JPH0314986B2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a balancing door.

``Conventional technology'' When opening a general door that separates a space with a difference in air pressure, such as an air dome, the width of the door is 20 to 60 mm.
Since the door is pressurized with a force of 40 to 120 kgf at Aq, opening and closing the door is extremely difficult and dangerous. If a device with a force to balance the pressure applied by the door is attached, the mechanism for detecting the pressure and transmitting the necessary force to the door would be complicated and expensive. The following so-called balancing doors are suitable for such uses.

What is shown in the front and plan views of FIGS.
(i) Since the axis of rotation is located at the center of the surface on which pressure is applied, no eccentric force acts.

(ii) Since the rotation axis is fixed, the horizontal direction caused by the wind flow during opening is fixed and does not affect the movement of the door.

(iii) According to (i) and (ii) above, the door can be closed with a small door closer regardless of the amount of pressure applied.

It has the following characteristics.

In addition, in the case shown in the front and plan views of FIGS. 3a and 3b, rotating shafts 4 and 4' that move to the center of the door 3 or a position at a ratio of 0.43:0.57 of the door width are provided at the top and bottom, and a shaft 6 is also provided. Arms 5 and 5' are connected vertically through the door 3, and as the arms 5 and 5' rotate in accordance with the opening angle of the door 3, the door 3 moves toward the shaft 6 while opening. The closing force is generated by a built-in spring in the shaft 6. (i) When the door is closed, eccentric force does not act because the rotating shaft is located at the center of the surface on which the pressing force is applied.

(ii) Both opening force and closing force are constant regardless of the opening angle.

It has the following characteristics.

In the figure, A indicates the opening width, and B indicates the effective opening width.

"Problems to be Solved by the Invention" However, the above-mentioned conventional methods have the following drawbacks.

(i) The one shown in Figure 2 is disadvantageous because the effective opening width is small.

(ii) In the case of the one shown in Figure 3, the pressure applied to the door is received by both parts of the side sliding wheel provided approximately in the center of the door width, and the pressure is balanced against the pressure. As the door opens, the balance collapses. To compensate for this, a torsion spring that also serves as a self-closing force is used, but the pressure on the positive pressure side is not constant, and the pressure in front and behind the door changes when the door opens. Therefore, it cannot follow large pressure differences. As a result, during opening, the horizontal force due to the wind flow on the door surface acts on the moving axis, and when opening toward the outside, if the pressure is greater than the adjusted closing force, the door will be fanned, and will not close or be small. Heavy when opening.

Moreover, since the door moves in parallel between the upper frame and the lower frame, it is difficult to completely air seal the top and bottom of the frame and the door.

In addition, for fire doors, ``the frame of the fire door or the part that contacts the fire door shall be constructed in the same way, or by providing a ruler edge or a door stop, etc., so that no gaps will be created when closed, and the fire door shall be installed. Hardware must be installed in such a way that it will not be exposed when the installation is closed, as stipulated in Article 110, Paragraph 4 of the Building Standards Act, and therefore cannot be used.

"Means for Solving the Problems" and "Operations" The present invention was made in view of the above circumstances, and its gist is that the double door rotates to the vertical frame position at both ends in the same way as a general double door. The frontage door is constructed with a shaft, and among the above doors, the doors that rotate in opposite directions are designed to have the same door width, and a wing-shaped bracket is attached to the upper part of the rotation shaft, and a wing-shaped bracket is attached between the brackets. Assuming that the installed parallel bars are pivotally fixed with the axis in between, and a large effective opening width is ensured, the eccentric force caused by the pressing force can be offset between the doors rotating in opposite directions, and the applied The key point is that the door can be opened and closed without any hindrance due to high or low pressure.

"Example" This will be explained in detail below based on the drawings.

Figures 1a and 1b are a front view and a plan view for explaining the door of the present invention, and A and B in the figure are paired doors, which have rotating shafts 7 at the vertical frame positions at both ends, similar to a general double door. , which constitutes the frontage door.

In the illustrated example, door A opens inward, and door B opens outward.

On the other hand, in the case of FIG. 4, which shows one embodiment of the present invention, it is applied to two adjacent frontages 8 and 9, and the paired doors 8 and 8 constituting each frontage door are
a, 8b and 9a, 9b open outward and inward,
This is a case where the frontage is dedicated to the exit and the frontage is dedicated to the entrance.

Among the above doors, the doors that rotate in opposite directions, that is, A and B in Figure 1, and the fourth
In the figure, doors 8b and 9b, and doors 8a and 9a are designed to have the same door width in order to equalize the pressing force.

A wing-like bracket 10 is attached to the upper part of the rotating shaft 7.

Parallel bars 11, 11 are pivotally fixed 12 between the brackets of the door, which are rotated in opposite directions as described above, with the axis sandwiched therebetween.

However, when looking at doors connected by parallel bars 11, 11, the pressing force is applied to opposite exit doors,
Equally received by the entrance door, and parallel bars 11, 11
Because they cancel each other out via the
In addition, the closer can also be made smaller.

Incidentally, since the widths of the connected doors are equal, there is no inconvenience that eccentric force is generated due to pressurizing force.

Furthermore, since the rotation axis is fixed, even if a horizontal force is generated due to the wind flow during opening, the movement of the door will not be affected.

Furthermore, since the rotating shafts are arranged at the positions of the vertical frames at both ends, a large effective opening width can be ensured.

``Effects of the Invention'' As described above, according to the present invention, a large effective opening width can be ensured, and the door can be opened and closed without any problem depending on the pressure force, and the following advantages can also be achieved. have

(i) The door cross section can be made in the same way as general AT doors and fire doors.

(ii) Door B can be used as a self-closing door by attaching a general door closer, etc.

[Brief explanation of the drawing]

1a, b and 4a, b are a front view and a plan view of the door of the present invention, FIGS. 2a, b, 3a,
b is a front view and a plan view of a conventional balancing door. 1...Door, 2, 2'...Fixed shaft, 3...Door, 4,
4'... Rotating shaft, 5, 5'... Arm, 6... Shaft, 7... Rotating shaft, 8, 9... Frontage, 8a, 8
b, 9a, 9b...pair door, 10...wing bracket, 11...parallel bar, 12...pivot stop.

Claims (1)

[Claims] 1. Paired doors are configured with rotation axes at both ends of the vertical frame in the same way as general double-hung doors, and the widths of the doors that rotate in opposite directions are designed to be equal. A balancing door characterized in that a wing-shaped bracket is attached to the upper part of the rotating shaft, and an erected parallel bar is pivotally fixed with the shaft center sandwiched between the brackets.