JP2020142601A - Cargo handling vehicle - Google Patents

Abstract

To reliably hold a cargo box at a limit angle with compact configuration.SOLUTION: In this cargo handling device, a foldable tilt stopper 20, which is located in the vicinity of a tilt cylinder 8 in a sub frame 10 and regulates tilt operation of a garbage storage box 3 at a prescribed limit angle α, is provided. A lower end of the tilt stopper 20 is rotatably connected to the sub frame 10, and an upper end thereof is rotatably connected to a bottom 3a of the garbage storage box 3, and the tilt stopper is so configured as to be foldable at an intermediate part thereof. When the tilt stopper is fixed in the state that the tilt stopper is straightly extended in the state that the garbage storage box 3 becomes the limit angle α, a stopper detection sensor 26 is operated, and a PLC 50 regulates operation of the tilt cylinder 8.SELECTED DRAWING: Figure 1B

Description

The present invention relates to a cargo handling vehicle, and more particularly to a tilt stopper that regulates the tilting motion of the cargo box.

Conventionally, in a garbage truck which is a kind of cargo handling vehicle, a dust input box is rotatably provided at the rear opening of the dust storage box, and the dust storage box is dumped (tilted) with the rear opening open. It is known that the dust inside is discharged. Since the dust loading box is very heavy because the dust loading device is built inside the dust loading box, when maintaining the tilted state during maintenance work, the dust is stored more than the predetermined limit angle. The box needs to be prevented from tilting.

Therefore, for example, it is known to provide a tension member having a roller pivotally supported at one end and a protrusion protruding from the other end, as in the case of the garbage truck of Patent Document 1. This one end is engaged with a guide member provided on the chassis to guide its movement, and the other end is engaged with an elongated hole formed in a pair of brackets protruding from the lower surface of the packing box. .. By lifting the tension member by the operator's hand and dropping the other end into the notch of the locking member, the packing box is prevented from rising.

On the other hand, as in Patent Document 2, there is known a dump truck in which a foldable swing stopper is provided and a gap is provided between the upper end of the vertical portion of the swing stopper and the lower end of the fixed stopper. In this dump truck, the swing stopper can be rotated by a pneumatic cylinder.

JP-A-55-47927 Japanese Unexamined Patent Publication No. 52-105421

However, in Patent Document 1, the operator must manually rotate the tension rod to the tension position, which is troublesome, and the tension rod is long and can be stored in the chassis side with many parts. It is difficult to secure a position.

Further, in Patent Document 2, after the packing box is lowered by the above gap and the fixed stopper and the swing stopper are brought into contact with each other, the packing box is not lowered any more, but as soon as the limit angle is reached. There is a need to prevent the packing box from rotating.

The present invention has been made in view of this point, and an object of the present invention is to securely hold a packing box at a limit angle in a compact configuration.

In order to achieve the above object, in the first invention,
The subframe provided on the chassis and
A packing box that can be tilted on the subframe via a tilting cylinder,
A foldable tilt stopper provided in the vicinity of the tilt cylinder in the subframe, and the packing box regulates the tilting operation of the packing box at a predetermined limit angle.
A control unit that controls the expansion and contraction of the tilting cylinder,
A stopper detection sensor that is electrically connected to the control unit,
Is equipped with
The tilt stopper is configured so that the lower end is rotatably connected to the subframe and the upper end is rotatably connected to the bottom of the packing box so that the tilt stopper can be folded at the middle portion. When the packing box is fixed in a straightened extended state at the limit angle, the stopper detection sensor is activated, and the control unit is configured to regulate the operation of the tilting cylinder.

According to the above configuration, the tilt stopper can be folded in the middle portion, so that when the packing box is not tilted, it is housed compactly. Then, when the box is extended straight at the limit angle and the state is fixed, the control unit can immediately regulate the tilting operation of the box by the action of the stopper detection sensor. As a result, two types of regulation can be performed at the same time, that is, the tilting operation of the packing box is mechanically regulated by the tilting stopper, while the control control is performed by the control unit. Therefore, the packing box can be set at the limit angle during maintenance work. Can be held securely with.

