CN212336678U

CN212336678U - Anti-falling connecting device for scaffold

Info

Publication number: CN212336678U
Application number: CN202020428669.1U
Authority: CN
Inventors: 陈立剑
Original assignee: Guangdong Jiqian Construction Engineering Co ltd
Current assignee: Guangdong Jiqian Construction Engineering Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2021-01-12
Anticipated expiration: 2030-03-27

Abstract

A fall arrest connection for a scaffold comprising: the lifting column is arranged along the vertical direction, and anti-falling teeth are arranged on the lifting column; the wall-attached base comprises a connecting plate and a connecting seat, a first cavity is arranged in the connecting seat, and a first sliding hole is formed in the first cavity; the anti-falling mechanism comprises a sliding rod, a first connecting rod, a spring, a sliding seat and an anti-falling rod, the sliding rod is hinged with the first connecting rod, a second sliding hole is formed in the sliding seat, the anti-falling rod slides along the second sliding hole, an anti-falling bayonet is formed in the anti-falling rod, and the anti-falling rod is hinged with the first connecting rod; the sliding rod is provided with a first limiting block, and the spring is positioned on the first limiting block to drive the first limiting block to move towards the bottom wall of the first cavity; the lower part of the sliding rod extends out of the first cavity and is provided with a sliding cavity; the driving mechanism comprises a support, a lever and a connecting piece, the connecting piece is connected with the sliding rod in a sliding mode through the lever, and the support supports the lever. Through the arrangement, the elastic force of the spring is reduced to block the lifting of the scaffold, and the safety is improved.

Description

Anti-falling connecting device for scaffold

Technical Field

The utility model relates to a construction equipment technical field, in particular to a connecting device that prevents falling for scaffold.

Background

The scaffold is a physical platform which is erected for ensuring each construction process to be carried out smoothly, and is used for carrying people and goods at high altitude. In the prior art, the anti-falling connecting device of the attached lifting scaffold commonly used in the market needs to rely on spring force as the driving force for locking, and related safety measures are lacked when the spring force is reduced, so that the safety is limited.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a prevent connecting device that falls for scaffold frame, the security is higher.

The utility model provides a prevent connecting device that falls for scaffold, include:

the lifting column is arranged along the vertical direction, and anti-falling teeth are arranged on the lifting column;

the wall-attached base comprises a connecting plate and a connecting seat which are connected together, a vertically arranged lifting guide rail is arranged on one side of the connecting seat away from the connecting plate, the lifting column slides along the lifting guide rail, a first cavity is arranged in the connecting seat, and a vertically through first sliding hole is formed in the first cavity;

the anti-falling mechanism comprises a sliding rod, a first connecting rod, a spring, a sliding seat and an anti-falling rod, the sliding rod is connected with a first sliding hole in a sliding mode, the upper portion of the sliding rod penetrates through the first sliding hole and is hinged to the first connecting rod, the sliding seat is arranged on the top surface of the connecting seat, a second sliding hole which is transversely communicated is formed in the sliding seat, the anti-falling rod slides along the second sliding hole, an anti-falling bayonet is arranged at the end portion, close to the lifting column, of the anti-falling rod, and the other end portion of the anti-falling rod extends to one side, far away from the lifting column, of the sliding rod and is hinged to the first connecting rod; the sliding rod is provided with a first limiting block in the first cavity, the spring is positioned between the first limiting block and the top wall of the first cavity and drives the first limiting block to move towards the bottom wall of the first cavity, so that the anti-falling bayonet is clamped with the anti-falling teeth; the lower part of the sliding rod extends out of the first cavity and is provided with a sliding cavity extending along the left-right direction;

the driving mechanism comprises a support, a lever and a connecting piece, the support is fixedly connected to the bottom surface of the connecting seat, a first hinge portion is arranged on the support, one end portion of the lever and the sliding rod are slidably hinged in the sliding cavity, the middle portion of the lever is hinged to the first hinge portion, the other end portion of the lever is hinged to the connecting piece, and the distance from the first hinge portion to the sliding cavity is smaller than the distance from the first hinge portion to the hinge point of the lever and the connecting piece.

In the process that the sliding rod moves from bottom to top, the sliding rod drives the anti-falling rod to slide along the second sliding hole through the first connecting rod, and the anti-falling rod firstly moves away from the anti-falling teeth and then moves close to the anti-falling teeth.

