JPH0712322Y2 - Control device for garbage truck - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a control device for a refuse collecting vehicle, in which a tailgate having a refuse loading device including a rotating plate and a pushing plate is connected to a rear portion of a dust storage box. .

[Prior Art] Generally, in a garbage truck, as shown in FIG.
It is known that a tailgate 2 is connected to a rear portion of the dust container 1 and a dust loading device 5 including a rotating plate 3 and a pushing plate 4 is built in the tailgate 2. In this type of dust collecting vehicle, when loading dust, the dust thrown into the tailgate 2 is scooped by the rotating plate 3 and the scooped dust is pushed into the dust storage box 1 by the pushing plate 4. ing.

This dust loading operation is generally performed according to a sequence circuit, and the operation timings of the rotating plate 3 and the pushing plate 4 are
For example, it is controlled by a position detector including a cam mechanism (not shown) fixed to the rotary shaft 3a of the rotary plate 3 and a switch (not shown) whose contacts are appropriately opened and closed by the rotation of the cam mechanism. It was like that.

By the way, in the case where the cam mechanism is fixed to the rotary shaft 3a, when the rotary shaft 3a is worn, a rotational runout occurs in the rotary shaft 3a, and a change occurs in the rotation locus of the cam mechanism. There is a problem in that there is a delay in opening and closing the contacts, and this delay causes a deviation in the operation timing between the rotary plate 3 and the push-in plate 4, making it impossible to maintain a smooth loading operation. was there.

Therefore, conventionally, provided with a switch bracket that cannot move in the rotation direction and the axial direction of the rotary shaft, but can move in the vertical and horizontal directions with respect to the center line of the rotary shaft,
It has been proposed that a switch be attached to the switch bracket so that the switch bracket can be moved and finely adjusted when the rotational trajectory of the cam mechanism is displaced (see Japanese Utility Model Publication No. 52-35606). .

[Problems to be solved by the device]

However, the one described in Japanese Utility Model Publication No. 52-35606 is not only required to be assembled with high accuracy due to the structure of the switch block and the mounting position of the switch, but also around the switch bracket. Since it is necessary to install the parts of the above, there is a problem that it takes a considerable time to machine the parts.

In order to solve such a problem and to simplify the structure and improve the detection position accuracy, the applicant has previously filed Japanese Patent Application No. 63-120936.
However, in addition to the above, it is an object of the present invention to provide a product that is further simplified in manufacturing.

[Means for Solving the Problems]

In order to achieve the above object, the control device for a refuse collecting vehicle according to the present invention has a tailgate connected to a rear portion of a refuse storage box with a built-in dust loading device including a rotating plate and a pushing plate. In a control device for a refuse collection vehicle in which a plate and a pushing plate are cooperated to load the dust into the dust storage box, a disc-shaped cam plate fixed to an end of a rotary shaft of the rotating plate. An arm whose one end is connected to the fixed portion of the tailgate through a ball joint, an urging means for urging this arm in the direction of the rotation axis and the direction of the cam plate, and the other end of the arm. A fixed side surface, a sliding side surface that abuts on the side surface of the cam plate by an urging means and slides on the side surface of the cam plate, and an abutting surface on the outer peripheral surface of the rotary shaft by an urging means. Sliding having a sliding lower surface that slides on the outer peripheral surface of the rotating shaft A piece, a detection switch attached to the sliding piece attachment side of the arm, and a detected portion attached to the cam plate to indicate the rotation angle of the rotary plate and detected by the detection switch. The timing of the operation of the rotary plate and the pressing plate is controlled by the output from the detection switch.

