JP3338152B2 - 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 storage such as a commercial refrigerator or a refrigerator, and more particularly to a so-called cart-in type storage for storing articles loaded on a cart called a cart. .

[0002]

2. Description of the Related Art Conventionally, this kind of cart-in type storage is constituted by an insulated box having an opening at the front as shown in Japanese Patent Application No. 4-3155 filed by the applicant. The door is opened, and a cart loaded with articles such as food is rolled and pushed through the opening. In this case, the bottom wall of the heat insulating box on which the cart rides is provided with various reinforcements as described below in order to support the weight of the cart and the articles.

[0003] Fig. 9 is a longitudinal side view of a conventional heat insulating box 101 of this kind of storage, and Fig. 10 is a bottom plate 10 of an outer box 102.
2A is a plan view, FIG. 11 is a side view of the bottom plate 102A, and FIG.
Shows longitudinal side views of the front part of the bottom wall 101A of the heat insulating box 101, respectively. The heat insulating box 101 is made of, for example, an outer box 102 made of stainless steel having an opening at the front, an inner box 103 made of stainless steel also having an opening at the front, and a heat insulating material such as foamed polyurethane filled between the outer box 102 and the inner box 103. A storage room 105 is formed in the inner box 103. Reference numeral 106 denotes a hard resin breaker attached to the opening edge of the heat insulating box 101.
Reference numerals 07 and 108 denote through holes for communicating with a cooling unit (not shown) arranged on the top surface of the heat insulating box 101.

[0004] At the front end of the bottom wall 101A of the heat insulating box 101,
A slope (not shown) for taking the cart in and out is attached. However, since the slope angle of the slope cannot be made too steep, the bottom plate 1 of the outer box 102 is generally conventionally used.
02A and the bottom wall 101 including the bottom plate 103A of the inner box 103
The thickness of A was about 20 mm. However, with such a thickness, the distance between the bottom plate 102A of the outer box 102 and the bottom plate 103A of the inner box 103 is only 10 mm or more, and it is extremely difficult to foam-fill the heat insulating material 104.

Therefore, the bottom wall 101 of the conventional heat insulating box 101 is
A had the structure shown in FIGS. That is,
On the upper surface of the bottom plate 102A of the outer box 102, the reinforcing angles 109, 11 at the peripheral and central parts assembled by welding with each other.
Numeral 0 is fixed by spot welding, and a heat-insulating member 111 such as a plywood subjected to a waterproof treatment is attached to the inside of the reinforcing angle 109 and between the reinforcing angles 109 and 110 by adhesion. In this case, the surrounding reinforcing angle 109 including the front part has a substantially U-shaped cross section open to the upper surface,
The heat insulating member 111 is attached inside.

[0006] The heat insulating member 111 has four grooves formed in the front and rear, and the thick steel plate 11 is formed in the grooves.
2 (parts indicated by diagonal lines in FIG. 10) are respectively bonded and fixed. The steel plate 112 protects and reinforces the bottom plate 103A of the inner box 103 with which the wheels of the cart are in contact, and the upper surface thereof is flush with the upper surface of the heat insulating member 111. Then, an adhesive or an adhesive tape is applied to the upper surfaces of the reinforcing angles 109 and 110 and the heat insulating member 111,
By bonding the bottom plate 103A of the inner box 103 from above, the bottom wall 101A of the heat insulating box 101 is formed. Then, the bottom wall 101 is attached to the side plates of the outer box 102 and the inner box 103.
A, the outer box 102 other than the bottom wall 101A, and the inner box 10
The heat insulating material 104 is foam-filled between the three to form a heat insulating box 101.
Was composed.

[0007]

As described above, the reinforcing structure of the bottom wall 101A of the conventional heat insulating box 101 is extremely complicated, and its weight is heavy, which is one of the factors which hinders improvement of the assembling workability. On the other hand, since the reinforcing angles 109 and 110 have a welded structure, dimensional errors are likely to occur, and since the reinforcing angles are fixed to the bottom plate 102A by spot welding,
Bonding of the heat insulating member 111 tends to be insufficient.

As a result, the rigidity of the bottom wall 101A cannot be sufficiently ensured. In particular, the rigidity at the opening (front portion) is insufficient and the bottom wall 101A is deformed when a storage is installed. The engagement of the pod latch (locking device) had to be adjusted on site.

