JP2021138465A - Tension device for moving handrail - Google Patents

Abstract

To provide a tension device for a moving handrail capable of maintaining the tension of a moving handrail in a proper range and capable of easily detecting it with a simple configuration when the tension is outside the proper range.SOLUTION: A tension device for a moving handrail applies tension to an endless moving handrail provided on a passenger conveyor carrying passengers. The tension device for a moving handrail comprises an abutment roller contacting the moving handrail, a roller supporting member to support the abutment roller, a base to support the roller supporting member in free displacement, and an elastic body to apply tension to the moving handrail abutting on the abutment roller by pressing the roller supporting member with the previously accumulated energizing force. The position of the roller supporting member is held with respect to the base when the force that the elastic body acts on the moving handrail is within a prescribed range, and the roller supporting member is displaced with respect to the base in the direction opposite to the energizing direction of the elastic body when a large force exceeding the prescribed range is applied on the moving handrail.SELECTED DRAWING: Figure 2

Description

An embodiment of the present invention relates to a tension device for a moving handrail that applies tension to the moving handrail of a passenger conveyor.

Generally, in a passenger conveyor such as an escalator or an autoload, a tension device for a moving handrail that applies tension to the moving handrail is known.
In such a tension device for a moving handrail, there is a device that constantly presses the moving handrail to apply a predetermined tension and notifies that the tension exceeds a predetermined tension range. Then, when notified, the tension device for the moving handrail and the moving handrail are maintained.

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

However, in the case of notifying when the tension of the moving handrail deviates from a predetermined range, there is a problem that the configuration for notifying is complicated and costly.

Therefore, the present invention provides a tension device for a moving handrail that can maintain the tension of the moving handrail within an appropriate range and can easily detect the tension outside the appropriate range with a simple configuration.

One embodiment is a tensioning device for a moving handrail that applies tension to an endless moving handrail provided on a passenger conveyor that conveys passengers, and supports a contact roller that contacts the moving handrail and the contact roller. By pressing the roller support member, the base that supports the roller support member in a displaceable manner, and the roller support member with a pre-accumulated urging force, tension is applied to the moving handrail with which the contact roller abuts. When the force acting on the moving handrail by the elastic body is within a predetermined range, the position of the roller support member with respect to the substrate is held, and a large force exceeding the predetermined range acts. In this case, it is a tension device for a moving handrail in which the roller support member is displaced with respect to the substrate in a direction opposite to the urging direction of the elastic body.

In the passenger conveyor according to the first embodiment, it is a vertical cross section which roughly shows the whole driving device of a moving handrail. It is a tension device for a moving handrail shown in FIG. 1, and is a view when the tension of the moving handrail is within an appropriate range, (a) is a front view showing a partial breakage, and (b) is a side view. Is. In the tension device for a moving handrail shown in FIG. 2, it is a view in a state where the tension of the moving handrail is out of an appropriate range, and is a front view showing a partial breakage. It is a graph which shows the relationship between the change of the pressing force which a contact roller presses a moving handrail in the tension device for a moving handrail shown in FIG. 2 and the displacement of a roller support member. It is a front view which shows the tension device for a moving handrail which concerns on 2nd Embodiment, when the tension of a moving handrail is within an appropriate range, and shows that it is partially broken. It is a figure of the tension device for a moving handrail which concerns on 3rd Embodiment, it is a figure when the tension of a moving handrail is within an appropriate range, and is the front view which shows by breaking a part. FIG. 6 is a view of a tension device for a moving handrail shown in FIG. 6, which is a front view showing a state in which the tension of the moving handrail is larger than an appropriate range and is partially broken. FIG. 6 is a view of a tension device for a moving handrail shown in FIG. 6, in which the tension of the moving handrail is smaller than an appropriate range, (a) is a front view showing a partial breakage, and (b) is a side view. Is. It is a graph which shows the relationship between the change of the pressing force which a contact roller presses a moving handrail in the tension device for a moving handrail shown in FIG. 6 and the displacement of a roller support member.

