JP5255423B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator that opens and closes a storage room by a door filled with a foam heat insulating material.

  A conventional refrigerator is disclosed in Patent Document 1. In this refrigerator, the front surface of the storage room is opened and closed by a door filled with foam heat insulating material. A door cap made of a resin molded product is fitted on the top and bottom of an exterior material that is arranged vertically and forms a peripheral surface. The exterior material has a front panel made of a decorative steel plate covering the front and side surfaces, and a door inner plate of a resin molded product covering the back surface.

  A stock solution of foam heat insulating material such as foamed polyurethane injected into the space formed by the exterior material and the door cap foams, and the inside of the door is filled with the foam heat insulating material. Thereby, a door with high heat insulation is obtained. The door inner plate is provided with an extendable door packing having a magnet that is in close contact with the refrigerator body, and the storage chamber is sealed by closing the door.

Japanese Patent Laid-Open No. 3-91683 (pages 2 to 3 and FIG. 6)

  However, according to the conventional refrigerator, the foam heat insulating material filled in the door adheres to the inner surface of the door cap and shrinks when cured. Accordingly, the door cap has a problem that the inner surface is pulled by the shrinking foam heat insulating material, the outer surface is recessed, and the door is deformed.

  Moreover, when the back side of the door cap is pulled forward by the shrinkage of the foam heat insulating material, the door inner plate fixed to the door cap is separated from the refrigerator body. At this time, when the outside air temperature becomes low (for example, 15 ° C. or less), the door packing is cured and the expansion / contraction amount is reduced, and the door inner plate is separated from the refrigerator main body beyond the extension range of the door packing. Thereby, there also existed a problem which the sealing failure of a storage room generate | occur | produced.

  An object of this invention is to provide the refrigerator which can prevent the deformation | transformation of a door and the sealing defect of a store room.

  In order to achieve the above object, the present invention provides a refrigerator in which a door cap made of a resin molded product is fitted on the top and bottom of a vertically arranged exterior material, and a storage chamber is opened and closed by a door filled with a foam insulation. In the above, at least one of the upper and lower door caps is separated from the foam heat insulating material, protrudes in the vertical direction from the bottom surface, and protrudes in the horizontal direction from the vertical portion facing the foam heat insulating material. Part.

  According to this structure, the door cap of a resin molded product is fitted on the upper and lower sides of the exterior material that forms the peripheral surface of the door. A stock solution of foam heat insulating material such as foamed polyurethane injected into the space formed by the exterior material and the door cap foams, and the inside of the door is filled with the foam heat insulating material. The door cap is provided so as to be separated from the foam heat insulating material, and a vertical portion extending in the vertical direction from the bottom surface covering the upper and lower surfaces of the door is formed facing the foam heat insulating material. A protruding portion protrudes in the horizontal direction in the vertical portion, and the foam heat insulating material penetrates between the bottom surface of the door cap and the protruding portion. The door cap may be formed of a material that is released from the foam heat insulating material, and a member that releases both may be provided between the door cap and the foam heat insulating material.

  Moreover, the present invention is characterized in that, in the refrigerator configured as described above, the protruding portion extends along the vertical portion, and a rib that supports the protruding portion is provided continuously to the vertical portion. According to this configuration, the projecting portion is reinforced by the surface facing the bottom surface of the door cap extending horizontally along the vertical portion and being supported by the rib continuous to the vertical portion.

  According to the present invention, in the refrigerator configured as described above, the door cap is made of a polyolefin resin. According to this structure, the door cap formed of polyolefin resin such as polypropylene is released from the foamed heat insulating material.

  Moreover, the present invention is characterized in that in the refrigerator configured as described above, a free material is disposed on the inner surface of the door cap. According to this configuration, the door cap is released from the foam heat insulating material by applying a free material such as a silicone-based paint on the inner surface of the door cap or by arranging the thin free material.

  Moreover, this invention is a refrigerator of the said structure, The said door cap has the front-surface part distribute | arranged to the front surface of the said door through the said perpendicular | vertical part arrange | positioned on the front side, and the said exterior material in the said clearance gap. While being inserted, the vertical part is closely contacted by elasticity to the back side of the exterior material. According to this structure, the exterior material which consists of a decorative steel plate etc. is inserted in the clearance gap between the front part arrange | positioned at the door front surface, and a vertical part. At this time, the vertical portion made of the resin molded product is in close contact with the exterior material due to elasticity, and leakage of the foam heat insulating material is prevented.

