JP3150030B2 - Safety devices for sliding door machines for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a pair of sliding door machines provided at an entrance opening of a side wall of a vehicle and opened and closed on both sides.

[0002]

2. Description of the Related Art Conventionally, as a sliding door machine for a vehicle, for example, the one shown in FIG. 2 is known. This sliding door machine includes a pair of sliding doors 151, 1 on brackets 14a to 14d of four door rollers 13 running on rails 12 provided horizontally along an opening upper edge 11 of a vehicle side wall 10 (see FIG. 3).
5r while suspending the inner upper end and the outer upper end, respectively, while the vehicle side wall 10 near the both sides of the opening above the door roller 13
, A pair of pulleys 16l and 16r on which a belt 17 is stretched are pivotally mounted. Then, the distal end of the lower connecting bar 18d having a length substantially equal to the distance between the pulleys is connected to the right sliding door 15r.
And a base 19d of the connecting bar 18d is fixed to the lower belt 17 near the pulley 16l with six screws 20. Also,
Similarly, the tip of the upper connecting bar 18u is connected to the left sliding door 15l.
Is connected to the outer bracket 14a by a pin 19l, and the base end of the connecting bar 18u is similarly fixed to the upper belt 17 near the pulley 16r. Both connecting bars 18d, 18u are
As shown in FIG. 3, the lower connecting bar 18d has a U-shaped cross section surrounding the pulley 16, and the lower connecting bar 18d is disposed with a gap immediately above the door roller 13, and the belt 17 is broken due to aging or the like. However, the base end that is not pivotally attached to the bracket 14d stops at the door roller 13.

[0003] Immediately above the upper connecting bar 18u, an air cylinder 21 is arranged in parallel with a gap therebetween and fixed to the vehicle side wall 10, and the tip of the cylinder rod 22 is connected to the upper connecting bar 18u via a metal fitting 23. By being connected to the vicinity of the front end, the upper connecting bar 18u and the lower connecting bar 18d are reciprocated in opposite directions via the belt 17 so that the sliding door 15
Open and close l, 15r to both sides. The open / closed state of the double sliding door by this air cylinder is as shown in FIGS. 4 (B) and 4 (A). A limit switch (not shown) is provided between the opposed inner brackets 14b and 14c of the sliding doors that are in contact with one of the brackets to detect a closed state, so that the vehicle can move up and down the passenger. When the vehicle stops at the station, the vehicle cannot depart unless the switch detects the closed state of the sliding door. The opening and closing of the double sliding door is performed by the single air cylinder 21 via the pulley 16 and the belt 17 because the driving device is integrated into one to simplify, reduce the weight, and reduce the cost of the sliding door machine. This is because belt driving produces less noise than rack and pinion driving.

[0004]

The belt 17 for transmitting the driving force for opening and closing the sliding door is a strong belt having a twisted wire as a core material, and is regularly inspected and replaced, but under severe operating conditions. May break within its useful life due to minor damage. FIG. 4 shows a state in which the belt is stopped while the station is stopped.
(B), when the sliding door is opened, the left sliding door 15l directly connected to the air cylinder 21 is closed, but the right sliding door 15r receiving power from the belt is not closed, so that the limit switch detects the closed state. Without this, the vehicle cannot depart, so it is fail safe and there is no safety problem. However, if the belt 17 is broken while the vehicle is running and the sliding door is closed as shown in FIG. 4 (A), the left sliding door 151 is held at the closed position by the air cylinder, but becomes free.
5r may move freely in the opening direction as the vehicle accelerates or decelerates, and the passenger may fall out of the vehicle from the opening. In particular, during vehicle driving under packed conditions such as rush hour,
Such a situation would lead to catastrophe.

Accordingly, an object of the present invention is to pay attention to the fact that when a belt stretched over a pair of pulleys is broken in a state where a sliding door is closed, tension is lost and the belt bends, and the base end of the connecting bar also bends. It is an object of the present invention to provide a safety device for a vehicle sliding door machine capable of preventing a sliding door from opening with a simple and inexpensive configuration by utilizing this and preventing a fall of a passenger from a traveling vehicle.

