JP6517578B2 - Garbage truck - Google Patents

Description

The present invention relates to a special vehicle having a box-like space in a cargo bed portion and further having a discharge device for discharging a load in the box-like space to the rear of the vehicle body.
In addition, "garbage collection vehicle" is only a general name of a special vehicle equipped with a discharge device for discharging the load in the box-like space to the rear of the vehicle body, and the one accommodated in the box-like space is limited to dust. It is not a thing.

A refuse collection vehicle is known as a vehicle that collects and transports general waste discharged from a home and raw waste discharged from a restaurant (Patent Document 1).
FIG. 28 is a reproduction of the drawing of the refuse collection vehicle attached to Patent Document 1. The dust collection vehicle 200 is provided with a dust collection box 201 at the loading part of the truck as in Patent Document 1. In the prior art, the dust collection box 201 is a box integrally made of a welded structure, and the rear end side is open. A dust input box 202 is attached to the opening at the rear end of the dust collection box 201.
As shown in FIG. 28, the dust input box 202 is attached so that the opening of the dust collection box 201 can be opened and closed. When the dust input box 202 is closed, the dust collection box 201 is substantially sealed.

A discharge device 203 is built in the dust collection box 201 of the dust collection vehicle 200. The discharge device 203 is, for example, a member having a discharge plate 205, and the cylinder 206 is connected to the discharge plate 205.
The discharge plate 205 is always at the front end (driver's side) in the dust collection box 201. Then, by extending the cylinder 206, the discharge plate 205 moves to the opening side of the rear end of the dust collection box 201, and pushes out the dust and the like in the dust collection box 201 to the outside.

JP, 2013-56778, A

Not only garbage but also larger ones called “oversized trash” are rubbed from homes. For example, furniture such as children's desks and chairs and shelves that are no longer needed, waste discharged from gardens such as dead branches and flower pots, and electrical appliances are also discharged from homes.
In addition, although the refuse collection vehicle of this invention does not limit the thing to collect to refuse, in order to demonstrate easily, the following description demonstrates as what collects refuse. Also, in order to distinguish the properties of the waste, the expressions "raw garbage" and "oversized trash" are used.
The “garbage” is an article having a small size of the individual articles and having extremely low rigidity, and the “rough waste” is an article having a large size of the individual articles and having a high rigidity.

  Collection work of waste discharged from home is often carried out by local public organizations, and local public organizations often collect not only raw garbage but also "oversized rubbish" such as children's desks and chairs.

The waste collection vehicle 200 as disclosed in Patent Document 1 described above is suitable for collecting raw waste. However, "coarse waste" may be collected without being deformed by compression or the like so that it can be disassembled and disassembled for recycling. For this reason, the waste collection vehicle 200 which is compressed and collected in the waste input box 202 is not suitable for collecting “oversized waste”.
On the other hand, separately providing a garbage collection vehicle 200 for garbage as disclosed in Patent Document 1 and a collection vehicle for "oversized garbage" increases the purchase cost and places the vehicle in a place I also hesitate.
In particular, it is difficult for a local public organization with a small population and a small budget scale to separately provide a garbage collection vehicle 200 for garbage and a collection vehicle for "oversized garbage".

Then, this invention makes it a subject to develop the special vehicle which can be utilized for both the application which collects garbage, and the application which collects coarse garbage.
In particular, the present invention is directed to the development of a refuse collection vehicle that can prevent the movement of equipment during a collection operation to hit an operator.

  The invention according to claim 1 for solving the above-mentioned problems has a driver's seat in the area on the front side of the vehicle body, a loading area on the rear side, and the loading area for storing the load. In the dust collection vehicle having a box-like space and having a discharge device for discharging the load in the box-like space to the rear of the vehicle body, the box-like space includes at least a bed portion forming a floor portion and a cover covering the bed portion The cover member is covered by a plurality of cover pieces and has a rear end cover piece disposed at least at the rear end of the loading area and a central cover piece disposed adjacent thereto; The two cover pieces are movable in the longitudinal direction of the vehicle body, and constitute a closed state in which the cover member entirely covers the side surface of the box-like space and an open state in which part or all of the side surface of the box-like space is open Before it is possible The cross-sectional area of the rear end cover piece is larger than the cross-sectional area of the central cover piece, and in the open state in which the cover piece is moved to open the side of the box-like space The end cover piece is in a state of covering, and the center cover piece has a locking portion projecting outward, the locking portion abuts against a part of the rear end cover piece, and the central cover piece exceeds the predetermined amount and the rear end cover It is a refuse collection vehicle characterized by preventing moving behind a piece.

In the refuse collection vehicle of the present invention, the driver's seat is in the area on the front side of the vehicle body, and the loading area is on the rear side. Hereinafter, in the present specification, the driver's seat side is referred to as "front side" or "front side", and the opposite side is referred to as "rear side" or "rear side". Also, the "front-rear direction of the vehicle body" may be simply referred to as "the front-rear direction".
The dust collection vehicle of the present invention has a structure corresponding to the dust collection box 201 by the loading part and the cover member.
And in the refuse collection vehicle of this invention, two cover pieces can be moved to the front-back direction of a vehicle body, and can be in the open state which open | releases a part or all of the side of box-like space. Therefore, large-sized waste such as a child desk or a chair can be directly thrown in from the side of the vehicle, and large-sized waste can be efficiently collected.
Of course, the garbage collection vehicle of the present invention can also be used to collect food waste.
According to the dust collection vehicle of the present invention, since the discharge device for discharging the load in the box-like space to the rear of the vehicle body is provided, it is possible to efficiently discharge food waste and bulky waste in the box-like space.
In the present invention, the cross-sectional areas of the plurality of cover pieces are large and small, and the cross-sectional area of the rear end cover piece is larger than the cross-sectional area of the central cover piece. That is, in the present invention, the cross-sectional area of the cover piece is made larger as it is on the rear end side. Therefore, in the refuse collection vehicle of the present invention, when the load in the box-like space is discharged, the load is not easily caught and can be smoothly discharged.
That is, when discharging the dust, the dust moves from the front to the back. Therefore, if the cross-sectional area in the traveling direction of the dust is small, the dust may be compressed or caught. Therefore, in the present invention, the cross-sectional area of the rear end cover piece is made larger than the cross-sectional area of the central cover piece, so that the cross-sectional area becomes larger in the advancing direction of the dust.
Further, the present invention has a function of preventing the cover piece from moving during the operation of throwing in the dust.
That is, in the garbage collection vehicle of the present invention, when throwing in the garbage, the side of the box-like space is opened so that the garbage collection vehicle is opened. It is expected that the piece will fall along the slope of the slope and close the open part or the operator will be caught in the cover piece.
In particular, if the central cover piece passes over the rear end cover piece and moves to the rear end side, the central cover piece pops out from the inside of the rear end cover piece, so the operator is caught by surprise and the central cover There is a concern that the pieces hit the body and cause injury.
Therefore, it is necessary to fix the cover piece so as not to move during loading work, but in the open state, the central cover piece is accommodated inside the rear end cover piece, and the central cover piece It is difficult to fix.
Therefore, in the present invention, the center cover piece is provided with a locking portion protruding outward, and the locking portion is brought into contact with a part of the rear end cover to prevent the central cover from going rearward much more than the rear end cover. I decided.
According to the present invention, the central cover does not move backward greatly beyond the rear end cover during the collecting operation, which is highly safe.
Preferably, the position of the locking portion is closer to the front than the center in the front-rear direction of the central cover piece.

  In the invention according to claim 2, the cover member has a coupling means for temporarily coupling the rear end cover piece and the central cover piece, and in the open state, the two cover pieces are coupled by the coupling means. A refuse collection vehicle according to claim 1, characterized in that it is possible.

  According to the present invention, the relative movement of the central cover piece with respect to the rear end cover piece can be restricted, thereby further enhancing the safety.

  The invention according to claim 3 is characterized in that the two cover pieces are connected by the connecting means in the open state, and the rear cover piece keeps the state in which the rear cover piece covers the outside of part or all of the central cover piece. The dust collection vehicle according to claim 2, wherein the cover piece is movable in the front-rear direction.

  According to the present invention, when the dust in the box-like space is caught on the central cover piece when the cover member is closed from the open state, the rear end cover piece does not get in the way and it is easy to remove. .

  In the invention according to claim 4, the coupling means includes an engagement portion and a lock portion engaged with the engagement portion, the engagement portion is attached to the central cover piece, and the lock portion is The lock portion is attached to the rear end cover piece, and the lock portion has a lock portion side engagement piece and a release means, and when the engagement portion is caused to collide with the lock portion, the lock portion engagement is performed by the force at that time. The refuse collection vehicle according to claim 2 or 3, wherein the engagement piece is moved to hold the engagement portion, and the release portion is operated to open the engagement portion. It is.

  In the dust collection vehicle of the present invention, the rear end cover piece can be coupled to the central cover piece by moving the rear end cover piece and causing the lock portion to collide with the engagement piece on one side of the central cover. Therefore, no effort is required to connect the rear end cover piece and the center cover piece.

  In the invention according to the fifth aspect, the locking portion is located on the side surface of the cover piece, and has a handle portion extending in the longitudinal direction at a distance from the side wall of the cover piece, and the side wall of the handle portion and the cover piece It is a refuse collection car according to any one of claims 2 to 4 which has a support part to connect, and the support part concerned functions as an engaging part of said connecting means.

  In the dust collection vehicle of the present invention, the locking portion can double as the engaging portion of the coupling means. Further, the cover piece can be moved by operating the handle portion of the locking portion.

  The invention according to claim 6 has a front end cover piece at the front position of the loading area, and the front end cover piece is immovably fixed to the loading section, and in the open state, the front cover piece The rear end cover piece is on the front side, the central cover piece covers the outer side of the front end cover piece, and the outer side of the central cover piece is covered by the rear end cover piece. In the closed state, the front end cover piece is on the front side, the central cover piece is behind it, and the rear end cover piece is behind it, and the vicinity of the end of adjacent cover pieces overlap each other; The refuse collection vehicle according to any one of claims 1 to 5, wherein the side face of the box-like space is covered without any gap by the individual cover pieces.

In the dust collection vehicle of the present invention, when the box-like space is opened, the rear end cover piece and the center cover piece are both moved forward.
Here, in the refuse collection vehicle of the present invention, in the open state, the central cover piece covers the outer side of the front end cover piece, and the rear end cover piece covers the outer side of the central cover piece. That is, in the present invention, the cross-sectional area of the central cover piece is larger than the cross-sectional area of the front end cover piece. Therefore, even if dust is already contained in the box-like space, the moving central cover piece moves outside the front end cover piece. That is, since the front end cover piece fixed to the loading platform is on the innermost side, it moves outside the front end cover piece when the other center cover piece and the rear end cover piece overlap the front end cover piece.
Therefore, in the refuse collection vehicle of the present invention, when the central cover piece is moved, the central cover piece can be easily moved with relatively little chance of rubbing against the dust contained therein.
The same applies to the rear end cover piece, and when moving the rear end cover piece so as to open the box-like space, there is relatively little chance of rubbing against the dust inside, and the rear end cover piece can be moved easily. it can.

  The refuse collection vehicle of the present invention can be used both for collecting garbage and for collecting coarse garbage. In addition, the refuse collection vehicle of the present invention is less likely to be touched by a finger or the like on the cover piece, and is highly safe.

