WO2017159898A1 - 체결력이 향상된 태핑나사 - Google Patents
체결력이 향상된 태핑나사 Download PDFInfo
- Publication number
- WO2017159898A1 WO2017159898A1 PCT/KR2016/002735 KR2016002735W WO2017159898A1 WO 2017159898 A1 WO2017159898 A1 WO 2017159898A1 KR 2016002735 W KR2016002735 W KR 2016002735W WO 2017159898 A1 WO2017159898 A1 WO 2017159898A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fastening
- screw thread
- body portion
- flank
- thread
- Prior art date
Links
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000005520 cutting process Methods 0.000 description 24
- 239000011295 pitch Substances 0.000 description 13
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- 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
- F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
- F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
- F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
- F16B12/14—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using threaded bolts or screws
- F16B12/16—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using threaded bolts or screws using self-tapping screws
-
- 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
Definitions
- the present invention relates to a tapping screw, and more particularly to a tapping screw having an improved fastening force that can improve the fastening area of the tapping screw fastened to the fastening object.
- screws In general, screws (screws) generally have a strong fixing force when joining a plurality of components, including mechanical parts or electronics, easy construction, and can adjust the fastening force according to the fastening partner (or the base material). Use screws that are easy to disassemble at the same time.
- Such screws are divided into triangular screws, square screws, trapezoidal screws, toothed screws, round screws, ball screws, etc., depending on the cross-sectional shape of the thread formed on the outer circumferential surface. It is divided into various head screws.
- the shape of the screw is divided into a variety of small screws, stop screws, screws, tapping screws, heli-inserts.
- the tapping screw is a screw that can be clipped to form a female screw on the fastening object by the screw itself, it is possible to reduce the deformation of the fastening partner and to reduce the fastening torque.
- the tapping screw includes a pot tapping screw, a plate tapping screw, a round plate tapping screw, a hexagonal tapping screw and the like according to the head shape.
- the thread length ie, female thread
- the thread length is not formed in the fastening object from the beginning due to the characteristics of the tapping screw fastened to the fastening object by the screw thread of the screw itself, when the fastening force is caused by the friction force between the fastening object and the thread, There is a problem that it does not have a lot or the thread slips and does not have a fastening force or high fastening force to the fastening object at the desired angle.
- An object of the present invention is to provide a tapping screw having an improved fastening force that can improve the fastening area between the tapping screw fastened to the fastening object and the fastening object.
- the head For solving the above problems, the present invention, the head; And a body portion having one end connected to the head and having a plurality of threads provided on an outer circumferential surface thereof, wherein the plurality of threads are formed in the entire longitudinal direction of the body portion or at least a predetermined section in the longitudinal direction of the body portion. And a plurality of fastening screw threads, wherein the plurality of fastening screw threads can provide a tapping screw having an improved fastening force, characterized in that the width of the fastening screw thread is formed to increase from the other end of the body portion toward one end of the body portion. .
- the fastening screw thread includes a first flank surface that is a flank surface facing toward the other end of the body portion, and a second flank surface that is a flank surface facing toward one end of the body portion.
- Each of the fastening screws has a first flank side angle formed by the axis of the first flank and the body portion to decrease from the other end of the body portion toward one end of the body portion, and the axis of the second flank surface and the body portion is reduced.
- the second flank side angle to be formed is characterized in that the same from the other end of the body portion to one end of the body portion.
- the plurality of fastening screws are all characterized by having the same thread height.
- the body part includes an introduction part, a fastening part and a completion part sequentially provided in the direction of one end of the body part from the other end of the body part, and the plurality of fastening screws have the fastening part or the fastening part and It is characterized in that formed in the completed portion.
- At least one incision thread having a height greater than the height of the fastening screw thread and a width smaller than the width of the fastening screw thread is provided on the outer circumferential surface of the introduction portion.
- the pitch between the incision screw thread and the fastening screw thread and the pitch between the fastening screw thread and another fastening screw thread adjacent to the fastening screw thread are increased from the other end of the body part toward one end of the body part.
