CN211116037U - Tunnel groove forming die trolley - Google Patents
Tunnel groove forming die trolley Download PDFInfo
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- CN211116037U CN211116037U CN201922289628.9U CN201922289628U CN211116037U CN 211116037 U CN211116037 U CN 211116037U CN 201922289628 U CN201922289628 U CN 201922289628U CN 211116037 U CN211116037 U CN 211116037U
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- 230000007246 mechanism Effects 0.000 claims description 26
- 239000000725 suspension Substances 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model provides a tunnel groove forming die trolley, which comprises a body crossing two sides of a tunnel, wherein two sides of the body are respectively and externally suspended and fixed with a groove die and a groove baffle positioned between the groove die and the body, the groove die and the groove baffle can respectively and independently adjust the vertical height, and the groove die and the groove baffle at the same side can integrally adjust the relative distance with the body; the groove die comprises a die body for forming the groove internal structure and square tubes arranged on two sides of the upper surface of the die body along the length direction, and the square tubes can move along the upper surface of the die body to be suspended outside the die body or contract inside the die body. The utility model provides a pair of tunnel slot moulded die platform truck's advantage lies in: through the height of independent adjustment slot mould and slot baffle and the distance at relative tunnel center, be used for the square pipe of shaping apron step through the shrink, prevent that the edges and corners takes place the damage when the drawing of patterns.
Description
Technical Field
The utility model relates to a tunnel construction apparatus technical field especially relates to a tunnel slot moulded die platform truck.
Background
After tunnel pavement inverted arch layer and filling layer construction finish, still need be at the inboard ditch cable duct of construction of tunnel side wall, for the convenience of control tunnel both sides's slot height and position, do not influence the normal operation in the tunnel again, prior art generally uses the mould platform truck and fixes the slot mould in its both sides. However, the tunnel has the condition of turning and uneven height, the positions of the groove molds on the two sides need to be adjusted at the moment, the position of the groove molds on the two sides relative to the center of the tunnel needs to be adjusted only by longitudinally moving the mold trolley along the tunnel in the prior art, the heavy mold trolley is inconvenient to move, the heights of the groove molds on the two sides cannot be adjusted, and the tunnel is inconvenient and impractical to use.
In addition, when the demoulding operation is carried out after the groove pouring is finished, the edges and corners of the groove cover plate placed on the upper surface of the groove are very easy to damage, and the groove cover plate needs to be repaired after being damaged, so that the labor amount is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a groove mould which can prevent groove edges and corners from being damaged and a mould trolley which can conveniently adjust the relative height and distance of the groove moulds at both sides; the problems that the groove is easy to damage and the height and distance of the die are inconvenient to adjust by the die trolley in the prior art are solved.
The utility model discloses a solve above-mentioned technical problem through following technical scheme: a tunnel groove forming die trolley comprises a body crossing two sides of a tunnel, wherein the body is of a frame structure with a travelling channel in the middle, groove dies and groove baffles positioned between the groove dies and the body are respectively and fixedly hung outwards on two sides of the body, the groove dies and the groove baffles can respectively and independently adjust the vertical height, and the groove dies and the groove baffles on the same side can integrally adjust the relative distance with the body;
the groove die comprises a die body for forming the groove internal structure and square tubes arranged on two sides of the upper surface of the die body along the length direction, and the square tubes can move along the upper surface of the die body to be suspended outside the die body or contract inside the die body.
Preferably, two sides of the body are respectively provided with at least two suspension mechanisms matched with the groove mold and the groove baffle along the length direction, each suspension mechanism comprises a foundation pile fixed on the outer side of the body in a suspending manner along the horizontal direction and a sleeve sleeved on the foundation pile, the sleeve can be adjusted in a telescopic manner relative to the foundation pile, and a first telescopic arm matched with the groove baffle and a second telescopic arm matched with the groove mold are respectively arranged below the sleeve; and a third telescopic arm which is telescopic along the length direction of the foundation pile is fixed on the foundation pile, and the other end of the third telescopic arm is fixedly connected with the sleeve.
