JPH07247687A - Cleaning tool for concrete form - Google Patents

Abstract

PURPOSE:To develop a cleaning tool capable of removing a deposit adhering to a concrete form simply, easily and cleanly. CONSTITUTION:A cleaning tool for a concrete form has a scraper 2 fitted to the forward end of a handle 1 for rubbing away a deposit adhering to the surface of the form. The scraper 2 has a scraping plate 5 and a detachable connecting member 7. In this case, the plate 5 is made of steel having elasticity so as to be deformable, when pressed to the concrete form. In addition, the plate 5 has a scraping blade 3 at the front end for scraping a deposit on the form. The member 7 detachably clamps the plate 5 and is connected to the handle 1. Also, a disposable saw is preferably used for the plate 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning tool which cleans a concrete formwork by removing deposits such as concrete and mortar adhered to its surface.

[0002]

2. Description of the Related Art Concrete formwork, commonly called "control panel", is reused many times. Before reuse, it is necessary to cleanly remove deposits such as mortar attached to the surface. This is because the surface of the concrete to be constructed cannot be made into a beautiful smooth surface if the adhered matter is attached.

As cleaning tools for concrete formwork, those shown in FIGS. 1 and 2 (Japanese Utility Model Laid-Open No. 4-16848) are often used. In the cleaning tools shown in these figures, a scraper 2 for scraping off adhering substances is fixed to the tip of a handle 1. The scraper 2 of the cleaning tool shown in FIG. 1 has a metal wire brush 4 fixed to a metal plate having a scraping blade 3, and the scraper 2 of the cleaning tool shown in FIG. The rubbed member is fixed. In the cleaning tool of this structure, the scraping blade 3 is pressed against the surface of the concrete form to scrape off the adhered matter, and then the brush 4 is swept to cleanly remove the adhered matter. The scraping blade 3 has a linear shape along the surface of a flat concrete formwork. Furthermore, it is shaped like a blade so that the adhered matter can be scraped off effectively. Scraping blade 3
Is made of a thick metal plate that does not deform even when pressed so that the whole can be made to follow the surface of the concrete form even when strongly pressed against the surface of the concrete form.

[0004]

The cleaning tool of this structure is
When the scraping blade 3 is new, the attached matter can be effectively removed. However, if the scraping blade 3 becomes worn and the blade becomes round, it becomes impossible to effectively remove the deposit. Then, handle 1
It is necessary to firmly grasp and scrape off the adhering substance by pressing the scraping blade 3 against the concrete formwork with an extremely strong force, which makes it difficult to clean the concrete formwork.

In the cleaning tool having this structure, the scraping blade 3 can be sharply polished so that the deposits on the concrete form can be scraped efficiently again. This means that a very hard metal plate cannot be used for the scraping blade 3. This is because if the scraping blade 3 is made of an extremely hard metal plate, it cannot be easily polished. Therefore, although the scraping blade 3 can be polished, its life is shortened. Especially, since the sand that is the abrasive is mixed in the deposits that adhere to the surface of the concrete formwork,
The scraping blade 3 is easily worn and becomes round. For this reason, in the cleaning tool shown in FIG. 1, it is the actual situation that the scraping blade 3 can efficiently and easily scrape off the deposits on the concrete form.

The present invention was developed for the purpose of solving this drawback. An important object of the present invention is to provide a concrete form cleaning tool that can remove deposits on a concrete form simply and easily and neatly.

[0007]

The cleaning tool for concrete formwork of the present invention has the following constitution in order to achieve the above-mentioned object. The cleaning tool includes a handle 1 and a scraper 2 that is attached to the tip of the handle 1 and scrapes off adhering substances attached to the surface of the concrete formwork.

Further, in the concrete form cleaning tool of the present invention, the scraper 2 comprises the scraping plate 5 and the detachable connecting member 7. The scraping plate 5 is made of an elastic steel plate that elastically deforms when the handle 1 is gripped by the hand and pressed by the concrete formwork. Furthermore, the scraping plate 5 has a scraping blade 3 at the front edge for scraping off adhered substances along the surface of the concrete form. The detachable connecting member 7 detachably attaches the scraping plate 5 to the handle 1. Scraper 2 with this structure
When the scraping blade 3 of the scraping plate 5 is worn, the scraping blade 3 is detached and replaced with a new scraping plate 5 to efficiently remove deposits.

