CN112081621B - Safety device for mine - Google Patents
Safety device for mine Download PDFInfo
- Publication number
- CN112081621B CN112081621B CN202010957413.4A CN202010957413A CN112081621B CN 112081621 B CN112081621 B CN 112081621B CN 202010957413 A CN202010957413 A CN 202010957413A CN 112081621 B CN112081621 B CN 112081621B
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- Prior art keywords
- fixedly connected
- handle
- adjusting
- frame
- object placing
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- 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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- 230000001681 protective effect Effects 0.000 claims abstract description 33
- 238000013016 damping Methods 0.000 claims description 17
- 229920001971 elastomer Polymers 0.000 claims description 12
- 210000003781 tooth socket Anatomy 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000004816 latex Substances 0.000 abstract description 4
- 229920000126 latex Polymers 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 6
- 238000005065 mining Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Acoustics & Sound (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Pulmonology (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses a safety protection device for mines, which comprises a protective shell, wherein an adjusting gear shaft is movably connected inside the top end of the protective shell, an adjusting disc is fixedly connected to one end of the adjusting gear shaft, a handle is fixedly connected to one side of the surface of the adjusting disc, a sliding sleeve is sleeved on the surface of the handle, an object placing frame is sleeved inside the protective shell, sliding grooves are formed in one side of the back surface of the object placing frame, the number of the sliding grooves is two, a bottom plate is fixedly connected to one side of a latex layer, and a lifting handle is fixedly connected to the top end of the object placing frame. This safety device for mine, through the cooperation setting between protective housing, adjusting gear axle, bolt slider and the fastening handle, when the mine takes place the condition that the mine car derails at a high speed, under the condition not, with a groove of mine way ground dug, place wherein with the protective housing, expose ground with the adjusting disk, occupation space not can not hinder worker people and carry out work.
Description
Technical Field
The invention relates to the technical field of mines, in particular to a safety protection device for a mine.
Background
The mining industry is developed at present, and the mining industry refers to the excavation of naturally occurring minerals such as solids, coal, minerals and the like, including underground excavation on the ground, the operation of mines and all auxiliary work such as crushing, grinding, ore dressing and treatment on processing raw materials generally performed near the sites belong to the activity range of the mining industry, but do not include water collection, purification and distribution, geological exploration, building activities and the like.
The prior safety protection device for mines has the advantages that although the mine car rail is modified and reinforced, the danger of high-speed derailment of the mine car still cannot be avoided, accidents often occur, at the moment, because the space of the mine is narrow and small, no climbing space and no sheltering space exist at all, casualties can easily occur when an accident occurs, and no auxiliary buffer device exists, so that the mine car is impacted after high-speed derailment, the mine car is damaged or even scrapped, the mine car needs to be bought or manufactured again, the engineering time and the money of a manager are wasted, the prior safety protection device for mines also has a guardrail, but occupies space, causes inconvenience for workers, does not have the protection effect on the mine car, the goods are damaged in the mine car, a plurality of mines are unwilling to use the guardrail, and the protection degree of the workers and the mine car in the mines is low, accidents are easy to occur.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a safety protection device for a mine, which solves the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a safety protection device for mines comprises a protective shell, wherein an adjusting gear shaft is movably connected inside the top end of the protective shell, an adjusting disc is fixedly connected to one end of the adjusting gear shaft, a handle is fixedly connected to one side of the surface of the adjusting disc, a sliding sleeve is sleeved on the surface of the handle, a storage frame is sleeved inside the protective shell, a tooth groove is formed in one side of the storage frame, the inner wall of the tooth groove is movably connected with the outer surface of the adjusting gear shaft, sliding grooves are formed in one side of the back face of the storage frame, the number of the sliding grooves is two, the two sliding grooves are symmetrically arranged by taking the center line of the storage frame as a symmetry axis, bolt sliding blocks are slidably connected inside the two sliding grooves, a fastening handle is movably connected to the surface of each bolt sliding block, a hinge block is fixedly connected to the top end of the back face of the storage frame, and a support rod is rotatably connected inside the hinge block, the utility model discloses a storage rack, including bracing piece, thing frame, spacing groove, regulation pole, the one end fixedly connected with backup pad of regulation pole, the spacing groove has been seted up to the inside of putting the thing frame, it has double-layered thing frame to put the thing frame through spacing groove swing joint, the inside fixedly connected with rubber layer of double-layered thing frame, one side fixedly connected with emulsion layer on rubber layer, one side fixedly connected with bottom plate of emulsion layer, the top fixedly connected with handle of putting the thing frame.
