JP2004025350A - Blasting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blasting machine which uniformly injects an abrasive material to a surface to be treated regardless of the inclination of an injection nozzle when supporting and rocking the injection nozzle. <P>SOLUTION: This blasting machine comprises: the injection nozzle 1 for injecting the abrasive material; a support rod 11 for supporting the injection nozzle 1 to be vertically rotatable to a surface S to be treated; and a retaining body 14 for retaining a crank rod 13 in a fixed position from the surface S to be vertically rotatable to the surface S. The crank rod 13 is rotated from the state where the injection nozzle 1 is turned vertically to the surface S, whereby the injection nozzle 1 is approached to the surface S in the state of the nozzle being inclined to the surface S. Accordingly, the distance until the abrasive material injected from the tip 1b of the injection nozzle 1 reaches the surface S is regularly kept constant. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a blasting apparatus that performs a surface treatment by spraying a blast material such as alumina, shot, grid, glass beads or sand onto a surface of a material such as a ship, an oil tank, a pier or a building wall.
[0002]
[Prior art]
Blasting is performed for cleaning the metal surface and for undercoating before painting. As an apparatus used for blast processing, for example, a blast apparatus described in Japanese Patent No. 3044606 is known. In this blast apparatus, a closed casing having an opening on the side that is in close contact with the surface to be processed has an injection nozzle portion swingably supported, and blast processing is performed by repeatedly swinging the injection nozzle portion. .
[0003]
In the above-mentioned publication, as an example in which a crank mechanism is connected to an injection nozzle portion to swing, the other end of a connecting rod pivotally attached to a crank lever fixed to a rotation shaft of a swing motor is used to swing the injection nozzle. A configuration is described in which the injection nozzle portion is pivotally attached to an end portion of a moving plate, and the injection nozzle portion is repeatedly rocked via a crank lever and a continuous rod by rotation of a rocking motor. In this blast device, the injection nozzle portion swings around the spherical bulging portion.
[0004]
[Problems to be solved by the invention]
In the blast device having the above-described configuration, since the injection nozzle portion swings around the spherical bulging portion, the distance until the blast material injected from the tip of the nozzle opening of the injection nozzle portion reaches the surface to be processed is: It changes according to the swing angle of the injection nozzle portion. Therefore, when the swing angle of the injection nozzle portion is large, the blowing force of the blast material to the surface to be processed is not constant within the swing range of the injection nozzle portion, so that it is difficult to perform uniform blast processing.
[0005]
In view of the above, the present invention provides a blast apparatus capable of uniformly spraying a blast material onto a surface to be processed, regardless of the inclination angle of the injection nozzle, when supporting and swinging the injection nozzle.
[0006]
[Means for Solving the Problems]
The blast device of the present invention includes an injection nozzle for injecting a blast material, a support rod for rotatably supporting the injection nozzle in a direction perpendicular to a surface to be processed, a crank rod connected to the support rod, and a crank rod. And a holding body that is rotatably held at a fixed position from the processing surface in a direction perpendicular to the surface to be processed.
[0007]
According to the present invention, by rotating the crank rod around the crank rod holding portion of the holder from the state in which the injection nozzle is oriented perpendicular to the surface to be processed, the injection nozzle is By approaching the surface to be processed in an inclined state, the distance until the blast material injected from the tip of the injection nozzle reaches the surface to be processed can always be kept constant.
[0008]
Further, the blast apparatus of the present invention is provided with a shield hood having a through hole for surrounding the injection nozzle and opening a side in close contact with the surface to be processed and a hose for supplying a blast material to the injection nozzle, Preferably, a handle for operating the crank rod is provided outside the hood.
[0009]
This makes it possible to prevent dust and blast material generated by the blasting process from being scattered, and to apply the operating force to the crank rod from the outside of the shield hood using the handle so that the inclination angle and the position of the injection nozzle can be adjusted to an appropriate position. Can be easily held.
[0010]
In addition, since the hose for supplying the blast material to the injection nozzle is held at the center of the through-hole by a spring, the followability of the hose to changes in the inclination angle and position of the injection nozzle can be improved.
