Elevator door device

Abstract

To provide an elevator door device capable of preventing door panels from coming off due to external forces without increasing the overall depth of a doorsill groove.SOLUTION: An elevator door device comprises a doorsill installed in an entrance floor, an engaging groove provided just below an approximate intermediate position in the frontage direction in the door panel fully closed state, formed in the bottom part in the doorsill groove, and having a depth lower than the bottom position, an inclined plane provided in the engaging groove, and that its depth direction becomes shallower along the opening / closing direction of the door panel and toward the door panel opening direction, a restriction metal fitting, and a slide mechanism provided with the engaged state in a through hole, to guide the restriction metal fitting displaceably in the vertical direction, and supported by the lower end part of the door panel, where the restriction metal fitting is arranged at the lower end part of the door panel and at an approximately middle position in the frontage direction, in the upper part of which a through hole extending vertically is formed, in the lower part of which the guide part capable of abutting against the bottom part or the inclined surface, guided by an abutment surface upon the abutting is formed, and restricts the upward movement of the door panel by engaging with the engaging groove when the external force acts on the door panel fully closed.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an elevator door device having a threshold provided on the floor of an entrance, a door panel for opening and closing the entrance of the elevator, a guide body attached to the lower end of the door panel, and a threshold groove into which the guide body is inserted provided on the upper surface.

Background Art

[0002] In a conventional elevator door device, in order to prevent the door panel from coming off due to an external force, a cross-sectional L-shaped latch fitting that restricts the upward movement of the door panel is attached to the lower end of the door panel. Further, an engagement groove that engages with this latch fitting is formed in the threshold groove (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the latch fitting has a cross-sectional L-shape, it is necessary to form an engagement groove on the side surface in the width direction of the threshold groove, so there is a problem that the width of the threshold increases. Also, if the cross-section of the latch fitting is a straight shape, the width of the threshold does not increase. However, in this case, it is necessary to make the depth of the threshold groove deeper than the conventional structure so that the latch fitting catches on the side surface of the threshold groove. However, if the depth of the threshold groove is made deeper than the conventional structure, the overall height of the threshold increases, so it is necessary to make the height of the door panel and the height inside the car lower than before, which has the problem of being impractical.

[0005] This invention was made to solve the above-mentioned problems, and its purpose is to provide an elevator door device that can prevent the door panel from coming off due to external force without increasing the overall depth of the threshold groove compared to the conventional structure. [Means for solving the problem]

[0006] The door device for an elevator door in this invention is characterized by comprising: a door panel that moves horizontally to open and close an entrance; a guide body attached to the lower end of the door panel; a sill groove into which the guide body is inserted, provided on the upper surface of the sill, which is installed on the floor of the entrance; an engagement groove provided directly below a position approximately midway in the width direction when the door panel is fully closed, formed at the bottom of the sill groove, and having a depth lower than the position of the bottom; a slope provided in the engagement groove, which is aligned with the opening and closing direction of the door panel and whose depth gradually decreases toward the opening direction of the door panel; a guide part provided at the lower end of the door panel and approximately midway in the width direction, which has a through hole formed at the top that extends in the vertical direction and a guide part formed at the bottom that can abut against the bottom or slope and is guided by the abutment surface when an external force is applied to the door panel when it is fully closed, which engages with the engagement groove to restrict the upward movement of the door panel; and a slide mechanism provided that engages with the through hole, which guides the restricting fitting so that it can be displaced in the vertical direction and supports it at the lower end of the door panel. [Effects of the Invention]

[0007] This invention makes it possible to realize an elevator door device that can prevent the door panel from coming off due to external force without increasing the overall depth of the threshold groove compared to conventional devices. [Brief explanation of the drawing]

[0008] [Figure 1] This is a front view showing the elevator door device (overall) according to Embodiment 1 of this invention in the fully closed position. [Figure 2] This is a front view showing the elevator door device (overall) in the fully open position according to Embodiment 1 of this invention. [Figure 3]This is a front view showing the main part (when fully closed) of the elevator door device shown in Figure 1 according to Embodiment 1 of this invention. [Figure 4] This is a side view of the elevator door device shown in Figure 3, according to Embodiment 1 of this invention. [Figure 5] This is a front view showing the main part (during transition operation) of the elevator door device shown in Figure 1 according to Embodiment 1 of this invention. [Figure 6] This is a front view showing the main parts of the elevator door device shown in Figure 2 according to Embodiment 1 of this invention. [Figure 7] This is a side view of the elevator door device shown in Figure 6, according to Embodiment 1 of this invention. [Figure 8] This is a side view showing the operation (when an external force is applied) of the elevator door device shown in Figure 4 according to Embodiment 1 of this invention. [Figure 9] This is a front view showing the main parts of the elevator door device according to Embodiment 2 of this invention when it is fully closed. [Figure 10] This is a side view of the elevator door device shown in Figure 9, according to Embodiment 2 of the present invention. [Figure 11] This is a front view showing the main part of the elevator door device according to Embodiment 2 of this invention when it is fully open. [Figure 12] This is a side view of the elevator door device shown in Figure 11, according to Embodiment 2 of the present invention. [Modes for carrying out the invention]

