Device for fixing car and weight frame

Abstract

To provide means capable of easily loading / unloading a balance weight in a hoistway intermediate part.SOLUTION: A device 1 is for fixing a car and a weight frame for engaging a car 20 and a weight frame 30 in the intermediate part of a hoistway 110. This fixing device 1 comprises: a fastener 2 fixed to the weight frame 30; and a telescopic suspension tool 10 connected at one end to the fastener 2 and at the other end to a beam 23 provided at an upper part of the car 20.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fixing device between a car and a weight frame, particularly a fixing device between a car and a weight frame when changing counterweights.

Background Art

[0002] Among rope-type elevators, traction elevators generally connect a weight frame for loading a car and counterweights in a hoistway with a wire rope, and drive a winch installed at the upper part of the hoistway to wind up or unwind the wire rope to move the car. When the weight of the car changes due to specification changes or the like, a partial unloading and loading operation of the counterweights occurs. Depending on the type of counterweights, an operation of unloading all the existing counterweights and loading new counterweights may occur.

[0003] Generally, the unloading and loading operations of the counterweights are carried out after fixing the car and the weight frame respectively to ensure safety in the hoistway. Specifically, the beam provided at the upper part of the car is connected to the winch base to fix the car at the upper part of the hoistway, and the weight frame is fixed by a support erected at the bottom of the hoistway. Since the weight frame generally has a vertical height of about 3 m, a series of operations for unloading and loading the counterweights, such as scaffolding assembly, unloading and loading of the counterweights, and removal of the scaffolding, include a number of steps and require a great deal of time and labor until completion.

[0004] Therefore, a method has been proposed to enable the loading operation of the counterweights in the middle part of the hoistway (see Patent Document 1). Patent Document 1 describes that by providing working holes in the counterweights, dividing the counterweights, or engaging the counterweights with a rope engaged with a winch installed on the car, the counterweights can be easily loaded into the weight frame even in the middle part of the hoistway.

Prior Art Documents

Patent Documents

[0005] Patent Document 1 Japanese Unexamined Patent Application Publication No. 2010-006482 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0006] As described above, the work of loading and unloading the counterweight near the bottom of the hoistway takes a lot of time. Further, in the technique disclosed in Patent Document 1, the counterweight moves from the car side to the counterweight frame side before and after the work of loading the counterweight. In this case, even if the power of the elevator is stopped, the wire rope connecting the car and the counterweight frame may slip, and the positional relationship between the car and the counterweight frame may change, but no consideration has been given to this. MEANS FOR SOLVING THE PROBLEMS

[0007] The fixing device between the car and the counterweight frame according to the present invention is a device for engaging the car and the counterweight frame in the middle part of the hoistway, and includes a fixture having a fixing hole fixed to the counterweight frame, and a telescopic suspension member having one end connected to the fixing hole of the fixture and the other end connected to a beam portion provided on the upper part of the car. EFFECTS OF THE INVENTION

[0008] According to the present invention, since the car and the counterweight can be fixed in the vicinity in the hoistway, the work of loading and unloading the counterweight can be easily performed in the middle part of the hoistway. BRIEF DESCRIPTION OF THE DRAWINGS

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiments described below are merely examples, and the present invention is not limited to the following embodiments. FIG. 1 is a diagram showing a schematic configuration for explaining an elevator mechanism. FIG. 2 is an overall perspective view for explaining the usage mode of the fixing device between the car and the weight frame which is an example of the embodiment.

[0011] As shown in FIG. 1, in the elevator, the car 20 carrying the passenger 100 can move up and down in a vertically long space called the hoistway 110, thereby transporting the passenger 100 to another floor 101. Among traction elevators of the rope type, the traction elevator includes a car 20, a weight frame 30, and a wire rope 111 in the hoistway 110. One end in the hoistway 110 is connected to the car 20 and the other end is connected to the weight frame 30 in a pendulum-like manner via a hoisting machine 112 above the hoistway 110. The counterweight 31 described later is loaded in the weight frame 30 and has a function of generating frictional force between the wire rope 111 and the hoisting machine 112. When the hoisting machine 112 winds up or winds down the wire rope 111, the car 20 moves up and down in the hoistway 110.

