JP6020982B2 - Pinch grip type bottle-type container and movable nesting of its blow molding die device - Google Patents

Description

  The present invention relates to a pinch grip type bottle type container in which a grip part is integrally formed by forming a gripping concave part oppositely on both side wall parts of a body part of a large synthetic resin bottle type container with a grip part, and the container The present invention relates to the structure of a movable nesting of a blow molding die apparatus for molding a mold.

  As a prior art of a large synthetic resin bottle-type container with a grip portion, for example, in Patent Document 1, two gripping recesses 6 that can insert a fingertip are formed on both sides of a body portion 3, and both gripping recesses are formed. An invention relating to a handy bottle 1 in which a grip portion constituted by a rear portion provided between 6 is integrally formed is described.

  In this handy bottle 1, the hand bottle 1 is gripped by holding the thumb in one gripping recess 6 formed in the body 3 and the other finger intruding into the other gripping recess 6. It can be carried around.

  The invention described in Patent Document 1 discloses a technique for forming a holding recess 6 by a movable insert 22 having a smooth mold surface of a blow mold 21 for forming a handy bottle 1. In the blow mold 21, the core 22 is blown by waiting in advance at a position 2.0 to 2.6 times the center diameter of the preform 20 from the center axis of the preform 20. The movable nest 22 is moved to the position of the deepest portion 7 of the gripping recess 6 during the course of the movement, so that the deepest portion 7 of the gripping recess 6 becomes thick, and both sides of the gripping recess 6 are thin. It is intended to improve the trend.

JP 2003-103612 A

However, in the prior art described in Patent Document 1, since the mold surface of the movable nest is smooth, the surface of the gripping concave portion to be molded is smooth, so that the fingertip that has entered the gripping concave portion is There was a problem that it was easy to slip with respect to the surface of the holding recess and the grip state was likely to be unstable.

  In addition, the preform portion that is pushed into the holding recess by the movable insert, particularly the portion that is formed in the deepest portion, is stretched and deformed by contact with the movable insert that is part of the molding die. There is no change in being in a stopped state, and for this reason, the deepest part of the gripping recess is thick, and the degree of improvement of the tendency that both sides of the gripping recess become thin cannot be sufficiently obtained. There was a problem.

  Accordingly, the present invention was devised to solve the above-described problems in the prior art, and the technical problem is to eliminate the slipperiness of the fingertip with respect to the surface of the gripping recess, so that the gripping recess is formed. It is intended to stabilize the grip state by the grip portion.

Also, the technical problem to reduce the stretching deformation about stopping of the preform portion in contact with the movable input this, with the thinning of the deepest part of the holding recess, the thickening of the peripheral wall thereof which is both sides unit The purpose is to obtain.

Among the means of the present invention for solving the above problems, the main configuration of the bottle-type container is:
A pair of left and right gripping recesses are formed in concavity on both side wall portions of the body of the bottle-type container, and a grip portion is formed by the gripping recesses and the rear wall portion between the gripping recesses. It is a pinch grip type bottle-type container that is a resin blow molded product,
The concave surface including at least the entire bottom surface of the bottom wall of the gripping concave portion and the peripheral surface of the peripheral wall continuous to the bottom surface of the bottom wall is a roughened concave surface where a large number of small holes are located,
The deepest portion width which is a counter width of the bottom walls of both the holding recess, greater than 0 mm, and it has less outer diameter of the neck portion, and,
The inclination angles of the peripheral walls on both the front and rear sides of the holding recesses with respect to a virtual horizontal axis center line extending through the central axis of the bottle-type container and extending in the front-rear direction are both substantially perpendicular,
It is in.

