JP7063974B2 - refrigerator - Google Patents

Description

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

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

Japanese Unexamined Patent Publication No. 2016-161219

Here, the hot melt has a difference in the degree of curing due to the time difference between the place where the door frame is first applied and the place where the hot melt is last applied, and the place where the hot melt is first applied cures faster than the place where the hot melt is applied last. Therefore, when the outer plate is attached after the hot melt is applied to the entire surface, the place where the hot melt is first applied is fixed at a higher position than the place where the hot melt is last applied. 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 place where the last application was applied becomes more remarkable, and the difference in the height of the mounting position of the outer plate becomes more remarkable. As a result, the outer panel may be tilted and fixed as a whole, resulting in poor appearance. Especially in winter, when the hot melt takes a short time to cure, the possibility of such appearance defects increases.

On the other hand, in the summer when the hot melt has a long time to cure, if the hot melt has a large thickness, it cannot withstand the creep stress and the outer panel shifts with respect to the door frame, resulting in an appearance. Defects may occur.

Therefore, it is an object of the present invention to provide a refrigerator in which the appearance defect of the outer panel is suppressed.

The present invention
With the outer panel
The first door frame portion and the second door frame portion which are provided on the peripheral edge of the outer plate and partially overlap in the front and back directions, and
An adhesive which is provided so as to straddle the overlapping portion of the first door frame portion and the second door frame portion and which adheres the outer plate, the first door frame portion, and the second door frame portion is provided. ,
In the portion where the first door frame portion and the second door frame portion overlap in the front and back directions, a heat insulating material is arranged in a region opposite to the region to which the adhesive is applied. Refrigerator door where there is a space .

According to the present invention, it is possible to provide a refrigerator in which the appearance deterioration of the outer panel is suppressed.

It is a front view which shows an example of the refrigerator which concerns on embodiment of this invention. It is an exploded perspective view which shows the rotary insulation door. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is sectional drawing which shows the main part of FIG. 3 schematically. It is sectional drawing which shows schematic structure of a door frame. It is sectional drawing which shows the detailed structure of a glass. (A) is a cross-sectional view showing the arrangement of a reaction type hot melt, and (b) is a cross-sectional view showing reinforcement of a flange portion. It is a schematic diagram which shows the fixing means which prevents the displacement of an outer plate. It is a perspective view when the drawer type insulation door is seen from the front side. It is a perspective view when the drawer type insulation door is seen from the back side. It is a perspective view which shows the inside of an inner plate. It is a front view which shows the door frame. 12 is a cross-sectional view taken along the line XIII-XIII of FIG. (A) is the structure of the door frame of the present embodiment, and (b) is the structure of the door frame of the comparative example. It is a perspective view which shows the fixing means of the reinforcing plate member as a comparative example. This is an example showing the strength in the normal direction of the door 10 minutes after the glass is attached using hot melt. This is an example showing the strength in the tangential direction of the door 10 minutes after the glass is attached using hot melt.

Hereinafter, as an embodiment of the present invention, a 6-door type refrigerator 1 will be described as an example, but the number of doors is not limited, and the present invention may be applied to a type having 5 doors or less or a 1-door type. Further, in the following, the direction when the refrigerator 1 is viewed from the front will be described as a reference. Further, in the drawings shown below, the same members are appropriately designated by the same reference numerals, and duplicated description will be omitted as appropriate. Further, the size and shape of the member may be deformed or exaggerated schematically for convenience of explanation. Further, 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 freezing room, quick freezing room) 4, a lower freezing room 5, and a vegetable room 6. The line shown by the alternate long and short dash line in FIG. 1 indicates the position where the reaction type hot melt adhesives 70 and 70A, which will be described later, are applied.

