JPH0288869A - Latch mechanism of drawing inlet - Google Patents

Abstract

PURPOSE:To prevent pulling-out from a latch lever of a following lever at the time of usage for a prolonged term by integrally installing a guide member with a guide groove, with which the operating section of a rotational lever is engaged, to a holding frame while an abutting section is arranged so as to be abutted against the underside of the guide groove section. CONSTITUTION:A holding frame 40 is mounted to a mounting hole bored to the side section of a back plate 3 while the operating section 32 of a rotational lever 30 is engaged with the guide groove 46 of a guide section piece 47 and lateral movement of the rotational lever 30 is regulated, and the abutting section 36 of a following lever 35 is pressure-welded to the lower section of the operating section 32 of the rotational lever 30 by energizing force working on a latch lever 38. The upward component of force works on the abutting section 36 of the following lever 35 pressure-welded to the operating section 32 by the revolution of the operating section 32, said abutting section 36 is abutted against the underside of the guide groove 46 even when the following lever 35 intends to be lifted, and the lifting action of the following lever 35 is prevented. Accordingly, the following lever engaged and inserted to the latch lever is not pulled out of the latch lever, thus displaying an effect for usage for a prolonged term while also simplifying constitution extremely.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This application relates to a drawer latching mechanism in filing cabinets and the like.

BACKGROUND OF THE INVENTION Conventionally, a latch mechanism for fixing a drawer in a filing cabinet or the like to a cabinet when the drawer is in a stored state to prevent the drawer from accidentally popping out due to external vibrations such as an earthquake has been proposed, for example, in Japanese Utility Model Publication No. 59-22856.
This is known from Japanese Utility Model Publication No. 61-67371, etc., and its structure is such that one end of a horizontal rotating rod that is rotated by the tilting of an operating member disposed inside a pull member is bent at a right angle. A bending actuating part is provided, and the lower end of a vertical driven rod has an L-shaped contact part that comes into contact with the actuating part at the upper end, and is always elastically biased in one direction. A latch lever is provided on the holding frame so as to be horizontally rotatable, and the driven rod is rotated by tilting the operating member to release the locked state between the latch lever and the latch stopper. be.

Problem to be Solved by the Invention However, according to the above-mentioned conventional configuration, the square shaft portion provided at the lower end of the driven rod is engaged with the square shaft hole provided in the latch lever that passes through it in the vertical direction. At the same time, due to the tilting movement of the operating member, an upward component force acts on the contact portion in addition to rotational force on the pressure contact portion between the operating portion of the rotating rod and the contact portion of the driven rod. However, there is a risk that the driven rod may come off the latch lever during long-term use.

Therefore, the purpose of the present application is to prevent such concerns.

Means for Solving the Problems In order to achieve the above-mentioned object, the present application provides an operation for bending at right angles at one end of a horizontal rotating rod that is rotated by the tilting of an operating member disposed in a pull member. The lower end of a vertical driven lever has an L-shaped abutment part that abuts the actuating part at the upper end, and is horizontal to the holding frame in a state where it is always elastically biased in one direction. A rotatably held latch lever is provided, and by tilting the operating member, the driven rod is rotated to engage the latch lever and the latch stopper.
In the drawer latch mechanism configured to release Ji, a guide member having a guide groove for engaging the operating portion of the rotating rod is integrally provided in the holding frame, and a lower surface of the guide groove portion is provided with: It is characterized in that the abutment portion is arranged so as to abut against each other, and in the above structure, an engagement groove is provided at the position of the guide groove and perpendicular to the guide groove, and the driven rod is inserted into the engagement groove. The abutment portions are slidably engaged, and in order to facilitate manufacturing, the pull member is integrally provided with a shaft bearing portion that rotatably supports the rotating rod.

Function: When the operating member is tilted forward, the rotating rod that supports it is rotated, and the operating section is tilted forward, so that the abutting section that is in pressure contact with the operating member is tilted forward. When pressed, the latch lever and the driven lever horizontally rotate against the force, and this rotation causes the chilehar to separate from the latch stopper provided on the inner surface of the cabinet.

In the above, even if the driven rod attempts to rise due to the upward force acting on the abutting part, the abutting part is prevented from rising by the lower surface of the guide groove or the engagement groove.

In the above, when the pull member is integrally provided with a bearing part that rotatably supports the rotating rod, the pull member is attached to the back plate of the drawer with the rotating rod supported on the bearing part. Ru.

Embodiment The embodiment of the present application will be described in detail based on the drawings below. Figure 1 is a longitudinal sectional side view of the front part of the drawer (1).
) has a back plate (3) installed vertically on the front of the container (2), and a top plate (4) attached to the front of the container (2). , a pull opening portion (6) having an inward engaging rib (5) on the periphery is provided.

