JP2010101567A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase a drawing amount of a drawer of a freezing compartment or a vegetable compartment of a refrigerator, and to reduce drawing force. <P>SOLUTION: The refrigerator is equipped with: a first roller 17 provided in a neighborhood of a supporting point 21 of a support frame 11 of a drawer door of the freezing compartment or the vegetable compartment; a second roller 19 provided away from a support point 21 of a movable frame 18, a first rail 15 guiding the first roller 17 and linearly extending in a fore and aft direction; and a bent second rail 20 guiding the second roller 19. When the drawer 5 is opened, the support frame 11 and the movable frame 18 form a straight line, and when the drawer 5 is closed, the support frame 11 and the movable frame 18 are mutually bent. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure of a drawer rail that can reduce the opening / closing force of a refrigerator door.

  The refrigerator described in Patent Document 1 is a pair of left and right holding a drawer-type door that closes a front opening of a storage room so as to be freely opened and closed, and a storage container that is fixed to the inner surface of the door and pulled out with the door open. It comprises a support frame and rails arranged on both sides of the storage chamber for slidably supporting the support frame, and the support frame can be folded at its rear part so that it can be folded inward in the storage chamber when closed. A configuration is disclosed in which, when the door is opened, the linear shape is continuous with the front portion and moves forward along the rail.

  In Patent Document 2, the rear end of the support frame provided in the drawer is pivotally coupled, and when the drawer is closed, the rear end is bent upward or laterally, and when the drawer is opened, the drawer is attached to the cabinet. There is disclosed a bottom-mounted drawer guide device that expands the opening amount until it is completely pulled out and suppresses the rail height.

JP 2006-183932 A Special table 2000-501303 gazette

  In recent years, eating habits have changed, and daily foods are often purchased at nearby food stores and cooked, and food is purchased for a week at a suburban large supermarket, etc. Storage has become common. In response to the increase in the use of frozen foods, large refrigerators with a capacity exceeding 400 liters are generally spreading at home.

  However, the amount of food stored with the increase in size of the refrigerator is increased, and for example, food of 20 kg or more is stored in the freezer compartment or vegetable compartment, so that the force to open the doors of the vegetable compartment or freezer compartment increases. There is.

  Refrigerator doors such as vegetable compartments and freezer compartments are provided with support frames provided on the left and right sides of the drawer on body rollers provided on the left and right in the vicinity of the front end of the main body, and a frame provided on the rear end of the support frame. Generally, the roller is moved in the front-rear direction along the rail provided on the main body. In such a configuration, the distance between the main body roller and the frame roller is close when the drawer is fully opened when the pull-out amount is increased. Therefore, the force generated by the weight of the food and the weight of the drawer is enlarged by the principle of the lever and applied to the main body roller and the frame roller, so that the roller load increases, and as a result, the deflection amount of the rail and the support frame and the roller The rolling load increases and the force applied to the opening / closing operation of the drawer increases.

  As another configuration, the rail and the support frame are so-called two-stage rails, and an intermediate support is provided between the rail and the support frame, and the operation load is reduced by adopting a configuration in which each other is supported by a ball bearing. At the same time, the amount of drawer can be increased, but there is a problem that the configuration of the two-stage rail is complicated and expensive.

  As another configuration, a configuration is disclosed in which the rear pieces of the pair of left and right support frames are folded and housed inside the inner wall of the refrigerator body when the door is closed (Patent Document 1).

  In such a configuration, it is desirable to connect the locus of the curved portion with a smooth and large arc in order to bend the rear piece smoothly inward when the door is opened and closed. The part protrudes and the internal volume is reduced. However, no such point is mentioned. Furthermore, when the rear piece is bent, the load on the rotating roller provided on the rear piece remains under the weight of the door and food, so the load for bending is large, and there is a limit to reducing the user's opening / closing operation force. There is.

  As another configuration, a configuration is disclosed in which the rear piece of the pair of left and right support frames is folded and stored above the inner wall of the refrigerator main body when the door is closed (Patent Document 2).

  The ball-shaped rolling body and the cage that holds the rolling body are configured to hold the load while moving along the guide rail, and are provided between the rail and the support frame when the drawer is completely pulled out. A configuration is disclosed in which the load applied to the rolling main body is released by supporting the running rail, which is a support frame, but the load applied to the rolling main body during the opening / closing operation of the drawer is not described. Although it is stated that the control roller supports the load during the opening / closing operation of the drawer, the load applied only to the rolling body is applied only to the control roller. There is no mention that the loaded roller switches. Furthermore, in order to be suitable for mounting on the bottom surface of the drawer, the shape of the leg of the guide rail is defined as a configuration that reduces the height even if the width of the rail is widened. Conversely, if the drawer rail is provided between the side surface of the food container and the inner side surface of the main body as in the refrigerator, the rail is less restricted in height, but the configuration in which the width dimension is reduced is desirable.

