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 has an upper door 20 and a lower door 30. The upper connecting member 22 of the upper door 20 and the lower connecting member 32 of the lower door 30 are provided with rotation transmission members 401 and 402 that transmit the rotation of one of the upper lever handles or the lower lever handle to the other. When the upper connecting member 22 and the lower connecting member 32 are connected, the rotation of the upper lever handle or the lower lever handle can be transmitted via the rotation transmission members, and the upper door 20 and the lower door 30 can be opened and closed as a single unit by rotating either the upper lever handle or the lower lever handle.

Description

Technical Field

[0004] , , , , , , ,

[0005] , , , ,

[0001] The present disclosure relates to an up-and-down divided 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. It closes the entire opening by a closing operation to partition living rooms and enables passage by opening the entire opening by an opening operation. 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, a baby door, etc. In addition, 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 not being able to promote the circulation of the indoor air environment in spring and autumn when the air conditioner is not in use.

[0003] On the other hand, a hinged door having 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 while disconnecting the connection and maintaining the closed state of the lower door portion to prevent the passage of infants, it is disclosed that the state of the infants can be visually recognized through the opened upper door portion.

Prior Art Documents

Patent Documents

[0004] <00​​​​​​​​​​​​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 divided 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 and an upper connecting member that integrally connects the upper door and the lower door, the lower door is provided with a rotatable lower lever handle and a lower connecting member that is coupled to the upper connecting member and integrally connects the lower door and the upper door, the upper connecting member and the lower connecting member are provided with a rotation transmission member that transmits the rotation of one of the upper lever handles or the lower lever handle to the other, and when the upper connecting member and the lower connecting member are coupled, the rotation of the upper lever handle or the lower lever handle can be transmitted via the rotation transmission member, and the upper door and the lower door can be opened and closed integrally by rotating either the upper lever handle or the lower lever handle.

[0008] Furthermore, in the upper and lower split door, the lower connecting member is provided to be movable at least in the vertical direction, and moves upward to connect with the upper connecting member and moves downward to disconnect, and the rotational transmission member includes an upper transmission member provided on the upper connecting member and a lower transmission member provided on the lower connecting member, and the upper connecting member and the lower connecting member are connected so that the upper transmission member and the lower transmission member are rotatably connected.

[0009] Furthermore, in the upper and lower split door, it is preferable that the upper transmission member comprises a first gear that rotates in conjunction with the rotation of the upper lever handle and a connecting gear that meshes with the first gear, and the lower transmission member comprises a second gear that rotates in conjunction with the rotation of the lower lever handle, the second gear being provided so as to be able to mesh with the connecting gear, and that the movement of the lower connecting member causes the second gear and the connecting gear to mesh, thereby enabling rotational transmission between the upper transmission member and the lower transmission member.

[0010] Furthermore, in the upper and lower split door, the lower connecting member further comprises a driven pulley provided on the pivot shaft of the second gear, a drive pulley provided on the pivot shaft of the lower lever handle, and a toothed belt wrapped around the driven pulley and the drive pulley. The toothed belt is provided such that tension is applied to it when the lower connecting member moves upward, causing it to be taut, and it becomes loose when it moves downward. Preferably, the second gear and the connecting gear mesh when the toothed belt is taut.

[0011] Furthermore, in the upper and lower split door, the first gear, the second gear, and the connecting gear are each tapered gears that rotate around a pivot axis, and the connecting gear and the second gear are arranged so that in the meshing region, the tooth trace directions of the teeth are inclined in the same direction with respect to the pivot axis, the lower connecting member is provided to be movable in the vertical direction and in the axial direction of the pivot axis, and is coupled to the upper connecting member by upward movement and axial movement, and the second gear may be provided to mesh with the connecting gear by the axial movement.

[0012] Furthermore, in the upper and lower split door, it is preferable that the lower connecting member has a pin that protrudes upward from the lower door when it moves upward and connects to the upper connecting member, the upper connecting member has a pin hole that opens downward and into which the pin is inserted, and the pin and the pin hole are provided with locking means to maintain a connected state with each other.

