JP6486791B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator in which a storage case can be taken in and out together with a door that opens and closes a storage chamber.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator has a heat insulation box which fills a foam heat insulating material between an inner box having an opening on the front and an outer box covering the outside of the inner box to form a storage room. The front surface of the storage chamber is opened and closed by a drawer-type door, and the door is provided with a frame extending rearward from the left and right ends. The frame supports a storage case for storing stored items. Thereby, a storage case is integrated with a door. A moving roller supported by a horizontal shaft is provided at the rear end of the frame.

  Fixed rails extending in the front-rear direction are attached to both side walls of the inner box of the storage chamber. The fixed rail is formed in a U-shaped cross section having an opening on one side surface (inner surface), and guides the moving roller of the frame. The outer peripheral surface of the moving roller is inclined in a direction away from the horizontal inner surface of the fixed rail as it goes from the axial center to both sides.

  In the refrigerator having the above configuration, when the door is pulled forward, the moving roller of the frame rolls on the fixed rail to open the front surface of the storage chamber, and the storage case is pulled forward together with the door. Thereby, the user can take in and out the stored item with respect to the storage case.

Japanese Patent Laid-Open No. 2002-22354 (page 3, page 4, FIG. 1, FIG. 4)

  However, according to the conventional refrigerator, the outer peripheral surface of the moving roller is inclined in a direction away from the inner surface of the fixed rail as it goes to both sides from the center in the axial direction. For this reason, when the moving roller rolls on the inner surface of the fixed rail, stress concentrates on the inner surface of the fixed rail due to the axial central portion of the outer peripheral surface of the moving roller, and the fixed rail may be damaged. Therefore, there was a problem that the usability of the refrigerator deteriorated.

  An object of this invention is to provide the refrigerator which can improve usability.

In order to achieve the above object, the present invention provides:
A door that opens and closes the storage chamber, a frame that extends rearward from the left and right ends of the door, a moving roller that includes a ball bearing that is pivotally supported on the rear portion of the frame, and that extends back and forth on both side walls of the storage chamber A refrigerator provided with a fixed rail and a storage case supported by the frame, wherein the moving roller rolls on the fixed rail and the storage case is integrated with the door;
The fixed rail has a parallel upper rail and a lower rail arranged side by side, and a rolling surface of the moving roller is formed by a cylindrical surface, with respect to an axial center of the rolling surface of the moving roller. The center of the ball of the moving roller is arranged outside in the axial direction.

  According to this configuration, when the detached door is pushed into the storage chamber, the moving roller of the frame slides along the fixed rail. When the door is further pushed in this state, the door comes into contact with the peripheral edge of the front opening of the storage chamber and the front surface of the storage chamber is closed. When the door is pulled forward, the moving roller rolls on the fixed rail to open the front surface of the storage chamber, and the storage case is pulled forward together with the door.

  Further, in the refrigerator having the above-described configuration, the stationary roller includes a fixed roller that is supported on both side walls by a horizontal shaft and guides the frame, and a rolling surface of the fixed roller is formed by a cylindrical surface, and the fixed roller The rolling surface is preferably longer in the axial direction than the rolling surface of the moving roller.

  In the refrigerator having the above-described configuration, the refrigerator includes a fixed roller that includes a ball bearing that is pivotally supported on both the side walls, and that guides the frame. A rolling surface of the fixed roller is formed by a cylindrical surface, and the fixed It is preferable that the center of the ball of the fixed roller is arranged on the inner side in the axial direction with respect to the axial center of the rolling surface of the roller.

  In the refrigerator having the above-described configuration, the present invention further includes a connecting member that connects rear portions of the left and right frames, and the frame and the connecting member are provided with a first insertion hole and a second insertion hole, respectively, The inner ring portion has an insertion portion that protrudes inward and is inserted through the first insertion hole and the second insertion hole, and a diameter-enlarged portion that expands the tip of the insertion portion, and the seating surface of the insertion portion and the expansion portion It is preferable that the frame and the connecting member are sandwiched by the diameter portion.