  In the refrigerator having the above-described configuration, the vertical portion is formed longer in the vertical direction than the front surface portion, and the front end of the vertical portion is disposed forward of the surface facing the front surface portion. Is inserted into the gap along the vertical portion. According to this configuration, for example, the vertical portion of the lower door cap is formed to extend upward from the front portion, and the exterior plate is inserted into the gap between the vertical portion and the front portion while pushing the upper end of the vertical portion backward. .

  Further, in the refrigerator having the above-described configuration, the present invention provides a plurality of the protrusions on the front side and the back side of the door, and alternately arranges the protrusions on the front side and the protrusions on the back side in the left-right direction. It is characterized by that.

  According to the present invention, in the refrigerator configured as described above, a guide portion for guiding a tool for punching holes is provided on the inner surface side of the bottom surface of the door cap. According to this configuration, a tool is inserted along the guide portion, and a hole through which a locking lock pin or the like is inserted is formed by punching.

  According to the present invention, since the door cap is released from the foam heat insulating material, the door cap is not pulled when the foam heat insulating material contracts. Therefore, deformation of the door and poor sealing of the storage chamber can be prevented. Moreover, since the door cap is provided with a protruding portion extending in the horizontal direction from the vertical portion protruding vertically from the bottom surface, the foam heat insulating material is filled between the bottom surface of the door cap and the protruding portion. For this reason, even when a twist occurs when the door is opened and closed, the door cap can be prevented from falling off.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of a refrigerator according to an embodiment. In the refrigerator 1, a freezer compartment 2 is arranged at the top, and a refrigerator compartment 3 is arranged below through a heat insulating wall 6 (see FIG. 2). The freezer compartment 2 is opened and closed by a freezer compartment door 4 having a handle 4a at the left end, and the refrigerator compartment 3 is opened and closed by a refrigerator compartment door 5 having a handle 5a at the left end.

  A locking mechanism 10 that locks the freezer compartment door 4 and the refrigerator compartment door 5 is provided at the center upper portion inside the refrigerator compartment door 5. The key cylinder 11 of the locking mechanism unit 10 is exposed on the surface of the refrigerator compartment door 5.

  FIG. 2 is a cross-sectional view taken along the line YY of FIG. The freezer compartment door 4 is placed vertically, and door caps 23 and 24 made of a resin molded product are fitted on the top and bottom of an exterior material 20 that forms a peripheral surface. The exterior material 20 has a front panel 21 made of a decorative steel plate and a door inner plate 22 made of a resin molded product. Both ends of the front panel 21 are formed in a substantially U-shaped cross section by bending, and cover the front, side and back end portions of the freezer compartment door 4. The door inner plate 22 covers the back surface of the freezer compartment door 4 and is formed so as to enter the freezer compartment 2. A space formed by the exterior material 20 and the door caps 23 and 24 is filled with a foam insulation 25 such as polyurethane foam.

  Similarly, door caps 33 and 34 made of a resin molded product are fitted on the top and bottom of the exterior member 30 that is arranged vertically and forms a peripheral surface of the refrigerator compartment door 5. The exterior material 30 has a front panel 31 made of a decorative steel plate and a door inner plate 32 of a resin molded product. Both ends of the front panel 31 are bent rearward to form a substantially U-shaped cross section, and cover the front, side, and rear end portions of the refrigerator compartment door 5. The door inner plate 32 covers the back surface of the refrigerator compartment door 5 and is formed so as to enter the refrigerator compartment 3. A space formed by the exterior material 30 and the door caps 33 and 34 is filled with a foam heat insulating material 25 such as polyurethane foam.

  In addition, a locking chamber 10 a in which the locking mechanism 10 is arranged is provided on the upper part of the refrigerator compartment door 5. The lock chamber 10a is partitioned from the foam heat insulating material 25 by the partition wall 10b.

  The freezer compartment door 4 has door caps 23, 24 attached to the upper and lower ends of the front panel 21, and is placed on a foaming jig with the front face down. And if the raw | natural liquid of the foam heat insulating material 25 is inject | poured in the freezer compartment door 4 and upper part is block | closed with the door inner board 22, the foam heat insulating material 25 will be foamed and filled by heating. The refrigerator compartment door 5 is similarly formed.

