JPS62290614A - Lifting carriage emergency stopping device for crane - Google Patents

Abstract

PURPOSE:To reduce the number of detectors as well as the number of wiring systems, by installing an up high-speed cutting detector, an emergency stopping detector and a down high-speed cutting detector in order in a lifting carriage additionally. CONSTITUTION:When a lifting carriage 8 goes down beyond a position corresponding to a detected plate 25 at a lowermost position by trouble, a down high-speed cutting detector 18 and an emergency stopping detector 17 are operated in this order by the attachment 24 additionally installed in and around the lower end of a post 6. And, first a lowering speed of the lifting carriage 8 is automatically selected to the low speed, and a motor is stopped afterward and simultaneously a brake is operated, applying an emergency stop to the lifting carriage 8. And, when the lifting carriage 8 goes up beyond a position corresponding to the detected plate 25 at an uppermost position, it is operated by an attachment 23, and the emergency stop is applied likewise.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention provides an emergency system for a lifting carriage of an entry/exit lane used in an automated warehouse, etc., at both the upper and lower ends of the lifting path. This relates to a device for stopping the vehicle.

(Prior Art and its Problems) In order to make an emergency stop of a lifting carriage at both ends of its lifting path, a detector for high-speed canting when the carriage reaches just before the end of the lifting path; An emergency stop detector is used to stop the lifting carriage that has been canted at high speed by the detection operation of the detector at the end of the lifting path.

In the conventional emergency stop device for this type of elevator carrier, a detector for high-speed lifting and a detector for emergency stop are attached to a position corresponding to the upper end of the carriage elevator path on a post installed beside the elevator elevator path. , a descending high-speed cut detector and an emergency stop detector are attached to the post at a location corresponding to the lower end of the carry range ascending and descending route, and the above-mentioned respective detectors are attached to the ascending and descending carry range when the end of the ascending and descending route is reached. It was equipped with an attachment to activate it. Such conventional emergency stop 'A'lZ requires a total of four detectors and four systems of wiring, resulting in high cost.

(Means for Solving the Problems) The present invention proposes an emergency stop device for a lifting carriage of a crane that can solve the conventional problems as described above. A detector for high-speed ascending cut, a detector for emergency stop, and a detector for high-speed descending cut are installed in this order from above. Attached is an attachment that sequentially activates the detector for high-speed upward cut and the detector for emergency stop, and also includes an attachment that sequentially activates the detector for high-speed downward cut and the emergency stop detector at position 1 near the bottom edge. That's the point.

(Embodiment) An embodiment of the present invention will be described below based on the attached illustrative drawings. In FIG. 1, 1 is guided by a floor guide rail 2 and a ceiling guide rail 3 to keep a constant This is a lane for entering and exiting the warehouse along the route, and includes a pair of front and rear posts 6 erected between the lower frame 4 and the upper frame 5.
7 is provided with an elevating carriage 8 that is supported so as to be movable up and down.

Reference numeral 9 denotes a pair of front and rear side frames 10a of the elevating carriage 8.

An elevating guide roller is pivotally supported by 10b so as to sandwich the post 6.7, and 11 is a load transfer means such as a running fork mounted on the elevating carriage 8. 1
Reference numeral 2 denotes a carriage drive means, which includes a pair of chains 713a, 13b stretched in a loop shape along the carriage elevating path with both ends locked to the elevating carriage 8.
A drive gear wheel 14 that rotates both chains 13a and 13b.
, and a motor 15 that drives the drive gear 14.

As shown in FIGS. 2 to 5, one of the side frames 10a and 10b of the lifting range has a detector 16 for high-speed ascending cut, a detector 17 for emergency stop, and a high-speed descending cut detector 16. The detectors 18 are mounted in a vertical line in this order from above via a detector mounting case 19. Each of the detectors 16 to 18 is provided with operating levers 16a to 18a that swing up and down as shown in FIG. 5, or a Mitsutwitch is used. Further, in the detector mounting case 19, a load scooping position detector 20 and a counting detector 2 are installed at positions laterally apart from the detectors 16 to 180 rows.
1 and an unloading position detector 22 are installed in a vertical line in this order from the top. Each of these detectors 20 to 22
In this method, a type of detector is used that optically or magnetically detects the detection target plate without contact.

