Door device of elevator

Abstract

The invention provides a door device of an elevator, which comprises a sill arranged on a floor part of an entrance and exit; an engagement groove which is formed at the bottom in the sill groove, is provided directly below a substantially intermediate position in the lateral width direction of the door panel when the door panel is fully closed, and has a depth lower than the position of the bottom; an inclined surface which is provided in the engagement groove and has a depth direction gradually shallower toward the door opening direction of the door panel along the opening / closing direction of the door panel; and a restriction fitting which is disposed at the lower end of the door panel and at a substantially intermediate position in the widthwise direction, has a through-hole formed in the upper portion thereof so as to extend in the vertical direction, and has a guide portion formed in the lower portion thereof so as to be capable of coming into contact with the bottom portion or the inclined surface and guiding the contact surface when the guide portion comes into contact with the bottom portion or the inclined surface. The limiting accessory is clamped with the clamping groove to limit the upward movement of the door plate; and a sliding mechanism that is provided so as to engage with the through-hole, guides the restriction fitting so as to be displaceable in the vertical direction, and supports the restriction fitting at the lower end of the door panel.

Description

Technical Field

[0001] The present invention relates to an elevator door device, which comprises: a door panel for opening and closing the entrance and exit of the elevator; a guide body installed at the lower end of the door panel; and a sill arranged on the floor portion of the entrance and exit, and having a sill groove on the upper surface for inserting the guide body. Background Art

[0002] In conventional elevator door devices, in order to prevent the door panel from coming out due to external forces, a clip with an L-shaped cross section is installed at the lower end of the door panel to limit the upward movement of the door panel. In addition, an engagement groove is formed in the sill groove to engage with the clip (see, for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2010-241556 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] If the hanging member has an L-shaped cross-section, a snap-fitting groove must be formed on the side of the sill groove in the horizontal direction, which leads to a problem of increasing the width of the sill. Alternatively, if the hanging member has a straight cross-section, the sill width will not increase, but in this case, the sill groove must be deeper than in conventional structures so that the hanging member can be engaged with the side of the sill groove. However, if the sill groove is deeper than in conventional structures, the overall height of the sill increases, requiring the door panel and the interior height of the car to be lowered accordingly, which is impractical.

[0008] The present invention has been made to solve the above-mentioned problems, and its object is to provide an elevator door device that can prevent the door panel from coming out due to external force without making the overall depth of the sill groove deeper than in the conventional structure.

[0009] Means for solving problems

[0010] The door device of the elevator door of the present invention is characterized in that it comprises: a door panel that moves horizontally to open and close the entrance and exit; a guide body that is installed at the lower end of the door panel; a sill that is arranged on the floor portion of the entrance and exit, and is provided with a sill groove for inserting the guide body on the upper surface; a locking groove that is formed at the bottom of the sill groove and is arranged just below the approximately middle position in the horizontal width direction of the door panel when fully closed, and has a depth lower than that of the bottom position; and a slope that is provided in the locking groove and gradually increases in depth along the opening and closing direction of the door panel toward the door opening direction of the door panel. Gradually shallow; a limiting accessory, which is arranged at the lower end of the door panel and approximately in the middle of the horizontal width direction, is formed with a through hole in the upper part that extends in the up-down direction, and is formed with a guide portion at the lower part that can abut against the bottom or the inclined surface and guide the abutting surface when abutted. When an external force acts on the door panel when it is fully closed, the limiting accessory engages with the engaging groove to limit the upward movement of the door panel; and a sliding mechanism, which is configured to engage with the through hole, guides the limiting accessory in a manner that it can be displaced in the up-down direction and supports it at the lower end of the door panel.

[0011] Effects of the Invention

[0012] The present invention can realize an elevator door device which does not make the overall depth of the sill groove deeper than before and can prevent the door panel from falling out due to external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view showing the elevator door device (entire door device) in the fully closed state according to Embodiment 1 of the present invention.

[0014] Figure 2 This is a front view showing the elevator door device (entire door device) in the fully opened state according to Embodiment 1 of the present invention.

[0015] Figure 3 This is a diagram showing the first embodiment of the present invention. Figure 1 A front view of the main parts of the elevator door device (when fully closed).

[0016] Figure 4 This is the first embodiment of the present invention Figure 3 Side view of the door mechanism of an elevator.

[0017] Figure 5 This is a diagram showing the first embodiment of the present invention. Figure 1 A front view of the main parts of the elevator door device (during transfer operation).

[0018] Figure 6 This is a diagram showing the first embodiment of the present invention. Figure 2 A front view of the main parts of an elevator door device.

