JP2001171965A - Treadboard chain takeup device for passenger conveyer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the treadboard chain takeup of a passenger conveyer capable of easily replacing the cushioning materials of a takeup gear wound with an endless treadboard chain. SOLUTION: The engaging grooves of a takeup gear 4 for providing tensile force to a treadboard chain 6 are engaged with plural cushioning pieces forming an annulus ring with their end adjacent, respectively. Each cushioning piece is fastened to the takeup gear 14 by means of a fastener for mounting the cushioning pieces for supporting the roller for the treadboard chain 6. Thus, engaging sound between the roller of the treadboard chain 6 and the takeup gear 4 is reduced in operation. In replacing the deteriorated cushioning pieces, work for the treadboard chain 6-free nonwound portion in the takeup gear 4 successively removes the cushioning pieces from the takeup gear 4 for replacement. Thus, replacement work for the cushioning pieces is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tread chain tensioning device for a passenger conveyor such as an escalator or a moving sidewalk in which a tread chain in which a number of treads are connected endlessly is circulated in a main frame.

[0002]

2. Description of the Related Art FIG. 12 and FIG.
FIG. 12 is a side view schematically showing a tread chain tensioning device of a conventional passenger conveyor similar to the configuration shown in JP-A-59670, FIG. 12 is a conceptual side view of an escalator, and FIG. It is an expanded sectional view of a part. In the figure, reference numeral 1 denotes a main frame of a passenger conveyor composed of an escalator, which is constituted by a truss.

[0003] Reference numeral 2 denotes a drive chain gear disposed at an upper portion of the main frame 1, and 3 denotes a tensioning device disposed at a lower portion of the main frame 1, which is a tension wheel which is displaceable in the longitudinal direction of the main frame 1. 4. An urging mechanism 5 for urging the tensioner 4 toward the lower end of the main frame 1. 6 is a tread chain consisting of a roller chain,
A large number of treads 7 are connected endlessly, wrapped around the drive chain gear 2 and the tension wheel 4 and circulate in the main frame 1.

Reference numeral 8 denotes a driving device provided at the upper end of the main frame 1.
Drive. Reference numeral 9 denotes a balustrade standing upright along both sides of the main frame 1 in the width direction. Reference numeral 10 denotes a fitting groove provided on the rim of the tensioning wheel 4 and disposed in a direction along the rotation direction. Reference numeral 11 denotes a cushioning material. A viscoelastic material such as rubber is formed in an annular shape and fitted into the fitting groove 10. The upper surface is provided so as to protrude from the outer diameter of the tension wheel 4.

[0005] Reference numeral 12 denotes a link plate of the tread chain 6, which is fitted to the side surface of the tension wheel 4 with a gap formed therein and partially overlapped with the outer diameter of the tension wheel 4. A roller 13 of the tread chain 6 is supported by the cushioning material 11 while being wound around the tension wheel 4. Reference numeral 14 denotes a pin connecting the link plate 12 and the roller 13 of the tread chain 6.

[0006] The conventional stepping device for a passenger conveyor is constructed as described above, and the tread chain 6 in which the treads 7 are connected endlessly.
Is wound around the drive chain gear 2 and the tension wheel 4. And
When the driving device 8 is energized, the treads 7 circulate in the main frame 1 via the tread chain 6 to convey passengers on the treads 7.

Although not shown, the drive chain gear 2
Are provided with rubber soundproofing pieces for reducing the engagement noise of the tread chain 6 with the rollers 13. Further, the tension wheel 4 is provided with a ring-shaped cushioning material 11 for soundproofing made of rubber or the like for reducing the sound of engagement with the roller 13. In addition, the operation of the passenger conveyor is made quiet by such a structure.

[0008]

In the conventional tensioning device for a tread chain of a passenger conveyor as described above, when replacing the deteriorated annular cushioning material 11 of the tensioned car 4, a part of the tread plate 7 is removed and the tread chain is removed. 6. A troublesome work such as the loosening of 6 and the removal of one side of the tension wheel 4 axle and lifting to remove the deteriorated cushioning material 11 and the insertion of the cushioning material 11 to be renewed is required. There was a point.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and provides a tension device for a passenger conveyor, which can easily replace a cushioning material of a tension car on which an endless chain is wound. The purpose is to:

[0010]

SUMMARY OF THE INVENTION In the tensioning device for a tread chain of a passenger conveyor according to the present invention, a plurality of tread plates of a passenger conveyor are connected to each other to form an endless shape, and the tread chain is circulated in a main frame of the passenger conveyor. The rim is provided with a concave fitting groove along the rotation direction, and is provided at an end of the main frame so as to be displaceable in the longitudinal direction of the main frame. The tread chain is wound around to apply tension to the tread chain. A tensioning wheel and a plurality of ends arranged adjacent to each other to form a ring, which is fitted in the fitting groove, respectively fastened to the tensioning wheel by fasteners, and a cushioning piece for supporting the roller of the tread chain. Are provided.

