WO2022208844A1

WO2022208844A1 - Drive chain replacement jig

Info

Publication number: WO2022208844A1
Application number: PCT/JP2021/014167
Authority: WO
Inventors: 正彦一色; 知至中村
Original assignee: 三菱電機ビルテクノサービス株式会社
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2022-10-06
Also published as: JP7475538B2; JPWO2022208844A1; CN117412917A; KR20230162688A

Abstract

Provided is a drive chain replacement jig (30) that is used when replacing a drive chain (18) wound around a main sprocket (22) of an elevator (10), and that comprises an insertion tool (40) which is inserted between the main sprocket (22) and the drive chain (18) and which causes the drive chain (18) to be lifted from the main sprocket (22). The insertion tool (40) has a plurality of straight pieces (41) that are connected, adjacent straight pieces (41) are configured in an arc shape along the periphery of the main sprocket (22) by forming a prescribed angle with one another, the length of the straight pieces (41) spans the plurality of teeth of the main sprocket (22), and the straight pieces (41) have an upper side recess (42) which is provided on the upper surface side and which is where the drive chain (18) can slide, and a lower side recess (43) which is provided on the bottom surface side and which is where the teeth of the main sprocket (22) can slide.

Description

Drive chain replacement jig

The present invention relates to a drive chain replacement jig used when replacing a drive chain wound around a main sprocket of a passenger conveyor.

In an escalator, which is one of the passenger conveyors, a drive chain is wound around a drive sprocket provided on the output shaft of the drive device and a main sprocket provided on the main shaft that rotates the step chain to which the steps are connected ( For example, Patent Document 1).

In escalator maintenance and inspection work, the above-mentioned drive chain is replaced from the old chain to the new chain. When replacing the drive chain, the new chain is connected to the old chain and the drive device is manually operated to feed the new chain onto the main sprocket, wind the new chain around the main sprocket, and remove the old chain from the main sprocket. ing.

JP 2008-143677 A

However, the drive chain replacement work described above is work to replace a large chain in a narrow work space. It is done by In other words, the work of replacing the drive chain required at least three workers, resulting in poor work efficiency.

An object of the present invention is to provide a drive chain replacement jig that allows a single operator to efficiently replace the drive chain of a passenger conveyor.

A drive chain replacement jig according to the present invention is a drive chain replacement jig used when replacing a drive chain that is wound around a main sprocket of a passenger conveyor, and is a drive chain replacement jig that is used between the main sprocket and the drive chain. An insert is provided to float the drive chain from the main sprocket by being inserted, the insert having a plurality of continuous straight pieces, adjacent straight pieces forming a predetermined angle so as to be attached to the periphery of the main sprocket. The linear piece has a length spanning a plurality of teeth of the main sprocket, and is provided on the upper surface side and in which the drive chain can slide, and is provided on the bottom surface side. and a lower recess in which the teeth of the main sprocket can slide.

In the drive chain replacement jig according to the present invention, the recovery part is placed on the floor below the main sprocket and recovers the drive chain removed from the main sprocket, and has an elongated shape along the drive chain. It is preferable to further include a receiving tray having a guide portion provided at one end of the portion and guiding the drive chain to the recovery portion.

In the drive chain replacement jig according to the present invention, the lower recessed portion protrudes from the upper recessed portion on the tip end side of the inserting direction of the inserting tool, and the tip of the lower recessed portion is formed in an arc shape of the inserting tool. is preferably formed at an acute angle with respect to the radial direction of the

According to the drive chain replacement jig according to the present invention, the drive chain of the passenger conveyor can be efficiently replaced by one worker.

1 is a schematic diagram showing an escalator according to an embodiment; FIG. 1 is a side view showing a drive chain replacement jig that is an example of an embodiment; FIG. Fig. 10 is a side view of the insert; FIG. 4 is a cross-sectional view taken along line AA of FIG. 3; It is a perspective view which shows a saucer. FIG. 4 is a diagram illustrating a drive chain replacement operation using a drive chain replacement jig that is an example of an embodiment; FIG. 7 is a diagram illustrating a continuation of FIG. 6; FIG. 8 is a diagram illustrating a continuation of FIG. 7;

An example of an embodiment of the present invention will be described in detail below. In the following description, specific shapes, materials, directions, numerical values, etc. are examples for facilitating understanding of the present invention, and can be appropriately changed according to usage, purpose, specifications, and the like.

An escalator 10 as a passenger conveyor according to an embodiment will be described using FIG. FIG. 1 is a schematic diagram showing an escalator 10. As shown in FIG.

