KR20190013031A - Device for preventing scattering of paint for spray gun - Google Patents

Abstract

The present invention relates to a paint scattering prevention device which can suppress paint particles scattered from a painting spray gun. The paint scattering prevention device comprises: a fixed unit detachably fixed to a nozzle of the painting spray gun; a hollow cylindrical blocking unit arranged to be separated from the fixed unit in a spraying direction of the spray gun from the fixed unit; and a connection rib extended between the fixed unit and the blocking unit so as to support the blocking unit against the fixed unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a paint spray prevention apparatus for spray gun,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a paint sprayer for preventing paint splattering, and more particularly, to a paint splatter preventing device that can minimize paint particles scattered from a spray gun.

[0003] As a spraying type coating method, there are widely used an air spray method for spraying paint with compressed air, an airless spray method for spraying paint directly, and the like.

These spraying methods commonly use a spray tip, commonly referred to as a spay gun, which includes a nozzle through which paint particles are sprayed and a spray nozzle that selectively permits or blocks the passage of paint or air into the nozzle And a handle for facilitating gripping and handling. The whole shape is similar to a gun, so it is called a gun.

However, since such a spray coating method spray paint particles onto the paint surface, paint particles scattered to the periphery may not be fixed on the paint surface. Such scattered paint particles are also a waste of materials themselves, and can penetrate into the respiratory system of workers and damage their health. In addition, they can be fixed at unexpected places to deteriorate paint quality. In particular, The scattering becomes worse and spreads to the surrounding environment, which causes the smell and other complaints.

To prevent this, techniques for attaching a cone or pyramid cover to the nozzle end of the spray gun and spraying paint only in the inner space of the cover have been developed.

Japanese Patent Application Laid-Open No. 1998-075811 discloses a technique for physically shielding scattered paint particles by fixing a quadrangular pyramid-shaped cover to the nozzle end of a spray gun as an example of such prior art.

However, since such a cover covers the view of the operator, it is difficult for the operator to confirm the required surface or to check whether the coating is sufficiently advanced. This problem is the same, even if the cover itself is made of a transparent material, because the scattered paint particles adhere to the inner surface of the cover, resulting in the cover becoming opaque. In addition, if the cover is in direct contact with the coating surface, there may be a problem of leaving traces on the coating surface. Also, as the weight of the cover is added, the operator may become tired more easily, which can become worse as the cover is attached to the cover.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a paint scattering prevention device capable of preventing scattering of a paint as much as possible without blocking an operator's view.

Another object of the present invention is to provide a paint scattering prevention device capable of restraining the paint scattering prevention device itself from contacting the paint surface.

Another object of the present invention is to provide a relatively lightweight paint fog-scattering apparatus.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings.

A paint spraying prevention device of a spray gun for painting according to the present invention comprises a fixing part detachably fixed to a nozzle of a spray gun for painting and a hollow cylindrical blocking part arranged to be spaced apart from the fixing part in the spraying direction of the spray gun, And a connecting piece extending between the fixing part and the blocking part to support the blocking part against the fixing part. The cut-off portion may include a support member that is woven to form a tubular shape, and a fiber material disposed to cover the tubular side surface of the support piece. On the other hand, the fibrous material is a strip-shaped member, and a selected one of a pair of balcros, a pair of snap buttons, and a pair of hooks can be coupled to both ends in the longitudinal direction of the strip shape. The fibrous material may include at least two belt-shaped members which are belt-shaped members and are disposed apart from each other, and a strap-like member which is a strap-like member and supports the belt-shaped members by connecting them. The fibrous material may also be in the form of a mesh.

The paint sprayer of the present invention may further include a distance measuring unit for measuring the distance from the fixing unit, the blocking unit, or the connecting surface to the painting surface requiring painting, in a noncontact manner. And an alarm unit for generating an alarm when the distance to the coating surface measured by the distance measuring unit deviates from a predetermined value or range of values by a predetermined amount or more.

Meanwhile, in the paint scattering prevention device of the spray gun for painting according to the present invention, the fixing part may be slidably installed in the spray gun in a direction parallel to the spray direction. In this case, it is preferable that the distance measuring unit is provided for measuring the distance from the fixing unit, the blocking unit, or the connecting surface to the painting surface requiring painting, and the distance measuring unit measures the distance to the painting surface measured by the distance measuring unit And a driving unit for driving the driving unit.

