JP2001020596A - Sliding door delaying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding door delaying device capable of temporarily holding the open condition of the sliding door without using a hydraulic device. SOLUTION: A sliding door delaying device comprises a rack 1 extending in the direction of movement of the sliding door and a braking machine 2 having a pinion 9 selectively engageable with the rack 1. The braking machine 2 further comprises a step-up gear 6 connected to the pinion 9 through a one-way clutch 8 and an eddy current damper 17 connected to the output side of the step-up gear 6. The rack 1 is installed on one of the sliding door and a door frame and the braking machine 2 is installed on the other. Then, the installation positions of the pinion 9 and rack 1 are set so that they are engaged with each other near the start end of a moving stroke in closing direction from the time of opening of the sliding door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a delay device for a sliding door, and more particularly to a novel delay device using a so-called eddy current damper.

[0002] Here, the delay device of the sliding door is to make the speed of the sliding door driven in the closing direction by the closer extremely slow for a while from the opening of the sliding door to facilitate the passage of a wheelchair from, for example, a hospital room. A device.

[0003]

2. Description of the Related Art In a conventional sliding door delay device, a rack extending in a sliding door moving direction is fixed to, for example, a door frame, and a hydraulic device in which a spring is removed from a closer of a revolving door is mounted on the sliding door. The pinion of the device engages with the rack near the open position of the sliding door.

The sliding door delay device converts the movement of the sliding door, which moves in the closing direction by the closer, into the movement of a piston in a hydraulic system through the engagement between a rack and a pinion, and converts the movement of the piston in the hydraulic system. To reduce the closing speed of the sliding door.

[0005]

This sliding door delay device can obtain a large braking force because it uses a hydraulic device, but the structure must be complicated in order to prevent leakage of hydraulic oil. There are inconveniences.

In addition, since the orifice resistance of the hydraulic oil changes depending on the temperature, the opening of the orifice must be adjusted each time the season changes, and the maintenance management is troublesome.

Accordingly, an object of the present invention is to provide a novel sliding door delay device that does not use a hydraulic device, and to solve the above-mentioned disadvantages.

[0008]

To achieve the above object, the present invention provides a rack extending in a moving direction of a sliding door;
A brake having a pinion that can be selectively meshed with and engaged with the rack; the brake has a gearbox connected to the pinion via a one-way clutch, and an output side of the gearbox. It has a eddy current damper connected to it, and a rack is mounted on one of the sliding door and the door frame, and a brake is mounted on the other, and the pinion and the rack are bitten from the opening of the sliding door to the vicinity of the beginning of the moving stroke in the closing direction. It is characterized in that these mounting positions are set so as to match.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. In this embodiment, the present invention is applied to a so-called hanger sliding door that suspends a sliding door from a rail, and a sliding door closer (not shown) is mounted on the sliding door, and the sliding door is constantly urged in a closing direction. Shall be

In FIGS. 1 and 2, reference numeral 1 denotes a rack,
Reference numeral 2 denotes a brake, and in the illustrated embodiment, the rack 1
Is mounted on the indoor side of the rail 3 of the sliding door, and the brake 2 is mounted on an upper frame portion (not shown) of the sliding door via a mounting plate 4 having an L-shaped cross section (see FIG. 2).

As shown in FIGS. 1 and 2, the rack 1 moves in the sliding door moving direction (the direction of arrows A and B in FIGS. 1 and 2).
And is mounted on the rail 3 with the teeth facing the interior of the room.

On the other hand, the brake 2 has a hollow outer case 5 and a gearbox 6 (FIG.
) Is rotatably supported.

A pinion 9 is mounted on a portion of the input shaft 7 protruding outside the outer case 5 via a one-way clutch 8.

The one-way clutch 8 is used when the sliding door moves in the opening direction, that is, when the sliding door moves
When moving in the direction, the pinion 9 idles with respect to the input shaft 7, and when moving in the opposite direction, that is, in the direction of arrow B, the pinion 9 is integrally connected to the input shaft 7.
Currently such one-way clutches are commercially available as units.

