CN111088889A

CN111088889A - Anti-falling device, wall-attached support and attached lifting scaffold

Info

Publication number: CN111088889A
Application number: CN201911403668.XA
Authority: CN
Inventors: 潘国俊
Original assignee: Shanxi Ping'an Renhe Technology Co Ltd
Current assignee: Shanxi Ping'an Renhe Technology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-01
Anticipated expiration: 2039-12-30
Also published as: CN111088889B

Abstract

The invention provides a falling prevention device, a wall-attached support and an attached lifting scaffold. The anti-falling device comprises a swinging piece, the middle part of the swinging piece body structure is provided with a central hole, and the outer edge of the swinging piece body structure is respectively provided with a return spring hole, a brake chuck, a shifting fork and a brake bottom drag; the return spring hole and the shifting fork are oppositely arranged on the outer edge of the swinging piece body structure, and the brake chuck and the brake bottom bracket are oppositely arranged; the return spring hole is used for connecting a return spring. When the return spring is in an initial state, the shifting fork is used for extending into the space between adjacent crosspieces, and the brake chuck is positioned at the upper part of the shifting fork and is not intersected with the connecting line of the crosspieces. The brake chuck is configured to: and under the state that the shifting fork is shifted downwards by the crosspiece, the brake chuck extends into the space between the adjacent crosspieces of the scaffold guide rail and is used for blocking the scaffold guide rail from moving downwards under the braking state. The invention discloses a swinging piece with an innovative structure, which has the advantages of better anti-falling performance, higher sensitivity and stable operation process.

Description

Anti-falling device, wall-attached support and attached lifting scaffold

Technical Field

The invention relates to the field of scaffolds, in particular to a falling prevention device, a wall-attached support and an attached lifting scaffold.

Background

The attached lifting scaffold equipment is a novel scaffold technology which is rapidly developed in the early century, and has important influence on the progress of construction technology in China. It becomes the low place operation with the eminence operation, becomes the inside operation of support body with unsettled operation, has apparent low carbon nature, high-tech content and characteristics such as more economic, safer, more convenient.

The attached lifting scaffold is an outer scaffold which is erected at a certain height, attached to an engineering structure, can ascend or descend layer by layer along with the engineering structure by virtue of self lifting equipment and devices and is provided with an anti-overturning and anti-falling device; the attached lifting scaffold mainly comprises an attached lifting scaffold frame body structure, an attached support, an anti-tilting device, an anti-falling device, a lifting mechanism, a control device and the like.

The anti-falling device is the most key device for ensuring the scaffold in an unexpected emergency, and the traditional anti-falling device has the problems of poor anti-falling performance, long braking distance, poor sensitivity and the like.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a fall arrest device, a wall-attached support, and an attached lifting scaffold, which obviate or mitigate one or more of the disadvantages of the related art.

The technical scheme of the invention is as follows:

according to one aspect of the invention, the anti-falling device for the attached lifting scaffold comprises a swinging piece, wherein a central hole is formed in the middle of a body structure of the swinging piece, and a return spring hole, a brake chuck, a shifting fork and a brake bottom bracket are respectively formed in the outer edge of the body structure of the swinging piece. The outer edge of the swinging piece body structure is oppositely arranged with the brake chuck and the brake bottom-drag swinging piece body structure; the brake chuck, the shifting fork and the brake bottom bracket are protruded outwards from the body structure of the swinging piece, and the return spring hole is used for being connected with a return spring.

When the return spring is in an initial state, the shifting fork is used for extending into a space between adjacent crosspieces of the scaffold guide rail, and the brake chuck is positioned at the upper part of the shifting fork and is not intersected with a connecting line of the crosspieces;

the brake chuck is configured to: when the shifting fork is shifted downwards by the crosspiece of the scaffold guide rail, the brake chuck extends into the space between the adjacent crosspieces of the scaffold guide rail and is used for blocking the crosspiece of the scaffold guide rail from moving downwards in a braking state;

in the braking state, the braking bottom bracket is used for being abutted against a braking baffle plate of a wall-attached support fixed on the building main body.