Further, in the concrete form cleaning tool of the present invention, when a disposable saw is used for the scraping plate 5, the saw which is difficult to cut and is difficult to discard is effectively reused. The saw is preferably fixed by sandwiching the sharpened saw teeth in a state of being elastically deformed by the detachable connecting member 7. In the saw sandwiched in the detachable connecting member 7 in this state, the blade elastically presses the detachable connecting member 7 to prevent loosening of the sandwiched portion.

[0010]

In the concrete form cleaning tool of the present invention, the scraping plate 5 is detachably fixed to the handle 1 by the detachable connecting member 7. The scraping plate 5 need not be re-polished and used even if it is worn. The scraping plate 5 on which the scraping blade 3 is worn is removed and replaced with a new one. The scraping plate 5 which is not re-polished can be made of an extremely high steel plate. The scraping plate 5 made of a hard steel plate can significantly reduce the abrasion of the scraping blade 3. Therefore, the scraping plate 5 can efficiently scrape off the deposits on the concrete form over a long period of time.

Further, in the cleaning tool of the present invention, the scraping plate 5 is not a metal plate which is thick and does not deform as in the conventional case.
The scraping plate 5 is a thin steel plate that elastically deforms when the handle 1 is gripped and the scraping blade 3 is pressed against the surface of the concrete form. The scraping plate 5 that is pressed and elastically deformed allows the entire long scraping blade 3 to be in close contact with the concrete form, and can widely remove deposits at one time. In particular, the elastically deformable scraping plate 5 can bring the entire scraping blade 3 into close contact with the surface of the concrete form even if the angle between the handle 1 and the concrete form changes slightly. For this reason, when the handle 1 is gripped by hand and the scraping blade 3 of the scraping plate 5 is moved by lightly pressing the concrete form, the deposits adhering to the surface of the concrete form are neatly removed. It is similar to that when a thin razor blade is pressed against the surface of a top plate such as a desk and moved, foreign matter and the like adhering to the surface of the top plate can be effectively scraped off.

In particular, when a disposable saw is used for the scraping plate 5, the saw which is difficult to discard can be effectively reused and the concrete formwork can be cleaned very efficiently and cleanly. A saw is an indispensable tool at the site of concrete formwork assembly. In recent years, disposable saws have been widely used. Disposable saws do not sharpen the saw blade again when it is no longer available. This is because if it becomes difficult to cut, it will be removed from the handle 1 and replaced with a new saw. Disposable saws do not re-polish, so there is no need to sand them and they are made of very hard steel. This makes it possible to effectively utilize the scraper 2 and realize a feature that the excellent scraping ability is not lost for a long time. Preferably, the opposite back edge provided with the saw blade has sharp corners, as shown in FIG. The cleaning tool of the present invention effectively uses this sharp corner angle for the scraping blade 3. Utilizing the corner angle of the back edge, the saw can be reused even if it is discarded because it is not cut.

More preferably, since the saw is made of a thin steel plate that can be deformed by hand, when this is used as the scraping plate 5 and pressed against the surface of the concrete formwork, the scraping blade 3 is made into the concrete formwork. Adhere closely and efficiently scrape off adhered substances. Also, conveniently, the back edge of the disposable saw is
With almost no exception, it is loosely curved as shown in FIG.
When the curved back edge is used as the scraping blade 3 and pressed against the concrete formwork, the scraping blade 3 evenly adheres to the concrete formwork to efficiently remove deposits.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a concrete form cleaning tool for embodying the technical idea of the present invention, and the present invention does not specify the cleaning tool as the following.

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims column", "action column", and "action column". It is added to the members shown in the section of "Means for Solving the Problems". However, the members shown in the claims are
It is by no means specific to the members of the examples.

The concrete form cleaning tool shown in FIG.
A handle 1 and a scraper 2 attached to the tip of the handle 1 for scraping off adhered substances adhering to the surface of a concrete formwork.
With. The handle 1 is made of wood, metal, or hard plastic, and preferably has a total length of 1 to 2 meters so that the scraper 2 can be pressed by the hand and pressed against the concrete formwork.

The scraper comprises a scraping plate 5 and a detachable connecting member 7 for fixing the scraping plate 5 to the handle 1 in a detachable manner. The scraping plate 5 is made of an elastic steel plate that elastically deforms when the handle 1 is gripped by hand and pressed against the surface of the concrete form. The thickness of the scraping plate 5, which is deformed by holding the handle 1 in hand and pressing it against the concrete formwork, is about 0.5 mm. The scraping plate 5 may have a thickness of, for example, 0.2 to 1 mm, preferably 0.3 to 0.8 mm. The thin scraping plate 5 can scrape off adhered substances efficiently. The thick scraping plate 5 can press the scraping blade 3 against the concrete formwork with a strong force. However, since the scraping plate 5 which is too thin cannot be pressed against the concrete form with a strong force, the hard adhered substances cannot be removed efficiently. On the contrary, since the scraping plate 5 that is too thick does not deform along the surface of the concrete form, it becomes difficult to press the entire scraping blade 3 against the concrete form with a uniform force.

