CN104260750A - Coal mine heavy sliding prevention device - Google Patents
Coal mine heavy sliding prevention device Download PDFInfo
- Publication number
- CN104260750A CN104260750A CN201410562364.9A CN201410562364A CN104260750A CN 104260750 A CN104260750 A CN 104260750A CN 201410562364 A CN201410562364 A CN 201410562364A CN 104260750 A CN104260750 A CN 104260750A
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- CN
- China
- Prior art keywords
- car
- keeping
- vertical pier
- rotating shaft
- mining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K7/00—Railway stops fixed to permanent way; Track brakes or retarding apparatus fixed to permanent way; Sand tracks or the like
- B61K7/16—Positive railway stops
Abstract
The invention provides a coal mine heavy sliding prevention device. The coal mine heavy sliding prevention device comprises a stopping beam, a first stand pier, a second stand pier, a mining air cylinder, a mining air cylinder rear base and a connecting device. The mining air cylinder rear base is fixedly onto the floor of an inclined roadway; the cylinder rod of the mining air cylinder is connected with one end of the stopping beam; the first stand pier is rotatably connected with the stopping beam through the connecting device, mounted on one side of the inclined roadway and fixed onto the floor of the inclined roadway, and the first stand pier and the mining air cylinder are arranged on both sides of the stopping beam; the second stand pier is mounted on the other side of the inclined roadway and fixed onto the floor of the inclined roadway for matching with the stopping beam to stopping a tramcar. According to the coal mine heavy sliding prevention device, the stopping beam is mounted on the first stand pier, and the first stand pier is fixed onto the floor of the inclined roadway, so that the problem of mounting, dismounting and maintaining inconvenience due to the fact that the stopping beam is mounted at the top of the inclined roadway can be avoided.
Description
Technical field
The present invention relates to mechanical field, particularly relate to a kind of coal mine heavy buffer stop.
Background technology
In existing colliery, mine car, by rope traction, back and forth transports coal and material installation, realizes the coal of depths at the bottom of ground and material installation to transport in the inclined gallery in colliery.Causing the accident of mine car sport car to occur to prevent occurring that in transportation the steel rope of traction mine car is separated with mine car, in inclined gallery, being provided with beam of keeping off a car.
Beam of keeping off a car is arranged on the top board of inclined gallery, when needing to stop mine car, controls beam whereabouts of keeping off a car, stops mine car motion.Owing to keeping off a car, beam is arranged on the top board of inclined gallery, so need to install in high-altitude beam of keeping off a car, dismantle and keep in repair, and the inconvenience causing installation, dismounting and keep in repair.
In addition, it is less that existing beam of keeping off a car makes strength of material, stopping in the process that mine car and mine car collide, is often damaged; And existing beam of keeping off a car can not enclosing tunnel completely, causes mine car sport car out of control.
Summary of the invention
In view of this, the invention provides a kind of coal mine heavy buffer stop, keep off a car that beam is installed to realize solving, the object of problem of the inconvenience of dismounting and maintenance.
To achieve these goals, the invention provides following technical scheme:
A kind of coal mine heavy buffer stop, comprise beam of keeping off a car, this protective device also comprises:
First vertical pier, the second vertical pier, mining cylinder, mining cylinder rear portion base and connecting device;
Described mining cylinder rear portion base is fixed on the base plate of inclined gallery;
The afterbody of described mining cylinder is arranged on the base of described mining cylinder rear portion;
To keep off a car described in the cylinder bar of described mining cylinder connects one end of beam;
Described first vertical pier and described beam of keeping off a car are rotatably connected by described connecting device, and the described first vertical pier is arranged on the side of inclined gallery, is fixed on the base plate of inclined gallery, the both sides of beam of keeping off a car described in the described first vertical pier and described mining cylinder lay respectively at;
Described second vertical pier is arranged on the opposite side of inclined gallery, is fixed on the base plate of inclined gallery, stops mine car for beam of keeping off a car described in coordinating.