  Therefore, an object of the present invention is to provide a refrigerator capable of reducing the load of opening / closing operation of the drawer door.

  In order to achieve the above object, the present invention is characterized by a refrigerator main body provided with a storage chamber inside, a drawer-type door that opens and closes an opening provided in the front of the storage chamber in the front-rear direction, and A pair of support frames provided on the left and right sides of the door and extending in the front-rear direction from the door toward the inner surface of the storage chamber, and a movable frame provided at the rear end of the support frame so as to be rotatable and bendable around a fulcrum. A first roller (frame roller) provided in the vicinity of the fulcrum of the support frame, a second roller (rear roller) provided far from the fulcrum of the movable frame, and the refrigerator A first rail provided linearly in a front-rear direction in which the first roller (frame roller) is guided; and a side wall of the refrigerator main body that is above the first rail. A second rail provided, and The two rails include a first passage portion provided in the same direction as the first rail, and a second passage portion disposed on the deeper side of the refrigerator body than the first passage portion and turning upward, A first support form in which the rail and the first roller are in contact with each other to support the door, and the first rail and the first roller are separated from each other, and the second rail and the second roller are in contact with each other. The door is supported by any one of the second support forms for supporting the door.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which can reduce the load of the opening / closing operation | movement of a drawer door can be provided.

  FIG. 1 is an overall perspective view of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the refrigerator according to an embodiment of the present invention. 3 to 5 are sectional views for explaining the force applied to the roller when the drawer is pulled out, and FIG. 6 is a schematic graph for explaining the relationship between the opening amount A of the drawer and the reaction forces P1 and P2 applied to the roller. .

  In FIG. 1 and FIG. 2, the refrigerator main body 1 is divided into a plurality of storage rooms, and the uppermost part is a refrigerator compartment 2. In this embodiment, a so-called French door that opens to the left and right sides is used as the door of the refrigerator body 1. The lower side of the refrigerator compartment 2 is a storage room divided into left and right, for example, one of which is a function switching room 3, and the other is an accumulator for taking out ice produced by an automatic ice making device (not shown). It is an ice making room 4.

  Furthermore, the lower part is a freezer compartment 5 provided with a drawer door that can be pulled out and opened to the front, and the lowermost stage is a vegetable compartment 6 provided with a drawer door.

  Hereinafter, the structure of the door support rail will be described using the freezer compartment 5 as an example with reference to FIGS. 3 to 5.

  The front surface of the freezer compartment 5 has an open opening, and this opening is covered with a door 5a so as to be freely opened and closed. The door 5a is provided with a support frame 11 extending toward the inside (back side) of the freezer compartment 5, and the support frame 11 holds a container 12 for storing food. A main body roller 16 is rotatably provided in the vicinity of the opening of the freezer compartment 5 of the refrigerator main body 1. Further, in the freezer compartment 5 of the refrigerator body 1, a first rail 15 extending from the open part toward the inside (back side) is provided. A closer (not shown), which is a closing urging means for drawing the freezer compartment 5 in the closing direction, is provided on the back side of the first rail 15. At the end of the support frame 11 on the side opposite to the door body, a frame roller 17 that is pivotally supported is provided. Assuming that the distance from the door 5a to the main body roller 16 is an opening amount A, when the opening amount A becomes 50 mm or less when the freezing chamber 5 is once opened, the support frame 11 is moved to the back side by the force of a spring (not shown). The door is closed until the magnet packing 14 provided on the entire circumference of the freezer compartment 5 is attracted to the refrigerator body 1 by applying a pulling force and assisting the operation of closing the freezer compartment 5.

  Next, the force applied to the roller that supports the drawer will be described with reference to FIGS. 3 is a state in which the drawer is slightly opened, FIG. 4 is a position in which the center of gravity of the drawer is directly above the main body roller 16, and FIG. 5 is a longitudinal sectional view illustrating a state in which the drawer of the freezer compartment 5 is pulled out to the maximum. . Support frames 11 are provided on both the left and right sides of the door body 5a. A frame roller 17 is provided in the vicinity of the back end of the support frame 11, and the frame roller 17 is a groove provided on the inner wall of the side surface of the main body. It is fitted to the first rail 15 and supported so as to be movable in the front-rear direction. A main body roller 16 is provided in the vicinity of the opening provided on the front surface of the refrigerator and on both sides of the inner wall of the main body side surface, and the support frame 11 is placed on the main body roller 16 and supported so as to be movable in the front-rear direction. .

