JP2017211167A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator capable of making large holding force act on a door without mounting a holding mechanism between a hinge shaft and a bearing hole.SOLUTION: In a refrigerator 1 which includes a refrigerator 2 having a storage chamber 6, a door 12 for openably closing an opening portion formed on the storage chamber 6, a bearing hole 41 formed on the door 12, and a hinge shaft 70 disposed on the refrigerator body 2, and in which the hinge shaft 70 is rotatably inserted into the bearing hole 41 to rotatably support the door 11, the hinge shaft 70 includes a flange portion 72 expanded radially outward at an outer side of the bearing hole 41, and the door 11 includes a projecting portion 45 kept into contact with a peripheral face 72a of the flange portion 72 in a state of closing the opening portion. When the door 11 is rotated in a door opening direction, an overlapping amount of the peripheral face 72a of the flange portion 72 and the projecting portion 45 is increased.SELECTED DRAWING: Figure 5

Description

  Embodiments of the present invention relate to refrigerators.

  Conventionally, in a refrigerator, a door pocket for storing a storage item such as a beverage container is provided on a rotary door that opens and closes an opening of a storage chamber. When stored items are stored in the door pocket and the total weight of the door increases, if the door is not held open, the door may open or close without permission due to the inclination caused by the refrigerator installation state. It becomes easy and it may impair usability.

  Therefore, a storage room, a rotary door that opens and closes the front opening of the storage room, and a hinge that supports the rotary door, and the rotary door is provided on the hinge shaft in a refrigerator that is opened and closed with the hinge shaft as a rotation axis. The holding member is stored and combined in the bearing hole provided in the rotary door, and a large holding force does not act on the rotary door until the predetermined opening angle of the rotary door between the bearing hole and the holding member. It has been proposed to provide a holding mechanism in which a large holding force acts on the rotary door when a predetermined opening angle is exceeded (see, for example, Patent Document 1 below).

JP2015-48991A

  However, in the refrigerator disclosed in Patent Document 1, a holding mechanism for applying a large holding force to the rotary door is provided between the bearing hole and the hinge shaft, that is, inside the bearing hole. The heat insulation thickness is reduced around the bearing hole.

  Then, it aims at providing the refrigerator which can make big holding force act on a door, without providing a holding mechanism between a hinge axis | shaft and a bearing hole.

  The refrigerator of the present embodiment is provided in the refrigerator main body provided with a storage chamber, a door that closes an opening provided in the storage chamber so as to be opened and closed, a bearing hole provided in the door, and the refrigerator main body. And a hinge that is rotatably inserted in the bearing hole and rotatably supports the door, wherein the hinge shaft is a flange that extends radially outward outside the bearing hole. The door includes a convex portion that contacts the peripheral surface of the flange portion in a state in which the opening is closed, and the convex surface of the flange portion and the convex portion are rotated when the door is rotated in the door opening direction. The amount of overlap with the part increases.

It is sectional drawing of the refrigerator which concerns on one Embodiment of this invention. It is a top view of the refrigerator shown in FIG. It is a disassembled perspective view which decomposes | disassembles and shows the right door of the refrigerator compartment of the refrigerator shown in FIG. It is a perspective view which expands and shows the hinge accommodating part provided in the right door. It is AA sectional drawing of FIG. It is a perspective view of a bush member. It is a top view which expands and shows the hinge unit which removed the hinge cover in the closed state. It is a top view which expands and shows the hinge unit which removed the hinge cover in the door open state. It is a top view which expands and shows the hinge unit which removed the hinge cover in the door opening state with a larger rotation angle than FIG. It is a top view which expands and shows the hinge unit which removed the hinge cover in the open door state where a rotation angle is larger than FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the refrigerator main body 2 of the refrigerator 1 has a rectangular box shape with an open front surface, and a vacuum heat insulating material is provided between a steel plate outer box 3 and a synthetic resin inner box 4. And a heat insulating material 5 such as a foam heat insulating material. The refrigerator main body 2 has a plurality of storage rooms. As the storage room, a refrigeration room 6 is provided at the top, a vegetable room 7 is provided thereunder, and an ice making room and an upper freezing room 8 are provided below the vegetable room 7 side by side. A lower freezer compartment 9 is provided below the upper freezer compartment 8.

