CN106672641A - Gypsum drywall feeding device - Google Patents

Gypsum drywall feeding device Download PDF

Info

Publication number
CN106672641A
CN106672641A CN201710056271.2A CN201710056271A CN106672641A CN 106672641 A CN106672641 A CN 106672641A CN 201710056271 A CN201710056271 A CN 201710056271A CN 106672641 A CN106672641 A CN 106672641A
Authority
CN
China
Prior art keywords
hydraulic stem
feeding device
elevating hopper
dumper
transport trolley
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
CN201710056271.2A
Other languages
Chinese (zh)
Inventor
徐立新
周富涛
田军
孙利国
李欣
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.)
Lanzhou Xin Sheng Science And Technology Co Ltd
Original Assignee
Lanzhou Xin Sheng Science And Technology 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 Lanzhou Xin Sheng Science And Technology Co Ltd filed Critical Lanzhou Xin Sheng Science And Technology Co Ltd
Priority to CN201710056271.2A priority Critical patent/CN106672641A/en
Publication of CN106672641A publication Critical patent/CN106672641A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B3/00Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
    • B62B3/02Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving parts being adjustable, collapsible, attachable, detachable or convertible
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G65/00Loading or unloading
    • B65G65/23Devices for tilting and emptying of containers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Revetment (AREA)

Abstract

The invention relates to the field of gypsum drywall mechanical equipment, in particular to a gypsum drywall feeding device. The gypsum drywall feeding device comprises a transport trolley and a feeding hopper, wherein the transport trolley and the feeding hopper are connected in a matched mode through hydraulic rods. The feeding hopper is installed in the transport trolley. Supporting blocks are symmetrically arranged on the two sides of the feeding hopper. Idler wheels are symmetrically arranged on the lower portion of the transport trolley. A front rod lifting switch and a rear rod lifting switch are arranged on the side face of the transport trolley side by side. Pushing handles are symmetrically arranged on the rear portion of the transport trolley. The hydraulic rods comprise the front hydraulic rod and the rear hydraulic rod. Connection bosses are arranged at the bottom of the feeding hopper. The hydraulic rods are rotationally connected with the connection bosses through rotating shafts. Bases are arranged at the bottoms of the hydraulic rods. A buffer bottom plate is arranged at the bottom ends of the bases. Buffer springs are arranged at the bottom of the buffer bottom plate and on the bottom face of the interior of the transport trolley. The bases and the buffer bottom plate are fixedly connected through bolts and nuts. The gypsum drywall feeding device is convenient to operate and easy to manufacture and has great practical prospects.

