JP5883724B2 - Bottle-type container and manufacturing method thereof - Google Patents

Description

  The present invention relates to a pinch grip type bottle-type container and a method for manufacturing the same.

Conventionally, as described in, for example, Patent Document 1 below, a mouth portion, a shoulder portion, a body portion, and a bottom portion are integrally formed along the bottle shaft, and among the body portions, the bottle shaft is sandwiched in the radial direction. A pinch grip type bottle-shaped container is known in which a pair of finger contact recesses are formed in side regions facing each other.
In this bottle-type container, a plate-like support member that connects the pair of finger contact recesses is provided inside the trunk, and the user puts a thumb in one of the pair of finger contact recesses, When a finger other than the thumb is put on the other side and the bottle-shaped container is gripped so that the back area of the trunk (the peripheral wall portion of the trunk located between the pair of finger rests) is covered with a palm, It is suppressed that a part deform | transforms into the direction which these recessed parts for finger contact oppose, and it is suppressing that the holding | grip attitude | position of a bottle type container becomes unstable.

Japanese Patent No. 3179714

  However, in the conventional bottle-type container described above, the rigidity of the back surface region in the body portion is not ensured, and the body portion may be deformed.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the bottle-type container which suppresses a deformation | transformation of a trunk | drum, and can be hold | gripped stably, and its manufacturing method.

In order to solve the above problems, the present invention proposes the following means.
According to the present invention, a mouth portion, a shoulder portion, a body portion, and a bottom portion are integrally formed along the bottle shaft, and a pair of finger rests are provided on side regions of the body portion that face each other across the bottle shaft in the radial direction. A pinch grip type bottle-shaped container in which concave portions for use are respectively formed, and a rear region located between a pair of the finger rest concave portions of the trunk portion is radially inward from a peripheral wall of the trunk portion. Reinforcing ribs that protrude toward the surface and extend in the circumferential direction are formed, and both end portions in the circumferential direction of the reinforcing ribs are respectively connected to the pair of finger contact recesses.

When the contents of the bottle-shaped container are poured out from the mouth, the user puts a thumb in one of the pair of finger rests formed on the trunk and puts a finger other than the thumb in the other. Then, hold the bottle-shaped container so that the back area of the trunk is covered with palms.
According to the bottle-shaped container of the present invention, the reinforcing ribs are formed in the back region of the trunk portion, and the reinforcing ribs are respectively connected to the pair of finger resting recesses. While the deformation of the bottle due to relative movement is restricted, the rigidity of the back area is also improved, the rigidity of these finger rests and the back area gripped by the user is sufficiently secured, and the deformation of the entire body part Is suppressed, and the bottle-type container can be stably held.

  Further, in the bottle-type container of the present invention, the shape of the longitudinal section of the reinforcing rib extends from the peripheral wall of the barrel portion toward the radially inner side, and then is folded back and extends toward the radially outer side. It may be connected to the peripheral wall.

  In this case, since the reinforcing rib has a folded shape that is folded so as to be overlapped in the bottle axial direction, for example, the bottle-shaped container can be easily manufactured. Specifically, in the manufacture of the bottle-type container, when the preform is biaxially stretch blow-molded, the pair of pushing molds for forming a pair of finger contact recesses move toward each other, and these pushing molds When the mold comes into contact with the preform in the middle of stretching, the contact portion is cooled and hardened from other portions, and the amount of stretching in the subsequent radial direction is suppressed, whereby the above folded shape is formed. Therefore, for example, a bottle-shaped container provided with the reinforcing rib can be easily manufactured without using a special preform shape as in Patent Document 1 (Japanese Patent No. 3179714) described above.

  Furthermore, in this case, since it is easy to suppress the occurrence of a large difference between the thickness of the peripheral wall of the trunk portion and the thickness of the wall portion of the reinforcing rib, the difference in thickness between the peripheral wall of the trunk portion and the vicinity of the reinforcing rib after molding. Occurrence of distortion, such as shrinkage, is suppressed, and the appearance quality of the bottle-type container can be stabilized.

