JP2004330208A - Female screw member, method for manufacturing female screw member, and device for manufacturing female screw member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a female screw member, and a method and a device for manufacturing the female screw member which have a simple structure and by which the efficiency of mass production is improved. <P>SOLUTION: The female screw member 30 is formed protrusively on a plate-liked member 20 and it is integrally formed to the plate-liked member 20. A prepared hole 40 is formed to the plate-liked member 20 by a hole punching process. Then, the surrounding part of the prepared hole 40 is subjected to a burring process to form protruding edge parts 51, 52 which are protruded from the plate-liked member 20. Female screws 57, 58 are formed on the inner face side of the protruding edge parts 51, 52 by the screw transfer forming. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a female screw member protruding from a plate member and integrally formed with the plate member, a method of manufacturing the female screw member, and a manufacturing apparatus of the female screw member.
[0002]
[Prior art]
This type of female screw member is provided in various devices. An example of the device is a printer. The printer has, for example, a printer main body and a frame arranged inside the printer main body. The frame is made by molding a metal plate. The frame is fixed to the inside of the printer main body, for example, to hold various mechanical parts inside the printer.
This frame uses the above-described female screw member to fix various mechanism parts to the frame. For example, when the male screw member is screwed into the female screw member of the frame, the frame can fix various mechanical parts.
When a female screw member is formed on a sheet metal such as a frame, a power-driven tapping unit is used (for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-7-60545 (page 1, FIG. 1)
[0004]
[Problems to be solved by the invention]
When the female screw is formed using this conventional power-driven tapping unit, there are the following problems.
When a tapping unit is used, a lower block and an upper block are used. In the mold consisting of the lower block and the upper block, the tapping unit's tap rotates at high speed, and the female screw is processed on the sheet metal.Therefore, a motor for rotating the tap at high speed is required. Yes, the power consumption of the motor is large. Moreover, the structure of such a lower die block, a conventional die for sheet metal tracing provided with an upper die block and a power-driven tapping unit is very complicated.
[0005]
In addition, since the tap is rotated at a high speed, the tap is easily broken and not only hinders the formation of the female screw, but also has a limitation in the high-speed rotation of the tap. For this reason, when a female screw is machined in a metal mold for a sheet metal, there is a problem that mass production efficiency is not improved.
Accordingly, an object of the present invention is to provide a female screw member having a simple structure and a high mass production efficiency, a method of manufacturing the female screw member, and a manufacturing apparatus, which solve the above problems.
[0006]
[Means for Solving the Problems]
According to the first invention, a female screw member protruding from the plate-shaped member and integrally formed with the plate-shaped member is provided. A protruding edge portion is formed so as to protrude from the plate-shaped member by burring a peripheral portion, and a female screw is formed on an inner surface side of the protruding edge portion by screw transfer. It is a female screw member.
[0007]
According to the above configuration, a pilot hole is formed in the plate-like member by punching, and a protruding edge portion is formed around the pilot hole by burring. A female screw is formed on the protruding edge on the inner surface side by screw transfer.
As a result, the protruding edge formed by burring around the prepared hole has a female screw formed by screw transfer on the inner surface side, eliminating the need for a conventionally used tap and a motor for rotating the tap. It is. Therefore, it is not necessary to rotate the tap at a high speed, and the female screw member is easily formed on the plate-like member.
Since a female screw can be formed on the inner surface side of the protruding edge portion by screw transfer, it is not necessary to use a tap, and threading with a conventional tap is unnecessary. For this reason, the mass production efficiency of the female screw member can be improved.
[0008]
A second invention is characterized in that, in the configuration of the first invention, a plurality of the projecting edges face each other, and the female screw is formed on an inner surface side of each of the projecting edges.
In the above configuration, the plurality of protruding edges face each other, and a female screw is formed on the inner surface side of each protruding edge.
Thereby, a female screw member can be easily obtained only by forming a female screw on the inner surface side of each protruding edge portion by screw transfer.
[0009]
A third invention is a method for manufacturing a female screw member that is formed integrally with the plate-shaped member by projecting from the plate-shaped member. A drilling process for forming a pilot hole, and a burring process for forming a protruding edge portion so as to protrude from the plate-like member by burring a peripheral portion of the pilot hole; And a screw transfer process for forming a female screw on the inner surface side of the protruding edge portion by screw transfer.
