Door lock device

Abstract

To provide a door lock device improved in both the operability and the workability of installation work.SOLUTION: A door lock device 10 for hinged doors 2L, 2R of a cabinet 1 comprises: a hook member 30 that has an engagement surface 32 extending along a plane intersecting the front-rear direction, and is disposed on a bottom plate 1B of the cabinet 1; and sliding mechanisms 20. Each sliding mechanism has: a case body 21 fixed to lower end surface 2X of the respective doors 2L, 2R; a slide body 22 accommodated in the case body 21 slidably to the left and right, and positioned with its tip facing the engagement surface 32; biasing means 25 disposed on a base end side of the slide body 22 to urge it toward the other side in the left-right direction; a groove portion 23 that is formed as a cutout at the tip of the slide body 22 and engageable with the engagement surface 32 when the doors 2L, 2R are closed; and a through-hole 26 penetrating the slide body 22. The tip of the slide body 22 forms a first tapered surface 24 such that portions of the surface extending rearward from the groove portion 23 are positioned further toward the one side in the left-right direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a door lock device that is applied to a cupboard having a hinged door. [Background technology]

[0002] For example, cabinets with hinged doors are known as wall cabinets and cupboards. In order to hold the door closed, such cabinets are generally equipped with retaining hardware such as roller catches, magnetic catches, and spring catches. This type of retaining hardware does not require a release operation to release the closed state, making it easy to open and close the door. However, if the retaining hardware alone is used, the retaining state may be released unintentionally if the cabinet or door is subjected to strong vibrations (shocks) due to an earthquake or the like.

[0003] Conventionally, a technique is known in which a locking device that requires an unlocking operation is provided to more reliably hold the door closed. For example, Patent Document 1 discloses a door locking device in which a pressing claw of a locking body provided on the door body side is engaged and locked with a cabinet body to lock the door body in a closed state. In this technique, the pressing claw of the locking body is rotated by sliding a sliding body to release the engagement and locking of the cabinet body and the locking body, and then the door body is opened.

[0004] For example, in the case of wall cabinets and cupboards, which are often placed near the ceiling in a room, if the doors open during an earthquake, the dishes, glasses, and other items stored inside may fall and be damaged. There is also a risk of injury from pieces of the broken items. For this reason, it is particularly desirable to provide a door locking device as described above for wall cabinets and cupboards as a precaution against earthquakes. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 7-26557 Summary of the Invention [Problem to be solved by the invention]

[0006] As described above, the door lock device as disclosed in Patent Document 1 requires two operations, an unlocking operation for releasing the lock and an operation for opening and closing the door, so there is room for improvement in operability (ease of operation). Furthermore, in order to popularize door lock devices, it is desirable that the work of attaching (retrofitting) door lock devices to existing cupboards be easy.

[0007] However, with the technology of Patent Document 1, the door had to be opened while maintaining the state in which the locking body's push claw was rotated by sliding the slide body with the fingertip, and operability was insufficient. Also, since the locking body's push claw is structured to engage with the cabinet body, processing of the cabinet body was required, making it difficult to retrofit the door lock device. The door lock device of the present invention has been devised in view of the above-mentioned problems, and one of its objects is to improve both the operability of the door lock device and the workability of its installation. [Means for solving the problem]

[0008] The present invention has been made to solve at least part of the above problems, and can be realized in the following aspects or application examples.

[0009] (1) The door lock device according to this application example is a door lock device installed in a cupboard in which an opening provided at the front of a storage space is closed by a hinged door that is operated to open and close in the front-rear direction, the door lock device having an engagement surface extending along a plane intersecting the front-rear direction in which the door is opened and closed, the door lock device including a hook member provided on the underside of a bottom plate that forms the bottom of the storage space, a case body fixed to a lower end surface of the door, and a hook member that is accommodated in the case body so as to be slidable along the left-right direction and that is arranged on one side of the engagement surface of the hook member in the left-right direction when the door is closed, with its tip facing the engagement surface. the sliding mechanism includes a sliding body having a force acting on the sliding body, a biasing means provided on the base end side of the sliding body opposite the tip and biasing the sliding body to the other side in the left-right direction, a groove portion formed in the tip of the sliding body in a notch shape along the up-down and left-right directions and capable of engaging with the engagement surface when the door is closed, and a through hole extending in the up-down direction in the downward facing surface of the sliding body, and the tip of the sliding body forms a first tapered surface whose thickness in the front-to-rear direction becomes thinner toward the tip at a portion rearward of the groove portion.

[0010] (2) In the door lock device according to this application example, the tip of the sliding body preferably forms a second tapered surface in which the thickness in the front-to-rear direction decreases toward the tip in the portion forward of the groove. (3) Furthermore, in the door lock device according to this application example, it is preferable that the doors are a pair of left and right doors that open like hinged doors, the hook member is attached to a position where the pair of left and right doors are butted together, and a pair of left and right sliding mechanisms, one for each of the pair of left and right doors, are arranged symmetrically around the hook member.

