JPH0245265Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Technical field of the invention] This invention works to minimize the jump caused by the inertia of the other during an emergency stop due to sudden descent of either the car or the counterweight due to an abnormality in the elevator. This invention relates to a compensation rope tensioning device for elevators.

[Technical background of the invention]

In recent years, as buildings have become taller, the running speed of elevators has become considerably faster, and new safety devices have become necessary. One such device is a compensating rope tensioning device for elevators, which is generally referred to as a compensator device.

To briefly explain this with reference to Figs. 5 and 6, Fig. 5 is a schematic diagram of the entire elevator, in which a car 2 and a counterweight 3 are connected to a main rope 4 in an elevator hoistway 1 of a building. They are disposed so as to be relatively raised and lowered along left and right guide rails 6 and 7, respectively, by driving the hoisting machine 5 in the upper machine room. The car 2 and the counterweight 3 are connected to each other via a governor device (not shown), etc., in the event that either of them suddenly drops at a speed higher than the rated speed or falls in the worst case due to an abnormality caused by some kind of failure or the like. automatically guide rail 6 or 7
Emergency stop devices 8 and 9 are provided at the bottom of each of the devices to make a sudden stop by firmly holding the device. In addition, hydraulic shock absorbers 10 and 11 are installed at the lower end of the hoistway 1 in case of an accidental fall, to reduce the impact of the car 2 or counterweight 3 falling and to minimize damage. I have to.

However, with only the above-mentioned safety devices such as the emergency stop devices 8 and 9 and the hydraulic shock absorbers 10 and 11, for example, if the car 2 suddenly descends as described above, the emergency stop device 8 will work and the car 2 will come to a sudden stop. However,
At this time, the counterweight 3, which rises rapidly via the main rope 4, jumps due to inertia despite the sudden stop of the car 2. If this jumping phenomenon is large, the main rope 4 becomes slack and comes off from the sheave groove of the hoist 5 or gets caught on other equipment, and in this state, the counterweight 3, which had once jumped, falls. At times, a large impact force is applied to the main rope 4, which may lead to an unexpected serious accident. Also, contrary to the above, when the counterweight 3 suddenly drops or suddenly stops, a phenomenon occurs in which the car 2 jumps up and falls, and furthermore, one of the car 2 and the counterweight 3 is at the lower end. Hydraulic shock absorber 10 or 1
Even if one collides with the other, the other will jump up.

For this reason, as a preventive measure against the above-mentioned jump phenomenon,
An elevator compensating rope tensioning device 12 called a compensator device is installed at the lower end of the hoistway 1 . This is the car 2 and counterweight 3 mentioned above.
By wrapping the lower U-shaped part of the compensating rope 13, which has both ends connected and hanging down, when either the car 2 or the counterweight 3 suddenly stops, the jump caused by the inertia of the other can be prevented. The compensation rope 14
It functions to suppress the amount of water to a small level through the .

Here, the configuration of the conventional compensating rope tensioning device 12 for an elevator will be described with reference to FIG. A support frame 15 is provided to be slidable in the vertical direction via a support frame 15 (not shown), and a tension wheel 16 on which a plurality of compensating ropes 13, which are usually arranged in parallel, is wound around the support frame 15, can be freely rotated by a shaft 17. It is installed on. Further, a press plate 18 is arranged above the top plate 15a of the support frame 15, and a rod 19 hanging from the center of the press plate 18 is passed through the top plate 15a, and the spring catch 20 in the middle is connected to the top plate. A compensating spring 21 is interposed between the top plate 15a and the holding plate 18, and a plurality of rods 22 are provided penetrating the top plate 15a and the holding plate 18, and a pair of upper and lower spring receivers in the middle of these rods 22 and the top plate. Tie-down springs 23a and 23b are provided between each of the holding plate 15a and the holding plate 18. In this way, a pair of left and right blocks 24 are provided on the upper surface of the presser plate 18 which is held above the support frame 15 so as to be able to move up and down within a suitable range, and a guide shoe 25 that slides into contact with the left and right compensating rails 14 is provided on the upper surface of each of the left and right blocks 24. This is the configuration provided. Each of the left and right blocks 24 is a U-shaped planar block that opens outward, and the left and right compensator rails 14 pass through an outer recess 24a, and one side surface 2 of the recess 24a extends through the left and right compensating rails 14.
4b is inclined in a tapered shape, and one inclined side surface 24
A biting roller 2 is placed between the compensator rail 14 and b.
6 are supported by levers 27, and each lever 27 is pivotally connected to an angle 28 provided at the upper end of the rod 22.

