Work vehicle

1. A work vehicle comprising:

a vehicle body having a vehicle body frame;

a load carrier deck provided at a rear portion of the vehicle body, the load carrier deck being vertically pivotable between an elevated discharging posture and a lowered load carrying posture;

an engine section provided under the load carrier deck, the engine section including an engine and an exhaust muffler for the engine;

a muffler heat insulating cover that covers at least a portion of an outer circumference of the exhaust muffler; and

an elastic anti-vibration member provided in a region of the muffler heat insulating cover adjacent the vehicle body frame, the muffler heat insulting cover being supported by the vehicle body frame via the elastic anti-vibration member,

wherein the elastic anti-vibration member is connectable to the vehicle body frame by a connecting bolt and a fastening restriction member configured for restricting a fastening stroke of the connecting bolt,

wherein the connecting bolt is disposed through an attachment hole in the elastic anti-vibration member to fasten the elastic anti-vibration member to a support portion of the vehicle body frame, and

wherein the fastening restriction member is disposed through the attachment hole and clamped by and between the support portion and a head of the connecting bolt while being fitted around the connecting bolt.

2. The work vehicle as defined in claim 1 , wherein:

the vehicle body frame includes a pair of right and left front/rear oriented vehicle body frames extending in a front/rear direction of the vehicle body;

the exhaust muffler is provided on more of a vehicle body inner side than the front/rear oriented vehicle body frames; and

the muffler heat insulating cover includes:

an upper cover portion that covers the exhaust muffler from above, and

a lateral cover portion that covers the exhaust muffler from the side opposite the front/rear oriented vehicle body frames relative to the exhaust muffler.

3. The work vehicle as defined in claim 1 , wherein:

the vehicle body frame includes a pair of right and left front/rear oriented vehicle body frames extending in a front/rear direction of the vehicle body, and a laterally oriented vehicle body frame that interconnects the pair of right and left front/rear oriented vehicle body frames;

one end side of the muffler heat insulating cover is supported by one of the front/rear oriented vehicle body frames associated therewith; and

the other end side of the muffler heat insulating cover is supported by the laterally oriented vehicle body frame via the elastic anti-vibration member.

4. The work vehicle as defined in claim 1 , wherein:

an arm member extends from the muffler heat insulating cover to the vehicle body frame; and

as the elastic anti-vibration member is engaged with the arm member, the arm member and the elastic anti-vibration member are fastened and connected to the vehicle body frame together.

5. The work vehicle as defined in claim 1 , further comprising:

a connection pipe that interconnecting an exhaust section of the engine and the muffler; and

a connection pipe heat insulating cover disposed aside the muffler heat insulating member for covering an outer circumference of the connection pipe.

6. A work vehicle comprising:

a vehicle body having a vehicle body frame;

a load carrier deck provided at a rear portion of the vehicle body, the load carrier deck being vertically pivotable between an elevated discharging posture and a lowered load carrying posture;

an engine section provided under the load carrier deck, the engine section including an engine and an exhaust muffler for the engine;

a muffler heat insulating cover that covers at least a portion of an outer circumference of the exhaust muffler, a portion of the muffler heat insulating cover extending from a height of an upper end of the exhaust muffler or higher to a height of a lower end portion of the exhaust muffler, and covering a lateral side of the exhaust muffler; and

an elastic anti-vibration member provided in a region of the muffler heat insulating cover adjacent the vehicle body frame, the muffler heat insulting cover being supported by the vehicle body frame via the elastic anti-vibration member,

wherein the elastic anti-vibration member is connectable to the vehicle body frame by a connecting bolt and a fastening restriction member configured for restricting a fastening stroke of the connecting bolt,

wherein the connecting bolt is disposed through an attachment hole in the elastic anti-vibration member to fasten the elastic anti-vibration member to a support portion of the vehicle body frame, and

wherein the fastening restriction member is disposed through the attachment hole and clamped by and between the support portion and a head of the connecting bolt while being fitted around the connecting bolt.

7. The work vehicle as defined in claim 6 , wherein:

the vehicle body frame includes a pair of right and left front/rear oriented vehicle body frames extending in a front/rear direction of the vehicle body;

the exhaust muffler is provided on more of a vehicle body inner side than the front/rear oriented vehicle body frames; and

the muffler heat insulating cover includes:

an upper cover portion that covers the exhaust muffler from above, and

a lateral cover portion that covers the exhaust muffler from the side opposite the front/rear oriented vehicle body frames relative to the exhaust muffler.

8. The work vehicle as defined in claim 6 , wherein:

the vehicle body frame includes a pair of right and left front/rear oriented vehicle body frames extending in a front/rear direction of the vehicle body, and a laterally oriented vehicle body frame that interconnects the pair of right and left front/rear oriented vehicle body frames;

one end side of the muffler heat insulating cover is supported by one of the front/rear oriented vehicle body frames associated therewith; and

the other end side of the muffler heat insulating cover is supported by the laterally oriented vehicle body frame via the elastic anti-vibration member.

9. The work vehicle as defined in claim 6 , wherein:

an arm member extends from the muffler heat insulating cover to the vehicle body frame; and

as the elastic anti-vibration member is engaged with the arm member, the arm member and the elastic anti-vibration member are fastened and connected to the vehicle body frame together.

10. The work vehicle as defined in claim 6 , further comprising:

a connection pipe that interconnecting an exhaust section of the engine and the muffler; and

a connection pipe heat insulating cover disposed aside the muffler heat insulating member for covering an outer circumference of the connection pipe.