The utility model provides a pair of a connecting device that falls for scaffold frame has following beneficial effect at least: when the wall-attached type building is used, the wall-attached base is fixed with an external wall of a building through bolts, an external scaffold is fixed with the lifting column, and an external electric hoist is arranged on the scaffold; in a lifting state, a ring chain on the electric hoist is connected with an external steel wire rope, the steel wire rope crosses a scaffold below the electric hoist and then is connected with a connecting piece, a downward pulling force is provided for the connecting piece, the pulling force is amplified through a lever to drive a sliding rod to overcome the elastic force of a spring to move upwards for a certain distance, a first connecting rod is driven to rotate upwards, and a falling prevention rod is driven to be separated from falling prevention teeth, so that the scaffold can be lifted smoothly; when the elasticity of the spring descends, the upward movement distance of the spring is increased, the sliding rod continues to move upwards, the first connecting rod drives the falling prevention rod to move towards the falling prevention teeth and is clamped on the falling prevention teeth to block the lifting column from continuing to move, and therefore the lifting column can be prevented from continuing to move when the elasticity of the spring descends, and safety is improved.

In addition, the pulling force that the connecting piece received is enlargied to the adoption utilizes the lever, and its simple structure easily realizes, and it is comparatively convenient when needing the power increase multiple of adjustment lever.

As a sub-solution of the above technical solution, the connecting member includes a connecting portion and a second hinge portion, and the connecting portion is a ring-shaped structure. The connecting part with the annular structure is more convenient to be connected with external lifting devices such as an electric hoist and the like.

As a sub-solution of the above technical solution, the outer diameter of the connecting member gradually increases as the connecting member extends from the second hinge portion to the connecting portion. Thereby, the overall strength of the connection is higher.

As a plurality of sub-schemes of the technical scheme, the anti-falling teeth are cylinders, the bayonets are arc-shaped, and the opening size of the bayonets is smaller than the diameter of the cylinders. Therefore, the strength of the anti-falling teeth is higher, and the bayonets are more easily clamped with or separated from the anti-falling teeth.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an embodiment of the present invention in an un-lifted state;

fig. 2 is a schematic diagram of the mechanism in a lifting state according to the embodiment of the present invention;

fig. 3 is a schematic view of the mechanism when the spring force is decreased in the lifted state according to the embodiment of the present invention.

In the drawings:

110-a connecting plate; 120-a connecting seat; 121-a first cavity; 122-a second slide hole;

200-lifting columns; 210-anti-falling teeth;

310-a sliding bar; 311-a first stopper; 312-a sliding cavity; 320-a first link; 330-anti-falling rod; 340-a spring;

410-a connector; 411-a connecting part; 420-support; 430-a lever; 421-a first hinge.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of terms means an indefinite amount, and a plurality of terms means two or more, and the terms greater than, less than, exceeding, etc. are understood to include no essential numbers, and the terms greater than, less than, within, etc. are understood to include essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. Additionally, appearing throughout and/or representing three juxtapositions, e.g., A and/or B represents an A disposition, a B disposition, or both A and B satisfied disposition.

In the description of the present invention, if there is a phrase containing a plurality of parallel features, the phrase defined therein is the closest feature, for example: b, C disposed on A, E connected to D, which indicates that B is disposed on A and E is connected to D, and C is not limited; however, terms indicating relationships between features such as "spaced apart", "arranged in a ring", etc. do not fall within this category. The phrase preceded by the word "mean" indicates that it is a definition of all features in the phrase, and if B, C, D is set on a, it indicates that B, C and D are set on a.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, the present embodiment relates to a fall prevention connection device for a scaffold, which includes a lifting column 200, a wall-attached base, a fall prevention mechanism, and a driving mechanism.

The lifting column 200 is arranged along the vertical direction, and a plurality of anti-falling teeth 210 are uniformly distributed on the lifting column 200 along the vertical direction; the anti-falling teeth 210 are cylindrical bodies, and the anti-falling teeth 210 are fixed on the lifting column 200 in a welding mode.

