JP4148928B2 - Low temperature storage - Google Patents

Description

  The present invention relates to a low temperature storage for storing articles at a low temperature in a storage chamber.

Conventionally, this type of low-temperature storage, for example, a low-temperature storage for logistics, has a storage chamber configured in a heat insulating box, and the storage chamber is closed with a heat insulating door so that it can be opened and closed. Cooled with an agent or the like, the stored articles are stored in a cooled state. In this case, the heat insulation door is provided with a handle (handle) for opening and closing, and the heat insulation door is opened and closed by operating this handle, and the handle is held on the outer surface of the heat insulation door to keep the heat insulation door closed. A handle holding member (safety member) is attached, and a handle is engaged with the handle holding member to hold the closed state of the heat insulating door (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-141848

  By the way, in this kind of low-temperature storage, when the size of the heat insulation box becomes large, an operator (or a user) enters and exits the storage chamber from the opening and delivers articles. In such a case, if the heat insulation door closes in a state where an operator enters the storage room, there is a problem that leads to an accident such as suffocation.

  Conventionally, particularly in prefabricated refrigerators, etc., the handle attached to the heat insulation door is engaged with the heat insulation box side to maintain the closed state. Therefore, in order to prevent such confinement, the handle attachment is loosened from the storage room side. In this case, the engagement with the heat insulation box can be released, but the handle cannot be completely removed. Therefore, the shape of the handle that can be used is limited, and complicated and expensive parts must be used. Therefore, there has been a problem that it is difficult to use the low-temperature storage for logistics as described above.

  The present invention has been made to solve the above-described conventional technical problems, and an object thereof is to realize an inconvenience that an operator can be confined in a storage chamber in a low-temperature storage at a low cost with a simple configuration.

The low-temperature warehouse of the present invention is configured such that the opening of the storage chamber configured in the heat insulation box is closed by a heat insulation door so as to be freely opened and closed, and is attached to the heat insulation door with a handle for opening and closing the heat insulation door. A handle holding member for holding the handle and maintaining the closed state of the heat insulating door, and attaching the handle holding member to the heat insulating door with a fitting that can be attached and detached from the storage chamber side. Is characterized in that an interior lamp is provided that lights up for a predetermined period after the heat insulation door is closed, and illuminates the storage room with the fixture portion at the center .

  The cryogenic chamber of the invention of claim 2 is that the handle holding member enters the heat insulating door in the above and has a nut portion in which a thread groove is formed on the inner surface, and the fixture has a thread formed on the outer surface of the tip, The handle holding member is attached to the heat insulation door by inserting the fixture into the heat insulation door from the storage chamber side and screwing the screw thread into the screw groove in a detachable manner.

  According to a third aspect of the present invention, there is provided a low-temperature chamber according to the above-described aspect, wherein the heat insulating door is provided with a rotation preventing portion for preventing the handle holding member from rotating.

  According to a fourth aspect of the present invention, there is provided a cryogenic chamber according to the second or third aspect, wherein the heat insulating door is provided with a heat insulating material between the outer surface material and the inner surface material, and a through hole into which the nut portion and the fitting are inserted is formed. In addition, a spacer is provided between the inner surfaces of the double-sided material located around the through hole.

  In the present invention, in a low-temperature warehouse in which the opening of the storage chamber configured in the heat insulation box is closed openably with a heat insulation door, a handle for opening and closing the heat insulation door, and a handle attached to the heat insulation door. A handle holding member for holding and maintaining the closed state of the heat insulating door, and this handle holding member is attached to the heat insulating door with a fitting that can be attached and detached from the storage chamber side. When it is confined, it is possible to remove the handle holding member from the heat insulating door by operating the fixture from the storage chamber side.

When the handle holding member is removed from the heat insulating door, the closed state of the heat insulating door is also released, so that a worker who is confined can easily escape by opening the heat insulating door. In particular, since the handle holding member is structured to be removed from the heat insulating door, it can be configured regardless of the shape of the handle, and the structure can be simplified, thereby reducing the product cost . In addition, since the interior lamp that illuminates the storage room centering on the fixture part is provided in the storage room after the heat insulation door is closed, the workers etc. Can be easily confirmed.

