JPH0826718B2 - Latch mechanism of drawer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present application relates to a drawer latch mechanism in a filing cabinet or the like.

2. Description of the Related Art Conventionally, in a drawer in a filing cabinet or the like, a latch mechanism for fixing the drawer to the cabinet in a housed state so that the drawer does not unexpectedly pop out due to an external vibration such as an earthquake is disclosed in, for example, Japanese Utility Model Publication No. The configuration is known in Japanese Patent Publication No. JP-A-2003-242, and the configuration is such that an operating portion is provided at one end of a horizontal rotating rod that is rotated by tilting of an operating member arranged in a pulling member, and the operating portion is provided at the upper end. A latch lever is pivotally supported at the lower end of a vertical driven rod having an abutting portion that abuts against the holding lever attached to the back plate that constitutes the front part of the drawer, and is always in one direction. It is elastically biased and held so that it can rotate horizontally, and the latch lever projects to the back side of the back plate and is locked by a latch stopper. This locked state is tilted by operating the operating member to drive the driven rod. Those configured to release and rotate.

However, according to the above-described conventional configuration, the holding member is fixed to the back plate that forms the front portion of the drawer with a screw, and the latch lever is unidirectionally attached. Since the spring for biasing the elastic force is arranged between the latch lever and the drawer container, the work of attaching the holding frame to the back plate and the work of attaching the spring are troublesome, and
If the spring is likely to come off during use and the drawer has a deep structure, a long driven rod will be used accordingly.However, when using a long driven rod, its rotating action will be smooth. Therefore, there is a structural inconvenience that a support means for supporting the upper position of the driven rod must be provided separately.

In order to solve the problem, therefore, the present application configures the holding member from a rectangular frame body having an opening on the front surface, and uses this holding member horizontally when the drawer is shallow and vertically when the drawer is deep. By attaching the back plate to the back plate, the above-mentioned defects of the conventional one are improved.

That is, the present application is a vertical structure in which an operating portion is provided at one end of a horizontal rotating rod that is rotated by tilting of an operating member arranged in a pulling member, and an abutting portion that abuts the operating portion is provided at an upper end. The base of the latch lever is pivotally supported on the lower end of the rod-like driven rod, and the latch lever is horizontally supported by a holding member attached to the back plate that constitutes the front part of the drawer in a state in which the latch lever is always biased in one direction. While holding it rotatably, the latch lever is projected from the mounting hole provided on the back side of the back plate and locked to the latch stopper, and this locked state is rotated by tilting the operating member to rotate the driven rod. In the drawer latch mechanism configured to be released by the above, in the interval between the upper and lower edges of the mounting hole,
The left and right edges are formed to have the same interval, while the holding member is formed of a rectangular housing having an opening on the front surface and an inner width in the lateral direction having a width in which the latch lever can intervene.
A locking rib that is bent outward in an L-shape and locks on one of the opposite edges of the mounting hole is provided on the front surface of the one long side.
Further, on the front surface of the other long side, a pair of parallel cut lines is provided so as to be elastic so as to retain elasticity, and at the end portion, a protruding portion that engages with the other opposite edge portion of the mounting hole is provided outward. Locking pieces are provided respectively, and further in the longitudinal direction of the holding member,
At the position in the lateral direction where the locking rib and the locking piece are provided,
It is characterized in that insertion holes for inserting the driven rods are formed respectively, and preferably, in the above, the locking ribs and the locking pieces are provided at the end positions in the longitudinal direction of the holding member, and the holding member. The base of the latch lever and the spring for elastically biasing the latch lever in one direction are interposed inside the upper part of the base of the latch lever so that the latch lever and the spring can be easily assembled in the holding member. A shaft portion projecting to the side, and the winding portion of a spring having a winding portion at the center is fitted to the shaft portion, and both pieces of the spring are opposed to the side surface of the latch lever. The base portion is inserted into the holding member so as to be interposed between the holding member and the inner surface of the holding member.

Therefore, the base of the latch lever and the spring are intervened in the holding member, and the lower end of the driven rod is pivotally supported by the base of the latch lever through the insertion hole. When attaching to the mounting hole opened in, first lock the locking rib to one of the opposite edges of the mounting hole,
Next, using the elasticity held in the locking piece, the locking receiving part,
By pushing and locking the other edge of the mounting hole facing each other, the front surface of the holding member is brought into contact with the front surface of the back plate, and thus the holding member is attached to the back plate and the latch lever is biased. The contact portion of the driven rod comes into pressure contact with the operating portion of the rotating rod by the elastic force of the spring.

In the normal state, one of the latch levers, which is urged to rotate, engages with a latch stopper provided on the inner surface of the cabinet, and the drawer is latched by the cabinet.

