JPH0516628U - Lid for food storage container - Google Patents

Abstract

(57) [Summary] [Purpose] By reducing the maximum value of the force required for the lid opening operation, it is possible to achieve the lid opening operation smoothly, accurately and stably with an appropriate force. Is to [Structure] A ring plate 5 provided with a claw piece 7 provided with a handle piece 10 at a tip end thereof, and an assembled cylinder piece 12 which is located on the outer periphery of the ring plate 5 with a narrow space therebetween, and a plurality of connecting pieces 11 And a laminated aluminum sheet 16 which is tightly welded so as to cover the entire lower surface of the lid body 2, and the gap between the ring plate 5 and the assembled tubular piece 12 is set to one side. The ring plate 5 is provided by providing the contact piece 15 that holds the contact plate constant by contact.
And the assembled cylinder piece 12 sufficiently reduce the number of the connecting pieces 11 without deteriorating the constant mutual posture holding force, and thus the lid 1
The opening operation force of is reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lid attached to a food container for hermetically storing food to be heat-treated after hermetically storing retort food or the like.

[0002]

[Prior Art]

 For containers that store food that is heat-treated after hermetically storing such as retort pouch foods, first of all, it is necessary to ensure the hermeticity up to opening and to make the operation at the time of opening simple and reliable. desired.

[0003] In this type of container, a container is often molded with a synthetic resin because it is easy to mold and handle, and can be obtained at low cost. For example, a configuration is considered in which an aluminum laminated sheet is welded to the lower surface of the lid body and the aluminum laminated sheet is broken and removed together with a part of the lid body when opening.

For example, the food storage container disclosed in Japanese Utility Model Laid-Open No. 2-111623 is a typical container of this type, in which a lid body fitted to the opening of the container is made of synthetic resin. And a laminated aluminum sheet which is welded to the lower surface of the lid member and whose peripheral edge is welded to the rim of the opening of the container.

The lid member of the lid body has a tip-shaped lancet, and a claw piece integrally extending the handle piece rearward is provided on a peripheral edge of a ring plate integrally formed at the tip portion. The assembly-made tubular piece that is fitted to the rim of the container is connected through a plurality of easily breakable connecting pieces.

[0006] In opening the lid, the first step of pulling up the handle piece of the lid member lowers and displaces the puncture formed on the tip edge of the claw piece to rupture the aluminum laminated sheet portion immediately below and continue. In the second step, which is the pulling up of the handle piece, the connection piece is broken and the ring plate is separated from the assembled tube piece, and the broken part of this aluminum laminated sheet is expanded along the outer peripheral edge of the ring plate. Achieve by going.

[0007]

[Problems to be solved by the device]

 However, in the above-described conventional technique, when breaking the aluminum laminated sheet while breaking the connecting piece for the lid opening operation, a breaking force of a plurality of connecting pieces requires an unexpected force, especially There was a problem that a large operation force was required at the beginning of the stage.

That is, in the conventional technique in which six connecting pieces are provided symmetrically at each equal center angle, the lid opening operation is performed as shown by the characteristic curve a showing the lid opening characteristic of FIG. An operation force of 2.47 Kgf is required for the first step (A operation step of pulling up the handle piece in Fig. 1), and the second step (B operation step of pulling up the entire ring plate in Fig. 1) requires an initial operation. The opening operation force of 7.12 Kgf, which is nearly three times that of the first step, is required, and the operation force of this first step and the operation force required to break the last part of the aluminum laminated sheet are 1.78 Kgf. There was a problem that the value was extremely large compared to, and the feeling of the actual opening operation was poor.

As one measure to solve this problem, in order to reduce the operation force for breaking, the number of connecting pieces is reduced, and the operation force at the initial stage of opening is applied only to the aluminum laminated sheet. In addition, it is considered that the installation position of the connecting piece should be as rearward as possible. However, such a structure leaves a problem in the assembling strength between the ring plate and the assembling cylinder piece.

