JP2022074805A - Mold - Google Patents

Abstract

To provide a mold for molding a container having a high capability of sealing the contents without causing steep rise of a production cost.SOLUTION: A mold 1 is a mold for molding a bottomed container having a bottom face and a side face, is provided with a projection forming part 8 forming a lid engaging projection 9 projecting outwardly and capable of engaging with a lid, on the side face of the container, wherein the projection forming part 8 includes a molding component 11 for forming the lid engaging projection 9 by retreating and projecting in the horizontal direction, an elevating component 5 capable of elevating in the vertical direction, and a conversion mechanism 10 for converting an elevating movement of the elevating component 5 along the vertical direction to the retreat and projection movement of moving the molding component 11 horizontally toward the projection direction of the lid engaging projection 9.SELECTED DRAWING: Figure 2

Description

The present invention relates to a mold for molding a container containing food or the like with good airtightness, and more specifically, a gold having a protrusion forming portion for forming a lid engaging protrusion that engages a lid with the container. It's about molds.

In the Korona-ka that occurred in 2020, it was recommended to refrain from going out, and eating out was avoided, and the delivery service industry represented by "Uber Eats (registered trademark)" became prosperous. In such a delivery service, a service provider goes to a restaurant, picks up the ordered item ordered by the orderer from the restaurant, and delivers the ordered item to the orderer waiting at home or the like. There is. Here, in the general delivery service industry, bicycles and motorcycles are often used to transport ordered items from restaurants to designated places.

However, bicycles and motorcycles are vehicles that vibrate and shake greatly during driving, and are not very suitable transportation means for transporting food. This is because some of the foods ordered include foods such as juicy noodles, and the sealing properties of ordinary take-out containers cannot withstand the above-mentioned vibrations and shaking, so when they arrive at the designated place. In some cases, the contents of the food leaked out. That is, in restaurants affiliated with the delivery service industry, there has been a demand for a container having excellent airtightness so that the contents do not leak even if a large vibration or shaking is applied during transportation.

As the container with improved airtightness, containers such as Patent Document 1 to Patent Document 3 are known.
That is, Patent Document 1 includes a container body and a lid portion having a square shape and a flange portion projecting from the opening edge portion, and is inside the corner portion of the opening edge portion where the container body and the lid portion are fitted. Disclosed is an egg container characterized by providing a fitting portion having an uneven outer surface and a detachable locking holding portion by a fitting receiving portion. The fitting portion of the egg container of Patent Document 1 is formed in a shape that gently protrudes toward the inside of the container, and the fitting receiving portion has a shape that is gently recessed in accordance with the fitting portion. By lightly fitting the fitting portion to the fitting receiving portion, the lid portion can be fitted to the container body.

Further, Patent Document 2 describes a container composed of a container body made of synthetic resin foam and a lid, and when a storage container made of synthetic resin foam is provided on the back surface of the lid, the back surface of the lid is provided. A container is disclosed in which a recess and / or a protrusion is provided, and a protrusion and / or a recess is also provided at the upper end of the synthetic resin foam storage container, and both are combined and locked. The protrusions of the container of Patent Document 2 are formed in a spherical shape, and the concave portions are formed in a spherically concave shape. It is possible to pull out the protrusion from the.

Further, Patent Document 3 describes a container molding apparatus having a mold composed of a hard member and a soft member, in which the applied portion of the hard member is in the pressing direction with respect to the receiving portion of the soft member. The deformed portion of the soft member is configured to be deformed in a deformation direction different from the pressing direction, and the soft member is placed on the opposite side of the applied portion with the receiving portion of the soft member interposed therebetween. Disclosed is a molding apparatus configured to provide a constraining abutting portion and to provide a slope on at least one of the applying portion or the receiving portion to define the deformation direction of the deformed portion. In the container molding apparatus of Patent Document 3, if the outer hard member is pulled out after molding, the deformable soft member can also be removed, and the mold can be pulled out by using two members having different hard and soft parts. It has become like.

