JPH0561238U - Iron lid jump-out prevention device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a device for preventing the iron cap from jumping out, which does not jump open when a vehicle passes over the iron cover and can be easily opened in an emergency. [Structure] The edge of the iron lid 1 and the receiving frame 2 are connected by a hinge hardware 3, and a notch 20 for inserting a bar or the like is formed on the edge of the iron lid opposite to the hinge hardware to close the iron lid. In the state of the lid, the protrusion 22 is provided on the inner surface of the receiving frame below the cutout portion, and the surface of the iron lid slightly distant from the edge portion with the cutout portion to the edge portion with the hinge is floated on both sides facing each other. The metal fitting support recess 21 is provided, and the head 14 is located in the notch with the iron lid closed, and the neck 15 following the head extends downward between the support recesses to reach the weight 16 and reach its weight. Two arm portions 17 separated from each other by a burl insertion interval extend upward, and shaft portions 18 project outwardly in opposite directions to the upper ends of the respective arm portions and are loosely fitted in the support recesses to be supported and supported by the weight portion. Provided is the anti-floating metal fitting 4 having a structure in which the hook portion 19 is projected and reaches the lower side of the projection.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for preventing the opening or opening of an iron lid with respect to the opening of an installation portion such as a fire hydrant installed under the ground.

[0002]

[Prior Art]

 For iron lids that need to be opened urgently, a flat bearing structure is used to facilitate opening, but rattling often occurs due to deformation or uneven wear of the lid. When rattling began to occur, the iron lid sometimes jumped out of the receiving frame when the vehicle passed. In order to prevent the iron lid from jumping out of the receiving frame, a lid opening prevention structure or a lid locking structure is adopted.

As conventional devices of this type, there are those disclosed in Japanese Utility Model Publication No. 58-3891 and Japanese Utility Model Publication No. 62-159560. In the former, a hole closing valve plate is placed below the hole in the lid, the valve plate is pivotally supported on the back surface of the lid, and the pivot point is movable, so that the valve plate is closed with a predetermined pushing force. It is equipped with a normally closed mechanism. The normally closed mechanism presses the valve plate in the valve closing direction by the weight of the weight and the elasticity of the spring. The valve plate and the rotating shaft that constitutes the pivot point are connected by a single linear arm. A weight is provided below the rotary shaft, and a hook is projected from the weight, and the hook engages with a horizontal projection plate provided on the receiving frame of the lid in a closed state to prevent the lid from opening. Has become. When opening the lid, the valve plate that closes the hole is pushed down with a burl to open it, and the rotary shaft is moved, before opening the lid.

The latter has a structure in which a lock is swingably attached to the lower surface of the lid, and a locking projection is provided on the inner circumference of a receiving frame on which the lid is placed to enable locking. A burr hole is provided on the upper side of the rocking shaft of the lock, and the hole is closed from the lower side with a lid that is integrated with the rocking shaft. It is used by inserting it into the burl hole and rotating it to drive the slope and unlock it, and then open the lid. A hinge connecting the lid and the receiving frame is provided on the opposite side of the lock.

[0005]

[Problems to be solved by the device]

 Each of the conventional iron lids having the lid opening prevention structure or the locking structure has a problem that it cannot necessarily easily cope with an urgent opening. For example, in the case of a fire hydrant installed in the ground and closed with an iron lid, the fire hydrant cannot fulfill its role unless the lid can be easily opened. In the former case described in the above publication, when the lid is opened, the valve plate is opened and then the lid is opened. However, there is a problem that the operation of opening the lid cannot be smoothly performed following the operation of opening the valve plate. In other words, it is not possible to operate the burl as it is while the valve plate is pushed down by the burl to bring the lid completely open.

The latter described in the above publication can be opened completely as it is after unlocking, but there is a problem in that the lid cannot be opened unless a burr having a special tip shape is used.

The present invention provides an iron lid jump-out prevention device that does not bounce and open the lid when a vehicle passes over an iron lid provided on a road surface and can be easily opened in an emergency. The purpose is to provide.

[0008]

[Means for Solving the Problems]

 The device for preventing the iron lid from jumping out according to the present invention connects the edge portion of the iron lid and the receiving frame with a hinge metal, and a notch for inserting a bar or the like on the edge of the iron lid opposite to the hinge hardware. A protrusion is formed on the inner surface of the receiving frame below the notch in the state where the iron lid is closed, and it is slightly separated from the edge with the notch to the edge with the hinge. Both sides of the iron lid are provided with anti-floating metal fitting support recesses on opposite sides, and when the iron lid is closed, the head is located in the notch and the neck follows the head and is between the support recesses. 2 arms extending downwards to reach the weight, and two arms spaced apart from the weight with a burl insertion interval extend upwards, and the shafts project outward in opposite directions at the upper ends of the arms, and the support recesses are formed. A structure in which a hook portion projects from the weight portion and reaches the lower side of the protrusion portion by being loosely fitted and supported in a place Characterized in that a floating prevention fitting.

