JP7624131B2 - Seal structure of rotating seal body of folding door - Google Patents

Description

The present invention relates to a folding door device in which the upper surface of the lower rail that constitutes the frame on which the folding door is attached is formed as a flat surface, and to the sealing structure of a rotating seal body that seals the gap between the lower rail and the folding door.

Folding doors, which are made up of multiple connected doors, are widely used as devices for opening and closing entrances. Incidentally, a hoist is attached to the upper end of the door joint of a folding door, which does not protrude from the rail during folding operation, and is suspended from the rail of the upper rail, and a slider protrudes from the lower end and can move along a guide groove provided in the lower rail. When extended and closed, a locking bar protrudes and fits into the guide groove, locking the folding door so that it cannot be opened.

A seal body with sealing material installed is provided on the upper and lower rails of the frame body to which the folding door is attached, and the inner surface of the closed folding door can abut against the seal body, ensuring airtightness and watertightness via the seal material.
For this reason, the top surface of the bottom rail is not flat, and the above seal is provided on the inside (inside the room) so that the folding door can abut against it. This has traditionally been adopted as a necessary form to maintain airtightness and watertightness between the folding door and the bottom rail.

Incidentally, in recent years, flat floors that allow wheelchairs to move freely without steps on the floor surface, known as barrier-free, have become popular. For example, if the floor surface of a room and the balcony surface are the same, a wheelchair can move freely onto the balcony. However, if the bottom rail is made flat, there is no seal, which results in problems such as rainwater entering from outside and a loss of airtightness against the outside air.

So, a rotating seal body is used so that the seal can be attached even on a flat floor surface, and when the folding door is folded, the rotating seal body falls down to create a flat floor surface. However, when the folding door is extended to close the opening and lock it, the rotating seal body rotates and stands up, abutting against the inner surface of the folding door to seal, ensuring airtightness and watertightness.

The "folding door device" disclosed in JP 2006-37424 A is a folding door device that can seal the gap between the folding door attached to a frame and the lower rail that forms a flat upper surface when the folding door is extended to close the opening.
Therefore, the upper surface of the lower rail is made flat and a groove space is provided continuously in the longitudinal direction, and a rotatably attached rotating seal body is accommodated in the groove space.When the locking bar attached to the folding door is lowered, the rotating seal body rotates and stands up in conjunction with the descent of the locking bar, so that it can abut against the bottom frame of the folding door.

Figure 5 shows the case where the rotating seal body (A) is attached to the lower rail (B). The lower rail (B) is provided with a shaft (C), and the rotating seal body (A) is supported on the shaft (C). In this figure, the rod (D) of the locking device is lowered, causing the rotating seal body (A) to rotate and stand up, and the seal (E) attached to the edge is abutting against the inner surface of the folding door (F).

The rotating seal body (A) has a pressing piece (G) and is horizontal so as to close the fitting groove (H) when the folding door (F) is folded and the frontage is open. However, when the rod (D) descends, the pressing piece (G) is pressed down as shown in the figure and the rotating seal body (A) stands up.
Therefore, the airtightness and watertightness of the folding door (F) is ensured via the rotating seal body (A).

However, there have been heavy rains recently, and during heavy rain such as a squall, rainwater enters the insertion groove (H) into which the rod (D) descends, and passes through the gap between the shaft (H) and the shaft hole of the rotating seal body (A), and seeps into the inside of the folding door (F).
Because the shaft (c) and the rotating seal body (a) are made from aluminum, there is a small gap (clearance) between the shaft hole of the rotating seal body (a) that can rotate, and water can penetrate into this gap.
"Folding door device" according to JP 2006-37424 A

Thus, the rotating seal member provided in the folding door device has the above-mentioned problems.
The problem that the present invention aims to solve is this problem, and provides a seal structure for a rotating seal body that is configured so that rainwater does not enter through a gap (clearance) formed in the shaft portion of the rotating seal body, even during heavy rain such as a squall.

The folding door device of the present invention is configured so that the lower rail is provided with a rotating seal body, which rotates and stands up to provide sealing. Therefore, the basic structure is the same as the "folding door device" in JP 2006-37424 A.
The present invention improves the sealing function of the rotating seal body of this folding door device, and is designed to prevent rainwater from entering the shaft portion.

Therefore, a water-stopping member is attached to the inner surface of the insertion groove into which the descending rod fits, and when the rod descends and the pressing piece of the rotating seal body hangs down, the pressing piece is configured to be able to abut against the water-stopping member.
Here, the specific material of the waterproofing member is not particularly limited, but a material having excellent adhesion to aluminum material is preferable.

In the folding door device of the present invention, the rotary seal body extends in the longitudinal direction, and the pressing piece also extends and fits into the fitting groove. The rod is provided at the location where the protruding joint is located, and when the rod descends, the pressing piece is pressed, rotates and hangs down, and can abut against the watertight member.
Therefore, the presser piece and the inner surface of the fitting groove are sealed via the watertight member, so that rainwater does not infiltrate into the shaft portion of the rotary seal body.