  Further, as in the invention of claim 2, the handle holding member enters the heat insulating door and has a nut portion in which a thread groove is formed on the inner surface, and the fixture has a thread formed on the outer surface of the tip. By inserting the screw into the heat insulation door from the storage room side and screwing the screw thread detachably into the thread groove, the handle holding member can be attached to the heat insulation door. The screwing with the handle holding member can be easily released and removed from the heat insulating door. In addition, by configuring the handle holding member with a nut, it is possible to increase the screwing allowance with the fixture without overhanging the handle holding member from the heat insulating door. The state can be made strong.

  Furthermore, if the rotation prevention portion for preventing the rotation of the handle holding member is provided in the heat insulating door as in the invention of claim 3, the inconvenience that the handle holding member rotates together when turning the fixture is avoided. The holding member can be easily removed.

  Furthermore, in the invention of claim 4, the heat insulating door is formed by providing a heat insulating material between the outer surface material and the inner surface material, and a through hole into which the nut portion and the fixture are inserted is formed. Since the spacer which is located and extends between the inner surfaces of the double-sided materials is provided, it is possible to prevent inconvenience that the face material of the heat insulating door is deformed even if the fastening force between the handle holding member and the fixture is increased.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a front view of a cryogenic chamber 1 of an embodiment to which the present invention is applied, FIG. 2 is a rear view of the cryogenic chamber 1, FIG. 3 is a longitudinal side view of the cryogenic chamber 1, and FIG. FIG. 5 is an exploded perspective view of the door opening / closing device 30 of the cryogenic chamber 1, FIG. 6 is a diagram of the handle 35 portion of the heat insulating door 5 of the cryogenic chamber 1 viewed from the storage chamber 6, and FIG. Is a vertical side view of the handle 35 portion of the heat insulating door 5 of the low temperature chamber 1, FIG. 8 is a plan sectional view of the heat insulating door 5 in a state where the handle 35 is engaged with the handle holding member 40, and FIG. The plane sectional view of the heat insulation door 5 of the state removed from the member 40 is shown, respectively.

  The cryogenic chamber 1 according to the embodiment is a low temperature warehouse for logistics that is loaded on a transportation means such as a truck and transported to a destination, and is configured so that stored articles can be cooled during transportation.

  The cryogenic chamber 1 is provided with a moving wheel 2 at the bottom, an insulating box 4 having a ceiling wall 4A that is formed with an opening 3 on the front surface and is inclined backward and downward, and the opening 3 can be opened and closed. In the storage room 6 formed by the heat-insulating door 5 to be closed, the cooling device 7 for cooling the storage chamber 6, the blower 8 and the cold storage member 9, and the machine room space M formed below the heat-insulating box 4 The compressor 11 is disposed, and the top wall 4A and a horizontal top plate 12 covering the top wall 4A are formed. The wire fin type condenser 13 and the condenser blower 14 are housed in a substantially triangular shape. Space K. An air intake 15 is formed at the rear of the top plate 12, and an air outlet 16 is formed at the front. The storage chamber 6 has a size that allows an operator to enter and exit the interior and deliver articles.

  The storage chamber 6 is divided into two upper and lower chambers by a partition plate 20, and the upper chamber is an article storage chamber 21 and the lower chamber is a freezing chamber 22. In addition, it is desirable that the partition plate 20 be detachable or disposed so that one end thereof is freely rotatable. The freezing chamber 22 houses and arranges a pipe-on-sheet evaporator 7 as a cooling device, a blower 8 and a cool storage agent 9 as a cool storage member, and a battery (DC) (not shown) mounted in this example as the blower 8. A DC blower driven by a power source is used.

  A duct 24 is arranged along the back wall 4E of the heat insulating box 4 and has one end opened to the upper part of the article storage chamber 21 to form the blowout port 23 and the other end to the windward side of the evaporator 7. The article storage chamber 21 and the freezing chamber 22 are communicated with each other by the duct 24 at the rear portion. The article storage chamber 21 and the freezing chamber 22 communicate with each other at the suction port 25 formed in the front portion of the partition plate 20. And the cold air which passed the cool storage agent 9 of the freezing chamber 22 is led to the upper part in the goods storage chamber 21 through the duct 24 from the blower outlet 23, and the cold air circulation path Q which returns to the freezing chamber 22 from the suction inlet 25 is formed. .

  Each of the heat insulating doors 5 is formed by filling a heat insulating material 45 such as polyurethane foam between a metal outer surface material 43 and an inner surface material 44, and a heat insulating box which can be rotated by a hinge 41. It is pivotally supported by the body 4. 30 is provided so as to be rotatable with respect to the heat insulating door 5 and the heat insulating box 4, and is a door opening and closing device for opening and closing the heat insulating door 5, and 31 is formed at the substantially central portion on the left side of the heat insulating door 5. The pressure regulating port is provided in the recessed portion 5 </ b> A and communicates between the outside and the inside of the storage chamber 6.