  The door body 5a is supported by the main body roller 16 and the frame roller 17 together with the container 12 and the support frame 11 so as to be movable in the front-rear direction while supporting the load.

  When the gravity center of the food stored in the door 5a, the support frame 11, the container 12, and the container 12 is G, the mass is m, and the gravitational acceleration is g, the weight mg is generated downward at the position of the gravity center G. Here, the distance between the body roller 16 and the position of the center of gravity G is L1, the reaction force generated on the body roller 16 is P1, the distance between the body roller 16 and the frame roller 17 is L2, and the reaction force generated on the frame roller 17 is P2. . In FIG. 3, the position of the center of gravity G is between the main body roller 16 and the frame roller 17 and supports its own weight mg by both the reaction force P1 and the reaction force P2.

mg = P1 + P2 (1)
And both P1 and P2 are smaller than the own weight mg.
From moment balance P2 x L2 = mg x L1 (2)
P2 = mg × (L1 / L2) (3)
P1 = mg × (1−L1 / L2) (4)
It becomes.

In FIG. 4, since the position of the center of gravity G is located immediately above the main body roller 16, all of its own weight mg is added to the main body roller 16, and P1 = mg (5)
And
P2 = 0 (6)
It becomes.

FIG. 5 shows a state in which the drawer is fully opened. However, since the position of the center of gravity G moves to the left of the main body roller 16 in the drawing, the reaction force P2 of the frame roller 17 is downward as opposed to FIG. From the balance of power, P1 = mg + P2 (7)
From moment balance P2 × L2 = mg × L1 (8)
From (8) P2 = mg × (L1 / L2) (9)
Substituting into (7), P1 = mg × (1 + L1 / L2) (10)
It becomes.

  In the state of FIG. 5, since L1> L2, both P1 and P2 are larger than the own weight mg.

  FIG. 6 shows the relationship between the opening amount A and the reaction forces P1 and P2 explained by the above formula. The horizontal axis is the opening amount A, and the vertical axis is the reaction force. The left end is the drawer closed, the right end is fully open. When the opening amount A is equal to the distance A ′ between the center of gravity G and the door body 5a, and the center of gravity G is located immediately above the main body roller 16 as shown in FIG. 4, the reaction force P1 is equal to its own weight mg, The reaction force P2 is zero. In FIG. 6, on the left side of the distance A ′ between the center of gravity G and the door body 5a, the reaction forces P1 and P2 are both smaller than the own weight mg, and the right side of the distance A ′ between the center of gravity G and the door body 5a with the increased opening amount A. Then, since L1 increases and L2 decreases, the reaction force increases. Here, when the reaction forces P1 and P2 increase, the rotational loads of the main body roller 16 and the frame roller 17 increase, and the first rail 15 and the support frame 11 are bent by the load, and the opening / closing force of the user further increases due to the deformation. There is a problem. Therefore, it is effective to reduce the load in the vicinity of the fully open position of the drawer in order to reduce the opening / closing force of the user.

  Since both the expressions (9) and (10) are L2, that is, the distance between the main body roller 16 and the frame roller 17 is in the denominator, the reaction forces P1 and P2 can be reduced by increasing L2.

  On the other hand, it is desirable to increase the opening amount A in order to improve the convenience of taking in and out the food. For this purpose, it is necessary to reduce the L2 dimension, but this increases the opening / closing force. That is, the increase in the opening amount A and the reduction in the load on the roller are contradictory characteristics, and the opening / closing load tends to increase particularly when the drawer is fully opened.

  In the present invention, a drawer rail support structure capable of increasing the opening amount A and reducing the load of the roller is realized, and an example of the configuration will be described with reference to FIGS. 7 to 15 and FIGS. 25 to 28. To do. FIG. 25 is a view of the state of the rails and rollers in the second support form as seen from the front of the refrigerator. FIG. 26 is a perspective view showing a state when the door body is fully closed, and FIG. 27 is a perspective view showing a state when the door body is fully opened. FIG. 28 is an exploded perspective view of the door body and the main body rail.

