JP4994893B2 - Door latch device in furniture - Google Patents

Description

  The present invention relates to a door latch device in furniture.

  In a conventional door latch device in furniture, when a user grips a handle (lever) provided on the front of the door, the handle rotates and presses a pressing piece of a rotating cylinder provided on the back of the door. When the moving cylinder is rotated to release the latch claw and the hand is released from the handle, the biasing force of a pair of springs stretched at a predetermined angle between the fixed piece of the rotating cylinder and the fixed piece provided on the back of the door In some cases, the rotating cylinder is reversely rotated to return to the original state and the latch claw is engaged with the engaging piece (see, for example, Patent Document 1).

JP-A-9-125787 (page 3, FIG. 3)

  However, in Patent Document 1, a pair of springs must be inclined at a predetermined angle within the mounting space on the back surface of the door, and the mounting work is difficult, and the spring is pressed against the rotating cylinder. There is a problem in that the size of the entire latch device is increased because it is attached to the fixed pieces provided at two positions with the pieces interposed therebetween. Further, since the inclination angle of the spring changes with respect to the rotation angle of the rotating cylinder, there is a possibility that the spring resistance becomes non-linear and the grip operation is difficult to grasp.

  The present invention has been made paying attention to such problems, and it is relatively easy to mount a spring, the size of the device itself can be made compact, and the latch of the door in the furniture that allows smooth handle operation. An object is to provide an apparatus.

In order to solve the above-mentioned problem, a door latch device in furniture according to claim 1 of the present invention,
A latch rod having a latch claw that can be engaged with an engagement portion provided on the furniture main body is engaged with the engagement portion by a biasing spring on the back surface of the door pivotally attached to the furniture main body. A latch claw that supports the latch rod against the urging force of the urging spring in a biased state and is linked to a handle that slides in the front-rear direction with respect to the door provided on the surface side of the door. In the door latch device in the furniture in which the door is opened by rotating so as to release from the engaging portion,
A slide member provided on the rear side of the door that moves back and forth following the front and rear sliding of the handle is connected to the rear portion of the handle, and the latch rod is arranged eccentrically from the center axis of the slide member, One end of the urging spring stretched in the forward / backward movement direction of the slide member abuts on a rotating piece provided on the latch rod, and the other end is supported on the back surface of the door, and forward of the slide member. Thus, the latch rod is rotated through the rotating piece against the biasing spring force.
According to this feature, the urging spring is stretched in the forward / backward movement direction of the slide member, so that the mounting operation is easy, and the rotating piece supports the urging spring on the latch rod, and the latch Since it can bear the action of rotating the heel, it can be made compact, and the spring resistance increases in proportion to the amount of forward movement of the handle, so that the handle feel can be improved.

The door latch device for furniture according to claim 2 of the present invention is the door latch device for furniture according to claim 1,
A rib protruding forward along the longitudinal direction is formed on the front surface of the slide member.
According to this feature, bending due to bending accumulated in the slide member due to sliding in the front-rear direction of the handle due to long-term use can be suppressed.

The door latch device for furniture according to claim 3 of the present invention is the door latch device for furniture according to claim 1 or 2,
A plurality of the rotating pieces are provided on the latch rod.
According to this feature, since the plurality of rotating pieces are provided on the latch rod, the rotational force can be evenly transmitted to the latch rod and the rotation of the latch rod can be stabilized.

The door latch device for furniture according to claim 4 of the present invention is the door latch device for furniture according to any one of claims 1 to 3,
At least a part of the urging spring in the longitudinal direction is in contact with or supported in close proximity to the longitudinal movement of the slide member, and the end is engaged and supported in a recess formed in the door. .
According to this feature, a part of the biasing spring is abutted against or supported close to the movement of the slide member in the front-rear direction, so that the posture of the biasing spring can be stabilized and a recess is formed in the door. Since the urging spring can be held only with a small number of parts, the number of parts can be reduced and the assembly is easy.

