JP2000016434A - Handle member for hollow container, synthetic resin hollow container having heat-resistant handle, and method for forming them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a large-sized hollow container having a heat-resistant handle capable of performing a high temperature filling in which a separate handle is integrally molded by an insertion molding to a polyester resin container made by blow molding. SOLUTION: A flat plate-like handle plate 1 is connected between both ends where an upper end and a lower end of an assembling beam piece 2 for a container main body B and integrally formed into an annular shape and at the same time an under-cut engaging projection piece 3 and a fitting projection piece are arranged at the assembling beam piece 2. A claw-like piece is arranged at an assembling projection and the assembling beam piece 2 is opened outside to prevent the handle from being pulled out of it. The handle having such a structure as above is insert molded and set while a wall surface of the container at the under-cut portion can be contacted with a surface of the mold when the container main body B is blow molded. PET resin portion of the wall of the container at the under-cut portion is heat set to apply a heat- resistance characteristic to form a large-sized hollow container having a handle in which a high temperature filling can be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle suitable for being attached to a hollow container made of polyester resin which has been biaxially stretch blow-molded, and a container equipped with the handle, particularly a handle formed separately by injection molding. The present invention relates to a heat-resistant large-sized hollow container capable of storing a large volume of contents in a hollow container formed integrally with a container body by insert molding during blow molding.

[0002]

2. Description of the Related Art In recent years, a large amount of hollow containers made of synthetic resin have been used in a large amount of juice and other liquid beverages in accordance with changes in lifestyle. Containers containing these have also become large and heavy, making it inconvenient to carry them, and at the same time feeling inconvenient when pouring and transferring the contents from a container to a small container. .

[0003] In order to make such a large and heavy container easy to hold, a conventional large container containing detergent or oil is blow-molded from a thermoplastic resin such as polyethylene or vinyl chloride. Thus, a large container with a handle in which a handle and a container body are integrally formed at the same time is known.

[0004] However, the above-mentioned containers made of polyethylene, vinyl chloride, etc. are suitable for storing contents that do not require hot filling such as detergents and oils, but require juices and other heat sterilization. It is unsuitable for containers that contain food and drink. Therefore, as a container for storing food and drink requiring heat sterilization, a container blow-molded using a polyethylene terephthalate (PET) resin that can withstand the heat sterilization temperature has been widely and generally used. .

[0005] A container made of PET resin can be molded without adding a plasticizer, so that it is safe as a container for storing food, has excellent gas barrier properties, and has high transparency and transparency. This is because it has mechanical strength and the like. In particular, beverages such as juices need to be sterilized because they are filled under high temperature, so heat resistance is required for containers used for them. Since heat resistance can be imparted by performing heat setting, it has been increasingly used for these containers.

However, when blow-molding such a heat-resistant beverage container using PET resin, it is difficult to integrally mold the handle and the container body as in the case of a polyethylene or vinyl chloride resin container. Since it is very difficult, in the case of large hollow containers made of PET resin up to now, handles that have been formed separately by injection molding etc. are blow-molded into the container body and insert-molded at the same time. A method of assembling it on the wall surface of a container has been adopted.

As a typical large-sized hollow container with a handle made of PET resin which has been conventionally used, the one described in JP-A-2-191156 is widely known. As shown in FIG. 6, the handle plate 31 and a fitting portion 33 protruding laterally from both ends thereof are attached to the tip of a fitting portion of a handle body 31 formed in a substantially U-shape. When the preform formed by injection-molding PET resin is blow-molded into a hollow container, the separately-formed handle 31 is attached to the container body 30. The protrusion 34 of the handle body 31 is attached to the handle mounting recess 35 formed in the handle mounting recess 35 formed on the upper side wall surface of the body by the insert molding.
5 is engaged with the innermost part of the upper and lower surfaces of the handle, and the hollow container with a handle is provided with the handle body 31 attached so that the outer surface of the grip plate 32 is flush with the outer surface of the container body. is there.

However, the handle 31 having such a structure is used.
The container equipped with is simple in design and structurally simple, so it is easy to mold it.However, on the other hand, the container may be damaged due to collapse during transportation or inadvertent drop during use. When the colliding with the floor from the handle direction side, the impact force concentrates on the surface of the projection 34 of the fitting portion 33, so that there is a problem that the container is easily broken.