It is a front view of the refuse collection vehicle of embodiment of this invention. It is the perspective view observed from the vehicle back of the refuse collection vehicle of FIG. It is a disassembled perspective view of the loading area | region of the refuse collection vehicle of FIG. 1, and shows the state divided | segmented into the cover member which covers a loading platform and a loading platform. It is a perspective view of the loading area of the refuse collection car of Drawing 1, and shows the state where a back lid was opened. It is a perspective view of the loading area | region of the refuse collection vehicle of FIG. 1, and shows the state which open | released the rear end of the loading platform with opening a back lid. It is a perspective view of the loading area | region of the refuse collection vehicle of FIG. 1, and shows the open state which open | released the side of box-like space. It is a disassembled perspective view of a cover member, and shows the state which observed each cover piece from the back and the upper part. It is an exploded perspective view of a cover member, and shows a state where each cover piece is observed from the front and the lower side. It is the front view which displayed the loading platform part and cover member of the refuse collection car of Drawing 1 typically, and shows the state which moved the back end cover piece ahead and covered the outside of the central cover member ( In b), the rear end cover piece and the central cover member are moved forward so that the central cover member covers the outside of the front end cover and the rear end cover piece covers the outside to partially open the side of the box-like space Indicates an open state. It is the front view which displayed the loading platform part and cover member of the refuse collection car of Drawing 1 typically, and shows the open state which partially opened the side of box-like space, (b) is of (a) After the state, the rear end cover piece and the central cover member are shown to be moved backward together with the central cover member joined with the joint member, and (c) shows the rear end cover piece after releasing the joint member after the state of (b). Is moved further rearward to close the box-like space. It is the front view which displayed the loading platform and cover member of the refuse collection car of Drawing 1 typically, and the engagement member provided in the overlapping part of the ceiling wall of cover pieces and the overlapping part of a side wall, and movement of a cover piece And fixing means to prevent It is the top view which displayed the loading platform and cover member of the refuse collection car of Drawing 1 typically, and includes the engagement member provided in the overlapping part of the ceiling walls of a cover piece, and (a) shows a closed state, (B) shows an open state. It is the front sectional view which displayed the loading platform part and cover member of the refuse collection car of Drawing 1 typically, (a) shows a closed state, (b) moves the back end cover piece ahead and it is central cover member (C) shows the case where the rear end cover piece and the central cover member are moved forward to cover the outer side of the front end cover with the central cover member and the outer side covered by the rear end cover piece. It shows an open state in which the side surface of the ring-like space is partially open. It is a front sectional view which displayed the refuse collection truck of Drawing 1 typically, and (a) is a closed state and shows the state where refuse was stored in box-like space, (b) shows a discharge board back. It shows a state where it is moved and the dust in the box-like space is discharged to the rear. The engagement member provided in the overlapping part of the ceiling walls of the cover piece of the dust collection car of FIG. 1 is shown, (a) moves the rear cover piece to the rear and joins the engagement pieces together (B) shows a state in which the rear cover piece moves backward and the engagement pieces are connected, and (c) shows a rear cover piece moves forward and the connection of the engagement pieces is released. Show the condition. It is the arrow line view which observed the cover member from A direction of FIG. 3, and its enlarged view. (A) is the arrow line view which observed the cover member from A direction of FIG. 11, and its enlarged view, (b) is the arrow line view which observed the cover member from B direction of FIG. 11, and its enlarged view. It is a perspective view of the engagement member provided in the overlapping part of the side wall of cover pieces. It is an enlarged view of a back end cover piece and a center cover piece just before a back end cover piece moves ahead, and covers an almost whole of a center cover piece. FIG. 20 is an enlarged view of the rear end cover piece and the central cover piece in a state where the rear end cover piece is further moved forward from the state of FIG. 19 to cover substantially the entire central cover piece and the coupling means are coupled. It is an A direction arrow line view of FIG. It is a perspective view of a fixing means which prevents movement of a cover piece. It is a disassembled perspective view of the fixing means of FIG. It is sectional drawing of the fixing means of FIG. 22, (a) shows the state which fixing was cancelled | released, (b) shows a fixing state. It is a hydraulic circuit that drives the discharge device. It is an electrical circuit that drives the ejector. It is a front sectional view of the refuse collection car of Drawing 1, and the state where a discharge board moved to the back is shown. It is a front view of the refuse collection vehicle of a prior art. (A) (b) (c) (d) is a front view which shows the structure and operation | movement of the modification of a coupling means. (A) (b) (c) is a front view which shows the structure and operation | movement of the other modification of a coupling means.

Hereinafter, embodiments of the present invention will be further described.
The refuse collection vehicle 1 of this embodiment is a truck body 2 in which a refuse collection box 3 is mounted as shown in FIG.
The truck body 2 is known and has a driver's seat 5 ahead.
The dust collection vehicle 1 of this embodiment has the driver's seat 5 in the area on the front side of the vehicle body similar to that of the known one, the loading area 6 is on the rear side, and the loading area 6 The floor surface, the side surface, and the top surface are covered, and a box-like space 7 for containing a load is formed.

In the present embodiment, the dust collection box 3 is configured by the loading section 8 and the cover member 10 as shown in FIG.
The loading unit 8 forms the lower side of the floor and the side of the waste collection box 3. In other words, the loading portion 8 is a member that covers a part of the floor portion and the side surface of the box-like space 7.
Moreover, the cover member 10 forms the ceiling wall of the refuse collection box 3, and the upper side of a side. In other words, the cover member 10 is a member that covers the ceiling wall and a part of the side surface of the box-like space 7.
Further, a discharge device 11 is disposed in the dust collection box 3.

Each member will be described below.
The loading section 8 has a structure similar to that of a known loading section of a truck, and the floor plate 12 and the left and right side wall plates 13 are integrally provided, and the cross-sectional shape has a "concave" shape.
The left and right side wall plates 13 are integrally welded to the floor plate 12 and can not be moved relative to the floor plate 12 or to be changed in position.

Guide grooves 22 and 23 are provided on the outer side surfaces of the left and right side wall plates 13 and in the vicinity of the upper end. The guide grooves 22 and 23 extend in the horizontal direction along the longitudinal direction of the side wall plate 13.
Hole members 25 and 26 are provided on the outer side surface of the left and right side wall plates 13 with a distance in the front-rear direction.
The hole member 25 provided on the front side of the vehicle is a plate provided with a through hole, and is a front position in the front-rear direction of the vehicle body and slightly lower than the guide grooves 22 and 23 in the height direction. Is provided horizontally. Therefore, the axis of the through hole is in the vertical direction.
The position of the hole member 25 in the front-rear direction of the vehicle body is a position immediately below the lowering member 71 described later when the cover member is in the open state.

The hole member 26 provided on the front side of the vehicle is not a complete ring shape in plan view, but is a hole that is partially missing, and has a wedge shape in plan view as shown in FIG. The mounting position of the hole member 26 is provided on the rear side in the front-rear direction of the vehicle body, and is horizontally provided at a position slightly lower than the guide grooves 22 and 23 in the height direction.
In the vicinity of the hole member 26, a noncontact proximity switch 27 is provided. The proximity switch 27 detects whether or not the lowering member 71 described later engages with the hole member 26.
The proximity switch 27 is a fixing detection means for detecting that the rear end cover piece 32 is fixed by the lowering member 71, and is also a closed state detecting means for detecting that the cover member 10 is in a closed state.
In place of the proximity switch 27, a known detection device such as a contact type (mechanical type) limit switch or a photoelectric switch can be employed.
The position of the hole member 26 in the front-rear direction is a position immediately below the lowering member 71 described later when the cover member is in the closed state.

On the rear end side of the loading section 8, three doors 15, 16 and 17 are provided. Each of the three doors 15, 16, 17 can be rocked manually, and the posture can be changed from the closed state as shown in FIG. 4 to the open state as shown in FIG.
That is, a lower opening door 17 and a pair of double doors 15 and 16 are provided on the rear end side of the loading platform 8.
The lower opening door 17 has a length corresponding to the entire width of the loading portion 8, and the width is about one third of the height of the side wall plate 13.
The lower opening door 17 is connected to the rear end of the floor plate 12 of the loading section 8 by a hinge (not shown) on the long side. Therefore, the lower opening door 17 swings with a virtual axis which is perpendicular to the axis of the track body 2 and is horizontal as a swing axis, and the lower portion of the rear end side of the loading section 8 as shown in FIGS. It is possible to take a closing position and an opening position at the rear end side of the loading section 8 as shown in FIGS.
Further, the lower opening door 17 has a fixing tool 20 fixed so as to maintain the closed position as shown in FIGS.

Each of the double doors 15 and 16 has a total length of one half of the full width of the loading portion 8 and a width of about two thirds of the height of the side wall plate 13.
The double doors 15 and 16 are connected to the rear end of the side wall plate 13 of the loading unit 8 by a hinge 18. Therefore, the double doors 15, 16 are at the rear end of the loading unit 8 and swing with the vertical virtual axis as the swing axis.
As shown in FIGS. 3 and 4, the double doors 15 and 16 have an attitude for closing the rear end side of the bed portion 8 and an attitude for opening the rear end side of the bed portion 8 as shown in FIGS. it can.
In addition, the double doors 15, 16 have fixtures 21 fixed so as to maintain the closed position as shown in FIGS.

By making both the lower opening door 17 and the double door 15 and 16 open, the rear end side of the loading section 8 can be entirely open as shown in FIGS.
Further, by bringing the lower opening door 17 and the double door 15 and 16 into a closed state, the rear end side of the loading section 8 can be completely closed as shown in FIGS.

  The discharge unit 11 is attached to the loading unit 8. The discharge device 11 is configured of a discharge plate 28 and a pressing cylinder 24. The discharge plate 28 is a plate having a size corresponding to the cross-sectional area of the box-like space 7 in the dust collection box 3.

The hydraulic circuit for driving the discharge device 11 is as shown in FIG. 25 and the electric circuit is as shown in FIG.
A hydraulic circuit 130 for driving the discharge device 11 includes a hydraulic pump 131 and an electromagnetic valve 132 in addition to the pressing cylinder 24 described above. The hydraulic circuit 130 is also provided with a relief valve 133.
In the present embodiment, the hydraulic pump 131 is driven by the engine 135.
The solenoid valve 132 is a known three-position four-way solenoid valve, the first position 136 flows the hydraulic fluid forward, the second position 137 stops the flow of hydraulic fluid, and the third position 138 the hydraulic fluid Run in the opposite direction.

The discharge side of the hydraulic pump 131 is connected to one of the inlet ports of the solenoid valve 132. In addition, piping that returns to the tank 140 is connected to another one of the introduction side ports of the solenoid valve 132.
The two discharge ports of the solenoid valve 132 are connected to the pressing cylinder 2.
A relief valve 133 is interposed between the hydraulic pump 131 and the solenoid valve 132.
In this embodiment, the hydraulic pump 131 is driven by the engine 135 and the solenoid valve 132 is set to the first position, whereby the pressing cylinder 2 is extended, and the discharge plate 28 moves toward the rear of the vehicle.
Conversely, by setting the solenoid valve 132 to the third position, the pressing cylinder 2 is contracted, and the discharge plate 28 moves toward the front of the vehicle.
By setting the solenoid valve 132 to the second position, the pressing cylinder 2 is stopped and the discharge plate 28 is stopped.

The solenoid valve 132 has a left solenoid SOLL and a right solenoid SOLR. By energizing the left solenoid SOLL, the solenoid valve 132 is at a first position, the pressing cylinder 2 is extended, and the discharge plate 28 faces the rear of the vehicle. Move.
By energizing the right solenoid SOLR, the solenoid valve 132 is in the third position, the pressing cylinder 2 is contracted, and the discharge plate 28 moves toward the front of the vehicle.
When none of the solenoids are energized, the solenoid valve 132 is at the second position, the pressing cylinder 2 is stopped, and the discharge plate 28 is stopped at that position.

  The energizing circuit 150 for the solenoids SOLL and SOLR of the solenoid valve 132 is as shown in FIG. 26 and is largely constituted by the left solenoid side energizing circuit 151 and the right solenoid side energizing circuit 152.

  The left solenoid-side energizing circuit 151 includes a battery 148, a forward direction activation switch BS1 operated by the operator to move the discharge plate 28 in the dust discharge direction (backward), and a stop operated by the discharge plate 28 to stop. The switch BS2 is configured by the first relay RA and the left solenoid SOLL. The first relay RA has at least a relay first contact RAS1 and a relay second contact RAS2.

The right solenoid side energizing circuit 152 is a battery 148, a forward direction activation switch BS3 operated when the operator moves the discharge plate 28 in the dust discharge direction (backward), and a stop operated when the discharge plate 28 is stopped. It is comprised by switch BS4, 2nd relay RA, and right solenoid SOLR. The first relay RA has at least a relay first contact RAS1 and a relay second contact RAS2.
The stop switch BS2 of the left solenoid side energizing circuit 151 and the stop switch BS4 of the right solenoid SOLR side energizing circuit 152 interlock with each other.

The left solenoid side energizing circuit 151 and the right solenoid side energizing circuit 152 are substantially the same circuit, so the left solenoid side energizing circuit 151 will be described as a representative.
In the left solenoid-side energizing circuit 151, the forward direction activation switch BS1 and the first relay RA are connected in series, and a self-holding circuit is formed by the relay first contact RAS1 of the first relay RA.
The stop switch BS2 is also connected in series to the first relay RA. The stop switch BS2 is a B contact, which is normally in an energized state, and is a switch that shuts off the circuit when the operator operates it.
The left solenoid SOLL is connected in parallel with the first relay RA. A contact 27a linked to the proximity switch 27 and a relay second contact RAS2 of the first relay RA are connected in series to the left solenoid SOLL.

According to the present embodiment, when the operator operates the forward direction activation switch BS1, the first relay RA is self-held and the relay second contact RAS2 is energized, so if the proximity switch 27 is energized, left The solenoid SOLL is energized, the solenoid valve 132 is at the first position, the pressure cylinder 2 is extended, and the discharge plate 28 moves toward the rear of the vehicle.
When the operator operates the stop switch BS2, the self-holding of the first relay RA disappears, and the pressing cylinder 2 stops.

