JP2008265799A - Receptacle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a receptacle capable of keeping the opening/closing torque for a lid body at a low level while maintaining airtightness. <P>SOLUTION: The receptacle includes a receptacle body 20 having an opening part 21, a lid body 30 that covers the opening part 21, and a plate-like packing 40 equipped on the under surface 33a of the top plate 33 of the lid body, with the circumferential end of the packing 40 being airtightly kept joined, when the lid is closed, to the upper end surface of the opening part 21. A first rib 41 and a second rib 42 are respectively erected upright from the upper surface of the packing 40, at positions inward of the circumferential end part of the packing 40 and on the circumferential end part. The second rib 42 is kept apart from the lid body 30 while the lid is opened, whereas, during the process of closing the lid, as the first rib 41 is kept in contact with the under surface 33a of the top plate 33 of the lid body 30, the second rib 42 is so constituted as to come in contact with the under surface 33a of the top plate 33 of the lid body 30 or with the circumferential inner wall of the lid body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a container having a plate-like packing attached to the inner surface of a top plate of a lid.

  There is known a container having an alignment mechanism in which a lid covering an opening of the container body is always closed at a fixed position with respect to the container body. In a normal container that does not have an alignment mechanism, the lid may be screwed to a position where the sealed state by the lid is ensured. However, in a container that has an alignment mechanism, the lid is against the container body. When a certain position is reached, a sufficient sealing state needs to be realized. For this reason, in a container having a conventional alignment mechanism, for example, as shown in FIG. 8, a resin-molded plate-like packing 140 is attached to the lower surface of the top plate 133 of the lid 130 to ensure a sufficiently sealed state. is doing. An O-ring 140A is attached to the peripheral end on the upper surface of the packing 140, and the O-ring 140A is elastically deformed by the closed lid, so that the peripheral end 140B of the packing 140 is an opening of a container body (not shown). It is in close contact with the upper end surface of 121 and airtightness is ensured.

  However, in the container described above, the number of members constituting the container is increased due to the use of the O-ring. Furthermore, the number of assembly steps for the container increases. Further, if it is attempted to secure the airtightness only with the molded packing without using the O-ring, it is necessary to set the torque tightly in order to increase the contact of the molded packing, and the usability deteriorates.

  In addition to the container described above, Patent Document 1 proposes a container having an alignment mechanism in which a stopper device having a specific structure is disposed between a container body and a cap. This stopper device is mounted so as to align with the outer peripheral surface of the mouth portion of the container body, and closes the mouth portion by being in close contact with the cylindrical screw tube portion screwed into the mouth portion. The elastic sealing portion to be connected is connected by an elastic deformation portion that can be elastically deformed. The screw cylinder portion is formed of a rigid body, and the elastic sealing portion and the elastic deformation portion are formed of an elastic body, which are integrated and formed as a single component.

  In the container described in the same document, although a member such as an O-ring is not used, since the screw tube portion and the elastic contact portion in the stopper device are made of different materials, the stopper device is manufactured integrally. In this case, it is necessary to use a two-color molding method. In the case where it is not manufactured integrally, it is necessary to manufacture each member separately, and then join and integrate them. Regardless of which manufacturing method is adopted, the manufacturing process is complicated, and the manufacturing cost becomes high.

Japanese Patent Laid-Open No. 9-240705

  Accordingly, an object of the present invention is to provide a container that can eliminate the drawbacks of the prior art described above.

The present invention has a container body having an opening, a lid covering the opening, and a plate-like packing attached to the lower surface of the top plate of the lid, and the peripheral edge of the packing when the lid is closed The container is in close contact with the upper end surface of the opening,
A first rib and a second rib standing from the upper surface of the packing are respectively provided at a position inward from the peripheral end of the packing and at a position of the peripheral end, and the second rib is a lid in the opened state. In the closing process, the first rib is in contact with the lower surface of the top plate of the lid body, and the second rib is on the lower surface of the top plate of the lid body or the inner surface of the peripheral wall of the lid body. A container configured to abut is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the container which can make the opening / closing torque of a cover body into a low level is provided, maintaining airtightness. Moreover, the container of this invention can be made excellent in economical efficiency by not using sealing means, such as an O-ring, but reducing the number of parts which comprise a container.

