JP2017127354A - Door for showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door for a showcase that facilitates production, does not cause rattling and includes a frame structure with high reliability, and has good heat insulating properties.SOLUTION: A door (door for a showcase) 1 includes a plate-like glass 90 and a frame body 50 disposed in the circumferential edge of the plate-like glass 90. The frame body 50 has a recess 61 including an inside holding surface (inner surface) 64F, an end surface facing surface (inner surface) 63F and an outside holding surface (inner surface) 62F, opposed to an area from an in-chamber side plate surface 90A (outer surface) of the plate-like glass 90 to an out-chamber side plate surface 90B (outer surface) across an end surface 90T (outer surface). A foam rubber seal material 10 including a plate surface contact part 11 coming into contact with the inside holding surface 64F of the recess 61 and the in-chamber side plate surface 90A of the plate-like glass 90, and an end surface contact part 12 coming into contact with the end surface facing surface 63F and the end surface 90T is disposed between the recess 61 and the plate-like glass 90.SELECTED DRAWING: Figure 4

Description

  The technique disclosed by this specification is related with the door for showcases.

  2. Description of the Related Art Conventionally, as a door for a showcase that displays food, beverages, etc. while refrigerated or frozen, a plate glass having a peripheral edge held by a frame has been widely used. For such a door for a showcase, for example, a structure as shown in Patent Document 1 below has been proposed. In the sash structure described in Patent Document 1, a frame member is configured by connecting a resin member arranged on the inner side of the door and a metal member arranged on the outer side of the cabinet when the door is attached to the showcase. By sandwiching the peripheral edge of the glass plate by the resin member and the metal member, the structural stability and the heat insulation are improved while suppressing the number of parts.

JP 2005-323830 A

  In the sash structure described above, an adhesive is provided in the first and second enclosed spaces formed between the resin member and the metal member in order to suppress the occurrence of rattling in the sandwiched portion of the glass plate due to deformation of the resin member. Is applied and sealed in advance, and the glass plate is fixed to the frame material. However, application of an adhesive for properly fixing the glass plate is a difficult task. That is, if the coating amount is too large, it may ooze on the front and back surfaces of the glass plate and impair the design of the showcase. If the coating amount is too small, the fixing will be insufficient and the plate glass will be unstable or damaged. There was a fear. Moreover, further improvement has been demanded for airtightness and heat insulation in the sandwiched portion of the glass plate (joint portion between the plate glass and the frame material).

  In view of the above circumstances, the present specification discloses a technique that provides a door for a showcase that is easy to manufacture, has no backlash, has a highly reliable frame structure, and has good heat insulation.

  The showcase door disclosed in the present specification is a showcase door for opening and closing an opening formed in a housing having a storage chamber, and is arranged on a plate glass and a peripheral portion of the plate glass. A frame body, and the frame body has a recess having an inner surface facing an area extending from one plate surface to the other plate surface across one end surface of the outer surfaces of the plate-like glass. And between the said frame and the said sheet glass, the sealing material contact | abutted to the inner surface of the said recessed part and the outer surface of the said sheet glass is distribute | arranged.

  According to the above configuration, the sealing material disposed between the concave portion of the frame and the peripheral edge of the plate glass suppresses backlash at the joined portion between the plate glass and the frame and improves the structural stability. . In addition, by providing a sealing material made of foamed rubber, etc., the heat insulation, air tightness, and waterproofness at the joint between the glass sheet and the frame are improved, and as a result, cold air leaks are suppressed and the showcase is suppressed. The cooling efficiency can be improved and the operating cost can be reduced.

In the door for a showcase disclosed in the present specification, the seal material is disposed so as to contact the one end surface and the one plate surface of the plate glass, and the other plate of the plate glass. The surface may be crimped to the inner surface of the recess.
According to such a configuration, by using a sealing material having appropriate elasticity, the other plate surface of the plate glass is pressure-bonded to the inner surface of the recess, and the plate glass is fixed in the recess of the frame. Can be held with a holding force of. As a result, an adhesive for fixing the plate glass to the frame is not required, and the work of attaching the frame to the plate glass becomes much easier.