[0013] Furthermore, in the upper and lower split door, it is preferable that the lower door is provided with an operating unit for moving the lower connecting member, and that the operating unit has a display unit for indicating the connected or disconnected state of the upper door and the lower door. [Effects of the Invention]

[0014] According to this disclosure, in addition to opening and closing the upper and lower doors as a single unit, it is also possible to open and close the upper door only or the lower door only, and the operation can be simplified. [Brief explanation of the drawing]

[0015] [Figure 1] This is a front view showing the upper and lower split door according to Embodiment 1 of this disclosure. [Figure 2] This is a front view showing the upper and lower connecting members located inside the upper and lower split door. [Figure 3] Figure 2 is a side view showing the upper and lower connecting members, which are located inside the upper and lower split door, as seen from the left side of the diagram. [Figure 4]It is a perspective view showing the lower connecting member inside the lower door. [Figure 5] It is a front view showing the joined state of the upper connecting member and the lower connecting member. [Figure 6] It is a side view showing the joined state of the upper connecting member and the lower connecting member as seen from the left side in the figure of FIG. 5. [Figure 7] It is a front view showing the upper connecting member and the lower connecting member provided inside the vertically divided door according to Embodiment 2 of the present disclosure. [Figure 8] It is a side view showing the upper connecting member and the lower connecting member provided inside the vertically divided door as seen from the left side in the figure of FIG. 7. [Figure 9] It is a perspective view showing the lower connecting member inside the lower door. [Figure 10] It is a front view showing the joined state of the upper connecting member and the lower connecting member. [Figure 11] It is a side view showing the joined state of the upper connecting member and the lower connecting member as seen from the left side in the figure of FIG. 10.

Mode for Carrying Out the Invention

[0016] The vertically divided door according to the embodiment of the present disclosure will be described while referring to the drawings. In the following description, common components common to Embodiments 1 and 2 are denoted by common reference numerals, and duplicate descriptions are omitted.

[0017] (Embodiment 1) Figures 1 to 6 show the vertically divided door 1 according to Embodiment 1 of the present disclosure. FIG. 1 is a front view showing an example of the vertically divided door 1. FIGS. 2 and 3 show the upper connecting member 22 and the lower connecting member 32 provided inside the vertically divided door 1. FIG. 2 is a front view, and FIG. 3 is a side view shown when viewed from the left side in the figure of FIG. 2. FIG. 4 is a perspective view showing the lower connecting member 32. FIGS. 5 and 6 show the joined state of the upper connecting member 22 and the lower connecting member 32. FIG. 5 is a front view, and FIG. 6 is a side view shown when viewed from the left side in the figure of FIG. 5. In FIG. 1, the state of the vertically divided door 1 as viewed from the inside of a living room or the like is shown. In the figure, the X direction is the width direction (horizontal direction), the Y direction is the front-rear direction (front side Y1, rear side Y2), and the Z direction is the vertical direction.

[0018] As shown in FIG. 1, the vertically divided door 1 includes an upper door 20 and a lower door 30 disposed below the upper door 20. The upper door 20 and the lower door 30 are attached to the vertical frame 12 of the opening frame provided in the opening 11 so as to be openable and closable via hinges or the like not shown. The axis cores of the respective hinges extend in the vertical direction Z, and the positions of the respective axis cores coincide. The opening 11 is provided, for example, between a living room and a corridor connected to the living room.

[0019] The upper door 20 and the lower door 30 each include a flat door panel, a latch device (not shown) housed in the door panel, and lever handles 21 and 31 connected to the latch device. The upper door 20 is provided with an upper lever handle 21 that can be rotated. The lower door 30 is provided with a lower lever handle 31 that can be rotated. The upper lever handle 21 and the lower lever handle 31 are both provided at positions close to the door tip side. The upper door 20 can be opened and closed independently of the lower door 30 by rotating the upper lever handle 21. Similarly, the lower door 30 is configured to be openable and closable independently of the upper door 20 by rotating the lower lever handle 31.

[0020] Furthermore, the upper and lower split door 1 is designed so that the upper door 20 and the lower door 30 can be opened and closed as a single unit by connecting them. In this case, the mechanism described below allows the upper door 20 and the lower door 30 to be opened and closed as a single unit by operating either the upper lever handle 21 or the lower lever handle 31.

[0021] As shown in Figures 2 and 3, an upper connecting member 22 is provided inside the upper door 20 to integrally connect the upper door 20 and the lower door 30, and a lower connecting member 32 is provided inside the lower door 30 to connect the lower door 30 and the upper door 20 integrally by being connected to the upper connecting member 22. The upper connecting member 22 and the lower connecting member 32 are arranged inside the door panel at positions corresponding to each lever handle.

[0022] The upper connecting member 22 comprises a main body portion 23 and an upper transmission member 401 supported by the main body portion 23. A pin hole 24 is formed on the lower surface of the main body portion 23. The pin hole 24 is a substantially cylindrical hole that opens downward toward the main body portion 23 and opens onto the lower edge surface 201 of the upper door 20.

