JPH08284392A - Concrete grinder with dust collector - Google Patents

Abstract

PURPOSE: To remove ground dust resulting from the removal of laitance. CONSTITUTION: In a rotary grinder 10 in which support shafts provided with cutter blades having buried titanium tips or the like at every plurality of sheets, are extended to the peripheral edges of oppositely positioned flywheels at every specified distance, installed in the lower part of a vertical box 1 opened at the bottom, a part of the cutter blades exposed at the lowermost level is arranged to project from the opening and the rotary shaft 4 of the rotary grinder 10 is connected to a motor 11 for the cutter, arranged at the upper part of the vertical box 1 through a transmission mechanism like a gear. A part of a dust collecting hose 17 connected to a dust collector 16 separately arranged and also connected to the suction inlet opened at the side frame of vertical box, is joined to an operating pipe lever 18 protruded from the vertical box. And the laitance-dust ground by the cutter blades is forcibly sucked into the dust collector 16 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete grinder equipped with a dust collector for use in the treatment of a deepance of concrete.

[0002]

2. Description of the Related Art Generally, in a civil engineering and construction site where concrete is poured, ground surface adjustment work of concrete (steps etc. generated at joints of control panels, etc. are smoothly ground,
In the work of removing), and the work of removing the latance (such as slag and slag that has hardened due to the rise of impurities) before the concrete splicing, the wire brush, It was extremely troublesome because it was manually peeled off using a tool such as a glass and then swept away with a broom. For this reason, recently, a machine equipped with a rotary grinding body composed of a cutter blade group that rotates at a high speed by driving a motor has been transformed into a mechanical work for pressing the surface to be ground of concrete.

[0003]

However, in this type of device (concrete grinder), since the cutter blade scrapes the concrete surface at high speed, dust is blown to the front or rear of the machine and the surrounding area is covered with dust. Workers are forced to wear dust-proof masks and eyeglasses so that they do not inhale dust and cause diseases such as pneumoconiosis, which is troublesome and hinders work efficiency. This is the same even if the work site is a structure on the ground (buildings, railways, highways, bridges, etc.), but in particular, the laitance removal work that is indispensable in concrete placing work on the deep foundation of a transmission line tower (large tower) Then, the place is diameter 3 ~
Since it is carried out in a deep foundation pile of 4 m, more dust than necessary is needed, so a conventional concrete grinder without a dust suction device cannot handle it. Moreover, this deep foundation is troublesome because many reinforcing bars are finely planted, so that the concrete grinder shown in FIG. 9 (see, for example, Japanese Utility Model Publication No. 54-18008) is conventionally known. Like,
In the type in which the rotary grinding body a and the drive motor b are arranged at the front and rear positions (planar) of the machine body c, and the fixed gripping handles d and e are arranged at the front and rear of the machine body, the width is inevitably wide and the narrow arrangement is narrowed. It is difficult to insert between the streaks, and the dust f of the scraped concrete is scattered and polluted to the surrounding (front in the drawing) because it is not equipped with a dust collector.

In view of the above situation, the present invention has at least the rotary grinding body and the cutter motor arranged vertically in two stages to obtain a narrow case, and combines the case with a dust collecting mechanism to solve the above problems. It is an object to provide a compact concrete grinding machine with a dust collector to be solved.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a flywheel is provided in which a plurality of cutter blades each having a titanium tip embedded at the tip end thereof are arranged in a plurality of units in a lower portion of a vertical housing having an opened lower end, and a spindle is opposed to each other. A rotary grinding body formed by arranging a peripheral edge of the rotary grinding body at a predetermined interval is arranged so that a part of the cutter blade facing the lowermost part protrudes from the opening, and the rotary shaft of the rotary grinding body is arranged above the vertical casing. Connect a part of the dust collecting hose connected to a separately placed dust collector that connects to the cutter motor that is installed via a transmission mechanism such as a gear and that connects to the suction port provided on the side of the frame of the vertical housing. The operation handle is a pipe-shaped operation handle that is projected on the housing.

Further, in the lower part of the vertical casing having an opening at the lower end, a spindle for arranging a plurality of cutter blades with titanium tips embedded at the tip is provided at predetermined intervals around the peripheral edge of the opposing flywheel. The formed rotary grinding body is arranged so that a part of the cutter blade facing the bottom protrudes from the opening, and the rotary shaft of the rotary grinding body is arranged on the upper part of the vertical casing to a cutter motor and gears or the like. And a dust collecting hose connected to a separately arranged dust collector is connected to the suction port provided on the side of the frame of the vertical housing.
The dust collecting hose is guided by an operation handle which is detachably provided on the side surface of the housing.