[0006]

In order to achieve the above object, a safety device for a sliding door machine for a vehicle according to the present invention comprises four door wheels running on rails provided along an upper edge of an entrance opening of a vehicle side wall. A pair of pulleys with belts are pivotally mounted on the brackets of the pair of sliding doors by suspending the inner upper end and the outer upper end of the pair of sliding doors, respectively, and a pair of pulleys with a belt stretched on the vehicle side walls near the both sides of the opening above the door bogie. While connecting the lower belt and the outer bracket of one sliding door to the upper belt and the outer bracket of the other sliding door, respectively, while rotating one of the pulleys with a motor, or one of the outer brackets A safety device for a sliding door machine for a vehicle that reciprocates with a cylinder, wherein the lower connecting bar pivotally connects a distal end to one of outer brackets of the pair of sliding doors in a closed state, and has a proximal end. Fixed to the underside of the belt in the other pulley near a gap extending directly above the door rollers,
The upper connection bar has a distal end pivotally attached to the other outer bracket of the pair of sliding doors in a closed state, and has a base end fixed to an upper belt near one of the pulleys. On one of the side surfaces, at least one pin is protruded, while on the other side of the connection bar, when a pair of sliding doors open from the closed state to both sides when the belt breaks,
An engaging claw that engages with the pin to prevent relative movement of the connecting bar is provided. Further, the outer shape of the engaging claw may be formed in a ratchet shape that does not engage with the pin when the pair of sliding doors closes from the open state toward the center when the belt is broken.

[0007]

In the safety device according to the present invention, at least one of the lower connecting bars has a front end pivotally connected to an outer bracket of one sliding door and a base end fixed to a lower belt near the other pulley. One pin is projected, the tip is pivotally connected to the outer bracket of the other sliding door, and the engaging claw is provided on the upper connecting bar whose base end is fixed to the upper belt near one pulley. . If the belt breaks when both sliding doors are closed, the belt loses tension and flexes,
The upper connection bar, whose distal end is pivotally attached to one outer bracket and whose vicinity is supported by one pulley, has its base end largely bent downward. On the other hand, a lower connecting bar extending right above the door roller with a gap and having a tip pivotally connected to the other outer bracket is supported by the door roller and maintains a substantially horizontal state. Therefore, the engaging claw provided on the side surface of the upper connection bar whose base end is largely bent downward immediately engages with the pin provided on the side surface of the lower connection bar in a substantially horizontal state. If the belt breaks when the sliding door is closed, both sliding doors will open when the pulley is driven by the motor, and the other sliding door when one of the outer brackets is driven by the cylinder, due to the acceleration or deceleration of the vehicle. However, as described above, since the engaging claw immediately engages with the pin to prevent relative movement of the upper and lower connecting bars, the sliding door does not open and the passenger does not fall from the opening.

Conversely, when the engaging tab is provided on the lower connecting bar and the at least one pin is provided on the upper connecting bar, and the belt is broken in the sliding door closed state, the base end is lowered. The pin of the upper connecting bar which is largely bent engages with the engaging claw of the lower connecting bar in a substantially horizontal state, and the sliding door is similarly prevented from opening. If two or more pins are provided, even if the engaging claws do not properly engage with the first pin, the next pin will be prevented from engaging and the sliding door will be opened. Is secured. Further, if the outer shape of the engaging claw is formed in a ratchet shape as described in claim 2, the belt is broken when both sliding doors are opened, for example, when the vehicle is stopped, and the sliding doors are closed toward the center by hand. In this case, the engaging claw of one connecting bar does not engage with the pin of the other connecting bar, and the engaging claw engages with the pin only after both sliding doors are closed, so that the sliding door does not open thereafter. , Passenger safety is ensured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a detailed view of a main part of an example of a safety device for a vehicle sliding door machine according to the present invention in a closed state of a sliding door. This safety device is a conventional safety device for a vehicle sliding door machine described with reference to FIGS. The components are provided on the upper and lower connecting bars, and the configuration other than the connecting bar is the same as that of the above-described conventional sliding door for vehicles. The upper and lower connecting bars 1u and 1d have a length substantially equal to the distance between the left and right pulleys 16l and 16r, and as shown in FIG.
u has a slightly wide U-shaped cross section so as to cover the lower connecting bar 16d, and is horizontally disposed facing the pulleys 16l and 16r so as to surround the pulleys 16l and 16r.

The lower connecting bar 1d is connected to the outer bracket 14d of the right sliding door 15r by a pin 19r when the sliding door is closed, as shown in FIG. At 20 (only a part is shown), it is fixed to the lower belt 17 in the vicinity of the left pulley 16l, and two pins 2 project from the side surface at an interval in the longitudinal direction. As shown in FIG. 2, the upper connecting bar 1u has a pin 19l connected to the outer bracket 14a of the left sliding door 15l in a state where the sliding door is closed, and a proximal end near the right pulley 16r by a similar screw 20. And is fixed to the upper belt 17 of
An engagement claw 3 having a ratchet-like outer shape is provided on the side surface of the tip portion located slightly to the right of the right pin 2.

