JP4036711B2 - Storage - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a storage that supports left and right side walls of a container with left and right portions in the container storage chamber in the storage so that the container can be pulled out in the front-rear direction.
[0002]
[Prior art]
In a storage such as a refrigerator, as a container support device configured such that the left and right side walls of a container are supported by the left and right portions in the container storage chamber in the storage and can be pulled out in the front-rear direction, Rails are provided in the front-rear direction, and placing portions formed on the left and right side walls of the container are placed on the rails, and the container is supported so as to be slidable in the front-rear direction. In this configuration, it is difficult to obtain a smooth slide by shaking the container in the left-right direction when the container is pulled out and stored. In addition, there are those that attach a protrusion to the side wall of the container storage chamber in order to limit the horizontal shaking of the container, and those that attach a stopper to the side wall of the container storage chamber to limit the pulling position of the container forward. In such a configuration, there are problems such as an increase in the number of parts, a complicated structure, and an increase in installation work.
[0003]
[Problems to be solved by the invention]
In consideration of such points, the present invention restricts the movement of the container in the left-right direction, and the specific configuration of the rail portion that supports the container simplifies the structure and reduces the back-and-forth slide resistance of the container. Provided is an apparatus capable of smoothly performing container drawing and storage operations.
[0004]
[Means for Solving the Problems]
The storage of the present invention is such that the left and right side walls of the container are slidably supported by the left and right portions of the container storage chamber in the storage so that the container can be pulled out in the front-rear direction. A support portion having a downward protruding ridge portion that slides on the rail surface of the upper surface of the rail portion is formed on the side wall of the container, and the protruding portion is disposed in the front-rear direction at the front portion of the rail portion. A stopper portion that is slidably fitted in the groove and has a width that restricts movement of the convex portion in the left-right direction, and a part of the support portion abuts on the rear side of the groove at a position where the container is pulled out. Is formed.
[0005]
As a result, the container is restricted from moving in the left-right direction due to the fitting relationship between the groove and the ridge, so that the forward / backward slide operation can be performed smoothly. And a rail part is formed in the baseplate of a container storage chamber, and it forms in the container side in order to form the groove part for restricting the right-and-left movement of a container in this rail part, and the stopper part which restricts the drawer position of a container. The relationship between the locking part and the ridge part is easy to determine. In addition, the configuration is simplified as compared with the case where the rail portion and the stopper portion are formed separately from the bottom plate of the container storage chamber, and the incorporation into the refrigerator or the like is also simplified.
[0006]
In the storage of the present invention, the left and right side walls of the container are slidably supported by the left and right portions of the container storage chamber in the storage, and the container can be pulled out in the front-rear direction. Forming a rail portion in a direction, forming a support portion having a downward protruding ridge portion that slides on the rail surface of the upper surface of the rail portion on the side wall of the container, and the protruding portion on the front portion of the rail portion Is formed so as to be slidable in the front-rear direction and to form a pair of left and right walls forming a groove having a width that restricts movement of the ridges in the left-right direction, and is formed on the support portion by pulling out the container Is configured to abut against the rear end of at least one of the left and right walls.
[0007]
Thus, in addition to the above functions and effects, by forming the groove portion at the front portion of the rail portion, it is possible to suppress the sliding resistance with the convex strip portion and to simplify the work of combining the container with the rail portion. . And since the stopper part which restrict | limits the drawer position of a container can also utilize the rear surface of the right and left wall of a groove | channel, formation of a stopper part becomes easy.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described. Each drawing shows an embodiment of the present invention, FIG. 1 is a perspective view of the configuration of the container support device of the present invention, FIG. 2 is a perspective view of the main part of the container support device of the present invention, and FIG. 4 is a front view of a refrigerator to which the container support device of the present invention is applied, FIG. 5 is a front view of the refrigerator main body of FIG. 4, FIG. 6 is a longitudinal side view of the refrigerator main body of FIG. FIG. 8 is an explanatory diagram of a state in which the container is stored in the container storage chamber of FIG. 5, FIG. 8 is an explanatory diagram of a state in which the container is removed from the container storage chamber of FIG. 5, and FIG. .
