Surface Treatment Equipment

Abstract

A surface treatment device is provided that can simultaneously treat two surfaces of a structure, such as a ground cover, having a rising surface and a horizontal surface. [Solution] The surface treatment device 1 includes a first water jet nozzle 2a for treating the horizontal surface of a structure, and a second water jet nozzle 2b for treating the rising surface of the structure. The first casing part 3a is provided along the horizontal surface with the first water jet nozzle 2a rotatably attached thereto. The second casing part 3b is provided along the rising surface with the second water jet nozzle 2b rotatably attached thereto. One side of the first casing part 3a is attached to the upper part of the second casing part 3b.

Description

[Technical field]

[0001] The present invention is an apparatus for treating a surface, such as a road cover. [Background technology]

[0002] A ground cover is a part of the side edge of a bridge that is higher than the bridge surface, and it can be the base for a parapet (also called a guardrail or a fence) or it can function as a rainwater gutter. An example of the location of a ground cover in a bridge structure is described in Non-Patent Document 1.

[0003] In bridge repair work, it is necessary to restore the waterproof performance of the covering parts, so after treating the surface of the covering parts, waterproofing must be applied.

[0004] Conventionally, to treat the surface of a ground cover part, a hand-held type surface treatment device using a water jet has been used, such as the devices described in Non-Patent Document 1 and Non-Patent Document 2. That is, an operator treats the surface of the ground cover by applying such a hand-held surface treatment device to the ground cover part.

[0005] The ground cover is higher than the bridge surface, so it has two surfaces: a vertical surface that rises above the bridge surface and a horizontal surface. Therefore, workers were using hand-type surface treatment equipment to remove the waterproof layer on the surface, both of which were on the vertical and horizontal surfaces. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2022-62481 [Patent Document 2] Publication number 04-23936 [Patent Document 3] Patent Publication No. 05-10480, Figure 2, column 6, lines 14 to 16 [Patent Document 4] Patent No. 2856473, Figures 1, 12, 13, 14, page 7, left column, lines 18 to 46 [Patent Document 5] Patent No. 5892965 [Non-patent literature]

[0007] [Non-Patent Document 1] Kamino Blog Civil Servant × Civil Engineering, "Names of each part of a bridge", [online], Searched on September 19, 2023, Internet,<URL:https: / / kamino.blog / bridge3 / > [Non-Patent Document 2] Sugino Machine Co., Ltd., “Water jet (WJ) cleaning and peeling unit for walls “Aqua Cellrotor””, [online], searched on September 19, 2023, Internet, <URL:https: / / www.sugino.com / site / cleaning-peeling-blasting-cutting-equipment / wj-aj-nozzle-type-asr.html> [Non-Patent Document 3] Amano Kiko Co., Ltd., “Hand Aquablast”, [online], searched on September 19, 2023, Internet,<URL:http: / / amanokiko.co.jp / system / config2.html> Summary of the Invention [Problem to be solved by the invention]

[0008] As described above, the ground cover has two sides, but when using a conventional hand-type surface treatment device, only one side can be treated at a time. Also, since the work was done by hand, the pressure and flow rate of the ultra-high pressure water had to be limited. As a result, the work took a long time. Also, when working on corners, a gap would occur between the cover of the hand-type surface treatment device and the ground cover, which required a lot of effort to prevent splashing.

[0009] The same problem occurs not only in ground coverings, but also in the case of surface treatment of structures having two surfaces, an upright surface and a horizontal surface.

[0010] Patent Document 1 describes a surface treatment device using a water jet nozzle. By using the surface treatment device described in Patent Document 1, one surface can be efficiently treated. However, this surface treatment device cannot efficiently treat the surface of a structure having two surfaces, such as a ground cover. The water jet nozzle and its rotation structure described in Patent Document 1 can be used in the present invention.

[0011] Patent Document 2 describes a gutter cleaning device that has a high-pressure water discharge pipe with many nozzles inside a box with an open bottom. The device described in Patent Document 2 also cleans only one side, and cannot efficiently treat the surface of a structure with two sides, such as a ground cover.

[0012] Patent Document 3 describes a gutter cleaning nozzle (23) that sprays high-pressure water while swinging to clean the inner wall surface (13a) of a tunnel (13). However, the gutter cleaning nozzle (23) described in Patent Document 3 cannot be used for surface treatment of structures such as ground guardrails that have raised surfaces and horizontal surfaces.