[0011] (4) Furthermore, in the door lock device according to this application example, it is preferable that the through hole be provided in a position overlapping a screw hole for fixing the case body to the bottom end surface of the door when viewed from the top-bottom direction. (5) Furthermore, in the door lock device according to this application example, it is preferable that the screw holes are arranged side by side in the left-right direction, and the through hole is arranged in a position that overlaps one of the two screw holes when the sliding body is in a predetermined first state, and overlaps the other of the two screw holes when the sliding body is in a second state located to one side in the left-right direction from the first state, when viewed from the top-bottom direction. (6) Furthermore, in the door lock device according to this application example, it is preferable that the through hole be used for two operations: a sliding operation for sliding the sliding body and an installation operation for attaching a screw to the screw hole. Effect of the Invention

[0012] According to the present invention, it is possible to improve both the operability of the door lock device and the workability of the installation work. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view of a door lock device according to an application example and a wall cupboard to which the door lock device is applied; [Diagram 2] 2 is a perspective view of the door lock device of FIG. 1 as viewed from the bottom left. [Diagram 3] FIG. [Figure 4] 5(a) to 5(c) are explanatory views of the door lock device for the right door as viewed from below to explain the operation when the right door is closed. [Diagram 5] 11 is an explanatory diagram of the door lock device of the right door as viewed from below to explain the operation when the right door is opened. FIG. [Figure 6] 1 is an explanatory diagram of the door locking device as viewed from the bottom right for explaining the unlocking operation of the door locking device and the door opening operation. FIG. [Figure 7] 4 is a development view of a case body of the slide mechanism. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The embodiments of the present invention will be described with reference to the drawings. The following embodiments are merely examples, and are not intended to exclude the application of various modifications and techniques not specified in the embodiments. The configurations of the following embodiments can be modified in various ways without departing from the spirit of the embodiments. In addition, they can be selected or combined as necessary. The directions used in this specification are defined as follows. The side where the opening of the cupboard storage space is located is called the "front" ("F" in the figure), and the opposite side (i.e. the side where the back is located) is called the "back" ("B" in the figure). Additionally, the side where the top surface of the storage space is located is called the "top" ("U" in the figure), and the opposite side (i.e. the side where the bottom surface is located) is called the "bottom" ("D" in the figure). Additionally, the left and right directions from front to back are defined ("R" and "L" in the figure).

[0015] [1. Configuration] Fig. 1 is a perspective view of a door locking device 10 according to this application example and a cupboard 1 to which the door locking device 10 is applied, as viewed from the front. Fig. 2 is a perspective view of the door locking device 10 of Fig. 1, as viewed from the lower left. The cupboard 1 is a cubic storage device that has a storage space (not shown) with an opening on the front and a pair of left and right doors 2L, 2R for closing the opening, and stores items in the storage space. The storage space of the cupboard 1 in FIG. 1 is surrounded by a top plate 1T that forms the top surface of the storage space, side plates 1S (only the right side in FIG. 1 is shown) that form the left and right sides of the storage space, a bottom plate 1B (see FIG. 2) that forms the bottom surface of the storage space, and a back plate (not shown) that forms the back surface of the storage space. This cupboard 1 is used, for example, as a hanging cupboard. In this case, the cupboard 1 is fixed to the ceiling of a room by the top plate 1T, or fixed to a wall surface (not shown) of the room by the side plates 1S and / or the back plate.

[0016] Each of the doors 2L, 2R is a flat plate member that covers an opening located at the front of the storage space of the cupboard 1. Each of the doors 2L, 2R is provided symmetrically on the left and right. As shown in Fig. 1 and Fig. 2, the right door 2R (also referred to as the "right door") covers the right half of the front surface of the storage space, and the left door 2L (also referred to as the "left door") covers the left half of the front surface of the storage space. The left edge of the right door 2R and the right edge of the left door 2L are butted against each other in the center in the left-right direction on the front surface of the cupboard 1. The right edge of the right door 2R and the left edge of the left door 2L are each supported by a hinge 3 (only the right hinge is shown in Fig. 1) to be rotatable in the front-rear direction relative to the side panel 1S of the storage space. In other words, each door 2L, 2R is a door that opens both left and right (double door type) and opens and closes in the front-rear direction.

[0017] Specifically, when the right door 2R is opened, it rotates forward around a hinge 3 provided on the right side thereof, and when the right door 2R is closed, it rotates backward around a hinge 3 provided on the right side thereof. When the left door 2L is opened, it rotates forward around a hinge (not shown) provided on the left side thereof, and when the left door 2L is closed, it rotates backward around a hinge (not shown) provided on the left side thereof. In Fig. 2, the black arrow indicates the direction of the pushing operation when closing the left door 2L.

[0018] As shown in Figs. 1 and 2, the cupboard 1 is provided with a door lock device 10 for locking (holding) the doors 2L, 2R in a closed state. The door lock device 10 includes a hook member 30 provided on the lower surface side of the bottom plate 1B of the cupboard 1, and slide mechanisms 20L, 20R provided on the lower end surfaces 2X of the doors 2L, 2R, respectively.

[0019] The bottom plate 1B of the cupboard 1 is a plate-like member extending in the front-rear and left-right directions, and serves as an attachment site for the hook members 30. The lower end surfaces 2X of the doors 2L, 2R are surfaces extending in the front-rear and left-right directions at the lower ends of the doors 2L, 2R, and serve as attachment sites for the slide mechanisms 20L, 20R. In this embodiment, the lower surface of the bottom plate 1B and the lower end surfaces 2X of the doors 2L, 2R are provided so as to be substantially flush with each other. Therefore, the hook member 30 and the slide mechanisms 20L, 20R are attached to attachment positions that are substantially flush with each other. Note that "substantially flush" does not only mean that the lower surface of the bottom plate 1B and the lower end surfaces 2X of the doors 2L, 2R are at the same height position in the up-down direction, but also means that there are some differences but they can be considered to be substantially the same.

