Door unit for cold storage

1. A door unit for a cold storage including a main body having an outer front surface and two outer side surfaces orthogonal thereto, whose front surface opening is closed in an openable and closable manner by means of a door having an outer front face and two outer side faces orthogonal thereto, whose one outer side is pivotally supported on the main body, the door unit including:

a handle pivotally mounted on one outer side face of the door on its non-pivotal side at a location of a predetermined height so as to pivot about an axis extending horizontally between the two outer side faces of the door;

a latch receiver provided on the forward portion of one outer side surface of the main body at a height corresponding to the height of the handle, the latch receiver having a roller pivotally mounted thereon; and

the handle integrally comprising an elongated grip adapted to be grasped by fingers of a hand along its length and a latch detachably engageable with the latch receiver so that the latch engages the latch receiver in a state that a length direction of the grip is substantially vertical when the door is in a fully closed position by action of the latch and extends along the one outer side face of the door, and when the grip is pivotally moved in a direction away from the front surface of the main body, to reach a position where the length direction of the grip is relative to a horizontal plane at a predetermined angle, then both the pivotal movement of the handle is stopped by a pivoting limiting means and the latch disengages from the latch receiver; wherein the latch is protruding portions from a rear surface of the handle that extend rearwardly toward the main body and then extend downwardly for engaging the roller, when the grip is substantially vertical, and includes a roller receiver at a corner formed by the portions extending rearwardly then extending downwardly, and

when the grip is pivotally moved in a direction rearward to a substantially vertical position, the latch engages the latch receiver from upward, the roller is received in the roller receiver, and the latch engages the latch receiver completely.

2. A door unit for a cold storage including a main body having an outer front surface and two outer side surfaces orthogonal thereto, whose front surface opening is closed in an openable and closable manner by means of a door having an outer front face and two outer side faces orthogonal thereto, whose one outer side is pivotally supported on the main body, the door unit including:

a handle pivotally mounted on one outer side face of the door on its non-pivotal side at a location of a predetermined height so as to pivot about a pivot shaft having an axis extending horizontally between the two outer side faces of the door;

a latch receiver provided on the forward portion of one outer side surface of the main body at a height corresponding to the height of the handle, the latch receiver having a roller pivotally mounted thereon; and

the handle integrally comprising an elongated grip adapted to be grasped by fingers of a hand along its length and a latch detachably engageable with the latch receiver so that the latch engages the latch receiver in a state that a length direction of the grip is substantially vertical when the door is in a fully closed position by action of the latch and extends along the one outer side face of the door, and when the grip is pivotally moved in a direction away from the front surface of the main body, to reach a position where the length direction of the grip is relative to a horizontal plane at a predetermined angle, then both the pivotal movement of the handle is stopped by a pivoting limiting means and the latch disengages from the latch receiver;

wherein the latch is protruding portions from a rear surface of the handle that extend rearwardly toward the main body and then extend downwardly for engaging the roller, when the grip is substantially vertical, and includes a roller receiver at a corner formed by the portions extending rearwardly and then extending downwardly such that a distance from the pivot shaft of the handle to the latch progressively increases toward a lower end of the downwardly extending end of the latch;

when the grip is pivotally moved in a direction rearward to a substantially vertical position, the latch engages the latch receiver from upward, the roller is received in the roller receiver, and the latch engages the latch receiver completely; and

a protrusion extending toward the pivot shaft is formed on the latch at a location below the roller receiver of the latch and a distance from the pivot shaft to a forward end of the protrusion progressively increases from the protrusion toward the lower end of the latch.

3. The door unit for a cold storage as set forth in claim 1 , wherein the handle comprises a stopper which regulates movement of the door toward the main body in the state that the latch engages the latch receiver.

4. The door unit for a cold storage as set forth in claim 1 , wherein the handle comprises a handle side lock insertion hole which is aligned with a main body side lock insertion hole provided in the latch receiver in the state that the latch engages the latch receiver.

5. The door unit for a cold storage as set forth in claim 2 , wherein the handle comprises a stopper which regulates movement of the door toward the main body in the state that the latch engages the latch receiver.

6. The door unit for a cold storage as set forth in claim 2 , wherein the handle comprises a handle side lock insertion hole which is aligned with a main body side lock insertion hole provided in the latch receiver in the state that the latch engages the latch receiver.

7. The door unit for a cold storage as set forth in claim 3 , wherein the handle comprises a handle side lock insertion hole which is aligned with a main body side lock insertion hole provided in the latch receiver in the state that the latch engages the latch receiver.

8. The door unit for a cold storage as set forth in claim 5 , wherein the handle comprises a handle side lock insertion hole which is aligned with a main body side lock insertion hole provided in the latch receiver in the state that the latch engages the latch receiver.