have a measuring function attached to the spout (hereinafter referred to as “continuous use containers”) are to be used continuously. Store in a new refill container and transfer to a continuous use container.

Conventionally, as this type of refill container, a so-called pouch container, which is formed into a bag shape by overlapping flexible sheet pieces, as described in Patent Document 1, for example, is often used.
Conventionally, when refilling the content liquid from the pouch container to the continuous use container, the surroundings may be soiled due to liquid splashing, liquid dripping, etc., but the pouch container described in Patent Document 1 The nozzle receiving part is arranged, and this nozzle receiving part is externally assembled to the pouring nozzle of the continuous use container so that the content liquid can be transferred, and the content liquid is transferred to the nozzle receiving part. Therefore, it is possible to eliminate the splashing and dripping of the content liquid.

JP 2003-267403 A

  Here, in the pouch container of the above-mentioned patent document 1, it is possible to hold the inverted posture for the time being by attaching the nozzle receiving portion to the pouring nozzle of the continuous use container. However, as the dispensing of the liquid progresses, the volume of the pouch container is reduced and deformed in a flat shape, so it is difficult to stably maintain the inverted posture, and the flat portion is bent and lost its balance. There is a risk of falling with the container for continuous use, and there is a problem that it is difficult to say that it is easy to use because it is necessary to monitor or support by hand while refilling.

Therefore, the present invention relates to a synthetic resin casing formed into a thin wall by blow molding, and intends to solve the problems associated with the above-described conventional refill containers, and its technical problem is to stabilize the casing as a casing. The object is to create a housing shape that can smoothly advance the volumetric deformation of the peripheral wall due to internal decompression while maintaining a proper posture.

Of the means for solving the above technical problem, the main configuration of the present invention is:
In a synthetic resin casing by blow molding having a mouth cylinder part, a tapered cylindrical shoulder part, a cylindrical trunk part and a bottom part,
The peripheral wall of the torso is formed into a thin wall that can undergo volumetric deformation as the pressure inside the housing is reduced.
Further, the peripheral wall has three edge lines formed at equal intervals in the longitudinal direction mountain fold shape, a configuration in which connecting adjacent ridge line 3 Ke panel wall,
Each panel wall is formed with a fold-like crease line that connects the upper end of one ridge line and the lower end of the other ridge line in a diagonal manner, and the three crease lines are inclined in parallel in the circumferential direction. Configure,
It is said.

  In the above configuration, by forming the peripheral wall of the body part into a thin wall that can proceed with volume reduction deformation as the pressure inside the housing is reduced, a pressing force or a twisting force is applied to the housing from the outside. Without reducing pressure inside the housing, the housing can spontaneously reduce and deform due to the pressure difference between the inside and outside, and the formation of ridge lines and crease lines stabilizes this spontaneous volume reduction deformation. This is a requirement for smooth progress while maintaining a proper posture.

  Assuming that the casing having the above configuration is used as a refill container, the casing having the above configuration, which is almost full and filled with the content liquid, is turned upside down with the mouth tube portion fixed, and the outside air is kept inside. A certain amount of content liquid can be poured out of the mouth tube portion by its own weight without intrusion.

At this time, along with the progress of the dispensing of the content liquid, the shoulder and the bottom are maintained in the original shape, and a valley-folded fold line is formed which is formed relatively thin and serves as a starting point for the depression deformation. The peripheral wall of the body part is deformed in a twisted manner, and as a result, the body part is reduced in the height direction, and the inverted posture is substantially straightened from the initial shape by the twisted deformation of the body part and the reduction in the height direction. It is possible to advance the volume reduction deformation of the housing while holding it.
For this reason, since there is no worry of the container falling down due to pouring unlike a pouch container, there is no need to support it by hand, and the refilling operation can be performed with peace of mind.

Here, the detail of the aspect of volume reduction deformation | transformation of the surrounding wall of a housing accompanying progress of extraction is demonstrated.
As the liquid content is poured out, a pressing force acts on the entire peripheral wall of the housing due to the pressure difference between the inside and outside, but each panel wall of the body wall is formed in an inclined valley fold, that is, in a depressed shape. The three crease lines are displaced so as to approach the central axis of the housing, and volume reduction deformation proceeds. At this time, each panel wall starts from the crease line and is deformed into a depressed shape so as to be folded along the crease line.

