JP3048413U - Fastener - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] The thread roots of the bolts and nuts used in aircraft and the like have a triangular vertex shape.
Cracks break along with the screw thread of the bolt due to the vibration of the engine etc.
Along cracks it is to overcome the engagement on the disadvantage of causing the cracking nuts enter is. [Structure] By using the bolts and nuts described in the description of 0005 and 0007 for an aircraft or the like, even if the vibration of the engine is faced, the thread valleys of the bolt (male thread) and the nut (female thread) are trapezoidal and thread valley. Since the corners (corners) of the parts are rounded, it is possible to prevent cracks at the thread roots of the bolt (male screw) and nut (female screw).

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to fasteners for bolts and nuts for fixing industrial parts and members.

[0002]

[Prior art]

 The conventional screw has rounded corners at the peaks and valleys of the male screw 2 and the valley of the female screw 4 in FIG. 1A, and the peak of the female screw 4 is slightly trapezoidal. Parts and members such as machines and equipment are assembled and tightened with bolts (male screws) and nuts (female screws) of this shape, and these screws are commonly used in aerospace and automobiles, and are used in precision machinery. Was also used.

[0003]

[Problems to be solved by the invention]

 However, the conventional screw used in this way is a male screw with a triangular screw thread and valley and a hexagonal head (bolts and nuts) or a cross-shaped groove or a minus (-) slot. A male screw with a hexagonal depression in the head is good for static loads, but it is good for aircraft (bolts and nuts for fixing the engine to the fuselage or bolts for fixing various parts of the engine and axle parts) And a cross-shaped male screw with a cross-shaped groove on the head used to connect the duralumin plate and the duralumin plate of the fuselage to the body and the duralumin plate. For running bolts and nuts, bolts and nuts for fixing various parts of the engine and axle parts, bridge girders (bolts and nuts for connecting bridge girders and bridge girders), and locomotives. When used on rails (bolts that fasten sleepers and rails) that are mounted directly on sleepers that are installed at appropriate intervals, vibrations cause cracks in the roots of the screw threads of the bolts, and the bolts (male screws) are cut A crack was formed in the thread root of the female thread, and the nut (female thread) was cracked.

[0004]

Means for Solving the Problems (1) It is an object of the present invention to eliminate such inconveniences and to provide a durable and long-lasting fastener which prevents cracks at the thread roots of the threads of the fastener. For example, in FIG. 1, a threaded bolt and a female screw 4 having a trapezoidal root 3 a of the male thread 2, rounded 3 b at both corners, and a threaded peak 3 c at the top of a triangle with a rounded tip 3 d. The valley portion is a triangular vertex 5a, the vertex is rounded 5b, the female thread crest 5c is trapezoidal, and both corners 5d are rounded to enable screwing with a threaded nut. For example, the roundness of the thread valleys or the corners of the thread of the bolt and the nut is not rounded at both corners 3b of the bolt valley 3a and both corners 5d of the nut ridge 5c of FIG. (Even though bolts and nuts or male and female threads can be made, the quality is poor.) For use, Fig. 1 of the present invention, screws and bolts and nuts and washers are used to fasten each part or member. Use. At this time, since the root of the male screw is trapezoidal and rounded, cracks are less likely to occur in the root of the screw thread of the bolt, preventing the bolt from being cut and extending the life of the screw. In the case of using the threads of (b), (c) and (d), first draw a line between the male screw (2) and the thread (2) of FIG. Figure 1, b, the bottom of the male thread is deeper, the thread of the female thread is deeper, the thread of the female thread is higher, and the thread and the female thread of the female thread are slightly rounded. A screw with a combination of a bolt (male) and a nut (female) with a triangular valley can be made. Next, one line is drawn out between the outer thread 2 and the outer thread 2 of FIG. 1 (a). Figure 1 (1) C thread valleys have medium depth, female thread ridges have medium height, and male thread ridges and female thread valleys have triangular bolts ( A combination screw (male screw) and nut (female screw) can be made (standard). Next, a line is drawn out between the ends of the external thread 2 in Fig. 1 (a). A line is drawn out between the ends of the next internal thread 4 (the corners of the threads and the thread roots of the male and female threads are slightly small. Figure 1 D. The depth of the male thread is shallow, the height of the female screw is low, and the height of the female thread and the female thread are triangular with the triangular bolt (male) and nut (female). Can be combined. (2) Then, for example, the root 8a of the male screw 7 shown in FIG. 5C is trapezoidal and both corners 8c are rounded, and the male screw peak 8b is trapezoidal and both corners 8d are rounded. It is possible to screw a bolt and a thread nut having a trapezoidal root 10a of the female screw 9 with rounded corners 10c and a crested female thread 10b with rounded corners 10d. It is a combination. (And both corners 8d of the thread portion 8b of the male thread, both corners 10d of the thread portion 10b of the female thread, and both corners 8c of the thread root portion 8a of the male screw and the thread root portion 10a of the female thread in FIG. Even if the corners 10c are not rounded, the bolt (male thread) and nut (female thread) can be formed, but the quality will be deteriorated.) In use, the bolt and nut of FIG. Use a cross-head screw, a minus screw with a minus (-) in the head, or a hexagonal bolt with a hexagonal recess in the head and screwed and fastened to each component or member. At this time, the ridges and valleys of the male and female threads are trapezoidal and rounded, so that the valleys of the thread of the bolt (male) and nut (female) are less likely to crack, and the bolt and nut last longer. When the conventional thread shown in FIG. 5 and FIG. 5A is changed to the thread shown in FIG. 5, for example, the thread shown in FIG. Draw a line between the thread valley between the female thread and the thread valley between the female thread and the thread (the corners of the thread and the thread valley of the male and female threads are slightly rounded. Figure 7 (b) Screws with a combination of a male screw and a female screw with a high thread part and a deep screw root (male screw) and a nut (female screw) can be made. Next, a line is drawn between the thread portion of the male screw 7 and the thread portion of the female screw 9 and the gap between the thread root portion of the female thread and the thread root portion of the male screw. And the corners of the threads and the valleys of the male and female threads are slightly rounded.) Figure 7, Medium height of the thread and middle of the thread valley A screw with a combination of a bolt (male thread) and nut (female thread) with a depth (specified as a standard) can be made. Next, a line is drawn between the threaded portion of the male screw 7 and the threaded portion of the female screw 9 and the gap between the threaded portion of the female thread and the threaded portion of the male thread. Fig. 5 (d) The threads of the male and female threads are low and the thread of the female thread is low and the thread is shallow. The screw of the combination of the bolt (male thread) and nut (female thread) Regardless of the height of the thread or the trapezoidal thread with a deep thread valley to the trapezoidal thread with a low thread or a shallow valley, the angle of the thread is not limited to the conventional 45 °, but is about 5 °. From a trapezoidal screw with an angle of about 120 ° to a trapezoidal (trapezoidal) screw with an angle of about 120 °. Production of resin screws and various alloy screws using a trapezoidal screw mold and mass production is possible if the necessary tools (for example, rolling dies, taps and bits) are prepared for rolling or cutting. . It is an object of the present invention to commercialize the above-mentioned bolt (male screw) and nut (female screw).

