JPH0633004Y2 - Gas damper drive type lid opening / closing device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a gas damper drive type lid opening / closing device used for a grating lid or the like that closes upper surface openings such as snow melting grooves and joint grooves installed on a sidewalk. It is about.

[Prior Art] As disclosed in Japanese Utility Model Laid-Open No. 57-133660, it has been conventionally practiced to reduce the labor load at the time of opening the lid by utilizing the gas pressure sealed in the cylinder of the gas damper. And the fixed frame 31 as illustrated in FIG.
The base end of the lid 32 is pivotally attached to the base by the horizontal pivot 33, and the upper end of the fixing bracket 34 is fixed to the base 35 of the fixing frame 31 at a position below the horizontal pivot 33, and the cylinder of the gas damper 36 is secured. Mounting end 38 of 37 Horizontal pivot 33
It is pivotally attached to the tip of the lid 32 by a horizontal pivot 39 parallel to the gas damper 3 at a position below the base 35.
The mounting end 41 of the rod 40 of No. 6 is pivotally attached to the lower end of the fixed bracket 4 by a horizontal pivot 42 parallel to the horizontal pivot 33.

[Problems to be Solved by the Invention] In this conventional device, the gas damper 36 rotates upward about the horizontal pivot 42 as shown by the chain line in FIG. At the final stage beyond the 33 side, the lid 32 makes 90 degrees with respect to the horizontal plane.

In this way, when the lid 32 is opened and rotated to a predetermined angle, the piston fixed to the inner end of the rod 42 is in contact with the end block of the cylinder 37 through which the rod 42 penetrates, and the gas damper 36 moves to the maximum. It is in a stretched state.

However, due to the play space existing between the fixed frame body 31 and the lid 32, the lid 32 can be opened up to about 130 degrees, so that the lid 3 can be opened by an excessive pulling operation by a worker or the like.
When 2 is opened and rotated beyond the predetermined angle, an excessive force is applied to the piston, the end block, the connecting portion between the piston and the rod, and the like in the gas damper 36 in the maximum stretched state. The damper 36 will be damaged or destroyed.

Therefore, an object of the present invention is to provide a gas damper drive type lid opening / closing device in which the gas damper is not damaged or destroyed by excessive opening of the lid.

[Means for Solving the Problem] The gas damper drive type lid opening / closing device of the present invention will be described below with reference to the accompanying drawings. And the upper end of the rocking bracket 4 is pivotally attached to the fixed frame 1 by a horizontal pivot 5 parallel to the horizontal pivot 3 at a position below the horizontal pivot 3, and the mounting end of the cylinder 7 of the gas damper 6 is attached. The portion 8 is pivotally attached to the front end of the lid 2 by a horizontal pivot 9 parallel to the horizontal pivot 3, and the gas damper 6 is located at a position below the horizontal pivot 5.
The mounting end 11 of the rod 10 of the above is pivotally attached to the lower end of the swing bracket 4 by a horizontal pivot 12 parallel to the horizontal pivot 3,
The lid 2 is provided by the pressure of the gas sealed in the cylinder.
Is always urged to rotate in the opening direction.

[Embodiment] In the illustrated embodiment, the swing bracket 4 is manufactured by bending a metal plate into a stepped shape, and as shown in FIG. 2, a horizontal pivot 5 is provided at the upper end of the swing bracket 4. A bearing tube 13 to be inserted is welded, and a bearing plate 14 into which the horizontal pivot 12 is inserted is welded to one side surface of the lower end portion of the swing bracket 4. A rectangular bearing block 16 through which the horizontal pivot 5 is inserted is welded to the lower surface of the fixed frame body 1 and the side surface of the base frame 15.

The bearing cylinder 13 is arranged between a pair of front and rear bearing blocks 16, 16, and the bearing cylinder 13, the bearing block 16 and the horizontal pivot 5 are screw numbers for rotatably connecting the swing bracket 4 to the fixed frame body 1. Are configured. A bearing plate 19 of a horizontal pivot 9 is fixed to the tip of the lid 2 by bolting.

In the lid closed state, the horizontal pivot 5 is located diagonally below the horizontal pivot 3, and the horizontal pivot 12 is located diagonally below the horizontal pivot 5. A reinforcing plate 17 having a U-shaped horizontal cross section is welded to the other side surface of the lower end portion of the swing bracket 4.

As shown in FIG. 2, the reinforcing plate 17 is in contact with the groove wall surface 18 at a predetermined angle while the cover 2 is rotated up to 90 degrees and fixedly supports the position occupied by the horizontal pivot 12. The lid 2 is 90
When rotating more than a degree, the reinforcing plate 17 moves away from the groove wall surface 18 as shown by the arrow in FIG.

