CN114803823A - Lifting appliance for truss floor support plate and ALC (autoclaved lightweight concrete) wallboard - Google Patents

Lifting appliance for truss floor support plate and ALC (autoclaved lightweight concrete) wallboard Download PDF

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Publication number
CN114803823A
CN114803823A CN202210601109.5A CN202210601109A CN114803823A CN 114803823 A CN114803823 A CN 114803823A CN 202210601109 A CN202210601109 A CN 202210601109A CN 114803823 A CN114803823 A CN 114803823A
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plate
roller
hanger
hanging
truss floor
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CN202210601109.5A
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赵凯
于志福
薛梦园
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China 22MCC Group Corp Ltd
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China 22MCC Group Corp Ltd
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Priority to CN202210601109.5A priority Critical patent/CN114803823A/en
Publication of CN114803823A publication Critical patent/CN114803823A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

本发明公开了一种用于桁架楼承板及ALC墙板的吊具。包括吊梁，吊梁底面的两端通过柔性连接件对称悬吊结构相同的第一吊架和第二吊架，第一吊架包括水平的底梁，底梁的截面为倒U形，滚轮机构对称置于底梁的两端；滚轮机构包括下滚轮、下轮轴、上滚轮、上轮轴和侧板，底梁两侧的侧槽板的下端面与对称设置的下滚轮的踏面配合，下滚轮的外侧贴置竖向的侧板，与下滚轮配合的下轮轴穿过侧板；上滚轮对称置于底梁顶板上部的两侧，与上滚轮配合的上轮轴穿过侧板；两个下滚轮之间的下轮轴套装轴套，轴套由调整机构驱动；竖梁与侧板可拆卸连接，竖梁的上端与柔性连接件连接。本发明吊装可靠安全，防止桁架楼承板及ALC墙板的板材发生变形。

Figure 202210601109

The invention discloses a hanger for a truss floor deck and an ALC wall board. Including a hanging beam, the two ends of the bottom surface of the hanging beam are symmetrically suspended through a flexible connecting piece to suspend a first hanger and a second hanger with the same structure. The mechanism is placed symmetrically at both ends of the bottom beam; the roller mechanism includes a lower roller, a lower wheel shaft, an upper roller, an upper wheel shaft and a side plate. The outer side of the roller is attached with a vertical side plate, and the lower axle that cooperates with the lower roller passes through the side plate; the upper roller is symmetrically placed on both sides of the top plate of the bottom beam, and the upper axle that cooperates with the upper roller passes through the side plate; two The lower wheel axle between the lower rollers is fitted with a bushing, and the bushing is driven by an adjustment mechanism; the vertical beam and the side plate are detachably connected, and the upper end of the vertical beam is connected with a flexible connecting piece. The hoisting of the invention is reliable and safe, and the deformation of the plates of the truss floor deck and the ALC wall plate is prevented.