[0009]
It demonstrates based on the refrigerator which is one of the storages based on this invention. In the figure, the refrigerator 1 has a configuration in which a main body 2 having a full opening is partitioned to form a plurality of storage chambers, and the front surfaces of these storage chambers can be opened and closed by doors. The refrigerator body 2 has a heat insulating structure in which a foam heat insulating material 2C is filled between an outer box (outer wall plate) 2A and an inner box (inner wall plate) 2B. In the refrigerator main body 2, a refrigerator compartment 3, a vegetable compartment 4, an upper freezer compartment 5, an ice making compartment 7, and a lower freezer compartment 6 are partitioned from the top, and the refrigerator compartment 3 is provided at the bottom of the refrigerator compartment 3. 3 and a specific low temperature chamber 9 partitioned by a partition plate (partition wall) 8 is provided. The upper freezer compartment 5 can also be referred to as a switching compartment because it can be manually operated by a cold air amount adjusting device to be a refrigerator compartment.
[0010]
The front opening of the refrigerating room 3 is closed by a revolving refrigerating room door 10 that is opened and closed by being pivoted laterally by a hinge device on one side of the refrigerator body 2. The front opening of the vegetable compartment 4 is closed by a drawer-type door 11 that is drawn forward together with a vegetable container 15 supported so as to be drawn in the front-rear direction by left and right rails or roller devices 121 provided in the vegetable compartment 4. The upper freezer compartment 5 and the lower freezer compartment 6 are each drawn out forward together with the containers 16 and 17 supported so as to be able to be drawn out in the front-rear direction with respect to the left and right rails provided in the freezer compartment. The doors 12 and 13 are closed.
[0011]
In the ice making chamber 7, an automatic ice making machine 18 is provided at the top, and an ice storage container 19 is disposed at the bottom. As with the vegetable compartment 4, the ice storage container 19 is supported so that it can be pulled out in the front-rear direction with respect to the left and right rails provided on the left and right walls in the ice making chamber 7, and the drawer that opens and closes the front opening of the ice making chamber 7. It is a mechanism that is pulled forward together with the ceremony door 14. Reference numeral 20 denotes a water supply container for storing ice making water supplied to the automatic ice making machine 18. The water supply container 20 is disposed in a small chamber 46 formed by partitioning the side of the specific low temperature chamber 9 by a partition wall 45 in the refrigerator compartment 3. The front door 10 can be opened and removed forward. The ice making water is sucked up by the pump 21 from the water supply container 20 and supplied to the ice making tray 23 of the automatic ice making machine 18 through the water supply pipe 22.
[0012]
Reference numeral 24 is a refrigerant compressor for the refrigeration system, and 25 is a refrigerant condenser for the refrigeration system. Reference numeral 26 denotes an evaporating dish for evaporating defrosted water, which will be described later, by the heat of the condenser 25. The evaporating dish 26 is placed on the condenser 25 and can be pulled out from the lower front of the refrigerator body 2. The compressor 24, the condenser 25, and the evaporating dish 26 are installed in a machine room 28 provided at the lower part of the refrigerator body 2. Reference numerals 29 and 30 denote refrigerant evaporators (coolers) of the refrigeration system. 31 is a first blower that circulates the cold air cooled by the first evaporator (cooler) 29 to the upper freezer compartment 5, the lower freezer compartment 6, and the ice making compartment 7, and 32 is cooled by the second evaporator (cooler) 30. The second blower circulates cold air to the refrigerator compartment 3, the vegetable compartment 4, and the specific low temperature compartment 9. Reference numeral 33 denotes a defrosting glass tube heater of the first evaporator (cooler) 29, and reference numeral 34 denotes a defrosting glass tube heater of the second evaporator (cooler) 30. The defrost water from the first evaporator (cooler) 29 and the second evaporator (cooler) 30 is led to the evaporating dish 26 through the drain pipe and is evaporated there. Reference numeral 35 denotes a cold air duct through which the cold air cooled by the second evaporator (cooler) 30 is guided from the second blower 32, and is widely arranged on the upper wall of the refrigerator compartment 3, and its front end is a front opening of the refrigerator compartment 3. It communicates with the cold air outlet 36 formed on the upper surface. The cold air blown out from the cold air outlet 36 forms a cold air curtain 37 that flows from the top to the bottom as indicated by the arrow in the front opening of the refrigerator compartment 3. The cold air cooled by the first evaporator (cooler) 29 and the cold air cooled by the second evaporator (cooler) 30 are circulated as indicated by arrows by the first blower 31 and the second blower 32, respectively, and each chamber is circulated. Cool to a predetermined temperature.
