JPS5935447Y2 - Control device for garbage loading device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a control device for a garbage loading device attached to a hopper of a garbage collection vehicle or the like.

The switch pushbuttons that control such garbage loading devices tend to be larger and require less force to operate from an ergonomic point of view, but the garbage loading device itself must have an instant activation function. There have been many cases in which the dust loading device has been activated simply by touching the push button with a part of the worker's body, resulting in serious personal injury. In the control relay circuit, the loading control relay C
A delay relay TDK is connected in parallel with R, and the normally open contact TDR-1 of the delay relay is connected in the self-holding circuit of the loading control relay.
A simple electrical circuit in which a normally closed switch LS-1, which opens at the end of the loading operation, is inserted in series allows the garbage loading device to be instantaneously activated by a push button switch. The garbage loading device is designed to hardly start moving even if a part of the body touches it.

In the figure, 1 is a dust collection container mounted on the rear body of a garbage collection vehicle (automobile), and 2 is a gate-shaped hopper that is pivoted to a reinforcing member 1a at the rear end opening of the dust collection body so that it can be opened and closed. A centerless garbage loading device is disposed inside the hopper 2.

The garbage loading device includes a telescoping partition board 6 whose upper end is pivotally mounted on a reinforcing member 1a by a shaft 4 and telescoped by a hydraulic cylinder 5, and a shaft 7 at the lower end of an inner slide board 6a of the telescoping partition board. a loading panel 8 which is pivotally mounted by the hopper and cooperates with the hopper bottom concave surface 2C, and a hydraulic cylinder 9 mounted between the upper end of the inner slide plate 6a and the loading panel 8 so as to be able to swing the loading panel. and the rear reinforcement 2 of the hopper 3.
It includes a hydraulic cylinder 10 mounted between a and a shaft 7 so as to be able to swing the telescoping partition panel 6.

In FIG. 4, PBS' is a normally closed pushbutton switch for emergency stop of the garbage loading device, CR-1 is a self-holding contact of the loading control relay CR, and CR-2 is a loading control that controls the loading control circuit 11. This shows the contact point of relay CR, and the loading control circuit 11 controls the contraction of the hydraulic cylinder 9 to reverse the loading panel 8 from the non-operating state shown by the solid line in FIG. 1 or 2 to the position A shown by the chain line about the shaft 7. the contraction operation of the hydraulic cylinder 10 to retreat the loading panel 8 to the position B indicated by the chain line around the shaft 4, and the hydraulic pressure that pushes the loading panel 8 to the position C indicated by the chain line guided by the contracted hydraulic cylinder 10. cylinder 5
The extension action of the hydraulic cylinder 9 moves the loading panel 8 from the C position or the position shown by the solid line in FIG. Loading panel 8 guided by hydraulic cylinder 10
The contraction operation of the hydraulic cylinder 5 that pulls up to the position E shown by the chain line, and the extension operation of the hydraulic cylinder 10 that pushes the loading panel 8 together with the telescoping partition panel to the position F shown the chain line about the shaft 4 are sequentially performed. , has a configuration in which the control valves of the medium hydraulic cylinders are sequentially switched, and when the loading panel 8 returns to the position F shown by the chain line in Figure 3 or the position shown by the solid line in Figure 2, the normally closed switch (limit switch) LS-1 opens. .

The limit switch LS-1 is installed on the outer surface of the hopper 2, facing a cam attached to the outer end of the shaft 4 fixedly supported by the telescoping partition panel 6, so as to detect the end of the garbage loading operation. The delay relay TDR shall be attached to the hopper at a set time (the delay time shall be approximately 1.5 to 2 seconds).

According to the above configuration, in order to start loading the garbage input into the hopper 2 from the input port 2b, when the switch PBS is closed and the relays CR and TDR are made conductive, the contacts CR-1 and C
When R-2 closes, the loading panel 8 immediately begins to reverse to the above-mentioned A height position, but the delay relay contact TDK-1 is delayed in closing by a preset time, and the switch LS-1 is closed by the loading panel 8. The telescoping partition panel 6 is mechanically opened until it starts to retreat after the reversal of the partition panel 6 is completed.

Therefore, if the switch PBS pushbutton is kept pressed until the contact TDR-1 and switch LS-1 are closed, the self-holding circuit of the relay CR becomes conductive, so even if the pushbutton is released, the loading device continues the loading operation described above, but
If the push button operation of the switch PBS is stopped before this self-holding circuit becomes conductive, the loading device will immediately stop.

Therefore, even if the operator accidentally touches the button, there is no risk of personal injury because the loading device only operates for a moment when the operator touches the button.

The reason why contact TDR-1 and switch LS-1 are inserted in series in the self-holding circuit of relay CR is that this switch detects the end of one cycle of loading operation and stops the operation of the loading device and delay relay TDK. In addition, even when restarting the loading device after opening the switch PBS' and stopping the loading device during the loading operation, the loading operation will not be performed unless the push button is held down for a certain period of time. This is to prevent them from gaining.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view of the garbage loading device, FIGS. 2 and 3 are longitudinal side views showing the progress of the loading operation, and FIG. 4 is an electric circuit diagram. PBS... Normally open push button switch, CR...
...Loading control relay, CR-1, CR-2...
・Normally open contact, TDR...Delay relay, TDR-
1... Normally open contact, LS-1... Normally open switch, 1... Dust collection body, 2... Hopper 6... Telescoping partition panel, 8...Loading panel, 5, 9.10...Hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] A delay relay is connected in parallel with the loading control relay in a loading control relay circuit that is turned on and off by a normally open pushbutton switch, and a normally open contact of the delay relay is connected in the self-holding circuit of the loading control relay. A control device for a garbage loading device, characterized in that a normally closed switch that opens at the end of loading operation is inserted in series with a normally closed switch.