Scaffold steel pipe fastener

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a scaffold steel pipe fastener which comprises a fastener fixed part, the fastener fixed part is rotationally connected with a fastener movable part through a self-locking pin shaft assembly, a bolt is inserted in the fastener fixed part and is in threaded connection with a nut, and the self-locking pin shaft assembly comprises a first connecting piece and a second connecting piece. The first connecting piece is inserted into the fastener movable part, the second connecting piece comprises an outer sleeve and a rotating piece, the outer sleeve is fixedly arranged on the fastener fixed part, the rotating piece is integrally formed by an elastic pawl and a connecting rod, the elastic pawl is in one-way clamping connection with a ratchet groove, the ratchet groove is formed in the inner wall of the outer sleeve, and the connecting rod is inserted into the first connecting piece in a sliding mode. When the bolt structure of the fastener fixed part and the fastener movable part is loosened, a one-way ratchet wheel structure composed of the outer sleeve and the rotating piece can effectively guarantee the clamping stability of the fastener to the scaffold steel pipe; and the fastener fixed part and the fastener movable part can be rotated and opened to finish disassembly by disassembling the connecting piece 1.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a scaffold steel pipe fastener. BACKGROUND

[0002] In the field of building construction, scaffolding, as a key temporary structure for supporting and working platforms, its stability and safety are directly related to the life safety of construction personnel and the smooth progress of engineering projects. As the main component connecting scaffold steel pipes, the performance and quality of scaffold steel pipe fasteners play a crucial role in the stability of the entire scaffold system. Traditional scaffold steel pipe fasteners usually use a combination of bolts and nuts for fastening. Although this connection method can meet the basic connection requirements to some extent, it has exposed a series of problems in actual application.

[0003] Firstly, the traditional bolt and nut connection method is prone to loosening under long-term use or in harsh environments. Due to the complex and variable environment of the construction site, scaffolding often needs to bear loads from different directions, such as wind load, construction load, etc. The long-term effect of these loads will gradually reduce the friction between the bolt and the nut, causing loosening. Once the bolt and nut are loose, the clamping force of the fastener will be greatly reduced, thereby affecting the overall stability of the scaffold and increasing the safety hazards during construction.

[0004] Secondly, the problem of bolt thread slipping is also one of the common faults in traditional fasteners. During the repeated tightening and loosening of the bolt, due to thread wear and corrosion, the threaded part of the bolt may become smooth, unable to form effective thread cooperation with the nut. In this case, even if the nut is tightened, it cannot provide enough clamping force to maintain the stability of the fastener, which may cause the fastener to fail. INVENTION CONTENTS

[0005] To solve the above problems, the utility model aims to provide a scaffold steel pipe fastener that solves the problem of traditional scaffold steel pipe fasteners being mainly fastened by bolts and nuts, which affects the overall stability of the scaffold after the bolt slips or loosens.

[0006] In order to achieve the above object, the utility model discloses the technical scheme that a scaffold steel pipe fastener is adopted, including fastener fixed part, fastener fixed part is connected with fastener movable part through the rotation of self -locking pin axle subassembly, the bolt is inserted on fastener fixed part, the nut is connected with bolt thread, the self -locking pin axle subassembly includes connecting piece no. 1 and connecting piece no. 2, connecting piece no. 1 is inserted on fastener movable part, connecting piece no. 2 includes outer sleeve and rotating part, the outer sleeve is fixed in fastener fixed part, the rotating part is integrally formed by elastic pawl and connecting rod, the elastic pawl one -way clamping ratchet groove, the ratchet groove is set up on the inner wall of outer sleeve, the connecting rod is inserted in connecting piece no. 1 and slides.

[0007] The utility model discloses the beneficial effect that when the bolt structure of fastener fixed part and fastener movable part loosens, the one -way ratchet structure of outer sleeve and rotating part can effectively guarantee the stability that fastener holds scaffold steel pipe, and through the removal of connecting piece no. 1, fastener fixed part and fastener movable part can be rotated and opened to complete the disassembly.

[0008] In order to make fastener movable part drive connecting piece no. 1 to rotate stably and synchronously,

[0009] As the further improvement of the above technical scheme, the curved surface side of connecting piece no. 1 is provided with pin key groove, and the inner wall of the through hole of fastener movable part for inserting connecting piece no. 1 is formed with a protrusion matching the pin key groove.