On the other hand, three mountain fold shape ridge of which is formed in the vertical direction are intended to exhibit a function as a pillar portion with respect to pressing force, the outer shape of the flat cross section of the circumferential wall to a positive triangular Holds and exhibits the function of stably holding the inverted posture of the housing even in the reduced volume deformation state.
In this case, each ridge is displaced inclined progresses depressed deformation of the panel walls along in fold eyes.
As a result, as described above, the peripheral wall of the trunk portion is deformed in a twisted manner, and the trunk portion is reduced in the height direction.

  Another configuration of the present invention is that, in the main configuration described above, the average value of the thickness of the peripheral wall of the body portion is 0.2 mm or less.

By setting the average thickness of the peripheral wall of the body portion to 0.2 mm or less with the above configuration, it is possible to smoothly achieve volume reduction deformation accompanying decompression of the inside of the housing.
In addition, about the lower limit of the wall thickness of a surrounding wall, it can set suitably from points, such as the independence of a housing.

  The average value of the thickness of the peripheral wall of the body portion is more preferably in the range of 0.05 to 0.15 mm. By making the peripheral wall of the body portion in this range, the housing It becomes possible to more smoothly and reliably achieve the volume reduction deformation accompanying the internal decompression.

Still another configuration of the present invention is that in the above main configuration, the distance / height value, which is the ratio of the distance between adjacent ridge lines and the height of the ridge lines, is in the range of 0.6 to 1.7. It is.

The above configuration relates to the inclination angle of the crease line formed on the panel wall, and the distance / height value in the range of 0.6 to 1.7 is the ridge line formed in the vertical direction. This is equivalent to setting the inclination angle of the crease line to approximately 30 ° to 60 °, and by making the inclination angle this range, both the torsional deformation of the trunk and the accompanying reduction in the height direction are sufficiently advanced. Thus, the volume-reducing deformation can be smoothly advanced while maintaining the inverted posture of the housing substantially straight.
Here, if the inclination angle is too small, that is, if the crease line is oriented in the longitudinal direction, the twist angle in the torsional deformation can be increased, but the three crease lines come into contact with each other. The reduction in the height direction is insufficient.
On the other hand, if the tilt angle is too large, that is, if the crease line is oriented in the lateral direction, the torsion angle in the torsional deformation cannot be increased, and in this case, the reduction in the height direction is insufficient.

Still another configuration of the present invention is that, in the main configuration described above, the shoulder portion has a hemispherical shell shape and the bottom portion has a bottomed short cylindrical shape.

  With the above configuration, the shoulder part has a hemispherical shell shape, and the bottom part has a bottomed short cylindrical shape. The volume reduction deformation can be progressed more smoothly while maintaining the inverted posture of the housing substantially straight.

  Still another configuration of the present invention is that, in the main configuration described above, three ridge lines are extended to the side peripheral wall of the bottom portion, and the bottom portion is formed into a bottomed short triangular tube shape by the three ridge lines. is there.

In the above configuration, the shape of the bottom portion is a bottomed short triangular tube shape in advance, so that the torsional deformation of the body portion proceeds smoothly, and the volume reduction deformation of the housing proceeds smoothly.

Still another configuration of the present invention is that, in the main configuration described above, a depressed portion is formed at the center of the bottom surface of the bottom portion by depression of the bottom wall toward the inside of the housing.

With the above configuration, by forming a depressed portion at the center of the bottom surface of the bottom portion, the ring-shaped peripheral portion remaining on the peripheral edge functions as a peripheral rib, and after pouring out the content liquid, the bottom surface of the bottom portion When the housing is crushed in the vertical direction by applying a pressing force to the body, the pressing force is dispersed at the peripheral edge, so that the body or the bottom can be smoothed while maintaining the shape of the bottom, and the shoulder or bottom can be It can be crushed sufficiently to be embedded in the part.

