Painting apparatus

Abstract

A painting apparatus according to an embodiment of the present invention may include: a spray head including a first inner flow channel and a spray hole connected to the first inner flow channel; a valve unit for opening or closing the spray hole; a spray pressure adjustment unit including a paint accommodation space which is connected to the first inner flow channel, and accommodating a predetermined amount of paint in the paint accommodation space, to adjust the pressure of the paint sprayed when the spray hole is open; a pressure setting unit for pressing the spray pressure adjustment unit; and a supply unit for supplying paint to the paint accommodation space.

Description

Painting device

[0001] The present invention relates to a painting device.

[0002]

[0003] A painting device for painting objects such as ships and materials may have a form that sprays high-viscosity paint onto the object to be painted.

[0004] The painting device can spray high-viscosity paint at high pressure and can include a spray gun including a spray nozzle or nozzle.

[0005] A spray gun can control whether paint is sprayed, how much paint is sprayed, etc. by opening or closing the spray nozzle or nozzle.

[0006] Typically, paint can be sprayed at its highest pressure when the spray gun begins spraying. This is because the internal pressure of the spray gun increases while the spray nozzle or nozzle is closed. The spray gun only sprays paint at the appropriate pressure after a certain amount of time has passed since the spray gun began spraying, lowering the spray pressure.

[0007] Due to the nature of these spray guns, it may be difficult to spray the paint at a constant and uniform pressure.

[0008] Additionally, the painting quality may become uneven depending on the worker's work skills.

[0009]

[0010] In order to solve at least some of the above problems, the present invention aims to enable a painting device to spray paint at a constant and uniform pressure.

[0011] In addition, the present invention aims to improve the efficiency of painting work and painting quality.

[0012] The purpose of the present invention is not limited to the purposes mentioned above, and other purposes not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0013]

[0014] In order to achieve the above object, a painting device according to one embodiment of the present invention may include: a spray head including a first internal passage and a spray port connected to the first internal passage; a valve unit for opening or closing the spray port; a spray pressure control unit including a paint receiving space connected to the first internal passage and accommodating a certain amount of paint in the paint receiving space to control the pressure of the paint sprayed when the spray port is opened; a pressure setting unit for pressurizing the spray pressure control unit; and a supply unit for supplying paint to the paint receiving space.

[0015] The above-mentioned injection pressure control unit may include a chamber having the paint receiving space and an inlet communicating with the paint receiving space; a support member including a second internal flow path connected to the inlet and the supply unit and a control space isolated from the second internal flow path; a control rod having one side disposed in the paint receiving space and the other side disposed in the control space; and a first elastic support member disposed in the control space and facing the other side of the control rod.

[0016] One side of the above-mentioned control rod may include a region whose width exceeds the width of the inlet, and the other side of the above-mentioned control rod may include a region whose width exceeds the width of the above-mentioned control space.

[0017] It may further include a stopper member arranged in the above-mentioned control space and contacting the other side of the control rod to limit movement of the control rod.

[0018] The first elastic support member may include a first elastic member having one side in contact with or facing the other side of the control rod and the other side facing the pressure setting member.

[0019] The above pressure setting unit may include a dial member coupled to the support member to pressurize the first elastic support member in the control space.

[0020] The above dial member may include screw threads on an outer surface, and the support member may include screw grooves corresponding to the screw threads.

[0021] The valve part may include a handle member exposed to the outside of the injection head; a packing member provided in the first internal passage and hinge-coupled to the handle member; and an opening / closing member provided in the first internal passage, connected to the packing member, and facing the injection port.

[0022] The above valve part may further include a second elastic support part that elastically supports the opening / closing member.

[0023] The second elastic support member may include a second elastic member that contacts the opening / closing member; and a valve support member that accommodates the second elastic member.

[0024] The above supply unit may include a supply line connected to the support member; and a supply pump connected to the supply line.

[0025]

[0026] The painting device according to the present invention can spray paint at a constant and uniform pressure.

[0027] In addition, the painting device according to the present invention can improve the efficiency and quality of painting work.

[0028] The effects of the present invention are not limited to those described above, and other effects not mentioned will be clearly recognized by those skilled in the art from the description below.

[0029]

[0030] Figure 1 is a schematic diagram of a painting device according to one embodiment of the present invention.

[0031] Figure 2 schematically illustrates a state in which paint is supplied inside a painting device according to one embodiment of the present invention.

[0032] Figure 3 schematically illustrates a state in which paint is sprayed in the painting device illustrated in Figure 2.

[0033] FIG. 4 is a cross-sectional view of a portion of a painting device according to another embodiment of the present invention.

[0034] Fig. 5 is a cross-sectional view of the dial member in the painting device of Fig. 4 in a manipulated state.

