JPH08270632A - Temporarily holding clip and method of mounting underfloor part on vehicle by using the temporarily holding clip - Google Patents

Abstract

PURPOSE: To attain improved workability by performing temporarily stopping an underfloor mounting part without using tightening a nut. CONSTITUTION: A temporarily holding clip A, provided with a tube part 1 formed of resin into a tubular shape and a temporarily stopping protrusion 3 protruded outward from the periphery of the tube part 1, is mounted in the periphery of a bolt 4a of a heat insulator 4, to stop a bolt 4a and the temporarily holding clip A, after inserting the temporarily stopping protrusion 3 while elastically deforming it in a direction of contracting a diameter from an underfloor side relating to a bolt inserting hole 5a of a floor panel 5, to an upper side of the floor panel 5, and by this stopping, the heat insulator 4 is temporarily stopped to the floor panel 5. In the end, a nut 6 is tightened to the bolt 4a from an upper side of the floor panel 5 till crushing the tube part 1 of the temporarily holding clip A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary holding clip used for mounting an underfloor mounting part such as a heat insulator mounted on the underside of a vehicle floor panel, and a method for mounting a vehicle underfloor mounting part using this clip.

[0002]

2. Description of the Related Art Conventionally, under the floor panel of a vehicle,
Various underfloor mounting parts such as a muffler, a heat insulator that shields the heat of the muffler, and a fuel tank are attached. For example, in June 1991, on page B-36 of the new model car manual (C23-1) issued by Nissan Motor Co., Ltd., it is shown that the heat insulator is installed under the floor panel. The mounting structure is such that multiple bolts are erected on the heat insulator, and each bolt is inserted from the bottom of the floor into the floor through the bolt insertion hole formed in the floor panel, and the nut is fastened to the bolt from the top of the floor panel. Has been.

In such a method of mounting the underfloor mounting component, first, the underfloor mounting component is arranged on the lower side of the floor panel, and the bolts erected on the underfloor mounting component are inserted into the bolt insertion holes of the floor panel from the underfloor side. Then, while holding that state with one hand, turn it to the upper side of the floor panel with the other hand, tighten the nut to the bolt by hand, and finally fix it to the upper side of the floor panel. The procedure is to fully tighten each nut.

[0004]

However, in the above-described conventional mounting method, since the underfloor mounting parts are temporarily fixed to the floor panel by temporarily fixing the nuts to the bolts (hand tightening), It had the problems mentioned.

When the mounting work is performed by one person, it is necessary to hold the underfloor mounting part under the floor panel with one hand while manually tightening the nut from the upper side of the floor panel with the other hand. bad. In addition, when installing underfloor mounting parts on the floor panel under a floor panel so that one person cannot hold his / her hand under the floor panel and cannot rotate his / her hand above the floor panel, arrange workers above and below the floor panel. It becomes necessary to perform the installation work by two people, and workability is also poor in this respect.

The present invention has been made by paying attention to the conventional problems as described above, and it is possible to improve workability by temporarily fixing the underfloor mounting parts without using nuts. To aim.

[0007]

In order to achieve the above object, in the temporary holding clip according to the first aspect of the present invention, a cylindrical portion formed of an elastically deformable resin in a cylindrical shape, and the cylindrical portion are integrated. And a temporary fixing protrusion protruding outward from the outer periphery of the cylindrical portion, the temporary fixing protrusion being outside when the cylindrical portion is press-fitted into the hole from the tip side. It is configured such that it is elastically deformable in the direction of reducing the diameter and is shaped so as to be locked to the edge portion of the hole from the base end side of the tubular portion.

In the temporary holding clip according to the second aspect of the invention, a thin-walled bending guide portion is formed in the circumferential direction in the middle portion of the tubular portion.

According to the third aspect of the present invention, the floor panel is constructed by inserting a bolt standing on an underfloor mounting component attached to the lower side of the floor panel of the vehicle into a bolt insertion hole formed in the floor panel. A method of mounting an underfloor mounting part for fastening an underfloor mounting part to a floor panel by fastening with a nut from above, wherein the inner diameter is slightly smaller than the outer diameter of the bolt. The tubular portion of the temporary holding clip described above is attached to the outer circumference of the bolt with the proximal end of the tubular portion facing the proximal end side of the bolt, and then the underfloor mounting component is placed below the floor panel. , The bolt and the temporary holding clip attached to it,
In the direction of shrinking the outer diameter of the temporary fixing projection from below the floor with respect to the bolt insertion hole which is formed in advance to have a size larger than the outer diameter of the cylindrical portion and smaller than the outer diameter of the temporary fixing projection. After elastically deforming and inserting it through the bolt insertion hole, lock it on the upper side of the floor panel and temporarily lock the underfloor mounting member to the floor panel by this locking, and finally, from the upper side of the floor panel, temporarily fix the nut from the upper side. An attachment method was used in which the tubular portion of the holding clip was fastened to the bolt until it was crushed.