Preferably, described connecting device comprises rotating shaft and is arranged on the bearing at described rotating shaft two ends, and described rotating shaft is fixed on the described first vertical pier, described in beam of keeping off a car be fixedly connected with described bearing respectively.
Preferably, described rotating shaft is bolted on the described first vertical pier.
Preferably, described connecting device comprises rotating shaft, U-shaped clamp, the bearing being arranged on described rotating shaft two ends and the first transverse slat be arranged on the described first vertical pier, the bottom of described rotating shaft is connected on described first transverse slat, described U-shaped clamp blocks described bearing and the described first vertical pier, and described rotating shaft (7) is fixedly connected with described beam of keeping off a car.
Preferably, keep off a car described in described rotating shaft is bolted on beam, described rotating shaft and described keeping off a car between beam are provided with the first backing plate.
Preferably, described U-shaped clamp comprises U-shaped round steel and closing panel, the body of described U-shaped round steel is provided with screw thread, and described U-shaped round steel blocks described bearing and the described first vertical pier, and the two ends that described closing panel is inserted in described U-shaped round steel realize removably connecting by nut.
Preferably, the column of the described first vertical pier and the column of the described second vertical pier are No. 12 mining i beams, the top board of described column welded top 10mm plate iron, the base plate of described column bottom welding 20mm plate iron, the reinforced rib of column both sides welding 20mm triangular steel plate.
Preferably, described in beam of keeping off a car be that No. 12 mining i beams are welded, and described in beam of keeping off a car have multiple hole being connected described mining cylinder with on the plate of described mining cylinder joint.
Preferably, the cylinder club head of described mining cylinder is provided with manipulator, described manipulator comprises the first connecting panel of the cylinder club head being fixed on mining cylinder, the second connecting panel and the 3rd connecting panel, described second connecting panel and described 3rd connecting panel symmetry are fixedly connected on described first connecting panel, and described second connecting panel has with on described 3rd connecting panel the hole be connected with described beam of keeping off a car.
As can be seen from above-mentioned technical scheme, a kind of coal mine heavy buffer stop provided by the invention, comprises beam of keeping off a car, the first vertical pier, the second vertical pier, mining cylinder, mining cylinder rear portion base and connecting device; Mining cylinder rear portion base is fixed on the base plate of inclined gallery; The afterbody of mining cylinder is arranged on the base of mining cylinder rear portion; The cylinder bar of mining cylinder connects the one end of beam of keeping off a car; First vertical pier is rotatably connected by connecting device with beam of keeping off a car, and the first vertical pier is arranged on the side of inclined gallery, is fixed on the base plate of inclined gallery, and the first vertical pier and mining cylinder lay respectively at the both sides of beam of keeping off a car; Second vertical pier is arranged on the opposite side of inclined gallery, is fixed on the base plate of inclined gallery, stops mine car for coordinating beam of keeping off a car.When mining cylinder shrinks, drive beam of keeping off a car to rotate around the first vertical pier, until beam of keeping off a car is blocked by the second vertical pier, coordinate with the second vertical pier, stop mine car motion; When mining cylinder stretches out, drive beam of keeping off a car to rotate around the first vertical pier, be returned to the position that mine car can pass through smoothly.And beam of keeping off a car is arranged on the first vertical pier, the first vertical pier is fixed on the base plate of inclined gallery, avoid sill bolt of keeping off a car is installed at the top of inclined gallery installation, dismounting and inconvenient maintenance problem.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of coal mine heavy buffer stop structural representation that Fig. 1 provides for the embodiment of the present invention one;
A kind of coal mine heavy buffer stop structural representation that Fig. 2 provides for the embodiment of the present invention two;
The mining structural representation of air cylinder of a kind of coal mine heavy buffer stop that Fig. 3 provides for the embodiment of the present invention two;
First vertical pier structure schematic diagram of a kind of coal mine heavy buffer stop that Fig. 4 provides for the embodiment of the present invention two;
The girder construction schematic diagram of keeping off a car of a kind of coal mine heavy buffer stop that Fig. 5 provides for the embodiment of the present invention two;
First backing structure schematic diagram of a kind of coal mine heavy buffer stop that Fig. 6 provides for the embodiment of the present invention three;
The U-shaped clamp structures schematic diagram of a kind of coal mine heavy buffer stop that Fig. 7 provides for the embodiment of the present invention three.
