JP2000240400A - Method and device for removing concrete sticking to form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable exact removal of concrete sticking to the peripheral surface of a form and to enhance the durability and replaceability of a surface preparation member. SOLUTION: In this method for removing concrete sticking to a form, a rotary brush 12' having a structure obtaining a pressing force depending on the force of a spring is displaced relatively on the peripheral surface of the form 3 and the brush 12' is moved in the direction of the length of the form 3, while it is displaced on the outer peripheral surface of the form 3. Besides, the function of each member is obtained so as to give it a force for rubbing an abrasive member exactly against the curved surface of the form 3 in the direction of the length thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing concrete adhering to a formwork and an apparatus for removing formwork concrete.

2. Description of the Related Art In tunnel lining work, for example, a cylindrical form is fixed in a tunnel and concrete is poured into an annular space between an outer peripheral surface of the form and an inner surface of the tunnel. . When the tunnel lining work in that section is completed, the formwork is reduced in diameter and the process proceeds to the next adjacent section, and the formwork is expanded again to perform the same operation as described above. At that time, it is necessary to remove the concrete adhering to the formwork surface. The concrete removal operation (keren operation) is performed using a concrete removal device (keren device) attached to the surface while the formwork is reduced in diameter. As a method of removing concrete adhering to the formwork, generally, a rope or the like is provided as a keren member in a circumferential direction endlessly in the circumferential direction of the formwork, and the rope is slid in the circumferential direction of the formwork. Then, the concrete adhering to the outer peripheral surface of the mold was scraped off, and when the work was completed, the rope was repeatedly slid along the circumferential surface again while being shifted in the longitudinal direction of the mold.

[Problems to be Solved by the Invention] In the above method of removing concrete adhering to a formwork, the rope itself is scraped off the concrete on the form outer peripheral surface, so that it is not only accurate but also scratched on the form outer peripheral surface. May be added. Furthermore, there is a method of providing a spiral brush or the like on the rope surface and shifting the spiral brush in the length direction of the mold while rotating, but depending on the case, when it is necessary to reverse the spiral, the spiral direction of the spiral is changed. Because it is the opposite, it comes back separately.

The present invention has been made in view of the above circumstances. A first object of the present invention is to provide a method for removing concrete adhering to a form in which concrete on the outer peripheral surface of the form can be accurately removed, and the keren member is not easily damaged. A second object of the present invention is to provide an apparatus for removing form-adhered concrete used for carrying out the above-described method for removing form-adhered concrete.

[Means for Solving the Problems] In order to achieve the first object, according to the first aspect of the present invention, a rotary brush having a pressing force based on the force of a spring is provided on an outer peripheral surface of the mold. And moving the rotary grinding brush in the longitudinal direction of the mold while displacing the rotary grinding brush in the outer circumferential direction of the mold. Further, in the invention of claim 2, the outer peripheral surface of the mold is moved in the longitudinal direction of the mold while applying vibration to the polishing member.

In order to achieve the first and second objects, according to the third aspect of the present invention, a plurality of rotary grinding brushes mounted on the outer peripheral surface of a mold form slide the inner surfaces of a pair of openable rails with wheels. A means for applying a driving force to move, and a means for applying a driving force for moving the openable rail in the longitudinal direction of the formwork. is there.

According to a third aspect of the present invention, the driving force applying means for moving the pair of open / close rails in the longitudinal direction is provided by a straight traveling mechanism provided at a terminal fitting portion of the open / close mold as shown in FIG. It is a configuration of a removal device for concrete adhering to a formwork, characterized by including an application means.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below. Before explaining a method of removing concrete adhering to a form according to the embodiment, the form adhering to the form used in the method will be described. The concrete removing device and the moulding member for removing the concrete adhering to the formwork will be described.

In FIG. 1, reference numeral 3 denotes a concrete casting form (centre) which is supported in the pile opening 1 by the form carrying apparatus (a) in FIG. 2
, Or a horseshoe shape or a circular shape like the mold 3 shown in FIG. 8, and extends in one direction. When the tunnel lining work is completed in a certain section, the form 3 is
And then proceed to the next adjacent section.

[0010] After the tunnel lining work in one section has been completed, the concrete on the outer peripheral surface of the form 3 is removed on the outer peripheral surface of the form 3 when the operation is shifted to the next adjacent section. For this purpose, as shown in FIGS. 1 and 2, a formwork-adhered concrete removing device (keren device) a is provided. The concrete removing device a for the formwork includes an opening / closing rail 5 serving as a Keren member holding member, a Keren member (a member for removing the attached thing) 12 ′, 9 in FIG. 2, 32 in FIG. 3, a moving motor 15 for moving in the length direction,
A moving motor 34 for moving the mold 3 in the longitudinal direction of FIG. 8 is provided, and each of the elements 5, 12 ', 15,
34 can effectively exhibit the function (keren function).