In the embodiment of the invention, the linear distance between the brake chuck and the central hole is a first distance, the linear distance between the shifting fork and the central hole is a second distance, and the first distance is greater than the second distance.

In an embodiment of the invention, the anti-falling device further comprises the return spring, one end of the return spring is connected with the return spring hole of the swinging piece, the other end of the return spring is connected with the wall-attached support, and the elastic coefficient and the length of the return spring are designed as follows:

the return spring is in the normal decline state of scaffold frame, the shift fork is stirred downwards by the crosspiece of scaffold frame guide rail and makes the braking dop stretch into between the adjacent crosspiece of scaffold frame guide rail after, return spring can pull back the swinging member for the braking dop is got back to and is located shift fork upper portion's position and not crossing with the line of crosspiece.

In the embodiment of the invention, the side edge of the brake chuck, which is used for blocking the crosspiece of the scaffold guide rail, is a straight edge, and the other side edge of the brake chuck is a smooth arc-shaped edge.

In the embodiment of the invention, two side edges of the shifting fork are smoothly transited arc edges.

In an embodiment of the invention, the structure of the brake bottom bracket for abutting against the brake baffle is a straight edge.

In an embodiment of the present invention, the swinging member has a plate-like configuration of a heteromorphic quadrilateral.

In an embodiment of the invention, the oscillating piece is made of wear-resistant steel.

In the embodiment of the invention, the inward-concave arc-shaped edges are respectively arranged between the brake chuck and the shifting fork and between the brake bottom bracket and the return spring hole.

According to another aspect of the invention, there is also disclosed a wall attachment stand comprising the fall arrest device, the wall attachment stand comprising: the support comprises a support body, a support body and a support frame, wherein one end of the support body is provided with an end part used for being connected with a building wall bolt, the other end of the support body is provided with a guide frame and a guide wheel used for being matched with a scaffold guide rail, the guide frame is provided with two symmetrical side edges, and the guide wheel is arranged on the side edge of the guide frame; the pin shaft is fixed in the middle of the support body, and a central hole of the swinging piece is arranged on the pin shaft; one end of the return spring is connected to the support body, and the other end of the return spring is connected to the return spring hole of the swinging piece; and a brake fence fixed to a lower end of the stand body, the brake fence having an end surface portion for stopping the brake bottom bracket of the swing member, the end surface portion being arranged to be inclined from bottom to top and to be close to the scaffold.

According to still another aspect of the present invention, an attached lifting scaffold is also disclosed, the attached lifting scaffold comprising the wall-attached support; wherein, the distance between the axis of the guide wheel and the central hole of the swinging piece is 79 +/-0.5 mm; the distance between two adjacent crosspieces of the scaffold guide rail is less than 100 mm.

In an embodiment of the invention, the crosspieces are rod-shaped pieces with a diameter of 25mm, and the distance between adjacent crosspieces is 80 mm.

According to the anti-falling device, the wall-attached support and the attached lifting scaffold, the beneficial effects at least comprising: the invention discloses a swinging piece with an innovative structure, which has the advantages of better anti-falling performance, relatively shorter braking distance, higher sensitivity and stable operation process.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. For purposes of illustrating and describing some portions of the present invention, corresponding parts of the drawings may be exaggerated, i.e., may be larger, relative to other components in an exemplary apparatus actually manufactured according to the present invention. In the drawings:

fig. 1 is a schematic plan view of a swinging member according to an embodiment of the present invention.

FIG. 2 is a schematic size diagram of a swinging member according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a fall protection device and a wall-attached support in an embodiment of the invention.

Fig. 4 is a schematic diagram illustrating a state change of the fall protection device during the ascending of the attached lifting scaffold according to an embodiment of the present invention.

