JPS583117B2 - automatic door closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention consists of two pulleys 2, 2 disposed at both ends of the lintel 1, with an annular wire 3 bridged between the pulleys 2, 2, and 2 pulleys 2 disposed below the lintel 1 so as to be slidable in a sliding manner. A mainspring spring device 5 that accumulates spring force when the door 4 is opened and closes the door 4 with the accumulated spring force, and a damper device 6 that operates as a resistance only when the door 4 is closed are attached to the wire 3. 3, and this damper device 6 is connected to a cylinder 7, a piston 8 slidably disposed in the cylinder 7, and the piston 8 slides without resistance when the door is opened, and slides with resistance when the door is closed. It is formed by a packing 9 attached to the piston 8 for movement, and a tubular piston shaft 10 to which the piston 8 is attached and can be freely moved in and out from the end of the cylinder 7. A pusher 11 is attached to the end of the piston shaft 10, and the first locking piece 12 and the piston shaft 10 are slidable within the piston shaft 10 and can be locked to the pusher 11 when the door is closed.
The present invention relates to an automatic door-closing device characterized in that the wire 3 is provided with a second locking piece 13 that is located outside and can be locked to the pusher 11 when the door is opened.

An object of the present invention is to provide an automatic door-closing device that can automatically close any of a pair of doors when opened.

The present invention will be explained in detail below with reference to Examples.

1 is a lintel with a rail groove 1 provided in the longitudinal direction at the bottom.
The upper ends of a pair of left and right doors 4, such as shoji screens, are slidably fitted into the upper ends of the doors 5.

Pulleys 2, 2 are rotatably attached to both ends of the lintel 1, respectively, and a wire 3 is looped between the pulleys 2, 2, and both ends of the wire 3 are connected to a connecting fitting 16. be.

One end of the wire 3 is connected to a connecting fitting 16 via a spring 17 to keep the tension of the wire 3 constant.

An engagement piece 18 is slidably attached to a suitable position on the wire 3, and the engagement piece 18 is attached to a fixed portion 22 attached to the wire 3 via a buffer spring 23.

An engagement hole 21 is bored in the upper end of the vertical frame 20 at the intersection of the upper frame 19 and the vertical frame 20 of the pair of doors 4, and an engagement piece 18 is inserted into the engagement hole 21 of each door 4. has been inserted.

Furthermore, inside the lintel 1, there are provided a mainspring spring device 5 that accumulates spring force when opening the door 4 and closes the door 4 with the accumulated spring force, and a damper device 6 that operates as a resistance only when the door 4 is closed. .

The mainspring spring device 5 has a drum 23 attached to a U-shaped fixture 22.
is rotatably attached to the drum 23, and a mainspring spring is installed inside the drum 23.
A cable 24 such as a steel tape fixed to the cable 3 is wound around the cable 24, and the other end of the cable 24 is fixed to the connecting fitting 16.

The damper device 6 is configured such that a piston 8 is housed inside a cylinder 7 such as an air cylinder, and a cylindrical piston shaft 10 fixed to the piston 8 projects from an end of the cylinder 7.

When the door is opened, fluid such as air in the cylinder 7 passes through the outer periphery of the piston 8 without resistance and the piston 8 slides, and when the door is closed, the fluid in the cylinder 7 passes through with resistance and the piston 8
A packing 9 that slides is attached.

If the direction of the packing 9 is reversed, the direction in which the damper operates will be reversed.

A wire 3 is inserted into the piston shaft 10, and a pusher 11 is attached to one end of the piston shaft 10.

A first locking piece 12 is attached to the inside of the piston shaft 10 of the wire 3, and a second locking piece 13 is attached to the outside of the piston shaft 10 of the wire 3.

Furthermore, in the figure, 24 is a slit through which the engagement piece 18 slides, and 25 is a pressure regulating valve.

Further, the automatic door closing device configured as described above is incorporated into an entrance sliding door unit A as shown in FIGS. .

Next, the operation of the automatic door closing device of the present invention constructed as described above will be explained.

When the door 4 on the right side is opened to the left, the engagement piece 18 engages the buffer spring 2.
3 to move the wire 3 clockwise.

Then, the connecting fitting 16 also moves, tightening the spring spring device 5 and extending the cable 24.

