JP7510043B2 - Door structure - Google Patents

Description

The present invention relates to door structures, and more specifically to technology for supporting doors that move up and down.

Conventionally, there is known a door that allows the opening to be opened and closed by sliding the door body along a wall in which the opening is formed (see, for example, Patent Document 1). Patent Document 1 describes a door that opens and closes the opening by driving a motor to raise and lower the door body suspended by a chain.

Japanese Patent Application Laid-Open No. 10-266700

In a door constructed as described in Patent Document 1, if the door body is suspended by a chain and remains stationary in the upper open position, the weight of the door body will be continuously applied to the chain. This can cause deformation of the chain, which can lead to deterioration of the door over time.

The present invention was made in consideration of the above-mentioned circumstances, and the problem that the present invention aims to solve is to provide a door structure that can suppress the progression of deterioration of the door over time, even if the door body is kept stationary in the upper position.

To solve the above problems, the present invention provides a door structure configured as follows:

(1) A door structure comprising a wall body having an opening formed therein, and a door body provided on one side of the wall body in a vicinity of the opening so as to be capable of rising and falling, the door body rising and falling between an upper first position and a lower second position to open and close the opening, wherein one of the wall body and the door body is formed with a displacement engagement portion capable of being displaced relative to the one, and the other of the wall body and the door body is formed with a fixed engagement portion that cannot be displaced relative to the other, and the displacement engagement portion is fixed when the door body is located at the first position. When the door body is raised to a raised position which is higher than the first position, the door body is displaced to a disengaged position where it does not engage with the fixed engagement portion, and when the door body is raised to a raised position which is higher than the first position, the door body is supported by the wall body in an engaged state where the displacement engagement portion and the fixed engagement portion are engaged , and a damper is provided in the displacement engagement portion, and the damper is configured to set the time required for the displacement engagement portion to return to the engagement position from the disengagement position to be equal to or longer than a predetermined time.

(2) A door structure comprising a wall body having an opening formed therein, and a door body provided on one side of the wall body in a vicinity of the opening so as to be capable of rising and falling, the door body rising and falling between an upper first position and a lower second position to open and close the opening, wherein one of the wall body and the door body is formed with a displacement engagement portion capable of being displaced relative to the one, and the other of the wall body and the door body is formed with a fixed engagement portion not capable of being displaced relative to the other, and when the door body is located at the first position, the displacement engagement portion is located at an engagement position capable of engaging with the fixed engagement portion ... said fixed engaging portion is a pin member fixed to an upper surface of said door body, and when said door body is raised to an elevated position which is higher than said upper position, said fixed engaging portion is displaced to a disengaged position not engaging with said fixed engaging portion, and in an engaged state in which said displacement engaging portion and said fixed engaging portion are engaged with each other, said door body is supported by said wall body, said displacement engaging portion is a hook member provided displaceably with respect to said wall body, and said fixed engaging portion is a pin member fixed to an upper surface of said door body, said hook member is located at an engaged position engageable with said pin member when said door body is located at said first position, and when said door body is raised to said elevated position, said hook member is pressed by said pin member to be displaced to said disengaged position .

(3) The door structure described in (2), wherein the hook member is rotatably displaced relative to the wall body, and the hook member is formed with a hook portion that engages with the pin member when in the engaged position and a pressed portion formed above the hook portion, and when the door body is raised to the raised position, the pressed portion is pressed by the pin member, thereby causing the hook member to be rotated and displaced to the non - engaged position.

(4) The door structure described in (2) or (3), wherein the pin members are provided in two pieces at positions symmetrical about a vertical center line of the door body, the hook members are provided in two pieces at positions corresponding to the pin members, and each of the hook members is displaceable in a direction symmetrical about the center line.

(5) The door structure according to any one of (1) to (4) , wherein the door body is suspended by a rope connected to a drive unit at one end, and the door body can be raised and lowered by driving the drive unit.

(6) The door structure according to (5) , wherein the wall body is provided with a detection unit that detects the presence or absence of tension applied to the rope.

The door structure of the present invention described above has the following advantages:

According to the configuration of (1), even if the door body continues to remain stationary at the first position on the upper side, the door body can be supported by the wall body, so that the progress of deterioration of the door over time can be suppressed. In addition, with a simple configuration, it is possible to ensure the time for the displacement engagement part to displace from the disengagement position to the engagement position.

