JPH05106206A - Concrete finishing method and its equipment - Google Patents

Abstract

PURPOSE:To shorten a standby time after placing concrete, and enable strength to be regulated by applying oscillation to non-hardened, concrete, and by absorbing water forcibly from the surface of the concrete, to level the surface. CONSTITUTION:At a contact section with concrete A, a concrete finishing equipment is composed of a finish trowel provided with a water absorbing pipe 6 having a water absorbing section consisting of a water absorbing channel and a penetration hole 9, filters 2, 3 contained removably in the pipe 6, an outlet 4 to be communicated with a suction pump 17, and a pair of vibrators 5. Then, with the suction force of the suction pump 17, from the surface of non-hardened concrete through the water absorbing section, water is forcibly absorbed, and with the filters 2, 3, concrete component, dust, and the like to the outlet 4 are caught. Besides, with the vibrators 5, oscillation is generated, and the oscillation is applied to the concrete A, and at the same time, the float 1 is moved in contact with the surface of the concrete A, and it is levelled, and the surface of the concrete A is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete finishing method and apparatus for smoothly finishing the surface of uncured concrete.

[0002]

2. Description of the Related Art Conventionally, the surface of uncured concrete has been manually finished by plastering. This work is performed at least 3 to 4 hours after the concrete is struck, and the length is 60
It was carried out by sweeping the uncured concrete surface with a leveling plate of about cm. The waiting time of 3 to 4 hours before the start of plastering work is the time required for the concrete to become a semi-hardened state by natural drying, and before that, a large amount of water came out on the concrete surface, Is not suitable for plastering work.

[0003]

As described above, in the past,
There has been a problem that waiting time of several hours is required for the cast concrete to reach a semi-hardened state suitable for leveling the surface. Moreover, it is impossible to adjust the strength of the concrete by the conventional finishing method because the density of the concrete depends on its own weight.

An object of the present invention is to provide a concrete finishing method and an apparatus therefor capable of significantly reducing the waiting time required for finishing the surface of uncured concrete and adjusting the strength of the concrete.

[0005]

In order to achieve the above object, the concrete finishing method of the present invention applies vibration to uncured concrete, and at the same time, the concrete surface is forcibly absorbed by water from the surface of the concrete. Characterized by smoothing.

In order to achieve the same object, the concrete finishing apparatus of the present invention is equipped with a water absorbing pipe which is moved in contact with the surface of uncured concrete and has a water absorbing portion at the contact portion with the concrete. Finishing iron, a filter detachably housed in the water absorbing pipe, a discharge port provided in communication with the water absorbing pipe in the finishing iron and communicating with a suction pump, and a vibrator connected to the finishing iron. It is equipped with.

Further, in order to provide a concrete finishing device which is easy to handle when finishing the surface of uncured concrete and can prevent damage to the finished surface, it is preferable to provide a directional switching valve at the discharge port.

Further, in order to enable movement of the concrete finishing device for finishing the surface of uncured concrete without requiring a special driving device, the vibrator is attached to the finishing iron. It may be connected so as to be rotatable about an axis by a predetermined angle.

[0009]

According to the concrete finishing method of claim 1, when smoothing an uncured concrete surface,
By forcibly sucking water from the surface of this concrete and promoting the hardening of the concrete, the vibration given at the same time as this water absorption destroys the density of this concrete while collapsing the water suction passages accompanying the forced water absorption. Increase.

In the concrete finishing device according to the second aspect, the finishing iron is moved in contact with the surface of the uncured concrete to smooth the surface. The suction force of the suction pump connected to the discharge port of the finishing iron causes the finishing iron to forcibly suck water from the surface of the uncured concrete through the water absorbing portion of the water absorbing pipe. The filter housed in the water absorption pipe captures concrete components, dust, etc. that are sucked into the water absorption part and are directed to the outlet. Further, this filter is taken out from the water absorption pipe after the completion of the finishing work, and after being subjected to a regeneration treatment, is housed in the water absorption pipe again or replaced with a new one. The vibrator generates vibration due to its operation, and transmits this vibration to the finishing iron. Therefore, by simultaneously operating the vibrator and suction pump, it is possible to give vibration to the uncured concrete through the finishing iron and finish the concrete surface while forcibly sucking water from the concrete surface with this finishing iron. it can.

The directional switching valve in the concrete finishing device according to the third aspect of the present invention performs a switching operation such that the suction force of the suction pump is exerted on the water absorbing pipe or the suction force is not exerted on the water absorbing pipe. Then, the suction force of the water absorbing pipe is eliminated, and the finishing iron can be easily separated from the finished concrete surface. Moreover, since the direction switching valve is provided in the finishing iron, the switching can be performed at hand without being restricted by the suction pump located away from the finishing iron.

