KR102605093B1 - An apparatus for aligning a screw, and an apparatus for coating a screw comprising the same - Google Patents

Abstract

The present invention relates to a screw alignment device. The screw alignment device includes: a first static electricity generating unit that generates static electricity of a first polarity, which is one of + electrostatic polarity and - electrostatic polarity; a second static electricity generation unit that generates static electricity of a second polarity other than the polarity of the first static electricity generation unit; a screw transfer means that is electrostatically charged to a first polarity in a non-contact state by the first static electricity generating unit and transfers the screw; and a screw introduction unit that supplies a screw that is electrostatically charged by the second static electricity generation unit.

Description

An apparatus for aligning a screw, and an apparatus for coating a screw comprising the same}

The present invention relates to a screw alignment device that aligns the screw before coating when coating is required on a specific part of the screw, especially the threaded portion of the screw, and a screw coating device including the same. More specifically, the present invention relates to a screw alignment device that aligns the screw before coating it, and more specifically, to a screw coating device that includes the same. This relates to a screw alignment device for aligning a transfer device and a screw coating device including the same.

Typically, screws are used to fasten mechanical or electronic components. As shown in Figure 1, the screw (S) includes a head (S1) and a threaded portion (S2) disposed below the head (S1). In the case of screws used in electronic devices, coating is sometimes applied to the screw portion to control electrical conductivity or control the fixation strength of the screw portion.

In the case of a screw whose threaded portion is to be coated, the threaded portion must be aligned during the coating process and the coating liquid must be supplied to the aligned threaded portion. However, manually aligning individual screws that are coated in large quantities in a certain direction takes a lot of time and causes many alignment errors.

Furthermore, when the screw itself is made of a non-magnetic material, there is a problem in that it is not easy to align the continuously supplied screws in a certain direction in order to coat the screw.

In order to solve the problems of the prior art described above, the purpose of the present invention is to provide a device for aligning screw heads using static electricity and coating the screws aligned by such an alignment device.

The purpose of the present invention is to provide a device for aligning continuously supplied, particularly non-magnetic, screws in a certain direction and coating these aligned screws.

The purpose of the present invention is to provide a coating device that allows the coating solution to be evenly applied to the threaded portion of the aligned screw without omission.

The purpose of the present invention is to provide a coating device that allows the screw to be attached to and transferred to a transfer means by electrostatic force during the coating process, but to be easily separated from the transfer means after coating is completed.

In order to achieve the above-described object, a screw head alignment device according to an embodiment of the present invention includes a first static electricity generator that generates static electricity of a first polarity, which is one of + electrostatic polarity and - electrostatic polarity, and the second electrostatic polarity. A static electricity generation unit comprising a second static electricity generation unit that generates static electricity of a second polarity other than the polarity generated by the first static electricity generation unit; a screw transfer means that is electrostatically charged to a first polarity by the first static electricity generator in a non-contact state with the first electrostatic charging terminal of the first static electricity generator and supports and transports the screw with an adhesion force due to static electricity; and a screw introduction unit supplying a screw electrostatically charged to a second polarity by the second static electricity generation unit.

Here, the screw supplied from the screw introduction unit is electrostatically charged to the second polarity by the second static electricity generation unit in a non-contact state with the second electrostatic charging nozzle in communication with the second static electricity generation unit.

The screw transfer means includes a transfer belt that can be charged by static electricity, and the transfer belt may be made of fluorocarbon resin.

Meanwhile, a screw alignment unit is further included to guide the head of the screw supplied through the screw introduction unit to the belt surface of the screw transport means.

The screw introduction part includes a vibration generator that provides vibration to the screw contained in the screw introduction part; a guide path portion that guides the screw to the screw alignment portion while vibrating by the vibration generating portion; and a feedback unit that collects screws that are not seated in the screw alignment unit and provides them back to the guide path unit.

The screw alignment unit includes an alignment guide rail that moves only the screws in the correct position among the screws that move along the guide path unit and move by vibration generated by the vibration generator; and a cover member spaced apart from the alignment guide rail and covering the head of the screw.

