JPH08158651A - Vibrator for concrete compaction - Google Patents

Abstract

PURPOSE: To easily insert a vibrator for concrete compaction in any place in placed concrete and to easily purge water and bubbles resided in ready-mixed concrete to the outside. CONSTITUTION: A sheath pipe 5 having a plurality of through holes 8 is run on the outer surface of a covered cable 2 connected to a vibration driving device for a vibrating member 1. Its tip is connected to the vibrating member 1. Thus, water and bubbles entered the sheath pipe 5 from the through holes 8 are elevated through a space between the inner surface of the sheath pipe 5 and the covered cable 2 for external exhaust.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrator used for extracting and compacting water and air bubbles accumulated in a lower portion or a haunch portion of green concrete placed in a concrete form.

[0002]

2. Description of the Related Art Conventionally, when compacting ready-mixed concrete cast in a formwork, a vibrator is inserted into the ready-mixed concrete and vibration or vibration of the vibrator causes water or bubbles accumulated in the ready-mixed concrete to move. I am trying to pull it out to the upper part of. For example, in the concrete pouring shown in FIG. 3, the left and right molds 21 are inclined so that the lower space is wide and the upper space is narrow, and the pipe material 22 is
And the separator 23, the reinforcing bars 24 for concrete reinforcement are arranged between the left and right molds 21, and compaction of the ready-mixed concrete placed in the left and right molds is performed as follows. The cable 26 connected to the vibrator 25 is slid on the reinforcing bars 24 arranged in the left and right molds 21 to insert the vibrator 25 into the fresh concrete, and the vibration of the vibrator 25 causes water and bubbles to flow into the fresh concrete. It is extracted from the inside and compacted.

[0003]

A conventional concrete compacting vibrator has a structure in which a cable for supplying an electric current to a drive unit is connected to a vibrating portion, and a reinforcing bar in a formwork interferes with the vibration. It was difficult to move the vibrator near the formwork, causing uneven compaction. In particular, it is difficult to move the vibrator to the haunch portion in the form, water and air bubbles in the fresh concrete cannot be sufficiently extracted, and the concrete strength and the concrete surface become poor. In addition, the vibrator may be caught in the reinforcing bars in the formwork and the vibrator may not come out of the ready-mixed concrete. Therefore, the present invention aims to make it possible to easily insert the vibrator into any place in the cast concrete, and to easily draw out water and bubbles accumulated in the fresh concrete to the outside. And

[0004]

In the vibrator for concrete compaction according to the present invention, which has achieved the above object, a vibration driving device incorporated in a vibrating member is connected to a coated cable at a rear end position of the vibrating member, and an outer periphery thereof is provided. A sheath tube having a plurality of through holes is provided on the outer circumference of the coated cable. A space was provided between the sheath tube and the coated cable so that water and air bubbles could pass therethrough. Further, a connector connecting portion is provided at the rear end of the coated cable, and the sheath tube can be easily attached and detached by removing the cable from the coated cable. Furthermore, the vibrating member is formed into a substantially cylindrical shape,
A plurality of grooves, which are deeper from the front end side toward the rear end side, are provided on the outer periphery thereof to guide water and bubbles in the fresh concrete to the upper part.

[0005]

[Operation] When the water and air bubbles accumulated in the ready-mixed concrete placed in the form are extracted by using the above concrete compaction vibrator, the connector portion connecting the coated cable and the cable is After separating, the sheath tube is passed through the outer circumference of the coated cable and the tip thereof is connected to the vibrating member, and then the coated cable and the cable are connected at the connector portion. In this way, the vibrator is prepared, and the worker holds the rear end side of the sheath pipe and inserts the vibrator's vibrating member into an arbitrary position of the pouring concrete, and the water and bubbles in the fresh concrete are extracted to the outside by the vibration of the vibrating member. . in this case,
Since the outer circumference of the coated cable is covered with the sheath tube, that portion does not bend, and the vibrator can be easily inserted at an arbitrary position in the mold and near the mold. Also,
Water and air bubbles in the fresh concrete due to the vibration of the vibrating member,
It enters inside through the through hole of the sheath tube, rises through the space between the sheath tube and the coated cable, and flows out to the outside.

