KR101675464B1 - Tapping screw to improve contracting force - Google Patents

Tapping screw to improve contracting force Download PDF

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Publication number
KR101675464B1
KR101675464B1 KR1020160037188A KR20160037188A KR101675464B1 KR 101675464 B1 KR101675464 B1 KR 101675464B1 KR 1020160037188 A KR1020160037188 A KR 1020160037188A KR 20160037188 A KR20160037188 A KR 20160037188A KR 101675464 B1 KR101675464 B1 KR 101675464B1
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KR
South Korea
Prior art keywords
fastening
threads
thread
tapping screw
cutting
Prior art date
Application number
KR1020160037188A
Other languages
Korean (ko)
Inventor
이진석
Original Assignee
주식회사 서울금속
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Priority to KR1020160037188A priority Critical patent/KR101675464B1/en
Application granted granted Critical
Publication of KR101675464B1 publication Critical patent/KR101675464B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0073—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw characterised by its pitch, e.g. a varying pitch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms

Abstract

According to the present invention, a tapping screw having an improved clamping force comprises: a head portion; and a body portion connected to the head portion, and having a plurality of threads formed on an outer peripheral surface thereof. A cut thread is formed on a foremost end of the body portion in a fastening direction of the body portion. A fastening thread is formed on the rear of the cut thread with respect to the fastening direction of the body portion. The height of the cut thread is higher than that of the fastening thread. The tapping screw having an improved clamping force can improve a fastening force by the cut thread formed on the foremost end of the tapping screw, and can allow the fastening thread formed on a fastening portion and a completion portion to extend a female thread formed inside an object to be fastened in a width direction to increase a fastening area, thereby further improving the fastening force of the tapping screw and reducing fastening torque.

Description

[0001] TAPPING SCREW TO IMPROVE CONTRACTING FORCE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tapping screw, and more particularly to a tapping screw having an improved fastening force for improving a fastening area of a tapping screw fastened to a fastening object.

Generally, a screw (screw) has a strong fixing force when a plurality of parts are combined, including a mechanical part and an electronic device, while it is easy to construct, and the fastening force can be adjusted according to the fastening partner Use screws that are easy to disassemble.

Such a screw is divided into a triangular screw, a square screw, a trapezoidal screw, a toothed screw, a round screw, and a ball screw according to the sectional shape of a thread formed on the outer circumferential surface. Head screws, and the like.

Depending on the shape of the screw, it can be divided into small screws, stop screws, screws, tapping screws, and helical inserts.

At this time, the tapping screw is a screw capable of forming a female thread on the object to be fastened by the screw itself, thereby reducing the deformation of the fastening object and reducing the tightening torque. These tapping screws include pot tapping screws, plate tapping screws, round plate tapping screws, and hexap tapping screws depending on the shape of the head.

On the other hand, such a tapping screw has a problem that the fastening force is lowered in the process of shrinking and expanding according to a change in temperature, including vibrations and physical impact transmitted from the outside, in a state where fastening to the fastening object is completed.

In addition, since the length of the thread (that is, the female thread) is not initially formed in the fastening object due to the nature of the tapping screw fastened to the fastening object by the thread of the screw itself, Or the threads are slipped to fail to be accurately fastened to the fastening object at a desired angle or to have a high fastening force.

The present applicant has proposed the present invention in order to solve the above-mentioned problems. As a prior art document related thereto, Korean Utility Model Registration No. 20-0478117 (entitled: , Registration date: 2015.08.24).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tapping screw having an improved fastening force capable of improving a fastening area between a tapping screw fastened to a fastening object and a fastening object.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

The above object is achieved according to the present invention, A body portion having one end connected to the head portion and having a plurality of threads on an outer circumferential surface thereof; Wherein a cutting thread is provided at a leading end of the body in the fastening direction of the body and a fastening thread is provided behind the cutting thread with respect to a fastening direction of the body, The fastening force is formed to be larger than the height of the tapping screw.

Wherein the body portion includes an introduction portion, a fastening portion, and a completion portion that are sequentially provided from the front to the back along the fastening direction of the tapping screw, the cutting thread is formed on the introduction portion, and the fastening thread is formed on the fastening portion or the completion portion .