The refrigerator 1 has a rotary (hinge type) heat insulating door 2a and 2b that opens and closes the refrigerating chamber 2, a drawer type heat insulating door 3a that opens and closes the ice making room 3, and a drawer type heat insulating door that opens and closes the switching room 4. It is provided with 4a, a drawer-type heat-insulating door 5a for opening and closing the lower freezer compartment 5, and a drawer-type heat-insulating door 6a for opening and closing the vegetable compartment 6. Since the rotary heat insulating door 2a and the heat insulating door 2b have the same configuration, the heat insulating 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 2a is arranged on the glass outer plate 10 provided on the surface of the heat insulating door 2a, the door frame 20 provided on the peripheral edge of the outer plate 10, and the back surface of the outer plate 10. The foam heat insulating material 50 (see FIG. 3) filled with the vacuum heat insulating material 30 interposed therebetween the vacuum heat insulating material 30 in the space 40 formed by the outer plate 10 and the door frame 20, and the back surface of the door frame 20. It is configured to include 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 shell, design surface) on the surface (front surface) side of the heat insulating door 2a. The outer peripheral portion of the outer plate 10 is attached to the inner front end portion of the vertically long square frame-shaped door frame 20, and is covered by the door frame 20. The door frame 20 is made of, for example, ABS (acrylonitrile butadiene styrene copolymer) resin.

The door frame 20 has a frame member 21 formed along the right edge portion of the outer plate 10, a frame member 22 formed along the left edge portion of the outer plate 10, and an upper edge portion of the outer plate 10. The frame member 23 is formed in combination with the frame member 23 formed along the lower edge portion of the outer plate 10.

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

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

In this embodiment, a case where only one side (left side), which 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, but the present invention is not limited to one side. There may be a plurality of two or more sides.

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

As shown in FIG. 3, the engaging groove 21a of the frame member 21 is composed of a concave groove into which the right edge portion of the outer plate 10 is inserted. Further, regarding the engaging groove in which the upper edge portion and the lower edge portion of the outer plates 10 of the frame members 23 and 24 are engaged, the upper edge portion and the lower edge portion of the outer plate 10 are also the same as in the engaging groove 21a. Consists of a concave groove into which is inserted.

The frame member 22 has a plate-shaped main body portion 22b extending along the front-back direction (front-back direction of the refrigerator 1). The main body portion 22b is formed with a flange portion 22a that extends along the outer plate 10 side and at right angles to the main body portion 22b. The flange portion 22a is located at a substantially end portion on the front side of the frame member 22. Further, the main body portion 22b is formed with reinforcing ribs 22c and 22c extending in parallel with the flange portion 22a. The reinforcing rib 22c has a function of reinforcing the frame member 22 and a function of enhancing the adhesiveness 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, but for example, it 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 laminated film and the inside is vacuum-packed and sealed. Since the thermal conductivity is almost zero, it has excellent heat insulating performance. Further, the vacuum heat insulating material 30 is formed in a flat plate shape and is adhered to the back surface side of the outer plate 10.

In the heat insulating door 2a, the outer plate 10 and the inner plate 60 are arranged apart from each other in the front-rear direction (front and back directions), the vacuum heat insulating material 30 is arranged on the surface side of the space 40, and the heat insulating material 30 is foamed in the space excluding the vacuum heat insulating material 30. The heat insulating material 50 is configured to be arranged. The vacuum heat insulating material 30 is formed to have a shorter length 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 foamed heat insulating material 50 has a function as a heat insulating material and a function as an adhesive. Further, the foam heat insulating material 50 is provided with 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 central portion and the door frame 20 attached to the outer periphery of the outer plate 10. By interposing and filling, it is adhered to the inner wall surface of the space 40. Therefore, the foam heat insulating material 50 is adhered to the back surface of the outer plate 10 in a state of covering the vacuum heat insulating material 30.

Further, the foam heat insulating material 50 is made of hard urethane foam. This rigid urethane foam is formed by foaming the urethane foam stock solution (raw material solution of the foamed heat insulating material) injected into the space 40 inside the heat insulating door 2a and then curing it. By the way, as the urethane foam undiluted solution, for example, a solution obtained by premixing a polyether polyol with a foaming agent such as cyclopentane and water, and an auxiliary agent such as a catalyst and a foam stabilizer, and an isocyanate solution are 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, on the outer peripheral portion on the back surface side of the inner plate 60, a sealing member (not shown) is provided for ensuring the airtightness of the storage chamber by bringing the heat insulating door 2a into close contact with the refrigerator main body.

Further, although it is simplified and shown by a thick line in FIG. 3, a paint layer 80 is provided on the back surface of the outer plate 10, and a shatterproof film 90 is provided on the back surface of the paint layer 80. Details of the paint layer 80 and the shatterproof film 90 will be described later (see FIG. 6).