[0023] The lower connecting member 32 comprises a main body portion 33 and a lower transmission member 402 supported by the main body portion 33. A pin 34 protruding upward is erected on the upper surface of the main body portion 33. The pin 34 is formed in a substantially cylindrical shape corresponding to the pin hole 24. The lower connecting member 32 is installed inside the lower door 30 so as to be movable in the vertical direction Z. The lower connecting member 32 shown in Figures 2 and 3 is in a lower position and is in a position where it can move upward.

[0024] As shown in Figure 4, the lower connecting member 32 has a main body portion 33 that is, for example, a block or box shape that is roughly L-shaped when viewed from above. Similarly, the upper connecting member 22 also has a main body portion 23 that is roughly L-shaped when viewed from above.

[0025] In the lower connecting member 32, the front portion 33a of the main body 33 is positioned facing the front side of the lower door 30 and is provided parallel to the plane on which the lower lever handle 31 rotates. The side portion 33b of the main body 33 is positioned facing the door edge side of the lower door 30 and is provided parallel to the axial direction (in this case, the front-rear direction Y) of the pivot axis 311 of the lower lever handle 31. In addition, a similar lever handle is provided in a pair on the opposite side of the pivot axis 311 of the lower lever handle 31, allowing operation from the rear side (Y2 side) of the lower door 30 as well.

[0026] The main body 33 is equipped with an operating section 60 for moving the lower connecting member 32 in the vertical direction Z. The operating section 60 is an operating knob integrally provided with the lower connecting member 32 and is provided so as to protrude from the front portion 33a toward the front Y1.

[0027] As shown in Figure 2, the operating unit 60 is provided so as to be movable in the vertical direction Z along a slide hole 61 formed on the front surface of the lower door 30. The slide hole 61 is, for example, an elongated hole opening in the door panel of the lower door 30, and is formed to be long in the vertical direction Z with a length corresponding to the vertical movement of the lower connecting member 32.

[0028] By moving the operating section 60 above the slide hole 61, the lower connecting member 32, which is integrated with the operating section 60, can be moved upward. As the lower connecting member 32 moves upward, the pin 34 protrudes upward from the upper edge surface 301 of the lower door 30. As shown in Figures 5 and 6, the pin 34 of the lower connecting member 32 is inserted into the pin hole 24 of the upper connecting member 22, and the lower connecting member 32 is connected to the upper connecting member 22. As a result, the upper door 20 and the lower door 30 are connected as a single unit, and the unit is in a connected state.

[0029] For example, it is preferable that the pin 34 is formed from a magnetic material, while a magnet 241 is provided at the top of the pin hole 24 as a means of locking it with the pin 34. As a result, when the pin 34 is inserted into the pin hole 24, it is attracted to each other by the magnetic force of the magnet 241, and the coupled state is maintained.

[0030] Furthermore, moving the operating unit 60 downward causes the lower connecting member 32 to move downward. As shown in Figures 2 and 3, the pin 34 of the lower connecting member 32 detaches from the pin hole 24 of the upper connecting member 22, and the connection between the upper connecting member 22 and the lower connecting member 32 is released. The upper door 20 and the lower door 30 become unconnected.

[0031] As shown in Figure 5, the operating unit 60 is provided with a display unit 62 for indicating the connected or disconnected state of the upper door 20 and the lower door 30. For example, the display unit 62 can be provided as a slider located in the slide hole 61 and linked to the operating unit 60. When the operating unit 60 is operated upward to move the lower connecting member 32 upward, and the lower connecting member 32 and the upper connecting member 22 are connected via the pin 34, the display unit 62 will display, for example, "Connected". On the other hand, when the upper door 20 and the lower door 30 are disconnected, the words "Connected" will not be displayed, as shown in Figure 2. By checking whether or not the display unit 62 shows "Connected", it is possible to visually confirm whether or not the upper door 20 and the lower door 30 are connected.

[0032] In the upper and lower split door 1, when the lower connecting member 32 of the lower door 30 moves upward and connects with the upper connecting member 22 of the upper door 20, the rotation of the upper lever handle 21 or the lower lever handle 31 can be transmitted to each other via the rotation transmission member described below. As a result, the upper door 20 and the lower door 30 can be opened and closed as a single unit by rotating either the upper lever handle 21 or the lower lever handle 31.

