JPH07103738B2 - Simultaneous drawer withdrawal prevention device for filing cabinets, etc. - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing a plurality of drawers from being simultaneously drawn in a filing cabinet or the like.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 60-18105 discloses a typical structure of a filing cabinet or the like for preventing the risk of falling due to the forward movement of the center of gravity that occurs when a plurality of drawers are simultaneously drawn out. ing. this is,
When any one of the drawers is pulled out, the stop element that is raised in conjunction with it moves to the front side of the protrusion in the other drawer and makes these drawers undrawable.

However, in this arrangement, on its configuration, all of the plurality of drawers, Ri is possible der be drawn simultaneously, and by force majeure external force such as an earthquake, a plurality of drawers jump out at the same time, the cabinet the fall of
There is a risk to that.

As a device for eliminating such a drawback,
For example, as described in JP-A-2-241407,
For each drawer, a separate lock rod, actuating cam and actuation pin are provided, and when one drawer is pulled out, the other lock rod is restrained so that the other drawer cannot be pulled out.

[0005]

It is obvious that if a drawer preventing means is provided for each drawer, the structure will be complicated, the number of parts will be large, the manufacturing will take time and labor, and the cost will be high. is there.

[0006]

According to the present invention SUMMARY OF], the inner surface of the housing a plurality of drawers arranged in the upper and lower casings, provided with a locking rod of the vertically movable, the engagement body on the outer surface of each drawer is provided In addition, a number of driven blocks equal to the number of drawers, which have guide grooves in the front-rear direction and whose rear end is an introduction slope that widens up and down so that the engaging body can be fitted from the rear, are arranged vertically. The front end portion of the engaging body has a vertical pitch different from the vertical pitch of the united body.
Is the height included in the introduction slope of the rear end of the guide groove.
And so, by attached to the lock rod, also on the inner surface of the housing a plurality of drawers arranged in the upper and lower casings, in together when providing the locking rod of the vertically movable, on the outer surface of each drawer, The number of driven blocks corresponding to the number of drawers, which is provided with an engagement body whose front end is tapered in the up-down direction, and which has a guide groove in the front-rear direction, is the vertical pitch of the engagement bodies arranged in the up-down direction. Since the guide rod is attached to the lock rod with different pitches in the vertical direction and the rear edge of the guide groove is located in the tapered portion of the front end of the engaging body, the above-mentioned problem is solved. Will be resolved.

[0007]

[Operation] If you pull out one drawer ,
The engaging body that fits into the guide groove of the corresponding driven block moves the lock rod up and down. Therefore, other follower block becomes a height different from the engaging body in a corresponding drawer, such can be drawn other drawer Kunar.

Since only one engaging body can be fitted into the guide groove of the driven block at any one time, a plurality of drawers cannot be pulled out at the same time.

When the drawer is closed, the lock rod stops at that position. At this time, the engaging members of the drawers are
Since the height is included in the guide groove of the driven block, it can be fitted into the guide groove from the rear.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the illustrated embodiment, the present invention is applied to a filing cabinet provided with three vertically aligned drawers of the same shape and size.

(1) in FIG. 1 is a strip-shaped locking rod provided at a key portion on the inner side surface of the casing of a filing cabinet (not shown), and is vertically slid by a plurality of brackets (2). It is held as possible.

Each drawer (6) on the inner surface of the lock rod (1 )
When the substantially corresponding positions, longitudinal section forms the inward co shaped, or
One of the rear end of the guide groove facing the front and rear direction (3), introduction slope diverging vertically (4) and the three follower block (5) is fixed.

The driven blocks (5) (5) that are vertically adjacent to each other
Pitch (A) is equal to each other, the pitch (A) is a different size than the pitch (B) of the drawer (6) arranged vertically. This will be described further below.

At the same location on the outer surface of each drawer (6) ,
As shown in Fig. 1 and Fig. 2, the horizontal rod-shaped engaging body (7) is installed.
It is attached.

The engaging body (7) is fitted and fixed to a holding frame (8) fixed to the outer surface of the drawer (6) and having an inward U-shaped cross section facing in the front-rear direction and a front end opening of the holding frame (8). The cap (9)
The sliding frame (11) is fitted to the rear end of the holding frame (8) by a compression spring (10) to give a rearward projection output.

The upper and lower front surfaces of the cap (9) are slightly rounded and smoothly enter the guide groove (3) of the driven block (5) from the rear side to form the holding frame (8). Both can slide back and forth .

The outer surface of the front end portion of the sliding protrusion (11) should be
The facing protrusion (12) is provided, and the protrusion (12) is loosely fitted into the longitudinal hole (13) formed in the front and rear direction of the holding frame (8).
There is. As a result, the sliding protrusion (11) is retained in the front-rear direction . When the drawer (6) is fully closed in the housing,
The sliding rod (11) abuts the rear plate (14) of the housing and holds the holding frame.
Pull into (8).

Of the driven block (5) (5)pitch
(A) and the pitch (B) of the drawer (6) are not equal,
Also, even if the lock rod (1) moves up and down, each engagement body (7)
Always introduce the rear end of the guide groove (3) in the driven block (5)
It is set to be at the height included in the slope (4).

Depending on how much the drawer (6) is pulled out, the engaging body (7) can be made integral and the sliding projection (11) can be omitted.

Although not shown, the engaging body (7) is
By assuming that the front end is tapered in the vertical direction,
Introduction slope of the rear end of the guide groove (3) in the driven block (5)
(4) may have a small inclination or no inclination at all.

[0021]

Despite the extremely simple construction, only one drawer can be pulled out at any one time, which is safe.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention viewed from the inside front of a casing (not shown).

FIG. 2 is a perspective view of a main part of the drawer to which the engaging body in FIG. 1 is attached, as seen from the outside front side.

[Explanation of symbols]

 (1) Lock rod (2) Bracket (3) Guide groove (4) Introduction slope (5) Driven block (6) Drawer (7) Engagement body (8) Holding frame (9) Cap (10) Compression spring (11) ) Sliding rod (12) Protrusion (13) Long hole (14) Rear plate

Claims (2)

[Claims] The inner surface of the 1. A housing a plurality of drawers arranged in the upper and lower casings, provided with a locking rod of the vertically movable,
A number equal to the number of drawers that has an engaging body on the outer side surface of each drawer and has a guide groove in the front-rear direction that is an introduction slope with the rear end expanded upward and downward so that the engaging body can be fitted from the rear side. the follower block, the upper and lower sides of the engagement body arranged in the up and down
With a vertical pitch different from the vertical pitch, and
The front end of the engaging body is formed on the introduction slope of the rear end of the guide groove.
A device for preventing simultaneous withdrawal of drawers in a filing cabinet or the like , wherein the device is attached to the lock rod so as to have a height included therein . The inner surface of 2. A housing a plurality of drawers arranged in the upper and lower casings, in together when providing the locking rod of the vertically movable,
On the outer surface of each drawer, an engaging body having a front end that tapers in the up-down direction is provided, and a number of driven blocks corresponding to the number of drawers, which has a guide groove in the front-rear direction, are arranged in the up-down direction. Vertical pitch different from the vertical pitch of
With pitch, and the rear edge of the guide groove, the engaging body of so as to be positioned within the tapered front end, co drawer prevention device of drawers in filing cabinets or the like to be attached to the lock rod.