Japanese Patent Application Laid-Open No. 2003-128106 Japanese Unexamined Patent Publication No. 2006-07642 Japanese Unexamined Patent Publication No. 2019-198982

By the way, in order to improve the airtightness of the conventional take-out container used in restaurants so that the contents do not leak even if vibration or shaking is applied, it is necessary to increase the sealing strength to engage the lid with the container. There is. That is, when forming the lid engaging protrusions that engage the lid on the side surface of the container with which the lid contacts, it is conceivable to increase the number of the lid engaging protrusions to increase the engaging strength.
However, if a lid engaging protrusion that is continuously connected along the opening edge is formed, or if a plurality of lid engaging protrusions are provided side by side along the opening edge, the engagement strength of the lid is increased more than before. It is necessary to improve the airtightness of the container by the lid.

In this respect, the container of Patent Document 1 described above is provided with a gently protruding fitting portion and a gently recessed fitting receiving portion, and the fitting portion itself can exhibit originally high engagement strength. Not a structure. Therefore, it is unlikely that the airtightness of the container by the lid will be greatly improved even if the number of fitting portions and fitting receiving portions is increased.
It is possible to increase the unevenness of the fitting portion and the fitting receiving portion to improve the airtightness, but if the unevenness is too large, mold release cannot be performed after molding, and the molding defect rate becomes high. It leads to soaring manufacturing costs.

On the other hand, the container of Patent Document 2 has a structure capable of exhibiting high engagement strength as in Patent Document 1, because the contents may come off through the defective portion for pulling out the protrusion from the recess. not. It is also possible to remove the defective part that causes leakage, but this makes it difficult to release the mold and disengage after molding, which makes it difficult to use and increases the molding defect rate, resulting in a high manufacturing cost. It becomes easier to do.

On the other hand, the container of Patent Document 3 uses a soft member having different hardness and a hard member, and a combination of a plurality of members having different materials and the like causes a complicated processing process and an increase in manufacturing cost. It has the drawback of being easy.
The present invention has been made in view of the above-mentioned problems, and a protrusion for engaging the lid can be continuously formed along the opening edge on the side surface of the container with which the lid comes into contact. It is an object of the present invention to provide a mold capable of forming a container capable of obtaining a high degree of airtightness to the contents without causing an increase in cost.

In order to solve the above problems, the mold of the present invention takes the following technical means.
That is, the mold of the present invention is a mold for molding a bottomed container having a bottom surface and side surfaces.
The side surface of the container is provided with a protrusion forming portion that projects outward and forms a lid engaging protrusion that can be engaged with the lid, and the protrusion forming portion moves in and out in the horizontal direction. The forming member forming the lid engaging protrusion, the elevating member that can be raised and lowered in the vertical direction, and the elevating operation along the vertical direction of the elevating member are directed toward the protruding direction of the lid engaging protrusion. It is characterized by having a conversion mechanism for converting into an exit / exit motion of moving horizontally.

It should be noted that preferably, the conversion mechanism includes a connecting shaft that connects the elevating member and the molding member, and an insertion hole that is perforated in the molding member and allows the tip of the connecting shaft to be freely inserted in the vertical direction. The elevating member is perforated, and the connecting shaft is provided with a fixing hole for fixing the base end of the connecting shaft in a state where movement is restricted in the vertical direction, and the connecting shaft, the insertion hole, and the fixing hole are provided. By arranging them concentrically with respect to the axis inclined in the protruding direction of the lid engaging protrusion, the molded member moves in the protruding direction of the lid engaging protrusion in accordance with the raising and lowering of the elevating member. It should be possible.

It is preferable that a cylinder for moving the elevating member in the vertical direction is provided below or above the elevating member.

According to the mold of the present invention, protrusions for engaging the lid can be continuously formed along the opening edge on the side surface of the container with which the lid comes into contact, without causing an increase in manufacturing cost. It is possible to mold a container that can obtain a high degree of airtightness to the contents.

It is a perspective view which showed the mold of this embodiment by comparison in the molding state and the mold release state. FIG. 3 is a perspective view showing a cross section of FIG. 1 when cut on the X-plane in comparison with a molded state and a mold release state. It is an enlarged view which showed the conversion mechanism by comparison in the molding state and the mold release state.