[0019] Figure 7This is the first embodiment of the present invention Figure 6 Side view of the door mechanism of an elevator.

[0020] Figure 8 This is a diagram showing the first embodiment of the present invention. Figure 4 A side view of the elevator door device in action (when external force is applied).

[0021] Figure 9 This is a front view showing the main parts of the elevator door device according to Embodiment 2 of the present invention when the door is fully closed.

[0022] Figure 10 This is the second embodiment of the present invention Figure 9 Side view of the door mechanism of an elevator.

[0023] Figure 11 This is a front view showing the main parts of the elevator door device according to Embodiment 2 of the present invention when the door is fully opened.

[0024] Figure 12 This is the second embodiment of the present invention Figure 11 Side view of the door mechanism of an elevator.

[0025] Label Description

[0026] 1: Hanger housing; 2: Hanger guide rail; 3: Door hanger; 4: Door panel; 5: Hanger roller; 6, 7: Linkage pulleys; 8: Rope; 9: Guide body (door foot); 10: Sill; 10a: Sill groove; 10b: Bottom; 11: Engaging groove; 11a: Inclined surface; 11b: Side surface; 12: Limiting accessory; 12a: Guide part; 12b: Inclined surface; 12d: Roller; 13a, 13b: Sliding mechanism; 13c: Spring. DETAILED DESCRIPTION

[0027] Implementation method 1.

[0028] Figure 1 This is a front view showing the elevator door device (entire door device) in the fully closed state according to Embodiment 1 of the present invention. Figure 2 This is a front view showing the elevator door device (entire door device) in the fully opened state according to Embodiment 1 of the present invention. Figure 3 This is a diagram showing the first embodiment of the present invention. Figure 1 A front view of the main parts of an elevator door device. Figure 4 This is the first embodiment of the present invention Figure 3 Side view of the door mechanism of an elevator. Figure 5 This is a diagram showing the first embodiment of the present invention. Figure 1 A front view of the main parts of the elevator door device (during transfer operation). Figure 6 This is a diagram showing the first embodiment of the present invention. Figure 2A front view of the main parts of an elevator door device. Figure 7 This is the first embodiment of the present invention Figure 6 Side view of the door mechanism of an elevator. Figure 8 This is a diagram showing the first embodiment of the present invention. Figure 4 A side view of the elevator door device in action (when external force is applied).

[0029] exist Figure 1 In the example, a hanger housing 1 is fixed above a landing entrance (not shown). A hanger rail 2 is provided on the hanger housing 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.

[0030] The door hanger 3 is fixed to the upper end portion of the door panel 4. Each door hanger 3 is provided with a plurality of hanger rollers 5 that roll along the hanger guide rail 2.

[0031] An interlocking pulley 6 is provided near one longitudinal end of the hanger housing 1, and an interlocking pulley 7 is provided near the other longitudinal end of the hanger housing 1. A rope 8 is wound between the interlocking pulleys 6 and 7. The lower portion of the rope 8 is connected to one door hanger 3. The upper portion of the rope 8 is connected to the other door hanger 3.

[0032] exist Figure 3 In the embodiment, a pair of guide bodies (door legs) 9 are installed at the lower end of each door panel 4. A sill 10 is provided on the floor portion of the landing entrance. A sill groove 10a is provided on the upper surface of the sill 10 for the guide body 9 to be inserted.

[0033] The sill groove 10a is provided along the entire length of the sill 10. The guide body 9 moves in the sill groove 10a during the opening and closing of the door panel 4. This prevents the lower end of the door panel 4 from vibrating in the thickness direction of the door panel 4.

[0034] When the door panel 4 is viewed in the width direction when the door panel 4 is fully closed, an engagement groove 11 is formed in the bottom 10b of the sill groove 10a just below a substantially middle position in the width direction of the door panel 4.

[0035] The engagement groove 11 has a slope 11 a whose depth gradually becomes shallower from the position where the restriction fitting 12 engages with the engagement groove 11 toward the door opening direction of the door panel 4 along the opening and closing direction of the door panel 4 .

[0036] A limiting fitting 12 is provided at the lower end of the door panel 4 and approximately in the middle of its width. When the door panel 4 is fully closed, the limiting fitting 12 engages with the engagement groove 11 to limit the upward movement of the door panel 4. The limiting fitting 12 is supported at the lower end of the door panel 4 by sliding mechanisms 13a and 13b fixed to the lower portion of the door panel 4.

