JPH07223Y2 - Exposed Rebar Keren Machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an exposed reinforcing bar shaving machine for removing rust and cement paste of reinforcing bar exposed from a concrete structure for future replenishment.

[Prior Art] Conventionally, removal of rust on exposed reinforcing bars and cement paste, so-called keren work has been performed manually by a wire brush or by a sander to which a wire brush is attached.

[Problems to be solved by the invention] In these conventional keren work, a large step, uneven finish and unevenness, poor work posture, and removing pieces scattered and dustproof glasses are required. There is a problem such as poor performance.

In addition, as a device to remove the concrete attached to the binding bolts or shafts used at construction sites, etc., insert the cylinder with the fine metal wire inside into the bolt or shaft with the concrete attached, and use the motor to rotate the cylinder. It has been proposed to remove concrete adhered to a bolt or a shaft by rotating with a fine metal wire (see Japanese Utility Model Publication No. 40-15399). However, in this device, one end of the cylindrical body is substantially closed and the bolt or the shaft cannot be inserted, and therefore, the length is short like the binding bolt or the shaft used at the construction site. It is possible to remove concrete attached to objects, but it cannot be used to remove concrete attached to relatively long objects such as exposed reinforcing bars over the entire length of the reinforcing bars.

An object of the present invention is to provide an exposed reinforcing bar shaving machine with a low yield, a uniform finish, and improved workability.

[Means for Solving the Problems] According to the present invention, a pipe having an exposed rebar inserted through it, one end of which is detachably connected to an impact wrench, and the other end of which is provided with a flange, and which is detachably attached to the flange of the pipe. The rotating brush has an outer cylinder made of punching metal, and one end of the outer cylinder is notched at a portion facing a guide groove described later and is covered with an inner plate through which an exposed reinforcing bar can be inserted. The other end is covered with an outer plate through which the exposed reinforcing bar can be inserted, and a plurality of radial guide grooves are defined between the both side plates by a pair of brush guides welded to the outer cylinder. Provided is an exposed reinforcing bar shaving machine in which a liner and a channel brush are detachably housed in the guide groove.

[Operation] In the exposed rebar scraping machine configured as described above,
The outer end of the exposed reinforcing bar is inserted into the rotating brush, and the impact wrench is rotated forward, for example, to move forward, and the rust on the exposed reinforcing bar and the cement paste are scraped off with the rotating channel brush.
Then, when the rotary brush reaches the inner end portion of the exposed reinforcing bar or a required position, the impact wrench is reversed to move backward, and the channel brush similarly scrapes off the rust and cement paste.

Further, the outer diameter of the exposed reinforcing bar is adjusted by adjusting the position of the channel brush in the radial direction with liners having different thicknesses.

Further, the liner and the channel brush are replaced by removing the rotary bra from the flange of the pipe and pulling out the liner and the channel brush from the notch of the inner plate of the rotary brush.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

Referring to FIG. 1, the keren machine of the present invention comprises an impact wrench 1 and a wrench socket 2 which is detachably attached to the wrench 1.
And a pipe 3 having one end fixed to the socket 2 and having an inner diameter through which the exposed reinforcing bar 18 of the existing structure 17 can be inserted, and a rotary brush attached to the other end of the pipe 3 and indicated by reference numeral A. Has been done. Reference numeral 16 in the figure denotes a metal fitting for slidably supporting the pipe 3, which is fixed to a bogie (not shown) as necessary and used for forward and backward movement of the keren machine.

2 and 3, a flange 4 is welded to the end of the pipe 3, and the rotary brush A is attached to the flange 4 by a plurality of (four in the illustrated example) hexagon bolts 5 with holes. ing.

The outer cylinder 6 formed of punching metal of the rotary brush A has an inner plate 7 welded to the flange 4 side and an outer plate 8 welded to the opposite side, both of which are inner holes into which exposed rebars 18 can be inserted. 9 is provided.

Between these both side plates 7 and 8, a plurality of (4 in the example shown in the figure, evenly arranged cylindrical) radial guide grooves 11 are defined by a pair of brush guides 10 and 10 welded to the outer cylinder 6, Inner plate 7
The portion facing the guide groove 11 is cut out. Then, the weld nut 12 provided on the inner plate 7 is
The bolt 5 is screwed.

In the guide groove 11, the channel brush 13 shown in FIG.
Is stored so that the wire 14 contacts the exposed rebar 18,
A liner 16 is interposed between the case 15 and the outer cylinder 6 so that the position of the wire 14 in the radial direction can be adjusted within a range of 5 mm, for example.

At the time of work, the outer end portion of the exposed reinforcing bar 18 is inserted into the rotating brush A, the impact wrench 1 is rotated forward, for example, and moved forward, and the rust of the exposed reinforcing bar 18 and the cement paste are scraped off by the wire 14 of the rotating channel brush 13. . And exposed rebar 18
When the inner end portion or the required position is reached, the impact wrench 1 is rotated in the reverse direction to move backward, and the rust and cement paste are similarly scraped off. To replace the liner 16 and the channel brush 13, remove the bolt 5 and attach the rotary brush A to the pipe 3.
Of the inner plate 7 from the flange 4 of the liner 1
6. Pull out the channel brush 13.

Since this scraping is performed by the impact rotation of the impact wrench 1, a significantly low rotation is sufficient as compared with the conventional sander, and therefore, the scraps of the scraped off are very little scattered.

Further, since the rotating brush A is rotated forward and backward to move forward and backward, the entire circumference of the reinforcing bar can be finished uniformly and satisfactorily.

[Advantages of the Invention] Since the present invention is configured as described above, it is possible to reduce the step rate to about 10% as compared with the conventional manual work.

Further, since the work posture is almost constant and there is no need to enter the rebar assembly, workability can be greatly improved.

In addition, rust and cement paste can be scraped off from the entire length of the reinforcing bar of a required length simply by using a pipe having a length corresponding to the length of the exposed reinforcing bar.

Further, the outer diameter of the exposed reinforcing bar can be adjusted by adjusting the position of the channel brush in the radial direction with liners having different thicknesses without changing the channel brush.

Moreover, the liner and the channel brush can be easily replaced by simply removing the rotary brush from the flange of the pipe.

Further, since the structure is simple using an impact wrench, it can be implemented at low cost.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II of FIG. 3 showing a rotary brush, and FIG. 3 is an upper half portion II of FIG. -II line sectional view, the drawing which shows the III-III line sectional view of FIG. 2 in the lower half part, FIG. 4 is a perspective view which shows a channel brush. A: rotating brush, 1 impact wrench, 3 pipe, 4 flange, 6 outer cylinder, 7 inner plate, 8
…… Outside plate, 10 …… Brush guide, 11 …… Guide groove, 13
…… Channel brush, 16 …… Liner, 18 …… Exposed rebar

Claims (1)

[Scope of utility model registration request] 1. A rotary brush comprising a pipe having an exposed rebar inserted therethrough, one end of which is detachably connected to an impact wrench, and the other end of which is provided with a flange, and a rotary brush which is detachably attached to the flange of the pipe. Has an outer cylinder formed of punching metal, one end of the outer cylinder is cut out at a portion facing a guide groove described later, and is covered with an inner plate through which the exposed reinforcing bar can be inserted, and the other end is covered with the exposed reinforcing bar. A plurality of radial guide grooves are defined between the both side plates by a pair of brush guides welded to the outer cylinder, and a liner and a channel brush are provided in the guide grooves. An exposed rebar keeling machine characterized by being detachably stored.