Description

A kind of plaster board wall feeding device
Technical field
The present invention relates to plaster board wall technical field of mechanical equipment, and in particular to a kind of plaster board wall feeding device.
Background technology
The light partition wall that plasterboard partition wall is constituted with Gypsum Fibrosum thin plate or hollow gypsum batten, can be used to separate the interior space, With simple structure, the characteristics of being easy to processing and install.
19 end of the centurys, various countries start to do internal partition wall with gypsum sheet material, are that a kind of yield in the world is larger and application is wider Light building material.This partition wall generally does skeleton using steel rough ground, and can be equipped with other materials (such as according to requirements Mineral wool board, water-repellent paint and decoration plane material etc.) composition has the partition wall of sound insulation, waterproof or senior finishing requirement.20 century 70s, China starts Paper-faced gyp thin plate and hollow gypsum batten are tested and produced, and applies in architectural engineering.
Plasterboard partition wall species plasterboard Chinese at present has:Thistle board, fibrous plaster and hollow gypsum batten Three kinds.1. Thistle board be with Gypsum Fibrosum as core, two sides cover paper strengthen and made by light sheet;2. fibrous plaster be with Gypsum Fibrosum is Binder Materials, with various organic or inorganic fibers (such as paper fiber, vegetation fiber, glass fibre etc.) as reinforcing material And made by light sheet, thick is 8~12 millimeters, and weight is 7~9 kg/ms2;3. hollow gypsum batten, and with Gypsum Fibrosum as glue Gel material, blends hollow made by various light materials or reinforcing fiber (such as expanded vermiculite, expanded perlite, glass fibre etc.) Partition plate, thick 60~100 millimeters, wall weighs 40~60 kg/ms2.Paper and fibrous plaster thin plate are needed with steel, wood, Gypsum Fibrosum dragon Bone is that skeleton constitutes partition wall.Hollow gypsum batten is not required to skeleton and can constitute partition wall because itself having certain rigidity.Plasterboard Material is easy to cutting processing, but is also easily damaged, therefore in transport and installation process needs special-purpose machines and tools.During construction and installation, it is Ensure that piece will not ftracture, it should be noted that plate stitch position arrangement, edge joint position must be dealt carefully with special cementing material.
1. the function of plasterboard partition wall insulates against sound.It is double that the double-layer separate sound-proof wall constituted with thin plate and hollow lath are constituted Layer sound-proof wall, its defening effect are approximately equivalent to the brick wall of 24 cm thicks, and sound reduction index is up to 40~50 decibels.2. prevent fires.Gypsum Fibrosum Plate belongs to non-combustible material, and with certain fire protecting performance, what is had can be used as the fireproof jointing sheath of steel construction.3. intensity.When body of wall When lateral load is 250 handkerchief, the lateral maximum distortion of body of wall is not more than high 1/240 of wall.4. humidity regulation.When wet in air When degree is bigger than the water content of itself, the moisture in plasterboard energy absorption air;Conversely, then plasterboard can be with the water in discharge plate Point, can play a part of to adjust humidity in room air.
It is in the production process of plaster board wall, fewer for the feeding device of plaster board wall production, it is existing general upper Material device, its lifting performance be not good, is easily caused the problem of the inconvenient operation of feeding device.
Therefore, the present invention provides a kind of plaster board wall feeding device, solves the feeding device lifting property that prior art is present Can not be good, operate the problems such as not enough facilitating.
The content of the invention
The purpose of the present invention is that:Feeding device lifting performance for presently, there are is not good, and operation not enough facilitates etc. A kind of problem, there is provided plaster board wall feeding device, the feeding device lifting performance for solving prior art presence be not good, and operation is inadequate Convenient problem.
To achieve these goals, the technical solution used in the present invention is:
A kind of plaster board wall feeding device, the feeding device include by hydraulic stem be mutually matched connection dumper and Elevating hopper, the elevating hopper are arranged on haul in-car, and the both sides of the elevating hopper are symmetrically arranged with support block;The haul The bottom of car is symmetrically arranged with roller, and its side has been arranged side by side front bar direction switch and rear bar direction switch;The dumper Rear portion is also symmetrically arranged with pushing hands;The hydraulic stem includes front hydraulic stem and rear hydraulic stem, and the front hydraulic stem is arranged on described The front portion of elevating hopper and the dumper, the rear hydraulic stem are arranged on the rear portion of the elevating hopper and dumper;The feeding The bottom of bucket is provided with the connection boss corresponding with the front hydraulic stem and rear hydraulic stem, and the hydraulic stem is convex with the connection Pass through the rotatable connection of connecting shaft between platform;The bottom of the hydraulic stem is provided with base, and the bottom of the base is provided with Buffering base plate, the bottom of the buffering base plate are provided with buffer spring, and the buffer spring is arranged on inside the dumper On bottom surface;It is fixedly connected by screw bolt and nut between the base and the buffer board;The hydraulic stem is by some mutual The rod member closing connection composition matched somebody with somebody, the connecting portion between adjacent rod member are provided with sealing ring.
The present invention can realize the raising and lowering of elevating hopper and inclination discharging operations, transport the raw material of plaster board wall Defeated and feeding is more convenient to operate.
The support block primarily serves the effect that the auxiliary hydraulic stem supports the elevating hopper, also functions to auxiliary stopper work With, it is to avoid hydraulic stem dropping distance during decline is excessive;Haul of the setting of the roller beneficial to the dumper Traveling is convenient;The front bar direction switch and rear bar direction switch, beneficial to adjusting and control the front hydraulic stem and rear hydraulic stem Adjustable height, by the height for adjusting front hydraulic stem and rear hydraulic stem, it is possible to achieve the inclination discharging of the elevating hopper;It is described The setting of pushing hands is then beneficial to manually push or pull on the dumper, it is ensured which is carried and conveniently moving.
The setting of the connection boss, beneficial to the connection between hydraulic stem and the elevating hopper, the hydraulic stem with it is described By the rotatable connected mode of connecting shaft between connection boss, it is the angle of inclination provides convenient for adjusting the elevating hopper.
The base that the bottom of the hydraulic stem is arranged, beneficial to the support hydraulic stem;It is slow that the bottom of the base is arranged Base plate is rushed, and the bottom of the buffering base plate is provided with buffer spring, beneficial to buffer protection being provided in hydraulic stem lifting process, keeps away Exempting from hydraulic stem is subject to too quickly dynamics to impact;It is fixedly connected by screw bolt and nut between the base and the buffer board, profit In being connected each other, it is ensured that the lifting of the elevating hopper is stable;The hydraulic stem is by some rod members being mutually matched Closing connection composition, the connecting portion between adjacent rod member are provided with sealing ring, can conveniently realize the lifting of the elevating hopper, Hydraulic oil is avoided to reveal simultaneously.
The present invention is easy to operate, it is easy to manufacture, with preferable practical prospect.
Preferably, the profile of the discharge port is intilted flume structure, beneficial to the raw material of plaster board wall is carried out During discharging, raw material can be poured out into the elevating hopper quickly.
Preferably, the quantity of the support block is 4, wherein 2 used as one group, is symmetricly set on the elevating hopper both sides Front and rear, it is spacing beneficial to aiding in the hydraulic stem to carry out.
Preferably, the front hydraulic stem and rear hydraulic stem are respectively symmetrically and are provided with 2, are rising beneficial to the guarantee elevating hopper Stationarity in drop and discharger manipulation.