Since the present invention has the above-described configuration, the following effects can be obtained.
That is, in the housing having the main configuration of the present invention,
Assuming that it will be used as a refill container, as the contents of liquid are being poured out, the shoulder and bottom will retain their original shape, but will be relatively thin and will be the starting point for the deformation. The body wall where the crease line is formed deforms in a torsional shape and shrinks in the height direction, while maintaining the inverted posture from the initial shape substantially straight, while the volume reduction deformation of the housing proceeds .
For this reason, since there is no worry of the container falling down due to pouring unlike a pouch container, there is no need to support it by hand, and the refilling operation can be performed with peace of mind.

It is a front view which shows one Example of the housing of this invention. FIG. 1A is a side view, and FIG. It is a top view of the housing of FIG. It is a bottom view of the housing of FIG. FIG. 2 is a plan sectional view taken along line AA in FIG. 1. FIG. 2 is a front view showing a state in which the housing of FIG. 1 is attached to a continuous use container as a replacement container, and a state in which volume reduction deformation has progressed is partially longitudinally cut. It is a perspective view of the housing of FIG. FIG. 7 is a plan view of the housing in the deformed state of FIG. 6. It is a front view which shows the state which further crushed the housing from the state of FIG. It is a side view which shows the other Example of the housing of this invention. It is a plane sectional view along the BB line in FIG. It is a bottom view of the housing of FIG.

Hereinafter, embodiments of the synthetic resin casing of the present invention will be described with reference to the drawings along the examples.
1 to 5 show an embodiment of the housing of the present invention. FIG. 1 is a front view, FIG. 2 (a) is a side view, and FIG. 2 (b) is a rear view (in FIG. 2, a mouth tube portion). 3 is a plan view, FIG. 4 is a bottom view, and FIG. 5 is a cross-sectional plan view along line AA in FIG.
This casing 1 is a biaxially stretched blow molded product made of polypropylene resin, and has a mouth tube portion 2, a hemispherical shell-shaped tapered shoulder portion 3, a cylindrical body portion 4, and a bottomed short cylindrical bottom portion. 5 and has a total height of 125 mm, a width of 70 mm, and a capacity of 300 ml.
And the side peripheral wall 5s of the bottom part 5 is a short cylinder shape, and the recessed part 5a is formed in the center part of the bottom face by sinking the bottom face wall in the inside of the housing, and the peripheral edge part is a ring-shaped peripheral part. 5p is arranged.

In addition, three ridge lines 12 (12a, 12b, 12c) are formed on the peripheral wall of the body part 4 in a mountain-fold shape at equal intervals in the vertical direction, and the adjacent ridge lines 12 can be seen in FIG. Are connected by three panel walls 11 (11ab, 11bc, 11ca) having a circular cross section.
Further, each panel wall 11 has a fold-like crease line 13 (13ab, 13bc) that diagonally connects the upper end portion of the ridge line 12 positioned at one side end and the lower end portion of the ridge line 12 positioned at the other side end. 13ca), and these three crease lines 13 are inclined in parallel in the circumferential direction (in FIGS. 1 and 2, they are inclined from the upper right to the lower left).
For easy understanding of the deformation mode, the ridgeline 12 is shown in each drawing so that three ridgelines can be distinguished, such as 12a, 12b, and 12c, so that the drawings can correspond to each other. The same applies to the panel wall 11 and the crease line 13.

Here, the three ridge lines 12 are arranged at the vertices of a regular triangle as seen in the plan sectional view of FIG. 5, and function as pillars with respect to the lateral force acting on the housing 1. To do. Moreover, the peripheral wall of this trunk | drum 4 is formed so that it may reduce in diameter toward a center height position from an upper end and a lower end except for the ridgeline 12 part.
Moreover, in the housing 1 of the present embodiment, as seen in FIG. 1, the value of L / H, which is the ratio of the distance L between adjacent ridge lines 12 and the height H of the ridge lines 13, is approximately 1. The inclination angle D of the crease line 13 with respect to the central axis Ax is about 45 °. This inclination angle can be determined as appropriate in consideration of the shape of the casing and the volume reduction deformation of the peripheral wall of the body 4 relating to the smooth pouring of the content liquid. Is preferably in the range of 0.6 to 1.7 (30 ° to 60 ° in the case of the inclination angle D with respect to the central axis Ax).