  The door opening / closing device 30 includes a shaft member 34 that is rotatably provided in the longitudinal direction inside the left side of the heat insulating door 5, a handle mounting plate 38 welded to the shaft member 34, and the handle mounting. Reinforcing plate 32 made of a thick steel plate, which is arranged in parallel with the plate 38 facing each other with a predetermined distance, and is welded and fixed. Bolt 46 and nut are attached to handle mounting plate 38 and reinforcing plate 32. And a handle 35 which is rotatably attached at 47.

  The shaft member 34 is rotatably supported at both ends with respect to the heat insulating box 4, and is a shaft that rotates as a handle when the heat insulating door 5 is opened and closed, and a shaft that is rotated when the handle 35 is rotated. Part 37. The handle mounting plate 38 and the reinforcing plate 32 are fixed to the shaft portion 37 by welding. The shaft portion 37 is rotatably held in the heat insulating door 5.

  The front end of the handle 35 is bifurcated to form an inner side 35A and an outer side 35B on the heat insulating door 5 side, and holes 35C through which mounting bolts 46 are inserted are formed in each side. . On the other hand, the handle attachment plate 38 is also provided with a hole 38A through which the bolt 46 is inserted, and the reinforcing plate 32 is formed with a screw hole (not shown) of a female screw hole into which the bolt 46 is screwed. The handle 35 has an inner side 35A inserted between the handle mounting plate 38 and the reinforcing plate 32 as shown by an arrow in FIG. 5, and the hole 35C is mounted on the handle so that the handle mounting plate 38 is sandwiched between the inner and outer sides 35A and 35B. The holes 38A of the plate 38 and the screw holes of the reinforcing plate 32 are matched, and the bolts 46 are inserted into the holes 38A and 35C from the handle mounting plate 38 side, and further screwed into the screw holes, penetrating through the end portions. With the nut 47 facing the heat insulating door 5 side, the nut 47 is screwed and tightened. The handle 35 is rotatable with respect to the bolt 46, whereby the handle 35 is rotatably attached to both the handle attachment plate 38 and the reinforcing plate 32.

  Reference numeral 40 denotes a metal handle holding member that prohibits the rotation operation of the door opening / closing device 30 in a state in which the opening 3 is closed by the heat insulating door 5, and the handle 35 is engaged as shown in FIG. The first holding part 40A having a shape that opens upward and to the left and right to restrict the movement of the second holding part, and the second holding part that is positioned above the first holding part 40A and prevents the handle 35 held by the first holding part 40A from rotating in the vertical direction. Part 40B. While the handle 35 is engaged and held by the first holding portion 40A, the heat insulating door 5 is maintained in a closed state, but by fixing a key device such as a padlock key in the holes formed in the holding portions 40A and 40B. The rotation operation of the door opening / closing device (actually the handle 35) is prohibited. As a result, the handle 35 held by the handle holding member 40 is prevented from being accidentally detached from the first holding portion 40A due to vibration or the like during transportation of the low temperature storage 1.

  On the other hand, the reinforcing plate 32 has a size larger than the handle mounting plate 38, and the upper portion thereof is positioned in front of the pressure adjusting port 31, and rotates together with the rotation operation of the handle 35, as shown in FIG. As described above, the pressure regulating port 31 of the heat insulating door 5 is closed with the handle 35 engaged with the first holding portion 40A. This prevents cold air leakage while the heat insulating door 5 is closed, and eliminates the need for a special pressure adjustment opening / closing lid.

  Further, when the handle 35 is detached from the first holding portion 40A and rotated forward as shown in FIG. 9 when the heat insulating door 5 is opened, the reinforcing plate 32 is also rotated in conjunction with the pressure opening 31 to open. The air pressure difference between the inside and outside of the chamber 6 is eliminated, and the heat insulating door 5 can be easily opened.

  Furthermore, since the handle 35 is attached to both the handle attachment plate 38 and the reinforcing plate 34 by the bolt 46 and the nut 47 as described above, the impact resistance strength of the handle 35 is remarkably improved. As shown in FIG. Even if another cold storage or the like collides in a state of protruding from the heat insulating door 5, the impact applied to the handle 35 is received by both the handle mounting plate 38 and the reinforcing plate 32. It becomes difficult to deform. Therefore, the heat insulation door 5 can be reliably kept closed by the handle 35 as shown in FIG. In addition, even when an impact is applied to the reinforcing plate 34, the strength of the reinforcing plate 34 itself is high, and the impact is also received by the handle 35 and the handle mounting plate 38 contrary to the above. It is difficult for deformation to occur, thereby preventing cold air leakage from the pressure adjusting port 31.