Preferably, the base roller is provided with 4, is respectively arranged in 4 corners of the dumper bottom, beneficial to institute State the smooth-ride of dumper.
Preferably, the through hole being mutually matched with the connecting shaft is provided with the connection boss.
As a result of above-mentioned technical proposal, the invention has the beneficial effects as follows:
First, the present invention can realize the raising and lowering and inclination discharging operations of elevating hopper, make the original of plaster board wall Material transport and feeding are more convenient to operate.
Secondly, the support block primarily serves the effect that the auxiliary hydraulic stem supports the elevating hopper, also functions to auxiliary Position-limiting action, it is to avoid hydraulic stem dropping distance during decline is excessive;The setting of the roller is beneficial to the dumper Haul traveling it is convenient;The front bar direction switch and rear bar direction switch, beneficial to adjust and control the front hydraulic stem and after The adjustable height of hydraulic stem, by the height for adjusting front hydraulic stem and rear hydraulic stem, it is possible to achieve the inclination of the elevating hopper is unloaded Material;The setting of the pushing hands is then beneficial to manually push or pull on the dumper, it is ensured which is carried and conveniently moving.
Again, the setting of the connection boss, beneficial to the connection between hydraulic stem and the elevating hopper, the hydraulic stem with By the rotatable connected mode of connecting shaft between the connection boss, it is the angle of inclination provider for adjusting the elevating hopper Just.
Finally, the base that the bottom of the hydraulic stem is arranged, beneficial to the support hydraulic stem;The bottom of the base is arranged Buffering base plate, the bottom of the buffering base plate is provided with buffer spring, beneficial to protecting to buffering is provided in hydraulic stem lifting process Shield, it is to avoid hydraulic stem is subject to too quickly dynamics to impact;Fixed by screw bolt and nut between the base and the buffer board and connected Connect, beneficial to being connected each other, it is ensured that the lifting of the elevating hopper is stable;The hydraulic stem is mutually matched by some Rod member closing connection composition, the connecting portion between adjacent rod member are provided with sealing ring, can conveniently realize the elevating hopper Lifting, while avoiding hydraulic oil from revealing.
The present invention is easy to operate, it is easy to manufacture, with preferable practical prospect.
Description of the drawings
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the rising operating diagram of the present invention;
Fig. 3 is the dumper structural representation of the present invention;
Fig. 4 is the elevating hopper structural representation of the present invention;
Fig. 5 is the elevating hopper and hydraulic stem connection heeling condition schematic diagram of the present invention;
Fig. 6 is the connection boss and elevating hopper attachment structure schematic diagram of the present invention.
In figure:1st, dumper;2nd, elevating hopper;3rd, roller;4th, discharge port;5th, support block;6th, pushing hands;7th, front bar lifting is opened Close;8th, rear bar direction switch;9th, rear hydraulic stem;10th, connect boss;11st, connecting shaft;12nd, buffer base plate;13rd, front hydraulic stem; 14th, base;15th, buffer spring;16th, bolt;17th, nut;18th, sealing ring.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is The a part of embodiment of the present invention, rather than the embodiment of whole, based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1, as shown in figs. 1 to 6:
A kind of plaster board wall feeding device, the feeding device include the dumper 1 that connection is mutually matched by hydraulic stem With elevating hopper 2, in the dumper 1, the both sides of the elevating hopper 2 are symmetrically arranged with support block 5 to the elevating hopper 2; The bottom of the dumper 1 is symmetrically arranged with roller 3, and its side has been arranged side by side front bar direction switch 7 and rear bar direction switch 8;1 rear portion of the dumper is also symmetrically arranged with pushing hands 6;The hydraulic stem includes front hydraulic stem 13 and rear hydraulic stem 9, it is described before Hydraulic stem 13 is arranged on the front portion of the elevating hopper 2 and the dumper 1, and the rear hydraulic stem 9 is arranged on 2 He of the elevating hopper The rear portion of dumper 1;The bottom of the elevating hopper 2 is provided with the connection corresponding with the front hydraulic stem 13 and rear hydraulic stem 9 Boss 10, passes through 11 rotatable connection of connecting shaft between the hydraulic stem and the connection boss 10;The bottom of the hydraulic stem Portion is provided with base 14, and the bottom of the base 14 is provided with buffering base plate 12, and the bottom for buffering base plate 12 is provided with slow Spring 15 is rushed, the buffer spring 15 is arranged on the bottom surface inside the dumper 1;The base 14 and the buffer board it Between be fixedly connected with nut 17 by bolt 16;The hydraulic stem is made up of some rod member closing connections being mutually matched, adjacent Connecting portion between rod member is provided with sealing ring 18.
The present invention can realize the raising and lowering of elevating hopper 2 and inclination discharging operations, transport the raw material of plaster board wall Defeated and feeding is more convenient to operate.
The support block 5 primarily serves the effect that the auxiliary hydraulic stem supports the elevating hopper 2, also functions to auxiliary stopper Effect, it is to avoid hydraulic stem dropping distance during decline is excessive;The setting of the roller 3 is beneficial to the dumper 1 Haul traveling is convenient;The front bar direction switch 7 and rear bar direction switch 8, beneficial to adjusting and control 13 He of front hydraulic stem The adjustable height of hydraulic stem 9 afterwards, by the height for adjusting front hydraulic stem 13 and rear hydraulic stem 9, it is possible to achieve the elevating hopper 2 Incline discharging;The setting of the pushing hands 6 is then beneficial to manually push or pull on the dumper 1, it is ensured which is carried and conveniently moving.
The setting of the connection boss 10, beneficial to the connection between hydraulic stem and the elevating hopper 2, the hydraulic stem and institute State by 11 rotatable connected mode of connecting shaft between connection boss 10, the angle of inclination to adjust the elevating hopper 2 provides It is convenient.
The base 14 that the bottom of the hydraulic stem is arranged, beneficial to the support hydraulic stem;The bottom of the base 14 is arranged Buffering base plate 12, it is described buffering base plate 12 bottom be provided with buffer spring 15, beneficial to in hydraulic stem lifting process provide Buffer protection, it is to avoid hydraulic stem is subject to too quickly dynamics to impact;Between the base 14 and the buffer board pass through bolt 16 and Nut 17 is fixedly connected, beneficial to being connected each other, it is ensured that the lifting of the elevating hopper 2 is stable;The hydraulic stem by Some rod member closing connection compositions being mutually matched, the connecting portion between adjacent rod member are provided with sealing ring 18, can be conveniently The lifting of the elevating hopper 2 is realized, while avoiding hydraulic oil from revealing.
The present invention is easy to operate, it is easy to manufacture, with preferable practical prospect.
Preferably, the profile of the discharge port 4 is intilted flume structure, beneficial to the raw material of plaster board wall is carried out During discharging, raw material can be poured out into the elevating hopper 2 quickly.
Preferably, the quantity of the support block 5 is 4, wherein 2 used as one group, is symmetricly set on 2 liang of the elevating hopper The front and rear of side, it is spacing beneficial to aiding in the hydraulic stem to carry out.
Preferably, the front hydraulic stem 13 and rear hydraulic stem 9 are respectively symmetrically and are provided with 2, beneficial to ensureing the elevating hopper 2 Stationarity in lifting and discharger manipulation.
Preferably, 14 roller 3 of the base is provided with 4, is respectively arranged in 4 corners of 1 bottom of the dumper, profit In the smooth-ride of the dumper 1.
Preferably, the through hole being mutually matched with the connecting shaft 11 is provided with the connection boss 10.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any Those familiar with the art can readily occur in change or replacement in the technical scope of present disclosure, should all contain Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims (6)