Hereinafter, the moving handrail tensioning device according to the embodiment will be described. First, with reference to FIGS. 1 to 4, a passenger conveyor on which the moving handrail tensioning device according to the first embodiment is installed will be described.
(First Embodiment)
As shown in FIG. 1, the passenger conveyor is an escalator, and is installed so as to be inclined between the upper floor and the lower floor of the building, for example.
In the moving handrail driving device 1, the endless moving handrail 3 is circulated and driven in synchronization with the movement of the steps (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 includes 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 (before and after the moving handrail 3 in the traveling direction, 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 part of the moving handrail 3 on the return route side. The slack removing portion 5f is provided with a tension device 7 for a moving handrail that applies tension to the moving handrail 3, and by applying a downward pressing force to the moving handrail 3, an appropriate tension is applied to the moving handrail 3. Gives and 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, and when the moving handrail 3 enters the slack removing portion 5f, it is smooth without bending at a steep angle. It is designed to be transformed into.
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 device 7 for the moving handrail according to the first embodiment will be described.
As shown in FIG. 2, the moving handrail tensioning device 7 includes two contact rollers 9 and 9 that come into contact with the moving handrail 3, a roller support member 11 that supports each of the contact rollers 9 and 9, and a roller support member. It includes a base 13 that supports the eleven in a displaceable manner, and an elastic body 15.
The contact rollers 9 are rotatable about the shaft 9a, are provided side by side along the traveling direction of the moving handrail 3, and are in contact with the inner peripheral side surface of the moving handrail 3, respectively.

The roller support member 11 has a plate shape, and the shafts 9a of the two contact rollers 9 are fixed to the surface thereof. An urging force receiving portion 19 for receiving the urging force of the elastic body 15 is provided between the two contact rollers 9 and 9. As shown in FIG. 2B, the urging force receiving portion 19 is provided so as to project from the surface 11a of the roller support member 11 to the position of the contact roller 9. As shown in FIG. 2A, the urging force receiving portion 19 has a substantially T-shape when viewed from the front, the horizontal portion 19a is used as the urging force receiving surface, and the vertical portion 19b is the horizontal portion 19a. As a support part of.
Further, as shown in FIG. 2B, the roller support member 11 is arranged so that its plate surface is slidably overlapped with the vertical surface of the vertical wall portion 13a of the substrate 13.
In the roller support member 11, bolt insertion holes 21 and 21 are formed at the left and right (left and right in FIG. 2A) side ends along the moving direction of the moving handrail 3, respectively. The bolt insertion holes 21 and 21 are elongated holes that are long in the vertical direction, respectively.

As shown in FIG. 2A, the substrate 13 is fixed to the truss member (not shown) of the passenger conveyor with fixing bolts 25 and 25 (omitted in FIG. 2B), and is fixed in FIG. 2B. ), The vertical wall portion 13a and the horizontal wall portion 13b form a substantially L-shape. The horizontal wall portion 13b projects substantially parallel to the urging force receiving portion 19.
Further, an elastic body storage portion 17 for storing the elastic body 15 is provided on the lower surface of the horizontal wall portion 13b.
As shown in FIG. 2A, a roller support member 11 is attached to the base 13 by a bolt 23 for inserting a shaft into the bolt insertion holes 21 and 21, and the roller support member 11 is attached to the base 13 with respect to the base 13. It is pressed vertically and vertically by the head 23a of the bolt 23.

Here, the marks 27a and 27b indicating the displacement position of the roller support member 11 will be described.
As shown by the one-dot chain line extracted in FIG. 2A, the vertical wall portion 13a of the substrate 13 has a mark 27a with the letters “normal A to C” and a blue line in front of the vertical wall portion 13a, and “adjustment required D”. A mark 27b with the characters "above" and a red line is attached, and it is displayed as a mark whether the position of the roller support member 11 is normal or abnormal (adjustment required). On the other hand, the upper end 11c of the roller support member 11 serves as an index indicating the marks 27a and 27b. As shown in FIG. 4, reference numerals A, B, C, and D are numerical values of force (Newton (N)).
Therefore, the displacement of the roller support member 11 can be known by the position of the mark 27a or 27b at the upper end 11c of the roller support member 11.

Next, the elastic body 15 and the elastic body accommodating portion 17 will be described.
The elastic body storage portion 17 has a tubular shape, and the elastic body 15 is stored inside the cylinder. The elastic body 15 is a compression coil spring, and is arranged in the elastic body accommodating portion 17 in a compressed state so as to accumulate a predetermined urging force.
The upper end (one end) of the elastic body 15 is in contact with the lid member (not shown) of the elastic body storage portion 17, and the lower end (other end) 15a of the elastic body 15 is attached to the lower end portion 17b of the elastic body storage portion 17. It is in contact with the placed elastic support plate 29. The lower end portion 17b of the elastic body storage portion 17 is an annular protrusion portion that protrudes inward, and the elastic body support plate 29 is held on the lower end portion 17b in a state of being placed from above. The elastic body support plate 29 is movable upward against the urging force of the elastic body 15.
The horizontal portion 19a of the urging force receiving portion 19 is in contact with the lower surface of the elastic body support plate 29 from below.

