JPH0633005Y2 - 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 openings such as snow melting grooves and common grooves installed on sidewalks. It is a thing.

[Prior Art] As disclosed in Japanese Utility Model Laid-Open No. 57-133660, it has been conventionally performed 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. There is.

In the conventional apparatus shown in FIG. 3, the base end portion of the lid 32 is pivotally attached to the fixed frame body 31 by the horizontal pivot shaft 33, and the upper end portion of the fixing bracket 34 is fixed to the fixed frame body 31 at a position below the horizontal pivot shaft 33. Of the gas damper 36, the mounting end 38 of the cylinder 37 of the gas damper 36 is pivotally attached to the tip of the lid 32 by a horizontal pivot shaft 39, and the rod of the gas damper 36 is positioned below the base portion 35. A mounting end 41 of 40 is pivotally attached to the lower end of the fixed bracket 34 by a horizontal pivot 42 parallel to the horizontal pivot 33.

In this conventional device, as shown by the chain line in FIG. 3, the gas damper 36 rotates upward about the horizontal pivot 42, and at the final stage when the vertical surface standing on the horizontal pivot 42 is crossed to the horizontal pivot 33 side, The lid 32 forms 90 degrees with 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.

[Problem to be Solved by the Invention] Accordingly, 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 release of the lid.

[Means for Solving the Problem] Hereinafter, referring to the reference numerals in the accompanying drawings, in the gas damper drive type lid opening / closing device of the present invention, the base end portion of the lid 2 is fixed to the fixed frame body 1 by the horizontal pivot 3 The base end portion of the swing bracket 13 is pivotally attached to the tip end side of the lid 2 by the horizontal pivot shaft 15.

The mounting end 8 of the cylinder 7 of the gas damper 6 is pivotally attached to the tip of the swing bracket 13 on the opposite side of the horizontal pivot 15 with respect to the horizontal pivot 15.

At a position below the horizontal pivot 3, the mounting end 11 of the rod 10 of the gas damper 6 is pivotally attached to the fixed bearing body 5 by the horizontal pivot 12, and the lid 2 is opened by the pressure of the gas sealed in the cylinder 7. Bias in the direction of rotation.

[Embodiment] In the illustrated embodiment, the swing bracket 13 is manufactured by bending a metal plate such that the base end side is inclined obliquely downward with respect to the main body portion 13a. A bearing tube 14 into which a horizontal pivot 15 is inserted is welded to the portion. A horizontal pivot 15, which is parallel to the horizontal pivot 3, is attached to the cross rail 18 of the lid 2.

On the lower surface of the tip of the swing bracket 13, a horizontal pivot 9
A pair of bearing plates 16 through which the is inserted are welded. The mounting substrate 4 is fixed to the opening side wall 21 of the common groove by bolts 22, and the fixed bearing body 5 is welded to the mounting substrate 4. The horizontal pivot 12 parallel to the horizontal pivot 3 has a fixed bearing body 5
Has been inserted into. The horizontal pivot 12 is located diagonally below the horizontal pivots 3 and 9.

As shown in FIG. 1, the main portion 1 of the swing bracket 13
3a is in contact with the support surface portion 17 of the lid 2 while the lid 2 is rotated up to 90 degrees, and holds the position occupied by the horizontal pivot 9 in a fixed manner. When the lid 2 is excessively rotated beyond 90 degrees, the main body portion 13a of the swing bracket 13 is separated from the supporting surface portion 17 as shown in FIG.

The 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. Further, in the illustrated embodiment, the support surface portion 17 with which the main portion 13a of the swing bracket 13 abuts is formed of an angled member fixed to the end portion of the lid 2, but the bearing portion of the horizontal pivot 15 is displaced downward. If
It can also be constituted by the lower surface of the horizontal rail 18 of the lid 2. Lid 2
At the lower end of the end plate 19 of the
Although the relief notch 20 of 0 is provided, if the support position of the horizontal pivot 15 is changed, such a notch becomes unnecessary.

[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 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 when the temperature exceeds 0 degrees, the lid 2 is 90 degrees with respect to the horizontal plane.
Stand upright every time.

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 moved about 15 degrees from the predetermined angle as shown in FIG. At the time of opening rotation, as shown in FIG.
Rotates downward about a horizontal pivot 15, and with this, the horizontal pivot 9 pivotally attached to the mounting end 8 of the cylinder 7 of the gas damper 6 also moves downward.

Due to the escape rotation of the swing bracket 13 as described above, the gas damper 6 maintains the stretched state at the stage of the open rotation up to the predetermined angle and is not further subjected to the force in the stretching direction.

[Effects of the Invention] As described above, in the gas damper drive type lid opening / closing device of the present invention, the base end portion of the lid 2 is pivotally attached to the fixed frame body 1 by the horizontal pivot shaft 3, and the horizontal pivot shaft is provided on the tip end side of the lid 2. The base end of the swing bracket 13 is pivotally attached by means of 15, and the mounting end 8 of the cylinder 7 of the gas damper 6 is attached to the tip end of the swing bracket 13 on the opposite side of the horizontal pivot 3 with respect to the horizontal pivot 15.
And the mounting end 11 of the rod 10 of the gas damper 6 is attached to the horizontal pivot 1 at a position below the horizontal pivot 3.
Since it is pivotally attached to the fixed bearing body 5 by means of 2, the swing bracket 13 escapes and rotates around the horizontal pivot 15 even if the lid 2 excessively rotates beyond a predetermined angle, so that the gas damper 6 is excessively extended. This prevents the gas damper 6 from being damaged or destroyed.

[Brief description of drawings]

FIG. 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 a front view of the lid opening / closing device in an excessively opened state of the lid. FIG. 3 is a front view of a conventional gas damper drive type lid opening / closing device. 1 ... Fixed frame body, 1a ... end edge surface, 2 ... lid, 2a ...
… Edge edge surface, 3 …… Horizontal axis, 4 …… Mounting board, 5 ……
Fixed bearing body, 6 ... Gas damper, 7 ... Cylinder,
8 ... Mounting end, 9 ... Horizontal pivot, 10 ... Rod, 1
1 ... Attachment end, 12 ... Horizontal pivot, 13 ... Oscillating bracket, 13a ... Main part, 14 ... Bearing tube, 15 ...
... horizontal axis, 16 ... bearing plate, 17 ... supporting surface, 18
...... Horizontal beam, 19 ...... End plate, 20 ...... Notch, 21 ...
... Side wall of opening, 22 ... Fixing bolt

Claims (1)

[Scope of utility model registration request] 1. A base end of a lid 2 is pivotally attached to a fixed frame 1 by a horizontal pivot 3, and a base end of an oscillating bracket 13 is pivotally attached to a tip end of the lid 2 by a horizontal pivot 15. The mounting end 8 of the cylinder 7 of the gas damper 6 is pivotally attached by the horizontal pivot 9 to the tip of the swing bracket 13 on the opposite side of the horizontal pivot 3 with respect to the pivot 15, and the gas damper is positioned below the horizontal pivot 3. A gas damper drive type lid in which a mounting end portion 11 of a rod 10 of 6 is pivotally attached to a fixed bearing body 5 by a horizontal pivot shaft 12, and the lid 2 is rotationally biased in an opening direction by the pressure of gas sealed in the cylinder 7. Switchgear.