Threshold groove mounting hook for elevator

Abstract

To make it possible to easily put in and out a working tool used in a pit of an elevator from a landing to the pit during maintenance and inspection work of the elevator.SOLUTION: A sill groove mounting hook 1 for an elevator includes a sill groove fixing part 10 stored in a sill groove of an elevator landing, a connection member 20 connected to the sill groove fixing part 10 and extended from the sill groove fixing part 10, and a hook part 30 provided on an extended tip side of the connection member 20. When an elevator door is opened / closed, the sill groove fixing part 10 is arranged to be sunk in the sill groove 51 at a region where legs of the elevator door do not pass. The connection member 20 has a thickness smaller than a gap between a top surface of the sill and a lower edge of the elevator door. When the sill groove fixing part 10 is stored in the sill groove 51, the connection member abuts on a sill end part along the vertical direction and has a length with which the hook part 30 can be suspended up to a position where the hook part 30 does not come in contact with an elevator car.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a landing groove mounting hook for an elevator used during maintenance and inspection of an elevator.

Background Art

[0002] During maintenance and inspection of an elevator, it may be necessary to enter the pit to perform work. The pit is the space from the floor of the lowest floor in the hoistway to the bottom of the hoistway. To enter the pit, it is necessary to descend from the landing using a ladder or the like.

[0003] Patent Document 1 describes that when performing maintenance and inspection, one descends into the pit from the entrance using a ladder to perform work.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In conventional maintenance and inspection work, as shown in Fig. 10(a), a lifting rope 501 is attached to a working tool 500, the landing door (not shown) of the landing 200 is opened, and the working tool 500 is lowered from the landing 200 to the pit 400 using the lifting rope 501. Next, as shown in Fig. 10(b), the lifting rope 501 still connected to the working tool 500 is thrown into the pit 400, and the worker 100 descends into the pit 400 using a ladder to perform work.

[0006] When the work is completed, as shown in Fig. 11(a), a hoisting rope 501 is attached to the working tool 500. One end of the hoisting rope 501 is looped, passed through the arm, etc., and the operator 100 climbs the ladder 502 to open a landing door (not shown) of the landing 200. Next, as shown in Fig. 11(b), the operator exits the landing 200, reels in the hoisting rope 501, and hoists the working tool 500 into the landing 200.

[0007] As described above, for the maintenance and inspection work in the pit 400, it takes time to attach and remove the hoisting rope 501 to / from the working tool 500. When climbing up and down the ladder 502, it is necessary to prevent the hoisting rope 501 from getting caught on the equipment in the pit 400. Also, when working in the pit 400, the landing door must be closed, and the hoisting rope 501 cannot be fixed in the landing 200.

[0008] In the maintenance and inspection work of an elevator, it is desired that the working tools used in the elevator pit can be easily taken in and out of the pit from the landing.

[0009] An object of the present disclosure is to enable the working tools used in the elevator pit to be easily taken in and out of the pit from the landing in the maintenance and inspection work of the elevator.

Means for Solving the Problems

[0010] The threshold groove mounting hook for an elevator according to the present disclosure includes a threshold groove fixing portion that fits into the threshold groove of the elevator landing, a connecting member connected to the threshold groove fixing portion and extending from the threshold groove fixing portion, and a hook portion provided at the distal end side where the connecting member extends. The threshold groove fixing portion is sunk and disposed in the threshold groove in a region where the leg of the elevator door does not pass when the elevator door is opened and closed. The connecting member has a thickness smaller than the gap between the upper surface of the threshold and the lower end of the elevator door. When the threshold groove fixing portion is received in the threshold groove, it abuts vertically against the threshold end, and the hook portion has a length that suspends it to a position where it does not contact the elevator car.

Advantages of the Invention

[0011] According to the threshold groove mounting hook for an elevator according to the present disclosure, since the threshold groove mounting hook can be fixed to the threshold groove of the landing, the working tools can be easily taken in and out of the landing.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

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Figure 5

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Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying out the Invention

[0013] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following description, specific shapes, materials, directions, numerical values, etc. are examples for facilitating the understanding of the present disclosure and can be appropriately changed according to applications, purposes, specifications, etc. Also, it is initially assumed that the components of the embodiments and modification examples described below can be selectively combined.

