JP5450031B2 - Safety switch mounting structure for garbage truck - Google Patents

Description

  In the present invention, a dust storage box is mounted on a vehicle body frame, and a dust storage box is provided at the rear of the dust storage box. The dust storage box is rotated up and down at the rear of the dust storage box. The present invention relates to a safety switch mounting structure for a dust collection vehicle that is movable.

  In the garbage collection vehicle, when the stored dust is collected in the dust storage box, the dust input box in the loading position is rotated upward to be held in the raised position (open position), and from the rear outlet of the dust storage box. Dust is to be discharged to the outside, but the worker may perform maintenance such as maintenance and inspection of the vehicle under the dust storage box while holding the dust input box in the raised position for a long time. . At this time, if the dust box is lowered by mistake, a serious accident may occur.

  Therefore, conventionally, a self-holding switch (safety switch) has been provided at a position that can be operated by the worker, and the dust is thrown by operating the switch before the worker enters under the dust throwing box in the raised position. There has already been proposed a safety device in which the box is not lowered during work and the occurrence of the accident can be prevented in advance (see Patent Document 1 below).

Japanese Utility Model Publication No. 5-12163

  However, in the thing of the said patent document 1, since the mounting position of the switch is not specified because the self-holding switch is provided in the rear part of the dust storage box, it is based on the operation of the switch cage by an operator, or a handcuff. There is a problem that it is difficult to operate.

  This invention is made | formed in view of such a situation, and it aims at providing the safety switch mounting structure of the new refuse collection vehicle which can solve the said conventional problem.

In order to achieve the above object, according to the first aspect of the present invention, a dust container is mounted on the vehicle body frame, a dust container is provided at the rear of the dust container, and the dust container has a rear end opening of the dust container. In the refuse collection vehicle, which is rotated from the closed position to the open position where the rear end opening is opened, and the stored dust in the dust storage box can be discharged.
The periphery of the rear end opening of the dust storage box is bordered by a reinforcing member, and the bracket is fixed across the extension of the reinforcing member extending downward from the bottom wall of the dust storage box and the wall surface of the dust storage box. A safety switch input member is provided on the outer surface of the bracket to invalidate the lowering operation of the dust box at the raised position.

  In order to achieve the above object, the invention according to claim 2 is the one according to claim 1, wherein the input member of the safety switch is in a position that is recessed from the outer surface of the extension portion of the reinforcing member. It is a feature.

  According to the first aspect of the present invention, since the mounting position of the input member of the safety switch can be specified, the operator can easily operate the safety switch soot, and the wall strength of the dust container can be increased.

  According to the second aspect of the present invention, the input member of the safety switch is located at a position where the input member is recessed from the outer surface of the extension portion of the reinforcing member. Therefore, the input member can be protected from disturbance, and the disturbance Can prevent erroneous operation.

Overall longitudinal sectional view of a garbage truck equipped with the safety device of the present invention Action explanatory diagram explaining the process from the dust discharge process to the next loading process Enlarged view of the phantom line encircled portion in FIG. Sectional view along line 4-4 in FIG. Perspective view of safety switch and bracket

  Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

  In FIG. 1, a dust container 1 is mounted on a vehicle body frame F of a garbage collector V, and a bottom wall f of the dust container 1 is a gently inclined surface that is rearwardly lowered.

  The rear surface of the refuse storage box 1 is inclined rearward from the upper part toward the lower part, and the rear end opening 1a is opened over the entire surface. The periphery of the rear end opening 1a is edged and reinforced by the reinforcing member 2. The reinforcing member 2 has an extension 2 e that extends downward from the bottom wall f of the dust container 1.

  The rear end opening 1a of the dust storage box 1 is continuously provided with a dust input box 3 having a dust input port 3a through which dust can be input. The upper end portion of the dust box 3 is pivotally supported 4 on the upper rear end of the dust container 1 so as to be rotatable in the vertical direction. An elevating cylinder C1 is pin-coupled 5 and 6 between the upper part of the dust container 1 and the dust input box 3, and the vertical movement of the dust input box 3 around the pivotal support 4 portion by the expansion and contraction operation of the elevating cylinder C1. 2, the dust input box 3 opens the rear end opening 1a of the dust container box 1 as shown by the solid line in FIG. 2A, and FIGS. B) As shown by the solid line (C), it can be moved at any time between the loading position (closing position) for closing the rear end opening 1a.

