CN110106810B - Positioning device for mounting corrugated plate on guardrail upright post and construction method thereof - Google Patents
Positioning device for mounting corrugated plate on guardrail upright post and construction method thereof Download PDFInfo
- Publication number
- CN110106810B CN110106810B CN201910357744.1A CN201910357744A CN110106810B CN 110106810 B CN110106810 B CN 110106810B CN 201910357744 A CN201910357744 A CN 201910357744A CN 110106810 B CN110106810 B CN 110106810B
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- rod
- corrugated plate
- limiting
- upright post
- collision block
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
- E01F15/0407—Metal rails
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
- E01F15/0484—Installing; Repairing; Adjusting
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Fencing (AREA)
Abstract
The invention relates to a positioning device for installing a corrugated plate on a guardrail upright post and a construction method thereof, wherein the device comprises: the limiting frame is sleeved on the anti-collision block of the guardrail upright post, the limiting frame is attached to the side surface of the guardrail upright post, and the bottom of the limiting frame protrudes and extends to form a bearing surface which is horizontally arranged and used for bearing the corrugated plate; one end of the buckling rod is connected with the buckling rod at the top of the limiting frame in a rotatable mode, the buckling rod is provided with a limiting surface corresponding to the corrugated plate arranged on the bearing surface, and the buckling rod is attached to the limiting surface and arranged on the outer surface of the corrugated plate so as to clamp and fix the anti-collision block and the corrugated plate. The buckling rod fixed on the limiting frame is used for clamping the corrugated plate and the anti-collision block for temporary fixation, the positions of the corrugated plate and the anti-collision block are guaranteed to be unchanged in the subsequent bolt connection process, and the device needs to be disassembled after connection is completed.
Description
Technical Field
The invention relates to the field of building construction, in particular to a positioning device for mounting a corrugated plate on a guardrail upright post and a construction method thereof.
Background
At present, in the installation engineering of the wave-shaped guardrail for road construction, two wave-shaped plates and an anti-collision block need to be connected and fixed through connecting bolts. In the past, a plurality of constructors generally carry two corrugated plates at the same time, attach the two corrugated plates to an anti-collision block, precisely align bolt holes, and use a bolt rod to penetrate through the bolt holes and screw up the two corrugated plates and the anti-collision block.
But the dead weight of wave-shaped plate is great, and artifical transport is wasted time and energy, and there is the error in proofreading the bolt hole, needs many people to construct the work efficiency low in coordination.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a positioning device for mounting a corrugated plate on a guardrail upright post and a construction method thereof, and solves the problems that in the prior art, the corrugated plate has large dead weight, time and labor are wasted in manual carrying, errors exist in bolt hole correction, and the work efficiency is low due to the fact that multiple persons need to perform cooperative construction.
The technical scheme for realizing the purpose is as follows:
the invention provides a positioning device for mounting a corrugated plate on a guardrail upright post, which comprises:
the limiting frame is sleeved on the anti-collision block of the guardrail upright post, the limiting frame is attached to the side surface of the guardrail upright post, and the bottom of the limiting frame protrudes to form a bearing surface which is horizontally arranged and used for bearing the corrugated plate; and
one end of the buckling rod is connected with the buckling rod at the top of the limiting frame in a rotatable mode, the buckling rod is provided with a limiting surface corresponding to the wave-shaped plate arranged on the bearing surface, and the buckling rod is attached to the limiting surface of the wave-shaped plate through rotating so as to clamp and fix the anti-collision block and the wave-shaped plate.
The invention further improves the positioning device for installing the corrugated plate on the guardrail upright post, and the limit frame comprises:
the hanging rod is transversely arranged on the top surface of the anti-collision block and is attached to the guardrail upright post;
the support rods are connected with the hanging rods and clamped on two opposite sides of the anti-collision block, and the support rods are provided with the support surfaces; and
the limiting rods are detachably connected to the pair of support rods and are attached to the bottom surfaces of the anti-collision blocks.
The invention further provides a positioning device for mounting the corrugated plate on the guardrail upright post, which is characterized in that an antiskid bulge for blocking the corrugated plate is formed on the edge of the bearing surface of the support rod.
The positioning device for mounting the corrugated plate on the guardrail upright post is further improved in that the support rod is sleeved on the hanging rod, the hanging rod is screwed with at least one pair of nuts, and the support rod is clamped on two opposite sides of the support rod through the pair of nuts so as to be fixed.
The invention further improves the positioning device for mounting the corrugated plate on the guardrail upright post, wherein the limiting rod is arranged in the pair of support rods in a penetrating way, and one end of the limiting rod is provided with an anti-falling retaining ring.
