JPH0712898B2 - Tension car - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensioning wheel supporting structure for applying tension to a rope that is applied to a speed governor that operates an elevator safety device.

[Prior art]

FIG. 3 shows a conventional structure for supporting a tension vehicle, for example, Japanese Patent Laid-Open No.
It is disclosed in 61-238684 and the like. This support structure is a link type, and one end of a tensioning vehicle arm 2 which is a link member is pin-connected to the guide rail 1 of the elevator, and the tensioning wheel 3 is attached to the other end.
Is attached. That is, the rail mounting bracket 4 is mounted on the guide rail 1 of the elevator with the mounting bolts 5, and one end of the tensioning vehicle arm 2 is pin-coupled to the rail mounting bracket 4.
Has been done. The tension wheel 3 is attached to the other end of the tension wheel arm 2, and at the same time, a weight 8 is suspended via a weight suspension plate 7. The tension wheel 3 and the weight hanging plate 7 are both attached around the shaft 9. The governor rope 10 that is hung on the elevator governor is wound around the tension vehicle 3. Weight 8 by link type support structure
Always gives the governor rope 10 a certain amount of tension. That is, when the governor rope 10 extends, the tension vehicle 3
The weight 8 is lowered by the action of the weight 8, and the tensioning arm 2 supporting the tensioning wheel 3 rotates around the pin coupling 6.

[Problems to be Solved by the Invention]

When the governor rope 10 extends and the tensioning wheel 3 lowers, the tensioning arm 2, which is a link member, pivots around the pin connection 6, so that the tensioning arm 2 is gradually tensioned even if the tensioning arm 2 is initially set horizontally. The car arm 2 tilted and the governor rope 10 approached the rail 1. As a result, there has been a problem that the position of the lever pin of the emergency stop device, which is a safety device, and the position of the governor rope (hereinafter simply referred to as the rope) 10 are displaced. The present invention provides a tension vehicle having a support structure capable of always maintaining a constant distance from the rail when the rope extends and the tension vehicle descends even if the link type support structure is used. To aim.

[Means for Solving the Problems]

The tension wheel of the present invention is supported by a link mechanism composed of three link members instead of the conventional one link member. That is, the tension wheel of the present invention is a link mechanism that supports the tension wheel for applying tension to the rope that is hung on the elevator governor, and one end of the first link member is pin-connected to the guide rail of the elevator and the other end is The second link member is pin-coupled to one end, the other end of the second link member is pin-coupled to one end of the third link member, and the other end of the third link member is pin-coupled to the guide rail. Of the first link member is attached downward at an angle of θ ₁ with respect to the horizontal plane, and the other end of the third link member is attached downward at an angle of θ ₃ with respect to the horizontal plane. By satisfying the condition of θ ₁ ≧ 0, θ ₃ <0 or θ ₁ <0, θ ₃ ≧ 0, the rotation of the first link member when the rope stretches and the tension wheel descends horizontal direction Position and a tension pulley having a link mechanism that defines the length and mounting angle of each link member so that the horizontal displacement by rotation of the third link member is canceled.

[Action]

Mounting angles θ ₁ and θ _{3 of} the first link member and the third link member
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 represented, for example, at both ends of the second link member, but if one end of the second link member is displaced to the right, for example, the other end is displaced to the left, thereby attaching to the second link member. The horizontal displacement of the attached tensioning wheel can be almost zero.