[0033] (Rotational transmission member) The upper connecting member 22 and the lower connecting member 32 are provided with rotational transmission members that transmit the rotation of one of the upper lever handles 21 or the lower lever handle 31 to the other. In the exemplary embodiment, the upper connecting member 22 is provided with an upper transmission member 401, and the lower connecting member 32 is provided with a lower transmission member 402.

[0034] More specifically, as shown in Figures 2 and 3, the upper transmission member 401 includes a first gear 41 mounted on the pivot shaft 411, and a connecting gear 43 that meshes with the first gear 41. The first gear 41 is configured to rotate in conjunction with the rotation of the upper lever handle 21.

[0035] The lower transmission member 402 is equipped with a second gear 42 on the pivot shaft 421. The second gear 42 of the lower transmission member 402 is configured to mesh with the connecting gear 43 of the upper transmission member 401. Note that the gears shown in the figure are schematic representations, and detailed descriptions of the tooth shapes that mesh with each other have been omitted.

[0036] As shown in Figure 4, the second gear 42 is provided on the upper part of the side portion 33b of the lower connecting member 32, and the pivot shaft 421 is provided parallel to the axial direction (front-rear direction Y) of the pivot shaft 311 of the lower lever handle 31. Furthermore, the lower transmission member 402 includes a driven pulley 46 provided on the pivot shaft 421 of the second gear 42, a drive pulley 47 provided on the pivot shaft 311 of the lower lever handle 31, and an endless toothed belt 48 wrapped around the driven pulley 46 and the drive pulley 47. Both the driven pulley 46 and the drive pulley 47 are toothed pulleys that mesh with the toothed belt 48 and rotate.

[0037] As described above, the lower connecting member 32 is provided to be movable between the lower position shown in Figures 2 and 3 and the upper position shown in Figures 5 and 6. When the lower connecting member 32 is in the lower position, the toothed belt 48 is loose. On the other hand, when the lower connecting member 32 moves upward, the driven pulley 46 moves upward relative to the drive pulley 47, and the distance between the drive pulley 47 and the driven pulley 46 increases. As a result, tension is applied to the toothed belt 48, and it becomes taut. The toothed belt 48 is provided to be taut when the lower connecting member 32 is in the upper position.

[0038] When the toothed belt 48 is taut, the rotation of the lower lever handle 31 can be transmitted to the second gear 42. That is, by rotating the lower lever handle 31, the pivot shaft 311 rotates, and the drive-side pulley 47 rotates together with the pivot shaft 311. When the drive-side pulley 47 rotates, the toothed belt 48 that meshes with it rotates. The driven-side pulley 46 is located on a pivot shaft 421 which is arranged parallel to the pivot shaft 311, and rotation is transmitted to it via the toothed belt 48. The driven-side pulley 46 rotates together with the pivot shaft 421, and the second gear 42 also rotates together with it. Therefore, the second gear 42 rotates in conjunction with the rotation of the lower lever handle 31.

[0039] When the lower connecting member 32 is in this upper position, it is connected to the upper connecting member 22, as shown in Figures 5 and 6. The second gear 42 of the lower transmission member 402 is meshed with the connecting gear 43 of the upper transmission member 401. The rotation of the second gear 42, which is linked to the rotation of the lower lever handle 31, is transmitted to the first gear 41 via the connecting gear 43.

[0040] As the upper transmission member 401, a driven pulley 44 is provided on the pivot shaft 411 of the first gear 41, and a drive pulley is provided on the pivot shaft (not shown) of the upper lever handle 21, and a toothed belt 45 is wrapped around these driven pulley 44 and drive pulley. Since the upper connecting member 22 is provided so as not to move in the vertical direction Z, the toothed belt 45 of the upper transmission member 401 is always provided in a taut state.

[0041] In the upper transmission member 401, the rotation of the first gear 41 is further transmitted as the rotation of the upper lever handle 21 via the driven pulley 44 and toothed belt 45, etc. Therefore, when the lower lever handle 31 is rotated, the rotation is transmitted via the lower transmission member 402 and the upper transmission member 401, causing the upper lever handle 21 to rotate in conjunction. The lower door 30 opens by moving its latch bolt in conjunction with the lower lever handle 31, and the upper door 20 opens by moving its latch bolt in conjunction with the upper lever handle 21.

[0042] Furthermore, when the lower connecting member 32 is in the upper position and connected to the upper connecting member 22, that is, when the upper door 20 and the lower door 30 are connected, when the upper lever handle 21 is rotated, the rotation is transmitted to the driven pulley 44 via the toothed belt 45, and the first gear 41 rotates together with the pivot shaft 411. The rotation of the first gear 41 is transmitted to the second gear 42 via the connecting gear 43. As the second gear 42 rotates, the lower lever handle 31 rotates in conjunction with it.

