JP2520396Y2 - Washers, packing-mounted bolts and nuts, and fastening devices composed of them - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a washer in which a washer and a rubber packing are attached to a bolt and a nut, a packing-attached bolt and a nut, and a fastening device including them.

In particular, the present invention relates to a washer used for fastening a segment in tunnel construction such as subways and sewers, a packing mounting type bolt and nut, and a fastening device including these.

(Prior Art) Conventionally, a bolt and a nut were screwed into a set, and a washer and a packing were separately delivered. Therefore, every time the work is fastened at the construction site, a washer and packing are manually inserted into the bolt base end, the bolt is inserted into the fastening location, and the packing and washer are inserted into the bolt tip and tightened with a nut. Have concluded.

In addition, an automatic segment assembly device has recently been developed in tunnel construction for subways, sewers, etc., and in order to fasten segments with this device, it is necessary to supply bolts and nuts by mounting bolts and nuts with washers and packing. Is occurring.

Therefore, it is partially adopted that the bolts and nuts and the washers are welded or fixed with an adhesive, and the washers and the packing are fixed with an adhesive.

Furthermore, Japanese Patent Publication No. 45-24734 is also disclosed, but in the washer of this publication, when a hole is formed in the back metal, the tubular portion is projected from the back metal by a certain length. When this washer is used together with a bolt to tighten the fastening member, the tip of the tubular portion penetrates the rubber ring and contacts the fastening member. Therefore, a fastener receiving member is required in addition to the washer to which a rubber ring is adhered or fixed because it scratches the fastening member that abuts the tip of the tubular portion or damages the rustproof coating applied to the surface of the fastening member. I am trying.

(Problems to be solved by the invention) For bolts and nuts that have been delivered in a conventional screwed state, washers and packing separately packed are manually inserted when fastening segments at the construction site. There was a problem that it took time to store and manage the washers and packing. In addition, there is a drawback that a lot of labor is required for the fastening work.

If the washer and packing are fixed to the bolt and nut with welding or adhesive, the washer and packing rotate together with the nut when the nut is rotated and tightened to the bolt. There was a problem that I could not do it.

Further, when using bolts, nuts, and washers whose surface is plated or resin-coated for rust prevention and corrosion, if welding is applied, the rust prevention and corrosion prevention performance is deteriorated.

Further, JP-B-45-24734 requires a fixture receiving member in addition to a washer to which a rubber ring is adhered or fixed when used for tightening a fastening member together with a bolt. Therefore, there has been a drawback that the fastening work with this type of bolt is complicated and the cost is increased by the amount of the fixture receiving member required.

An object of the present invention is to provide a washer, a packing mounting type bolt and nut, and a fastening device including them, in which a washer and a rubber packing are incorporated and attached to each of the bolt and the nut, and the problems and drawbacks are eliminated.

(Means for Solving the Problem) In order to achieve this object, in the present invention, a chamfered portion is provided on one surface of the inner diameter of a flat washer that is larger than the shaft portion of the bolt.

A base end that is a tapered base that fits into this chamfer,
It consists of a middle part that is a circular middle part that fits into the inner diameter of a flat washer, and a tip that has a taper tip part that has a base end part that is larger in diameter than this circular middle part and that is a tapered tip part. Provide a rubber packing with a bolt hole slightly smaller than the shaft.

The taper tip of this rubber packing is inserted into the inner diameter of the flat washer from the chamfer, and the circular center of the rubber packing is inserted into the inner diameter of the flat washer. Then, the taper base portion is inserted into the chamfered portion of the flat washer to insert the rubber packing into the washer, and the shaft portion of the bolt is inserted into the bolt hole of the rubber packing so as to be locked.

In addition, a chamfer is provided on one surface of the inner diameter of a flat washer that is larger than the shaft of the bolt, and the seat surface of the nut that is screwed into this bolt has a base end that is larger than the screw hole of the nut. Provide a tapered hole with a larger diameter than the base end.

A base end that is a taper base that fits into this taper hole,
The washer has a circular middle portion that fits into the inner diameter of the washer, and a base end portion that fits into the chamfered portion of the washer having a larger diameter than the circular middle portion, and has a tapered tip end portion. Provide rubber packing.