[0035]

[0036] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0037] While terms such as "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component." The term "and / or" includes any combination of multiple related items described herein or any one of multiple related items described herein.

[0038] The terms "~bu, ~part, ~section, etc." may be used to describe various components, but the components should not be limited by the terms. The terms may refer not only to components that are physically / visibly distinct, but also to terms that describe the function or composition of a part even if the distinction / division is not clearly defined.

[0039] The terminology used in this application is solely for the purpose of describing specific embodiments and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "comprise" or "have" indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification.

[0040] In this application, the terms “include” or “have” should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0041] Additionally, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0042] Additionally, although terms such as first and second may be used to describe various components, these components are not limited in order, size, location, or importance by terms such as first and second, and are named only for the purpose of distinguishing one component from another.

[0043] Hereinafter, with reference to the attached drawings, a preferred embodiment of the present invention will be described in more detail.

[0044]

[0045] The X-axis illustrated in the attached drawing is the depth or length direction of the nozzle (112), and the Y-axis is the diameter or width direction of the nozzle (112). However, this is a direction arbitrarily set for convenience of explanation, and the aforementioned directions may be changed.

[0046]

[0047] Fig. 1 is a schematic diagram of a painting device according to one embodiment of the present invention. In Fig. 1, the spray head (110), valve unit (120), spray pressure control unit (130), and pressure setting unit (140) are illustrated in cross section.

[0048] As shown in FIG. 1, a painting device according to one embodiment of the present invention may include a spray head (110) including a first internal flow path (111) and a spray port (112) connected to the first internal flow path (111), a valve unit (120) for opening or closing the spray port (112), a paint receiving space (131a) connected to the first internal flow path (111), a spray pressure control unit (130) for receiving a certain amount of paint in the paint receiving space (131a) and controlling the pressure of the paint sprayed when the spray port (112) is opened, a pressure setting unit (140) for pressurizing the spray pressure control unit (130), and a supply unit (150) for supplying paint to the paint receiving space (131a).

[0049] The injection head (110) may include a injection port (112) connected to the exterior of the injection head (110). The injection port (112) may be connected to a first internal flow path (111) provided within the injection head (110). The first internal flow path (111) may include a plurality of flow paths.

[0050] The paint can flow in the first internal passage (111), and the paint can be accommodated in the first internal passage (111) for a certain period of time.

[0051] A valve part (120) may be provided in one of the plurality of flow paths extending in the X-axis direction. One of the flow paths extending in the X-axis direction may be connected to the injection port (112).

[0052] The plurality of flow paths may include another flow path inclined with respect to the X-axis and another flow path extending in the Y-axis direction. Any one of the other flow paths inclined with respect to the X-axis may be connected to any one of the other flow paths extending in the Y-axis direction and any one of the flow paths extending in the X-axis direction. However, this is according to one embodiment of the first internal flow path (111), and the internal arrangement of the plurality of flow paths may be appropriately changed and applied depending on the specifications of the object to be painted, the painting environment, etc.

[0053] In one embodiment of the present invention, the injection pressure control unit (130) may include a chamber (131) having a paint receiving space (131a) and an inlet (131b) communicating with the paint receiving space (131a), a support member (132) including a second internal flow path (132a) connected to the inlet (131b) and the supply unit (150) and a control space (132b) isolated from the second internal flow path (132a), a control rod (133) having one side disposed in the paint receiving space (131a) and the other side disposed in the control space (132b), and a first elastic support member (134) disposed in the control space (132b) and facing the other side of the control rod (133).

[0054] The chamber (131) can be connected to the lower part of the -Y direction of the spray head (110). The chamber (131) can be connected to the spray head (110) by welding or by a connecting member such as a bolt.

[0055] The chamber (131) may have a paint receiving space (131a) having a certain volume therein. One area of ​​the paint receiving space (131a) may be connected to the first internal flow path (111), and the connection between the first internal flow path (111) and the paint receiving space (131a) may be sealed.

[0056] An inlet (131b) may be provided on the other side of the paint receiving space (131a). The inlet (131b) may be a through hole formed in the chamber (131). The inlet (131b) may connect the paint receiving space (131a) to the outside of the chamber (131).

[0057] The other side region of the chamber (131) may be connected to the support member (132). In one embodiment, at least a portion of the chamber (131), including the other side region of the chamber (131), may be inserted into the support member (132).

[0058] The support member (132) can be connected to the lower part of the spray head (110) in the -Y direction. The support member (132) can be connected to the spray head (110) by welding or by a connecting member such as a bolt.

[0059] The support member (132) may be extended by a certain length in the Y-axis direction, and a second internal flow path (132a) may be provided inside the support member (132). Paint may flow through the second internal flow path (132a) or paint may be accommodated for a certain period of time.

