JPH0324783Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a latch device for locking a rotary opening/closing type door of furniture such as a locker or cabinet to the furniture body when the door is closed. .

[Conventional technology]

Hitherto, various latch devices for rotary doors for this type of furniture have been devised, in which a long latch rod is disposed on the inner surface of the open end side of the door approximately parallel to the rotation axis of the door. The latch rod is rotatably supported, and this latch rod is attached to a pull member that can be operated from the front of the door, while a latch claw that can be engaged and disengaged from the engaging part on the furniture body is attached according to the rotation of the latch rod. The latch rod is attached to the tip of the latch rod itself so that it can be rotated.

In this case, it is necessary to support the long latch rod so that it can freely rotate around its axis, and it is also necessary to attach the latch rod to the latch pawl and pull member so that it cannot fall off and can rotate integrally. be. In that case, it is preferable that the long latch rod be easily installed.

In response to this request, the applicant first
In Publication No. 136559, edge plates protruding toward the back side of the door are provided at the upper and lower ends of the open end side of the door, a support body for rotatably supporting the latch pawl is fixed near the edge plate, and a pull member is provided. (The latch lever) is associated with the joint body so as to rotate only when the door is opened, and includes an engagement hole drilled through the latch claw in the vertical direction, and a bottomed insertion hole drilled at the upper and lower ends of the joint body. is formed into a non-circular hole to match the latch rod with a non-circular cross section, so that the latch rod is non-rotatably engaged with the bottomed insertion hole in the joint body through the engagement hole in the latch pawl. On the other hand, when the latch rod insertion hole drilled in the upper and lower edge plates of the door is within the rotation range of the latch pawl by the latch lever, the latch pawl is out of phase with the engagement hole of the latch pawl, and the latch pawl by the latch lever is rotated. It has been proposed that when the latch is outside the rotation range, the latch claw is in phase with the engagement hole of the latch claw.

However, according to this prior art, both the latch pawl and the pull member are fitted to the latch rod so as to rotate integrally, so as the door rotates in the closing direction, the furniture body When the latch pawl makes a so-called kick-in engagement operation with the engaging portion, not only the latch pawl but also the latch rod and the pull member rotate, so there are many rotating parts, and the kick-in operation There was a problem that the movement was not light and that abnormal noises were likely to occur.

[The problem that the idea attempts to solve]

In order to solve the above problem, the actual development of the prior art
No. 57-202559, a latch pawl is loosely fitted into the upper and lower ends of a long latch rod, and the latch pawl is spring-biased in a direction toward the main body engaging portion, while the pressing body fixed to the latch rod is When the protrusion faces the abutting portion of the latch pawl and the latch rod is rotated in the disengagement direction via the pull member, the latch pawl is forcibly rotated in the disengagement direction by the pressing body. However, in this technology, the latch claws are attached to the upper and lower ends of a long latch rod, and the latch claws are attached so as to be rotatably supported on a bearing provided on the inner surface of the door. There was a problem in that the assembly work of the latch device was difficult.

The present invention aims to solve these conventional technical problems all at once.

[Means for Solving the Problem] In order to achieve this object, in the present invention, one side edge of the door is rotatably pivoted to the front surface of the furniture body, and a latch rod is provided on the inner surface of the open end side of the door. is arranged substantially parallel to the pivot axis of the door, and the latch rod is rotated about its axis via a pull member that can be rotated from the front side of the door, hand,
In a door latch device configured to operate a latch pawl for engaging and disengaging from a furniture body in the disengagement direction, a support bracket for supporting the latch pawl is fixed to the inside near the edge plate of the door. , a bearing bracket for rotatably supporting the latch rod is removably fixed on the inner surface of the door that is appropriately spaced from the support bracket on the side closer to the pull member, and the support bracket and the bearing bracket are connected to each other. An insertion member that can be inserted into and removed from the latch pawl through the through hole of the support bracket, and a connecting member that can be inserted and removed from the insertion member are arranged concentrically with the axis of the latch rod. A latch pawl that rotates integrally with the insertion member is always biased by a spring in the direction of engagement with the furniture body, and a door opening operation is provided between the insertion member and the connecting member. An eccentric abutment piece is provided which rotates the latch pawl in the disengagement direction when the latch pawl engages the furniture body, and prevents the connecting member from rotating when the latch pawl engages the furniture body with kicking. The pull member has a bottomed attachment hole into which a latch rod connecting the two is removably and irremovably inserted.