[0014] (First Embodiment) FIG. 1 is a diagram showing the appearance of a threshold groove mounting hook 1 according to an embodiment of the present disclosure. The threshold groove mounting hook 1 has a threshold groove fixing portion 10, a connecting member 20, and a hook portion 30. The threshold groove mounting hook 1 is used to fix the threshold groove fixing portion 10 to a threshold groove and hook a working tool or the like on the hook portion 30. In the present embodiment, the threshold groove fixing portion 10 of the threshold groove mounting hook 1 has two fixing pieces 16.

[0015] The threshold groove fixing portion 10 is a portion to be housed in a threshold groove of a landing threshold (not shown). In FIG. 1, the threshold groove fixing portion 10 is a columnar fixing piece having an upper surface portion 11, a side surface portion 12, and a bottom surface portion 13. The diameter of the threshold groove fixing portion 10 is formed to be substantially equal to the width of the threshold groove so as to fit into the threshold groove and not easily come out. In order to prevent the upper surface portion 11 of the threshold groove fixing portion 10 from protruding from the threshold groove when housed in the threshold groove, the length of the side of the side surface portion 12 is formed shorter than the depth of the threshold groove. The threshold groove fixing portion 10 of the present embodiment has a cylindrical shape, but is not limited to a cylindrical shape and may be a polygonal columnar shape.

[0016] The threshold groove fixing portion 10 is preferably made of metal, but is not limited thereto. As long as it can withstand the load when a working tool is hooked on the hook portion 30 of the threshold groove mounting hook 1.

[0017] The connecting member 20 is a member that connects the threshold groove fixing portion 10 and the hook portion 30. In the present embodiment, the connecting member 20 and the hook portion 30 are formed from a single bent rod, and the hook portion 30 is formed by bending the substantially central portion of the connecting member 20. The thickness of the rod forming the connecting member 20 is formed smaller than the gap between the upper surface of the threshold (not shown) and the lower end of the elevator door, so that the connecting member 20 does not interfere with the door when the elevator door is closed. The threshold groove fixing portion 10 needs to be sunk and disposed in the threshold groove in a region where the legs of the elevator door do not pass when the elevator door is opened and closed. This will be described later.

[0018] The connecting member 20 has a fixing portion connecting portion 21 that is connected to the upper surface portion 11 of the threshold groove fixing portion 10. The connecting member 20 has an extending portion 22 in which the fixing portion connecting portion 21 extends slightly from the upper surface portion 11, is bent at a right angle, and extends to connect to the hook portion 30. The extending portion 22 is bent at a right angle and has a hook connecting portion 23 that connects to the hook portion 30. When the threshold groove fixing portion 10 is housed in the threshold groove, the hook connecting portion 23 abuts along the vertical direction against the edge of the landing threshold (threshold edge portion), and has a length that suspends the hook portion 30 to a position where it does not contact the elevator car.

[0019] In the present embodiment, the connecting member 20 extends from the two fixing pieces 16 that constitute the threshold groove fixing portion 10, and is connected by the hook portion 30 respectively. The extending portion 22 has a V shape that connects the two threshold groove fixing portions 10 and the hook portion 30.

[0020] The connecting member 20 is configured to extend along the upper surface of the threshold to the threshold edge portion, and to be able to arrange the threshold groove fixing portion 10 and the hook portion 30 in accordance with the interval even if the interval from the threshold groove to the threshold edge portion varies. As a result, when a working tool is hung on the hook portion 30, the load is transmitted to the threshold groove fixing portion 10, and it is always possible to arrange the threshold groove fixing portion 10 along the side surface of the threshold groove and always arrange the hook portion 30 to abut along the vertical direction against the threshold edge portion.

[0021] The hook portion 30 is a J-shaped portion connected to the connecting member 20. The hook portion 30 is used for attaching a lifting rope or directly hanging a working tool. The hook portion 30 has a hook straight portion 31 connected to the hook connecting portion 23 of the connecting member 20 and a hook tip portion 32 bent in a J shape. The connecting member 20 and the hook portion 30 are preferably formed of, for example, stainless steel so as to withstand the load of the working tool.