In the second invention, in the first invention,
The tilt stopper is
A first frame whose lower end is rotatably connected to the subframe,
A second frame in which the upper end is slidably and rotatably connected to the bottom of the packing box and the lower end is slidably and rotatably connected to the upper end of the first frame.
It is provided with a detected portion provided at the upper end of the second frame.
The stopper is detected when the first frame and the second frame are displaced and fixed in a straight line while being moved relative to each other from the bending standby state of the tilting stopper when the packing box reaches the limit angle. The sensor is configured to detect the detected unit and the control unit regulates the operation of the tilting cylinder.

According to the above configuration, the tilt stopper is brought into a straight stretched state by the relative movement of the first frame and the second frame at the limit angle, and the stretched first frame and the second frame are mutually extended. Since the detected unit is detected by the stopper detection sensor at the position switched to the fixed state, the control unit can regulate the tilting operation of the packing box as soon as the tilting stopper is fixed. Further, both ends of the first frame are connected to the subframe and the second frame, and both ends of the second frame are connected to the packing box and the first frame, so that the first frame and the second frame can be connected. The angle formed by the connecting portion of the box can be increased as the tilt angle of the packing box increases. As a result, in the bending standby state, which indicates a state in which the first frame and the second frame are naturally bent at the limit angle of the packing box, the angle formed by the connecting portion between the first frame and the second frame is sufficiently increased from the folded state. Since it can be done, the movement of manually bringing it from the bending standby state to the extended state is small, and the workability is excellent. Further, the tilt stopper does not naturally enter the extended state at the limit angle of the packing box unless it is manually brought from the bent standby state to the extended state. As a result, the tilt stopper is unintentionally changed from the extended state to the fixed state, and then the operator tilts the packing box, which causes unintended damage to the tilting stopper and the packing box. There is no. As a result, the tilting motion of the packing box can be reliably regulated only when necessary.

In the third invention, in the second invention,
The second frame is integrally provided with a handle portion, and by pulling the handle portion, the tilt stopper is configured to change from the bending standby state to the extending state.
The handle portion is arranged so that at least a part of the handle portion overlaps with the first frame in the side view in the folded state of the tilt stopper at which the tilt angle of the packing box is 0 °.

According to the above configuration, the tilt stopper can be changed from the bent standby state to the extended state by pulling the handle, so that the packing box can be raised and lowered as usual when the operation is not performed, and when the operation is performed, the packing box can be easily raised and lowered. The tilting motion can be stopped. Further, since the handle portion is provided at a position where the handle portion overlaps with the first frame in the side view when the tilt angle is 0 ° in the folded state, the tilt stopper is accommodated when the tilt angle of the packing box is 0 °. Space becomes smaller.

In the fourth invention, in the third invention,
At the lower end of the second frame, a first elongated hole through which an intermediate pin provided at the upper end of the first frame is inserted is formed.
At the upper end of the second frame, a second elongated hole through which a box-side pin provided at the bottom of the packing box is inserted is formed.
In the second frame, the intermediate pin is moved to the lower end side of the first elongated hole, the box side pin is moved to the lower end side of the second elongated hole, and the intermediate pin is straightened. 1 A person who moves the box side pin to the upper end side of the elongated hole and engages the first frame in a fixed state in which the box side pin is moved to the upper end side of the second elongated hole to prevent the tilt stopper from bending. A joint is provided.

According to the above configuration, after the tilt stopper shifts from the folded state to the extended state by using the first elongated hole and the second elongated hole, the engaging portion of the second frame is first pressed by pushing down the second frame. Engages with the frame and the tilt stopper is securely held in a fixed state.

In the fifth invention, in the third or fourth invention,
The lower end of the tilting cylinder is rotatably supported by a cross member provided on the subframe.
The lower end of the first frame is also rotatably supported by the cross member.
The subframe is provided with a cushion member that supports the upper end of the first frame in the tilting stopper in the folded state.

According to the above configuration, since the first frame is securely supported by the cushion member in the folded state and is stable, it is less likely to vibrate during traveling or the like. Further, since the cushion member can regulate the upper end of the first frame (the connecting portion with the second frame) from rotating downward from the position of the subframe, the storage space for the tilt stopper is reduced.