[0037] A through hole 12c extending in the vertical direction is formed in the upper portion of the restriction fitting 12. The sliding mechanism 13a is arranged in the upper portion of the through hole 12c, and the sliding mechanism 13b is arranged in the lower portion of the through hole 12c.

[0038] A guide portion 12a is formed at the lower portion of the restricting fitting 12 to continuously contact the bottom 10b of the sill groove 10a and the inclined surface 11a of the engagement groove 11. The guide portion 12a has an inclined surface 12b formed thereon, which can contact along the inclined surface 11a and be guided by the contact surface during contact.

[0039] The slide mechanisms 13a and 13b respectively penetrate the through hole 12c and support the restriction fitting 12 at the lower end of the door panel 4. The restriction fitting 12 is arranged so as to be displaceable in the vertical direction by its own weight while being guided by the slide mechanisms 13a and 13b along the through hole 12c.

[0040] When displaced by the slide mechanisms 13a and 13b, the restriction fitting 12 is vertically displaceable within a range from when the slide mechanism 13a contacts the upper end of the through hole 12c to when the slide mechanism 13b contacts the lower end of the through hole 12c.

[0041] That is, the displacement amount (length) of the restriction fitting 12 when displaced in the vertical direction is equal to the vertical length of the through hole 12c. In addition, when the restriction fitting 12 is arranged in the engagement groove 11, the upper end of the through hole 12c abuts against the sliding mechanism 13a.

[0042] When the upper end of the through hole 12c contacts the sliding mechanism 13a, the limiting fitting 12 is prevented from being displaced downward from this position. In addition, the depth of the engagement groove 11 has a length that allows the sliding mechanisms 13a and 13b to be displaced in the vertical direction along the limiting fitting 12.

[0043] exist Figure 4 In the embodiment, the restricting fitting 12 is formed in a straight shape in the vertical direction 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 front end of the guide portion 12a is formed in a pointed shape, it always maintains a linear contact state when abutting against the bottom portion 10b and the inclined surface 11a.

[0044] Then, in Figures 5 and 6 The following describes the operation of the restricting fitting 12 in its normal state (the state from when the door panel 4 is fully open to just before it is fully closed). First, when the door panel 4 opens and closes, the restricting fitting 12 moves horizontally, following the opening and closing 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 restricting fitting 12 is supported by the sliding mechanism 13 and, due to its own weight, is positioned so that the lower end of the guide portion 12a always contacts the bottom portion 10b.

[0045] Next, in Figure 5 , the transition of the restricting fitting 12 from the normal state to the action-ready state (the state in which the restricting fitting 12 is disposed in the engagement groove 11 and can be engaged) is described. When the door panel 4 is about to fully close, the lower end of the guide portion 12a of the restricting fitting 12 continuously abuts from the bottom 10b to the inclined surface 11a and reaches the inclined surface 11a. The restricting fitting 12 then begins to descend under its own weight while being guided by the inclined surface 12b abutting against the inclined surface 11a.

[0046] When the restricting fitting 12 is guided downward 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 in an engaging manner within the engaging groove 11. At this point, the upper end of the restricting fitting 12 is supported by the sliding mechanism 13a, preventing the restricting fitting 12 from moving downward from this position. This state represents the restricting fitting 12's operational readiness.

[0047] Next, the transition from the ready state to the normal state of the restricting fitting 12 will be described. When the door panel 4 opens from the fully closed state, the restricting fitting 12 rises from the state arranged in the engagement groove 11 while the inclined surface 12b contacts the inclined surface 11a.

[0048] When the inclined surface 12b is guided by the inclined surface 11a and the lower end of the guide part 12a reaches the bottom 10b, the limiting accessory 12 follows the opening action of the door panel 4, moves in the horizontal direction while the lower end of the guide part 12a abuts against the bottom 10b, and transfers from the action preparation state to the normal state.

[0049] Then, in Figure 8 In the following, the operation when an external force acts on the door panel 4 when the restriction fitting 12 is in the ready state will be described. First, when the restriction fitting 12 is in the ready state, that is, the door panel 4 is in the fully closed state, an external force acts on the door panel 4 from the landing entrance side.

[0050] When a force exceeding a certain value is applied to the door panel 4 from the landing entrance side, the upper portion of the door panel 4 first tilts toward the hoistway. As the upper portion 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, if the upper portion of the door panel 4 tilts toward the hoistway, the lower end of the guide portion 12a abuts the side surface 11b of the engaging groove 11 on the landing entrance side.

[0051] After the lower end of the guide portion 12a abuts the side portion 11b on the landing entrance and exit side of the engaging groove 11, when the upper portion of the door panel 4 further tilts toward the shaft side, the guide portion 12a is pressed while abutting against the side portion 11b, thereby restricting the accessory 12 from being hooked on the engaging groove 11.