  12 and 13 are partial views showing the support frame 11, the movable frame 18, and the contact portion 23. FIGS. 14 and 15 are partial views for explaining the step portion 24 of the first rail 15. FIG. Shows a first support form to be described later, and FIG. 15 shows a second support form.

  FIG. 7 is a longitudinal sectional view showing a state in which the drawer is closed. In FIG. 7, a main body roller 16 is provided in the vicinity of the drawer opening of the refrigerator main body 1, and a first rail 15 is provided on the inner wall side surface in the front-rear direction, which is the movement direction of the drawer. A support frame 11 extends backward on the door body 5a of the freezer compartment 5, and a frame roller 17 is provided at the rear end thereof. The frame roller 17 is fitted to the first rail 15 and supported so as to be movable in the front-rear direction. ing. The support frame 11 is placed on the main body roller 16.

  The support frames 11 are provided on the left and right sides of the door body 5a, and the rear sides (back sides) of the left and right support frames 11 are connected by a connecting member 30 (see FIGS. 26 to 28). A stepped portion 24 is provided on the upper surface of the first rail 15, and as shown in detail in FIGS. 14 to 15, a first surface 15 a close to the opening and a second surface 15 b far from the opening The first surface 15a is located above the second surface 15b. Within the range of the second surface 15b, the height of the first rail 15 is substantially equal to the diameter of the frame roller 17, and within the range of the first surface 15a, the height dimension of the first rail 15 is greater than the diameter of the frame roller 17. Is set large, and a gap is provided between the frame roller 17 and the upper side. Thereby, the drawer is opened, and the height position of the roller is changed when the support form is changed. Moreover, the same effect is anticipated by making the height dimension of a 1st rail into the rail structure which makes a refrigerator front side part wider than a refrigerator back side part. The same effect can be expected by a rail structure in which the height dimension of the first rail changes when the first support form changes to the second support form.

  A fulcrum 21 is provided behind the support frame 11, and a movable frame 18 that is a movable frame is supported so as to be rotatable around the fulcrum. The movable frame 18 can rotate between a position extending linearly with the support frame 11 and a bent position bent upward as shown by a broken line 18 'in FIG. A rear roller 19 is provided behind the movable frame 18, and the rear roller 19 is fitted and slid to a second rail 20, which is a groove provided on the inner wall side surface of the refrigerator main body separately from the first rail 15. This is a possible configuration. The second rail 20 is provided substantially parallel to the upper side of the first rail 15 (straight line portion 20c), and the rear end portion thereof includes a storage portion 20a that continuously extends upward through the curved portion 20b. The straight portion 20c is a first passage portion, and the curved portion 20b and the storage portion 20a are second passage portions.

  When the door 5a is closed, as shown in FIG. 12, the movable frame 18 is bent upward around the fulcrum 21 along the storage portion 20a, and the contact portions 23 and 23 are separated from each other. is doing. Here, the dead weight of the door body 5a and food is supported by the main body roller 16 and the frame roller 17, and the rear roller 19 is freely rotated around the fulcrum 21 and is not loaded. That is, the support frame 11 and the movable frame 18 which is a movable frame are bent, and the first first rail 15 and the frame roller 17 which is a first roller are in contact with each other to support the door. It has become.

  The spring 22 is stretched between the support frame 11 and the movable frame 18 and applies a rotational force that further rotates the movable frame 18 around the fulcrum 21 in the CCW (Counter Clock Wise) direction. .

  As shown in FIG. 8, when the drawer starts to open, the support frame 11 moves to the left in the figure, so that the fulcrum 21 also moves to the left, and the rear roller 19 moves downward along the storage portion 20a of the second rail 20. To do.

  When the drawer is further pulled out to the left and reaches the position shown in FIG. 9, the rear roller 19 is pulled out to the left together with the support frame 11 and passes through the curved portion 20 b of the second rail 20 to the straight portion of the second rail 20. The movable frame 18 moves and becomes linear with the support frame 11. At this time, the support frame 11 and the movable frame 18 are brought into contact with each other at the contact portion 23 as shown in FIG. 13, so that the linear position can be maintained and the reaction force P2 ′ can be supported. Here, in the state as shown in FIG. 13, the rear roller 19 must be able to support the downward reaction force P <b> 2 ′. Therefore, it is desirable that the abutting portion 23 is pressed below the fulcrum 21.

  That is, when the support frame 11 and the movable frame 18 are linear, the reaction force P2 ′ can be supported, and the movable frame 18 can be bent on the side opposite to the load.

