Door locking / unlocking device and door device equipped with this door locking / unlocking device

Abstract

To prevent a door body from undergoing opening movement when the door body is pushed at both sides of the door body.SOLUTION: A door engaging / disengaging device A provided in a door device 1 whose door body 20 can be opened when rotated to either one side or the other side is configured such that, in conjunction with a rotational operation of two knobs 51 and 52 respectively, a latch 32 in the protruding state is retracted and a first engagement portion 41 or a second engagement portion 42 on the same side as one of the knobs that was brought into rotational operation is protruded so as to be in close proximity to an engagement convex 12b.SELECTED DRAWING: Figure 4

Description

Technical Field

[0005] , , ,

[0001] The present invention relates to a door engaging and disengaging device that immerses a latch by operating a knob to release an engaged state, and a door device provided with this door engaging and disengaging device.

Background Art

[0002] Conventionally, some door devices are configured to allow a door body to rotate both toward the back side and the front side, as described in, for example, Patent Document 1. In this door device, the butt portion of the door body and the opposing vertical frame are connected by a loose hinge. The loose hinge has rotation shafts on one side and the other side in the door thickness direction, and the two rotation shafts enable the door body to be opened in both directions.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, according to the above prior art, when a person is on one side of the door body and the door body is pushed and opened from the other side, there is a risk that the opened door body may collide with the person on the one side.

Means for Solving the Problems

[0005] In view of such problems, the present invention has the following configuration. A door locking / unlocking device provided on a door device that can be rotated and opened on either one or the other side, comprising: a latch that extends and retracts from the door body toward the door edge; knobs exposed on one and the other side in the thickness direction of the door body; a first locking / unlocking portion that extends and retracts from the door body toward the door edge on the one side of the latch; a second locking / unlocking portion that extends and retracts from the door body toward the door edge on the other side of the latch; an engaging projection provided on a fixed portion of the door body facing the door edge so as to be close to either the first locking / unlocking portion or the second locking / unlocking portion when protruding; and a concave latch receiving portion provided on the engaging projection so as to fit into the latch when protruding, wherein the latch retracts in its protruding state in conjunction with the rotational operation of each of the two knobs, and the first locking / unlocking portion or the second locking / unlocking portion on the same side as the rotated knob is moved into the engaging projection. In contrast, from the same side as the knob that was rotated in the expected direction Protrude so that it is close by The rotational force is not transmitted between the knob on one side and the knob on the other side. A door locking / unlocking device characterized by the following features. Furthermore, the present invention comprises the following configurations. A door locking / unlocking device provided on a door device that can be rotated and opened to either one side or the other, comprising: a latch that extends and retracts from the door body toward the door edge; knobs exposed on one and the other side in the thickness direction of the door body; a first locking / unlocking portion that extends and retracts from the door body toward the door edge on the one side of the latch; a second locking / unlocking portion that extends and retracts from the door body toward the door edge on the other side of the latch; an engaging projection provided on a fixed portion of the door body facing the door edge so as to be close to either the first locking / unlocking portion or the second locking / unlocking portion when protruding; and a concave latch receiving portion provided on the engaging projection so as to fit into the latch when protruding, and the device operates in conjunction with the rotational operation of each of the two knobs, A door locking and unlocking device characterized in that, when the knob on one side is rotated, the rotational force of the first rotational force of the second first rotational force of the first rotational force of the first rotational force of the first rotational force of the first rotational force of the first rotational force of the first rotational force of the first rotational force of the first rotational force of the first rotational force of the first rotational force of the first rotational [Effects of the Invention]

[0006] As described above, the present invention is configured in such a way that it can prevent the door from being pushed and opened on both sides of the door. [Brief explanation of the drawing]