[0060] The second internal flow path (132a) may be formed within the support member (132) and may include a plurality of flow paths. The plurality of flow paths may include one flow path extending in the Y-axis direction. One of the flow paths extending in the Y-axis direction may be connected to the inlet (131b) of the chamber (131).

[0061] The plurality of euros may include another euro inclined with respect to the Y-axis. The other euro inclined with respect to the Y-axis may be connected to any one of the euros extending in the Y-axis direction.

[0062] Another channel inclined with respect to the Y-axis may have a form branched from one of the channels extending in the Y-axis direction and may be connected to a supply unit (150). The supply unit (150) may inject paint into another channel inclined with respect to the Y-axis. A detailed description of the supply unit (150) will be provided later.

[0063] The support member (132) may include an adjustment space (132b) isolated from the second internal flow path (132a). The adjustment space (132b) is formed inside the support member (132) and may be isolated from any one of the second internal flow paths (132a) extending in the Y-axis direction by a stopper member (135).

[0064] In one embodiment, the control space (132b) may be positioned at the lower portion in the -Y direction of one of the flow paths extending in the Y-axis direction.

[0065] The stopper member (135) extends a certain length in the Y-axis direction, and at least a portion of the adjustment rod (133) can pass through the inside thereof.

[0066] For example, the width or diameter of the stopper member (135) in the X-axis direction may exceed the width or diameter of the second internal flow path (132a) in the X-axis direction.

[0067] The stopper member (135) is fixed to the inner surface of the support member (132) and can prevent paint existing in the second internal passage (132a) from flowing into the interior of the control space (132b).

[0068] In one embodiment, the stopper member (135) may be made of a material including rubber or the like, but this is not necessarily limited by the present invention.

[0069] The end of the stopper member (135) in the +Y direction can face the second internal flow path (132a), and the end of the stopper member (135) in the -Y direction can face the adjustment space (132b) or be introduced into the adjustment space (132b).

[0070] The end of the stopper member (135) in the -Y direction may protrude in a direction toward the adjustment space (132b), and at least a portion of the area including the end of the stopper member (135) in the -Y direction may be located inside the adjustment space (132b).

[0071] The control rod (133) can be introduced into the chamber (131) at one end (133a) including an end in the +Y direction, and the other end (133b) including an end in the -Y direction can be introduced into the control space (132b).

[0072] The control rod (133) may have one side (133a) spaced from the chamber (131) so that the inlet (131b) of the chamber (131) is always kept open in its basic state.

[0073] The adjustment rod (133) may have a beam or rod shape that extends a certain length in the Y-axis direction. The adjustment rod (133) may penetrate the stopper member (135) and be supported by the stopper member (135). To this end, the stopper member (135) may include a hollow portion through which the adjustment rod (133) passes, and the adjustment rod (133) may be inserted into the hollow portion.

[0074] In one embodiment, the width or diameter of the adjustment rod (133) in the X-axis direction and the width or diameter of the hollow portion of the stopper member (135) in the X-axis direction may have a fit tolerance between the shaft and the hole. For example, the fit tolerance may be a loose fit tolerance or an intermediate fit tolerance. Accordingly, the adjustment rod (133) can be easily moved in the Y-axis direction even when inserted into the hollow portion of the stopper member (135).

[0075] Additionally, in one embodiment, a friction reducing member may be further provided between the outer surface of the adjusting rod (133) and the inner surface of the stopper member (135) facing the outer surface of the adjusting rod (133). However, this is not necessarily limited by the present invention.

[0076] The diameter or width of one side (133a) of the adjustment rod (133) in the X-axis direction may exceed the diameter or width of the inlet (131b) in the X-axis direction. Accordingly, one side (133a) of the adjustment rod (133) may be prevented from being dislodged outside the chamber (131).

[0077] The diameter or width in the X-axis direction of the other side (133b) of the adjustment rod (133) may be less than or equal to the diameter or width in the X-axis direction of the adjustment space (132b), but may exceed the diameter or width in the X-axis direction of the second internal flow path (132a). Accordingly, the other side (133b) of the adjustment rod (133) may be prevented from being separated from the adjustment space (132b).

[0078] In one embodiment, the diameter or width in the X-axis direction of the other side (133b) of the adjustment rod (133) may exceed the diameter or width in the X-axis direction of the -Y-direction end of the stopper member (135) located in the adjustment space (132b). Accordingly, the movement of the other side (133b) of the adjustment rod (133) in the +Y direction may be restricted by the other side (133b) of the adjustment rod (133) coming into contact with the -Y-direction end of the stopper member (135) inside the adjustment space (132b).

[0079] Additionally, in one embodiment, one side (133a) of the adjustment rod (133) may include a region whose diameter or width in the X-axis direction exceeds the diameter or width of the inlet (131b) of the chamber (131) in the X-axis direction, and the other side (133b) of the adjustment rod (133) may include a region whose diameter or width in the X-axis direction exceeds the diameter or width of the adjustment space (132b) in the X-axis direction. Accordingly, the adjustment rod (133) may be prevented from being separated from the paint receiving space (131a) and the adjustment space (132b).