The back plate (3) has a collar piece (8) on the upper edge and left and right side edges, which is bent forward and protrudes horizontally, and has a step (7) along the middle position of the protruding length. ), and a flange piece (10) is also integrally provided on the lower edge, which similarly protrudes horizontally and has a downwardly directed convex strip (9) along the middle position of the protruding length.

The top edge and the left and right edges of the surface plate (4) are bent backwards and protrude horizontally, and the top edge of the face plate (4) is connected to the step (7) of the collar piece (8) along the front edge. A cover piece (1) that overlaps with the collar piece (8) having a downward retaining piece (11) that fits together.
2) is also bent rearward and protrudes horizontally on the lower edge, forming an upward protruding line (13) along the middle position of the protruding length, and this protruding line (13). Attachment pieces (14) fixed to the flange pieces (10) are provided integrally at positions 13). 4 to 6 show the pull member (15
), and this pull member (15) has a bottom plate, a back plate, and left and right side plates, and a horizontal bar ( 16), a horizontally long frame (17) that horizontally suspends the frame (16), a stepped portion (18) provided along the front edge of the left and right side plates from the front edge of the bottom plate of this frame (17), and one side plate. One shaft bearing part (20) is provided in an upright manner on the top surface and has a support hole (19) for rotatably supporting one end of a rotating rod (30), which will be described later. , the other shaft bearing part (21) that sandwiches and rotatably supports a rotating rod (30), which will be described later, from the front.
, a mounting part (23) provided on the back side of the outer surface of one side plate and having one mounting hole (22) therein, and a mounting hole provided in the other side plate facing the mounting hole (22). (
24), and this pull member (15) is molded from synthetic resin.

FIG. 7 shows an operating member (27) interposed within the pull member (15), and this operating member (27) has a vertically elongated fitting hole (28) with an open front surface at the top. It is composed of a horizontally elongated synthetic resin plate with a forwardly sloped slope portion (29) integrally formed at the bottom thereof.

FIG. 8 shows a rotating rod (30), which is attached to one end of a long horizontal part (31) and has a short operating part (3
2), and two V-shaped bent parts (33), (33) are formed in a part of the horizontal part (31).

The pull member (15), the operating member (27), and the rotating rod (30) configured as described above are first connected to the operating member (27).
Press fit the horizontal part (31) of the rotating rod (30) into the fitting hole (28) at the bent portions (33), (33) from the front side, and operate the rotating rod (30). After supporting the member (27), the operating member (27) inserts the horizontal portion (31) of the rotating rod (30) into the left and right bearing portions (20), ( 21), and then attach the pull member (15) through the mounting holes (22) and (24).
) to the front of the back plate (3) with set screws, etc. a driven rod (35) to which the rotational movement of the rotation rod (30) is transmitted;
) is bent in an L-shape and has the actuating portion (32
), and the rear end of the latch lever (38) is attached to the lower part so as to move together in the rotational direction, for example, by engaging the square shaft part and the square hole. The latch lever (38) is elastically biased in one direction by a spring (not shown) and is held horizontally rotatably in a vertically rectangular holding frame (40) with an open back. As shown in FIG. 9, this holding frame (40) has a back plate (
There are receiving lips (41) on the two long sides of the back that are lowered by a step corresponding to the thickness of the back plate (3) so that it can be installed by fitting into the rectangular mounting holes on the sides of 3). , on its lower side there is a protruding piece (42) that protrudes downward in an L-shape corresponding to the thickness of the back plate (3), and on its upper surface there are two parallel grooves (43).
A locking piece (45) having an elastic force separated by 'f1 and having a locking protrusion (44) on its leading edge is provided on one of the outer surfaces thereof, and a A guide piece (47) that extends in a bent manner and has a guide groove (46) that is open on the upper and lower sides and the front side by a pair of opposing vertical pieces that receive the abutment part (36) on the lower surface on the back surface of the upper end. It is integrated.

The holding frame (40) configured in this way has a back plate (
3), and the operating portion (32) of the rotary rod (30) is engaged with the guide groove (46) of the guide piece (47). (30) and the urging force acting on the latch lever (38) causes the abutting portion (36) of the driven rod (35) to ).

In this way, the pull member (15) including the rotating rod (30) and the operating member (27) and the driven rod (35) are attached to the back plate (3).
After attaching the holding frames (40) with the 7-chile levers (38), attach the front plate (4) to the collar piece (8) of the back plate (3).
) are polymerized to form a retaining piece (1) on the stepped portion (7).
1) and the engaging rib (5) provided on the pull opening (6) is connected to the stepped portion (16)' of the frame (17) and (1).
8) respectively, and the mounting piece (10) is engaged with the collar piece (10).
The front plate (4) is attached to the back plate (3) by superimposing the two pieces 4) and fixing them with, for example, set screws.

