JP2022028098A - Tension adjustment device - Google Patents

Abstract

To provide a tension adjustment device of a movable hand rail which can maintain an optimal pressing force for a long time and prevent damage when an impulsive force rapidly acts thereon when the device is driven.SOLUTION: A tension adjustment device includes: a substrate fixed to a frame; rollers which contact with a movable hand rail; a roller support member which supports the rollers in a manner that the rollers protrude in a horizontal direction and which can move in a vertical direction relative to the substrate; biasing members which bias the roller support member downward with predetermined biasing force; and lock mechanisms each having an engaged part provided at the substrate and an engaging part provided at the roller support member. The roller support member has a swing supporting point where the engaging part may swing to the substrate side between the engaging part and the roller. When the roller support member receives an upward force exceeding the biasing force of the biasing member from the roller, the roller support member swings relative to the swing supporting point and the engaging part engages with the engaged part to lock movement of the roller support member.SELECTED DRAWING: Figure 2

Description

An embodiment of the present invention relates to a tension adjusting device for adjusting the tension of a moving handrail.

Generally, in a passenger conveyor such as an escalator or an autoload, a tension adjusting device for adjusting the tension of a moving handrail is known.
In such a tension adjusting device, there is a device that constantly applies a pressing force to a moving handrail to apply tension and notifies when a predetermined tension range is exceeded. Then, when the tension exceeds a predetermined range, maintenance is performed such that the tension adjusting device is reset.
On the other hand, when a force applied in the opposite direction to the traveling direction is applied to the moving handrail due to a load or mischief applied when the passenger puts his / her hand on the handrail, a sudden impact force (reaction force) is generated and the tension adjusting device is damaged. There was a risk. Damage to the tension regulator requires maintenance.
Further, if the pressing force applied to the moving handrail is too small, there is a disadvantage that the moving handrail is slackened, bent, or rubbed against the guide rail that guides the moving handrail, resulting in severe wear.
Therefore, there is a problem that it takes time and effort to reset the pressing force of the tension adjusting device and to perform maintenance due to damage to the tension adjusting device.

Japanese Unexamined Patent Publication No. 2006-8388 Jikkai Sho 63-180688 Gazette

Under these circumstances, there is a demand for a tension adjusting device for a moving handrail that can maintain an optimum pressing force for a long period of time and can prevent damage when a sudden impact force is applied during driving.

Therefore, we provide a tension adjusting device for a moving handrail that can maintain an optimum pressing force for a long period of time and can prevent damage when a sudden impact force is applied during driving.

The tension adjusting device for the moving handrail according to the embodiment is a tension adjusting device for adjusting the tension of the moving handrail, which is arranged on an endless moving handrail provided on a passenger conveyor for transporting passengers, and is a substrate fixed to the skeleton. A roller that abuts on the moving handrail, a roller support member that supports the roller by projecting it in the horizontal direction and is movable in the vertical direction with respect to the substrate, and a predetermined roller support member that faces downward. It has an urging member urged by the urging force of the above, a locked portion provided on the substrate, and a locking portion provided on the roller support member, and the locking portion is locked to the locked portion. The roller support member is provided with a locking mechanism for limiting the movement of the roller support member, and the roller support member is capable of swinging the locking portion between the locking portion and the roller toward the substrate side. The roller support member swings with respect to the swing fulcrum when the roller support member receives an upward force exceeding the urging force of the urging member from the roller. The portion is locked to the locked portion.

In the passenger conveyor according to the first embodiment, it is a vertical cross section which shows roughly the whole driving device of a moving handrail. It is a front view of the tension adjusting apparatus shown in FIG. FIG. 3 is a perspective view of the tension adjusting device shown in FIG. 2 as viewed from diagonally below. FIG. 3 is an enlarged perspective view showing a lock mechanism of the tension adjusting device shown in FIG. 2 and a peripheral portion thereof. FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. It is sectional drawing explaining the operation of the tension adjusting apparatus, (a) is the figure when the lock mechanism locks, and (b) is the figure when the lock mechanism releases the lock. It is a tension adjusting apparatus which concerns on 2nd Embodiment, and is sectional drawing which shows the lock mechanism and its surroundings. It is sectional drawing which shows the modification of the locked part.

