CN111556849B - Step of escalator capable of visually confirming fixing state with step shaft - Google Patents
Step of escalator capable of visually confirming fixing state with step shaft Download PDFInfo
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- CN111556849B CN111556849B CN201880084409.2A CN201880084409A CN111556849B CN 111556849 B CN111556849 B CN 111556849B CN 201880084409 A CN201880084409 A CN 201880084409A CN 111556849 B CN111556849 B CN 111556849B
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- shaft
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- escalator
- step shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
- B66B23/08—Carrying surfaces
- B66B23/12—Steps
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- Escalators And Moving Walkways (AREA)
Abstract
The purpose of the present invention is to provide a step (5) of an escalator (1), wherein the fixed state of the step (5) and a step shaft (4) can be more reliably visually confirmed even when garbage or the like adheres to the step (5). The step (5) is provided with a step (8), a sleeve (12), and a raised portion (21). The footplate (8) has a flat surface on which a user (P) rides during operation. The shaft sleeve (12) is provided below the step plate (8) and fixes the step plate (8) to the step shaft (4). The inner surface (16) of the sleeve (12) is opposite to the step shaft (4). The raised portion (21) does not protrude from the inner surface (16) when the step (8) is fixed to the step shaft (4). When the step (8) is not fixed to the step shaft (4), the free end (24) of the raised portion (21) protrudes from the inner surface (16), and the step (8) is raised from the step shaft (4) and tilted.
Description
Technical Field
The present invention relates to steps of escalators.
Background
Patent document 1 describes an example of a step of an escalator. The step is provided with a fixing part for fixing the pedal and the step shaft. The fixing portion includes a rod and a spring on the outside. When the step is not fixed to the step shaft, the lever lifts the step from the step shaft by the elastic force of the spring to tilt the step. The maintenance worker can visually confirm the fixed state of the step and the step shaft according to the inclination of the step.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 10-120351
Disclosure of Invention
Problems to be solved by the invention
However, there is a possibility that dust and the like falling from the soles and the like of the users of the escalator may adhere to the bars and springs of the steps of patent document 1. When dust or the like adheres, the lever or the spring may be immobilized by biting into the dust or the like. At this time, even when the step is not fixed to the step shaft, the step is not lifted.
The present invention has been made to solve the above problems. The invention aims to provide a step of an escalator, which can more reliably visually confirm the fixed state of the step and a step shaft even if garbage and the like are adhered to the step.
Means for solving the problems
The step of the escalator of the invention comprises: a step having a plane on which a user rides when the escalator is in operation; a fixing portion provided below the step plate to fix the step plate to the step shaft; and a raised portion that does not protrude from an inner surface of the fixing portion facing the step shaft when the step is fixed to the step shaft, and that is raised and inclined from the step shaft by a portion of the raised portion protruding from the inner surface when the step is not fixed to the step shaft.
Effects of the invention
According to the present invention, the step includes a step plate, a fixing portion, and a raised portion. The step has a flat surface on which a user rides during operation. The fixing portion is provided below the step plate to fix the step plate to the step shaft. The inner surface of the fixing portion is opposed to the step shaft. The raised portion does not protrude from the inner surface when the step is fixed to the step shaft. When the step is not fixed to the step shaft, a part of the raised portion protrudes from the inner surface, and the step is raised from the step shaft and tilted. Thus, even when dust or the like adheres to the step, the maintenance worker can more reliably visually confirm the fixed state between the step and the step shaft.
Drawings
Fig. 1 is a configuration diagram of an escalator including steps according to the first embodiment.
Fig. 2 is a side view of the step of the first embodiment.
Fig. 3 is an enlarged perspective view of a main portion of the step according to the first embodiment.
Fig. 4 is an enlarged side view of a main portion of the step according to the first embodiment.
Fig. 5 is a side view of the step of the first embodiment.
Fig. 6 is an enlarged side view of a main portion of a step according to a modification of the first embodiment.
Fig. 7 is an enlarged side view of a main portion of the step according to the second embodiment.
Detailed Description
A mode for carrying out the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and overlapping description is appropriately simplified or omitted.
