JPH0826716B2 - 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, for example, in Japanese Utility Model Publication No. Sho 59-22856. It is known in Japanese Laid-Open Patent Publication No. 61-67371, etc., and its structure is bent at a right angle to one end of a horizontal turning rod that is turned by tilting of an operating member arranged in a pulling member. And a lower end portion of a vertical driven rod having an L-shaped abutting portion that abuts the operating portion at the upper end,
A latch lever, which is held in a holding frame so as to be horizontally rotatable in a state where it is always elastically urged in one direction, is provided.By tilting the operating member, the driven rod is rotated to engage the latch lever with the latch stopper. It is configured to release the stopped state.

However, according to the above-described conventional configuration, the angular shaft portion provided at the lower end of the driven rod is engaged with the angular shaft hole that penetrates the latch lever in the vertical direction. At the same time, the pressure contact portion between the vertical actuating portion of the rotary rod and the horizontal abutting portion of the driven rod is rotated by the abutting portion due to the tilting movement of the operating member. Therefore, although it is rare, the lower end of the driven rod may be pulled out of the shaft hole of the latch lever during long-term use.

Then, this application aims at preventing such a fear.

Means for Solving the Problems In order to achieve the above-mentioned object, the present application has an operation of bending at a right angle to one end of a horizontal rotating rod which is rotated by tilting of an operating member arranged in a pulling member. And a lower end of a vertical driven rod having an L-shaped abutting portion that abuts against the actuating portion at the upper end and is horizontally urged in one direction to the holding frame at all times. The latch lever rotatably held is rotatably inserted into a shaft hole, and the tilting operation of the operating member causes the driven rod to rotate to release the latched state between the latch lever and the latch stopper. In the latch mechanism of the drawer configured as described above, the holding frame is integrally provided with a guide member having a guide groove for engaging the operating portion of the rotating rod, and the contact portion is provided on the lower surface of the guide groove portion. It is characterized in that it is arranged so as to abut. In the above structure, an engaging groove orthogonal to the guide groove is provided at the position of the guide groove, and the contact portion of the driven rod is slidably engaged in the engaging groove. Further, the pulling member is integrally provided with a bearing portion for rotatably supporting the rotating rod.

Action However, when the operating member is tilted in the front direction, 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.

Further, in the above, even if the driven rod tries to rise due to the upward component force acting on the contact portion, the rise of the contact portion is prevented by the lower surface of the guide groove portion or the engagement groove.

In the above description, when the pulling member is integrally provided with a bearing for rotatably supporting the rotating rod, the pulling member is mounted on the back plate of the drawer while the rotating rod is supported by the bearing. It

Example Hereinafter, based on the drawings, an example of the present application will be described in detail.
FIG. 1 is a vertical cross-sectional 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 a front surface. A face plate (4) is attached, and a handle portion (6) having an inward engaging rib (5) is provided at the center of the face plate (4).

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, at the lower edge as well, it is bent rearward and protrudes horizontally to form an upward protruding ridge (13) along the middle position of the protruding length, and this ridge (13) At the position
Mounting pieces (14) fixed to the collar pieces (10) are integrally provided. FIGS. 4 to 6 show a pull tab member (15), which has a bottom plate, a back plate, and left and right side plates, and a paragraph at the bottom between the upper front edges of the left and right side plates. A horizontally long frame body (17), which is formed by horizontally crossing a horizontal crosspiece (16) having a portion (16) ', and is provided along the front edge of the bottom plate of the frame body (17) along part of the front edge of the left and right side plates. And a rotating rod (30) to be described later, which is provided upright on the upper surface of one side plate.
One bearing portion (20) having a bearing hole (19) for rotatably supporting one end of it and the other side plate upper surface are provided so that a turning rod (30) described later is clamped from the front and rotatable. The other bearing portion (21) to be supported and the mounting portion (2) provided on the outer surface of the one side plate from the back surface and having one mounting hole (22).
3) and a mounting hole (24) provided in the other side plate facing the mounting hole (22), and the pull tab member (15) is molded of synthetic resin.

FIG. 7 shows an operating member (27) interposed in the pulling member (15). This operating member (27) has a vertically long fitting hole (28) with an open front surface at the upper part. At the bottom,
It is composed of a horizontally long synthetic resin plate integrally formed with an inclined portion (29) inclined forward.