  In this example, the front opening of the refrigerator compartment 6 is closed by two double doors 10 and 11 as shown in FIG. Of the two doors 10, 11, the left door 10 on the left side when viewed from the front is rotated to the refrigerator main body 2 by the upper hinge unit 12 and the lower hinge unit (not shown) at the left end of the left door 10. The right door 11 on the right side is supported by the refrigerator main body 2 so that the right end of the right door 11 can be rotated by an upper hinge unit 13 and a lower hinge unit (not shown).

  The front openings of the vegetable compartment 7, the ice making compartment, the upper freezer compartment 8, and the lower freezer compartment 9 are opened and closed by pull-out doors 14, 15, and 16. Storage containers 17, 18, and 19 are provided on the back side of the drawer-type doors 14, 15, and 16.

  Next, the structure of the left and right doors 10 and 11 and the hinge units 12 and 13 in the refrigerator compartment 6 will be described. The left door 10 and the hinge unit 12 that supports the door 10 are different from the right door 11 and the hinge unit 13 that supports the door 11 in size and mounting position with respect to the refrigerator body 2, but the basic configuration is the same. Since they are common, only the right door 11 and the hinge unit 13 will be described here, and detailed descriptions of the left door 10 and the hinge unit 12 will be omitted.

  The right door 11 of the refrigerator compartment 6 shown in FIG. 3 has the glass plate 22 of the outer surface provided so that the front surface of the said right door 11 might be covered entirely. In FIG. 3, the side on which the glass plate 22 is provided is the front side of the right door 11, and the rear side opposite to the glass plate 22 is the rear side of the right door 11 facing the inside of the refrigerator compartment 6.

  An upper door cap 23, a lower door cap 24, a left door cap 25, and a right door cap 26 made of synthetic resin are respectively provided on the upper, lower, left and right outer peripheral portions of the glass plate 22. These four upper, lower, left and right door caps 23, 24, 25, 26 hold and fix the upper, lower, left, and right side surfaces of the glass plate 22 from the upper, lower, left, and right sides, and decorate the four sides of the glass plate 21. Functions as a decoration part.

  On the back side of the glass plate 22 shown in FIG. 3, a door inner assembly 27, which is a rectangular frame, is provided along the outer peripheral portion of the glass plate 22, and the right door 11 is entirely disposed by the door inner assembly 27. Assemble and unite. A rectangular frame 28 is provided on the back side of the door inner assembly 27. Although not shown, an inner plate made of, for example, a steel plate is attached to the frame body 28, and a space between the inner plate and the glass plate 22 is filled with a foam heat insulating material made of foamed urethane or the like. In addition to improving the heat insulation performance, the foam heat insulating material adheres to the inner surface of the glass plate 22 to fix the glass plate 22, and is fixed so that the glass plate 22 does not come off or warp.

  As shown in FIGS. 2 and 4, a concave portion 29 is provided at the right end of the upper door cap 23 so as to be depressed downward and open rearward and rightward. The bottom surface 29a of the recess 29 is connected to the upper surface 26a of the right door cap 26 without a step, and the right door 11 can be rotated by the recess 29 provided in the upper door cap 23 and the upper surface 26a of the right door cap 26. A hinge storage portion 30 is stored that stores a part of the hinge unit 13 to be supported, specifically, a portion protruding forward from the refrigerator main body 2.

  The front side and the right front side of the hinge storage unit 30 are partitioned by an edge wall 33 that protrudes upward from the upper surface edge of the right door 11. The edge wall 33 is divided by a dividing portion 34 in a direction along the upper edge of the right door 11. In this example, the front side of the hinge storage portion 30 is partitioned by a front edge wall 33a that rises above the bottom surface 29a of the recess 29 provided in the upper door cap 23, and the right front portion of the hinge storage portion 30 is the right door cap. 26 is partitioned by a right front edge wall 33b rising upward from the upper surface 26a, and the dividing portion 34 is located on the front side of the right door 11.