In the conventional compensating rope tensioner device 12 having the above configuration, during normal operation of the elevator, the load of the block 24 etc. is transferred from the holding plate 18 to each rod 19,
Compensation spring 21 and tie-down spring 2 of 22
3a, 23b to the support frame 15 as a downward force, and while applying appropriate tension to the compensating rope 13 with the tension wheel 16, the compensating rope 1
It allows free reciprocating movement following the cage 2 and counterweight 3 of No. 3. Here, when either the car 2 or the counterweight 3 suddenly falls due to an abnormality and is suddenly stopped by the emergency stop device, the other one tries to jump up due to inertia, but in this case, the jumping force is the tension wheel 1 from the compensation rope 13
6 to the support frame 15, and the support frame 1
5 rises against the load of the block 24 etc.,
Accordingly, the rod 22 lowers the biting roller 26 via the lever 27, so that the roller 26 bites between the compensating rail 14 and one inclined side surface 24b in the recess 24a of the block 24. This locks the movement of the presser plate 18 with respect to the left and right compen rails 14, prevents the support frame 15 from rising any further, and suppresses the above-mentioned jumping phenomenon to a small level.

[Problems with background technology]

By the way, as mentioned above, the conventional compensating rope tensioning device 12 for elevators has a very complicated structure and operating mechanism, has a large number of parts, and is troublesome to manufacture, assemble, and install, resulting in high costs. There was also the problem that maintenance took a lot of time.

[Purpose of invention]

This idea was devised in view of the above circumstances, and has a very simple structure, facilitates manufacturing, assembly, and maintenance, and also prevents the phenomenon of the car or counterweight jumping up due to a sudden stop when an elevator abnormality occurs. To provide an inexpensive compensating rope tensioning device for an elevator that is small and can be held down reliably.

[Summary of the idea]

In order to achieve the above object, the compensating rope tensioning device for elevators of this invention has a pair of left and right compensating rails erected at the lower end of the elevator hoistway.
A support frame that pivotally supports a tension wheel around which the lower U-shaped portion of the compensation rope is wound between both compensator rails is provided so as to be slidable in the vertical direction, and is placed above the support frame in a frictional relationship with both compensator rails. A stopper is provided which absorbs the jumping force by the frictional force with both compensation rails when the support frame rises due to the jumping force due to the inertia of the car or the counterweight arranged together and collides with each other, and from this stopper. Furthermore, an auxiliary stopper is fixed to the left and right compensator rails, which prevents the stopper from rising any further in the event of a collision. When the user tries to jump up, the support frame of the compensating rope tension wheel rises a little due to the jumping force, and then hits the stopper directly, and the stopper absorbs the jumping force due to the frictional force with the left and right compensating rails, and then moves upward. This causes the support frame to move upward to a small level, and eventually this stopper comes into contact with the auxiliary stopper, completely preventing further rise. This makes it possible to reliably suppress the phenomenon of jumping up due to the inertia of the car or counterweight. In addition, there is no longer a need for a very complicated operating mechanism such as a lock that prevents the support frame from rising as in the past, and the configuration is extremely simple, making manufacturing, assembly, and maintenance easy, and reducing costs. .

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 1 and 2. The overall configuration of the elevator is the 5th one.
Since it is the same as shown in the figure, illustration is omitted.

