JPH0620732Y2 - 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 including a dust loading device including a rotating plate and a pushing plate.

[Conventional technology]

Generally, as shown in FIG. 7, a tailgate 2 is provided at the rear of the dust container 1 and a dust loading device including a rotating plate 3 and a pushing plate 5 is provided inside the tailgate 2. The garbage truck is known. In this type of conventional garbage truck, 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 5. Has become.

This dust loading operation is performed according to a sequence control circuit, and the operation timing of the rotary plate 3 and the push plate 5 is determined by a cam mechanism (not shown) fixed to the rotary shaft 3a of the rotary body 3.
And a switch (not shown) whose contacts are appropriately opened and closed by the rotation of the cam mechanism.

By the way, in the case where the cam mechanism is fixed to the rotating shaft 3a,
When the shaft 3a rubs, rotational shake of the shaft 3a occurs, displacement of the rotation path of the cam mechanism occurs, and opening and closing of the switch contact is delayed, so that the tongue of operation of the rotating plate 3 and the pressing plate 5 is deviated. However, there is a problem that a smooth loading operation cannot be maintained.

Therefore, conventionally, a switch bracket that cannot move in the rotation direction and the axial direction of the rotating shaft, but can move in the vertical and horizontal directions relative to the center line of the rotating shaft is attached to the switch bracket, and the rotation path of the cam mechanism is changed. It has been proposed that the switch bracket be moved to allow fine adjustment when a displacement occurs in the position (Japanese Utility Model Publication No. 52-35606).

[Problems to be solved by the device]

However, in the above-mentioned Japanese Utility Model Publication No. 52-35606, since a proximity switch or the like is used, there is a problem that assembly accuracy and the like must be finished high. Further, since many parts must be mounted around the rotary shaft or the switch bracket, there is a problem in that machining thereof takes time.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional technique, and to provide a control device for a refuse collecting vehicle, which has a simple structure and has a high detection accuracy of the position of the rotating plate.

[Means for Solving the Problems]

In order to achieve the above object, the present invention comprises a dust loading device including a rotating plate and a pushing plate in a tailgate connected to a rear portion of the dust containing box, and the rotating plate and the pushing plate. In the control device of the refuse collection vehicle, which cooperates to load the refuse into the refuse storage box, a cam plate of a rotatable disc fixed to the end of the rotary shaft of the rotating plate, A bracket having a fitting groove that abuts on the outer peripheral surface of the cam plate and receives the outer peripheral portion of the cam plate, and the bracket is connected to the fixing portion of the tailgate and urged toward the central portion of the cam plate. An output from the detection switch is provided with spring means, a detection switch attached to the bracket, and a detected portion which is attached to the rotary plate to indicate a rotation angle of the rotary plate and is detected by the detection switch. By Another feature of the present invention is that the timing of the operation of the rolling plate and the pushing plate is controlled, and another invention is characterized in that the bracket is formed of a soft resin material. .

[Action]

According to the present invention, the bracket, which is connected to the fixed portion of the tailgate through the spring means and has the detection switch attached thereto, is loosely fitted to the outer peripheral portion of the cam plate and faces the center side of the cam plate. Is pressed. Therefore, when the cam plate rotates, the bracket slides on the outer peripheral portion of the cam plate, and even if the center of rotation of the rotary shaft of the rotary plate is displaced due to friction, the bracket is also displaced following the displacement.
Therefore, the relative positional relationship between the detection switch and the detected portion of the cam plate does not change, and accurate detection can always be performed.

〔Example〕

An embodiment of a control apparatus for a refuse collecting vehicle according to the present invention will be described below with reference to FIGS. 1 to 4 in which the same parts as those in FIG. 7 are designated by the same reference numerals.

As is clear from FIG. 1 and FIG. 2, the rotary shaft 3a of the rotary plate 3 is supported via bearings 6a and thrust bearings 6b, penetrates the side plate 2a of the tailgate 2 and projects to the outside. A disk-shaped cam plate 8 is fixed to the end of the shaft 3a via three bolts 7. Further, the cam plate 8 is formed with an arc-shaped slit 9 having an appropriate length and extending in the circumferential direction. Furthermore, the side plate 2 of the tailgate 2
A ball joint 10 is fixed to a, and an arm 11 is fixed to the ball joint 10 substantially horizontally.

A bracket 12 abutting against the outer peripheral surface of the cam plate 8 is fixed to the free end of the arm 11, and the end surface on the abutting side of the bracket 12 has a cam plate 8 as shown in FIG.
The fitting groove 13 having a groove width w that is slightly larger than the plate thickness t is formed. A tension spring 14 is stretched between the arm 11 and the side plate 2a, and the bracket 12 is pressed against the cam plate 8 with an appropriate force. A detection switch 15 is fixed to the bracket 12, and the detection switch 15 can detect the position of the slit 9 of the cam plate 8 within an appropriate range as shown in FIG. . That is, the slit 9 constitutes a detected portion to be detected by the detection switch 15.

