JP4485657B2 - Drawer locking mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking mechanism that prevents a drawer such as a cabinet from popping out due to a reaction caused by an impact during storage. Therefore, the present invention can be applied not only to a cabinet but also to a desk or the like having a drawer.
[0002]
[Prior art]
In office furniture that can store files or the like in a drawer, as represented by a cabinet, the drawer may be pushed too hard after it is pulled out. In this case, the drawer returns upon receiving a reaction force from the housing side at the storage end. If the drawer pops out in this way, it will be in the way and in some cases will cause the furniture to fall. Therefore, it must be pushed in again. A mechanism called a latch mechanism is provided in which the drawer in the housed state is locked to the housing side so that the housed drawer does not bounce back and jump out even during such shocking storage. This mechanism is configured so that a lever member provided on a handle on the front face of the drawer can be released by pulling together when the drawer is pulled out by placing the hand on the handle.
[0003]
[Problems to be solved by the invention]
However, the above-mentioned latch mechanism has a drawback in that the handle on the front surface of the drawer is provided with the lever member, so that there is a limitation in terms of design and design, and a free handle cannot be formed.
Therefore, an object of the present invention is to prevent the rebound of the drawer during shocking storage by a mechanism other than a system in which a lever is incorporated in the handle on the front of the drawer.
[0004]
In this application, with the cabinet etc. installed, the front side to pull out the drawer is the front side, the far side to store is the rear side, the higher one in the height direction of the housing is the upper side, the lower side is the lower side, the front side of the cabinet etc. Express the left hand side of the person who headed as the left side and the right hand side as the right side. Providing with respect to the drawer may be provided on the drawer itself or on a member attached to the drawer. Others are the same .
[0005]
In view of the above-described object, the present invention provides, in claim 1 , a pivot member that is provided for a moving member that moves in the same direction as the drawer by friction, and that is pivoted about the pivot axis and extends in the horizontal direction or the vertical direction. If the force is greater than a predetermined force, the stable state is maintained. When the center of gravity is rotated so as to move backward in response to the force greater than the predetermined force, the rearward rotation is performed by the moving member at a predetermined rotation position. A rotating member that is restricted and a rotating member that is provided for the housing for storing the drawer and is restricted to the predetermined rotating position at a position where the drawer is slightly advanced forward from the storage position. A drawer locking mechanism comprising: a locking portion that can be stopped is provided.
A rotating member that can rotate around the pivot extending in the left-right direction or the up-down direction is provided for the moving member that moves in the same direction as the drawer by friction. When received, the rotating member receives an inertial force greater than or equal to a predetermined force in the pushing direction (rear), and thereby rotates so that the stable state collapses and the center of gravity moves rearward. Is regulated in Furthermore, the drawer and the moving member move forward by rebounding, but the rotating member restricted by the moving member is locked by the locking portion provided for the housing, so that the moving member moves forward at that position. Is regulated. At this time, the drawer advances a little further according to the frictional force accompanying the sliding on the moving member, but stops immediately due to the sliding friction. In general, the drawer protrudes in this state, but if it is pushed in, the moving member is also retracted due to friction, the engagement between the rotating member and the locking portion is released, and the rotating member returns to a stable state. You can pull out the street.
[00 06 ]
According to a second aspect of the present invention, there is provided the drawer locking mechanism according to the first aspect , wherein a wheel provided with respect to the moving member is located within an operating range of the dropping mechanism in the somewhat advanced position. To do.
Even if the moving member tries to stop at the somewhat advanced position where the advancement of the moving member accompanying the rebound of the drawer is restricted, if the wheel at this position falls within the operating range of the dropping mechanism, The moving member automatically retracts and returns to the original storage position. In this case, the drawer is also retracted as the moving member is retracted due to friction. However, since the drawer slides forward with respect to the moving member and moves forward excessively during rebounding, it remains protruded by this extra forward movement, but this forward movement moves while receiving sliding friction instead of rolling friction. For small. Therefore, the furniture such as the cabinet can be prevented from falling.