- the incision screw thread has a flank surface having a straight cross section
- the fastening screw thread is formed to have a flank surface having a curved cross section
- the plurality of threads may include a first flank angle formed by a first flank surface, which is a flank surface facing the other end side of the body portion, and a vertical line with respect to the axis of the body portion, and one end side of the body portion. And a second flank angle formed by a second flank face which is a facing flank face and a vertical line with respect to an axis of the body portion, wherein the plurality of fastening screws have a first flank angle greater than or equal to the second flank angle.
- At least one asymmetric screw thread having the first flank angle smaller than the second flank angle is provided on the outer circumferential surface of the completion part.
- At least one or more threads of the last tightening screw thread facing the asymmetric thread among the asymmetric threads and the plurality of tightening threads are more than the first flank surface or the second flank surface at the portion where the thread and the body portion meet. Characterized in that the transition portion formed at a gentle angle.
- the tapping screw with improved tightening force of the present invention is improved in the tightening force of the tapping screw by the incision screw thread formed in the inlet portion of the screw, and the tightening screw thread formed in the fastening portion and the completed portion is a female thread formed inside the fastening object by the incision thread. Expansion in the width direction increases the tightening area can further improve the tightening force of the tapping screw and reduce the tightening torque.
- tapping screw having improved fastening force of the present invention can be prevented from being released from the fastening object as the fastening area of the fastening object is increased by the fastening screw 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 cross-sectional view of a tapping screw having an improved fastening force shown in FIG. 1.
- FIG. 3 is a view for explaining the shape of the tapping screw shown in FIG.
- FIG. 4 is a view for explaining the pitch of the tapping screw shown in FIG.
- FIG. 5 is a view showing a tapping screw according to a further embodiment of the present invention.
- FIG. 6 is an enlarged view of a part of the tapping screw illustrated in FIG. 5.
- Embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various modifications of the drawings are expected. Thus, the embodiment is not limited to the specific form of the illustrated region, but includes, for example, modification of the form by manufacture.
- tapping screw 100, hereinafter referred to as “tapping screw” is improved fastening force according to an embodiment of the present invention.
- FIG. 1 is a view showing a tapping screw with improved tightening force according to an embodiment of the present invention
- Figure 2 is a cross-sectional view of the tapping screw with improved tightening force shown in Figure 1
- Figure 3 illustrates the shape of the tapping screw shown in Figure 2 4
- 4 are views for explaining the pitch of the tapping screw shown in FIG. 2.
- the tapping screw 100 is connected to the head 110 and the head 110 and a plurality of threads 130 are provided on the outer circumferential surface thereof. It may include a body portion 120 to be.
- the head 110 is a portion connected to the body 120.
- One end of the head 110 may be connected to the body portion 120, the other end may be a fastening portion (not shown).
- a fastening part (not shown) formed at the other end of the head 110 is a part into which a tool for fastening the tapping screw 100 to a fastening object (not shown) may be inserted, and a tool may be inserted therein. It is preferable to be provided in the form of a groove or groove so that.
- the body 120 is completely inserted into the fastening object (not shown) by a tool inserted into the fastening part (not shown) of the head 110, one end of the head 110 is fastened to the fastening object (not shown). ) Can be in full contact.
- the shape of the head 110 is illustrated in the form of a cylinder in the drawing, the shape of the head 110 is not necessarily limited thereto, and may be formed in various shapes such as a rectangle and a hexagon.
- one end of the body 120 may be connected to the head 110, and a plurality of threads 130 may be provided on an outer circumferential surface of the body 120.
- the body portion 120 may be formed in a cylindrical shape having a length narrower than the width of the head 110 and the longitudinal direction.
- a plurality of threads 130 may be provided on the outer circumferential surface of the body 120 having a cylindrical shape.
- the plurality of threads includes a plurality of fastening screws in the entire longitudinal direction of the body portion or at least a predetermined section in the longitudinal direction of the body portion.
- the body portion 120 is inserted into a fastening object (not shown) by a tool fitted to the head 110, and at this time, the other end of the body portion 120 is fastening object (not shown). It can be formed into a conical shape so as to penetrate).
- the body portion 120 is provided with a plurality of threads 130 and the thread 130 is provided on the body portion 120, the tapping screw 100 is a fastening object (not shown)
- Introducing part 122, fastening part 124 and the completion part 126 along the fastening direction (see FIG. Can be divided into
- the fastening direction means one end of the body portion 120 from the other end of the body portion 120 (that is, the opposite end of the portion in which the head portion 110 is provided). Means the direction toward the head 110 is provided).