[Action]

According to the present invention configured as described above, when the rotation center of the rotating plate is displaced due to wear, one end of the arm is supported through the ball joint and the sliding piece is
A fixed side surface fixed to the other end of the arm, a sliding side surface abutting the side surface of the cam plate by an urging means to slide on the side surface of the cam plate, and an outer circumference of the rotary shaft by the urging means. It has a sliding lower surface that is brought into contact with the surface and slides on the outer peripheral surface of the rotating shaft. Therefore, the arm follows the movement of the sliding piece that comes into contact with the side surface of the cam plate and the outer peripheral surface of the rotating shaft,
The cam plate freely swings in the left and right and up and down directions, and the relative positional relationship between the cam plate and the detected portion provided on the cam plate and the detection switch via the rotary shaft and the sliding piece is always constant. Therefore, even if the center of rotation of the rotary plate is displaced due to wear, the arm is also displaced in accordance with the displacement, and the relative position between the detection switch attached to this and the detected portion of the cam plate fixed to the rotary shaft. The positional relationship does not change, and the position can be detected with high accuracy.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 6, a tailgate 2 is connected to the rear of the dust container 1 and a dust loading device 5 including a rotating plate 3 and a pushing plate 4 is built in the tailgate 2. When loading dust, the dust thrown into the tailgate 2 is first scooped up by the rotating plate 3, and the scooped dust is pushed into the dust storage box 1 by the pushing plate 4. There is.

1 to 4 show a first embodiment of the present invention, in which the rotary shaft 3a of the rotary plate 3 is supported via a bearing 6a and a thrust bearing 6b, and the side plate 2a of the tailgate 2 is mounted on the rotary shaft 3a. A disk-shaped cam plate 8 is fixed to the end of the rotary shaft 3a through three bolts 7 so as to penetrate therethrough and project to the outside. A slit 9 is provided inside the cam plate 8 as a detected portion extending in the circumferential direction with a constant radius.

Further, the base end of a rotatable ball joint 10 is fixed to the side plate of the tailgate 2.
One end of an arm 11 extending substantially in parallel is connected to the rotating part, so that the arm 11 can swing up and down (Y direction in FIG. 3) and left and right (also X direction).

On the other end (free end) side of the arm 11, a fixed side surface of a sliding piece 12 is fixed to face the side surface of the cam plate 8, and the arm 11 and the side plate 2a of the tailgate 2 are connected. A tension spring 14 is stretched between them, and the elastic force of the tension spring 14 causes the sliding side surface of the sliding piece 12 to move to the side surface of the cam plate 8 and the sliding lower surface of the sliding piece 12 to move to the rotary shaft 3a. It is configured to be pressed against the outer peripheral surface with an appropriate force and slide on these surfaces.

As a result, when the center of rotation of the rotary plate 3 is displaced due to wear, the sliding piece 12 follows this displacement, and the arm 11 is integrated with this sliding piece 12 and moves up and down following this displacement. And is configured to swing to the left and right.

It is preferable that the sliding piece 12 is made of a soft material such as industrial nylon or tetron in order to eliminate the need for lubricating oil to be supplied to the abutting portion and to facilitate maintenance.

Further, at a position corresponding to the slit 9 of the cam plate 8 of the arm 11, a detection switch formed of a proximity switch is provided.
15 is fixed, and the position of the rotary plate 3 when the detecting portion of the detecting switch 15 is positioned in the slit 9 can be detected.

In this way, by fixing the detection switch 15 to the arm 11, the cam plate 8 and the slit (detected portion) 9 provided on the cam plate 8 and the detection switch 16 are relatively arranged via the rotary shaft 3a and the sliding piece 12. The positional relationship is always constant.

Next, the operation of the above embodiment will be described.

When the rotary shaft 3a of the rotary plate 3 rotates, the cam plate 8 also rotates, and when a suitable rotation angle is reached, the detection switch 15 detects the slit 9 and outputs a signal indicating the rotary angle of the rotary plate 3. To do. When this signal is output, a series of loading operations of the dust loading device 5 are performed according to a sequence circuit (not shown).

By the way, when the rotating shaft 3a or the like is worn and the support portion or the like of the bearing 6a is loosened, the rotation center of the cam plate 8 is displaced and the locus of the slit 9 of the cam plate 8 is changed.