The concave surface, including the bottom wall of the holding concave portion, is a portion where the fingertip that has entered the concave portion for contact comes into contact with the bottle-shaped container, but this concave surface is roughened where many small holes are located. Since the surface is a concave surface, the surface thereof is difficult to slip, so that the fingertip that has entered the concave portion for gripping can stably apply a gripping force to the grip portion without slipping. In addition, by making the deepest part width less than or equal to the outer diameter of the neck part, the grip part can be easily gripped, and the amount of penetration of each fingertip into both gripping recesses can be increased. Therefore, a deeper grip can be achieved. Further, at this time, the belly of the fingertip that has entered the holding recess is pressed and contacted with the roughened recess surface of the holding recess without failing to slide reliably. Therefore, it can be set as the pinch grip type bottle container which is easier to hold than ever.
In the bottle-type container of the present invention, when gripping from behind and positioning the thumb in one gripping recess and positioning the other finger in the other gripping recess and gripping the grip, The abdomen comes into contact with the peripheral wall located rearward of the gripping recess, but the recess surface is formed on the roughened recess surface and the inclination angle of the peripheral wall with respect to the horizontal axis center line is set at a substantially right angle. As a result, slipping between the belly of each finger and the peripheral wall is greatly suppressed, and a large latching effect is generated during this time, so that it is possible to provide a grip portion that is difficult to slip and is easy to hold. Therefore, even a user with a relatively small palm can stabilize the dispensing operation of the bottle-type container whose internal capacity exceeds 2 liters. In addition, the peripheral wall formed at a substantially right angle of the gripping concave portion functions as a reinforcing concave rib against the force acting on the trunk portion, causing distortion of the trunk portion and the buckling phenomenon of the gripping concave portion. Suppresses the occurrence.

Roughening recess surface, a bottom surface throughout the bottom wall, by forming the peripheral surface of the continuous wall to the bottom surface of the bottom wall, when by entering the fingertip gripping the grip portion to the holding recess, gripping Whatever the posture of the bottle-shaped container, the fingertip can stably come into pressure contact with the roughened concave surface of the gripping concave portion without slipping .
Another configuration of the bottle-shaped container of the present invention is obtained by adding the main configuration of the bottle-shaped container described above to a semicircular cross-sectional shape of the rear wall portion.
If the rear wall has a semicircular cross section, the palm fits into the semicircular rear wall when the grip is gripped. It is possible to support the bottle-type container stably.

Among the means of the present invention for solving the above-mentioned problems, the main structure of the movable nest provided in the blow mold apparatus for molding the bottle mold container is:
A pair of left and right gripping recesses are formed in concavity on both side wall portions of the body of the bottle-type container, and a grip portion is formed by the gripping recesses and the rear wall portion between the gripping recesses. The deepest part width, which is the opposing width dimension between the bottom walls of both gripping recesses, provided in a blow molding die apparatus for molding a pinch grip type bottle mold container that is a resin blow molded product, is larger than 0 mm, And it is a movable nest for forming a concave part for gripping to be formed below the outer diameter of the neck part,
The nesting mold surface, which is the mold surface of this movable nesting, is a roughened surface on which a large number of small protrusions are located,
The protruding end of each small protrusion on the roughened surface is rounded to a smooth curved surface,
It is in.

Since the nesting mold surface, which is the molding surface of the movable movable nesting, is a roughened surface, when the preform is being stretched and deformed, the movable nesting is advanced and the gripping recess is stretched and molded. The movable insert comes into contact with the preform on the roughened surface. Since this roughened surface is composed of a large number of small protrusions, the preform portion stretched and deformed into the holding recesses is in contact with the protruding ends of the large number of small protrusions, that is, a large number of small protrusions. The protruding end comes into contact in a substantially point contact state. For this reason, the preform portion that is stretched and deformed into the gripping concave portion does not generate a large frictional resistance with the movable nest, and the neck portion has the deepest width that is the width between the bottom walls of the gripping concave portions. It will be stretch-molded into a gripping recess formed below the outer diameter. Also, by making the protruding end of each small protrusion on the roughened surface a smooth curved surface, the contact resistance between the preform and the small protrusion can be reduced regardless of the shape of the small protrusion. Can do.

  The other structure of the movable nest provided in the blow molding die apparatus for molding the bottle mold container of the present invention is the main structure of the above-described movable nest, and the roughened surface is molded by using the embossing process. That is,

  In the case where the roughened surface is formed using a textured process, the roughened surface formed by a large number of small protrusions can be easily formed.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the main configuration of the bottle-type container according to the present invention, the grip portion can be easily gripped, a deeper grip is achieved , and the fingertip that has entered the grip recess with a larger amount of penetration does not slip. Since a gripping force can be stably applied to the grip portion, handling after gripping the grip portion of the bottle-type container can be obtained stably and smoothly.