FIG. 8 shows the rotating rod (30), which has a short actuating portion (32) bent at a right angle at one end of a long horizontal portion (31).
And two V-shaped bent portions (33) and (33) are formed in a part of the horizontal portion (31).

The pulling member (15), the operating member (27) and the rotating rod (30) configured as described above are first rotated from the front surface into the fitting hole portion (28) of the operating member (27). Horizontal part of rod (30) (3
After press-fitting into the positions of the bent portions (33) and (33) of 1) to support the operating member (27) of the rotating rod (30), the operating member (2
Rotating rod (30) so that 7) intervenes in the frame (17).
After rotatably supporting the horizontal portion (31) of each of the horizontal portions (31) on the left and right bearing portions (20) and (21), the pull tab member (15) is attached to the back plate (3) through the mounting holes (22) and (24). Attach it to the front of the machine with a set screw. The driven rod (35), to which the rotating action of the rotating rod (30) is transmitted, is provided with an abutting portion (36) at an upper portion thereof which is bent into an L shape and comes into contact with the operating portion (32). Further, the rear end of the latch lever (38) is attached to the lower part so as to co-operate in the rotation direction, for example, by engaging the square shaft portion and the square hole, and the latch lever (38) is provided with a spring (not shown). (1) is elastically biased in one direction and is horizontally rotatably held by a vertical rectangular holding frame (40) having an open rear surface. As shown in FIG. 9, the holding frame (40) has a back plate on two longitudinal sides of the back surface so that the holding frame (40) can be mounted by being fitted into a rectangular mounting hole provided on a side portion of the back plate (3). Corresponding to the thickness of (3), the receiving rib (41) is lowered one step, and the back plate (3) is on the lower side thereof.
(42) that projects downward in an L shape corresponding to the thickness of
However, on the upper surface, there are provided locking pieces (45) each having an elastic force released by two parallel cut grooves (43) and having a locking protrusion (44) at the leading edge. A guide which is bent upwardly on one of the outer side surfaces thereof, and which is opened at the upper and lower sides and front side by a pair of opposed hanging pieces which receive the contact portion (36) on the lower surface at the upper end rear surface. A guide piece (47) having a groove (46) is integrally provided.

The holding frame (40) configured as described above is mounted in a mounting hole formed in a side portion of the back plate (3), and the rotating rod is inserted in the guide groove (46) of the guide piece (47). The actuating portion (32) of the (30) is engaged to restrict the lateral movement of the rotating rod (30), and the urging force acting on the latch lever (38) applies a force to the driven rod (35). The contact part (36) is pressed against the lower part of the operating part (32) of the rotating rod (30).

As described above, the back plate (3) is provided with a pulling member (15) including a rotating rod (30) and an operating member (27), and a holding frame (40) including a driven rod (35) and a latch lever (38). ) Are respectively attached, the cover piece (12) of the surface plate (4) is superposed on the flange piece (8) of the back plate (3), and the engagement piece (11) is engaged with the step portion (7). The engaging ribs (5) provided on the pull handle opening (6),
By engaging the paragraph portions (16) 'and (18) of the frame body (7) 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).

In the normal state, the latch lever (38)
By being biased in one direction, as shown in FIG. 3, the drawer (1) is engaged with the latch stopper (49) protruding from the inner wall of the cabinet (48), and the drawer (1) is moved to the cabinet (48). It is latched when it is stored in 48). From this latched state, a hand is inserted into the pulling member (15) from the pulling handle opening (6) to pull out the drawer (1), and the vertically operating member (27) is pulled toward the operating member. Due to the tilting of (27), the operating part (32) of the rotating rod (30) also tilts toward the front side, and the contacting part (36) press-contacting this operating part (32),
When it is pressed in the front direction, the latch lever (38) rotates horizontally with the follower rod (35) against the elastic force, and the latch lever (38) separates from the latch stopper (49) and the drawer ( The latched state of 1) is released, and in this state, the drawer (1) is pulled out in the front direction.

In addition, when the drawer (1) is pulled out and the latch lever (38) is elastically biased, the drawer (1) is pushed into the cabinet (48), and the tip of the latch lever (38) becomes a latch stopper (38). While climbing the inclined surface of (38), it tilts against the urging force and then the latch stopper (3
8) automatically lock.

