JPS6333848Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a garbage collection vehicle that automatically loads and compresses garbage using an operating plate. This relates to an anti-freeze device for control electrical equipment that eliminates the risk of damage and operates safely and reliably.

2. Description of the Related Art In general, a garbage collection vehicle uses a rotary plate to scoop up garbage placed in a garbage input box, and compresses and stores the scraped up garbage into the garbage storage box using a pusher plate.

By the way, the loading operation using the actuating plates such as the rotary plate and the pushing plate is carried out by a start switch and a detection switch whose operating order corresponds to the actuation limit position of the actuating plate, or by a relay in combination with the detection switch. This is done by switching the switching valve in the hydraulic circuit by opening and closing the valve.

FIG. 1 is a schematic diagram of an electric operating device of a general garbage loading mechanism of a garbage collection vehicle. In the drawing,
1 is a garbage input box, 2 is a garbage storage box provided in front of the garbage input box 1, 3 is a rotating plate that scrapes up the garbage placed in the garbage input box 1 to the bottom of the garbage storage box 2, and 4 is a rotating plate This is a pushing plate that pushes the garbage scooped up in step 3 into the garbage storage box 2. 5 is a cam plate, and 6 is a switch operating lever, which are attached to each end of the rotating shaft 7 of the rotary plate 3 and the pivot pin 8 of the push plate 4, and rotate on the outer surface of the side plate of the garbage input box 1. It rotates and swings together with the plate 3 and the pushing plate 4. Reference numeral 9 indicates a detection switch for stopping the rotary plate, which is arranged in correspondence with the cam plate 5 at the pushing-up stop position of the rotating plate 3, and reference numeral 10 indicates a detection switch for starting the retraction of the pushing plate, which is arranged at a predetermined avoidance angle position in the normal rotation direction. At the switch, 1 garbage input box each.
Switch bracket 2 attached to the outer peripheral surface of the side plate of
This switch bracket 24 is mounted and supported by the switch bracket 24.
A cylindrical switch cover 11, which is curved in accordance with the above, is attached and fixed to the side plate of the garbage input box 1 by a tightening member to cover the garbage disposal box 1. Reference numerals 12 and 13 indicate a detection switch for stopping the push plate backward movement and a detection switch for stopping the push plate push plate, which are arranged opposite to the operating lever 6 at the backward stop position and the push stop position of the push plate 4, and are located on the outer periphery of the side plate of the garbage input box 1, respectively. A cylindrical switch cover 14, which is attached and supported by a switch bracket 25 attached to the surface and curved to correspond to the switch bracket 25, is tightened and fixed to the side plate of the garbage input box 1 by a tightening member. Covered. 15 is a switch part of a manual operation switch 26 such as a push button switch for automatic loading operation and a plurality of push button switches for single operation, and a switch board 28 on which a relay 27 combined with the detection switch is mounted and fixed. The switch board 28 and the cover 15 constitute an operation box, which is fixed by a member, and is installed in a part of the garbage input box 1 by an appropriate means.

Problem to be Solved by the Invention However, in the conventional configuration, when the garbage collection vehicle performs a garbage loading operation in a cold season, the detection switches 9, 10, 12, 13, the manual operation switch 26, and the relay Since the control electrical equipment such as No. 27 is sealed by the covers 11, 14, 15, condensed water produced by condensation of moisture in the air inside the covers 11, 14, 15 may adhere to the control electrical equipment. This froze, causing malfunction of the contact opening/closing, making it impossible for the garbage loading operation to be carried out smoothly, and eventually leading to a failure of the drive device.

Therefore, the present invention aims to communicate the inside of the switch cover housing the control electrical equipment and the cover constituting the operation box with the atmosphere to eliminate the temperature difference between the inside and outside air, prevent condensation inside the cover, and reduce the temperature inside the cover. It is an object of the present invention to provide an anti-freeze device which prevents freezing of control electrical equipment by keeping the temperature inside the cover above the freezing temperature when the temperature falls below the freezing temperature.

Means for Solving the Problems This invention provides a garbage collection vehicle that is equipped with a hydraulic drive device and an electric operation device, and uses the control electric device to control the operation of the actuating plate to load garbage. Among the devices, the operation switch and relay are installed on the switch board, the detection switch is installed on the switch bracket, and a cover is installed on the switch board and switch bracket.
In addition to providing a vent at the lower position of the cover,
A thin, elastically deformable sheet-like heating element is disposed on the circumferential surface of the cover and at a portion that does not block the vent hole.