[0010]

The procedure for attaching the underfloor mounting component using the temporary holding clip according to claim 1 or 2, that is, the procedure for the mounting method according to the third aspect of the invention will be described. The tubular portion of the temporary holding clip is attached to the outer circumference of the upright bolt. In this case, the base end of the tubular portion faces the base end of the bolt.

Next, the underfloor mounting component is arranged at a predetermined mounting position on the lower side of the floor panel, and the bolt with the temporary holding clip is inserted into the bolt insertion hole formed in the floor panel from the underfloor side. Insert it upwards. At this time, the temporary holding projection of the temporary holding clip passes through the bolt insertion hole while being elastically deformed in the direction of shrinking the outer diameter by being press-fitted into the bolt insertion hole, and after passing through, returns to the original shape. So that the outer diameter position is located outside the bolt insertion hole.

Next, when the hand is released from the underfloor mounting part, the underfloor mounting part falls by its own weight, but the temporary fixing projection of the temporary holding clip whose outer periphery is located outside the bolt insertion hole is a bolt. It is locked to the floor panel at the peripheral portion of the insertion hole, so that the underfloor mounting component is temporarily held on the floor panel.

Next, a nut is fastened to the bolt from the upper side of the floor panel. At this time, if the nut is tightened in the direction of the base end of the bolt, the tubular part of the temporary holding clip and the temporary fixing projection are sandwiched between the nut and the floor panel and deformed and crushed between them. Be done. In addition, in the temporary holding clip according to claim 2, at this time, the thin bending guide portion provided in the middle of the tubular portion is bent into a V-shaped cross section, and is crushed in a folded state in two. Be done.

In the mounted state as described above, rainwater which tries to enter from below the floor into the bolt insertion hole is tentatively held by a resin which is crushed between the nut and the floor panel. Sealed by clips. In this case, the temporary holding clip according to claim 2 has a high sealing property because the tubular portion is crushed by being guided by the bending guide portion and folded.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, the structure of the temporary holding clip A according to the second embodiment of the invention will be described.

FIG. 2 is a perspective view showing a temporary holding clip A. The temporary holding clip A is integrally molded of heat resistant polypropylene which is a soft synthetic resin having a predetermined elasticity.
Reference numeral 1 is a cylindrical portion formed in a cylindrical shape. As shown in the sectional view of FIG. 3, a thin bending guide groove (bending guide portion) 1a is formed in the middle portion of the tubular portion 1, and the base end portion (lower end in the figure) of the tubular portion 1 is formed. A disk-shaped flange portion 2 is formed on the outer circumference.

Further, on the outer periphery of the cylindrical portion 1, four temporary fixing projections (temporary fixing projections) 3 are provided so as to project outward. These temporary fixing projections 3 are formed in such a shape that the cylindrical portion 1 is cut and raised and spreads outward from the tip portion (upper end portion in the figure) of the cylindrical portion 1 toward the lower side, and the tip thereof is inward. The claw portion 3a is formed by being bent. In the figure, reference numeral 1b is an opening of a mark obtained by cutting and raising the temporary fixing projection piece 3.

Next, an underfloor mounting component to be mounted on a vehicle using the temporary holding clip A of this embodiment will be described.

FIG. 4 is an exploded perspective view for explaining the mounting of the heat insulator 4 as an underfloor mounting component. The heat insulator 4 shields the heat of the muffler.
It is attached to the floor panel 5 by interposing it between a muffler (not shown), and three bolts 4a are erected on the upper surface.

Further, the floor panel 5 is formed with three bolt insertion holes 5a corresponding to the arrangement of the bolts 4a. Reference numeral 6 in the figure denotes a nut that is fastened to the bolt 4a.

Next, the mounting method of the embodiment of the invention according to claim 3 in which the heat insulator 4 is mounted on the floor panel 5 using the temporary holding clip A of the embodiment will be described with reference to FIG. In addition, in this attachment, as the temporary holding clip A, the inner diameter of the tubular portion 1 is slightly smaller than the outer diameter of the bolt 4a, and the axial dimension of the tubular portion 1 is shorter than the total length of the bolt 4a ( Use about half. Further, the bolt insertion hole 5a is formed to have a size larger than the outer diameter of the tubular portion 1 that satisfies the above conditions and smaller than the outer diameter of the flange portion 2 and the maximum outer diameter portion of the temporary fixing projection 3. Keep it.

