JP3668635B2 - Passenger conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a passenger conveyor, and more particularly to a passenger conveyor provided with inspection steps used for maintenance inspection work in a truss.
[0002]
[Prior art]
A conventional passenger conveyor is configured to have at least one inspection step as described in JP-A-62-249485, and the inspection step is composed of a tread, a riser, and a frame, The tread is pivotally supported on a rotating shaft at the upper part of the riser fixed to the rear outside the frame, and the tread plate lower surface and the frame are connected by two link arms so that the tread can rotate rearward. In the passenger conveyor having such a configuration, without removing the step or the cover of the inner deck, the step plate of the inspection step is rotated backward about the rotation axis to form an opening, and from this opening The maintenance work of the equipment in the truss was done.
[0003]
[Problems to be solved by the invention]
However, since the conventional passenger conveyor described above is configured to rotate the step board of the inspection step backward about the rotation axis in order to form an opening for maintenance work, the operator can move the rear part of the inspection step. Therefore, maintenance work must be performed from the side of the step that is higher than the opening, and the truss is looked into in an unreasonable posture with a risk of falling. In addition, as described above, since the tread plate is rotated and opened behind the inspection step, when two inspection steps are installed in succession, the inspection step located behind is the inspection step located in front. As a result, two continuous openings could not be formed, and it was difficult to efficiently perform maintenance work inside the truss.
[0004]
The objective of this invention is providing the passenger conveyor which aimed at the improvement of the maintenance workability | operativity in a truss.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the present invention constitutes a step group that forms a forward side and a return side below by connecting a plurality of steps, and at least one of the step groups includes a step plate as a frame. A passenger conveyor configured to be connected to and driven by a step chain wound around a drive and driven step chain sprocket. A step-side engaging member that is disposed on the back surface and protrudes and retracts when operated from the front surface side of the step board, and a frame-side engagement member provided on the frame body so as to be engaged by the protrusion of the step-side engaging member. The step plate is connected to the frame body in a separable manner , and the connection between the inspection step and the step chain is arranged to face the frame body of the inspection step with a predetermined distance therebetween. With The retaining member formed respectively through holes in the facing portion is provided, characterized by being connected by a bolt that moves the through hole of the holding member.
[0006]
When carrying out maintenance work in the truss, the passenger conveyor according to the present invention operates the tread side engagement member provided on the back surface of the inspection step from the front side, and the frame side provided on the tread side engagement member and the frame. Since the engagement with the engagement member is released and the tread is separated from the outside of the frame, the inside of the truss can be inspected through the opening formed by removing the tread. An operator can look into the truss in a safe posture from the step side located at the lower part of the step, and the maintenance workability is improved. Further, by removing the bolts to release the connection between the frame body and the step chain, the frame body can also be removed and a larger opening can be obtained.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a passenger conveyor according to an embodiment of the present invention.
The escalator exemplified as a passenger conveyor transmits the driving rotation of the driving driving machine 1 provided in the upper machine room to the upper driving step chain sprocket 3 by the driving chain 2, and the upper driving step chain sprocket 3 receives the step chain. A plurality of step groups connected endlessly to the step chain 5 have a normal step 6 and at least one inspection step 10, and the lower driven step chain sprocket 4 is connected through the step 5. The upper drive step chain sprocket 3 is configured to move in a predetermined direction in synchronization with the rotation of the upper drive step chain sprocket 3. As can be seen from a comparison with FIG. 2 showing a general escalator, the difference is that a plurality of steps are composed of a normal step 6 and at least one inspection step 10. As shown in the perspective view of FIG. 7, the normal step 6 includes a riser 6a, a frame body 6b, and a step board 6c.
[0008]
On the other hand, the inspection step 10 is configured as shown in FIG. 8 which is a front view and FIG. 9 which is a bottom view. When viewed from the surface side of the step board 6c located at the top of FIG. 8, it is almost the same as the normal step 6, but differs in that it has a pair of insertion holes 13 into which the operation body 12 can be inserted at the center. ing.
