JPH0826717B2 - 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 to prevent the drawer from accidentally popping out due to an external vibration such as an earthquake is disclosed in, for example, Jpn. 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 on the lower end of a vertical driven rod having an abutting portion that abuts on the holding frame, which is attached to a back plate that constitutes the front part of the drawer. The latch lever is urged elastically and held horizontally, and the latch lever is projected to the back side of the back plate, and the driven rod is rotated by the tilting operation of the operating member to act as a latch lever and a latch stopper. Those configured to release the locked state.

However, according to the above-described conventional configuration, the holding frame is
Since it is fixed to the back plate constituting the front part of the drawer by screws, and the spring for biasing the latch lever in one direction is interposed between the latch lever and the drawer container. The work of attaching the holding frame to the back plate and the work of interposing the spring are troublesome, and there is a defect that the spring may come off during use.

Then, this application aims at preventing such a defect.

Means for Solving the Problems The present application, in order to achieve the above-mentioned object, is provided with an operating portion at one end of a horizontal rotating rod that is rotated by tilting of an operating member arranged in a pulling member, and A holding frame in which a latch lever is pivotally supported at the lower end of a vertical driven rod having an abutting portion for abutting the operating portion at the upper end, and the latch lever is attached to a back plate that constitutes the front portion of the drawer. In addition, it is held so that it can rotate horizontally with the elastic force always being urged in one direction.
In a latch mechanism of a drawer, wherein a latch lever is projected to the back side of the back plate, and a tilting operation of the operating member rotates the driven rod to release the locked state between the latch lever and the latch stopper. , A mounting hole that matches the outer shape of the holding frame is formed in the back plate, and a back side of the holding frame is formed in a step shape so as to face the inside of the mounting hole at the front edge of the facing surface portion. An abutment rib abutting against the front surface of the plate is provided on one of the opposing surface portions on the other side with a locking rib for abutting and engaging the opposite edge portion of the mounting hole and the back surface of the back plate on the other side. A retaining piece that retains elasticity by being separated through a cutting line and that has a retaining protrusion having a retaining protrusion that engages with the opposite edge of the mounting hole at the front edge, and that is provided in the holding frame. ,
The lower part of the driven rod is pivotally supported by the shaft part of the latch lever and a spring for elastically biasing the latch lever in one direction.

When mounting the holding frame in the mounting hole of the back plate, first lock the locking rib on one edge of the corresponding mounting hole, and then use the resilience of the locking piece. hand,
By pushing the locking projection into the mounting hole and locking it at the other edge of the corresponding mounting hole, the abutment rib abuts against the front surface of the back plate, and thus the holding frame is attached to the back plate. Is attached, and the contact portion of the driven rod is brought into pressure contact with the operating portion of the rotating rod by the elastic force of the spring biased by the latch lever.

Therefore, in a normal state, the latch lever which is urged to rotate in one direction engages with the latch stopper provided on the inner surface of the cabinet, and the drawer is latched in the cabinet.

When the operating member is tilted in this direction from this state, the rotary rod supporting the operating member is rotated, and the operating portion is tilted forward. Therefore, the contact portion press-contacted with the operating member moves forward. When pressed, the latch lever horizontally rotates together with the driven rod against the urging force, and by this rotation, the latch lever separates from the latch stopper provided on the inner surface of the cabinet.

Example Hereinafter, based on the drawings, an example of the present application will be described in detail.
FIG. 1 is a vertical side view of the front part of the drawer (1). This drawer (1) has a back plate (3) vertically provided on the front surface of the container (2), and at the front thereof, A face plate (4) is attached, and at a central position of the face plate (4), there is provided a handle mouth portion (6) having an inwardly directed rib (5).