[0007] [Figure 1] This is a front view showing a door device equipped with an example of a door locking / unlocking device according to the present invention. [Figure 2] This is a cross-sectional view along the line (II)-(II) in Figure 1. [Figure 3] This is a cross-sectional view along the line (III)-(III) in Figure 1. [Figure 4] This diagram shows the same cross-section with one of the knobs rotated. [Figure 5] This diagram shows the same cross-section with the knob on the other side rotated. [Figure 6] This is a cross-sectional view along the line (VI)-(VI) in Figure 2. [Modes for carrying out the invention]

[0008] This embodiment discloses the following features: The first feature is a door locking / unlocking device provided on a door device that can be rotated and opened on either one or the other side of the door body, comprising: a latch that extends and retracts from the door body toward the door edge; knobs exposed on one and the other side in the thickness direction of the door body; a first locking / unlocking portion that extends and retracts from the door body toward the door edge on the one side of the latch; a second locking / unlocking portion that extends and retracts from the door body toward the door edge on the other side of the latch; an engaging projection provided on a fixed portion of the door body facing the door edge so as to be close to either the first locking / unlocking portion or the second locking / unlocking portion when protruding; and a concave latch receiving portion provided on the engaging projection so as to fit into the latch when protruding, wherein the latch is retracted in its protruding state in conjunction with the rotation operation of each of the two knobs, and the first locking / unlocking portion or the second locking / unlocking portion on the same side as the rotated knob is made to protrude toward the engaging projection (see Figures 1 to 6).

[0009] A second feature is that rotational force is not transmitted between the knob on one side and the knob on the other side (see Figures 4 and 5).

[0010] A third feature is that it is equipped with a first rotating shaft that rotates integrally with the knob on one side and a second rotating shaft that rotates integrally with the knob on the other side. When the knob on one side is rotated, the rotational force of the first rotating shaft causes the first engagement / disengagement portion to protrude and the latch to retract. When the knob on the other side is rotated, the rotational force of the second rotating shaft causes the second engagement / disengagement portion to protrude and the latch to retract (see Figures 4 and 5).

[0011] As a fourth feature, a third rotating shaft for immersing the latch by a rotational force is provided between the first rotating shaft and the second rotating shaft. Between the first rotating shaft and the third rotating shaft, a first clutch mechanism is provided that transmits only the one-way rotational force of the first rotating shaft accompanying the opening operation by the knob on one side to the third rotating shaft. Between the second rotating shaft and the third rotating shaft, a second clutch mechanism is provided that transmits only the one-way rotational force of the second rotating shaft accompanying the opening operation by the knob on the other side to the third rotating shaft (see FIGS. 2 to 6).

[0012] As a fifth feature, a first gear and a second gear are provided on the first rotating shaft and the second rotating shaft respectively, and a first advancing / retreating gear that meshes with the first gear and advances / retreats and a second advancing / retreating gear that meshes with the second gear and advances / retreats are provided on the first engaging / detaching portion and the second engaging / detaching portion respectively. The first engaging / detaching portion and the second engaging / detaching portion are made to move in and out by the advancement / retreat of the first advancing / retreating gear and the second advancing / retreating gear respectively (see FIG. 2).

[0013] As a sixth feature, a third gear is provided on the third rotating shaft, and a third advancing / retreating gear that meshes with the third gear and advances / retreats is provided on the latch, and the latch is made to move in and out as the third advancing / retreating gear advances / retreats (see FIGS. 2 and 6).

[0014] As a seventh feature, a biasing member for biasing the latch in the protruding direction is provided (see FIGS. 3 to 6).

[0015] An eighth feature is that a door device is configured by including the above door engaging / detaching device (see FIG. 1).

[0016] <Specific Embodiment> Next, a specific embodiment having the above features will be described in detail based on the drawings. In the following description, the "door width direction" means the lateral width direction of the door body 20. Also, the "door thickness direction" means the thickness direction of the door body 20 that is substantially orthogonal to the door width direction. The "detection direction" means the lateral direction of the frame body 10 (the left-right direction according to FIG. 1). Further, the "expected direction" means the direction of the frame thickness that is substantially orthogonal to the "detection direction".