  According to the present invention, since the rolling surface of the moving roller composed of the ball bearing is formed by the cylindrical surface, the contact area between the moving roller and the fixed rail can be increased. For this reason, the concentration of stress on the fixed rail by the moving roller can be reduced, and damage to the fixed rail can be prevented. Therefore, the usability of the refrigerator can be improved.

  Further, the center of the ball is arranged on the outer side in the axial direction with respect to the axial center of the rolling surface of the cylindrical surface of the moving roller. As a result, when the left and right moving rollers are in contact with the upper rail by the weight of the storage case pulled forward and tilted in a C shape, the rolling surface of the cylindrical surface and the upper rail come into contact with each other at a position close to the ball. Touch. For this reason, the moving roller can roll even if the position where the moving roller receives the load from the upper rail approaches the surface on which the ball turns, and the force pushing the door is small. Therefore, even if the weight of the storage case increases due to the stored items, the door can be easily closed, and the usability of the refrigerator can be further improved.

The perspective view which shows the inside of the refrigerator of 1st Embodiment of this invention. Sectional drawing on the right side showing the main part of the refrigerator according to the first embodiment of the present invention. Top surface sectional drawing which shows the principal part of the refrigerator of 1st Embodiment of this invention. Front sectional drawing which shows the moving mechanism of the door of the freezer compartment of the refrigerator of 1st Embodiment of this invention. Front sectional drawing which shows the fixed rail of the door of the freezer compartment of the refrigerator of 1st Embodiment of this invention. Top sectional drawing which shows the rear part of the flame | frame of the left side of the door of the freezer compartment of the refrigerator of 1st Embodiment of this invention. Front sectional drawing which shows the fixed roller of the moving mechanism of the door of the freezer compartment of the refrigerator of 1st Embodiment of this invention. Front sectional drawing which shows the state which the moving roller of the moving mechanism of the door of the freezer compartment of the refrigerator of 1st Embodiment of this invention inclined inside. Front sectional drawing which shows the moving mechanism of the door of the freezer compartment of the refrigerator of 2nd Embodiment of this invention.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a perspective view of the inside of the refrigerator according to the first embodiment of the present invention. The refrigerator 1 has a heat insulating box 6 filled with a foam heat insulating material 12 (see FIG. 2) such as urethane foam between an outer box 10 formed of a coated steel plate and an inner box 11 formed of a resin molded product. .

  A plurality of inlets (not shown) and a plurality of vent holes (not shown) are opened on the back surface of the outer box 10. The stock solution of the foam heat insulating material 12 is injected between the outer box 10 and the inner box 11 through the injection port. When the foam heat insulating material 12 is filled between the outer box 10 and the inner box 11, the air between the outer box 10 and the inner box 11 and the gas generated at the time of filling are formed in the heat insulating box 6 through the vent holes. Exhausted to the outside.

  The refrigerator compartment 2 is formed in the upper part of the refrigerator 1 by the heat insulation box 6. The front surface of the refrigerator compartment 2 is opened and closed by a rotating door 21 (see FIG. 2). A plurality of support portions 22 extending in the front-rear direction are provided on both side walls 2a of the refrigerator compartment 2 so as to protrude vertically. A tray 23 made of a transparent resin is detachably installed on the support portion 22, and a stored item (not shown) is placed on the tray 23.

  Below the refrigerator compartment 2, the freezer compartment 3 is arranged through a partition wall 11a filled with a heat insulating material. Below the freezer compartment 3, the vegetable compartment 4 is arranged through the partition wall 11b filled with the heat insulating material. Fixed rails 32 (described later) are attached to both side walls 3 a of the freezer compartment 3 and both side walls 4 a of the vegetable compartment 4. The refrigerator compartment 2 and the vegetable compartment 4 are connected via a communication path (not shown).

  A machine room 19 in which a compressor (not shown) for operating the refrigeration cycle is disposed below the rear portion of the heat insulating box 6. The back surface of the machine room 19 is covered with a machine room back plate (not shown).