[0022] The hook straight portion 31 of the hook portion 30 is connected to the hook connecting portion 23. When the threshold groove attachment hook 1 is fixed to the threshold groove, the hook straight portion 31 is arranged to contact the threshold end portion along the vertically downward direction.

[0023] Next, FIG. 2 shows how the threshold groove attachment hook 1 of the present embodiment is attached to the threshold groove 51.

[0024] The connecting member 20 of the present embodiment is formed of a metallic rod. Compressive loads are applied from both sides so as to reduce the distance between the two extending portions 22 of the connecting member 20. The state of the threshold groove attachment hook 1 at this time is shown by the solid line in FIG. 2. The V shape formed by the two extending portions 22 becomes narrower, and the distance between the threshold groove fixing portion 10 and the hook portion 30 widens and becomes vertically long. While applying a load to maintain this state, the threshold groove fixing portion 10 is pushed into the threshold groove 51 until the connecting member 20 contacts the upper threshold surface 54. After that, when the force pressing the connecting member 20 is relaxed, the extending portions 22 move in the directions of A and A' respectively due to the restoring stress that tries to return to the original shape. At this time, since the threshold groove fixing portion 10 is fitted in the threshold groove 51, the movement of the threshold groove fixing portion 10 is restricted within the threshold groove 51, and the distance between the two threshold groove fixing portions 10 moves in the directions of B and B' respectively so as to widen. When the distance between the two threshold groove fixing portions 10 widens, the V shape of the two connecting members 20 deforms so as to widen accordingly, and in conjunction with this, the hook portion 30 moves in the direction of the threshold end portion 53 (direction C). And it moves until the hook straight portion 31 of the hook portion 30 contacts the threshold end portion 53. Finally, the threshold groove attachment hook 1 becomes the state shown by the broken line in FIG. 2, and the threshold groove attachment hook 1 is fixed to the landing threshold 50.

[0025] In the state of the broken line in FIG. 2, by forming it so that the restoring stress of the connecting member 20 is maintained, the hook portion 30 is pressed against the threshold end portion 53. Thus, the threshold groove mounting hook 1 can be fixed between the threshold groove 51 and the threshold end portion 53. Incidentally, the extending portion 22 may be configured to be rotatable with respect to the hook connecting portion 23 so that the hook connecting portion 23 and the hook portion 30 are configured to abut along the threshold end portion 53.

[0026] FIG. 3 shows a state in which the threshold groove mounting hook 1 of the embodiment is attached to the threshold groove 51. FIG. 3(a) is a view when the state in which the threshold groove mounting hook 1 is attached to the threshold groove 51 is viewed from the hoistway 300 (pit 400) side toward the landing 200. FIG. 3(b) is a view seen from above the landing 200. FIG. 3(c) is a right side view with a part in cross section. The landing 200 has a landing threshold 50, a threshold groove 51, a threshold groove side surface 52, a threshold end portion 53, and a threshold upper surface 54, and an elevator door (not shown) is installed.

[0027] As shown in FIGS. 3(a) to 3(c), since the hook portion 30 is disposed at the threshold end portion 53 on the pit 400 side, a pulling rope can be hooked on the hook portion 30 from the pit 400 side, and a working tool can be used in the pit 400. The connecting member 20 extends along the threshold upper surface 54 and is formed so that the connecting member 20 does not interfere with the door even when an elevator door (not shown) is closed.

[0028] As shown in Fig. 3(b), the threshold groove fixing part 10 of the threshold groove mounting hook 1 is housed in the threshold groove 51. The connecting member 20 extends upward from the threshold groove fixing part 10 housed in the threshold groove 51, bends at the threshold upper surface 54, and extends along the threshold upper surface 54 to the threshold end 53. At the threshold end 53, the hook connecting part 23 of the connecting member 20 is connected to the hook straight part 31, and the hook straight part 31 is in contact along the threshold end 53. As described above, due to the restoring force of the connecting member 20, the threshold groove mounting hook 1 is fixed to the threshold groove 51 in such a manner that the threshold groove side surface 52 and the threshold end 53 are sandwiched by the threshold groove fixing part 10 and the hook part 30 (hook straight part 31).

