JP4020841B2 - Sliding door braking device - Google Patents

Description

  The present invention relates to a sliding door braking device.

  Conventionally, in a self-closing type sliding door, in order to brake the closing movement of the sliding door, a rotary braking device using oil flow resistance is installed on the sliding door side, and a pinion is provided on the rotating shaft of this rotary braking device, A brake rack that meshes with the pinion is attached to the side, and when the sliding door is closed, the pinion is meshed with the braking rack to rotate the rotating shaft, and the rotational braking device functions to give the sliding door a braking force. A sliding door braking device is known. Further, in order to brake the opening operation of the sliding door, it is composed of a similar braking device, a pinion and a braking rack, and the braking force is applied to the sliding door by rotating the shaft body by meshing between the braking rack and the pinion when the sliding door is opened. There is also known a sliding door device that provides the above (Patent Document 1).

  However, the sliding door device has a problem that an impact sound is generated when the pinion starts to mesh with the braking rack when the sliding door is closed, and when the sliding door is opened, although not as much as when the sliding door is closed. There is a similar problem, especially in indoor places where quietness is required, such as hospitals and elderly residences.

Accordingly, it has been proposed that when the pinion starts to mesh with the braking rack, the pinion is idled and braking is applied after the pinion is securely meshed, thereby eliminating the above-described noise (Patent Document 2). .
JP-A-8-218726 JP 2001-288955 A

However, since the idling device described above is provided with the idling mechanism incorporated in the pinion, there is a problem that the structure of the pinion becomes complicated and expensive.
The present invention solves such a problem, and the impact sound generated when the sliding door is closed or opened is mitigated by a braking device having a simple structure, and the sliding door is closed or opened while keeping quiet. It is an object of the present invention to provide a sliding door braking device that can be used.

In order to solve the above problem, the sliding door is configured to automatically close from the open state, and includes a braking rack having a certain length along either the sliding door or its supporting rail, The sliding door is braked by attaching a pinion to the sliding door, engaging the braking rack with the pinion when the sliding door is opened and closed, and applying a braking force to the driven rotation of the pinion at this time. A device,
The pinion shaft that rotates during the opening and closing movement and the rotation shaft of the rotary braking device that applies a braking force to the driven rotation of the pinion are arranged on the same axis line, and are arranged so that both end faces face each other. The shaft of the pinion is screw-fitted to the bearing, and the rotation shaft end surface of the pinion can be adjusted relative to the rotation shaft end surface of the rotary braking device by forward and reverse rotation of the pinion, and by the rotation of the pinion When the shaft end face approaches a certain distance, both shafts are connected to each other so that the braking force of the rotary braking device acts on the pinion.

  Before the braking device that opens and closes the sliding door functions, the pinion rotates in mesh with the braking rack, and this rotation brings the pinion shaft closer to the braking device shaft and eventually connects the two shafts together. Since the braking force is applied at this time, the pinion idles for a certain period of time from when the pinion starts to mesh with the braking rack until the shaft is connected, and noise at the beginning of meshing occurs. In addition, since the mechanism for providing the idling period is very simple, it is easy to implement and can be provided at low cost.

Hereinafter, a braking device for a sliding door according to an embodiment of the present invention will be described.
In FIG. 1, the sliding door 1 is provided in an opening frame portion formed by an upper frame 2 of an indoor doorway, a door end side frame 3, a door bottom side frame 4 and a floor 5.

Door pulleys 8 and 9 are rotatably supported via brackets 6 and 7 at predetermined positions near the door tip 1b and the door butt 1c of the upper end 1a of the sliding door 1, respectively.
Further, a frame 10 (FIG. 2) having a substantially L-shaped cross section that is inclined downward toward the door tip 1a side is attached to the upper frame 2, and the door 8 of the sliding door 1 is mounted on the rail 11 formed on the frame 10. , 9 are mounted so as to be freely rollable. Accordingly, the sliding door 1 is automatically lowered and closed on the rails 11 inclined by its own weight in the direction of the door with the doors 8 and 9.

A guide roller 12 is erected on the floor 5 to guide the sliding door 1 so as not to swing in the front and back direction.
Further, a stopper roller 14 that is engaged with a stopper 13 provided near the door bottom of the inclined frame 10 is attached to the bracket 7 near the door bottom.