[0013]
In such a configuration, the temperature of each chamber is maintained at about 3-4 ° C. in the refrigerator compartment 3 and about 4-6 ° C. in the vegetable compartment 4, and the upper freezer compartment 5, the lower freezer compartment 6, and the ice making compartment 7 are further maintained. It is about -18 degreeC--20 degreeC. Moreover, it is 5-8 degreeC on the storage shelf 38 provided inside the refrigerator compartment door 10. FIG. The specific low-temperature chamber 9 is a chilled chamber of about 1 ° C. higher than 0 ° C., an ice greenhouse of about 0 to 1 ° C. lower than 0 ° C. and higher than the freezing temperature of food, It may be a partial freezing chamber at about −4 ° C. so that a thin ice layer is formed on the surface. As described above, the specific low temperature chamber 9 is used for refrigerated storage of food in a specific temperature range, and requires stricter temperature control than other rooms.
[0014]
In the specific low temperature chamber 9, a synthetic resin container 50 having an upper surface opening is provided so as to be slidable back and forth in order to store food. The specific low temperature chamber 9 is a container storage chamber in the storage according to the present invention. The container 50 can be pulled out in the front-rear direction by supporting the left and right side walls 51, 52 of the container 50 with the left and right side wall portions in the specific low temperature chamber 9. The left side wall in the specific low temperature chamber 9 corresponds to the partition wall 45, and the right side wall in the specific low temperature chamber 9 corresponds to the inner box (inner wall plate) 2 </ b> B of the refrigerating chamber 3 that constitutes the main body 2. Reference numeral 118 denotes a flap provided at the upper part of the front surface of the specific low-temperature chamber 9 and is configured to be axially supported by the partition plate 8 or the like so as to contact the drawn-out container 50 and rotate forward.
[0015]
On the left side wall 51 of the container 50, a support part 53 extending horizontally in the front-rear direction and a support projection 54 at the upper rear part thereof are integrally formed with the left side wall 51 at the lower part. The support part 53 forms a downward convex part 61 extending horizontally in the front-rear direction on the lower surface of the left end. Then, on the left side wall 45 in the specific low temperature chamber 9, the rail portion 100 extending in the front-rear direction corresponding to the support protrusion 54 and the convex portion 61 of the support portion 53 are placed. Is provided. The rail portion 100 has rail portions 101 and 102 extending in the front-rear and horizontal directions close to the top and bottom of the support protrusion 54. The support portion 53 and the support portion 58 constitute a front support device, and the support protrusion 54 and the rail portion 100 constitute a rear support device, thereby constituting the left side support device of the container 50.
[0016]
Further, the right side wall 52 of the container 50 is provided with a support part 55 extending horizontally in the front-rear direction and a support projection 56 at the upper rear part thereof integrally with the right side wall 52. A rail portion 110 extending horizontally in the front-rear direction corresponding to the support protrusion 56 is integrally formed on the right side wall 2B in the specific low temperature chamber 9, and the right end of the synthetic resin bottom plate 71 of the specific low temperature chamber 9 is provided. The part is formed with a rail part 60 extending horizontally in the front-rear direction corresponding to the support part 55 by integral molding. A downward convex portion 62 extending horizontally in the front-rear direction is formed on the lower surface of the right end of the support portion 55, and a locking portion 67 protruding downward is formed at the rear portion of the support portion 55. When the convex portion 62 slides on the rail surface 65 on the upper surface of the rail portion 60, the locking portion 67 has a shorter protruding length than the convex portion 62 so as not to contact the rail surface 65. It is the composition which does not become.
[0017]
In the front portion of the rail portion 60, a pair of left and right walls 66A, 66B integrally formed with the rail portion 60 is formed integrally with the rail portion 60 in the front-rear direction. The bottom surface of the groove 70 is flush with the rail surface 65 on the top surface of the rail portion 60. The pair of left and right walls 66A and 66B may have the same length, but the right wall 66B is formed long in the front-rear direction of the rail portion 60 to restrict the movement of the container 50 to the right. The groove 70 has a width that fits the ridge 62 so as to be slidable in the front-rear direction and restricts movement of the ridge 62 in the left-right direction. For this reason, the groove 70 has a width that is the same as or slightly wider than the left and right width of the protrusion 62, and the left and right side walls of the groove 70 have a shape that spreads outward from the bottom of the groove 70. This restricts the movement of the ridge 62 in the left-right direction and facilitates insertion of the ridge 62 into the groove 70 when the container 50 is set in the specific low temperature chamber 9.
