JP2003293600A - Concrete ditch excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete ditch excavator which correctly excavates a ditch with a desired width in a concrete surface in a short time with good efficiency while minimizing an influence on the periphery of the ditch, in a manner easily collecting dust generated by the excavation. <P>SOLUTION: The concrete ditch excavator is characterized by having a rotary blade A having a width of 10 mm or more. The rotary blade A is mounted on a movable truck in a rotatable manner, and its cutting edge is pressed onto the concrete surface and moved along the same, to thereby cut the concrete surface. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete groove excavator for efficiently excavating a groove having a desired width on a concrete surface, and particularly to repairing an existing concrete structure.
The present invention relates to a concrete groove excavating device that is optimal when performing a ground treatment for excavating a groove having a predetermined width for embedding a reinforcing material when reinforcing.

[0002]

BACKGROUND OF THE INVENTION Existing concrete structures, for example,
When repairing and reinforcing reinforced concrete floors and beams,
The entire surface of the mortar is suspended, or a groove with a desired width is excavated on the concrete surface with a chipper, and a strip-shaped F is formed on the surface and in the groove.
A repair / reinforcement construction method is known in which an RP (fiber reinforced plastic) plate, an iron plate, a reinforcing bar, and other reinforcing materials are bonded or buried, and then mortar finishing or the like is performed if necessary.

As a conventional method, for example, when a groove extending linearly with a width of about 5 cm is formed on the surface of existing concrete or mortar, the mortar forming the surface layer and the concrete located below the mortar There are a method of previously making a notch at a predetermined interval and a depth with a cutter, and a method of picking up an inter-groove region with a chipper, and a method of repeatedly cutting a predetermined thickness using a concrete planer.

[0004]

However, when a concrete cutter and a chipper are used, there is a tendency to make a cut more than the depth required by the cutter, and there is a concern that the existing concrete part may be damaged. It Usually, two cuts are made with a width of about 5 to 6 cm, but in that case, a single-blade cutter is usually run twice, resulting in poor work efficiency and a large amount of dust. Further, when the chipper is used, the bottom surface of the groove that has been chipped off is highly uneven, and the mortar and concrete around the groove may be cracked, or the parts other than the predetermined part may be cut off or chipped off. Furthermore, when scraping off, concrete powder becomes dust, and if it is a closed space such as a building room, the working environment will deteriorate significantly, and dust will adhere to various parts of the room and things that are placed, and cleaning is required. Become. If it is a partial construction such as a part of the room, it may be cured by enclosing the work place with a sheet or the like, but extra equipment and work are required for that and new costs will be generated.

On the other hand, when a concrete planer is used, the surface is shaved little by little, and although adverse effects on the surroundings such as cracks and defects can be reduced, a large amount of fine dust is generated and the scraping is done in small amounts. Therefore, there is a problem that the workability is poor and the construction period is long.

Therefore, an object of the present invention is to pay attention to the problems in the conventional construction method as described above, and to form a groove having a desired width on a concrete surface efficiently with a precise dimension in a short time and in a groove peripheral portion. It is an object of the present invention to provide a concrete trench excavating device capable of excavating generated dust in a state in which dust can be easily collected while suppressing the influence on it.

[0007]

In order to solve the above problems, a concrete trench excavating device according to the present invention is rotatably provided on a moving carriage, and a cutting edge is pressed against a concrete surface to move along the concrete surface. It is characterized by having a rotary blade A having a width of 10 mm or more that cuts a concrete surface by being moved.

That is, since the width of a conventional concrete cutter for making a cut is 2-3 mm or less, and about 5 mm at the most, the rotary blade A having a width of 10 mm or more according to the present invention has such a conventional shape. It is clearly distinguished from concrete cutters. The width of the rotary blade A is 10 to 1 when excavating a groove for the purpose of repair and reinforcement.
It is preferably in the range of 50 mm, more preferably in the range of 30 to 100 mm. In the concrete groove excavating device of the present invention, by setting the width of such a rotary blade A to be substantially the same as the groove width to be excavated, it is possible to travel substantially once with the movement of the bogie. It is possible to excavate a groove having a predetermined width accurately and efficiently in a short time. Further, since the excavation is performed with the preset width of the rotary blade A, the risk of scraping off an extra portion is extremely small, and the influence on the peripheral portion is also minimized.

