Abstract:
A system (92) for retaining a battery (62) on a frame (12) of a vehicle (10) has a retaining device (112) which is movable between a first position at which the battery (62) is free to move in a passing relationship relative to a side (14, 16) of the frame (12) and second position at which the battery (62) is retained on the frame (12) and from passing movement relative to the frame side (14, 16). A sensing device (94) delivers electromagnetic radiation, receives electromagnetic radiation and delivers a first control signal in response to receiving electromagnetic and delivers a second control signal in the absence of receiving electromagnetic radiation. An obstructing device (146) is movable to block the sensing device (94) from receiving electromagnetic radiation in response to the retaining device (112) being at the second position. A controller (30) receives the first and second signals and delivers a vehicle (10) disabling signal in response receiving the second signal. The system (92) is particularly suitable for use on an automatic guided vehicle (10).
Abstract:
An apparatus (100) is adapted to determine the level of liquid in a container (200). The apparatus (100) includes a movable portion (206) and an actuator (222) for moving the movable portion (200) through the liquid. A controller (116) actuates the actuator (222) and senses the rate at which the movable portion (206) moves from a first position towards a second position. The controlled (116) then determines the level of liquid in the container (200) as a function of the rate of movement of the movable portion (206).
Abstract:
A load carrying attachment (48) has a supporting frame (50) mounted on an elevationally movable carriage assembly (38) mounted uprights (32, 34) of a lift mast (30) and a load engaging frame (64) having a load engaging device (68). A connecting device (70) connects the load engaging frame (64) to the supporting frame (50) and guides the load engaging frame (64) for movement in a preselected plane (66) in directions transverse the uprights (32, 34). The load engaging frame (64) is freely transversely movable in the plane (66) in response to an external force being applied to the load engaging frame (50) and alleviates damage to the load engaging frame (50) or a carried load (12) due to misalignment with a transporter (22). A sensing device (158) is provided for sensing the position of the load engaging frame (64) and delivering a vehicle braking signal in response to the load engaging frame (64) being at either a first or a second preselected transverse position. The load carrying attachment (48) is particularly suited for use on an automatic guided vehicle (10).
Abstract:
A navigation system (86) for use in a self guided material handling vehicle (10) provides guidance during operation in areas having densely stacked rows of containers (90) and reduces the potential of deviation of the self guided vehicle (10) from the desired path of travel. A laser signaling device (42) is mounted on the vehicle (10) and rotatable about an axis of rotation (44) extending generally perpendicularly to the longitudinal axis (14) of the self guided vehicle (10). The laser signaling device (42) is adapted to deliver a light beam signal at a first preselected angle (''A'') relative to the axis of rotation (44) and a directing device (46) is provided for directing the delivered light beam signal, during a preselected portion of rotation of the laser signaling device (42), at a second different preselected angle (''B'') relative to the axis of rotation (44). A receiving device (48) receives a reflection of the light beam signal and delivers a position signal in response to the light beam signal received. The navigation system (86) is particularly suited for use in automatic storage and retrieval systems (94).
Abstract:
A hitch assembly (22) and method for connecting a vehicle (10) to a towed apparatus (16) and releasing the towed apparatus (16) from connection to the underlying supporting surface (20) has a tongue (24) which is connected to the towed apparatus (16) and a socket engaging device (44) mounted on the vehicle (10). The socket engaging device is movable from a first position (46) at which the tongue (24) is free form connection to the vehicle (10) to a second position (48) elevationally spaced from the first position (46) at which the tongue (24) is connected to the socket engaging device (44). An actuator (92) which is mounted on the vehicle (10) and connected to the socket engaging device (44) elevationally moves the socket engaging device between the first and second positions (46, 48). A tongue supporting member (74) is movable from a surface supported position (73) to a socket engaging device supported position (75) spaced from the underlying surface (20) in response to movement of the socket engaging device (44) from the first position (46) to the second position (48). The hitch assembly is particularly suited for connecting an automatic guided vehicle (10) to a trailer (16).
