JPH062495A - Vibration giving device for placed concrete - Google Patents

Abstract

PURPOSE:To conduct vibration giving works for a placed concrete easily, safely, and sanitarily without resorting to human labor. CONSTITUTION:A vibration giving mechanism 15 is installed on the side face opposite the molding surface of a concrete form 6 in such a way as movable transversely along the form 6. This mechanism 15 is moved along the form 6 bit by bit till the specified position for vibration giving, and thereby a vibration is applied to the placed concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration imparting device for imparting vibration to concrete when placing it in a concrete form.

[0002]

2. Description of the Related Art Conventionally, for example, when performing a primary lining work or a secondary lining work of a tunnel, a concrete formwork is assembled and arranged with a predetermined gap on the inner peripheral surface of the tunnel. Then, from the concrete pouring opening provided in the concrete formwork, concrete was placed in the gap on the molding surface side of the concrete formwork.

Further, during the operation of pouring concrete, the flowability of the pouring concrete is poor and the pouring concrete is likely to deposit near the lower part of the concrete pouring port.
For this reason, conventionally, an operator inserts the vibrating part of the vibration imparting mechanism into the gap from the inspection window provided in the concrete formwork, and hangs the vibrating part into the pouring concrete. The vibration was applied to the poured concrete by the operation of, and the surface was averaged.

[0004]

However, in this conventional vibration imparting method, the vibrating portion of the vibration imparting mechanism is moved and operated while an operator leans into the gap through the inspection window of the concrete formwork. Or hold the vibrating part during vibration. For this reason, there is a problem that it is not only a heavy labor but also a danger, and moreover, the concrete is easily attached to the worker and it is unsanitary.

In order to solve such a problem, it is conceivable to use recently developed concrete having good fluidity, but this concrete is expensive and its durability is unknown and its reliability is high. There are many issues to introduce into tunnel construction, such as scarcity.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and the purpose thereof is to easily apply a vibration to a cast concrete without manpower. Another object of the present invention is to provide a vibration imparting device for pouring concrete that can be performed safely and hygienically.

[0007]

In order to achieve the above object, in the invention described in claim 1, vibration is applied to the concrete placed on the side opposite to the forming surface of the concrete form. The vibration imparting mechanism for doing so is arranged so as to be movable laterally along the concrete form.

According to the second aspect of the invention, the vibration imparting mechanism is provided with a vibrating portion that can be inserted into and removed from the molding surface side through a window provided in the concrete form.
Further, in the invention according to claim 3, the vibration applying mechanism is provided with a guide cylinder for guiding the moving operation of the vibrating portion.

Further, in the invention of claim 4, the vibration applying mechanism causes the guide cylinder to swivel between an inactive position extending along the moving direction of the vibration applying mechanism and an operating position extending toward the concrete formwork side. The turning means for this is provided.

[0010]

[Operation] In the vibration imparting device according to any one of claims 1 to 4 configured as described above, the vibration imparting mechanism is arranged along the concrete formwork in a state where the guide cylinder is disposed in the inoperative position, and the concrete It is moved to the position corresponding to the window near the placement position. After that, the guide tube is swung from the non-acting position to the working position. In this state, the vibrating section is inserted from the window of the concrete form along the guide tube to the molding surface side and hung down into the pouring concrete, and the operation of the vibrating section imparts vibration to the pouring concrete. Therefore, it is possible to easily, safely, and hygienically apply the vibration to the cast concrete without manpower.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. Now, this embodiment is embodied as a vibration imparting device for pouring concrete in the secondary lining work of a tunnel. As shown in FIGS. 1 and 2, a primary peripheral wall 2 of concrete is formed on the inner peripheral surface of the tunnel hole 1 by a primary lining, and a concrete roadbed 3 is formed on the bottom surface. Support frame 4 is tunnel hole 1
It is assembled and arranged on the roadbed 3 via the jacks 5 and the like so as to extend in the longitudinal direction at the center of.