According to the configuration of (2), even if the door body continues to stay stationary at the upper first position, the door body can be supported by the wall body, so that the progress of deterioration of the door over time can be suppressed. In addition, with a simple configuration, the displacement engagement portion can be displaced from the engagement position to the non-engagement position.

According to the configuration of (3) , by making the hook member rotatably displaceable, the hook member can be smoothly displaced between the engaged position and the disengaged position.

According to the configuration of (4) , the door body can be stably supported by the two hook members.

According to the configuration of (5) , the door body can be smoothly raised and lowered by the rope.

According to the configuration of (6) , by detecting the presence or absence of tension in the rope, it is possible to determine whether or not the door body is being stably supported.

FIG. 2 is a front view showing an open state of the door structure according to the embodiment. 2 is a cross-sectional view taken along line AA in FIG. 1 . 3 is a cross-sectional view taken along line BB in FIG. 2. FIG. 4 is a front view showing the door structure in an open state with the cover member and the closing member removed. FIG. 4 is a front view showing an intermediate state of the door structure with the cover member and the blocking member removed. 6A to 6E are front views showing a procedure for releasing the engagement between the pin member and the hook member. 6A to 6E are front views showing a procedure for engaging the pin member with the hook member. FIG. 4 is a front view showing the detection unit when no tension is applied to the rope. FIG. 4 is a front view showing the detection unit when tension is applied to the rope.

The following describes a lift-up door 10, which is one embodiment of a door structure according to the present invention, with reference to Figures 1 to 9. As shown in Figures 1 to 3, the lift-up door 10 according to this embodiment has as its main components a wall body W, a pair of guide rails 11, a cover member 15, a blocking member 16, and a door body 20. Each component will be described in turn below.

The wall W is erected on the floor G. A rectangular opening Wa is formed at a predetermined height from the floor G at the bottom of the wall W. A pair of guide rails 11 are fixed in the up-down direction on both the left and right sides of the opening Wa on the front side (the surface facing the paper in FIG. 1), which is one surface of the wall W. A door body 20 is provided between the guide rails 11 so as to be slidable in the up-down direction along the pair of guide rails 11.

The front side of the wall body W is covered with a cover member 15, which is a gate-shaped box, except for the area below the front of the opening Wa. In other words, the door body 20, guide rails 11, and the mechanism for raising and lowering the door body 20 when the lift door 10 is in the open position described below are housed inside the cover member 15.

In the lift door 10, the door body 20 is configured to open and close the opening Wa between the wall body W and the cover member 15 by lifting and lowering between a first position, which is an open position (in this embodiment, the upper position shown in Figures 1 and 4), and a second position, which is a closed position (also the lower position shown in Figure 3).

As shown in FIG. 1, the cover member 15 is formed with a rectangular cover opening 15a that is the same shape as the lower front side of the opening Wa of the wall body W. The cover member 15 is also provided with a blocking member 16 that can block the gap between the cover member 15 and the wall body W on the upper side and upper edge of both the left and right sides of the cover opening 15a. The cover member 15 is also provided with cover plates 15b, 15b that block the gap between the cover member 15 and the wall body W on the lower side of both the left and right sides of the cover opening 15a. That is, the upper side and upper edge of both the left and right sides of the cover opening 15a can block the gap between the cover member 15 and the wall body W with the blocking member 16, and the lower side of both the left and right sides has the gap between the cover opening 15a and the wall body W blocked with the cover plates 15b, 15b.

The blocking member 16 can be displaced between a blocking state in which the gap between the cover member 15 and the wall body W is blocked as shown in FIG. 1, and an open state in which the gap is opened as shown in FIG. 2 and FIG. 3. The blocking member 16 is in the blocking state when the door body 20 is in the upper open position, and in the open state when the door body 20 is in the lower closed position. More specifically, the blocking member 16 can be in the blocking state when the door body 20 is in the open position, and the door body 20 can be in the closed position when the blocking member 16 is in the open state.

In this embodiment, as shown in Figures 1 and 2, the blocking member 16 includes a left blocking member 16L and a right blocking member 16R formed as a pair on the left and right sides. The left blocking member 16L is provided rotatably via hinges 19, 19 about an axis along the left side, which is one side of the cover opening 15a. The right blocking member 16R is provided rotatably via hinges 19, 19 about an axis along the right side, which is the other side of the cover opening 15a.

