JPH01294183A - Tension pulley - Google Patents

Abstract

PURPOSE:To prevent a rope from excessively approaching the guide rail of an elevator by constituting the support structure of the tension pulley of the rope for a governor operating the safety device of an elevator so that the rope is invariably kept at the fixed distance from the rail. CONSTITUTION:Rail fitting metals 4 and 21 are fitted to the guide rail of an elevator. One end of a link member 23 is pin-connected to the upper fitting metal 4, one end of a link member 24 is pin-connected to the other end. One end of a link member 26 is pin-connected to the other end of the link member 24, the other end is pin-connected to the fitting metal 21. A tension pulley 3 is fitted at the center of the link member 24, a weight 8 is suspended at this center section via a weight suspending plate 7. One end of the like member 23 is fitted downward with an angle theta1, the other end of the link member 26 is fitted downward with an angle theta3, if the following conditions are satisfied: theta1>=0, theta3<0, or theta1<0, theta3>=0, the displacement in the horizontal direction between the link member 23 and the link member 26 is offset.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a tension sheave support structure for applying tension to a rope hung on a speed governor that operates an elevator safety device.

[Conventional technology]

FIG. 3 shows a conventional tension wheel support structure, which is disclosed in, for example, Japanese Patent Laid-Open No. 61-238684. This support structure is of a link type, and one end of a tension single arm 2, which is a link member, is connected with a pin to a guide rail 1 of the elevator, and a tension wheel 3 is attached to the other end. That is, a rail mounting bracket 4 is attached to the guide rail 1 of the elevator with a mounting bolt 5, and one end of the tension single arm 2 is connected to the rail mounting bracket 4 by a pin connection 6.
has been done. A tension wheel 3 is attached to the other end of the tension single arm 2, and at the same time a weight 8 is suspended via a weight suspension plate 7. Note that both the tension wheel 3 and the weight hanging plate 7 are attached around the shaft 9. A governor rope 10 that is hung around an elevator speed governor is wound around the tension wheel 3. Due to the link type support structure, the weight 8 always applies a constant tension to the governor rope 10. That is, when the governor rope 10 is stretched, the tension wheel 3 is lowered by the action of the weight 8, and the tension single arm 2 supporting the tension wheel 3 rotates around the pin connection 6.

[Problem to be solved by the invention]

When the governor rope 10 is stretched and the tension wheel 3 is lowered, the tension single arm 2, which is a link member, moves together around the pin connection 6, so that even if the tension single arm 2 is initially set horizontally, the tension gradually increases. The single arm 2 is tilted and the governor 4-arm 10
was approaching rail 1. This caused a problem in that the lever pin position of the emergency stop device, which is a safety device, and the position of the governor rope (hereinafter simply referred to as rope) 10 were misaligned. The present invention aims to provide a support structure that allows the rope to always maintain a certain distance from the rail when the rope is stretched and the tensioned wheel descends, even if the support structure is a link type support structure. With the goal.

[Means to solve the problem]

The tension wheel of the present invention is supported by a link mechanism composed of three link members instead of one link member as in the conventional art. That is, the tension wheel of the present invention is a link mechanism that supports the tension wheel for applying tension to a rope hung on an elevator governor, and one end of the first link member is pin-coupled to the guide rail of the elevator, and the other end is connected to the guide rail of the elevator. the second link member is pin-coupled to one end of the second link member, the other end of the second link member is pin-coupled to one end of the third link member, the other end of the third link member is pin-coupled to the guide rail, and the second link member A tension wheel is attached to approximately the center of the frame, the one end of the first link member is attached downward at an angle of θ with respect to the horizontal plane, and the other end of the third link member is attached downward at an angle of 03 with respect to the horizontal plane. Assuming that θ, ≧0. By satisfying the condition θ, (0 or θ, θ2θ3≧0, the horizontal displacement due to the rotation of the first link member and the rotation of the third link member when the rope is stretched and the tension wheel is lowered) This tension wheel has a link mechanism in which the length and attachment angle of each link member are determined so that the horizontal displacements cancel each other out.

[Function] Mounting angle θ7 between the first link member and the second link member. θ2
By making the direction opposite to the horizontal plane, the horizontal displacement due to the rotation of the first link member and the horizontal displacement due to the rotation of the third link member can be offset. This horizontal displacement is expressed, for example, at both ends of the second link member, but if one end of the second link member is displaced to the right, the other end is displaced to the left, thereby attaching the second link member to the second link member. It is possible to make the horizontal displacement of the 9-wheeled vehicle almost zero. [Embodiment] An embodiment of the tension wheel of the present invention will be described with reference to FIGS. 1 and 2. Note that the same parts as in FIG. 3 showing the conventional example are given the same reference numerals, and the description thereof will be omitted. Two rail attachment fittings 4 and 21 are attached to the guide rail 1 of the elevator in the vertical direction with attachment bolts 5 and 22, respectively. One end of the first link member 23 is connected to the upper mounting bracket 4 by a pin 6. This first link member 2
One end of the second link member 24 is connected to the other end of the pin connection 25.
be done. At the other end of the second link member 24