That is, when the number of connecting pieces is small and the installation intervals of adjacent connecting pieces are large as in the above-described structure, the pressing force is increased along the radial direction at the location where the connecting pieces are not provided. When a tensile force is applied, the assembling strength between the ring plate and the assembled cylinder piece is weak, so the mutual positional relationship between the ring plate and the assembled cylinder piece fluctuates in the stage before welding the aluminum laminated sheet. In some cases, it may be distorted, and accurate welding of the aluminum laminated sheet may not be achieved, and there is a problem that the connecting piece is broken and broken.

Therefore, the present invention was devised in order to solve the above-mentioned problems in the prior art. The number of connecting pieces for integrally connecting the ring plate and the assembling cylinder piece is the same as that of the ring plate and the assembling piece. The technical issue is to reduce the mutual posture holding force with the tube piece as much as possible without deteriorating, so that the opening of the lid can be achieved with a small force and a good feeling, but it is also structurally stable. The purpose is to make things.

[0012]

[Means for Solving the Problems]

 Means for solving the above technical problem is to provide a claw piece having a tip-shaped lancet and a handle piece extending rearward, and a ring integrally formed with the claw piece at the tip. Plate and a cylindrical piece with an assembly that is connected and connected to the periphery of the ring plate and that fits on the rim of the opening of the container, and an assembled tube that connects the cylindrical piece with the assembly to the peripheral edge of the ring plate. A plurality of easily breakable connecting pieces that are located asymmetrically between the piece and the ring plate, and a fixed gap is maintained between the assembled cylinder piece and the ring plate in the part where the connecting pieces are not provided. Therefore, a lid body made of synthetic resin is provided, which is formed by projecting at one edge of the outer peripheral edge of the ring plate and the inner peripheral edge of the assembled cylinder piece, and the abutting piece whose tip abuts against the other edge. Positioned so as to cover the entire lower surface of the lid main body, the lower surface of the ring plate of the lid main body and the lower surface of the assembled tubular piece, and the container It has an aluminum laminated sheet that is tightly welded to the entire peripheral surface of the opening edge.

As few as possible connecting pieces are arranged apart from the claw pieces within a range that does not cause a strange displacement of the ring plate with respect to the assembled cylinder piece, and contact pieces are provided between adjacent connecting pieces that are widely spaced. It is better to position.

Three connecting pieces are provided, the first connecting piece is located slightly rearward of the front edge line on one of the left and right sides of the claw piece, and the second connecting piece has a central angle of 90 ° or more with respect to the front-rear direction. The first connecting piece and the second connecting piece by placing the third connecting piece near the rear end of the first connecting piece on the left and right sides. And between the second connecting piece and the third connecting piece.

Further, it is preferable that the claw piece and the ring plate main body are connected to each other through a bending groove formed in a posture orthogonal to the front-rear direction.

[0016]

[Action]

 The container that holds food is hermetically held at its entire peripheral edge by an aluminum laminated sheet that is tightly welded to the entire peripheral surface of the mouth edge of the opening of the container.The aluminum laminated sheet that seals this container is It is mechanically protected through the aluminum laminated sheet or directly by the lid body welded to the rim of the opening of the container.

To open the container, the handle piece is hooked on a fingertip and pulled up, whereby the claw piece is tilted downwardly displaced about the connecting portion with the ring plate body as a fulcrum. The aluminum laminated sheet directly below is broken by the puncture which is the tip edge. The rupture of the aluminum laminated sheet in the first stage is achieved by the tilting using the lever action centering on the connecting part of the claw piece with the ring plate body, so that the first rupture of the aluminum laminated sheet also occurs. Nevertheless, it is possible to break the aluminum laminated sheet with a comparatively weak operating force.