Figure 202210601109

Description

Lifting appliance for truss floor support plate and ALC (autoclaved lightweight concrete) wallboard
Technical Field
The invention relates to a lifting appliance, in particular to a lifting appliance for a truss floor bearing plate and an ALC wallboard.
Background
At present, the truss floor support plate and the ALC wallboard are usually directly hoisted by steel wire ropes, and because the rigidity of the truss floor support plate and the ALC wallboard is small, the steel wire ropes are in line contact with the plates in the hoisting process, so that the plates can be deformed, the construction quality is influenced, the plates can only be scrapped when the deformation exceeds a certain degree, the loss rate of the materials is increased, and the construction cost is increased.
The chinese patent with the granted publication number CN212832365U discloses an auxiliary lifting appliance for precast floor slabs, which is only suitable for precast floor slabs with large rigidity.
Disclosure of Invention
The invention aims to solve the technical problems and provides a lifting appliance for a truss floor support plate and an ALC wallboard, which can prevent the deformation of the plate, can be adjusted according to the width of the plate and has wide application range.
The invention solves the technical problem, and adopts the technical scheme that;
a lifting appliance for a truss floor support plate and an ALC (alcohol-vinyl alcohol) wallboard comprises a horizontal lifting beam and a flexible connecting piece, wherein the middle part of the top surface of the lifting beam is fixedly connected with a lifting plate provided with a round hole, two ends of the bottom surface of the lifting beam are symmetrically suspended with a first lifting frame and a second lifting frame which have the same structure through the flexible connecting piece, the first lifting frame comprises a horizontal bottom beam, an adjusting mechanism, a roller mechanism and a vertical beam, the cross section of the bottom beam is in an inverted U shape, and the roller mechanism is symmetrically arranged at two ends of the bottom beam; the roller mechanism comprises a lower roller, a lower wheel shaft, an upper roller, an upper wheel shaft and side plates, the lower end surfaces of the side groove plates on the two sides of the bottom beam are matched with treads of the lower rollers which are symmetrically arranged, the vertical side plates are attached to the outer sides of the lower rollers, and the lower wheel shaft matched with the lower roller penetrates through the side plates; the upper rollers are symmetrically arranged on two sides of the upper part of the top plate of the bottom beam, and an upper wheel shaft matched with the upper rollers penetrates through the side plate; a lower wheel shaft between the two lower rollers is sleeved with a shaft sleeve, and the shaft sleeve is driven by an adjusting mechanism; the vertical beam is detachably connected with the side plate, and the upper end of the vertical beam is connected with the flexible connecting piece.
Compared with the prior art, the invention adopting the technical scheme has the beneficial effects that;
simple structure, hoist and mount are reliable safe, prevent that the panel of truss building carrier plate and ALC wallboard from taking place to warp, can adjust according to the size of the panel of different specifications, improve handling efficiency, reduce loss, reduce cost.
Further, the optimization scheme of the invention is as follows:
the adjusting mechanism comprises a lead screw, lead screw nuts and a shaft seat, the lead screw is longitudinally arranged in a notch of the bottom beam and is positioned above the lower wheel shaft, the lead screw is rotatably connected with the bottom beam through the shaft seat, and the two lead screw nuts are respectively screwed on two sections of threads with opposite rotating directions of the lead screw; each screw nut is fixedly connected with the shaft sleeve of the lower wheel shaft, and one end of each screw is provided with a handle.
The outer peripheral surface of the screw nut is fixedly connected with an upper connecting plate, the outer peripheral surface of the shaft sleeve is fixedly connected with a lower connecting plate, and the upper connecting plate is fixedly connected with the lower connecting plate.
The number of the lower rollers and the number of the upper rollers on two sides of the roller mechanism are two respectively.
The bottom surface of the hanging beam is fixedly connected with a longitudinal hanging hole plate, and the hanging hole plate is symmetrically provided with a plurality of connecting holes.
The flexible connecting piece is a steel wire rope, a ring chain or a hanging strip.
The tread of the lower roller is provided with an annular groove, and the side slot plate of the bottom beam is embedded into the groove.