[0010]
According to the above configuration, the prepared hole forming step forms a prepared hole by performing prepared hole preparation on the plate-shaped member. In the burring step, a protruding edge portion is formed so as to protrude from the plate-shaped member by performing burring on a peripheral portion of the prepared hole.
In the screw transfer processing step, a female screw is formed on the inner surface side of the protruding edge portion by screw transfer.
As a result, the female screw can be processed on the inner surface side of the protruding edge portion by the screw transfer, so that the screw processing step by the high-speed rotation of the tap, which is conventionally required, becomes unnecessary. As a result, the processing of the female screw member can be performed at a higher speed than the screw processing using a tap, and the pre-drilling and burring processing can be performed in a short time, so that mass production efficiency can be improved in the production of a plate-shaped member having the female screw member. improves.
Compared to using a conventional tapping unit, it can be manufactured with a simple structure and the mass production efficiency is improved, so that the cost can be reduced.
[0011]
In a fourth aspect based on the configuration of the third aspect, in the screw transfer processing step, a plurality of the projecting edges face each other, and the female screw is formed on an inner surface side of each of the projecting edges. It is characterized by.
In the above configuration, in the screw transfer processing step, a plurality of projecting edges face each other, and a female screw is formed on the inner surface side of each projecting edge.
Thereby, a female screw member can be easily obtained only by forming a female screw on the inner surface side of each protruding edge portion by screw transfer.
[0012]
The fifth invention is an apparatus for manufacturing a female screw member which is formed integrally with the plate-shaped member by projecting from the plate-shaped member. A pilot hole processing section for forming a pilot hole, and a burring processing section for forming a protruding edge portion so as to protrude from the plate-like member by burring a peripheral portion of the pilot hole, A thread transfer processing unit for forming a thread on the inner surface side of the protruding edge portion by thread transfer.
[0013]
According to the above configuration, the prepared hole processing section forms a prepared hole by performing a prepared hole on the plate-shaped member. The burring processing section forms a protruding edge portion so as to protrude from the plate-shaped member by performing burring on a peripheral portion of the prepared hole.
The screw transfer processing section forms a female screw on the inner surface side of the protruding edge portion by screw transfer.
As a result, the female screw can be processed on the inner surface side of the protruding edge portion by the screw transfer, so that the screw processing step by the high-speed rotation of the tap, which is conventionally required, becomes unnecessary. As a result, the processing of the female screw member can be performed at a higher speed than the screw processing using a tap, and the pre-drilling and burring processing can be performed in a short time, so that mass production efficiency can be improved in the production of a plate-shaped member having the female screw member. improves.
Compared to using a conventional tapping unit, it can be manufactured with a simple structure and the mass production efficiency is improved, so that the cost can be reduced.
Since a complicated structure such as a conventionally used tapping machine is not required, the structure of the apparatus for manufacturing a female screw member of the present invention can be simplified and the size can be reduced.
[0014]
In a sixth aspect based on the configuration of the fifth aspect, the screw transfer processing section includes a die on which the plate-shaped member is placed and an inner surface of the protruding edge of the plate-shaped member placed on the die. A screw groove transfer punch for forming a female screw by pressing the screw groove transfer punch, and a pressing operation unit for pressing the screw groove transfer punch against the inner surface of the protruding edge portion.
[0015]
According to the above configuration, the die of the screw transfer processing section is for mounting a plate-shaped member. The thread groove transfer punch is for forming a female screw by pressing against an inner surface of a protruding edge of a plate-shaped member placed on a die. The pressing operation unit presses the thread groove transfer punch against the inner surface of the protruding edge.
By adopting such a structure, the female thread can be reliably formed on the inner surface side of the protruding edge portion by the screw transfer while the screw transfer processing portion has a simple structure.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a printer 1 as an example to which a plate-shaped member having a female screw member of the present invention is applied. The printer 1 is an example of a device. The printer 1 includes a printer main body 10 and a plate-shaped member 20. Other components of the printer 1 are not shown for simplification of the drawing.
[0017]
The printer 1 is, for example, an ink jet recording apparatus, and is a printer that can perform color printing or black and white printing by ejecting various types of black, yellow, magenta, and cyan inks.
The printer body 10 is made of, for example, plastic or metal. Inside the printer main body 10, a plate-shaped member 20 is housed and held. The plate-shaped member 20 is a member for holding various internal components. The plate-shaped member 20 is also called an internal frame plate.
[0018]
In the example of FIG. 1, the plurality of female screw members 30 are formed on the side surfaces 20 </ b> A of the plate-shaped member 20. Each female screw member 30 is formed to protrude inward at the side surface portion 20A.