In order to solve such a drawback, Japanese Patent Laid-Open Publication No. Hei 7-223254 discloses a method for improving the above drawbacks. As shown in FIG. The upper and lower assembling plates 43a and 43b for assembling the handle body 41 into the recessed holes 48a and 48b formed on the upper and lower surfaces of the handle mounting recess 47 are formed in a plate-like handle portion 4.
2 and the upper and lower assembly plates 43a, 43b.
A plate-like assembled beam plate 45 is connected between both front ends to form a substantially O-shaped annular handle body 41, and the front end of the upper assembled plate 43a has an upward projection. The handle body 41, which is formed by projecting a piece 44a and projecting a downward projecting piece 44b from the front end of the lower assembly plate 43b, is separately formed by injection molding, and the handle body 41 is blown. The preform made of PET resin is blow-molded into a hollow container while being held in a molding die, and at the same time, a mounting recess 4 formed on the upper side wall surface of the body of the container body 40.
7, the handle 41 is insert-molded and fixed.

The container provided with the handle body 41 having such a structure is composed of a beam plate 45 of the handle body and upper and lower assembled plates 4.
3a and 43b are insert-molded so as to fit into the central vertical groove 49 of the bottom wall of the handle mounting concave portion 47 of the container body and the upper and lower concave portions 48a and 48b, respectively. Therefore, the handle body 40 is assembled so that it does not rattle and does not come off, and since the assembling beam plate 44 is connected to the upper and lower assembling plates 42 and 43, the upper and lower assembling members are attached. Even when a strong external force is applied to the plate, the distance does not change, so that even when the plate falls from the handle portion 42 side to the floor, the impact force does not concentrate and act to break the container. .

However, most of the large containers made of PET resin, which are molded using the handle having the above-described structure, and are currently on the market, are filled with soy sauce or shochu at room temperature. Some of them are filled with sake, mirin, etc., but the filling temperature is at most about 70 ° C., which is higher than this.
Heat-resistant containers filled at a high temperature of about 5 ° C
It did not exist to date.

One possible reason for this is that when the handle is fixed in a mold and integrated by insert molding, PET resin is entangled with the joint between the handle and the container body having a complicated shape. Since the undercut part to be formed does not contact the inner surface of the blow molding mold at all, the undercut part cannot be heat-set well, and the heat resistance of the part decreases, so such a container is used. This is because, if the filling is performed at a high temperature, there is a risk that the handle body may come off due to heat shrinkage.

Further, in any of the above containers,
An undercut for fitting the upper and lower portions of the handle body to the container is provided.In particular, since the undercut portion of the lower portion of the handle body is provided near the container body having the maximum diameter, When blow molding is performed so that the PET resin is entangled with the undercut portion, not only does the thickness of the container in this portion become thinner and the rigidity becomes weaker, but also the draw ratio partially increases, so It is expected that the container will be thermally deformed during hot filling. Further, when any of the handles used in the above-described container are molded by injection molding,
Unless the mold for molding is divided into three parts,
Since the handle has a shape that cannot be taken out, the structure of the molding die is complicated, and the number of pieces is small, so that the manufacturing cost of the handle cannot be reduced.

Therefore, as a result of studying to eliminate the above-mentioned disadvantages, a handle having a structure as described in Japanese Patent Application Laid-Open No. 7-32455 was invented, and a large-sized container having the handle attached to the container was developed. The applicant has already proposed. As shown in FIG. 8, the handle body has a flat handle plate 52 laid between upper and lower ends of a pair of straight bar-shaped assembled beam pieces 53 having upper and lower ends curved in a rearward direction. A handle having an annular structure is integrally formed by injection molding, and an engaging projection 54 is linearly protruded from an opposing surface of the assembled beam 53 to form the assembled beam. A fitting projection 55 protrudes from the center of the distal end surface, and a rectangular piece-like assembled projection 56 is formed on the distal end surface of the curved portion at the upper and lower ends of the assembled beam piece. On the back surfaces of the handle plate 52 and the assembled beam piece 53, a large number of concave portions are formed for appropriate lightening.