Further, in the tread chain tensioning device for a passenger conveyor according to the present invention, a large number of treads of the passenger conveyor are connected to each other so as to be endless, and the tread chain and the main frame are circulated in the main frame of the passenger conveyor. Glued to the surface of a mounting wheel consisting of an arc-shaped piece and a tension wheel that is provided at the end and is displaceable in the longitudinal direction of the main frame and that tensions the tread chain by winding the tread chain. The ends are formed adjacent to each other to form a ring, and are arranged on the rim surface of the tensioning wheel via the back surface of the mounting bracket, and are fastened to the tensioning wheel by fasteners, respectively, and the rollers of the tread chain. And a cushioning piece for supporting the same.

Further, in the treadle chain tensioning device for a passenger conveyor according to the present invention, at least three cushioning pieces forming an annular shape are provided.

[0013] Further, in the tread chain tensioning device for a passenger conveyor according to the present invention, no matter what integer is multiplied by the pitch angle of the rollers of the tread chain at the center of rotation of the tensioning car, 3 times.
The total outer peripheral length of the buffer piece formed on the outer periphery of the tension wheel is set to the length at which the relationship that does not become 60 ° is established.

Further, in the tread chain tensioning device for a passenger conveyor according to the present invention, an angle which is not an integral multiple of the pitch angle of the rollers of the tread chain at the center of rotation of the tensioned car is
The pitch angle of each buffer piece at the rotation center of the tension wheel is set.

Further, in the tread chain tensioning device for a passenger conveyor according to the present invention, from the outside of the side wall on one side of the fitting groove of the tensioning wheel, the cushioning piece fitted into the side wall and the fitting groove of the tensioning wheel. Is provided, and a fastener screwed into the other side wall of the fitting groove of the tension wheel is provided.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 5 are views showing an example of an embodiment of the present invention. FIG. 1 is a side view conceptually showing a lower end of a main frame of an escalator, and FIG.
Enlarged view of the tension car on the escalator in Fig. 2 and Fig. 3
4 is a sectional view taken along the line BB of FIG. 3 showing a state in which the tread chain is wound, and FIG. 5 is a process diagram of the work of replacing the cushioning material in the escalator of FIG. Except for FIGS. 1 to 5, a passenger conveyor is configured in the same manner as in FIGS. 12 and 13 described above.

In FIG. 1, reference numeral 1 denotes a main frame of a passenger conveyor composed of an escalator, which is constituted by a truss. Reference numeral 3 denotes a tensioning device disposed at a lower portion in the main frame 1. A tensioning wheel 4, which is displaceable in the longitudinal direction of the main frame 1, and a biasing mechanism for biasing the tensioning wheel 4 toward the lower end of the main frame 1. 5. 6 is a tread chain consisting of a roller chain,
A large number of treads 7 are connected endlessly, wound around the drive chain gear 2 and the tension wheel 4 and circulate in the main frame 1.

Reference numeral 10 denotes a fitting groove provided on the rim of the tension wheel 4 and arranged in a direction along the rotation direction. Reference numeral 15 denotes a cushioning piece, which is made of a viscoelastic material such as rubber, and whose ends are arranged adjacent to each other. The circumference is divided by a plurality of divided circumferences, that is, three to form an annular ring. The upper surface is fitted into the mating groove 10 so that the upper surface protrudes from the outer diameter of the tension wheel 4. Reference numeral 16 denotes a fastener, which is formed of a countersunk screw and is disposed apart from each other along the length of the buffer piece 15, inserted through the buffer piece 15 from its surface, and screwed into the bottom surface of the fitting groove 10 of the tension wheel 4.