[0019]
FIG. 2 is an enlarged view of the female screw member 30 shown in FIG. 1 and its peripheral portion. Since the plurality of female screw members 30 shown in FIG. 1 have the same structure, one female screw member 30 is representatively shown in FIG.
The female screw member 30 is formed to protrude toward the inner surface 20B of the side surface portion 20A of the plate-shaped member 20. The female screw member 30 is formed around the central axis CL of the side surface portion 20A. The center axis CL is an axis perpendicular to the side surface 20A.
FIG. 3 is a side view of the side surface portion 20A and the female screw member 30 of the plate-shaped member 20 of FIG. FIG. 4 is a sectional view taken along line AA of FIG. FIG. 5 is a plan view of the female screw member 30 and the side surface portion 20A viewed from the direction F in FIG. FIG. 6 is a side view as viewed from the direction G in FIG.
[0020]
The female screw member 30 and the plate-shaped member 20 will be described with reference to FIGS.
The plate-shaped member 20 is a flat plate-shaped metal plate that can be plastically deformed, for example, and the plate-shaped member 20 can be a metal plate such as iron, stainless steel, aluminum, magnesium alloy, or brass. . This plate-shaped member 20 is, for example, a rolled steel plate.
The female screw member 30 protrudes with respect to the side surface portion 20A of the plate-shaped member 20, and is formed integrally with the side surface portion 20A of the plate-shaped member 20.
[0021]
As shown in FIGS. 2 and 5, the side surface portion 20 </ b> A has a prepared hole 40. The pilot hole 40 has a central circular portion 41, one rectangular portion 42 and the other rectangular portion 43, as shown in FIG. The circular part 41 is located at the center of the rectangular part 42 and the rectangular part 43, and the circular part 41 and the rectangular parts 42 and 43 are continuous.
[0022]
Around the circular portion 41, a first protruding edge portion 51 and a second protruding edge portion 52 are formed to protrude from the inner surface 20B of the side surface portion 20A along the X direction in FIG.
As shown in FIG. 5, the first protruding edge portion 51 and the second protruding edge portion 52 are symmetrical with respect to the center axis L, and each have an arc shape. The central axis L is a straight line passing through the centers of the circular portion 41, the rectangular portion 42, and the rectangular portion 43 of the pilot hole 40. The central axis L is a line parallel to the inner surface 20B of the side surface portion 20A and perpendicular to the central axis CL.
[0023]
As shown in FIGS. 2 and 4, a female screw 57 is formed on the inner surface 54 of the first protruding edge 51. Similarly, a female screw 58 is formed on the inner surface 55 of the second protruding edge 52.
As shown in FIG. 4, the male screw 170 of the male screw member 13 is detachably screwed into the female screws 57 and 58.
[0024]
FIG. 7 shows a manufacturing apparatus 100 of the female screw member 30 and a manufacturing method 60 of the female screw member shown in FIGS.
As shown in FIG. 7A, the female screw member manufacturing apparatus 100 includes a pilot hole processing unit 101, a burring processing unit 102, and a screw transfer processing unit 103.
[0025]
As shown in FIG. 7B, the method 60 for manufacturing a female screw member includes a pilot hole punching step ST1, a burring step ST2, and a screw transfer processing step ST3.
The prepared hole processing section 101 of the female screw member manufacturing apparatus 100 includes a punch 110 and a die 111. The prepared hole processing section 101 is a die for processing a prepared hole 40 as a through hole in the side surface portion 20A of the plate-shaped member 20.
[0026]
The burring processing unit 102 illustrated in FIG. 7A includes a stripper 120, a die 121, and a burring punch 122. The burring processing unit 102 performs a flanging process on the side surface 20A of the plate-shaped member 20 using a burring punch 122, so that the first protruding edge portion 51 and the 2 is a mold for forming the protruding edge 52.
The screw transfer processing unit 103 illustrated in FIG. 7A is a mold including a die 130, a pressing operation unit 131, and a screw groove transfer punch 132.
The pressing operation unit 131 includes a punch plate 135, a spring 136, a stripper 137, and a slide cam 138.
[0027]
When the punch plate 135 is pressed by an external actuator (not shown) in the P direction, the slide cam 138 is pressed obliquely in the R direction by the pressing force of the punch plate 135.