  In the present invention, the mouth portion, the shoulder portion, the body portion, and the bottom portion are integrally formed along the bottle shaft, and a pair of side regions facing each other across the bottle shaft in the radial direction are provided. A method for manufacturing a pinch grip type bottle-shaped container in which finger contact recesses are respectively formed, comprising a blow molding step of biaxially stretching blow-molding a bottomed cylindrical preform, wherein in the blow molding step, Before the stretching of the preform in the radial direction is finished, the pair of pushing molds for forming the pair of finger contact recesses are moved close to each other, and the portion of the preform that is in contact with the pushing molds In the back region located between the pair of the finger rest recesses in the body portion, the inner wall is radially inward from the peripheral wall of the body portion. Protruding and surrounding Extending along a direction, and forming a reinforcing rib end portions in the circumferential direction are respectively connected to the pair of the finger rest recess.

  According to the method for manufacturing a bottle-shaped container of the present invention, the biaxial stretch blow molding is performed using a general bottomed cylindrical preform without using a special preform shape. It is possible to easily form the reinforcing ribs that exhibit the advantageous effects.

  Moreover, in the manufacturing method of the bottle type container of the present invention, the center position between the pressing surfaces facing each other in the pair of pressing molds may be arranged on the bottle back side from the preform shaft.

  In this case, it is possible to reliably form the reinforcing rib in the back region of the trunk portion, not in the front region of the trunk portion, between the pair of finger rest recesses formed by the pair of pressing molds. Moreover, since these finger contact recesses are arranged close to each other on the back side of the bottle, the bottle-shaped container can be easily grasped and the contents can be easily poured out even when the palm of the user is small.

  Further, in the manufacturing method of the bottle-type container of the present invention, in the cross-sectional view orthogonal to the preform axis, the pushing surfaces facing each other in the pair of pushing molds set as the advance end positions of the approaching movements, It is good also as arrange | positioning so that the outer peripheral surface of a preform may mutually cross.

  In this case, when the preform is biaxially stretch blow-molded, the preform can be brought into contact with the indentation mold from the early stage of stretching, whereby the portion of the preform in contact with the indentation mold is stretched. It is possible to ensure a large difference between the amount and the stretching amount of other parts. That is, the length of the reinforcing rib in the radial direction determined by the difference in the amount of stretching can be sufficiently secured, and the rigidity of the reinforcing rib is improved and the rigidity of the entire trunk portion is increased.

According to the bottle-type container according to the present invention, it is possible to suppress the deformation of the body portion and to stably hold it.
Moreover, according to the manufacturing method of the bottle type container which concerns on this invention, the above-mentioned bottle type container can be manufactured easily.

It is a front view which shows the bottle-shaped container which concerns on one Embodiment of this invention. It is a side view of the bottle type container of FIG. It is a rear view of the bottle type container of FIG. It is a cross-sectional view which shows the AA cross section of FIG. It is a longitudinal cross-sectional view in the C section of FIG.

Hereinafter, a bottle container 1 according to an embodiment of the present invention will be described with reference to the drawings.
The bottle-type container 1 of the present embodiment is formed of a synthetic resin such as polyethylene terephthalate (PET) and has a bottomed cylindrical shape as shown in FIGS. The mouth part 2, the shoulder part 3, the trunk part 4, and the bottom part 5 are integrally formed.
In addition, the center axis of these mouth part 2, shoulder part 3, trunk | drum 4, and bottom part 5 is arrange | positioned on the common axis. In the present embodiment, this common axis is called a bottle axis O, the mouth 2 side along the bottle axis O direction is called the upper side, and the bottom 5 side is called the lower side. A direction perpendicular to the bottle axis O is referred to as a radial direction, and a direction around the bottle axis O is referred to as a circumferential direction.

  The bottle-type container 1 of this embodiment is a blow-molded product obtained by biaxially stretching and blowing a preform formed by injection molding, and contents such as beverages are accommodated inside the container. The bottle-type container 1 is a large-capacity type whose internal capacity is, for example, 2.7 liters or 4 liters.

