Moving range limiting support and elevator

Abstract

The present invention provides a movement range restriction bracket and an elevator, which can restrict the movement range of a safety hook and easily perform installation work even on an existing elevator handrail. The movement range restriction bracket (10) of the present invention includes a first engaging portion (11), a second engaging portion (12), and a linking portion (13). The first engaging portion (11) is detachably engaged with an upper crosspiece (7). The second engaging portion (12) is detachably engaged with a stanchion (6). The linking portion (13) links the first engaging portion (11) and the second engaging portion (12) and forms a closed space together with the upper crosspiece (7) and the stanchion (6). Furthermore, a safety hook (100) is linked to a crosspiece of the closed space formed by the linking portion (13), the upper crosspiece (7), and the stanchion (6).

Description

TECHNICAL FIELD

[0001] The present application relates to a moving range restriction support and an elevator. BACKGROUND

[0002] Conventionally, when maintenance inspection and work are performed on an elevator, a worker sometimes performs work while sitting on a car roof portion that is the top of a car that is raised and lowered in a shaft during maintenance inspection and the like. Therefore, a handrail is provided on the car roof portion of the car to ensure the safety of the worker. Also, a safety hook that is fixed to a safety belt or the like of the worker is linked to the handrail to ensure the safety of the worker.

[0003] As a technique for linking the safety hook, for example, there is the technique described in Patent Literature 1. Patent Literature 1 describes a technique that includes a handrail frame that is vertically erected in a square manner on an upper portion of a car, a handrail track that is continuously provided on an upper portion of the handrail frame and is formed in a ring shape to surround the square, a guide rail that is provided on the handrail track and freely moves along the ring-shaped handrail track, and a safety hook linking unit that is provided on the guide rail and links a safety hook of a worker on the car.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: International Publication No. 2008 / 136118 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] However, in the technique described in Patent Literature 1, when the safety hook moves to a middle portion of the handrail track, an excessive load is applied to the handrail track, and thus the handrail needs to be firmly formed. Therefore, it is required that the movable range of the safety hook be restricted to the vicinity of a support of the handrail.

[0009] Also, in the technique described in Patent Literature 1, in order to link the safety hook, the handrail track, the guide rail, and the safety hook linking unit need to be provided in advance on the handrail, and it is difficult to provide them on an existing elevator.

[0010] In view of the above problems, an object of the present application is to provide a moving range restriction support and an elevator that can restrict the movable range of a safety hook and can easily perform installation work on an existing elevator handrail.

[0011] MEANS FOR SOLVING THE PROBLEMS

[0012] To solve the above problems and achieve the object, a movement range limiting bracket is detachably installed on a handrail provided at an upper portion of a car of an elevator. The movement range limiting bracket includes a first engaging portion, a second engaging portion, and a linking portion. The first engaging portion is detachably engaged with a rung of the handrail. The second engaging portion is detachably engaged with a stanchion of the handrail vertically provided from the upper portion of the car. The linking portion links the first engaging portion and the second engaging portion, and forms a closed space together with the rung and the stanchion. Also, a safety hook is linked to the rung of the closed space formed by the linking portion, the rung, and the stanchion.

[0013] Further, in the elevator, the above movement range limiting bracket is detachably installed.

[0014] Effects of Invention

[0015] According to the movement range limiting bracket and the elevator having the above structure, the movement range of the safety hook can be limited, and installation work can be easily performed on the existing elevator handrail. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view showing an upper portion of a car of an elevator according to an embodiment example.

[0017] Figure 2 In the drawing: Figure 2 A is a perspective view showing a range A shown in Figure 1 is a perspective view showing a range A shown in Figure 2 B is a view of A as viewed from a B viewpoint. Figure 2 A. Figure 2 C is a view of A as viewed from a C viewpoint. Figure 2 A.

[0018] Figure 3 is a perspective view showing a range A shown in Figure 2 A from a different direction from Figure 1 A.

[0019] Figure 4 is a perspective view showing a movement range limiting bracket according to an embodiment example.

[0020] Figure 5 In the drawing: Figure 5 A to Figure 5 C are views showing a method of installing the movement range limiting bracket according to an embodiment example.

[0021] Figure 6 In the drawing: Figure 6 A to Figure 6 B are views showing a method of installing the movement range limiting bracket according to an embodiment example. DETAILED DESCRIPTION

[0022] Reference will now be made to Figures 1 to 6B illustrates a moving range restriction support and an elevator of the embodiment example. In addition, the same reference numerals are assigned to common members in each drawing.

