JP2006162229A - Shelf device, and refrigerator provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shelf device, and a refrigerator provided with the same wherein a shelf height can be vertically moved by simple and light operation even when an installation position is high, handiness of storage is improved by holding a shelf container in a stopped state in a low position when it is pulled down when there is food in the shelf container as a matter of course, but also when it is empty, and a vertical motion mechanism of the shelf container is compactified. <P>SOLUTION: The shelf device, and the refrigerator provided with the same are comprised of a movable rail 8 horizontally sliding in a fixed rail 7 fixed to a storage chamber 2, a spring member 16 rotatably supporting arms 9 and 10 in the movable rail, with one end held in the movable rail and another end interlocked with rotation of the arms to apply torque to the arms, and the shelf container 6 held between arm tips. The shelf container moves fore and aft in the movable rail, the shelf container is vertically moved by rotation of the arms toward a forward down part, and downward rotation is stopped by pulling the spring member, and pressing an impact absorbing damper 17 provided on the same straight line as the spring member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shelf device, and in particular, a shelf device capable of changing the front and rear and the vertical position in a storage shelf such as a food placement shelf, a container, a cupboard, or a kitchen or a warehouse provided in a storage room of a refrigerator, and the shelf device. It relates to the refrigerator provided.

  In recent years, for example, refrigerators and kitchen storage shelves have a tendency to increase in storage capacity along with diversification of eating habits, and in particular, in household refrigerators, the class in which storage capacity exceeds 400 liters has become mainstream. The external height of the main body is about 180 cm, and the width and depth dimensions tend to increase.

  And as a form of refrigerator, the refrigerator compartment with the largest storage capacity is arranged at the top of the main body, and the bottom position of the uppermost shelf in the refrigerator compartment is about 160 cm above the floor surface, so the depth dimension is also deep For those who are short, it is often difficult to store and remove food from the top shelf, and it is also difficult to check the storage state, especially at the back of the shelf. It was a space.

  On the other hand, as shown in FIG. 8, Patent Document 1 relating to the application of the applicant of the present invention has fixed rails (57) arranged on both upper side walls of the refrigerator compartment (52), and this fixed rail ( 57) The front and rear arms (59) and (60) are pivotally supported on a movable rail (58) provided with a pulley that slides horizontally in the rack, and the arms between the arms (59) and (60) on both sides are supported by shelves. (61) and a shelf holder (61 '), and the shelf container (56) is placed on the shelf support (61) and the shelf holder (61') and fixed with a shelf fixture (71). By moving the shelf container (56) forward with the rail (58) and rotating the arms (59) (60), the shelf container (56) can be moved up and down while maintaining the horizontal state. A shelf device that is easy to reach and is easy to use is shown.

The shelf container having the above-described configuration has an advantage that the usability of the drawer storage including the vertical movement of the uppermost shelf is improved, while FIG. 9 which is a partial detailed view of FIG. 8 and an exploded perspective view of FIG. 9 viewed from the inside. As shown in FIG. 10, when the swirl spring (66) is used to rotate the arms (59) (60) and the shelf container (56) is rotated to the lower front, it depends on the weight of the shelf container mechanism. When the descending speed is suppressed and the rearward upper part is raised, an ascending force is applied to the shelf container (56) to reduce the load for lifting.
Japanese Patent Laid-Open No. 2004-53211

  The vertical movement mechanism of the shelf container (56) maintains the stopped state by storing 1 kg of food, for example, when the shelf container (56) is in the lower position, based on experimental data on usability in various storage states. When the food container is not stored, if the hand is released from the shelf container, the lifting force by the spiral spring (66) increases, and the shelf container (56) moves upward. Will end up.

  Therefore, when the empty shelf container (56) is pulled down to store new food, it is necessary to hold the shelf container at the lower position, and both hands should be used when storing relatively large or heavy items. In addition to the inconvenience that cannot be used, the above-described vertical movement mechanism of the shelf container is complicated and the volume occupied in the refrigerator is large.

  The present invention has been made in consideration of the above points, and even if the installation position in the storage and storage room is high, the shelf height position can be moved up and down with a simple and light operation, and the food can be moved in a vertically movable shelf container. Of course, even when the container is in the loading state, even when it is empty with no stored items, the shelf container is held in the down position when pulled down to improve the usability of storage, and the shelf container can be moved up and down. It is an object of the present invention to provide a shelf device with a compact mechanism and an increased food storage capacity, and a refrigerator equipped with the shelf device.

