JP2003269423A - Fastener for connecting plates - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To connect plates, release the connection as needed and remove a fastener from the plates. <P>SOLUTION: This fastener includes male/female connectors 1 and 2, the female connector having a fit-recess 16 with a female screw 17 formed on its inner circumference, the male connector having a male screw 7 formed on its outer circumference, a fit-in portion 5 allowing the diameter reduction, and a lock shaft 6 with an elastic locking claw 11 on its outer circumference. The male/female connectors joins two plates by attaching the female connector to one of the plates and screwing in the fit-in portion 5 to the fit-recess 16 to join the female and male connectors, while by inserting the lock shaft 6 to a locking opening 23 of the other plate to fix the claw 11. Upon release of the joint, the plates are separated by removing the claw 11 from the opening and the male and female screws 7 and 17 are removed by turning the male connector 1. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate connecting fastener for connecting and connecting plates so that the plates are in contact with each other.

[0002]

2. Description of the Related Art Many fasteners for connecting plates to each other in a contact surface form have been proposed and put into practical use. In particular, fasteners made of plastic have excellent formability, and since rigidity and elasticity can be freely selected, many types of implements have been provided centering on structures that utilize elastic restoring force. The connecting fastener of the plate proposed by the present invention is to connect and connect the plate and the plate in a state of being in contact with each other, and one of the most suitable objects thereof is a top plate of furniture or the like, and the other plate is The fastener is a connecting fastener that is advantageously used when it is the top plate of the furniture main body to which the top plate is fixed, that is, when the top plate is fixedly assembled on the upper surface of a library or the like.

Conventionally, when the top plate is placed and fixed on the upper surface of a metal library, it is usually fixed with bolts and nuts.
For fixing with this bolt, a metal nut is embedded in the lower surface of the top plate, a through hole is opened in the upper plate of a library or the like which is aligned with the position of the nut, and the bolt is inserted through the through hole from below the upper plate. A method of fixing the top plate by inserting it and screwing it into the nut and tightening it is adopted.

Since most of the top plates used in recent archives and the like are made of plastic, the nuts can be embedded during the manufacture thereof, so that the nuts can be attached without any special effort. Tightening the bolts is always a work in a narrow space under the top plate, which is troublesome and there is a problem of lacking work efficiency.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of inefficiency in work and the difficulty of separating materials when they are discarded after use. It was developed in. That is, as described above, when fixing the top plate with bolts and nuts, in addition to the work of aligning the nuts and the through holes, the work of inserting the bolts into the through holes in the narrow space below the top plate of the library etc. Since the subsequent tightening work for the nut is required, it takes time for each work, resulting in poor efficiency.

In addition, in the case of a plastic top plate which has been frequently used recently, it is advantageous in terms of cost because insert molding of nuts is possible in addition to moldability, but it is discarded after use. At times, it is difficult to separate the nuts embedded in the top plate, which makes disposal work difficult.

The present invention has been developed in view of the above problems, and its purpose is to fix it to one of the top plate and the top plate of the library in a temporarily fixed state in advance. It can be placed and can be connected by pressing the plates in contact with each other when they are fixed.Furthermore, the plates can be firmly connected by twisting them slightly with a hand or a tool. Is to provide a fastener for.

Further, according to the present invention, when the top plate is to be removed after use, the plates can be uncoupled and removed by a simple operation including the reverse operation of the twisting operation using the above-mentioned tool, and the top plate can be removed. Another object of the present invention is to provide a fastener for connecting plates, which does not require separation due to homogenization with a plastic material and can eliminate the sorting work at the time of disposal.

[0009]

DISCLOSURE OF THE INVENTION The present invention provides a fastener for connecting plates formed of plastic to achieve the above-mentioned object, and includes a female connector and the female connector plate. It is an object of the present invention to provide a fastener for connecting plates, which is composed of a male-type connecting body that connects and connects two plates.