Since the vibrator in the concrete finishing device according to the fourth aspect of the present invention is rotatable by a predetermined angle, the vibrator can be positioned on the front side or the rear side of the traveling direction of the finishing iron. When the vibrator is rotatably arranged on the front side in the traveling direction of the finishing iron, the finishing iron that is vibrated by the vibrator moves forward while giving vibration to the concrete. When rotated to the side, the finishing trowel retracts by itself while giving vibration to the concrete.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, a concrete finishing device for carrying out the method of the present invention includes a finishing iron 1, filters 2 and 3, a discharge port 4, and a pair of vibrators 5.

A water absorption pipe 6 provided in the finishing iron 1 has a pipe body 6a, and end pipes 6b (see FIG. 5) detachably screwed to both ends of the body 6a, respectively.
End plates 6c (see FIG. 5) detachably screwed into the left and right open ends of the end pipes 6b, respectively, and
It is composed of a pair of central leveling plates 7a and a pair of end leveling plates 7b. In FIG. 5, reference numeral 6d indicates a nut for turning operation, which is welded to the center of the outer surface of the end plate 6c.

A pair of central leveling plates 7a are slightly welded in the front-rear direction and are welded to the lower portion of the pipe body 6a so as to extend in the lengthwise direction thereof. The pair of end leveling plates 7b are welded to the lower portions of the end pipes 6b with a slight distance in the front-rear direction. The lower surface of each of the leveling plates 7a and 7b is
It is formed by a horizontal surface, which is suitable for leveling concrete surfaces. Further, the end leveling plate 7b is provided when the end pipe 6b is attached to the pipe body 6a.
A pair of central leveling plates 7a fixed to a are connected to the ends of the plates.

The water-absorbing pipe 6 has its leveling plates 7a, 7
b is moved in contact with the surface of the uncured concrete A, and a water absorption groove 8 and a through hole 9 as a water absorption portion are provided in the lower portion of the water absorption pipe 6 which is a contact portion with the concrete A. There is. As shown in FIGS. 1 and 3, the water absorption groove 8 is formed between the center leveling plates 7a facing each other in the front-rear direction and between the end leveling plates 7b facing each other. The through holes 9 communicate with the water absorption groove 8 and the insides of the pipe body 6a and the end pipe 6b, respectively, and are provided under the pipe body 6a and the end pipe 6b, respectively. The through holes 9 are, for example, through holes having a diameter of about 3 to 5 mm, and are provided at intervals of 50 mm.

The finishing iron 1 is provided with a collecting pipe 10 which is shorter than the water absorbing pipe 6, and the two pipes 6 and 10 are connected to each other through a large number of suction pipes 11. The suction pipes 11 are connected at regular intervals in the lengthwise direction of the water suction pipe 6, and the suction pipes 11 and the collecting pipe 10 can make the suction pressure in each water suction portion uniform. Further, as shown in FIG. 4, end plates 10a for closing the opening ends on the left and right sides of the collecting pipe 10 are detachably screwed and attached.

Further, the finishing iron 1 is provided with a vibrator mounting body 12. As shown in FIG. 1, the mounting body 12 is formed by removing the lower portion of a pipe whose both ends are open. The mounting body 12 is located at the center of the pipe body 6a in the longitudinal direction and is welded to the upper portion of the body 6a. ing. In FIG. 1, reference numeral 13 is a stopper protrusion that is welded to the upper surface of the pipe body 6a to restrict the rotation of a vibrator described later. As shown in FIGS. 3 and 4, a notch groove 14 is provided at both ends of the vibrator mounting body 12, and the groove 14
Rotation allowance grooves 15 are formed so as to extend in the circumferential direction so as to be continuous with the innermost end of each.

The water absorbing pipe 6 of the finishing iron 1 having the above-mentioned structure accommodates the filter 2 and the collecting pipe 1
The filter 3 is also stored at 0. For these filters 2 and 3, sponges such as urethane foam having open cells are used. The filter 2 can be attached to and detached from the pipe body 6a by removing the end pipe 6b or the end plate 6c, and the filter 3 can be attached to and removed from the collecting pipe 10 by removing the end plate 10a.

The discharge port 4 is provided at the central portion in the length direction of the collecting pipe 10 in the finishing trowel 1, and the direction switching valve 16 is connected to this. Although not shown, the direction switching valve 16 has first to third ports, the first port of which is connected to the discharge port 4 and the second port of which is a flexible hose 25.
Is connected to the suction pump 17 via and the third port is open to the atmosphere. And the direction switching valve 16
By rotating the handle-type operation portion 16a of the portable telephone by 90 °, switching is performed so that the first port communicates with the second port or the first port communicates with the third port. It is like this. A water-sealed vacuum pump is used as the suction pump 17.