Roughening recess surface, a bottom surface entire of the bottom wall, by forming the peripheral surface of the continuous wall to the bottom of the bottom wall, when by entering the fingertip gripping the grip portion to the holding recess, gripping Regardless of the orientation of the bottle-shaped container, the fingertip will press and contact the roughened concave surface of the gripping recess without slipping, ensuring stable and smooth handling of the bottle-shaped container. Can be obtained.
The grip portion of the bottle-shaped container is gripped by making the inclination angles of the peripheral walls on both the front and rear sides of both grip recesses substantially perpendicular to the virtual horizontal axis extending in the front-rear direction passing through the central axis of the bottle-shaped container. Then, when the abdomen of each finger comes into contact with the peripheral wall located behind the holding recess, a large latching effect is generated between the abdomen of each finger and the peripheral wall. Therefore, even a user with a relatively small palm can stabilize the pouring operation using a bottle-type container having an internal capacity exceeding 2 liters .
In addition, the peripheral wall formed at a substantially right angle of the gripping concave portion functions as a reinforcing concave rib against the force acting on the trunk portion, causing distortion of the trunk portion and the buckling phenomenon of the gripping concave portion. Occurrence can be suppressed.
If the rear wall has a semicircular cross section, the palm fits into the semicircular rear wall when the grip is gripped. And the bottle-shaped container can be stably supported.

In the main structure of the movable nest according to the present invention, the preform portion stretched and deformed into the holding recess is stretched and formed into the holding recess without causing a large frictional resistance with the movable nest. The gripping recess can be formed by being sufficiently stretched and deformed, so that the entire thickness of the gripping recess is small in the thickness non-uniformity , and the deepest portion which is the opposite width dimension between the bottom walls of both gripping recesses The width can be formed to be equal to or less than the outer diameter of the neck portion .

  In the case where the roughened surface is formed by using the embossing process, the roughened surface formed by a large number of small protrusions can be easily formed, so that the implementation is easy.

The projecting end of the small projections of the roughening treated surface, by which a smooth curved surface by chamfering, regardless of the shape of the small projection, it is possible to reduce the contact resistance of the preform part and the small projections Therefore, the entire area of the holding recess can be stretched and deformed reliably and smoothly.

It is a front view which shows one Example of this invention. It is a side view of the Example shown in FIG. It is a rear view of the Example shown in FIG. FIG. 4 is a plan sectional view taken along line IV-IV in FIG. 2. FIG. 5 is a longitudinal sectional rear view of the main part along the line VV in FIG. 4. It is a partial expanded sectional view of the roughened recessed part surface of the recessed part for holding | grip. It is longitudinal cross-sectional explanatory drawing of the blow molding die apparatus which has a movable nest | insert of this invention. It is an expanded sectional view of the roughening process surface of the movable nest shown in FIG. It is operation | movement explanatory drawing of the roughening process surface of a movable nest | insert.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below along the examples with reference to the drawings.
1 to 6 show an embodiment of a pinch grip type bottle container of the present invention. FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a rear view, and FIG. FIG. 5 is a cross-sectional view taken along line IV-IV, FIG. 5 is a vertical cross-sectional view of the main part taken along line VV in FIG. 4, and FIG.
In the following description, the direction along the front and back of the bottle-type container 1 is the front-rear direction, the direction between both side surfaces is the left-right direction, and the direction between the mouthpiece portion and the bottom portion is the up-down direction. And

  This bottle-shaped container 1 is a biaxially stretched blow molded product made of synthetic resin, has a total height of 337 mm, a maximum diameter of 126 mm, an internal volume of 2.7 liters, and a bottom portion that exhibits a seat function at the lower end A cylindrical shape in which a thread is engraved on the outer peripheral surface through a tapered cylindrical shoulder portion 3 and a neck ring 2a which are reduced in diameter at the upper end of a bottomed cylindrical barrel portion 4 which is continuously provided. The mouth tube portion 2 is continuously provided.

  The shoulder 3 has a truncated cone shape at the top and a polygonal frustum at the bottom. The lower polygonal frustum-shaped portion is provided with eight flat panels 3p having the same shape and size in parallel along the circumferential direction, and a ridgeline 3r of a square wall structure is formed between adjacent panels 3p. Is provided.

  When the inside of the bottle-type container 1 is in a reduced pressure state, the individual panels 3p are deformed by depression and exhibit a reduced pressure absorption function, and the ridgeline 3r is applied by an external force at the time of pressure reduction or due to contact with a fingertip or the like. The function of reinforcing ribs is demonstrated, and the deformation of the entire polygonal frustum-shaped part, that is, the deformation that impairs the appearance is suppressed while allowing the depression deformation of the individual panels 3p during decompression. Demonstrate.