[Functions and effects of the invention]

Since the present invention has the above-described configuration, when the latch rod is rotated in the disengagement direction via the pull member from the closed state, the latch lever is rotated via the eccentric contact piece between the connecting member and the insertion member. The insertion member and the latch pawl are integrally rotated in the same direction to release the engagement with the main body and the door can be opened. Conversely, when closing the door from the open state, the latch pawl engages in the locking action. Therefore, even if the connecting member rotates, the connecting member does not rotate relative to the inserting member that rotates integrally with the connecting member, so the latch rod and pull member attached to this connecting member do not rotate at all, and the connecting member does not rotate at all. Only the member and the latch pawl rotate independently into engagement with the body.

Therefore, the latch claw operates extremely easily and engages with the furniture body smoothly and reliably. Furthermore, unlike when the latch pawl and the latch are fixed to each other, there is no frictional noise from the latch rod shaft when the door is closed, and there is no impact noise caused by the sudden return rotation of the pull member. Sound can be extremely reduced.

When assembling this latch device, the insertion member can be inserted and connected to the latch pawl through the through hole of the support bracket, so the installation position of the latch pawl is determined and the connection between the insertion member and the connecting member is fixed. The condition can be determined almost at the same time as the bearing bracket is installed on the inner surface of the door, and the latch rod can be installed on the connecting member and the pull member at approximately the same time as the bearing bracket. By inserting each part into each other along the same lines, the parts can be assembled in an orderly manner.

Therefore, the assembly is extremely simple by simply fitting the parts in sequence, and at the same time, by changing the attachment angle between the latch pawl and the insertion member, the play rotation angle of the connecting member relative to the insertion member can be adjusted to a larger or smaller degree. Since the rotation angle of the latch rod and the rotation angle of the latch pawl can be changed as appropriate, the engagement of the latch pawl with the main body can be made shallow or deep, and one device can be used for various types of furniture.

〔Example〕

Next, the present invention will be specifically explained based on an example in which the present invention is applied to a rocker.

In the figure, 1 is a rocker body made of a thin metal plate,
Reference numeral 2 indicates a horizontally rotatable door whose one side end is pivotally connected to the front side of the rocker body 1 by a pair of upper and lower hinges 3, 3, and the door 2 has four side edges around it in a U-shape toward the back side. It is formed into a hollow shape by a top plate 4 which is bent in a manner similar to the above, and a back plate 5 which is fitted and fixed to the inside of the bent edge 4' of the top plate 4 so as to be parallel to the top plate 4.

Inside the hollow portion on the open end side of the door 2, a pair of upper and lower latch rods 6 and 7 are arranged substantially parallel to the rotation axis of the door 2 (the axis of the hinge 3) and coaxially with each other. The upper and lower latch rods 6 and 7 are rotatably supported by bearing brackets 8 and 8', respectively, and the upper end of the upper latch rod 6 and the lower end of the lower latch rod 7 face latch mechanisms 21 and 30, which will be described later. Let it happen.

These bearing brackets 8 and 8' are attached to brackets 36 and 3 on the back side of the front plate 4 of the door 2 with screws 35, respectively.
It can be detachably attached to and fixed to 6.

the upper and lower latch rods 6 in the hollow part of the door 2;
A pull frame 11 having a pull hole 10 opening on the front side of the door is attached to the part near 7, and the pull frame 11 is made up of a front plate 4 and a cover body 9 that closes a rectangular hole 12 made in the back plate 5. Clamp and fix.

The handle frame 11 is provided with the upper and lower latch rods 6, 7.
A joint rod 1 extending in the axial direction at a position on the axis of
The joint rod 13 is integrally provided with a pull member 14 extending into the pull hole 10, and the lower end of the upper latch rod 6 and the upper end of the lower latch rod 7 cross each other. The connecting portions 6' and 7' are formed by forming the surfaces into non-circular cross sections such as squares or ellipses;
At both upper and lower ends of the joint rod 13, insertion holes 15 and 16, which are bottomed mounting holes with the same non-circular cross-sectional shape as the connecting portions 6' and 7' of the latch rods 6 and 7, are bored. In both insertion holes 16, 15, connecting portion 6',
By removably inserting the latch rod 7', the latch rods 6, 7 and the joint rod 13 are removably connected so that they can rotate together.

