JPS6018652Y2 - Fixture - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fixture suitable for attaching a cowl panel of an automobile.

For example, in a typical automobile, it is necessary to attach a so-called 'h cowl panel, which serves as a panel that serves as a ventilation hole, to a portion of the body between the windshield and the bonnet.

However, in the past, this cowl panel was attached to a corresponding part of the body using ordinary screws.
This resulted in extremely poor workability.

In addition, it is troublesome not only to install it, but also to remove it for repairs and inspections. In particular, you have to put your hands on the back side and hold down the screw or nut before twisting the nut or screw on the other side, which is just troublesome. There was also a risk of damaging the hands, and there was also the problem of rust forming at the mounting part.

On the other hand, conventional fixing devices that can be operated on one side are shown in FIGS. 3 to 5 of Japanese Patent Application Laid-open No. 50-6665.

To explain briefly, there is a difference between a hollow stopper and a middle stopper that is inserted into the hollow part of the stopper. By screwing into the part, the lower end part is expanded, and the object to be fastened is sandwiched between the expanded lower end part and the upper head, and the object to be fastened is fixed to the object.

However, this fixing device is extremely inefficient because i) the work of attaching the inner stopper to the hollow stopper, that is, the fixing work involves twisting the screw several times; Since it is planned to fit together, the diameter tolerance of the mounting hole is extremely poor; that is, the expansion of the lower end when the female thread on the inner surface of the lower end of the hollow plug just engages with the thread of the inner plug. Since the degree of rotation is constant, if the hole is of a small diameter, the lower end may not be able to fully expand, damaging the screw thread that is being forced into the hole, or if the hole is of a large diameter, the bottom end may not be able to fully expand. iii) Diameter variation within the diameter tolerance range (extremely narrowing is mentioned above) directly causes variation in the force with which the inner edge of the hole tightens the lower end, and the screw fastening force This has disadvantages, such as that it is difficult to maintain a constant fixing force, and the twisting torque and, therefore, the working force when twisting and removing the inner stopper as necessary vary greatly.

The present invention has been developed in light of the above, and provides a fixing device that enables one-sided operation when attaching and detaching the cowl panel to the body, improving work efficiency, and solving the drawbacks of the conventional fixing devices mentioned above. The main purpose is to

Of course, this fixture can also be applied to other fixing applications.

The illustrated embodiment will be described in detail below.As an example, the articles to be fastened are a body 1 and a cowl panel 2, as shown in FIG.
The fixture 4 of the present embodiment is inserted into the series of through holes, and a sealing member 8 made of synthetic resin or rubber is sandwiched between them to be fixed.

This sealing member 8 is therefore also provided with an opening that matches the through hole drilled in the cowl panel and the body.

The fixture 4 of the present invention includes a male member 9 and a female member 10, both of which are made of plastic.

The male member 9 has the shape of a normal bolt, and is connected to a head 11 and a shaft punch 12 hanging from the head, and a screw thread 13 is provided from just below the head of the shaft punch 12 to the middle of its length. The diameter of the portion 12a from the lower end of the thread to the tip of the shaft frame is reduced in order to save material.

However, there may be a continuous male threaded portion 13 up to the tip.

The female member 10 has a series of through holes (
Furthermore, in this embodiment, the body part 14 is fitted into the sealing member (including the through hole of the seal member) 3 and has its tip protruded through it, and a head part 15 that rests on the cowl panel. The body part 14 hanging down has four elements 16, which in this case are cut at 90 degrees from the tip and fixed at the base by the head.

In this case, if you trace the outer periphery of the body element continuously, it becomes a roughly circular shape, and the through holes (
The seal member 8 (including the through hole) is also oval in shape to prevent rotation.

In addition, the trunk elements are fixed at the base to the head and each has a free end at the tip, but the number is not limited as long as it has a certain length and can be expanded in diameter. It would be nice to have a pair facing each other.

It should be noted that the detent is not limited to an ellipse as long as it is non-circular; for example, a protrusion or groove may be provided on the back surface of the female member's head.
A mechanical method may also be considered in which this is fitted into a groove or a protrusion provided on a member to be attached, such as the surface of the cowl panel attachment site.

