JP2008281333A - Door for storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain a sanitary state of handle periphery, when a U-shaped handle is installed on an outside surface of right-left divided doors in a refrigerator. <P>SOLUTION: A cup-shaped rubber film 22 is installed so as to cover an upper part of a central space 21 in a base 20. A recessed place 28 in the same shape as a recessed part to be formed on an outer wall in the rear of the handle of the door for the refrigerator, is formed above the rubber film 22 on an under surface of a cope 27. The recessed part is molded by plastically deforming a stainless steel plate 30 along the recessed place 28 when hydraulic pressure in the rubber film 22 acts on the stainless steel plate 30 sandwiched between an anvil 24 and the cope 27. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door in a storage such as a refrigerator, a freezer, a cooling storage, and particularly to the vicinity of an opening / closing handle thereof.

  As exemplified in Patent Document 1, a door handle in a conventional refrigerator or the like is configured such that a handle base formed with a recess is fitted into a notch portion on the front surface of the door, and a handle member straddling the recess in the handle base up and down is handled with a screw. Although the handle member is configured to be fixed to the front of the door together with the base so that the size of the handle member protruding forward from the front of the door is reduced, the handle base is formed of a separate member from the front of the door. Since there are inevitably steps or gaps between the edge of the door and the front of the door, this part is easily soiled and difficult to clean. .

Moreover, in the refrigerator shown by patent document 2, the handle | steering-wheel of a door is fastened directly by the outer surface of a door member with a screw, and the recessed part is formed in the door member behind a handle | steering_wheel, Not only is the size unknown at all, but the door member has a vertical cross-section connected from its outer surface into the concave part at a right angle, and the concave part has a horizontal, relatively wide bottom. Accordingly, there is a drawback that the door cleaning water and dust are easily collected, and therefore, when the door is opened and closed by grasping the handle, the hand is soiled, which is also unsanitary.
In addition, since the door member is bent at right angles from the outer surface thereof into the concave portion as described above, the concave portion is formed relatively deep and the distance from the door pack member is narrowed. In this case, it is necessary to dispose a reduced pressure heat insulating material in place of the urethane foam resin, and it is inevitable that the cost increases.
JP-A-3-217780 Japanese Patent Laid-Open No. 61-3978

  The present invention provides a storage employment door that can easily maintain a sanitary condition in a storage door.

  The method for forming a storage door according to the present invention is arranged such that the central portion of the stainless steel plate in which strip portions are respectively formed on the four sides from the central portion facing the concave portion with respect to the mold in which the concave portion is formed on the plane, With the stainless steel plate pressed against the flat surface of the mold, a hydraulic pressure is applied to the central portion of the stainless steel plate from the opposite side of the concave portion to deform the central portion of the stainless steel plate along the inner surface of the concave portion. Thus, the concave portion for operating the handle of the door is formed on the outer wall of the door for storage.

  That is, the handle of the storage door is operated by using a mold in which a recess is formed on a flat surface and deforming the center of the stainless steel plate by applying hydraulic pressure to the center of the stainless steel plate from the opposite side of the recess. Since the concave part for molding is formed, the applied pressure is appropriately dispersed and acts on the stainless steel plate part in the formed concave part, so that the outer surface around the concave part is kept clean by preventing the distortion in the concave part and its periphery. Therefore, it becomes possible to use a stainless steel plate with a recess formed in a part as it is as an outer wall of a door in a storage, and a strip portion is formed on each of the four sides from the center of the stainless steel plate. When sandwiching the stainless steel plate, these strip portions can be used as a presser foot for both types.

  Since the door operating recess for the door is formed directly on the outer wall of the storage door, there is no step or gap between the outer wall and the operating handle recess, so that dirt does not easily adhere to this part, and Since it is easy to clean, the periphery of the handle operating recess can always be kept clean.

In the following, each embodiment of the present invention shown in the drawings will be described with the same reference numerals given to the equivalent parts.
In FIG. 1, doors 2 divided into upper, lower, left and right are respectively attached to the front surface of the refrigerator 1 so as to be rotatable by upper and lower pivot shafts 2 ′. Each door 2 is illustrated in FIGS. 2 and 3. As shown, the outer wall 3 made of stainless steel plate, the inner wall 4 made of a resin door pack, and the foam insulation 5 filled between the outer wall 3 and the inner wall 4, and the substantially U-shaped handle 6 of each door 2 is As shown in FIG. 1, the upper left and right sides of the front surface of the refrigerator 1, for example, the door 2 on the upper left side of FIG. 1 extends vertically on the lower right side of the outer wall 3 of the door 2. Each handle 6 is collected near the center of the front surface of the refrigerator 1.

