JPS6142716B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for a passenger conveyor driven by an endless tread link that engages with a drive device installed between an outbound rail and a return rail for tread guidance.

2. Description of the Related Art Conventionally, there are pallet-type passenger conveyors shown in FIGS. 1 and 2 that continuously transport people from an airport ticket gate to an airplane departure and arrival point. In FIGS. 1 and 2, 1 is a main frame arranged horizontally under the floor, 2 is a drive chain gear provided at one end of the main frame 1, and 3 is a drive chain gear provided at the other end of the main frame 1. Drive chain gear 2 and driven chain gear 3
Although not shown, each has a pair, and an endless roller chain 4 is wound between the opposing driving chain gear 2 and driven chain gear 3, and a constant roller chain 4 is provided between the roller chains 4. A large number of tread plates 6 are attached to the tread plate shafts 5 so as to be continuous with no gaps, and tread rollers 7 are attached to both ends of each of the tread plate shafts 5. An outgoing rail 8 for guiding the treadle roller 7 is provided on the outgoing side of the chain 4, and a return rail 9 is provided on the return side of the chain. Reference numeral 10 denotes a drive device consisting of an electric motor and a speed reducer installed on the drive chain gear 2 side of the main frame 1. This drive device 10 and the drive chain gear 2 are linked via a chain transmission mechanism, and the drive chain 10 is connected to the drive chain gear 2 through a chain transmission mechanism. By rotating the gear 2, the chain 4 is run and the treadle 6 is moved. Further, as a safety device for the above-mentioned passenger conveyor, the device disclosed in Japanese Utility Model Publication No. 15674/1983 is used. An approximation of this is explained with reference to FIG. 2. A bearing 11 of the shaft of the driven chain wheel 3 is installed on a frame 12 attached to the main frame 1 so as to be slidable in the front and rear direction, and this bearing 11 is attached to the roller. A spring-type tensioning device 13 that applies a constant tension to the chain 4 is connected, and a link 15 that rotates according to the movement of the spring receiver 14 of the tensioning device 13 is attached to the fixed part 17 by a pin 16. Link 1
A microswitch 18 operated by 5 is attached to the fixed part 17. This micro switch 18 detects abnormalities when the roller chain 4 is cut or stretched abnormally, or when a foreign object is caught between the footboard 6 and the skirt guard, etc., and abnormal tension is applied to the roller chain 4. When the compression spring 13a of the tensioning device 13 expands and contracts due to the abnormal operation, and the spring receiver 14 rotates the link 15 in response to this, the micro switch 18
is operated to stop the passenger conveyor and ensure the safety of passengers.

However, the conventional safety device for passenger conveyors as described above does not apply to the tread link-driven passenger conveyor shown in, for example, Japanese Patent Publication No. 44-10454, etc., because the tread links of this passenger conveyor are compressible. , there was a problem that it could not be applied because the reversing part was not provided with gears or the like.

This invention was made to solve the above-mentioned problems, and includes a tread link-driven passenger conveyor, that is, a drive device is installed between the tread guide outbound rail and the return rail, which are fixed to the main frame. The tread link and the tread that engage with the drive device are connected endlessly by a tread shaft, and the tread rollers provided at both ends of the tread shaft are rotatably engaged with the outbound rail and the return rail, In a passenger conveyor in which an interval equal to the pitch of a treadle link is provided between both ends of an outbound rail and a return rail, an operating member is provided for operating a detection sensor before and after a treadboard roller that reverses in a constant trajectory when the treadle is reversed, An object of the present invention is to provide a safety device for a passenger conveyor, which controls the passenger conveyor to stop by operating a detection sensor using an operating member when the tread roller deviates from a fixed reversal trajectory due to breakage of the tread link, abnormal elongation, etc. shall be.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5. In these figures 3 to 5,
Reference numeral 20 denotes a main frame disposed horizontally under the floor surface, and channel-shaped outgoing rails 21 and 22 are fixed horizontally along the longitudinal direction of the main frame 20 on the left and right inner sides of the upper part of the main frame 20, respectively. Furthermore, channel-shaped return rails 23 and 24 are fixed horizontally along the longitudinal direction of the main frame 20 on the left and right inner sides of the lower part of the main frame.
Reference numerals 25 and 26 are endlessly connected tread links arranged over almost the entire length of both the outgoing rail and the return rail, which face each other vertically. A tread shaft 27 passing through each link connection point in the cross direction is installed horizontally, and this tread shaft 27
At both ends, treadle rollers 28, 29 are rotatably attached to the left and right outgoing rails 21, 22 and return rails 23, 24 to be engaged and rolled, and each treadle shaft adjacent to each other in the front and rear 27,2
Stepboards 30 are successively attached to each of the seven comrades. 31 is the above tread link 2
5, 26 along the outbound rails 21, 22 and the return rails 23, 24. The roller chain 31a meshes with the roller chains 25a and 26a, a sprocket 31b around which the roller chain 31a is wound, and an electric motor (not shown) for rotating the sprocket.

The roller rolling surfaces 21a, 22a of the outgoing rails 21, 22 and the roller rolling surfaces 23a of the return rails 23, 24 at the inverted portion of the treadle 31, that is, at both ends of the outgoing rails 21, 22 and the return rails 23, 24. , 24a is equal to the interval between the link connection points of the tread links 25, that is, the pitch P, as shown in FIG. The relationship between the outbound rail 22, the return rail 24, and the treadle link 26 is also the same).By doing this, when the treadboard links 25, 26 are driven to travel and the treadboard 30 is reversed,
The pair of tread rollers 28 and 29 that have come off the outbound rails 21 and 22 follow a constant trajectory (almost equivalent to a parabola)
(In addition, in the right-hand inverted section in Fig. 1, the treadle links 25 and 26 are reversed and transferred onto the return rails 23 and 24 from the return rail to the outbound rail side.) In the event of elongation or if a foreign object is trapped between the tread plate 30 and the skirt guard, the tread rollers 28, 29 will deviate from the above-mentioned constant reversal locus.

