JP2019132507A - refrigerator - Google Patents

Abstract

To provide a refrigerating device that restrains poor appearance of an outer plate.SOLUTION: A refrigerator comprises an outer plate 10 provided on a front surface of a heat insulating door, and a door frame provided on a periphery of the outer plate 10. A back side of the outer plate 10 and the door frame are bonded by using a hot-melt adhesive 70. The thickness of the hot-melt adhesive 70 is larger than 0.4 mm and 0.6 mm or less.SELECTED DRAWING: Figure 17

Description

  The present invention relates to a refrigerator having an outer plate on the surface of a door.

  As a refrigerator door, in order to improve glossiness, a door provided with a glass outer plate is known. Further, it has been proposed to attach a glass outer plate to a door frame with a hot-melt adhesive (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2006-161219

  Here, the hot melt has a difference in the degree of curing due to the time difference between the place where it is first applied to the door frame and the place where it is applied last, and the place where it is applied first hardens faster than the place where it is applied last. Therefore, when the outer plate is attached after the hot melt is applied to the whole, the place where the hot melt is first applied is fixed at a higher position than the place where the hot melt is applied last. However, in the refrigerator described in Patent Document 1, the thickness of the adhesive is 0.5 mm or more and 1.5 mm or less, and the hot melt has a large thickness. The difference in the degree of curing from the last applied point becomes more prominent, and the difference in height of the attachment position of the outer plate becomes more prominent. As a result, there is a possibility that the outer plate is inclined and fixed as a whole, resulting in poor appearance. In particular, in the winter season when the time until the hot melt is cured is short, the possibility of occurrence of such appearance defects increases.

  On the other hand, in the summer time when the hot melt takes a long time to cure, if the hot melt has a large thickness, it cannot withstand creep stress, and the outer plate will be displaced from the door frame. Defects may occur.

  Then, this invention makes it a subject to provide the refrigerator which suppressed the external appearance defect of the outer plate | board.

  The present invention is a refrigerator comprising an outer plate provided on a surface of a heat insulating door and a door frame provided on a peripheral edge of the outer plate, wherein the back side of the outer plate and the door frame are hot-melted. The thickness of the said adhesive agent is larger than 0.4 mm and is 0.6 mm or less, It is characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which suppressed the external appearance defect of the outer plate can be provided.

It is a front view which shows an example of the refrigerator which concerns on embodiment of this invention. It is a disassembled perspective view which shows a rotation-type heat insulation door. It is the III-III sectional view taken on the line of FIG. It is sectional drawing which shows the principal part of FIG. 3 roughly. It is sectional drawing which shows the structure of a door frame roughly. It is sectional drawing which shows the detailed structure of glass. (A) is sectional drawing which shows arrangement | positioning of a reactive hot melt, (b) is sectional drawing which shows reinforcement of a flange part. It is a schematic diagram which shows the fixing means which prevents the shift | offset | difference of an outer plate. It is a perspective view when the drawer-type heat insulation door is seen from the front side. It is a perspective view when the drawer-type heat insulation door is seen from the back side. It is a perspective view which shows the inside of an inner board. It is a front view which shows a door frame. It is the XIII-XIII sectional view taken on the line of FIG. (A) is the structure of the door frame of this embodiment, (b) is the structure of the door frame of a comparative example. It is a perspective view which shows the fixing means of the reinforcement board member as a comparative example. It is an example which shows the intensity | strength of the normal direction of a door 10 minutes after sticking glass using a hot melt. It is an example which shows the intensity | strength of the tangential direction of a door 10 minutes after sticking glass using a hot melt.

  Hereinafter, as an embodiment of the present invention, a six-door type refrigerator 1 will be described as an example, but the number of doors is not limited, and may be applied to a five-door type or a one-door type. Moreover, below, it demonstrates on the basis of the direction when the refrigerator 1 is seen from the front. Further, in the drawings shown below, the same members are denoted by the same reference numerals as appropriate, and repeated descriptions are omitted as appropriate. In addition, the size and shape of the member may be schematically represented by being deformed or exaggerated for convenience of explanation. Moreover, in the following description, the “front surface” side means the front side of the refrigerator 1, and the “back surface” side means the rear side of the refrigerator 1.

  FIG. 1 is a front view showing an example of a refrigerator according to an embodiment of the present invention.

  As shown in FIG. 1, the refrigerator 1 includes a refrigerating room 2, an ice making room 3, a switching room (upper freezer room, quick freezer room) 4, a lower freezer room 5, and a vegetable room 6. In addition, the line shown with a dashed-dotted line in FIG. 1 has shown the position which applies the reactive hot-melt-adhesive 70,70A mentioned later.

