Abstract: A work gondola comprises a suction attachment device which is mounted on a front portion of the gondola opposing an outer wall of a building, and which couples and fixes the gondola to the outer wall of the building while being attached to the outer wall of the building by suction. The suction attachment device is formed from a first support column extending in a front-rear direction from the front portion of the gondola, a second support column mounted on the front portion of the gondola and extending in a width direction, and a vacuum gripper attached to a distal-end portion of the first support column. The work gondola which can be fixed onto the outer wall of a building to achieve positional stabilization in the air, and which enables accurate and reliable performance of work involved in various construction operations.

Abstract: [Problem] A mortar peeling method which can keep a sound generated during a peeling work to an allowable quiet sound and can peel a mortar off a concrete framework smoothly. [Solution] In a mortar peeling method, by gradually extending a piston rod 42 of a hydraulic jack 13 in a mortar peeling device 10A forward in one direction, a cutter 14 is gradually advanced forward in one direction so as to execute a mortar peeling process of peeling a mortar 21 with a predetermined thickness off a concrete framework 20 by using the cutter 14. In the mortar peeling method, after the piston rod 42 of the hydraulic jack 13 is extended forward in one direction and the mortar 21 is peeled, by retreating the piston rod 42 rearward in one direction, a session of the mortar peeling process is completed.

Abstract: A mounting base (10A) that shortens construction time and reduces cost is formed from a metal foundation (16), a metal cover (17), height-adjusting bolts (18), support bolts (19), and mortar (20). In the base (10A), the first fixed ends (47) of the bolts (19) are inserted into support bolt insertion holes (39) formed in a metal plate (24) and are fixed to the metal plate (24) with nuts (50), and the second fixed ends (48) of the bolts (19) are fixed to a concrete slab (12) with nuts (51). The portion of the first fixed ends (47) of the bolts (19) which extends between the metal plate (24) and the top surface of the concrete slab (12) is integrated with the mortar (29) filled into the space (46), and the metal cover (17) covers the opening (27) at the top of a metal tube (23).

Abstract: [Problem] A mortar peeling method which can keep a sound generated during a peeling work to an allowable quiet sound and can peel a mortar off a concrete framework smoothly. [Solution] In a mortar peeling method, by gradually extending a piston rod 42 of a hydraulic jack 13 in a mortar peeling device 10A forward in one direction, a cutter 14 is gradually advanced forward in one direction so as to execute a mortar peeling process of peeling a mortar 21 with a predetermined thickness off a concrete framework 20 by using the cutter 14. In the mortar peeling method, after the piston rod 42 of the hydraulic jack 13 is extended forward in one direction and the mortar 21 is peeled, by retreating the piston rod 42 rearward in one direction, a session of the mortar peeling process is completed.

Abstract: A mounting base is formed from a metal foundation, height adjustment bolts for adjusting the height dimension of the foundation, support bolts inserted into support bolt insertion holes, a metal cover installed on the foundation, and mortar filling the space between the foundation and the upper surface of a concrete slab. In the base, the first fixed ends of the bolts are inserted into insertion holes formed in a metal plate and are fixed to the metal plate with nuts, and the second fixed ends of the bolts are fixed to a steel beam with nuts. The portion of the first fixed ends of the bolts which extends between the metal plate and the top surface of the concrete floor is integrated with the mortar filling the space, and the metal cover covers the opening at the top of a metal tube of the foundation.

Abstract: A peeling device, which can keep a sound generated during a peeling work to an allowable quiet sound, includes a guide member extending in one direction in parallel with an outer surface of a mortar, a fastening assembly for preventing movement of the guide member in a direction away from the outer surface of the mortar, a hydraulic jack having a piston rod extendable forward in one direction and located between the mortar and the guide member, a connector for detachably connecting the jack to the guide member, and a cutter located at a tip end portion of the piston rod and peeling the mortar off the concrete framework. With gradual extension of the rod of the jack forward in one direction, the cutter gradually advances forward in one direction, and a cutting edge of the cutter peels the mortar with a predetermined thickness off the concrete framework.

Abstract: A mounting base (10A) that shortens construction time and reduces cost is formed from a metal foundation (16), a metal cover (17), height-adjusting bolts (18), support bolts (19), and mortar (20). In the base (10A), the first fixed ends (47) of the bolts (19) are inserted into support bolt insertion holes (39) formed in a metal plate (24) and are fixed to the metal plate (24) with nuts (50), and the second fixed ends (48) of the bolts (19) are fixed to a concrete slab (12) with nuts (51). The portion of the first fixed ends (47) of the bolts (19) which extends between the metal plate (24) and the top surface of the concrete slab (12) is integrated with the mortar (29) filled into the space (46), and the metal cover (17) covers the opening (27) at the top of a metal tube (23).

Abstract: A mounting base is formed from a metal foundation, height adjustment bolts for adjusting the height dimension of the foundation, support bolts inserted into support bolt insertion holes, a metal cover installed on the foundation, and mortar filling the space between the foundation and the upper surface of a concrete slab. In the base, the first fixed ends of the bolts are inserted into insertion holes formed in a metal plate and are fixed to the metal plate with nuts, and the second fixed ends of the bolts are fixed to a steel beam with nuts. The portion of the first fixed ends of the bolts which extends between the metal plate and the top surface of the concrete floor is integrated with the mortar filling the space, and the metal cover covers the opening at the top of a metal tube of the foundation.