FIG. 4 is a cross-sectional view schematically showing a main part of FIG. Note that 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 22a is a plate-shaped member in a cross-sectional view extending parallel to the outer plate 10. Further, the flange portion 22a is formed so as to extend in a direction orthogonal to the paper surface of FIG. 4 (see FIG. 2). Further, the flange portion 22a is formed with a rib 22d protruding toward the outer plate 10 on the surface on the outer plate 10 side. 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-shaped member, and chamfered portions 10a and 10a are formed at the corner portions on the front surface side and the corner portions on the back surface side of the end portions thereof. The chamfered portion 10a has corners cut in a straight line, but is not limited to such a shape, and as shown by a broken line, the entire end face is curved (arc-shaped). It may be formed in.

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

The rib 22d formed on the flange portion 22a is located inside (center side in the left-right direction) of the positions of the chamfered portions 10a and 10a (line L1 indicated by the alternate long and short dash line). This makes it possible to prevent the gap between the outer plate 10 and the rib 22d from becoming large.

Further, the adhesive 70 is applied to the flange portion 22a inside the rib 22d. Then, the adhesive 70 is pressed by the outer plate 10, so that the outer plate 10 is adhered and fixed to the frame member 22. In FIG. 4, the adhesive 70 indicated by dots indicates the state after fixing, and the elliptical shape indicated by the alternate long and short dash line indicates the state before fixing (before pressing the outer plate 10). The adhesive 70 before fixing is formed 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 larger than 0.4 mm and 0.6 mm or less except for a portion that is difficult to process due to the design.

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

On the other hand, if the hot melt is thickened and bonded, the "shear strength", which is the strength in the tangential direction, is lowered. FIG. 17 is an example of “shear strength” 10 minutes after the glass is attached using the same hot melt. The line with a safety factor of 3 times shown in the figure is the likelihood of creep load applied from the glass during material handling, as in the case of “peeling strength”. As shown in FIG. 17, the “shear strength” becomes higher when the thickness of the hot melt is thinner.

Therefore, the upper limit of the thickness of the hot melt will be described. Considering the safety factor based on the creep stress of the glass, the "shear strength" of the hot melt needs to be 0.20 N / mm2 or more. However, the "shear strength" of the hot melt changes depending on the bonding environment temperature and tends to decrease when the temperature is high. Especially in the summer, when the hot melt takes a long time to harden, if the thickness of the hot melt is increased, it cannot withstand the creep stress, and the glass shifts with respect to the door frame, and when it adheres, it skips. The phenomenon that the glass is fixed at another position occurs. Therefore, in order to secure a "shear strength" of 0.20 N / mm2 or more even in the summer, the thickness of the hot melt is set to 0.6 mm or less.

Even if the thickness of the hot melt is larger than 0.6 mm, it is sufficient to promote the solidification of the hot melt by leaving it for about a day and night after production, and then handle the material after the solidification. In this case, keep the door. It is difficult to realize when considering productivity, such as the problem of warehouse space and the need for certain shelf assets in manufacturing.

Further, when the thickness of the hot melt is set to 0.6 mm or less as in the present embodiment, the difference in the degree of curing of the hot melt becomes small between the place where the hot melt is first applied and the place where the hot melt is applied last. For this reason, the difference in height when the glass is attached and solidified is small between the place where the glass is first applied and the place where the glass is last applied, so that appearance defects such as tilting of the glass are less likely to occur. Therefore, even in the short winter season when the curing time of the hot melt is short and the degree of curing tends to differ between the beginning and the end of application, it is possible to prevent poor appearance by thinning the hot melt. If a reactive hot melt, which will be described later, is used, the melting point is lower and the solidification is slower than other hot melts such as polyamide hot melt, so the difference in the degree of curing between the beginning and the end of coating is small. Tilt is less likely to occur.

If most of the regions to which the hot melt is applied are larger than 0.4 mm and 0.6 mm or less, a certain effect can be obtained, so it is not always necessary to maintain such a thickness in all regions. Further, if the lower limit of the thickness of the hot melt is set to 0.5 mm, it is possible to more reliably prevent the appearance defect in terms of "peeling strength".