The mouth part 2 has a cylindrical shape and has a diameter smaller than that of the shoulder part 3, the body part 4 and the bottom part 5 other than the mouth part 2 of the bottle-type container 1. The opening of the mouth 2 serves as a spout for pouring the contents of the bottle-type container 1.
A male screw portion 2 a is formed at least at the upper end portion of the outer peripheral surface of the mouth portion 2. The male screw part 2a of the mouth part 2 is adapted to be screwed with a female screw part in a cap-shaped cylindrical cap (not shown), whereby the cap is detachably attached to the mouth part 2, The spout of the mouth 2 is sealed.

The lower end portion connected to the shoulder portion 3 in the mouth portion 2 is a neck portion 2b, and the outer diameter D of the neck portion 2b shown in FIG. 4 is the value before and after the preform is subjected to biaxial stretch blow molding. Is not changing.
In FIG. 1 to FIG. 3, an annular neck ring 2 c that protrudes radially outward and extends in the circumferential direction between the male screw portion 2 a and the neck portion 2 b in the outer peripheral surface of the mouth portion 2. Is formed.

  The shoulder portion 3 has a cylindrical shape that is gradually expanded in diameter from the mouth portion 2 toward the trunk portion 4 side, and a plurality of panel surfaces 3a each having a substantially trapezoidal plane are formed on the outer peripheral surface thereof. Arranged in the circumferential direction. Further, linear ridge line portions 3b are formed between the panel surfaces 3a adjacent to each other in the circumferential direction, and the ridge line portions 3b gradually extend outward in the radial direction toward the lower side. .

  The trunk portion 4 has a cylindrical shape, and the upper end portion that is continuous with the shoulder portion 3 and the lower end portion that is continuous with the bottom portion 5 on the outer circumferential surface of the trunk portion 4 are recessed radially inward and along the circumferential direction. An extending annular groove 4a is formed.

The region sandwiched between the pair of upper and lower grooves 4a on the outer peripheral surface of the body portion 4 includes a front region F on which product labels and the like are displayed, a rear region B facing the opposite side of the front region F in the radial direction, and these front regions. F and a pair of side surface regions S located between the rear region B. That is, the front area F, one side area S, the back area B, and the other side area S are arranged in this order along the circumferential direction on the outer circumferential surface of the body portion 4.
In the following description, the front area F side along the radial direction of the body part 4 is referred to as a front side, and the back area B side is referred to as a rear side.

The front region F of the outer peripheral surface of the body 4 has a convex arc shape in a cross section perpendicular to the bottle axis O, and specifically, a cylindrical surface shape or a cylinder suitable for sticking and displaying a product label or the like. It is assumed to be planar.
In addition, a pair of finger contact recesses 6 is formed in the side surface regions S facing each other across the bottle axis O in the radial direction on the outer peripheral surface of the body 4 (that is, back to back). The bottle-type container 1 is a pinch grip type bottle-type container that allows a user to insert and hold a finger in the finger contact recess 6.

  In FIG. 2, the finger contact recess 6 is arranged to be biased toward the back surface region B side from the center in the circumferential direction in the side surface region S. The finger rest recess 6 includes a bottom wall 6a that is recessed most radially inward in the finger rest recess 6 to form the deepest portion and faces radially outward, and an upper wall that continues to the upper side of the bottom wall 6a and faces downward. 6b, a lower wall 6c that continues to the lower side of the bottom wall 6a and faces the upper side, a front wall 6d that continues to the front side of the bottom wall 6a and faces the rear side, and a rear wall 6e that continues to the rear side of the bottom wall 6a and faces the front side 2 is a rectangular frame surrounding the bottom wall 6a, the upper wall 6b, the lower wall 6c, the front wall 6d, and the rear wall 6e, and the outer peripheral surfaces of the walls 6a to 6e and the trunk portion 4 in a side view shown in FIG. And a guide wall 6f composed of a curved surface and a flat surface.

In the side view shown in FIG. 2, the bottom wall 6a has a rectangular shape that is long in the bottle axis O direction, and the bottom wall rib 7 that extends along the width direction is formed on the bottom wall 6a. . 2 and 4, a plurality of bottom wall ribs 7 project outward in the radial direction, and a plurality of bottom wall ribs 7 are formed at intervals in the bottle axis O direction.
In the cross-sectional view shown in FIG. 4, the distance L between the bottom walls 6 a of the pair of finger contact recesses 6 is smaller than the outer diameter D of the neck portion 2 b of the mouth portion 2.