[0020] The hook member 30 is disposed at the center in the left-right direction on the front side of the bottom plate 1B, and is provided corresponding to the position where the left and right doors 2L, 2R butt together (so-called "door edges"). The slide mechanisms 20L, 20R are disposed symmetrically about the hook member 30. The right slide mechanism 20R on the right door 2R side is disposed on the right side of the hook member 30. The left slide mechanism 20L on the left door 2L side is disposed on the left side of the hook member 30.

[0021] First, the configuration of the hook member 30 will be described. As shown in FIG. 2, the hook member 30 can be said to be a locking member that engages with the left and right slide mechanisms 20L, 20R to lock the doors 2L, 2R so that they do not open (do not move away from the cupboard 1). The hook member 30 includes a base 31, an extension 33 extending forward from the base 31, and an engagement surface 32 connected to the front end of the extension 33. The hook member 30 is formed, for example, by bending a metal plate into an L shape. The base 31 is a flat portion that fits along the bottom plate 1B and serves as a fixed portion to the bottom plate 1B. The base 31 in Fig. 2 is attached to the bottom plate 1B by two screws 34 that are arranged side by side in the left-right direction.

[0022] The extension 33 is a planar portion extending in the front-rear and left-right directions, and extends forward beyond the front end of the bottom plate 1B. That is, a part of the extension 33 is disposed at a position overlapping the door ends of the doors 2L and 2R when viewed from the top-bottom direction. The extension 33 can also be said to be a connecting portion that connects the base 31 and the engagement surface 32. The extension 33 is offset downward from the base 31 by bending so as not to interfere with the opening and closing operations of the doors 2L and 2R.

[0023] The engagement surface 32 is a planar portion extending along a plane intersecting the front-rear direction in which the doors 2L and 2R are opened and closed. The engagement surface 32 extends downward from the front end of the extension portion 33 and also extends along the up-down and left-right directions. The engagement surface 32 can also be said to be a portion that is bent downward at approximately 90° relative to the extension portion 33 .

[0024] Next, the configuration of the left and right slide mechanisms 20L, 20R will be described. The left and right slide mechanisms 20L, 20R have the same configuration except that they are provided symmetrically. Therefore, in the following description, when there is no need to distinguish between the left and right slide mechanisms 20L, 20R, they will be referred to as the "slide mechanism 20." As shown in FIGS. 2 and 3, the slide mechanism 20 includes a case body 21 and a slide body 22 housed within the case body 21 so as to be slidable in the left-right direction. The case body 21 is a cubic casing member for accommodating the sliding body 22, and is fixed to the lower end surface 2X of each of the doors 2L, 2R. From the viewpoint of ensuring a movable range of the sliding body 22, the case body 21 is formed in a rectangular parallelepiped shape extending in the left-right direction.

[0025] As shown in FIG. 3, the case body 21 has an upper surface portion 21C that forms a fixed surface to the lower end surface 2X, and a pair of front and rear side surfaces 21A and end surface portion 21B that extend downward from the upper surface portion 21C. In this case body 21, a sliding body 22 is housed in a space surrounded by an upper surface portion 21C, a pair of side surface portions 21A, and an end surface portion 21B.

[0026] In this case body 21, as shown in Figs. 2 and 3, a pressing piece 21H is provided on the surface facing the top surface portion 21C, extending in a flange shape from the lower edge of each of the pair of side surface portions 21A and the end surface portion 21B. Also, a stopper piece 21S is provided on the edge portion on the door end side of the top surface portion 21C on the surface facing the end surface portion 21B. Each pressing piece 21H partially covers the surface facing the top surface portion 21C (the surface facing downward). The portion of the surface of the case body 21 facing the top surface portion 21C other than the pressing piece 21H forms an opening. This opening ensures access to the through hole 26 of the sliding body 22.

[0027] Also, the stopper piece 21S partially covers the surface facing the end surface portion 21B. Each pressing piece 21H is a piece that prevents the sliding body 22 from escaping downward from inside the case body 21. The stopper piece 21S is a piece that prevents the sliding body 22 from escaping from the case body 21 toward the door end. Also, on the surface facing the top surface portion 21C and the surface facing the end surface portion 21B, the portions excluding the portions where the pressing pieces 21H and the stopper piece 21S are arranged (uncovered surfaces) form openings. In other words, this case body 21 can be said to be a case body with openings provided on two surfaces, the surface facing the top surface portion 21C and the surface facing the end surface portion 21B. In addition, in the case body 21, a reinforcing piece 21BH extending from the side surface portion 21A is folded over onto the outer side of the end surface portion 21B to reinforce the strength of the end surface portion 21B.

[0028] 3, two screw holes 12 arranged side by side in the left-right direction are provided in the upper surface portion 21C of the case body 21. The case body 21 is fixed to a predetermined attachment position 2Y from below the lower end surface 2X by screws 11 inserted into the respective screw holes 12. A slide body 22 is disposed inside this case body 21. That is, a case body 21 and a slide body 22 are disposed for each of the doors 2L and 2R in this order from above.