A pair of openable / closable rails 5 serving as the kelen member holder are carried into the outer periphery of one end of the form 3 from the outside of one end thereof, and the length of the form 3 is set on the outer peripheral surface of the form 3. As shown in FIGS. 2, 4, and 5, a connecting member 5 'for connecting a pair of openable and closable rails 5 and a plurality of wheels 6 are provided so as to be movable in the vertical direction. The pair of openable / closable rails 5 are fixed with a connecting member 5 ′ at a constant interval in the circumferential direction of the mold 3, and the openable / closeable rail 5 has wheels 6 corresponding to the mold 3. It is configured to extend along the circumferential direction of the formwork 3 while being separated by a certain distance. When the form 3 is a horseshoe,
When the diameter is reduced (FIGS. 2 and 8), the pair of openable and closable rails 5 can cope with the degree of the diameter reduction. As shown in FIG. 5, the wheel 6 is connected to the wheel 6 from an output wheel of a moving motor 15 provided at one end of the openable / closable rail 5 through a shaft 14 and a bearing 13 via a universal joint 14 'for transmission. A plurality of idle play wheels 6 are also provided on the opposite side, and the rolling direction of the wheels is fixed to the longitudinal direction of the formwork 3, so that the openable / closable rail is
It does not move along the curved surface of the formwork 3.

Although the above apparatus has been described for a horseshoe-shaped mold, the mold 3 may be circular as shown in FIGS.
According to claim 4, a concrete adhering device for formwork a
In order to move (FIG. 1) on the circumference of the mold 3 in the length direction, a series of devices are moved in the length direction of the mold 3 by the movement motor 15. As shown in FIG. 9, a fixing chain 30 is attached to one end of the lower surface of a pair of long rails integrated with the fixing bracket 27 and the bracket 28 provided at the terminal joint on the bottom surface of the formwork 3 and fixed to the bracket 28. A moving motor 34 is provided at one end of the lower surface of the bracket 28, and a chain gear 31 is provided at an output shaft thereof, and meshes with the fixed chain 30. Further, at one end of the bracket 28, a keel member (a member for removing adhering concrete) 32 is attached to the inner surface of a curved plate 33 that matches the curved surface of the formwork 3. Also, these devices are formed by an electromagnet 26 attached to a long fixture 27 so that the form 3
In addition to the interlocking with the pair of openable and closable rails 5 shown in FIG.

The common concrete removing apparatus (kernel apparatus) a shown in FIGS. 2 to 9 is configured such that a wheel 6 is formed by a shaft 7 in FIG. As shown in FIGS. 3, 4 and 5, a moving motor 15 is provided on one of the opposing openable rails 5 as shown in FIGS.
It is connected to the wheel 6 via a shaft 14, an electric universal joint 14 ', and a bearing 13, and has a structure capable of moving in the longitudinal direction of the formwork 3. Concrete removal equipment a. B in FIGS. 8 and 9. Goes to the end face of formwork 3,
The moving motor 15 is automatically turned on in FIG. 8 and FIG.
4 stops and starts reversing. When the concrete removing device a and the above-mentioned b have reached the end face of the formwork 3 at this place, the openable rail 5 is opened and removed from the formwork 3 to remove the concrete 2. The formwork 3 is further advanced into the pile for driving.

In the implementation of the item [0013], each keren member and a concrete removing method will be described. As shown in FIGS. 2 to 7, a sliding motor 11 is provided at one end of the pair of openable / closable rails 5, which are holding members, and a drive chain gear 23 is provided at an output shaft thereof.
The sliding wheel 1 is mounted on the inner surface of the
6 and a plurality of connecting rods 19, and a holding bracket 19 ′ (FIG. 3) for maintaining the interval between the connecting rods 19, are coaxial with the link rotating shaft 18 (in FIG. 5) of the openable / closable rail 5. The power of the sliding motor 11 can be transmitted through the drive chain gear 23 and the driven chain gear 24 (FIG. 6) and one end of the connecting rod 19 via the chain 25. I have. The connecting rods 19 are attached at arbitrary intervals around the sliding motor 11, and are connected by an attached concrete grinding motor support link 21 therebetween. Motor fixed spring plate 22
Are connected by (FIGS. 5 and 6), a rotary brush 1 for grinding linked to an attached concrete grinding motor 12.
2 'always keeps the pressing force due to the repulsion of the motor fixing spring plate 22. Further, according to FIG. 6, the contact removal operation (slit operation) can be performed by the forward / reverse rotation of the sliding motor 11 in the same manner as in the operation of [0013].