Fig. 5 is a schematic diagram illustrating a state change of the fall protection device during the descending process of the attached lifting scaffold in one embodiment of the present invention.

Fig. 6 is a schematic diagram of the state change of the anti-falling device in the process of preventing falling of the attached lifting scaffold in one embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

It is also noted herein that the term "coupled," if not specifically stated, may refer herein to not only a direct connection, but also an indirect connection in which an intermediate is present.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.

The lifting motion of the attached lifting scaffold is realized by alternately lifting the movable frame and the fixed frame through the electric hoist. The movable frame and the fixed frame can move up and down relatively from the construction of the scaffold. When the scaffold works, the movable frame and the fixed frame are anchored with the wall body by the wall-attached support, and the two frames do not move relatively; when the scaffold needs to be lifted, one of the movable frame and the fixed frame is still anchored on the wall, the other frame is lifted by using the electric hoist, and relative motion is generated between the two frames. Attach the wall through adjustable shelf and mount in turn, go up and down each other, the scaffold frame can go up and down along the preformed hole successive layer on the wall body.

The invention provides a falling-preventing device, a wall-attached support and an attached lifting scaffold, which are used for solving or relieving the problems of poor falling-preventing performance, long braking distance and the like of the falling-preventing device in the traditional attached lifting scaffold.

In order to make up for the defects of the anti-falling device, the applicant of the invention summarizes through more than ten years of experience, field operation is carried out through more than half a year of practical research, the shape of the swinging piece of the swinging needle type anti-falling device is repeatedly changed, and various shapes are tested in sequence.

Fig. 1 is a schematic plan view of a swing of a fall arrest device according to an embodiment of the invention, as shown in fig. 1 and 3, in which the fall arrest device comprises a swing 100, the swing 100 being adapted to clamp a rung 4 of a scaffold rail to a wall attachment bracket 200 fixed to a building body.

The central hole 110 is formed in the middle of the body structure of the oscillating member 100 according to the embodiment of the present invention, so that the oscillating member 100 can be connected to the wall-attached support by a pin and can rotate around the pin. In addition, the outer edge of the body structure of the swing member 100 has a return spring hole 120, a brake chuck 130, a shift fork 140 and a brake bottom bracket 150 distributed along the braking rotation direction thereof. Wherein the brake cartridge 130, the yoke 140 and the brake drag 150 protrude outwardly from the body structure of the oscillating member. The return spring hole 120 is used to connect a return spring. The rotation braking direction is referred to herein as the direction in which the swinging member rotates to generate a braking effect on the scaffold, as in fig. 3, the rotation braking direction is clockwise or the swinging direction of the swinging member swings downward.

The swinging member 100 of the embodiment of the present invention may have a plate-like configuration of a deformed quadrangle, and more particularly, a plate-like configuration of a deformed parallelogram, in which the portions generating functions are mainly the center hole 110 thereof and the ends of the four corner positions thereof. The return spring hole 120 and the shifting fork 140 are oppositely arranged on the outer edge of the swinging member body structure, so that the swinging member is ensured not to generate a braking effect on the swinging member in a normal lifting state of the scaffold, and the stable operation is realized. The brake calliper 130 and brake drag 150 are also oppositely disposed on the outer edge of the pendulum body structure, these two ends primarily serving to: when the scaffold falls down suddenly, the scaffold is braked. The relative arrangement described herein refers to a substantially diagonal arrangement of the pendulum members rather than adjacent the pendulum members.

Wherein the return spring hole 110 is used to connect a return spring so that the oscillating piece 100 can rotate back to the initial position along the central hole 110 under the pull of the return spring. When the swing member 100 according to the embodiment of the present invention is at the initial position, the attached lifting scaffold can perform a normal ascending or descending motion, i.e., a low speed motion. In other words, in the initial state of the return spring 110, the fork 140 is adapted to extend between adjacent rungs of the scaffold rail, and the brake caliper 130 is located at an upper portion of the fork 140 and does not intersect a line connecting the adjacent rungs.

