Abstract: A fastening and loosening device includes transport devices capable of moving along the array direction of a plurality of stud bolts, control panels that independently control the transport devices, a plurality of bolt tensioners, control panels that independently control the bolt tensioners, and a transport operating device having a control panel that controls the control panels and the control panels, and a fault diagnosis device is provided by connecting the control panels to the transport operation device through power cables, whereby the reliability of the device can be improved.

Abstract: A fastening and loosening device is provided with a device main body (101) having an upper portion supported along an arrangement direction of stud bolts (65) in a freely movable manner by a conveyance device (73), a bolt tensioner (102) freely ascendable/descendable with respect to the stud bolts (65) together with the device main body (101) by a lift device (74), a guide device (103) coupled with the device main body (101) in a freely relatively movable manner via a cylinder (121) and having right and left guide members (123 and 124) contactable with an outer periphery of a nut (66) from both the right and left sides of a moving direction of the device main body (101), and a guide position adjustment device (105) capable of moving an inner guide member (123) in a horizontal direction intersecting with the moving direction of the device main body (101).

Abstract: A fastening and loosening device is provided with a device main body (101) having an upper portion supported along an arrangement direction of stud bolts (65) in a freely movable manner by a conveyance device (73), a bolt tensioner (102) freely ascendable/descendable with respect to the stud bolts (65) together with the device main body (101) by a lift device (74), a guide device (103) coupled with the device main body (101) in a freely relatively movable manner via a cylinder (121) and having right and left guide members (123 and 124) contactable with an outer periphery of a nut (66) from both the right and left sides of a moving direction of the device main body (101), and a guide position adjustment device (105) capable of moving an inner guide member (123) in a horizontal direction intersecting with the moving direction of the device main body (101).

Abstract: A bolt tensioner is provided with: a housing; a puller bar; an oil pump unit; a puller bar socket; a locking ring; a nut socket; and a nut rotation device. The housing is structured with a first housing that houses the puller bar and a second housing that houses the nut socket, and the first and second housings are integrally connected so that regardless of the shape of the member to be fastened, nuts can be appropriately fastened to/loosened from stud bolts.

Abstract: A fastening and loosening device includes transport devices capable of moving along the array direction of a plurality of stud bolts, control panels that independently control the transport devices, a plurality of bolt tensioners, control panels that independently control the bolt tensioners, and a transport operating device having a control panel that controls the control panels and the control panels, and a fault diagnosis device is provided by connecting the control panels to the transport operation device through power cables, whereby the reliability of the device can be improved.