Therefore, in the passenger conveyor of the present invention, as shown in FIG. are located before and after the treadle roller 28, which moves along a certain reversal locus, and rotatably attach the actuating members 35 and 36 by separate pins 33 and 34. A certain gap d1, d2 is formed between the tread roller 28 and the tread roller 28, so that the tread roller 28 does not collide with any of the actuating members 35, 36 during normal reversal. Further, on the other end sides of the actuating members 35 and 36, a micro switch 3 is held by separate brackets 37 and 38 fixed to the actuating member 32.
The microswitches 39 and 40 are removably connected to the other ends of the respective actuating members 35 and 36, respectively. The microswitches 39 and 40 detect abnormalities in the passenger conveyor, control the conveyor drive to stop, and also display warnings and the like.

Next, the operation of the passenger conveyor of the present invention constructed as described above will be explained.

When the roller chain 31a is driven to travel in the direction of the arrow in FIG. 1 by activation of the drive device 31, the forward and return sides of the tread links 25 and 26 that engage with the upper and lower horizontal parts of the roller chain 31a move at the same speed. 1, and the treadle 30 also rolls on the rolling surfaces 21a, 22a and 23a, 24a of the outgoing rails 21, 22 and the return rails 23, 24. The tread link 2 is moved by the tread rollers 28 and 29.
5 and 26 will be operated in the same direction. At the same time, at both open ends of the outgoing rails 21, 22 and the return rails 23, 24, that is, at the treadle reversal portions, the outgoing sides of the treadle links 25, 26 run in the direction of arrow A, and the return sides thereof run in the direction of arrow B at a constant speed. The tread plate 30 supported via the tread shaft 27
will be sequentially reversed.

On the other hand, as the treadle 30 is reversed, the treadle rollers 28, 29 on the outgoing rails 21, 22 and the return rails 23, 2, as shown in FIG.
The treadle rollers 28'', 29'' on the 4 perform uniform motion in opposite directions, and therefore the outgoing rails 21, 22
The treadle roller 28', 2 in a free state that has jumped out from the
9' passes between the actuating members 35, 36 along a certain trajectory and is reversed toward the open ends of the return rails 23, 24. At this time, if there is no abnormality in the treadle links 25, 26 and the treadle 30, the actuating member 35 or 36 will not be operated by the reversing treadle rollers 28, 29.

In addition, the tread rollers 28 and 29 may be reversed due to breakage of the tread links 25 and 26, abnormal expansion and contraction, etc.
deviates from a certain trajectory, this tread roller 2
8 and 29 come into contact with the actuating member 35 or 36, and the micro switch 3 is rotated about the pin as a fulcrum.
9 or 40 and actuates the microswitch to suddenly stop the passenger conveyor and, if necessary, to display an abnormal condition of the conveyor.

In the above embodiment, abnormality detection of the conveyor is performed using a micro switch, but a detection sensor such as a photoelectric switch may also be used.

As explained above, the present invention provides a tread link-driven passenger conveyor in which no gears or the like are provided in the reversing section, in which support members provided on the main frame are provided with a support member located in front and behind the reversing locus of the tread roller. The actuating members are rotatably mounted, a slight gap is provided between one end of these actuating members and the reversal trajectory of the treadle roller, and a micro switch or the like is operated by the other end of the actuating member on the supporting member. The detection sensor is held, and when the tread roller deviates from a fixed reversal trajectory when an abnormality such as breakage of the tread link occurs, it contacts at least one of the operating members in front and rear of this reversal trajectory, and the contacted operating member rotates. Since the above-mentioned abnormality is detected by operating the detection sensor, it is possible to easily and reliably detect an abnormality in the tread link-driven passenger conveyor, and to ensure safe operation of the conveyor.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the entire passenger conveyor equipped with a conventional safety device, Fig. 2 is a side view showing details of the installation state of the conventional safety device, and Fig. 3 is a side view showing the entire passenger conveyor equipped with a conventional safety device.
The figure is a side view showing the entire passenger conveyor to which the safety device according to the present invention is applied, FIG. It is a sectional view along the - line of. 20... Main frame, 21, 22... Outbound rail, 2
3, 24... Return rail, 25, 26... Stepboard link, 27... Stepboard shaft, 28, 29... Stepboard roller, 30... Stepboard, 32... Drive device, 33...
Support member, 35, 36... Operating member, 39, 40
...Micro switch (detector).

Claims (1)

[Claims] 1. A drive device is installed between the outbound and return rails for tread guide that are fixed to the main frame, and the tread link and treadle that engage with this drive device are connected endlessly by a tread shaft, and In the passenger conveyor, the provided tread rollers are rotatably engaged with the outgoing rail and the return rail, and a distance equal to the pitch of the tread link is provided between both ends of the outgoing rail and the return rail. The operating members located in front and behind the reversing locus of the tread roller are rotatably attached to the supporting member, and a slight gap is provided between one end of these operating members and the reversing locus of the tread roller. The member holds a detector such as a micro switch operated by the other end of the actuating member, and the detector detects contact rotation of the actuating member due to deviation of the tread roller from the reversal trajectory, and detects abnormalities in the passenger conveyor. A safety device for a passenger conveyor, characterized in that it is configured to detect.