The reactive hot melt used in the adhesive 70 is not a general thermoplastic (melts when heat is applied) hot melt, but has a property of not melting even when heat is applied. In addition, the reactive hot melt has a 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 by utilizing water (in the air) after being heated and melted. Specifically, PUR (poly polyolefin reactive), POR (polyolefin reactive), and the like can be applied. When an inexpensive material such as PE (polyethylene) or poorly adhesive PP (polypropylene) is used as the door frame 20 (see FIG. 2), POR, which is the same olefin-based hot melt, is used. It is desirable to use. Even if the door frame 20 is made of an inexpensive material from ABS, good adhesiveness can be obtained by applying POR.

When fixing the outer plate 10 to the frame member 22, the adhesive 70 is first applied so as to be higher than the height of the rib 22d as shown by the alternate long and short dash line. Then, the adhesive 70 is pressed against the flange portion 22a by the outer plate 10, so that the outer plate 10 is fixed to the frame member 22 (flange portion 22a) in a state of being flattened in the left-right direction as shown 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 of the refrigerator 1 (see FIG. 1) from being deteriorated.

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 (applied) into a predetermined position, so that the reaction of isocyanate proceeds using the moisture in the air, gas is generated, and urethane is generated. A bond is generated. At this time, as shown in FIG. 4, by configuring the gap S to be formed between the outer plate 10 and the rib 22d, the generated gas can be released to the outside.

FIG. 5 is a cross-sectional view schematically showing the structure of the door frame. Note that 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 22a formed on the front surface side along the back surface of the outer plate 10. Further, the frame member 22 has reinforcing ribs 22c, 22c, 22c formed so as to project in parallel with the flange portion 22a on the back surface side of the flange portion 22a. Each reinforcing rib 22c is formed to have substantially the same length from the base end to the tip 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 portion 22a is formed longer than each reinforcing rib 22c.

By setting the lengths of the flange portion 22a and the reinforcing ribs 22c in this way, the jig 100 used for fixing the outer plate 10 to the frame member 22 can be applied to the back surface 22a2 of the flange portion 22a. .. The jig 100 here is a member that suppresses bending deformation of the flange portion 22a when the outer plate 10 is applied to the flange portion 22a. As a result, when the outer plate 10 is pressed from the front side by the force F to bond and fix 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 can be reliably supported. Adhesion with can be improved.

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

As shown in FIG. 6, the back surface of the glass outer plate 10 is coated (formed) with a colored paint layer 80 for concealing properties. As a result, the foamed heat insulating material 50 (see FIG. 3) on the back surface side is treated so as not to be seen from the front side, so that the heat insulating door 2a (see FIG. 3) having excellent appearance can be obtained. The back surface of the outer plate 10 may be mirror-treated instead of the paint layer 80.

Further, a shatterproof film 90 is further attached to the back surface of the paint layer 80. The shatterproof film 90 can protect the outer plate 10 from scattering to the surroundings even when the outer plate 10 is cracked or cracked due to an impact applied to the outer plate 10 made of glass. Is.

The shatterproof film 90 is a resin-made thin-film member arranged on the back surface of the outer plate 10. Further, the material of the shatterproof film 90 is not particularly limited as long as it is a film-shaped member. As an example of the shatterproof film 90, a polyester film (PET film) can be mentioned. The PET film has high strength and is also effective in preventing scattering when the glass breaks. Further, the PET film has high transparency, and by printing on the back surface of the base material of the shatterproof film 90, the paint layer 80 can be seen through the film, so that the decorative sheet has a high gloss and a high-quality design. It is possible to. Further, the PET film has excellent heat resistance and cold resistance, can protect the paint layer against the high temperature at the time of filling the foamed heat insulating material 50 (see FIG. 3), and can protect the paint layer from the outside air temperature transmitted from the outer plate 10. There is little impact.