As shown in FIGS. 1 and 2, a braking rack 29 is attached to a portion closer to the door tip on the lower surface portion of the inclined frame 10 with the tooth surface 29 t facing upward. A support frame 6a is attached to the bracket 6 near the door end, and a braking device 16 is attached to the support frame 6a. For example, as shown in FIG. 2 or FIG. 4, the braking device 16 supports a rotating shaft 18 having wings (not shown) in a sealed container 17 in which oil is sealed, and the wings on the inner surface of the sealed container 17. By using a baffle plate at a position that does not buffer the rotational movement of the baffle, a structure in which the rotation of the wing is braked by the baffle plate using the viscosity of oil is used.
A pinion 28 is supported on the bracket 6 by a bearing 19 so that its shaft 20 is coaxial with the rotating shaft 18 of the braking device 6, and is used for braking at a predetermined range position before the sliding door 1 is completely closed. A pinion 28 meshes with the rack 29.

The shaft hole of the bearing 19 is a shaft hole having a female screw hole, the shaft 20 of the pinion 28 is a male screw shaft that is screwed into the female screw hole of the bearing 19, and if the pinion 28 rotates forward and backward, Accordingly, the male screw shaft 20 is advanced and retracted in the axial direction according to the pitch of the thread. A pin 22 is erected in the radial direction at the shaft end 21 of the male screw shaft 20 on the braking device 16 side.
In the figure, reference numeral 24 denotes a spring that constantly presses the male screw shaft 20 toward the braking device 16, and reference numeral 25 denotes a nut attached to receive the spring 24, which can be replaced with one having an equivalent function, such as a flange. is there.
On the other hand, a cap body 27 having an axial step portion 26 that engages with the pin 22 is provided at the shaft end of the braking device side rotating shaft 15 facing the shaft end 21 of the male screw shaft 20, and approaches while rotating. The pin 22 engages with the axial step 26 so that the pinion-side male screw shaft 20 and the braking device-side rotating shaft 15 rotate together.

The number of teeth of the braking rack 29 is about 2 to 3 times the number of teeth of the pinion 28.
Accordingly, the rotational speed of the pinion rotating by engaging with the braking rack 29 is set to 2 to 3 rotations, and the axial movement amount of the male screw shaft 20 by this rotation is set to 2 to 3 times the screw pitch. .
Therefore, the distance of this advance / retreat is about 1 mm to 2.1 mm depending on the diameter of the male screw shaft 20, and the pin 22 is engaged and disengaged from the step portion 26 during the moving range.
Next, the operation of the buffer device for the sliding door will be described with reference to FIG.
When the sliding door 1 is moved in the direction of the arrow d from the state in which the sliding door 1 is closed as shown in FIG. 1, the pinion 28 that meshes with the braking rack 29 rotates as shown in FIGS. The pin 22 rotates as shown in FIG. At the same time, the shaft 20 is fed by the amount of the screw pitch and moves to the left side of the drawing, and completely leaves the step portion 26 as shown in FIG.
Therefore, the pinion 28 rotates idly from the beginning of the rotation regardless of the braking device 16, and after two or three rotations, the pinion 28 is detached from the braking rack 29. Therefore, the pinion 28 stops rotating in the state shown in FIG. To do. Accordingly, the male screw shaft 20 does not move further in the axial direction.
If the sliding door 1 is left open after necessary opening, the sliding door 1 naturally returns and moves in the closing direction along the inclination of the support rail 11.
When the pinion 28 returns to the position where it engages with the braking rack 29, the male screw shaft rotates in the direction opposite to that shown in FIG. 5, and the male screw shaft 20 is rotated from the position shown in FIG. Advancing in the axial direction toward the 16 side by an amount corresponding to the screw pitch. At this time, since the force that restricts the rotation is not applied to the male screw shaft 20 at all, the pinion is in an idling state, and therefore no noise is generated when it starts to engage with the braking rack 29.
Next, as shown in FIG. 9, the pin rotates with the rotation of the male screw shaft 20 and advances in the axial direction, and eventually engages with the step portion 26 of the cap 27 of the braking device 16 as shown in FIG. Start spinning.
Therefore, the braking force of the braking device 16 is transmitted to the pinion 28, and braking is started on the sliding door closing side. Eventually, the door is quietly abutted against the door frame 3 and closed.

And when opening a door again, it will be in the state of FIG. 7 and it can open now smoothly.
In the above embodiment, the case where braking is performed when the door is closed is shown. However, the braking rack (29) is attached to the inclined frame 10 near the door bottom 1c with the tooth surface 29a facing upward, and the sliding door 1 is opened at the same time as opening. It is also possible not to generate a large noise by colliding with the buttock side frame 3.