  The shelf device of the present invention includes a fixed rail fixed to a side wall of a shelf space provided in the upper part of the storage room, a movable rail that slides horizontally in the fixed rail, and an arm that pivotally supports the movable rail. A spring member that holds one end on a movable rail and interlocks the other end with the rotation of the arm to urge the arm to rotate upward, and a shelf container held between the rotating tips of the arms on both sides The shelf container is moved back and forth by the movable rail, the shelf container is moved up and down while maintaining a horizontal state by the rotation of the arm, and the spring member In addition, the arm is configured to stop the downward rotation of the arm by pulling it against the shock and pressing and locking the shock absorbing damper provided almost on the same straight line as the spring member. Is.

  According to this invention, even if it is a shelf container in the uppermost position of the room, the shelf height position can be moved up and down to obtain a shelf container device with good food storage and retrieval properties, and in the shelf container Even in an empty state where no food is stored, the shelf container can be held in a stopped state at the lower position when it is pulled down, so there is no need to hold the shelf container so as not to move upward, and it is relatively large. When storing something heavy or heavy, it can be done with both hands, improving usability. In addition, the vertical movement mechanism of the shelf container can be made compact to increase the storage volume efficiency of food and the like.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the inside of the refrigerator compartment (2) disposed at the top of the refrigerator main body (1) composed of a heat-insulating cabinet, and the refrigerator compartment (2) and a vegetable room (not shown) disposed below the refrigerator compartment (2). The storage room other than the freezer compartment is formed by an inner box (3) provided through a heat insulating material inside the outer box.

  The refrigerating room (2) has a configuration in which cold air generated by a cooler (not shown) provided on the back surface of the refrigerating room (2) is introduced into the room through a duct from the fan and cooled by a cold air discharge port. A storage space for refrigerated food is formed by dividing into a plurality of storage units by a storage shelf (5).

  (6) is a shelf container installed over the full width at the uppermost part in the refrigerator compartment (2). The shelf container is formed in a container shape with a peripheral wall, and the front surface is a low wall with a large opening up and down. . The back wall is made slightly lower to make it easier to introduce the cooling air from the fan on the back into the container, but the cold air duct is extended from the back wall of the refrigerator compartment (2) to the ceiling surface. The cooling efficiency may be improved by blowing out cool air from the upper surface.

  As shown in FIG. 3, the shelf container (6) has a fixed rail (7) horizontally disposed in the depth direction on the left and right side walls of the inner box (3), and the shelf container (6) is removed. The front arm (9) and the rear arm (10) that are pivotally supported on the base surface of the movable rail (8) that slides in the fixed rail (7), and the shelf support (11) can be rotated up and down with the back and forth movement. The shelf container (6) is placed and held at a predetermined position by the shelf support (11).

  Hereinafter, the front and rear and up and down movable configurations of the shelf container (6) will be described in detail. As shown in FIG. 2, which is a state where the shelf mechanism portion is viewed from the inside of FIG. 1, the fixed rail (7) is disposed in the depth direction at a predetermined height position above the refrigerator compartment (2). The depth of the shelf container (6) is such that when the door is closed, the inner pocket portion of the door (12) at the front opening of the refrigeration room protrudes considerably to the indoor side due to the recent increase in storage capacity. It is set to about half of the depth dimension of 2).

  In the fixed rail (7) having a U-shaped cross section, as shown in FIGS. 3 and 4, two pulleys (13) attached at a predetermined interval to the outer rear part in the longitudinal direction of the depth are horizontally arranged. A movable rail (8) that slides is provided on the inside of the base surface of the movable rail (8) on both sides so that the front arm (9) and the rear arm (10) are spaced apart and the lower part thereof is freely rotatable. The shelf support (11) can be rotated by rotating the front and rear arms by pivotally supporting and pivoting at the two action points (9a) and (10a) close to the front arms (9) and rear arms (10). Along the parallel movement. The action points (9a) and (10a) are located about 15 degrees behind the vertical upper portions of the shaft support portions (9b) and (10b). I have to.