Then, in the above, due to the rotation of the actuating portion (32), an upward component force acts on the contact portion (36) of the driven rod (35) that is in pressure contact with this, and the driven rod (35) will rise. Even so, the abutting portion (36) comes into contact with the lower surface of the guide groove (46), and its ascending action is blocked. FIG. 10 shows a pair of left and right hanging pieces that form the guide groove (46) in the above structure.
An engaging groove (50) that is orthogonal to that and opens on the front surface is provided, and another engaging groove (50) in which the abutting portion (36) of the driven rod (35) is slidably engaged The embodiment is shown, and the operation is the same as that of the first embodiment.

EFFECTS OF THE INVENTION Since the present application is configured as described above, there is no fear that the driven rod engaged with the latch lever will be pulled out from the latch lever even if it is used frequently and for a long period of time. In addition, the holding frame is provided with a guide member for engaging the operating portion of the rotary rod, so that the guide member does not need to be separately attached to the back plate of the drawer. At the same time, in order to fabricate cabinets having different widths of the drawer, even if the rotating rods having different lengths are used, there is an advantage that the holding frame having the guide member can be shared, and according to the present application. For example, since the handle member is integrally provided with the bearing portion that supports the rotating rod, the handle member and the operating member can be integrated, which is convenient for adjusting the positional relationship between them and the guide groove. The position orthogonal to this position When a mating groove is provided and the abutment part of the driven rod is slidably engaged in the engagement groove, the upper part of the driven rod is supported by the engagement groove so that the driven rod can be smoothly rotated. It is effective especially when the drawer is deep and requires a long driven rod, and it is also possible to use a square rod as a driven rod without processing the lower part of the driven rod such as a square portion. It has the advantage that it can.

[Brief description of drawings]

The drawings show an embodiment of the present application. FIG. 1 is a vertical sectional side view equipped with a latch mechanism, FIG. 2 is a partially omitted front view, FIG. 3 is a partially omitted top view, and FIG. FIG. 5 is a perspective view of the pull tab member, FIG. 5 is a front view of the pull tab member, FIG. 6 is a longitudinal sectional view of the pull tab member, FIG. 7 is a perspective view of the operating member, FIG. 8 is a perspective view of the rotating rod, and FIG. FIG. 10 is a perspective view of a holding frame provided with a driven rod, a latch lever, and a guide member, and FIG. 10 is a diagram of another embodiment corresponding to FIG. In the figure, (1) is a drawer, (3) is a back plate, (4) is a front plate,
(15) is a pulling member, (20) and (21) are bearing portions, (27) is an operating member, (30) is a rotating rod, (32) is an operating portion, (35) is a driven rod, and (36). Is the contact portion, (38) is the latch lever, and (4
(0) is a holding frame, (46) is a guide groove, (47) is a guide member, (4)
8) Cabinet, (49) Latch Stopper, (5
0) is an engaging groove.

Claims (4)

[Claims] 1. An operating portion bent at a right angle 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 the operating portion is provided at the upper end. A shaft hole provided in a latch lever that is horizontally rotatably held by a holding frame with a lower end portion of a vertical driven rod having an L-shaped abutting portion that abuts on the holding frame while being constantly biased in one direction. In the latch mechanism of the drawer, which is non-rotatably engaged with the operating member, the driven rod is rotated to release the locked state between the latch lever and the latch stopper by tilting the operating member. A drawer is characterized in that a guide member having a guide groove for engaging the operating portion of the rotating rod is integrally provided, and the contact portion is arranged so as to contact the lower surface of the guide groove portion. Latch mechanism. 2. A latch for a drawer according to claim 1, wherein an engaging groove orthogonal to the guide groove is provided at a position of the guide groove, and a contact portion of the driven rod is slidably engaged with the engaging groove. mechanism. 3. The drawer latch mechanism according to claim 1, wherein the guide groove is formed by pairing a pair of hanging pieces on the upper end of the guide member. 4. A drawer latch mechanism according to claim 1, 2 or 3, wherein the pulling member is integrally provided with a supporting portion for rotatably supporting the rotating rod.