JPH076433Y2 - Refrigerator sealed door - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a sealing door of a refrigerator used for freezing, refrigerating, and the like, and in particular, a sealing that can obtain a complete sealing function with a simple structure. It is about the door.

[Prior art]

FIG. 6 (a) is a perspective view showing a sealing door which is the background of the present invention. The sealing door 1 in this figure is slidably suspended along a rail provided along the upper edge of the opening of a refrigerator (including a freezer). 3, 3 are vehicle bodies equipped with wheels 4 that roll along the rails 2, and the sealing door 1 is
Freely swingable on the vehicle body 3 via the hinges 5, 5 (arrow X)
It is hung on.

Reference numeral 6 is a fitting portion into which the tip of the sealing door 1 is fitted. In the fully closed state, the sealing door 1 has to be pressed tightly against the opening edge of the refrigerator or the like to keep the refrigerator airtight. Therefore, in the above-mentioned conventional sealing door 1, the sealing door 1 that has slid to near the fully closed state.
In the vicinity of the fully closed portion as shown by arrow Y so as to be in close contact with the opening edge portion, and thereafter, the sealing door 1 is pushed until the leading end portion of the sealing door 1 is fitted into the fitting portion 6. Push in the fully closed direction.

In order to press the sealing door 1 against the opening of the refrigerator as described above, the sealing door 1 is swingably suspended via the hinge portion 5. FIG. 6 (b) shows a state in which the sealing door 1 is pressed against the opening edge of the refrigerator as described above.

[Problems to be solved by the device]

As described above, the sealing door 1 is configured to be suspended from the rail 2 by the vehicle body 3 via the hinge portion 5.

Therefore, as shown in FIG. 6B, when the sealing door 1 is pressed against the opening edge of the refrigerator, the vehicle body 3 is tilted as shown in the drawing, and the sealing door 1 is pressed in the direction of the arrow Y. The sealing door 1 as described above is considerably heavy in order to improve the heat insulating property. With the structure in which the sealing door 1 is simply lifted via the hinge portion 5 as described above, while the sealing door 1 is being lifted, Since there is no choice but to press in the direction of the arrow Y, a very large force is required, and since the sealing door 1 is slightly lifted when the sealing door 1 is pressed in the direction of the arrow, the lower end of the sealing door 1 There was a defect that a gap was opened in the part and cold air escaped.

Therefore, it is an object of the present invention to obtain a sealing door which does not require a large force when closing the sealing door and has a high sealing property.

[Means for Solving the Problems]

In order to achieve the above object, the means adopted by the present invention are:
In a refrigerator sealing door that opens and closes the opening of the refrigerator by sliding along a horizontal rail provided on the upper edge of the opening of the refrigerator, a pair of vehicle bodies provided with wheels that roll along the rail. , A long hole extending in the thickness direction of the sealing door is provided, and a supporting member inserted into the long hole and attached to the sealing door has an annular shape in a plane perpendicular to the axis of the supporting member. A thrust bearing having a plurality of spherical rolling elements that are rotatably supported by the cage of the above and roll-contacted on the vehicle body, and the load of the sealing door is passed through the support member and the thrust bearing. The sealing door is supported on the vehicle body so as to be slidable in the thickness direction thereof, and the rail is provided with an inclined portion into which the wheel is fitted when the sealing door comes to the closing position, Further, on the lower surface of the sealing door, a guide inclined toward the opening of the refrigerator. A plate is provided, and a conical roller having a conical surface with a substantially equal taper angle that can be brought into rolling contact with the guide plate is rotatably provided on the opening side, and the conical roller is moved downward near the closing position of the sealing door. The refrigerator door is characterized in that the door is biased toward the opening edge of the refrigerator.

[Action]

The sealing door according to the present invention slightly sinks when the sealing door reaches the closing position due to the inclined portion provided on the rail. By the operation of sinking the sealing door, the biasing means acts and the sealing door is pressed toward the opening edge of the refrigerator.