The alignment guide rail and the cover member are spaced apart from each other and twisted and curved to direct the head of the screw toward the belt surface of the screw transport means.

A screw coating device according to an embodiment of the present invention includes the above-described screw alignment device; and a release means for separating the screw from the screw transfer means after transferring the screw transferred by the screw transfer means of the screw alignment device to a predetermined transfer position.

Here, the release means includes a frame member that is attached to the screw transfer means by static electricity and disposed in the transfer path of the transported screw to separate the screw from the screw transfer means, and the frame member is insulated from static electricity.

The release means includes a release air gun that is attached to the screw transfer means by static electricity and sprays air toward the transferred screw.

The screw coating device according to an embodiment of the present invention further includes a coating portion that forms a coating surface on at least a portion of the screw transported by the screw transport means.

The coating unit includes a coating liquid supply nozzle that supplies the coating liquid to the threaded part of the screw from the upper side; and a coating liquid application wheel that supplies the coating liquid to the lower side of the threaded portion of the screw.

The screw coating device according to an embodiment of the present invention further includes a post-coating unit that dries the coating liquid after the coating has been completed, and a screw collection unit that collects the dried screw by separating it from the screw transfer means.

The screw coating device according to an embodiment of the present invention removes the electrostatic force between the electrostatically charged screw and the screw transfer means when transferring the coated screw from the screw transfer means, so that the screw can be easily separated from the screw transfer means. To this end, a static electricity removal part may be additionally included at the area where the screw should be removed.

As described above, according to the present invention, it is possible to easily coat continuously supplied screws.

In addition, according to the present invention, it is possible to provide a device for easily aligning screw heads using static electricity and coating the screws aligned by such an alignment device.

According to the present invention, it is possible to provide a device for aligning continuously supplied, particularly non-magnetic, screws in a certain direction and coating such aligned screws.

According to the present invention, it is possible to provide a coating device that allows the coating solution to be evenly applied to the threaded portion of the aligned screw without omission.

According to the present invention, it is possible to provide a coating device that allows the screw to be attached to and transferred to the transfer means by electrostatic force during the coating process, but to be easily separated from the transfer means after coating is completed.

1 is a general explanatory diagram of a screw.
Figure 2 is a schematic plan view of a screw alignment device and a screw coating device including the same according to an embodiment of the present invention.
Figure 3 is a partial enlarged view of one embodiment of A in Figure 2.
FIG. 4 is an explanatory diagram showing the posture of successively neighboring screws in the screw alignment portion of FIG. 3.
Figure 5 is a partially exploded perspective view of the screw alignment part of Figure 3.
Figure 6 is a side view in vertical section of the coating part of Figure 2.
FIG. 7 is an explanatory view of the rear of the screw separation portion of FIG. 2.
FIG. 8 is an explanatory rear view of another embodiment of the screw separation portion of FIG. 2.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. The following description and attached drawings are for understanding the operation according to the present invention, and parts that can be easily implemented by a person skilled in the art may be omitted.

Additionally, the specification and drawings are not provided for the purpose of limiting the present invention, and the scope of the present invention should be determined by the claims. The terms used in this specification should be interpreted with meanings and concepts consistent with the technical idea of the present invention so as to most appropriately express the present invention.

FIG. 2 shows a schematic plan view of a screw alignment device and a screw coating device including the same according to an embodiment of the present invention viewed from above, and FIG. 3 is a partial enlarged view of an embodiment of A in FIG. 2. , and FIG. 4 is an explanatory diagram showing the posture of successively neighboring screws in the screw alignment portion of FIG. 3.

Referring to Figure 2, the screw coating device 200 according to an embodiment of the present invention aligns the heads of individual screws (S) to be attached to the screw transfer means (30) that transfers the screws by static electricity and then attaches them. A screw alignment device 100 and a release means 210 for separating the screw from the screw transportation means after transferring the screw transported by the screw transport means 30 of the screw alignment device 100 to a predetermined transport position. Includes ;

The screw coating device 200 is a screw head (S1) attached to the screw transfer means (30) by static electricity and is transferred in an aligned manner in order to coat the threaded portion (S2) of the screw (S) that is transferred in an aligned state. A screw coating unit 230 is provided to coat the threaded portion of the screw by providing a coating liquid to the screw S.