On the other hand, the first locking piece 12 fixed to the wire 3, the second locking piece 1
3 moves to the right in FIG. 3, the push 11 is pushed by the second locking piece 13, and the piston shaft 10 enters into the cylinder 7, as shown in FIG. 3a.

At this time, fluid such as air flows between the piston 8 and the packing 9 without resistance, and the piston 8 moves to the right.

When the hand opening the door 4 is released, the connecting fitting 16 and the wire 3 move in the opposite direction due to the force of the main spring of the main spring device 5.

Then, when the first locking piece 12 hits the pusher 11, the piston shaft 10 starts to move, and the damper action of the damper device 5 starts to work, controlling the speed and closing the door 4.

That is, resistance is generated between the piston 8 and the packing 9, and the piston 8 moves to the left in FIG. 3, and the piston shaft 10 shown in FIGS. 3b and 3c comes out.

As described above, the present invention spans a wire in a ring between the pulleys arranged inside the lintel, and also attaches two doors slidably arranged below the lintel to the wires, respectively. Since it has a spring spring device that accumulates spring force when opening and closes the door using the accumulated spring force, no matter which of the two doors is opened, the door will automatically open using the spring force accumulated in the spring spring device. The damper device has a simple structure that allows the door to be closed automatically by simply running a wire over it and installing a mainspring spring device, and the damper device operates only when the door is closed. Therefore, when either of the two doors closes, it is resisted by the damper device, and even if it closes automatically, it closes slowly.

In addition, a damper device is installed in a cylinder, a piston that is slidably disposed within the cylinder, a packing that is attached to the piston so that the piston slides without resistance when the door is closed, and also slides with resistance when the door is closed, and It is formed by a tubular piston shaft that can be attached and moved in and out from the end of the cylinder, and a wire is inserted into the piston shaft, so the force can be applied on the same axis and there is no bending moment etc. on the piston shaft of the damper. It moves smoothly without applying any force, and can absorb the difference when the stroke of the wire is longer than the stroke of the damper.Moreover, it is equipped with a pusher at the end of the piston shaft, and can slide freely within the piston shaft. In addition, the wire is provided with a first locking piece that can be locked when the door is pushed when the door is closed, and a second locking piece that is located outside the piston axis and can be locked when the door is pushed when the door is opened. The second locking piece pushes the piston shaft into the cylinder, and when the door is closed, the first locking piece pushes the piston shaft to receive a damper action, and the first locking piece and the second locking piece By arbitrarily selecting the position of the damper, the operating stroke of the damper can be set arbitrarily, and the damper does not work when the distance to open the door is small, so the shoji closes well.

[Brief explanation of drawings]

Figures 1a and b are a front view and side sectional view showing one embodiment of the present invention, Figure 2 is a partially omitted perspective view of the same as the above, and Figure 3a is the damper device in the state when the door is opened. Cross-sectional view, Figure 3 b, c
is a partially omitted sectional view of FIG. 3a when the door is closed, in which 1 is a lintel, 2 is a pulley, 3 is a wire, 4 is a door, 5 is a mainspring spring device, 6 is a damper device, 7 is a cylinder, 8 is a piston, 9 is a packing, 10 is a piston shaft, 11 is a pusher, 12 is a first locking piece, and 13 is a second locking piece.

Claims (1)

[Claims] 1. A wire is strung in a ring between pulleys placed at both ends of the lintel, and two sliding doors placed below the lintel are each attached to the wire, and a spring force is applied when the door is opened. A mainspring spring device that accumulates and closes the door using the accumulated spring force, and a damper device that operates as a resistance only when closing are attached to the wire, and this damper device is attached to the cylinder and slidably inside the cylinder. A piston, a packing attached to the piston so that the piston slides without resistance when the door is opened and slides with resistance when the door is closed, and a tubular piston shaft to which the piston is attached and which can be freely moved in and out from the end of the cylinder. A first locking piece is formed by inserting a wire into the piston shaft and attaching a bush to the end of the piston shaft so that the first locking piece can slide freely within the piston shaft and can be locked when pushed when the door is closed; and the piston. An automatic door-closing device characterized in that the wire is provided with a second locking piece that is located off-axis and can be locked when pushed when the door is opened.