JP2011178407A - Closing structure for container lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closing structure for container lid for engaging and connecting lid plates and holding the closed state of the lids, the structure being configured such that engaging/disengaging of an engaging projection and engaging hole is facilitated, the engaging projection being inserted and fitted into the engaging hole without bending the engaging projection, and their engaged and connected state being satisfactorily held. <P>SOLUTION: The container having the lid plates 4a and 4b connected to the open edges of the opposite sides of a container body includes engaging means formed from the engaging projection 5 projecting from the edge 41a of the one lid plate 4a, and an engaging hole 6 formed in the edge 41b of the other lid plate 4b. The engaging projection 5 is formed such that the base part has a narrow portion 52 the breadth of which is less than that of a front end side 51. The engaging projection is deformable in a curved shape in a widthwise direction. The engaging hole 5 is formed such that the engaging projection can be inserted into the hole up to the narrow portion 52 in the direction of the lid plate while the engaging projection 5 is deformed in the curved shape in its widthwise direction. The engaging hole 5 is shaped such that the front end side 51 of the engaging projection is returned into its original shape, and the front end side is thereby locked on both side edges of the engaging hole. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure for closing a lid of a container formed by a sheet material having elasticity.

  Conventionally, shipping containers for various agricultural products such as vegetables, fruits, root vegetables, mushrooms, etc., as well as containers made of synthetic resin foam with heat insulation and buffering properties, as containers for transportation and other various goods. A container formed from a synthetic resin foam sheet is known. In particular, when used as an intermediate container, a container made of a synthetic resin foam sheet is often used. As a container made of a synthetic resin foam sheet, there is also a container in which four side wall plates are connected to a bottom portion so as to be able to be bent upright.

  The container made of the synthetic resin foam sheet is usually provided with a cover plate that closes the opening at the top of the container in order to ensure heat insulation and protect the contents. In recent years, there is a problem that handling up to use becomes troublesome and the adherence state becomes unstable. A flap-like lid plate is connected via the cover, and the lid plate covers the opening of the container and holds the lid in a closed state.

  In this case, in order to hold the lid plate in a closed state, the end portions of both lid plates are abutted at the center of the opening portion and closed with an adhesive tape. However, it is necessary to use an adhesive tape. In addition, it is troublesome to operate, and when opening the cover plate to check the contents during transportation, it is necessary to peel off the adhesive tape. There was a problem such as.

  For this reason, it is desired that the end portions of the two lid plates that are brought into contact with each other can be reliably closed by means that can be engaged and disengaged without using an adhesive tape, and that a closing structure that facilitates the engagement and disengagement is provided.

  For example, in an assembly type cardboard box, in order to hold the outer flap for the lid in the closed state, engagement pieces whose base portions are constricted are protruded from both ends of the outer edge of the outer flap. When the cardboard box is assembled and the inner and outer flaps for the lid are closed, the engagement piece is bent at a substantially right angle and inserted into the cut portion formed at the base of the inner flap so as to be closed. Has been proposed (Patent Document 1).

  In this case, in order to lock the engaging piece, it is necessary to bend the base at a substantially right angle, and there is a possibility that the base of the engaging piece serving as the bent portion may be broken or broken due to repeated folding. In particular, in the case of a synthetic resin foam sheet, depending on the material, breakage is likely to occur due to bending.

Registered Utility Model No. 3052134

  The present invention has been made in view of the above, and in a container made of a sheet material, a lid for engaging and connecting lid plates connected to face each other at an opening edge to keep the lid closed. As the closing structure of the lid, it is easy to engage and disengage with the engaging piece and the engaging hole, can be engaged without bending the engaging piece, and the lid can be stably and securely held in the closed state. Provide structure.

  The present invention that solves the above-mentioned problems is a flap shape that is formed of an elastic sheet material and that can be closed at the opening edges of opposite sides of a container body having a rectangular opening via hinges, respectively. The lid of the container is formed by connecting a plurality of lids, and is provided at the edge of one of the lids at the edge of the two lids that are abutted on the opening when the lid is closed. Engagement means comprising an engagement piece and an engagement hole formed at the edge of the other lid plate, the engagement piece being narrower at the base side than the tip side portion. The engagement hole can be deformed in a curved shape in the width direction, and the engagement hole extends to the constricted portion in the cover plate surface direction in a state where the engagement piece is curved in the width direction. It opens so that it can be inserted, and the tip side part of the engagement piece is restored to its original shape. Characterized in that it forms a opening shape can be locked on both ends by the.