In the right solenoid side energizing circuit 152, in the right solenoid SOLR, the contact 27b linked to the proximity switch 27 and the relay second contact RBS2 of the second relay RB are connected in series.
When the operator operates the reverse direction activation switch BS3, the second relay RB is self-held and the relay second contact RBS2 is energized, so that if the proximity switch 27 is energized, the right solenoid SOLR is energized, The solenoid valve 132 is at the third position, the pressing cylinder 2 is contracted, and the discharge plate 28 moves toward the front of the vehicle.
Further, when the operator operates the stop switch BS4, the self-holding of the second relay RB is cancelled, and the pressing cylinder 2 is stopped.

However, when the proximity switch 27 does not detect that the rear end cover piece 32 is fixed by the dropping member 71, the power feeding circuit leading to the left solenoid SOLL is disconnected, and the left solenoid SOLL is not energized.
Similarly, when the proximity switch 27 does not detect that the rear end cover piece 32 is fixed by the dropping member 71, the power feeding circuit leading to the right solenoid SOLR is also disconnected, and the right solenoid SOLL is not energized.
Therefore, when the proximity switch 27 does not detect that the rear end cover piece 32 is fixed by the dropping member 71, neither of the solenoids SOLL and SOLR is energized, and the solenoid valve 132 is at the second position. 2 stops and the discharge plate 28 stops on the spot.

Although FIG. 26 shows a relay circuit, an electric circuit using a PLC (programmer pull logic controller) may be employed instead. That is, the electric circuit may be configured by the left solenoid side energizing circuit 151 and the right solenoid side energizing circuit 152 by a PLC (programmable logic controller) and a solenoid. In this case, when the start switches BS1 and BS3 are ON, the stop switches BS2 and BS4 are OFF, and the proximity switch 27 is detected, the logic circuit (ladder logic) for energizing the solenoid is input to the PLC.
Also, the activation switch may not be self-holding. In this case, for example, the start switch is a toggle switch which can be switched to three positions of "cylinder extension", "stop" and "contract", and automatically returns to the "stop" position. The cylinder will only expand and contract while continuing to push "stretch" or "shrink".

Next, the cover member 10 will be described. In the present embodiment, the cover member 10 is constituted by three cover pieces 30, 31, 32. Hereinafter, the cover pieces 30, 31, 32 will be referred to as the front end cover piece 30, the center cover piece 31, and the rear end cover piece 32, corresponding to the mounting position in the closed state (FIG. 1).
The front end cover piece 30, the center cover piece 31, and the rear end cover piece 32 have a common configuration and a unique configuration. First, a configuration common to the front end cover piece 30, the center cover piece 31, and the rear end cover piece 32 will be described.

The cover pieces 30, 31 and 32 are all made by welding steel plates of about 2 mm to 4 mm, and the cross-sectional shape is a "concave" shape that is generally open downward.
That is, the cover pieces 30, 31, 32 each have ceiling walls 35a, b, c and left and right side walls 36a, b, c, 37a, b, c hanging from both ends of the ceiling walls 35a, b, c. ing.
Therefore, the cover pieces 30, 31, 32 have a shape in which three sides are covered by the ceiling walls 35a, b, c and the side walls 36a, b, c, 37a, b, c on the left and right.

The ceiling walls 35a, b, c of the cover pieces 30, 31, 32 are formed with an uneven shape in order to secure rigidity.
More specifically, the ceiling walls 35a, b and c of the cover pieces 30, 31 and 32 are all high in the central portion and flat. The peripheral portions of the ceiling walls 35a, b and c of the cover pieces 30, 31 and 32 are lower in height than the central portion and flat.
Therefore, the ceiling walls 35a, b, c of the cover pieces 30, 31, 32 have a high ceiling portion 38 at the central portion, and low ceiling portions 40, 41 at the peripheral portions. An inclined wall 42 is formed between the two as shown in FIG.

The same applies to the left and right side walls 36a, b, c, 37a, b and c of the cover pieces 30, 31 and 32, and there are an overhang 43 projecting outward and a concave groove 68 recessed inwardly.
The overhanging portion 43 and the recessed groove portion 68 are both strip-shaped vertical walls, and extend in the horizontal direction. Boundary portions between the overhanging portion 43 and the recessed groove portion 68 are inclined walls 49a, b, c.

The lower foot portion 47 of the left and right side walls 36a, b, c, 37a, b, c is slightly expanded. The boundary portions between the above-described recessed groove portion 68 and the lower foot portion 47 are inclined walls 48a, 48b and 48c.
A roller 34 is provided on the center cover piece 31 and the rear end cover piece 32 inside the lower foot portion 47 as shown in FIGS. 7 and 8.
The roller 34 is a combination of a vertical support roller 34a freely rotating around a horizontal axis and a horizontal anti-vibration roller 34b freely rotating around a vertical axis, as in the circle of FIG.
The front end cover piece 30 has no roller.

  Round bars 58a, b, c are welded to the front open ends of the cover pieces 30, 31, 32 for reinforcement as shown in FIG. The round bars 58a, b, c are made of steel, and the entire shape is bent into a “concave” shape along the shape of the open end of each cover piece 30, 31, 32. It welds in the state closely_contact | adhered to the front opening end.

Next, different points of the cover pieces 30, 31, 32 will be described.
The cover pieces 30, 31, 32 have large and small cross-sectional shapes, and the cross-sectional area of the cover pieces 30, 31, 32 attached to the rear side is larger. The cross-sectional area is determined by the height of the cover piece and the horizontal distance from the outside of the left side wall 36a, b, c to the outside of the right side wall 37a, b, c.
That is, the center cover piece 31 is larger in height and width than the front end cover piece 30 adjacent to the front side. Therefore, the center cover piece 31 can cover the outside of the front end cover piece 30 completely.
Similarly, the rear end cover piece 32 is larger in both height and width than the central cover piece 31 adjacent to the front side. Therefore, the rear end cover piece 32 can cover the outside of the center cover piece 31 completely.

Further, as described above, the ceiling walls 35a, b, c of the cover pieces 30, 31, 32 have the high ceiling portion 38 at the central portion and the low ceiling portions 40, 41 at the peripheral portions. The positions of 38 and the low ceiling portions 40, 41 differ depending on the cover pieces 30, 31, 32, and are at offset positions.
That is, as shown in FIG. 7, the width of the high ceiling portion 38 a of the front end cover piece 30 is smaller than the width of the high ceiling portion 38 b of the center cover piece 31. Further, the width of the high ceiling portion 38 b of the center cover piece 31 is smaller than the width of the high ceiling portion 38 c of the rear end cover piece 32.
Therefore, the position of the inclined wall 42 of the ceiling wall 35a, b, c of each cover piece 30, 31, 32 is deviated, and the position of the inclined wall 42a of the front end cover piece 30 is inward of the other cover pieces 31, 32. The position of the inclined wall 42c of the rear end cover piece 32 is outside the other cover pieces 30 and 31. The position of the inclined wall 42b of the central cover piece 31 is in the middle between the inclined walls 42a and 42c of the other cover pieces 30 and 32.

Therefore, when the positional relationship between the cover pieces 30, 31 and 32 is in the closed state, the cover piece 31 on the outside as shown in FIG. 16 in the overlapping portion of the ceiling walls 35a, 35b of the cover pieces 30, 31 and 32. Spaces 45 and 46 surrounded by the inner surface 32 and the outer surfaces of the inner cover pieces 30 and 31 are formed. That is, in the outside of the ceiling wall 35 a of the front end cover piece 30 and the inside of the ceiling wall 35 b of the center cover piece 31, a parallelogram space 45 is formed.
A parallelogram space 46 is also formed on the outside of the ceiling wall 35 b of the center cover piece 31 and the inside of the ceiling wall 35 c of the rear end cover piece 32.

And outside engagement pieces 50a, as shown in FIGS. 7 and 8 on the outside and inside of the ceiling walls 35a, b and c of the cover pieces 30, 31 and 32, respectively, at positions corresponding to the aforementioned spaces 45 and 46. The b and the inner engagement pieces 51a and 51b are provided one on the left and one on the right. The outer engagement piece 50a constitutes an inner engagement piece 51a and a pair of engagement members, and the outer engagement piece 50b constitutes an inner engagement piece 51b and a pair of engagement members.
In the present embodiment, each of the outer engagement piece 50 and the inner engagement piece 51 is obtained by cutting the “L” -shaped steel short as shown in FIGS. 7, 8, 12, and 15, and the cross-sectional shape is “L”. It is a type. That is, the engagement pieces 50 and 51 are members having two inclined walls 52a and 52b, and the two inclined walls 52a and 52 intersect at a right angle.

The outer engagement pieces 50 are provided at the rear ends of the cover pieces 30 and 31 and outside the ceiling walls 35a and 35b. That is, the attachment positions of the cover pieces 30 and 31 of the outer engagement piece 50 in the front-rear direction are the rear ends of the cover pieces 30 and 31. Further, the mounting attitude of the outer engagement piece 50 is a state in which it protrudes to the outside of the ceiling walls 35a and 35b.
The inner engagement pieces 51 are attached to the front ends of the cover pieces 31 and 32 and to the inside of the ceiling walls 35b and c. That is, the attachment position of each cover piece 31, 32 of the inner engagement piece 51 in the front-rear direction is the front end of each cover piece 30, 31. Further, the attachment attitude of the outer engagement piece 51 is in a state of hanging down to the inside of the ceiling walls 35b and c.

The outer engagement piece 50 and the inner engagement piece 51 are obtained by arranging the cut end faces of the short-cut “L” -shaped steel in the vertical direction.
Each of the engagement pieces 50 and 51 is attached in such a direction that the two inclined walls 52a and 52b open toward the rear end side.
The cover pieces 30, 31, 32 will be individually described below.

Focusing on the front end cover piece 30, as shown in FIG. 7, two outer engagement pieces 50a are provided side by side at the rear end of the front end cover piece 30 and outside the ceiling wall 35a. The direction of the outer engagement piece 50a is a direction in which the two inclined walls 52a and 52b open toward the rear end side and converge on the front side, and each inclined wall 52a and 52b is identical to the axis of the track body 2 It is a posture inclined to an angle (45 degrees). Each inclined wall 52a, b is in a vertical posture with respect to the ceiling wall 35a.
The attachment position of the outer engagement piece 50a in the width direction is the low ceiling portions 40a and 41a and a position near the high ceiling portion 38a. That is, the two inclined walls 52a and 52b of the outer engagement piece 50a are at positions corresponding to the above-described parallelogram space 45 and are erected from the lower side to the upper side, with respect to the axis of the track body 2. Tilt to 45 degrees.

  Focusing on the central cover piece 31, as shown in FIG. 7, the outer engagement piece 50b is provided at the rear end of the central cover piece 31 and outside the ceiling wall 35b. The shape, posture, mounting position and direction of the outer engaging piece 50b are the same as those of the front end cover piece 30 described above, and the two inclined walls 52a and 52b open toward the rear end, and the mounting position is a low ceiling The positions 40b and 41b are closer to the high ceiling portion 38b. The two inclined walls 52a and 52b of the outer engagement piece 50b are located at positions corresponding to the above-described parallelogram space 46 and are erected from the lower side to the upper side of the track main body 2 Tilt to a degree.

Further, inside the central cover piece 31, as shown in FIG. 8, an inner engagement piece 51a is provided. In FIG. 8, the direction of observation is opposite to that in FIG. 7 described above, and the cover pieces 30, 31, 32 are observed from the front side and the lower side.
That is, as shown in FIG. 8, an inner engagement piece 51a is provided at the front end of the central cover piece 31 and inside the ceiling wall 35b. The direction of the inner engagement piece 51a is a direction in which the two inclined walls 52a and 52b open toward the rear end side and converge on the front side, and each inclined wall 52a and 52b is the same with respect to the axis of the track body 2 It is a posture inclined to an angle (45 degrees). The two inclined walls 52a and 52b of the inner engagement piece 51a are in a vertical posture with respect to the ceiling wall 35a.
The attachment position of the inner engagement piece 51a in the width direction is the high ceiling portion 38b and a position near the low ceiling portions 40b and 41b. That is, the two inclined walls 52a and 52b of the inner engagement piece 51a are at positions corresponding to the above-described parallelogram space 45, and are erected from the upper side to the lower side with respect to the axis of the track body 2. Tilt to 45 degrees.