[0029] As shown in Fig. 3(c), the side surface part 12 of the threshold groove fixing part 10 is in contact with the threshold groove side surface 52, the hook straight part 31 of the hook part 30 is in contact with the threshold end 53, and the threshold groove fixing part 10 and the hook straight part 31 sandwich and fix the threshold groove side surface 52 and the threshold end 53. The hook connecting part 23 extends vertically downward at the threshold end 53, connects to the hook straight part 31, and suspends the hook part 30 to a position where it does not contact the elevator car.

[0030] Next, Fig. 4 will be used to explain the method of using the threshold groove mounting hook 1 of this embodiment. Fig. 4(a) shows the case where the depth of the pit 400 is about the height of the operator 100. In this case, after attaching the threshold groove mounting hook 1 to the threshold groove 51 of the landing 200, the working tool 500 can be directly hung on the hook part 30. When the depth of the pit 400 is deep and the hook part 30 is out of reach, as shown in Fig. 4(b), a pulling rope 501 is hooked on the hook part 30, the other end of the pulling rope 501 is tied to the working tool 500, and the pulling rope 501 is slowly let out to lower the working tool 500 gradually to the bottom of the pit 400 for use.

[0031] Next, the attachment position of the threshold groove attachment hook 1 to the threshold groove 51 will be described with reference to FIG. 5. FIGS. 5(a) and 5(b) show the two types of landing doors 60 of the elevator and the installation locations of the threshold groove attachment hook 1 corresponding to each type. As previously described, during work in the pit 400, the landing door 60 of the elevator must be closed. It is necessary to install the threshold groove attachment hook 1 so as not to interfere with the closed landing door 60 of the elevator.

[0032] FIG. 5(a) shows the installation location of the threshold groove attachment hook 1 in the case of the center-opening double-leaf door 61. Since the center-opening double-leaf door 61 opens the landing doors 60 from the center to both the left and right sides, the threshold groove attachment hook 1 is installed in the threshold groove 51 at the center of the left and right sides of the center-opening double-leaf door 61. By doing so, even when the landing door 60 is closed, it does not interfere with the leg 64 of the landing door 60, and the landing door 60 can be closed while the threshold groove attachment hook 1 is installed.

[0033] FIG. 5(b) shows the installation location of the threshold groove attachment hook 1 in the case of the single-opening double-leaf door 62. Since the single-opening double-leaf door 62 opens the landing door 60 in one direction, either the left or the right, the threshold groove attachment hook 1 is installed on the frontmost side in the direction in which the landing door 60 closes. By doing so, even when the landing door 60 is closed, it does not interfere with the leg 64 of the landing door 60, and the landing door 60 can be closed while the threshold groove attachment hook 1 is installed.

[0034] Next, the difference in the distance from the threshold groove 51 to the threshold end 53 according to the type of the landing door 60 of the elevator will be described with reference to FIGS. 6(a) and 6(b). The distance from the threshold groove side surface 52 on the hoistway 300 side of the threshold groove 51 to the threshold end 53 varies depending on the type of the landing door 60 of the center-opening double-leaf door 61 or the single-opening double-leaf door 62. Therefore, in order to correspond to all types of landing thresholds 50, the threshold groove attachment hook 1 is configured such that the threshold groove fixing portion 10 and the hook portion 30 can be arranged in accordance with the distance from the threshold groove 51 to the threshold end 53. As described above, in the present embodiment shown in FIGS. 1 and 2, the threshold groove fixing portion 10 and the hook portion 30 are configured to be arranged in accordance with the distance from the threshold groove 51 to the threshold end 53 by utilizing the restoring stress of the connecting member 20.