Further, in the showcase door disclosed in the present specification, the one plate surface is located inside the cabinet when the showcase door is attached to the housing and the opening is closed, that is, You may be located in the said storage room side of the said housing | casing.
According to such a structure, an outer side board surface is crimped | bonded to the inner surface of the recessed part of a frame by arrange | positioning a sealing material along the inner side board surface of plate glass. As a result, it is possible to suppress a situation in which water condensed on the outer surface of the sheet glass enters the recessed portion of the frame.

In the door for a showcase disclosed in the present specification, the sealing material can be disposed on the frame body disposed on the peripheral edge portions of the upper edge and the lower edge of the plate glass.
The sealing material can be disposed on the frame disposed on the entire peripheral edge of the sheet glass, and in this way, the backlash of the sheet glass can be reliably suppressed, and airtightness and heat insulation can be improved. it can. Here, in a state in which the showcase door is attached to the housing and used, the plate-like glass often has a rattling in the vertical direction, and cold air and warm air particularly easily flow in and out from the upper edge and the lower edge. Therefore, it is good also as a structure which divides | segments a sealing material and distributes only to the upper edge and lower edge of sheet glass. If it does in this way, compared with the case where a sealing material is arranged over the whole peripheral part of sheet glass, it will not be inferior, reducing the usage-amount of a sealing material and suppressing the cost rise by the increase in a member. The effect of improving the structural stability and the effect of improving the cooling efficiency can be obtained.

In the door for a showcase disclosed in the present specification, the frame body may include a first frame material made of resin, and the recess may be formed in the first frame material.
According to such a configuration, by using a resin member that can be elastically deformed as the first frame member, it is possible to stably sandwich the glass sheet using the elasticity. Moreover, by using a resin member having low thermal conductivity as the first frame member, heat dissipation through the plate glass and the frame can be suppressed. As a result, high structural stability improvement effect and cooling efficiency improvement effect can be obtained.

In the showcase door disclosed in the present specification, the frame body further includes a second metal frame member, and the second frame member includes an inner surface facing the other plate surface of the recess. You may provide the support surface which contacts a part from the outer side and supports said 1st frame material.
According to such a structure, compared with the case where a frame is comprised only with a resin member, the intensity | strength of a frame and by extension, a showcase door can be improved. Furthermore, since the second frame material supports the first frame material from the outside of the concave portion, the other plate surface of the plate glass can be strongly pressed against the inner surface of the frame concave portion, and the plate glass is brought into the frame body. It can be clamped more stably. As a result, the structural stability and the cooling efficiency can be further improved.

  According to the technique disclosed in this specification, a door for a showcase that is easy to manufacture, has no backlash, has a highly durable frame structure, and has good heat insulation properties can be obtained.

Front view of the appearance of a refrigerated showcase with a showcase door according to an embodiment attached Showcase longitudinal section External perspective view of door for showcase AA sectional view in FIG.

<Embodiment>
Hereinafter, a preferred embodiment will be described with reference to FIGS. In this embodiment, the door (showcase door) 1 for attaching to vertical swing opening and closing type refrigerated showcase S1 is illustrated. In the following description, the upper side in FIG. 1 is the upper side U, the near side is the front side F (the rear side is the rear side or the back side), and the left side is the left side L.

First, the overall structure of the showcase S1 to which the door 1 according to the present embodiment is attached will be described below with reference to FIGS.
As shown in FIG. 1, the showcase S <b> 1 includes a storage body (housing) 2 constituted by a vertically long heat insulating box with a front opening, and a machine room 30 disposed below the storage body 2.
As shown in FIG. 2, the inside of the storage body 2 is a storage chamber 20, and a plurality of shelf boards 22 for refrigerated display of food and beverages are vertically separated in the storage chamber 20. Are arranged in a line. Then, a pair of doors 1 are attached to a rectangular opening 21 opened forward in the front of the storage chamber 20 so as to swing open and close in a double-opening manner.