  A mounting hole 31 for inserting a cylindrical bush member 40 is formed in the bottom surface 29a of the recess 29 constituting the bottom surface of the hinge storage portion 30 and the top surface 26a of the right door cap 26 so as to straddle the bottom surface 29a and the top surface 26a. It is installed.

  As shown in FIG. 5, a holding cylinder 32 having a cylindrical shape is formed in the attachment hole 31 so as to extend downward from the peripheral edge thereof. The peripheral edge at the upper end of the holding cylinder 32, that is, the opening of the attachment hole 31, forms a stepped portion 31a having an enlarged inner diameter, and the bush flange portion 42 provided at one end of the bush member 40 has a stepped portion 31a. It is designed to fit in. In addition, a plurality of engaging protrusions 31 b that protrude inward are formed on the inner peripheral surface of the other end of the holding cylinder 32.

  As shown in FIG. 6, the bush member 40 is a cylindrical member having a bearing hole 41. One end portion of the bush member 40 has a bush flange portion 42 protruding outward in the radial direction, and the other end portion of the bush member 40 is formed in a gently tapered shape so as to have a small diameter. A claw portion 43 that engages with the engagement protrusion portion 31 b of the holding cylinder 32 is formed in the axially central portion of the bush member 40 so as to protrude outward in the radial direction of the bush member 40. Between the bush brim portion 42 and the claw portion 43 of the bush member 40, a plurality of sets (four sets in the present embodiment) of annular convex portions and concave and convex portions 44 including concave portions therebetween are formed. On the bush collar 42, a convex portion 45 projects upward at a position spaced radially outward from the peripheral edge of the bearing hole 41.

  The bush member 40 is integrally formed together with the bush flange portion 42, the claw portion 43, the concavo-convex portion 44 and the convex portion 45 by a resin harder than the resin constituting the door caps 23, 24, 25, and 26 and having excellent sliding characteristics, for example, polyacetal resin. Is molded. When the bush member 40 is inserted into the attachment hole 31 that opens to the bottom surface of the hinge housing portion 30, the bush member 40 forms a bearing hole 41 on the upper surface of the right door 11, and is located at a position radially outward from the bearing hole 41. A convex portion 45 protruding upward from the bottom surface of the hinge storage portion 30 is formed.

  The convex portion 45 has a surface facing the radially outer side of the bearing hole 41 that forms a contact surface 46 that contacts the edge wall 33 projecting upward from the upper edge of the right door 11. The surface facing the surface forms a friction surface 47 that comes into contact with a hinge portion 60 described later.

  In this example, as shown in FIG. 4, the convex portion 45 is provided across the upper door cap 23 and the right door cap 26, and the contact surface 46 is provided on the edge wall 33 of the right door 11. The front edge wall 33 a of the upper door cap 23 and the right front edge wall 33 b of the right door cap 26 are in contact with each other across the dividing portion 34.

  In this example, as shown in FIG. 5, the contact surface 46 is inclined so as to go radially inward of the bearing hole 41 and away from the edge wall 33 toward the upper end (tip). Accordingly, the convex portion 45 has a lower portion of the contact surface 46 in contact with the edge wall 33, and an upper portion of the contact surface 46 is separated from the edge wall 33.

  The friction surface 47 of the convex portion 45 has a circular arc concentric with the bearing hole 41 and rises perpendicularly to the bottom surface of the hinge housing portion 30, and the hinge portion 60 constituting the right hinge unit 13 is a surface. Contact.

  As shown in FIG. 5, the right hinge unit 13 includes a hinge part 60 that rotatably supports the right door 11 with respect to the refrigerator body 2, and a hinge cover 64 that covers the hinge part 60.

