JP2604293B2 - Cold storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage for cooling and storing articles stored in a storage room.

[0002]

2. Description of the Related Art Conventionally, in this kind of low-temperature storage, since an internal storage room is cooled to a negative pressure and the pressure of internal air becomes lower than the pressure of external air, when opening and closing the heat insulating door, The door may be difficult to open.

[0003] Accordingly, Japanese Patent Application No. Hei.
In JP-A-134566, a pressure adjusting port is provided in an insulating door that opens and closes an opening of an insulating box, a rotatable shaft member is provided in both the insulating box and the insulating door, and the shaft member is rotatable with a pressure adjusting plate. By attaching the handle and opening and closing the pressure adjustment port by the pressure adjustment plate by rotating the shaft member when opening and closing the heat insulation door with the operation of the handle, the pressure adjustment port is always closed, and the heat insulation door is closed. At the time of opening, the pressure regulating port is opened to eliminate the pressure difference between the inside and outside of the storage chamber, thereby facilitating the opening operation of the heat insulating door.

[0004]

FIGS. 9 and 10 show the conventional structure in detail. The heat-insulating door 100 is provided with a pressure adjusting port 101 communicating between the inside and the outside.
And a shaft member 102 rotatably with respect to an insulated box (not shown).
Is provided. A handle mounting plate 103 is welded to the shaft member 102 as shown in FIG.
A handle 105 is rotatably attached to 3 by a bolt 104. As shown in FIG. 10, a plate-shaped pressure adjusting lid 1 is provided on a portion of the shaft member 102 located above the handle mounting plate 103.
Reference numeral 06 is welded and corresponds to the pressure adjusting port 101.

[0005] The handle 105 holds the heat-insulating door 100 in a closed state by engaging with a safety member 107 provided on the heat-insulating door 100. It protrudes outward from the outer dimensions of the low-temperature refrigerator, and if other low-temperature refrigerators or the like come into contact in such a state,
Since the handle mounting plate 103 is a single piece, it easily bends as shown by the arrow in FIG. If the handle mounting plate 103 is bent, the handle 105 cannot be engaged with the safety member 107, and the heat insulating door 100 cannot be kept closed.

Similarly, when the heat insulating door 100 is in a half-open state, the pressure adjusting lid 106 also protrudes outward, so that such deformation also occurs in the pressure adjusting lid 106, and the pressure adjusting lid 106 is bent as shown in FIG. Thus, there is a problem that even if the heat insulating door 100 is closed, the pressure adjusting port 101 cannot be closed, and cold air leaks.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problems. By increasing the impact resistance of the handle, it is possible to reliably maintain the closing of the heat insulating door and open and close the pressure regulating port. It is intended to provide a low-temperature storage that can be used.

[0008]

A low-temperature storage 1 according to the present invention has a heat-insulating door 5 whose opening 3 can be opened and closed freely, a heat-insulating box 4 having a storage room 6, and a door opening and closing operation for opening and closing the heat-insulating door 5. It has a device 30 and a pressure regulating port 31 provided in the heat insulating door 5 and communicating the outside with the storage room 6. The door opening / closing device 30 is rotatable with respect to the heat insulating door 5 and the heat insulating box 4. And a handle mounting plate 3 provided on the shaft member 34.
8 and the reinforcing plate 32, rotatably mounted on the handle mounting plate 38 and the reinforcing plate 32, is composed of 35. handle for maintaining the opening and closing the closed state of the insulating door 5, the reinforcing plate 3
2 is closer to the heat insulating door than the handle mounting plate 38
The pressure regulating port 3 is provided in parallel to the opposite side, and a part of the reinforcing plate 32 is provided.
1 is opened and closed.

[0009]

According to the present invention, the handle 35 is rotatably attached to both the handle mounting plate 38 and the reinforcing plate 32, and the impact strength is improved. Also, with the opening and closing of the heat insulating door 5,
The reinforcing plate 32 also rotates in conjunction with the rotation of the handle 35 to reinforce it.
The pressure adjusting port 31 is opened and closed by the plate 32 .

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a cross-sectional plan view of the heat insulating door 5 at the pressure adjusting port 31 with the handle 35 removed from the first safety member 40A, FIG. 2 is a perspective view of the low-temperature storage 1, FIG. FIG. 5 is an exploded perspective view of the door opening / closing device 30, FIG.
7 is a perspective view of the reinforcing plate 32, and FIG. 7 is a first groove 5A of the heat insulating door 5.
FIG. 7 is a perspective view of a portion, and FIG. 7 is a plan cross-sectional view of the heat insulating door 5 at the pressure adjustment port 31 with the handle 35 engaged with the first safety member 40A.

The low-temperature storage 1 is a so-called cold-roll box that is loaded on a transportation means such as a truck and transported to a destination, and is configured to cool stored articles during transportation. A description will be given taking a low-temperature refrigerator as an example.