[0005]

【Example】

 FIG. 1E shows the whole fastener (the figure shows the case of a hexagon bolt and a hexagon nut), and 2 is a bolt composed of a head 2a and a main body 2b, and the trough 3a of FIG. A rounded portion 3b is provided on the main body 2b, and a suitable pitch male screw 3 having a peaked portion 3c and a rounded end 3d is provided on the body 2b. Numeral 4 denotes a nut having a valley 5a as a mountain, a rounded portion 5b at the tip, a peak 5c as a trapezoid, a rounded portion 5d at a corner, and a female screw 5 of a suitable pitch, which can be screwed to the male screw 3. I have to.

A method of using a tap having a triangular thread at a crest and a trapezoidal thread at a trough. In use, fasten each part or member with the bolt 2 and nut 4 of the present invention and the normal washer 4a, set a drill on the drilling machine on the part or member, turn on the power supply, and rotate the drill to make a hole. Set the trapezoidal tap of the present invention on the tapping machine, turn on the power switch, turn the tap, cut the screw, and attach other parts and components with the washer 4a and the trapezoidal bolt 2. For example, drill a hole slightly larger than the diameter of a male screw (cross-head screw) having a cross head in the iron strip (K) shown in (a) and (b) of FIG. 4 and drill the cross in the strip (L). Drill a hole in accordance with the screw. Tap the size of the screw j that can be screwed in. Fig. 2a. Set b on the tapping machine, cut the female screw of the strip (L) by the method described above, and wash the washer (4a). ) Of the sash (K) Tighten the female screw of the insertion strip (L) with a cruciform screwdriver.) Also, when used in aircraft, locomotives, automobiles, bridge girder, etc. It is a durable, long-lasting and safe male screw or bolt for suppressing cracks in the part (3a).

[0007]

Embodiment 2 FIG. 5 and FIG. 5E show the entire fastener, 7 is a bolt composed of a head and a body, and FIG. 5 shows a valley 8a and a peak 8b having a trapezoidal shape. The main body is provided with a suitable pitch male screw 8 having roundnesses 8c and 8d at the corners of. Numeral 9 denotes a nut, which is provided with a female thread 10 of a suitable pitch having a trough 10a and a peak 10b in a trapezoidal shape and roundnesses 10c and 10d provided at the corners of the trough 10a and the peak 10b. It is possible.

[0008] A method of using a tap having the same trapezoidal thread at a crest and a trough. In use, bolts and nuts 9 of the present invention and normal washers 4a are used to fasten each part or member, set a drill on the drilling machine on the part or member, turn on the power supply, and rotate the drill to make a hole. Set the trapezoidal tap of the present invention on the tapping machine, turn on the power switch, turn the tap, cut the screw, and attach other parts and components with the washer 4a and trapezoidal bolt 7. . (For example, a hole slightly larger than the diameter of a male screw (cross-head screw) M having a cross head is drilled in the iron strip N shown in FIGS. Drill a hole in the cross screw with a screw, and set a tap of the size that can be screwed with the cross screw M, and set the female screw on the tapping plate as shown in Figs. Insert it into the hole of the strip N and fasten it to the female screw of the strip P with a crucifix screwdriver.) Also, when used for aircraft, locomotives, automobiles, bridge girders, etc. The valley 8a and the roundness 8c and the valley 10a and the roundness 10c of the nut or the female thread are used to hold the crack of the valley 8a of the bolt 7 or the male screw and the valley 8a of the nut 9 or the female thread 10a, so that it is strong and long-lasting. Secure external and internal threads It is a Iwabo belt and nut.

[0009]

[Effects of the Invention] As described above, the present invention uses a bolt, nut or male screw by making the valley of the male screw or female screw into a trapezoid (trapezoidal shape) and making the corners round so that cracks are less likely to occur. When female screws are used for aircraft, locomotives, automobiles, bridge girders, etc., cracks do not enter the valleys of bolts or male screws (Fig. 1, e) due to vibration. In addition, it is economical and long-lasting because it does not crack into the valleys of bolts and nuts or male and female threads (Fig. 5, E). It is.

[Submission date] April 28, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents] [Detailed description of the invention]

[0001] The present invention relates to fasteners for bolts and nuts for fixing industrial parts and members.

2. Description of the Related Art Conventionally, a conventional screw has a rounded triangular apex of a ridge and a valley of a male screw 2 and a valley of a female screw 4 of FIG. The peaks are slightly trapezoidal, and parts and members such as machines and equipment are assembled and tightened with bolts (male screws) and nuts (female screws) of this shape, and these screws are commonly used in airplanes and automobiles. Used for precision machines.

[0003]

[Problems to be solved by the invention]

However, the conventional screw used in this way is a male screw with a triangular screw thread and valley and a hexagonal head (bolts and nuts) or a cross-shaped groove or a minus (-) slot. A male screw with a hexagonal depression in the head is good for static loads, but it is good for aircraft (bolts and nuts for fixing the engine to the fuselage or bolts for fixing various parts of the engine and axle parts) It fixes the cross male thread) and automobile and heavy equipment (engine on the vehicle body Toka heavy equipment body having a head in a cross of the groove to be used in the nut Toka duralumin plate with di Yurarumin plate the following Nag 0006 and 0008 method for aircraft Bolts and nuts, or bolts and nuts for fixing various parts of the engine and axle parts), bridge girders (bolts and nuts for connecting bridge girders and bridge girders), and running locomotives When used on rails (bolts that fix sleepers and rails) mounted on sleepers that are installed at appropriate intervals, bolts (male screws) break in the roots of the screw threads of the bolts due to vibration. Was cut, and a crack occurred in the root of the female screw thread, causing the nut (female screw) to crack and felt inconvenience in fastening.