1. a kind of plaster board wall feeding device, it is characterised in that:The feeding device includes being mutually matched connection by hydraulic stem Dumper and elevating hopper, the elevating hopper is arranged on that the haul is in-car, and the both sides of the elevating hopper are symmetrically arranged with support Block;The bottom of the dumper is symmetrically arranged with roller, and its side has been arranged side by side front bar direction switch and rear bar direction switch; The dumper rear portion is also symmetrically arranged with pushing hands;The hydraulic stem includes front hydraulic stem and rear hydraulic stem, the front hydraulic stem The front portion of the elevating hopper and the dumper is arranged on, after the rear hydraulic stem is arranged on the elevating hopper and dumper Portion;The bottom of the elevating hopper is provided with the connection boss corresponding with the front hydraulic stem and rear hydraulic stem, the hydraulic stem Pass through the rotatable connection of connecting shaft between the connection boss;The bottom of the hydraulic stem is provided with base, the base Bottom be provided with buffering base plate, the bottom of the buffering base plate is provided with buffer spring, and the buffer spring is arranged on described On bottom surface inside dumper;It is fixedly connected by screw bolt and nut between the base and the buffer board;The hydraulic stem It is made up of some rod member closing connections being mutually matched, the connecting portion between adjacent rod member is provided with sealing ring.
2. a kind of plaster board wall feeding device as claimed in claim 1, it is characterised in that:The profile of the discharge port is inside Inclined flume structure.
3. a kind of plaster board wall feeding device as claimed in claim 2, it is characterised in that:The quantity of the support block is 4, Wherein 2, as one group, are symmetricly set on the front and rear of the elevating hopper both sides.
4. a kind of plaster board wall feeding device as claimed in claim 3, it is characterised in that:The front hydraulic stem and rear hydraulic stem It is respectively symmetrically and is provided with 2.
5. a kind of plaster board wall feeding device as claimed in claim 4, it is characterised in that:The base roller is provided with 4, It is respectively arranged in 4 corners of the dumper bottom.
6. as claimed in any one of claims 1 to 5, wherein a kind of plaster board wall feeding device, it is characterised in that:The connection is convex The through hole being mutually matched with the connecting shaft is provided with platform.
CN201710056271.2A 2017-01-25 2017-01-25 Gypsum drywall feeding device Pending CN106672641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710056271.2A CN106672641A (en) 2017-01-25 2017-01-25 Gypsum drywall feeding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710056271.2A CN106672641A (en) 2017-01-25 2017-01-25 Gypsum drywall feeding device