- the body portion 120 is the introduction portion 122, the fastening portion 124 and the completion from the end (that is, the other end) to the head 110 in the first contact with the fastening object (not shown) in order It may be provided as a part 126.
- the fastening portion or the fastening portion and the completion portion, the plurality of fastening screw thread may be provided.
- the introduction portion 122 is a portion in which the body 120 starts to enter the fastening object (not shown), and the thread 130 and the fastening object (not shown) are first screwed together, and the fastening object ( It is a portion that forms a female thread corresponding to the screw thread 130 in the inside of the (not shown).
- the introduction portion 122 may be provided with a cutting screw thread 132 having a cross section of the flank surface 131 formed in a straight line shape.
- the cutting thread 132 may be formed in at least one or more in the introduction portion 122, it may be provided over the introduction portion 122 and the fastening portion 124 as necessary.
- the cutting thread 132 has a height L1 larger than the height L2 of the fastening screw thread 134 and a width W1 smaller than the width W2, W3, W4, W5 of the fastening screw thread 134. It is formed to have). That is, the tapping screw 100 may be tapped by cutting the inside of the fastening object (not shown) in the height direction of the cutting screw thread 132 by the cutting screw thread 132 provided in the introduction part 122.
- the incision screw thread 132 makes the tapping fastening while cutting the inside of the fastening object (not shown) in the height direction, the power lock of the fastening object (not shown) and the tapping screw 100 by the incision screw thread 132. ) Is possible.
- the fastening part 124 is the body portion 120 enters the fastening object (not shown) by the introduction portion 122, the threaded portion 130 is fastened to the fastening object (not shown) after the introduction portion 122.
- the completion portion 126 is a portion where the thread 130 is fastened with the fastening object (not shown).
- the fastening part 124 and the completion part 126 may be fastened with 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.
- the fastening screw thread 134 formed in the fastening portion 124 and the completion portion 126 has a straight cross-sectional shape of the flank surface 133 similarly to the cutting thread thread 132 formed in the inlet portion 122. It is preferable to form.
- the fastening screw thread 134 is a first flank which is a flank surface facing toward the other end of the body portion 120 (that is, toward the fastening direction F2 of FIG. 2).
- Surface 133a a second flank surface 133b which is a flank surface facing one end of the body portion 120 (that is, facing the direction opposite to the fastening direction F2 of FIG.
- flank angle formed by the flank surface 133a and the second flank surface 133b i.e., the angle of the mountain portion of the fastening screw thread
- the axis of the first flank surface 133a and the body portion 120 or First flank lateral angle ⁇ formed in the axial direction A, and second flank lateral angle formed by the axial or axial direction A of the second flank 133b and the body portion 120. ⁇ ).
- the fastening screw thread 134 formed in the fastening part 124 and the completion part 126 has a curved cross-sectional shape of the flank surface 133 unlike the cutting thread thread 132 formed in the inlet part 122.
- a fastening screw thread 134 to be formed may be provided.
- a fine curve or curved surface may be formed in the peak portion of the thread.
- the cross section of the flank surface 133 of the fastening screw thread 134 has a curved shape
- its curvature may vary depending on the type of fastening object (not shown). That is, the flank surface 133 of the fastening screw thread 134 has a predetermined curvature, and as the curvature of the flank surface 133 of the fastening screw thread 134 increases, the fastening object (not shown) and the fastening screw thread 134 become larger. The frictional force is increased, and accordingly, the tapping screw 100 may improve the fastening force with respect to the fastening object (not shown).
- the curvature of the flank surface 133 of the fastening screw thread 134 is too large to form a smooth curve, the longitudinal length of the tapping screw 100 becomes long or on the tapping screw 100. Since the number of threads 130 becomes too small, the curvature of the flanks 133 of the fastening screw thread 134 is preferably determined in consideration of the required fastening force.
- the cross-sectional shape of the flank surface 133 is curved, unlike the shape of the fastening screw thread 134 formed in the fastening portion 124 and the completion portion 126 is different from the shape of the incision screw thread 132 formed in the inlet portion 122.