[Means for Solving the Problems] (1) The present invention is to solve such inconveniences, and to provide a durable and long-lasting fastener which prevents a crack in a thread root of a thread of the fastener. . For example, in FIG. 1, a threaded bolt and a female screw 4 having a trapezoidal root 3 a of the male thread 2, rounded 3 b at both corners, and a threaded peak 3 c at the top of a triangle with a rounded tip 3 d. The valley portion is a triangular vertex 5a, the vertex is rounded 5b, the female thread crest 5c is trapezoidal, and both corners 5d are rounded to enable screwing with a threaded nut. For example, the roundness of the thread valleys or the corners of the thread of the bolt and the nut is not rounded at both corners 3b of the bolt valley 3a and both corners 5d of the nut ridge 5c of FIG. (Even though bolts and nuts or male and female threads can be made, the quality is poor.) For use, Fig. 1 of the present invention, screws and bolts and nuts and washers are used to fasten each part or member. Use. At this time, since the root of the male screw is trapezoidal and rounded, cracks are less likely to occur in the root of the screw thread of the bolt, preventing the bolt from being cut and extending the life of the screw. In the case of using the threads of (b), (c) and (d), first draw a line between the male screw (2) and the thread (2) of FIG. Figure 1, b, the bottom of the male thread is deeper, the thread of the female thread is deeper, the thread of the female thread is higher, and the thread and the female thread of the female thread are slightly rounded. A screw with a combination of a bolt (male) and a nut (female) with a triangular valley can be made. The hand of the following Figure 1 Inooneji 2 - later following the internal thread 4 issues an line between the - one between out a line (all thread ridges and thread valley of the corner of mantra external thread and the internal thread slightly Figure 1 (1) C thread valleys have medium depth, female thread ridges have medium height, and male thread ridges and female thread valleys have triangular bolts ( A combination screw (male screw) and nut (female screw) can be made (standard). Next, a line is drawn out between the ends of the external thread 2 in Fig. 1 (a). A line is drawn out between the ends of the next internal thread 4 (the corners of the threads and the thread roots of the male and female threads are slightly small. Figure 1 D. The depth of the male thread is shallow, the height of the female screw is low, and the height of the female thread and the female thread are triangular with the triangular bolt (male) and nut (female). Can be combined. (2) Then, for example, the root 8a of the male screw 7 shown in FIG. 5C is trapezoidal and both corners 8c are rounded, and the male screw peak 8b is trapezoidal and both corners 8d are rounded. It is possible to screw a bolt and a thread nut having a trapezoidal root 10a of the female screw 9 with rounded corners 10c and a crested female thread 10b with rounded corners 10d. It is a combination. (And both corners 8d of the thread portion 8b of the male thread, both corners 10d of the thread portion 10b of the female thread, and both corners 8c of the thread root portion 8a of the male screw and the thread root portion 10a of the female thread in FIG. Even if the corners 10c are not rounded, the bolt (male thread) and nut (female thread) can be formed, but the quality will be deteriorated.) In use, the bolt and nut of FIG. Use a cross-head screw, a minus screw with a minus (-) in the head, or a hexagonal bolt with a hexagonal recess in the head and screwed and fastened to each component or member. At this time, the ridges and valleys of the male and female threads are trapezoidal and rounded, so that the valleys of the thread of the bolt (male) and nut (female) are less likely to crack, and the bolt and nut last longer. When the conventional thread shown in FIG. 5 and FIG. 5A is changed to the thread shown in FIG. 5, for example, the thread shown in FIG. Draw a line between the thread valley between the female thread and the thread valley between the female thread and the thread (the corners of the thread and the thread valley of the male and female threads are slightly rounded. Figure 7 (b) Screws with a combination of a male screw and a female screw with a high thread part and a deep screw root (male screw) and a nut (female screw) can be made. Next, a line is drawn between the thread portion of the male screw 7 and the thread portion of the female screw 9 and the gap between the thread root portion of the female thread and the thread root portion of the male screw. And the corners of the threads and the valleys of the male and female threads are slightly rounded.) Figure 7, Medium height of the thread and middle of the thread valley A screw with a combination of a bolt (male thread) and nut (female thread) with a depth (specified as a standard) can be made. Next, a line is drawn between the threaded portion of the male screw 7 and the threaded portion of the female screw 9 and the gap between the threaded portion of the female thread and the threaded portion of the male thread. Fig. 5 (d) The threads of the male and female threads are low and the thread of the female thread is low and the thread is shallow. The screw of the combination of the bolt (male thread) and nut (female thread) Regardless of the height of the thread or the trapezoidal thread with a deep thread valley to the trapezoidal thread with a low thread or a shallow valley, the angle of the thread is not limited to the conventional 45 °, but is about 5 °. From a trapezoidal screw with an angle of about 120 ° to a trapezoidal (trapezoidal) screw with an angle of about 120 °. Production of resin screws and various alloy screws using a trapezoidal screw mold and mass production is possible if the necessary tools (for example, rolling dies, taps and bits) are prepared for rolling or cutting. . It is an object of the present invention to commercialize the above-mentioned bolt (male screw) and nut (female screw).

Example 1 FIG. 1E shows an entire fastener (the figure shows a case of a hexagon bolt and a hexagon nut), and 2 denotes a bolt composed of a head 2a and a main body 2b, and FIG. The valley 3a is trapezoidal, the corners are rounded 3b, and the main body 2b is provided with a suitable pitch male screw 3 having a ridge 3c and a rounded 3d at the tip. Reference numeral 4 denotes a nut, which is provided with a female thread 5 of a suitable pitch having a valley section, a peak 5a, a rounded section 5b at the tip, a peak section 5c having a trapezoidal shape, and a rounded section 5d provided at the corner thereof. It can be screwed.

A method of using a tap having a triangular thread at a crest and a trapezoidal thread at a trough. In use, fasten each part or member with the bolt 2 and nut 4 of the present invention and the normal washer 4a, set a drill on the drilling machine on the part or member, turn on the power supply, and rotate the drill to make a hole. Set the trapezoidal tap of the present invention on the tapping board, turn on the power switch, turn the tap, cut the screw, and attach other parts and components with the washer 4a and the trapezoidal bolt 2 . For example, drill a hole slightly larger than the diameter of a male screw (cross-head screw) having a cross head in the iron strip (K) shown in (a) and (b) of FIG. 4 and drill in the strip (L). Drill a hole in the cruciform screw and tap the size of the cross screw j that can be screwed in. Fig. 2a. Set the b on the tapping machine, cut the female screw on the strip (L) by the above method, and wash the washer ( 4a) Inset strip (K) (If it is used for an aircraft, a locomotive, a car or a bridge girder, etc.), the bolt (2) is formed by the valley 3a and the roundness 3b of the bolt. ) Is a durable, long-lasting and safe male screw or bolt for suppressing cracks in the valley (3a).