[0011]
Furthermore, if the blasting device of the present invention is provided with a stopper for restraining the movable range of the injection nozzle on the handle, the holder, the crank rod, or the like, the blast material injected from the tip of the injection nozzle is processed. The tilt angle and position of the injection nozzle can be adjusted within a range where the distance to reach the surface can always be kept constant.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
1 is a perspective plan view of a blast device according to an embodiment of the present invention, FIG. 2 is a perspective view of a left side, FIG. 3 is a right side view, and FIG. 4 is a front view. 5A and 5B are diagrams illustrating details of a support portion of the ejection nozzle, wherein FIG. 5A is a diagram illustrating an assembled state of the ejection nozzle, and FIG. 5B is a diagram illustrating a separated state of the ejection nozzle. FIG. 6 is a left side perspective view showing the operation state of the injection nozzle.
[0013]
In the blast device of the present embodiment, an injection nozzle 1 for injecting a blast material is surrounded by a shield hood 2 for preventing scattering of dust and the like. The shield hood 2 has an opening on the side that is in close contact with the surface S to be processed, is made of a lightweight and robust fiber reinforced plastic (FRP), and its inner surface is coated with a solid ceramic resin coating or the like.
[0014]
A main rib 21 surrounding the opening is provided in the opening of the shield hood 2 on the side in close contact with the surface S to be processed. A shield rubber 22 is provided on the contact surface of the shield hood 2 with the surface to be processed S so as to be able to adhere to the surface to be processed S. The shield rubber 22 is attached to a tension plate 23 made of FRP, and is pressed against the surface S to be processed by a spring 24 provided between the main rib 21 and the tension plate 23. The space between the main rib 21 and the tension plate 23 is sealed by a sealing rubber 25. The main rib 21 and the tension plate 23 are connected by a universal joint 26 so that the shield rubber 22 and the tension plate 23 can be exchanged.
[0015]
The shield hood 2 is provided with a through-hole 27 on the side facing the processing surface S and on the side facing the surface 3, through which the hose 3 that supplies the blast material to the injection nozzle 1 passes. An inner bellows 31 and an outer bellows 32 are provided in a portion of the hose 3 penetrating the through-hole 27 in order to prevent dust and the like in the shield hood 2 from scattering from the through-hole 27 to the outside. A tension is applied to the inner bellows 31 from above and below the through hole 27 by a spring 33 so that the hose 3 is held near the center of the through hole 27. The outer bellows 32 is provided so as to surround the hose 3 and the through hole 27 outside the inner bellows 31.
[0016]
The injection nozzle 1 is installed via a fixture 12 on a support rod 11 held in parallel with the surface S to be processed. The fixture 12 is slidable left and right along the axis of the support rod 11 and is rotatable around the support rod 11. Further, as shown in FIG. 5, the injection nozzle 1 is provided with a turning shaft 1a at the lower portion, and the turning shaft 1a is rotated around the turning shaft 1a by fitting the turning shaft 1a into the support hole 12a of the fixture 12, that is, the support rod 11a. Can be rotated in the direction perpendicular to the axis of.
[0017]
FIG. 1 shows the initial state. At this time, the injection port 1b of the injection nozzle 1 is vertically opposed to the surface S to be processed. The injection nozzle 1 can rotate in the direction perpendicular to the axis of the support rod 11 while sliding left and right along the axis of the support rod 11 as described above. Each can be tilted up to about 28 °. In this case, since the injection nozzle 1 slides in parallel to the processing surface S and tilts left and right, the distance until the blast material injected from the injection port 1b at the tip of the injection nozzle 1 reaches the processing surface S Does not change much.
[0018]
It should be noted that dustproof brushes 12b are provided on the left and right sides of the attachment 12 so as to contact the support rod 11. The dustproof brush 12b removes dust adhering to the support rod 11 when the fixture 12 slides, and plays a role of preventing the dust from hindering the slide of the fixture 12. Further, it is also possible to provide a dust-proof guard on the front side (the surface S to be processed) of the fixture 12 to prevent dust from being blasted from adhering to the support rod 11.
[0019]
At the left and right ends of the support rod 11, a substantially U-shaped crank rod 13 is connected, and the crank rod 13 is rotatably held by holding members 14 provided on the left and right outer sides of the shield hood 2. An operating handle 15 is provided on the operating shaft 13a of the left crank rod 13. The crank rod 13 rotates around the operation shaft 13 a in response to the operation of the handle 15.