[0009]
Unlike the normal step 6 on the back side of the step board 6c, the lower support 15 is fixed to the back side of the step board 6c. A link mechanism 14 including a rotating member 21 that rotates when the operating body 12 inserted into the insertion hole 13 is rotated by a predetermined angle is configured on the back surface of the lower support 15. Is supported by the lower support 15 so as to be movable. That is, the end guide members 16a and 16b are fixed to the left and right ends of the lower support 15, respectively, and the center guide member 18a that forms a pair with the end guide members 16a and 16b at the center of the lower support 15, respectively. , 18b are fixed, and the tread-side engaging member is formed in a rod shape having a stepped portion in a hole formed on the same axis of each of the end guide members 16a, 16b and the central guide members 18a, 18b. Both ends of 17a and 17b are movably inserted, and are held so as to move in the axial direction only within a range regulated by the stepped portion.
[0010]
Springs 30a and 30b are respectively interposed between the step portions of the central guide members 18a and 18b and the tread board side engaging members 17a and 17b. In the steady state, the springs 30a and 30b include the tread board side engaging members 17a and 17b. The link mechanism 14 is maintained in a linearly extended state. On the tip side of the end guide members 16a and 16b, tread-side positioning members 19a and 19b are respectively attached at positions where they do not interfere with the axial operation of the tread-side engaging members 17a and 17b. 19b, positioning pins 24a and 24b are fixed downward. A pair of such mechanisms centering on the link mechanism 14 is configured as can be seen from FIG.
[0011]
The step board 6 c provided with the link mechanism 14 and the lower support 15 described above is mounted on the frame body 6 b of the inspection step 10. Frame body side engaging members 20a and 20b each having a hole on the operation axis of the tread board side engaging members 17a and 17b are fixed to both ends of the lower portion of the frame body 6b. In the illustrated steady state in which the tread-side engaging members 17a and 17b are inserted into the holes 20b, the tread plate 6a cannot be moved upward and separated from the frame body 6b. Frame body side positioning members 23a and 23b are provided at positions facing the tread plate side positioning members 19a and 19b in the frame body side engaging members 20a and 20b, and the positioning pins 23 of the frame body side positioning members 23a and 23b are provided on the positioning pins 23. A through hole is formed at the corresponding position.
[0012]
The rotating member 21 is rotated by a predetermined angle by the operating body 12, and the positioning pins 24a and 24b of the tread board side positioning members 19a and 19b are framed in a state where the front end portions of the tread board side engaging members 17a and 17b in the link mechanism 14 are retracted. When the tread plate 6c is mounted on the frame body 6b while being inserted into the through holes of the body side positioning members 23a and 23b, the positions where the tips of the rod-like members 17a and 17b can be inserted into the holes formed in the frame body engaging members 20a and 20b It becomes a relationship. When the rotating member 21 is rotated by a predetermined angle by the operating body 12 in this state, the tread plate side engaging members 17a and 17b of the link mechanism 14 are linearly extended, and the tip ends thereof are holes of the frame side engaging members 20a and 20b. The tread board 6c inserted into the frame 6b and mounted on the frame body 6b is mechanically connected to the outside frame 6b.
[0013]
Next, a procedure for performing maintenance work in the truss will be described.
First, the inspection step 10 is moved to the forward side as shown in FIG. 1, the operating body 12 is inserted into the insertion hole 13 formed in the tread plate 6c, and the rotating member 21 is rotated by a predetermined angle. Then, the front end portions of the tread board side engaging members 17a and 17b of the link mechanism 14 are retracted and come out of the insertion holes provided in the frame body side engaging members 20a and 20b. In this state, the mechanical connection between the step board 6c and the frame body 6b is released, so that the step board 6c can be separated from the frame body 6b by lifting the operating body 12 or the like. Since the opening is exposed by removing the tread plate 6c, the maintenance work in the truss can be performed efficiently from the opening.
[0014]
As described above, since the step board 6c is completely separated from the frame body 6b, the operator can move the step group while standing behind the inspection step 10 having the opening, and can safely move in the truss. Equipment maintenance such as continuous observation can be performed.
[0015]
FIG. 3 is a side view showing a passenger conveyor according to another embodiment of the present invention.
In this passenger conveyor, when a plurality of the above-described inspection steps 10 are arranged in a plurality of steps connected endlessly and the inspection step 10a is positioned on the forward side, another inspection step 10b is provided on the lower return side. It arrange | positions at predetermined intervals so that it may be located.