Implementation mode one
Fig. 1 is a structural view of an escalator including steps according to the present embodiment.
In fig. 1, the left-right direction of the escalator 1 is a direction perpendicular to the paper surface. In fig. 1, the front-rear direction of the escalator 1 is the left-right direction of the paper.
In fig. 1, an upper landing entrance 2a is provided at an upper portion of the escalator 1. The lower landing entrance 2b is provided at the lower portion of the escalator 1.
The upper machine room 3a is provided in the upper part of the escalator 1. The upper machine room 3a is provided below the upper landing entrance 2 a. The lower machine room 3b is provided in the lower part of the escalator 1. The lower machine room 3b is provided below the lower landing entrance 2 b.
The escalator 1 includes a plurality of step shafts 4, a plurality of steps 5, a pair of handrails 6, a driving device not shown, and a control panel 7.
The plurality of step shafts 4 are connected in a ring shape.
Each step 5 of the plurality of steps 5 is fixed to each step shaft 4 of the plurality of step shafts 4. The plurality of steps 5 are arranged in a ring shape. Each of the plurality of steps 5 includes a tread plate 8. The step 8 has a flat surface on which the user P rides when the escalator 1 is running.
One of the pair of handrails 6 is provided on the left side of the plurality of steps 5. The other of the pair of handrails 6 is provided to the right of the plurality of steps 5. The pair of armrests 6 are each formed in a ring shape.
The drive means is provided in the upper machine room 3 a.
The control panel 7 is provided in the upper machine room 3 a.
The control panel 7 controls the operation of the drive device. The drive device circulates the plurality of step shafts 4 with the upper side as the forward path. Each step 5 of the plurality of steps 5 moves cyclically in synchronization with each step shaft 4 of the plurality of step shafts 4. The steps 5 moving on the forward path are arranged in a step shape in the fixed inclined portion of the escalator 1. A pair of handrails 6 circulates in synchronization with the plurality of steps 5.
When the escalator 1 is in an ascending operation, the user P grasps one of the pair of handrails 6 and rides on the steps 8 of the steps 5 from the lower landing entrance 2 b. The user P rides on the steps 8 of the steps 5 moving on the forward path and moves to the upper landing entrance 2 a.
When the escalator 1 is descending, the user P grasps one of the pair of handrails 6 and rides on the steps 8 of the steps 5 from the upper landing entrance 2 a. The user P rides on the steps 8 of the steps 5 moving on the forward path and moves toward the lower landing entrance 2 b.
Next, the structure of the step 5 will be described with reference to fig. 2 and 3.
Fig. 2 is a side view of the step of the present embodiment. Fig. 3 is an enlarged perspective view of a main portion of the step of the present embodiment.
Fig. 2 shows a state in which the step 5 is fixed to the step shaft 4.
The step shaft 4 includes a pair of bearings 9. Each of the pair of bearings 9 is provided rotatably about the central axis of the step shaft 4. The pair of bearings 9 are each, for example, a nylon bush. One of the pair of bearings 9 is disposed on one side of the step shaft 4 in the left-right direction. The other of the pair of bearings 9 is disposed on the other side of the step shaft 4 in the left-right direction.
The step 5 includes a riser 10, a pair of brackets 11, and a pair of bushings 12.
The riser 10 hangs down from one edge portion in the front-rear direction of the tread plate 8.
One of the pair of brackets 11 connects one side of the step panel 8 and one side of the riser 10. The other of the pair of brackets 11 connects the other side of the step panel 8 to the other side of the riser 10.
The sleeve 12 is an example of a fixed portion. One of the pair of bosses 12 is provided at a lower portion of one of the pair of brackets 11. The other of the pair of bosses 12 is provided at a lower portion of the other of the pair of brackets 11. The pair of bushings 12 are disposed below the pedal 8 on the opposite side of the pedal 8 from the riser 10 in the front-rear direction.
Each of the pair of bushings 12 includes an upper bushing 13 and a lower bushing 14.
