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] This invention relates to an elevator door device having a door panel that opens and closes the elevator entrance, a guide body attached to the lower end of the door panel, and a threshold installed on the floor of the entrance, with a threshold groove on the upper surface into which the guide body is inserted. [Background technology]

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

[0003] [Patent Document 1] Patent Publication No. 2010-241556 Summary of the Invention [Problem to be solved by the invention]

[0004] When the latch has an L-shaped cross section, it is necessary to form an engagement groove on the side of the threshold groove in the width direction, which creates the problem of increasing the width of the threshold. Furthermore, if the cross section of the latch is made straight, the width of the threshold does not increase, but in this case, the depth of the threshold groove must be made deeper than in the conventional structure so that the latch can hook into the side of the threshold groove. However, if the depth of the threshold groove is made deeper than in the conventional structure, the overall height of the threshold increases, which means that the height of the door panel and the height of the car interior must be lowered accordingly, which creates the problem of it being impractical.

[0005] This invention has been 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 making the overall depth of the threshold groove deeper than in conventional structures. [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 a doorway; a guide body attached to the lower end of the door panel; a threshold installed on the floor of the doorway and having a threshold groove on its upper surface into which the guide body is inserted; an engagement groove located directly below the approximate midpoint in the width direction of the door panel when the door panel is fully closed and formed at the bottom of the threshold groove and having a depth lower than the bottom; a slope located in the engagement groove and extending in the opening and closing direction of the door panel, the slope gradually becoming shallower in the depth direction toward the door opening direction; a restricting metal fitting located at the lower end of the door panel and approximately midpoint in the width direction, the restricting metal fitting having a through hole formed in an upper portion that extends in the vertical direction and a guide part formed in a lower portion that can abut against the bottom or the slope and is guided by the abutting surface when abutting against the bottom or the slope; a restricting metal fitting that engages with the engagement groove to restrict upward movement of the door panel when an external force is applied to the door panel when fully closed; and a slide mechanism that engages with the through hole, guiding the restricting metal fitting so that it can be displaced in the vertical direction and supporting it at the lower end of the door panel. [Effects of the Invention]

[0007] The present invention makes it possible to realize an elevator door device that can prevent the door panel from coming off due to an external force without making the overall depth of the threshold groove deeper than before. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing an elevator door device (as a whole) according to Embodiment 1 of the present invention when fully closed. [Figure 2] 1 is a front view showing an elevator door device (as a whole) according to Embodiment 1 of the present invention when fully open. [Figure 3]2 is a front view showing a main part (fully closed state) of the elevator door device of FIG. 1 according to Embodiment 1 of the present invention. [Figure 4] FIG. 4 is a side view of the elevator door device of FIG. 3 according to embodiment 1 of the present invention. [Figure 5] 2 is a front view showing a main part (during a transition operation) of the elevator door device of FIG. 1 according to Embodiment 1 of the present invention. FIG. [Figure 6] 3 is a front view showing a main part of the elevator door device of FIG. 2 according to embodiment 1 of the present invention. [Figure 7] FIG. 7 is a side view of the elevator door device of FIG. 6 according to embodiment 1 of the present invention. [Figure 8] 5 is a side view showing the elevator door device of FIG. 4 in operation (when an external force is applied) according to embodiment 1 of the present invention. FIG. [Figure 9] FIG. 10 is a front view showing a main part of an elevator door device according to a second embodiment of the present invention when the door is fully closed. [Figure 10] FIG. 10 is a side view of the elevator door device of FIG. 9 according to a second embodiment of the present invention. [Figure 11] FIG. 10 is a front view showing a main part of an elevator door device according to a second embodiment of the present invention when the door is fully open. [Figure 12] FIG. 12 is a side view of the elevator door device of FIG. 11 according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Embodiment 1 FIG. 1 is a front view showing an elevator door apparatus (as a whole) according to embodiment 1 of the present invention when it is fully closed. FIG. 2 is a front view showing an elevator door apparatus (as a whole) according to embodiment 1 of the present invention when it is fully open. FIG. 3 is a front view showing a main part of the elevator door apparatus of FIG. 1 according to embodiment 1 of the present invention. FIG. 4 is a side view of the elevator door apparatus of FIG. 3 according to embodiment 1 of the present invention. FIG. 5 is a front view showing a main part (during transition operation) of the elevator door apparatus of FIG. 1 according to embodiment 1 of the present invention. FIG. 6 is a front view showing a main part of the elevator door apparatus of FIG. 2 according to embodiment 1 of the present invention. FIG. 7 is a side view of the elevator door apparatus of FIG. 6 according to embodiment 1 of the present invention. FIG. 8 is a side view showing the elevator door apparatus of FIG. 4 according to embodiment 1 of the present invention when it is operating (when an external force is applied).

