JPH08121U - Locking device for manhole iron cover - Google Patents

Abstract

(57) [Abstract] [Purpose] Manufacturing and assembling process of the weight by integrally forming the key part, the cylindrical member for inserting the burl and the vertical groove on the weight suspended by the spindle on the iron lid 5. To make it easy. The leg portion of the lid fitted in the U-shaped keyhole of the iron lid is inserted into the tubular member of the weight, and the iron lid 5 and the weight 7 are inserted.
And the receiving frame 1 are securely locked to prevent rainwater from entering the manhole. [Structure] An L-shaped hook 3 that engages with the key portions 14 and 14 'of the weight 7 is provided inside the receiving frame 1. The iron lid 5 is formed with a U-shaped keyhole 6 into which the lid 20 is fitted and an upper edge 6a. The weight 7 is suspended by the support shaft 15 on the support portion 16 on the back side of the iron lid 5. A cylindrical member 13, a vertical groove 9 and key portions 14 and 14 ′ that are locked and released to the L-shaped hook 3 of the receiving frame 1 are provided integrally with the weight 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the conventional iron lid locking device, the weight and the key are separate structures, and the number of members is large. Therefore, when the iron lid is opened by using the burr, the working direction of the burl does not match the working direction of the weight, and the structure is complicated, so dust may be present between the members, or the frame may be rusted or corroded. The key of the weight that engages with the hook on the hook may not work properly because of improper operation. Similarly, when closing the iron lid, the key of the weight collides with the hook of the receiving frame, which may prevent the lid from being quickly closed. Since the iron lid is a heavy item, it is necessary to open and close the iron lid smoothly.

[0002]

[Prior art]

 When the iron lid was locked on the receiving frame, the keyhole was closed to prevent rainwater and dust from entering the manhole through the keyhole. As a result, there was a gap between the keyhole and the lid, and it was not possible to reliably prevent rainwater from entering the manhole.

[0003]

[Problems to be solved by the device]

 The present invention eliminates the above-mentioned drawbacks, and the rotation of the weight rotatably suspended on the iron lid by the mandrel is made to coincide with the rotation of the burl, and the key portion of the weight is disengaged from the L-shaped hook of the receiving frame. At the same time, a separate lid is hermetically fitted into the keyhole of the iron lid to prevent rainwater from entering the manhole, and this lid is removed and the burl is inserted into the tubular member integrated with the weight. The T-shaped projection at the tip of the burl is locked to the diametrical bottom edge of the burl insertion hole so that the rolling direction of the burl matches the rolling direction of the weight, and the hook of the receiving frame and the key of the weight are locked. It is an object of the present invention to provide a lock device for an iron lid, which can be engaged and disengaged smoothly and quickly, which simplifies the assembly member, facilitates the production and assembly, and can reduce the cost.

[0004]

[Means for Solving the Problems]

 The present invention is: (a) A lock of an iron lid that fits an outer circumferential surface of an iron lid 5 on an inner circumferential surface of the receiving frame 1 and has one side hinged to each other with a hinge metal fitting to open and close the opening of the receiving frame 1. In the device, (b) the receiving frame 1 in which the L-shaped hooks 3 engaging with the key portions 14 and 14 'of the weight 7 project from inside the outer end, and (c) the weight 7 is supported on the back side support portion 16. An iron lid 5 having a U-shaped keyhole 6 suspended by a shaft 15 and sealed with a lid 20 above the L-shaped hook 3 on the other side, and (d) vertical groove 9 and vertical groove 9 A cylindrical member 13 having an insertion hole 11 for a burl 10 communicating with the key 7 and a weight 7 integrally formed with key portions 14 and 14 'engaged with the L-shaped hook 3 of the receiving frame 1, and (e) an iron lid 5, a lid 20 having a shaft 23 inserted into the upper edge 6a of the U-shaped keyhole 6 and the tubular member 13 of the weight 7, and (f) a bar having a T-shaped protrusion 12 at the tip. 10, a locking device for a manhole iron lid, characterized in that more becomes.

[0005]

[Action]

 If the receiving frame and the iron lid are hinged to each other with hinge fittings (not shown) on one side, to open the iron lid from the receiving frame, the shaft of the lid should be attached to the cylindrical member of the weight and the iron lid. Pull out through the U-shaped keyhole. Insert the burl from the upper edge of the U-shaped keyhole into the insertion hole and the vertical groove of the tubular member, turn the burl to one side, and place the T-shaped protrusion at the tip of the burr on the lower edge of the tubular member. It is hooked in the diametrical direction, and the tip of the T-shaped protrusion is locked to the engaging portion protruding from the front surface of the weight. When the burl is tilted toward the opening of the U-shaped keyhole with the upper edge of the receiving frame as the fulcrum, the outer peripheral edge of the iron lid separates from the inner peripheral edge of the receiving frame. Now, if you pull the burl upwards, the iron lid can be further separated from the receiving frame along with the weight and the manhole can be opened at the end. When closing the iron lid, the iron lid is fitted to the receiving frame while the burl is hooked on the tubular member. After fitting, rotate the burr to the other side to fit the T-shaped protrusion of the burl into the vertical groove, and pull out the burl from the tubular member and the U-shaped keyhole. Then, due to the gravity of the weight, the weight rotates to one side and acts so as to align the axial direction of the tubular member with the axial direction of the U-shaped keyhole, so that the key portion engages with the L-shaped hook of the receiving frame. To lock. Next, the lid is inserted into the U-shaped key hole, and the tip end thereof is fitted into the hole of the cylindrical member so that the key member does not move.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a state in which a receiving frame and an iron lid are assembled and a U-shaped key hole for inserting a bar of the iron lid is partially cut away, and FIG. 2 is a weight and a bar. And FIG. 3 is an assembly explanatory diagram of the iron lid, the lid, and the weight. Reference numeral 1 denotes a manhole receiving frame (hereinafter referred to as a receiving frame), and the inner peripheral surface of the upper end opening is an inclined inner peripheral surface 2 for joining with the outer peripheral surface of the iron lid 5. Further, an L-shaped hook 3 is provided so as to project inside the middle portion of the receiving frame 1, and a pocket portion 4 for engaging the key portions 14 and 14 'of the weight 7 is formed inside the L-shaped hook 3. Reference numeral 5 denotes an iron lid fitted to the receiving frame 1, and an outer peripheral inclined surface 5b thereof is fitted to the inclined inner peripheral surface 2 of the receiving frame 1.

