JP4987516B2 - Door locking / unlocking device with latch device in furniture - Google Patents

Description

  The present invention relates to a door locking / unlocking device having a latch device in furniture.

  A conventional locking / unlocking device provided with a latch device in furniture is provided on the side of a rotary tube (operation member) that is a part of a latch device attached to the back side of a door, and approaches the rotary tube. It has a locking piece. In addition, the rotating tube is provided with a locking portion that is eccentric from the center of rotation, and when the locking / unlocking device is locked, the locking piece comes into contact with the locking portion to restrict the rotation of the rotating tube. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 2001-342764 (page 4, FIG. 8)

  However, in Patent Document 1, in order to restrain the rotation of the shaft in a very limited space on the back side of the door, the locking piece must be assembled so that it can directly contact the operation member holding the shaft. Rather, it was a great effort in assembly work.

  The present invention has been made paying attention to such problems, and provides a door locking / unlocking device provided with a latch device in furniture capable of restraining the rotation of the latch rod and releasing the restraint with a simple structure. The purpose is to do.

In order to solve the above-mentioned problems, a door locking / unlocking device having a latch device for furniture according to claim 1 of the present invention includes a latch claw having a latch claw capable of engaging with an engaging portion provided in the furniture body. On the back surface of the door pivotally attached to the furniture body in a state where the latch claw is engaged and urged with the engaging portion, and operating means that is movable forward and backward provided on the front surface side of the door A latch device that rotates the latch rod so that the latch claw is disengaged from the engaging portion, and a state in which the latch device can be operated and a state in which the latch device can be operated by operating a key from the front surface side of the door. A door locking / unlocking device provided with a latch device in furniture in a furniture provided with
The rear portion of the operating means extends to the back side of the door and is connected to a slide member. The latch rod is disposed on the side of the slide member and is provided with first and second rotating pieces. In the unlocking operation, the sliding member moves forward in contact with the forward movement of the operating means and comes into contact with the first rotating piece, and the second rotating piece is formed on the back surface of the door. The latch is allowed to rotate by being inserted into the plate, so that the latch device can be operated, and in the lock operation of the key, the plate is slidably operated in accordance with the lock operation of the lock / unlock device on the back side of the door. The opening is closed by a body to prevent the second rotating piece from being inserted into the opening, thereby restricting the rotation of the latch rod, and the latch device becomes inoperable. Yes.
According to this feature, the operation of the latch device is restricted by restricting the rotation of the second rotation piece provided in the latch rod by a simple configuration of opening and closing the opening formed on the back surface of the door. In addition, since the rotation stroke of the latch rod is ensured by the formation of the opening to the door, the entire latch device can be brought closer to the back side of the door, thereby reducing the entire thickness. Moreover, the space which occupies the back surface of the door of a locking / unlocking apparatus can be suppressed by opening and closing an opening part with a plate body.

A door locking / unlocking device having a latch device in furniture according to claim 2 of the present invention is a door locking / unlocking device having a latch device in furniture according to claim 1 ,
The latch rod is composed of a rotating tube that is rotatable with respect to a fixture fixed to the back surface of the door, and a latch bar that is non-rotatably fitted to the rotating tube having a latch claw, The second rotating piece extends from a rotating tube in the vicinity of the fixture, and the opening is formed in the vicinity of the longitudinal end of the slide member, and in the vicinity of the opening is a plate of the locking / unlocking device. The body operating part is arranged.
According to this feature, since the rotating tube is rotatably supported by the fixture, the latch rod can be reliably and stably rotated. Further, since the opening is disposed in the vicinity of the end of the slide member and the plate body operating portion of the locking / unlocking device is disposed in the vicinity of the opening, the opening, the second rotating piece, and the plate are disposed on the back side of the door. The body operation parts can be gathered and arranged in a compact manner.

A door locking / unlocking device provided with a latch device in furniture according to claim 3 of the present invention is a door locking / unlocking device provided with a latch device in furniture according to claim 1 or 2 ,
The opening and the plate body actuating portion are linearly arranged in the longitudinal extension of the slide member, and the slide member and the latch rod are arranged so as to be substantially parallel to each other.
According to this characteristic, the space which occupies the sliding member, the latch rod, and the door back side of the plate body operation part can be suppressed as much as possible.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out a door locking / unlocking device provided with a latch device in furniture according to the present invention will be described below based on examples.

