JPH0452636Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to a door structure for a cold storage cabinet installed in a cold storage cabinet.

b. Prior Art FIG. 7 shows the door structure of a conventional cold storage. In the figure, 1 is the cold storage main body, 2 is a frame provided at the rear of the cold storage main body 1, and 3 is a door structure of a conventional cold storage. , 4 are doors attached to the frame 2 via hinge members 5, 6, and 7, 8 are locking devices for locking the doors 5, 6 in the closed state. The above-mentioned doors 3 and 4 are configured to be able to open in both directions (double door) in the directions of arrows A and B around the hinge members 5 and 6.
When the door is closed, it is locked by locking devices 7 and 8.

c. Problems to be Solved by the Invention As mentioned above, the conventional doors 7 and 8 are generally constructed in a double-opening type, which causes the following inconveniences.

That is, in order to fully open the doors 7, 8, the locking devices 7, 8 must be unlocked and both doors 3, 8 must be unlocked.
4 had to be opened one by one, and the door closing operation was complicated. Moreover, double doors 3 and 4
However, there were cases where loading and unloading of cargo was inconvenient. Under these circumstances, there has been a demand for a folding door that is supported by only one hinge member 5 or 6. However, in this case, since insulated doors are generally quite heavy, one side is supported. It was difficult to make the hinge member 5 or 6 bear the entire load.

Furthermore, in the past, the hinge members 5, 6, locking devices 7, 8, etc. were exposed to the outside as protrusions, which gave a very poor appearance, and there was a risk of the luggage getting caught on those protrusions. It was hot.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to provide a door structure for a cold storage box that does not have the above-mentioned disadvantages.

d. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes: (A) a door consisting of a pair of foldably hinged heat insulating plates; a hinge member that rotatably couples one of the heat insulating plates to the cold storage main body; (C) a rail member attached to the lower edge and the upper edge of the opening of the cold storage main body; and (D) the pair. a rolling member that is attached to the lower and upper parts of the other heat insulating board and that engages and rolls on the rail member, and guides the rolling member along the rail member. In some cases, the door is opened with the pair of heat insulating plates folded in half.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 6.

Figure 1 shows a refrigerated truck 1 equipped with a refrigerated box 10 at the rear.
1 and 2 are perspective views of the rear part of the cold storage 10, and a door 12 configured to be foldable in two is attached to the rear of the cold storage 10 so as to be openable and closable. That is, as clearly shown in FIGS. 2 and 3, the above-mentioned door 12 is constructed by connecting a pair of heat insulating plates 13a and 13b each having a heat insulating material such as styrofoam inside with a hinge member 14. The right end of one of these heat insulating plates 13a is attached to the cold storage main body 15 via hinge members 17a and 17b fixed to the rear end surface 16 of the side wall of the cold storage main body 15.
Therefore, the door 12 has hinge members 17a and 17b.
A pair of heat insulating plates 13a and 13b constituting the door 12 are attached to each other so as to be rotatable.
It can be folded in half. It should be noted that a fifth
As clearly shown in the figure, notches 19 and 20 are formed, respectively, and protrusions 21a and 21b of the heat insulating plates 13a and 13b are arranged in correspondence with these notches 19 and 20, respectively. Furthermore, a stopper 22 made of hard vinyl chloride and a gasket 23 made of rubber are adhered to the notch 20 of the left heat insulating plate 13b.