As described above, according to the present invention, the packing box is provided with a foldable tilting stopper that regulates the tilting motion of the packing box at a predetermined limit angle, and the packing box has the first frame and the second frame of the tilting stopper at the limit angle. A stopper detection sensor that detects that the frame has been switched to the fixed state is provided, and the control unit regulates the operation of the tilting cylinder based on the detection of this stopper detection sensor, so the packing box can be compactly configured. It can be reliably held at the limit angle.

It is a side view which shows the tilt stopper of the garbage truck which concerns on embodiment of this invention when the tilt angle of a dust storage box is 0 °, and the periphery thereof enlarged. It is a side view which shows the tilt stopper of the garbage truck which concerns on embodiment of this invention when the tilt angle of a dust storage box is a limit angle, and its periphery partially enlarged. It is a side view which shows the garbage truck which concerns on embodiment of this invention. It is an arrow view seen from the direction III of FIG. 1A. It is a hydraulic circuit diagram of the garbage truck which concerns on embodiment of this invention. It is a control circuit diagram of the garbage truck which concerns on embodiment of this invention. It is a side view which shows the dust storage box before tilting with the dust input box open. It is a side view which shows the state of the tilt stopper when the dust storage box tilts a little with the dust input box open. It is a side view which shows the state of the tilt stopper when the dust storage box is further tilted with the dust input box open. It is a side view which shows the tilt stopper of the bending standby state when the dust storage box is tilted to a limit angle. It is a side view which shows the tilting stopper fixed in the limit angle of the dust storage box.

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

FIG. 2 shows a garbage truck 1 as a cargo handling vehicle according to an embodiment of the present invention, and a dust storage box 3 as a cargo box is mounted on a chassis 2 of the garbage truck 1. The rear opening 4 of the dust storage box 3 is provided with a dust charging box 6 pivotally supported by a charging box support pin 5 above the dust storage box 3. A dust loading port 7 is opened at the rear of the dust loading box 6, and a dust loading device is installed inside the port. The dust loading device is for compressing the dust thrown into the dust loading box 6 through the dust loading port 7 and loading it into the dust storage box 3.

The dust loading device may be a compression type having a sliding plate and a compression plate, but in the present embodiment, it is a rotary type. Although not shown in detail, in the dust loading device, the intermediate portion is supported by the side wall of the dust loading box 6 and one end side is swung in the front-rear direction, and the tip of the rod rotates on the other end of the pushing plate. A push cylinder 15 that is freely supported and operates a push plate, a rotary plate that can rotate around the base end, and a hydraulic motor 16 that is connected to the rotary plate via a speed reducer to rotate the rotary plate. (Both are shown only in FIG. 4). The dust thrown into the dust input box 6 is compressed and loaded into the dust storage box 3 by the cooperation between the rotating operation of the rotating plate and the swinging operation of the pushing plate configured in this way.

The dust storage box 3 is configured to be tiltable (dumpable) about the tilt shaft 10a behind the subframe 10 by expanding and contracting the tilt cylinder 8 as a tilt device provided on the subframe 10 on the chassis 2. There is. Further, the dust input box 6 is configured to be rotatable around the input box support pin 5 by a rotating cylinder 9 provided between the dust storage box 3 and the dust input box 6.

As shown in FIG. 4, the garbage truck 1 includes a power take-off device (PTO) 41 driven by the engine 40 of the chassis 2. Various hydraulic devices 30 including the rotating cylinder 9 are driven by the power of the power extraction device 41. The hydraulic device 30 includes a hydraulic pump 51 driven by the power extraction device 41 and a hydraulic tank 62 for storing hydraulic oil, and the hydraulic oil in the hydraulic tank 62 is sucked up by the hydraulic pump 51 to supply hydraulic piping on the supply side. It is configured to be distributed to 61a and supplied to the control valve 63. Then, the hydraulic oil that has passed through the control valve 63 flows through the hydraulic pipe 61b on the recovery side, is filtered by the return filter 64, and then is recovered again in the hydraulic tank 62. The rotating cylinder 9, the tilting cylinder 8, and the like are connected to the control valve 63 via the hydraulic pipe 61c.