As shown in FIG. 2, a left motor ML is provided on the hinge 19 supporting the left blocking member 16L. The left blocking member 16L can be rotated by driving the left motor ML. Similarly, the right blocking member 16R can be rotated by driving the right motor MR. Note that the hinges 19, 19, the left motor ML, and the right motor MR can also be provided on the outside of the cover member 15 (the opposite side of the wall body W). It is also possible to configure the left blocking member 16L and the right blocking member 16R to be rotated by another driving source, such as manually.

As shown in Figures 1 to 3, the left blocking member 16L is configured with a left blocking plate and an upper blocking plate integrally formed in an L-shape. As shown in Figure 1, the left blocking plate is capable of blocking the gap between the cover member 15 and the wall body W at the upper side of the left end edge of the cover opening 15a. Also, as shown in Figure 1, the upper blocking plate is capable of blocking the gap between the cover member 15 and the wall body W at a portion on the left side of the upper end edge of the cover opening 15a. Similarly, the right blocking member 16R is configured with a right blocking plate and an upper blocking plate integrally formed in an L-shape, and is capable of blocking the gap between the cover member 15 and the wall body W at the upper side of the right end edge of the cover opening 15a and at a portion on the right side of the upper end edge.

In the lift door 10 according to this embodiment, the blocking member 16 configured as described above can be displaced between a blocked state and an open state. Specifically, when the blocking member 16 is in the open state as shown in FIG. 2, the right blocking member 16R rotates clockwise in a plan view by driving the right motor MR, and the right blocking member 16R blocks the gap between the cover member 15 and the wall body W at the right end edge and the top end edge of the cover opening 15a.

Furthermore, the left-side motor ML is driven to rotate the left-side blocking member 16L counterclockwise in a plan view, and the left-side blocking member 16L blocks the gap between the cover member 15 and the wall body W at the left end edge and upper end edge of the cover opening 15a.

As described above, in the lift door 10, the left blocking member 16L and the right blocking member 16R can close the gap between the cover member 15 and the wall body W on three sides of the cover opening 15a, the left and right sides and the top side, using two drive units (left motor ML and right motor MR). In other words, by driving the left blocking member 16L and the right blocking member 16R respectively, it is possible to close the gap between the cover member 15 and the wall body W formed on the three sides of the cover opening 15a.

The door body 20 is a plate-like member that is thick in the front-rear direction and is constructed by combining metal members. The door body 20 is provided between a pair of guide rails 11, 11 erected on both sides of the door body 20, and is provided so as to be able to slide vertically along the guide rails 11, 11. The guide rails 11, 11 are provided vertically on both sides of the opening Wa in the wall body W.

As shown in Figure 3, the guide rails 11, 11 have a groove shape 11a formed on the surfaces facing each other. Guide rollers (open side guide roller 26U and closed side guide roller 26D) extending from the door body 20 are inserted into the inside of this groove shape 11a. As shown in Figure 3, in this embodiment, an inclined member 13 for guiding the guide rollers 26U, 26D is provided on the front surface (the surface farther from the wall body W) of the inner peripheral surface of the groove shape 11a of the guide rail 11.

In this embodiment, as shown in FIG. 4, a resin packing P is provided around the opening Wa in the wall W, which contacts the peripheral edge of the rear surface of the door body 20 when the door body 20 closes the opening Wa. It is also possible to provide the packing P on the peripheral edge of the rear surface of the door body 20, so that the packing P contacts the periphery of the opening Wa in the wall W when the door body 20 closes the opening Wa.

Two guide rollers 26U and 26D are provided extending from the side of the door body 20 outward on the guide rails 11/11 sides (on both the left and right sides) along the up-down direction, which is the sliding direction of the door body 20. In detail, the opening side guide roller 26U is provided on the upper side of the side of the door body 20, which is the side along which the door body 20 slides when opening the opening Wa in the sliding direction of the door body 20. Similarly, the closing side guide roller 26D is provided on the lower side of the side of the door body 20, which is the side along which the door body 20 slides when closing the opening Wa in the sliding direction of the door body 20.

