JPH0318578A - Buffering device for elevator - Google Patents

Abstract

PURPOSE:To constitute the whole of the device in simple form from a small quantity of parts by joining a switch supported in the lower part of an elevator passage and the plunger of a buffering machine by a switch operating member consisting of a soft string-shaped member and allowing plural kinds of buffering machines to be treated by a common switch member. CONSTITUTION:A hydraulic buffering machine 5 is constituted of a cylinder 6 erected on a base plate 4 and a plunger 7 which is installed so as to be raised and lowered, and one edge of a switch operating member 18 consisting of a string-shaped member having softness is connected with the upper edge of the plunger 7 through a string laying part 15, and the other edge is joined with the operating element 17a of a switch 17. When the buffering machine 5 does not operate in the normal state, the switch 17 is held in the nonoperation state by the tension of the switch operating member 5 consisting of the solt string- shaped member, and when the buffering machine 5 operates because of the abnormal traveling, the switch operating member 18 is loosened, accompanied with the lowering of the plunger 7, and the switch 17 is operated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an elevator shock absorbing device that safely decelerates and stops a car in the event of an abnormality in which the car travels below the lowest floor due to a malfunction or the like. In particular, the present invention relates to an elevator shock absorber equipped with a switch that detects the abnormal running and stops the operation of the elevator.

[Prior art] As a conventional shock absorber for this type of elevator, the
One example is the technology published in Japanese Patent No. 1-4749.

Fig. 4 is a front view showing the conventional elevator shock absorbing device in a non-operating state, Fig. 5 is a sectional view taken along line A-A in Fig. 4, and Fig. 6 is a front view showing the conventional elevator shock absorbing device in an operating state. FIG.

In the figure, (1) is an elevator hoistway, (2) is a pit provided at the bottom of the hoistway (1), (3) is a car or counterweight that is raised and lowered in the hoistway (1), and ( 4) is a plywood fixed to the pit (2), (5) is a hydraulic shock absorber installed on the plywood (4), (6) is the cylinder of the shock absorber (5), and (7) is a basket. Alternatively, it is a plunger housed in a cylinder (6) so as to be movable up and down so as to be actuated by a counterweight (3).

(8) is a bracket attached to the upper end of the plunger (7), (9) is a guide attached to the cylinder (6), and (10) has an upper end fixed to the bracket (8) and a lower part A cam rod is loosely inserted into the guide (9), (11) is a mounting plate attached to the cylinder (6), and (12) is a switch mounted on the mounting plate (11). In addition, the fourth
(R) shown in the figure is the interval set between the lower end of the car or counterweight (3) stopped at the lowest floor and the upper end of the plunger (7), and is commonly called run-by.

Next, the operation of the conventional elevator shock absorber constructed as described above will be explained.

During normal operation when the car or counterweight (3) stops at the lowest floor, the car or counterweight (3) stops as shown in Figure 4.
) and the plunger (7) with a predetermined distance of run-by (R
) is ensured, so the buffer (5) does not operate.

On the other hand, due to some reason such as a breakdown, the car or counterweight (
3) does not stop at the lowest floor and travels further downward beyond the run-by (R) area, as shown in Figure 6, the shock absorber (5) is moved by the car or counterweight (3). The plunger (7) is compressed downward, and the shock absorber (7) is compressed downward.
5) The hydraulic damping action of the cage or counterweight (3)
is safely slowed down to a stop. At this time, the plunger (
7) The cam rod (10) is lowered at the same time as the cam rod (10).
), the switch (12) operates. Then, the elevator control panel (not shown) stops the operation of the elevator based on the signal from the switch (12).

[Problem to be solved by the invention] By the way, the size or length of the shock absorber (5) is usually
Because it is determined by the elevator specifications, including the speed and capacity of the car or counterweight (3), its buffer (5)
) of course also differs depending on the elevator standard. However, since the conventional elevator shock absorbing device is configured to operate the switch (12) by the cam rod (10) as described above, the cam rod (10) shown by (K) in FIG. The length of the buffer (5
) needs to be changed accordingly. For this reason, it is necessary to prepare a large number of cam rods (10) of different lengths, which not only complicates parts management but is also uneconomical.