The upper boss 13 is an example of an upper fixing portion. The upper boss 13 is fixed to the bracket 11. The upper boss 13 has a fastening hole 15. The fastening hole 15 penetrates through an end portion opposite to the riser 10 in the front-rear direction from above to below. The fastening hole 15 is an internal threaded portion. The upper sleeve 13 has an inner surface 16. The inner surface 16 is disposed rearward of the fastening hole 15. The inner surface 16 is curved in a semicircular shape. The inner surface 16 faces the outer periphery of the bearing 9 of the step shaft 4 from above.
The upper boss 13 is an example of a lower fixing portion. The lower bushing 14 is connected to the upper bushing 13 so as to be rotatable about the horizontal direction of the step 5. The lower boss 14 is coupled to the rear of the inner surface 16 of the upper boss 13. The lower bushing 14 has fastening holes 17. The fastening hole 17 penetrates the same end portion as the fastening hole 15 of the upper boss 13 in the front-rear direction from above downward. The fastening hole 17 is an internal threaded portion. The lower bushing 14 has an inner surface 18. The inner surface 18 is disposed between the fastening hole 17 and a portion coupled to the upper boss 13. The inner surface 18 is curved in a semicircular shape. The inner surface 18 faces the outer periphery of the bearing 9 of the step shaft 4 from below.
Each of the pair of sleeves 12 is configured to be opened and closed by rotation of the lower sleeve 14. Each of the pair of bushings 12 is fixed to each of the bearings 9 of the step shaft 4 by fastening a bolt 19.
Fig. 3 shows the sleeve 12 in an open state.
The upper bushing 13 has an opening 20 at the inner surface 16.
The step 5 includes a pair of raised portions 21 and a pair of torsion springs 22.
The pair of raised portions 21 are provided on the upper sleeves 13 of the pair of sleeves 12, respectively. The raised portion 21 has a fixed end 23 and a free end 24. The fixed end 23 and the free end 24 are part of the elevation 21.
The fixed end 23 is disposed inside the upper boss 13 from the opening 20. The fixed end 23 does not protrude from the inner surface 16. The fixed end 23 is provided to be rotatable.
The free end 24 is an end portion on the opposite side to the fixed end 23.
The pair of raised portions 21 each have a contact surface 25. The contact surface 25 is curved in a semicircular shape. The curvature of the contact surface 25 is the same as the curvature of the outer side surface of the bearing 9 of the step shaft 4. The contact surface 25 is shaped to be received in the opening 20.
When the boss 12 is not fixed to the step shaft 4, the torsion spring 22 causes the free end 24 of the raised portion 21 to protrude from the opening 20 of the inner surface 16 toward the outside of the upper boss 13 by means of the elastic force.
When the sleeve 12 is fixed to the step shaft 4, each of the pair of raised portions 21 is pressed against the bearing 9 of the step shaft 4 while overcoming the elastic force of the torsion spring 22. At this time, the free end 24 of the raised portion 21 does not protrude from the inner surface 16. The contact surface 25 contacts along the outer side surface of the bearing 9 of the step shaft 4.
Next, a method of visually checking the fixed state of the step 5 and the step shaft 4 will be described with reference to fig. 4 and 5.
Fig. 4 is an enlarged side view of a main portion of the step of the present embodiment. Fig. 5 is a side view of the step of the present embodiment.
Fig. 4 shows a state in which the bushing 12 is not fixed to the step shaft 4 due to forgetting to mount the bolt 19 at the time of maintenance and inspection, loosening of the bolt 19, or the like.
In this case, the free end 24 of the raised portion 21 protrudes from the inner surface 16 by means of the elastic force of the torsion spring 22. The raised portion 21 raises the boss 12 from the step shaft 4. The carrier 11 is lifted with the sleeve 12. The footplate 8 is lifted with the bracket 11.
At this time, the pedal 8 is inclined as shown in fig. 5. The maintenance worker visually recognizes that the step 5 is not fixed to the step shaft 4 in accordance with the inclination of the step 8.