2 and 3, the handle 6 is disposed so as to straddle the concave portion 7 formed on the outer side surface of the door outer wall 3, and ribs 8 respectively formed on both leg portions are doors. The handle 6 is applied to the flat outer surface 9 of the outer wall 3, and the screw 10 passes through the screw hole 11 and the outer surface 9 of the rib 8 and is screwed into the reinforcing plate 12 on the inner surface of the outer wall 3. The reinforcing plate 12 is also backed by the bottom inner surface of the door outer wall 3.
Furthermore, a cover 13 that covers the outside of the rib 8 is attached between the rib 8 and the outer surface 9, and a gap is formed between the inner surface of the cover 13 and the head of the screw 10, The tip is in elastic contact with the outer surface of the handle 6.

Here, a hydraulic bulge forming method for the recess 7 on the outer surface of the door outer wall 3 will be described.
In FIG. 4, a cup-shaped rubber film 22 is attached to the upper side of the base 20 by a pressing plate 23 so as to cover the upper side of the central space 21 in the base 20 and is accommodated in the lower mold 24. A liquid chamber 25 is formed by the inside of the central space 21 and the rubber film 22, and the liquid chamber 25 is filled with a working liquid 26 such as water or oil containing a rust preventive agent or the like, while the lower surface of the upper mold 27. A recess 28 having the same shape as the recess 7 formed on the outer surface of the door outer wall 3 is formed above the rubber film 22.

  As shown in FIG. 5, the flat material 30 of the door outer wall 3 includes a rectangular central portion 31 that forms the front of the door 2, and a strip portion 32 that continues to the four sides of the central portion 31. The material 30 is arranged on the lower die 24 as shown in FIG. 4 so that the portion of the central portion 31 where the concave portion 7 is to be formed is accurately positioned below the recess 28 of the upper die 27.

  Next, as shown in FIG. 6, the upper mold 27 and the lower mold 24 are pressed and pressed together by pressing, and the material 30 is pressed at an appropriate pressure by the upper mold 27 and the lower mold 24 on the peripheral plane of the recess 28. When sandwiched, a predetermined portion of the material 30 faces the recess 28 of the upper mold 27 accurately.

  Thereafter, as shown in FIG. 7, when a high pressure is supplied from the outside to the hydraulic fluid 26 in the liquid chamber 25, the hydraulic pressure acts on the material 30 via the rubber film 22, so that the material 30 is Since the concave portion 7 is accurately formed by plastic deformation along the concave portion 28, the upper die 27 and the lower die 24 are separated vertically by removing the pressure of the working fluid 26 in the liquid chamber 25 and taken out. The door outer wall 3 can be manufactured by folding each strip part 32 of the four sides from the center part 31 of the material 30 at a right angle.

  In this case, as shown in FIG. 3, the flat outer surface 9 and the upper and lower end portions of the recess 7 are arcs having a radius R centered on the outside of the door 2 of 40 mm or more, preferably 50 mm or more. The vertical cross section is connected to the surface, and the flat outer surface 9 is connected to the upper and lower ends of the recess 7 so that the vertical cross section has an obtuse angle.

In addition, as illustrated in FIG. 2, the recess 7 has a width W larger than the width w of the handle 6 and is formed wider on the left and right than the handle 6 to make the operation of the handle 6 convenient. Further, as shown in FIGS. 2 and 3, in the upper left door 2 of FIG. 1, the lateral width W <b> 1 of the concave portion 7 on the left side of the handle 6 is the lateral width W <b> 2 of the concave portion 7 on the right side of the handle 6. Formed to be larger than
In the upper right door 2 in FIG. 1, the recess 7 is formed symmetrically with the door 2, and in the lower left and right door 2 of FIG. 1, the recess 7 is formed vertically symmetrical with the upper left and right doors 2. Accordingly, each recess 7 is centered on the handle 6, and the other door 2 side adjacent to the side, that is, the side farther from the other door 2 side than the center side of the refrigerator 1, that is, the refrigerator 1 is widely formed on the side surface side.

  In the above apparatus, the recess 7 formed directly on the outer surface of the door outer wall 3 has a lateral width W that is greater than the lateral width w of the handle 6 and is formed wider to the left and right than the handle 6. Since the width W2 of the concave portion 7 on the center side of the refrigerator 1 is smaller than the width W1 of the concave portion 7 on the opposite side from the handle 6, each handle 6 can be easily concentrated near the center of the front surface of the refrigerator 1, Even if the number of doors 2 is increased, the handling of each handle 6 by the user is facilitated, the aesthetic appearance of the front surface of the refrigerator 1 can be improved, and each handle 6 is placed horizontally from the pivot shaft 2 'of each door 2. Since the doors 2 move away from each other, there is an advantage that the opening and closing of each door 2 is relatively light and the opening and closing operation of the door 2 is easy.

