JPH0546767U - Food container lid packing - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the lid from not opening when the temperature of the food in the food container drops. [Structure] An annular packing 21 is assembled in an annular groove 8 in the peripheral portion of the lower surface of the lid 3. When the opening 2 of the container body 1 is closed by the lid 3, the packing 21 abuts on the annular projection 7 surrounding the opening 2 of the container body 1. A communication groove 22 is formed on the contact surface 21a of the packing 21 that contacts the container body 1 from the outer circumference to the inner circumference. [Effect] When the temperature of the food or drink in the container decreases, air flows into the container from the outside through the communication groove 22, and the inside of the container does not become in a decompressed state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a packing for a hermetically sealed food and drink container lid.

[0002]

[Prior Art]

 For example, for business purposes, a food container for storing and transporting food and drink such as soup, and a sealed food and drink having heat insulation properties as shown in FIGS. 6 and 7 for maintaining an appropriate temperature. The container is used. This type of food and drink container comprises, for example, a bottomed cylindrical container body 1 having an open upper surface, and a disk-shaped lid 3 for opening and closing an opening 2 on the upper surface of the container body 1. There is. The container body 1 and the lid 3 are both single-walled stainless steel containers or have a double-walled structure as shown in the figure. Further, in the illustrated heat insulating container, the inside of the double wall of the container body 1 and the lid 3 is filled with a foam layer such as polyurethane foam or polystyrene foam in addition to the vacuum layer or the air layer formed. Some have been done. On the outer peripheral portion of the upper surface of the peripheral wall 6 surrounding the opening 2 of the container body 1, an annular convex portion 7 is formed so as to project upward. On the other hand, on the lower surface of the lid 3, an annular groove 8 into which the annular convex portion 7 of the container body 1 is fitted is formed on the outer peripheral portion, and on the inner peripheral side of the annular concave groove 8, A protruding portion 9 is formed so as to be fitted into the peripheral wall 6 of the container body 1. An annular packing 11 made of an elastic material such as silicone rubber or elastomer is press-fitted and assembled into the annular groove 8. When the lid 3 is closed, the packing 11 comes into contact with the upper surface of the annular projection 7 of the container body 1 so as to be able to come into contact with and separate from the upper surface of the container body 1 to maintain the sealing property between the container body 1 and the lid 3. is there. Further, the conventional packing 11 has a symmetrical shape in both the radial direction and the axial direction, and the both surfaces in the axial direction, that is, the contact surface with the container body 1 and the mounting surface with the lid 3 are flat. Was becoming. A handle 12 is provided at the center of the upper surface of the lid 3. Although not shown, a handle is provided on the upper portion of the outer peripheral surface of the container body 1, and a clamp for holding the lid 3 in a closed state is provided.

[0003]

[Problems to be solved by the device]

 The packing 11 as described above is provided when the food and drink container is required to have water stoppage, but the conventional packing 11 has a completely flat contact surface with the container body 1, Since the contact surface contacts the container body 1 over the entire circumference, the following problems occur. That is, if hot food or drink 16 such as soup is put in the container body 1 and the lid 3 is closed and left as it is for a long time, the temperature of the food or drink 16 in the container gradually decreases, and the water vapor pressure decreases accordingly. As a result of decompressing the inside of the container, the lid 3 cannot be opened.

The present invention is intended to solve such a problem, and can prevent the lid from being opened even when the temperature of the food or drink placed in the food or drink container is lowered. It is intended to provide packing for container lids.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the packing of a food / drink container lid according to the invention of claim 1 comprises a container body having an opening, and a lid for opening and closing the opening of the container body. In the annular packing that is incorporated in the peripheral part of the lid and releasably abuts the peripheral part of the opening of the container body to maintain the hermeticity between the container body and the lid. A communication groove is formed on the abutting surface of the so as to extend from the outer circumference to the inner circumference.

Further, in the packing of the food and drink container lid according to the second aspect of the present invention, in the structure of the first aspect, the contact surface to the container main body and the mounting surface to the lid have different shapes.

On the other hand, in the packing of the food and drink container lid of the third aspect of the present invention, both sides have the same shape and communication grooves are formed on both sides.

[0008]

According to the first aspect of the present invention, when hot food is kept warm, after the food is put into the container body through the opening, the opening of the container body is closed by the lid. In this state, the packing incorporated in the peripheral portion of the lid comes into contact with the peripheral portion of the opening of the container body, whereby the hermeticity between the container body and the lid is maintained. Even if the temperature of the food or drink in the container is lowered by leaving it for a long time, it will not come from outside via the communication groove on the contact surface of the packing with the container main body and from the outer circumference to the inner circumference. Air will not flow into the container and the inside of the container will not be in a decompressed state. Therefore, it is prevented that the lid cannot be opened.