The concrete groove excavator according to the present invention may further be provided with a pair of rotary blades B having a width of 5 mm or less at positions corresponding to both sides of the rotary blade A in the width direction. Since the rotary blade B is intended to make cuts on both sides of the portion to be excavated by the rotary blade A, it may have a small width, for example, the same as a conventional concrete cutter. The pair of rotary blades B can be provided coaxially with the rotary blade A, and the rotary blade B can make a cut while the rotary blade A excavates a portion between the cuts. Alternatively, the rotary blade B is provided so as to be replaceable with the rotary blade A, the rotary blade B is first attached and a pair of cuts is made, then the rotary blade B is replaced with the rotary blade A, and the portion between the pair of cuts is the rotary blade. It is also possible to drill at A. Further, the rotary blade B is attached to a different rotary drive shaft together with the rotary blade A on the moving carriage, and the rotary blade B is provided at a position preceding the rotary blade A in the moving direction of the carriage. It is also possible to first make a pair of cuts and then to excavate the part between the cuts with the rotary blade A successively.

The shape of the cutting edge of the rotary blade A is not particularly limited,
For example, a large number of blade edges arranged in the circumferential direction of the rotary blade A may be configured to extend in the width direction of the rotary blade A, but in order to enable smoother excavation, the blade edges should be It is preferably in the form of a helical blade extending obliquely with respect to the width direction of A. The angle of inclination with respect to the width direction is preferably, for example, within the range of 10 to 20 degrees, and particularly preferably around 17 degrees. The cutting edge can usually be formed of diamond. For example, industrial diamond powder can be hardened with an adhesive to form a cutting edge of a predetermined shape.

Further, a structure in which a plurality of blade edge rows in which a plurality of blade edges extending obliquely with respect to the width direction of the rotary blade A are arranged in the circumferential direction of the rotary blade A are provided in the width direction of the rotary blade A is also preferable. . In particular, when the width of the rotary blade A is set to be large, by adopting such a divided structure of a plurality of stages, it becomes easier to form individual blade tips in processing. For example,
Blade edge, using industrial diamond powder as described above, when forming it by bonding it with an adhesive, it is difficult to form a long blade edge while maintaining the adhesive strength. A multi-stage division structure is effective. The number of steps of the plurality of steps may be set according to the width of the rotary blade A (that is, the width of the groove to be substantially excavated), but about 2 to 5 steps is often sufficient.

When forming a plurality of stages of blade edges extending obliquely with respect to the width direction of the rotary blade A as described above, the extending directions of the blade edges of the adjacent blade rows may be set to the same direction,
It may be set in different directions. In the case of setting in different directions, smoother excavation becomes possible, especially when the blade edges adjacent in the width direction of the rotary blade A form a mountain shape.

In the concrete trench excavating device according to the present invention, it is preferable that a cover for covering at least the rotary blade A is provided. When the rotary blades B are also attached at the same time, it is preferable that covers are provided for both, and in that case, a common cover or individual covers may be used. The cover is installed to prevent dust from scattering. In either case, since the cover only needs to be installed on the rotary blade, the installation is extremely easy and the prevention of dust scattering is easily achieved.

The structure of the cover is not particularly limited as long as it can prevent the scattering of dust. However, the cover structure has an opening on the concrete surface side and the opening edge is slidably contactable with the concrete surface. Then, depending on the weight of the cover, the rotary blade part naturally goes against the concrete surface,
That is, the dust generation portion can be effectively covered regardless of movement.

