CN204057625U - Passenger conveyors - Google Patents
Passenger conveyors Download PDFInfo
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- CN204057625U CN204057625U CN201420255806.0U CN201420255806U CN204057625U CN 204057625 U CN204057625 U CN 204057625U CN 201420255806 U CN201420255806 U CN 201420255806U CN 204057625 U CN204057625 U CN 204057625U
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- fishback
- passenger conveyors
- detection
- teeth portion
- switch
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- 238000001514 detection method Methods 0.000 claims abstract description 85
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000006378 damage Effects 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Escalators And Moving Walkways (AREA)
Abstract
The utility model relates to passenger conveyors, has: the multiple steps in passenger conveyors; Be arranged at the caterpillar block face of each described step; Lifting board, is placed in the stopping port of described passenger conveyors; Fishback, is arranged at the front end of described lifting board, and for having the comb teeth-shaped of multiple teeth portion, each described teeth portion moves respectively in each valley in described caterpillar block face; Detection lug, is arranged at each valley in the described caterpillar block face of step described at least one among multiple described step and detection step, and, rotated by the described teeth portion pressing of described fishback; Switch, is arranged at described detection step, is operated by the described detection lug that be have rotated by described teeth portion; Fishback test section, when described switch has been carried out operation, has exported fishback detection signal; And control setup, when not inputting described fishback detection signal, exporting fishback and damaging signal, even if the teeth portion of fishback is damaged also this destruction can be detected.
Description
Quoting of association request: the application, based on No. 2014-57407, Japanese patent application (applying date: on March 20th, 2014), enjoys the benefit of priority of this application.The application comprises this application full content by referring to this application.
Technical field
Embodiment of the present utility model relates to passenger conveyors.
Background technology
In the passenger conveyors such as the footway of escalator or movement, its stopping port is provided with lifting board.In order to prevent passenger from this lifting board to step time pin stumble on lifting board or pin is clipped in step and lifting board, the front end of lifting board is provided with fishback.Multiple teeth portion of the front end of this fishback are formed as comb teeth-shaped, and the valley being configured to the caterpillar block face arranged with the upper surface at step engages with contactless state.
If accompany foreign matter etc. between this fishback and the caterpillar block face of step, this foreign matter applies stronger stress to teeth portion, then teeth portion can be damaged sometimes.
If make the running of passenger conveyors continue under the damaged state of the teeth portion of fishback, then cannot the pin of the passenger on step or foreign matter etc. be praised on lifting board, likely can be clipped between caterpillar block face and fishback.
Therefore, be provided with the function of the damage of the teeth portion detecting this fishback in the past.Such as, as this measuring ability, make its conducting at fishback internal configurations electroconductive member, carried out the damage of detection comb plate by the change of the current potential of this electroconductive member.
But if the structure at fishback internal configurations electroconductive member as described above, then, when fishback damages, this electroconductive member can expose, and there is the problem that passenger has Danger Electric shock risk.
Utility model content
Embodiment of the present utility model is point in view of the above problems, even if its object is to provide a kind of teeth portion of fishback to damage the passenger conveyors that this destruction also can be detected.
In embodiment of the present utility model, passenger conveyors, has: the multiple steps in passenger conveyors; Be arranged at the caterpillar block face of each described step; Lifting board, is placed in the stopping port of described passenger conveyors; Fishback, is arranged at the front end of described lifting board, and for having the comb teeth-shaped of multiple teeth portion, each described teeth portion moves respectively in each described valley in described caterpillar block face; Detection lug, is arranged at each valley in the described caterpillar block face of step described at least one among multiple described step and detection step, and, rotated by the described teeth portion pressing of described fishback; Switch, is arranged at described detection step, is operated by the described detection lug that be have rotated by described teeth portion; Fishback test section, when described switch has been carried out operation, has exported fishback detection signal; And control setup, when not inputting described fishback detection signal, exporting fishback and damaging signal.
