JP3090879B2 - Surface shaving equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the case of roughening (pitting) a surface of a concrete structure, a surface of a stone material, or the like, or peeling off rust or a coating film on a bridge, or a substance attached to construction equipment. The present invention relates to a surface scraping device used in such a case.

[0002]

2. Description of the Related Art This type of apparatus is a hand-type apparatus having a head provided with a plurality of nozzles at the tip of a handle, the head being rotated by an air motor provided in the handle, and a water jet or an air jet from the nozzle. It is designed to eject a breakable jet.

[0003]

When roughening a surface to be treated, for example, a surface of a concrete structure, is performed by the above-mentioned conventional apparatus, a head having a handle and a left and right distance from the surface to be treated are maintained. Or, it is processed by moving it up and down, but during the work, there is a problem in the hygiene of workers because the dust of the concrete that has been removed is scattered, and it was a very severe work . Therefore, by mechanically linearly reciprocating the head, the distance between the surface to be processed and the nozzles becomes constant over the entire surface of the surface to be processed, and the processing is performed with a constant balance, and the above-mentioned problem is temporarily solved. However, in order to reciprocate the head, the head is temporarily stopped and then returned again at the folded portion, and the jetting is continued during that time, so that the surface corresponding to the folded portion is another surface. There is also a fear that the head may be scraped more than twice or three times to cause breakage, and therefore, there is a problem that a satisfactory finish cannot be obtained only by simply mechanically driving the head.

It is an object of the present invention to provide a surface exfoliating apparatus which can mechanize the above and can exfoliate the surface to be processed uniformly over the entire surface.

[0005]

A means for solving the above-mentioned object is to provide a head provided with a nozzle for jetting a water jet or an abrasive jet on a frame so as to be able to reciprocate linearly, and to reciprocate both reciprocating nozzles in the frame. The part is provided with a blocking part for blocking the injection of the nozzle.

[0006] In addition to the above solution, the head is installed on the head.
The nozzle revolves to the left around the rotation axis
Of the trajectory of the jet that jets while moving linearly to the right,
It is desirable to provide a mask for blocking the upper and lower overlapping portions of the jet .

[0007]

As described above, since the blocking portions are provided at both ends, even if the jetting is performed at the folded portion of the head, the jetting force is blocked by the blocking portion and the shaving on the surface to be processed is not performed. Since the cutting is performed between the two shut-off portions as the nozzle travels, the processing is performed in a uniform state over the entire surface.

Further, if a mask is provided, the overlapping portion in the trajectory of the jet flow is shielded by the mask, so that the processing width for the mask becomes narrower, but a uniform finish over the entire surface is more reliably achieved. Will be obtained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described by way of an embodiment. A head provided to revolve nozzles on a frame is provided so as to be able to run along the longitudinal direction of the frame, and a forward / reverse motor provided on the frame is provided. The head is rotated so that the head is reciprocated linearly between both ends of the frame by running means having a structure in which the head is fastened to an endless chain arranged in the longitudinal direction of the frame. In the part where the head turns back,
This is provided with a blocking portion that is blocked by a plate so that the jet from the nozzle does not reach the surface to be processed.

As another embodiment, in addition to the above-described configurations,
The head or frame is provided with a mask that blocks a part of the injection from the nozzle.When the nozzle moves in the horizontal direction while revolving, the upper and lower parts of the trajectory of the jet are the same as the preceding trajectory. Because the following trajectory overlaps,
By covering the overlapped portion of the trajectory with a mask, excessive scraping is prevented.

Although the plate forming the blocking portion is fixedly provided, the plate may be provided so as to be openable and closable.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment will be described in detail with reference to the drawings. As shown in FIG. 1, a frame 1 has a pair of upper and lower bars 3, 3 installed in parallel between two side plates 2, 2. A pair of upper and lower guide rails 4 and 4 are also erected in the middle of both side plates 2 and 2 in parallel with the bar 3, and the head 5 is slidable over the upper and lower guide rails 4 and 4. The head 5 is provided with four upper and lower rollers 6 which are in contact with the inner surfaces of the upper and lower bars 3, 3, and the head 5 is linearly reciprocated by running means 7 provided on the frame 1.

Four arms 9 are radially protruded from a rotating shaft 8 protruding from the front surface of the head 5. Nozzles 10 are provided at the tips of the arms 9, and the nozzles 10 pass through the arms 9 from the rotating shaft 8. Each of the nozzles 10 revolves by injecting a water jet or an abrasive jet (containing abrasive) toward the front and rotating the rotating shaft 8 by an air motor (not shown) provided in the head 5. This structure is almost the same as that of the conventional hand type, and has a cover 11 on the outer periphery of the tip of the head 5.

The traveling means 7 is provided with a forward / reversely rotatable motor 12 on a back surface at one end of the frame 1 so that a main driving shaft 13 rotated by the motor 12 is inserted into the frame 1 so as to be orthogonal to the guide rail 3 in a plane. , A driven shaft 14 parallel to the main driving shaft 13 is mounted on the end of the frame 1 on the opposite side to the above, and sprockets 15 and 16 are fitted to the two shafts 13 and 14 respectively. The head 5 reciprocates linearly along the guide rail 3 by driving each end of the chain 17 to the head 5 to form an endless chain by sequentially switching the motor 12 between forward and reverse. . In order to switch between the forward and reverse rotations of the motor 12, the state in which the head 5 reaches the end of the frame 1 is detected by a sensor (not shown) and switched.

