JPH09228712A - Operating device for latch device of drawer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the work of mounting a rotating shaft for operating a latch placed on the back of a front panel for the panel board of a drawer and to prevent shaking. SOLUTION: A knob piece 9 projected from a portion of a rotating shaft 8 supported on axis to the back of a front panel 1a is opposed to a knob hole bored in the front panel 1a, and a projection 31 projected form the rotating shaft 8 is made to abut to the upper surface of a stopper plate 30 projected at right angles to the back of the front panel 1a. With the knob piece 9 not gripped by finger, an energizing force imparted by a spring provided in a latch energizes and rotates the rotating shaft 8 in the direction shown by the arrow A, via an abutting element and an operating piece 12, and the projection 31 is made to abut to the upper surface of the stopper plate 30 to prevent further rotation of the rotating shaft 8 about its axis to hold the knob piece 9 in a stable position so that it does not rock.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an operating device for a drawer latch device in a cabinet or the like.

[0002]

2. Description of the Related Art Conventionally, the prior art 59-5
As disclosed in Japanese Patent Publication No. 1965, Japanese Utility Model Publication No. 5-32606, etc., the end plate of the drawer in the cabinet may be integrally formed of a metal plate by the front plate and the peripheral frame plate facing rearward around the front plate. The pivot shaft having a pull tab is pivotally supported by a pivot supporting portion projecting on the back surface of the front plate of the end plate or the back cover made of a metal plate covering the back surface of the front plate. Then, the pull tab piece is brought into contact with the pull tab hole formed in substantially the center of the front plate of the end plate. Then, a linear actuating piece that bends and protrudes downward is fixed to the rotating shaft so that the tip of the actuating piece approaches the back surface of the front plate of the end plate when the pulling piece is rotated forward from the pulling hole. To configure.

On the other hand, the rotation support portion of the latch body, which is biased in the engagement direction by a spring, is attached to the back surface of the front plate of the end plate or to the back cover body to rotate the latch body in the engagement release direction. The horizontal contact portion for contacting the operating piece is brought into contact with the operating piece. In these cases, in Japanese Utility Model Laid-Open No. 59-51965, a shaft support portion opened upward on the upper surface of the frame body for the pull hole and a shaft opened upward on the frame body fixed to the rear surface of the front plate so that the latch body can be mounted. The horizontal longitudinal portion of the rotary shaft is fitted into the support portion from above, and the downward operating piece of the rotary shaft is brought into contact with the horizontal contact portion of the latch body.

In Japanese Utility Model Publication No. 5-32606,
One end of the horizontal rotation shaft is rotatably fitted into a round hole-shaped bearing portion provided on a metal plate back cover body that covers the back side of the front plate, while it is provided on the back cover body. The midway portion of the rotary shaft and the vicinity of the operating piece are fitted and inserted into the downwardly open and upwardly open shaft supporting portions, respectively, so as to be rotatable.

[0005]

However, in the former case of the prior art, when the operator's finger hits the pull tab and pushes the rotation shaft upward, the rotation shaft is easily disengaged from the shaft support. Therefore, it is necessary to cover the shaft support portion from above with another member from the back surface of the frame body for the pull hole. Further, in the latter of the prior art, it is necessary to fit the rotation shaft into the shaft support portions that are opened in different directions from each other vertically, and for that, the middle part of the rotation shaft must be curved and deformed with respect to the axis line. There is a problem that it takes time to install the rotating shaft.

Further, none of the above-mentioned prior arts is provided with a restricting means such as a stopper for preventing the rotation shaft from rotating in the direction opposite to the disengagement direction. That is, in each of the above-mentioned prior arts, when the rotary shaft is rotated in a predetermined direction around its axis by the pull tab piece facing the pull hole in the front plate of the end plate, the operation protruding from the rotary shaft is performed. The piece rotates the contact portion against the urging force of the latch body, but since the rotation shaft can also rotate in the opposite direction, it was exposed from the front side of the end plate into the pull hole. When the operator's finger hits the pull tab, the pivot shaft sways around its axis, causing the posture of the pull tab to be unstable with respect to the pull hole, or when the operating piece collides with the abutting part. There was a problem such as abnormal noise.