The structure of the stopper clamp 130 of the embodiment of the present invention on the swinging member 100 is set such that: in the state in which the fork 140 is shifted downward by the ledge 4 of the scaffold rail, the brake clip 130 is inserted between the adjacent ledges of the scaffold rail to block the ledge 4 of the scaffold rail from moving downward in the braking state.

In the anti-falling device of the embodiment of the invention, in the braking state, the braking bottom support 150 is used for being abutted against the braking baffle 5 fixed on the wall-attached support of the building main body.

The invention discloses a falling-preventing device, and discloses a swinging piece with an innovative structure, which has the advantages of better falling-preventing performance, higher sensitivity and stable operation process.

The fall arrest device of embodiments of the present invention may further comprise a return spring 3. Wherein, one end of the return spring 3 is connected with the return spring hole 120 of the swinging piece 100, and the other end is connected with the wall-attached support.

The spring constant and length of the return spring 3 are designed such that: in the normal descending state of the scaffold, the return spring 3 can pull back the swinging member after the shifting fork 140 is shifted downwards by the crosspiece 4 of the scaffold rail so that the brake chuck 130 extends into the space between the adjacent crosspieces 4 of the scaffold rail, so that the brake chuck 130 returns to the position at the upper part of the shifting fork 140 and does not intersect with the connecting line of the crosspiece 4. This position can also be seen as the position of the pendulum with the return spring 3 in the initial state.

In the embodiment of the present invention, the linear distance of the swing member's brake caliper 130 from the central hole 110 is a first distance, and the linear distance of the fork 140 from the central hole 110 is a second distance, and the first distance is greater than the second distance, so that the brake caliper 130 reliably blocks the rung 4 of the scaffold rail.

In the embodiment of the present invention, it is,

the side of the locking clip 130 that is used to block the crosspiece 4 of the scaffold rail is a flat edge 131, which can more stably abut against the crosspiece 4 of the scaffold rail and prevent it from falling. The other side of the brake clip 130 is a smooth arc edge which can be used for being knocked by the crosspiece 4 in the scaffold lifting state.

Both sides of the fork 140 may be smoothly transitioned arc edges 141; for swinging the swinging member 100 under the collision of the crosspieces 4 when the scaffold is moving. The crosspiece 4 of the embodiment of the invention can be a circular tube structure extending out of the scaffold guide rail, and the arc-shaped edge 141 can be smoothly stirred and rotated along with the movement of the scaffold.

In this embodiment, the drag shoe 150 is located at the end of the pendulum 100 body structure remote from the drag head 130, and the structure of the drag shoe 150 for abutting the drag stop 5 is a flat edge 151. Furthermore, as shown in fig. 3, the catch bottom bracket 150 and the catch flap 5 can be designed with inclined end faces, so that the flat edge 151 and the catch flap 5 have a larger contact area or length to block the rotation of the pendulum 100, thus performing the fall protection function.

In the case of the swing member 100 of the present embodiment, in order to make the swing process thereof more stable and also to increase the sensitivity during the shifting of each of the protruding end portions and the crosspiece 4, the edge between the brake caliper 130 and the fork 140 and the edge between the brake shoe 150 and the return spring hole 120 are all inwardly recessed arc-shaped edges. In addition, the edge between the fork 140 and the drag 150 may consist of a smoothly transitioning curved edge and a straight edge. Between the return spring hole 120 and the brake caliper 130 may be the edge of a straight section.

Further, when the swinging member 100 of the present embodiment is viewed as being substantially in a parallelogram configuration, in order to further describe the shape and configuration thereof, the return spring hole 120 and the fork 140 of the swinging member 100 of the present embodiment are disposed substantially diagonally, and the brake cartridge 130 and the brake shoe 150 are disposed substantially diagonally, corresponding to the structure of the swinging member shown in fig. 1. A flat upper edge can be seen between the return spring aperture 120 and the brake caliper 130 and a generally flat lower edge can be seen between the fork 140 and the brake shoe 150. It will be understood that the above and below relationships are only for the sake of reference and are not intended to limit the structure of the fall arrest device and the oscillating member of the present invention.

