JPH0658217U - Fastening structure of synthetic resin plate - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is a composite that absorbs excessive tightening force of bolts and nuts, and imparts appropriate tightening force even if the tightening force is slightly weak, and enables damping of vibration. A fastening structure for a resin plate is provided. [Structure] A flange 6 abutting against the surface of the synthetic resin plate 1 at one end
And a metal sleeve 5 that penetrates through the bolt hole 3 of the synthetic resin plate 1. By pressing the tip of the metal sleeve 5, the synthetic resin plate is expanded and buckled in a petal shape in the radial direction. 1 is formed with a spring washer portion 7 that holds the flange 6 and the spring washer portion 7 is interposed between the synthetic resin plate 1 and the fixing member 2, and the metal sleeve 5 and the bolt hole 4 of the fixing member 2 are formed. Insert bolt 8 into nut 9
It is characterized by the structure tightened in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure in which a synthetic resin plate is fastened to a fixing member with bolts and nuts.

[0002]

[Prior art]

 Japanese Utility Model Publication No. 61-19118 provides a fastening structure in which a laminated steel plate is put together with other members with an eyelet washer, and a bolt is inserted into the eyelet washer and tightened with a nut.

[0003]

[Problems to be solved by the device]

 In the above-mentioned laminated steel plate fastening structure, the tightening force of the bolts and nuts acts on the member to be fastened through the eyelet washer, so that the members should be fastened in an appropriate state without applying excessive stress to the lamination. It means that you can

By the way, when a synthetic resin plate such as a fiber reinforced plastic (FRP) is fastened to a fixing member with bolts and nuts, the synthetic resin plate is damaged by excessive tightening force, and if the tightening force is weak, rattling occurs. Occurs.

Therefore, when the synthetic resin plate is fastened to the fixing member with the bolts and nuts according to the above-mentioned conventional technique, the tightening force of the bolts and nuts is applied to the synthetic resin plate through the eyelet washer. There is a problem that the synthetic resin plate is damaged by the tightening force, and although the above-mentioned conventional technique is effective for the laminated steel plate, it is not suitable for fastening the synthetic resin plate.

An object of the present invention is to absorb an excessive tightening force of bolts and nuts, and to give an appropriate tightening force even if the tightening force is slightly weak, thereby making it possible to dampen vibration. It is to provide a fastening structure for a plate.

[0007]

[Means for Solving the Problems]

 To achieve the above object, the present invention is characterized in that a synthetic resin plate is fastened to a fixed member with bolts and nuts, and a flange that abuts against the synthetic resin plate surface at one end and a synthetic resin plate. And a metal sleeve that penetrates through the bolt hole of the spring, and by pressing the tip of the metal sleeve, the spring washer part that expands and buckles in a petal shape in the radial direction to hold the synthetic resin plate with the flange. The spring washer portion is interposed between the synthetic resin plate and the fixing member, and the nut is tightened by inserting a bolt into the metal sleeve and the bolt hole of the fixing member. .

[0008]

[Action]

 With the above configuration, the spring action of the spring washer formed by expanding and buckling the tip of the metal sleeve in the radial direction in a petal shape absorbs the excessive tightening force of the bolt and nut against the synthetic resin plate. At the same time, even if the tightening force is slightly weak, an appropriate tightening force is applied and vibration damping action is possible.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a synthetic resin plate such as fiber reinforced plastic (FRP), and 2 is a fixing member for fastening the synthetic resin plate 1 with bolts and nuts. Therefore, the synthetic resin plate 1 and the fixing member 2 are provided with bolt holes 3 and 4, respectively.

Reference numeral 5 is a metal sleeve that penetrates the bolt hole 3 of the synthetic resin plate 1. A flange 6 that abuts against the surface of the synthetic resin plate 1 is provided at one end of the metal sleeve 5, and several slits are axially provided around the other end of the metal sleeve 5 as shown in FIG. 5a is provided.