However, under normal conditions, the latch lever (38)
By being biased to rotate in one direction, the drawer (1) locks with the latch stopper (49) protruding from the inner wall of the cabinet (48), as shown in FIG. 48) is latched in the stored state. In order to pull out the drawer (1) from this latched state, open the pull opening (6).
), insert your hand into the pull member (15) and pull the operating member (27) in the vertical position towards you, the operating member (
27), the actuating part (32) of the rotating rod (30)
The contact portion (36) that is in pressure contact with the actuating portion (32) is pressed forward and the driven rod (
35), the latch lever (38) horizontally rotates against the pressing force, the latch lever (38) separates from the latch stopper (49), and the latched state of the drawer (1) is released. The drawer (1) is then pulled out toward the front.

Also, the drawer (1) is pulled out, and the latch lever (
When the drawer (1) is pushed into the cabinet (48) while the latch lever (38) is biased, the latch lever (38)
When the tip of the latch moves up the slope of the latch stopper (38) and tilts against the pressing force, it automatically locks on the latch stopper (38).

In the above, the rotation of the actuating part (32) causes an upward force to act on the abutting part (36) of the driven rod (35) that is in pressure contact with the actuating part (32), causing the driven rod (35) to rise. Even if the contact portion <36) contacts the lower surface of the guide groove (46), its upward movement is prevented.

FIG. 10 shows that in the above configuration, a pair of left and right vertical pieces forming the guide 11N (46) are provided with an engagement groove (50) which is perpendicular to the vertical pieces and opens at the front surface, and a driven groove is provided in the engagement groove (50). This shows another embodiment in which the abutting portion (36) of the rod (35) is slidably engaged, and its operation is the same as that of the first embodiment.

Effects of the Invention Since the present invention is constructed like a ridge, there is no risk that the driven lever or notch lever attached to the latch lever will come off even when used frequently and for a long period of time. It is effective in use and extremely simple in construction, and since the holding frame is provided with a guide member that engages the operating portion of the rotating rod, there is no need to separately attach the guide member to the back plate of the drawer. In addition, even when rotating rods of different lengths are used to manufacture cabinets with different widths of drawers, the holding frame with the guide member can be used in common. According to the above, since the handle member is integrally provided with a shaft bearing portion that supports the rotating rod, the handle member and the operating member are integrated, and it is convenient to adjust the positional relationship between them. When an engagement groove orthogonal to the groove is provided at the position of the groove and the abutting portion of the driven rod is slidably engaged in this engagement groove, the upper part of the driven rod is supported by the engagement II4. This makes it possible to achieve smooth rotation of the driven rod, which is particularly effective when the drawer is deep and requires a long driven rod. It has the advantage that a square rod can also be used as a driven rod.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a vertical sectional side view with a running mechanism, FIG. 2 is a partially omitted front view, FIG. 3 is a partially omitted top view, and FIG. 4 is a partially omitted top view. is a perspective view of the pull member, FIG. 5 is a front view of the pull member, and FIG. 6 is a simplified longitudinal cross-sectional view of the pull member.
FIG. 7 is a perspective view of the operating member, FIG. 8 is a perspective view of the rotating rod,
FIG. 9 is a perspective view of a holding frame equipped with a driven rod, a latch lever, and a guide member, and FIG. 10 is a diagram of another embodiment corresponding to FIG. 9. In the figure, (1) is the drawer, (3) is the back plate, (4) is the front plate,
(15) is a pull member, (20), (21) are a shaft bearing part,
(27) is the operating member, (30) is the rotating rod, (32) is the operating portion, (35) is the driven rod, (36) is the contact portion, (38)
is the latch lever ~, (4o) is the holding frame, (46) is the guide groove, (47) is the guide member, (48) is the cabinet, (4
9) is a latch stopper, and (5o) is an engagement groove. ~ ~ Figure

Claims (4)

[Claims] (1) An actuating portion bent at a right angle is provided at one end of a horizontal rotating rod that rotates by tilting of an operating member disposed within the pull member, and the upper end abuts the actuating portion. A latch lever is provided at the lower end of a vertical driven rod having an L-shaped abutment portion, and is held in a horizontally rotatable manner by a holding frame while being always elastically biased in one direction. In the drawer latch mechanism configured to rotate the driven rod and release the locked state between the latch lever and the latch stopper by a tilting operation, the operating portion of the rotating rod is engaged with the holding frame. 1. A latch mechanism for a drawer, characterized in that a guide member having a guide groove is integrally provided, and the abutting portion is arranged so as to abut on a lower surface of the guide groove. 2. The drawer latch mechanism according to claim 1, wherein an engagement groove is provided at the position of the guide groove and perpendicular to the guide groove, and the abutting portion of the driven rod is slidably engaged with the engagement groove. (3) The drawer latch mechanism according to claim 1 or 2, wherein the guide groove is formed by a pair of vertical pieces provided oppositely at the upper end of the guide member. (4) The drawer latch mechanism according to claim 1, 2 or 3, wherein the pull member is integrally provided with a bearing portion that rotatably supports the pivoting rod.