Hereinafter, the tension adjusting device and the passenger conveyor according to the embodiment will be described. First, the passenger conveyor provided with the tension adjusting device 7 according to the first embodiment will be described with reference to FIGS. 1 to 6.
The passenger conveyor is an escalator, and is installed at an angle between the upper floor and the lower floor of the building, for example.
As shown in FIG. 1, in the moving handrail driving device 1, the endless moving handrail 3 is circulated and driven in synchronization with the movement of a step (not shown) of the passenger conveyor.

In the moving handrail driving device 1, the moving handrail 3 is wound around the driving device 5a and sandwiched between the driving pulley 5b and the pressing roller 5c. By rotating the drive pulley 5b in a predetermined direction, the moving handrail 3 travels due to the frictional force between the drive pulley 5b and the moving handrail 3.
The moving handrail 3 has a C-shaped cross section, and is provided with a rubber main body and a canvas integrally provided with the main body, and a steel core wire is embedded in the main body. The portion where the C-shaped opening faces downward and the moving handrail 3 travels is referred to as the outward route side so that the passenger can hold the moving handrail 3. Further, the portion where the moving handrail 3 is inverted and the opening faces upward and the moving handrail 3 travels is referred to as a return route side.
The moving handrail 3 is driven along a guide rail (not shown). In FIG. 1, a guide rail is installed on the outward route side from the X portion to the Y portion counterclockwise in the figure.
A drive lower guide roller 5d and a drive upper guide roller 5e are installed in front of and behind the drive device 5a (front and back in the traveling direction of the moving handrail 3; the same applies hereinafter), and when the moving handrail 3 enters the drive device 5a. , It is designed to deform smoothly without bending at a steep angle. A slack removing portion 5f is provided at the lower portion of the moving handrail 3 on the return route side. A tension adjusting device 7 for adjusting the tension of the handrail 3 is provided in the slack removing portion 5f, and an appropriate tension is applied to the moving handrail 3 by applying a downward pressing force to the moving handrail 3 in FIG. Absorbs slack.
Before and after the slack removing portion 5f, a slack removing lower guide roller 5 g and a slack removing upper guide roller 5h are installed so that the moving handrail 3 can be smoothly deformed when entering the slack removing portion 5f. There is.
On the return side of the moving handrail 3, the space between the lower boarding / alighting deck 5j and the upper boarding / alighting deck 5k is covered with a cover 6.

Next, the tension adjusting device 7 according to the first embodiment will be described.
As shown in FIGS. 2 and 3, the tension adjusting device 7 can move up and down with respect to the substrate 9, the rollers 13 and 13 in contact with the moving handrail 3, and the roller support to support each roller 13. The member 15 includes urging members 19 and 19 that press the roller support member 15 against the substrate 9 with a predetermined pressing force, and lock mechanisms 17 and 17 that restrict the movement of the roller support member 15.

The substrate 9 is fixed to a truss member (frame: not shown) with fixing bolts 11 and 11.
As shown in FIG. 5, the substrate 9 is provided with a guide shaft 9a penetrating the roller support member 15 so as to project horizontally from the surface of the substrate 9. In the present embodiment, a total of two guide shafts 9a are provided at intervals in the moving direction (left-right direction in FIG. 1) of the moving handrail 3. A nut 12 is attached to each guide shaft 9a at a portion protruding from the roller support member 15, and the roller support member 15 is sandwiched between the substrate 9 and the nut 12.
Further, as shown in FIGS. 2 and 3, the substrate 9 guides the movement of the urging member end support portions 9b and 9b for supporting one end portion (upper end portion) of the urging member 19 and the roller support member 15. The guide portions 9c and 9c are integrally formed. The urging member one end support portions 9b and 9b and the guide portions 9c and 9c are projected in the projecting direction (horizontal direction) of the rollers 13 and 13, and the urging member one end support portions 9b and 9b are the upper ends of the substrate 9. On the side, a total of two are provided at intervals in the moving direction of the moving handrail 3 (horizontal direction in FIG. 2). The guide portions 9c and 9c are provided on the substrate 9 on the left and right end sides of the moving handrail 3 in the moving direction (left-right direction in FIG. 2).

