Upper and lower split doors

Abstract

With simple operation, it is possible to open and close the upper and lower doors as a single unit, open and close only the upper door, or open and close only the lower door. [Solution] The upper and lower split door 1 is provided with an upper lever handle 21, an upper connecting member 22, and a lifting member 26 that can lift the upper connecting member 22 upward on the upper door 20. The lower door 30 is provided with a lower lever handle 31, a lower connecting member 32, and a lowering member 36 that can pull the lower connecting member 32 downward. The upper connecting member 22 moves from a lower position to an upper position in conjunction with the upward rotation operation of the upper lever handle 21. Also, the lower connecting member 32 moves from an upper position to a lower position in conjunction with the upward rotation operation of the lower lever handle 31. These operations allow the upper door 20 or the lower door 30 to be opened and closed.

Description

Technical Field

[0005] , , ,

[0001] The present disclosure relates to an upper and lower split door including an upper door and a lower door.

Background Art

[0002] Generally, a hinged door installed indoors is composed of a single door material or facing material. By closing operation, the entire opening is blocked to partition living spaces, and by opening operation, the entire opening is opened to allow passage. However, for example, when a hinged door is provided between a living room and a corridor in a house, when the hinged door is opened, in order to block the passage of pets or infants, it is necessary to separately install a pet circle or a baby door. Also, in order to block the line of sight from the entrance side through the corridor, the hinged door must be closed to block the entire opening, and there are inconveniences such as being unable to promote the circulation of the indoor air environment in spring and autumn when air conditioning is not used.

[0003] On the other hand, a hinged door with a configuration in which the door material is divided vertically has also been proposed. For example, in Patent Document 1, the upper door portion and the lower door portion are configured to be separable, and when the connection is released while maintaining the closed state of the lower door portion to prevent the passage of infants, the state of the infants can be visually recognized through the opened upper door portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the configuration of Patent Document 1, when keeping the lower door closed and opening the upper door, the connecting means, including lock pins provided in multiple locations, and the child lock means must be operated individually, and these multiple operations are complicated and time-consuming. Furthermore, the lower door cannot be opened or closed unless it is connected to the upper door, and it is not possible to accommodate usage scenarios where the upper door is closed and the lower door is open.

[0006] The purpose of this disclosure is to provide a split upper and lower door that allows for opening and closing of the upper and lower doors as a single unit, as well as opening and closing of the upper door or the lower door alone, while also simplifying the operation. [Means for solving the problem]

[0007] A solution of the present disclosure for achieving the above objective is a vertically split door having an upper door and a lower door positioned below the upper door, wherein the upper door is provided with a rotatable upper lever handle, an upper connecting member that integrally connects the upper door and the lower door, and a lifting member connected to the upper lever handle and the upper connecting member that can lift the upper connecting member upward, and the lower door is provided with a rotatable lower lever handle, a lower connecting member that integrally connects the lower door and the upper door, and a lifting member connected to the lower lever handle and the lower connecting member that can lift the lower connecting member downward A pull-down member is provided that can be pulled down, and the upper connecting member located in the lower position and the lower connecting member located in the upper position are fitted together and connected to each other. The pull-up member moves the upper connecting member from the lower position to the upper position in conjunction with the upward rotation of the upper lever handle, disengaging the connection with the lower connecting member and allowing the upper door to be opened and closed. The pull-down member moves the lower connecting member from the upper position to the lower position in conjunction with the upward rotation of the lower lever handle, disengaging the connection with the upper connecting member and allowing the lower door to be opened and closed.

[0008] Furthermore, in the upper and lower split door, the upper connecting member has a recess that opens downward, and the lower connecting member has a protrusion that projects upward and fits into the recess. The protrusion of the lower connecting member is provided to protrude beyond the upper edge of the lower door when in the upper position, and is retracted below the upper edge by an upward rotation operation of the lower lever handle.

[0009] Furthermore, in the aforementioned upper and lower split door, it is preferable that the lower connecting member is provided with an elastic member and biased upward, so that it returns from the lower position to the upper position due to the biasing force of the elastic member.

