JPH0431400Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a trowel.

[Conventional technology]

In multi-story RC buildings, a construction method is usually used in which concrete is poured layer by layer on each floor, resulting in horizontal pour joints on the upper surface of the floor slab. Then, a joint joint is formed in the frame at this joint portion to be filled with a sealing material to prevent water from entering from the outside. Conventionally, this pouring joint was
It was formed as follows. In other words, concrete for the lower floor is cast using a wall formwork with a joint bar attached to the inside near the upper end, and after the wall formwork is removed, the joint bar fits into the notch where the joint bar remains. Concrete for the upper floor was cast using a wall formwork attached near the bottom edge, and by removing the wall formwork, a concrete joint was formed using the groove where the joint bar remained (Reference ).

[Problem that the invention attempts to solve]

However, when forming concrete joints as described above, the joint rods are usually thin and are simply nailed to the wall formwork, so when concrete is poured,
The joint bar tends to deviate from its straight state and wave in the longitudinal direction due to pressure from flowing concrete or contact with a protrusion bar or vibrator. Moreover, since molding is performed using a joint rod, the joint surface is likely to be chipped during removal from the mold, there will be short plates due to insufficient wraparound of the concrete, and pinholes will occur due to air entrainment. As a result, there was a problem that poor finishing of the joints was likely to occur.

In particular, when the exterior walls are finished with exposed concrete, the finishing accuracy of the joints is important for aesthetics, so it is necessary to avoid the problems described above as much as possible, and a great deal of effort is required for construction management. It was something to spend.

In view of the above-mentioned circumstances, an object of the present invention is to provide a trowel that is useful for forming a soldering joint with high accuracy.

[Means for solving problems]

The characteristic structure of the joint presser trowel according to the present invention is as follows:
A first guide member that is slidably placed on the top surface of the wall formwork and positioned in the vertical direction is integrally connected to a presser member for finishing the lower surface of the pouring joint, and the first guide member is Further, a second guide member slidably abuts on the outer surface of the wall formwork to be positioned in the inner and outer directions is integrally provided, and a handle is attached thereto.

[Effect]

In other words, by trowel-finishing the upper surface of the poured concrete, which will be the bottom surface of the pour joint, before the poured concrete on the lower floor hardens, it is possible to obtain a basement surface of the pour joint without pinholes or slabs. The first guide member is placed on the top surface of the wall formwork, and the second guide member is slid along the top side of the wall formwork with the second guide member in contact with the outer surface of the wall formwork. By moving the wall formwork itself as a ruler, the holding member for pressing and finishing the top surface of the poured concrete can be accurately moved along a predetermined location in a stable posture, making it easy to operate the trowel. The bottom surface of the joint can be formed with a good finish without waving, pinholes, strips, etc.

〔Effect of the invention〕

As a result, it is easy to use the trowel as a trowel to form the lower surface of the joint joint to a good finish without waving, pinholes, or dowels, and it is easy to use the trowel to form the lower surface of the joint joint. We are now able to provide things that can be done efficiently.

In particular, when the exterior wall is finished with exposed concrete, the finishing accuracy of the pouring joint is important for aesthetics, so the ability to finish the bottom surface of the pouring joint with high precision using the trowel according to the present invention makes construction easier. This is even more useful since it can reduce the amount of effort required for management.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. ₁ and FIG.
A plate-shaped first guide member 1b that is slidably placed on the upper surface 2a of the wall formwork 2 for forming C ₁ and positioned in the vertical direction is integrally provided, and this first
A plate-shaped second guide member 1c, which is slidably abutted on the outer surface 2b of the wall formwork 2 and positioned in the inner-outside direction, is integrally connected to the guide member 1b in a vertically bent downward direction. A handle 1d is provided to constitute a joint presser trowel 1.

The pressing member 1a is connected to the first guide member 1b.
It stands up at a slight inclination angle in the opposite direction to the bending direction of the second guide member 1c, and as shown in FIG. The concrete surface to be press-finished is formed as an inclined surface that is lower toward the outside. Further, a rising member 1e, which functions as a rib for maintaining the flatness of the holding member 1a, is integrally connected to the holding member 1a so as to be bent vertically upward.

The inclined surface to be pressed and finished by the holding member 1a is made of a joint bar 4 made of acrylic polyol coated with two coats of urethane resin and nailed to the wall formwork 3 on the upper floor, as shown in FIG. 2D. When the concrete for the upper floor is placed with the lower surface placed, a pouring joint is formed in the area where the joint bar 4 remains at the removal mark of the wall formwork 3, as shown in Fig. 2E. This is the lower surface Xa of the earth X.

As shown in FIG. 2C, the first guide member 1b is positioned vertically with respect to the wall formwork 2 on the lower floor, and the second guide member 1c is positioned internally and externally at this joint. By sliding the presser trowel along the wall formwork 2 and pressing the lower surface of the joint with the presser member 1a, there is no vertical undulation or internal or external movement, and there is no need to worry about vertical waving or internal/external movement. A well-finished joint joint without pinholes can be formed with simple work.