In the paint spraying prevention device for a spray gun for painting according to the present invention, the plurality of connection fingers may be pivotably fixed to at least one of the fixing portion and the blocking portion, and may be a folding type structure or a telescopic structure. Or the connection fingers may be flexible and resilient.

According to the present invention, since the blocking portion is spaced apart from the fixing portion and only the connecting wall is present therebetween, the workability is improved since the visibility of the operator is not obstructed. Such a structure is advantageous in weight reduction at the same time, thereby reducing fatigue of an operator.

In the case of including the distance measuring unit, the alarm is informed to the operator about the distance between the spray gun and the painting surface through cooperation with the alarm generating unit, so that direct contact of the blocking unit with the painting surface can be minimized.

On the other hand, depending on the structure and characteristics of the connecting flesh, the connecting flesh can be folded or bent so that the volume can be reduced during use, storage and transportation.

It is also possible to position the blocking portion at an appropriate position depending on the viscosity characteristics of the coating material, the injection pressure, etc. by sliding the fixing portion against the nozzle of the spray gun.

1 is a perspective view showing an embodiment of a paint scattering prevention device according to the present invention together with a spray gun.
Fig. 2 is a perspective view of the embodiment of Fig. 1 and the spray gun viewed from different directions. Fig.
3 is an enlarged partial perspective view of the fixing part of the embodiment of FIG.
Figure 4 is a perspective view of another variant of the fixing part of Figure 3;
5 is an enlarged partial perspective view of the blocking portion of the embodiment of FIG.
6 is a partial perspective view showing another embodiment of the blocking portion of the paint scattering prevention device according to the present invention.
Fig. 7 is an explanatory view showing, in a cross-sectional view, the operation of the connecting body of another embodiment of the paint scattering preventing apparatus according to the present invention.
8 is a schematic view of another embodiment of the paint scattering prevention device according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a paint scattering prevention device for a paint spray gun according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are perspective views of an embodiment of a paint scattering prevention device according to the present invention.

The fixing portion 110 is detachably fixed around the nozzle 51 of the spray gun 50. The fixing part 110 may have a generally circular ring shape and may be coupled so that the upper half 111 and the lower half 112, which are semicircular in shape, may be fixed or releasable from each other. 3, the nozzle 51 is inserted between the upper half 111 and the lower half 112 and is selectively fixed by the bolt 113. However, the nozzle 51 may be selectively fixed to the nozzle 51 Any form is acceptable. 4 shows a modification of the fixing part where the upper and lower halves 111 and 112 are connected to each other by a hinge 114 at one point and the bolt 113 is connected at another point. As shown in Fig. Clips or buckles may be used in addition to the hinge 114 or the bolts 113 and any structure that can be installed detachably with respect to the nozzle 51 may be adopted to implement the fixing portion 110 .

On the other hand, it is preferable that the fixing portion 110 can slide around the nozzle of the spray gun 50 in the longitudinal direction of the nozzle, that is, along the spray direction of the paint from the nozzle. The slide movement of the fixing portion 110 is briefly illustrated as a double arrow in Fig. The sliding movement of the fixing part 110 allows the distance from the end of the nozzle 51 to the blocking part 120 to be adjusted so that the characteristics such as the viscosity of the sprayed paint and the cone of the sprayed paint, So that the blocking portion 120 can be adjusted to a proper position.

The blocking portion 120 is spaced apart from the fixing portion 110. The spacing direction is a direction in which the spray gun 50 ejects the paint. In other words, the blocking portion 120, as compared with the fixing portion 110, As shown in FIG. The blocking portion 120 has a hollow cylindrical shape. The cylindrical shape as used herein includes not only a cylinder having a circular or polygonal cross section such as a cylinder, a triangular cylinder, a rectangular cylinder, or the like, but also a combination of these or another cylinder having a cross- Shape. 1, 2, and 5, the cut-off portion 120 is illustrated as a hollow cylindrical shape. The cut-off portion 120 includes a hollow cylindrical support piece 121 having both open upper and lower surfaces, And a fiber material 122 surrounded by a portion corresponding to a side surface which is a curved surface of a cylindrical shape. The fiber material 122 is provided as a member in the form of a main band, and a pair of a pair of velcro, a pair of snap buttons or a pair of hook buttons are arranged at both ends of the band shape, . FIG. 5 shows an example in which the pair of velcro strips 122a and 122b is applied. The fiber material 122 can easily be engaged or disengaged while surrounding the support piece 121 through the action of the velcro, the snap button, and the hooked button. The fibrous material 122 serves to substantially block the paint scattered in accordance with the use of the spray gun 50. Since the paint particles adhere to each other depending on the use time, the fibrous material 122 needs to be replaced. Velcro, snap buttons and hook-and-loop buttons facilitate the exchange. Meanwhile, the fibrous material 122 may be mesh-shaped so as to effectively block scattered paint particles.