[0010] Furthermore, in the upper and lower split door, the upper connecting member preferably comprises a display portion provided so as to face the visible surface of the upper door and a cover portion that covers the display portion, and the cover portion is preferably provided so as to be slidable in the vertical direction along the display portion.

[0011] Furthermore, in the upper and lower split door, the lower connecting member is provided with a support portion extending upward, and the cover portion is supported from below by the support portion when the upper connecting member and the lower connecting member are connected. Preferably, the cover portion covers the display portion when the upper connecting member is in the upper position, and slides downward to cover the display portion as the lower connecting member moves to the lower position.

[0012] Furthermore, in the upper and lower divided door, it is preferable that the upper connecting member is provided so as to penetrate a support rod whose axial direction is vertical, and so as to be slidable on the support rod and movable in the vertical direction.

[0013] Furthermore, in the aforementioned upper and lower split door, it is preferable that the lower connecting member is provided so as to penetrate a support rod whose axial direction is vertical, and so as to be slidable on the support rod and movable in the vertical direction. [Effects of the Invention]

[0014] According to the present disclosure, in addition to the up-and-down integrated opening and closing of the upper door and the lower door, it is also possible to open and close only the upper door or only the lower door, and the operation can be simplified.

Brief Description of the Drawings

[0015] [Figure 1] It is a front view showing an up-and-down divided door according to an embodiment of the present disclosure. [Figure 2] It is a perspective view showing an upper connecting member and a lower connecting member provided inside the up-and-down divided door. [Figure 3] It is an explanatory drawing showing the states of opening and closing of the upper door in the up-and-down divided door in sequence. [Figure 4] It is an explanatory drawing showing an enlarged view of part A1 in FIG. 3. [Figure 5] It is an explanatory drawing showing an enlarged view of part A2 in FIG. 3. [Figure 6] It is an explanatory drawing showing an enlarged view of part A2 in FIG. 3 and showing the state next to that in FIG. 5. [Figure 7] It is an explanatory drawing showing an enlarged view of part A3 in FIG. 3. [Figure 8] It is an explanatory drawing showing an enlarged view of part A4 in FIG. 3. [Figure 9] It is an explanatory drawing showing an enlarged view of part A5 in FIG. 3. [Figure 10] It is an explanatory drawing showing the states of opening and closing of the lower door in the up-and-down divided door in sequence. [Figure 11] It is an explanatory drawing showing an enlarged view of part B1 in FIG. 10. [Figure 12] It is an explanatory drawing showing an enlarged view of part B2 in FIG. 10. [Figure 13] It is an explanatory drawing showing an enlarged view of part B2 in FIG. 10 and showing the state next to that in FIG. 12. [Figure 14] It is an explanatory drawing showing an enlarged view of part B3 in FIG. 10. [Figure 15] It is an explanatory drawing showing an enlarged view of part B4 in FIG. 10. [Figure 16] It is an explanatory drawing showing an enlarged view of part B5 in FIG. 10. [Modes for carrying out the invention]

[0016] The upper and lower split door according to the embodiment of this disclosure will be described with reference to the drawings.

[0017] Figure 1 is a front view showing the upper and lower split door 1 according to an embodiment. In Figure 1, the upper and lower split door 1 is shown as viewed from inside a living room or the like, and in the figure, the X direction is the width direction (horizontal direction), the Y direction is the front-to-back direction (front side Y1, back side Y2), and the Z direction is the vertical direction.

[0018] As shown in Figure 1, the upper and lower split door 1 is a single-leaf hinged door comprising an upper door 20 and a lower door 30 positioned below the upper door 20. The upper door 20 and the lower door 30 each have flat door panels and are attached to the vertical frame 12 of the opening frame installed in the opening 11 so as to be able to open and close via hinges (not shown). The axis of each hinge extends in the vertical direction Z, and the positions of their respective axes coincide. The opening 11 is provided, for example, between a living room and a corridor connected to that room.

[0019] The upper door 20 is provided with a rotatable upper lever handle 21, and the lower door 30 is provided with a rotatable lower lever handle 31. Both the upper lever handle 21 and the lower lever handle 31 are positioned close to the door edge.