The operation of the tension device 7 for the moving handrail according to the present embodiment will be described.
As shown in FIG. 1, the moving handrail 3 of the passenger conveyor holds a tension within a predetermined range by the moving handrail tensioning device 7.
Specifically, as shown in FIG. 2, the precompressed elastic body 15 urges the roller support member 11 downward via the elastic body support plate 29 and the urging force receiving portion 19. ..
The pre-compressed elastic body 15 presses the elastic body support plate 29 with urging forces A to B (see FIG. 4) in a predetermined range in a normal state. In other words, the elastic body support plate 29 is maintained in a state of being in contact with the lower end portion 17b of the elastic body accommodating portion 17 under the urging force in the normal state. That is, as shown in FIG. 4, in the initial position E (state shown in FIG. 2), the position of the roller support member 11 with respect to the substrate 13 does not change in the range of the initial pressing force A and the pressing force B or less lower than that. , The roller support member 11 does not displace with respect to the substrate 13. In FIG. 4, the magnitudes of the pressing forces A to D have a relationship of B <A <C <D.
The roller support member 11 holds the initial set position of the roller support member 11 without being displaced within the range of the urging force in the normal state (pressing force A or less). Therefore, in the case of the urging force in the normal state shown in FIG. 2, the contact rollers 9 and 9 fixed to the roller support member 11 come into contact with the moving handrail 3 with the urging force in the normal state range. The tension in the normal state range is applied to the moving handrail 3.

During normal operation, the moving handrail 3 may expand or contract. For example, expansion and contraction due to temperature, expansion and contraction due to the return of bending habits, fatigue of the elastic body 15, and the like.
Further, when the moving handrail 3 shrinks due to deterioration or the like, the contact roller 9 is pushed up together with the roller support member 11, and the urging force receiving portion 19 fixed to the roller support member 11 elastically elasticizes the elastic body support plate 29. It pushes up against the urging force of the body 15, presses and contracts the elastic body 15, and increases the urging force acting on the moving handrail 3.
If the urging force acting on the moving handrail 3 becomes excessively large and deviates significantly from the appropriate range, the running resistance of the moving handrail 3 becomes excessive, friction and heat generation increase rapidly, and the life of the moving handrail 3 may be shortened. be.
On the other hand, as shown in FIG. 4, when the urging force acting on the moving handrail 3 by the elastic body 15 becomes larger than the pressing force C, the elastic body 15 is compressed and contracted as shown in FIG. The roller support member 11 is displaced upward together with the contact roller 9, and the upper end 11c of the roller support member 11 reaches the mark 27b of “adjustment required D or more”.

When the mark 27b is indexed in this way, the serviceman notices the mark during regular inspections or arbitrary inspections, and if necessary, replaces the elastic body 15 of the tension device 7 for the moving handrail, or the elastic body 15 By adjusting the urging force of the moving handrail 3 or by maintaining the moving handrail 3, the moving handrail 3 is adjusted to have an appropriate urging force.

Here, the relationship between the displacement of the roller support member 11 (contact roller 9) and the urging force (pressing force) of the elastic body 15 in the first embodiment will be described with reference to FIG.
When in the initial position (normal position) shown in FIG. 2, the upper end 11c of the roller support member 11 is in the position indicating the normal position 27a. In this state, the abutting roller 9 receives the urging force of the elastic body 15 via the elastic body supporting portion plate 29 and the urging force receiving portion 19, and pushes down the moving handrail 3 with a predetermined urging force.
At this initial position, the reaction force received from the moving handrail 3 is the pressing force A, but when it is C or less, the horizontal portion 19a of the urging force receiving portion 19 is attached to the elastic body support plate 29 as shown in FIG. Since the contacted state is maintained, the upper end 11c of the roller support member 11 is located at the mark 27a in the proper state when the pressing force is C or less.
On the other hand, when the reaction force received from the moving handrail 3 exceeds the pressing force C, the reaction force is received from the moving handrail 3 and the roller support member 11 gradually moves upward against the urging force of the elastic body 15. As shown in FIG. 3, the upper end 11c of the roller support member 11 is located on the indication of “adjustment required D or more” indicated by the mark 27b.