  The upper wall 6b and the lower wall 6c have a rectangular shape, and are opposed to each other with a space in the direction of the bottle axis O in FIG. 2, and are formed to be perpendicular to the bottle axis O. The upper wall 6b and the lower wall 6c may be formed so as to be gradually inclined upward or downward and inclined with respect to the bottle axis O as they go radially outward.

2 and 4, the front wall 6d is formed in a rectangular shape that is long in the bottle axis O direction, and the width direction thereof is arranged along the radial direction. The rear wall 6e is disposed on the rear side of the front wall 6d with a space therebetween and is formed in a rectangular shape parallel to the front wall 6d. The front wall 6d and the rear wall 6e may be inclined so as to gradually increase or decrease the distance from each other toward the outside in the radial direction, and may be made non-parallel to each other.
In the present embodiment, the bottom wall 6a, the upper wall 6b, the lower wall 6c, the front wall 6d, and the rear wall 6e of the finger resting recess 6 are each formed with a concave curved surface in the connecting portion with the adjacent walls 6a to 6e. Has been.

  As shown in FIGS. 2 to 5, the back surface region B located between the pair of finger rest recesses 6 in the body portion 4 is directed radially inward from the peripheral wall 4 b of the body portion 4. Reinforcing ribs 8 that protrude and extend along the circumferential direction are formed. Both ends of the reinforcing rib 8 in the circumferential direction are connected to the pair of finger contact recesses 6, respectively.

  In the present embodiment, the width of the reinforcing rib 8 along the radial direction is substantially constant along the circumferential direction in the cross-sectional view shown in FIG. Further, both ends of the reinforcing rib 8 in the circumferential direction are connected to the rear wall 6e of the finger resting recess 6.

  In the example shown in FIG. 2, the reinforcing rib 8 is disposed at the center of the finger rest recess 6 along the bottle axis O direction, but is not limited thereto, and the finger rest recess 6 of the finger rest 6 is not limited thereto. You may arrange | position in site | parts (for example, the upper end part and lower end part of the recessed part 6 for finger rests) other than a center part. Further, in the rear view shown in FIG. 3, the reinforcing rib 8 is formed so as to be perpendicular to the bottle axis O. However, the present invention is not limited to this. For example, the reinforcing rib 8 is inclined with respect to the bottle axis O. Or may have a curved shape that is convex upward or downward in the rear view.

As shown in FIG. 5, the shape of the longitudinal section of the reinforcing rib 8 extends from the peripheral wall 4 b of the trunk portion 4 toward the radially inner side, and then is folded back to extend radially outward. It continues to the peripheral wall 4b.
Specifically, the reinforcing rib 8 of the present embodiment is disposed so as to be superimposed on the lower side of the upper plate 8a and the upper plate 8a protruding radially inward from the peripheral wall 4b, and radially inward from the peripheral wall 4b. And a connecting portion 8c for connecting the radially inner ends of the upper plate 8a and the lower plate 8b.

  1 to 3, the bottom 5 has a bottomed cylindrical shape, and the surface facing the lower side of the bottom wall 5 a is the seating surface of the bottle-type container 1. The center portion of the bottom wall 5a is recessed upward from the outer peripheral edge around the center portion.

Next, the manufacturing method of the bottle type container 1 mentioned above is demonstrated.
The manufacturing method of the bottle-type container 1 includes a blow molding step of biaxially stretching blow-molding a bottomed cylindrical preform. In FIG. 4, as described above, the outer diameter D of the neck portion 2b of the mouth portion 2 does not substantially change before and after blow molding, so this outer diameter D is equal to the outer diameter of the preform. It has become. The center axis (preform axis) of the preform is coaxial with the bottle axis O of the bottle-type container 1 formed by blow-molding the preform.

  In the blow molding step, before the preform is stretched in the radial direction, the pair of pressing dies 20 for molding the pair of finger contact recesses 6 are moved closer to each other, and among these preforms, By suppressing the amount of stretching of the portion in contact with the pressing mold 20 to be less than the amount of stretching of other portions, the body portion is formed in the back surface region B located between the pair of finger resting recesses 6 in the body portion 4. The reinforcing ribs 8 project radially inward from the peripheral wall 4b and extend along the circumferential direction, and both ends in the circumferential direction are connected to the pair of finger resting recesses 6, respectively. .

