WO2007072572A1

WO2007072572A1 - Tool for removing end of separator fitting

Info

Publication number: WO2007072572A1
Application number: PCT/JP2005/023683
Authority: WO
Inventors: Nobuyuki Aoyama
Original assignee: Aoyama Shaft Co., Ltd
Priority date: 2005-12-22
Filing date: 2005-12-22
Publication date: 2007-06-28

Abstract

[PROBLEMS] A tool for safely and efficiently removing an end of a separator fitting which end projects from a concrete structure after a frame is dismantled. [MEANS FOR SOLVING PROBLEMS] The tool has a bar-like member (2) having a fitting hole (5) that is formed in an end face of one end of the member, the fitting hole (5) being capable of engaging with an end (13a) of the separator fitting (13); a female screw member (3) fixed to the end on the opposite side of the end where the fitting hole (5) of the bar-like member is formed and having formed in it a female screw (7a) in the direction perpendicular to the bar-like member (2); and a male screw member (4) having a male screw (4a) that is formed on the outer periphery of the male screw member and screwed into the female screw (7a) of the female screw member and also having a rotation operation section (8) that is formed on one end of the male screw member and is capable of being co-rotatably connected to a rotating section (11a) of an electric motor (11) for tightening a tightening fitting. The rotation operation section (8) of the male screw member (4) is rotated by the rotating section (11a) of the electric motor (11) with the end (13a) of the separator fitting (13) fitted in the fitting hole (5).

Description

Specification

Separator bracket end removal tool

Technical field

[0001] The present invention relates to a separator end removal tool for removing an end portion of a separator metal fitting protruding from a concrete structure after formwork dismantling.

Background art

[0002] A formwork for a concrete structure is constructed by connecting formwork panels at positions facing each other with a separator fitting. After the concrete structure is completed and the formwork is dismantled, both ends of the separator metal are left protruding from the concrete structure. The protruding end of this separator metal fitting needs to be removed because it interferes with subsequent exterior construction work. Conventionally, the protruding end of the separator metal fitting has been removed by hammering it with a hammer. On the other hand, although a technique related to a separator in which a folding groove is provided in the separator itself to easily break the end portion (see Patent Document 1), even if such a technique is used, the projecting end portion is eventually used. There is no change in that it must be removed by tapping with a hammer.

Patent Document 1: JP-A-11-210226

Disclosure of the invention

Problems to be solved by the invention

[0003] The method of removing by smashing with a hammer or the like may cause the end of the slashed separator bracket to fly in an unexpected direction, which is extremely dangerous in promoting safety work. In addition, in order to beat the end of the separator bracket, the hammer must be shaken down several times. This work is labor intensive and the work efficiency is poor.

[0004] An object of the present invention is to provide a tool that can safely and efficiently remove an end portion of a separator fitting protruding from a concrete structure after formwork dismantling.

Means for solving the problem

[0005] To solve the above problems, the present invention is configured as follows. That is, the separate according to the present invention. The tool end removal tool is a tool for removing the end of the separator tool protruding from the concrete structure after the formwork is dismantled, and has a fitting hole that can be fitted to the end of the separator bracket. A rod-like member formed by opening the end surface of the rod-like member, and a female screw fixed to the end of the rod-like member opposite to the side where the fitting hole is formed, and in a direction perpendicular to the rod-like member. The formed female screw member and a male screw threadedly engaged with the female screw of the female screw member are formed on the outer peripheral portion, and can be connected to the rotating portion of the fastener tightening electric tool so as to rotate integrally therewith. And a male screw member formed at one end. The above-mentioned electric tool is a tool that many workers always have at work sites where concrete structures are constructed.

[0006] When using this separator end removal tool, the intermediate part of the bar-shaped member of this tool is grasped with one hand, and the fastening tool tightening electric tool is grasped with the other hand, and the following operations are performed.

[0007] First, the end of the separator fitting that holds the rod-shaped member gripped with one hand so that the rotation operation portion of the male screw member is on the upper side and protrudes from the concrete structure into the fitting hole of the rod-shaped member Mate. And the rotation part of an electric tool is connected with the rotation operation part of an external thread member, and the rotation part of an electric tool is rotated in a fastener fastening direction in the state. As a result, the male screw member is screwed into the female screw member, and accordingly, an axial load of the male screw member, that is, a downward load is applied from the male screw member to the female screw member. With this load, the rod-shaped member rotates downward with the end on the opening side of the fitting hole as a fulcrum against the force of holding the rod-shaped member by grasping with one hand, and the rod-shaped member Bending force acts on the end of the separator fitting that fits into the fitting hole. Since this bending force acts intensively on the root portion at the protruding end portion of the separator metal fitting, a strong stress is generated at the base portion, and the separator metal fitting is bent at the base portion and the tip side is divided. The end of the divided separator stays in the fitting hole and does not fly around.

[0008] After the separation metal end removal work is completed, if the rotating part of the electric tool is rotated in the direction opposite to the fastening direction of the fastener, the screwing position between the female screw member and the male screw member is returned to the original state before the work starts. Can be returned.

In the separator end removal tool of the present invention, the male screw member is removed from the female screw member. If the male screw member is provided with a retainer that restricts cutting, the rotating part of the electric tool is turned when the rotating part of the electric tool is tightened in the direction of fastening the fastener when removing the end of the separating metal part, and after the end of the separating metal part end. When the screw is rotated in the direction opposite to the fastening direction of the fastener, the male screw member does not fall from the female screw member.

