JP2013010272A - Footrest-integrated floor-raising material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally mold a footrest in a vehicular floor raising material, disposed in a floor pan of an automobile, and setting the height of the floor surface.SOLUTION: The footrest-integrated raising material 10, in which the footrest 16 is integrally formed by blow molding, a thin-walled part 22 attending upon the molding is provided with a reinforcing insert plate 24.

Description

  The present invention relates to a vehicle floor raising material that is arranged on a floor pan of an automobile and sets the height of a floor surface, and more particularly to a raising material formed by integrally forming a footrest portion.

Conventionally, as described in Patent Document 1, a flooring material is disposed on a floor pan, and a floor surface is formed by laying a carpet thereon, and the height of the floor surface is set to a desired height. At the same time, those that improve soundproofing and sound insulation are known.
Such a vehicle floor raising material is a substantially rectangular panel shape having a predetermined thickness (height) according to specifications, and is required to be lighter. Since it is installed at the foot and the driver's feet are placed on the upper surface, rigidity, especially compression rigidity is required, so a rib that extends between the upper wall and the back wall and connects both walls is provided. A resin-made integral hollow structure provided inside is employed.
In such a raising material, as described in Patent Document 2, it is common to manufacture the footrest part separately and attach it directly to the floor panel separately from the raising material. Such a vehicle floor raising material is generally manufactured by blow molding as exemplified in Patent Document 3 by the present applicant.

By the way, as described above, in the prior art in which the footrest portion is manufactured separately and attached to the vehicle body, there is an inconvenience that requires extra costs and labor for the manufacture and assembly of the footrest. Then, the present inventors tried to form the footrest part integrally with the raising material by blow molding. However, as a result, when the standing wall of the footrest is integrally formed by blow molding, the portion becomes thin due to the high blow ratio, resulting in insufficient strength as a footrest, and deformation in the long term It has been found that there is a case where it is damaged. Furthermore, as a result of thinning of the standing wall portion, parison breakage may occur in the molded product, which has been found to contribute to a decrease in yield.
JP 2005-153757 A JP 2000-16136 A Japanese Patent No. 4462924

  In view of the above technical problems, an object of the present invention is a footrest-integrated raising material in which a footrest is integrally formed by blow molding, and a reinforcing insert plate is provided in a thinned portion accompanying molding. It is providing the said raising material which becomes.

In order to achieve the above object, the footrest-integrated raising material of the present invention is
A vehicle floor raising material formed by blow molding to be set on the floor pan of an automobile to set the height of the floor surface,
The raising material has a hollow double wall structure composed of an upper wall and a back wall,
In the above-described raising material, a footrest part having a footrest surface on which a driver puts his / her foot is projected on a part of the upper surface wall,
A bent insert plate is integrally welded to the upper surface wall so as to straddle the footrest surface and the standing wall forming the side surface of the footrest surface.

  According to the footrest-integrated raising material of the present invention having the above-described configuration, when the raising material having the footrest is blow-molded, the joint portion between the footrest mounting surface and the standing wall tends to be thinned most. In order to reinforce, the bent insert plate is disposed so as to straddle both, so that the strength of the footrest-integrated raising material by blow molding can be increased to a practical level. In order to obtain such an effect, as a modification, a bent insert plate is provided on the upper surface wall so as to straddle the footrest surface and the surface opposite to the standing wall forming the side surface of the footrest surface. The insert plate is bent with respect to the top wall so as to straddle the footrest surface and the two standing walls that form both side surfaces of the footrest surface. It is also possible to adopt a configuration in which they are integrally welded.

  In order to achieve the above-mentioned object, the footrest-integrated raising material of the present invention is such that the insert plate is bent in advance into the shape at the time of completion, and the upper surface wall is formed in a split mold for blow molding. It is configured to be inserted and arranged inside the side and to be integrally welded by performing a blow molding process of the raising material.

  According to the footrest-integrated raising material of the present invention having the above-described configuration, when the raising material is blow-molded, the insert plate in a state of being bent into a completed shape in advance is used. The insert plate is in close contact with the inner surface, and the blow molding process of the raised material can be performed with a low blowing pressure.

  To achieve the above object, the footrest-integrated raising material of the present invention has a structure in which the insert plate is formed of the same material as the raising material.

  According to the footrest-integrated raising material of the present invention having the above-described configuration, with the blow molding of the raising material, the heat of the parison is transmitted to the insert plate, and a part of the surface of the insert plate is melted. Although they are welded, if the same material is used, the affinity is high, and a sufficient welding strength can be obtained at the welded portion.

  In order to achieve the above object, the footrest-integrated raising material of the present invention is configured such that the surface welded to the raising material in the insert plate is rough or has an uneven portion. .

  According to the footrest-integrated type raising material of the present invention having the above-described configuration, the welding surface of the insert plate is formed so as to have a larger surface area than the flat surface, so that the bonding strength with the raising material is increased. Is possible.

