JPS6343313B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deviation prevention device for an elevator attached to a structure such as a steel tower.

This type of elevator can be raised and lowered using guide rails installed in parallel along a structure such as a steel tower, and is lifted by rotating a sprocket that engages with a rack installed parallel to the guide rails. In order to prevent the elevator from deviating from the upper end of the guide rail and falling, an automatic stop stopper is installed at the upper end of the guide rail, and the elevator is actuated by this automatic stop stopper and braked via a transmission mechanism. An automatic stop actuation piece is provided for actuating the mechanism.

However, with this kind of deviation prevention mechanism, there are cases where the user forgets to attach the automatic stop stopper or the transmission mechanism does not operate due to some trouble, and there is a risk that the elevator may fall off the top of the guide rail, and an actual falling accident may occur. ing.

The present invention was proposed in view of the above circumstances, and its purpose is to provide a departure prevention device that can reliably stop an elevator.

As shown in FIG. 3, the departure prevention device according to the present invention has a roller at its tip, and is swingably attached to the top of the elevator so that the roller rolls on the side surface of the guide rail 3, and the roller guides the elevator. Detection lever 19 biased to be pressed against the side surface of the rail 3
It is incorporated into the elevator drive mechanism, and the operating lever 1
8. The operation of the detection lever 19 when the downward direction brake 14, the upward direction brake 12, the detection lever 19, the operation lever 18, and the handbrake lever 17 are connected, and there is no guide rail 3, which are operated by the handbrake lever 17. the operating lever 18,
It is comprised of a first and second transmission mechanism 20, 21 that transmits the signal to the handbrake lever 17, an operation lever 18, and switches the handbrake lever 17 to the stop position, and when the automatic stop stopper and the automatic stop actuation piece do not work. Also, the detection lever 19 applies the downward direction brake 14 and the upward direction brake 12 to ensure that the elevator stops.

The present invention will be described above based on an illustrated embodiment. As shown in Fig. 1, the elevator 1 has a total of four wheels 2, one pair on the left and right, and one pair on the top and bottom, and guide rails 3, 3 made of channel steel that are erected in parallel along a structure such as a steel tower. It can be raised and lowered as a guide, and is raised and lowered by rotating a sprocket 5 that meshes with a pin rack 4 provided between guide rails.

As shown in FIG. 2, the drive section of the sprocket 5 includes an engine 6, a belt transmission mechanism 7, a reduction gear 8, a hydraulic speed regulating brake 9, and a braking mechanism 10.

A centrifugal clutch is built into the driving pulley 7A of the belt transmission mechanism 7, and a one-way clutch is built into the driven pulley 7B, and the driving force of the engine 6 is transmitted to the sprocket 5 via the belt transmission mechanism 7 and the speed reducer 8 when ascending. When lowering, the rotation of the sprocket 5 is braked by a hydraulic regulating brake 9 connected to the input shaft 11.

The braking mechanism 10 consists of a pulley brake 12 for the upward direction attached to the pulley 7B and a double brake 14 connected to the input shaft 11 via a one-way clutch 13.

The double brake 14 consists of an inner expansion type brake 15 and a band brake 16.
is hand brake lever 17, band brake 1
6 is operated by an operating lever 18.

In such a braking mechanism 10, the one-way clutch 13 transmits the power of the input shaft 11 to the rotating drum of the dual brake 14 only when it is lowered, and the band brake 16 operates when the operating lever 18 is at the stop position and at the raised position. Released only in the lowered position.

In normal driving operation, when the operating lever 18 is set to the raised position, the throttle lever 33 of the engine 6 is connected to the operating lever 18, so the rotational speed of the engine 6 increases, and the rotation speed of the engine 6 increases. The centrifugal clutch is activated, and the driving force of the engine 6 is transmitted to the sprocket 5 via the belt transmission mechanism 7 and the reducer 8, which is connected to the input shaft 11 of the reducer 8 via the one-way clutch 13. When the one-way clutch 13 is rotatable in the upward direction with the band brake 16 in operation, the elevator 1
will rise. Even if the engine 6 breaks down during ascent and the driving force is lost, the one-way clutch 13
Since the band brake 16 is automatically operated via the , the elevator 1 is stopped safely and reliably.