[0080] The first elastic support member (134) may include a first elastic member (134a) having one side in contact with or facing the other side of the adjustment rod (133) and the other side facing the pressure setting member (140).

[0081] One side of the first elastic member (134a) may be an end of the first elastic member (134a) in the +Y direction, and the other side of the first elastic member (134a) may be an end of the first elastic member (134a) in the -Y direction.

[0082] One side of the first elastic member (134a) can contact or face the other side (133b) of the adjusting rod (133), and the other side of the first elastic member (134a) can contact or face the pressure setting part (140).

[0083] Meanwhile, in one embodiment of the present invention, the support member (132) may further include an auxiliary support block (132c). The auxiliary support block (132c) may include a space therein in which a first elastic member (134a) and a pressure setting unit (140) are accommodated, and the auxiliary support block (132c) may be fixed by being coupled to one side of the support member (132). The auxiliary support block (132c) may be fixed to the support member (132) by using a joining member such as welding, adhesive, or bolts, but the fixing method is not necessarily limited by the present invention.

[0084] However, this is according to one embodiment of the present invention, and the support member (132) may be provided as an integral part. In this case, the first elastic member (134a) and the pressure setting unit (140) may be accommodated in the support member (132), and the first elastic member (134a) and the pressure setting unit (140) may be supported by the support member (132).

[0085] Below, an embodiment in which the first elastic member (134a) and the pressure setting unit (140) are supported by an auxiliary support block (132c) will be described.

[0086] The first elastic member (134a) may be a spring whose length is contracted or extended in the Y-axis direction. The type and elastic coefficient of the spring are not necessarily limited by the present invention.

[0087] The first elastic member (134a) can be interposed between the other side (133b) of the adjustment rod (133) and the pressure setting portion (140), and can be compressed by the other side (133b) of the adjustment rod (133) and the pressure setting portion (140) to cause its length to contract in the Y-axis direction.

[0088] The end of the first elastic member (134a) in the -Y direction may be placed on the upper part of the pressure setting member (140) in the +Y direction, and the end of the first elastic member (134a) in the +Y direction may be in contact with the other side (133b) of the adjustment rod (133).

[0089] The first elastic member (134a) can be compressed by the paint present in the second internal flow path (132a) and the paint receiving space (131a). In one embodiment, when a certain amount of fluid, i.e., paint, is filled in the second internal flow path (132a) and the paint receiving space (131a), the adjusting rod (133) can move in the -Y direction.

[0090] At this time, the first elastic member (134a) may be compressed and its length in the Y-axis direction may be contracted. The point in time at which the length of the first elastic member (134a) is contracted may be controlled by adjusting the elastic coefficient of the first elastic member (134a).

[0091] For example, if it is desired to shrink the first elastic member (134a) with a relatively small amount of paint, a first elastic member (134a) with a relatively small elastic modulus may be applied, and if it is desired to shrink the first elastic member (134a) with a relatively large amount of paint, a first elastic member (134a) with a relatively large elastic modulus may be applied. In addition, if it is desired to shrink the first elastic member (134a) with a relatively low pressure paint, a first elastic member (134a) with a relatively small elastic modulus may be applied, and if it is desired to shrink the first elastic member (134a) with a relatively high pressure paint, a first elastic member (134a) with a relatively large elastic modulus may be applied.

[0092] The pressure setting unit (140) may include a dial member (141) coupled to the support member (132) to pressurize the first elastic support member (134) in the control space (132b).

[0093] The dial member (141) can contact or face the first elastic support member (134) inside the support member (132). The dial member (141) can be coupled to the support member (132) so that the state of coupling with the support member (132) can be changed.

[0094] In one embodiment, the dial member (141) can be coupled to the auxiliary support block (132c) of the support member (132). The end of the dial member (141) in the +Y direction can be inserted into the adjustment space (132b), and can come into contact with or face the first elastic member (134a) in the adjustment space (132b).

[0095] The end of the dial member (141) in the -Y direction can be exposed to the outside of the auxiliary support block (132c). The dial member (141) can be manipulated by a worker from the outside of the auxiliary support block (132c).

[0096] The dial member (141) can be provided so that the length introduced into the adjustment space (132b) can be changed by the operator, and can be maintained in the changed state after the length introduced into the adjustment space (132b) has been changed.

[0097] For example, in a state where no paint exists in the paint receiving space (131a) and the second internal flow path (132a), as the length of the dial member (141) inserted into the control space (132b) increases, the compressive force of the first elastic member (134a) in the Y-axis direction increases, and the length of the first elastic member (134a) in the Y-axis direction can be shortened.