Also can be, in passenger conveyors, the top of described detection lug is given prominence to from the bottom of described valley, and, also do not give prominence to from the upper end of described valley even if the upper end of described detection lug is erected state, the bottom of described detection lug operates described switch by rotating and becomes on-state.
Also can be that, in passenger conveyors, described detection step is one.
Also can be that, in passenger conveyors, only when whole described detection lug is undertaken rotating by the whole described teeth portion of described fishback thus carried out operation to described switch, described fishback test section just exports described fishback detection signal.
Also can be that, in passenger conveyors, described detection has with step and is connected with described switch, for exporting the battery of described fishback detection signal.
Also can be that, in passenger conveyors, each described detection lug is provided with described switch, and described switch is connected in series.
Also can be in passenger conveyors, also have: Machine Room, be positioned at the below of described fishback; Fixed contact, is fixed in described Machine Room, and is connected with described control setup; And wipe contact, be connected with described fishback test section, slide with being electrically connected with described fixed contact along with the movement stating detection step.
Also can be that, in passenger conveyors, described fixed contact is formed as rail-like, described wipe contact moves along railway line described fixed contact.
Also can be that, in passenger conveyors, described fishback is damaged signal to the loud speaker, the telltale output that are arranged at described passenger conveyors by described control setup, or exports to central monitoring position.
Also can be that, in passenger conveyors, described passenger conveyors is the footway of escalator or movement.
According to the present embodiment, even if the teeth portion of fishback 1 damage, also this damage can be detected.
Accompanying drawing explanation
Fig. 1 is the lateral plan of the escalator of present embodiment.
Fig. 2 is the lateral plan of the detection step being in the state being about to the below entering into normal fishback.
Fig. 3 is the lateral plan of the step of the state being in the below having entered into normal fishback.
Fig. 4 is the lateral plan of the detection step of the state being in the below having entered into the fishback with the teeth portion fractureed.
Fig. 5 is the longitudinal section of the detection step of the state being in the below having entered into the fishback with the teeth portion fractureed.
Fig. 6 is the block diagram of the electric formation representing escalator.
Detailed description of the invention
Below, be described based on the passenger conveyors of accompanying drawing to an embodiment of the present utility model.In the present embodiment, based on Fig. 1 ~ Fig. 6, escalator 10 is described.
(1) escalator 10
Based on Fig. 1, the structure of escalator 10 is described.Fig. 1 is instruction diagram when observing escalator 10 from the side.
The truss 12 of escalator 10 by across and building 1 the upper and lower use and support gusset 2,3 and support.
Inner in the Machine Room 14 of the upper layer side being positioned at truss 12 upper end, be provided with actuating device 18.This actuating device 18 has the motor 20 that is made up of induction motor (IM) and the driving chain 22 of action by this motor 20, by this driving chain 22, drive sprocket 24 is rotated.In addition, inner in the Machine Room 14 of upper layer side, be provided with control setup 50.
Inner in the Machine Room 16 of the lower layer side being positioned at truss 12 bottom, be provided with driven sprocket 26, the step chains 28,28 of the ring-type of pair of right and left is hung with between drive sprocket 24 and driven sprocket 26, to be provided with multiple step 30 at equal intervals in pair of right and left step chains 28,28, the wheel 30a of step 30 is in guide rail 27 (with reference to Fig. 2) upper walking, and wheel 30b walks on guide rail 25.
In the left and right sides of truss 12, be equipped with the railing 36,36 of pair of right and left.Handrail 38 moves on the top of this railing 36.Be provided with the front skirt panel 40 that the positive basifacial of the upper layer side of railing 36 is covered, the front skirt panel 42 of lower layer side is provided with at the positive basifacial of lower layer side, from the front of front skirt panel 40,42, be extruded with gangway and the inlet portion 46,48 of handrail 38.At the side lower of railing 36, be provided with skirt panel 44.At the medial surface of front skirt panel 40,42 or skirt panel 44, be respectively arranged with operation board 52,56 and loud speaker 54,58 in levels.In the below of inlet portion 46,48, be respectively arranged with telltale 64,66.