More specifically, the present invention will be described in more detail. A female connector provided on one of the plates to be connected, and the one plate and the other plate connected thereto are joined to each other via the female connector. A male connecting body, wherein the female connecting body is provided with a fitting recess for forming an internal thread on an inner peripheral surface thereof, while the male connecting body is capable of reducing a diameter for forming an external thread on an outer peripheral surface at one end thereof. A cylindrical fitting part and a locking shaft part that forms an elastic locking claw on the outer peripheral surface at the other end are integrally formed, and the fitting part of the male coupling body is fitted to the female coupling body. While being inserted into the recess and coupled by screwing the male and female screws and locked to the one plate,
The locking shaft portion of the male coupling body is inserted into a locking through hole formed in the other plate in a freely rotatable state, and the elastic locking claw is hooked on the edge of the through hole to thereby hold the two plates. An object of the present invention is to provide a fastener for connecting plates, which can connect the plates to each other in a state of being in contact with each other.

One of the uses of the above fastener is that the female connector is preliminarily provided on one plate such as a top plate, and the locking shaft portion of the male connector is the other plate. An elastic locking claw provided on the outer peripheral surface of the locking through hole formed in the upper plate is locked and locked in a freely rotatable state, and in this state, the female connector is fitted. Insert the male fitting into the recess and screw the female and male screws provided on both sides to join the two into a temporarily fixed state, and then connect the other plate, that is, the opposite of the top plate. The tip of the locking shaft portion that comes out to the side is twisted with a tool or the like, and the male and female screws are tightened to join and join the two plates in a state in which they closely contact each other.

As another usage of this fastener, one female plate, that is, the joining surface (lower surface) of the top plate is provided with a female connector, and the male connector is fitted to the fitting recess. Insert the insertion part of and tighten both female and male screws, and assemble both connectors into one to make the male connector stand upright from the bottom surface of the top plate. Through the overlapping work, the locking shaft portion of the male connecting body is inserted into the locking through hole of the upper plate, and the elastic locking claw is hooked on the edge of the through hole to connect the plates together.

The fastener of the present invention can be used by changing the procedure as described above, and other procedures will be described in detail in the description of the embodiments below. By the way, the fastener of the present invention, which connects and joins the plates so as to connect the top plate and the upper plate of the library in this manner, is provided with a tool or the like for the locking shaft portion of the male connecting body that penetrates the plate and projects to the opposite side. When it is twisted by using it, the tightening of the male screw that is screwed into the female screw of the female connector is released, so that both connector can be separated. Therefore, this releases the binding of the board members,
The top plate can be removed from the library.

On the other hand, if the elastic locking claw is retracted by inserting a hand into the locking shaft portion of the male connecting body in the locked state through the locking through hole of the plate, this locked state can be easily released. As a result, the male connector can be easily removed from the plate, which also allows the top plate to be removed from the top of the library.

Further, according to the present invention, in the fastener described above, a plate is characterized in that a fitting portion of the male connecting body is formed with a slit from a tip end to a base end, and a diameter can be reduced through the slit. To provide a connecting fastener.

The formation of the slit in the fitting portion helps the diameter reduction of the cylindrical fitting portion. When the slit is formed in the fitting portion of the female connector, the diameter is reduced in accordance with the press fitting. The male and female screws can be crossed over without damaging them and brought into the temporary connection state. And a firm bond can be achieved by a subsequent twisting operation of the male connector as described above.

Further, according to the present invention, in the above fastener, a protrusion is inserted into the bottom of the fitting concave portion of the female connecting body into the hollow portion at the distal end of the fitting portion of the male connecting body to prevent the shrinkage of the fitting portion. Another object of the present invention is to provide a fastener for connecting plates, which is characterized in that

When the male screw is tightened to the female screw by the twisting operation and the cylindrical fitting portion of the male coupling body is connected to the fitting recess, the projection provided on the bottom of the fitting recess is compressed. The diameter prevents the male and female screws from being tightened, so that the connection cannot be easily released unless the screw is twisted in the opposite direction, that is, untwisted.

The present invention also provides the above fastener,
To provide a fastener for connecting plates characterized in that a locking portion of a tool for rotating the male connecting body is formed at a tip end portion of a locking shaft portion of the male connecting body. is there.

Further, in the above fastener according to the present invention, the female connector is formed in a cap shape so that the hollow interior serves as a fitting recess, and the connecting surface (joint surface) of one plate to be connected.
The present invention provides a fastener for connecting plates, characterized in that a fixing portion for fitting and fixing the female connector is integrally formed on the plate, and one plate for connecting the female connector is further provided. It is an object of the present invention to provide a fastener for connecting plates, which is characterized in that it is integrally formed in advance on the connecting surface.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a fastener for connecting plates according to the present invention will be described in detail based on an embodiment shown in the drawings. Note that the example shown in the drawings is an example of the present invention, and changes or modifications of each part will be described together with other embodiments in the description of each part.