When the slide cam 138 is pushed in the R direction, the thread groove transfer punch 132 is pushed in the T direction against the urging force of the spring 136, so that the transfer groove 139 of the thread groove transfer punch 132 becomes It is pressed against the inner surface 54 of the first protruding edge 51 or the inner surface 55 of the second protruding edge 52. In the transfer groove 139, a female screw 57 can be formed on the inner surface 54 of the first protruding edge 51, and a female screw 58 can be formed on the inner surface 55 of the second protruding edge 52 by screw groove transfer.
[0028]
The slide cam 138 is pushed obliquely downward along the inclined surface 140 of the stripper 137. The angle θ of the inclined surface 140 is, for example, 45 degrees. The T direction, which is the moving direction of the thread groove transfer punch 132, is a direction crossing the P direction by 90 degrees, and is a horizontal direction in FIG. The axial direction of the spring 136 is along this T direction.
[0029]
The outer surface 20C of the side portion 20A is in close contact with the lower surface of the stripper 137, and the inner surface 20B of the side portion 20A is in close contact with the upper surface of the die 130. As a result, the side surface portion 20A is held so as to be sandwiched between the stripper 137 and the die 130. The outer peripheral surface of the first protruding edge portion 51 and the outer peripheral surface of the second protruding edge portion 52 are held in close contact with the inner peripheral surface of the hole 145 of the die 130.
[0030]
Next, a method 60 for manufacturing a female screw member will be sequentially described with reference to FIGS. 7A and 7B.
Pre-hole punching process ST1
FIGS. 8 to 10 show that the pilot hole 40 is formed in the side surface portion 20A of the plate-like member by the preliminary hole punching process performed in the preliminary hole punching step ST1 shown in FIGS. 7A and 7B. It shows a state formed through.
The pilot hole 40 has a circular portion 41, a rectangular portion 42, and a rectangular portion 43.
[0031]
When forming the pilot hole 40 shown in FIGS. 8 to 10, the pilot hole processing unit 101 shown in FIG. 7A is used. The side surface portion 20A of the plate-shaped member 20 is mounted on the mounting surface 111A of the die 111 of the prepared hole processing section 101. At this time, the area where the prepared hole 40 is formed is positioned at a position corresponding to the hole 111B of the die 111.
[0032]
By moving the punch 110 along the J direction by an actuator (not shown), the punch 110 can instantaneously form the prepared hole 40 in the side surface 20 </ b> A on the die 111. The shape of the punch 110 in this case has a shape corresponding to the shape of the pilot hole 40 as shown in FIG.
In this way, the pilot hole 40 can be formed in the side surface portion 20A in a short time by the relative movement of the punch 110 and the die 111, and the pilot hole 40 as shown in FIGS. 8 to 10 is obtained. .
[0033]
Burring step ST2
When the prepared hole punching step ST1 is completed, the process proceeds to a burring step ST2 in FIG. 7B.
FIGS. 11 to 14 show an example in which the first protruding edge 51 and the second protruding edge 52 are formed by the burring step ST2 in FIG. 7B.
[0034]
FIG. 15 shows the burring processing unit 102 shown in FIG. 7A in an enlarged manner.
When the first protruding edge 51 and the second protruding edge 52 are burred on the side surface 20A of the plate-shaped member 20 by the burring processing unit 102, the following process is performed.
As shown in FIGS. 7A and 15, the outer surface 20 </ b> C of the side surface 20 </ b> A of the plate-shaped member 20 is in close contact with the lower surface 120 </ b> A of the stripper 120. The inner surface 20B of the side surface portion 20A is in close contact with the upper surface 121A of the die 121.
In this manner, the side surface portion 20A is held while being sandwiched between the stripper 120 and the die 121.
[0035]
The burring punch 122 is pressed by an actuator (not shown) along the K direction inside the stripper 120. The burring punch 122 is pushed in the K direction, and the burring punch 122 presses the peripheral portion of the circular portion 41 shown in FIGS. 11 and 12 to plastically deform, thereby forming the first projecting edge portion 51 and the second projecting edge. The part 52 is formed between the die 121 and the inner surface of the hole 121B by flanging. That is, as shown in FIGS. 11 to 13, the first protruding edge 51 and the second protruding edge 52 are symmetrical about the center axis CL in FIG. 15 as shown in FIGS. 11 to 13. In such a way as to protrude.
As described above, the burring processing unit 102 performs the burring process from the outer surface 20C side of the side surface portion 20A to the inner surface 20B side, so that the first projecting edge portion 51 and the second projecting edge after the burring process as shown in FIGS. An edge 52 can be obtained.