  A recessed portion 11 is formed in a slightly rearward position from the center portion in the front-rear direction of the side wall portion 5 on both sides of the body portion 4 in the left-right direction. The recessed portion 11 is further recessed in a substantially central portion of the recessed portion 11. The formed holding recess 12 is provided.

  At the boundary portion between the shoulder portion 3 and the body portion 4 and at the boundary portion between the body portion 4 and the bottom portion 8, a peripheral rib 7 that functions as a reinforcing rib is formed. And the front wall part 4A of the trunk | drum 4 between the upper periphery rib 7 and the lower periphery rib 7 becomes a smooth surface (refer FIG. 1) without an unevenness | corrugation which can affix a label etc. ing.

  As shown in FIGS. 2 and 5, the holding recess 12 is formed to have a bottom wall 12a that forms a depressed bottom surface that is the deepest part, and a peripheral wall 12d that surrounds the bottom wall 12a. The concave surface of the holding concave portion 12 constituted by the bottom wall 12a and the peripheral wall 12d is formed in a roughened concave surface 12b on which a large number of small hole portions 12c (see FIG. 6) are located.

In FIG. 4, an imaginary line passing through the central axis O of the bottle-type container 1 and extending in the front-rear direction is defined as a horizontal axis center line TCL. At this time, the inclination angle of the front and rear side of the peripheral wall 12d, i.e. the inclination angle α of the peripheral wall 12d of the front and rear sides with respect to the horizontal axis center line TCL, are both set at a substantially right angle. Here, the fact that the inclination angle α is substantially a right angle means that the more preferable inclination angle α is 90 degrees and includes a range of 85 degrees to 95 degrees including manufacturing errors.

  Further, the deepest width Wd, which is the width between the bottom walls 12a of the holding recesses 12, is set to be larger than 0 mm and equal to or less than the outer diameter φ of the neck portion 2b located below the neck ring 2a. Has been. In this embodiment, the outer diameter dimension φ of the neck portion 2b is 35 mm and the deepest width Wd is 16 mm, but these dimensions are not limited to this. The outer diameter dimension φ of the neck portion 2b is an immovable dimension in which the diameter dimension does not change before and after the preform 20 (see FIG. 7) is biaxially stretch blow-molded, and the deepest width Wd is the immobile neck. The outer diameter dimension φ of the portion 2b is set as a reference.

  In the present invention, the region including both the left and right gripping recesses 12 and the rear wall portion 6 formed between the both gripping recesses 12 in a semicircular shape in the rear cross section of the body portion 4 is gripped. Part G.

And as mentioned above, the grip part G can be easily gripped by making the deepest part width Wd equal to or less than the outer diameter dimension φ of the neck part 2b, and each fingertip penetrates into both gripping recesses 12. Since it becomes possible to increase the amount, a deeper grip can be achieved. Further, at this time, the belly of the fingertip that has entered the gripping concave portion 12 presses and contacts the roughened concave surface 12b of the gripping concave portion 12 in a state that it is difficult to slip. Therefore, it can be set as the pinch grip type bottle container which is easier to hold than ever.

  The formation of the both holding recesses 12 as described above is performed simultaneously with the biaxial stretch blow molding of the preform 20. For example, as shown in FIG. 4, the movable nesting 32 is moved with respect to the horizontal axis TCL. It can be formed by adopting a process of moving forward from the left-right direction, which is the vertical direction, in a direction approaching each other and then moving back to the original position.

In the bottle-shaped container 1 of the present invention, when gripping from the rear and positioning the thumb in one gripping recess 12 and positioning the other finger in the other gripping recess 12 and gripping the grip portion G, The abdomen of the finger comes into contact with the peripheral wall 12d located rearward of the gripping recess 12, but the recess surface is formed on the roughened recess surface 12b as described above, and the horizontal axis center line TCL By setting the inclination angle α of the peripheral wall 12d to a substantially right angle, slipping between the belly of each finger and the peripheral wall 12d is greatly suppressed, and a large latching effect is generated between them , so that it is difficult to slip. It can be set as the easy grip part G. Therefore, even a user with a relatively small palm can stabilize the pouring operation using the bottle-type container 1.