Publications (1)

Publication Number Publication Date
CN106672641A true CN106672641A (en) 2017-05-17

Family

ID=58860191

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710056271.2A Pending CN106672641A (en) 2017-01-25 2017-01-25 Gypsum drywall feeding device

Country Status (1)

Country Link
CN (1) CN106672641A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108684332A (en) * 2018-07-27 2018-10-23 江苏海瑞通机械有限公司 A kind of rice wheat combine harvester with screening function divides standing grain thresher
CN110723180A (en) * 2019-10-19 2020-01-24 徐州鑫固钢模有限公司 Shock attenuation transport vechicle that steel construction used

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108684332A (en) * 2018-07-27 2018-10-23 江苏海瑞通机械有限公司 A kind of rice wheat combine harvester with screening function divides standing grain thresher
CN110723180A (en) * 2019-10-19 2020-01-24 徐州鑫固钢模有限公司 Shock attenuation transport vechicle that steel construction used

Similar Documents

Publication Publication Date Title
CN201962821U (en) Building bearing wall
CN201972288U (en) Floor structure of lightweight-steel villa
CN201835403U (en) Building wall body
CN101338615A (en) Automatic plastering machine
CN106672641A (en) Gypsum drywall feeding device
CN201065634Y (en) Automatic plastering machine
CN211597154U (en) Assembled heat-preservation sound-insulation board
CN201614705U (en) Structure of heat-preservation sound-insulation wall
CN203961115U (en) A kind of decoration integrated Multi-function light concrete composite plates of self-heat conserving and curtain wall
CN111727776B (en) Combined sunlight greenhouse of heat insulation material
CN211690738U (en) Cold-formed thin-wall light steel structure building
CN203145232U (en) Novel energy-saving insulation wall
CN207419699U (en) A kind of energy-saving and environment-friendly industrialization prefabricated buildings structure
CN210126541U (en) Efficient material loading and unloading device for building
CN111101594A (en) A cold-formed thin-walled light steel structure building
CN211900255U (en) A bay window structure of a building
CN105649240A (en) Folded plate type inorganic high-strength keel light wall
CN206494446U (en) Material conveyer on a kind of plaster board wall
CN102108756B (en) Composite wallboard, production method thereof, and connection structure
CN203626133U (en) Thermal-insulating external wall panel with steel frame
CN113417440A (en) Quick plastering unit of wall brick is used to fitment is built in room
CN106586420A (en) Loading conveyer for gypsum board wall
CN208056378U (en) A kind of high-noise equipment soundproof wall
CN220451172U (en) Moistureproof partition wall at bottom of gypsum board
CN202039503U (en) Composite wallboard and connecting structures thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20170517

WD01 Invention patent application deemed withdrawn after publication