JP2909320B2 - Form cleaning tool and concrete formwork keren device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning tool for a formwork, and to a concrete formwork cleaning device using the same.

[0002]

2. Description of the Related Art As shown in FIG. 9, in a conventional secondary lining operation of a tunnel, a concrete formwork 51 is provided at a predetermined interval on an inner peripheral surface of a tunnel hole 50 in which a primary lining is performed. Be placed. Concrete is poured into a small gap 52 formed between the two 50 and 51. Then, such a concrete formwork 51 is separated from the casting surface after curing for hardening the cast concrete, and is moved to the next position.

In this case, the hardened concrete partially adheres to the outer peripheral surface of the concrete formwork 51. Due to such circumstances, it is said that it is necessary to clean (clean) the outer wall surface of the concrete formwork 51 in order to improve the finish of the surface of the secondary peripheral wall.

[0004] Conventionally, a worker leans out from a plurality of inspection windows 53 provided on the outer peripheral surface of a concrete formwork 51 and rubs the outer peripheral surface with a scourer, cloth, or the like. Was. In recent years, as an alternative to such manual scraping work, a scraping apparatus for polishing and removing concrete by moving a mold cleaning tool by power has appeared in recent years.

[0005] As this type of keren device, for example, a device provided with a rope-type or brush-type mold cleaning tool is known. The rope type Keren device includes an endless sliding contact rope and a driving means for continuously rotating the sliding contact rope along the outer peripheral surface of the concrete formwork 51.

After the sliding rope is stretched on the outer peripheral surface of the mold 51, it moves in the longitudinal direction of the mold 51 while rotating around the outer peripheral surface of the mold 51. When this type of keren device is used, the concrete adhering to the outer peripheral surface of the mold 51 is polished by the sliding action of the sliding rope.

[0007] On the other hand, the brush-type Keren device has a cylindrical rotating brush, a mold 51 and a tunnel hole 5.
The main feature is that the entire Keren device disposed in the gap 52 between the mold frame 51 moves in the circumferential direction of the mold 51.

[0008]

However, these conventional Keren devices have the following problems, respectively.

For example, the sliding contact rope used in the rope-type Keren device has the disadvantage that it is relatively expensive and that it is easily damaged by sliding contact with the outer peripheral surface of the formwork 51. This has been one of the causes of a rise in running cost of the Keren device.

Further, if there is a portion where concrete is firmly attached to the outer peripheral surface of the formwork 51, the sliding contact rope rides on the portion, and as a result, the portion to be polished is sufficiently polished. There was an inconvenience that it would not be done. Further, with this type of keren device, it takes a lot of trouble and time to attach and detach the rope for sliding contact, which is not preferable in terms of work. In addition, there is a disadvantage that the structure of the Keren device itself tends to be complicated.

On the other hand, the brush-type Keren device has a problem that, due to its structure, an increase in the size of the entire device cannot be avoided. For this reason, it is extremely difficult to move the narrow gap 52 of about several tens of cm between the tunnel hole 50 and the mold 51, and there are not many situations where the apparatus can be used. In addition, the quality of Keren was not always satisfactory.

As described above, even if these devices were used, it was difficult to perform a complete keren work.
Eventually, it was necessary to perform auxiliary correction work manually. Therefore, the merit of using the mold cleaning tool and the Keren device is not substantially so large, and it cannot be said that the overall workability has been improved.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mold cleaning tool which can surely improve the cleaning quality of a mold and has excellent durability. It is in.

Another object of the present invention is to use such a mold cleaning tool to perform a complete scraping operation despite the fact that the structure of the apparatus is not complicated. Another object of the present invention is to provide a concrete formwork device that can surely be improved.

[0015]

In order to solve the above-mentioned problems, according to a first aspect of the present invention, there is provided a long material that can be wound around an outer peripheral surface of a mold, and a polishing device attached to the surface of the long material. In a mold cleaning tool made of a material, the long material is a belt.
With a plurality of abrasives fixed on one side of the belt
We propose a frame cleaning tool .

Further, in the second invention, a mold cleaning tool made of a long material that can be wound around the outer peripheral surface of the concrete mold, and a mold cleaning tool stretched on the outer peripheral surface of the mold are provided. Driving means for reciprocating along the circumferential direction of the formwork,
A concrete formwork keren device comprising moving means for moving the formwork cleaning tool in the longitudinal direction of the formwork ,
The long material is an endless belt, and a piece of the belt
A surface with a plurality of cleaning brushes fixed at predetermined intervals
We have proposed a Keren device for concrete formwork .