  A holding frame (14) made of metal wire protruding forward and curved into a frame shape between the shelf supports (11) located on both side walls of the refrigerator compartment (2) and forming a horizontal shelf receiving portion The shelf container (6) is stably held by the movable rail (8) provided with the shelf support (11) and the holding frame (14), thereby providing a reinforcing structure to the shelf container itself. Instead, it moves on the fixed rail (7) in the front-rear direction, and the shelf containers (6) are arranged so as to be vertically rotatable while maintaining the horizontal state by the front-rear arms (9), (10).

  Outside the movable rails (8) on both sides, the rotation of the front and rear arms (9) (10) is controlled, and the movable rail (8) has moved to the locking position of the front end of the fixed rail (7). In this case, the front and rear arms (9) and (10) are allowed to rotate, the shelf support (11) is moved together with the front and rear arms, and the shelf container (6) placed on the shelf support (11) is moved downward. The cam body (15) is pivotally supported.

  The cam body (15) is formed of a substantially semicircular plate body, and the front arm (9) has a pivot point (9b) positioned at the front lower portion of the plate surface as a fulcrum. It is configured to rotate in conjunction with rotation, and when the shelf container (6) is in the upper part in the refrigerator compartment (2), that is, the front and rear arms (9) (10) are not rotated. In some cases, as shown in FIG. 4, the shaft support portion (9b) is located at the lower front portion of the cam surface, and the arc-shaped portion (15a) from the vicinity of the shaft support portion (9b) is disposed so as to reach the upper rear. .

  The upper surface of the arcuate portion (15a) in this state is in contact with the lower surface of the fixed rail (7), and the movable rail (8) is fixed to the fixed rail by the locking of the cam body (15) due to this contact. (7) The front and rear arms (9) and (10) are prevented from rotating until they slide horizontally inside and stop at the front end. Therefore, downward rotation while the shelf container (6) at the upper part is slidingly moved forward is prevented, and the food on the shelf (5) where the shelf container (6) is positioned downward is lowered. Prevents contact and damage.

  When the cam body (15) is separated from the lower surface of the fixed rail (7) by sliding forward of the shelf container (6), the locking state of the cam body (15) is released and the front and rear arms ( 9) The rotation of (10) becomes possible, and the end of the arcuate portion of the cam body (15) protrudes upward by rotation, and the contact between this protrusion and the front end of the fixed rail (7) The contact prevents horizontal movement of the movable rail (8) to the rear, and prevents the shelf container (6) from sliding directly from the lower position to the rear. Similarly to the above, this is to prevent contact with food on the lower shelf located at the rear when the shelf container (6) is directly moved backward from the lower position.

  As described above, as the cam body (15) is released from the locked state, the front and rear arms (9) and (10) can be rotated, and the shelf container (6) can be rotated and lowered. Then, the other end of the spring member (16) formed of a tension coil spring having one end locked to the rear end of the movable rail (8) is connected to the rear portion of the shaft support (9b) on the surface of the cam body (15) at the position of FIG. When the shelf container (6) is moved to the lowermost position by rotating the front and rear arms (9) (10), the cam body (15) 5 is in the state shown in FIG. 5 so that the counter position is rotated forward by an angle of about 180 degrees from the rear position.

  Therefore, even if the hand is released in this state, the locking portion of the other end of the spring member (16) to the cam body (15) is on the front side on the substantially straight line of the shaft support portion (9b). (15) Does not generate a large pulling force in the direction of rotation, and the shelf container (6) holds the stopped state without rotating upward, so that both hands can be used for storing food, making it easy to use. Can be improved more.

  When the shelf container (6) is slightly lifted, the cam body (15) rotates and the locking point of the spring member (16) moves upward, so that a tensile force is generated again, and the forearm (9 ), That is, the front arm is energized with upward and backward turning power.

  The spring member (16) is extended by the rotation of the cam body (15) interlocked with the rotation of the front and rear arms (9) and (10), and is extended when the shelf container (6) is rotated downward in the front part. When the shelf container (6) is moved to the upper rear part, the lifting force is applied to the shelf container (6) by the restoring force. It acts to reduce the load for lifting.