  According to the lid closing structure of the present invention, when the edges of both lid plates are brought into contact with each other and the opening is held in the closed state, the engagement pieces projecting from the edge of one lid plate are arranged in the width direction. , The width of the front end side portion of the engagement piece is the same as or slightly smaller than the opening width of the engagement hole 6, so that the front end side portion of the engagement piece becomes the engagement hole. It can be easily pushed in without bending, and can be inserted without difficulty up to the position of the constriction. Thus, when the engagement piece is restored to the original flat plate shape with the constricted portion of the engagement piece fitted, the front end side portion of the engagement piece is locked to both side ends of the engagement hole. Withdrawal is prevented, both lid plates are engaged and connected, and are held closed.

  In the closure structure of the lid of the container, the engagement hole has an opening width in a direction along the edge of the lid plate that is smaller than the maximum width of the front end side portion of the engagement piece and greater than or equal to the width of the constricted portion. And the maximum width in the direction orthogonal to the opening width is formed to be larger than the bending height in a state where the tip side portion of the engagement piece is deformed into a curved shape having a width smaller than the opening width. Thus, the engaging piece can be inserted into and removed from the engaging hole by deforming the engaging piece into a curved shape as described above, and the engaging / disengaging operation can be easily performed.

  In the lid closing structure of the container, a bulging portion that protrudes on the surface side when the lid is closed is provided in the vicinity of the edge of the lid plate, and the engagement hole is a lid on the side surface of the edge of the bulging portion. It is assumed that the opening is provided in the plate surface direction. Thereby, the said engagement piece can be inserted and engaged in an engagement hole, without bending at the constriction part of the base.

  Further, in a part of the edge portion of the lid plate, the surface side when the lid is closed is recessed, and the engagement hole is provided at the inner end surface of the recessed portion so as to open in the direction of the lid plate surface. Can be. In this case, it is preferable that at least the bottom side width of the recessed portion is formed smaller than the opening width of the engagement hole. Accordingly, for example, by placing the engaging piece on the recessed portion and pressing it with a finger from above, the engaging piece can be easily deformed into a curved shape. In addition, the vertical width perpendicular to the opening width direction of the engagement hole can be set to be equal to or greater than the bending height of the engagement piece.

  In the container lid closing structure, the two lid plates are connected to the opening edge portions of the upper ends of the opposite side walls of the container body. In this case, the both side walls may be side walls formed integrally with the bottom portion, or side walls assembled by bending up with respect to the bottom portion.

  According to the container lid closing structure of the present invention, the engagement piece is used as the lid closing structure for engaging and connecting the lid plates connected to each other opposite to the opening edge to keep the lid closed. Engagement and disengagement operation with the engagement hole is easy, and it is possible to engage and disengage without bending the engagement pieces, and in the engaged state, both lid plates can be stably and securely held in the closed state. .

It is the perspective view which notched a part of container which shows one Example of this invention. It is a top view of the state which expand | deployed the cover plate of the container same as the above. It is sectional drawing in the AA line of FIG. 2 of the state which bent the cover plate of the container same as the above in the closing direction. It is an expansion perspective view before engagement of the part of the engagement means which closes a cover plate same as the above. They are a partial enlarged plan view (a) same as the above, and sectional drawing (b) of the BB line. It is a front view by the side of an engagement hole same as the above. It is a top view of the engagement state same as the above. It is sectional drawing same as the above. It is a perspective view which shows the Example in the container of another form.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  The container 1 of the Example shown in FIGS. 1-8 is a flat rectangular container, such as a flat rectangle used for various agricultural products, for example, and has elasticity which has a shape retention property and can be bent and deformed. A sheet material, for example, a synthetic resin sheet material, more preferably a synthetic resin foam sheet, is integrally formed in a developed state.