  The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 is an exploded perspective view of a container according to an embodiment of the present invention. 2 is a longitudinal sectional view of the container shown in FIG. 1 in a closed state. The container 10 of the present embodiment is particularly suitably used for housing a creamy viscous fluid. As shown in FIG. 1, the container 10 of this embodiment has the container main body 20, the cover body 30, and the plate-shaped packing 40 attached to the cover body. In the container 10, after the contents are stored in the container body 20, the male screw 22 formed on the outer peripheral surface of the opening 21 of the container main body 20 and the inner peripheral surface of the peripheral wall 31 of the lid 30 are formed. The female screw 32 is screwed. By screwing, the peripheral end portion of the packing 40 attached to the lid body 20 comes into close contact with the upper end surface of the opening portion 21 of the container body 20, and airtightness in the container is ensured.

  As shown in FIG. 2, the container body 20 has a double structure including a cup-shaped inner body 23 and a cup-shaped outer body 24 that is slightly larger than the inner body 23. The inner body 23 has a circular cross section. On the other hand, the cross section of the outer body 24 is a quadrangle with rounded corners. In addition, each side of the quadrilateral has a gentle curve that is convex outward. The inner body 23 and the outer body 24 are fitted in the fitting portion 25 so that the integral state is maintained.

  The inner body 23 has a cylindrical part extending upward from the opening end of the outer body 24, and the part forms the opening 21 of the container body 20. As described above, the male screw 22 is formed on the outer peripheral surface of the opening 21. As shown in FIG. 1, a fitting portion 26 is formed at the lower end portion of the male screw 22 formed in the opening 21 for positioning the container body 20 and the lid 30 when the lid is closed. . A pair of fitting portions 26 are formed at positions facing the opening 21 at 180 degrees. The fitting portion 26 includes a pair of convex portions 27A and 27B and a concave portion 28 positioned therebetween. Of the two convex portions 27A and 27B, the convex portion 27A located on the near side along the direction in which the lid 30 is closed by screwing is slightly smaller than the convex portion 27B located on the far side. Yes.

  The lid 30 has a top plate 33 that is a quadrangle with rounded four corners in plan view, and a skirt portion 34 that hangs downward from the peripheral edge of the top plate 33. The shape of the cross section of the skirt portion 34 is the same as the shape of the cross section of the outer body 24 in the container body 20. That is, the four corners are rounded quadrilaterals, and each side of the quadrilateral is a gently curved curve that is convex outward. A fitting convex portion 35 is formed at the lower end of the inner wall of the skirt portion 34. A pair of fitting projections 35 are formed at positions facing each other by 180 degrees in the skirt portion 34. In a state where the lid 30 is screwed into the opening 21 of the container main body 20 and closed, the fitting convex portion 35 gets over one convex portion 27A in the fitting portion 26 provided in the container main body 20. It fits into the concave portion 28 between the two convex portions 27A and 27B. As a result, the container body 20 and the lid 30 are positioned in the closed state. That is, the fitting convex portion 35 and the fitting portion 26 form a positioning mechanism for closing the lid 30 at a fixed position with respect to the container body 20.

  At a position closer to the center than the skirt portion 34, the peripheral wall 31 hangs from the lower surface of the top plate 33. The peripheral wall 31 has a cylindrical shape, and the above-described female screw 32 is formed on the inner peripheral surface thereof. A fitting portion 36 hangs down from the lower surface of the top plate 33 at a position closer to the center than the peripheral wall 31. The fitting portion 36 has a cylindrical shape and is concentric with the peripheral wall 31 described above. The fitting part 36 is a part which attaches the packing 40 mentioned later to the cover body 30 by fitting.

  The packing 40 has a flat disk shape as shown in FIG. The diameter of the packing 40 is slightly smaller than the inner diameter of the peripheral wall 31 in the lid 30. Further, the diameter of the packing 40 is substantially the same as the diameter of the opening 21 of the container body 20. The packing 40 is made of a resin molded product and can be deformed by an external force. For example, the packing 40 is made of a polyolefin resin such as polyethylene or polypropylene.

