WO2022249521A1

WO2022249521A1 - Refrigerator

Info

Publication number: WO2022249521A1
Application number: PCT/JP2021/047869
Authority: WO
Inventors: 正大市川; 慎二伊藤; 幸司坂田
Original assignee: 日立グローバルライフソリューションズ株式会社
Priority date: 2021-05-27
Filing date: 2021-12-23
Publication date: 2022-12-01
Also published as: JP2022181849A

Abstract

After studying actual fixation of a door of a refrigerator with a stretch film, the inventors have found that an excessive fixation force is not favorable. That is, it has been found that a user requires a large force to open a door after unpackaging if a fixation force is excessive. Therefore, the present invention provides a refrigerator in which a box body provided with a pullout door and a rotary door are packaged by a stretch film, wherein a pressing force with which the stretch film presses the pullout door is set at 99 N or less.

Description

refrigerator

The present invention relates to refrigerators.

Refrigerators are generally packaged and shipped to prevent the door from opening.
As one aspect of refrigerator packaging, for example, Patent Document 1 describes packaging a refrigerator by covering it with a gusset bag made of a bag-like stretch film (paragraphs 0013 to 0018, FIG. 3, etc.). .

JP-A-2000-246841

Although Patent Document 1 discloses wrapping a refrigerator with a stretch film, it does not disclose or suggest concerns about excessive pressing force.

This time, when the inventors actually considered fixing the refrigerator door with stretch film, they found that too strong a fixing force was not preferable. In other words, it has been found that if the fixing force is too strong, a large force is required for the user of the refrigerator to open the door after unpacking.

In view of the above-mentioned problems, the present invention provides a refrigerator in which a box having a drawer-type door and a rotating door is wrapped with a stretch film, and the stretch film presses the drawer-type door. The pressing force was set to 99N or less.

The front view perspective view of the refrigerator which concerns on this embodiment. FIG. 2 is a rear view of the vicinity of the upper portion of the refrigerator according to the present embodiment; The perspective view which shows the handle for carrying of the refrigerator which concerns on this embodiment. The front perspective view which shows the state which wrapped the stretch film in the refrigerator of this embodiment. The figure which shows the first half of a packaging process. The figure which shows the latter half of a packaging process. 4 is a graph showing the relationship between the pressing force with which a stretch film presses a drawer-type door and the force required to open the drawer-type door. 4 is a table showing the pressing force applied to each heat insulating door after packaging and the amount of packing collapse of the lower freezer compartment door and the vegetable compartment door for a relatively small refrigerator with a single door. 4 is a table showing the pressing force applied to each heat insulating door after packing and the amount of packing collapse of the lower freezer compartment door and the vegetable compartment door for a relatively large-sized refrigerator with French doors.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the overall configuration of the refrigerator 1 according to this embodiment will be described. FIG. 1 is a front perspective view of the refrigerator according to this embodiment. As shown in FIG. 1, a refrigerator 1 has storage compartments in the order from top to bottom: a refrigerating compartment 2, an ice making compartment 3, an upper freezing compartment 4, a lower freezing compartment 5, and a vegetable compartment 6. Each compartment has a front opening. The section is provided with an insulated door that opens and closes these openings. The arrangement of each storage room is not limited to this.

The heat-insulating doors include rotating refrigerating

compartment doors

2a and 2b that rotate about hinges (not shown), a drawer-type ice making compartment door 3a, an upper freezing compartment door 4a, a lower freezing compartment door 5a, and a vegetable compartment. It consists of a door 6a. In addition, packing is provided on the outer periphery of the inner wall surface of each heat-insulating door to improve the airtightness between it and the opening edge of the storage compartment when the door is closed. A vacuum heat insulating material is arranged inside each heat insulating door, and the space other than the vacuum heat insulating material is filled with foam heat insulating material such as rigid urethane foam.

The heat insulating box body of the refrigerator 1 includes an outer box made of steel plate and an inner box made of synthetic resin. Each storage room in the heat insulating box is insulated from the outside. The outer box is composed of a top plate 71, left and right side plates 72, a rear plate 73 (see FIG. 2) and a bottom plate (not shown). The top plate 71 and the side plates 72 are integrally formed by bending, and the rear plate 73 and the bottom plate are later fixed to the top plate 71 and the side plates 72 to be integrated.

Furthermore, the refrigerator 1 is provided with a cooler (not shown) for cooling each storage compartment to a predetermined temperature range. A compressor (not shown) for compressing the refrigerant, heat radiation means (not shown condenser and heat radiation pipe) for releasing heat from the refrigerant sent from the compressor, decompression means (not shown) for decompressing the refrigerant sent from the heat radiation means A refrigerating cycle is formed by connecting a capillary tube) and a cooler that cools the air by evaporating the refrigerant sent from the decompression means.