[00 07 ]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 illustrates a cabinet to which a drawer locking mechanism according to the present invention is applied. Three drawers 14 can be stored in the housing 10 in three stages. A handle 16 is provided on the front surface of each drawer 14, and the drawer is pulled out by placing a hand on the drawer. However, the lever member of the latch mechanism is not provided on the handle 16 as in the conventional cabinet. A column 18 having a U-shaped cross section is fixed to the inner side surface of the left side plate 10S of the housing by extending in the vertical direction. In this support column, assemblies 20 to be described later are provided at a total of three locations corresponding to the respective drawers. On the other hand, on the left side plate 14S of each drawer, a drawer side assembly 40 is provided corresponding to the assembly 20 at each position. In this embodiment, the support post 18 'and the assembly are similarly arranged inside the right side plate 10S' of the housing, and the drawer side assembly is also provided on the right side plate 14S 'of each drawer. However, it may be applied to either the left or the right.
[00 08 ]
FIG. 2 shows an exploded view of the column 18 provided on the left side plate 10S, one assembly 20, and an exploded view of the drawer side assembly 40 corresponding thereto. The structure on the right side is the same. The upper end claw portion 22K of the base member 22 having a U-shaped cross section is inserted into the support hole 18H of the support and is fixed to the support with the screw B1. A pivot 24 is projected from the base member and extends in the left-right direction of the cabinet.
[00 09 ]
The rotating member 26 having a hole 26H inserted through the pivot 24 near the lower end and capable of freely rotating around the pivot is assembled in a state where the drawer is housed and the front of the cabinet. On the side, a front side wall portion 26B extending substantially upward is provided, and a rear side wall portion 26A extending substantially upward is also provided on the rear side. By these and the bottom surface 26T, a concave portion 26U whose upper and right sides are opened is provided. A compartment is formed. In addition, a claw-like rotating member side locking portion 26K is arranged at the upper end of the rear side wall portion so that the tip portion is slightly upward when the drawer is housed, but extends substantially rearward. Is formed.
[00 10 ]
As a rolling element, a spherical body 30 such as a metal having a large specific gravity is accommodated in the recess, and the outer frame member 28 is fixed to the base member with screws B2 from the right side. Further, the upper portion 28K of the outer frame member is bent in the direction of the base member, and the tip portion is inserted and locked into the hole 22H of the base member. The outer frame member seals the right opening and the upper opening of the above-described recess to prevent the sphere from dropping from the recess. The hole 28H receives and supports the end of the pivot. The front and rear wall portions of the rotating member are positioned so as to sandwich the upper portion 28K, and the rotating member has a center of gravity rearward until the front side wall portion 26B contacts the front side edge K2 of the outer frame member upper portion 28K. Further, the center of gravity can be rotated in the forward direction until the rear side wall portion 26A comes into contact with the rear side edge K1. Here, the center of gravity of the rotating member is higher than the pivot 24. Further, the center of gravity of the rotating member, which is combined with the sphere 30 in a state where the front side wall portion 26B thereof is in contact with the front side edge K2 of the upper portion 28K of the outer frame member 28, is located behind the vertical line L1 passing through the pivot 24. It is formed to do. Therefore, the rotating member 26 is stable in this state.
[00 11 ]
A drawer-side base member 42 having a U-shaped cross section and flange portions 42F and 42F 'formed on both sides thereof is fixed to the drawer left side plate 14S by screws B3 and B4 as shown in FIG. As shown in FIG. 3, when viewed from the front side of the cabinet, the U-shaped cross section is attached. Accordingly, the lower plate-like portion 44 forming a part of the U-shape extends in the front-rear direction, and an inclined portion 44K that is inclined forward is formed at the front end portion thereof. In addition, five holes 44H are formed in the lower plate-like portion 44 of the base member 42 at intervals of several millimeters, and the claw-like rotating member side locking of the rotating member is formed in each hole. The portion 26K can be engaged.
[00 12 ]
A rotation member 46 shown in FIG. 2 is disposed in an internal space region having a U-shaped cross section of the drawer-side base member 42. A pivot 48 is passed through the hole 46 </ b> H of the pivot member, an end of the pivot is inserted into the hole 42 </ b> H of the base member 42, and the pivot member 46 is configured to be rotatable around the pivot 48. In the assembled state, the pivot 48 extends in the left-right direction of the cabinet. In addition, on the front side of the cabinet of the rotating member 46 in a stationary state, a locking portion 46B extends diagonally forward and downward, and on the rear side, a leg portion 46A extends diagonally downward and downward, The front foot portion 46A ′ is in contact with the lower plate-like portion 44 and is stationary. That is, the rear part of the pivot 48 including the leg part 46A is configured to be heavier than the front part including the locking part 46B. Therefore, the foot portion 46A ′ is in contact with the lower plate-like portion 44 and is stable.