  A first rib 41 erected from the upper surface of the packing 40 is provided at an inner position separated from the peripheral end of the packing 40. The first rib 41 is continuously formed in an annular shape over the entire circumference of the packing 40. In addition, a second rib 42 that stands from the upper surface of the packing 40 is provided at the position of the peripheral end of the packing 40. That is, the first rib 41 is provided inside the second rib 42. The second rib 42 is also continuously formed in an annular shape over the entire circumference of the packing 40. The first rib 41 and the second rib 42 are in concentric positions. In the open state, the upper end position of the first rib 41 coincides with the upper position of the second rib 42.

  Further, a cylindrical fitting portion 43 having a fitting structure with the fitting portion 36 formed on the lid 30 described above is provided at a position near the center of the packing 40. The cylindrical fitting portion 43 is in a position concentric with the first rib 41 and the second rib described above.

  FIG. 3 shows an enlarged cross-sectional view of the main part of the lid 30 in the opened state. In a state before closing the lid 30, the second rib 42 in the packing 40 is separated from the lower surface 33 a of the top plate 33 of the lid 30 and the peripheral wall 31. Further, the first rib 41 is separated from the lower surface 33 a of the top plate 33. As can be seen from the figure, a stepped portion is provided by a projecting portion 37 that hangs downward at a position facing the first rib 41 on the lower surface 33 a of the top plate 33 of the lid 30. In the present embodiment, since the step portion is provided on the lower surface 33a of the top plate 33 formed integrally with the lid body, the number of parts is reduced and assembly is facilitated.

  4A and 4B show a process of closing the lid 30. FIG. When the lid 30 is screwed into the opening 21 of the container body 20, the lower end 44 of the peripheral end of the packing 40 and the upper end surface of the opening 21 come into contact with each other, and the upward force is applied to the lower end 44. Will be added. By this force, the peripheral end portion of the packing 40 and the vicinity thereof are elastically deformed and pushed upward. Accordingly, the first rib 41 and the second rib 42 of the packing 40 are pushed upward. By the way, as described above, in the opened state, the upper end position of the first rib 41 and the upper position of the second rib 42 coincide with each other, so that the first rib 41 and the second rib 42 are In the process of being pushed upward, first, as shown in FIG. 4A, the first rib 41 comes into contact with the step portion formed by the projecting portion 37 that hangs down. In this state, the second rib 42 is separated from the lower surface 33 a of the top plate 33 of the lid body 30 and the peripheral wall 33.

  When the screwing further proceeds from the state shown in FIG. 4A, further force is applied to the lower end 44 of the peripheral end portion of the packing 40, and the peripheral end portion of the packing 40 and the vicinity thereof are further elastically deformed and moved upward. Pushed up. In this state, that is, in a state where the first rib 41 is in contact with the convex portion 37 of the lower surface 33a of the top plate 33 of the lid 30, the upward push of the first rib 41 of the packing 40 is the lid body. 30, the contact portion between the first rib 41 and the projection 37 acts as a fulcrum of the insulator, and the lower end 44 of the peripheral end of the packing 40 and the opening 21 of the container body 20. The upper end surface of the plate is in close contact with the upper end. Thereby, the airtightness in the container is ensured.

  Even in the closed state shown in FIG. 4A, the airtightness in the container is sufficiently maintained. However, when the container is dropped or an external force such as vibration is applied to the container, the peripheral edge of the packing 40 There is a possibility that the position of the lower end 44 and the upper end surface of the opening 21 of the container body 20 are displaced, and the airtightness is lowered. Therefore, in this embodiment, the screwing further proceeds from the state shown in FIG. 4A, and the closed state shown in FIG. 4B, that is, the alignment between the container body 20 and the lid body 30 is completed. In the state, the second rib 42 contacts the lower surface 33a of the top plate 33 of the lid 30 or the inner surface of the peripheral wall 31 of the lid 30 (in the figure, the second rib 42 is the lid Abuts both of the lower surface 33a of the top plate 33 of the body 30 and the inner surface of the peripheral wall 31 of the lid 30). By completing the lid in the state shown in FIG. 4B, the position of the second rib 42 is fixed. As a result, the lower end 44, which is a portion located on the opposite side of the second rib 42, and the upper end surface of the opening 21 of the container body 20 are stably in contact with each other, and even if an external force is applied to the container, Misalignment is unlikely to occur and airtightness is ensured.