[0013] The abrasive cleaning head (5) of Patent Document 4 is a device for cleaning the rising portion of a parapet (9) from a ground guard (10), as shown in Fig. 1 and Fig. 12 to Fig. 14. The multiple abrasive cleaning nozzles (19) in the abrasive cleaning head (5) are simply arranged so that they can spray high-pressure water toward the rising portion, and are only used for cleaning the rising portion at the bottom of the parapet. Therefore, the abrasive cleaning head (5) described in Patent Document 4 cannot be used for surface treatment of a structure having two sides, such as a ground guard.

[0014] The surface treatment device described in Patent Document 5, like Patent Document 1, is a device for performing surface treatment on one surface, and cannot be used for surface treatment of structures having two surfaces, such as ground coverings.

[0015] Therefore, an object of the present invention is to provide a surface treatment device capable of simultaneously treating two surfaces of a structure (such as a ground cover) having a raised surface and a horizontal surface. [Means for solving the problem]

[0016] In order to solve the above problems, the present invention has the following configuration. The present invention is directed to a surface of a structure having two surfaces, a horizontal surface and a rising surface. chop A surface treatment device for A first water jet nozzle having a plurality of jet nozzles arranged in a row to jet high-pressure water for chipping the surface of a horizontal plane; A second water jet nozzle having a plurality of jet nozzles arranged in a row to jet high-pressure water for chipping the raised surface; a first casing portion provided along a horizontal plane and having a first rotating means attached thereto for rotating the entire first water jet nozzle about a first axis perpendicular to the horizontal plane; a second casing portion provided along the raised surface and having a second rotating means attached thereto for rotating the entire second water jet nozzle about a second axis perpendicular to the raised surface; a first suction port provided in the first casing portion; a second suction port provided in the second casing portion; a first high-pressure water supply port provided in the first rotating means for supplying high-pressure water; a second high-pressure water supply port provided in the second rotating means for supplying high-pressure water; Equipped with. The high pressure water has a pressure capable of turning the surface of a structure into gravel. High pressure water is supplied to the first high pressure water supply port and the second high pressure water supply port from the outside. High-pressure water is supplied from a first high-pressure water supply port to a first water jet nozzle. High-pressure water is supplied to the second water jet nozzle from the second high-pressure water supply port. The entire first water jet nozzle is rotated about a first axis by the first rotation means, and the entire second water jet nozzle is rotated about a second axis by the second rotation means, so that the surface of the structure is chipped as the high-pressure water sprayed from each spray nozzle traces a circular trajectory. High-pressure water and gravel are sucked in from the first suction port and the second suction port.

[0017] Preferably , No. It is preferable that one side surface of the first casing part is attached to the upper part of the second casing part.

[0018] Preferably, the first casing portion is vertically adjustable in height relative to the second casing portion.

[0019] Preferably, the second casing part has a sliding part at the top, the sliding part having grooves at the top and bottom for adjusting the height, and the first casing part is attached to the grooves of the sliding part, making the height adjustable.

[0020] Preferably, the first casing part has a shape surrounding the first water jet nozzle, and the second casing portion has a shape surrounding the second water jet nozzle. It is good.

[0021] Preferably, the surface treatment apparatus further comprises a dolly for mounting the first casing part and the second casing part.

[0022] Preferably, the carriage includes a first casing portion for mounting the first casing portion. 1 It is preferable that the first frame body is capable of being adjusted in height up and down relative to the second frame body.

[0023] The surface treatment device may further include a brush arranged to surround at least a portion of the periphery of the first casing part and / or the second casing part.

[0024] The present invention also provides a method for forming a surface of a structure having two surfaces, a horizontal surface and a rising surface. chop A surface treatment method for The above-described surface treatment device A first water jet nozzle is used to treat a horizontal surface while The surface treatment device described above A second water jet nozzle is used to polish the surface of the raised face. chop It is characterized by:

[0025] Preferably, The above-described surface treatment device The first casing part and the second casing part On a trolley With the device attached, the horizontal and rising surfaces of the structure are simultaneously measured while moving the dolly on the structure. chop It is good. Effect of the Invention

[0026] According to the present invention, the horizontal surface of the structure is treated by the first water jet, and the rising surface of the structure is treated by the second water jet, so that two surfaces of the structure can be treated simultaneously, and the surface treatment of the structure can be performed efficiently.