[0098] Conversely, as the length of the dial member (141) inserted into the adjustment space (132b) is reduced, the compressive force of the first elastic member (134a) in the Y-axis direction decreases, and the length of the first elastic member (134a) in the Y-axis direction can be increased. Using this principle, the operator can adjust the length of the dial member (141) inserted into the adjustment space (132b), and can adjust the length of the first elastic member (134a) in the Y-axis direction in a state where no paint exists in the paint receiving space (131a) and the second internal passage (132a).

[0099] According to this, the intensity of the compressive force applied to the control rod (133) in the +Y direction can be controlled by the first elastic member (134a).

[0100] Meanwhile, the supply unit (150) may include a supply line (151) connected to the support member (132) and a supply pump (152) connected to the supply line (151).

[0101] The supply line (151) may be connected to the second internal flow path (132a) of the support member (132). The supply line (151) may be a flow path for paint supplied from a paint storage tank. In one embodiment, the supply line (151) may be a flexible hose.

[0102] A supply pump (152) may be connected to the supply line (151), and the supply pump (152) may be a high-pressure paint pump. The supply pump (152) may contribute to supplying paint at a constant pressure. For example, the supply pump (152) may supply paint at a pressure of 400 bar.

[0103] In one embodiment, the supply line (151) is equipped with a supply control valve to control whether paint is supplied, the flow rate, etc.

[0104] Within the range in which the supply control valve allows the paint to be supplied, the paint can be supplied at high pressure and introduced into the second internal passage (132a). When the paint fills the second internal passage (132a), the paint receiving space (131a) of the chamber (131), and the first internal passage (111) of the spray head (110), the operator can control the supply control valve to block further supply of the paint.

[0105] To this end, a pressure sensor, a flow sensor, etc. may be further provided in at least one of the second internal flow path (132a), the paint receiving space (131a) of the chamber (131), the first internal flow path (111) of the spray head (110), and the supply line (151). However, this is not necessarily limited by the present invention.

[0106] Meanwhile, the valve part (120) may include a handle member (121) exposed to the outside of the injection head (110), a packing member (125) provided in the first internal passage (111) and hinged (122) to the handle member (121), and an opening / closing member (123) provided in the first internal passage (111), connected to the packing member (125), and facing the injection port (112).

[0107] In one embodiment, the first internal flow path may have a narrower width or diameter in the Y-axis direction as it approaches the nozzle (112). The first internal flow path (111) may include a point in an area adjacent to the nozzle (112) that has the same width as the width of the nozzle (112) in the Y-axis direction.

[0108] The opening / closing member (123) can face or contact a point having the same width as the Y-axis direction width of the injection port (112) in the first internal flow path (111).

[0109] The opening / closing member (123) may have a certain length in the X-axis direction. In addition, the opening / closing member (123) may include a section in which the width in the Y-axis direction exceeds the width of a point in the first internal passage (111) that has the same width as the width of the spray port (112) in the Y-axis direction. Accordingly, the opening / closing member (123) can easily seal the spray port (112). When the opening / closing member (123) is in close contact with the spray head (110) in the first internal passage (111), the external discharge of paint through the spray port (112) may be restricted.

[0110] The first internal passage (111) is provided with a packing member (125), and the opening / closing member (123) can penetrate the packing member (125) and come into contact with the second elastic support member (124).

[0111] The packing member (125) can be connected to the handle member (121) exposed to the outside of the injection head (110) by a hinge (122), and can be moved in the X-axis direction in the first internal flow path (111) by the worker moving the handle member (121). However, the driving method of the packing member (125) is not limited to this, and the packing member (125) may be fixed and not move.

[0112] In one embodiment, a friction reducing member may be further provided between the outer surface of the packing member (125) and the inner surface of the injection head (110) to facilitate movement of the packing member (125), but this is not necessarily limited by the present invention.

[0113] The packing member (125) can be in close contact with the inner surface of the spray head (110) in the first internal passage (111) to prevent the paint contained in the first internal passage (111) from flowing out toward the second elastic support member (124).

[0114] The end of the opening / closing member (123) penetrating the packing member (125) may face or contact the second elastic support member (124). The opening / closing member (123) may be fixed to the packing member (125) and may be moved by the movement of the packing member (125). However, the opening / closing member (123) may be moved independently of the packing member (125).

[0115] The second elastic support member (124) can be coupled to one side of the spray head (110) and can elastically support the opening / closing member (123) by facing or contacting the opening / closing member (123) inside the spray head (110).

[0116]

[0117] Figure 2 schematically illustrates a state in which paint is supplied inside a painting device according to one embodiment of the present invention.

[0118] As shown in Fig. 2, the second elastic support member (124) described above may include a second elastic member (124a) that comes into contact with the opening / closing member (123) and a valve support member (124b) (124b) that accommodates the second elastic member (124a).

