JPS6326328Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a movable member position detection device for a garbage truck, and in particular, the movement of a deflector swinging inside the tailgate is guided to the outside to determine the operating limit position of the deflector. The present invention relates to a movable member position detection device for a garbage truck that allows indirect detection.

(Prior Art) Generally, a garbage collection vehicle has a garbage storage box opened at the rear mounted on the vehicle body, and a tailgate with a built-in loading device is attached to the rear opening of the garbage storage box. Although various types of loading devices are used, the loading device to be solved by the present invention is a loading device called a centerless type. A scraping panel is pivotally supported on the lower end of a slider panel that moves up and down along the guide groove of a swingable deflector. It is designed to move along a locus of motion that achieves this goal. and,
The change in each of the above steps is detected by a limit switch and a linkage, thereby causing the scraping panel to perform a movement corresponding to each step.

To this end, conventionally, various limit switches have been placed near the hydraulic cylinder device or link in the tailgate to stop and start the movement of the link member at its limit position.

(Problem that the invention aims to solve) However, since the inside of the tailgate is constantly exposed to dust and sewage, failures such as faulty limit switch contacts are likely to occur, and malfunctions may occur, reducing reliability. I had a problem with it missing. Furthermore, when a limit switch is provided in a narrow space inside a tailgate where various panels and link members intersect, as in the past, there is a problem in that maintenance and inspection are difficult.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a movable member position detection device for a garbage truck that can guide the swinging motion of a deflector to the outside of the tailgate in a centerless type garbage loading device.

(Means for Solving the Problems) Therefore, the present invention which achieves the above object incorporates a slider panel that is vertically slidable in a deflector that can swing around a pivot, and a slider panel that can be slid in the vertical direction is attached to the lower end of the deflector. In a garbage truck in which the garbage is loaded into the storage chamber by holding the deflector and moving the scraping panel along a predetermined movement trajectory inside the tailgate, one end of the signal transmission link is attached to the back surface near the side edge of the deflector. The other end of this signal transmission link is connected to the free end of the crank arm, and a signal take-out shaft is fixed to the base end of this crank arm, and this signal take-out shaft is passed through the side plate of the tailgate to the outside. A cam is fixed to the outer end of the signal output shaft, and a plurality of limit switches are arranged outside the cam.

(Function) According to the present invention, when the deflector swings back and forth, the signal transmission link follows the movement of the deflector to swing the crank arm, and the signal take-out shaft rotates by a certain angle. Accordingly, the cam swings within a certain angle range, and the switch cam switches the limit switch to detect the operating limit position of the deflector.

(Embodiment) An embodiment of the movable member position detection device for a garbage truck according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 indicates a garbage storage box of a garbage collection vehicle.The rear end of this garbage storage box 1 is open, and a gate-shaped rear frame 2 is attached to the open end. A tailgate 5 that can be opened and closed via a bracket 3 and a pivot 4 is provided on the upper part of the vehicle. This tailgate 5 has a pair of side plates 6, 6 facing each other on both sides, and a sump 7 for temporarily storing garbage is provided below these side plates 6, 6.
is installed.

As is clear from FIGS. 1 and 2, the tailgate 5 is driven by the dump cylinder device 8, and the tailgate 5 is driven by the dump cylinder device 8.
a is pivotally connected to the bracket 3 by a pivot pin 9, and the tip of the piston rod 8b is connected to the beam 1.
It is pivotally connected to a bracket 11 on the 0 by a pivot pin 12.

The upper ends of the deflector 14 on both sides are pivotally attached to the pivot shaft 4 . This deflector 1
Reference numeral 4 is for pushing the garbage inside the garbage storage box 1 and preventing the garbage from falling down, and as is well known, it is used to push the garbage inside the garbage storage box 1 and to prevent the garbage from falling down. It is a substantially rectangular panel that extends all the way. This deflector 14 has ear plates 14a, 14a (one not shown) extending rearward so as to be perpendicular to the panel surface. is considered to be in a free state.

A guide groove 15 is formed inside the ear plate 14a, and a slider panel 17 that can be slid in the vertical direction is incorporated inside the guide groove 15. At the lower edge of the slider panel 17, A scraping panel 19 is hinged via a pivot 18 .