One end of the third link member 26 is connected with a pin 27. Third link member 2
The other end of 6 is pin-coupled 28 to the lower mounting bracket 21 . The tensioner 3 is attached to the center of the second link member 24. Further, a weight 8 is suspended from the center via a weight suspension plate 7 as in the conventional case. When the above link mechanism is first installed, the first link member 23 is installed horizontally (θ, = 0), the second link member 24 is installed vertically, and the third link member 26 is attached to the pin to the guide rail 1. The joint 28 end is attached at an upward angle of -63 to the horizontal plane. Next, FIG. 2 shows the state when the rope 10 is stretched and the tension wheel 3 is lowered. At this time, the first link member 23 rotates and the other end is displaced to the right in the horizontal direction. Furthermore, due to the rotation of the third link member 26, one end of the third link member 26 is displaced to the left in the horizontal direction. This simultaneously means that one end of the second link member 24 is displaced to the right and the other end is displaced to the left. The length and attachment angle of each link member are predetermined so that the left and right displacements are of the same magnitude. The lengths of the first, second, and third link members are 1. ．． 12.13
The angle of the first link member relative to the horizontal plane after rotation is α as shown in the figure, and the horizontal distance of the first tension wheel from the guide rail 1 is X. If the horizontal distance from the guide rail 1 to the other end of the first link member after the rope is stretched is X, and the horizontal distance from the guide rail 1 to one end of the third link member is X2, then Xo= t+, ... ■X, = l, co
sa, =■X2=13 ・■. At this time, in order to prevent the horizontal distance of the tension wheel 3 from changing even after the rope is stretched, Xo=+ (
x+ ten The rope stretches from the state shown in Figure 1 and reaches the first position.
Assuming that the angle α at which the link member rotates is given, if '1p13 is determined to satisfy the equation (2), the horizontal position of the tension wheel will be maintained. At this time θ
, =O, and by determining '+ and 12, θ3 is also automatically determined. The above embodiments have been described on the assumption that each link member is set in the state shown in FIG. 1, and that the rope changes as shown in FIG. 2 after being stretched. However, the present invention is not limited to such a special link mechanism, and other embodiments are also possible. This will be explained based on FIG. 4. That is, although (A) in the figure shows the above-described embodiment, other embodiments such as B) and (C) can also be defined. (B) shows that the first link member 23 does not necessarily have to be set horizontally. That is, the first link member 23 is attached at a downward angle θ with respect to the horizontal plane, and the second link member 24 is attached not perpendicularly but obliquely. However, even when the rope shown by the chain line is stretched, the horizontal displacement of the tension wheel (shown by the shaft 9) is approximately O. In (C), the first link member 23 is attached at an upward angle (-θ,) with respect to the horizontal plane. Similarly, the third link member is also attached at a downward angle θ3. this(
In the embodiment C), the horizontal displacement of the tension wheel can also be zero. If we look at these (A), (B), and (C), we can say the following. That is, in order to offset the horizontal displacement of both ends of the second link member and make the horizontal displacement of the tension wheel zero,
One end of the first link member 23 that is pin-coupled to the guide rail 1 is attached downward to the horizontal plane at an angle of θ, and the other end of the third link member 26 that is pin-coupled to the guide rail 1 is attached at an angle of θ3 with respect to the horizontal plane. Assuming that it is attached at an angle of θ, ≧0. It is necessary to satisfy the following conditions: θ3<0 or θ1<0, θ3≧0. In other words, the link member attached downward is displaced to the right by rotation, and the link member attached upward is displaced to the left in the horizontal direction, so the first link member and the third link member are vertically disposed relative to the horizontal plane. Must be installed in the opposite direction. If this condition is satisfied, the length of each link member is IP12.
1. and mounting angle θ1. It is thought that there are countless combinations of θ2. Effects of the Invention According to the tension wheel of the present invention, even if the rope stretches and the tension wheel lowers, the horizontal displacements of the first link member and the third link member cancel each other out, and the tension wheel attached to the second link member The horizontal displacement of can be set to zero. Therefore, it is possible to prevent the rope from coming too close to the guide rail of the elevator.

[Brief explanation of the drawing]

Figure 1 is a side view of the first embodiment of this tension wheel, Figure 2 is a diagram showing the operation of Figure 1, Figure 3 is a side view of a conventional device, Figures 4 (A) and (B). (C) is a schematic side view showing other embodiments. 2... Tension single arm (link member), 3... Tension wheel, guide rail of toe elevator, 4... Rail mounting bracket, 5
...Mounting bolt, 6...Pin connection, 7...Omosho hanging plate, 8...-Weight, 10...Governor rope, 21...Rail mounting bracket, 23...No. 1 link member, 24... second link member, 26... third link member. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] A link mechanism that supports a tension wheel for applying tension to a rope hung on an elevator governor, wherein one end of a first link member is pin-coupled to a guide rail of an elevator, and the other end is connected to a second link member. The second link member is pin-coupled to one end of the link member, the other end of the second link member is pin-coupled to one end of a third link member, the other end of the third link member is pin-coupled to the guide rail, and the second link member is pin-coupled to one end of the second link member. A tension wheel is installed approximately in the center, and the one end of the first link member is oriented downward at θ with respect to the horizontal plane.
By satisfying the following conditions: θ_1≧0, θ_3<0 or θ_1<0, θ_3≧0, assuming that the third link member is attached at an angle of _1 and the other end of the third link member is attached downward at an angle of θ_3 with respect to the horizontal plane. The length and installation angle of each link member are adjusted so that the horizontal displacement due to the rotation of the first link member and the horizontal displacement due to the rotation of the third link member when the rope is stretched and the tension wheel is lowered cancel each other out. A tension wheel with a set of