The end of the brake chuck 130 can be viewed as having a less rounded configuration and the end of the fork 140 can be viewed as having a more rounded configuration. The brake shoe 150 may transition from the lower edge at an acute angle, and the brake shoe 150 may transition from the left edge at an obtuse angle. The design of the structure increases the thickness of the part mainly bearing the acting force, is beneficial to the transmission of the acting force during the anti-falling braking, and ensures the stability of the anti-falling device.

Fig. 4 shows a state change process of the swinging member of the present embodiment during the ascent of the attached lifting scaffold, fig. 5 shows a state change process of the swinging member of the present embodiment during the descent of the attached lifting scaffold, and fig. 6 shows a state change process of the swinging member of the present embodiment during the fall prevention of the attached lifting scaffold.

The principle and operation of the fall arrest device and the oscillating member of the present embodiment will be described in detail with reference to fig. 4 to 6. The fall protection device is in an initial position when not in use or when the scaffold is not in motion, and the return spring 3 is also in an initial state. The initial position of the swing member 100 may be vertical, i.e., the brake shoe 150 of this embodiment is facing down, the brake clip 130 is facing down, the head of the fork 140 is located between the rails 4 of the scaffold rail, or the striking portion 141 of the fork 140 side is in contact with one of the rails 4. In other words, fork 140 intersects the line of rail 4, and brake caliper 130 does not intersect the line of rail 4

As shown in fig. 4, when the scaffold is in the raised state, the lower side edge of the shift fork 140 is shifted by the upper circumferential surface of the ledge 4 to rotate counterclockwise (as shown in fig. 4 a), and after the swing member 100 rotates to the extreme position (as shown in fig. 4b, the brake bottom bracket 150 does not go over the ledge 4 in general), the swing member 100 is pulled back to the initial position by the return spring. Since the swinging member has a certain rotational inertia, the stopper 130 of the swinging member collides with one side of the crosspiece 4 or enters between the adjacent crosspieces 4 (as shown in fig. 4 c), and then the swinging member repeats the action and the state change when the swinging member ascends, so that the swinging member of the embodiment does not generate the locking or braking locking to the ascending process of the scaffold.

As shown in fig. 5, when the scaffold is in a normal descending state, the moving speed is low, the upper side edge of the shift fork 140 is shifted by the lower circumferential surface of the crosspiece 4 to rotate clockwise (as shown in fig. 5 a), and after the swinging member 100 rotates to the extreme position (as shown in fig. 5b, the general brake chuck 130 enters between the adjacent crosspiece 4), the swinging member 100 is pulled back to the initial position by the return spring. Due to the fact that the scaffold normally falls at a low speed, the brake chuck 130 of the swinging member has enough time to return to the initial position (as shown in fig. 5 c), and then the swinging member repeats the action and state change during normal falling, the swinging member of the embodiment cannot generate dead locking or brake locking on the scaffold during normal falling.

As shown in fig. 6, when the scaffold suddenly falls in an unexpected situation, due to a high scaffold falling speed, the locking clip 130 of the swinging member does not have enough time to return to the initial position (as shown in fig. 6 b), the locking clip 130 of the swinging member locks the crosspiece 4 of the guide rail (as shown in fig. 6 c), and the locking bottom bracket 150 abuts against the locking bottom plate, so that the locking is realized.

In order to further meet the requirements of continuity and return of the swinging motion of the swinging member in different states of ascending, descending and falling of the attached lifting scaffold, the present embodiment has a certain design for the distances of the three ends of the swinging member, the stopper jaw 130, the fork 140 and the stopper bottom bracket 150, with respect to the central hole 110.

