CN111691663A - Two-way connecting piece of building steel sealing plate - Google Patents

Two-way connecting piece of building steel sealing plate Download PDF

Info

Publication number
CN111691663A
CN111691663A CN202010578299.4A CN202010578299A CN111691663A CN 111691663 A CN111691663 A CN 111691663A CN 202010578299 A CN202010578299 A CN 202010578299A CN 111691663 A CN111691663 A CN 111691663A
Authority
CN
China
Prior art keywords
plate
servo motor
shaped
fixedly connected
sealing plate
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.)
Pending
Application number
CN202010578299.4A
Other languages
Chinese (zh)
Inventor
周贤军
钱桂森
钱良东
周子承
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhu Tianda Heavy Industry Co ltd
Original Assignee
Wuhu Tianda Heavy Industry Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wuhu Tianda Heavy Industry Co ltd filed Critical Wuhu Tianda Heavy Industry Co ltd
Priority to CN202010578299.4A priority Critical patent/CN111691663A/en
Publication of CN111691663A publication Critical patent/CN111691663A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/08Forms, which are completely dismantled after setting of the concrete and re-built for next pouring
    • E04G11/085End form panels for walls
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/001Corner fastening or connecting means for forming or stiffening elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/06Tying means; Spacers ; Devices for extracting or inserting wall ties
    • E04G17/065Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
    • E04G17/0655Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
    • E04G17/0657Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts fully recoverable
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00Component parts or accessories for scaffolds
    • E04G5/004Storage and transport racks for scaffolding components
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H37/00Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/12Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
    • F16H37/124Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

The invention discloses a two-way connecting piece of a sealing plate made of building steel, which comprises an intermediate plate, clamping plates, a servo motor and a carrying box, wherein the intermediate plate is symmetrically arranged, the clamping plates are positioned at the end part of the intermediate plate and are symmetrically arranged relative to the intermediate plate, the end surfaces of the clamping plates, which are parallel to the intermediate plate, are provided with U-shaped grooves, and threaded rods are clamped in the U-shaped grooves; the servo motor is fixedly connected to the bottom of the carrying box and is in transmission connection with the threaded rod through a transmission mechanism, a transverse plate is arranged on the upper side of the servo motor and is fixedly connected to the inner side wall of the carrying box, a vertical plate is arranged on one side of the servo motor, and the vertical plate is fixedly connected to the upper surface of a bottom plate of the carrying box; the invention not only can rotate a plurality of threaded rods simultaneously, saves labor and time, but also can facilitate the storage of the threaded rods, bring convenience to workers and improve the working efficiency of the workers to a certain extent.