From the upper surface of the head 15 to the middle of the length of the body element 16..., there is a receiving hole 17 with a diameter that allows the male member shaft frame 12 to be comfortably accommodated therein.
However, in the vicinity of the tip of the body, only a space 18 with a diameter much smaller than the diameter of the shaft frame remains, even though it is continuous with the receiving hole.

Conversely, the small diameter space portion 1 is reduced by the inward bulge 18'.
8 is formed.

A screw 19 on the female member side is formed on either the inner wall surface of the head along the receiving hole 17 or the non-expandable portion above the body, in this case on the inner wall surface of the head.

To explain in advance, as shown in the second diagram, the male member 9 is connected to the female member 1.
0, the tip of the shaft frame simply has the role of enlarging each body element 16, and the maintenance of this state is left to the fitting relationship of the screws 13 and 19 arranged as described above. It has become.

In this case, the female screw 19 on the female member side does not extend around the entire circumference of the wall surface of the receiving hole, but is shaped like a small protrusion that protrudes only from a part of the wall surface as shown in the first figure, and is a mere bulge. It is rounded so as not to crush itself or the screw threads 13 of the male member shaft frame 12 during the pushing operation.

The cowl panel is attached using the fixture 4 as follows.

First, in this case, after positioning the cowl panel while sandwiching the sealing member 8 and aligning the through hole 3 with the body 1, the shaft punch 12 of the male member 9 is placed in the receiving hole 17, and the screw 13.1 is inserted.
9, the female member 10 to which the male member is temporarily attached is passed through the series of holes from the tip of the body 14, and the female member head 15 is brought into contact with the panel.

In addition, even if the positions of the through holes are slightly different for each member during the initial installation work into the through holes 3, the outer periphery of the tip of the body element, which is the insertion end of the female member, will be as shown in the figure. Since the tapered surface 22 has a rounded shape, this tapered surface acts as a guide surface, and the insertion operation can be performed smoothly without getting caught on the hole edge.

From this state, force is applied to the head 11 of the male member 9 to push it further into the female member.

Then, the tip of the shaft frame 12 is forcibly pushed into the inner surface near the tip of each body element 16 or into the small diameter space portion 18 between the bulges 1B' and 1B', and as a result, each body element 16 The protruding part on the back of the body bulges outward.

Therefore, in the series of through holes 3, forcible contact is observed at the outer circumferential edge 16' of each barrel element with an enlarged diameter on the back side of the body, and at the head 15 of the female member 10 on the cowl panel side. , Also, since this state cannot be released due to the relationship between both screws 13 and 19, the cowl panel and the sealing means,
It will be firmly fixed to the body.

As described above, the installation of the cowl panel is essentially
This was done simply by pushing the male member in on one side, but since a screw-fitting relationship is used for the frictional force that maintains this state, it is also possible to remove it.

That is, from the completed installation state shown in the second figure, the head 11 of the male member
, the male member shaft rod thread 13 and the female member body end female thread 1
If the male member 9 is rotated in the direction in which it is unscrewed, the male member 9 will gradually float, and when the tip of the punch eventually comes off the small diameter portion 18 at the tip of the body, the female member 9 will be removed as shown in the first figure. Each body element 16 is restored by its own elasticity, and can be disassembled by picking up the female member along with the male member.

In order to facilitate rotation of the male member at this time, in this embodiment, a groove 21 (imaginary line) into which the tip of the driver is received is bored in the head 11 of the male member.

Thus, when rotating the male member, it would be inconvenient if the female member also rotated, but in this embodiment, there is no risk of this since there is a rotation preventing means.

The embodiments of the present invention have been described in detail above, but according to the present invention, the fixing work can be done by simply pushing the male member 9, and there is nothing better than this.

If it is simply pushed in, each thread of the threaded part of the male member will forcibly advance over each thread of the threaded part of the inner wall surface of the receiving hole into which the male member of the female member is inserted. This is possible due to the elasticity and smoothness of the material and the roundness of one screw, and there is no risk of the screw thread being damaged.

