JP2007145342A - Thermal insulation holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plastic thermal insulation holder showing a superior storing characteristic that can be easily assembled, that does not produce any steps at its right and left end portions when plastic thermal insulation holders overlap each other for their assembly and that can assure a thermal insulation characteristic at their overlapping portions. <P>SOLUTION: This is a band-like arcuate-shaped thermal insulation holder 1 that is wound around the outer peripheral wall of truncated cone shaped container. This thermal insulation holder has two connecting portions 20, 30 made of thermoplastic resin, positioned at both ends of arcuate-shaped holder that be connected to each other, and a main body 10 held between the connecting portions 20, 30. The entire surface of the main body 10 is provided with many thermal insulation protrusions 11. One of the connecting portions 20, 30 is provided with a connecting protrusion 31 and the other of the connecting portions 20, 30 is provided with a hole 21 fitted to the connecting protrusion 31. The extremity end of the connecting protrusion 31 is provided with an engaging protrusion 32. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat insulating holder for attaching to an outer peripheral wall of a frustoconical container for storing over-the-counter coffee or the like, and more specifically, heat insulation that can be easily attached to a container despite being made of a thermoplastic resin. Regarding the holder.

  The outer wall of containers that are not insulated, such as paper cups containing hot liquids such as hot coffee and soup that are often sold at over-the-counter sales, may be too hot for fingers at temperatures suitable for eating and drinking. It's difficult to keep on while eating. Therefore, a heat insulating sheet mounting container has been proposed in which a heat insulating sheet made of corrugated cardboard or plastic is fixed to the outer peripheral wall of the container in advance (see, for example, Patent Documents 1 to 4). However, such a container has a drawback in that it is difficult to handle because the stacked containers are bulky and have a high stacking height before being transported or used.

Therefore, separately from the container, a detachable mainly cardboard heat insulating holder is prepared, the container is stacked as a container, the heat insulating holder is stacked as a heat insulating holder, and the heat insulating holder is assembled into a three-dimensional structure before being used in the container. In addition, inventions that solve the above-mentioned drawbacks are also disclosed (for example, see Patent Documents 5 to 8). However, since corrugated cardboard is used, there has been a problem that a step is formed in the overlapped portion when assembling into a cylindrical shape, which causes a catch or a difficulty in holding.
Japanese Utility Model Publication No. 6-1274 Japanese Utility Model Publication No. 6-22212 Japanese Utility Model Publication No. 4-45215 JP 2001-80625 A JP 2004-168345 A JP 2002-68328 A JP-A-11-171263 Japanese Patent Laid-Open No. 9-154697

  The present invention provides a plastic heat-insulating holder that can be easily assembled with excellent storage properties, does not cause a step in the left and right end portions to be overlapped for assembly, and preferably ensures heat insulation of the overlapped portions. The purpose is to provide.

  The present invention is a belt-shaped and arc-shaped heat insulating holder for winding on the outer peripheral wall of a frustoconical container, which is made of thermoplastic resin and is located at both ends of the arc-shaped container and is connected to each other. And a main body portion sandwiched between the connection portions, and a large number of heat insulation convex portions are provided on the entire surface of the main body portion, and one or more connection convex portions are provided on one of the connection portions. However, the other is provided with one or more holes that fit into the connecting convex portion, and further, a locking convex portion is provided at the tip of the connecting convex portion. Heat insulation holder. Here, it is preferable to have been obtained by thermoforming a thermoplastic resin sheet. Moreover, it is preferable that Haze is 10% or less.

  It has excellent storage properties that can be stacked during transportation, etc., it is easy to assemble during use and difficult to come off, and there are no steps on the left and right edges that are overlapped during assembly, causing problems such as catching Does not occur. Moreover, since the heat insulation of the overlapped part is ensured, the surface having a high temperature does not touch the fingers, and it is excellent in all of storage properties, handling properties, and uniform heat insulation. Furthermore, it is easy to manufacture.