In the embodiment shown in FIG. 6, the shatterproof film 90 and the frame member 22 are fixed via the adhesive 70. In this case, if the shatterproof film 90 before sticking is wound in a roll shape, it is formed on the base material, the adhesive layer (adhesive layer) formed on one side of the base material, and the other side. It is configured by laminating with a fluorine-coated mold release material. When the film is attached on the paint layer 80, the film is drawn out from the roll-shaped shatterproof film 90, and the side of the adhesive layer is attached to the paint layer 80. On the other hand, the release material of the shatterproof 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 (adhesion becomes worse). In the present embodiment, when the shatterproof film 90 is attached to the paint layer 80, it is particularly preferable to use a film that does not contain a fluorine-based coated release material. Even when only the shatterproof film 90 is provided on the outer plate 10, it is preferable to use a film that does not contain a fluorine-coated mold release material.

Further, the outer plate 10 is not limited to the configuration in which both the paint layer 80 and the shatterproof film 90 are provided, and may be provided only with the paint layer 80. 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, when the hot melt of PUR is cured, it is easily subjected to heat shrinkage, so that the tensile force (Young's modulus) becomes high. Therefore, the tensile force becomes stronger than the adhesive force between the paint layer 80 and the outer plate 10, and the paint layer 80 may be peeled off. Therefore, when PUR is used, it is preferable not only to provide the paint layer 80 on the outer plate 10 but also to further provide the shatterproof film 90 on the paint layer 80. The sticking position is provided so as to be inside the paint layer 80 and outside the rib 22d. This is because the paint layer 80 and the adhesive 70 come into direct contact with each other to prevent the paint from peeling off due to the shrinkage of the urethane.

FIG. 7A is a cross-sectional view showing the arrangement of the reactive hot melt, and FIG. 7B is a cross-sectional view showing the reinforcement of the flange portion. Note that FIG. 7A shows a state before the outer plate 10 is adhered to the frame member 22. Further, FIGS. 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 set to s1 and the flange portion. When the distance from the tip 22a1 of the 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 by the force F, the bending becomes large on the tip end side of the flange portion 22a and rebounds by the amount pressed by the springback, so that it becomes difficult to obtain a stable adhesive force (for example, the outer plate). 10 and the flange portion 22a are peeled off, and air enters the adhesive 70). Therefore, in the present embodiment, by setting the coating position of the adhesive 70 to s1 <s2, in other words, by setting the coating position of the adhesive 70 to the base end side of the flange portion 22a, springback is reduced. , Stable adhesion is possible.

Further, as shown in FIG. 7B, in the present embodiment, the R-shaped reinforcing ribs 22f are formed on the corner portions formed by the flange portion 22a and the main body portion 22b so as to be less susceptible to the influence of the springback. Alternatively, the C surface may be formed.

FIG. 8 is a schematic view showing a fixing means for preventing the outer plate from shifting.

By the way, in the manufacturing process of fixing the outer plate 10 to the door frame 20, the door frame 20 is laid down and the outer plate 10 is made horizontal. The adhesive immediately after solidification of the hot melt is weak against a force in the shearing direction, and if the door frame 20 is oriented vertically in order to urethane foam the door frame 20 after bonding, the adhesive may shift due to the weight of the outer plate 10.

Therefore, as shown in FIG. 8, in the present embodiment, the abutting ribs 25a and 25b as fixing means are formed at the corners on the opposite side of the adhesive 70. That is, the abutting 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 sticking side of the adhesive 70. The abutting rib 25b is formed at a position facing the right side of the outer plate 10 and at the lower end portion on the opposite side to the sticking side of the adhesive 70.

As a result, even if a force rotating in the direction indicated by the arrow W acts on the outer plate 10, the abutting ribs 25a and 25b can prevent the outer plate 10 from being displaced due to the rotation. That is, the deviation in the vertical direction (Y-axis direction) can be suppressed by the abutting rib 25a, and the deviation in the left-right direction (X direction) can be suppressed by the abutting rib 25b. The positions of the abutting ribs 25a and 25b are not limited to the embodiment shown in FIG.

9 is a perspective view of the drawer-type heat insulating door when viewed from the front side, FIG. 10 is a perspective view of the drawer-type heat insulating door when viewed from the rear side, and FIG. 11 shows the inside of the inner plate. It is a perspective view. In the following, the drawer type heat insulating door 3a of the ice making room 3 will be referred to instead of the refrigerating room two-turn type heat insulating door 2a.