By using the thus-formed handle as an insert material to blow-mold a hollow container, as shown in FIG. A concave portion 57 is formed, and a slightly wide and flat protruding ridge portion 58 protrudes vertically in the center of the bottom surface excluding the upper and lower ends of the concave portion along the assembling beam pieces 53. Vertical bulging pieces are formed on both side end surfaces of the portion, and engagement grooves are formed with the bottom surface of the concave portion. A blind hole-shaped fitting hole 59a is formed at the center of the bottom surface of the concave portion in contact with the assembled beam piece 53, and an assembled concave portion 59b is formed above and below the fitting hole, respectively. The engagement groove including the bulging piece of the ridge portion 58, the fitting hole and the recess with the assembling, the engaging protrusion 54 and the fitting protrusion 55 of the assembling beam 53 and the assembling protrusion. The portions 56a and 56b are fitted and fixed, and the handle body 51 is attached to the container body 50 to form a hollow container with a handle.

In the handle of the container having the above structure, the undercut portion for assembling the handle to the container body is separated from the portion where the container has the maximum diameter and the wall thickness is reduced by blow molding. Since they are fitted inside, there is no danger that the wall of the container becomes weak unlike the container described in the conventional Japanese Patent Application Laid-Open No. 7-223254. However, in a container with a handle as described above, a handle made of synthetic resin cannot be heated to a high temperature unlike a molding die made of metal. Since the PET resin in the wrapped portion is not heat-set, the heat resistance of this portion is lower than that of the other portion, and heat shrinkage may occur at the time of high-temperature filling, and the handle may be detached.

Further, the handle 5 having the above-described structure is provided.
1 is firmly attached to the container body 50, but as shown in FIG. 10, when a strong force for pulling the handle plate 52 away from the container is applied in the X direction, the fitting fixing portion Since the rigidity of the undercut portion is weak, the assembled beam piece 53 is deformed so as to spread in the Y direction (that is, the handle is radially outward of the container) in which the assembled beam piece 53 tends to come off from the undercut portion. The body 51 is the container body 5
Departure from zero cannot be completely prevented.

[0018]

SUMMARY OF THE INVENTION According to the present invention, in order to prevent the handle from being detached from the container body, even if a strong external force is applied to the handle in the direction of pulling out, the mounting portion of the handle is opened outward. In addition to providing an undercut portion with a structure that does not come off from the container wall surface, heat resistance is given by heat setting the PET resin in the undercut portion where the container body and the handle body are fitted and fixed by blow molding. Another object of the present invention is to form a heat-resistant hollow container with a handle.

The heat-resistant hollow container made of PET resin is sterilized by heating it in a high-temperature bath or shower in order to seal it immediately after the contents are filled at a high temperature and then sterilize it. In a PET resin container having a low rigidity having a normal structure, the content shrinks when cooled, and the container becomes in a decompressed state. In order to prevent the deformation, it is necessary to provide an absorbing wall (a reduced-pressure absorbing panel portion) for absorbing reduced pressure on the body wall portion of the container body.

Since the length of the reduced pressure absorption panel provided on the body wall of the container needs to be at least half the height of the container, a handle must be provided in a narrow portion between the mouth and neck and the absorption panel. However, since the height of the container is limited by the height of the display shelf due to the product display, the size of the panel is greatly affected by the size and shape of the container, the design, and the wall surface of the container. The size and shape of the decompression absorption panel must be changed depending on the position of the label to be attached to the panel.
In a container having a size and shape limited by such various conditions, the area of the decompression absorption panel portion is minimized, and the container wall is small and easy to hold due to heat-filling, which does not cause decompression deformation of the container wall. Provide a heat-resistant container provided with.