[0017] FIG. 1 shows an example of a fitting device according to the present invention. The door device 1 includes a frame body 10 having an opening on the inner side, a door body 20 that closes the opening in an openable manner, and a door engaging-and-disengaging device A that engages and disengages the leading end side of the door body 20 with respect to the frame body 10. This door device 1 is a door in which the door body 20 rotates and opens on either one side or the other side in the door thickness direction, and has a basic structure of a door called a swing door, a counter door, a western door, a battary, a free door, etc.

[0018] The frame body 10 includes a trailing end side frame member 11 that faces the trailing end portion of the door body 20 in the closed state, a leading end side frame member 12 that faces the leading end portion of the door body 20 in the closed state, and an upper side frame member where the upper end portion of the door body 20 in the closed state faces, and is configured in an inverted concave shape in a front view surrounding the opening on the central side. This frame body 10 is fixed to an opening in a building wall surface or the like that is an installation target of the door device 1.

[0019] The lower side of the frame body 10 may be a floor surface or a ground surface, or may be a threshold (lower frame member) or the like extending between the lower end portions of the trailing end side frame member 11 and the leading end side frame member 12.

[0020] The leading end side frame member 12 has a long vertical frame body 12a extending in the vertical direction and an engaging convex portion 12b that protrudes from the vertical frame body and faces the door body 20 in the fully closed state, and is formed in a long shape continuously in the vertical direction by, for example, a metal material (see FIGS. 3 to 5).

[0021] The vertical frame body 12a is formed in a long shape extending between the lower side surface such as a floor surface and the upper side frame member 13, and according to the illustrated example, the surface facing the leading end portion of the door body 20 is formed in a flat shape.

[0022] The engaging convex portion 12b protrudes from the facing surface in the vertical frame body 12a. This engaging projection 12b is located between the first engaging portion 41 and the second engaging portion 42 in the door thickness direction, and is in close proximity to either the first engaging portion 41 or the second engaging portion 42 when either of them protrudes.

[0023] The engaging projection 12b is provided with a latch receiving portion 12c, which has a concave cross-section (a groove-like concave shape in the illustrated example) so as to fit onto the latch 32 when it protrudes.

[0024] In the illustrated example, the engaging projection 12b and the latch receiving portion 12c are formed in an elongated shape that extends substantially along the entire length of the door frame member 12. Furthermore, the engaging projection 12b only needs to be at a height corresponding to at least the first engagement / disengagement portion 41 and the second engagement / disengagement portion 42, which will be described later, and the latch receiving portion 12c only needs to be at a height corresponding to at least the latch, which will be described later. Therefore, these engaging projections 12b and latch receiving portions 12c can also be provided partially in the vertical direction.

[0025] Furthermore, although the vertical frame body 12a and the engaging projection 12b are shown as a single unit in the illustrated example, in other examples, it is possible to have a configuration in which a separate engaging projection 12b is integrally connected to the vertical frame body 12a.

[0026] The door body 20 is constructed by supporting two outer panels 21 spaced apart in the thickness direction with an inner core material and structural members (not shown) to form a rectangular door body with a predetermined thickness when viewed from the front. Furthermore, the door front surface of the door body 20 is provided with through holes for extending and retracting the latch 32, the first engagement / disengagement part 41, and the second engagement / disengagement part 42, which will be described later. As shown in Figure 3, a concealed plate 22 is provided on the leading edge side of the door body 20, extending from each outer panel 21 toward the leading edge, as needed. This concealed plate 22 extends continuously in the vertical direction to conceal the gap between the leading edge surface of the door body 20 and the vertical frame body 12a, as well as the engaging projection 12b, etc. This concealed plate 22 is made of an elastic material such as rubber, making it deformable, or its protrusion toward the leading edge is appropriately adjusted, so as not to interfere with the engaging projection 12b and hinder the opening and closing operation of the door body 20.

