JP2013221358A - Opening/closing assistance device of cover body for ditch, and cover structure for ditch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening / closing assisting device for a grooved lid which can be easily attached to an existing lid and can be attached / detached easily and the assisting force can be easily adjusted.
An opening / closing assisting device for a groove lid includes a mounting bracket that is fixed to an inner surface of an opening, a supporting bracket that is detachably supported by the mounting bracket, and a biasing bracket that is supported by the mounting bracket. It comprises. By attaching the support metal fitting 3 to the attachment metal fitting 2 fixed to the side wall W of the opening, the opening / closing assisting device 1 is configured as necessary. When the grating G1 is released, the urging bracket 7 pushes up the grating G1, so that the operating force is reduced. Since the roller 10 rolls on the lower surface of the grating G1 during the opening operation, the operation is performed smoothly. The assisting force of the urging metal 7 is changed by selecting the pin receiving hole 5b in which the locking pin 5a is mounted. Since the support fitting 3 can be inserted into and removed from the pocket portion 2a, it can be attached and detached as needed.
[Selection] Figure 1

Description

  The present invention relates to an assisting device for reducing an operation force when opening and closing a lid body pivotally supported by an opening of a groove such as a side groove, a culvert or a snowfall groove, and a groove using the same It relates to a lid structure.

  The lids of the side grooves, underdrains, and snow drift grooves are made of steel gratings, so they are heavy and are not easy to open and close. For this reason, Patent Document 1 proposes a structure of a groove lid that improves workability when opening and closing the groove lid provided on the ground. This lid structure has a torsion bar that elastically biases the lid covering the opening surface of the groove in a direction to stand up with respect to the groove and supports the lid in a tiltable manner. The torsion bar is disposed at one end of the peripheral edge of the lid, and its one axial end is fixed to the groove side and is pivotally supported with respect to the lid. The other end of the torsion bar in the axial direction is fixed to the lid and pivotally supported with respect to the groove side.

JP-A-9-273167

The conventional lid structure cannot be easily retrofitted to an existing lid. The torsion bar cannot adjust the assisting force individually, is relatively large and expensive, and has a drawback of increasing installation cost.
Therefore, the present invention provides a groove lid body that can be easily retrofitted to an existing lid body with a structure different from that of the above-described conventional one, can be freely attached and detached, and the assisting force can be easily adjusted. An object is to provide an opening / closing assist device.

Hereinafter, the present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.
In order to solve the above-described problems, an opening / closing assisting device 1 for a groove lid according to the present invention includes a mounting bracket 2 fixed to an inner surface of an opening, a support bracket 3 removably supported by the mounting bracket 2, And a biasing fitting 7 to be supported. The mounting bracket 2 is fixed to the inner side surface of the opening located on the pivot G3 side of the lid G1 so as to form an insertion gap S in the vertical direction with the inner side surface. The support fitting 3 includes an insertion plate portion 4 that can be freely inserted into and removed from the insertion gap S, a bracket 5 provided on the upper portion of the insertion plate portion 4, and a support shaft 6 installed on the bracket 5. The urging bracket 7 extends inward from the coil portion 8 on the base end side that is pivotally supported by the support shaft 6, and is in pressure contact with the lower surface of the lid G 1 at the distal end. And a push-up portion 9. The urging bracket 7 is formed by bending one spring steel wire, and a pair of coil portions 8 are formed at both ends so as to surround the support shaft 6, and the push-up portion 9 is extended from the coil portion 8 to the support shaft 6. The arm portion 9a extends in parallel to each other in a direction orthogonal to each other, and a shaft portion 9b that connects between the ends of the arm portion 9a. The bracket 5 of the support metal 3 is provided with a locking pin 5 a that locks the free end of the coil portion 8 of the biasing metal 7.

  In the opening / closing assisting device for a groove lid according to the present invention, it can be easily attached to an existing lid, and can be freely attached and detached as required, so that the assisting force can be easily adjusted. Have.

It is a perspective view of the installation state of the opening / closing assistance apparatus which concerns on this invention. FIG. 2 is a perspective view of the open / close assist device of FIG. 1 in a separated state. FIG. 2 is a front view of the opening / closing assisting device of FIG. FIG. 2 is a plan view of the opening / closing assisting device of FIG. FIG. 2 is a side view of the opening / closing assisting device of FIG. 1.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5, the opening / closing assisting device 1 is a grating that is attached to a side wall W of an opening of a groove such as a side groove and pivotally mounted on a receiving frame G <b> 2 installed in the opening so as to be openable and closable. It assists the opening / closing operation of G1. The opening / closing assisting device 1 is a lower part of the receiving frame G2 and is attached to the inner wall surface of the grating G1 on the hinge G3 side, and the support metal fitting 3 that is positioned below the grating G1 and is attached to the attachment metal fitting 2 And an urging bracket 7 supported by the same.

  The mounting bracket 2 is made of a steel plate material, and has fixing portions 2b and 2b for bolting to the side wall W at both ends, and has a pocket portion 2a that rises from this and forms a gap S between the wall surface.

