FI103736B - Pillars of laminate construction - Google Patents

Description

103736

LAMINATE BUILDING

The invention relates to a column made of fiberglass laminate, which is improved by a new reinforcing solution to improve impact resistance.

The lighting, electric and traffic sign poles placed in roadside collision sensitive areas are known for being made of fiberglass laminate. The pillars are either flat or tapered and hollow on the inside. When colliding with such a relatively light pillar, the vehicle breaks down and uncontrollably falls or even flies for some distance. The pillar, as well as any lighting fixtures or other objects on it, may cause damage to, for example, other road users. The fibers reinforced in the column are easily cut and broken, causing the entire laminate backbone to break.

Further, a column is known from EP publication 0434770 having metal wires in polymer mass on top of a ceramic tube. From DE 3242161, Metal wires in a plastic column are known. WO 97/21872 discloses a metal mesh in a column structure. No publication discloses metal wires or mesh in a laminated layer with other laminate ·, ·. between layers, whereby the structure according to the invention and its advantages would be advantageous.

• · · • «* ··· * A gently tilting column solution is not suitable for use on the roadside - ··· la due to uncontrolled column behavior; * ·· si when encountered. The solution according to the invention achieves a considerable improvement in this respect and the invention is characterized by what is stated in the claims; process.

The column according to the invention behaves more aggressively when it is hit. Collisions are mainly point-loading. At least the initial phase of the collision is point loading, since the buffer first collides with the column first. Metallilankalujit- ·. ·. : because of the roads, the column does not break even though it breaks in its laminate section. Through the use of strong and unbreakable metal wires 103736 the 2 point load is distributed over a larger area on the side of the column. Unlike fracture-sensitive glass and carbon fibers, metal wire reinforcements tend to remain intact, absorbing collision energy through deformation, and stopping or slowing the vehicle. The yarns are more or less flexible metal yarns with high tensile strength. As a result, they most often remain uninterrupted in the event of a collision and provide a favorable behavior of the column.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which

Figure 1 is a sectional view of a column according to the invention. Figure 2 is a sectional view of another column according to the invention.

Figure 3 is a sectional view of a laminate structure viewed in the direction of the column.

FIG. The metal wires 4 are threads or wires parallel to the post. Relatively stiff but still flexible yarns are more susceptible to collision energy. The diameter of the yarns can be of the same size as the diameter of the fibers or can be considerably larger up to 10 mm. The thickness of the layer 2 containing the yarns depends on the yarn size. Preferably, the yarns are positioned adjacent to one another in the same layer 2 according to the pattern · · · • •• 1 1. When the point load is applied to the side of the bar, the bar dots at the load and the laminate breaks, but the yarns remain intact and receive collision energy. Also, the column itself is well resistant to collision in this case. Due to the magnitude of the collision, it will either stay upright or crash, but usually will not break.

Figure 2 shows a solution similar to Figure 1, but the wires 5 are mesh-like in layer 2. Metal wires. : The mesh construction slightly reduces the risk of the wall tearing when sharp or pointy objects hit the column.

103736 3

Figure 3 shows a corrected cross-section of a laminate structure. The top layer is described by reference numeral 6. Below the top layer 6 is a composite layer 7 with steel wires and reinforcing fibers in the same layer in a regular shape. Below the layer 7 are the transverse reinforcements 11, below it the longitudinal reinforcements 8, further under the transverse reinforcements 11 and below them the steel wires 9 as longitudinal reinforcements. Further down, there is still a layer of transverse reinforcements 11 and the lowest reinforcement layer 10 in the longitudinal direction. In this example, the steel wires are in the layer 7 and in the layer consisting solely of the steel wires 9.

The structure has the advantage that the high-strength steel wires are present in at least two layers spaced apart, e.g. separated by other layers.

Mesh-laid Metal wires prevent columnar cracks. The mesh layer may be, for example, a layer 8 attached to the structure of Figure 3. The transverse wires of the metal may be wound substantially in the transverse direction or with a suitable ascending thread. Naturally, the columnar yarns can also be replaced by yarns that are more or less deviated from the absolute columnar orientation.

The metal wires are high-waisted hair yarns with a diameter between 0.2 and 2.0 mm, for example. The majority (60-100%) of the metal «· *" yarns are placed parallel to the pole. The yarns may be ···· la as shown in Fig. 2, only mesh-like, but better: "The embodiment is obtained by adding mesh-parallel yarns in addition to the mesh. can also be braids such as metal wires.

• M • · · • * ·

Approximately 15% of the wire cross-sectional area is placed in the transverse structure of the column, preferably between ·· - 10 - 25% in the case of the column in question. of the threads visible in the cross-section. When the yarns are flexible as the yarns are wound, their placement and. ·. : Adjust the amount accurately.

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Claims (7)

A laminate column consisting of a plurality of interconnected and superimposed laminate cylindrical layers containing reinforcing fibers, characterized in that at least one laminate layer (2), (7), (9), other laminated layers (1,3) ; (6.11); (11,11) further includes metal wires that are resistant to bending and tension and receive deformation energy upon impacting the column. Column according to Claim 1, characterized in that the metal wires (4), (9) are single and at least in the longitudinal direction of the column. Column according to claim 1, characterized in that the metal wires are braids, such as metal ropes. A column according to claim 1, characterized in that the yarns (5) are in the layer in different directions, such as being mounted in a net. 4, 103736 Column according to one of the preceding claims 1 to 4, characterized in that the cross-sectional area of the metal wires is at least 10% of the cross-sectional area of the column, preferably between 10 and 25%. A column according to any one of claims 1 to 5, characterized in that the wire is at least in two layers (7,9) parallel to the column at a distance from one another. • Column ♦ · «according to one of the preceding claims 1 to 6, characterized in that the yarns have a diameter in the range of · · · 0.2 to 2 mm. ! 5 -mv / ** PATENTKRAV 1 u ° ^ u