[0027] The door body 20, configured as described above, opens the opening in the frame body 10 by rotating it to one side or the other side in the door thickness direction, and closes the opening by rotating it in the opposite direction.

[0028] The tail end portion of the door body 20 is rotatably supported on the frame body 10 via a shaft-like member 23 such as a free hinge (see Figure 1). The door body 20 can rotate in both directions in the door thickness direction, with this shaft-like member 23 as its central axis.

[0029] The door locking / unlocking device A consists of a door knob unit 30 located on the door edge side of the door body 20, and an engagement projection 12b and a latch receiving portion 12c, etc., which are integrated with the vertical frame body 12a, which is a fixed part.

[0030] The door knob unit 30 comprises a base 31 mounted on the door edge side inside the door body 20, a latch 32 that extends and retracts toward the door edge from the base 31 and the door body 20, a biasing member 33 that biases the latch 32 in the protruding direction, a first engagement / disengagement portion 41 that extends and retracts toward the door edge from the base 31 and the door body 20 on one side of the door thickness direction relative to the latch 32, a second engagement / disengagement portion 42 that extends and retracts toward the door edge from the door body 20 on the other side of the door thickness direction relative to the latch 32, and knobs 51 and 52 that are exposed on one and the other side of the door body 20 in the thickness direction.

[0031] Furthermore, the door knob unit 30 includes a first rotation axis 61 that rotates integrally with the knob 51 on one side, a second rotation axis 62 that rotates integrally with the knob 52 on the other side, and a third rotation axis 63 that retracts the latch 32 by rotational force between the first rotation axis 61 and the second rotation axis 62.

[0032] Furthermore, the door knob unit 30 includes a first clutch mechanism 71 that transmits only the unidirectional rotational force of the first rotating shaft 61 to the third rotating shaft 63 in conjunction with the opening operation by the knob 51 on one side, between the first rotating shaft 61 and the third rotating shaft 63, and a second clutch mechanism 72 that transmits only the unidirectional rotational force of the second rotating shaft 62 to the third rotating shaft 63 in conjunction with the opening operation by the knob 52 on the other side, between the second rotating shaft 62 and the third rotating shaft 63.

[0033] According to the illustrated example, the base body 31 is formed in the shape of a hollow box. The wall portion of the base 31 on the door-side is provided with through holes for extending and retracting the latch 32, the first engagement / disengagement portion 41, and the second engagement / disengagement portion 42, respectively. Furthermore, through holes are provided in one wall portion and the other wall portion of the base 31, respectively, for inserting the first rotating shaft 61 and the second rotating shaft 62.

[0034] The latch 32 is formed in a long, block-like shape in the door width direction. The end of the latch 32 in the door edge direction gradually narrows in width in a horizontal trapezoidal shape in cross-section due to tapered surfaces 32b and 32c on both sides in the door thickness direction. Each tapered surface 32b and 32c can be an inclined flat surface or an inclined convex curved surface, etc.

[0035] A third reciprocating gear 32a, which moves back and forth in conjunction with a third gear 66 (described later), is integrally provided on the lower side of this latch 32. The third reciprocating gear 32a has multiple teeth in the direction in which the latch 32 extends and retracts, and these teeth are oriented downwards (see Figures 2 and 6). This third reciprocating gear 32a may be machined integrally with the latch 32, or it may be a separate component that is integrally connected to the latch 32. This latch 32 is guided by a guide member (not shown) so that it slides in the door width direction. Therefore, as the third gear 66 rotates, the third reciprocating gear 32a moves forward and backward, and the latch 32 moves in conjunction with this movement.

[0036] The biasing member 33 can be any member that biases the latch 32 toward the door edge relative to the base 31, and in the illustrated example, it is a compression coil spring provided between the latch 32 and the door edge side wall of the base 31. Other examples of this biasing member 33 include a tension spring that pulls the latch 32 toward the door edge, and a torsion spring that rotates the third gear 66 in one direction to bias the latch 32 toward the door edge.