The screw that is subsequently continuously transported by the screw transport means 30 after being coated is subjected to heat at a predetermined temperature or a predetermined temperature toward the screw thread portion S2 of the screw S on the progress path of the screw transport means 30. A coating post-treatment unit 240 is disposed to dry or post-process the coating by irradiating light of different wavelengths.

The screw coating unit 230 is disposed between the screw alignment device 100 and the separation means 210 of the screw coating device 200, and the coating post-treatment unit 240 is located downstream and away from the screw coating unit 230. It is placed upstream of the means 210.

In FIG. 2, among the first and second rotation rollers 32 and 34 that provide rotational driving force to the screw transfer means 30 of the coating post-processing unit 240, the second rotation roller corresponds to the turning point of the transfer path. Although it is shown as being placed on the side of (34), it is not necessarily limited to this, and may be placed in a straight section of the screw conveying means (30).

Referring again to FIGS. 2 and 3, the screw alignment device 100 according to an embodiment of the present invention will be described in detail. The screw alignment device 100 according to an embodiment of the present invention includes a static electricity generation unit 20 that generates static electricity, wherein the static electricity generation unit 20 has one of a + electrostatic polarity and a - electrostatic polarity. It is provided with a first static electricity generator 22 that generates static electricity of a first polarity and a second static electricity generator 24 that generates static electricity of a second polarity other than the polarity generated by the first static electricity generator.

If the first static electricity generator 22 generates static electricity of + polarity, the second static electricity generator 24 generates static electricity of - polarity. Optionally, if the first static electricity generating unit 22 generates static electricity of - polarity, the second static electricity generating unit 24 generates static electricity of + polarity. A device that generates static electricity according to polarity is a known technology, and detailed description thereof will be omitted in this specification.

The screw alignment device 100 according to an embodiment of the present invention is charged in a non-contact manner with the first static electricity charging terminal 26a, which is electrically connected to the first static electricity generation unit 22 through the first static electricity wiring unit 26. and the screw transfer means 30, which supports and transfers the screw by the adhesion force caused by static electricity, and the second static electricity charging nozzle 28a of the second static electricity transfer unit 28 connected to the second static electricity generation unit 24. It includes a screw introduction part 40 that supplies a screw that is electrostatically charged in a non-contact manner.

The screw transfer means 30 is charged to the first polarity in a non-contact manner by the first static electricity generator 22, and the screw supplied from the screw introduction portion 40 is charged in a non-contact manner by the second static electricity generator 24. Charged with a second polarity.

The screw conveying means 30 is disposed at both ends of the conveying belt 36 and the inner side of the conveying belt and has an overall cylindrical shape having a friction force against the inner surface of the conveying belt or a surface shape complementary to a protrusion formed on the inner surface of the conveying belt. It includes a first rotation roller 32 and a second rotation roller 34. Although not shown in the drawing, when the effective transmission length of the transport belt is long, one or more intermediate rotating rollers (not shown) may be disposed along the way. It is preferable that the rotating roller is blocked from static electricity so that the screw electrostatically charged in the second polarity does not stick to it.

One side of the transfer belt 36 of the screw transfer means 30 is disposed adjacent to the screw introduction part 40 at a predetermined interval. The transport belt 36 may be made of a fluororesin material, but is not necessarily limited thereto, and may be made of various materials that can be electrostatically charged and have a certain flexibility.

The screw introduction part 40 guides the head S1 of the screw S to the outer surface of the transport belt 36 of the screw transport means 30. The screw introduction part 40 allows the screw to be attached to the transport belt 36 due to static electricity, but is spaced apart from the transport belt 36 at a predetermined interval so as not to interfere with the rotation of the transport belt 36. Here, the shortest distance between the transfer belt 36 and the screw introduction part 40 is set to the distance at which the screw can stick to the transfer belt due to static electricity.