Preferably, the foundation pile upper surface is provided with the lug, and the top of body side articulates there is the jib that the downward sloping is articulated fixed with the lug, set up the waist type groove that holds the lug on the sleeve, jib and foundation pile are in same vertical plane.
Preferably, the sleeve is further provided with a limiting cylinder in the vertical direction, a limiting rod sleeved in the limiting cylinder is fixed on the groove die, and the limiting cylinder and the limiting rod are freely matched in the vertical direction.
Preferably, the groove baffle is of a substantially rectangular structure when viewed along the length direction of the tunnel, and a jacking mechanism matched with the inner side surface of the groove baffle is arranged on the side edge of the body; the telescopic end of the first telescopic arm is hinged and fixed with the upper surface of the groove baffle plate, and the jacking mechanism comprises two swing rods which are arranged in parallel and are respectively hinged and connected with the side surface of the body and the side surface of the groove baffle plate; still articulated on the slot baffle medial surface have a tight pole in top, the tight pole other end in top is free and can with level ground butt.
Preferably, the length of the swinging rod and the jacking rod is adjustable, and a plurality of limiting parts abutted against the groove baffle are arranged on the upper surface of the groove die along the length direction.
Preferably, the mould body is in a reverse regular trapezoid structure when viewed along the length direction of the groove mould; the bottom surface of the die body is also provided with a convex part protruding downwards.
Preferably, at least two guide blocks are respectively arranged on the opposite side surfaces of the two square pipes along the length direction, guide grooves perpendicular to the length direction of the square pipes are formed in the guide blocks, and limiting plates in the guide grooves are further arranged on the upper surface of the die body; the limiting plate is freely matched with the guide groove along the length direction of the guide groove; the limiting plate is provided with a fixing groove in the vertical direction, and a wedge-shaped block is inserted in the fixing groove.
Preferably, the upper surface of the die body is further provided with a pressing block and a screw rod, wherein two ends of the pressing block are respectively located above the square pipes on two sides, the screw rod is fixed in the vertical direction, and the pressing block is sleeved on the screw rod.
Preferably, the bottom of body both sides still is provided with a plurality of walking wheels respectively and drives at least one walking wheel pivoted actuating mechanism, actuating mechanism includes the motor, passes through the speed reducer that the belt is connected with the motor output, the walking wheel passes through the chain with the output of speed reducer and is connected.
The utility model provides a pair of tunnel slot moulded die platform truck's advantage lies in: the height of the groove die and the groove baffle and the distance between the groove die and the groove baffle and the center of the tunnel are independently adjusted, so that the transverse adjustment of the groove forming position is conveniently realized, the labor intensity is reduced, and the working efficiency is improved; the square tube for forming the cover plate step is contracted, so that the corner is prevented from being damaged during demolding, and the consistency of the product is improved; a jacking mechanism for assisting the positioning of the groove baffle is further provided, so that the forming stability is improved; through setting up the briquetting, can guarantee the fixed effect of the time side pipe of pouring, can release side pipe again when the drawing of patterns, inside convenient the removal to the mould body with side pipe safety, prevent to produce the damage because of removing side pipe to the slot upper surface.
Drawings
Fig. 1 is a schematic view of a tunnel groove forming die trolley according to an embodiment of the present invention;
fig. 2 is a schematic view of a suspension mechanism of a tunnel groove forming die trolley according to an embodiment of the present invention;
fig. 3 is a schematic single-side structural view of a tunnel groove forming die trolley according to an embodiment of the present invention;
fig. 4 is a schematic view of a first telescopic arm and a groove baffle matching structure of a tunnel groove forming die trolley according to an embodiment of the present invention;
fig. 5 is a schematic view of a driving mechanism of a tunnel groove forming die trolley according to an embodiment of the present invention;
fig. 6 is a partial enlarged view of a groove mold of a tunnel groove forming mold trolley according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the embodiment provides a tunnel groove forming die trolley, which includes a body 1 crossing two sides of a tunnel, where the body 1 is a frame structure with a traffic channel (not shown) in the middle, two sides of the body 1 are respectively and outwardly suspended and fixed with a groove die 2 and a groove baffle 3 between the groove die 2 and the body 1, the groove die 2 and the groove baffle 3 can respectively and independently adjust the vertical height, and the groove die 2 and the groove baffle 3 on the same side can integrally adjust the relative distance from the body 1.
