JPH0479898B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic lid opening/closing method for containers containing various fluids such as powder or liquid foods, which opens and closes the lid with the opening facing downward and slanting the lid to discharge the fluid. It is related to the device.

In this type of container, the container body is arranged so that its opening is slanted downward, and the lid that closes this opening is pivoted on the edge of the opening of the container body and provided on the inner surface of the lid so that it can be opened by its own weight. Some containers are designed to close the lid by rotating a cam by the rotation of a rotating shaft that engages the cam and engaging a latch piece on the container body. In the conventional technology, when opening and closing the lid, a manual rotating shaft was inserted into the cam of the lid and the cam was rotated by hand, which required a large amount of force from the operator and the lid was difficult to reach from the ground. The work was dangerous as it was located in a high place and required standing on a stand to open and close it.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic container lid opening/closing device that allows the container to be opened and closed safely without requiring any effort from the operator or requiring the operator to stand on a high platform.

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an automatic container lid opening/closing device 10 according to the present invention. A pin 16 is attached to the edge of the opening 14a of the container body 14 so that the opening 14a opens under the weight of the container body 14 disposed above.
It consists of a lid 18 which is pivotally supported by. The opening 14a of the container body 14 disposed on the upper frame 1 is connected to a conduit 3 extending from a receiver (not shown) mounted on the lower frame 2.
are in close contact with each other so that the fluid in the container 12 is introduced into the receiver via the conduit 3.

The lid 18 has a cam 20 provided on its inner surface, this cam 20 is rotatably supported by a bush 22, and its peripheral edge engages with a latch piece 24 of the container body 14 as the cam 20 rotates. The lid 18 is opened and closed by moving the lid 18 in and out. cam 20
has a protruding shaft 21 that passes through the bush 22 and protrudes to the outside of the lid 18, and this protruding shaft 21 is provided with a cross-shaped engagement portion 21a (see FIGS. 2 and 3).

As shown in FIG.
A rotary drive source 34 includes a rotating shaft 28 having a head 26 that engages with the rotary shaft 28, a motor 30 that rotates the rotating shaft 28, and a chain sprocket mechanism 32.
and a linear drive source 36 such as an air cylinder that linearly moves forward and backward relative to the protruding shaft 21 of the cam 20 while connecting the rotation source 28 to a rotation drive source 34.

As shown in FIGS. 1 and 4, the linear drive source 36 is a mounting frame 42 of a rotating mechanism 43, which is comprised of a mounting frame 42 rotatably mounted on a bracket 38 mounted on the lower frame 2 with a center pin 40. It is swingably supported by a pair of pivot pins 44, 44'. The inclination adjustment mechanism 46 consists of a pair of adjustment screws 52, 52' that engage both sides of a protrusion 48 protruding from the lower surface of the linear drive source 36 and are screwed into the mounting frame 42 via brackets 50, 50'. Therefore, by moving these adjusting screws 52, 52' back and forth in opposite directions, the inclination of the linear drive source 36 can be adjusted to the pivot pin 44, 52'.
It can be adjusted around 44'.

In the drawings, reference numeral 54 indicates a rubber plate disposed between the bracket 38 and the mounting frame 42 to prevent the mounting frame 42 from slipping, and reference numerals 56, 5
6' is a bracket 50, 50' and an adjusting screw 52, 5 to prevent the adjusting screw 52, 52' from loosening.
2' shows a spring provided between the heads 52a and 52a'. Further, reference numeral 58 is attached to the rotary shaft 28 between the head 26 and the inner wall of the conduit 3 in order to prevent the fluid discharged from the opening 14a from being contaminated by the device when the lid 18 is opened. It is a hood made of a flexible material or bellows provided around the lid 18 and the opening 14a.
It shows the packing that maintains fluid tightness between.