The guide rollers 26U and 26D are rotatable inside the guide rails 11 and 11 (inside the groove shape 11a) around an axis extending toward the guide rails 11 and 11. As a result, when the door body 20 slides along the guide rails 11 and 11, the guide rollers 26U and 26D rotate along the groove shape 11a of the guide rails 11 and 11 (more specifically, the front and rear surfaces of the groove shape 11a). As shown in FIG. 3, the closed side guide roller 26D is formed with a smaller diameter than the open side guide roller 26U.

Fixed inside the door body 20 are a right door pulley 30R and a left door pulley 30L, which are movable pulleys around which a rope r is wound. In addition, a pair of fixed pulleys, a first fixed pulley 31 and a second fixed pulley 32, are fixed above the opening Wa in the wall body W. Both ends of the rope r, sandwiching the left and right door pulleys 30R and 30L, are wound around the first fixed pulley 31 and the second fixed pulley 32, respectively.

As shown in Figures 7 and 8, the rope r is wound around the first fixed pulley P1, which is fixed at one end side (the right side in Figures 4 and 5) of the first fixed pulley 31. One end of the rope r is connected to an electric motor M, which is a first drive unit, fixed to the wall W below the first fixed pulley P1. The rope r is wound around the second fixed pulley P2 at the other end side (also on the left side) of the second fixed pulley 32. The other end of the rope r is connected to a manual handle H, which is a second drive unit, fixed to the wall W below the second fixed pulley P2. The manual handle H is locked so that it does not rotate under normal conditions (when the electric motor M is used as the main drive source).

In the lift door 10 according to this embodiment, the electric motor M, which is the first drive unit, drives the door body 20 to move up and down. Specifically, when the electric motor M pays out the rope r in the direction of the arrow R1 in FIG. 4, the door body 20 descends downward as shown by the arrow D in FIG. 4 due to its own weight. Conversely, when the electric motor M winds up the rope r in the direction of the arrow R2 in FIG. 5, the door body 20 is pulled upward as shown by the arrow U in FIG. 5. In this way, in the lift door 10 according to this embodiment, the electric motor M is driven to lift and lower the door body 20, which allows the door body 20 to open and close the opening Wa formed between the guide rails 11.

In this way, in the lift door 10 according to this embodiment, the door body 20 is suspended by a rope r connected at one end to the electric motor M, which is the drive unit, and the door body 20 can be raised and lowered by driving the electric motor M. This makes it possible to smoothly raise and lower the door body 20 in the lift door 10 using the rope r. Note that the rope r in this embodiment is an example of a transmission mechanism that transmits a driving force from the drive unit to the door body 20, and the form is not limited to the rope r. For example, other configurations such as a chain mechanism or gear mechanism can also be used as the transmission mechanism.

In addition, in the lift door 10, the door body 20 can also be driven to rise and fall by the manual handle H, which is the second drive unit. Specifically, the user unlocks the manual handle H and rotates it. This unwinds the rope r, causing the door body 20 to descend downward under its own weight. Conversely, when the user rotates the manual handle H in the opposite direction, the rope r is wound up and the door body 20 is pulled upward. In this way, in the lift door 10 according to this embodiment, the door body 20 can open and close the opening Wa formed between the guide rails 11, 11 by the user rotating the manual handle H to raise and lower the door body 20.

In the lift door 10 according to this embodiment, when the door body 20 closes the opening Wa, the guide rails 11 guide the guide rollers 26U and 26D to displace the door body 20 rearward toward the wall W. Specifically, as shown in FIG. 3, an inclined member 13 is provided on the front surface (the surface farther from the wall W) of the inner peripheral surface of the groove shape 11a in the guide rail 11.

In the lift door 10 configured as described above, when the door body 20 closes the opening Wa, the inclined members 13 on the guide rails 11 guide the guide rollers 26U and 26D to displace the door body 20 toward the wall W. This causes the peripheral portion of the rear surface of the door body 20 to press against the packing P. In this manner, in this embodiment, the door body 20 and the periphery of the opening Wa can be brought into close contact with each other via the packing P, so that the airtightness or watertightness of the lift door 10 in the closed state can be ensured with a simple configuration.

In addition, the lift door 10 according to this embodiment is configured so that the blocking member 16 blocks the gap between the wall body W and the left and right sides and the top side of the cover opening 15a. This prevents foreign objects from entering the guide rails 11 when the door body 20 is in the open position, and allows the door body 20 to slide smoothly when the blocking member 16 is in the open state and the door body 20 is in the closed position.