As described above, the step of the escalator of the present embodiment includes the steps 8, the boss 12, and the raised portion 21. The step 8 has a flat surface on which the user P rides when the escalator is running. The bushing 12 is provided below the step plate 8, and fixes the step plate 8 to the step shaft 4. The inner surface 16 of the sleeve 12 is opposite the step axis 4. When the step 8 is fixed to the step shaft 4, the raised portion 21 does not protrude from the inner surface 16. When the step 8 is not fixed to the step shaft 4, the free end 24 of the raised portion 21 protrudes from the inner surface 16, and the step 8 is raised from the step shaft 4 and tilted.
The garbage and the like fall from the soles and the like of the user P when the escalator 1 is in operation. Garbage and the like adhere to the outer side of the step 5. The bushing 12 is fixed while the escalator 1 is running. At this time, the raised portion 21 does not protrude from the inner surface 16. Therefore, the raised portion 21 is not exposed to the outside. The garbage and the like adhering to the outside of the step 5 do not adhere to the raised portion 21. The step 5 prevents the raised portion 21 from being immobilized by biting into small stones, garbage, or the like. When the shaft sleeve 12 is not fixed to the step shaft 4 due to forgetting to attach the bolt 19 or loosening of the bolt 19 during maintenance and inspection, the raised portion 21 tilts the step plate 8. Thus, even when dirt or the like adheres to the outer side of the step 5, the maintenance worker can more reliably visually confirm the fixed state of the step 5 and the step shaft 4.
The raised portion 21 is inside the boss 12. Therefore, the components constituting the step 5 can be made compact. When the steps 5 are removed from the step shafts 4 and transported or stored, the lifting portions 21 do not get in the way.
The step 5 does not need to be provided with a rod outside the sleeve 12. Since the shape of the boss 12 is simple, the manufacturing cost can be suppressed.
Further, the step 5 is provided with a torsion spring 22. When the step 8 is not fixed to the step shaft 4, the torsion spring 22 causes the free end 24 of the raised portion 21 to protrude from the inner surface 16 of the boss 12 facing the step shaft 4 by the elastic force. The lifting portion 21 can lift the pedal 8 with a simple structure.
The raised portion 21 also has a contact surface 25. When the step 8 is fixed to the step shaft 4, the contact surface 25 contacts along the surface of the step shaft 4. The step 5 prevents a gap from being generated between the contact surface 25 and the step shaft 4. The step 5 prevents entry of dust or the like from a gap between the contact surface 25 and the step shaft 4. Therefore, the step 5 can make the visual confirmation of the fixed state of the step 5 and the step shaft 4 more reliable by the maintenance worker.
The sleeve 12 has an upper sleeve 13 facing the step shaft 4 from above. The raised portion 21 is provided in the upper boss 13. Therefore, even when the lower bushing 14 is detached due to breakage or the like, the step 5 can lift the step plate 8 from the step shaft 4 to be inclined.
The pair of raised portions 21 are provided on the pair of bosses 12, respectively. The steps 5 can reduce the load of each torsion spring 22. The lifting portion 21 can lift the pedal 8 with a simpler configuration.
The raised portion 21 may be provided only on one of the pair of bosses 12. When the step 8 is not fixed to the step shaft 4, the lifting portion 21 lifts only one side of the step 8. The steps 5 are inclined in the front-rear direction and the left-right direction. Since the tread plates 8 of the steps 5 to which the tread plates 8 are not fixed are asymmetrically inclined, the difference from the step to which the tread plates 8 are fixed can be easily confirmed by the maintenance worker.
The lifting spring may be a leaf spring, a spiral spring, or the like.
Next, a modification of the first embodiment will be described with reference to fig. 6.
Fig. 6 is an enlarged side view of a main portion of a step according to a modification of the present embodiment.
The pair of bearings 9 each have a fastening hole 26. The fastening hole 26 is an internal threaded portion.
Each of the pair of sleeves 12 includes an upper sleeve 13.
The upper boss 13 is fixed to the bracket 11. The upper boss 13 has a fastening hole 15. The fastening hole 15 penetrates through an end portion opposite to the riser 10 in the front-rear direction from above to below. The fastening hole 15 is an internal threaded portion. The upper sleeve 13 has an inner surface 16. The inner surface 16 is disposed rearward of the fastening hole 15. The inner surface 16 is curved in a semicircular shape. The inner surface 16 faces the outer periphery of the bearing 9 of the step shaft 4 from above.