- the reason for having is because the role of the cutting screw thread 132 formed in the introduction portion 122 and the plurality of fastening screw thread 134 formed in the fastening portion 124 and the completion portion 126 is different. That is, the incision screw thread 132 formed in the introduction part 122 serves to tap and fasten the inside of the fastening object (not shown) in the height L direction, and the fastening part 124 and the completion part 126.
- the fastening screw thread 134 formed at the inside of the fastening object (not shown) cut by the incision screw thread 132 that is, the width of the screw thread formed inside the fastening object (not shown) by the cutting thread 132. Since the tapping fastening is further extended in the (W) direction, the incision screw thread 132 formed in the inlet 122 and the fastening screw thread 134 formed in the fastening part 124 and the completion part 126 may be formed differently. It is not there.
- the cross-sectional shape of the flank surface 133 of the fastening screw thread 134 may be formed to have a straight cross-sectional shape instead of a curved line according to the required fastening force.
- the fastening screw thread 134 is to increase the fastening force by further expanding the female thread formed on the fastening object (not shown) by the incision screw thread 132 in the width (W) direction of the screw thread, so that the flank must be Face 133 need not be formed in the shape of a curved cross section. That is, the fastening screw thread 134 may be formed in a curved or straight cross-sectional shape if the height L is smaller than the cutting thread thread 132 and the width W is larger.
- the height L1 of the cutting thread 132 formed in the inlet 122 may be greater than the height L2 of the fastening screw 134 formed in the fastening part 124 and the completion part 126.
- the height L1 of the incision screw thread 132 may be provided about twice as large as the height L2 of the fastening screw thread 134, and the height of the incision screw thread 132 is fastened. It may vary depending on the fastening force required for the object (not shown). At this time, it is preferable that the heights L2 of the fastening screw threads 134 formed on the fastening part 124 and the completion part 126 are all formed at the same height.
- the fastening screw thread 134 only needs to further expand the female screw thread already formed inside the fastening object (not shown) by the incision screw thread 132 in the width W2 (W3) direction of the fastening screw thread 134. Therefore, it is not necessary to form different height of the plurality of fastening screw thread 134.
- the present invention is not limited thereto, and the height of the fastening screw threads 134 may vary depending on a fastening force required for a fastening object (not shown), to which the tapping screw 100 is fastened.
- the width W of the incision screw thread 132 may be smaller than the width W2 and W3 of the fastening screw thread 134.
- the incision screw thread 132 cuts the inside of the fastening object (not shown) in the height direction from the inlet portion 122 of the tapping screw 100 to form a female screw thread, the incision screw thread 132 is dared. It is not necessary to increase the width W1 of.
- the width W2 and W3 of the fastening screw thread 134 is preferably formed at least equal to or wider than the width W1 of the cutting thread thread 132.
- fastening screw thread 134 extends the inside of the fastening object (not shown) cut by the cutting screw thread 132 in the direction of the width W2 (W3) of the fastening screw thread 134.
- the width W1 of the cut thread 132 formed in the inlet 122 and the width W2 to W5 of the plurality of fastening screw threads 134 formed in the fastening part 124 and the completion part 126 are fastening parts. It may be formed to gradually increase from 124 to the completion unit 126.
- the incision screw thread 132 enters the fastening object for the first time to form a female screw thread identical to the shape of the incision screw thread 132 on the fastening object.
- the incision screw thread 132 is tapped and fastened while cutting the inside of the fastening object in the height direction of the incision screw thread 132.
- the first tightening screw thread 134a positioned at the rear of the cutting screw thread 132 enters the female screw thread formed by the cut screw thread 132, and the width W2 of the first tightening screw thread 134a is the cut screw thread.
- the first fastening screw thread 134a is fastened to the fastening object while extending the female thread thread formed by the cut screw thread 132 in the width direction.
- the second fastening screw thread 134b enters the female screw thread extended in the width direction by the first fastening screw thread 134a.
- the width W3 of the second fastening screw thread 134b is the first fastening screw thread 134a. Since the width W2 is greater than the width W2, the second tightening screw thread 134b is fastened to the fastening object while the female screw thread formed by the first screw thread 134a extends in the width direction.