Optionally, the inner part of the protective shell is connected with the surface of the bolt sliding block in a penetrating manner.
Optionally, the inside of the adjusting rod is movably connected with a clamping block, and one end of the clamping block is fixedly connected with a return spring.
Optionally, threaded holes are formed in the surface of the supporting plate, the number of the threaded holes is two, and the two threaded holes are symmetrically arranged by taking the center line of the supporting plate as a symmetry axis.
Optionally, one side fixedly connected with damping spring of bottom plate bottom, damping spring's quantity is a plurality of, a plurality of damping spring evenly distributed is in one side of bottom plate, damping spring's one end with put the inside one side fixed connection of thing frame.
(III) advantageous effects
The invention provides a safety protection device for a mine, which has the following beneficial effects:
1. the safety protection device for mines is characterized in that a protective shell, an adjusting gear shaft, an adjusting disc, a handle, a sliding sleeve, a storage frame, a sliding groove, a bolt sliding block and a fastening handle are arranged in a matched mode, when the mine car is derailed at a high speed in a mine, the sliding sleeve is covered to move, the handle moves simultaneously through the relation between the sliding sleeve and the handle, the adjusting disc rotates through the connection relation between the handle and the adjusting disc, the adjusting gear shaft is driven to rotate through the connection relation between the adjusting disc and the adjusting gear shaft, the storage frame ascends through the matching between the adjusting gear shaft and a tooth socket, when the storage frame ascends to a certain position, the fastening handle is twisted to enable the bolt sliding block to limit the protective shell and the storage frame, after danger is over, the fastening handle can be twisted to enable the protective shell to be fastened and loosened with the storage frame, and the handle is shaken, make adjusting disk and adjusting gear shaft rotate, through the setting between adjusting gear shaft and the tooth's socket, make and put the thing frame and withdraw, under the condition that does not, dig a groove with ore road ground, place the protective housing wherein, expose the adjusting disk ground, occupation space does not hinder worker people and carry out work.
2. The safety protection device for the mine is characterized in that the protective shell, the object placing frame, the adjusting gear shaft, the adjusting disc, the handle, the sliding sleeve, the object placing frame, the sliding groove, the bolt sliding block, the fastening handle, the supporting rod, the adjusting rod, the supporting plate and the like are matched, when the mine is in accident of high-speed derailment of a mine car, the object placing frame is lifted from the protective shell to a certain degree through the adjustment of the adjusting gear shaft, the object placing frame and the protective shell are fixed in a limiting mode through twisting the fastening handle, the supporting rod can be pulled open through the hinge block fixedly connected with the back of the object placing frame, the clamping block is pressed down, the clamping block is popped out to be matched and fixed in a limiting mode with the hole formed in the supporting rod through the action of the reset spring when the clamping block reaches the hole formed in the supporting rod, the supporting plate is fixedly connected with one end of the adjusting rod, the adjusting rod is connected with the ground to form a jacking angle to perform secondary limiting on the object placing frame, the object placing frame can assist the impact of a mine car on the object placing frame, when the mine car impacts the device, the damage of the mine car caused by the impact can be prevented through the rubber layer in the object clamping frame, the impact caused by the impact of the mine car on the rubber layer can be secondarily absorbed through the latex layer in the object clamping frame, the impact generated by the impact device of the mine car is absorbed through the damping spring connected with the bottom plate to protect the object placing frame from being damaged due to the impact of the mine car, after dangerous contact, the clamping block is pressed down, the adjusting rod retracts into the supporting rod, when the clamping block reaches the hole formed in the top of the supporting rod, the clamping block is popped out to be matched and limited and fixed with the hole formed in the top of the supporting rod through the action of the reset spring, the supporting rod abuts against the object placing frame through the action of the adjusting gear shaft, make the bracing piece withdraw along with putting the thing frame, during the use, not only can protect the mine car, the staff stands to putting thing board rear, and the device also can protect the staff, and the damage probability of minimize mine car, protection staff's that simultaneously can be fine safety problem.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the protective case of the present invention;
FIG. 3 is a schematic structural view of the object clamping frame according to the present invention;
FIG. 4 is a diagram illustrating a fixture block of the present invention;
FIG. 5 is a schematic view of the adjusting gear shaft of the present invention;
FIG. 6 is a schematic structural view of a bolt slider according to the present invention;
FIG. 7 is an enlarged schematic view of the structure of FIG. 1 at A.