Since the displacement of the roller support member 11 shown in FIGS. 2 and 3 is expansion and contraction mainly due to deterioration of the moving handrail 3 over time, it is performed over a relatively long span (slightly on a daily or weekly basis). ..
On the other hand, when an overload acts on the moving handrail tension device 7 via the moving handrail 3 by a passenger or the like, for example, when a passenger gets on or off the passenger conveyor, he / she excessively clings to the moving handrail 3 or moves the moving handrail. A sudden overload may act on the moving handrail 3 due to mischief such as pulling the 3. In this case, the roller support member 11 is temporarily displaced, but it does not affect the fluctuation of the mark during the periodic inspection.
Further, as shown in FIG. 3, when the reaction force received by the elastic body 15 from the moving handrail 3 exceeds the mark 27b, that is, when the reaction force exceeds the pressing force D (see FIG. 4), the bolt A stopper 31 (see FIG. 2) formed at the lower end of the bolt insertion hole 21 of the roller support member 11 to which the 23 moves comes into contact with the roller support member 11 to prevent the roller support member 11 from being displaced upward.

Next, the effect of the first embodiment will be described.
As shown in FIG. 4, according to the moving handrail tensioning device 7 of the first embodiment, when the reaction force of the moving handrail 3 acting on the elastic body 15 is within a predetermined range (pressing force C or less), FIG. As shown in FIG. 2, when the position of the roller support member 11 with respect to the substrate 13 is maintained and a large force exceeding a predetermined range (pressing force C or less) is applied, the elastic body 15 is urged as shown in FIG. Since the roller support member 11 is displaced with respect to the base 13 in the direction opposite to the direction, the tension of the moving handrail 3 can be maintained within an appropriate range (pressing force C or less) and is out of the appropriate range (pressing force C or less). Occasionally, it is possible to easily detect that the tension of the moving handrail is out of the appropriate range due to the displacement of the roller support member 11 with a simple configuration.

The elastic body 15 is a compression coil spring, and since the compression coil spring is contracted in advance to accumulate a predetermined urging force, the accumulated urging force can be changed by changing the amount of contraction. Easy to adjust.
Using the upper end 11c of the roller support member 11 as an index, the substrate 13 is provided with marks 27a and 27b indicating the displacement positions of the roller support member 11, so that the tension state of the moving handrail 3 can be easily detected visually. can.
When the displacement of the roller support member 11 with respect to the substrate 13 exceeds a predetermined amount (pressing force D (see FIG. 4)), a stopper 31 (see FIG. 2) for restricting the displacement of the roller support member 11 is provided. The movement of the roller support member 11 can be restricted.
Since the stopper 31 is the end of the bolt insertion hole 21 in which the bolt 23 is movably provided, the configuration is simple.

Other embodiments of the present invention will be described below, but in the embodiments described below, details of the parts that exhibit the same effects as those of the above-described first embodiment are designated by the same reference numerals. In the following description, the main differences from the first embodiment will be described.
(Second Embodiment)
The second embodiment will be described with reference to FIG.
This second embodiment is different from the first embodiment in that the tension device 7 for the moving handrail is provided with a buffer member 33 that buffers the sudden reaction force received from the moving handrail 3 by the contact rollers 9 and 9. ..

Specifically, in the elastic body storage portion 17, the lower end of the cushioning member 33 is fixed to the elastic body support plate 29, and the upper end of the cushioning member 33 is fixed to the elastic body storage portion 17. When the elastic body support plate 29 suddenly tries to move upward, the cushioning member 33 imparts resistance to suppress the sudden movement, and allows the elastic body support plate 29 to move slowly.
The cushioning member 33 is composed of, for example, a cylinder fixed to the elastic body storage portion 17 and a piston fixed to the elastic body support plate 29, and the tubular body is filled with a fluid flowing through an orifice. The fluid flows through the orifice when the piston pushes up the fluid, and the sudden movement of the fluid in the cylinder is controlled by the orifice.

According to this second embodiment, for example, when a passenger gets on or off the passenger conveyor, the moving handrail 3 is suddenly overloaded due to mischief such as excessively clinging to the moving handrail 3 or pulling the moving handrail 3. When a load is applied, damage to the roller support member 11 and its surroundings due to a sudden displacement of the roller support member 11 can be prevented.