[Embodiment 2] FIG. 5 and FIG. 5E show the whole fastener, and 7 is a bolt composed of a head and a main body, and FIG. The rounded portions 8c and 8d are provided at the corners of the peak portion 8b, and the external thread 8 having an appropriate pitch is provided on the main body. Numeral 9 is a nut, and the trough 10a and the crest 10b are trapezoidal, and the troughs 10a and the crest 10b are provided with roundnesses 10c and 10d at the corners thereof. It is possible.

[0008] A method of using a tap having the same trapezoidal thread at a crest and a trough. In use, the parts and members are fastened with bolts 7 and nuts 9 of the present invention and ordinary washers 4a , and a drill is set in the drilling machine for the parts and members, a power switch is turned on, and the drill is turned. Then, set the trapezoidal tap of the present invention on the tapping board, turn on the power switch, turn the tap, cut the thread, and attach other parts and members with the washer 4a and the trapezoidal bolt 7. . (E.g. Lee 8, drilled slightly larger than the diameter of the male thread (cross screw) M having a cross head at the drill strip N of iron by the above method shown in (b), similarly to the strip P Drill a hole in the cross screw (a hole with a diameter from the screw root to the screw root ) , and set the tap of the size to which the cross screw M can be screwed. Cut the female screw on the belt plate P with a screw, and insert the washer 4a into the cross screw, insert it into the hole in the belt plate N, and fasten it with the cross screwdriver to the female screw on the belt plate P.) Also, aircraft, locomotives and vehicles or when diagram used in bridge deck or the like 5, bolt valleys 8a and rounded 8c and nut or internal thread of the valley portion 10a and a rounded 10c bolt 7 or the external thread valleys 8a and a nut 9 or the internal thread indicated by c Strong to suppress cracks in the valley 10a Long-lasting male and female threads or bolts and nuts.

[Effects of the Invention] As described above, the present invention is based on the fact that the valley of a male screw or a female screw is trapezoidal (trapezoidal) and its corners are rounded to make it difficult for cracks to occur, thereby improving the bolts and nuts. Alternatively, when the male and female screws are used in an aircraft, locomotive, automobile, bridge girder, etc., no cracks are formed in the valleys of bolts or male screws (Fig. 1, e) due to the vibration. In addition, it is economical and long-lasting because it does not crack into the valleys of bolts and nuts or male and female threads (Fig. 5, E). It is.

[Submission date] May 23, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents] [Detailed description of the invention]

[0001] The present invention relates to fasteners for bolts and nuts for fixing industrial parts and members.

[0002] [Prior Art] screws with conventionally is provided with a rounded apex of FIG. 1 b, the male screw 2, the thread crests and the thread valley and the female thread 4 screws valley triangular internal thread 4 screws crest is a little a trapezoidal bolt of this shape (external thread) and the nut (female thread) and or clamping assembled parts products and members such as mechanical or facilities in the screw aircraft and automobiles It was commonly used and also used for precision instruments.

[0003]

[Problems to be solved by the invention]

However Toka screw of the screw crest and the screw valley head in the triangle type of screw is hexagonal bolts or of the cross grooves of the past that have been used in this manner - (minus) the groove of there you screw of and, A male screw with a hexagonal dent on the head is good for static load, but it is good for aircraft (bolts and nuts for fixing the engine to the fuselage or bolts and nuts for fixing various parts of the engine and axle parts, etc. A cross-shaped male screw with a cross-shaped groove on the head used in the method of 0006 and 0008 to connect the duralumin plate to each other, and a car and heavy equipment (bolts and nuts for fixing the engine to the body or the body of the heavy equipment) Or, bolts and nuts for fixing various parts of the engine and the vehicle, and bridge girder (bolts and nuts for connecting the bridge girder and bridge girder), and the proper spacing for running the locomotive Installed rail topped to direct over the sleepers (to affix the sleepers and rails bolt and nut) cracked results of the bolt thread screw troughs by vibration when used in such as a bolt (male screw) is cut nut (female thread) is cracked along the internal thread of the threads of the screw valley or've been had felt the inconvenience to conclude on a non-normal caused the cracking.

