JPS6214410Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of a female member equipped with an engaging part that is attached to a mounting member, and a male member that inserts a trunk into an insertion hole of this female member. Regarding a fastener in which male and female members are joined by mutually engaging a mating part and a complementary engaging part in a female member insertion hole, in particular, a radius between the mounting hole edge of the mounting member and the male member trunk is This ensures the engagement between the male and female members by creating a gap in the direction and preventing the force that is applied to the female member that comes into contact with the mounting member from being transmitted to the trunk when the female member is attached to the mounting member. In addition to stabilizing the resultant force, when attached to the mounting member, at least the male member of both the male and female members may be relates to a fasuna that can be relatively tilted or warped.

Conventionally, the male member is composed of both male and female members, and the male member trunk is inserted into the female member insertion hole to connect the two members, and the female member has a portion that engages with the edge of the mounting hole drilled in the mounting member. Many fasteners have been disclosed, and include fastening by inserting other parts between the head of the male member and the head of the female member, or between the head of the male member and the attachment member, or the head of the male member. It is designed to allow parts to be fastened to itself, and is ultimately used for fixing the parts to a mounting member.

However, all of these conventional fasteners have poor tolerance for the diameter of the mounting hole drilled in the mounting member, and if the diameter is too small, even if the female member can somehow be inserted into the mounting hole, The diameter of the trunk insertion hole becomes narrow, making it difficult or impossible to insert the male member trunk, or even if it is possible to insert the male member, it becomes unsuitable for applications where a predetermined engagement force must be maintained. It may become unusable in applications where it is necessary to be able to pull out parts.

In particular, when the male and female members are combined in advance and then inserted as a whole into the mounting hole and fastened at once, the insertion hole of the female member may be completely filled with the trunk of the male member. Therefore, if the diameter of the attachment hole is too small, there will be no room for the female member to bend in the radial direction, making it impossible to insert it at all.

These defects are caused by the fact that the wall defining the insertion hole into which the male member trunk is inserted is configured such that its inner surface abuts the insertion hole, and its outer surface directly faces the inner surface of the mounting hole. This is due to the fact that when the wall portion becomes smaller, the outer surface of the wall portion receives an inward force, which causes a deflection of the inner surface and is transmitted to the male member trunk, or narrows the insertion hole diameter of the male member trunk.

The present proposal has been made in view of the above, and includes providing a radial gap between the trunk of the male member and the inner surface of the wall of the body of the female member defining the insertion hole into which the trunk is inserted. By making the wall flexible, even if the part where the female member contacts the mounting hole receives force inward in the radial direction due to the narrowing of the hole diameter, the force will not be absorbed by the main body. The main purpose is to provide a fastener that prevents transmission of power and allows the male and female members to be assembled in advance and then installed in the mounting hole, or to allow the male member to be tilted or warped as necessary. It is something.

Hereinafter, a preferred embodiment constructed according to the present invention will be described with reference to FIGS. 1 to 6.

In the fastener of this embodiment, parts that are not directly related to the gist of the subject matter are shown in as simple a form as possible.

The male member 1 shown in FIG. 1 consists of a head 2 of an appropriate size and a trunk 3 that hangs down from the head 2, and a portion of the trunk, in this case the lower end, is at its maximum diameter. The spherical engaging portion 4 does not protrude much beyond the cross-sectional diameter of the trunk.

On the other hand, as shown in FIG. 2, the female member 5 has a head 6 that comes into contact with one side of the mounting member, and a body 7 that hangs down from the head 6.
An insertion hole 8 is bored inside the head 6 through the head 6, and the body portion surrounding the insertion hole 8 forms a wall 9.

This female member 5 is further provided with a fastening means for fastening to the mounting member, but in this embodiment, a fastener that is most easily used in this type of fastener is used, and the fastener of the wall portion 9 is A plurality of engagement ribs 10 are provided on the outer surface at appropriate intervals in the circumferential direction and protrude outward in the radial direction.

The upper end surface of this engaging means or rib 10 is a shoulder surface with a distance from the lower surface of the female member head 6 that is equal to or slightly narrower than the thickness of the peripheral edge of the mounting hole of the mounting member P, which will be described later. It is becoming.

In this embodiment, there are characteristic features not found in conventional fasteners of this type. First of all, the inner diameter of the insertion hole 8 of the female member is larger than the outer diameter of the male member trunk 3. , only the complementary engaging part 11 that engages with the engaging part 4 provided at the lower end of the male member trunk 3 has a shape that exactly matches the shape of the trunk engaging part 4 (spherical in this case). There is.