Therefore, when closing the sealing door to the fully closed position, simply push in the closing direction.The sliding door slides down the inclined part by its own weight and is pressed against the opening edge of the refrigerator by its force, so You don't need much power to. Also,
Since the sealing door only moves horizontally when it is pressed against the opening edge of the refrigerator, there is no inconvenience that a gap is formed between the sealing door and the opening edge of the refrigerator.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is an exploded perspective view of a refrigerator door according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing the entire door, and FIG.
FIG. 4 is a side sectional view showing a structure for slidably supporting the sealing door in the thickness direction, FIG. 4 is a plan view showing a structure for pressing the sealing door against the opening edge of the refrigerator, and FIG. An example of a biasing means for pressing the door against the opening edge of the refrigerator by its descending operation is shown. FIG. 7A shows an example of the biasing means provided on the door tail side of the sealing door, and FIG. FIG. 3 is a side view showing an example of biasing means provided on the door end side.

In addition, the following embodiments are merely examples embodying the present invention,
It does not limit the technical scope of the present invention.

Similar to the conventional sealing door shown in FIG. 6, the sealing door 10 according to this embodiment slides along a horizontal rail 2 provided at the upper edge of the opening of the refrigerator, so that Opening 7
(Fig. 2) is opened and closed, the same reference numerals are used for the same elements as those shown in Fig. 6, and the description thereof will be omitted.

The sealing door 10 is, like the conventional example shown in FIG. 6, a pair of vehicle bodies 3, 3 provided with wheels 4, 4 rolling along the rail 2.
Are provided on the door-end side and the door-end side, respectively, and are slidably attached to the vehicle bodies 3, 3 in the thickness direction of the sealing door. FIG. 1 shows a sliding support structure of such a sealing door 10 in a horizontal direction. A vehicle body 3 having wheels 4 and 4 integrally has a mounting plate 11 at a lower portion thereof. The mounting plate 11 is formed with long holes 12, 12 in the thickness direction of the sealing door 10. Corresponding to the oblong holes 12 and 12, screw holes 14 and 14 for screwing bolts 13 and 13 (supporting members) to be inserted into the oblong holes 12 and 12 are formed on the upper surface of the sealing door 10. Has been done. Further, thrust bearings 17, 17 are attached to the bolt 13 via a washer 15 and a spacer 16. Here, the thrust bearing 17 is a bearing used in a portion that bears an axial load (thrust load) thereof, as is well known, and a plurality of spherical rolling elements are arranged at a predetermined interval in an annular cage. Each of them is held so that it can roll independently while keeping.

Therefore, as shown in FIG.
When 10 is suspended, the load on the sealing door 10 is
3, Being added to the thrust bearing 17 via the washer 15 and the spacer 16, and contacting the upper surface of the mounting plate 11 of the vehicle body 3 in a state where each spherical rolling element of the thrust bearing 17 is rotatably held by the cage. Thus, the sealing door 10 is slidably supported by the length of the slot 12 in the longitudinal direction.

On the other hand, the rail 2 is formed with an inclined portion (downward in the closing direction) 18 into which the wheel 4 provided on the vehicle body 3 is fitted when the sealing door 10 approaches the closing position. .

Therefore, when the sealing door 10 is moved toward the closed position, the wheels 4 soon approach the inclined portions 18 and 18, and the entire sealing door 10 is moved by the descending depth of the inclined portion 18. It will sink.

The lower surface of the sealing door 10 is provided with a guide plate 19 that is inclined downward in the direction of the opening 7, and the door tip side and the door butt side of the opening 7 are respectively described above. A conical roller having a conical surface with the same taper angle as the guide plate 19
20 and 20 are rotatably provided. 21 is a sealing door with the guide plate 19 sandwiched between it and the conical roller 20 on the door end side.
It is a holding plate to prevent 10 from coming off. The guide plate 19 and the conical roller 20 constitute a so-called urging means for urging the sealing door 10 toward the opening 7 side of the refrigerator.

Further, a guide roller 22 rotatable around a vertical axis is provided at the center of the upper end of the sealing door 10, and a taper guide plate 23 for engaging the guide roller 22 is provided at the upper center of the opening edge. It is provided. The taper direction of the taper guide plate 23 is a direction narrowing toward the fully closing direction of the sealing door 10.

Therefore, when the sealing door 10 is closed along the rail 2, the wheels 4, 4 near the fully closed position of the rail 4, the inclined portions 18 ,.
It approaches 18 and is accelerated by its own weight along the inclined surface and slides down. At this time, the guide roller 22 interferes with the taper guide plate 23 (see FIG. 4), and the upper end of the sealing door 10 is pressed toward the peripheral edge of the opening 7 of the refrigerator. At the same time, the guide plate 19 at the lower end of the sealing door 10 is a conical roller.
Since it contacts the conical surface of 20, 20, it is guided by this conical surface and slides down in the direction of the opening 7, and is pressed against the edge of the opening.

