CN201439636U - Door type scaffold - Google Patents

Abstract

The utility model discloses a door type scaffold, this door type scaffold include portal and big horizontal pole, and the portal includes the portal frame of compriseing portal horizontal pole and pole setting, still includes the fastener of compriseing buckle hoop strip and two fastening portions, and fastening portion is fixed with the portal frame, and big horizontal pole is fixed between buckle hoop strip and portal frame. The preferable technical scheme comprises the following steps: fixing the small cross bar on the large cross bar by using a binding belt; fixing the guardrail rod on the upright rod of the portal by using a binding belt; the door frame comprises a first door frame and a second door frame which are adjacent in the longitudinal direction and different in width, and a large cross rod extends out of a fastener of the first door frame to be fixed with a door frame cross rod of the second door frame. The utility model discloses in, distance between the portal is no longer subject to the length of big horizontal pole, consequently, can reduce door-type scaffold's cost, and does not need the big horizontal pole cooperation of multiple model, just can make the door-type scaffold of putting up suit with the vertical size of building, and then can reduce the stock of door-type scaffold spare part.

Description

a portal scaffolding

technical field

The utility model relates to a construction tool, in particular to a portal scaffold.

Background technique

At present, in building construction, it is often necessary to set up appropriate scaffolding to facilitate construction operations at high places. Among them, portal scaffolding is widely used because of its convenient and efficient construction and dismantling.

Portal scaffolding generally includes a door frame and a large cross bar; the door frame includes a door frame cross bar and two vertical bars, and the two ends of the door frame bar are respectively fixed with the two vertical bars to form a door frame; when installing the scaffold, In the longitudinal direction, connect and fix the multi-piece gantry with appropriate large crossbars; in the vertical direction, use an adapted structure to fix the multi-piece gantry to form a scaffold with appropriate strength and size. Carry out building construction work. Since the portal frame is a unit of the portal scaffold, the number of components of the scaffold can be greatly reduced, so the transportation and installation of the portal scaffold are very convenient and the efficiency is also very high.

At present, in order to improve the convenience and efficiency of portal scaffolding construction and dismantling, people standardize and serialize the parts of portal scaffolding; in this way, when building portal scaffolding, the appropriate type of portal frame can be selected according to actual needs And large crossbars can form a portal scaffold of suitable height to meet the needs of building construction.

In order to ensure the connection between the large crossbar and the door frame, in the prior art, there is a specially made connection mechanism at the connection between the large crossbar and the door frame. Although the connection mechanism in the prior art can realize the connection between the large crossbar and the door frame, there are certain problems: the connection mechanism between the large crossbar and the door frame increases the manufacturing cost of the scaffold; at the same time, the connection mechanism It also makes the scaffolding construction and dismantling process more cumbersome, reducing the work efficiency of scaffolding construction and dismantling; in addition, the connecting mechanism also makes a non-rigid hinge point between the large crossbar and the portal frame, thereby weakening the rigidity of the portal scaffolding. strength and stability.

Due to the lack of strength and stability of the existing portal scaffolding, it is necessary to lay scaffolding boards on each working surface of the portal scaffolding to increase the strength and stability of the portal scaffolding; however, during the construction of the external wall, A two-step working layer can meet the requirements of the working surface. Laying scaffolding boards on each working surface obviously causes waste of scaffolding boards; at the same time, laying scaffolding boards at every step distance will also allow construction workers to freely use scaffolding boards Building materials are piled up on the scaffolding, which makes it easy to overload the scaffolding, which affects construction safety.

In addition, during the construction process, when there are balconies, air-conditioning panels or railings, there will be convex structures on the surface of the building; using the existing technology to provide scaffolding, when the length of the large crossbar does not match the convex structure, It is necessary to use large crossbars of various types or lengths to match the scaffolding with the convex structure on the surface of the building; in this way, it is necessary to prepare large crossbars of various lengths, increase the inventory of equipment, and make the construction use The difficulty of material management increases, which increases the construction cost. Moreover, it is also difficult to ensure that there is a suitable distance between the scaffold and the work surface with large crossbars of various types or lengths; when the distance between the portal scaffold and the work surface is not suitable, the construction work will be very difficult.