[0004] [Means for Solving the Problems] (1) the present invention is to provide a fastener to be durable to prevent the threads of the screw valley crack of eliminating the fasteners such a disadvantage . For example, in FIG. 1, the root 3a of the male screw 2 has a trapezoidal shape, rounded corners 3b are provided at both corners thereof, and the crest 3c of the male screw is a vertex of a triangle. valleys of the screw crest 5c of the female screw provided round 5b and trapezoid vertex as the vertex 5a of the triangle is a combination which enables screwing between its two corners 5d threads having a rounded nut. (And the roundness of the thread roots of the bolts and nuts or the corners of the thread peaks is, for example, both corners 3b of the thread roots 3a of the bolt and both corners of the thread 5c of the nut in FIG. 1C. Even if there is no roundness of 5d, bolts and nuts or male and female screws can be made, but the quality will be poor . ) In use, Fig. 1 of the present invention, bolts and nuts of the invention and nuts and washers are screwed to each part or member. And use it. At this time, since the root of the male screw is trapezoidal and round, cracks are less likely to occur in the root of the screw thread of the bolt, preventing the bolt from being cut and prolonging its life . Note the threads, for example, FIG Yi in FIG. 1 in a conventional B, C, in the case of the two thread of the screw, initially Figure 1, the unexpected Inooneji 2 - Next Me put a line between I Figure 1 (b), where a straight line is drawn out between the screws 4 (all the corners of the thread and the valley of the male and female threads are slightly rounded). The thread of the combination of a bolt (male) and a nut (female) with a triangular female thread and a female thread valley with a deeper female thread crest is higher. Next, in Fig. 1 , a line is drawn between the top and the bottom of the male screw 2 and a line is drawn between the bottom of the next female screw 4 (the corners of the thread portion and the thread root portion of the male and female threads are all Figure 1 (c) is a bolt with a medium depth of the thread of the male thread and a medium height of the thread of the female thread, and a triangular bolt with the thread of the external thread and the thread of the female thread. A combination screw (male screw) and nut (female screw) is created (standard). Next, a line is drawn out between the ends of the thread 2 in FIG. 1A, and a line is drawn out between the ends of the next female screw 4 (the corners of the thread portion and the thread root portion of the male and female threads are Figure 1 (d) is slightly rounded. The bottom of the thread is shallow, the top of the female thread is low, and the top of the male thread and the bottom of the female thread are triangular. Screw) can be combined. (2) Then, for example, the root 8a of the male screw 7 shown in FIG. 5C is trapezoidal and both corners 8c are rounded, and the male screw peak 8b is trapezoidal and both corners 8d are rounded. It is possible to screw a bolt and a thread nut having a trapezoidal root 10a of the female screw 9 with rounded corners 10c and a crested female thread 10b with rounded corners 10d. It is a combination. (And both corners 8d of the thread portion 8b of the male thread, both corners 10d of the thread portion 10b of the female thread, and both corners 8c of the thread root portion 8a of the male screw and the thread root portion 10a of the female thread in FIG. Even if the corners 10c are not rounded, the bolt (male thread) and nut (female thread) can be formed, but the quality will be deteriorated.) In use, the bolt and nut of FIG. Use a cross head screw or a minus screw with a minus (-) in the head or a hexagonal bolt with a hexagonal recess in the head to fasten it to each part or member. At this time, the ridges and valleys of the male and female threads are trapezoidal and rounded, so that the valleys of the thread of the bolt (male) and nut (female) are less likely to crack, and the bolt and nut last longer. In the case where the conventional thread shown in FIG. 5 and FIG. 5A is changed to, for example, the thread shown in FIG. 5, the thread shown in FIG. A line is drawn out between the threads, and a line is drawn out between the thread root of the female thread and the thread root of the male thread and the thread of the female thread. Figure 7 (b) The thread of the male screw and the female screw is high and the screw of the combination of the bolt (male) and the nut (female) with the deep thread root can be made. Next, a line is drawn between the thread part of the male thread 7 and the thread part of the female thread 9 and the thread part of the female thread and the thread part of the external thread. All the threads of the male and female threads and the corners of the thread valleys are slightly rounded. Figure 7 shows the middle height of the thread and the middle of the thread valley. A screw with a combination of a bolt (male thread) and a nut (female thread) of a depth can be made. Then, a line is formed between the threaded portion of the male screw 7 and the threaded portion of the female screw 9, and the gap between the threaded portion of the female thread and the threaded portion of the male thread is removed. in issuing a clear distinction (mantra ridge Ji all internal thread of the screw crest and the screw valley of the corner and put a little by little rounded) was looking Figure 5, threaded portion of two of the male screw and the female screw is low Kunejitani part Screws with a combination of shallow bolts (male) and nuts (female) can be made. In the case of a combination of a male screw and a female screw, a male screw and a female screw type shown in Fig. 9 or a male screw 2 shown in Fig. 10 as shown in Fig. 10 with the thread root part extended by a free dimension, and a trapezoidal male screw are used. With the combination of the trapezoidal female screw, the male screw and female screw type shown in Fig. 11 or the type shown in Fig. 12 in which the thread part and the screw root part of Fig. 11 are stretched to the same size and free, and the male screw and female screw type in Fig. 13 As shown in FIG. 14, the thread portion and the thread root portion of FIG. 13 are extended by free dimension, and the thread portion and the thread portion of FIG. 15 are extended by free dimension. Regardless of the size of the screw, from the height of the thread or the trapezoidal thread with a deep thread valley to the thread with a low thread or a shallow trapezoidal thread with a thread angle of 60 degrees. from 5 ° position of the angle of the trapezoid screw but not limited to every 1 And 0 ° position of the angle of the trapezoid (trapezoidal) thread, suitably selected according to use. Production of resin screws and various alloy screws using a trapezoidal screw mold and mass production is possible if the necessary tools (for example, rolling dies, taps, and bits) for rolling or cutting are prepared. . It is an object of the present invention to commercialize the above-mentioned bolt (male screw) and nut (female screw).

Example 1 FIG. 1E shows an entire fastener (the figure shows a case of a hexagon bolt and a hexagon nut), and 2 is a bolt composed of a head 2a and a main body 2b. The main body 2b is provided with a suitable pitch male screw 3 having a valley 3a having a trapezoidal shape and a rounded portion 3b at the corner thereof, and a ridge 3c having a rounded shape and a rounded portion 3d at the tip. Numeral 4 denotes a nut having a valley 5a as a mountain, a rounded portion 5b at the tip, a peak 5c as a trapezoid, a rounded portion 5d at a corner, and a female screw 5 of a suitable pitch, which can be screwed to the male screw 3. I have to.

(A) A method of using a tap having a triangular thread at a crest and a trapezoidal thread at a trough. In use, fasten each part or member with the bolt 2 and nut 4 of the present invention and the normal washer 4a, set a drill on the drilling machine on the part or member, turn on the power supply, and rotate the drill to make a hole. Set the tap with the trapezoidal screw blade of the present invention on the tapping machine, turn on the power switch, rotate the tap, cut the thread, and attach other parts and members with the washer 4a and the trapezoidal screw bolt 2. For example, a hole slightly larger than the diameter of a male screw (cross screw) j having a cross head is drilled in an iron strip (K) shown in (a) and (b) of FIG. Use a drill to make a hole in the cross screw, tap the size of the cross screw j that can be screwed in, set the b on the tapping machine, cut the female screw on the strip (L) using the above method, and cut it into a cross screw. Put on the washer (4a) Strip Plug the hole in the saw strip (K) tightened to fix the cross drivers into the internal thread of the (L)) Also in the case bolts used in aircraft and locomotives and automobiles, or the bridge girder such as screws valleys 3a It is a durable, long-lasting and safe male screw or bolt for suppressing (preventing) a crack in the thread root (3a) of the bolt (2) with the roundness 3b. (B) How to use a dice with a triangular thread at the peak and a trapezoidal thread at the valley. Use the female screw (F) with the trapezoidal thread on the die body E and the triangular thread on the thread valley, as shown in Figs. Set the tool (trapezoidal die) for cutting the external thread on the lathe and cut the external thread (set the semi-finished product of the alloy faucet 11, on the lathe, and also use a bite and drill on the turning axis of the lathe and another one. After setting the dice on the rotating shaft (multi-axis), turn on the power of the lathe, rotate the rotating shaft of the byte and drill, and turn the outside of the male thread of the faucet 11, semi-finished product with a bite (water on the middle side). After roughing the cavity passing through the drill), the rotary shaft of the die is rotated to cut the male screw of the semi-finished product of the faucet 11 and finish the male screw Q.

[Embodiment 2] FIG. 5 and FIG. 5E show the entire fastener, and 7 is a bolt composed of a head and a main body. FIG. 5 shows a valley 8a and a valley 8b having a trapezoidal shape. The rounded portions 8c and 8d are provided in the ridge portion 8b, and the externally threaded screw 8 having an appropriate pitch is provided on the main body . Numeral 9 denotes a nut, and the trough 10a and the crest 10b are formed in a trapezoidal shape, and the troughs 10a and the crest 10b are provided with roundnesses 10c and 10d at the corners thereof. It is possible.