  BEST MODE FOR CARRYING OUT THE INVENTION A best mode for carrying out a door latch device in furniture according to the present invention will be described below based on an embodiment.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a perspective view of a cabinet to which a door latch device in furniture of the present invention is applied, and FIG. 2 is a main part on the back side of a glass door. 3 is an enlarged rear view of the glass door showing the latch device, and FIG. 4 is an A view of the latch device in FIG. 3 when the latch claw is engaged with the engaging portion. FIG. 5 is a vertical side view of the latch device, and FIG. 5 is a vertical side view of the latch device showing the movement of the latch device when the glass door is opened when the latch claw is detached from the engaging portion. Fig. 7 is a perspective view showing an engagement state between the latch claw and the engagement portion above the latch device, and Fig. 7A is a BB end surface showing the slide member and the coil spring in Fig. 3 when the glass door is closed. FIG. 7B is a diagram in FIG. 3 when the handle is slid forward. It is a BB end view showing a ride member and a coil spring, FIG. 8A is a CC end view in FIG. 3 showing a state in which the glass door is unlocked, and FIG. It is CC end view in FIG. 3 which shows the state by which the glass door was locked. In the following description, the left side of FIGS. 4 and 5 is the front side of the latch device, and the upper side of FIGS. 7 and 8 is the front side of the latch device.

  Reference numeral 1 in FIG. 1 is a cabinet as a furniture main body in the present embodiment, and the cabinet 1 has a shelf plate 2 vertically connected to the inside of the cabinet 1. A pair of double door glass doors 3 and 3 'are attached as doors in the present embodiment. As for the glass doors 3 and 3 ′, one glass door 3 will be described for the same configuration.

  The glass door 3 is pivotally attached to the front end thereof by a hinge (not shown) so as to be rotatable in the front direction. The glass door 3 is attached to a glass plate 4 having a rectangular shape in front view as a glass portion, and a glass plate 4. It consists of panels 5 and 5 'attached from the left and right.

  Since the glass plate 4 is attached to the glass door 3, the contents in the cabinet 1 can be visually recognized even when the glass door 3 is closed. A handle 6 for opening and closing the cabinet 1 is attached to the front side of the panels 5 and 5 located in the center.

  The latch device 7 of the present invention will be described. As shown in FIGS. 2 and 3, a latch rod 8 is provided on the back surface of the panel 5 so as to extend vertically along the longitudinal direction of the panel 5. The latch rod 8 is composed of a rotating tube 8a having a substantially cylindrical shape and latch rods 8b and 8c integrally coupled to the rotating tube 8a. A substantially L-shaped support member 9a, 9b as a fixture in the present embodiment is rotatably provided.

  Further, fitting holes 8d are formed on the upper and lower surfaces of the rotating tube 8a, and fitting protrusions 8e are formed on the lower end of the latch bar 8b and the upper end of the latch bar 8c, respectively (see FIG. 6). ). Then, the latching rod 8b is fitted into the fitting holes 8d, 8d formed on the upper and lower surfaces of the rotating tube 8a, and the fitting protrusions 8e, 8e of the latching rod 8c are fitted from below, respectively. The rods 8b and 8c are integrated.

  Further, as shown in FIG. 6, a latch claw 10a is provided at the upper end of the latch bar 8b. The latch claw 10a is engaged with an engaging portion 11a attached to the lower surface of the top plate 12 of the cabinet 1 as shown in FIG. It is attached so that it can be engaged and disengaged. The lower end of the latch bar 8c and the upper surface of the bottom plate 13 of the cabinet 1 have the same configuration by the latch claw 10b and the engaging portion 11b. When the glass door 3 is closed, the latch claws 10a and 10b are engaged with the engaging portions 11a and 11b. The glass doors 3 are not easily opened by being engaged by the biasing springs.

  Furthermore, since the latch rod 8 extends in the vertical direction on the back side of the panel 5 and is concealed from the front view by the panel 5, it is a glass door 3 constituted by the glass plate 4. However, the latch rod 8 can be attached without deteriorating the appearance.

  As shown in FIGS. 2 and 4, from the vicinity of the center of the latch rod 8, more specifically from the circumferential surface of the rotating tube 8a, the two first rotating pieces 14, 14 are on the left side as viewed from the back (see FIG. 2). ). Further, on the back surface of the panel 5, recessed holes 15 and 15 are formed as recessed portions in the present embodiment so as to face the first rotating pieces 14 and 14. One end of a coil spring 16, 16 as an urging spring in the present embodiment is engaged and supported in the concave holes 15, and the other end is connected to the first rotating piece 14, 14 by the first rotating member. The pieces 14 and 14 are attached so as to be biased in a direction away from the back surface of the panel 5 (see FIG. 7A).

  Due to the biasing of the coil springs 16 and 16, the latch rod 8 is pivotally supported in a state where the latching claws 10a and 10b are biased and engaged so as not to be easily detached from the engaging portions 11a and 11b.