Further, it is preferable that dust collecting means is connected to the upper cover. The dust collecting means is not particularly limited, and for example, a commercially available suction type dust collecting means can be applied.
When the suction type dust collecting means is used, the suction hose may be connected to the cover and the dust generated in the cover may be collected by the suction type dust collecting means main body. The dust collecting means may be provided on the movable carriage or may be movable separately from the movable carriage.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show
Concrete trench excavation device 1 according to one embodiment of the present invention
Is shown. The concrete trench excavation device 1 has a moving carriage 3 provided with a handle 2 for hand pushing during movement, and the moving carriage 3 is rotatably attached to the moving carriage 3 and has a cutting edge of a concrete surface 4 A rotary blade A (5) having a width of 10 mm or more is provided that cuts the concrete surface 4 by being pressed against and moving the trolley 3 along the concrete surface 4. The rotary blade A (5) is rotationally driven by a motor 6 as a rotary drive means via a belt mechanism 7 and a drive shaft 8.

In this embodiment, the movable carriage 3 is moved by four wheels, that is, a pair of rotatable front wheels 9 and a pair of rear wheels 10.
The axle 11 of the front wheel 9 is attached to an arm 13 that can swing around the shaft 12, and the position of the front wheel 9 in the height direction of the moving carriage 3 can be adjusted by the swing. By adjusting the position of the front wheel 9 in the height direction, the position of the rotary blade A (5) in the height direction with respect to the concrete surface 4, that is, the groove depth to be excavated can be adjusted. There is. The pressing force of the rotary blade A (5) against the concrete surface 4 is obtained by the weight of the rotary blade A (5) and the front portion of the moving carriage 3 around the rotary blade A (5) and the components attached thereto. ing.

The swing of the front wheel 9 is transmitted to the link 14 connected to the shaft 12 and the lever 15 connected to the link 14,
By observing the protrusion margin L of the lever 15 from the moving carriage 3 under the handle 2, the swing amount of the front wheel 9
That is, the height direction position of the rotary blade A (5) can be recognized. The adjustment of the position of the rotary blade A (5) in the height direction can be performed by using the vertical operation lever 16 to move the front portion of the truck up and down so that the front wheel 9 naturally lands on the concrete surface 4 under its own weight. Good, up / down control lever 16
And the lever 15 are rotatably connected to each other, and the lever 15, the link 14, and the shaft 1
2. The adjustment may be performed by forcibly moving the front wheel 9 up and down via the arm 13.

The rotary blade A (5) is covered with a cover 17 so that a substantially sealed space is formed between the cover 17 and the concrete surface 4 during excavation.
In this embodiment, the cover 17 has a divided structure of an upper cover 17a and a lower cover 17b. Top cover 1
Although the relative positional relationship between 7a and the drive shaft 8 of the rotary blade A (5) is constant, the lower cover 17b is formed in a double-cylinder structure that is vertically movable relative to the upper cover 17a. Sliding contact with 17a allows the formation of a closed space by both covers even if the relative positional relationship between the lower cover 17b and the upper cover 17a changes. Further, the concrete surface 4 side of the lower cover 17b is opened, and its opening edge 17c can be slidably contacted with the concrete surface 4 by the weight of the lower cover 17b.

The suction hose 1 is attached to the fixed upper cover 17a.
8 is connected, and the suction hose 18 is connected to a suction type dust collector 19 as dust collecting means. In the present embodiment, the suction type dust collector 19 is composed of a movable dust collector provided separately from the movable carriage 3, but the dust collecting means may be mounted on the movable carriage 3. Further, as the dust collecting means, it is possible to use dust collecting means other than the suction type dust collecting means. The dust generated in the cover 17 is sucked by the suction hose 1.
The dust is sucked and collected by the suction type dust collector 19 via 8.

In this embodiment, the water tank 2 is attached to the moving carriage 3.
No. 0 is mounted, and the water stored in the water tank 20 can be sprayed on the concrete surface 4 after excavation or during excavation with an appropriate amount of spray through the spray adjusting means 21. ing.