  FIG. 3 shows an enlarged view of part A of FIG. The locking mechanism unit 10 includes a lock pin 12 and a lock pin holder 13. The lock pin 12 is connected to a key cylinder 11 (see FIG. 2) and moves up and down by operating a key inserted into the key cylinder 11. The lock pin holder 13 is screwed to a center partition plate 7 attached to the front surface of the heat insulating wall 6 and extends forward, and is disposed between the freezer compartment door 4 and the refrigerator compartment door 5. The lock pin holder 13 is formed with a long through hole 13a through which the lock pin 12 passes. The center partition plate 7 is formed of a magnetic material and is attached to the front surface of the heat insulating wall 6.

  A through-hole 14 through which the lock pin 12 passes is formed in the door cap 33 above the refrigerator compartment door 5. A recess 15 into which the lock pin 12 is inserted is formed in the door cap 24 below the freezer compartment door 4.

  When the lock pin 12 is raised by the key operation, the upper end is disposed in the recess 15 of the door cap 24 through the door cap 33 and the through holes 14 and 13a of the lock pin holder 13. Thereby, the freezer compartment door 4 and the refrigerator compartment door 5 are locked, and when the opening operation is performed independently, the lock pin 12 cannot be brought into contact with the peripheral surface of the recess 15 to be opened. Further, if the freezer compartment door 4 and the refrigerator compartment door 5 are opened at the same time, the lock pin 12 cannot be brought into contact with the peripheral surface of the through hole 13 a of the lock pin holder 13 and opened. When the lock pin 12 is lowered by the key operation, the lock pin 12 is unlocked, and the freezer compartment door 4 and the refrigerator compartment door 5 can be opened.

  Grooves 22a and 32a are formed in an annular shape in the peripheral portion on the back side of the door inner plates 22 and 32. The protrusions 51a of the door packing 51 are press-fitted into the groove portions 22a and 32a, and the door packing 51 is attached to the door inner plates 22 and 32, respectively. The door packing 51 is provided with a magnet 51b at the rear via a gasket 51c that is extendable back and forth. The magnet 51b is attracted to the magnetic center partition plate 7, and the freezer compartment 2 and the refrigerator compartment 3 are sealed.

  The door caps 23, 24, 33, 34 have vertical portions 42, 47 that protrude vertically from the bottom surface and face the foam heat insulating material 25. The front-side vertical portion 42 is provided along the inner surface side of the front panels 21 and 31, and the front portion 41 that protrudes vertically from the bottom surface is formed on the front side of the vertical portion 42 through a gap 44 (see FIG. 4). Is done. The vertical portion 47 on the back side is provided along the inner surface side of the door inner plates 22 and 32, and the door inner plates 22 and 32 are fixed to each other.

  The door caps 23, 24, 33, and 34 are made of a polyolefin resin such as polypropylene and have a property of being released from the foam heat insulating material 25 such as polyurethane foam. For this reason, even if the foam heat insulating material 25 expands and cures, deformation due to the contraction of the door caps 23, 24, 33, and 34 can be prevented.

  At this time, the forward tilt of the vertical portion 47 on the back side of the door caps 23, 24, 33, 34 is prevented. Thereby, the distance of the door packing 51 attached to the door inner plates 22 and 32 fixed to the vertical portion 47 and the center partition plate 7 can be within the extension range of the gasket portion 51c. Accordingly, it is possible to prevent a sealing failure between the freezer compartment 2 and the refrigerator compartment 3.

  FIG. 4 shows an enlarged view of part B of FIG. 5 and 6 show plan views of the door cap 24 below the freezer compartment door 4 and the door cap 33 above the refrigerator compartment door 5, respectively. The door cap 23 above the freezer compartment door 4 and the door cap 34 below the refrigerator compartment door 5 are configured similarly.

  The vertical portions 42 and 47 before and after the door caps 23, 24, 33, and 34 are connected by a plurality of vertical portions 48 that protrude vertically from the bottom surface. Thereby, the strength of the door caps 23, 24, 33, 34 can be improved.

  A gap 44 is formed between the front side vertical part 42 and the front part 41 of the door caps 23, 24, 33, 34, and the front panels 21, 31 are inserted. Therefore, the vertical part 42 and the front part 41 are continuously formed from the front of the freezer compartment door 4 and the refrigerator compartment door 5 to a part on the back side through the side face. In addition, by forming the front panels 21 and 31 to the back side by bending, the strength can be improved and deformation can be prevented.