At this time, as described above, the sealing door 10 is slidable in the thickness direction by the length of the elongated holes 12, 12, so that the interference between the taper guide plate 23 and the guide roller 22 and By the interference between the guide plate 19 and the conical roller 20, the guide plate 19 and the conical roller 20 are uniformly pressed against the edge of the opening 7. 5 (a) and 5 (b), the guide plate 19 abuts the conical rollers 20 and 20, and the sealing door 10 is guided by the tapered surface of the conical roller 20 and slides down. The lower end is shown pressed against the peripheral edge of the opening 7.

[Effect of device]

As described above, the present invention is a refrigerator sealing door that opens and closes the opening of a refrigerator by sliding along a horizontal rail provided at the upper edge of the opening of the refrigerator, and rolls along the rail. The pair of vehicle bodies provided with the wheels are provided with elongated holes extending in the thickness direction of the sealing door, and the support member inserted into the elongated hole and attached to the sealing door has a shaft of the supporting member. A thrust bearing having a plurality of spherical rolling elements rotatably supported by an annular retainer in a plane perpendicular to the core and rolling contact with the vehicle body is fitted, and the load of the sealing door is set to the above. The sealing door is slidable in the thickness direction by being supported on the vehicle body via a supporting member and a thrust bearing, and when the sealing door comes to the closed position on the rail, the wheel is A slanted part is formed to fit in, and a refrigerator opening is formed on the lower surface of the sealing door. A guide plate inclined toward the direction, and a conical roller having a conical surface with substantially the same taper angle that can be rolled and contacted with the guide plate is rotatably provided on the opening side to close the sealing door. Since the refrigerator closing door is characterized in that the closing door is urged toward the opening edge of the refrigerator by the descending operation in the vicinity of the position, the operator moves the closing door in the closing direction. Just press
The sealing door slightly sinks along the inclined portion of the rail, and is smoothly urged toward the opening by the action of its own weight, thrust bearing, conical roller, etc., so that the sealing door is completely sealed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a refrigerator sealing door according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing the entire sealing door, and FIG. 3 is a sliding direction of the sealing door in a thickness direction. FIG. 4 is a side sectional view showing a structure for supporting freely, FIG. 4 is a plan view showing a structure for pressing the sealing door against the refrigerator opening edge portion, and FIG. An example of the urging means for pressing is shown. FIG. 7A shows an example of the urging means provided on the door tail side of the sealing door, and FIG. 9B shows an example of the urging means provided on the door tip side. 6A and 6B are schematic perspective views of the entire sealing door, which is the background of the present invention. [Explanation of Codes] 2 ... Rail, 3 ... Vehicle Body 4 ... Wheel, 7 ... Opening 10 ... Sealing Door, 12 ... Slot 13 ... Bolt (Supporting Member), 17 ... Thrust Bearing 18 ... Slope, 19 ... Guide Plate 20 ... Conical roller, 22 ... Guide roller 23 ... Tapered guide plate

 ─────────────────────────────────────────────────── ───Continued from the front page (56) References Actual flat 2-64881 (JP, U) Actual flat 2-140289 (JP, U) Actual 60-176088 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A refrigerator sealing door that opens and closes the opening of the refrigerator by sliding along a horizontal rail provided at the upper edge of the opening of the refrigerator, comprising a wheel that rolls along the rail. The pair of vehicle bodies are provided with elongated holes extending in the thickness direction of the sealing door, and the support member inserted into the elongated hole and attached to the sealing door is formed at a right angle to the axis of the supporting member. A thrust bearing having a plurality of spherical rolling elements rotatably supported by an annular retainer in the plane and rollingly contacted with the vehicle body is fitted, and the load of the sealing door is applied to the support member and the thrust. An inclination that allows the sealing door to be slidable in the thickness direction by being supported on the vehicle body via a bearing, and in which the wheel fits into the rail when the sealing door comes to its closed position. Part, and further face the direction of the refrigerator opening on the lower surface of the sealing door. A slanting guide plate is provided, and a conical roller having a conical surface with a substantially equal taper angle capable of rolling contact with the guide plate is rotatably provided on the side of the opening so that the conical roller near the closing position of the sealing door is provided. A refrigerator sealing door, characterized in that the descending operation urges the sealing door toward the opening edge of the refrigerator.