FIG. 2 is a rear view of the vicinity of the upper portion of the refrigerator according to the present embodiment. As shown in FIG. 2 , transport handles having handle portions 13 are provided at the upper ends of the left and right sides of the back plate 73 .
This carrying handle is molded from a synthetic resin, and is used when the refrigerator 1 is laid down from an upright state or when the refrigerator 1 is moved in a laid down state. In addition, since the carrying handle of this embodiment is attached to the inclined surface of the narrowed portion formed at the upper end of the back plate 73 , it does not protrude backward beyond the flat surface of the back plate 73 .

FIG. 3 is a perspective view showing the carrying handle of the refrigerator according to this embodiment. As shown in FIG. 3, the carrying handle 10 includes a base portion 11, an inner base portion 12a and an outer base portion 12b formed on the left and right sides of the base portion 11, and a handle portion bridged between these base portions. 13 and .

Each base portion is formed to protrude rearward from the base portion 11 and has a plurality of screw bosses 14 formed therein. The carrying handle 10 is fixed to the refrigerator 1 by inserting a screw (not shown) through the screw boss 14 and screwing it to the rear plate 73 . Since the handle portion 13 is spaced apart from the base portion 11 , the handle portion 13 can be held by a hand when the worker carries the refrigerator 1 . A recess 15 through which the power cord 8 is inserted is formed below the outer base portion 12b. A hook 16 is formed in the recess 15 to prevent the power cord 8 from jumping out of the recess 15 .

Fig. 4 is a front perspective view showing the state in which the stretch film is wrapped in the refrigerator of this embodiment. As shown in FIG. 4 , the stretch film 20 is provided with a mark 21 for unpacking at a position corresponding to the front side of the refrigerator 1 . The mark 21 extends in the vertical direction so as to straddle a recessed portion on the front side of the refrigerator existing between adjacent upper and lower heat insulating doors, for example, a handle portion of the lower heat insulating door. If this recessed portion exists on the front side of the refrigerator 1, a gap is formed between it and the stretched stretch film 20, so that a worker can easily make a hole in the stretch film 20 by pressing it with his/her finger. It is possible. In addition, since the mark 21 extends vertically on the front side of the refrigerator, the stretch film 20 can be urged to be torn left and right along the mark 21 when the worker unpacks. By tearing the stretch film 20 left and right in this way, it is possible to reuse the torn stretch film 20 even when it is necessary to pack it again. The mark 21 attached to the stretch film 20 may be printed or taped, or may be unevenness formed by processing the stretch film 20 . Moreover, it is desirable that the mark 21 extends not only to the place corresponding to the front surface of the refrigerator 1 but also to the places corresponding to the top surface and the bottom surface of the refrigerator 1 .

Furthermore, as the details will be described later, the stretch film 20 is attached so as to cover the refrigerator 1 downward from the top surface side, so that the upper end of the stretch film 20 is higher than the upper end of the box. On the other hand, as shown in FIG. 4, the lower end of the stretch film 20 is higher than the lower ends of the box and the lowest door (vegetable compartment door 6a). This is because the main purpose of the stretch film 20 of this embodiment is to fix the heat-insulating door, and the polystyrene foam 30 and the cardboard 40 are used to protect the box. In addition, since the stretch film 20 does not reach the lower end of the box, it does not come into contact with the floor surface, keeping a clean feeling and reducing the usage amount of the stretch film 20. - 特許庁

Here, when the stretch film 20 is put on the refrigerator 1 as shown in FIG. It may break. Therefore, in this embodiment, as shown in FIG. 2, the power plug 9 and part of the power cord 8 are accommodated in the space formed by the carrying handle 10 and the stretch film 20 .

Also, the stretch film 20 stretched so as to cover the concave portion of the carrying handle 10 can be easily perforated by pressing it with the operator's finger. Therefore, by tearing and removing only the stretch film 20 at the portion of the transport handle 10, the refrigerator 1 can be transported while the main body of the stretch film 20 remains. That is, even if the stretch film 20 is not repackaged, it is possible to prevent the stretch film 20 from being damaged due to opening of the door or contact during transportation.

Next, the process of wrapping the refrigerator 1 with the stretch film 20 will be described with reference to FIGS. 5A and 5B. FIG. 5A is a diagram showing the first half of the packaging process, and FIG. 5B is a diagram showing the second half of the packaging process.

First, the roll-shaped stretch film 20 is conveyed to the upper part of the packaging equipment (step S1). The stretch film 20 has a folding structure called a gusset type.

Next, the winding mechanism grips the four corners of the leading edge of the stretch film 20 and pulls it apart from the folded state to spread it (step S2).