[0016]
According to such a passenger conveyor, when the step group is driven while sequentially removing the step plates 6c of the inspection steps 10a and 10b on the forward side, as shown in FIG. 3, from the opening of the inspection step 10a on the forward side, It is possible to obtain a positional relationship in which the truss bottom plate can be visually observed through the opening of another inspection step 10b located on the return side of. At this time, the presence / absence and accumulation level of dust accumulated on the truss bottom plate can be confirmed, and when it is determined that dust removal work is necessary, the worker enters from the opening of the inspection step 10a on the outgoing side. Remove the dust. Further, as described above, when the inspection step 10a and another inspection step 10b are positioned on the forward side and the lower return side, respectively, maintenance work for the devices in the truss in the vicinity from the opening of the inspection step 10a. When performing, the worker can place his / her feet on the truss bottom plate through the opening of another inspection step 10b, so that the worker can work in a stable posture.
[0017]
FIG. 4 is a side view showing a passenger conveyor according to still another embodiment of the present invention.
In this passenger conveyor, when a plurality of the above-described inspection steps 10 are arranged in a plurality of steps connected endlessly, and the inspection step 10a is located at the forward terminal, another inspection step is provided at the return-side terminal below it. They are arranged at predetermined intervals so that the steps 10 are located.
[0018]
According to the passenger conveyor having such a configuration, when the step group is driven while sequentially removing the step plates 6c of the two inspection steps 10a and 10b on the forward side, the inspection step 10a is provided at the forward side terminal as shown in FIG. When positioned, another inspection step 10b is positioned at the lower return side terminal, and the truss bottom plate at the terminal portion passes through the opening of the return side inspection step 10b from the opening of the return side inspection step 10a. Will be visible. Dust is most easily accumulated on the truss bottom plate in the terminal portion, and the necessity of cleaning work can be judged by visually confirming the same portion. Moreover, this confirmation operation can be easily performed by removing only the tread boards 6c of the two inspection steps 10a and 10b.
[0019]
FIG. 5 is a side view showing a passenger conveyor according to still another embodiment of the present invention.
The passenger conveyor in this embodiment forms an endless step group by alternately connecting the normal steps 6 and the above-described inspection steps 10 one by one. When the step group is driven while the step plates 6c of all the inspection steps 10 are sequentially removed on the outward side, when the outward inspection step 10a is positioned as shown in FIG. 5, the inspection step 10b is located on the return side below it. The truss bottom plate is almost entirely visible from the opening of the return-side inspection step 10b through the opening of the return-side inspection step 10b. A cleaning operation can be performed after judging the necessity of overall cleaning of the truss bottom plate by this visual observation.
[0020]
At the time of this cleaning work, there is no opening in the portion corresponding to the normal step 6 located between the inspection steps 10b, so it may be an obstacle to the cleaning operation, but from the inspection step 10b located above, For example, dust can be moved and removed to the inspection step 10b side adjacent to the lower portion using a broom. Further, since the normal step 6 connected to the rear side of the forward inspection step 10a has no opening, the worker can easily move while using the normal step 6. In addition, if the step group is moved due to a problem that the cause is not known, there is a risk of damaging the equipment, so that it is impossible to move the step group. Therefore, it is possible to easily inspect the equipment in the truss by removing the treads 6c of the desired steps 10a and 10b for inspection, and if necessary, restore work from the opening obtained by removing the treads 6c. be able to.
[0021]
FIG. 6 is a side view showing a passenger conveyor according to still another embodiment of the present invention.
The passenger conveyor according to this embodiment is composed of all the steps in the inspection step 10, and the step plate 6c of the inspection step 10 is sequentially removed at intervals of one sheet on the forward side as described in FIG. The same effect as a passenger conveyor can be obtained. In addition, if the step group is moved due to a problem whose cause is unknown, there is a risk of damaging the equipment and the step group cannot be moved. Therefore, the inspection step 10 is always continuously located on the outgoing side. Therefore, it is possible to easily inspect the equipment in the truss by removing the tread 6c of the desired inspection step 10, and if necessary, the restoration work of the equipment in the truss from the opening obtained by removing the tread 6c can be performed. .