The wall-attached base is located on the right side of the lifting column 200, the wall-attached base comprises a connecting plate 110 and a connecting seat 120 which are connected together, the connecting plate 110 is used for being connected with an external building wall, a plurality of through holes (not shown in the figure) for being connected with the wall through bolts are formed in the connecting plate 110, a vertically arranged lifting guide rail is arranged on the left side of the connecting seat 120, the lifting column 200 slides up and down along the lifting guide rail, a first cavity 121 is formed in the connecting seat 120, in the embodiment, the first cavity 121 penetrates through the groove body vertically along the front-back direction to form a hole structure, in other embodiments, the first cavity 121 can be formed in other manners, for example, the first cavity 121 is formed by closing the opening of the groove body through an end cover, and a vertically penetrating first sliding hole is formed in the;

prevent weighing down the mechanism and include slide bar 310, first connecting rod 320, spring 340, sliding seat and prevent weighing down pole 330, slide bar 310 and first slide opening sliding connection, wear out on the upper portion of slide bar 310 first slide opening is articulated with first connecting rod 320, the sliding seat rigid coupling is in the top surface of connecting seat 120, be equipped with the second slide opening 122 that transversely link up on the sliding seat, prevent weighing down pole 330 along second slide opening 122 slides, prevent weighing down pole 330 and be close to the tip of lift post 200 is provided with prevents weighing down the bayonet socket, the bayonet socket is arc, and the opening size of bayonet socket is less than the diameter of cylinder.

The other end of the anti-falling rod 330 extends to the right side of the sliding rod 310 and is hinged with the first link 320; the first connecting rod 320 extends out obliquely from the upper right, the sliding rod 310 is provided with a first limiting block 311 in the first cavity 121, and the spring 340 is located between the first limiting block 311 and the top wall of the first cavity 121 and drives the first limiting block 311 to move towards the bottom wall of the first cavity 121, so that the anti-falling bayonet is clamped with the anti-falling teeth 210; the lower part of the sliding rod 310 extends out of the first cavity 121 and is provided with a sliding cavity 312 extending along the left-right direction;

the driving mechanism comprises a support 420, a lever 430 and a connecting piece 410, the support 420 is fixedly connected to the bottom surface of the connecting seat 120, a first hinge portion 421 is arranged on the support 420, the left end portion of the lever 430 and the sliding rod 310 are slidably hinged in the sliding cavity 312, specifically, a connecting rod extending out of the cavity wall of the sliding cavity 312 along the front-back direction can be arranged in the sliding cavity 312, and the left end portion of the lever 430 is hinged with the connecting rod to realize slidable hinge; the middle portion of the lever 430 is hinged to the first hinge portion 421, and the right end portion of the lever 430 is hinged to the link 410. the distance from the first hinge portion 421 to the sliding chamber 312 is smaller than the distance from the first hinge portion 421 to the hinge point of the lever 430 and the link 410, so as to amplify the force of the link 410 for moving the sliding bar 310 upward against the force of the spring 340. The connecting member 410 includes a connecting portion 411 and a second hinge portion, and the connecting portion 411 has a ring structure. The connecting portion 411 having a ring structure is more convenient to connect with an external lifting device such as an electric hoist.

When the wall-attached base is used, the wall-attached base is fixed with an external wall of a building through bolts, an external scaffold is fixed with the lifting column 200, and an external electric hoist is arranged on the scaffold; furthermore, the middle part of the lever 430 is also provided with a plurality of hinge holes; the pulling force applied to the connecting member 410 is amplified to the sliding rod 310 by the lever 430, so that when the amplification factor of the lever 430 needs to be changed, the lever 430 only needs to be adjusted to be hinged to the support 420 by using different hinge holes, and the specific connection manner of the hinge connection can be that a pin shaft is welded on the support 420, and a screw hole is arranged on the end surface of the pin shaft, the pin shaft penetrates through the hinge hole and the lever 430 is limited on the pin shaft by a screw.

In a non-lifting state, referring to fig. 1, the spring 340 keeps the sliding rod 310 at the lower end of the stroke, at this time, the first connecting rod 320 extends obliquely and upwards to the right, and the anti-falling rod 330 and the anti-falling teeth 210 are kept in a clamping state, and it can be understood that the elastic force of the spring 340 needs to be preset to be enough to bear the weight of the whole peripheral scaffold and constructors;

in a lifting state, referring to fig. 2, a loop chain on the electric hoist is connected with an external steel wire rope, the steel wire rope crosses a scaffold below the electric hoist and then is connected with a connecting piece 410, and specifically can be hooked in a connecting part 411 to form a movable pulley type lifting structure; in the state, the electric hoist can retract the ring chain to lift the scaffold;

when the electric hoist retracts the ring chain, the connecting piece 410 is pulled downwards, the lever 430 is amplified to drive the sliding rod 310 to move upwards for a certain distance by overcoming the elastic force of the spring 340, the first connecting rod 320 is driven to rotate upwards, the anti-falling rod 330 is driven to be separated from the anti-falling teeth 210, and the amplification degree of the pulling force can be changed by adjusting the hinged position of the first hinge part 421 and the lever 430, so that the anti-falling rod 330 can be separated from the anti-falling teeth 210 in the lifting state.