Each of the pair of bushings 12 is fixed to each of the pair of bearings 9 of the step shaft 4 by fastening of the bolt 19 in the fastening hole 15 and the fastening hole 26.
The raised portion 21 is provided in the upper boss 13. Therefore, even in the bushing 12 not provided with the lower bushing as in the present modification, the step 5 can be tilted by lifting the step plate 8 from the step shaft 4.
Second embodiment
In the present embodiment, a description will be given in detail of an aspect different from the example disclosed in the first embodiment. As for the features not described in the present embodiment, any of the features in the examples disclosed in embodiment one may be adopted.
The structure of the step 5 will be described with reference to fig. 7.
Fig. 7 is an enlarged side view of a main portion of the step of the present embodiment.
The raised portion 21 is a leaf spring. The plate spring is formed by bending a steel plate having elasticity. Steel plates are an example of a resilient material.
The pair of raised portions 21 are provided on the upper sleeves 13 of the pair of sleeves 12, respectively. The raised portion 21 has a fixed end 23 and a free end 24. The fixed end 23 and the free end 24 are part of the elevation 21.
The fixed end 23 is disposed inside the upper boss 13 from the opening 20. The fixed end 23 does not protrude from the inner surface 16. The fixed end 23 is provided to be rotatable.
The free end 24 is an end portion on the opposite side to the fixed end 23.
When the boss 12 is not fixed to the step shaft 4, the free end 24 of the raised portion 21 protrudes from the opening 20 of the inner surface 16 toward the outside of the upper boss 13 by the elastic force.
When the sleeve 12 is fixed to the step shaft 4, each of the pair of raised portions 21 is pressed against the bearing 9 of the step shaft 4 while overcoming its own elastic force. The free end 24 of the raised portion 21 does not protrude from the inner surface 16.
When the bushing 12 is not fixed to the step shaft 4 due to forgetting to attach the bolt 19 or loosening of the bolt 19 during maintenance and inspection, the free end 24 of the raised portion 21 protrudes from the inner surface 16. The lifting portion 21 lifts the boss 12 from the step shaft 4 by its own elastic force. The carrier 11 is lifted with the sleeve 12. The footplate 8 is lifted with the bracket 11.
At this time, the pedal 8 is inclined. The maintenance worker visually recognizes that the step 5 is not fixed to the step shaft 4 in accordance with the inclination of the step 8.
As described above, the steps of the escalator of the present embodiment include the raised portions 21. The raised portion 21 is made of an elastic material. Since the raised portion 21 itself is formed of an elastic material, the number of parts of the step 5 can be reduced. The lifting portion 21 can lift the pedal 8 with a simpler configuration.
Industrial applicability
The steps of the escalator of the present invention can be applied to an escalator system in which the steps are attached to and detached from the step shafts.
Description of the reference symbols
1: an escalator; 2 a: an upper landing port; 2 b: a lower landing port; 3 a: an upper machine room; 3 b: a lower machine room; 4: a step shaft; 5: a step; 6: a handrail; 7: a control panel; 8: a pedal; 9: a bearing; 10: a vertical plate; 11: a bracket; 12: a shaft sleeve; 13: an upper shaft sleeve; 14: a lower shaft sleeve; 15: a fastening hole; 16: an inner surface; 17: a fastening hole; 18: an inner surface; 19: a bolt; 20: an opening; 21: a lifting part; 22: a torsion spring; 23: a fixed end; 24: a free end; 25: a contact surface; 26: a fastening hole.
Claims (5)
1. A step of an escalator, comprising:
a step having a plane on which a user rides when the escalator is in operation;
a fixing portion provided below the step plate to fix the step plate to the step shaft;
the step further includes a lifting portion having a fixed end that does not protrude from an inner surface of the fixed portion facing the step shaft and a free end that is an end portion on a side opposite to the fixed end, wherein when the step plate is fixed to the step shaft, the free end does not protrude from the inner surface, and when the step plate is not fixed to the step shaft, the free end rotates with respect to the fixed portion and protrudes from an opening of the inner surface, whereby the step plate is lifted up and tilted from the step shaft.