In order to more clearly illustrate this configuration, for convenience, the process of attaching the fastener to the attaching member will be described later, and first the state at the time when the fastener has been fixed to the attaching member P will be shown and explained in Fig. 3. .

The female member 5 fits into the mounting hole Hp of the mounting member P and holds the mounting member P between the lower surface of the head 6 and the engaging means (rib) 10, while the trunk 3 of the male member 1
is inserted into the insertion hole 8 without touching the inner surface of the wall portion 9 that defines it, and only its engaging portion 4 engages with the complementary engaging portion 11 on the insertion hole side, so that both male and female members Engagement is complete.

Therefore, a radial gap S is formed between the inner surface of the wall portion 9 and the member trunk 3, and therefore, as shown in FIG. 4, the diameter of the attachment hole Hp becomes smaller and the female member Even if the portion of the wall portion 9 of 5 facing the inner surface of the mounting hole is distorted inward, the distortion occurs within the gap S, and the main body 3 is subjected to an unexpected force other than the engagement force between the engagement portions 4 and 11. The engagement force can always be kept constant without applying additional force.

Of course, conversely speaking, the wall portion 6 needs to have appropriate flexibility so that it can be distorted as described above.

As mentioned above, the basic effect of this proposal is that sufficient mounting hole diameter tolerance can be obtained while keeping the engagement force constant. There are many.

One of them will become clear as we follow the process of attaching the fastener of the present invention to the attaching member.

Conventionally, when attaching this type of fastener to the attachment member P, the female member is attached to the attachment member in advance and then the male member is inserted. First, the case of attaching the fastener shown in the first figure using this method will be explained. In addition, here,
It is assumed that another component W is sandwiched between the attachment member P and the lower surface of the male member head 2.

First, when the female member 5 is inserted from the tip of the body 7 into the attachment hole Hp of the attachment member P, the rib 10 as an engaging means standing up on the outer peripheral surface of the body (wall) is inserted into the attachment hole. When the rib 10 hits the edge and continues to be pushed in, the rib 10 continues to fit in while being subjected to a radially inward force at the edge of the hole or the inner surface of the hole. Naturally, at that time, the wall portion 9 in the area where the rib 10 is provided is bent and deformed inward in the radial direction.

Eventually, when the upper end surface of the rib 10 exceeds the exit edge of the mounting hole, the wall portion 9 that had been bent returns to its original state, and the upper end surface of the rib is positioned around the exit edge of the mounting hole.
At this point, the lower surface of the female member head comes into contact with the mounting member P, and as mentioned above, the lower surface of the head is equal to or slightly narrower than the wall thickness of the peripheral part of the mounting hole of the mounting member P. The mounting member P is sandwiched between the upper end surface of the rib and the upper end surface of the rib, and the female member itself becomes fixed to the mounting member P.

Next, the part W is placed on the mounting member, and the part W has a through hole Hw having a size to receive at least the head 6 of the female member.

Thereafter, the male member is inserted into the female member insertion hole 8 from the tip of the trunk, and its engaging portion 4 is engaged with the complementary engaging portion 11 on the insertion hole side, so that the lower surface of the male member head and the attachment member P The part W is held and fixed between them.

However, in the case of conventional fasteners, if the diameter of the mounting hole becomes even slightly narrow due to manufacturing tolerances, the wall portion 9 cannot be completely restored from the bent state inside the mounting hole when inserting the female member, and as a result, Since the diameter of the insertion hole remains in a narrowed state even after the fixation is completed, subsequent insertion of the male member trunk into the insertion hole becomes extremely difficult or, in severe cases, completely impossible.

Even with conventional models, if you always leave a gap between the outer wall of the wall that defines the insertion hole and the inner surface of the mounting hole, the diameter tolerance of the mounting hole will come out, but if you do that,
This inevitably causes the female member to wobble in the lateral direction.

On the other hand, in the fastener of this embodiment, in order to eliminate looseness, the outer surface of the wall portion 9 can be made to be in close contact with the inner surface of the mounting hole, and even though the manufacturing tolerance can be You won't have to ask too many questions. For example, even if the wall portion 9 is bent inward due to too close contact, there will be no problem in inserting the male member trunk 3, and the fixing force will be increased, making it even more comfortable. (See Figure 4 again).