As shown in FIG. 5, the control valve 63 is configured to be controlled by the PLC 50 as a control unit. The control valve 63 includes a plurality of solenoid valves SOL-C to H and the like shown in FIG. 5, and by switching the opening / closing port of the solenoid valve by the PLC 50, the hydraulic oil discharged from the hydraulic pump 51 is supplied to a desired cylinder. Is to be supplied. As a result, switching of the expansion / contraction operation of the rotating cylinder 9, the tilting cylinder 8 and the like is controlled or the operation is stopped according to the operation of various switches such as the dump switch 80.

Then, as shown in FIG. 1B, the lower end of the tilting cylinder 8 is rotatably supported by the tilting cylinder mounting bracket 10c provided in the left and right intermediate portions of the cross member 10b provided on the subframe 10 so as to extend left and right. ing. Since the cross member 10b supports the heavy members of the dust storage box 3 and the dust input box 6, it is relatively rigid as compared with other members. The upper end of the tilting cylinder 8 is rotatably connected to the bottom portion 3a of the dust storage box 3.

A foldable tilt stopper 20 that prevents the dust storage box 3 from tilting more than a predetermined limit angle α is rotatably connected to the stopper mounting bracket 10d provided on the rear surface of the cross member 10b. There is. The limit angle α is, for example, 45 °.

The lower end of the tilt stopper 20 is rotatably connected to the first frame 21 whose lower end is rotatably connected to the stopper mounting bracket 10d, and the upper end is slidably and rotatably connected to the bottom 3a of the dust storage box 3. Is provided with a second frame 22 which is slidably and rotatably connected to the upper end of the first frame 21.

The first frame 21 has, for example, a square pipe shape, and its lower end is rotatably connected to a first lower pin 21a provided on the stopper mounting bracket 10d.

As shown in FIG. 3, in the second frame 22, for example, the first plate-shaped member 22a and the second plate-shaped member 22e arranged at a distance larger than the width of the first frame 21 are engaged with each other. It has a shape connected by a connecting plate 22b. The first plate-shaped member 22a is arranged inside the second plate-shaped member 22e in the vehicle width direction. Further, the width of the first plate-shaped member 22a with respect to the longitudinal direction is formed to be slightly larger than the width of the second plate-shaped member 22e with respect to the longitudinal direction. As shown in FIG. 1B, a first elongated hole 22c through which an intermediate pin 23 provided at the upper end of the first frame 21 is inserted is formed at the lower end of the second frame 22. On the other hand, at the upper end of the second frame 22, a second elongated hole 22d through which the box-side pin 24 provided in the bottom 3a of the dust storage box 3 is inserted is formed. The first elongated hole 22c and the second elongated hole 22d are formed so as to extend in the longitudinal direction of the second frame 22. Further, the first elongated hole 22c is longer than the second elongated hole 22d. The box-side pin 24 is supported by a mounting bracket of the cross girder 3b provided on the bottom 3a of the dust storage box 3.

As shown in FIG. 1B, a handle portion 25 is integrally provided on the first plate-shaped member 22a of the second frame 22. The handle portion 25 is configured to be in an extended state by pulling the tilt stopper 20 forward in the vehicle while in the bending standby state. In the extended state, the intermediate pin 23 is moved to the lower end side of the first elongated hole 22c, the upper box side pin 24 is moved to the lower end side of the second elongated hole 22d, and the first frame 21 and the second frame 22 are brought together. It is in a straightened state. By pushing the handle portion 25 toward the first frame 21 from this extended state, the intermediate pin 23 of the second frame 22 is moved to the upper end side of the first elongated hole 22c, and the upper box side pin 24 is moved. It is moved to the upper end end side of the second elongated hole 22d so that it is in a fixed state. In this fixed state, the inner surface side of the lower end portion of the connecting plate 22b of the second frame 22 and the outer surface side of the upper end portion of the first frame 21 are engaged with each other.

On the other hand, the handle portion 25 is arranged so that at least a part of the handle portion 25 overlaps with the first frame 21 in a side view in a folded state of the tilt stopper 20 in which the tilt angle of the dust storage box 3 is 0 °. ..