[0021]

SUMMARY OF THE INVENTION In order to solve the above-mentioned technical problems, the invention of the present application provides a structure in which, when a strong force is applied to the handle body in a direction of pulling out of the container, the handle plate is removed. In order to prevent the assembled beam piece from being deformed so as to come off and spread, a claw-shaped piece is provided on the engaging projection, the fitting projection, and the assembly projection of the undercut for attaching the handle to the container wall. Even if a force in the release direction is applied to the handle body, the claw-shaped piece is fitted to the container wall surface, and the handle body is structured so that the assembled beam piece opens outward and prevents the handle body from coming off. When the handle is formed by insert molding, the container wall of the undercut portion is set so as to be in contact with the mold surface, and is blow-molded and heat-set with respect to the resin of the undercut portion. Is performed to provide heat resistance.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION A preform P obtained by molding a PET resin into a predetermined shape by injection molding is heated to a temperature at which blow molding can be performed, and then, as shown in FIG.
The molding die is closed while holding the handle H at a predetermined position so that insert molding can be performed, while holding the handle H in the blow molding position in 1a and 11b, and sandwiching the preform and the grip from both sides. Once the preform P and the handle H are held in the mold so that insert molding is possible,
Pressurized air is blown into the preform through a blow pin provided concentrically with the holder of the preform P to blow-mold the hollow container, and is provided on the assembled beam piece 2 of the handle body H as an insert material. The handle is firmly attached to the body wall portion of the container body B so as to wrap the undercut portions of the engagement protrusion 3, the fitting protrusion 4, and the assembly protrusion 5, and the container of the undercut portion is provided. By heat setting the wall to impart heat resistance, a heat-resistant hollow container with a handle as shown in FIG. 1 is formed.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 4, a handle H of the present invention to be mounted on a handle mounting recess 7 formed on an upper side wall surface of a container body B has a pair of straight bar-like assembled beams arranged in parallel. The upper end and the lower end of the piece 2 are bent backward, and the flat handle plate 1 is connected between the both ends to be integrally formed in a ring shape.

An engaging projection 3 is linearly projected on the opposite surface of the assembled beam 2 and a recess is provided at the center of the front end face of the assembled beam 2. Mating projection 4
In addition, an undercut portion is formed on each of the front end surfaces of the curved portions at both lower ends of the assembled beam piece, and an undercut portion is formed by projecting an assembled projection 5 formed in a square piece shape. Protruding piece 3
The handle H, which is formed so as to be able to be assembled to the container body, is formed by forming the claw-shaped piece 3a with the fitting projection 4 and the tip of the assembled projection 5 facing the mouth and neck of the container. Molded by injection molding of synthetic resin.

The reason why the tip of the claw-shaped piece 3a of the undercut portion is oriented toward the mouth and neck of the container is that the preform is easily deformed into the shape of the container during blow molding. This is because, when the shape is oriented in the opposite direction, the shapeability deteriorates. The direction of the claw-shaped piece may be in the direction of the central axis of the preform or in a direction in which the direction is shifted by 90 degrees from the direction of the preform. Cannot be divided into two, and the number of molded products is reduced, resulting in an increase in cost.

Next, the preform P made of PET resin, which has been molded into a predetermined shape by injection molding, is heated to a temperature at which blow molding can be performed.
b, the handle H, which has been formed separately, is gripped by hand or a robot arm and supplied to the blow molds 11a, 11b to perform insert molding. After being held as possible, the blow mold is closed as shown in FIG. Subsequently, after moving the blow molding dies 11a and 11b to the blow molding position, they are stretched in the vertical direction by a stretching rod provided on the preform support, and at the same time, pressurized air is blown through a blow pin to perform biaxial stretching blow. By performing a molding operation, the hollow container B is molded as shown in FIG.

When the hollow container is biaxially stretched and blow-molded as described above, a handle mounting concave portion 7 is formed on the upper side wall surface of the container body, and the grip at the central portion excluding the upper and lower ends of the concave portion is formed. A wide ridge 8 is formed in the vertical direction at a portion between the pair of assembled beam pieces 2 of the body H, and a vertical bulging piece 8a is formed on a side surface of the ridge. Thus, an engagement groove in which the engagement protrusion 3 is engaged is formed between the bulging piece and the bottom surface of the concave portion. A fitting hole in which the fitting protrusion 4 is fitted and a fitting protrusion 5
Are formed in a blind hole shape, and the PET resin is deformed so as to be entangled with these undercut portions, and the claw-like pieces bite into the wall surface so that a grip is formed on the wall surface of the hollow container. The body is fixed.

