JPH094631A - Fixing tool - Google Patents

Abstract

PURPOSE: To provide a fixing tool formed by mutually tightly connecting together a metallic plate member and a synthetic resin plate member piled on each other so as to hold excellent air-tightness between two kinds of plate members. CONSTITUTION: A fixing tool is provided with a cylindrical sleeve 2, a little shorter than the thickness of a synthetic resin member with an inner hole 21 penetrating along its central shaft line and provided with a bolt 3 having its flange 32 of at least same diameter as the outer diameter of the sleeve 2 on the base end of a shaft part 33, and being screwed in a metallic plate member through the inner hole 21 and by penetrating the synthetic resin plate member. The synthetic resin plate member is compressed by the flange 32 by its length difference from that of the sleeve 2 so that a constant air-tightness can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for superposing a synthetic resin plate member on a metal plate member and closely bonding them to each other, and an airtightness is required between two kinds of plate members. It is used when

[0002]

2. Description of the Related Art Conventionally, when a metal plate member and a synthetic resin plate member are fixed to each other, a female screw hole is provided at a predetermined position of the metal plate member, and the synthetic resin plate member has the same position at a position slightly smaller than the bolt diameter. A large through hole was provided, a bolt through which a washer was inserted was inserted and tightened, and the washer was used to press the synthetic resin plate member. The tightening of the bolt is adjusted by controlling the torque with a torque wrench, etc.
Further, when airtightness is required between the metal plate member and the synthetic resin plate member, a gasket or the like is sandwiched to maintain the airtightness.

[0003]

However, it is very troublesome to perform torque control on site, and therefore, when tightening a large number of bolts, it is difficult to perform strict control. Therefore, there is a possibility that the tightening is weak and the two kinds of plate members do not come into close contact with each other so that the airtightness cannot be maintained, or that the synthetic resin plate member is damaged due to excessive tightening.

Further, if the user forgets to pass the washer through the bolt and tightens it by inserting the washer, the synthetic resin plate member cannot be pressed sufficiently, so that stable fixation cannot be achieved. Therefore, it takes a lot of trouble to manage parts on site.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention is a fastener for overlapping and joining a metal plate member and a synthetic resin plate member to each other, which is slightly shorter than the thickness of the synthetic resin plate member. A cylindrical sleeve having an inner hole penetrating on the central axis; a flange having at least the same diameter as the outer diameter of the sleeve at the base end of the shaft portion, penetrating the synthetic resin plate member through the inner hole, A means for solving the above-mentioned problems is provided by having a configuration including a bolt screwed into the plate member.

Further, by providing a knurl on the outer circumference of the sleeve, the sleeve is stably fixed to the synthetic resin plate member.

Further, by making one end of the sleeve larger in diameter than the other part, it is possible to disperse the compressive force applied to the metal plate member by tightening at the time of fixing and prevent deformation of the metal plate member. Greater versatility and reliability.

[0008]

Function: A female screw hole for a bolt is provided at a predetermined position of the metal plate member. On the other hand, the synthetic resin plate member is provided with a through hole having a diameter slightly smaller than the outer diameter of the sleeve at a position on the same central axis as the female screw hole when the synthetic resin plate member is superposed on the metal plate member.

After the sleeve is press-fitted into the through hole of the synthetic resin plate member until the tip reaches the bottom surface, a bolt with a flange is inserted into the inner hole of the sleeve. When the bolt is turned until the front end surface of the flange contacts the base end of the sleeve, the surface of the synthetic resin plate member is pressed with the surface slightly compressed and deformed,
The synthetic resin plate member and the metal plate member are tightly fixed to each other.

[0010]

EXAMPLE An example of the present invention will be described with reference to FIG.

The fastener 1 of the present invention comprises a sleeve 2 and a bolt 3.

The sleeve 2 has a cylindrical shape, and an inner hole 31 penetrates the central axis. The sleeve 2 is made to have a length slightly shorter than the thickness of the synthetic resin plate member as the adherend, and a non-slip knurl 23 is provided on the outer peripheral surface.

The bolt 3 is provided with a flange 32 at the boundary between the base end of the shaft portion 33 having the male screw 34 at the tip end and the head portion 31. The outer diameter of the flange 32 is at least the same as the outer diameter of the sleeve 2, and the shaft portion 33 has a length such that the shaft portion 33 can penetrate the synthetic resin plate member as the adherend and be screwed into the metal plate member. To be done.

All of them are preferably made of metal, and at least need to be made of a material harder than the synthetic resin plate member.

Next, a method of using the fastener 1 of FIG. 1 will be described with reference to FIG.

The metal plate member 11 to be adhered is, for example, a flange of an aluminum cylinder head of an engine, and at a position to be an adhering point, as shown in FIG. 2 (A), a female screw hole 13 for a bolt is formed. Is provided. The synthetic resin plate member 10 stacked on the surface side is, for example, a flange of a synthetic resin intake manifold, and the through hole 12 is provided at a position on the same central axis as the female screw hole 13 of the metal plate member 11.
Is provided. The through hole 12 has a diameter slightly smaller than the outer diameter of the sleeve 2 so that when the sleeve 2 is fitted, the sleeve 2 and the hole wall 14 of the through hole 12 are in close contact with each other and the knurling 23 is bitten and fixed. ing.