At this time, the depth (h1) of the upper insertion hole 15
is appropriately shallower than the depth (h2) of a fitting hole 25'' which is a bottomed attachment hole for a connecting member 25 in the upper latch mechanism 21, which will be described later, and the lower insertion hole 1
The depth (h3) of 6 is set to be appropriately larger than the depth (h4) of a fitting hole 33'' which is a bottomed attachment hole for a connecting member 33 in a lower latch mechanism 30, which will also be described later.

Furthermore, a pair of upper and lower levers 1 are attached to the joint rod 13.
7, 17 are integrally provided, and both levers 17, 17
Tension springs 18, 18 are installed between the tip of the handle member 14 and the handle frame 11 or the back plate 5 of the door 2.
is always urged in the direction of the back plate 5. At this time, the stopper 13' is projected from the joint rod 13 (see FIG. 5), and the stopper 13' is attached to the handle frame 11.
Alternatively, the rotating posture of the pull member 14 is maintained at a predetermined position by contacting the back surface of the front plate 4 or the like.

Reference numeral 19 is a cylinder lock for locking the door 2 in the closed state, and the lock piece 19' is formed in a bifurcated shape and moves forward and backward when the lock is unlocked from the front of the door.
Rotation of the latch rods 6, 7 is prevented by engaging and disengaging the tip of the bar 19' from the levers 17, 17.

Latch pawls 23, 3 are provided above the upper latch rod 6 and below the lower latch rod 7 in the hollow part of the door.
1. Insert members 24, 32 and connecting members 25, 33
Latch mechanisms 21 and 30 are provided, respectively.

This latch mechanism will be explained based on the upper latch mechanism 21 shown in FIGS. 6-8.

At the base of the connecting member 25, a fitting hole 25'', which is a bottomed attachment hole with a non-circular shape such as a rectangular cross section, is vertically bored, and the upper end connecting portion 6'' of the upper latch rod 6 is formed in the same direction. By forming it into a cross-sectional shape and fitting it into the fitting hole 25'', the upper latch rod 6 and the connecting member 25 are configured to rotate together.

In this case, as described above, the depth dimension (h2) of the fitting hole 25'' in the upper connecting member 25 is the depth dimension (h1) of the upper insertion hole 15 in the joint rod 13.
The upper end connecting portion 6'' of the latch rod 6 is formed so as to have an appropriate depth, and the upper end connecting portion 6'' of the latch rod 6 is formed so as to be deeper than the fitting hole 2 of the connecting member 25.
The depth dimension (X1) that fits into the latch rod 6
From the sum of the depth dimension (h1) at which the lower end connecting portion 6' is inserted into the upper insertion hole 15 of the joint rod 13,
The depth dimension (h2) of the fitting hole 25'' is increased (h2
> h1 + On the other hand, insertion member 2
4 and the connecting member 25 is inserted into this insertion member 24, and with the three members connected, the bearing bracket 8 is fixed and positioned in advance to the top plate 4, and then the latch rod 6 is pushed against its own elasticity. It is possible to insert the connector while bending it slightly and connect it to the joint rod 13.

On the other hand, the latch claw 23 has an inverted L shape when viewed from the side, with a claw portion 23b protruding from the upper end of the base body 23a in a substantially horizontal direction.
Form into a letter shape. An inclined surface 23d is formed on the claw portion 23b, and the claw portion 23b is made to protrude toward the furniture body engaging portion 1' from a slit 2' formed on the back surface of the door.

Further, a round hole 23c is vertically bored in the lower part of the base body 23a, and the cylindrical upper end 24d of the insertion member 24 is fitted into the round hole 23c, and the screw 26 is screwed in from the outside to fix it. It is configured so that the insertion member 24 rotates integrally with the insertion member 24. At this time,
The cylindrical tip 24a of the insertion member 24 is inserted into the through hole 27a of the support bracket 27 and supported rotatably, and a spring 28 is mounted between the latch pawl 23 and the top plate 4, and the latch pawl 23 is biased so that it can always engage with the main body engaging portion 1' (see FIG. 8).
For this biasing, the latch pawl 23 and the support bracket 27 or the insertion member 24 and the support bracket 27 are used.
A torsion spring may be interposed between the two.