FIG. 1 is an exploded perspective view of a connecting fastener according to the present invention, FIG. 2 is an enlarged front view in a disassembled state, and FIG. 3 is a central longitudinal side view in the disassembled state. In the drawings, reference numeral 1 is a male connector that constitutes the connecting fastener of the present invention, 2 is a female connector that is connected to this male connector 1, and 3 is a top plate that is one plate to be connected. Yes, 4 indicates the top plate of the library which is the other plate.

Here, the male connecting body 1 and the female connecting body 2 are individually molded by using a plastic material having a required rigidity and elastic restoring force, and the top plate 3 as one plate is made of a plastic material. The upper plate 4 of the library which is the other plate of the above-mentioned molded product is a metal plate.

The male connector 1 comprises a fitting portion 5 at one end and a locking shaft portion 6 at the other end. The fitting portion 5 is formed in a cylindrical shape and a male screw 7 is formed on the outer peripheral surface thereof. The fitting portion 5 has four slits 8 at equal intervals along the axial direction from the tip end direction.
Is provided up to the vicinity of the base end portion, and the fitting portion 5 is substantially composed of four pieces 9, and each piece can be bent inward by utilizing the hollow portion 10 of the fitting portion 5. The outer diameter can be reduced.

The locking shaft portion 6 is formed as a cylindrical shaft body from the base end portion of the fitting portion 5 in the rear direction along a common axis. Then, two tongue-shaped elastic locking claws 1 which are cut in a U shape on the outer peripheral surface thereof and have a connection point on the tip side of the shaft portion.
1 and 11 are provided. The elastic locking claw 11 has a thickened claw tip 11a facing the base end side so as to be constantly raised from the outer peripheral surface of the shaft part. Further, when the claw tip is pressed inward, the connection point serves as a base point. Then, the hollow portion 12 is set back. Incidentally, the claw tip 11a of the elastic locking claw 11
A space 14 is provided between the fitting portion 5 having a brim shape and the lower surface 13 of the base end portion for receiving the thickness of the upper surface plate 4 described later.

On the other hand, a cross-shaped cut is made at the tip of the locking shaft portion 6 to form four recesses, and a locking portion 15 for a tool such as a driver is provided. It is designed to be hung and rotated.

On the other hand, the female connecting body 2 is formed in a cap shape, and the hollow fitting recess 16 has the inner diameter aligned with the outer diameter of the fitting portion 5 of the male connecting body 1, and the inner peripheral surface thereof. A female screw 17 that is screwed into the male screw 7 is formed on the. Furthermore,
A protrusion 18 is provided at the center of the bottom of the fitting recess 16 in the direction of the opening 16a, and when the fitting portion 5 is inserted into the fitting recess 16, the projection 18 is fitted to the tip of the hollow portion 10. I can put it in.

On the other hand, on the outer peripheral surface of the female coupling body 2, there are provided two kinds of large and small lips 19 and 20 for surely fixing to the fixing portion of the top plate 3 described later in the axial direction and preventing rotation. .

The top plate 3 formed of plastic material has a plate portion 3a on the surface, an edge portion 3b hanging along the periphery of the plate portion 3a, and a reinforcement appropriately disposed on the lower surface of the plate portion 3a. Rib 3c is integrally formed with the rib 3c.
A cylindrical fixing portion 21 is provided at a portion where c intersects.

On the other hand, the top plate 3 of the library is attached to the top plate 4.
A locking through hole 23 is opened in correspondence with the fixed portion 21 of FIG. The locking through hole 23 is the locking shaft portion 6 of the male connector 1.
It is formed to have a diameter slightly larger than the shaft diameter so that the intrusion of the shaft can be received without difficulty, and the locking shaft portion 6 can freely rotate inside the through hole in the received state. is there.

The fastener of the present invention is constructed as described above, and the actual use of this fastener will be described below. Since there are a plurality of methods of use and each produces different effects, a typical procedure will be described, and other procedures will be described. The fastener of the present invention is provided for connecting plates by a method in which the male and female connecting bodies 1 and 2 are separated and the two bodies are joined together during use, or the two bodies are integrally combined and joined together during use. It has become good. Therefore, here, the former method will be described first.