Reference numeral 12 denotes a link plate of the tread chain 6, which is fitted to the side surface of the tension wheel 4 with a gap formed therein and partially overlapped with the outer diameter of the tension wheel 4. A roller 13 of the tread chain 6 is supported by the cushioning piece 15 in a state of being wound around the tension wheel 4. Reference numeral 14 denotes a pin connecting the link plate 12 and the roller 13 of the tread chain 6. Reference numeral 17 denotes a floor board detachably provided at the lower end of the main frame 1, and reference numeral 18 denotes a comb plate removably provided at an edge of the floor board 17 near the longitudinal center of the main frame 1.

In the tread chain tensioning device for a passenger conveyor constructed as described above, the tread chain 6 in which the treads 7 are connected endlessly is wound around the drive chain gear 2 and the tension wheel 4. When the driving device 8 is energized, the tread plate 7 circulates in the main frame 1 via the tread chain 6 to carry the passenger on the tread plate 7.

Although not shown, the drive chain gear 2
Are provided with rubber soundproofing pieces for reducing the engagement noise of the tread chain 6 with the rollers 13. In addition, the tension wheel 4 supports the roller 13 of the tread chain 6 to support the tension wheel 4 and the roller 13.
A cushioning piece 15 made of rubber or the like is provided to reduce the engagement noise with the rubber. In addition, the operation of the passenger conveyor is made quiet by such a structure.

Then, when replacing the degraded shock-absorbing piece 15 of the tensioner 4, the work shown in FIG. 5 is performed. That is, in Step 101, a part of the tread 7 near the lower end of the main frame 1 is removed from the tread chain 6, and an opening is formed in a continuous row of treads 7. In addition, boarding board 1
7 and the comb plate 18 are removed to provide a working space.

Next, at step 102, the driver 8 is manually operated to open the opening formed by the removed tread plate 7 with the tensioner 4
To the upper end side of the main frame 1 at. And step 1
3, the cushioning piece 15 corresponding to the unrolled portion from the side of arrow C shown in FIG. 16 and is removed.

Next, in step 104, the driving device 8 is manually operated again, and the tension wheel 4 is turned to move the unrolled portion to
Next, the corresponding buffer piece 15 releases the fastening by the fastener 16 and is removed. Then, by repeating the same operation as this operation, all the buffer pieces 15 are removed.

In step 105, a new buffer piece 15 is sequentially fitted into the fitting groove 10 of the tension wheel 4 by a procedure completely opposite to the above-described steps 102 to 104, and the tension wheel 4 is And fitted into the fitting groove 10. Then, such operations are repeated to mount all the buffer pieces 15. Next, the step board 7, the entry / exit floor board 17 and the comb board 18 removed in step 106 are returned to the previous state, and the work of replacing the deteriorated buffer piece 15 is completed.

In such a replacement work of the cushioning pieces 15, there is no need for a complicated work such as loosening the tread chain 6, removing one side of the tension wheel 4 axle, lifting up and inserting the cushioning material 11. For this reason, the buffer piece 15 of the tension wheel 4 around which the endless tread chain 6 is wound can be easily replaced, the working time can be reduced, and the cost of replacing the buffer piece 15 can be saved.

In the embodiment shown in FIGS. 1 to 5, a cushioning piece 15 which divides the circumference by three to form a ring is provided, and the length of the cushioning piece along the length of the fitting groove 10 of the tension wheel 4 is provided. The length is set shorter than the length of the portion where the tread chain 6 of the tension wheel 4 is not wound. However, even if the buffer piece having such a length is configured as a buffer piece that divides the circumference by another appropriate plural number to form a ring, the buffer piece according to the embodiment in FIGS. Action can be obtained.

Embodiment 2 FIG. 6 is a view showing an example of another embodiment of the present invention, and is an enlarged view of a tension wheel portion on an escalator, and is a view corresponding to the main part of FIG. 1 described above.
Except for FIG. 6, a passenger conveyor is configured in the same manner as in FIGS. 12 and 13 described above. In the figures, FIGS.
The same reference numerals denote the corresponding parts, and 19 denotes a cushioning piece, which is made of a viscoelastic material such as rubber, and whose ends are arranged adjacent to each other to form a ring by dividing the circumference, that is, by four pieces. The upper surface is fitted in the fitting groove 10 so as to protrude from the outer diameter of the tension wheel 4.

