JP3327221B2 - Closing operation delay device for self-closing sliding door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closing operation delay device for a self-closing sliding door, and more particularly, to a closing operation delay device for delaying the closing operation of a self-closing sliding door having a structure of automatically closing after being opened. About.

[0002]

2. Description of the Related Art Conventionally, various types of self-closing sliding doors having a structure in which a closing operation is automatically performed after being opened have been provided.
In particular, it is widely installed in hospitals and various types of laying. This type of self-closing type sliding door has a structure in which the sliding door is constantly biased in a closing direction. As the biasing means, an elastic force of a spring or a coil spring is used, and the sliding door is connected to the sliding door by a wire and a pulley. What pulls the sliding door with the weight of the weight, the rail that opens and closes the sliding door is tilted by lowering the closing direction side,
One that runs with its own weight of a sliding door is exemplified.

The self-closing sliding door automatically closes after being opened, so that there is no need for a closing operation after a person has passed, and there is an advantage that the sliding door is not forgotten to be closed. However, since the closing operation starts immediately after opening, when the passage time is long, such as when an elderly person or a handicapped person or a wheelchair or a moving bed passes, the sliding door may be moved during the passage. Or, it may collide with the moving bed, and in order to avoid the collision, it is necessary to stop the sliding door which is being closed or to open the sliding door again.

Accordingly, as a device for delaying the sliding door by a predetermined time after the sliding door is opened and before the closing operation is started, an apparatus disclosed in Japanese Utility Model Laid-Open Publication No.
Japanese Patent No. 6579 discloses a temporary stop device for a self-closing door body. This device is a temporary stop device that maintains the open position of the door when the door is opened beyond the pass width of a person. Specifically, a self-holding circuit is configured with a contact type limit switch, a relay and a b contact type timer, and when the door is opened for a certain width or more, the limit switch is activated and the self-holding circuit is held. When the timer starts counting, the solenoid is energized at the same time, the solenoid is driven to temporarily stop the door closing operation, and after a lapse of a predetermined time, the b contact switch of the timer constituting the self-holding circuit is turned off. The self-holding circuit is in the non-holding state, the power to the timer and the solenoid is cut off, and the closing operation of the door starts.

[0005]

However, the apparatus described in the above-mentioned publication has a complicated structure, requires electric equipment, requires maintenance, increases costs, and requires a door. The limit switch is activated when the door is opened beyond the passing width of the person, and the timer starts counting.Therefore, after the limit switch is activated, the timer counts even when the door is opened more widely, and the opening operation is performed. If it is slow, a predetermined time elapses immediately after opening or immediately before opening, and the door immediately starts closing operation. To avoid this inconvenience, if the limit switch is positioned so that it operates when the door is opened sufficiently wide, on the contrary, the limit switch does not operate when the door is opened to the minimum that allows people to pass, that is, the closing operation starts immediately You will not be able to achieve your goals.

[0006] In view of the above situation, the present invention seeks to solve the above problem. In a self-closing sliding door having a structure in which the sliding door is automatically closed after being opened, the sliding door is opened to an arbitrary position, and then the sliding door is closed. The present invention is to provide a closing operation delay device that can delay the closing operation only immediately after the start of the operation, and can secure time for a person, a wheelchair, or a moving bed to pass.

[0007]

According to the present invention, there is provided a self-closing sliding door which is movable along a rail and is automatically closed after being opened. At the appropriate position of the sliding door, a one-way rotary damper is mounted with the rotating shaft orthogonal to the guide direction of the rail, and an eccentric cam is fixed to the rotating shaft of the rotating damper, and a part of the eccentric cam is brought into frictional contact with the rail. To form a circular arc portion that can be rolled, so that the rotation direction of the eccentric cam when the sliding door moves in the closing direction matches the braking direction of the rotary damper, and the arc portion of the eccentric cam immediately after the sliding door closing operation starts is a rail. A closing operation delay device for a self-closing sliding door is configured such that the rotation damper is braked only when the rolling door is in contact with the vehicle and rolling.