In the figure: 1. a protective shell; 2. adjusting a gear shaft; 3. an adjusting disk; 4. a handle; 5. a sliding sleeve; 6. a placement frame; 7. a chute; 8. a bolt slider; 9. fastening a handle; 10. hinging a block; 11. a support bar; 12. adjusting a rod; 13. a support plate; 14. a limiting groove; 15. an object clamping frame; 16. a rubber layer; 17. a latex layer; 18. a base plate; 19. a damping spring; 20. a handle; 21. a tooth socket; 22. a clamping block; 23. a return spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 7, the present invention provides a technical solution: a safety protection device for mines comprises a protective shell 1, an adjusting gear shaft 2 is movably connected inside the top end of the protective shell 1, an adjusting disc 3 is fixedly connected to one end of the adjusting gear shaft 2, a handle 4 is fixedly connected to one side of the surface of the adjusting disc 3, a sliding sleeve 5 is sleeved on the surface of the handle 4, an object placing frame 6 is sleeved inside the protective shell 1, two sliding grooves 7 are formed in one side of the back of the object placing frame 6, the number of the sliding grooves 7 is two, the two sliding grooves 7 are symmetrically arranged by taking the central line of the object placing frame as a symmetry axis, bolt sliding blocks 8 are respectively connected inside the two sliding grooves 7 in a sliding mode, a fastening handle 9 is movably connected to the surface of each bolt sliding block 8, the bolt sliding blocks 8 are driven to move by twisting the fastening handle 9, the object placing frame 6 and the protective shell 1 are fastened and limited, when the protective shell is not used, the fastening handle 9 is twisted to loosen the bolt sliding blocks 8, thereby the object placing frame 6 can still perform lifting movement in the protective shell 1, the top end of the back of the object placing frame 6 is fixedly connected with a hinge block 10, the inside of the hinge block 10 is rotatably connected with a support rod 11, the inside of the support rod 11 is sleeved with an adjusting rod 12, one end of the adjusting rod 12 is fixedly connected with a support plate 13, the inside of the object placing frame 6 is provided with a limit groove 14, the object placing frame 6 is movably connected with an object clamping frame 15 through the limit groove 14, when the object placing plate 6 receives impact, the object clamping frame 15 moves backwards under the action of the limit groove 14, a certain space is provided for absorbing and weakening impact force, the object clamping frame 15 can not extend out of the object placing plate 6 under the action of the limit groove 14, the object clamping frame 15 is prevented from popping up and being damaged due to impact and the action of a damping spring, the rubber layer 16 is fixedly connected inside the object clamping frame 15, one side of the rubber layer 16 is fixedly connected with a latex layer 17, emulsion layer 17's one side fixedly connected with bottom plate 18, the top fixedly connected with handle 20 of putting thing frame 6, when the thing frame 6 of opposition rises and when descending, the accessible pulling handle is supplementary, prevents that a structure atress is too big, produces the damage, increases the life of device.