The low-temperature refrigerator 1 has a heat-insulating box 4 having a moving wheel 2 at the bottom thereof, an opening 3 formed at the front surface, and a ceiling wall 4A whose whole surface is inclined backward and downward. A storage room 6 formed by an insulated door 5 that can be opened and closed freely, a cooling device 7 that cools the storage room 6, a blower 8 and a cold storage member 9, and a mechanical space formed below the heat insulating box 4. M, the top wall 4A, and the top wall 4A.
And a space K having a generally triangular longitudinal section for accommodating the wire fin condenser 13 and the blower 14 for the condenser. An air inlet 15 is formed at the rear of the top plate 12, and an air outlet 16 is formed at the front.

The storage room 6 is divided into two upper and lower rooms by a partition plate 20, the upper room being an article storage room 21, and the lower room being a freezing room 22.
And It is desirable that the partition plate 20 be detachably mounted or one end thereof is rotatably arranged. In the freezing chamber 22,
A pipe-on-sheet type evaporator 7 as a cooling device, a blower 8 and a cool storage agent 9 as a cool storage member are housed and arranged. In this example, a DC blower driven by a DC power supply is used as the blower 8. ing.

Numeral 24 denotes a duct arranged along the back wall 4E of the heat-insulating box 4, one end of which is opened to the upper part of the article storage chamber 21 to form an outlet 23, and the other end of which is the evaporator 7. The duct is opened to the windward side, and the article storage room 21 and the freezing room 22 communicate with each other by the duct 24 at the rear part. In addition, the article storage room 21 and the freezing room 22 communicate with each other at a front portion thereof through an inlet 25 formed at a front portion of the partition plate 20.
Then, the cool air that has passed through the cold storage agent 9 in the freezing chamber 22 is guided through the duct 24 from the outlet 23 into the upper part of the article storage chamber 21, and a cool air circulation path Q that returns from the suction port 25 to the freezing chamber 22 is formed. .

Reference numeral 30 denotes a door opening / closing device which is provided rotatably with respect to the heat-insulating door 5 and the heat-insulating box 4, and operates to open and close the heat-insulating door 5; The pressure regulating port is provided and communicates the outside with the storage room 6.

The door opening / closing device 30 is housed in a second groove 5B formed in the heat insulating door 5 over the entire length in the vertical direction.
A shaft member 34 rotatably fixed to the shaft member, a handle mounting plate 38 welded to the shaft member 34, and a flat portion facing the handle mounting plate 38 at a predetermined interval so as to face each other. A reinforcing plate 32 made of a thick steel plate fixed and welded.
The bolt 46 is attached to the handle mounting plate 38 and the reinforcing plate 32.
And a handle 35 rotatably attached by a nut 47
Consisting of

The shaft member 34 is rotatably held at both ends thereof with respect to the heat-insulating box 4, and is turned by a turning operation of a handle 35 and a vertical lever portion 36 acting as a lever when opening and closing the heat-insulating door 5. And a moving shaft 37. The handle mounting plate 38 and the reinforcing plate 32 are fixed to the shaft 37 by welding. The shaft portion 37 is fixed to the fixing member 39A while being housed in the second groove 5B.
And 39B to be rotatably held in the second groove 5B. 5C is a door gasket.

The tip of the handle 35 branches into two branches, and the heat insulating door 5
An inner side 35A and an outer side 35B are formed, and each side has a hole 3 through which a mounting bolt 46 is inserted.
5C is drilled. On the other hand, the handle mounting plate 38 is also provided with a hole 38A through which the bolt 46 is inserted.
As shown in FIG. 6, the reinforcing plate 32 has a female screw hole 32A into which the bolt 46 is screwed. The handle 35
5, the inner side 35A as shown by the arrow in FIG.
And the reinforcing plate 32, and the hole 35C is inserted into the handle mounting plate 3 so that the handle mounting plate 38 is sandwiched between the inner and outer sides 35A and 35B.
8 and the screw holes 32A of the reinforcing plate 32, and bolts 46 are inserted from the handle mounting plate 38 side into the holes 38A, 35A.
Then, the nut 47 is screwed into the screw hole 32A, and the nut 47 is screwed and tightened in a state where the nut penetrates and the end faces the heat insulating door 5 side. The handle 35 is rotatable with respect to the bolt 46 so that the handle 35 can be attached to the handle mounting plate 38 and the reinforcing plate 3.
2 are rotatably mounted on both sides.

Reference numeral 40 denotes a safety device for inhibiting the turning operation of the door opening / closing device 30 when the opening 3 is closed by the heat insulating door 5, and as shown in FIG. It comprises a first safety member 40A for restricting the movement, and a second safety member 40B for preventing the handle 35 held by the first safety member 40A from turning in the vertical direction. Handle 35 is first
While the heat-insulating door 5 is kept closed while being engaged with and held by the safety member 40A, the door opening / closing device (actually) is secured by fixing a key device such as a padlock key to holes formed in the safety members 40A and 40B. , The turning operation of the handle 35) is prohibited. As a result, the handle 35 held by the safety device 40 is
Of the first safety member 40A due to vibration or the like during transportation of the vehicle.