A stopper detection sensor 26 is provided near the upper end of the second frame 22 at the bottom 3a of the dust storage box 3 to detect that the dust storage box 3 has reached the limit angle α and regulate the operation of the tilting cylinder 8. There is. The stopper detection sensor 26 is electrically connected to the PLC 50. The stopper detection sensor 26 includes, for example, a proximity sensor, but may be a mechanical limit switch. On the other hand, a tongue-shaped detected portion 27 is provided protruding from the upper end of the first plate-shaped member 22a in the second frame 22. When the dust storage box 3 has a limit angle α and the tilt stopper 20 is fixed, the detection unit 26a of the stopper detection sensor 26 detects the detected portion 27 of the second frame 22. ..

Further, as shown in FIG. 1A, the subframe 10 is provided with a cushion member 28 that supports the upper end portion of the first frame 21 in the folded state. The cushion member 28 is made of, for example, a truncated cone-shaped rubber cushion, but its shape and the like are not particularly limited.

Next, the operation of the garbage truck 1 according to the present embodiment will be described.

When traveling and loading dust, which is shown by a solid line in FIG. 2, the dust loading box 6 is closed with respect to the dust storage box 3, and the dust storage box 3 is in a state where the tilt angle is 0 ° on the subframe 10. It is in. At this time, the tilt stopper 20 is housed in the subframe 10 in a folded state in which the second frame 22 overlaps the first frame 21, and the upper end portion of the first frame 21 is supported by the cushion member 28. Since the tilt stopper 20 including the second frame 22 having elongated holes 22c and 22d at both ends is securely supported by the cushion member 28 in the folded state and is stable, it is unlikely to vibrate during traveling or the like.

Then, in order to discharge the dust in the dust storage box 3, first, the rotating cylinder 9 is extended, and the dust charging box 6 is rotated upward in FIG. 6A. In this state, as shown in FIG. 1A, the tilting cylinder 8 is in the reduced state, and the tilting stopper 20 is not moving either.

Next, when the operator raises the dump switch 80 (see FIG. 5) to drive the tilting cylinder 8 via the PLC 50, the dust storage box 3 starts tilting. Along with this, the folded tilt stopper 20 also starts to move in conjunction with it.

Next, as shown in FIGS. 6B and 6C, the tilt stopper 20 also rises as the tilt cylinder 8 extends. At this time, the intermediate pin 23 moves in the first elongated hole 22c to the lower end side of the first elongated hole 22c, and the box side pin 24 moves in the second elongated hole 22d to the upper end side of the second elongated hole 22d. To do. Then, as the tilt angle of the dust storage box 3 increases, the angle formed by the first frame 21 and the second frame 22 increases.

Then, as shown in FIG. 6D, the angle of the dust storage box 3 becomes the limit angle α. Under the control of the tilting cylinder 8, this limit angle α becomes the maximum standing angle and does not tilt any more. At this time, the tilt stopper 20 is in a bending standby state while being bent. In this bending standby state, the first elongated hole 22c is longer than the second elongated hole 22d, so that the rotational moment applied to the upper end of the first frame 21 and the lower end of the second frame 22 by gravity unintentionally causes the first. It is possible to prevent the 1st frame 21 and the 2nd frame 22 from being straightened.

Next, when the dump switch 80 is lowered from the state where the angle of the dust storage box 3 is the limit angle α after the discharge work or the like, the tilt cylinder 8 is contracted by the PLC 50 so that the tilt angle becomes small. Tilt. When this tilting is started, the tilting stopper 20 remains in the bending standby state, so that the tilting of the dust storage box 3 is not hindered.

On the other hand, when maintenance work must be performed under the dust storage box 3, the operator manually holds the handle portion 25 of the tilt stopper 20 in the bending standby state, as shown by the alternate long and short dash line in FIG. 1B. Hold and gradually pull up the handle 25 toward the front of the vehicle. Then, the intermediate pin 23 is on the lower end side of the first elongated hole 22c, the box side pin 24 is on the lower end side of the second elongated hole 22d, and the tilt stopper 20 is in a straight extended state. At this time, the detected portion 27 of the second frame 22 is not detected because it is not directly in front of the detection portion 26a of the stopper detection sensor 26.