As shown in FIG. 2A, the upper connecting bar 1u is pivotally connected to the outer bracket 14a via the pin 19l and the left end is supported by the left pulley 19l when the sliding door is closed as shown in FIG. If the belt 17 stretched between the pulleys 19l and 19r breaks in this state, the right end thereof is largely bent downward as shown in FIG. 1C due to the loss of belt tension and the weight of the connecting bar itself. . Further, the lower connecting bar 1u tends to fall on the left side that is not pivoted by the pin 19r due to the breakage of the belt 17, but this fall is prevented by the door wheel 13 located immediately below, so that the substantially horizontal state is maintained. I do. Therefore, the right-angle corner of the engaging claw 3 of the upper connection bar 1d is engaged with the right pin 2 of the lower connection bar 1u. If the engaging claw 3 passes through the right pin 2 due to a large impact force at the time of breaking, etc., the right-angled corner and the tip of the engaging claw 3 are located between the left and right pins 2. It is dimensioned to fit. Thus, the relative movement of the upper and lower connecting bars 1u, 1d to the left and right, that is, the opening operation of the left and right sliding doors 15l, 15r to both sides is prevented.

The engaging claw 3 has a ratchet-like outer shape in which the opposite side of the right-angled corner forms an arc, and when the belt 17 is broken with the sliding door open as shown in FIG.
When the upper and lower connecting bars 1u and 1d move side by side to the position of FIG. 1 (C) with closing the r by hand, the upper connecting bar 1u becomes 1d, it can move rightward over the two pins 2, 2 in order from the left.

[0013] The safety device for a sliding door machine for a vehicle having the above configuration includes:
It works as follows. Sliding doors 15l, 15r while driving
However, when the belt 17 stretched on the pulleys 16l and 16r breaks in a closed state as shown in FIGS. 1A and 4A, the belt 17 loses tension and bends.
As shown in FIG. 2 (A), the upper connecting bar 1u whose left end is pivotally attached to the outer bracket 14a of the left sliding door 15l and whose left end is supported by the left pulley 16l has its own weight as shown in FIG. 1 (C). As a result, the right side is largely bent downward. On the other hand, as shown in FIG. 2 (A), the right side sliding door 1 is provided slightly above the door roller 13 and has a right end.
The lower connection bar 18d pivotally attached to the outer bracket 14d of 5r is supported by the door roller 13 and keeps a substantially horizontal state as shown in FIG. Therefore, the left end of the upper connection bar 1u that largely bends downwards covers the lower connection bar 1d, and the right-angled corner of the engaging claw 3 provided on the left end side surface is the lower connection bar 1d. Immediately engages with the right pin 2 as shown in FIG.

If the belt 17 breaks with the sliding door closed,
Right sliding door 15r not directly driven by air cylinder 21
However, as described above, the engaging pawl 3 is immediately engaged with the pin 2 to prevent the upper and lower connecting bars 1u and 1d from moving in the directions away from each other, because the engaging pawl 3 is opened due to acceleration and deceleration during running of the vehicle. The sliding doors 15l and 15r do not open to both sides, and passengers do not fall out of the vehicle from the openings. In this embodiment, since the two pins 2 that engage with the engaging claws 3 are provided, the belt 17 is broken when the sliding door is closed, and the engaging claws 3 are broken due to a large impact force at the time of breaking. Even if the pin 2 on the right side is not properly engaged, the pin 2 on the left side is engaged in a fitted state.
There is an advantage that the opening operation of l, 15r is prevented in two steps, and passenger safety is further ensured.

Next, when the belt 17 stretched on the pulley is broken while the vehicle is stopped at the station and the sliding door is opened as shown in FIG. 4B, the right sliding door 15r which is not directly driven by the air cylinder 21 is used. Does not close, and the limit switch cannot detect the closed state of the sliding door, so that the vehicle cannot start. Therefore, there is no safety problem. However, the sliding door may be closed and the vehicle may have to travel to a predetermined evacuation line. In such a case, the sliding door 15l,
When closing the 15r by hand toward the center, the upper and lower connecting bars 1u and 1d move so as to be shifted from the position of FIG. 4B to the position of FIG. Engaging claw 3
However, since it has a ratchet-like outer shape having an arc portion, it does not engage with the pin 2 when moving to the right, and only when the sliding doors are completely closed as shown in FIG. It engages with the pin 2 to prevent the relative movement of the upper and lower connecting bars 1u, 1d. Therefore, the sliding doors 15l and 15r do not open to both sides thereafter, and the safety of the passenger when traveling to the evacuation line is secured. As described above, in this embodiment, since the engaging claw 3 is formed in a ratchet shape, even if the belt is broken in a state where the sliding door is opened, the opening operation of the sliding door can be prevented after the sliding door is manually closed. There is.