Description

Two-way connecting piece of building steel sealing plate
Technical Field
The invention relates to the technical field of building equipment, in particular to a steel sealing plate bidirectional connecting piece for a building.
Background
When a building with a concrete structure is built, some building components such as wall surfaces and the like of the building are poured on site; when the building component is subjected to concrete pouring, template assemblies of the building component are prepared, two templates are erected relatively in the assembly process, sealing plates are erected on two end faces of each template, the middle part of each template is in a rectangular state, and the sealing plates are locked and connected through connecting pieces; when the two-way connecting piece of the sealing plate on a part of the wall surface is detached after use, the detached connecting piece is generally placed on the ground directly, and then the connecting piece is transferred to a certain designated part through tools such as manual carrying or cart and the like, so that inconvenience is brought to workers.
Disclosure of Invention
The invention aims to provide a two-way connecting piece for a steel sealing plate of a building, which solves the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a two-way connecting piece of a building steel sealing plate comprises an intermediate plate, clamping plates, a servo motor and a carrying box, wherein the intermediate plate is symmetrically arranged, the clamping plates are positioned at the end part of the intermediate plate and are symmetrically arranged relative to the intermediate plate, a U-shaped groove is formed in the end surface, parallel to the intermediate plate, of each clamping plate, and a threaded rod is clamped in each U-shaped groove;
servo motor fixed connection is connected in the bottom of carrying the thing case and through drive mechanism and threaded rod transmission, servo motor's upside sets up the diaphragm, diaphragm fixed connection is on the inside wall of carrying the thing case, one side of servo motor sets up the riser, riser fixed connection is at the bottom plate upper surface of carrying the thing case.
Preferably, threaded connection has the rectangular block on the threaded rod, fixedly connected with U-shaped piece on the lateral wall of splint, the U-shaped piece cooperatees with the U-shaped groove, and the rectangular block card is established in the U-shaped piece.
Preferably, the one end that the threaded rod is relative passes through connecting rod fixed connection, and the threaded rod screw thread of connecting rod both sides sets up to opposite directions, and one of them fixedly connected with dwang on the threaded rod.
Preferably, drive mechanism includes the chain, servo motor's output shaft runs through the lateral wall of carrying the thing case, and equal fixedly connected with sprocket on servo motor's output shaft and the dwang, the chain cover is established on the sprocket.
Preferably, the four corners of the carrying box are provided with rollers which are rotatably connected to the lower surface of the carrying box bottom plate.
Preferably, a rectangular through hole is formed in the side wall of the carrying box, a sliding plate is connected to the rectangular through hole in a sliding mode, the sliding plate is arranged opposite to the vertical plate, and a pulling block is fixedly connected to the side wall, far away from the vertical plate, of the sliding plate.
Preferably, the slide way has been seted up to the up end of carrying the thing case, sliding connection has the U-shaped sliding block in the slide way, it is connected with T shape pull rod to rotate on the U-shaped sliding block, the horizontal segment of T shape pull rod contacts with the up end of carrying the thing case.
Preferably, a rotating shaft is rotatably connected to the U-shaped sliding block, and the lower end face of the T-shaped pull rod is fixedly connected to the rotating shaft.
Compared with the prior art, the invention has the beneficial effects that: the threaded rods and the rectangular blocks are arranged on the clamping plates, so that the clamping plates can be conveniently controlled to move, and the chain wheels and the chains matched with the chain wheels are arranged on the threaded rods and the output shaft of the motor, so that a plurality of threaded rods can be conveniently rotated simultaneously, and the labor and the time are saved; the roller and the T-shaped pull rod are arranged on the carrying box, so that the position of the carrying box is convenient to move, the T-shaped pull rod is convenient to store by arranging the chute on the carrying box, and the threaded rod and the chain are convenient to store by arranging the transverse plate and the vertical plate in the carrying box; the wall sealing plate bidirectional connecting piece can rotate a plurality of threaded rods simultaneously, saves labor and time, is convenient for storing the threaded rods, brings convenience to workers, and improves the working efficiency of the workers to a certain extent.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a perspective view of the carrier case of the present invention;
