JPH07205835A - Processing body for installing foaming material and structure for installing foaming material in hollow structure - Google Patents

Abstract

PURPOSE:To provide a processing body which can be installed easily to the hollow of a hollow structure such as a vehicle pillar, and a secure installing structure of a foaming material. CONSTITUTION:A processing body for foaming material installing which has four elastic pieces 2 of rectangular parallelepipeds having round outer forms, at the up and down, and left and right symmetric positions of a central part 1, is placed at a specific position on an inner pillar part 12 positioning the four elastic pieces 2 at the up and down, and the left and right parts of the hollow 16. When the inner pillar part 12 and the outer pillar part 14 are fixed by a spot welding 17, the four elastic pieces 2 are squeezed to the pillar inner walls to generate an elastic deformation, and the processing body is pressure-connected elastically and fixed to the hollow 16. Furthermore, by providing antiskid members 3 made by forming plural grooves having a saw-tooth form cross section parallel, to the elastic pieces 2 at the parts contacting to the inner surfaces of the hollow 16, a slippage of the processing body is prevented, and the processing body can be installed more securely in the hollow 16. Since the foaming material is formed by the heating from the external side, and a forming substance is filled in the hollow 16, a soundproof effect and a damping effect are given to the pillars.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is arranged at a predetermined portion in a hollow structure such as a pillar for a vehicle and foamed at that portion,
TECHNICAL FIELD The present invention relates to a processing body for mounting a foamable material and a structure for mounting the foamable material for blocking the hollow portion and exhibiting effects such as soundproofing and damping.

[0002]

2. Description of the Related Art A conventional mounting structure for a foamable material of this type has a hollow portion 16 formed by an inner pillar portion 12 and an outer pillar portion 14 as shown in FIG. The foamable material 10 was inserted into the screw (screw bolt) 11 inserted from the outside via the washer 15, and the foamable material 10 was fixed by the screw 11 inserted from the outside of the inner pillar portion 12. . The fixed foamable material 10 is foamed by heating from the outside, and the
The inner hollow portion 16 is not filled, and the foam filling the hollow portion 16 imparts soundproofing and damping effect to the pillar. In addition, in FIG. 9, 13 is a bolt tightening portion for assembling and fixing the inner pillar portion 12 and the outer pillar portion 14.

[0003]

However, in the conventional mounting structure for the foamable material 10, since the inner pillar portion 12 is provided with the screw hole, and the screw 11 for fixing the foamable material 10 is inserted into the screw hole, Since the foamed resin leaks from the screw hole, it was necessary to remove it. Further, the formation of the screw hole is troublesome, and the work of attaching the screw 11 is troublesome. Furthermore, the screws 11 may come off due to the buoyancy of the paint during the dipping coating. Therefore, an object of the present invention is to provide a foamed material attachment processed body that is easily attached to a predetermined portion of a hollow portion of a hollow structure such as a vehicle pillar, and is surely attached, and the attachment processed body. To provide a mounting structure for the foamable material.

[0004]

[Means for Solving the Problems] In order to solve the above problems, the foamed material mounting work body according to claim 1 is arranged in a hollow portion of a hollow structure, foamed, and foamed to block the hollow portion. A mounting processed body for attaching a foamable material forming a body to the hollow portion, wherein the foamable material has a shape that can be fixed in the hollow portion by pressing by elastic deformation. To do. The foamed material attachment processed body according to claim 2 is the foamable material attachment processed body according to claim 1, wherein the foamed material attachment processed body has a non-slip portion at a portion in contact with the inner surface of the hollow portion. It is characterized by The foamable material mounting structure according to claim 3 is a foamable material mounting structure which is disposed in a hollow portion of a hollow structure and forms a foam that foams and blocks the hollow portion. Alternatively, the foamed material attachment processing body according to claim 2 is fixed in the hollow portion of the hollow structure by elastic compression by elastic deformation of the foamable material.

[0005]

According to the work piece for attaching the foamable material according to the first or second aspect, the foamable material can be elastically pressure-bonded to the hollow portion of the hollow structure by the pressing force due to the elastic deformation of the foamable material. Further, according to the foamed material mounting workpiece according to claim 2, the non-slip portion increases the friction coefficient at a portion where the foamable material mounting workpiece comes into contact with the inner surface of the hollow portion. The flexible material is prevented from slipping from a predetermined position in the hollow portion. According to the foaming material mounting structure of the third aspect, the foaming material mounting processing body is fixed in the hollow portion of the hollow structure by elastic pressure bonding.

