KR102576322B1 - Locking device of manhole cover - Google Patents

Abstract

In the present invention, in constructing a locking device for a manhole cover, locking sockets are installed at equal intervals on three inner bottom surfaces of the manhole cover, and locking sockets are installed in the locking sockets to provide locking and noise prevention functions for the manhole as well as manhole locking. Not only does it make it easy to open the cover, but it also simplifies the locking mechanism into a single piece, making it easy to manufacture and assemble, and making it possible to expect accuracy in opening and closing operations.
As a means to solve the above problem, the present invention is a locking socket in which a lock socket with a circular storage compartment is formed at three locations on the inner bottom of the manhole cover, and a circular rod body and a locking piece are integrated into the circular storage compartment of the lock socket. The sphere is elastically installed with a spring so that it can move a certain distance, but the spring can be easily elastically installed in the locking sphere through a through hole in the manhole cover plate.

Description

Locking device of manhole cover {LOCKING DEVICE OF MANHOLE COVER}

The present invention relates to a locking device for a manhole cover. In detail, locking devices are installed at three locations on the bottom of the manhole cover at equal intervals to provide locking and noise prevention functions for the manhole as well as to facilitate opening of the manhole cover. The structure of the locking device is It has been simplified so that manufacturing and assembly can be easily performed.

In general, manholes are assembled with a manhole cover and a manhole support, and are mainly installed on sidewalks or roads for maintenance, repair, and management of underground facilities.

Manholes installed on sidewalks or roads may be equipped with a locking means on the manhole cover for access control, noise prevention, and safety accident prevention due to opening or leaving the manhole cover.

Reviewing the prior art regarding manholes equipped with locking means, Patent No. 10-1238164, “Manhole with manhole cover locking function” (Patent Document 1), and Patent No. 10-1927198, “Manhole with locking device so that it is securely engaged” A “manhole cover assembly with a locking groove” (Patent Document 2) has been proposed.

Reviewing the technical content of Patent Document 1, it relates to a manhole having a manhole cover locking function, and more specifically, a lid frame and bottom in which a locking protrusion is formed along the inner periphery and an annular fastening groove is formed in the inner periphery. An operating chamber having a transfer space in the upper part is formed to face each other, a manhole cover having a fastening hole formed on the edge of the upper surface to communicate with the transport space, a guide shaft part whose one end is fixed to one side of the operating chamber, and the guide shaft part. It consists of an elastic spring inserted into the operating chamber and a transfer unit guided to the guide shaft and moved by the elasticity of the elastic spring, so that it does not shake even when a vehicle traveling at high speed passes the manhole cover, thereby reducing traffic noise. In addition to preventing safety accidents, it is also effective in preventing internal odors and gases from being discharged to the outside through gaps.

In the case of Patent Document 1, the locking means formed on the bottom of the manhole cover is formed symmetrically on both sides, and when a vehicle drives over the manhole cover, not only is there a risk of shaking around the symmetrically configured locking means, but the locking means There is some difficulty in assembling.

Reviewing the technical content of Patent Document 2, it relates to a manhole cover assembly coupled by the hinge protrusion of the manhole cover and the hinge groove of the manhole support, comprising a slide portion that maintains elasticity along the circumference on the inside of the bottom portion, and the slide portion A manhole cover provided with a plurality of locking devices having protrusions formed outwardly at the ends of the; It includes a manhole support configured to prevent the closed manhole cover from being easily opened by the locking device, wherein the manhole support includes a hinge groove in which a hinge pin is formed so that the manhole cover is hinged, and the protrusion is elastically positioned on the inside. It consists of a locking groove formed to be in close contact with the locking groove, and the locking groove is connected to the inner and lower edges of the manhole support and has a concrete bump installed to prevent the concrete being constructed from penetrating. The locking device is secure. It relates to a manhole cover assembly in which a locking groove is formed so as to be caught.