Further, the winding mechanism spreads the separated stretch film 20 in four directions, and winds up the stretch film 20 to be used for packaging (step S3).

After that, the cutting mechanism cuts the stretch film 20 (step S4).

Next, the tensioning mechanism grips the stretch film 20 at four locations corresponding to the four corners of the refrigerator 1 in the horizontal direction, pulls the stretch film 20 in four directions at the same time, and stretches the stretch film so that it becomes larger than the horizontal cross-sectional size of the refrigerator 1 . 20 is extended (step S5).

Then, while the stretching mechanism is pulling the stretch film 20, the vertical movement mechanism lowers the stretch film 20 (step S6). At this time, since the end portion of the stretch film 20 is not stretched, the end portion is caught on the top surface of the refrigerator 1 . Then, as the vertical movement mechanism descends, the tension by the tension mechanism is released in order from the stretch film 20 positioned above. As a result, the upper stretch film 20 is sequentially shrunk to its original state, and the stretch film 20 is wound from the upper side surface to the lower side surface of the refrigerator 1 . In addition, by cutting the stretch film 20 in step S4 so that the length of the film above the portion caught on the top surface of the refrigerator 1 is sufficiently long, the upper film can be folded to prevent dust from entering.

When the tip of the cut stretch film 20 passes through the upper end of the lowermost storage compartment (vegetable compartment 6) and reaches the amount necessary for fixing the lowermost storage compartment door (vegetable compartment door 6a), it is pulled. All the tension by the mechanism is released and the packaging of the refrigerator 1 is completed (step S7).

The stretch film described in the above-mentioned Patent Document 1 needs to be made into a bag shape by welding the upper part of the cut film (the top surface side of the refrigerator), but in this embodiment, the film is at the top surface angle of the refrigerator 1. Since the film does not get caught in the part and the film falls down, it can be used as it is without welding. Moreover, according to the packaging according to the present embodiment, since the holes in the stretch film 20 are positioned at the positions corresponding to the top surface of the box of the refrigerator 1, the unpacking operation is facilitated. Furthermore, in step S3, the stretch film 20 may be excessively wound up beyond the dimension from the part that is caught on the top surface of the box of the refrigerator 1 to the bottom of the box, and cut in step S4. . Since the excess part of the stretch film 20 is not stretched even after the refrigerator 1 is wrapped, the part is folded so as to cover the top plate 71, so that the top surface of the refrigerator 1 is not soiled for a long period of time. Storage is also possible.

　Hereinafter, the result of examining the appropriate value of the pressing force with which the stretch film 20 presses each heat insulating door will be described. FIG. 6 is a graph showing the relationship between the pressing force with which the stretch film presses the drawer-type door and the force required to open the drawer-type door after unpacking. The dotted line in FIG. 6 is a straight line that approximates these relationships. In addition, the measurement results indicated by the circles in FIG. 6 include the results when the lower freezer compartment door 5a and the vegetable compartment door 6a are used as drawer-type doors. .

As can be seen from FIG. 6, the greater the pressing force of the stretch film 20, the greater the force required to open the drawer-type door after packing. Here, when the door opening force exceeds 52N, the operability is extremely deteriorated. When the pressing force of the stretch film 20 corresponding to this door opening force of 52N is calculated based on the approximate expression indicated by the dotted line in FIG. 6, it is 99N. Therefore, by wrapping the stretch film 20 so that the pressing force against the drawer-type door is 99 N or less, it is possible to suppress deterioration in operability by the user. The pressing force on the door is likely to be greater at both ends in the left-right direction than at the center in the left-right direction. The influence on the operability by pressing is low. Also, since the ice making compartment door 3a and the upper freezer compartment door 4a are relatively small doors, similarly, the pressing of the stretch film 20 has little influence on the operability.

The excessive pressing force of the stretch film 20 affects not only operability but also other aspects. For example, there is a possibility that the amount of restoration of the packing of the door will be reduced, resulting in a decrease in sealing performance during use after unpacking, resulting in a decrease in cooling performance and an increase in power consumption. Furthermore, the drawer-type doors (particularly, the lower freezer compartment door 5a and the vegetable compartment door 6a) have a large amount of crushing of the packing compared to the rotating doors supported by hinges (refrigerating

compartment doors

2a and 2b). easy to become Therefore, after unpacking, the drawer-type door will be pulled backward relative to the rotating door, and there is a possibility that a step will occur between the drawer-type door and the rotating door. Therefore, it is not desirable in terms of appearance.

Therefore, in the present embodiment, the stretch film 20 is wrapped so that the amount of crushing of the packing of the lower freezer compartment door and the vegetable compartment door, which is the most easily crushed packing, is 2 mm or less.

