Storage rack system

In a storage rack system for pallet loads having a framework providing a plurality of storage bays each of which is defined by a plurality of vertical uprights and horizontal shelf beams,

• each of said storage bays comprising
• a pair of track means extending from front to back along the depth of said storage bay and being spaced apart across the width of said storage bay,
• a lower cart movable along said track means between a forward position and a back position and including
• a frame providing support for a loaded pallet, said lower cart frame having a pair of sides made of a structural member having a straight undeformed vertical leg, a pair of wheel assemblies on each side of said lower cart frame, and means for supporting each of said lower cart wheel assemblies on said vertical leg of one of said sides of said lower cart frame so that the pair of lower cart wheel assemblies on one side of said lower cart frame are guided by and make good rolling contact with a first guide means of one of said track means as said lower cart moves along the depth of the storage bay between said forward and back positions thereof and so that said pair of lower cart wheel assemblies on the other side of said lower cart frame are guided by and make good rolling contact with a first guide means of the other of said track means as said lower cart moves along the depth of the storage bay between said forward and back positions thereof, each of said lower cart wheel assembly supporting means being fixedly secured directly to said vertical leg of said lower cart frame structural member sop that the load transmitted to each of said lower cart wheel assemblies from said lower cart frame is directed in a vertical direction through said vertical leg, and
• an upper cart movable along said track means between a forward position and back position and including
• a frame providing support for a loaded pallet, said upper cart frame having a pair of sides made of a structural member having a straight undeformed vertical leg, a pair of wheel assemblies on each side of said upper cart frame, and means for supporting each of said upper cart wheel assemblies on said vertical leg of one of said sides of said upper cart frame so that the pair of upper cart wheel assemblies on one side of said upper cart frame are guided by and make good rolling contact with a second guide means of said one track means as said upper cart moves along the depth of the storage bay between said forward and back positions thereof, said vertical leg of said side of said upper cart frame having a straight undeformed vertical extension, each of said upper cart wheel assembly supporting means being fixedly secured directly to said vertical extension so that the load transmitted to each of said upper cart wheel assemblies from said upper cart frame is directed in a vertical direction through said vertical extension,
• said forward positions of both said lower cart and said upper cart being located at the entry end of the storage bay, said back position of said lower cart being located two pallets deep from the entry end of the storage bay, and said back position of said upper cart being located three pallets deep from the entry end of the storage bay,
• said pair of track means being mounted on said storage bay framework so as to be inclined toward the entry end of said storage bay so that said lower cart and said upper cart are supported so that they tend to roll along said track means toward the entry end of said storage bay,
• each of said carts having a bumper plate mounted on the forward end thereof including bumper means associated with each of said lower cart and said upper cart, said bumper means being mounted on the framework of said storage bay in a position to contact said bumper plate of said carts and limit the movement thereof toward the entry end of said storage bay at a location whereby said carts are arrested in their forward positions.

In a storage rack system for pallet loads having a framework providing a plurality of storage bays each of which is defined by a plurality of vertical uprights and horizontal shelf beams,

• each of said storage bays comprising
• a pair of track means extending from front to back along the depth of said storage bay and being spaced apart across the width of said storage bay,
• a lower cart movable along said track means between a forward position and a back position and including
• a frame providing support for a loaded pallet, a pair of wheel assemblies on each side of said lower cart frame, and means for supporting each of said lower cart wheel assemblies so that the pair of lower cart wheel assemblies on one side of said lower cart frame are guided by and make good rolling contact with a first guide means of one of said track means as said lower cart moves along the depth of the storage bay between said forward and back positions thereof and so that said pair of lower cart wheel assemblies on the other side of said lower cart frame are guided by and make good rolling contact with a first guide means of the other of said track means as said lower cart moves along the depth of the storage bay between said forward and back positions thereof, and
• an upper cart movable along said track means between a forward position and back position and including
• a frame providing support for two loaded pallets, a plurality of wheel assemblies on each side of said upper cart frame, and means for supporting each of said upper cart wheel assemblies so that the plurality of upper cart wheel assemblies on one side of said upper cart frame are guided by and make good rolling contact with a second guide means of said on track means as said upper cart moves along the depth of the storage bay between said forward and back position thereof and so that said plurality of upper cart wheel assemblies on the other side of said upper cart frame are guided by and make good rolling contact with a second guide means of said other of said track means as said upper cart moves along the depth of the storage bay between said forward and back positions thereof, said upper cart frame being of a length about twice as long as said lower cart frame so as to be able to support two pallets of a size that form a full lengthwise load on said lower cart frame,
• said forward positions of both said lower cart and said upper cart being located at the entry end of the storage bay, said back position of said lower cart being located two pallets deep from the entry end of the storage bay, and said back position of said upper cart being located to encompass three and four pallets deep from the entry end of the storage bay,
• said pair of track means being mounted on said storage bay framework so as to be inclined toward the entry end of said storage bay so that said lower cart and said upper cart are supported so that they tend to roll along said track means toward the entry end of said storage bay.