[0043] Thus, in the upper and lower split door 1, the connection between the upper connecting member 22 in the upper door 20 and the lower connecting member 32 in the lower door 30 can be easily performed by simply operating the operating unit 60 in the vertical Z direction, and the connected / disconnected state of the upper door 20 and the lower door 30 can be easily switched. When the upper connecting member 22 and the lower connecting member 32 are connected, the upper door 20 and the lower door 30 are connected, the second gear 42 meshes with the connecting gear 43, and the upper transmission member 401 and the lower transmission member 402 are provided to be rotatably transmitted. The rotation of the upper lever handle 21 or the lower lever handle 31 can be transmitted to each other. Then, by rotating either the upper lever handle 21 or the lower lever handle 31, the upper door 20 and the lower door 30 can be opened and closed as a single unit.

[0044] When the upper door 20 and the lower door 30 are connected, the upper lever handle 21 can be used to open and close the door, or the lower lever handle 31 can be used to open and close the door. The lever handle can be selected to be at a height that is easy to use according to the user's height, making it easier for the elderly and children to open the door and improving operability.

[0045] Furthermore, the toothed belt 48 is taut when tension is applied by the upward movement of the lower connecting member 32, while it is designed to be loose in the lower position shown in Figures 2 and 3. That is, when the upper door 20 and the lower door 30 are not connected, the toothed belt 48 of the lower transmission member 402 is loose, and the rotational operation of the lower lever handle 31 is not transmitted. Therefore, in the unconnected state, the upper door 20 and the lower door 30 can be opened and closed individually, making it possible to open only the upper door 20 to block the passage of pets or infants, or to open only the lower door 30 to block the line of sight while ensuring ventilation.

[0046] Furthermore, since the upper connecting member 22 of the upper door 20 is provided so as to be immovable in the vertical direction Z, the configuration is not limited to the driven pulley 44 and the drive pulley with a toothed belt 45 wrapped around them as described above. The pivot shaft (not shown) of the upper lever handle 21 may be directly connected to the pivot shaft 411 of the first gear 41, so that the toothed belt 45 or the like is not interposed.

[0047] (Embodiment 2) Figures 7 to 11 show the upper and lower split door 1 according to Embodiment 2. Figures 7 and 8 show the upper connecting member 22 and the lower connecting member 32 provided inside the upper and lower split door 1, with Figure 7 being a front view and Figure 8 being a side view shown from the left side in Figure 7. Figure 9 is a perspective view showing the lower connecting member 32. Figures 10 and 11 show the connected state of the upper connecting member 22 and the lower connecting member 32, with Figure 10 being a front view and Figure 11 being a side view shown from the left side in Figure 10.

[0048] In the previously described embodiment 1, the main body portion 23 of the upper connecting member 22 and the main body portion 33 of the lower connecting member 32 were configured to be approximately L-shaped when viewed from above. However, the upper and lower split door 1 of this disclosure is not limited to this configuration. For example, as shown in Figures 7 and 8, the upper connecting member 22 may be provided in a long block or box shape along the width direction X of the upper door 20, and the lower connecting member 32 may similarly be provided in a long block or box shape along the width direction X of the lower door 30.

[0049] In this case, it is preferable that the upper transmission member 401 and the lower transmission member 402, which serve as rotational transmission members, have their pivot shafts 511 of the first gear 51, 521 of the second gear 52, and 531 of the connecting gear 53 arranged parallel to the width direction X. The first gear 51, the second gear 52, and the connecting gear 53 are tapered gears that rotate around the pivot shafts 511, 521, and 531, respectively.

[0050] In the diagram, the tooth shapes of each gear are not shown in detail, but the teeth of the first gear 51 and the teeth of the connecting gear 53 are configured such that the direction of the tooth traces in the meshing region of each gear are tapered and inclined in the same direction with respect to the axial direction of the pivot shaft 511. In other words, the first gear 51 is configured as a tapered gear in which the reference pitch of the teeth increases in the direction along the pivot shaft 511 as it approaches the door edge side of the upper door 20 (left side in Figure 7). The connecting gear 53 is configured as a tapered gear in which the reference pitch of the teeth increases in the direction along the pivot shaft 531 as it moves away from the door edge side.