[0036]
Screw transfer processing step ST3
Next, when the burring step ST2 ends, the process proceeds to a screw transfer processing step ST3 shown in FIG. 7B.
16 to 19, the female thread 57 and the female thread 58 are respectively formed on the inner surfaces 54 and 55 of the first protruding edge 51 and the second protruding edge 52 after the screw transfer processing step ST3 is completed. The state is shown.
[0037]
FIG. 20 shows the screw transfer processing section 103 shown in FIG. 7A in an enlarged manner.
When the screw transfer processing section 103 shown in FIG. 20 forms the female screws 57 and 58 on the inner surfaces 54 and 55 of the first protruding edge 51 and the second protruding edge 52, the following is performed. .
The outer surface 20C of the side surface portion 20A is in close contact with the lower surface 137A of the stripper 137. The inner surface 20B of the side surface portion 20A is disposed in close contact with the upper surface 130A of the die 130.
In this way, the side portion 20A is held between the stripper 137 and the die 130.
[0038]
Next, when the punch plate 135 is pushed in the P direction by an actuator (not shown), the punch plate 135 slides the slide cam 138 in the R direction. When the slide cam 138 slides in the R direction, the thread groove transfer punch 132 slides in the T direction in the internal space 160 of the stripper 137. When the thread groove transfer punch 132 slides in the T direction, it slides against the urging force of the spring 136. However, the transfer groove 139 of the thread groove transfer punch 132 has, for example, a second projecting edge in the example of FIG. A female screw 58 can be formed on the inner surface 55 of the 52 by screw transfer.
[0039]
When the female screw 57 is formed on the inner surface 54 of the first protruding edge portion 51 using the screw groove transfer punch 132, for example, the die 130 shown in FIG. 20 is rotated 180 degrees along the central axis CL. As a result, the positions of the second protruding edge 52 and the first protruding edge 51 are changed by 180 degrees. Thereby, the screw groove transfer punch 132 can form the female screw 57 on the inner surface 54 of the first protruding edge 51 by screw transfer according to the above-described operation.
As shown in FIG. 17, the diameter of the transfer groove 139 of the thread groove transfer punch 132 is set to be larger than the diameters of the inner surfaces 54 and 55 of the first projecting edge 51 and the second projecting edge 52. Accordingly, at the time of screw transfer, the screw groove transfer punch 132 can reliably form female threads on the inner surfaces 54 and 55, respectively.
[0040]
The printer 1 as an example of the device shown in FIG. 1 is a relatively small printer.
However, FIG. 21 shows an example of a slightly larger printer. In the printer 510, a plate-shaped member 520 having the female screw member 30 of the present invention is also housed inside the printer main body 511. Each female screw member of the plate-shaped member 520 fixes a component (not shown) to the plate-shaped member 520 by using the male screw member 13.
[0041]
The use of the apparatus and method for manufacturing a female screw member according to the present invention has the following advantages.
By performing the method for manufacturing a female screw member using the manufacturing apparatus for a female screw member of the present invention, all of the pilot hole, burring, and screw transfer processing can be performed in a mold. Therefore, a thread forming step of forming a screw while rotating a tap at a high speed, which has been conventionally used, becomes unnecessary.
[0042]
There is no need to use a conventional tapping machine, and the female screw can be easily and reliably processed by internal thread transfer to the inner surface of the protruding edge. In the present invention, since all of the pilot hole processing, the burring processing and the screw transfer processing can be performed using the respective dies, the structure of the manufacturing apparatus is simple, hard to break, and at the time of manufacturing the female screw member. Speed is fast. That is, since the pilot hole processing, the burring processing, and the screw transfer processing can all be performed at a high speed using the mold, the mass production efficiency of the plate-shaped member including the female screw member can be increased.
[0043]
The pilot hole punching section, burring section and screw transfer processing section in the case of manufacturing the female screw member of the present invention are all dies, and do not require a complicated structure such as a conventionally used tapping machine. In addition, the manufacturing apparatus for the female screw member can be simplified and downsized.
In the illustrated example described above, an example of the device is a printer. However, the present invention is not limited to this, and it is possible to form a female screw member on a plate-shaped member used for various types of devices irrespective of area and field, such as other types of electronic devices and electric devices. .