Numeral 20 denotes opposite ends of the buffer pieces 19, that is, joints. Also, θ shown in FIG. 6 is the pitch angle of each buffer piece 19 at the rotation center of the tension wheel 4, and φ shown in FIG.
Is the pitch angle of the roller 13.

In the tensioning device for the treadle chain of the passenger conveyor configured as described above, the passenger conveyor is operated in the same manner as in the embodiment of FIGS. 1 to 5 described above, and the tensioning wheel 4 is provided with the cushioning piece 19. . Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 5 can be obtained in the embodiment of FIG.

In general, in a passenger conveyor,
The tread chain 6 in which the pitch of the rollers 13 is constant is used.
Further, the pitch angle φ of the roller 13 changes due to the thickness of the buffer piece 19 and the like. Tension car 4
The total outer length of the cushioning pieces 19 formed on the outer circumference of is set so that a relationship that does not become 360 ° even if the pitch angle φ of the roller 13 of the tread chain 6 is multiplied by any integer. (For example, φ = 7 °)

Thus, the roller 1 of the tread chain 6 is positioned at the same position in the longitudinal direction of the buffer piece 19 by the circulating movement of the tread chain 6.
3 can be prevented from hitting. For this reason, it is possible to prevent a problem that the roller 13 always hits the same position in the longitudinal direction of the buffer piece 19 and the wear progresses.

The pitch angle θ of each buffering piece 19
Is set so as not to be an integral multiple of the pitch angle φ of the roller 13 of the tread chain 6. For this reason, the roller 13 of the tread chain 6 does not simultaneously face each of the joints 20 between the buffer pieces 19. Therefore, all seams 2
When the rollers 13 of the tread chain 6 are simultaneously fitted into the tread chain 0, it is possible to prevent the occurrence of troubles such as vibrations on the tread chain 6 concerned.

Embodiment 3 7 to 9 are views showing another example of the embodiment of the present invention. FIG. 7 is an enlarged view of a tension wheel portion on the escalator, and FIG. FIG. 4 is a sectional view of a main part of FIG.
FIG. 9 is a plan view of FIG. The passenger conveyor is configured in the same manner as in FIGS. 12 and 13 except for FIGS. 7 to 9. In the figure, the same reference numerals as those in FIGS.

Numeral 21 denotes a cushioning piece, which is made of a viscoelastic material such as rubber, and whose ends are arranged adjacent to each other. Are fitted in contact with the bottom surface of the vehicle, and the upper surface is provided so as to protrude from the outer diameter of the tension wheel 4. Reference numeral 22 denotes a fastener, which is formed of a countersunk screw, is inserted into the side wall and the buffer piece 21 from the outside of one side wall of the fitting groove 10 of the tension wheel 4 and is screwed into the other side wall of the fitting groove 10. They are spaced apart from one another along the circumference at the edge of the tension wheel 4.

In the tensioning device for the treadle chain of the passenger conveyor configured as described above, the passenger conveyor is operated in the same manner as in the above-described embodiment of FIGS. 1 to 5, and the tensioning wheel 4 is provided with the cushioning piece 21. . Therefore, although detailed description is omitted, FIGS.
The same operation as that of the embodiment can be obtained.

Further, the buffer piece 21 can be attached and detached by operating the fastener 22 from the direction of arrow D or arrow E shown in FIG. For this reason,
The fastener 22 can be easily operated at the time of replacing the degraded cushioning piece 21 of the tension wheel 4, and the work efficiency can be improved. In addition, an appropriate taper pin instead of the fastener 22,
The operation in the embodiment shown in FIGS. 7 to 9 can be obtained by using a split pin or the like.

Embodiment 4 FIG. FIGS. 10 and 11 also show an example of another embodiment of the present invention. FIG. 10 is a diagram corresponding to FIG. 4 described above, and FIG. 11 is a side view of a buffer piece portion in FIG. The passenger conveyor is configured in the same manner as in FIGS. 12 and 13 except for FIGS. 10 and 11. In the figure, the same reference numerals as those in FIGS.

Reference numeral 23 denotes a recess formed by retreating from the side of the outer peripheral edge of the tensioning wheel 4, and reference numeral 24 denotes a mounting bracket formed of an arc-shaped piece having an L-shaped cross section. Then, an annular shape is formed by a plurality of divided circumferences, and one side of the L-shape is provided to fit into the recess 23.