  Further, the concave portion 7 of the door 2 is formed by a hydraulic bulge forming method, and as a result of the pressure 30 being appropriately dispersed and acting on the material 30 at the time of forming, the material 30 is a stainless steel plate that is relatively difficult to deform. However, not only the inside of the recess 7 but also the periphery of the recess 7 is hardly cracked and distorted, and the outer surface around the recess 7 is kept clean, so that a bead for suppressing wrinkles is provided around the recess 7. This eliminates the need for trimming after molding, and after forming the recess 7 from the material 30, the outer surface of the material 30 can be used as it is as the outer surface of the door outer wall 3. This can be facilitated.

  Moreover, since the strips 32 are present on the four sides of the central portion 31 of the material 30, the strips 32 can also be used as presser allowances for the upper mold 27 and the lower mold 24 when forming the recess 7. The concave portion 7 can be easily brought close to the corner portion of the central portion 31, that is, the corner portion of the door outer wall 3 near the notch portion between the adjacent strip portions 32 of the material 30 in FIG. There is an advantage that each handle 6 can be easily concentrated near the center of the front surface of the refrigerator 1.

  Furthermore, since the recess 7 of the door outer wall 3 and the periphery thereof are less distorted and relatively high in strength, when a heat insulating material is foamed between the door outer wall 3 and the inner wall 4, the foam is conventionally also foamed in the recess 7. Although it has been necessary to prevent the deformation of the concave portion 7 by backing the pressure holding jig, the foam pressure pressing jig in the concave portion 7 can be made unnecessary, and the foam pressure on the door outer wall 3 side can be eliminated. As the holding jig is a flat one that supports the outer surface other than the recess 7, the manufacturing cost of each door 2 can be easily reduced, and the arrangement of the recess 7 in each door 2 is different. Even in this case, as the foam pressure pressing jig on the door outer wall 3 side, a flat one can be used in common, so that the manufacturing cost of each door 2 can be reduced also from this surface.

  Further, when forming the recess 7 from the material 30, the material 30 and the working fluid 26 are completely partitioned by the rubber film 22, so that they do not come into contact with each other. The liquid 26 does not need to be washed away, and thus the equipment can be greatly simplified. At the same time, there is no loss of the working liquid 26 and the replenishment amount is small, and the working liquid 26 is easily prevented from coming into contact with air. Thus, the deterioration of the hydraulic fluid 26 can be reduced, which is very advantageous for maintenance of the hydraulic fluid 26.

  Furthermore, since the rubber film 22 has a cup shape, the rubber film 22 is not extremely deformed when the concave portion 7 is formed as compared with the plate shape. Therefore, the rubber film 22 is used to form the concave portion 7. Even if it repeats, damage, such as a crack, does not easily occur in the rubber film 22, and the life of the rubber film 22 can be remarkably extended. At the same time, distortion of the presser foot does not easily occur around the recess 7, and the molded door There is a great advantage that the merchantability of 2 can be easily improved.

  On the other hand, the user of the refrigerator 1 tends to open and close by operating the handle 6 with the left hand for the left door 2 and the right hand 2 for the right door 2. Since the thick instep side is inserted into the recess 7 from the side of the refrigerator 1 side of the handle 6, that is, from the side of the large width W 1, it is easy to insert a hand into the recess 7 without enlarging the recess 7 in particular. From this aspect, the door 2 can be easily opened and closed with a special practical effect.

  Moreover, since the recessed part 7 is directly formed in the outer wall 3 of the door 2, and there is no level | step difference and clearance gap between the outer wall 3 and the recessed part 7, it is hard to adhere to this part, and it is easy to clean it. The periphery of the recess 7 can always be kept clean.

  In addition, the flat outer surface 9 and the upper and lower end portions of the recess 7 are connected to each other by an arc surface having a radius R centered on the outside of the door 2 of 40 mm or more, preferably 50 mm or more, and is flat. From the outer side surface 9 to the upper and lower ends of the recess 7, the vertical section is connected so as to have an obtuse angle, and since the lower end of the recess 7 is greatly inclined downward, the door 2 entering the recess 7 The washing water does not quickly flow out from the lower end portion of the concave portion 7 and collect in the concave portion 7, and since dust or the like is not easily collected in the lower end portion of the concave portion 7, the inside of the concave portion 7 is always clean. Even if a hand is inserted into the recess 7 to grasp the handle 6 and the door 2 is opened and closed, the hand is not soiled, and the refrigerator 1 can be always hygienic.

