JP2696599B2 - Conveyor cart with suspended equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention is provided with a transferred object hanging device in which a transferred object hanging device is hung up and down by a belt which is wound and fed by a belt winding drum. The present invention relates to a transport trolley.

(Conventional technology and its problems) In this type of conventional transport vehicle, for example, Japanese Unexamined Patent Application Publication No.
As described in Japanese Patent Publication No. 5 (1994), four corners of a device for suspending an object to be conveyed are suspended by four belts which can be wound up and extended. In such a conventional configuration, it is difficult to equally apply tension to each of the four belts, and it is difficult for any one of the belts to loosen and move up and down stably. Of course, a structure in which the belt is hung by two belts has been considered, but a special and expensive wide belt is required to suppress the roll, which is not practical.

Moreover, in the case of the four-point suspension, in order to detect the slack of the suspension belt and to automatically stop the lifting and lowering when an abnormal situation such as the transported object suspension device to be lowered is caught or climbed on another object occurs. In the case where the necessary belt slack detecting means is provided, any one of the four belts may become slack even during normal up / down driving as described above. It is necessary to configure a control system so that the belt slack detection signal is output only when both of the two slack detecting means are in the slack detection state, which increases the cost. Not only that, there was also a great risk of malfunction.

(Means for Solving the Problems) An object of the present invention is to provide a transport trolley with an object-to-be-conveyed hanging device capable of solving the above-mentioned conventional problems. In this embodiment, three suspending belts are attached to the carrier 1.
13a and 13b15, a transporting trolley with a transported object suspending device which suspends the transported object suspending device 9 so as to be able to move up and down and has a belt slack detecting means (limit switch 24). 13a and 13b15 are arranged side by side in the left-right and horizontal directions on the upper and lower sides of the upper end of the lifting / lowering path of the conveyed object suspending device 9, and are arranged side by side in the axial direction of the belt winding drum 11 that can be driven forward and reverse. Three winding units 12
a to 12c extending from each of the winding portions 12a, 12
The two suspension belts 13a and 13b extending from b are turned downward by a belt guide (pulleys 14a and 14b), and the two suspension belts 13a and 13b are provided at the front and rear ends of the transported object suspension device 9. The two suspension belts 15 suspended from the left and right sides of the end on the side where the belt take-up drum 11 is located, and one suspension belt 15 extending from the central take-up section are provided with belt guides (pulleys 16a, 16
After the upper end of the lifting / lowering path of the object-to-be-conveyed hanging device 9 is turned downward through the front-rear direction via b), one center of the other end of the object-to-be-conveyed hanging device 9 is hung. The belt slack detecting means (limit switch 24) detects the slack of one hanging belt 15 extending from the central winding portion 12c, and the belt slack detecting device 9 serves to
Is arranged adjacent to a belt portion straddling the upper end of the ascending / descending path in the front-rear direction.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a transport trolley,
It is movably suspended by a single guide rail 4 installed on the ceiling side via a driving trolley 2 and a driven trolley 3. The drive trolley 2 is provided with drive wheels 6 driven to rotate by a motor 5, and the driven trolley 3 is provided with a current collection unit 8 that slides on a power supply rail 7 laid on a side surface of the guide rail 4. ing.

Reference numeral 9 denotes an object-to-be-conveyed hanging device, which includes a pair of left and right hangers 10a and 10b that open and close in a left-right direction.

As shown in FIG. 1, FIG. 3 and FIG. 4, one belt wrapping is provided on one side of the upper end of the lifting path of the transporting object hanging device 9 at the front end of the transport trolley 1 in the horizontal direction. The taking drum 11 is built in. This belt winding drum
11 is provided with a total of three winding portions 12a to 12c, both ends in the axial direction and a central portion. Two winding parts at both ends
Two suspension belts 13a and 13b wound around 12a and 12b
Is turned downward by belt guide pulleys 14a and 14b that are supported by the transport trolley 1 approaching the drum 11,
One suspension belt 15 wound around the winding portion 12c at the center of the inside is moved upward and downward by the two belt guide pulleys 16a and 16b, which are pivotally supported by the carriage 1, at the upper end of the lifting and lowering path of the object suspension device 9. Are conveyed downward at the rear end side of the carrier 1 so as to straddle in the front-rear direction.