[0018]
As an example, the left and right thickness of the ridge 62 is 4.5 mm, the width of the bottom surface of the groove 70 is 4.5 mm, and the height of the left and right walls 66A and 66B from the bottom of the groove 70 is 3 mm. The left and right walls extend from the bottom surface of the groove portion 70 to the height of the left and right walls 66A and 66B with an inclination of 45 °. For this reason, even if the container 50 swings left and right and the convex portion 62 climbs this inclination, it easily returns to the bottom of the groove 70. The convex part 62 of the support part 55, the rail part 60, and the right side support apparatus of the container 50 are comprised. The rear end portion of the convex portion 62 is formed with a slope 62 </ b> A with a corner cut away, so that when the container 50 is set in the specific low temperature chamber 9, the convex portion 62 can be easily inserted into the groove 70. Yes. The same effect can be obtained by setting the width of the bottom surface of the groove 70 to 4.5 mm to 5.5 mm.
[0019]
The upper rail portion 101 and the lower rail portion 102 projecting from the left side wall 45 in the specific low temperature chamber 9 which is a container storage chamber above and below the support projection 54 form inclined surfaces 80 and 85 which are inclined obliquely forward in the middle portion. The rail portions 81 and 86 behind the inclined surfaces 80 and 85 are in a relationship of maintaining a higher position than the rail portions 82 and 87 in front of the inclined surfaces 80 and 85. If the height difference T2 between the rear rail portion 81 and the front rail portion 82 formed on the lower surface of the upper rail portion 101 is several mm, the object is achieved, but in the embodiment, it is configured to 2 mm. The height difference between the rear rail portion 86 and the front rail portion 87 formed on the upper surface of the lower rail portion 102 is the same.
[0020]
In a state where the container 50 is pushed into a predetermined position in the specific low temperature chamber 9, the convex part 62 is formed on the rail surface 65 of the rail part 60 on the right side of the container 50 due to the load of the container 50 and the article stored therein. It is in a state of being placed and positioned in the groove 70. The support protrusion 56 is in a state slightly separated below the rail part 110. On the left side of the container 50, the convex portion 61 is placed on the support portion 58, and the container 50 is supported with the support protrusion 54 placed on the rail portion 86 behind the lower rail portion 102. There is a slight gap T <b> 1 between the rail portion 101 and the rear rail portion 81. This gap T1 is for preventing the contact between the support protrusion 54 and the upper rail portion 101 and reducing the pull-out resistance of the container 50. In the embodiment, the gap T1 is 2 mm. Thus, in a state where the left and right sides of the container 50 are supported, the container 50 can slide in the front-rear direction.
[0021]
In this state, when the container 50 is pulled forward, the container 50 moves forward while the convex portion 62 remains in the groove portion 70. Between the bottom surface of the container 50 and the bottom plate 71 of the specific low temperature chamber 9, a cooling air passage is formed below the bottom wall of the container 50, and a distance of about 10 to 20 mm so as not to cause sliding resistance of the container 50. 72 is formed, and when the container 50 is pulled forward, the support protrusions 54 and 56 move toward the front of the specific low temperature chamber 9. As a result, the right and left support portions of the container 50 are closer to the rear part of the container 50, so that the front part of the container 50 is inclined downward toward the space 72 due to the load of the container 50 and the stored items therein. Become a trend.
[0022]
However, since a height difference T2 is formed between the rear rail portion 81 and the front rail portion 82, the front of the support projection 54 passes the slope 80 while the container 50 is pulled out in the horizontal direction. It corresponds to the rail portion 82. By pulling the container 50 further forward from this position, the support protrusion 54 is kept in contact with or in close proximity to the front rail portion 82, while the container 50 is pulled out to the front so that a part of the support portion 55 is pulled out. The locking portion 67 is abutted against at least one rear end portion of the pair of left and right walls 66A and 66B and is restricted. In the illustrated embodiment, the locking portion 67 is restricted by coming into contact with the rear end portion 68 of the wall 66A. In addition, the rail part 60 may be configured such that a stopper part with which the locking part 67 abuts is formed on the rear side of the groove 70.