[0012] The car 20 includes a car door 21 for passengers 100 to get on and off, and a car frame 22 that supports the car 20. The car door 21 engages with the landing door 102 on each floor 101 and is opened to form an entrance / exit (not shown) on each floor 101.

[0013] As shown in FIG. 2, the car frame 22 that constitutes the car 20 includes a beam portion 23 disposed in the upper bay direction of the car 20, a lower beam portion 24 disposed in the lower bay direction of the car 20 and supporting the car 20 from below, and a pair of vertical columns 25 perpendicularly connected to the longitudinal ends of the beam portion 23 and the longitudinal ends of the lower beam portion 24. The beam portion 23, the lower beam portion 24, and the vertical columns 25 connect their respective ends by, for example, bolts (not shown).

[0014] The vertical column 25 that constitutes the car frame 22 has, for example, guide shoes (not shown) protruding outward from the upper and lower ends. The car 20 can move up and down in the hoistway 110 when the guide shoes are guided by guide rails (not shown) installed in the hoistway 110.

[0015] The counterweight 31 loaded in the counterweight frame 30 connected to the car 20 by a wire rope 111 is, for example, a plurality of flat metal weights. The total weight of the counterweight 31 is designed to be the sum of the weight of the car 20 and half of the rated load capacity multiplied by the weight. Individual counterweights 31 can be inserted and removed through the gaps in the counterweight frame 30 to adjust the total weight.

[0016] The weight frame 30 is a metal frame that houses the counterweight 31, and is provided with a weight retention plate 32 on the vertical frame. The weight retention plate 32 has the function of preventing the counterweight 31 from moving up and down or coming off the weight frame 30 when the weight frame 30 moves up and down in the hoistway 110. Further, the weight retention plate 32 is provided with a weight retention hole 33, and by inserting a bolt (not shown) into this weight retention hole 33 or engaging a jig (not shown), the counterweight 31 can be pressed down, and the movement of the counterweight 31 when the weight frame 30 moves up and down can be suppressed.

[0017] Using FIGS. 3 and 4, the details of the fixing device 1 between the car and the weight frame, which is an example of the embodiment, will be described. FIG. 3 is an enlarged perspective view of the fixing device between the car and the weight frame, which is an example of the embodiment. FIG. 4 is an enlarged view of the fastener and its vicinity in the fixing device between the car and the weight frame, which is another example of the embodiment.

[0018] The fastener 2 fixed to the weight retention hole 33 is a plate-shaped jig, and has a bolt attachment hole 3 at one end and a fixing hole 4 at the other end. The bolt attachment hole 3 has the function of fixing the fastener 2 to the weight frame 30 by being screwed with the weight retention hole 33 and the bolt 5. The bolt attachment hole 3 is configured to have the same diameter as the weight retention hole 33. In order to suppress the rotation of the fastener 2 around the bolt 5 during use, it is preferable that at least two bolt attachment holes 3 are provided. The fixing hole 4 is a through hole provided away from the bolt attachment hole 3 of the fastener 2, and is coupled to a suspension tool 10 described later. The size of the fixing hole 4 is designed to be a size that does not interfere with the strength of the fastener 2 and the like.

[0019] The hoisting tool 10 is a telescopic device with one end connected to the fixing hole 4 of the fastener 2 and the other end connected to the beam portion 23 provided on the upper part of the car 20, and includes a chain block 11. The chain block 11 is composed of a chain block main body 12, an upper hook 13 for suspending the chain block main body 12, a load chain 14 hung on a load sheave (not shown) inside the chain block main body 12, a lower hook 15 coupled to the lower end of the load chain 14, and a hand chain (not shown) hung on a hand wheel (not shown) arranged adjacent to the load sheave. When the hand chain is wound up, the hand wheel rotates, and the rotation is transmitted to the load sheave through a predetermined transmission mechanism, and the load chain 14 is wound up. Conversely, when the hand chain is wound down, the load chain 14 is wound down. By such a mechanism, the chain block 11 expands and contracts by winding up or winding down the load chain 14.