  Embodiments of the present invention will be specifically described below with reference to the drawings. First, the heat insulating holder is made of a thermoplastic resin. By using a thermoplastic resin, it can be easily molded into the shape necessary for heat insulation and connection, and if necessary, the heat insulation holder can be made transparent, light-shielding, or colored. It becomes. Examples of thermoplastic resins that can be used include resins that can be thermoformed such as polyolefin resins, polyester resins, polystyrene resins, polylactic acid resins, and polyamide resins. Among them, from the viewpoint of heat resistance, polyolefin resins can be used. Polypropylene is preferably a polyester resin polyethylene terephthalate from the viewpoint of transparency, and a polylactic acid resin is preferably used from the viewpoint of environment.

When polypropylene is used as the thermoplastic resin, either a homopolymer or a copolymer may be used, but it is preferable to use a homopolymer that is inexpensive and has high heat resistance. When transparency is required, a random polymer can be used. Moreover, when using a polyethylene terephthalate, the resin for A-PET is preferable from the point of high transparency. Here, the resin for A-PET has a large molecular weight among the PET resins, and the IV value (Intrinsic Viscosty, intrinsic viscosity) measured by JIS K7390 is as large as 4.0 to 17.0 cm ³ / g. This refers to a PET resin with a slow conversion rate. Moreover, when using a polylactic acid resin, it is preferable to use the polylactic acid resin from which a D body is 10% or less and which has crystallinity from a viewpoint of moldability and rigidity.

  FIG. 1 is a (1) front view and (2) perspective view of an example of a heat insulating holder of the present invention. In order to be able to use the entire heat insulating holder 1 by winding it around the outer peripheral wall of a frustoconical container, it is a belt-like arc shape, that is, a shape in which the side surface of the frustoconical shape is developed or a horizontally long rectangle is arcuate. It has a distorted shape. At both ends of the arcuate shape of the heat-insulating holder 1, connection portions 20 and 30 are provided for making a three-dimensional shape by rounding around the container, and the main body portion 10 is provided therebetween. The heat insulating holder 1 is rounded and the connecting portions 20 and 30 are overlapped and connected to each other, so that the heat insulating holder 1 is fitted into the outer peripheral wall of the container.

  The lateral width of the heat insulating holder 1 may be appropriately determined according to the size of the container. Also, the height of the heat insulating holder is preferably 20 mm or more so that fingers do not touch the outer peripheral wall of the container, and is unstable when the container is placed on a table or the like with the heat insulating holder 1 attached. In order not to become, it is good to make it below the height of the container. The overall shape of the heat insulating holder may be appropriately determined in width, height, taper, etc. so as to satisfy these conditions.

  A large number of heat-insulating convex portions 11 are provided on the entire surface of the main body portion 10 of the heat-insulating holder 1. These convex portions 11 are provided to ensure a certain space between the container and the fingers so that the fingers do not touch the outer peripheral wall of the container when the container is held by fingers. This makes it difficult for heat to be transmitted to the fingers. Accordingly, the shape, height, width, position, number, interval, and the like of the protrusions 11 may be appropriately determined so that such a function can be exhibited. The height of the convex portion is preferably 1 mm or more, more preferably 2 mm or more from the viewpoint of heat insulation performance. There is no limit to the upper limit of the height of the convex part, but it is acceptable at a height that is easy to hold by hand when locked to a container as a heat insulating holder. By the way, in the example of the heat insulation holder 1, the shape of each convex part shows what the short side of a rectangle is a circular arc, but it does not need to restrict to this, and a rectangle, a circle, an ellipse, a triangle, etc. It can be of any shape.

