Adjustable fixing device for building temporary support

Abstract

The utility model belongs to the technical field of building temporary support fixing, and particularly relates to a building temporary support adjustable fixing device which comprises two cross-shaped fasteners, each cross-shaped fastener comprises an upper half portion and a lower half portion, and the other end of each upper half portion and the other end of each lower half portion are connected with a first connecting piece and a second connecting piece respectively. Fasteners are arranged in the first connecting piece and the second connecting piece; the fastener comprises a threaded column, four movable arms are hinged to the lower end of the threaded column, barbs are arranged at the lower ends of the four movable arms, first threads are arranged on the outer wall of the threaded column, a circular through hole is formed in the middle of the threaded column, second threads are arranged in the circular through hole, the outer wall of the threaded column is in threaded connection with a first nut, and a bolt is in threaded connection with the interior of the threaded column. A pushing block is movably arranged at the lower end of the bolt and provided with a second nut. According to the cross fastener, the locking piece can be directly inserted into the round holes in the upper half part and the lower half part, and then the cross fastener can be fastened by directly using an electric wrench.

Description

Technical Field

[0001] This utility model belongs to the field of building temporary support fixing technology, specifically relating to an adjustable fixing device for building temporary supports. Background Technology

[0002] Existing temporary building scaffolds use steel pipes and cross-shaped fasteners to vertically fix two steel pipes together. However, the existing cross-shaped fasteners are divided into an upper half and a lower half, with one end of the upper half and the lower half hinged together by a hinge shaft. The other end of the upper half and the lower half are connected to a connector with a round hole. Bolts are inserted into the round hole, and then nuts are put on and tightened with an electric wrench. However, when actually locking the upper half and the lower half of the cross-shaped fastener, a worker needs to use one hand to insert the bolts into the round holes on the connecting parts of the upper half and the lower half in turn, then manually tighten a nut, and finally use an electric wrench to tighten it. To address this, this utility model proposes an adjustable fixing device for temporary building scaffolds. The locking part can be directly inserted into the round hole on the connecting part of the upper half and the lower half, and then tightened directly with an electric wrench, thus completing the tightening of the cross-shaped fastener. Utility Model Content

[0003] The purpose of this utility model is to provide an adjustable fixing device for temporary building supports, which allows the locking element to be directly inserted into the round holes on the upper and lower connecting parts, and then tightened directly with an electric wrench to complete the tightening of the cross fastener.

[0004] The specific technical solution adopted by this utility model is as follows:

[0005] An adjustable fixing device for temporary building supports includes two cross-shaped fasteners. Each cross-shaped fastener includes an upper half and a lower half. One end of the upper half and the lower half are hinged together, and the other end of the upper half and the lower half are respectively connected to a first connector and a second connector. The first connector and the second connector have circular through holes. Fasteners are installed in the circular through holes of the first connector and the second connector.

[0006] The fastener includes a threaded post with four movable arms hinged to its lower end. The lower ends of the four movable arms are provided with barbs. The outer wall of the threaded post is provided with a first thread. A circular through hole is opened in the middle of the threaded post. A second thread is provided in the circular through hole. A first nut is threaded onto the first thread on the outer wall of the threaded post. A bolt is threaded onto the second thread in the middle of the threaded post. A push block is movably provided at the lower end of the bolt. A second nut is provided on the push block.

[0007] Preferably, the lower end of the threaded column is provided with a hinge shaft, the movable arm is movably connected to the hinge shaft, a torsion spring is sleeved on the hinge shaft, and the torsion spring is connected to the movable arm.

[0008] Preferably, the outer diameter of the threaded post is smaller than the inner diameter of the circular through hole opened on the first connector and the second connector; under the action of the torsion spring, the lower ends of the four movable arms retract inward, and after the lower ends of the four movable arms retract, the size of the four barbs is smaller than the inner diameter of the circular through hole opened on the first connector and the second connector.

[0009] Preferably, when the first nut and the second nut rotate synchronously at the same speed, the first nut and the second nut descend or rise to the same height synchronously.

[0010] Preferably, the two cross-shaped fasteners are connected at their midpoints by a movable shaft.

[0011] Preferably, the push block has a trapezoidal frustum structure, and the sidewall of the push block is in contact with the sidewall of the movable arm.