Wherein in Fig. 1-Fig. 7:
The vertical pier 2, second of beam 1, first of keeping off a car founds pier 3, mining cylinder 4, mining cylinder rear portion base 5, connecting device 6, rotating shaft 7, first backing plate 8, U-shaped clamp 9, first transverse slat 10, manipulator 11, column 201, top board 202, base plate 203, reinforced rib 204, U-shaped plate 901, closing panel 902, first connecting panel 1101, second connecting panel 1102, the 3rd connecting panel 1103.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, carry out clear, complete description to the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See a kind of coal mine heavy buffer stop structural representation that Fig. 1, Fig. 1 provide for the embodiment of the present invention one.A kind of coal mine heavy buffer stop provided by the invention, comprises the keep off a car vertical pier of beam 1, first 2, second vertical pier 3, mining cylinder 4, mining cylinder rear portion base 5 and connecting device 6; Mining cylinder rear portion base 5 is fixed on the base plate 203 of inclined gallery; The afterbody of mining cylinder 4 is arranged on mining cylinder rear portion base 5; The cylinder bar of mining cylinder 4 connects the one end of beam 1 of keeping off a car; First vertical pier 2 is rotatably connected by connecting device 6 with beam 1 of keeping off a car, and the first vertical pier 2 is arranged on the side of inclined gallery, is fixed on the base plate 203 of inclined gallery, and the first vertical pier 2 and mining cylinder 4 lay respectively at the both sides of beam 1 of keeping off a car; Second vertical pier 3 is arranged on the opposite side of inclined gallery, is fixed on the base plate 203 of inclined gallery, stops mine car for beam 1 of keeping off a car described in coordinating.
When the contraction of mining cylinder 4, drive beam 1 of keeping off a car to rotate around the first vertical pier 2, until beam 1 of keeping off a car is blocked by the second vertical pier 3, coordinate with the second vertical pier 3, stop mine car motion; When stretching out of mining cylinder 4, drive beam 1 of keeping off a car to rotate around the first vertical pier 2, be returned to the position that mine car can pass through smoothly.Control to keep off a car beam 1 by cylinder, speed.Because the beam 1 of keeping off a car of coal mine heavy buffer stop provided by the invention is arranged on the first vertical pier 2, and the first vertical pier 2 is fixed on the base plate 203 of inclined gallery, avoid beam 1 of keeping off a car is installed at the top of inclined gallery and brings installation, dismounting and inconvenient maintenance problem.
See Fig. 2-Fig. 6, be the coal mine heavy buffer stop that the embodiment of the present invention two provides, the coal mine heavy buffer stop similar that this device and embodiment one provide, only introduces difference, has just repeated no more something in common at this.
The connecting device 6 of this coal mine heavy buffer stop comprises rotating shaft 7 and is arranged on the bearing at rotating shaft 7 two ends, and rotating shaft 7 is fixed on the first vertical pier 2, and beam 1 of keeping off a car is fixedly connected with bearing respectively;
The cylinder club head of mining cylinder 4 is provided with manipulator 11, manipulator 11 comprises the first connecting panel 1101, second connecting panel 1102 and the 3rd connecting panel 1103 of the cylinder club head being fixed on mining cylinder 4, second connecting panel 1102 and the 3rd connecting panel 1103 symmetry are fixedly connected on the first connecting panel 1101, and the second connecting panel 1102 and the 3rd connecting panel 1103 have and beam 1 connecting bore of keeping off a car;
The column 201 of the first vertical pier 2 and the second vertical pier 3 is No. 12 mining i beams, the top board 202 of column 201 welded top 10mm plate iron, the base plate 203 of column 201 bottom welding 20mm plate iron, the reinforced rib 204 of column 201 both sides welding 20mm triangular steel plate;
Beam 1 of keeping off a car is that No. 12 mining i beams are welded, and the plate of keep off a car beam 1 and mining cylinder 4 joint has the hole of multiple connecting mine cylinder 4;
Rotating shaft 7 is bolted on the first vertical pier 2, is provided with the first backing plate 8 between rotating shaft 7 and bolt.