  Further, on the left side of the rotating tube 8a as viewed from the back, a slide member 17 having a rectangular shape when viewed from the front and having upper and lower end surfaces extending forward and formed on the fitting pieces 17a and 17b is substantially the same as the rotating tube 8a. It is provided so that it may become parallel, and the front side is arrange | positioned so that the front-end | tip of the 1st rotation pieces 14 and 14 may contact | abut or can contact | abut. The outer surfaces of the fitting pieces 17a and 17b are flat surfaces that can be slidably contacted with a sliding contact piece 22b of the sliding assisting tool 22 described later.

  As shown in FIG. 7A, a rib 17 c is formed to project from the upper side to the lower side of the slide member 17 at the center of the slide member 17 on the side facing the panel 5. At this time, side portions of the coil springs 16 and 16 urging the first rotating pieces 14 and 14 are close to the side surfaces of the ribs 17c. However, the coil springs 16 and 16 may be brought into contact with each other so that they can be expanded and contracted along the side surface of the rib 17c. As described above, if the coil springs 16 and 16 are disposed in contact with or close to the side portions, the postures of the coil springs 16 and 16 can be stably operated when the coil springs 16 and 16 expand and contract.

  Further, as shown in FIG. 4, the panel 5 has mounting holes 18, 18 penetratingly formed at positions facing the upper and lower ends of the slide member 17. Attached recesses 19, 19 are formed. Bearing bushes 21 and 21 as guide members in this embodiment are inserted and held in the mounting holes 18 and 18 from the front side of the panel 5.

  The bearing bushes 21 are formed at the rear end of the rectangular bush portion 21a as a box-shaped portion in the present embodiment, which is integrally formed at the tip and protrudes from the front of the panel 5, and the stepped recesses 19, 19 Are formed of a flexible claw portion 21c that is elastically engaged with each other, and a cylindrical portion 21b that connects the square tube portion 21a and the flexible claw portion 21c. A sleeve 23 that slides and supports a connecting shaft 24 (described later) in the front-rear direction is inserted into the inner surface of the cylindrical portion 21b.

  Further, on the outer peripheral edge of the stepped recesses 19, 19, fitting recesses 20, 20 are further formed at the rear end of the stepped recesses 19, 19. Sliding aids 22 and 22 are fitted.

  These sliding aids 22 are configured by a support portion 22a that is fitted into the fitting recess 20 and screwed to the back surface of the panel 5 by a screw 32, and a sliding contact piece 22b that extends rearward. A flat slidable contact surface 22c slidably in contact with the fitting pieces 17a and 17a of the slide member 17 is parallel to the inner surface of the slidable contact piece 22b facing the end surface side of the slide member 17. It is formed as follows.

  Further, a sliding hole 22d having substantially the same diameter as that of the sleeve 23 is formed in the center of the support portion 22a so that the sleeve 23 can be inserted, and the slide member 17 is fitted in the vicinity of the sliding contact piece 22b of the support portion 22a. A fitting groove 22e into which the mating pieces 17a and 17b are fitted is formed.

  In addition, the upper and lower rear end portions of the handle 6 formed in a U-shape in a rear view in a side view are fitted into the rectangular tube portions 21b and 21b of the bearing bushes 21 and 21, respectively. Further, the connecting shafts 24 and 24 are inserted into the sleeves 23 and 23 in the rectangular tube portions 21 b and 21 b from the upper and lower ends of the slide member 17, and the ends of the connecting shafts 24 and 24 are screwed to the upper and lower ends of the handle 6. Is done. Thereby, the handle 6 and the slide member 17 are connected to each other so as not to move relative to each other.

  Next, the operation of the latch device 7 will be described. In FIG. 4 in which the latch claws 10a and 10b are engaged with the engaging portions 11a and 11b, the user pulls the handle 6 forward as indicated by the white arrow, so that the slide member is connected via the connecting shaft 24. 17, the fitting pieces 17a and 17b slide forward while sliding in contact with the sliding contact surfaces 22c and 22c of the sliding aids 22 and 22, resulting in the state shown in FIG.

  At this time, the rectangular tube portions 21a and 21a of the bearing bushes 21 and 21 guide the upper and lower rear ends of the handle 6 so as to be slidable back and forth, and are connected via sleeves 23 and 23 in the cylindrical portions 21b and 21b. The shafts 24 and 24 are guided so as to be slidable back and forth.