  The hinge portion 60 is formed by molding a metal, for example, a steel plate into a predetermined shape, and is fixed to the right front end portion of the refrigerator main body 2 with a screw or the like, and protrudes forward from the fixing portion 66 to the upper surface of the right door 11. And a support portion 68 accommodated in the provided hinge accommodating portion 30.

  The support portion 68 extends forward from the fixed portion 66 and then bends at right angles to the outside in the width direction (right side). A hinge shaft 70 protruding downward and a hinge flange portion 72 provided at the upper end of the hinge shaft 70 are provided at the tip of the support portion 68.

  The hinge shaft 70 has a cylindrical shape that is rotatably inserted into a bearing hole 41 that opens on the upper surface of the right door 11, and a control device (not shown) provided in the electronic component such as a sensor and the refrigerator body 2. Are connected to the hollow portion 70a of the hinge shaft 70.

  The hinge flange portion 72 extends radially outward from the hinge shaft 70 and has a shape larger than the inner diameter of the bearing hole 41. The hinge flange portion 72 is positioned above the outer side of the bearing portion 41 with the hinge shaft 70 inserted into the bearing hole 41, and the outer peripheral surface 72 a of the hinge flange portion 72 is in surface contact with the friction surface 47 of the convex portion 45. Further, as shown in FIG. 5, the thickness T of the hinge flange portion 72 is provided smaller than the height H at which the convex portion 45 protrudes from the bottom surface of the hinge storage portion 30. As a result, the friction surface 47 of the convex portion 45 is longer in the axial direction of the hinge shaft 70 than the outer peripheral surface 72 a of the hinge flange portion 72.

  More specifically, the planar shape of the hinge flange portion 72 is a curved shape that bulges outward in the width direction in which the radius of curvature increases from the front side of the hinge flange portion 72 through the right side to the rear side (FIG. 7). To FIG. 10). Thereby, the distance from the rotation center of the hinge shaft 70 to the outer peripheral surface 72a of the hinge flange portion 72 is gradually increased from the front side to the rear side of the hinge flange portion 72.

  In the state where the right door 11 is closed as shown in FIG. 7, the hinge flange portion 72 is in surface contact with the friction surface 47 of the convex portion 45 provided on the right door 11 on the front side of the outer peripheral surface 72 a. When the right door 11 rotates counterclockwise (counterclockwise) from the closed state, the friction surface 47 of the convex portion 45 provided on the right door 11 is as shown in FIGS. 8 and 9. It slides on the right side of the outer peripheral surface 72a of the hinge flange portion 72 and moves until it reaches the rear side of the outer peripheral surface 72a of the hinge flange portion 72 shown in FIG.

  In such a configuration, when the right door 11 is rotated in the door opening direction, the friction surface 47 of the convex portion 45 slides from the front side of the outer peripheral surface 72a of the hinge flange portion 72 to the rear side through the right side. In the present embodiment, the distance from the rotation center of the hinge shaft 70 to the outer peripheral surface 72a of the hinge flange portion 72 gradually increases from the front side to the rear side of the hinge flange portion 72.

  Therefore, as shown in FIGS. 7 to 10, when the right door 11 is rotated in the opening direction, the overlapping amount R of the outer peripheral surface 72a of the flange portion 72 and the convex portion 45 increases as the rotation angle increases. Become. Since the resin convex portion 45 is more easily deformed than the metal hinge flange portion 72, the elastic deformation amount of the convex portion 45 increases as the rotation angle of the right door 11 increases and the amount of overlap increases. The frictional force generated between the friction surface 47 of the portion 45 and the outer peripheral surface 72a of the hinge flange portion 72 increases. As a result, even if the user does not hold the right door 11 in the open state, the right door 11 does not open or close without permission, and the open position of the right door 11 can be held. 7-10, the dashed-two dotted line shows the convex part 45 before elastic deformation.