(Third Embodiment)
A third embodiment will be described with reference to FIGS. 6 to 9.
This third embodiment is different from the first embodiment in that it has a first elastic body (elastic body) 15 and a second elastic body 35 having a smaller accumulated urging force than the first elastic body 15. ing.
As shown in FIG. 6, the roller support member 11 receives the urging force accumulated by the first elastic body 15 and the second elastic body 35 via the urging force receiving portion 19, and the roller support member 11 receives the urging force. When the reaction force received by the contact roller 9 from the moving handrail 3 is larger than the total accumulated urging force of the first elastic body 15 and the second elastic body 35, the first and second elastic bodies 15 and 35 It moves in the direction opposite to the urging direction, and when it is smaller than the urging force accumulated in the second elastic body 35, it moves in the urging direction of the second elastic body 35.
The first elastic body 15 and the second elastic body 35 are compression coil springs, respectively, but the outer diameter of the second elastic body 35 is smaller than the inner diameter of the first elastic body 15, and the second elastic body 35 is the first elastic body. It is housed inside the body 15.

The elastic body support plate (first elastic body support plate) 29 has an annular shape, and the outer peripheral side portion 29a is placed on the lower end portion 17b of the elastic body storage portion 17, and the first elastic body 15 is placed on the upper surface. The lower end of is in contact. The upper end of the second elastic body 35 is in contact with the receiving portion 39 of the second elastic body 35 provided at an intermediate position in the vertical direction of the elastic body storage portion 17.
A second elastic body support plate 37 that receives the lower end of the second elastic body 35 is arranged on the inner peripheral side of the annular first elastic body support plate 29, and the second elastic body support plate 37 is the first elastic body. It is arranged so as to abut from below on the inner peripheral side portion of the support plate 29.
In the third embodiment, the urging force receiving portion 19 is provided on the lower surface of the second elastic body support plate 37, and the urging force receiving portion 19 is formed in a U-shape with the lower side opened in the front view shown in FIG. Has been done.

In FIGS. 6 to 9, the urging force (pressing force) of the third embodiment is the total urging force of the urging force of the first elastic body 15 and the urging force of the second elastic body 35. A, B, C, and D, and the urging force possessed only by the second elastic body 35 is F.
The magnitude of the urging force in this third embodiment is F <B <A <C <D and the unit is N (Newton).

Next, the operation in the third embodiment will be described.
FIG. 6 shows an initial setting state (normal state), and the upper end 11c of the roller support member 11 is in a position indicating “normal A to C”. In this normal position, pressing forces A to C (see FIG. 9) are constantly applied to the moving handrail 3.

When a reaction force exceeding the pressing force C acts on the contact roller 9 from the moving handrail 3, the roller support member 11 is displaced upward together with the contact roller 9, and as shown in FIG. 7, the moving handrail 3 is moved. When the pressing force reaches D (see FIG. 9), the shaft of the bolt 23 comes into contact with the stopper 31 (see FIG. 6) provided in the bolt insertion hole 21, and the roller support member 11 does not displace above it. ..

On the other hand, as shown in FIG. 9, when the pressing force is lower than B, the first elastic body support plate 29 is placed on the lower end portion 17b of the elastic body storage portion 17, as shown in FIG. 8A. The second elastic body support plate 37 is pushed by the second elastic body 35 and is displaced downward while being held in the state of being held.
Then, when the pressing force decreases to F, the upper end 11c of the roller support member 11 is positioned at the position of "adjustment required F or less" as shown by the mark 27c.
Further, when the pressing force is reduced to F (see FIG. 9), the shaft of the bolt 23 comes into contact with the other stopper 32 (see FIG. 7), so that the roller support member 11 stops at that position and does not lower further.

According to this third embodiment, when the pressing force of the moving handrail 3 is within a predetermined range (pressing forces A to C (see FIG. 9)), the position of the roller support member 11 with respect to the base 13 is maintained and predetermined. When a large force exceeding the range (pressing force C (see FIG. 9)) is applied, the roller support member 11 is displaced in the direction opposite to the urging direction of the first elastic body 15 and the second elastic body 35. The tension of the moving handrail 3 can be maintained within an appropriate range (pressing force C to B), and as shown in FIG. 7, when the tension becomes larger than the appropriate range and the pressing force D is reached, the roller support member 11 holds it. It can be easily detected by displacing it at the position of the mark 27b shown.
Further, as shown in FIG. 8, when the pressing force on the moving handrail 3 becomes smaller than the predetermined range (pressing force B (see FIG. 9) or less) and becomes F or less, the second elastic body 35 By displacing the roller support member 11 with respect to the substrate 13 at the position of the mark 27b along the urging direction of the moving handrail 3, it can be easily detected that the pressing force of the moving handrail 3 is smaller than the predetermined range.