  The refrigeration cycle is operated by driving the compressor, and cold air is generated. The stored items in the refrigerator compartment 2 and the vegetable compartment 4 are refrigerated and stored in the freezer compartment 3 by the cold air.

  FIG. 2 is a right side sectional view showing details of the freezer compartment 3 and the vegetable compartment 4. In the freezer compartment 3 and the vegetable compartment 4, storage cases 39 and 49 for storing stored items are provided. The front surfaces of the freezer compartment 3 and the vegetable compartment 4 are opened and closed by drawer-type doors 31 and 41 that slide back and forth integrally with the storage cases 39 and 49, respectively.

  The freezer compartment 3 is provided with a moving mechanism 30 that slides the door 31. Similarly, the vegetable compartment 4 is provided with a moving mechanism 40 that slides the door 41. Since the moving mechanism 40 is configured in the same manner as the moving mechanism 30, the moving mechanism 30 will be described below as a representative.

  The moving mechanism 30 includes a frame 35, a fixed rail 32, and a fixed roller 33. The fixed rail 32 is attached to both side walls 3a of the inner box 11 of the freezer compartment 3, and is formed to extend forward and backward by resin. The fixed roller 33 is disposed in front of the fixed rail 32, has a horizontal rotation shaft, and is pivotally supported on both side walls 3 a of the inner box 11.

  The frame 35 is made of metal and extends rearward from the left and right ends of the door 31. A storage case 39 is placed on both frames 35. A moving roller 36 that has a horizontal rotation shaft and rolls on the fixed rail 32 is provided at the rear of the frame 35. The depth of the frame 35 is formed longer than the depth of the storage case 39.

  FIG. 3 shows a top cross-sectional view of the vicinity of the left side wall 3a of the freezer compartment 3. FIG. 4 is a front sectional view of the moving mechanism 30. The fixed rail 32 is formed in a U-shaped cross section with one side surface (inner surface) open, and has an upper rail 32a and a lower rail 32b extending in front and rear and parallel to each other. The fixed rail 32 is sandwiched between projecting portions 3b arranged vertically on the side wall 3a.

  Further, in the vicinity of the side wall 3a, a protruding portion 11g that protrudes forward from the back surface of the inner box 11 is provided. The tip end portion 11k on the side wall 3a side of the protruding portion 11g is chamfered. The fixed rail 32 is fitted between the protruding portion 11g and the side wall 3a, and the rear end of the fixed rail 32 is locked by the protruding portion 11g.

  Engaging claws 32c and 32d are provided at the front and rear portions of the fixed rail 32, respectively. The engaging claws 32c and 32d extend sideways (outer box 10 side) and bend backwards. The engagement length L2 in the front-rear direction of the rear engagement claw 32d is formed longer than the engagement length L1 in the front-rear direction of the front engagement claw 32c.

  Engagement holes 11c and 11d are opened in the front part and the rear part of the side wall 3a of the inner box 11, respectively. The engagement holes 11c and 11d are formed in a substantially rectangular shape in plan view, and the length L4 in the front-rear direction of the rear engagement hole 11d is longer than the length L3 in the front-rear direction of the front engagement hole 11c. The engaging claws 32c and 32d are engaged with the engaging holes 11c and 11d, respectively.

  Between the inner box 11 and the outer box 10, a metal reinforcing plate 40 is disposed in contact with the inner box 11 so as to face the front portion of the fixed rail 32. The reinforcing plate 40 is provided with screw holes 40a and through holes 40b on the front and rear sides. A through hole 11p is opened in the inner box 11 so as to overlap the screw hole 40a, and a boss 32h protruding from the front portion of the fixed rail 32 toward the side is inserted into the through hole 11p. Then, a screw (not shown) is inserted into the insertion hole (not shown) of the boss 32h from the inner side (freezer compartment 3 side) of the inner box 11 and screwed into the screw hole 40a of the reinforcing plate 40, thereby fixing the fixed rail 32. The front part is screwed to the reinforcing plate 40.