  Further, when the outer surface of the door outer wall 3 in which the recess 7 is formed is clear-coated, the paint does not collect in the recess 7, so that uniform and beautiful coating can be applied to the entire outer surface. When the foam heat insulating material 5 is filled between the door outer wall 3 and the inner wall 4, the foam heat insulating material 5 does not stay on the back surface of the recess 7, and the foam heat insulating material 5 is applied to the entire inner surface of the door outer wall 3. There is an advantage that it can be filled easily.

  Further, the vertical outer surface 9 and the upper and lower end portions of the recess 7 are connected to each other by an arc surface having a radius R of 40 mm or more, and the vertical cross section is formed from the flat outer surface 9 to the upper and lower end portions of the recess 7. Are connected so as to have an obtuse angle, and the concave portion 7 is necessarily formed relatively shallowly, so that the concave portion 7 is hardly distorted during the molding process of the concave portion 7, and behind the concave portion 7. The thickness of the foamed heat insulating material 5 to be filled becomes sufficiently large. Therefore, even if the recess 2 is formed in the door 2, the heat insulating action can be surely performed by the foamed heat insulating material 5. It can be manufactured at low cost.

  In addition, the flat outer surface 9 and the upper and lower ends of the recess 7 are connected by an arc surface having a radius R of 40 mm or more, and the vertical cross section is an obtuse angle from the flat outer surface 9 to the upper and lower ends of the recess 7. If it connects so that it may become easy to insert a hand in the recessed part 7 in order to operate the handle | steering wheel 6, and the recessed part 7 can be formed comparatively shallowly, it will become favorable.

Further, since the cover 13 covers the outside of the rib 8, a gap is formed between the inner surface of the cover 13 and the head of the screw 10, and the tip of the cover 13 is in contact with the outer surface of the handle 6. The cleaning water of the door 2 is not blocked by the cover 13 and directly spills on the screw 10. Even if the cleaning water enters the cover 13, the water does not reach the inner surface of the cover 13. Since the screw 10 is not transmitted and does not wet the screw 10, it is possible to reliably prevent the screw 10 from rusting and contaminating the periphery thereof.
Moreover, since the reinforcing plate 12 is also supported by the bottom inner surface of the door outer wall 3, even if the screw 10 is screwed into the reinforcing plate 12 when the door 2 is assembled, the reinforcing plate 12 is inclined by the bottom inner surface of the door outer wall 3. This has the advantage that it is reliably restrained and therefore the assembly of the door 2 is very easy.

  Further, the ribs 8 which are the upper and lower ends of the handle 6 are fixed to the door 2 with screws 10 and the screws 10 are covered with the cover 13, so that even if an object or the like hits the handle 6, the cover 13 comes off and the screws 10 Therefore, there is an advantage that it is possible to easily prevent a situation in which the handle 6 is loosely attached and the appearance of the door 2 is damaged.

  The modified handle 6 ′ of the resin handle 6 shown in FIGS. 8 to 15 is arranged so as to straddle the recessed portion 7 formed on the outer side surface of the door outer wall 3 in the storage, similarly to the case of the embodiment. A substantially rectangular recess 51 is formed at the upper end of the handle body 50, a screw seat 52 is provided at the bottom thereof, and a screw 54 passing through the through hole 53 of the screw seat 52 is formed on the door outer wall 3. The upper end portion is attached to the door outer wall 3 by being screwed, and a substantially circular recess 55 is formed at the lower end portion of the handle main body 50, and a screw seat 56 is provided at the bottom thereof. A screw 58 passing through the hole 57 is screwed into the door outer wall 3 so that the lower end is attached to the door outer wall 3.

  Further, a pair of substantially rectangular through holes 60 provided in the screw seat 52 extend as square grooves 61 to both inner side surfaces of the recess 51, and the upper ends thereof form a stepped portion 62. Similarly, a pair of substantially rectangular through holes 63 provided in the screw seat 56 extend as square grooves 64 to both inner side surfaces of the recess 55, and upper ends thereof form a stepped portion 65.