The handle body of the present invention can have a symmetrical structure, and the molding die to be blow-molded can be a symmetrical half mold having a symmetrical structure. In the case where the handle is insert-molded and blow-molded, the PET resin in the undercut portion, which is blow-molded and fitted to the handle to be inserted, comes into contact with the surface of the molding die. The undercut portion of the wide ridge is heat-set to give heat resistance to the assembled portion, and the handle H is firmly assembled to the container body B. A container is formed.

As shown in FIGS. 1 and 2, the large container with a handle of the present invention formed as described above has an undercut portion in which the handle H is fitted to the body wall surface of the container B and assembled. Since the lower end portion C of the handle is fitted inside the body wall surface of the largest diameter portion of the container as compared with the conventional one, that is, located near the center of the container, the container meat of this portion is fitted. Since the thickness does not become thin unlike a conventional product, there is no possibility that the rigidity of the portion is weakened unlike the conventional container.

Further, the handle H of the present invention has a symmetrical structure as shown in FIG. 4, so that the injection molding die can be made into a simple structure divided into two parts. In the case of molding by injection molding, it is possible to take a large number of products and perform molding, so that the production cost of the molding die can be increased and the production cost of the handle body is kept low. be able to.

[0031]

According to the hollow container with a handle of the present invention, as described above, the assembly portion of the handle body is heat-set at the time of blow molding to provide heat resistance, and the claw-shaped piece provided in the undercut portion is provided. Since the tip is cut into the wall of the container, even if the contents are heated and filled, the strength of the container will not be reduced or the handle will not easily come off due to deformation. Even if there is, it can be handled safely. Also, the handle body of the present invention assembled into the hollow container by insert molding at the same time as blow molding, because the undercut portion is fitted to the portion located inside the body wall surface of the maximum diameter portion of the container. Since the thickness of the container at that portion is large, the rigidity of the container does not decrease and the container can be firmly assembled. Furthermore, since the handle of the present invention has the same shape in which the upper and lower sides and the left and right sides are symmetrical and can be formed by forming the forming die into two parts, the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a hollow container with a heat-resistant handle mounted with a handle of the present invention.

FIG. 2 is a cross-sectional view of the hollow container of the present invention shown in FIG.

FIG. 3 is a longitudinal sectional view showing a process of insert-molding the handle of the present invention.

FIG. 4 (a) is a side view showing the handle of the present invention.

FIG. 4 (b) is a front view of the handle shown in FIG. 4 (a).

FIG. 5 is a side view showing a conventional container with a handle.

FIG. 6 is a perspective view showing a handle used in FIG. 5;

FIG. 7 is a side view showing another conventional container with a handle.

FIG. 8 (a) is a side view showing the handle used in FIG.

FIG. 8 (b) is a rear view of the handle shown in FIG. 8 (a).

FIG. 9 is a side view showing a container according to the prior art of the present invention.

FIG. 10 is a plan view of the container shown in FIG.

11 (a) is a side view showing the handle used in FIG. 9. FIG.

FIG. 11 (b) is a front view of the handle shown in FIG. 11 (a).

[Explanation of symbols]

 B. Container body C. H. Lower part of handle Handle body Parison Handle plate 2. Assembled beam pieces 3. Engagement projection 3a. Nail-shaped pieces 4. Mating projection 5. Assembling protrusion 7. Mounting recess 8. Ridge 8a. Bulge 11. Mold

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[Procedure amendment]

[Submission date] December 31, 1998 (1998.12.
31)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

However, the handle 31 having such a structure is used.
As shown in Fig. 5 , the container equipped with is simple in design and simple in structure, so that it is easy to mold it. When the container collides with the floor surface from the handle direction side due to a fall or the like, the impact force concentrates on the surface of the projection 34 of the fitting portion 33, so that the container is easily broken.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

In order to solve such a disadvantage, Japanese Patent Laid-Open Publication No. Hei 7-223254 discloses a technique which is formed on the upper side wall of the body of the container body 40 as shown in FIG. The upper and lower assembling plates 43a and 43b for assembling the handle body 41 into the recessed holes 48a and 48b formed on the upper and lower surfaces of the handle mounting recess 47 are formed in a plate-like handle portion 4.
2 and the upper and lower assembly plates 43a, 43b.
A plate-like assembled beam plate 45 is connected between both front ends to form a substantially O-shaped annular handle body 41, and the front end of the upper assembled plate 43a has an upward projection. The handle body 41, which is formed by projecting a piece 44a and projecting a downward projecting piece 44b from the front end of the lower assembly plate 43b, is separately formed by injection molding, and the handle body 41 is blown. The preform made of PET resin is blow-molded into a hollow container while being held in a molding die, and at the same time, a mounting recess 4 formed on the upper side wall surface of the body of the container body 40.
7, the handle 41 is insert-molded and fixed.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

