JPH0522483Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a locking device for locking the opening/closing door of a garbage storage container attached to a transport vehicle body.

[Conventional technology]

In recent years, the distance from urban areas to garbage incineration plants and landfills where garbage is disposed of has become increasingly distant, and the garbage collected by garbage trucks is first collected at a garbage transfer station set up on the ground, and then transferred to garbage storage. The waste is stored in containers and transported by transport vehicles to incinerators, landfills, etc.

Transport vehicles transporting such containers are
Container 3 on the rear frame 2 as shown in the figure.
is installed so that it can be dumped,
An opening 5 having an opening/closing door 4 at the rear of the container 3
By dumping the container 3 against the frame 2 and opening the opening/closing door 4 as shown by the chain line in the figure, the garbage inside the container 3 can be removed from the opening 5.
It is designed to be discharged from

[The problem that the idea aims to solve]

By the way, the locking device for locking the opening/closing door to the container in the above-mentioned container has conventionally been
As shown in FIG. 11, a lid lever 41 connected to a cylinder 40 is slidably attached to the side wall of the container 3, and the lid lever 41 is locked by engaging with a fixing pin 42 provided on the opening/closing door 4. The lever 41 is operated by driving the cylinder 40.

However, in the device having the above structure, when the pressure inside the cylinder 40 is loosened while the transport vehicle is running, the fixing pin 42
There is a drawback that the lid lever 41 becomes unlatched and the opening/closing door 4 is opened, causing an accident in which dust is scattered.

Furthermore, if the container is full of compressed garbage, the pressure of the garbage will exert a force on the opening/closing door 4 to try to open it, so the engagement between the foot lever 41 and the fixing pin 42 will be slightly reduced. However, if it loosened, there was a risk that the door 4 would become unlocked.

Further, a sealing material 43 is provided between the opening 5 of the container 3 and the opening/closing door 4 to prevent sewage contained in the stored garbage from leaking to the outside. Foot lever 4
1 is simply hooked onto the fixing pin 42 to stop the movement, the door 4 is securely attached to the container 3
This had the disadvantage that it could not be crimped to the outside, causing sewage to leak outside and harm the environment.

This idea was made in view of the above-mentioned drawbacks, and it is possible to lock and release the opening/closing door without using a cylinder, and also to securely press the opening/closing door against the container to prevent sewage leakage. The purpose is to provide equipment.

[Means to solve the problem]

In order to solve the above problems, this invention provides an opening 5 having an opening/closing door 4 at the rear of a garbage storage container 3 that is attached to the frame 2 of a transport vehicle so that it can be dumped, and the rear end of the container 3 A long hole 27 in the front-rear direction is provided, and a support shaft 26 provided at the center of the foot lever 22 is movably and rotatably fitted into the long hole 27, so that one end of the foot lever 22 is attached to the opening/closing door 4. A fixing pin 9 to be engaged is provided, and a crankshaft 16 extending in the lateral direction of the container is rotatably provided on the lower surface of the container 3.
A crank arm 17 and a second crank arm 18 are provided, one end of a connecting rod 20 is rotatably connected to the tip of the first crank arm 17, and a cam roller 19 is rotatably connected to the tip of the second crank arm 18.
The other end of the connecting rod 20 and the other end of the foot lever 22 are rotatably connected, and a cam plate 28 provided on the frame 2 slides into contact with the cam roller 19 when the container 3 is installed on the frame 2. ,
Move the second crank arm 18 forward and upward until the rotation center 35 of the cam roller 19 is above the line b passing through the connection point 34 of the connection rod 20 and the foot lever 22 and the center position 33 of the crankshaft 16. A stopper 36 is provided on the container 3 to stop the rotation of the crankshaft 16 at a position where the center of rotation of the cam roller exceeds the line b. At the top, there is an engaging part 31 that comes into contact with the cam roller 19 when the container 3 is dumped on the frame 2.
, and the distance in the front-rear direction at which the engaging portion 31 maintains the contact state with the cam roller 19 is set to be larger than the movement stroke of the support shaft 26 within the elongated hole 27.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIGS. 1 to 4, the garbage storage container 3 is provided with a plurality of self-propelled wheels 6 on its lower surface, and is removably mounted on the rear frame 2 of the transport vehicle 1. This container 3 is frame 2
When installed in a fixed position above, movement in the front and back direction can be stopped by an arbitrary fixing means (not shown), and the dump fulcrum shaft 7 provided on the frame 2 is used as a fulcrum by driving a hydraulic cylinder or the like. It is now dumped as .