Further, according to the second aspect of the invention, in the packing, the abutting surface to the container body and the assembling surface to the lid have different shapes, and the front and back sides can be distinguished, which is more preferable. The contact surface side has a shape that prevents it from being incorporated into the lid, so that when the packing that was once removed for cleaning etc. is reassembled into the lid, the original contact surface with the container main body becomes the lid surface. Therefore, the communication groove of the packing surely faces the container body and functions.

On the other hand, according to the third aspect of the invention, both sides of the packing have the same shape, and the communication grooves are provided on both sides of the packing. However, the communication groove on the other side will function toward the container body side.

[0011]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. Since the configurations of the container body 1 and the lid 3 of the food and drink container are almost the same as those shown in FIGS. 6 and 7 described above, the same reference numerals are given to corresponding parts, and detailed description thereof will be given. Is omitted. The packing 21 of the first embodiment is also made of an elastic material such as silicone rubber and has an annular shape, but has different shapes on both sides in the axial direction. That is, the lower surface in the axial direction which is the contact surface 21a to the container body 1 is flat, whereas the upper surface in the axial direction which is the mounting surface 21b to the lid 3 is curved in an arcuate cross section. ing. By setting such a shape, the direction of the mounting surface 21b to the lid 3 can be always discriminated, and the packing 21 can be easily press-fitted into the annular groove 8 of the lid 3 from the mounting surface 21b side. From the contact surface 21a side, it is difficult to press-fit into the annular recessed groove 8 and the incorporation into the lid 3 is hindered. Further, at least one portion of the contact surface 21a of the packing 21 is formed with a communication groove 22 that extends from the outer circumference to the inner circumference. The communication groove 22 is in the shape of a straight concave groove and has a cross-sectional shape of a substantially semicircular shape with a radius of 0.5 to 1.5 mm. The packing 21 is press-fitted into the annular groove 8 of the lid 3 from the side of the mounting surface 21b.

Next, the operation of the above configuration will be described. When keeping hot food or drink such as soup warm, the food or drink is put into the container body 1 through the opening 2, and then the opening 2 of the container body 1 is sealed with the lid 3. In this state, the contact surface 21a of the packing 21, which is press-fitted into the annular concave groove 8 of the lid 3 and assembled, comes into close contact with the upper surface of the annular convex portion 7 surrounding the opening 2 of the container body 1. .. Thereby, the airtightness between the container body 1 and the lid 3 is maintained. Even if the temperature of the food or drink in the container body 1 is lowered due to being left for a long time, the outside of the packing 21 comes into contact with the contact surface 21a through the communication groove 22 which is pulled out from the outer circumference to the inner circumference. A slight amount of air flows into the container from the inside, and the inside of the container does not become depressurized. Therefore, when the lid 3 is subsequently opened, the packing 21 together with the lid 3 is easily separated from the container body 1, and the lid 3 can be easily opened. By the way, at the time of washing or the like, the packing 21 is once removed from the lid 3 and then reassembled into the lid 3 after cleaning. However, in this packing 21, the communication groove 22 is formed only on one surface thereof, so if the packing 21 is mistakenly incorporated into the lid 3 from the side having the communication groove 22, the communication groove 22 will be empty. It will not function due to venting, and the lid 3 will not open as the temperature of food and drink in the container body 1 decreases. Therefore, in the first embodiment, it is easy to determine whether the packing 21 should be assembled in the lid 3 in any direction from the difference in shape between the contact surface 21a side and the mounting surface 21b side of the packing 21. obtain. In addition, since the packing 21 has a shape that makes it easier to assemble the packing 21 into the lid 3 from the abutment surface 21a side than from the abutment surface 21a side, the packing 21 is erroneously assembled in the lid 3 upside down. It doesn't come out. That is, the packing 21 can be surely assembled in the lid 3 from the original installation surface 21b side. Therefore, the communication groove 22 of the packing 21 surely faces the container body 1 side, and functions to release air.

FIG. 3 shows a second embodiment of the present invention. In the second embodiment, the communication groove 27 formed in the packing 26 is bent into a Z shape. Of course, the communication groove 27 is cut out from the outer circumference to the inner circumference of the packing 26. The communication grooves 22 and 27 serve as a path for heat to escape and slightly lower the heat insulating property. However, by bending the communication groove 27 to be long as in the second embodiment, it is possible to prevent heat from escaping. The heat insulation can be further improved.