The concrete formwork 6 is assembled and arranged on the support frame 4 through pillars 4a, beams 4b and a turnbuckle (not shown), and extends in parallel with a predetermined gap 7 inside the primary peripheral wall 2. . Further, as shown in FIG. 2, seven concrete formwork 6 are arranged in the longitudinal direction of the tunnel hole 1 and stacked in three stages in the up-and-down direction to be assembled into a substantially arch shape. Then, the work of assembling the set of concrete formwork 6, the placement of concrete in the gap 7, and the disassembly of the concrete formwork 6 are sequentially repeated in the longitudinal direction of the tunnel hole 1, whereby the tunnel hole 1 A secondary peripheral wall is formed on the inner surface of the primary peripheral wall 2.

The concrete pouring port 8 is the tunnel hole 1
Concrete formwork 6a arranged in the longitudinal direction of
It is formed on the second, fourth and sixth concrete formwork 6b, 6d, 6f out of 6g. Concrete is poured into the gap 7 through the concrete pouring port 8. The inspection window 9 is formed in each of the seven concrete molds 6a to 6g, and the vibrating portion 3 of the vibration applying mechanism 15 described later
8 is a concrete formwork 6a-6 through this inspection window 9.
It is put in and taken out from the molding surface side of g. The concrete pouring port 8 and the inspection window 9 are provided with lids.

The lower concrete detecting sensor 10 and the middle concrete detecting sensor 11 are exposed to the molding surface side in the lower and central portions of the second, fourth and sixth concrete formwork 6b, 6d, 6f. Are arranged.
Then, when the pouring concrete reaches a predetermined level, these sensors 10, 11 output sensing signals. The upper concrete detecting sensor 12 is disposed so as to be exposed on the molding surface side in the upper portion of each concrete form 6a to 6g, and when the pouring concrete reaches a predetermined upper limit level, the sensor 12 outputs a detection signal. Is output.

Three support arms 13 are provided on each side of the support frame 4 at a height corresponding to each inspection window 9 of the concrete formwork 6 stacked in three stages. The rails 14 are respectively laid on the support arms 13 and extend along the concrete formwork 6 in parallel with the longitudinal direction of the tunnel hole 1. The vibration applying mechanism 15 is for each rail 1
4 is movably supported on the concrete 4, and vibration is imparted to the poured concrete in the gap 7 through the inspection window 9 by the vibration imparting mechanism 15.

Therefore, the structure of the vibration imparting mechanism 15 will be described in detail. As shown in FIGS. 3 to 6, the base plate 16 is mounted on the rail 14 via a plurality of pairs of horizontal regulating rollers 17 and vertical regulating rollers 18. It is movably supported by. The moving motor 19 is mounted on the base plate 16, and a pinion 21 that meshes with the rack 20 on the rail 14 is fixed to the motor shaft of the moving motor 19. Then, when the moving motor 19 is rotated, the base plate 16 is moved to a position corresponding to the inspection window 9 of each concrete formwork 6a to 6g through the meshing of the pinion 21 and the rack 20.

A square tube-shaped guide tube 22 is rotatably supported on the base plate 16 via a support shaft 23, and a support frame 24 is fixed to the base of the guide tube 22. A turning motor 25 as a turning means is mounted on the support frame 24, and a drive sprocket 26 is fixed to the motor shaft thereof. The driven sprocket 27 is fixed to the support shaft 23, and a chain 28 is mounted between the driven sprocket 27 and the drive sprocket 26. Then, when the turning motor 25 is rotated, the guide tube 22 is turned via both the sprockets 26 and 27 and the chain 28. As shown in FIG. 10 (a), an inactive position extending in the moving direction of the base plate 16 along the rail 14 and a concrete form 6 side as shown in FIGS. 1, 3 and 10 (b). And an operating position that extends toward it.