Then, a bolt hole having a diameter slightly smaller than the shaft portion of the bolt was bored in the central portion of the tapered base portion, the circular intermediate portion and the tapered tip portion.

Using the elasticity of this rubber packing, insert the taper base into the taper hole of the nut, project the tip of the rubber packing further from the seat surface of the nut, and insert the taper tip of the rubber packing into the inner diameter of the side opposite to the chamfered part of the washer. The structure is such that it is fitted and locked.

Further, the washer and packing mounting type bolt and the washer and packing mounting type nut described above are screwed together.

(Operation) The chamfered portion 5 is provided on the inner diameter 3 larger than the bolt shaft portion 1a of the bolt 1 formed in the two flat washers 2, and the bearing surface 6 of the nut 4 is provided.
The base end 8a is larger than the screw hole 7 of the nut 4, and the inside of the seat surface 6 is formed with a taper hole 8 larger than the base end 8a.

Then, the taper base portion 9 fitted into the chamfered portion 5 of the washer 2
A rubber packing 15 composed of a circular intermediate portion 11 to be inserted into the inner diameter 3 of the flat washer 2 and a tapered tip portion 12 having a tapered end portion 12a having a base end portion 12a having a diameter larger than that of the circular intermediate portion 11. To provide.

Further, a bolt hole 14 having an inner diameter slightly smaller than that of the bolt shaft portion 1a is bored in the central portion through the respective taper base portion 9, circular intermediate portion 11 and taper tip portion 12.

In addition, the taper base 10 that is fitted into the taper hole 8 of the nut 4
And a circular intermediate portion 11 to be fitted into the inner diameter 3 of the flat washer 2 and a base end portion 13a to be fitted into the chamfered portion 5 of the washer 2 having a diameter larger than the circular intermediate portion 11, and the tapered tip is tapered. A rubber packing (16) including a tip portion (13) is provided.

Further, a bolt hole 14 having an inner diameter slightly smaller than that of the bolt shaft portion 1a is bored in the central portion through the respective tapered base portion 10, circular intermediate portion 11 and tapered tip portion 13.

Using the elasticity of rubber, the taper tip portion 12 of one rubber packing 15 is applied to the chamfered portion 5 of one washer 2, and the inner diameter 3 of this washer 2 is inserted into the circular intermediate portion 11. Then
The taper base portion 9 of the rubber packing 15 is inserted into the chamfered portion 5 of the washer 2. Further, the taper tip portion 12 is projected from the surface opposite to the chamfered portion 5 of the washer 2 and locked to the outer circumference of the inner diameter 3 on the surface opposite to the chamfered portion 5 of the washer 2, and the rubber packing 15 is stabilized as shown in FIG. Then, the washer 2 is fitted and fixed. Chamfer 5 of washer 2 with rubber packing 15 inserted
Bolt 1 in the bolt hole 14 of the rubber packing 15 on the side where the
The washer 2 is mounted on the bolt 1 together with the rubber packing 15 as shown in FIG.

Similarly, the elasticity of rubber is used to apply the taper base 10 of the other rubber packing 16 to the washer 6 of the nut 4,
The washer 6 is fitted into the tapered hole 8 from the base end 8a. Then, as shown in FIG. 7, the rubber packing 16 is stably inserted and fixed to the nut 4. If the taper tip portion 13 of the rubber packing 16 protruding from the seat surface 6 of the nut 4 is inserted from the surface opposite to the surface of the other washer 2 on which the chamfered portion 5 is provided, and is inserted into the circular intermediate portion 11, it is shown in FIG. The washer 2 is inserted into the nut 4 together with the rubber packing 16 as shown by the chain double-dashed line.

(Example) Below, it demonstrates in detail based on the accompanying drawing which showed an example of implementation of the washer concerning this invention, a packing apparatus type | mold bolt and nut, and the fastening device which consists of them.

FIG. 1 is a side view showing a state in which a bolt and a nut of the present invention are set, FIG. 2 is a plan view seen from a surface provided with a chamfered portion of a washer, and FIG. 3 is a washer showing a state in which a rubber packing is fitted. The plan view and FIG. 4 are sectional views taken along the line AA in FIG.
FIG. 5 is a plan view of the nut as seen from the seat surface direction, FIG. 6 is a plan view of the nut with the rubber packing inserted as seen from the seat surface direction, and FIG. 7 is a cross section taken along the line BB of FIG. It shows a figure.