An opening 5 for discharging garbage is provided at the rear end of the container 3, and at the upper end of the opening 5,
An opening/closing door 4 for opening and closing the opening 5 is rotatably mounted on a shaft 8. The opening/closing door 4 has fixing pins 9, 9 attached to a bracket 11 hanging down on both sides of the lower end.
A sealing material 10 is attached to the inner surface of the container 3 so as to surround the opening 5 as shown in FIG.

Further, as shown in FIGS. 4 to 7, a crankshaft 16 extending in the width direction is rotatably attached to the lower surface of the container 3 via bearings 12 and 13. A first crank arm 17, 17 and a second crank arm 18 are integrally formed on the circumferential surface of the crankshaft 16 and project in the same direction with the same phase, and a cam roller 19 is attached to the tip of the second crank arm 18. is rotatably mounted.

Further, one ends of connecting rods 20, 20 are rotatably connected to the tips of the first crank arms 17, 17, respectively, and the other ends of the connecting rods 20, 20 are connected via a connecting fitting 21 and a pin 14. It is rotatably connected to a lever lever 22 at the rear of the container 3. Further, an operating lever 24 for manually rotating the crankshaft 16 is connected to the crankshaft 16 via a rotating member 15.

The hook lever 22 has a hook portion 23 at the tip.
It is a substantially L-shaped plate material with a part thereof movably fitted inside a two-pronged bracket 25 attached to the bottom surface of the container 3. A horizontal support shaft 26 is provided at the center of the foot lever 22, and the support shaft 26 fits into a longitudinally elongated hole 27 formed in the bracket 25. Within the range of movement within 27, it is movable in the front-back direction and rotatable in the up-down direction. Further, the foot lever 22 is supported by the support shaft 26 and the connecting rod 20 so that the hook portion 23 at the tip thereof moves and swings on the fixing pin 9 of the opening/closing door 4. In this case,
As shown in FIG. 7, when the support shaft 26 is located at the front end of the elongated hole 27, the hook portion 23 is set to engage with the fixing pin 9.

Note that a threaded portion 20a is formed between the end of the connecting rod 20 and the connecting fitting 21, and by screwing the connecting fitting 21 into the threaded portion 20a and changing the amount of penetration into the connecting rod 20, Hook portion 23 from crankshaft 16 to fixing pin 9
The distance to the engagement position can be adjusted.

On the other hand, a cam plate 28 is attached to the upper surface of the frame 2 in correspondence with the position of the crankshaft 16, and a cam roller 1 is attached to the cam plate 28.
A cam surface 29 is formed which 9 engages with. This cam surface 29 comes into sliding contact with the cam roller 19 when the lower surface of the container 3 is installed on the frame 2, and the rotation center 35 of the cam roller 19 is the center of the connection point 34 of the connecting rod 20 and the foot lever 22 and the crankshaft 16. The second crank arm 18 is rotated forward and upward until it is above the line b passing through the position 33.

Furthermore, an engaging portion 31 extending in the front-rear direction that comes into contact with the cam roller 19 when the container 3 is dumped from the frame 2 is provided on the upper part of the cam plate 28 . A fitting portion 30 into which the cam roller 19 fits is provided between them.

Further, as shown in FIG. 7, on the lower surface of the container 3, when the rotation center 35 of the cam roller 19 crosses the line b and the second crank arm 18 rotates, A stopper 36 is attached that comes into contact with the crankshaft 16 to stop the rotation of the crankshaft 16. In addition, when the stopper 36 and the second crank arm 18 are in contact with each other, the cam roller 1
A gap 32 is provided between the surface of cam plate 9 and the inner surface of cam plate 28 to allow movement of cam roller 19 when the center of rotation of cam roller 19 crosses line b. Note that the position setting of the center position 33 can be adjusted by changing the screwing amount of the connecting fitting 21 into the connecting rod 20.

