Steel grating mounting clamp device of clamping plate positioning nut self-balancing fastener

Abstract

The utility model relates to a steel grating mounting clamp device of a clamping plate positioning nut self-balancing fastener. The problem to be solved is that a lower clamp and a steel beam are easy to slip and separate; the upper plane of the lower clamp is provided with a slotted hole to cause deflection of bolts and nuts and false fastening of the upper clamp and the lower clamp; a part of the upper surface of the lower clamp is clamped on the cross beam and deflects towards the periphery to be separated from the cross beam when vibrating; and the lower clamp of the mounting clamp cannot load larger tightening force. According to the technical scheme, the clamping plate is embedded into a gap between the two adjacent flat steel bars so that the clamping plate can not rotate in the horizontal plane, pin shaft holes which are symmetrical in position are formed in the two side edges of the clamping plate, nuts with pin shafts penetrate into the pin shaft holes, retaining clamping grooves which are symmetrical in position are formed in the upper portions of the two adjacent flat steel bars, and the two clamping grooves of the upper clamp are matched with the retaining clamping grooves in an embedded mode. Tooth profiles are arranged at the positions where the steps are buckled with the fixed steel beams to prevent sliding, and supporting blocks which are symmetrical in position are further arranged on the two side edges of the clamping plate. The method is suitable for mounting the steel grating.

Description

Technical Field

[0001] The utility model relates to a steel grating installation device, in particular to a steel grating installation clamp device with a clamping plate positioning nut and a self-balancing fastener. Background Art

[0002] Currently, steel grating mounting clamps consist of an upper clamp, bolts, and a lower clamp stamped from steel plate. The upper clamp is an M-shaped fastener with a circular hole in the center, which snaps onto the upper surface of two adjacent flat steel bars of the steel grating. The lower clamp is stamped from a thinner piece of steel plate, with one end bent upward 90 degrees and several notches cut at the upward bend to allow it to snap onto the lower surface of the flat steel. The other end of the lower clamp is formed by bending both sides of the steel plate downward to form an inverted U-shape with a long groove on the upper surface. A bolt passes through the circular hole in the upper clamp and the long slot in the lower clamp, and a nut is tightened to secure the steel grating to the steel beam. The disadvantages of the existing mounting clamp device are: ① The friction between the lower clamp and the steel grating or steel beam limits the horizontal rotation freedom, which is unreliable and easy to slip and detach; ② There are long slots on the upper plane of the lower clamp for adjusting the position of the fastening bolts, but in the process of tightening the bolts, since the upper plane of the lower clamp is not parallel to the plane of the steel grating, the bolts and nuts will be deflected, resulting in false tightening of the upper and lower clamps; ③ A part of the upper surface of the lower clamp is stuck on the beam, and this part is in the shape of an inverted U, which is stamped out. The upper surface is smooth and the friction is relatively small. When there is vibration, it will deflect toward the periphery until it detaches from the beam, resulting in installation failure; ④ Due to the complex shape of the lower clamp of the existing stamped mounting clamp and the limitation of the flat steel spacing, the strength and rigidity are poor, and it cannot load a large tightening force at all, so it is easy to loosen. Summary of the Invention

[0003] The purpose of the present utility model is to propose a new type of mounting clamp lower clamp to solve the problems existing in the background technology: ① The lower clamp relies on the friction between the steel grating or steel beam to limit the horizontal rotation freedom, which is unreliable and can easily slip and detach; ② The upper plane of the lower clamp is provided with long slots for adjusting the position of the fastening bolts, but in the process of fastening the bolts, since the upper plane of the lower clamp is not parallel to the plane of the steel grating, the bolts and nuts will be deflected, resulting in false tightening of the upper and lower clamps; ③ A part of the upper surface of the lower clamp is stuck on the beam, and this part is in the shape of an inverted U, which is stamped out, resulting in a smooth upper surface and low friction. In the event of vibration, it will deflect toward the periphery until it detaches from the beam, resulting in installation failure; ④ The lower clamp of the existing stamped mounting clamp has a complex shape and is limited by the spacing of the flat steel, so its strength and rigidity are poor, and it cannot load a large tightening force at all, so it is easy to loosen.