Here, it is preferable that the rotation axis of the rotary damper is set higher than the upper surface of the rail, and the center of gravity of the eccentric cam is set closer to the arc than the center of rotation. Further, the rail is an inclined rail whose closing direction side is lowered, and a sliding door that automatically performs a closing operation by its own weight is adopted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 shows a self-closing sliding door showing a typical application example of the present invention, and FIGS. 2 to 4 show specific embodiments of the present invention.

The self-closing sliding door 1 is mounted on an inclined rail 3 provided in the upper panel 2 of the passage, the side of which closes in a downward direction.
Is supported in a suspended state by a support 4 attached to an upper part of the vehicle, and is closed in a state where a door stop cushion 6 is in contact with a side surface of a column 5 or the like on a closed end side. As it rises, it is accommodated in a door pocket panel 7 provided on the side of the passage. In addition, the sliding door 1 is braked from just before the closing of the sliding door 1 to the closing thereof, and
A cylinder-type linear damper 8 is fixed along the inclined rail 3 so that the door-stop cushion 6 does not strongly collide with the side surface of the door and the like, and an abutting portion 9 protruding from the support 4 hits the linear damper 8. Like that. In the figure, F
Indicates a floor surface.

In the present invention, a one-way rotary damper 10 is mounted at an appropriate position of the sliding door 1 close to the inclined rail 3 so that the rotary shaft 11 is orthogonal to the guide direction of the rail 3 and the rotary damper 10 The eccentric cam 12 is fixed to the rotating shaft 11 of the above, and an arc portion 13 which can roll by frictionally contacting the inclined rail 3 is formed on a part of the eccentric cam 12,
The rotation direction of the eccentric cam 12 when the sliding door 1 moves in the closing direction is made to match the braking direction of the rotary damper 10. Thereby, the rotary damper 10 is braked only when the arc portion 13 of the eccentric cam 12 is in contact with the inclined rail 3 and rolling immediately after the closing operation of the sliding door 1 is started, that is, the sliding door 1 performs the closing operation. The closing operation is delayed only immediately after the start, so that time for a person, a wheelchair, or a moving bed to pass is secured.

More specifically, the inclined rail 3 has a structure in which a moving body 15 can be linearly moved via a bearing assembly 16 inside a fixed rail 14 having a substantially U-shaped cross section. The fixed rail 14 is fixed to a fixed plate 17 hanging down in the upper panel 2, the support 4 is fixed to the moving body 15, and the sliding door 1 is guided along the inclined rail 3.

The support 4 has a receiving plate 19 formed at a right angle to the lower end of a vertical plate 18 for fixing the moving body 15 toward the rear, and an opening 20 at the lower end of both ends of the vertical plate 18. And the receiving plate 1 so as to be continuous with the opening 20.
A locking hole 21 having a U-shape in plan view is formed near the bent edge of No. 9. Then, the heads 23, 23 of the bolts 22, 22 screwed to both sides of the upper surface of the sliding door 1 are respectively inserted into the openings 20 from the front, and the bolts 22 are positioned in the locking holes 21; To the receiving plate 19. Further, the vertical piece 25 of the fixing member 24 having an L-shaped cross section is screwed to the vertical plate 18 of the support 4 so as to cover the opening 20, and a U-shaped stopper formed on the horizontal piece 26 of the fixing member 24 when viewed from above. The bolt 22 is received and held in the hole 27. That is, by rotating the bolt 22, the sliding door 1
Height can be adjusted.

Here, since the inclined rail 3 is literally inclined and the sliding door 1 is set horizontally, the support 4 is fixed to the moving body 15 of the inclined rail 3 in a horizontal state, and the support 4 is fixed. Or the support 4 is fixed parallel to the moving body 15 of the inclined rail 3 and the sliding door 1 is inclined with respect to the support 4 and suspended.

