JPH07103740B2 - 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 one of the drawers is pulled out, the stop element that is moved up in conjunction with it moves to the front side of the protrusion in the other drawer, thereby making it impossible to pull out these drawers.

However, in such a structure, it is possible to simultaneously draw out a plurality of drawers due to its structure. Therefore, there is a risk that a plurality of drawers will start to move out at the same time due to an external force such as an earthquake and the cabinet will fall.

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 the provision of the drawer preventing means for each drawer complicates the structure, increases the number of parts, requires time and labor for manufacturing, and is expensive. .

[0006]

According to the present invention, the above-mentioned section
The subject is the vertical lock rod and free rod that can be moved up and down , each having a driven protrusion and a stop protrusion , at the position corresponding to each drawer, on the inner surface of the housing that houses a plurality of drawers lined up and down. A guide slope that is arranged side by side, and contacts the lower surface of the rear side of the driven protrusion when the drawer is pulled out, and raises the lock rod together with the driven protrusion, A guide member having a vertical gap that can pass through the stop protrusion of the free rod is provided, and when one of the gaps of the guide member is flush with one of the stop protrusions of the free rod, the other vertical The gaps in the direction and the corresponding stop protrusions have different heights, and the mounting position of each stop protrusion to the free rod is determined so that the stop protrusions do not pass through.
To be achieved. In addition, a vertically movable vertical lock rod and free rod are arranged front and back on the inner surface of the housing that accommodates a plurality of drawers arranged vertically, and a driven protrusion is provided at a position corresponding to each drawer in the lock rod. A stop projection having a guide groove facing the front-rear direction is provided at a position corresponding to each drawer in the free rod, and each side surface of each drawer has a rear lower surface of the driven protrusion when it is pulled out. A guide slope that abuts on the driven rod and raises the lock rod together with the driven protrusion, and an engagement protrusion that can pass through the guide groove of the stop protrusion of the free rod. When one of the guide grooves is at the same height as one of the engaging protrusions, the other guide groove has a different height from the corresponding engaging protrusion and prevents the engaging protrusion from passing. The free rod of each stop protrusion as Also it by the fact that defines the mounting position, the problem is solved.

[0007]

When any one of the drawers is pulled out, the guide rod in the drawer raises the lock rod through the driven protrusion, and the vertical gap provided in the drawer or the engaging protrusion is It moves forward through the corresponding stop protrusion or guide groove provided on the free rod.

At the time of this passage, the free rod is moved up and down, and the heights of the corresponding vertical gaps or engaging protrusions in other drawers are made different from the heights of the stop protrusions or guide grooves in the free rod. Block passage.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment is one in which the present invention is applied to a filing cabinet having three drawers of the same shape and size.

(1) in FIG. 1 is a strip plate-shaped vertical lock rod provided in a key portion on the inner side surface of the casing of a filing cabinet (not shown), and by the upper and lower brackets (2) and (2),
It is held so that it can slide in the vertical direction. The upper end of the locking lever (1), upward arrow-shaped engagement protrusion (3) is collision set, the lock lever (1) is raised a certain amount, the engagement projecting pieces (3)
Is adapted to be grasped and held by being fitted into an elastic clamp (4) provided downward on the upper part of the housing.

[0011] the corresponding positions with each drawer in the inner side surface of the lock lever (1) is three driven projections facing inwardly (5),
It is fixed with the same pitch (B) as the drawer .

Immediately after the lock rod (1) (on the right side in FIG. 1) , a strip-shaped vertical free rod (6) is formed on the inner surface of the housing.
Is guided by upper and lower receiving metal fittings (7) and (7) so as to be movable up and down.

[0013] Also on the inner side surface of the free lever (6), the three stop projections located at a height corresponding to each drawer (8), are projected toward inwardly. Pin stop projections (8) (8) arranged vertically
The switch (A) is different from the pitch (B) of the driven protrusions (5) (5). This will be described further below.

[0014] outer side of the drawer, the guide member (17) is taken
It is attached.

As shown in FIG. 2, the guide member (17) is a positive member.
No surface view outward co shaped, setting an upward chevron protrusion (13) at the front end of the rear end to the downward angled projections of the upper piece (10) to (11), also the lower strip (12)
Only, and the middle portion in the height direction, the orientation in the longitudinal direction, Rutotomoni provided loose downward oblique piece to the front end (14), a rear end, slightly larger gap than the vertical dimension of the stop projection (8) With (C), the up-facing chevron protrusion (1) facing the down-facing chevron protrusion (11).
With a horizontal middle piece (16) with 5) , drawer (9)
It is fixed to the rear of the side of the .

The mounting position of each guide member (17) with respect to the drawer (9) is as shown in FIG. 1 when the drawer (9) is pushed in .
As described above, the guide slope on the front surface of the upward mountain-shaped protrusion (13) at the front end of the lower piece (12) is set to come immediately after the driven protrusion (5) of the lock rod (1) in the lowered position.

Therefore, when one of the drawers (9), for example, the topmost drawer (9) is slightly pulled out, the driven protrusion (5)
Is pushed up by the upward chevron projections (13) at the front end of the lower piece (12) of the guide member (17), and the lock rod (1) rises and is held by the elastic clamp (4).