First, as shown in FIG. 2 (B), the sleeve 2 is press-fitted into the through hole 12 of the synthetic resin plate member 10 until its tip reaches the bottom surface of the synthetic resin plate member 10. Since the knurls 23 are provided on the outer peripheral surface of the sleeve 2, the knurls 23 are easily attached to the hole wall 14 to prevent the sleeve 2 from slipping out or sliding.

Next, the bolt 3 is attached to the inner hole 21 of the sleeve 2.
Insert from the base end until reaching the female screw hole 13 of the metal plate member 11, and turn to tighten. At this time, the length of the shaft portion 33 of the bolt 3 is longer than the thickness of the synthetic resin plate member 10,
In addition, it must be shorter than the total length of the thickness of the synthetic resin plate member 10 and the depth of the female screw hole 13 of the metal plate member 11.

After the flange 32 hits the surface of the synthetic resin plate member 10, the bolt 3 is further turned and stopped just when the flange 32 hits the base end 22 of the sleeve 2, as shown in FIG. 2 (C). , The surface of the synthetic resin plate member 10 is deformed along the flange 32 into a slightly recessed state, and the synthetic resin plate member 10 is sufficiently pressed by the flange 32 so that the synthetic resin plate member 10 and the metal plate member 11 are separated from each other. It is fixed in close contact with each other. Therefore, by fixing with the fixing device 1, two kinds of plates are sufficiently closely fixed and airtightness is maintained without installing a gasket or the like between the synthetic resin plate member 10 and the metal plate member 11. It is possible.

FIG. 3 shows a different embodiment of the present invention, in which one end of the sleeve 4 is provided with a large diameter portion 43 having a larger diameter than the other portion in a flange shape. Similar to the embodiment of FIG. 1, an inner hole 41 penetrates on the central axis, and the length of the sleeve 4 is made shorter than the thickness of the synthetic resin plate. Further, a non-slip knurl 45 is provided on the outer peripheral surface of the sleeve 4. The bolt 3 is exactly the same as the embodiment of FIG.

A method of using the fastener 1 shown in FIG. 3 will be described with reference to FIG.

The metal plate member 11 has a female screw hole 1 for a bolt.
3 is provided, and at a position on the same central axis as the female screw hole 13 when overlapped with the metal plate member of the synthetic resin plate member 10, it follows the shape of the sleeve 4 and is slightly smaller than the outer diameter of the sleeve 4. A through hole 16 having a diameter is provided. An enlarged diameter hole portion 18 into which the large diameter portion 43 is fitted is formed at the end portion of the through hole 16 on the bottom surface side.

First, as shown in FIG. 4 (A), from the bottom surface of the synthetic resin plate member 10, the sleeve 4 with the large diameter portion 43 as the base end, and the end surface on the large diameter portion 43 side and the synthetic resin plate member 10 are formed. It is fitted into the through hole 16 until it becomes flush with the bottom surface. In this case as well, the knurls 45 provided on the outer peripheral surface allow the through holes 1
It firmly bites into the hole wall 17 of 6 to prevent the sleeve 4 from slipping.

Next, the bottom surface of the synthetic resin plate member 10 is placed on the surface of the metal plate member 11, and the bolt 3 is inserted into the inner hole 4 of the sleeve 4.
Insert from the base end of 1 until reaching the female screw hole 13 of the metal plate member 11, and turn and tighten. Even if the flange 32 hits the surface of the synthetic resin plate member 10, the bolt 3 is further turned and stopped just when the flange 32 hits the base end 42 of the sleeve 4, as shown in FIG. The surface of the is deformed to be slightly depressed along the flange 32, the synthetic resin plate member 10 is sufficiently pressed by the flange 32, and the synthetic resin plate member 10 and the metal plate member 11 are fixed in close contact with each other. It

Moreover, in this embodiment, since the large diameter portion 43 is provided at one end of the sleeve 4 and the area of the end face 44 in contact with the metal plate member 11 is large, the tightening force at the time of fixing is dispersed, The compressive stress on the metal plate member 11 can be reduced. Therefore, the metal plate member 11 is attached to the sleeve 4
Even if it is softer, the metal plate member 11 can be prevented from being compressed and deformed, and the airtightness between the synthetic resin plate member 10 and the metal plate member 11 can be kept good.

[0026]

By using the fastener of the present invention, proper tightening strength can be easily secured without torque control.
There will be no over or under tightening. Therefore, the synthetic resin plate member is not damaged and the airtightness can be sufficiently ensured.

Further, since the number of types of parts is small, it is economical, and there is no need to forget to attach parts at the time of construction, and on-site work management is easy.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a method of using FIG.

FIG. 3 is a vertical sectional view showing another embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing the usage method of FIG.

[Explanation of symbols]

 1 Fastener 2 Sleeve 3 Bolt 21 Inner hole 31 Head 32 Flange 33 Shaft 34 Male screw

Claims (3)

[Claims] 1. A fastener for overlapping and joining a metal plate member and a synthetic resin plate member to each other; the fastener being a little shorter than the thickness of the synthetic resin plate member and having an inner hole penetrating on the central axis. A cylindrical sleeve having; a flange having at least the same diameter as the outer diameter of the sleeve at the base end of the shaft portion, passing through the synthetic resin plate member through the inner hole, and screwed into the metal plate member A fastener comprising: a bolt; 2. The fastener according to claim 1, wherein a knurl is provided on the outer peripheral surface of the sleeve. 3. The fastener according to claim 1, wherein one end of the sleeve has a larger diameter than the other portion.