Referring to fig. 3, when the elastic force of the spring 340 is decreased, the upward movement distance of the spring 340 is increased, the sliding rod 310 continues to move upward, the first link 320 drives the fall prevention rod 330 to move toward the fall prevention teeth 210 and to be clamped on the fall prevention teeth 210, so as to block the lifting column 200 from continuing to move, and therefore, the lifting column 200 can be prevented from continuing to move when the elastic force of the spring 340 is decreased, and the safety is improved.

Further, under the condition shown in fig. 1, a gap is further provided between the first stopper 311 and the bottom wall of the connection cavity. If the elasticity of the spring 340 is reduced in a non-lifting state, after the falling prevention rod 330 is separated from the falling prevention teeth 210, the sliding rod 310 can continue to extend downwards under the action of the spring 340, so that the falling prevention rod 330 can extend to the left of the falling prevention teeth 210, and braking is realized by the fact that the falling prevention rod 330 is abutted against the bottom surfaces of the falling prevention teeth 210. In which the constructor should leave the scaffolding as soon as possible and transfer to a safe position.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments, but is capable of various changes and modifications without departing from the spirit of the invention.

Claims

1. A prevent connecting device that falls for scaffold which characterized in that: the method comprises the following steps:

the lifting column (200) is arranged along the vertical direction, and anti-falling teeth (210) are arranged on the lifting column (200);

the wall-attached base comprises a connecting plate (110) and a connecting seat (120) which are connected together, a vertically arranged lifting guide rail is arranged on one side, away from the connecting plate (110), of the connecting seat (120), the lifting column (200) slides along the lifting guide rail, a first cavity (121) is arranged in the connecting seat (120), and a first vertically through sliding hole is formed in the first cavity (121);

the anti-falling mechanism comprises a sliding rod (310), a first connecting rod (320), a spring (340), a sliding seat and an anti-falling rod (330), wherein the sliding rod (310) is connected with a first sliding hole in a sliding mode, the upper portion of the sliding rod (310) penetrates out of the first sliding hole and is hinged to the first connecting rod (320), the sliding seat is arranged on the top surface of the connecting seat (120), a second sliding hole (122) which is transversely penetrated is formed in the sliding seat, the anti-falling rod (330) slides along the second sliding hole (122), an anti-falling bayonet is arranged at the end portion, close to the lifting column (200), of the anti-falling rod (330), and the other end portion of the anti-falling rod (330) extends to one side, far away from the lifting column (200), of the sliding rod (310) and is hinged to the first connecting rod (320); the sliding rod (310) is provided with a first limiting block (311) in the first cavity (121), the bullet (340) is positioned between the first limiting block (311) and the top wall of the first cavity (121) and drives the first limiting block (311) to move towards the bottom wall of the first cavity (121), so that the anti-falling bayonet is clamped with the anti-falling teeth (210); the lower part of the sliding rod (310) extends out of the first cavity (121) and is provided with a sliding cavity (312) extending along the left-right direction;

the driving mechanism comprises a support (420), a lever (430) and a connecting piece (410), the support (420) is fixedly connected to the bottom surface of the connecting seat (120), a first hinge portion (421) is arranged on the support (420), one end portion of the lever (430) and the sliding rod (310) are slidably hinged in the sliding cavity (312), the middle portion of the lever is hinged to the first hinge portion (421), the other end portion of the lever is hinged to the connecting piece (410), and the distance from the first hinge portion (421) to the sliding cavity (312) is smaller than the distance from the first hinge portion (421) to the hinge point of the lever (430) and the connecting piece (410).

2. A fall arrest connection according to claim 1, for a scaffold, wherein: the connecting piece (410) comprises a connecting part (411) and a second hinge part, wherein the connecting part (411) is of a ring-shaped structure.

3. A fall arrest connection according to claim 2, for a scaffold, wherein: the outer diameter of the connecting piece (410) is gradually increased in the process of extending from the second hinge part to the connecting part (411).

4. A fall arrest connection according to claim 1, for a scaffold, wherein: the anti-falling teeth (210) are cylinders, the bayonets are arc-shaped, and the opening sizes of the bayonets are smaller than the diameters of the cylinders.