An engagement hole 24b having a fan-shaped groove 24c in plan view is formed in the base of the insertion member 24, and the tip of the connecting member 25 is formed into a columnar portion 25b. The abutment piece 25c extends along the axial direction of the latch rod 6 so as to be appropriately eccentric from the axis of the latch rod 6, and the abutment piece 25c is formed into a cylindrical shape with a loose fit in the fan-shaped groove 24c. Part 25
b into the engagement hole 24b. This contact piece 25
c and the fan-shaped groove 24c are defined by the position A in which the latch pawl 23 engages with the main body 1 as shown by the dashed line in FIG.
When the abutment piece 24c is in the fan-shaped groove 24c, the inner end face 24 facing the latch release direction
c′, and the latch pawl 23 and the insertion member 2
Even if only the inner end surface 24C'' on the side opposite to the inner end surface 24c' of the fan-shaped groove 24c is rotated by a certain angle α from the engaging posture A to the disengaging posture B, the inner end surface 24C'' on the opposite side It is connected so as not to come into contact with the piece 25c.

In other words, with the handle member 14 in the state D where the hand is removed, the latch rod 6 does not rotate, and only the latch pawl 23 and the insertion member 24 rotate in either direction A or B. It is constructed so that it can be easily used.

In the above configuration, in the closed state A in which the latch pawl 23 is engaged with the main body 1, when the pull member 14 is pulled in the door front direction (direction C), the latch rod 6
The connecting member 25 integrally rotates, and as a result, the abutment piece 25c of the connecting member 25 comes into contact with the inner end surface 24c' of the fan-shaped groove 24c in the insertion member 24, and the insertion member 24 Rotate in direction B,
As a result, the latch pawl 23 is disengaged from the main body 1 and the door is opened. When the door is opened and a finger is released from the pull member 14, the latch rod 6 and the latch pawl 23 are returned to their original positions by the spring 18 and the spring 28, respectively.

Conversely, when the door 2 is opened and the door is closed by pressing any part on the surface of the door 2, the latch claw 23 will move in the B direction once the inclined surface 23d of the claw portion 23b comes into contact with the main body engaging portion 1'. After the escape rotation, so-called kick-in engagement is performed in which the engagement portion 1' is engaged with the engaging portion 1'.
At the time of escape rotation in the direction, the inner end surface 24c'' of the fan-shaped groove 23c in the insertion member 25
5, the connecting member 25 and the latch rod 6 do not rotate at all, and only the latch pawl 23 and the inserting member 24 rotate independently.

Next, the assembly of the above-mentioned latch mechanism 21 will be explained. First, the latch pawl 23 is set on a predetermined position on the support bracket 27 of the door 2, and then the cylindrical tip portion 24 of the insertion member 24 is inserted into the round hole 23c.
a through the through hole 27a of the support bracket 27, and further fit the cylindrical portion 25b of the connecting member 25 into the engagement hole 24b of the insertion member 24 from below.

Next, the upper end connection part 6'' of the upper latch rod 6 is
After passing through the bearing hole 8a of the bearing bracket 8,
The connecting member 25 is fully inserted into the fitting hole 25'' from below, and the lower end connecting portion 6' of the latch rod 6 is dropped into the upper insertion hole 15 of the joint rod 13. At this time, the connecting member in the upper latch mechanism 21 2
The fitting hole 25″ of No. 5 is the upper insertion hole 1 of the joint rod 13.
Since the latch rod is deeper than 5, even after the latch mechanism 21 and the joint rod 13 are fixedly set on the door, only the latch rod 6 can be attached and detached and will not fall out.