(A) A method of using a tap having the same trapezoidal thread at the thread part and the thread root part. In use, bolts and nuts 9 of the present invention and ordinary washers 4a are used to fasten each part or member, or to set a drill on the drilling machine, turn on the power supply and rotate the drill to make a hole. Set the tap with the trapezoidal screw blade of the present invention on the tapping machine, turn on the power switch, turn the tap, cut the thread, and attach other parts and members with the washer 4a and the trapezoidal screw bolt 7. Or (For example, a hole slightly larger than the diameter of the male screw (cross screw) M having a cross head is drilled in the iron strip N shown in (a) and (b) in FIG. Drill a hole (from the thread root to the diameter of the thread root) with the cross screw and tap the size of the cross screw M that can be screwed. A female screw is cut into the plate P, and a washer 4a is inserted into the cross screw and inserted into the hole of the band plate N, and tightened and fixed to the female screw of the band plate P with a cross driver.) Also, aircraft, locomotives, automobiles, bridge girders, etc. If Figure 5, the bolt of the screw troughs 8a and rounded 8 c and the screw troughs 8a of the bolt 7 or the external thread by the thread troughs 10a and rounded 10c of the nut or female screw and the nut 9 or because shown by c used for Press the crack in the thread root 10a of the screw Strong and long lasting male and female threads or bolts and nuts to support (prevent) . (B) How to use a die that has the same trapezoidal thread at the thread part and thread root part. The tool used to cut the male thread using the female thread H with the thread portion and the thread root of the die body G having the shape shown in FIGS. Set a trapezoidal die on a lathe and cut an external thread (set the semi-finished product of the alloy faucet 11) on the lathe, set a bite and drill on the turning axis of the lathe, and set a die on the other turning axis. After turning on the power of the lathe (multi-axis), rotate the turning shaft of the bite and drill and rotate the turning shaft of the tap 11 with the bite on the outside of the male screw part of the semi-finished product of the faucet. After the rough cutting, the rotary shaft of the die is rotated to cut the male screw of the semi-finished product of the faucet 11 to finish the male screw R.

[Effects of the Invention] As described above, the present invention is based on the fact that the valley of a male screw or a female screw is formed in a trapezoidal shape (trapezoidal shape), and the corners thereof are rounded so that cracks are less likely to occur. or ridge Ji and bolts Installing by an internal thread to vibration when used in aircraft and locomotive and car or bridge beam or the like and the nut or external thread and the internal thread of the screw (Figure 1, e) the crack does not enter the valley of, In addition, a strong and long-lasting fastener that does not crack in the valleys of bolts and nuts or male and female threads (E in FIG. 5) can be made, which is economical and extremely excellent in practical use.

[Brief description of the drawings]

FIG. 1A is an enlarged cross-sectional view of a screw engagement portion according to the first embodiment of the present invention. FIG. 2B is an enlarged cross-sectional view of the screw engagement portion of the first embodiment. FIG. 3C is an enlarged cross-sectional view of the screw engagement portion of the first embodiment. FIG. 3D is an enlarged cross-sectional view of the screw engagement portion of the first embodiment. (E) It is a side view of the bolt, the washer and the nut of the first embodiment of the present invention.

FIG. 2A is a side view of the tap having a thread on the male thread side of FIG. 1C according to the present invention; (B) FIG. 2 is a front view of a tap having a thread on the male thread side of FIG.

3A is a cross-sectional view of the die of the present invention in which the thread has a female thread side blade of FIG. (B) FIG. 2 is a perspective view of a dice having the female screw side blade of FIG.

FIG. 4 is a perspective view of a method of attaching a cross screw described in (a) 0006a. (B) A washer 4a is fitted on the cross screw described in 0006a, and a FIG. 4 is a cross-sectional view in which a female screw is screwed and tightened with a cross driver.

FIG. 5 (a) is an enlarged cross-sectional view of a screw engagement portion of the second embodiment of the present invention. (B) is an enlarged sectional view of a screwed portion of the second embodiment. (C) is an enlarged sectional view of a screw engagement portion of the second embodiment. (D) is an enlarged sectional view of a screw engagement portion of the second embodiment. (E) It is a side view of the bolt, the washer, and the nut of Embodiment 2 of the present invention.

FIG. 6 is a side view of the tap having a thread on the male thread side of FIG. (B) FIG. 6 is a front view of a tap having a thread on the external thread side of FIG. 5C.

7 (a) is a sectional view of a die having the female thread side of FIG. (B) FIG. 6 is a perspective view of a die having a female screw side blade of FIG.

FIG. 8 (a) is a perspective view of the method of attaching the cross screw described in [0008] and [0008] FIG. (B) Mounting of the cross screw described in (0008) above (the washer 4a is fitted to the cross screw, the cross screw M is passed through the strip K 'having a hole slightly thicker than the cross screw, and the cross screw M
Into the female screw of the belt plate with a cross screwdriver and tighten)
It is sectional drawing of completion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fastener 2 Bolt 2a Head 2b Main body 3 Male screw 3a Valley 3b Roundness 3c Crest 3d Roundness 4 Nut 4a Washer 5 Female thread 5a Valley 5b Roundness 5c Peak 5d Roundness 6 Fastener 7 Bolt 7a Head 7b 8 Male thread 8a Valley 8b Peak 8c Round 8d Round 9 Nut 10 Female thread 10a Valley 10b Peak 10c Round 10d Round A Tap body A 'Groove section B Thread section C Tap body C' Groove section D Thread section E Dice Body F Screw part G Dice body H Screw part j Cross screw K Band plate L Band plate M Cross screw N Band plate P Band plate

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[Procedure amendment]

[Submission date] April 28, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Name of device] Fastener

[Utility model registration claims]

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a screw engagement portion described in (A ) 0004 (1) . (B) It is an enlarged sectional view of the screw engagement part of 0004 (1) . (C) It is an enlarged sectional view of the screw engagement part of 0004 (1) . (D) It is an enlarged sectional view of the screw engagement portion of the description of 0004 (1) . (E) It is a side view of the bolt, the washer and the nut of the first embodiment of the present invention.

FIG. 2A is a side view of a tap having a thread on the male thread side of FIG. (B) FIG. 2 is a front view of a tap having a thread on the male thread side of FIG.

