JPH0551753B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to a device for airtightly closing an entrance to a refrigerated warehouse or the like, and in particular, a device in which a panel body for opening and closing the opening is guided by a rail. The object is a type in which the opening is opened and closed while moving laterally along the partition wall, like a sliding door, and the panel body is pressed tightly against the partition wall in the closed position.

[Conventional technology]

For example, in a sliding door device, in order to airtightly close an entrance/exit, it is necessary to move the door panel from a running surface defined by a rail on the partition wall toward the entrance and bring it into close contact with the partition wall. One method for moving the door panel toward the partition wall is to move a portion of the rail obliquely in parallel toward the doorway (Japanese Patent Publication No. 10434/1983). In this case, the fixed rail, which occupies most of the rails, and the movable rail, which is provided in a closed state corresponding to the roller position when the door panel is in the closed state directly facing the doorway, are configured in a straight line, and the movable rail is parallel when facing the partition wall. By moving the door panel, the door panel is brought into close contact with the partition wall via the rollers supported on the rail.
The number of movable rails corresponding to the number of rollers provided is the same, and the movable rails are generally provided at two locations above the entrance/exit. In the present invention, the panel body is moved back and forth using a movable rail that tilts back and forth.
It is known from the publication No. 31658.

[Problem that the invention seeks to solve]

In the conventional air-tight sealing device that moves the door diagonally in parallel, there is a safety problem because each roller rides on the movable rail and at the same time suddenly falls, regardless of the user's intention. In order to prevent the rollers on the closed end side from sinking when the door is opened and closed, it is necessary to move the movable rail for the rollers on the open end side downward, which complicates the rail structure accordingly.

In this regard, if the door is moved back and forth using a movable rail that tilts back and forth, the above problems can be eliminated. However, there are problems when applying this type of conventional device to a door device intended for airtight sealing.

In order to move the door from the closed position to the running position, the door is slightly lifted and pulled, but at this time, only the door is lifted and there is a risk that the door roller (roller) may come off the movable rail. Injuries may occur when the door wheels come off, especially when the weight of the door is large, resulting in serious personal injury.

In order to achieve an airtight state, the door must be pressed against the gasket with an appropriate pressure;
Since the door roller (roller) of Publication No. 31658 has a large free movement in the width direction, the amount of back-and-forth movement of the movable rail and the door do not necessarily match, and the seal cannot be pressed and deformed appropriately.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air-sealing device for an opening that has a simple structure, can be operated safely, and can reliably seal air-tightly.

[Means to resolve the problem]

The present invention provides a rail 6 provided on the partition wall 1 and a rail 6 provided on the partition wall 1.
A panel body 4 that opens and closes an opening 2 provided along a rail 6, and a pair of rollers 5 supported by roller brackets 10 fixed to both sides of the upper part of the panel body 4.
and a gasket 8 attached to the periphery of the opening 2 or the panel body 4, and a fixed rail 6A whose rail 6 occupies most of the running area of the roller 5;
At the closed position A2, the panel body 4 is moved to the closed position A.
In the air-sealing device for an opening, the movable rail 6B includes a swing shaft 16 and a swing shaft 16.
Rail arm 17 fixed to the top surface of 6 and rail arm 1
A support frame 18 has a rail rod 15 fixed to the upper end of the support frame 18, and both ends of its swing shaft 16 are fixed to the partition wall 1.
The support frame 18 includes a stopper 20 that receives the movable rail 6B in a nearly vertical forward tilted position, and a rear tilted position that tilts the movable rail 6B toward the bulkhead 1 side. A stopper 21 for receiving in the posture and a protruding wall 18c protruding forward of the partition wall 1 along the upper end surface of the panel body 4 are respectively provided;
5. Free movement in the width direction: A rolling groove 11a that fits externally without a gap, and front and rear flanks 11b and 11c that are continuous to the rolling groove 11a and slope outwardly, forming a V-shaped cross section. The vertical distance E between the panel body 4 and the projecting wall 18c at the closed position A3 is set to be smaller than the groove depth D of the roller 5.