6 is a partial perspective view showing another embodiment of the blocking portion shown in Fig. Also in this case, the cut-off part 120 is made up of the supporting piece 121 and the fiber material 122 '. The fibrous material 122 'may have a plurality of band-shaped portions 124 spaced apart from each other in a continuous manner, and a plurality of band-shaped portions 123 ). 6, three band-shaped portions 124 are exemplified. In this case, since the pair of band-shaped portions 124 are connected to each other by the pair of the velcro strips 122a and 122b, The band-shaped portion 124 may be disposed in two portions around the flesh 121, and the rod-like portion 123 may be disposed on the two portions. Of course, the length and the number of each of the strip-shaped portion 124 and the string-shaped portion 123 can be increased or decreased as needed. Here, the band-shaped portion 124 can block the sprayed paint particles, but the sticky portion 123 may have such a blocking effect. However, in the case where the painting surface is a vertical wall surface, for example, the paint splashing in the left and right direction is mainly problematic from the viewpoint of the operator, and the scattering in the vertical direction is not a big problem. It can be advantageous to reduce the amount of material needed and to help secure the view.

The fixing portion 110 and the blocking portion 120 are connected to each other by a connecting piece 130. The connecting piece 130 is an elongated member having both ends fixed to the fixing part 110 and the blocking part 120 so that they can be fixed to each other. In FIGS. 1, 2 and 8, a plurality of connection fingers 130 are illustrated as being arranged in a funnel or truncated cone shape. However, if only the strength of the connection fingers 130 is sufficient, only one connection fingers may be formed, It is not always necessary to form a truncated cone, but it is sufficient that the fixing portion 110 and the blocking portion 120 can be fixed with respect to each other.

7, one end of the connecting piece 130 is coupled to the blocking portion 120 by the hinge 130b, so that the pivot 130 can be pivoted And the other end is fixed to the fixing part 110 so that a joint 130a is formed as a separate hinge in the middle of the connecting piece 130 so that the two parts of the joint 130a, The fingers 130 can be folded together. 7 illustrates that the hinge 130b is formed at the coupling portion between the blocking portion 120 and the coupling body 130 but may be formed by being transferred to the coupling portion between the fixing portion 110 and the coupling body 130 . Instead, the blocking part 120 and the connecting part 130 may be fixed in this case. The foldable structure of the connection flesh 130 is similar to the folding umbrella structure and can be easily constructed by those skilled in the art. Further, the joint 130a may be biased in such a manner that the relative positions of the two parts of the connecting piece 130 divided by the joint 130a through the spring 130a are in a specific posture, for example, in a straight line have. The specific configuration in which the joint 130a is biased by a spring in a specific posture or at a specific rotation angle is well known, and thus a detailed description thereof will be omitted.

The connecting piece 130 may have a telescopic structure in addition to the folding type structure as described above. For example, although not shown, a plurality of pipe members of different diameters are sequentially inserted into the connecting piece 130, and when the connecting piece 130 is pulled by an external force, the connecting piece 130 is slid as it is pulled out, thereby increasing the overall length. In this case, the length of the connecting piece 130 can be adjusted as needed, and the size of the coating material scattering prevention device during storage and transportation can be reduced. If necessary, the connecting piece 130 may be made by applying a combination of the above-described folding type structure and the telescopic structure.

The connecting piece 130 can also be made of plastic, preferably a flexible, resilient plastic. This is effective in preventing damage due to external force during use, storage, or transportation, and it can be applied to the blocking part 120 without any structure such as the hinge 130b or the joint 130a illustrated in FIG. 7, So that the overall volume can be reduced. Of course, in this case, one connecting piece 130 may be bent at least two or more places.

