Conventionally, vehicle suspension apparatuses include, for example, a vehicle suspension apparatus described in Patent document No. 1. A vehicle suspension apparatus includes mainly a shock absorber, a coil spring, and a dust cover. The coil spring mainly supports the weight of a vehicle so as to absorb impacts. The shock absorber attenuates the vibration of the coil spring. The dust cover covers the periphery of a piston rod that extends and retracts from a cylinder outer tube of the shock absorber so as to prevent the attachment of foreign objects and dust to a sliding unit. An upper area of the dust cover is fixed to an upper support side, and a lower area thereof is fixed to the cylinder outer tube, substantially covering the piston rod. Thus, an effect of preventing intrusion of foreign objects or dust is high compared to a type of dust cover whose lower area is open.
In the assembly of such a suspension apparatus to a vehicle, a shock absorber is first connected to the lower-arm side, and a coil spring is set via a lower insulator on a lower spring seat formed around the cylinder outer tube of the shock absorber. Then, for example, a dust cover that is integrated with an upper support is inserted between the coil spring and a piston rod from above the piston rod, and the upper support and the upper end side of the piston rod are connected. After that, while lowering a lower area of the dust cover to a predetermined position of the cylinder outer tube by compressing the coil spring, the lower area of the dust cover is fit to a bracket that is formed along the circumference of the cylinder outer tube by sticking a hand in through a gap between wires of the coil spring.    [Patent document No. 1] Japanese Utility Model Application Publication No. S62-202548