Utility model content

In view of the above defects, the purpose of this utility model is to provide a portal scaffold with low cost and higher construction and dismantling efficiency.

The portal scaffolding provided by the utility model includes a vertically arranged portal frame and a horizontally arranged large cross bar. The portal frame includes a portal frame composed of a portal frame bar and two vertical bars. The portal frame bar The two ends are respectively fixed with two vertical bars, and the door frame also includes fasteners, which fix the large cross bar and the door frame frame, so as to adjust the fixed position of the large cross bar and the door frame frame to adjust the The distance between the door frames.

Preferably, the portal scaffold further includes a small crossbar fixed to the large crossbar with binding straps.

Preferably, the portal frame further includes a shield fixed to the portal frame, and the projection of the fastener on the horizontal plane is located within the projection of the shield on the horizontal plane.

Preferably, the fastener is fixed to the cross bar of the mast; the mast includes an upper mast and a lower mast which are vertically adjacent, and the shielding part of the upper mast is connected to the buckle of the lower mast. relatively.

Preferably, the shielding member is a channel steel, and the opening of the channel steel faces downward.

Preferably, it is characterized in that a small horizontal bar is fixed above the large horizontal bar to form a working layer; the height of the upper plane of the working layer is equal to the height of the upper plane of the shielding member.

Preferably, the portal scaffold further includes a guardrail fixed to the upright with a binding strap.

Preferably, the door frame includes a first door frame and a second door frame adjacent in the longitudinal direction, the width of the first door frame is smaller than the width of the second door frame, and the large cross bar includes a first inner large The cross bar, the first inner large cross bar protrudes from the fastener of the first door frame, and is fixed with the door frame cross bar of the second door frame.

Preferably, the first inner large cross bar is fixed to the door frame cross bar of the second door frame by binding straps.

Preferably, the binding strap is a plastic binding strap.

Compared with the prior art, in the portal scaffold provided by the utility model, the large crossbar and the door frame frame are fixed by fasteners, the large crossbar can be ordinary steel pipes or other building materials, and no special connecting mechanism is required, thus The manufacturing cost of the portal scaffold is reduced; at the same time, the method of fixing the large crossbar through fasteners is very simple, which makes the construction and dismantling of the portal scaffold more convenient, and further improves the work efficiency of the portal scaffold construction and dismantling. In addition, when the building has a protruding structure, the fastener can fix the large crossbar and the door frame at an appropriate position, and the distance between the door frames can be adjusted as needed. Therefore, there is no need for various types of large crossbars to cooperate , the portal scaffolding can be built to adapt to the longitudinal size of the building, and there is no need to prepare various types of large crossbars, thereby reducing the inventory of portal scaffolding parts and reducing the difficulty of management of construction materials.

In a further technical solution, the door frame also includes a shielding piece, and the projection formed by the fastener on the horizontal plane is located within the projection formed by the shielding piece on the horizontal plane; therefore, during the construction process, the shielding piece intercepts the The mortar falling from above prevents the fasteners from sticking to the mortar, thus making the removal of the portal scaffold more convenient.

In a further technical solution, the large cross bar and the door frame cross bar are fixed by fasteners, and the shielding part of the upper door frame is opposite to the fastener of the lower door frame. Such a technical solution makes the door frame cross bar The shielding parts are respectively located at the upper part and the lower part of the portal frame, and the shielding parts not only have the function of intercepting mortar, but also can increase the strength of the portal frame, thereby increasing the strength of the portal scaffolding.