[0029] The sliding body 22 is a three-dimensional member that is provided so as to be movable in the left-right direction relative to the case body 21. Of the sliding body 22, the end portion on the side where the end surface portion 21B of the case body 21 is located is referred to as the "base end," and the end portion located on the opposite side in the left-right direction to the base end, i.e., the end portion on the door tip side, is referred to as the "tip end." In the right-side sliding mechanism 20R, the sliding body 22 is disposed on the right side (one side in the left-right direction) of the engagement surface 32 of the hook member 30 when the door 2R is closed, and is oriented with its tip facing the engagement surface 32. Since an opening is provided in the surface of the sliding body 22 on the tip side (the surface facing the end surface portion 21B) of the case body 21, the tip of the sliding body 22 can protrude to the left side of the case body 21 (the other side in the left-right direction).

[0030] In the left-side sliding mechanism 20L, the sliding body 22 is disposed on the left side (one side in the left-right direction) of the engagement surface 32 of the hook member 30 when the door 2L is closed, and is oriented with its tip facing the engagement surface 32. Since an opening is provided in the surface of the sliding body 22 on the tip side (the surface facing the end surface portion 21B) of the case body 21, the tip of the sliding body 22 can protrude to the right side of the case body 21 (the other side in the left-right direction). That is, the right-side slide mechanism 20R and the left-side slide mechanism 20L are disposed in such a manner that their leading ends face each other with the engagement surface 32 therebetween.

[0031] A coil spring 25 is disposed between the base end of the sliding body 22 and the end surface portion 21B of the case body 21. The coil spring 25 is disposed with its axis aligned in the left-right direction, and is a compression spring (compression spring) that generates a repulsive force toward the tip side (the other side in the left-right direction) of the sliding body 22 in response to compressive deformation toward the base end side (one side in the left-right direction) of the sliding body 22. In the right-side slide mechanism 20R, the coil spring 25 is disposed on the right side of the base end of the slide body 22, and serves as a biasing means that biases the slide body 22 to the left (the other side in the left-right direction) by the repulsive force generated when compressed and deformed. In the left slide mechanism 20L, the coil spring 25 is disposed to the left of the base end of the slide body 22 and serves as a biasing means that biases the slide body 22 to the right (the other side in the left-right direction) by the repulsive force generated when compressed and deformed.

[0032] When no external force (external force in the sliding direction) is applied to slide the sliding body 22 toward the base end side, the sliding body 22 is biased toward the tip side by the repulsive force of the coil spring 25, or is provided such that when the coil spring 25 is fully extended and in its natural length, its tip protrudes from the case body 21. Here, the movement of the sliding body 22 toward the tip side is restricted by the stopper piece 21S. Therefore, when no external force is applied in the sliding direction, the sliding body 22 is held in a protruding state in which its tip protrudes from the case body 21 by a predetermined amount. 2, in the right-side sliding mechanism 20R, in the protruding state, the tip of the sliding body 22 protrudes to the left side from the case body 21. In the left-side sliding mechanism 20L, in the protruding state, the tip of the sliding body 22 protrudes to the right side from the case body 21.

[0033] When an external force (external force in the sliding direction) is applied to the sliding body 22 to slide it toward the base end side, the sliding body 22 is moved toward the base end side against the repulsive force of the coil spring 25. The external force in the sliding direction is, for example, an operating force applied by a user to move the sliding body 22 with his / her fingers. When the slider 22 is slid toward the base end, the tip end of the slider 22 is pushed (retracted) into the case body 21. In other words, the left-right dimension of case body 21 is set smaller than the sum of the left-right dimension of coil spring 25 when not compressed by external force in the sliding direction and the left-right dimension of sliding body 22, and can be said to be set larger than the sum of the left-right dimension of coil spring 25 when the tip of sliding body 22 is pressed into case body 21 and the left-right dimension of sliding body 22.

[0034] A groove 23 that can be engaged with the engagement surface 32 when the doors 2L, 2R are closed is provided at the tip of the slide body 22. The groove 23 is formed in the shape of a notch along the up-down direction and the left-right direction. As shown in Figure 2 for the right-side slide mechanism 20R, when the engagement surface 32 is inserted between the front wall 23F (see Figure 3) located at the front of the groove portion 23 and the rear wall 23B (see Figure 3) located at the rear of the groove portion 23, the groove portion 23 is engaged with the engagement surface 32, and the door 2R is locked in the closed position. As shown in Figure 2 for the left-hand slide mechanism 20L, when the engagement surface 32 is not inserted between the front wall 23F and the rear wall 23B of the groove portion 23, the groove portion 23 is not engaged with the engagement surface 32, and the door 2L is in a state in which it can be opened and closed (unlocked state).

[0035] The dimension between the front wall 23F and the rear wall 23B of the groove portion 23 (the dimension of the groove portion 23 in the front-to-rear direction) is set to be larger than the thickness of the engagement surface 32 so that the engagement surface 32 can be inserted between the front wall 23F and the rear wall 23B. The dimension of groove 23 in the left-right direction may be set to an appropriate dimension so that the state in which groove 23 is engaged with engagement surface 32 can be appropriately maintained. If the dimension of groove 23 in the left-right direction is too short, engagement surface 32 will be easily disengaged from groove 23, making it difficult to appropriately maintain the engaged state. If the dimension of groove 23 in the left-right direction is too long, engagement surface 32 will be difficult to disengage from groove 23, making it difficult to release the locked state.