[0037] The first engagement / disengagement portion 41 is formed in a long, block-like shape in the door width direction, and integrally has a first reciprocating gear 41a on its lower side that meshes with the first gear 64 and moves back and forth. The first reciprocating gear 41a has multiple teeth in the direction in which the first engagement / disengagement portion 41 extends and retracts, and these teeth are facing upward (see Figure 2). This first engaging / disengaging portion 41 is guided by a guide member (not shown) so as to slide in the door width direction. Therefore, as the first reciprocating gear 41a moves forward and backward in conjunction with the rotation of the first gear 64, the first engagement / disengagement part 41 moves in and out in conjunction with this movement.

[0038] The second engagement / disengagement portion 42 is formed in a long, block-like shape in the door width direction, and integrally has a second reciprocating gear 42a on its lower side that meshes with the second gear 65, which will be described later, to move forward and backward. The second reciprocating gear 42a has multiple teeth in the direction in which the second engagement / disengagement portion 42 extends and retracts, and these teeth are facing upward (see Figure 2). The second engagement / disengagement portion 42 is then guided by a guide member (not shown) so as to slide in the door width direction. Therefore, as the second gear 65 rotates, the second reciprocating gear 42a moves forward and backward, and the second engagement / disengagement part 42 moves in conjunction with this movement.

[0039] Furthermore, the first engagement / disengagement portion 41 and the second engagement / disengagement portion 42 can use common parts. Furthermore, the first and second engagement / disengagement parts 41 and 42 in the illustrated example have common chamfers (C-chamfers or R-chamfers) on the corners near the door edge, and their shape differs from that of the first engagement / disengagement part 41. However, in other examples besides the illustrated example, it is also possible to make the first engagement / disengagement part 41, the second engagement / disengagement part 42, and the latch 32 all common parts.

[0040] One of the knobs 51 protrudes from the outer panel 21 on one side of the door body 20 and is rotated from the outside. A first rotating shaft 61, which will be described later, is fixed to the rotating shaft portion of this knob 51 so as to be able to rotate together. In the figure, reference numeral 51a denotes a round base that is fixed to the outer plate 21 so as to cover the rotating shaft portion of one of the knobs 51.

[0041] The knob 52 on the other side protrudes from the other side of the outer panel 21 of the door body 20 and is rotated from the outside. A second rotation shaft 62, which will be described later, is fixed to the rotation shaft portion of this knob 52 so as to be rotatable together. In the figure, reference numeral 52a denotes a round base that is fixed to the outer plate 21 so as to cover the rotating shaft portion of one of the knobs 51.

[0042] The first rotating shaft 61 has one end that penetrates the base 31 and the outer plate 21, and the knob 51 on one end is detachably connected to the other end. One half of the first clutch mechanism 71 is connected to the other side of the first rotating shaft 61. This first rotating shaft 61 is rotatably supported by a bearing member (not shown) within the base 31.

[0043] A first gear 64 (a pinion gear, as shown in the illustrated example) is fixed to the center of the first rotating shaft 61 so as to be able to rotate together with it. The first gear 64 is arranged coaxially with the first rotating shaft 61 and meshes with the first reciprocating gear 41a (a rack gear in the illustrated example).

[0044] The second rotating shaft 62 has one end that penetrates the base 31 and the outer plate 21 relative to the first end, and the knob 52 on the other end is detachably connected to the other end. One half of the second clutch mechanism 72 is connected to the aforementioned side of the second rotating shaft 62. This second rotating shaft 62 is rotatably supported by a bearing member (not shown) within the base 31.

[0045] A second gear 65 (a pinion gear, as shown in the illustration) is fixed to the second rotating shaft 62 near its center so as to be able to rotate together with it. The second gear 65 is positioned coaxially with the second rotating shaft 62 and meshes with the second reciprocating gear 42a (a rack gear in the illustrated example).