In addition, with the lift door 10, the blocking member 16 can prevent foreign objects from getting caught between the door body 20 and the opening Wa of the wall body W. This allows the door body 20 to be properly attached to the packing P, ensuring the sealing performance of the door body 20. In this way, with the lift door 10 according to this embodiment, the sliding displacement of the door body 20 can be smoothly performed by preventing the intrusion of foreign objects into the guide rails 11, 11, and it is possible to prevent a decrease in sealing performance due to foreign objects getting caught between the door body 20 and the opening Wa.

As shown in Figures 4 and 5, in the lift door 10 according to this embodiment, support parts 40, 40 for supporting the door body 20 in the open position are provided between the first fixed pulley 31 and the first fixed pulley P1 on the wall body W, and between the second fixed pulley 32 and the second fixed pulley P2. In this embodiment, the left and right support parts 40, 40 have the same configuration except that they are arranged symmetrically, so only the right support part 40 will be described below, and a detailed description of the left support part 40 will be omitted.

6 and 7, the support portion 40 includes a fixed portion 40a that is fixed to the front surface of the wall body W, a hook member 41 that is rotatably supported by the fixed portion 40a, and a damper 42 that connects the fixed portion 40a and the hook member 41. The damper 42 is configured to resist the clockwise displacement of the hook member 41 (to reduce the clockwise displacement speed of the hook member 41).

The hook member 41 is a plate-like member whose upper end is supported by a pivot shaft 41a so as to be rotatable with respect to the fixed portion 40a. In this embodiment, the hook member 41 is formed as a displacement engagement portion that is displaceable relative to the wall body W. A hook-shaped hook portion 41b is formed at the lower portion of the hook member 41. A pressed portion 41c that is inclined with respect to the vertical direction is formed at the middle portion of the hook member 41 in the vertical direction and above the hook portion 41b. A sloping portion 41d that is inclined with respect to the vertical direction is formed at the lower end of the hook member 41 and below the hook portion 41b. As shown in Figures 6 and 7, the pressed portion 41c and the sloping portion 41d are formed so as to be inclined in the same direction (from the upper left to the lower right).

On the other hand, on the upper surface of the door body 20, as shown in Figures 4 and 5, the supported parts 21, 21 extend upward and are fixed to the locations located below the support parts 40, 40. The supported parts 21 include two support plates 21a standing parallel to each other in the front-rear direction, and a pin member 21b that connects the upper ends of the support plates 21a to each other in the front-rear direction. In this embodiment, the pin member 21b is formed as a fixed engagement part that cannot be displaced relative to the door body 20.

As shown in Fig. 4 and Fig. 6(a), when the door body 20 of the lifting door 10 is in the open position, the hook portion 41b of the hook member 41 can be engaged with the pin member 21b. In the "engaged state" in which the hook member 41 and the pin member 21b are engaged, the door body 20 is supported by the wall body W via the support portion 40.

The position of the hook member 41 in the engaged state is a position that hangs down from the pivot shaft 41a, and hereinafter this position of the hook member 41 will be referred to as the "engaged position." In its natural state, the hook member 41 is located in the engaged position due to its own weight.

In this embodiment, when the door body 20 rises to a predetermined position higher than the open position (see FIG. 6(c), hereinafter, the position of the door body 20 is referred to as the "raised position"), the hook member 41 is displaced to a position where it does not engage with the pin member 21b (hereinafter, referred to as the "non-engaged position" of the hook member 41). Specifically, when the door body 20 rises, the pin member 21b abuts against the pressed portion 41c of the hook member 41 as shown in FIG. 6(b). Then, when the door body 20 (supported portion 21) rises to the raised position shown in FIG. 6(c), the pressed portion 41c is pressed to the right by the pin member 21b, and the hook member 41 is pivoted significantly to the right and positioned in the non-engaged position.

Then, as shown in Figures 6(d) and (e), the door body 20 descends. At this time, the hook member 41 is configured by the damper 42 so that the time required for displacement from the non-engaged position to return to the engaged position is equal to or longer than a predetermined time. Therefore, the pin member 21b does not engage with the hook member 41, and the door body 20 can be displaced below the support portion 40.