A large-diameter first gear 11 is integrally connected to the inner end of the input shaft 7 as shown in FIG.
The first gear 11 meshes with a second gear 12 having a smaller diameter than the first gear integrally connected to an idle shaft 15 parallel to the input shaft.

A third gear 13 having a larger diameter is integrally and coaxially connected to the second gear 12. The third gear 13 is a small-diameter fourth gear formed at one end of an output shaft 16. 14 is engaged.

The first to fourth gears 11 to 1
Reference numeral 4 denotes a speed-increasing gear 6, which increases the rotation speed of the input shaft 7 and transmits the same to the output shaft 16.

An eddy current damper 17 (see FIG. 2) is connected to the other end of the output shaft 16.

That is, the other end of the output shaft 16 has a disk 18 made of a conductor made of a non-magnetic material such as aluminum.
A first magnet disc 21 and a second magnet disc 22 are attached to the housing on both sides of the disc so as to sandwich the disc 18 therebetween.

The first and second magnet disks 21 and 22 correspond to FIG.
As shown in FIG. 5, a plurality of N poles and S poles equally divided along the circumference are alternately arranged.

When the north pole of the first magnet disk 21 faces the south pole of the second magnet disk 22, the magnetic field lines move from the north pole of the first magnet disk to the south pole of the second magnet disk. Flowing.

Here, when the disk 18 is rotated, the disk 1
The eddy current 8 acts to prevent the rotation of the disk 18 due to the generation of an eddy current, thereby exhibiting a function as a brake.

In the illustrated embodiment, the first magnetic disk 2
1 is fixed to the housing 19 (see FIG. 2) so as not to be rotatable, while the second magnet disk 22 is mounted so as to be rotatable around the output shaft 16.

A pin 23 (see FIG. 3) protrudes from an outer peripheral portion of a surface of the second magnet disk 22 not facing the disk 18.

On the other hand, although not shown, a guide path parallel to the second magnet disk 64 is formed in the outer case 5, and a small block-shaped pin engaging piece 24 (see FIG. 3
) Are movably guided.

A female screw hole 25 is formed in the pin engaging piece 24 and is screwed with an adjusting screw 26. The adjusting screw 26 is attached to one end of the outer case 5 in a state where movement in the length direction is prevented.

The second magnetic disk 22 of the pin engaging piece 24
A groove 27 having a width slightly larger than the outer diameter of the pin 23 is formed on the surface facing the pin 23, and the pin 23 is movably held in the groove.

In the above-described configuration, when the adjusting screw 26 is rotated by a driver or the like, the pin engaging piece 24 moves back and forth in the length direction of the adjusting screw, and the pin 23 sandwiched between the grooves 27a becomes the second magnet circle. Since the second magnetic disk 22 moves in the circumferential direction of the plate 22, the second magnetic disk 22 rotates about the output shaft 16, and the phase changes with respect to the first magnetic disk 21.

As a result, the number of lines of magnetic force flowing from the N pole of the first and second magnet disks to the S pole of the second and first magnet disks changes, and the magnitude of the eddy current generated in the disk 18 changes. Therefore, the braking force increases and decreases.

The above-mentioned eddy current damper is of a dry type without using a liquid or the like, and can obtain a stable braking effect without being affected by the outside air temperature.

In the present invention, the mounting position of the rack 1 on the rail 3 is appropriately set in accordance with the mounting position of the brake 2 having the above-described configuration on the sliding door, and from the time of opening the sliding door to the beginning of the movement in the closing direction. The rack 1 and the pinion 9 are engaged with each other.

Further, by adjusting the length of the rack 1, the operating time of the delay device according to the present invention and the moving range of the sliding door in which the speed of the sliding door becomes extremely slow are appropriately set.