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

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

The inner plate 60A is formed with screw holes 61 at a plurality of positions for supporting the ice container of the ice making chamber 3 (see FIG. 1) and fixing the metal frame member sliding on the side of the heat insulating box (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 by using a reactive hot melt adhesive.

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

As shown in FIG. 12, the door frame 20A is configured by combining a frame member 21A extending in the vertical direction (vertical direction) and a frame member 23A extending in the horizontal direction (horizontal 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 are butted against each other to form an L-shaped seam 26 in front view.

Further, the frame member 21A is formed with a flange portion (brimmed 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 (brimmed 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.

As shown by the alternate long and short dash line in FIG. 12, the adhesive 70A is applied in an L shape along the flange portions 21c and 23b having an L shape in front view. Therefore, the adhesive 70A is applied so as to straddle the seam 26.

As shown in FIG. 13, a stepped portion 21d that bends like a crank is formed at the upper end of the flange portion 21c. That is, the step portion 21d includes a horizontal portion 21d1 extending from the upper end of the flange portion 21c toward 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 front lower end portion of the handle portion 23a. The tip (lower end) of the protrusion 23c is in contact with the step portion 21d. Further, the protruding portion 23c is in contact with the stepped portion 21d. As described above, in the door frame 20A, the frame member 21A and the frame member 23A are partially wrapped (overlapped) in the front and back directions of the outer plate 10 and are in contact with each other in an L shape in a cross-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.

14 (a) is the structure of the door frame of the present embodiment, and FIG. 14 (b) is the structure of the door frame of the comparative example. Note that FIG. 14 shows the orientation when the outer plate 10 is adhesively fixed in the manufacturing process.

In the comparative example shown in FIG. 14B, the upper end surface of the frame member 21A and the tip end surface (lower end surface) 23c1 of the projecting portion 23c are opposed to each other and thrust without providing the step portion 21d (see FIG. 13). This is the case when it is configured to fit. In such a butt state, the jig 110 is applied to the back surface side of the door frame 20A. Then, the adhesive 70A is applied so as to straddle the seam 120, and the outer plate 10 is pressed. At this time, as shown by a thick arrow in FIG. 14B, the adhesive 70A leaks to the back surface side of the frame members 21A and 23A through the gap of the seam 120, so that the adhesive 70A is transferred to the jig 110. It will adhere.

Therefore, in the present embodiment shown in FIG. 14A, as described above, the frame member 21A is provided with a stepped portion 21d so that the upper end and (tip) of the frame member 21A and the lower end (tip) of the frame member 23A are formed. The outer plate 10 is configured to overlap (wrap) in the front and back directions. As a result, the adhesive 70A can be prevented from leaking to the back surface side of the frame members 21A and 23A through the seam 26, and the adhesive 70A can be prevented from adhering to the jig 110.

FIG. 15 is a perspective view showing a means for fixing the 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, in addition to the screw holes 61 (see FIG. 10) in the embodiment, the inner plate 160 is formed with holes 161, 161 for fixing rivets. In the reinforcing plate member 65, rivets 162 and 162 are fixed via holes 161, 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 apply the undercut structure to fix the reinforcing plate member 65, so conventionally, the reinforcing plate member 65 has been fixed by using 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 the reaction type hot melt adhesive, the fixing by the rivet 162 becomes unnecessary, and the reinforcing plate member 65 does not need to be fixed to the inner plate 60A. It is no longer necessary to form a hole for inserting the rivet for passing the rivet 162.

As described above, in the present embodiment, the refrigerator 1 is provided with an outer plate 10 provided on the surface of the heat insulating door 2a and door frames 20 and 20A provided on the peripheral edge 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 by using a reactive hot melt (see FIGS. 4 and 14A). According to this, since the adhesives 70 and 70A (reactive hot melt) do not remelt, appearance defects such as displacement of the outer plate 10 do not occur. For example, the adhesives 70 and 70A do not remelt even when transported in a container such as by sea. Further, 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 the present embodiment, it is possible to realize the refrigerator 1 provided with a door that is unlikely to cause an appearance defect such as a deviation of the outer plate configured as a design surface.

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 flange portion 22a on the outer plate 10 side of the outer plate 10. It has a rib 22d that projects toward the back surface (see FIG. 4). According to this, it is possible to prevent the appearance deterioration due to the adhesive 70 leaking from between the outer plate 10 and the door frame 20.

