CN108797353B - Protector is used in bridge construction - Google Patents
Protector is used in bridge construction Download PDFInfo
- Publication number
- CN108797353B CN108797353B CN201810614209.5A CN201810614209A CN108797353B CN 108797353 B CN108797353 B CN 108797353B CN 201810614209 A CN201810614209 A CN 201810614209A CN 108797353 B CN108797353 B CN 108797353B
- Authority
- CN
- China
- Prior art keywords
- rod
- fixedly connected
- fixing rod
- hook
- fixing
- 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.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a protection device, in particular to a protection device for bridge construction. The invention aims to provide a protective device for bridge construction, which is convenient to transport and install. A protective device for bridge construction comprises a first fixed rod, a second fixed rod, a fixed mechanism, a first hook, a second hook and the like; and the output end is matched with the second fixed rod; a plurality of first hooks with equal intervals are fixedly connected to one side parts of the first fixed rod and the second fixed rod, and a plurality of second hooks which are in one-to-one correspondence with the first hooks are fixedly connected to the other side parts of the first fixed rod and the second fixed rod; the first hanging rings at equal intervals are fixedly connected to one side part of the protective net body. The invention achieves the effects of convenient transportation and installation.
Description
Technical Field
The invention relates to a protection device, in particular to a protection device for bridge construction.
Background
The bridge generally refers to a structure erected on rivers, lakes and seas to enable vehicles, pedestrians and the like to pass smoothly, and in a bridge construction site, in order to protect safety of construction personnel and facilitate erection of a working platform, scaffolds are usually erected on the periphery of a built bridge and related auxiliary sites, and after the scaffolds are erected, a construction green net is horizontally hung on the periphery of the built bridge for safety protection.
The invention discloses a protective net for bridge construction, which aims at solving the problems of low protective effect and inconvenience in installation in the prior art and discloses the protective net for bridge construction, and the protective net comprises a main protective rod, an auxiliary rod a, a protective net a, a secondary protective rod, an auxiliary rod b, a protective net b, a warning board, a fixing device a and a fixing device b, wherein the fixing device a is arranged on the upper side and the lower side of the front end of the main protective rod, the warning board is arranged in the middle of the front end of the main protective rod, a connecting base is arranged at the lower end of the main protective rod, the protective net a is arranged in the inner cavity of the main protective rod, the main protective rod is connected with the auxiliary rod a through the protective net a, the fixing device b is arranged on the upper side and the lower side of the auxiliary rod a, the secondary protective rod is arranged at the rear end of the main protective rod, the auxiliary rod b is arranged at the rear end of the. The invention can be quickly erected at the periphery of a scaffold at a construction site for protection through the main protection rod, the auxiliary rod a and the front end fixing device thereof, is convenient to install and disassemble, is practical and suitable for wide popularization and use, but has the defect of inconvenient transportation due to overlarge protective net device for bridge construction.
A third stage: in summary, a protection device for bridge construction, which is convenient to transport and install, needs to be developed at present to overcome the disadvantage of inconvenient transportation in the prior art.
Disclosure of Invention
In order to overcome the defect of inconvenient transportation in the prior art, the invention aims to provide the protective device for bridge construction, which is convenient to transport and install.
The invention is achieved by the following specific technical means:
a protective device for bridge construction comprises a first fixed rod, a second fixed rod, a fixed mechanism, a first hook, a second hook, a protective net body, a first hanging ring and a second hanging ring; the second fixed rod is placed at the top of the first fixed rod; the fixing mechanism is fixedly connected to the side part of the first fixing rod, and the output end of the fixing mechanism is matched with the second fixing rod; a plurality of first hooks with equal intervals are fixedly connected to one side parts of the first fixed rod and the second fixed rod, and a plurality of second hooks which are in one-to-one correspondence with the first hooks are fixedly connected to the other side parts of the first fixed rod and the second fixed rod; a plurality of first hanging rings with equal intervals are fixedly connected to one side part of the protective net body, and a plurality of second hanging rings which are in one-to-one correspondence with the first hanging rings are fixedly connected to the other side part of the protective net body; one end of the protective net body is hung on the first hook through a first hanging ring, and the other end of the protective net body is hung on the second hook through a second hanging ring;
the fixing mechanism comprises a connecting rod, a first L-shaped fixing rod, a first butterfly bolt, a second L-shaped fixing rod and a second butterfly bolt; the top of the first fixed rod is provided with a first groove; the connecting rod is fixedly connected to the bottom of the second fixing rod and is positioned in the first groove; the first L-shaped fixed rod is fixedly connected to one side part of the first fixed rod, and the second L-shaped fixed rod is fixedly connected to the other side part of the first fixed rod; the first L-shaped fixing rod is provided with a first threaded hole, and the second L-shaped fixing rod is provided with a second threaded hole; one side part of the second fixing rod is provided with a first thread groove, and the other side part of the second fixing rod is provided with a second thread groove; the first butterfly bolt penetrates through the first threaded hole and is in threaded connection with the first threaded groove, and the second butterfly bolt penetrates through the first threaded hole and is in threaded connection with the second threaded groove;
the device also comprises a first elastic piece; one side parts of the first fixing rod and the second fixing rod are provided with a plurality of second grooves; one end of the second hook is positioned in the second groove and is in sliding connection with the second groove; one end of the first elastic piece is fixedly connected with one side part of the second hook, and the other end of the first elastic piece is fixedly connected with one side wall in the second groove;
the device also comprises a concave block and an inserted link; the concave block is fixedly connected to one side part of the second fixed rod, a through hole is formed in the second hook, and one end of the inserted rod penetrates through the through hole to be matched with the inserted pile at the top of the concave block;
also comprises a handle; the handle is fixedly connected to the top of the inserted link;
the device also comprises a mounting plate; the mounting panel rigid coupling is in first dead lever bottom, and it has a plurality of mounting holes to open on the mounting panel.
