JPS589196Y2 - Lid opening/closing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lid opening/closing device that automatically opens and closes the lid by winding in and letting out a cable.

In this invention, a lid that can be opened and closed by operating a cable is hinged to one end of a swingable lever, and when the lid is opened, the opening and closing cables are automatically sent out even if the center of gravity of the lid passes over the hinge pin. To provide a lid opening/closing device that rotates and swings out a lid in a closing direction.

Next, an embodiment of the present invention will be described with reference to the drawings.

The one shown in the figure is an annealing furnace with a lid opening/closing device according to the present invention applied to the lid of the annealing furnace. Stage 2 is installed at the upper part around the furnace.

In addition, on both sides of the furnace, supporting columns 3 supporting traveling overhead cranes (not shown) for loading and unloading products are erected at intervals, and between the sides of the furnace and the columns 3. is set narrowly.

Reference numeral 4 denotes a lid for opening and closing the opening 5 of the furnace, and a lid arm 6 is attached to the center of the lid, with one end slightly protruding from the edge of the lid.

On the other hand, a lever 7 hingedly connected to the lid 4 is swingably provided on the stage 2.

That is, the lever 7 is of a bell crank type in the embodiment,
It is attached to a horizontal support shaft 9 penetrated through the upper part of a lever receiving member 8 erected on the stage 2 so as to be swingable with respect to the furnace.
Pulleys 10 and 11 are rotatably attached to both ends of the lever by hinge pins 12 and 13.

The tip of the protrusion 6' of the arm 6 with a lid is pivotally attached to the hinge pin 12 to which the pulley 10 is attached, and the lid 4 and the lever 7 are hingedly connected.

A guide pulley 14 is provided on the pillar 3 erected near the lever 7 and located above the lever 7.

15 is a cable for opening and closing the lid 4; one end is fixed to the upper surface of the lid, and the other end is a pulley 10 that is attached to the lever 7 via a guide pulley 14.
．． 11 and is wound around a winding drum 17 with an electric motor installed on a stand 16 fixed to a support 3.

At 18, when the lid 4 is rotated in the opening direction R by the winding of the cable 15 and opened almost vertically, the center of gravity G of the lid is located between the support shaft 9 of the lever and the hinge pin 12 that pivots the lid. A stopper is attached to the pillar 3 to stop the lid from opening.

In the position shown in FIG. 3 where the lid 4 is fully opened, a rotational moment is applied to the lever 7 in the closing direction S about its support shaft 9 due to the weight of the lid that is attached to the pivot point of the lever 7 that pivotally connects the lid. arise.

As a means for applying the rotational moment to the lid 4, a push member 19 that engages with the lever 7 is provided on the back surface of the lid arm 6.

This pushing member 19 may be provided on the lever 7 side.

Reference numeral 20 denotes a stopper which determines the stop position of the lever 7 which rotates in the closing direction S together with the lid when the cable 15 is fed out, and is welded to the lever receiving member 8.

Reference numeral 21 denotes a stopper against which the lever 7 rotates when the lid 4 is opened vertically, and is welded to the column 3.

Next, a case will be described in which the lid 4 is opened from the closed state in the above configuration.

When the lid is closed as shown by the solid line in FIG. 2, when the cable 15 is wound up by the winding drum 17, the lid 4 rotates in the opening direction R of the arrow around the hinge pin 12 and reaches the position A indicated by the two-dot chain line. A push member 19 provided on the back side of the arm 6 with a lid comes into contact with the lever 7.

When the cable is further wound up, the lever 7 rotates together with the lid around the support shaft 9 in the direction B, and as the lid 4 hits the stopper 18, the lever 7 almost simultaneously hits the stopper 21, resulting in the open state shown in FIG. 3. .

In this open state, the lever stop positioning stopper 20 and the contact surface of the lever 7 are separated to some extent.

Further, the center of gravity G of the lid is designed to be located between the support shaft 9 of the lever and the hinge pin 12 to which the lid is attached when the lid is in the open state.

In the case of closing, when the winding drum 17 is operated in the cable sending direction, a moment is applied to the lever 7 due to the weight of the lid 4 to rotate the lever in the direction of the arrow T. Therefore, when the cable 15 is loosened, the lever 7 moves to the support shaft. Rotate around 9.

This rotational force is applied to the push member 1 provided between the lever 7 and the lid 4.
9 to the lid, and swings out the lid in the closing direction to the position shown in FIG. 2A.

The center of gravity of the swung-out lid is located in front of the hinge pin 12,
Further, the lever 7 hits the stopper 20 and stops.

When the cable 15 is further extended, the lid 4 rotates under its own weight around the hinge pin 12, and the opening 5 is closed by the lid as shown in FIG.

Conventionally, for example, the lid closing device for annealing furnaces used in steel mills, etc., attaches a suspension rope to the lid and uses an overhead crane to lift it up via the rope with a hook and move it to another location. It was lifted by a crane and carried over the furnace and lowered into the opening.

However, hoisting the lid with a crane and moving it to another location requires the work of rigging each time, the time required to transport the lid, and other costs.
There are problems that need to be improved, such as the need for space to place the lid, labor saving, improved workability, and other effective use of space.

In this invention, even when the lid is fully opened almost vertically and the center of gravity of the lid passes over the hinge pin, the lid is automatically swung in the closing direction using the lever action of the lid's own weight. The lid opening and closing time is significantly shortened without the need for manpower, resulting in labor savings and improved work efficiency.Also, since the lid opens almost vertically, it does not interfere with loading and unloading or transporting items. Since the opening/closing angle is almost vertical, the opening/closing space is small.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a plan view of the present invention implemented in an annealing furnace; Fig. 2 is a partially cutaway side view of the lid closed; and Fig. 3 is a lid open state. FIG. 4 is a plan view of a portion of the swinging lever for attaching the lid. 1: Furnace (container), 4: Lid, 5: Opening, 7: Lever, 9
: Support shaft, 10: Pulley, 11: Pulley, 12: Hinge pin, 14: Guide pulley, 15: Cable, 17: Winding drum, 18: Stopper, 19: Pushing member (means for applying rotational moment to the lid) 20: Stopper (lever stop positioning), S
...Closing direction, G: Center of gravity.

Claims (1)

[Scope of utility model registration request] A lever is supported on a horizontal support shaft fixed to the outside of the opening of a container having an upward opening, is swingable about the shaft with respect to the opening, and is equipped with a pulley at each end. A lid for opening and closing the opening is hinged to the pulley provided at the end closer to the opening, and has one end fixed to the upper surface of the lid, and the other end is attached above the lever. A lid opening/closing circumferential cable is wound around each pulley provided at both ends of the lever via a guiding pulley provided at the lever, and is wound around the winding drum, the lid is opened almost vertically, and its center of gravity is aligned with the support shaft of the lever; A stopper that stops the opening of the lid when it is located between the hinge pin that pivotally connects the lid, and a stopper that stops the opening of the lid when it is located between the hinge pin that pivotally connects the lid, and a stopper that closes the lid around its support shaft on the hinged lever at the beginning of swinging the lid from the fully open position in the closing direction. A lid opening/closing device comprising means for applying a rotational moment acting in the direction to the lid, and a stopper for determining a stop position of the lever, which rotates together with the lid in the closing direction when the cable is fed out.