  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 latch device of the present invention is applied, and FIG. 3 is an enlarged rear view of the glass door showing the latch device, and FIG. 4 is an AA vertical side view of the latch device in FIG. 3 when the latch claw is engaged with the engaging portion. FIG. 5 is a vertical sectional 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, and FIG. FIG. 7A is a perspective view showing the engagement state of the latch claw and the engagement portion above the BB, and FIG. 7A is a BB end view showing the slide member and the coil spring in FIG. FIG. 7 (b) shows the slide member and the co-operator in FIG. 3 when the handle is slid forward. FIG. 8A is a CC end view of FIG. 3 showing a state where the glass door is unlocked, and FIG. It is CC end view in FIG. 3 which shows the locked state. 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 surface and the lower surface 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, the latch device 7 is constrained by the rotation of the second rotating piece 29 provided in the latch rod 8 by a simple configuration in which the opening 26 formed on the back surface of the glass door 3 is opened and closed. Since the rotation stroke of the latch rod 8 is secured by the formation of the opening 26 in the glass door 3, the entire latch device 7 is moved toward the back side of the glass door 3. , Can make the whole thin.

  Moreover, the space which occupies the back surface of the glass door 3 of the locking device 25 can be suppressed by performing opening and closing of the opening part 26 by the slide plate 25a.

  Further, since the rotating tube 8a is rotatably supported by the support members 9a and 9b, the latch rod 8 can be reliably and stably rotated. Moreover, since the opening part 26 is arrange | positioned in the vicinity of the edge part of the slide member 17, and the slide plate action | operation part 25b of the locking device 25 is arrange | positioned in the vicinity of the opening part 26, the opening part 26 and the 1st on the back side of the glass door 3. The two rotary pieces 29 and the slide plate actuating portion 25b can be compactly arranged together.

  Moreover, the space which occupies the door back side of the slide member 17, the latch rod 8, and the slide plate action | operation part 25b can be suppressed as much as possible.

  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.

  Moreover, although the locking device 25 was demonstrated in the example arrange | positioned under the slide member 17, it may be above the slide member 17, and the position can be set to the arbitrary positions of the glass door 3. FIG. Further, the position of the opening 26 provided on the back surface of the panel 5 is also determined by the rotation position of the second rotation piece 29. The second rotation piece 29 is not the rotation pipe 8a but the latch rod 8b side or the like. It can also be provided on the latch bar 8c side. Therefore, the slide member 17, the closing portion 26, and the slide plate actuating portion 25 b do not have to be arranged linearly in the longitudinal extension portion of the slide member 17 and close to each other.

  In the above embodiment, the slide plate 25a is linearly moved by the operation of the key 28 to open and close the opening 26. However, the moving direction of the slide plate 25a is set as appropriate. A rotating method may be used.

  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 the coil spring in FIG. 3 when the glass door is closed, and (b) is the slide member and the coil spring in FIG. 3 when the handle is slid forward. It is a BB end view shown. (A) is a CC end view in FIG. 3 showing a state where the glass door is unlocked, and (b) is a CC end view in FIG. 3 showing a state where the glass door is 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 (3)

A latch claw having a latch claw that can be engaged with an engaging portion provided in the furniture body is in a state in which the latch claw is engaged with and engaged with the engaging portion on the back surface of the furniture body that is pivotably mounted. And a latch device that pivots the latch rod so that the latch pawl is detached from the engaging portion in cooperation with an operation means that is pivotally supported and provided on the front surface side of the door, and is movable from the front surface side. A door locking / unlocking device provided with a latch device in furniture in a furniture provided with a locking / unlocking device that can be selected between a state where the latch device can be operated and a state where the latch device cannot be operated by operating a key of
The rear portion of the operating means extends to the back side of the door and is connected to a slide member. The latch rod is disposed on the side of the slide member and is provided with first and second rotating pieces. In the unlocking operation, the sliding member moves forward in contact with the forward movement of the operating means and comes into contact with the first rotating piece, and the second rotating piece is formed on the back surface of the door. The latch is allowed to rotate by being inserted into the plate, so that the latch device can be operated, and in the lock operation of the key, the plate is slidably operated in accordance with the lock operation of the lock / unlock device on the back side of the door. The opening is closed by a body to prevent the second rotating piece from being inserted into the opening, thereby restricting the rotation of the latch rod, and the latch device becomes inoperable. A door locking / unlocking device having a latch device for furniture. The latch rod is composed of a rotating tube that is rotatable with respect to a fixture fixed to the back surface of the door, and a latch bar that is non-rotatably fitted to the rotating tube having a latch claw, The second rotating piece extends from a rotating tube in the vicinity of the fixture, and the opening is formed in the vicinity of the longitudinal end of the slide member, and in the vicinity of the opening is a plate of the locking / unlocking device. 2. The door locking / unlocking device having a latch device for furniture according to claim 1 , wherein a body actuating portion is arranged. 2. The opening and the plate body actuating portion are linearly arranged in a longitudinally extending portion of the slide member, and the slide member and the latch rod are arranged so as to be substantially parallel to each other. Or the locking / unlocking device of the door provided with the latch apparatus in the furniture of 2 .

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