Referring to fig. 2 and 3, the mold 2 includes a mold body 23 for forming an inner structure of the groove, and a square pipe 24 disposed on an upper surface of the mold body 23 and protruding to both sides; in order to solve the problem that the crossing position of square pipe 24 and mould body 23 easily takes place to damage during the drawing of patterns, the square pipe 24 that this embodiment provided can be followed mould body 23 upper surface and inwards contracted in mould body 23, during the use earlier with square pipe 24 shrink in the inside of mould body 23 upper surface, then upwards promote mould body 23 and can prevent to damage the edges and corners of ditch cable duct upper surface again.
The height of the groove molds 3 and the groove baffle plates 3 on two sides can be adjusted according to the relative height and gradient of the ditch cable groove formed on two sides after the tunnel is formed, the tunnel turning and height changing conditions are adapted, the relative distances between the groove molds 2 and the groove baffle plates 3 on two sides and the tunnel center can be changed under the condition that the position of the body 1 is not changed by respectively and independently adjusting the relative distances between the groove molds 2 and the groove baffle plates 3 on two sides and the tunnel center, the positions of the turning positions and the like of the tunnel can be basically kept consistent without adjusting the position of the mold trolley body 1, and the operation is facilitated.
With reference to fig. 2, at least two suspension mechanisms 5 cooperating with the groove mold 2 and the groove baffle 3 are respectively disposed on two sides of the body 1 along the length direction of the body, and in this embodiment, two total four suspension mechanisms 5 are respectively uniformly disposed on two sides of the body 1; the suspension mechanism 5 comprises a foundation pile 51 fixed on the outer side of the body 1 in a suspending manner in the horizontal direction and a sleeve 52 sleeved on the foundation pile 51, in this embodiment, one end, matched with the body 1, of the foundation pile 51 is fixed on a vertical beam column of the body 1 through a bolt, the sleeve 52 is in transition fit with the foundation pile 51 in the length direction, a first telescopic arm 53 matched with the groove baffle 3 and a second telescopic arm 54 matched with the groove mold 2 are respectively arranged below the sleeve 52, a third telescopic arm 55 capable of stretching in the length direction is fixed on the foundation pile 51, a power end of the third telescopic arm 55 is fixedly matched with the sleeve 52 in the stretching direction, and in this embodiment, two ends of the third telescopic arm 55 are respectively hinged and fixed with the foundation pile 51 and the sleeve 52. The relative distance between the sleeve 52 and the body 1 is adjusted through the telescopic amount of the third telescopic arm 55, so that the distance between the groove die 2 and the groove baffle 3 suspended below the sleeve 52 relative to the center of the tunnel is integrally adjusted, and the longitudinal adjustment of the groove die 2 and the groove baffle 3 is conveniently realized.
With reference to fig. 2 and 3, in order to improve the stability of the foundation pile 51, the upper surface of the foundation pile 51 is further provided with a lifting lug 56, a suspension rod 57 which is positioned above the foundation pile 51 and is hinged and fixed with the lifting lug 56 is hinged and fixed on the side surface of the body 1, and the stability of the foundation pile 51 is enhanced through the matching of the suspension rod 57 and the lifting lug 56, in the preferred embodiment, the suspension rod 57 and the foundation pile 51 are fixed on the same vertical beam column on the body 1, that is, the suspension rod 57 and the foundation pile 51 are in the same vertical plane, so as to prevent the suspension rod 57 from bearing shearing; the hanger bar 57 may be replaced with another member such as a cable.