If a bent groove is formed in the connecting portion between the claw piece and the ring plate body, the bent groove portion is easily bent and deformed, so that the claw piece is easily tilted and displaced with respect to the ring plate body. Since the two bending grooves provide a rotation axis for tilting displacement of the claw piece with respect to the ring plate body, the tilting displacement of the claw piece becomes accurate.

Following the first step of breaking the aluminum laminated sheet by the claw pieces and further pulling up the handle piece to reach the second step of breaking the aluminum laminated sheet, the pulling force acting on the ring plate is It acts concentratedly on the aluminum laminated sheet portion located between the plate and the assembled tubular piece, and breaks this aluminum laminated sheet portion.

The second-stage breaking operation of the aluminum laminated sheet in which the ring plate is tilted up and down with respect to the assembled cylinder piece is performed in a state where the breaking force is uniformly applied to the left and right aluminum laminated sheet portions. Although it was achieved, at the beginning of the second stage of this breakage, the aluminum laminated sheet part except the part facing the claw piece was in the state of connecting the ring plate and the assembled tube piece, so The upward tilting of the ring plate with respect to the piece is achieved without tilting left or right.

At this time, since the plurality of connecting pieces are arranged asymmetrically to the left and right, the connecting piece closest to the claw piece is only one of the left and right sides, and the ring plate that tilts upward is attached. Since it is regulated that the posture of the cylinder piece is tilted to the left and right, part of the pulling force that acts on the ring plate is concentrated on one connecting piece that is closest to this claw piece. It acts and breaks this connecting piece with a relatively weak force.

When the second stage of breakage of the aluminum laminated sheet portion between the ring plate and the assembled tubular piece proceeds to some extent, the inclination angle of the ring plate with respect to the assembled tubular piece increases, so The pulling force that acts effectively acts to break the aluminum laminated sheet portion, and the subsequent breaking of the aluminum laminated sheet portion is achieved with a relatively weak pulling force.

In the second stage of the unsealing operation after breaking the above-mentioned aluminum laminated sheet, it takes a relatively large operating force to break the connecting piece, although it is easy to break. It is desirable that the number of connecting pieces is as small as possible.Therefore, the number of connecting pieces should be three arranged at a certain central angle or more, and the first connecting piece should be on either side of the claw piece. One of the remaining two connecting pieces may be arranged at the other left or right position with a central angle of 90 ° or more with respect to the front-rear direction so as to be located closer to the front edge line.

By thus setting the number and arrangement of the connecting pieces, the distance between the connecting piece closest to the claw piece and the connecting piece next closest to it can be increased in the front-rear direction. As a result, it is possible to increase the degree of concentration of the breaking force on the connecting piece that is closest to the claw piece at the beginning of the second stage of breaking, which reduces the operating force at the beginning of the second stage of breaking. can do.

In addition, before the aluminum laminated sheet is welded and assembled to the lid body, the ring plate and the assembled cylinder piece are held in their mutual postures by a plurality of connecting pieces, and also by the abutting piece. Since the mutual attitude is maintained, the mutual attitude between the lid main body and the aluminum laminated sheet can be stably maintained, and thus the handling of the lid main body is stabilized.

Similarly, the abutment piece that functions to keep the mutual positional relationship between the ring plate of the lid body and the assembled cylinder piece constant does not integrally connect the ring plate and the assembled cylinder piece. Therefore, when opening the lid, no force is required to cut the contact piece, and the opening force is not increased by providing the contact piece.

[0027]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The container 17 has a bottomed cylindrical shape made of synthetic resin in which a bottom wall 19 is connected to the lower end of a cylindrical wall 18 having a cylindrical shape, and the lid 1 of the present invention has an opening edge of the container 17. It is tightly fitted and assembled.