At the top of the elevator 1, as shown in FIG. The handbrake lever 17 is changed from the release position to the stop position via the second transmission mechanism 21, and the pulley brake 12 is activated.

As shown in FIG. 4A, the detection lever 19 has a roller 22 at its tip.
The base end is pivotally attached to the elevator 1 so as to be able to swing freely so as to roll on the side surface of the elevator.

The first transmission mechanism 20 includes a swing arm 23, a connecting rod 24, a cam member 25, a driven link 26, a connecting shaft 27, a first driving link 28, and a second driving link 29.

The swinging arm 23 is pivotally attached to the elevator 1, the end of a connecting rod 24 is pivoted to the end on the guide rail side, and a roller 23a is attached to the opposite end. The tip of the detection lever 19 and the guide rail side end of the swing arm 23 are connected by a spring member 30, so that the detection lever 19 is biased toward the guide rail, and the connecting rod 24 is biased downward by the spring member 31. ing.

If the guide rail 3 is present, the detection lever 19
The cam portion 19a at the base end of the swing arm contacts the roller 23a of the swing arm, and each member is in a stationary state.However, if there is no guide rail 3, the spring member 30
As a result, the detection lever 19 is tilted forward, the contact state between the cam portion 19a and the roller 23a is released, and the connecting rod 2
4 is moved downward by a predetermined distance by the spring member 31. Here, cam part 1 of the detection lever
The shape of the guide rail 3 is such that it will not operate if the side surface of the guide rail 3 is inclined.

The detection movement of the connecting rod 24 is performed by this connecting rod 2.
The cam member 25 pivotally attached to the four ends is rotated by a predetermined angle, and then the link member 26 fixed to the connection operating shaft 27 is rotated by a predetermined angle.

As shown in FIG. 3, the rotation of the link member 26 is transmitted to the first drive link 28 and the second drive link 29 via the connection operating shaft 27.

The second drive link 29 actuates the locking lever 32 to change the operating lever 18 from the raised position to the stopped position. A throttle lever 33 of the engine 6 is connected to the operating lever 18 so that the engine 6 is in an idling state at the stop position.

An automatic stop actuation piece 35 that is activated by an automatic stop stopper 34 is connected to the connecting rod 24 via a link cam, but even if this automatic stop actuation piece 35 is activated, the cam member 25 will not move. It is configured in such a way that it does not work.

As shown in FIG. 5, the second transmission mechanism 21 includes a connecting rod 36, an operating plate 37, a handbrake locking plate 38,
It consists of a pulley brake lever 39.

A protrusion 40 such as a bolt is provided at the tip of the first drive link 28, and an elongated insertion hole 41 into which the protrusion 40 is inserted is formed at one end of the connecting rod 36. One end of an actuating plate 37 is pivoted to the other end of the connecting rod 36, and the other end of the actuating plate 37 is attached to a fixing member 42.
It is attached to the shaft.

The handbrake locking plate 38 has a substantially J-shaped planar shape, the base end is pivoted to a fixing member (not shown), and the lower tip part and the fixing member 42 are connected to a spring member 43.
The upper part of the tip is connected to the actuating plate 37 and is urged upward so that the upper part of the tip comes into contact with the actuating plate 37.

A locking projection 44 is provided at the center of the handbrake locking plate 38, and the locking projection 44 is inserted into the locking groove 45 of the handbrake lever 17, and in this state, the handbrake lever 17 is in the open position. It is in.

The pulley brake lever 39 has a substantially L-shaped planar shape, and is fixed at a corner to an operating shaft 46 that operates the pulley brake 12. By attaching a spring material 47 to one protrusion, the other protrusion can be used as a handbrake. It is adapted to come into contact with the tip of the lever 17.