Furthermore, the protective device for bridge construction also comprises a hollow rod and a second elastic piece; the hollow rod is fixedly connected to the top of the mounting plate; the first fixed rod is positioned in the hollow rod and is in sliding connection with the hollow rod; one end of the second elastic piece is fixedly connected to the bottom of the first fixed rod, and the other end of the second elastic piece is fixedly connected to the inner bottom of the hollow rod.
Furthermore, the protective device for bridge construction also comprises a third hook; the third hook is fixedly connected with the front part of the second fixed rod.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the fixing mechanism is used for fixing the second fixing rod, the first fixing rod and the second fixing rod form the supporting rod, the first hanging ring is matched with the first hook, and the second hanging ring is matched with the second hook, so that the protective net body can be conveniently hung, and the effects of convenience in transportation and installation are achieved.
Drawings
Fig. 1 is a first front view structure diagram of the present invention.
Fig. 2 is a front view of the fixing mechanism of the present invention.
Fig. 3 is a second front view structure diagram of the present invention.
FIG. 4 is an enlarged view of A in FIG. 3 according to the present invention.
FIG. 5 is an enlarged view of B in FIG. 3 according to the present invention.
Fig. 6 is a third schematic view of the present invention.
Fig. 7 is a schematic diagram of a first enlarged structure of C in fig. 6 according to the present invention.
Fig. 8 is a second enlarged structural diagram of C in fig. 6 according to the present invention.
Fig. 9 is a schematic diagram of a fourth front view structure according to the present invention.
Fig. 10 is a schematic view of a fifth front view structure according to the present invention.
Fig. 11 is a left side view structural diagram of the present invention.
The labels in the figures are: 1-a first fixing rod, 2-a second fixing rod, 3-a fixing mechanism, 31-a first groove, 32-a connecting rod, 33-a first L-shaped fixing rod, 34-a first threaded hole, 35-a first threaded groove, 36-a first butterfly bolt, 37-a second L-shaped fixing rod, 38-a second threaded hole, 39-a second threaded groove, 310-a second butterfly bolt, 4-a first hook, 5-a second hook, 6-a protective net body, 7-a first hanging ring, 8-a second hanging ring, 9-a second groove, 10-a first elastic member, 11-a concave block, 12-a through hole, 13-an inserting rod, 14-a handle, 15-a mounting plate, 16-a mounting hole, 17-a hollow rod, 18-a second elastic member, 19-third hook.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
examples
A protective device for bridge construction is shown in figures 1-11 and comprises a first fixed rod 1, a second fixed rod 2, a fixed mechanism 3, a first hook 4, a second hook 5, a protective net body 6, a first hanging ring 7 and a second hanging ring 8; the second fixed rod 2 is placed at the top of the first fixed rod 1; the fixing mechanism 3 is fixedly connected to the side part of the first fixing rod 1, and the output end of the fixing mechanism is matched with the second fixing rod 2; a plurality of first hooks 4 with equal intervals are fixedly connected to one side parts of the first fixed rod 1 and the second fixed rod 2, and a plurality of second hooks 5 which are in one-to-one correspondence with the first hooks 4 are fixedly connected to the other side parts of the first fixed rod 1 and the second fixed rod 2; a plurality of first hanging rings 7 with equal intervals are fixedly connected to one side part of the protective net body 6, and a plurality of second hanging rings 8 which are in one-to-one correspondence with the first hanging rings 7 are fixedly connected to the other side part of the protective net body 6; one end of the protective net body 6 is hung on the first hook 4 through the first hanging ring 7, and the other end is hung on the second hook 5 through the second hanging ring 8.