[0046] The first clutch mechanism 71 comprises a coaxially arranged half and the other half, and is configured to transmit only the rotational force of the one half in one direction to the other half. This first clutch mechanism 71 can be fitted with a clutch mechanism such as a one-way clutch or a freewheel. One half of the first clutch mechanism 71 is rotatably connected to the other end of the first rotating shaft 61. The other half of the first clutch mechanism 71 is rotatably connected to the one end of the third rotating shaft 63.

[0047] According to the first clutch mechanism 71, the rotational force of the first rotating shaft 61 in one direction (clockwise when viewed from one side in the door thickness direction, as shown in the illustrated example) associated with the release operation by the knob 51 on one side is transmitted to the third rotating shaft 63 and the third gear 66. However, the rotational force applied by the knob 51 on one side in the reverse direction (counterclockwise when viewed from one side in the door thickness direction, as shown in the illustrated example) is not transmitted to the third rotating shaft 63 and the third gear 66.

[0048] Furthermore, the second clutch mechanism 72 is configured, similar to the first clutch mechanism 71, to transmit only the rotational force of one half in one direction to the other half. This second clutch mechanism 72 can be provided using components with the same configuration as the first clutch mechanism 71, but in the opposite direction in the door thickness direction. One half of the second clutch mechanism 72 is rotatably connected to one end of the second rotating shaft 62. The other half of the second clutch mechanism 72 is rotatably connected to the other end of the third rotating shaft 63.

[0049] According to the second clutch mechanism 72, the rotational force of the second rotating shaft 62 in one direction (counterclockwise when viewed from the other side in the door thickness direction, as shown in the illustrated example) associated with the release operation by the knob 52 on the other side is transmitted to the third rotating shaft 63 and the third gear 66. However, the rotational force in the reverse direction (clockwise when viewed from the other side in the door thickness direction, as shown in the illustrated example) from the knob 52 on the other side is not transmitted to the third rotating shaft 63 and the third gear 66.

[0050] The third rotating shaft 63 is coaxially positioned between the first rotating shaft 61 and the second rotating shaft 62, and is rotatably supported by the base body 31 via a bearing member or the like (not shown). A third gear 66 (a pinion gear, as shown in the illustration) is fixed to the center of this third rotating shaft 63 so as to be able to rotate together with it. The third gear 66 is positioned coaxially with the third rotating shaft 63 and meshes with the third reciprocating gear 32a (a rack gear in the illustrated example).

[0051] The door knob unit 30 with the above configuration is fixed inside the door body 20 so as to abut against the back surface of the door edge side wall of the door body 20.

[0052] Next, the characteristic functions and effects of the door device 1 and door locking / unlocking device A with the above configuration will be explained in detail. First, in the initial state where the door body 20 is closing the opening, as shown in Figure 3, the latch 32 protrudes toward the door edge due to the biasing force of the biasing member 33 and engages with the latch receiving portion 12c of the door edge side frame member 12, while the first engagement / disengagement portion 41 and the second engagement / disengagement portion 42 are retracted into the door body 20.

[0053] In the initial state described above, for example, as shown in Figure 4, when one of the knobs 51 is rotated clockwise, the first rotating shaft 61 and the first gear 64 rotate in conjunction with this rotation. Therefore, the first engagement / disengagement portion 41, located on the same side as the rotated knob 51, protrudes due to the rotational force of the first gear 64 and approaches the engagement projection 12b from one side in the projection direction.

[0054] Furthermore, the rotational force in the first engagement / disengagement section 41 is transmitted to the third rotating shaft 63 via the first clutch mechanism 71, causing the third rotating shaft 63 and the third gear 66 to rotate in the same direction as the first rotating shaft 61 (clockwise in the illustrated example). Therefore, the rotational force of the first rotating shaft 61 causes the latch 32 to retract and sink into the door body 20.