  According to the above embodiment, when the sliding door is closed or opened, the sliding door 1 is prevented from colliding with the side frame of each side, and a quiet engagement between the braking rack and the pinion is realized with a simple configuration. It becomes possible.

  As shown in FIG. 11, a rotation return spring 30 is provided on the rotating shaft 20 of the pinion 28 between the support frame 6a and the rotating shaft 20, and the position shown in the figure is a neutral position, and any of the arrows X and Y An urging force may be generated so as to return to the neutral position even if the pinion 28 is rotated in the direction, and whenever the pinion 28 is removed from the braking rack 29, the pinion may always return and rotate to the neutral position.

  The urging force is not limited as long as it generates a torque sufficient to cause the rotating shaft 20 to idle when the rotating shaft 20 becomes idle, and the urging force is applied until the braking force of the braking device 16 is overcome. It is not necessary to make it a force to force.

  When configured in this way, when the braking rack is discontinuously and continuously provided in two or three stages toward the braking direction, when the door opens and closes while meshing with each braking rack, When the pinion passes through one rack and heads for the next rack, the pinion shaft 20 is rotated back to the original position by the spring 30. Therefore, when it engages with the next rack, an idling period is always provided. Engagement can be realized.

It is a front view which shows the whole structure of the sliding door apparatus in one embodiment of this invention. FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. 1. It is a principal part top view of the braking device of the sliding door in FIG. It is a perspective view of the braking device of the sliding door. It is action | operation explanatory drawing of the braking device of the sliding door, and shows the state of door opening start. It is operation | movement explanatory drawing of the braking device of the sliding door, and shows the state immediately after opening. It is action | operation explanatory drawing of the braking device of the sliding door, and shows the state after the pinion remove | deviates from the rack for braking. It is operation | movement explanatory drawing of the braking device of the sliding door, and shows the state when a pinion begins to mesh with the braking rack when the door is closed. It is operation | movement explanatory drawing of the braking device of the same sliding door, and shows the state which the rack for braking and the pinion are meshing and rotating at the time of door closing. It is operation | movement explanatory drawing of the braking device of the same sliding door, and shows the state when a pin engages with a step part and the braking device begins to operate | move. It is principal part sectional drawing which shows the other structural example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding door 2 Upper frame 3 Door tip side frame 4 Door bottom side frame 5 Floor part 6 Bracket 6 Bracket 8 Door wheel 9 Door wheel 10 Frame 11 Rail 12 Guide roller 13 Stopper 14 Stopper roller 15 Brake-side rotating shaft 16 Braking device 17 Sealing Flow path 18 Rotating shaft 19 Screw bearing 20 Male threaded shaft 21 Shaft end 22 Pin 26 Axial stepped portion 27 Cap body 28 Pinion 29 Braking rack

Claims (3)

A braking rack having a fixed length along either the sliding door or its supporting rail, and a pinion attached to the other, the braking rack and the pinion are engaged when the sliding door is opened and closed, and the pinion is driven to rotate at this time. A sliding door braking device configured to brake the opening / closing movement speed of the sliding door by applying a braking force to the sliding door,
The pinion shaft that rotates during the opening and closing movement and the rotation shaft of the rotary braking device that applies a braking force to the driven rotation of the pinion are arranged on the same axis line, and are arranged so that both end faces face each other. The shaft of the pinion is screw-fitted to the bearing, and the rotation shaft end surface of the pinion is variable relative to the end surface of the rotation braking device by forward and reverse rotation of the pinion. A sliding door braking device configured such that when the end face approaches a certain distance, both shafts are connected to each other and the braking force of the rotary braking device acts on the pinion. 2. The sliding door braking apparatus according to claim 1, wherein a pin projecting in a radial direction protrudes from a rotary shaft on one side of a rotary shaft that is relatively adjustable in perspective, and engages with the pin on the other rotary shaft. A sliding door braking device in which a protrusion protrudes in the axial direction. 3. The sliding door braking device according to claim 1 or 2, wherein a rotation return spring is provided on the rotation shaft of the pinion so that the rotation shaft of the pinion is free to rotate away from the braking rack. The sliding door braking device is configured to be rotationally biased so as to be screwed in a direction away from the rotational axis of the rotational braking device.

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