The two lifting hole plates are provided, a plurality of pairs of connecting holes are formed between the two lifting hole plates, and pin shafts are arranged in the connecting holes in a penetrating mode.
Drawings
FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is an enlarged view at B of FIG. 1;
FIG. 5 is an enlarged view at C of FIG. 3;
fig. 6 is a schematic view of a hanging beam and a hanging hole plate of an embodiment of the present invention.
In the figure: a hanger plate 1; a hanging beam 2; a hole hanging plate 3; a shackle 4 is mounted; a wire rope 5; a lower shackle 6; a first hanger 7; a second hanger 8; a bottom beam 9; a roller mechanism 10; a lower roller 10-1; a lower wheel axle 10-2; an upper roller 10-3; an upper wheel axle 10-4; 10-5 of a shaft sleeve; 10-6 parts of side plates; an adjustment mechanism 11; a screw rod 11-1; a screw nut 11-2; a support plate 11-3; a shaft seat 11-4; a handle 11-5; an upper connecting plate 11-6; a lower connecting plate 11-7; a vertical beam 12; a bolt 13; a pin 14.
Detailed Description
The invention is further described in detail below with reference to the figures and examples.
Referring to fig. 1 and 2, the present embodiment is a lifting appliance for truss floor deck plates and ALC wall panels, and mainly comprises a lifting plate 1, a lifting beam 2, a lifting hole plate 3, an upper shackle 4, a flexible connector 5, a lower shackle 6, a first lifting frame 7 and a second lifting frame 8. The hanging beam 2 is horizontally arranged and made of H-shaped steel, a web plate of the hanging beam is vertically arranged, a hanging plate 1 is welded in the middle of the top surface of an upper flange plate of the hanging beam, and a round hole is formed in the hanging plate 1 and used for being connected with a hanging hook of a hoisting machine. The middle part of the bottom surface of the lower flange plate of the hanging beam 2 is longitudinally welded with a rectangular hanging hole plate 3, the surface of the hanging hole plate 3 is vertical to the lower flange plate of the hanging beam 2, and the hanging hole plate 3 is symmetrically provided with a plurality of connecting holes. The upper shackles 4 are respectively arranged in the two symmetrical connecting holes, the upper shackles 4 are connected with the lower shackles 6 through flexible connecting pieces, the flexible connecting pieces are steel wire ropes, ring chains or hanging strips, the steel wire ropes 5 are preferably selected in the embodiment, the two lower shackles 6 are respectively arranged on the first hanging bracket 7 and the second hanging bracket 8, and the hanging beam 2 suspends the first hanging bracket 7 and the second hanging bracket 8 in a hanging manner.
First gallows 7 and second gallows 8 symmetry set up and the structure is the same, and first gallows 7 mainly comprises floorbar 9, gyro wheel mechanism 10, guiding mechanism 11 and perpendicular roof beam 12, and the floorbar 9 level sets up, and its cross-section is the shape of falling the U, and the preferred channel-section steel of material, the notch of channel-section steel is downward. The two ends of the bottom beam 9 are symmetrically provided with roller mechanisms 10, each roller mechanism 10 mainly comprises a lower roller 10-1, a lower wheel shaft 10-2, an upper roller 10-3, an upper wheel shaft 10-4 and a shaft sleeve 10-5 side plate 10-6, the lower end surfaces of the side groove plates on the two sides of the bottom beam 8 are symmetrically provided with the lower rollers 10-1, each side is provided with two rollers, the tread surface of the lower roller 10-1 is provided with an annular groove, the lower end surface of the side groove plate is embedded into the groove, the lower rollers 10-1 are matched with the side groove plates, and the shaft holes of the two symmetrical lower rollers 10-1 are internally provided with a lower wheel shaft 10-2. A side plate 10-6 is attached to the outer side of each of the two lower rollers 10-1, two ends of a lower wheel shaft 10-2 penetrate through the side plates 10-6 respectively, the penetrating end of the lower wheel shaft 10-2 is connected with the side plate 10-6 on the side through a clamping plate, the clamping plate is clamped in a clamping groove of the lower wheel shaft 10-2, and the clamping plate is connected with the outer side face of the side plate 10-6 through a bolt. The upper idler wheels 10-3 are symmetrically arranged on two sides of the upper portion of the top plate of the bottom beam 8, each side is provided with two upper idler wheels 10-3, the upper idler wheels 10-3 are located on the inner sides of the side plates 10-6, an upper wheel shaft 10-4 is mounted in shaft holes of the two symmetrical upper idler wheels 10-3, elastic check rings are mounted on the upper wheel shaft 10-4 on the inner sides of the upper idler wheels 10-3, the upper idler wheels 10-3 are limited by the elastic check rings, two ends of the upper wheel shaft 10-4 penetrate through the two side plates 10-6 respectively, the upper wheel shaft 10-4 is connected with the side plates 10-6 through a clamping plate, the clamping plate is clamped into a clamping groove of the upper wheel shaft 10-4, and the clamping plate is connected with the outer side faces of the side plates 10-6 through bolts. The lower wheel shaft 10-2 between the two lower rollers 10-1 at the inner end of the roller mechanism 10 is sleeved with a shaft sleeve 10-5.