Next, focusing attention on the rear end cover piece 32, an inner engagement piece 51b is provided inside the rear end cover piece 32 as shown in FIG. That is, as shown in FIG. 8, an inner engagement piece 51b is provided at the front end of the rear end cover piece 32 and inside the ceiling wall 35c. The direction of the inner engagement piece 51b is a direction in which the two inclined walls 52a and 52b open toward the rear end side and converge on the front side, and each inclined wall 52a and 52b is identical to the axis of the track body 2 It is a posture inclined to an angle (45 degrees). Each inclined wall 52a, b is in a vertical posture with respect to the ceiling wall 35c.
The attachment position of the inner engagement piece 51b in the width direction is the high ceiling portion 38c and a position near the low ceiling portions 40c and 41c. That is, the inclined walls 52a and 52b are erected from the upper side to the lower side at a position corresponding to the above-mentioned parallelogram space 46, and are inclined at 45 degrees with respect to the axis of the track body 2.

  Further, as described above, the left and right side walls 36a, b, c, 37a, b, c of the cover pieces 30, 31, 32 have the overhanging portion 43 projecting outward and the recessed groove portion 68 concaved inward. However, the magnitude relation between the width of the overhanging portion 43 and the width of the recessed groove portion 68 differs depending on the cover pieces 30, 31, 32. Specifically, the widths of the recessed groove portions 68a, b, c provided on the side walls 36a, b, c, 37a, b, c of the cover pieces 30, 31, 32 are as large as the front cover pieces 30, 31, 32 .

That is, as shown in FIG. 17, the width of the recessed groove 68 a provided in the front end cover piece 30 is wider than the width of the recessed groove 68 b provided in the center cover piece 31. Further, the width of the recessed groove portion 68 b provided in the center cover piece 31 is wider than the width of the recessed groove portion 68 c provided in the rear end cover piece 32.
Therefore, when the positional relationship between the cover pieces 30, 31 and 32 is in the closed state, it is the overlapping portion of the side walls 36a, b and c of the cover pieces 30, 31 and 32, and the inclined walls 48a and b of the recessed groove 68c. Spaces 53 and 55 in which the inner and outer surfaces are enclosed are formed in the portions of c and c.

And, outside and inside the side walls 36a, b, c of the cover pieces 30, 31, 32 at the positions corresponding to the spaces 53, 55, as shown in FIGS. A piece 56 and an inner engagement piece 57 are provided.
The outer engagement piece 56 is a knife-like flat long narrow projection as shown in FIG. As shown in FIGS. 7 and 10, the outer engagement piece 56 is attached horizontally with the free end side facing forward and the width direction slightly inclined in the vertical direction.
The inner engagement piece 57 is a through hole. The inner engagement piece 57 is, for example, one obtained by welding the end of a short cut channel steel to the inner wall of the cover piece 31, 32.

The cover pieces 30, 31, 32 will be individually described below.
Focusing on the front end cover piece 30, as shown in FIG. 7, an outer engagement piece 56a is provided on the inclined wall 48a of the side wall 36a on the rear end side of the front end cover piece 30.
The knife-like portion of the outer engagement piece 56 is installed with a slight gap from the inner surface of the inclined wall 48a, and the tip is directed forward as shown in FIGS.

Focusing on the central cover piece 31, as shown in FIGS. 8 and 10, a hole-like inner engagement piece 57a is provided on the front end side of the central cover piece 31 and inside the side wall 36b.
A knife-like outer engagement piece 56b is provided on the inclined wall 48b of the side wall 36b on the rear end side of the central cover piece 31.
The knife-like portion of the outer engagement piece 56b is installed with a slight gap from the inner surface of the inclined wall 48b, and the tip is directed forward as shown in FIGS.

  Next, focusing attention on the rear end cover piece 32, as shown in FIG. 10, a hole-like inner engagement piece 57b is provided at the front end of the rear end cover piece 32 and inside the side wall 36c.

  The outer engagement piece 56 and the inner engagement piece 57 provided on the side walls 36, 37 of the cover pieces 30, 31, 32 constitute a pair of engagement members.

Next, other different points of the cover pieces 30, 31, 32 will be described.
Focusing on the central cover piece 31, a handle member 60 is provided as in FIGS. The handle member 60 is a member having a vertical bar portion 61 and an intermediate support bar (support portion) 62 and protruding outward from the side surface of the center cover piece 31 as shown in FIGS.

The vertical bar portion 61 is formed by bending a round bar or a tube and has an arc shape. The both ends are welded to the front end of the center cover piece 31 as shown in FIG. The middle portion of the vertical bar portion 61 is a handle portion 63 extending in the longitudinal direction at an interval from the side surface of the central cover piece 31.
Further, the intermediate support rod (support portion) 62 is at a position connecting the center of the handle portion 63 and the central cover piece 31. One end of the intermediate support rod 62 is welded to the central cover piece 31 and protrudes in a vertical posture with respect to the central cover piece 31. Further, the other end of the intermediate support rod 62 is connected to the vertical rod portion 61.

The handle member 60 is located at the front end portion of the central cover piece 31, and the handle portion 63 is a rod disposed in a vertical posture, and there is a space between the handle member 60 and the central cover piece 31. The intermediate support bar (support portion) 62 of the handle member 60 is in a horizontal posture and protrudes toward the outside of the central cover piece 31.
The amount by which the handle member 60 projects from the side of the central cover piece 31 is the half width of the rear end cover piece 32 (the length from the center line in the width direction of the cover piece to one widthwise end thereof half the full width of the cover piece) And the half width difference of the central cover piece 31. That is, the amount of protrusion from the side surface of the central cover piece 31 of the handle member 60 is larger than the distance from the end face of the central cover piece 31 to the end face of the rear end cover piece 32 in one of the vehicle left side and right side. Accordingly, the handle member 60 does not enter the gap between the rear end cover piece 32 and the central cover piece 31.

Focusing on the rear end cover piece 32, the rear end cover piece 32 has a shape in which the rear end portion is inclined, and the rear lid member 65 is provided at the portion as shown in FIG.
The rear lid member 65 is a rectangular plate as shown in FIG. 7, and the upper side is connected to the upper side of the opening of the rear end cover piece 32 through a hinge 66.
Therefore, the rear cover member 65 swings around the upper side, and can be opened as shown in FIGS. 5, 6 and 9 so that the rear end of the rear end cover piece 32 can be opened. When the rear lid member 65 is closed as shown in FIGS. 1 and 2, the rear end of the rear end cover piece 32 is closed.
A shock absorbing cylinder 67 is attached between the rear lid member 65 and the rear end cover piece 32.

Further, the lock member 70, the lowering member 71 and the handle member 72 are attached to the side surface of the rear end cover piece 32.
The lock member 70 has a shape as shown in FIGS. 19 and 20, and the lock member engaging piece 75 and the release member 93 are provided on the fixing member 73.
The fixing member 73 has a “U” -shaped fixing groove 81 whose one end is open as shown in FIGS.

  The lock portion engaging piece 75 is a member having a receiving groove 76 opened at one end, as shown in FIG. 19, and is swingably attached to the fixing member 73 through a pin 77. Further, there is a spring (not shown) inside, and the lock portion engaging piece 75 is maintained in a posture in which the receiving groove 76 opens toward the front side.

  The release member 93 is at a position facing the lock portion engagement piece 75, and is pivotably attached to the fixing member 73 via a pin 78. The release member 93 has a swing preventing portion 80. The release member 93 is maintained in a posture in which the swing prevention portion 80 protrudes upward by a spring (not shown).

The lock member 70 is attached to the side surface of the rear end cover piece 32 and in the vicinity of the front end in the front-rear direction. The lock member 70 is normally in a posture in which the receiving groove 76 of the lock portion engaging piece 75 opens toward the front side as shown in FIG.
Then, when the receiving groove 76 of the lock member 70 is pushed rearward, the lock portion engaging piece 75 swings around the pin 77 against a spring (not shown). At that time, a part of the lock portion engagement piece 75 pushes down the rocking prevention portion 80 of the release member 93 and gets over. Then, a part of the lock portion engaging piece 75 engages with the swing preventing portion 80 which is again protruded by the spring force, and the receiving groove 76 of the lock portion engaging piece 75 is directed downward as shown in FIG. Stop. As a result, a space annularly surrounded by the fixing groove 81 and the receiving groove 76 is formed.
In this state, when the operation portion 94 of the release member 93 is pushed down, the engagement relationship between the lock engagement piece 75 and the rocking prevention portion 80 is released, and the reception groove 76 of the lock engagement piece 75 is closer to the front side. Return to open position.

Next, the lowering member 71 will be described.
The lowering member 71 includes a dropping rod 82, a guide cylinder 83, a spring 85 and an upper lid 86.
The dropping rod 82 is a linearly moving pin, and its tip is rounded. An operating portion 87 is provided in the middle of the drop rod 82. The operation portion 87 has a cross bar portion 88 vertically projecting from the side surface of the main body portion of the drop bar 82, and a large diameter portion 90 is provided at the tip thereof.

The guide cylinder 83 is a cylinder whose upper end is closed by the upper lid 86 and whose lower end is open, and a slit 91 is provided on the side surface. The slit 91 has a linear portion 92 extending in parallel with the axis of the guide cylinder 83, and a locking portion 95 provided at both ends of the linear portion and extending in the circumferential direction.
In the lowering member 71, the dropping rod 82 is inserted into the guide cylinder 83 so as to be linearly movable, and the opening at the upper end of the guide cylinder 83 is closed by the upper lid 86, and between the dropping rod 82 and the upper lid 86. A spring 85 is disposed.
Further, the horizontal bar portion 88 of the drop bar 82 is in the portion of the slit 91 of the guide cylinder 83, and the large diameter portion 90 is outside the guide cylinder 83 through the slit 91.

The lowering member 71 holds the large diameter portion 90 of the operation portion 87 by hand and moves the large diameter portion 90 along the slit 91 toward the tip end to linearly move the dropping rod 82 from the guide cylinder 83 The tip of the drop rod 82 can be made to project.
Conversely, the drop rod 82 can also be pulled into the guide cylinder 83.
Furthermore, by turning the drop rod 82 and engaging the cross bar portion 88 with the locking portion 95, the drop rod 82 can be maintained in the retracted position. In the present embodiment, the spring 85 is disposed between the dropping rod 82 and the upper lid 86, and the dropping rod 82 is pressed in the protruding direction by the spring 85. Therefore, the dropping rod 82 is stabilized in the protruding posture.

  The handle member 72 is a member that is entirely recessed and provided with a longitudinally extending crosspiece 74 at the center. The handle member 72 is attached to the side surface of the rear end cover piece 32.

Next, the positional relationship and function of each member of the refuse collection vehicle 1 of the present embodiment will be described. As described above, the dust collection vehicle 1 of the present embodiment includes the loading unit 8 and the cover member 10 in the loading area 6, and the dust collection box 3 is configured by both to cover the box-like space 7.
As described above, the cover member 10 is composed of the front end cover piece 30, the center cover piece 31 and the rear end cover piece 32.
Among the three cover members 10, the front end cover piece 30 is attached to the foremost side (driver's seat 5 side) of the loading unit 8. As shown in FIG. The front end cover piece 30 is integrally fixed to the loading section 8 by known fastening means such as welding or bolts and can not be moved.

The central cover piece 31 and the rear end cover piece 32 are attached to the loading section 8 in a state where the respective rollers 34 are engaged with the guide grooves 22 and 23. Therefore, the center cover piece 31 and the rear end cover piece 32 can be manually moved linearly in the front-rear direction of the track body 2.
However, the guide grooves 22 and 23 of the loading platform 8 are provided with stoppers (not shown), and the rear end cover piece 32 can not move rearward than the position of the rearmost end of the loading platform 8 shown in FIG. . Further, the central cover piece 31 can not move rearward beyond the position covering the central portion of the loading section 8 shown in FIG.

The usual form of the refuse collection vehicle 1 of the present embodiment is the closed state shown in FIG.
In the closed state, the cover pieces 30, 31, 32 are arranged in the order of the front end cover piece 30, the center cover piece 31, and the rear end cover piece 32 from the front, and the side surface of the box-like space 7 is covered without any gap.
Here, in the present embodiment, the cross-sectional area of the cover pieces 30, 31, 32 increases toward the rear, and the end portions of the cover pieces 30, 31, 32 overlap with each other in the closed state.

Specifically, in the closed state, as shown in FIGS. 10, 11, 13 and 14, the rear end of the front end cover piece 30 and the front end of the center cover piece 31 overlap, and the outside of the rear end of the front end cover piece 30 is centered The front end of the cover piece 31 covers.
Further, the rear end of the center cover piece 31 and the front end of the rear end cover piece 32 overlap, and the rear end cover piece 32 covers the outside of the rear end of the center cover piece 31.