When the protection device needs to be set up, the plurality of first fixing rods 1, the plurality of second fixing rods 2 and the protection net body 6 are transported to a place where the protection device needs to be set up, and then the first fixing rods 1, the plurality of second fixing rods 2 and the protection net body 6 are installed and spliced together, so that the protection device can be set up.
First place second dead lever 2 in 1 top of first dead lever, locking fixed establishment 3, so that fixed second dead lever 2, bury underground first dead lever 1 bottom again, according to the length of protection network body 6, and then bury first dead lever 1 of second underground, effect through fixed establishment 3, make first dead lever 1, second dead lever 2 forms the bracing piece, hang first link 7 on arranging first couple 4 of first spinal branch vaulting pole in, second link 8 is hung on arranging second couple 5 of second spinal branch vaulting pole in, alright completion protector's establishment, so, reached the effect of being convenient for transport, being convenient for install.
The fixing mechanism 3 comprises a connecting rod 32, a first L-shaped fixing rod 33, a first butterfly bolt 36, a second L-shaped fixing rod 37 and a second butterfly bolt 310; the top of the first fixed rod 1 is provided with a first groove 31; the connecting rod 32 is fixedly connected to the bottom of the second fixing rod 2 and is positioned in the first groove 31; the first L-shaped fixing rod 33 is fixedly connected with one side part of the first fixing rod 1, and the second L-shaped fixing rod 37 is fixedly connected with the other side part of the first fixing rod 1; the first L-shaped fixing rod 33 is provided with a first threaded hole 34, and the second L-shaped fixing rod 37 is provided with a second threaded hole 38; one side part of the second fixing rod 2 is provided with a first thread groove 35, and the other side part is provided with a second thread groove 39; the first butterfly bolt 36 penetrates through the first threaded hole 34 and is in threaded connection with the first threaded groove 35, and the second butterfly bolt 310 penetrates through the first threaded hole 34 and is in threaded connection with the second threaded groove 39; when the second fixing rod 2 needs to be fixed, the second fixing rod 2 is placed on the top of the first fixing rod 1, the connecting rod 32 is located in the first groove 31, the first butterfly bolt 36 is rotated to be rotated into the first thread groove 35, the second butterfly bolt 310 is rotated to be rotated into the second thread groove 39, and therefore the second fixing rod 2 is fixed.
The protection device for bridge construction further comprises a first elastic piece 10; one side parts of the first fixing rod 1 and the second fixing rod 2 are provided with a plurality of second grooves 9; one end of the second hook 5 is positioned in the second groove 9 and is connected with the second groove 9 in a sliding way; one end of the first elastic piece 10 is fixedly connected with one side part of the second hook 5, and the other end is fixedly connected with one side wall in the second groove 9; through second couple 5 and the cooperation of second recess 9, the second couple 5 of being convenient for moves left for second link 8 hangs more easily and arranges in on second couple 5, and the hanging of protection network body 6 of being convenient for is put, because first elastic component 10 is in tensile state, through the effect of first elastic component 10 elasticity, makes second couple 5 remove right, thereby taut protection network body 6.
The protection device for bridge construction further comprises a concave block 11 and an inserted rod 13; the concave block 11 is fixedly connected with one side part of the second fixed rod 2, a through hole 12 is formed in the second hook 5, and one end of the inserted link 13 penetrates through the through hole 12 to be matched with the inserted pile at the top of the concave block 11; through inserted bar 13 and the cooperation of 11 tops of concave block, the fixed inserted bar 13 of being convenient for, through-hole 12 and the cooperation of inserted bar 13, the fixed second couple 5 of being convenient for prevents that protection network body 6 from receiving the offend of article, and protection network body 6 drives second couple 5 through second link 8 and moves left for second link 8 breaks away from second couple 5, causes dropping of protection network body 6, takes place danger.
The protection device for bridge construction further comprises a handle 14; the handle 14 is fixedly connected to the top of the inserted link 13; the insertion rod 13 is easily pulled out and inserted by the handle 14.
The protective device for bridge construction further comprises an installation plate 15; the mounting plate 15 is fixedly connected to the bottom of the first fixing rod 1, and a plurality of mounting holes 16 are formed in the mounting plate 15; the mounting plate 15 is conveniently fixed by the mounting hole 16, thereby facilitating the fixing of the first fixing lever 1.