Conversely, when the door body 20 is supported by the support portion 40, when the door body 20 rises as shown in FIG. 7(a), the pin member 21b abuts against the inclined portion 41d of the hook member 41 as shown in FIG. 7(b). Then, when the door body 20 rises further as shown in FIG. 7(c), the inclined portion 41d is pressed to the right by the pin member 21b, causing the hook member 41 to rotate slightly. After that, as shown in FIG. 7(d), the door body 20 starts to descend above the hook portion 41b, and as shown in FIG. 7(e), the hook portion 41b of the hook member 41 engages with the pin member 21b, and the door body 20 is supported by the wall body W via the support portion 40.

As shown in Figures 4 and 5, the wall body W of the lift door 10 according to this embodiment is provided with a detection unit 50 that detects the presence or absence of tension applied to the rope r. Specifically, as shown in Figures 8 and 9, the detection unit 50 is provided on the fixed part 40a that constitutes the right support part 40.

The detection unit 50 is composed of a rotating lever 51, a detection roller 52, a contact piece 53, and a contact part 54. The rotating lever 51 is axially supported so as to be freely rotatable with respect to the fixed part 40a. The detection roller 52 is provided at the tip of the rotating lever 51 and is rotatable above the rope r. The contact piece 53 is provided at the middle of the rotating lever 51. The contact part 54 detects whether the contact piece 53 is in contact or not.

When the door body 20 of the lift door 10 is supported by the support part 40 in the upper open position, no tension is applied to the rope r, as shown in Figures 4 and 8. Therefore, the rotating lever 51 in the detection part 50 is positioned downward as shown in Figure 8, and the contact piece 53 contacts the contact part 54. This makes it possible to detect that no tension is applied to the rope r and that the door body 20 is stably supported by the support part 40.

On the other hand, when the electric motor M or the manual handle H is driven to raise or lower the door body 20, tension is applied to the rope r as shown in Figures 5 and 9. Therefore, the rotating lever 51 in the detection unit 50 is positioned upward as shown in Figure 9, and the contact piece 53 is separated from the contact portion 54. This makes it possible to detect that tension is being applied to the rope r and that the door body 20 is suspended by the rope r.

When the door body 20 of the lift door 10 is in the lower closed position, no tension is applied to the rope r, just as in the open position. In other words, the detection unit 50 can detect that the door body 20 is stably supported by the lower ends of the guide rails 11, 11, even when the door body 20 is in the closed position.

As described above, in the lift door 10 according to this embodiment, the detection unit 50 detects whether or not there is tension on the rope r, making it possible to detect whether the door body 20 is suspended by the rope r or supported on the wall W via the support unit 40 or the like. In other words, in this embodiment, it is possible to detect whether or not there is a load on the rope r that suspends and supports the door body 20.

The position and configuration of the detection unit 50 are not limited to this embodiment, and it is also possible to provide it on the side of the wall body W or inside the door body 20. However, from the viewpoint of improving the detection accuracy of the detection unit 50, it is preferable to provide the detection unit 50 between the first fixed pulley 31 and the first fixed pulley P1, or between the second fixed pulley 32 and the second fixed pulley P2, which are the parts where the rope r is positioned downward due to its own weight, as in this embodiment. It is also possible to configure the lift door 10 without providing a detection unit 50.

As described above, according to the lift door 10 of this embodiment, when the door body 20 is in the upper open position, the hook portion 41b, which is a displacement engagement portion, is engaged with the pin member 21b, which is a fixed engagement portion, so that the door body 20 can be supported by the wall body W via the support portion 40. Therefore, even if the door body 20 continues to stand still in the upper open position, the load due to the weight of the door body 20 is not continuously applied to the rope r. In other words, since deformation of the rope r can be suppressed, it is possible to suppress the progression of deterioration over time of the lift door 10 (the mechanism that raises and lowers the door body 20).

More specifically, if a load is continuously applied to the rope r due to the load of the door body 20, the rope r may stretch and deform over time, causing the open or closed position of the door body 20 to drop below a specified position. In the lift door 10 according to this embodiment, the load of the door body 20 in the open position is supported by the support part 40, which prevents the load from being continuously applied to the rope r, and thus suppresses the displacement of the open or closed position of the door body 20.