FIG. 5 is a schematic view of a front connection structure of the loading box and the servo motor according to the present invention;
FIG. 6 is a right side view of the inner structure of the container of the present invention;
fig. 7 is a partially enlarged structural view of a portion a in fig. 6.
In the figure: 1 middle plate, 2 clamping plates, 21U-shaped grooves, 22U-shaped blocks, 3 servo motors, 4 object carrying boxes, 41 rollers, 42 rectangular through holes, 43 sliding plates, 44 pulling blocks, 45 sliding grooves, 46U-shaped sliding blocks, 461 rotating shafts, 47T-shaped pull rods, 5 threaded rods, 51 rectangular blocks, 52 connecting rods, 53 rotating rods, 6 transmission mechanisms, 61 chains, 62 chain wheels, 7 transverse plates and 8 vertical plates.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a building steel seals board two-way connection spare, includes intermediate lamella 1, splint 2, servo motor 3 and carries thing case 4, and 1 symmetry in intermediate lamella sets up, and splint 2 are located the tip of intermediate lamella 1 and set up about 1 symmetry in intermediate lamella, are convenient for press from both sides intermediate lamella 1 tightly fixed, and U-shaped groove 21 has been seted up to splint 2 and the terminal surface that intermediate lamella 1 paralleled, and U-shaped groove 21 card is equipped with threaded rod 5, the removal of the control splint 2 of being convenient for.
Servo motor 3 fixed connection is connected in the bottom of carrying thing case 4 and through drive mechanism 6 and the transmission of threaded rod 5, the rotation of the control threaded rod 5 of being convenient for, servo motor 3's upside sets up diaphragm 7, diaphragm 7 fixed connection is on carrying thing case 4's inside wall, is convenient for deposit threaded rod 5 that finishes using, one side of servo motor 3 sets up riser 8, riser 8 fixed connection is at the bottom plate upper surface that carries thing case 4.
Threaded connection has rectangular block 51 on the threaded rod 5, fixedly connected with U-shaped piece 22 on the lateral wall of splint 2, and U-shaped piece 22 cooperatees with U-shaped groove 21, and rectangular block 51 card is established in U-shaped piece 22, is convenient for pass through the rotation of threaded rod 5 and the cooperation of U-shaped piece 22 to the removal of control rectangular block 51 promotes the removal of splint 2 through the removal of rectangular block 51, makes splint 2 press from both sides intermediate lamella 1 tight fixedly.
The relative one end of threaded rod 5 passes through connecting rod 52 fixed connection, and the threaded rod 5 screw thread of connecting rod 52 both sides sets up to opposite directions, and fixedly connected with dwang 53 on one of them threaded rod 5, the rotation through dwang 53 drives the rotation of threaded rod 5.
Drive mechanism 6 includes chain 61, and servo motor 3's output shaft runs through the lateral wall of carrying thing case 4, and equal fixedly connected with sprocket 62 on servo motor 3's output shaft and the dwang 53, and chain 61 cover is established on sprocket 62, through the cooperation of chain 61 with sprocket 62, and the rotation of the servo motor 3 control threaded rod 5 of being convenient for.
All be provided with gyro wheel 41 in the four corners department of carrying thing case 4, gyro wheel 41 rotates to be connected at the lower surface of carrying thing 4 bottom plates of case, is convenient for carry the removal of thing 4 positions.
The rectangular through hole 42 has been seted up on the lateral wall of year thing case 4, sliding connection has a sliding plate 43 on the rectangular through hole 42, sliding plate 43 can control opening and close of rectangular through hole 42, be convenient for open riser 8, diaphragm 7, carry the cavity that forms between the relative lateral wall of thing case 4 and the sliding plate 43, sliding plate 43 sets up with riser 8 is relative, and sliding plate 43 keeps away from fixedly connected with on the lateral wall of riser 8 and draws piece 44, the removal of the control sliding plate 43 of being convenient for.
Slide groove 45 has been seted up to the up end of carrying thing case 4, and sliding connection has U-shaped sliding block 46 in slide groove 45, rotates on the U-shaped sliding block 46 to be connected with T shape pull rod 47, and T shape pull rod 47's horizontal segment contacts with the up end of carrying thing case 4, and the pulling of being convenient for carries thing case 4 to change the position that carries thing case 4 and locate.
The U-shaped sliding block 46 is rotatably connected with a rotating shaft 461, and the lower end face of the T-shaped pull rod 47 is fixedly connected to the rotating shaft 461, so that the T-shaped pull rod 47 can be conveniently and rotatably connected to the U-shaped sliding block 46.