In a further technical solution, the shielding member is a channel steel opening downwards, which can better prevent the fastener from sticking to the falling mortar, thereby better keeping the surface of the fastener clean during construction; Mortar makes it difficult to dismantle portal scaffolding. In addition, using channel steel as a shield is also beneficial to increase the rigidity of the door frame.

In a further technical solution, in the working layer composed of small horizontal bars, the upper side of the small horizontal bar, that is, the height of the upper plane of the working layer is equal to the height of the upper plane of the shielding member, which is The laying of the scaffolding provides convenience.

In a further technical solution, the gantry includes a first gantry and a second gantry with different widths, and when building a gantry scaffold, one end of the first inner large cross bar fixed with the first gantry extends to the second gantry. The door frame cross bar of the second door frame is fixed on the door frame cross bar of the second door frame. Since the fixed position of the first inner large cross bar and the second door frame can be adjusted according to the convex structure of the building, it is very convenient It is convenient to adapt the portal scaffolding to the convex structure of the building; at the same time, it can reduce the types of spare parts, thereby further reducing the inventory of portal scaffolding parts and simplifying the management of construction materials.

Description of drawings

Fig. 1 is a schematic diagram of the front view direction structure of the door frame provided by the embodiment;

Fig. 2 is the structural representation of the fastener that embodiment provides;

Fig. 3 is the transverse sectional structure schematic diagram of the portal scaffold provided by the embodiment;

Fig. 4 is the enlarged view of part I——I of the gantry joint in Fig. 3;

Fig. 5 is a schematic diagram of the cross-sectional structure of A——A at the connection of the door frame in Fig. 3;

Fig. 6 is a structural schematic diagram of another door frame provided by the utility model in the front view direction;

Fig. 7 is a structural schematic diagram of the external direction of the portal scaffold provided by the embodiment;

Fig. 8 is a three-dimensional structural schematic diagram of the portal scaffold provided by the embodiment;

Fig. 9 is a schematic structural view of another small horizontal bar provided by the present invention;

Fig. 10 is a schematic structural diagram in a top view direction of the portal scaffold provided by the embodiment of the present invention.

Among Fig. 1 to Fig. 10: door frame 1, lower door frame 102, upper door frame 101, first door frame 103, second door frame 104, pole 11, plug 111, plug seat 112, door frame cross bar 12, buckle Part 13, channel steel 14, fastening part 131, buckle hoop 132, diagonal tie rod 15, large cross bar 2, outer large cross bar 200, first inner large cross bar 201, second inner large cross bar 202, small cross bar Rod 21 , blocking rod 212 , scaffolding board 22 , barrier rod 6 , binding belt 7 ; building 100 , interface 300 .

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.

It should be noted that: In this article, with reference to the building using portal scaffolding, the longitudinal direction is the direction parallel to the main construction surface of the building in the horizontal plane; the transverse direction is the direction perpendicular to the main construction surface of the building ; The vertical direction is the direction perpendicular to the horizontal plane.

The embodiment provides a portal scaffold, which includes a portal frame 1 and a large cross bar 2 . Please refer to Fig. 1, Fig. 1 is the schematic diagram of the front view direction structure of the door frame provided by the embodiment; The direction of 11 is basically parallel, and the two ends of the door frame cross bar 12 are respectively fixed with two upright bars 11; Those skilled in the art can understand that the door frame frame can also have a variety of specific structures. In order to increase the strength and stability of the door frame 1, other structures that can increase the strength can also be established; in this example, two diagonal stay rods are provided. 15. Both ends of each diagonal stay rod 15 are respectively fixed to the door frame cross bar 12 and a vertical rod 11; multiple door frame cross bars 12 and/or multiple vertical rods 11, etc. can also be provided.