The escalator 10 as a passenger conveyor is a staircase-like lifting device that allows users to move to each floor of the building. The escalator 10 consists of a main frame 11 that spans between adjacent floors and supports the weight of the escalator 10 and a load, and an upper machine that is provided under the floor of an upper entrance 12 on the upper floor side of the main frame 11. A room 13 and a lower machine room 15 provided under the floor of a lower entrance/exit 14 on the lower floor side of the main frame 11 .

In the escalator 10, driving force of a drive device 16 housed in an upper machine room 13 is transmitted to a main shaft 17 and a main sprocket 22 by a drive chain 18, and a step chain 19 is rotated by the main shaft 17, thereby allowing the step 20 to be used for getting on and off the upper part of the escalator. It is moved (lifted/lowered) between the opening 12 and the lower entrance/exit 14 .

A driving sprocket 21 is provided on the output shaft of the driving device 16 . The main shaft 17 is rotatably provided in the upper machine room 13 and arranged with its axial direction in the frontage direction of the main frame 11 . The main shaft 17 is provided with a main sprocket 22 that rotates in conjunction with the main shaft 17 . The drive chain 18 is wound around the drive sprocket 21 and the main sprocket 22 and transmits the driving force of the drive device 16 to the main shaft 17 via the main sprocket 22 .

The main shaft 17 is further provided with an upper step sprocket 23 that rotates in conjunction with the main shaft 17 . The step chain 19 is an endless chain that is wound around the upper step sprocket 23 and the lower step sprocket 24 housed in the lower machine room 15 and driven by the driving force of the driving device 16 . The steps 20 are provided on respective step shafts (not shown) attached to the step chain 19 at regular intervals, and circulate between the upper entrance 12 and the lower entrance 14 as the step chain 19 moves.

The escalator 10 includes balustrades 25 erected on both sides of the main frame 11, endless moving handrails 26 supported by the balustrades 25 and circulating between the upper entrance 12 and the lower entrance 14, and a driving device. A moving handrail driving device 27 that drives the moving handrail 26 by the driving force of 16 and a control panel 28 that is housed in the upper machine room 13 and controls each device of the escalator 10 is further provided.

A drive chain replacement jig 30, which is an example of an embodiment, will be described with reference to FIG. FIG. 2 is a side view showing the drive chain replacement jig 30 during replacement work of the drive chain 18. As shown in FIG.

In the escalator 10, the drive chain 18 is wound around the drive sprocket 21 provided on the output shaft of the drive device 16 and the main sprocket 22 provided on the main shaft 17 as described above. In the maintenance and inspection work of the escalator 10, the work of replacing the drive chain 18 using the drive chain replacement jig 30 is performed.

The drive chain replacement jig 30 is a jig used when replacing the old drive chain 18 (hereinafter referred to as the old chain 18) with the new drive chain 118 (hereinafter referred to as the new chain 118) as described above. According to the drive chain replacement jig 30, the old chain 18 can be efficiently replaced with the new chain 118 by one worker, although the details will be described later.

The drive chain replacement jig 30 includes an insert 40 that is inserted between the main sprocket 22 and the old chain 18 to float the old chain 18 from the main sprocket 22, and is placed on the floor below the main sprocket 22. and a guide string 60 connecting one end of the cut old chain 18 and the other end of the new chain 118 .

The insert 40 will be described with reference to FIGS. 3 and 4. FIG. FIG. 3 is a side view showing the insert 40. FIG. 4 is a cross-sectional view taken along line AA of FIG. 3. FIG.

As described above, the insert 40 is a jig that is inserted between the main sprocket 22 and the old chain 18 when replacing the old chain 18 with the new chain 118 to lift the old chain 18 from the main sprocket 22. .

Also, the insert 40 is a jig for sliding the main sprocket 22 and the old chain 18 after the old chain 18 is lifted from the main sprocket 22 . Further, the insertion tool 40 is a jig for sliding the main sprocket 22 and the new chain 118 respectively in order to feed the new chain 118 to the main sprocket 22 after the old chain 18 is recovered from the main sprocket 22 .

With the insert 40, the old chain 18 can be easily removed from the main sprocket 22. Also, after removing the old chain 18 from the main sprocket 22, the old chain 18 can be smoothly collected and the new chain 118 can be smoothly fed.