Be provided with the lifting board 32 of upper layer side at the stopping port in the top board face of the Machine Room 14 of upper layer side, be provided with the lifting board 34 of lower layer side at the stopping port in the top board face of the Machine Room 16 of lower layer side.
In the front end of the lifting board 32 of upper layer side, spiral shell only has plastic fishback 60.This fishback 60 there is fishback substrate 602 and from the front end of this fishback substrate 602 to give prominence to the teeth portion 601 into comb teeth-shaped at equal intervals.It is then thinner and flat that teeth portion 601 is formed as more forward end.In addition, lower layer side lifting board 34 also spiral shell only have fishback 62.This fishback 62 also has the structure same with fishback 60.
(2) step 30
Next, based on Fig. 2 and Fig. 5, the structure of step 30 is described.
As shown in Figure 2, step 30 comprises: the step frame 301,301 of the pair of right and left of triangle; Be formed in the caterpillar block face 302 of the upper surface of this step frame 301; And be formed in the kickplate face 303 of front surface of step frame 301; Step frame 301, caterpillar block face 302 and kickplate face 303 are such as formed as one by aluminium die cast.In the front lower portion of step frame 301, be provided with wheel 30a, 30a of pair of right and left in a rotatable manner, be positioned at the step frame 301 of caterpillar block face 302 rearward end, to rotate freely wheel 30b, 30b that mode is provided with pair of right and left.
As shown in Figure 5, at the upper surface in caterpillar block face 302, be alternately formed with the mountain portion 304 and valley 305 that extend along the direct of travel of escalator 10, i.e. fore-and-aft direction.In addition, the mountain portion and valley that extend along the longitudinal is also alternately formed on the surface in kickplate face 303.As shown in Figure 5, in the valley 305 in caterpillar block face 302, the teeth portion 601 of fishback 62 moves engagingly with contactless state.
Among multiple step 30, be provided with the fishback test section 78 of the damage of the teeth portion 601 for detection comb plate 60,62 at 1 step 30.Below this step 30 is called " detection step 30 ".
Detection step 30 longitudinally offers through hole 306 in the substantially central portion of the bottom of each valley 305 in caterpillar block face 302, and the bearing portion 307 of pair of right and left is given prominence to downwards from the bottom of this through hole 306.At the bearing portion 307 of pair of right and left, use S. A. 70 that detection lug 68 is installed in a rotatable manner.This detection lug 68 is that pin is bent into L-shaped, and its top is given prominence to from the through hole 306 be positioned at bottom valley 305, and bottom is outstanding to the below of through hole 306, rotates in front-rear direction.In addition, even if to be in erected state not outstanding from the upper end of valley 305 yet in the upper end of detection lug 68, detection lug 68 can not encounter the pin of passenger.
In the front of through hole 306 and the bottom in caterpillar block face 302, be respectively equipped with switch 74 according to each valley 305.Bar 76 is extruded with from the rear portion of this switch 74.The bar 76 of switch 74 is pressed by the bottom of the detection lug 68 rotated and is operated, and becomes connection (ON) state.At the S. A. 70 of detection lug 68, not shown coil spring is installed, exerts a force all the time to make detection lug 68 be in erected state.Therefore, if detection lug 68 is from the position process of fishback 60, then due to this spring, this detection lug 68 is holded up, thus the on-state of the bar 76 of switch 74 is removed.In addition, at the lower surface in caterpillar block face 302, battery 72 is installed.In addition, the first wipe contact 80 extended from each switch 74 and the second wipe contact 82 are arranged on the below in caterpillar block face 302.