  The through hole 40b is provided so as to overlap the engagement hole 11c, and the engagement claw 32c is inserted through the engagement hole 11c and the through hole 40b. Thereby, the engaging claw 32 c engages with the inner box 11 and the reinforcing plate 40.

  FIG. 5 shows a front sectional view through the engaging claw 32 d of the fixed rail 32. The fixed rail 32 is in close contact with a region having a length H3 (6.5 mm in this embodiment) above and below the engagement holes 11c and 11d at least around the engagement holes 11c and 11d. In the present embodiment, the length H3 is formed to be 6.5 mm, but if it is 5 mm or more, as will be described later, the stock solution of the foam heat insulating material 12 through the engagement holes 11c and 11d is moved to the freezer compartment 3 side. Can prevent leakage.

  A rail portion 37 is formed on the upper portion of the frame 35 so as to extend forward and backward and protrude toward the side wall 3a. A stopper (not shown) that protrudes downward is provided at the rear portion of the rail portion 37.

  As shown in FIG. 4, the moving roller 36 includes a ball bearing in which an inner ring portion 36 b is pivotally supported by a horizontal axis at the rear portion of the frame 35. A peripheral surface of the outer ring portion 36c of the moving roller 36 constitutes a rolling surface 36e that rolls on the fixed rail 32, and is formed by a cylindrical surface. The center B of the ball 36d disposed between the inner ring portion 36b and the outer ring portion 36c is disposed outside in the axial direction with respect to the center A in the axial direction of the rolling surface 36e.

  The axial length W1 of the rolling surface 36e of the moving roller 36 is formed to be the same as the axial length W2 of the rolling surface 33e of the fixed roller 33. The outer ring portion 36c rolls on the inner surface of the fixed rail 32 and the fixed roller 33 rolls on the lower surface of the rail portion 37, whereby the door 31 is put in and out.

  FIG. 6 shows a top cross-sectional view of the rear part of the left frame 35. The rear portions of the left and right frames 35 are connected by a rod-like connecting member 34. The connecting member 34 is formed in a U-shape in a plan view that is bent at the front end and opened rearward, and supports the rear portion of the storage case 39. The bending of the left and right frames 35 can be reduced by the connecting member 34.

  The frame 35 and the connecting member 34 are provided with an insertion hole 35h (first insertion hole) and an insertion hole 34h (second insertion hole), respectively. The inner ring portion 36b is provided with an insertion portion 36j that protrudes inward. The insertion part 36j is inserted into the insertion holes 35h and 34h, and the tip of the insertion part 36j is caulked. As a result, a diameter-enlarged portion 36k is formed by expanding the tip of the insertion portion 36j, and the frame 35 and the connecting member 34 are sandwiched by the seat surface 36g and the diameter-enlarged portion 36k of the insertion portion 36j.

  FIG. 7 shows a front sectional view of the fixed roller 33 on the left side wall 3 a of the freezer compartment 3. The fixed roller 33 is composed of a ball bearing in which an inner ring portion 33b is pivotally supported by a horizontal shaft at the front portion of both side walls 3a. The peripheral surface of the outer ring portion 33c of the fixed roller 33 constitutes a rolling surface 33e that rolls on the lower surface of the rail portion 37 of the frame 35, and is formed by a cylindrical surface. The center D of the ball 33d disposed between the inner ring portion 33b and the outer ring portion 33c is disposed on the inner side in the axial direction with respect to the axial center C of the rolling surface 33e.

  In the moving mechanism 30 configured as described above, the door 31 detached from the freezer compartment 3 has the stopper of the frame 35 straddling the upper side of the fixed roller 33 from the front, and the moving roller 36 of the frame 35 includes the upper rail 32a and the lower rail of the fixed rail 32. 32b. When the door 31 is pushed in, the rail portion 37 slides along the fixed roller 33, and the moving roller 36 slides along the fixed rail 32. When the door 31 is further pushed in this state, the door 31 comes into contact with the peripheral edge of the front opening of the freezer compartment 3 and the front surface of the freezer compartment 3 is closed.