In the longitudinal direction, the portal scaffold connects multiple portal frames 1 through a large cross bar 2 . 1 and 2, FIG. 2 is a schematic structural view of the fastener provided by the embodiment. The door frame 1 includes a fastener 13. The fastener 13 includes a buckle strip 132 and two fastening parts 131. The two fastening parts 131 Located at both ends of the buckle bar 132 respectively, the fastening part 132 is fixed to the door frame cross bar 12; the buckle hoop bar 132 is bent upwards to form an appropriate space between the buckle hoop bar 132 and the door frame cross bar 12, so that the large horizontal The bar 2 passes through, and the large cross bar 2 is fixed between the buckle bar 132 and the door frame cross bar 12; overall. Since the connection point between the large cross bar 2 and the door frame 1 is a rigid connection point, the strength and stability of the formed door scaffold are greatly improved. In this example, a door frame 1 includes two fasteners 13 , so one door frame 1 is fixedly connected with two large cross bars 2 . The two large crossbars 2 extend longitudinally, and the extension directions are basically parallel; in order to increase the span between the two large crossbars 2 and make the portal scaffold more stable after construction, the two fasteners 13 can be respectively Close to the two ends of the mast cross bar 12. It can be understood that under certain circumstances, a plurality of fasteners 13 can also be provided on the door frame cross bar 12. In this way, when building a portal scaffold, the door frame 1 can be fixed to a plurality of large cross bars 2 according to actual needs. , to increase the stability of the gantry scaffolding; the fastener 13 is not limited to being fixed with the gantry cross bar 12, and can also be fixed with the vertical bar 11; in order to maintain the reliability of fixing between the large cross bar 2 and the gantry 1, Fasteners are used to fix the fastener 13 and the door frame cross bar 12, so that an appropriate force is maintained between the buckle strip 132 and the large cross bar 2.

In the vertical direction, multiple door frames 1 are connected by their proper structures. As shown in Figure 1, the upper end of the vertical rod 11 of the gantry 1 has a plug 111, and the lower end has a plug seat 112. In this example, the vertical rod 11 is a steel pipe, and the plug 111 is a cylindrical steel bar with a diameter slightly smaller than the inner diameter of the steel pipe. A plug socket 112 is formed. Referring to Fig. 3 and Fig. 4, Fig. 3 is a schematic cross-sectional structural diagram of a portal scaffold provided by the embodiment, and Fig. 4 is an enlarged view of part I—I of the portal frame connection in Fig. 3 . For convenience of description, the upper door frame 1 may be called an upper door frame 101 , and the lower door frame 1 may be called a lower door frame 102 . When building a portal scaffold, the plugs 111 at the upper ends of the two vertical poles 11 of the lower mast 102 are matched with the plug sockets 112 at the lower ends of the vertical poles 11 of the upper mast 101 respectively, so that the upper mast 101 and the lower mast 102 are connected. ; In the vertical direction, multiple door frames 1 can be combined into a relatively fixed whole in the same way. It can be understood that the way of fixing the upper door frame 101 and the lower door frame 102 is not limited to the above-mentioned structure, the lower end of the vertical rod 11 can be a plug 111, and the upper end can be a plug seat 112; Other connecting structures are established between 11 to fix the upper door frame 101 and the lower door frame 102 together.

Since the multi-piece gantry 1 is relatively fixed in the longitudinal and vertical directions, the formed gantry scaffold can maintain proper stability and strength, which provides convenience for building construction operations. Those skilled in the art can understand that in order to increase the stability and reliability of the portal scaffold, appropriate wall rods and diagonal stay rods can also be provided according to actual construction needs. In the portal scaffold provided by the utility model, the large cross bar 2 and the door frame cross bar 12 are fixed by fasteners 13, and there is no need to set other specific connecting mechanisms between the two ends of the large cross bar 2 and the door frame 1, so that the door frame can be lowered. At the same time, the method of fixing the large crossbar 2 by the fastener 13 is very simple, which makes the construction and dismantling process of the portal scaffold very simple, and then improves the work efficiency of the portal scaffold construction and removal. In addition, the fastener 13 can fix the large crossbar 2 and the door frame 1 at an appropriate position according to actual needs, and the distance between the door frames 1 can be adjusted as required, and is no longer limited by the fixed length of the large crossbar 2 Therefore, without the cooperation of various large crossbars 2, the portal scaffold can be easily adapted to the longitudinal dimension of the building 100, reducing the difficulty of constructing the portal scaffold.