The channel-shaped telescopic arm 29 is movably inserted and supported in the guide cylinder 22 through a plurality of pairs of horizontal regulation rollers 30 and vertical regulation rollers 31, and the concrete formwork 6 is inspected at the tip thereof. A trumpet-shaped guide portion 32 that can be joined to the window 9 is provided. The retractable motor 33 is mounted on the lower surface of the guide cylinder 22, and a pinion 35 that meshes with a rack 34 on the lower surface of the telescopic arm 29 is fixed to the motor shaft of the retractable motor 33. When the retractable motor 33 is rotated, the telescopic arm 29 is moved through the meshing of the pinion 35 and the rack 34. And the telescopic arm 2
As shown by the solid line in FIG. 3, the reference numeral 9 is arranged at a position where the guide tube 22 is recessed, and as shown by a chain line in FIG.

The cable reel 36 is rotatably supported on the support frame 24 about a horizontal axis. The cable 37 is wound around the cable reel 36 so as to be able to be rewound, and the tip of the cable 37 is extended onto the telescopic arm 29 in the guide tube 22. The vibrating section 38 is attached to the tip of the cable 37, and a vibrator is provided inside the vibrating section 38. The rotation motor 39 is mounted on a side portion of the support frame 24, and its motor shaft has a drive gear 4 that meshes with a driven gear 41 on the reel shaft.
0 is fixed. Then, when the rotation motor 39 is rotated, the cable reel 36 is rotated through both gears 40 and 41, and the guide roller 42 on the support frame 24 is rotated.
The cable 37 is unwound or wound up via the, and the vibrating portion 38 is put in and taken out of the inspection window 9 of the concrete form 6.

The control box 43 is mounted on the upper surface of the guide cylinder 22 and has a pair of display lamps 44 and 45 on its side.
Are arranged. When the vibrating section 38 is moved in and out of the inspection window 9 of the concrete form 6 by the rotation of the cable reel 36, one display lamp 44 is turned on. Further, when vibration is applied to the poured concrete by the operation of the vibrating section 38, the other display lamp 45 is turned on.

Further, the concrete detecting sensor 1
The configuration of 0, 11, and 12 will be described in detail. As shown in FIG. 7, the mounting hole 46 is formed at the sensor mounting position of the concrete form 6, and the mounting boss 47 projects on the side surface opposite to the molding surface. It is set up. The sensor case 48 is the insulating plate 4
The rod-shaped sensing electrode 50 and the cylindrical ground electrode 51 are housed in the mounting boss 47 via the insulator 52 via the insulator 9. And both electrodes 50, 5
When the tip of No. 1 is exposed from the mounting hole 46 to the molding surface side of the concrete form 6 and the cast concrete reaches a level where it straddles both electrodes 50, 51, a sensing signal is generated based on the change in capacitance. Is output.

Next, the control circuit of the vibration imparting device constructed as described above will be explained. As shown in FIG.
A stabilized power supply device 53 is connected to the control device 56,
Electric power is supplied from the power supply device 53 to the control device 56. The control device 56 includes a concrete sensing sensor 10,
11, 12 and the sensing display device 54 are connected, and the sensor 1
When a sensing signal is input from 0, 11, and 12, the corresponding display unit of the sensing display device 54 is operated to display. Each vibration imparting mechanism 15 is connected to the control device 56, and the sensor 1
The vibration imparting mechanisms 15 are individually controlled based on the sensing signals from 0, 11, and 12. And the control device 5
The vibration applying mechanism 15 is set to any one of the three modes of the automatic mode, the single-acting mode, and the manual mode by the switching operation of the switching device provided in 6.

The manual operation switch 55 is a vibration applying mechanism 15.
First, when the automatic mode is set, all the operations of the vibration imparting mechanism 15 can be automatically controlled based on the detection signals of the concrete detecting sensors 10, 11, and 12. Further, when the single action mode is set, the movement of the vibration imparting mechanism 15 to the position corresponding to the inspection window 9 can be controlled by the operator's instruction regardless of the detection by the concrete detecting sensors 10, 11, 12. it can.
Other operations are the same as the automatic mode. When the manual mode is set, the vibration applying mechanism 15 moves,
The operation of the vibrating part 38 such as taking in and out of the inspection window 9 can be controlled by the operation switch 55.

