Movement range restriction bracket and elevator

Abstract

To provide a moving range restricting bracket that can restrict the moving range of a safety hook and facilitate attachment work even to a handrail of an existing elevator, and an elevator.SOLUTION: A moving range restricting bracket 10 has a first engagement portion 11, a second engagement portion 12, and a connecting portion 13. The first engagement portion 11 is detachably engaged with an upper sash bar 7. The second engagement portion 12 is detachably engaged with a pillar 6. The connecting portion 13 connects the first engagement portion 11 and the second engagement portion 12, and forms a closed space together with the upper sash bar 7 and the pillar 6. A safety hook 100 is connected to the sash bar in the closed space formed by the connecting portion 13, the upper sash bar 7 and the pillar 6.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a movement range limiting bracket and an elevator. [Background technology]

[0002] Conventionally, when performing maintenance and inspection of elevators, workers may work on the ceiling, which is the upper part of the car that moves up and down in the hoistway. For this reason, handrails are installed on the ceiling of the car to ensure the safety of workers. The safety of workers is ensured by connecting a safety hook fixed to the worker's belt or the like to the handrail.

[0003] One example of a technique for connecting this safety hook is described in Patent Document 1. Patent Document 1 describes a technique that includes a handrail frame erected on the top of the car so as to surround all four sides, a handrail rail that is provided continuously from the top of the handrail frame and formed endlessly so as to surround all four sides, a guide that is provided on the handrail rail and is movable along the endless handrail rail, and a safety hook connecting means that is provided on the guide and allows an operator on the car to connect a safety hook. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2008 / 136118 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the technology described in Patent Document 1, if the safety hook moves to the middle of the handrail rail, an excessive load is applied to the handrail rail, so the handrail needs to be made strong. Therefore, the movable range of the safety hook needs to be limited to the vicinity of the handrail post.

[0006] Furthermore, with the technology described in Patent Document 1, in order to connect the safety hook, it was necessary to install the handrail rail, guide, and safety hook connecting means on the handrail in advance, making it difficult to install in existing elevators.

[0007] Taking the above problems into consideration, the present object is to provide a movement range restriction bracket and elevator that can limit the movement range of a safety hook and can also be easily attached to an existing elevator handrail. [Means for solving the problem]

[0008] In order to solve the above problems and achieve this object, the movement range restriction bracket is detachably attached to a handrail installed at the top of an elevator car. The movement range restriction bracket has a first engagement portion, a second engagement portion, and a connecting portion. The first engagement portion detachably engages with a rail of the handrail. The second engagement portion detachably engages with a support post of the handrail that stands upright from the top of the car. The connecting portion connects the first engagement portion and the second engagement portion, and forms a closed space together with the rail and the support post. The safety hook is connected to the rail in the closed space formed by the connecting portion, the rail, and the support post.

[0009] In addition, the above-mentioned movement range restriction bracket is removably attached to the elevator. Effect of the Invention

[0010] According to the movement range restriction bracket and elevator of the above configuration, the movement range of the safety hook can be restricted, and the installation work can be easily performed on the handrail of an existing elevator. [Brief description of the drawings]

[0011] [Figure 1] 1 is a perspective view showing an upper portion of an elevator car according to an embodiment of the present invention; [Diagram 2]2A is an enlarged perspective view of range A shown in FIG. 1, FIG. 2B is a view of FIG. 2A seen from viewpoint B, and FIG. 2C is a view of FIG. 2A seen from viewpoint C. [Diagram 3] 2A is a perspective view of the range A shown in FIG. 1, as viewed from a different direction than in FIG. 2A. [Figure 4] FIG. 2 is a perspective view showing a movement range restricting bracket according to the embodiment. [Diagram 5] 5A to 5C are diagrams showing a method of attaching a movement range restricting bracket according to an embodiment. [Figure 6] 6A and 6B are diagrams showing a method of attaching a movement range restricting bracket according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A movement range restricting bracket and an elevator according to an embodiment will be described below with reference to Figures 1 to 6B. Note that the same reference numerals are used to refer to common members in each figure.

[0013] 1. Example of embodiment 1-1. Elevator configuration First, the configuration of an elevator according to an embodiment (hereinafter, referred to as "this example") will be described with reference to FIG. FIG. 1 is a perspective view showing the upper part of the elevator car of this embodiment.

