JPS6125391Y2 - - Google Patents

Description

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

In a movable shelf device in which a plurality of movable shelves are arranged so as to be movable on a track, a desired shelf passage is formed, and when a worker is working in the passage, others do not notice the presence of the worker. When the shelves are moved, the worker ends up being caught between the shelves. Alternatively, in addition to this kind of human-induced movement, it is also possible that the shelf is thrown out of control due to an earthquake.

As a safety device to deal with such situations, a safety bar with a length equal to or shorter than the width of the aisle is pivotally attached to the shelf support facing the aisle, and the safety bar is kept in a horizontal state when in use. There is a known device that restricts the movement of opposing shelves.

In such a device, when a large earthquake occurs, each shelf swings back and forth and left and right, and the tip of the safety bar and the contact surface (shelf support surface) of the opposing shelf that the safety bar should come into contact with are If the shelves are shifted from each other, movement of the shelves cannot be reliably prevented, and in some cases, there is a risk that stored items may be pushed down by the safety bar. Such a phenomenon is likely to occur in safety bars that are shorter than the width of the inter-shelf passage.

In order to avoid the above drawbacks, there are methods of making the tip of the safety bar wider or attaching a locking piece that engages with the tip of the safety bar to the shelf support of the opposing shelf. In the former, Making it extremely wide in order to achieve the desired effect is difficult to adopt because it obstructs the work of putting in and taking out stored items and is unfavorable in appearance.In the latter case, if the locking piece is small, the tip of the safety bar Since it cannot be expected that the parts can be held securely at all times, a relatively large piece must be installed protrudingly, which is unsightly and becomes an obstacle when using the shelf, so it is difficult to adopt it like the former. .

In view of the above circumstances, the present invention pivots the base end of the movement regulating member to the shelf support so that it can swing freely in the vertical direction,
A pressing piece with a large coefficient of friction (μ ₀ ) (made of a material having a coefficient of friction greater than that between steel members) is attached to the tip of the movement regulating member, and shelf supports of opposing shelves are attached, and Provide clamping pieces that can be freely fitted and removed from the left and right sides of the shelf support supporting the movement regulating member, and √ ² − ² /W
<μ ₀ (where W is the interval length between the shelf supports when the maximum passage width is formed) is satisfied, and when the passage is formed to the maximum passage width, the movement regulating member is at the base end. The safety device for the movable shelf is configured by setting the length L of the movement regulating member so that the pressing piece comes into contact with the shelf support of the opposing shelf in a posture gently tilted diagonally upward from the movable shelf. The purpose is not only to ensure the safety of people, but also to provide a safety device for movable shelves with a simple structure that can reliably maintain passages between shelves even in the event of a large earthquake. be.

In the present invention, when the relational expression √ ² − ² /W<μ ₀ is satisfied as described above, and a passage is formed between the desired shelves of the movable shelves to have the maximum passage width, the movement regulating member, which is laid sideways, The length of the movement regulating member is set so that the pressing piece touches the shelf support of the opposing shelf in a position that is gently inclined diagonally upward from the end, so even if the shelf shakes due to an earthquake. Coupled with the clamping action of the clamping piece on the opposing shelf support, the tip of the movement regulating member is always in contact with the opposing shelf to reliably prevent movement of the opposing shelf, and furthermore, the movement regulating member There is no need for a support member to maintain the sideways posture, and the structure is extremely simple.

Furthermore, since the pressing piece is made of a piece with a large coefficient of friction (μ ₀ ), the angle of inclination (θ) when the movement regulating member falls sideways is set to tan ⁻¹ μ according to the coefficient of friction (μ ₀ ).
By setting the angle to be smaller than ₀ , it is possible to deal with variations in passage width when forming inter-shelf passages.

Furthermore, if the movement regulating member is laid down horizontally and the clamping piece at the end is fitted to the opposing shelf support, an external force in the horizontal direction parallel to the shelf frontage surface will act on the moving shelf, causing the shelves to overlap each other. Even if the support is displaced in the horizontal direction parallel to the frontage surface, the movement regulating member will not come off from the opposing shelf support.

As described above, according to the present invention, even if a large earthquake occurs while the shelf aisle is in use, or even if another person attempts to move the shelf, the movement can be reliably prevented, making it extremely safe.

Next, one embodiment of the present invention will be explained with reference to FIGS. 1 to 4.

A fixed shelf 3 is erected on a base 1, and a plurality of movable shelves 5 movable on wheels 4 are arranged on a pair of guide rails 2 also laid on the base 1. .

Therefore, on the frontage side of each of the fixed shelf 3 and each movable shelf 5, a pair of shelf locking holes 7 (a shelf locking hole of a desired height is selected) are formed in a predetermined shelf support 6. A pair of bent pivot pieces 8 are engaged with the base end 12 of the safety bar 11 (preferably rectangular in cross section).
The shaft member 9 and the nut 10 are connected by a threaded relationship. Note that the pair of pivot pieces 8 are
The safety bar 11 is tightened and fixed to the shelf support 6 by the shaft member 9 and the nut 10, but the safety bar 11 is pivoted vertically by the shaft member 9 between the pair of pivot pieces 8. supported.