The rollers 13 and 13 are provided side by side in the moving direction of the moving handrail 3 (horizontal direction in FIG. 2), and each roller 13 has the same configuration. It projects horizontally from the member 15 and is fixed to the roller support member 15.
In the rotating shaft 13b of each roller 13, the central portion 13c in the horizontal direction is a point of action of the force received from the moving handrail 3.

As shown in FIGS. 2 and 3, each guide shaft 9a of the substrate 9 is inserted into the roller support member 15, and each guide shaft 9a is relatively movable in the vertical direction. And the fixing bolt elongated holes 15c and 15c for preventing interference with the fixing bolts 11 and 11 are formed.
Further, the roller support member 15 is provided with the other end support portions 15d and 15d of the urging member that support the other end (lower end) of each of the above-mentioned urging members 19.
The roller support member 15 is formed with guided portions 15f and 15f facing the guide portions 9c and 9c of the substrate 9. A sliding plate 21 is interposed between each guided portion 15f and the guide portion 9c.

As shown in FIG. 5, on the back surface of the roller support member 15, a spacer 22 is provided between the substrate 9 and the roller support member 15, and a gap h is formed between the substrate 9 and the roller support member 15. are doing. Each of the guide shafts 9a described above penetrates the spacer 22, and the spacer 22 serves as a swing fulcrum P of the roller support member 15. The spacer 22 is configured by abutting the ends of the two disc springs 22a and 22b on the smaller radius side, respectively.
Since the spacer 22 is provided at two locations (see FIG. 1) corresponding to the guide shaft 9a, the roller support member 15 has the spacer 22 as the swing fulcrum P with respect to the gap h, and the spacer 22 is above and below the swing fulcrum P. The roller support member 15 is swingable in the direction of approaching or separating from the substrate 9 (see arrow M).

As shown in FIGS. 2 and 3, each urging member 19 is a coil spring, the upper end 19a is in contact with one end support portion 9b of the urging member of the substrate 9, and the lower end 19b is urging the roller support member 15. It is in contact with the other end support portion 15d of the member, and always urges the roller support member 15 downward with a predetermined pressing force against the substrate 9.
Each urging member 19 is used in a state where the spring constant as small as possible is compressed so that the load on the rollers 13 and 13 becomes substantially constant between the strokes of the long holes 15b for the guide shaft.
The outer peripheral surface of each urging member 19 is covered with a cover 23.

As shown in FIGS. 4 and 5, each of the locking mechanisms 17 and 17 is composed of a locked portion 17a provided on the substrate 9 and a locking portion 17b provided on the roller support member 15, and is locked. The portion 17b is locked to the locked portion 17a to limit the movement of the roller support member 15.
The locked portion 17a is a round bar having a threaded groove 24 formed on its peripheral surface, and is fixed to the substrate 9 by welding.
The locking portion 17b has a main body 26 having a substantially U-shaped vertical cross section, the lower end of the main body 26 is fixed to the roller support member 15 with screws 25, and the locked portion 17a is attached to the upper end of the main body 26. A claw 27 projecting to the side is formed. In the locking portion 17b, the claw 27 engages with and disengages from the screw groove 24 of the locked portion 17a.

The operation of the tension adjusting device 7 according to the present embodiment will be described.
First, the action of the force of each part will be described with reference to FIG.
The urging member 19 acts on the roller support member 15 with an urging force F1 downward with respect to the substrate 9. F1 is separated from the swing fulcrum P by a distance L1 in the horizontal direction, but acts on the roller support member 15 from the other end support portion 15d of the urging member at substantially the same position as the swing fulcrum P in the vertical direction. The rotational moment with respect to the swing fulcrum P is small and acts as a substantially downward force.
On the other hand, the reaction force F2 received by the roller 13 from the moving handrail 3 is separated from the swing fulcrum P by a distance L2 in the horizontal direction, and acts as an upward force at a position separated from the swing fulcrum P by a distance H in the vertical direction. It acts as a rotational moment with respect to the swing fulcrum P.
Further, in the horizontal direction, the urging force F1 of the urging member 19 acts between the swing fulcrum P and the reaction force F2 of the roller 13.