Further, the heat insulation of the bottom wall 101A depends only on the heat insulating member 111 such as a plywood, and the heat insulating performance is insufficient, so that dew condensation is generated and the operation is inefficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problems. In particular, in a cart-in type storage, the rigidity and heat insulation performance of the bottom wall of the heat-insulating box body are improved, and assembly is performed. The purpose is to improve workability.

[0011]

The storage C according to the first aspect of the present invention comprises a heat insulating box 1 formed by filling a foam heat insulating material 4 between an outer box 2 and an inner box 3 opening to the front. And an inner box reinforcing angle 21 attached over the entire width of the opening on the lower surface of the front of the bottom plate 3A of the inner box 3, and a bottom plate 2A of the outer box 2
An outer box reinforcing angle 28 which is mounted across the opening full width at the front upper surface, and a heat insulating member 31 provided between these two angles 21 and 28, the inner box 3 bottom plate 3
A has a front end bent into a substantially U-shaped cross section, and the inner box 3 has a bottom plate 3A.
The heater 22 is arranged inside the front surface 3B of the
Soft to which the outer box reinforcing angle 28 abuts on the rear side of the motor 22
Insulation material 23 is arranged and outer box 2 behind angles 21 and 28
The space between the bottom plates 2A, 3A of the inner box 3 is filled with the foamed heat insulating material 4.

The storage C according to the second aspect of the present invention provides the bottom wall 1A of the heat-insulating box 1 including the outer box 2 and the inner box 3 in the above.
Has a thickness of 25 mm to 35 mm.

A storage C according to a third aspect of the present invention comprises a heat insulating box 1 formed by filling a foamed heat insulating material 4 between an outer box 2 and an inner box 3 opening to the front. 3 bottom plate 3A
An inner box reinforcing angle 21 which is attached over the entire width of the opening on the lower surface of the front and is opened downward and has a substantially U-shaped cross section, and is attached over the entire width of the opening on the front upper surface of the bottom plate 2A of the outer box 2 and is opened upward. And a heat insulating member 31 provided in the outer box reinforcing angle 28. The outer box reinforcing angle 28 is spaced apart from the inner box reinforcing angle 21. And the rear wall 21B and the front wall 21A of the inner box reinforcing angle 21.
On the inner surface, the rear wall 28B and the front wall 2 of the outer box reinforcing angle 28
8A, a heat insulating spacer 24 is interposed between the bottom plates 2 of the outer box 2 and the inner box 3 behind the reinforcing angle 21 of the inner box.
The space between A and 3A is filled with the foamed heat insulating material 4.

According to the storage C of the first aspect of the present invention, the front portion (opening portion) of the bottom wall 1A of the heat insulating box 1 is reinforced by the inner box reinforcing angle 21 and the outer box reinforcing angle 28 over the entire width, and the inside thereof is Is insulated by the heat insulating member 31, and the space between the outer box 2 bottom plate 2A and the inner box 3 bottom plate 3A behind the angle 21 is filled with the foamed heat insulating material 4, so that the rigidity of the entire bottom wall 1A of the heat insulating box 1 is Is significantly improved. Therefore, deformation at the time of installation is suppressed, and adjustment work such as the height of the door 11 and engagement of the latch at the site can be reduced.

In particular, the filling of the foamed heat insulating material 4 significantly improves the heat insulating performance of the bottom wall 1A of the heat insulating box 1 and also significantly simplifies the structure of the bottom wall 1A as compared with the conventional case. Thus, cost and weight can be reduced, and assembling workability and safety during assembly are improved.

Furthermore, the front end of the bottom plate 3A of the inner box 3 is substantially sectioned.
It is bent in a U-shape, and the heat is placed inside the front of the bottom plate 3A of the inner box 3.
The bottom 22 of the inner box 3 to the front of the bottom plate 3A.
Dew condensation can be prevented. An outer box supplement is provided on the rear side of the heater 22.
The soft heat insulating material 23 with which the strong angle 28 contacts is arranged.
Therefore, the bottom plate 3A of the inner box 3 and the outer box reinforcing angle 21
Thermally shuts off to suppress heat leak from heater 22, preventing condensation
The stopping effect can be improved.

Further , according to the second aspect of the present invention,
If the thickness of the bottom wall 1A is 25mm to 35mm,
Without disturbing the work of taking out and in
Foam filling can be performed smoothly. Soshi
The thickness of the bottom wall 1A is 25 mm to 35 m as described above.
By setting m, the arrangement of the heater 22 is also facilitated.