With further reference to fig. 2, the sleeve 52 is further provided with a waist-shaped groove 58 along the length direction thereof, the lifting lug 56 is sleeved in the waist-shaped groove 58, and the limitation of the movement range of the sleeve is conveniently realized through the matching of the lifting lug 56 and the waist-shaped groove 58.
Through the adjustment the flexible volume of second flexible arm 54, can change the vertical distance between slot die 2 and the sleeve 52, in order to improve slot die 2 and sleeve 52 along vertical direction relative motion's stability, still be provided with a spacing section of thick bamboo 59 that is fixed in on the sleeve 52 in this embodiment, be fixed with the gag lever post 21 of cover locating in a spacing section of thick bamboo 59 on the slot die 2, thereby spacing section of thick bamboo 59 and gag lever post 21 freely cooperate along vertical direction and play the guide effect to slot die 2's motion.
Referring to fig. 4, the telescopic end of the first telescopic arm 53 is hinged and fixed to the upper surface of the groove baffle 3, in this embodiment, a fixing rod 31 is fixedly disposed on the groove baffle 3, the upper end of the fixing rod 31 is hinged and matched to the telescopic end of the first telescopic arm 53, a fixing tube 32, which is matched to the fixing rod 31, is disposed on the groove baffle 3, the fixing rod 31 protrudes out of the upper surface of the groove baffle 3, a plurality of fixing holes (not shown) are disposed on the surface of the fixing rod 31 in the vertical direction, at least one locking hole (not shown) capable of being matched to the fixing hole is disposed on the surface of the fixing rod 32, and the height of the fixing rod 31 can be changed in the vertical direction relative to the groove baffle 3 by fixedly matching the locking hole.
Referring to fig. 3, when viewed along the length direction of the tunnel, the trench baffle 3 is substantially rectangular, and the side of the body 1 is provided with a tightening mechanism 4 which is matched with the inner side surface 31 of the trench baffle 3, so that the tightening mechanism 4 can keep the trench baffle 3 in a tightened state when pouring is performed.
The jacking mechanism 4 comprises two swinging rods 41 which are arranged in parallel and are respectively hinged with the side surface of the body 1 and the side surface of the groove baffle plate 3, the two swinging rods 41 and the side surfaces of the body 1 and the groove baffle plate 3 enclose to form a parallelogram structure, the groove baffle plate 3 is conveniently fixed to the working position of the groove baffle plate along the vertical direction by a first telescopic rod 53, and the two swinging rods 41 jack against the side surface of the groove baffle plate 3 so as to keep the stability of the groove baffle plate 3 during pouring; when pouring and finishing the drawing of patterns, make slot baffle 3 upward movement through contracting first telescopic link 53, because the restriction of swinging arms 41, slot baffle 3 can only be with the arc to the direction motion drawing of patterns that is close to body 1, ensure that the whole parallel ditch cable duct that leaves of slot baffle 3 prevents to have the deviation to damage the ditch cable duct because of slot baffle 3 overall movement.
Further, in order to improve the stability of jacking, the jacking mechanism 4 further comprises a jacking rod 42 hinged on the inner side surface of the groove baffle 3 facing the body 1, and when pouring is performed, the free end of the hinged end of the jacking rod 42 is abutted with the ground to realize jacking of the groove baffle 3.
Since the position of the sleeve 52 is adjusted, the length of the swing lever 41 can be changed to ensure the use effect of the tightening mechanism 4, and the length of the tightening lever 42 can also be changed in a telescopic manner to facilitate adjustment of the contact position of the tightening lever 42 with the ground. Combine simultaneously fig. 2 and 3, slot die 2 upper surface is provided with a plurality of spacing portions 22 with the side butt of body 1 dorsad of slot baffle 3 along length direction to guarantee the distance between slot die 2 and the slot baffle 3 with the cooperation of tight mechanism 4 in top, guarantee to pour the ditch cable duct surface that obtains even many times.