[0035] Next, FIG. 7 shows an example of the shape of the threshold groove fixing portion 10. FIG. 7(a) shows the case where the threshold groove fixing portion 10 has a cylindrical shape. In this case, the diameter of the threshold groove fixing portion 10 is formed slightly smaller than the width of the threshold groove 51. FIG. 7(b) shows the case where the threshold groove fixing portion 10 has a plate shape. The plate thickness of the threshold groove fixing portion 10 is formed slightly smaller than the width of the threshold groove 51. The longitudinal direction of the side surface portion 12 is made to coincide with the extending direction of the groove, and the short side direction of the side surface portion 12 is made to coincide with the depth direction of the groove.

[0036] As shown in FIG. 7, an anti-slip portion 15 is formed on the side surface portion 12 of the threshold groove fixing portion 10. The anti-slip portion 15 is formed by, for example, uneven grooves provided on the surface of the side surface portion 12. By providing the anti-slip portion 15, the threshold groove fixing portion 10 is caught by the side surface 52 of the threshold groove, making it difficult for the threshold groove fixing portion 10 to come out of the threshold groove 51. In the cylindrical shape shown in FIG. 7(a), it may be provided over the entire circumferential direction of the side surface portion 12 of the cylinder, or the anti-slip portion 15 may be provided only on a part of the opposite sides in the radial direction. In this case, the threshold groove fixing portion 10 is connected to the connecting member 20 so that the anti-slip portion 15 abuts on the threshold groove 51. In the plate shape shown in FIG. 7(b), the anti-slip portion 15 is provided only on both sides of the plate surface.

[0037] The anti-slip portion 15 may be formed by providing a plurality of protrusions on the surface of the side surface portion 12 instead of the uneven grooves. Also, as long as it has a function of preventing coming out by contacting the side surface 52 of the threshold groove 51, it is not particularly limited.

[0038] (Other Embodiments) FIG. 8 shows the threshold groove mounting hook 1 of another embodiment. For the parts having the same function as the threshold groove mounting hook 1 in FIG. 1, the same reference numerals as those in the embodiment of FIG. 1 are used for explanation.

[0039] The threshold groove fixing part 10 is plate-shaped. The side surface part 12 of the threshold groove fixing part 10 has an anti-slip part 15. The upper surface part 11 of the threshold groove fixing part 10 has a connecting member fixing part 14. One end of a connecting wire 20 as a connecting member is fixed to the connecting member fixing part 14. The other end of the connecting wire 20 is connected to a hook part 30 by a hook attachment part 24.

[0040] The hook part 30 has a ring-shaped ring part 33 for passing the connecting wire 20 through at one end, and forms a hook extending in a J shape from one end on the circular ring of the ring part 33.

[0041] FIG. 9 is a view showing a state where the threshold groove mounting hook 1 shown in FIG. 8 is attached to a threshold groove 51. FIG. 9(a) is a view when the state of attaching the threshold groove mounting hook 1 to the threshold groove 51 is viewed from the side of the elevator shaft 300 toward the landing 200. FIG. 9(b) is a view seen from above the landing 200. FIG. 9(c) is a right side view with a part in cross section.

[0042] As shown in FIGS. 9(a) to 9(c), the point that the connecting wire 20 extends upward from the threshold groove fixing part 10 housed in the threshold groove 51 and extends from the threshold groove 51 along the threshold upper surface 54 to the threshold end part 53 is the same as the example in FIG. 3. The connecting wire 20 is in close contact with the threshold upper surface 54 and extends downward along the threshold end part 53. This is because the connecting wire 20 is composed of a flexible wire, and due to the weight of the hook part 30, it is pulled downward from the threshold end part 53 and is in close contact with the threshold upper surface 54 and the threshold end part 53. In this way, the connecting wire 20 is configured such that the threshold groove fixing part 10 and the hook part 30 are arranged in accordance with the distance from the threshold groove 51 to the threshold end part 53 according to the nature of its material. The length of the connecting wire 20 has a length that hangs vertically downward from the threshold end part 53 to a position where the hook part 30 does not contact an elevator car (not shown).