According to the third aspect of the present invention, the bottom of the heat insulating box 1 is provided.
The front part of the wall 1A (opening) is the inner box reinforcement angle over the entire width
21 and outer box reinforcing angle 28,
The part is insulated by the heat insulating member 31 and the angle 21
Foam breaks between the outer bottom box 2A and the bottom box 3A.
Since the heat material 4 is filled, the entire bottom wall 1A of the heat insulating box 1 is
The rigidity is significantly improved. Therefore, deformation during installation is suppressed.
Adjustment of the height of the door 11 and engagement of the latch at the site
Work can be reduced.

Also, by filling the foamed heat insulating material 4,
As a result, the heat insulating performance of the bottom wall 1A of the heat insulating box 1 is significantly improved.
At the same time, the structure of the bottom wall 1A is significantly simplified as compared with the conventional case.
Cost and weight.
As a result, assembly workability and safety during assembly are improved. Furthermore,
The outer box reinforcement angle 28 is spaced within the inner box reinforcement angle 21
From the inner box reinforcement angle 21
Direct heat conduction to the outer box reinforcing angle 28 can be prevented.
Therefore, the heat insulating performance of the bottom wall 1A of the heat insulating box 1 is further improved.
Will be able to

In particular, the rear wall 21B of the inner box reinforcing angle 21
And the rear wall of the outer box reinforcing angle 28 on the inner surface of the front wall 21A.
A heat insulating spacer 24 interposed between the front wall 28A and the front wall 28A;
(Soft insulation material) 23 are provided, respectively,
Further improvement is achieved, and the insulation spacer is reinforced by the outer box
It serves as a guide when assembling the angle 28 and plays a role in positioning
Therefore, the workability of assembling the heat insulating box 1 is further improved.
You.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a storage C of the present invention, and FIG.
Is a perspective view of the heat-insulating box 1 of the storage C, FIG. 3 is a plan sectional view of the heat-insulating box 1, FIG. 4 is a longitudinal side view of the heat-insulating box 1, and FIG. 6 is a plan view of the bottom plate 2A of the outer box 2, and FIG. 7 is a side view of the same.

The storage C of the embodiment is a so-called cart-in type refrigerator for storing foods loaded on a cart, and the heat insulating box 1 has a stainless steel outer box 2 opening at the front and a front opening also at the front. Stainless steel inner box 3
And a heat insulating material 4 such as foamed polyurethane filled between the outer box 2 and the inner box 3. A storage chamber 5 is formed in the inner box 3. Reference numeral 6 denotes a hard resin breaker attached to the opening edge of the heat insulating box 1, and reference numerals 7 and 8 denote through holes for communicating with a cooling unit R arranged on the top surface of the heat insulating box 1.

Insulated doors 11, 11 are attached to the front opening of the heat-insulating box 1, and the top surface of the heat-insulating box 1 has a compressor 12, a condenser 13 and the like constituting the cooling unit R. Further, a cooler 16 and a blower 17 are disposed in a cooling chamber 14 formed to communicate with the through holes 7 and 8. At the front end of the bottom wall 1A of the heat insulating box 1, a slope 19 for taking the cart in and out is detachably attached.

The front end of the bottom plate 3A of the inner box 3 is bent downward in a substantially U-shaped cross section to form a front surface 3B having a predetermined width and a parallel lower surface 3C below the upper surface of the bottom plate 3A at intervals. ing. On the other hand, an inner box reinforcing angle 21 is fixed to the front lower surface of the bottom plate 3A over the entire width of the front opening of the heat insulating box 1. The inner box reinforcing angle 21 is a thick steel plate having a substantially U-shaped cross section having a front wall 21A and a rear wall 21B, and the upper wall and the front wall 21A are lowered downward along the bottom plate 3A and the inside of the front surface 3B. Mounted open.

On the inner surface of the front wall 21A of the inner box reinforcing angle 21, an electric heater 22 for preventing dew condensation is adhered and fixed, and on the rear side of the electric heater 22, a heat insulating spacer made of soft foamed polyethylene or the like is provided. Soft insulation 23
Is attached. The soft heat insulating material 23 is press-fitted between the upper surface and the lower surface 3C of the inner box reinforcing angle 21 to press the electric heater 22 against the front wall 21A of the inner box reinforcing angle 21 and the rear surface is several mm behind the rear end of the lower surface 3C. Overhangs.