  As the slide member 17 slides forward, the coil springs 16 and 16 move from the biased state shown in FIG. 7A to the front of the slide member 17 as shown in FIG. 7B. While being in a compressed state that resists sliding, the first rotating pieces 14 and 14 are converted into the rotation of the latch rod 8 by rotating the angle θ (approximately 30 degrees). Accordingly, the upper and lower latch bars 8a and 8b are rotated so that the latch claws 10a and 10b are detached from the engaging portions 11a and 11b, and the glass door 3 can be opened. The angle at which the latch claws 10a and 10b are released is not limited to 30 degrees, and can be set to an arbitrary angle.

  The tips of the latch claws 10a and 10b and the engaging portions 11a and 11b have a substantially arc shape. When the glass door 3 is closed, the user holds the handle 6 and pushes the glass door 3 or directly the glass door 3 Is pushed, the latch claws 10a, 10b and the tips of the engaging portions 11a, 11b are brought into contact with each other, so that the latch rod 8 rotates against the urging force of the coil springs 16, 16, and then the coil springs 16, 16 The latch claws 10a and 10b are automatically engaged with the engaging portions 11a and 11b by the urging force, and the glass door 3 is closed.

  Next, the locking device 25 as a locking / unlocking device in this embodiment which is a part of the latch device 7 will be described. As shown in FIGS. 3 and 4, an opening is provided below the slide member 17 on the back surface of the panel 5. 26 is formed, and a lock device 25 provided with a slide plate 25a as a plate body in this embodiment that can slide up and down is attached below the opening 26.

  This locking device 25 is inserted and attached through a through hole 27 formed through from the front surface to the back surface of the panel 5, and has a key cylinder 25c through which a key 28 is inserted and rotated on the front side of the panel 5. On the back side of the panel 5, there is a slide plate 25a that can slide up and down, and a slide plate operating portion 25b as a plate body operating portion in this embodiment that slides the slide plate 25a up and down. The slide member 17, the opening 26, and the slide plate actuating portion 25 b are arranged in a straight line on the longitudinal extension of the slide member 17 and close to each other.

  The key cylinder 25c of the locking device 25 and the slide plate operating portion 25b operate in conjunction with each other. Specifically, first, the user inserts the key 28 into the key cylinder 25c, and further rotates the key 28 in the left-right direction when viewed from the front. By this rotation, the slide plate operating portion 25b slides the slide plate 25a up and down, and the opening 26 is closed by moving the slide plate 25a upward.

  Further, in the vicinity of the opening 26, a second rotating piece 29 extends from the vicinity of the support member 9b, which is the lower part of the rotating tube 8a, to the left, and is latched when the glass door 3 is opened. The second rotating piece 29 is configured to be fitted into the opening 26 in order to allow the collar 8 to rotate.

  By doing so, as shown in FIG. 8A, in the unlocked state where the slide plate 25a does not close the opening 26, the slide member 17 is linked to the forward movement of the handle 6, and the slide member When the rotating tube 8a rotates when the first rotating pieces 14 and 14 are pressed forward by 17, the second rotating piece 29 extending from the rotating tube 8a is formed in the opening 26. By inserting, the latch rod 8 is allowed to rotate. Thereby, the latch claws 10a and 10b attached to the upper and lower ends of the latch rod 8 are detached from the engaging portions 11a and 11b, and the glass door 3 is opened.

  Further, as shown in FIG. 8B, in the locked state where the slide plate 25 a closes the opening 26 by the operation of the key 28, the slide member 17 is linked to the handle 6 and the first rotating piece 14. , 14 is pushed forward, the second rotating piece 29 cannot be fitted into the opening 26 and comes into contact with the slide plate 25a. Therefore, the rotation of the latch rod 8 is restricted, and the latch claw 10a. , 10b cannot be separated from the engaging portions 11a, 11b, thereby preventing the glass door 3 from being opened. As described above, since the coil spring 16 is stretched in the forward / backward movement direction of the slide member 17, the mounting operation is easy, and the rotating piece 14 supports the coil spring 8 on the latch rod 8, Since the latch rod 8 can be rotated, the structure can be made compact, and the spring resistance increases in proportion to the amount of movement of the handle 6 forward, so that the operation feeling of the handle 6 can be improved. .

  Further, bending due to bending accumulated in the slide member 17 due to sliding of the handle 6 in the front-rear direction due to long-term use can be suppressed.

  Further, since the two rotary pieces 14 are provided on the latch rod 8, the rotational force can be evenly transmitted to the latch rod 8 and the rotation of the latch rod 8 can be stabilized.