[0020]
The left holding member 14 is provided with stoppers 16a and 16b for restraining the rotation angle of the handle 15. The stopper 16a restrains the upward rotation operation of the handle 15 at a predetermined angle. On the other hand, the stopper 16b restrains the downward rotation operation of the handle 15 at a predetermined angle.
[0021]
FIG. 2 shows an initial state (the rotation angle of the handle 15 is 0 °). At this time, the injection port 1b of the injection nozzle 1 is vertically opposed to the surface S to be processed. When the handle 15 is operated in the up-down direction (left-right direction in FIG. 2) from this initial state, the crank rod 13 rotates up and down, and the support rod 11 moves up and down so as to draw an arc around the operation shaft 13a. (See FIG. 6).
[0022]
With the operation of the support rod 11, the injection nozzle 1 moves from the initial state in FIG. 2 in the vertical direction and in the direction approaching the processing surface S. At this time, since the injection nozzle 1 is rotatable around the support rod 11, the injection nozzle 1b is rotated so as to tilt the injection port 1b in the vertical direction. Thereby, the distance until the blast material injected from the injection port 1b at the tip of the injection nozzle 1 reaches the surface to be processed S is always kept constant irrespective of the vertical inclination angle of the injection nozzle 1.
[0023]
At this time, since the hose 3 is held near the center of the through-hole 27 by the inner bellows 31 and the spring 33, the followability of the hose 3 to the change in the inclination angle and the position of the injection nozzle 1 is improved, and the hose 3 cannot be easily moved. It can be prevented from being damaged due to excessive force. Even if the inner bellows 31 expands and contracts at this time, the outer bellows 32 prevents dust and the like in the shield hood 2 from scattering to the outside.
[0024]
When the handle 15 is operated upward (to the right in FIGS. 2 and 6) to come into contact with the stopper 16a, the injection nozzle 1 causes the injection nozzle 1 to perform its injection as shown by the dashed line (solid line in FIG. 6) in FIG. The mouth 1b can be inclined upward by about 28 ° from the initial state. On the other hand, when the handle 15 is operated downward (to the left in FIGS. 2 and 6) to come into contact with the stopper 16b, the injection nozzle 1 moves as shown by the dashed line in FIG. 2 (the dashed line in FIG. 6). The injection port 1b can be inclined downward by about 28 °.
[0025]
In addition, the blast device according to the present embodiment includes a fitting 4a for the dust collection hose 4 below the shield hood 2 and an intake pressure adjusting valve 5 above the shield hood 2. The air inside the shield hood 2 is sucked by the dust collection hose 4 connected to the fixture 4a, so that the shield hood 2 is attracted to the surface S to be processed, and the dust and the like generated by the blasting process are collected to the outside. Is discharged. The intake pressure adjusting valve 5 automatically adjusts the negative pressure in the shield hood 2 sucked by the dust collection hose 4.
[0026]
An arm insertion bellows 6 for working inside the hood is provided on the right side surface of the shield hood 2, and a viewing window 7 for checking the inside of the hood is provided on the front upper side of the shield hood 2. FIG. 7 is a perspective plan view showing details of the arm insertion bellows. As shown in FIG. 7, the bellows 6 for inserting an arm are freely deformed in the shield hood 2. The operator can insert the arm into the bellows 6 for arm insertion, hold the spray nozzle 1 and perform the blast processing.
[0027]
FIGS. 8A and 8B show details of the work glove 8 attached to the tip of the bellows 6 for arm insertion, wherein FIG. 8A is a top view and FIG. 8B is a side view. The work glove 8 is rotatably attached to the tip 6 a of the arm insertion bellows 6. The upper part of the work glove 8 is provided with a guard 8a made of FRP. The inside of the shield hood 2 becomes a negative pressure by suction from the dust collection hose 4, and the work glove 8 expands due to the negative pressure, but the guard 8a prevents the instep from expanding. Thus, the work glove 8 comes into close contact with the back of the worker's hand without being separated, so that the work can be easily performed by grasping the spray nozzle 1 with the work glove 8.
[0028]
As described above, in the blast device according to the present embodiment, by operating the handle 15 in the up-down direction, the distance until the blast material injected from the injection port 1b of the injection nozzle 1 reaches the surface S to be processed is defined as: Since the spray nozzle 1 can always be kept constant irrespective of the vertical inclination angle, the blast processing can be performed by uniformly spraying the blast material from the spray nozzle 1 to the surface S to be processed.