(When driving down the moving handrail 3)
As shown in FIG. 1, when the moving handrail 3 of the passenger conveyor is operated downward, a tension adjusting device 7 constantly applies a load to the moving handrail 3 of the passenger conveyor so that the tension of the moving handrail 3 is within a predetermined range. keeping.
Specifically, as shown in FIG. 2, the roller 13 applies tension to the moving handrail 3 by pressing the roller support member 15 against the substrate 9 with the urging force F1 by the urging member 19. .. The pressing force of the roller 13 can apply a substantially constant load to the expansion and contraction of the moving handrail 3 (expansion and contraction due to deterioration over time) if the free length of the spring as the urging member 19 to be used is made sufficiently long.
In the lock mechanism 17, the locking portion 17b is located at a position away from the locked portion 17a and is in the released state. Therefore, the roller support member 15 is in a state of being able to move up and down.

When the moving handrail 3 has normal expansion and contraction, the roller support member 15 moves upward or downward with respect to the substrate 9 together with the rollers 13 to apply a constant tension to the moving handrail 3.
On the other hand, when an overload acts on the tension adjusting device 7 via the moving handrail 3 by a passenger or the like during operation of the moving handrail, for example, when a passenger gets on or off the passenger conveyor, the moving handrail 3 is excessively loaded. A sudden overload may act on the moving handrail 3 due to mischief such as clinging or pulling the moving handrail 3.
In this case, as referred to in FIG. 6A, the roller 13 receives a reaction force F2 from the moving handrail 3 that exceeds the urging force F1 applied by the urging member 19, and reacts to the roller support member 15. It acts a force F2.

As shown in FIG. 6A, since the reaction force F2 acts as a rotational moment with respect to the swing fulcrum P (see FIG. 5), the lower end side of the roller support member 15 is separated from the substrate 9 and the upper end side is the substrate. It swings so as to press it against 9.
As a result, in the locking mechanism 17, a force F3 that pushes the locking portion 17b toward the locked portion 17a acts, and the claw 27 of the locking portion 17b provided at the upper end of the roller support member 15 is the upper end of the substrate 9. It is fitted into the screw groove 24 of the locked portion 17a fixed to the lock, and the vertical movement of the roller support member 15 is locked.

After that, as shown in FIG. 6B, when the sudden overload acting on the moving handrail 3 disappears or the driving of the moving handrail 3 is stopped, the reaction force F2 from the roller 13 is released and the roller is supported. When the member 15 receives the urging force F1 of the urging member 19, the urging force F1 is separated from the swing fulcrum P by the horizontal distance L1 (see FIG. 5), so that a slight rotational moment of the urging force F1 is generated. A force F4 that acts and separates the locking portion 17b from the locked portion 17a acts, the locking mechanism 17 is released, and the moving handrail 3 is returned to the initial state in which the urging force is applied by the urging member 19.

(When driving up the moving handrail 3)
In FIG. 1, when the moving handrail is operated in the direction opposite to the arrow, when a sudden overload acts on the moving handrail 3 on the outward route side, a force in the loosening direction acts on the moving handrail 3 in the tension adjusting device 7. During the operation shown in FIG. 6A, the reaction force acting on the roller 13 becomes a negative reaction force (a force in the direction opposite to F2 or a force of 0), and the lock mechanism 17 does not act. However, in this case, there is no problem because the drive upper guide roller 5e does not cause significant slack (see the broken line shown in FIG. 1).