  The refrigerator 1 includes rotating (hinge) heat insulating doors 2 a and 2 b that open and close the refrigerator compartment 2, a drawer heat insulating door 3 a that opens and closes the ice making chamber 3, and a drawer heat insulating door that opens and closes the switching chamber 4. 4a, a drawer-type heat insulation door 5a for opening and closing the lower freezer compartment 5, and a drawer-type heat insulation door 6a for opening and closing the vegetable compartment 6 are provided. In addition, since the rotary heat insulation door 2a and the heat insulation door 2b have the same structure, the heat insulation door 2a will be described as a representative.

  FIG. 2 is an exploded perspective view showing a rotary heat insulating door.

  As shown in FIG. 2, the heat insulating door 2 a is disposed on the glass outer plate 10 provided on the surface of the heat insulating door 2 a, the door frame 20 provided on the periphery of the outer plate 10, and the back surface of the outer plate 10. And the foam insulation 50 filled with the vacuum insulation 30 interposed in the space 40 formed by the outer plate 10 and the door frame 20, and the back surface of the door frame 20. And an inner plate 60 provided on the (rear surface).

  The outer plate 10 is made of a translucent rectangular flat plate member that forms an outer wall (outer surface, design surface) on the surface (front surface) side of the heat insulating door 2a. An outer peripheral portion of the outer plate 10 is attached to an inner front end portion of a vertically long rectangular frame-like door frame 20 and is covered with the door frame 20. The door frame 20 is made of, for example, ABS (acrylonitrile butadiene styrene copolymer) resin.

  The door frame 20 includes a frame member 21 formed along the right edge of the outer plate 10, a frame member 22 formed along the left edge of the outer plate 10, and the upper edge of the outer plate 10. The frame member 23 formed in this manner and the frame member 24 formed along the lower edge of the outer plate 10 are combined.

  The frame member 21 is formed with an engagement groove 21 a (see FIG. 3) that engages with the right edge of the outer plate 10. The frame member 23 is formed with an engagement groove (not shown) that engages with the upper edge of the outer plate 10. The frame member 24 is formed with an engagement groove (not shown) that engages with the lower edge of the outer plate 10.

  The frame member 22 is formed with a flange portion (a flange portion) 22a that is bonded to the left side edge portion of the outer plate 10 by a reactive hot melt adhesive 70 (hereinafter abbreviated as an adhesive 70). The outer plate 10 is preferably a tempered glass flat plate, but may be a translucent flat plate such as plastic.

  In the present embodiment, a case where only one side (left side) that is at least a part of the four sides of the outer plate 10 is bonded with the adhesive 70 will be described as an example. However, the present embodiment is not limited to one side. There may be a plurality of two or more sides.

  3 is a cross-sectional view taken along line III-III in FIG.

  As shown in FIG. 3, the engagement groove 21 a of the frame member 21 is a concave groove into which the right edge of the outer plate 10 is inserted. In addition, as for the engagement grooves with which the upper edge and the lower edge of the outer plate 10 of the frame members 23 and 24 are engaged, the upper edge and the lower edge of the outer plate 10 are the same as the engagement groove 21a. Consists of a concave groove into which is inserted.

  The frame member 22 has a plate-like main body portion 22b extending along the front and back direction (the front-rear direction of the refrigerator 1). The main body portion 22b is formed with a flange portion 22a extending along the outer plate 10 side and extending orthogonally to the main body portion 22b. The flange portion 22 a is located at a substantially end portion on the front side of the frame member 22. The main body portion 22b is formed with reinforcing ribs 22c and 22c extending in parallel with the flange portion 22a. The reinforcing ribs 22 c have a function as reinforcement of the frame member 22 and a function of improving the adhesion between the frame member 22 and the foamed heat insulating material 50.

  The material of the vacuum heat insulating material 30 is not particularly limited. For example, the vacuum heat insulating material 30 is made of a heat insulating material in which a core material such as glass wool having a porous structure is vacuum-packed with a laminate film and the inside is decompressed and sealed. Since the thermal conductivity is substantially zero, it has excellent heat insulation performance. Further, the vacuum heat insulating material 30 is formed in a flat plate shape and bonded to the back surface side of the outer plate 10.

  In the heat insulating door 2 a, the outer plate 10 and the inner plate 60 are arranged apart from each other in the front-rear direction (front and back direction), the vacuum heat insulating material 30 is arranged on the surface side of the space 40, and foamed in the space excluding the vacuum heat insulating material 30. It is comprised so that the heat insulating material 50 may be arrange | positioned. The vacuum heat insulating material 30 is formed to be shorter in the left-right direction (width direction) than the outer plate 10, and the foam heat insulating material 50 is also filled between the left end of the vacuum heat insulating material 30 and the frame member 22.

  The foam heat insulating material 50 has a function as a heat insulating material and a function as an adhesive. In addition, the foam heat insulating material 50 has the vacuum heat insulating material 30 in the space 40 formed by the outer plate 10 on which the vacuum heat insulating material 30 is placed in the center and the door frame 20 attached to the outer periphery of the outer plate 10. By being interposed and filled, it is bonded to the inner wall surface of the space 40. For this reason, the foam heat insulating material 50 is bonded to the back surface of the outer plate 10 while covering the vacuum heat insulating material 30.