[0022]
FIG. 10 is an enlarged front view showing the connecting portion between the inspection step 10 and the step chain 5 described above.
The frame 6b of the inspection step 10 is formed with a pair of holding members 31a and 31b that are opposed to each other with a predetermined distance and that have through holes 30a and 30b on the same axis, respectively, and the holding members 31a and 31b. The frame 6b and the step chain 5 are connected to each other by a bolt 25 that restricts movement therebetween. The bolt 25 has a hexagonal hole 25a at the top, a groove 25b cut in the circumferential direction at an intermediate portion in the axial direction, and a male screw portion 25c at the lower end. As shown in FIG. 10, a stop member 26 having an outer diameter larger than the diameter of the through hole 30a of the holding member 31a is fitted into the groove 25b as shown in FIG. 11, and the male screw portion 25c is passed through the holding member 31b. The washer 26 having a diameter larger than that of the hole 30b is inserted so as not to drop off, and the male screw portion 25c is screwed into the step chain 5 while turning the hexagon wrench 27 fitted in the hexagon hole 25a shown in FIG.
[0023]
As described above, the tread 6c is removed from the inspection step 10 to form an opening, and maintenance work in the truss is performed from this opening, but an opening larger than the opening obtained by removing the tread 6c is necessary. For example, when an operator enters from here, the following work is performed.
[0024]
First, as shown in FIG. 10, the hexagon wrench 27 is inserted from the through hole 30 a of the frame body 6 b and fitted into the hexagon hole 25 a of the bolt 25, and the bolt 25 is loosened and removed while turning the hexagon wrench 27. Then, the connection between the frame body 6b and the step chain 5 is released, and the frame body 6b can be removed. Therefore, a large opening can be obtained as compared with the case where only the tread board 6c is removed, and the maintenance work for the equipment in the truss can be performed using this large opening.
[0025]
Further, the bolt 25 is attached with a stop member 26 in consideration of the following points. That is, as shown in FIG. 13, the stopper member 26 is fitted in the groove 25 b provided in the axially intermediate portion of the bolt 25, and the male screw portion 25 c of the bolt 25 is completely detached from the step chain 5. The position of the stop member 26 is set so that the stop member 26 contacts the lower surface of the holding member 31a. Further, even when the frame body 6b is separated from the step chain 5, the bolt 25 moves downward due to its own weight. However, when the washer 27 restricts the lower end as shown in FIG. 10, the head penetrates the holding member 31a. It is located in the hole 30a. For this reason, even if the bolt 25 is turned to separate the frame body 6b from the step chain 5, the bolt 25 does not come out from between the holding members 31a and 31b by the stop member 26, and the bolt 25 can be prevented from being lost. .
[0026]
Since the bolt 25 is configured as described above, when the male screw portion 25c is not sufficiently tightened to the step chain 5 as shown in FIG. 12, it protrudes from the through hole 30a of the holding member 31a. Therefore, when the frame 6b of the inspection step 10 is fixed to the step chain 5 with the bolt 25, if the bolt 25 is not sufficiently tightened, the head of the bolt 25 protrudes from the through hole 30a of the holding member 31a. Since the tread board 6c cannot be attached, it is very easily understood that the bolts 25 are insufficiently tightened. In this way, whether or not the tread plate 6c can be attached can determine whether or not the tightening state of the bolt 25 is good, and insufficient tightening of the bolt 25 can be reliably prevented.
[0027]
Moreover, the length of the head of the bolt 25 is such that the head of the bolt 25 substantially contacts the lower surface of the tread 6c when the tread 6c is arranged at a predetermined fixing position of the frame 6b as shown in FIG. Since it is located in the through hole 30a of the holding member 31a, even if the bolt 25 is loosened, the head of the bolt 25 abuts against the tread plate 6c and is regulated to prevent further loosening, It is possible to prevent the inspection step 10 from being separated from the step chain 5 and falling off during operation of the escalator.