- each of the plurality of fastening screws 134a, 134b, 134c, and 134d has a first flank side angle ⁇ of the fastening screw thread 134. It is formed to decrease toward the other end of the body portion 120 from the other end of the body portion 120, and at the same time each of the plurality of fastening screw threads 134a, 134b, 134c, 134d, the fastening screw thread 134
- the second flank side angle ⁇ of) is formed to be the same from the other end of the body portion 120 to one end of the body portion.
- the first flank side angle ⁇ of the plurality of fastening screws is formed such that ⁇ 1> ⁇ 2> ⁇ 3> ⁇ 4>...> ⁇ n with reference to FIG. 4, and the first flank side of the plurality of fastening threads.
- the first side flank angle ( ⁇ ) of the plurality of coupling threads are the threads of the multiple fastening each successively ⁇ 1> ⁇ 2> ⁇ 3> ⁇ 4>...> can be formed such that ⁇ n
- the plurality of fastening screws may be formed such that the first flank lateral angle ⁇ is ⁇ 1> ⁇ 2> ⁇ 3> ⁇ 4>...> ⁇ n for each consecutive section.
- the plurality of fastening screw threads have a width from one end of the body portion to the other end of the body portion due to the gradual increase of the first flank side angle. It can be configured to increase gradually to not only significantly increase the tightening force between the tapping screw and the fastening object, but also because the second flank side angles are the same, the second flank of the female thread that the second flank surface is formed on the fastening object Since the surface is always formed at a constant angle, the second flank surface of the fastening thread can always be in close contact with the second flank surface of the female thread, so that the anti-loosening area can be increased after the tapping screw is fastened to the fastening object. The prevention effect can be significantly improved.
- the pitch (P) between the cutting screw thread 132 and the fastening screw thread 134 may be larger toward the opposite direction to the fastening direction (F) of the tapping screw 100.
- the pitch P is a distance between the threads 130 adjacent to each other among the threads 130 of the tapping screw 100. That is, the pitch P may be a distance between the cutting thread 132 of the tapping screw 100 and the adjacent fastening screw thread 134 or the distance between the fastening screw thread 134 and another fastening screw thread 134.
- the pitch P of the fastening screw thread 134 adjacent to the incision screw thread 132 and the pitch P of the other fastening screw thread 134 adjacent to the screw thread 134 are fastened to the fastening part 124 at the inlet 122. , To be gradually increased toward the completion unit 126.
- the pitch P between the incision thread 132 of the inlet 122 and the adjacent fastening screw thread 134 is denoted by P1, and another fastening screw thread adjacent to the fastening screw thread 134.
- P1 the pitch P between the incision thread 132 of the inlet 122 and the adjacent fastening screw thread 134
- another fastening screw thread adjacent to the fastening screw thread 134 the pitch P between 134
- P3 and P4 the pitch P between the next tightening screw thread 134 and another fastening screw thread 134 adjacent
- the cut thread 132 and the fastening screw thread ( The order of the magnitudes of the pitches P between 134) may be referred to as 'P1 ⁇ P2 ⁇ P3 ⁇ P4'.
- the tightening screw thread 134 has a height smaller than the cutting screw thread 132 but has a width larger than the cutting screw thread 132, a female thread thread formed by the cutting screw thread 132 in the fastening object.
- the fastening screw thread 134 is fastened while extending the width direction to increase the fastening force between the fastening screw thread 134 and the fastening object.
- the fastening force between the fastening screw thread 134 and the fastening object can be further increased.
- the tapping screw 100 having improved tightening force according to the present invention is improved in the tightening force of the tapping screw by the incision screw thread formed at the inlet portion of the screw, and the tightening screw thread formed at the fastening portion and the completed portion is disposed on the incision thread.
- expanding the female thread formed in the interior of the fastening object in the width direction by increasing the fastening area can further improve the fastening force of the tapping screw and reduce the fastening torque.
- the tapping screw 100 having improved fastening force of the present invention can prevent the tapping screw from being released from the fastening object as the fastening area of the fastening object is increased by the fastening screw thread formed to have a relatively large width.
- FIG. 5 is a view showing a tapping screw according to a further embodiment of the present invention
- Figure 6 is an enlarged view showing a part of the tapping screw shown in FIG.
- tapping screw 200 according to a further embodiment of the present invention will be described with reference to points different from the above-described embodiment or added based on the above-described embodiment.