The blow molding process will be described in detail. In FIG. 4, before the preform is stretched, the pushing mold 20 is retracted radially outward.
Next, although not particularly illustrated, the stretching rod inserted into the preform from the preform mouth portion makes the front end abut the preform bottom, while the preform is placed along the preform axis O direction. When the preform bottom reaches a position corresponding to the push mold 20 along the preform axis O direction or a position beyond the push mold 20, the preform is moved to the side. Air blow is used to stretch in the radial direction. In the following process, the stretching rod is moved forward toward the bottom of the preform until its tip abuts against the inner wall of the cavity mold through the bottom wall of the preform.

  In FIG. 4, during the air blow, the pushing molds 20 are advanced toward the inside in the radial direction so that the pair of pushing molds 20 are moved closer to each other. Here, the center position between the pressing surfaces 20 a facing each other in the pair of pressing dies 20 is arranged on the bottle back side (back region B side) from the preform axis O. Further, in a cross-sectional view orthogonal to the preform axis O in FIG. 4, the pressing surfaces 20a facing each other in the pair of pressing dies 20 set as the forward end positions of the close movements (the finger contact recesses 6 in FIG. 4). Of the bottom wall 6a) and the outer peripheral surface of the preform (corresponding to the outer peripheral surface of the neck portion 2b and the extended portion directed downward thereof) are arranged so as to intersect each other.

  The preform that is in the process of being stretched radially outward by air blow is cooled by abutting against the pressing mold 20, whereby the abutting portion of this preform (hereinafter referred to as a preform abutting portion) The preform becomes harder and thicker than a portion other than the contact portion (hereinafter referred to as another portion). Therefore, the stretch amount in the radial direction of the preform contact portion is suppressed more than the stretch amount of other portions.

  On the other hand, the other part is extended outward in the radial direction and abuts against the inner wall of the cavity mold. When the other part comes into contact with the cavity mold in this way, movement in the preform axis O direction at the preform contact part sandwiched from above and below by the other part in contact is restricted.

  Since the preform contact portion is hard and thick, stretching in the radial direction is largely suppressed or stopped before contacting the inner wall of the cavity mold. Other portions located on both sides of the portion in the preform axis O direction are extended so as to sandwich the preform contact portion from above and below, and as a result, the above-described folded shape of the reinforcing rib 8 is formed.

  Next, when the air blow of the preform is continued, the portion corresponding to the upper plate 8a of the reinforcing rib 8 and the portion corresponding to the lower plate 8b are overlapped in the direction of the preform axis O, so that the shape of the reinforcing rib 8 described above is obtained. The bottle-type container 1 is formed. A part of the preform abutting portion constitutes a connecting portion 8 c located on the innermost radial direction of the reinforcing rib 8. On the other hand, the preform abutting portion constitutes the outer peripheral edge portion (connecting end with the peripheral wall 4b) of the upper plate 8a and the lower plate 8b of the reinforcing rib 8 because the stretch amount is suppressed as described above. It has become difficult.

When the contents of the bottle-shaped container 1 of the present embodiment described above are poured out from the mouth portion 2, the user puts a thumb in one of the pair of finger rest recesses 6 formed in the body portion 4. Then, a finger other than the thumb is put on the other side, and the bottle-shaped container 1 is gripped so that the back surface region B of the trunk portion 4 is covered with a palm.
According to the bottle-shaped container 1 of the present embodiment, the reinforcing rib 8 is formed in the back surface region B of the trunk portion 4, and the reinforcing rib 8 is connected to the pair of finger rest recesses 6, respectively. While the deformation of the bottle due to the relative movement between the finger rest recesses 6 is restricted, the rigidity of the back area B is improved, and the rigidity of the finger rest recess 6 and the rear area B gripped by the user is improved. Sufficiently secured and deformation of the entire body portion 4 is suppressed, and the bottle-type container 1 can be gripped stably.

