Injection direction control member, surface treatment device, and surface treatment method

Abstract

To efficiently treat a processing target surface having protrusions.SOLUTION: An injection direction control member, which controls the injection direction of an injected material, comprises a frustum-shaped jig body having a base end opening through which the injected material flows in, and a tip opening facing the processing target surface. A notch is provided on the side surface of the jig body on the tip opening side.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a jet direction control member for controlling the jet direction of a jet of a jet, a surface treatment device using the jet direction control member, and a surface treatment method. [Background technology]

[0002] For example, in construction work for painting the walls of structures, abrasion work is carried out to remove foreign matter from the walls. There are various methods for the abrasion work, but generally, a blasting machine is used to abrade the surface to be treated.

[0003] As disclosed in Patent Document 1, the blasting device is equipped with a cup-shaped case whose opening is pressed against the surface to be treated, a nozzle that sprays an abrasive material inside the case toward the surface to be treated, and a nozzle head equipped with a recovery port that sucks in the sprayed abrasive material and dust generated by colliding the abrasive material with the surface to be treated. The grinding operation of the surface to be treated is performed by moving the nozzle head while pressing it against the surface to be treated. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-172295 A Summary of the Invention [Problem to be solved by the invention]

[0005] The blasting machine described in Patent Document 1 is designed to collide abrasives with the surface to be treated in a direction substantially perpendicular to the surface, and is therefore effective when the surface to be treated is relatively smooth. However, in bridge repainting work, for example, the steel joints in the bridge's girders and counter-girders may become the surface to be treated.

[0006] In general, the structure of a steel joint is such that a pair of splice plates are arranged so as to straddle and sandwich adjacent steel materials, and the pair of splice plates and the steel materials are connected with bolts. In this case, protrusions are generated on the surface of the steel joint due to the bolts and nuts, and the side and details of the protrusions cannot be accurately ground by simply colliding the grinding material in a substantially perpendicular direction. For this reason, when the surface to be treated is a steel joint, the grinding work must be repeated many times by changing the direction of the nozzle head, which requires a lot of time and effort.

[0007] The present invention has been made in consideration of the above problems, and a main object of the present invention is to efficiently treat a treatment target surface having protrusions. [Means for solving the problem]

[0008] In order to achieve this objective, the injection direction control member of the present invention is an injection direction control member that controls the injection direction of an injection material, and is characterized in that it includes a frustum-shaped jig body having a base end opening into which the injection material flows and a tip end opening which faces the surface to be treated and has a smaller diameter than the base end opening, and a notch is provided on the side of the jig body, on the tip opening side.

[0009] The injection direction control member of the present invention is characterized in that a cylindrical skirt portion is provided at the tip opening, and the cutout portion is provided in the skirt portion instead of the jig body.

[0010] The jet direction control member of the present invention is characterized in that the jet material is an abrasive material.

[0011] The surface treatment device of the present invention is a surface treatment device comprising the spray direction control member of the present invention and a surface treatment mechanism for spraying a spray material toward a surface to be treated, characterized in that the surface treatment mechanism includes an inner tube into which an injection nozzle for spraying the spray material is inserted at its base end, and a nozzle head covering the inner tube, and a spray direction control member is removably provided at the tip side of the inner tube facing the surface to be treated.

[0012] The surface treatment device of the present invention is characterized in that the surface treatment mechanism is a blasting device.

[0013] The surface treatment method of the present invention is characterized in that a protrusion portion that is to be positioned on the surface to be treated is placed on the inside of the jig body of the spray direction control member, the tip opening is abutted against the surface to be treated, and the spray material is sprayed.

[0014] The surface treatment method of the present invention is characterized in that the abrasive is sprayed while the spray direction control member is appropriately slidably moved on the surface to be treated.

[0015] According to the injection direction control member of the present invention, the jig body has a frustum-shaped base end opening through which the injection material flows and a tip end opening facing the surface to be treated, and the tip end opening has a smaller diameter than the base end opening, so that the inner surface of the side wall of the jig body is formed into a tapered surface that tapers toward the tip end opening. This makes it possible to cause the injection material flowing in from the base end opening to collide with the inner surface of the side wall of the jig body, and to change the injection direction from the direction toward the tip end opening to the direction toward the inside of the jig body.