As shown in Fig. 5, a method that is significantly superior to the above-mentioned mounting methods in terms of workability is to overlap the mounting member P and the component W in advance and make the mounting holes.
There is a method of aligning Hp with the component through-hole Hw, and then pushing the entire fastener, in which the male member 1 is previously connected to the female member 5, into the attachment hole Hp all at once.

In the case of the present invention, this method can be adopted without any problem, whereas with conventional fasteners of this type, such a method is difficult or impossible.

This is because, in the case of conventional fasteners, the insertion hole is completely filled with the trunk of the male member when the male and female parts are connected in advance, so it is difficult to install the entire fastener. This is because there is no escape for the radially inward force that the ribs 10 receive when the ribs 10 are inserted into the holes, and therefore the wall portion having the ribs does not bend inward. Conventionally, in order to make such attachment possible, it is impossible unless there is a considerable margin in the diameter of the attachment hole. However, if the diameter is made such a large one, as mentioned above, looseness after installation becomes a problem.

However, even in conventional fasteners, if a flexible part with slits on three sides and the remaining side is used as a fulcrum is used instead of the fastening rib, the inward force can be absorbed by the flexible part. Such a fastening means requires a complicated manufacturing mold, is relatively expensive, and has the disadvantage that the structure is specific.

Furthermore, even if there is a gap between the wall of the female member and the male member, such as the fastener disclosed as a conventional example in Japanese Utility Model Publication No. 49-3900, the mounting Considering the process of This means that there is no gap between it and the inner surface of the mounting hole.

Therefore, if the hole diameter becomes narrower, a higher insertion force is required, and if the hole diameter becomes larger, the engagement force between the male and female members becomes insufficient.

In this regard, according to the fastener of the present invention, since there is a gap S in the female member insertion hole, even a simple rib-like fastening means is allowed to bend inward when engaging with the edge of the mounting hole. , the male and female members are attached to a portion that is almost unrelated to the deflection of the locking means, that is, a portion of the male and female members after the fulcrum of the deformation or deviation when viewed from the point of force where the locking means 10 and the mounting hole edge are in contact. Since there is an engaging portion, even if the diameter of the mounting hole Hp varies, the mounting force or insertion force will not vary greatly, and a convenient mounting method can be used that integrates both the male and female members.

In addition, in the fastener of the present invention, at least the male member 1 of the two female and male members is allowed to tilt or warp relative to the steady axis of the fastener, which is effective in installation after the male and female members are integrated and in the pulling-out process described below.

In order to make it possible to pull out the male and female members after installation, it is desirable that the engaging portions of the male and female members be spherical as shown in the figure. When removing the male member 1 together with the part W by flipping it up, the male member 1 must be unlatched as shown in FIG. It tilts diagonally around the center of engagement O between the joining parts 4 and 11 as a fulcrum, or receives a force that causes it to warp outward in the radial direction as it moves toward the head side.

In the figure, the imaginary line extending straight upward from the fulcrum O can be considered to be the steady axial center line of this fastener, and this axial center line is
It can be defined as being parallel or almost parallel to the axis of the mounting hole Hp.

However, in conventional fasteners, the outer peripheral surface of the male member trunk is tightly pressed against the inner wall surface of the insertion hole, so it cannot tilt or warp, and the fastener is subjected to excessive force. There was a risk of damage to any part of the part W or cracks in the part W.

On the other hand, when a gap S is defined around the main body 3 over almost the entire length as in the fastener of this embodiment, when the part W is turned up as shown in the figure and a handhold is attached, etc. Also, the male member 1 is well adapted to the engagement center O as a fulcrum and can be easily tilted or warped with respect to the axis in a steady state, and the force for pulling out the male member when grasping and pulling up the part W is also minimized. It requires only a limited amount of force, and work efficiency is significantly improved.

This effect is especially great when a part W of a certain size is fastened at multiple locations with multiple fasteners. In contrast to the fact that the fuasuna was overloaded, the fuasuna of the present invention disclosed in this example has
There is no problem in using the most convenient method for pulling out the part, such as holding a part of the part W and pulling it up diagonally.

After pulling out, attach the part W to the mounting member P again.
To attach the male member, simply reinsert and reengage the male member with the female member that remains attached.

In addition, for applications where pulling out is not necessary or does not need to be done very often, or where reuse is not a consideration, the shape of the engaging part may of course be made to have a stronger non-returning property. Furthermore, this fastener is used not only to sandwich the component W, but also to appropriately deform the male member head 2 so that an article can be hung there, and when fixing the component W. W has a male member head shaped like two flanges with a gap between them, and is sandwiched between these two flanges,
As a result, it may be attached to the attachment member P.