The present invention has been made in order to solve these problems, and it is possible to easily attach the rotating shaft to the end plate of the drawer and to prevent the attitude of the pull tab from becoming unstable. It is an object to provide an operating device for a latch device in a drawer.

[0008]

In order to achieve the above object, an operating device for a latch device in a drawer according to a first aspect of the present invention is a pulling piece which faces a pulling hole formed in a front plate of a drawer end plate. A pivot shaft attached to the front plate is rotatably mounted on the back face of the front plate, and is rotatable about the vertical axis on the back face of the front plate by an operating portion projecting radially outward from the pivot shaft. Latch of the drawer, which is configured to be rotated on the horizontal contact body of the latch body that is attached to the user and is biased in the engagement direction to rotate the latch body in the engagement release direction. In the apparatus, the pull tab piece is provided at a midway portion of a horizontal longitudinal rotation shaft, and a tip end portion of the rotation shaft is rotated to a round hole-shaped bearing portion projecting on a rear surface of a front plate of a drawer end plate. A rearward open state in which the middle part of the rotating shaft is movably supported and protrudes from the rear surface of the front plate. The pivot shaft is rotatably supported, while the pivot shaft is brought into contact with the back side of the front plate to prevent the pivot shaft from pivoting about its axis by a certain amount by the biasing force from the latch body side. The regulation means for doing so is provided.

Further, in the invention according to claim 2, the restricting means latches the contact force direction between the protrusion protruding radially outward from the rotating shaft and the stopper portion protruding on the rear surface of the front plate. It is configured so as to be substantially orthogonal to the direction of the force acting from the body side to the operating portion of the rotating shaft. Further, in the invention according to claim 3, in the operating device for the latch device in the drawer according to claim 2, the force direction acting from the latch body side to the operating portion of the rotating shaft is substantially orthogonal to the back surface of the front plate. The contact surface of the stopper portion with respect to the projection is set to be an upward surface that is substantially orthogonal to the rear surface of the front plate.

[0010]

According to the first aspect of the present invention, since the bearing portion that pivotally supports the tip end portion of the rotary shaft has a round hole shape, it suffices to insert the tip end portion into the bearing portion. Since the shaft supporting portion that rotatably supports the middle portion is opened rearward at a substantially right angle to the back surface of the front plate of the end plate, the rotation shaft long in the horizontal direction remains linear and It suffices to fit it into the shaft support so that it comes close to the back surface, and the work of mounting the rotating shaft is extremely simple.

Further, the rotating shaft is provided with a restricting means which is brought into contact with the rear surface side of the front plate so as not to rotate the rotating shaft around its axis by a predetermined amount or more by an urging force from the latch body side. Therefore, the pull tab piece exposed in the pull tab hole of the end plate does not freely rotate freely around the rotation axis, and the mounting posture of the pull tab body is stabilized. Further, in the invention according to claim 2, the restricting means includes a protrusion protruding radially outward from the rotating shaft and a stopper portion protruding from the rear surface of the front plate, and the protrusion plate and the stopper portion are provided. The contact force direction of
Since it is configured so as to be substantially orthogonal to the direction of the force that acts on the operation part of the rotating shaft from the side of the latch body, the operation of the rotating shaft from the side of the latch body is performed in a free state where the operator's finger is not caught on the pull tab. Only the moment of the rotating shaft due to the force acting on the portion acts, and the external force that translates the rotating shaft in the direction orthogonal to the axis does not act, and the attitude of the pulling body is stabilized.