Thus, the outer two suspension belts 13a, 13b are provided at two positions on both left and right ends of the front end of the transported object suspension device 9.
The lower end of a single hanging belt 15 at the center of the rear end of the conveyed object hanging device 9 in the width direction is connected to the lower end of the hanging belt 15 via a connecting fitting 18. The conveyed object suspending device 9 is suspended in a horizontal posture in a state where the suspending belts 13a, 13b, and 15 are suspended in parallel with each other.

In addition, the belt guide pulleys 14a, 14b, and 16a can be replaced with a plurality of guide rollers that are arranged in an arc along the moving path of the hanging belt. It can also be composed of an arc-shaped plate. Further, when the transported object suspending device 9 is lifted up to the ascending limit position, a guide for positioning the transported object suspending device 9 to prevent front-back, left-right, and side-to-side swinging may be provided.

The belt winding drum 11 is provided in the Japanese Patent Laid-Open No. 2-1145.
Fixed shaft 1 as conventionally known from No. 5
The drum 11 is supported by the bearings 9a and 19b and the bearings 20a and 20b, and has a built-in motor with a brake for driving the drum 11 to rotate forward and reverse and a speed reducer. A gear 21 is provided concentrically on the drum 11 and drives a control pulse encoder 23 via a gear 22 that meshes with the gear 21.

At the intermediate position between the pair of front and rear belt guide pulleys 16a and 16b for guiding the center suspension belt 15, that is, at the belt portion that straddles the upper end of the lifting path of the transported object suspension device 9 in the front-rear direction, the suspension is provided. A belt slack detection limit switch 24 is provided adjacent to the actuator 24a, which is pressed down by the hanging belt 15 when the hanging belt 15 is relaxed. 25 is the belt guide pulley 14
a, 14b, a gear 22, and a left and right lateral frame that supports the pulse encoder 23. Reference numeral 26 denotes the belt guide pulleys 16a, 16b and the belt slack detection limit switch 2.
This is a front-back frame that supports 4. Bearings 27a and 27b for attaching the driving trolley 2 and the driven trolley 3 so as to be relatively rotatable about a vertical axis are attached to the front-rear frame 26.

The transport trolley 1 supplies power to the motor 5 from the power supply rail 7 via the current collecting unit 8 and a control device mounted on the transport trolley 1 to rotate the drive wheels 6 of the drive trolley 2 so that the guide rail 4 is driven. The vehicle can be driven to travel forward or backward. Thus, the carrier 1
In a stopped state or during traveling, power is supplied from the power supply rail 7 to the motor with a brake incorporated in the belt winding drum 11 via the power collection unit 8 and the control device mounted on the transport vehicle 1. The motor can rotate the belt winding drum 11 at a predetermined speed in the belt feeding direction or the belt winding direction.

When the drum 11 rotates in the belt feeding direction, 3
The three suspension belts 13a, 13b, and 15 wound around the three winding units 12a to 12c are fed out at the same speed, and the object-to-be-conveyed suspension device 9 descends while maintaining a horizontal posture.
When the drum 11 rotates in the belt hoisting direction, the three suspending belts 13a, 13b, and 15 are wound up at the same speed, and the conveyed object suspending device 9 rises while maintaining the horizontal posture. . The lifting and lowering of the conveyed object suspending device 9 allows the conveyed object supported by the hangers 10a and 10b to be transferred to a ground loading platform or the like, or conversely, to be lifted from a ground loading platform or the like. Can be.

As described above, the conveyed object hanging device 9 can be driven up and down, but the conveyed object hanging device 9 that is lowered by the extension of the hanging belts 13a, 13b, and 15 is placed above the equipment on the ground side. When the device 9 cannot be lowered due to climbing or catching on the suspension belts 13a, 13b,
15 will loosen. Among them, the transported object suspension device 9
Suspension belt covering approximately half of the total load, including the weight of
Since the slack of 15 is detected by the limit switch 24, the drive of the belt winding drum 11 can be automatically stopped by the detection signal of the limit switch 24.

It is preferable that the belt winding drum 11 be of a type having a built-in motor and a speed reducer. However, in some cases, the motor and the speed reducer may be provided outside the drum 11, and both may be linked to each other by an appropriate transmission means. . Further, the belts 13a, 13
Transferred object hanging device 9 suspended via b, 15
For example, when a motor for opening and closing the hangers 10a and 10b is mounted, a power supply line and a control line to the motor are
It can be incorporated in at least one of the belts 13a, 13b, and 15. In other words, the suspension belts 13a, 13b, 15
It is desirable to use one in which a plurality of reinforcing wires that can be diverted to a power supply line or the like are built in along the length direction.