[0029]
Further, when the handle 15 is operated up and down by the action of the stoppers 16a and 16b, the angle of the injection nozzle 1 changes within a range of about 28 ° up and down, so that the injection nozzle 1 is moved within the range of about 28 ° up and down. It is possible to perform a uniform blasting process by reciprocating and moving the injection nozzle 1 from the left to the right of the support rod 11 or from the right to the left at a pitch of, for example, about 20 mm.
[0030]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0031]
(1) An injection nozzle for injecting the blast material, a support rod for supporting the injection nozzle rotatably in a direction perpendicular to the surface to be processed, a crank rod connected to the support rod, and a constant crank rod from the surface to be processed. The blast material sprayed from the tip of the spray nozzle reaches the work surface regardless of the angle of inclination of the spray nozzle by having a holder that holds the workpiece so that it can rotate in the direction perpendicular to the surface to be processed. Can be kept substantially constant, and uniform blasting can be performed.
[0032]
(2) A shield hood having a through hole for surrounding the injection nozzle and opening a side that is in close contact with the surface to be processed, and having a hose for supplying a blast material to the injection nozzle is provided, and a crank rod is provided outside the shield hood. By providing a handle for operating the blasting device, it is possible to prevent dust and blast material generated by the blasting process from being scattered, and it is possible to easily perform a uniform blasting process by operating the handle.
[0033]
(3) The hose that supplies the blast material to the injection nozzle is configured to be held at the center of the through hole by a spring, so that the hose can follow the change in the inclination angle and the position of the injection nozzle. Damage caused by excessive force can be prevented.
[0034]
(4) By providing a stopper for restraining the movable range of the injection nozzle, within a range in which the distance until the blast material injected from the tip of the injection nozzle reaches the surface to be processed can always be kept constant. Thus, uniform blasting can be easily performed.
[Brief description of the drawings]
FIG. 1 is a perspective plan view of a blast device according to an embodiment of the present invention.
FIG. 2 is a left side perspective view of the blast device of FIG. 1;
FIG. 3 is a right side view of the blast device of FIG. 1;
FIG. 4 is a front view of the blast device of FIG. 1;
5A and 5B are diagrams showing details of a support portion of the ejection nozzle, wherein FIG. 5A is a diagram showing an assembled state of the ejection nozzle, and FIG. 5B is a diagram showing a separated state of the ejection nozzle.
FIG. 6 is a left side perspective view showing an operation state of an injection nozzle.
FIG. 7 is a perspective plan view showing details of an arm insertion bellows.
8A and 8B are details of a working glove to be attached to the tip of the bellows for arm insertion, wherein FIG. 8A is a top view and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Injection nozzle 1a Revolving shaft 1b Injection port 2 Shield hood 3 Hose 4 Dust collection hose 4a Attachment 5 Inlet pressure regulating valve 6 Arm insertion bellows 7 View window 8 Work glove 8a Guard 11 Support rod 12 Attachment 12a Support hole 12b Dustproof Brush 13 Crank rod 13a Operation shaft 14 Holder 15 Handle 16a, 16b Stopper 21 Main rib 22 Shield rubber 23 Tension plate 24 Spring 25 Sealed rubber 26 Universal joint 27 Through port 31 Inner bellows 32 Outer bellows 33 Spring

Claims (4)

An injection nozzle for injecting the blast material, a support rod for rotatably supporting the injection nozzle in a direction perpendicular to the surface to be processed, a crank rod connected to the support rod, and a constant crank rod from the surface to be processed And a holding body that holds the workpiece to be rotatable in a vertical direction with respect to the surface to be processed. A shield hood provided with a through hole for surrounding the injection nozzle and opening a side that is in close contact with the surface to be processed and a hose for supplying a blast material to the injection nozzle is provided, and the shield hood is provided outside the shield hood. The blast device according to claim 1, further comprising a handle for operating the crank rod. The blast device according to claim 2, further comprising a spring that holds the hose at the center of the through hole. The blast device according to any one of claims 1 to 3, further comprising a stopper for restricting a movable range of the injection nozzle.

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