- the tapping screw 200 includes a head 110 and a body in which one end portion is in contact with the head 110 but a plurality of threads 130 are provided on an outer circumferential surface thereof. It may include wealth.
- the same reference numerals are given, and the description thereof will apply mutatis mutandis to the above-described embodiments.
- a plurality of threads 230 may be provided in the body 120 illustrated in FIGS. 5 and 6.
- the plurality of threads 230 are inclined from the symmetrical screw thread 231, the first flank surface 234, 234 'and the second flank surface 235, 235' has a different inclination and the screw thread 230
- First flank angle ⁇ ie, the angle formed by the first flank plane, which is the flank face toward the other end of the body portion, and a vertical line L with respect to the axis of the body portion
- the second flank angle ⁇ is formed differently or has an asymmetrical shape having different sizes.
- any one pair of threads 230 of the threads facing each other may be formed as an asymmetric screw thread 233, 233 ′.
- the asymmetrical screw thread 233, 233 ' is provided at a position spanning the fastening portion 124 and the completion portion 126 of the body portion 120 or the position of the completion portion, and to be located in the opposite direction Can be. Accordingly, when the tapping screw 200 is fastened to the fastening object 101, the asymmetrical screw threads 233 and 233 ′ provided in the facing direction may be fastened while pushing the fastening object 101.
- the asymmetrical screw thread 233 located relatively to the fastening direction of the tapping screw 200 is inclined toward the direction of travel of the tapping screw 200.
- the asymmetrical screw thread 233 ′ which is formed to be positioned in a forward direction relative to the fastening direction of the tapping screw 200 may be inclined toward the opposite direction of the fastening direction of the tapping screw 200.
- the second flank surface 235 is slower than the first flank surface 234. It may be formed to have one slope. As formed in this way, a stress ⁇ may be concentrated between the first flank 234 having a steep slope and the fastening object 101.
- the transition part 240 may be formed at a portion where the cross section meets.
- the first flank 234 ' has a second flank (asymmetrical screw thread 233' located relatively forward with respect to the fastening direction of the tapping screw 200).
- 235 ') may have a gentler slope.
- a stress ⁇ may be concentrated between the second flank 235 ′ having a steep slope and the fastening target 101.
- a transition part 240' is formed at a portion where the lower end of the second flank 235 'having a steep inclination and the body part 20 meet. Can be.
- a planar surface having a steep slope as the threads 230 are formed so that the asymmetrical screw threads 233, 233 'facing each other are inclined toward each other. Since the stress? Applied to the fastening object 101 acts in a direction facing each other, the tapping screw 200 can be more effectively prevented from being released from the fastening object 101.