Since the portal scaffolding provided by the utility model has greater strength and stability, it is not necessary to increase the strength of the portal scaffolding by laying scaffolding boards on each working surface; scaffolding boards can be laid at appropriate positions according to actual needs . During the construction of the exterior wall, it is only necessary to lay two-step scaffolding boards to carry out construction work on the corresponding working surface, thereby greatly reducing the use of scaffolding boards and reducing construction costs; at the same time, due to the laying of fewer scaffolding boards, it also promotes construction. Personnel clean up building materials in a timely manner to avoid random stacking of building materials on the scaffolding, reduce the load of portal scaffolding, and eliminate potential safety hazards of portal scaffolding.

Those skilled in the art can understand that during the construction process, there will inevitably be mortar falling; during the falling process of mortar, it will inevitably fall on the portal scaffolding. When the mortar falls on the fastener, because the part of the fastener 13 is uneven, it is difficult to clean up after the mortar is hardened; moreover, the hardened mortar will also affect the removal of the portal scaffold and the next construction; When the fastener connects the fastener 13 and the door frame cross bar 12, the falling mortar will make the fastener difficult to loosen, which will also cause the removal of the portal scaffold and the difficulty of next installation.

In order to avoid the occurrence of the above situation, a shielding member can also be arranged at the lower part of the door frame 1 . As shown in FIG. 1 , the schematic diagram of the structure of the portal frame provided by the embodiment in the front view direction, the shielding member is a channel steel 14 with an opening downward. Referring to Fig. 3 and Fig. 5, Fig. 3 is a schematic cross-sectional structural diagram of a portal scaffold provided by the embodiment, and Fig. 5 is a schematic cross-sectional structural schematic diagram of A—A of the portal frame connection in Fig. 3 . The channel steel 14 is located at the lower part of the gantry 1, and the gantry cross bar 12 is located at the upper part of the gantry 1; after the gantry scaffolding is completed, the channel steel 14 of the upper gantry 1 is just at the fastener of the lower gantry 1 13, and the projection of the fastener 13 on the horizontal plane is located within the projection of the channel steel 14 on the horizontal plane; in this way, during the construction process, the channel steel 14 will cover the fastener 13 so that the mortar cannot reach the fastener 13, In this way, the fastener 13 is prevented from sticking to the mortar, so that the fastener 13 is kept clean, and difficulties in disassembly and next installation are avoided. In this example, the channel steel 14 is also in contact with the large cross bar 2. Under the gravity of the upper part, the channel steel 14 exerts an appropriate force on the large cross bar 2 to clamp the large cross bar 2 and make the large cross bar 2 Rod 2 cannot slide longitudinally. According to the above description, those skilled in the art can also use other specific methods to prevent the large cross bar 2 from sliding, for example: when the fastening part 131 of the fastener 13 is fixed to the door frame cross bar 12 with fasteners, the buckle can be made The hoop 132 maintains a corresponding force on the large cross bar 2; an appropriate part of the large cross bar 2 can also be set as a structure matched with the buckle hoop 132, and so on.

Those skilled in the art can understand that the shielding member is not limited to the channel steel 14, and the steel plate or angle steel with appropriate width can also intercept the mortar and prevent the fastener 13 from sticking to the mortar; in addition, in this example, the channel steel 14 and the door frame cross bar 12 has a larger span, and the channel steel 14 also has the effect of strengthening the rigidity of the door frame 1. It can be understood that the shielding part on the door frame 1 can also be kept at a relatively small distance from the fastener 13; referring to Fig. 6, Fig. 6 is a schematic structural view of another door frame provided by the present invention; the channel steel 14 Located above the door frame cross bar 12, the channel steel 14 completely covers the fastener 13 on the same door frame 1 to achieve the above purpose; at the same time, in order to ensure that the door frame 1 has appropriate rigidity, it can also be added at the lower part of the door frame 1 Reinforcing rod 16.