  Further, since the bolt 46 is screwed into the reinforcing plate 32, the handle 35 can be firmly attached to the shaft member 34 by the double nut effect together with the nut 47, and the handle 35 can be securely dropped due to the looseness of the nut 47. Can be prevented.

  On the other hand, the handle holding member 40 is attached to the heat insulating door 5 by a metal emergency escape handle 42 as a fixture as shown in FIG. In this case, a through hole 48 that penetrates the outer surface material 43, the heat insulating material 45, and the inner surface material 44 is formed in the recess 5A, and a cylindrical hard resin spacer 49 is disposed around the through hole 48. The spacer 49 extends between the outer surface material 43 and the inner surface of the inner surface material 44. That is, the through hole 48 is formed in the spacer 49.

  In addition, a through hole 50 is formed in the first holding portion 40A of the handle holding member 40, and a nut is provided corresponding to the back side of the through hole 50, and is welded and fixed to the rear surface side peripheral portion of the through hole 50. The nut portion 51 is used. A predetermined thread groove is formed in the nut portion 51. On the other hand, the emergency escape handle 42 is composed of a head 42A coated with, for example, a hard resin having a dimension that can be gripped by fingers and easily rotated, and a bolt part 42B protruding from the head 42A. A thread is formed at the tip.

  When attaching the handle holding member 40 to the heat insulating door 5, the net portion 51 is inserted into the through hole 48 from the front surface of the heat insulating door 5, and the tip of the bolt portion 42B of the emergency escape handle 42 is inserted from the storage chamber 6 side. Insert into the through hole 48. At that time, a flat washer 52 and a spring washer 53 are interposed between the emergency escape handle 42 and the heat insulating door 5. Then, the head portion 42A is rotated clockwise, the thread of the bolt portion 42B is detachably screwed into the thread groove of the nut portion 51, fastened to the handle holding member 40, and fixed to the heat insulating door 5 (FIG. 7). State).

  At this time, the handle holding member 40 is configured with a nut portion 51 that enters the heat insulating door 5 from the through hole 48, so that the handle holding member 40 does not protrude forward from the heat insulating door 5 and is used for emergency escape. The screwing allowance with the handle 42 can be increased. Thereby, sufficient fastening force is ensured and the attachment state of the handle holding member 40 can be strengthened. Further, since a spacer 49 is provided around the through-hole 48 and extends between the inner surfaces of the double-sided materials 43 and 44, the double-sided material 43 is provided even if the emergency escape handle 42 and the handle holding member 40 are tightened strongly. , 44 is prevented from inwardly deforming.

  On the right side of the handle holding member 40 attached in this manner, an anti-rotation metal fitting 56 as a rotation prevention unit is attached to the front surface of the heat insulating door 5. The anti-rotation metal fitting 56 abuts over a predetermined range in the vertical direction on the right side surface of the handle holding member 40. Further, the heat insulating box 4 corresponding to the right side of the emergency escape handle 42 when viewed from the storage chamber 6 side is provided with an interior lamp 54 located in the storage chamber 6. The interior lamp 54 is supplied with power from the battery and is turned on for a predetermined period (for example, several minutes to 10 minutes) after the heat insulating door 5 is closed, and illuminates the interior of the storage room 6 centering on the emergency escape handle 42.

  With the above configuration, in the unlikely event that an operator is confined in the storage chamber 6, that is, in a state where the operator is in the storage chamber 6, the heat insulating door 5 is closed, and the handle 35 as shown in FIG. When the first holding portion 40A of the holding member 40 has been engaged, the operator may rotate the head portion 42A of the emergency escape handle 42 counterclockwise. At this time, immediately after the heat insulation door 5 is closed, the interior lamp 54 is turned on to illuminate the emergency escape handle 42, so that the operator can easily confirm the position of the emergency escape handle 42.