[0052] At this time, when an external force is further applied to move the door panel 4 upward, the guide portion 12a of the limiting accessory 12 is hooked on the side portion 11b, and the upper end of the through hole 12c abuts against the sliding mechanism 13a, thereby preventing the door panel 4 from moving upward using the limiting accessory 12.

[0053] Thus, when an external force exceeding a certain level acts on the door panel 4 from the landing entrance side, the restriction fitting 12 blocks the upward movement of the door panel 4, thereby preventing the door panel 4 from falling out of the sill groove 10a.

[0054] As described above, according to embodiment 1, the following elevator door device can be realized, which comprises: a door panel 4 that moves horizontally to open and close the entrance and exit; a guide body 9 that is mounted on the lower end of the door panel 4; a sill 10 that is arranged on the floor portion of the entrance and exit, and is provided with a sill groove 10a for inserting the guide body 9 on the upper surface; an engaging groove 11 that is formed with a bottom 10b in the sill groove 10a and is provided just below the approximately middle position in the horizontal width direction of the door panel 4 when fully closed, and has a depth lower than that of the bottom 10b; an inclined surface 11a that is provided in the engaging groove 11, and the depth direction gradually becomes shallower along the opening and closing direction of the door panel 4 toward the door opening direction of the door panel 4; a limiting accessory 12 that is arranged on the door At the lower end of the plate 4 and approximately in the middle of the horizontal width direction, a through hole 12c is formed in the upper part in a shape extending in the up-down direction, and a guide portion 12a is formed in the lower part which can abut against the bottom 10b or the inclined surface 11a and guide the abutting surface when abutted. When an external force acts on the door panel 4 when it is fully closed, the limiting accessory 12 engages with the engaging groove 10 to limit the upward movement of the door panel 4; and sliding mechanisms 13a, 13b are configured to engage with the through hole 12c, guide the limiting accessory 12 in a manner that can be shifted in the up-down direction and support it on the lower end of the door panel 4, thereby not making the overall depth of the sill groove 10a deeper than the previous structure, and can prevent the door panel 4 from falling out due to external force.

[0055] Furthermore, the depth of the engagement groove 11 is at least long enough to allow the restriction fitting 12 to be displaced in the vertical direction along the sliding mechanisms 13a and 13b. This allows the engagement groove 11 to be deeper than in Embodiment 1. For example, the engagement groove 11 is formed so as to gradually deepen from the bottom 10b of the sill groove 10 toward the bottom, penetrating the sill 10. This allows garbage and the like to be discharged outward from the engagement groove 11, making it less likely for garbage and the like to accumulate in the engagement groove 11.

[0056] Implementation method 2.

[0057] Figure 9 This is a front view showing the main parts of the elevator door device according to Embodiment 2 of the present invention when the door is fully closed. Figure 10This is the second embodiment of the present invention Figure 9 Side view of the door mechanism of an elevator. Figure 11 This is a front view showing the main parts of the elevator door device according to Embodiment 2 of the present invention when the door is fully opened. Figure 12 This is the second embodiment of the present invention Figure 11 Side view of the door mechanism of an elevator.

[0058] In the figure, the door device of the elevator according to the second embodiment of the present invention is described. The guide portion 12a of the door device of the elevator according to the second embodiment of the present invention has a roller 12d that continuously abuts against the bottom 10b and the inclined surface 11a, and the sliding mechanisms 13a and 13b have a spring 13c that applies force to the limiting accessory 12 downward. The same numbers are marked on the other identical parts and the description is omitted.

[0059] In the first embodiment, the guide portion 12a makes line contact with the bottom 10b and the slope 11a due to the pointed tip of the slope 12b. Therefore, the contact may not be smooth depending on the angle or surface condition of the contact with the bottom 10b and the slope 11a.

[0060] Therefore, a roller 12d is provided at the lower end of the restriction fitting 12 in Embodiment 2 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 contacting the bottom portion 10b and the inclined surface 11a.

[0061] Furthermore, the sliding mechanisms 13a and 13b are provided with a spring 13c that urges the restriction fitting 12 downward. The spring 13c constantly urges the restriction fitting 12 downward so that the guide portion 12a contacts the bottom portion 10b and the inclined surface 11a.

[0062] Then, in Figures 11 and 12 10b, the operation of the restricting member 12 in the normal state (the state from when the door panel 4 is fully open to just before it is fully closed) will be described. First, when the door panel 4 is in the state from when it is fully open to just before it is fully closed, the restricting member 12 moves in accordance with the opening and closing movement of the door panel 4 while the roller 12d contacts the bottom 10b.