[0010] The beneficial effect of the improvement is that connecting piece no. 1 can only move relative to fastener movable part in the axial direction, and the design of pin key groove and protrusion effectively avoids relative rotation of fastener movable part and connecting piece no. 1.

[0011] In order to ensure the stability of the installation of connecting piece no. 1 on fastener movable part,

[0012] As the further improvement of the above technical scheme, the part of connecting rod located outside fastener movable part is provided with a positioning groove for clamping a C-shaped clamp spring.

[0013] The beneficial effect of the improvement is that the C-shaped clamp spring plays a limiting role, avoiding sliding of connecting piece no. 1 relative to the rotating part and falling off from fastener movable part.

[0014] In order to make connecting rod drive connecting piece no. 1 to rotate stably,

[0015] As the further improvement of the above technical scheme, the connecting rod is a right prism structure.

[0016] The beneficial effect of the improvement is that the right prism structure ensures that connecting piece no. 1 and the rotating part can slide relative to each other, and makes connecting rod drive connecting piece no. 1 to rotate stably.

[0017] In order to guarantee the stability of the elastic pawl and the sleeve;

[0018] As a further improvement of the above technical solution: the number of elastic pawls is multiple, and is arranged equidistantly around the axis of the sleeve.

[0019] The beneficial effect of the improvement is that multiple elastic pawls can be evenly stressed to clamp the ratchet groove, thereby guaranteeing the stability of the sleeve and the rotating member.

[0020] In order to facilitate the disassembly of the rotating member and the sleeve;

[0021] As a further improvement of the above technical solution: the ratchet groove penetrates through the end faces of the sleeve.

[0022] The beneficial effect of the improvement is that the rotating member can be smoothly taken out from any side of the sleeve.

[0023] The parts not involved in the device are the same as or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a sectional view of the utility model;

[0026] Figure 3 It is an explosion view of the self-locking pin shaft assembly in the utility model;

[0027] Figure 4 It is a structural schematic diagram of the rotating member in the utility model;

[0028] In the figure: 1, buckle fixed part; 2, self-locking pin shaft assembly; 3, buckle movable part; 4, bolt; 5, nut; 6, connecting piece one; 7, connecting piece two; 8, sleeve; 81, ratchet groove; 9, rotating member; 91, elastic pawl; 92, connecting rod; 93, positioning groove; 10, C-shaped clamp spring. DETAILED DESCRIPTION

[0029] In order to make the skilled in the art better understand the technical solution of the present application, the present application will be described in detail below in combination with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0030] Example 1:

[0031] As Figure 1A scaffold steel pipe fastener, comprising a fastener fixed part 1, the fastener fixed part 1 is rotatably connected with a fastener movable part 3 through a self-locking pin shaft assembly 2, a bolt 4 is inserted on the fastener fixed part 1, the bolt 4 is screwed with a nut 5, the self-locking pin shaft assembly 2 comprises a connecting piece one 6 and a connecting piece two 7, the connecting piece one 6 is inserted on the fastener movable part 3, the connecting piece two 7 comprises a sleeve 8 and a rotating part 9, the sleeve 8 is fixedly arranged on the fastener fixed part 1, the rotating part 9 is integrally formed by an elastic pawl 91 and a connecting rod 92, the elastic pawl 91 is unidirectionally clamped with a ratchet groove 81, the ratchet groove 81 is arranged on the inner wall of the sleeve 8, the connecting rod 92 is slidably inserted in the connecting piece one 6, when the bolt structure is loose, the unidirectional ratchet structure composed of the sleeve 8 and the rotating part 9 can effectively ensure the stability of the fastener clamping the scaffold steel pipe; the fastener fixed part 1 and the fastener movable part 3 can be rotated and opened to complete disassembly by removing the connecting piece one 6, a pin key groove is arranged on the curved surface of the connecting piece one 6, a protrusion matched with the pin key groove is formed on the inner wall of the through hole of the fastener movable part 3 for inserting the connecting piece one 6, the connecting piece one 6 can only move relative to the fastener movable part 3 in the axial direction, the design of the pin key groove and the protrusion effectively avoids the relative rotation of the fastener movable part 3 and the connecting piece one 6, a positioning groove 93 for clamping a C-shaped clamp spring 10 is arranged on the part of the connecting rod 92 outside the fastener movable part 3, the C-shaped clamp spring 10 plays a limiting role to avoid the relative rotation of the connecting piece one 6 and the rotating part 9, and then falls off from the fastener movable part 3, the connecting rod 92 is a right prism structure, which can ensure the mutual sliding movement of the connecting piece one 6 and the rotating part 9, and make the connecting rod 92 stably rotate with the connecting piece one 6, the number of the elastic pawls 91 is multiple, and they are equidistantly arranged around the axis of the sleeve 8, the multiple elastic pawls 91 can be evenly clamped with the ratchet grooves 81 to ensure the stability of the engagement between the sleeve 8 and the rotating part 9, the ratchet grooves 81 penetrate through the end faces of the sleeve 8, and the rotating part 9 can be smoothly taken out from any side of the sleeve 8.