In addition, in order to detect whether the door body 20 is open or closed, in addition to the detection unit 50, a detection means such as a sensor or limit switch can be provided on the inside of the guide rail 11, and a detected part can be provided on the rope r, so that the position of the door body 20 can be determined by detecting the detected part using the detection means. In this case, if the rope r is stretched and deformed as described above, there is a risk of false detection of the open or closed position of the door body 20. In the lift door 10 according to this embodiment, by preventing continuous load from being applied to the rope r as described above, false detection can be prevented even in this configuration.

The shape and arrangement of the displacement engagement portion and the fixed engagement portion are not limited to this embodiment, and other configurations are also possible. For example, a hook portion provided on the wall W can be the fixed engagement portion, and a pin portion provided on the door body 20 can be the displacement engagement portion. A pin portion can be provided on the wall W as the displacement engagement portion, and a hook portion can be provided on the door body 20 as the fixed engagement portion. A pin portion can be provided on the wall W as the fixed engagement portion, and a hook portion can be provided on the door body 20 as the displacement engagement portion. Furthermore, the displacement engagement portion and the fixed engagement portion are not limited to hooks and pins, and any configuration that engages with each other, such as a hook and a ring, or a lever and a pin, can be used.

In addition, in the lift door 10 according to this embodiment, the hook member 41 is provided with a damper 42, and the damper 42 is configured to ensure that the time required for the hook member 41 to move from the non-engaged position shown in FIG. 6(c) to the engaged position shown in FIG. 6(e) is equal to or longer than a predetermined time. This allows the door body 20 to be displaced below the support portion 40 with a simple configuration, ensuring the time for the hook member 41 to move from the non-engaged position to the engaged position.

In addition, in the lift door 10 according to this embodiment, when the door body 20 is in the open position, the hook member 41 is in an engagement position where it can engage with the pin member 21b. Then, when the door body 20 is raised to the raised position shown in FIG. 6(c), the pressed portion 41c of the hook member 41 is pressed by the pin member 21b, displacing the hook member 41 to the disengaged position. This allows the hook member 41 to be displaced from the engaged position to the disengaged position with a simple configuration that does not use an actuator or the like.

In addition, instead of the damper 42, an actuator (not shown) can be provided on the support portion 40, and the hook member 41 can be displaced between the engaged position and the disengaged position using the actuator. Specifically, when the pin member 21b and the hook portion 41b are disengaged to lower the door body 20 to the closed position, the hook member 41 is positioned in the disengaged position by the actuator while the pin member 21b is positioned above the hook portion 41b. On the other hand, when the pin member 21b and the hook portion 41b are engaged to stop the door body 20 in the open position, the hook member 41 is positioned in the engaged position by the actuator while the pin member 21b is positioned above the hook portion 41b. In this way, even with this configuration, the hook member 41 can be displaced between the disengaged position and the engaged position to appropriately displace the door body 20 above or below the hook portion 41b.

In addition, in the lift door 10 according to this embodiment, the hook member 41 is provided so as to be rotatably displaceable relative to the wall body W. When the door body 20 is raised to the raised position, the pressed portion 41c is pressed by the pin member 21b, causing the hook member 41 to be rotatably displaced to the non-engaged position. In this manner, in this embodiment, by making the hook member 41 rotatably displaceable, it is possible for the hook member 41 to be smoothly displaced between the engaged position and the non-engaged position.

The method of displacement of the hook member 41, which is the displacement engagement part, is not limited to the rotational displacement in this embodiment, and other displacement methods such as sliding displacement can also be adopted. However, from the viewpoint of being able to position the hook member 41 in the engagement position even if an obstacle occurs to the support part 40, a configuration in which the upper end of the hook member 41 is pivotally supported as in this embodiment is preferable.

In addition, in the lift door 10 according to this embodiment, two pin members 21b are provided at positions symmetrical about the vertical center line of the door body 20. Two hook members 41 are provided at positions corresponding to the pin members 21b. In other words, in the lift door 10, two sets of support parts 40 and corresponding supported parts 21 are provided at positions symmetrical about the center line of the lift door 10. Each hook member 41 can be displaced in a direction symmetrical about the center line (outward in the left-right direction in this embodiment).

By configuring as described above, the door body 20 can be stably supported by the two hook members 41. In addition, by making the displacement directions of the hook members 41 symmetrical, the force applied to the door body 20 via the pin members 21b when the door body 20 is supported by the support parts 40 can be offset.