[Effect]

When the panel body 4 is on the movable rail 6B, the movable rail 6B is inclined slightly forward from the vertical position, so the panel body 4 does not immediately descend to the blocking position A3.

The roller 5 is fitted onto the rail rod 15 with no free movement in the width direction. Furthermore, movable rail 6B
The amount of forward and backward tilting is precisely regulated by a pair of stoppers 20 and 21. Therefore, the panel body 4 moves back and forth in accordance with the amount of back and forth movement of the movable rail 6B, and particularly applies an appropriate deforming force to the packing 8.

Panel body 4 and support frame 1 at blocking position A3
Since the vertical distance E between the projecting wall 18c and the roller 5 is set smaller than the groove depth D of the roller 5, when the panel body 4 is lifted and pulled slightly toward the closed position A2, the upper part of the panel body 4 is not moved by the projecting wall 18c. It is possible to prevent the roller 5 from coming off the rail rod 15 by catching it.

〔Effect of the invention〕

According to the air sealing device of the present invention, unless the user performs a switching operation with a clear intention, the panel body 4 can be positioned on the running surface side and prevented from accidentally falling. Furthermore, when moving the panel body 4 from the blocking position A3 to the running surface side, the support frame 1 prevents excessive upward movement of the panel body 4.
It is possible to prevent the roller 5 from coming off the movable rail 6B and the panel body 4 from falling to the floor surface by regulating the projecting wall 18c of No. 8, thereby improving the safety of the air sealing device as a whole.

The roller groove 11 is a floating groove 11a that fits externally with respect to the rail rod 15 without any free movement in the width direction.
The front and rear flanks 11b and 11c form a V-shaped cross section to prevent the rollers 5 from moving back and forth relative to the rail rod 15, and move the panel body 4 by the same amount as the movable rail 6B. Allowed to move forward and backward. Thereby, in the sealing position A3, the gasket 8 can be appropriately pressed and deformed to ensure airtight sealing. In particular, when the sealed state is maintained only by the weight of the panel body 4, excessive pressing force is applied to the gasket 8, leading to early deterioration, or cold air leaking out from the opening 2, resulting in energy loss. can be resolved.

〔Example〕

Figure 2 is a front view, where 1 is the bulkhead of the building;
Reference numeral 2 denotes an opening provided in the partition wall 1 for access. In order to close the opening 2 in an airtight manner, the air sealing device 3 of the present invention is provided on the outside of the front surface of the opening 2.

The air sealing device 3 includes a rectangular panel body 4 that moves in the left and right directions to open and close the opening 2, and rollers 5 provided at two places on the left and right of the upper part of the panel body 4, which run along the outer surface of the partition wall 1. A rail 6 on the side of the bulkhead 1 to guide, and a rubber stopper 7 on the side of the bulkhead 1 that prevents lateral movement of the panel body 4 at each of the open position A1 shown by a chain line and the closed position A2 shown by a chain double-dot line.
and a rubber gasket 8 fixed to the partition wall 1 along the periphery of the opening 2. The packing 8 can also be provided on the inner surface of the panel body 4,
If necessary, it may be provided in both the opening 2 and the panel body 4.

The panel body 4 has an outer shell made of a metal plate material, and the inside thereof is filled with a heat insulating material, a sound insulating material, etc. as required. Roller brackets 10 are fixed to the upper left and right sides of the outer front surface of the panel body 4, and each bracket 10 supports a set of two rollers 5. In FIG. 3, each roller 5 is a plastic molded product having a roller groove 11 that fits around the rail 6, and is rotatably supported by a horizontal shaft 12 fixed to the bracket 10 via a bearing 13.

The roller groove 11 is loosely movable in the width direction with respect to the rail 6. The rolling groove 1 has a semicircular cross section and fits externally without any gaps.
1a, and front and rear flanks 11b and 11c that are continuous with the rolling groove 11a and slope outwardly. Of these, the flank surface 11b on the side of the bracket 10 is inclined more greatly than the flank surface 11c on the side of the partition wall 1. This is because when the movable rail 6B, which will be described later, tilts backward, as shown in FIG.
This is to avoid contact interference with the rail arm 17.

