JPH0711641Y2 - Fall prevention device for moving shelves - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention device for a mobile shelf.

[0002]

2. Description of the Related Art Heretofore, as fall prevention devices for movable shelves, those described in JP-B-53-35138 and JP-B-2-27793 have been known. In the former publication, two types of fall prevention members, which are a support plate to which a vertical roller supported by a horizontal rotation shaft is attached and a support plate to which a contact plate is fixedly attached, are attached upward to a top plate of a moving shelf. Then, these fall prevention members are fitted and inserted into the guide rails having a channel-shaped cross section which is horizontally installed above the movable rack along the movement direction, and when the movable rack falls, the horizontal rotation shaft and the upper part of the support plate are In the case of falling in the opposite direction, the lower surface of the contact plate and the vertical roller respectively contact the inner peripheral surface of the guide rail, and the frictional force generated thereby prevents the moving shelf from falling.

Further, in the latter publication, a pipe rail which is horizontally installed above the movable rack along the moving direction is circumferentially surrounded by a rising plate of a bracket fixedly attached to a top plate of the movable rack. When the movable rack falls down so that it is sandwiched between the pipe rail horizontal member and the roller, the lower surface of the pipe rail horizontal member and the upper surface of the pipe rail as well as the upper surface of the roller and the lower surface of the pipe rail come into contact with each other, and the movable rack falls due to the frictional force generated thereby What has been prevented is described.

[0004]

However, in the prior arts described in both publications, one of the overturning prevention members that abuts the guide rail or the pipe rail when the moving shelf is overturned has a horizontal rotation shaft, While the other is a rotating member such as a roller, the other is a plate-shaped member such as a support plate, a contact plate, and a pipe rail lateral member having a poor sliding function, and therefore excessive frictional force is generated when these members come into contact with each rail. In particular, when the movable rack is slid while these members are in contact with the rails, the frictional force becomes even stronger.

This does not impair the smooth contact between the above-mentioned members and the respective rails and the smooth sliding of the movable shelves, so that the supporting plate, the abutment plate or the pipe rail lateral members and the movable shelves, which are plate-like members, are not damaged. There is a problem that excessive force is applied to the fixed portion of the top plate and the guide rail or the pipe rail that is the rotating member, and these members are deformed and damaged.

The present invention has been made in view of the above problems, and it is an object of the present invention to prevent deformation and damage of the fall-prevention member and to operate the movable shelf safely and smoothly.

[0007]

In order to solve the above-mentioned problems, in a fall prevention device for a movable rack of the present invention, a cross-section channel opened downward above a large number of movable racks that can travel on rails laid on the floor surface. A vertical guide rail horizontally installed and fixed to the upper surface of each movable rack with a mounting bracket fitted into the guide rail and abutting on the upper surface of the lower piece of the guide rail. It is characterized in that a roller and a vertical roller that comes into contact with the lower surface of the lower piece of the guide rail to rotate are axially supported.

[0008]

According to the present invention, when the movable shelf falls, the vertical roller which is fitted into the guide rail and rotates by contacting the upper surface of the lower piece of the guide rail and the lower surface of the lower piece of the guide rail which rotates. Since the guide rails are sandwiched by the vertical rollers, the smooth contact between the rollers and the guide rails and the smooth sliding of the movable rack are possible.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a rail (2) is laid on the floor surface (1), and a shelf storage surface (not shown) orthogonal to the rail (2) faces the rail (2). Multiple moving shelves
(3) is provided so that it can travel freely by traveling wheels (4). A fixed shelf (5) is arranged at one end of the movable shelf (3).

As shown in FIG. 2, a mounting bracket (7) having a downward opening is fixed to the upper surface (6) of the fixed shelf (5), and the inner surface of the mounting bracket (7) has a lower surface. A guide rail (9) having a channel opening in the downward direction, which has a piece (8), is provided. The guide rail (9) has a fixed wall at one end.
It is attached to (10) and is horizontally installed above the moving shelf (3).

On the upper surface (11) of the movable shelf (3), a mounting bracket (12) having a downward opening, which is slightly larger than the mounting bracket (7) described above.
Is fixed, and the guide rail is installed in the mounting bracket (12).
(9) penetrates.

As shown in FIG. 3, the mounting bracket (12) has two
A number of vertical roller units (13), (13) are attached. In the vertical roller unit (13), two pairs of vertical rollers (14) and (14) are fitted into the guide rail (9) and contact the upper surface of the lower piece (8) of the guide rail (9). It is provided above the mounting bracket (12) so as to rotate (see FIG. 6).

A pair of vertical rollers (14), (14) are provided with a shaft (15).
It is rotatably attached to the bracket (16) via.
The bracket (16) has a U-shaped cross section, and a horizontal shaft (17) is fixed to the center of the bracket (16), and a vertical shaft (18) is attached to the horizontal shaft (17). A cylindrical member (19) is provided on the vertical shaft (18). At the lower end of the vertical shaft (18), a support block (20) is horizontally supported in the mounting bracket (12), and the support block (20) is provided on the side surface of the mounting bracket (12). Hole (21)
The vertical roller unit (13) is mounted in the mounting bracket (12) by tightening the bolts (22). The position of the vertical roller unit (13) with respect to the mounting fitting (12) is finely adjusted by adjusting the position of the bolt (22) within the elongated hole (21).

A vertical roller (23), which is wider than the vertical roller (14), is rotatably supported at both lower ends of the mounting bracket (12).
It is pivotally supported by (24) and abuts on the upper surface of the lower piece (8) of the guide rail (9) so as to rotate (see FIG. 6). Incidentally, (25) is a retaining pin of the support shaft (24), and (26) is a bolt hole of the support block (20).