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. The frame body (17) and the paragraph portion (18) provided from the front edge of the bottom plate of the frame body (17) along a part of the front edge of the left and right side plates, and provided in an upright state on the upper surface of one side plate, A bearing (20) having a bearing hole (19) for rotatably supporting one end of a pivoting rod (30) described later and a pivoting rod (30 described later) provided on the upper surface of the other side plate. ) Is squeezed from the front and rotatably supported, and a mounting portion (23) provided on the outer surface of one of the side plates near the back surface and having one mounting hole (22).
The pull member (15) configured in this manner has a horizontal projection on the outer surface of the other side plate, and a pair of hanging pieces are opposed to the two front surfaces,
A guide member (16) having a guide groove (24), (24) 'which is opened in the vertical direction and a front surface is separated from the front surface, and a guide hole (25) having the other mounting hole (25) at the base is integrally provided. Is molded integrally 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) of the rotating rod (30), and then the operating member (2).
Rotating rod (30) so that 7) intervenes in the frame (17).
Of the horizontal part (31) of the left and right bearings (20), (21) are respectively rotatably supported, and the operating part (32) is, for example, when the drawer (1) has a wide width, Motion rod (3
0) the operating part (32) to the outer guide groove (24), and when the drawer (1) has a narrow width, a part of the guide member (26) is cut to form the inner guide groove (24). 24) ′, and in this state, the lateral position of the rotating rod (30) is restricted and the operating member (2
The positional relationship of 7) and the rotating action of the rotating rod (30) are adjusted. Then, after the adjustment, the pulling 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. Next, the front plate (4) and the covering piece (12) are superposed on the flange piece (8) of the back plate (3), the engaging piece (11) is engaged with the step portion (7), and the pulling piece is pulled. The engaging ribs (5) provided on the mouth portion (6) are engaged with the paragraph portions (16) 'and (18) of the frame body (17), respectively, and attached to the collar piece (10). Back plate (3) by superposing and fixing with, for example, set screws
A face plate (4) is attached to the.

FIG. 4 is an exploded perspective view of the main part of the driven rod (35).
Has a corner portion (37) at the lower portion, an abutment portion (38) at the upper portion when bent into an L-shape and comes into contact with the operating portion (32), and the holding frame (39) is , A contact rib (42) projecting to the side on the left and right side edges of the front surface of a vertically rectangular housing having a height corresponding to the thickness of the back plate (3) and protruding laterally. In addition, a locking rib (43) protruding downward in an L shape corresponding to the thickness of the back plate (3) is further provided at the center of the upper edge,
Two parallel cutting lines (44) keep the elastic force in the up and down direction, and the tip of the locking projection (45) is upward.
Locking piece (46) integrally with each other, and inside it, a pair of vertically opposed partitions (47), (47) and a central edge projecting, the front edge is recessed in an arc shape. Therefore, the receiving piece (48) is integrally provided with each of them. Further, a cut groove (49) is provided on one side of the holding frame (39), and an insertion hole (50) penetrating from the upper surface to the lower surface is also formed.

The latch lever (40) 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 its upper surface leaving a shaft (52) at its rear.
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). Reference numeral (41) is a spring having a winding portion (41) a at the center thereof.

Then, the winding part (41) a of the spring (41) is fitted to the upper part of the shaft part (52), and one of the pieces (41) is formed.
b is engaged with the engagement groove (54), and in this state, the shaft portion (52) of the latch lever (40) is placed between the upper and lower partitions (47) and (47) in the housing (39). And the back surface is brought into contact with the curved portion of the front edge of the receiving piece (48). Then, the widely opened pieces (41) b and (41) c of the spring (41) are pressed inward to retain elasticity, and in this state, the other piece (41) c.
Is locked in the cut groove (40) provided in the housing (39), the unidirectional horizontal turning force is applied to the latch lever (40).

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

As described above, the holding frame (39) including the driven rod (35), the latch lever (40) and the spring (41) has the drawer (1) before the front plate (4) is attached to the back plate (3). )
Locking ribs (4) on the lower edge of the rectangular mounting hole (55) matching the outer shape of the holding frame (39) provided on one side of the back plate (3) of
3) is locked, then using the elasticity of the locking piece (46),
By pushing the locking projection (45) into the mounting hole (55) and locking the locking projection (45) to the upper edge thereof and pressing the contact rib (42) against the front surface of the back plate (3), the holding frame (39) is formed. The contact part (38) is securely attached to the back plate (3) and is pressed against the operating part (32) of the rotating rod (30) by the urging force applied to the latch lever (40). Operation members (26)
Is in a normal state and is maintained in a substantially vertical state as shown in FIG.