  A refrigeration apparatus (not shown) including at least a compressor and a condenser provided with a condenser fan is accommodated in the machine room 30 disposed below the storage body 2. The machine room 30 is supported by legs 31 provided at the four corners of the bottom surface. The front panel 32 has an intake port 33 for taking outside air into the machine room 30, and the rear panel cools the refrigeration apparatus. An exhaust port (not shown) for exhausting the exhaust heat is provided.

  On the other hand, as shown in FIG. 2, a cooler chamber 40 is defined by extending an air duct 41 serving also as a drain pan on the rear side of the ceiling of the storage chamber 20 in the showcase S1. A cooler 42 and a cold air circulation fan 43 are accommodated in the chamber 40. Further, a suction port 44 is provided on the front side of the cooler chamber 40, and a blower outlet 45 is provided on the rear side thereof, so that the cooler chamber 40 and the storage chamber 20 communicate with each other. And the cooler 42 accommodated in this cooler room | chamber and the freezing apparatus in the said machine room 30 are circulated and connected by refrigerant | coolant piping, and the known refrigeration circuit is formed.

The cooling operation of the showcase S1 is performed by driving the refrigeration apparatus and the cold air circulation fan 43. When the cool air circulation fan 43 is driven and the air in the storage chamber 20 is sucked from the suction port 44 and guided into the cooler chamber 40, the sucked air in the store flows through the cooler 42. Heat exchange is performed to generate cold air. The cool air generated in this way is blown into the storage chamber 20 from the outlet 45 or the like, and the inside of the storage chamber 20 is cooled.
During this time, the condenser fan installed in the machine room 30 is also driven together with the refrigeration apparatus and the like. When the outside air is sucked from the intake port 33 provided in the front panel 32 of the machine room 30 and guided into the machine room 30 by the condenser fan, the sucked outside air flows between the condenser and the compressor. Cool them with The air heated by the heat exchange is exhausted from an exhaust port provided in a back panel (not shown) to be exhausted.

Next, the structure of the double door type door 1 attached to the opening 21 on the front surface of the storage chamber 20 so as to be able to swing open and close will be described with reference to FIGS. 3 and 4.
FIG. 3 is a perspective view of the door 1 attached to the right side of the showcase S1 of FIG. Since the doors 1 and 1 attached to the left and right of the opening 21 of the showcase S1 have the same structure except that they are bilaterally symmetric, the right door 1 will be described below. As shown in FIG. 3, the door 1 has a structure in which the upper, lower, left and right peripheral portions of the plate glass 90 are roughly sandwiched by the frame body 50 over the entire periphery, and the showcase is passed through the plate glass 90. The inside of the storage chamber 20 inside S1 is visible.

  The frame 50 is a comparative example in which a relatively long vertical frame 51, 51 that sandwiches the left and right ends of the sheet glass 90 and a top end and a bottom end of a sheet glass 90 It is composed of a total of four frames, two short horizontal frames 52, 52. These four frames are cut so that the tips are inclined at 45 °, and are connected via screws or the like so as to abut the inclined portions at the four corners of the sheet glass 90. As shown by broken lines in FIGS. 1 and 3, the upper and lower edges of the glass sheet 90 and four corners, that is, the horizontal frame 52 extends over the entire length, and the vertical frame 51 is sealed at both ends. A material 10 is arranged. In addition, a magnet gasket 80 is attached to the rear surface of the frame body 50 without any breaks so as to extend over the entire periphery of the door 1.

Of the two vertical frames 51, 51 extending in the vertical direction, a handle 53 is attached and fixed to the vertical frame 51 arranged closer to the center in a state where the door 1 is attached to the opening 21 of the storage body 2.
On the other hand, hinges (not shown) provided respectively above and below the opening 21 of the storage body 2 can be fitted at positions near the right vertical frame 51 of the two horizontal frames 52, 52 extending in the left-right direction. A hole 54 is provided and can be pivotally supported by the opening 21 so that the door 1 can be swing-opened with the right end as a rotation fulcrum.

  4 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 4, the horizontal frame 52 is formed of two frame members, a first frame member 60 made of an elastically deformable resin such as polypropylene and a second frame member 70 made of a high-strength metal such as steel. Has been. In FIG. 4, the upper side is the upper side (front side in FIG. 1), the left side is the rear side or the back side, the right side is the front side, and the lower left is the interior of the storage room 20.

