JPH0450768Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a clamp used for temporary construction work at construction and civil engineering sites. This invention relates to a clamp for temporary construction work, which has a screw shaft for clamping and fixing an object to be clamped and fixed therethrough.

(Prior art and its problems) This type of clamp is used to attach various temporary members, such as scaffolding members and handrail members, to the steel frame of a building under construction. The edge portion of the steel frame is clamped and fixed between the tip of a clamping screw that passes through one leg of the main body and the other leg of the main body. Even if the clamp was tightened, there was a risk of slippage between the tip of the clamp screw shaft and the surface of the steel frame due to vibrations caused by construction work, and the clamp would unexpectedly fall off the edge of the steel frame.

(Means for Solving the Problems) The present invention provides a clamp that can solve the conventional problems as described above, and its feature is that one of the legs of the U-shaped body is The leg on the side facing the screw shaft is provided with side parts that protrude on both the left and right sides, and cuts in the left and right transverse direction are made from the side edges at appropriate intervals in the length direction of the sides on both sides. A plurality of pieces are provided, and for each cut, a portion adjacent to the free end side of the leg is raised toward the other leg side to form a cut and raised tongue piece.

(Embodiment) An embodiment of the present invention will be described below based on the attached illustrative drawings. 1 is a U-shaped main body, which connects both legs 2 and 3 facing each other. A reinforcing protrusion 5 is molded on the connecting part 4 and continues in a U-shape leaving the left and right sides 6, and the protruding part 5 on one leg 2 has a bar ring 7 that protrudes inward. A through screw hole 8 is formed which is longer than the plate thickness. Reference numeral 9 denotes a screw shaft for a clamp that is screwed through the through screw hole 8, and a pressure plate 10 using a disc spring is attached to the inner end so as to be relatively rotatable, and a rotation operation part 11 is connected to the outer end. has been done. Although not shown in the figure, through screw holes longer than the plate thickness are formed in the other leg portion 3 and the connecting portion 4 of the main body 1 by burring as described above, and these through screw holes can be used to and attach the member to the main body 1.
It is used by attaching it to the.

In the above-mentioned clamp, the left and right sides 6 of the leg portion 3 on the side opposite to the clamp screw shaft 9
A plurality of cuts 12 in the left and right transverse direction are provided at appropriate intervals from the side edge, and a leg 3 is provided for each cut 12.
A cut-and-raised tongue piece 1 that protrudes diagonally toward the base of the leg 3 on the side where the clamping screw shaft 9 is located by raising the portion adjacent to the free end side of the leg 2 to the side where the leg 2 is located.
3 is formed.

By providing the cut and raised tongue piece 13 as described above, the steel frame edge portion 14 sandwiched between the pressing plate 10 and the leg portion 13 of the screw shaft 9 for clamping can be cut and raised as shown in FIGS. 1 and 2. When clamping and fixing is done by tightening the clamping screw shaft 9, both sides 6 of the leg 3
Each cut and raised tongue piece 13 in the steel frame edge part 1
4, and deforms outward against elasticity until it is substantially flush with the inner surfaces of both sides 6. Therefore, the tip of each cut-and-raised tongue piece 13 bites into the surface of the steel frame edge part 14 due to the deformation reaction force.

(Operations and Effects of the Invention) As described above, according to the clamp for temporary construction work of the present invention, even if vibrations caused by construction work cause slippage between the surface of the object to be clamped and the tip of the clamping screw shaft, The cut-and-raised tongue piece that bites into the surface of the clamped object (steel frame edge, etc.) that is clamped and fixed between the tip of the clamping screw shaft and the leg of the U-shaped main body reliably prevents it from slipping even in situations such as do. Therefore, it can be used safely even in places with strong vibrations.

Moreover, the anti-slip means of the present invention is provided with a plurality of cuts in the left and right transverse direction from the side edges at appropriate intervals in the lengthwise direction of the sides on the side parts that protrude on both the left and right sides of the main body legs. On the other hand, since it is a cut-and-raised tongue piece formed by raising the part adjacent to the free end side of the leg toward the other leg side, it is simply a piece with anti-slip grooves carved on the front and back sides that contact the object to be held. In comparison, even if the clamping force of the clamping screw shaft on the clamped object is weak, the sharp side edge of the sawtooth-like cut against the surface of the clamped object that is about to slide out will cause the overhanging side edge to The elasticity and the elasticity of the cut-and-raised tongue piece ensure that it bites into the tongue piece, ensuring a reliable slip-out prevention effect.

[Brief explanation of drawings]

Figure 1 is a side view when in use, Figure 2 is a front view of the same, Figure 3 is a side view of the main parts when not in use, and Figure 4 is a side view of the main parts when not in use.
The figure is a longitudinal sectional front view of the same, and FIG. 5 is a sectional plan view of the same. 1... U-shaped main body, 2, 3... Legs, 4...
Connecting portion, 5... Reinforcing protrusion, 6... Side portion projecting left and right, 9... Screw shaft for clamp, 12... Cut, 13... Cut and raised tongue piece.

Claims (1)

[Scope of utility model registration request] A clamp for temporary construction in which a screw shaft for clamping is passed through one of the U-shaped main body and both legs of the main body to clamp and fix an object between the other leg, wherein both legs of the main body The leg on the side facing the clamping screw shaft is provided with side parts that protrude on both the left and right sides, and cuts are made in the left and right transverse direction from the side edges to the length of the sides. A clamp for temporary construction work, in which a plurality of clamps are provided at appropriate intervals in the widthwise direction, and a portion adjacent to the free end side of the leg is raised toward the other leg side for each cut to form a tongue piece.