2. The escalator step of claim 1,
the step of the escalator includes a lift spring, and the free end of the lift portion protrudes from the opening of the inner surface by an elastic force when the step is not fixed to the step shaft.
3. The escalator step of claim 1,
the lifting portion is made of an elastic material.
4. The escalator step according to any one of claims 1-3,
the raised portion has a contact surface that contacts along a surface of the step shaft when the step plate is fixed to the step shaft.
5. The escalator step according to any one of claims 1-3,
the fixing portion has an upper fixing portion opposed to the step shaft from above,
the raised portion is provided to the upper fixing portion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/005401 WO2019159312A1 (en) | 2018-02-16 | 2018-02-16 | Escalator step allowing visual check of fixed state with respect to step shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111556849A CN111556849A (en) | 2020-08-18 |
| CN111556849B true CN111556849B (en) | 2021-12-31 |
Family
ID=64379132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880084409.2A Active CN111556849B (en) | 2018-02-16 | 2018-02-16 | Step of escalator capable of visually confirming fixing state with step shaft |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6424988B1 (en) |
| CN (1) | CN111556849B (en) |
| WO (1) | WO2019159312A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10120351A (en) * | 1996-10-22 | 1998-05-12 | Mitsubishi Denki Bill Techno Service Kk | Escalator device |
| CN2649551Y (en) * | 2003-06-24 | 2004-10-20 | 上海三菱电梯有限公司 | Axle seat and cover connection structure for stair support |
| CN2716225Y (en) * | 2004-06-28 | 2005-08-10 | 冯国兴 | Safety escalator step |
| CN2769233Y (en) * | 2005-02-04 | 2006-04-05 | 褚雪华 | Safety automatic moving walkway steps |
| CN102040152A (en) * | 2009-10-22 | 2011-05-04 | 株式会社日立制作所 | Passenger conveying equipment |
| CN204549779U (en) * | 2015-03-30 | 2015-08-12 | 日立电梯（广州）自动扶梯有限公司 | Shaft-assembling structure before a kind of outdoor step |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3789972A (en) * | 1972-08-25 | 1974-02-05 | Westinghouse Electric Corp | Transportation device |
| JPH07115818B2 (en) * | 1988-07-05 | 1995-12-13 | 三菱電機株式会社 | Man conveyor tread support device |
-
2018
- 2018-02-16 CN CN201880084409.2A patent/CN111556849B/en active Active
- 2018-02-16 WO PCT/JP2018/005401 patent/WO2019159312A1/en active Application Filing
- 2018-02-16 JP JP2018533280A patent/JP6424988B1/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10120351A (en) * | 1996-10-22 | 1998-05-12 | Mitsubishi Denki Bill Techno Service Kk | Escalator device |
| CN2649551Y (en) * | 2003-06-24 | 2004-10-20 | 上海三菱电梯有限公司 | Axle seat and cover connection structure for stair support |
| CN2716225Y (en) * | 2004-06-28 | 2005-08-10 | 冯国兴 | Safety escalator step |
| CN2769233Y (en) * | 2005-02-04 | 2006-04-05 | 褚雪华 | Safety automatic moving walkway steps |
| CN102040152A (en) * | 2009-10-22 | 2011-05-04 | 株式会社日立制作所 | Passenger conveying equipment |
| CN204549779U (en) * | 2015-03-30 | 2015-08-12 | 日立电梯（广州）自动扶梯有限公司 | Shaft-assembling structure before a kind of outdoor step |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6424988B1 (en) | 2018-11-21 |
| CN111556849A (en) | 2020-08-18 |
| JPWO2019159312A1 (en) | 2020-02-27 |
| WO2019159312A1 (en) | 2019-08-22 |
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Address after: Tokyo, Japan Patentee after: Mitsubishi Electric Building Solutions Co.,Ltd. Address before: Tokyo, Japan Patentee before: MITSUBISHI ELECTRIC BUILDING TECHNO-SERVICE Co.,Ltd. |