[0016] Therefore, if there is a protrusion on the surface to be treated against which the spray material is to be collided, by positioning this protrusion on the inside of the jig body, the spray material can be collided not only with the top surface of the protrusion but also with the entire outer surface including the sides, making it possible to carry out surface treatment work efficiently.

[0017] In addition, by attaching a skirt to the tip opening of the jig body, the ejected object can be impacted over the entire height even if the protrusion is tall. Furthermore, by providing a notch in the jig body, the ejected object and dust generated by the impact of the ejected object can be discharged outside the jig body and collected.

[0018] Therefore, in base preparation for repainting work and the like, when the surface to be treated is a steel joint where there are protruding parts such as bolts and nuts, by adopting a surface treatment device having a spray direction control member attached to a blasting device that sprays abrasive material, and a surface treatment method using this surface treatment device, it is possible to eliminate the trouble of repeatedly changing the spray direction of the abrasive material to treat the sides of the protruding parts, as has been done in the past, and to significantly shorten work times. Effect of the Invention

[0019] According to the present invention, the sprayed object can be collided not only with the top surface of the protrusion but also with the entire outer surface including the side surfaces, making it possible to efficiently treat the treatment target surface where the protrusions are present. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a diagram showing a surface treatment device of the present invention. [Diagram 2] FIG. 2 is a diagram showing an injection direction control member of the present invention. [Diagram 3] FIG. 2 is a diagram showing a jig body constituting the injection direction control member of the present invention. [Figure 4] 4A to 4C are diagrams showing another example (part 1) of the injection direction control member of the present invention. [Diagram 5] 6A and 6B are diagrams showing another example (part 2) of the injection direction control member of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The present invention controls the direction of injection of an injection material toward a surface to be treated, and impinges the injection material against the entire outer surface including not only the upper surface but also the side surfaces of protrusions present on the surface to be treated. Although there is no limitation on the surface to be treated, the protrusions present on the surface to be treated, the type of injection material, and the surface treatment, in this embodiment, a case where a blasting process is performed on a surface to be treated having protrusions due to bolts and nuts is taken as an example, and the injection direction control member, the surface treatment device, and the surface treatment method will be described in detail with reference to Figs. 1 to 5.

[0022] <<Surface treatment equipment>> As shown in FIG. 1( a ), the surface treatment device 100 is composed of a jet direction control member 10 and a blast device 50 .

[0023] <<Blast Device>> The blasting device 50 is a device that sprays abrasive material M toward a surface F to be treated, causing the abrasive material M to collide with foreign matter on the surface F to be treated and remove it, and is equipped with a blast hose 60, a nozzle head 70, and a recovery hose 80.

[0024] 1(b), the blast hose 60 supplies the abrasive material M transported together with compressed air to an injection nozzle 61 attached to the tip, and the tip of the injection nozzle 61 is inserted into a nozzle head 70. The base end of the blast hose 60 is connected to a pressurized tank (not shown) in which the abrasive material M is stored.

[0025] The nozzle head 70 is, for example, a cone-shaped case with a tip side 71 facing the surface to be treated F in the direction in which the abrasive material M is sprayed from the spray nozzle 61, and a collection section 72 is provided near the tip side 71 for collecting the abrasive material M sprayed from the spray nozzle 61 and dust S including foreign matter peeled off and removed from the surface to be treated F by the abrasive material M.

[0026] Further, a sealing material 73 is provided on the tip side 71 facing the surface to be treated F to seal the gap with the surface to be treated F. The sealing material 73 is, for example, a brush, and prevents the abrasive material M sprayed from the spray nozzle 61 and dust S such as foreign matter removed by the abrasive material M from leaking out.

