JPS631169Y2 - - Google Patents

Description

[Detailed description of the invention] Sliding doors, which are conventionally used to airtightly close the entrances and exits of large commercial freezers, refrigerators, or hot storage cabinets, are pivoted on a bracket fixed to the top of the door. Guide rail 1 with wheels mounted approximately horizontally on the outer wall surface of the refrigerator above the doorway
It is provided so that it is engaged with and suspended from the rail and slid by the rolling of the wheels guided by the rail, and the packing is fixed to the inside periphery and bottom of the door, and corresponds to the entrance/exit position on the storage body side of the guide rail. An inward slope part 2 and a downward slope part 3 are formed in the section (Fig. 1). When the door slides and reaches the entrance/exit position, the wheels on the guide rail 1 roll onto the inward slope part 2. The door is guided inward and the surrounding packing is pressed against the area around the entrance, and at the same time, the wheels move into the downward slope section 3 and descend, lowering the door and pressing the bottom packing against the floor. The entrances and exits are now closed airtight.

However, this sliding door is large and heavy (several tens of kilograms), so in order to reopen the door after it has been airtightly closed as described above, you must first push up the heavy door. At the same time, the wheel must be moved out of the downward slope part 3 by rubbing against the frictional resistance between the bottom packing and the floor surface, and at the same time, the surrounding packing pressed around the entrance by the guiding action of the inward slope part 2 is removed. This also requires an extremely large amount of effort (to the extent that a man has to pull with all his might) especially when opening the door for the first time since it has to be separated while resisting the frictional resistance from the surrounding area.
However, if the inner surface of the door is frozen, it becomes even more difficult to open the door, so the challenge is to somehow make the initial movement of opening the door as easy and light as possible. This has been considered to be the case.

The present invention has been developed in view of the above circumstances, and by replacing the conventional configuration with a guide rail of a special configuration, it solves the above conventional drawbacks and achieves an extremely good sliding door. This makes it possible to close the door in an airtight manner, and in particular, the initial movement of opening the door can be performed extremely easily.

That is, to explain the configuration of the present invention with reference to its embodiments, in a sliding door 6 having an optional configuration for airtightly closing an entrance 5 of a large freezer 4, etc., a guide rail, which was conventionally configured with a single rail, is used. 1 is provided by an upper surface rail 1a and a lower surface rail 1b fixed in parallel with a horizontal support plate 7 in between,
A downwardly sloped portion 3a is formed on the top rail 1a at a portion corresponding to the doorway 5 position of the freezer 4, and an inwardly sloped portion 2a is formed at a portion of the bottom rail 1b which also corresponds to the doorway 5 position. ,
A pair of guide rollers 1 are attached to a shaft 10 fixed to the bottom plate 9 of a square-shaped bracket 8 fixed to the upper surface of the door 6 at an interval approximately equal to the wall thickness of the lower rail 1b.
1 and 11 are rotatably mounted on a shaft, and a grooved wheel 15 is mounted on a shaft 14 horizontally mounted between the upper inner and outer plates 12 and 13 so as to be rotatable and slidable on the shaft 14, The wheels 15 of the bracket 8 are rotatably engaged on the upper rail 1a, and the guide rollers 1
The lower rail 1b is inserted between 1 and 11, and the door 6 is suspended from the upper rail 1a, and the door 6 that slides (wheels roll) on the upper rail 1a is located at the entrance 5 position At this time, the wheels 15 are moved down onto the downward slope part 3a of the upper surface rail 1a, and the door 6 is lowered and the bottom surface is packed 16.
is brought into pressure contact with the floor surface 17, and the guide rollers 11, 11 are guided into the inwardly sloped portion 2a of the lower surface rail 1b to move the door 6 inward to bring the peripheral packing 18 into pressure contact with the periphery of the entrance/exit 5. When the door 6 moves inward, the wheel 15 is kept stationary on the linear upper rail 1a, and its shaft 14 slides inward together with the bracket 8 (that is, the door 6 as well).

The guide rail 1 has a part of its horizontal support plate 7, for example, a vertical plate part 19, connected to the entrance 5 of the freezer 4.
Install it by properly fixing it to the upper outer wall surface.