The width of the cutting threads may be less than the width of the fastening threads.

The width of the fastening threads may be increased from the introduction portion toward the finished portion.

The fastening threads may be formed of a plurality of threads having the same height.

The pitch between the cutting threads and the fastening threads and the pitch between the fastening threads and other fastening threads adjacent to the fastening threads may increase from the lead-in portion to the finished portion.

The cutting threads and the fastening threads may have different types of flank surfaces.

The cutting thread may have a flange surface with a straight cross section, and the fastening thread may have a flank having a curved cross section.

The tapping screw with improved fastening force of the present invention is characterized in that the fastening force of the tapping screw is improved by the cutting thread formed at the lead-in portion of the thread, and the fastening thread formed at the fastening portion and the finished portion is formed into the female thread formed inside the fastening object by the cutting thread The fastening force of the tapping screw can be further improved and the tightening torque can be reduced.

In addition, the tapping screw with improved fastening force of the present invention can prevent the tapping screw from being loosened from the fastening object as the fastening area of the fastening object is increased by the fastening thread formed to have a relatively large width.

FIG. 1 is a view showing a tapping screw with improved fastening force according to an embodiment of the present invention.
Fig. 2 is a sectional view of the tapping screw with improved fastening force shown in Fig. 1. Fig.
FIG. 3 is a view for explaining the shape of the tapping screw shown in FIG. 2. FIG.
Fig. 4 is a view for explaining the pitch of the tapping screw shown in Fig. 2. Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various variations of the drawings are expected. Thus, the embodiment is not limited to any particular form of the depicted area, but includes modifications of the form, for example, by manufacture.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tapping screw (hereinafter, referred to as 'tapping screw') having an improved fastening force according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view of a tapping screw having an improved fastening force shown in FIG. 1; FIG. 3 is a cross-sectional view illustrating a tapping screw shown in FIG. 2; FIG. And FIG. 4 is a view for explaining the pitch of the tapping screw shown in FIG. 2. FIG.

1 to 4, a tapping screw 100 according to an embodiment of the present invention is connected to a head 110 and a head 110, and has a plurality of threads 130 formed on an outer surface thereof (Not shown).

1 to 4, the head 110 is connected to the body 120. One end of the head 110 may be coupled to the body 120 and a fastener (not shown) may be formed at the other end. Here, the fastening part (not shown) formed at the other end of the head part 110 is a part where a tool for fastening the tapping screw 100 to the fastening object (not shown) can be inserted, It is preferable to provide it in the form of a groove or a groove. When the body part 120 is completely inserted into the object to be fastened (not shown) by a tool fitted to the fastening part (not shown) of the head part 110, one end part of the head part 110 is fastened ). ≪ / RTI >

Although the shape of the head 110 is shown in the form of a cylinder in the figure, the shape of the head 110 is not limited thereto, and may be formed in various shapes such as a rectangle and a hexagon.

One end of the body part 120 is connected to the head part 110 and a plurality of threads 130 may be provided on the outer surface of the body part 120. Specifically, the body portion 120 may be formed in a cylindrical shape having a length that is narrower than the width of the head portion 110 and is long in the longitudinal direction. At this time, a plurality of threads 130 may be provided on the outer circumferential surface of the body portion 120 having a cylindrical shape.

The body part 120 is inserted into the object to be fastened (not shown) by a tool or the like fitted to the head part 110. At this time, the other end part of the body part 120 is fastened to the fastening object ) In the form of a conical shape.

2, the body part 120 provided with the plurality of threads 130 and the thread 130 provided on the body part 120 are formed in a manner that the tapping screw 100 is fastened to the fastening object (not shown) The fastening portion 124 and the completion portion 126 along the fastening direction (see F in FIG. 2) to the fastening object (not shown) of the tapping screw 100, . That is, in brief, the body portion 120 is provided with an introduction portion 122, a fastening portion 124, and a completion portion 126 in order from the end portion to be first contacted with the fastening object (not shown) to the head portion 110 .

Specifically, the introduction part 122 is a part where the body part 120 starts to enter the fastening object (not shown) and is a part where the thread 130 and the object to be fastened (not shown) are screwed together for the first time, (Not shown) to form a female thread corresponding to the thread 130. At this time, a cut-out thread 132 may be formed in the introduction part 122, in which the end face of the flank face 131 is formed in a straight line shape.