Reference numeral 25 denotes a fastener, which is formed of a flat head screw and has a head buried in one side of the L-shape fitted into the recess 23 of the mounting bracket 24, and is inserted through one side of the L-shape to the tension wheel 4. Screwed. Reference numeral 26 denotes a cushioning piece, which is made of a viscoelastic material such as rubber and is adhered to the outer surface of the other side of the L-shaped mounting bracket 24 with an adhesive, and the upper surface forms the apparent outer diameter of the tension wheel 4.
The roller 13 of the tread chain 6 is supported to reduce the sound of engagement between the tensioner 4 and the roller 13.

In the tensioning device for a treadle chain of the passenger conveyor configured as described above, the passenger conveyor is operated in the same manner as in the above-described embodiment of FIGS. 1 to 5, and the tensioning wheel 4 is provided with a buffer piece 26. . Therefore, although detailed description is omitted, FIG. 1 and FIG.
The same operation as the embodiment of FIG.

Further, when replacing the deteriorated cushioning piece 21 of the tensioning wheel 4, there is no need to fit the buffering piece 26 into the fitting groove 10 of the tensioning wheel 4, and an insertion hole is provided in the buffering piece 26. Therefore, it is not necessary to insert the fastener 23. Then, the fastener 22 is operated from the direction of the arrow D or the arrow E shown in FIG.
Can be attached and detached. For this reason, the work of replacing the deteriorated buffer piece 21 of the tension wheel 4 can be easily performed, and the work efficiency can be improved.

[0043]

As described above, according to the present invention, a large number of treads of a passenger conveyor are connected to each other to form an endless shape, and the tread chain and the rim which circulate and move in the main frame of the passenger conveyor are fitted along the rotation direction. A groove is recessed, is provided at an end of the main frame, is provided so as to be displaceable in the longitudinal direction of the main frame, and a tension wheel on which a tread chain is wound to apply tension to the tread chain, and the ends are adjacent to each other. And a plurality of cushioning pieces which are fitted in the fitting grooves, fastened to the tension wheel by fasteners, and support the rollers of the tread chain.

As a result, the tensioner is provided with a cushioning piece to support the rollers of the tread chain, thereby reducing the sound of engagement between the tensioner and the rollers, thereby quieting the operation of the passenger conveyor.
Further, when replacing the degraded cushioning pieces of the tension wheel, the buffer pieces are sequentially removed from the tension wheel by work at a non-wound portion where the tread chain is not wound on the tension wheel. And the buffer piece updated by the work in the unwound portion of the tread chain in the tension wheel is sequentially mounted on the tension wheel. For this reason, it is possible to easily replace the shock-absorbing piece of the tension wheel around which the endless chain of treads is wound, and there is an effect that the working time is reduced and the cost of the work of replacing the shock-absorbing piece is reduced.

Further, as described above, the present invention is constructed in such a manner that a plurality of treads of a passenger conveyor are connected to each other to form an endless shape, and a tread chain which circulates and moves within the main frame of the passenger conveyor, is provided at an end of the main frame. And a tension wheel, which is displaceable in the longitudinal direction of the main frame, and on which a tread chain is wound to apply tension to the tread chain, and an end which is adhered to the surface of a mounting bracket made of an arcuate piece by an adhesive, and the ends are attached to each other. A plurality of adjoiningly arranged rings form a ring, and are arranged on the rim surface of the tensioning wheel via the back surface of the mounting bracket, and are respectively fastened to the tensioning wheel by fasteners to support the rollers of the tread chain. Are provided.

As a result, the tensioner is provided with the cushioning pieces to support the rollers of the tread chain, and the engagement sound between the tensioner and the rollers is reduced, so that the operation of the passenger conveyor is reduced.
Further, when replacing the deteriorated cushioning pieces of the tension wheel, the buffer pieces attached to the mounting brackets are sequentially removed from the tension wheel by working at a non-wound portion where the tread chain is not wound on the tension wheel. Then, the updated cushioning pieces mounted on the mounting brackets are sequentially mounted on the tension wheel by the work at the unwound portion of the tread chain in the tension wheel. For this reason, it is possible to easily replace the shock-absorbing piece of the tension wheel around which the endless chain of treads is wound, and there is an effect that the working time is reduced and the cost of the work of replacing the shock-absorbing piece is reduced.