In the above embodiment, only the rotary blade (A) is attached for excavation, but in the present invention, a width of 5 mm is further provided at positions corresponding to both sides of the rotary blade A in the width direction. The following pair of rotary blades B can be provided. The rotary blade B has notches on both sides of a portion to be excavated by the rotary blade A. The rotary blade B may have a small width like a conventional concrete cutter, and the blade edge may have a serrated shape. The pair of rotary blades B is, for example, the rotary blade A (5).
The rotary blade A can be provided coaxially with both sides of the rotary blade A (5), and the rotary blade B can make a cut while excavating the portion between the cuts.
And the rotary blade B is attached first to make a pair of cuts, then the rotary blade B is replaced with the rotary blade A (5), and the portion between the pair of cuts is excavated by the rotary blade A (5). You can also do it. Alternatively, for example, as shown in FIG. 3, a pair of rotary blades B (22) together with the rotary blade A (5) are attached to different rotary drive shafts on the moving carriage 3, and the moving direction of the carriage (direction of arrow 23). By arranging the rotary blade B (22) at a position preceding the rotary blade A (5), the rotary blade B (22) first makes a pair of cuts in the concrete surface 4, and subsequently the portion between the cuts is rotated. It is also possible to excavate with the blade A (5).

Regarding the shape of the rotary blade A (5), first,
For example, as shown in FIG. 3, a large number of cutting edges 24 arranged in the circumferential direction of the rotary blade A (5) are respectively provided in the rotary blade A (5).
It can be formed so as to extend over the entire width in the width direction of (5). In this case, each cutting edge 24
May extend parallel to the rotation axis of the rotary blade A (5) or may extend obliquely as shown in the drawing. If it extends diagonally, smoother excavation is possible.

Further, when the rotary blade A is produced, if the length of one blade edge in the width direction of the rotary blade A is too long, the machining may become difficult. In particular, when the cutting edge is formed by cementing industrial diamond powder with an adhesive, the length of the cutting edge becomes long, and it may be difficult to secure desired adhesive strength or keep the cutting edge surface flat. is there. In such a case, it is preferable that the rotary blade A is divided into a plurality of parts in the width direction and the divided bodies are integrally joined to form one rotary blade A.

In a preferred embodiment of the divided construction, for example, as shown in FIG. 4, a large number of blade edges 32 extending obliquely with respect to the width direction of the rotary blade A (31) are provided in the circumferential direction of the rotary blade A (31). In the structure in which the arrayed blade rows are provided in a plurality of stages in the width direction of the rotary blade A (31), the extending directions of the blade edges 32 of the adjacent blade rows are set to the same direction, and the adjacent blade rows are adjacent to each other. It is possible to adopt a configuration in which the position of the blade edge 32 is shifted by about half a pitch in the circumferential direction. Alternatively, for example, as shown in FIG. 5, a rotary blade A (34) may be used in which the extending directions of the blade edges 33a and 33b of the adjacent blade edge rows are set in different directions from each other. Thus, it is preferable that the adjacent cutting edges 33a and 33b form a chevron. In the case of a single blade edge as well as in the case of multiple blade edges, the total width W (shown in FIG. 3) of the rotary blade A is in the range of 10 to 150 mm,
More preferably, it is desirable to be in the range of 30 to 100 mm. When the blade tip is inclined, the inclination angle θ of the rotary blade A with respect to the width direction (rotational axis direction) is preferably an angle in the range of 10 to 20 degrees, particularly an angle near 17 degrees.

Regarding the detailed shape of the cutting edge portion, for example, as shown in FIG. 6 which is a partially enlarged view of the rotary blade A (31) shown in FIG.
Approximately 10 mm (appropriately around 5 mm), height H is, for example, approximately 3 to 10 mm (appropriately around 6 mm), and spacing P between the cutting edges 32 is, for example, approximately 5 to 20 mm (appropriately around 12 mm). Can be configured to. However,
The height H of the cutting edge 32 gradually decreases as the cutting edge 32 gradually wears during use. As long as the diamond powder is used throughout the portion forming the cutting edge 32, the grinding function of the cutting edge 32 will not be impaired even if wear progresses. However, it is possible to use the diamond powder from the initial outermost surface to a layer thickness of a certain depth, and to provide only that portion with a desired grinding function.