[0006]

【Example】

First Embodiment A first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the work piece for attaching the foamable material of Example 1 has a total of four vertical and horizontal symmetrical projections on the left and right of the upper and lower surfaces in FIG. 1 of the central portion 1 having a substantially rectangular parallelepiped shape. The elastic piece 2 is provided, and a slip stopper 3 is formed on the outer surface of the tip of each of the four elastic pieces 2. The shape of the four elastic pieces 2 is a constant length which is continuously formed along the two parallel long sides of the upper and lower surfaces of the central portion 1 outside the upper and lower surfaces (upper and lower sides) and is rounded. It is a rectangular parallelepiped plate having a thickness, and its length in the longitudinal direction is substantially the same as the long sides of the upper and lower surfaces of the central portion 1, and the length in the short direction is for attaching the foamable material of this Example 1. In the case where the processed body is attached to the hollow portion 16 inside the vehicle pillar to form the foamable material attachment structure of the first example, each of the tip ends of the four elastic pieces 2 is the hollow portion 1.
It is designed to be located at each of the four corners. Further, the height (distance between the tip ends of both elastic pieces 2 on the upper and lower surfaces) of the foamed material mounting workpiece of Example 1 is determined by the vehicle pillar to which the foamable material mounting workpiece of Example 1 is to be mounted. −
When the vehicle pillar is assembled, as shown in FIG. 2, the inner pillar portion 12 and the outer pillar portion 14 are arranged between the inner pillar portion 12 and the outer pillar portion 14 by being designed to be a little higher than the height of the hollow portion 16 and having the elastic piece 2. The elastic piece 2 of the work piece for attachment can be elastically deformed by being pressed by the inner surface of the hollow portion 16. The entire length of the elastic piece 2 in the longitudinal direction is on the outer surface of the tips of the four elastic pieces 2, that is, at the portion where the processing object for attachment of the foamable material of Example 1 contacts the inner surface of the hollow portion 16. A plurality of grooves each having a cross section of a saw-tooth shape are formed substantially parallel to each other to form a non-slip portion 3.

FIG. 2 is a front step of assembling and fixing the inner pillar portion 12 and the outer pillar portion 14 in which the processing body for mounting the foamable material of Example 1 is placed in the hollow portion 16 inside the vehicle pillar. FIG. In order to obtain the mounting structure of the foamable material according to the first embodiment by mounting the processing body for mounting the foamable material according to the first embodiment into the hollow portion 16 inside the vehicle pillar, the inner pillar portion 12 and the outer pillar are provided. Before the portion 14 is assembled and fixed, the processing body for attaching the foamable material of the present Example 1 is placed at the arrangement position on the inner pillar portion 12. At this time, the elastic piece 2 is placed so as to contact the inner pillar portion 12 and the outer pillar portion 14, respectively, the lower surface and the upper surface in FIG. The outer pillar portion 14 is then combined with the inner pillar portion 12 so as to hold down the work piece for mounting the foamable material of Example 1. Then, the inner pillar portion 12 and the outer pillar portion 14 are fixed by spot welding 17 to assemble the pillar. FIG. 3 shows a state in which the processing body for mounting the foamable material of Example 1 is mounted in the hollow portion 16 inside the vehicle pillar, that is, the structure for mounting the foamable material of Example 1 in which foaming is performed before heating. The elastic material is unfoamed.

As shown in FIG. 3, the mounting work body of Example 1 has an inner pillar portion 12 and an outer pillar portion 14.
It is elastically pressure-bonded to the hollow portion 16 formed by and is fixed at the position where the pillar hollow portion 16 is arranged. That is, since the elastic piece 2 is formed to have a roundness outside the upper and lower parallel surfaces of the central portion 1, the inner pillar portion 12 and the outer pillar portion 12 are formed.
By combining the portions 14, these four elastic pieces 2 are pressed toward the upper and lower surfaces of the central portion 1, and the tips of the elastic pieces 2 are located at the four corners of the hollow portion 16. In this case, since the anti-slip portions 3 formed on the outer surface of the elastic piece 2 come into contact with the inner surfaces of the four corners of the hollow portion 16 (the inner walls of the inner pillar portion 12 and the outer pillar portion 14), the present example 1 It is prevented that the attachment processed body of (3) slips inside the hollow portion 16 and shifts from the position where it is arranged. Therefore, the mounting work body of the first example is more reliably mounted in the hollow portion 16 inside the vehicle pillar.