The roller mechanism 10 is driven by an adjusting mechanism 11, the adjusting mechanism 11 mainly comprises a lead screw 11-1, a lead screw nut 11-2, a supporting plate 11-3, a shaft seat 11-4 and a handle 11-5, the lead screw 11-1 is longitudinally arranged in a notch of the bottom beam 9, one end of the lead screw extends out of the bottom beam 9, and the extending end is provided with a rotating handle 11-5. Two ends of the screw rod 11-1 are respectively connected with the shaft seats 11-4, the shaft seats 11-4 are connected with the supporting plate 11-3 through bolts, and the supporting plate 11-3 is welded on the bottom surface of the top plate of the bottom beam 9.
The screw rod 11-1 symmetrically processes two sections of rectangular threads with opposite turning directions, two screw rod nuts 11-2 are screwed with the two sections of threads with opposite turning directions respectively, each screw rod nut 11-2 is positioned right above the shaft sleeve 10-5, a radial upper connecting plate 11-6 is welded on the peripheral surface of the screw rod nut 11-2, the plate surface of the upper connecting plate 11-6 is vertical to the axis of the screw rod nut 11-2, a radial lower connecting plate 11-7 is welded on the peripheral surface of the shaft sleeve 10-5, and the upper connecting plate 11-6 is connected with the lower connecting plate 11-7 through bolts. The handle 11-5 is rotated, the screw rod 11-1 rotates along with the handle, the two screw rod nuts 11-2 move in the same or opposite directions, the screw rod nuts 11-2 drive the shaft sleeve 10-5 to move through the upper connecting plate 11-6 and the lower connecting plate 11-7, the shaft sleeve 10-5 drives the lower wheel shaft 10-2 to move, the lower wheel 10-1 and the upper wheel 10-3 are driven to roll, and the two wheel mechanisms move in the same or opposite directions.
Each roller mechanism is provided with a vertical beam 12, the vertical beam 12 is made of channel steel, the lower end of the vertical beam 12 is arranged between the two side plates 10-6, the vertical beam 12 is connected with the two side plates 10-6 through two bolts 13, the two bolts 13 respectively penetrate through the two flange plates of the vertical beam 12, and the two bolts 13 are horizontally arranged in parallel. The upper end of the vertical beam 12 is provided with a lower shackle 6.
The hanging hole plates 3 can be two (shown in figure 5), connecting holes are symmetrically formed between the two hanging hole plates 3, pin shafts 14 penetrate through the connecting holes, and the upper shackle 4 is connected with the pin shafts 14.
When the invention is used for the first time, the hanging plate 1 at the upper part of the hanging beam 2 is hung on the hanging hook of the hoisting machinery,
and two vertical beams 12 of the first hanger 7 are connected with the hanging plate 3 at the bottom of the hanging beam 2 through two equal-length steel wire ropes 5, an upper shackle 4 and a lower shackle 6, and then the second hanger 8 is connected with the hanging plate 3 to form a whole. The adjustment is carried out according to the sizes of the plates with different specifications, the handle 11-5 is rotated, and the distance between the two vertical beams 12 of the first hanging bracket 7 and the second hanging bracket 8 is adjusted to be suitable for the width of the plates. The distance between the first hanger 7 and the second hanger 8 is adjusted by the coupling hole of the orifice plate 3.
The lifting appliance is lifted to the side of the material level by the lifting machine, the first lifting frame 7 and the second lifting frame 8 fall to the ground, the upper shackle 6 at the upper end of the outer vertical beam 12 and the bolt 13 at the lower end of the outer vertical beam are dismounted, the vertical beam 12 is horizontally placed outwards, the plates are placed on the two bottom beams 9 by the forklift, the vertical beam 12 is reset and the upper shackle 6 is installed, the vertical beam 12 is adjusted again, and the vertical beam 12 is tightly attached to the outer side face of the plates for lifting.
The invention prevents the plate from sliding during lifting, protects the plate to be intact, has no crack and corner drop, reduces the loss rate and saves the cost. After the use, one of the two bolts 13 is detached, and the vertical beam 12 is folded, so that the occupied space is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.