(56) indicates a cabinet for storing the drawer (1),
The inner wall on the front opening side of this cabinet (56)
The latch stopper (57) 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) is engaged with the latch stopper (57) projecting from the inner wall of the cabinet (56). Then, the drawer (1) is latched while being housed in the cabinet (56). From this latched state,
In order to pull out the drawer (1), the hand is inserted into the pulling member (15) through the opening (6), and the operating 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), which is in pressure contact with the operating portion (32), is pressed in the forward direction, and the latch lever (40) along with the driven rod (35) horizontally resists the urging force of the spring (41). By rotating, the latch hole (51) is separated from the latch stopper (57), 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 (40) is biased by the spring (41),
When the drawer (1) is pushed into the cabinet (56), the tip of the latch lever (40) climbs the inclined surface of the latch stopper (57) and tilts against the biasing force of the spring (41). The latch hole (51) automatically engages with the latch stopper (57).

EFFECTS OF THE INVENTION As described above, according to the present application, since the mounting is performed by pushing and holding the holding frame in the mounting hole provided in the back plate, workability is improved as compared with the case where the holding frame is screwed. In addition to excellent mounting, the locking ribs and locking projections that face each other in the mounting hole are locked, and the contact ribs that face the other are pressed against the back plate, so that the holding frame can be mounted securely. In addition, since the spring and the latch lever are arranged to intervene in the holding frame, the holding frame, the spring and the latch lever can be integrated, which is convenient for the attachment work to the back plate. , The shaft portion of the latch lever is projected upward, and the winding portion of a spring having a winding portion in the center is fitted to the protruding portion, and the fitting portion is intervened in the holding frame to form the spring. On both sides of the latch lever, When they are pressed against the inner surface of the holding frame that faces them, the spring portion of the spring is fitted to the shaft portion of the latch lever, and the spring is only inserted into the holding frame. Since power can be obtained, it has an advantage that it is extremely effective in manufacturing.

[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. Fig. 4 is an exploded perspective view of the main part, Fig. 5 is a vertical side view of Fig. 4, and Fig. 6 is a cross-sectional plan view of Fig. 4. In the figure, (1) is a drawer, (2) is a container, (3) is a back plate,
(4) is a face plate, (6) is a pull tab, (15) is a pull member, (20) and (21) are bearing parts, (26) is a guide member, (2
7) is an operating member, (30) is a rotating rod, (32) is an operating part, and (3
3) is a bent portion, (35) is a driven rod, (38) is an abutting portion, (4)
0) is a latch lever, and (41) is a spring.

Claims (2)

[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. A latch lever is pivotally supported on the lower end of the vertical driven rod, and the latch lever is horizontally attached to a holding frame attached to the back plate that constitutes the front part of the drawer while being constantly biased in one direction. The latch lever is rotatably held, and the latch lever is projected toward the back side of the back plate so that the driven rod is rotated by the tilting operation of the operation member to release the latched state between the latch lever and the latch stopper. In the drawer latch mechanism configured as described above, the back plate is provided with a mounting hole that matches the outer shape of the holding frame, and the front edge of the surface portion of the holding frame that faces one side,
A contact rib that is formed in a step so as to face the inside of the mounting hole and abuts on the front surface of the back plate is provided on one of the facing surface portions on the other side, and on the opposite edge of the mounting hole and the back surface of the back plate. The locking rib that abuts and locks is further provided on the other side so as to have elasticity by being separated through a cut line, and a locking protrusion that locks with the opposite edge of the mounting hole at the front edge. And a lower portion of the driven rod of the latch lever shaft portion with the shaft portion of the latch lever and the spring for elastically biasing the latch lever in one direction interposed in the holding frame. Latch mechanism of the drawer, which is characterized by supporting the. 2. The spring according to claim 1, wherein the shaft portion of the latch lever is projected upward through the interposition of the spring, and the winding portion of the spring having the winding portion at the center is fitted to the projection portion.
In this state, both pieces of the spring intervene the shaft portion in the holding frame so as to be interposed between the side surface of the latch lever and the inner surface of the holding frame facing the latch lever. Latch mechanism.