In order to achieve the above object, a method for producing a footrest-integrated raising material according to the present invention comprises:
A step of inserting and arranging the insert plate inside the upper surface wall molding side in the split mold for blow molding of the floor raising material;
A step of dripping a cylindrical molten parison between the split molds;
Clamping the split mold to form a sealed space in the mold; and
Blowing pressure is applied into the sealed space, the molten parison is pressed toward the cavity and shaped, and the surface of the insert plate is partially melted by the molten parison, and the molten parison and the insert plate are welded together. Integrating them,
Opening the split mold, taking out the molded product, and deburring the molded product;
It has a configuration.

  Taking a one-box automobile as an example, a footrest-integrated raising material according to the present invention will be described in detail below with reference to the drawings.

  FIG. 1 is a perspective view showing a molded product of a footrest-integrated raising material according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a cross section AA of FIG.

In the figure, a raising member 10 is placed on a floor pan (not shown) forming a driver's seat of an automobile to set the height of the floor surface, preferably ABS resin, modified polyphenylene. It consists of thermoplastic resin such as oxide resin, polycarbonate resin, polyamide resin, polystyrene resin, polyethylene resin, polypropylene resin, etc., and the upper surface wall 12 as the floor surface and the back surface as the support surface by blow molding or vacuum forming of the cylindrical parison And a wall 14 to form a hollow double wall structure. A peripheral side wall 13 is provided between the top wall 12 and the back wall 14 so as to connect them. In addition, recessed groove-shaped reinforcing ribs 12 a are formed on the upper surface wall 12 over the entire upper surface wall 12 with appropriate intervals. Although not visible from the drawings, reinforcing ribs (not shown) similar to the reinforcing ribs 12a of the upper surface wall 12 are also formed on the back wall 14.
The size of the raising material 10, that is, the size of the upper surface wall 12 or the rear surface wall 14 is appropriately determined according to the place where the raising material 10 is installed, and each of the upper surface wall 12, the rear surface wall 14 and the peripheral side wall 16. The thickness is determined by the relationship between the weight reduction of the raising material 10 and the required rigidity, particularly the compression rigidity, and the molding material is melted in consideration of the blow pressure, blow ratio, etc. in blow molding described later. By determining the thickness of the cylindrical parison in the state, the thickness of the raising material 10 that is the final molded product is determined.

  In the raising material 10 having such a hollow double wall structure, a footrest 16 is integrally formed with the upper surface wall 12 by forming the upper surface wall 12 deeply in a portion where the left foot of the driver is located. The footrest 16 protrudes as an inclined footrest surface 18 that protrudes from the upper surface wall 12 toward the front of the vehicle.

  Next, referring to FIG. 2, the joint portion 22 between the footrest surface 18 of the footrest 16 and the standing wall 20 which is the right side surface of the footrest surface 18 is caused by a sudden rise shape during blow molding. In other words, the thickness of the melted parison tends to be the smallest. This is due to the increase in the blow ratio of the portion. Therefore, in the present embodiment, the insert plate 24 bent along the coupling portion 22 is integrally welded to the raising material 10 so as to straddle the footrest surface 18 and the standing wall 20. . For the insert plate 24, the same type of resin as used for molding the raising material 10 is used among the various resins described above. Further, in the insert plate 24, the surface to be welded to the footrest surface 18 and the standing wall 20 is a rough surface, which increases the contact surface area of the welded portion and / or has an uneven portion. Thus, the raised material 10 is engaged with the raised material 10, thereby increasing the bonding strength of the welded portion 26.

  Referring again to FIG. 1, a duct 28 that is an air flow path of an air conditioner is formed integrally with the raising member 10 on the raising member 10, and a concave groove-shaped reinforcing rib 30 is formed on the upper surface of the duct portion 28. It is formed along the direction of air flowing in the duct. Further, on both sides of the duct portion 28, a long groove 28a is formed as a partition so that the upper wall 12 and the rear wall 14 are welded to make the duct portion 28 hermetically independent. The air from the air conditioner is introduced from the air inlet 32, guided to the air outlet 34, and distributed to a rear seat (not shown). Note that 36 is a burr, 38 is a cutting position, and 40 is a flow dividing wall.

Next, referring to FIG. 3, in the production of the footrest-integrated bulk raising material configured as described above, the inside of the mold 102 on the upper surface wall molding side in the split mold 100 for blow molding of the bulking material 10. In addition, an insert plate (not shown) is inserted and arranged, a cylindrical molten parison 106 is suspended between the divided molds 100, the divided molds 102 and 104 are clamped, and sealed in the mold 100. A space 108 is formed, pressure is blown from the blow pins 110 and 112 into the sealed space 108, the molten parison 106 is pressed toward the cavity 108, and the surface of the insert plate is partially formed by the molten parison 106. The molten parison 106 and the insert plate are integrated with each other by welding, the molds 102 and 104 are opened, and the molded product is removed. And, to the deburring of the molded article.
The insertion arrangement of the insert plate (not shown) is preferably before the cylindrical molten parison 106 is suspended. However, if the mold 102 is sufficiently opened, the cylindrical molten parison 106 is suspended. Later, if necessary, an insert plate (not shown) may be inserted and arranged.
Incidentally, 114 is a hollow main body part, 116 is a groove-like rib, 118 is a cylindrical rib, 120 is a ventilation part (duct), 122 is a burr, and 124 is a head.
According to the footrest-integrated lifting material 10 of the present invention having the above-described configuration, when the lifting material 10 having the footrest 16 is blow-molded, the footrest 16 tends to be thinned most due to an increase in the blow ratio. In order to reinforce the joint portion 22 between the footrest surface 18 and the standing wall 20, the bent insert plate 24 is disposed so as to straddle both, so that the strength of the footrest-integrated raising material by blow molding is practical. It becomes possible to raise to a certain extent.

