JPS5930577B2 - Rear lid opening/closing device for tank vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rear lid opening/closing device for a tank vehicle such as a sludge truck.

In Japanese Utility Model Publication No. 52-9685, the present applicant has already mounted a tank having a rear lid at the rear end on the vehicle body frame so that it can be tilted, and the lid is automatically opened as the tank is tilted. In addition, when the tank is tilted, the automatic lid opening/closing mechanism is deactivated as necessary to keep the lid open/closed when the tank is tilted. We also proposed an opening/closing device for the rear lid that enabled efficient drainage in a short time, but this device required both the locking/unlocking operation of the locking device and the insertion/removal operation of the connecting pin, and the automatic opening/closing mechanism for the opening/closing lid was not possible. The operation control is relatively cumbersome and troublesome, and there is a problem that it is easy to cause malfunction.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rear lid opening/closing device for a tank vehicle that is easy to operate and operates reliably.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.A tank 2 mounted on a vehicle body frame 1 is rotated to the rear end of the vehicle body frame 1 via a pivot shaft 4 from a bracket 3Vr- fixed at its lower end. In addition, the tip of a hydraulic cylinder 5 whose base end is pivotally connected to the vehicle body frame 1 is pivotally supported on the side of the tank 2, and by the extension operation of this hydraulic cylinder 5, the tank 2 is moved rearward around a pivot 4. It can be tilted to

A rear cover 6 that can close the open rear end of the tank 2 is supported 7 in a freely openable and closable manner on the rear part of the tank 2.

On the side of the tank 2, a stacking rod 8 is rotatably supported at its intermediate portion by a pivot pin 9, and at the front end of the stacking rod 8, one end is pivoted 10 to the side of the rear lid 6. First series of rods 1
When the other end of the second connecting rod 17 is pivotally connected 12, the upper end of the second connecting rod 17, whose lower end is pivotally supported 16 to the center of the arm body 15, is connected to the rear end of the stacking rod 8. has been done.

At the center of the first series rod 11, when the inner circumferential surface curves into a substantially semicircular shape, a retaining part 14 whose outer circumferential part is reinforced by the reinforcing member 13 is formed, and this engaging part 14 can be detachably engaged with the pivot pin 9, and when engaged, the center of the pivot pin 9 is located above the central axis of the first series rod 11, The rearward pressing force applied to the first series of rods 11 in the direction of opening the rear lid 6 rotates the stacking rod 8 counterclockwise around the pivot pin 9 to hold the rear lid 6 in the closed position. It works like this.

The arm body 15 is pivotally supported 20 at its base end to a bracket 19 fixed to the vehicle body frame 1 so as to be able to rise and fall freely, and a locking pin 21 is protruded from the tip thereof.
The base end of an operating lever 24, which has a hook-shaped locking member 23 integrally formed thereon, is rotatably supported on a bracket 22 which is fixed to the vehicle body frame 1 opposite to the bracket 22, using a rotation shaft 25. By rotating the operating lever 240, the hook-shaped locking member 23 can be engaged with and disengaged from the locking pin 21 of the arm body 15.

Although only the left side of the main part is shown in FIG. 2, a mechanism similar to that shown in FIG. 2 is also provided on the right side.

A drain pipe 26 for draining liquid such as moisture in the tank 2 is connected to the rear lower end of the tank 2, and a cock 2γ is interposed in the middle of the drain pipe 26.

Next, to explain the operation of this embodiment, first, the rear cover 6 is automatically opened as the tank 2 is tilted, and the tank 2 is opened automatically.
When discharging the contents inside, move the operating lever 24 to the second position.
When the locking member 23 is rotated to the solid line position shown in the figure to engage the locking pin 21 protruding from the tip of the arm body 15, and the tank 2 is tilted backward by the extension of the hydraulic cylinder 5,
As shown by the three-dot chain line in FIG. 2, the second connecting rod 17 is rotated backward around the pivot point 16 at its lower end, and the stacking rod 8 is rotated clockwise around the pivot pin 9. ,・Accordingly, the semicircular retaining portion 14 of the first series of rods 11! The first series of rods 11 is pushed backward by the clockwise rotation of the stacking rod 8, and the rear cover 6 is rotated around the pivot portion 7 to open it. - Contents in the tank 2 can be discharged to the outside through the rear end opening.