In such a case, the arm 11 via the ball joint 10
One end of the sliding piece 12 is supported on the other end side of the arm 11, and the sliding side surface is on the side surface of the cam plate 8 and the sliding lower surface is on the rotating shaft 3a. Each of them is configured to be pressed against and slide on the outer peripheral surface thereof. Therefore, this sliding piece 12 is displaced according to this displacement, and the arm 11 is also united with this sliding piece 12 and freely swings up and down (Y direction in FIG. 3) and left and right (also X direction).

Moreover, since the detection switch 15 is attached to the arm 11, the distance C between the detection switch 15 and the sliding piece 12 and the distance from the rotation center of the detection switch 15 and the slit 9 are kept constant. The relative positional relationship between the detection switch 15 and the slit 9 does not change.

Therefore, even if the rotation center of the cam plate 8 is displaced, the position of the slit 9 of the cam plate 8 can be reliably detected by the detection switch 15.

FIG. 5 shows the second embodiment. In the case of the above embodiment, a proximity switch is used as the detection switch 15, but in the case of the present embodiment, there is no switch 15 'for detecting a micro switch, Further, as the detected portion 9'of the cam plate 8,
The cam plate 8 is provided with a dock instead of the slit.

[Effect of device]

Since the present invention is configured as described above, even if the center of rotation of the rotary shaft is displaced due to wear or the like, a relative positional change does not occur between the cam plate and the detection switch, and it is always stable. It is possible to perform accurate position detection.

Moreover, not only is the structure relatively simple, but also high processing accuracy is not required for the cam plate and sliding piece, and high mounting positional relationship is not required. There is an effect that you can.

[Brief description of drawings]

FIGS. 1 to 4 show a first embodiment of the present invention.
FIG. 2 is a perspective view showing a main part, FIG. 2 is an exploded perspective view showing an arm and its attachments taken out, and FIG. 3 is an III-I of FIG.
A sectional view taken along line II, FIG. 4 is an enlarged view of a main part of FIG. 3, FIG. 5 is a view corresponding to FIG. 4 showing a second embodiment, and FIG. 6 is a side view of the refuse collection vehicle. 1 ... Dust storage box, 2 ... Tailgate, 3 ... Rotating plate, 3a ...
Rotation axis, 4 ... Pushing plate, 5 ... Dust loading device, 8 ... Cam plate,
9 ... Detected part (slit), 9 '... Detected part (dog), 10 ... Ball joint, 11 ... Arm, 12 ... Sliding piece, 14 ... Energizing means (tensile spring), 15 ... Detection switch (proximity) Switch), 15 '... Detection switch (micro switch).

Claims (1)

[Scope of utility model registration request] 1. A dust container loading device comprising a rotating plate and a pushing plate is built in a tailgate connected to a rear portion of the dust containing box, and the rotating plate and the pushing plate cooperate with each other to collect the dust. In a control device for a dust collection vehicle that is designed to load dust inside, a disc-shaped cam plate fixed to the end of the rotary shaft of the rotary plate and one end to the fixed part of the tailgate via a ball joint. Connected to each other, an urging means for urging the arm in the direction of the rotation axis and the cam plate, a fixed side surface fixed to the other end of the arm, and a side surface of the cam plate by the urging means. Has a sliding side surface which abuts on the side surface of the cam plate and a sliding lower surface which abuts on the outer peripheral surface of the rotary shaft by an urging means and slides on the outer peripheral surface of the rotary shaft. The sliding piece and the detector mounted on the sliding piece mounting side of the above arm. The cam plate includes a switch and a detected portion which is attached to the cam plate to indicate the rotation angle of the rotary plate and is detected by the detection switch. The output from the detection switch causes the rotary plate and the pushing plate to be connected. A control device for a garbage truck, characterized in that the timing of the operation of the vehicle is controlled.