[0051] In the lower transmission member 402, the teeth of the second gear 52 are arranged such that, in the meshing region with the teeth of the connecting gear 53, the direction of each tooth trace is inclined in the same direction relative to the axial direction of the pivot shaft 521 (or pivot shaft 531). The second gear 52 is configured as a tapered gear in which the reference pitch of the teeth increases in diameter as it approaches the door edge side of the lower door 30 in the direction along the pivot shaft 521.

[0052] Since the first gear 51, the second gear 52, and the connecting gear 53 are made of tapered gears, the second gear 52 can be brought relatively close to the connecting gear 53 along the axial direction of the pivot axes 521 and 531, thereby enabling the connecting gear 53 and the second gear 52 to mesh. Therefore, the second gear 52 is provided to mesh with the connecting gear 53 by upward movement and movement in the axial direction X (in this case, movement from the X1 side to the X2 side as shown in Figure 7).

[0053] The lower connecting member 32 is provided to be movable in the vertical direction Z and in the width direction X, which is the axial direction of the pivot axis 521. The lower connecting member 32 is connected to the upper connecting member 22 as shown in Figure 10 by moving it upward from the lower position shown in Figure 7 and moving it axially from the X1 side to the X2 side in the width direction X.

[0054] Furthermore, as shown in Figures 7 and 8, a pin 35 protruding upward is erected on the upper surface of the main body portion 33 of the lower connecting member 32. The pin 35 is formed in a substantially L-shape or hook shape with its upper end bent in the X2 direction and having a locking portion 351.

[0055] In contrast, a pin hole 25 is formed on the lower surface of the main body portion 23 of the upper connecting member 22. The pin hole 25 is open toward the bottom of the main body portion 23. Furthermore, the pin hole 25 is bent in the X2 direction in correspondence with the pin 35 and is formed as a hole with a substantially L-shaped or hook-shaped cross-section having a stepped portion 251.

[0056] The sliding hole 63 of the operating section 60 is elongated in the vertical direction Z and is provided in a roughly L-shape with its upper end extending in the width direction X (X2 direction). As shown in Figure 7, the operating section 60 can be moved upward along the sliding hole 63 formed in the lower door 30 and further moved toward the X2 side. By operating the operating section 60 along the sliding hole 63, the lower connecting member 32, which is integrated with the operating section 60, moves upward and toward the X2 side.

[0057] As shown in Figures 10 and 11, the pin 35 of the lower connecting member 32 is inserted into the pin hole 25 of the upper connecting member 22, and the lower connecting member 32 is connected to the upper connecting member 22. The locking portion 351 of the pin 35 and the stepped portion 251 of the pin hole 25 correspond to locking means, and the locking portion 351 of the pin 35 is locked into the stepped portion 251 of the pin hole 25, maintaining the connected state. The upper door 20 and the lower door 30 are connected as a single unit. The display unit 64 displays "Connecting".

[0058] In the upper and lower split door 1 according to this embodiment, the upper transmission member 401 includes a drive-side pulley, a driven-side pulley 44, and a toothed belt 45 as rotational transmission members, while the lower transmission member 402 includes a driven-side pulley 56, a drive-side pulley 57, and a toothed belt 58. The toothed belt 58 is, for example, an endless belt made of stretchable rubber, silicone, or resin.

[0059] As shown in Figure 9, the second gear 52 is mounted on the upper part of the lower connecting member 32 on a pivot shaft 521 whose axial direction is in the width direction X. In this case, the pivot shaft 521 of the second gear 52 is mounted in a direction perpendicular to the axial direction (front-rear direction Y) of the pivot shaft 311 of the lower lever handle 31. The drive-side pulley 57 and the driven-side pulley 56 of the lower transmission member 402 are mounted in directions whose axial directions are perpendicular to each other, and the toothed belt 58 is mounted in an arrangement that includes a 90-degree twist.

[0060] As described above, the lower connecting member 32 is provided to be movable between the lower position shown in Figures 7 and 8 and the upper position shown in Figures 10 and 11. When the lower connecting member 32 is in the lower position, the toothed belt 58 is loose. On the other hand, when the lower connecting member 32 moves upward, the driven pulley 56 moves upward relative to the drive pulley 57, and tension is applied to the toothed belt 58, making it taut. The toothed belt 58 is designed to follow the upward movement and X-direction movement of the second gear 52 while maintaining its tension.

[0061] When the toothed belt 58 is taut, the rotation of the lower lever handle 31 can be transmitted to the second gear 52. That is, when the lower lever handle 31 is rotated, the pivot shaft 311 rotates, the drive-side pulley 57 rotates together with the pivot shaft 311, and the driven-side pulley 56 rotates via the toothed belt 58 along with the rotation of the drive-side pulley 57. The second gear 52 rotates in conjunction with the rotation of the lower lever handle 31. The rotation of the second gear 52 is transmitted to the first gear 51 via the connecting gear 53 that meshes with it, and then to the upper lever handle 21.