One side of the object placing frame 6 is provided with a tooth socket 21, the inner wall of the tooth socket 21 is movably connected with the outer surface of the adjusting gear shaft 2, the object placing frame 6 can be controlled to ascend and descend in the protective shell under the action of the tooth socket 21 and the adjusting gear shaft 2, the inner part of the protective shell 1 is in penetrating connection with the surface of the bolt sliding block 8, the inner part of the adjusting rod 12 is movably connected with a clamping block 22, one end of the clamping block 22 is fixedly connected with a reset spring 23, the clamping block can be matched with different holes formed in the supporting rod 11 under the action of the reset spring 23, the surface of the supporting plate 13 is provided with two threaded holes, the two threaded holes are symmetrically arranged by taking the center line of the supporting plate 13 as a symmetric axis, one side of the bottom plate 18 is fixedly connected with a damping spring 19, the damping springs 19 are arranged in number, and the damping springs 19 are uniformly distributed on one side of the bottom plate 18, damping spring 19's one end and the inside one side fixed connection of putting thing frame 6 can carry out the function of a resorption and protection, better protection device and staff to the impulsive force through damping spring 19's effect.
In the invention, the working steps of the device are as follows:
1. at first, hold sliding sleeve 5, drive handle 4 through sliding sleeve 5, action through handle 4 drives adjusting disk 3 and rotates, through being connected between adjusting disk 3 and the adjusting gear axle 2, make adjusting gear axle 2 rotate, through adjusting gear axle 2 and put being connected between the tooth's socket 21 of offering on the frame 6, thereby make and put thing frame 6 and can rise and descend in protective housing 1, when rising to the certain degree, wrench movement fastening handle 9, the messenger puts thing frame 6 and fixes with protective housing 1.
2. Secondly, when the danger comes temporarily, put thing frame 6 and risen, pull out bracing piece 11, press fixture block 22, make regulation pole 12 stretch out, when fixture block 22 reachd the hole of seting up in bracing piece 11 below, through reset spring 23's effect, make fixture block 22 pop out to reset and cooperate with the hole of seting up on the bracing piece 11, be connected bracing piece 11 with ground through backup pad 13, form a fastening angle, supplementary thing frame 6 is fixed to supplementary its reply is strikeed.
3. Then, the object clamping frame 15 can move in the object placing frame 6 through the limiting groove 14, the impact force is buffered through the matching among the rubber layer 16, the emulsion layer 17 and the damping spring 19, when a mine car impacts on the rubber layer 16, the device absorbs the impact force, and the rubber layer can play a certain protection role on the mine car.
4. Finally, after the accident is finished, the clamping block 22 is pressed down, the adjusting rod 12 and the supporting rod 11 are retracted together to be close to the back face of the placing frame 6, the adjusting gear shaft 2 is rotated, the placing frame 6 falls down to be retracted into the protective shell 1, and when the placing frame rises and falls, damage to a certain structure due to overlarge load can be prevented through the handle 20, so that the service life of the device can be prolonged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The utility model provides a safety device for mine, includes protective housing (1), its characterized in that: the inner part of the top end of the protective shell (1) is movably connected with an adjusting gear shaft (2), one end of the adjusting gear shaft (2) is fixedly connected with an adjusting disc (3), one side of the surface of the adjusting disc (3) is fixedly connected with a handle (4), the surface of the handle (4) is sleeved with a sliding sleeve (5), the protective shell (1) is sleeved with an object placing frame (6), one side of the object placing frame (6) is provided with a tooth socket (21), the inner wall of the tooth socket (21) is movably connected with the outer surface of the adjusting gear shaft (2), one side of the back of the object placing frame (6) is provided with a sliding groove (7), the number of the sliding grooves (7) is two, the two sliding grooves (7) are symmetrically arranged by taking the central line of the object placing frame as a symmetrical axis, the inner parts of the two sliding grooves (7) are both slidably connected with a bolt sliding block (8), and the surface of the bolt sliding block (8) is movably connected with a fastening handle (9), the utility model discloses a novel article-putting device, including put top fixedly connected with hinge piece (10) at thing frame (6) back, the inside of hinge piece (10) rotates and is connected with bracing piece (11), the inside of bracing piece (11) has cup jointed regulation pole (12), the one end fixedly connected with backup pad of regulation pole (12), spacing groove (14) have been seted up to the inside of putting thing frame (6), put thing frame (6) and have pressed from both sides thing frame (15) through spacing groove (14) swing joint, the inside fixedly connected with rubber layer (16) of pressing from both sides thing frame (15), one side fixedly connected with emulsion layer (17) on rubber layer (16), one side fixedly connected with bottom plate (18) of emulsion layer (17), the top fixedly connected with handle (20) of putting thing frame (6).