[0023]
When the container 50 is pulled forward, the height difference T2 is maintained between the rear rail portion 81 and the front rail portion 82 so as to prevent the front side of the container 50 from being greatly inclined downward. Are connected. In addition, between the rear rail part 86 and the front rail part 87, the height difference T2 is maintained and the both are continuously connected with an inclination 85. For this reason, when the container 50 is pulled forward, the support protrusion 54 comes into contact with or very close to the front rail portion 82 in the course of the process in which the support protrusion 54 passes the slope 80 and the container 50 is pulled out in the horizontal direction. If it changes to a state, it will be suppressed that the front side of the container 50 falls by the load of the container 50 and a storage thing.
[0024]
It is preferable that the horizontal state of the container 50 is maintained during the drawing process of the container 50, and for this purpose, the support protrusion 54 corresponds to the front rail portion 82 before the front side of the container 50 tends to be lowered. It is preferable to shift, and it is sufficient to provide an inclination 80 at such a position. In normal use, the slope 80 may be provided approximately in the middle of the drawing process of the container 50.
[0025]
As is apparent from the above, in order to prevent the container 50 from being lowered when the container 50 is pulled out, the relative distance T4 between the rear rail portion 86 of the lower rail portion 102 and the front rail portion 82 of the upper rail portion 101 is substantially supported by a protrusion. What is necessary is just to form in height T3 of 54 up and down. In other words, the lower surface of the front rail portion 82 of the upper rail portion 101 is at the height T3 of the support protrusion 54 or substantially at the height T3 position with respect to the extension line of the rear rail portion 86 of the lower rail portion 102. When the rear rail portion 81 and the front rail portion 82 are made continuous by the inclination 80, it can be seen that the container 50 can be pulled out and stored in a horizontal state.
[0026]
In the above embodiment, as a device that suppresses the forward drop when the container 50 is pulled out, a support device having the configuration of the upper rail portion 101 and the lower rail portion 102 of the container 50 and the support protrusion 54 is provided on the left side of the container 50. Further, by providing devices on the left and right sides of the container 50 that prevent the container 50 from being lowered when the container 50 is pulled out, a more stable operation can be obtained. For this reason, the lower surface of the rail part 110 corresponding to the support protrusion 56 on the right side of the container 50 is defined as a rear rail part 111 and a front rail part 112, and the two are continuously connected by a forward-declining slope 113. What is necessary is just to comprise the dimensional relationship with the back rail part 111 and the front rail part 112 in the relationship between the support protrusion 54 and the back rail part 81 and the front rail part 82 of the upper rail part 101. FIG.
[0027]
In this configuration, when the container 50 is stored at a predetermined position, the support protrusion 56 is located away from the rear rail portion 111, and when the container 50 is pulled out, the support protrusion 56 is the lower surface of the front rail portion 112. In contact with or very close to. As a result, the left and right sides of the container 50 can be held in a state in which the front drop is suppressed when the container 50 is pulled out.
[0028]
In the above embodiment, the support structure on the left and right sides of the container 50 is different, but the right support structure of the container 50 may be applied to the left side. Further, the support structure on the right side of the container 50 can be applied to both the left and right sides of the container 50. That is, the support structure on the right side of the container 50 may be configured on at least one of the left and right side walls of the container 50.
[0029]
In the present invention, as described above, the rail portion 60 in the front-rear direction is formed on the bottom plate 71 of the container storage chamber 9, and the downward protruding strip 62 that slides on the rail surface 65 on the top surface of the rail portion 60 is formed on the side wall of the container 50. The support portion 55 provided is formed, and a groove 70 having a width for restricting movement of the protrusion 62 in the left-right direction is formed in the front portion of the rail portion 60 while the protrusion 62 is slidably fitted in the front-rear direction. A pair of left and right walls 66A and 66B is formed, and a locking portion 67 formed on the support portion 55 by pulling out the container 50 is in contact with at least one rear end portion 68 of the walls 66A and 66B. Thus, since the rail part 60, the groove | channel 70 comprised by the walls 66A and 66B, and the stopper part 68 are integrally formed in the bottom plate 71 of the container storage chamber 9, the latching | locking part 67 formed in the container 50 side is formed. And the relationship with the protruding item | line part 62 is easy to determine, and the integration in a refrigerator is also simplified.