[0032] The working principle of the technical solution is as follows: the fastener fixed part 1 and the fastener movable part 3 are sleeved on the scaffold steel pipe, and the nut 5 is screwed to generate a screw pair movement with the bolt 4, so that the fastener fixed part 1 and the fastener movable part 3 are clamped on the scaffold steel pipe; in the process of the fastener fixed part 1 and the fastener movable part 3 rotating towards each other, the connecting piece one 6 rotates synchronously with the fastener movable part 3 under the action of the pin key, the outer sleeve 8 rotates synchronously with the fastener fixed part 1, the connecting piece one 6 drives the rotating piece 9 to rotate synchronously when rotating, when the rotating piece 9 rotates as a whole, the elastic pawl 91 is one-way engaged with the ratchet groove 81 and repeatedly clamped in the ratchet groove 81; when the bolt 4 is loose or the bolt 4 slips, the fastener movable part 3 rotates away from the fastener fixed part 1 under the action of gravity, at this time, the end of the elastic pawl 91 is clamped in the ratchet groove 81, effectively ensuring the safety of the use of the fastener; when the scaffold is disassembled, the C-shaped clamp spring 10 is removed from the rotating piece 9 using a tool, and then the connecting piece one 6 is slid out, so that the fastener fixed part 1 and the fastener movable part 3 can rotate without obstruction, so that the fastener releases the scaffold steel pipe.

[0033] It should be noted that in this text, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0034] The principles and embodiments of the application are described in this text, and the above examples are only used to help understand the method and core idea of the application. The above description is only the preferred embodiment of the application. It should be noted that due to the limitation of language expression, there are infinite specific structures objectively, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principles of the application, or the above technical features can be combined in a proper way; these improvements, decorations, changes or combinations, or the application of the concept and technical solution of the application to other fields without improvement, shall be regarded as the protection scope of the application.

Claims

1. A scaffolding steel pipe coupler, characterized in that: The fastener includes a fastener fixing part (1), which is rotatably connected to a fastener movable part (3) via a self-locking pin assembly (2). A bolt (4) is inserted into the fastener fixing part (1), and a nut (5) is threaded onto the bolt (4). The self-locking pin assembly (2) includes a first connector (6) and a second connector (7). The first connector (6) is inserted into the fastener movable part (3). The second connector (7) includes an outer sleeve (8) and a rotating part (9). The outer sleeve (8) is fixed to the fastener fixing part (1). The rotating part (9) is integrally formed by an elastic pawl (91) and a connecting rod (92). The elastic pawl (91) engages with a ratchet groove (81) in one direction. The ratchet groove (81) is opened on the inner wall of the outer sleeve (8). The connecting rod (92) is slidably inserted into the first connector (6).

2. A scaffolding steel pipe coupler according to claim 1, characterized in that: The curved side surface of the connector (6) is provided with a keyway, and the inner wall of the through hole for inserting the connector (6) on the fastener movable part (3) is formed with a protrusion adapted to the keyway.

3. A scaffolding steel pipe coupler according to claim 1, characterized in that: The connecting rod (92) located outside the fastener movable part (3) has a positioning groove (93) for mounting a C-type snap ring (10).

4. A scaffolding steel pipe coupler according to claim 1, characterized in that: The connecting rod (92) is a regular prism structure.

5. A scaffolding steel pipe coupler according to claim 1, characterized in that: The number of elastic pawls (91) is multiple, and they are equidistantly spaced around the axis of the outer sleeve (8).

6. A scaffolding steel pipe coupler according to claim 1, characterized in that: The ratchet (81) extends through both end faces of the outer sleeve (8).

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