The lid main body 2 of the lid body 1 is a synthetic resin unitary body in which a ring plate 5 having a claw piece 7 and an assembling cylinder piece 12 are connected by a connecting piece 11. The ring plate-shaped top plate 3 is continuously connected to the outer peripheral edge of the ring plate 5 through the outer peripheral edge of the ring plate 5 via the standing wall piece 4 of a short semi-cylindrical piece having an extremely low height. The assembled cylindrical piece 12 connected through 11 has a narrow outer flange located at the uppermost position of the lid main body 2 at the upper end of the inner cylindrical portion provided with a narrow inner flange piece at the lower end of the inner peripheral surface. It has a double-cylinder structure in which the outer cylinder part is connected in a hanging manner via a piece, and the lid of the lid is firmly fitted by fitting the opening edge of the container 17 between the inner cylinder part and the outer cylinder part. A fit of one to the container 17 is achieved.

Since the top plate 3 has a substantially half ring disk shape, the front half of the five ring plates connected to the claw piece 7 has a thin ring plate piece shape in which the void 13 is formed inside. For this reason, it is easily bent and deformed in the vertical direction, and a window hole 14 is formed at the rear end of the standing wall piece 4 that connects the top plate 3 and the ring plate 5 to each other. The water accumulated between the aluminum laminated sheet 15 and the aluminum laminated sheet 15 can be discharged.

The claw piece 7 formed at the tip of the ring plate 5 has an isosceles triangular plate shape with a tip having a pointed protrusion 8, and is a continuous portion with the ring plate 5 main body. At the left and right sides of the rear edge, the claw piece 7 can be easily tilted and lowered with respect to the ring plate 5 main body, and at the same time, the claw piece 7 can be tilted so that the tilted and lowered displacement can be performed stably and constantly. A bending groove 6 that provides an axis of motion is formed along a direction orthogonal to the front-rear direction, and a tip portion extending through a step portion 9 is provided at a central portion of a rear end edge of the claw piece 7. A handle piece 10 having a hole for hooking a fingertip at the center of the part is extended rearward so as to fit in the center portion of the top plate 3.

There are three connecting pieces 11 for connecting the ring plate 5 and the assembled cylinder piece 12 with a slight gap between the outer peripheral edge of the ring plate 5 and the inner peripheral edge of the assembled cylinder piece 12. The first connecting piece 11 is located slightly rearward of the tip edge line on one side of the slanted linear shape of the claw piece 7, and the second connecting piece 11 is 105 in the front-back direction. It is located on the other side with a central angle of °, and the third connecting piece 11 is located on one side with a central angle of 135 ° with respect to the front-rear direction on the side opposite to the pawl piece 7. There is.

That is, the three connecting pieces 11 are provided with the minimum number and arrangement within a range in which the mutual postures of the ring plate 5 and the assembled tube piece 12 can be kept constant, and as a whole, as much as possible. It is arranged apart from the claw piece 7.

In this way, since the connecting pieces 11 are eccentrically arranged, the gaps between the adjacent connecting pieces 11 are not uniform, so that the ring plate 5 is located on the side where the connecting pieces 11 are widely separated from each other. Is likely to be displaced with respect to the assembled tube piece 12, and this displacement may cause the connection piece 11 to break illegally. Is provided, it is possible to reliably prevent the ring plate 5 from being improperly displaced with respect to the assembled cylinder piece 12.

That is, on the outer peripheral edge of the ring plate 5, particularly between the first connection piece 11 and the second connection piece 11 in which the intervals between the connection pieces 11 are large, and the second connection piece 11. An abutment piece 15 is provided so as to project between the 11 and the third connection piece 11 so that the mutual posture between the ring plate 5 and the assembled tube piece 12 is stable and constant.

That is, as a result of arranging the connection pieces 11 as described above, the central angle α plus β, that is, the central angle 175 ° is also present between the first connection piece 11 and the second connection piece 11. The center angle of 120 ° is opened between the second connection piece 11 and the third connection piece 11 by opening. However, by arranging the contact piece 15 in the above-described form, it is assembled with the ring plate 5. Since it is possible to reinforce between the attached tubular piece 11 and the abutting piece 15 only abuts on the inner peripheral edge of the assembled tubular piece 12, there is no influence on the breaking operation. In the illustrated embodiment, the abutment piece 15 is provided on the outer peripheral edge of the ring plate 5, but the abutment piece 15 may be provided on the inner peripheral edge of the assembled tubular piece 12. .