For example, the linear distance from the brake chuck 130 to the central hole 110 is a first distance, the linear distance from the fork 140 to the central hole 110 is a second distance, and the first distance is greater than the second distance, so that the scaffolding is not easily locked in the ascending state, and is more reliable and stable in braking. In other embodiments, the linear distance between the brake shoe 150 and the central hole 110 is a third distance, and the third distance is greater than the second distance, so that the scaffold is not easily locked in a normal descending state, and is more reliable and stable in braking.

The thickness of the swinging piece of the embodiment can be the same as that of the existing swinging piece, so that the swinging piece can be installed on a conventional wall-attached support, and the thickness of the swinging piece can be increased appropriately according to design requirements.

In addition, the swinging piece of the traditional falling protector is mostly made of Q235 common carbon structural steel, but the material is not hard enough and easy to deform, so that the braking distance can be increased, and safety accidents can easily occur in the process of multiple use. The swing piece of this embodiment replaces the material of wear-resisting steel after experimental many times, like NM360, can realize that braking distance is little, indeformable and the stable effect of braking distance.

When the swinging member of the embodiment adopts the material of the NM360 wear-resistant steel, the process performance test is carried out on the NM360 wear-resistant steel plate with the thickness of 30mm, and the result is shown in the table I.

Table one: mechanical Properties of test Steel sheet

Mechanical Properties	Tensile Strength Rm (MPa)	Elongation (%)	Impact (20 deg.C) (AKV/J)	Brinell Hardness (HB)
					Factory inspection	990	17.2	102	350-410

Description of the drawings: the hardness value is about HB410 measured on the surface of the steel plate, and about HB350 measured at the central part of the steel plate in the thickness direction.

In order to machine the oscillating piece and the center hole of the present embodiment on NM360 wear-resistant steel, a diamond bit may be used. The swinging piece of this embodiment adopts NM360 wear-resisting steel material, and the material is harder, and mechanical properties is good, uses repeatedly difficult deformation, wearing and tearing are little, further increases its security.

In another embodiment, a wall-attached support is also provided, the wall-attached support 200 of the present invention can be provided with the anti-falling device, and the wall-attached support 200 further comprises components associated with the swinging member 100, such as a pin 1, a return spring 3, and a braking baffle 5. Attach wall support 200's support body one end have be used for with building wall bolted connection's tip 210, the other end have be used for with scaffold guide rail complex leading truck and leading wheel 220, the leading truck has the side of two symmetries, the leading wheel is installed on the side of leading truck.

The guide frame and guide wheels 220 of the wall attachment bracket 200 of the embodiment of the present invention are used to match the scaffold rail and enable the scaffold rail to move therealong. The pin shaft 1 of the present embodiment is fixed in the middle of the support body, and the central hole 110 of the swinging member is installed on the pin shaft 1, so that the swinging member 100 and the wall-attached support 200 form a hinge connection, and the swinging member 100 can rotate relatively. One end of the return spring 3 is connected to the support body through the suspension loop 2, and the other end is connected to the return spring hole 110 of the oscillating member 100. The return spring 3 is disposed on a side of the swing member 100 away from the scaffolding, and is mainly used to apply a pulling force to the swing member 100 and pull the swing member 100 back to the initial position after it rotates. A brake fence 5 is fixed to the lower end of the stand body, and the brake fence 5 has an end surface portion for stopping the brake bottom bracket 150 of the swinging member, which is arranged to be inclined from bottom to top and close to the scaffold, as shown in fig. 3.

One or more than one guide wheel 220 can be arranged on the two sides of the wall-attached support 200 in the embodiment. In one embodiment, as shown in fig. 3, the guide wheels 220 on each side of the wall-attached support 200 are disposed two above each other, wherein the distance from the axis of one guide wheel 220 to the central hole 100 of the swinging member 100 is 79 ± 0.5 mm.