[0028]
【The invention's effect】
As described above, according to the passenger conveyor of the present invention, at least one inspection step is provided in the step group, and the connection between the frame body and the step plate is released on the back surface of the inspection step from the front side. Since it is configured to be removable, the opening can be obtained by the tread that has been disconnected, and maintenance work in the truss of the passenger conveyor can be easily and efficiently performed from this opening, It is possible to realize a reduction in labor and a reduction in work time. Also, by removing the bolts and releasing the connection between the frame and the step chain, the frame can also be removed, and a larger opening can be obtained. Maintenance work can be performed.
[Brief description of the drawings]
FIG. 1 is a side view of a passenger conveyor according to an embodiment of the present invention.
FIG. 2 is a side view of a general passenger conveyor.
FIG. 3 is a side view of a passenger conveyor according to another embodiment of the present invention.
FIG. 4 is a side view of a passenger conveyor according to still another embodiment of the present invention.
FIG. 5 is a side view of a passenger conveyor according to still another embodiment of the present invention.
FIG. 6 is a side view of a passenger conveyor according to still another embodiment of the present invention.
7 is a perspective view showing a normal step of the passenger conveyor shown in FIG. 1. FIG.
FIG. 8 is a front view showing an inspection step for the passenger conveyor shown in FIG. 1;
9 is a rear view of the inspection step shown in FIG. 8. FIG.
10 is an enlarged longitudinal sectional view showing a main part of an inspection step in the passenger conveyor shown in FIG. 1. FIG.
11 is a front view showing a bolt of the inspection step shown in FIG.
12 is a longitudinal sectional view showing a different state of the main part of the inspection step shown in FIG.
13 is a longitudinal sectional view showing another different state of the main part of the inspection step shown in FIG.
[Explanation of symbols]
3 Upper drive step chain sprocket 4 Lower driven step chain sprocket 5 Step chain 6 Step 6b Frame body 6c Step plate 10 Inspection step 10a Forward side inspection step 10b Return side inspection step 12 Operating body 15 Lower support 16a, 16b End guide members 17a, 17b Step side engaging members 18a, 18b Center guide members 19a, 19b Step board side positioning members 20a, 20b Frame body side engaging members 21 Rotating members 23a, 23b Frame body side positioning members 24a, 24b Positioning pins 25 Bolt 25a Groove 26 Stopping member 27 Washer 30a, 30b Through hole 31a, 31b Holding member

Claims (7)

  A step group is formed by connecting a plurality of steps to form a forward side and a return side below it, and at least one of the step groups is configured as an inspection step with a step plate attached to a frame, and the above steps In the passenger conveyor configured to be connected to and driven by a step chain wound around a driving and driven step chain sprocket, the inspection step is disposed on the back surface of the step plate and the surface of the step plate A step-side engaging member that protrudes and retreats when operated from the side, and a frame-side engaging member that is provided on the frame so as to be engaged by the protrusion of the step-side engaging member. The step board is detachably connected, and the connection between the inspection step and the step chain is arranged to be opposed to the frame body of the inspection step at a predetermined distance, and a through hole is formed in the opposite portion. The support member is provided, the passenger conveyor, characterized in that connected by bolts to move the through hole of the holding member. 2. The screw according to claim 1 , wherein the bolt is screwed into the step chain with a head located in a through-hole of the holding member whose upper end is positioned upward in a state of being screwed to the step chain. And a stop member for restricting the lower end portion of the lower end portion from coming out of the through hole of the holding member in a state where the lower end portion is released. The bolt according to claim 2 , wherein the bolt has a circumferential groove at an axially intermediate portion thereof, and the stop member has an outer diameter larger than the diameter of the through hole of the holding member located above the groove. Passenger conveyor characterized by having fitted. In those claims 1 Symbol placement, the inspection-use step is a passenger conveyor, characterized in that plurality at intervals respectively located above the forward side and the return side of the underlying in the step group. In those claims 1 Symbol placement, the inspection-use step at intervals respectively located forward side of the forward side and the return side of the inverted portion near the terminal and the return side of the underlying in the step group A passenger conveyor characterized by a plurality of passenger conveyors. In those claims 1 Symbol placement, the step group is a passenger conveyor, characterized in that the normal footstep and the inspection-use step connected alternately disposed one by one. In those claims 1 Symbol placement, the step group is a passenger conveyor, characterized by being configured by connecting only the steps for the inspection.

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