[0036] A tapered surface 24 is provided at the tip of the slide body 22, which is symmetrical in the front-rear direction with respect to the groove portion 23. The tapered surface 24 located rearward from the groove portion 23 is referred to as a first tapered surface 24B. The tapered surface 24 located forward from the groove portion 23 is referred to as a second tapered surface 24F. The first tapered surface 24B is an inclined surface whose thickness in the front-rear direction decreases toward the tip at a portion rearward of the groove portion 23, and the second tapered surface 24F is an inclined surface whose thickness in the front-rear direction decreases toward the tip at a portion forward of the groove portion 23. In other words, the first tapered surface 24B and the second tapered surface 24F are formed symmetrically in the front-rear direction with respect to the groove portion 23 as the center, and are configured in common except for the direction of inclination with respect to the front-rear direction.

[0037] A through hole 26 is provided in the downward surface of the sliding body 22 along the up-down direction. The through hole 26 is shaped larger than a user's finger and is used as a "handhold" when inserting the finger into the through hole 26 to slide the sliding body 22. For example, a user can insert a finger into the through hole 26 to slide the sliding body 22 toward the base end side (one side in the left-right direction). A structure in which the through hole 26 is provided for sliding movement operation is advantageous in that it is simple and easy to process and mold, compared to a structure in which a lever for sliding movement operation is provided protruding from the sliding body 22, for example.

[0038] As shown in FIG. 3, the through hole 26 of the sliding body 22 is provided at a position overlapping the screw hole 12 provided in the upper surface portion 21C of the case body 21 when viewed from the top-bottom direction. In this case, the through hole 26 of the sliding body 22 also functions as an attachment port for attaching the screw 11 to the screw hole 12. That is, the through hole 26 is used for two operations: a sliding operation when sliding the sliding body 22 and an attachment operation when attaching the screw 11 to the screw hole 12.

[0039] Specifically, in the right-side slide mechanism 20R, the through hole 26 of the slide body 22 is provided at a position that overlaps with the left one of the two screw holes 12 arranged side by side in the left-right direction when the slide body 22 is in a predetermined first state, and overlaps with the right one of the two screw holes 12 when the slide body 22 is in a second state. Here, the first state is a protruding state in which the tip of the slide body 22 protrudes to the left beyond the case body 21, and the second state is a state in which the slide body 22 has moved to the right (proximal end side) from the first state. In the left slide mechanism 20L, the through hole 26 of the slide body 22 is provided at a position that overlaps with the right one of the two screw holes 12 arranged side by side in the left-right direction when the slide body 22 is in a predetermined first state, and overlaps with the left one of the two screw holes 12 when the slide body 22 is in a second state. Here, the first state is a protruding state in which the tip of the slide body 22 protrudes to the right beyond the case body 21, and the second state is a state in which the slide body 22 has moved further to the left (toward the base end) than in the first state.

[0040] As described above, in the protruding state of the slider 22, the movement of the slider 22 toward the tip side (the other of the left and right directions) is restricted by the stopper piece 21S. Here, an example of a structure for restricting the movement of the slider 22 by the stopper piece 21S will be described. In the right-side slide mechanism 20R, the stopper piece 21S is formed by bending the left end of the upper surface portion 21C downward at approximately 90 degrees. In the left-side slide mechanism 20L, the stopper piece 21S is formed by bending the right end of the upper surface portion 21C downward. In other words, the stopper piece 21S forms a wall surface extending downward from the upper surface portion 21C. The sliding body 22 has feet 27 protruding from a surface (a surface facing upward in the sliding body 22) facing the upper surface portion 21C of the case body 21. The feet 27 extend in the left-right direction on both sides in the front-rear direction of the sliding body 22. When the sliding body 22 is in the protruding state, the tips of the feet 27 come into contact with the stopper pieces 21S, and the movement of the sliding body 22 is restricted.

[0041] As described above, the edge of each side surface portion 21A and end surface portion 21B of the case body 21 is provided with the pressing pieces 21H for preventing the sliding body 22 housed in the case body 21 from falling off downward. These pressing pieces 21H partially cover the surface (facing downward) facing the top surface portion 21C of the case body 21, and the portion of the surface facing the top surface portion 21C of the case body 21 other than the pressing pieces 21H forms an opening. This opening ensures access to the through hole 26 of the sliding body 22. In addition, in the case body 21, a reinforcing piece 21BH extending from the side surface portion 21A is folded over onto the outer side of the end surface portion 21B to reinforce the strength of the end surface portion 21B.

[0042] Next, the operation of the door locking device 10 when closing the right door 2R will be described with reference to Figures 4(a) to (c). Figures 4(a) to (c) are views of the door locking device 10 as viewed from below. 4(a) shows the state immediately before the right door 2R reaches the closed state. The coil spring 25 is not compressed, and the tip of the sliding body 22 protrudes to the left from the case body 21. Note that the movement of the sliding body 22 is restricted by a stopper piece 21S (shown by a dashed line in the figure), and the tip of the sliding body 22 does not protrude further to the left. In this state, the first tapered surface 24 B provided at the tip of the slider 22 abuts on the right edge of the engagement surface 32 of the hook member 30 .