  By rotating the emergency escape handle 42 counterclockwise, the screw engagement between the nut portion 51 and the bolt portion 42B is loosened, and eventually the handle holding member 40 is detached from the heat insulating door 5. As a result, the holding of the handle 35 is released and the handle 35 can be rotated as shown in FIG. 9, so that the heat insulating door 5 can be opened and the operator can escape. In this case, since the anti-rotation metal fitting 56 that prevents the rotation of the handle holding member 40 is attached to the heat insulating door 5, the handle holding member 40 rotates together when turning the emergency escape handle 42 (clockwise as viewed from the front). The handle holding member 40 can be easily removed.

  As described above, the handle holding member 40 for holding the handle 35 and maintaining the closed state of the heat insulation door 5 is attached to the heat insulation door 5 by the emergency escape handle 42 that can be attached and detached from the storage chamber 6 side. In the unlikely event that an operator is confined in the storage chamber 6, the handle holding member 40 can be removed from the heat insulating door 5 by releasing the emergency escape handle 42 from the storage chamber 6 side. .

  And if this handle holding member 40 is removed from the heat insulation door 5, the handle 35 will not be held, and the closed state of the heat insulation door 5 is also released, so that the confined operator can easily escape by opening the heat insulation door 5. It becomes possible to do. In particular, since the handle holding member 40 is removed from the heat insulating door 5, the handle 35 can be formed regardless of the shape of the handle 35, and the structure can be simplified, so that the product cost can be reduced.

  The handle holding member 40 enters the heat insulating door 5 and has a nut portion 51 in which a thread groove is formed on the inner surface, and the emergency escape handle 42 has a screw thread formed on the outer surface of the tip. Since the handle 42 is inserted into the heat insulating door 5 from the storage chamber 6 side and the screw thread is detachably screwed into the thread groove, the handle holding member 40 is attached to the heat insulating door 5. By rotating the emergency escape handle 42 from the side, the screwing with the handle holding member 40 can be easily released and removed from the heat insulating door 5.

  In the embodiment, the present invention is applied to a low-temperature warehouse for distribution having wheels, but the present invention is not limited to this, and the present invention is also effective for a stationary ordinary low-temperature warehouse.

It is a front view of the low temperature store of the example to which the present invention is applied. It is a rear view of the low temperature store | warehouse | chamber of FIG. It is a vertical side view of the low-temperature warehouse of FIG. It is a perspective view of the handle | steering-wheel part of the door opening / closing apparatus of the low-temperature warehouse of FIG. It is a disassembled perspective view of the door opening / closing apparatus of the low-temperature warehouse of FIG. It is the figure which looked at the handle | steering-wheel part of the heat insulation door of the low-temperature warehouse of FIG. 1 from the storage room side. It is a vertical side view of the handle | steering-wheel part of the heat insulation door of the low-temperature warehouse of FIG. It is a plane sectional view of the heat insulation door of the low-temperature store | warehouse | chamber of FIG. 1 of the state which made the handle engage with the handle holding member. It is a plane sectional view of the heat insulation door of the low-temperature warehouse of Drawing 1 in the state where a handle was removed from a handle holding member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Low-temperature warehouse 4 Heat insulation box 5 Heat insulation door 6 Storage room 30 Door opening / closing device 35 Handle 40 Handle holding member 42 Emergency escape handle (attachment tool)
48 Through-hole 49 Spacer 51 Nut 56 Anti-rotation bracket (Rotation prevention)

Claims (4)

In a low-temperature warehouse that is configured to open and close the opening of the storage chamber configured in the heat insulation box with a heat insulation door,
A handle for opening and closing the heat insulating door;
A handle holding member attached to the heat insulating door, for holding the handle and maintaining the closed state of the heat insulating door;
The handle holding member is attached to the heat insulating door with a fitting that can be attached and detached from the storage chamber side , and the storage chamber is turned on for a predetermined period after the heat insulating door is closed, and the fitting portion is centered. A low-temperature storage provided with an interior lamp for illuminating the storage room . The handle holding member enters the heat insulating door and has a nut portion in which a thread groove is formed on the inner surface, and the fixture has a thread formed on the outer surface of the tip.
The handle holding member is attached to the heat insulation door by inserting the fixture into the heat insulation door from the storage chamber side and removably screwing the screw thread into the screw groove. The low temperature storage according to claim 1.   The low-temperature warehouse according to claim 2, wherein a rotation blocking portion for blocking rotation of the handle holding member is provided in the heat insulating door.   The heat insulating door is formed by providing a heat insulating material between an outer surface material and an inner surface material, and a through-hole into which the nut portion and the fixture are inserted is formed around the through-hole. The low temperature storage according to claim 2 or 3, wherein a spacer is provided between the inner surfaces.

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