On the other hand, the reinforcing plate 32 has a size larger than the handle mounting plate 38, and the upper part thereof is located in front of the pressure adjusting port 31 and rotates together with the turning operation of the handle 35. As shown in FIG. 8, the pressure adjusting port 31 of the heat insulating door 5 is closed with the handle 35 engaged with the first safety member 40A. This prevents cold air from leaking while the heat insulating door 5 is closed, and eliminates the need for a special pressure regulating port opening / closing lid.

When the heat-insulating door 5 is opened, the handle 35 is moved to the first position.
When it is removed from the safety member 40A and rotated forward as shown in FIG. 1, the reinforcing plate 32 also rotates in conjunction with it and opens the pressure adjustment port 31, so that there is no air pressure difference between the inside and outside of the storage chamber 6, and the heat insulating door 5 Can be easily opened.

Further, since the handle 35 is attached to both the handle mounting plate 38 and the reinforcing plate 34 by the bolts 46 and the nuts 47 as described above, the impact resistance of the handle 35 is significantly improved, as shown in FIG. Even if another low-temperature box or the like collides with the handle 35 protruding from the heat-insulating door 5, the handle 35
Is received by both the handle attachment plate 38 and the reinforcing plate 32, and the handle attachment plate 38 is unlikely to be deformed as in the related art. Therefore, it is possible to reliably maintain the insulation door 5 closed by the handle 35 as shown in FIG. Also, when an impact is applied to the reinforcing plate 34, the strength of the reinforcing plate 34 itself is increased, and the impact is also received by the handle 35 and the handle mounting plate 38. Deformation is unlikely to occur, whereby cold air leakage from the pressure adjustment port 31 can be prevented.

Further, since the bolt 46 is screwed to the reinforcing plate 32, the handle 35 is firmly attached to the shaft member 34 by the double nut effect together with the nut 47, and the nut 4
As a result, the handle 35 can be securely prevented from falling off due to the looseness of the handle 7.

In the embodiment, the screw holes are formed on the reinforcing plate 32 side. However, when the bolt 46 is inserted from the heat insulating door 5 side and the nut 47 comes to the handle mounting plate 38 side, the handle mounting plate 38 is used.
A screw hole is formed in the hole.

[0025]

According to the present invention, the handles are opposed and parallel to each other.
Is rotatably mounted on both the handle mounting plate and the reinforcing plate provided in the case, so that if a shock is applied to the handle,
Also, the impact is dispersed to both the handle mounting plate and the reinforcing plate, so that the impact resistance is improved, and the deformation of the handle mounting plate due to collision with another low-temperature storage or the like is less likely to occur. Therefore, the thermal insulation door is reliably maintained closed by the handle. Also, handle mounting plate
The reinforcement plate provided in parallel with the handle mounting plate on the heat insulation door side of
The pressure adjustment port is linked to the rotation of the handle when opening and closing the heat-insulating door.
It can be opened and closed.
It can be used for both opening and closing means of the mouth.
As a result, there is no need to provide a special pressure opening / closing lid,
It is necessary to prevent the number of parts from increasing due to the provision of reinforcing plates.
Can be. Furthermore, the deformation of the reinforcing plate itself is not likely to occur.
As a result, the pressure adjustment port can be securely closed by the reinforcing plate.
Yellow, cold air leakage from the control pressure port also will be able to reliably prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of a heat-insulating door in a pressure adjusting port portion in a state where a handle is removed from a first safety member.

FIG. 2 is a perspective view of a low-temperature storage.

FIG. 3 is a vertical sectional view of a low-temperature storage.

FIG. 4 is a front sectional plan view of a low-temperature storage;

FIG. 5 is an exploded perspective view of the door opening / closing device.

FIG. 6 is a perspective view of a reinforcing plate.

FIG. 7 is a perspective view of a first groove portion of the heat insulating door.

FIG. 8 is a cross-sectional plan view of the heat-insulating door at the pressure adjusting port in a state where the handle is engaged with the first safety member.

FIG. 9 is a plan sectional view showing the structure of a conventional low-temperature storage.

FIG. 10 is another plan sectional view showing the structure of a conventional low-temperature storage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature storage 4 Insulated box 5 Insulated door 6 Storage room 30 Door opening / closing device 31 Pressure regulator 32 Reinforcement plate 34 Shaft member 35 Handle 38 Handle mounting plate 40A First safety member 46 Bolt 47 Nut

Claims (1)

(57) [Claims] 1. An insulating box body having a storage room whose opening is opened and closed by an insulating door, a door opening and closing device for opening and closing the insulating door, and an exterior and the storage room provided on the insulating door. In the low-temperature storage provided with a pressure adjusting port for communicating with a shaft member, the door opening and closing device includes a shaft member rotatably provided with respect to the heat-insulating door and the heat-insulating box, and a handle mounting plate provided on the shaft member. and a reinforcing plate, pivotally mounted on the handle mounting plate and the reinforcing plate consists of a handle to maintain the closed state of the opening and closing operation and the heat insulation door of the insulating door, before
The reinforcing plate has a handle mounting plate on the heat insulating door side from the handle mounting plate.
A low-temperature refrigerator characterized in that the pressure regulating ports are provided in parallel with each other so as to open and close a part of the reinforcing plate.