Further, the vertical housing is provided with a folding handle and a fixed handle on the side of the frame.

[0008]

As described above, the rotary grinding body in which a plurality of spindles for arranging the cutter blades are arranged around the opposing flywheels is provided in the lower portion of the vertical casing, and a part of the cutter blades is provided. The bearing is arranged so that it protrudes from the opening, and this rotary shaft is linked to the cutter motor arranged on the upper part of the vertical housing with a gear transmission mechanism and is collected in the suction port of the vertical housing. Since a dust hose is connected and the whole body (machine) has a vertically long compact structure, the grip part of the stick-shaped operation handle protruding from the lower part of the vertical housing is held, and the vertical housing is a latance layer generated on the concrete surface. Place it on the top surface of. In this case, since the main body has a narrow width structure in which the rotary grinding body and the motor are installed in a vertical casing that has two upper and lower stages, the main body can be easily placed on the concrete surface between the narrow reinforcing bars and has a predetermined length. Since the operator's handle (stick) is held, it is possible to work in a standing posture. Here, if the cutter motor and a dust collector separately arranged are driven, the laitance on the concrete surface is scraped by the cutting operation of the cutter blade of the flywheel that rotates in high speed in contact with the concrete surface. Moreover, the concrete dust scattered here is forcibly sucked to the dust collector side by the suction action of the dust collection hose facing the suction port of the vertical casing that houses the cutter blade group (rotary grinding body), and the outside of the casing Does not drift dust.

Further, in particular, when the working place is a fine and narrow place such as a corner of a deep foundation, a grinder provided with a detachable rod-shaped operation handle is used, and the operation handle is removed to provide a vertical housing. It is also possible to raise the foldable handle on the side of the machine and squeeze the fixed handle on the rear side to perform the grinding work only with the main body of the grinder. Of course, even here, the scraped dust is sucked up by the dust collecting hose side.

[0010]

The present invention will be described below with reference to the drawings of the embodiments.

1 to 6 show an embodiment of a concrete grinder with a dust collector in which a part of the dust collecting hose is used as an operating handle,
Reference numeral 1 denotes a narrow vertical casing having an opening 2 at its lower end, and bearings 5 are provided at both ends of a rotary shaft 4 which axially supports disk-shaped flywheels 3 facing each other at predetermined intervals inside the vertical casing 1. A cutter blade formed by embedding a high-hardness titanium tip 8 in a star-shaped protrusion 7a in a plurality of support holes 6 formed at predetermined intervals in the peripheral portions of the opposing flywheels 3, 3 while A rotary grinding body 10 is constructed as a whole by inserting and attaching both ends of a support shaft 9 through which a plurality of 7 are stacked. The transmission gear 13 attached to the end of the rotary shaft 4 projecting outside the frame of the vertical casing 1 of the rotary grinding body 10 includes the vertical casing 1
Rotary shaft 11 of a cutter motor 11 vertically arranged on the upper part of the
The bevel gear 12 provided in a, the integral gear 13 ′ via the bevel gear 12 ′ meshing with the bevel gear 12, and the intermediate gear 13 ″ are sequentially meshed to form a transmission mechanism 14. Further, the vertical casing 1 has In the suction port 15 provided on the side of the frame that houses the rotary grinding body 10,
Dust collecting hose 17 which is a flexible hose of a predetermined length and is connected to a dust collector 16 which is a separately disposed industrial vacuum cleaner
The vertical casing 1 which is a part of the structure is communicated with a pipe-shaped operation handle 18 that projects at a predetermined angle, and the whole structure constitutes a concrete grinder 19 with a dust collector. Reference numeral 20 is a coupler interposed between the end of the pipe-shaped operation handle 18 and the dust collecting hose 17.

By the way, the size of the vertical housing is 85 mm in width,
It has a rectangular shape with a depth of 132 mm and a height of 180 mm, and a motor with a length (height) of 138 mm is integrally arranged on the upper part of the vertical housing.

Next, this operation will be explained. For example, a leitance (not shown) generated on the concrete surface of the deep foundation of a steel tower
In the grinding work of No. 1, first, the pipe-shaped operation handle 18 projecting from the vertical casing 1 serving as the grinder main body of the concrete grinder 19 with a dust collector is grasped and placed on a predetermined concrete surface,
If the motor 11 above the vertical casing 1 and the dust collector 16 separately arranged are driven, the rotary grinding body 1 of the vertical casing 1 is driven.
0 indicates that high-speed rotation on the motor 11 side is transmitted through a predetermined gear type transmission mechanism 14, and the frame 1a of the vertical housing 1 has a suction port 1
Negative pressure is created by the suction action generated in 5.