By pressing the tip of the metal sleeve 5, a spring washer portion 7 is formed, which expands and buckles in the radial direction in a petal-like manner to hold the synthetic resin plate 1 with the flange 6. The spring washer portion 7 is interposed between the synthetic resin plate 1 and the fixing member 2, the bolt 8 is inserted through the metal sleeve 5, and the nut 9 is tightened.

To form the spring washer portion 7, as shown in FIG. 2, the metal sleeve 5 is passed through the bolt hole 3 of the synthetic resin plate 1 and the flange 6 is brought into contact with the surface of the synthetic resin plate 1, With the flange 6 in contact with a back member such as a backing plate, the pressing tool 10 is inserted from the tip of the metal sleeve 5 and pressed in the axial direction.

As a result, the tip end of the metal sleeve 5 is expanded and buckled in the radial direction in a petal shape by the slit 5a to form a spring washer portion 7 having a bullet function as shown in FIG. The synthetic resin plate 1 is held by the flange 6 and the spring washer portion 7.

The synthetic resin plate 1 in which the metal sleeve 5 is attached to the bolt hole 3 is assembled to the fixing member 2 with the spring washer portion 7 interposed, and the bolt 8 is attached to the metal sleeve 5 and the bolt hole 4 of the fixing member 2. The synthetic resin plate 1 is fastened to the fixing member 2 by inserting it and tightening it with the nut 9.

If the tightening force by the bolt 8 and the nut 9 is excessive, it is absorbed by the spring action of the spring washer portion 7 and does not reach the synthetic resin plate 1, so that the synthetic resin plate 1 is not damaged. To prevent.

Further, even if the tightening force is weak, the elastic force of the spring washer portion 7 acts to expand the space between the synthetic resin plate 1 and the fixing member 2 facing each other, thereby giving an appropriate tightening force. , Prevent the nut 9 from loosening.

Further, the elastic force of the spring washer portion 7 interposed between the synthetic resin plate 1 and the fixing member 2 also has the effect of damping the vibration, so that the vibration transmission to the synthetic resin plate 1 is achieved. To prevent.

[0018]

[Effect of device]

 As described above, according to the present invention, the tip of the metal sleeve that penetrates the bolt hole of the synthetic resin plate is pressed to radially expand the spring washer in a petal-like shape, and the spring washer is fixed to the synthetic resin plate. Since it is interposed between the member and the nut is tightened by inserting the bolt into the bolt hole of the metal sleeve and the fixing member, the spring washer absorbs the excessive tightening force of the bolt and nut. Moreover, even if the tightening force is a little weak, an appropriate tightening force is applied, vibration can be attenuated, and the tightened state is maintained without damaging the synthetic resin plate.

[Brief description of drawings]

FIG. 1 is a sectional view of the present invention.

FIG. 2 is an explanatory diagram for expanding and buckling the metal sleeve.

FIG. 3 is a cross-sectional view in which a spring washer portion is formed on a metal sleeve.

FIG. 4 is a perspective view of a metal sleeve.

[Explanation of symbols]

 1 Synthetic resin plate 2 Fixing member 3 Bolt hole 4 Bolt hole 5 Metal sleeve 6 Flange 7 Spring washer part 8 Bolt 9 Nut

Claims (1)

[Scope of utility model registration request] 1. A structure in which a synthetic resin plate is fastened to a fixing member with bolts and nuts, and has a flange that abuts the surface of the synthetic resin plate at one end, and a metal sleeve that penetrates a bolt hole of the synthetic resin plate. , A spring washer portion is formed by pressing the tip of the metal sleeve to expand and buckle in a radial direction in a petal shape to hold the synthetic resin plate with the flange, and the spring washer portion is formed into the synthetic resin plate. And a fixing member, and a fastening structure for a synthetic resin plate, characterized in that a bolt is inserted through the metal sleeve and the bolt hole of the fixing member to tighten the nut.