When manufacturing the above mold cleaning tool ,
Ken Migakuzai constituted by different at least two of the cleaning brush material having hardness, it is desirable to place the most the mold and sliding contact portion of those soft of the cleaning brush member.

[0018]

[0019]

With the construction of the mold cleaning device of the present invention in which an abrasive is adhered to the surface of a long material, compared to a conventional sliding rope or the like, the attached matter on the outer peripheral surface of the mold is polished and removed. The capacity is higher and the cleaning quality of the formwork is definitely improved.

The abrasive on the surface of the long material also functions as a protective layer for protecting the long material itself from sliding contact with the outer peripheral surface of the mold. For this reason, an unexpected situation in which the long material is damaged or cut is extremely unlikely to occur, and as a result, the durability of the mold cleaning tool is improved.

According to the concrete formwork cleaning device using the formwork cleaning tool having the above structure, the formwork cleaning tool comprises:
It moves in the longitudinal direction while reciprocating along the circumferential direction of the form by the driving means and the moving means. With the configuration in which the mold cleaning tool is reciprocated in this manner, a large driving force is not necessarily required, unlike the conventional method in which the mold cleaning tool is revolved.

It is preferable that the long material is a belt, and a plurality of abrasives are fixed to one surface of the belt. This is because the use of a belt-shaped long material is more convenient than the use of a rope-shaped long material in improving the strength of the long material. Further, if the belt-shaped long material is used, the abrasive can be securely fixed, and a large polished surface can be secured, which is preferable.

Further, in this configuration, since only the abrasive is in sliding contact with the outer peripheral surface of the mold, the belt itself does not directly contact the outer peripheral surface of the mold. Therefore, even if the abrasive is slightly worn by the polishing, the belt is not damaged or cut. Therefore, the durability is further improved.

It is preferable that the abrasive is composed of at least two types of cleaning brushes having different hardnesses, and that the softest one of the cleaning brushes is disposed at a portion in sliding contact with the mold.

The reason is that a soft cleaning brush material has a property of being easily deformed as compared with a hard cleaning brush material. Therefore, if such a cleaning brush material is arranged in a portion in sliding contact with the mold, the followability of the cleaning brush material is improved, and the cleaning quality is further improved. In addition,
The above is convenient when, for example, a small round form or a form having a projection or the like on its surface is smoothly and reliably quenched.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a concrete formwork keren device used in a secondary lining work of a tunnel will be described in detail with reference to the drawings.

FIG. 1 shows a state where a steel concrete formwork 6 is installed in the tunnel hole 1. Normal,
When this type of concrete formwork 6 is installed, the primary peripheral wall 2 of the concrete is already covered on the inner peripheral surface of the tunnel hole 1. On the bottom surface of the tunnel hole 1, a concrete roadbed 3 for laying a large and heavy concrete formwork 6 reliably is laid.

As shown in FIG. 1, a support frame 4 for supporting a concrete form 6 is provided at the center of the tunnel hole 1.
Are arranged to extend in the longitudinal direction. An extensible jack 5 and the like for moving the support frame 4 up and down are interposed between the leg 4c of the support frame 4 and the roadbed 3. The support frame 4 has columns 4a, beams 4b, and the like at its upper part, and the concrete form 6 is assembled and arranged on the support frame 4 via these members 4a, 4b.

FIG. 1 shows a state in which concrete is poured. At this time, the jack 5 is in an extended state. Further, a secondary peripheral wall 7 is formed by casting concrete in a gap portion formed by the formwork 6 and the primary peripheral wall 2.

The concrete formwork 6 has a structure in which an upper frame piece 6a, a middle frame piece 6b, and a lower frame piece 6c are each vertically stacked in three stages. And the formwork 6 is
The whole is assembled in an arch shape slightly smaller than the inner diameter of the tunnel hole 1. An inspection window 8 having a lid that can be opened and closed and a concrete casting window 9 are formed at a plurality of locations on the wall surface of the formwork 6. And the concrete at the time of forming the secondary peripheral wall 7 is supplied to the gap side via the respective concrete casting windows 9.

The lower frame piece 6 constituting the concrete formwork 6
c is supported on the lower side surface of the support frame 4 via a telescopic overhanging rod jack (not shown). FIG. 2 shows a state where the casting of the concrete is completed and the secondary peripheral wall 7 and the formwork 6 are separated from each other.
c rotates slightly inward of the formwork 6. And, the kernel work of the mold 6 using the kernel device 10 of the present invention is usually performed in such a state.