The first frame member 60 will be described.
As shown in FIG. 4, the first frame member 60 has a U-shaped concave portion 61 that opens downward toward the sheet glass 90, and the rear side of the concave portion 61 (the storage body 2 side). And has a general shape in which a substantially rectangular frame-like portion in cross-section is continuously provided.

  The concave portion 61 includes an end surface wall portion 63 having an end surface facing surface 63F (inner surface) disposed opposite to an upper end surface (outer surface) 90T of the plate glass 90, and a front surface (outer side plate surface (outer surface) of the plate glass 90. ) 90B), the outer holding wall 62F (inner surface) disposed opposite to the outer holding wall 62 extended downward from the front end of the end wall 63, and the rear surface of the glass sheet 90 (inner plate surface ( And an inner clamping wall 64 extending downward from the rear end of the end wall 63 with an inner clamping surface 64F disposed opposite to the outer surface 90A). That is, the plate glass 90 is sandwiched inside the concave portion 61 including the end face wall portion 63, the outer sandwiching wall portion 62, and the inner sandwiching wall portion 64. An outer sandwiching protrusion 62A and an inner sandwiching protrusion 64A projecting toward the sheet glass 90 are formed at the lower end of the outer sandwiching surface 62F and the lower end of the inner sandwiching surface 64F, respectively. Between them, a sealing material 10 is arranged as will be described later.

  On the rear side of the inner clamping wall portion 64, a portion having a substantially rectangular frame shape in sectional view is formed so as to include this. An inner wall 67 extends from the lower end portion of the inner clamping wall portion 64 toward the rear side (storage body 2 side), while the inner wall also extends from the upper end portion of the inner clamping wall portion 64 toward the rear side. The portion 66 is extended, and the rear end of the inner wall portion 67 and the inner wall portion 66 is connected by the rear wall portion 65, so that a substantially rectangular first hollow portion 69 is defined therein. . Further, the upper end (the second frame member 70 side described later) end of the rear wall 65 extends upward from the connecting portion with the middle wall 66, and the tip thereof is a main hollow portion 59 described later. A part of the opening 58 is defined.

The second frame member 70 will be described.
As shown in FIG. 4, the second frame member 70 has an approximate L shape in sectional view.
Specifically, in a cross-sectional view, the support front wall 71 extending vertically and the outer wall 72 extending front and rear are connected so as to form a substantially right angle, and from the vicinity of the approximate center of the support front wall 71 to the inside of the corner. A substantially rectangular second hollow is formed by a locking wall 74 extending toward the rear side (the storage body 2 side) and a connecting wall 73 that connects between the substantially central portion of the locking wall 74 and the outer wall 72. Part 79 is defined.

The rear surface of the support front wall 71 is in contact with the front surface of the outer holding wall portion 62 of the first frame member 60, and serves as a support surface 71A that supports the front surface.
Further, the rear end portion of the outer wall 72 is bent toward the rear wall portion 65 of the first frame member 60 to form a corner portion 72A, and this tip is a part of the opening 58 of the main hollow portion 59 described later. Is defined. In the outer wall 72, a heater holding portion 72 </ b> B that can fit and support a heater having a circular cross section is provided on the lower side at a position behind the connecting portion with the connecting wall 73.

An engagement structure between the first frame member 60 and the second frame member 70 will be described.
In the first frame member 60, a first locking piece 63 </ b> A that protrudes in a rearward-facing hook shape at the end wall 63 at the coupling portion with the outer clamping wall 62 is located near the middle wall 66. A locking projection 63B protruding upward is formed. Further, in the middle wall portion 66, a second locking piece 66 </ b> A that protrudes upward in a hook-like shape is formed at a position near the end surface wall portion 63. On the other hand, the second frame member 70 has a first locked piece 74A at a position near the support front wall 71 and a second locked piece 74B at the rear end portion of the locking wall 74. It is formed in a stepped shape toward the 60 side (lower side).

