JPH09215541A - Latch device of drawer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separately provide a lever and a crankshaft to be manufactured easily and at a low cost by projecting a downward hook on the rear surface of a lever pivoted on the front plate of a drawer, and transmitting force to a driven part and a latch through the crankshaft by the pivotal movement of the lever to be released by a locking member. SOLUTION: When a secure hand piece 7b of a lever 7 is drawn forward to the upper side to draw a drawer from a cabinet main body, a driving part 17 is turned with a crank part of a crankshaft 13 by a downward hook, and a latch shaft 21 is turned with a drawn part 22, so that a latch 23 is turned against a spring 25 and a locking hole 24 is released from a locking projection 26 to draw out a drawer. On the other hand, if a drawn-out drawer is pushed in, the latch 23 is pressed by the locking projection 26 to turn while elastically bending the spring 25 to force the drawer into the cabinet main body, and when the locking hole 24 reaches the side of the locking projection 26, the latch is turned by energization of the spring 25 and the locking hole 24 is engaged with the locking projection 26 and locked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filing cabinet having a drawer (hereinafter referred to as cabinet).
And a latch device for the drawer in FIG.

[0002]

2. Description of the Related Art A cabinet having a drawer is sometimes provided with a drawer latch device so that the drawer does not come out even if the cabinet is moved carelessly or a large impact is applied.

[0003]

The conventional latch device has the following problems.
Since the lever for latching and the latch lever shaft are integrated, the shape is complicated and the manufacturing is complicated, and in order to securely engage and disengage the latch with the locking body, the lever rotation is required. It was necessary to increase the angle.

As a result, the operability of the lever deteriorates, and the drive portion provided orthogonal to the end of the crankshaft becomes long, and the range of rotation becomes wide forward and backward, so the front panel of the drawer is solid. It was difficult to provide these members in a cabinet made of wood.

An object of the present invention is to provide a latch device which solves the above problems of the conventional device.

[0006]

According to the present invention, the above object is to provide a downward hook protruding from the rear surface of a lever pivotally mounted on the front surface of a drawer front plate about the left and right axes, and pivotally installed in the front plate. A crank portion that is eccentric to the axis of the crank shaft facing in the left-right direction and can come into contact with the downward hook is provided, and a drive portion orthogonal to the axis is provided at the end of the crank shaft. And, at the one end of the latch shaft pivotingly provided at the inner end of the front plate and oriented in the up-down direction, a driven part which is horizontal and intersects with the drive part is provided, and at the other end of the latch shaft, a latch which faces rearward is provided The latch is always locked by a spring force to the locking body provided on the inner surface of the cabinet, but by rotating the lever forward, it is disengaged from the locking body. Will be resolved.

[0007]

FIG. 5 shows a cabinet to which the present invention is applied. (1) is a cabinet body, (2) is a side plate,
(3) is a drawer, (4) is a front plate of the drawer (3), which consists of a wooden decorative plate (4a) and a steel reinforcing plate (4b) (see FIG. 3) covering the rear surface with a required gap. The decorative plate (4a) has an opening (5) for operating the lever (7) described later.

As shown in FIGS. 1 to 4, particularly FIG. 3, the front piece (6a) of the lateral rectangular case (6) fitted behind the opening (5) in the reinforcing plate (4b) is The rear piece (7a) of the lever (7) is polymerized. At the upper end of the rear piece (7a) of the lever (7), a handle piece (7b) that curves forward and downward is connected. Similarly, at the upper end of the rear surface, a pair of left and right pivotal support pieces (8) are also provided. A downward hook (9) is projectingly provided at the central portion.

The pivot support pieces (8) (8) and the downward hooks (9) penetrate the front piece (6a) of the case (6), and the pivot support pieces (8) (8) are drilled. By inserting the erected pivot rod (11) into the support hole (10) between the front upper parts of both side pieces (6b) of the case (6),
(7) is pivotally supported by case (6).

A crankshaft (13) is inserted into a through hole (12) formed in the rear portion of the side piece (6b) of the case (6). The crank shaft (13) is provided with a crank portion (14) which is displaced downward in the case (6) and comes into contact with the front surface of the tip of the downward hook (9).

Draw out (3) near both ends of the crankshaft (13).
Support plate (15) (1) fixed near both ends of the inner surface of the front plate (4) of
A drive unit (17) facing downward is provided at both ends of the crankshaft (13), which is supported by 6).

