JPH024205Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a mold release device for removing formwork used for pouring concrete from a concrete molding.

Prior Art Generally, when pouring mortar, concrete, etc., a formwork is installed in the desired shape, firmly supported by shoring materials, and then the mortar or concrete is poured and the concrete, etc. hardens. The formwork is then removed, but in this case, the formwork and solidified concrete, mortar, etc. are strongly bonded, so even if the formwork is coated with a mold release agent made of various oils and fats in advance, Removing the formwork is not easy. Currently, formwork is removed from a concrete molded body by hammering it or prying it with a metal pry bar.

Problems to be solved When removing the formwork as described above, especially in the case of metal formwork panels, the formwork is often damaged or deformed, making it impossible to use it repeatedly. The problem was that small scratches were created on the concrete surface that was poured using metal pry bars, which spoiled the aesthetic appearance of the finished concrete surface.

Solution The present invention was made in view of the above circumstances, and its gist is that a guide rod has a locking part that can be locked to a concrete formwork panel at one end.
A hammer having a through hole is loosely fitted to be movable along the guide rod, and the other end of the guide rod is provided with a protruding collision part for the hammer to collide with. By instantly releasing the formwork panel by the impact force of the hammer of the mold release device, there is no adverse effect on the poured concrete surface, and the expensive metal formwork panel can be removed. This allows for repeated use. Examples will be described in detail below with reference to the drawings.

FIG. 1 shows an embodiment of the mold release device for concrete formwork according to the present invention.
It has a letter-shaped locking part 3, and a disc-shaped collision part 4 at the other end.
It consists of a guide rod 2 made of a steel round bar having a diameter, and an iron hammer 1 fitted movably along the guide rod 2. cylindrical portions 1b and 1c having substantially the same diameter,
A small-diameter handle portion 1a sandwiched between the cylindrical portions 1b and 1c is integrally provided, and a through hole 5 bored along the central axis of the handle portion 1a or the guide rod 2
It is configured so that it can be moved between the locking part 3 and the collision part 4 along the guide rod by being loosely fitted into the guide rod. To explain how to use the present device, for example, as shown in Fig. 2,
Holes 13, 13, for formwork joining fittings (for example, U-clips) 12 provided on the rising edge 11 of the steel formwork panel (so-called metal platform) 10.
..., or the U-shaped locking portion 3 is inserted into the through holes 15, 15, etc. provided in the rib 14 of the metal platform 10 and latched. Next, handle part 1 of hammer 1
a, and rapidly slide the hammer 1 along the guide rod 2 in the direction of detachment of the formwork 10. When the collision part 4 is hit with the hammer 1, the force applied to the collision part 4 is released. By applying a strong impact force to the formwork 10 through the guide rod, the formwork is very easily separated from the concrete casting body.

FIG. 3 shows another embodiment of the present invention, in which a cylindrical hammer 21 with a through hole in the center is provided with a flat inverted U-shaped handle 21a, and the central axis of the hammer 21 is provided with a flat inverted U-shaped handle 21a. The through hole provided along the line is formed into a stepped shape by expanding its diameter near one end, and a recess 25 is formed in which a guide for passing through the through hole is formed. stick 2
The diameter of the recess 25 is determined so that a flange-shaped collision part 24 provided at one end of the recess 25 can be fitted therein. Further, a flexible member 26 such as a wire is fixed to the other end of the guide rod 22, and the other end of the wire has a hook-shaped member for hooking and locking onto the mold or the like. A locking portion 23 is attached thereto. In this case, the flexible strip 26 allows the locking portion 2 to
The length from 3 to the collision part 24 can be extended without increasing the weight too much, so if the mold is a large one and it is dangerous for the worker to fall down when releasing the mold, you can work from a distance. This is advantageous because it allows you to
Moreover, since the collision part 24 fits into the enlarged diameter part 25 of the through hole of the hammer 21 at the time of collision, it is unlikely that the worker's cuffs will be caught. The shape of the hammer is not limited to the above example, and may be any shape as long as it can generate the necessary impact force.

Effect: If the mold release device for concrete, etc. according to the present invention is manufactured with a total weight in the range of approximately 3 to 8 kg, almost all mold removal work can be done using the device of the present invention with one hand. This can be easily done by operating. Therefore, the removal work is safe and easy even when working at heights, in places with poor footing, or in narrow places such as underground construction. In addition, when removing the formwork, there is no damage or deformation to the formwork itself, making it possible to use the formwork repeatedly over a long period of time, and preventing damage to the surface of the concrete molded product. It has the great advantage of not having any negative effects.

[Brief explanation of drawings]

FIG. 1 is a partially exploded front view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing how to use the mold release device of the present invention shown in FIG. FIG. 3 is a partially omitted partial sectional view showing another embodiment of the present invention.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A hammer having a through hole is freely movable along a guide rod having a locking portion at one end for locking to a concrete formwork panel. A concrete form mold release device, which is fitted into the guide rod and has a collision portion protruding from the other end of the guide rod for collision with the hammer. (2) The mold release device according to claim 1, wherein the locking portion is provided at one end of the guide rod via a flexible strip.