In addition, it is possible for the lift door 10 to have one or more sets of supporting parts 40 and corresponding supported parts 21. However, from the standpoint of stability when supporting the door body 20 and equipment costs, it is preferable to have a configuration in which there are two sets of supporting parts 40 and supported parts 21 as in this embodiment.

10 Lift door (door structure) 11 Guide rail
11a Groove shape 13 Inclined member
15 Cover member 15a Cover opening
15b Cover plate 16 Closing member
16L Left side blocking member 16R Right side blocking member
19 Hinge 20 Door body
21 Supported portion 21a Support plate
21b Pin member (fixed engagement portion)
26U Open side guide roller 26D Closed side guide roller 30L Left door pulley 30R Right door pulley
31 First fixed pulley 32 Second fixed pulley
40 Support part 40a Fixing part
41 Hook member (displacement engagement portion)
41a Rotating shaft 41b Hook portion
41c pressed portion 41d inclined portion
42 Damper
50: Detection unit 51: Rotating lever
52 Detector roller 53 Contact piece
54 Contact part G Floor surface
M Electric motor ML Left motor
MR Right side motor H Manual handle
P1 First fixed pulley P2 Second fixed pulley
U Arrow D Arrow
R1・2 Arrow W Wall
Wa Opening P Packing
Rope

Claims (6)

A wall having an opening formed therein;
a door body provided in a livable manner near the opening on one side of the wall body,
A door structure in which the door main body opens and closes the opening by moving up and down between an upper first position and a lower second position,
A displacement engagement portion is formed on one of the wall body and the door main body, the displacement engagement portion being capable of being displaced relative to the one of the wall body and the door main body,
A fixed engagement portion is formed on the other of the wall body and the door main body such that the other cannot be displaced relative to the wall body,
When the door body is located at the first position, the displacement engagement portion is located at an engagement position where it can engage with the fixed engagement portion, and when the door body is raised to a raised position that is higher than the first position, the displacement engagement portion is displaced to a non-engagement position where it does not engage with the fixed engagement portion,
In an engaged state in which the displacement engagement portion and the fixed engagement portion are engaged with each other, the door main body is supported by the wall body ,
A damper is provided in the displacement engagement portion,
A door structure configured such that the time required for the displacement engagement portion to return from the disengaged position to the engaged position by the damper is equal to or longer than a predetermined time . A wall having an opening formed therein;
a door body provided in a livable manner near the opening on one side of the wall body,
A door structure in which the door main body opens and closes the opening by moving up and down between an upper first position and a lower second position,
A displacement engagement portion is formed on one of the wall body and the door main body, the displacement engagement portion being capable of being displaced relative to the one of the wall body and the door main body,
A fixed engagement portion is formed on the other of the wall body and the door main body such that the other cannot be displaced relative to the wall body,
When the door body is located at the first position, the displacement engagement portion is located at an engagement position where it can engage with the fixed engagement portion, and when the door body is raised to a raised position that is higher than the first position, the displacement engagement portion is displaced to a non-engagement position where it does not engage with the fixed engagement portion,
In an engaged state in which the displacement engagement portion and the fixed engagement portion are engaged with each other, the door main body is supported by the wall body ,
The displacement engagement portion is a hook member that is displaceably provided with respect to the wall body,
The fixed engagement portion is a pin member fixed to an upper surface of the door main body,
When the door body is located at the first position, the hook member is located at an engagement position where it can engage with the pin member, and when the door body is raised to the raised position, the hook member is pressed by the pin member and displaced to the disengagement position . The hook member is provided to be rotatably displaceable with respect to the wall body,
The hook member is formed with a hook portion that engages with the pin member when in the engaged position, and a pressed portion that is formed above the hook portion,
3. The door structure according to claim 2, wherein when the door body is raised to the raised position, the pressed portion is pressed by the pin member, thereby causing the hook member to rotate and displace to the disengaged position. The pin members are provided in two positions symmetrically about a vertical center line of the door body,
The hook members are provided in two positions corresponding to the pin members,
The door structure according to claim 2 or 3 , wherein each of the hook members is displaceable in directions symmetrical with respect to the center line. The door body is suspended by a rope whose one end is connected to a drive unit,
The door structure according to claim 1 , wherein the door body can be raised and lowered by driving the drive unit. The door structure according to claim 5 , wherein the wall body is provided with a detector that detects the presence or absence of tension applied to the rope.

Images