Further, as described above, the present invention is provided with a buffer piece that forms a ring by at least three pieces.

As a result, the tensioner is provided with a cushioning piece to support the rollers of the tread chain, thereby reducing the sound of engagement between the tensioner and the rollers, thereby reducing the operation of the passenger conveyor.
Further, when replacing the degraded cushioning pieces of the tension wheel, the buffer pieces forming the ring by at least three pieces are sequentially from the tension wheel by the work at the non-winding point where the tread chain is not wound on the tension wheel. The cushion pieces which are removed and updated by the work at the non-winding point are sequentially mounted on the tensioner. For this reason, it is possible to easily replace the shock-absorbing piece of the tension wheel around which the endless chain of treads is wound, and there is an effect that the working time is reduced and the cost of the work of replacing the shock-absorbing piece is reduced.

Further, as described above, according to the present invention, the length of the tension wheel at the rotation center of the tension wheel is such that the pitch angle of the roller of the tread chain does not become 360 ° even if it is multiplied by any integer. The total outer peripheral length of the buffer piece formed on the outer periphery is set.

Thus, the tensioning wheel is provided with the cushioning pieces to support the rollers of the tread chain, and the engaging sound between the tensioning wheel and the roller is reduced, so that the operation of the passenger conveyor is reduced.
Further, when replacing the deteriorated cushioning pieces of the tension car, the cushioning pieces are sequentially removed from the tension car by work at an unwound portion where the tread chain is not wound on the tension car,
The buffer piece updated by the work at the non-winding point of the tread chain is sequentially mounted on the tensioner. For this reason, it is possible to easily replace the shock-absorbing piece of the tension wheel around which the endless chain of treads is wound, and there is an effect that the working time is reduced and the cost of the work of replacing the shock-absorbing piece is reduced. In addition, the total length of the buffer pieces is set to a length at which a relationship that does not become 360 ° even if the pitch angle of the roller of the tread chain is multiplied by any integer is set. The roller of the tread chain does not hit the same position in the direction. For this reason, there is an effect of preventing the problem that the roller constantly hits the same position in the longitudinal direction of the buffer piece and the wear progresses.

Further, as described above, according to the present invention, the pitch angle of each buffer piece at the rotation center of the tension wheel is set to an angle that does not become an integral multiple of the pitch angle of the rollers of the tread chain at the rotation center of the tension wheel. It was done.

Thus, the tensioner is provided with the cushioning pieces to support the rollers of the tread chain, thereby reducing the sound of engagement between the tensioner and the roller, thereby reducing the operation of the passenger conveyor.
Further, when replacing the degraded cushioning pieces of the tension car, the cushion pieces are sequentially removed from the tension car by work at the non-wound portion where the tread chain is not wound on the tension car,
The buffer piece updated by the work at the non-winding point of the tread chain is sequentially mounted on the tensioner. For this reason, it is possible to easily replace the shock-absorbing piece of the tension wheel around which the endless chain of treads is wound, and there is an effect that the working time is reduced and the cost of the work of replacing the shock-absorbing piece is reduced. Further, since the pitch angle of each buffer piece is set to an angle that does not become an integral multiple of the pitch angle of the roller of the tread chain, the rollers of the tread chain do not face each other at the joint between the respective buffer pieces. Therefore,
When the rollers of the tread chain are fitted into all the joints at the same time, there is an effect of preventing a trouble such as vibration from occurring in the tread chain.

Further, as described above, according to the present invention, from the outside of the side wall on one side of the fitting groove of the tension wheel, the cushion is inserted into the side wall and the buffer piece fitted in the fitting groove of the tension wheel, A fastening tool screwed into the other side wall of the fitting groove of the tension wheel is provided.

As a result, the tensioner is provided with a cushioning piece to support the rollers of the tread chain, thereby reducing the sound of engagement between the tensioner and the roller, thereby reducing the operation of the passenger conveyor.
Further, when replacing the deteriorated cushioning pieces of the tension car, the cushioning pieces are sequentially removed from the tension car by work at an unwound portion where the tread chain is not wound on the tension car,
The buffer piece updated by the work at the non-winding point of the tread chain is sequentially mounted on the tensioner. For this reason, it is possible to easily replace the shock-absorbing piece of the tension wheel around which the endless chain of treads is wound, and there is an effect that the working time is reduced and the cost of the work of replacing the shock-absorbing piece is reduced. In addition, since the buffer can be attached and detached by operating the fastener from the side of the edge of the tension wheel, the fastener can be easily operated at the time of replacing the degraded buffer piece of the tension wheel, thereby improving work efficiency. effective.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention, and is a side view conceptually showing a lower end portion of a main frame of an escalator.