[0009] Embodiment 1. Figure 1 is a front view showing the elevator door device (overall) in the fully closed position according to Embodiment 1 of this invention. Figure 2 is a front view showing the elevator door device (overall) in the fully open position according to Embodiment 1 of this invention. Figure 3 is a front view showing the main part of the elevator door device of Figure 1 according to Embodiment 1 of this invention. Figure 4 is a side view of the elevator door device of Figure 3 according to Embodiment 1 of this invention. Figure 5 is a front view showing the main part of the elevator door device of Figure 1 (during transition operation) according to Embodiment 1 of this invention. Figure 6 is a front view showing the main part of the elevator door device of Figure 2 according to Embodiment 1 of this invention. Figure 7 is a side view of the elevator door device of Figure 6 according to Embodiment 1 of this invention. Figure 8 is a side view showing the elevator door device of Figure 4 during operation (when external force is applied) according to Embodiment 1 of this invention.

[0010] In Figure 1, a hanger case 1 is fixed above the landing entrance (not shown). A hanger rail 2 is provided on the hanger case 1. A pair of door panels 4 are suspended from the hanger rail 2 via a pair of door hangers 3. The landing entrance is opened and closed by the door panels 4.

[0011] The door hanger 3 is fixed to the upper end of the door panel 4. Each door hanger 3 is provided with multiple hanger rollers 5 that roll along the hanger rail 2.

[0012] An interlocking pulley 6 is provided near one end of the hanger case 1 in the longitudinal direction, and an interlocking pulley 7 is provided near the other end of the hanger case 1 in the longitudinal direction. A rope 8 is wound between the interlocking pulleys 6 and 7. The lower part of the rope 8 is connected to one door hanger 3. The upper part of the rope 8 is connected to the other door hanger 3.

[0013] In Figure 3, a pair of guide bodies (door legs) 9 are attached to the lower end of each door panel 4. A threshold 10 is installed on the floor of the landing entrance. A threshold groove 10a into which the guide bodies 9 are inserted is provided on the upper surface of the threshold 10.

[0014] The threshold groove 10a is provided across the entire longitudinal direction of the threshold 10. The guide body 9 is moved within the threshold groove 10a during the opening and closing operation of the door panel 4. This prevents the lower end of the door panel 4 from swaying in the thickness direction of the door panel 4.

[0015] When the door panel 4 is viewed from the frontage direction when the door panel 4 is fully closed, an engagement groove 11 is formed at the bottom 10b in the threshold groove 10a directly below the substantially middle position in the frontage direction of the door panel 4.

[0016] In the engagement groove 11, along the opening and closing direction of the door panel 4, a slope 11a is formed whose depth gradually becomes shallower from the position where the regulating fitting 12 engages with the engagement groove 11 towards the door-opening direction of the door panel 4.

[0017] At the lower end and substantially middle position in the frontage direction of the door panel 4, a regulating fitting 12 is provided which engages with the engagement groove 11 when the door panel 4 is fully closed to regulate the upward movement of the door panel 4. The regulating fitting 12 is supported at the lower end of the door panel 4 by slide mechanisms 13a, 13b fixed to the lower part of the door panel 4.

[0018] A through hole 12c formed by extending in the vertical direction is formed in the upper part of the regulating fitting 12. The slide mechanism 13a is disposed above the through hole 12c, and the slide mechanism 13b is disposed below the through hole 12c.

[0019] A guide portion 12a that continuously abuts against the bottom 10b of the threshold groove 10a and the slope 11a of the engagement groove 11 is formed at the lower part of the regulating fitting 12. On the guide portion 12a, a slope 12b is formed that can abut along the slope 11a and is guided by the abutting surface when abutting.

[0020] The sliding mechanisms 13a and 13b each pass through the through-hole 12c and support the regulating bracket 12 at the lower end of the door panel 4. The regulating bracket 12 is positioned so that it can be displaced vertically by its own weight, with the through-hole 12c guided by the sliding mechanisms 13a and 13b.

