JPH0547791Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is suitable for use on sloped slopes facing expressways and various facilities created using the open cut construction method, etc., or slopes such as steep slopes that are at risk of collapse. This invention relates to a bending tool for forming a bent part for a corbel on the edge of a side plate of a formwork used when creating a protection work.

[Conventional technology]

The conventional formwork used when constructing slope protection works is
As shown in Figures 1 and 2, a pair of left and right side plates 1 made of cardboard, metal lath, clamp wire mesh, etc.
and a connecting frame 2 that connects the both side plates 1.

The above-mentioned connecting frame 2 is fixed by welding or other means by placing a long horizontal bar 4 made of a steel rod along the lower side of an upwardly U-shaped lower horizontal reinforcement 3 called a lower stirrup. Short horizontal bars 5 made of steel rods are integrally fixed to both upper ends of the horizontal reinforcements 3 by means such as welding.

The outer ends of each horizontal bar 4, 5 protrude from both sides of the lower horizontal bar 3 and are rotatably engaged with the side panel 1 as connecting parts 6.

The rotatable connecting portion 6 may be bent into a ring shape and rotatably engaged with the vertical wire forming the side plate 1, or may be formed by penetrating the side plate 1 through the ring portion. Any structure may be used, such as driving a retaining member into the annular portion.

In addition, the above upper horizontal bar 5 is separate for left and right,
The inner ends of the left and right diagonal bars 8 made of the same material as the upper horizontal bar 5 are arranged to face each other with a gap between them so that a slight opening 7 is formed, and both ends of the left and right diagonal bars 8 made of the same material as the upper horizontal bar 5 are connected to the inner ends of the upper horizontal bar 5 and the lower horizontal bars 3 Fixed by welding or other means to the middle part of both sides.

The formwork A configured as described above is carried to the site and installed vertically and horizontally, and the opposing ends are brought together.

At this time, the haunch-forming bent portions 1' provided at the ends of both side plates 1 are overlapped.

[The problem that the idea attempts to solve]

When forming the bent portion for the haunch at the end of the side plate, the bent portion must be bent by hand, which is extremely time consuming and causes fatigue to the hands.

In addition, since it is bent by hand, there are problems such as the protruding length of the bent portion becoming uneven or the bending line not being perpendicular to the upper and lower edges of the side plate.

The object of this invention is to provide a bending tool that can be bent extremely easily.

[Means to solve the problem]

In order to achieve the above object, this invention has a shaft member with a handle at the end, a length that fits the entire width of the side plate of the formwork from the tip end face to the end face of the shaft member, and It is composed of notches provided so that both sides of the outer circumference are open.

[Effect]

Insert the full width of the bent end of the side plate into the notch.

Thereafter, while rotating the shaft member by a predetermined angle using the gripped handle, the end portion of the side plate is bent so as to protrude diagonally outward to form a bent portion.

〔Example〕

Embodiments of this invention will be described below with reference to the accompanying drawings.

In FIG. 3, 31 is a bending tool.

The above-mentioned bending tool 31 has a shaft member 33 having a handle 32 at the end thereof, and a length such that the entire width of the side plate constituting the formwork is fitted from the tip end face of the shaft member 33 toward the end portion. It consists of a notch 34 provided so that both sides of the outer periphery thereof are open.

The above-mentioned formwork A is composed of a pair of left and right side plates 1 made of cardboard, metal lath, clamp wire mesh, etc., as shown in Figs. 1 and 2, and a connecting frame 2 that connects the side plates 1. It is.

The above-mentioned connecting frame 2 is fixed by welding or other means by placing a long horizontal bar 4 made of a steel rod along the lower side of an upwardly U-shaped lower horizontal reinforcement 3 called a lower stirrup. Short horizontal bars 5 made of steel rods are integrally fixed to both upper ends of the horizontal reinforcements 3 by means such as welding.

The outer ends of each of the horizontal bars 4 and 5 are made to protrude from both sides of the lower horizontal reinforcement 3 and are rotatably engaged with the side plate 1 as a connecting portion 6.

The rotatable connecting portion 6 may be bent into a ring shape and rotatably engaged with the vertical wire rod constituting the side plate 1, or may be formed by penetrating the ring portion into the side plate 1. Any structure may be used, such as driving a retaining member into the annular portion.

In addition, the above upper horizontal bar 5 is separate for left and right,
The inner ends of the left and right diagonal bars 8 made of the same material as the horizontal bar 5 are arranged to face each other with an interval such that a slight opening 7 is formed, and both ends of the left and right diagonal bars 8 made of the same material as the horizontal bar 5 are connected to the inner ends of the upper horizontal bar 5 and the lower horizontal bar 3. Fixed by welding or other means to the middle part of both sides.

Next, a method of bending the side plate 1 using the bending tool 31 will be explained.

First, insert the entire width of the end of the side plate 1 into the notch 34.

After that, the shaft member 33 is removed by the gripped handle 32.
When the side plate 1 is rotated by a predetermined angle clockwise in FIG. 4, the end of the side plate 1 is bent as shown by the solid line in FIG. 4 to form a bent 1' for the haunch.

Note that after bending, the bending tool 31 is removed.

The formwork A in which the bent part 1' for the corbel was formed is:
As shown in Figure 5, they are brought to the site and installed vertically and horizontally.

After the formwork A is installed, a plurality of lower main reinforcing bars 21 are inserted through the opening 7 and placed on the bottom of the lower horizontal bar 3 at appropriate intervals, and a plurality of upper main reinforcing bars 22 are placed on the upper horizontal bar 5. Deploy.

Thereafter, a plurality of downward U-shaped upper horizontal reinforcements 23 called upper stirrups are installed so that both sides thereof are outside of the upper main reinforcing bars 22 on both sides and overlap with both sides of each lower horizontal reinforcement 3.

After that, concrete is poured into the formwork A.

〔effect〕

As described above, by using the bending tool according to this invention, a bent part for a corbel can be obtained extremely easily and quickly at the end of a side plate.

Moreover, the bending line of the bending part is perpendicular to the upper and lower edges of the side plate, and the protruding length of each part of the bending part can be made uniform.

[Brief description of the drawings]

Fig. 1 is a perspective view of the formwork according to this invention, Fig. 2 is a longitudinal sectional front view of the reinforced state, Fig. 3 is a perspective view of the bending tool, and Fig. 4 is a plan view showing the bending tool in use. , FIG. 5 is a plan view showing the formwork installed. 31...Bending tool, 32...Handle, 33...
Shaft material, 34...notch.

Claims (1)

[Scope of utility model registration request] Consists of a shaft member with a handle at the end, and a notch that is long enough to fit the full width of the side plate of the formwork from the tip end face of the shaft member to the end face, and is made so that both sides of the outer periphery of the shaft member are open. Side plate bending tool for formwork for slope protection work.