  When the closed door 31 is pulled forward, the moving roller 36 rolls on the lower rail 32b of the fixed rail 32, and the fixed roller 33 in contact with the rail portion 37 rotates. Thereby, the storage case 39 is pulled out forward. When the stopper of the frame 35 comes into contact with the fixed roller 33 from the rear, the sliding movement of the door 31 stops.

  At this time, the rolling surface 36c of the moving roller 36 is formed of a cylindrical surface. As a result, the contact area between the moving roller 36 and the fixed rail 32 can be increased. Therefore, the concentration of stress on the fixed rail 32 by the moving roller 36 can be reduced, and damage to the fixed rail 32 can be prevented.

  When the door 31 is pulled forward, the front portion of the frame 35 receives a load downward due to the weight of the storage case 39 that stores the stored items. As a result, the frame 35 is lifted up with the fixed roller 33 as a fulcrum, and the moving roller 36 contacts the upper rail 32 a of the fixed rail 32. For this reason, the frame 35 integral with the door 31 is supported by the fixed roller 33 and the moving roller 36 separated from each other in the front-rear direction, and the door 31 can be prevented from rotating in the vertical direction.

  Further, when the weight of the storage case 39 is large, the fixed roller 33 and the moving roller 36 that serve as a fulcrum of the frame 35 approach when the door 31 is pulled forward. For this reason, the load applied to the moving roller 36 from the upper rail 32a increases. As a result, the connecting member 34 may be deformed, and the left and right moving rollers 36 may come into contact with the upper rail 32a and be inclined in a letter C shape. At this time, as shown in FIG. 7, the rail portion 37 of the frame 35 abuts against the rolling surface 33 e of the fixed roller 33 while being inclined with respect to the horizontal plane.

  FIG. 8 is a front sectional view showing the left moving roller 36 at this time. A rolling surface 36e formed of a cylindrical surface of the inclined moving roller 36 comes into contact with the upper rail 32a at the outer end. Since the center B of the ball 36d of the moving roller 36 is arranged on the outer side in the axial direction with respect to the axial center A of the rolling surface 36e, the rolling surface 36e and the upper rail 32a contact each other at a position close to the ball 36d. Touch. For this reason, even if the position T where the moving roller 36 receives a load from the upper rail 32a approaches the surface on which the ball 36d turns, the moving roller 36 can be rolled even if the force pushing the door 31 is small. Therefore, the door 31 can be easily closed even when the weight of the storage case 39 increases due to the stored items.

  Further, the center D of the ball 33d of the fixed roller 33 is arranged on the inner side in the axial direction with respect to the axial center C of the rolling surface 33e of the fixed roller 33. Thereby, the rolling surface 33e and the rail part 37 contact | abut in the position near the ball | bowl 33d. For this reason, even if the position E where the fixed roller 33 receives the load from the rail portion 37 and the surface on which the ball 33d rotates, the fixed roller 33 can be rolled even if the force pushing the door 31 is small. Therefore, the door 31 can be more easily closed even if the weight of the storage case 39 increases due to the stored items.

  Next, the manufacturing method of the heat insulation box 6 is demonstrated. First, the rear end portion of the fixed rail 32 is inserted between the protruding portion 11g and the side wall 3a so that the angle formed between the side wall 3a of the inner box 11 and the fixed rail 32 is about 30 °. The front part is rotated toward the side wall 3a. When the fixed rail 32 is pushed rearward along the side wall 3a, the rear end portion of the fixed rail 32 disposed between the protruding portion 11g and the side wall 3a is positioned by the protruding portion 11g and the side wall 3a, and The engaging claws 32c and 32d engage with the engaging holes 11c and 11d, respectively.

  At this time, a protruding portion 11g that protrudes from the back surface of the inner box 11 and locks the rear end of the fixed rail 32 is provided. Thereby, the fixed rail 32 can be positioned easily. Therefore, workability at the time of attaching the fixed rail 32 to the inner box 11 can be improved.

  Further, since the tip portion 11k of the protruding portion 11g is chamfered, the fixed rail 32 inclined with respect to the side wall 3a in contact with the tip portion 11k is rotated to easily position the rear end portion of the fixed rail 32. be able to.