[0021] When the restricting fitting 12 is displaced guided by the sliding mechanisms 13a and 13b, the sliding mechanism 13a can be displaced vertically within the range in which it contacts the upper end of the through hole 12c, and the sliding mechanism 13b can contact the lower end of the through hole 12c.

[0022] In other words, the amount of displacement (length) when the restricting fitting 12 is displaced vertically is the same as the vertical length of the through hole 12c. Also, when the restricting fitting 12 is positioned in the engagement groove 11, the upper end of the through hole 12c abuts against the sliding mechanism 13a.

[0023] When the upper end of the through hole 12c contacts the sliding mechanism 13a, the restricting fitting 12 is prevented from being displaced downward from this position. Furthermore, the depth of the engagement groove 11 is such that the sliding mechanisms 13a and 13b can displace the restricting fitting 12 in the vertical direction.

[0024] In Figure 4, the restricting fitting 12 is formed in a straight shape vertically from the sliding mechanism 13 to the lower end of the guide portion 12a when viewed from a cross section perpendicular to the longitudinal direction of the sill 10. Furthermore, since the tip of the guide portion 12a is formed in a pointed shape, it is always in line contact when it abuts the bottom portion 10b and the inclined surface 11a.

[0025] Next, Figures 5-6 will explain the operation of the restrictor fitting 12 in its normal state (from when the door panel 4 is fully open until just before it is fully closed). First, when the door panel 4 opens and closes, the restrictor fitting 12 moves horizontally in accordance with the opening and closing movement of the door panel 4, with the lower end of the guide portion 12a in contact with the bottom portion 10b. At this time, the restrictor fitting 12 is supported by the sliding mechanism 13 and is positioned so that the lower end of the guide portion 12a is always in contact with the bottom portion 10b due to its own weight.

[0026] Next, in Figure 5, the transition operation of the restricting fitting 12 from the normal state to the ready-to-operate state (the state in which the restricting fitting 12 is positioned in the engagement groove 11 and can be engaged) will be explained. When the door panel 4 is closed from just before it is fully closed, the lower end of the guide portion 12a of the restricting fitting 12 continuously contacts the slope 11a from the bottom portion 10b until it reaches the slope 11a. Once the slope 12b contacts the slope 11a and is guided downward by its own weight.

[0027] When the restricting fitting 12 is guided down by the sliding mechanisms 13a and 13b and the door panel 4 is fully closed, the guide portion 12a and the inclined surface 12b are positioned to engage within the engagement groove 11. At this time, the upper end of the restricting fitting 12 is in contact with and supported by the sliding mechanism 13a, so downward movement from this position is prevented. This state is the ready state for operation of the restricting fitting 12.

[0028] Next, the transition operation of the restrictor fitting 12 from the ready state to the normal state will be explained. When the door panel 4 is opened from a fully closed position, the restrictor fitting 12 rises from its position within the engagement groove 11, with the inclined surface 12b contacting the inclined surface 11a.

[0029] As the inclined surface 12b is guided by the inclined surface 11a, and the lower end of the guide portion 12a reaches the bottom 10b, the regulating fitting 12 moves horizontally in accordance with the opening movement of the door panel 4, with the lower end of the guide portion 12a contacting the bottom 10b, and transitions from the ready-to-operate state to the normal state.

[0030] Next, in Figure 8, we will explain the operation when an external force is applied to the door panel 4 while the restrictor fitting 12 is in the ready-to-operate state. First, when the restrictor fitting 12 is in the ready-to-operate state, that is, when the door panel 4 is in the fully closed state, an external force is applied to the door panel 4 from the landing entrance side.

[0031] When an external force exceeding a certain amount is applied to the door panel 4 from the landing entrance side, the upper part of the door panel 4 first tilts toward the hoistway side. When the upper part of the door panel 4 tilts toward the hoistway side, the regulating fitting 12 engaged with the engagement groove 11 also tilts toward the hoistway side. At this time, when the upper part of the door panel 4 tilts toward the hoistway side, the lower end of the guide portion 12a comes into contact with the side portion 11b of the engagement groove 11 on the landing entrance side.

[0032] After the lower end of the guide portion 12a comes into contact with the side portion 11b of the engagement groove 11 on the landing entrance side, and then the upper part of the door panel 4 is tilted toward the elevator shaft, the guide portion 12a is pressed against the side portion 11b while coming into contact with it, causing the regulating fitting 12 to catch on the engagement groove 11.

[0033] At this time, if an external force is applied that moves the door panel 4 upward, the regulating fitting 12 prevents the door panel 4 from moving upward because the guide portion 12a catches on the side portion 11b and the upper end of the through hole 12c abuts against the sliding mechanism 13a.