[0027] The nozzle head 70 is provided with an inner cylinder 74. The inner cylinder 74 has a cone shape similar to the nozzle head 70, and the injection nozzle 61 is inserted into a base end side 741. A tip side 742 forms approximately the same plane as the tip side 71 of the nozzle head 70.

[0028] Further, a through hole 743 is formed on the outer surface of the inner cylinder 74 at a position facing the collection section 72 provided on the nozzle head 70. Furthermore, a collection flow path 90 for collecting the dust S is formed between the outer surface of the inner cylinder 74 and the inner wall surface of the nozzle head 70.

[0029] One end of the recovery hose 80 is connected to the recovery unit 72, and the other end is connected to a dust collector (not shown). By operating this dust collector, the above-mentioned dust S generated inside the nozzle head 70 can be sucked and recovered from the recovery hose 80 connected to the recovery unit 72 via the through hole 743 provided in the inner cylinder 74, or via the gap between the tip side 742 of the inner cylinder 74 and the sealing material 73 and the recovery flow path 90.

[0030] In the above-mentioned blasting device 50, the abrasive M is sprayed from the spray nozzle 61 attached to the blast hose 60 in a straight line (approximately perpendicular to the surface F) toward the surface F to be treated. In this case, if a protrusion P such as a bolt or nut is present on the surface F to be treated, the abrasive M cannot collide with the side surface. Therefore, a spray direction control member 10 is attached to the blasting device 50.

[0031] <<Injection direction control member>> As shown in FIG. 1( b ), the injection direction control member 10 includes a jig body 20 detachably attached to a tip side 742 of an inner cylinder 74 provided in a nozzle head 70 , and a recovery port 30 .

[0032] 2(a) and (b), the jig body 20 is a cylindrical body having a truncated cone shape, and the tip opening 21 is formed to have a smaller diameter than the base opening 22. Therefore, the inner surface of the side wall 23 is formed to have a taper that tapers from the base opening 22 toward the tip opening 21.

[0033] The tip opening 21 is provided with a recovery port 30, and the base opening 22 is attached to the tip side 742 of the inner tube 74. The attachment structure of the base opening 22 to the tip side 742 of the inner tube 74 may be any structure as long as it is detachable.

[0034] The recovery port 30 is a cutout provided on the side wall 23 on the side of the tip opening 21, and is a communication portion for communicating the internal space of the jig body 20 with the space surrounded by the jig body 20 and the sealing material 73. The shape and number of the recovery ports 30 may be any, and FIG. 2(b) shows an example in which a plurality of recovery ports 30 are provided at intervals in the circumferential direction of the tip opening 21. The abrasive M sprayed from the spray nozzle 61 and dust S such as foreign matter removed by the abrasive M are sucked and collected by the recovery hose 80 from the recovery port 30 via a recovery flow path 90.

[0035] <Surface treatment method using surface treatment device> When surface treating a surface F including a protrusion P using the surface treatment device 100 in which the above-mentioned jet direction control member 10 is attached to a blasting device 50, first, as shown in Figure 1 (b), the protrusion P is placed inside the jet direction control member 10, and the jet direction control member 10 and the sealing material 73 are pressed against the surface F to be treated.

[0036] In this state, the abrasive M is sprayed from the spray nozzle 61 of the blasting device 50, and the abrasive M is caused to flow into the inner space from the base end opening 22 of the jig body 20. Then, in the inner space of the jig body 20, a part of the abrasive M collides with the inner surface of the side wall 23 as shown in Fig. 3(a), and the spray direction of the colliding abrasive M is changed from the direction toward the tip opening 21 (the direction perpendicular to the surface F to be treated) to the direction toward the inside of the jig body 20.

[0037] As a result, the abrasive material M collides with not only the top surface but also the side surfaces of the protrusions P surrounded by the jig body 20. Therefore, the blasting device 50 can finish grinding the entire outer surface of the protrusions P while keeping the tip side 71 of the nozzle head 70 facing the surface F to be treated. This eliminates the need to repeatedly change the direction in which the abrasive material M is sprayed by changing the orientation of the nozzle head 70 as in the conventional method, thereby eliminating the need to process the side surfaces of the protrusions P.