- the anti-loosening tapping screw (100, 200) of the present invention it is possible to reduce the defective rate that may occur during the rolling process to form a thread due to the transition portion is formed.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Connection Of Plates (AREA)
Abstract
Description
Claims (10)
- 머리부; 및일단부가 상기 머리부와 연결되되, 외주면에 복수 개의 나사산이 마련되는 몸체부;를 포함하고,상기 복수 개의 나사산은 상기 몸체부의 길이방향 전체에서 또는 상기 몸체부의 길이방향의 적어도 일정 구간 이상에서 다수 개의 체결나사산을 포함하며,상기 다수 개의 체결나사산은, 상기 체결나사산의 너비가 상기 몸체부의 타단부에서 상기 몸체부의 일단부로 갈수록 증가되도록 형성되는 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제1항에 있어서,상기 체결나사산은, 상기 몸체부의 타단부 쪽을 향하는 플랭크면인 제1 플랭크면과, 상기 몸체부의 일단부 쪽을 향하는 플랭크면인 제2 플랭크면을 포함하고상기 다수 개의 체결나사산 각각은, 상기 제1 플랭크면과 상기 몸체부의 축선이 형성하는 제1 플랭크 측면 각도가 상기 몸체부의 타단부에서 상기 몸체부의 일단부로 갈수록 감소되도록 그리고 상기 제2 플랭크면과 상기 몸체부의 축선이 형성하는 제2 플랭크 측면 각도가 상기 몸체부의 타단부에서 상기 몸체부의 일단부까지 동일하도록 형성되는 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제1항에 있어서,상기 다수 개의 체결나사산은 모두 동일한 나사산 높이를 가지는 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제1항에 있어서,상기 몸체부는 상기 몸체부의 타단부에서부터 상기 몸체부의 일단부 방향으로 순차적으로 마련된 도입부, 체결부 및 완료부를 포함하고,상기 다수 개의 체결나사산은 상기 체결부에 또는 상기 체결부 및 상기 완료부에 형성되는 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제4항에 있어서,상기 도입부의 외주면에는, 상기 체결나사산의 높이보다 큰 높이 및 상기 체결나사산의 너비보다 작은 너비를 가지는 적어도 하나 이상의 절개나사산이 구비되는 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제5항에 있어서,상기 절개나사산과 상기 체결나사산 사이의 피치 및 상기 체결나사산과 인접한 다른 체결나사산 사이의 피치는 상기 몸체부의 타단부에서 상기 몸체부의 일단부로 갈수록 증가되는 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제5항에 있어서,상기 절개나사산은 단면이 직선인 플랭크면을 가지고,상기 체결나사산은 단면이 곡선인 플랭크면을 가지도록 형성되는 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제4항에 있어서,상기 복수 개의 나사산은, 상기 몸체부의 타단부 쪽을 향하는 플랭크면인 제1 플랭크면과 상기 몸체부의 축선에 대한 수직선이 형성하는 제1 플랭크각과, 상기 몸체부의 일단부 쪽을 향하는 플랭크면인 제2 플랭크면과 상기 몸체부의 축선에 대한 수직선이 형성하는 제2 플랭크각을 포함하고,상기 다수 개의 체결나사산은 상기 제1 플랭크각이 상기 제2 플랭크각 이상인 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제8항에 있어서,상기 완료부의 외주면에는, 상기 제1 플랭크각이 상기 제2 플랭크각보다 작은 적어도 하나 이상의 비대칭 나사산이 구비되는 것을 특징으로 하는 체결력이 향상된 태핑나사.
- 제9항에 있어서,상기 비대칭 나사산 및 상기 다수 개의 체결나사산 중 상기 비대칭 나사산과 마주하는 최후단 체결나사산 중 적어도 하나 이상의 나사산은, 나사산과 상기 몸체부가 만나는 부분에서 제1 플랭크면 또는 제2 플랭크면보다 완만한 각도로 형성된 전이부를 구비하는 것을 특징으로 하는 체결력이 향상된 태핑나사.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020167007382A KR101675471B1 (ko) | 2016-03-17 | 2016-03-17 | 체결력이 향상된 태핑나사 |
PCT/KR2016/002735 WO2017159898A1 (ko) | 2016-03-17 | 2016-03-17 | 체결력이 향상된 태핑나사 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/KR2016/002735 WO2017159898A1 (ko) | 2016-03-17 | 2016-03-17 | 체결력이 향상된 태핑나사 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017159898A1 true WO2017159898A1 (ko) | 2017-09-21 |
Family
ID=57527832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2016/002735 WO2017159898A1 (ko) | 2016-03-17 | 2016-03-17 | 체결력이 향상된 태핑나사 |
Country Status (2)
Country | Link |
---|---|
KR (1) | KR101675471B1 (ko) |
WO (1) | WO2017159898A1 (ko) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102060581B1 (ko) | 2017-03-30 | 2019-12-30 | 주식회사 서울금속 | 체결력 및 풀림방지력이 개선된 태핑 스크류 |
KR102198192B1 (ko) * | 2018-11-30 | 2021-01-04 | 주식회사 이클레틱 | 치과용 임플란트 픽스쳐 |
AU2022460226A1 (en) * | 2022-05-26 | 2024-10-31 | Howmet Aerospace Inc. | Fastener with tool-guiding tail |