Here, focusing on the ceiling side of each overlapping portion, as described above, there is the outer engagement piece 50a outside the rear end of the front end cover piece 30, and the inner engagement piece inside the front end of the center cover piece 31 overlapping this. There is 51a.
In the present embodiment, in the closed state, the outer engagement piece 50a of the front end cover piece 30 and the inner engagement piece 51a of the center cover piece 31 are engaged.
That is, the outer engagement piece 50a of the front end cover piece 30 and the inner engagement piece 51a of the center cover piece 31 have two inclined walls 52a and 52b which open at 90 degrees. The inclined walls 52a and 52b are both open in the same direction.
Therefore, when the outer engagement piece 50a and the inner engagement piece 51a are overlapped, one outer surface is in contact with the other inner surface, and both are loosely engaged.

It should be noted that the front-rear cover piece 30 has an outer engagement piece 50a and the center cover piece 31 has an inner engagement piece 51a.
In the present embodiment, the inner engagement piece 51a provided on the central cover piece 31 located rearward is forward of the outer engagement piece 50a provided on the front end cover piece 30 located forward. And on the front surface (convex side) of the outer engagement piece 50a (inclined walls 52a, 52b) provided on the front end cover piece 30, the inner engagement piece 51a (inclined walls 52a, 52b) provided on the central cover piece 31 The rear surface (concave side surface) is in contact.
A surface where the outer engagement piece 50a and the inner engagement piece 51a are in contact with each other is a contact surface which bears a component of movement of the cover pieces 30, 31, 32 in the lateral direction.

The same applies to the relationship between the ceiling side of the central cover piece 31 and the rear end cover piece 32, and the outer engagement piece 50b of the central cover piece 31 and the inner engagement piece 51b of the rear cover piece 32 are engaged. The inner engagement piece 51b provided on the rear end cover piece 32 located on the rear side is forward of the outer engagement piece 50b provided on the center cover piece 31 located on the front side. The inner engagement piece 51b (inclined walls 52a, 52b) provided on the rear end cover piece 32 on the front surface (convex side) of the outer engagement piece 50b (inclined walls 52a, 52b) provided on the central cover piece 31. The rear face (concave side face) of the is in contact.
A surface where the outer engagement piece 50b and the inner engagement piece 51b are in contact with each other is a contact surface which bears a lateral movement component of the cover pieces 30, 31, 32 with respect to the vehicle body.
The pair of inclined walls 52a, 52b is inclined with respect to the longitudinal axis of the vehicle in plan view. That is, the contact surface, which is the surface on which the pair of inclined walls is in contact, is inclined in plan view.

Further, focusing on the side wall side of each overlapping portion in the closed state, when the positional relationship between the cover pieces 30, 31, 32 is in the closed state as described above, the side walls 36a, b, b of the cover pieces 30, 31, 32 are Spaces 53, 55 are formed at the overlapping portions of the portions c, 37a, b, c and in the portions of the inclined walls 48a, b, c of the recessed groove portion 68c.
As described above, in the closed state, the rear end of the front end cover piece 30 and the front end of the center cover piece 31 overlap, but the inclined wall 48a of that part of the front end cover piece 30 has the knife-like outer engagement piece 56a. It is provided.
Further, inside the inclined wall 48b of the central cover piece 31, an inner engagement piece 57a in the form of a through hole is provided.
In the closed state, the knife-like outer engagement piece 56a of the front end cover piece 30 enters the through hole of the inner engagement piece 57a of the central cover piece 31, and the outer engagement piece 56a and the inner engagement piece 57a. Is engaged.

  In the closed state, when the dust in the container hits and the cover pieces 30, 31 are shaken, the inner surface of the through hole of the inner engaging piece 57a and the outer peripheral surface of the part entering the through hole of the outer engaging piece 56a Contact. The surface where the outer engagement piece 56a and the inner engagement piece 57a contact each other is a contact surface that bears a moving component in the lateral direction with respect to the vehicle body of the cover pieces 30, 31.

The same applies to the overlapping portion of the rear end of the central cover piece 31 and the front end of the rear end cover piece 32. The inclined wall 48b of the central cover piece 31 is provided with a knife-like outer engagement piece 56b. The outer engagement piece 56b is inserted into the through hole of the inner engagement piece 57b provided on the rear end cover piece 32, and the outer engagement piece 56b and the inner engagement piece 57b are in an engaged state.
In the closed state, when the dust in the container hits and the cover pieces 31, 32 are shaken, the inner surface of the through hole of the inner engaging piece 57b and the outer peripheral surface of the part entering the through hole of the outer engaging piece 56b Contact. The surface where the outer engagement piece 56b and the inner engagement piece 57b contact each other is a contact surface that bears a moving component in the lateral direction with respect to the vehicle body of the cover pieces 31, 32.

In the dust collection vehicle 1 of the present embodiment, the positional relationship between the cover pieces 30, 31, 32 in the closed state in the front-rear direction is a stopper not shown, a lowering member 71 provided on the rear end cover piece 32, and each cover It is fixed by the engagement of the outer engagement pieces 50a, 50b and the inner engagement pieces 51a, 51b and the engagement of the outer engagement pieces 56a, 56b of the cover pieces and the inner engagement pieces 57a, 57b.
In the dust collection vehicle 1 of the present embodiment, the cover pieces 30, 31, 32 have the outer engagement pieces 50a, 50b, the inner engagement pieces 51a, 51b, and the outer engagement pieces 56a, 56b, the inner engagement piece 57a, b is provided, and the adjacent cover pieces 30, 31, 32 will not be completely detached.
In the closed state, since the cover pieces 30 and 32 at both ends are fixed, the position of the central cover piece 31 is inevitably determined.

It will be described below.
As described above, in the present embodiment, the lowering member 71 is provided on the rear end cover piece 32 and the lowering member 71 fixes the rear end cover piece 32 at the position of the rear end of the loading portion 8.
When the rear end cover piece 32 is at the rear end, the position of the lowering member 71 coincides with the position of the hole member 26 provided in the loading section 8.
Therefore, the drop rod 82 of the drop member 71 can be moved linearly to protrude the tip, and the drop rod 82 can be engaged with the hole member 26.
As a result, the position of the rear end cover piece 32 is fixed.
In the present embodiment, the operation of fixing the rear end cover piece 32 only needs to operate the drop rod 82, and there is no need to operate the hole member 26. Therefore, the rear end cover piece 32 can be fixed by a simple operation.

As described above, the front end cover piece 30 is integrally fixed to the loading section 8 by means of welding or the like and can not be moved. Further, the position of the rear end cover piece 32 in the front-rear direction is fixed by the function of the lowering member 71.
The position of the central cover piece 31 sandwiched between the two is determined by the stopper, not shown, the engagement of the outer engagement pieces 50a and 50b and the inner engagement pieces 51a and 51b of each cover piece and the respective cover pieces. It fixes by engagement of outer side engagement piece 56a, b and inner side engagement piece 57a, b.

  As described above, the guide grooves 22 and 23 of the loading section 8 are provided with stoppers (not shown), and the central cover piece 31 moves rearward than covering the center of the loading section 8 shown in FIG. I can not do it.

  Further, as shown in FIGS. 10 (c), 11 and 12 (a), the outer engagement piece 50b provided on the ceiling wall 35b of the center cover piece 31 and the inner side provided on the ceiling wall 35c of the rear end cover piece 32. The engagement piece 51b is engaged. Here, as described above, the inner engagement piece 51b provided on the ceiling wall 35c of the rear end cover piece 32 positioned on the rear is the outer engagement provided on the ceiling wall 35b of the center cover piece 31 positioned on the front It is ahead of the piece 50b. The rear surface of the inner engagement piece 51 b provided on the rear end cover piece 32 is in contact with the front surface of the outer engagement piece 50 b provided on the central cover piece 31. Therefore, the center cover piece 31 can not move forward due to the engagement of the outer engagement piece 50b and the inner engagement piece 51b.

Similarly, the central cover piece is also obtained by the engagement relationship between the outer engagement piece 56b provided on the side walls 36b and 37b of the central cover piece 31 and the inner engagement piece 57b provided on the side walls 36c and 37c of the rear end cover piece 32. 31 can not move forward.
That is, the inner engagement piece 57b provided on the side walls 36c and 37c of the rear end cover piece 32 located rearward is greater than the outer engagement piece 56b provided on the side walls 36b and 37b of the center cover piece 31 located forward. It is ahead. Therefore, the center cover piece 31 can not be removed from the rear end cover piece 32 even by the engagement of the outer engagement piece 56b and the inner engagement piece 57b.

On the other hand, in the rear end cover piece 32, the dropping rod 82 of the lowering member 71 is engaged with the hole member 26, and can not move to the front side.
Therefore, the central cover piece 31 can not be moved forward because it is blocked by the inner engagement piece 51b provided on the rear end cover piece 32. As a result, in the closed state, the central cover piece 31 is more forward than the central position. I can not move.

  Further, as shown in FIG. 10C and FIG. 11, the outer engagement piece 50a provided on the ceiling wall 35a of the front end center cover piece 30 and the inner engagement piece 51a provided on the ceiling wall 35b of the center cover piece 31 are engaged. It is correct. Here, the inner engagement piece 51a provided on the ceiling wall 35b of the central cover piece 31 located rearward is more forward than the outer engagement piece 50a provided on the ceiling wall 35a of the front end cover piece 30 located forward. is there. The front surface of the outer engagement piece 50 a provided on the front end cover piece 30 is in contact with the rear surface of the inner engagement piece 51 a provided on the central cover piece 31. Therefore, the center cover piece 31 can not move backward due to the engagement of the outer engagement piece 50a and the inner engagement piece 51a.

Similarly, the central cover piece 31 is also obtained by the engagement between the inner engagement piece 57a provided on the side walls 36b and 37b of the central cover piece 31 and the outer engagement piece 57a provided on the side walls 36a and 37a of the front end cover piece 30. Can not move backwards.
That is, the inner engagement piece 57a provided on the side walls 36b and 37b of the central cover piece 31 located rearward is forward of the outer engagement piece 56a provided on the side walls 36a and 37a of the front end cover piece 30 located forward. is there. Therefore, the center cover piece 31 can not be removed from the front end cover piece 30 even by the engagement of the outer engagement pieces 56a and 56b and the inner engagement pieces 57a and 57b.

As described above, the front end cover piece 30 is attached to the front end of the loading portion 8 by welding or the like and can not move. Therefore, the central cover piece 31 can not be moved backward because it is blocked by the outer engagement piece 50a provided on the front end cover piece 30, and in the closed state, it consequently moves rearward than the central position. I can not do it.
Therefore, the central cover piece 31 sandwiched between the front end cover piece 30 and the rear end cover piece 32 can not move forward or backward, and stays at the center position.

Further, in the present embodiment, the lateral swing or distortion of the cover pieces 30, 31, 32 is caused by the engagement between the outer engagement piece 50 and the inner engagement piece 51 provided on the ceiling walls 35a, b, c. Suppressed by Further, in the present embodiment, the lateral swing and distortion of the cover pieces 30, 31, 32 are caused by the outer engagement pieces 56a, 56b provided on the side walls 36a, b, c, 37a, b, c. It is suppressed by the engagement of the coupling pieces 57a and 57b.
That is, the outer engagement piece 50 provided on the ceiling walls 35a, b, c and the inner engagement piece 51 are in contact with the inclined surface, and the inclined surface bears the moving components of the cover pieces 31 and 32 in the lateral direction. can do.
Further, since the outer engagement piece 56 provided on the side wall and the inner engagement piece 57 are such that the knife-like outer engagement piece 56 enters the through hole of the inner engagement piece 57, The side surface and the inner surface of the through hole can bear the lateral movement component of each cover piece 31, 32.
Therefore, according to the engagement between the outer engagement piece 50 and the inner engagement piece 51 and the engagement between the outer engagement piece 56 and the inner engagement piece 57 provided on the side wall, the cover pieces 30, 31, 32 Lateral shaking and distortion are suppressed.

The lateral movement component refers to a force that causes the side wall of the cover piece to deform outward when dust in the medium hits the cover piece. In the present embodiment, the ceiling wall or the side wall is provided with a pair of engagement pieces. Thereby, when a force is applied to the side wall of the central cover piece or the rear end cover piece, the central cover piece is deformed outward by coming into engagement with the inner front end cover piece, thereby being detached from the rail. To prevent. The rear end cover piece is engaged with the inner central cover piece to prevent it from being deformed outward and coming off from the rail.
The engagement member of the top wall is prevented from being detached from the rail by the upper part of the cover piece side wall being deformed outward and the lower part being deformed following the deformation of the upper part. The engagement member of the side wall prevents the side wall from being deformed outward from the center to the lower end and detached from the rail.

The refuse collection vehicle 1 of the present embodiment can be changed from the above-described normal form (closed state) to an open state in which the side surface of the box-like space is partially opened.
The form of the refuse collection vehicle 1 in the open state is as shown in FIG. 6, FIG. 9 (b) and FIG. 10 (a), and both the center cover piece 31 and the rear end cover piece 32 move to the front end side, In the closed state, the area where the central cover piece 31 and the rear end cover piece 32 were present is open.
In the open state, the front end cover piece 30 is provided at the front end of the loading portion 8, the center cover piece 31 is covered on the outer side, and the rear end cover piece 32 covers the outer side.