[0038] The height H and diameter D of the tip opening 21 of these jig bodies 20 can be changed as appropriate according to the height, size, shape, etc. of the protrusion P present on the processing target surface F. For example, the jig body 20 in Fig. 3(b) has a flat protrusion P, and therefore, as compared with the jig body 20 in Fig. 3(a), the diameter D1 of the tip opening 21 is made larger and the height H1 is made smaller.

[0039] 3(c) is an example in which the diameter D2 of the tip opening 21 is smaller and the height H2 is also lower than that of the jig body 20 in FIG. 3(a) because the protrusion P is small. In this way, by appropriately changing the shape of the injection direction control member 10 to change the taper and height of the side wall 23, it is possible to control the injection direction of the abrasive M and the height range at which the abrasive M can collide after changing the injection direction. As a result, regardless of the shape of the protrusion P present on the processing target surface F, the abrasive M can be collided efficiently and uniformly against the entire outer surface (top and side surfaces) of the protrusion P.

[0040] It is advisable to prepare in advance as attachments various shapes of jet direction control members 10 with different heights H of the jig body 20 and diameters D of the tip openings 21. In this way, a jet direction control member 10 of a size suitable for the protrusions P can be appropriately selected at the work site and attached to the blasting device 50. This makes it possible to carry out the grinding work of the treatment target surface F where the protrusions P exist quickly and with high work accuracy.

[0041] However, when the height of the protrusion P is large, there are cases where the abrasive M cannot be collided with the entire side surface of the protrusion P simply by adjusting the height H of the jig body 20 or the diameter D of the tip opening 21. Therefore, as shown in Fig. 4(a), a skirt portion 40 may be provided on the jig body 20.

[0042] <Other examples of jet direction control components (part 1)> The injection direction control member 10 includes a jig body 20, a recovery port 30, and a skirt portion 40. The skirt portion 40 is a cylindrical body having the same diameter as the tip opening 21, and the recovery port 30 is provided in place of the jig body 20.

[0043] <Surface treatment methods using surface treatment equipment: other examples> When performing surface treatment of a treatment target surface F having a protrusion P using a surface treatment device 100 in which a jet direction control member 10 having such a shape is attached to a blasting device 50, the abrasive material M is sprayed while moving the nozzle head 70 so that the jet direction control member 10 with the protrusion P arranged on the inside slides over the treatment target surface F, as shown in Figure 4(b), for example.

[0044] In this way, the abrasive M, whose spray direction has been changed upon collision with the side wall 23 of the jig body 20, collides with the upper half of the side surface of the protrusion P close to the spray direction control member 10. On the other hand, the abrasive M, whose spray direction has been changed upon collision with the side wall 23 of the jig body 20, collides with the lower half of the side surface of the protrusion P away from the spray direction control member 10.

[0045] In this way, by appropriately adjusting the height of the skirt portion 40 and appropriately moving the nozzle head 70 so that the injection direction control member 10 slides on the surface to be treated F, it is possible to perform the grinding work of the entire outer surface reliably and efficiently even when the height of the protrusion P existing on the surface to be treated F is large. In addition, the abrasive M can be reliably collided with the surface to be treated around the protrusion P, making it possible to perform the grinding work with high precision while significantly shortening the working time.

[0046] <Other examples of jet direction control components (part 2)> In the injection direction control member 10, when the abrasive material M collides with the side wall 23 of the jig body 20 and the injection direction is changed, a part of it may collide with the abrasive material M injected from the injection nozzle 61, as shown in Figure 5 (a).

[0047] Then, the amount of abrasive M that reaches the side surface of the protrusion P decreases, and there is a possibility that a sufficient grinding effect cannot be obtained. Therefore, as shown in Fig. 5(b), the injection direction control member 10 may be provided with a blocking member 24 that blocks a part of the abrasive M that is injected from the injection nozzle 61 and flows into the jig body 20.