In the above, when the drawer is deep and the long driven rod is used with it, the holding member is attached vertically, and when the drawer is shallow and the short driven rod is used, the holding member is It is installed horizontally.

Example Hereinafter, based on the drawings, an example of the present application will be described in detail.
The drawer (1) has a back plate (3) vertically provided on the front surface of the container (2), and a front plate (4) attached to the front surface thereof, and the center of the front plate (4). At the position, there is provided a handle mouth portion (6) having an inward rib (5) on the periphery.

The back plate (3) is bent at the upper edge and the left and right side edges, respectively, and is bent forward to project horizontally, and a collar piece (8) having a step portion (7) along an intermediate position of the projecting length. ), And the lower edge is also integrally provided with a collar piece (10) which horizontally projects and has a downwardly projecting ridge (9) along an intermediate position of the protruding length.

The front surface plate (4) is bent to the upper edge and the left and right side edges, respectively, and then bent rearward to horizontally project, and engages with the stepped portion (7) of the brim piece (8) along the leading edge thereof. Cover piece (12) that overlaps with the flange piece (8) having a downward engaging piece (11)
Similarly, the lower edge is also bent backward and protrudes horizontally to form an upward projecting ridge (13) along the intermediate position of the projecting length. ) Position,
Mounting pieces (14) fixed to the collar pieces (10) are integrally provided. The pulling member (15) has a bottom plate, a back plate, and left and right side plates, and a horizontal crosspiece (16) having a paragraph (16) 'formed at the bottom between the upper front edges of the left and right side plates. Of the frame body (17), a paragraph (18) provided along the front edge of the bottom plate of the frame body (17) along a part of the front edges of the left and right side plates, and provided upright on the upper surface of one side plate. , The pivoting rod (30) described later
One bearing portion (20) having a lateral hole for rotatably supporting one end of the other end and the other bearing member provided on the upper surface of the other side plate and rotatably supported by being clamped from the front of a turning rod (30) described later. The bearing part (21) and the outer surface of one of the side plates are provided near the rear surface,
It is composed of a mounting portion (23) having one mounting hole (22), and the pulling member (15) thus structured has a horizontal projection on the outer surface of the other side plate. Front 2
The guide grooves (24) and (24) 'that open in the vertical direction are separated from the front surface by facing a pair of hanging pieces at the location, and the other end has a mounting hole (25). Guide member (2
6) is integrally provided and these are integrally molded with synthetic resin.

Operation member (27) interposed in the pull member (15)
Is a vertically long fitting hole (28) with an open front,
The lower part is made of a horizontally long synthetic resin plate integrally formed with an inclined part (29) that tilts forward, and the rotating rod (30) is bent at a right angle to one end of the long horizontal part (31). 2 has a short operating part (32) which is provided in a part of the horizontal part (31).
The V-shaped bent portions (33) and (33) are formed, and the pulling member (15) configured as described above and the operating member (2
7) and the rotating rod (30) are first arranged in the fitting hole portion (28) of the operating member (27) from the front surface thereof to the horizontal portion (3) of the rotating rod (30).
The positions of the bent portions (33) and (33) of 1) are press-fitted to support the operating member (27) on the rotating rod (30), and then the operating member (2).
Rotating rod (30) so that 7) intervenes in the frame (17).
The horizontal part (31) of the above is rotatably supported by the left and right bearing parts (20) and (21) respectively, and the actuating part (32) is rotated the previous time when the drawer (1) has a wide width, for example. Motion rod (3
(0) operating part (32) to the outer guide side (24), and when the drawer (1) is of a narrow width type, a part of the guide member (26) is cut to form the inner guide groove (24). 24) ′, and in this normal state, the lateral position of the rotating rod (30) is restricted, and the operating member (2) with respect to the pull member (15) is
The positional relationship of 7) and the rotating action of the rotating rod (30) are adjusted. Then, after the adjustment, the pull tab member (15) is attached to the front surface of the back plate (3) through the mounting holes (22) and (25) with a set screw or the like. The front plate (4) and the covering piece (12) are superposed on the collar piece (8) of the back plate (3), the engaging piece (11) is engaged with the step portion (7), and the pull tab is provided. The engaging rib (5) provided on the part (6),
By engaging the paragraph portions (16) 'and (18) of the frame body (17) with each other and superposing the mounting piece (14) on the collar piece (10) and fixing them by, for example, a set screw, a back plate. The face plate (4) is attached to (3).