Next, FIGS. 6 to 9 are for explaining an example in which the casing 1 of the above-described embodiment is used as the container body of the refill container A. In this description, the reduction of the casing 1 of the present invention is described. A mode of deformation will be described.
6 is a front view showing a state in which the housing 1 of FIG. 1 is mounted on the continuous use container B in an inverted posture, FIG. 7 is a perspective view of the housing whose volume is reduced and deformed in FIG. 6, and FIG. FIG. 9 is a front view showing a state in which the housing is further crushed from the volume reduction state of FIG. 6.

In this example, the refill container A is composed of a housing 1 and a coupling lid 20 attached to the mouth tube portion 2 of the housing 1.
The coupling lid 20 has an assembled cylinder 21 that is assembled and fixed to the mouth tube portion 2 of the housing 1 in a threaded manner, and a cylindrical fitting cylinder 22 is erected from the opening edge of the top wall of the assembled cylinder 21. An inner plug 24 is disposed at the upper end opening of the fitting cylinder 22 by using an engagement peripheral line 23 as shown by a two-dot chain line in the figure.

On the other hand, the continuous use container B includes a container body 30, a body cap 40 that is assembled and fixed in a liquid-tight manner to the mouthpiece 31 of the container body 30, and a push-up body 48.
The main body cap 40 has a fitting cylinder 41 to be fitted into the mouthpiece 31 of the container body 30, and a pouring opening 43 is formed in the bottom plate 42 of the fitting cylinder 41, and the above-described coupling lid 20 is formed from the opening edge. An extraction cylinder piece 44 having a C-shaped plane cross-section that is fitted on the fitting cylinder 22 is provided upright.

  Further, the push-up body 48 has a ring-like assembled ring 51, and two beam pieces 50 are horizontally extended from the assembled ring 51 to an axially symmetric position. Are assembled and fixed inside the extraction cylinder piece 44 by using the coupling rib 47 provided on the inner peripheral surface of the extraction cylinder piece 44 of the main body cap 40 to form the opening K.

Then, the refill container A in which the coupling lid 20 is attached to the casing 1 that is substantially filled with the content liquid (not shown) is set in an inverted posture, and the fitting cylinder 22 of the coupling lid 20 is inserted into the main body cap 40 of the continuous use container B. It fits into the outlet tube piece 44.
At this time, the inner plug 24 is pushed up into the fitting cylinder 22 by the pushing piece 49 of the pushing body 48, and the content liquid in the housing 1 continues to be used by its own weight through the opening K and the dispensing opening 43. Into the main body 30 of the container.

Next, the progress of the refilling of the content liquid into the above-described continuous use container B, that is, the volume reduction deformation of the casing 1 accompanying the extraction of the contents liquid from the casing 1 will be described.
Schematically, as the content liquid is dispensed from the housing 1, as shown in FIGS. The initial shape indicated by a two-dot chain line in FIG. 6 while the peripheral wall of the body 4 formed with a thin wall and formed with the crease line 13 as a starting point of the depression deformation is deformed in a torsional shape and is reduced in the height direction. Therefore, the volume reduction deformation of the housing 1 proceeds while maintaining the inverted posture substantially straight.
Here, the bottom portion 5 is rotationally displaced relative to the mouth tube portion 2 around the central axis Ax of the housing (see the white arrow in FIGS. 7 and 8) and is displaced downward.

In the state shown in FIGS. 6, 7, and 8, the bottom portion 5 is rotated about 60 ° with respect to the mouth tube portion 2.
In the initial shape of the housing 1, as shown in FIGS. 3 and 4, the planar shape of the lower end portion and the bottom portion 5 of the shoulder portion 3 is circular. However, in the state of FIG. Thus, each of the three ridge lines 12 changes to a triangle having the upper end as a vertex or a triangle close to the lower end as a vertex.
This triangular shape is less likely to be flatly deformed even when a lateral force is applied as compared to a quadrangular shape or a further polygonal shape, and the inverted posture of the housing 1 can be stably maintained.