Second Embodiment A second embodiment of the present invention will be described with reference to FIGS. 4 and 5. As shown in FIG. 4, the foamed material attachment work body of Example 2 has rectangular parallelepiped plate-shaped contact portions 4 on the upper and lower portions of the elastically deforming shape portion 5 in a substantially parallel manner. .
This elastically deforming shape portion 5 is in the shape of a hexagonal column, and its two parallel upper and lower planes are formed continuously with the upper and lower contact portions 4 and 4 in FIG. In the central portion of the elastically deformable portion 5, a hollow portion 5A having a substantially rhombic cross section is formed so as to penetrate through the elastically deformable portion 5 along the entire length in the longitudinal direction. The height (the distance between the outer surfaces of the two contact portions 4) is designed to be slightly higher than the height of the hollow portion 16 of the vehicle pillar to which this mounting workpiece is to be mounted, so that The processed body for attaching the foamable material is pressed by the inner surface of the hollow portion 16,
It is elastically deformable. The upper and lower outer surfaces of the contact portions 4, 4 are in contact with the inner surface of the hollow portion 16 and are provided with a plurality of substantially parallel grooves over the entire length of the contact portions 4, 4 to provide a sawtooth-shaped cross section. It is used as an anti-slip part 3.

FIG. 5 shows an attachment structure of the foamable material of Example 2 in which the attachment processed body of Example 2 is attached in the hollow portion of the vehicle pillar, and the foamable material is in an unfoamed state before heating. A cross section is shown. In order to mount the mounting workpiece of Example 2 in the hollow portion 16 inside the vehicle pillar to obtain a mounting structure, before the inner pillar portion 12 and the outer pillar portion 14 are assembled and fixed, the inner pillar portion 12 is fixed. The attachment processing body of the present Example 2 is placed at the arrangement position on the portion 12. At this time, as shown in FIG. 5, the contact portions 4 and 4 are placed so as to contact the lower and upper surfaces of the inner pillar portion 12 and the outer pillar portion 14, respectively. Next, the outer pillar portion 14 is combined with the inner pillar portion 12 so as to press the work piece for attachment of the second embodiment. At this time, the elastically deformed shape portion 5 is pressed and deformed, and its height is reduced. Then, the inner pillar portion 12 and the outer pillar portion 14 are spot-welded 1
Fix with 7 and assemble the pillar. Then, the processing body for attaching the foamable material of Example 2 has the inner pillar portion 12
And the outer pillar portion 14 is elastically pressure-bonded to the hollow portion 16 and is fixed at the position where the pillar hollow portion 16 is arranged.
In this case, the non-slip portions 3 formed on the outer surfaces of the contact portions 4 and 4 come into contact with the inner surface of the hollow portion 16, so that the mounting processed body of Example 2 slides inside the hollow portion 16,
It is prevented from moving out of the arrangement position.

Third Embodiment A third embodiment of the present invention will be described with reference to FIGS. 6 and 7. As shown in FIG. 6, the foamed material attachment work body of Example 3 is composed of a columnar portion 6 having anti-slip portions 3 and 3 at side positions of upper and lower sides, and a central portion of the columnar portion 6 Is formed with a cylindrical cavity 6A penetrating over the entire length in the longitudinal direction, and the height of the cylindrical portion 6 (the distance between the slip preventing portions 3 and 3) is equal to that of the foamable material of this Example 3. By designing the working body for foaming material of Example 3 to be slightly higher than the height of the hollow portion 16 of the vehicle pillar to which the working body for mounting is mounted, the working body for mounting the foamable material of Example 3 is elastically deformed by being pressed by the inner surface of the hollow portion 16. It is possible. The anti-slip parts 3 and 3 have a saw-toothed cross section by a plurality of substantially parallel grooves extending over the entire length of the cylindrical part 6 in the longitudinal direction.

FIG. 7 shows a structure in which the mounting processed body of the third embodiment is mounted in the hollow portion of the vehicle pillar, and shows a cross section in which the foamable material has not been foamed before heating. Example 3
To obtain the attachment structure by attaching the attachment processed body of (1) into the hollow portion 16 inside the vehicle pillar, the attachment processed body of Example 3 is prepared before the inner pillar portion 12 and the outer pillar portion 14 are assembled. The mounting processed body of the present Example 3 is placed at the arrangement position on the inner pillar portion 12. At this time, the upper and lower side surfaces having the anti-slip portions 3 and 3 are placed so as to contact the lower surface and the upper surface of the inner pillar portion 12 and the outer pillar portion 14 in FIG. 7, respectively. Next, the outer pillar portion 14
Is combined with the inner pillar portion 12 so as to press the work piece for attachment of this Example 3. At this time, the foamed material mounting work body of Example 3 is pressed to deform the columnar portion 6 and reduce its height. Then, the inner pillar portion 12 and the outer pillar portion 14 are spot-welded 1
Fix with 7 and assemble the pillar. In this case, since the non-slip parts 3 and 3 come into contact with the periphery of the hollow part 16, the work piece for attaching the foamable material of Example 3 may slip inside the hollow part 16 and move away from its position. To be prevented.