・Also, when tilting the tank 2 while holding the rear lid 6 in the closed state to drain liquid such as moisture inside the tank 2, use the operating lever 24 to move the locking member 23 to the arm 15. When the tank 2 is tilted after being released from the locking pin 21 so that the arm body 15 can freely rise and fall around the 20 pivot points at its base end, the tank 2 is tilted, as shown by the three-dot chain line in Fig. 2. As the tank 2 tilts, the arm body 15 gradually stands up from the prone position and rotates clockwise around the 20 pivot points, but the loading rod 8 receives rotational force from the second connecting rod 17. Tank 2 without receiving
Since the first series rod 11 is kept at the same relative position from beginning to end, the first series rod 11 is prevented from moving rearward by the engagement between the engaging portion 14 and the pivot pin 9.

Therefore, the tank 2 can be tilted to a predetermined position while the rear lid 6 is kept closed.

At this time, if the cock 27 of the drain pipe 26 is opened, the content in the tank 2 consisting only of liquid such as moisture can be discharged.

In this case, the first series of rods 11 constitutes a toggle mechanism as described above, and the rearward traction force applied to the first series of rods 11 due to the opening force acting on the rear lid 6 when the tank 2 is tilted moves the stacking rods 8. This stopper engaging portion 14 works to rotate counterclockwise.
is urged in the direction of increasing the engagement force with the pivot pin 9, so that the engagement between them is firmly maintained.

The securing force of the rear lid 6 will not be loosened.

As described above, according to the present invention, the rear end of the stacking rod 8, which is pivotally supported on the side surface of the tank 2 by the pivot pin 9, is pivoted 16 to the arm body 15, which is swingably supported on the vehicle body frame 1. Second series of rods 17
When the pivot link 18 is connected, the rear cover 6 is attached to the front end of the stacking rod 8.
A first series of rods 11 which are pivotally connected to each other are pivotally connected 12, and an engaging portion 14 provided at an intermediate portion of the first series of rods 11 is connected to the pivot pin 9.
A locking member 23 is provided on the side surface of the vehicle body frame 1 to allow the arm body 15 to freely engage and disengage from the vehicle body frame 1 and to prevent the arm body 15 from swinging. The tank 2 can be tilted while being held in the closed position by the rear lid 6, or while being automatically opened, by being swingable or fixed.

Therefore, when the tank 2 is tilted, the opening/closing of the rear cover 6 can be controlled very simply and easily by simply engaging and disengaging the locking member 23, and since there is only one operation point, the rear cover 6 can be easily controlled by simply engaging and disengaging the locking member 23. There is no risk of malfunction or operation of the device 6, and reliable opening/closing operation can be guaranteed.

[Brief explanation of the drawing]

The figures show an embodiment of the apparatus of the present invention, and FIG. 1 is an overall side view of a sludge truck equipped with the apparatus of the present invention, and FIG. 2 is a partially cutaway enlarged view of the rear part thereof. 1...Vehicle frame, 2...Tank, 6...Rear lid, 7
... Pivotal support, 8... Stacking rod, 9... Pivotal support pin, 10.
... Pivot connection, 11... First series rod, 12... Pivot connection,
14... Engagement part, 15... Arm body, 16... Pivot support,
17...Second connecting rod, 18...Pivotal connection, 20...
Pivot, 23...Locking member.

Claims (1)

[Claims] 1 In a tank vehicle in which a rear lid 6 is freely opened/closed at the rear end and a pivot support 7 Lk tank 2 is mounted on the vehicle body frame 1 so as to be tiltable, the middle part of the stacking rod 8 is attached to the side of the tank 2 by a pivot pin 9 When the first series of rods 11, which are rotatably supported and pivoted 10 to the rear cover 6, are pivotally connected to the front ends of the pile rods 8, the rear ends of the pile rods 8 are connected. , pivotably supported 20 on the vehicle body frame 1
The engaging portion 1 is pivotably connected to a second connecting rod 17 which is pivotally supported 16 to the arm body 15 to be attached, and is formed at the intermediate portion of the first connecting rod 11.
4 is removably engaged with the pivot pin 9, and a locking member 23 is provided on the side surface of the body frame 1 to prevent the arm 15 from swinging. Switchgear.