[0010] In Fig. 1, a hanger case 1 is fixed above a 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 a plurality of hanger rollers 5 that roll along the hanger rail 2.

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

[0013] 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 over the entire longitudinal length of the door sill 10. The guide body 9 moves within the threshold groove 10a when the door panel 4 is opened or closed, thereby preventing the lower end of the door panel 4 from swinging in the thickness direction of the door panel 4.

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

[0016] The engagement groove 11 has a slope 11a formed along the opening and closing direction of the door panel 4, the depth of which gradually becomes shallower from the position where the regulating fitting 12 engages with the engagement groove 11 toward the door opening direction of the door panel 4.

[0017] A restricting metal fitting 12 is provided at the lower end of the door panel 4 and approximately in the middle in the width direction. The restricting metal fitting 12 engages with the engaging groove 11 when the door panel 4 is fully closed to restrict the upward movement of the door panel 4. The restricting metal 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 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 is formed at the bottom of the regulating fitting 12, which continuously abuts against the bottom portion 10b of the threshold groove 10a and the sloped surface 11a of the engagement groove 11. The guide portion 12a is formed with a sloped surface 12b that can abut along the sloped surface 11a and is guided by the abutment surface when it abuts.

[0020] The slide mechanisms 13a and 13b each pass through the through hole 12c and support the regulating metal fitting 12 at the lower end of the door panel 4. The regulating metal fitting 12 is arranged so that it can be displaced in the vertical direction by its own weight, with the through hole 12c guided by the slide mechanisms 13a and 13b.

[0021] When guided by the slide mechanisms 13a and 13b, the regulating fitting 12 can be displaced in the vertical direction within a range in which the slide mechanism 13a abuts against the upper end of the through hole 12c and the slide mechanism 13b abuts against the lower end of the through hole 12c.

[0022] That is, the amount of displacement (length) of the regulation fitting 12 when it is displaced in the up-down direction is the same as the length of the through hole 12c in the up-down direction. Furthermore, when the regulation fitting 12 is placed in the engagement groove 11, the upper end of the through hole 12c abuts against the slide mechanism 13a.

[0023] When the upper end of through hole 12c abuts against slide mechanism 13a, downward displacement of regulation fitting 12 from this position is prevented. In addition, the depth of engagement groove 11 is long enough to allow slide mechanisms 13a and 13b to displace regulation fitting 12 in the up and down direction.

[0024] 4, when viewed from a cross section perpendicular to the longitudinal direction of the threshold 10, the restraining fitting 12 is formed in a straight shape in the vertical direction from the slide mechanism 13 to the lower end of the guide part 12a. In addition, since the tip of the guide part 12a is formed in a pointed shape, when it abuts against the bottom part 10b and the slope 11a, it always remains in line contact.

[0025] 5 and 6, the operation of the regulating metal fitting 12 in the normal state (the state when the door panel 4 is fully open until just before it is fully closed) will be described. First, when the door panel 4 opens or closes, the regulating metal fitting 12 moves horizontally following the opening or closing movement of the door panel 4, with the lower end of the guide portion 12a abutting against the bottom portion 10b. At this time, the regulating metal fitting 12 is supported by the slide mechanism 13, and is positioned by its own weight so that the lower end of the guide portion 12a is always abutting against the bottom portion 10b.