[0055] At the other end of the third rotating shaft 63, the second clutch mechanism 72 is positioned in the opposite direction to the first clutch mechanism 71. Therefore, the rotational force of the third rotating shaft 63 is not transmitted to the second rotating shaft 62 via the second clutch mechanism 72. In other words, no rotational force is transmitted between the knob 51 on one side and the knob 52 on the other side. Therefore, the second engagement / disengagement part 42 maintains its immersed state.

[0056] Therefore, anyone attempting to open the door 20 by rotating the knob 51 on one side can only pull the door 20 towards them to open it. In other words, any attempt to push the door 20 forward to open it is blocked by the first engagement / disengagement portion 41 contacting the engagement projection 12b.

[0057] Then, after the door body 20 is opened, if the rotational force applied to the knob 51 on one side is released, the latch 32 protrudes due to the biasing force of the biasing member 33, and in conjunction with this, the first engagement / disengagement part 41 retracts.

[0058] Furthermore, when the door body 20, which is in the open position with the latch 32 protruding, is pushed in the closing direction, the latch 32 slides its tapered surface 32b or 32c against the engaging projection 12b, and engages with the latch receiving portion 12c by overcoming the engaging projection 12b. Therefore, the door body 20 remains stationary so as not to open to either one side or the other.

[0059] Furthermore, in the initial state described above, for example, as shown in Figure 5, when the knob 52 on the other side is rotated counterclockwise when viewed from the other side, the second rotating shaft 62 and the second gear 65 rotate in conjunction with this rotation, and this rotational force is transmitted to the third rotating shaft 63 and the third gear 66 via the second clutch mechanism 72, but not to the first rotating shaft 61 and the first gear 64, the knob 51 on the one side, etc. Therefore, the second engagement / disengagement portion 42, located on the same side as the other knob 52 that has been rotated, protrudes and approaches the engagement projection 12b from the other side in the projection direction, and the latch 32 retracts. Therefore, anyone attempting to open the door 20 by turning the knob 52 on the other side can only pull the door 20 towards them to open it. Pushing the door 20 forward to open it is blocked by the contact between the second engagement / disengagement portion 42 and the engaging projection 12b.

[0060] Therefore, with the door device 1 and door locking / unlocking device A configured as described above, on either side of the door body 20, only opening towards the front by pulling the door body 20 is possible, and opening towards the back by pushing the door body 20 is prevented.

[0061] In the above embodiment, the mechanical configuration within the base 31 retracts the protruding latch 32 in conjunction with the rotational operation of the two knobs 51 and 52, and causes the first engagement / disengagement portion 41 or the second engagement / disengagement portion 42, located on the same side as the rotated knob, to protrude closer to the engagement projection 12b. However, in other examples, similar operation can also be achieved by a configuration equipped with an electromagnetic solenoid and a control circuit, etc.

[0062] Furthermore, in the above embodiment, the first gear 64 and the first reciprocating gear 41a, the second gear 65 and the second reciprocating gear 42a, and the third gear 66 and the third reciprocating gear 32a are arranged in a rack and pinion mechanism. However, this mechanism can be any mechanism that converts rotational motion into linear motion. As an example, a mechanism in which a worm gear moves the rack gear forward and backward is also possible. In yet another example, a mechanism can be made by appropriately combining a rack gear, pinion gear, worm gear, sprocket, bevel gear, etc.

[0063] The present invention is not limited to the embodiments described above and can be modified as appropriate without altering the essence of the invention. [Explanation of Symbols]

[0064] 1: Door device 10:Frame body 12: Door frame member 12b: Engagement protrusion 12c: Latch receiver 20: Door Body 30: Door knob unit 31: Base 32: Latch 32a: Third reciprocating gear 33: Biasing member 41: First part of the attachment 41a: First reciprocating gear 42: Second part of the clause 42a: Second reciprocating gear 51: One side knob 52: The knob on the other side 61: First axis of rotation 62: Second axis of rotation 63: Third axis of rotation 64: The First Cog 65: The Second Gear 71: First clutch mechanism 72: Second clutch mechanism A: Door locking / unlocking device