  Moreover, the foam heat insulating material 50 is formed with the hard urethane foam. This rigid urethane foam is formed by curing after a foamed urethane foam stock solution (raw material solution for foamed heat insulating material) injected into the space 40 inside the heat insulating door 2a. Incidentally, as the urethane foam stock solution, for example, a liquid obtained by mixing a liquid obtained by premixing a polyether polyol with a foaming agent such as cyclopentane and water, and further an auxiliary agent such as a catalyst and a foam stabilizer, and an isocyanate liquid is used. Can be mentioned.

  The inner plate 60 is a plate member made of resin (ABS or the like) provided on the storage chamber side of the heat insulating door 2a. Further, the inner plate 60 is fixed to the peripheral edge portion on the back surface side of the door frame 20. Further, a seal member (not shown) is provided on the outer peripheral portion on the back surface side of the inner plate 60 for ensuring the airtightness of the storage room by bringing the heat insulating door 2a into close contact with the refrigerator body.

  Further, in FIG. 3, a simplified illustration with bold lines is provided, but the paint layer 80 is provided on the back surface of the outer plate 10, and the anti-scattering film 90 is provided on the back surface of the paint layer 80. Details of the paint layer 80 and the scattering prevention film 90 will be described later (see FIG. 6).

  FIG. 4 is a cross-sectional view schematically showing a main part of FIG. 4 is an enlarged cross-sectional view showing the flange portion 22a of the frame member 22 and its periphery.

  As shown in FIG. 4, the flange portion 22 a is a plate-like member in a cross-sectional view extending parallel to the outer plate 10. Further, the flange portion 22a is formed to extend in a direction orthogonal to the paper surface of FIG. 4 (see FIG. 2). In addition, a rib 22d that protrudes toward the outer plate 10 is formed on the surface of the outer plate 10 on the flange portion 22a. The rib 22d is located on the proximal end side of the flange portion 22a.

  The outer plate 10 is made of a flat plate member, and chamfered portions 10a and 10a are formed at the corners on the front surface side and the corners on the back surface side of the end portions. The chamfered portion 10a has a corner portion cut into a straight line shape, but is not limited to such a shape, and as shown by a broken line, the entire end surface is curved (arc-shaped). It may be formed.

  The frame member 22 is integrally formed with a contact portion 22 e that extends from the main body portion 22 b to the surface side and contacts the end surface of the outer plate 10. The plate thickness of the contact portion 22e is thinner than the plate thickness of the main body portion 22b. Further, the left surface 22b1 of the main body 22b and the left surface 22e1 of the contact portion 22e are configured to be flush with each other. In this embodiment, the case where the contact portion 22e with which the end surface of the outer plate 10 abuts is formed will be described as an example. However, the contact portion 22e is not formed and the end surface of the outer plate 10 is not formed. The structure which exposes may be sufficient.

  The rib 22d formed on the flange portion 22a is located on the inner side (center side in the left-right direction) than the position of the chamfered portions 10a, 10a (line L1 indicated by a one-dot chain line). Thereby, it can prevent that the clearance gap between the outer plate | board 10 and the rib 22d becomes large.

  An adhesive 70 is applied to the flange portion 22a on the inner side of the rib 22d. Then, when the adhesive 70 is pressed by the outer plate 10, the outer plate 10 is bonded and fixed to the frame member 22. In addition, the adhesive agent 70 shown by the dot in FIG. 4 shows the state after fixation, and the elliptical thing shown by a dashed-dotted line has shown the state before fixation (before pressing the outer plate | board 10). The adhesive 70 before fixing is formed to be higher than the height of the rib 22d.

  Here, the thickness of the hot melt adhesive will be described. In the present embodiment, the thickness of the adhesive 70 is set to be greater than 0.4 mm and less than or equal to 0.6 mm except for parts that are difficult to process due to design.

  FIG. 16 is an example of “peeling strength” which is the strength in the normal direction 10 minutes after the glass is pasted using hot melt. The line of the safety factor 3 times shown in the figure is the likelihood for the impact from the glass during material handling. If it is below this line, the possibility of defects will increase, so it is necessary for production. The hot melt is affected by the environmental temperature during and after bonding, and the strength changes even if the hot melt is the same. However, regardless of the type of hot melt, the “peel strength” tends to increase as the thickness increases. Therefore, considering only “peeling strength”, the thicker the hot melt, the better. Therefore, the lower limit of the thickness of the hot melt is set to a value larger than 0.4 mm in consideration of the safety factor in material handling. When the hot melt thickness is 0.4 mm, when the room temperature drops sharply due to ventilation during manufacturing in the winter season, sufficient glass holding power cannot be obtained, and adhesion failure may occur. This is because

  On the other hand, when bonding is performed by increasing the thickness of the hot melt, the “shear strength” that is the strength in the tangential direction decreases. FIG. 17 is an example of “shear strength” 10 minutes after the glass is pasted using the same hot melt. The line of the safety factor 3 times shown in the figure is the likelihood with respect to the creep load applied from the glass during material handling as in the case of “peeling strength”. As shown in FIG. 17, the “shear strength” has a higher value when the thickness of the hot melt is thinner.