This lid opening / closing device is usually provided in front and rear with respect to one lid 2, but the number of attachments can be increased or decreased according to the size and weight of the lid 2.

[Operation] The lid 2 is constantly urged to rotate in the opening direction by the gas damper 6, but the rotational force in the opening direction by the gas damper 6 is set to a certain extent smaller than the rotational force in the closing direction due to the gravity of the lid 2. Therefore, the lid 2 is stably held in the closed state.

The tip of the lid 2 is pulled up manually by a worker so as to cancel the difference between the rotational force in the opening / closing direction and the rotational force in the opening direction.
When the end of the open rotation is given to, the rod 10 of the gas damper 6 extends from the cylinder 7, and the lid 2 starts the open rotation about the horizontal pivot 3 by the urging force of the gas damper 6.

As the opening rotation of the lid 2 progresses, the gas damper 6 rotates upward about the horizontal pivot 12 as shown by the chain line in FIG. 1, and the vertical surface standing on the horizontal pivot 12 moves toward the horizontal pivot 3 side.
At the final stage, which is about 0 degree, the lid 2 makes 90 degrees with respect to the horizontal plane as shown by the chain line in FIG. The lid 2 thus opened to the predetermined angle is held in the open position by the urging force of the gas damper 6 extended to the maximum extent.

Until the end edge surface 2a of the lid 2 comes into contact with the end edge surface 1a of the fixed frame 1 by excessive pulling operation, the lid 2 is excessively opened about 50 degrees from the predetermined angle as shown in FIG. When rotated, the swing bracket 4 rotates upward about the horizontal pivot 5 as shown in FIG. 2, and accordingly, the horizontal pivot 12 on which the mounting end 11 of the rod 10 of the gas damper 6 is pivotally attached.
Also moves upwards. Due to the escape rotation of the swing bracket 4 as described above, the gas damper 6 maintains the stretched state at the stage where the gas damper 6 is opened and rotated to the predetermined angle, and the force is not further received in the stretched state.

[Effects of the Invention] As described above, in the gas damper drive type lid opening / closing device of the present invention, the upper end of the swing bracket 4 is located at a position below the horizontal pivot 3 of the lid 2 and the horizontal pivot 5 is parallel to the horizontal pivot 3. Is pivotally attached to the fixed frame 1 by means of the horizontal axis 5, and the mounting end 11 of the rod 10 of the gas damper 6 is attached to the lower end of the swing bracket 4 by a horizontal axis 12 parallel to the horizontal axis 3 at a position below the horizontal axis 5. Since the lid 2 is pivotally attached, even if the lid 2 excessively rotates beyond a predetermined angle, the swing bracket 4 escapes and rotates around the horizontal pivot 5, so that the gas damper 6 is prevented from being excessively extended and the gas damper 6 is prevented from rotating. Does not cause damage or destruction.

[Brief description of drawings]

1 is a front view of a gas damper drive type lid opening / closing device according to an embodiment of the present invention in a lid closed state, and FIG. 2 is an enlarged vertical sectional view of a swing bracket portion of the lid opening / closing device. FIG. 3 is a front view of the lid opening / closing device with the lid opened. FIG. 4 is a front view of a conventional gas damper drive type lid opening / closing device. 1 ... Fixed frame body, 2 ... Lid, 3 ... Horizontal pivot, 4 ... Swing bracket, 5 ... Horizontal pivot, 6 ... Gas damper,
7 ... Cylinder, 8 ... Mounting end, 9 ... Horizontal pivot,
10 ... Rod, 11 ... Mounting end, 12 ... Horizontal pivot

Claims (1)

[Scope of utility model registration request] 1. A horizontal pivot shaft in which a base end portion of a lid (2) is pivotally attached to a fixed frame body (1) by a horizontal pivot shaft (3), and an upper end portion of a swing bracket (4) at a position lower than the horizontal pivot shaft (3) is parallel to the horizontal pivot shaft (3). 5
Is pivoted to the fixed frame body 1 by means of which the mounting end portion 8 of the cylinder 7 of the gas damper 6 is pivotally attached to the tip end portion of the lid 2 by means of a horizontal pivot shaft 9 parallel to the horizontal pivot shaft 3, and a position below the horizontal pivot shaft 5. At the mounting end 11 of the rod 10 of the gas damper 6
Is driven by a horizontal pivot 12 parallel to the horizontal pivot 3 to the lower end of the swing bracket 4, and the lid 2 is constantly urged to rotate in the opening direction by the pressure of the gas sealed in the cylinder 7. Lid opening and closing device.