In the above embodiment, the engaging claw 3 is provided on the upper connecting bar 1u, and the pin 2 is provided on the lower connecting bar 1d. Conversely, the pin is provided on the upper connecting bar 1u and the lower connecting bar 1u is provided with the pin. The connecting bar 1d may be provided with an engaging claw. In this case, if the belt breaks with the sliding door closed, the pin of the upper connection bar, whose end opposite to the pivot side is largely bent downward, is supported by the door roller and the lower connection that maintains a substantially horizontal state By engaging with the engaging claws of the bar, the movement of the upper and lower connecting bars in directions away from each other is prevented, the opening operation of the sliding door is prevented, and the safety of the passenger is similarly ensured. Further, the upper and lower connecting bars can be driven by rotating either the left or right pulley by a motor. In this case, when the belt breaks, the power transmission is cut off, so that both sliding doors cannot be driven.However, the operation of the safety device itself is not different from that of the above-described embodiment, and therefore, the same operation and effect as described above are obtained. Is played. Note that the engaging claw of the present invention does not have to be in a ratchet shape as in the embodiment.
It can be a book.

[0017]

As is apparent from the above description, the safety device for a sliding door machine for a vehicle according to the present invention is provided with brackets for four door wheels running on rails at the upper edge of an entrance opening of a vehicle side wall.
In a sliding door machine in which a pair of sliding doors are hung on an inner upper end and an outer upper end, respectively, and a pair of pulleys with belts are pivotally mounted on both sides of an entrance opening of a side wall of a vehicle slightly above the sliding door, a lower connecting bar. Of the pair of closed sliding doors is pivotally connected to one outer bracket of the pair of sliding doors, and the base end is fixed to a lower belt near the other pulley, while the distal end of the upper connecting bar is pivotally connected to the other outer bracket. And the base end is fixed to the upper belt in the vicinity of one of the pulleys, and at least one pin is protruded on one of the side surfaces of the connection bar, while the other side of the connection bar is When the pair of sliding doors are opened to both sides from the closed state when the belt is broken, an engaging claw that engages with the pin to prevent the relative movement of the connecting bar is provided. , The engaging claw immediately Combined relative movement of the connecting bar in the opening direction is prevented, the opening operation of the sliding door is reliably prevented, with at simple and inexpensive structure, falling passengers from the opening of the traveling vehicle can be prevented.

Further, when the pair of sliding doors closes from the open state toward the center when the belt is broken,
If the ratchet is not engaged with the pins, when the belt is broken with the sliding door open, when the sliding door is manually closed, the engaging claws do not engage with the pins, and only when both sliding doors are closed are the engaging claws. Engages the pin, so the sliding door does not open again,
Passenger safety when the vehicle travels to the evacuation line can be ensured.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a safety device for a sliding door machine for a vehicle according to the present invention in a closed state of a sliding door in a normal state, a cross-sectional view, and a front view in a state where a belt is broken.

FIG. 2 is a front view and a plan view of a conventional vehicle sliding door machine.

FIG. 3 is a detailed sectional view of a conventional sliding door machine for a vehicle.

FIG. 4 is a schematic front view of a conventional sliding door machine for a vehicle in a sliding door closed and sliding door open state.

[Explanation of symbols]

1u Upper connection bar 1d Lower connection bar 2 Pin 3 Engagement claw 10 Side wall of vehicle 11 Door opening 12 Rail 13 Door car 14a-14d Bracket 15l, 15r: Sliding door, 16l, 16r: Pulley, 17
... belt, 19l, 19r ... pin, 20 ... screw, 21 ... air cylinder, 22 ... cylinder rod.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E05F 15/00-15/20 B61D 19/00

Claims (2)

(57) [Claims] An inner upper end and an outer upper end of a pair of sliding doors are respectively suspended on brackets of four door rollers running on rails provided along an upper edge of an entrance opening of a vehicle side wall,
A pair of pulleys with a belt stretched around the vehicle side wall near both sides of the opening above the door roller, and the connecting bar is used to connect the lower belt and the outer bracket of one sliding door to the upper belt. A safety device for a vehicle door closing machine in which one of the pulleys is rotated by a motor, or one of the outer brackets is reciprocated by a cylinder, while connecting the outer brackets of the other sliding doors, respectively. The lower connection bar has a distal end pivotally attached to one outer bracket of the pair of sliding doors in a closed state, and a base end fixed to a lower belt near the other pulley, and a gap immediately above the door roller. The upper connecting bar is extended with the tip end pivotally connected to the other outer bracket of the pair of sliding doors in the closed state, and the base end fixed to the upper belt near one pulley. When done Moni, on either side of the connecting bar, while projecting at least one pin, the other side of the connecting bar,
When the pair of sliding doors are opened from the closed state to both sides when the belt is broken, an engaging claw that engages with the pin to prevent the relative movement of the connecting bar is provided. 2. The vehicle according to claim 1, wherein the engaging claw has a ratchet-shaped outer shape that does not engage with the pin when the pair of sliding doors closes from the open state toward the center when the belt is broken. Safety device for sliding door machinery.