[0119] The valve support member (124b) (124b) may include a support space (124ba) therein and may be fixedly coupled to the injection head (110).

[0120] A second elastic member (124a) is accommodated in the support space (124ba), and the second elastic member (124a) can face or contact the end of the opening / closing member (123) in the +X direction. When the worker presses the handle member (121) to move the packing member (125) in the +X direction, the opening / closing member (123) can move in the +X direction. However, even if the packing member (125) does not move, the opening / closing member (123) can move in the +X direction. Accordingly, the opening / closing member (123) can be removed from the position where it seals the injection port (112).

[0121] At this time, the second elastic member (124a) is pressed by the opening / closing member (123), and when the operator stops pressing the handle member (121), the second elastic member (124a) can move the packing member (125) in the -X direction while its length is extended in the X-axis direction by its elastic coefficient. Accordingly, the opening / closing member (123) can return to the position where it seals the injection port (112). However, even if the packing member (125) does not move, when the operator stops pressing the handle member (121), the opening / closing member (123) can return to the position where it seals the injection port (112).

[0122] Hereinafter, with reference to FIG. 2, a state in which paint is filled in the paint receiving space (131a), the first internal flow path (111), and the second internal flow path (132a) will be described.

[0123] Paint can be introduced into the second internal flow path (132a) through the supply line (151). If the supply of paint is not blocked in the supply line (151), the introduction of paint through the second internal flow path (132a) can continue.

[0124] When the paint receiving space (131a), the first internal passage (111) and the second internal passage (132a) are filled with paint, the worker can block the inflow of paint through the second internal passage (132a).

[0125] The paint can fill the paint receiving space (131a), the first internal passage (111), and the second internal passage (132a). The paint can also fill the space located between the stopper member (135) and the inlet (131b) in the second internal passage (132a).

[0126] As the paint receiving space (131a) is filled with paint, the control rod (133) can be lowered in the -Y direction by the pressure of the paint. If a friction reducing member is provided on the outer surface of the control rod (133) and the inner surface of the stopper member (135), the movement of the control rod (133) can be made easier.

[0127] As the control rod (133) descends, the first elastic member (134a) facing or in contact with the other side (133b) of the control rod (133) is compressed in the -Y direction, so that the length in the Y-axis direction can be contracted.

[0128] In one embodiment, the width (W2) of one side (133a) of the adjustment rod (133) in the X-axis direction may exceed the width (W1) of the inlet (131b) in the X-axis direction. Therefore, when the adjustment rod (133) is lowered and one side (133a) of the adjustment rod (133) comes into contact with the inlet (131b), the inlet (131b) may be sealed. At this time, further inflow of paint into the paint receiving space (131a) may be stopped.

[0129] Additionally, in one embodiment, the other side (133b) of the adjustment rod (133) may include a step portion (133ba). The step portion (133ba) may be formed by extending the other side (133b) of the adjustment rod (133) in the X-axis direction. The width or diameter of the step portion (133ba) in the X-axis direction may exceed the width or diameter of one side (133a) of the adjustment rod (133) in the X-axis direction.

[0130] In addition, the width or diameter of the step portion (133ba) in the X-axis direction may be less than or equal to the width or diameter of the adjustment space (132b) in the X-axis direction. Accordingly, the other side (133b) of the adjustment rod (133) can be prevented from being separated from the adjustment space (132b), and contact between the stopper member (135) and the other side (133b) of the adjustment rod (133) can be facilitated.

[0131] The painting device can maintain a state as shown in Fig. 2 until the worker presses the handle member (121). Until the worker presses the handle member (121), the opening / closing member (123) can maintain the spray port (112) in a sealed state. Accordingly, the discharge of paint through the spray port (112) can be restricted.

[0132] Since the paint maintains the paint receiving space (131a), the first internal flow path (111), and the second internal flow path (132a) filled until just before being discharged through the nozzle (112), a certain level of high pressure can be maintained until just before being discharged.

[0133]

[0134] Figure 3 schematically illustrates a state in which paint is sprayed in the painting device illustrated in Figure 2.

[0135] As shown in Fig. 3, when the worker presses the handle member (121), the packing member (125) can move in the -X direction. Accordingly, the contact between the end of the opening / closing member (123) in the -X direction and the spray head (110) can be released. However, even if the packing member (125) does not move, when the worker presses the handle member (121), the contact between the end of the opening / closing member (123) in the -X direction and the spray head (110) can be released. Accordingly, the first internal flow path (111) and the spray port (112) are connected, and the paint can be discharged through the spray port (112). At this time, the second elastic member (124a) can be pressed by the opening / closing member (123) to shrink in length in the X-axis direction. While the worker is pressurizing the handle member (121), the open state of the nozzle (112) is maintained, and the contracted state of the second elastic member (124a) can also be maintained.