The invention also provides a construction method of the positioning device for installing the corrugated plate on the guardrail upright post, which comprises the following steps:
providing a limiting frame, sleeving the limiting frame on an anti-collision block of a guardrail upright post, attaching the limiting frame to the side surface of the guardrail upright post, and convexly extending the bottom of the limiting frame to form a bearing surface which is horizontally arranged and used for bearing the corrugated plate;
providing a buckling rod, wherein one end of the buckling rod is rotatably connected to the top of the limiting frame, and a limiting surface corresponding to the wave-shaped plate arranged on the bearing surface is formed on the buckling rod; and
and placing a corrugated plate on the bearing surface and attaching the corrugated plate to the anti-collision block, rotating the buckling rod until the limiting surface is attached to the outer surface of the corrugated plate, and clamping and fixing the anti-collision block and the corrugated plate.
The invention further improves the construction method of the positioning device for installing the corrugated plate on the guardrail upright post, and provides the limit frame, which comprises the following steps:
providing a hanging rod, and transversely arranging the hanging rod on the top surface of the anti-collision block and attaching the hanging rod to the guardrail upright post;
providing at least one pair of support rods, connecting the support rods to the hanging rod and clamping the support rods on two opposite sides of the anti-collision block, wherein the support rods are provided with the bearing surfaces; and
and providing a limiting rod, wherein the limiting rod is detachably connected to the pair of support rods and is attached to the bottom surface of the anti-collision block.
The construction method of the positioning device for mounting the corrugated plate on the guardrail upright post is further improved in that the edge of the bearing surface of the support rod is provided with an anti-skid bulge for blocking the corrugated plate.
The construction method of the positioning device for installing the corrugated plate on the guardrail upright post is further improved in that the step of connecting the pair of support rods to the hanging rod comprises the following steps:
a through hole is formed in the support rod, and the support rod is sleeved on the hanging rod through the through hole; and
and providing at least one pair of nuts, screwing the pair of nuts on the hanging rod and clamping the hanging rod on two opposite sides of the support rod to fix the support rod.
The construction method of the positioning device for mounting the corrugated plate on the guardrail upright post is further improved in that the limiting rod penetrates through the pair of support rods, and one end of the limiting rod is provided with an anti-falling retaining ring.
The positioning device for installing the corrugated plate on the guardrail upright post and the construction method thereof have the beneficial effects that:
according to the invention, the limit frame is sleeved on the anti-collision block, the wave-shaped plate is placed on the bearing surface, the buckle rod fixed on the limit frame is used for clamping the wave-shaped plate and the anti-collision block for temporary fixation, so that bolts can conveniently penetrate through corresponding bolt holes of the wave-shaped plate and the anti-collision block for fixed connection in the follow-up process, the positions of the wave-shaped plate and the anti-collision block are ensured to be unchanged in the bolt connection process, the device needs to be disassembled after connection is completed, and the problems of high dead weight of the wave-shaped plate, time and labor waste in manual carrying, errors in bolt hole correction and low work efficiency due to the need of multi-person cooperative construction in the prior.
Drawings
Fig. 1 is a schematic view of the construction state of a positioning device for installing a corrugated plate on a guardrail upright post.
Fig. 2 is a schematic structural view of a positioning device for mounting a corrugated plate on a guardrail upright post.
Fig. 3 is a front view of fig. 1.
Fig. 4 is a top view of fig. 1.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, a schematic view of the construction state of the positioning device for installing the corrugated plate on the guardrail column is shown. Fig. 2 is a schematic structural diagram of a positioning device for mounting a corrugated plate on a guardrail column. Referring to fig. 1 and 2, the positioning device for mounting a corrugated plate to a guardrail post according to the present invention includes:
the limiting frame 40 is sleeved on the anti-collision block of the guardrail upright post 10, the limiting frame 40 is attached to the side surface of the guardrail upright post 10, and the bottom of the limiting frame 40 protrudes to form a supporting surface which is horizontally arranged and used for supporting the wave-shaped plate 30; and
one end of the buckling rod 50 is rotatably connected with the buckling rod 50 at the top of the limiting frame 40, the buckling rod 50 is provided with a limiting surface corresponding to the wave-shaped plate 30 arranged on the bearing surface, and the buckling rod 50 is rotated to be attached to the limiting surface of the wave-shaped plate 30 so as to clamp and fix the anti-collision block 20 and the wave-shaped plate 30.