In some embodiments, the wall-attached support and the anti-falling device can be applied to tool type scaffolds of the national code JGJ202 construction tool type scaffold safety technical code. The specification requires that the braking time of the integral lifting scaffold is less than or equal to 0.2 second and the braking distance is less than or equal to 80 mm.

In the prior art, a main frame and a guide rail are connected together by a phi 16 screw, and the back-to-back middle of the guide rail is provided with a crosspiece made of round steel welded by phi 25 round steel Q345; a braking bottom plate, a central pin shaft of the anti-falling device and a return spring fixing ring are welded on the wall-attached support; one end of the attached lifting scaffold is fixed on a shear wall of the building main body, and the other end of the attached lifting scaffold is fixed on the main frame, and the main frame is tightened or loosened through the electric hoist to realize the lifting motion of the main frame.

The problems of long braking distance, easy deformation, low process precision and poor safety of most of anti-falling devices in the industry in the prior art exist, the braking distance is 120mm to 200mm, the national standard is not met, and the accident rate of attaching lifting scaffolds in recent years is frequent.

In another embodiment, there is also provided an attached lifting scaffold comprising the above-mentioned wall-attached support 200, wherein the distance from the axis of the guide wheel to the central hole of the swinging member is 79 ± 0.5 mm; the distance between the adjacent crosspieces of the guide rails is less than 100 mm. Preferably, the crosspieces are round steel bars with a diameter of 25mm, and the distance between adjacent crosspieces is 80 mm.

The guide rail of the attached lifting scaffold in the embodiment can adopt the guide rail of the national specification JGJ 202. In the crosspiece of the traditional guide rail, the distance of the crosspiece is 200mm, 150mm and 125mm, and the braking distance which is too wide and cannot meet the standard requirement completely is less than or equal to 80mm by matching with the anti-falling device.

Practice and research show that the distance between the crosspieces of the guide rails is less than 100mm, and the standard distance of the braking distance is less than or equal to 80 mm. As shown in fig. 2, in this embodiment, the length L of the oscillating piece of the fall arrest device is 176mm, the width W is 92mm, the radius R1 of the arc segment of the brake caliper is 95mm, the radius R2 of the arc segment between the brake caliper and the yoke is 39mm, the radius R3 of the arc segment between the yoke and the brake shoe is 50mm, and the radius R4 of the arc segment between the brake shoe and the return spring hole is 120 mm. In the embodiment, the crosspiece of the scaffold guide rail can be 100mm, the diameter of the crosspiece is phi 30mm, and multiple times of verification prove that the standard distance of the braking distance less than or equal to 80mm can be reliably realized.

In other embodiments. In order to reduce the falling prevention distance, the designed crosspiece distance of 80mm is tested, round steel with the diameter of 30mm and the material of Q345 is used for testing the ladder crosspiece, the expected effect that the braking distance is less than or equal to 80mm can be achieved, the technical requirement is fine, the site conditions of a construction site are poor, dust is large, and the ladder crosspiece is easy to clamp and mix in the using process.

In order to further increase the practicability and smooth operation of the anti-falling device on the attached lifting scaffold, the crosspiece distance is set to be 80mm, the crosspiece is replaced by round steel with the diameter of 25mm and the material of Q345, the size of the swinging piece of the embodiment is reduced in an equal proportion to match the crosspiece distance, the experiment is repeated on the experiment platform, the precision of the braking distance which is less than or equal to 50mm is obtained, and the braking time completely reaches the national standard. Other rod-shaped pieces, such as other alloy pipe pieces, can also be adopted as the crosspiece.

Although the diameter of the crosspiece is properly reduced in the embodiment, the mechanical strength of the crosspiece completely meets the national standard, and the problem of insufficient strength does not occur in the actual use process.

In the actual use process, the phenomenon of jamming and stirring cannot occur, and the practicability is good. The attached lifting scaffold of this embodiment has reduced the processing degree of difficulty, improves building site construction's factor of safety.