The slider panel 17 is suspended by a slider vertical movement cylinder device 20 and is driven in the vertical direction. The cylinder 20a of this cylinder device 20 is pivotally connected to a bracket 22 via a pivot 21, while the piston rod 20b is connected to the pivot 18.
It is pivotally attached to the side end of.

Further, a mounting lug 23 is fixed to the upper rear surface of the slider panel 17, and a cylinder 25a of a scraping panel drive cylinder device 25 is pivotally supported on this mounting lug 23 via a pivot 24, while a piston rod 25b is , the pivot 27 is connected to the mounting ear piece 26 fixed to the back side of the pull-in panel 19.
They are connected by pins.

Furthermore, a pushing cylinder device 28 for pushing the scraping panel 19 forward is incorporated between the beam 10 and the pivot shaft 18, and in the illustrated embodiment, the cylinder 28a is pivotally attached to the beam 10 side, and the piston rod 28b is connected to the shaft end of the pivot 18.

The above-described cylinder devices 8, 20, and 28 are provided on each side of the tailgate side plate, and the scraping cylinder device 25 is provided at the center of the width of the slider panel 17.

According to the present invention, the deflector 1
A mounting lug piece 30 is provided on the back side of the ear plate 14a of No. 4, and a signal transmission link 3 is provided on this mounting lug piece 30.
One end of the signal transmission link 31 is pivotally connected by a pin 32, and the other end of the signal transmission link 31 is connected to a crank arm 34 fixed to a signal take-out shaft 33 by a pin 35. Note that the length of the crank arm 34 can be set arbitrarily. Above signal extraction shaft 3
3 passes through the bearing portion 36 of the side plate 6 and is led out to the outside, and a switch cam 37 is fixed to the shaft end thereof, as is clear from FIG. Limit switches 38 and 39 are arranged outside the switch cam 37. These limit switches 38 and 39 are for detecting the swing limit position of the deflector 14, and
The switch is adjusted in advance so that it is turned on or off at the swing limit position of the deflector 14.

Since the present invention is configured as described above, when the deflector 14 swings back and forth, the signal transmission link 31 swings the crank arm 34 following the movement of the deflector 14, and the signal extraction shaft 33 Rotates by a certain angle. Then, the switch cam 37 swings within a certain angle range, and this switch cam 37 moves the limit switch 3.
8 or 39, the operating limit position of the deflector 14 can be detected.

(Effects of the invention) As described above, according to the invention, the movement of the deflector inside the tailgate is transmitted to the signal output shaft via the signal transmission link and the crank arm, and the switch cam on this shaft is rotated. Since the limit switch is switched by , the amount of change in the signal can be amplified by changing the length of the crank arm, and the rocking limit position of the deflector can be accurately detected. Moreover, since the limit switch is placed in a fixed position on the outside of the side panel of the tailgate, the electrical wiring leading to the limit switch can be held in a fixed state, preventing contact failure due to dust and sewage, and furthermore, inspection and maintenance are extremely easy. It becomes easier.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the operating position detection device for a garbage truck according to the present invention, Fig. 2 is a side sectional view of the interior of the tailgate of the garbage truck, and Fig. 3 shows the signal output shaft and switch cam. The side view shown in FIG. 4 is a front view showing the arrangement of the switch cam and the limit switch. 5... Tail gate, 6... Side plate, 14... Deflector, 17... Slider panel, 19... Scraping panel, 31... Signal transmission link, 33...
...Signal extraction shaft, 34...Crank arm, 37...
...Switch Cam, 38, 39...Limit Switch.

Claims (1)

[Scope of utility model registration request] A slider panel that can swing vertically is built into a deflector that can swing around a pivot.
In a garbage truck that holds a scraping panel at its lower end and loads garbage into the storage chamber by moving the scraping panel along a predetermined trajectory inside the tailgate; a signal is placed on the back near the side end of the deflector. One end of the transmission link is pivotally connected, the other end of this signal transmission link is connected to the free end of the crank arm, and a signal output shaft is fixed to the base end of this crank arm, and this signal output shaft is connected to the side plate of the tailgate. A movable member position detecting device for a garbage truck, characterized in that a switch cam is fixed to the outer end of the signal take-out shaft through which the signal is taken out and a plurality of limit switches are arranged outside the switch cam.