Next, the operation of the vibration imparting device for the cast concrete constructed as described above will be described.
Now, FIG. 9 shows an operation when placing concrete and applying vibration in the seven concrete form frames 6a to 6g at a predetermined height position assembled along the tunnel hole 1. First, as shown in FIG. 9A, concrete is poured into the gap 7 between the primary peripheral wall 2 and the concrete form 6b from the concrete placing port 8 of the second concrete form 6b.

At this time, the vibration applying mechanism 15 is set to the automatic mode and operates as follows. That is,
As shown in FIG. 9 (a), when the lower concrete detection sensor 10 outputs a detection signal when the cockleat is thrown in, the guide cylinder 22 is arranged at an inactive position extending along the rail 14. Vibration imparting mechanism 1 by moving motor 19
5 is alternately located at a position corresponding to the concrete formwork 6b of the lower concrete detecting sensor 10 and the concrete formwork 6a, 6c on both sides thereof, that is, the inspection windows 9 of the first to third concrete formwork 6a to 6c. Be moved. Then, as shown in FIG. 10B, at the position corresponding to each inspection window 9, the turning motor 25 causes the guide cylinder 22 to swivel to an operating position extending to the concrete formwork 6a to 6c side.

In this state, as shown in FIG.
The retractable motor 33 causes the telescopic arm 29 to project from the inside of the guide cylinder 22. After that, as shown in FIG.
The cable reel 36 is rotated in the rewinding direction by the rotation motor 39. The vibrating part 38 is a concrete form 6a.
It is inserted into the gap 7 through the inspection window 9 of 6c and is hung down in the cast concrete. Then, as shown in FIG. 10 (e), the vibrating section 38 is activated to apply vibration to the poured concrete, and the concrete surface is averaged.

When concrete is poured and vibration is applied in this way, and a detection signal is output from the lower concrete detecting sensor 10 of the concrete form 6d, the concrete is poured and the concrete is controlled by the control device 56. The vibration applying operation is stopped, and the vibration applying mechanism 15 is sequentially returned from the state shown in FIG. 10 (e) to the state shown in FIG. 10 (a). Next, the operations shown in FIGS. 10 (b) to 10 (e) are sequentially performed, and as shown in FIG. 9 (b), the vibration applying mechanism 15 causes the inspection window 9 of the concrete form 6d and the inspection windows on both sides thereof. Vibration is applied from 9. At the same time, concrete is poured into the gap 7 from the concrete pouring opening 8 of the concrete form 6d.

As described above, when the lower concrete detecting sensor 10 detects concrete, the vibrating portion 3 is detected from the inspection window 9 corresponding to the sensor 10 and the inspection windows 9 on both sides thereof.
8 is inserted and vibration is applied. Then, concrete is sequentially added, and the sensor for detecting medium concrete 1
Even when 1 detects concrete, vibration is applied through the inspection window 9 corresponding to the sensor 11 and the inspection windows 9 on both sides of the inspection window in exactly the same manner as described above. Thus, every time the lower concrete detecting sensor 10 and the medium concrete detecting sensor 11 detect concrete, the vibration applying mechanism 15 applies vibration at the positions of the sensors 10 and 11 and the positions on both sides thereof. Perform surface averaging.

Then, the upper concrete detecting sensor 12
When the concrete is detected, the application of vibration from the inspection window 9 corresponding to the sensor 12 and the inspection windows 9 on both sides thereof is stopped, the windows 9 are capped, and the concrete pouring port 8 is capped. To be done. At this time, the vibration applying mechanism 15
Returns to the origin.

The vibration applying mechanism 15 is attached to the upper concrete detecting sensor 12 which does not detect concrete.
Vibration is applied and concrete is poured until the upper concrete detecting sensor 12 detects concrete while moving in the single action mode. In this way, concrete is placed in order from the bottom.