In a storage rack system for pallet loads having a framework providing a plurality of storage bays each of which is defined by a plurality of vertical uprights and horizontal shelf beams,

• each of said storage bays comprising
• a pair of track means extending from front to back along the depth of said storage bay and being spaced apart across the width of said storage bay,
• a lower cart movable along said track means between a forward position and a back position and including
• a frame providing support for a loaded pallet, a pair of wheel assemblies on each side of said lower cart frame, and means for supporting each of said lower cart wheel assemblies so that the pair of lower cart wheel assemblies on one side of said lower cart frame are guided by and make good rolling contact with a first guide means of one of said track means as said lower cart moves along the depth of the storage bay between said forward and back positions thereof and so that said pair of lower cart wheel assemblies on the other side of said lower cart frame are guided by and make good rolling contact with a first guide means of the other of said track means as said lower cart moves along the depth of the storage bay between said forward and back positions thereof, and
• a middle cart movable along said track means between a forward position and a back position and including
• a frame providing support for a loaded pallet, a pair of wheel assemblies on each side of said middle cart frame, and means for supporting each of said middle cart wheel assemblies so that the pair of middle cart wheel assemblies on one side of said middle cart frame are guided by and make good rolling contact with a second guide means of one of said track means as said middle cart moves along the depth of the storage bay between said forward and back positions thereof and so that said pair of middle cart wheel assemblies on the other side of said middle cart frame are guided by and make good rolling contact with a second guide means of the other of said track means as said middle cart moves along the depth of the storage bay between said forward and back positions thereof, and
• an upper cart movable along said track means between a forward position and back position and including
• a frame providing support for a loaded pallet, a pair of wheel assemblies on each side of said upper cart frame, and means for supporting each of said upper cart wheel assemblies so that the pair of upper cart wheel assemblies on one side of said upper cart frame are guided by and make good rolling contact with a third guide means of said one track means as said upper cart moves along the depth of the storage bay between said forward and back position thereof and so that said pair of upper cart wheel assemblies on the other side of said upper cart frame are guided by said other of said track means as said upper cart moves along the depth of the storage bay between said forward and back positions thereof,
• said forward positions of said lower cart, said middle cart and said upper cart being located at the entry end of the storage bay, said back position of said lower cart being located two pallets deep from the entry end of the storage bay, said back position of said middle cart being located three pallets deep from the entry end of the storage bay and said back position of said upper cart being located four pallets deep from the entry end of the storage bay,
• said pair of track means being mounted on said storage bay framework at substantially the same elevation and so as to be inclined toward the entry end of said storage bay so that said carts are supported so that they tend to roll along said track means toward the entry end of said storage bay.

In a storage rack system for pallet loads having a framework providing a plurality of storage bays each of which is defined by a plurality of vertical uprights and horizontal shelf beams,

• each of said storage bays comprising
• a pair of track means extending from front to back along the depth of said storage bay and being spaced apart across the width of said storage bay,
• a lower cart movable along said track means between a forward position and a back position and including
• a frame providing support for a loaded pallet, a pair of wheel assemblies on each side of said lower cart frame, and means for supporting each of said lower cart wheel assemblies so that the pair of lower cart wheel asseblies on one side of said lower cart frame are guided by and make good rolling contact with a first guide means of one of said track means as said lower cart moves along the depth of the storage bay between said forward and back positions thereof and so that said pair of lower cart wheel assemblies on the other side of said lower cart frame are guided by and make good rolling contact with a first guide means of the other of said track means as said lower cart moves along the depth of the storage bay between said forward and back positions thereof, and
• a middle cart movable along said track means between a forward position and a back position and including
• a frame providing support for a loaded pallet, a pair of wheel assemblies on each side of said middle cart frame, and means for supporting each of said middle cart wheel assemblies so that the pair of middle cart wheel assemblies on one side of said middle cart frame are guided by and make good rolling contact with a second guide means of one of said track means as said middle cart moves along the depth of the storage bay between said forward and back positions thereof and so that said pair of middle cart wheel assemblies on the other side of said middle cart frame are guided by and make good rolling contact with a second guide means of the other of said track means as said middle cart moves along the depth of the storage bay between said forward and back positions thereof, and
• an upper cart movable along said track means between a forward position and back position and including
• a frame providing support for a loaded pallet, a pair of wheel assemblies on each side of said upper cart frame, and means for supporting each of said upper cart wheel assemblies so that the pair of upper cart wheel assemblies on one side of said upper cart frame are guided by and make good rolling contact with a third guide means of said one track means as said upper cart moves along the depth of the storage bay between said forward and back position thereof and so that said pair of upper cart wheel assemblies on the other side of said upper cart frame are guided by and make good rolling contact with a third guide means of said other of said track means as said upper cart moves along the depth of the storage bay between said forward and back positions thereof,
• said forward positions of said lower cart, said middle cart and said upper cart being located at the entry end of the storage bay, said back position of said lower cart being located two pallets deep from the entry end of the storage bay, said back position of said middle cart being located three pallets deep from the entry end of the storage bay and said back position of said upper cart being located four pallets deep from the entry end of the storage bay,
• said pair of track means being mounted on said storage bay framework so as to be inclined toward the entry end of said storage bay so that said carts are supported so that the y tend to roll along said track means toward the entry end of said storage bay,
• each of said track means comprising a channel means defining a first channel providing said first channel providing said first guide means arranged so that said first guide means of each track means face inwardly toward one another, channel means defining a second channel providing said second guide means so that the second guide means of each track means face outwardly away from one another, and channel means defining a third channel providing said third guide means so that the third guide means of each track means face inwardly toward one another.