In this case, as in the invention described in claim 3, the direction of the force acting from the latch body side to the operating portion of the rotating shaft is set so as to be substantially orthogonal to the back surface of the front plate, and the stopper for the projection body is set. When the contact surface of the part is set to be an upward surface that is substantially orthogonal to the back surface of the front plate, even if a finger hits the pull tab facing the inside of the pull hole in the depth direction of the drawer, the protrusion will stop. By contacting the upper surface of the portion, the rotation of the rotation shaft is blocked, and the blocking force is downward along the back surface of the front plate, and is perpendicular to the pressing direction by the finger.
The reaction force that the rotating shaft separates from the back surface of the front plate does not act,
This has the effect of eliminating rattling of the rotating shaft.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. FIG. 1 is a perspective view of the side of the drawer end plate, the pull member, and the latch body, and FIG. 2 is a bottom view of the end plate of the drawer. The drawer end plate 1 shown in FIG. 1 and FIG.
This is applied to a flat drawer having a low height, and the end plate 1 has a substantially flat plate-like front plate 1a and a peripheral frame plate 1b projecting rearward from the periphery thereof integrally formed by injection molding with a synthetic resin material. In the front plate 1a, a pull frame 2 having a horizontally long pull hole 2a is formed so that an upper half portion thereof bulges forward and a lower half portion thereof bulges backward. On the back surface of the front plate 1a, a plurality of reinforcing ribs 3 are integrally formed or fixed by an adhesive so as to be close to the inner surface of the peripheral frame plate 1b at appropriate intervals.

As shown by the chain double-dashed line in FIGS. 2 and 4, the back plate 5 made of a thin metal plate to which the front end of the box body 4 having an open upper surface in the drawer is fixed covers the back side of the end plate 1. The upper peripheral edge of the back plate 5 is fitted to the upper bent edge 1c of the peripheral frame plate 1b, and the rear plate 5 is inserted into the engaging hole 6a of the engaging piece 6 protruding below the peripheral frame plate 1b. The claws (not shown) projecting from the lower peripheral edge are locked.

The pull tab body 7 comprises a horizontally long rotary shaft 8 arranged substantially horizontally along the rear surface of the front plate 1a of the end plate 1 and a pull tab piece 9 having an upper end attached to the rotary shaft 8. Ribs 10, which are integrally formed of a resin material and project from the back surface of the front plate 1a, as shown in FIGS. 1, 2 and 4.
Of the ribs 11, one end of the rotary shaft 8 is rotatably inserted into the hole-shaped bearing portion 10a of one rib 10, and the other rib 11 is open rearward (opened in a direction substantially perpendicular to the back surface of the front plate 1a). An intermediate portion of the rotary shaft 8 is rotatably supported with respect to the (Ω-shaped) shaft supporting portion 11a, and the pull tab piece 9 is exposed to the pull hole 2a.

At the other end of the rotary shaft 8 of the pull tab body 7, a stepped actuating piece 12 for abutting one of two abutting bodies 22, 23 of a latch body 20 which will be described later.
Downwardly and integrally project. That is, L consisting of a vertical portion 15a and a horizontal portion 15b provided at the other end of the rotary shaft 8
A downward operating piece 12 is provided at the tip of the character-shaped relief connecting portion.

As shown in FIG. 1, FIG. 2, FIG. 4 and FIG. 5, the latch body 20 has engaging claws which are fitted in the engaging holes 14 of the cabinet body side plate 13 on the side surface of the round shaft-shaped body portion 21. The latch claw 24 provided with 24a is projected. An upper contact body 22 extending in a horizontal direction substantially orthogonal to the latch claw body 24 in a plan view of the latch body 20 is provided so as to project from a side surface of the body portion 21, and the tip end thereof is elastically pressed so as to press against the back surface of the front plate 1a. A curved flat plate-shaped spring body 25 is integrally projected.

At the lower end of the body portion 21, an L-shaped lower contact member 23 extending in parallel with the upper contact member 22 and having substantially the same length is integrally provided. As shown in FIG. 5, on the body portion 21, the latch claw body 24 of the latch body 20 biased by the spring body 25 is provided with the side plate 13 of the cabinet body.
A regulation stopper 26 is provided integrally with the rear surface of the front plate 1a so as not to rotate any more.