The aluminum laminated sheet 16 that constitutes the lid body 1 in combination with the lid body 2 includes the peripheral edge portion of the entire lower surface of the ring plate 5 including the claw pieces 7 and the assembled tubular piece 12. It is densely welded to the entire lower surface and the entire inner peripheral surface of the inner cylindrical portion. The outer peripheral surface of the portion welded to the inner peripheral surface of the inner cylindrical portion is tightly welded, and thus the container 17 is sealed.

The dense welding of the aluminum laminated sheet 16 to the lid body 2 and the container 17 is advantageously accomplished by using ultrasonic wave welding means.

As shown in FIG. 1, the opening operation by pulling up the handle piece 10 is performed by pulling up the handle piece 10 diagonally upward and upward with the bending groove 6 as a rotation axis, that is, breaking of the aluminum laminated sheet 16 part. According to the first stage, the aluminum laminated sheet 16 portion immediately below is pierced by the piercing 8 and ruptured, and then the aluminum laminated sheet 16 portion immediately below is ruptured along the straight tip edges of the claw pieces 7 inclined to the left and right, and then By the pulling up operation B of the handle piece 10 diagonally rearward and upward, that is, the second step of breaking the aluminum laminated sheet 16 portion, the aluminum laminated sheet 16 portion between the ring plate 5 main body and the assembled tubular piece 12 is moved to the front side. Then, the container 17 is opened by sequentially rupturing from the rear side toward the rear side.

At the beginning of the second stage of breaking the part of the aluminum laminated sheet 16 in the opening operation of the container 17, the first half of the ring plate 5 continuous with the claw piece 7 has a simple flat plate structure. It is easily bent upward by the action of the pulling force via the pulling force, so that the pulling force concentrates as a breaking force on the fracture progressing portion of the aluminum laminated sheet 16 and the first connecting piece 11, and the aluminum laminated sheet 16 portion and the The breakage of the first connecting piece 11 is easily, reliably and stably achieved with a small pulling force.

FIG. 6 shows the unsealing operation characteristics. The characteristic curve b of the embodiment of the present invention shown in FIGS. 1 to 5 and the characteristic curve a in the prior art in which six connecting pieces are symmetrically provided. According to the actual measurement, the pulling force as the unsealing force required for the operation A is 2.47 Kgf in the conventional example, but is also approximately 2.80 Kgf in the case of the present invention. However, the pulling force at the beginning of operation B is 7.12 Kgf in the conventional example, whereas it is 4.00 Kgf in the case of the present invention, which is extremely small, and the aluminum laminated sheet portion remaining at the final stage of opening is The operating force required to break was 1.78 Kgf in the case of the conventional example, while it was almost the same as 1.99 Kgf in the case of the present invention.

From the above, the present invention can reduce the maximum value of the opening force by the difference S, S = 7.12-4.00 = 3.12, as compared with the conventional example, which is required for opening. Since the difference between the initial operating force of operation B, which is the maximum force, and the maximum operating force of operation A and the final operation, can be reduced, it is possible for the operator to get stuck during the opening operation. The degree is light and the feeling of opening operation is extremely good.

[0042]

[Effect of the device]

 Since the present invention has the above-mentioned configuration, it has the following effects. Since a plurality of connecting pieces were arranged asymmetrically in the front-back direction in which the opening operation force acts, the opening operation was performed at the beginning of the second-stage aluminum laminated sheet breaking operation after the aluminum pieces were broken by the claw pieces. Since a part of the force is concentrated on one connecting piece, it is possible to reduce the operating force at the beginning of the second-stage rupture operation, which requires the greatest operating force, and thus the total operating force required for opening is reduced. It can be made smaller to facilitate the opening operation itself.

