JP4594781B2 - Blow molded product reinforcing member fixing structure - Google Patents

Description

  The present invention relates to a blown reinforcement reinforcing board having a plastic hollow double wall structure such as an automobile floor lid, and to a fixing structure of a reinforcing member inserted to reinforce a blow molded product body.

  A conventional automobile floor lid is provided with a recessed portion protruding from the back surface of the molded product body to the inside of the cavity as a fixed structure, and further provided with small protrusions projecting inside the cavity with each recessed portion as a base, A system in which the small protrusions are fixed in contact with the pipe member to be inserted, and a semicircular arc-shaped protrusion is swelled from the back surface of the lid main body to the inside of the cavity, and is fixed in contact with the pipe member to be inserted. A method such as a method has been proposed.

  For example, in Japanese Patent No. 3472460 (TS Tech Co., Ltd.), as shown in FIG. 6, the concave portion 5a is provided with a small protrusion 5b. However, the boundary between the concave portion 5a and the small protrusion 5b is provided. There was a problem in that an acute angle step was formed, and when the reinforcing steel square pipe P was inserted, the tip corner collided with the small protrusion 5b, and the small protrusion 5b was cut from the root by the impact.

  On the other hand, since the small protrusion 5b is further projected in a dot-like manner with the recessed portion 5a as a base, the adjustment width of the gap in the cavity is narrow, and the wall surface of the molded product body does not contact the molding die, so that it has a uniform thickness. In other words, there is a problem that it does not fit in the preset dimensions.

Furthermore, in order to form the small protrusion 5b by blow molding, it is necessary to provide a small protrusion protruding in a dot shape on the tip end surface of the protruding mold cavity for forming the recessed portion 5a, and adjusting the gap of the insertion cavity However, there was a problem that it was difficult and very expensive.
Japanese Patent No. 3472460

  The present invention solves the above-described problems, and provides a triangular plate-shaped recess (projection) having an inclined wall surface on the reinforcing member insertion side as a position restricting portion in the vertical direction, and cutting the tip portion. An object of the present invention is to form a blow molded article reinforcing member fixing structure having a structure capable of easily adjusting the gap of the insertion cavity by blow molding using a simple mold.

The reinforcing member fixing structure of the blow molded product according to the present invention includes a plurality of recesses having a plurality of rigidity at predetermined intervals in the longitudinal direction of the insertion cavity on the back wall of the plastic hollow double wall structure. And provided so as to project from the back surface of the molded article body to the inside of the insertion cavity, and the cross-section of the recess is a triangular plate having an inclination angle (11) with respect to the insertion direction of the reinforcing member of 45 degrees or less , and Provided in the shape of a protrusion having an elongated width in the reinforcing member insertion direction, the triangular plate-like apex portion of each recess is brought into contact with the inserted reinforcing member, and the reinforcing member is inserted into the insertion cavity. It is characterized in that it can be pushed and fixed.

The triangular-shaped inclination angle (11) of each recess is set to 45 degrees or less, the width of the vertical direction against the insertion direction is characterized by being set smaller than the dimension of the cross section of the reinforcing member to be inserted.
In addition, a side regulating inner rib, which is a rib for regulating the lateral displacement of the reinforcing member, is provided.

By employing such a simple structure, the recess triangular shaped tip can be easily machined to the gap adjustment of the insertion cavity also becomes possible to perform easily, each recess the triangular shaped apex portion of the can be closely contact the reinforcing member can be firmly fixed push the reinforcing member inside insertion cavity.

  Since the present invention is configured as described above, the following effects can be realized.

A floor lid for an automobile integrally molded as a hollow double structure by blow molding, provided with a triangular plate-shaped recess (projection) having an inclined wall surface on the reinforcing member insertion side as a vertical position regulating portion, and a tip Blow molded product reinforcement member fixing structure that has a structure that can easily adjust the gap of the insertion cavity by cutting the part, using a simpler mold than before, low yield with good yield Can be manufactured.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall perspective view of a blow molded product of a plastic hollow double wall structure of the present invention, which is integrally formed by blow molding. It consists of front and back walls facing each other at an interval, and a peripheral wall that closes this peripheral edge, and a reinforcing material insertion cavity is provided at the center in the longitudinal direction of the cavity, and in the longitudinal direction of this insertion cavity A plurality of recesses having a plurality of rigidity are formed at predetermined intervals so as to protrude from the back surface of the molded product body to the inside of the insertion cavity. Thus, the inserted reinforcing member having a cross-sectional shape relatively smaller than the internal space is fixed. As the reinforcing member, a cylindrical pipe member, a square member or the like can be used.