The working principle is as follows: in the use process of the invention, the threaded rod 5 is placed in the U-shaped groove 21, the rectangular blocks 51 are clamped in the U-shaped blocks 22, the chain 61 is sleeved on the chain wheel 62 on the threaded rod 5 which is vertically arranged and the chain wheel 62 on the output shaft of the servo motor 3, when the servo motor 3 works, the output shaft of the servo motor 3 is matched with the chain 61 through the chain wheel 62 to drive the rotating rod 53 to rotate, and the two opposite rectangular blocks 51 move oppositely because the thread turning directions of the two opposite threaded rods 5 are oppositely arranged and limited by the U-shaped blocks 22, so that the clamping plate 2 clamps and fixes the middle plate 1, thereby realizing the sealing of the wall surface.
After finishing using, servo motor 3's antiport, drive the rotation of threaded rod 5, make relative rectangular block 51 antiport that sets up, take off chain 61, pulling pull block 44, open rectangle through-hole 42, and place chain 61 in riser 8, diaphragm 7, carry the wall body that thing case 4's inner wall and sliding plate 43 formed, take off threaded rod 5 again and place on carrying the diaphragm 7 on thing case 4, upwards stimulate T shape pull rod 47, and stimulate pull rod 47 and drive the removal of carrying the thing case 4 position, thereby will carry thing case 47 to assigned position, it is convenient to have brought for the staff.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a building steel seals board two-way connection spare, includes intermediate lamella (1), splint (2), servo motor (3) and carries thing case (4), its characterized in that: the middle plate (1) is symmetrically arranged, the clamping plates (2) are positioned at the end part of the middle plate (1) and are symmetrically arranged relative to the middle plate (1), the end surfaces of the clamping plates (2) parallel to the middle plate (1) are provided with U-shaped grooves (21), and threaded rods (5) are clamped in the U-shaped grooves (21);
servo motor (3) fixed connection is connected in the bottom of carrying thing case (4) and through drive mechanism (6) and threaded rod (5) transmission, the upside of servo motor (3) sets up diaphragm (7), diaphragm (7) fixed connection is on the inside wall of carrying thing case (4), one side of servo motor (3) sets up riser (8), riser (8) fixed connection is at the bottom plate upper surface of carrying thing case (4).
2. The two-way connector for steel sealing plate of building as claimed in claim 1, wherein: threaded connection has rectangular block (51) on threaded rod (5), fixedly connected with U-shaped piece (22) on the lateral wall of splint (2), U-shaped piece (22) cooperate with U-shaped groove (21), and rectangular block (51) card is established in U-shaped piece (22).
3. The two-way connecting piece for the sealing plate made of construction steel as claimed in claim 2, wherein: connecting rod (52) fixed connection is passed through to the relative one end in threaded rod (5), and threaded rod (5) screw thread of connecting rod (52) both sides sets up to opposite directions, and one of them fixedly connected with dwang (53) on threaded rod (5).
4. The two-way connecting piece for the steel sealing plate of the building as claimed in claim 3, wherein: drive mechanism (6) include chain (61), the output shaft of servo motor (3) runs through the lateral wall of carrying thing case (4), and equal fixedly connected with sprocket (62) on the output shaft of servo motor (3) and dwang (53), chain (61) cover is established on sprocket (62).
5. The two-way connector for steel sealing plate of building as claimed in claim 1, wherein: the four corners of the carrying box (4) are provided with idler wheels (41), and the idler wheels (41) are rotatably connected to the lower surface of the bottom plate of the carrying box (4).
6. The two-way connector for steel sealing plate of building as claimed in claim 1, wherein: the side wall of the carrying box (4) is provided with a rectangular through hole (42), the rectangular through hole (42) is connected with a sliding plate (43) in a sliding mode, the sliding plate (43) is arranged opposite to the vertical plate (8), and the sliding plate (43) is fixedly connected with a pulling block (44) on the side wall far away from the vertical plate (8).
7. The two-way connector for steel sealing plate of building as claimed in claim 1, wherein: slide groove (45) have been seted up to the up end of carrying thing case (4), sliding connection has U-shaped sliding block (46) in slide groove (45), it is connected with T shape pull rod (47) to rotate on U-shaped sliding block (46), the horizontal segment of T shape pull rod (47) contacts with the up end of carrying thing case (4).
8. The two-way connector for steel sealing plate of construction as claimed in claim 7, wherein: the U-shaped sliding block (46) is connected with a rotating shaft (461) in a rotating mode, and the lower end face of the T-shaped pull rod (47) is fixedly connected to the rotating shaft (461).
CN202010578299.4A 2020-06-23 2020-06-23 Two-way connecting piece of building steel sealing plate Pending CN111691663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010578299.4A CN111691663A (en) 2020-06-23 2020-06-23 Two-way connecting piece of building steel sealing plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010578299.4A CN111691663A (en) 2020-06-23 2020-06-23 Two-way connecting piece of building steel sealing plate