[0062] Therefore, in the upper and lower split door 1 according to this embodiment, when the upper connecting member 22 and the lower connecting member 32 are connected, the upper door 20 and the lower door 30 are connected, the second gear 52 meshes with the connecting gear 53, and the upper transmission member 401 and the lower transmission member 402 are provided to be rotatably transmitted. The rotation of either the upper lever handle 21 or the lower lever handle 31 can be transmitted to the other. Then, by rotating either the upper lever handle 21 or the lower lever handle 31, the upper door 20 and the lower door 30 can be opened and closed as a single unit. Moreover, since the first gear 51, the second gear 52, and the connecting gear 53 are tapered gears, the meshing of the teeth can be made smoother, and rotational transmission can be made reliable.

[0063] In addition, in the upper and lower split door 1 according to this disclosure, the lower transmission member 402 is not limited to a configuration in which the rotation axes of the drive-side pulley 57 and the driven-side pulley 56 are orthogonal to each other and the toothed belt 58 is arranged in a 90-degree twisted configuration. It may also be configured in which an appropriate bevel gear is interposed between the drive-side pulley 57 and the rotation axis 311 of the lower lever handle 31.

[0064] Furthermore, while the above-described embodiment illustrates a configuration in which the lower connecting member 32 moves upward and connects to the upper connecting member 22, the upper and lower split door 1 according to this disclosure is not limited to this configuration. For example, the upper connecting member 22 may move downward (and in the width direction) to connect to the lower connecting member 32.

[0065] 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.

[0066] Furthermore, the embodiments and other matters disclosed herein can be understood as the technical concepts described in the following appendix.

[0067] (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 and an upper connecting member that integrally connects the upper door and the lower door. The lower door is provided with a rotatable lower lever handle and a lower connecting member that is connected to the upper connecting member to integrally connect the lower door and the upper door. The upper connecting member and the lower connecting member are provided with a rotation transmission member that transmits the rotation of one of the upper lever handles or the lower lever handles to the other. A split door characterized in that, when the upper connecting member and the lower connecting member are connected, the rotation of the upper lever handle or the lower lever handle can be transmitted via the rotation transmission member, and the upper door and the lower door can be opened and closed as a single unit by rotating either the upper lever handle or the lower lever handle.

[0068] (Note 2) In the upper and lower split door described in Appendix 1, The lower connecting member is provided to be movable at least in the vertical direction, and moves upward to connect with the upper connecting member and moves downward to disconnect. The rotational transmission member includes an upper transmission member provided on the upper connecting member and a lower transmission member provided on the lower connecting member. A vertically split door characterized in that the upper connecting member and the lower connecting member are connected so that the upper transmission member and the lower transmission member can be rotatably transmitted.

[0069] (Note 3) In the upper and lower split doors described in Appendix 2, The upper transmission member comprises a first gear that rotates in conjunction with the rotation of the upper lever handle, and a connecting gear that meshes with the first gear. The lower transmission member is equipped with a second gear that rotates in conjunction with the rotation of the lower lever handle, and the second gear is provided so as to be able to mesh with the connecting gear. A split door characterized in that the movement of the lower connecting member causes the second gear and the connecting gear to mesh, enabling the upper transmission member and the lower transmission member to rotate and transmit power.

[0070] (Note 4) In the upper and lower split door described in Appendix 3, The lower connecting member further comprises a driven pulley provided on the pivot shaft of the second gear, a drive pulley provided on the pivot shaft of the lower lever handle, and a toothed belt wrapped around the driven pulley and the drive pulley. The toothed belt is provided such that tension is applied when the lower connecting member moves upward, resulting in a taut state, and when it moves downward, it becomes loose. An upper and lower split door characterized in that the second gear and the connecting gear mesh when the toothed belt is under tension.

[0071] (Note 5) In the case of the upper and lower split doors described in Appendix 3 or Appendix 4, The first gear, the second gear, and the connecting gear are each tapered gears that rotate around a pivot axis, and the connecting gear and the second gear are arranged such that in the meshing region, the tooth trace directions of the teeth are inclined in the same direction with respect to the pivot axis. The lower connecting member is provided to be movable in the vertical direction and in the axial direction of the pivot axis, and is connected to the upper connecting member by moving upward and in the axial direction. The upper and lower split door is characterized in that the second gear is provided to mesh with the connecting gear when the door moves in the axial direction.