  Therefore, the upper limit of the hot melt thickness will be described. Considering the safety factor based on the creep stress of glass, the “shear strength” of hot melt is required to be 0.20 N / mm 2 or more. However, the “shear strength” of hot melt varies depending on the temperature of the bonding environment and tends to decrease as the temperature increases. In particular, during the summer months when the hot melt takes a long time to cure, if the thickness of the hot melt is increased, it cannot withstand creep stress, and the glass will be displaced from the door frame. A phenomenon occurs in which the glass is fixed at another position. Therefore, the thickness of the hot melt is set to 0.6 mm or less in order to ensure “shear strength” of 0.20 N / mm 2 or more even in summer.

  Even if the thickness of the hot melt is larger than 0.6 mm, the hot melt may be solidified by leaving it to stand for about a day after production, and material handling may be performed after solidification. In this case, the door is stored. This is difficult to realize in terms of productivity, such as warehouse space issues and the need for certain shelf assets in manufacturing.

  Further, when the thickness of the hot melt is 0.6 mm or less as in the present embodiment, the difference in the degree of cure of the hot melt is small between the place where it is first applied to the door frame and the place where it is finally applied. For this reason, since the difference in height when the glass is attached and solidified between the place where it is first applied and the place where it is applied lastly becomes small, appearance defects such as the inclination of the glass are less likely to occur. Therefore, it is possible to prevent appearance defects by thinning the hot melt even in the short winter season when the curing time of the hot melt is short and the degree of curing tends to be different between the beginning and the end of application. If a reactive hot melt described later is used, since the melting point is low and the solidification is slow compared to other hot melts such as polyamide hot melt, the difference in the degree of curing between the beginning and the end of coating is reduced. The inclination of is less likely to occur.

  It should be noted that a certain effect can be obtained if the majority of the region to which the hot melt is applied is larger than 0.4 mm and not larger than 0.6 mm, and it is not always necessary to maintain such a thickness in all regions. Further, if the lower limit value of the thickness of the hot melt is set to 0.5 mm, it is possible to prevent the appearance defect more reliably in terms of “peeling strength”.

  The reactive hot melt used for the adhesive 70 is not a general thermoplastic (melts when heat is applied) hot melt, but has a property that it does not melt even when heat is applied. Moreover, the reactive hot melt has good initial strength rise, little dimensional change after curing, excellent moisture resistance and weather resistance, and does not remelt. This reactive hot melt is an adhesive in which a prepolymer and an isocyanate are mixed, and the reaction proceeds using water (in the air) after being heated and melted. Specifically, PUR (poly urethane reactive), POR (poly olefin reactive), or the like can be applied. In the case of using an inexpensive material such as PE (polyethylene) or hardly adhesive PP (polypropylene) as the door frame 20 (see FIG. 2), the same olefin hot melt POR is used. It is desirable to use it. Even if the door frame 20 is made of an inexpensive material from ABS, good adhesiveness can be obtained by applying POR.

  When the outer plate 10 is fixed to the frame member 22, first, the adhesive 70 is applied so as to be higher than the height of the rib 22d, as indicated by a one-dot chain line. Then, the outer plate 10 is fixed to the frame member 22 (flange portion 22a) in a state where the adhesive 70 is pressed against the flange portion 22a side by the outer plate 10 so as to spread flat in the left-right direction as indicated by dots. . In the present embodiment, by forming the rib 22d on the flange portion 22a, the adhesive 70 reaches the end surface of the outer plate 10, and leaks to the outside from between the end surface of the outer plate 10 and the contact portion 22e. It is possible to prevent the appearance failure of the refrigerator 1 (see FIG. 1).

  By the way, the adhesive 70 is a mixture of the prepolymer and the isocyanate as described above, and has high reactivity. When used, the adhesive 70 is melted (softened) by heat and poured into a predetermined position (applied), whereby the isocyanate reaction proceeds using the moisture in the air, generating gas and urethane. A bond is generated. At this time, as shown in FIG. 4, the generated gas can be released to the outside by forming a gap S between the outer plate 10 and the rib 22d.

  FIG. 5 is a cross-sectional view schematically showing the structure of the door frame. FIG. 5 shows a state before the outer plate 10 is fixed to the frame member 22.

  As shown in FIG. 5, the frame member 22 has a flange portion 22 a formed along the back surface of the outer plate 10 on the front surface side. The frame member 22 has reinforcing ribs 22c, 22c, and 22c that are formed so as to protrude in parallel with the flange portion 22a on the back surface side of the flange portion 22a. Each of the reinforcing ribs 22c is formed to have substantially the same length from the base end to the tip end 22c1. The frame member 22 is configured such that the tip 22a1 of the flange portion 22a and the tip 22c1 of the reinforcing rib 22c have a difference L2. That is, the flange part 22a is formed longer than each reinforcing rib 22c.