The scraping plate 5 has a scraping blade 3 on the edge thereof. As shown in the sectional view of FIG. 4, the scraping blade 3 has sharp corners 6 on both sides. The sharp corners 6 are formed when the steel plate is cut. The scraping plate 5 made of a steel plate that elastically deforms can widen the scraping blade 3 and press it against the surface of the concrete formwork with a uniform force. Therefore, the horizontal width of the scraping plate 5, that is, the substantial total length (L) of the scraping blade 3 for removing the deposits is set to be about 25 cm. By the way,
In the conventional cleaning tool shown in FIG. 1, the total length of the scraping blade 3 is about 9 cm.
I am trying. The total length of the scraping blade 3 can be 10 to 50 cm, more preferably 15 to 40 cm. The long scraping blade 3 has a feature that it is possible to remove adhered substances over a large area on the surface of the concrete formwork once. The vertical width (W) of the scraping plate 5 is, for example, 3 to 20 cm, preferably 5 to 15 c.
m, and more preferably 5 to 10 cm. Since the elastic deformation becomes difficult when the vertical width is narrowed, the scraping plate 5 is a thin steel plate. On the contrary, if the vertical width is widened, the scraping plate 5 is made thick because it is easily deformed.

In the scraping plate 5 shown in FIG. 3, the scraping blade 3 is gently curved so as to be convex in the center. When the curved scraping blade 3 is pressed against the concrete formwork, the entire scraping blade 3 can be pressed against the concrete formwork surface with a more uniform pressing force to efficiently remove deposits. In FIG. 3, the scraping plate 5 uses a disposable saw. The disposable saw is suitable as the scraping plate 5 because the back edge is gently curved.

The scraping plate 5 is replaced with a new scraping blade 3 when the scraping blade 3 is worn out and the adhered substances cannot be removed efficiently. For this reason, the scraping blade 3 of the scraping plate 5 does not need to be re-polished unlike the conventional cleaning tool. Therefore, the scraping plate 5 is made of a very high steel plate that cannot be sanded with a file.

The detachable connecting member 7 is fixed to the handle 1 by sandwiching the upper edge of the scraping plate 5. The detachable connecting member 7 shown in FIG. 3 is composed of a T-shaped tool 7A fixed to the handle 1 and an I-shaped tool 7B not fixed to the handle 1. T-shaped tool 7A and I-shaped tool 7B
The scraping plate 5 is sandwiched between and fixed to the handle 1. In order to sandwich the scraping plate 5 between the T-shaped tool 7A and the I-shaped tool 7B, a screw hole is provided through them. Insert the screw 8 into the screw hole, screw the nut 9 into the screw 8
B is sandwiched between T-shaped tools 7A. The screw 8 is a T-shaped tool 7A
Alternatively, it can be fixed by welding to one of the I-shaped tools 7B. The T-shaped tool 7A or I-shaped tool 7B with the screw 8 fixed is
There is no need to provide a screw hole for inserting a screw. T-shaped tool 7A
Is inserted into the slit 10 provided at the tip of the handle 1,
And the T-shaped tool 7A are fixed by a set screw 11.

The cleaning tool shown in FIG. 3 uses a disposable saw for the scraping plate 5. Instead of a disposable saw,
As the scraping plate 5, as shown in FIG. 5, a hard steel plate cut into a rectangular shape can be used. In the scraping plate 5 shown in FIG. 5, the scraping blade 3 is curved similarly to the scraping plate 5 shown in FIG. Although not shown, a cleaning tool that uses a scraping plate instead of a disposable saw has a hole through which the screw 8 is inserted, which is inserted into the screw and fixed to a T-shaped tool with a nut. You can also The detachable connecting member having this structure can detachably attach the scraping plate to the handle without using an I-shaped tool.