[0043] When the user pushes the door 2R in the closing direction (indicated by the white arrow) from the state shown in Fig. 4(a), the door 2R is pushed backward. As a result, as shown in Fig. 4(b), the first tapered surface 24B comes into sliding contact with the right edge of the engagement surface 32, and the sliding body 22 is pushed (moved) to the right against the repulsive force of the coil spring 25. As shown in Fig. 4(b), when the right door 2R is pushed into the closed state and the groove 23 of the sliding body 22 is positioned facing the engagement surface 32, the sliding body 22 moves leftward due to the repulsive force of the coil spring 25. As a result, the groove 23 automatically engages with the engagement surface 32. The engagement between the groove 23 and the engagement surface 32 is maintained by the repulsive force of the coil spring 25. In addition, the forward movement of the right door 2R is restricted by the rear wall 23B of the groove 23. Therefore, the right door 2R is locked in the closed state.

[0044] Fig. 5 explains the operation of the door locking device 10 when the right door 2R is opened. Fig. 5 is a view of the door locking device 10 as viewed from below. When unlocking the right door 2R, as shown in FIG. 5, the user slides the slide body 22 to the right by placing (or inserting) his / her finger into the through hole 26. This disengages the groove 23 from the engagement surface 32. The user can open the right door 2R by pulling the right door 2R forward. As an example of an operation for unlocking the right door 2R and opening the right door 2R, the user may slide the slide body 22 to the right and engage the groove 23 with the engagement surface 32, and then release the slide body 22. In this case, when the slide body 22 moves leftward due to the repulsive force of the coil spring 25, the first tapered surface 24B comes into sliding contact with the right edge of the engagement surface 32, and the right door 2R semi-automatically opens forward. At this time, the repulsive force of the hinge 3 also acts in the direction of opening the right door 2R. When the left door 2L is locked in the closed state, and when the left door 2L is unlocked and opened, the door locking device 10 operates in the same manner as the right door 2R described above, except that the left and right doors are symmetrical.

[0045] As an example of the configuration of case body 21, a three-dimensional case body 21 may be formed by bending a flat sheet metal member. 7 is a development view for explaining the state in which the case body 21 is spread out into a flat plate. In this case, the flat plate-shaped sheet metal member constituting the case body 21 has areas corresponding to the top surface 21C, a pair of side surfaces 21A connected to the top surface 21C, the end surface 21B, the pressing pieces 21H extending from the side surface 21A and the end surface 21B, the reinforcing pieces 21BH extending from the side surface 21A, and the stopper pieces 21S extending from the top surface 21C. Also, a screw hole 12 is provided in the area corresponding to the top surface 21C.

[0046] A manufacturing method for manufacturing the slide mechanism 20 using such a sheet metal member is a method in which the sheet metal member is manually folded to form a three-dimensional case body 21, and the slide body 22 and the coil spring 25 are housed therein. An example of the manufacturing method includes the following steps. That is, a placement process of placing the slide body 22 and the coil spring 25 on a flat plate-shaped sheet metal member constituting the case body 21; the manufacturing method including a step of forming the case body 21 by bending the sheet metal member on which the slide body 22 and the coil spring 25 are arranged, and assembling the slide mechanism 20. In this case, the sliding mechanism 20 can be assembled by a simple process of just bending sheet metal members. After assembling the sliding mechanism 20 as described above, the user can screw (fix) the sliding mechanism 20 to the lower end surfaces 2X of the doors 2L, 2R. Furthermore, in this embodiment, the through holes 26 into which the user's fingers are inserted are located forward of the hinges 3, so that when the user inserts his or her fingers to open or close the doors 2L, 2R, the doors can be opened and closed smoothly due to the relationship of the moment.

[0047] [2. Effects] The present embodiment described above provides the following advantageous effects. (1) In the door lock device 10 according to this application example, a groove 23 is provided at the tip of a slide body 22 in a slide mechanism 20 attached to the lower end surface 2X of the doors 2L, 2R, and this groove 23 engages with an engagement surface 32 of a hook member 30 fixed to the bottom plate 1B side. Since the engagement surface 32 extends on a plane intersecting the opening direction (front-rear direction) of the doors 2L, 2R, the opening operation (and opening operation) of the doors 2L, 2R is restricted by the engagement of the groove 23 with the engagement surface 32. Therefore, the doors 2L, 2R are locked in the closed state.

[0048] Since the first tapered surface 24B is provided at the tip of the sliding body 22, simply by pushing the doors 2L, 2R in the closing direction, the first tapered surface 24B comes into sliding contact with the engagement surface 32 of the hook member 30, and the sliding body 22 is pushed to one side in the left-right direction. Therefore, when the doors 2L, 2R are in the closed state, the groove portion 23 can automatically engage with the engagement surface 32. Therefore, no locking operation is required other than the closing operation of pushing the doors 2L, 2R in the closing direction. When opening the doors 2L, 2R, as shown in Figure 6, it is only necessary to slide the slide body 22 of each of the left and right slide mechanisms 20L, 20R to one side in the left-right direction to release (unlock) the engagement between the groove portion 23 and the engagement surface 32, and open the doors 2L, 2R forward (indicated by the white arrow in Figure 6). Therefore, the door locking device 10 according to this application example has a simple locking / unlocking operation and is easy to operate.