  Thus, by setting the length of the flange portion 22a and the reinforcing rib 22c, the jig 100 used when fixing the outer plate 10 to the frame member 22 can be applied to the back surface 22a2 of the flange portion 22a. . In addition, the jig | tool 100 here is a member which suppresses the bending deformation of the flange part 22a, when the outer plate | plate 10 is applied to the flange part 22a. Thereby, when pressing the outer plate 10 with the force F from the front side and bonding and fixing the outer plate 10 to the frame member 22, the flange portion 22a can be reliably supported, and the outer plate 10 and the flange portion 22a are supported. Adhesiveness can be improved.

  FIG. 6 is a cross-sectional view showing a detailed configuration of glass.

  As shown in FIG. 6, a colored paint layer 80 for concealing is applied (formed) to the back surface of the glass outer plate 10. Thereby, since it processes so that the foam heat insulating material 50 (refer FIG. 3) of a back surface side cannot be seen from the front side, the heat insulation door 2a (refer FIG. 3) excellent in the external appearance can be obtained. Note that the back surface of the outer plate 10 may be subjected to a mirror surface treatment instead of the paint layer 80.

  Further, an anti-scattering film 90 is attached to the back surface of the paint layer 80. The anti-scattering film 90 can protect the outer plate 10 from being scattered around even when the outer plate 10 is broken or cracked when an impact is applied to the glass outer plate 10. It is.

  The anti-scattering film 90 is a resinous thin film member disposed on the back surface of the outer plate 10. Further, the material of the scattering prevention film 90 is not particularly limited as long as it is a film-like member. An example of the scattering prevention film 90 is a polyester film (PET film). The PET film has high strength and is effective in preventing scattering when the glass is broken. Further, the PET film is highly transparent, and the coating layer 80 can be seen through the film by printing on the back surface of the base material of the anti-scattering film 90. Therefore, the decorative sheet has a glossy appearance and a high-quality design. Is possible. Further, the PET film is excellent in heat resistance and cold resistance, and can protect the paint layer against the high temperature at the time of filling with the foam heat insulating material 50 (see FIG. 3). There is little influence.

  In the embodiment shown in FIG. 6, the scattering prevention film 90 and the frame member 22 are fixed via an adhesive 70. In this case, if the anti-scattering film 90 before being attached is wound in a roll shape, the base material, the adhesive layer (adhesive layer) formed on one surface side of the base material, and the other surface side are formed. And a fluorine-coated release material to be laminated. When a film is pasted onto the paint layer 80, the film is fed out from the roll-shaped anti-scattering film 90 and the adhesive layer side is stuck to the paint layer 80. On the other hand, the release material of the anti-scattering film 90 and the adhesive 70 come into contact with each other, and the adhesiveness between the outer plate 10 and the frame member 22 is impaired (attachment becomes worse). In this embodiment, when the anti-scattering film 90 is affixed to the paint layer 80, it is particularly preferable to use a film that does not contain a release coating material that is coated with fluorine. Even when only the anti-scattering film 90 is provided on the outer plate 10, it is preferable to use a film that does not contain a release material that is coated with fluorine.

  Further, the outer plate 10 is not limited to the configuration in which both the paint layer 80 and the scattering prevention film 90 are provided, and only the paint layer 80 may be provided. Even when only the paint layer 80 is provided on the outer plate 10, it is preferable to use a paint layer 80 that does not contain fluorine.

  By the way, since the hot melt of PUR becomes easy to receive heat shrinkage when cured, the tensile force (Young's modulus) becomes high. For this reason, the tensile force becomes stronger than the adhesion force between the paint layer 80 and the outer plate 10, and the paint layer 80 may be peeled off. Therefore, when using PUR, it is preferable not to provide only the paint layer 80 on the outer plate 10 but to further provide a scattering prevention film 90 on the paint layer 80. The affixing position is provided so as to be inside the coating layer 80 and outside the rib 22d. This is because the paint layer 80 and the adhesive 70 are in direct contact to prevent paint peeling due to urethane contraction.

  FIG. 7A is a sectional view showing the arrangement of the reactive hot melt, and FIG. 7B is a sectional view showing the reinforcement of the flange portion. FIG. 7A shows a state before the outer plate 10 is bonded to the frame member 22. 7A and 7B show a case where the rib 22d is not provided on the flange portion 22a.