Then, attach the latch pawl 23 to the insertion member 24 with the screw 2.
6. After fixing with 6 locks, a spring 28 may be installed between the latch pawl 23 and the top plate 4. When fixing this latch claw 23 to the insertion member 24, the claw portion 23b of the latch claw 23 and the fan-shaped groove 25 of the insertion member 25 are connected to each other.
When the relative phase in plan view with respect to c is shifted and fixed as appropriate, the one side inner end surface 2 of the fan-shaped groove 24c
3' and the contact piece 25c can be set to be appropriately spaced apart from each other when the door is closed, and in this way, the rotation angle α of the latch pawl 23 can be made smaller than the rotation angle θ of the pull member 14. .

The bearing bracket dot 8 may be fixed to the top plate 4 after each member is set, or it may be fixed at the stage when the latch pawl 23, the insertion member 24, and the connecting member 25 are set in the predetermined positions. .

The above explanation has been about the upper latch mechanism 21, but the lower latch mechanism 30 has the following features: the direction is upside down, and the depth (h4) of the fitting hole 33'' of the connecting member 33 is the lower part of the joint rod 13. The only difference is that the depth is shallower than the depth (h3) of the insertion hole 16, and the other points are the same.

In this case, the depth dimension (h4) at which the lower end connecting portion 7'' of the lower latch rod 7 fits into the fitting hole 33'' of the connecting member 33, and the upper end connecting portion 7' of the latch rod 7 at the joint rod 13. If the depth dimension (h3) of the fitting hole 33'' is set to be larger than the sum of the depth dimension (X2) for fitting into the lower insertion hole 16 (h3>h4+X2) (see Fig. 3), When the length of the latch rod 7 is much larger than the above-mentioned dimensions as in a normal locking cabinet, the insertion member 32 is inserted into the latch pawl 31, and the insertion member 32, and with the three members connected, the bearing bracket 8' is fixed and positioned in advance to the top plate 4, and then the latch rod 7 is inserted while being slightly curved against its own elasticity.
It becomes possible to connect to the joint rod 13.

FIG. 9 shows an example in which the eccentric abutting piece 25' of the connecting member 25 is engaged with and disengaged from the engaging piece 24' protruding from the outer end surface of the insertion member 24. Its operation is similar to that of the previous embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view of the locker, Fig. 2 is a rear view of the door, and Fig. 3 is a rear view of the door.
4 is a partially enlarged view of FIG. 2, FIG. 5 is a plan sectional view of FIG. 4, FIG. 6 is a sectional view of FIG. 2, and FIG. Figure 6 -
8 is an exploded perspective view of the latch mechanism 21, and FIG. 9 is a diagram of another embodiment. 1... Locker body, 2... Door, 6, 7... Latch rod, 13... Joint rod, 14... Pull member, 2
1, 30... Latch mechanism, 23, 31... Latch claw, 24, 32... Insert member, 24c... Fan-shaped groove, 25, 33... Connecting member, 25c... Contact piece, 25''... Fitting hole.

Claims (1)

[Scope of utility model registration request] One side edge of the door is rotatably pivoted to the front of the furniture body, and a latch rod is arranged on the inner surface of the open end side of the door approximately parallel to the pivot axis of the door, so that it can be rotated from the front side of the door. The latch rod is rotated about its axis via a pull member configured to be movable, and a latch pawl for engaging and disengaging from the furniture body is actuated in the disengagement direction via the latch lever. In the door latch device configured as above, a support bracket for supporting the latch claw is fixed to the inner side near the edge plate of the door, and the inner surface of the door is appropriately spaced from the support bracket on the side closer to the pull member. is configured to removably fix a bearing bracket that rotatably supports the latch rod, and a through hole in the support bracket is provided between the support bracket and the bearing bracket with respect to the latch pawl. an insertion member that can be inserted into and removed from the insertion member; and a connecting member that can be inserted into and removed from the insertion member, which are arranged concentrically with the axis of the latch rod;
A latch pawl that rotates integrally with the insertion member is always biased by a spring in the direction of engagement with the furniture body, and the latch pawl is placed between the insertion member and the connecting member when the door is opened. The connecting member and the pull member are provided with an eccentric abutment piece that is rotatably driven in the disengagement direction and configured so that the connecting member does not rotate when the latch claw engages the furniture body by kicking the latch claw into the furniture body. A latch device for a door in furniture, etc., characterized by having a bottomed mounting hole into which a latch rod connecting the two is removably and irremovably inserted.