Reference numeral 7 denotes a weight, which is suspended by a support shaft 15 on a support portion 16 on the back side of the iron lid 5, and is formed in a J shape when viewed from the side. A U-shaped vertical groove 9 is provided on the front rising surface portion 8 of the weight 7. Reference numeral 5 denotes an iron lid, and a U-shaped keyhole 6 having a U-shaped upper edge 6a cut out in a U-shape when viewed from above is formed in a part of the upper surface 5a and the outer peripheral inclined surface 5b of the iron lid 5. The lid 20 corresponding to the U-shaped keyhole 6 has a U-shaped top plate 21 fitted to the upper edge 6a, a small step edge 22 and a tube communicating with the vertical groove 9 and the corner edge 12 of the weight 7. A rod-shaped portion 23 having a split groove 24 is integrally formed at a tip end portion thereof fitted into the insertion hole 11 of the strip-shaped member 13. The lid 20 fits the iron lid 5 on the receiving frame 1 and closes the manhole to fit the lid 20 on the U-shaped keyhole 6 to prevent rainwater from entering the manhole. Further, when opening the manhole, the lid 20 is pulled out from the U-shaped keyhole 6, and the inside of the U-shaped keyhole 6 and the cylindrical member 13 of the weight 7 and the vertical groove 9 and the tip of the burl 10 and the T-shape. Even if the T-shaped projection 12 is inserted through the projection 12 and is diametrically locked to the engaging portion 13a ′ projecting from the front surface 13a of the weight 7, the weight 10 can be tilted forward. The burr 10 can be pulled and the iron cover 5 can be opened while holding the brace 7 so as not to bend forward.

[0008]

[Effect of device]

 As described above, according to the present invention, the vertical groove, the tubular member, and the key portion are integrally formed on the weight, so that the number of parts can be significantly reduced and the manufacturing cost can be reduced. In addition, the key part of the weight is secured to the L-shaped hook of the receiving frame by inserting the tip part of the lid fitted to the upper edge of the U-shaped key hole of the iron cover into the insertion hole of the cylindrical member of the weight. The iron lid and the weight can be locked to the receiving frame by engaging with. Also, by providing the T-shaped projection at the tip of the burl, the burl can be easily inserted into the cylindrical member of the weight and the vertical groove, and the through hole and the vertical groove of the cylindrical member of the weight can be inserted. Rotate the inserted burl about 90 ° to engage the T-shaped protrusion with the engagement part of the front part of the weight in the diameter direction, and pull up the burl to easily remove the bite part between the receiving frame and the iron lid. It is possible to prevent the weight from burring, and further pull up the bar to raise the iron lid to open the hole of the receiving frame, which facilitates the opening and closing operation of the iron lid and the lid 20 Since the burr insertion hole is sealed, it has an excellent effect that rainwater can be surely prevented from entering the manhole through the U-shaped key hole of the iron lid.

[Brief description of drawings]

FIG. 1 is a side view in which an iron lid is applied to a receiving frame, and a part of a state where the lid is fitted in a groove of the iron lid is cut away.

FIG. 2 is an exploded explanatory view of a weight and a burl.

FIG. 3 is an exploded explanatory view of an iron lid, a lid, and a weight.

[Explanation of symbols]

 1 Receiving frame 2 Inclined inner peripheral surface of receiving frame 3 L-shaped hook of receiving frame 4 Feet part 5 Iron lid 5a Upper surface of iron lid 6 U-shaped keyhole of iron lid 6a Upper edge of U-shaped keyhole 7 Weight 8 Weight Front rising part 9 Vertical groove of weight 10 bar 11 Bar insertion hole 12 T-shaped protrusion of 13 bar 13 Cylindrical member of weight 13a Front part of weight 13a 'Front part of weight 14, 14' Key Part 15 Spindle 16 Support part of iron lid 20 Lid

Claims (1)

[Scope of utility model registration request] 1. An iron lid for opening and closing an opening of the receiving frame 1 wherein (a) an outer peripheral surface of an iron lid 5 is fitted to an inner peripheral surface of the receiving frame 1 and one side portions thereof are hinged to each other by a hinge metal fitting. In the locking device,
(B) The receiving frame 1 in which the L-shaped hooks 3 that engage with the key portions 14, 14 'of the weight 7 are provided on the inside of the outer ends, and (c) the weight 7 is supported by the support shaft 15 on the back side support portion 16. U that is hung and sealed with a lid 20 above the L-shaped hook 3 on the other side
A cylindrical member 13 having an iron lid 5 having a keyhole 6 formed therein, and (d) a vertical groove 9 and an insertion hole 11 for a burl 10 communicating with the vertical groove 9.
And key portions 14 and 14 'to be engaged with the L-shaped hook 3 of the receiving frame 1
And (e) a lid 20 having a shaft 23 fitted into the upper edge 6a of the U-shaped keyhole 6 of the iron lid 5 and the tubular member 13 of the weight 7. f) T-shaped protrusion 1 at the tip
A locking device for a manhole iron lid, comprising: a burl 10 having 2;