  In the case of the container 1 of the embodiment, the flanges that are the opening edges 31 on opposite sides of the container main body 3 formed into a container shape having a rectangular opening 2 on the upper surface, particularly the upper ends of the opposite side walls 32 and 32. Flap-shaped cover plates 4a and 4b capable of closing the opening 2 are connected to the opening edge 31 of the shape in a bendable manner via hinges 33 and 33, respectively. In the case of the container 1 shown in the figure, the hinge portions 33, 33 are combined with, for example, two V-grooves so that the cover plates 4a, 4b in the unfolded state (FIG. 2) can be bent toward the opening 2 side. And can be bent 180 degrees.

  The lid plates 4a and 4b are provided with engaging pieces 5 projecting from the edge 41a of one lid plate 4a at the edge portions 41a and 41b that are abutted at the opening 2 when the lid is closed. The engaging means 6 is provided with an engaging hole 6 formed in the edge 41b of the other cover plate 4b, and the engaging piece 5 is engaged by being inserted into the engaging hole 6. In the case of the figure, the edge portions 41a and 41b of the two cover plates 4a and 4b are formed in a phased shape, in particular an engagement in which the edge portions 42a and 42b of the required width have a step of about half the thickness of the sheet material, for example. It has a phase-out shape with the side having the piece 5 on the upper side, and both end edge portions 42a and 42b are abutted in a fitted state. The engaging piece 5 is provided so as to protrude from the end edge portion 42a with the same thickness as the end edge portion 42a. Of course, as described above, a part may be overlapped and abutted, or may be simply abutted.

  The engagement piece 5 constituting one of the engagement means has a constricted portion 52 narrower than the distal end portion 51 on the base side (the side of the base portion connected to the end edge portion 42a), for example, in the figure. Thus, it has a flat trapezoidal shape or a rounded mushroom shape (not shown). As shown in the figure, the distal end side portion 51 has a flat trapezoidal shape or a mushroom shape with a narrower width toward the distal end, so that it can be easily inserted into the engaging hole 6 and fitted. In the inserted state, it can be reliably locked to both side ends of the engagement hole 6. The shape of the distal end side portion 51 is not limited to the trapezoidal shape or the mushroom shape as long as the width is larger than the constricted portion 52 on the base side and can be locked to both side ends of the engagement hole 6. Implementation by shape is possible. In any case, the engagement piece 5 can be deformed into a curved shape in the width direction by utilizing the elasticity of the sheet material that is a constituent material, and by this deformation, the width (from the plane) of the distal end side portion 51 is made. It is formed so that it can be relatively easily reduced to the same level as the width of the constricted portion 52.

  The engagement hole 6 constituting the other of the engagement means can be inserted up to the constricted portion 52 in the cover plate surface direction (butting direction) in a state where the engagement piece 5 is deformed so as to be curved in the width direction. And the front end side portion 51 of the engagement piece 5 can be locked to both side ends of the engagement hole 6 by restoring the original shape (flat plate shape) in the inserted state. The opening shape is made.

  Further, the engagement hole 6 has a constricted portion of the engagement piece 5 in a butted state where both the lid plates 4a and 4b are fitted with the edge portions 42a and 42b of the edge portions 41a and 41b. As will be described later, the bulging portion 7 on the surface side is positioned slightly inward from the edge portion 42b of the edge portion 41b so that 52 is fitted and locked to both side ends of the engagement hole 6. Further, an opening is formed in the direction of the cover plate surface using the recessed portion 8. For example, as shown in the figure, when the both lid plates 4a and 4b are provided with bulging portions 7 such as reinforcing ribs that are convex on the front surface side when the lid is closed, the engagement hole 6 has the bulging portion. It is formed so as to open in the lid plate surface direction using the edge side surface of the protruding portion 7, and the engagement piece 5 is inserted and inserted in the lid plate surface direction without being bent at the base portion, It is provided so as to be kept engaged within the thickness of the portion 41b. As the bulging portion 7, a bulging shape as a reinforcing rib can be used, or a bulging portion only for forming the engagement hole 6 can be formed.