  As shown in FIG. 7A, when the adhesive 70 is applied to the flange portion 22a, the distance from the base end 22a3 of the flange portion 22a to the outer end portion 70a of the adhesive 70 is s1, and the flange portion When the distance from the tip 22a1 of 22a to the inner end 70b of the adhesive 70 is s2, it is preferable to set s1 <s2. That is, when the outer plate 10 is pressed with the force F, the deflection at the tip end side of the flange portion 22a increases and rebounds by the amount pressed by the spring back, making it difficult to obtain a stable adhesive force (for example, the outer plate 10). 10 and the flange portion 22a are peeled off or air enters the adhesive 70). Therefore, in this embodiment, by setting the application position of the adhesive 70 to s1 <s2, in other words, by setting the application position of the adhesive 70 to the proximal end side of the flange portion 22a, the spring back is reduced. Stable adhesion is possible.

  In addition, as shown in FIG. 7B, in this embodiment, R-shaped reinforcing ribs 22f are formed at the corner portions formed by the flange portion 22a and the main body portion 22b so as to be hardly affected by the springback. Alternatively, a C plane may be formed.

  FIG. 8 is a schematic diagram showing fixing means for preventing the displacement of the outer plate.

  By the way, in the manufacturing process which fixes the outer plate 10 to the door frame 20, the door frame 20 is laid down and the outer plate 10 is leveled. The adhesive immediately after solidification of the hot melt is weak in a shearing force, and if the door frame 20 is oriented vertically to urethane foam the door frame 20 after bonding, there is a risk of shifting due to the weight of the outer plate 10.

  Therefore, as shown in FIG. 8, in this embodiment, abutting ribs 25 a and 25 b as fixing means are formed at the corner opposite to the adhesive 70. In other words, the abutment rib 25a is formed at a position facing the lower side of the outer plate 10 and at the right end portion on the opposite side to the side where the adhesive 70 is applied. The abutment rib 25b is formed at a position facing the right side of the outer plate 10 and at the lower end on the opposite side to the adhesive 70 application side.

  Thereby, even if the force which rotates in the direction shown by the arrow W acts with respect to the outer plate | board 10, the shift | offset | difference by rotation of the outer plate | board 10 can be prevented with the butting ribs 25a and 25b. That is, the deviation in the vertical direction (Y-axis direction) can be suppressed by the abutment rib 25a, and the deviation in the left-right direction (X direction) can be suppressed by the abutment rib 25b. The positions of the abutment ribs 25a and 25b are not limited to the embodiment shown in FIG.

  FIG. 9 is a perspective view when the drawer-type heat insulating door is viewed from the front side, FIG. 10 is a perspective view when the drawer-type heat insulating door is viewed from the back side, and FIG. 11 shows the inside of the inner plate. It is a perspective view. Below, it replaces with the refrigerator compartment 2 rotation type heat insulation door 2a, and demonstrates with reference to the drawer type heat insulation door 3a of the ice-making room 3. FIG.

  As shown in FIGS. 9 and 10, the drawer-type heat insulating door 3 a includes a glass outer plate 10 </ b> A (see FIG. 9), a door frame 20 </ b> A, and the rotary heat insulating door 2 a (see FIG. 1). And an inner plate 60A (see FIG. 10).

  The door frame 20A is a quadrangular frame member provided on the periphery of the outer plate 10A. The door frame 20A is similar to the door frame 20 (see FIG. 2) of the rotary heat insulating door 2a described above, and includes a frame member (vertical frame member) 21A, a frame member 22A, and a frame member (horizontal frame member) 23A. The frame member 24A is connected in a horizontally long rectangular shape. The upper frame member 23A is formed with a handle portion 23a for a user to hold when opening and closing.

  The inner plate 60A is formed with a plurality of screw holes 61 for supporting an ice container of the ice making chamber 3 (see FIG. 1) and fixing a metal frame member that slides on the heat insulating box side (see FIG. 1). (See FIG. 10).

  As shown in FIG. 11, the inner plate 60A is a resin plate material provided on the back surface of the door frame 20A (see FIG. 9). For example, the inner plate 60A is configured by, for example, vacuum forming.

  Further, the inner plate 60A is formed in a substantially square concave shape, and a reinforcing plate member 65 is attached to a surface constituting the back surface. The reinforcing plate member 65 is made of metal, and is fixed using a reactive hot melt adhesive.

  12 is a front view showing the door frame, and FIG. 13 is a sectional view taken along line XIII-XIII in FIG.

  As shown in FIG. 12, the door frame 20A is configured by combining a frame member 21A extending in the vertical direction (up and down direction) and a frame member 23A extending in the horizontal direction (left and right direction). Further, the door frame 20A is configured such that the right end of the frame member 23A and the upper end of the frame member 21A abut each other, and an L-shaped seam 26 is formed in a front view.

  Further, the frame member 21A is formed with a flange portion (collar portion) 21c extending inward from the side surface 21b. The flange portion 21c is formed with a predetermined width from the upper end to the lower end. The frame member 23A is formed with a flange portion (collar portion) 23b extending downward from the upper end of the handle portion 23a. The flange portion 23b is formed with a predetermined width from the left end to the right end.