FIG. 8 shows another embodiment of the paint scattering prevention device according to the present invention, wherein the configurations shown in FIG. 8 are not significantly different from the embodiments of FIGS. 1 to 7 described above. However, in the embodiment of FIG. 8, the paint scattering prevention device may further include a distance measuring unit, which directly or indirectly measures the distance D from the painting surface to the blocking unit 120. [ The distance measuring part may include a laser sensor or an ultrasonic sensor as a distance measuring element, which are non-contact sensors capable of measuring the distance to the measuring object without physical contact with the measuring object. For example, if the distance measuring element is disposed at the end of the blocking portion 120 facing the coating surface, the distance measuring portion can directly measure the distance D between the coating surface and the blocking portion 120. Alternatively, the distance measuring part may be provided at a part other than the end of the blocking part 120, or at the connecting part 130 or the fixing part 110. Further, it may be provided as a component independent of the paint scattering prevention device according to the present invention and installed in the spray gun 50. In any case, the distance measuring part can help to keep the operator at the proper distance by measuring the distance between the distance measuring element and the painting surface and displaying the measured distance. More intuitively, it is preferable that the distance measuring unit further includes an alarm unit for monitoring whether the measured value deviates from a predetermined value or a predetermined range, and issuing an alarm when the measured value deviates. The alarm unit generates an audible alarm such as a sound or a visual alarm such as light when the distance measured by the distance measuring unit exceeds a predetermined value or range beyond a predetermined size, So that it is possible to more intuitively maintain the distance between them.

As described above, if the fixing portion 110 is provided so as to be slidable with respect to the nozzle 51, the measurement result of the distance measuring portion can be utilized for other purposes. For example, if the fixing unit 110 is provided with driving means for sliding the fixing unit 110 relative to the nozzle 51 and the driving unit automatically slides the fixing unit 110 according to the measurement result of the distance measuring unit, The distance between the coating surface and the blocking portion 120 can be adjusted automatically. At this time, the driving means for sliding the fixing portion 110 may be constituted by a pneumatic double acting cylinder using the compressed air supplied to the spray gun 50 as a power source.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

Claims (11)

A fixing part detachably fixed to the nozzle of the spray gun for painting,
A blocking part in the form of a hollow cylinder arranged to be spaced from the fixing part in the spraying direction of the spray gun,
And a connection fence extending between the fixing portion and the blocking portion to support the blocking portion against the fixing portion.
The method according to claim 1,
Wherein the cut-off portion comprises: a support body which is woven so as to form a hollow cylindrical shape having an upper surface and a lower surface opened;
And a fibrous material disposed so as to cover the tubular side surface of the support piece.
3. The method of claim 2,
Wherein the fibrous material is a belt-like member, and a selected one of a pair of a velcro, a pair of snap buttons, and a pair of hooked buttons is coupled to both ends in the longitudinal direction of the strip shape.
The method of claim 3,
Wherein the fibrous material comprises at least two strip-shaped members which are strip-shaped members and are spaced apart from each other, and a strap-like upper portion which is a strap-like member and which connects and supports the strip-shaped portions to each other.
3. The method of claim 2,
Wherein the fibrous material is in the form of a mesh.
The method according to claim 1,
And a distance measurement unit for measuring in a non-contact manner the distance from the fixing unit, the blocking unit, or the connection surface to the painting surface requiring painting.
The method according to claim 6,
Further comprising an alarm unit for generating an alarm when a distance from the distance measurement unit to the coating surface is deviated from a predetermined value or range of values by a predetermined amount or more.
The method according to claim 1,
Wherein the fixing portion is slidably mounted on the spray gun in a direction parallel to the spraying direction.
9. The method of claim 8,
A distance measuring unit for non-contactly measuring a distance to the painting surface, which is provided at the fixing portion, the blocking portion,
And a driving unit for slidingly driving the fixing unit according to a distance to the coating surface measured by the distance measuring unit.
The method according to claim 1,
Wherein the plurality of connection fingers are pivotally fixed to at least one of the fixing portion and the blocking portion, and wherein the coating splash prevention device is of a folding type structure or a telescopic structure.
The method according to claim 1,
The apparatus according to any one of claims 1 to 3, wherein the connecting body is flexible and resilient.

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