  The first frame member 60 and the second frame member 70 are joined by the first locking piece 63A and the first locked piece 74A, and the second locking piece 66A and the second locked piece 74B being locked. The At this time, by using the elasticity of the first frame member 60 made of resin, the first frame member 60 and the second frame member 70 can be combined with each other in a state where tension is applied to the two locking portions. The horizontal frame 52 excellent in stability can be produced. When the first frame member 60 and the second frame member 70 are engaged, the second frame member 70 is in a state where the support surface 71A is in contact with the front surface of the outer holding wall portion 62. It is hold | maintained so that it may distribute | arrange relatively to the front side (outside of a warehouse). A main hollow portion 59 having an opening 58 is formed at the upper rear corner of the horizontal frame 52.

The magnet gasket 80 will be described. The magnet gasket 80 is formed by extruding a flexible resin (soft resin) such as urethane foam, and adsorbs to the wall surface defining the opening 21 of the storage body 2 when the door 1 is closed. The space between the door 1 and the storage body 2 is sealed.
As shown in FIG. 4, the magnet gasket 80 includes a base 81 disposed so as to close an opening 58 defined on the rear surface of the horizontal frame 52 (surface on the storage body 2 side), and a front side (horizontal side) of the base 81. It has the insertion part 82 formed in the frame 52 side), and the main-body part 86 formed in the rear side (storage body 2 side) of the base 81.
The main body portion 86 is formed in a hollow shape by a resin layer thinner than the base portion 81 and the insertion portion 82, and in this, a magnet housing chamber 83 for housing a magnet and two air chambers 84, 85 are formed. It is defined. The main body 86 is in close contact with the front wall around the opening 21 of the storage body 2 by the magnet held in the magnet housing chamber 83 in a state where the door 1 is closed, and the air chamber 84, 85 is appropriately deformed to open. The periphery of 21 is sealed, and the airtightness in the storage chamber 20 is maintained. The insertion portion 82 inserted and locked in the main hollow portion 59 of the horizontal frame 52 has an arrow shape in a sectional view having two cavities 89 on the front side (the horizontal frame 52 side) on the upper side of the base portion 81. It protrudes and fin-shaped pieces 87A and 87B extend vertically. The piece portion 87B extending to the resin-made first frame member 60 side (lower side) is formed to extend longer than the piece portion 87A extending to the metal second frame member 70 side (upper side). ing.

  The magnet gasket 80 can be attached to the horizontal frame 52 after the first frame member 60 and the second frame member 70 are engaged as described above. A magnet gasket 80 is disposed on the rear side of the opening 58 formed on the rear surface of the horizontal frame 52, and the insertion portion 82 made of a flexible resin is inserted into the main hollow portion 59 while being elastically deformed. Then, the pieces 87A and 87B are pushed into the front side of the bent end portions of the rear wall 65 and the outer wall 72 that define the opening 58, and the neck portion of the insertion portion 82 is sandwiched from both the left and right sides. When the head portion of the insertion portion 82 is elastically restored in the main hollow portion 59, the magnet gasket 80 is prevented from coming backward, and the front surface of the base portion 81 and the rear surfaces of the pieces 87 and 87 are connected to the rear wall portion 65 and the outer wall 72. It attaches to the horizontal frame 52 in the state contact | abutted to the edge part.