In the illustrated example, the detection switch 15 is a proximity switch, but it may be a micro switch 16 as shown in FIG. In this case, the cam plate 8 is replaced by the dog 1 instead of the slit 9 as the detected portion.
7 is projected. The above-mentioned bracket 12 is preferably molded from a resin-based soft material such as industrial nylon or Teflon. Molding with these eliminates the need for lubricating oil to be supplied to the abutting portion and makes maintenance extremely easy.

Next, the operation of this embodiment will be described.

When the rotary shaft 3a of the rotary plate 3 rotates, the cam plate 8 rotates together, and when the rotation angle reaches an appropriate rotation angle, the detection switch 15 detects the position of the slit 9 and a signal indicating the rotation angle of the rotary plate 3. Is output. When this signal is output, a series of loading operations of the dust loading device is performed according to a sequence control circuit (not shown).

By the way, when the rotating shaft 3a or the like is rubbed and the supporting portion or the like by the bearing 6a is loosened, the rotation center of the cam plate 8 is displaced,
The locus of the slit 9 of the cam plate 8 changes.

In such a case, according to this embodiment, since the arm 11 is supported via the ball joint 10, the arm 11 is freely displaced in the X and Y directions shown in FIG. Moreover, since the bracket 12 is pressed against the cam plate 8 via the spring 14, the bracket 12
Will follow the displacement even if the center of rotation of the cam plate 8 is displaced. Moreover, since the detection switch 15 is attached to the bracket 12 while holding the dimension C, the relative positional relationship between the detection switch 15 and the slit 9 does not change. Therefore, according to this embodiment, even if the center of rotation of the cam plate 8 is displaced, the position of the slit 9 of the cam plate 8 can be reliably detected.

5 and 6 are shown in another embodiment.

The support means of the bracket 12 that engages with the cam plate 8 is different, and other configurations are the same as those described above. The bracket 12 is fixed to a shaft 20, which is attached to a support plate 21 fixed to the tailgate side plate 2a by a spring 22.
It is supported so that it can move up and down. Also in this embodiment, the bracket 12 changes following the displacement of the rotation center of the cam plate 8 as described above, and the slit 9 of the cam plate 8 changes.
The position of can be reliably detected.

[Effect of device]

As is apparent from the above description, according to the present invention, a rotatable disc-shaped cam plate fixed to the end of the rotary shaft of the transfer plate and the cam plate contacting the outer peripheral surface of the cam plate. A bracket having a fitting groove for receiving the outer peripheral end of the bracket, spring means for connecting the bracket to the fixing portion of the tailgate and urging the bracket toward the center of the cam plate, and a detection switch mounted on the bracket. And the detected part to be detected by the detection switch, which is attached to the rotary plate to indicate the rotation angle of the rotary plate, even if displacement occurs at the rotation center of the rotary shaft due to friction or the like. The relative position change does not occur between the cam plate and the detection switch, and accurate detection can always be performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a control device for a refuse collecting vehicle according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a sectional view showing a fitting state of the bracket and the rotary plate, FIG. 4 is a sectional view showing another embodiment, FIG. 5 is a front view showing another embodiment, and FIG. FIG. 5 is a sectional view of the embodiment shown in FIG. 5, and FIG. 7 is a side view showing a conventional garbage truck. 1 ... Dust storage box, 2 ... Tailgate, 3 ... Rotating plate, 3a ... Rotating shaft, 5 ... Pushing plate, 8 ... Cam plate, 9
...... Slit, 12 ...... Bracket, 15 ...... Detection switch.

Claims (2)

[Scope of utility model registration request] 1. A dust loading device including a rotating plate and a pushing plate is provided in a tailgate connected to a rear portion of the dust storage box,
In a control device for a garbage collection vehicle, in which these rotary plates and pushing plates cooperate to load dust in the dust storage box; a rotatable circle fixed to an end of a rotary shaft of the rotary plate. A plate-shaped cam plate, and a bracket having a fitting groove that comes into contact with the outer peripheral surface of the cam plate and receives the outer peripheral portion of the cam plate,
Spring means for connecting the bracket to the fixed portion of the tailgate and urging the bracket toward the center of the cam plate; a detection switch attached to the bracket;
The rotary plate is provided with a detected portion that is attached to indicate the rotation angle of the rotary plate and is detected by the detection switch, and the timing of the operation of the rotary plate and the pushing plate is determined by the output from the detection switch. A control device for a refuse collection vehicle characterized by being controlled. 2. The control device for a refuse collecting vehicle according to claim 1, wherein the bracket is formed of a soft resin material.