[0012] The technical effects achieved by this utility model are as follows:

[0013] This invention allows fasteners to be directly inserted into the circular through holes on the first and second connectors, reaching the very bottom so that the upper end of the barb is below the lower end of the second connector. Then, an electric wrench is used to simultaneously tighten the first and second nuts. A specific electric wrench head is used here, with sufficient depth to simultaneously tighten both the first and second nuts, thus completing the tightening of the upper and lower halves of the cross-shaped fastener. This eliminates the need for "a worker to use one hand to insert bolts into the circular holes on the upper and lower connectors in sequence, then manually tighten one nut, and finally use an electric wrench to tighten"; achieving a faster tightening of the cross-shaped fastener. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an adjustable fixing device for temporary building supports according to this utility model;

[0015] Figure 2 This is a cross-sectional view of the fastener of this utility model connected to a cross-shaped fastener;

[0016] Figure 3 This is a cross-sectional structural diagram showing the connection between the fastener of this utility model and the first and second connecting parts in a cross-shaped fastener;

[0017] Figure 4 This is a schematic diagram of the overall structure of the fastener of this utility model.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Cross fastener; 2. Fastener; 101. Upper half; 102. Lower half; 103. First connector; 104. Second connector; 201. Threaded post; 202. Movable arm; 203. Barb; 204. First thread; 205. Second thread; 206. First nut; 207. Bolt; 208. Push block; 209. Hinge shaft; 210. Second nut. Detailed Implementation

[0020] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0021] like Figures 1-4 As shown, an adjustable fixing device for temporary building supports includes two cross-shaped fasteners 1. The two cross-shaped fasteners 1 are connected at the middle by a movable shaft, allowing them to rotate relative to each other without disengaging. Each cross-shaped fastener 1 includes an upper half 101 and a lower half 102. One end of the upper half 101 and the lower half 102 are hinged, and the other end of the upper half 101 and the lower half 102 are respectively connected to a first connector 103 and a second connector 104. The first connector 103 and the second connector 104 have circular through holes. Fasteners 2 are located inside the circular through holes of the first connector 103 and the second connector 104.

[0022] Fastener 2 includes a threaded post 201, with four movable arms 202 hinged to the lower end of the threaded post 201. The lower ends of the four movable arms 202 are provided with barbs 203. The outer wall of the threaded post 201 is provided with a first thread 204. A circular through hole is opened in the middle of the threaded post 201. A second thread 205 is provided in the circular through hole. A first nut 206 is threadedly connected to the first thread 204 on the outer wall of the threaded post 201. A bolt 207 is threadedly connected to the second thread 205 in the middle of the threaded post 201. A push block 208 is movably provided at the lower end of the bolt 207. A second nut 210 is provided on the push block 208.

[0023] like Figures 1-4As shown, in this utility model, the fastener 2 is directly inserted into the circular through holes opened on the first connector 103 and the second connector 104, and inserted to the bottom, so that the upper end of the barb 203 is located below the lower end of the lower end face of the second connector 104. Then, an electric wrench is used to simultaneously tighten the first nut 206 and the second nut 210. Here, a specific electric wrench head is used, and the depth of the electric wrench head is sufficient to simultaneously tighten the first nut 206 and the second nut 210, thus completing the tightening of the upper half 101 and the lower half 102 of the cross fastener 1. It is no longer necessary to "have a worker insert the bolt into the circular holes on the upper half 101 and the lower half 102 of the connector in turn with one hand, and then manually tighten one nut before using an electric wrench to tighten it"; thus achieving a faster tightening of the cross fastener 1.

[0024] Preferably, the lower end of the threaded column 201 is provided with a hinge shaft 209, the movable arm 202 is movably connected to the hinge shaft 209, a torsion spring is sleeved on the hinge shaft 209, and the torsion spring is connected to the movable arm 202; the outer diameter of the threaded column 201 is smaller than the inner diameter of the circular through holes opened on the first connector 103 and the second connector 104; under the action of the torsion spring, the lower ends of the four movable arms 202 retract inward, and after the lower ends of the four movable arms 202 retract, the size of the four barbs 203 is smaller than the inner diameter of the circular through holes opened on the first connector 103 and the second connector 104;

[0025] like Figures 1-4 As shown, in actual use, under the action of the torsion spring, the lower end of the movable arm 202 moves closer to the center, making it easier to directly insert the lower ends of the four movable arms 202 into the circular through holes opened on the first connector 103 and the second connector 104; the push block 208 has a trapezoidal frustum structure, and the side wall of the push block 208 fits against the side wall of the movable arm 202.

[0026] Preferably, during the actual processing, the threads of the first nut 206, the second thread 205 in the threaded post 201, the first thread 204 in the threaded post 201, and the threads of the bolt 207 are finely set so that when the first nut 206 and the second nut 210 rotate synchronously at the same speed, the first nut 206 and the second nut 210 fall or rise to the same height synchronously.