The pair of vibrators 5 are connected to both ends of the vibrator mounting body 12, respectively. That is, the vibrator 5 uses the inner surface of the vibrator mounting body 1 as a guide to the end of the vibrator mounting body 12.
A vibrator base 18 housed so as to be rotatable by a predetermined angle along the circumferential direction of 2, a cylindrical portion 19 protruding from the upper surface of the base 18 and passing through the rotation permitting groove 15, and the cylindrical portion 1.
A vibrator main body 20 provided by connecting the lower end portion to 9
And the operation handle 2 attached to the upper part of the main body 20
1 and are formed.

A vibration generator (not shown) is built in the vibrator body 20, and the start / stop of this device is controlled by a switch 22 provided on an operation handle 21. The vibration generator converts the rotational force of the motor into linear reciprocating motion to generate vibration along the axial direction of the vibrator 5.

A weight portion 23 is formed so as to project on one side surface of the vibrator base 18. This weight 23
Although it is provided as an auxiliary in order to make it easier to move the entire finishing device, it may be omitted. The vibrator 5 is attachable / detachable through the end surface of the vibrator mounting body 12. In the figure, 24 is a vibrator mounting body 12 for preventing the vibrator 5 from coming off after mounting.
2 shows a removable retaining bolt that is attached to the end of the.

In the concrete finishing device having the above-mentioned structure, after the concrete is hit, the uncured concrete A
Wait until the condition of the
About a minute) It is moved in contact with the surface of the concrete A and is used for finishing work for smoothing the surface of the concrete A. At this time, since the operation handle 21 of the vibrator 5 is gripped and operated, the finishing device does not fall, and the vibrator 5 is operated together with the suction pump 17. Therefore, this finishing device forcibly absorbs water from the surface of the uncured concrete A while vibrating it, and smoothes the surface.

More specifically, the suction force of the suction pump 17 reaches the water suction pipe 6 through the hose 25, the direction switching valve 16, the collecting pipe 10 and the suction pipe 11, so that the water suction groove 8 and the through hole of the water suction pipe 6 are provided. The water contained in the concrete A is forcibly sucked from the surface of the uncured concrete A through 9. In this way, the water is forcibly removed from the concrete A without being dried naturally, so that the hardening of the concrete A can be promoted. In this case, depending on the moving speed of the finishing device, the concrete A
The curing speed of can be adjusted. Moreover, the vibration generated by the vibrator 5 in the axial direction vibrates the entire finishing device and is applied to the uncured concrete A through this device.

Therefore, despite the formation of water suction passages in the uncured concrete A due to the forced water absorption, it is possible to increase the density of the concrete by collapsing the passages one after another due to the vibration. At the same time, the separation of concrete A and water is promoted to facilitate the water absorption. And, the finishing device has the leveling plate 7a,
Since 7b is moved in contact with the surface of uncured concrete A, the surface of concrete A can be smoothed by each of the leveling plates 7a and 7b regardless of forced water absorption under the vibration as described. it can.

By simultaneously operating the vibrator 5 and the suction pump 17 in this manner, vibration is applied to the uncured concrete A through the finishing iron 1 and
The finishing iron 1 can finish the surface of the concrete A while forcibly sucking water from the surface of the concrete A, so that the waiting time can be significantly shortened to, for example, about 1/5 of the conventional case. Moreover, since the density of the concrete A is increased, its strength can be improved.

Further, since the vibrator 5 of the concrete finishing device having the above-mentioned structure can be rotated around the axis of the finishing iron 1 by a certain angle, it can be positioned on the front side or the rear side in the traveling direction of the finishing iron 1. it can. When the vibrator 5 is rotatably arranged on the front side in the traveling direction of the finishing iron 1, the finishing iron 1 which is vibrated by the vibrator 5 moves forward while vibrating. That is, due to the forward leaning of the vibrator 5, the center of gravity of the entire finishing device moves to the front side, and the forward component force increases,
The entire finishing device is directed forward by the vibration of the vibrator 5 and moves by itself. Further, for the same reason, when the vibrator 5 is pivotally arranged on the rear side in the traveling direction of the finishing iron 1, the finishing iron 1 retreats by itself while vibrating.

As described above, since the concrete finishing device can move by itself by utilizing the vibration of the vibrator 5, the movement of the concrete finishing device at the time of finishing the surface of the uncured concrete A requires a special driving device. Can be implemented without.