[0048] The blocking member 24 may have any shape or be installed at any position as long as it can block the abrasive M sprayed from the spray nozzle 61, which may collide with the abrasive M whose spray direction has been changed. In Figs. 5(b) and (c), the blocking member 24 is composed of a donut-shaped blocking plate 241 and a support member 242.

[0049] The donut-shaped blocking plate 241 is attached to the base end opening 22 side of the jig body 20 via a support member 242. The size of the blocking plate 241 is, for example, formed such that the inner diameter is large enough to expose the upper surface of the protrusion P, and the outer diameter is smaller than the base end opening 22 of the jig body 20. This makes it possible to suppress the phenomenon in which the abrasive M that collides with the side wall 23 of the jig body 20 and has its spray direction changed is reduced, and makes it possible for the abrasive M to reach the side surface of the protrusion P efficiently.

[0050] The injection direction control member 10, the surface treatment device 100 and the surface treatment method of the present invention are not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0051] For example, in the present embodiment, as shown in Figures 2(a) and (b), the jig body 20 of the injection direction control member 10 is formed in a truncated cone shape, but this is not limited to this. For example, it may be formed in a polygonal truncated pyramid shape, or a truncated pyramid shape that follows the outer shape of the protrusion P.

[0052] Furthermore, the surface treatment method of sliding the spray direction control member 10 on the treatment surface F described with reference to Figure 4 (b) is not limited to the case where the spray direction control member 10 has a skirt portion 40, and may be carried out in the case where the spray direction control member 10 does not have a skirt portion 40.

[0053] Furthermore, in the present embodiment, the case where the injected object is the abrasive material M has been taken as an example, but the injected object is not limited in any way, and the surface treatment mechanism to which the injection direction control member 10 is attached is not limited to the blasting device 50. Any work can be adopted as long as it is a work for injecting an injected object and performing surface treatment on the treatment target surface F. [Explanation of symbols]

[0054] 100 Surface treatment device 10. Injection direction control member 20 Jig body 21 Tip opening 22 Proximal opening 23 Side wall 24 Blocking member 241 Barrier 242 Support member 30 Collection port (cutout) 40 Skirt Section 50 Blasting equipment (surface treatment mechanism) 60 Blast Hose 61 Injection nozzle 70 Nozzle Head 71 Tip side 72 Recovery Department 73 Sealing material 74 Inner cylinder 741 Base end 742 Tip side 743 Through hole 80 Recovery hose 90 Recovery channel M Abrasive (jet) S dust

Claims

1. An injection direction control member for controlling an injection direction of an injection object, The jig body includes a frustum-shaped jig body having a base end opening into which the jet flows and a tip end opening facing the treatment target surface and having a smaller diameter than the base end opening, The injection direction control member is characterized in that a notch is provided on a side surface of the jig body on the tip opening side.

2. 2. The injection direction control member according to claim 1, The tip opening is provided with a tubular skirt portion, 4. An injection direction control member, comprising: a jig body having a skirt portion and a notch portion formed in the skirt portion.

3. 2. The injection direction control member according to claim 1, A jet direction control member, characterized in that the jet material is an abrasive material.

4. An injection direction control member according to claim 1 or 2; a surface treatment mechanism that sprays a spray material toward a surface to be treated; A surface treatment device comprising: the surface treatment mechanism includes an inner cylinder into which an injection nozzle for injecting the injection material is inserted at a base end thereof, and a nozzle head covering the inner cylinder; the injection direction control member is detachably provided on a tip side of the inner cylinder facing the surface to be treated, the tip side being opposite to the surface to be treated.

5. The surface treatment device according to claim 4, The surface treatment device, wherein the surface treatment mechanism is a blasting device.

6. A surface treatment method using the surface treatment device according to claim 4 or 5, With a protrusion portion located on the treatment target surface disposed on the inner side of the jig body of the injection direction control member, the tip opening is brought into contact with the treatment target surface; A surface treatment method comprising spraying the above-mentioned jet.

7. The surface treatment method according to claim 6, The surface treatment method comprises spraying an abrasive while sliding the spray direction control member appropriately on the surface to be treated.

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