  In the dust input box 3, a dust volume capable of executing a loading process in which the input dust in the input box 3 is forcibly pushed into the dust container 1 when the input box 3 is in the loading position. Insertion device P is provided. The structure of the dust loading device P is known in the art and is supported so as to be able to move up and down along the guide frames 11 provided on the left and right side walls of the dust container box 3 at a position facing the rear end opening 1a of the dust container 1. A lifting and lowering body 10, a telescopic cylinder C <b> 2 that forcibly raises and lowers the lifting body 10, a compression plate 12 that is pivotally supported 13 below the elevation body 10, and a pushing cylinder that forcibly rotates the compression plate 12. C3.

  Thus, the primary compression action that is performed by lowering the lifting body 10 from the raised position to the lowered position while the compression plate 12 is held at the rear position, and the compression plate 12 that is performed while the lifting body 10 is held at the lowered position. A secondary compression action performed by forward rotation from the rear position to the front position, and a pushing action performed by raising the elevating body 10 from the lowered position to the raised position while the compression plate 12 is held at the forward position. Thus, the input dust in the dust input box 3 is forcibly pushed into the dust storage box 1.

  In addition, a discharge plate D called a general discharge plate that can be moved back and forth with respect to the dust input box 3 in the loading position is disposed in the dust storage box 1, and the dust input box 3 is in the discharge position. Sometimes the discharge plate D is retracted in the dust storage box 1 so that the storage dust in the dust storage box 1 can be forcibly discharged from the rear end opening 1a.

  The discharge plate D is composed of a discharge plate main body Dm extending over the entire width of the internal space of the dust container 1 and a support frame Ds integrally connected to the back surface of the main body. A guide mechanism G is provided between the discharge plate D and the dust container 1 so as to guide and support the discharge plate D in an upright posture so as to be slidable back and forth. The guide mechanism G is provided on the left and right sides of the support frame Ds. It is comprised by the rolling wheel or slider Ga provided in the lower part of both sides, and the guide rail Gb provided in both the left and right inner surfaces of the dust container 1.

  Between the rear surface of the discharge plate D and the dust container 1, a one-stage or multi-stage (that is, telescopic type) hydraulic discharge cylinder C 4 that drives the discharge plate D forward and backward with respect to the dust input box 3 is connected. The The discharge cylinder C4 is arranged so as to extend in the front-rear direction substantially along the bottom wall f of the dust container 1.

  Thus, according to the expansion / contraction operation of the discharge cylinder C4, the discharge plate D is positioned behind the most advanced position Df (the position indicated by the solid line (B) in FIG. 2) in the dust storage box 1 and the rear end opening 1a of the dust storage box 1. It is possible to reciprocate between the last retracted position Drr ((A) solid line position in FIG. 2) slightly overhanging. Further, a predetermined retraction position Dr ((C) solid line position in FIG. 2) which is the start position of the loading stroke is set in front of the last retreat position Drr, at the rear end opening 1a of the dust container 1 or in the vicinity thereof. The

  The garbage truck V is provided with a hydraulic circuit (not shown) for operating the on-vehicle lift cylinder C1, telescopic cylinder C2, push-in cylinder C3 and discharge cylinder C4, and hydraulic pressure for supplying hydraulic oil to the hydraulic circuit. The pump can be connected and driven to an in-vehicle engine so as to be arbitrarily connectable / disconnectable via a power take-out device PTO. Since the hydraulic circuit is conventionally known, detailed description thereof is omitted.