The first static electricity generation unit 22 of the static electricity generation unit 20 is connected to the transfer belt 36 of the screw transfer means 30 through the first static electricity charging terminal 26a formed at the end of the first static electricity wiring unit 26. Of the entire length, for example, static electricity is supplied in a non-contact manner to a portion where the inner surface of the transport belt begins to contact the first rotating roller 32. The first electrostatic charge terminal 26a may be formed, for example, as a conductive terminal with three branches, and the maximum distance between the first electrostatic charge terminal 26a and the transport belt 36 may be electrostatically charged. It is separated by a distance.

The second static electricity generation unit 24 of the static electricity generation unit 20 is an end of the screw introduction part 40 that faces the transfer belt 36 through the second static electricity charging nozzle 28a of the second static electricity transfer part 28. Electrostatic electricity of the second polarity is provided non-contactly to the screw placed on the part to charge the screw to the second polarity.

As shown in FIG. 2, the screw introduction unit 40 is provided with a screw feed unit 48 that temporarily contains screws supplied from an external screw supply means and continuously supplies them in a predetermined amount. The screw feed portion 48 has a predetermined internal size to contain a predetermined amount of screws, and the inner surface of the screw feed portion 48 is continuously extended so that the screw can be guided while moving by vibration. A spiral rib 47 is provided.

The screw introduction part 40 is connected to the rib 47 and is connected to the screw contained in the guide path part 44 that guides the screw to the transport belt 36 of the screw transport means 30 while being continuously aligned in one row. It includes a vibration generator 42 that provides vibration, and a vibration transmission portion 43 that transmits the vibration generated by the vibration generator 42 to the screw introduction portion.

In addition, the guide path portion 44 of the screw introduction portion 40 is randomly oriented on the rib 47 to position the guided screws in one row (the head (S1) of the screw is facing upward and the screw portion (S2) is pointing downward. The screw is guided while being positioned in a position facing toward) and vibrated by the vibration generator 42.

As shown in FIG. 3, the screw introduction portion 40 is suitable for electrostatically attaching to the screw conveying means before the screw is attached to the conveying belt 36 of the screw conveying means 30 by electrostatic electricity. It includes a screw alignment unit 50 that transports the screw by aligning the posture of the screw so that the head is placed in a position facing the outer surface of the transport belt 36 of the screw transport means 30.

Referring again to FIGS. 2 and 3, the screw introduction unit 40 includes a feedback unit 46 that collects screws that are not seated in the screw alignment unit 50 and sends them back to the screw feed unit 48.

The guide path portion 44 has a bottom surface and side walls disposed at a predetermined height on both sides of the bottom surface. The height of the side wall is set to a height that can guide the screw while blocking the screw from going over the side wall. A screw alignment unit 50 is randomly arranged at a portion approaching the transfer belt 36 along the longitudinal direction in which the guide path unit 44 extends and aligns the screws transported by vibration to keep the direction of the head constant. is provided.

The screw that is not seated in the screw alignment part 50 is removed from the guide path part 44 by a separate screw removal air gun (not shown) and falls back to the screw feed part 48, and then returns to the screw introduction part 40. ), the supply moves along the rib 47.

As shown in FIGS. 3 and 5, the screw alignment unit 50 moves along the guide path unit 44 and transfers only the screw placed in the correct position among the screws moved by the vibration generated by the vibration generator. Alignment guide rail (44a); and a cover member 51 spaced apart from the alignment guide rail and covering the head of the screw.

Upstream of the alignment guide rail 44a, the screw head S1 is directed upward (z direction) and the screw portion S2 is directed downward so that the screws are primarily aligned, and the alignment guide rail 44a Downstream, the screw is aligned so that its head S1 faces the surface of the transport belt 36 (y direction).

That is, as shown in FIG. 4, the screws that are continuously conveyed in contact from the left side of FIG. 4 to the right side have the head (S1) facing upward from the position in which the head (S1) is facing upward (orientation facing the z direction). It is aligned to face (y direction in FIGS. 3 and 4).

As shown in FIG. 4, the alignment guide rail 44a of the screw alignment unit 50 and the The cover members 51 extend while being twisted and curved correspondingly while being spaced apart from each other.

