JP3980369B2 - Latch device for door in cabinet with flap door - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a latch device that locks a door in a cabinet with a flap door in a closed state.
[0002]
[Prior art]
A cabinet with a flap door is a door that opens and closes the front opening of a box-shaped cabinet body that opens on the front, with its lower end lifted forward and upward from a closed position that faces in the vertical direction. In many cases, the door is rotated backward and upward until it is almost horizontal, or is pushed backward to be accommodated so as to overlap the upper surface plate of the cabinet body. .
[0003]
This type of cabinet with a flap door is often used by being placed on the upper ends of a pair of left and right columns that are erected at the rear of a desk, or used as a hanging cabinet or the like.
[0004]
In a conventional cabinet with a flap door, a recess is formed in the center of the front lower part of the door, and a latch lever is provided there, and it is provided on both sides of the cabinet body on both sides of the cabinet body on the back of both sides of the door. There is provided a latch device in which a latch claw that engages with and disengages from the engagement hole is provided, and each latch claw and the latch lever are connected by a long rod that faces in the left-right direction.
[0005]
[Problems to be solved by the invention]
However, in the conventional latch device as described above, in addition to the latch lever, a pair of left and right latch claws and a long rod for connecting them are necessary, and the number of parts is large and the structure is complicated. In order for the left and right latch claws to be accurately interlocked with the latch lever and to operate correctly, care must be taken with respect to the deflection of the rod and door, displacement during connection, rod support accuracy, etc. Since a thick rod or the like is used to increase the weight, there is a problem such as an increase in weight.
[0006]
In view of the above-mentioned problems of the prior art, the present invention is simple in structure and assembly work, can operate accurately without being influenced by the material and rigidity of the door, and is downsized. An object of the present invention is to provide a door latch device in a cabinet with a flap door, which can be reduced in weight.
[0007]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) a door for opening and closing the front opening of the box-shaped cabinet body the front is open, from the closed position toward the vertical direction, in a flap door with cabinet to open by lifting the lower end to the upper front, cabinet body the front end lower surface of the bottom plate in the form a stepped portion which recessed upwardly, the engaging hole on the lower surface of the bottom plate of the step portion is provided, on the back bottom center of the door, after the finger receiving portion faces rearward and downward a latch lever provided upward of the latch pawl to the upper, together with the latch pawl engages before Symbol engaging hole, a locking position in which the majority of the finger receiving portion is adapted to fit within said stepped portion, The latch claw is pivotally attached to a release position where the latch claw is detached from the engagement hole, and biasing means for biasing the latch lever toward the locking position is provided on the door.
[0008]
(2) In the above item ( 1 ) , the latch lever is attached to the lower end of the support plate that is fixed to the back surface of the door and supports the cylinder lock.
[0009]
(3) In the above item ( 2 ) , an engagement hole is also provided on the front center upper surface of the bottom plate above the engagement hole with which the latch claw is engaged and disengaged. The key plate that can be moved to the locking position and the unlocking position is engaged and disengaged.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a pair of left and right columns (4) in which two cabinets (1) and (1) with flap doors to which the present invention is applied are erected at the rear end of a top plate (3) in a desk (2). An example is shown in which the upper and lower support plates (5) are arranged side by side on the left and right.
[0011]
As shown in FIG. 2, each cabinet (1) includes a box-shaped cabinet main body (hereinafter simply referred to as a main body) (6) having an open front surface, and a door ( 7), as shown by the solid line in the figure, from the closed position where the entire opening is completely closed in the up-down direction, by pushing the lower end forward or upward while pushing it backward, As indicated by an imaginary line in the figure, on the upper side of the main body (6), the pivoting arm (8) is such that the front end projects slightly forward from the main body (6) and opens to a fully open position that is substantially horizontal. It is mounted so as to be opened and closed by door guide means (9) including The door (7) which moves in this way is generally called a flap door.
[0012]
Since the door guide means (9) is well known and is not directly related to the present invention, its detailed description is omitted.
[0013]
As shown in FIG. 3, the door (7) is made of an extruded product of a semi-transparent synthetic resin material. In the side view, the door (7) is a surface plate (10 ) And a vertical back plate (11) with a plurality of horizontal ribs (12) parallel to each other at an appropriate interval in the vertical direction. (13) is a top plate and (14) is a bottom plate.