FIG. 4 shows an exploded perspective view of the latch actuating mechanism, in which the driven rod (35) has the angular portion (37) at the bottom and the L-shaped portion at the top.
A contact part (3) that bends in a letter shape and contacts the operating part (32).
8) are provided respectively, and the holding member (40) has a vertically rectangular casing whose front surface is open and whose inner width in the lateral direction is set to a width in which the base of a latch lever described later can intervene. The front and left and right side edges, preferably at the lower end portions, are formed free by an outwardly protruding L-shaped locking rib (41) and two parallel cut lines (42) to retain a lateral elastic force. In addition, a locking piece (44) having an outward locking projection (43) at the tip is formed integrally with each other, and a base of a latch lever (to be described later) is interposed inside so as to face the lower surface. The partition (45) is integrally provided with a space that can be formed, and this holding member (40) is
An insertion hole (46) penetrating from the upper surface to the lower surface in the longitudinal direction and an insertion hole (47) penetrating in the lateral direction at a position facing the locking rib (41) and the locking piece (44) are provided. I am doing it.

The latch lever (50) has a lateral rectangular shape, has a latch hole (51) penetrating in the thickness direction at its tip, and has a notch recess (5) notched on the upper surface leaving a shaft (52) at the base.
3) is provided, and the side surface has an engaging groove (54) communicating with the cutout recess (53) and extending in the longitudinal direction, and
The driven rod (3
A square hole (55) is formed through the square portion (37) of (5).

Then, the winding part (60) a of the spring (60) is fitted on the upper part of the shaft part (52), and one of the pieces (60) is
b is engaged with the engaging groove (54), and in this state, the base of the latch lever (50) is interposed between the partition (47) in the holding member (40) and the lower surface. Then, as shown in FIG. 6, the pieces (60) b and (60) c of the spring (60) which are wide open are pressed inward to retain elasticity, and in this state, the other piece (60) ) C is locked in the cut groove (48) provided in the holding member (40), the one-way horizontal turning force is applied to the latch lever (50).

Then, the angular portion (37) of the driven rod (35) is inserted through the insertion hole (50) and the rectangular hole (54) in the longitudinal direction.

As described above, the holding member (40) including the driven rod (35), the latch lever (50) and the spring (60) is attached to the drawer (1) before the back plate (3) is attached to the front plate (4). )
The back plate (3) is attached to a square mounting hole (56) provided on one side of the back plate (3). One side of the mounting hole (56) has the locking rib (4
1) and the locking piece (44) is formed by a square hole having a length approximately equal to the height, and the locking rib (43) first laterally opposes the mounting hole (56). One edge is locked, and in this state, the locking piece (44) is pushed into the mounting hole (56), and as shown in FIG. 7, the locking protrusion (43) is opposed to the other edge. The holding member (4
0) is attached to the mounting hole (56).

In this state, the abutting portion (38) is pressed against the operating portion (32) of the rotating rod (30) by the urging force applied to the latch lever (50), and the operating member (26) is in a normal state due to this pressing force. As shown in FIG. 1, the substantially vertical state is maintained.

(57) indicates a cabinet for storing the drawer (1),
On the inner wall on the front opening side of this cabinet (P),
The latch stopper (58) is protruding as in the conventional case.

In the normal state, the latch lever (40)
By being biased in one direction by the spring (41), as shown in FIG. 3, the latch hole (51) engages with the latch stopper (58) provided on the inner wall of the cabinet (P). Then, the drawer (1) is latched in the state of being housed in the cabinet (P). From this latched state,
In order to pull out the drawer (1), insert a hand from the opening (6) into the pulling direction (15), and operate the operation member (2
When 7) is pulled toward the front, the operating member (27) tilts so that the operating portion (32) of the rotary rod (30) also tilts toward the front,
The contact portion (38) that is in pressure contact with the tilting portion (32) is pressed toward the front, and the latch lever (50) along with the driven rod (35) horizontally resists the biasing force of the spring (41). By rotating, the latch hole (51) separates from the latch stopper (58), the latched state of the drawer (1) is released, and in this state, the drawer (1) is pulled out to the front side.

Also, from the state where the drawer (1) is pulled out and the latch lever (50) is biased by the spring (41),
When the drawer (1) is pushed into the cabinet (P), the tip of the latch lever (40) climbs the inclined surface of the latch stopper (58) and tilts against the biasing force of the spring (41). The latch hole (51) automatically engages with the latch stopper (58).

The above shows the case where the holding member (40) is vertically attached to the back plate (3). According to this configuration, the lower part of the driven rod (35) is long in the holding member (40). Since it is supported by the upper and lower ends, it is effective in the case of a large-depth drawer (1) in which a long driven rod (35) is used.

On the other hand, in the case of a drawer having a small depth in which a short driven rod (35) 'is used, it is not necessary to support the lower part of the driven rod (35)' in a long range by the holding member (40), so that the holding member (40 ) Is a horizontal type, and the base of the latch lever (50) and the spring (60) are intervened in the end of the holding member (40), and in this state, the corner of the driven rod (35) ′ having a short length is It is inserted through the insertion hole (47) and the square hole (54) in the lateral direction.