In the figure, numeral 30 indicates the entire elevator compensating rope tensioning device of the present invention. In this structure, a pair of left and right compensating rails 31 made of vertically long angle members are erected and fixed at the lower end of the elevator hoistway, and a support frame 3 is placed between the compensating rails 31.
2 is placed. This support frame 32 has a strong box shape with the front and rear sides open, and has a pair of upper and lower guide shoes 33 on the left and right outer surfaces, and these guide shoes 33 are connected to the left and right compensating rails 31.
By slidingly fitting into the holder, the holder is guided and held so as to be slidable in the vertical direction. A tension wheel 34 is rotatably attached between both side plates of this support frame 32 via a shaft 35, and a tension wheel 34 is connected to a car and a counterweight at both ends and hangs down, as in the past. The lower U-shaped portions of the plurality of compensation ropes 13 are wrapped around each other. The support frame 32 and the tension wheel 3 provided thereon
The fourth grade is set to a certain weight so that appropriate tension is applied to the compensating rope 13 by these loads.

On the other hand, a stopper 36 is provided horizontally at a position spaced above the support frame 32 of the left and right compen rail 31 by an X dimension (for example, about several cm). These stoppers 36 each consist of a pair of flat plate-shaped front and rear stoppers, and both the front and rear stoppers 36 are attached to the left and right compensating rails 36 as shown in FIG.
are arranged opposite to each other in the front and rear so as to be sandwiched between the two end sides, and the parts closer to each other's ends (the parts closer to the inside that do not interfere with the left and right compen rails 31) are tightened by a plurality of bolts 37 and nuts 38, respectively. It is held in pressure contact with the front and rear surfaces of the left and right compen rails 31 so as to frictionally engage with them.

Further, an auxiliary stopper 39 is provided horizontally at a position further above the stopper 36 of the left and right compensating rail 31 and spaced apart by the Y dimension (approximately twice the X dimension). This auxiliary stopper 39
The stoppers 36 are made of a pair of flat plate-shaped front and rear stops, respectively, and the left and right compen rails 3
1 are placed opposite each other in the front and back so as to sandwich them between the side parts of both ends.
(overlapping part) with multiple bolts 40 each.
It is tightened and fixed by a nut 41. Each of the bolts 40 is attached to pass through the compen rail 31, so that the front and rear auxiliary stoppers 39 are completely fixed to the left and right compen rails 31, and also function as a connecting plate between the left and right compen rails 31. It's getting old.

Accordingly, with the compensation rope tension sheave device 30 for an elevator of the present invention described above, during normal operation of the elevator, the support frame 32 and the tension sheave 3 attached thereto are
While applying an appropriate tension to the compensating rope 13 by a load such as No. 4, the compensating rope 13 is free to move back and forth following the elevation and descent of the car and the counterweight. Here, if either the car or the counterweight suddenly falls due to an abnormality and is stopped suddenly by the emergency stop device, and the other one tries to jump up due to inertia, the lifting force will be applied to the compensation rope. 13 to the support frame 32 via the tension wheel 34. As a result, the support frame 32 is pulled up along the left and right compen rails 31, and when it rises a little, it directly hits the stopper 36 and tries to push the stopper 36 up. At this time, since the stopper 36 is not completely fixed to the left and right compensating rails 31 but is frictionally engaged with the left and right compensating rails 31, the stopper 36 moves upward as if shifting relative to the left and right compensating rails 31, and the frictional force at that time increases. This absorbs the jumping force and restricts the lifting of the support frame 32, thereby suppressing the jumping phenomenon caused by the inertia of the car or counterweight to a small level. If the force of the jump cannot be absorbed by the frictional force of the stopper 36 alone, the stopper 36 will rise in the Y dimension and then hit the auxiliary stopper 39 fixed to the left and right compen rails 31, thereby preventing further rise. This will completely suppress the jump.

In this way, the rise of the support frame 32 is received by the stopper 36 and the auxiliary stopper 39, and is suppressed and locked, so there is no need for a very complicated operating mechanism as in the past, and the configuration is extremely simple, greatly reducing the number of parts. This makes manufacturing, assembly, and maintenance easier, and costs can be reduced.

Next, another embodiment of this invention will be explained with reference to FIGS. 3 and 4.