As a preferred embodiment of the positioning device for mounting the corrugated plate on the guardrail post, refer to fig. 3 which is a front view of fig. 1. Fig. 4 is a top view of fig. 1. As shown in fig. 1 to 4, the limiting frame 40 includes:
the hanging rod 41 is transversely arranged on the top surface of the anti-collision block 20 and is attached to the guardrail upright post 10;
at least one pair of support rods 42 connected to the hanging rod 41 and clamped on two opposite sides of the anti-collision block 20, wherein the support rods 42 are provided with the bearing surfaces; and
and the limiting rod 43 is detachably connected to the pair of support rods 42 and is attached to the bottom surface of the anti-collision block 20.
As a preferred embodiment of the positioning device for installing the corrugated plate on the guardrail upright post, as shown in fig. 1 to 4, the edge of the bearing surface of the support rod 42 is formed with an anti-skid protrusion 420 for blocking the corrugated plate 30. In this embodiment, the surface of the stud 420 conforms to the curvature of the contoured plate 30.
In this embodiment, the outer surface of the wave-shaped plate 30 is a convex arc surface, and after the wave-shaped plate 30 is placed on the bearing surface of the support rod 42, the surface of the anti-skid protrusions 420 and the arc surface of the wave-shaped plate 30 can be attached to each other, and the bottom of the wave-shaped plate 30 is limited by the anti-skid protrusions 420.
As a preferred embodiment of the positioning device for mounting the corrugated plate on the guardrail post according to the present invention, the support rod 42 is sleeved on the hanging rod 41, at least a pair of nuts 44 are screwed on the hanging rod 41, and the support rod 42 is fixed by the pair of nuts 44 being clamped on opposite sides of the support rod 42.
Specifically, after the support rods 42 are arranged on the two opposite sides of the anti-collision block 20 and the positions of the support rods 42 are adjusted, a pair of nuts 44 are screwed on the hanging rods 41 and fixed on the two opposite sides of the support rods 42 so as to fix the positions of the support rods 42, and the support rods 42 are prevented from moving, so that the positions of the limit frames 40 are ensured to be unchanged.
Further, a screw thread is provided at an end portion of the hanging rod 41, a nut 44 is screwed to the end portion of the hanging rod 41 and is also movable by the screw thread, and the position of the carrier rod 42 is adjusted by adjusting the movable nut 44.
Further, as shown in fig. 4, a through hole is formed at one end of the fastening rod 50, the fastening rod 50 is sleeved on the hanging rod 41 through the through hole, and the fastening rod 50 can rotate around the hanging rod 41.
In this embodiment, the fastening rod 50 is sleeved on the hanging rod 41 and located between the pair of support rods 42, the fastening rod 50 is attached to one support rod 42, the hanging rod 41 is screwed by using a pair of nuts 44, and the fastening rod 50 and the support rod 42 are clamped and fixed by using a pair of nuts 44, so as to limit the positions of the fastening rod 50 and the support rod 42.
In this embodiment, the buckle rod 50 is a U-shaped rod, and the U-shaped rod is used to clamp and fix the anti-collision block 20 and the corrugated plate 30, which are attached to each other, so as to prevent the corrugated plate 30 from moving, thereby facilitating the subsequent fixing of the corrugated plate 30 to the anti-collision block 20.
As a preferred embodiment of the positioning device for installing the corrugated plate on the guardrail column, the limiting rod 43 is inserted into the pair of support rods 42, and a stop ring 430 for preventing the falling off is formed at one end of the limiting rod. The diameter of the stop ring 430 is larger than the hole of the support rod 42 through which the limiting rod 43 passes. The corrugated plate 30 and the anti-collision block 20 are attached and connected through the device for temporary fixation, and then bolts are adopted to penetrate through corresponding bolt holes of the corrugated plate 30 and the anti-collision block 20 for fixed connection. The device needs to be removed after connection. Specifically, the limiting rod 43 is extracted from the supporting rod 42, and then the limiting frame 40 is separated from the anti-collision block 20 for disassembly, so that the turnover use is convenient.
In the present embodiment, the support rod 42 is an L-shaped rod. The height of the support rod 42 is about 1/2 the height of the wave plate or the height of the bump stop, and the length of the horizontal edge of the support rod 42 is about the wave plate width plus the bump stop width. The height of the buckle lever 50 is 1/2 the height of the wave plate, and the length of the horizontal edge of the buckle lever 50 is about the sum of the width of the wave plate and the width of the anti-blocking block. The length of the hanging bar 41 is approximately longer than the length of the short side of the crash block 20.