[0014]
The left and right ridges (15) projecting in a mountain shape toward the front are formed at the lower end of the front plate (10), and the left and right ridges are recessed toward the front at the lower end of the back plate (11). Recesses (16) are respectively provided.
[0015]
The insertion portions (18) of the end cap (17) are fitted to the left and right ends of the door (7), and both ends of the door (7) are closed by the end cap (17).
[0016]
As shown in FIGS. 4 to 6, the portion between the lowermost rib (12) and the second lowest rib (12) at the center in the left-right direction of the back plate (11) of the door (7). Is formed with a rectangular insertion hole (19), thereby forming a recessed portion (20) extending from the rear to the surface plate (11) at the lower center of the back surface of the door (7).
[0017]
In addition, a circular window hole (21) is formed in the lower center portion of the surface plate (11) corresponding to the recessed portion (20) so that a front end surface of a cylinder lock (22) described later is exposed. Yes.
[0018]
A support plate (23) that supports the cylinder lock (22) is fitted and fixed to the recess (20).
[0019]
The support plate (23) has a U-shaped convex bent part (24) protruding forward at the middle part, and a mounting flange (25) (26) facing upward and downward is connected to the rear edge. It is made of a metal plate, and the convex bent portion (24) is fitted into the recessed portion (20), and the upper and lower mounting flanges (25), (26) are placed in the second step from the bottom of the back plate (11). At a position close to each rib (12) above the rib (12) and below the lowermost rib (12), it is fixed to the back plate (11) with a set screw (27).
[0020]
The front end surface (24a) of the convex bent portion (24) is provided with a vertically long oval lock mounting hole (28) projecting into the lock mounting hole (28) of the cylinder lock (22). In the state where the main body (22a) is fitted from the front and the enlarged diameter flange part (29) formed at the front end of the main body (22a) is in contact with the front end surface (24a), the enlarged diameter flange part (29) From the leaf spring in which the front shape is almost U-shaped and the flat shape is corrugated in the left and right cut grooves (30) (30) formed in the upper and lower parts of the main body (22a) slightly rearward The cylinder lock (22) is attached to the convex bent portion (24) of the support plate (23) by fitting the retaining member (31).
[0021]
The cylinder lock (22) is inserted into the key hole (22b) (see FIG. 6) formed in the center of the front end surface, and the key (32) (see FIG. 4) is inserted into the main body (22a) together with the key (32). By rotating the rotor (not shown), the key plate (33) mounted on the rear part of the main body (22a) so as to be movable up and down is similarly imaginary to the locking position which is the lower limit position shown by the solid line in FIG. It is possible to move to the unlocking position which is the upper limit position indicated by.
[0022]
The cylinder lock (22) has a front end face with a key hole (22b) when the support plate (23) is screwed to the back plate (11) as described above. (21) is adapted to be fitted into the recessed portion (20) together with the convex bent portion (24) of the support plate (23) so as to be exposed inside.
[0023]
The key plate (33) is bent in a step shape with its lower half facing backward, and the lower end of the key plate (34) is the top of the bottom plate (34) formed in a hollow plate shape in the main body (6) when locked. Engage with a horizontally long engagement hole (35) drilled in the front center of the wall (34a) to prevent the lower end of the door (7) from moving forward, The lower end is disengaged above the engagement hole (35) to allow the lower end of the door (7) to move forward.
[0024]
A guide hole (36) in which the upper end (24b) of the convex bent portion (24) of the support plate (23) is fitted to the upper end of the key plate (33) when in the unlocked position. However, the intermediate step of the key plate (33) when locked is fitted to the corner of the convex part (24) between the lower piece (24c) and the lower mounting flange (26). The guide holes (37) adapted to be formed are respectively drilled.
[0025]
On both sides of the lower end of the lower mounting flange (26), a pair of left and right bearing pieces (38) projecting forward so as to fit into a recess (16) in the lower back of the door (7). 38) is continuously provided, and the latch lever (40) is pivotally attached to the lower part of the support plate (23) with the pivot shaft (39) facing the left and right direction pivotally supported by both bearing pieces (38) (38). ing.