Referring to fig. 5, the bottom of the two sides of the body 1 is further provided with a plurality of traveling wheels 61 and a driving mechanism 6 for driving at least one traveling wheel 61 to rotate, the driving mechanism 6 includes a motor 62 and a speed reducer 63 connected with the output end of the motor 62 through a belt 64, and the traveling wheels 61 are connected with the output end of the speed reducer through a chain 65. The specific structure of the road wheels 61 is determined according to the selected track, and the road wheels can be separated from the track and directly move in the tunnel by using common rubber wheels.
The motor 62 and the speed reducer 63 are connected by a belt 64, and when the traveling wheel 61 is subjected to resistance and cannot travel, the speed reducer 63 cannot rotate, and at this time, the motor 62 can idle, so that the motor 62 is prevented from being burned out.
With reference to fig. 2 and 3, when the mold body 23 is viewed along the length direction, the inverted regular trapezoid structure is formed, so that the groove mold 3 can be prevented from being continuously contacted with the inner wall of the ditch cable trough when the demolding is completed, and the damage to the wall surface of the ditch cable trough due to the friction force in the demolding process can be avoided. The bottom surface of the mould body 23 is also provided with a bulge 26 for forming a drainage channel, so that the cable in the formed ditch cable channel is positioned at a position higher than sewage, and the influence on the service life of the cable is reduced.
Referring to fig. 6, at least two guide blocks 241 are arranged on the opposite surfaces of the two square pipes 24 along the length direction, a guide groove 242 perpendicular to the length direction of the square pipe 24 is formed in the guide block 241, a position limiting plate 231 located inside the guide groove 242 is arranged on the upper surface of the die body 23, and the position limiting plate 231 and the guide groove 242 are freely matched along the length direction of the guide groove 242, so that the square pipe 24 can be driven to move along the surface of the die body 23 by adjusting the position of the guide block 241. The limiting plate 231 is further provided with a fixing groove (not shown) in the vertical direction, a wedge-shaped plate 232 is fixed in the fixing groove, the wedge-shaped plate 232 is tightly pressed on the guide block 241 through knocking to lock the square pipe 24, and the square pipe 24 is prevented from shaking in the pouring process.
Further, still be provided with briquetting 25 on the mould body 23 to and follow the fixed screw rod 251 of vertical direction, briquetting 25 cover is established on screw rod 251, and the both ends of briquetting 25 are pressed respectively on the square pipe 24 of both sides, when pouring the work, thereby tightly pressing briquetting 25 on screw rod 251 through the nut (not shown) makes square pipe 24 tightly press on the ditch cable duct upper surface after pouring, lets briquetting 25 and square pipe 24 contact cooperation through loosening the nut during the drawing of patterns, makes the friction of square pipe 24 and ditch cable duct upper surface reduce, damages fashioned slot upper surface when preventing to remove square pipe 24. The pressing blocks 25 are provided along both ends and the middle of the upper surface of the groove die 2 in this embodiment, respectively.
The tunnel is generally powered by a hydraulic system, so that the first telescopic arm, the second telescopic arm and the third telescopic arm in the embodiment are all hydraulic oil cylinders.
Claims (10)
1. The utility model provides a tunnel slot moulded die platform truck which characterized in that: the tunnel structure comprises a body crossing two sides of a tunnel, wherein the body is of a frame structure with a traffic channel in the middle, a groove die and a groove baffle positioned between the groove die and the body are respectively fixed to two sides of the body in an outward hanging mode, the groove die and the groove baffle can respectively and independently adjust the vertical height, and the groove die and the groove baffle on the same side can integrally adjust the relative distance with the body;
the groove die comprises a die body for forming the groove internal structure and square tubes arranged on two sides of the upper surface of the die body along the length direction, and the square tubes can move along the upper surface of the die body to be suspended outside the die body or contract inside the die body.