  Furthermore, an operation panel 8 equipped with a control device CO is provided at an appropriate position of the garbage collection vehicle V, for example, the driver's seat Vc. The control device CO controls the operation of the elevating cylinder C1, the telescopic cylinder C2, the pushing cylinder C3, and the discharge cylinder C4. The control device CO includes a safety switch Ss, which will be described later, A group of operation switches necessary for operation, such as a main switch, a raising / lowering switch for the garbage throwing box 3, a loading switch, a throwing box raising / lowering switch, and a discharge plate advance / retreat switch, are connected.

  The safety switch Ss invalidates the lowering operation of the dust throwing box 3 in the raised position by the lift switch, and immediately stops the lowering operation of the dust throwing box 3, and is located behind the dust storage box 1. It is provided at a position where an operator can easily operate.

  Hereinafter, the attachment structure of the safety switch Ss will be described with reference to FIGS. 3 to 5 together with FIG. 1. The inner surfaces of the left and right sides of the extension portion 2 e extending below the reinforcing member 2 (with the dust input box 2). The brackets 7 are welded to the lower edges of the left and right rear ends of the wall surface 1w of the refuse storage box 1 and the mounting surface side). These brackets 7 have a switch mounting portion 7a that extends in front of the front edge of the extension portion 2e of the reinforcing member 2 and below the bottom wall f of the refuse storage box 1, and this switch mounting portion 7a is The dust container box 1 is formed in an inverted triangle shape in a side view, and its front edge is formed on an inclined surface that is inclined downward toward the extension portion 2e. And the said safety switch Ss is attached with the attachment screw to the attachment hole 9 opened to the said switch attachment part 7a, The input member Ssi of the safety switch Ss exists in the outer surface of the switch attachment part 7a, and the outer side surface of the reinforcement member 2 It is in a position that is more submerged than 2o.

  Therefore, the input member Ssi of the safety switch Ss is provided on the outer surface of the mounting portion 7a of the bracket 7 located in front of the extension portion 2e of the reinforcing member 2 and below the wall surface 1w of the dust container 1 so that the input is performed. The position of the member Ssi is specified, and the worker behind the garbage throwing box 1 can operate the safety switch Ss quickly and accurately. Moreover, since the input member Ssi is in a position where it is immersed from the outer side surface 2o of the reinforcing member 2, contact with an obstacle can be prevented and protection from disturbance can be achieved. Furthermore, the bracket 7 to which the safety switch Ss is attached can reinforce the wall surface 1w of the refuse storage box 1.

Next, the operation of this embodiment will be described with reference to FIG.
[Loading process]
As shown by the solid line in FIG. 2 (C), the loading process of the input dust in the dust input box 3 by the dust loading device P is performed with the dust input box 3 in the loading position (closed position) and the discharge plate D. The process is started in a state where the dust storage box 1 is held at a predetermined retracted position Dr near the rear end.

  The dust pushed into the dust container 1 by executing the loading process is housed in the dust container 1 while being appropriately compressed between the discharge plate D and the dust loading device 2. In this case, a pressure sensor capable of detecting the compression reaction force received by the discharge plate D from the stored dust as the back pressure of the discharge cylinder C4 is provided, and when the detected pressure of the pressure sensor exceeds a predetermined value (that is, the compression reaction force). When the pressure exceeds the upper limit value, the discharge cylinder C4 is contracted to advance the discharge plate D, and when the detected pressure falls below a predetermined value, the contraction operation of the discharge cylinder C4 is stopped, and thus the dust is accommodated. As the contained dust in the box 1 increases, the discharge plate D is automatically advanced gradually in small increments.

When the discharge plate D reaches the most forward position Df indicated by the chain line in FIG. 2, the dust container 1 is filled with the stored dust.
[Discharge process]
Thereafter, the garbage collection vehicle V is moved to the garbage disposal site, and as shown by the solid line in FIG. 2A, the dust input box 3 is raised and rotated to the discharge position by the extension operation of the elevating cylinder C1, and the dust container 1 With the rear end opening 1a opened, the discharge plate D is moved backward to forcibly discharge the stored dust in the dust storage box 1.