Abstract:
Automatic guided vehicles are commonly used in industrial material handling operations. Such vehicles must be accurately docked at predetermined stop locations without the guidance or assistance of human operators. The subject apparatus (10) is used in conjunction with a vehicle (12) having a vehicle drive circuit (14) for controllably propelling the vehicle (12) at a velocity responsive to a velocity command signal. At least one ground engaging wheel (22, 22') is equipped with a vehicle brake (28, 28') for controllably stopping the vehicle (12) in response to a brake actuation signal. A position determining element (74) produces a controlled stop signal in response to the vehicle (12) being positioned a predetermined distance from the desired stop location, and an absolute stop signal in response to the vehicle (12) being positioned at the desired stop location. A logic control circuit (16) receives the stop signals and produces a brake actuation signal having a value sufficient to partially engage the vehicle brake (28, 28') and a velocity command signal having a value sufficient to continue to propel the vehicle (12) at a predetermined low velocity in response to receiving the controlled stop signal. The logic control circuit (16) produces a velocity command signal having a minimum value in response to receiving the absolute stop signal.
Abstract:
Yieldably suspended attachments for lifting trailers or containers are difficult to accurately position. Therefore, load pick-up and deposit is inefficient and inaccurate. A load lifting attachment (27) having an elevationally movable connecting frame (28), a load engaging frame (36) having first and second end portions (40, 42), and first and second link assemblies (82, 88, 106, 108) yieldably connecting the load engaging frame (36) to the connecting frame (28) is provided. The connecting arrangement (104) connects the load engaging frame second end portion (42) to the connecting frame (28), maintains the load engaging frame (36) for free elevational movement relative to the connecting frame (28), and controllably moves the load engaging frame second end portion (42) between elevationally spaced apart locations relative to the connecting frame (28). Therefore, the aforementioned problems related to the positioning of the load lifting attachment (27) are alleviated. The load lifting attachment is particularly suited for use on a material handling vehicle (10) having a lift mast (12).
Abstract:
A control (14) having a primary work system (16), a secondary work system (18), a first fluid flow generating system (20), and a second fluid flow generating system (22). A control signal delivering device (92) is provided to deliver a control signal having a magnitude responsive to relative location of a control valve (56) between a first and second position of a control valve. A control signal receiving device (104) receives the control signal and separately controls the flow rate deliverable from the first and second flow generating system (20, 22) in response to the magnitude of the control signal received. The control signal receiving device (104) has a set point value which is representative of a preselected magnitude of the received control signal.
Abstract:
An apparatus for controllably actuating an electrical device in response to movement of a control member is useful, for example, in an industrial vehicle, including a chassis (16), a power supply (14) electrically isolated from the chassis (16), and a steering assembly (18) having a rotatably connected steering wheel (20). The subject apparatus (10) includes a control member (26) mounted on and rotatable with the steering wheel (20). Excitation means (28) is provided for supplying a predetermined excitation signal to receiving means (32) which responsively produce a control signal. Means (34) is also provided for modifying the control signal in response to a predetermined movement of the control member (26). Controllable means (52) actuate and deactuate the electrical device in response to receiving the control and modified control signals. Thus, the apparatus (10) controllably actuates the electrical device while maintaining the modifying means (34) electrically isolated from the power supply (14). The steering wheel (20) is free to rotate without interconnecting wires or slip rings.
Abstract:
A material handling vehicle (100) has a load engaging implement (210) for controllably loading and unloading a load (200). The load engaging implement (210) has a stationary portion (300) and a movable portion (305). The movable portion (305) is connected to the stationary portion (300) and is movable between extended and retracted positions. The vehicle (100) produces a position signal when the vehicle (100) is positioned adjacent a load (200). A device (400) pivotally connects the load engaging implement (210) to the vehicle frame (115) and pivotally moves the load engaging implement (210) in a first direction to a first angular position in response to receiving a first signal and in a second direction to a second angular position in response to receiving a third signal. A first driving unit (310) extends the movable portion (305) in response to receiving a second signal and retracts the movable portion (305) in response to receiving a fourth signal. A controller (705) produces the first signal in response to receiving the position signal, produces the second signal in response to the load engaging implement (210) being at the first angular position, produces the third signal in response to the movable portion (305) being at the extended position, and produces the fourth signal in response to the load engaging implement (210) being at the second angular position. The vehicle (100) automatically positions the load engaging implement (210) in a manner that provides for an optimum amount of flexibility for a material handling system.