As is clear from the above description, the vertical rollers (14), (23) function as a fall prevention member for the movable rack (3).

Next, the operation will be described. In normal times, the traveling wheels (4) are guided by the rails (2) and the moving shelves (3)
Slides. At that time, the vertical roller (14) axially supported by the mounting bracket (12) is fitted into the guide rail (9) and abuts on the upper surface of the lower piece (8) of the guide rail (9) to rotate, Also, the vertical roller (23) pivotally supported by the mounting bracket (12) is
Since the lower piece (2) of the (2) is in contact with the lower surface of the lower piece (8) and is rotating, the movable shelf (3) slides smoothly.

Next, when the movable rack (3) is sliding, for example, when the movable rack (3) is about to fall due to a vibration caused by an earthquake, the movable rack (3) is inserted into the guide rail (9). A vertical roller (14) that rotates by contacting the upper surface of the lower piece (8) of the guide rail (9) and a vertical roller (23) that rotates by contacting the lower surface of the lower piece (8) of the guide rail (9). The guide rail (9) is clamped.

That is, in FIG. 6, the movable rack (3) is X.
When trying to fall in the direction, the vertical roller (14) of the left vertical roller unit (13) should be
(8) Abut on the upper surface, the vertical roller (23) of the right vertical roller unit (13) abuts on the lower surface of the lower piece (8) of the guide rail (9), and at this abutting location, the moving shelf (3 ) Is generated in the X direction, a frictional force against the rotational force is generated to prevent the movable shelf (3) from falling.

When the movable rack (3) is about to fall in the direction opposite to the X direction, the right vertical roller unit (13)
Vertical roller (14) of the left side of the guide rail (9) is in contact with the upper surface of the lower piece (8) of the guide rail (9), and the vertical roller (23) of the left vertical roller unit (13) is the lower surface of the lower piece (8) of the guide rail (9). As described above, a frictional force is generated at the abutting position, and the movable rack (3) is prevented from falling.

At this time, since only the vertical rollers (14) and (23) are in contact with the guide rail (9), no excessive frictional force is generated at the contact points, so the vertical roller unit (13) ) And the mounting bracket (12), that is, the bolt (22) connecting part of the support block (20) and the guide rail (9), without giving an unnatural load, the vertical roller unit (13), and by extension each The rollers (14), (23) and the guide rail (9) are prevented from being deformed or damaged, and the rollers (14), (23) and the guide rail (9) are prevented.
Can be smoothly contacted.

Further, even if the movable rack (3) is slid in this abutting state, as described above, since an excessive frictional force is not generated at the abutting portion, the sliding is smoothly performed. It is possible to safely and smoothly operate the mobile shelf (3).

Although the embodiments have been described above with reference to the drawings, the specific configuration is not limited to the embodiments, and modifications and additions within the scope of the invention are included in the invention. Be done.

For example, in the embodiment, one pair of vertical rollers that rotate by contacting the upper surface of the lower piece (8) of the guide rail (9) was used. Alternatively, a wide one may be used.

[0024]

As described above, according to the present invention, the following effects can be obtained. (1) When the movable shelf falls, the guide rail is fitted into the guide rail and rotates by contacting the upper surface of the lower piece of the guide rail and rotating by a vertical roller rotating by contacting the lower surface of the lower piece of the guide rail. Since an excessive frictional force is not generated at the abutting portion because the paper is sandwiched, the vertical roller and the guide rail are prevented from being deformed and damaged, and the vertical roller and the guide rail are brought into contact with each other smoothly.

(2) Even if the movable rack is slid while the vertical roller and the guide rail are in contact with each other, an excessive frictional force does not occur at the contact portion, so that the sliding is performed smoothly and safety is ensured. In addition, it is possible to operate the moving rack smoothly.

[Brief description of drawings]

FIG. 1 is a front view of a mobile shelf to which an embodiment of the present invention is applied.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partially cutaway front view showing a state in which a vertical roller is axially supported by a mounting bracket of a movable shelf according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a side view of a mounting bracket for a moving shelf that axially supports a vertical roller according to an embodiment of the present invention.

FIG. 6 is a partially cutaway front view of a state in which a vertical roller pivotally supported by a mounting bracket of a movable shelf of the present invention is in contact with a guide rail.

FIG. 7 is a sectional view taken along line CC of FIG.

[Explanation of symbols]

(1) Floor surface (2) Rail (3) Moving shelf (4) Traveling wheel (5) Fixed shelf (6) Fixed shelf top surface (7) Mounting bracket (8) Guide rail lower piece (9) Guide rail (10) Fixed wall (11) Mobile shelf top (12) Mounting bracket (13) Vertical roller unit (14) Vertical roller (15) Axis (16) Bracket (17) Horizontal axis (18) Vertical axis (19) Cylindrical member (20) ) Support block (21) Long hole (22) Bolt (23) Vertical roller (24) Support shaft (25) Lock pin (26) Bolt hole

Claims (1)

[Scope of utility model registration request] 1. A plurality of movable shelves that can travel freely on rails laid on the floor are horizontally installed with guide rails having a channel-shaped cross section open downward, and mounting brackets are fixed to the upper surface of each movable shelf. Then, in the mounting bracket, a vertical roller that is inserted into the guide rail and abuts on the lower surface of the lower piece of the guide rail to rotate, and a vertical roller that abuts and rotates on the lower surface of the lower piece of the guide rail, A fall prevention device for mobile shelves, each of which is pivotally supported.