[0136] When the nozzle (112) is opened, the paint can be discharged at high pressure. This can be achieved by maintaining the paint in a state where the first internal passage (111), the paint receiving space (131a), and the second internal passage (132a) are fully filled even when the nozzle (112) is closed.

[0137] This allows the operator to supply paint at high pressure from the moment the spraying process begins. This allows for consistent, high-pressure spraying regardless of the operator's skill level. Consequently, paint quality can be maintained consistently regardless of the operator, leading to improved paint quality.

[0138] As the amount of paint contained in the first internal passage (111), the paint receiving space (131a), and the second internal passage (132a) decreases, the pressure caused by the paint in the first internal passage (111), the paint receiving space (131a), and the second internal passage (132a) may decrease.

[0139] When the pressure of the first internal passage (111), the paint receiving space (131a), and the second internal passage (132a) decreases below a certain level, the control rod (133) can move upward in the +Y direction. Then, the contact between one side (133a) of the control rod (133) and the chamber (131) can be released. Accordingly, the inlet (131b) can be opened.

[0140] At this time, if the paint supply continues through the supply line (151), the pressure caused by the paint can be increased in the first internal flow path (111), the paint receiving space (131a), and the second internal flow path (132a). Thereafter, when the pressure caused by the paint in the first internal flow path (111), the paint receiving space (131a), and the second internal flow path (132a) reaches a certain level or higher, the control rod (133) can be lowered in the -Y direction again to contact the chamber (131). Therefore, the inlet (131b) can be sealed again.

[0141] By this principle, the painting device can maintain a high pressure state of the paint. Accordingly, the pressure of the paint discharged through the nozzle (112) can be maintained at a constant high pressure.

[0142]

[0143] Meanwhile, Fig. 4 is a cross-sectional view of a portion of a painting device according to another embodiment of the present invention. As shown in Fig. 4, in another embodiment of the present invention, a screw thread (141a) may be provided on the outer surface of the dial member (141), and the support member (132) may include a screw groove (132d) corresponding to the inner screw thread.

[0144] The screw thread (141a) can be engaged with the screw groove (132d), and the screw thread (141a) and the screw groove (132d) can be provided at the joint of the support member (132) and the dial member (141).

[0145] Accordingly, when the operator rotates the dial member (141), the manipulation of the dial member (141) can be made easier by the screw groove (132d) and the screw thread (141a). In addition, since the combination of the dial member (141) and the support member (132) can be maintained by the screw combination, the combination of the dial member (141) and the support member (132) can be made more solid.

[0146] However, this is an example of the present invention, and the screw thread (141a) and screw groove (132d) may be replaced with other components.

[0147] As shown in Fig. 4, the length of the first elastic member (134a) in the Y-axis direction when the dial member (141) is in contact with the bottom surface of the support block in the -Y direction inside the control space (132b) can be the first length (L1).

[0148] When the length of the first elastic member (134a) in the Y-axis direction is the first length (L1), the inlet (131b) may be in an open state, and the step portion (133ba) of the adjusting rod (133) may be in contact with the stopper member (135). The first length (L1) may be the maximum length of the first elastic member (134a).

[0149]

[0150] Fig. 5 is a cross-sectional view of the state in which the dial member (141) is operated in the painting device of Fig. 4. As shown in Fig. 5, when the inlet (131b) is open and the step portion (133ba) of the adjusting rod (133) is in contact with the stopper member (135), the worker can operate the dial member (141) to set the length of the first elastic member (134a) in the Y-axis direction to the second length (L2).

[0151] Additionally, conversely, the operator can also manipulate the dial member (141) to adjust the length of the first elastic member (134a) in the Y-axis direction from the second length (L2) to the first length (L1). This can be achieved by the elastic restoring force of the first elastic member (134a).

[0152] The dial member (141) can be moved in the +Y direction by the operator, and can be inserted deeper into the interior of the support member (132), for example, into the interior of the control space (132b). Accordingly, the end of the first elastic member (134a) in the -Y direction can be pressed by the dial member (141). Accordingly, the length of the first elastic member (134a) in the Y-axis direction can be contracted, so that the length of the first elastic member (134a) can become the second length (L2).

[0153] The second length (L2) may be shorter than the first length (L1). When the elastic modulus of the first elastic member (134a) is constant, the force with which the first elastic member (134a) presses the adjustment rod (133) when the first elastic member (134a) has the second length (L2) may be stronger than the force with which the first elastic member (134a) presses the adjustment rod (133) when the first elastic member (134a) has the first length (L1).

[0154] That is, when the first elastic member (134a) has the second length (L2), the force that presses the adjustment rod (133) in the +Y direction can be greater than the force that presses the adjustment rod (133) in the +Y direction when the first elastic member (134a) has the first length (L1).