Next, the configuration of the Keren device 10 of the present invention and its installation method will be described in detail. As shown in FIG. 3, the Keren device 10 includes a mold cleaning tool 11 stretched on the outer peripheral surface of the mold 6, and a driving unit and a moving unit for moving the mold cleaning tool 11. I have.

FIGS. 3, 6 (a) and 6 (b) show a mold cleaning tool 11 according to this embodiment. Here, a non-annular flat belt 14 is used as a long material that can be wound around the outer peripheral surface of the formwork 6. A plurality of cleaning brushes 15 as abrasives are adhered to one surface of the flat belt 14 with an adhesive or the like. These cleaning brush members 15 are substantially equal in width to the flat belt 14, and have a rectangular parallelepiped shape as a whole. The thickness of the flat belt 14 plus the cleaning brush material 15 is slightly smaller than the gap C formed by the mold 6 and the secondary peripheral wall 7.

As shown in FIGS. 6A and 6B,
These cleaning brush materials 15 are provided at the central portion 1 of the flat belt 14.
4a, they are arranged at substantially constant intervals. In this embodiment, the interval between the cleaning brush members 15 is slightly smaller than the vertical length of the cleaning brush members 15. On the other hand, the cleaning brush material 15 is closely arranged without any gap in the portion where the flat belt 14 and the lower frame piece 6c are in contact with each other because large tension is likely to be applied to the portion (see FIG. 3). ). As shown in FIG. 3, areas where the cleaning brush 15 is not fixed at all are secured at both end portions 14 b of the flat belt 14.

Next, a description will be given of a pair of left and right driving means disposed below the mold 6 in order to reciprocate the mold cleaning tool 11 along the outer peripheral surface of the mold 6. The driving means mainly includes a hydraulic cylinder 16 and a hydraulic unit 17 for driving the hydraulic cylinder 16. As shown in FIGS. 3 and 4, the hydraulic unit 17 is mounted on a traveling carriage 26 having a frame shape. A connecting arm 18, which extends vertically and substantially horizontally with respect to the longitudinal direction of the formwork 6, is rotatably supported by a pin 43 on the arm bracket 42 below the traveling carriage 26. The base end of the connecting arm 18 and the arm bracket 44 above the traveling carriage 26 are connected via a telescopic arm fixing bar jack 19.

As shown in FIG. 3 and FIG.
8 is made of two parallel steel materials, and a slit 18a is formed between the two steel materials. A hydraulic cylinder 16 is accommodated in a substantially central portion of the slit 18a along a longitudinal direction thereof. The hydraulic cylinder 16
Is fixed to the base end side of the slit 18a.

As shown in FIGS. 3 and 5, three fixed guide rollers 20 and 2 for guiding the flat belt 14 in a bent state are provided at the distal end of the connecting arm 18.
1, 22 are rotatably supported. Further, one movable guide roller 23 is accommodated in the slit 18a. A fixed frame 16b is attached to the tip of the rod 16a of the hydraulic cylinder 16, and the fixed frame 16b
A movable guide roller 23 is rotatably supported by b. Note that the movable guide roller 23 is a rod 1
It is possible to slide in the slit 18a with the expansion and contraction of 6a.

Further, as shown in FIG.
A guide member 39 protrudes obliquely upward at the top of the front end. A guide roller 40 is rotatably fixed to the upper end of the guide member 39. The guide roller 40 comes into contact with the outer side surface of the lower frame piece 6c, thereby guiding the entire helical device 10 when it moves in the longitudinal direction of the mold 6. Further, the coil spring 41 mounted on the guide member 39 absorbs an impact caused by the reciprocating motion of the mold cleaning tool 11 and the like.
To equalize the tension applied to

As shown in FIG. 3, both ends 14b of the flat belt 14 to which the cleaning brush 15 is not fixed are guided by bending the inside of the slit 18a by the guide rollers 20 to 23. Further, the most distal end portion of the flat belt 14 is fixed to the lower surface fixing portion 18 b of the connecting arm 18.

According to the construction of the driving means, when the rod 16a of the hydraulic cylinder 16 contracts, the movable guide roller 23 slides in the direction of the base end of the connecting arm 18, and as a result, the flat belt 14 moves downward. Towed by At this time,
The mold cleaning tool 11 moves in the direction indicated by the arrow A1 in FIG. 3, and at the same time, a predetermined tension is applied to the mold cleaning tool 11.