  Further, the rear end of the damper (17) extending forward along the movable rail (8) is brought into contact with the front edge of the cam body (15). This damper (17) is an oil damper that linearly compresses oil sealed in a cylindrical body with a piston, and the distance from the shaft support (9b) is interlocked with the rotation of the front and rear arms (9) and (10). It is pressed by the end face of the cam body (15) which becomes long, but the rotation of the cam body (15) is suppressed by a viscous resistance of the piston within a range of several tens of millimeters from the lowermost end stop portion of the shelf container (6). 9) Decreases the descent speed of (10) and performs shock absorption.

  The damping force of the damper (17) when the arm is lowered is larger than the biasing force of the spring member (16) for raising the shelf container so that the pushing-down force of the shelf container (6) when there is no load is appropriately light. At the same time, when the shelf container (6) is lowered, the rubber bush (18) at the front end is flexibly pressed against the stopper portion (19) provided on the movable rail (8), and the rotation is stopped at the lowest position. Prevent sudden descent and suppress impact.

  As shown in FIG. 6 which is a cross-sectional view, the cylindrical damper (17) is held by a damper cover (20) fixed to the front portion of the movable rail (8), and the outer shape of the damper (17). The damper (17) is slidably held back and forth on the inner surface side of the damper cover (20) matched to the above.

  At this time, a plurality of stepped portions (17a) are formed so that the outer diameter of the cylindrical damper (17) decreases toward the rear, and the stepped portion (20a) that engages with the damper cover (20) is also formed. ) And the stopper part (19) is formed integrally at the tip, the damper (17) slides smoothly in the cover (20) without the lateral movement of the damper (17) due to the rotation of the cam body (15). It can move and stop by contacting the stopper (19), and even when restored from the compressed state to the rear, it can smoothly return to the original state and be locked in place. The stopper portion (19) and the rear locking structure can be easily formed.

  In this embodiment, the damper is a piston type oil damper. However, the present invention is not limited to this, and any damper may be used as long as it absorbs impact and suppresses impact noise, such as a piston type or rotary type air damper.

  The shelf support (11) for connecting and fixing the front and rear arms is provided on the inner surface side of the front and rear arms (9) and (10), and the holding frame (16) is fastened together to store and hold the shelf container (6). Forming part. The shelf container (6) is supported and disposed between the shelf support mechanisms in the above state, the lower edge of the front end is fitted into the holding frame (16), and the upper edge is shelf-supported by the shelf fixture (21) ( 11) Removably locked to the top surface.

  As described above, the shelf mechanism unit in which the front and rear arms (9) and (10), the shelf support (11), the cam body (15), the spring member (16), the damper (17), and the like are integrally assembled, The movable rail (8) portion is inserted and arranged in the U-shaped groove of the fixed rail (7) from the front, and then the front opening of the fixed rail (7) is sealed with the front stopper (7a). The pulley (13) of the movable rail (8) contacts the front stopper (7a) and slides forward when the shelf container (6) is pulled out. Is stopped, and the attachment portion to the fixed rail (7) is formed of an elastic material such as rubber, so that the impact force applied to the front stopper (7a) of the pulley (13) is alleviated and the generation of sound is suppressed.

  Next, the operation of the present invention will be described. In the mounting state of the normal shelf container (6) in which the refrigerator compartment (2) is closed, the movable rail (8) is at the innermost part in the fixed rail (7), and the front and rear arms (9) together with it. (10) is also positioned at the rear of the movable rail (8) in a standing state, and the shelf container (6) is positioned and held at the back of the uppermost stage in the room.

  When the shelf container (6) is moved downward for storing food (22) or taking out the placed food, the movable rail (8) is a pulley if the front end of the shelf container (6) is gripped and pulled forward. Slide in the fixed rail (7) while being supported by (13) and move forward about 2/3 of the depth dimension.

  In this state, the cam body (15) attached to the movable rail (8) is prevented from rotating because the upper arc-shaped portion (15a) is in contact with the lower surface of the fixed rail (7). Since the front and rear arms (9) and (10) which are coaxially engaged with the cam body (15) are also prevented from rotating, the shelf container (6) does not move downward.

  When the movable rail (8) reaches the foremost end and the cam body (15) is detached from the front end of the fixed rail (7), the front arm (9) and the rear arm (10 ) Can be rotated.