In the case of Patent Document 2, three slide parts with protrusions formed on the bottom of the manhole cover are integrally cast, and when locked, the three protrusions are locked with the locking means of the manhole support, thereby providing stable locking and preventing shaking. Although it is said to be effective, there is a disadvantage in that if it is kept in the locked state for a long time, the elasticity of the ductile iron bar is lost, making it impossible to engage smoothly.

As a means to solve these shortcomings, the present inventor has registered Patent No. 10-2263386, “Locking tool for locking a manhole cover” (Patent Document 3).

Reviewing the technical content of Patent Document 3, in constructing the manhole cover lock, the lock is separated into a fixture and a lock, and the fixture forms a circular shaft hole in the main body, and a It constitutes a mouth groove, and the locking member constitutes a circular shaft with a guide piece formed on the back of the locking member. The shaft of the locking member is inserted into the shaft hole of the fixture so that the guide piece of the shaft is inserted into the concave groove of the shaft hole. The width is wider than the width of the guide piece of the shaft rod, so that the shaft rod between the locks rotates left and right around the shaft hole of the fixture.

Therefore, locks are installed at equal intervals in three places on the inner bottom of the manhole cover to lock the manhole and prevent noise. In particular, when the lock is installed on the inner bottom of the manhole cover, if one side is lifted to open the manhole cover, the other side is locked. There is an advantage in that the locking mechanism located in two places can be rotated left and right, making it easy to open and close the manhole cover.

However, the locking device used in the locking means of the manhole cover is composed of a fixture and a locking section separately, and the locking device is assembled within the fixture so that it can rotate left and right at a certain angle to form a locking device, and the locking device is connected to the locking socket. Since it had to be assembled in the lock, there were inconveniences in manufacturing and assembling the lock.

Patent No. 10-1238164 “Manhole with manhole cover locking function” Patent No. 10-1927198 "Manhole cover assembly with a locking groove so that the lock is safely engaged." Patent No. 10-2263386 “Lock for manhole cover locking”

In the present invention, in constructing a locking device for a manhole cover, locking sockets are installed at equal intervals on three inner bottom surfaces of the manhole cover, and locking sockets are installed in the locking sockets to provide locking and noise prevention functions for the manhole as well as manhole locking. Not only does it make it easy to open the cover, but it also simplifies the locking mechanism into a single piece, making it easy to manufacture and assemble, and making it possible to expect accuracy in opening and closing operations.

As a means to solve the above problem, the present invention is a locking system in which a locking socket with a circular storage compartment is formed at three locations on the inner bottom of a manhole cover, and a circular rod and a locking piece are integrated into the circular storage compartment of the locking socket. The sphere is elastically installed with a spring so that it can move a certain distance, but the spring can be easily elastically installed in the locking sphere through a through hole in the manhole cover plate.

The present invention is an integrated locking socket with a circular storage compartment formed on three inner bottom surfaces of the manhole cover, and the locking socket, which is composed of a circular rod and a locking piece integrated into the circular storage compartment of the locking socket, can be moved a certain distance by a spring. It is elastically installed, but by allowing the spring to be easily elastically installed in the lock through the through hole in the manhole cover plate, not only does it provide locking and noise prevention functions for the manhole, but it also facilitates the opening of the manhole cover, as well as the configuration of the lock. By simplifying it into a single piece, it is easy to manufacture and assemble, and the accuracy of the opening and closing operation can be expected.