Now, between the recessed part 61 of the 1st frame material 60 and the plate-shaped glass 90 clamped in the opening of the recessed part 61, the sealing material 10 made of foam rubber which contacts both is arranged. The sealing material 10 is formed of a highly elastic material such as natural rubber and synthetic rubber (including urethane rubber and silicone rubber), and foamed rubber obtained by foaming them (including soft urethane foam and silicone rubber foam). can do. From the viewpoint of developing excellent elasticity and flexibility, the sealing material 10 is preferably formed of foamed rubber. The sealing material 10 can enhance heat insulation, air tightness, and waterproofing at the joint between the plate glass 90 and the horizontal frame 52 (frame body 50).
The sealing material 10 is a long member in which a plate surface contact portion 11 and an end surface contact portion 12 are continuously provided in an angle material shape having an L shape in cross section. It is affixed on the upper edge part of the plate-shaped glass 90 in the state which contact | abutted to the warehouse inner side plate surface 90A, and the end surface contact part 12 was contact | abutted to the end surface 90T of the plate-shaped glass 90. The plate-like glass 90 to which the sealing material 10 is attached has a plate surface contact portion 11 on the inner clamping surface 64F and an end surface contact portion 12 on the end surface facing surface 63F in the recess 61 of the first frame member 60, respectively. It arrange | positions so that it may contact | abut. Thereby, the sealing material 10 is disposed between the inner plate surface 90A and the inner clamping surface 64F, and the end surface 90T and the end surface facing surface 63F, and the gap between them is sealed. Here, the sum of the plate thickness of the plate glass 90 and the thickness of the plate surface contact portion 11 of the sealing material 10 in the natural state is slightly larger than the distance between the outer clamping surface 62F and the inner clamping surface 64F. Is set to Therefore, the sealing material 10 is arranged between the inner clamping surface 64F and the inner plate surface 90A in a state where the plate surface contact portion 11 is elastically deformed, and the plate glass 90 is urged to the outer side by the restoring force. Thus, the outside plate surface 90B is clamped in the recess 61 while being pressed against the outer clamping protrusion 62A formed on the outer clamping surface 62F.

According to this embodiment, the following effects can be obtained.
According to the door 1 of the present embodiment, the sealing material 10 is disposed between the plate glass 90 and the concave portion 61 of the first frame member 60 that sandwiches the peripheral edge portion. Therefore, it is possible to suppress backlash at the joint portion between the plate glass 90 and the first frame member 60 and improve the structural stability. Further, the sealing material 10 can improve heat insulation, air tightness, and waterproofing at the joint portion between the plate glass 90 and the first frame member 60. As a result, cold air leakage and the like are suppressed, the cooling efficiency of the showcase S1 is improved, and the operating cost can be reduced.

  Further, according to the door 1 of the present embodiment, the sealing material 10 includes the plate surface contact portion 11 that contacts the inner plate surface 90A and the inner clamping surface 64F, and the end surface contact that contacts the end surface 90T and the end surface facing surface 63F. A contact portion 12. Since the sealing material 10 made of an elastic resin is disposed between the concave portion 61 and the plate glass 90 in an elastically deformed state, the plate glass 90 is urged to the outside by the restoring force of the seal material 10. The outer platen surface 90B is pressure-bonded to the outer clamping protrusion 62A formed on the outer clamping surface 62F. Therefore, the plate glass 90 can be clamped in the recess 61 with a certain clamping force. As a result, an adhesive for fixing the frame 50 to the plate glass 90 becomes unnecessary, and the manufacturing operation of the door 1 becomes much easier.

  According to the door 1 of the present embodiment, the outer side plate surface 90B of the plate glass 90 is pressure-bonded to the outer holding protrusion 62A formed on the outer holding surface 62F as described above. As a result, it is possible to effectively suppress the water or the like condensed on the outside plate surface 90 </ b> B of the plate glass 90 from entering the recess 61 of the frame body 50.

  According to the door 1 of the present embodiment, the sealing material 10 is divided into two for one door 1, and the total length of the horizontal frames 52, 52 arranged on the upper and lower edges of the sheet glass 90. And it distribute | arranges only to the both ends of the vertical frames 51 and 51 distribute | arranged to a right-and-left edge. Therefore, compared with the case where the sealing material 10 is arranged over the entire peripheral edge portion of the door 1, the usage amount of the sealing material 10 is reduced, and an increase in cost due to an increase in members can be suppressed. Here, since the sealing material 10 is arranged on the upper edge and the lower edge where the plate-like glass 90 is likely to rattle and cool air and warm air easily flow in and out, the sealing material extends over the entire periphery of the door 1. Even when compared with the case where 10 is provided, the structural stability improvement effect and the cooling efficiency improvement effect which are inferior can be obtained.

  According to the door 1 of the present embodiment, the horizontal frame 52 (frame body 50) includes the first frame member 60 made of resin, and the recess 61 that sandwiches the plate glass 90 is formed in the first frame member 60. The Thus, by using the first frame member 60 made of an elastically deformable resin, the glass sheet 90 can be firmly held in the recess 61 by utilizing its elasticity, and high structural stability is realized. it can. Moreover, since the 1st frame material 60 which is a resin member has low heat conductivity, it can suppress the heat loss through the plate glass 90 and the frame 50, and can implement | achieve high cooling efficiency.