Next, when the operator holds the handle portion 25 by hand and pushes down the second frame 22 toward the first frame 21, the intermediate pin 23 moves to the upper end side of the first elongated hole 22c, and the box side pin 24 is the second. It moves to the upper end side of the elongated hole 22d. At this time, as shown in an enlarged view of the arrow in FIG. 1B, the first frame is in contact with the inner surface side of the lower end portion of the connecting plate 22b as the engaging portion and the outer surface side of the upper end portion of the first frame 21. The second frame 22 engages with the 21 and is in a fixed state. When this fixed state is reached, the detected portion 27 of the second frame 22 comes directly in front of the detection portion 26a of the stopper detection sensor 26 and is detected.

That is, the stopper detection sensor 26 shown in FIG. 5 is turned on, and the on signal is input to the PLC 50. The PLC 50 uses an on signal from the stopper detection sensor 26 as a trigger to send a stop signal to the control valve 63 to stop the expansion / contraction operation of the tilt cylinder 8. While the ON signal from the stopper detection sensor 26 is input to the PLC 50, the PLC 50 does not accept the operation even if the operator operates the dump switch 80. As a result, when one worker enters under the tilted dust storage box 3 for maintenance work, even if another worker accidentally lowers the dump switch 80, the dust storage box 3 is used. Box 3 does not move in the downward direction and is safe. Further, if a trouble occurs in which the hydraulic pressure is released while the dust storage box 3 is tilted upward or when the dust storage box 3 is tilted to the limit angle α and the tilt stopper 20 is fixed, the dust storage box 3 may fall backward. Since the tilting stopper 20 pulls the dust storage box 3, it is possible to prevent the tilting cylinder 8 from being damaged or the vehicle from tipping over.

On the other hand, when the maintenance work of the dust is completed and the dust storage box 3 is lowered, the operator holds the handle portion 25 by hand and holds the second frame 22 as the first frame, as shown by the alternate long and short dash line in FIG. 1B. When it is pulled up to the opposite side of 21, the fixed state is released and the extended state is reached. Specifically, when the second frame 22 is pulled up, the intermediate pin 23 moves to the lower end side of the first elongated hole 22c, and the box side pin 24 moves to the lower end side of the second elongated hole 22d. As a result, the engagement between the inner surface side of the lower end portion of the connecting plate 22b and the outer surface side of the upper end portion of the first frame 21 is released.

Next, the operator holds the handle portion 25 of the tilt stopper 20 in the extended state by hand and pushes down the second frame 22 toward the rear of the vehicle. As a result, the tilt stopper 20 changes from the extended state to the bent standby state.

At this time, since the second elongated hole 22d near the bent portion is longer than the first elongated hole 22c, the tilt stopper 20 is likely to be bent when the handle portion 25 is pushed. Then, since the detected portion 27 is out of the detection region of the stopper detection sensor 26, the tilting cylinder 8 can be operated.

Next, the operator lowers the dump switch 80 and operates it. Then, the tilting cylinder 8 is reduced by the PLC 50, the tilting angle of the dust storage box 3 becomes smaller, and finally the tilting angle becomes 0 °. As a result, the tilt stopper 20 is in a folded state.

As described above, in the present embodiment, the tilt stopper 20 smoothly rotates between the folded state and the extended state by the first elongated hole 22c and the second elongated hole 22d.

Further, the tilt stopper 20 is brought into a straight stretched state by pulling the handle portion 25 and moving the first frame 21 and the second frame 22 relative to each other at the limit angle α, and further, the first frame in the stretched state. Since the detected portion 27 is detected by the stopper detection sensor 26 at the position where the 21 and the second frame 22 are switched to the fixed state in which they are fixed to each other, the packing box tilts as soon as the tilt stopper 20 is fixed. Operation can be regulated.

As described above, according to the garbage truck 1 of the present embodiment, the garbage truck 3 can be reliably held at the limit angle α in a compact configuration.

(Other embodiments)
The present invention may have the following configuration with respect to the above embodiment.

For example, in the above embodiment, the cargo handling vehicle is a garbage truck, but it may be a vehicle having a tiltable packing box such as a dump truck.