[0020] The hoisting tool 10 is provided with an upper rope 16 on the side of the upper hook 13 constituting the chain block 11 and a lower rope 17 on the side of the lower hook 15 constituting the chain block 11. The upper hook 13 is coupled to the upper rope 16 connected to the fixing hole 4 of the fastener 2. The upper hook 13 may be directly coupled to the fixing hole 4 without passing through the upper rope 16. The lower rope 17 is connected to the beam portion 23 provided on the upper part of the car 20.

[0021] As shown in FIG. 3, it is preferable to use two fasteners 2 and two hoisting tools 10, that is, a pair. The fastener 2 protrudes outside the weight frame 30, and the fixing hole 4 is arranged outside the weight frame 30. Generally, since the frontage width of the car 20 is wider than the frontage width of the weight frame 30, when the fixing hole 4 is arranged outside the weight frame 30, the hoisting tool 10 is arranged in a shape close to perpendicular to the fastener 2 and the beam portion 23, so that stable fixing of the car and the weight frame is realized.

[0022] On the other hand, in the design of the hoistway 110, when it is inconvenient for the fixture 2 to protrude outside the weight frame 30, etc., as shown in FIG. 4, the fixture 2 may protrude inside the weight frame 30, and the fixing hole 4 may be arranged inside the weight frame 30. Since the suspension tool 10 is telescopic and has a function of applying tension between the car 20 and the weight frame 30, even when the fixing hole 4 is arranged inside the weight frame 30, it is possible to fix the car and the weight frame.

[0023] Referring to FIG. 5, a method for adjusting the position of the car 20 when loading and unloading the counterweight 31 from the weight frame 30 using the fixing device 1 for the car and the weight frame according to an example of the embodiment will be described. FIG. 5 is a flowchart showing the procedure for adjusting the position of the car when using the fixing device for the car and the weight frame according to an example of the embodiment.

[0024] By using the fixing device 1 for the car and the weight frame, the car 20 and the weight frame 30 are fixed in the vicinity in the middle part of the hoistway 110, so that an operator (not shown) can load and unload the counterweight 31 on the car 20. However, generally, the weight frame 30 has a vertical length of about 3 m, and there is a limit to the number of counterweights 31 that an operator on the car 20 can load and unload in one fixing. Therefore, it is necessary to move the position of the car 20 below the weight frame 30 during the work.

[0025] Therefore, first, among the pair of fixing devices 1 for the car and the weight frame, one suspension tool 10-1 (hereinafter referred to as the first suspension tool) is removed from the connected fixture 2-1 (hereinafter referred to as the first fixture) (S101). In this case, since a tension is applied between the car 20 and the weight frame 30 by the other suspension tool 10-2 (hereinafter referred to as the second suspension tool), the car 20 and the weight frame 30 are fixed even when the first suspension tool 10-1 is removed.

[0026] Next, the bolt 5 of the first fixture 2-1 is removed, and the first fixture 2-1 is moved. The first fixture 2-1 is fixed by screwing it with the bolt 5 into the anti-disengagement hole 33 below the anti-disengagement hole 33 for the weight that was screwed together (S102).

[0027] After newly fixing the first fastener 2-1, connect the first suspension tool 10-1 and the moved first fastener 2-1 (S103). Since the first fastener 2-1 is located at a position lower than before it moved, in some cases, it is necessary to extend the first suspension tool 10-1 when connecting. When the first suspension tool 10-1 is extended, there is no tension between the car 20 and the weight frame 30 on the first suspension tool side.

[0028] Therefore, next, contract the first suspension tool 10-1 to tense it, apply tension between the car 20 and the weight frame 30, and fix both with the first suspension tool 10-1 (S104).

[0029] Similarly, remove the second suspension tool 10-2 from the connected fastener 2-2 (hereinafter referred to as the second fastener) (S105). In this case, since there is tension between the car 20 and the weight frame 30 by the first suspension tool 10-1 in S104, the car 20 and the weight frame 30 are fixed even if the second suspension tool 10-2 is removed.