  In order to enable the engagement and engagement of the engagement piece 5 with the engagement hole 6, the engagement hole 6 opened in the cover plate surface direction as shown in an enlarged view in FIGS. 4 to 8. The opening width w1 in the direction along the end portion 41b of the lid plate 4b is smaller than the maximum width w3 of the distal end side portion 51 of the engagement piece 5 and more than the width w4 of the constricted portion 52, preferably the constriction. The maximum width w2 in the vertical direction (cover plate thickness direction) orthogonal to the opening width w1 is the same as the width w4 of the portion 52, and the distal end portion 51 of the engagement piece 5 is smaller than the opening width w1. From the bending height h in the state of being deformed into a curved shape of the width, that is, the bending height h from the line connecting the both ends of the distal end side portion 51 of the engagement piece 5 curved as shown by the chain line in FIG. Is formed so as to form a large opening. Thereby, the engagement piece 5 can be deformed into a curved shape and can be inserted into the engagement hole 6, and the engagement piece 5 is restored to its original shape in this insertion state, so that the constricted portion 52 is The both ends of the engagement hole 6 are fitted, the tip end portion 51 is engaged with both ends of the engagement hole 6, and both the lid plates 4, 4 are engaged and held closed. It has come to be.

  In the case of the figure, in order to make the engagement hole 6 have the opening shape, in the edge portion 41b of the cover plate 4b where the engagement hole 6 is formed, a part corresponding to the engagement hole 6 is A concave is formed on the front surface side when the lid is closed (a convex is formed on the rear surface side), and the inner side end surface 81 of the concave portion 8 is continuous with the edge-side surface of the bulging portion 7. In addition, the engagement hole 6 is formed at the location of the inner end face 81 so as to open in the cover plate surface direction so as to ensure the maximum width w2.

  As shown in the figure, the recessed portion 8 is formed so as to be substantially the same width as the opening width w1 of the engagement hole 6 and at least the width on the bottom surface side is smaller than the opening width w1 of the engagement hole 6. In addition, both side surfaces 82 and 82 are inclined surfaces. Accordingly, the engaging piece 5 can be easily deformed into a curved shape along the both side surfaces 82, 82 by pressing the engaging piece 5 from above the recessed portion 8. As long as the shape of the recessed portion 8 has the opening width w1 and the maximum width w2 in the direction perpendicular to the opening width w1, the bottom side can be formed in a curved shape.

  In particular, when the side surfaces 82 and 82 of the recessed portion 8 are formed so as to define the shape of both sides of the engagement hole 6 or from both ends to the lower end, the engagement piece 5 is formed into the recessed portion 8. By simply pressing, it can be deformed into a shape that can be inserted into the engagement hole 6, and the insertion operation is facilitated. Can be easily deformed into a shape along the line and can be easily removed.

  The engaging means by the engaging piece 5 and the engaging hole 6 is provided only at one central portion of the edge portions 41a and 41b of the lid plates 4a and 4b that are abutted at the opening 2 as shown in the figure. The arrangement position and the number of arrangements are not limited to those arranged in the longitudinal direction of the edge, and are appropriately set according to the size of the container. Can be implemented. As the number of arrangements increases, the engagement connection between the cover plates 4a and 4b becomes stronger.

  In addition, although the bottom face part 34 of the container main body 3 may be a simple flat plate, in the case of the embodiment shown in the figure, the convex part 35 that receives the stored goods such as agricultural products and the stored goods The concave-convex shape has a concave portion 36 that can store the generated water. The concave-convex shape can reinforce the bottom surface portion 34 and can prevent the stored item from being in contact with the water accumulated in the concave portion. It has become. The shape of the bottom surface portion 34 can be appropriately changed according to the type of the object to be stored.