[0034] As a result, when an external force exceeding a certain amount is applied to the door panel 4 from the landing entrance side, the regulating fitting 12 prevents the door panel 4 from moving upward, thereby preventing it from coming out of the threshold groove 10a.

[0035] As described above, according to Embodiment 1, a door panel 4 that moves horizontally to open and close the entrance, a guide body 9 attached to the lower end of the door panel 4, a sill groove 10a into which the guide body 9 is inserted is provided on the upper surface, a sill 10 installed on the floor of the entrance, an engagement groove 11 provided directly below the approximately midpoint position in the opening direction when the door panel 4 is fully closed, formed in the bottom 10b of the sill groove 10a and having a depth lower than the position of the bottom 10b, a slope 11a provided in the engagement groove 11, which gradually becomes shallower in the depth direction toward the opening direction of the door panel 4 along the opening and closing direction of the door panel 4, and positioned at the lower end of the door panel 4 and approximately midpoint in the opening direction, with an upper vertical A through hole 12c with a shape that extends in the direction is formed, and a guide portion 12a is formed at the lower part that can abut against the bottom portion 10b or the inclined surface 11a and is guided by the abutment surface when it makes contact. When an external force is applied to the door panel 4 when it is fully closed, a restricting fitting 12 engages with the engagement groove 10 to restrict the upward movement of the door panel 4. A sliding mechanism 13a, 13b is provided that engages with the through hole 12c and guides the restricting fitting 12 so that it can be displaced in the vertical direction and is supported at the lower end of the door panel 4. By providing these features, an elevator door device can be realized that prevents the door panel 4 from coming off due to external force without increasing the overall depth of the sill groove 10a compared to conventional structures.

[0036] Furthermore, the depth of the engagement groove 11 can be made deeper than in Embodiment 1 by ensuring that the regulating fitting 12 has a length that allows the sliding mechanisms 13a and 13b to be displaced vertically. For example, the engagement groove 11 can be formed to deepen downwards from the bottom 10b of the sill groove 10, and to penetrate the sill 10. This allows debris to be discharged outwards from the engagement groove 11, making it less likely for debris to accumulate in the engagement groove 11.

[0037] Embodiment 2. Figure 9 is a front view of the elevator door device in the fully closed position, showing the main parts of the elevator door device according to Embodiment 2 of this invention. Figure 10 is a side view of the elevator door device of Figure 9 according to Embodiment 2 of this invention. Figure 11 is a front view of the elevator door device in the fully open position, showing the main parts of the elevator door device according to Embodiment 2 of this invention. Figure 12 is a side view of the elevator door device of Figure 11 according to Embodiment 2 of this invention.

[0038] The figure illustrates an elevator door device according to Embodiment 2 of the present invention. The elevator door device according to Embodiment 2 of the present invention differs in that the guide section 12a is equipped with a roller 12d that continuously contacts the bottom 10b and the inclined surface 11a, and the sliding mechanisms 13a and 13b are equipped with a spring 13c that biases the regulating fitting 12 downward. The same symbols are used for other similar parts, and their explanations are omitted.

[0039] In Embodiment 1, when the guide portion 12a contacts the bottom portion 10b and the inclined surface 11a, the tip of the inclined surface 12b has a pointed shape and makes line contact. Therefore, depending on the angle and surface condition when it contacts the bottom portion 10b and the inclined surface 11a, it may not make smooth contact.

[0040] Therefore, in the second embodiment, a roller 12d is provided at the lower end of the restricting fitting 12 instead of the guide portion 12a and the inclined surface 12b. The roller 12d rotates while contacting the bottom portion 10b and the inclined surface 11a when the door panel 4 is opened and closed.

[0041] Furthermore, the sliding mechanisms 13a and 13b are provided with springs 13c that bias the restricting fitting 12 downward. The springs 13c constantly bias the restricting fitting 12 downward so that the guide portion 12a contacts the bottom portion 10b and the inclined surface 11a.

[0042] Next, Figures 11-12 will explain the operation of the restrictor fitting 12 in its normal state (from when the door panel 4 is fully open until just before it is fully closed). First, when the door panel 4 opens and closes from the fully open state until just before it is fully closed, the restrictor fitting 12 moves in accordance with the opening and closing movement of the door panel 4, with the roller 12d in contact with the bottom 10b.

[0043] At this time, the restricting fitting 12 is supported by the sliding mechanisms 13a and 13b while being biased downward by the spring 13c, and is positioned so that the lower end of the roller 12d is in contact with the bottom 10b.