Conversely, when the rod 16a extends, the movable guide roller 23 slides toward the distal end of the connecting arm 18, and as a result, the flat belt 14 returns to its original state. Therefore, the mold cleaning tool 11 moves in the direction opposite to the arrow A1.

Next, moving means for moving the mold cleaning tool 11 along the longitudinal direction of the mold 6 will be described.
This moving means is also provided in a pair on the left and right at the lower part of the formwork 6 similarly to the driving means.

As shown in FIGS. 1 to 4, the middle frame 6
A plurality of traveling rail fixing arms 24 are respectively protruded substantially horizontally from the inner surface of b. A traveling rail 25 having a length substantially equal to the entire length of the formwork 6 is fixed to the lower surface of the distal end of each traveling rail fixing arm 24. The running rail 25 has a substantially E-shaped cross section, and the running rail 25 has a hollow portion 25a therein.

As shown in FIG. 4, a traveling roller 27, a floating roller 28, and side rollers (not shown) are rotatably provided above the traveling vehicle 26. The traveling carriage 26 is connected to the traveling rail 25 via each traveling roller 27.
Are suspended in the groove portions 25b on both side surfaces. Also, each floating roller 28 is in contact with the lower surface of the traveling rail 25,
Each side roller is in contact with the lower part of both sides of the running rail 25. The floating rollers 28 and the side rollers serve to prevent the traveling carriage 26 from swinging when the traveling carriage 26 moves along the traveling rail 25.

At the front end of the running rail 25, a motor 31 with a variable speed reducer constituting a capstan winch device 29 and a guide roller 30 for bending and guiding a wire rope 38 are provided. I have. The rotation of the motor 31 is transmitted via a gear 32 connected to a rotation shaft of the motor 31, a power transmission chain 33, and a gear 34 provided coaxially with the guide roller 30. Also, a guide roller 35 for bending and guiding the wire rope 38 is provided at the rear end of the running rail 25.

As shown in FIG. 4, the wire rope 38 is stretched between the guide rollers 30 and 35. Both ends of the wire rope 38 are connected to the front side surface and the rear side surface of the traveling vehicle 26, respectively. A part of the wire rope 38 is housed in the hollow portion 25a of the traveling rail 25. According to the above-described configuration, the traveling vehicle 26 can move from the front end to the rear end of the mold 6 along the longitudinal direction of the mold 6 by the rotation of the motor 31. .

Hereinafter, a description will be given of a method of operating the cleaning device 10 when cleaning the outer peripheral surface of the mold 6 with the mold cleaning tool 11. The normal cleaning operation is performed by simultaneously operating the driving unit and the moving unit, and causing the mold cleaning tool 11 to perform zigzag traveling on the outer peripheral surface of the mold 6 as shown in FIG.

More specifically, the reciprocation in the circumferential direction is effected by extending the pair of hydraulic cylinders 16 alternately left and right, and the movement of the form 6 from the front to the rear is performed by the capstan winch device 29. Is brought about by the turning force. Then, the mold cleaning tool 11 having reached the rear part of the mold 6 by traveling as shown in FIG. 7A then zigzag travels forward of the mold 6 by reverse rotation of the capstan winch device 29. It returns to its original position (see FIG. 7 (b)). It should be noted that the above-mentioned cleaning operation can be performed in a state where the controller is intensively controlled by a controller (not shown).

Now, the operation and effects of the mold cleaning tool 11 of the present invention and the Keren device 10 using the same will be described. As described in detail above, with the configuration of the mold cleaning tool 11 in which the cleaning brush material 15 is adhered to the surface of the flat belt 14, the concrete adhered to the outer peripheral surface of the mold 6 is polished and removed. Your ability to do so will increase. Therefore, the cleaning quality of the mold 6 is reliably improved as compared with the conventional sliding rope system and the like.

Further, according to this configuration, the cleaning brush material 1
Since only 5 is in sliding contact with the outer peripheral surface of the mold 6, there is an advantage that the flat belt 14 itself does not directly contact the outer peripheral surface of the mold 6. For this reason, even if the abrasive is slightly worn by polishing, the flat belt 14 is not damaged or cut, and the durability is further improved. Moreover,
Since the flat belt 14 is used as the long material, the durability is several steps higher than that of the conventional mold cleaning material using a sliding rope.

Furthermore, according to the mold cleaning tool 11, the cleaning brush material 15 can be securely fixed to the surface of the flat belt 14, and the substantial polishing area of the mold cleaning tool 11 is increased. It is advantageous that it can be secured. In addition, since the mold cleaning tool 11 is non-annular, there is an advantage that it is not difficult to wind the mold cleaning tool 11 around the mold 6 as in the related art.