  In the state of FIG. 9, the position of the frame roller 17 is on the right side of the step portion 24 provided on the first rail 15, and the height of the groove of the first rail 15 is substantially equal to the diameter of the frame roller 17. The upper surface of the roller 17 is in contact with the second surface 15 b of the first rail 15, and a reaction force P <b> 2 is generated in the frame roller 17. That is, the lower surface of the frame roller 17 is lifted from the first rail 15 and is in a state where no reaction force is generated. This is the same form as FIG.

  When the door 5a is further pulled out to the left in the drawing and the frame roller 17 is moved to the left of the stepped portion 24 provided on the first rail 15, FIG. 10 shows the height of the rail groove on the first surface 15a. Since the diameter is larger than the diameter of the frame roller 17, not only the lower surface but also the upper surface does not contact the rail. The state is shown in FIG.

  In that case, the reaction force P <b> 2 becomes a reaction force P <b> 2 ′ acting on the rear roller 19 provided on the movable frame 18. That is, the support frame 11 and the movable frame 18 are linear, and the second rail 20 and the rear roller 19 as the second roller come into contact with each other to support the door. Then, the distance from the position L2 ′ to the rear roller 19 to the position L2 ′ to the rear roller 19 from the distance L2 to the frame roller 17 is the distance from the position of the main body roller 16 to which the reaction force P1 acts to the position to which the reaction force P2 ′ acts. Increases by 18 lengths. Then, as shown in the equations (9) and (10), since the denominator becomes large, the reaction forces P1 and P2 applied to the roller become small. As a result, the rotational load of the roller becomes small and the reaction force generated on the rail also becomes small. Since the deformation of the roller is reduced, the roller rolls smoothly and the opening / closing operation of the drawer is performed smoothly.

  Further, FIG. 11 shows a state in which the door 5a is fully opened. The frame roller 17 has moved until it comes close to the main body roller 16, and L2 is small. However, since the reaction force P2 'is generated in the rear roller 19, L2' is larger than L2, so the reaction forces P1 and P2 are increased. There is an effect that can be reduced.

  If the door 5 a is closed without bending the movable frame 18, the movable frame 18 ′ and the rear roller 19 ′ have a dimensional relationship that protrudes to the outside of the freezer compartment 5 as indicated by a broken line in FIG. 7. However, it becomes possible to store in the freezer compartment 5 by bending. That is, since the length of the support frame 11 is equivalent to the length of the movable frame 18, the opening amount A of the drawer door can be increased, which is convenient and convenient.

  Since the rear roller 19 is bent upward from the support frame 11 in the first support form, the second rail 20 and the storage portion 20a are disposed above the first rail 15 so that the first rail 15 This is convenient because the second rail 20 does not interfere with each other.

  It is clear from formulas (9) and (10) that the effect of increasing the L2 dimension is greater in reducing the reaction forces P1 and P2, and therefore the configuration in which the length of the movable frame 18 is increased. Is more desirable. Therefore, by disposing the support frame 11 and the first rail 15 in the vicinity of the bottom surface of the door body 5a, the length of the movable frame 18 can be set within a range not contacting the ceiling of the freezer compartment 5 when bent as shown in FIG. Since it can be made longer, it is more effective. It is more effective to arrange the positions of the support frame 11 and the first rail 15 downward until the main body roller 16 comes into contact with the bottom surface of the freezer compartment 5 or is partially embedded.

  Next, the operation when closing the drawer will be described.

  If the drawer is sequentially closed from the fully opened position shown in FIG. 11 to the position shown in FIGS. 11 to 7, the reaction force P2 'generated in the rear roller 19 contrary to the opening, the frame roller 17 is applied to the first rail 15 After the stepped portion 24 is crossed from the left side to the right side of the drawing in the second support form shown in FIGS. 10 to 15, the frame roller 17 is changed to the first support form shown in FIGS. 9 to 14. Therefore, the movable frame 18 can freely rotate around the fulcrum 21 because the reaction force P2 is generated and no reaction force is generated on the rear roller 19. 9 to FIG. 8 in which the drawer is further closed, the rear roller 19 moves rearward along the second rail 20 and rotates around the fulcrum 21 when passing through the arcuate curved portion 20b. It is bent upward and introduced into the storage portion 20a, and is rotated and stored upward in the space of the freezer compartment 5 as shown in FIGS.

