Showcase

1. A showcase comprising:

a front wall including a transparent portion defining a showroom for a commodity in cooperation with other walls on a customer side,

a main frame supporting the front wall and other walls,

a mechanical room under the showroom accommodating at least a part of a heating system for heating the commodity,

a support device between the front wall and the main frame, including slide bars spaced apart from each other in a width direction of the front wall and integrally secured to the front wall and guide rails horizontally disposed in the mechanical room, with each slide bar slidably engaged with a guide rail, supporting the front wall and allowing the front wall to be translated to a direction away from the showroom, and

an engagement unit for restricting movement of the front wall, including an elastically deformable engagement member having a projection and an engagement plate having a hole for receiving the projection,

wherein the projection of the engagement member engages with the edge of the hole when the front wall is positioned closest to the main frame in the closed position.

2. The showcase according to claim 1 , wherein the engagement unit further includes a release lever for deforming the engagement member to release the projection from the hole.

3. The showcase according to claim 2 , wherein the engagement unit further includes a magnet.

4. The showcase according to claim 2 , wherein the engagement unit further includes a magnetic packing for securing airtightness of the showroom.

5. The showcase according to claim 1 , wherein the engagement unit further includes a magnet.

6. The showcase according to claim 1 , wherein the engagement unit further includes a magnetic packing for securing airtightness of the showroom.