  The reinforcing rib 8 has a vertical cross-sectional shape such that the upper plate 8a extends radially inward from the peripheral wall 4b of the body portion 4 and then folded back at the connecting portion 8c so that the lower plate 8b faces radially outward. The bottle-shaped container 1 is easy to manufacture because it extends and continues to the peripheral wall 4b and has a folded shape as a whole. Specifically, in the production of the bottle-type container 1, when the preform is biaxially stretch blow-molded, the pair of push molds 20 for molding the pair of finger contact recesses 6 move closer to each other, When these pushing molds 20 come into contact with the preform in the middle of stretching, the contact portion is cooled and hardened from other parts, and the amount of stretching in the radial direction thereafter is suppressed, whereby the aforementioned folded shape is formed. The Therefore, for example, the bottle-shaped container 1 provided with the reinforcing rib 8 of this embodiment can be easily manufactured without using a special preform shape as in Patent Document 1 (Japanese Patent No. 3179714) described above.

  Further, in this case, since the thickness of the peripheral wall 4b of the body portion 4 and the thickness of the wall portion of the reinforcing rib 8 (particularly, the outer peripheral edge portions of the upper plate 8a and the lower plate 8b) are unlikely to occur, Occurrence of distortion such as shrinkage due to a difference in thickness with the peripheral wall 4b of the body portion 4 in the vicinity of the rib 8 is suppressed, and the appearance quality of the bottle-type container 1 can be stabilized.

  In addition, since the distance L between the bottom walls 6a of the pair of finger contact recesses 6 is smaller than the outer diameter D of the neck portion 2b of the mouth portion 2, these finger contact recesses in the body portion 4 The shape (outer diameter) of the back surface region B arranged between the six members can be made thin to facilitate gripping. In addition, a large amount of fingers inserted into the finger contact recesses 6 can be ensured, and the user can achieve a deep grip, and the gripping force on the bottle-type container 1 is increased.

  Further, since the bottom wall rib 7 is formed on the bottom wall 6a of the finger resting recess 6, sliding movement between the finger touching the bottom wall 6a and the bottom wall 6a can be suppressed, and the bottle type The holding posture of the container 1 is more stable.

Further, a flat panel surface 3a is formed on the shoulder 3, and the panel surface 3a can be easily directed into the bottle when the inside of the bottle-type container 1 is in a reduced pressure (negative pressure) state. Therefore, it is possible to prevent the portion other than the panel surface 3a from being deformed.
Moreover, the ridgeline part 3b located between the adjacent panel surfaces 3a exhibits the effect | action as a vertical rib, and when these panel surfaces 3a deform | transform, the external appearance of the shoulder part 3 is impaired. It is possible to prevent the depression from being greatly deformed.

  Moreover, according to the manufacturing method of the bottle-type container 1 demonstrated by this embodiment, without using a special preform shape, biaxial stretch blow molding is performed using a general bottomed cylindrical preform. As described above, the reinforcing rib 8 having a remarkable effect can be easily formed.

  Further, in FIG. 4, since the center position between the pressing surfaces 20 a facing each other in the pair of pressing molds 20 is arranged on the bottle back side from the preform axis O, the molding is performed by the pair of pressing molds 20. The reinforcing ribs 8 can be reliably formed not in the front area F of the trunk section 4 but in the rear area B of the trunk section 4 between the pair of finger contact recesses 6. Further, since these finger contact recesses 6 are arranged close to each other on the back side of the bottle, the bottle-type container 1 can be easily grasped even when the palm of the user is small, and the contents are poured out. Cheap.

  Further, in the cross-sectional view shown in FIG. 4, the pressing surfaces 20 a (corresponding to the outer surface of the bottom wall 6 a in FIG. 4) facing each other in the pair of pressing dies 20 that are the forward movement end positions of the approaching movements, Since the outer peripheral surface of the reform (corresponding to the outer peripheral surface of the neck portion 2b in FIG. 4 and the extended portion directed downward thereof) is arranged so as to intersect each other, when the preform is biaxially stretch blow molded The preform can be brought into contact with the indentation mold 20 from the early stage of stretching, whereby the difference between the stretch amount of the portion in contact with the indentation mold 20 and the stretch amount of other parts of the preform. Can be secured greatly. That is, the length of the reinforcing rib 8 in the radial direction determined by the difference in the amount of stretching can be sufficiently secured, and the rigidity of the reinforcing rib 8 is improved and the rigidity of the entire body portion 4 is increased. For this reason, it is possible to reduce the weight of the bottle.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the inner capacity of the bottle-type container 1 is, for example, 2.7 liters or 4 liters, but is not limited thereto, for example, between 2.7 and 4 liters. It may be an internal volume, an internal volume of less than 2.7 liters, or an internal volume of over 4 liters.