Hereinafter, embodiments of the mold 1 of the present invention will be described in detail with reference to the drawings.
FIG. 1 schematically shows the mold 1 of the present embodiment.
As shown in FIG. 1, the mold 1 of the present embodiment is made of a metal such as SK steel and is formed in a rectangular parallelepiped shape. Specifically, the mold 1 of the present embodiment is formed in a square shape in which the dimensions in the left-right direction and the front-rear direction are substantially the same, and the dimensions in the vertical direction are slightly short.

A container molding die 2 (die plate) recessed downward is provided on the upper side of the die 1. The container molding mold 2 is formed in a bottomed box shape having a square bottom surface 2a and side surfaces 2b rising in an inclined manner from the four sides of the bottom surface 2a toward the outside and upper side of the container. Further, the container molded by the container molding die 2 has a shape in which the tip (edge) rising in an inclined shape is rounded so as to be curved downward toward the outside of the container (rounded shape). Care is taken not to make the user feel uncomfortable.

Further, on the outside of the container molding die 2, two square frame members 3U and 3D are arranged vertically at equal intervals. The upper frame member 3U functions as a backing member for preventing the molded container from entering the mold 1, and the lower frame member 3D is a punch holder that holds the container molding mold 2 in the center of the mold 1. Is functioning as. Further, a square plate-shaped bottom plate 4 is arranged further below the lower frame member 3D. A cylinder 6 for moving the elevating member 5, which will be described later, in the vertical direction is provided on the upper surface of the bottom plate 4. At the four corners of the bottom plate 4, rod-shaped columns 7 that support the container molding mold 2 and the frame members 3U and 3D are provided above the bottom plate 4.

By the way, a protrusion forming portion 8 is provided on the lower side of the edge of the container molding mold 2 that curves downward as described above. The protrusion forming portion 8 is formed so as to project outward, and a lid engaging protrusion 9 that can engage with the lid can be formed on the outer surface of the container.
Next, the protrusion forming portion 8, which is a feature of the present invention, will be described.
As shown in FIG. 1, a plurality of protrusion forming portions 8 are arranged along the edge of the container. The plurality of protrusion forming portions 8 are arranged so as to be adjacent to each other, and the lid engaging protrusions 9 can be continuously formed on the side surface of the container.

FIG. 2 is a cross-sectional view of the mold 1 of FIG. 1 cut along an X-plane extending in the vertical direction.
As shown in FIG. 2, the protrusion forming portion 8 is in a molded state in which the lid engaging protrusion 9 can be formed on the outer surface of the container by projecting toward the outside of the container along the horizontal direction, and along the horizontal direction. It is possible to switch between a mold release state that enables the container to be removed after molding by retracting toward the inside of the container. Specifically, in the molded state, the lid engaging protrusion 9 is molded by the protrusion forming portion 8 protruding toward the outside of the container. Further, in the detached state, since the protrusion forming portion 8 is retracted toward the inside of the container, it is possible to prevent the protrusion forming portion 8 from coming into contact with the lid engaging protrusion 9 formed on the outer surface of the container. This makes it possible to remove the container from the mold 1.

That is, the protrusion forming portion 8 is configured to switch between a molding state and a mold release state by moving horizontally. However, depending on the structure and arrangement of the drive means for horizontally moving the protrusion forming portion 8, problems such as an increase in the manufacturing cost of the mold and the inability to deploy the protrusion forming portion 8 in close proximity occur. ..
Therefore, in the mold 1 of the present invention, the vertical movement of the elevating member 5 is converted into the horizontal movement of the protrusion forming portion 8 by using the conversion mechanism 10 described later, so that the molding state and the mold release state are obtained. By switching between, it is possible to achieve both a simple structure and close placement.

Specifically, the protrusion forming portion 8 includes a molding member 11 that forms a lid engaging protrusion 9 on the outer surface of the container by moving in and out in the horizontal direction, and an elevating member 5 that can be raised and lowered in the vertical direction. It has a conversion mechanism 10 that converts the up-and-down movement of the elevating member 5 along the vertical direction into a horizontal movement that moves the molding member 11 horizontally.
The forming member 11 is a metal such as SK steel, and is formed in a square shape having a length in the vertical direction rather than a dimension in the horizontal direction. A protrusion molding surface 12 protruding hemispherically toward the outside of the container is formed on the upper portion of the molding member 11. In the molded state, the protrusion molding surface 12 projects slightly outward from the edge of the container molding mold 2 so that the lid engaging protrusion 9 can be molded. On the other hand, in the case of the mold release state, the protrusion molding surface 12 is drawn slightly inward from the edge of the container molding mold 2 so as not to come into contact with the container to be released (inner side surface of the container). It has become.