FIG. 7 shows, for a relatively small refrigerator having a box size of 600 m in width and 664 mm in depth and a single refrigerating compartment door, the pressing force applied to each heat insulating door after packaging, the lower freezing compartment door and the vegetables. FIG. 10 is a table showing the amount of packing collapse of a chamber door; FIG. On the other hand, FIG. 8 shows a comparatively large refrigerator with a box size of 685 m in width and 738 mm in depth, and a refrigerating compartment door having a French door. and the amount of crushed packing of the vegetable compartment door. It should be noted that the pressing forces in FIGS. 7 and 8 are values obtained by averaging the pressing forces measured at a plurality of points on each door.

As shown in FIGS. 7 and 8, when the same thickness of the stretch film 20 is used, it can be seen that the pressing force applied to each door after packaging is greater in the large-sized refrigerator than in the small-sized refrigerator. . This is because the stretch film 20 stretches more in a large-sized refrigerator and has a stronger contraction force. It can also be seen that the thicker the stretch film 20, the greater the pressing force applied to each door after packaging.

Next, consider the thickness of the stretch film 20 that satisfies the condition that the packing collapse amount is 2 mm or less. The thickness of the stretch film 20 is based on the thickness when it is not stretched.

As shown in FIG. 7, a small refrigerator satisfies the conditions if the stretch film 20 has a thickness of 70 μm or less. However, as shown in FIG. 8, a large refrigerator does not satisfy the conditions unless the stretch film 20 has a thickness of 50 μm or less. Therefore, the thickness of the stretch film 20 may be changed according to the size of the refrigerator. However, considering production efficiency, it is desirable to share the stretch film 20 to be used. Therefore, in this embodiment, a common stretch film 20 having a thickness of 50 μm or less is used for packaging refrigerators of different models.

In addition, it was confirmed that the stretch film 20 having a thickness of 50 μm before packaging was restored to 33 μm in the part facing the corner of the refrigerator when unpacked after packaging, and restored to 45 μm in other parts. was done. It is thought that the corners of the refrigerator are pulled with a greater force than the other portions and are stretched greatly.

Further, according to FIGS. 7 and 8, in order to reduce the amount of packing collapse of the lower freezer compartment door and the vegetable compartment door to 2 mm or less, the pressing force of the refrigerator compartment door where the pressing force of the stretch film 20 is the largest is It can also be seen that 99N or less is sufficient. The reason for this pressing force of 99N is based on the pressing force of the refrigerator compartment door in the case of the film thickness of 70 μm in FIG.

DESCRIPTION OF SYMBOLS 1... Refrigerator 2... Refrigerating compartment 2a... Refrigerating compartment door 3... Ice-making compartment 3a... Ice-making compartment door 4... Upper freezer compartment 4a... Upper freezer compartment door 5... Lower freezer compartment 5a... Lower freezer compartment Door 6 Vegetable compartment 6a Vegetable compartment door 71 Top plate 72 Side plate 73 Back plate 8 Power cord 9 Power plug 10 Carrying handle 11 Base part 12a Inner base 12b Outer base 13 Handle 14 Screw boss 15 Recess 16 Hook 20 Stretch film 21 Mark 30 Styrofoam 40 Cardboard

Claims

A refrigerator in which a box body having a drawer-type door and a rotating door is wrapped with a stretch film,
The refrigerator, wherein the stretch film presses the drawer-type door with a pressing force of 99 N or less.
In the refrigerator according to claim 1,
The refrigerator, wherein the stretch film has a cylindrical cross section and can be stretched outward around the hole.
In the refrigerator according to claim 2,
A refrigerator in which a hole in the stretch film is located at a position corresponding to the top surface of the box.
In the refrigerator according to claim 3,
A refrigerator in which the stretch film has a non-stretched portion and the hole is covered by the stretch film.
In the refrigerator according to claim 1,
The upper end of the stretch film is higher than the upper end of the box,
A refrigerator in which the lower end of the stretch film is higher than the lower end of the box.
In the refrigerator according to claim 1,
The stretch film has a mark for unpacking,
The mark extends in the vertical direction so as to straddle the concave portion on the front side of the refrigerator existing between the adjacent upper and lower doors.
In the refrigerator according to claim 1,
The box has a handle for transportation,
A refrigerator in which a space is formed by the carrying handle and the stretch film.
In the refrigerator according to claim 7,
A refrigerator in which a power plug or a power cord is accommodated in the space.
In the refrigerator according to claim 1,
The refrigerator, wherein the stretch film has a thickness of 50 μm or less when not stretched.
In the refrigerator according to claim 1,
A refrigerator in which the stretch film presses the rotating door with a pressing force of 99 N or less.