[0023] 1. Embodiment Example 1-1. Structure of an elevator Figure 1 The structure of an elevator related to the embodiment example (hereinafter referred to as "the present example") will be described. Figure 1 FIG. 1 is a perspective view showing the upper portion of a car of the elevator of the present example.

[0024] The elevator 1 of the present example has a car 2 for carrying a person or a load that performs ascending and descending operations in a shaft formed in a building structure. A handrail 4 for an upper work is provided on a roof top 3 that is an upper portion in the up-and-down direction of the car 2.

[0025] The handrail 4 has a plurality of supports 6, an upper crosspiece 7, and a middle crosspiece 8. The support 6 is formed in a substantially cylindrical shape. The support 6 is disposed at four corners of the roof top 3 of the car 2. Also, the support 6 is vertically provided upward from the roof top 3 in the up-and-down direction. The support 6 can also be foldably provided on the roof top 3.

[0026] The upper crosspiece 7 is provided on the upper end portion in the up-and-down direction of the support 6. The upper crosspiece 7 is disposed in parallel to the outer periphery of the roof top 3 of the car 2 and links two adjacent supports 6. In addition, the middle crosspiece 8 is provided at the middle portion in the up-and-down direction of the support 6. Like the upper crosspiece 7, the middle crosspiece 8 is disposed in parallel to the outer periphery of the roof top 3 of the car 2 and links two adjacent supports 6. The upper crosspiece 7 and the middle crosspiece 8 are formed in a substantially quadrangular prism shape. Here, the inner side of the horizontal direction space surrounded by the upper crosspiece 7 and the middle crosspiece 8 is referred to as the inner side of the handrail 4, and the outer side of the horizontal direction space surrounded by the upper crosspiece 7 and the middle crosspiece 8, that is, the outer side of the outer periphery of the roof top 3 of the car 2 is referred to as the outer side of the handrail 4.

[0027] In addition, an example in which the support 6 is formed in a substantially cylindrical shape and the upper crosspiece 7 and the middle crosspiece 8 are formed in a substantially quadrangular prism shape is described, but is not limited thereto. For example, the support 6 can be formed in a substantially quadrangular prism shape, and the upper crosspiece 7 and the middle crosspiece 8 can be formed in a substantially cylindrical shape. In addition, as the crosspieces provided on the handrail 4, an example in which two crosspieces, the upper crosspiece 7 and the middle crosspiece 8, are provided is described, but is not limited thereto, and three or more crosspieces can be provided.

[0028] In addition, the moving range restriction support 10 is attached to the corner portion where the support 6 and the upper crosspiece 7 in the handrail 4 are connected.

[0029] 1-2. Structure example of a moving range restriction support Next, with reference to Figure 2 A to Figure 4 The moving range restriction support 10 will be described. Figure 2 A is an enlarged view showingFigure 1 perspective view of the range A shown, Figure 2 B is a view from the B viewpoint Figure 2 A, Figure 2 C is a view from the C viewpoint Figure 2 A. Figure 3 is a view from a direction different from Figure 2 A, Figure 1 perspective view of the range A shown. Figure 4 is a perspective view showing the movement range limiting bracket 10.

[0030] As Figure 2 A to Figure 4 shown, the movement range limiting bracket 10 has a first engaging portion 11, a second engaging portion 12, and a linking portion 13. Further, as Figure 2 A to Figure 3 shown, the movement range limiting bracket 10 has a jack bolt 15 and a nut 16.

[0031] As Figure 4 shown, the first engaging portion 11 is formed at one end portion in the longitudinal direction of the linking portion 13. The first engaging portion 11 is formed in a substantially U shape according to the shape of the upper crosspiece 7. The first engaging portion 11 has a first face portion 17, a second face portion 18, and a third face portion 19. The first face portion 17, the second face portion 18, and the third face portion 19 are formed in a substantially flat plate shape. The first face portion 17 and the second face portion 18 are substantially parallel to the horizontal direction, and the third face portion 19 is substantially parallel to the vertical direction orthogonal to the horizontal direction. The second face portion 18 is located above the first face portion 17 in the vertical direction, and the first face portion 17 and the second face portion 18 oppose each other with a space in the vertical direction.

[0032] In the first face portion 17, a through-hole 17a into which the jack bolt 15 is inserted is formed. The nut 16 (refer to Figure 2 C and Figure 3 ) is disposed on one face of the first face portion 17 opposite the second face portion 18. The nut 16 is disposed at a position in the first face portion 17 at which the through-hole 17a is provided. The nut 16 can be preliminarily fixed to the first face portion 17 by welding.