In Examples 1 to 3, as the foamable material, the material having the composition disclosed in JP-A-2-276836 was used. That is, this composition is a copolymer of ethylene and methyl acrylate MI 0.7, MA 15% by weight 63.5
5, LDPE (melting point 1.5 ℃, density 0.919) 27.15, 4,4-
Di-tert butyl peroxy n-butyl valerate (Trigonox 29/40) 0.63, bis (tert-butyl peroxy isopropyl) benzene (Perkadox 14/40) 1.63, benzenesulfonyl hydrazide (cello) Cellogen OT 3.62, azodicarbonamide (Porofor ADC-K) 1.81, and diethylene glycol (DEG) 1.81 (all ratios by weight). The porpho component comprises zinc which activates foaming activity. This formulation was prepared by dry blending and extruding or by adding a peroxy or blowing agent to the extruder. Extrusion was carried out twice, once to obtain low shear mixing using a small die orifice, then a second extrusion was carried out to obtain the required shape, a specific shape of rombic Extrude into blocks to form the required shape of the expandable material. The foamable material foams at a temperature of 110 ° C to 190 ° C,
The present invention is characterized in that it can be cured and gives a closed cell foam, but the present invention is not limited to this foamable material, and foams that foam by heating can be widely used. This Example 1 in which the processing body for attaching the foamable material of Example 1, 2 or Example 3 is attached in the hollow portion inside the vehicle pillar,
The foaming material attachment structure of No. 2 or Example 3 is heated from the outside. The heating temperature is the temperature at which the foamable material foams,
In this example, the temperature is about 160 ° C. Upon heating, the foamable material foams, and the resulting foam fills the hollow portion of the pillar. This state is as shown in FIG. FIG. 8 shows a cross-section of a portion of the hollow portion of the vehicle pillar in which the mounting processed body of the first, second or third example is present. The foam of the hollow portion 16 hardens and adheres to the inner wall of the hollow portion. Examples 1 and 2
Alternatively, the processed workpiece for attachment of Example 3 may be installed at a plurality of locations in the hollow portion 16 of the pillar to fill the entire hollow portion 16 of the pillar, or the hollow portion 16 of the pillar may be partially filled. It may be filled, and in both cases the foam will block the hollow part 16 of the pillar. It should be noted that the blocked foam can provide soundproofing and vibrationproofing effects.

The attachment structure of the foamable material of the present example 1, the example 2 or the example 3 has a processing body for attaching the foamable material of the example 1, 2 or 3 at a predetermined position on the inner pillar portion 12. It is formed by elastically crimping the attachment processed body of the foamable material of Example 1, 2 or 3 into the hollow portion 16 of the hollow structure by the outer pillar portion 14 when placing and assembling the pillar. The foamable material 10 has a hollow portion 1 inside the pillar.
6 can be easily installed. Unlike the above-mentioned conventional case, since it is not necessary to provide a screw hole for mounting a screw in the inner pillar portion 12, the foamed resin does not leak from the screw hole and the screw does not come off.
Since the foamed material mounting workpiece of Example 1, 2 or 3 has a shape that can be elastically deformed by pressing by the inner surface of the hollow portion, the repulsive force acts toward the inner wall of the pillar to strongly Fixed. It should be noted that the means for assembling and fixing the mounting processed body in the hollow portion 16 of the vehicle pillar is not limited to the case of each embodiment, and the mounting processed body is inserted into the hollow portion 16 formed by assembling the pillars. It may be fixed. Further, in the attachment structure of the foamable material according to the present example 1, the example 2 or the example 3, the non-slip portion 3 of the processed body for attaching the foamable material according to the example 1, 2 or 3 is the hollow portion 1.
Since it is in contact with the periphery of 6, the work piece for attachment of the foamable material of the present example 1, the present example 2, or the present example 3 is prevented from slipping inside the hollow portion 16 and moving away from the arrangement position thereof. The mounting is made more reliable. And the attachment structure of the foamable material of the present example 1, the present example 2, or the present example 3 is
Since the foamable material is shaped to partially contact the inner wall of the pillar, when the pillar is heated from the outside and the foamable material is foamed, the heat from the outside promptly expands from the inner wall of the pillar. Has the advantage of being transmitted to. Since the foamed material mounting workpieces of Examples 2 and 3 each have a cavity 5A and a cavity 6A, the amount of the foamable material used is smaller than that of Example 1, thus reducing the cost. It has the advantage of being cheaper.