[0020] Furthermore, the leading edge of the upper door 20 and the lower door 30 are each provided with latch devices (not shown) that are independent of the upper lever handle 21 and the lower lever handle 31. The latch devices of the upper door 20 and the lower door 30 can be released by rotating the upper and lower lever handles 21 and 31 downwards, respectively, to retract the protruding latch of the upper door 20 or the lower door 30.

[0021] In this embodiment, the upper and lower split door 1 can be opened and closed as a single unit with the upper door 20 and lower door 30 connected, and it is also possible to open and close the upper door 20 or the lower door 30 separately by disconnecting them. In this case, the mechanism described below allows the upper lever handle 21 or the lower lever handle 31 to be rotated to disconnect or connect the upper door 20 and the lower door 30.

[0022] Figure 2 is a perspective view showing the upper connecting member 22 and the lower connecting member 32 provided inside the upper and lower split door 1. The upper connecting member 22 is provided on the upper door 20 and the lower connecting member 32 is provided on the lower door 30, but in this figure, the upper door 20 and the lower door 30 are represented by dashed lines (imaginary lines) to make the upper connecting member 22 and the lower connecting member 32 easier to see.

[0023] As shown in the figure, the upper door 20 is provided with an upper lever handle 21, and an upper connecting member 22 is provided below its pivot axis 211. The upper lever handle 21 is rotatable about a pivot axis 211 that extends in the front-rear direction Y. The upper lever handles 21 are located on the front side Y1 and the rear side Y2 of the upper door 20, respectively.

[0024] The lower door 30 is provided with a lower lever handle 31, and a lower connecting member 32 is provided above its pivot axis 311. The lower lever handle 31 is rotatable around a pivot axis 311 that extends in the front-rear direction Y. The lower lever handles 31 are located on the front side Y1 and the rear side Y2 of the lower door 30, respectively.

[0025] The upper connecting member 22 and the lower connecting member 32 are located in an internal storage space 40 that spans the upper door 20 and the lower door 30. The upper connecting member 22 is located inside the upper door 20, in the upper half of the storage space 40. The lower connecting member 32 is located inside the lower door 30, in the lower half of the storage space 40.

[0026] The upper connecting member 22 is formed by providing a recess 24 in the main body 23. In the exemplary embodiment, the main body 23 of the upper connecting member 22 is formed in a block or box shape with a substantially rectangular cross-section, and the recess 24 is provided opening on the lower side of the main body 23. The recess 24 is formed in a groove shape extending in the width direction X with a substantially rectangular cross-section. A support rod 41 is provided passing through the axial center of the main body 23, with the vertical direction Z as its axial direction, supporting the main body 23 within the storage space 40 and restricting the range of movement of the main body 23 in the vertical direction Z.

[0027] In the state shown in Figure 2, the protrusion 34 of the lower connecting member 32 is fitted into the recess 24 of the upper connecting member 22 from below. The lower connecting member 32 has a protrusion 34 above the main body 33. The protrusion 34 is provided in an upward-facing convex shape so as to fit into the recess 24 of the upper connecting member 22, and has an outer shape with a substantially rectangular cross-section corresponding to the shape of the recess 24.

[0028] While the diagram illustrates a configuration in which the recess 24 of the upper connecting member 22 and the protrusion 34 of the lower connecting member 32 have a substantially rectangular cross-section that allows them to fit together, this disclosure is not limited to such a configuration. For example, a cylindrical protrusion may be fitted into a cylindrical recess. Furthermore, the shapes of the upper connecting member 22 and the lower connecting member 32 are not limited to those shown in the diagram and may be any shape.

[0029] A support rod 42, with its axial direction Z, is provided penetrating the axial center of the main body portion 33 of the lower connecting member 32. The main body portion 33 of the lower connecting member 32 is provided so as to be movable in the vertical direction Z by sliding on the support rod 42. The support rod 42 supports the main body portion 33 within the storage space 40 and restricts the range of movement of the main body portion 33 in the vertical direction Z.