2. The tunnel trench forming die trolley according to claim 1, wherein: two sides of the body are respectively provided with at least two suspension mechanisms matched with the groove die and the groove baffle along the length direction of the body, each suspension mechanism comprises a foundation pile fixed on the outer side of the body in a suspension mode along the horizontal direction and a sleeve sleeved on the foundation pile, the sleeve can be adjusted in a telescopic mode relative to the foundation pile, and a first telescopic arm matched with the groove baffle and a second telescopic arm matched with the groove die are arranged below the sleeve respectively; and a third telescopic arm which is telescopic along the length direction of the foundation pile is fixed on the foundation pile, and the other end of the third telescopic arm is fixedly connected with the sleeve.
3. The tunnel trench forming die trolley according to claim 2, wherein: the foundation pile upper surface is provided with the lug, and the top of body side articulates there is the jib that the downward sloping articulated is fixed with the lug, set up the waist type groove that holds the lug on the sleeve, jib and foundation pile are in same vertical plane.
4. The tunnel trench forming die trolley according to claim 2, wherein: the sleeve is further provided with a limiting cylinder in the vertical direction, a limiting rod sleeved in the limiting cylinder is fixed on the groove die, and the limiting cylinder and the limiting rod are freely matched in the vertical direction.
5. The tunnel trench forming die trolley according to claim 2, wherein: the groove baffle is of a roughly rectangular structure when viewed along the length direction of the tunnel, and a jacking mechanism matched with the inner side surface of the groove baffle is arranged on the side edge of the body; the telescopic end of the first telescopic arm is hinged and fixed with the upper surface of the groove baffle plate, and the jacking mechanism comprises two swing rods which are arranged in parallel and are respectively hinged and connected with the side surface of the body and the side surface of the groove baffle plate; still articulated on the slot baffle medial surface have a tight pole in top, the tight pole other end in top is free and can with level ground butt.
6. The tunnel trench forming die trolley according to claim 5, wherein: the length of swinging arms and the length of tightening rod are adjustable, the upper surface of groove mould is provided with a plurality of spacing portions that butt with the groove baffle along length direction.
7. The tunnel trench forming die trolley according to claim 1, wherein: viewed along the length direction of the groove die, the die body is approximately in an inverted regular trapezoid structure; the bottom surface of the die body is also provided with a convex part protruding downwards.
8. The tunnel trench forming die trolley according to claim 1, wherein: the opposite side surfaces of the two square pipes are respectively provided with at least two guide blocks along the length direction, the guide blocks are provided with guide grooves perpendicular to the length direction of the square pipes, and the upper surface of the die body is also provided with a limiting plate positioned in the guide grooves; the limiting plate is freely matched with the guide groove along the length direction of the guide groove; the limiting plate is provided with a fixing groove in the vertical direction, and a wedge-shaped block is inserted in the fixing groove.
9. The tunnel trench forming die trolley according to claim 8, wherein: the die is characterized in that the upper surface of the die body is also provided with a pressing block and a screw rod, wherein the two ends of the pressing block are respectively positioned above the square pipes on the two sides, the screw rod is fixed along the vertical direction, and the pressing block is sleeved on the screw rod.
10. The tunnel trench forming die trolley according to claim 1, wherein: the bottom of body both sides still is provided with a plurality of walking wheels respectively and drives at least one walking wheel pivoted actuating mechanism, actuating mechanism includes the motor, passes through the speed reducer that the belt is connected with the motor output, the walking wheel passes through the chain with the output of speed reducer and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922289628.9U CN211116037U (en) | 2019-12-18 | 2019-12-18 | Tunnel groove forming die trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922289628.9U CN211116037U (en) | 2019-12-18 | 2019-12-18 | Tunnel groove forming die trolley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211116037U true CN211116037U (en) | 2020-07-28 |
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ID=71695771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922289628.9U Expired - Fee Related CN211116037U (en) | 2019-12-18 | 2019-12-18 | Tunnel groove forming die trolley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211116037U (en) |
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2019
- 2019-12-18 CN CN201922289628.9U patent/CN211116037U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 |