[0033] The third face portion 19 is connected to one end portion of the first face portion 17 substantially perpendicularly. The third face portion 19 is connected to one end portion of the second face portion 18. One end portion side of the first face portion 17 and the second face portion 18 of the first engaging portion 11 is closed by the third face portion 19, and the other end portion side of the first face portion 17 and the second face portion 18 is open.

[0034] As Figure 2 A to Figure 3As shown, the first engaging portion 11 is detachably engaged with the upper crossbar 7 from the inside of the handrail 4. Furthermore, the first engaging portion 11 is held in place on the upper crossbar 7 by a jack bolt 15 and a nut 16. Although an example of mounting the first engaging portion 11 on the upper crossbar 7 has been described, it is not limited to this; the first engaging portion 11 can also be mounted on the middle crossbar 8.

[0035] Furthermore, an example was given in which the first engaging portion 11 was formed in a roughly U-shape according to the shape of the upper crossbar 7, but it is not limited to this. For example, when the upper crossbar 7 is formed in a roughly cylindrical shape, the first engaging portion 11 can be formed in a shape in which a part of the cylinder is cut off, that is, in a roughly C-shape. As long as it is a shape that can engage with the crossbar of the armrest 4, it can be any other shape.

[0036] like Figure 4 As shown, one end of the connecting portion 13 in the long side direction is connected to the other end of the first face 17 in the first engaging portion 11. The connecting portion 13 is formed in a generally flat shape. Due to its flat shape, the strength of the connecting portion 13 appears to be lower than that of the support column 6 and the upper crossbar 7. In fact, the strength of the connecting portion 13 is indeed lower than that of the support column 6 and the upper crossbar 7. Furthermore, the connecting portion 13 extends obliquely downward from the first face 17 in the vertical direction. The second engaging portion 12 is formed at the other end of the connecting portion 13 in the long side direction, that is, the lower part in the vertical direction.

[0037] The second engaging portion 12 bends approximately perpendicular to the horizontal direction from the other end of the connecting portion 13. The second engaging portion 12 is formed in a generally flat shape, and the surface of the second engaging portion 12 is arranged approximately parallel to the vertical direction. The direction in which the surface of the second engaging portion 12 faces is different from the direction in which the third surface portion 19 of the first engaging portion 11 faces.

[0038] Alternatively, the second engaging portion 12 can be formed into a shape where a portion of the cylinder has been cut off, i.e., approximately C-shaped, depending on the shape of the roughly cylindrical support column 6. The shape of the second engaging portion 12 can be any other shape as long as it can engage with the support column of the handrail 4.

[0039] like Figure 2 A to Figure 3 As shown, the second engaging portion 12 is detachably engaged with the support column 6 from the outside of the handrail 4. The closed surfaces of the first engaging portion 11 and the second engaging portion 12 face different directions. Therefore, by clamping the handrail 4 with the first engaging portion 11 and the second engaging portion 12, the movement range limiting bracket 10 is installed onto the handrail 4. This prevents the movement range limiting bracket 10 from detaching from the handrail 4.

[0040] By installing the movement range limiting bracket 10 to the handrail 4, the linking portion 13 of the movement range limiting bracket 10 is configured to link the stanchion 6 and the upper rail 7 of the handrail 4 obliquely. Then, as shown in Figure 2 B, a closed space Ql surrounded by the linking portion 13, the stanchion 6, and the upper rail 7 is formed. Then, as shown in Figure 2 A, the worker links the safety hook 100 to the upper rail 7 of the closed space Ql surrounded by the linking portion 13, the stanchion 6, and the upper rail 7. Thereby, the safety hook 100 is not installed in the middle portion of the upper rail 7, but installed in the vicinity of the stanchion 6 which has higher strength than the middle portion. Thereby, the strength when the worker falls from the car 2 can be ensured, and the upper rail 7 of the handrail 4 does not need to be formed firmly.

[0041] Here, the strength of the safety hook 100 when linked in the lateral direction is lower than the strength when linked in the longitudinal direction. Also, in the case where the safety hook 100 is installed to the stanchion 6 of the closed space Ql, the safety hook 100 is linked to the handrail 4 in the lateral direction which is relatively weak in strength. In contrast to this, in the movement range limiting bracket 10 of the present example, the second engaging portion 12 is not provided with the jackscrew 15 and the nut 16 as in the first engaging portion 11. Therefore, the strength in the vicinity of the second engaging portion 12 is lower than the first engaging portion 11 and the upper rail 7 from the viewpoint of the worker. Thereby, the worker can be encouraged to link the safety hook 100 to the upper rail 7 side of the closed space Ql, that is, in the longitudinal direction.