Claims (8)

1.一种用于桁架楼承板及ALC墙板的吊具，包括水平的吊梁、柔性连接件，吊梁顶面的中部固接开设圆孔的吊板，其特征在于：1. a spreader for truss floor deck and ALC wall panel, including horizontal hanging beam, flexible connector, and the middle part of the hanging beam top surface is fixedly connected to open the hanging plate of a round hole, it is characterized in that: 所述吊梁底面的两端通过柔性连接件对称悬吊结构相同的第一吊架和第二吊架，第一吊架包括水平的底梁、滚轮机构、调整机构和竖梁，底梁的截面为倒U形，滚轮机构对称置于底梁的两端；Both ends of the bottom surface of the hanging beam are symmetrically suspending the first hanger and the second hanger with the same structure through flexible connectors. The first hanger includes a horizontal bottom beam, a roller mechanism, an adjustment mechanism and a vertical beam. The section is an inverted U shape, and the roller mechanism is placed symmetrically at both ends of the bottom beam; 所述滚轮机构包括下滚轮、下轮轴、上滚轮、上轮轴和侧板，底梁两侧的侧槽板的下端面与对称设置的下滚轮的踏面配合，下滚轮的外侧贴置竖向的侧板，与下滚轮配合的下轮轴穿过侧板；上滚轮对称置于底梁顶板上部的两侧，与上滚轮配合的上轮轴穿过侧板；两个下滚轮之间的下轮轴套装轴套，轴套由调整机构驱动；The roller mechanism includes a lower roller, a lower axle, an upper roller, an upper axle and a side plate. The lower end surfaces of the side groove plates on both sides of the bottom beam cooperate with the tread surfaces of the symmetrically arranged lower rollers, and the outer side of the lower roller is placed with a vertical The side plate, the lower wheel shaft that cooperates with the lower roller passes through the side plate; the upper roller is symmetrically placed on both sides of the top plate of the bottom beam, and the upper wheel shaft that cooperates with the upper roller passes through the side plate; the lower wheel shaft is sleeved between the two lower rollers The shaft sleeve is driven by the adjustment mechanism; 所述竖梁与侧板可拆卸连接，竖梁的上端与柔性连接件连接。The vertical beam is detachably connected with the side plate, and the upper end of the vertical beam is connected with the flexible connecting piece. 2.根据权利要求1所述的用于桁架楼承板及ALC墙板的吊具，其特征在于：所述调整机构包括丝杠、丝杠螺母和轴座，丝杠纵向置于底梁的槽口内并位于下轮轴的上方，丝杠通过轴座与底梁转动连接，两个丝杠螺母分别旋合在丝杠的两段旋向相反的螺纹上；每个丝杠螺母分别与下轮轴的轴套固接，丝杠的一端安装把手。2. the spreader for truss floor deck and ALC wall panel according to claim 1, it is characterized in that: described adjustment mechanism comprises lead screw, lead screw nut and axle seat, lead screw longitudinally is placed in the bottom beam Inside the slot and above the lower axle, the lead screw is rotatably connected to the bottom beam through the axle seat, and two lead screw nuts are respectively screwed on two opposite threads of the lead screw; each lead screw nut is connected to the lower axle respectively The shaft sleeve is fixedly connected, and the handle is installed at one end of the lead screw. 3.根据权利要求2所述的用于桁架楼承板及ALC墙板的吊具，其特征在于：所述丝杠螺母的外周面固接上连接板，轴套的外周面固接下连接板，上连接板与下连接板固接。3. The hanger for truss floor deck and ALC wall panel according to claim 2, characterized in that: the outer peripheral surface of the lead screw nut is fixedly connected to the upper connecting plate, and the outer peripheral surface of the shaft sleeve is fixedly connected to the lower connection The upper connecting plate is fixedly connected with the lower connecting plate. 4.根据权利要求1所述的用于桁架楼承板及ALC墙板的吊具，其特征在于：所述滚轮机构两侧的下滚轮和上滚轮分别为两个。4 . The hanger for truss floor slabs and ALC wall panels according to claim 1 , wherein the number of lower rollers and upper rollers on both sides of the roller mechanism is two. 5 . 5.根据权利要求1所述的用于桁架楼承板及ALC墙板的吊具，其特征在于：所述吊梁的底面固接纵向的吊孔板，吊孔板对称开设多个连接孔。5. the hanger for truss floor deck and ALC wall panel according to claim 1, it is characterized in that: the bottom surface of described hanging beam is fixed with the vertical hanging hole plate, and the hanging hole plate symmetrically opens a plurality of connection holes . 6.根据权利要求1所述的用于桁架楼承板及ALC墙板的吊具，其特征在于：所述柔性连接件为钢丝绳、环链或吊带。6 . The sling for truss floor deck and ALC wall panel according to claim 1 , wherein the flexible connector is a steel wire rope, a chain or a sling. 7 . 7.根据权利要求1所述的用于桁架楼承板及ALC墙板的吊具，其特征在于：所述下滚轮的踏面设有环形的凹槽，底梁的侧槽板嵌入该凹槽内。7. The hanger for truss floor deck and ALC wall panel according to claim 1, characterized in that: the tread of the lower roller is provided with an annular groove, and the side groove plate of the bottom beam is embedded in the groove Inside. 8.根据权利要求1所述的用于桁架楼承板及ALC墙板的吊具，其特征在于：所述吊孔板为两个，两个吊孔板之间开设多对连接孔，连接孔内穿装销轴。8. the hanger for truss floor deck and ALC wall panel according to claim 1, it is characterized in that: described hanging hole plate is two, between two hanging hole plates, many pairs of connecting holes are opened to connect A pin shaft is inserted into the hole.
CN202210601109.5A 2022-05-30 2022-05-30 Lifting appliance for truss floor support plate and ALC (autoclaved lightweight concrete) wallboard Pending CN114803823A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117188785A (en) * 2023-09-22 2023-12-08 中国二十二冶集团有限公司 Integrated insulation board construction technology