When the first drive link 28 is operated in this state, the connecting rod 36 is lowered, the operating plate 37 is rotated downward, and the handbrake locking plate 38 is rotated downward. As a result, the engagement state between the locking protrusion 44 and the locking groove 45 is released, and the handbrake lever 17 is moved from the open position to the stop position by the spring member 48, and is locked at the tip of the handbrake lever 17. The pulley brake lever 39 that had been
7, which causes the pulley brake 12
is activated.

Note that a hand lever interlocking member 49 is attached to the handbrake lever 17 and is activated only when the lever 17 is manually operated, and can be operated by rotating the first drive link 28 and via the second drive link 29. This is to bring the lever 18 to the stop position.

Furthermore, when the hand brake 17 is pulled toward the stop position, the inner expansion brake 15 can be activated via the interlocking member 50.

As mentioned above, the departure prevention device of the present invention detects the absence of a guide rail and switches the operating lever and handbrake lever from the forward tilting operation of the lever to the stop position via the first and second transmission mechanisms, and then switches the downward direction brake. , the lift direction brake is applied, and the engine is placed in an idling state by setting the control lever to the stop position.This makes it possible to reliably stop the ascending elevator even if the automatic stop stopper/operating piece does not work. Deviations are completely prevented.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the elevator, FIG. 2 is a sectional view showing the driving part of the elevator, FIG. 3 is a schematic perspective view showing the deviation prevention device according to the present invention, and FIGS. FIG. 5 is a front view showing the first transmission mechanism of FIG. 3, and FIG. 5 is a front view of the second transmission mechanism of FIG. 1... Elevator, 2... Wheels, 3... Guide rail,
4...Pin rack, 5...Sprocket, 6...
Engine, 7... Belt transmission mechanism, 7A... Driving pulley, 7B... Driven pulley, 8... Reduction gear, 9... Hydraulic speed regulating brake, 10... Braking mechanism, 11... Input shaft, 12 ...Pulley brake for ascending direction, 13...One-way clutch, 14...Double type brake, 15...Inner expansion type brake, 16...
... band brake, 17 ... hand brake lever, 18 ... operation lever, 19 ... detection lever,
19a...Cam portion, 20...First transmission mechanism, 21
... Second transmission mechanism, 22 ... Roller, 23 ... Swinging arm, 23a ... Roller, 24 ... Connection rod, 25 ... Cam member, 26 ... Followed link, 2
7...Connection operating shaft, 28...First drive link, 2
9... Second drive link, 30... Spring member, 31
... Spring member, 32 ... Locking lever, 33 ... Throttle lever, 34 ... Automatic stop stopper,
35... Automatic stop actuating piece, 36... Connection rod, 3
7... Operating plate, 38... Hand brake locking plate,
39...Pulley brake lever, 40...Protrusion,
41... Insertion long hole, 42... Fixing member, 43...
Spring member, 44...Latching protrusion, 45...Latching groove,
46... Operating shaft, 47... Spring member, 48... Spring member, 49... Hand lever interlocking member, 50...
...Interlocking parts.

Claims (1)

[Scope of Claims] 1. In an elevator of the type that can be raised and lowered using a guide rail as a guide, and is raised by rotating a sprocket that engages with a rack set upright along the guide rail by a drive mechanism, the elevator has a roller at the tip. a detection lever which is attached to the upper part of the elevator so as to be swingable so that the roller rolls on the side surface of the guide rail, and which is biased so that the roller is pressed against the side surface of the guide rail; and a detection lever incorporated in the drive mechanism. , an operating lever, a descending brake and an ascending brake operated by a handbrake lever, and the detection lever, the operating lever, and the handbrake lever are connected, and the operation of the detection lever when there is no guide rail is controlled by the operating lever, A departure prevention device for an elevator, comprising a first and second transmission mechanism that transmits a signal to a handbrake lever and switches the operating lever and the handbrake lever to a stop position.