Further, as shown in FIG. 6, it is also preferable to form a bulge portion 35 on the side surface on the tip side of each cutting edge 32. If such a bulging portion 35 is provided,
The corner portion of the groove to be excavated can be cut off more smoothly, and the corner portion of the groove having a rectangular cross section can be formed more sharply.

Using the concrete groove excavator according to the present invention as described above, a groove is excavated in the following manner on the concrete surface. FIG. 7 shows a case where the mortar layer 42 is provided on the surface of the concrete layer 41, for example. A pair of incisions are made by the pair of rotary blades B, and the groove 43 is excavated by the rotary blade A substantially at the same time or after the incision. When the cuts are made, the mortar layer 42 between the cuts can be removed very easily.
The mortar layer 42 and the concrete layer 41 may be simultaneously excavated by the rotary blade A. Furthermore, it is possible to suddenly simultaneously excavate the mortar layer 42 and the concrete layer 41 with the rotary blade A without using the pair of rotary blades B. In any case, the groove 43 having a target width and depth can be excavated by running the rotary blade A once on the concrete surface. Groove 43
The depth of can be easily adjusted by the pressing force of the rotary blade A, the outer diameter of the rotary blade A, the height of the front wheel 9 described above, and the like.

In order to repair or reinforce this portion of the groove 43 formed in this way, a reinforcing plate (for example, FRP plate) as a reinforcing material or a reinforcing bar can be embedded,
Mortar, for example, can be embedded as a repair material. For example, as shown in FIG. 8, when embedding a reinforcing plate 51 that extends in a strip shape having a rectangular cross section, an adhesive 52 is applied to the back surface of the reinforcing plate 51, and the surface coated with the adhesive 52 is grooved. If it is pushed toward the bottom surface of 43, the adhesive 52 that has been applied in a large amount fills the groove 43 and also wraps around to the surface side of the reinforcing plate 51 as shown in FIG. The reinforcing form in which the reinforcing plate 51 is embedded is naturally completed. As shown in FIG. 9, the mortar layer 42
If there is any, then the entire groove 43 may be filled with mortar, or may be left as it is when mortar makeup is not required. If the adhesive 52 is applied in a larger amount, it is possible that the adhesive 52 wraps around to fill the entire groove 43, and in that case, mortar makeup is not necessary. Further, when the mortar layer is not originally provided, it is possible to complete the work only by excavating the groove on the concrete surface and pushing the adhesive application reinforcing plate 51 as described above.

In any of the construction methods, by using the concrete groove excavating device according to the present invention, it becomes possible to perform the groundwork treatment for excavating the groove 43 of a desired width all at once, and the work efficiency is greatly improved. It is possible to improve and shorten the time. Further, in particular, the bottom surface of the groove 43 can be formed into a flat and uniform surface,
The operation of burying the reinforcing material 51 is also greatly facilitated. further,
Only the groove 43 can be excavated with high accuracy without adversely affecting the surroundings. Therefore, even when excavating a plurality of grooves at a predetermined pitch, it is possible to form a desired plurality of grooves without affecting the portion between adjacent grooves, thereby providing a more effective and attractive repair. Reinforcement becomes possible.

Further, a cover 17 which is in sliding contact with the concrete surface 4 is provided, and dust generated in the cover 17 is collected by the dust collector 1.
Since the dust can be collected at 9, it is possible to efficiently prevent the dust from scattering to the surroundings due to the dust collection from the local area, and to greatly improve the working environment.

[0032]

As described above, according to the concrete trench excavating device of the present invention, a groove having a predetermined shape is formed on a concrete surface with an accurate dimension and in a short time, the influence on the groove peripheral portion. It is possible to excavate all at once, while suppressing the above, efficiently collecting the generated dust and ensuring a good working environment. Therefore, workability, work time, and work environment can be significantly improved when repairing a concrete surface or reinforcing a concrete structure, and a significant cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a side view of a concrete trench excavation device according to an embodiment of the present invention.

2 is a front view of the device of FIG. 1. FIG.