  As a constituent material of the container 1 of the above-described embodiment, in addition to a non-foamed synthetic resin sheet and a foamed sheet, as long as it is a sheet material having an elasticity that can be elastically deformed by pressing the engagement piece 5 with a finger. Various types of sheet materials can be used, but in the case of the container 1 that requires heat insulation, a synthetic resin foam sheet is preferably used. Synthetic resin foam sheets are used with polystyrene resin, polyolefin resin such as polypropylene, polyethylene and cross-linked polypropylene resin, high density polyethylene resin, polyester resin, polyvinyl chloride resin and other moderate elasticity. Various thermoplastic synthetic resin foam sheets having the necessary shape-retaining strength can be used. From the viewpoint of shape retention and cost, a polystyrene resin foam sheet is preferably used.

  The thickness of the sheet material varies depending on the material used, but in the case of a foam sheet, the thickness is usually 1 mm or more, preferably 10 mm or less, and more preferably in the range of 1 to 6 mm. Used in consideration of strength and the like. For example, in the case of a polystyrene-based resin foam sheet, about 1 to 5 mm is preferable, and a foam sheet having an expansion ratio or density of about 5 to 15 times is preferably used.

  The engaging piece 5 formed integrally with the cover plate 4a may have the same thickness as the cover plate 4a, but is elastically deformed in a curved shape when fitted into the engagement hole 6. Therefore, it is preferable to set the thickness so as to maintain a predetermined strength and enable elastic deformation. For example, when it consists of a foam sheet, it is preferable to make it thinner than the thickness of the cover plate 4a by a means such as heating and pressing to a thickness of about ½. Even when a non-foamed sheet material is used, the engagement piece 5 has a thickness capable of being elastically deformed into a curved shape as described above.

  When the synthetic resin foam sheet is used as the raw material, the container body 3 and the cover plates 4a and 4b are formed in the unfolded state as described above by means such as vacuum forming using a mold, and the flap-shaped cover plate The engagement holes 6 and the engagement pieces 5 are formed at the same time during the punching process for the trimming 4a and 4b. The engagement piece 5 can also be formed by cutting out at the edge 4a.

  In the use of the container 1 of the above-described embodiment, the lid plates 4a and 4b of the opening edge portions 31 and 31 on opposite sides of the container body 3 are bent inward by the hinge portions 33 and 33, and the center of the opening 2 is formed. When holding the opening 2 in the closed state by butting the edges 41a, 41b of the two lid plates 4a, 4b at the portion, the position of the lid plates 4a, 4b in the closed state is utilized using the elasticity of the material. The engagement piece 5 projecting from the edge 41a of one cover plate 4a is moved to the edge 41b of the other cover plate 4b. The bending of the engaging piece 5 is performed by placing the engaging piece 5 on the front portion of the formed engaging hole 6 and pressing the portion of the engaging piece 5 with a finger from above to elastically deform it. Within the range of the maximum width w2 in the direction perpendicular to the opening width direction of the engagement hole 6, the width w3 of the distal end portion 51 of the engagement piece 5 is The opening width w1 of the engagement hole 6 is the same as or slightly smaller than the opening width w1, and the distal end portion 51 of the engagement piece 5 can be easily pushed into the engagement hole 6 without being bent. It can be inserted to the position without difficulty. Thus, when the constricted portion 52 portion of the engagement piece 5 is fitted, the engagement piece 5 is restored to the original flat plate shape, so that the distal end side portion 51 wider than the opening of the engagement hole 6 is formed. By being locked to both ends of the engagement hole 6, the removal is prevented, and both the lid plates 4a and 4b are engaged and connected to be held in a closed state (FIGS. 7 and 8).

  Further, when opening the cover plates 4a and 4b, as described above, the base portion of the engagement piece 5 is pressed with a finger at the recessed portion 8 and elastically deformed in a curved shape, as described above. Since the width w3 of the distal end portion 51 of the combined piece 5 is smaller than the opening width w1 of the engagement hole 6, the engagement piece 5 can be removed if the cover plates 4a and 4b are held apart as they are. It can be removed and the engaged state can be released.

  The form of the container 1 is not limited to that of the embodiment shown in FIGS. 1 to 8, and is implemented by various containers having a flap-shaped lid plate that closes the opening at the opening edge in a container formed from a sheet material. Is possible.