Publications (1)

Publication Number Publication Date
CN111691663A true CN111691663A (en) 2020-09-22

Family

ID=72483152

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010578299.4A Pending CN111691663A (en) 2020-06-23 2020-06-23 Two-way connecting piece of building steel sealing plate

Country Status (1)

Country Link
CN (1) CN111691663A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114856174A (en) * 2022-06-01 2022-08-05 张良 Assembled building construction template

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545463A (en) * 1981-10-06 1985-10-08 Gunnar Olovsson Vertically adjustable picking box
US5906381A (en) * 1997-03-21 1999-05-25 Hovatter; Steven Tool storage and transport system
US6244064B1 (en) * 1998-11-23 2001-06-12 Arthur Powell Combination toolbox-cooler device
US20040129857A1 (en) * 2003-01-07 2004-07-08 Symons Corporation Concrete wall form with flexible tie system
CN207686297U (en) * 2017-12-19 2018-08-03 南通中厦建筑工程总承包有限公司 A kind of constructional form fixing apparatus
CN210289145U (en) * 2019-01-17 2020-04-10 西北民族大学 Fixing device of concrete structure template

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545463A (en) * 1981-10-06 1985-10-08 Gunnar Olovsson Vertically adjustable picking box
US5906381A (en) * 1997-03-21 1999-05-25 Hovatter; Steven Tool storage and transport system
US6244064B1 (en) * 1998-11-23 2001-06-12 Arthur Powell Combination toolbox-cooler device
US20040129857A1 (en) * 2003-01-07 2004-07-08 Symons Corporation Concrete wall form with flexible tie system
CN207686297U (en) * 2017-12-19 2018-08-03 南通中厦建筑工程总承包有限公司 A kind of constructional form fixing apparatus
CN210289145U (en) * 2019-01-17 2020-04-10 西北民族大学 Fixing device of concrete structure template

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114856174A (en) * 2022-06-01 2022-08-05 张良 Assembled building construction template
CN114856174B (en) * 2022-06-01 2024-03-15 张良 Assembled building construction template

Similar Documents

Publication Publication Date Title
CN111691663A (en) Two-way connecting piece of building steel sealing plate
CN206732435U (en) The erection welding frock of soft-package battery module
CN113894574A (en) Metal fixture with multiple clamping modes
CN204322273U (en) A kind of former of rebar cylinder mould combined wall board
CN216616901U (en) Brick moving device for building construction
CN212047407U (en) Tubular product conveyer convenient to transport
CN216684964U (en) Automatic packaging equipment of box
CN206677443U (en) A kind of structure-steel framing for being used for helical guideway and rack welding
CN212096893U (en) Concrete conveyer for construction
CN212532141U (en) Electromechanical integrated lifting device
CN107598865A (en) One kind machining rollover stand
CN211315354U (en) Pipeline erecting device
CN211699527U (en) A show board for engineering cost
CN212895600U (en) Canvas cutting equipment
CN216765517U (en) Road surface patching device is used in building engineering construction
CN213356721U (en) Reinforced concrete pipe hoisting device
CN113020345A (en) Material bending device for building construction
CN218766910U (en) Be used for ore geology environmental monitoring equipment
CN215801052U (en) Template support frame is used in public road bridge roof beam construction
CN216551610U (en) Bridge girder erection construction platform of bridge girder erection machine
CN216316552U (en) Supervision land building progress recording device
CN213464215U (en) Auxiliary index analysis device for power distribution network engineering cost
CN215987911U (en) Construction progress display device for construction management of building engineering
CN213488124U (en) Display device for art design
CN211765679U (en) Building construction material transportation equipment

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
RJ01 Rejection of invention patent application after publication

Application publication date: 20200922

RJ01 Rejection of invention patent application after publication