The insert 40 has a plurality of continuous straight pieces 41 . The insert 40 is formed in an arc shape along the periphery of the main sprocket 22 by forming a predetermined angle between the adjacent linear pieces 41 . The length of the insert 40 is preferably about 1/3 of the circumference of the main sprocket 22 .

The straight piece 41 has a length that spans a plurality of teeth 22A (three teeth 22A in this example) of the main sprocket 22 when along the periphery of the main sprocket 22, and is provided on the upper surface side and is attached to the old chain. It has an upper recess 42 in which the sprocket 18 can slide, and a lower recess 43 provided on the bottom side and in which the tooth portion 22A of the main sprocket 22 can slide.

The upper concave portion 42 is formed in a concave shape whose upper side is depressed in a cross-sectional view perpendicular to the direction in which the insertion tool 40 is inserted (hereinafter referred to as the insertion direction). In this example, the plurality of upper concave portions 42 are one continuous member formed by bending an aluminum plate. The plurality of upper concave portions 42 are not limited to this example, and may be configured such that divided members are rotatably connected by hinges.

The lower recessed portion 43 is formed in a recessed shape with its lower side depressed in a cross-sectional view perpendicular to the insertion direction. In this example, the plurality of lower concave portions 43 are each divided members and formed of resin.

In the straight piece 41 on the tip end side in the insertion direction, a lower recessed portion 43 is formed so as to protrude more than the upper recessed portion 42 when viewed in the axial direction. It is formed at an acute angle with respect to the radial direction. As a result, when inserting the insert 40 between the main sprocket 22 and the old chain 18, the lower recessed portion 43 is inserted before the upper recessed portion 42, and the insert 40 can be removed without requiring a strong force. It can be inserted smoothly.

A fixing portion 44 for fixing the insertion tool 40 to the main sprocket 22 is provided on the straight piece 41 on the proximal end side in the insertion direction. In this example, the fixing portion 44 is configured such that a wing bolt is axially screwed thereon, and the insert 40 is fixed to the main sprocket 22 by pressing the tip of the wing bolt against the main sprocket 22 .

The saucer 50 will be explained using FIG. FIG. 5 is a perspective view showing the tray 50. FIG.

The receiving tray 50 is a member that is placed on the floor (truss oil pan) below the main sprocket 22 and collects the old chain 18 that is removed from the main sprocket 22 when the old chain 18 is replaced with the new chain 118.

The receiving tray 50 includes a container-like recovery portion 51 having an elongated shape along the old chain 18 , and a guide provided at the end of the recovery portion 51 for guiding the old chain 18 removed from the main sprocket 22 to the recovery portion 51 . and a portion 52 .

The size of the recovery part 51 in the insertion direction is preferably sufficiently larger than the outer diameter of the main sprocket 22 . In addition, it is preferable that the size of the collecting portion 51 in the width direction (axial direction) is large enough to bundle and collect the old chain 18 . It is preferable that the recovery section 51 is surrounded on all four sides by walls 51A.

According to the collecting section 51, the old chain 18 removed from the main sprocket 22 can be collected. Also, when attaching the new chain 118 to the main sprocket 22, the new chain 118 is sent to the main sprocket 22, and after the new chain 118 passes through the insert 40, the new chain 118 falls into the truss oil pan. can be prevented (see FIG. 8(A)). As a result, it is possible to prevent oil, dust, etc. from the truss oil pan from adhering to the new chain 118 .

The guide part 52 is formed on the tip end side of the insertion direction of the collection part 51 and extends upward toward the tip end side. The guide portion 52 can guide the old chain 18 removed from the main sprocket 22 to be stored in the recovery portion 51 when it slides on the insert 40 and falls downward. .

A replacement operation for replacing the drive chain 18 from the old chain 18 to the new chain 118 using the drive chain replacement jig 30 will be described with reference to FIGS. Below, the front side and the back side when the main sprocket 22 is viewed from the drive sprocket 21 will be described.

First, the joint portion of the old chain 18 (the joint where the endless chain can be separated) is moved to the upper part between the main sprocket 22 and the drive sprocket 21 . Next, the drive 16 and drive sprocket 21 are slightly moved toward the main sprocket 22 to loosen the tension on the old chain 18 .

As shown in FIG. 6(A), the joint portion of the old chain 18 is separated, and a guide string 60 is connected to one end of the old chain 18. Also, the tray 50 is placed on the floor below the main sprocket 22 . At this time, the tray 50 is placed so that the guide portion 52 is positioned below the rear end portion of the main sprocket 22 .