The protection device for bridge construction further comprises a hollow rod 17 and a second elastic piece 18; the hollow rod 17 is fixedly connected to the top of the mounting plate 15; the first fixing rod 1 is positioned in the hollow rod 17 and is in sliding connection with the hollow rod 17; one end of the second elastic element 18 is fixedly connected with the bottom of the first fixed rod 1, and the other end is fixedly connected with the inner bottom of the hollow rod 17; through hollow rod 17 and the cooperation of second elastic component 18, accomplish the cushioning effect to first dead lever 1, prevent because protection network body 6 receives the offend of article to cause vibrations to first dead lever 1 and second dead lever 2, make mounting panel 15 produce and rock, cause mounting panel 15 to install insecure, so, can improve mounting panel 15's stability.
Wherein, the protective device for bridge construction also comprises a third hook 19; the third hook 19 is fixedly connected with the front part of the second fixed rod 2; through third couple 19, be convenient for hang and put the warning sign, improve the warning effect.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.
Claims (3)
1. A protection device for bridge construction is characterized by comprising a first fixed rod (1), a second fixed rod (2), a fixing mechanism (3), a first hook (4), a second hook (5), a protective net body (6), a first hanging ring (7) and a second hanging ring (8); the second fixing rod (2) is placed at the top of the first fixing rod (1); the fixing mechanism (3) is fixedly connected to the side part of the first fixing rod (1), and the output end of the fixing mechanism is matched with the second fixing rod (2); a plurality of first hooks (4) with equal intervals are fixedly connected to one side parts of the first fixed rod (1) and the second fixed rod (2), and a plurality of second hooks (5) which are in one-to-one correspondence with the first hooks (4) are fixedly connected to the other side parts of the first fixed rod (1) and the second fixed rod (2); a plurality of first hanging rings (7) with equal intervals are fixedly connected to one side part of the protective net body (6), and a plurality of second hanging rings (8) which are in one-to-one correspondence with the first hanging rings (7) are fixedly connected to the other side part of the protective net body (6); one end of the protective net body (6) is hung on the first hook (4) through a first hanging ring (7), and the other end of the protective net body is hung on the second hook (5) through a second hanging ring (8);
the fixing mechanism (3) comprises a connecting rod (32), a first L-shaped fixing rod (33), a first butterfly bolt (36), a second L-shaped fixing rod (37) and a second butterfly bolt (310); the top of the first fixed rod (1) is provided with a first groove (31); the connecting rod (32) is fixedly connected to the bottom of the second fixing rod (2) and is positioned in the first groove (31); the first L-shaped fixing rod (33) is fixedly connected to one side part of the first fixing rod (1), and the second L-shaped fixing rod (37) is fixedly connected to the other side part of the first fixing rod (1); a first threaded hole (34) is formed in the first L-shaped fixing rod (33), and a second threaded hole (38) is formed in the second L-shaped fixing rod (37); one side part of the second fixing rod (2) is provided with a first thread groove (35), and the other side part is provided with a second thread groove (39); the first butterfly bolt (36) penetrates through the first threaded hole (34) and is in threaded connection with the first threaded groove (35), and the second butterfly bolt (310) penetrates through the first threaded hole (34) and is in threaded connection with the second threaded groove (39);
also comprises a first elastic part (10); one side parts of the first fixing rod (1) and the second fixing rod (2) are provided with a plurality of second grooves (9); one end of the second hook (5) is positioned in the second groove (9) and is connected with the second groove (9) in a sliding way; one end of the first elastic piece (10) is fixedly connected with one side part of the second hook (5), and the other end is fixedly connected with one side wall in the second groove (9);
the device also comprises a concave block (11) and an inserted rod (13); the concave block (11) is fixedly connected to one side part of the second fixing rod (2), a through hole (12) is formed in the second hook (5), and one end of the inserted rod (13) penetrates through the through hole (12) to be matched with an inserted pile at the top of the concave block (11);
also comprises a handle (14); the handle (14) is fixedly connected to the top of the inserted rod (13);
also comprises a mounting plate (15); the mounting plate (15) is fixedly connected to the bottom of the first fixing rod (1), and a plurality of mounting holes (16) are formed in the mounting plate (15).
2. The bridge construction guard according to claim 1, further comprising a hollow rod (17) and a second elastic member (18); the hollow rod (17) is fixedly connected to the top of the mounting plate (15); the first fixing rod (1) is positioned in the hollow rod (17) and is in sliding connection with the hollow rod (17); one end of the second elastic element (18) is fixedly connected with the bottom of the first fixed rod (1), and the other end is fixedly connected with the inner bottom of the hollow rod (17).