FIG. 2 is an enlarged view of a tensioner in the escalator of FIG.

FIG. 3 is an enlarged view of a portion A in FIG. 2;

FIG. 4B illustrates a state in which the tread chain is wound around,
B sectional drawing.

FIG. 5 is a process chart of an operation of replacing a cushioning material in the escalator of FIG. 1;

FIG. 6 is an enlarged view of a tension wheel portion in the escalator according to the second embodiment of the present invention, and is a view corresponding to a main part of FIG. 1 described above.

FIG. 7 is a view showing a third embodiment of the present invention, and is an enlarged view of a tension wheel portion in the escalator, and is a view corresponding to a main part of FIG. 1 described above.

8 is a sectional view of a main part of FIG. 7 and is a view corresponding to FIG. 4 described above.

FIG. 9 is a plan view of FIG. 7;

FIG. 10 is a view showing a fourth embodiment of the present invention, and is a view corresponding to FIG. 4 described above.

FIG. 11 is a side view of the buffer piece portion shown in FIG. 10;

FIG. 12 is a side view conceptually showing an escalator, showing a conventional tread chain tensioning device for a passenger conveyor.

FIG. 13 is an enlarged cross-sectional view of a tension wheel edge portion of the escalator of FIG. 12;

[Explanation of symbols]

1 main frame, 4 tension car, 6 tread chain, 7 tread, 10
Fitting groove, 13 rollers, 15 cushioning pieces, 16 fasteners,
19 buffer pieces, 21 buffer pieces, 22 fasteners, 24 mounting brackets, 25 fasteners, 26 buffer pieces, θ pitch angle of the buffer pieces at the rotation center of the tensioner, φ roller of the tread chain at the rotation center of the tensioner Pitch angle.

Claims (6)

[Claims] A passenger conveyor has a plurality of treads connected to each other to form an endless shape. A tread chain and a rim circulating in the main frame of the passenger conveyer are provided with recesses in a fitting groove along a rotation direction. A tension wheel, which is provided at an end of the frame and is displaceably provided in the longitudinal direction of the main frame, is wound around the tread chain and applies tension to the tread chain, and the ends are arranged adjacent to each other. And a plurality of cushions that are fitted in the fitting grooves and fastened to the tension wheel by fasteners, respectively, and that support the rollers of the tread chain. apparatus. 2. A plurality of treads of a passenger conveyor are connected to each other to form an endless chain, and a tread chain that circulates and moves within a main frame of the passenger conveyor, is provided at an end of the main frame, and extends in a longitudinal direction of the main frame. And a tensioning wheel, which is displaceably mounted on the tread chain and is wound around the tread chain to apply tension to the tread chain, and the end portions are arranged adjacent to each other and adhered to the surface of a mounting bracket made of an arc-shaped piece by an adhesive. A cushion is formed on the rim surface of the tension wheel via the back surface of the mounting bracket, and is respectively fastened to the tension wheel by a fastener to support the roller of the tread chain. A passenger conveyor tread chain tensioning device comprising: 3. The tread chain tensioning device for a passenger conveyor according to claim 1, wherein at least three cushioning pieces form an annular shape. 4. The total outer peripheral length of the buffer piece formed on the outer periphery of the tension wheel does not become 360 ° when the pitch angle of the rollers of the tread chain at the center of rotation of the tension wheel is multiplied by any integer. The tension device according to any one of claims 1 and 2, wherein the length is set so that the relationship is established. 5. The pitch angle of each cushioning piece at the rotation center of the tension wheel is set to an angle that is not an integral multiple of the pitch angle of the rollers of the tread chain at the rotation center of the tension wheel. A tread chain tensioning device for a passenger conveyor according to any one of claims 1 and 2. 6. A fastener is inserted from the outside of one side wall of the fitting groove of the tensioning wheel into the side wall and the buffer piece fitted in the fitting groove, and is connected to the other side of the fitting groove. The tread chain tensioning device for a passenger conveyor according to any one of claims 1 to 3, wherein the tension device is screwed into a side wall.