As described above, in the vibration imparting apparatus of this embodiment, the movement of the vibration imparting mechanism 15 to the position corresponding to the predetermined inspection window 9 and the movement of the vibrating portion 38 in and out of the inspection window 9 are automatically performed. Therefore, unlike the conventional method in which the operator leans out of the inspection window into the gap and operates the vibrating part of the vibration imparting mechanism, it is possible to perform the vibration imparting work on the poured concrete without manpower. It is easy, safe and hygienic.

Further, in this embodiment, since the vibrating portion 38 is movably supported in the guide cylinder 22 through the expandable arm 29, the vibrating part is guided by the guide cylinder 22 and the expandable arm 29. 38 can be smoothly taken in and out of the inspection window 9. Further, the vibration applying mechanism 15
Is moved along the rail 14, the guide tube 22
Is pivotally arranged in an inactive position extending along the rail 14, so that the guide cylinder 22 is reliably prevented from colliding with and damaging other structures in the tunnel hole 1 when the vibration imparting mechanism 15 moves. can do.

The present invention is not limited to the configuration of the above-mentioned embodiment, and for example, the vibration applying mechanism 15 is placed in contact with the side surface of the concrete form 6 opposite to the forming surface. The structure for applying vibration to concrete is adopted, or the vibration applying device of the present invention is used to apply the vibration of the placing concrete in the primary lining of the tunnel, or to add the vibration of the placing concrete in other structures. It is also possible to embody it by arbitrarily changing it within the scope not departing from the spirit of the present invention, such as performing the work or changing the order of placing concrete and applying vibration from the above-mentioned embodiment.

[0034]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it is possible to easily, safely, and hygienically perform vibration imparting work on cast concrete without manual labor. Play.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a tunnel lining site showing an example of use of a vibration imparting device for cast concrete embodying the present invention.

FIG. 2 is a schematic perspective view showing an assembled state of the formwork at the tunnel lining site.

FIG. 3 is an enlarged sectional view showing a vibration applying mechanism portion shown in FIG.

FIG. 4 is a side view of the vibration imparting mechanism.

5 is a cross-sectional view taken along the line AA of FIG.

6 is a partial bottom view of the vibration imparting mechanism of FIG.

FIG. 7 is a partial cross-sectional view showing the sensor for detecting concrete shown in FIG. 1 in an enlarged manner.

8 is a block diagram showing a control circuit of the entire vibration imparting device at the tunnel lining site in FIG. 1. FIG.

FIG. 9 is an explanatory diagram for explaining a concrete placing operation and a vibration applying operation at a tunnel lining site.

FIG. 10 is an explanatory diagram for explaining the operation of the vibration imparting mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tunnel hole, 4 ... Support frame, 6 ... Concrete formwork, 7 ... Gap, 9 ... Inspection window, 14 ... Rail, 15 ... Vibration imparting mechanism, 22 ... Guide tube, 25 ... Rotation motor as a rotation means, 37 ... Cable, 38 ... Vibration part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihisa Inagawa No. 144, 14 Shijo, Shinma-cho, Motosu-gun, Gifu Gifu Industry Co., Ltd. Industry Co., Ltd.

Claims (4)

[Claims] 1. A vibration imparting mechanism for imparting vibration to the poured concrete is disposed on the side surface of the concrete formwork opposite to the forming surface so as to be movable laterally along the concrete formwork. A vibration imparting device for pouring concrete, which is characterized in that 2. The pouring concrete according to claim 1, wherein the vibration imparting mechanism is provided with a vibrating section that can be put in and taken out from the molding surface side through a window provided in the concrete formwork. Vibration imparting device. 3. The vibration imparting device for pouring concrete according to claim 2, wherein the vibration imparting mechanism is provided with a guide cylinder for guiding the movement of the vibrating portion. 4. The vibration applying mechanism is provided with a turning means for turning the guide cylinder into an inactive position extending along the moving direction of the vibration applying mechanism and an operating position extending toward the concrete formwork side. The vibration imparting device for pouring concrete according to claim 3, wherein