As shown in FIG. 7, the container having the handle 41 having such a structure is provided with a beam plate 45 and a pair of upper and lower assembled plates 43a and 43b. 47, the central vertical groove 49 in the bottom wall and the upper and lower concave holes 4
8a and 48b are insert-molded so as to be fitted respectively. Therefore, the handle body 40 is assembled so that it does not rattle and does not come off, and since the assembling beam plate 44 is connected to the upper and lower assembling plates 42 and 43, the upper and lower assembling members are attached. Even when a strong external force is applied to the plate, the distance does not change, so that even when the plate falls from the handle portion 42 side to the floor, the impact force does not concentrate and act to break the container. .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

Therefore, as a result of studying to eliminate the above-mentioned disadvantages, a handle having a structure as described in Japanese Patent Application Laid-Open No. 7-32455 was invented, and a large-sized container having the handle attached to the container was developed. The applicant has already proposed. As shown in FIG. 11 , the handle body is formed by arranging a flat handle plate 52 between upper and lower ends of a pair of straight bar-shaped assembled beam pieces 53 having upper and lower ends curved parallel to each other. A handle having an annular structure is integrally formed by injection molding, and an engaging projection 54 is linearly protruded from an opposing surface of the assembled beam 53 to form the assembled beam. A fitting projection 55 protrudes from the center of the distal end surface, and a rectangular piece-like assembled projection 56 is formed on the distal end surface of the curved portion at the upper and lower ends of the assembled beam piece. On the back surfaces of the handle plate 52 and the assembled beam piece 53, a large number of concave portions are formed for appropriate lightening.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

By blowing the hollow container using the thus-formed handle as an insert material, as shown in FIG. 9 , the handle is attached to the body side wall of the upper half of the container body 50. A concave portion 57 is formed, and a slightly wide and flat protruding ridge portion 58 protrudes vertically in the center of the bottom surface excluding the upper and lower ends of the concave portion along the assembling beam pieces 53. Vertical bulging pieces are formed on both side end surfaces of the portion, and engagement grooves are formed with the bottom surface of the concave portion. A blind hole-shaped fitting hole 59a is formed at the center of the bottom surface of the concave portion in contact with the assembled beam piece 53, and an assembled concave portion 59b is formed above and below the fitting hole, respectively. The engagement groove including the bulging piece of the ridge portion 58, the fitting hole and the recess with the assembling, the engaging protrusion 54 and the fitting protrusion 55 of the assembling beam 53 and the assembling protrusion. The portions 56a and 56b are fitted and fixed, and the handle body 51 is attached to the container body 50 to form a hollow container with a handle.

[Procedure amendment 6]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

[Fig. 1]

FIG. 2

FIG. 4 (a)

FIG. 4 (b)

[Fig. 3]

[Fig. 5]

[Fig. 6]

[Fig. 7]

FIG. 8 (a)

FIG. 8 (b)

[Fig. 9]

FIG. 10

FIG. 11 (a)

FIG. 11 (b)

Continued on the front page F-term (reference) 3E062 AA09 AB01 AC02 HA03 HB02 HB07 HC10 4F202 AA24 AD05 AD24 AG29 AH55 CA15 CB01 CB12 CK25 CQ01 CQ05 4F208 AA24 AD05 AD24 AG29 AH55 LA02 LA04 LA09 LB01 LB11 L21 LJL11 LJL11 LJL11

Claims (8)