  Further, in the case where the convex portion 45 is separated from the outer peripheral surface 72a of the hinge flange portion 72 in the closed state and is in contact with the outer peripheral surface 72a after the door is opened, the convex portion 45 is the outer peripheral surface of the hinge flange portion 72 when the door is opened In some embodiments, the friction surface 47 of the convex portion 45 contacts the outer peripheral surface 72a of the hinge flange portion 72 not only when the right door 11 is opened but also when the door is closed. Therefore, the left door 11 can be smoothly opened without the convex portion 45 being caught by the hinge flange portion 72.

  Moreover, since the convex portion 45 and the hinge flange portion 72 are in contact with each other outside the bearing hole 41, the inner diameter of the bearing hole 41 into which the hinge shaft 70 is inserted can be reduced, and the heat insulation thickness of the left door 11 can be reduced. Can be secured.

  In the present embodiment, since the friction surface 47 of the convex portion 45 and the outer peripheral surface 72a of the hinge flange portion 72 are in surface contact, even if the thickness T of the hinge flange portion 72 is reduced, the opening position of the right door 11 is maintained. The frictional force required for holding can be obtained between the friction surface 47 and the outer peripheral surface 72, whereby the hinge storage portion 30 can be made small and the heat insulating thickness of the door can be ensured.

  In the present embodiment, since the length H of the convex portion 45 along the axial direction of the hinge shaft 70 is larger than the thickness T of the hinge flange portion 72, the convex portion 45 and the hinge flange portion 72 are caused by component tolerance or assembly tolerance. Even if the position varies, the convex portion 45 and the hinge flange portion 72 can be reliably brought into contact with each other.

  In the present embodiment, as the rotation angle of the right door 11 increases, the amount of overlap between the outer peripheral surface 72a of the flange portion 72 and the convex portion 45 increases, and the hinge shaft 71 radially outwards with respect to the convex portion 45. Although a large pressing force acts, the abutting surface 46 facing radially outward in the convex portion 45 abuts on the edge wall 33 provided on the right door 11, and the pressing force is applied not only to the convex portion 45 but also to the edge wall. 33 is also supported. Therefore, the frictional force generated between the convex portion 45 and the hinge flange portion 72 is increased, and the holding force for holding the right door 11 is improved.

  In addition, since the abutment surface 46 is separated from the edge wall 33 in the upper portion on the distal end side that is easily deformed by the pressing force from the hinge flange portion 72, the edge wall 33 is formed on the protrusion 45 when the door is opened. The edge 33 can be prevented from being deformed without being excessively pressed.

  Furthermore, in this embodiment, the contact surface 46 of the convex part 45 straddles the dividing part 34 provided in the edge wall 33 of the right door 11, and the front edge wall 33 a of the upper door cap 23 and the right front edge of the right door cap 26. Since it is in contact with the wall 33b, the pressing force generated when the door is opened can be distributed to the two edge walls 33a and 33b without being concentrated on either the front edge wall 33a or the right front edge wall 33b. Deformation of the walls 33a and 33b can be suppressed.

  The amount of change in the amount of overlap between the outer peripheral surface 72a of the flange portion 72 and the convex portion 45 with respect to the rotation angle of the right door 11 can be arbitrarily set. For example, the predetermined rotation angle is reached from the closed state. The change amount of the overlap amount may be reduced until the predetermined rotation angle is exceeded, and the change amount of the overlap amount may be increased. When the door is closed, a gasket for sealing between the refrigerator main body and the door is magnetically adsorbed, and the door is locked to a stopper provided in the refrigerator main body 2 to prevent inadvertent opening. However, by reducing the amount of change in the overlap amount from the closed state until the predetermined rotation angle is reached, the resistance at the time of opening the door can be reduced and the usability can be improved.