【Example】

An embodiment of the tension wheel of the present invention will be described with reference to FIGS. 1 and 2. The same parts as those in FIG. 3 showing the conventional example are designated by the same reference numerals and the description thereof will be omitted. Two rail mounting brackets 4 and 21 are attached to the guide rail 1 of the elevator in the vertical direction by mounting bolts 5 and 22, respectively. One end of the first link member 23 is pin-coupled 6 to the upper mounting member 4. One end of the second link member 24 is pin-coupled 25 to the other end of the first link member 23. One end of the third link member 26 is pin-coupled to the other end of the second link member 24.
27. The other end of the third link member 26 is pin coupled 28 to the lower mounting member 21. The tension wheel 3 is attached to the center of the second link member 24. A weight 8 is hung at the center through a weight hanging plate 7 as in the conventional case. When first installing the above link mechanism, the first link member
23 is mounted horizontally (θ ₁ = 0) and is the second link member
24 is mounted vertically, and the third link member 26 has a pin coupling 28 to the guide rail 1 and an end of the third link member 26 has an angle upward with respect to the horizontal plane.
It is attached at θ ₃ . Next, FIG. 2 shows a state in which the rope 10 extends and the tension wheel 3 descends. At this time, the first link member 23 rotates and the other end is displaced horizontally to the right. Also, one end of the third link member 26 is displaced leftward in the horizontal direction by the rotation of the third link member 26. At the same time, this 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 have the same magnitude. The lengths of the first, second, and third link members are l ₁ , l ₂ , and l ₃ , and the angle of the first link member with respect to the horizontal plane after rotation is α ₁ as shown in the figure, and the guide for the first tension wheel The horizontal distance from the rail 1 is X ₀ , the horizontal distance from the guide rail 1 at the other end of the first link member after the rope is extended is X _1, and the horizontal distance from the guide rail 1 at one end of the third link member is Directional distance x ₂
Then, X ₀ = l ₁ ... X ₁ = l ₁ cos α ₁ ... X ₂ = l ₃ ... At this time, in order to prevent the horizontal distance of the tension vehicle 3 from changing even after the rope is stretched, Must be met. Therefore, substituting the above equation into this equation, Becomes That is, assuming that the angle of α ₁ at which the rope extends from the state shown in FIG. 1 and the first link member rotates is given, if l ₁ and l ₃ are determined so as to satisfy the expression, The directional position will be maintained. At this time θ ₁
= 0, and θ ₃ is automatically determined by determining l ₁ and l ₂ . In the above embodiments, the description has been made on the assumption that each link member is set in the state shown in FIG. 1 and that the rope is changed 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 possible.
This will be described with reference to FIG. That is, in the figure, (A) shows the above-mentioned embodiment, but it is also possible to define other embodiments as shown in (B) and (C). (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 ₁ with respect to the horizontal plane, and the second link member 24 is attached obliquely instead of vertically. However, even when the rope indicated by the chain line is extended, the horizontal displacement of the tension wheel (indicated by the shaft 9) is almost zero. In (C), the first link member 23 is attached at an upward angle (−θ ₁ ) with respect to the horizontal plane. Similarly, the third link member is also attached at a downward angle θ ₃ . Also in this embodiment of (C), the horizontal displacement of the tension wheel can be zero. The following can be said through these (A), (B) and (C). That is, in order to cancel the horizontal displacement of both ends of the second link member and make the horizontal displacement of the tensioning wheel zero,
One end of the first link member 23 that is pin-coupled to the guide rail 1 is attached downward at an angle of θ _{1 with} respect to the horizontal plane, and the other end of the third link member 26 that is pin-coupled to the guide rail 1 is a horizontal plane. as it is mounted at an angle of _{θ 3, θ 1 ≧ 0,} θ 3 <0 or, θ ₁ <0, there prerequisites in θ ₃ ≧ 0. That is, since the link member attached downward is displaced to the right by the rotation and the link member attached upward is displaced leftward in the horizontal direction, the first link member and the third link member are vertically moved with respect to the horizontal plane. Needs to be installed upside down. As long as this condition is satisfied, it is considered that there are an infinite number of combinations of the lengths l ₁ , l ₂ , l _{3 of the} link members and the mounting angles θ ₁ , θ ₃ .

【The invention's effect】

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 horizontal displacement of the tension wheel attached to the second link member is prevented. It can be zero. Therefore, it is possible to prevent the rope from coming too close to the guide rail of the elevator.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of this tension vehicle, FIG. 2 is a view showing the operation of FIG. 1, FIG. 3 is a side view showing a conventional device, and FIGS. 4 (A) and 4 (B). (C) is a schematic side view which shows another Example, respectively. 2 ... Tension car arm (link member), 3 ... Tension car, 1 ...
Elevator guide rails, 4 ... Rail mounting brackets, 5
...... Mounting bolt, 6 ...... Pin connection, 7 ...... Weight hanging plate, 8 ...... Weight, 10 ...... Governor rope, 21 ...... Rail mounting bracket, 23 ...... First link member, 24 ...... Second Link member, 26 ... 3rd link member. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A link mechanism for supporting a tensioning wheel for applying tension to a rope applied to an elevator governor, wherein one end of a first link member is pin-connected to a guide rail of the elevator and the other end is a second link. One end of the member is pin-coupled, the other end of the second link member is pin-coupled to one end of the third link member, and the other end of the third link member is pin-coupled to the guide rail. A tension wheel is attached to the center, the one end of the first link member is attached downward at an angle of θ ₁ with respect to the horizontal plane, and the other end of the third link member is attached downward at an angle of θ ₃ with respect to the horizontal plane. By satisfying the condition of θ ₁ ≧ 0, θ ₃ <0 or θ ₁ <0, θ ₃ ≧ 0, the horizontal displacement of the first link member due to the rotation of the first link member when the rope is extended and the tension wheel is lowered. And the third Tension pulley which defines the length and mounting angle of each link member so that the horizontal displacement caused by the rotation of the click member is canceled.