  A connecting convex portion 31 is provided on the connecting portion 30 of the heat insulating holder 1. Further, the connecting portion 40 on the opposite side is provided with a hole 21 that fits the connecting convex portion 31 when the heat insulating holder 1 is rolled and the connecting portions 20 and 30 are overlapped. By fitting the connecting convex portion 31 into the hole 21, the heat insulating holder 1 has a three-dimensional shape that matches the outer peripheral wall of the container. Further, the connecting convex portion 32 is not only for creating such a connection state, but also in the connection portions 20 and 30 after the connection, when holding the container with fingers, a space is formed between the fingers and the outer peripheral wall of the container. And has a function of preventing the heat from being easily transferred. Accordingly, the shape, position, height, and number of the connecting convex portions 32 may be determined as appropriate so that such a function can be performed.

  Further, a locking convex portion 32 is provided at the tip of the connecting convex portion 32 so that the hole 21 is caught and the fitting structure between the connecting portions is difficult to come off. FIG. 2A shows a cross-sectional view of the cross-section of the broken line 33 crossing the connecting portion 30 as viewed in the direction of arrow A. It can be seen that locking convex portions 32 are provided on the left and right of the upper portion of the connecting convex portion 31 of the connecting portion 30. Further, FIG. 2B shows a cross-sectional view of the cross-section of the broken line 22 crossing the other connecting portion 20 of the heat insulating holder 1 in the arrow B direction. Then, FIG. 2C shows a cross-sectional view of the connection portion in a state where the heat insulating holder 1 is rolled up, both the connection portions are overlapped, and the connection convex portion 31 is fitted in the hole 21.

  The locking convex portion 32 functions as a resistance for preventing the connecting convex portion 31 from coming off from the hole 21 in a state where the connecting convex portion 31 is fitted in the hole 21. For this reason, once a connection state is created, the connection state is unlikely to be disconnected. By providing such a locking projection 32, the connection state can be surprisingly stably maintained even when a thermoplastic resin sheet having a lower strength than that of cardboard is used. The trouble that the holder comes off is less likely to occur. The shape, position, height, and number of the projections for locking may be appropriately determined so that this function can be performed.

  In each drawing of FIG. 2, the outer peripheral wall of the container may be positioned on the lower side or the upper side of the heat insulating holder 1 toward the drawing. It is preferable that the outer peripheral wall of the container is located on the lower side of each figure so that the end portion of the container is not easily caught. As a result, the end portion 33 of the connecting portion 20 is buried in the space formed by the heat insulating convex portion 11 and the connecting convex portion 31, and it is difficult for unnecessary catching to occur.

  Next, another example of the heat insulating holder is shown in FIG. FIG. 3 (1) is an example of the heat insulating holder 2 having three connection convex portions in the connection portion 60. Each of the three connecting convex portions 61 to 63 is provided with locking convex portions 65 to 67. Further, the connection portion 50 is provided with three holes 51 to 53 corresponding to the connection convex portions. FIG. 4 is a diagram showing still another example of the heat insulating holder. FIG. 4 (1) shows an example of the heat insulating holder 3 having two connecting projections, and FIG. 4 (2) shows two connecting projections 90 and 91. The example of the heat insulation holder 4 inclined and arranged so as to have is shown. By providing an angle in this way, it becomes stronger against the force to release the connection state, and it becomes more difficult to come off.

  The heat insulating holder preferably has a Haze of 10% or less. Thereby, even when the heat insulating holder is attached, the pattern of the container can be visually recognized from the outside, and a clean feeling can be obtained. In order to make the heat insulation holder have a Haze of 10% or less, conditions may be selected as appropriate by combining thermoplastic resins and thermoforming methods by known means. For example, A-PET polyethylene terephthalate may be used as the thermoplastic resin.

  Next, a method for manufacturing such a heat insulating holder will be described. First, a resin to be used is selected from the above-described thermoplastic resins, and this is formed into a sheet by a known thermoforming method, for example, extrusion molding using a T die or press molding. At this time, a light-shielding agent, a colorant, an ultraviolet absorber and the like may be added to the thermoplastic resin. The thickness of the molded resin sheet varies depending on the thermoplastic resin, but is preferably 0.05 mm to 3.00 mm, more preferably 0.10 mm to 2 from the viewpoint of moldability for forming the convex portion. 0.00 mm. Subsequently, using this resin sheet, a convex portion is formed by a known thermoforming method, for example, vacuum forming, pressure forming, vacuum pressure forming, injection molding, etc., and then cut from the sheet to achieve the desired heat insulation. A holder is obtained.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to the specific aspect of an Example. Haze was measured in accordance with JIS K7136 using a sheet before molding.

