JPS60246412A - Carrying device - Google Patents

Abstract

PURPOSE:To secure the safety of carrying by detecting a weight of an object to be carried, and adjusting a carrying speed of the object to be carried in accordance with this detected weight. CONSTITUTION:When a pressure of a spring 72 of a relief valve 7 is increased gradually from zero in a state that an object to be carried is held by a hydraulic cylinder 5, the held object to be carried starts to be lifted at a part of some pressure. A hydraulic pressure of the spring 72 in this case is detected by a transducer 8, and converted to a weight of the object to be carried, by another transducer 9. Subsequently, this weight signal 91 is applied to a speed pattern signal generator 10, and its output 101 becomes such a speed control signal pattern as the larger the weight is, the lower the speed becomes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a transport device that transports an object at a speed corresponding to the weight of the object.

[Prior Art] Conventional conveyance devices of this type usually target and transport a specific object to a destination at a constant speed.

Therefore, even if the weight of the object to be transported changes, the speed pattern remains constant, so it will be transported at the same speed.When transporting a heavy object, the kinetic energy increases and it takes time to stop suddenly. It was dangerous.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones, and it detects the weight of the object to be transported and adjusts the speed to transport the object at a speed corresponding to the weight. To provide a transport device that can safely transport objects of arbitrary weight to a destination.

[Example of practical application of the invention]

An embodiment of the present invention will be described below with reference to FIGS. That is, in Figures 1 to 8, (1) is an oil tank, (2) is driven by a motor (3), and the oil in the oil tank (1) is hydraulically pumped in the direction of the arrow through a check valve (4). This is an oil pump that sends oil to the cylinder (5). Here, the hydraulic cylinder (5) is configured to drive an object gripping mechanism such as an arm to grip and lift the object. (
6) is a valve, (7) is a valve body (C), four springs that press this valve body), and a DC motor (C) that adjusts the pressing force of this spring). The relief valve adjusts the oil pressure by returning oil in the direction of the arrow when opened, (8) is a converter that converts the oil field into electricity, and (9) is the oil pressure signal from the voice transformer (8). The conversion i,on that derives the weight signal 0υ corresponding to the weight of the object is a speed pattern generator that derives the transport speed pattern (101) according to the weight signal all).

With this configuration, when the pressing force of the spring (2) of the relief valve (7) is gradually increased from O while the object to be transported is gripped by the hydraulic cylinder (5), a certain pressing force is reached. The object being carried starts to be picked up. At this time, the pressing force of the spring (2), that is, the oil pressure, is detected by the converter (8) as the oil pressure signal elυ.

These six hydraulic signals are converted into a weight signal 01J corresponding to the weight of the transported object by a converter (9), and this weight signal a
The speed pattern signal (101) corresponding to speed pattern No. 4 (101) is used to control the travel of a transport device (not shown) to transport the object to the destination.

Here, as shown in FIG. 4, the transport speed of the transported object is configured such that as the weight of the transported object increases, the speed decreases from pattern song a to b.

In this way, it is possible to safely transport not only a specific object but also various objects of arbitrary weight to the destination at a speed commensurate with the weight.Furthermore, hydraulic pressure also depends on the weight of the object. Since it can be adjusted accordingly, the load on the motor is reduced and it also contributes to energy saving.

〔Effect of the invention〕

As described above, the conveying device according to the present invention is configured to convey the object at fC speed according to the weight of the object, and can always carry out safe and reliable transportation regardless of the weight of the object.

[Brief explanation of drawings]

1 to 4 each show an embodiment of the present invention, in which FIG. 1 is a schematic diagram of the overall configuration, FIG. 2 is an enlarged configuration diagram of the main parts, and FIG. 8 is a block diagram of the main parts. FIG. 4 is a characteristic diagram. In the figure, (1) is the oil tank, (2) is the oil pump, (3) is the motor, (4) is the check valve, (5) is the hydraulic cylinder, and (6) is the oil tank.
) is a valve, (7) is a relief valve, (8) and (9) are converters, and C1ot is a speed no-turn generator. In addition, the same symbols in the figures indicate the same parts.

Claims (3)

[Claims] (1) A device for detecting the weight of an object to be transported, and a device for generating a speed signal according to the detected weight of the device, and configured to transport the object at a speed corresponding to the weight of the device. A transportation device. (2) The transport device according to claim 1, wherein the object to be transported is lifted by a lifting device having a hydraulic mechanism. (3) The conveyance device according to claim 2, wherein the overlay detection device is configured to respond to the hydraulic pressure of the hydraulic mechanism.