A grain storehouse includes a granary, a grain loading system, and a grain unloading system. The granary includes multiple storages arranged in a network format. The bottom of each storage is a tapered structure with a tapered surface downward, and the bottom of the tapered structure provides a switchable blanking exit. The grain loading system includes a lattice girder structure, a plurality of conveyors and multiple hoppers. The grain unloading system includes at least one conveyor that is located under the blanking exit. The present invention improves the automaticity and efficiency of grain loading and unloading of the grain storehouse, so that the grain can be transferred quickly.

A combination weighing apparatus 1 includes a pool hopper 5 and a support body 11. An attached portion 30 of the support body 11 has first defining portions 34 and 39 and second defining portions 35 and 40, support portions 36 and 41 capable of supporting a first locking member 24, and guide portions 37 and 42 disposed on the track of a second locking member 25 at a time when the pool hopper 5 is swung to the support body 11 side about the first locking member 24 with the first locking member 24 supported by the support portions 36 and 41 and guiding the second locking member 25 such that the second locking member 25 moves to the lower side in a height direction with respect to a position on the track and is positioned in the second defining portions 35 and 40.

A combination weighing apparatus 1 includes a pool hopper 5 and a support body 11. An attached portion 30 of the support body 11 has first defining portions 34 and 39 and second defining portions 35 and 40, support portions 36 and 41 capable of supporting a first locking member 24, and guide portions 37 and 42 disposed on the track of a second locking member 25 at a time when the pool hopper 5 is swung to the support body 11 side about the first locking member 24 with the first locking member 24 supported by the support portions 36 and 41 and guiding the second locking member 25 such that the second locking member 25 moves to the lower side in a height direction with respect to a position on the track and is positioned in the second defining portions 35 and 40.

When one of the objects placed on a placement board is sucked and held by a suction nozzle and is taken out by an actuator under the control of an operation controller, a first acquirer acquires a difference M between a first moment M1 applied to the suction nozzle and a second moment M2 applied to the suction nozzle when the object is taken out by the suction nozzle by a first taking-out movement distance. The operation controller performs control, based on the acquired difference between the moments, whether the taking-out operation is to be further continued.

When one of the objects placed on a placement board is sucked and held by a suction nozzle and is taken out by an actuator under the control of an operation controller, a first acquirer acquires a difference M between a first moment M1 applied to the suction nozzle and a second moment M2 applied to the suction nozzle when the object is taken out by the suction nozzle by a first taking-out movement distance. The operation controller performs control, based on the acquired difference between the moments, whether the taking-out operation is to be further continued.

Features for loading, transporting and unloading of items are disclosed. Systems, devices and methods for such operations using a tray are described. In some embodiments, a tray having a moveable bottom allows for switching between a configuration for loading and unloading items in and out of the tray and a configuration for transportation of items inside the tray. The trays may also be stacked, for transportation of multiple trays at once, and nested, for saving space when storing the trays. In some embodiments, the trays may be used in conjunction with loading and unloading systems.

Features for loading, transporting and unloading of items are disclosed. Systems, devices and methods for such operations using a tray are described. In some embodiments, a tray having a moveable bottom allows for switching between a configuration for loading and unloading items in and out of the tray and a configuration for transportation of items inside the tray. The trays may also be stacked, for transportation of multiple trays at once, and nested, for saving space when storing the trays. In some embodiments, the trays may be used in conjunction with loading and unloading systems.

A method is disclosed for storing and moving proppant. A supply of fracking proppant is provided at a remote location. A plurality of containers are provided to the desired location, each container having a top, a plurality of walls extending from the top and terminating at an outlet for discharge of proppant therefrom and a flow gate positioned adjacent the outlet to control flow of proppant from an interior volume of the container through the outlet. The plurality of containers are filled with fracking proppant at the remote location, then transported from the remote location to a well site location. The plurality of containers are staged at the well site location and the amount of proppant on hand at the well site location is tracked.

A method is disclosed for storing and moving proppant. A supply of fracking proppant is provided at a remote location. A plurality of containers are provided to the desired location, each container having a top, a plurality of walls extending from the top and terminating at an outlet for discharge of proppant therefrom and a flow gate positioned adjacent the outlet to control flow of proppant from an interior volume of the container through the outlet. The plurality of containers are filled with fracking proppant at the remote location, then transported from the remote location to a well site location. The plurality of containers are staged at the well site location and the amount of proppant on hand at the well site location is tracked.

Features for loading, transporting and unloading of items are disclosed. Systems, devices and methods for such operations using a tray are described. In some embodiments, a tray having a moveable bottom allows for switching between a configuration for loading and unloading items in and out of the tray and a configuration for transportation of items inside the tray. The trays may also be stacked, for transportation of multiple trays at once, and nested, for saving space when storing the trays. In some embodiments, the trays may be used in conjunction with loading and unloading systems.