Incidentally, the screw thread may not only have a shape that extends all the way around the inner wall surface of the receiving hole as its original shape, but may also have a partial shape as shown in the previous embodiment.

In addition, in accordance with the gist of the present invention, the female thread and the male thread only need to have complementary shapes that allow them to ride over each other in the axial direction without damaging each other, such as the one shown in the figure. It is not specified.

With such a shape relationship, even if the male and female parts are disassembled by twisting if necessary, the threads of the male and female parts disassembled in this way will be the same as new ones. Therefore, one of the effects expected from the structure of the present invention is that it can be reused.

Further, even if the diameter of the attachment hole or the through hole 3 changes and the force applied to the body element or the degree of expansion changes, there is no fear that the engagement force between the male and female members will change as in the conventional example.

This is because the screw 19 is provided in the non-expandable portion on the head side.

In addition, when removing the cowl panel as necessary, it is possible to forcefully pull it out instead of twisting the male member as described above, but in practice it is difficult to remove the cowl panel by pulling a tool or the like. Since a hook for hanging is required on the male member, there is an undeniable drawback that it becomes more complicated and larger.

In addition, it is not necessary to remove it very often, and it is desirable to be careful not to damage the surrounding parts when removing it, so in that sense, it is better to rely on twisting the male member, which can be removed carefully. is safe.

Furthermore, in the embodiment described above, the body part 14 is made into a body element 16 having a plurality of free ends by making a cut from the tip.
It is divided into ..., but the point is that it is fine as long as the body element can be expanded, so by inserting a window in the body, the tip is joined, but the part next to the window above it is Parts may be expanded.

That is, in accordance with the illustrated embodiment, the portions of each guide surface 22 beyond the bulge 18' of the body 14 are pushed further downward and connected to each other, and the cut is closed at the lower end of the connection. You can also consider the shape of a window.

In this case, when viewed as a whole, the bulge 18' is located halfway along the length.

Further, although the guide surface has a longer guide length, it has the same function as described above to allow irregularities in the hole.

Further, the head of the female member is of course not limited to the shape shown in the drawings, but may be in the form of a long substrate, or the heads may be connected to each other.

As described in detail above, according to the present invention, when attaching a cowl panel to a body, etc., it is easy to install as a fixing device for multiple components, and it is also removable. Great additional effects can be expected, such as the fact that irregularities can be absorbed by the guide surface, and it is possible to transport the male and female members in a temporarily assembled state, and to prevent them from falling off or being lost.

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[Brief explanation of drawings]

FIG. 1 is an exploded configuration diagram of the embodiment of the present invention, FIG. 2 is a side sectional view after the installation is completed, and FIG. 3 is a bottom view of the female member. In the figure, 1 is a vehicle body, 2 is a cowl panel, 3 is a series of through holes drilled in the body and cowl panel, 4 is a fixing device as a whole, 9 is a male member, 10 is a female member, and 12 is a male member shaft a frame, 13 a threaded portion provided on the shaft frame, 14 a female member body portion, 1
6 is a body element, 17 is a male member shaft receiving hole, 18 is a small diameter portion, and 19 is a female screw portion provided on the inner wall of the receiving hole of the female member.

Claims (1)

[Claims for Utility Model Registration] A fixture that separates a female member and a male member inserted into the female member, the male member having a head and a head that hangs down from the head and extends at least to the head. The female member is made of a synthetic resin and is made of a shaft frame having a male threaded portion in a portion near the part, while the female member is made of a head;
The body part hanging down from the head part is integrally molded of synthetic resin, and the body part has at least a pair of expandable body part elements, and the body part is extended from the head part of the female member to the body part. A receiving hole for accommodating the male member shaft is bored in the middle of the length of the body element, and a small diameter space portion having a diameter smaller than the diameter of the shaft frame is provided below the receiving hole of the body element. In addition, a female threaded portion that engages with a male threaded portion of the male member shaft is provided in a portion of the inner wall surface of the receiving hole that does not expand, and the shape of the male threaded portion and the female threaded portion is . A fixture characterized in that the male member shaft rods have complementary shapes that allow them to axially climb over each other when inserted into the female member receiving hole in the axial direction.