[0030]
The present invention is not limited to the refrigerator of the above embodiment, can be applied to various forms of refrigerators and thermostats, warm storage, freezer, etc., various modifications can be considered without departing from the technical scope of the present invention, It includes various embodiments relating thereto.
[0031]
【The invention's effect】
According to the first aspect of the present invention, since the container is restricted from moving in the left-right direction due to the fitting relationship between the groove and the ridge, the front / rear slide operation can be performed smoothly. And a rail part is formed in the baseplate of a container storage chamber, and it forms in the container side in order to form the groove part for restricting the right-and-left movement of a container in this rail part, and the stopper part which restricts the drawer position of a container. The relationship between the locking part and the ridge part is easy to determine. In addition, the configuration is simplified as compared with the case where the rail portion and the stopper portion are formed separately from the bottom plate of the container storage chamber, and the incorporation into the refrigerator or the like is also simplified.
[0032]
According to the invention of claim 2, in addition to the effect of claim 1, by forming the groove part at the front part of the rail part, it is possible to suppress the sliding resistance with the ridge part and to combine the container with the rail part. It will also be easy. And since the stopper part which restrict | limits the drawer position of a container can also utilize the rear surface of the right and left wall of a groove | channel, formation of a stopper part becomes easy.
[0033]
In addition, the inner surface of the groove on the left and right walls forming the groove has an inclined shape that widens as it goes upward, so that the protruding portion of the container can be easily fitted into the groove, and the container can be easily installed in the container storage chamber. It becomes. And even if a container shakes right and left and a protruding item | line part climbs this inclination, the return | restoration toward the bottom face of a groove | channel is quick, and stabilization of a container slide can be anticipated.
[Brief description of the drawings]
FIG. 1 is a configuration perspective view of a container support device of the present invention.
FIG. 2 is a perspective view of an essential part of the container support device of the present invention.
3 is a cross-sectional view corresponding to the AA portion of FIG.
FIG. 4 is a front view of a refrigerator to which the container support device of the present invention is applied.
5 is a front view of the refrigerator main body of FIG. 4. FIG.
6 is a vertical side view of the refrigerator main body of FIG.
7 is an explanatory diagram of a state in which a container is stored in the container storage chamber of FIG.
8 is an explanatory view showing a state in which a container is removed from the container storage chamber of FIG.
FIG. 9 is an explanatory diagram of a state when the container is stored and pulled out according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Refrigerator 2 ... Refrigerator main body 3 ... Refrigeration room 9 ... Specific low temperature room (container storage room)
10 .. refrigerator compartment door 50 .. container 54 .. support projection 56 .. support projection 60 .. rail portion 62 .. ridge portion 65 .. rail surfaces 66A and 66B. Stop part 68 ..Stopper part 70 ..groove 71 ..bottom plate 101 of specific low temperature chamber (container storage chamber) .. upper rail part 102..lower rail part 110..rail part

Claims (2)

In a storage that allows the left and right side walls of the container to be slidably supported by the left and right portions of the container storage chamber in the storage, and the container can be pulled out in the front-rear direction, the rails in the front-rear direction are formed in the container storage chamber, A support portion having a downward protruding ridge portion that slides on a rail surface on the upper surface of the rail portion is formed on the side wall of the container, and the protruding portion is slidably fitted in the rail portion so as to be slidable in the front-rear direction. A groove having a width that restricts movement of the portion in the left-right direction is formed, and a stopper portion with which a part of the support portion abuts at a position where the container is pulled out is formed on the rear side of the groove. . In a storage that allows the left and right side walls of the container to be slidably supported by the left and right portions of the container storage chamber in the storage, and the container can be pulled out in the front-rear direction, a rail portion in the front-rear direction is formed on the bottom plate of the container storage chamber, A support portion having a downward protruding ridge portion that slides on the rail surface on the upper surface of the rail portion is formed on the side wall of the container, and the protruding portion is slidably fitted in the front portion of the rail portion so as to be slidable in the front-rear direction. And a pair of left and right walls forming a groove having a width that restricts the movement of the ridge portion in the left-right direction, and a locking portion formed on the support portion by pulling out the container is at least one of the left and right walls A storage that contacts the rear end of the storage.

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