  Further, the length L4 in the front-rear direction of the rear engagement hole 11d is longer than the length L3 in the front-rear direction of the front engagement hole 11c. Thereby, before the front engaging claw 32c is inserted into the engaging hole 11c, the rear engaging claw 32d is inserted into the engaging hole 11d. Therefore, since the rear part of the fixed rail 32 is positioned when moving the fixed rail 32 rearward along the side wall 3a, workability at the time of attaching the fixed rail 32 to the inner box 11 can be improved.

  The engagement length L2 of the engagement claw 32d in the front-rear direction is longer than the engagement length L1 of the engagement claw 32c in the front-rear direction. Thereby, before the front engaging claw 32c starts to engage with the engaging hole 11c, the rear engaging claw 32d starts to engage with the engaging hole 11d. Therefore, when the fixed rail 32 is moved rearward along the side wall 3a, the rear portion of the fixed rail 32 is reliably positioned, so that the workability when the fixed rail 32 is attached to the inner box 11 can be further improved. it can.

  Then, a screw is inserted into the insertion hole of the boss 32 h from the inner side of the inner box 11 (freezer compartment 3 side), and a screw is screwed into the screw hole 40 a of the reinforcing plate 40, so that the front portion of the fixed rail 32 is connected to the reinforcing plate 40. Screw on.

  After that, the outer box 10 is arranged so as to cover the outer side of the inner box 11, and the inner box 11 is placed on a foaming jig (not shown) so that the opening on the front surface of the inner box 11 faces down. . At this time, a predetermined gap is formed between the fixed rail 32 and the foaming jig. Thereby, interference with a foaming jig and the fixed rail 32 can be prevented. Thereafter, the stock solution of the foam heat insulating material 12 is injected between the outer box 10 and the inner box 11 through the inlet of the outer box 10.

  When the stock solution of the foam heat insulating material 12 is foamed, the foam heat insulating material 12 is filled between the inner box 11 and the outer box 10. Air between the inner box 11 and the outer box 10 or gas generated during filling is exhausted from the vent hole to the outside of the heat insulating box 6. At this time, since the engaging claws 32c and 32d are embedded in the foam heat insulating material 12, it is prevented from coming off from the inner box 11. Thereby, the heat insulation box 6 in which the fixed rail 32 is attached to the inner box 11 is formed.

  In the present embodiment, the engaging claws 32c and 32d project from the front and rear portions of the fixed rail 32, respectively, and engage the engaging claws 32c and 32d at the front and rear portions of the side walls 3a of the inner box 11, respectively. Engagement holes 11c and 11d are provided. The front portion of the fixed rail 32 is screwed to the inner box 11. Accordingly, the fixed rail 32 can be attached to the inner box 11 without screwing the rear portion of the fixed rail 32. Therefore, the manufacturing man-hour of the refrigerator 1 can be reduced.

  Further, the fixed rail 32 is fixed by screwing the front portion of the fixed rail 32, engaging the engaging claws 32c and 32d with the engaging holes 11c and 11d, and locking the rear end of the fixed rail 32 by the protruding portion 11g. The side face extending in contact with the inner box 11 and extending back and forth can counter the foaming pressure when the foam heat insulating material 12 is filled. Thereby, a deformation | transformation of the fixed rail 32 can be reduced and the fluctuation | variation of the distance between the left and right fixed rails 32 can be prevented. Therefore, the clearance S (see FIG. 4) between the fixed rail 32 and the frame 35 can be secured, and the door 31 can be prevented from being opened and closed.

  Further, it is possible to prevent the fixed rail 32 from falling off from the inner box 11 due to the foaming pressure when the foam heat insulating material 12 is filled.

  Further, by changing the positions of the engaging claws 32d and the engaging holes 11d for each refrigerator model, it is possible to easily prevent the fixing rail 32 from being attached incorrectly.