In the present embodiment, rotating shaft 7 is fixed on the first vertical pier 2, bearing is installed respectively in rotating shaft 7 two ends, beam 1 of keeping off a car is fixedly connected with bearing respectively, and the cylinder club head of mining cylinder 4 is provided with manipulator 11, and pinned connection is passed through in the hole that the hole that the second connecting panel 1102 of manipulator 11 and the 3rd connecting panel 1103 have and beam 1 of keeping off a car have, mining cylinder 4 stretches, keep off a car beam 1 and rotating shaft 7 of drive is rotated, thus the Kai Heguan of the beam 1 that realizes keeping off a car, so realize stopping mine car by and permission mine car pass through.
Because the column 201 of the first vertical pier 2 and the column 201 of the second vertical pier 3 are No. 12 mining i beams, the top board 202 of column 201 welded top 10mm plate iron, the base plate 203 of column 201 bottom welding 20mm plate iron, the reinforced rib 204 of column 201 both sides welding 20mm triangular steel plate, the intensity of the first vertical pier 2 and the second vertical pier 3 is higher, not easily causes it to be damaged when beam 1 is kept off a car in mine car collision to the impact of the first vertical pier 2 and the second vertical pier 3.
Because beam 1 of keeping off a car is that No. 12 mining i beams are welded, crash-worthiness is higher, not easily when beam 1 is kept off a car in mine car collision, makes it be damaged.
By being arranged between bolt and rotating shaft 7 by the first backing plate 8, prevent in this coal mine heavy buffer stop operational process, mine car and beam 1 of keeping off a car collide the bolt falling of the connection rotating shaft 7 that causes and the first vertical pier 2.
See Fig. 7, be the coal mine heavy buffer stop that the embodiment of the present invention three provides, the coal mine heavy buffer stop similar that this device and embodiment two provide, only introduces difference, has just repeated no more something in common at this.
This coal mine heavy buffer stop comprises rotating shaft 7, U-shaped clamp 9, the bearing being arranged on rotating shaft 7 two ends and the first transverse slat 10 be arranged on the first vertical pier 2, the bottom of rotating shaft 7 is connected on the first transverse slat 10, U-shaped clamp 9 blocks bearing and the first vertical pier 2, and rotating shaft 7 is fixedly connected with beam 1 of keeping off a car;
Rotating shaft 7 is bolted to connection with beam 1 of keeping off a car, and keeps off a car between beam 1 and rotating shaft 7 and is provided with the first backing plate 8;
U-shaped clamp 9 comprises U-shaped round steel 901 and closing panel 902, and the body of U-shaped round steel 901 is provided with screw thread, and U-shaped round steel 901 blocks bearing and the first vertical pier 2, and the two ends that closing panel 902 is inserted in U-shaped round steel 901 realize removably connecting by nut.
Rotating shaft 7 is fixedly connected with beam 1 of keeping off a car; wherein; the structure of their connection has a lot, and following instance disclose only rotating shaft 7 and is bolted to connection with beam 1 of keeping off a car, but as long as it should be noted that the connection that can realize them is all in protection scope of the present invention.