[0072] (Note 6) In the case of the upper and lower split door described in any of Appendix 2 to Appendix 5, The lower connecting member has a pin that protrudes upward from the lower door when it moves upward and connects to the upper connecting member. The upper connecting member has a pin hole that opens downwards into which the pin is inserted. A split door, upper and lower, characterized by having locking means that maintain a connected state between the pin and the pin hole.

[0073] (Note 7) In the case of the upper and lower split door described in any of Appendix 2 to Appendix 6, The lower door is provided with an operating section for moving the lower connecting member. The aforementioned operating unit is characterized by having a display unit that shows the connected or disconnected state of the upper door and the lower door. [Explanation of Symbols]

[0074] 1. Upper and lower split door 20 Upper door 21 Upper lever handle 22 Upper connecting member 23 Main body 24, 25 pin holes 241 Magnet (locking means) 251 Stepped portion (locking means) 30 Lower door 31 Lower lever handle 32 Lower connecting member 33 Main body 34, 35 pins 351 Locking part (locking means) 401 Upper transmission member (rotational transmission member) 41, 51 First Gear 43, 53 Linking gears 402 Lower transmission member (rotational transmission member) 42, 52 Second gear 60 Control section 62, 64 Display section

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 and an upper connecting member that integrally connects the upper door and the lower door. The lower door is provided with a rotatable lower lever handle and a lower connecting member that is connected to the upper connecting member to integrally connect the lower door and the upper door. The upper connecting member and the lower connecting member are provided with a rotation transmission member that transmits the rotation of one of the upper lever handles or the lower lever handles to the other. A split door characterized in that, when the upper connecting member and the lower connecting member are connected, the rotation of the upper lever handle or the lower lever handle can be transmitted via the rotation transmission member, and the upper door and the lower door can be opened and closed as a single unit by rotating either the upper lever handle or the lower lever handle.

2. In the upper and lower split door according to claim 1, The lower connecting member is provided to be movable at least in the vertical direction, and moves upward to connect with the upper connecting member and moves downward to disconnect. The rotational transmission member includes an upper transmission member provided on the upper connecting member and a lower transmission member provided on the lower connecting member. A vertically split door characterized in that the upper connecting member and the lower connecting member are connected so that the upper transmission member and the lower transmission member can be rotatably transmitted.

3. In the upper and lower split door described in claim 2, The upper transmission member comprises a first gear that rotates in conjunction with the rotation of the upper lever handle, and a connecting gear that meshes with the first gear. The lower transmission member is equipped with a second gear that rotates in conjunction with the rotation of the lower lever handle, and the second gear is provided so as to be able to mesh with the connecting gear. A split door characterized in that the movement of the lower connecting member causes the second gear and the connecting gear to mesh, enabling rotational transmission between the upper transmission member and the lower transmission member.

4. In the upper and lower split door according to claim 3, The lower connecting member further comprises a driven pulley provided on the pivot shaft of the second gear, a drive pulley provided on the pivot shaft of the lower lever handle, and a toothed belt wrapped around the driven pulley and the drive pulley. The toothed belt is provided such that tension is applied when the lower connecting member moves upward, resulting in a taut state, and when it moves downward, it becomes loose. An upper and lower split door characterized in that, when the toothed belt is in a taut state, the second gear and the connecting gear are meshed together.

5. In the upper and lower split door according to claim 3, The first gear, the second gear, and the connecting gear are each tapered gears that rotate around a pivot axis, and the connecting gear and the second gear are arranged such that in the meshing region, the tooth trace directions of the teeth are inclined in the same direction with respect to the pivot axis. The lower connecting member is provided to be movable in the vertical direction and in the axial direction of the pivot axis, and is connected to the upper connecting member by moving upward and in the axial direction. The upper and lower split door is characterized in that the second gear is provided to mesh with the connecting gear when the door moves in the axial direction.

6. In the upper and lower split door described in claim 2, The lower connecting member has a pin that protrudes upward from the lower door when it moves upward and connects to the upper connecting member. The upper connecting member has a pin hole that opens downwards into which the pin is inserted. A split door, upper and lower, characterized by having locking means that maintain a connected state between the pin and the pin hole.

7. In the upper and lower split door according to any one of claims 2 to 6, The lower door is provided with an operating section for moving the lower connecting member. The aforementioned operating unit is characterized by having a display unit that shows the connected or disconnected state of the upper door and the lower door.

Images