Furthermore, in this first embodiment, the male member head 2 is shaped like a suction cup, but this is done to ensure that the head 2 is in sufficient contact with the component W, so that the tolerance of the plate thickness can be improved. This is done for various purposes, such as to ensure water tightness, and to prevent the entire head from being flipped up all at once when a tool, etc. is inserted under the head when pulling out the male member. However, of course, this is essentially a matter of arbitrary design.

The first embodiment of the present invention has been explained above with reference to FIGS. 1 to 6, but now from a different perspective, while maintaining the various basic effects of the above-mentioned present invention, An improved embodiment as shown in FIG. 7 can be proposed as an embodiment most suitable for applications in which the male member does not tilt or wobble too easily.

That is, in the gap S facing the trunk 3, the ribs 13 (shape and number are arbitrary) whose end surfaces are in contact with the wall portion 9
is established for the relevant executive 3.

It is important that this rib 13 be relatively thin and sufficiently weak in strength compared to the elasticity of the wall portion 9. If this is done, the diameter of the mounting hole is narrow and the wall portion Even if 9 bends inward, this weak rib can deflect in the same way and prevent the cadre 3 from being affected, while preventing the cadre from wobbling unnecessarily under normal conditions. It can be prevented.

Further, on the inner surface of the wall portion 9 of the female member 5, a rib that lightly presses against the circumferential surface of the trunk 3, for example, a plurality of ribs extending in the axial direction may be provided. In this case, when removing the component W from the mounting member P, it is possible to prevent the male member from being blown away.

That is, in the embodiment described above, when removing the component W from the mounting member P, the engaging portion 4 of the male member 1
When it comes out of the complementary engagement part 11 of the female member,
There is a risk that the force of the female member engaging portion 11 returning from its bulge may cause the male member 1 to be thrown away, but if the axial rib is provided as described above, the male member 1
The engaging portion 4 is caught on this rib or is subjected to frictional resistance, which has the effect of preventing it from popping off.

As detailed above, according to the present invention, in this type of fastener consisting of male and female members, it is possible to provide tolerance in the diameter of the mounting hole, ensure the engagement of both the male and female members, and maintain a constant engagement force. An extremely effective fastener that simplifies installation and removal work can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a male member of an embodiment of the present fastener, Fig. 2 is a half-sectional side view of a female member of the same embodiment, and Fig. 3 is a side view of the female member of the same embodiment. FIG. 4 is a longitudinal sectional view similar to FIG. 3 when the mounting hole diameter is narrowed; FIG. 5 is an explanatory diagram showing an example of the fastener mounting method of the embodiment; FIG. 6 is a longitudinal sectional view similar to FIGS. 3 and 4 in a state in which the male member begins to be disassembled, and FIG. 7 is a longitudinal sectional view of the second embodiment of the present invention. In the figure, 1 is the male member, 2 is the head, 3 is the trunk, 4 is the engaging part, 5 is the female member, 6 is the head, 7 is the body, 8 is the insertion hole, and 9 is the female member. A wall part located in the body part and defining an insertion hole, 10 is a fastening means, 11
is a complementary engagement part on the insertion hole side, S is a radial gap,
It is.

Claims (1)

[Scope of claim for utility model registration] A male member consisting of a head and a trunk hanging from the head; A head and a trunk hanging from the head; an insertion hole into which the body is inserted, and a female member provided on the outside of the body with a fastening means for engaging a mounting member having a mounting hole through which the body is inserted; The trunk of the male member and the insertion hole of the female member are provided with complementary engaging portions that engage with each other, and when attached to the mounting member, the axis of the mounting hole in the steady state. A fastener having an axis parallel or substantially parallel to the center; a wall portion of the body defining the male member trunk insertion hole of the female member, and facing the wall portion from the inside in the radial direction; A gap is provided between the male and female members; the engaging portion between the male and female members is provided at a position that does not directly receive the contact force between the locking means and the mounting member; The lower end of the member is adapted to contact the solid portion of the female member and transmit the downward force applied to the male member to the female member; Among the two members, at least the male member has flexibility in the wall of the body of the female member in order to allow relative tilting or warping with respect to the axis and to provide tolerance for the diameter of the mounting hole. A Huasuna characterized by;