A rectangular hole-like fitting hole 28 is formed at the upper end of the body portion 21 to make the vertical size of the end plate 1 of the drawer large, and the latch body 20 is placed below the height position of the pull hole 2a. The base portion of the additional abutment body (not shown) when it is placed in the position can be fitted so as to rotate integrally. Then, as shown in FIGS. 1, 2, and 4 to 7,
The upper and lower portions of the body portion 21 of the latch body 20 are rotatably mounted by being sandwiched by a pair of upper and lower shaft support pieces 16 and 17 integrally projecting from the rear surface of the front plate 1a of the end plate 1, The protrusions 27, 27 projecting from the side surface prevent the falling. In addition, the lower abutment member 23 is attached to the lower shaft support piece 17.
The vertical shaft portion 23a is formed with a hole 17a through which the vertical shaft portion 23a is inserted downward.

Next, even if there is an urging force from the urging spring body 25 in the latch body 20, a regulation means for preventing the pivot shaft 8 of the pull tab body 7 from pivoting about its axis by a certain amount or more. A description will be given of the restriction means for restricting the pull tab body 7 from rotating more than a predetermined amount. As one example thereof, as shown in FIGS. 1 to 3, 8 and 9, a stopper plate 30 having a substantially horizontal upper surface is provided on the back surface of the front plate 1a so as to project rearward, while the rotation shaft 8 In the middle of the longitudinal direction, a projection 31 that is brought into contact with the upper surface of the stopper plate 30 is integrally provided radially outward. In this case, on the side facing the upper surface of the stopper plate 30, the rotating shaft 8 is sandwiched between the auxiliary ribs 32 so that the rotating shaft 8 does not float up from the stopper plate 30. As shown in FIGS. 3, 8 and 9, the body 31 is provided with rib portions 31a and is configured to have rigidity with respect to moment.

Further, the restricting means is rotated from the latch body 20 side in the contact direction B between the protrusion 31 protruding radially outward from the rotary shaft 8 and the stopper plate 30 protruding on the rear surface of the front plate. It is configured so as to be substantially orthogonal to the force acting direction A acting on the actuating portion 12 of the moving shaft. Specifically, the direction of the force acting from the latch body 20 side to the actuating portion 12 of the rotating shaft (see FIG.
Is set so as to be substantially orthogonal to the back surface of the front plate 1a, and the contact surface (upper surface) of the stopper plate 30 with respect to the protrusion 31 is an upward surface that is substantially orthogonal to the back surface of the front plate 1a. Is set to.

With the above structure, the upper and lower shaft support pieces 1
After mounting the latch body 20 between 6 and 17, the pull hole 2a
Rotate the pivot shaft 8 so that the pull tab 9 faces the brackets 10, 1
2, the vertical portion 15a of the relief connecting portion is disengaged from the tip of the upper contact body 22, as shown in FIG.
Since the horizontal portion 15b is arranged in a substantially parallel shape between the upper and lower abutting bodies 22, 23, the operating piece 12 on the rear surface side of the front plate 1a of the end plate 1 has the actuating piece 12 in the lower abutting body 2 of the latch body 20.
It comes in contact with 3 at right angles.

Therefore, when the operator pulls the pull tab 9 in the forward direction of the end plate, the rotary shaft 8 rotates around its axis, and the operating piece 12 approaches the back surface of the front plate 1a with its tip end side. So as to rotate in the direction of arrow C in FIG. As a result, the latch body 20 rotates against the urging force of the spring body 25, the upper and lower abutment bodies 22, 23 approach the back surface of the front plate 1a integrally, and the latch claw body 24 shows the arrow in FIG. By rotating in the D direction, it can be released from the engaging hole 14 of the cabinet body side plate 13 and released from the latch.