As shown in FIG. 6(B), the other end of the old chain 18 wound around the drive sprocket 21 is removed by hand. Next, the tray 50 from which the other end side of the old chain 18 has been recovered is moved further toward the inner side of the main sprocket 22 . At this time, the engagement of the old chain 18 on the lower portion of the main sprocket 22 is removed and the old chain 18 is collected in the tray 50 .

As shown in FIG. 7(A), the insert 40 is inserted between the main sprocket 22 and the old chain 18 from the front side with respect to the old chain 18 meshing with the upper part of the main sprocket 22 .

As shown in FIG. 7(B), the insertion tool 40 inserted between the main sprocket 22 and the old chain 18 is advanced until the tip of the insertion tool 40 is positioned on the far side of the main sprocket 22, and fixed. A portion 44 secures the insert 40 to the main sprocket 22 . As a result, the old chain 18 meshing with the upper portion of the main sprocket 22 is removed from the main sprocket 22. - 特許庁

Next, the saucer 50 is moved forward until the guide part 52 is located below the back end of the main sprocket 22 and contacts the old chain 18 hanging down from the main sprocket 22 . As a result, the old chain 18, which is no longer engaged with the main sprocket 22, drops by its own weight, slides on the upper concave portion 42 of the insert 40, is guided by the guide portion 52, and is housed in the tray 50.例文帳に追加At this time, the guide string 60 connected to the old chain 18 is guided by the old chain 18 and moves onto the upper concave portion 42 of the insert 40 .

As shown in FIG. 8(A), the old chain 18 is completely recovered, the new chain 118 is connected to the other end of the guide string 60 that has moved onto the upper concave portion 42 of the insert 40, and the new chain 118 is attached. It is fed into the main sprocket 22 along the upper recess 42 of the insert 40 . At this time, the guide string 60 is pushed into the new chain 118 and moves below the main sprocket 22 from the rear end of the main sprocket 22 . Then, the leading end of the new chain 118 reaches the tray 50 and the guide string 60 is pulled forward from below the main sprocket 22 to draw the new chain 118 forward.

As shown in FIG. 8(B), the insert 40 is pulled out to the front side, and the new chain 118 is meshed with the main sprocket 22. Next, the guide string 60 is removed from the new chain 118, the new chain 118 is meshed with the drive sprocket 21, and the joint part is connected at the upper part between the main sprocket 22 and the drive sprocket 21. Next, the tray 50 is removed, the driving device 16 and the driving sprocket 21 are moved away from the main sprocket 22, tension is applied to the new chain 118, and the replacement work is completed.

It should be noted that the present invention is not limited to the above-described embodiments and modifications thereof, and it goes without saying that various modifications and improvements are possible within the scope of the matters described in the claims of the present application. .

10 escalator, 11 main frame, 12 upper doorway, 13 upper machine room, 14 lower doorway, 15 lower machine room, 16 drive unit, 17 main shaft, 18 drive chain (old chain), 19 step chain, 20 step, 21 Drive sprocket, 22 main sprocket, 22A teeth, 23 upper step sprocket, 24 lower step sprocket, 25 handrail, 26 moving handrail, 27 moving handrail drive device, 28 control panel, 30 drive chain replacement jig, 40 insert , 41 straight piece, 42 upper concave portion, 43 lower concave portion, 44 fixing portion, 50 saucer, 51 recovery portion, 52 guide portion, 60 guide string, 118 drive chain (new chain)

Claims

A drive chain replacement jig used when replacing a drive chain wound around a main sprocket of a passenger conveyor,
an insert inserted between the main sprocket and the drive chain to float the drive chain from the main sprocket;
The insertion tool has a plurality of continuous linear pieces, and the adjacent linear pieces form a predetermined angle with each other to form an arc along the peripheral edge of the main sprocket,
The linear piece has a length that spans a plurality of teeth of the main sprocket, and is provided on the upper surface side and in which the drive chain can slide. a lower recess in which the portion is slidable;
Drive chain replacement jig.
The drive chain replacement jig according to claim 1,
a recovery part placed on the floor below the main sprocket and recovering the drive chain removed from the main sprocket and having an elongated shape along the drive chain; and a recovery part provided at one end of the recovery part. and a guide portion that guides the drive chain to the recovery portion.
Drive chain replacement jig.
The drive chain replacement jig according to claim 1 or 2,
The lower concave portion protrudes from the upper concave portion on the tip end side of the inserting tool in the inserting direction,
the tip of the lower recess is formed at an acute angle with respect to the radial direction of the arc of the insert,
Drive chain replacement jig.