[0044]
In the above-described embodiment, for example, as shown in FIG. 16, the two protruding edges 51 and 52 are formed so as to protrude by raising the periphery of the pilot hole. However, the present invention is not limited to this, and it is a matter of course that three or more protruding edges are raised and female screws are formed on the inner surfaces of the respective protruding edges by screw transfer.
The present invention is not limited to the above embodiment, and various changes can be made without departing from the scope of the claims.
Each configuration of the above embodiment can be partially omitted or arbitrarily combined so as to be different from the above.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a printer as an example of a device provided with a plate-shaped member having a female screw member according to the present invention.
FIG. 2 is a perspective view showing an example of the female screw member of FIG. 1;
FIG. 3 is a side view seen from a direction E in FIG. 2;
FIG. 4 is a sectional view taken along line AA in FIG. 2;
FIG. 5 is a plan view seen from a direction F in FIG. 2;
FIG. 6 is a side view as viewed from a direction G in FIG. 2;
FIG. 7 is a diagram showing an example of an apparatus for manufacturing a female screw member and a method for manufacturing a female screw member according to the present invention.
FIG. 8 is a perspective view showing an example of the shape of a pilot hole in a plate-like member after a pilot hole punching step is completed.
FIG. 9 is a plan view showing an example of the shape of a pilot hole in FIG. 8;
FIG. 10 is a side view showing an example of the shape of a pilot hole.
FIG. 11 is a perspective view showing an example of a first protruding edge and a second protruding edge after a burring step is completed.
FIG. 12 is a plan view of FIG. 11;
FIG. 13 is a side view of FIG. 11;
14 is a side view of FIG. 11 viewed from another direction.
FIG. 15 is an enlarged view showing a structural example of a burring processing unit.
FIG. 16 is a perspective view showing a female screw member having a female screw after a screw transfer processing step is completed.
FIG. 17 is a plan view of a female screw member.
FIG. 18 is a side view of the female screw member.
FIG. 19 is another side view of the female screw member.
FIG. 20 is an enlarged view showing the structure of a screw transfer processing unit.
FIG. 21 is a perspective view showing an example of another device to which a plate-shaped member having a female screw member of the present invention is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Printer (an example of apparatus), 13 ... Male screw, 20 ... Plate member, 20A ... Side surface part, 30 ... Female screw member, 40 ... Prepared hole, 51 ... 1st protruding edge portion, 52... 2nd protruding edge portion, 57, 58... Female screw, 101... Pilot hole punching processing portion, 102. Processing unit

Claims (6)

A female screw member protruding from the plate-shaped member and integrally formed with the plate-shaped member,
A protruding edge portion is formed so as to protrude from the plate-shaped member by performing burring on a peripheral portion of the prepared hole formed by the prepared hole in the plate-shaped member, and the protruding edge portion is formed by screw transfer. A female screw member, wherein a female screw is formed on the inner surface side of the female screw member. The female screw member according to claim 1, wherein a plurality of the protruding edges face each other, and the internal thread is formed on an inner surface side of each of the protruding edges. A method of manufacturing a female screw member that is formed integrally with the plate-shaped member by projecting from the plate-shaped member,
By performing a pilot hole on the plate-shaped member, a pilot hole forming step for forming a pilot hole,
A burring process for forming a protruding edge portion so as to protrude from the plate-shaped member by burring a peripheral portion of the pilot hole,
A screw transfer processing step for forming a female screw on the inner surface side of the protruding edge portion by screw transfer,
A method for manufacturing a female screw member, comprising: 4. The manufacturing of a female screw member according to claim 3, wherein, in the screw transfer processing step, the plurality of the protruding edges face each other, and the internal thread is formed on an inner surface side of each of the protruding edges. 5. Method. An apparatus for manufacturing a female screw member protruding from a plate-shaped member and integrally formed with the plate-shaped member,
A pilot hole processing unit for forming a pilot hole by applying a pilot hole to the plate-shaped member,
A burring processing section for forming a protruding edge portion so as to protrude from the plate-shaped member by burring a peripheral portion of the pilot hole,
A screw transfer processing unit for forming a female screw on the inner surface side of the protruding edge by screw transfer,
An apparatus for manufacturing a female screw member, comprising: The screw transfer processing section,
A die on which the plate-shaped member is placed;
A screw groove transfer punch for forming a female screw by pressing against the inner surface of the protruding edge of the plate-shaped member placed on the die,
A pressing operation unit for pressing the screw groove transfer punch against the inner surface of the protruding edge;
The manufacturing apparatus of the female screw member according to claim 5, comprising:

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