[0027] By attaching one side of the first casing part to the upper part of the second casing part, the first water jet nozzle and the second water jet nozzle are arranged in an inverted L shape, so that two sides of a structure can be treated simultaneously.

[0028] The height of the raised parts of structures varies depending on the construction site, but by making the first casing part height adjustable, it is possible to treat two sides simultaneously even if the heights of the raised parts of the structures are different.

[0029] The height of the first casing part can be adjusted with a simple structure of a slide part having a groove.

[0030] The first and second casing parts are shaped to surround the first and second water jet nozzles, respectively, and a suction port is provided, so that the high-pressure water and gravel after surface treatment can be sucked in from an external suction device, thereby preventing the high-pressure water and gravel from scattering around the site.

[0031] By mounting the first and second casing parts on a carriage, it becomes possible to process two sides simultaneously while moving the carriage.

[0032] By constructing the cart from a first frame body and a second frame body and making the height of the first frame body adjustable relative to the second frame body, even if the heights of the raised surfaces of the structure differ, the height of the first water jet nozzle can be adjusted to simultaneously process two surfaces.

[0033] By providing a brush, it is possible to prevent high-pressure water and gravel from scattering into the surrounding area.

[0034] These and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0035] [Figure 1] Fig. 1 is a diagram for explaining the structure of a surface treatment device 1 according to one embodiment of the present invention. Fig. 1 shows how a first water jet nozzle 2a for a horizontal portion and a second water jet nozzle 2b for a rising portion are arranged with respect to a cross section of a ground cover 10. [Diagram 2] Fig. 2 is a diagram for explaining the structure of a surface treatment device 1 according to an embodiment of the present invention. Fig. 2 shows a state in which the first water jet nozzle 2a has slid upward with respect to the second water jet nozzle 2b from the state shown in Fig. 1. [Diagram 3] FIG. 3 is a front view of the surface treatment apparatus 1 according to the embodiment of the present invention, with the second water jet nozzle 2b facing forward. [Figure 4] FIG. 4 is a plan view of the surface treatment device 1 according to the embodiment of the present invention, with the first water jet nozzle 2a facing upward. [Diagram 5] FIG. 5 is a perspective view of a surface treatment apparatus 1 according to an embodiment of the present invention. [Figure 6] FIG. 6 is a diagram for explaining the internal structure of the first casing portion 3a and the second casing portion 3b. [Figure 7] FIG. 7 is a photograph, substituted for a drawing, showing the state during construction when the surface of a ground cover is being treated using the embodiment of the surface treatment device 1. [Figure 8] FIG. 8 is a photograph, substituted for a drawing, showing the surface of the ground cover after the surface of the ground cover has been treated using the embodiment of the surface treatment device 1. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] With reference to FIG. 1, a schematic structure of a surface treatment apparatus 1 according to one embodiment of the present invention will be described. The surface treatment device 1 is equipped with a first water jet nozzle 2a for the horizontal portion for treating the surface of the horizontal portion of the ground covering portion 10, and a second water jet nozzle 2b for the rising portion for treating the surface of the rising portion of the ground covering portion 10.

[0037] The first water jet nozzle 2a is rotatably housed within a first casing portion 3a that is open on one side. The second water jet nozzle 2b is rotatably housed in a second casing portion 3b that is open on one side. The first casing portion 3a is attached to the second casing portion 3b via a slide portion 4 so as to be vertically movable by a width D.

[0038] A rotary joint 5a is attached to the first casing 3a. The rotary joint 5a is a device for connecting a pipe for high-pressure water (not shown) and a rotating part (here, the first water jet nozzle 2a). The rotary joint 5a may be a device called a rotary joint or a swivel joint. In other words, the rotary joint 5a is a joint that can pass high-pressure water through the first water jet nozzle 2a and rotate the first water jet nozzle 2a. The rotary joint 5a is attached to the first casing 3a.

[0039] High-pressure water is supplied from a high-pressure water supply port 6a (see FIGS. 3 and 4) provided in the rotary joint 5a. A first water jet nozzle 2a is attached to a rotary shaft 7a provided in the rotary joint 5a.

[0040] An air motor 8a is attached to the first casing portion 3a. The air motor 8a is a motor that rotates by air supplied from the outside. Note that, other than the air motor 8a, other rotary drive devices such as electric or hydraulic types may be used.