The cutting thread 132 may be formed at least in the introduction part 122 and may be provided over the introduction part 122 and the fastening part 124 if necessary. That is, the tapping screw 100 can be tapped while cutting the inside of the object to be fastened (not shown) in the height direction of the cutting thread 132 by the cutting thread 132 provided in the introduction part 122. Since the incision thread 132 is tapped while cutting the inside of the fastening object (not shown) in the height direction, the power of the fastening object (not shown) and the power of the tapping screw 100 ).

The coupling part 124 is connected to the coupling part (not shown) through the introduction part 122 after the body part 120 enters the coupling object (not shown) by the introduction part 122 And the completion portion 126 is a portion where the thread 130 is completely fastened to the object to be fastened (not shown).

At this time, the fastening part 124 and the completion part 126 are fastened to the fastening object (not shown) through the female thread formed inside the fastening object (not shown) by the cutting thread 132 of the introduction part 122 have.

As shown in the figure, the fastening threads 134 formed on the fastening portions 124 and the finished portions 126 are formed so that the cross-sectional shape of the flank surface 133 is a straight line .

However, in some cases, the fastening threads 134 formed in the fastening portions 124 and the finished portions 126 are curved in a cross-sectional shape of the flank surfaces 133, unlike the incision threads 132 formed in the introduction portions 122 A fastening thread 134 may be provided. In other words, a fine curved or curved surface may be formed in the acid portion of the thread instead of the cross-sectional shape of the flank surface 133 of the fastening thread 134 being formed as a complete straight line.

In the case where the cross section of the flank surface 133 of the fastening thread 134 has a curved shape, the curvature may vary depending on the type of the fastening object (not shown). The flank surface 133 of the fastening thread 134 has a predetermined curvature and the greater the curvature of the flank surface 133 of the fastening thread 134 is, the more the gap between the fastening object (not shown) and the fastening thread 134 So that the fastening force of the tapping screw 100 with respect to the fastening object (not shown) can be improved. However, if the curvature of the flange surface 133 of the fastening thread 134 is made too large to have a gentle curve, the length of the tapping screw 100 in the longitudinal direction becomes long, The number of threads 130 becomes too small so that the curvature of the flank surface 133 of the fastening thread 134 is preferably determined in consideration of the necessary fastening force.

The shape of the fastening thread 134 formed on the fastening part 124 and the finished part 126 is different from the shape of the cutting thread 132 formed on the introduction part 122, Because the role of the cutting thread 132 formed in the introduction part 122 and the plurality of fastening threads 134 formed in the fastening part 124 and the completion part 126 are different from each other. That is, the cutting thread 132 formed in the lead-in portion 122 serves to taper while cutting the inside of the object to be fastened (L) in the direction of height L, and the fastening portion 124 and the finished portion 126, The fastening threads 134 formed on the fastening threads 134 are formed in the fastening object (not shown) cut by the cutting threads 132, that is, the female threads formed in the fastening object (not shown) by the cutting threads 132, The cutting threads 132 formed on the introduction part 122 and the fastening threads 134 formed on the fastening part 124 and the finished part 126 are formed differently from each other It is not.

However, the cross-sectional shape of the flank 133 of the fastening thread 134 may be formed to have a straight cross-sectional shape, not a curved line, depending on the required fastening force or the like. As described above, since the fastening thread 134 is formed by increasing the fastening force of the fastening thread 132 by further extending the arm or thread formed in the fastening object (not shown) in the direction of the width W of the thread, The surface 133 need not be formed in the shape of a curved section. That is, if the fastening thread 134 has a height L smaller than the cutting thread 132 and a width W larger than the cutting thread 132, the flank surface 133 may have a curved or straight cross-sectional shape.

A cutting thread 132 formed in the introduction part 122 and a fastening thread 134 formed in the fastening part 124 and the finished part 126 will be described in detail with reference to FIGS.