  In addition, a plurality of bottom wall ribs 7 are formed on the bottom wall 6 a of the finger rest recess 6, but instead of this, a single bottom wall rib 7 may be used. May not be formed. Moreover, the groove | channel recessed toward radial inside may be formed in the bottom wall 6a instead of the bottom wall rib 7 or with the bottom wall rib 7. FIG.

Further, in the method for manufacturing the bottle-type container 1 described in the above-described embodiment, the pair of pushing molds 20 are moved closer to the forward end position while air blowing the preform. After the pushing mold 20 is moved to the forward end position, air blowing may be performed.
Specifically, the reinforcing ribs 8 may be formed by moving the pair of pushing molds 20 closer to each other and bringing them into contact with the preform before the preform is stretched in the radial direction. However, at an early stage in which the preform is stretched in the radial direction, the pair of pushing molds 20 are moved forward, so that the stretch amount of the preform contact portion in contact with these pushing molds 20 and other parts It is preferable because a large difference from the amount of stretching can be secured, and thereby the strength of the reinforcing rib 8 can be sufficiently secured.

  In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Bottle type container 2 Mouth part 3 Shoulder part 4 Trunk part 4b Perimeter wall 5 Bottom part 6 Recessed part for finger contact 8 Reinforcement rib 20 Pushing die 20a Pushing surface B Back surface area S Side surface area O Bottle axis, preform axis

Claims (5)

A mouth portion, a shoulder portion, a body portion, and a bottom portion are integrally formed along the bottle shaft, and a pair of finger contact recesses are respectively provided in side regions facing each other across the bottle shaft in the radial direction. It is a formed pinch grip type bottle-type container,
A reinforcing rib that protrudes inward in the radial direction from the peripheral wall of the trunk portion and extends along the circumferential direction is formed in a back region located between the pair of the finger rest recesses of the trunk portion, Both ends of the reinforcing rib in the circumferential direction are connected to the pair of concave portions for finger contact, respectively. The bottle-type container according to claim 1,
The shape of the longitudinal section of the reinforcing rib extends from the peripheral wall of the body part toward the radially inner side, and then is folded back and extends toward the radially outer side, and is continuous with the peripheral wall of the body part. Bottle-type container. A mouth portion, a shoulder portion, a body portion, and a bottom portion are integrally formed along the bottle shaft, and a pair of finger contact recesses are respectively provided in side regions facing each other across the bottle shaft in the radial direction. A method of manufacturing a formed pinch grip type bottle-shaped container,
A blow molding process for biaxially stretching blow-molding a bottomed cylindrical preform,
In the blow molding step, before the preform is stretched in the radial direction, the pair of pressing dies for molding the pair of finger contact recesses are moved closer to each other, and among the preforms, By restricting the amount of stretching of the portion in contact with the pressing mold to be less than the amount of stretching of other parts, the peripheral wall of the body is formed in the back surface region located between the pair of finger resting concave portions of the body. A bottle-shaped container characterized in that it protrudes radially inward and extends along the circumferential direction, and both ends in the circumferential direction form reinforcing ribs respectively connected to the pair of finger rest recesses. Production method. It is a manufacturing method of the bottle type container according to claim 3,
A method for manufacturing a bottle-type container, wherein a center position between mutually opposing pressing surfaces in the pair of pressing molds is disposed on the back side of the bottle from the preform shaft. It is a manufacturing method of the bottle type container according to claim 3 or 4,
In a cross-sectional view orthogonal to the preform axis, the pressing surfaces facing each other in the pair of pressing molds that are the forward end positions of the approaching movement and the outer peripheral surface of the preform intersect each other. A method for producing a bottle-type container, characterized by being arranged.

Images