Also, the rear wall 21B of the inner box reinforcing angle 21
On the front surface, a heat insulating spacer 24 made of, for example, a waterproof plywood is bonded and fixed. The heat insulating spacer 24 extends a few mm below the lower end of the rear wall 21B of the inner box reinforcing angle 21. Furthermore, inner box reinforcement angle 2
A reinforcing member 26 made of a thick steel plate is provided on the rear side of the rear wall 21B.
Extend forward and backward and are fixed to the lower surface of the bottom plate 3A.
The reinforcing member 26 protects and reinforces the bottom plate 3A of the inner box 3 with which the wheels of the cart are in contact, and the front surface thereof is in contact with the rear surface of the rear wall 21B of the inner box reinforcing angle 21.

On the other hand, on the front upper surface of the bottom plate 2A of the outer box 2,
As shown in FIGS. 6 and 7, the outer box reinforcing angle 28 is fixed over the entire width of the front opening of the heat insulating box 1. The outer box reinforcing angle 28 is a thick steel plate having a substantially U-shaped cross section having a front wall 28A and a rear wall 28B, and is mounted upwardly open at a position slightly retreated from the front end of the bottom plate 2A. The front and rear width is a soft heat insulating material 23 and a heat insulating spacer 24.
Approximately matches the interval.

Into the outer box reinforcing angle 28, a heat insulating member 31 made of waterproof plywood or hard foamed polyethylene is adhered and fixed. The heat insulating member 31 has a width across the entire width of the opening of the heat insulating box 1 and a front and rear width that just fits between the front wall 28A and the rear wall 28B of the outer box reinforcing angle 28. It protrudes several mm above the upper ends of the front and rear walls 28A, 28B of the angle 28.

Next, a procedure for assembling the heat insulating box 1 will be described with reference to FIG. First, members other than the bottom plate 2A of the outer box 2 are assembled. That is, the inner box 3 is incorporated into the outer box 2 other than the bottom plate 2A, and is connected by the breaker 6. Then, the inner box reinforcing angle 21, the electric heater 22, the soft heat insulating material 23, the heat insulating spacer 24, and the reinforcing member 26 are fixed to the lower surface of the bottom plate 3A of the inner box 3 as described above.

On the other hand, the outer box reinforcing angle 28 and the heat insulating member 31 are fixed to the upper surface of the bottom plate 2A of the outer box 2 as described above.
An adhesive or an adhesive tape is provided on the upper surface of the heat insulating member 31. Then, a box body other than the bottom plate 2A is placed with its opening facing upward, and the bottom plate 2A of the outer box 2 is combined with the bottom plate 3A of the inner box 3 as shown in FIG.

At this time, since the interval between the soft heat insulating material 23 and the heat insulating spacer 24 substantially coincides with the front and rear width of the outer box reinforcing angle 28, the soft heat insulating material 23 and the heat insulating spacer 24 are positioned at the outer box reinforcing angle 28. The outer box reinforcing angle 28 is guided by these and smoothly enters the inner box reinforcing angle 21. Further, since only the outer box reinforcing angle 28 and the heat insulating member 31 are attached to the bottom plate 2A, the structure is simplified and the weight is significantly reduced as compared with the conventional case. Therefore, the work of combining the bottom plate 2A is also easy and safe.

Then, the upper surface of the heat insulating member 31 is adhered to the inner box reinforcing angle 21 and the area around the bottom plate 2A is screwed to complete the connection between the inner box 3 and the outer box 2. In this state, the front wall 28A of the outer box reinforcing angle 28 is in close contact with the rear surface of the soft heat insulating material 23, is spaced from the bottom plate 3A of the inner box 3, and is separated therefrom. 2
The upper end of 8B is separated from the inner box reinforcing angle 21 with an interval. The space between the bottom plates 2A and 3A behind the inner box reinforcing angle 21 communicates with the space between the other outer box 2 and the inner box 3.

The thickness of the bottom wall 1A including the bottom plates 2A and 3A in this state is, for example, 30 mm. still,
This value can be changed in the range of 25 mm to 35 mm.
By setting the thickness in the above range, the conventional width (20
(about mm), the electric heater 22 can be easily arranged.