Additionally, a pressing piece 13 is provided at the tip of the safety bar 11.
(made of a rubber material whose coefficient of static friction μ ₀ with respect to the steel shelf members is larger than that between the steel shelf members), and when the safety bar 11 is tipped sideways, the base end side shelf The length L from the support surface to the tip of the pressing piece 13 is the distance W between the opposing shelf supports 6 and 6A when the maximum passage width is formed.
It is designed to be longer than the

As shown in FIG. 1, when the pressing force P in the axial direction of the safety bar 11 acts on the shelf support 6A, the component force N acting perpendicularly to the surface of the shelf support 6A is expressed by the formula (1). The component force F in the direction along the surface of the shelf support 6A is expressed as
is expressed by equation (2), but when a force acts that causes the movable shelf 5 and the opposing movable shelf 5A to approach each other, the formula
The inclination angle θ of the safety bar 11 is set so that the relationship (3) is satisfied.
need to be set.

N=Pcosθ (1) F=Psinθ (2) μ ₀ N>F (3) From equations (1), (2), and (3), the relationship tanθ<μ ₀ can be obtained.

Also, since tanθ=√ ² − ² /W, √ ² −
The length L of the safety bar 11 must be set so as to satisfy the relationship W ² /W<μ ₀ .

Furthermore, a pair of clamping pieces 15 capable of clamping the opposing shelf support 6A from the left and right in a detachable manner are welded and fixed to the tip of the safety bar 11, avoiding the pressing piece 13.
In order to make it easier to insert and remove the plastic plate 1
5b is attached to the clamping piece 15.
The clamping portion has a protruding portion 15a protruding to one side, and when the safety bar 11 is pulled away from the opposing movable shelf 5A and placed in a vertical position, the pair of protruding portions 15
a holds the shelf support 6 that supports the safety bar 11,
The vertical position of the safety bar 11 is maintained (see FIG. 4).

This embodiment is constructed as described above, and when used, after forming the desired inter-shelf passage,
When a worker enters the passageway, disengages the clamping piece 15 from the shelf support 6, and tilts the safety bar 11 using the shaft member 9 as a fulcrum and falls it sideways, the safety bar 1
The tip pressing piece 13 of No. 1 comes into contact with the shelf support 6A of the opposing movable shelf 5A. At this time, the safety bar 11 is always in the forward upward tilting position and comes into contact with the shelf support 6A.

Therefore, even if a large earthquake occurs when the safety bar 11 is laid down as described above, the tip pressing piece 13 of the safety bar 11 will always be in contact with the opposing shelf support 6A, and the opposing shelf will be Coupled with the clamping action of the clamping piece 15 on the support column 6A, there is no possibility of missing the target.

Furthermore, the static friction coefficient μ ₀ and tan of the pressing piece 13
By setting the difference from θ (=√ ² − ² /W) to a relatively large value, the safety bar 11 can be used effectively by forming the inter-shelf passage with a predetermined width or more. . In practice, if the pressing piece 13 is made of a rubber material and the gentle inclination angle θ is set to 5 to 30 degrees, the range from the maximum passage width to the normally used passage width is sufficiently guaranteed, and the selection thereof is arbitrary. It is.

Thus, on the opposing movable shelves 5 and 5A,
Even if a lateral force acts, that force will be absorbed by the safety bar 11.
This ensures that the shelves 5 and 5A are prevented from coming close to each other and falling over.

In addition, as mentioned above, in order to avoid missing the target even in the event of a large earthquake, there is a phenomenon in which the opposing movable shelf 5A is hit by the safety bar 11, or
The situation where the stored articles are pushed down by the bar 11 does not occur, and it is extremely safe.

In addition, once the work is completed between the aisles, the safety bar 1
1 and stand vertically along the shelf support 6, or even if the movable shelf is not in use, the safety bar 11 of the open passageway can be laid down sideways, to achieve the above effect in the event of an earthquake. is demonstrated.

Furthermore, the number of safety bars 11 attached to each shelf may be arbitrarily selected depending on the length of the shelf, and as is clear from the above structure, the installation thereof is easy.

[Brief explanation of the drawing]

Fig. 1 is a side view of a movable shelf device equipped with a safety device according to an embodiment of the present invention, Fig. 2 is a side view of the main part of the safety device, and Fig. 3 is a partial cutaway along the - line in Fig. 2. The arrow view, FIG. 4 is an explanatory view corresponding to FIG. 2, showing the safety device in an unused state. 1... Base, 2... Guide rail, 3... Fixed shelf, 4... Wheels, 5... Moving shelf, 5A... Opposing moving shelf, 6... Shelf support, 6A... Opposing shelf support, 7 …
... Shelf locking hole, 8 ... Pivot piece, 9 ... Shaft member, 10
... Nut, 11 ... Safety bar, 12 ... Base end portion, 13 ... Pressing piece, 15 ... Clamping piece.

Claims (1)

[Scope of utility model registration request] In a movable shelf that can run on a track, the base end of a movement regulating member is pivotally attached to the shelf support so that it can swing freely in the vertical direction, and the tip of the movement regulating member has a coefficient of friction (μ
In addition to attaching a large pressing piece ₍₀ ), clamping pieces are provided to removably fit the shelf supports of the opposing shelves and the shelf supports supporting the movement regulating member from their left and right ^sides , ^and <μ ₀ (where W is the interval length between the shelf supports when the maximum passage width is formed) is satisfied, and when the passage is formed to the maximum passage width, the movement regulating member is at the base end. A safety device for a movable shelf, characterized in that the length L of the movement restricting member is set so that the pressing piece comes into contact with a shelf support of an opposing shelf in a posture gently tilted diagonally upward.