In the present embodiment, because rotating shaft 7 is fixedly connected with beam 1 of keeping off a car, and the first vertical pier 2 is provided with the first transverse slat 10, the bottom of rotating shaft 7 is connected on the first transverse slat 10, and U-shaped clamp 9 blocks bearing and the first vertical pier 2, and rotating shaft 7 is fixedly connected with beam 1 of keeping off a car.When mining cylinder 4 stretches, drive rotating shaft 7 and beam 1 of keeping off a car to rotate, the Kai Heguan of the beam 1 that realizes keeping off a car, so realize stopping mine car by and permission mine car pass through.
First backing plate 8 is arranged at and keeps off a car between beam 1 and rotating shaft 7, be convenient to bolt to connect keep off a car beam 1 and rotating shaft 7.
" first ", " second ", " the 3rd " in the present invention etc. are in description and distinguish, and do not have other particular meaning.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and inventive features.
Claims (9)
1. a coal mine heavy buffer stop, comprise beam of keeping off a car (1), it is characterized in that, this protective device also comprises:
First vertical pier (2), the second vertical pier (3), mining cylinder (4), mining cylinder rear portion base (5) and connecting device (6);
Described mining cylinder rear portion base (5) is fixed on the base plate of inclined gallery;
The afterbody of described mining cylinder (4) is arranged on described mining cylinder rear portion base (5);
To keep off a car described in the cylinder bar of described mining cylinder (4) connects one end of beam (1);
Described first vertical pier (2) is rotatably connected by described connecting device (6) with described beam of keeping off a car (1), and the described first vertical pier (2) is arranged on the side of inclined gallery, be fixed on the base plate of inclined gallery, the both sides of beam (1) of keeping off a car described in the described first vertical pier (2) lays respectively at described mining cylinder (4);
Described second vertical pier (3) is arranged on the opposite side of inclined gallery, is fixed on the base plate of inclined gallery, stops mine car for beam (1) of keeping off a car described in coordinating.
2. protective device according to claim 1, it is characterized in that, described connecting device (6) comprises rotating shaft (7) and is arranged on the bearing at described rotating shaft (7) two ends, described rotating shaft (7) is fixed on the described first vertical pier (2), described in beam (1) of keeping off a car be fixedly connected with described bearing respectively.
3. protective device according to claim 2, is characterized in that, described rotating shaft (7) is bolted on the described first vertical pier (2).
4. protective device according to claim 1, it is characterized in that, described connecting device (6) comprises rotating shaft (7), U-shaped clamp (9), the bearing being arranged on described rotating shaft (7) two ends and the first transverse slat (10) be arranged on the described first vertical pier (2), the bottom of described rotating shaft (7) is connected on described first transverse slat (10), described U-shaped clamp (9) blocks described bearing and the described first vertical pier (2), and described rotating shaft (7) is fixedly connected with described beam of keeping off a car (1).
5. protective device according to claim 4, it is characterized in that, keep off a car on beam (1) described in described rotating shaft (7) is bolted on, between described rotating shaft (7) and described beam of keeping off a car (1), be provided with the first backing plate (8).
6. protective device according to claim 4, it is characterized in that, described U-shaped clamp (9) comprises U-shaped round steel (901) and closing panel (902), the body of described U-shaped round steel (901) is provided with screw thread, described U-shaped round steel (901) blocks described bearing and the described first vertical pier (2), and the two ends that described closing panel (902) is inserted in described U-shaped round steel (901) realize removably connecting by nut.
7. protective device according to claim 1, it is characterized in that, the column (201) of the described first vertical pier (2) and the column of the described second vertical pier (3) are No. 12 mining i beams, the top board (202) of the steel plate that the welded top 10mm of described column (201) is thick, the base plate (203) of the steel plate that the bottom welding 20mm of described column (201) is thick, the reinforced rib (204) of the triangular steel plate that column both sides welding 20mm is thick.
8. protective device according to claim 1, it is characterized in that, described beam of keeping off a car (1) is that No. 12 mining i beams are welded, and described in beam (1) of keeping off a car have multiple hole being connected described mining cylinder (4) with on the plate of described mining cylinder (4) joint.