First, as shown in FIG. 1A, the cylinder portion 1 of the temporary holding clip A is attached to the bolt 4a provided upright on the heat insulator 4, and the flange portion 2 is the upper surface of the heat insulator 4. Press it to the position where it comes into contact with.
In this case, since the inner diameter of the tubular portion 1 is slightly smaller than the outer diameter of the bolt 4a, the tubular portion 1 is elastically deformed in the radial direction, and moreover, it is difficult to get into the screw thread and come out of the bolt 4a.

Next, the heat insulator 4 is placed below the mounting position of the floor panel 5, and the bolt 4a to which the temporary holding clip A is attached is further inserted into the bolt insertion hole 5.
Insert into a. At this time, in the temporary holding clip A,
Each temporary fixing projection 3 comes into contact with the inner peripheral surface of the bolt insertion hole 5a and elastically deforms inwardly (in this case, the claw portion 3a has the opening 1
When it passes through the bolt insertion hole 5a, and then the tip of each temporary fixing projection 3 passes through the bolt insertion hole 5a, it is restored by elastic force and the bolt is inserted as shown in FIG. 1 (b). It projects further outward than the insertion hole 5a.

In this way, when the bolt 4a is inserted until the temporary fixing projection 3 completely passes through the bolt insertion hole 5a,
The worker stops holding the heat insulator 4 and moves to the upper side of the floor panel 5. At this time, the heat insulator 4 tries to drop due to its own weight, but as shown in the drawing, the temporary fixing projection piece 3 of the temporary holding clip A has the bolt insertion hole 5a.
The heat insulator 4 is held by the floor panel 5 without dropping because it engages with the floor panel 5 at the peripheral edge of the heat insulator 4.

Next, from the upper side of the floor panel 5, the bolt 4
The nut 6 is fastened to a. By this fastening, the temporary holding clip A is crushed between the nut 6 and the floor panel 5, but at this time, the tubular portion 1 has a thin bending guide groove 1a. 1 bulges outward in a generally V-shaped cross section and bends, and the temporary fixing projection 3 also folds so as to bulge the middle portion outward due to the bent shape. As a result, FIG.
As shown in (c), it is crushed into a substantially uniform thickness over the entire circumference in a state of being folded in half from the middle part.

The attachment of the heat insulator 4 is completed as described above. In this attached state, the flange portion 2 of the temporary holding clip A made of resin is pressure-contacted to the lower side of the floor panel 5 at the periphery of the bolt insertion hole 5a. Further, between the upper side of the floor panel 5 at this position and the nut 6, the tubular portion 1 of the temporary holding clip A and the temporary fixing projection 3 are crushed with a substantially uniform thickness, so that the bolt The insertion hole 5a is reliably sealed.

As described above, the mounting method of this embodiment provides the effects listed below.

Bolt 4 a of heat insulator 4
The temporary holding clip A is attached to the bottom of the floor panel 5, and the bolt 4a is inserted from the lower side of the floor panel 5 into the bolt insertion hole 5a. Since it can be held, the workability is greatly improved, and the mounting work can be performed by one person even at a position where the heat insulator 4 could not be mounted while being held in the related art.

When the nut 6 is fastened to the bolt 4a, the temporary holding clip A made of resin is crushed between the nut 6 and the floor panel 5 to be used as a sealing material, so that a separate sealing material needs to be provided. The cost can be reduced, and the work for mounting the sealing material can be reduced. In addition, the temporary holding clip A of the embodiment is configured as described above, so that the effect of enabling the attachment by the above-described attachment method can be obtained.
In addition, in this embodiment, since the bending guide groove 1a is formed in the tubular portion 1, when the nut 6 is fastened, it is easy to bend so as to fold, and cracks and cracks are less likely to occur when crushed. A high sealing property is obtained when applied to the above mounting method.

Further, in the embodiment, the flange portion 2 is formed at the base end portion of the tubular portion 1, and after the nut 6 is fastened, the flange portion 2 is located at the periphery of the heat insulator 4 and the bolt insertion hole 5a. It is pressed and sandwiched between and, and when the above-described mounting method is executed, the effect of further improving the sealing property can be obtained.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific structure is not limited to this embodiment, and even if there is a design change or the like within a range not departing from the gist of the present invention. Included in the present invention.

For example, although the heat insulator 4 is shown as an underfloor mounting component in the embodiment, it can be applied to other components such as a muffler and a fuel tank which are mounted under a floor panel.

In the embodiment, heat-resistant polypropylene is used as the material for forming the temporary holding clip A.
Other resins such as elastomer and nylon can be applied, and the point is that they have a predetermined elasticity.