  Since the second rail 20 and the storage portion 20a are provided on the upper portion of the first rail 15 provided in the space between the container 12 and the freezer compartment 5, the second rail 20 and the storage portion 20a are provided. However, since the width of the rail does not increase, it is not necessary to reduce the width of the container 12, and it is convenient because the space in the vegetable compartment or the freezer compartment can be used efficiently.

  Here, in either case of opening and closing of the drawer, in the range from FIG. 7 to FIG. 9 in which the movable frame 18 rotates, the frame roller 17 and the first rail 15 abut against each other to generate a reaction force. Since no reaction force is generated on the roller 19, almost no rotational load is generated when the movable frame 18 rotates. Therefore, the fulcrum 21 does not require any particular lubrication, and a simple and highly reliable configuration can be realized.

(Retraction by spring)
Next, the action and effect of the spring 22 will be described. As already described, the spring 22 is stretched between the support frame 11 and the movable frame 18, and generates a moment for rotating the movable frame 18 in the illustrated CCW direction to apply a force in a direction to bend the movable frame 18. . When the rear roller 19 moves upward along the second rail 20 to the storage portion 20 along the second rail 20 as shown in FIGS. 8 to 7 when the door is closed, the support frame 11 is pulled by the pulling force of the spring 22. Since it is pulled to the movable frame 18 side, a force in the direction in which the door 5a is closed is generated. That is, it is convenient because the movable frame 18 bends upward when the door 5a is closed and the drawer is automatically closed by the spring force.

(Explanation of operational force reduction)
With reference to FIG. 16, the effect of reducing the load on the roller when the drawer is opened and closed in the refrigerator according to the present invention will be described. FIG. 16 is a graph showing the reaction force P1 applied to the main body roller 16 during a series of drawer opening / closing operations from FIG. 7 to FIG. Similarly to FIG. 6, in the state where the opening amount A is equal to the distance A ′ between the center of gravity G and the door body 5a, the reaction force P1 is equal to the own weight mg. The fully closed state is minimum, and the reaction force P1 increases from the left end of the graph toward the right side as the drawer is opened. The opening amount when moving from the first support form shown in FIG. 9 to the second support form shown in FIG. 10 is A ″, and the reaction force immediately before moving from the first support form to the second support form Is P1 ′, and the reaction force immediately after is P1 ″. In a state where the opening amount A is equal to A ″, the reaction force P2 shifts from the frame roller 17 to the rear roller 19, so that the distance L2 shown in FIG. 10 is suddenly increased to the distance L2 ′. In (10), since L2 increases, the reaction force P1 decreases and changes from P1 ′ to P1 ″. When the opening operation is continued, the reaction force P1 increases and reaches the fully open position. If the first support form is maintained and the valve is fully opened, the reaction force P1 increases as shown by a broken line 27 and reaches a virtual maximum value 28. However, by shifting to the second support form as in the present invention, the reaction force P1 increases as shown by the solid line 29, reaches the maximum value 30, and becomes smaller than the virtual maximum value 28. If the maximum value 30 of the reaction force is small, the frictional force generated in proportion to the reaction force is also reduced, and the opening / closing operation force is reduced. Further, since the bending deformation of the support frame 11 and the rail caused by the load is reduced, the extra operation resistance caused by the deformation of the contact state between the roller and the rail can be reduced, which is effective.

(Other examples)
Another embodiment will be described with reference to FIGS. FIGS. 17 and 18 show another configuration of the contact portion 23 described in FIGS. 12 and 13. In the second support mode, the support frame 11 and the movable frame 18 are linear. This is an example of a configuration in which the contact portion 23 is substantially parallel to the support frame 11 and faces in the same direction.

  Still another embodiment will be described with reference to FIGS. 19 to 24 are schematic views showing the relationship among the door body 5a, the support frame 11, the movable frame 18, and the rail 31 when the drawer is opened from fully closed to fully open. In FIG. 19, the diameter of the frame roller 17 is smaller than the height of the rail 31, and a backlash is provided with respect to the rail 31. The diameter of the rear roller 19 provided on the movable frame 18 is substantially equal to the height of the rail 31 and moves along the rail 31. The diameter of the frame roller 17 is smaller than the diameter of the rear roller 19. Both the frame roller 17 and the rear roller 19 are configured to move along the rail 31. The rail 31 extends horizontally, the back side is a storage portion 31a and is bent upward, and is smoothly connected by the horizontal portion and the curved portion 31b. The own weight mg is supported by the body roller 16 and the frame roller 17, and the frame roller 17 contacts the rail 31 on the lower side to support the upward reaction force P <b> 2 downward, and there is a gap between the rail 31 on the upper side. Arise.