The invention's effect

[0010] The separator edge removal tool according to the present invention can be used safely in combination with a power tool that many workers regularly use at a construction site where a concrete structure is constructed. In addition, it is possible to remove the end of the separator fitting protruding from the concrete structure after the formwork dismantling. In addition, since the tool is light in weight, it can reduce the fatigue level of the operator, which can contribute to an improvement in work efficiency.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described based on examples shown in the drawings.

Example

FIG. 1 is a diagram showing an embodiment of the present invention, and this separator end removal tool 1 includes a rod-shaped member 2, a female screw member 3, and a male screw member 4.

[0013] The rod-shaped member 2 is a member in which a fitting hole that can be fitted to the end of the separator metal fitting is formed at one end to open to the end face. In this embodiment, a steel pipe is used. Is used, and one end (left end in the figure) of the nove hole is the fitting hole 5. The length of the rod-like member 2 is not particularly defined, but it is easy to handle it around 50 cm. Further, the inner diameter of the fitting hole 5 is preferably about 15 mm, for example, so that the end of the separator fitting is fitted with a slight margin so that the fitting work of the separator fitting is easy. The end of the fitting hole 5 side is quenched to improve hardness.

[0014] The female screw member 3 is formed by integrally fixing a nut 7 to a flat plate 6 having a communication hole 6a so that the center of the communication hole 6a and the center of the screw hole 7a are aligned. The female screw member 3 is fixed to the end portion of the rod-like member 2 opposite to the fitting hole 5 by welding at the flat plate 6 portion. A screw hole (female screw) 7 a of the nut 7 faces a direction orthogonal to the rod-shaped member 2.

[0015] The male screw member 4 is a rod-like member having a male screw 4a screwed with the female screw 7a of the female screw member 3 formed on the outer peripheral portion, and at one end thereof, a rotary operation portion 8 processed into a hexagon. Formed It is. The rotation operation unit 8 is quenched. Also, hook-shaped retainers 9 and 10 are provided at both ends of the range where the male screw 4a is formed. The rotation operation unit 8 may be processed into a square or a circle.

[0016] Next, a method of using the separator bracket end removing device 1 will be described. Fig. 2 is a diagram showing the usage situation, with one hand grasping the middle part of the rod-shaped member 2 of the separator end removal tool 1 and the other hand holding the power tool 11 for fastening fasteners. Do. The power tool 11 is used for tightening fasteners such as bolts, nuts, screws, etc., and is often used by many workers at work sites where concrete structures are constructed. is there.

[0017] When removing the separator bracket end, first, the rod-shaped member 2 is held so that the rotary operation portion 8 of the male screw member 4 is on the upper side, and the concrete structure 12 force is inserted into the fitting hole 5 of the rod-shaped member 2. Then, the protruding end portion 13a of the separator fitting 13 is fitted. Then, the rotating part 11a of the electric tool 11 is connected to the rotation operating part 8 of the male screw member 4, and in this state, the rotating part 11a of the electric tool 11 is rotated in the fastening direction (FIG. 2).

As a result, the male screw member 4 is screwed into the female screw member 3, and accordingly, an axial load of the male screw member 4, that is, a downward load is applied to the female screw member 3. With this load, the rod-like member 2 is piled up with a force that is held by the one hand and supports the rod-like member 2, and the rod-like member 2 rotates downward with the end on the side where the fitting hole 5 is opened as a fulcrum. A bending force acts on the end portion 13a of the separator fitting 13 fitted in the fitting hole 5 of the rod-like member 2. This bending force acts intensively on the root portion of the protruding end portion 13a of the separator bracket 13, so that a strong stress is generated at the root portion, and the separator bracket 13 is bent at the root portion and the tip side is divided. Is done. Since the separated end 13a of the separator 13 stays in the fitting hole 5 of the rod-shaped member 2, it does not fly around and is safe.

[0019] After the end of the separate metal fitting end removal operation, if the rotating portion 11a of the electric tool 11 is rotated in the direction opposite to the fastening direction of the fastener, the screwed position between the female screw member 3 and the male screw member 4 is started. It can be restored to its previous original state. Since the male screw member 4 is provided with the retaining members 9 and 10, the male screw member 4 is not received from the female screw member 3 during the removal of the separate metal fitting end and during the restoration work. Industrial applicability

[0020] In the above embodiment, a pipe is used as a rod-shaped member. However, a fitting hole may be formed at one end of a solid rod material to form a rod-shaped member. In addition, the fastener tightening power tool may be of the type that operates with air.

Brief Description of Drawings

FIG. 1 is an overall view of a separator end removal tool.

FIG. 2 is a diagram showing a usage state of a separator end removal tool.

Explanation of symbols

[0022] 1 Separator end removal tool

2 Bar-shaped member

3 Female thread member

4 Male thread member

4a Female thread

5 Mating hole

6 flat plate

6a Communication hole

7 Nut

7a Female thread

8 Rotation operation part

9, 10 Retaining

11 Electric tool for fastening fasteners

11a Rotating part

12 Concrete structures

13 Separator bracket

13a End of separator bracket

Claims

The scope of the claims

[1] A tool for removing an end portion of a separator metal fitting protruding from a concrete structure after formwork dismantling, and a fitting hole that can be fitted to the end portion of the separator metal fitting is provided at one end portion. A rod-shaped member that is open at the end face, and a female screw that is fixed to the end of the rod-shaped member opposite to the side on which the fitting hole is formed and has a female screw in a direction perpendicular to the rod-shaped member. And a rotation operating portion that is connectable to the rotating portion of the electric power tool for fastening the fastener so as to rotate integrally therewith. A separator end removal tool comprising: a male screw member formed on the portion.

[2] The separator end removal tool according to [1], wherein the male screw member is provided with a retaining member for restricting the male screw member from slipping out of the female screw member.