[0044] Next, Figures 9-10 will explain the transition operation of the restricting fitting 12 from its normal state to the ready-to-operate state (the state in which the restricting fitting 12 is engaged with the engagement groove 11). In the state from just before the door panel 4 is fully closed until it is fully closed, when the door panel 4 is closed, the lower end of the roller 12d comes into continuous contact with the slope 11a from the bottom 10b, the roller 12d is guided by the slope 11a, and the restricting fitting 12 begins to descend.

[0045] When the door panel 4 is fully closed, the restrictor fitting 12, supported by the sliding mechanisms 13a and 13b and biased downward by the spring 13c, descends the inclined surface 11a and is positioned to engage with the engagement groove 11. At this time, since the restrictor fitting 12 is always biased downward by the spring 13c, it is positioned to stably engage with the engagement groove 11 regardless of the angle or surface condition when it contacts the inclined surface 11a.

[0046] When an external force is applied to the door panel 4 while the restricting fitting 12 is engaged with the engagement groove 11 and ready to operate, the restricting fitting 12 prevents the door panel 4 from moving upward because the roller 12d catches on the side portion 11b and the upper end of the through hole 12c is in contact with the sliding mechanism 13a.

[0047] As described above, according to Embodiment 2, the guide portion 12a is equipped with a roller 12d that continuously contacts the bottom portion 10b and the inclined surface 11a. Therefore, when the door panel 4 is opened and closed, the roller 12d contacts the bottom portion 10b and the inclined surface 11a and rotates. As a result, the regulating fitting 12 is stably positioned on the bottom portion 10b and stably engaged with the engagement groove 11, regardless of the angle or surface condition when the roller 12d contacts the bottom portion 10b and the inclined surface 11a.

[0048] Furthermore, as described above, according to Embodiment 2, the slide mechanisms 13a and 13b are equipped with a spring 13c that biases the restricting fitting 12 downward. Therefore, when the door panel 4 is opened and closed, the restricting fitting 12 is always biased toward the bottom 10b and the inclined surface 11a by the spring 13c. As a result, the restricting fitting 12 is stably positioned on the bottom 10b and stably positioned to engage with the engagement groove 11, regardless of the angle or surface condition when the roller 12d contacts the bottom 10b and the inclined surface 11a.

[0049] In Embodiment 2, both the roller 12d and the spring 13c are provided, but either one or the other may be provided. Needless to say, even if only one of them is provided, the same functions and effects as in Embodiment 2 will be achieved. [Explanation of Symbols]

[0050] 1 Hanger case, 2 Hanger rail, 3 Door hanger, 4 Door panel, 5 Hanger roller, 6,7 Interlocking pulley, 8 Rope, 9 Guide body (door leg), 10 Threshold, 10a Threshold groove, 10b Bottom, 11 Engagement groove, 11a Slope, 11b Side, 12 Restricting fitting, 12a Guide part, 12b Slope, 12d Roller, 13a,13b Sliding mechanism, 13c Spring [Industrial applicability]

[0051] The present invention relates to an elevator door device having a threshold installed on the floor of the elevator entrance.

Claims

1. A door panel that moves horizontally to open and close an entrance, a guide body attached to the lower end of the door panel, a threshold groove into which the guide body is inserted is provided on the upper surface, and a threshold is installed on the floor of the entrance. The aforementioned door panel is located directly below a position approximately midway in the opening direction when fully closed, and an engagement groove is formed at the bottom of the threshold groove, having a depth lower than the position of the bottom, A slope is provided in the engagement groove, and along the opening and closing direction of the door panel, the depth gradually decreases toward the door panel opening direction. A restricting fitting is positioned at the lower end of the door panel and approximately midway in the width direction, with a through hole formed at the top that extends vertically, and a guide portion formed at the bottom that can contact the bottom or the slope and is guided by the contact surface when it contacts, and when an external force is applied to the door panel when it is fully closed, it engages with the engagement groove to restrict the upward movement of the door panel. An elevator door device characterized by comprising a sliding mechanism provided in engagement with the aforementioned through hole, which guides the restricting fitting so as to be displaceable in the vertical direction and supports it at the lower end of the door panel.

2. The elevator door device according to claim 1, characterized in that the depth of the engagement groove is at least long enough to allow the regulating fitting to displace the sliding mechanism in the vertical direction.

3. The elevator door device according to claim 1, characterized in that the guide portion comprises rollers that continuously contact the bottom and the inclined surface.

4. The elevator door device according to claim 3, characterized in that the sliding mechanism comprises an elastic body that biases the restricting fitting downward.

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