[0009]

[Action]

 In the closed state, one edge of the iron lid is constrained to the receiving frame side by the engagement of the shaft of the anti-floating metal fitting with the support recess and the engagement of the hook and the projection, and the other edge by the hinge. It is restrained to the frame side, and the jumping out due to the passage of the vehicle is prevented. To open the iron lid, insert the tip of the burr into the notch for inserting the burr by pushing down the head of the anti-floating metal fitting, and then insert the tip of the burr into the back of the iron lid. When the head is lowered, the anti-floating metal fitting rotates around the shaft and the hook part comes off the protruding part of the receiving frame. Enter between the back and the head and between the two arms. At this time, the burl comes into contact with the inner part of the notch and the edge of the receiving frame and pushes them apart to enter. The tip of the burr reaches the upper side of the weight in a state where it is fully approached, and when the burl is rotated in the opening direction of the iron lid, the burr will move toward the tip side with the back of the notch of the iron lid as the fulcrum. When the burr is rotated and comes into contact with the weight and the burl is further rotated, the anti-floating metal fitting tries to rotate around the shaft as a fulcrum, but the head comes into contact with the burl and further rotation is impossible. Therefore, the burl and the iron lid are engaged with each other at a certain angle, and when the burl is further rotated, the burl is rotated together with the iron lid to be in the open state.

[0010]

【Example】

 An embodiment of this invention will be described with reference to the drawings. 1 to 3 show an iron lid for a fire hydrant together with a receiving frame, 1 is an iron lid, 2 is a receiving frame, 3 is a hinge, and 4 is a floating preventing metal fitting.

The iron lid 1 and the receiving frame 2 are formed in a rectangular shape, and two hinges 3 are provided on one of the long sides of the iron lid 1 and the floating prevention fitting 4 is provided on the other side.

The hinge 3 connects the iron lid 1 and the receiving frame 2, has a rotating shaft 10 at the upper end, as seen in FIGS. 1 and 3, and is bent and extended downward. It has an enlarged portion 11 and a retaining portion 12 at the lower end. The rotating shaft 10 is rotatably supported by an iron lid, and the hinge 3 is rotatable by at least 180 °. The enlarged portion 11 is formed on the lower side of the hinge engagement portion 13 provided on the receiving frame. When the iron lid is displaced so that the iron lid floats right above, the hinge 3 engages with the hinge engagement portion 13 and the enlarged portion 11 locks the iron lid 1 so that the hinge 3 can be slightly displaced upward. Further, when the iron lid 1 is slanted upward and is displaced upward, the enlarged portion 11 passes through the hinge engaging portion 13 and the stopper 12 engages with the hinge engaging portion 13, and in this state. The iron lid 1 can be flipped 180 ° around the hinge 3.

The floating prevention fitting 4 has a shape as shown in FIG. 4 and is provided as shown in FIGS. As shown in FIG. 4, the anti-floating metal member 4 includes a head portion 14, a neck portion 15, a weight portion 16, arm portions 17 and 17, shaft portions 18 and 18, and a hook portion 19.

On the iron lid 1 side, a notch 20 for inserting a bar or the like is provided at an intermediate position of the long side, and the edge part having the notch part 20 is slightly moved to the edge part side having the hinge 3. Supporting recesses 21, 21 for the anti-floating metal fitting 4 facing each other on both sides are provided on the back surface of the distant iron lid 1. On the receiving frame 2 side, a projecting portion 22 is provided on the inner surface of the receiving frame 2 below the notch 20 in the closed state of the iron lid 1.

The respective parts forming the floating prevention fitting 4 have the following positional relationships. With the iron lid 1 closed, the head portion 14 is located in the cutout portion 20, and subsequently to the head portion 14, the neck portion 15 extends downward between the support recesses 21, 21 to reach the weight portion 16. , Two arm portions 17 and 17 spaced apart from the weight portion 16 by a burl insertion interval e extend upward, and shaft portions 18 and 18 are outwardly directed in opposite directions to the upper ends of the arm portions 17 and 17, respectively. The hook 19 is projected from the weight 16 and reaches the lower side of the protrusion 22. The loose fitting state of the shaft portion 18 in the support recess 21 has a margin such that the shaft portion 18 can be displaced by about its own diameter. In the assembly, the insertion opening is formed in a groove shape so that the shaft portions 18, 18 can be inserted from the cutout portion 20 side, and after the insertion, the insertion opening is closed by the set screws 23, 23. As a result, the shafts 18, 18 are always held in the support recesses 21, 21, respectively. Further, as shown in FIG. 1, the head portion inside the notch portion 20 is rounded so that there is a slight gap between the head portion and the inner portion of the notch portion 20. This is to make it easier to insert a burl or the like.