2. The safety device for the mine according to claim 1, characterized in that: the inner part of the protective shell (1) is in penetrating connection with the surface of the bolt sliding block (8).
3. The safety device for the mine according to claim 1, wherein: the inside swing joint of adjusting pole (12) has fixture block (22), the one end fixedly connected with reset spring (23) of fixture block (22).
4. The safety device for the mine according to claim 1, wherein: threaded holes are formed in the surface of the supporting plate, the number of the threaded holes is two, and the two threaded holes are symmetrically arranged by taking the center line of the supporting plate as a symmetry axis.
5. The safety device for the mine according to claim 1, wherein: one side fixedly connected with damping spring (19) of bottom plate (18) bottom, damping spring (19)'s quantity is a plurality of, a plurality of damping spring (19) evenly distributed in one side of bottom plate (18), damping spring (19) one end with put the inside one side fixed connection of thing frame (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010957413.4A CN112081621B (en) | 2020-09-13 | 2020-09-13 | Safety device for mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010957413.4A CN112081621B (en) | 2020-09-13 | 2020-09-13 | Safety device for mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112081621A CN112081621A (en) | 2020-12-15 |
| CN112081621B true CN112081621B (en) | 2022-07-22 |
Family
ID=73737655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010957413.4A Active CN112081621B (en) | 2020-09-13 | 2020-09-13 | Safety device for mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112081621B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374686A (en) * | 2018-01-31 | 2018-08-07 | 青岛理工大学 | Mine mining safety device |
| CN208900129U (en) * | 2018-07-11 | 2019-05-24 | 陈益敏 | A kind of mine mine safety device |
| CN210239741U (en) * | 2019-07-26 | 2020-04-03 | 王海龙 | Mine mining safety protection device |
| CN210660190U (en) * | 2019-07-26 | 2020-06-02 | 常州冯卡斯登智能科技有限公司 | Safety protection device for mine |
| CN211116107U (en) * | 2019-09-10 | 2020-07-28 | 郭建平 | Support frame for mine rescue |
| CN211474170U (en) * | 2019-11-18 | 2020-09-11 | 诸暨市云傲机械配件厂 | Protective device for mine construction operation |
-
2020
- 2020-09-13 CN CN202010957413.4A patent/CN112081621B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374686A (en) * | 2018-01-31 | 2018-08-07 | 青岛理工大学 | Mine mining safety device |
| CN208900129U (en) * | 2018-07-11 | 2019-05-24 | 陈益敏 | A kind of mine mine safety device |
| CN210239741U (en) * | 2019-07-26 | 2020-04-03 | 王海龙 | Mine mining safety protection device |
| CN210660190U (en) * | 2019-07-26 | 2020-06-02 | 常州冯卡斯登智能科技有限公司 | Safety protection device for mine |
| CN211116107U (en) * | 2019-09-10 | 2020-07-28 | 郭建平 | Support frame for mine rescue |
| CN211474170U (en) * | 2019-11-18 | 2020-09-11 | 诸暨市云傲机械配件厂 | Protective device for mine construction operation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112081621A (en) | 2020-12-15 |
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