  At this time, the cam body (15) fixed so as to be interlocked with the front arm (9) is in the state shown in FIG. 4, and the operating point (9a) (9b) of the arm with respect to the shaft stoppers (9a) (9b). Since it is rearward from the vertical upper position and the pulling force of the spring member (16) also acts, the stress initially acts upward with respect to the pulling force to the front, so that the pulling operation becomes resistance. Accordingly, since the shelf container (6) is moved forward, the food (22) may be stored and taken out in this state. When the shelf container is further moved to the lower front part, the shelf container ( 6) Hold the front edge and pull it down diagonally.

  As described above, the front and rear arms (9) and (10) rotate downward with the shaft support portions (9b) and (10b) as fulcrums, and the shelf supports (11) that are engaged with the respective action points (9a) and (10a). The shelf container (6) on the shelf support (11) descends to the front of the refrigerator main body opening one step below the shelf while maintaining the horizontal state, and becomes the state of FIG.

  The bottom surface position of the shelf container (6) at this lowest position was set to a height of 140 to 155 cm from the floor surface. Since the average height of a woman who is the main user of the refrigerator is 158 cm, the state of the stored food can be sufficiently visually confirmed by adjusting the position of the line of sight, and can be easily stored and taken out. .

  In the middle stage of lowering the shelf container (6), the arc-shaped part (15a) of the cam body (15) is rotated together with the front arm (9), so that the edge moves and protrudes upward. In this case, even if the user tries to push the shelf container (6) into the back, the arcuate portion (15a) of the cam body comes into contact with the front end edge of the fixed rail (7), so The container will not move backwards.

  Although the shelf container (6) and the shelf holding mechanism at the time of descending have a considerable weight including the weight of the loaded food, the spring body (16) whose end is locked to the cam body (15) The pulling force of the arm (9) suppresses the dropping speed of the arm (9), and the arm (9) can be lowered with an appropriate force. Further, when the shelf container (6) is lowered to a position near the lowermost part, Since the edge of (15a) presses the damper (17), the shock absorbing force gives resistance to the rotation of the front and rear arms (9) and (10), and the rubber bush (18) at the tip is connected to the stopper portion (19 ) To prevent the shelf container (6) from further descending and hold it in place.

  When returning the shelf container (6) in the lower position to the upper position, the front and rear arms (9) and (10) can be rotated upward by grasping the front end of the shelf container and lifting it obliquely upward, contrary to the lowering operation. For example, the cam body (15) rotates away from the damper (17), and the return force of the spring member (16) promotes the arm's turning and raising force, so that the shelf container (6) can be moved only by applying a light force. Can be raised. Therefore, when the shelf container (6) is raised, the cam body (15) is not affected by the damper (17), and the damper (17) naturally returns to its original state.

  When the shelf container (6) is raised, the cam body (15) is again in the state shown in FIG. 4 and can enter the lower surface of the fixed rail (7), so that the movable rail (8) slides backward. The shelf container (6) can be stored in a predetermined rear position at the top of the refrigerator compartment (2) by being pushed in.

  According to the above configuration, the spiral spring () in the vertical movement mechanism of the shelf container, which has been conventionally required, is arranged so as to be along the outside of the movable rail (8) as a spring member (16) made of a coil spring. A damper (17) is provided via a cam body (15) in a front part substantially collinear with the member (16), and the damper (17) is rotated by the rotation of the cam body (15) in conjunction with the rotation of the front arm (9). ) Is pushed forward and locked while obtaining a buffering action, so that the downward rotation of the arm is stopped, so the spring member (16), cam body (15) and damper (17) are straight And can be stored in a conventional invalid space outside the movable rail (8).

  9 and 10 showing the conventional example, and FIG. 11 which is a cross-sectional view from the front, and FIG. 7 which is a cross-sectional view of the same part of the present invention. In order to protect the finger from being caught between the spiral spring (66) and the spring part, the thickness (t) in the width direction of the vertical movement mechanism of the shelf container (56) by the cover body (70) covering the spiral spring is made unnecessary. The thickness can be reduced by reducing the thickness t ′ to ½ or less. By reducing the thickness, the width of the shelf container (6) itself can be increased in the present invention, and the food storage capacity is increased. can do. Moreover, the complexity of a shelf mechanism part can be eliminated and it can be simplified, and the refrigerator which has a shelf container vertical movement mechanism with a favorable external appearance can be obtained.