[0042] Further, the linking portion 13 looks weaker in strength than the stanchion 6 and the upper rail 7. Therefore, the strength of the linking portion 13 is lower than the stanchion 6 and the upper rail 7 from the viewpoint of the worker. Thereby, the worker can be encouraged to install the safety hook 100 correctly on the upper rail 7 which is higher in strength, rather than the linking portion 13 which is lower in strength. Thereby, according to the movement range limiting bracket 10 of the present example, the worker can be encouraged to make the direction and position of the linked safety hook 100 into the correct direction and position, and the worker can be prevented from confusing the linking method of the safety hook 100.

[0043] Further, in the case where the safety hook 100 moves in the direction away from the stanchion 6, the safety hook 100 abuts against the movement range limiting bracket 10. Thereby, the movement range of the safety hook 100 can be limited in the vicinity of the stanchion 6 which is higher in strength, that is, movement to the middle portion of the upper rail 7 which is relatively lower in strength can be limited, and thus the safety of the work can be improved. Further, the load in the horizontal direction applied to the movement range limiting bracket 10 is transmitted to the stanchion 6 via the second engaging portion 12 of the movement range limiting bracket 10. Therefore, even if the movement range limiting bracket 10 is not installed firmly to the handrail 4, the safety of the worker can be ensured.

[0044] Further, as shown in Figure 1As shown, the movement range limiting bracket 10 is installed between the two stanchions 6. Thereby, even if the movement range limiting bracket 10 is detached from the handrail 4, since the safety hook 100 is located between the two stanchions 6, the safety hook 100 can be prevented from being detached from the handrail 4.

[0045] 2. Installation method of movement range limiting bracket 10 Next, referring to Figure 5 A to Figure 6 B, the installation method of the movement range limiting bracket 10 having the above structure will be described. Figure 5 A to Figure 6 B are explanatory diagrams showing the installation method of the movement range limiting bracket 10.

[0046] First, as shown in Figure 5 A and Figure 6 A, the first engaging portion 11 is caused to approach from the inner side of the handrail 4, and the first engaging portion 11 is inserted into the upper rail 7 from the opening portion in the first engaging portion 11 opposite the third face portion 19. At this time, the second face portion 18 of the first engaging portion 11 opposes the upper surface portion of the upper rail 7 in the vertical direction, and the third face portion 19 opposes the surface portion of the upper rail 7 on the inner side in the horizontal direction. Next, the movement range limiting bracket 10 is caused to rotate, and thereby the second engaging portion 12 is caused to engage with the stanchion 6 from the outer side of the handrail 4.

[0047] Next, as shown in Figure 5 B and Figure 6 B, the second face portion 18 of the first engaging portion 11 is caused to overlap the upper surface portion of the upper rail 7, and the first engaging portion 11 is caused to engage with the upper rail 7. Thereby, as shown in Figure 5 C, the first face portion 17 of the first engaging portion 11 opposes the lower surface portion of the upper rail 7 in the vertical direction. Then, as shown in Figure 2 C and Figure 3 , the first engaging portion 11 is fastened and fixed to the upper rail 7 using the jack bolt 15 and the nut 16. Thereby, the installation work of the movement range limiting bracket 10 is completed.

[0048] Here, as described above, the load applied to the movement range limiting bracket 10 is transmitted to the stanchion 6, and no large load acts on the movement range limiting bracket 10. Further, in the movement range limiting bracket 10, the engaging directions of the first engaging portion 11 and the second engaging portion 12 are different, and the movement range limiting bracket 10 is installed in a manner of sandwiching the handrail 4. Therefore, the movement range limiting bracket 10 can be inhibited from unexpectedly falling off by the worker, and the first engaging portion 11 can be fastened and fixed to the upper rail 7 without the jack bolt 15 and the nut 16.

[0049] By the fastening and fixation using the jack bolt 15 and the nut 16, even in the case where the handrail 4 is folded, the movement range limiting bracket 10 can be prevented from being detached from the handrail 4.

[0050] Thus, the movement range limiting bracket 10 of the present embodiment is attached to the handrail 4 by the engagement of the first engagement portion 11 and the second engagement portion 12 without complicated work such as welding. As a result, the movement range limiting bracket 10 can be easily attached.