  Further, a part of the coil spring 8 is abutted against or supported in close proximity to the movement of the slide member 17 in the front-rear direction, so that the posture of the coil spring 8 can be stabilized and only the concave hole 15 is formed in the glass door 3. Since the coil spring 8 can be held, the number of parts can be reduced, and assembly is easy.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the latch rod 8 is described as an example in which the rotary tube 8a and the two latch rods 8b and 8c are configured. However, the single rod in which the rotary tube 8a and the latch rods 8b and 8c are integrated. You may comprise with a member.

  In the above-described embodiment, the coil spring 16 is used as the biasing spring. However, any spring may be used as long as it can provide an elastic force, and the attachment means for the panel 5 is also concave. A fixing tool or the like may be used without providing a place and engaging and supporting it.

  Furthermore, in the said Example, although the latch hook 8 demonstrated in the example arrange | positioned up and down, it is applicable also to the furniture which arrange | positions on the left and right with respect to the furniture main body, and opens and closes a door up and down.

It is a perspective view which shows the cabinet to which the latch apparatus of this invention was applied. It is an expansion perspective view which shows the principal part of the back side of a glass door. It is an enlarged rear view of the glass door which shows a latch apparatus. It is an AA vertical side view of the latch apparatus in FIG. 3 when the latch claw is engaged with the engaging portion. It is an AA vertical side view of the latch device showing the movement of the latch device when the glass door is opened when the latch claw is detached from the engaging portion. It is a perspective view which shows the latching claw and the engaging state of an engaging part above a latch apparatus. (A) is a BB end view showing the slide member and coil spring in FIG. 3 when the glass door is closed, and (b) is a diagram showing the slide member and coil spring in FIG. 3 when the handle is slid forward. It is a BB end view shown. (A) is CC end view in FIG. 3 which shows the state where the glass door is unlocked, (b) is CC end view in FIG. 3 which shows the state where the glass door was locked. is there.

Explanation of symbols

1 Cabinet (Furniture body)
2 Shelf 3, 3 'glass door (door)
4 Glass plate 5, 5 'Panel 6 Handle 7 Latch device 8 Latch rod 8a Rotating tube 8b Latch bar 8c Latch bar 8d Fitting hole 8e Fitting protrusions 9a, 9b Support member (mounting tool)
10a, 10b Latch claws 11a, 11b Engaging portion 14 Rotating piece (first rotating piece)
15 Recessed hole (recess)
16 Coil spring (biasing spring)
17 Slide members 17a and 17b Fitting piece 18 Mounting hole 19 Stepped recess 20 Fitting recess 21 Bearing bush (guide member)
21a Square tube (box-shaped part)
21b Cylindrical part 21c Flexible claw part 22 Sliding assisting tool 22a Support part 22b Sliding contact piece 22c Sliding contact surface 22d Sliding hole 22e Fitting groove 24 Connecting shaft 25 Locking device (locking / unlocking device)
25a Slide plate (plate)
25b Slide plate operation part (plate body operation part)
25c key cylinder 26 opening 28 key 29 second rotating piece

Claims (4)

A latch rod having a latch claw that can be engaged with an engagement portion provided on the furniture main body is engaged with the engagement portion by a biasing spring on the back surface of the door pivotally attached to the furniture main body. A latch claw that supports the latch rod against the urging force of the urging spring in a biased state and is linked to a handle that slides in the front-rear direction with respect to the door provided on the surface side of the door. In the door latch device in the furniture in which the door is opened by rotating so as to release from the engaging portion,
A slide member provided on the back side of the door that moves back and forth following the front and rear sliding of the handle is connected to the rear portion of the handle, and the latch rod is arranged eccentrically from the center axis of the slide member, One end of the urging spring stretched in the forward / backward movement direction of the slide member abuts on a rotating piece provided on the latch rod, and the other end is supported on the back surface of the door, and forward of the slide member. The latch device for the door in the furniture is characterized in that the latch rod is rotated through the rotating piece against the biasing spring force by the movement of.   The door latch device for furniture according to claim 1, wherein a rib protruding forward along the longitudinal direction is formed on a front surface of the slide member.   The door latch device for furniture according to claim 1, wherein a plurality of the rotating pieces are provided on the latch cage.   At least a part of the urging spring in the longitudinal direction is in contact with or in close proximity to the longitudinal movement of the slide member, and the end is engaged and supported in a recess formed in the door. The door latch device in the furniture according to any one of claims 1 to 3.

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