[0063] At this time, the restriction fitting 12 is supported by the slide mechanisms 13a and 13b while being biased downward by the spring 13c, and is arranged at a position where the lower end of the roller 12d contacts the bottom portion 10b.

[0064] Then, in Figures 9 and 10, the transition of the restricting fitting 12 from the normal state to the action-ready state (the state in which the restricting fitting 12 is engaged with the engagement groove 11) is described. As the door panel 4 closes from just before it is fully closed to the fully closed state, the lower end of the roller 12d continuously abuts from the bottom 10b to the inclined surface 11a, and the roller 12d is guided by the inclined surface 11a, causing the restricting fitting 12 to begin to descend.

[0065] When the door panel 4 is fully closed, the limiting fitting 12 is supported by the sliding mechanisms 13a and 13b and is urged downward by the spring 13c while descending along the inclined surface 11a, thereby being configured to engage with the engagement groove 11. At this time, the limiting fitting 12 is always urged downward by the spring 13c, and is therefore stably configured to engage with the engagement groove 11 regardless of the angle or surface condition when it contacts the inclined surface 11a.

[0066] When the limiting accessory 12 is engaged in the engaging groove 11 and external force acts on the door panel 4 in the action preparation state, the roller 12d of the limiting accessory 12 is hooked on the side portion 11b, and the upper end of the through hole 12c abuts against the sliding mechanism 13a, thereby preventing the door panel 4 from moving upward by utilizing the limiting accessory 12.

[0067] As described above, according to the second embodiment, the guide portion 12a includes the roller 12d that continuously contacts the bottom portion 10b and the inclined surface 11a. Therefore, when the door panel 4 is opened or closed, the roller 12d contacts the bottom portion 10b and the inclined surface 11a and rotates. As a result, the restriction fitting 12 is stably positioned on the bottom portion 10b, regardless of the angle or surface condition at which the roller 12d contacts the bottom portion 10b and the inclined surface 11a, and is stably positioned so as to be able to engage with the engagement groove 11.

[0068] Furthermore, as described above, according to Embodiment 2, the sliding mechanisms 13a and 13b include the spring 13c that biases the restricting fitting 12 downward. Therefore, when the door panel 4 is opened or closed, the restricting fitting 12 is constantly biased toward the bottom 10b and the inclined surface 11a by the spring 13c. Consequently, the restricting fitting 12 is stably positioned on the bottom 10b, regardless of the angle or surface conditions at which the restricting fitting 12 and the roller 12d abut against the bottom 10b and the inclined surface 11a, and is stably positioned so as to be able to engage with the engaging groove 11.

[0069] In addition, in Embodiment 2, both the roller 12d and the spring 13c are provided, but only one of them may be provided. Even when either one is provided, it is of course possible to achieve the same operation and effect as in Embodiment 2.

[0070] Industrial applicability

[0071] The present invention relates to an elevator door device having a sill provided at a floor portion of an elevator entrance.

Claims

1. An elevator door device, characterized in that: have: Door panels that move horizontally to open and close the entrance and exit; a guide body mounted on the lower end portion of the door panel; a sill, which is provided on the floor portion of the entrance and exit and has a sill groove on its upper surface for the guide to be inserted into; a locking groove formed at the bottom of the sill groove, disposed directly below a substantially middle position in the width direction of the door panel when the door panel is fully closed, and having a depth lower than that of the bottom; An inclined surface is provided in the engaging groove, and its depth direction gradually becomes shallower along the opening and closing direction of the door panel toward the door opening direction of the door panel; a limiting accessory disposed at a lower end portion of the door panel and approximately in the middle of the width direction, having a through hole formed in an upper portion thereof and extending in an up-down direction, and a guide portion formed in a lower portion thereof which can abut against the bottom portion or the inclined surface and guide the abutting surface when abutted, wherein when an external force acts on the door panel when fully closed, the limiting accessory engages with the engaging groove to restrict upward movement of the door panel; as well as The sliding mechanism is provided to engage with the through hole, guides the restricting fitting so as to be displaceable in the vertical direction, and is supported on the lower end portion of the door panel.

2. The door device of an elevator according to claim 1, characterized in that The depth of the engagement groove has at least a length sufficient for the restriction fitting to be displaced in the vertical direction along the sliding mechanism.

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

4. The door device of an elevator according to claim 1 or 3, characterized in that: The sliding mechanism includes an elastic body that urges the restriction fitting downward.

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