[Claims] An upper end and a lower end of a pair of straight assembling beam pieces arranged in parallel to be attached to an upper side wall surface of a container body are bent backward, and a flat handle plate is provided between the both end portions. A handle body that is connected and integrated in an annular shape, and an engaging projection is protruded on the opposing surfaces of the pair of assembled beam pieces, and a front end face of the assembled beam piece is A projecting fitting piece is protruded at the central portion, and an undercut portion is formed at the starting point of the curve with a protruding projection to form a handle body that can be assembled to the container body. A handle for a hollow thermoplastic synthetic resin container, wherein a hook-like piece is formed at the tip of an engaging projection, a fitting projection, and a projection with a beam. 2. The thermoplastic synthetic resin according to claim 1, wherein the fitting projection protruding from the center of the front end face of the pair of assembled beams has a hollow at the center. Handle of hollow container. 3. The assembled projection that projects from a curved starting point on the front end surface of the pair of assembled beams is formed in a rectangular shape at the lower end of the assembled beam. A handle body of the thermoplastic synthetic resin hollow container according to claim 1. 4. The handle of a thermoplastic synthetic resin hollow container according to claim 1, wherein the claw-like piece is formed so that the tip thereof is directed toward the mouth and neck of the container. . 5. A handle body, wherein upper and lower ends of a pair of straight assembling beam pieces arranged in parallel are bent backward and connected to a flat-shaped handle plate to form an annularly integrated handle body. A linear engaging projection is protruded from the opposing surface of the beam,
At the center of the front end face of the assembled beam piece, a fitting protruding part whose center is depressed forms an undercut part where a square piece-shaped assembling projection is protruded at a curved starting point part, and the engagement is performed. Assembling a handle having a claw-shaped piece formed at the tip of a protruding piece, a fitting protruding piece, and an assembled protruding portion into a handle mounting recess formed on an upper body wall surface of a biaxially stretch blow molded hollow container. A hollow container having a wide width in the vertical direction is formed in a central portion of the hollow portion excluding the upper and lower ends of the handle mounting recess, the portion being sandwiched between the assembled beam pieces. A vertically long engaging groove is formed on a side surface of the assembling beam, and an engaging protrusion of the assembled beam is engaged with the engaging groove. Is formed with a fitting hole in which the fitting protrusion is fitted in a blind hole and a fitting recess in which the fitting projection engages. The container wall surface is entangled with the formed undercut portion, and the claw-shaped piece is cut into the wall surface. Characterized thermoplastic synthetic resin hollow container with heat-resistant handle. 6. The handle body is assembled so that an undercut portion of an assembling protrusion provided on an assembling beam piece is located near a center of the hollow container. The thermoplastic synthetic resin hollow container with a heat-resistant handle described in 1. 7. A preform molded by injection molding a PET resin into a predetermined shape and heated to a temperature at which blow molding can be performed, is supported at a predetermined position of a blow molding mold so as to be blow moldable, and The upper and lower ends of a pair of linearly assembled beam pieces arranged in parallel are bent backward and connected to a flat handle plate to be integrated into a ring, and the opposite faces of the assembled beam pieces are engaged. A mating piece is protruded, and a fitting protruding piece is provided at a central portion on a front end face of the assembled beam piece, and an undercut portion formed by protruding a protruding portion at a curved start point portion at a lower end portion. The grip body formed with the claw-shaped pieces is supplied to the blow molding die so that the undercut portion is positioned on both sides closer to the center than the outer diameter surface of the front surface of the preform so as to be insertable and blown. At the same time the mold is closed, a biaxial stretch blow molding operation is performed. Forming a handle mounting recess on the upper body wall of the hollow container to be molded, and forming a wide ridge at a portion sandwiched between the assembled beam pieces in the mounting recess; A fitting hole formed in the bottom surface of the mounting recess where the front face of the assembled beam piece is in contact with the engagement projection of the assembled beam piece in a vertically long engagement groove formed on the side surface of the mounting recess. And the assembling concave portion, the fitting protrusion and the assembling protrusion provided on the assembling beam piece are engaged so that the claw-shaped pieces bite, and the handle is fixed and the undercut portion is heat-set, A method of molding a thermoplastic synthetic resin hollow container with a heat-resistant handle, wherein the handle is firmly attached to the container body. 8. The grip body is held in a state where the undercut portion of the container can be brought into contact with the inner surface of the blow molding die, and at the same time as the blow molding, the undercut portion is brought into contact with the heated die surface. The method for molding a thermoplastic synthetic resin hollow container with a heat-resistant handle according to claim 7, wherein the container is heat-set after contact.