  Further, when the fixed rail 32 is in close contact with the upper and lower portions of the engagement holes 11c and 11d at least 5 mm around the engagement holes 11c and 11d, the foam insulation 12 is filled between the outer box 10 and the inner box 11. At this time, it is possible to prevent the stock solution of the foam heat insulating material 12 from leaking to the freezer compartment 3 side through the engagement holes 11c and 11d. Therefore, it is not necessary to provide a seal member or the like in the gap between the engagement claw 32c and the engagement hole 11c and the gap between the engagement claw 32d and the engagement hole 11d, and the manufacturing man-hour of the refrigerator 1 is reduced. Can do.

  According to the present embodiment, since the rolling surface 36e of the moving roller 36 composed of a ball bearing is formed of a cylindrical surface, the contact area between the moving roller 36 and the fixed rail 32 can be increased. For this reason, the concentration of stress on the fixed rail 32 by the moving roller 36 can be reduced, and damage to the fixed rail 32 can be prevented. Therefore, the usability of the refrigerator 1 can be improved.

  Further, the center B of the ball 36d is arranged on the outer side in the axial direction with respect to the axial center A of the rolling surface 36e of the moving roller 36. As a result, when the left and right moving rollers 36 abut against the upper rail 32a due to the weight of the storage case 39 pulled forward, and tilted in a C shape, the rolling surface 36e of the cylindrical surface is positioned near the ball 36d. The upper rail 32a contacts. For this reason, the position T at which the moving roller 36 receives a load from the upper rail 32a and the surface on which the ball 36d revolves approach each other, and the moving roller 36 can be rolled even if the force pushing the door is small. Therefore, the door 31 can be easily closed even when the weight of the storage case 39 increases due to the stored items, and the usability of the refrigerator 1 can be further improved.

  Further, the center D of the ball 33d of the fixed roller 33 is arranged on the inner side in the axial direction with respect to the axial center C of the rolling surface 33e of the fixed roller 33. As a result, when the rail portion 37 of the frame 35 is in contact with the rolling surface 33e of the fixed roller 33 in a state where the rail portion 37 of the frame 35 is inclined with respect to the horizontal plane due to the weight of the storage case 39 drawn forward, the fixed roller 33 is moved to the rail portion 37. Even if the position E where the load is received from the surface and the surface on which the ball 33d revolves approach each other and the force pushing the door 31 is small, the fixed roller 33 can be rolled. Therefore, the door 31 can be more easily closed even if the weight of the storage case 39 increases due to the stored items.

  Further, the inner ring portion 36b of the moving roller 36 protrudes inward, and the insertion portion 36j is inserted into the insertion hole 35h (first insertion hole) of the frame 35 and the insertion hole 34h (second insertion hole) of the connecting member 34, and the insertion portion 36j. The diameter of the tip of the portion 36j is increased, and the frame 35 and the connecting member 34 are sandwiched by the seat surface 36g and the enlarged diameter portion 36k of the insertion portion 36j. Thereby, the bending of the left and right frames 35 can be reduced by the connecting member 34, and the connecting member 34 and the moving roller 36 can be easily attached to the frame 35.

Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 9 shows a front sectional view of the moving mechanism of the freezer compartment of the refrigerator of this embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In the present embodiment, the relationship between the axial length W1 of the rolling surface 36e of the moving roller 36 and the axial length W2 of the rolling surface 33e of the fixed roller 33 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

  The axial length W2 of the rolling surface 33e is longer than the axial length W1 of the rolling surface 36e. Accordingly, the frame 35 can be stably guided by the fixed roller 33 while suppressing an increase in the length in the left-right direction of the moving roller 36 that moves back and forth.

  In this embodiment, the same effect as that of the first embodiment can be obtained.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. This embodiment is different from the first embodiment in that the fixed roller 33 is omitted. Other parts are the same as those in the first embodiment.

  In front of the fixed rail 32, a protruding portion (not shown) protruding inward from the side wall 3a is provided. The protruding portion is formed by a part of the inner box 11. Further, the length of the protruding portion in the left-right direction is the same as the axial length W1 of the rolling surface 36e of the moving roller 36. As the rail portion 37 of the frame 35 slides on the upper surface of the protruding portion, the frame 35 is guided back and forth, and the door 31 is opened and closed.