  The discharge stroke by the rotation of the dust input box 3 to the open position is performed by, for example, moving the discharge plate D from the most advanced position Df indicated by the chain line in FIG. Further, it is performed by moving backward to a rear position (that is, the last retracted position Drr slightly overhanging from the rear end opening 1a of the dust container 1) (solid line position in FIG. 2A).

  And after completion | finish of the said discharge process, as shown to a solid line in FIG.2 (B)-(C), the shrinkage | contraction operation | movement of the raising / lowering cylinder C1 returns rotation of the refuse input box 3 to a loading position (closed position). At the same time, with the discharge plate D returned to the predetermined retracted position Dr, the discharge plate D is stopped and waited, and then the next loading process by the dust loading device P is started from this standby state.

  By the way, maintenance work such as maintenance and inspection of the dust collecting vehicle V may be performed by holding the dust throwing box 3 in the raised position and an operator entering below the dust throwing box 3. At this time, if any one of the input members Ssi of the left and right safety switches Ss is operated to the fall prevention side, the lowering operation by the raising / lowering switch of the garbage throwing box 3 is invalidated. At this time, as described above, since the input member Ssi is on the outer surface of the switch mounting portion 7a of the bracket 7 and the position thereof is specified, the operator can operate the input member Ssi even in an emergency. It can be done quickly and accurately. Moreover, since the input member Ssi is in a position where it is submerged from the outer surface 2o of the reinforcing member 2, it can be protected from disturbance. Furthermore, the switch mounting portion 7a of the bracket 7 is formed in an inverted triangular shape in a side view of the dust box 1, and its front edge is formed on an inclined surface inclined downward toward the extension portion 2e. The bracket 7 can be compactly accommodated between the extended portion 2e of the reinforcing member 2 and the wall surface 1w of the dust container 1 and this does not interfere with an obstacle.

  The bracket 7 is effective for reinforcing the six wall surfaces 1w of the dust container 1.

  After the maintenance work is completed, the input member Ssi is returned to the normal side, and the dust box 3 is lowered. Since the safety switch Ss is disposed on the side surface of the garbage collection vehicle, the safety switch Ss can be released outside the operating range of the dust collection box 3 when the dust collection box 3 is lowered, which is safe.

  As mentioned above, although the Example of this invention was described, this invention is not limited to these Examples, A various Example is possible within the scope of the present invention.

  For example, in the above embodiment, as the dust pushing device P, the type that exerts the dust pushing action by the cooperation of the lifting body 10 and the compression plate 12 is used. However, as the dust loading device of the present invention, the illustrated example is shown. In place of the structure, a dust input box is provided with a rotating plate and a push plate, and an actuator for rotationally driving them. The input dust in the dust input box is put into the dust storage box by the cooperation of both plates. A dust pushing device of a type that can be forcedly pushed in may be used.

DESCRIPTION OF SYMBOLS 1 Dust storage box 1a Rear end opening 1w Wall surface f Bottom surface 2 Reinforcement member 2e Extension part 2o Outer side surface 3 Dust input box 7 Bracket F Body frame Ss Safety switch Ssi Input member

Claims (2)

A dust storage box (1) is mounted on the vehicle body frame (F), a dust container box (3) is provided at the rear of the dust container box (1), and the dust container box (3) is disposed behind the dust container box (1). In the refuse collection vehicle, which can be rotated from the closed position for closing the end opening (1a) to the open position for opening the rear end opening (1a) so that the contained dust in the dust container (1) can be discharged.
The periphery of the rear end opening (1a) of the dust container box (1) is bordered by a reinforcing member (2), and the reinforcing member (2) extends below the bottom wall (f) of the dust container box (1). A bracket (7) is fixed across the part (2e) and the wall surface (1w) of the dust container box (1), and the dust box (3) in the raised position is fixed to the outer surface of the bracket (7). A safety switch mounting structure for a garbage truck, comprising an input member (Ssi) for a safety switch (Ss) that disables the lowering operation of the garbage collection vehicle. The input member (Ssi) of the safety switch (Ss) is located at a position where it is recessed from the outer surface (2o) of the extension (2e) of the reinforcing member (2). Safety switch mounting structure for garbage collection vehicles.

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