When a disposable saw is used for the scraping plate 5, a used saw which is in trouble to be discarded can be effectively reused. Disposable saws are also preferably used in the field where concrete formwork is used. The saw used at this site has a short life because it cuts wood with concrete adhering, and a large number of saws become unusable due to worn blades. If this saw is used as the scraping plate 5, the scraping plate 5 can be made extremely inexpensive. Furthermore, since it is possible to replace the scraping plate 5 again, the scraping plate 5
The scraping blade 3 can very efficiently remove the deposits on the concrete formwork.

More preferably, when a disposable saw blade is clamped by the detachable connecting member 7, the sharpened blade 12 elastically connects the T-shaped tool 7A and the I-shaped tool 7B as shown in FIG. Press. The blade pressing the T-shaped tool 7A and the I-shaped tool 7B in this state acts as a spring washer. Therefore, there is also a feature that the scraping plate 5, which is the scraping plate 5, can be clamped to the detachable connecting member 7 so as not to loosen.

[0025]

The cleaning tool for concrete formwork of the present invention comprises:
You can easily and easily remove the deposits on the concrete formwork.
Moreover, it has the feature that it can be removed cleanly. This is because the cleaning tool of the present invention comprises a scraper composed of a detachable scraping plate and a detachable connecting member, and the scraping plate is made of an elastic steel plate that elastically deforms when pressed against a concrete form. is there. The scraping plate made of steel plate effectively scrapes off and removes the deposits attached to the concrete formwork by the scraping blade at the front edge. The scraping plate made of a thin steel plate that can be replaced with a new one when it is worn can efficiently remove deposits with a scraping blade. Since the scraping plate elastically deforms along the surface of the concrete form, a long scraping blade can be brought into close contact with the concrete form, and the tip edge of the scraping blade can be sharpened and cut well. Therefore, the cleaning tool of the present invention has a feature that the attached matter can be removed very efficiently by gripping the handle and pressing the front edge of the scraping plate against the surface of the concrete form.

Further, the cleaning tool of the present invention does not need to polish the scraping blade of the scraper as in the conventional case. When the scraping blade of the scraping plate becomes worn, the scraping plate is replaced with a new one. For this reason, after the use for a certain period of time, the scraping plate can be exchanged and the deposit can be scraped again efficiently.

Furthermore, the concrete form cleaning tool of the present invention, which uses a disposable saw for the scraping plate, is a concrete form that effectively reuses an uncut saw that is difficult to use and discard. It has a feature that can efficiently remove the deposits on the frame. Fortunately, the concrete formwork cleaner and the saw are used at the same site, and the saw used there has a short life. For this reason, there are many saws that cannot be cut. A cleaning tool that can effectively reuse this saw is extremely economical and can efficiently remove deposits. This is because the disposable saw is made of a very hard steel plate because it is not re-polished, and has elasticity that deforms along the concrete formwork when pressed. Further, when the blade of the saw is sandwiched between the detachable connecting member, the sharpened blade elastically presses the detachable connecting member to act as a spring washer. Therefore, the disposable saw has a feature that it can be sandwiched between the detachable connecting members without being loosened.

[Brief description of drawings]

FIG. 1 is a perspective view of a cleaning tool for a concrete formwork which is frequently used now.

FIG. 2 is a perspective view showing an example of a conventional cleaning tool for concrete formwork.

FIG. 3 is a perspective view showing an example of a cleaning tool according to an embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a rear edge of the scraping plate shown in FIG.

FIG. 5 is a perspective view showing a cleaning tool according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a state in which a scraping plate of a disposable saw is clamped by a detachable connecting member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Handle 2 ... Scraper 3 ... Scraping blade 4 ... Brush 5 ... Scraping plate 6 ... Corner angle 7 ... Removable connecting member 7A ... T-shaped tool 7B ...
I-shaped tool 8 ... screw 9 ... nut 10 ... slit 11 ... set screw 12 ... blade

Claims (2)

[Claims] 1. A cleaning tool for a concrete formwork, comprising: a handle (1); and a scraper (2) attached to the tip of the handle (1) for scraping off adhering substances adhering to the surface of the concrete formwork. The scraper (2) has elasticity that elastically deforms when the handle (1) is gripped by the hand and pressed against the concrete form, and the front edge is a scraper that scrapes off adhered substances along the surface of the concrete form. A steel plate scraping plate (5) having a cutting blade (3) and a detachable connecting member for detachably connecting the scraping plate (5) to the handle (1).
(7), and a concrete formwork characterized in that when the scraping blade (3) of the scraping plate (5) wears, it can be detached and replaced with a new scraping plate (5). Cleaning tool. 2. A concrete formwork cleaning tool according to claim 1, wherein the scraping plate (5) is a disposable saw.