Also, in the embodiment, as the temporary fixing protrusion,
The plate-shaped provisional fixing projection piece 3 that spreads outward as it goes downward from the tip of the tubular portion is shown. The point is that the outer diameter of the tubular portion 1 when pressed into the hole from the tip end side of the tubular portion 1 is shown. Can be elastically deformed in the direction of contracting, and any shape can be used as long as it can be locked from the base end side of the tubular portion 1 to the edge portion of the hole. Alternatively, the shape may be such that it bulges outward from the tubular portion.

Further, although the folding guide groove is shown as the folding guide portion in the embodiment, other means such as a notch may be used.

[0036]

As described above, according to the method of mounting the under-floor mounting component according to the third aspect of the present invention, the bolt of the under-floor mounting component is attached with a temporary holding clip, and the bolt is attached from the lower side of the floor panel. Since the underfloor mounting parts can be held under the floor panel without the operator having to hold them by hand simply by inserting the bolt insertion holes, workability is greatly improved, and while the conventional underfloor mounting parts are held. The effect is that you can perform the installation work by yourself even in the position where it could not be installed.In addition, when fastening the nut to the bolt, press the resin temporary holding clip between the nut and the floor panel. Since it is crushed and used as a sealing material, it is not necessary to separately provide a sealing material, which can reduce the cost and reduce the work of providing the sealing material. The effect is obtained that.

Further, the temporary holding clip according to the first and second aspects has a tubular portion formed of a resin that is elastically deformable into a tubular shape, and the tubular portion which is formed integrally with the tubular portion and extends outward from the outer periphery of the tubular portion. And a temporary fixing protrusion that is elastically deformable in a direction of reducing the outer diameter when the temporary fixing protrusion is press-fitted into the hole from the tip side of the cylindrical portion, and Since the base end side of the portion is formed in a shape to be locked to the edge portion of the hole, there is an effect that the above-described mounting method can be performed.

Further, in the temporary holding clip according to the second aspect, since the bending guide groove is formed in the cylindrical portion, when the above-described mounting method is executed, the nut is fastened when the nut is fastened and crushed. It is easy to bend like it folds with the floor panel, and it has the effect that cracks and cracks do not easily enter when squeezing and stable and high sealing performance is obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a mounting method of an embodiment.

FIG. 2 is a perspective view showing a temporary holding clip according to an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view of a temporary holding clip of the embodiment.

FIG. 4 is an explanatory view of a mounted state of the heat insulator mounted by the mounting method of the embodiment.

[Explanation of symbols]

 A Temporary holding clip 1 Cylindrical part 1a Bending guide groove (bending guide part) 3 Temporary fixing projection piece (temporary fixing projection) 4 Heat insulator 4a Bolt 5 Floor panel 5a Bolt insertion hole 6 Nut

Claims (3)

[Claims] 1. A cylindrical portion formed of an elastically deformable resin in a cylindrical shape, and a temporary fixing projection portion formed integrally with the cylindrical portion and protruding outward from an outer periphery of the cylindrical portion, The temporary fixing projection is elastically deformable in a direction of reducing the outer diameter when press-fitted into the hole from the distal end side of the tubular portion, and the edge of the hole is seen from the proximal end side of the tubular portion. A temporary holding clip, characterized in that it is formed in a shape to be locked to a portion. 2. The temporary holding clip according to claim 1, wherein a thin-walled bending guide portion is formed in a circumferential direction at an intermediate portion of the tubular portion. 3. A bolt that is erected on an underfloor mounting part that is mounted on the lower side of a floor panel of a vehicle is inserted into a bolt insertion hole formed in the floor panel and fastened with a nut from the upper side of the floor panel. A method of mounting an underfloor mounting part for mounting an underfloor mounting part to a floor panel, wherein first, the temporary holding clip cylinder according to claim 1 or 2 is formed with an inner diameter slightly smaller than an outer diameter of the bolt. Part is mounted on the outer circumference of the bolt with the base end of the tubular part facing the base end side of the bolt, and then the underfloor mounting part is arranged on the lower side of the floor panel to be mounted on the bolt and this. The temporary holding clip from the underfloor side to the bolt insertion hole formed in advance to have a size larger than the outer diameter of the cylindrical portion and smaller than the outer diameter of the temporary fixing projection. Shrink the outer diameter After elastically deforming in the direction of the bolts, the bolts are inserted through the bolt insertion holes, then locked to the upper side of the floor panel, and this locking temporarily fixes the underfloor mounting member to the floor panel. A method for mounting a vehicle underfloor mounting component using the temporary holding clip, wherein the tubular portion of the temporary holding clip is fastened to the bolt until it is crushed.