[0026]
The latch lever (40) has an S-shaped handle (42) in a side view as viewed from the side and facing downward again after facing downward from the cylindrical portion (41) through which the pivot (39) is inserted. ing.
In the rear upper part of the handle (42), an engagement hole (in the center of the front end of the lower wall (34b) of the bottom plate (34) and directly below the engagement hole (35) ( 43) and the latch claw (44) is engaged with the engagement hole (43) on the upper surface of the intermediate step portion of the handle (42) . A stopper (45) is provided for contacting the front surface of the lower end of the mounting flange (26) below the support plate (23) and preventing the latch lever (40) from rotating further counterclockwise in FIG. It has been.
[0027]
The latch lever (40) is urged counterclockwise in FIG. 4 by a torsion coil spring (46) which is an urging means provided around the pivot (39), and the stopper (45) is normally attached. Although it is in contact with the front surface of the lower end portion of the flange (26) and the latch claw (44) is engaged with the engagement hole (43) as shown in FIG. 4, the torsion coil spring (46) By pulling the handle (42) forward against the urging force, the latch claw (44) can be rotated to the release position where it is disengaged from the engagement hole (43).
[0028]
At this time, the latch release operation direction in which the lower end portion of the latch lever (40) is pulled forward and the door opening direction in which the lower end of the door (7) is rotated forward are the same. It can be performed continuously and smoothly by natural movement with one hand.
[0029]
When the key plate (33) is in the locking position and the latch lever (40) is in the locking position, the key holes (35) and (43) in the bottom plate (34) are aligned with the key holes (35) and (43). The lower end portion of the plate (33) and the latch claw (44) are engaged from above and below, and the lower end portion of the door (7) can be strongly prevented from opening forward.
[0030]
On the lower surface of the front end portion of the bottom plate (34), a step portion (47) that is recessed upward is formed.In this step portion (47), the latch claw (44) of the latch lever (40) and the handle portion ( By fitting most of 42), most of the latch lever (40) is hidden behind the lower end of the door (7), and the appearance can be improved.
[0031]
At the upper end of the upper mounting flange (25) of the support plate (23), a rearward projecting piece (48) is continuously provided, and the projecting piece (48) has a horizontally long locking hole (49). Is drilled.
[0032]
In addition, horizontally long locking holes (50) are formed in both side portions of the lower mounting flange (26).
[0033]
The front surface covering almost the entire rear surface of the support plate (23) excluding the recessed portion (20) on the back surface of the door (7) and the lower end portion of the support plate (23) and the lower end portion of the key plate (33) opens. The thin box-shaped cover (51) has a locking claw (53) projecting from the lower surface of the upper wall (52) engaged with the rear edge of the engagement hole (49) and the bottom wall (54). A pair of left and right projecting pieces (55) (55) connected to the front edge of the front edge are inserted into the recess (16) on the back surface of the door (7) through the locking holes (50) (50). The engaging claw (56) projecting from the upper surface of each protruding piece (55) is detachably attached to the support plate (23) by engaging the front surface of the upper edge of the engaging hole (50). Yes.
[0034]
The cover (51) is preferably formed of a translucent synthetic resin material.
[0035]
In this embodiment, the cylinder lock (22) and the latch lever (40) are mounted in advance on the support plate (23), and in this state, the support plate (23) is screwed to the back surface of the door (7). By doing so, the cylinder lock (22) and the latch lever (40) can be easily and firmly attached to the thin hollow plate door (7) made of synthetic resin.
In the above-described embodiment, the plurality of ribs (12) in the door (7) are all directed in the left-right direction. However, these are, for example, directed in the up-down direction or other directions, or latticed. It can also be in a shape.
[0036]
【The invention's effect】
According to the invention of claim 1, since the latch lever and the latch claw are integrated and provided at the lower center of the back surface of the door, there is no need to connect the latch lever and the latch claw with a rod or the like as in the prior art. The structure and the assembling work are simple, and the door can always be accurately locked or unlocked without being influenced by the material or rigidity of the door.
Further, the entire latch device can be reduced in size and weight, and in particular, the number of parts can be greatly reduced as compared with the conventional one.