Furthermore, the aspect of volume reduction deformation | transformation of each component of the housing 1 accompanying the above-mentioned progress of extraction is as follows.
As the internal pressure reduction progresses, a pressing force acts on the entire peripheral wall of the housing 1, but the shoulder 3 is hemispherical and the bottom 5 is thicker than the body 4. The depression deformation of each panel wall 11 in which the relatively thin wall and the valley-folded crease line 13 that is the starting point of the depression deformation is formed.

  At this time, the three crease lines 13 are displaced so as to approach the central axis Ax of the housing 1, and each panel wall 11 is folded along each crease line 13 starting from each crease line 13. Deforms into a depression. In the plan view of FIG. 8, it can be seen that the three crease lines 13ab, 13bc, and 13ca are close to the central axis Ax through the opening of the mouth tube portion 2.

On the other hand, the three mountain-folded ridgelines 12a, 12b, 12c formed in the vertical direction are inclined as clearly shown by the ridgelines 12b, 12c in FIG. However, as shown in FIG. 8, the outer shape of the flat cross section of the peripheral wall is held in a regular triangle shape even during the volume reduction deformation, and the housing 1 is also in the volume reduction deformation state. As a pillar for the force acting in the lateral direction, it exhibits the function of stably maintaining the inverted posture.

Then, due to the displacement of each ridge line 12 that is inclined with respect to the central axis Ax as described above, the bottom portion 5 is rotationally displaced relative to the mouth tube portion 2 around the central axis Ax of the housing 1. As the torsional deformation proceeds, the downward displacement of the bottom 5 proceeds.

As can be seen from FIG. 8, when the content liquid is further dispensed, the three ridge lines 12a, 12b, 12c come into contact with each other in the vicinity of the center height position, and still from the shoulder 3 to the mouth tube 2 While the content liquid is left in the part until the end, the pouring of the content liquid due to its own weight stops once, but since the casing 1 is formed thin as a whole, the bottom 5 has the white arrow in FIG. By forcibly applying a pressing force in the direction, the housing 1 can be easily crushed as shown in FIG. 9, and almost all of the content liquid can be poured out.
Further, FIG. 8 shows a state in which the bottom 5 is rotated about 60 ° with respect to the mouth tube portion 2, but when crushing the housing 1 as shown in FIG. 9, it is forcibly about 120 °. And the bottom 5 is displaced by moving the apex of the triangular bottom 5 to the apex adjacent to the triangular shoulder 3 so that the triangular shapes of the bottom 5 and the shoulder 3 match. Can be embedded in the hemispherical shell-shaped shoulder 3 and can be sufficiently crushed and the crushed state can be stably maintained, and can be discarded while maintaining the sufficiently crushed state. .

On the other hand, if the opening area of the opening K formed by the push-up body 48 of the continuous use container B is increased, after the dispensing of the content liquid by its own weight stops as described above, the inside and outside of the casing 1 Due to the pressure difference, the outside air can be made to enter the housing 1 as bubbles through the opening K, and the remaining content liquid can be poured out without forcibly acting the pressing force as described above.
In this case as well, after the content liquid is poured out, it can be discarded in a crushed state by forcibly applying a pressing force as described above.

Next, FIGS. 10 to 12 show another embodiment of the casing of the present invention, and FIG. 10 is a side view of the embodiment shown in FIGS. 1 to 5 (hereinafter referred to as the previous embodiment). 2 corresponds to FIG. 2 (a) showing a side view.), FIG. 11 is a plan sectional view taken along line BB in FIG. 10, and FIG. 12 is a bottom view, compared with the previous embodiment. The basic shape from the shoulder portion 3 to the body portion 4 is the same, and the peripheral portion 2a is disposed in the mouth tube portion 2 in place of the thread, and the bottom surface of the bottom portion 5 has a triangular shape. .
The shape of the bottom portion 5 will be described in further detail. Three ridge lines 12a, 12b, 12c formed on the body portion 4 are extended to the side peripheral wall 5s of the bottom portion 5, and the three ridge lines 12 are formed as shown in FIG. In the same manner as shown in the sectional view, the side peripheral wall 5s is connected in an arc shape to form a triangular cylinder, and the bottom 5 is formed into a bottomed short triangular cylinder.