In order to facilitate construction workers to carry out construction work, appropriate scaffold boards also need to be laid on the portal scaffold. Referring to Fig. 7 and Fig. 8, Fig. 7 is a schematic diagram of the external structure of the portal scaffold provided by the embodiment, and Fig. 8 is a schematic diagram of the three-dimensional structure of the portal scaffold provided by the embodiment. The portal scaffold also includes a plurality of small crossbars 21 and scaffolding boards 22; the two ends of the small crossbars 21 are placed on the large crossbars 2 respectively to form a working layer where the scaffolding boards 22 can be laid, and there are suitable gaps between the small crossbars 21 Distance, in order to provide enough supporting force for the scaffold board 22 above. In order to make scaffolding 22 laying more convenient, as shown in Figure 5, the A——A cross-sectional structural schematic diagram of the door frame joint in Figure 3, the height of the upper plane of the working layer is equal to the height of the upper plane of the channel steel Like this, the top of little cross bar 21 is in a plane with channel steel 14 upper planes, when laying scaffold board 22, just can make scaffold board 22 contact with small cross bar and channel steel 14 very easily simultaneously, make each The small crossbar 21 can provide bearing force for the scaffold board 21; it can also ensure the stress uniformity of the scaffold board 22 during construction. Of course, when other components are used as the shielding member, the upper side or the surface thereof can be kept flush with the highest side of the small horizontal bar 21 to facilitate the laying of the scaffold board 22 . In order to ensure the stability of the small cross bar 21, the small cross bar 21 and the large cross bar 2 can be fixed with a binding strap 7. The preferred technical solution is to fix the small cross bar 21 and the large cross bar 2 with plastic binding straps 7. Compared with the use of fasteners, the significance of using plastic binding straps is: first, the plastic binding straps are light in weight and easy to carry. The characteristics can make the transportation, construction and disassembly of scaffolding parts more convenient; second, the cost of plastic binding straps is low, and the use of plastic binding straps has the characteristics of high recycling rate, which can further reduce the cost of scaffolding. It can be understood that in certain circumstances, in order to meet actual needs, metal binding straps can also be used, which can also make scaffolding more convenient to build and disassemble.

It can be understood that appropriate mechanisms can also be set at the ends of the small cross bar 21, for example: as shown in Figure 9, the structural representation of another small cross bar provided by the utility model can be set at The stop bar 211 that stretches out below; Also can establish suitable mechanism on big cross bar 2 and make small cross bar 21 fix, guarantee the convenience of small cross bar 21 dismounting simultaneously.

When it is necessary to install the guardrail, the appropriate guardrail bar 6 can be bound to the vertical pole 11 of the door frame 1 with the binding band 7; the connection position of the guardrail pole 6 and the vertical pole 11 is not limited to the connecting mechanism , therefore, the barricade bar 6 can be connected in a suitable position according to the needs of actual construction, further reducing the cost of portal scaffolding; the barricade bar 6 can also be fixed with plastic binding straps, and the above-mentioned technical effects can also be produced.