Further, at both ends of the frame 1, that is, at the folded portion of the head 5, a blocking portion 18 for blocking the jet flow from the nozzle 10.
The blocking portion 18 is formed by projecting a plate body 19 from the side plate 2.

The plate body 19 forming the above-mentioned blocking portion 18 is fixedly protruding from the side plate 2, but is not fixed but may be provided so that the blocking portion 18 can be opened and closed. The plate body 19 is divided into upper and lower parts, and as shown in FIG. 2, each divided plate body 19a, 19b is opened and closed by a cylinder (not shown) in the vertical direction, or both are rotated in opposite directions, as shown in FIG. To open and close in a V-shape,
Alternatively, as shown in FIG. 4, there is a means for opening and closing by displacing from a vertical state to a horizontal state.

The mechanism for opening and closing in a V-shape may be formed by a conventionally known means. For example, each of the divided plates 19a,
An intermediate portion of a supporting rod projecting from the extension 19b is rotatably supported on a side plate, and both supporting rods are kept closed by a cam forcibly rotating, and a compression interposed between both divided plate bodies. The spring is opened by the repulsive force of the spring.

In the case of the means for displacing and opening the horizontal state, the intermediate portion of the support rod extending and projecting from each of the divided plates 19a and 19b is bent so as to be parallel to the side plate 2 of the frame 1. Then, the bending portion is pivotally attached to the side plate 2 and the cylinder connected to the upper and lower bending portions is used to displace the horizontal bending portion (closed state) to a vertical or nearly vertical state (open state). It may be opened and closed by a pinion provided on a pivot shaft of the bending portion and a rack reciprocating by a cylinder.

Next, as shown in FIG. 5, the jet 10 overlaps the upper and lower parts of the trajectory as the nozzle 10 rotates and travels toward one side, as shown in FIG. The mask 20 may be provided in the opening of the cover 11 provided in the head 5 as shown in FIGS. 6 and 7, or may be provided in the frame 1 as shown in FIG.

When provided on the cover 11, the cover 11
The mask 20 formed of a band-shaped plate is fixed vertically to the opening edge of the opening, or provided on the upper and lower portions.

Further, in order to mount it on the frame 1, a band-shaped plate may be provided in the upper and lower portions between the side plates 2 and 2 in the same manner.

[0022]

According to the surface exfoliating apparatus of the present invention, when the nozzle for jetting the water jet or the abrasive jet reciprocates linearly while rotating, the feed is once continued while the jetting is continued at both of the folded portions. Stops, but the jet flow to the surface to be processed is blocked by the blocking part, so that the surface to be processed in the part facing the folded part of the nozzle is not shaved, and by moving it, the unprocessed surface is processed in the same state become able to.

When the nozzle is rotated and traveled, the upper and lower portions of the trajectory of the jet flow overlap and are deeply cut. However, a device provided with a mask eliminates the drawback of deep cutting. The entire surface to be processed can be processed in a uniform state.

[Brief description of the drawings]

FIG. 1 is a plan view showing a surface scraping apparatus according to the present invention.

FIGS. 2A and 2B are front views showing a state in which a blocking unit is opened and closed vertically.

FIGS. 3A and 3B are front views showing a state in which a blocking unit is opened and closed in a V-shape.

FIGS. 4A and 4B are a front view and a side view showing a state in which the blocking unit is opened and closed by rotating the blocking unit in the vertical direction.

FIG. 5 is an explanatory diagram showing an ejection trajectory of a nozzle.

FIG. 6 is a front view of a main part showing a mask provided on a head.

FIG. 7 is a front view of a main part showing a mask of another example.

FIG. 8 is a front view showing an example in which a mask is provided on a frame.

[Explanation of symbols]

 1 frame 2 side plate 5 head 7 running means8 Rotation axis  DESCRIPTION OF SYMBOLS 10 Nozzle 11 Cover 18 Blocking part 19 Plate body 20 Mask

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideo Nagase 2410 Motoe, Uozu City, Toyama Prefecture Inside Sugino Machine Co., Ltd. (56) References JP-A-6-226215 (JP, A) JP-A-2-303800 ( JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05B 3/18 B05B 13/04 B05B 15/04 B28D 1/00

Claims (2)

(57) [Claims] 1. A head (5) provided with a nozzle (10) for jetting a water jet or an abrasive jet on a frame (1) is provided so as to be able to reciprocate linearly, and the nozzle (10) reciprocates in the frame (1). A surface scraping apparatus characterized in that a cut-off portion (18) for blocking the injection of the nozzle (10) is provided in each of the folded portions. 2. A rotation installed on the head (5).
The nozzle (10) revolves left around the axis (8)
Of the trajectory of the jet that jets while moving linearly to the right,
A mask (20) that shields the upper and lower overlapping portions of the jet
Surface abrasion apparatus according to claim 1, characterized in that is provided.