Claims

1. A door locking / unlocking device provided in a door device that allows the door body to rotate and open to either one side or the other side, The door comprises a latch that extends and retracts from the door body toward the door edge, a knob exposed on one side and the other side in the thickness direction of the door body, a first engagement / disengagement portion that extends and retracts from the door body toward the door edge on one side of the latch, a second engagement / disengagement portion that extends and retracts from the door body toward the door edge on the other side of the latch, an engaging projection provided on a fixed portion of the door body facing the door edge so as to be close to either the first engagement / disengagement portion or the second engagement / disengagement portion when it is protruding, and a concave latch receiving portion provided on the engaging projection so as to fit into the latch when it is protruding. In conjunction with the rotation of each of the two knobs, the protruding latch is retracted, and the first or second engagement portion on the same side as the rotated knob is made to protrude from the same side as the rotated knob in the direction of engagement, A door locking / unlocking device characterized in that rotational force is not transmitted between one knob and the other knob.

2. A door locking / unlocking device provided in a door device that allows the door body to be rotated to either one side or the other side and opened, The door comprises a latch that extends and retracts from the door body toward the door edge, a knob exposed on one side and the other side in the thickness direction of the door body, a first engagement / disengagement portion that extends and retracts from the door body toward the door edge on one side of the latch, a second engagement / disengagement portion that extends and retracts from the door body toward the door edge on the other side of the latch, an engaging projection provided on a fixed portion of the door body facing the door edge so as to be close to either the first engagement / disengagement portion or the second engagement / disengagement portion when it is protruding, and a concave latch receiving portion provided on the engaging projection so as to fit into the latch when it is protruding. In conjunction with the rotation of each of the two knobs, the protruding latch is retracted, and the first or second engagement portion on the same side as the rotated knob is made to protrude from the same side as the rotated knob in the direction of engagement, It comprises a first rotating shaft that rotates integrally with the knob on one side, and a second rotating shaft that rotates integrally with the knob on the other side, When the knob on one side is rotated, the rotational force of the first rotating shaft causes the first engagement / disengagement portion to protrude and the latch to retract. A door locking / unlocking device characterized in that, when the knob on the other side is rotated, the rotational force of the second rotating shaft causes the second locking / unlocking portion to protrude and the latch to retract.

3. A third rotating shaft is provided between the first rotating shaft and the second rotating shaft, which retracts the latch by rotational force. Between the first rotating shaft and the third rotating shaft, a first clutch mechanism is provided that transmits only the rotational force of the first rotating shaft in one direction to the third rotating shaft when the knob on one side is released. The door locking / unlocking device according to claim 2, characterized in that a second clutch mechanism is provided between the second rotating shaft and the third rotating shaft, which transmits only the rotational force of the second rotating shaft in one direction to the third rotating shaft when the knob on the other side is opened.

4. The door locking and unlocking device according to claim 2 or 3, characterized in that a first gear and a second gear are provided on the first rotating shaft and the second rotating shaft, respectively, and a first reciprocating gear that meshes with the first gear and moves back and forth and a second reciprocating gear that meshes with the second gear and moves back and forth are provided on the first locking and unlocking section and the second locking and unlocking section, respectively, and the first locking and unlocking section and the second locking and unlocking section move in and out by the movement of the first reciprocating gear and the second reciprocating gear, respectively.

5. The door locking / unlocking device according to claim 3, characterized in that a third gear is provided on the third rotating shaft, and a third reciprocating gear is provided on the latch that meshes with the third gear and moves back and forth, and the latch moves in and out as the third reciprocating gear moves back and forth.

6. The door locking / unlocking device according to any one of claims 1 to 5, characterized in that a biasing member is provided for biasing the latch in the protruding direction.

7. A door device characterized by comprising a door locking / unlocking device according to any one of claims 1 to 6.

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