[0014] The elevator 1 of this example has a car 2 that moves up and down in a hoistway formed in a building structure and carries people and luggage. A handrail 4 for upper work is installed on a ceiling part 3, which is the upper part of the car 2 in the vertical direction.

[0015] The handrail 4 has multiple support posts 6, an upper rail 7, and a middle rail 8. The support posts 6 are formed in a generally cylindrical shape. The support posts 6 are arranged at the four corners of the ceiling part 3 of the car 2. The support posts 6 stand upright from the ceiling part 3 facing upward in the vertical direction. The support posts 6 may be installed on the ceiling part 3 in a foldable manner.

[0016] An upper rail 7 is installed at the top end of the support 6 in the vertical direction. The upper rail 7 is arranged parallel to the outer periphery of the ceiling part 3 of the car 2, and connects two adjacent support columns 6. A middle rail 8 is installed at the middle part of the support 6 in the vertical direction. Like the upper rail 7, the middle rail 8 is arranged parallel to the outer periphery of the ceiling part 3 of the car 2, and connects two adjacent support columns 6. The upper rail 7 and the middle rail 8 are formed in a substantially rectangular prism shape. Here, the inside of the horizontal space surrounded by the upper rail 7 and the middle rail 8, i.e., the inside of the handrail 4, and the outside of the horizontal space surrounded by the upper rail 7 and the middle rail 8, i.e., the outside of the outer periphery of the ceiling part 3 of the car 2, is referred to as the outside of the handrail 4.

[0017] Although an example has been described in which the post 6 is formed into a generally cylindrical shape, and the upper crosspiece 7 and the middle crosspiece 8 are formed into a generally rectangular crosspiece, the present invention is not limited to this. For example, the post 6 may be formed into a generally rectangular crosspiece, and the upper crosspiece 7 and the middle crosspiece 8 may be formed into a generally cylindrical shape. Also, although an example has been described in which two crosspieces, the upper crosspiece 7 and the middle crosspiece 8, are provided on the handrail 4, the present invention is not limited to this, and three or more crosspieces may be provided.

[0018] In addition, a movement range restriction bracket 10 is attached to the corner where the support post 6 and the upper rail 7 of the handrail 4 are connected.

[0019] 1-2. Example of movement range restriction bracket configuration Next, the movement range limiting bracket 10 will be described with reference to FIGS. 2A to 4. FIG. Fig. 2A is an enlarged perspective view of range A shown in Fig. 1, Fig. 2B is a view of Fig. 2A from viewpoint B, and Fig. 2C is a view of Fig. 2A from viewpoint C. Fig. 3 is a perspective view of range A shown in Fig. 1 from a different direction than Fig. 2A. Fig. 4 is a perspective view showing the movement range limiting bracket 10.

[0020] 2A to 4, the movement range limiting bracket 10 has a first engagement portion 11, a second engagement portion 12, and a connecting portion 13. In addition, as shown in FIGS. 2A to 3, the movement range limiting bracket 10 has a jack bolt 15 and a nut 16.

[0021] As shown in FIG. 4, the first engagement portion 11 is formed at one end of the connecting portion 13 in the longitudinal direction. The first engagement portion 11 is formed in a substantially U-shape to match the shape of the upper rail 7. The first engagement portion 11 has a first surface portion 17, a second surface portion 18, and a third surface portion 19. The first surface portion 17, the second surface portion 18, and the third surface portion 19 are formed in a substantially flat plate shape. The first surface portion 17 and the second surface portion 18 are substantially parallel to the horizontal direction, and the third surface portion 19 is substantially parallel to the up-down direction perpendicular to the horizontal direction. The second surface portion 18 is located above the first surface portion 17 in the up-down direction, and the first surface portion 17 and the second surface portion 18 face each other with a gap therebetween in the up-down direction.

[0022] A through hole 17a through which the jack bolt 15 is inserted is formed in the first surface portion 17. A nut 16 (see Figs. 2C and 3) is disposed on one surface of the first surface portion 17 facing the second surface portion 18. The nut 16 is disposed at a position on the first surface portion 17 where the through hole 17a is provided. The nut 16 may be fixed to the first surface portion 17 in advance by welding.