[0043] As described above, with the threshold groove mounting hook 1 of the present disclosure, in the maintenance and inspection work of the elevator, it becomes possible to easily take in and out the working tools used in the elevator pit from the landing. With the threshold groove mounting hook 1 of the present disclosure, when lowering or lifting the working tools into the pit, the landing door can be closed while the threshold groove mounting hook 1 is attached to the threshold groove, and work can be carried out in the pit. Also, when exiting the landing after work as in the conventional case, there is no need to climb a ladder with the lifting rope on the arm. As a result, it no longer takes time to attach and detach the lifting rope.

Explanation of Signs

[0044] 1 Threshold groove mounting hook, 10 Threshold groove fixing part, 11 Upper surface part, 12 Side surface part, 13 Bottom surface part, 14 Connecting member fixing part / Wire fixing part, 15 Anti-slip part, 16 Fixed piece, 20 Connecting member / Connecting wire, 21 Fixed part connecting part, 22 Extension part, 23 Hook connecting part / Hook mounting part, 30 Hook part / Integrated hook part / Split hook part, 31 Hook straight part, 32 Hook tip part, 33 Ring part, 50 Landing threshold, 51 Threshold groove, 52 Threshold groove side surface, 53 Threshold end, 54 Threshold upper surface, 60 Landing door, 61 Double-leaf door center-opening door, 62 Double-leaf door single-opening door, 63 Door leg, 64 Door lower end, 100 Worker, 200 Landing, 300 Hoistway, 400 Pit, 500 Working tool, 501 Lifting rope, 502 Ladder

Claims

1. A threshold fixing part that fits into the threshold groove of the elevator landing, A connecting member that is connected to the threshold fixing part and extends from the threshold fixing part, A hook part provided at the tip side where the connecting member extends, It is a threshold mounting hook for an elevator having, The threshold fixing part is sunk and arranged in the threshold groove in a region where the legs of the elevator door do not pass when the elevator door is opened and closed, The connecting member is thinner than the gap between the upper surface of the threshold and the lower end of the elevator door. When the threshold fixing part is housed in the threshold groove, it abuts vertically along the threshold end, which is the end of the elevator landing, and suspends the hook part. A threshold mounting hook for an elevator.

2. The threshold fixing part is composed of two independently relatively displaceable fixing pieces, The connecting member has a V-shaped extension part that connects each of the two fixing pieces and the hook part, When the two fixing pieces are housed in the threshold groove, the extension part extends along the upper surface of the threshold to the threshold end. At the threshold end, it bends vertically downward along the threshold end and has a hook connecting part that connects to the hook part. The hook connecting part suspends the hook part. The threshold mounting hook for an elevator according to Claim 1.

3. The hook part has a hook straight part that is connected to the hook connecting part and extends in the vertical direction, and a hook tip part that is bent in a J shape. The lower end in the vertical direction of the hook tip part is located below the depth of the threshold groove in the vertical direction. The threshold mounting hook for an elevator according to Claim 2.

4. The extension part is formed of a metallic rod. When the V-shaped extension part is closed and the two fixing pieces are placed in the threshold groove, due to the restoring force in the direction in which the V-shaped extension part opens, the positions of the two fixing pieces are changed relatively away from each other in the threshold groove, so that the hook connecting part abuts along the vertical direction at the threshold end part. The threshold groove mounting hook for an elevator according to claim 2.

5. The threshold groove fixing part is cylindrical or prismatic. The upper surface part to which the connecting member is connected, The side surface part that fits into the threshold groove, and a bottom surface part facing the upper surface part, and has, A slip prevention part for preventing the threshold groove fixing part from coming out of the threshold groove is provided on the side surface part. The threshold groove mounting hook for an elevator according to any one of claims 1 to 4.

6. The slip prevention part is unevenness provided on the side surface part. The threshold groove mounting hook for an elevator according to claim 5.

7. The connecting member is composed of a string. When the threshold groove fixing part is placed in the threshold groove, the hook part hangs vertically along the vertical direction at the threshold end part, so that the string adheres closely to the upper surface of the threshold from the threshold groove to the threshold end part, and the hook part is suspended vertically downward from the threshold end part. The threshold groove mounting hook for an elevator according to claim 1.

8. The string suspends the hook tip part bent in a J shape of the hook part at a position below the depth of the threshold groove. The threshold groove mounting hook for an elevator according to claim 7.

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