In FIG. 2, the rails 6 to be provided on the partition wall 1 side correspond to the two fixed rails 6A that account for most of the opening/closing stroke of the panel body 4, and the roller position when the panel body 4 is in the closed position A2. It consists of two movable rails 6B provided, and these are arranged in a straight line along the partition wall 1. However, each fixed rail 6A is fixed to the partition wall 1 with rail brackets 14 provided at regular intervals.

In FIGS. 3 and 4, the movable rail 6B
is a rail rod 15 whose length is approximately the same as the maximum width in the lateral direction of one set of rollers 5, and this rail rod 15.
A swing shaft 16 provided parallel to the two members 15,
16, and a rail arm 17 connecting the swing shaft 1
6 is pivotably supported at both ends by a support frame 8 fixed to the partition wall 1. The support frame 18 is composed of a base 18a having an L-shaped cross section and a projecting wall 18c (see FIG. 1) extending forward from the partition wall 1, and a pair of bearing frames 18b provided at the left and right ends of the base 18a. 16
is supported by the bearing frame 18b via a bearing 19.

The movable rail 6B is connected to the rail rod 1 as shown in FIG.
5 is continuous with the fixed rail 6A and allows the panel body 4 to open and close in the left and right directions (forward tilted posture), and as shown in FIG. It is possible to swing between the closed position and the closed position. In order to abut and restrict this swing limit, a pair of stoppers 20, 2 are placed between the front and back of the swing shaft 16.
1 were provided on the left and right sides of the base 18a.

That is, in FIG.
1, the stopper 20 on the roller bracket 10 side
The movable rail 6B is brought into contact with the partition wall 1 so as to be tilted forward by an angle α from the vertical plane. Also,
The stopper 21 on the side of the partition wall 1 contacts and restricts the movable rail 6B to a posture in which it is tilted backward by an angle β from the vertical plane toward the side of the partition wall 1. The angle α is an angle at which the movable rail 6B is tilted forward in a nearly vertical position, specifically, 10
It was a degree. Similarly, the angle β is preferably selected in the range of 15 degrees to 60 degrees, and in the example was set to 37 degrees. In order to prevent the rollers 5 from coming off the rail rods 15 when the panel body 4 is moved from the closed position A3 to the closed position A2, the projecting wall 18c of the support frame 18 is used as a regulating body. Specifically, as shown in FIG. 1, the vertical distance E between the panel body 4 and the projecting wall 18c is set to be smaller than the groove depth D of the roller 5, and when the panel body 4 is lifted excessively, its upper surface is Receive it on the lower surface of the projecting wall 18c,
The roller groove 11 is prevented from slipping out from the rail rod 15.

In FIG. 2, reference numeral 23 denotes a handle for opening/closing operations provided on the outer front surface of the panel body 4.

The air sealing device 3 configured as described above opens and closes the opening 2 by moving the panel body 4 in the left and right lateral directions along the rail 6. In FIG. 2, when the panel body 4 is moved in the direction of arrow C (leftward), it comes to the closed position A2, and when it is moved in the direction of arrow D (rightward), it comes to the open position A1. During this opening/closing operation, the roller 5 on the closed end side is connected to the fixed rails 6A, 6A.
It is necessary to move by passing over the right movable rail 6B sandwiched between It is received and supported by the stopper 20, and even if the load of the panel body 4 acts on the movable rail 6B via the rollers 5, this load only generates a moment that continues to maintain the traveling guide posture. Therefore, the rollers 5 can pass over the movable rail 6B without any trouble.