Figure 1: Perspective view of a manhole with a locking device of the present invention installed
Figure 2: exploded perspective view of Figure 1
Figure 3: Bottom perspective view of Figure 1
Figure 4: Bottom state diagram of Figure 1
Figure 5: Perspective view of a manhole cover installed with a locking device of the present invention
Figure 6: Bottom perspective view of Figure 5
Figure 7: Bottom state diagram of Figure 5
Figure 8: Perspective view of the locking device portion of the present invention
Figure 9: exploded perspective view of Figure 8
Figure 10: Diagram of a part of the lock socket cut in the state of Figure 9
Figure 11: State diagram showing the locking tool used in the present invention from another direction
Figure 12: Bottom perspective view of a manhole cover of an embodiment in which the spring thrust means are different in the locking device of the present invention
Figure 13: Bottom configuration diagram of Figure 12
Figure 14: Enlarged perspective view of the main part of Figure 12
Figure 15: exploded perspective view of Figure 14
Figure 16: Enlarged perspective view of the through-hole portion applied in Figure 12

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figures 1 to 4 are diagrams of the manhole 10 in which the manhole cover 30 equipped with a locking device is coupled to the pedestal 20 on which the locking protrusion 21 is formed, and Figures 5 to 11 show the manhole cover 30. This is a detailed diagram to explain the installed locking device.

The locking device of the present invention is installed at equal intervals on three inner bottom surfaces of the main body 31 of the manhole cover 30, and a diaphragm 33 is formed in the center of the inner bottom surface of the manhole cover 30, and the diaphragms 33 are spaced at equal intervals. A radial reinforcement piece 32 is formed to reinforce the durability of the main body 31 of the manhole cover 30, and the plate 33 has three through holes 34, and the through holes 34 A locking device 40 is installed at this opened position.

The locking device 40 is composed of a locking socket 50 integrally molded on the bottom of the manhole cover 30, and an integrated locking tool 60 elastically assembled to the locking socket 50.

As shown in FIGS. 8 to 10, the locking socket 50 forms a circular storage compartment 51 with both sides open on the inner surface of the square body 59, and the circular storage compartment 51 has a cutout portion 53. The interior is opened through.

In the cut part 53, a fitting cut part 54 wider than the gap between the cut parts 53 is formed to form a protrusion 55, and it is hung on the bottom of the circular storage room 51 facing the cut part 53. A jaw 57 forms a locking groove 56.

The locking device 60 inserted into the locking device socket 50 is configured as follows.

8 to 11, a locking piece 70 and a protruding protrusion 71 are formed on one side of the circular rod body 61, and the locking piece 70 is formed with an upper slope 72 and a lower slope 73. do.

The circular rod body 61 is formed with two cutting portions 62, forming a circular protrusion 63 between the cutting portions 62, and on the other side of the locking piece 70, a support rod with a smaller diameter than the circular rod body 61 ( 64), and a hanging frame 65 is formed between the support rod 64 and the circular rod body 61.

In addition, a locking protrusion 66 is formed at the center of the circular rod body 61 so that the locking member 60 moves forward and backward and rotates left and right within a certain range when inserted into the locking groove 56 formed in the locking socket 50. .

At this time, the two cutting parts 62 formed on the circular rod body 61 of the locking sphere 60 coincide with the two protrusions 55 formed on the locking socket 50, and the circular protrusions 63 of the locking sphere 60 ) coincides with the insertion cut portion 54 of the locking socket 50.

In order to elastically install the locking device 60 of the above-described configuration to the locking device socket 50, a spring 85, a spring support device 80, and a stopper 90 are used.

As shown in FIGS. 9 and 10, the spring support member 80 includes a locking piece 82 on one side of a support portion 81 made of a metal rod, and a protrusion 83 with a coupling hole 84 on one side of the locking piece 82. ) is composed.

The stopper 90 consists of a locking piece 91 and a protrusion 92, and a coupling hole 94 with a cutout 93 is formed in the protrusion 92.

The means for elastically installing the locking device 60 to the locking device socket 50 is as follows.

As shown in Figure 9, the locking protrusion 66 formed on the circular rod body 61 of the locking tool 60 is located on the side of the cutout 53 of the locking socket 50, and the cutting part of the locking tool 60 ( 62) is positioned in line with the protrusion 55 of the lock socket 50.