First, in the embodiment shown in FIG. 3, long bolts 37A are passed through the opposite sides of a pair of front and rear stoppers 36 arranged to sandwich the left and right compensator rails 31 from both sides, and a long bolt 37A is inserted into the tip side of each bolt 37A. Nut 3 via spring 42 and spring seat 43
8 are screwed together and the front and rear stoppers 36 are tightened together. As a result, the frictional force of the front and rear stoppers 36 against the left and right compen rails 31 can be kept constant, and the jumping force can be absorbed well.

Further, in the embodiment shown in FIG. 4, when a pair of front and rear stoppers 36 is arranged so as to sandwich the left and right compen rail 31 from both sides, each stopper 36
Friction pieces 44 are interposed between the left and right compensation rails 31, and are tightened with bolts 37 and nuts 38. As a result, the frictional force between the front and rear stoppers 36 and the left and right compen rails 31 can be stably obtained, and the jumping force can be well absorbed, thereby further promoting the above-mentioned effects.

Furthermore, in addition to the embodiment shown in FIG. 4 in which the friction piece 44 is interposed, it is also possible to construct a structure in which the spring 42 shown in FIG. effect will be obtained.

[Effect of idea]

Since this idea was developed as described above, it has a much simpler structure than the conventional one, and it is easier to manufacture, assemble, and maintain, reducing costs.In addition, it is possible to avoid sudden stops when an abnormality occurs in the elevator. The phenomenon of jumping up of the car or the counterweight can be suppressed to a small extent and reliably, resulting in a highly practical compensation rope tensioning device for an elevator.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of this invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a sectional view corresponding to Fig. 2 showing another embodiment of this invention. 4 is a sectional view corresponding to FIG. 2 showing still another embodiment of this invention, FIG. 5 is a schematic diagram of the entire elevator, and FIG. 6 is a conventional compensating rope tensioner device. FIG. 1... Hoistway, 2... Car, 3... Counterweight, 4... Main rope, 5... Hoisting machine, 6,
7... Guide rail, 8, 9... Emergency stop device,
10, 11...Hydraulic shock absorber, 13...Compensation rope, 30...Compensation rope tensioner device, 31...Compensation rail, 32...Support frame, 33...Guide shoe, 34...Tensioner, 35... Axis, 36...
Stopper, 37, 37A, 40... Bolt, 3
8,41...Natsuto, 39...Auxiliary stopper, 4
2... Spring, 43... Spring catch, 44... Friction piece.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The lower U-shaped part of the compensating rope, which is installed at the lower end of the elevator hoistway and hangs down with both ends connected to the car and the counterweight, is wrapped around it. , In an elevator compensation rope tensioning device that works to suppress the jump due to the inertia of the other during an emergency stop due to sudden descent of either the car or the counterweight due to an abnormality, there are A pair of compensating rails are erected, and a support frame is provided between the two compensating rails that pivotally supports a tension wheel around which the lower U-shaped portion of the compensating rope is wound, and is slidable in the vertical direction. It is arranged in an upper position in frictional engagement with both the compensator rails, and when the support frame rises due to the jumping force due to the inertia of the car or counterweight and collides with it, the jumping force is absorbed by the frictional force with both the compensating rails. For an elevator, comprising a stopper for absorbing the noise, and an auxiliary stopper fixed to the left and right compen rails, which prevents the stopper from rising any further when the stopper rises and collides with the stopper at a position further above the stopper. Compensation rope tensioning device. (2) The compensating rope tension sheave device for an elevator according to claim 1, wherein the stopper is frictionally engaged with the left and right compen rails via friction pieces. (3) Claims 1 or 2 of the utility model registration claim, characterized in that the stoppers are provided as a pair of front and rear stoppers so as to sandwich the left and right compen rails from the front and back through friction pieces and frictionally engage with each other. Compensation rope tensioning device for elevators as described. (4) Compensation for an elevator according to claim 3 of the utility model registration claim, characterized in that the pair of front and rear stoppers are tightened by a spring-mediated tightening tool so as to sandwich the left and right compen rails from the front and back. Rope tension car device.