FIG. 3 is a schematic perspective view showing an example of a case where the rotary blade B precedes the rotary blade A in the present invention.

FIG. 4 is a rotary blade A showing an example in which there is a plurality of blade rows.
FIG.

FIG. 5 is a front view of a rotary blade A showing another example in which the blade row has a plurality of stages.

6 is an enlarged partial perspective view of the rotary blade A of FIG.

FIG. 7 is a vertical cross-sectional view showing an example of an excavated groove.

FIG. 8 is a partial perspective view showing an example of a reinforcing plate.

FIG. 9 is a vertical cross-sectional view showing an example of a reinforcing plate embedded state.

[Explanation of symbols]

1 Concrete trench excavator 2 handles 3 mobile carts 4 Concrete surface 5 rotary blade A 6 motor 7 Belt mechanism 8 drive shafts 9 front wheels 10 rear wheels 11 axles 12 axes 13 arms 14 links 15 lever 16 Vertical operation lever 17 cover 17a Top cover 17b lower cover 17c Opening edge 18 Suction hose 19 Suction type dust collector 20 water tank 21 Dispersion adjusting means 22 Rotary blade B 23 Movement direction of dolly 24 cutting edge 31, 34 Rotary blade A 32, 33a, 33b cutting edge 35 bulge 41 concrete layer 42 mortar layer 43 groove 51 Reinforcement plate 52 Adhesive

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinjiro Uni             Toray shares 1-6-20 Dojima, Kita-ku, Osaka-shi             Company Osaka head office (72) Inventor Akio Hattori             15-6 Nihonbashi Kabutocho, Chuo-ku, Tokyo Flour Milling Society             Tate Toray Construction Co., Ltd. (72) Inventor Masayuki Hirata             900 Kuzubukuro, Higashimatsuyama City, Saitama Prefecture Japan System             Within the corporation F-term (reference) 2D053 AA26 AB09 BA02 BA03 BA07                       BA09 DA03 DA05 DA11 DA13                 2E176 AA03 DD24                 3C069 AA07 BA00 BB01 BB02 BC02                       BC05 CA09 CA10 DA05 DA07                       EA01 EA02

Claims (12)

[Claims] 1. A concrete surface is cut by being rotatably provided on a movable carriage, and a cutting edge is pressed against the concrete surface and moved along the concrete surface.
A concrete trench excavator having a rotary blade A having a width of 10 mm or more. 2. A pair of rotary blades B having a width of 5 mm or less are provided coaxially with the rotary blade A or replaceable with the rotary blade A at positions corresponding to both sides of the rotary blade A in the width direction. The groove digging device for concrete according to claim 1, which is provided so as to precede the rotary blade A in the moving direction. 3. The concrete trench excavating device according to claim 1, wherein the width of the rotary blade A is in the range of 10 to 150 mm. 4. The concrete trench excavating device according to claim 1, wherein the blade edge of the rotary blade A extends obliquely with respect to the width direction of the rotary blade A. 5. A cutting edge row in which a large number of cutting edges extending obliquely with respect to the width direction of the rotary blade A are arranged in the circumferential direction of the rotary blade A,
The concrete trench excavation device according to claim 4, wherein a plurality of steps are provided in the width direction of the rotary blade A. 6. The concrete trench excavating device according to claim 5, wherein the extending directions of the blade edges of adjacent blade rows are set to be the same. 7. The trench digging device for concrete according to claim 5, wherein the extending directions of the cutting edges of the adjacent cutting edge rows are set to different directions. 8. The concrete trench excavating device according to claim 1, wherein the blade edge of the rotary blade A is made of diamond. 9. The concrete trench excavating device according to claim 1, further comprising a cover that covers at least the rotary blade A. 10. The concrete trench excavating device according to claim 9, wherein the concrete surface side of the cover is opened, and the opening edge is provided so as to be capable of sliding contact with the concrete surface. 11. The concrete trench excavation device according to claim 9, wherein a dust collecting means is connected to the cover. 12. The dust collecting means comprises a suction type dust collecting means,
The concrete trench excavation device according to claim 11.