  FIG. 5 shows another example of the embodiment shown in FIGS. In the embodiment shown in FIGS. 1 to 4, a stepped portion made of a convex portion 37 is provided on the lower surface 33 a of the top plate 33 of the lid 30. This convex portion is formed integrally with the lid body 30. That is, the stepped portion formed of the convex portion 37 is formed integrally with the lid 30. Instead of this, in the embodiment shown in FIG. 5, a rib support 38 formed separately from the lid 30 is provided on the lower surface 33 a at a position facing the first rib 41 on the lower surface of the flat top plate 33. A stepped portion is formed by mounting so as to protrude from the head. Also in the present embodiment, as in the embodiment shown in FIGS. 1 to 4, high airtightness can be obtained even with low torque tightening. In addition, since the rib support 38 is separated from the lid, the tightening force can be adjusted by selecting a material having different elasticity even when the material of the packing 40 is limited due to the contents, etc. It is possible to easily achieve both improvement in performance and reduction in tightening force. Further, since the width of the stepped portion is sufficiently wider than the first rib 41, the stepped portion and the rib 41 can be reliably brought into contact with each other regardless of variations in the quality of the molded product.

  6 and 7 show another embodiment of the present invention. With respect to these embodiments, for the points that are not particularly described, the description regarding the previous embodiments is appropriately applied. 6 and 7, the same members as those in FIGS. 1 to 5 are denoted by the same reference numerals.

  FIG. 6 is an enlarged cross-sectional view of the main part of the lid 30 in the opened state. In a state before closing the lid 30, the second rib 42 in the packing 40 is separated from the lower surface 33 a of the top plate 33 of the lid 30 and the peripheral wall 33. The first rib 41 is separated from the lower surface 33 a of the top plate 33. Further, the upper end of the first rib 41 is located above the upper end of the second rib. Further, as is clear from the figure, the lower surface 33a of the top plate 33 of the lid 30 is flat and substantially coincides with the horizontal plane.

  FIGS. 7A and 7B show a process of closing the lid 30 shown in FIG. When the lid 30 is screwed into the opening 21 of the container body 20, an upward force is applied to the lower end 44 of the peripheral end of the packing 40, and this force causes the peripheral end of the packing 40 and the vicinity thereof. The part is elastically deformed and pushed upward. Thereby, the first rib 41 and the second rib 42 of the packing 40 are pushed upward. Incidentally, as described above, in the open state, the upper end of the first rib 41 is located above the upper end of the second rib 42, and the lower surface 33a of the top plate 33 of the lid 30 is substantially horizontal. Therefore, in the process in which the first rib 41 and the second rib 42 are pushed upward, first, the first rib 41 is attached to the lower surface of the top plate 33 as shown in FIG. 33a abuts. In this state, the second rib 42 is separated from the lower surface 33 a of the top plate 33 of the lid body 30 and the peripheral wall 33.

  When the screwing further proceeds from the state shown in FIG. 7A, the peripheral end portion of the packing 40 and the vicinity thereof are further elastically deformed and pushed upward. In this case, the upward pushing of the first rib 41 of the packing 40 is restricted by the lower surface 33 a of the top plate 33. As a result, the contact portion between the first rib 41 and the lower surface 33a of the top plate 33 acts as a fulcrum of the insulator, and the lower end 44 of the peripheral end portion of the packing 40 and the upper end surface of the opening portion 21 of the container body 20 are connected. Strong contact. Thereby, the airtightness in the container is ensured. Further, the torque at the time of closing and opening the lid, in particular, the alignment between the container main body 20 and the lid 30 does not become excessive.