In this state, by rotating a group of cutter blades 7 of a plurality of (six in the figure) spindles 9 located on the peripheral edge of the rotary grinding body 10, the star-shaped projections 7a of the cutter blades 7 are rotated. The tip of the titanium chip 8 embedded in the concrete surface A is pressed against the concrete surface A in combination with the body weight of the vertical housing 1 and the motor 11 and the pressing of the operation handle 18, which moves with a light operation and has a high hardness on the concrete surface. It is cut with the titanium chip 8 of.

In this case, a gap h between the concrete dust scraped by the cutter blade 7 and the cutter blade 7 protruding from the concrete surface A and the opening 2 of the vertical casing 1 by a predetermined width.
However, since the negative pressure is generated in the vertical housing 1 by the suction force generated in the dust collector 16, the vertical casing 1 is forcibly sucked from the suction port 15 and the pipe-shaped operation handle 18 and the dust collection member. The dust is collected in the dust collecting pot portion 16a of the dust collector 16 through the hose 17 and does not cause scattering to the outside of the vertical housing 1.

Further, at this time, since the vertical casing 1 has a narrow casing shape, the vertical casing 1 can be easily inserted between the reinforcing bars (not shown) which are planted at a narrow interval like a deep foundation of a steel tower. Gained and vertical housing 1
Since it has a handle, you can grind while standing.

7 and 8 show another embodiment in which the operating handle is detachably attached to the vertical casing. In this case, the vertical housing 1 has a shape in which a U-shaped support handle support piece 21 for projecting a protrusion is provided on the upper rear frame side portion 1b of the suction port 15 provided in the housing 1. The lower end of the rod-shaped operating handle 22 having the grip portion 22a at its tip is inserted in between, and the connecting shaft 23 is laterally penetrated and attached thereto. Further, a dust collecting hose 17 led from a dust collector 16 is directly connected to a coupler portion 20 ′ protruding from the end of the suction port 15 of the housing 1. Reference numeral 24 is a detachable tightening band that allows a part of the dust collecting hose 17 to be along the rod-shaped operation handle 22. Reference numeral 25 is a foldable handle provided with a known folding mechanism (not shown) disposed on the lateral frame side portion 1c of the housing 1, and 26 is a circular protrusion provided on the rear frame side portion 1b of the housing 1. It is a fixed handle of the mold.

In the embodiment of this embodiment, the vertical casing 1 is used for the grinding work in a place where a grinding space is provided to some extent as described above.
The rod-shaped operation handle 22 protruding from the rear end is left as it is, and the grip portion 22a is gripped to press the cutter blade 7 projecting from the lower end of the vertical housing 1 against the concrete surface A for grinding work. Dust generated by this grinding operation is also collected from the suction port 15 through the dust collecting hose 17 to the dust collector 16 separately arranged. At this time, the folding handle 25 is still folded and stored on the side of the vertical housing 1.

Further, when the concrete surface A of a narrow end portion such as a corner of a deep foundation is ground, the rod-shaped operating handle 22 is inevitable.
Is a hindrance, the rod-shaped operation handle 22 protruding at the rear end of the vertical housing 1 is removed after removing the connecting shaft 23 serving as the pivot of the lower end from the support receiving piece 21, and the vertical housing 1 The foldable handle 25, which is pre-folded on the side of the
The inside of a is rotated to stand up (laterally project) (see FIG. 8). However, the dust collecting hose 17 along the rod-shaped operation handle 22 is detached by unfastening the tightening band 24, and only the dust collecting hose 17 is pulled out from the rear end of the vertical housing 1.

In this state, the handle 25 and the fixed handle 26 are
The vertical casing 1 serving as the main body of the vertical body is lifted and the cutter blade 7 protruding from the opening 3 of the vertical casing 1 is pressed against the concrete surface A for grinding. The dust at this time is also
A dust collecting hose 17 facing the suction port 15 is provided at the rear of the vertical housing 1.
Since it is connected, the dust collector 16 is forcibly sucked and collected.