[0006]

EXAMPLE An example of a concrete compacting vibrator of the present invention will be described with reference to FIGS. The vibrating member 1 of the vibrator is formed in a substantially cylindrical shape and has a tapered tip portion, and a vibration driving device is provided inside the vibrating member 1. The vibration driving device and the coated cable 2 that supplies current to the vibration driving device are connected at the rear end position of the vibration member 1. Grooves 4 are provided on the outer periphery of the vibrating member 1 so as to gradually deepen from the front end to the rear end, and the grooves 4 guide water and bubbles upward. Further, a thread groove 3 is provided at the rear end of the vibrating member 1, and a sheath tube 5 described later is detachably attached.

The coated cable 2 has its outer circumference covered with a flexible tube to prevent the cable from being damaged by ready-mixed concrete or the like. A connector connecting portion is provided at the rear end of the covered cable 2, and the connector 7 provided at the end portion of the cable 6 can be connected to the connector connecting portion. The sheath pipe 5 connected to the rear end of the vibrating member 1 is formed of a thin metal pipe or a vinyl chloride pipe, and the length of the sheath pipe is such that the worker can place the vibrating member 1 connected to the sheath pipe 5 at an arbitrary position on the concrete poured. The length is made such that it can be inserted, and the inner diameter of the sheath tube 5 is made slightly larger than the outer diameter of the coated cable 2 so that water and air bubbles can pass between them. Further, a large number of through holes 8 are provided on the outer circumference of the sheath pipe 5, and water and bubbles can flow into the sheath pipe 5 through the through holes 8. A screw is provided on the inner circumference of the tip of the sheath tube 5 and is detachably connected to the thread groove 3 at the rear end of the vibration member 1. The vibrating member 1 and the sheath tube 5 are not limited to being connected by a screw structure, but may be bolted or by other connecting means.

Using the concrete compacting vibrator having the above construction, the work for removing water and air bubbles accumulated in the haunch portion in the mold shown in FIG. 2, for example, is as follows. In the formwork of FIG. 2, the formworks 11 on both sides are arranged so that the bottom is wide and the top is narrow, the formwork 11 is fixed by the pipe material 12 and the separator 13, and the formwork 11 on both sides is fixed.
Reinforcing bars 14 for reinforcing concrete are arranged inside. In the formwork assembled in this way, the worker holds the sheath pipe 5 in a state where the sheath pipe 5 is connected to the vibrating member 1, inserts the vibrating member 1 into the haunch portion of the fresh concrete, and vibrates the vibrating member 1 to produce the vibrating member 1. Water and air bubbles in the concrete are extracted from the through hole 8 of the sheath pipe 5 to the upper part through the space between the sheath pipe 5 and the coated cable 2. Then, when the inserting position of the vibrating member 1 is changed and the whole water and air bubbles accumulated in the ready-mixed concrete are extracted to complete the work, the connection between the covered cable 2 and the cable 6 is disconnected, and the sheath pipe 5 is removed.

[0009]

According to the present invention, since the sheath pipe can be attached to the vibrating member, the vibrating member can be easily inserted up to an arbitrary position in the concrete form, particularly near the form of the haunch part, and the whole area of the cast concrete. And water and air bubbles near the form can be easily extracted. Further, the water and bubbles moved in the ready-mixed concrete by the vibrating member enter the inside of the sheath tube through the through hole of the sheath pipe, and the water and bubbles moved through the space between the sheath pipe and the covered cable are removed. It can be reliably lifted up and extracted to the outside, and the compaction of ready-mixed concrete becomes sufficient. As described above, water and bubbles remaining on the surface of the mold can be reduced, and high-quality concrete pouring can be performed.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a concrete compacting vibrator of the present invention, and an AA sectional view and a BB sectional view thereof.

FIG. 2 is an explanatory diagram showing a concrete compacting operation using the vibrator of the present invention.

FIG. 3 is an explanatory view showing a concrete compacting operation using a conventional vibrator.

[Explanation of symbols]

 1 Vibration member 2 Covered cable 4 Groove 5 Sheath pipe 6 Cable 8 Through hole

Claims (3)

[Claims] 1. A vibration driving device built in a vibrating member is connected to a coated cable at a rear end position of the vibrating member, and a sheath pipe having a plurality of through holes on an outer periphery has a space on the outer periphery of the coated cable. A vibrator for concrete compaction, characterized in that the front end of the sheath pipe is detachably attached to the rear end of the vibrating member. 2. The vibrator for compacting concrete according to claim 1, wherein a connector connecting portion is provided at a rear end of the covered cable so as to be connectable to the cable. 3. The vibrator for concrete compaction according to claim 1, wherein the vibrating member is formed in a substantially cylindrical shape, and a plurality of grooves are formed on the outer periphery of the vibrating member so as to become deeper from the front end side toward the rear end side.