An impact-absorbing structure includes: a bumper face; a bumper beam; and an impact-absorbing member interposed to be compressively deformed between the exterior member and the movable-body-side rigid member. The movable-body-side rigid member, in an up-and-down direction of the movable-body-side rigid member, includes: a plurality of recesses recessed toward the movable body; and a protrusion protruding forward the movable body to be formed between the plurality of recesses. The plurality of recesses each have a vertical width gradually tapering toward the movable body, and the impact-absorbing member is fitted into at least two of the plurality of recesses.

An impact-absorbing structure includes: a bumper face; a bumper beam; and an impact-absorbing member interposed to be compressively deformed between the exterior member and the movable-body-side rigid member. The movable-body-side rigid member, in an up-and-down direction of the movable-body-side rigid member, includes: a plurality of recesses recessed toward the movable body; and a protrusion protruding forward the movable body to be formed between the plurality of recesses. The plurality of recesses each have a vertical width gradually tapering toward the movable body, and the impact-absorbing member is fitted into at least two of the plurality of recesses.

A method for joining members according to an embodiment of the present invention includes: providing a bumper stay including two integrated pipe portions extending in an identical direction, the bumper stay including a recess provided between the pipe portions being adjacent to each other, the recess extending in a longitudinal direction of the pipe portions from end surfaces of the pipe portions, a part of the recess serving as a locking portion, and a bumper beam including a rear inclined wall formed with two hole portions into which the pipe portions of the bumper stay are insertable respectively; inserting the bumper stay into the hole portions of the bumper beam until the locking portion abuts on the rear inclined wall; and pipe-expanding an insertion portion of the bumper stay into the bumper beam to join the insertion portion to the bumper beam by press-fitting.

A kart includes a frame, front and rear wheels rotatable about front and rear axle axes, and an impact protection structure surrounding the frame. The impact protection structure includes: at least one front protective element, at least one rear protective element, and at least one lateral protective element on each lateral side of the kart. Each of the at least one lateral protective element is mounted to a pivot bearing fixed to the frame so as to be pivotally adjustable about a frame vertical axis, and is disposed closer to the rear axle axis than to the front axle axis. Each of the pivot bearings includes a bearing block and a bearing pedestal pivotable relative to the bearing block. Each of the at least one lateral protective element engages the bearing pedestal of a corresponding pivot bearing. Shock-absorbing dampers are disposed between the frame and the protective elements.

A kart includes a frame, front and rear wheels rotatable about front and rear axle axes, and an impact protection structure surrounding the frame. The impact protection structure includes: at least one front protective element, at least one rear protective element, and at least one lateral protective element on each lateral side of the kart. Each of the at least one lateral protective element is mounted to a pivot bearing fixed to the frame so as to be pivotally adjustable about a frame vertical axis, and is disposed closer to the rear axle axis than to the front axle axis. Each of the pivot bearings includes a bearing block and a bearing pedestal pivotable relative to the bearing block. Each of the at least one lateral protective element engages the bearing pedestal of a corresponding pivot bearing. Shock-absorbing dampers are disposed between the frame and the protective elements.

A sensor protector includes two stays and a thin-plate shaped separate sheet held by the stays. The stays are provided on a bracket. The bracket holds a sensor and is fixed at a predetermined position to an outside panel of the body of a vehicle covered with a bumper cover of the vehicle. The sheet extends such that, in the sensor attached state, the sheet divides/partitions a space around the sensor formed between the outside panel of the body and the bumper cover into an upper space which contains the entirety of the detection surface of the sensor and a lower space which does not contain the detection surface of the sensor.

A sensor protector includes two stays and a thin-plate shaped separate sheet held by the stays. The stays are provided on a bracket. The bracket holds a sensor and is fixed at a predetermined position to an outside panel of the body of a vehicle covered with a bumper cover of the vehicle. The sheet extends such that, in the sensor attached state, the sheet divides/partitions a space around the sensor formed between the outside panel of the body and the bumper cover into an upper space which contains the entirety of the detection surface of the sensor and a lower space which does not contain the detection surface of the sensor.

An impact absorbing structure for a vehicle according to the present invention includes: a resin frame member extending in a vehicle front-rear direction and having an opening portion in a surface thereof on one side in a vehicle width direction; and a strut member disposed in the opening portion of the frame member. The frame member includes a frame body having the opening portion, and a rib protruding at least either upward or downward from the frame body and extending in the vehicle front-rear direction. The strut member is disposed between a pair of opening edges for defining an upper edge and a lower edge of the opening portion and at a position abuttable against the paired opening edges, when the frame member is deformed by input of a load at a time of oblique collision from upward or oblique collision from downward.

An impact absorbing structure for a vehicle according to the present invention includes: a resin frame member extending in a vehicle front-rear direction and having an opening portion in a surface thereof on one side in a vehicle width direction; and a strut member disposed in the opening portion of the frame member. The frame member includes a frame body having the opening portion, and a rib protruding at least either upward or downward from the frame body and extending in the vehicle front-rear direction. The strut member is disposed between a pair of opening edges for defining an upper edge and a lower edge of the opening portion and at a position abuttable against the paired opening edges, when the frame member is deformed by input of a load at a time of oblique collision from upward or oblique collision from downward.

Provided is a rear guard structure system including: a chassis frame attached to the bottom of a vehicle; a plurality of guard stays having one ends hinge-coupled to chassis-frame hinges at both sides of the chassis frame through first hinges; and a rear guard attached to the other ends of the guard stays. A first stopper is mounted around the first hinge so as to restrict rotation of the guard stay, and includes a first buffer member to reduce shock or vibration when the rear guard is vertically vibrated.