[0041] The rotating shaft (not shown) of the air motor 8a and the rotating shaft 7a of the rotary joint 5a are connected by a transmission means such as a pulley, a belt, etc. When the rotating shaft (not shown) of the air motor 8a rotates, the rotating shaft 7a rotates, and the first water jet nozzle 2a rotates.

[0042] The first water jet nozzle 2a has a water passage therein. A plurality of jet nozzles 9a are attached to the water passage. The number and attachment angle of the jet nozzles 9a are not limited in the present invention. Here, the first water jet nozzle 2a is described as being of a straight line type, but it may be of a cross type or a triangular type extending in three directions from the center, and any type of water jet nozzle may be used. The jet nozzles 9a are not limited to being arranged in a line, and may be arranged in a zigzag pattern. The arrangement of the jet nozzles 9a is not limited in the present invention.

[0043] When high-pressure water is supplied from the high-pressure water supply port 6a, the high-pressure water is jetted from each jet nozzle 9a through a water passage inside the rotary joint 5a and the water passage inside the first water jet nozzle 2a. In addition, by driving the air motor 8a to rotate the rotary shaft 7a, the first water jet nozzle 2a rotates and high-pressure water is sprayed from each spray nozzle 9a. This processes the horizontal surface of the ground cover 10. Note that surface processing is sometimes called "chipping."

[0044] The second water jet nozzle 2b has the same structure as the first water jet nozzle 2a. That is, a rotary joint 5b is attached to the second casing part 3b. The rotary joint 5b has a high-pressure water supply port 6b (see Figs. 3 and 4). The second water jet nozzle 2b is attached to a rotating shaft 7b of the rotary joint 5b. An air motor 8b is attached to the second casing part 3b. The rotating shaft (not shown) of the air motor 8b is connected to the rotating shaft 7b by a transmission means. The second water jet nozzle 2b rotates in accordance with the driving of the air motor 8b, and the second water jet nozzle 2b rotates while high-pressure water supplied from the high-pressure water supply port 6b is sprayed from the spray nozzle 9b. In this way, the surface of the rising part of the ground cover 10 is treated.

[0045] As will be described later, the first casing portion 3a and the second casing portion 3b are provided with suction ports, and the high-pressure water used in chipping and gravel generated by the chipping are sucked in from the suction ports.

[0046] Furthermore, brushes 11a are attached to the three outer sides of the first casing part 3a other than the side connected to the second casing part 3b. The brushes 11a prevent high-pressure water and / or gravel from scattering from the first casing part 3a.

[0047] Similarly, brushes 11b are attached to the three outer sides of the second casing part 3b other than the side connected to the first casing part 3a. The brushes 11b prevent high-pressure water and / or gravel from scattering from the second casing part 3b.

[0048] With reference to Figs. 2 and 3, the vertical height adjustment of the first casing portion 3a relative to the second casing portion 3b will be described. As shown in FIG. 2, the first casing portion 3a and the second casing portion 3b are connected via a slide portion 4.

[0049] The slide part 4 is attached to the second casing part 3b. The slide part 4 has a plurality of grooves 4a as shown in Fig. 3. The first casing part 3a is attached to the slide part 4 by a plurality of fastening means 4b. The height of the first casing part 3a relative to the second casing part 3b can be adjusted by loosening the fastening means 4b and adjusting the position of the fastening means 4b in the grooves 4a.

[0050] The height of the rising portion of the ground covering 10 varies. Therefore, by making the first casing part 3a for the first water jet nozzle 2a used to chip the horizontal portion adjustable in height, it becomes possible to chip both the horizontal portion and the rising portion at the same time even if the heights of the rising portions of the ground covering 10 vary.

[0051] As can be seen by comparing Figures 1 and 2, when the first casing part 3a is lowered, the upper part of the second water jet nozzle 2b injects high-pressure water into a part of the first casing part 3a (see the part surrounded by "K" in Figure 1). Since the first casing part 3a is typically made of metal, the first casing part 3a will not be damaged even if the high-pressure water is injected. In addition, this structure prevents the high-pressure water from the second water jet nozzle 2b from directly entering the first casing part 3a, so there is no adverse effect on the surface treatment work by the first water jet nozzle 2a.