First, the individual female connector 2 is attached to the top plate 3.
The rib 19 and the groove 22 are aligned with each other so as to face the fixing portion 21 formed on the lower surface (joint surface) of the above, and press fit into the fixing portion 21. At this time, in order to obtain a strong fixed state, it is preferable to apply an adhesive agent inside the fixed portion. The female connector 2 press-fitted is securely fixed by adhering with the above adhesive and pressing the small rib 20 against the inner peripheral surface, and rotation of the rib 19 in the circumferential direction by engaging with the groove 22. Will be blocked.

On the other hand, the locking shaft portion 6 of the male connector 1 is pushed from above the upper surface plate 4 toward the locking through hole 23, and when the elastic locking claw 11 passes, the claw tip 11a of the upper plate is moved. It is attached to the lower surface and attached to the upper surface plate 4. In this locked state, since the space 14 for receiving the plate thickness of the upper surface plate 4 is formed between the claw tip 11a and the lower surface 13 of the base end portion of the fitting portion 5, the locking shaft portion 6 is held in the locking through hole 23. It can rotate freely in the presence.

In this way, the female connector 2 is fixed to the top plate 3, and the male connector 1 is locked to the other plate, that is, the upper plate 4, and then both connectors are vertically aligned. When the fitting portions 5 of the male connecting body 1 are aligned with the fitting concave portions 16 of the female connecting body and the connecting bodies 1 and 2 are pressed against each other, the fitting portion 5 is formed so that its diameter can be reduced as described above. Therefore, the two bodies are joined by fitting while receiving the resistance of the male and female screws 7 and 17.

Although the connection of the two bodies due to this pressing is incomplete, the male and female screws 7 and 17 are engaged with each other, so that they are temporarily engaged with each other, and the top plate 3 temporarily becomes the top plate. It will be fixed on top of 4. The pressing of the two connecting bodies 1 and 2 can be performed by pressing the top surface of the top plate 3 together. Further, when a plurality of fasteners are arranged on the lower surface and the upper surface of the top plate and they are joined together, the entire surface of the top plate 3 can be pressed uniformly so that all the fasteners can be simultaneously joined in the temporarily joined state.

After the temporary binding state is obtained in this way,
Next, the locking portion 1 of the locking shaft portion 6 protruding to the lower surface side of the upper surface plate 4
When a tool such as a screwdriver is applied to 5 to twist the male connector 1 so as to rotate, the male screw 7 engaged with the female screw 17 is tightened and the fitting portion 5 is fixed to the fitting recess 16. The connection of the two connecting bodies 1 and 2 is achieved, and the top plate 3 is firmly fixed on the top plate 4.

When the male screw 7 is tightened, the fitting portion 5 enters and the hollow portion 10 has a distal end portion with a projection 1 of a fitting recess.
Since the fitting portion 5 that has been capable of being reduced in diameter since 8 has entered and blocked it, the reduction in diameter is prevented, the screwed state of the male screw 7 and the female screw 17 is secured, and a strong connected state is guaranteed. become.

As is apparent from the above description, in the fastener of the present invention, the work of fitting the female type connecting body 2 into the fixing portion 21 of the top plate and fixing it and the locking shaft portion 6 of the male type connecting body 1 to the top plate. The work of attaching to the locking through hole 23 of No. 4 and the pressing of the two can achieve the connection between the two, and if the male connecting body 1 is then twisted, a reliable and strong connection can be obtained. become. Therefore, as compared with the above-described conventional fastening method using the metal nut and bolt, the fastening can be efficiently performed by a much easier work.

By the way, in the above description, the case where the male and female connecting bodies 1 and 2 are used as separate bodies has been described. However, in the fastener of the present invention, the two bodies are pre-joined and the plate is directly joined. Can be used for. In this combined use, the female connector 2 is attached to the fixing portion 21 of the top plate 3, the entire fastener is previously attached to the lower surface of the top plate 3, and then the top plate 4 is attached to the top plate 3. The upper surface plate 4 and the top plate 3 can be joined and fixed immediately by projecting the locking shaft portion 6 of the male connector 1 into the locking through hole 23 by covering the upper plate 4 and the top plate 3.