[0027] like Figures 1-4As shown, in practical use, this utility model firstly uses an electric wrench to simultaneously tighten the first nut 206 and the second nut 210, causing both the first nut 206 and the second nut 210 to move downwards. When the first nut 206 moves downwards, the distance between the first nut 206 and the hook 203 bracket is shortened, completing the tightening of the upper half 101 and the lower half 102. When the second nut 210 moves downwards, it drives the bolt 207 downwards, which in turn drives the push block 208 downwards. The inclined sidewall of the push block 208 presses down on the movable arm 202, causing the movable arm 202 to open, thereby causing the hook 203 to expand outwards. The upper end of hook 203 is in contact with the lower end face of the second connector 104; then the electric wrench is turned off and lifted upwards, causing the electric wrench to turn the second nut 210, which only drives bolt 207 downwards. Bolt 207 then drives push block 208 downwards, causing movable arm 202 to continue to open. During the opening of movable arm 202, the upper end of hook 203 rotates upwards around the center of hinge shaft 209. Because the upper end of hook 203 is upwards relative to the second connector 104, it further tightens the gap between the upper end of hook 203 and the lower surface of the first nut 206, further securing the upper half 101 and the lower half 102. The cross fastener 1 is fully tightened.

[0028] like Figures 1-4 As shown, the working principle of this utility model is as follows: Fastener 2 is directly inserted into the circular through holes opened on the first connector 103 and the second connector 104, and inserted to the very bottom, so that the upper end of the barb 203 is located below the lower end of the lower surface of the second connector 104; First, the first nut 206 and the second nut 210 are simultaneously tightened using an electric wrench, causing the first nut 206 to move downwards and the second nut 210 to move downwards simultaneously. When the first nut 206 moves downwards, the distance between the first nut 206 and the barb 203 bracket is shortened, completing the tightening of the upper half 101 and the lower half 102. When the second nut 210 moves downwards, it drives the bolt 207 downwards, and the bolt 207 drives the pushing block 208 downwards, causing the inclined sidewall of the pushing block 208 to press downwards. The movable arm 202 is opened, causing the barb 203 to expand outward, so that the upper end of the barb 203 is in contact with the lower end face of the second connecting member 104. Then, the electric wrench is turned off and raised upward, so that the electric wrench is turned to tighten the second nut 210, only driving the bolt 207 downward. The bolt 207 then drives the push block 208 downward, causing the movable arm 202 to continue to open. During the opening of the movable arm 202, the upper end of the barb 203 rotates upward around the center of the hinge shaft 209. Because the upper end of the barb 203 is upward relative to the second connecting member 104, it further locks the distance between the upper end of the barb 203 and the lower surface of the first nut 206, further tightening the upper half 101 and the lower half 102. The cross fastener 1 is fully tightened.

[0029] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A kind of adjustable fixing device of building temporary support, including two cross fasteners (1), the cross fastener (1) includes upper half (101) and lower half (102), upper half (101) and lower half (102) one end articulates, upper half (101) and lower half (102) the other end is connected with first connecting piece (103) and second connecting piece (104) respectively, first connecting piece (103) and second connecting piece (104) are opened with circular through-hole;It is characterized by: The circular through hole of the first connecting piece (103) and the second connecting piece (104) is provided with a fastener (2); The fastener (2) comprises a threaded column (201), four movable arms (202) are hinged to the lower end of the threaded column (201), the lower end of the four movable arms (202) is provided with a barb (203), a first thread (204) is arranged on the outer wall of the threaded column (201), a circular through hole is formed in the middle of the threaded column (201), a second thread (205) is arranged in the circular through hole, a first nut (206) is threadedly connected to the first thread (204) on the outer wall of the threaded column (201), a bolt (207) is threadedly connected to the second thread (205) in the middle of the threaded column (201), a push block (208) is movably arranged at the lower end of the bolt (207), and a second nut (210) is arranged on the push block (208).

2. A building temporary support adjustable fixing device according to claim 1, characterized in that: The lower end of the threaded column (201) is provided with a hinge shaft (209), the movable arm (202) is movably connected with the hinge shaft (209), a torsional spring is sleeved on the hinge shaft (209), and the torsional spring is connected with the movable arm (202).

3. The adjustable fixing device of claim 1, wherein: The outer diameter of the threaded column (201) is smaller than the inner diameter of the circular through hole formed on the first connecting piece (103) and the second connecting piece (104); under the action of the torsional spring, the lower ends of the four movable arms (202) are inwardly contracted, the size of the four barbs (203) after the contraction of the lower ends of the four movable arms (202) is smaller than the inner diameter of the circular through hole formed on the first connecting piece (103) and the second connecting piece (104).

4. The adjustable fixing device for a construction temporary support according to claim 1, characterized in that: When the first nut (206) and the second nut (210) are synchronously and identically rotated, the first nut (206) and the second nut (210) synchronously descend or ascend by the same height.

5. The adjustable fixing device of claim 1, wherein: The middle portions of the two cross-shaped buckles (1) are connected through movable shafts.

6. The adjustable fixing device of claim 1, wherein: The push block (208) is in the shape of a trapezoidal circular table, and the side wall of the push block (208) is in close contact with the side wall of the movable arm (202).

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