[0030] Furthermore, the lower connecting member 32 is equipped with an elastic member and is biased upward. In the exemplary embodiment, the elastic member is a spring member 37, such as a coil spring (compression spring), which is externally mounted around the support rod 42 that penetrates the lower part of the main body 33. The spring member 37 is disposed within the storage space 40 between the lower surface of the main body 33 and the lower end of the support rod 42.

[0031] The main body 33 is normally biased upward by the biasing force of the spring member 37. The main body 33 is capable of moving downward against the biasing force of the spring member 37, and returning to the upward position due to the biasing force.

[0032] In the state shown in Figure 2, the upper connecting member 22 is in a lower position and is able to move upward along the support rod 41. In contrast, the lower connecting member 32 is in an upper position and is able to move downward along the support rod 42. The recess 24 and the protrusion 34 are fitted together, connecting the upper connecting member 22 and the lower connecting member 32. The upper door 20 and the lower door 30 are connected.

[0033] In the upper connecting member 22, a display section 25 is provided on the outer surface of the main body 23. More specifically, the display section 25 is located on the outer surface side of the recess 24 and is provided on two visible surfaces of the main body 23 (the front visible surface on the Y1 side and the rear visible surface on the Y2 side).

[0034] These display units 25 are positioned to face the visible surface of the upper door 20. When the upper door 20 and the lower door 30 are connected, that is, when the upper connecting member 22 and the lower connecting member 32 are joined, the display units 25 are positioned to be visible on the visible surface of the upper and lower split door 1. The display units 25 are marked with words such as "Connected" or "Door Integrated" to indicate that the upper door 20 and the lower door 30 are connected.

[0035] The upper connecting member 22 further includes a cover portion 27 that covers the display portion 25. The cover portion 27 is disposed within the storage space 40, on the outside of the visible surface of the main body portion 23, and is slidable in the vertical direction Z along the surface of the display portion 25. In the exemplary embodiment, the cover portion 27 is formed in a flat plate shape and has approximately the same size as the visible surface of the main body portion 23. In the state shown in Figure 2, the cover portion 27 is positioned above the display portion 25, making the display portion 25 visible.

[0036] Such a cover portion 27 is placed on the support portion 35 of the lower connecting member 32 and is supported by the support portion 35 from below. As shown in the figure, the lower connecting member 32 has a columnar support portion 35 extending upward on the main body portion 33. In the exemplary embodiment, two support portions 35 are evenly arranged on the front side Y1 of the main body portion 33 and two on the rear side Y2, and each is erected integrally with the main body portion 33.

[0037] As the main body 33 of the lower connecting member 32 moves downward, the cover portion 27, which is placed on the support portion 35, is also able to move downward together with the support portion 35. Furthermore, as the main body 33 moves upward and the support portion 35 rises, the cover portion 27 is also able to move upward in accordance with it.

[0038] To move the upper connecting member 22 upward, the upper connecting member 22 is further equipped with a lifting member 26 that can pull the main body 23 upward. The upper end of the lifting member 26 is connected to the pivot shaft 211 of the upper lever handle 21, and the lower end is connected to the main body 23. In addition, to move the lower connecting member 32 downward, the lower connecting member 32 is equipped with a lowering member 36 that can pull the main body 33 downward, with the upper end connected to the main body 33 and the lower end connected to the pivot shaft 311 of the lower lever handle 31. Both the lifting member 26 and the lowering member 36 are string-like or wire-like linear members and are inserted through the axial centers of the support rods 41 and 42, respectively.

[0039] As shown in Figure 2, when the upper door 20 and lower door 30 of the split upper door 1 are connected, the upper door 20 and lower door 30 can be opened and closed as a single unit by rotating either one of the upper or lower lever handles 21 or 31 of the upper door 20 or lower door 30 downwards. As shown in Figure 1, the connected state of the upper door 20 and lower door 30 can be easily confirmed by checking the display unit 25, which is visible from the front of the split upper door 1.

[0040] (Opening and closing the upper door) Figure 3 is an explanatory diagram showing the opening and closing of the upper door 20 in the upper and lower split door 1 in sequence, and Figures 4 to 9 are explanatory diagrams showing enlarged views of parts A1 to A5 in Figure 3, respectively. In Figures 4 to 9, for the sake of explanation, the front half of the upper door 20 and lower door 30 in the diagrams is represented by a dashed line (imaginary line), partially showing the internal structure.