Then, the holding member (40) provided with the driven rod (35) ', the latch lever (50) and the spring (60) is, as shown by the phantom line in FIG. The plate (3) is mounted by pushing it into a square mounting hole (56) provided on one side of the plate (3).

EFFECTS OF THE INVENTION As described above, according to the present application, since the attachment is performed by pushing the retaining member into the attachment hole provided in the back plate and locking the retaining member, workability is improved as compared with the case where the retaining member is screwed. In addition, since the spring and the latch lever are arranged to intervene in the holding member, the holding member, the spring and the latch lever can be integrated, which is convenient for the attachment work to the back plate. The holding member, the latch lever and the spring can be used in common even when the driven rods having different lengths are used depending on the depth of the drawer. When it is provided at the end position of the lever, the driven rod can be supported for a sufficiently long distance, and a smooth rotation action of the driven rod can be expected, and a shaft portion protruding upward is formed at the base of the latch lever. Winding around the center Holding member for fitting the winding portion of a spring having a portion, and for holding both pieces of the spring between the side surface of the latch lever and the inner surface of the holding member facing the holding member. When intervening inside, there is an advantage that the latch lever and the spring can be easily attached to the holding member.

[Brief description of drawings]

The drawings show an embodiment of the present application. FIG. 1 is a partial vertical cross-sectional side view in a state of being attached to a drawer, FIG. 2 is the same front view without a surface plate, and FIG. 4 and 5 are exploded perspective views of the latch actuating mechanism, FIG. 5 is an assembled perspective view of the latch actuating mechanism, FIG. 6 is a longitudinal side view of the latch actuating mechanism, and FIG. 7 is a transverse plan view of FIG. FIG. 9 is a partial cross-sectional view showing a locked state of the attachment hole and the holding member, and FIG. 9 is a perspective view showing another example of use with respect to FIG. In the figure, (1) is a drawer, (2) is a container, (3) is a back plate,
(4) is a surface plate, (6) is a pull tab, (15) is a pull member, (26) is a guide member, (27) is an operating member, (30) is a rotating rod, and (32) is an operating part. , (35), (35) 'are driven rods,
(38) is a contact portion, (40) is a holding member, (41) is a locking rib, (42) is a cut line, (43) is a locking projection, (44) is a locking piece, (46), (47) is the insertion hole, (50) is the latch lever,
(51) is a latch hole, (52) is a shaft part, (53) is a notch recess,
(56) is a mounting hole, and (60) is a spring.

Claims (4)

[Claims] 1. An operating part is provided at one end of a horizontal rotating rod which is rotated by tilting of an operating member arranged in a pulling member, and an abutting part for contacting the operating part is provided at an upper end. The base of the latch lever is pivotally supported on the lower end of the vertical driven rod, and the latch lever is constantly biased in one direction by the holding member attached to the back plate that constitutes the front part of the drawer. While holding it horizontally, the latch lever projects from the mounting hole provided on the back side of the back plate and is locked by the latch stopper, and this locked state is set by tilting the operating member to move the driven rod. In a drawer latch mechanism configured to rotate and release, a space between upper and lower edges of the mounting hole,
The left and right edges are formed to have the same interval, while the holding member is formed of a rectangular housing having an opening on the front surface and an inner width in the lateral direction having a width in which the latch lever can intervene.
A locking rib that is bent outward in an L-shape and locks on one of the opposite edges of the mounting hole is provided on the front surface of the one long side.
Further, on the front surface of the other long side, a pair of parallel cut lines is provided so as to be elastic so as to retain elasticity, and at the end portion, a protruding portion that engages with the other opposite edge portion of the mounting hole is provided outward. Locking pieces are provided respectively, and further in the longitudinal direction of the holding member,
In the lateral direction of the position where the locking rib and the locking piece are provided,
A drawer latch mechanism, wherein insertion holes for inserting the driven rods are formed respectively. 2. A latch mechanism for a drawer according to claim 1, wherein the locking rib and the locking piece are provided at an end position in the longitudinal direction of the holding member. 3. A drawer latch mechanism according to claim 1, wherein a base of the latch lever and a spring for elastically biasing the latch lever in one direction are interposed in the holding member. 4. A base portion of the latch lever is formed with a shaft portion projecting upward, and the winding portion of a spring having a winding portion at a central portion is fitted to the shaft portion, and both ends of the spring are fitted. The drawer latch according to claim 1 or 2, wherein the base is interposed in the holding member so that the piece is interposed between the side surface of the latch lever and the inner surface of the holding member facing the side surface. mechanism.