Reference numeral 1 shown in FIG. 1 is a hexagonal headed bolt, and 1a is a shaft portion of the hexagonal headed bolt 1.

Reference numeral 2 is a plain washer, and an inner diameter 3 is bored which is considerably larger than the shaft portion 1a of the hexagon head bolt 1, and reference numeral 4 is a hexagon nut screwed to the hexagon head bolt 1.

Reference numeral 5 denotes a chamfered portion provided on one surface of the inner diameter 3 of the plain washer 2 for inserting a taper base portion 9 of a rubber packing 15 described later or inserting and locking a taper tip end portion 13 of a rubber packing 16. belongs to.

Reference numeral 8 is a taper hole bored inside the nut 4 from the seat surface 6 of the nut 4, and the base end portion 8a of the nut seat surface 6 is made larger than the screw hole 7 of the nut 4 so that the inner diameter 3 of the flat washer 2 is 3 And the diameter inside the seat surface 6 is larger than that of the base end portion 8a.

Reference numerals 15 and 16 are rubber packings made of water-expandable rubber or the like, the volume of which becomes 1.5 times when water is contained. One rubber packing 15 is a taper base portion 9 which is fitted into the chamfered portion 5 of the flat washer 2, a circular intermediate portion 11 which is fitted into the inner diameter 3 of the plain washer 2 and a circular intermediate portion 11 as shown in FIG. The flat washer 2 is composed of a base end portion 12a having a diameter larger than the inner diameter 3 and a taper tip end portion 12 having a tapered tip. Other rubber packing
Reference numeral 16 denotes a taper base 10 which is fitted into the tapered hole 8 of the bearing surface 6 of the nut 4, a circular intermediate portion 11 which is fitted into the inner diameter 3 of the flat washer 2 and the circular intermediate portion 11, that is, a chamfered portion from the inner diameter 3 of the flat washer 2. The base end portion 13a is enlarged in a tapered shape along the line 5. And
A taper tip portion 13 that is tapered from the tip of the base end portion 13a is provided.

Reference numerals 14 and 14 are taper bases of the rubber packings 15 and 16, respectively.
These bolt holes are bored through the central parts of the circular intermediate parts 9, 10 and the circular intermediate parts 11, 11 and the tapered tip parts 12, 13 to have an inner diameter slightly smaller than that of the bolt shaft part 1a.

To use this, use one rubber packing 15
The taper tip portion 12 is inserted into the inner diameter 3 from the chamfered portion 5 side of the one flat washer 2, and the taper base portion 9 is attached to the chamfered portion 5.
The circular intermediate portions 11 are fitted into the inner diameters 3, respectively. Then, the plain washer 2 is sandwiched between the taper base portion 9 and the taper tip portion 12 of the rubber packing 15 as shown in FIG.

Then, by inserting the tip of the bolt 1 into the bolt hole 14 slightly smaller than the bolt shaft portion 1a of the rubber packing 15 from the direction of the taper base portion 9 of the rubber packing 15, the washer 2 and the rubber 2 are attached to the bolt 1 as shown in FIG. The packing 15 is stably inserted.

Further, the taper base portion 10 of the other rubber packing 16 is inserted into the taper hole 8 of the seat surface 6 of the nut 4 from the base end portion 8a, and the circular intermediate portion 11 and the taper tip portion 13 protruding from the seat surface 6 of the nut 4 are inserted.
Then, another plain washer 2 is inserted from the opposite surface on which the chamfered portion 5 is provided.

By doing so, as shown in FIG. 7, the nut 4
The rubber packing 16 and the flat washer 2 are stably inserted in the.

(Effect of the Invention) As described above, since the washer 2 and the rubber packings 15 and 16 are stably inserted into the bolt 1 and the nut 4 and delivered in the state shown in FIG. 1, the bolt / nut, the washer and the rubber are provided. The packing can be stored and managed easily.

In addition, it is not necessary to insert washers and rubber packings into the bolts at the construction site each time a segment is connected for tunnel construction such as subways and sewers, and washers 2 and rubber packings 15 and 16 are attached to bolts 1 and nuts 4 respectively. Since it is inserted, the efficiency of fastening work can be improved.