  The adhesive 70 </ b> A is applied in an L shape along flange portions 21 c and 23 b that are L-shaped as viewed from the front, as indicated by a one-dot chain line in FIG. 12. For this reason, the adhesive 70 </ b> A is applied so as to straddle the joint 26.

  As shown in FIG. 13, a stepped portion 21d that bends in a crank shape is formed at the upper end of the flange portion 21c. That is, the step portion 21d is configured to include a horizontal portion 21d1 extending from the upper end of the flange portion 21c to the back surface side and a vertical portion 21d2 that bends upward from the tip of the horizontal portion 21d1.

  The frame member 23A is formed with a protruding portion 23c that protrudes downward from the lower end portion of the front surface of the handle portion 23a. The tip (lower end) of the protrusion 23c is in contact with the step 21d. Further, the protruding portion 23c is in contact with the step portion 21d. Thus, in the door frame 20A, the frame member 21A and the frame member 23A partially wrap (overlap) in the front and back direction of the outer plate 10, and are in contact with each other in an L shape in a sectional view. Further, the surface 21c1 of the flange portion 21c and the surface 23b1 of the flange portion 23b are configured to be flush with each other.

  FIG. 14A shows the structure of the door frame of the present embodiment, and FIG. 14B shows the structure of the door frame of the comparative example. In FIG. 14, in the manufacturing process, the outer plate 10 is shown in the orientation when being bonded and fixed.

  In the comparative example shown in FIG. 14B, the above-described stepped portion 21d (see FIG. 13) is not provided, and the upper end surface of the frame member 21A and the front end surface (lower end surface) 23c1 of the protruding portion 23c face each other and protrude. This is a case where they are configured to be combined. In such a butted state, the jig 110 is applied to the back side of the door frame 20A. Then, the adhesive 70A is applied so as to straddle the joint 120, and the outer plate 10 is pressed. At this time, as shown by a thick arrow in FIG. 14B, the adhesive 70 </ b> A leaks through the gap between the joints 120 and leaks to the back side of the frame members 21 </ b> A and 23 </ b> A, so that the adhesive 70 </ b> A enters the jig 110. Will adhere.

  Therefore, in the present embodiment shown in FIG. 14A, as described above, the frame member 21A is provided with the stepped portion 21d, and the upper end of the frame member 21A (the tip) and the lower end (tip) of the frame member 23A are separated. The outer plate 10 is configured to overlap (wrap) in the front and back direction. Thereby, it is possible to prevent the adhesive 70 </ b> A from leaking to the back side of the frame members 21 </ b> A and 23 </ b> A through the joint 26, and to prevent the adhesive 70 </ b> A from adhering to the jig 110.

  FIG. 15 is a perspective view showing a fixing means for a reinforcing plate member as a comparative example.

In the comparative example shown in FIG. 15, the reinforcing plate member 65 is not fixed with a reactive hot melt adhesive, but is fixed with rivets. That is, the inner plate 160 is formed with rivet fixing holes 161 and 161 in addition to the screw hole 61 (see FIG. 10) in the embodiment. The reinforcing plate member 65 has rivets 162 and 162 fixed thereto through holes 161 and 161.
As described above, conventionally, when the inner plate 161 is manufactured by vacuum forming, it is necessary to fix the reinforcing plate member 65 with the rivet 162. In other words, in vacuum forming, it is difficult to fix the reinforcing plate member 65 by applying an undercut structure, and thus the reinforcing plate member 65 has conventionally been fixed using the rivets 162.

  Therefore, in the present embodiment, as shown in FIG. 11, by fixing the reinforcing plate member 65 to the inner plate 60A using a reactive hot melt adhesive, fixing with the rivet 162 is not necessary, and the inner plate 60A is not fixed. The formation of a rivet insertion hole for passing the rivet 162 is also unnecessary.

  As described above, in the present embodiment, the refrigerator 1 includes the outer plate 10 provided on the surface of the heat insulating door 2a and the door frames 20 and 20A provided on the periphery of the outer plate 10, The back side of the outer plates 10 and 10A and the door frame 20 (frame member 22) are bonded using a reactive hot melt (see FIGS. 4 and 14A). According to this, since the adhesives 70, 70 </ b> A (reactive hot melt) are not remelted, appearance defects such as displacement of the outer plate 10 do not occur. For example, the adhesives 70 and 70A are not remelted even when transported by container such as sea mail. In the present embodiment, the state after the adhesives 70 and 70A are solidified is excellent in weather resistance and strength (shearing force). Therefore, in this embodiment, the refrigerator 1 provided with the door which cannot generate | occur | produce external appearance defects, such as a shift | offset | difference of the outer plate comprised as a design surface, is realizable.

  Further, in the present embodiment, the door frame 20 has a flange portion 22a formed along the outer plate 10, and the flange portion 22a is formed on the surface of the outer plate 10 on the surface of the flange portion 22a on the outer plate 10 side. The rib 22d protrudes toward the back surface (see FIG. 4). According to this, it is possible to prevent an appearance defect due to the adhesive 70 leaking from between the outer plate 10 and the door frame 20.