[0030] Next, remove the bolt 5 of the second fastener 2-2 and move the second fastener 2-2. Screw the bolt 5 into the weight release prevention hole 33 at the same height as the position where the first fastener 2-1 moved and fixed in S102 to fix the second fastener 2-2 (S106).

[0031] After newly fixing the second fastener 2-2, connect the second suspension tool 10-2 and the moved second fastener 2-2 (S107). Since the second fastener 2-2 is located at a position lower than before it moved, in some cases, it is necessary to extend the second suspension tool 10-2 when connecting. When the second suspension tool 10-2 is extended, there is no tension between the car 20 and the weight frame 30 on the second suspension tool 10-2 side.

[0032] Therefore, next, contract the second suspension tool 10-2 to tense it, apply tension between the car 20 and the weight frame 30, and fix both with the second suspension tool 10-2 (S108).

[0033] From the state where both the first lifting tool 10-1 and the second lifting tool 10-2 are coupled to the lower fixing hole 4 and the weight frame 30 is fixed below the car 20, the two lifting tools are alternately extended little by little to gradually relieve the tension of the two lifting tools, thereby gradually moving the position of the car 20 below the weight frame 30. When the operator on the car 20 adjusts the position of the car 20 to a position where they can reach the counterweight 31 in the weight frame 30, the relaxation of the two lifting tools is stopped, and the position adjustment of the car 20 is completed.

[0034] As described above, by using the fixing device 1 for the car and the weight frame having the above configuration, the car 20 and the weight frame 30 can be fixed in the vicinity in the hoistway 110. Therefore, not only can the loading and unloading operations of the counterweight 31 be safely performed, but it is also not necessary to install a scaffold at the bottom of the hoistway 110, and the process can be significantly shortened.

[0035] Note that the above embodiment can be appropriately modified in design without impairing the object of the present invention. For example, as shown in FIG. 6, a fastener 2 having a plurality of fixing holes 4 may be used. When adjusting the position of the car 20 during the loading and unloading operation of the counterweight 31, the fastener 2 having a plurality of fixing holes 4 does not require the movement of the fastener 2 itself, and the position of the car 20 can be adjusted only by changing the connection position between the lifting tool 10 and the fixing hole 4. Therefore, the loading and unloading operation of the counterweight 31 can be further simplified.

Explanation of Signs

[0036] 1 Fixing device for the car and the weight frame, 2 Fastener, 3 Bolt mounting hole, 4 Fixing hole, 5 Bolt, 10 Suspender, 11 Chain block, 12 Chain block body, 13 Upper hook, 14 Load chain, 15 Lower hook, 16 Upper rope, 17 Lower rope, 20 Car, 21 Car door, 22 Car frame, 23 Beam part, 24 Lower beam part, 25 Vertical column, 30 Weight frame, 31 Counterweight, 32 Weight detachment prevention plate, 33 Hole for preventing weight detachment, 100 Passengers, 101 Floor, 102 Landing door, 110 Hoistway, 111 Wire rope, 112 Hoisting machine

Claims

1. A fixing device for a car and a weight frame for engaging the car that carries passengers and moves up and down in an elevator shaft and the weight frame that carries a counterweight for balancing the car at an intermediate part of the elevator shaft, a fixture having a fixing hole, fixed to the weight frame, a telescopic suspension member having one end connected to the fixing hole of the fixture and the other end connected to a beam portion provided at an upper part of the car, The fixing device for the car and the weight frame, comprising:

2. The fixing device for the car and the weight frame according to claim 1, further comprising two of the fixtures and two of the suspension members respectively.

3. The fixing device for the car and the weight frame according to claim 1, wherein the fixture protrudes outside the weight frame, and the fixing hole is disposed outside the weight frame.

4. The fixing device for the car and the weight frame according to claim 1, wherein the fixture protrudes inside the weight frame, and the fixing hole is disposed inside the weight frame.

5. The fixing device for the car and the weight frame according to claim 1, wherein the suspension member includes a chain block.

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