[0052] It is necessary to move the surface treatment device 1 over the ground cover 10 while chipping the ground cover 10 with high-pressure water jetted from the first water jet nozzle 2a and the second water jet nozzle 2b. For this reason, it is preferable to fix the first casing portion 3a and the second casing portion 3b to a dolly 12.

[0053] The structure of the bogie 12 will be described with reference to Figures 3 to 5. Note that the specific structure of the bogie 12 shown in the figures is merely one example. The specific structure does not limit the present invention as long as the bogie has the first casing portion 3a and the second casing portion 3b mounted vertically so that the first casing portion 3a and the second casing portion 3b are aligned with the horizontal and rising surfaces of the floor covering.

[0054] The trolley 12 comprises a first frame body 12a for mounting the first casing portion 3a, a second frame body 12b for mounting the second casing portion 3b and the slide portion 4, a frame body 12c extending upward from the frame body 12b, a handle 12d hanging down from the upper part of the frame body 12c, two wheels 12e provided at the two lower corners of the frame body 12a, and two wheels 12f provided at the two lower corners of the frame pair 2b.

[0055] 5, the first frame body 12a is attached to the left and right sides 4c of the sliding portion 4 so as to be vertically positionally adjustable. Therefore, the position of the first frame body 12a can be vertically adjusted with respect to the second frame body 12b.

[0056] With reference to FIG. 6, the suction structure of the high-pressure water and gravel in the first casing portion 3a and the second casing portion 3b will be described.

[0057] As shown in Fig. 6, the first water jet nozzle 2a rotates inside the first casing part 3a. A substantially circular frame 14a is provided inside the first casing part 3a along the outer periphery of the rotation. A part of the frame 14a is open and connected to the suction ports 13a and 13b. Here, two suction ports 13a and 13b are used so that suction can be performed from either suction port, but when in use, one port is closed and high-pressure water and gravel are sucked in from the other port.

[0058] Similarly, a substantially circular frame 14b is provided inside the second casing portion 3b, and suction ports 13c and 13d connected to the frame 14b are provided. Similarly, high-pressure water and gravel are sucked in from one of the suction ports 13c and 13d.

[0059] Needless to say, it is sufficient that the casing portion is provided with at least one suction port.

[0060] Furthermore, even if an approximately circular frame is not provided inside the casing portion, as long as a suction port is provided in the casing portion, it is possible to suction high-pressure water and gravel inside, so an approximately circular frame is not essential.

[0061] As described above, by attaching one side of the first casing part 3a to the top of the second casing part 3b, the first casing part 3a and the second casing part 3b are arranged in an inverted L-shape, i.e., at a right angle. With this configuration, the horizontal part of the ground cover 10 is surface-treated by the first water jet nozzle 2a attached to the first casing part 3a, and the rising part is surface-treated by the second water jet nozzle 2b attached to the second casing part 3b arranged perpendicular to the first casing part 3a.

[0062] Therefore, a surface treatment device 1 is provided that can simultaneously treat two surfaces of a structure (such as a ground cover) that has a rising surface and a horizontal surface.

[0063] As shown in the drawing substitute photographs of Figures 7 and 8, it can be seen that the two sides have been neatly processed.

[0064] Furthermore, by making the height of the first casing part 3a adjustable relative to the slide part 4 attached to the second casing part 3b, it becomes possible to simultaneously treat two surfaces of a structure having a raised surface and a horizontal surface, even at sites where the raised surfaces have different heights.

[0065] By attaching the first casing part 3a and the second casing part 3b to a cart 12 and providing wheels 12e and 12f on the bottom of the cart 12, it is possible to simultaneously treat two surfaces of the structural part while moving the surface treatment device 1.

[0066] In the trolley 12, the first frame body 12a for mounting the first casing part 3a can be adjusted in height up and down relative to the second frame body 12b for mounting the second casing part 3b and the slide part 4, so that it is possible to simultaneously process two surfaces of a structure having a raised surface and a horizontal surface even at a site where the raised surfaces have different heights.

[0067] By providing suction ports in the first casing portion 3a and the second casing portion 3b, it becomes possible to perform work while sucking in high-pressure water and gravel during surface treatment.

[0068] By attaching brushes 11a and / or 11b to at least a portion of the periphery of the first casing part 3a and / or the second casing part 3b, it is possible to prevent high-pressure water and gravel from scattering outside the casing parts as much as possible.