  In the present embodiment, a gap S is formed between the outer plate 10 and the rib 22d in a state where the outer plate 10 and the door frame 20 are bonded (see FIG. 4). According to this, the gas generated from the adhesive 70 can be discharged to the outside through the gap S, and filling failure of the foam heat insulating material 50 due to gas retention can be suppressed. Further, since moisture in the air can be taken in through the gap S during bonding in the manufacturing process, the reaction of the adhesive 70 can be performed stably.

  Moreover, in this embodiment, the door frame 20 has the reinforcement rib 22c in the back side rather than the flange part 22a, and the reinforcement rib 22c is formed shorter than the flange part 22a (refer FIG. 5). According to this, since the jig 100 used for bonding and fixing the outer plate 10 can be applied to the back surface (back surface) of the flange portion 22a and the adhesive 70 can be crushed by the outer plate 10, The adhesive strength with the flange portion 22a can be increased.

  Further, in the present embodiment, the abutting ribs 25a and 25b that are in contact with and fixed to the outer plate 10, one at the right end in the width direction of the outer plate 10 and one at the lower end in the height direction of the outer plate 10, are provided. This is provided (see FIG. 8). According to this, the shift | offset | difference by rotation of the outer plate | board 10 can be prevented.

  Further, in the present embodiment, the door frame 20 is configured by combining a vertically extending frame member 21A and a horizontally extending frame member 23A, and the frame member 21A and the frame member 23A are arranged in the front and back direction of the outer plate 10. Part is wrapped (see FIGS. 12 and 14 (a)). According to this, even if the adhesive 70A is applied to the joint 26 between the frame member 21A and the frame member 23A, the adhesive 70A can be prevented from leaking from the joint 26 to the back surface side.

  In the present embodiment, the flange portion 22a has a distance from the base end 22a3 of the flange portion 22a to one end of the adhesive 70, and a distance from the tip 22a1 of the flange portion 22a to the other end of the adhesive 70. (See FIG. 7A). In the flange portion 22a, the proximal end 22a3 side is more difficult to bend and deform than the distal end 22a1 side, so that the adhesive force between the outer plate 10 and the flange portion 222a can be increased.

  In addition, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  For example, you may form the rib which protrudes in the back surface side of the outer plate | board 10 in the base end side and front end side of the flange part 22a. Thereby, the application | coating thickness of the adhesive agent 70 can be equalize | homogenized, and the stable adhesive force can be obtained. Moreover, since the width | variety of the adhesive agent 70 can be stored in a predetermined range by forming a pair of rib, the flange part 22a can be reduced in size. The rib may be formed only on the base end side or only on the tip end side.

  In the above-described embodiment, the heat insulating doors 2a and 3a have been described as examples. However, the heat insulating doors may be applied to other heat insulating doors 2b, 4a, 5a, and 6a. The position can be set to a position indicated by a one-dot chain line in FIG.

  In the above-described embodiment, the case where the door frames 20 and 20A are configured as separate pieces has been described as an example. However, the four sides of the door frames 20 and 20A are integrally configured so that the joint 26 is not formed. Also good.

  Further, when a reinforcing plate is provided on the inner wall surface of the inner plate 60A shown in FIG. 10, it may be fixed to the inner wall surface of the inner plate 60A using a reactive hot melt adhesive. Thereby, it is not particularly necessary to form a fixing hole when vacuum-forming the inner plate 60A, and the manufacturing cost of the inner plate 60A can be reduced.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2a, 3a Thermal insulation door 10,10A Outer plate 10a Chamfer 20,20A Door frame 21A Frame member (vertical frame member)
21c Flange portion 22 Frame member 22a Flange portion 22a1 Tip 22a3 Base end 22c Reinforcement rib 22d Rib 23A Frame member (horizontal frame member)
23b Flange part 25a, 25b Butting rib (fixing means)
26 Seam 30 Vacuum heat insulating material 40 Space 50 Foam heat insulating material 60, 60A Inner plate 70, 70A Reactive hot melt adhesive 80 Paint layer 90 Anti-scattering film S Gap

Claims (3)

An outer plate provided on the surface of the heat insulating door;
A door frame provided at the periphery of the outer plate;
A refrigerator comprising:
The back side of the outer plate and the door frame are bonded using a hot melt adhesive,
The refrigerator is characterized in that a thickness of the adhesive is greater than 0.4 mm and equal to or less than 0.6 mm. The door frame has a flange portion formed along the outer plate,
The flange portion has a rib protruding toward the back surface of the outer plate on the surface of the flange portion on the outer plate side,
The refrigerator according to claim 1, wherein the adhesive is formed higher than the rib.   The refrigerator according to claim 1, wherein the adhesive is a reactive hot melt.

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