JPH0868204A - Method and jig for removing sheath pipe for extending-through form separator - Google Patents

Abstract

PURPOSE: To provide a removing jig which is constituted to reliably and simply draw out a sheath pipe to the inside of a building by a method wherein a cylindrical weight is loosely fitted in a bolt having a tip joined in a screwed-in state with a sheath pipe in the inner surface of which a screw is formed. CONSTITUTION: A cylindrical weight 9 made of a metal is loosely fitted in a bolt 8 provided at a tip with a screw part 7 joined in a screwed-in manner with a screw 6 of a sheath pipe 4. A screw part 7 of the tip of a bolt 8 with a weight 9 is screwed in the sheath pipe 4, buried in an outer wall 1, by a given length, and the bolt 8 is set in the sheath pipe 4 from the indoor side. The weight 9 is then hammered by a hammer and when the weight 9 is struck on a head 8a of the bolt 8 on the opposite side to the sheath pipe 4, the sheath pipe 4 is gradually pulled out through the bolt 8 by means of an impact force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a penetrating hole of a form separator and a pipe, and a jig.

[0002]

2. Description of the Related Art As shown in FIG. 4, a large-paneled formwork 2 may be used in the construction of an outer wall 1 of a construction work.

It is well known that the large-sized panelized mold 2 requires a small number of separators 3 of the mold because the edge material has a high rigidity, so that the labor of assembling / demolding can be saved. On the street. Moreover, since the number of separators 3 is small, the separators 3 must have a large diameter to withstand the required lateral pressure of concrete.

If such a large-diameter separator 3 is left in the body in a state where it is driven into the wall surface, regardless of whether the projecting portion from the concrete surface of the wall is cut off or not, not to mention the outer wall. Also, it is not preferable for the inner wall.

Therefore, the large-diameter separator 3 is usually removed, and a sheath pipe 4 made of vinyl chloride or the like is set to cut the edge of the wall concrete.

Although the sheath pipe 4 made of vinyl chloride or the like is disinfected, the end portion of the sheath pipe 4 cannot be exposed on the wall surface even when burying is allowed, and a cone is placed on the concrete surface of the wall. A method is used in which the penetrating portion is recessed by using it, the inside of the sheath tube 4 is filled with mortar, and the concave portion on the surface is also filled with mortar or the like.

Further, depending on the use, burying may not be recognized, and at that time, it must be removed. As shown in FIGS. 5 and 6, this removal is performed by a method in which a yatco 5 having the same diameter as the sheath tube 4 is applied from the surface, hit with a hammer, and pulled out to the opposite side of the outer wall 1.

[0008]

However, in this method, the sheath pipe 4 made of vinyl chloride or the like may be damaged by the impact, and as a result, the sheath pipe 4 cannot be removed.

If the inner wall is good, but the outer wall has no scaffold outside, it is dangerous because the sheath tube 4 will fall out and fall when hit from the inside of the building. on the other hand,
Since there is no scaffolding, it cannot be hit from outside the building.

An object of the present invention is to solve the above-mentioned inconveniences and provide a method and a jig for removing a penetrating case of a formwork separator and a pipe that can be reliably and easily pulled out to the inside of a building. It is in.

[0011]

In order to achieve the above object, the present invention provides a method for penetrating a form separator or removing a pipe by forming a screw on an inner peripheral surface of the sheath pipe and screwing the screw into the screw. Screw the tip of a bolt with a weight into the pod, hit the weight against the head of the bolt on the side opposite to the pod, and use the impact force to pull the pod out through the bolt, and the formwork As a separator penetrating pipe and a pipe removal jig, a bolt with a screw thread formed on the inner peripheral surface and the tip of which is screwed into the sheath, and the gist of which is to loosely fit a tubular weight into this bolt Is.

[0012]

According to the present invention, the weight can be struck against the head of the bolt on the side opposite to the pod and the impact force can be used to gradually pull out the pod from the inside of the building. This can be pulled out into the building by connecting it to a pipe.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2 are vertical side views showing a method for removing a penetrating hole of a form separator and a pipe of the present invention. As in FIGS. 5 and 6 showing the conventional example, 1 in the drawing is an outer wall and 4 is an outer wall. It is a sheath tube for penetration of the form separator set by construction.

The sheath tube 4 is formed of vinyl chloride or the like, but in the present invention, the screw 6 is formed on the inner peripheral surface of the sheath tube 4. The screw 6 may be formed over the front length of the sheath tube 4, but may be formed with about 10 threads from the end as shown in the figure.

Furthermore, if screws 6 are formed on the sheath pipe 4 in advance, they may be crushed during concrete pouring. Therefore, the screws 6 may be cut after the sheath pipe 4 is embedded in concrete.

As shown in FIG. 3, the jig for penetrating the mold separator of the present invention and the jig for removing the pipe are provided with a bolt 8 having a threaded portion 7 which is screwed into the screw 6 of the sheath 4 at the tip thereof. A metal weight 9 having a shape of a circle was loosely fitted.

The length and thickness of the weight 9 are not particularly limited, but the length is naturally shorter than the length of the bolt 8,
The inner diameter is smaller than that of the head 8a of the bolt 8.

As shown in FIG. 1, the sheath tube is removed by screwing a predetermined length of a screw portion 7 at the tip of a bolt 8 with a weight 9 into a sheath tube 4 embedded in the outer wall 1. Set bolt 8 to 4 from the indoor side.

Then, hit the weight 9 with a hammer or the like,
When the weight 9 is struck against the head 8a of the bolt 8 on the side opposite to the sheath tube 4, the impact force exerts the force on the bolt 8 as shown in FIG.
The sheath tube 4 can be gradually pulled out via the.

In the above-mentioned embodiment, the case where the sheath tube 4 is embedded in the outer wall 1 has been described. However, if this is the inner wall,
The present invention can be used for embedding the sheath pipe 4 for penetrating the form separator, regardless of other concrete frames.

[0021]

As described above, the method for removing the penetrating case and the pipe of the form separator and the removing jig of the present invention can surely and easily pull out the inside of the building.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a first embodiment of a method for removing a sheath and a pipe of a form separator of the present invention before removing the sheath.

FIG. 2 is a vertical cross-sectional side view showing a state in which a sheath tube is pulled out, showing an embodiment of a method for removing a sheath and a tube of a form separator of the present invention.

FIG. 3 is a perspective view showing an embodiment of a jig for removing a sheath and a pipe of a form separator of the present invention.

FIG. 4 is a side view showing an example of construction with a large-paneled formwork.

FIG. 5 is a vertical sectional side view showing a conventional example before pulling out a sheath tube.

FIG. 6 is a vertical cross-sectional side view showing a state in which a sheath is pulled out showing a conventional example.

[Explanation of symbols]

1 ... Outer wall 2 ... Large-sized panel form 3 ... Separator 4 ... Sheath tube 5 ... Yatco 6 ... Screw 7 ... Screw part 8 ... Bolt 8a ... Head 9 ... Weight

Claims (2)

[Claims] 1. A screw is formed on the inner peripheral surface of a pod, and the tip of a bolt with a weight that is screwed with this screw is screwed into the pod, and the weight is driven to the head of the bolt on the side opposite to the pod. A method for penetrating a formwork separator and removing a pipe, which is characterized by applying the impact force and gradually pulling out the sheath via a bolt. 2. A bolt for which a tip is screwed into a sheath tube having a screw formed on an inner peripheral surface thereof, and a cylindrical weight is loosely fitted to the bolt. Removal jig.