[0014] Regarding the item [0014], the opening (bottom) of the mold 3 according to FIG. Therefore, FIG.
As seen from the arrow -F, a concrete bottom surface-part-adhered concrete removing mechanism 8 provided with the polishing member 9 shown in FIG. 7 can be additionally provided. The mechanism 8 is provided with a vibrator 10 and a polishing member 9.
The polishing operation can be performed by the mechanism according to the item [0013] while vibrating on the curved surface of the mold 3.

In the concrete removing apparatus b shown in FIG. 8, as shown in FIG. 9, each keren member (mechanism) is attached to a fixing member 27 provided by an electromagnet 26 by a series of operations according to [0012]. However, it is possible to polish the concrete adhering to the opening at the bottom surface of the mold 3. What [0
[011], it can be used in combination with the lengthwise feeding mechanism of the mold 3 (FIG. 5).

Although the embodiments have been described above, in the present invention, the rotating brush 12 'for grinding the concrete attached to the formwork and the polishing members 9 and 32 meet the purpose. If there is, it is not related to the material.

[Effects of the Invention] Accordingly, the degree of diameter reduction of the formwork, and even the formwork of the end of the formwork opening (which was not possible in the past) can remove concrete adhesion. Thus, the efficiency can be improved and labor can be saved.

[Brief description of the drawings]

FIG. 1 is a basic view in which an apparatus for removing concrete attached to a formwork according to an embodiment is mounted on a formwork, and shows a left half.

FIG. 2 is a front view as seen from the entrance in FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a partially broken view taken along the line DD in FIG. 2;

6 is an inverted view as viewed in the direction of arrows EE in FIG. 5; FIG.

FIG. 7 is a view taken along the line FF in FIG. 2;

FIG. 8 is a front view of a keel member feeding mechanism at the time of a circular formwork.

9 is a sectional view taken along the line GG in FIG.

[Explanation of symbols]

1 pile mouth.
Removal equipment 2 Cast concrete. 9
Polishing materials. 3 Formwork.
10 Vibrators. 3 'Enlarged formwork.
11 Sliding motor 4 Formwork opening / closing pin. 12 For grinding attached concrete 5 Openable rail. motor. 5 'connecting member. 12 '
Rotary brush for grinding. 6 wheels.
13 bearings. 7 axes.
14 Transmission shaft. 8 Concrete attached to bottom of formwork 14 'Universal joint for power transmission. 15 Moving motor. 16 sliding wheels. 1
7 Bearing plate. 18 rotation axes. 19 Consolidation
Rod. 19 'holding bracket. 20 Wheel bearing. 21 Adhesive concrete grinding motor support link. 22 Motor fixed spring plate. 23 Drive chain gear. 24 Driven chain gear. 25 chains. 26 magnetite. 27
securing bracket. 28 Bracket. 29 kolo. 30
Fixed chain. 31 Chain gear. 32 Polishing member.
33 Curved plate. 34 Moving motor. B. Formwork loading device. B Open / close jack. C Formwork top and bottom jacks.
a Formwork concrete removal device (keren device). b Formwork concrete removal device (keren device).

Claims (4)

[Claims] 1. A rotary grinding brush having a pressing force by a spring force is displaced relative to an outer peripheral surface of the mold, and the rotary grinding brush is displaced in an outer peripheral direction of the mold, and the length of the mold is reduced. A method for removing concrete adhering to a formwork, characterized in that the concrete can be moved in the vertical direction. 2. The method for removing concrete from a formwork according to claim 1, wherein the outer peripheral surface of the formwork can be moved in the longitudinal direction of the formwork while giving vibration to the polishing member. . 3. A means for applying a driving force to a plurality of rotary grinding brushes mounted on an outer peripheral surface of a mold to slide an inner surface of the openable rail by a wheel, and moving the openable rail in a longitudinal direction of the mold. A form-adhering concrete removing device, comprising: a driving force applying means for causing the formwork to adhere. 4. The device according to claim 3, wherein the means for applying the driving force for moving the openable rail in the longitudinal direction is provided by a straight traveling mechanism provided at a terminal fitting portion of the formwork as shown in FIG. An apparatus for removing concrete adhering to a formwork.