KR102708303B1 (ko) * | 2022-09-06 | 2024-09-23 | 주식회사 진광기술 | 중공 슬래브 타설용 이중 스크류 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5340254A (en) * | 1992-01-31 | 1994-08-23 | Textron Inc. | Thread forming screw for forming an internal thread in a low ductility material |
JP2001099122A (ja) * | 1999-08-13 | 2001-04-10 | Hilti Ag | ねじアンカー |
JP2012526931A (ja) * | 2009-05-12 | 2012-11-01 | ヴァルレック・マンネスマン・オイル・アンド・ガス・フランス | 炭化水素井戸の掘削と運転のためのねじ付き接続構造を作るためのセットおよびそのねじ付き接続構造 |
KR20130133060A (ko) * | 2011-04-28 | 2013-12-05 | 닛또 세이꼬 가부시키가이샤 | 탭핑나사 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0642515A (ja) * | 1992-01-27 | 1994-02-15 | Seiichiro Takasaki | ね じ |
JPH0718016U (ja) * | 1993-08-31 | 1995-03-31 | 若井産業株式会社 | ね じ |
JPH081340U (ja) * | 1996-02-09 | 1996-09-03 | 日東精工株式会社 | タッピンねじ |
JP3487210B2 (ja) * | 1999-03-16 | 2004-01-13 | マックス株式会社 | ネジ及びネジの締結方法 |
-
2016
- 2016-03-17 WO PCT/KR2016/002735 patent/WO2017159898A1/ko active Application Filing
- 2016-03-17 KR KR1020167007382A patent/KR101675471B1/ko active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5340254A (en) * | 1992-01-31 | 1994-08-23 | Textron Inc. | Thread forming screw for forming an internal thread in a low ductility material |
JP2001099122A (ja) * | 1999-08-13 | 2001-04-10 | Hilti Ag | ねじアンカー |
JP2012526931A (ja) * | 2009-05-12 | 2012-11-01 | ヴァルレック・マンネスマン・オイル・アンド・ガス・フランス | 炭化水素井戸の掘削と運転のためのねじ付き接続構造を作るためのセットおよびそのねじ付き接続構造 |
KR20130133060A (ko) * | 2011-04-28 | 2013-12-05 | 닛또 세이꼬 가부시키가이샤 | 탭핑나사 |
Also Published As
Publication number | Publication date |
---|---|
KR101675471B1 (ko) | 2016-11-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017159898A1 (ko) | 체결력이 향상된 태핑나사 | |
EP2756814A3 (en) | Distal tibia plating system | |
WO2015170896A1 (ko) | 나선철근용 철근연결구 | |
BR112014004432B1 (pt) | Acionador de transmissão de torque, sistema de prendedor, e, seleção de uma pluralidade de prendedores | |
AU2003217729A1 (en) | Distraction pin for fracture fixation | |
CN210838749U (zh) | 一种高压电缆用的夹具 | |
WO2013105751A1 (ko) | 풀림방지 너트 및 그 제조방법 | |
US20140023457A1 (en) | Masonry screws | |
WO2019190116A1 (ko) | 풀림방지 너트 | |
WO2016144132A1 (ko) | 건축용 석재 고정장치 | |
WO2009102137A2 (ko) | 호스체결용 클램프 | |
WO2019054627A1 (ko) | 철근 이음용 커플러 제작방법 | |
WO1991014893A1 (en) | Screw and screw releasable strain relief bushing with a non-fall out screw | |
WO2023277424A1 (ko) | 축선보정 나사체결구 | |
WO2011132859A2 (ko) | 내충격, 내진동 및 체결력 강화 구조를 갖는 나사 및 나사식 기계요소 | |
WO2016064118A1 (ko) | 관 연결 소켓 | |
WO2012008801A2 (en) | Threaded engagement device | |
WO2014200233A1 (ko) | 종골 플레이트 및 종골 플레이트 시스템 | |
US6619898B1 (en) | Fastener/deflectable retaining ring assembly | |
WO2012161506A2 (ko) | 나사전조탭 | |
WO2013009004A1 (ko) | 풀림방지 너트 | |
WO2011132844A1 (ko) | 포스트 스크루 및 그를 제거하기 위한 포스트 스크루용 리무버 드라이버 | |
US10288105B2 (en) | Bolt | |
WO2015041398A1 (ko) | 본 플레이트 시스템 | |
WO2017159897A1 (ko) | 체결 대상물의 소재변형률을 최소화할 수 있는 태핑나사 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 1020167007382 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16894629 Country of ref document: EP Kind code of ref document: A1 |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 23.01.2019) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16894629 Country of ref document: EP Kind code of ref document: A1 |