The post 6 adjacent to the side frame 10a of the lifting/lowering range is provided with the rising high-speed cutting detector 1 at a position near the upper end.
6 and the emergency stop detector 17 are attached, and the descending high-speed cut detector 18 and the emergency stop detector 1 are attached at a position near the lower end.
An attachment 24 is attached to sequentially operate 7 and 7.
Furthermore, a detection plate 25 is attached which activates each of the detectors 20 to 22 at each stop level of the elevating and lowering carriage 8. A protrusion 25a is formed at the center of the detection plate 25 in the longitudinal direction, and the cargo scooping position detector 20 and the unloading position detector 22 are positioned so as to detect only the protrusion 25a, The counting detector 21 is positioned so as to detect the entire length of the detection plate 25 excluding the protrusion 25a.

In the crane 1 configured as described above, the drive gear 1 is driven by the motor 15 in the range drive means 12.
4 to rotate the cheques 713a and 13b, the elevating and lowering carriage 8 can be moved up and down. Then, after the count value of the number of times the counting detector 21 detects the detected plate 25 matches the set value, when the cargo scooping position detector 20 detects the protrusion 25a of the detected plate 25 (during unloading work) Alternatively, when the unloading position detector 22 detects the protrusion 25a of the detected plate 25 (during storage work), the brake is activated at the same time as the motor 15 is stopped, and the lifting gear range 8 is stopped at a predetermined level.

The elevating and lowering carriage 8 is controlled by the above control so that the position corresponding to the detected plate 25 at the highest position and the detected plate +Ii, 25 at the lowest position are adjusted.
For control reasons, the carriage 8 stops at the position corresponding to the lowest position and does not move up or down beyond these highest and lowest positions. When descending beyond the corresponding position,
As shown in FIG. 5, the descending high-speed cut detector 18 and the emergency stop detector 17 are activated in this order by the attachment 24 attached to the position near the lower end of the post 6. First, the descending high-speed cut detector 18 is operated in this order. 18, even if the descending speed of the lifting carriage 8 is high, it is automatically switched to a low speed, and then the emergency stop detector 17 is activated.
When the motor 15 is operated, the motor 15 is stopped, and at the same time, the brake is operated and the elevating carriage 8 is brought to an emergency stop. Furthermore, when the elevating carriage 8 rises beyond the position corresponding to the highest detection target plate 25,
Detector 1 for high-speed cutting elevated by attachment 23
6 and the emergency stop detector 17 are activated in this order, and the elevating carriage 8 is brought to an emergency stop in the same manner as the emergency stop action during descent.

(Operations and Effects of the Invention) As described above, according to the crane elevating carriage emergency stop device of the present invention, the elevating carriage is operated in the same way as the conventional device with four detectors attached to the post side. Although it is capable of high-speed cutting and emergency stop in the event of an emergency that has moved to the upper or lower end of the lifting path, it is only necessary to install three detectors on the lifting carriage side. The number of wires and the number of wiring systems are reduced, and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of the entire crane, FIG. 2 is a cross-sectional plan view of the main parts, FIG. 3 is a side view of the same, and FIGS. 4 and 5 are schematic front views of the same. 1... Lane for entering and exiting the warehouse, 6, 7... Post,
8... Elevating carriage, 12... Carry height drive means, 16... Ascent high speed cut angle detector, 17... Emergency stop detector, 18... Descending high speed cut detector,
23.24... Attachment for operating the detector. Figure 1

Claims (1)

[Claims] A high-speed ascending cut detector, an emergency stop detector, and a descending high-speed cut detector are installed in this order from above on the lifting carriage of the crane. An attachment is provided that sequentially activates the high-speed rising cut detector and the emergency stop detector at a nearby position, and sequentially activates the low-speed high-speed cut detector and the emergency stop detector at a position near the lower end. An emergency stop device for a crane's elevating carriage, which is equipped with an attachment.