Referring to FIG. 5, the alignment guide rail 44a is formed by protruding on both sides of the threaded portion accommodating slot 44ab and the threaded portion accommodating slot 44ab sized to accommodate the threaded portion S2 of the screw S, so that the head of the screw It includes a head support surface (44ac) on which (S1) is seated, and has a structure that extends in the longitudinal direction and is twisted. The direction in which the alignment guide rail 44a is twisted is the direction (z direction) such that the head support surface 44ac faces the upper surface of the screw alignment device at the upstream of the alignment guide rail 44a, and the transfer belt at the downstream thereof. It is set by ensuring that it is in the direction (y direction) facing the surface of (36).

The head support surface 44ac and the cover member 51 are spaced apart from each other by a distance that allows movement in the longitudinal direction of the alignment guide rail 44a, with a screw head S1 disposed therebetween.

Referring to FIGS. 3 and 5 , the most downstream end of the alignment guide rail 44a is provided with an extension portion 44ad that protrudes and extends further than the longitudinal end 51c of the cover member 51. Therefore, since the screw placed on the extension part 44ad does not have a cover member covering the head part, the screw leaves the alignment guide rail 44a of the screw alignment part 50 by the action of static electricity and enters the separation space 52. ) The transfer belt 36 of the screw transfer means 30 is attached.

Referring to Figures 3 and 4, the alignment guide rail 44a has an attitude variable section 46a before the screw head is oriented in the z direction and an attitude maintenance section 46b where the screw head is oriented in the z direction. ) includes. The attitude maintenance section 46b is set to a length such that the heads of a plurality of screws are adjacent to each other.

Figure 6 is a side view in vertical section of the coating part of Figure 2.

Referring to FIGS. 2 and 6, the screw coating device 200 according to an embodiment of the present invention includes a screw coating portion 230 that forms a coating surface on at least a portion of the screw transported by the screw transport means 30. ) includes.

The screw coating unit 230 includes a coating liquid supply nozzle 232 that supplies the coating liquid (C) to the threaded part (S2) of the screw from the upper side, and a wheel rotation shaft 236 to supply the coating liquid to the lower side of the screwed part (S2) of the screw. ) Includes at least one of the coating liquid application wheels 234 that rotate around. The coating liquid supplied from the coating liquid supply nozzle 232 and the coating liquid supplied to the wheel 234 are collected in the coating liquid collection unit 238.

Although not shown in the drawing, when the transport belt 36 is operated by lying horizontally instead of standing vertically, the spray direction of the coating liquid supply nozzle can be adjusted by taking into account the direction of the threaded part.

FIG. 7 is a rear view illustrating the screw release part of FIG. 2, and FIG. 8 is a back view illustrating another embodiment of the screw release part of FIG. 2.

Referring to FIG. 7, the release means 210 is attached to the transfer belt 36 of the screw transfer means 30 by static electricity and is disposed to interfere with the transfer path of the transferred screw, so that the screw S is caught and the screw is moved. It includes a frame member 212 that separates from the transport belt 36 of the transport means 30, wherein the frame member is insulated from static electricity. Accordingly, the screw attached to the transport belt 36 due to static electricity falls without sticking to the frame member and is collected in the screw collection unit 220.

Referring to FIG. 8, the release means 210 includes a release air gun 212' that is attached to the screw transfer means by static electricity and sprays air toward the transferred screw. The air sprayed from the release air gun 212' is sprayed at a pressure that exceeds the adhesion force of static electricity while the transfer belt 36 and the screw S are attached by static electricity.

At this time, optionally, as shown in FIG. 2, a static electricity removal unit 250 that removes static electricity may be connected to the separation means 210.

Although specific embodiments have been described in detail in the specification, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in the technical field to which the present invention pertains, and such modifications are within the scope of the present invention. included in

With regard to interpretation, it can be understood that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention.

The disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of this invention is indicated in the patent claims, not the foregoing description, and any differences within the equivalent scope should be interpreted as being included in this invention.