The height L1 of the cutting thread 132 formed in the introduction part 122 may be greater than the height L2 of the fastening thread 134 formed in the fastening part 124 and the finished part 126. [ 3, the height L1 of the incising thread 132 may be about twice as large as the height L2 of the fastening thread 134, and the height of the incising thread 132 may be a length And may vary depending on the fastening force required for the object (not shown). At this time, the height L2 of the fastening threads 134 formed on the fastening part 124 and the finished part 126 is preferably all the same height. This is because the fastening threads 134 need only be enlarged in the direction of the widths W2 and W3 of the fastening threads 134 by the female thread already formed in the fastening object (not shown) by the cutting threads 132 Therefore, it is not necessary to form the plurality of fastening threads 134 at different heights. However, the present invention is not limited thereto, and the height of the fastening threads 134 may vary depending on the fastening force required for the fastening object (not shown) to which the tapping screw 100 is fastened.

In addition, the width W of the cutting thread 132 may be less than the width W2 (W3) of the fastening threads 134. As described above, since the incision thread 132 is formed by cutting the inside of the object to be fastened (not shown) in the height direction by the introduction part 122 of the tapping screw 100 to form a female thread, It is not necessary to increase the width W1. However, it is preferable that the width W2 (W3) of the fastening threads 134 is formed to be equal to or greater than the width W1 of the cutting threads 132 at least. Because the fastening threads 134 extend the interior of the fastening object (not shown) cut by the cutting threads 132 in the width W2 (W3) direction of the fastening threads 134, the fastening threads 134 By increasing the width W2 (W3) of the tapping screw 100 to improve the fastening force of the tapping screw 100 by improving the fastening area with the fastening object (not shown).

4, the incision thread 132 and the fastening threads 134 according to the embodiment of the present invention are formed in a direction opposite to the fastening direction (see F in FIG. 2) of the tapping screw 100 The widths W1 to W5 may be increased. In other words, the width W1 of the cutting thread 132 formed in the introduction part 122 and the widths W2 to W5 of the plurality of fastening threads 134 formed in the fastening part 124 and the completion part 126 are set to be smaller To the finishing portion 126, as shown in FIG.

Describing the tightening action of the thread 130 shown in FIG. 4, the cutting thread 132 first enters the fastening object and forms the same female threads as the cutting thread 132 on the fastening object. At this time, the cutting thread 132 is tapped while cutting the inside of the object to be cut in the height direction of the cutting thread 132. The first fastening threads 134a located behind the cutting threads 132 then enter the female thread formed by the cutting threads 132. The width W2 of the first fastening threads 134a, The first fastening thread 134a is tapped on the fastening object while expanding the female thread formed by the cutting thread 132 in the width direction. The second fastening threads 134b then enter the female thread extending in the width direction by the first fastening threads 134a so that the width W3 of the second fastening threads 134b is smaller than the width W3 of the first fastening threads 134a The second fastening thread 134b is tapped on the fastening object while expanding the female thread formed by the first fastening thread 134a in the width direction. Then, when the third fastening thread 134c and the fourth fastening thread 134d are sequentially expanded in the width direction, they are tapped to the fastening object.

As described above, the widths W2 to W5 of the fastening threads 134 gradually increase from the introduction part 122 to the completion part 126, so that the fastening force between the fastening threads 134 and the fastening object can be further increased.

Meanwhile, the pitch P between the cutting thread 132 and the fastening thread 134 according to an embodiment of the present invention may increase toward the direction opposite to the fastening direction F of the tapping screw 100.

Where the pitch P is the distance between adjacent threads 130 of the threads 130 of the tapping screw 100. The pitch P may be the distance between the cutting threads 132 of the tapping screw 100 and the adjacent fastening threads 134 or the distance between the fastening threads 134 and the other fastening threads 134 adjacent thereto. The pitch P of the cutting threads 132 adjacent to the cutting threads 132 and the pitch P of the other fastening threads 134 adjacent to the fastening threads 134 are determined by the fastening portions 124, And the completion portion 126, as shown in FIG.

For example, as shown in Fig. 4, the pitch P between the cutting thread 132 of the lead-in portion 122 and the adjacent tightening thread 134 is P1, and the other tightening thread 134 adjacent to the tightening thread 134 is P1, The pitch P between the next tightening thread 134 and the adjacent tightening thread 134 is P3 and P4, then the cutting thread 132 and the fastening thread 134 The order of the sizes of the pitches P between the first and second electrodes 134 and 134 is' P1 <P2 <P3 <P4 ... ... '.