Since the operating force in the opening operation process that requires the largest operating force can be reduced, the degree of change in the operating force that changes from the start to the completion of opening can be reduced. As a result, it is possible to reduce the feeling of being caught when the bag is actually opened, so that a smooth and stable opening operation can be obtained, and a good opening feeling can be obtained.

Since one of the outer peripheral edge of the ring plate and the inner peripheral edge of the assembling cylinder piece is provided with a contact piece whose tip comes into contact with the other edge, the ring plate is formed as a result of reducing the number of connecting pieces. Since the instability of the mutual positional relationship with the assembled tubular piece can be eliminated and it can be made structurally stable, and it is possible to reduce the number of connecting pieces, the operating force required for opening It is possible to achieve a further reduction of

[Brief description of drawings]

FIG. 1 is an explanatory view showing an entire longitudinal section of a container to which an embodiment of a lid according to the present invention is assembled and showing a procedure of an opening operation.

FIG. 2 is an overall plan view showing an embodiment of a lid according to the present invention.

FIG. 3 is an enlarged plan view of a connecting piece portion.

FIG. 4 is an enlarged plan view of a contact piece portion.

FIG. 5 is an enlarged vertical cross-sectional view of the contact piece portion taken along the line EE in FIG.

FIG. 6 is a characteristic diagram showing the opening operation force characteristics of the embodiment of the present invention shown in FIG. 1 and the opening operation force characteristics of the conventional example.

[Explanation of symbols]

1; Lid body 2; Lid body 3; Top plate 4; Standing wall piece 5; Ring plate 6; Bending groove 7; Claw piece 8; Protrusion 9; Step portion 10; Handle piece 11; Connection piece 12; Assembly tube piece 13; Vacancy 14; Window hole 15; Contact piece 16; Aluminum laminated sheet 17; Container 18; Cylinder wall 19; Bottom wall

Claims (4)

[Scope of utility model registration request] 1. A ring plate (5) integrally formed at the tip end with a claw piece (7) integrally formed with a handle piece (10) extending backward and having a tip-shaped lancet (8). ), The assembled tubular piece (12) fitted to the rim of the container (17) is continuously provided via a plurality of easily breakable connecting pieces (11) located asymmetrically, and the ring plate A lid body made of a synthetic resin in which an abutting piece (15) whose tip abuts against the other edge is provided on either one of the outer edge of the (5) and the inner edge of the assembling tubular piece (12) ( 2), located so as to cover the entire lower surface of the lid body (2), the lower surface of the ring plate (5) and the lower surface of the assembled tubular piece (12), and the entire peripheral surface of the rim of the container (17). A lid for a food storage container, which comprises an aluminum laminated sheet (16) which is tightly welded. 2. Arrangement of as few connecting pieces (11) as possible as far as possible from the pawl pieces (7) within a range that does not cause unnatural displacement of the ring plate (5) relative to the assembled tubular piece (12), The lid for a food storage container according to claim 1, wherein an abutment piece (15) is positioned between the adjacent connection pieces (11) which are spaced apart from each other. 3. A first connecting piece (1) provided with three connecting pieces (11).
Position 1) slightly behind the front edge line on one of the left and right sides of the claw piece (7), and place the second connecting piece (11) at a central angle of 9 in the front-back direction.
The third connecting piece (11) is located near the rear end of one side of the first connecting piece (11) on the left and right sides of the contact piece (15). ), The first connecting piece (1
The lid for a food storage container according to claim 1 or 2, wherein the lid is arranged between the 1) and the puncture (8) and between the second connecting piece (11) and the third connecting piece (11). .. 4. The method according to claim 1, wherein the claw piece (7) and the main body of the ring plate (5) are connected to each other through a bending groove (6) formed at a right angle to the front-rear direction. The lid for a food storage container described.