[0049] Furthermore, the door lock device 10 can be attached to the cupboard 1 simply by attaching the slide mechanism 20 to the lower end surfaces 2X of the doors 2L, 2R and fixing the hook member 30 to the bottom plate 1B side. For example, both the slide mechanism 20 and the hook member 30 can be attached simply by screwing. Therefore, the door lock device can be attached to an existing cupboard more easily than in the conventional technology that requires processing on the cupboard body side for locking engagement.

[0050] In other words, the door lock device 10 according to this application example has a simple structure using the slide mechanism 20 and the hook member 30, which can improve both the operability of the door lock device 10 and the workability of installing the door lock device. The door lock device 10 according to this application example can be easily attached to existing cupboards, which contributes to reducing damage in the event of an earthquake disaster.

[0051] (2) In the door lock device 10 according to this application example, the front part of the tip of the slide body 22 opposite to the first tapered surface 24B forms the second tapered surface 24F. Therefore, the slide mechanisms 20L, 20R can be used for either the left or right door 2L, 2R, regardless of whether it is for the right door or the left door. For example, in Figs. 1 to 5, when the slide mechanism 20R attached to the right door 2R is reversed and applied to the left door 2L, the second tapered surface 24F, which was located in front of the groove portion 23 when used with the right door 2R, functions as the first tapered surface 24B located behind the groove portion 23. Since there is no need to distinguish between the slide mechanism 20 for the right door and the left door, the work of installing the door lock device is made easier.

[0052] (3) The cupboard 1 to which the door lock device 10 according to this application example is applied has a pair of left and right double doors 2L, 2R, a hook member 30 is attached at the position where the pair of left and right doors 2L, 2R are butted against each other, and a pair of slide mechanisms 20L, 20R, one for each of the pair of left and right doors 2L, 2R, are arranged symmetrically about the hook member 30. In this case, since the first tapered surface 24B and the second tapered surface 24F are provided at the tip of the slide body 22, the slide mechanism 20 can be used for the doors 2L, 2R regardless of whether it is for the right door or the left door. Therefore, the above-mentioned workability is further improved for the cupboard 1 having the double doors 2L, 2R.

[0053] (4) Since the through holes 26 provided in the sliding body 22 for sliding operation are provided at positions overlapping the screw holes 12 for fixing of the case body 21, the through holes 26 used for sliding the sliding body 22 also function as openings for attaching screws. Since the screws 11 can be attached to the screw holes 12 from the through holes 26, the above-mentioned operability is further improved.

[0054] (5) Furthermore, with respect to the two screw holes 12 arranged side by side in the left-right direction, the through hole 26 is positioned so as to overlap one of the two screw holes 12 when the sliding body 22 is in a predetermined first state when viewed from the top-bottom direction, and so as to overlap the other of the two screw holes 12 when the sliding body 22 is in a second state located to one side in the left-right direction from the first state. In this case, the user installs a screw 11 in one of the two screw holes 12 with the sliding body 22 positioned in the first state, and installs the screw 11 in one of the screw holes 12 with the sliding body 22 moved from the first state to the second state. With this structure, in addition to the effect of (4) above, the distance between the two screw holes 12 can be made small, making it possible to make the slide mechanism 20 more compact and ensuring the mounting strength. (6) Furthermore, the through hole 26 is used for two operations: a sliding operation when sliding the sliding body 22, and an attachment operation when attaching the screw 11 to the screw hole 12. In this way, the structure for the sliding operation and the structure for the attachment operation are combined (integrated) in the single through hole 26, so that the slide mechanism 20 (door lock device 10) can be made smaller and simpler than a structure that has a structure for the sliding operation and a structure for the attachment operation separately.

[0055] [3.Other] The door lock device 10 may be provided on only one of the doors 2L and 2R. Furthermore, the cupboard 1 to which the door lock device 10 is applied may be one provided with only the door 2L or 2R. The sliding body 22 is not limited to having both the first tapered surface 24B and the second tapered surface 24F, and may be provided with only the first tapered surface 24B. In this case, too, the effect of improving both the operability of the door lock device 10 and the workability of the installation work of the door lock device as described in (1) above can be obtained. In addition, the tip of the sliding body 22 is not limited to the tapered surface described above, and may be an arc-shaped curved surface.

[0056] Case body 21 is not limited to a member made by bending a metal sheet, but may be any member made by molding metal or resin using a three-dimensional mold, or by injection molding resin. The through hole 26 may be provided so as to overlap both of the two screw holes 12 when viewed from above and below.

[0057] In the above embodiment, the hook member 30 is fixed to the bottom plate 1B of the cupboard 1. However, depending on the shape and usage of the cupboard 1, a vertical wall surface extending in the up-down and left-right directions from near the front end of the bottom plate 1B may be provided, and the hook member 30 having the shape shown in FIG. 2 may not be applicable. In such a case, the shapes of the base 31 and the extension 33 of the hook member 30 may be modified. Specifically, the base 31 of the hook member 30 is disposed along the vertical wall surface, the extension 33 extends forward from the upper or lower end of the base 31, and the engagement surface 32 is provided at the front end of the extension 33. One example of the shape of such a hook member 30 is a U-shaped cross section.