[0155] Therefore, after the pressure caused by the paint in the paint receiving space (131a) becomes weaker than the force that causes the first elastic member (134a) to expand in the Y-axis direction, the control rod (133) can be moved upward in the +Y direction.

[0156] At this time, when the first elastic member (134a) has the second length (L2), the speed at which the adjustment rod (133) rises in the +Y direction can be faster than the speed at which the adjustment rod (133) rises in the +Y direction when the first elastic member (134a) has the first length (L1). This is because the restoring force when the first elastic member (134a) has the second length (L2) is greater than the restoring force when the first elastic member (134a) has the first length (L1). This can be achieved by adjusting the compression amount of the first elastic member (134a) through the dial member (141).

[0157] In addition, when the paint is consumed in the paint receiving space (131a) and the pressure in the paint receiving space (131a) gradually decreases, the point in time at which the control rod (133) rises in the +Y direction may be faster when the first elastic member (134a) has the second length (L2) than when the first elastic member (134a) has the first length (L1).

[0158] Also, even when the same paint exists in the paint receiving space (131a), when the first elastic member (134a) has the second length (L2), the inlet (131b) can be opened more quickly than when the first elastic member (134a) has the first length (L1).

[0159]

[0160] This may mean that the strength of the force required to pressurize the first elastic member (134a) by lowering the adjustment rod (133) in a state where the initial length of the first elastic member (134a) is the first length (L1) is weaker than the strength of the force required to pressurize the first elastic member (134a) by lowering the adjustment rod (133) in a state where the initial length of the first elastic member (134a) is the second length (L2). At this time, pressurizing the first elastic member (134a) may mean reducing the length of the first elastic member (134a) in the Y-axis direction.

[0161] Accordingly, the operator can operate the dial member (141) considering the above principle. In one embodiment, the dial member (141) can be operated before supplying paint to the second internal flow path (132a).

[0162] However, in some cases, the dial member (141) may be operated even while supplying paint to the second internal flow (132a).

[0163] According to this, the pressure of the paint discharged through the nozzle (112) can be maintained at a constant level, and the paint can be sprayed at high pressure from the start of spraying.

[0164] Therefore, the efficiency and quality of painting work can be improved, and the quality of painting can be maintained consistently.

[0165]

[0166] Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

[0167]

[0168] The present invention is useful for providing a painting device capable of spraying paint evenly.

Claims

1. A spray head including a first internal flow path and a spray port connected to the first internal flow path; A valve part that opens or closes the above nozzle; A spray pressure control unit including a paint receiving space connected to the first internal flow path, and containing a certain amount of paint in the paint receiving space to control the pressure of the paint sprayed when the spray port is opened; A pressure setting unit for pressurizing the above injection pressure control unit; and A supply unit that supplies paint to the above paint receiving space; A painting device including:

2. In paragraph 1, The above injection pressure control unit is, A chamber having the paint receiving space and an inlet connected to the paint receiving space; A support member including a second internal flow path connected to the inlet and the supply portion and a control space isolated from the second internal flow path; A control rod having one side disposed in the paint receiving space and the other side disposed in the control space; and A first elastic support member arranged in the above-mentioned control space and facing the other side of the control rod; A painting device including:

3. In paragraph 2, One side of the above control rod is, Includes an area whose width exceeds the width of the inlet, The other side of the above adjustment rod is, A painting device comprising an area whose width exceeds the width of the above-mentioned control space.

4. In paragraph 3, A stopper member arranged in the above-mentioned control space and contacting the other side of the control rod to limit movement of the control rod; A painting device further comprising:

5. In paragraph 3, The above first elastic support part is, A first elastic member having one side in contact with or facing the other side of the control rod and the other side facing the pressure setting portion; A painting device including:

6. In paragraph 2, The above pressure setting unit, A painting device comprising a dial member coupled to the support member to pressurize the first elastic support member in the above-mentioned control space.

7. In paragraph 6, The above dial member, Contains screw threads on the outer surface, The above support member is, A painting device including a screw groove corresponding to the above screw thread.

8. In paragraph 1, The above valve part, A handle member exposed to the outside of the above injection head; A packing member provided in the first internal passage and hinge-connected to the handle member; and An opening / closing member provided in the first internal passage, connected to the packing member, and facing the injection port; A painting device including:

9. In paragraph 8, The above valve part, A second elastic support member that elastically supports the above opening / closing member; A painting device further comprising:

10. In paragraph 9, The above second elastic support part is, A second elastic member in contact with the opening / closing member; and A valve support member that accommodates the second elastic member; A painting device including:

11. In paragraph 2, The above supply unit, a supply line connected to the above support member; and A supply pump connected to the above supply line; A painting device including:

Images