JPH074487U - Belt type hoist belt feeding and winding control device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a device capable of reliably controlling the feeding and winding of a belt of a belt type hoist without using a complicated means. [Structure] The belt type hoist raises and lowers an elevating body by feeding and winding the belts 15, 15. In the longitudinal direction of the one belt 15, coloring portions 30, 31, 32 colored with a color different from the color of the belt 15 are provided.
A color identification sensor 33 is provided at a location facing the colored portions 30, 31, 32. Sending out the belt 15,
As the belt is wound up, the colored portions 30, 31, 32 of the belt 15
Passes in front of the color identification sensor 33. The color identification sensor 33 detects the colors of the colored portions 30, 31, 32, and when the colored portions change, outputs a signal to change or stop the feeding or winding speed of the belt 15.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for controlling the feeding and winding of a belt of a belt type hoist.

[0002]

[Prior art]

 Conventionally, there is a chain type hoist (not shown) that raises and lowers an elevating body by feeding and hoisting a chain. Transported items can be hung on the elevator. Stopping of the lifting / lowering body at the lowering limit or the upper limit is performed by counting the pulse from the pulse encoder connected to the motor or the rotating body (for example, sprocket) of the hoist with the pulse counter, or the motor or the rotating body. The striker attached to the body is rotated to activate the photoelectric switch, and the pulse generated by this is counted by the pulse counter.

[0003]

[Problems to be solved by the device]

 However, such a mechanism for stopping the lifting body using the pulse counter has the following problems. (1) A pulse encoder or photoelectric switch and a pulse counter are required, and the number of parts is large. (2) If the hoist stops while the power is turned off while the pulse counter is counting, the number of counts will be erased and the lift position of the lift will be unknown.

[0004]

[Means for Solving the Problems]

 The present invention relates to a belt type hoist which elevates and lowers an elevating body by feeding and winding a belt, and a coloring portion colored in a color different from the color of the belt in the longitudinal direction of the belt, and a color for detecting the color of the coloring portion. The above problem is solved by a device having an identification sensor.

[0005]

[Action]

 As the belt is fed and rolled up, the belt passes in front of the color identification sensor. The color identification sensor continues to detect the color of the colored portion or the color of the belt, emits a signal when the color changes, and stops the feeding or winding of the belt. As a result, the lifting / lowering body is stopped from moving up and down.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. The belt type hoist 10 is provided on a self-propelled carrier 11. The self-propelled carrier 11 travels on a rail R laid in a high place by a driving roller 12 and a driven roller 13. The drive roller 12 (see FIG. 2) is rotated by the drive motor 14.

The belt type hoist 10 has four belts 15, 15, 16, and 16 and a lifting motor 17. One ends of the four belts 15 and 16 are wound around the hoisting drums 18 and 19, and a hanger (elevating body) 20 for suspending a conveyed product is suspended at the other ends. Intermediate portions of the belts 15 and 16 are supported by the idle rollers 21 and 22. The winding drums 18 and 19 are connected to the lifting motor 17 by a chain 23.

In the longitudinal direction of one of the four belts 15, 15, 16, 16 as shown in FIG. 4, as shown in FIG. ) 30, a low speed colored area (colored portion) 31, and a high speed colored area (colored portion) 32. The colored regions 30, 31, 32 are provided on the surface on the side that contacts the winding drum 18 and the idle rollers 21, 22. A color identification sensor 33 is provided on the side where the colored regions 30, 31, 32 are provided. The colored areas 30, 31, 32 and the color identification sensor 33 may be provided on the opposite side.

Next, the operation will be described. First, the belts 15 and 16 are wound up by the winding drums 18 and 19, and the hanger 20 is in a raised state. Further, it is assumed that the stop coloring area 30 faces the color identification sensor 33 (see FIG. 5). Originally, the color identification sensor 33 stops the lift motor 17 when the color of the stop coloring area 30 is detected, but is in a non-operating state at the time of starting. Therefore, even if the stop coloring area 30 faces the color identification sensor 33, the ascending / descending motor 17 is started and the feeding of the belts 15 and 16 is started.

As the belts 15 and 16 are fed, the low speed colored area 31 faces the color identification sensor 33. The color identification sensor 33 detects the color of the low speed colored area 31 and rotates the lifting motor 17 at a low speed. The hanger 20 descends slowly.

The belts 15 and 16 are subsequently sent out, and the high speed colored area 32 faces the color identification sensor 33. The color identification sensor 33 detects the color of the high-speed colored area 32 and rotates the lifting motor 17 at high speed. The hanger 20 descends quickly and approaches the end of the descent.

When the hanger 20 descends close to the lower limit, the low speed colored area 31 faces the color identification sensor 33. The color identification sensor 33 detects the color of the low speed colored area 31 and rotates the lifting motor 17 at a low speed. The descent speed of the hanger 20 is reduced.

Finally, the stop coloring area 30 faces the color identification sensor 33 (see FIG. 4). The color identification sensor 33 detects the color of the stop coloring area 30 and stops the lift motor 17. The hanger 20 stops at the desired height.

When the hanger 20 is raised, the same operation is performed. However, the lifting motor 17 rotates in the direction in which the belts 15 and 16 are wound up. A series of these operations is performed by a control circuit (not shown).

The color of the belt itself may be used for the stop coloring area 30. Alternatively, only one colored area may be provided, and the control operation may be an operation of simply stopping the belts 15 and 16. Further, as shown in FIG. 6, the colored areas 30, 31, 32, 30, 31, 32 may be provided on different belts 115, 115. In this case, it goes without saying that the sensor is provided so as to face each belt.

[0016]

[Effect of device]

 The belt feeding / winding control device of the present invention detects the color of the belt and controls the feeding / winding of the belt. (1) Since the pulse encoder or photoelectric switch and the pulse counter, which have been conventionally required, are unnecessary, the structure can be simplified. (2) Even if the power is turned off during the operation of the hoist and the feeding and winding of the belt is interrupted, the feeding and winding of the belt can be performed again as it is.

[Brief description of drawings]

FIG. 1 is a front view of a self-propelled transport vehicle in which a belt feeding and winding control device of a belt type hoist of the present invention is incorporated.

FIG. 2 is a left side view of FIG.

FIG. 3 is a plan view of a belt type hoist.

FIG. 4 is a schematic perspective view of a belt feeding / winding control device.

5 is a schematic perspective view of a state in which the belt is wound up from the state of FIG.

FIG. 6 is a schematic perspective view of another belt feeding and winding control device.

[Explanation of symbols]

 10 Belt Hoist 15, 16, 115 Belt 20 Hanger (elevator) 30 Coloring Area for Stopping (Coloring Section) 31 Coloring Area for Low Speed (Coloring Section) 32 Coloring Area for High Speed (Coloring Section) 33 Color Identification Sensor

Claims (1)

[Scope of utility model registration request] 1. A belt type hoist for raising and lowering an elevating body by feeding and winding up a belt, and a coloring portion colored in a color different from the color of the belt in a longitudinal direction of the belt, and a color for detecting a color of the coloring portion. A belt-type hoist belt feeding / winding control device having an identification sensor.