The shape of the work piece for attaching the foamable material of the present embodiment is an example, and in addition to these, there are various shapes of the foamable material that can be elastically deformed by pressing by the inner surface of the hollow portion of the hollow structure. Mounting work pieces can be used in the present invention. And the shape of the non-slip portion of each of the examples is also an example, and various shapes for increasing the friction coefficient between the foamable material and the hollow portion inner surface of the hollow structure are formed in the foamable material,
The non-slip portion or a material having a large friction coefficient may be attached to the foamable material as the non-slip portion. However, the non-slip part 3 of the work piece for attaching the foamable material of the present example 1, the example 2, or the example 3 can be easily formed, and the cost can be reduced as compared with the case of using another material. . Further, the foamable material used in each of the examples can be foamed and cured at a temperature (about 160 ° C.) during baking coating of an automobile to give a closed-cell foam, which is convenient without requiring a special heating step. . However, a separate heating step may be provided to foam and cure the foamable material, and the foamable material foams and cures and adheres to the surrounding metal to fill the hollow portion inside the pillar, so that the vehicle pillar is Has soundproofing and damping effect. In addition, in each of the embodiments, the case where the processing body for attaching the foamable material of the present invention is used in the hollow portion of the vehicle pillar and the attachment structure of the foamable material obtained in this case have been described. It is also possible to use the foamed material attachment processed body of the present invention in the hollow part of another hollow structure to provide a foamable material attachment structure and to impart effects such as soundproofing, waterproofing, and vibration damping to the hollow structure. .

[0016]

According to the work piece for attaching the foamable material of the first aspect, the foamable material can be arranged at a predetermined position in the hollow structure by elastically pressure-bonding in the hollow portion. According to the work piece for attaching the foamable material of the second aspect, slippage from the position where the foamable material is attached is further prevented.
According to the foamable material mounting structure of the third aspect, the foamable material placed by pressure bonding at a predetermined position in the hollow structure is prevented from sliding from the inner surface of the hollow portion. Therefore, it is not necessary to establish screw holes for screws around the hollow structure, and the problem that the foam leaks from the screw holes naturally does not occur. Also, the mounting work is easier than the conventional mounting by screws. The buoyancy of the paint during the dipping coating also prevents the foam material from being detached.

[Brief description of drawings]

FIG. 1 is a perspective view of a processing body for attaching a foamable material according to a first embodiment.

FIG. 2 is an explanatory diagram of a method of attaching a processed body for attaching a foamable material in Example 1.

FIG. 3 is a cross-sectional view showing an attachment structure of a foamable material of Example 1.

FIG. 4 is a perspective view of an attached processed body of a foamable material according to a second embodiment.

FIG. 5 is a cross-sectional view showing a mounting structure for a foamable material according to a second embodiment.

FIG. 6 is a perspective view of an attached processed body of a foamable material according to a third embodiment.

FIG. 7 is a cross-sectional view showing a mounting structure for a foamable material according to a third embodiment.

FIG. 8 is a state diagram of a foam filled with a hollow portion of a pillar in Example 1, 2 or 3.

FIG. 9 is a cross-sectional view showing an attached state of a conventional foamable material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Central part 2 Elastic piece 3 Slip prevention part 4 Contact part 5 Elastic deformation shape part 6 Cylindrical shape part 12 Inner pillar part 14 Outer pillar part 16 Hollow part

Claims (3)

[Claims] 1. A processing object for attachment, which is disposed in the hollow portion of a hollow structure, foams a foaming material that forms a foam that blocks the hollow portion, and which is attached to the hollow portion. A processed body for attaching a foamable material, characterized in that the material has a shape that can be fixed in the hollow portion by pressing by elastic deformation. 2. The processed product for attachment of a foamable material according to claim 1, wherein a non-slip portion is provided in a portion in contact with the inner surface of the hollow portion. 3. The foamable material mounting structure according to claim 1, wherein the foamable material is attached to the hollow portion of the hollow structure and foams to form a foam that blocks the hollow portion. The mounting structure for a foamable material is characterized in that the processing body for mounting is fixed in the hollow portion of the hollow structure by elastically crimping due to elastic deformation of the foamable material.