[0026] Next, the transition operation of the regulating metal fitting 12 from the normal state to the operation preparation state (a state in which the regulating metal fitting 12 is placed in the engaging groove 11 and can engage) will be described with reference to Figure 5. When the door closes just before the door panel 4 is fully closed, the lower end of the guide portion 12a of the regulating metal fitting 12 contacts continuously from the bottom portion 10b to the slope 11a, and when it reaches the slope 11a, the slope 12b contacts the slope 11a and begins to descend under its own weight while being guided.

[0027] When the restricting fitting 12 is guided downward by the slide mechanisms 13a and 13b and the door panel 4 is fully closed, the guide portion 12a and the slope 12b are positioned so as to be engageable within the engagement groove 11. At this time, the upper end of the restricting fitting 12 is supported by abutting the slide mechanism 13a, so that downward movement from this position is prevented. This state is the operation-ready state of the restricting fitting 12.

[0028] Next, we will explain the transition operation from the operation preparation state to the normal state of the regulating fitting 12. When the door panel 4 starts to open from a fully closed state, the regulating fitting 12 moves up from the state where it is positioned within the engagement groove 11 while the slope 12b abuts against the slope 11a.

[0029] When the inclined surface 12b is guided by the inclined surface 11a and the lower end of the guide portion 12a reaches the bottom portion 10b, the regulating fitting 12 follows the door opening operation of the door panel 4, and the lower end of the guide portion 12a moves horizontally while abutting against the bottom portion 10b, transitioning from the operation preparation state to the normal state.

[0030] Next, referring to Fig. 8, an operation will be described in which an external force acts on the door panel 4 when the restricting fitting 12 is in the operation preparation state. First, when the restricting fitting 12 is in the operation preparation state, that is, when the door panel 4 is in the fully closed state, an external force acts on the door panel 4 from the landing entrance / exit side.

[0031] When an external force of a certain level or greater acts on the door panel 4 from the landing entrance / exit side, first, the upper part of the door panel 4 tilts toward the hoistway. When the upper part of the door panel 4 tilts toward the hoistway, the restricting fitting 12 engaged with the engaging groove 11 also tilts toward the hoistway. At this time, when the upper part of the door panel 4 tilts toward the hoistway, the lower end of the guide part 12a abuts against the side surface part 11b of the engaging groove 11 on the landing entrance / exit side.

[0032] After the lower end of the guide portion 12a abuts against the side surface portion 11b of the engagement groove 11 on the landing entrance / exit side, when the upper portion of the door panel 4 tilts toward the elevator shaft, the guide portion 12a is pressed against the side surface portion 11b while abutting against it, so that the regulating fitting 12 gets caught in the engagement groove 11.

[0033] At this time, if an external force acts to move the door panel 4 further upward, the regulating fitting 12 will prevent the door panel 4 from moving upward because the guide portion 12a of the regulating fitting 12 will be caught on the side portion 11b and the upper end of the through hole 12c will be abutting the slide mechanism 13a.

[0034] As a result, when an external force of a certain level or more acts on the door panel 4 from the landing entrance side, the restricting metal fitting 12 prevents the door panel 4 from moving upward, thereby preventing the door panel 4 from coming off the threshold groove 10a.