  Although the embodiments of the present invention have been described in detail above, various modifications or changes can be made by those skilled in the art without departing from the scope of the present invention. For example, in the above-described embodiment, the insert plate 24 bent along the coupling portion 22 is integrally welded 26 to the raising material 10 so as to straddle the footrest surface 18 and the standing wall 20. However, the insert plate 24 may be disposed on the opposite side surface, or may be disposed on both side surfaces so as to straddle the footrest surface 18.

It is the perspective view which showed the molded article of the footrest integrated type raising material by embodiment of this invention. It is sectional drawing which showed the AA cross section of FIG. It is sectional drawing which showed an example of the metal mold | die used for manufacture of the raising material of a footrest integrated type of FIG.

10 Raising material 12 Top wall (floor surface)
12a Reinforcement rib 13 Peripheral side wall 14 Back wall 16 Footrest 18 Footrest surface 20 Standing wall 22 Connection part 24 Insert plate 26 Welding part 28 Duct 30 Reinforcement rib 32 Air inlet 34 Air outlet 36 Burr 38 Cutting position 40 Dividing wall 100 Dividing mold DESCRIPTION OF SYMBOLS 102 Upper surface side metal mold | die 104 Back surface wall side metal mold | die 106 Molten parison 108 Sealed space 110 Blow pin 112 Blow pin 114 Hollow main-body part 116 Groove-shaped rib 118 Cylindrical rib 120 Ventilation part (duct)
122 Bali 124 Head

Claims (8)

A vehicle floor raising material formed by blow molding to be set on the floor pan of an automobile to set the height of the floor surface,
The raising material has a hollow double wall structure composed of an upper wall and a back wall,
In the above-described raising material, a footrest part having a footrest surface on which a driver puts his / her foot is projected on a part of the upper surface wall,
A footrest-integrated raising material in which a bent insert plate is integrally welded to an upper surface wall so as to straddle the footrest surface and a standing wall forming a side surface of the footrest surface. A vehicle floor raising material formed by blow molding to be set on the floor pan of an automobile to set the height of the floor surface,
The raising material has a hollow double wall structure composed of an upper wall and a back wall,
In the above-described raising material, a footrest part having a footrest surface on which a driver puts his / her foot is projected on a part of the upper surface wall,
A raised footrest-integrated type in which a bent insert plate is integrally welded to the upper surface wall so as to straddle the footrest surface and the surface opposite to the standing wall that forms the side surface of the footrest surface. Wood. A vehicle floor raising material formed by blow molding to be set on the floor pan of an automobile to set the height of the floor surface,
The raising material has a hollow double wall structure composed of an upper wall and a back wall,
In the above-described raising material, a footrest part having a footrest surface on which a driver puts his / her foot is projected on a part of the upper surface wall,
A footrest-integrated raising material in which a bent insert plate is integrally welded to the upper surface wall so as to straddle the footrest surface and two standing walls that form both sides of the footrest surface. .   The insert plate is inserted and arranged inside the upper surface wall molding side in the split mold for blow molding in a state of being bent and molded into the shape at the completion, and performing the blow molding process of the raising material, The footrest-integrated raising material according to any one of claims 1 to 3, wherein both are integrally welded.   The said insert board is a footrest integral type raising material as described in any one of Claims 1 thru | or 4 currently formed from resin of the same material as the raising material.   The footrest-integrated type raising material according to any one of claims 1 to 5, wherein a surface welded to the raising material in the insert plate is a rough surface.   The footrest-integrated raising material according to any one of claims 1 to 6, wherein a surface welded to the raising material in the insert plate has an uneven portion. A method for producing the footrest-integrated raising material,
A step of inserting and arranging the insert plate inside the upper surface wall molding side in the split mold for blow molding of the floor raising material;
A step of dripping a cylindrical molten parison between the split molds;
Clamping the split mold to form a sealed space in the mold; and
Blowing pressure is applied into the sealed space, the molten parison is pressed toward the cavity and shaped, and the surface of the insert plate is partially melted by the molten parison, and the molten parison and the insert plate are welded together. Integrating them,
Opening the split mold, taking out the molded product, and deburring the molded product;
The manufacturing method of the footrest integral type raising material of Claim 1 thru | or 8 provided with these.

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