Next, a method for forming a pouring joint X during concrete pouring, including pressing and finishing the joint surface Xa using the above-mentioned pouring joint presser trowel 1, will be explained.

First, as shown in FIG. 2A, wall formwork 2 is erected inside and outside of the intended location of the exterior wall. At this time, a ruler form 5 whose lower surface 5a is formed into an inclined surface positioned downward toward the outside is removably fixed to the top end of the outer wall form 2A.

Next, as shown in FIG. 2B, concrete C ₁ is poured into the wall formwork 2, and
Pump concrete C ₁ up to a height that reaches the bottom surface of.

And before this concrete C ₁ hardens,
Only the ruler formwork 5 is removed from the wall formwork 2, and the lower surface 5a of the ruler formwork 5 is removed as shown in FIG.
A pressing finish is applied to the joint surface Xa that has been roughly formed by using the above-mentioned joint presser trowel 1.

After the concrete C ₁ has hardened, the wall formwork 2 is removed from the mold, and then, as shown in FIG. The upper floor wall formwork 3 is erected with the joint bar 4 placed on the joint surface Xa, and the upper floor concrete is placed inside the wall formwork 3.
Pour C ₂ . After curing of that concrete C ₂ ,
By demolding the wall formwork 3, a pouring joint X is formed as shown in FIG. 2E.

[Another example]

Next, another embodiment of the present invention will be listed.

<1> As shown in FIG. 3, the holding member 1a may be formed in the same plane as the first guide member 1b, but in order to prevent water from seeping in from the joint X, it is necessary to As explained in
It is preferable that the lower surface Xa is formed into an inclined surface that is located higher toward the back.

<2> In carrying out the present invention, the rising member 1e may be omitted, but if the holding member 1a is plate-shaped, it is better to provide it in order to improve its flatness. Furthermore, instead of or in addition to this, ribs may be provided upright on the upper surface of the presser member 1a.

<3> In the previous embodiment, the structure is such that the height of the outer end of the eye surface Xa formed by directly connecting the first guide member 1b to the presser member 1a is equal to the top end of the wall formwork 2. However, instead of that, as shown in FIG.
and the first guide member 1b, a connecting member 1f along the inner wall of the wall form 2 is interposed so that the height of the outer end of the joint surface Xa to be formed is lower than the top end of the wall form 2. It may be configured as follows. In this case, a wall formwork 2 similar to the ruler formwork 5 described in the previous embodiment is removably used to roughly form the subsurface surface Xa when pouring the concrete _C1 on the lower floor.
You can also attach it to the
After omitting the ruler formwork and pouring concrete _C1 ,
The joint surface Xa may be formed only by pressing the joint presser trowel 1.

<4> The specific structure of the handle 1d can be changed as appropriate, and instead of the wooden one explained in the previous embodiment, as shown in FIG. It may be in the form of a suspended plate.

<5> The materials of the holding member 1a, the first guide member 1b, the second guide member 1c, etc. can be selected as appropriate.
Various metals, various resins, various woods, etc. can be used.

<6> In the previous embodiment, the holding member 1a, the first guide member 1b, and the second guide member 1c were formed by bending plate-like members, but instead of that, as shown in FIG. Alternatively, each of the portions 1a, 1b, and 1c may be formed by integrally molding a block-like member.

<7> The holding member 1a, the first guide member 1b, and the second guide member 1c may be formed from separate members, and they may be integrally connected by fixing means such as bolting or welding.

<8> Both end portions of the lower surface of the holding member 1a in the sliding direction are formed in an inclined position such that the outer side is higher, and the concrete C ₁ accompanying the sliding movement for pressing the lower surface Xa of the pouring joint X is formed. It may be arranged to ensure that the material is transferred to the lower surface of the holding member 1a.

<9> Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the trowel for pressing joints according to the present invention, FIG. 1 is a perspective view, and FIGS. 2A and 2 are cross-sectional views showing the process of forming joints. . 3 and 4 are sectional views corresponding to FIG. 2C showing different embodiments, and FIGS. 5 and 6 are perspective views corresponding to FIG. 1 showing still further embodiments. be. 1a...pressing member, 1b...first guide member,
1c...Second guide member, 1d...Handle, 2...
Wall formwork, X... joint joint, Xa... bottom surface.

Claims (1)

[Scope of utility model registration request] The first guide member 1b is slidably placed on the upper surface of the wall formwork 2 and positioned vertically on the presser member 1a for finishing the lower surface Xa of the joint X.
are integrally connected to the first guide member 1b, and a second guide member 1c is integrally connected to the first guide member 1b, which is slidably abutted on the outer surface of the wall formwork 2 and positioned in the inner and outer directions. A trowel for pressing joints with 1d attached.