The unidirectional rotary damper 10 used in the present invention has a low resistance when the rotary shaft 11 is rotated clockwise, for example, and has a large resistance when rotated counterclockwise. It has a structure, and a known commercially available product is used. Since the eccentric cam 12 is required to have a large frictional resistance with the inclined rail 3,
In the present embodiment, the core is made of a hard synthetic resin or metal at the center of rotation so that it can be fixed to the D-cut portion 11A of the rotary damper 10 without idling. Is buried or insert molded. Alternatively, the eccentric cam 12 is made of hard synthetic resin or metal, and a belt made of rubber or soft synthetic resin is fixed only to the portion corresponding to the arc portion 13 or a gear is formed on the arc portion 13, and It is also possible to form a rack on the facing inclined rail 3.

The rotary damper 10 is screwed and fixed to a mounting plate 28 provided so as to protrude upward on the opening side of the vertical plate 18 of the support 4.
The rotation shaft 11 of 0 is set higher than the upper surface 29 of the fixed rail 14 constituting the inclined rail 3 and is mounted orthogonally to the guide direction (longitudinal direction) of the inclined rail 3. In the present embodiment, the eccentric cam 12 has a substantially sector shape when viewed from the front, and is fixed to the rotating shaft 11 of the rotary damper 10 with its main part as the center of rotation.
The center of gravity of 2 is set closer to the arc portion 13 than the rotation center. Thereby, the eccentric cam 12 can rotate the rotating shaft 11 relatively quickly at least clockwise by its own weight, and can also rotate counterclockwise slowly but slowly. Therefore, if the eccentric cam 12 is left standing in any rotating state, one of the two end portions of the circular arc portion 13 naturally comes into contact with the upper surface 29 of the inclined rail 3. Becomes

In this embodiment, the rotary shaft 11 of the rotary damper 10 is set toward the rear side in FIG. 1 so that the resistance is small when the rotary shaft 11 rotates clockwise, and conversely when the rotary shaft 11 rotates counterclockwise. , The arc portion 13 of the eccentric cam 12 comes into contact with the upper surface 29 of the inclined rail 3 from above. FIG. 4 shows the eccentric cam 1
2 is viewed from the back side, and the opening and closing operation of the sliding door 1 according to the present invention will be described based on this drawing.

First, FIG. 4A shows a state in which the sliding door 1 is moved from the closed state immediately after the opening operation is started, from the left side to the right side in the drawing in a frame-by-frame manner. In the closed state, the eccentric cam 12 is always in the initial state at the left end. Then, when the sliding door 1 starts to be opened, the arc portion 13 of the eccentric cam 12 rolls from one end portion A while frictionally contacting the upper surface 29 of the inclined rail 3, and rotates the rotating shaft 11 of the rotary damper 10 clockwise, The rolling of the eccentric cam 12 stops at the other end portion B of the arc portion 13, and thereafter, the other end portion B of the arc portion 13 slides on the upper surface 29 of the inclined rail 3 with the opening operation of the sliding door 1. Become like Then, after the sliding door 1 is opened to an arbitrary position, the hand is released from the sliding door 1 (see FIG. 4B).

FIG. 4 (b) shows the sliding door 1 immediately after the closing operation is started from an arbitrary open state in a frame-by-frame manner from right to left in the drawing. Regardless of the open state of the sliding door 1, the other end B of the eccentric cam 12 is always in contact with the upper surface 29 of the inclined rail 3. Then, the sliding door 1 starts to move in the closing direction along the inclination of the inclined rail 3, but the eccentric cam 1 moves with the movement in the closing direction.
2 is the upper end 2 of the inclined rail 3 from the other end B.
The sliding door 1 is rolled while being in frictional contact, and the rotating shaft 11 of the rotary damper 10 is rotated counterclockwise, so that the closing operation of the sliding door 1 is braked and closed slowly. Then, at the other end portion A of the arc portion 13, the rolling of the eccentric cam 12 stops, and thereafter, the other end portion A of the arc portion 13 slides on the upper surface 29 of the inclined rail 3 with the closing operation of the sliding door 1. It works. In other words, the eccentric cam 12 makes a completely opposite movement between the opening operation and the closing operation of the sliding door 1, and this operation is repeated at the time of opening and closing.