During the building construction process, when the building 100 has a protruding structure, door frames 1 with different widths can be selected to cooperate with each other, so as to keep an appropriate distance between the scaffolding and the construction work surface. Please refer to Fig. 10, Fig. 10 is the structural schematic view of the portal scaffold provided by the embodiment of the present invention; The width of the door frame 104 . There is an interface 300 between the protruding structure of the building 100 and the common surface, and the two sides of the interface 300 are respectively built with a first door frame 103 and a second door frame 104 of appropriate width. The door frame cross bar 12 of the first door frame 103 and the second door frame 104 has two fasteners 13 respectively, and the inner sides of a plurality of first door frames 103 are connected together by the first inner large cross bar 201; The inner sides of the two masts 104 are connected together through the second inner large cross bar 202 ; the outer sides of the first mast 103 and the second mast 104 are connected together through the outer large cross bar 200 . The first inner large cross bar 201 stretches out the first door frame 103, and stretches out toward the second door frame 104 direction, and its extended end is fixed with the door frame cross bar 12 of the second door frame 104, makes the first door frame like this 103 and the second door frame 104 are connected as a whole. In the present utility model, the connection position between the first inner large cross bar 201 and the second door frame 104 can be determined according to the position of the interface 200 , and does not need to be determined according to the length of the first inner large cross bar 201 . Therefore, the first inner large horizontal bar 201 can be extended to a suitable length according to needs, and the first inner large horizontal bar 201 and the second door frame 104 can be fixed at a suitable position; there is no need to prepare first inner large horizontal bars of various lengths. Rod 201; therefore, the inventory of portal scaffold parts is reduced, thereby reducing the management difficulty of construction materials and reducing the cost of portal scaffolding; It can be selected according to actual needs, therefore, it can ensure that there is an appropriate distance between the working layer of the portal scaffold and the construction work surface, thereby providing convenience for the construction work.

Those skilled in the art can understand that when the building 100 has multiple convex structures, more door frames 1 with different widths can be combined to build a portal scaffold; 7 is fixed to the door frame cross bar 12 of the first door frame 104, and can also be fixed by other methods. The fastener 13 is adapted to meet the needs of different convex structures of the building 100 .

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (10)

1. A portal scaffold, comprising a vertically arranged portal frame and a horizontally arranged large cross bar, the portal frame comprising a portal frame made up of a portal frame bar and two vertical bars, the portal frame bar The two ends are respectively fixed with two upright poles, and it is characterized in that the door frame also includes fasteners, and the fasteners fix the large cross bar and the door frame frame, so that by adjusting the distance between the large cross bar and the door frame frame, The fixed position adjusts the distance between the masts. 2. The portal scaffold according to claim 1, further comprising a small cross bar fixed to the large cross bar with a binding strap. 3. The portal scaffold according to claim 2, characterized in that, the portal frame further comprises a shield fixed to the portal frame, and the projection of the fastener on the horizontal plane is located on the horizontal plane of the shield. in the projection above. 4. portal scaffold according to claim 3, is characterized in that, described fastener and portal frame cross bar are fixed; Described portal frame comprises vertically adjacent upper portal frame and lower portal frame, and the upper portal frame of described upper portal frame The shielding part is opposite to the fastening part of the lower door frame. 5 . The portal scaffold according to claim 4 , wherein the shielding member is a channel steel, and the opening of the channel steel faces downward. 6 . 6. The portal scaffold according to claim 3, 4 or 5, wherein a small cross bar is fixed above the large cross bar to form a working layer; the height of the upper plane of the working layer is the same as the height of the The heights of the upper planes of the shielding parts are equal. 7. The portal scaffold according to any one of claims 1-5, characterized in that it further comprises a guard rail fixed to the vertical pole by a binding strap. 8. The portal scaffold according to any one of claims 1-5, wherein the portal frame comprises a first portal frame and a second portal frame adjacent in the longitudinal direction, the first portal frame The width is smaller than the width of the second door frame, and the large cross bar includes a first inner large cross bar, and the first inner large cross bar protrudes from the fastener of the first door frame, and is connected with the door frame of the second door frame. The crossbar is fixed. 9. The portal scaffold according to claim 8, characterized in that, the first inner large cross bar and the portal frame cross bar of the second portal frame are fixed by binding straps. 10. The portal scaffold according to any one of claims 2-5, characterized in that, the said binding strap is a plastic binding strap.

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