As shown in Figure 4, since the fastening threads 134 have a height that is less than the incision threads 132 and greater than the incision threads 132, The fastening thread 134 is fastened while further extending in the width direction, so that the fastening force between the fastening thread 134 and the fastening object can be increased. The tightening force between the fastening thread 134 and the fastening object can be further increased by gradually increasing the width of the fastening thread 134 from the introduction part 122 to the completion part 126.

According to the present invention, the fastening force of the tapping screw is improved by the cutting thread formed at the leading portion of the thread, and the fastening thread formed in the fastening portion and the finished portion is formed in the cutting thread The fastening force of the tapping screw can be further improved and the tightening torque can be reduced because the fastening area is enlarged by extending the female threads formed inside the fastening object in the width direction.

In addition, the tapping screw 100 with improved fastening force of the present invention can prevent the tapping screw from being unwound from the fastening object as the fastening area of the fastening object is increased by the fastening thread formed to have a relatively large width.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

100: Tapping screw with improved fastening force
110: head part 120: body part
122: introduction part 124: fastening part
126: Completion Department
130: thread 131, 133: flank face
132: incision thread 134: fastening thread
L: Height of thread W: Width of thread

Claims (8)

The present invention relates to a tapping screw for improving a fastening force of a screw ,
Head; And
A body portion having one end connected to the head portion and having a plurality of threads on an outer peripheral surface thereof and having an introduction portion, a fastening portion and a completion portion sequentially from the front to the back along the fastening direction of the tapping screw; / RTI &gt;
Wherein one end of each of the plurality of threads is provided with an incision thread at the leading end of the introducing portion with respect to a direction of fastening the body portion and the fastening portion and the completion portion are continuously provided at the rear side of the incision thread with respect to the fastening direction of the body portion Tightening thread is provided,
Wherein the height of the cutting threads is greater than the height of the fastening threads and the width of the cutting threads is less than the width of the fastening threads. The width of the fastening threads increases from the introduction portion to the finished portion,
Wherein the cutting threads and the fastening threads have different flank surfaces, wherein the cutting threads are formed into flank surfaces of a straight line in cross section, and some of the fastening threads are formed into flank surfaces of a straight line in cross- A part of which is formed into a curved flank surface in cross section ,
Wherein the fastening screw is formed with the same fastening thread as that of the cutting thread on the fastening object by the cutting thread formed at the leading end of the fastening part when the tapping screw enters the fastening object.
delete delete delete The method according to claim 1,
Wherein the fastening threads are formed of a plurality of threads having the same height.
6. The method of claim 5,
Wherein the pitch between the cutting threads and the fastening threads and the pitch between the fastening threads adjacent to the fastening threads increase from the lead-in portion to the finished portion.
delete delete
KR1020160037188A 2016-03-28 2016-03-28 Tapping screw to improve contracting force KR101675464B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102060581B1 (en) 2017-03-30 2019-12-30 주식회사 서울금속 Tapping screw to improve force for contracting and preventing loosening

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0642515A (en) * 1992-01-27 1994-02-15 Seiichiro Takasaki Screw
JPH0718016U (en) * 1993-08-31 1995-03-31 若井産業株式会社 screw
JPH081340U (en) * 1996-02-09 1996-09-03 日東精工株式会社 Tapping screw
JP2000266020A (en) * 1999-03-16 2000-09-26 Max Co Ltd Screw and screw fastening method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0642515A (en) * 1992-01-27 1994-02-15 Seiichiro Takasaki Screw
JPH0718016U (en) * 1993-08-31 1995-03-31 若井産業株式会社 screw
JPH081340U (en) * 1996-02-09 1996-09-03 日東精工株式会社 Tapping screw
JP2000266020A (en) * 1999-03-16 2000-09-26 Max Co Ltd Screw and screw fastening method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102060581B1 (en) 2017-03-30 2019-12-30 주식회사 서울금속 Tapping screw to improve force for contracting and preventing loosening

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