[0023] A third surface portion 19 is connected substantially perpendicularly to one end of the first surface portion 17. The third surface portion 19 is connected to one end of the second surface portion 18. One end sides of the first surface portion 17 and the second surface portion 18 in the first engagement portion 11 are closed by the third surface portion 19, and the other end sides of the first surface portion 17 and the second surface portion 18 are open.

[0024] 2A to 3, the first engagement portion 11 is detachably engaged with the upper rail 7 from the inside of the handrail 4. The first engagement portion 11 is held to the upper rail 7 by a jack bolt 15 and a nut 16. Although an example in which the first engagement portion 11 is attached to the upper rail 7 has been described, the present invention is not limited to this, and the first engagement portion 11 may be attached to the middle rail 8.

[0025] Also, although an example has been described in which the first engagement portion 11 is formed into a substantially U-shape to match the shape of the upper rail 7, the present invention is not limited to this. For example, if the upper rail 7 is formed into a substantially cylindrical shape, the first engagement portion 11 may be formed into a shape in which a part of a cylinder is cut out, that is, into a substantially C-shape, or may be any other shape as long as it can engage with the rail of the handrail 4.

[0026] As shown in FIG. 4, one end of the connecting portion 13 in the longitudinal direction is connected to the other end of the first surface portion 17 of the first engagement portion 11. The connecting portion 13 is formed in a substantially flat plate shape. Since the connecting portion 13 is formed in a flat plate shape, the strength of the connecting portion 13 appears to be lower than the strength of the support 6 and the upper rail 7. Note that the strength of the connecting portion 13 is actually lower than the strength of the support 6 and the upper rail 7. The connecting portion 13 extends obliquely downward in the vertical direction from the first surface portion 17. A second engaging portion 12 is formed at the other end of the connecting portion 13 in the longitudinal direction, i.e., at the lower part in the vertical direction.

[0027] The second engagement portion 12 is bent substantially vertically in the horizontal direction from the other end of the connecting portion 13. The second engagement portion 12 is formed substantially in a flat plate shape, and the surface is disposed substantially parallel to the up-down direction. The direction in which the surface of the second engagement portion 12 faces is different from the direction in which the third surface portion 19 of the first engagement portion 11 faces.

[0028] In addition, the second engagement portion 12 may be formed in a shape with part of a cylinder cut out, i.e., in an approximately C-shape, to match the shape of the approximately cylindrical support 6, and the shape of the second engagement portion 12 may be any other shape as long as it can engage with the support of the handrail 4.

[0029] 2A to 3, the second engagement portion 12 is detachably engaged with the post 6 from the outside of the handrail 4. The closed surfaces of the first engagement portion 11 and the second engagement portion 12 face in different directions. Therefore, the movement range restricting bracket 10 is attached to the handrail 4 by sandwiching the handrail 4 between the first engagement portion 11 and the second engagement portion 12. This makes it possible to prevent the movement range restricting bracket 10 from coming off the handrail 4.

[0030] By attaching the movement range restricting bracket 10 to the handrail 4, the connecting portion 13 of the movement range restricting bracket 10 is arranged to connect the support post 6 and the upper rail 7 of the handrail 4 at an angle. Then, as shown in FIG. 2B, a closed space Q1 is formed surrounded by the connecting portion 13, the support post 6, and the upper rail 7. Then, as shown in FIG. 2A, the worker connects the safety hook 100 to the upper rail 7 in the closed space Q1 surrounded by the connecting portion 13, the support post 6, and the upper rail 7. In this way, the safety hook 100 is attached not to the middle part of the upper rail 7, but near the support post 6, which is stronger than the middle part. This ensures strength in the event that the worker falls from the car 2, and eliminates the need to form the upper rail 7 of the handrail 4 to be strong.