(Example of change)
In the embodiment described above, the friction surface 47 of the convex portion 45 provided on the right door 11 is provided in a circular arc shape concentric with the bearing hole 41, and the outer peripheral surface 72a of the hinge flange portion 72a is provided in a curved shape with a changing curvature radius. However, the convex portion 45 and the hinge flange 72 may be provided so that the frictional force generated between the friction surface 47 and the outer peripheral surface 72a increases as the rotation angle of the right door 11 increases. The friction surface 47 of the convex portion 45 is provided in a curved shape and the outer peripheral surface 72a of the hinge flange portion 72a is provided in an arc shape, or the friction surface 47 of the convex portion 45 and the outer peripheral surface 72a of the hinge flange 72 are provided in a curved shape. It may be provided.

  In the above-described embodiment, the case where the hinge flange portion 72 and the convex portion 45 are provided on the upper side of the right door 11 has been described. However, the hinge unit is provided on the lower hinge unit of the right door 11 to You may provide the convex part which the overlap amount with the said hinge flange part becomes large in the lower surface of the right door 11 as a rotation angle becomes large.

  In the above-described embodiment, the convex portion 45 is integrally provided on the bush member 40. However, for example, the convex portion 45 may be integrally provided on the upper surface of the upper door cap 23 or the right door cap 26.

  In the above-described embodiment, the friction surface 47 of the convex portion 45 and the outer peripheral surface 72a of the hinge flange 72 are gently curved surfaces. However, as the rotation angle of the right door 11 increases, the friction surface 47 and the outer peripheral surface 72a An uneven shape may be provided on the friction surface 47 and the outer peripheral surface 72a so that the frictional force generated between the two surfaces increases.

  As mentioned above, although embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 2 ... Refrigerator main body, 6 ... Cold room, 10 ... Left door, 11 ... Right door, 12 ... Left hinge unit, 13 ... Right hinge unit, 22 ... Glass plate, 23 ... Upper door cap, 24 ... Bottom Side door cap, 25 ... Left door cap, 26 ... Right door cap, 27 ... Door inner assembly, 29 ... Recess, 30 ... Hinge housing portion, 31 ... Mounting hole, 32 ... Holding cylinder, 33 ... Edge wall, 33a ... Front edge wall, 33b ... Right front edge wall, 34 ... Dividing part, 40 ... Bush member, 41 ... Bearing hole, 42 ... Bush collar part, 43 ... Claw part, 44 ... Uneven part, 45 ... Convex part, 46 ... Abutting Surface, 47 ... friction surface, 60 ... hinge part, 62 ... connecting line drawing part, 64 ... hinge cover, 66 ... fixing part, 68 ... support part, 70 ... hinge shaft, 70a ... hollow part, 72 ... hinge flange part, 72a ... outer peripheral surface

Claims (7)

A refrigerator main body having a storage room, a door for closing the opening provided in the storage room so as to be opened and closed, a bearing hole provided in the door, and a hinge shaft provided in the refrigerator main body, In a refrigerator in which a hinge shaft is rotatably inserted into the bearing hole and rotatably supports the door,
The hinge shaft includes a flange portion that extends radially outward on the outside of the bearing hole,
The door includes a convex portion that contacts the peripheral surface of the flange portion in a state in which the opening is closed, and the peripheral surface of the flange portion and the convex portion overlap when the door is rotated in the door opening direction. A refrigerator that grows in volume.   The refrigerator according to claim 1, wherein the peripheral surface of the flange portion and the convex portion are in surface contact.   The refrigerator according to claim 1, wherein the convex portion has a length along the axial direction of the hinge shaft that is longer than the flange portion. The door includes a cylindrical bush member provided with the bearing portion,
The refrigerator according to any one of claims 1 to 3, wherein the protrusion is integrally provided on the bush member. The door includes an edge wall projecting from a surface where the bearing portion opens at an edge of the door,
The refrigerator according to any one of claims 1 to 4, wherein the convex portion is in contact with the edge wall.   The refrigerator according to claim 5, wherein the convex portion includes a contact surface that contacts the edge wall, and a tip portion of the contact surface is separated from the edge wall. The edge wall is divided in a direction along the edge of the door by a dividing portion;
The refrigerator according to claim 5 or 6, wherein the convex portion is in contact with the edge wall across the divided portion.

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