  In addition, the peripheral wall 12d formed substantially at right angles to the gripping recess 12 functions as a reinforcing concave rib against the force acting on the body 4, causing distortion deformation of the body 4, and the gripping recess 12. Suppresses the occurrence of buckling phenomenon.

Furthermore, two reinforcing ribs 13 (see FIGS. 2 and 5) are provided in the holding recess 12 so as to cross the arch (see FIG. 4). The reinforcing rib 13 functions to increase the mechanical strength of the gripping recess 12, and the two reinforcing ribs 13 divide the gripping recess 12 into upper and lower three sections approximately equally. However, with this section, the fingertip of one finger can be stably positioned in any of the sections in the holding recess 12.
The number of reinforcing ribs 13 disposed in the holding recess 12 is not limited to the above embodiment (two), but the size of the bottle-type container 1 or the holding recess 12 may be one or three. The number can be set according to the shape and the like.

  The circumferential length of the grip portion G in the circumferential direction is such that the grip portion G is positioned in a state where the thumb is positioned in one gripping recess 12 and the other finger is positioned in the other gripping recess 12. Since it is necessary to be able to grip, it is set to a substantially constant value in accordance with the average palm size.

In this bottle-type container 1, since the palm fits to the semicircular rear wall portion 6 in the state where the grip part G is gripped, the gripping part G can be easily held. It becomes possible to support stably .

  FIG. 7 is a schematic half-cut view of a biaxial stretch blow mold apparatus for forming a pinch grip type bottle mold container of the present invention, just before the stretch molding operation. The blow molding die 30 is formed on the molding die surface portion for molding the recess 11 which is composed of a pair of split molds and a single bottom mold and provided at a substantially central height position of the pair of split molds. A movable nest 32 is disposed in the cavity to be able to enter and exit.

  The movable nest 32 is a mold part for forming the holding recess 12 of the bottle-type container 1, but the surface of the end part on the protruding side for forming the holding recess 12 of the movable nest 32 is rounded. As shown in FIG. 8, the surface of the projecting end portion of the movable nest 32 that is a smooth surface and functions as a mold surface is formed by projecting a large number of small projections 36 having substantially the same projecting height. Thus, the roughened surface 35 is formed. Reference numeral 34 denotes a mold groove for molding the reinforcing rib 13.

  The roughened surface 35 is formed by subjecting the surface of the end portion on the protruding side of the movable nest 32 to a texture process such as blasting, corona discharge machining, or aging.

  The large number of small protrusions 36 constituting the roughened surface 35 have a smooth curved surface in which at least a protruding end portion is rounded off, whereby the movable nest 32 moves forward to form the grip recess 12. When stretch-molding, the frictional resistance generated between the portion to be stretch-molded in the holding recess 12 and each small protrusion 36 is made as small as possible.

  The movable nest 32 is moved forward from the position indicated by the solid line in FIG. 7 to the position indicated by the phantom line at an appropriate time during the stretch blow molding operation of the preform 20 to the bottle-type container 1. Is stretched and deformed into the holding recess 12. Needless to say, at the time when the preform 20 portion facing the movable nest 32 is stretched and deformed into the holding recess 12, the facing preform 20 portion is in a heated softened state.

  During the forward movement of the movable nest 32, the opposing preform 20 portion (for example, the portion formed on the bottom wall 12a) is being stretched and deformed, so that it is stretched with respect to the nested mold surface 33 of the movable nest 32. In this state, contact is made (see the solid line in FIG. 9), and the gripping recess 12 is formed as it is according to the forward movement of the movable nest 32.

In this way, the preform 20 formed in the holding recess 12 contacts the roughened surface 35 of the movable nest 32 in a stretched state, so that contact is made with the protruding end of each small protrusion 36. On the other hand, a point contact state occurs, and therefore, the contact resistance between the preform 20 formed in the holding recess 12 and the nesting die surface 33 of the movable nesting 32 becomes extremely small. Therefore, the preform 20 portion formed in the holding recess 12 is easily stretched and deformed in accordance with the forward movement of the movable nest 32, and the deepest portion width which is the opposing width between the bottom walls 12a of both holding recesses 12 is obtained. Wd is larger than 0 mm and is stretch-molded into the gripping concave portion 12 formed to be equal to or smaller than the outer diameter dimension φ of the neck portion 2b .