As shown in Figure 2, at the below place being positioned at guide rail 25 of the Machine Room 14 of upper layer side, level is fixed with railway line first fixed contact 84 and second fixed contact 86 of rod type abreast.First wipe contact 80 is mobile along railway line first fixed contact 84 electrical contact, and the second wipe contact 82 is mobile along railway line second fixed contact 86 electrical contact.In addition, the same length of railway line first fixed contact 84 and the length of the second fixed contact 86 and the fore-and-aft direction of fishback 60, is formed as making the length that the first wipe contact 80 can slide in the first fixed contact 84, the second wipe contact 82 can slide in the second fixed contact 86 during the below movement of detection step 30 at fishback 60.
In addition, the position be positioned at below fishback 60 in guide rail 27, is provided with limit switch 88, when detection step 30 moves in the below of fishback 60, makes limit switch 88 become on-state by the step frame 301 of detection step 30.
(3) the electric formation of escalator 10
Next, the electric formation of circuit diagram to escalator 10 based on Fig. 6 is described.
As shown in the circuit diagram of Fig. 6, the switch 74 arranged in each valley 305 of detection step 30 and battery 72 are connected in series, and form fishback test section 78.The both ends of fishback test section 78 are connected with the first wipe contact 80 and the second wipe contact 82.Battery 72 is for exporting fishback detection signal.
Control setup 50 is connected with limit switch 88, only when limit switch 88 becomes on-state, just exports the fishback detection signal from fishback test section 78.
Control setup 50 be connected with loud speaker 54,58, telltale 64,66, motor 20 that actuating device 18 is driven.
In addition, control setup 50 communicates via the wireless central monitoring position 90 with being positioned at distant place.
(4) operating state of escalator 10
Next, the operating state of escalator 10 is described.
The motor 20 of escalator 10 is driven by control setup 50, carries out running usually and step 30 is moved.In addition, illustrate detection step 30 in fig. 2 from left side to the right, namely from lower floor to the state of upper strata movement.
The first, be described based on all unspoiled normal circumstances of all teeth portion 601 of Fig. 2 and Fig. 3 to fishback 60.As shown in Figure 2, during detection step 30 is from lower floor to upper strata movement, detection lug 68 is holded up, and becomes from the outstanding state of the through hole 306 of the valley 305 being positioned at caterpillar block face 302.Whole 74 one-tenth, switch is off (OFF) state.
Next, if as shown in Figure 3, detection step 30 enters the below of fishback 60, then in the valley 305 in caterpillar block face 302, the teeth portion 601 of fishback 60 engages with contactless state.First wipe contact 80 electrically slides contiguously in railway line first fixed contact 84, and the second wipe contact 82 electrically slides contiguously in railway line second fixed contact 86.By the step frame 301 of detection with step 30, make limit switch 88 become on-state, control setup 50 becomes the state of the fishback detection signal that can input from fishback test section 78.Then, by the leading section of the teeth portion 601 of fishback 60 and lower surface, the top of detection lug 68 is rearward rotated centered by S. A. 70, meanwhile, the bar 76 of switch 74 operates by the bottom of the L-shaped of detection lug 68 upward.Thus, this switch 74 becomes on-state.Owing to being all unspoiled normal circumstances of whole teeth portion 601, therefore, whole switch 74 becomes on-state, as shown in the circuit diagram of Fig. 6, become conduction state between first wipe contact 80 and the second wipe contact 82, fishback detection signal is output to control setup 50.
Next, in control setup 50, if limit switch 88 becomes on-state and inputs fishback detection signal from fishback test section 78, be then judged as YES all unspoiled state of whole teeth portion 601 of fishback 60.Therefore, control setup 50 does not send fishback to central monitoring position 90 and destroys signal.