  The vertical part 42 is formed longer than the front part 41 in the vertical direction, and is elastically deformable. Before the door caps 23, 24, 33, 34 are fitted on the front panels 21, 31, the front end of the vertical portion 42 is disposed forward of the surface 42 a facing the front portion 41.

  When the door caps 23, 24, 33, 34 are fitted on the front panels 21, 31, the vertical part 42 is elastically deformed rearward, and the front panels 21, 31 are inserted into the gaps 44 along the vertical part 42. Thereby, the front-end | tip of the vertical part 42 adheres to the back side of the front panels 21 and 31 by elasticity, and the leakage of the foam heat insulating material 25 can be prevented.

  The vertical portions 42 and 47 are provided with protruding portions 43 that protrude in the horizontal direction toward the inside of the freezer compartment door 4 and the refrigerator compartment door 5. The protrusions 43 extend in the circumferential direction of the freezer compartment door 4 and the refrigerator compartment door 5 and are provided at a plurality of locations. Further, the protruding portion 43 is also provided on a part of the vertical portions 48. Both end portions of the protruding portion 43 are supported by ribs 45 extending from the vertical portions 42, 47 and 48. The rib 45 is formed with an inclined surface on the bottom surface side of the door caps 23, 24, 33, 34.

  Since the protruding portion 43 faces the bottom surface of the door caps 23, 24, 33, and 34, it is formed by a mold that slides on the bottom surface. For this reason, the flat part 46 which a metal mold | die can slide out is formed on a bottom face.

  The foam heat insulating material 25 filled in the freezer compartment door 4 and the refrigerator compartment door 5 penetrates between the bottom surfaces of the door caps 23, 24, 33, 34 and the protrusion 43. The door caps 23, 24, 33, and 34 are separated from the foam heat insulating material 25, but the protrusion 43 contacts the foam heat insulating material 25 when twisting occurs when the freezer compartment door 4 and the refrigerator compartment door 5 are opened and closed. . As a result, the door caps 23, 24, 33, 34 can be prevented from falling off.

  Further, the front side protrusions 43 and the rear side protrusions 43 are alternately arranged in the left-right direction. As a result, the strength of the mold can be prevented from being lowered, and the shrinkage force of the foam heat insulating material 25 can be dispersed to prevent cracks in the vicinity of the protrusion 43.

  In FIG. 6, the door cap 33 is formed with a guide portion 14 a protruding radially around the through hole 14. After the door cap 33 is molded, a pig-shaped punching tool is guided to the guide portion 14a, and the through hole 14 is formed by punching. Thereby, it is possible to share the molds and components with the door caps 23 and 34 that do not form the through holes 14 (punching holes) and the door caps of other types of refrigerators. The guide portion 14a may be formed in an annular shape or an arch shape.

  According to the present embodiment, the door caps 23, 24, 33, 24 are released from the foam heat insulating material 25, so that the door caps 23, 24, 33, 24 are not pulled when the foam heat insulating material 25 contracts. Therefore, the deformation | transformation of the freezer compartment door 4 and the refrigerator compartment door 5, and the sealing defect of the freezer compartment 2 and the refrigerator compartment 3 can be prevented. Further, the door caps 23, 24, 33, 34 are provided with protruding portions 43 that protrude vertically from the bottom surface and extend in the horizontal direction from the vertical portions 42, 47, 48 facing the foam heat insulating material 25. , 33 and 34 are filled with the foam heat insulating material 25 between the bottom surface and the protrusion 43. Therefore, the door caps 23, 24, 33, 34 can be prevented from falling off even when twisting occurs when the freezer compartment door 4 and the refrigerator compartment door 5 are opened and closed.

  In addition, although the protrusion part 43 is provided in the door caps 23, 24, 33, and 34, it may be provided in one of the upper and lower door caps of the freezer compartment door 4 and the refrigerator compartment door 5.

  Moreover, since the protrusion part 43 is extended in the circumferential direction and the rib 45 that supports the protrusion part 43 is provided continuously to the vertical parts 42, 47, 48, the protrusion part 43 is reinforced. Therefore, when the freezer compartment door 4 or the refrigerator compartment door 5 is twisted, deformation and breakage of the protrusion 43 can be prevented.

  Further, since the door caps 23, 24, 33 and 34 are made of polyolefin resin such as polypropylene, they can be easily released from the foam heat insulating material 25.