[0035] As described above, according to the first embodiment, there is provided the door panel 4 that is horizontally moved to open and close the entranceway, the guide body 9 attached to the lower end of the door panel 4, the threshold groove 10a into which the guide body 9 is inserted provided on the upper surface and installed on the floor of the entranceway, the engagement groove 11 that is provided directly below the approximately middle position in the width direction when the door panel 4 is fully closed and is formed in the bottom 10b of the threshold groove 10a and has a depth lower than the position of the bottom 10b, the inclined surface 11a that is provided in the engagement groove 11 and that gradually becomes shallower in the door opening direction of the door panel 4 along the opening and closing direction of the door panel 4, the inclined surface 11a that is located at the lower end of the door panel 4 and approximately middle position in the width direction and that is attached to the upper part in the vertical direction, The door device has a through hole 12c that extends in the vertical direction, and a guide portion 12a that can abut against the bottom portion 10b or the slope 11a at the bottom and is guided by the abutting surface when it abuts. When an external force acts on the door panel 4 when it is fully closed, a restricting fitting 12 engages with the engaging groove 10 to restrict the upward movement of the door panel 4, and is provided with slide mechanisms 13a, 13b that engage with the through hole 12c, guide the restricting fitting 12 so that it can be displaced in the vertical direction, and support it at the lower end of the door panel 4. This makes it possible to realize an elevator door device that can prevent the door panel 4 from coming off due to external forces, without making the overall depth of the threshold groove 10a deeper than in the conventional structure.

[0036] Furthermore, the depth of engagement groove 11 can be made deeper than in embodiment 1 because regulating fitting 12 has at least a length that allows slide mechanisms 13a, 13b to be displaced up and down. For example, engagement groove 11 can be formed so that it deepens downward from bottom 10b of threshold groove 10, and has a shape that penetrates threshold 10. This allows debris and the like to be discharged to the outside from engagement groove 11, making it less likely for debris and the like to accumulate in engagement groove 11.

[0037] Embodiment 2 Fig. 9 is a front view showing a main part of an elevator door apparatus according to a second embodiment of the present invention when it is fully closed. Fig. 10 is a side view of the elevator door apparatus of Fig. 9 according to the second embodiment of the present invention. Fig. 11 is a front view showing a main part of an elevator door apparatus according to the second embodiment of the present invention when it is fully open. Fig. 12 is a side view of the elevator door apparatus of Fig. 11 according to the second embodiment of the present invention.

[0038] The figure explains 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 guide portion 12a is equipped with roller 12d that continuously abuts against the bottom portion of 10b and inclined surface 11a, and slide mechanisms 13a, 13b are equipped with spring 13c that urges regulating fitting 12 downward; other similar parts are given the same symbols and their explanations are omitted.

[0039] In embodiment 1, when guide portion 12a contacts bottom portion 10b and inclined surface 11a, the tip of inclined surface 12b has a pointed shape and is in line contact, so depending on the angle and surface condition when contacting bottom portion 10b and inclined surface 11a, the contact may not be smooth.

[0040] Therefore, in embodiment 2, a roller 12d is provided at the lower end of the regulating metal fitting 12 instead of the guide portion 12a and the inclined surface 12b. When the door panel 4 is opened or closed, the roller 12d rotates while abutting against the bottom portion 10b and the inclined surface 11a.

[0041] Furthermore, the slide mechanisms 13a and 13b are provided with springs 13c that urge the regulation fittings 12 downward. The springs 13c constantly urge the regulation fittings 12 downward so that the guide portions 12a abut against the bottom portion 10b and the inclined surface 11a.

[0042] 11 and 12, the operation of the regulating metal fitting 12 in the normal state (the state when the door panel 4 is just before it is fully closed from when it is fully open) will be described. First, when the door panel 4 is opened or closed from when it is fully open to when it is just before it is fully closed, the regulating metal fitting 12 moves in accordance with the opening or closing movement of the door panel 4 with the roller 12d abutting against the bottom portion 10b.

[0043] At this time, the regulating metal fitting 12 is supported by the slide mechanisms 13a and 13b while being biased downward by the spring 13c, and is disposed at a position where the lower end of the roller 12d abuts against the bottom portion 10b.