Further, as shown in FIG. 1, both ends of the rack 1 are cut obliquely so that the height of the teeth becomes lower toward the tip, so that the engagement with the pinion 9 can be made smooth and reliable. And

The reason why the both ends of the rack 1 are slanted in FIGS. 1 and 2 is to accommodate both the sliding door that moves leftward when closed and the sliding door that moves rightward. When the engagement between the pinion 1 and the pinion 9 is not released and the moving direction of the sliding door is fixed, only one end of the rack needs to be shaved.

In addition, the speed increase rate of the eddy current damper speed increaser is relatively large, and the material of the magnet disks 21 and 22 is appropriately selected to increase the braking force of the eddy current damper. The delay time is adjusted to be, for example, about 10 to 15 seconds.

When the sliding door is opened, that is, when the sliding door is moved in the direction of arrow A in FIG. 1 and FIG.
Pinion 9 of the brake 2 that moves in the same direction following the sliding door
Does not engage with the rack 1 during the opening stroke.

When the sliding door is further opened, the pinion 9 engages with the rack 1 before the sliding door is opened.
Starts rotating, but the brake 2 does not operate because of the idling around the input shaft 7 due to the action of the one-way clutch 8, so that the sliding door can be opened lightly regardless of the presence of the delay device.

When the sliding door is opened and a person or a wheelchair passes through the door and then releases the hand holding the sliding door, the sliding door starts moving in the closing direction by a door closer (not shown).
At the same time, the pinion 9 also starts rotating.

The direction of rotation of the pinion at this time is opposite to that when the sliding door is moved in the opening direction, so that the pinion 9 is moved by the action of the one-way clutch 8 to the input shaft 7 of the brake 2.
Are integrally connected.

Thereafter, the rotation of the pinion 9 is transmitted to the eddy current damper 17 via the gearbox 6, and the sliding door is braked by the eddy current damper as described above. As a result, the sliding door closes very slowly for a while. Since it moves in the direction, pass a wheelchair or the like in the meantime.

The degree of the delay at this time depends on the weight of the sliding door and the output of the door closer.
Turn (see FIG. 3) to set appropriately.

The present invention is not limited to the illustrated embodiment but can be variously modified and implemented.

For example, in the illustrated embodiment, the rack 1 is fixed to the rail 3 and the brake 2 is mounted on the sliding door. However, it goes without saying that the rack 1 may be mounted alternately. .

In the illustrated embodiment, the pinion is supported on a vertical input shaft. However, the pinion may be mounted on a horizontal input shaft. In this case, the rack 1 has its teeth facing upward or downward. To the door frame or sliding door.

[0045]

As is apparent from the above description, the present invention can reduce the size of the brake because it is a dry type using an eddy current damper, and can reduce the size of the brake compared with a hydraulic type damper. No liquid sealing device is required, and manufacture and maintenance are easy.

Further, since the function of the brake does not change with temperature for the same reason, it is not necessary to adjust the orifice depending on the season, and various effects such as easy management can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a delay device according to an embodiment of the present invention.

FIG. 2 is a partial sectional front view thereof.

FIG. 3 is a perspective view showing an example of a configuration of an eddy current damper by developing parts.

[Explanation of symbols]

 Reference Signs List 1 rack 2 brake 5 outer case 6 gearbox 7 input shaft 8 one-way clutch 9 pinion 16 output shaft 17 eddy current damper

Continued on front page F-term (reference) 2E050 KA00 3J030 AC10 BA01 BA08 CA10 5H607 AA12 AA15 BB21 EE05 EE14 EE18 EE24 EE54

Claims (1)

[Claims] 1. A rack extending in the direction of movement of a sliding door, and a brake having a pinion that can selectively mesh with and engage with the rack, wherein the brake is connected to the pinion via a one-way clutch. It has a connected gearbox and an eddy current damper connected to the output side of the gearbox. When one of the sliding door and the door frame is equipped with a rack and the other is equipped with a brake and the sliding door is opened. A delay device for a sliding door, characterized in that the mounting positions of the pinion and the rack are set so that the pinion and the rack are engaged with each other from near to the start end of the moving stroke in the closing direction.