Further, an insertion hole 14 is formed in the lower portion of the molding member 11 to allow the tip of the connecting shaft 13, which will be described later, to be freely inserted in the vertical direction from the inside of the container to the outside of the container. The insertion hole 14 will be described in detail later.
The elevating member 5 is a square member arranged below the molding member 11 at a distance. A cylinder 6 for raising and lowering the elevating member 5 hydraulically is provided on the lower side of the elevating member 5, and the elevating member 5 can be raised and lowered in the vertical direction by the action of the cylinder 6.

A fixing hole 15 for fixing the base end of the connecting shaft 13 described later in a state where movement in the vertical direction is restricted is drilled in the upper surface of the elevating member 5, and the base end is connected by fixing the base end to the fixing hole 15. The shaft 13 is movable in the vertical direction.
The conversion mechanism 10 described above is a mechanism that converts an elevating motion along the vertical direction of the elevating member 5 into an exit / exit motion of horizontally moving the molding member 11 toward the projecting direction of the lid engaging protrusion 9. In the embodiment, a connecting shaft 13 inclined with respect to the vertical direction is used. In this embodiment, the connecting shaft 13 is used for the conversion mechanism 10, but conversion may be performed by using, for example, a link mechanism or a taper guide mechanism.

Specifically, the conversion mechanism 10 includes a connecting shaft 13 that connects the elevating member 5 and the forming member 11, an insertion hole 14 that is formed in the forming member 11, and a fixing hole 15 that is formed in the elevating member 5. It is composed of.
The connecting shaft 13 is a rod-shaped member arranged in an inclined manner from the lower part inside the container toward the upper part outside the container. The upper end and the lower end of the connecting shaft 13 are formed in a hemispherically rounded shape, and can be moved without being caught inside the insertion hole 14 and the fixing hole 15.

Further, the tip end (upper end) of the connecting shaft 13 is located on the middle side of the insertion hole 14, and the base end (lower end) of the connecting shaft 13 is located inside the fixing hole 15.
The insertion hole 14 is a hole drilled diagonally upward from the lower surface of the molding member 11 so as to incline in the same direction as the connection shaft 13 described above, and the tip of the connection shaft 13 is inserted from below the inside of the container into the container. It is possible to guide in an inclined manner toward the upper part of the outside. An air hole 14a is formed in the upper part of the insertion hole 14 to allow air in the hole to escape when the connecting shaft 13 moves in the hole. Further, a sleeve 14b for assisting the movement of the connecting shaft 13 in the hole is provided in the lower portion of the insertion hole 14.

The fixing hole 15 is a hole drilled diagonally downward from the upper surface of the elevating member 5 so as to incline in the same direction as the connection shaft 13 and the insertion hole 14 described above, and is a base end (lower end) of the connection shaft 13. ) Can be fixed.
That is, the fixing hole 15 is inclined toward the protruding direction of the lid engaging projection 9, similar to the connecting shaft 13 and the insertion hole 14 described above. The connecting shaft 13, the insertion hole 14, and the fixing hole 15 are arranged side by side on one axis so as to be coaxial (hereinafter, in the present specification, a plurality of members are arranged on one axis. Arranged side by side on the heart is called coaxial).

A retaining member 16 having a substantially L-shaped cross-sectional view is provided between the molding member 11 and the container molding mold 2 described above. Specifically, the retaining member 16 has a structure in which a horizontal portion 16a that supports the molding member 11 from below and a vertical portion 16b that extends in the vertical direction are combined. The vertical portion 16b of the retaining member 16 is fixed to the container molding die 2 by using a bolt or the like. Further, the horizontal portion 16a of the retaining member 16 can support the molding member 11 from below. An elongated hole 16c capable of guiding the connecting shaft 13 along the inside and outside directions of the container is formed in the horizontal portion 16a of the retaining member 16.