1 is an embodiment showing a seal structure of a rotating seal body according to the present invention. Specific examples of waterproofing components. 6 is a diagram showing another embodiment of the seal structure of a rotary seal body according to the present invention. Specific examples of waterproofing components. A rotating seal body attached to a folding door device.

Fig. 1 shows a cross-sectional view of a specific example of the seal structure of a rotary seal body according to the present invention. In the figure, 1 represents the rotary seal body, 2 the lower rail, 3 the folding door, 4 the rod, and 5 the water-stopping member. In the figure, the rod 4 descends and fits into the fitting groove 6, which causes the pressing piece 7 to rotate as it is pushed down by the rod 4, causing the rotary seal body 1 to stand up and one seal 8 attached to the edge to abut against the surface of the folding door 3.
The seal 9 attached to the other edge is provided on the lower rail 2 and abuts against the upper end of an accommodation groove 10 in which the rotary seal body 1 is accommodated when it falls over.

The waterproof member 5 is attached (fixed) to the inner surface of the fitting groove 6, and the tip of the pressing piece 7 pressed down by the rod 4 can abut against the waterproof member 5 without any gap.
Therefore, there is no gap between the pressure piece 7 and the inner surface of the insertion groove 6, and rainwater that accumulates in the insertion groove 6 during heavy rain will not pass through the gap (clearance) in the shaft portion and seep into the inside of the folding door 3.

2, the water-stopping member 5 is in the form of a long, thin strip, and is fixed, for example, by an adhesive to the inner surface of the fitting groove 6. When the rod 4 descends and fits into the fitting groove 6, the pressing piece 7 of the rotating seal body 1 rotates, and its tip abuts on the water-stopping member 5, leaving no gap therebetween.
The pressing piece 7 is made of aluminum, the same as the rotating seal body 1, and an elastic body such as rubber is suitable for allowing the aluminum pressing piece 7 to abut against the water-stopping member 5 without any gaps, although there is no limitation thereto.

Since the tip of the pressing piece 7 abuts against the waterproofing member 5 and there is no gap, even if rainwater accumulates in the fitting groove 6, the rainwater will not penetrate into the clearance formed in the shaft portion and pass through. In other words, rainwater cannot penetrate inside the folding door 3.
When heavy rain hits the upper surface of the lower rail 2 and the rainwater splashing around passes through a gap formed between the lower end of the folding door and the upper surface of the lower rail, the seal 8 attached to the edge of the rotating seal body 1 prevents the rainwater from entering inside the folding door.

FIG. 3 shows another embodiment of the seal structure of the rotary seal body according to the present invention.
The overall schematic structure is the same as the seal structure of the rotary seal body 1 shown in FIG. 1, and a watertight member 11 is attached to the inner surface of the fitting groove 6 into which the rod 4 is fitted.
A recess 12 is provided on the inner side of the fitting groove 6, and a protrusion 13 is provided on the water-stopping member 11, which is fitted into the recess 12 for attachment. When the rod 4 descends, the pressing piece 9 is pressed down and rotated, and the tip of the pressing piece 9 which has rotated and hangs down can abut against the water-stopping member 11, leaving no gap between them.

Figure 4 shows a specific example of the water-stopping member 11. A protrusion 13 is provided in the center of the back surface 14, and the protrusion 13 extends in the longitudinal direction. The protrusion 13 is fitted into a recess 12 formed on the inner surface of the fitting groove 6 and attached. The cross-sectional shape of the recess 12 has a narrow fitting opening, so that the protrusion 13 fitted into the recess 12 will not come off.

As such, the water-stopping members 5, 11 can take a variety of shapes, and although not limited to any particular shape, they are attached to the inner surface of the insertion groove 6. The insertion groove 6 extends along the entire width of the opening, and the rotating seal body 1 also extends across the entire width. The water-stopping members 5, 11 are attached to the inner surface of this insertion groove 6, and as the rods 4 positioned at various points are lowered, the pressing pieces 7, 9 are pushed down and rotated, coming into contact with the water-stopping members 5, 11.

REFERENCE SIGNS LIST 1 Rotating seal body 2 Lower rail 3 Folding door 4 Rod 5 Water-stopping member 6 Insertion groove 7 Pressing piece 8 Seal 9 Seal
10 Storage Groove
11. Water-stopping materials
12 Recess
13 Convex
14 Rear

Claims (3)

This sealing structure for a rotating seal body of a folding door device has a folding door attached to a frame body, the upper surface of the lower rail is flat and a storage groove is provided continuously in the longitudinal direction, a rotating seal body that is rotatably attached is stored in the storage groove, and when a locking rod is lowered, the rotating seal body rotates and stands up so that it can abut against the bottom frame of the folding door to seal.This sealing structure for a rotating seal body of a folding door is characterized in that a water-stopping member is attached to the inner surface of the insertion groove that fits into when the rod is lowered, and the tip of the pressing piece of the rotating seal body abuts against the water-stopping member. The seal structure of the rotating seal body of a folding door according to claim 1, in which the water-stopping member is in the shape of a long, thin strip. 2. The seal structure of a rotary seal body for a folding door according to claim 1, wherein the waterproofing member is in the form of an elongated strip having a convex portion on its back surface which fits into a concave portion on the inner surface of the fitting groove.

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