In this case, the male and female connectors 1, 2 are
If the female screws 7 and 17 are tightly tightened, the tightening work on the lower surface of the upper plate 4 can be omitted, and the plate connecting and connecting work can be performed more efficiently.

In this way, the fastener of the present invention, which has achieved the plate-to-plate connection, pushes inward the elastic locking claws 11 of the locking shaft portion 6 protruding from the lower surface of the upper surface plate 4 to connect with the edges of the locking through holes 23. The male connector 1 can be easily removed by removing the top plate 3 from the top plate 4. The pushing operation of the elastic locking claw 11 can be easily performed by picking with a finger, but may be appropriately performed using a tool.

After pulling out from the locking through hole 23, if the male connecting body 1 is twisted and separated from the female connecting body 2, only the female connecting body 2 remains on the top plate and is discarded. If it becomes advantageous. As is apparent from the above description, in the fastener of the present invention, the male connector 1 can be easily removed from the upper plate 4, so that the top plate can be easily removed and at the same time, the upper plate is made of a metal plate. Even if there is no fastener made of plastic is left on it, the sorting work at the time of disposal becomes extremely easy.

The fastener of the present invention has been described above according to the embodiment shown in the drawings, but the top plate which is one of the plates as described above without the female connector 2 forming a part of the fastener being an independent body. When 3 is formed of a plastic material, a cylindrical body is provided in a portion corresponding to the fixed portion 21 to integrally form the fitting recessed portion 16, and the female screw 17 is directly formed on the inner peripheral surface by tapping. Good. In this case, it is possible to omit the molding as a separate body.

The formation of the female connector 2 by this method is integrated with the top plate 3 and is made of the same material, so that not only the assembling work can be omitted, but also the sorting work at the time of disposal is completely unnecessary. is there.

In forming the female connector 2, it is troublesome to form the female screw 17 formed on the inner peripheral surface of the fitting recess 16, but the connector 2 is divided into two parts at the center. Molding in this state, and when attaching to the fixing portion 21, both of them are tying together to form a cap shape so as to be fixed, whereby the difficulty in molding can be easily eliminated.

Further, four slits 8 are provided to help reduce the diameter of the fitting portion 5, and the slit is divided into four. However, the number of slits may be two, three, or more. May be. In short, the slits only need to assist the bending of the fitting portion 5 and maintain a predetermined outer diameter in the normal state, so that it is not necessary to specify the number, width and depth of cut.

The number of the elastic locking claws 11 provided on the locking shaft portion 6 is two in the embodiment, but one or three elastic locking claws 11 are not excluded from the fastener of the present invention. It goes without saying that the work is complicated when a large number of elastic locking claws are provided at the time of releasing the locked state, and thus it is necessary to select an appropriate one.

In addition, the same applies to the locking portion 15 for twisting the male connecting body 1, and in addition to forming a cross shape assuming the use of a driver. Forming a minus shape does not hinder the implementation. Of course, a concavo-convex portion may be formed on the outer peripheral surface of the tip portion outside these to serve as a frictional resistance portion during a twisting operation.

[0049]

The fastener of the present invention constructed and used as described above can be used for connecting one plate to another so that the top plate is fixed to a top plate of a library or the like, and the plates are connected so as to be in contact with each other. A female connector is provided in advance on the plate, both bodies are assembled to the female connector through the fitting portion of the male connector, and then the locking shaft portion of the male connector is attached to the other plate. It is possible to immediately connect and connect the plates together by pushing it into the locking through hole that is drilled in, or the above-mentioned female connecting member is provided on one plate and the locking shaft portion of the male connecting member is attached to the above-mentioned engaging member. After engaging with the through hole and attaching it to the other plate, the both parts are butted to fit the fitting part into the fitting recess, and the male and female screws are tightened to connect the plates together easily. The advantage is that they can be easily connected.

The fastener is released from the locked state by pressing and retracting the elastic locking claw on the peripheral surface of the locking shaft portion projecting through the locking through hole on the back side of the other plate like the upper plate. Since it is possible, one of the top plates can be easily removed, and after pulling out from the locking through hole, twisting the male connector can also be easily removed from the female connector, so it is discarded. There is an advantage that time post-processing can be easily performed.

On the other hand, since the fastener of the present invention is molded from a plastic material, when one plate is made of the same quality plastic as the top plate, the female connector which is left on this plate at the time of disposal is disposed. It can be disposed of without separating it. Therefore, the work is much easier and advantageous as compared with the case of using the conventional metal nut.