The second, based on Fig. 4 and Fig. 5, the state fractureed is in 1 of fishback 60 teeth portion 601 and is described.If as shown in Figure 4, detection step 30 enters the below of fishback 60, then as described above, in the valley 305 in caterpillar block face 302, the teeth portion 601 of fishback 60 engages with non-contacting state.First wipe contact 80 slides with railway line first fixed contact 84 electrical contact ground, and the second wipe contact 82 electrically slides contiguously in railway line second fixed contact 86.By the step frame 301 of detection with step 30, make limit switch 88 become on-state, control setup 50 becomes the state of the fishback detection signal that can input from fishback test section 78.Then, should to be pressed by the teeth portion 601 of fishback 60 and the detection lug 68 tilted damages due to 1 teeth portion 601 and moves in the below of lifting board 32 with maintain erected state.Therefore, not maintained off-state by pressing upward constant for the bar 76 of switch 74.As shown in the circuit diagram of Fig. 6, the switch 74 be connected in series in fishback test section 78 has 1 to become off-state, therefore can not export fishback detection signal to control setup 50.In addition, teeth portion 601 is not limited to 1 and fractures, and multiple do not export fishback detection signal when fractureing yet.
Next, although control setup 50 is not when limit switch 88 inputs fishback detection signal from fishback test section 78 for on-state, be judged as that teeth portion 601 is damaged.
Next, control setup 50 makes loud speaker 54,58 and telltale 64,66 export fishback and destroys signal, the broadcast impelling attention of " comb of the underfooting of lifting board and the gap of step become large; PLEASE MIND THE STEP is gripped to " is carried out from loud speaker 54,58, in addition, carry out at telltale 64,66 display impelling attention.In addition, control setup 50 exports fishback to central monitoring position 90 and destroys signal, damages to service personnel notice fishback 60.
Also same with fishback 60 at the fishback 62 of lower layer side, control setup 50 is when teeth portion 601 has been damaged, carry out from loud speaker 54,58 broadcast impelling attention, carry out at telltale 64,66 display impelling attention, and then export fishback destruction signal to central monitoring position 90.
(5) effect
According to the present embodiment, as long as the teeth portion 601 of fishback 60,62 has 1 damage, so detection lug 68 does not just rotate and does not make switch 74 become on-state, so, do not export fishback detection signal from fishback test section 78, control setup 50 reliably can judge that the teeth portion 61 of fishback 60 is damaged.
In addition, also do not give prominence to from the upper end of valley 305 even if the upper end of detection lug 68 is erected state, therefore, detection lug 68 can not encounter the pin of passenger.
Detection step 30 does not need to be made up of whole step, is only one, therefore, it is possible to reduce cost.
In addition, the first wipe contact 80 moves in railway line first fixed contact 84, therefore, it is possible to reliably electrical contact.Equally, the second wipe contact 82 also moves in railway line second fixed contact 86, therefore, it is possible to reliably electrical contact.
In addition, control setup 50 only just inputs fishback detection signal when limit switch 88 is in on-state, therefore, only just inputs fishback detection signal when detection step 30 is positioned at below fishback 60,62.
In addition, the teeth portion 601 that the service personnel of central monitoring position 90 reliably can grasp fishback 60,62 based on the fishback damage signal carrying out self-control device 50 is damaged.In addition, passenger also by broadcasting and show the situation that the teeth portion 601 of grasping fishback 60,62 has been damaged, can guarantee its safety.
(6) modification
In the respective embodiments described above, describing switch 74 is the structure pressed by bar 76, but can also use the switch etc. of push type in addition.
In above-mentioned embodiment, be illustrated with escalator 10, but also can replace it and apply present embodiment in the footway of movement.
Foregoing describe an embodiment of the present utility model, but this embodiment is just pointed out as an example, be not intended to the scope limiting utility model.These new embodiments can be implemented in other various modes, can carry out various omission, displacement, change in the scope of purport not departing from utility model.In the scope that these embodiments and distortion thereof are included in utility model and main idea, and in the utility model be included in described in claims and equivalent scope thereof.