3 (a) is a cross-sectional view of a die having a female thread side blade of FIG. 1 (c) according to the present invention. (B) also threads are oblique view of a die with blades of the female screw side of Figure 1 c.

FIG . 4A is a perspective view of a method of mounting a cross screw described in 0006A . FIG. 2B is a cross-sectional side view of FIG.

FIG. 5 is an enlarged cross-sectional view of a screwed portion described in (a) 0004 (2) . (B) It is an enlarged sectional view of the screw engagement part of the description of 0004 (2) . (C) It is an enlarged sectional view of the screw engagement part of 0004 (2) . (D) It is an enlarged sectional view of the screw engagement part of the description of 0004 (2) . (E) It is a side view of the bolt, the washer, and the nut of Embodiment 2 of the present invention.

FIG. 6 is a side view of the tap having a thread on the male thread side of FIG. (B) FIG. 6 is a front view of a tap having a thread on the external thread side of FIG. 5C.

7 (a) is a sectional view of a die having the female thread side of FIG. (B) FIG. 6 is a perspective view of a die having a female screw side blade of FIG.

FIG. 8 (a) is a perspective view of the method of attaching the cross screw described in [0008] and [0008] FIG. (B) Mounting of the cross screw described in (0008) above (the cross screw M 1 is passed through the band plate K ′ having a slightly thicker hole than the cross screw with the washer 4a fitted on the cross screw , and the cross screw M is banded. FIG. 4 is a cross-sectional side view showing completion of screwing and tightening of a female screw of a plate with a cross driver.

[Description of Signs] 1 Fastener 2 Bolt 2a Head 2b Body 3 Male Thread 3a Valley 3b Round 3c Crest 3d Round 4 Nut 4a Washer 5 Female Thread 5a Valley 5b Round 5c Peak 5d Round 6 Fastener 7 Bolt 7a Head 7b Body 8 Male thread 8a Valley 8b Crest 8c Round 8d Round 9 Nut 10 Female thread 10a Valley 10b Peak 10c Round 10d Round A Tap body A 'Groove section B Thread section C Tap body C' Groove section D Thread part E Dice body F Thread part G Dice body H Thread part j Cross screw K Band plate L Band plate M Cross screw N Band plate P Band plate

[Procedure amendment 2]

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FIG. 8 ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 23, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Name of device] Fastener

[Utility model registration claims]

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a screwed portion described in (a) 0004 (1). (B) It is an enlarged sectional view of the screw engagement part of 0004 (1). (C) It is an enlarged sectional view of the screw engagement part of 0004 (1). (D) It is an enlarged sectional view of the screw engagement portion of the description of 0004 (1). (E) It is a side view of the bolt, the washer and the nut of the first embodiment of the present invention.

[2] (b) The present invention of threads 1 is a side view of a tap having a male thread side of the blade of the wafer. (Ii) likewise threaded 1 is a front view of a tap having a male thread side of the blade of the wafer.

[3] (a) The present invention of threads 1 is a cross-sectional view of a die with blades of the female screw side Ha. (Ii) likewise threaded 1 is a perspective view of a die with blades of the female screw side Ha.

[4] (a) 0006, it is a perspective view of a mounting method of the cross threads of the described Lee. FIG. 2B is a cross-sectional side view of FIG.

FIG. 5 (a) is an enlarged sectional view of a screw engagement portion described in 0004 (2). (B) It is an enlarged sectional view of the screw engagement part of the description of 0004 (2). (C) It is an enlarged sectional view of the screw engagement part of 0004 (2). (D) It is an enlarged sectional view of the screw engagement part of the description of 0004 (2). (E) It is a side view of the bolt, the washer, and the nut of Embodiment 2 of the present invention.

FIG. 6 is a side view of the tap having a thread on the male thread side of FIG. (Ii) likewise threaded 5 is a front view of a tap having a male thread side of the blade of the wafer.

7 (a) is a sectional view of a die having the female thread side of FIG. (Ii) likewise threaded 5 is a perspective view of a die with blades of the female screw side Ha.

8 (a) 0008, it is a perspective view of a mounting method of the cross threads of the described Lee. (B) 0008, a and cross screws M, through cross screws M, a little, strip N which are perforated thick hole than the cross screw fit the washer 4a the cross screw mounting (cross screws described Lee FIG. 9 is a cross-sectional side view showing completion of screwing and tightening of the female screw of the band plate P with a cross driver.

FIG. 9 is an enlarged cross-sectional view of a screwed portion described in 0004 and (2).

FIG. 10 is an enlarged cross-sectional view of a screwed portion described in 0004 and (2).

FIG. 11 is an enlarged cross-sectional view of a screwed portion described in 0004 and (2).

FIG. 12 is an enlarged cross-sectional view of a screwed portion described in 0004 and (2).

FIG. 13 is an enlarged cross-sectional view of a screwed portion described in 0004 and (2).

FIG. 14 is an enlarged cross-sectional view of a screwed portion described in 0004 and (2).

FIG. 15 is an enlarged cross-sectional view of a screw engagement portion in the description of 0004 and (2).

FIG. 16 is an enlarged cross-sectional view of a screwed portion described in 0004 and (2).

FIG. 17 is a side view of a semi-finished product of the tap 11 before thread cutting.

FIG. 18 is a cross-sectional side view of the faucet 11, which is subjected to thread cutting to finish a male screw Q.

FIG. 19 is a view of the faucet 11, viewed from the back side of the front view.

FIG. 20 is a side view of a semi-finished product of the water tap 11 before thread cutting.

FIG. 21 is a diagram showing a tapping process performed on the faucet 11 to obtain a male screw R,
It is sectional side view which finished.

FIG. 22 is a view of the faucet 11, viewed from the back side of the front view.

[Description of Signs] 1 Fastener 2 Bolt 2a Head 2b Body 3 Male Thread 3a Valley 3b Round 3c Crest 3d Round 4 Nut 4a Washer 5 Female Thread 5a Valley 5b Round 5c Peak 5d Round 6 Fastener 7 Bolt 7a Head 7b Body 8 Male thread 8a Valley 8b Crest 8c Round 8d Round 9 Nut 10 Female thread 10a Valley 10b Peak 10c Round 10d Round 11 Faucet (semi-finished product) A Tap body A 'Groove section B Thread section C Tap body C 'Groove part D Thread part E Dice body F Thread part G Dice body H Thread part j Cross screw K Strip plate L Strip plate M Cross screw N Strip plate P Strip plate Q Male thread R Male thread

[Procedure amendment 2]

[Document name to be amended] Drawing

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FIG. 9

FIG.

FIG.