[0041] In the upper and lower split door 1, by disconnecting the upper door 20 and the lower door 30, the upper door 20 and the lower door 30 can be opened and closed independently. In this case, the desired door can be opened by operating the lever handle (21, 31) provided on either the upper door 20 or the lower door 30 that you wish to open. For example, to open or close the upper door 20 as shown in Figure 3, the upper lever handle 21 provided on the upper door 20 is rotated.

[0042] As shown in the enlarged view of section A1 in Figure 4, when the upper door 20 and the lower door 30 are connected, the cover section 27 is retracted upward relative to the display section 25, making the display section 25 visible. As mentioned above, the display section 25 has a message such as "Connected," so it is easy to understand that the doors are connected and that an operation to release the connection is necessary.

[0043] Next, as shown in an enlarged view of section A2 in Figure 5, to open the upper door 20, the upper lever handle 21 is rotated. At this time, the upper lever handle 21 is rotated upward. The pivot shaft 211 of the upper lever handle 21 rotates in conjunction, and the lifting member 26 connected to the pivot shaft 211 is wound up onto the pivot shaft 211. As a result, the main body 23 slides upward on the support rod 41 in conjunction with the rotation of the upper lever handle 21. The display unit 25 begins to be hidden behind the cover unit 27.

[0044] As shown in Figure 6, by further rotating the upper lever handle 21, the main body 23 moves to the upper position, and the display unit 25 is covered by the cover unit 27. The upper edge of the cover unit 27 is provided with a protruding locking portion 271 facing toward the main body unit 23. The upper surface of the main body unit 23 locks into the locking portion 271 of the cover unit 27. The recess 24 of the main body unit 23 disengages from the protrusion 34 of the lower connecting member 32. The lower surface of the main body unit 23 and the lower edge of the cover unit 27 can pass above the lower connecting member 32. The upper connecting member 22 is released from the connection with the lower connecting member 32, and the upper door 20 can be opened and closed by pushing and pulling.

[0045] As shown in an enlarged view of section A3 in Figure 7, by pushing the upper door 20, for example, in the rear direction Y2, the upper door 20 is opened independently of the lower door 30. The upper storage space 401 that constitutes the storage space 40 separates from the lower storage space 402 and appears as a recess on the lower edge 201 of the upper door 20. In the lower door 30, the lower connecting member 32 is in an upper position, and the convex portion 34 and the support portion 35 protrude above the upper edge 301 of the lower door 30.

[0046] As shown in the enlarged view of section A4 in Figure 8, with the upper door 20 open, the main body 23 and cover 27 of the upper connecting member 22 return to their lower positions due to their own weight. As the main body 23 descends, the lifting member 26 is pulled downward, causing the upper lever handle 21 to rotate and return to its original state (e.g., horizontal position). The lower surface of the main body 23 is flush with the lower edge 201 of the upper door 20, allowing the upper connecting member 22 to maintain a state where it is not connected to the lower connecting member 32.

[0047] To close the opened upper door 20, the upper lever handle 21 is rotated upward again to move the upper connecting member 22 to the upper position, and the upper door 20 is pulled back in the direction of Y1 towards the front. As a result, as shown in the enlarged view of section A5 in Figure 9, the recess 24 and the protrusion 34 are fitted together, the upper connecting member 22 and the lower connecting member 32 can be reconnected, and the upper door 20 and the lower door 30 are connected. The cover portion 27 is supported by the support portion 35, and the display portion 25 is visible between the left and right support portions 35.

[0048] Thus, the cover portion 27 conceals the display portion 25 when the upper connecting member 22 is in the upper position (Figure 7) and when the upper door 20 is open (Figure 8), while displaying the display portion 25 when the upper door 20 and the lower door 30 are connected (Figures 4 and 9). This prevents incorrect opening and closing operations.