Opening (5) of the decorative plate (4a) in the front plate (4)
Is a cover that covers the periphery of the lever (7) and opens at the front.
(18) is fitted from the front, and female screw cylinders (19) (Fig. 3) projecting rearward from both side ends of the cover (18) penetrate the front piece (6a) of the case (6) to reinforce it. It is fastened to the plate (4b) with screws (19a). That is, this screw (19a)
The (18) and the case (6) are squeezed together with the reinforcing plate (4b).

Below the crankshaft (13), the front plate
A latch shaft (21) facing upward is pivotally supported by the pivot support (20) fixed to the inner surface of the side of (4). A driven part (22) facing the inner side and intersecting the drive part (17) of the crankshaft (13) and abutting against the front surface thereof is provided on the upper part of the latch shaft (21).

A latch (23) facing rearward is fixed to the lower end of the latch shaft (21), and a locking hole (24) facing inward and outward is formed near the tip of the latch (23). There is.

A spring (25), which is a conical coil spring, is contracted between the side surface of the drawer (3) and the middle portion of the latch (23). This spring keeps the latch (23) always outward. Is urged by.

On the inner surface of the side plate (2) of the cabinet body (1), a locking hole for the latch (23) when the drawer (3) is closed.
A locking protrusion (26) is provided at a location facing the (24).

In the above-mentioned cabinet, since the locking hole (24) of the latch (23) is engaged with the locking projection (26) by the biasing force of the spring (25) at all times, the cabinet is greatly shaken. However, the drawer (3) will not come out.

In order to pull out the drawer (3) from the cabinet body (1), when the handpiece (7b) of the lever (7) is held and pulled forward and upward, the downward hook (9) rotates forward. Then, since the drive part (17) rotates forward together with the crank part (14), the latch shaft (21) rotates together with the driven part (22), and the latch (23)
Rotates inward while elastically bending the spring (25), and the locking hole (24) is disengaged from the locking projection (26), so the drawer (3)
Is withdrawn.

After pulling out the drawer (3) slightly,
Even if the hand is released from (7), the drawer (3) can be freely moved back and forth.

When the drawer (3) pulled out is pushed in, the latch (23) is pressed by the locking projection (26), and the leaf spring (25) is elastically bent and pivoted inward to be pulled out. (3) is pushed into the cabinet body (1), and the locking hole (24) has the locking protrusion (2
When it reaches the side of 6), it is pivoted outward by the biasing force of the spring (25), and the locking hole (24) engages with the locking projection (26) and is locked.

[0021]

【The invention's effect】

(A) Since the lever and the crankshaft are separate bodies, they can be manufactured easily and at low cost.

(B) By adjusting any of the position of the pivot hole in the lever, the turning radius of the crank, the length of the latch, and the length from the intersection of the driving portion and the driven portion to the clink shaft and the latch shaft. Since the latch and the locking projection can be reliably engaged and disengaged without increasing the turning angle of the lever, the entire device can be made compact and incorporated in various cabinets.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the device of the present invention.

FIG. 2 is a front view of an operation unit of the device of the present invention.

FIG. 3 is a vertical sectional side view taken along line AA of FIG. 2;

FIG. 4 is an exploded side sectional view of each member shown in FIG.

FIG. 5 is a perspective view of a cabinet to which the present invention is applied.

[Explanation of symbols]

 (1) Cabinet body (2) Side plate (3) Drawer (4) Front plate (4a) Decorative plate (4b) Reinforcing plate (5) Opening (6) Case (6a) Front piece (6b) Side piece (7) Lever (7a) Rear piece (7b) Hand piece (8) Pivot piece (9) Downward hook (10) Pivot hole (11) Pivot rod (12) Through hole (13) Crankshaft (14) Crank part (15) (16) Support (17) Drive (18) Cover (19) Female threaded cylinder (19a) Screw (20) Pivot (21) Latch shaft (22) Follower (23) Latch (24) Stop hole (25) Spring (26) Locking body

Claims (1)

[Claims] 1. A downward hook is projectingly provided on the rear surface of a lever pivotally mounted on the front surface of a drawer front plate around the left and right axes, and the hook is pivotally mounted on the front plate at a key portion of the crankshaft directed in the left and right direction. A crank portion that is eccentric to the axis and can come into contact with the downward hook is provided, and a drive portion that is orthogonal to the axis is provided at the end of the crankshaft, and the vertical direction pivotally provided at the inner end of the front plate is provided. A driven part that is horizontal and intersects with the drive part is provided at one end of the latch shaft that faces, and a latch that faces rearward is provided at the other end of the latch shaft. A latch device for a drawer, which is locked to a locking body provided on an inner side surface, but is disengaged from the locking body by rotating a lever forward.