When the drawer (9) is further pulled out in this state, the uppermost stop protrusion (8) on the free rod (6) is pulled out.
1, is guided by the upward chevron projection (15) at the rear end of the middle piece (16), and the upper edge of the upward chevron projection (15) ,
Between the lower edge of the downward chevron (11) at the rear end of the upper piece (10)
Relatively passes through the gap (C).

[0019] Thus this time, two stop projections under side (8) is the same rear end of the upward angled projections (15 middle piece of the guide member (17) in the corresponding drawer (9) (16) ) Front slope,
Or before slopes downward angled projection (11) of the rear end of the upper piece (10) This
In so that the Sessu, pitch stop projections (8) (8) (A ) is determined.

In other words, the stop projection (8)(8) pitch
(A) is a drawer lined up and down (9)(9)Guide member
(17)Pitch between the centers of the gap (C) and (C) in (17)When
Are different.

3 and 4 show different embodiments, the same members as those in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted.

[0022] On the inner side surface strategic points of the free lever (6), forms a longitudinal sectional inward co shaped, the rear end of the guide groove (18) facing the longitudinal direction formed in the upper and lower direction of the intermediate, upper and lower Expanding slope (19)
The stop projection (20), which follows the (19) , is fixed.

The pitch of the upper and lower stop protrusions (20) (20) is
Pitch of the guide members (22), (22) of, and therefore the lock rod (1)
It is different from the pitch of the driven stems (5) and (5) in FIG .
This will be described later.

As shown in FIG. 4, the drawer (9) The <br/> rear end of the outer side of the direction outward, and engagement projections which can fit into the guide grooves (18) (21) but also in its slightly forward, <br/> guide member facing away (22) it is fixed.

The guide member (22) forms a longitudinal section outward U-shaped, the lower surface the front end of the upper piece (23) is provided with a downward slope (24),
Moreover, the lower piece (25) is provided with an upward angled protrusion (26) facing the downward slope (24) with a gap slightly larger than the vertical dimension of the driven protrusion (5).

Guide grooves (1) of the stop protrusions (20) (20) that are vertically adjacent to each other
The pitch between 8) and (18) is different from the pitch between the engaging protrusions (21) (21) in the drawers (9) arranged vertically, and one of the engaging protrusions (21) is When it comes to a position where it can be fitted into the guide groove (18) of the stop projection (20), all the other engaging projections (21) are brought into contact with the rear surface of the stop projection (20) and locked. is there.

[0027]

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 a first embodiment of the present invention as seen from the inside front of a casing (not shown).

FIG. 2 is a perspective view showing a guide member attached to the outer side surface of the drawer.

FIG. 3 is a view similar to FIG. 1 showing a second embodiment of the present invention.

FIG. 4 is a perspective view showing an engagement protrusion and a guide member attached to the outer surface of the drawer.

[Explanation of symbols]

 (1) Lock rod (2) Bracket (3) Engagement protrusion (4) Elastic clamp (5) Follower bar (6) Free rod (7) Bracket (8) Stop protrusion (9) Drawer (10) Upper piece (11) Downward chevron protrusion (12) Lower piece (13) Upward chevron protrusion (14) Downward slanting piece (15) Upward chevron protrusion (16) Middle piece (17) Guide member (18) Guide groove (19) Slope (20) Stop protrusion (21) Engagement protrusion (22) Guide member (23) Upper piece (24) Downward slope (25) Lower piece (26) Upward chevron protrusion

Claims (2)

[Claims] 1. A vertically movable lock rod and a free rod , each of which has a driven protrusion and a stop protrusion , are provided at a position corresponding to each drawer on an inner surface of a housing that accommodates a plurality of drawers arranged vertically. , A guide slope that is provided side by side in front and behind, and when the drawer is pulled out, it comes into contact with the rear lower surface of the driven protrusion and raises the lock rod together with the driven protrusion. And a guide member having a vertical gap that can pass through the stop projection of the free rod, and between the gaps in the upper and lower guide members.
By making the pitch different from the pitch between the stop protrusions
Therefore, when one of the gaps in the guide member is at the same height as one of the stop protrusions of the free rod, the other vertical gaps and the corresponding stop protrusions have different heights and pass through the stop protrusions. The simultaneous pull-out prevention device for drawers in a filing cabinet or the like, characterized in that the mounting position of each stop projection with respect to the free rod is determined so as not to prevent it. 2. A vertically movable vertical lock rod and a free rod are provided side by side on the inner side surface of a housing accommodating a plurality of drawers arranged vertically, and at positions corresponding to the drawers of the lock rod. Is provided with a driven protrusion, and a stop projection having a guide groove facing the front-rear direction is provided at a position corresponding to each drawer in the free rod, and the driven protrusion is provided on each side surface of each drawer when it is pulled out. in contact with the rear lower face of Rutotomo provided with inclined guide surfaces that are adapted to raise the locking rod with the driven projections, the engaging projections which can pass through the guide groove of the stop projection in the free rod
The pitch of the upper and lower stop protrusions to the upper and lower guide members.
When one of the guide grooves of the stop projection has the same height as one of the engaging protrusions, the other guide groove has a height different from that of the corresponding engaging protrusion. A device for preventing simultaneous withdrawal of drawers in a filing cabinet or the like is characterized in that mounting positions of the respective stop projections with respect to the free rod are determined so as to prevent passage of the engaging protrusions.