[0049] Furthermore, in the upper and lower split door 1, the upper door 20 is opened by operating the upper lever handle 21, which is easy to understand and operate as it is the operation to open and close the desired door. Moreover, the operation to rotate the upper lever handle 21 to release the connection is an unfamiliar rotation operation, which is to rotate it upwards. Therefore, even if the upper lever handle 21 is rotated downwards, which is the general direction of rotation, when the upper door 20 and the lower door 30 are connected, the connection will not be released, and the connected state can be maintained, preventing the upper door 20 from being opened unintentionally.

[0050] (Opening and closing the lower door) Figure 10 is an explanatory diagram showing the opening and closing of the lower door 30 in the upper and lower split door 1 in sequence, and Figures 11 to 16 are explanatory diagrams showing enlarged views of parts B1 to B5 in Figure 10, respectively. In Figures 11 to 16, the front half of the upper door 20 and lower door 30 at Y1 is represented by a dashed line (imaginary line), partially showing the internal structure.

[0051] To release the connection between the upper door 20 and the lower door 30 and open the lower door 30, the lower lever handle 31 provided on the lower door 30 is rotated. As shown in Figure 11, when the upper door 20 and the lower door 30 are connected, the lower connecting member 32 is in an upper position and the protrusion 34 is provided to protrude beyond the lower door 30. From this state, the lower lever handle 31 is rotated as shown in an enlarged view of part B2 in Figure 12. At this time, the lower lever handle 31 is rotated upward.

[0052] As the lower lever handle 31 rotates, the pivot shaft 311 of the lower lever handle 31 rotates, and the pull-down member 36 connected to the pivot shaft 311 is wound onto the pivot shaft 311. As a result, the main body 33 slides downward along the support rod 42 in conjunction with the rotation of the lower lever handle 31. The spring member 37, which is mounted on the support rod 42, is compressed by the pressure from the main body 33. As the support part 35 moves downward along with the main body 33, the cover part 27 also moves downward following the support part 35. The display part 25 begins to be hidden behind the cover part 27.

[0053] As shown in Figure 13, by rotating the lower lever handle 31 further upward, the pull-down member 36 moves the main body 33 downward in conjunction with the rotation operation. As a result, the main body 33 moves to the lower position within the lower storage space 402. Following the movement of the main body 33 to the lower position, the cover 27 slides downward together with the support 35. The locking portion 271 of the cover 27 locks onto the upper surface of the main body 23, and the display portion 25 is covered by the cover 27. Also, the protrusion 34 of the main body 33 detaches from the recess 24 of the upper connecting member 22. The upper connecting member 22 is released from its connection with the lower connecting member 32, and the upper surface of the protrusion 34 and the upper end surface of the support 35 can pass below the upper connecting member 22, allowing the lower door 30 to be opened and closed freely.

[0054] In this state, by holding the lower lever handle 31 and pushing or pulling the lower door 30, the lower door 30 can be opened and closed independently of the upper door 20. As shown in an enlarged view of section B3 in Figure 14, the protrusion 34 of the lower connecting member 32 is retracted below the upper edge 301 of the lower door 30 by the upward rotation of the lower lever handle 31. For example, by pulling the lower door 30 in the direction Y1 towards the front, the lower door 30 can be opened as shown in the figure.

[0055] As shown in an enlarged view of section B4 in Figure 15, when the lower door 30 is opened, releasing the lower lever handle 31 causes the main body 33 of the lower connecting member 32 to return from the lower position to the upper position due to the biasing force of the spring member 37, and the protrusion 34 and support portion 35 protrude from the upper edge 301 of the lower door 30. The lower connecting member 32 is held in a state where it is not connected to the upper connecting member 22. In addition, in conjunction with the upward movement of the main body 33, the pull-down member 36 is pulled up, and the lower lever handle 31 rotates downward together with the pivot shaft 311 to return to its original state (for example, horizontal position).

[0056] To close the opened lower door 30, rotate the lower lever handle 31 upward again to move the lower connecting member 32 to the lower position, as shown in Figure 14. In this state, return the lower door 30 to the rear direction Y2 and release your hand from the lower lever handle 31. This allows the lower connecting member 32 to be reconnected to the upper connecting member 22, as shown in the enlarged view of section B5 in Figure 16, and the upper door 20 and the lower door 30 become connected. The cover section 27 is supported by the support section 35, and the display section 25 becomes visible.