The invention also provides a construction method of the positioning device for installing the corrugated plate on the guardrail upright post, which comprises the following steps:
providing a limiting frame 40, sleeving the limiting frame 40 on the anti-collision block 20 of the guardrail upright post 10, attaching the limiting frame 40 to the side surface of the guardrail upright post 10, and convexly extending the bottom of the limiting frame 40 to form a supporting surface which is horizontally arranged and used for supporting the corrugated plate 30;
providing a buckle rod 50, connecting one end of the buckle rod 50 to the top of the limiting frame 40 in a rotatable manner, wherein the buckle rod 50 is provided with a limiting surface corresponding to the wave-shaped plate 30 arranged on the bearing surface; and
and placing the corrugated plate 30 on the bearing surface and attaching the corrugated plate to the anti-collision block 20, rotating the buckle rod 50 until the limiting surface is attached to the outer surface of the corrugated plate 30, and clamping and fixing the anti-collision block 20 and the corrugated plate 30.
As a preferred embodiment of the method for constructing the positioning device for installing the corrugated plate on the guardrail upright post according to the present invention, there is provided the limit frame 40, including:
providing a hanging rod 41, and arranging the hanging rod 41 transversely on the top surface of the anti-collision block 20 and attaching to the guardrail upright post 10;
providing at least one pair of support rods 42, connecting the pair of support rods 42 to the hanging rod 41 and clamping the support rods 42 on two opposite sides of the anti-collision block 20, wherein the support rods 42 are provided with the bearing surfaces; and
a limiting rod 43 is provided, and the limiting rod 43 is detachably connected to the pair of support rods 42 and attached to the bottom surface of the anti-collision block 20.
In a preferred embodiment of the method for constructing the positioning device for installing the corrugated plate on the guardrail upright post, the edge of the bearing surface of the support rod 42 is formed with an anti-skid protrusion 420 for blocking the corrugated plate 30.
As a preferred embodiment of the method for constructing the positioning device for mounting the corrugated plate on the guardrail post according to the present invention, the step of connecting the pair of support rods 42 to the hanging rod 41 includes:
a through hole is formed in the support rod 42, and the support rod 42 is sleeved on the hanging rod 41 through the through hole; and
at least one pair of nuts 44 is provided, and the pair of nuts 44 are screwed on the hanging rod 41 and clamped on two opposite sides of the support rod 42 to fix the support rod 42.
In a preferred embodiment of the method for constructing the positioning device for installing the corrugated plate on the guardrail post according to the present invention, the limiting rod 43 is inserted into the pair of support rods 42, and a stop ring 430 for preventing the corrugated plate from falling off is formed at one end of the limiting rod.
The positioning device for installing the corrugated plate on the guardrail upright post and the construction method thereof have the beneficial effects that:
according to the invention, the limit frame is sleeved on the anti-collision block, the wave-shaped plate is placed on the bearing surface, the buckle rod fixed on the limit frame is used for clamping the wave-shaped plate and the anti-collision block for temporary fixation, so that bolts can conveniently penetrate through corresponding bolt holes of the wave-shaped plate and the anti-collision block for fixed connection in the follow-up process, the positions of the wave-shaped plate and the anti-collision block are ensured to be unchanged in the bolt connection process, the device needs to be disassembled after connection is completed, and the problems of high dead weight of the wave-shaped plate, time and labor waste in manual carrying, errors in bolt hole correction and low work efficiency due to the need of multi-person cooperative construction in the prior.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (8)
1. The utility model provides a positioner that wave plate installed in guardrail stand usefulness which characterized in that includes:
the limiting frame is sleeved on the anti-collision block of the guardrail upright post, the limiting frame is attached to the side surface of the guardrail upright post, and the bottom of the limiting frame protrudes to form a bearing surface which is horizontally arranged and used for bearing the corrugated plate; and
one end of the buckling rod is connected to the top of the limiting frame in a rotatable mode, a limiting surface corresponding to the wave-shaped plate arranged on the bearing surface is formed on the buckling rod, and the buckling rod is rotated until the limiting surface is attached to the outer surface of the wave-shaped plate so as to clamp and fix the anti-collision block and the wave-shaped plate;
the spacing frame includes:
the hanging rod is transversely arranged on the top surface of the anti-collision block and is attached to the guardrail upright post;
the support rods are connected with the hanging rods and clamped on two opposite sides of the anti-collision block, and the support rods are provided with the support surfaces; and
the limiting rods are detachably connected to the pair of support rods and are attached to the bottom surfaces of the anti-collision blocks.
2. The positioning device for installing the corrugated plate on the guardrail upright post as claimed in claim 1, wherein the edge of the bearing surface of the support rod is formed with an anti-skid protrusion for blocking the corrugated plate.