By rotating the operating portion 16a of the direction switching valve 16 of the concrete finishing device,
The suction force by the suction pump 17 can be applied to the water absorbing pipe 6 or the suction force can be switched so as not to reach the water absorbing pipe 6. Therefore, it is possible to prevent the finishing iron 1 from being held in an adsorbed state on the finished concrete surface by eliminating the suction force of the water absorbing pipe 6. Therefore, it is possible to prevent damage to the finished concrete surface and easily separate the finishing iron 1 of the concrete finishing device from this surface. Moreover, the direction switching valve 1
Since 6 is provided in the finishing iron 1, the switching can be performed at hand, and it goes to the installation location of the suction pump 17 located away from the finishing iron 1 one by one, and the suction force of the water absorption pipe 6 is lost. No hassle.

Further, in the use of this concrete finishing device, a part of the uncured concrete A or dust on the surface is sucked into the water absorption pipe 6, and these are captured by the filter 2 filled in the water absorption pipe 6. At the same time, even if it passes through the water absorption pipe 6, it is captured by the filer 3 filled in the collecting pipe 10. Therefore, concrete or the like can be prevented from entering the direction switching valve 16 and the suction pump 17.

After using this finishing device, the filters 2 and 3 are fed from the water absorbing pipe 6 and the collecting pipe 10.
Are taken out and these are washed with water. Thereby,
The captured concrete does not cause the filters 2 and 3 to solidify and render the finishing device unusable, and the filters 2 and 3 can be regenerated and used. At that time, the pipes 6 and 10 are also washed with water to prepare for the next use.

The method and apparatus of the present invention can be used for finishing on-site produced concrete as well as on factory-produced concrete. In finishing on factory-produced concrete, the vibrator is separated from the finishing iron. It is also possible to connect it to and apply vibration to the uncured concrete. The method and apparatus of the present invention can also be applied to finishing the surface of concrete cast for tunnel linings. Alternatively, the direction switching valve may be electromagnetically operated and switched by remote control.

[0034]

Since the present invention is constructed as described above in detail, it has the following effects.

In the concrete finishing method of the first aspect and the concrete finishing device of the second aspect, since water is forcibly sucked from the concrete surface to accelerate hardening of the concrete, it is possible to finish the surface of the uncured concrete. The required waiting time can be greatly reduced,
In combination with the adjustment of the water content of the concrete due to the water absorption, the density of the concrete is increased by sequentially destroying the water suction passage accompanying the forced water absorption by the vibration given at the same time as the water absorption, so that the strength of the concrete is adjusted it can.

In the concrete finishing device of the third aspect, a direction switching valve is provided at the discharge port which is provided in the finishing iron in communication with the water absorption pipe and is also in communication with the suction pump. Since adsorption is prevented, damage to the finished concrete surface can be prevented, and the switching valve can be switched by hand, which facilitates handling.

In the concrete finishing device of the fourth aspect, a vibrator connected to the finishing iron is connected to the finishing iron so as to be rotatable about its axis, and the vibration of the vibrator is utilized to complete the finishing device. Since it is possible to move by itself, the concrete finishing device can be moved when finishing the surface of uncured concrete without requiring a special drive device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the configuration of a concrete finishing device according to an embodiment of the present invention, taken along line ZZ in FIG.

FIG. 2 is a front view showing the configuration of the concrete finishing device according to the embodiment.

FIG. 3 is a plan view showing the configuration of the concrete finishing device according to the embodiment with a part of the vibrator removed.

FIG. 4 is a perspective view showing a part of the concrete finishing device according to the embodiment.

FIG. 5 is a cross-sectional view showing one end of the water absorption pipe according to the embodiment.

[Explanation of symbols]

1 ... Finishing iron, 2 ... Filter, 4 ... Discharge port, 5 ... Vibrator, 6 ... Water absorbing pipe, 8 ... Water absorbing groove (water absorbing portion), 9
... through hole (water absorption part), 16 ... direction switching valve, 17 ... suction pump.

Claims (4)

[Claims] 1. A concrete finishing method, characterized in that uncured concrete is vibrated and the surface of the concrete is smoothed while forcibly absorbing water from the surface of the concrete. 2. A finishing trowel that is moved in contact with the surface of uncured concrete and has a water absorbing pipe having a water absorbing portion at a contact portion with the concrete, and a filter detachably housed in the water absorbing pipe. A concrete finishing device, comprising: a discharge port provided in the finishing iron so as to communicate with the water absorption pipe and communicating with a suction pump; and a vibrator connected to the finishing iron. 3. The concrete finishing device according to claim 2, wherein the outlet has a direction switching valve. 4. The concrete finishing device according to claim 2, wherein the vibrator is connected to the finishing iron so as to be rotatable around its axis by a predetermined angle.