  Further, the screwing further proceeds, and in the closed state shown in FIG. 7B, the second rib 42 contacts the lower surface 33 a of the top plate 33 of the lid 30 or the inner surface of the peripheral wall 31 of the lid 30. (In the figure, the second rib 42 is in contact with both the lower surface 33a of the top plate 33 of the lid 30 and the inner surface of the peripheral wall 31 of the lid 30). When the lid is completed in the state shown in FIG. 7B, the position of the second rib 42 is fixed. As a result, the lower end 44, which is a portion located on the opposite side of the second rib 42, and the upper end surface of the opening 21 of the container body 20 are stably in contact with each other, and even if an external force is applied to the container, Misalignment is less likely to occur and airtightness is ensured.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in each of the embodiments described above, the second rib 42 comes into contact with both the lower surface 33a of the top plate 33 of the lid 30 and the inner surface of the peripheral wall 31 of the lid 30 when the lid is completed. However, instead of this, the second rib 42 may be brought into contact with only one of the lower surface 33 a of the top plate 33 of the lid 30 and the inner surface of the peripheral wall 31 of the lid 30.

  In each of the above-described embodiments, both the first rib 41 and the second rib 42 are separated from the lower surface 33a of the top plate 33 of the lid 30 in the opened state. With respect to, the lid may be in contact with the lower surface of the top plate 33 in the open state within a range where the opening / closing torque of the lid does not become excessively high.

  Further, in each of the above-described embodiments, the first rib 41 and the second rib 42 are continuously formed over the entire circumference of the packing 40. Instead, both of these ribs or one of the ribs is used. May be formed discontinuously.

  Further, it goes without saying that the shape and structure of the container are not limited to those shown in the embodiments. For example, the shape of the container body may be a columnar shape instead of a prismatic shape. Further, the outer body and the inner body may be integrally molded without being separated.

It is a disassembled perspective view which shows the container of one Embodiment of this invention. It is a longitudinal cross-sectional view in the closed state of the container shown in FIG. It is sectional drawing which expands and shows the principal part of the cover body in an open state. It is sectional drawing which expands and shows the principal part of the cover body in a lid closing process. It is sectional drawing (FIG. 4 equivalent view) which expands and shows the principal part of the cover body in the closed completion state in another embodiment of this invention. It is sectional drawing (FIG. 3 equivalent view) which expands and shows the principal part of the cover body in the open state in another embodiment of this invention. It is sectional drawing (FIG. 4 equivalent view) which expands and shows the principal part of the cover body in the lid closing process in another embodiment of this invention. It is sectional drawing which expands and shows the principal part of the cover body in the closed state in the conventional container.

Explanation of symbols

10 Container 20 Container body 30 Lid 40 Packing

Claims (6)

A container body having an opening; a lid that covers the opening; and a plate-like packing attached to the lower surface of the top plate of the lid, and the peripheral end of the packing is open when the lid is closed A container in close contact with the upper end surface of the part,
A first rib and a second rib standing from the upper surface of the packing are respectively provided at a position inward from the peripheral end of the packing and at a position of the peripheral end, and the second rib is a lid in the opened state. In the closing process, the first rib is in contact with the lower surface of the top plate of the lid body, and the second rib is on the lower surface of the top plate of the lid body or the inner surface of the peripheral wall of the lid body. Container configured to abut. A step that hangs downward at a position that matches the upper end position of the first rib in the opened state and the upper end position of the second rib and faces the first rib 41 on the lower surface of the top plate of the lid. The container of Claim 1 which provided the part.   The container according to claim 2, wherein the step portion is formed integrally with the lid, or is formed by attaching another member to the lower surface of the top plate of the lid.   The container according to claim 1, wherein the upper end of the first rib in the opened state is positioned above the upper end of the second rib.   The container according to any one of claims 1 to 4, wherein the first rib and the second rib are formed continuously or discontinuously over the entire circumference of the packing.   The container according to any one of claims 1 to 5, further comprising a positioning mechanism for closing the lid body at a fixed position with respect to the container body.

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