Further, the washer 2 and the rubber packings 15 and 16 are bolts 1.
Since it is attached to the nut 4, it is optimal as a bolt and nut to be supplied to the recently developed automatic segment assembly device.

Further, since the welding process is not involved, the anticorrosion and anticorrosion performance of the bolts, nuts and washers whose surfaces are plated or resin coated is not deteriorated.

[Brief description of drawings]

The attached drawings show an example of the implementation of the present invention, FIG. 1 is a side view showing a state where bolts and nuts are set, and FIG. 2 is a plan view seen from a surface provided with a chamfer only for a washer, FIG. 3 is a plan view showing a state where the rubber packing is fitted in the washer. 4 is an enlarged sectional view taken along the line AA of FIG. 3, FIG. 5 is a plan view of the nut as seen from the seat surface direction, and FIG. 6 is a seat surface direction showing a state in which a rubber packing is fitted into the nut. FIG. 7 is a plan view seen from above, and FIG. 7 is an enlarged cross-sectional view taken along the line BB of FIG. 1 ... Bolt, 1a ... Shaft part, 2 ... Plain washer, 3 ... Inner diameter, 4 ... Nut, 5 ... Chamfer part, 6 ... Nut seat surface, 7 ... Screw hole, 8 ... Taper Hole, 8a ... Base end, 9,
10 …… Tapered base, 11 …… Circular intermediate part, 12,13 …… Tapered tip, 12a, 13a …… Base end, 14 …… Bolt hole, 15,16
…… Rubber packing.

Claims (3)

(57) [Scope of utility model registration request] 1. A chamfered portion 5 is provided on one surface of an inner diameter 3 of a flat washer 2 larger than a shaft portion 1a of a bolt 1, and the chamfered portion 5 is provided.
Has a base end which is a tapered base portion 9 which is fitted to the inner surface, a middle portion which is a circular middle portion 11 which is fitted into the inner diameter 3 of the flat washer 2, and a base end portion 12a which is larger in diameter than the circular middle portion 11. Is provided with a tapered tapered tip portion 12 and a rubber packing 15 in which a bolt hole 14 having a diameter slightly smaller than the shaft portion 1a of the bolt 1 is bored is provided at the center thereof, and the taper tip of the rubber packing 15 is provided. Insert the portion 12 into the inner diameter 3 of the flat washer 2 from the chamfered portion 5, and insert the circular intermediate portion 11 of the rubber packing 15 into the inner diameter 3 of the flat washer 2.
Insert the taper base portion 9 into the chamfered portion 5 of the flat washer 2 to fit the rubber packing 15 into the washer 2, and insert the shaft portion 1a of the bolt 1 into the bolt hole 14 of the rubber packing 15 A washer and packing mounting type bolt with a structure to stop it. 2. A chamfered portion 5 is provided on one surface of an inner diameter 3 of a flat washer 2 which is larger than a shaft portion 1a of a bolt 1, and a bearing surface 6 of a nut 4 screwed to the bolt 1 is larger than a screw hole 7 of the nut 4. A base end having a diameter of a base end portion 8a, and a taper hole 8 having a larger diameter inside the seat surface 6 than the base end portion 8a is provided, and a base end which forms a taper base portion 10 to be fitted into the taper hole 8; 2 has an intermediate portion which is a circular intermediate portion 11 which is fitted in the inner diameter 3 and a base end portion 13a which is fitted in the chamfered portion 5 of the washer 2 having a diameter larger than that of the circular intermediate portion 11 and which has a tapered tip end. A rubber packing 16 which is composed of a distal end formed as a portion 13 and has a bolt hole 14 having a diameter slightly smaller than the shaft portion 1a of the bolt 1 is provided in the center thereof, and the taper base portion 10 of the rubber packing 16 is attached to the nut 4 of the nut 4. The rubber packing 16 is inserted into the tapered hole 8 and the tip of the rubber packing 16 is projected from the seat surface 6 of the nut 4, and the chamfered portion 5 of the washer 2 is inserted. The opposite inner diameter 3 brought fitted to the tapered distal portion 13 of the rubber packing 16, a washer made of locked to the structure, the packing-mounted nut. 3. A fastening device formed by screwing the bolt according to claim 1 and the nut according to claim 2 together.