Further, in the above embodiment, in the second frame 22, the handle portion 25 is provided on the first plate-shaped member 22a arranged inside the second plate-shaped member 22e in the vehicle width direction, but the present invention relates to this. Not limited to this, the handle portion may be provided on the second plate-shaped member arranged outside the vehicle width direction from the first plate-shaped member.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and applications.

1 Garbage truck (cargo handling vehicle)
2 chassis
3 Garbage storage box (packing box)
3a bottom
3b horizontal girder
4 Rear opening
5 Input box support pin
6 Garbage input box
7 Garbage inlet
8 tilting cylinder
9 Rotating cylinder
10 subframes
10a tilt axis
10b cross member
10c tilting cylinder mounting bracket
10d stopper mounting bracket
15 Push-in cylinder
16 Hydraulic motor
20 Tilt stopper
21 1st frame
21a 1st lower pin
22 2nd frame
22a Plate-shaped member
22b Connecting plate (engaging part)
22c 1st slot
22d second elongated hole
23 Intermediate pin
24 Box side pin
25 Handle
26 Stopper detection sensor
26a detector
27 Detected part
28 Cushion member
30 Hydraulic equipment
40 engine
41 Power take-out device
50 PLC
51 Hydraulic pump
61a hydraulic piping
61b hydraulic piping
61c hydraulic piping
62 Hydraulic tank
63 Control valve
64 Return filter
80 dump switch

Claims (5)

The subframe provided on the chassis and
A packing box that can be tilted on the subframe via a tilting cylinder,
A foldable tilt stopper provided in the vicinity of the tilt cylinder in the subframe, and the packing box regulates the tilting operation of the packing box at a predetermined limit angle.
A control unit that controls the expansion and contraction of the tilting cylinder,
A stopper detection sensor that is electrically connected to the control unit,
Is equipped with
The tilt stopper is configured so that the lower end is rotatably connected to the subframe and the upper end is rotatably connected to the bottom of the packing box so that the tilt stopper can be folded at the middle portion. When the packing box is fixed in a straightened extended state at the limit angle, the stopper detection sensor is activated and the control unit is configured to regulate the operation of the tilting cylinder. Cargo handling vehicle. In the cargo handling vehicle according to claim 1,
The tilt stopper is
A first frame whose lower end is rotatably connected to the subframe,
A second frame in which the upper end is slidably and rotatably connected to the bottom of the packing box and the lower end is slidably and rotatably connected to the upper end of the first frame.
It is provided with a detected portion provided at the upper end of the second frame.
The stopper is detected when the first frame and the second frame are displaced and fixed in a straight line while being moved relative to each other from the bending standby state of the tilting stopper when the packing box reaches the limit angle. A cargo handling vehicle characterized in that a sensor detects the detected unit and the control unit regulates the operation of the tilting cylinder. In the cargo handling vehicle according to claim 2,
The second frame is integrally provided with a handle portion, and by pulling the handle portion, the tilt stopper is configured to change from the bending standby state to the extending state.
In the folded state of the tilt stopper at which the tilt angle of the packing box is 0 °, the handle portion is arranged so that at least a part of the handle portion overlaps with the first frame in a side view. Cargo handling vehicle to do. In the cargo handling vehicle according to claim 3,
At the lower end of the second frame, a first elongated hole through which an intermediate pin provided at the upper end of the first frame is inserted is formed.
At the upper end of the second frame, a second elongated hole through which a box-side pin provided at the bottom of the packing box is inserted is formed.
In the second frame, the intermediate pin is moved to the lower end side of the first elongated hole, the box side pin is moved to the lower end side of the second elongated hole, and the intermediate pin is straightened. 1 A person who moves the box side pin to the upper end side of the elongated hole and engages the first frame in a fixed state in which the box side pin is moved to the upper end side of the second elongated hole to prevent the tilt stopper from bending. A cargo handling vehicle characterized by having a joint. In the cargo handling vehicle according to claim 3 or 4,
The lower end of the tilting cylinder is rotatably supported by a cross member provided on the subframe.
The lower end of the first frame is also rotatably supported by the cross member.
A cargo handling vehicle characterized in that the subframe is provided with a cushion member that supports an upper end portion of the first frame in the tilting stopper in a folded state.

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