Function The antifreeze device with the above structure eliminates the temperature difference between the inside and outside of the cover due to the vent provided in the cover, prevents unnecessary condensation inside the cover, and when the temperature inside the cover falls below the freezing temperature, it becomes a sheet. The heating element generates heat to keep the inside of the cover above the freezing temperature and prevent the internal control electrical equipment from freezing.

Embodiment As shown in FIG. 2, this invention provides sheet-shaped heating elements 16, 17, and 18 on the upper inner circumferential surface of switch covers 11 and 14 and on the lateral inner surface of cover 15 constituting the operation box, respectively. Third
As shown in the figure and Fig. 4, the switch cover 1
1, 14 and a cover 15 constituting the operation box.
vent holes 19, 20 and 2 at respective lower positions.
1.

The sheet-like heating elements 16, 17, and 18 are thin film heaters that can be elastically deformed so that they can be easily attached to the covers 11, 14, and 15. These sheet-like heating elements 16, 17,
18 generates heat at a constant temperature when energized, and the amount of heat generated is equal to the amount of heat generated by the switch covers 11, 14 and the operation box 1.
The amount of heat generated is set so that the ambient temperature inside the chamber 5 is above the freezing temperature. In addition, sheet-like heating elements 16, 17
and 18 are connected to a power source via electric wires taken out from a part of the operation electric circuit A of the garbage loading mechanism, as shown in FIG. 5, and are operated by a snap switch 22 installed inside the cabin. In addition, 23 in Figure 5
is a pilot lamp installed inside the cabin.

According to the above configuration, the sheet-like heating elements 16, 17
Switch cover 1 due to the heat generated by and 18
The atmospheric temperature within the covers 11, 14 and 15 is raised to above the freezing temperature, the atmospheric temperature within the covers 11, 14 and 15 is raised above the freezing temperature, and the
Detection switches 9, 10, 12 in 14 and 15,
13, manual operation switch 26, etc. can be prevented from freezing.

Furthermore, since the vents 19, 20 and 21 are provided at the lower positions of the covers 11, 14 and 15, the vents 19, 20 and 21 can cause the covers 11, 14, 1
The inside of the cover 5 is communicated with the atmosphere, eliminating the difference in temperature between the inside and outside, preventing moisture in the air from condensing and accumulating inside the covers 11, 14, and 15, and increasing the internal temperature in cold weather. The resulting condensed moisture can be drained to the outside through vents 19, 20 and 21.

Effects of the invention As explained above, according to this invention, the vents provided in each cover eliminate the temperature difference between the inside and outside of the cover to prevent condensation inside the cover, and also prevent condensation from forming inside the cover when there is a risk of freezing. The sheet-shaped heating element generates heat to raise the temperature inside the cover to prevent freezing, and the condensed water generated inside is drained from the vent to control the switch part inside the cover and various detection switches, etc. It is possible to reliably prevent freezing of electrical equipment, eliminate malfunctions and malfunctions in loading operations during cold seasons, and operate safely and reliably to smoothly carry out garbage loading operations. In addition, since the sheet-like heating element is thin and has elasticity, it can be curved and arranged to match the shape of the cover, and does not require special installation space and can be easily integrated into conventional equipment. It can be attached to.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional electric operating device for a garbage loading mechanism of a garbage collection vehicle, and Figure 2 is a diagram of a garbage loading mechanism of a garbage collection vehicle to which the antifreeze device for control electrical equipment according to this invention is applied. Schematic diagram of the electric operating device of
Fig. 3 is a drawing showing the switch cover, A is a front view, B is a side view, Fig. 4 is a drawing showing the operation box, A is a front view, B is a side view, and Fig. 5 is a sheet heating element. This is an electrical wiring diagram. 1... Garbage input box, 2... Garbage storage box, 3...
Rotating plate, 4... cam, 6... switch operating lever, 9... rotating plate stop detection switch, 10...
Detection switch for starting push plate retraction, 11... Switch cover, 12... Detection switch for stopping push plate retreat, 13... Detection switch for stopping push plate push, 1
4...Switch cover, 15...Cover, 16,
17, 18... Sheet-shaped heating element, 19, 20, 2
1...Vent, 26...Manual operation switch, 28
...Switch board.

Claims (1)

[Scope of Claim for Utility Model Registration] A garbage collection vehicle that is equipped with a hydraulic drive device and an electric operating device and uses a control electric device to control the operation of an operating plate to load garbage, comprising: Of these, the operation switch and relay are mounted on the switch board, and the detection switch is mounted on the switch bracket. A cover is attached to the switch board and switch bracket, and a vent is provided below the cover, and the periphery inside the cover is 1. A freezing prevention device for control electrical equipment in a garbage collection vehicle, characterized in that a thin, elastically deformable sheet-like heating element is disposed on the surface and at a portion that does not block the vent.