As shown by the two-dot chain line in Fig. 2, the closed position A2
, the panel body 4 directly faces the opening 2, and the left and right rollers 5, 5 are respectively movable rails 6B,
It is climbing on top of 6B. Even in this state, the movable rail 6B continues to maintain the traveling guide posture as described above, and remains in the closed position A2 unless the user performs a closing operation such as pressing the panel body 4 toward the bulkhead 1 side. do. When the panel body 4 is operated from this state to swing the movable rail 6B toward the partition wall 1, the panel body 4 gradually moves backward from the running surface defined by the rail 6, and the center of the rail rod 15 At the same time as it moves rearward from the center of the swing shaft 16, it rapidly moves to the closing position A3 in FIG. Although not shown, in order to bring the lower edge side of the panel body 4 into close contact with the gasket 8, the lower edge of the panel body 4 that has moved to the closed position A2 is guided into the lower end of the opening 2, and its inner surface is brought into close contact with the gasket 8. Have a guide to help you.

When opening the panel body 4 from the closed position A3 to the closed position A2, the panel body 4
to swing the movable rail 6B forward and stand it up. At this time, since the movable rail 6B swings and changes its posture, the operating force does not necessarily have to strictly match the direction of movement of the movable rail 6B, and the opening operation can be easily performed. Furthermore, since the panel body 4 is moved by a partial rotation operation with less operational resistance, the panel body 4 can be pulled back to the running surface with a smaller operating force than in conventional devices.

Furthermore, since the panel body 4 can be easily opened by pushing it from the inside, for example, when the present invention is applied to the opening 2 which is the entrance/exit of a refrigerator, it is possible to prevent people from being trapped inside the refrigerator. It is also advantageous in terms of prevention.

[Another embodiment example]

The air sealing device 3 of the present invention may be provided on the inner surface side of the opening 2 including the panel body 4.

A plurality of panel bodies 4 may be supported by rails 6, and in this case, movable rails 6 are provided according to the number of rollers 5 on the panel body 4.

If a transport vehicle etc. enters or exits through opening 2, open opening 2.
It is necessary to align the lower edge of the panel body with the floor surface, but in this case, an elastic packing 8 can be provided at the lower end of the panel body 4 to ensure easy passage of the transport vehicle.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional side view of the main parts showing the rail structure.
2 is a front view of the air sealing device, FIG. 3 is a vertical side view showing the state of the rail during running, and FIG. 4 is a sectional view taken along the line B--B in FIG. 3. 1... Partition wall, 2... Opening, 3... Air sealing device, 4... Panel body, 5... Roller, 6... Rail, 6A... Fixed rail, 6B... Movable rail,
A1...open position, A2...closed position, A3...
Blockade position.

Claims (1)

[Claims] 1. A rail 6 provided in the partition wall 1 and a panel body 4 that opens and closes the opening 2 provided in the partition wall 1 along the rail 6.
A pair of rollers 5 are pivotally supported by roller brackets 10 fixed to both sides of the upper part of the panel body 4, and a gasket 8 is attached to the periphery of the opening 2 or to the panel body 4, and the rail 6 is attached to the rollers 5. This is an open air-tight sealing device consisting of a fixed rail 6A that occupies most of the running area of the panel, and a movable rail 6B that swings the panel body 4 back and forth between the closed position A2 and the closed position A3 at the closed position A2. The movable rail 6B has a swing shaft 16 and a swing shaft 1.
Rail arm 17 fixed to the top surface of 6 and rail arm 1
A support frame 18 has a rail rod 15 fixed to the upper end of the support frame 18, and both ends of its swing shaft 16 are fixed to the partition wall 1.
The support frame 18 has a stopper 20 that receives the movable rail 6B in a nearly vertical forward tilted position, and a rearward tilted position in which the movable rail 6B is tilted toward the bulkhead 1 side. and a projecting wall 18c projecting forward of the partition wall 1 along the upper end surface of the panel body 4.
5. Free movement in the width direction: A rolling groove 11a that fits externally with no gap, and front and rear flanks 11b and 11c that are continuous with the rolling groove 11a and slope outward in a V-shaped cross section. An air-tight sealing device for an opening, in which the vertical distance E between the panel body 4 and the projecting wall 18c is set to be smaller than the groove depth D of the roller 5 at the closed position A3.