Furthermore, when the cam rod (10) is used, it is necessary to provide a guide (9) to guide it, and this guide (
9) and the cam rod (10). Moreover, in order to avoid interference between the cam rod (10) and other equipment, a relatively large space is required in the movement area of the cam rod (10), which is wasteful.

SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator shock absorbing device that can be used with multiple types of shock absorbers with a common switch operating member, that can easily configure the entire device with a small number of parts, and that can effectively utilize the space around the shock absorbers. Our goal is to provide the following.

[Means for Solving the Problems] An elevator shock absorbing device according to the present invention includes a cylinder in which a shock absorber is installed at the bottom of a hoistway and a plunger provided in the cylinder so as to be able to rise and fall, and a switch is installed in a lower part of a hoistway. The switch is supported on a fixed support located at the bottom of the shock absorber, and the switch and the plunger of the shock absorber are connected by a switch actuating member made of a flexible string-like material.

[Function] In the elevator shock absorbing device of the present invention, when the car or the counterweight stops at the normal position and the shock absorber does not operate, the switch is deactivated by the tension of the switch actuating member made of a flexible string-like material. kept in working condition. Also,
When the car or the counterweight travels abnormally and the shock absorber is activated, the switch actuating member is loosened as the plunger is lowered, and the switch is activated.

If the buffer strokes of shock absorbers are different, by connecting a switch actuation member between the plunger and the switch with a length that matches the length, a common switch actuation member can be used for multiple types of shock absorbers. . Further, since there is no need for any part that guides the switch actuating member midway, the entire device can be constructed easily. Furthermore, since the switch actuating member is made of a thin string-like material, the space around the shock absorber can be used effectively.

[Example] Hereinafter, an example that embodies the present invention will be described based on the drawings.

FIG. 1 is a front view showing an elevator shock absorbing device according to an embodiment of the present invention in a non-operating state, and FIG. 2 is a front view showing the elevator shock absorbing device of FIG. 1 in an operating state. Note that in the drawings, the same reference numerals and symbols as in the conventional example indicate the same constituent parts as in the conventional example, and redundant explanation will be omitted here.

In the figure, (5) is a hydraulic shock absorber, and plywood (4
), and a plunger (7) that is movable up and down on the cylinder (6) and is actuated by a cage or a counterweight (3). (14) is a bracket attached to the upper end of the plunger (7), and (15) is a string hanging portion fixed to the lower surface of the bracket (14).

(16) is a mounting arm that is attached to the cylinder (6) with a nut (16a) so that its position can be adjusted up and down;
7) is a switch mounted on the mounting arm (16). The actuator (17a) of this switch (17) is always urged downward by a spring (not shown).

(18) is a switch actuating member made of a flexible string-like material such as a wire rope or a cloth string, and one end thereof is connected to the upper end of the plunger (7) via the string hanging portion (15). , the other end is coupled to the actuator (17a) of the switch (17).

Next, the operation of the elevator shock absorbing device of this embodiment configured as described above will be explained.

During normal operation when the car or counterweight (3) stops at the lowest floor, the car or counterweight (3) stops as shown in Figure 1.
) and the plunger (7) with a predetermined distance of run-by (R
) is ensured, so the buffer (5) does not operate. Therefore, in this state, the plunger (7) protrudes upward.
) extends the switch actuating member (18), whose tension holds the switch (17) in an inoperative state.

On the other hand, due to some reason such as a breakdown, the car or counterweight (
3) does not stop at the lowest floor and travels further downward beyond the run-by (R) area, as shown in Figure 2, the shock absorber (5) is moved by the car or counterweight (3). The plunger (7) is compressed downward, and the shock absorber (7) is compressed downward.
5) The hydraulic damping action of the cage or counterweight (3)
is safely slowed down to a stop.

At this time, the switch actuating member (18) loosens as the plunger (7) descends, and the actuator (1) of the switch (17)
7a) is rotated downward by the biasing force of the spring, and the switch (17) is operated. Then this switch (17
), the elevator control panel (not shown) stops the elevator.