[0004] The technical solution adopted to solve this technical problem is: a steel grating installation clamp device with a card plate positioning nut self-balancing fastener, characterized in that: the channel steel serving as the lower clamp is composed of a card plate and a step, the card plate is embedded in the gap between two adjacent flat steels so that the card plate does not rotate in the horizontal plane, symmetrical pin shaft holes are set on the two side edges of the card plate, nuts with pin shafts are inserted into the pin shaft holes, and the tightening process of the bolts and the nuts with pin shafts is automatically balanced, symmetrical anti-retraction grooves are set on the upper parts of the two adjacent flat steels, the two card slots of the upper clamp are embedded in and matched with the anti-retraction grooves, so that the top surface of the upper clamp is less than or equal to the upper surface of the flat steel, and teeth are set at the position where the step is buckled with the fixed steel beam to prevent sliding, and symmetrical support blocks are also set on the two side edges of the card plate.

[0005] Compared with the background technology, the beneficial effects of the present invention are as follows: due to the adoption of the above-mentioned technical scheme, channel steel is adopted as the lower clamp fastener, and the channel steel is penetrated into the gap between the flat steels to limit its rotation, thereby ensuring that the lower clamp will not rotate in the horizontal plane; a nut with a pin shaft is inserted into the channel steel, and the pin shaft is rotated in the holes on the edges of the channel steel on both sides to ensure automatic balance during the tightening of the bolt; a back-stop groove is provided on the flat steel to make the top surface of the upper clamp and the upper surface of the steel grating in the same horizontal plane, thereby avoiding the formation of a bulge in the upper clamp; the skew force caused by the nut being not parallel to the fastened plane is avoided, thereby ensuring effective fastening; the position where the channel steel is fastened to its fixed crossbeam is made into a tooth shape, thereby ensuring that the fastening point can generate a large pressure, preventing sliding, and ensuring effective fastening and no falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is an axonometric drawing of the present utility model. Figure 2 It is an axonometric drawing of the present invention from another direction. Figure 3 It is an axonometric drawing of the lower clamp of the utility model. DETAILED DESCRIPTION

[0007] Example: Reference Figure 1 、 Figure 2 、 Figure 3 A steel grating installation clamp device with a card plate positioning nut self-balancing fastener is characterized in that: the channel steel 1 serving as the lower clamp is composed of a card plate 6 and a step 11. The card plate 6 is embedded in the gap between two adjacent flat steels 2 so that the card plate 6 does not rotate in the horizontal plane. Symmetrical pin holes 3 are set on the two side edges of the card plate 6. Nuts 4 with pins are inserted into the pin holes 3. The bolts 5 and the nuts 4 with pins are automatically balanced during the tightening process. Symmetrical anti-retraction grooves 12 are set on the upper parts of the two adjacent flat steels 2. The two card slots of the upper clamp 10 are embedded in and matched with the anti-retraction grooves 12 so that the top surface of the upper clamp 10 is less than or equal to the upper surface of the flat steel 2. A tooth shape 8 is set at the position where the step 11 is buckled with the fixed steel beam 7 to prevent sliding. Symmetrical support blocks 9 are also set on the two side edges of the card plate 6.

Claims

1. A steel grating mounting clamp device with a self-balancing fastener and a positioning nut, characterized by: The channel steel (1) as the lower clamp is composed of a card plate (6) and a step (11). The card plate (6) is embedded in the gap between two adjacent flat steels (2) so that the card plate (6) does not rotate in the horizontal plane. The two side edges of the card plate (6) are provided with symmetrical pin holes (3). The pin holes (3) are penetrated with nuts (4) with pins. The bolts (5) and the nuts (4) with pins are automatically balanced during the tightening process. The upper parts of the two adjacent flat steels (2) are provided with symmetrical anti-retraction grooves (12). The two card slots of the upper clamp (10) and the anti-retraction grooves (12) are embedded in each other so that the top surface of the upper clamp (10) is less than or equal to the upper surface of the flat steel (2). The step (11) is provided with a toothed shape (8) at the position where it is buckled with the fixed steel beam (7) to prevent sliding. The two side edges of the card plate (6) are also provided with symmetrical support blocks (9).

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