According to the structure of the Keren device 10 of the concrete form 6 using the form cleaning tool 11, the following advantages are obtained. That is, since the mold cleaning tool 11 is reciprocated in the Keren device 10, a large driving force is not necessarily required for the driving means, unlike the conventional rope method in which the mold cleaning device 11 performs a revolving motion.

Therefore, in the Keren device 10, the hydraulic cylinder 16 having a relatively simple mechanism can be used as the driving means. In addition, according to the cleaning device 10, the amount of movement during reciprocation can be extremely small, so that the cleaning operation can be sufficiently performed using the small-sized hydraulic cylinder 16.

Further, according to the Keren device 10, the thickness of the portion arranged on the outer peripheral surface side of the mold 6, that is, the thickness of the mold cleaning tool 11 can be reduced. For this reason, even if the width of the gap C between the tunnel hole 1 and the formwork 6 is small,
It is possible to satisfactorily perform the swelling by the swelling device 10.

With the configuration of the mold cleaning tool 11 having the above-described configuration, concrete can be reliably polished and removed by the sliding contact of the cleaning brush material 15, so that conventional manual correction work and the like can be performed. No longer needed. From the above, the workability of the Keren work is significantly improved as compared with the related art.

Further, the following effects can be obtained by arranging the cleaning brush members 15 at predetermined intervals in the central portion 14a of the flat belt 14. That is, even when one cleaning brush material 15 rides on the hardened concrete, the cleaning brush material 15 adjacent thereto does not separate from the outer peripheral surface of the formwork 6. Therefore, the followability of the cleaning brush material 15 to the mold 6 is improved as a whole, and the cleaning quality is improved.

The present invention is not limited to the above-described embodiment, but may be modified in the following manner without departing from the spirit of the invention. For example, (a) a plurality of cleaning brush members 37 composed of a hard portion 37a and a soft portion 37b may be adhered to one surface of the flat belt 14, as in another example of the form cleaning material 36 shown in FIG. Formwork 6
The mold cleaning material 36 in which the soft portion 37b is disposed at the portion in sliding contact with the mold 6 has good followability of the cleaning brush material 37 to the mold 6 and extremely good cleaning quality. Of course, the cleaning brush material can be made of three or more types of hardness.

(B) It is also preferable that the cleaning brush members 15 and 37 are detachably fixed to the flat belt 14 by means such as bolts. The reason is that it is convenient when the cleaning brush members 15 and 37 having appropriate hardness are selected according to the type of the concrete form 6 and the like.

(C) Instead of using the flat belt 14 as a long material in the above-described embodiment, a rope having an abrasive uniformly adhered to the entire surface can be used as the long material. Alternatively, the enlarged portion may be formed by partially attaching an abrasive to the outer peripheral surface of the rope, and the enlarged portion may function as a substantial sliding contact portion with the formwork 6. It is also possible to use a rope having a ladder shape and an abrasive attached to the outer surface of the rope.

(D) The means for driving the mold cleaning tool 11 is not limited to the use of the pair of hydraulic cylinders 16 as in the above-described embodiment. For example, an electromagnetic cylinder or a motor may be used. Of course it is good. The driving means such as the hydraulic cylinder 16 does not necessarily have to be a pair. For example, one of the driving means may be replaced with the hydraulic cylinder 16 and the other may be replaced with a biasing means such as a spring.

Further, when the gap C has some allowance, for example, one end of the mold cleaning tool 11 may be connected to the driving means, and the other end may be held by a person to perform the creping operation. . Of course, by holding both ends of the mold cleaning tool 11 to a human,
By making the mold cleaning tool 11 run in a zigzag manner, it is also possible to perform a keren work without any power.

(E) Instead of the above-described embodiment in which the keren device 10 is moved in the longitudinal direction of the tunnel hole 1, the mold 6 may be moved while the keren device 10 is fixed. In addition, both 6 and 10 may be moved in opposite directions.

(F) When the cleaning device 11 is not used, the mold cleaning tool 11 can be hung.
It is preferable to provide some hooks at any one end opening of the concrete formwork 6. In this case, it is preferable that the hook is installed at a position such that the hooked mold cleaning tool 11 does not interfere with concrete casting. If such a configuration is adopted, the mold cleaning tool 11
The attachment / detachment is much easier than before, and the workability is significantly improved.