(Operation and Effect of the Invention) According to the transporting vehicle with the transported object suspending device of the present invention which can be implemented as described above, the transported object suspending device is suspended by the three suspension belts so as to be able to move up and down. Therefore, the load can be reliably applied to all three belts, and there is no danger that one belt will loosen freely as in the case of four-point suspension. The lifting and lowering drive can always be performed stably, and the three suspension belts are arranged horizontally horizontally on the left and right sides at one of the front and rear sides of the upper end of the lifting and lowering path of the apparatus for suspending the transported object.
It is possible to control the winding and unwinding with one belt winding drum, and it is possible to reduce the size and weight of the transport vehicle including the belt winding drum as compared with the case where a plurality of belt winding drums must be used. However, according to the configuration of the present invention, the following special effects can be expected. (A) In comparison with the case in which the two outer hanging belts 13a and 13b hang the left and right two portions of the end of the transported object hanging device 9 where the belt winding drum 11 is located, the hanging belt The entire required length can be shortened, and at the same time, a single central suspension belt 15 having an extra path portion that straddles the upper end of the lifting / lowering path of the conveyed object suspension device 9 in the front-rear direction. Since approximately half of the total load including the weight of the transporting object suspending device 9 acts, it is always in a tensioned state.
Since the slack of the central belt 15 is detected by the belt slack detecting means (limit switch 24), one belt slack detecting means (limit switch 24) is provided.
, It is possible to always perform reliable abnormality detection without malfunction.

(B) Belt slack detection means (limit switch 24)
Since the center single hanging belt 15 is disposed adjacent to the extra path portion of the suspended belt 15 having an extra path section that straddles the upper end of the lifting path of the transported object suspending device 9 in the front-rear direction. As compared with the case where the belt slack detecting means is arranged adjacent to another belt which must be turned downward by the belt guide immediately after coming out of the winding drum 11,
Belt winding drum 11 and belt guide (pulley 14a,
14b, 16a, 16b), etc., as close as possible to the upper end of the lifting / lowering path of the conveyed object suspending device 9, and the slack is detected by the belt slack detecting means (limit switch 24) while the entire transport carriage is compact. A sufficient space can be ensured around the belt portion to allow the belt slack detecting means (limit switch 24) to be easily attached, and the belt slack can be reliably detected.

[Brief description of the drawings]

1 is an overall side view, FIG. 2 is a front view of the same, FIG. 3 is an enlarged vertical sectional side view of a main part, and FIG. 4 is a cutaway plan view of the same part. DESCRIPTION OF SYMBOLS 1 ... Carrying trolley, 2 ... Driving trolley, 3 ... Follower trolley, 4 ... Guide rail, 7 ... Power supply rail, 8 ... Current collecting unit, 9 ... Suspended device for transferred object, 11 ... Belt Winding drum, 12a to 12c ... winding unit, 13a, 13b,
15 ... hanging belt, 14a, 14b, 16a, 16b ... belt guide pulley, 24 ... limit switch for detecting belt slack (belt slack detecting means).

Claims (1)

(57) [Claims] 1. A transport trolley equipped with a transporting object suspending device, wherein the transporting device suspending device is suspended by three suspending belts so as to be able to move up and down, and belt slack detecting means is provided. The hanging belt of the book is arranged side by side in the front-rear direction at the upper end of the lifting / lowering path of the conveyed object hanging device, and is arranged side by side in the left-right and horizontal direction. The two hanging belts extending from each of the three winding units and extending from the winding units at both ends are turned downward by a belt guide and the hanging belt of the conveyed object hanging device is turned off. Left and right 2 of the end on the side where the belt winding drum is located, of the front and rear ends
A single suspension belt extending from the center take-up part is suspended downward by turning over the upper end of the lifting path of the transported object suspension device via the belt guide in the front-rear direction. After that, the center of the other end of the conveyed object hanging device is hung at one point, and the belt slack detecting means detects slack of one hanging belt extending from the center winding portion. A transport carriage with a transported object suspending device disposed adjacent to a belt portion straddling the upper end of the lifting path of the transported object suspending device in the front-rear direction.