  When the gripping recess 12 is stretched and formed by the forward movement of the movable nest 32, the gripping recess 12 portion facing the protruding end surface of the movable nest 32, that is, the bottom wall 12a is stretched and deformed according to the forward movement of the movable nest 32. There is no local thickness. This means that the stretching deformation of the bottom wall 12a suppresses the occurrence of local stretching of the peripheral wall 12d and prevents the peripheral wall 12d from being thinned.

  After the forward movement of the movable nest 32 is stopped, the wall (for example, the bottom wall 12a) of the gripping recess 12 is pressed against the roughened surface 35 by the blow pressure, and the wall surface (for example, the bottom of the gripping recess 12) is pressed by this pressing. The surface of the wall 12a is deformed into the state indicated by the two-dot chain line in FIG. 9, and the protruding end of the small protrusion 36 bites into the wall surface of the gripping recess 12. The wall surface is formed into the roughened concave surface 12b shown in FIG.

As mentioned above, although the structure of this invention and its effect were demonstrated along embodiment example, embodiment of this invention is not limited to the said Example, For example, the roughening recessed surface 12b is movable-nesting. 32 rather than molding, the after blow molding of the bottle-shaped container, it is possible with Turkey be formed by embossing process on the concave surface of the holding recess 12.

  The pinch grip type bottle container of the present invention has a wider grip for forming as a large bottle container by forming a gripping concave portion on both side wall portions of the body portion to pursue ease of holding as a large bottle container. Can be done in the area.

DESCRIPTION OF SYMBOLS 1; Bottle type container 2; Mouth part 2a; Neck ring 2b; Neck part 3; Shoulder part 3p; Panel 3r; Ridge line 4; Trunk part 4A: Front wall part 5; Side wall part 6; 8; bottom portion 11; recess 12; gripping recess 12a; bottom wall 12b; roughened recess surface 12c; small hole portion 12d; peripheral wall 13; reinforcing rib 20; preform 30; blow molding die 31; Movable insert 33; insert mold surface 34; mold groove 35; roughened surface 36; small protrusion G; grip portion TCL; horizontal axis center line Wd; deepest portion width α; Dimension O: Center axis of bottle-type container

Claims (4)

A pair of left and right gripping recesses (12) are formed in concavities on both side wall portions (5) of the body (4) of the bottle-type container (1), and the both gripping recesses (12) and the both In a pinch grip type bottle-shaped container, which is a blow molded product made of a synthetic resin, which forms a grip portion (G) with a rear wall portion (6) between gripping recesses (12), at least the bottom of the gripping recess (12) A roughened concave surface (where a large number of small holes (12c) are positioned) includes a concave surface including the entire bottom surface of the wall (12a) and the peripheral surface of the peripheral wall (12d) continuous with the bottom surface of the bottom wall (12a). 12b), the deepest width (Wd), which is the width between the bottom walls (12a) of the holding recesses (12), is greater than 0 mm and the outer diameter (φ of the neck portion (2b)) ) follows and, as well, as the central axis of the bottle-shaped container (1) to (O), extending in the longitudinal direction Front and rear side of the peripheral wall (12d) inclined angle (alpha) together pinch-grip bottle-shaped container which is characterized in that a substantially right angle in both the holding recess for imaginary horizontal axis centerline (TCL) (12). A pair of left and right gripping recesses (12) are formed in concavities on both side wall portions (5) of the body (4) of the bottle-type container (1), and the both gripping recesses (12) and the both Provided in a blow molding die apparatus for molding a pinch grip type bottle mold container which is a synthetic resin blow molded product that forms a grip portion (G) with the rear wall portion (6) between the holding recesses (12). The deepest part width (Wd), which is the width of the gap between the bottom walls (12a) of the holding recesses (12), is greater than 0 mm and less than or equal to the outer diameter (φ) of the neck part (2b). In the gripping recess (12) for forming the movable nest (32), a large number of small protrusions (36) are positioned on the nest mold surface (33) which is a mold surface of the movable nest (32). and roughening treated surface (35) of each small projections of the roughening treated surface (35) (36) The protruding end portion, the movable insert of the blow molding die apparatus which is characterized in that a smooth curved surface by chamfering. The movable nesting of the blow mold apparatus according to claim 2 , wherein the roughened surface (35) is formed by using a texture process. The pinch grip type bottle-type container according to claim 1, wherein the rear wall portion (6) has a semicircular cross-sectional shape.

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