9. protective device according to claim 1, it is characterized in that, the cylinder club head of described mining cylinder (4) is provided with the manipulator (11) of beam (1) of keeping off a car described in connection, described manipulator comprises first connecting panel (1101) of the cylinder club head being fixed on mining cylinder (4), second connecting panel (1102) and the 3rd connecting panel (1103), described second connecting panel (1102) and described 3rd connecting panel (1103) symmetry are fixedly connected on described first connecting panel (1101), and described second connecting panel (1102) has with on described 3rd connecting panel (1103) hole be connected with described beam of keeping off a car (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562364.9A CN104260750A (en) | 2014-10-21 | 2014-10-21 | Coal mine heavy sliding prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562364.9A CN104260750A (en) | 2014-10-21 | 2014-10-21 | Coal mine heavy sliding prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104260750A true CN104260750A (en) | 2015-01-07 |
Family
ID=52152386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410562364.9A Pending CN104260750A (en) | 2014-10-21 | 2014-10-21 | Coal mine heavy sliding prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104260750A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201151411Y (en) * | 2008-01-16 | 2008-11-19 | 张全祥 | Pneumatic moveable normal closed door type vehicle stopper |
| US20120012027A1 (en) * | 2010-05-20 | 2012-01-19 | Argent Industrial Limited | Stop device for rail cars and in particular for use with tracks in classification yards |
| CN202345714U (en) * | 2011-12-09 | 2012-07-25 | 神华集团有限责任公司 | Slope ramp electro-pneumatic car stop |
| CN202593559U (en) * | 2012-06-07 | 2012-12-12 | 淮南矿业(集团)有限责任公司 | Trolley stopping door stop device for mine |
| CN202783240U (en) * | 2012-03-21 | 2013-03-13 | 齐俊德 | Remote control hydraulic and automatic vehicle baffle door |
| CN203078550U (en) * | 2012-12-19 | 2013-07-24 | 龙口矿业集团有限公司 | Inclined roadway pneumatic tramcar barrier gate |
| CN203698301U (en) * | 2014-02-15 | 2014-07-09 | 韩秀连 | Inclined roadway normally-closed pneumatic beam interlocking type trolley retaining device |
| CN203844767U (en) * | 2014-04-17 | 2014-09-24 | 永城煤电控股集团有限公司 | Novel vehicle stop system of inclined roadway |
-
2014
- 2014-10-21 CN CN201410562364.9A patent/CN104260750A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201151411Y (en) * | 2008-01-16 | 2008-11-19 | 张全祥 | Pneumatic moveable normal closed door type vehicle stopper |
| US20120012027A1 (en) * | 2010-05-20 | 2012-01-19 | Argent Industrial Limited | Stop device for rail cars and in particular for use with tracks in classification yards |
| CN202345714U (en) * | 2011-12-09 | 2012-07-25 | 神华集团有限责任公司 | Slope ramp electro-pneumatic car stop |
| CN202783240U (en) * | 2012-03-21 | 2013-03-13 | 齐俊德 | Remote control hydraulic and automatic vehicle baffle door |
| CN202593559U (en) * | 2012-06-07 | 2012-12-12 | 淮南矿业(集团)有限责任公司 | Trolley stopping door stop device for mine |
| CN203078550U (en) * | 2012-12-19 | 2013-07-24 | 龙口矿业集团有限公司 | Inclined roadway pneumatic tramcar barrier gate |
| CN203698301U (en) * | 2014-02-15 | 2014-07-09 | 韩秀连 | Inclined roadway normally-closed pneumatic beam interlocking type trolley retaining device |
| CN203844767U (en) * | 2014-04-17 | 2014-09-24 | 永城煤电控股集团有限公司 | Novel vehicle stop system of inclined roadway |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150107 |
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| RJ01 | Rejection of invention patent application after publication |