[0058] The following discloses additional notes regarding this embodiment. [Appendix 1] A door lock device provided in a cupboard in which an opening provided at the front of a storage space is closed by a hinged door that can be opened and closed in the front-rear direction, a hook member provided on the lower surface side of a bottom plate that forms the bottom surface of the storage space, the hook member having an engagement surface extending along a plane that intersects with the front-rear direction in which the door is opened and closed; a slide mechanism including: a case body fixed to a lower end surface of the door; a slide body accommodated in the case body so as to be slidable in the left-right direction, and disposed on one side in the left-right direction of the engagement surface of the hook member when the door is closed, with a tip facing the engagement surface; a biasing means provided on a base end side of the slide body opposite the tip, and biasing the slide body to the other side in the left-right direction; a groove portion formed in the tip of the slide body in a notch shape along the up-down direction and the left-right direction and capable of engaging with the engagement surface when the door is closed; and a through hole provided in a downwardly facing surface of the slide body in the up-down direction, and the tip of the slide body forms a first tapered surface whose thickness in the front-rear direction becomes thinner in a portion rearward of the groove portion toward the tip. A door lock device. [Appendix 2] The tip of the slider forms a second tapered surface in which the thickness in the front-rear direction becomes thinner toward the tip in a portion forward of the groove. 2. A door lock device according to claim 1. [Appendix 3] The door is a pair of left and right double doors, The hook members are attached at positions where the pair of left and right doors are butted against each other, The pair of left and right sliding mechanisms are arranged symmetrically on the left and right sides of the pair of left and right doors, one for each door, with the hook member at the center. 3. A door lock device according to claim 1 or 2. [Appendix 4] The through hole is provided at a position overlapping a screw hole for fixing the case body to the lower end surface of the door when viewed from above and below. 4. A door lock device according to any one of claims 1 to 3. [Appendix 5] The screw holes are arranged in two parallel rows in the left-right direction, The through hole is provided at a position overlapping one of the two screw holes when the sliding body is in a predetermined first state as viewed from the top-bottom direction, and overlapping the other of the two screw holes when the sliding body is in a second state located to one side in the left-right direction from the first state. 5. A door lock device according to any one of claims 1 to 4. [Appendix 6] The through hole is used for two operations: a sliding operation for sliding the slider and a mounting operation for mounting a screw into the screw hole. 6. A door lock device according to any one of claims 1 to 5. [Explanation of symbols]

[0059] 1. Cupboard 1B Bottom plate 1S side plate 1T Top Plate 2L Left door (door) 2R Right door (door) 2X bottom end 3 Hinge 10 Door lock device 11 Screws 12 Screw holes 20,20L Left slide mechanism (slide mechanism) 20,20R Right slide mechanism (slide mechanism) 21 Case body 21A Side part 21B End section 21BH Reinforcement piece 21C Top part 21H Presser piece 21S Stopper piece 22 Slide body 23 Groove 23B Back wall 23F front wall 24, 24B First tapered surface (tapered surface) 24, 24F Second taper surface (taper surface) 25 Coil spring (biasing means) 26 Through hole 27 Foot 30 Hook member 31 Base 32 Engagement surface 33 Extension 34 Screws

Claims

1. A door lock device provided in a cupboard in which an opening provided at the front of a storage space is closed by a hinged door that can be opened and closed in the front-rear direction, a hook member provided on a lower surface side of a bottom plate that forms a bottom surface of the storage space, the hook member having an engagement surface extending along a plane that intersects with a front-rear direction in which the door is opened and closed; a slide mechanism including: a case body fixed to a lower end surface of the door; a slide body accommodated in the case body so as to be slidable in the left-right direction, and disposed on one side of the engagement surface of the hook member in the left-right direction when the door is closed, with a tip facing the engagement surface; a biasing means provided on a base end side of the slide body opposite the tip, and biasing the slide body to the other side in the left-right direction; a groove portion formed in the tip of the slide body in a notch shape along the up-down and left-right directions, the groove portion being engageable with the engagement surface when the door is closed, and a through hole penetrating in the up-down direction on a downward surface of the slide body, and the tip of the slide body forms a first tapered surface whose thickness in the front-rear direction becomes thinner in a portion rearward of the groove portion toward the tip. A door lock device.

2. The tip of the slider forms a second tapered surface in which the thickness in the front-rear direction becomes thinner toward the tip in a portion forward of the groove.

2. The door lock device according to claim 1.

3. The door is a pair of left and right double doors, The hook members are attached at positions where the pair of left and right doors are butted against each other, The pair of left and right sliding mechanisms are arranged symmetrically on the left and right sides of the pair of left and right doors, one for each door, with the hook member at the center.

3. The door lock device according to claim 2.

4. The through hole is provided at a position overlapping a screw hole for fixing the case body to the lower end surface of the door when viewed from above and below.

2. The door lock device according to claim 1.

5. The screw holes are arranged in two parallel rows in the left-right direction, The through hole is provided at a position overlapping one of the two screw holes when the sliding body is in a predetermined first state as viewed from the top-bottom direction, and overlapping the other of the two screw holes when the sliding body is in a second state located to one side in the left-right direction from the first state.

5. The door lock device according to claim 4.

6. The through hole is used for two operations: a sliding operation for sliding the slider and a mounting operation for mounting a screw into the screw hole.

6. The door lock device according to claim 4 or 5.

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