Reference numeral 20 indicates an inward slope guide and stopper attached to the lower outer surface of the door 6, and when the door 6 is slid and closed in the doorway 5 as described above, the floor surface 17
The roller 21 installed on the side contacts and guides the inward slope guide 20a to press and support the door 6 toward the entrance/exit (inward), and also collides with the stopper 20b to stop the sliding advance of the door 6 at that position. It is something.

In the above configuration, the present invention is such that the wheels 15, which function to primarily slide the door 6, roll on the upper surface rail 1a in a straight line, and the downward slope portion 3
A, and the action of moving the door 6 inward is carried out by sandwiching it with the inwardly sloped portion 2a of the lower rail 1b, which is provided separately as a mechanism exclusively for inward movement. This is done by the guide rollers 11, 11, and even when the wheels 15 move inward, the wheels 15 on the upper surface rail 1a continue to move forward linearly, and only the shaft supporting the wheels 15 moves forward. 14 is made to slide inward together with the bracket 8, so the main power is used to move the door 6.
The inward movement of the door is automatically carried out during the process of lightly and linearly sliding the door, making it possible to achieve a strong and precise airtight closing very easily, and when opening a closed door, it is possible to move the door inward automatically. The downward slope part 3 is pushed up as described above.
Because the synergistic effect is to allow the wheel to escape from the inward slope part 2 which is pressed extremely tightly due to the packing action,
In particular, the initial movement of opening the door was extremely heavy, but in the case of the present invention, the door is pushed straight in the direction of opening the door, and the wheels are rolled out of the downward slope section 3a. By simply pressing the door, the guide rollers 11, 11 come into contact with the inwardly sloped portion 2a and roll lightly along with the linear pushing motion, so that the door can be separated from the pressed state with the doorway very easily. With the initial movement force that is a fraction of that of the conventional one,
An excellent effect of opening the door easily and easily can be exhibited.

[Brief explanation of drawings]

Fig. 1 is a front view, plan view and side view of a conventional guide rail, Fig. 2 is an installation perspective view of an embodiment of a sliding door, Fig. 3 is a partially enlarged side view of Fig. 2; Figure 4 shows a front view, a side view, and a bottom view of the guide rail in the present invention. Number, 1...Guide rail, 1a...Top rail, 1b...Bottom rail, 2, 2a...Inward slope section, 3, 3a...Downward slope section, 4...Large freezer, 5... Doorway, 6...Sliding door, 7...Horizontal support plate, 8...Bracket, 9...
... Bottom plate, 10 ... Axis, 11, 11 ... Guide roller, 14 ... Axis, 15 ... Wheels, 16 ... Bottom packing, 17 ... Floor surface, 18 ... Peripheral packing, 20 ... Inward slope guide Cum stopper, 21
……roller.

Claims (1)

[Claim for Utility Model Registration] In a sliding door that airtightly closes the entrance/exit of a large freezer, etc., the upper surface rail 1a has a guide rail 1 fixed in parallel with a horizontal support plate 7 in between.
and the lower surface rail 1b, and the upper surface rail 1a
A downward slope portion 3a is formed at a portion of the lower rail 1b corresponding to the entrance/exit position, and an inward slope portion 2a is formed at a portion of the lower rail 1b corresponding to the entrance/exit position.
On the other hand, a pair of guide rollers 11, 11 are provided at a distance from each other on the bottom plate of a bracket 8 fixed to the upper surface of the door, and a wheel 15 is mounted on a shaft 14 suspended horizontally above the door. The wheels 15 of the bracket 8 are rotatably engaged with the upper surface rail 1a, and the guide roller 1
A lower rail 1b is inserted between 1 and 11, and the door is suspended from the upper rail 1a, and when the door that slides on the upper rail 1a is at the entrance/exit position, the wheels 15 are moved downward from the upper rail 1a. The guide rollers 11,
11 is guided into the inwardly sloped portion 2a of the lower surface rail 1b, the door is moved inward, and its peripheral packing is brought into pressure contact with the vicinity of the entrance, and when the door is moved inwardly, the wheels 15 are placed on the linear upper surface rail 1a. A sliding door for a large freezer, etc., characterized in that the shaft 14 is provided so as to slide inward together with the bracket 8 when the door is stopped.