Further, 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 adhered to each other (see FIG. 4). According to this, the gas generated from the adhesive 70 can be discharged to the outside through the gap S, and the filling defect of the foamed heat insulating material 50 due to the retention of the gas can be suppressed. Further, since the moisture in the air can be taken in through the gap S at the time of bonding in the manufacturing process, the reaction of the adhesive 70 can be stably performed.

Further, in the present embodiment, the door frame 20 has a reinforcing rib 22c on the back side of the flange portion 22a, and the reinforcing rib 22c is formed shorter than the flange portion 22a (see FIG. 5). According to this, the jig 100 used for adhesively fixing the outer plate 10 is applied to the back surface (back surface) of the flange portion 22a, and the adhesive 70 can be crushed by the outer plate 10, so that the outer plate 10 and the outer plate 10 can be crushed. The adhesive strength with the flange portion 22a can be increased.

Further, in the present embodiment, one abutting rib 25a, 25b is provided 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 to abut and fix the outer plate 10. It is provided (see FIG. 8). According to this, it is possible to prevent the outer plate 10 from being displaced due to rotation.

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 in the front and back directions of the outer plate 10. Part of it is wrapped (see FIGS. 12 and 14 (a)). According to this, even if the adhesive 70A is applied to the seam 26 between the frame member 21A and the frame member 23A, it is possible to prevent the adhesive 70A from leaking from the seam 26 to the back surface side.

Further, in the present embodiment, in the flange portion 22a, the distance from the base end 22a3 of the flange portion 22a to one end of the adhesive 70 is the distance from the tip 22a1 of the flange portion 22a to the other end of the adhesive 70. It is formed shorter than (see FIG. 7 (a)). In the flange portion 22a, the base end 22a3 side is less likely to bend and deform than the tip end 22a1 side, so that the adhesive force between the outer plate 10 and the flange portion 222a can be increased.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

For example, ribs projecting to the back surface side of the outer plate 10 may be formed on the proximal end side and the distal end side of the flange portion 22a. As a result, the coating thickness of the adhesive 70 can be made uniform, and a stable adhesive force can be obtained. Further, by forming the pair of ribs, the width of the adhesive 70 can be kept within a predetermined range, so that the flange portion 22a can be made smaller. The rib may be formed only on the proximal end side or may be formed only on the distal end side.

Further, in the above-described embodiment, the heat insulating doors 2a and 3a have been described as an example, but the heat insulating doors 2b, 4a, 5a and 6a may be applied to other heat insulating doors 2b, 4a, 5a and 6a. The position can be set to the position indicated by the alternate long and short dash line in FIG.

Further, in the above-described embodiment, the case where the door frames 20 and 20A are configured by different pieces has been described as an example, but the four sides of the door frames 20 and 20A are integrally configured so that the seam 26 is not formed. May be 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 by using a reactive hot melt adhesive. As a result, it is not particularly necessary to form a hole for fixing when the inner plate 60A is vacuum formed, and the manufacturing cost of the inner plate 60A can be reduced.

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

Claims (3)

With the outer panel
The first door frame portion and the second door frame portion which are provided on the peripheral edge of the outer plate and partially overlap in the front and back directions, and
An adhesive which is provided so as to straddle the overlapping portion of the first door frame portion and the second door frame portion and which adheres the outer plate, the first door frame portion, and the second door frame portion is provided. ,
In the portion where the first door frame portion and the second door frame portion overlap in the front and back directions, a heat insulating material is arranged in a region opposite to the region to which the adhesive is applied. Refrigerator door where there is a space . The overlapping portion of the first door frame portion and the second door frame portion is a joint portion where the first door frame portion and the second door frame portion are butted against each other.
The refrigerator door according to claim 1, which is in contact with the refrigerator door including an L-shape in a cross-sectional view. The overlapping portion of the first door frame portion and the second door frame portion is a corner portion of the door frame formed into a square shape in a front view by combining the first door frame portion and the second door frame portion. Formed in
The refrigerator door according to claim 1 or 2, wherein the region opposite to the region to which the adhesive is applied in the corner portion faces the space.

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