  For example, as shown in FIG. 9, the container body 3 is a box-shaped container formed of a sheet material such as a synthetic resin foam sheet, or a box-shaped container 1 that can be assembled into a cardboard box type. 2, when flap-like lid plates 4 a and 4 b that can close the opening 2 are connected to hinge portions 33 and 33, the lid plate 4 a and 4 b are closed. As mentioned above, it can be carried out by providing an engagement means by the engagement piece 5 and the engagement hole 6 similar to the above. In this embodiment, the same components as those in the above-described embodiment are denoted by the same reference numerals.

  In addition, as a container for agricultural products, in an intermediate container formed of a heat-insulating foam sheet used in combination with an outer box, a container having a cover plate that can close an upper opening is similar to the above. Can be implemented. In this case, the container body is connected to side walls that can stand up on each side of the flat bottom of the rectangular rectangular shape, and flap-shaped lids are formed at the opening edges of the opposite sides that are the upper ends of the opposite side walls. In addition, it is possible to carry out by providing engaging means using engaging pieces and engaging holes similar to those described above at the edges of both lid plates that are abutted at the opening.

  Furthermore, the present invention is not necessarily limited to the cover plate that closes the opening at the top of the container, but also includes a cover plate that closes the opening on the front and side surfaces of the container. As a closing structure to be held in the above, it can be carried out in the same manner as described above.

  DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Opening, 3 ... Container main body, 4a, 4b ... Side plate, 5 ... Engagement piece, 6 ... Engagement hole, 7 ... Expansion part, 8 ... Recessed part, 31 ... Opening edge part, 32 ... side wall, 33 ... hinge part, 34 ... bottom part, 35 ... convex part, 36 ... concave part, 41a, 41b ... edge part, 42a, 42b ... edge part, 51 ... tip side part, 52 ... constriction part, 81 ... Inner side end face, 82 ... inclined surface, w1 ... opening width of the engagement hole, w2 ... maximum width in the vertical direction of the engagement hole, w3 ... width of the tip side portion of the engagement piece, w4 ... constriction of the engagement piece The width of the part.

Claims (6)

A container formed by an elastic sheet material and connected to the opening edges of opposite sides of a container body having a rectangular opening via a flap-shaped lid plate that can close the opening via hinges. A lid closing structure,
Engagement pieces projecting from the edge of one lid plate at the edge portions of the two lid plates that are abutted on the opening when the lid is closed, and an engagement formed at the edge of the other lid plate An engagement means comprising a joint hole is provided,
The engaging piece has a shape having a constricted portion having a narrower width than the distal end portion on the base side, and can be deformed so as to be curved in the width direction. Is opened so that it can be inserted into the constricted portion in the direction of the cover plate in a state of being deformed in a curved shape in the width direction, and the front end side portion of the engagement piece is restored to the original shape, thereby engaging the both ends. A closing structure for a lid of a container, which has an opening shape that can be stopped.   The engagement hole has an opening width in a direction along the edge of the cover plate that is smaller than the maximum width of the distal end portion of the engagement piece and equal to or larger than the width of the constricted portion, and is perpendicular to the opening width. 2. The container according to claim 1, wherein a maximum width of the engagement piece is formed so as to form an opening larger than a bending height in a state where a distal end portion of the engagement piece is deformed into a curved shape having a width smaller than the opening width. Lid closing structure.   In the vicinity of the edge portion of the lid plate, a bulging portion that protrudes to the surface side when the lid is closed is provided, and the engagement hole is provided on the edge side surface of the bulging portion so as to open in the direction of the lid plate surface. The container lid closing structure according to claim 1 or 2, wherein the container lid is closed.   At the end portion of the lid plate where the engagement hole is formed, a part of the engagement hole is recessed so as to form a recess on the surface side when the lid is closed, and the inside of the recessed portion The closure structure of the container lid according to any one of claims 1 to 3, wherein the engagement hole is provided in a side end face so as to open in a direction of the lid plate surface.   The container lid closing structure according to claim 4, wherein a width of at least a bottom surface side of the recessed portion is formed to be smaller than an opening width of the engagement hole.   The container lid closing structure according to any one of claims 1 to 5, wherein the two lid plates are connected to opening edges at upper ends of opposite side walls of the container body.

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