As shown in FIG. 1, the sprocket 32A to be connected to the rotation shaft of the chain sprocket mechanism 32 is connected to the rotation shaft so that the rotation drive source 34 is connected to the rotation shaft 28 regardless of whether the rotation shaft 28 advances or retreats. 28 with a spline connection. In addition, a linear drive source 3 is used to regulate the forward and backward movement of this rotating shaft 28.
The piston 36a of the cylinder 6 is equipped with a limit switch 62 for regulating the forward position and the backward position.
62', and a sprocket 32A connected to the rotating shaft 28 to regulate the rotation angle of the cam 20 so that the lid 18 is locked or released as shown in FIG.
Also provided is an operating member 68 that contacts limit switches 66, 66' that regulate the locked position and the unlocked position.

Next, to describe the operation of the device of the present invention, the operation member 64 of the piston 36a of the cylinder, which is normally the linear drive source 36 of the rotating shaft 28, is retracted until the limit switch 62' is closed, as shown by the dotted line in FIG. I'm doing it. When the linear drive source 36 is driven to advance the rotary shaft 28 in order to open the lid 18 of the container 12, the rotary shaft 28 moves forward as shown in FIGS.
The head 26 of 8 engages the cruciform protruding shaft 21 of the cam 20. This movement of the rotating shaft 28 is caused by the piston 36
The operating member 64 of a is stopped by closing the limit switch 62. Furthermore, the engagement between the head 26 and the cross-shaped protruding shaft 21 rotates the linear drive source 36 about the center pin 40 of the rotation mechanism 43, and also rotates the adjustment screws 52, 52' of the tilt adjustment mechanism 46 mutually. This can be ensured by adjusting the position of the head 26 by adjusting the screw in the opposite direction. Next, the rotational drive source 34 is driven until the limit switch 66' is closed, and the rotating shaft 28 is rotated until the cam 20 is in the unlocked position, thereby separating the cam 20 from the latching piece 24 of the container body 14. Thereafter, when the linear drive source 36 is driven in the opposite direction until the limit switch 62' is closed, the lid 18 opens under its own weight as the rotary shaft 28 retreats, and the fluid in the container body 14 is discharged through the conduit 3. After all the fluid has been discharged, the linear drive source 36 is driven in the forward direction, then the rotary drive source 34 is driven in the locking direction to lock the cam 20 to the latch piece 24, and finally the linear drive source 36 is driven in the locking direction to lock the cam 20 to the latch piece 24. Drive the device in the backward direction to close the lid 1.
Remove from 8.

As already mentioned, the hood 58 is made of a flexible material or a bellows, so it expands and contracts as the head 26 and the rotating shaft 28 move forward and backward, and also moves with the rotating shaft 28.
Since it twists as the lid 8 rotates, it does not interfere with opening and closing the lid 18.

According to the present invention, as described above, since the lid of the container can be automatically opened and closed, there is a practical benefit that work can be performed safely and efficiently.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of the automatic container lid opening/closing device according to the present invention, FIGS. 2 and 3 are enlarged side views and front views of the head of the rotating shaft that engages with the cam, and FIGS. 4 and 5. The figures are an enlarged side view and a front view of the rotation mechanism and the inclination adjustment mechanism, and FIG. 6 is a perspective view of the rotation angle regulating means of the rotational drive source. DESCRIPTION OF SYMBOLS 10... Container automatic lid opening/closing device, 12... Container, 14... Container body, 16... Pivot pin, 18
...Lid, 20...Cam, 21a...Cross-shaped engaging portion, 24...Latching piece, 26...Head, 28...
...rotating shaft, 34... rotary drive source, 36... linear drive source.

Claims (1)

[Claims] 1 Consisting of a container body arranged with the opening facing downward and diagonally, and a lid pivoted to the edge of the opening of the container body so as to open under its own weight, the lid being provided inside the container body. It has a rotatably supported cam, and by rotation of a rotating shaft that engages the cam from the outside of the lid, the peripheral edge of the cam engages with a latch piece on the container body, making the opening fluid-tight. An automatic lid opening/closing device for a container that closes and opens the container while maintaining the rotational drive source that rotates the rotation shaft;
Automatic lid opening/closing of a container characterized by comprising a linear drive source that moves linearly while being connected to the rotation shaft and its rotation drive source to engage the rotation shaft with the cam and disengage it from the cam. Device.