Here, as shown in FIG. 8, in the case 1 of the previous embodiment, when a force accompanying torsional deformation is applied, the shape of the bottom 5 is circular and close to a triangle with the lower ends of the three ridgelines 12 as vertices. Change to shape,
The casing 1 of the embodiment shown in FIGS. 10 to 12 has a triangular shape in the bottom portion 6 in advance, so that the torsional deformation as shown in FIG. The deformation progresses more smoothly.
In the previous embodiment, the shape of the bottom 5 is circular as shown in FIG. 4, and in the above embodiment, it is triangular as shown in FIG. 12, but the shape of the bottom 5 is particularly limited. In addition, it may be a polygonal shape, and can be selected as appropriate in consideration of the appearance design and the posture retention and torsional deformability of the housing at the time of volumetric deformation.

As mentioned above, although embodiment of the housing of this invention and its effect were demonstrated along the Example, of course, this invention is not limited to these Examples.
The capacity of the housing is not limited to about 300 ml, and is not limited to a biaxial stretch blow molded housing made of polypropylene resin, but a biaxial stretch blow molded housing made of PET resin, or made of polyethylene resin. Direct blow molded housings and various resin blow molded products can be used.
Moreover, although the example utilized as a refill container was demonstrated in the said Example, the housing of this invention is fully crushed in the height direction after use as mentioned above, and in the state which maintained the crushing shape. It can be disposed of, and can be used as a single body by taking advantage of the features of resource saving and easy disposal.

As described above, the synthetic resin casing of the present invention is capable of smoothly progressing volume reduction deformation of the peripheral wall due to the internal decompression while maintaining the standing or inverted posture as the casing, A wide range of usage is expected for applications such as refill containers.

DESCRIPTION OF SYMBOLS 1; Housing 2; Mouth part 2a; Peripheral strip 3; Shoulder part 4; Trunk part 5; Bottom part 5a; Depression part 5s; Side peripheral wall 5p (of bottom part); Peripheral part 11 (11ab, 11bc, 11ca); Wall 12 (12a, 12b, 12c); Ridge line 13 (13ab, 13bc, 13ca); Crease line A; Refill container 20; Recombination lid 21; Assembly cylinder 22; Fitting cylinder 23; Plug B; container 30 for continuous use; container main body 31; mouth tube 40; main body cap 41; fitting tube 42; bottom plate 43; pouring opening 44; pouring tube piece 47; Piece 50; Beam piece 51; Assembly ring K; Opening

Claims (6)

In the synthetic resin casing by blow molding having the mouth tube part (2), the tapered cylindrical shoulder part (3), the cylindrical body part (4) and the bottom part (5), the peripheral wall of the body part (4) is reduced in volume deformation with the depressurization of the bottle body portion is formed into a can proceed thin, also in the peripheral wall has three ridge lines formed at equal intervals in the longitudinal direction mountain fold shape (12), The adjacent ridgelines (12) are connected by three panel walls (11), and each panel wall (11) has an upper end portion of one ridgeline (12) and the other ridgeline (12). Synthetic resin characterized by forming a valley fold crease line (13) connecting the lower end portions diagonally, and the three crease lines (13) being inclined in parallel in the circumferential direction Steel body. The synthetic resin casing according to claim 1, wherein the average thickness of the peripheral wall of the body (4) is 0.2 mm or less. Range of distance (L) / height (H), which is the ratio of distance (L) between adjacent ridgelines (11) and height (H) of ridgelines (11), in the range of 0.6 to 1.7 The synthetic resin casing according to claim 1 or 2. The synthetic resin casing according to claim 1, 2, or 3, wherein the shoulder (4) has a hemispherical shell shape and the bottom (5) has a bottomed short cylindrical shape. The three ridge lines (12) are extended to the side peripheral wall (5s) of the bottom portion (5), and the bottom portion (5) is formed into a bottomed short triangular tube shape by the three ridge lines (12). 2. A synthetic resin casing as set forth in 2 or 3. The synthetic resin slab according to claim 1, 2, 3, 4 or 5, wherein a recessed portion (5a) formed by recessing a bottom wall in an inner direction of the housing is formed at a central portion of the bottom surface of the bottom portion (5). body.

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