Then, an undiluted polyurethane foam solution is injected between the outer box 2 and the inner box 3, and a heat insulating material 4 is filled by an in-situ foaming method. At this time, the bottom plate 2 behind the inner box reinforcing angle 21
Since the space between A and 3A communicates with the space between the other outer box 2 and the inner box 3, the space between the inner box reinforcing angle 21 and FIG.
As described above, the heat insulating material 4 is foam-filled and adhered and solidified to the bottom plates 2A and 3A. Thereby, the heat insulation box 1 is completed.
Here, the interval between the bottom plates 2A and 3A is 25 mm to 35 m.
Since it is less than 30 mm within the range of m, the urethane stock solution can smoothly spread throughout the space behind the inner box reinforcing angle 21.

As described above, the bottom wall 1A has its front portion reinforced by the two reinforcing angles 21 and 28, and the heat insulating material 4 is foam-filled behind it. Is significantly improved. Therefore, the deformation of the heat-insulating box 1 when the storage C is installed is suppressed, and adjustment work such as the height of the heat-insulating doors 11 and the engagement of the latch at the site is reduced. By setting the thickness of the bottom wall 1A to 30 mm, the slope angle of the slope 19 becomes steeper than before, but when the width of the slope 19 is, for example, about 150 mm, the angle increase is about 4 degrees, There is no practical problem.

Further, by filling the bottom wall 1A with the heat insulating material 4, the heat insulating performance of the bottom wall 1A is remarkably improved, and the cooling efficiency is improved. Further, the electric heater 22 generates heat and heats the front surface 3B of the bottom plate 3A of the inner box 3 through the front wall 21A of the reinforcing angle 21 of the inner box.
Condensation can be prevented. A soft heat insulating material 23 is disposed on the rear side of the electric heater 22, and the outer box reinforcing angle 28 is in contact with the soft heat insulating material 23, so that the bottom plate 3 </ b> A of the inner box 3 and the outer box reinforcing angle 2
The thermal leakage of the electric heater 22 can be suppressed by thermally blocking the front wall 28A of the second heater 8 and the dew condensation preventing effect can be improved.

Furthermore, since the outer box reinforcing angle 28 is located within the inner box reinforcing angle 21 at intervals of several mm, direct heat conduction from the inner box reinforcing angle 21 to the outer box reinforcing angle 28 is possible. Can be blocked. Therefore, the heat insulating performance of the bottom wall 1A of the heat insulating box 1 can be further improved.

In the embodiment, the present invention is applied to a refrigerator. However, the present invention is not limited to this, and it is effective to apply the present invention to a refrigerator for keeping food and the like warm.

[0039]

As described in detail above, according to the first aspect of the present invention, the front portion (opening portion) of the bottom wall of the heat insulating box is reinforced by the inner box reinforcing angle and the outer box reinforcing angle over the entire width. Is insulated by the heat insulating member, and the space between the outer case bottom plate and the inner case bottom plate is filled with a foamed heat insulating material, so that the rigidity of the entire bottom wall of the heat insulating box body is significantly improved. Therefore, deformation at the time of installation is suppressed, and adjustment work such as door height and latch engagement at the site can be reduced.

In particular, by filling the foamed heat insulating material, the heat insulating performance of the bottom wall of the heat insulating box is remarkably improved, and the structure of the bottom wall is significantly simplified as compared with the conventional case, so that the cost can be reduced. Therefore, the weight can be reduced, and the assembling workability and the safety at the time of assembling are improved.

Further, the front end of the inner box bottom plate is folded into a substantially U-shaped cross section.
The heater is arranged inside the front of the bottom plate of the inner box.
Therefore, dew condensation on the front surface of the bottom plate of the inner box can be prevented. Also,
Heat insulation material in which the outer box reinforcement angle contacts the rear side of the heater
So that the bottom plate of the inner box and the reinforcing angle of the outer box
To prevent heat leakage from the heater and prevent dew condensation
The effect can be improved.

The bottom of the heat-insulating box body according to the second aspect of the present invention.
If the wall thickness is 25mm to 35mm, the cart
The foam filling of the heat insulating material can be performed without disturbing the
It can be performed smoothly. And the thickness of the bottom wall
Are the dimensions 25 mm to 35 mm as described above?
This also facilitates the arrangement of the heater.