  The support bracket 3 includes an insertion plate portion 4 that can be inserted into the pocket portion 2a of the mounting bracket 2 from above, a bracket 5 that refracts perpendicularly from the left and right of the upper portion of the insertion plate portion 4 and protrudes forward, and the bracket 5 And a support shaft 6 supported horizontally. The support shaft 6 is disposed in parallel with the pivot G3 of the grating G1 and is fixed with a bolt 11. If the bolt 11 is loosened and the support shaft 6 is removed, the urging bracket 7 can be replaced.

  The urging bracket 7 has a pair of proximal end side coil portions 8 and a push-up portion 9 extending between the coil portions 8 and 8 in the orthogonal direction. That is, the urging bracket 7 is formed by bending one spring steel wire, and a pair of coil portions 8 are formed at both ends so as to surround the support shaft 6. The push-up portion 9 extends from the coil portion 8 inward of the opening, and is pressed upward against the lower surface of the grating G1 at the tip portion. The push-up part 9 includes an arm part 9a and a shaft part 9b. The arm portions 9 a extend from the coil portion 8 in parallel to each other in a direction orthogonal to the support shaft 6. That is, the arm portion 9a linearly extends from the coil portion 8 in a direction gradually separating from the lower surface of the grating G1, and linearly extends in a direction gradually approaching the lower surface of the grating G1 again through the refracting portion. . The shaft portion 9b connects between the ends of the arm portion 9a, and the roller 10 is mounted on the shaft portion 9b.

  The free end of the coil portion 8 of the urging metal member 7 is engaged with an engagement pin 5a installed between the brackets 5 and 5 of the support member. Two pin receiving holes 5b are formed in the bracket 5 at different angular positions around the support shaft 6, and a locking pin 5a is selectively installed in one of the pin receiving holes 5b. Depending on which pin receiving hole 5b supports the locking pin 5a, the urging force of the coil portion 8 locked to this can be selected.

  The urging bracket 7 can be provided so as to be in a natural state when the grating G1 is in the standing state shown in FIG. 1, but is not limited thereto. In this way, when the grating G1 rises and is free, it is locked in a closed state.

  By inserting the insertion plate portion 4 of the support metal fitting 3 into the pocket portion 2a of the attachment metal fitting 2 fixed to the side wall W of the opening in advance, the opening / closing assisting device 1 can be configured as necessary. When the grating G1 is released, the urging bracket 7 pushes up the grating G1, so that the operating force is reduced. With the opening operation of the grating G1, the roller 10 rolls on the lower surface of the vertical rail of the grating G1, so that the sliding resistance is small and the opening is smoothly performed. The assisting force of the urging bracket 7 can be changed by selecting the pin receiving hole 5b to which the locking pin 5a is attached, for example, according to the weight of the grating G1. Since the support fitting 3 can be inserted into and removed from the pocket portion 2a, it can be attached and detached as needed.

DESCRIPTION OF SYMBOLS 1 Opening and closing assistance apparatus 2 Mounting metal fitting 2a Pocket part 2b Fixing part 3 Support metal fitting 4 Insertion board part 5 Bracket 5a Locking pin 5b Pin receiving hole 6 Support shaft 7 Energizing metal fitting 8 Coil part 9 Push-up part 9a Arm part 10 Roller 11 Bolt G1 grating (lid)
G2 receiving frame G3 Axis

Claims (5)

An assisting device for reducing the opening / closing operation force of the lid pivotally supported by the opening in order to open / close the opening of a groove such as a side groove, a culvert, and a snow drift groove,
A mounting bracket fixed to the inner side surface of the opening located on the pivot side of the lid body so as to form a vertical insertion gap with the inner side surface;
A support fitting comprising: an insertion plate portion that can be freely inserted into and removed from the insertion gap; a bracket provided at an upper portion of the insertion plate portion; and a support shaft laid on the bracket;
An urging metal fitting having a proximal end side coil portion pivotally supported by the support shaft and a push-up portion extending inwardly from the coil portion and in pressure contact with the lower surface of the lid at the distal end portion. And
The urging metal fitting is formed by bending one spring steel wire, the coil part is formed in a pair at both ends so as to surround the support shaft, and the push-up part is orthogonal to the support shaft from the coil part. An arm portion extending parallel to each other in the direction to be connected, and a shaft portion connecting between the tips of the arm portion,
An opening / closing assisting device for a groove lid, wherein a bracket pin for locking a free end of a coil portion of the biasing metal fitting is provided on the bracket of the support metal fitting.   2. The opening / closing assisting device for a groove lid according to claim 1, wherein a roller capable of rolling the lower surface of the lid is supported on the shaft portion of the biasing metal fitting.   3. The groove lid according to claim 1, wherein the locking pin of the support fitting is provided on the bracket so that the position thereof can be changed in order to change the assisting force of the biasing fitting. Open / close assist device.   The arm portion of the urging bracket linearly extends from the coil portion in a direction gradually separating from the lower surface of the lid body, and linearly extends in a direction gradually approaching the lower surface of the lid body again via the refracting portion. The opening / closing assisting device for a groove lid according to any one of claims 1 to 3, wherein the device is provided.   5. The opening / closing assist device for a groove lid according to claim 1, wherein the urging metal fitting is provided so as to be in a natural state when the lid is in an upright state. Groove lid structure.

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