JP3184037U - Formwork puller wrench - Google Patents

Abstract

An object of the present invention is to not only facilitate removal of a torsion-type formwork separator from a solid concrete but also to facilitate removal of the receiver, which greatly improves work efficiency. Provide a wrench that can.
A parallel threaded portion 2 having a diameter slightly larger than the diameter of a cylindrical hole of a poly-cylindrical receiver is formed at the center, one end of which forms a rod shape 1 that can be held by a chuck of an electric drill, and the other end is a parallel threaded portion. Is formed into a rod shape that comes into contact with the cut surface of the separator when it is screwed to a certain depth into the hole of the poly-cylindrical receiver.
[Selection] Figure 1

Description

  The present invention relates to a tool for removing a formwork holder of a reinforced concrete formwork separator.

Conventionally, a separator for a formwork in a reinforced concrete structure is set with a formwork holder for abutting the formwork and retaining the formwork in a predetermined position, and the receiver also secures a cover thickness of the rebar. In addition, the concrete is solidified and finally removed, and the resulting pores are filled with mortar resin.
Various materials, shapes, and dimensions are available for the receiver depending on the application, but the present invention is a wrench for pulling out and removing a poly cylindrical receiver of a torsion-type separator. About.

Since the above-mentioned poly cylindrical holder is not provided with a draft angle over its entire length unlike a so-called form holder such as P-con and iron-con, it does not have a threaded portion for attachment / detachment, so it is concrete. Removal after solidification is difficult and difficult.
The removal method of the receiving tool currently performed is that a tool having a steel bar-like part having a diameter of a wood screw slightly larger than the hole diameter of the cylindrical part of the receiving tool is embedded in the solidified concrete. The hole of the receiving tool, that is, the hole formed after the separator is removed by twisting, is inserted to a certain depth, and when the thread has sufficiently penetrated, it is pulled out by force and removed. However, it takes time and effort to remove the support from the tool due to the residual pressure when it was bitten.

  As a result of diligent research, the present inventors have succeeded in developing a pulling wrench for a poly-cylindrical receiver that can be attached to a chuck of an electric drill.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an image diagram of a wrench according to the present invention.
Here, reference numeral 1 is a portion that can be held by the chuck of the electric drill, reference numeral 2 is a threaded portion integrated with reference numeral 1, and the outer diameter of the thread is slightly larger than the inner diameter of the poly-cylindrical receiver, and the wrench is received. It is designed so that about half of the screw thread bites into the plastic cylindrical receiver when screwed into the tool. This is because it takes a lot of time to remove the receiver from the wrench if it is bitten into the receiver so that all the threads are hidden as described above.
Reference numeral 3 is a round bar integral with reference numerals 1 and 2, and the outer diameter of the round bar is slightly smaller than the inner diameter of the poly cylindrical holder. The length of the round bar is designed so that the tip of the round bar hits the twisted cut surface of the separator when the threaded part 2 is cut into the poly-cylindrical receiver by about 5 to 30 mm. ing.
FIG. 2 is an image diagram of a wrench used when the tight contact between the poly-cylindrical receiver and the solidified concrete is remarkable and the wrench of FIG. 1 cannot be pulled out. Reference numeral 1a is given to the chuck of the electric drill. The portion, reference numeral 2a, is subjected to the same processing as the coach bolt having a large thread pitch to the tip.

FIGS. 3 (a) to 3 (e) show the process from when the separator corresponding to the cover thickness of the reinforcing bar is twisted off until the poly cylindrical holder is removed using the wrench of FIG. It is sectional drawing.
Here, (a) is a state in which the separator 6 corresponding to the cover thickness has been cut and removed. Reference numeral 5 denotes a separator that remains embedded in the concrete, reference numeral 8 denotes a cut surface, and reference numeral 4 denotes a poly cylindrical receiver. The tool 7 is a washer for preventing the sign 4 from retreating when the mold panel is tightened from the outside, and the sign 10 is solidified concrete. In (b), the wrench according to the present invention is set on the chuck 9 of the electric drill, and is pushed in the direction of the arrow when the extraction work of reference numeral 4 starts. (C) is a view when the threaded portion 2 is in contact with the outer surface of the poly-cylindrical receiver 4. At this time, the tip portion of the reference numeral 3 is not yet in contact with the cut surface 8. When the electric drill is rotated from the state shown in FIG. 2C, the wrench threaded portion 2 reaches the cutting surface 8 while the wrench threaded portion 2 bites into the support 4 about half the height of the thread as described above. And the state shown in FIG. When the wrench is further rotated, the wrench cannot be advanced to the back, so that the receiver 4 is auctioned and the state shown in FIG. In the wrench of FIG. 2, the operations (a) to (e) are the same.

  The use of the wrench according to the present invention not only facilitates the removal of the torsion-type formwork separator from the solid concrete but also the removal of the receiver from the wrench. It becomes easy and work efficiency improves greatly.

  Image of wrench   Image of wrench with coach bolt processing   (A) Cross-sectional view of the state where the cover equivalent part of the separator has been removed (b) Cross-sectional view of the state immediately before the pulling work (c) The threaded portion of the wrench is made of poly Sectional view in a state in contact with the outer surface of the tubular receiver (d) Sectional view in a state in which the tip of the wrench reaches the cut surface of the separator (e) Sectional view in a state in which the poly cylindrical receiver is being pulled out

When the wrench according to the present invention set in the chuck of the electric drill is inserted into the hole of the poly-cylindrical holder that appears when the cover equivalent part of the torsion type separator is removed, the wrench of the wrench is inserted. When the tip reaches the cut surface of the separator, the poly-cylindrical receiver is auctioned, so when it a little auctioned, if it stops as it is or if it stops pulling the electric drill and pulled out, it is made of poly that was easily embedded in solidified concrete The cylindrical receiver can be removed.
Thereafter, the holder can be easily removed from the wrench by grasping the poly-cylindrical holder and setting the rotation direction changeover switch of the electric drill to the reverse direction and rotating it.

  The wrench according to the present invention can very efficiently remove the torsion-type separator from the solid concrete and then remove the holder from the wrench, resulting in a significant cost. It is thought that the industrial utility value is great because it is down.

1, the part that can be held by the chuck of the electric drill 1a, the part that can be held by the chuck of the electric drill 2, the inch screw machining part 2a, the coach bolt screw machining part 3, the biting restriction part of the screw machining part 4, the poly cylindrical holder 5, Separator remaining part 6, Separator removal part 7, Stopper washer 8, Cutting surface 9, Electric drill chuck 10, Solidified concrete

Claims (2)

A wrench for pulling out a poly-cylindrical receiver used for a torsion-type separator from solidified concrete, and about half of the height of the rod-shaped portion and screw thread held by the chuck of the electric drill A threaded portion machined so as to bite into the inner surface of the cylindrical hole, and a rod-shaped portion for restricting further screwing when the threaded portion is screwed into the above-mentioned fixture in a range of 5 to 30 mm; A steel tool consisting of three parts. A wrench in which the threaded portion is processed to the tip by the same processing as a coach bolt having a large thread pitch.

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