On the other hand, when the finger is released from the pull tab 9,
The rotating shaft 8 is urged to rotate in the direction of arrow A in FIG. 3 via the operating piece 12 by the urging force from the spring body 25, but when the protrusion 31 abuts on the upper surface of the stopper plate 30, The rotation shaft 8 does not rotate any further about its axis. Therefore, the posture of the pull tab piece 9 that protrudes from the rotary shaft 8 and faces the pull tab hole 2a is stable and stable. Further, since the bearing portion 10a that rotatably supports the tip portion of the rotating shaft 8 has a round hole shape, the tip portion may be inserted into the bearing portion 10a, and the middle portion of the rotating shaft 8 is rotatably supported. Since the supporting portion 11a for supporting and the space between the stopper plate 30 and the auxiliary rib 32 are opened rearward at substantially right angles to the back surface of the front plate 1a of the end plate 1, the rotary shaft 8 which is long in the horizontal direction is provided. Stay straight
The shaft support 11a is arranged so as to approach the back surface of the front plate 1a.
Also, it suffices to fit it into the stopper plate 30 and the auxiliary rib 32, and the work of mounting the rotating shaft 8 is extremely simple. Moreover,
Even if a finger hits the pull tab piece 9 exposed in the pull hole 2a in the depth direction of the drawer, the protrusion 31 abuts on the upper surface of the stopper plate 30 to prevent the pivot shaft 8 from pivoting. Since the blocking force is downward along the back surface of the front plate 1a and is perpendicular to the pressing direction of the finger, the reaction force that separates the rotation shaft 8 from the back surface of the front plate 1a does not act, and the rattling of the rotation shaft 8 is prevented. Will also disappear.

Since the upper surface of the rotary shaft 8 is supported by the auxiliary rib 32, the rotary shaft 8 after mounting does not float up, and the posture of the pull tab body 7 is extremely stable.

[Brief description of drawings]

FIG. 1 is a perspective view of each component shown on the back side of a drawer end plate.

FIG. 2 is a rear view of the drawer end plate.

FIG. 3 is an enlarged sectional view taken on line III-III of FIG. 2;

FIG. 4 is an enlarged sectional view taken along the line IV-IV of FIG.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is an enlarged sectional view taken along the line VII-VII of FIG.

FIG. 8 is a partially cutaway perspective view showing a stopper plate and a protrusion of a rotary shaft.

9 is a cross-sectional view taken along line IX-IX in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 End plate 1a Front plate 2 Puller frame 2a Puller hole 7 Puller body 8 Rotating shaft 9 Puller piece 10, 11 Rib 10a Bearing part 11a Shaft support part 12 Actuating piece 20 Latch body 21 Body part 23 Lower contact body 24 Latch claw body 25 Spring body 30 Stopper plate 31 Projection body 32 Auxiliary rib

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display area E05B 65/44 E05B 65/44 B

Claims (3)

[Claims] 1. A rotating shaft, to which a pulling piece facing a pulling hole formed in a front plate of a drawer end plate of a drawer is attached, is rotatably mounted on the rear surface of the front plate, and is outside the radius from the rotating shaft. In the operating portion projecting in the direction, the back surface of the front plate is rotatably mounted around the vertical axis and the horizontal contact body of the latch body biased in the engaging direction is pressed and rotated. In a drawer latch device configured to rotate the latch body in a disengagement direction, the pull tab is provided at a midway portion of a horizontal longitudinal rotation shaft, and a tip portion of the rotation shaft is provided. Is rotatably supported by a round hole-shaped bearing portion projecting on the rear surface of the front plate in the end plate of the drawer, and an intermediate portion of the rotating shaft is projected rearward on the rear surface of the front plate. While rotatably supported on the shaft support part, the rotation shaft is brought into contact with the back side of the front plate and is rotated by the urging force from the latch body side. An operating device for a latch device in a drawer, characterized in that a regulating means is provided to prevent the shaft from rotating about its axis more than a certain amount. 2. The regulating means sets a contact force direction between a protrusion protruding radially outward from a rotation shaft and a stopper portion protruding on a rear surface of the front plate from a latch body side to an operation portion of the rotation shaft. The operating device for the latch device in the drawer according to claim 1, wherein the operating device is configured to be substantially orthogonal to the acting force direction. 3. The direction of the force acting from the latch body side to the actuating portion of the rotary shaft is set so as to be substantially orthogonal to the rear surface of the front plate, and the contact surface of the stopper portion with respect to the protrusion is substantially orthogonal to the rear surface of the front plate. 3. The operating device for the latch device in the drawer according to claim 2, wherein the operating device is set so as to have an upward facing surface.