[0051] Further, the movement range limiting bracket 10 can be attached without processing the handrail 4. Thus, the movement range limiting bracket 10 can be attached to an existing elevator handrail.

[0052] In the case of detaching the movement range limiting bracket 10 from the handrail 4, first, the jack bolt 15 is detached from the first engagement portion 11. Then, the movement range limiting bracket 10 is rotated to release the engagement of the first engagement portion 11 and the second engagement portion 12. Thus, the movement range limiting bracket 10 is detached from the handrail 4. Thus, according to the movement range limiting bracket 10 of the present embodiment, the detachment work can be easily performed.

[0053] In addition, the present application is not limited to the embodiments described above and shown in the drawings, and various modifications can be made within the scope of the application recited in the patent claims.

[0054] In addition, in the above-described embodiment, an example in which the first engagement portion 11 engages with the handrail 4 from the inner side of the handrail 4 and the second engagement portion 12 engages from the outer side of the handrail 4 is described, but is not limited thereto. For example, the first engagement portion 11 can be made to engage from the outer side of the handrail 4 and the second engagement portion 12 can be made to engage from the inner side of the handrail 4. In the case of making the first engagement portion 11 engage from the outer side of the handrail 4, the link portion 13 is disposed more inward of the handrail 4 than the first face portion 17 of the first engagement portion 11. Thus, when the jack bolt 15 is inserted into the through-hole 17a of the first face portion 17, the hand of the worker is blocked by the link portion 13. Therefore, the first engagement portion 11 is preferably made to engage from the inner side of the handrail 4.

[0055] Further, the engagement directions of the first engagement portion 11 and the second engagement portion 12 can be the same direction. Thus, the attachment work can be more easily performed. However, from the viewpoint of preventing the movement range limiting bracket 10 from falling off, it is preferable that the engagement directions of the first engagement portion 11 and the second engagement portion 12 with the handrail 4 be made different directions.

[0056] Further, in the present specification, the words such as "parallel" and "orthogonal" do not mean only strict "parallel" and "orthogonal", but also include a state of "substantially parallel" and "substantially orthogonal" within a range in which the functions thereof can be exerted.

[0057] BRIEF DESCRIPTION OF THE DRAWINGS

[0058] 1 … elevator, 2 … car, 3 … car top, 4 … handrail, 6 … support post, 7 … upper crosspiece (crosspiece), 8 … middle crosspiece, 10 … movement range limiting bracket, 11 … first engaging portion, 12 … second engaging portion, 13 … connecting portion, 15 … jack bolt, 16 … nut, 17 … first face, 17a … through hole, 18 … second face, 19 … third face, 100 … safety hook, Q1 … enclosed space.

Claims

1. A movement range limiting bracket, detachably mounted on a handrail installed on the top of an elevator car, characterized in that, include: The first engaging portion is detachably engaged with the crossbar of the armrest; The second engaging portion is detachably engaged with the support column of the handrail that is vertically installed from the top of the car; as well as The connecting part connects the first engaging part and the second engaging part, forming a closed space together with the crossbar and the support column. The safety hook is connected to the crossbar in the enclosed space formed by the connecting part, the crossbar and the support.

2. The movement range limiting bracket as described in claim 1, characterized in that, The first engaging part engages with the crossbar in different directions, and the second engaging part engages with the support column in different directions.

3. The movement range limiting bracket as described in claim 2, characterized in that, The first engaging portion engages with the crossbar from the inside of the armrest. The second engaging portion engages with the support from the outside of the handrail.

4. The movement range limiting bracket as described in claim 1, characterized in that, It has a jack bolt for fastening the first engaging portion to the crossbar.

5. The movement range limiting bracket as described in claim 1, characterized in that, The strength of the connecting part is set to be lower than that of the crossbar and the support.

6. An elevator, characterized in that, include: A car that moves up and down within a shaft formed within a building structure; A handrail is provided on the top of the car; as well as A movement range limiting bracket, which is detachably mounted on the handrail. The movement range limiting bracket includes: The first engaging portion is detachably engaged with the crossbar of the armrest; A second engaging portion, which detachably engages with a support post of the handrail vertically disposed from the top of the car; and The connecting part connects the first engaging part and the second engaging part, forming a closed space together with the crossbar and the support column. The safety hook is connected to the crossbar in the enclosed space formed by the connecting part, the crossbar and the support.

7. The elevator as described in claim 6, characterized in that, The pillars are positioned at the four corners of the car's roof. The crossbars connect the pillars located at the four corners. The movement range limiting bracket is configured between the two pillars.

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