  In the present embodiment, the same effect as in the first embodiment can be obtained. Further, since the frame 35 is guided by the protruding portion formed by a part of the inner box 11, the moving mechanism 30 can be easily realized. In addition, since the door 31 can be opened and closed more smoothly if the fixed roller 33 is provided like 1st Embodiment, it is more desirable.

  In the second embodiment, the protruding portion of this embodiment may be provided in place of the fixed roller 33. In this case, the length of the protruding portion in the left-right direction is made longer than the axial length W1 of the rolling surface 36e of the moving roller 36.

  Further, in the first to third embodiments, the outer ring portion 36c is supported by the frame 35 instead of the moving roller 36 that forms the rolling surface 36e, and the outer ring portion is refrigerated more than the outer ring portion. A moving roller in which the outer peripheral surface of the inner ring portion protruding inside the chamber 3 forms a rolling surface may be used.

  In the first to third embodiments, a drawer-type door similar to the doors 31 and 41 is provided in the refrigerating chamber 2 in place of the rotary door 21, and a moving mechanism similar to the moving mechanisms 30 and 40 is provided. May be provided in the refrigerator compartment 2.

  INDUSTRIAL APPLICATION This invention can be utilized for the refrigerator which can take in and out a storage case with the door which opens and closes a storage chamber.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigerated room 3 Freezer room 4 Vegetable room 6 Heat insulation box 10 Outer box 11 Inner box 11a, 11b Partition wall 11c, 11d Engagement hole 11g Protrusion part 11k Tip part 12 Foam insulation material 21, 31, 41 Door 22 Support Part 23 Tray 30, 40 Moving mechanism 32 Fixed rail 32a Upper rail 32b Lower rail 32c, 32d Engaging claw 33 Fixed roller 33b Inner ring part 33c Outer ring part 33d Ball 33e Rolling surface 35 Frame 35h Insertion hole (first insertion hole)
36 Moving roller 36b Inner ring part 36c Outer ring part 36d Ball 36e Rolling surface 36g Seating surface 36h Insertion hole (second insertion hole)
36j Insertion part 36k Expanded diameter part 37 Rail part 39, 49 Storage case

Claims (4)

A door that opens and closes the storage chamber, a frame that extends rearward from the left and right ends of the door, a moving roller that includes a ball bearing that is pivotally supported on the rear portion of the frame, and that extends back and forth on both side walls of the storage chamber A refrigerator provided with a fixed rail and a storage case supported by the frame, wherein the moving roller rolls on the fixed rail and the storage case is integrated with the door;
The fixed rail has a parallel upper rail and a lower rail arranged side by side, and a rolling surface of the moving roller is formed by a cylindrical surface, with respect to an axial center of the rolling surface of the moving roller. A refrigerator characterized in that the center of the ball of the moving roller is arranged outside in the axial direction.   A fixed roller that is supported by a horizontal shaft on both side walls and guides the frame is provided, a rolling surface of the fixed roller is formed by a cylindrical surface, and the rolling surface of the fixed roller is the surface of the moving roller. The refrigerator according to claim 1, wherein the refrigerator is longer in the axial direction than the rolling surface.   A fixed roller configured to guide the frame by ball bearings pivotally supported on both side walls, the rolling surface of the fixed roller being formed by a cylindrical surface, and the axial center of the rolling surface of the fixed roller; The refrigerator according to claim 1, wherein the center of the ball of the fixed roller is arranged on the inner side in the axial direction.   A connecting member that connects rear portions of the left and right frames; a first insertion hole and a second insertion hole provided in the frame and the connection member, respectively; and an inner ring portion of the moving roller protrudes inward to form a first insertion hole And an insertion portion that is inserted through the second insertion hole, and a diameter-enlarged portion that expands the tip of the insertion portion, and the frame and the connecting member are sandwiched between the seating surface of the insertion portion and the diameter-enlarged portion. The refrigerator in any one of Claims 1-3 characterized by the above-mentioned.

Images