  As a thermoplastic resin sheet, a 0.20 mm thick polypropylene sheet (6T (N), manufactured by Seadam Co., Ltd.) is used, and a heat insulating convex portion, a connecting convex portion, and a locking convex portion are formed with a single pressure pneumatic molding machine. After the formation, a hole was formed with a Thomson blade, and a hole was cut into a circular arc shape to obtain a heat insulating holder similar to the heat insulating holder 1 shown in FIG. This heat insulating holder has a maximum lateral width of 23.5 cm and a length in the container height direction of 8.5 cm so that it can be set in a truncated cone container having a diameter of about 78 mm, a bottom diameter of about 51 mm, and a height of about 110 mm. The taper was set according to the container. Moreover, the height from the container outer peripheral surface of the convex part for heat insulation was 3 mm, the width was 5 mm, the width between the convex part and the convex part was 3 mm, and it was designed so that fingers do not touch the surface of the outer peripheral wall of the container. .

  Moreover, the shape of the convex part for a connection of a connection part is made into the shape as described in FIG.1 and FIG.2, 3 mm in height from a container outer peripheral surface, 10 mm in width, the edge of a heat insulation holder (FIG. 2 (1)) The distance from 33) to the connecting projection was 4 mm. A locking convex portion as described in 2 (1) was provided on the upper outer peripheral surface of the connecting convex portion. The protrusion height of the locking convex portion from the upper outer peripheral surface was 0.8 mm. When the Haze of this heat insulating holder was measured, it was a good value of 6%.

  Using this heat insulating holder, it was wound around a truncated cone-shaped container, and the connecting portions were overlapped and fitted and connected. There was no lifting of the edges, the appearance was good, and the fingers did not touch the container body over the entire circumference of the outer peripheral wall of the container. When coffee with a temperature of about 60 ° C. was poured into the container volume up to 80% of the container volume and held with fingers, there was no part that felt particularly hot, and uniform insulation performance was obtained.

It is (1) front view and (2) perspective view which showed the example of the heat insulation holder. (1) A cross-sectional view of the cross-section of the broken line 33 as viewed in the A direction, (2) a cross-sectional view of the cross-section of the broken line 22 as viewed in the B direction, (3) A cross-sectional view of the state where (1) and (2) are connected It is. It is the figure which showed the other example of the heat insulation holder. It is the figure which showed the further another example of the heat insulation holder.

Explanation of symbols

1-4 Insulation holder 10, 40 Main body 20, 30, 50, 60 Connection 11 Insulation convex 21, 51-53, 80, 100 Hole 22, 33 Broken lines 23, 33 indicating cross-sectional positions Ends 31, 61 ~ 63, 70 ~ 71, 90 ~ 91 Connection convex part 32, 65 ~ 67, 72 ~ 73, 92 ~ 93 Locking convex part

Claims (3)

  A band-shaped arc-shaped heat insulating holder for winding on the outer peripheral wall of the frustoconical container, which is made of a thermoplastic resin, is located at both ends of the arc-shaped shape and can be connected to each other, and the connection section A plurality of heat-insulating convex portions on the entire surface of the main body portion, and one or more connecting convex portions on one side of the connecting portion and the other on the other side. Is provided with one or more holes that fit into the connecting convex portion, and further, a locking convex portion is provided at the tip of the connecting convex portion.   The heat insulation holder according to claim 1, wherein the heat insulation holder is obtained by thermoforming a thermoplastic resin sheet. Haze is 10% or less, The heat insulation holder of Claim 1 or 2 characterized by the above-mentioned.

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