[0057] Thus, the cover portion 27 conceals the display portion 25 when the lower connecting member 32 is in a lower position (Figure 13) and when the lower door 30 is open (Figure 14), while displaying the display portion 25 when the upper door 20 and the lower door 30 are connected (Figures 11 and 16). This prevents incorrect opening and closing operations.

[0058] Furthermore, in the upper and lower split door 1, the lower lever handle 31 is operated to open the lower door 30, and since this is the operation to open and close the desired door, it is easy to understand and operate. Moreover, the operation to rotate the lower lever handle 31 to release the connection is an unfamiliar operation, such as rotating it upwards. Therefore, even if the lower lever handle 31 is rotated downwards, which is the general direction of rotation, when the upper door 20 and the lower door 30 are connected, the connection will not be released, and the connected state can be maintained, preventing the lower door 30 from being opened unintentionally.

[0059] As described above, the split upper and lower door 1 can be used by opening and closing the upper door 20 and the lower door 30 separately, and can also be operated without any discomfort when used as a single unit, thus enhancing convenience. For example, during periods when air conditioning is used, if hot air from heating or cold air from cooling accumulates in the room, opening either the upper door 20 or the lower door 30 will relieve the accumulation, achieving a half-open state of the split upper and lower door 1 in an energy-efficient manner. Furthermore, during spring and autumn, when air conditioning is not used, opening either the upper door 20 or the lower door 30 will promote air circulation, providing a comfortable indoor environment.

[0060] Furthermore, when the upper door 20 and the lower door 30 are connected, they can be opened and closed together by operating either the upper lever handle 21 or the lower lever handle 31. This allows users to select a lever handle at a height that is easy to use according to their height, making it easier for the elderly and children to open and improving operability.

[0061] This disclosure is not limited to the embodiments described above, and various modifications are possible without departing from the technical essence thereof. All technical matters included in the technical idea described in the claims are subject to this disclosure. The embodiments described above are preferred examples, but various modifications can be realized from the disclosed content, and such modifications are also included in the technical scope described in the claims.

[0062] The following additional information is disclosed regarding the technical details described in the embodiments described above.

[0063] (Note 1) A split door having an upper door and a lower door positioned below the upper door, The upper door is provided with a rotatable upper lever handle, an upper connecting member that integrally connects the upper door and the lower door, and a lifting member connected to the upper lever handle and the upper connecting member that can lift the upper connecting member upward. The lower door is provided with a rotatable lower lever handle, a lower connecting member that integrally connects the lower door and the upper door, and a lowering member connected to the lower lever handle and the lower connecting member, which is capable of pulling the lower connecting member downward. The upper connecting member located in the lower position and the lower connecting member located in the upper position are fitted together and joined to each other. The lifting member moves the upper connecting member from a lower position to an upper position in conjunction with the upward rotation of the upper lever handle, thereby disengaging the connection with the lower connecting member and allowing the upper door to be opened and closed. The aforementioned lowering member moves the lower connecting member from an upper position to a lower position in conjunction with the upward rotation of the lower lever handle, thereby disengaging the connection with the upper connecting member and allowing the lower door to be opened and closed freely.

[0064] (Note 2) The upper and lower split door as described in Appendix 1, The upper connecting member has a recess that opens downward, The lower connecting member has a protrusion that is projected upward and fits into the recess, The protrusion of the lower connecting member is provided to protrude beyond the upper edge of the lower door when in the upper position, and is characterized in that it retracts below the upper edge when the lower lever handle is rotated upward.

[0065] (Note 3) The upper and lower split doors described in Appendix 1 or 2, The aforementioned lower connecting member is equipped with an elastic member and is provided to bias it upward, and the upper and lower split door is characterized in that it returns from the lower position to the upper position due to the biasing force of the elastic member.

[0066] (Note 4) The upper and lower split doors described in appendices 1 to 3, The upper connecting member comprises a display portion provided so as to face the visible surface of the upper door, and a cover portion that covers the display portion. The upper and lower divided door is characterized in that the cover portion is provided so as to be slidable in the vertical direction along the display portion.