FIG. 5

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FIG. 11

FIG.

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FIG.

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FIG.

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[Procedure amendment]

[Submission date] August 31, 1995

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a screw engagement portion described in (A ) 0004 (1) . (B) It is an enlarged sectional view of the screw engagement part of 0004 (1) . (C) It is an enlarged sectional view of the screw engagement part of 0004 (1) . (D) It is an enlarged sectional view of the screw engagement portion of the description of 0004 (1) . (E) It is a side view of a bolt, a washer, and a nut of explanation of 0005 .

FIG. 2 (a) The thread of the present invention has the shape of the external thread shown in FIG.
It is a side view of the tap of FIG. FIG. 1B is a front view of a tap having a male screw shape in FIG. 1C.

FIG. 3 (a) The thread of the present invention is the shape of the female thread of FIG.
It is sectional drawing of the dice of FIG. (B) also threads are <br/> oblique view of a die in the shape of the internal thread of Figure 1 C.

FIG. 4 is a perspective view of a method of attaching a cross screw described in (a) 0006. (B) A cross-sectional side view in which a washer 4a is fitted to the cruciform screw described in 0006, the cruciform screw is passed through the band plate K, and the band plate L is screwed into the female screw with a cross driver.

FIG. 5 is an enlarged cross-sectional view of a screwed portion described in (a) 0004 (2) . (B) It is an enlarged sectional view of the screw engagement part of the description of 0004 (2) . (C) It is an enlarged sectional view of the screw engagement part of 0004 (2) . (D) It is an enlarged sectional view of the screw engagement part of the description of 0004 (2) . (E) A side view of the bolt, washer and nut described in 0007 .

[6] (a) the present invention of the thread in FIG. 5, the shape of the teeth of the male thread
It is a side view of a tap of a shape . (B) Similarly, the thread is shown in Fig.5. It is a front view of the tap of a male screw shape .

FIG. 7 shows the shape of the female thread of FIG.
It is a cross-sectional view shaped for dice. (Ii) likewise threaded 5 is a perspective view of a die in the shape of the internal thread of the wafer.

FIG. 8 is a perspective view of a method of mounting a cross screw described in (A) 0008; (B) It is a sectional side view of the completion of attachment of the cross screw described in 0008.

[Procedure amendment 3]

[Document name to be amended] Drawing

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FIG. 2

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Claims (8)

[Utility model registration claims] 1. Description of Embodiment 1 [0005] In the description of Embodiment 1 of the present invention, an iron bolt which is a combination of a bolt having both a valley, a trapezoidal ridge and a triangular thread as shown in FIGS. (Head has a square or hexagon), nut or male screw (head has a cross or one or hexagonal depression) and female screw, length and thickness, and pitch of screw thread vary in size. I do. Request for mass production of trapezoidal screws by thread rolling machine or forging method of trapezoidal screw of the present invention (as standard product). 2. A bolt having the same trapezoidal thread in the valley and the crest as shown in FIGS. 5 and 2 in the description of the second embodiment of the invention, and the same trapezoidal thread in the crest and the valley receiving the same. Iron bolts (having a square or hexagonal head) combined with a certain nut, nuts or male screws (having a cross or one or a hexagonal recess in the head) and female screws with length and thickness dimensions The dimensions of the pitch of the thread may also vary. Request for mass production of trapezoidal screws by thread rolling machine or forging method of trapezoidal screw of the present invention (as standard product). 3. A resin bolt and nut or a male screw and a female screw having a trapezoidal thread shape as described in claim 1 and having different lengths and thicknesses. The pitch of the thread is also large and small accordingly. Request a mass production system with resin molding machine for above trapezoidal screw (as standard product). 4. A resin bolt and nut or a male screw and a female screw in the form of a trapezoidal screw thread as described in claim 2 and having a length and a size similar to each other. The pitch of the thread is also large and small. Request a mass production system with resin molding machine for above trapezoidal screw (as standard product). 5. In the description of 0006, set the drill on the drilling machine, turn on the power supply, and turn the drill by tapping the iron plate or various alloys with a tap having a trapezoidal shape of FIG. Drill a hole, set a tool (Fig. 2, b, tap of type B) to cut the female screw with a part of the male screw on the tapping machine, turn on the power and turn the tap. Cut. Fig. 4 (a)
As shown in (b), screw in a steel plate or various alloys so that a cross screw is screwed in. Therefore, the trapezoidal tap of the present invention, which has a trapezoid in the valley and a triangular thread in the ridge as shown in FIGS. The dimensions of the main body tap and the pitch of the screw thread are also large and small. In addition, taps shown in Fig.2, b and b have four straight grooves A ', which are not shown but three A tap having a spiral groove and a thread having a tapered groove, or a straight tap may also be used as a tap having a trapezoid and a triangle according to the present invention. 6. In the description of 0007, the thread and the thread root shown in FIGS.
(Set the drill on the drilling machine, turn on the power switch, rotate the drill, make a hole, and use a part of the male screw as a blade to cut the female screw. Turn on the power switch and turn the tap) and turn off the female screw. As shown in Fig. 8, (a) and (b), the cross screw is screwed into the iron plate or various alloys as shown in Figs. 8, (a) and (b). Request a trapezoidal tap of the present invention with a thread. The dimensions of the main body tap body and the pitch of the screw thread also vary in size. And tap figure 6, a,
(B) shows a tap having four straight grooves C ', which is not shown in the drawing, but a tap having a spiral groove having three grooves and a tapered thread or a straight tap according to the present invention. The crests and thread roots are used as taps for trapezoidal threads. 7. A screw (F) in which the thread portion of the die body E having the shape shown in FIG.
Set the tool (trapezoidal die) that cuts the male screw with a part of the blade on a lathe, etc. and cut the screw. (Turn on the power of the lathe and turn on the iron semi-finished product or semi-finished product of various alloys. ) Is used for rough cutting with a cutting tool set on a lathe and then turning the dies to cut the external threads of the semi-finished product. The dimensions of the die body of the straight thread or the tapered thread and the dimension of the thread pitch are also varied in size. 8. A tool (trapezoidal die) for cutting a male screw using a part of the screw H as a blade in order to make a thread part and a valley part of a die body G having a shape shown in FIG. Set the machine on a lathe and turn off the screws (turn on the power of the lathe and rough cut the semi-finished product of iron or various alloys (the semi-finished product set on the lathe) with the cutting tool set on the lathe. And then rotate the die (used to turn the lathe rotation axis) to cut the external thread. The dimensions of the die body of the straight thread or the tapered thread and the dimension of the thread pitch are also varied in size.