  When the drawer starts to open, the support frame 11 moves to the left as shown in FIG. 20, the movable frame 18 rotates around the fulcrum 21, and the rear roller descends along the storage portion 31 a of the rail 31. Further, FIG. 21 shows a state in which the drawer is opened. The rear roller 19 reaches the rail 31 extending horizontally through the curved portion 31b, and the support frame 11 and the movable frame 18 are linear. This is the state described in FIG.

  As shown in FIG. 22, when the door is further opened and the opening amount A is equal to the distance A ′ between the center of gravity G and the door body 5a, and the center of gravity G is located immediately above the main body roller 16, all of its own weight mg is applied to the main body roller 16. In addition, the magnitude of the reaction force P1 becomes equal to mg.

  As shown in FIG. 23, when the drawer is further opened and the position of the center of gravity G moves to the left of the main body roller 16 in the drawing, the entire drawer tends to move down on the left side and up on the right side of the main body roller 16. Here, since the diameter of the frame roller 17 is smaller than that of the rail 31, the frame roller 17 is lifted from the rail 31 and cannot support the reaction force. On the other hand, the diameter of the rear roller 19 is substantially the same as that of the rail 31, and the support frame 11 and the movable frame 18 are already linear, and the abutting portion 23 abuts to support the reaction force, so the reaction force P2 is applied to the rear roller 19. Can be generated to support the drawer. Further, FIG. 24 shows a state in which the drawer is opened to the fully open position. The reaction forces P1 and P2 are generated in the same manner as in FIG. 23, and in FIGS. 5 and 11, it is clear that the drawer can be supported. is there.

  As shown in FIGS. 17 and 18, the spring 22 is stretched between the support frame 11 and the movable frame 18, so that when the drawer is closed, the rotational force in the CCW direction is applied as described in FIG. 7. When the movable frame 18 is bent and stored in the storage portion 31a while being bent, it can be automatically closed by applying a force to close the drawer.

  Since the storage portion 31a and the bending portion 31b of the rail 31 are provided on the upper portion of the rail 31, the width of the container 12 does not increase even when the storage portion 31a and the bending portion 31b are provided. There is no need to reduce the size, and the space in the vegetable compartment or the freezer compartment can be used efficiently, which is convenient.

(effect)
According to this embodiment, even if the opening amount A of the refrigerator drawer door is increased, the roller that receives the load can be switched, and the load applied to the roller and the rail can be reduced. It is possible to open and close the door and to automatically close the door from the state of closing the door, thereby improving the energy saving effect.

  Moreover, since the width of the rail is not increased, it is not necessary to reduce the width of the food container, and it is convenient because the space in the vegetable compartment or the freezer compartment can be used efficiently.

  In addition, although only the Example about the case of the drawer of a refrigerator was shown in the present Example, it is not limited to a refrigerator, It is possible to deform | transform and apply to drawer-type doors, such as a cabinet in which documents etc. are put. .

The perspective view which shows the structure of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of a refrigerator. The longitudinal cross-sectional view which shows the structure of the drawer door of a refrigerator. The longitudinal cross-sectional view which shows the structure of the drawer door of a refrigerator. The graph which shows the reaction force of the roller part of the drawer door of a refrigerator. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. Schematic which shows the structure of the support frame of the refrigerator by this invention. Schematic which shows the structure of the support frame of the refrigerator by this invention. Schematic which shows the 1st support form of the refrigerator by this invention. Schematic which shows the 2nd support form of the refrigerator by this invention. The graph which shows the reaction force of the roller part of the drawer door of the refrigerator by this invention. Schematic which shows another structure of the support frame of the refrigerator by this invention. Schematic which shows another structure of the support frame of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The longitudinal cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The cross-sectional view which shows the structure of the drawer door of the refrigerator by this invention. The perspective view which shows the structure of the drawer door of the refrigerator by this invention. The perspective view which shows the structure of the drawer door of the refrigerator by this invention. The perspective exploded view which shows the structure of the drawer door of the refrigerator by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Refrigerating room 3 Function switching room 4 Ice making room 5 Freezing room 6 Vegetable room 11 Support frame 12 Container 14 Magnet packing 15 First rail 16 Main body roller 17 Frame roller 18 Movable frame 19 Rear roller 20 Second rail 20a, 31a Storage part 20b, 31b Curved part 21 Support point 22 Spring 23 Contact part 24 Step part 31 Rail