[0069] Although the present invention has been described in detail above, the above description is merely illustrative of the present invention in every respect and is not intended to limit its scope. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. The constituent elements of the invention disclosed in this specification are each considered to be independent and stand alone as a single invention. Inventions in which the constituent elements are combined in any combination method are also included in the present invention. The specific expressions in this specification are merely illustrative, and the present invention also includes those that conceptualize the illustrative expressions. [Industrial Applicability]

[0070] The present invention is a surface treatment device and is industrially applicable. [Explanation of symbols]

[0071] 1 Surface treatment equipment 2a First water jet nozzle 2b Second water jet nozzle 3a First casing part 3b Second casing part 4 Slide section 4a groove 4b Fastening means 5a,5b rotary joint 6a, 6b High pressure water supply port 7a, 7b Rotation axis 8a, 8b Air motor 9a, 9b Injection nozzle 10 earth cover 11a, 11b Brush 12a First frame 12b Second frame 12c frame 12d Handle 12e,12f wheels 13a,13b,13c,13d Suction port 14a, 14b Frame

Claims

1. A surface treatment device for chipping a surface of a structure having two surfaces, a horizontal surface and a rising surface, a first water jet nozzle including a plurality of jet nozzles arranged in a line for jetting high-pressure water for chipping the surface of the horizontal plane; a second water jet nozzle including a plurality of jet nozzles arranged in a line to jet the high-pressure water for chipping the raised surface; a first casing portion provided along the horizontal plane and having a first rotating means attached thereto for rotating the entire first water jet nozzle about a first axis perpendicular to the horizontal plane; a second casing portion provided along the raised surface and having a second rotating means attached thereto for rotating the entire second water jet nozzle about a second axis perpendicular to the raised surface; a first suction port provided in the first casing portion; a second suction port provided in the second casing portion; a first high-pressure water supply port provided in the first rotating means for supplying the high-pressure water; a second high-pressure water supply port provided in the second rotating means for supplying the high-pressure water; Equipped with The high-pressure water has a pressure capable of turning the surface of the structure into gravel, The high-pressure water is supplied to the first high-pressure water supply port and the second high-pressure water supply port from an outside, The high-pressure water is supplied from the first high-pressure water supply port to the first water jet nozzle, The high-pressure water is supplied from the second high-pressure water supply port to the second water jet nozzle, the first rotating means rotates the entire first water jet nozzle about the first axis, and the second rotating means rotates the entire second water jet nozzle about the second axis, so that the high-pressure water jetted from each of the jet nozzles chips the surface of the structure while tracing a circular trajectory; A surface treatment device, characterized in that the high-pressure water and the gravel are sucked in through the first suction port and the second suction port.

2. A surface treatment device as described in claim 1, characterized in that one side of the first casing part is attached to the upper part of the second casing part.

3. 3. The surface treatment apparatus according to claim 2, wherein the first casing portion is vertically adjustable in height with respect to the second casing portion.

4. The second casing portion has a slide portion at an upper portion, The slide portion has grooves at the top and bottom for adjusting the height, The surface treatment device according to claim 3 , wherein the first casing portion is attached to the groove of the slide portion, thereby making the height of the first casing portion adjustable.

5. The first casing portion has a shape surrounding the first water jet nozzle, The surface treatment device according to claim 2 , wherein the second casing portion has a shape surrounding the second water jet nozzle.

6. The surface treatment apparatus according to claim 2 , further comprising a carriage for mounting said first casing portion and said second casing portion.

7. The cart is a first frame for mounting the first casing portion; a second frame body for mounting the second casing portion, The surface treatment apparatus according to claim 6, wherein the height of the first frame is vertically adjustable with respect to the second frame.

8. The surface treatment device according to claim 2 , further comprising a brush arranged to surround at least a portion of the periphery of the first casing part and / or the second casing part.

9. A surface treatment method for chipping a surface of a structure having two surfaces, a horizontal surface and a rising surface, comprising:

2. The method of claim 1, further comprising:

2. A surface treatment method, comprising chipping the surface of said raised surface by using a second water jet nozzle of a surface treatment apparatus according to claim 1.

10. The first casing part and the second casing part of the surface treatment device according to claim 1 are attached to a cart, 10. The surface treatment method according to claim 9, wherein the horizontal surface and the rising surface are simultaneously chipped while the carriage is moved on the structure.

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