Further, as shown in FIGS. 3 and 4, stays 24 and 25 having a substantially L-shaped cross section are attached to both the upper and lower parts of the left end of the left heat insulating plate 13b, and these stays 24 and 25 are equipped with rolling members. are installed respectively. That is, the upper stay 24 has a support shaft 26.
is vertically erected, and a guide roller 27, which is a rolling member, is rotatably attached to this support shaft 26. On the other hand, casters 28 are attached to the lower stay 25, and the support base 28 is spaced apart from the bottom wall 15b of the cold storage main body 15 in order to flow cold air.
The caster 28 is disposed below the slatted board 30 placed and fixed on the slatted board 9. The caster 28 includes a support pin 31 vertically attached to the stay 25, a roller support member 32 rotatably attached to the support shaft 31 and having a substantially U-shaped cross section.
A support shaft 33 penetrating the support member 32;
It consists of a caster wheel 34 as a rolling member rotatably attached to this support shaft 33. The above-mentioned support pin 31 and support shaft 33 are arranged so that their axial directions are perpendicular to each other, and the caster wheel 34 is connected to the support pin 3 with respect to the stay 25.
1, and is configured to be able to rotate around a horizontally arranged support shaft 33. Note that the support shaft 26 of the guide roller 27 and the support pin 31 of the caster 28 are arranged on the same vertical axis.

In addition, as shown in FIGS. 3 and 4, the upper wall 15a and the bottom wall 15b of the refrigerator main body 15 have rail members 35, 36 each having a U-shaped cross section on their rear edges.
are installed so as to extend at a slight angle with respect to the lateral direction, and these rail members 3
5 and 36, the previously described guide roller 27 and caster wheel 34 are fitted in a rolling manner. Note that the width of the caster wheel 34 and the width of the fitting recess 36a of the rail member 36 are configured to be approximately equal to each other, so that the caster wheel 34 can roll smoothly within the rail member 36 without causing rattling. It's becoming like that. Also, door 1
2, since greater human power is applied during the closing operation, the support shaft 33 of the caster wheel 34 is attached to the support pin 31 of the caster 28 as shown in FIG.
It is arranged at a position (offset L) offset from the axis of the door 12 in the direction of opening of the door 12 (direction of arrow C).

Further, an engagement protrusion 37 is provided on the left end surface of the left heat insulation plate 13b, and is configured to fit into an engagement groove 38 provided in an inclined shape on the side wall 15c of the cold storage main body 15. In addition, the above-mentioned heat insulation board 1
3b is provided with a handle 39 and an auxiliary handle 40 as shown in FIG. 2, and by rotating the bundle 39, a lock mechanism (not shown) provided on the heat insulating plate 13b is activated. ing. Also,
A rubber seal member 42 is attached to the entire circumference of the rear opening 41 of the cold storage main body 15, and the side edges of the heat insulating plates 13a, 13b are crimped to this sealing member 42, thereby sealing the cold storage main body 15 and the door 12. A seal is created between the two.

Next, the opening/closing operation of the door 12 will be explained with reference to FIG. 3.

First, when opening the door 12, grasp the bundle 39 and rotate it to release the lock between the door 12 and the refrigerator main body 15, and then open the handle 39.
The door 12 is energized along the direction of arrow C (longitudinal direction of the rail members 35, 36) in FIG. Accordingly, the guide roller 27 and the caster wheel 34 are guided while rolling within the rail members 35 and 36, so that the pair of heat insulating plates 13 forming the door 12 as shown by the dashed line in FIG.
a, 13b are arrows D, E with the hinge member 14 as the center.
At the same time, the heat insulating plate 13a rotates in the direction of arrow F with respect to the cold storage main body 15 around the hinge members 17a and 17b. Finally, the pair of heat insulating plates 13a and 13b are folded in half and placed in the open door position, thereby opening the rear opening 41 of the refrigerator main body 15.

Further, the operation of closing the door 12 is performed using the handle 39.
This is done by grasping and pulling in the direction of arrow C'. When the handle 39 is pulled in the direction of arrow C', the guide roller 27 and the caster wheel 34 roll within the rail members 35 and 36 in the opposite direction to the opening operation described above, and the heat insulating plate 13a becomes hinged. Member 17a, 1
At the same time, the heat insulating plates 13a and 13b rotate in the direction of the arrow F' about the hinge member 14.
It is rotated in the D′ and E′ directions. And in the final stage,
The engagement protrusion 37 is fitted into the engagement groove 38, and the pair of heat insulating plates 13a and 13b are arranged on the same plane, resulting in a closed state. Thereafter, by rotating the handle 39, the door 12 is locked to the refrigerator main body 15. In addition, at this time, a pair of heat insulating plates 13a, 13b
If the auxiliary handle 40 is not located completely on the same plane but protrudes rearward in a dogleg shape, the door 12 is completely closed by pushing in the auxiliary handle 40.