Further, as shown in FIG. 10, the engagement distance l ₁ at which the engagement portion 31 and the cam roller 19 continue to be in contact when the container 3 is dumped is the long hole 2
The movement stroke l ₂ of the support shaft 26 within the 7 is set larger than that of the support shaft 26 .

This embodiment has the structure described above.
Next, its effect will be explained.

When the container 3 is attached to the frame 2 of the transport vehicle 1 as shown in FIG. 7, the cam roller 19 fits into the fitting part 30 of the cam plate 28, and the crank arm 18 comes into contact with the stopper 36, causing the crankshaft 16 movement is restricted, foot lever 22
The support shaft 26 is located at the front end of the elongated hole 27, and the hook portion 23 is engaged with the fixing pin 9 of the opening/closing door 4, thereby locking the opening/closing door 4 to the container 3.

In this locked state, the center position 33 of the crankshaft 16 is the same as that of the cam roller 19.
Set at a position beyond line a (dead point line of link) connecting 35 and 34 (below line a) of the triangle formed by the rotation center 35 of has been done. In this state,
For example, when a force is applied to the opening/closing door 4 in the direction of opening due to the pressure of the garbage stored inside the container 3, the foot lever 22 tries to rotate counterclockwise (in the direction of detaching from the fixing pin 9) about the support shaft 26 as a fulcrum in FIG. . At this time, a tensile force acts on the connecting rod 20, but since the center position 33 of the crankshaft 16 is below the line a, the cam roller 19 is
Try to rotate clockwise using 3 as a fulcrum. However, this clockwise rotation of the cam roller 19 is stopped by the stopper 36 that is in contact with the crank arm 18, and the locked state is maintained.

This self-holding lock state is achieved by the crankshaft 16
It can be released by positioning the center position 33 of the foot lever 2 above the line a.
Since the clockwise rotation of 2 is stopped by the fixing pin 9, the locked state cannot be released from the hook lever 22 side. That is, the container 3 is dumped as described below, and the cam roller 19 is
The locked state can be released by engaging the engaging portion 31 and rotating the crankshaft 16. Therefore, even when the container 3 is being transported or left for a long time at a garbage transfer station, etc.,
The opening/closing door 4 can be stably held in a locked state.

As shown in FIG. 8, when the container 3 is dumped from the state attached to the transport vehicle as described above, the crankshaft 16 rises. At this time, since the cam roller 19 is in contact with the engaging portion 31, the second
The crank arm 18 rotates to the left with respect to the crankshaft 16. When the rotation center 35 of the cam roller 19 coincides with the above line b (the line connecting the center position 33 and the connection point 34), the cam roller 19 moves slightly forward from the locked state, so the first crank arm 17 is connected. The lever 22 is retracted by pulling the rod 20 slightly forward, and the opening/closing door 4 is further pressed against the sealing material 10 accordingly. Next, as the container is dumped further, the cam roller 19
The center of rotation 35 is below the line b, and as the container rises, the second crank arm 18 rotates, the first crank arm 17 also rotates, and the connecting rod 20 touches the lower end of the foot lever 22. Push backwards. In this case, the engaging portion 31 and the cam roller 19
The engagement distance l ₁ is the movement stroke l ₂ of the support shaft 26
Since the connecting rod 20 is larger, after the support shaft 26 reaches the rear end of the elongated hole 27, the connecting rod 20 is further inserted into the foot lever 2.
Press 2. Therefore, the foot lever 22 rotates counterclockwise about the support shaft 26 as a fulcrum. As a result, the hook portion 23 of the hook lever 22 and the fixing pin 9 are disengaged, and the locking state of the opening/closing door 4 is released.

On the other hand, when the dumped container 3 is grounded on the frame 2 as shown in FIG.
9 is guided to the fitting portion 30 along the cam surface 29, the crankshaft 16 rotates clockwise, and the connecting rod 20 pulls the lever 22 forward. As a result, the hook lever 22 rotates about the fulcrum shaft that has come to the front end of the elongated hole, and the hook portion 23 engages with the fixing pin 9. Furthermore, the connecting rod 20 moves forward, thereby moving the fixing pin 9 forward. Pull it in and lock the opening/closing door 4 to the container 3. In this way, the lid lever 22 pulls in the door 4 and presses it around the opening 5, so that the sealing material 10 is firmly attached between the door 4 and the container 3, preventing leakage of sewage. .