The effect of the first embodiment will be described.
As shown in FIG. 5, according to the first embodiment, the roller support member 15 is provided so as to be vertically movable with respect to the substrate 9, and the urging member 19 is predetermined with the roller support member 15 facing downward. Since the urging force F1 is used for urging, the roller 13 supported by the roller support member 15 can apply a predetermined tension to the moving handrail.
As shown in FIG. 6A, when the roller 13 receives a reaction force F2 from the moving handrail 3 that exceeds the urging force F1 of the urging member 19, the roller supporting member 15 is placed between the locking portion 17b and the roller 13. The roller support member 15 is moved upward by swinging with respect to the swing fulcrum P provided in the above, locking the locking portion 17b with the locked portion 17a provided on the substrate 9, and operating the locking mechanism 17. It is blocked from moving to. As a result, the tension adjusting device 7 is damaged due to the roller support member 15 and the roller 13 moving more than necessary, and the moving handrail 3 due to the slack (see the broken line shown in FIG. 1) caused in the vicinity of the drive upper guide roller 5e. Can prevent damage.
As described above, according to the tension adjusting device according to the present embodiment, the optimum pressing force can be maintained for a long period of time, and damage can be prevented when a sudden impact force is applied during driving.

As shown in FIG. 5, the point of action of the urging force F1 of the urging member 19 is located between the swing fulcrum P and the point of action of the reaction force F2 that the roller 13 receives from the moving handrail 3. The roller support member 15 was swung with the reaction force F2 as a rotational moment with respect to the swing fulcrum P, the locking portion 17b was locked to the locked portion 17a to lock the lock mechanism 17, and the reaction force F2 was released. In this case, the locking portion 17b can be released from the locked portion 17a by the rotational moment when the urging force F1 acts on the swing fulcrum P, and the lock mechanism 17 can be automatically unlocked.
Since the locked portion 17a has a plurality of recesses provided side by side in the vertical direction formed by the screw groove 24 and the locking portion 17b is a claw 27 that enters the screw groove 24, a general-purpose product is used for the lock mechanism 17. It can be done and the configuration can be simplified.
Since the swing fulcrum P is composed of the spacer 22, the configuration is simple, and in the embodiment, the spacer 22 is used by stacking two disc springs, so that the configuration and manufacture are easy. be.
Since the substrate 9 has a guide portion 9c that penetrates the roller support member 15 and the guide portion 9c is provided so as to penetrate the spacer 22, the swing of the roller support member 15 can be easily guided.

Although other embodiments of the present invention will be described below, in the embodiments described below, details of the parts that have the same effects as those of the above-mentioned first embodiment are designated by the same reference numerals. In the following description, the main differences from the first embodiment will be described.
The second embodiment will be described with reference to FIG. 7.
In the second embodiment, in the tension adjusting device 7, the substrate 9 is provided with an urging member 31 for pressing the roller support member 15 that has swung above the swing fulcrum P, and the lock mechanism 17 is engaged with the urging member 31. Encourage the position to release from the stop position (lock position).

According to this second embodiment, in the locking mechanism 17, as shown in FIG. 6A, the reaction force F2 from the moving handrail 3 acts on the roller 13, and the locking mechanism 17 is locked by the swing of the roller support member 15. After the portion 17b is locked to the locked portion 17a, as shown in FIG. 6B, when the reaction force F2 is released, the roller is forcibly supported by the urging member 31 as shown in FIG. Since the member 15 returns to the initial position before swinging, the lock mechanism 17 can be reliably released.

The embodiments described above are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The embodiments and variations thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.
For example, the locked portion 17a of the lock mechanism 17 is not limited to the screw groove 24, and may be a rectangular unevenness 34 as shown in FIG.
Further, the locked portion 17a is not limited to a round bar, and may be a quadrangular prism having irregularities formed only on the surface facing the locking portion 17b.

1 ... Passenger conveyor, 3 ... Moving handrail, 7 ... Tension adjusting device, 9 ... Board, 13 ... Roller, 15 ... Roller support member, 17 ... Locking mechanism, 17a ... Locked part, 17b ... Locking part, 19 ... Bounce member, 22 ... Spacer, P ... Swing fulcrum, F1 ... Basis force of urging member, F2 ... Reaction force of moving handrail.