[0031] Here, the safety hook 100 has a lower strength when connected in the horizontal direction than in the vertical direction. When the safety hook 100 is attached to the support 6 in the closed space Q1, the safety hook 100 is connected to the handrail 4 in the horizontal direction, which is relatively weak in strength. In contrast, the movement range regulating bracket 10 of this example does not have a jack bolt 15 or a nut 16 provided in the second engagement portion 12, unlike the first engagement portion 11. Therefore, the vicinity of the second engagement portion 12 appears to the worker to be weaker in strength than the first engagement portion 11 and the upper rail 7. This makes it possible to encourage the worker to connect the safety hook 100 to the upper rail 7 side in the closed space Q1, i.e., in the vertical direction.

[0032] Furthermore, the connecting portion 13 appears to have less strength than the support pillar 6 and the upper rail 7. Therefore, to the worker, the connecting portion 13 appears to have less strength than the support pillar 6 and the upper rail 7. This makes it possible to urge the worker to accurately attach the safety hook 100 to the upper rail 7, which has higher strength, rather than to the connecting portion 13, which has lower strength. In this way, the movement range limiting bracket 10 of this example makes it possible to urge the worker to connect the safety hook 100 in the correct direction and position, thereby preventing the worker from making a mistake in how to connect the safety hook 100.

[0033] Furthermore, when the safety hook 100 moves in a direction away from the support 6, the safety hook 100 abuts against the movement range limiting bracket 10. This makes it possible to limit the movement range of the safety hook 100 to the vicinity of the support 6, which has high strength; in other words, it is possible to limit movement to the middle part of the upper rail 7, which has relatively low strength, thereby improving work safety. Furthermore, the horizontal load applied to the movement range limiting bracket 10 is transmitted to the support 6 via the second engagement part 12 of the movement range limiting bracket 10. Therefore, the safety of the worker can be ensured even if the movement range limiting bracket 10 is not firmly attached to the handrail 4.

[0034] 1, the movement range restriction bracket 10 is attached between the two posts 6. As a result, even if the movement range restriction bracket 10 comes off the handrail 4, the safety hook 100 is positioned between the two posts 6, so that the safety hook 100 can be prevented from coming off the handrail 4.

[0035] 2. How to install the movement range restriction bracket 10 Next, a method for attaching the movement range restricting bracket 10 having the above-mentioned configuration will be described with reference to FIGS. 5A to 6B. 5A to 6B are explanatory diagrams showing a method for attaching the movement range limiting bracket 10. FIG.

[0036] 5A and 6A, the first engagement portion 11 is brought close from the inside of the handrail 4, and fitted into the upper rail 7 through an opening in the first engagement portion 11 that faces the third surface portion 19. At this time, the second surface portion 18 of the first engagement portion 11 faces the top surface portion of the upper rail 7 in the vertical direction, and the third surface portion 19 faces the inner surface portion of the upper rail 7 in the horizontal direction. Next, the movement range restriction bracket 10 is rotated to engage the second engagement portion 12 with the support post 6 from the outside of the handrail 4.

[0037] Next, as shown in Figures 5B and 6B, the second surface 18 of the first engagement portion 11 is overlapped with the upper surface of the upper rail 7 to engage the first engagement portion 11 with the upper rail 7. As a result, as shown in Figure 5C, the first surface 17 of the first engagement portion 11 faces the lower surface of the upper rail 7 in the vertical direction. Then, as shown in Figures 2C and 3, the first engagement portion 11 is fastened and fixed to the upper rail 7 using the jack bolt 15 and nut 16. This completes the installation work of the movement range limiting bracket 10.

[0038] Here, as described above, the load applied to the movement range limiting bracket 10 is transmitted to the support pillar 6, and no large load acts on the movement range limiting bracket 10. Furthermore, the movement range limiting bracket 10 has first engagement portion 11 and second engagement portion 12 that engage in different directions, and is attached so as to sandwich the handrail 4. This makes it possible to prevent the movement range limiting bracket 10 from coming off unintentionally by the worker, and there is no need to fasten the first engagement portion 11 to the upper rail 7 with the jack bolt 15 or nut 16.

[0039] Furthermore, by fastening with jack bolts 15 and nuts 16, the movement range restricting bracket 10 can be prevented from coming off the handrail 4 even when the handrail 4 is folded.

[0040] In this way, the movement range limiting bracket 10 of this example is attached to the handrail 4 by engagement of the first engagement portion 11 and the second engagement portion 12, without performing complicated work such as welding. As a result, the movement range limiting bracket 10 can be easily attached.