In the present embodiment, the cover pieces 30, 31, 32 can be fixed at the open position.
That is, as described above, the front end cover piece 30 is integrally fixed to the foremost side (driver's seat 5 side) of the loading section 8 by welding, bolts or the like, and can not be moved from the front end of the loading section 8 in the first place.
The rear end cover piece 32 is fixed to the front end by inserting the dropping rod 82 of the lowering member 71 into the hole member 25 provided on the side surface of the loading portion 8.

The central cover piece 31 is prevented from moving rearward by the abutment of the handle member 60 with the rear end cover piece 32 and remains at the position of the front end of the loading section 8.
That is, as described above, the handle member 60 is at the front end portion of the central cover piece 31 and protrudes outward. The handle member 60 projects further outward than the rear end cover piece 32 and does not enter the gap between the rear end cover piece 32 and the central cover piece 31.
Therefore, the handle member 60 of the central cover piece 31 collides with the front end of the rear end cover piece 32 to prevent the central cover piece 31 from moving backward, and the central cover piece 31 is positioned at the front end of the loading portion 8 stay.

In the open state, as shown in FIG. 20, the lock member 70 provided on the rear end cover piece 32 is engaged with the intermediate support rod 62 of the handle member 60 of the central cover piece 31. The central cover piece 31 and the rear end cover piece 32 are connected with the rear end cover piece 32 covering most of the outside. Therefore, the central cover piece 31 maintains the relative positional relationship with the rear end cover piece 32 in a state where the rear cover piece 32 covers most of the outside of the central cover piece 31. Therefore, it is possible to prevent the central cover piece 31 from moving relative to the rear end cover piece 32 and hitting an operator's finger or the like due to the swing of the vehicle or the like. Therefore, this configuration further enhances the safety.
As described above, since the rear end cover piece 32 is fixed to the front end by inserting the drop bar 82 of the lowering member 71 into the hole member 25 provided on the side surface of the bed portion 8, the central cover piece 31 Is also fixed to the front end of the loading section 8.

Next, a procedure for shifting from the open state as shown in FIG. 6 to the closed state as shown in FIG. 1 will be described.
When transitioning from the open state to the closed state, first, the rear end cover piece 32 is set to be able to move rearward from the front end side. That is, in the open state, the dropping rod 82 of the lowering member 71 is inserted into the hole member 25 provided on the side surface of the loading platform 8 and the rear end cover piece 32 is fixed on the front side. In order to move 32 backward, the engagement relationship between the lowering member 71 and the hole member 25 is released. Specifically, the drop rod 82 is pulled up and pulled out of the hole member 25. Subsequently, the drop rod 82 is turned to engage the cross bar portion 88 with the locking portion 95, and the drop rod 82 is fixed in a state in which the drop rod 82 is pulled up.

Subsequently, the operator grasps the handle member 72 of the rear end cover piece 32 by hand and moves the rear end cover piece 32 to the rear by manual operation as shown in FIG. 10 (a) to FIG. 10 (b).
Here, as described above, the lock member 70 provided on the rear end cover piece 32 is engaged with the intermediate support rod 62 of the handle member 60 of the central cover piece 31, and most of the outer side of the central cover piece 31 The central cover piece 31 and the rear end cover piece 32 are connected with the rear end cover piece 32 covered. Therefore, when the rear end cover piece 32 is moved rearward, the central cover piece 31 connected to the rear end cover piece 32 also moves rearward. In other words, the rear end cover piece 32 covering the outer side does not move ahead of the central cover piece 31 accommodated inside. In short, the central cover piece 31 moves rearward while maintaining the relative distance with the rear end cover piece 32. As a result, the rear end cover piece 32 is prevented from covering the end of the central cover piece 31 in the direction of travel (rear). Therefore, when moving the central cover piece 31, even if dust is caught on the end of the central cover piece 31 in the direction of movement, the rear end cover piece 32 does not disturb to remove the dust, and the dust is removed Is easy.

Here, focusing attention on the ceiling wall 35b of the central cover piece 31, as shown in FIG. 10A, the inner engagement piece 51a is provided at the front end of the central cover piece 31 and inside the ceiling wall 35b.
When in the open state, the position of the inner engagement piece 51a of the central cover piece 31 in the front-rear direction is the front end side of the front end cover piece 30, and the inner engagement piece 51a of the central cover piece 31 is engaged with anything Absent.
The same applies to the side walls 36b and 37b of the central cover piece 31. As shown in FIG. 10A, the inner engagement piece 57a is provided at the front end of the central cover piece 31 and inside the side walls 36b and 37b.
When in the open state, the position of the inner engagement piece 57a of the central cover piece 31 in the front-rear direction is the front end side of the front end cover piece 30, and the inner engagement piece 57a of the central cover piece 31 is engaged with anything Absent.
Therefore, when the central cover piece 31 is pushed backward, the central cover piece 31 moves rearward without any obstacle.
Then, with the movement of the rear end cover piece 32, the central cover piece 31 moves rearward, and in accordance with this, the inner engagement piece 57a of the central cover piece 31 also moves rearward.

Next, focusing attention on the ceiling wall 35a of the front end cover piece 30, as shown in FIG. 10A, the outer engagement piece 50a is provided at the rear end of the front end cover piece 30 and outside the ceiling wall 35a.
When the inner engagement piece 51a of the center cover piece 31 also moves backward with the movement of the rear end cover piece 32, the inner engagement piece 51a approaches the outer engagement piece 50a of the front end cover piece 30 from the front side, Finally, the inner engagement piece 51a of the central cover piece 31 abuts and engages the outer engagement piece 50a of the front end cover piece 30.

The same applies to the relationship between the outer engagement piece 56 a provided on the side walls 36 a and 37 a of the front end cover piece 30 and the inner engagement piece 57 a provided on the side walls 36 b and 37 b of the center cover piece 31. When the inner engagement piece 57a provided on the side walls 36a and 37a of the central cover piece 31 is also moved backward with the movement of the inner cover piece 31, the inner engagement piece 57a is provided on the side walls 36b and 37b of the front end cover piece 30 from the front side. The outer engagement piece 56 a of the front end cover piece 30 is finally inserted into the inner engagement piece 57 a of the central cover piece 31, approaching the outer engagement piece 56 a.
As a result, the central cover piece 31 can not move further rearward. Further, since the center cover piece 31 also abuts on a stopper (not shown), the center cover piece 31 can not move further backward from this point as well.
As a result, the central cover piece 31 can not move further rearward.

Therefore, when the operator pushes the rear end cover piece 32 rearward, the rear end cover piece 32 stops at the center in the front-rear direction.
Subsequently, the worker releases the engagement between the handle member 60 and the lock member 70. Specifically, the operating portion 94 of the release member 93 of the lock member 70 is pushed down to cancel the engagement between the lock engagement piece 75 and the rocking prevention portion 80, and the lock engagement piece 75 is received by the receiving groove 76. Returns to the position where it opens toward the front side.
By this operation, the connection between the rear end cover piece 32 and the center cover piece 31 is released.

  After that, the operator again grasps the handle member 72 of the rear end cover piece 32 by hand, and moves the rear end cover piece 32 further rearward as shown in FIG. 10 (b) to FIG. 10 (c).

Here, focusing attention on the ceiling wall 35c of the rear end cover piece 32, as shown in FIG. 10B, the inner engagement piece 51b is provided at the front end of the rear end cover piece 32 and inside the ceiling wall 35c.
When in the middle open state, the position of the inner engagement piece 51b of the rear end cover piece 32 in the front-rear direction is the front end side of the rear end cover piece 32, and the inner engagement piece 51b of the rear end cover piece 32 Not engaged.
The same applies to the side walls 36c and 37c of the rear end cover piece 32. When in the middle open state, the position of the inner engagement piece 57b of the rear end cover piece 32 in the front-rear direction is the front end side of the rear end cover 32 And the inner engagement piece 57b of the rear end cover piece 32 is not engaged at all.
Therefore, when the rear end cover piece 32 is pushed backward, the rear end cover piece 32 moves rearward without any obstacle. Then, along with the movement of the rear end cover piece 32, the inner engagement piece 57b also moves rearward.

Next, focusing attention on the ceiling wall 35b of the central cover piece 31, as shown in FIG. 10B, the outer engagement piece 50b is provided at the rear end of the central cover piece 31 and outside the ceiling wall 35b.
When the inner engagement piece 51b of the rear end cover piece 32 is also moved backward with the movement of the rear end cover piece 32, the inner engagement piece 51b approaches the outer engagement piece 50b of the center cover piece 31 from the front side. Finally, the inner engagement piece 51b of the rear end cover piece 32 abuts on and engages with the outer engagement piece 50b of the central cover piece 31.

The same applies to the relationship between the outer engagement piece 56b provided on the side walls 36b and 37b of the central cover piece 31 and the outer engagement piece 57b provided on the side walls 36c and 37c of the rear end cover piece 32. When the inner engagement piece 57b provided on the side walls 36c and 37c of the rear end cover piece 32 is also moved backward with the movement of the piece 32, the inner engagement piece 57b is moved from the front side to the side walls 36b and 37b of the central cover piece 30. Finally, the outer engagement piece 56 b of the central cover piece 31 is inserted into the inner engagement piece 57 b of the outer cover piece 32.
As a result, the rear end cover piece 32 can not move further rearward. Further, since the rear end cover piece 32 also abuts on a stopper (not shown), the rear end cover piece 32 can not move further rearward from this point as well.
At the stage when the rear end cover piece 32 reaches the rear end of the loading section 8, the drop rod 82 of the drop member 71 is linearly moved to project the tip end, and the drop rod 82 is engaged with the hole member 26 The cover piece 32 is fixed to the rear end of the loading section 8.

As described above, when transitioning from the open state to the closed state, the central cover piece 31 covers the outer side of the front end cover piece 30 and the rear end cover piece 32 covers the outer side thereof. 31 and the rear end cover piece 32 are moved backward together, and then only the rear end cover piece 32 is moved backward.
At that time, as described above, the inner engagement pieces 51a and 51b provided on the ceiling walls 35a, b and c of the cover pieces 30, 31 and 32 approach the outer engagement pieces 50a and 50b from the front. Engage.
That is, the outer engagement pieces 50a, 50b are in the fixed position, and the inner engagement pieces 51a, 51b approach the outer engagement pieces 50a, 50b from the front.

Here, in the present embodiment, the outer engagement piece 56 and the inner engagement piece 57 are also provided on the left and right side walls 36a, b, c, 37a, b, c of the cover pieces 30, 31, 32.
The engagement process of the outer engagement piece 56 and the inner engagement piece 57 provided on the left and right side walls 36a, b, c, 37a, b, c of the cover pieces 30, 31, 32 is the ceiling walls 35a, b, c It is similar to the engagement process between the inner engagement pieces 51a, 51b and the outer engagement pieces 50a, 50b.

That is, the outer engagement pieces 56a and 56b are knife-like long and thin projections, and are horizontally mounted with the free end side forward as shown in FIGS.
The outer engagement pieces 56a and 56b are attached to the front end cover piece 30 and the center cover piece 31, which are fixed when moving from the open state to the closed state.
On the other hand, the inner engagement piece 57 is a through hole, and is attached to the center cover piece 31 and the rear end cover piece 32 which are on the moving side when shifting from the open state to the closed state.
As described above, when transitioning from the open state to the closed state, the central cover piece 31 covers the outer side of the front end cover piece 30 and the rear end cover piece 32 covers the outer side thereof. 31 and the rear end cover piece 32 are both moved backward.

  At this time, a through hole-like inner engagement piece 57a provided on the center cover piece 31 approaches the knife-like outer engagement piece 56a fixed to the front end cover piece 30 from the front side. That is, the through hole-like inner engaging piece 57a approaches from the tip end side of the knife-like outer engaging piece 56a, and finally the knife-like outer engaging piece 56a is inserted into the through hole-like inner engaging piece 57a. Engage.

  Further, after the intermediate open state, only the rear end cover piece 32 is moved backward. At this time, a through hole-like inner engagement piece 57b provided in the rear end cover piece 32 approaches the knife-like outer engagement piece 56b fixed to the central cover piece 30 from the front side. That is, the through hole-like inner engagement piece 57b approaches from the tip end side of the knife-like outer engagement piece 56b, and finally, the knife-like outer engagement piece 56b is inserted into the through hole-like inner engagement piece 57b. Engage.

