JPH0227793Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fall prevention device for a movable shelf.

BACKGROUND ART Mobile shelving devices have been widely used in the past to make effective use of limited floor space. In this type of shelving device, a rail is laid on the floor, and several movable shelves with wheels are arranged on the rail, and these movable shelves can be moved to take out stored items from any shelf. It is now possible to enter. In such a shelving device, there is a risk that the movable shelves may fall over, for example, in the event of an earthquake or if an obstacle or the like is caught in the passage between the shelves.

The present invention aims to prevent such overturning of movable shelves.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 indicates a fixed wall, and 2 indicates a fixed shelf. Between the fixed wall 1 and the fixed shelf 2, there is a running wheel 5 at the bottom that rolls on a pair of rails 4 (only one is shown) laid on the floor 3, which allows movement. Movable shelf 6
Four are arranged. Each end has a fixed wall 1
A pipe rail 7 fixed to the fixed shelf 2 extends horizontally above the movable shelf 6 along the moving direction of the movable shelf. At the top of each movable shelf 6, brackets 8, 9 having a U-shaped cross-section (see FIG. 3) are arranged at a certain distance apart in the direction of movement of the movable shelf 6, as shown in FIG. The bottom plate portions 8a and 9a of each bracket are fixed to the top of the shelf by bolts (not shown). Between the rising plates 8b, 8b or 9b, 9b of each bracket, there is provided a recessed portion 10a that extends in a direction transverse to the axis of the pipe rail 7 and is slightly wider than the diameter of the pipe rail 7. A horizontal member 1 formed by vertically disposing locking protrusions 10b at both ends of a portion 10a.
0 and a shaft 11 are provided spaced apart from each other in the vertical direction. The shaft 11 has an inner peripheral surface 12a that is slightly wider than the diameter of the pipe rail 7, and an outer peripheral edge 12 that has a larger diameter than the inner peripheral surface 12a.
A saddle-shaped roller 12 made of synthetic resin or the like and protruding from both ends of b is rotatably supported. The horizontal member 10, the roller 12, and the rising plates 8b, 8b, 9 of each bracket 8, 9
b, 9b surround the pipe rail 7 in the circumferential direction, and are provided in a positional relationship such that the pipe rail 7 is sandwiched between the horizontal member 10 and the rollers 12. As shown in FIG. 3, the roller 12 has an inner peripheral surface 12a and a pipe rail 7.
The horizontal member 10 has a slight gap G between the recess 10a and the pipe rail 7, so that when the movable shelf 6 normally moves, the horizontal member 10
It is preferable that the pipe rail 7 is disposed so that the pipe rail 7 has a gap G large enough to prevent the pipe rail 7 from coming into contact with the pipe rail 7.

Next, the operation of such a fall prevention device will be explained.

In normal times, the traveling wheels 5 are guided by the rails 4 and the movable shelf 6 moves. At this time, since a slight gap is formed between the horizontal member 10, the rollers 12, and the pipe rail 7, the movement of the movable shelf 6 on the rail 4 is not affected, and even if the weight of the pipe rail 7 is Even if the rollers 12 come into contact with the pipe rail 7 due to deflection or non-uniform diameter, the movement of the movable shelf 6 will not be hindered because the rollers 12 are rotatable.

In the event of an abnormality, for example, when the movable shelf 6 is moved or stopped, the movable shelf 6 may be shaken by an earthquake, or something may be caught between the shelves during movement.
When a rotational force acting in the direction of the arrow in the figure is applied, the movable shelf 6 tries to fall counterclockwise in FIG. 7, and the upper side of the inner peripheral surface 12a of the roller 12 of the other bracket 8 is in contact with the upper peripheral surface of the pipe rail 7.
The brackets 8 and 9 each have a horizontal member 10 and a roller 1 of the same shape.
2 is installed in the recessed part 10a of the horizontal member 10.
The friction coefficients of the contact surface between the outer circumferential surface of the pipe rail 7 having an annular cross section and the contact surface between the inner circumferential surface 12a of the roller 12 and the pipe rail 7 are almost the same; Since an excessive impact is not applied only to the horizontal member or roller of one side of the bracket, there is no risk of damage to the pipe rail 7, and furthermore, the pipe rail 7 is attached to each bracket 8, 9, Since the horizontal member 10 and the rollers 12 surround the pipe rail 7, the horizontal member 10 and the rollers 12 do not come off from the pipe rail 7, and the movable shelf 6 is protected from the rotational force that tends to overturn the movable shelf 6 at their contact points. A counter-frictional force is generated and the fall is prevented.