[Effect of idea]

As explained above, according to the present invention, the locking device of the opening/closing door uses the dead point of the link to self-maintain the locking state, so that a stable locking state of the opening/closing door is obtained and the container is locked. It is possible to eliminate accidents in which the opening/closing door opens inadvertently during transportation or when left unattended for a long period of time. Further, even if a force in the direction of opening is applied to the opening/closing door due to the reaction force of the garbage inside the container, the locked state is maintained by itself, so opening accidents can be prevented.

In addition, the lid lever is movable back and forth, and the opening/closing door is pulled into the container and locked while being crimped. This ensures a tight seal between the opening/closing door and the container, and prevents leakage of sewage to the outside. I can do it.

Furthermore, since no cylinder is used, the structure is simple, and the opening/closing door can be locked and unlocked by dumping the container onto the frame of the transport vehicle or by grounding it, so the operator can lock and release the door every time garbage is discharged. This has the advantage that there is no need to perform a release operation, and the workability is excellent.

[Brief explanation of the drawing]

Figure 1 is a front view of a transport vehicle with a garbage storage container attached, Figure 2 is a partially vertical front view showing the container, Figure 3 is a partially vertical side view of the same as above, and Figure 4 is a bottom view of the same as above. , FIG. 5 is a perspective view showing the locking device of the embodiment, FIG. 6 is a diagram showing the main part of FIG. The figure shows the main part of the embodiment, No. 11.
The figure shows a conventional structure. DESCRIPTION OF SYMBOLS 1... Transportation vehicle, 2... Frame, 3... Container, 4... Opening/closing door, 5... Opening, 9... Fixing pin, 10... Seal material, 16... Crankshaft, 1
7...First crank arm, 18...Second crank arm, 19...Cam roller, 20...Connecting rod, 22...Hook lever, 23...Hook part,
26... Support shaft, 27... Long hole, 28... Cam plate, 29... Cam surface, 30... Fitting part, 31
...Engagement portion, 32...Gap, 33...Center position, 34...Connection point, 35...Rotation center, 36...
...Stotsupa.

Claims (1)

[Scope of utility model registration request] An opening 5 having an opening/closing door 4 is provided at the rear of a garbage storage container 3 that is attached to the frame 2 of a transport vehicle so that it can be dumped, and an elongated hole 27 in the longitudinal direction is provided at the rear end of the container 3. A support shaft 26 provided at the center of the foot lever 22 is movably and rotatably fitted into the opening/closing door 4.
A fixing pin 9 with which one end of the foot lever 22 engages is provided, a crankshaft 16 extending in the lateral direction of the container is rotatably provided on the lower surface of the container 3, and protrusions in the same direction are provided on the circumferential surface of the crankshaft 16. A first crank arm 17 and a second crank arm 18 are provided, and one end of a connecting rod 20 is connected to the tip of the first crank arm 17.
A cam roller 19 is rotatably connected to the tip of each of the connecting rods 20 and the other end of the foot lever 22, and the container is connected to a cam plate 28 provided on the frame 2. 3
is in sliding contact with the cam roller 19 when installed on the frame 2, and the rotation center 35 of the cam roller 19 is above the line b passing through the connecting point 34 of the connecting rod 20 and the foot lever 22 and the center position 33 of the crankshaft 16. A cam surface 29 is provided that rotates the second crank arm 18 forward and upward until the rotation of the crankshaft 16 is stopped at a position where the center of rotation of the cam roller exceeds the line b. A stopper 36 is provided to stop the cam plate 28.
The container 3 is placed on the top of the cam surface 29 of the frame 2.
An engaging portion 31 that comes into contact with the cam roller 19 when dumped is provided, and the cam roller 1 of this engaging portion 31 is provided.
The distance in the front and back direction where the contact state with 9 is maintained is
A locking device for an opening/closing door in a garbage storage container, characterized in that the stroke is set larger than the movement stroke of the support shaft 26 in the long hole 27.