  The resin cap 70 is elastically pushed into the concave portion 51 of the handle body 50 from the front side (right side in FIG. 9) to cover the entire concave portion 51 from the front side to the upper surface side (upward in FIG. 9). The outer surfaces of the leg portions 71 are along the inner surfaces of the recesses 51, and the protrusions 72 provided on the outer surfaces of the leg portions 71 are formed by the deflection of the leg portions 71 when the cap 70 is pushed in. Are engaged with the stepped portions 62 on the left and right inner surfaces.

  Further, the resin cap 73 is elastically pushed into the concave portion 55 of the handle body 50 from the front side (right side in FIG. 9) to cover the entire concave portion 55 from the front side, and the outer surface of each leg portion 74 is respectively As in the case of the cap 70, along the inner peripheral surface of the recess 55, the protrusions 75 provided on the outer surfaces of both the leg portions 74 are formed by the deflection of the pair of left and right leg portions 74 when the cap 73 is pushed in. The inner surface of the recess 55 is engaged with a stepped portion 65.

Therefore, in this modified example, the same effect as in the above embodiment can be obtained, and the upper and lower screws 54 and 58 for attaching the handle body 50 to the door outer wall 3 are hidden by the caps 70 and 73, respectively. And since each cap 70, 73 is embedded in the handle body 50 without protruding from the surface of the handle body 50, and the handle 6 'as a whole has a smooth outer shape, the appearance of the handle 6' itself is very good. Smart and beautiful, therefore, the design of the refrigerator 1 is greatly improved when these handles 6 'are intensively arranged near the center of the front of the refrigerator 1 which is almost flat and has no special decoration. Therefore, the commercial value of the refrigerator 1 can be easily increased.

  In addition, since the caps 70 and 73 are embedded in the handle body 50 and their outer surfaces face the front side of the refrigerator 1, the caps 70 and 73 are applied even if some force is applied from the front side in the pushing direction. Of course, the caps 70 and 73 do not easily come off even if a force is applied from other directions.

  In addition, although each said embodiment is related with the refrigerator provided with four doors divided | segmented into the upper and lower sides and right and left, even if it has only two doors on the left and right or the upper and lower sides, it can also be used as storages, such as a freezer and a cooling storage. Similarly, the present invention can be applied in the same manner, and it is needless to say that the same operational effects can be obtained. Further, like a table-type storage, a door handle is provided sideways. Even in this case, by applying the present invention, the same effects as those of the above-described embodiment can be obtained.

According to the method for forming a storage door according to the present invention, the applied pressure is appropriately dispersed and acts on the central portion of the stainless steel plate in the formed door handle operating recess, and the formed recess and Since the surroundings are less likely to be distorted and the strength of the recesses is relatively high, it is not necessary to back up the foam presser in the recesses when foaming the heat insulating material in the door structure, and the recesses are partially recessed It is possible to use the stainless steel plate formed as it is as the outer wall of the door in the storage, so there is an excellent advantage that the manufacturing cost of the door outer wall can be easily reduced, and from the central part of the stainless steel plate Since the strips formed on each of the four sides can be used as the presser foot of both molds, the handle operation recess on the storage door is the corner of the center of the stainless steel plate. KazuSatoshi, there is an advantage that can easily close to the corners of the door near the notch between the strip portions.

The schematic front view in the embodiment of the present invention. The II section enlarged view of FIG. III-III arrow sectional drawing of FIG. The principal part sectional drawing of the apparatus used for the embodiment of this invention. The front view of the principal part raw material used for the embodiment of this invention. FIG. 5 is an operation explanatory diagram of the apparatus of FIG. 4. FIG. 5 is an operation explanatory diagram of the apparatus of FIG. 4. The principal part deformation | transformation front view in the embodiment of FIG. IX-IX arrow sectional drawing of FIG. XX cross-sectional enlarged view of FIG. The partial front enlarged view of FIG. The component perspective view of FIG. FIG. 10 is a partially enlarged longitudinal sectional view of FIG. 9. The component bottom view of FIG. The component perspective view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Door 3 Outer wall 4 Inner wall 5 Foam insulation 6 and 6 'Handle 7 Recess 10 Screw 13 Cover 22 Rubber film 24 Lower mold 25 Liquid chamber 26 Hydraulic fluid 27 Upper mold 28 Recess 30 Material 50 Handle body 54, 58 Screw 62, 65 Stepped portion 70, 73 Cap 72, 75 Projection

Claims (1)

In the heat insulating door provided with a recess for operating the handle of the door provided on the outer wall of the door for storage, the handle is attached to the outer wall extending across the recess, and the recess is formed directly on the outer wall, A heat insulating door for storage, wherein upper and lower ends of the recess are formed by arc surfaces connected to the outer wall by an obtuse angle.

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