According to the anti-falling device, the wall-attached support and the attached lifting scaffold, the beneficial effects at least comprising:

1) the invention provides a falling-preventing device, discloses a swinging piece with an innovative structure, and has the advantages of better falling-preventing performance, relatively shorter braking distance, higher sensitivity, stable running process and reliable braking.

2) The swinging piece can be made of NM360 wear-resistant steel, is hard in material, good in mechanical property, not easy to deform after being repeatedly used, small in wear and further capable of improving the safety.

3) The wall-attached support is provided with the pin shaft, the return spring, the braking baffle plate and the like which are associated with the swinging piece, provides a firm foundation for the anti-falling device, and transmits the braking force of the anti-falling device to the building wall.

4) The attached lifting scaffold in the embodiment uses the swinging piece with an innovative structure, and can realize the braking distance required by national regulations; the attached lifting scaffold in the embodiment properly reduces the diameter of the crosspiece of the guide rail, increases the smoothness of the anti-falling device in the swinging process, and increases the braking sensitivity.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The anti-falling device for the attached lifting scaffold is characterized by comprising a swinging piece, wherein the middle part of a body structure of the swinging piece is provided with a central hole, and the outer edge of the body structure of the swinging piece is respectively provided with a return spring hole, a brake chuck, a shifting fork and a brake bottom support;

the brake device comprises a swinging piece body structure, a return spring hole, a brake chuck, a brake bottom and a shift fork, wherein the return spring hole and the shift fork are oppositely arranged on the outer edge of the swinging piece body structure;

the brake chuck, the shifting fork and the brake bottom bracket protrude outwards from the body structure of the swinging piece, and the return spring hole is used for connecting a return spring;

2. The device of claim 1 wherein the brake grip is a first distance from the central bore and the yoke is a second distance from the central bore, the first distance being greater than the second distance.

3. The device of claim 2 further comprising the return spring having one end connected to the return spring aperture of the oscillating member and the other end connected to the wall attachment support, the spring rate and length being such that:

4. The device of claim 1,

the side edge of the brake chuck, which is used for blocking the crosspiece of the scaffold guide rail, is a straight edge, and the other side edge is a smooth arc-shaped edge;

two side edges of the shifting fork are smoothly transited arc edges;

the structure that the braking bottom drag is used for abutting against the braking baffle is a straight edge.

5. The device of claim 1 wherein the oscillating member is of a contoured quadrilateral plate-like configuration.

6. The device of claim 1 wherein the oscillating member is of wear resistant steel.

7. The device of claim 1 wherein the brake block and fork are each formed with inwardly concave arcuate edges between the brake shoe and the return spring aperture.

8. A wall attachment bracket comprising the fall arrest device of any one of claims 1 to 7, the wall attachment bracket comprising:

the support comprises a support body, a support body and a support frame, wherein one end of the support body is provided with an end part used for being connected with a building wall bolt, the other end of the support body is provided with a guide frame and a guide wheel used for being matched with a scaffold guide rail, the guide frame is provided with two symmetrical side edges, and the guide wheel is arranged on the side edge of the guide frame;

the pin shaft is fixed in the middle of the support body, and a central hole of the swinging piece is arranged on the pin shaft;

one end of the return spring is connected to the support body, and the other end of the return spring is connected to the return spring hole of the swinging piece;

and a brake fence fixed to a lower end of the stand body, the brake fence having an end surface portion for stopping the brake bottom bracket of the swing member, the end surface portion being arranged to be inclined from bottom to top and to be close to the scaffold.

9. A scaffolding system, comprising the wall attachment support of claim 8;

wherein, the distance between the axis of the guide wheel and the central hole of the swinging piece is 79 +/-0.5 mm;

the distance between two adjacent crosspieces of the scaffold guide rail is less than 100 mm.

10. An attached lifting scaffold according to claim 9, wherein the rungs are rod-like members of 25mm diameter and the adjacent rungs are spaced apart by 80 mm.