[0037]
Further, most of the latch lever can be accommodated in the step formed on the lower surface of the front end portion of the bottom plate, and the appearance of the latch lever can be improved by making the latch lever inconspicuous from the front.
In particular, the provision of the stepped portion makes it difficult to see the engagement portion between the latch claw and the engagement hole from the outside, and the appearance is good.
[0038]
According to the invention described in claim 2 , since the latch lever and the cylinder lock can be mounted on the same support plate and attached to the door, not only the mounting operation is simplified, but also the latch lever and the cylinder lock The misalignment of each other is reduced, and the mounting accuracy can be increased.
[0039]
According to the third aspect of the present invention, when the door is closed and locked, the key plate and the latch claw are engaged with the engagement holes from the upper and lower sides of the front center of the bottom plate, thereby reliably preventing the door from opening. In particular, even when the door is twisted, the key plate and the latch claw are not detached from the engaging hole, and the reliability of the latch and locking can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which two cabinets with flap doors including an embodiment of the present invention are arranged at the upper rear of a desk.
FIG. 2 is also a partially cutaway side view of the cabinet.
FIG. 3 is an enlarged exploded perspective view of the right end portion of the door, similarly;
4 is an enlarged central longitudinal side view of the lower part of the cabinet. FIG.
FIG. 5 is a perspective view of the lower center of the door as seen obliquely from the lower rear with the rear cover removed.
FIG. 6 is a front view of a support plate equipped with a cylinder lock and a latch lever.
[Explanation of symbols]
(1) Cabinet
(2) Desk
(3) Top plate
(4) Prop
(5) Support plate
(6) Cabinet body (main body)
(7) Door (Flap door)
(8) Rotating arm
(9) Door guide means
(10) Surface plate
(11) Back plate
(12) Rib
(13) Top plate
(14) Bottom plate
(15) ridge
(16) Concave
(17) End cap
(18) Insertion section
(19) Insertion hole
(20) Recess
(21) Window hole
(22) Cylinder lock
(22a) Body
(22b) Keyhole
(23) Support plate
(24) Convex bent part
(24a) Front end face
(24b) Upper piece
(24c) Lower piece
(25) (26) Mounting flange
(27) Set screw
(28) Lock mounting hole
(29) Expanded collar
(30) Cut groove
(31) Retaining member
(32) key
(33) Key plate
(34) Bottom plate
(34a) Upper wall
(34b) Lower wall
(35) Engagement hole
(36) (37) Guide hole
(38) Bearing piece
(39) Axis
(40) Latch lever
(41) Tube part
(42) Handle
(43) Engagement hole
(44) Latch claw
(45) Stopper
(46) Torsion coil spring (biasing means)
(47) Step
(48) Projection
(49) (50) Locking hole
(51) Cover
(52) Upper wall
(53) Locking claw
(54) Bottom wall
(55) Projection
(56) Locking claw

Claims (3)

In the cabinet with a flap door that opens the door that opens and closes the front opening in the box-shaped cabinet body with the front opening from the closed position facing the vertical direction by lifting the lower end forward and upward,
A stepped portion that is recessed upward is formed on the lower surface of the front end of the bottom plate in the cabinet body, and an engagement hole is provided in the lower surface of the bottom plate in this stepped portion , and a handle portion that faces rearward and downward in the lower center of the rear surface of the door. locked position the latch lever provided upward of the latch pawl to the upper, together with the latch pawl engages before Symbol engaging hole, a large part of the finger receiving portion is adapted to fit within the stepped portion after the And the latch pawl is pivotally attached to a release position where it is detached from the engagement hole, and the door is provided with a biasing means for biasing the latch lever toward the locking position. A door latch device in a cabinet with a flap door. The latch lever is secured to the back surface of the door, and the door latch apparatus in a flap door with the cabinet of claim 1, wherein mounted on the lower end of the support plate supporting the cylinder lock. An engagement hole is also provided on the top center upper surface of the bottom plate above the engagement hole where the latch claw is engaged and disengaged, and the upper engagement hole is moved to the locked position and the unlocked position by operating the cylinder lock. The door latch device in the cabinet with a flap door according to claim 2, wherein the key plate is engaged and disengaged.

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