[0021]

As described above, the concrete grinding machine with a dust collector of the present invention accommodates the rotary grinding body in which a part of the cutter blade is exposed from the lower end opening in the vertical casing having the cutter motor arranged on the upper part thereof. In addition, a dust collection hose connected to the dust collector is connected to the suction port provided in the vertical housing via a pipe-shaped operation handle that is projecting on the housing, or the dust collection hose is directly connected to the suction port, A part of the dust hose is detachably guided to the vertical housing with a protruding rod-shaped operation handle, so when performing grinding work on the laitance of a concrete surface, you can hold the operation handle and operate it easily while standing. Can be ground with a cutter blade. In this case, since the vertical casing and the motor for driving the rotary grinding body are arranged in two stages, upper and lower, and the total load is applied to the cutter blade, it is possible to perform light grinding in combination with pressing of the rod-shaped operating handle, and The concrete surface can be easily moved. Further, the entire machine body has a vertically elongated and narrow width grinding machine in which the motor section and the rotary grinding body section are vertically arranged in two stages, and can be easily inserted even between narrow reinforcing bars.
Of course, since the grinder has a compact structure, it can also be used for ordinary processing surfaces such as concrete wall surfaces and ceiling surfaces.

Moreover, the present invention forcibly removes the grinding dust, which is the most problematic problem in concrete grinding, by the suction action of the dust collecting hose of the dust collector facing the suction port of the vertical housing, so that the surroundings are not polluted. Needless to say, there is no risk that workers will inhale dust. This allows the user to work without wearing a dust mask or the like, which in turn leads to improved work efficiency.

For work in narrow places such as corners, a detachable type handle is used. If necessary, the handle is detached from the vertical casing and the folded handle is grasped. Grinding work can be done easily by pressing. Here again, a dust collecting hose is connected to the vertical housing, which has the effect of forcibly removing dust.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a concrete grinder with a dust collector showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the vertical casing.

FIG. 3 is a side view showing a transmission mechanism arranged on a side portion of the vertical casing.

FIG. 4 is an explanatory view in which a dust collecting hose is interposed in a vertical housing and a dust collector is connected.

FIG. 5 is a perspective view of the vertical housing as viewed from below.

FIG. 6 is a front view of a single cutter blade.

FIG. 7 is a perspective view of a main part of another embodiment in which an operation handle attached to a vertical housing is detachable.

FIG. 8 is an explanatory diagram in which an operation handle is removed from the vertical casing and a folding handle is raised.

FIG. 9 is an explanatory view of a conventional concrete grinding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical housing 2 Opening 3 Freywheel 4 Rotating shaft 7 Cutter blade 8 Titanium tip 9 Spindle 10 Rotating grinding body 11 Cutter motor 14 Transmission mechanism 15 Suction port 16 Dust collector 17 Dust collecting hose 18 Pipe-shaped operation handle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masako Satomi 5-6-38-1104 Yashio, Shinagawa-ku, Tokyo (72) Inventor Kazuo Shinno 1 of 2-249 Makinohara, Matsudo City, Chiba Prefecture

Claims (3)

[Claims] 1. A vertical shaft having a lower end opened, and a supporting shaft for arranging a plurality of cutter blades each having a titanium tip or the like embedded in a tip thereof is provided around a peripheral edge of an opposing flywheel at predetermined intervals. The formed rotary grinding body is arranged so that a part of the cutter blade facing the bottom protrudes from the opening, and the rotary shaft of the rotary grinding body is arranged on the upper part of the vertical casing to a cutter motor and gears or the like. A part of the dust collecting hose connected to the suction port provided on the frame side portion of the vertical housing and connected to a separately arranged dust collector is projected on the housing. A concrete grinder with a dust collector, which is a pipe-shaped operation handle. 2. A vertical shaft having a lower end opened, and a spindle for arranging a plurality of cutter blades each having a titanium tip or the like embedded in the tip thereof is provided around a peripheral edge of an opposing flywheel at predetermined intervals. The formed rotary grinding body is arranged so that a part of the cutter blade facing the bottom protrudes from the opening, and the rotary shaft of the rotary grinding body is arranged on the upper part of the vertical casing to a cutter motor and gears or the like. And a dust collecting hose connected to a separately arranged dust collector is connected to the suction port provided on the frame side portion of the vertical housing, and the dust collecting hose is connected to the side surface of the housing. A concrete grinder with a dust collector, which is guided by an operation handle that is detachably mounted on the floor. 3. The concrete grinder with a dust collector according to claim 2, wherein the vertical casing is provided with a folding handle and a fixed handle on the side of the frame.