  Next, a procedure for shifting from the closed state as shown in FIG. 1 to the open state as shown in FIG. 6 will be described. The procedure for transitioning from the closed state to the open state is the reverse of the above-described procedure, and first, the rear end cover piece 32 is brought into a state where it can move forward from the rear end side. That is, in the closed state, the drop rod 82 of the drop member 71 is engaged with the hole member 26 provided on the side surface of the bed portion 8 so that the rear end cover piece 32 is fixed so as not to move forward. In order to move the rear end cover piece 32 forward, the engagement relationship between the lowering member 71 and the hole member 26 is released. Specifically, the drop rod 82 is pulled up to cancel the contact relationship with the hole member 26, and subsequently, the drop rod 82 is turned to engage the cross bar portion 88 with the locking portion 95, and the drop rod 82 is pulled up. The drop rod 82 is fixed in the closed state.

Subsequently, the operator grasps the handle member 72 of the rear end cover piece 32 by hand, and moves the rear end cover piece 32 forward.
Here, focusing on the ceiling wall 35 c of the rear end cover piece 32 and the ceiling wall 35 b of the central cover piece 31, the inner engagement piece 51 b of the rear end cover piece 32 to be moved is the outer engagement of the adjacent central cover piece 31. It is on the front side of the joint piece 50 b and precedes the advancing direction of the rear end cover piece 32. Therefore, when the rear end cover piece 32 is moved forward, the inner engagement piece 51b of the rear end cover piece 32 moves in a direction away from the outer engagement piece 50b of the central cover piece 31 as shown in FIG. It does not hinder the movement of the piece 32.

  The same applies to the relationship between the inner engagement piece 57b provided on the side wall 36c of the rear end cover piece 32 and the inner engagement piece 56b provided on the side wall 36c of the central cover piece 31. The 32 inner engagement pieces 57 b are on the front side of the outer engagement piece 56 b of the adjacent central cover piece 31 and precede in the advancing direction of the rear end cover piece 32. Therefore, when the rear end cover piece 32 is moved forward, the inner engagement piece 57b of the rear end cover piece 32 moves in the direction of coming out of the outer engagement piece 57b of the central cover piece 31, and the rear end cover piece 32 moves. It does not disturb.

Therefore, when the operator manually grips the handle member 72 of the rear end cover piece 32 and pushes the rear end cover piece 32 forward, only the rear end cover piece 32 moves forward and the central cover piece 31 remains in place . Then, when the rear end cover piece 32 is pressed, most of the rear end cover pieces 32 surround the central cover piece 31 and finally, the rear end cover piece 32 completely covers the central cover piece 31.
Focusing on the relationship between the handle member 60 of the central cover piece 31 and the lock member 70 at this time, it is as shown in FIG. 19 while the rear end cover piece 32 is moving, and the handle member 60 and the lock member 70 is seperated.
Here, the posture of the lock member 70 is as shown in FIG. 19, and the lock portion engaging piece 75 is in a posture in which the receiving groove 76 opens toward the front side.

When the rear end cover piece 32 is further moved forward from this state, the lock portion engagement piece 75 collides with the intermediate support bar (support portion) 62 of the handle member 60. Then, the intermediate support rod 62 enters the receiving groove 76 of the lock engagement piece 75, further pushes the lock engagement piece 75, and swings the lock engagement piece 75 about the pin 77.
As a result, as shown in FIG. 20, a part of the lock engagement piece 75 pushes down the rocking prevention part 80 of the release member 93 and goes over, and a part of the lock engagement piece 75 protrudes again by the spring force. It engages with the rocking prevention portion 80 and stops in a posture in which the receiving groove 76 of the lock portion engaging piece 75 is directed downward.

Therefore, the opening of the fixing groove 81 is closed, and the intermediate support rod 62 of the handle member 60 is confined in the annularly enclosed space by the receiving groove 76.
That is, the lock member 70 provided on the rear end cover piece 32 is engaged with the intermediate support rod 62 of the handle member 60 of the central cover piece 31, and the central cover piece 31 is connected to the rear end cover piece 32.
At this time, the handle member 60 of the central cover piece 31 abuts on the end face of the rear end cover piece 32. Therefore, when the rear end cover piece 32 is further moved forward, the center cover piece 31 moves integrally with the rear end cover piece 32 thereafter.
Finally, the rear end cover piece 32 and the central cover piece 31 reach the front end position. Thereafter, the drop rod 82 of the lowering member 71 of the rear end cover piece 32 is inserted into the hole member 25 provided on the side surface of the cargo bed portion 8, and the rear end cover piece 32 is fixed to the front end.

  The relationship between the outer engagement piece 50a of the ceiling wall 35a of the front end cover piece 30 and the inner engagement piece 51a of the center cover piece 31 when the central cover piece 31 moves forward with the rear end cover piece 32 is described above. The inner engagement piece 51a of the center cover piece 31 moves in a direction away from the outer engagement piece 50a of the front end cover piece 30, which is the same as the relationship between the center cover piece 31 and the rear end cover piece 32. Does not impede the movement of

  The same applies to the relationship between the inner engagement piece 57a provided on the side wall 36b of the central cover piece 31 and the outer engagement piece 56a provided on the side wall 36a of the front end cover piece 30. The inner engagement piece 57 a is on the front side of the outer engagement piece 56 a of the adjacent front end cover piece 30 and does not hinder the movement of the rear end cover piece 32.

In the dust collection vehicle 1 of this embodiment, the cover pieces 30, 31, 32 have large and small cross-sectional shapes, and the cross-sectional area of the cover pieces 30, 31, 32 attached to the rear side is larger. By adopting this configuration, the waste can be discharged smoothly. Hereinafter, this point will be described.
As the dust collection vehicle 1 of the present embodiment has a larger cross-sectional area as the cover pieces 30, 31, 32 attached to the rear side, the dust collection box 3 is schematically shown in FIG. The cross-sectional area gradually increases as
In the dust collection vehicle 1 of the present embodiment, the discharge plate 28 is inside the dust collection box 3 and the waste is moved backward by the pressing cylinder 24 in a state where the rear end of the dust collection box 3 is opened. Discharge.

That is, as shown in FIG. 5, the rear lid member 65 is in a raised position, and the lower opening door 17 and the pair of double doors 15 and 16 are opened to open the rear end of the box-like space 7 to form the discharge opening 150.
Then, as shown in FIG. 14 (b) and FIG. 27, the discharge plate 28 is moved rearward to discharge the internal dust from the rear discharge opening 150.

In the dust collection vehicle 1 of the present embodiment, the movement range of the discharge plate 28 is accommodated in the box-like space 7 as shown in FIG. 27, and the discharge plate 28 does not protrude outside the box-like space 7.
More specifically, during the operation of discharging the waste from the rear discharge opening 150, any part of the discharge plate 28 stays in front of the discharge opening 150 and does not fly out of the discharge opening 150.
In the waste collection vehicle 1 of the present embodiment, the rear end of the movement range of the discharge plate 28 is discharged when the discharge plate 28 is moved rearward to discharge the dust in the box-like space 7 from the rear end of the box-like space 7 It is ahead of the opening 150. According to the present embodiment, the discharge plate 28 is movable forward of the rear end of the rear end cover piece 32 during normal operation, and more than the rear end of the rear end cover piece 32 in the closed state. It does not reach behind. In other words, the discharge plate 28 does not extend behind the rear end of the cover member 10 in the closed state.

  When the discharge of the waste is finished, the discharge plate 28 is returned to the front side, but in the present embodiment, the movement range of the discharge plate 28 is accommodated in the box-like space 7 as shown in FIG. Since the discharge plate 28 does not protrude outside, no worker is caught when the discharge plate 28 is returned to the front side. That is, in the present embodiment, since the discharge plate 28 does not protrude outside the box-like space 7, the front end of the discharge plate 28 is always in the box-like space 7, and the front end of the discharge plate 28 and the rear end cover There is no gap between the rear end of the piece 32 and the rear end of the loading section 8. Therefore, when the discharge plate 28 is returned to the front side, the operator is not pinched between the front end of the discharge plate 28 and the rear end cover piece 32 and the like, which is safe.

Further, in the present embodiment, since the cross-sectional area of the dust collection box 3 gradually increases from the front side to the back side, when the dust is pressed by the discharge plate 28, the dust is not compressed and is not easily clogged.
That is, as shown in FIG. 14, when dust is pushed by the discharge plate 28, the dust in the area F originally covered by the front end cover piece 30 moves backward and is pushed to the area C covered by the central cover piece 31. . Here, the height inside the region C after movement is higher than the height of the original region F. Further, the width inside the region C after movement is wider than the width of the original region F. Therefore, the waste is pushed out from a narrow place to a place with enough space, and the movement is smooth.
The same applies to the case where the dust in the area C originally covered by the central cover piece 31 moves backward and is pushed to the area R covered by the rear end cover piece 32, and the dust is spread from a narrow place to a wide area. It is pushed out to a place where there is room, and the movement is smooth.

  Further, focusing on the overlapping portions of the cover pieces 30, 31 and 32 in the closed state, as shown in FIG. 14, the end portions of the cover pieces 30 and 31 on the base end side in the dust traveling direction It projects in the forward direction, and the end portions of the cover pieces 31 and 32 overlap the outside thereof. Therefore, the level differences generated at the joint of the cover pieces 30, 31, 32 all face the opposite side with respect to the traveling direction of the dust. Therefore, it is difficult for the moving dust to be caught on the step of the joint between the cover pieces 30, 31 and 32. Further, there is little concern that dust may enter the gaps between the cover pieces 30, 31, 32.

Further, since the dust collection vehicle 1 of the present embodiment has a cross-sectional area as large as the cover pieces 30, 31, 32 attached to the rear side, it is easy to change the posture from the closed state to the open state. Hereinafter, this point will be described with reference to FIG.
When changing the posture of the box-like space 7 of the refuse collection vehicle 1 from the closed state to the open state, as shown in FIG. 13A, the rear end cover piece 32 at the rear end is released and pushed forward.
In the present embodiment, at the beginning of movement, as shown in FIG. 13B, only the rear end cover piece 32 moves forward.

Here, in the closed state, as shown in FIG. 13A, the leading end of the rear end cover piece 32 in the advancing direction overlaps the outside of the central cover piece 31 at the rear in the advancing direction.
Therefore, when the rear end cover piece 32 is moved forward, the moving rear end cover piece 32 moves on the outside of the fixed side central cover 31 and there is relatively little chance of contact with dust. Therefore, the rear end cover piece 32 can be easily moved.

  The same applies to the movement of the central cover 31 with the rear end cover piece 32. The movable central cover 31 moves on the outer side of the front end cover piece 30 on the stationary side, and there is relatively little chance of contact with dust. Therefore, the central cover 31 can be easily moved. The rear end cover piece 32 is generally located outside the central cover 31 when moving with the central cover 31 and has less chance of coming into contact with dust.

  In the present embodiment, the innermost front end cover piece 30 is welded and fixed to a loading platform. Since the front end cover piece 30 is the innermost, the other cover pieces move outside the front end cover piece 30. For this reason, when another cover piece overlaps with the front end cover piece 30, there is little chance of coming into contact with dust.

Further, in the refuse collection vehicle 1 of the present embodiment, even when the vehicle is stopped on a slope and the refuse is collected, the cover pieces 30, 31, 32 do not move unintentionally.
Assuming that the dust collection vehicle 1 of this embodiment stops on a slope with the front side (driver's seat 5 side) down and opens the box-like space 7 to collect waste, it is assumed that each cover piece Reference numerals 30, 31 and 32 are originally at a position near the front end of the loading section 8 and stop at a position along the slope of the slope.
Therefore, the cover pieces 30, 31, 32 do not move in the closing direction during the collection operation, and safety is ensured.

On the other hand, it is assumed that the dust collection vehicle 1 of this embodiment stops on a slope where the front side (driver's seat 5 side) is up and the box-like space 7 is opened to collect waste. Each cover piece 30, 31, 32 receives a force that tends to move in the closing direction by gravity.
However, in the present embodiment, the front end cover piece 30 is integrally coupled to the bed portion 8 by welding or the like, and does not move in the closing direction.

On the other hand, the rear end cover piece 32 does not move in the closing direction (rear end side) because the drop rod 82 of the drop member 71 is engaged with the hole member 25 provided in the loading section 8. Further, since the drop rod 82 is biased by the spring 85 in a direction to maintain the engagement with the hole member 25, the drop rod 82 is unlikely to come off due to vibration or the like.
Furthermore, the lowering rod 71 can maintain the posture in which the dropping rod 82 protrudes by urging the dropping rod 82 downward with the spring 85, so the dropping rod 82 is pulled out of the hole member 25 against the intention. The risk of falling is small.
Therefore, even if the vehicle stops on a slope with the front side up, and the box-like space 7 is opened, the rear end cover member 32 does not move in the closing direction against the intention.