As described above, in the elevator shock absorbing device of this embodiment, the shock absorber (5) can be raised and lowered to and from the cylinder (6) installed in the pit (2) at the bottom of the hoistway (1). A switch (17) is supported via a mounting arm (16) serving as a fixed support part so that its position can be adjusted up and down with respect to the cylinder (6), and the switch (17) is 17) and the plunger of the buffer (5) (
7) and a switch actuating member (18) made of a flexible string-like material.
).

Therefore, according to the elevator shock absorbing device of the above embodiment, when the shock absorber (5) does not operate due to a normal stop,
The switch (17) is held in a non-operating state by the tension of the switch actuating member (5) made of a flexible string-like material, and if the shock absorber (5) is activated due to abnormal running,
As the plunger (7) descends, the switch actuating member (18)
) is loosened to operate the switch (17).

In addition, if the buffer stroke of the shock absorber (5) is different, the switch actuating member (18) can be adjusted to a length that matches the buffer stroke.
If this is coupled between the plunger (7) and the switch (17), a common switch operating member (18) can be used for multiple types of shock absorbers (5). In this case, if the connection position of the switch actuating member (18) to the string running part (15) is changed or the vertical position of the mounting arm (16) to the cylinder (6) is changed, the switch actuating member (18) The length can be easily adjusted.

Furthermore, according to the above embodiment, the switch actuation member (18)
Since there is no need for parts to guide the device along the way, the entire device can be configured easily. Moreover, since the switch actuating member (18) is made of a thin string-like material, the space around the shock absorber (5) can be used effectively.

In addition, in the above embodiment, the switch (17) is supported by the cylinder (6) via the mounting arm (16).
The present invention is not limited to this, but the switch (1
7) can be supported on a suitable fixed support located at the bottom of the hoistway (1). An example is shown in Figure 3.

FIG. 3 is a front view of another embodiment of an elevator shock absorbing device according to the present invention.

In this alternative embodiment, the switch (17) is made of plywood (
4) It is mounted on the top so that its position can be adjusted.

Moreover, a pulley (19) is installed on the plywood (4). Then, a switch actuating member (
18) is coupled between the plunger (7) and the switch (17) via the pulley (one). With this structure as well, the same effects as those of the above embodiment can be obtained.

[Effects of the Invention] As described above, the elevator river shock absorbing device of the present invention includes a cylinder in which the shock absorber is installed at the lower part of the hoistway, and a plunger that is provided in the cylinder so as to be able to rise and fall, and the switch is installed in the lower part of the hoistway. The switch is supported on a fixed support located at the bottom of the buffer, and the switch and the plunger of the shock absorber are connected by a switch actuating member made of a flexible string-like material, so if the buffer stroke of the shock absorber is different, If a switch actuation member is connected between the plunger and the switch with a length that matches the length, a common switch actuation member can be used for multiple types of shock absorbers, and there is no need for parts to guide the switch actuation member midway. Therefore, the entire device can be easily constructed, and since the switch operating member is made of a thin string-like material, the space around the shock absorber can be effectively utilized.

[Brief explanation of drawings]

FIG. 1 is a front view showing an elevator shock absorbing device according to an embodiment of the present invention in a non-operating state, FIG. 2 is a front view showing the elevator shock absorbing device of FIG. 1 in an operating state, and FIG. 3 is a front view showing the elevator shock absorbing device according to the present invention FIG. 4 is a front view showing the conventional elevator shock absorber in an inoperative state, FIG. 5 is a sectional view taken along the line A-A in FIG. 4, and FIG. This figure is a front view showing the elevator shock absorbing device of FIG. 4 in an operating state. In the figure, 1: Hoistway 3: Car or counterweight 5: Buffer 6: Cylinder 7: Plunger 17: Switch 18: Switch operating member. Note that in the drawings, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] A shock absorber having a plunger that is movable up and down in a cylinder installed at the lower part of the hoistway of an elevator; a switch supported by a fixed support section located at the lower part of the hoistway; and a switch actuating member made of a flexible string-like material, the other end of which is connected to the switch, the other end of which is coupled to the plunger of the buffer, and which operates the switch when the plunger is lowered. Device.