3. The positioning device for mounting a corrugated plate on a guardrail post according to claim 1, wherein the support rod is sleeved on the hanging rod, the hanging rod is screwed with at least one pair of nuts, and the support rod is clamped on two opposite sides of the support rod through the pair of nuts so as to be fixed.
4. The positioning device for installing the corrugated plate on the guardrail post as claimed in claim 1, wherein the limiting rod is inserted into the pair of support rods and has an anti-falling stop ring formed at one end.
5. A construction method of a positioning device for installing a corrugated plate on a guardrail upright post is characterized by comprising the following steps:
providing a limiting frame, sleeving the limiting frame on an anti-collision block of a guardrail upright post, attaching the limiting frame to the side surface of the guardrail upright post, and convexly extending the bottom of the limiting frame to form a bearing surface which is horizontally arranged and used for bearing the corrugated plate;
providing a buckling rod, wherein one end of the buckling rod is rotatably connected to the top of the limiting frame, and a limiting surface corresponding to the wave-shaped plate arranged on the bearing surface is formed on the buckling rod; and
placing a corrugated plate on the bearing surface and attaching the corrugated plate to the anti-collision block, and rotating the buckling rod until the limiting surface is attached to the outer surface of the corrugated plate so as to clamp and fix the anti-collision block and the corrugated plate;
providing the limit frame, including:
providing a hanging rod, and transversely arranging the hanging rod on the top surface of the anti-collision block and attaching the hanging rod to the guardrail upright post;
providing at least one pair of support rods, connecting the support rods to the hanging rod and clamping the support rods on two opposite sides of the anti-collision block, wherein the support rods are provided with the bearing surfaces; and
and providing a limiting rod, wherein the limiting rod is detachably connected to the pair of support rods and is attached to the bottom surface of the anti-collision block.
6. The method for constructing a positioning device for installing a corrugated plate on a guardrail upright post as claimed in claim 5, wherein the edge of the bearing surface of the support rod is provided with an anti-skid protrusion for blocking the corrugated plate.
7. The method of claim 5, wherein the step of attaching a pair of the support rods to the hanging rods comprises:
a through hole is formed in the support rod, and the support rod is sleeved on the hanging rod through the through hole; and
and providing at least one pair of nuts, screwing the pair of nuts on the hanging rod and clamping the hanging rod on two opposite sides of the support rod to fix the support rod.
8. A method of constructing a positioning device for installing a corrugated plate to a fence post according to claim 5,
the limiting rod penetrates through the pair of support rods, and one end of the limiting rod is provided with an anti-falling stop ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910357744.1A CN110106810B (en) | 2019-04-30 | 2019-04-30 | Positioning device for mounting corrugated plate on guardrail upright post and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910357744.1A CN110106810B (en) | 2019-04-30 | 2019-04-30 | Positioning device for mounting corrugated plate on guardrail upright post and construction method thereof |
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| Publication Number | Publication Date |
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| CN110106810A CN110106810A (en) | 2019-08-09 |
| CN110106810B true CN110106810B (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910357744.1A Active CN110106810B (en) | 2019-04-30 | 2019-04-30 | Positioning device for mounting corrugated plate on guardrail upright post and construction method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110541378B (en) * | 2019-09-11 | 2021-08-24 | 浙江恩利交通科技有限公司 | Highway waveform guardrail mounting equipment |
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| CN205934797U (en) * | 2016-04-05 | 2017-02-08 | 天津市鑫大远金属制品有限公司 | Anti -collision guard rail |
| CN206282032U (en) * | 2016-04-21 | 2017-06-27 | 赵山山 | A kind of locating fastener device |
| KR20190037802A (en) * | 2017-09-29 | 2019-04-08 | 정도산업 주식회사 | Guardrail installation automation system and method for installation the same |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150135870A (en) * | 2014-05-26 | 2015-12-04 | 주식회사 비앤엘개발 | Method for constructing for guardrail and two stage piling chisel |
| CN205934797U (en) * | 2016-04-05 | 2017-02-08 | 天津市鑫大远金属制品有限公司 | Anti -collision guard rail |
| CN206282032U (en) * | 2016-04-21 | 2017-06-27 | 赵山山 | A kind of locating fastener device |
| CN205663234U (en) * | 2016-06-03 | 2016-10-26 | 赵捆柱 | Swift assembled building construction protection fence |
| CN205777458U (en) * | 2016-07-01 | 2016-12-07 | 温州市欧美金属制品有限公司 | A kind of fastener fixing for steel pipe |
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| KR20190037802A (en) * | 2017-09-29 | 2019-04-08 | 정도산업 주식회사 | Guardrail installation automation system and method for installation the same |
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| CN110106810A (en) | 2019-08-09 |
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