  It should be noted that the door caps 23, 24, 33, 34 may be released from the foam heat insulating material 25 by providing a release material on the inner surfaces of the door caps 23, 24, 33, 34. A silicon-based paint, a silicon-based resin, or the like can be used as the free material. The free material can be disposed by applying a silicon-based paint, applying a gel-like silicon-based resin, installing a thin-film-like silicon-based resin, or installing a thin paper impregnated with a silicon-based resin.

  In addition, the front panels 21 and 31 (exterior materials 20 and 30) are inserted into the gap 44, and the vertical portion 42 is elastically intimately contacted with the back side of the front panels 21 and 31, thereby preventing the foam insulation 25 from leaking out. Can do.

  Further, the vertical portion 42 is formed to be longer in the vertical direction than the front surface portion 41, and the front end of the vertical portion 42 is disposed forward of the facing surface 42 a to the front surface portion 41, so that the front panels 21 and 31 (exterior materials 20 and 30 ) Is inserted into the gap 44 along the vertical portion 42, the front panels 21 and 31 can be easily inserted, and the vertical portion 42 that is in close contact with the front panels 21 and 31 can be easily realized by elasticity.

  In addition, since the front side protrusions 43 and the rear side protrusions 43 are alternately arranged in the left-right direction, the strength of the mold is prevented from being lowered, and the contraction force of the foam heat insulating material 25 is dispersed to prevent the protrusions 43. Nearby cracks can be prevented.

  Further, since the guide portion 14a for guiding the punching hole tool is provided on the inner surface side of the bottom surface of the door cap 33, the door cap that does not form the punching hole, the mold, and the parts can be shared.

  INDUSTRIAL APPLICATION This invention can be utilized for the refrigerator which opens and closes a storage chamber with the door filled with the foam heat insulating material.

The front view which shows the refrigerator of embodiment of this invention YY sectional view of FIG. Part A enlarged view of FIG. Part B enlarged view of FIG. The top view which shows the door cap below the freezer compartment door of the refrigerator of embodiment of this invention The top view which shows the door cap above the refrigerator compartment door of the refrigerator of embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Freezing room 3 Refrigeration room 4 Freezing room door 5 Refrigeration room door 6 Heat insulation wall 7 Center partition plate 10 Locking mechanism part 11 Key cylinder 12 Lock pin 13 Lock pin holder 14 Through-hole 14a Guide part 15 Recess part 20, 30 Exterior material 21, 31 Front panel 22, 32 Door inner plate 23, 24, 33, 34 Door cap 25 Foam insulation 41 Front part 42, 47, 48 Vertical part 43 Projection part 44 Gap 45 Rib 46 Plane part 51 Door packing

Claims (7)

In the refrigerator to open and close the storage compartment by the handle that inside foam insulation door cap made of a resin molded article and below the outer package and fitted on is provided on one end of the door to be filled which is arranged vertically, the handle A shaft for opening and closing the door is provided at the other end of the door as viewed from above, and at least one of the upper and lower door caps is separated from the foam heat insulating material and protrudes vertically from the bottom surface to form the foam. possess a projection projecting horizontally from the vertical portion and the vertical portion facing the heat insulating material,
The protrusion is
A plurality of first protrusions each provided on the front side and the back side of the door;
A second protrusion provided between the front side and the back side of the door and closer to the shaft than the first protrusion;
Including
The first protrusions are alternately arranged in the left-right direction so as to protrude in the horizontal direction toward the inside of the door, and the second protrusions are arranged so as to protrude in the horizontal direction toward the shaft side. A refrigerator characterized by that.   The refrigerator according to claim 1, wherein the protruding portion extends along the vertical portion, and a rib that supports the protruding portion is provided continuously to the vertical portion.   The refrigerator according to claim 1 or 2, wherein the door cap is made of a polyolefin resin.   The refrigerator according to claim 1 or 2, wherein a free material is disposed on an inner surface of the door cap.   The door cap has a front surface portion disposed on the front surface of the door via a gap and the vertical portion disposed on the front surface side, and the exterior material is inserted into the clearance and the back surface side of the exterior material is The refrigerator according to any one of claims 1 to 4, wherein the vertical portion is brought into closer contact with elasticity.   The vertical portion is formed longer in the vertical direction than the front surface portion, the tip of the vertical portion is arranged in front of the surface facing the front surface portion, and the exterior material is inserted into the gap along the vertical portion. The refrigerator according to claim 5. The refrigerator according to any one of claims 1 to 6, wherein a guide portion for guiding a punching hole tool is provided on an inner surface side of the bottom surface of the door cap .

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