  Next, the central cover piece 31 will be examined. The central cover piece 31 is provided with a handle member 60 on the tip side. The handle member 60 is a member projecting outward from the side surface of the central cover piece 31 as described above, and the full width or half width (half of the full width of the cover piece) is limited to the portion provided with the handle member 60. Larger than the rear end cover piece 32. Therefore, in the central cover piece 31, the handle member 60 abuts on the rear end cover piece 32 and can not move to the rear end side over the rear end cover piece 32.

If the overall length of the central cover piece 31 is longer than that of the rear end cover piece 32, the rear end of the central cover piece 31 may protrude from the rear end of the rear end cover piece 32, but the central cover piece 31 alone does not move backward with the rear end cover piece 32 left behind.
As described above, since the rear end cover piece 32 is fixed at a fixed position by the lowering member 71, most of the central cover piece 31 is inside the rear end cover piece 32, and the central cover piece 31 Only does not fall to the rear end side against the intention.
Therefore, the refuse collection vehicle 1 of the present embodiment is safe because the cover pieces 30, 31, 32 do not move in the closing direction against the intention of the worker during the collection operation.

In the dust collection vehicle 1 of the present invention, the discharge device 11 is provided in the box-like space 7, but the discharge device 11 has an electric circuit so that it operates only when the box-like space 7 is closed. It is assembled.
That is, in the dust collection vehicle 1 of the present embodiment, in order to fix the rear end cover piece 32 at the position of the rear end, the lowering member 71 is provided on the rear end cover piece 32 in order to fix the rear end cover piece 32 A configuration is adopted in which the member 71 is engaged with the hole member 26 of the loading section 8.
In the vicinity of the hole member 26, a proximity switch 27 is provided. The proximity switch 27 can detect whether the lowering member 71 is engaged with the hole member 26. The proximity switch 27 also serves as a closed state detection means for detecting that the cover member 10 is in the closed state, and the proximity switch 27 can detect whether the cover member 10 is in the closed state.
The proximity switch 27 is incorporated in the circuit 150 for energizing the solenoids SOLL and SOLR of the solenoid valve 132 as shown in FIG. The proximity switch 27 can shut off the supply of current to the solenoids SOLL and SOLR, and has a function of stopping the supply of hydraulic fluid to the pressing cylinder 24.
Then, in the present embodiment, the relay is brought into conduction only when the lowering member 71 detects that the lowering member 71 is engaged with the hole member 26, and the operator manually pushes the forward direction activation switch BS1 etc. Thus, the discharge device 11 is driven.

  Conversely, when the lowering member 71 does not detect that the lowering member 71 is engaged with the hole member 26, the drive circuit is cut off, and the discharge device 11 is disposed even if the operator presses the forward direction activation switch BS1 or the like. Does not start.

Therefore, when the box-like space 7 is opened and dust is put into the box-like space 7 from the side of the box-like space 7, the discharge device 11 is not activated against the intention, and the safety is high.
In addition, when the discharge device 11 is activated to discharge the dust in a state where the box-like space 7 is in the open state, the dust may overflow on the side surface of the vehicle. Therefore, it should be avoided to open the box-like space 7 and activate the discharge device 11 to discharge the dust. On the other hand, in the waste collection vehicle 1 of the present embodiment, if the box-like space 7 is in the open state, the discharge device 11 is not driven, the discharge device 11 is not activated even if the operator erroneously discharges the dust . For this reason, when moving the discharge plate 28 forward, it can be prevented that a hand or the like is pinched between the cover pieces 30.31 and 32 and the discharge plate 28. Therefore, the refuse collection vehicle 1 of the present embodiment is highly safe, and there is little concern that the refuse will be dropped around when the refuse is discharged.

In the embodiment described above, the discharge device 11 linearly moves the discharge plate 28 to push out the dust, but the box-like space 7 is provided with a conveyance device such as a belt conveyor, and the conveyance device It may be a discharge device of a structure to carry.
Since there is no member corresponding to the discharge plate 28 in the conveyance device such as a belt conveyor, there is no pinch of a hand or the like between the cover pieces 30.31 and 32 and the discharge plate 28.

  In the embodiment described above, the outer engagement pieces 50a and 50b and the inner engagement pieces 51a and 51b are attached in the direction of opening toward the rear end, but are attached in the direction of opening toward the front. May be That is, the outer engagement pieces 50a and 50b and the inner engagement pieces 51a and 51b may be opened in the same direction.

In the embodiment described above, the proximity switch 27 is adopted as the fixing detection means for detecting that the cover piece is fixed by the fixing means. That is, in the embodiment described above, an electrical switch is employed as the fixing detection means. When the switch does not detect that the cover piece is fixed, the supply of current to the motor for driving the hydraulic pump is cut off.
However, the present invention is not limited to this configuration, and a limit switch may be used instead of the proximity switch.
Alternatively, the proximity switch 27 or the limit switch may be used to switch on and off the circuit for operating the solenoid valve or the motor valve in the hydraulic circuit. That is, there is an electromagnetic valve or a motor valve between a hydraulic pump and a cylinder 206 (not shown), and the electromagnetic valve or the motor valve opens under the condition that the proximity switch 27 detects that the cover piece is fixed by the fixing means. Conversely, if the proximity switch 27 does not detect that the cover piece is fixed by the fixing means, the operator does not open the solenoid valve even if the manual switch for operating the discharge device 11 is turned on, and the discharge device 11 operates do not do.

In the embodiment described above, a handle member 60 extending outward is provided at the front end portion of the central cover piece 31, and the central cover piece 31 exceeds a predetermined amount with the handle member 60 as a locking portion and a rear cover piece 32 is used. Also adopted a structure that prevents moving backward.
In the present embodiment, the handle member 60 functions as a locking portion, but the present invention is not limited to this configuration, and a locking portion is provided separately from the handle, and the locking portion is a rear end cover piece 32 may be abutted.
The attachment position of the handle member (locking portion) 60 widens the overlapping area of the central cover piece 31 and the rear end cover piece 32 to open the side of the box-like space 7 widely, thereby facilitating the introduction of dust. Although it is desirable to provide at the front end of the central cover piece 31 for the purpose, it may be slightly backward. The position of the handle member (locking portion) 60 may be a position closer to the front than the center of the center cover piece 31 in the front-rear direction.
Further, it is conceivable to move the center cover piece 31 forward while leaving the rear end cover piece 32 closed to open the vicinity of the center in the front-rear direction of the side surface of the box-like space, and to throw in dust. In this case, the attachment position of the handle member (locking portion) 60 may be behind the center of the center cover piece 31 in the front-rear direction.

In the embodiment described above, the lock member 70 and the intermediate support bar (support portion) 62 are adopted as the coupling means for temporarily coupling the rear end cover piece and the center cover piece.
With regard to the positional relationship in which the rear end cover piece and the central cover piece are joined, it is preferable that when the central cover piece is closed as described above, it is easy to remove it when dust is caught on the rear end of the central cover piece. That is, when the rear end of the rear end cover piece is positioned in front of the rear end of the center cover piece, the two cover pieces may be connected. In this case, since the rear end cover piece does not cover the rear end of the central cover piece, it is easy to remove the dust.
The above-mentioned lock member 70 is recommended in that it is automatically engaged by colliding the intermediate support rod 62.
A carabiner-shaped lock member 100 as shown in FIG. 29 or a latch-shaped lock member 110 as shown in FIG. 30 can be considered to exert the same function.
The carabiner lock member 100 has a ring main body 101 and a rocking piece 102. The rocking piece 102 is rockable with respect to the ring main body portion 101, and is biased in a direction to press the dropout portion 103 of the ring main body portion 101 from the inside as shown in FIG. 29 (a).

When the middle support rod 62 collides with the rocking piece 102 of the lock member 100, the rocking piece 102 retracts as shown in FIG. 29 (b) and the dropout portion 103 is opened, as shown in FIG. 29 (c). The support rod 62 enters the closed space.
When the rear end cover piece 32 is moved rearward, as shown in FIG. 29D, the intermediate support rod 62 abuts against the inside of the rocking piece 102, but the rocking piece 102 does not open.

The latch-like lock member 110 is provided with the projecting and retracting piece 111 at the opening. The projecting and retracting piece 111 has an inclined surface on the outer side and a vertical surface on the inner side. The projecting and retracting piece 111 is laid by the spring 112 in the projecting direction.
There is a pick (release means) 113 on the emerging part 111, and the picking 113 can be operated to sink the emerging part 111.

When the intermediate support rod 62 collides with the projecting and retracting piece 111 of the lock member 110, the downward force of the projecting and retracting piece 111 acts by the action of the inclined surface of the projecting and retracting piece 111 as shown in FIG. Then the missing part 103 opens. Then, the intermediate support rod 62 enters the closed space as shown in FIG. 30 (c).
Conversely, even if the intermediate support rod 62 is pushed out of the closed space and pushes the projecting and retracting piece 111, since the inside of the projecting and retracting piece 111 is a vertical surface, no downward force is generated, and the projecting and retracting piece 111 does not fall down.

  As described above, the refuse collection vehicle 1 of the present embodiment has high safety because the cover pieces 30, 31, 32 do not close against intention even when used on a slope.

DESCRIPTION OF SYMBOLS 1 garbage collection vehicle 2 truck main body 3 garbage collection box 5 driver's seat 6 loading area 7 box-like space 8 loading space 10 cover member 11 discharge device 25 hole member 26 engagement piece 27 proximity switch 30 front end cover piece 31 center cover piece 32 back End cover pieces 35a, b, c Ceiling walls 36a, b, c Side walls 37a, b, c Side walls 38 High ceilings 40, 41 Low ceilings 43 Overhangs 50 Outer engagement pieces 51 Inner engagement pieces 45, 46 Space 56 Outer engagement piece 57 Inner engagement piece 60 Handle member (locking portion)
61 Vertical bar 62 Intermediate support bar (support) (engagement)
68 concave groove 70 locking member 71 lowering member 75 engaging piece 82 dropping rod 83 guide cylinder 91 slit 93 releasing member 100, 110 locking member

Claims (6)

There is a driver's seat in the area on the front side of the vehicle body, and there is a loading area on the rear side, and there is a box-like space for accommodating the load in the loading area. Waste collection vehicle with a discharge device that discharges
The box-like space is covered with a loading platform forming at least a floor section and a cover member covering the loading platform, and the cover member is composed of a plurality of cover pieces and installed at least at the rear end of the loading area An end cover piece and a central cover piece disposed adjacent thereto;
The two cover pieces are movable in the longitudinal direction of the vehicle body, and the cover member completely covers the side surface of the box-like space, and the open state partially or entirely opens the side surface of the box-like space. It is possible to configure
The cross-sectional area of the rear end cover piece is larger than the cross-sectional area of the central cover piece, and in the open state in which the side of the box-like space is opened by moving the cover piece, part or all of the central cover piece outside The rear end cover piece will cover the
The center cover piece has a locking portion that protrudes outward, and the locking portion abuts a part of the rear end cover piece, and the central cover piece moves rearward beyond the rear end cover piece by more than a fixed amount. Garbage truck characterized by blocking.   The cover member has coupling means for temporarily coupling the rear end cover piece and the central cover piece, and in the open state, the two cover pieces can be coupled by the coupling means. The refuse collection vehicle of item 1.   In the open state, the two cover pieces are joined by the coupling means, and the rear cover piece can cover the outside of a part or all of the central cover piece so that the two cover pieces can be moved forward and backward The refuse collection vehicle according to claim 2, characterized in that The coupling means has an engagement portion and a lock portion engaged with the engagement portion, the engagement portion is attached to the central cover piece, and the lock portion is attached to the rear end cover piece. ,
The lock portion has a lock portion side engagement piece and a release means, and when the engagement portion is caused to collide with the lock portion, the lock portion side engagement piece is moved by the force at that time and the engagement portion is moved. The refuse collection vehicle according to claim 2 or 3, wherein the engagement portion can be released by holding the lock and operating the release means.   The locking portion has a handle portion which is on the side of the cover piece and extends longitudinally with respect to the side wall of the cover piece, and a support portion which connects the handle portion and the side wall of the cover piece, The refuse collection vehicle according to any one of claims 2 to 4, characterized in that the part functions as an engagement part of the coupling means. In the loading area, there is a front end cover piece at the front position thereof, the front end cover piece is immovably fixed to the loading part, and in the open state, the central cover piece and the rear end cover piece are inclined to the front side The central cover piece covers the outer side of the front end cover piece, and the rear end cover piece covers the outer side of the central cover piece, and the area on the rear end side of the box-like space is opened;
In the closed state, the front end cover piece is on the front side, the central cover piece is behind it, and the rear end cover piece is behind it, and the vicinity of the end of adjacent cover pieces are overlapped. The refuse collection vehicle according to any one of claims 1 to 5, wherein the side surface of the box-like space is covered without any gap by the cover piece.

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