  According to the door 1 of the present embodiment, the horizontal frame 52 (frame body 50) further includes a metal second frame member 70, and the second frame member 70 is provided on the outer holding wall portion 62 of the recess 61 from the outside. It has a support front wall 71 provided with a support surface 71A that supports the first frame member 60 in surface contact. Therefore, the rigidity and strength of the horizontal frame 52 (frame body 50) and, as a result, the door 1 can be improved as compared with the case where only the first frame member 60 made of resin is used. Furthermore, the support surface 71A of the second frame member 70 abuts and supports the outer holding wall portion 62 of the first frame member 60 from the outside, so that the outer plate surface 90B of the sheet glass 90 is formed on the outer holding protrusion 62A. The glass plate 90 can be strongly pressure-bonded, and the plate-like glass 90 can be more stably sandwiched in the frame body 50. As a result, the structural stability and the cooling efficiency can be further improved.

<Other embodiments>
The technology disclosed in this specification is not limited to the embodiments described with reference to the above description and the drawings, and for example, the following embodiments are also included in the technical scope.

(1) The technology disclosed in the present specification can be applied not only to the refrigerated showcase S1, but also to a frozen showcase, a warming showcase, and the like. Since the door 1 having high durability and excellent heat insulation can be obtained, while maintaining the temperature of the storage chamber 20 defined inside the housing within a predetermined temperature range, while saving energy, A highly practical structure can be obtained.

(2) In the above-described embodiment, the door 1 is a swing opening and closing type that is attached in a double door manner, but is not limited to such a usage mode. The door attached to the showcase S1 may be a single door or a plurality of doors, and can be applied to a door for a showcase attached in a slide opening / closing manner.
(3) Multi-layer glass may be used as the plate glass 90.

1: Door (showcase door), 2: Storage body (housing), 10: Seal material, 11: Plate surface contact portion, 12: End surface contact portion, 20: Storage chamber, 21: Opening, 50: Frame, 51: Vertical frame, 52: Horizontal frame, 60: First frame member, 61: Recess, 62: Outer clamping wall, 62A: Outer clamping projection, 62F: Outer clamping surface (inner surface), 63: End wall Part, 63F: end face facing surface (inner surface), 64: inner clamping wall portion, 64A: inner clamping protrusion, 64F: inner clamping surface (inner surface), 70: second frame member, 71: support front wall, 71A: support surface , 80: magnet gasket, 90: plate glass, 90A: inner plate surface (outer surface), 90B: outer plate surface (outer surface), 90T: end surface (outer surface), S1: showcase

Claims (6)

A door for a showcase for opening and closing an opening formed in a housing having a storage room,
Sheet glass,
A frame disposed on the peripheral edge of the plate glass,
The frame body has a recess having an inner surface facing an area from one plate surface to the other plate surface across one end surface of the outer surfaces of the plate glass,
A door for a showcase in which a sealing material that contacts the inner surface of the recess and the outer surface of the plate glass is disposed between the frame and the plate glass.   The said sealing material is distribute | arranged so that it may contact | abut to the said one end surface and said one plate surface of the said plate glass, The said other plate surface of the said plate glass is crimped | bonded to the inner surface of the said recessed part. Item 15. A showcase door according to item 1.   3. The showcase door according to claim 2, wherein the one plate surface is located inside the cabinet when the showcase door is attached to the housing and the opening is closed. 4.   The showcase door according to any one of claims 1 to 3, wherein the sealing material is disposed on the frame body disposed on a peripheral portion of an upper edge and a lower edge of the plate-like glass.   The showcase door according to any one of claims 1 to 4, wherein the frame includes a first frame member made of resin, and the recess is formed in the first frame member.   The frame body further includes a metal second frame member, and the second frame member abuts from the outside on a portion having an inner surface facing the other plate surface of the concave portion. The showcase door according to claim 5, further comprising a support surface that supports the display case.

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