Method for securing a first and a second upright, including the following steps of a) attaching the connectors and b) adjusting the position of the first upright and the position of the second upright such that the first lower end of a first climbing element and the second lower end of second climbing element lie in a plane substantially orthogonal to a climbing direction.

A suspension stacker crane includes an upper truck frame, a pair of mast units, a transferring device, and an upper base. The upper truck frame includes driving trucks arranged side by side in a travelling direction, and a bogie structure that couples the driving trucks. Each of the pair of mast units is suspended from the bogie structure, and includes a lifting drive motor and a lifting drive transmission. The pair of mast units is arranged side by side in the travelling direction. The transferring device is driven to be lifted or lowered by the lifting drive motor and the lifting drive transmission. The upper base links the pair of mast units.

A pallet shelfing apparatus for shelf racking of a pallet in a shelf structure, configured to operate in loading, unloading, and hibernate/transport modes. A transporter thereof transports and positions the platform. On a platform configured for loading and unloading the pallet from a selected shelf of the shelf structure, at least one deployable pallet carrying structure is mounted and configured for carrying, reaching and engaging the pallet. At least one deployable anchor, for temporarily stabilizing the pallet shelfing apparatus against at least one hold is deployed in the loading or unloading mode, to engage the at least one hold for stabilizing, and features the at least one hold located off ground, off ceiling, or inside the volume confined by the convex hull of the shelf structure. This volume may be disposed between the platform and at least one of the at least one hold, while in the loading or unloading mode, at least before changing mode into the hibernate/transport mode. The at least one deployable anchor is configured to change the elevation of the at least one deployable pallet carrying structure, after the carrying structure initially engages the pallet.

A fork assembly can include multiple forks configured to surround a load. Multiple attachments can be made on the forks to couple to straps for support a load. The fork assembly can further include multiple fork extensions having end attachments to couple to straps for pulling on the load. Alternatively, the fork assembly can include multiple fork lifters having blades rotatable between a non-lift position and a lift position. The fork extensions can also have blades rotatable between a non-pullable position and a pullable position. The blade rotation can be performed by a remote rotate mechanism by an operator operating the fork assembly. In some embodiments, the fork attachment assembly for a forklift or a forklift vehicle can include roller legs coupled at far ends of the fork beams or the fork extensions. The fork assembly can include roller legs coupled at far ends of the fork beams or the fork extensions. The fork assembly can include a clamping device coupled at a far end of the fork beam or the fork extension.

A materials handling vehicle is provided including a vehicle power unit, a monomast coupled to the vehicle power unit, and a fork carriage apparatus supported on the monomast. The fork carriage apparatus includes a mast carriage assembly directly coupled to the monomast for vertical movement, a fork carriage mechanism to which forks are mounted, and a reach mechanism coupled to the mast carriage assembly and to the fork carriage mechanism for actuating the fork carriage mechanism to move between an extended position and a retracted position.

The operating machine boom is an operating machine boom 40 including a tubular boom member 41 configured such that an upper member 42 and a lower member 43 with U-shaped sections are welded together with each upper flat portion 42a butting with a corresponding one of lower flat portions 43a. A welded portion 41b between the upper member 42 and the lower member 43 is on a compression portion B side with respect to a stress neutral point P at a boundary between a compression portion B at which compression stress is caused and a tension portion A at which tensile stress is caused when a load acts downwardly on a tip end side of the boom member 41, and a reinforcement member 44 is arranged on an inner surface side of the welded portion 41 b.

A lift truck is configured to suspend a load above the ground and includes a self-propelled vehicle and a boom assembly. The vehicle defines an operator station to support an operator during lift truck use. The boom assembly includes a bifurcated, upright support frame attached relative to the vehicle and an elongated transverse boom. The transverse boom extends longitudinally to present a proximal mounting end and a distal lifting end configured to support the load in a space below the lifting end. The support frame includes a pair of upright supports that are attached relative to the mounting end to cooperatively support the transverse boom. The supports are laterally spaced apart to cooperatively define an upright support opening that permits an operator to view the load from the operator station by looking through the support opening along a longitudinal line of sight.

A material handling vehicle can include a first camera to determine the position of an object in a first camera field of view, and a second camera to determine the position of an object in a second camera field of view. The vehicle may further include a fork position sensor to determine whether one or more forks of the material handling vehicle are extended and/or retracted. In one example, a controller can be in communication with the first sensor, the second sensor, and the fork position sensor, the controller to autonomously control the material handling vehicle to pick-up or drop-off a load based on information from the first camera, the second camera, and the fork position sensor.

Provided is a carriage that is less likely to fall. The carriage includes a first base having wheels, a second base positioned above the first base, a lifting unit for lifting the second base from the first base or lowering the second base to the first base, a loading unit having a fork for holding an object, the loading unit being configured to load or unload an object, and a moving unit for moving the loading unit in a front-rear direction in which the fork extends away from or toward the second base.

Various embodiments provide a material handling vehicle (MHV) and associated method provide for damping of mast oscillations of a mast of the MHV. In one approach, mast oscillations can be detected and/or anticipated and a countering force can be generated by an elevated reach actuator of the MHV to damp the oscillations.