Claims (10)
1. a passenger conveyors, wherein, has:
Multiple steps in passenger conveyors;
Be arranged at the caterpillar block face of each described step;
Lifting board, is placed in the stopping port of described passenger conveyors;
Fishback, is arranged at the front end of described lifting board, and for having the comb teeth-shaped of multiple teeth portion, each described teeth portion moves respectively in each valley in described caterpillar block face;
Detection lug, is arranged at each valley in the described caterpillar block face of step described at least one among multiple described step and detection step, and, rotated by the described teeth portion pressing of described fishback;
Switch, is arranged at described detection step, is operated by the described detection lug that be have rotated by described teeth portion;
Fishback test section, when described switch has been carried out operation, has exported fishback detection signal; And
Control setup, when not inputting described fishback detection signal, exporting fishback and damaging signal.
2. passenger conveyors as claimed in claim 1, wherein,
The top of described detection lug is given prominence to from the bottom of described valley, and, also do not give prominence to from the upper end of described valley even if the upper end of described detection lug is erected state,
The bottom of described detection lug operates described switch by rotating and becomes on-state.
3. passenger conveyors as claimed in claim 1, wherein,
Described detection step is one.
4. passenger conveyors as claimed in claim 1, wherein,
Only when whole described detection lug is undertaken rotating by the whole described teeth portion of described fishback thus carried out operation to described switch, described fishback test section just exports described fishback detection signal.
5. passenger conveyors as claimed in claim 1, wherein,
Described detection has with step and is connected with described switch, for exporting the battery of described fishback detection signal.
6. passenger conveyors as claimed in claim 1, wherein,
Each described detection lug is provided with described switch, and described switch is connected in series.
7. passenger conveyors as claimed in claim 1, wherein, has:
Machine Room, is positioned at the below of described fishback;
Fixed contact, is fixed in described Machine Room, and is connected with described control setup; And
Wipe contact, is connected with described fishback test section, slides with being electrically connected along with the movement stating detection step with described fixed contact.
8. passenger conveyors as claimed in claim 7, wherein,
Described fixed contact is formed as rail-like,
Described wipe contact moves along railway line described fixed contact.
9. passenger conveyors as claimed in claim 1, wherein,
Described fishback is damaged signal to the loud speaker, the telltale output that are arranged at described passenger conveyors by described control setup, or exports to central monitoring position.
10. passenger conveyors as claimed in claim 1, wherein,
Described passenger conveyors is the footway of escalator or movement.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-057407 | 2014-03-20 | ||
| JP2014057407A JP5797800B2 (en) | 2014-03-20 | 2014-03-20 | Passenger conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204057625U true CN204057625U (en) | 2014-12-31 |
Family
ID=52199181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420255806.0U Expired - Lifetime CN204057625U (en) | 2014-03-20 | 2014-05-19 | Passenger conveyors |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5797800B2 (en) |
| CN (1) | CN204057625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946139A (en) * | 2017-05-19 | 2017-07-14 | 合肥工业大学 | Escalator and moving sidewalk fishback safeguard protection detection means and detection method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107010526A (en) * | 2017-05-31 | 2017-08-04 | 天津鑫宝龙电梯集团有限公司 | A kind of stair comb plate switchs detection instrument |
| WO2023187884A1 (en) * | 2022-03-28 | 2023-10-05 | 三菱電機株式会社 | Device for detecting breakage of comb plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06271265A (en) * | 1993-03-24 | 1994-09-27 | Toshiba Erebeeta Technos Kk | Footstep safety device for escalator |
| DE19950868A1 (en) * | 1999-10-21 | 2001-05-10 | Otis Elevator Co | Passenger conveyor gap monitoring device |
-
2014
- 2014-03-20 JP JP2014057407A patent/JP5797800B2/en active Active
- 2014-05-19 CN CN201420255806.0U patent/CN204057625U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946139A (en) * | 2017-05-19 | 2017-07-14 | 合肥工业大学 | Escalator and moving sidewalk fishback safeguard protection detection means and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5797800B2 (en) | 2015-10-21 |
| JP2015178415A (en) | 2015-10-08 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20141231 |