(G) Instead of the method of the above-described embodiment in which the cleaning operation is performed by one cleaning device 10, two cleaning devices 1 are used.
It is also preferable to carry out the keren work using 0 simultaneously.
In this case, for example, it is only necessary to dispose each keren device 10 on the front end side and the rear end side of the concrete form 6 and to move the form cleaning tool 11 in zigzag directions in opposite directions.
The advantage of this method is that it requires approximately half the time of a single work.

Even in this case, if the hooks as shown in (f) above are provided at the front and rear ends of the mold 6, the storage of the both helical devices 10 is possible when the both helical devices 10 are not used. There is no need to worry about the location. (H) Formwork cleaning tool 1 composed of long material 14 and abrasive material 15
In place of the Keren device 10 of the embodiment using
Even if a mold cleaning tool consisting of only the length member 14 is used,
Of course it is good. (I) The arrangement position of the hydraulic cylinder 16 is as in the embodiment.
It is not limited only to the position below the lower frame piece 6c,
Move it to another position within the range that does not interfere with the Keren work (for example,
If it is, it can be changed to a position near the traveling cart 26)
You. In this case, the direction of disposing the cylinder 16 is not appropriate.
It can be changed as needed.

[0066]

As described above in detail, according to the construction of the mold cleaning tool of the present invention, since the abrasive is fixed to one surface of the long material , the cleaning quality of the mold is reliably improved. And an excellent effect that the durability thereof can be improved.

Further, according to the concrete formwork cleaning device of the present invention, since the above-mentioned excellent cleaning tool is used, a complete cleaning operation is performed even though the structure of the device is not complicated. And the workability at that time can be reliably improved . Also, place the cleaning brush material at predetermined intervals.
Because the cleaning brush material is arranged,
Even if you get on the booth, clean adjacent to it
The brush material is not likely to separate from the mold, and the cleaning quality is
It has an excellent effect of improving .

[Brief description of the drawings]

FIG. 1 is a front view showing a state where a concrete formwork is installed in a tunnel hole.

FIG. 2 is a front view showing a state where the concrete formwork is separated from the secondary peripheral wall after the secondary peripheral surface is hardened.

FIG. 3 is a partially broken enlarged front view showing a state in which the Keren device of the present invention is mounted on a concrete formwork.

FIG. 4 is a partially broken enlarged side view showing a traveling rail, a capstan winch device, a hydraulic unit, and the like that constitute the Keren device.

FIG. 5 is a partially enlarged plan view showing a connecting arm constituting the Keren device.

6A is a partially enlarged plan view showing a mold cleaning tool, and FIG. 6B is a partially enlarged side view showing a mold cleaning tool.

FIGS. 7 (a) and 7 (b) are schematic perspective views for explaining how to move a mold cleaning tool when performing a scraping operation on a concrete mold using the scraping device of the present invention.

FIG. 8 is a partially enlarged side view showing another form cleaning tool.

FIG. 9 is a schematic perspective view showing an arrangement state of a concrete formwork at a tunnel lining site.

[Explanation of symbols]

6 (Concrete) formwork, 14 Flat belt as long material, 15 Cleaning brush material as abrasive, 11, 36
Formwork cleaner, 10 Keren device (for concrete formwork).

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Naomi Sumi 144, 14-14, Masama-cho, Motosu-gun, Gifu Gifu Industry Co., Ltd. (58) Investigated field (Int.Cl. ⁶ , DB name) E21D 11 / Ten

Claims (3)

(57) [Claims] 1. A mold cleaning tool comprising a long material that can be wound around an outer peripheral surface of a mold, and an abrasive attached to the surface of the long material , wherein the long material is a belt, and Multiple on one side of the belt
A mold cleaning tool, characterized in that the abrasive is fixed. 2. The cleaning material according to claim 1, wherein the abrasive is made of at least two kinds of cleaning brushes having different hardnesses, and a softest one of the cleaning brushes is arranged at a portion which comes into sliding contact with the mold. Item 2. A mold cleaning tool according to Item 1 . 3. A mold cleaning tool made of a long material that can be wound around an outer peripheral surface of a concrete mold, and a mold cleaning tool stretched on the outer peripheral surface of the mold in a circumferential direction of the mold. moving means Toka Ranaru a Keren apparatus concrete form, the long material an endless belt for moving the drive means, the mold cleaning tool in the longitudinal direction of the mold to reciprocate along And a piece of the belt
Make sure that a number of cleaning brushes are
And a concrete formwork keren device.