FIG. 4 shows a third embodiment of the present invention. The packing 31 of the third embodiment has the same shape with both sides 31a and 31b being flat. Then, communication grooves 32 and 33 are formed on both surfaces 31a and 31b of the packing 31, respectively. These communication grooves 32, 33 have a substantially triangular cross section with a width of 0.5 to 1.5 mm and a depth of 0.5 to 1.5 mm. In terms of strength, it is better that the communication grooves 32, 33 on both surfaces 31a, 31b are not located at the same position. In fact, in the third embodiment, the communication grooves 32, 33 on both surfaces 31a, 31b are positioned 180 ° apart. According to the configuration of the third embodiment, no matter which surface 31a, 31b the packing 31 is assembled into the lid 3, the communication grooves 32, 33 on the other surface 31a, 31b are located on the container body 1 side. Facing to and will function for venting. In other words, both sides 31a and 31b of the packing 31 can both serve as a contact surface for the container body 1 and a mounting surface for the lid 3, and the packing 31 can be mounted in the lid 3 in either direction. , It becomes unnecessary to judge the orientation of the packing 31 at the time of assembling.

FIG. 5 shows a fourth embodiment of the present invention. The packing 36 of the fourth embodiment has a circular cross section. A communication groove 37 is formed at one location of the packing 36 and is formed into an annular groove along the entire circumference thereof. With the configuration of the fourth embodiment, the same operational effect as that of the third embodiment can be obtained.

The present invention is not limited to the above embodiment, and various modifications can be made. For example, when the communication groove is formed only on one surface of the packing, a marking may be formed on one surface of the packing so that the surface having the communication groove can be seen. Further, the shapes of the packing and the communication groove are not limited to those in the above-mentioned respective embodiments. In addition, although each of the above-described embodiments has been described by exemplifying a heat insulating container, the present invention is not limited to this, and it is needless to say that the present invention can be applied to a closed container having a single wall.

[0017]

[Effect of the device]

 According to the invention of claim 1, in the annular packing which is incorporated in the peripheral portion of the lid of the food and drink container and abuts on the peripheral portion of the opening of the container main body to maintain the hermeticity between the container main body and the lid, Since the communication groove that goes from the outer circumference to the inner circumference is formed on the contact surface with the container body, even when the temperature of the food or drink put in the food and drink container falls, the container can be externally connected via the communication groove. It is possible to prevent the inside of the container from being in a depressurized state due to the inflow of air into the inside, and thus to prevent the lid from opening.

Further, according to the second aspect of the invention, in the packing, the contact surface with the container body and the mounting surface with the lid have different shapes, so that the front and the back can be easily distinguished, which is also preferable. When the shape of the contact surface side opposite to the surface to be assembled into the lid is set to a shape that prevents the surface from being incorporated into the lid, when the packing once removed for cleaning etc. is reassembled into the lid, It is possible to prevent the contact surface of the assembly from being installed toward the lid, so that the communication groove of the packing can function reliably.

Further, according to the invention of claim 3, both sides of the packing have the same shape, and the communication groove is formed on each of the both surfaces, so that the communication groove functions even if the packing is installed in either direction. To be made.

[Brief description of drawings]

FIG. 1 is a sectional view of a food and drink container in the vicinity of packing according to a first embodiment of the present invention.

FIG. 2 shows the same packing as above, (a) is a bottom view, (b) is a cross-sectional view, and (c) is a side view.

FIG. 3 is a bottom view of the vicinity of the communication groove showing the packing of the second embodiment of the present invention.

4A and 4B show a packing according to a third embodiment of the present invention, wherein FIG. 4A is a right side view, FIG. 4B is a plan view, FIG. 4C is a bottom view, and FIG.

5A and 5B show a packing according to a fourth embodiment of the present invention, wherein FIG. 5A is a bottom view and FIG. 5B is a sectional view.

FIG. 6 is a cross-sectional view showing an example of a conventional food and drink container.

FIG. 7 is an enlarged view of the vicinity of the packing shown in FIG.

[Explanation of symbols]

 1 Container main body 2 Opening part 3 Lid 21 Packing 21a Contact surface 21b Assembly surface 26 Packing 27 Communication groove 31 Packing grooves 31 Packing 31a, 31b Both sides (contact surface, assembly surface) 32 Communication groove 33 Communication groove 36 Packing 37 Communication groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuneo Watanabe 1845 Higashiota, Tsubame City, Tsubame City, Niigata Prefecture Endo Manufacturing Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A food and drink container comprising a container body having an opening and a lid for opening and closing the opening of the container body. In an annular packing that contacts the peripheral part so as to be able to come into contact with and separate from the container body and maintains the hermeticity between the container body and the lid, a communication groove is formed on the abutting surface of the container body, the communicating groove coming out from the outer periphery to the inner periphery Packing for food and drink container lids. 2. The packing for a food / drink container lid according to claim 1, wherein a contact surface with respect to the container body and an assembling surface with respect to the lid have different shapes. 3. The packing for a food / drink container lid according to claim 1, wherein both sides have the same shape and a communication groove is formed on each of the both sides.