3. The protection device for bridge construction according to claim 2, further comprising a third hook (19); the third hook (19) is fixedly connected with the front part of the second fixed rod (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614209.5A CN108797353B (en) | 2018-06-14 | 2018-06-14 | Protector is used in bridge construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614209.5A CN108797353B (en) | 2018-06-14 | 2018-06-14 | Protector is used in bridge construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108797353A CN108797353A (en) | 2018-11-13 |
| CN108797353B true CN108797353B (en) | 2020-10-16 |
Family
ID=64086948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810614209.5A Active CN108797353B (en) | 2018-06-14 | 2018-06-14 | Protector is used in bridge construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108797353B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11807998B2 (en) * | 2021-02-03 | 2023-11-07 | Dalian University Of Technology | Dangling net cloth device for suppressing flutter of sea-crossing bridge |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894784A (en) * | 2020-07-27 | 2020-11-06 | 安徽青云峡旅游发展有限公司 | Safe and reliable's big waterwheel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100995855B1 (en) * | 2010-07-07 | 2010-11-22 | 동방엔지니어링 주식회사 | Base support having moving rollers for manufacturing upper plate of a bridge |
| CN206655109U (en) * | 2017-03-22 | 2017-11-21 | 宁波大学 | A kind of bridge construction anti-drop device |
| CN206737567U (en) * | 2017-05-04 | 2017-12-12 | 西安市政一路桥建设有限公司 | A kind of road and bridge construction protection network |
-
2018
- 2018-06-14 CN CN201810614209.5A patent/CN108797353B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100995855B1 (en) * | 2010-07-07 | 2010-11-22 | 동방엔지니어링 주식회사 | Base support having moving rollers for manufacturing upper plate of a bridge |
| CN206655109U (en) * | 2017-03-22 | 2017-11-21 | 宁波大学 | A kind of bridge construction anti-drop device |
| CN206737567U (en) * | 2017-05-04 | 2017-12-12 | 西安市政一路桥建设有限公司 | A kind of road and bridge construction protection network |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11807998B2 (en) * | 2021-02-03 | 2023-11-07 | Dalian University Of Technology | Dangling net cloth device for suppressing flutter of sea-crossing bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108797353A (en) | 2018-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108797353B (en) | Protector is used in bridge construction | |
| GB2437285A (en) | Temporary fencing with stabilising struts | |
| CN206128597U (en) | Assembly type structure work platform | |
| KR101707170B1 (en) | Structure for connecting support | |
| KR101599672B1 (en) | Coupling device for supporting beam of earth retaining wall | |
| CN207363291U (en) | A kind of dedicated guard rail of precast stair | |
| CN208454342U (en) | A kind of safety of tower crane platform and standard knot install conjoined device | |
| CN106760585A (en) | China Democratic National Construction Association house floor levels hole provisional protection column and installation method | |
| CN104372923B (en) | Scaffolding | |
| CN208650505U (en) | The integrated template type attachment device of lifting platform | |
| CN204038917U (en) | Detachable external hanging type operating platform | |
| CN220504718U (en) | Building engineering protector | |
| CN207749848U (en) | A kind of fall arrest construction holder | |
| CN220849101U (en) | Safety guard rail for engineering management | |
| CN206655109U (en) | A kind of bridge construction anti-drop device | |
| CN213626962U (en) | Modular foundation ditch protector for road construction | |
| CN220828116U (en) | Recoverable folding safety net device | |
| CN210767918U (en) | Hook seat for protection net of cantilever plate | |
| CN104499724A (en) | Edge protection fence | |
| CN219654346U (en) | Guardrail device applied to subway civil engineering foundation pit support | |
| CN216556251U (en) | Security protection supervisory equipment fast-assembling structure | |
| CN205976435U (en) | Perforation formula steel sheet safety device | |
| CN211449863U (en) | Pay-off rack for pipeline repair | |
| CN221194227U (en) | Sustainable use combination dismouting formula L type guardrail | |
| CN218715739U (en) | But reuse's assembled protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200922 Address after: No.959, Jiayuan Road, Yuanhe street, Xiangcheng District, Suzhou City, Jiangsu Province Applicant after: Suzhou Yuanlian Technology Pioneer Park Management Co.,Ltd. Address before: 510000 Tun Sheng Road, Desheng garden, Haizhuqu District, Guangzhou, Guangdong Applicant before: Qin Haohan |