Therefore, in the protrusion forming portion 8 having the above-described configuration, when the elevating member 5 rises, the connecting shaft 13 whose proximal end side is fixed inside the fixing hole 15 also rises together with the elevating member 5. Here, since the tip of the connecting shaft 13 is located on the middle side of the insertion hole 14 in the molded state, the connecting shaft 13 can move upward inside the insertion hole 14. On the other hand, since the molding member 11 is arranged on the lower side of the edge portion of the container molding die 2, the upward movement is restricted.

Therefore, when the connecting shaft 13 moves upward inside the insertion hole 14, the molding member 11 moves horizontally from the outside of the container toward the inside of the container, and the protrusion molding surface 12 is inside the edge of the container molding mold 2. Retreating, the protrusion forming portion 8 switches from the molded state to the mold release state.
On the other hand, when the elevating member 5 is lowered in the protrusion forming portion 8 in the mold release state, the protrusion forming portion 8 is switched from the mold release state to the molding state by the operation opposite to that in the ascending state.

In the protrusion forming portion 8 described above, by raising and lowering the elevating member 5 using the cylinder 6, the molding member 11 moves horizontally, and the protrusion molding surface 12 moves forward and backward. That is, even if the protrusion forming portions 8 are arranged side by side in the horizontal direction, the elevating mechanism does not get in the way. In this respect, it has been pointed out that the conventional protrusion forming portion is often provided with an elevating mechanism on the side of the protrusion forming portion, and it is difficult to arrange the protrusions in close proximity to each other in the horizontal direction.

That is, in the mold 1 of the present embodiment, a plurality of protrusion forming portions 8 for engaging with the lid are continuously formed along the opening edge or are provided in close contact with each other on the side surface of the container with which the lid is in contact. It is possible to mold a container that can obtain a high degree of airtightness to the contents without causing an increase in manufacturing cost.
It should be noted that the embodiments disclosed this time are exemplary in all respects and are not restrictive. In particular, in the embodiments disclosed this time, matters not explicitly disclosed, for example, the type of processing using the mold 1, the conditions for molding using the mold 1, various parameters, the dimensions of the components, and the weight. , Volume, etc. do not deviate from the range normally implemented by those skilled in the art, and values that can be easily assumed by those skilled in the art are adopted.

1 Mold 2 Container molding mold 2a Bottom surface of container molding mold 2b Side surface of container molding mold 3U Upper frame member 3D Lower frame member 4 Bottom plate 5 Elevating member 6 Cylinder 7 Strut 8 Protrusion forming part 9 Lid engaging protrusion 10 Conversion Mechanism 11 Molding member 12 Protrusion molding surface 13 Connecting shaft 14 Insertion hole 14a Insertion hole air hole 14b Insertion hole sleeve 15 Fixing hole 16 Retaining member 16a Horizontal part of retaining member 16b Vertical part of retaining member 16c Long hole of retaining member

Claims (3)

A mold for molding a bottomed container with a bottom and sides.
The side surface of the container is provided with a protrusion forming portion that projects outward and forms a lid engaging protrusion that can be engaged with the lid.
The protrusion forming portion is
A molding member that forms the lid engaging protrusion by moving in and out in the horizontal direction,
Elevating members that can be raised and lowered in the vertical direction,
A mold characterized by having a conversion mechanism that converts an elevating operation along the vertical direction of the elevating member into an elevating operation of moving the molded member horizontally toward the protruding direction of the lid engaging protrusion. .. The conversion mechanism is
A connecting shaft that connects the elevating member and the molding member,
An insertion hole that is perforated in the molded member and allows the tip of the connecting shaft to be freely inserted in the vertical direction.
It is provided with a fixing hole that is drilled in the elevating member and fixes the base end of the connecting shaft in a state where movement is restricted in the vertical direction.
By arranging the connecting shaft, the insertion hole, and the fixing hole coaxially with respect to the axis inclined toward the protrusion direction of the lid engaging protrusion, the molding is performed in accordance with the elevating and lowering of the elevating member. The mold according to claim 1, wherein the member is movable in the protruding direction of the lid engaging protrusion. The mold according to claim 1 or 2, wherein a cylinder for moving the elevating member in the vertical direction is provided below or above the elevating member.

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