[00 13 ]
In the following, although FIG. 4 is referred to, when the drawer is pushed in the rearward direction R, the drawer is suddenly received at a predetermined storage position in the housing, and the drawer receives an impact, and tries to come out forward again. At this time, the rotation member 46 is rotated by the inertia so that the locking portion 46B and the leg portion 46A move rearward, the locking portion 46B enters the frontmost specific hole 44H, and the tip portion thereof is downward. Protruding. However, the backward rotation of the rotating member is restricted by contacting a part of the rear wall of the peripheral wall that defines the hole 44H. At this time, the drawer rebounds and moves forward, so that the rear wall of the specific hole 44H pushes the locking portion 46B of the rotation member 46 forward, and the casing-side rotation member in the above-described stable state. 26 is in contact with and engaged with the tip of the rotation member side locking portion 26K.
[00 14 ]
Thereafter, the forward momentum of the drawer causes the center of gravity of the casing side rotation member 26 to be pushed and moved forward, and the rear side wall portion 26A of the rotation member 26 is moved to the rear side edge K1 of the outer frame member 28. By abutting, the rotation of the housing side rotation member 26 and the forward movement of the drawer are restricted while the both locking portions 26K and 46B are engaged. In this restricted state, the drawer slightly protrudes forward, but after that, it may return to the storage position again due to reaction, and if there is a drop mechanism described later, it may automatically return to the storage position. it can. When the drawer returns to the storage position in this manner, the locking portion 46B is separated from the locking portion 26K, and the leg portion 46A is heavier than the locking portion 46B. The foot 46A ′ comes into contact with the lower plate-like portion 44 and is stabilized.
[00 15 ]
In the first reference embodiment described above, the mechanism is a combination of a mechanism that prevents the drawer from jumping out during an earthquake and a mechanism that prevents the drawer from rebounding when strongly pushed, which is the object of the present application. FIGS. 5 and 6 illustrate a mechanism that simplifies the configuration of the first reference embodiment and prevents only rebound when the drawer is pushed in strongly. Differences from the first reference embodiment will be described. First, on the drawer side, since the hole 44H ′ provided in the lower plate-like portion 44 ′ of the drawer side base member 42 ′ may be only a specific hole, the base member 42 ′ is formed short. On the other hand, on the housing side, a claw-like member 18K raised by notching the support column 18 is used as a locking portion.
[00 16 ]
Therefore, when the drawer is pushed in strongly, the rotation member 46 rotates as in the case of the first reference embodiment, and the locking portion 46B is a part of the peripheral wall that defines the hole 44H ′. Abuts against the rear wall of the part. In this state, the drawer rebounds and moves forward, and the locking portion 46B of the rotating member engages with the locking portion 18K of the claw-like member as shown in FIG. 6 to restrict the forward movement of the drawer. The Even if the drawing is stopped in this state, if this is pushed in again, the rotating member 46 becomes free, returns to the stable state shown in FIG. 5, and a normal drawing operation becomes possible.
[00 17 ]
Further, as schematically shown in FIG. 6, a general drawer drawer mechanism is provided with a moving rail member 50 that moves in the drawer moving direction, and a wheel 52 attached thereto is fixed to the housing side. It rolls and retreats along an inclined portion 54 that is formed on the fixed rail member 10 ′ that is lowered to the rear. This is called a drop mechanism. When the drawer is stored, even if the drawer is pushed incompletely, if the projection is small, the wheel is positioned on the inclined portion 54, and the wheel moves along the inclined portion 54 due to the weight of the drawer. By rolling back, the drawer can be kept in a fully retracted state. If this mechanism is provided, the drawer is locked as shown in FIG. 6 at the time of rebounding, and the protrusion is restricted, and then the drawer automatically retracts according to the retraction of the movable rail member 50 by the action of the dropping mechanism. And can naturally settle down. The same applies to the embodiments of the present invention described later.
Even if the moving rail member 50 is not provided and the wheel is directly attached to the drawer, the same operation is performed.