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 modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.
For example, in the first to third embodiments described above, the marks 27a, 27b, and 27c are not limited to using the upper end 11c of the roller support member 11 as an index, but also using the position of the head 23a of the bolt 23 as an index to insert the bolt insertion hole. Markers 27a, 27b, and 27c may be provided next to the 21.
The stoppers 31 and 32 are the upper ends and the lower ends of the bolt insertion holes 21, but the stoppers 31 and 32 are not limited to these, and protrusions that regulate the vertical movement of the roller support member 11 may be provided on the surface of the substrate 13.

3 ... Moving handrail, 7 ... Tension device for moving handrail, 11 ... Roller support member, 13 ... Base, 15 ... Elastic body (first elastic body), 27a, 27b, 27c ... Mark, 31, 32 ... Stopper, 33 ... Cushioning member, 35 ... Second elastic body.

One embodiment is a tensioning device for a moving handrail that applies tension to an endless moving handrail provided on a passenger conveyor that conveys passengers, and supports a contact roller that abuts on the moving handrail and the contact roller. By pressing the roller support member, the base that supports the roller support member in a displaceable manner, and the roller support member against the base with a pre-accumulated urging force, the contact roller comes into contact with the base. An elastic body that applies tension to the moving handrail is provided, and the elastic body includes a first elastic body in which an urging force is accumulated in advance and a second elastic body in which the urging force is smaller than that of the first elastic body. The roller support member receives the urging force accumulated by the first elastic body and the second elastic body, and the force that the elastic body acts on the moving handrail is the first and second elastic bodies. When it is larger than the total urging force accumulated in the above, the roller support member moves in the direction opposite to the urging direction of the first and second elastic bodies, and is larger than the urging force accumulated in the second elastic body. When small, the roller support member is a tension device for a moving handrail that moves in the urging direction of the second elastic body.

Claims (6)

A tensioning device for moving handrails that applies tension to the endless moving handrails provided on a passenger conveyor that transports passengers.
An abutting roller that comes into contact with the moving handrail,
A roller support member that supports the contact roller and
A substrate that supports the roller support member in a displaceable manner and
The roller support member is provided with an elastic body that applies tension to the moving handrail with which the contact roller abuts by pressing the roller support member against the substrate with a pre-accumulated urging force.
When the force acting on the moving handrail by the elastic body is within a predetermined range, the position of the roller support member is held with respect to the substrate, and when a large force exceeding the predetermined range is applied, the elastic body is attached. A tension device for a moving handrail in which the roller support member is displaced with respect to the substrate in a direction opposite to the force direction. The elastic body has a compression coil spring, and the accumulated urging force is changed by contracting the compression coil spring in advance to accumulate the urging force and changing the amount of contraction of the compression coil spring. Tension device for moving handrails described in. The tensioning device for a moving handrail according to claim 1 or 2, wherein at least one of the roller support member and the substrate is provided with a mark indicating the displacement of the roller support member with respect to the substrate. The tensioning device for a moving handrail according to any one of claims 1 to 3, wherein a stopper is provided to regulate the displacement of the roller support member when the displacement amount of the roller support member with respect to the substrate exceeds a predetermined amount. The tensioning device for a moving handrail according to any one of claims 1 to 4, which is provided with a cushioning member that moderates the displacement of the roller support member with respect to the substrate when a sudden force is applied to the moving handrail. The elastic body has a first elastic body in which an urging force is accumulated in advance and a second elastic body in which the urging force is smaller than that of the first elastic body, and the roller support member is a first elastic body. When the second elastic body receives the accumulated urging force and the force acting on the moving handrail by the elastic body is larger than the total accumulated urging force of the first and second elastic bodies. When the roller support member moves in a direction opposite to the urging direction of the first and second elastic bodies and is smaller than the urging force accumulated in the second elastic body, the roller support member is of the second elastic body. The tensioning device for a moving handrail according to any one of claims 1 to 5, which moves in the urging direction.

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