[0044] 9 and 10, the transition operation of the regulating fitting 12 from the normal state to the operation preparation state (state in which the regulating fitting 12 is engaged with the engagement groove 11) will be described. When the door panel 4 is in a state from just before being fully closed to being fully closed, the lower end of the roller 12d continuously contacts the slope 11a from the bottom 10b, the roller 12d is guided by the slope 11a, and the regulating fitting 12 begins to descend.

[0045] When the door panel 4 is fully closed, the restricting fitting 12 is supported by the slide mechanisms 13a and 13b and is biased downward by the spring 13c, so that it moves down the inclined surface 11a and is positioned in a state where it can engage with the engaging groove 11. At this time, the restricting fitting 12 is constantly biased downward by the spring 13c, so that it is positioned in a state where it can stably engage with the engaging groove 11, regardless of the angle or surface condition of the restricting fitting 12 when it abuts against the inclined surface 11a.

[0046] When an external force acts on the door panel 4 while the regulating fitting 12 is engaged with the engagement groove 11 and ready to operate, the roller 12d of the regulating fitting 12 gets caught on the side portion 11b and the upper end of the through hole 12c abuts against the slide mechanism 13a, so the regulating fitting 12 prevents the door panel 4 from moving upward.

[0047] As described above, according to the second embodiment, the guide portion 12a is provided with the roller 12d that continuously contacts the bottom portion 10b and the inclined surface 11a, and therefore the roller 12d rotates in contact with the bottom portion 10b and the inclined surface 11a when the door panel 4 is opened or closed. As a result, the regulating fitting 12 is stably disposed on the bottom portion 10b, and is disposed in a state in which it can stably engage with the engaging 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, according to the second embodiment as described above, the slide mechanisms 13a, 13b are provided with the spring 13c that urges the regulating fitting 12 downward, so that the regulating fitting 12 is constantly urged by the spring 13c toward the bottom portion 10b and the inclined surface 11a when the door panel 4 is opened or closed. As a result, the regulating fitting 12 is stably disposed on the bottom portion 10b, and is disposed in a state in which it can stably engage with the engagement groove 11, regardless of the angle or surface condition when the roller 12d abuts against the bottom portion 10b and the inclined surface 11a.

[0049] Although both roller 12d and spring 13c are provided in the second embodiment, only one of them may be provided. Even if only one of them is provided, it goes without saying that the same functions and effects as those of the second embodiment can 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 inclined surface, 11b side portion, 12 regulating metal fitting, 12a guide portion, 12b inclined surface, 12d roller, 13a, 13b slide mechanism, 13c spring [Industrial Applicability]

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

Claims

1. A door panel that moves horizontally to open and close a doorway, a guide body attached to the lower end of the door panel, a threshold that has a threshold groove on its upper surface into which the guide body is inserted and is installed on the floor of the doorway, an engagement groove provided immediately below a substantially central position in the width direction of the door panel when the door panel is fully closed, formed at a bottom of the threshold groove, and having a depth lower than the position of the bottom; a slope provided in the engagement groove, the slope gradually becoming shallower in the door opening direction of the door panel along the opening and closing direction of the door panel; a restricting metal fitting that is disposed at the lower end of the door panel and at a substantially central position in the width direction, has a through hole formed at its upper portion that extends in the vertical direction, and has a guide portion formed at its lower portion that can abut against the bottom or the slope and is guided by the abutting surface when the door panel abuts, and that engages with the engaging groove to restrict upward movement of the door panel when an external force acts on the door panel when the door is fully closed; a slide mechanism that is engaged with the through hole, guides the regulating metal fitting so that it can be displaced in the vertical direction, and supports it on the lower end of the door panel.

2. 2. The elevator door device according to claim 1, wherein the depth of the engagement groove is at least long enough to allow the regulating metal fitting to displace the slide mechanism in the up and down direction.

3. 2. The elevator door device according to claim 1, wherein the guide portion includes a roller that continuously contacts the bottom portion and the inclined surface.

4. 4. The elevator door device according to claim 3, wherein the slide mechanism includes an elastic body that biases the regulating metal fitting downward.

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