  In the said Example, when employ | adopting this invention structure as a shelf apparatus in a household refrigerator, not only a shelf container (6) is provided over the full width in a refrigerator compartment, but the inside of a refrigerator compartment (2) is widthwise. It may be divided by one or more partition plates, and the shelf device may be attached to each of the partition plates so that the shelf container (6) can be moved up and down.

  In addition, although the said embodiment demonstrated by the example employ | adopted as the mounting shelf in a refrigerator, this invention is not limited to this, A general container, a sliding shelf of tableware, a kitchen storage apparatus, a warehouse, etc. Of course, it may be adopted as a shelf configuration. Further, the shelf container is not in the shape of a container but may be a flat shelf similar to the mounting shelf in the lower part, and the position of adoption may not be the uppermost stage.

  INDUSTRIAL APPLICATION This invention can be utilized for the refrigerator provided with the shelf apparatus which can change the front-back and up-and-down position, and a shelf apparatus.

It is a partially-cutaway perspective view in the refrigerator compartment which shows one Embodiment of this invention. It is a perspective view which shows the shelf mechanism part in the refrigerator compartment in FIG. It is a detailed perspective view which shows the movable rail and shelf up-and-down moving mechanism of FIG. It is a side view of the shelf up-and-down movement mechanism located in the upper back of the room. It is a side view of the shelf up-and-down movement mechanism which shows the state which moved the shelf container to the lower part front. It is a cross-sectional view of the shelf moving mechanism shown in FIG. It is a front view of the shelf moving mechanism shown in FIG. It is a perspective view of the refrigerator which shows the prior art example of the same part as FIG. It is a detailed perspective view of the shelf mechanism part in FIG. It is a disassembled perspective view of the shelf mechanism part which looked at FIG. 9 from the room inner side. It is a front view which shows the prior art example of the same part as FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator body 2 Refrigerating room 5 Mounting shelf 6 Shelf container 7 Fixed rail 7a Front stopper 8 Movable rail 9 Front arm 10 Rear arm 9a, 10a Action point 9b, 10b Shaft support 11 Shelf support
13 Pulley 14 Holding frame 15 Cam body
15a Arc-shaped part 16 Spring member 17 Damper
17a Step 18 Rubber bush 19 Stopper
20 Damper cover 21 Shelf fixture 22 Food

Claims (6)

  A fixed rail fixed to the side wall of the shelf space provided in the upper part of the storage room, a movable rail that slides horizontally in the fixed rail, an arm pivotally supported on the movable rail, and one end as a movable rail It is composed of a spring member that holds the other end in conjunction with the rotation of the arm and urges the arm to rotate upward, and a shelf container that is held between the rotation tips of the arms on both sides. The shelf container is moved back and forth, the shelf container is moved up and down while maintaining the horizontal state by the rotation of the arm, and the spring member is pulled against the spring force by the rotation of the arm toward the lower front and the spring A shelf device characterized in that the downward rotation of the arm is stopped by pressing and locking a shock absorbing damper provided substantially on the same straight line as the member.   2. A shelf according to claim 1, wherein a cam body interlocking with the rotation of the arm is pivotally supported on the movable rail, and the other end of the spring member is locked to the cam body to urge the arm to rotate. apparatus.   The locking portion at the other end of the spring member in the cam body is located behind the shaft support portion when the shelf container is at the uppermost position with respect to the shaft support portion of the cam body, and when the shelf container is in the vicinity of the lowermost portion. 3. A shelf apparatus according to claim 2, wherein the shelf device is located at an opposing position rotated at an angle of about 180 degrees forward from the rear position.   3. A shelf apparatus according to claim 1, wherein the damper is pushed forward by rotation of the cam body and stopped at a predetermined position.   Form a cylindrical holder in the longitudinal direction on the movable rail, hold the rod-shaped damper slidably in this holder, move it by rotating the cam body, and stop it by moving a predetermined amount forward The shelf apparatus according to claim 4, wherein A refrigerator comprising the shelf device according to any one of claims 1 to 5 arranged in a shelf space at an uppermost stage of a storage room.

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