As described above, the present invention provides the rotary damper 1 only when the arc portion 13 of the eccentric cam 12 is in contact with the upper surface 29 of the inclined rail 3 and is rolling immediately after the closing operation of the sliding door 1 is started.
In this case, the closing operation of the sliding door 1 is delayed by applying the braking of zero.
It can be adjusted by changing the rotational resistance of the eccentric cam 12 and the diameter and circumference of the arc portion 13 of the eccentric cam 12.

It is also possible to set the rotating shaft 11 of the rotary damper 10 lower than the lower surface of the inclined rail 3 so that the arc portion 13 of the eccentric cam 12 contacts the lower surface from below. In this case, it is necessary to set the center of gravity on the side opposite to the arc portion 13 with respect to the center of rotation so that the arc portion 13 of the eccentric cam 12 always faces upward.

[0022]

According to the closing operation delay device for a self-closing sliding door of the present invention as described above, in the self-closing sliding door having a structure that can be moved along a rail and automatically closes after being opened. At a suitable place of the sliding door close to the, a one-way rotary damper is mounted with the rotating shaft orthogonal to the guide direction by the rail, and an eccentric cam is fixed to the rotating shaft of the rotary damper, and the rail is partially attached to the eccentric cam. To form an arc portion that can roll by frictional contact with the eccentric cam when the sliding door moves in the closing direction so that the rotation direction of the eccentric cam matches the braking direction of the rotary damper. Only when the sliding door starts to close after opening the sliding door to an arbitrary position because the braking of the rotary damper works only when the part contacts the rail and rolls Delays the closing operation of the vehicle, so that time for a person, a wheelchair, or a moving bed to pass can be secured, and the structure is simple, and no electrical equipment is required, maintenance is unnecessary, and cost is reduced. Reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall simplified front view of a sliding door to which the present invention is applied and its surroundings.

FIG. 2 is an exploded perspective view showing a main part of the present invention.

FIG. 3 is a longitudinal sectional view of a main part in an assembled state.

FIG. 4 is an explanatory diagram for explaining the operation of the present invention;
(a) shows the relation between the rail and the eccentric cam immediately after the opening operation of the sliding door,
(b) shows the relationship between the rail and the eccentric cam immediately after the closing operation of the sliding door in a frame-by-frame manner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sliding door 2 Upper panel 3 Inclined rail 4 Support body 5 Post 6 Cushion per door 7 Door pocket panel 8 Linear damper 9 Retaining portion 10 Rotary damper 11 Rotary shaft 12 Eccentric cam 13 Arc section 14 Fixed rail 15 Moving body 16 Bearing assembly 17 Fixed Plate 18 Vertical plate 19 Receiving plate 20 Opening 21 Locking hole 22 Bolt 23 Head 24 Fixing member 25 Vertical piece 26 Horizontal piece 27 Stop hole 28 Mounting plate 29 Upper surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-11-200701 (JP, A) JP-A-8-296363 (JP, A) JP-A-10-169302 (JP, A) 47084 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E05F 1/00 E05F 3/00 E05F 5/00

Claims (3)

(57) [Claims] 1. A self-closing sliding door which is movable along a rail and automatically closes after being opened, wherein a rotating shaft is provided at an appropriate position on the sliding door close to the rail so as to be orthogonal to a guide direction of the rail. Attaching a one-way rotary damper, fixing an eccentric cam to the rotation shaft of the rotary damper, forming an arc portion that can roll by frictionally contacting the rail on a part of the eccentric cam, and closing the sliding door. The direction of rotation of the eccentric cam when moving to the same direction as the braking direction of the rotary damper, and the braking of the rotary damper works only when the arc portion of the eccentric cam contacts the rail and rolls immediately after the closing operation of the sliding door starts A closing operation delay device for a self-closing sliding door, characterized in that: 2. A rotary shaft of the rotary damper is set higher than an upper surface of the rail, and a center of gravity of the eccentric cam is set closer to an arc than a center of rotation.
A closing operation delay device for a self-closing sliding door as described in the above. 3. The closing operation delay device for a self-closing sliding door according to claim 1, wherein the rail is an inclined rail whose closing direction side is lowered, and the sliding door automatically performs a closing operation by its own weight.