According to the third aspect of the present invention, the bottom wall of the heat insulating box is provided.
The front part (opening part) is the inner box reinforcing angle and the outer part over the entire width.
The box is reinforced by a box reinforcing angle, and the inside is
The outer box bottom plate and inner box behind the angle
Since foam insulation is filled between the bottom plates, the bottom of the insulation box
The rigidity of the entire wall is significantly improved. Therefore, deformation during installation
Of the door at the site and the engagement of the latch
Adjustment work can be reduced.

Also, by filling the foam insulation material,
Ri, co the insulation performance of the bottom wall of the insulating box body is rather improved wrote
In addition, the structure of the bottom wall will be significantly simplified
Cost and weight can be reduced.
Workability and safety during assembly are improved. Change
In addition, the outer box reinforcement angle has a space inside the inner box reinforcement angle.
So that the outer box is reinforced from the inner box reinforcing angle.
Direct heat transfer to the angle can be prevented. Therefore, insulation
Insulation performance of the bottom wall of the box can be further improved
Swell.

Particularly, in the rear wall and the front wall of the inner box reinforcing angle.
In the surface, the break between the rear wall and the front wall
Thermal spacers are provided to further improve heat insulation performance.
The top is planned and the heat insulating spacer is reinforced with the outer box.
It serves as a guide during assembly and plays a role in positioning.
Thus, the workability of assembling the heat insulating box is further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a storage according to the present invention.

FIG. 2 is a perspective view of a heat insulating box of a storage according to the present invention.

FIG. 3 is a plan sectional view of the heat insulating box of the storage according to the present invention.

FIG. 4 is a vertical sectional side view of a heat insulating box of a storage according to the present invention.

FIG. 5 is a vertical sectional side view of a front portion of a bottom wall of a heat insulating box of a storage according to the present invention.

FIG. 6 is a plan view of an outer box bottom plate of the storage of the present invention.

FIG. 7 is a side view of the bottom plate.

FIG. 8 is a diagram illustrating a procedure for assembling the outer case bottom plate.

FIG. 9 is a vertical side view of a heat insulating box of a conventional storage.

FIG. 10 is a plan view of an outer box bottom plate of a conventional storage.

FIG. 11 is a side view of the bottom plate.

FIG. 12 is a longitudinal side view of a front part of a bottom wall of a heat insulating box of a conventional storage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated box 1A Bottom wall 2 Outer box 2A Bottom plate 3 Inner box 3A Bottom plate 3B Front 3C Lower surface 4 Insulating material 5 Storage room 21 Inner box reinforcing angle 22 Electric heater 23 Soft heat insulating material 24 Heat insulating spacer 28 Outer box reinforcing angle 31 Heat insulating member C storage

Claims (3)

(57) [Claims] 1. A storage box comprising a heat insulating box formed by filling a foamed heat insulating material between an outer box and an inner box opening on the front surface, wherein the inner box has a bottom plate front lower surface extending over the entire width of the opening. An inner box reinforcement angle attached, an outer box reinforcement angle attached over the entire width of the opening on the upper surface of the bottom plate front part of the outer box, and a heat insulating member provided between these two angles . Cross section of front end of box bottom plate
It is bent in a U-shape, and a heater is provided inside the front of the inner box bottom plate.
And the outer box reinforcement arm is provided on the rear side of the heater.
A storage in which a soft heat insulating material with which the angle is in contact is disposed, and the foam heat insulating material is filled between a bottom plate of the outer case and a bottom plate of the inner case behind the angle. 2. The storage according to claim 1, wherein the thickness of the bottom wall of the heat insulating box including the outer box and the inner box is 25 mm to 35 mm. 3. A foam break between an outer box and an inner box opened on the front side.
A storage room consisting of a heat-insulating box filled with heat.
To cover the entire width of the opening on the lower surface of the front part of the bottom plate of the inner box.
Inner box with a generally U-shaped cross section
A reinforcing angle and the upper surface of a bottom plate front surface of the outer box.
Attached over the entire width of the opening and open upward.
U-shaped outer box reinforcement angle and inside this outer box reinforcement angle
The outer box reinforcing angle.
Are located at intervals in the inner box reinforcing angle.
In addition, the inner wall reinforcing angle of the rear wall and the front wall inner surface is
Thermal insulation space between the rear and front walls of the outer box reinforced angle
The outer box behind the inner box reinforcing angle
And between the bottom plate of the inner box that the foam insulation was filled
A storage that is characteristic.