In the case of terms whose meaning is not specifically defined in this invention, they should be interpreted broadly in their general meaning and should be interpreted to include other terms of equivalent scope.

100: screw alignment device S: screw
S1: Head S2: Threaded part
20: static electricity generation unit 22: first static electricity generation unit
24: second static electricity generating unit 26: first static electricity generating unit
26a: first electrostatically charged terminal 28: second electrostatically charged portion
28a: second electrostatically charged nozzle
30: screw conveying means 32: first rotating roller
34: second rotating roller 36: conveying belt
40: Screw introduction part 42: Vibration generating part
43: Vibration transmission part 44: Guide path part
44a: Alignment guide rail 46: Feedback unit
48: Screw feed part
50: screw alignment part 51: cover member
51a: side 51b: outer surface
51c: end 52: separation space
200: screw coating device
210: Separation means 212: Frame member
213: Inclined guide surface 212': 2nd air gun
220: screw collection part 230: screw coating part
232: Coating liquid supply nozzle 234: Coating liquid application wheel
236: wheel rotation axis 238: coating liquid collection unit
240: Coating post-processing unit 250: Static electricity removal unit
C: Coating liquid

Claims (12)

A first static electricity generating unit that generates static electricity of a first polarity, which is one of + electrostatic polarity and - electrostatic polarity, and a second electrostatic electricity that generates static electricity of a second polarity other than the polarity generated by the first static electricity generating unit. A static electricity generation unit including a static electricity generation unit;
a screw transfer means that is electrostatically charged to a first polarity by the first static electricity generator in a non-contact state with the first electrostatic charging terminal of the first static electricity generator and supports and transports the screw with an adhesion force due to static electricity; and
It includes a screw introduction unit that supplies a screw that is electrostatically charged to a second polarity by the second static electricity generation unit,
The screw supplied from the screw introduction unit is electrostatically charged to a second polarity by the second static electricity generator in a non-contact state with the second electrostatic charging nozzle in communication with the second static electricity generator,
A screw alignment device, characterized in that the screw transport means comprises a transport belt made of a material that can be charged by static electricity. delete delete According to claim 1,
A screw alignment device further comprising a screw alignment portion configured to guide the head of the screw supplied through the screw introduction portion to the belt surface of the screw transport means. According to claim 4,
The screw introduction part is,
a vibration generator that provides vibration to the screw contained in the screw introduction part;
a guide path portion that guides the screw to the screw alignment portion while vibrating by the vibration generating portion; and
A screw alignment device comprising a feedback unit that collects screws that are not seated in the screw alignment unit and provides them back to the guide path unit. According to claim 5,
The screw alignment part is,
An alignment guide rail that moves only the screws in the correct position among the screws that move along the guide path and move by vibration generated by the vibration generator; and
A screw alignment device comprising a cover member spaced apart from the alignment guide rail and covering the head of the screw. According to claim 6,
A screw alignment device, wherein the alignment guide rail and the cover member are spaced apart from each other and twisted and curved to direct the head of the screw toward the belt surface of the screw transport means. A screw alignment device according to any one of claims 1, 4 to 7; and
A screw coating device comprising: a release means for separating the screw from the screw transfer means after transferring the screw transferred by the screw transfer means of the screw alignment device to a predetermined transfer position. According to claim 8,
The release means includes a frame member that is attached to the screw transfer means by static electricity and disposed in the transfer path of the transferred screw to separate the screw from the screw transfer means, wherein the frame member is insulated from static electricity. screw coating device. According to claim 8,
The screw coating device is characterized in that the release means includes a release air gun that is attached to the screw transfer means by static electricity and sprays air toward the transferred screw. According to claim 8,
A screw coating device further comprising a screw coating portion that forms a coating surface on at least a portion of the screw transported by the screw transport means. According to claim 11,
The screw coating unit includes a coating liquid supply nozzle that supplies the coating liquid to the threaded part of the screw from the upper side; and
a coating liquid application wheel that supplies the coating liquid to the lower side of the threaded portion of the screw; A screw coating device, characterized in that it additionally includes at least one.