[0041] Furthermore, the movement range restriction bracket 10 can be attached without processing the handrail 4. Therefore, the movement range restriction bracket 10 can be attached to the handrail of an existing elevator.

[0042] When removing the movement range limiting bracket 10 from the handrail 4, first remove the jack bolt 15 from the first engagement portion 11. Then, rotate the movement range limiting bracket 10 to release the engagement between the first engagement portion 11 and the second engagement portion 12. This allows the movement range limiting bracket 10 to be removed from the handrail 4. In this way, with the movement range limiting bracket 10 of this example, the removal work can be easily performed.

[0043] The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention described in the claims.

[0044] In the above-described embodiment, the first engagement portion 11 engages with the handrail 4 from the inside, and the second engagement portion 12 engages with the handrail 4 from the outside, but the present invention is not limited to this. For example, the first engagement portion 11 may engage with the handrail 4 from the outside, and the second engagement portion 12 may engage with the handrail 4 from the inside. When the first engagement portion 11 engages with the handrail 4 from the outside, the connecting portion 13 is disposed on the inside of the handrail 4 relative to the first surface portion 17 of the first engagement portion 11. Therefore, when inserting the jack bolt 15 into the through hole 17a of the first surface portion 17, the operator's hand is hidden by the connecting portion 13. Therefore, it is preferable that the first engagement portion 11 engages with the handrail 4 from the inside.

[0045] Also, the first engagement portion 11 and the second engagement portion 12 may be engaged in the same direction. This makes the installation work easier. However, from the viewpoint of preventing the movement range regulating bracket 10 from falling off, it is preferable that the first engagement portion 11 and the second engagement portion 12 engage with the handrail 4 in different directions.

[0046] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but may also mean a "substantially parallel" or "substantially orthogonal" state that includes "parallel" and "orthogonal" and is within a range in which the respective functions can be exerted. [Explanation of symbols]

[0047] 1...Elevator, 2...Car, 3...Ceiling, 4...Handrail, 6...Support, 7...Upper rail (rail), 8...Middle rail, 10...Movement range restriction bracket, 11...First engagement part, 12...Second engagement part, 13...Connecting part, 15...Jack bolt, 16...Nut, 17...First surface, 17a...Through hole, 18...Second surface, 19...Third surface, 100...Safety hook, Q1...Closed space

Claims

1. A movement range regulating bracket that is detachably attached to a handrail installed at the top of an elevator car, A first engagement portion that detachably engages with the rail of the handrail; A second engagement portion that detachably engages with a support post of the handrail that stands upright from an upper portion of the car; a connecting portion that connects the first engaging portion and the second engaging portion and forms a closed space together with the crosspiece and the support column, The safety hook is connected to the crosspiece in the closed space formed by the connecting portion, the crosspiece, and the support. Movement range limiting bracket.

2. The first engaging portion engages with the crosspiece in a direction different from the direction in which the second engaging portion engages with the support post. The movement range limiting bracket according to claim 1 .

3. The first engagement portion engages with the rail from an inside of the handrail, The second engagement portion engages with the post from the outside of the handrail. The movement range limiting bracket according to claim 2 .

4. A jack bolt is provided to fasten the first engagement portion to the crosspiece. The movement range limiting bracket according to claim 1 .

5. The strength of the connecting portion is set lower than the strength of the crosspiece and the support column. The movement range limiting bracket according to claim 1 .

6. a car that moves up and down within a hoistway formed within a building structure; A handrail installed on an upper portion of the car; A movement range limiting bracket that is detachably attached to the handrail, The movement range limiting bracket is A first engagement portion that detachably engages with the rail of the handrail; A second engagement portion that detachably engages with a support post of the handrail that stands upright from an upper portion of the car; a connecting portion that connects the first engaging portion and the second engaging portion and forms a closed space together with the crosspiece and the support column, The safety hook is connected to the crosspiece in the closed space formed by the connecting portion, the crosspiece, and the support. Elevator.

7. The pillars are disposed at the four corners of the upper portion of the car, The crosspiece connects the support posts arranged at the four corners, The movement range limiting bracket is disposed between the two support columns.

7. The elevator according to claim 6.

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