The tension adjusting device for the moving handrail according to the embodiment is a tension adjusting device for adjusting the tension of the moving handrail, which is arranged on an endless moving handrail provided on a passenger conveyor for transporting passengers, and is a substrate fixed to the skeleton. A roller that abuts on the moving handrail, a roller support member that supports the roller by projecting it in the horizontal direction and is movable in the vertical direction with respect to the substrate, and a roller support member that is predetermined to face downward. It has an urging member urged by the urging force of the above, a locked portion provided on the substrate, and a locking portion provided on the roller support member, and the locking portion is locked to the locked portion. The roller support member is provided with a locking mechanism for limiting the movement of the roller support member, and the roller support member is capable of swinging the locking portion between the locking portion and the roller toward the substrate side. When the roller support member does not receive an upward force exceeding the urging force of the urging member from the roller, the roller support member is movable in the vertical direction, and the roller support member is movable. When an upward force exceeding the urging force of the urging member is received from the roller, the roller support member swings with respect to the swing fulcrum, and the locking portion is locked to the locked portion.

The tension adjusting device for the moving handrail according to the embodiment is a tension adjusting device for adjusting the tension of the moving handrail, which is arranged on an endless moving handrail provided on a passenger conveyor for transporting passengers, and is a substrate fixed to the skeleton. A roller that abuts on the moving handrail, a roller support member that supports the roller by projecting it in the horizontal direction and is movable in the vertical direction with respect to the substrate, and a roller support member that is predetermined to face downward. It has an urging member urged by the urging force of the above, a locked portion provided on the substrate, and a locking portion provided on the roller support member, and the locking portion is locked to the locked portion. The roller support member is provided with a locking mechanism for limiting the movement of the roller support member, and the roller support member is capable of swinging the locking portion between the locking portion and the roller toward the substrate side. The roller support member is movable in the vertical direction when the moving handrail is stopped, and the roller support member is urged from the roller during operation of the moving handrail . The roller support member swings with respect to the swing fulcrum when a rotational moment around the swing fulcrum is generated by receiving an upward force exceeding the urging force of the member, and the locking portion engages with the swing fulcrum. Locks to the stop.

Claims (6)

It is a tension adjusting device that is arranged on an endless moving handrail provided on a passenger conveyor that conveys passengers and adjusts the tension of the moving handrail.
The board fixed to the skeleton and
A roller that comes into contact with the moving handrail,
A roller support member that projects and supports the rollers in the horizontal direction and is movable in the vertical direction with respect to the substrate.
An urging member that urges the roller support member downward with a predetermined urging force,
It has a locked portion provided on the substrate and a locking portion provided on the roller support member, and the locking portion is locked to the locked portion to limit the movement of the roller support member. With a lock mechanism,
The roller support member has a swing fulcrum between the locking portion and the roller so that the locking portion can swing toward the substrate side, and the roller support member urges the roller from the roller. A tension adjusting device in which the roller support member swings with respect to a swinging fulcrum when an upward force exceeding the urging force of the member is received, and the locking portion is locked to the locked portion. The tension adjusting device according to claim 1, wherein the point of action of the urging force of the urging member is located between the swing fulcrum and the point of action of the reaction force that the roller receives from the moving handrail. The tension adjusting device according to claim 1 or 2, wherein the locked portion is a plurality of recesses provided side by side in the vertical direction, and the locking portion is a claw portion that enters the recess. The tension adjusting device according to any one of claims 1 to 3, wherein the swing fulcrum is a spacer provided between the substrate and the roller support member. The tension adjusting device according to claim 4, wherein the substrate has a guide shaft penetrating the roller support member, and the guide shaft is provided so as to penetrate the spacer. The substrate is provided with an unlocking urging member that presses the roller support member in the horizontal direction above the swing fulcrum, and the unlocking urging member holds the lock mechanism at the locking position. The tension adjusting device according to any one of claims 1 to 5, which urges the release position from the above.

Images