Claims (13)

A refrigerator body provided with a storage chamber inside, a drawer-type door that opens and closes an opening provided in the front of the storage chamber in the front-rear direction, and a pair of doors provided on the left and right of the door from the door to the back of the storage chamber A support frame extending in the front-rear direction, and a movable frame provided at the rear end of the support frame so as to be rotatable and bendable around a fulcrum, and provided near the fulcrum of the support frame. A first roller, a second roller provided far from the fulcrum of the movable frame, and a side surface of the inner wall of the refrigerator main body, which is linearly provided in the front-rear direction in which the first roller is guided. A first rail, and a second rail provided on the inner wall side surface of the refrigerator main body and above the first rail,
The second rail includes a first passage portion provided in the same direction as the first rail, and a second passage portion disposed on the deeper side of the refrigerator body than the first passage portion and turning upward.
The first rail and the first roller are in contact with each other to support the door, the first rail and the first roller are separated from each other, and the second rail and the second roller are separated from each other. The refrigerator is characterized in that the door is supported by any one of a second support form that contacts and supports the door.   The refrigerator according to claim 1, wherein the second support form supports the door by contacting the first passage portion and the second roller. The first support form is a state in which the opening of the refrigerator body is closed with the door, and the movable frame is bent with respect to the support frame in the first support form.
The second support form is a state in which the door is pulled out to open the opening of the refrigerator body, and in the second support form, the support frame and the movable frame are linear. The refrigerator according to claim 1 or 2.   When the support frame and the movable frame are bent, they are separated from each other, and when the support frame and the movable frame are linear, they contact each other and receive the load together with the fulcrum. The refrigerator according to any one of claims 1 to 3, wherein the refrigerator is provided on a frame and the movable frame.   5. The distance from the door to the roller receiving the load is changed by the conversion to the first support form or the second support form. 6. Refrigerator. When converted from the first support form to the second support form, the distance from the door to the roller receiving the load becomes longer,
The refrigerator according to any one of claims 1 to 5, wherein a distance from the door to the roller receiving the load is shortened when the second support form is converted to the first support form.   The refrigerator according to any one of claims 1 to 6, wherein the height of the first rail is wider on the front side of the refrigerator body than on the back side of the refrigerator body. A refrigerator main body with a storage room inside, a drawer-type door that opens and closes an opening provided in the front of the storage room in the front-rear direction, and a pair of doors provided on the left and right of the door from the door to the back of the storage room. A support frame extending in the front-rear direction, a movable frame provided at the rear end of the support frame so as to be rotatable and bendable around a fulcrum, and a first frame provided in the vicinity of the fulcrum of the support frame. A roller, a second roller provided far from the fulcrum of the movable frame, and a bent rail that guides both the first roller and the second roller on the inner wall side surface of the refrigerator body,
The bending rail includes a first passage portion provided in the same direction as the support frame, and a second passage portion disposed on the deeper side of the refrigerator body than the first passage portion and turning upward.
A diameter of the first roller is smaller than a diameter of the second roller, a third support form in which the first passage portion and the first roller are in contact with each other to support the door; The passage portion and the first roller are separated from each other, and the first passage portion and the second roller are in contact with each other, and the door is supported in any form of the fourth support form for supporting the door. Refrigerator. The third support form is a state in which the opening of the refrigerator body is closed with the door, and the movable frame is bent with respect to the support frame in the third support form,
The fourth support form is a state in which the door is pulled out to open the opening of the refrigerator body, and in the fourth support form, the support frame and the movable frame are linear. The refrigerator according to claim 8.   When the support frame and the movable frame are bent, they are separated from each other, and when the support frame and the movable frame are linear, they contact each other and receive the load together with the fulcrum. The refrigerator according to claim 8 or 9, wherein the refrigerator is provided on a frame and the movable frame.   The distance from the door to the roller that receives a load is changed by the conversion to the form of the third support form or the fourth support form. Refrigerator. When converted from the third support form to the fourth support form, the distance from the door to the roller receiving the load becomes longer,
The refrigerator according to any one of claims 8 to 11, wherein a distance from the door to a roller receiving a load is shortened when converted from the fourth support form to the third support form.   An elastic member is provided between the support frame and the movable frame to urge the force from a position where the movable frame is bent toward the support frame, and the movable frame is supported by the movable frame. The refrigerator according to any one of claims 1 to 12, wherein a force in a direction to close the door is applied to the support frame by an urging force generated by the elastic member in a range bent with respect to the frame.

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