According to such a door structure, the operator can open and close the door 12 with one hand and in one motion, and when the door 12 is opened, the pair of heat insulating plates 13a and 13b are folded in half. Therefore, there is no problem with unloading and loading operations. In particular, in the case of this example, an offset L is provided between the support pin 31 and the support shaft 33 as shown in FIG. 6, so that the rotation of the caster 28 is smooth when the door 12 is closed. As a result, the caster wheel 34 can follow the rail member 36 in a good condition, and the closing operation can be performed easily and smoothly with a small force. Also, caster wheel 3
4 receives the weight of the door 12, so even if the door 12 is heavy, the hinge members 14, 1
The burden on 7a and 17b can be reduced.
Furthermore, compared to the conventional case, there is no need to provide a protrusion such as a locking device on the outside of the door 12, so the appearance of the refrigerator 10 is improved. Also,
At the connecting portion between the pair of heat insulating plates 13a and 13b,
As shown in FIG.
Since b is configured to correspond to the inside of the notch 19 of the other heat insulating board 13d, it is possible to prevent foreign matter from being caught when the door 12 is closed, and there is no fear that foreign matter will enter the inside of the cold storage box 10.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment.
Various modifications and changes are possible based on the technical idea of the present invention.

For example, the arrangement of the guide rollers 27 and caster wheels 34 as rolling members, the shapes of the rail members 35 and 36, etc. can be changed in various ways.
Furthermore, it goes without saying that the position of the door 12 is not limited to the rear part of the cold storage main body 15, but can also be applied to a case where the door 12 is provided on the side thereof.

e Effects of the invention As described above, the present invention consists of a door made of a pair of heat insulating plates that can be folded into two, one of the heat insulating plates is rotatably attached to the refrigerator body via a hinge part, and the other The rolling members arranged on both the upper and lower parts of the heat insulating board are engaged with the rail members arranged on the main body of the refrigerator and are caused to roll, so the door can be opened and closed with one hand, etc. This can be done extremely easily, and since the pair of heat insulating plates are folded in half when the door is opened, the door does not become a hindrance to unloading and loading operations. Further, since the weight of the door can be borne by the lower rolling member, it is possible to significantly reduce the weight load applied to the hinge member provided only on one side. Further, according to the configuration of the present invention, it is possible to reduce the number of protrusions on the outside of the door, and it is possible to improve the appearance of the refrigerator.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the refrigerator, in which Figure 1 is a side view of the refrigerator, Figure 2 is a perspective view of the rear of the refrigerator, and Figure 3 is the figure 2. FIG. 4 is a sectional view taken along the line - in FIG. 3, FIG. 5 is an enlarged sectional view of the connecting portion of a pair of heat insulating plates, and FIG. 6 is a view taken from the direction of the arrow in FIG. 3. , FIG. 7 is a perspective view showing the door structure of a conventional refrigerator. 10...Cold box, 11...Cold storage car, 12...Door, 13a, 13b...Insulating board constituting the door,
14...Hinge member, 15...Cold box main body, 17
a, 17b...hinge member, 24, 25... stay, 27... guide roller, 28... caster, 34... caster wheel, 35, 36... rail member.

Claims (1)

[Claims for Utility Model Registration] (A) A door consisting of a pair of heat insulating plates that are hinged together so that they can be folded; (B) One of the pair of heat insulating plates is rotatably coupled to the main body of the refrigerator. (C) a rail member attached to the lower and upper edges of the opening of the refrigerator body; (D) a rail member attached to the lower and upper parts of the other of the pair of heat insulating plates, and , a rolling member that engages with and rolls on the rail member, and the pair of heat insulating plates are folded in half by guiding the rolling member along the rail member. A door structure for a refrigerator, characterized in that it is configured to open when the door is open.