JP2006138111A - Door closing device for showcase - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the deformation of a coil spring of a door closing device even if a sliding door lifts. <P>SOLUTION: The door closing device for a showcase has the coil spring 4 provided at the upper part of the sliding door 2 of the showcase to energize the sliding door 2 moving to open/close guided along a rail, always urged in a closing direction. The coil spring 4 is fastened to a fixing metal fitting 9 with one end connected to an upper rail 7 and with the other end mounted to the sliding door 2. The upper end part 9a of the fixing metal fitting 9 is projected upward from the upper face of the outer peripheral surface of the coil spring 4. When the sliding door lifts, the upper end part 9a of the fixing metal fitting 9 collides against the upper rail 7 ahead of the coil spring 4. As a result, there is no danger of the coil spring 4 being deformed abutting on the upper rail. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a showcase having a sliding door, and more particularly to a door closing device that constantly biases a sliding door in a closing direction by a coil spring.

  As a showcase having a sliding door, for example, a sliding door made of a glass plate is provided on the back and front of the showcase body in which the product storage room is cooled or heated, and the products arranged on the shelf by opening the sliding door on the back There is a reach-in case where the user opens the sliding door and is taken out by the customer. In that case, if you forget to close the sliding door, the thermal efficiency decreases due to the intrusion of outside air, so the sliding door is automatically activated by urging the sliding door with a spring or by tilting the closing door on the rail of the sliding door. A door closing device that can be closed automatically has been developed, and such door closing devices are described in Patent Literature 1 and Patent Literature 2.

  3 to 5 illustrate a conventional spring-type door closing device of this type of showcase again. First, the figure is a schematic front view of the showcase, and two large and small sliding doors 2 are provided in a left-right sliding manner above and below the front and back of the showcase body 1. The sliding door 2 is movably supported on a lower rail (not shown) via wheels 3, and the upper portion of the sliding door 2 is sandwiched from the front and rear by an upper rail (not shown) having an inverted U-shaped cross section and is slidably guided.

FIG. 4 is a partially enlarged view showing, for example, the upper part of the upper left sliding door 2 in FIG. As shown in FIG. 3, the sliding door 2 is provided with a coil spring 4 as a door closing device for preventing forgetting to tighten, which normally biases the sliding door 2 in the closing direction (arrow direction). One end (left end) of the coil spring 4 is connected to the upper rail 7 via an inverted L-shaped fixing bracket 6 fastened with a screw 5, and the other end (right end) is reversely attached to the sliding door 2 with a screw 8. It is hung on an L-shaped fixing bracket 9. When the sliding door 2 is opened in the direction of the opposite arrow, the coil spring 4 is stretched, and when the hand is released, it automatically returns to the illustrated door closed state by the restoring force of the coil spring 4.
JP 2002-181428 A Japanese Utility Model Publication No. 2-53438

  In a conventional showcase having a spring-type door closing device, when the sliding door 2 is vigorously opened and collides with a stopper (not shown), or the lower portion of the sliding door 2 is opened by placing a hand, the sliding door 2 is shown in FIG. There is a risk that the coil spring 4 is sandwiched between the sliding door 2 and the upper rail 7 and deformed. When the coil spring 4 is deformed, the returning action to the sliding door 2 becomes insufficient, and the sliding door 2 cannot be closed in some cases.

  Accordingly, an object of the present invention is to prevent a coil spring from being deformed even when a sliding door is lifted in a spring-type door closing device of a showcase.

  In order to solve the above-mentioned problems, the present invention includes a coil spring at the upper part of the sliding door that normally biases the sliding door of the showcase that is guided by the rail to open and close in the closing direction. In the showcase door closing device, the other end of which is hung on a fixing bracket attached to the sliding door, and the upper end of the fixing bracket protrudes above the upper surface of the outer peripheral surface of the coil spring. To do.

  According to the present invention, when the sliding door is lifted, the upper end portion of the fixing fitting attached to the sliding door hits the upper rail before the coil spring. As a result, the coil spring does not hit the upper rail and therefore there is no risk of deformation.

  FIG. 1 is a front view of an essential part of a sliding door of a showcase showing an embodiment of the present invention. In addition, the same code | symbol shall be used for the part corresponding to a prior art example. In FIG. 1, the difference from the prior art of FIG. 4 is that a sliding door side fixing fitting 9 formed by bending from a steel plate is formed in an inverted V shape, and its upper end 9a is formed from the upper surface of the outer peripheral surface of the coil spring 4. Is also a point that protrudes upward at a height H.

  Therefore, when the sliding door 2 is opened as shown in FIG. 2, even if the spring fixing side of the sliding door 2 is lifted, the upper end portion of the fixing bracket 9 abuts against the upper rail 7 before the coil spring 4. Therefore, the coil spring 4 does not hit the upper rail, and as a result, there is no danger that the coil spring 4 is sandwiched between the sliding door 2 and the upper rail 7 and deformed.

It is a principal part front view of the sliding door of the showcase which shows embodiment of this invention. It is a figure which shows the state which the sliding door in FIG. 1 lifted. It is a schematic front view of the showcase which has a sliding door. It is an enlarged view of the upper part of the sliding door in FIG. It is a figure which shows the state which the sliding door in FIG. 4 lifted.

Explanation of symbols

2 Sliding door 4 Coil spring 7 Upper rail 9 Fixing bracket

Claims (1)

The upper part of the sliding door is provided with a coil spring that normally urges the sliding door of the showcase that is guided by the rail to open and close in the closing direction. One end of the coil spring is connected to the rail and the other end is attached to the sliding door. In a showcase door closing device hung on a fixed fixture,
A door closing device for a showcase, wherein an upper end portion of the fixing bracket protrudes upward from an upper surface of an outer peripheral surface of the coil spring.

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