[00 18 ]
Below, with reference to FIGS. 7-9, the example which concerns on this invention is demonstrated. This is the case where the moving rail member 50 described in FIG. 6 moves in the same direction as the drawer moves. Corresponding to the moving rail member 50, a fixed rail member 10 ′ is fixed to the housing side and extends in the front-rear direction. A wheel 52 is mounted on the moving rail member 50, and the moving rail member 50 can move in the front-rear direction while the wheel rolls on the lower surface 10′D of the fixed rail member 10 ′.
[00 19 ]
The drawer 14 is placed on the wheel 52. When the drawer is pulled out, a frictional force is applied to the wheel 52 by the weight of the drawer, and this is rolled. As a result, the moving rail member 50 also moves in the same direction as the drawer. It is well known mechanistically that this moving speed is ½ of the moving speed of the drawer.
[00 20 ]
A pivot 48 extending in the left-right direction is provided at a predetermined rear portion of the moving rail member 50, and a pivot member 46 is rotatably mounted around the pivot 48. The rotating member 46 has the same structure as that of the first embodiment, and its legs are placed on the lower plate-like portion 56 of the moving rail member 50 and are stable. Further, the lower plate-like portion 56 has an opening hole, and when the rotating member 46 is rotated, the engaging portion can protrude downward from the opening hole.
[00 21 ]
On the other hand, at a predetermined position on the rear portion of the lower surface 10′D of the fixed rail member 10 ′, a locking portion 10′K formed by squeezing so as to push up from below the member 10 ′ is provided.
Accordingly, when the drawer is pushed in strongly, the moving rail member also moves so as to be pushed in the same direction, and the rearward movement is suddenly restricted at the storage position. Therefore, as with the case of the first embodiment, it is rotated by the inertial force. The moving member 46 rotates, and the locking portion comes into contact with the rear wall of a part of the peripheral wall that defines the opening hole. In this state, the drawer and the moving rail member are moved forward by rebounding, and the locking portion of the rotating member is engaged with the locking portion 10′K to restrict the forward movement of the moving rail member 50. . From this state, the drawer 14 moves further forward while sliding on the wheel 52, but stops immediately due to sliding friction.
[00 22 ]
Since the locking portion 10′K is provided at a position close to the pivot 48 provided on the moving rail member at the storage position, the rebound is immediately controlled and the drawer 14 can be stopped without a great advance. If the drawer at this position is pushed in, the moving rail member 10 'is also pushed in so that the rotating member 46 is free from the locking portion 10'K and returns to the stable state shown in FIG. It becomes.
[00 23 ]
【The invention's effect】
As is apparent from the above description, according to the present invention, it is possible to prevent the rebound of the drawer during shocking storage by a mechanism other than the system in which the lever is incorporated in the handle on the front surface of the drawer.
[Brief description of the drawings]
FIG. 1 is a perspective view of a cabinet having a locking mechanism according to the present invention.
FIG. 2 is an exploded explanatory view of the locking mechanism of FIG.
FIG. 3 is a view of the locking mechanism of FIG. 1 as viewed from the front side.
4 is an operation explanatory view of the locking mechanism of FIG. 1, and is a side view. FIG.
FIG. 5 is a side view of a locking mechanism of a second reference embodiment example.
6 is a view showing a state in which the locking mechanism of FIG. 5 is activated and locked. FIG.
FIG. 7 is a perspective view of a locking mechanism according to an embodiment of the present invention.
FIG. 8 is an enlarged side view of the main part of FIG. 7 in a stored state.
9 is a view showing a state in which the locking mechanism of FIG. 8 is operatively locked. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Case 14 Drawer 18K Locking part 26K Locking part 46 Rotating member 48 Axis 50 Moving rail member (moving member)
52 Wheel 54 Inclined portion of drop mechanism K1 Rear edge of upper part of outer frame member

Claims (2)

A pivot that is provided for a moving member that moves in the same direction as the drawer by friction and extends in the left-right or up-down direction;
It is mounted so as to be pivotable about the pivot, has a stable state as long as it does not receive a predetermined force or more, and is rotated so that the center of gravity moves rearward by receiving the predetermined force or more. A rotating member whose rearward rotation is restricted by the moving member;
A locking portion that is provided for a housing for storing the drawer, and that can lock the rotation member that is rearwardly restricted to the predetermined rotation position at a position where the drawer is slightly advanced forward from the storage position. A drawer locking mechanism comprising the drawer. 2. The drawer locking mechanism according to claim 1 , wherein a wheel provided with respect to the moving member is located within an operating range of the dropping mechanism at the slightly advanced position.

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