With the iron lid jump-out prevention device thus configured, in the closed state shown in FIG. 1, even if a situation occurs in which the vehicle passes above it and the iron lid 1 floats up, the hinge is prevented. On the 3 side, the enlarged portion 11 engages with the hinge engaging portion 13 and slightly rises, but does not rise further, and on the side of the anti-floating metal fitting 4, its hook portion 19 is below the protruding portion 22. When it is located on the side, the hook 19 engages with the projection 22 when it is slightly lifted and does not lift further, so that the iron lid 1 does not jump out from the receiving frame 2. If the iron lid 1 is lifted by some reason other than the passage of the vehicle, both the hinge 3 side and the anti-floating metal fitting 4 side will be lifted at the same time, as shown in Fig. 5. Is locked on the side of.

For the operation of opening the iron lid 1, a hook-shaped portion or a large flat-blade screwdriver-shaped portion attached to a normal bar or a handle for opening and closing a fire hydrant is used. The tip portion of such a burl is inserted into the cutout portion 20 on the lower side while pushing down the head portion 14. At this time, if the resistance increases at the stage of inserting it a little, if you push it in while rotating the bar up and down, the iron cover 1 will move in the opening direction and the state shown in Fig. 6 will be obtained. it can. At this stage, the hook portion 19 is separated from the protruding portion 22. When the burl or the like has a hook shape as shown in FIG. 6, it can be pulled up in the direction of the lid as it is. However, in the case of a bar, it cannot be pulled up, so if the iron cover 1 is rotated further in the opening direction after being pushed further inwards, the bar and the iron cover 1 will rotate together to open the cover. You can Of course, a hook-shaped object may be pushed in sufficiently and then similarly operated. At this time, the tip of the burl or the like has reached a position between the arm portions 17, 17 or a position passing through the arm portions 17, and as shown in FIG. Is in contact with the lower side, and the lower edge of the inner part of the cutout portion 20 is in contact with the upper side, and moves in a fixed relationship with respect to the rotation in the direction of the arrow such as a burl. To open the lid, all you have to do is push in the burls enough to move the iron lid in the opening direction.

When the lid-opened state is changed to the lid-closed state, the anti-floating metal fitting 4 is automatically rotated by being caught by the protrusion 22, and then the hook portion 19 is placed below the hook due to the position of the center of gravity. It enters the side and enters the floating prevention state shown in FIG.

Although the above embodiment shows the iron lid for the fire hydrant, the configuration using the floating prevention fitting 4 of the embodiment can be applied to other iron lids. Further, the hinge 3 does not necessarily have to be the one shown in the embodiment, but may be any one having a hinge function.

[0020]

[Effect of the device]

 According to this invention, when the vehicle passes over the iron lid provided on the road surface, etc., the lid does not bounce and open, and the iron lid can be easily opened in an emergency. A device can be provided.

[Brief description of drawings]

1 is a sectional view taken along the line AA of FIG. 2 showing an embodiment of the present invention.

FIG. 2 is a plan view of the same embodiment.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a view showing a floating prevention fitting of the embodiment, (a) is a front view, (b) is a right side view, and (c) is a plan view.

FIG. 5 is a cross-sectional view corresponding to FIG. 1 in a state where the iron lid of the embodiment is lifted.

FIG. 6 is an enlarged cross-sectional view of a main part showing a state in which the iron cover is being opened according to the embodiment.

FIG. 7 is a cross-sectional view corresponding to FIG. 1 in the half-opened state of the iron lid of the same embodiment.

[Explanation of symbols]

 1 Iron Lid 2 Receiving Frame 3 Hinge 4 Floating Prevention Metal Fitting 14 Head 15 Neck 16 Weight 17 Arm 18 Shaft 19 Hook 20 Notch 21 Support Recess 22 Projection

Claims (1)

[Scope of utility model registration request] 1. An iron lid closing lid is formed by connecting an edge of an iron lid and a receiving frame with a hinge hardware, and forming a notch for inserting a bar or the like on an edge of the iron lid opposite to the hinge hardware. In this state, a protrusion is provided on the inner surface of the receiving frame below the notch,
The anti-floating metal fitting support recesses are provided on both sides of the back surface of the iron lid, which are slightly distant from the edge portion having the cutout portion toward the edge portion having the hinge, and the cutting is performed in the state where the iron lid is closed. The head is located in the notch, and the neck extends following the head downward between the support recesses to reach the weight, and the two arms extending from the weight with the burl insertion interval extend upward. Further, the shaft portions project outward in opposite directions to the upper ends of the respective arm portions, are loosely fitted and supported in the support recesses, and the hook portions project from the weight portions to reach the lower side of the projection portions. An anti-jumping device for the iron lid, which is equipped with a floating prevention metal fitting.