In addition, when a vibration acts in the lateral direction of the movable shelf 6 (in a direction perpendicular to the moving direction of the movable shelf), the locking protrusion 10b of the horizontal member 10 and the large diameter outer peripheral edge 12b of the roller 12 are attached to the pipe rail. The peripheral surfaces of the movable shelves 6 can also prevent the movable shelves 6 from falling in the lateral direction.

On the other hand, when a rotational force acts in the direction opposite to the direction of the arrow in FIG.
The upper circumferential surface of the bracket 2 contacts the lower circumferential surface of the pipe rail 7, and the lower surface of the horizontal member 10 of the other bracket 8 abuts the upper circumferential surface of the pipe rail 7, so that, as in the case described above, Frictional force is generated at each contact point to prevent it from falling over.

As explained above, the fall prevention device according to the present invention has the effect of not having any effect on the movement of the movable shelf under normal conditions, but working to prevent the movement of the movable shelf when it falls. It is something.

In addition, in the embodiment shown in FIG. 1, the ends of the pipe rail 7 are fixed to the fixed wall 1 and the fixed shelf, respectively, but only one end of the pipe rail 7 is attached to either the fixed wall or the fixed shelf. The same effect can be obtained by fixing the end to the end and leaving the other end free. Furthermore, in cases where there is no fixed object such as a fixed wall or a fixed shelf, or where it is not possible to provide such, one of the movable shelves of the shelving system (preferably The same effect as described above can be obtained even if a pipe rail is fixedly installed at the end (one of the ends) and the pipe rail is given some degree of mobility. In this case, the roller 12 is used to hold the pipe rail that hangs down due to its own weight.
becomes supported.

Further, in this embodiment, the horizontal member 10 has a rectangular cross section as shown in FIG. 2, and a curved lower surface side as shown in FIG. The same effect can be obtained even if it is provided separately.

Note that the fall prevention device according to the present invention can be applied to a shelving device having either a manual type or an electric type movable shelf.

[Brief explanation of the drawing]

FIG. 1 is a front view of a shelving device to which an embodiment of the present invention is applied, FIG. 2 is an enlarged partially cutaway sectional view of the embodiment of FIG. 1, and FIG. It is a broken side view seen from - line. 6...Movable shelf, 7...Pipe rail, 8, 9...
...Bracket, 8b, 9b...Rising plate, 10...
...Horizontal member, 10a... Recess, 10b... Locking protrusion, 11... Shaft, 12... Roller, 12a... Inner peripheral surface, 12b... Outer peripheral edge, G... Gap.

Claims (1)

[Scope of utility model registration request] A pipe rail that is held horizontally above the movable shelf along the moving direction of the movable shelf, and a rising board that is arranged in parallel at an interval in the moving direction of the movable shelf on the upper part of the movable shelf. A horizontal member having a U-shaped cross section, a recessed portion, and a shaft and a horizontal member formed by vertically fixing a locking protrusion at both ends are spaced apart from each other, and each bracket is The pipe rails are arranged and fixed in parallel in the upper and lower directions, and saddle-shaped rollers having outer circumferential edges projecting from both ends that are larger in diameter than the inner circumferential surfaces are rotatably supported on the shafts. An overturn prevention device for a movable shelf, characterized in that the device extends between the horizontal member and the roller, with a slight gap between the recessed part of the horizontal member and the inner peripheral surface of the roller. .