  2 and 3 show the cross-sectional shape of the recessed portion, which is a triangular plate having an inclined portion on the insertion side of the reinforcing member, and has an elongated shape in the reinforcing member insertion direction. It is provided in a protruding shape, and is formed so that the triangular plate-like apex of each of the recessed portions is brought into contact with the inserted reinforcing member so that the reinforcing member can be pushed and fixed inside the insertion cavity.

  FIG. 3 shows a state in which a reinforcing member is inserted into the insertion cavity from the opening of the hollow double wall structure and is in contact with the protrusion. The inclination angle of the protrusions is formed to be 45 degrees or less, so that the reinforcing member can be pressed down with an appropriate rigidity and can be firmly fixed without play.

  FIG. 4 is a longitudinal sectional view (longitudinal direction) showing an example in which a square member is fixed to the reinforcing member. The width dimension of the elongated shape with respect to the insertion direction of the recess is formed smaller than the width dimension of the square member.

  FIG. 5 is a longitudinal sectional view (longitudinal direction) showing an example in which a cylindrical pipe member is fixed to a reinforcing member. The width of the elongated shape with respect to the insertion direction of the recess is formed smaller than the diameter of the pipe member. In the example of the pipe member, side surface regulating ribs (inner ribs) for regulating lateral displacement are further provided.

The whole perspective view of the blow molded product of a plastic hollow double wall structure is shown. The cross-sectional view of the recessed part in FIG. 1 is shown. In FIG. 2, it is the cross-sectional view of the recessed part which shows the state which the inserted reinforcing material contact | abutted to the projection part. It is a longitudinal cross-sectional view (longitudinal direction) which shows the example fixed using the square member for the reinforcement member. It is a longitudinal cross-sectional view (longitudinal direction) which shows the example fixed using the cylindrical pipe member for the reinforcement member. A conventional example is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic hollow double wall structure 2 Front wall of hollow double wall structure 3 Back wall of hollow double wall structure 4 Surrounding wall of hollow double wall structure 5 Skin material 6 Recessed part 7 Reinforcement member 8 Opening Part (reinforcing member insertion port)
9 Protrusion 10 Side regulating rib (inner rib)
11 Inclination angle of protrusion

Claims (2)

Front and back walls facing each other at an interval;
A peripheral wall for closing the periphery of the front wall and the back wall ;
In order to reinforce the main body of the plastic hollow double-wall structure made of plastic, the inner space of the hollow part for inserting the reinforcing member formed at the center of the hollow double-wall structure also a reinforcing member having a relatively small cross-sectional shape, the reinforcing member fixing structure of the blow molded article you inserted and fixed inside of the insertion-class cavity,
While providing a plurality of rigid recesses with a predetermined interval in the longitudinal direction of the insertion cavity, projecting from the back of the molded product body to the inside of the insertion cavity,
The concave section has a triangular plate shape whose inclination angle (11) with respect to the insertion direction of the reinforcing member is 45 degrees or less , and is provided in a protruding shape having an elongated width in the reinforcing member insertion direction,
A reinforcing member fixing structure for a blow molded article, wherein the triangular plate-like apex portion of each concave portion is brought into contact with a reinforcing member to be inserted, and the reinforcing member is pushed and fixed inside the insertion cavity. The triangular-shaped in the insertion direction in pairs to the vertical width of each recess is minor than the size of the cross section of the reinforcing member to be inserted, and the side regulating inner rib is a rib for regulating the displacement in the transverse direction The blow-molded product reinforcing member fixing structure according to claim 1, wherein the blow-molded product reinforcing member fixing structure is provided.

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