[0067] (Note 5) The upper and lower split door described in Appendix 4, The lower connecting member is provided with a support portion extending upward, The cover portion is supported from below by the support portion with the upper connecting member and the lower connecting member connected. The aforementioned cover portion is A split door characterized in that the upper connecting member covers the display section when it is in the upper position, and slides downward to cover the display section as the lower connecting member moves to a lower position.

[0068] (Note 6) The upper and lower split doors described in Appendix 1 to 5, The upper connecting member is provided through a support rod whose axial direction is vertical, and is provided so as to be movable in the vertical direction by sliding on the support rod, characterized in that it is an upper and lower split door.

[0069] (Note 7) The upper and lower split doors described in appendices 1 to 6, The upper and lower split door is characterized in that the lower connecting member is provided through a support rod whose axial direction is vertical, and is provided so as to be movable in the vertical direction by sliding on the support rod. [Explanation of Symbols]

[0070] 1. Upper and lower split door 20 Upper door 21 Upper lever handle 211 Rotary shaft 22 Upper connecting member 23 Main body 24 recesses 25 Display section 26 Lifting member 27 Cover section 30 Lower door 31 Lower lever handle 311 Rotary shaft 32 Lower connecting member 33 Main body 34 Convex part 35 Support part 36 Lowering member 37. Spring members (elastic members) 40 storage spaces 41, 42 Support rod

Claims

1. A split door having an upper door and a lower door positioned below the upper door, The upper door is provided with a rotatable upper lever handle, an upper connecting member that integrally connects the upper door and the lower door, and a lifting member connected to the upper lever handle and the upper connecting member that can lift the upper connecting member upward. The lower door is provided with a rotatable lower lever handle, a lower connecting member that integrally connects the lower door and the upper door, and a lowering member connected to the lower lever handle and the lower connecting member, which is capable of pulling the lower connecting member downward. The upper connecting member located in the lower position and the lower connecting member located in the upper position are fitted together and joined to each other. The lifting member moves the upper connecting member from a lower position to an upper position in conjunction with the upward rotation of the upper lever handle, thereby disengaging the connection with the lower connecting member and allowing the upper door to be opened and closed. The aforementioned pull-down member moves the lower connecting member from an upper position to a lower position in conjunction with the upward rotation of the lower lever handle, thereby disengaging the connection with the upper connecting member and allowing the lower door to be opened and closed freely.

2. In the upper and lower split door according to claim 1, The upper connecting member has a recess that opens downward, The lower connecting member has a protrusion that is projected upward and fits into the recess, The protrusion of the lower connecting member is provided to protrude beyond the upper edge of the lower door when in the upper position, and is characterized in that it retracts below the upper edge when the lower lever handle is rotated upward.

3. In the upper and lower split door according to claim 1, The aforementioned lower connecting member is equipped with an elastic member and is provided to bias it upward, and the upper and lower split door is characterized in that it returns from the lower position to the upper position due to the biasing force of the elastic member.

4. In the upper and lower split door according to claim 1, The upper connecting member comprises a display portion provided so as to face the visible surface of the upper door, and a cover portion that covers the display portion. The upper and lower divided door is characterized in that the cover portion is provided so as to be slidable in the vertical direction along the display portion.

5. In the upper and lower split door according to claim 4, The lower connecting member is provided with a support portion extending upward, The cover portion is supported from below by the support portion with the upper connecting member and the lower connecting member connected. The aforementioned cover portion is A split door characterized in that the upper connecting member covers the display section when it is in the upper position, and slides downward to cover the display section as the lower connecting member moves to a lower position.

6. In the upper and lower split door according to claim 1, The upper connecting member is provided through a support rod whose axial direction is vertical, and is provided so as to be movable in the vertical direction by sliding on the support rod, characterized in that it is an upper and lower split door.

7. In the upper and lower split door according to claim 1, The upper and lower split door is characterized in that the lower connecting member is provided through a support rod whose axial direction is vertical, and is provided so as to be movable in the vertical direction by sliding on the support rod.

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