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Publication number Priority date Publication date Assignee Title
CN103204428A (en) * 2013-04-07 2013-07-17 中天建设集团浙江钢构有限公司 Loading-transporting lifting appliance for steel bar truss floor support plate
CN104495605A (en) * 2014-11-11 2015-04-08 中冶陕压重工设备有限公司 Compact working roll hoisting tool
CN106315387A (en) * 2015-06-30 2017-01-11 江苏华江祥瑞现代建筑发展有限公司 Lifting appliance for wallboards
WO2017011860A1 (en) * 2015-07-17 2017-01-26 Csr Building Products Limited Method of lifting panel with inserts
CN111824929A (en) * 2020-06-19 2020-10-27 沙洋柴能五金制品有限公司 Precast panel hoisting device for building
CN217376987U (en) * 2022-05-30 2022-09-06 中国二十二冶集团有限公司 Lifting appliance for truss floor support plate and ALC (autoclaved lightweight concrete) wallboard

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103204428A (en) * 2013-04-07 2013-07-17 中天建设集团浙江钢构有限公司 Loading-transporting lifting appliance for steel bar truss floor support plate
CN104495605A (en) * 2014-11-11 2015-04-08 中冶陕压重工设备有限公司 Compact working roll hoisting tool
CN106315387A (en) * 2015-06-30 2017-01-11 江苏华江祥瑞现代建筑发展有限公司 Lifting appliance for wallboards
WO2017011860A1 (en) * 2015-07-17 2017-01-26 Csr Building Products Limited Method of lifting panel with inserts
CN111824929A (en) * 2020-06-19 2020-10-27 沙洋柴能五金制品有限公司 Precast panel hoisting device for building
CN217376987U (en) * 2022-05-30 2022-09-06 中国二十二冶集团有限公司 Lifting appliance for truss floor support plate and ALC (autoclaved lightweight concrete) wallboard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117188785A (en) * 2023-09-22 2023-12-08 中国二十二冶集团有限公司 Integrated insulation board construction technology

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Application publication date: 20220729