Further, in the fastener of the present invention, when the plates are joined together by insufficient connection of the plates, the male and female screws intervene in the connection between the male and female connectors, and the male connector is twisted. Since both screws can be tightened by this, there is an advantage that a firm connection between the plates can be obtained beyond mere pressing. Further, from this, when the plates are joined by a plurality of fasteners, if distortion occurs, there is an advantage that the distortion can be easily eliminated by individually adjusting the tightening of the fasteners of the respective parts. .

[Brief description of drawings]

FIG. 1 is an exploded perspective view illustrating a relationship in which a fastener of the present invention intervenes between a top plate that is two plates and a top plate of a library.

FIG. 2 is an enlarged front view in which the fastener of the present invention is disassembled.

FIG. 3 is an enlarged central vertical sectional side view of the fastener of the present invention, which is disassembled.

FIG. 4 is an enlarged plan view of a female connector that constitutes the fastener of the present invention.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a front view showing a partial cross section of a use state in which a top plate which is two plates and a top plate of a library are connected and coupled.

FIG. 7 is an enlarged central vertical cross-sectional view of a fixed portion formed on the joining surface of the top plate.

FIG. 8 is a bottom view of the fixing portion shown in FIG.

[Explanation of symbols]

1 Male connection 2 Female connection 3 Top plate as one plate 4 The top plate of the library as the other plate 5 Fitting part 6 Locking shaft 7 Male screw 8 slits 10 Hollow part of fitting part 11 Elastic locking claw 11a Tip of elastic locking claw 12 Hollow part of locking shaft 13 Lower surface of the base of the fitting part 14 Distance between the tip of the claw and the base end of the fitting part 15 Locking part 16 Fitting recess 17 female screw 18 protrusions 19 Positioning rib 20 Press-fitting rib 21 Fixed part 22 groove 23 Locking hole

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16B 35/04 F16B 35/04 L 35/06 35/06 G 37/04 37/04 C D F term ( Reference) 3J001 FA03 GA01 GA06 GB01 HA02 HA07 JA04 JD02 KA19 KB03 3J024 AA50 CA17 3J036 AA03 BA01 BB06 CA03 DA04 DB08 EA05

Claims (6)

[Claims] 1. A male-type connecting body that joins a female-type connecting body provided on one plate to be connected and another plate connected to the one plate via the female-type connecting body, The female coupling body is provided with a fitting recess for forming a female screw on the inner peripheral surface,
On the other hand, the male coupling body has a cylindrical fitting portion capable of reducing a diameter and having a male screw formed on the outer peripheral surface at one end, and a locking shaft portion having an elastic locking claw that is freely retractable on the outer peripheral surface at the other end. By integrally mounting the male connector, the fitting portion of the male connector is inserted into the fitting recess of the female connector, and the male and female screws are screwed together to assemble both connectors. While being locked to the one plate, the locking shaft portion of the male connector is inserted into a locking through hole formed in the other plate in a freely rotatable state, and the elastic locking claw is engaged. A fastener for connecting plates, characterized in that the two plates are connected and connected to each other in a state where they are in contact with each other by being hung on the edge of the through hole. 2. The insertion part of the male connector according to claim 1, wherein a slit is formed from the distal end portion toward the proximal end portion,
A fastener for connecting plates, characterized in that the diameter can be reduced through the slit. 3. The projection according to claim 1 or 2, which is inserted into a hollow portion at a distal end of a fitting portion of the male connecting body at a bottom portion of the fitting concave portion of the female connecting body to prevent a diameter reduction of the fitting portion. A fastener for connecting and connecting plates, which is characterized by being raised. 4. The method according to claim 1, 2 or 3,
A fastener for connecting plates, characterized in that an engaging portion of a tool for rotating the male connecting body is formed at a tip end portion of an engaging shaft portion of the male connecting body. 5. The female connector according to any one of claims 1 to 4, wherein the female connector is formed in a cap shape and has a hollow interior as a fitting recess, and the female connector is provided on a joint surface of one plate to be joined. A fastener for connecting plates, characterized in that a fixing portion for fitting and fixing is integrally formed. 6. The fastener for connecting plates according to any one of claims 1 to 4, wherein the female connector is integrally formed on a connecting surface of one plate to be connected.