When the lock 60 is pushed into the lock socket 50 in the above state, the cut portion 62 and the circular protrusion 63 formed on the circular rod body 61 are formed, and the protrusion 55 formed on the cut portion 53 ) and the insertion cutting portion 54, the locking device 60 is assembled into the circular storage compartment 51 of the locking device socket 50.

At this time, the locking protrusion 66 formed on the circular rod body 61 is inserted into the locking groove 56 formed on the circular storage compartment 51, and the length and width of the locking groove 56 are determined by the length of the locking protrusion 66. and is slightly longer and wider than the width, so that the circular rod body 61 of the lock 60 moves forward and backward and rotates left and right at a constant width while being inserted into the receiving chamber 51 of the lock socket 50.

Installation of the spring 85 that pushes the locking device 60 in the outward direction, that is, in the direction opposite to the arrow (A), is as follows.

That is, in a state where the circular rod body 61 of the locking hole 60 is inserted into the circular storage chamber 51 of the locking ball socket 50, through the through hole 34 drilled in the diaphragm 33 of the manhole cover 30. The spring 85 is inserted into the support bar 64 of the lock 60 so that it is no longer inserted by the locking frame 65 and is stopped.

In the above state, when the support portion 81 of the spring support member 80 is inserted into the end of the spring 85, the end of the spring 85 comes into contact with the locking piece 82, and the spring support member 80 is connected to the spring 85. In the state where it is inserted into the end, insert the pressure bar of a separate tool, that is, a pressurizer (not shown), which is a tool for compressing the spring 85, into the coupling hole 84, and then move the pressure bar forward to compress the spring 85. As this happens, the spring support member 80 moves forward toward the locking member 60.

When the spring support unit 80, which moves while compressing the spring 85 by the pressurizing rod of the pressurizer, leaves the through hole 34 of the diaphragm 33, the compression operation of the spring 85 is stopped and then the spring support unit ( 80) Insert the stopper (90) on the outside.

That is, since the spring 85 is compressed while the pressurizing bar of the pressurizer is inserted into the coupling hole 84 of the spring support member 80, the pressurizing bar supports the spring support member 80.

Therefore, when the pressure bar is passed through the cutout 93 formed in the stopper 90, the stopper 90 is located behind the spring support member 80, and the protrusion 92 of the stopper 90 is located at the diaphragm 33. When inserted into the through hole 34, the locking piece 91, which is larger than the through hole 34, is caught and fixed to the diaphragm 33.

In the above state, when the pressing force of the pressurizing machine compressing the spring 85 through the spring support member 80 is relaxed, the spring 85 returns and the spring support member 80 is pushed toward the diaphragm 33, and thus The protrusion 83 is inserted into the coupling hole 94 of the stopper 90, and the locking piece 82 is caught and fixed on the protrusion 92, so that the lock 60 inserted into the lock socket 50 is spring-loaded. Installation is completed with the attachment at (85).

As described above, when the lock 60 is inserted into the circular compartment 51 of the lock socket 50 and is supported by the spring 85, the lock 60 is pushed in the direction opposite to the arrow (A). The locking protrusion 66 of the locking tool 60 is caught by the locking protrusion 57 of the locking groove 56 and the movement is stopped, and the protruding protrusion 71 of the locking tool 60 is located on the open hole 36. The locking piece 70 is located below the edge of the manhole cover 30, and the circular protrusion 63 and the circular rod body 61 of the locking hole 60 are located on the protruding portion 55 of the locking socket 50. ), so the locking device 60 inserted into the locking device socket 50 can move forward and backward and rotate left and right, while being prevented from leaving.

A spring 85 that pushes the locking device 60 in an outward direction, that is, in the direction opposite to the arrow A, can be installed by another means.

That is, as shown in FIGS. 12 to 16, through holes 34 formed in the partition 33 are provided with through grooves 37 extending outward at equal intervals, and between the through grooves 37 there is a locking groove 38. ) to form a locking protrusion 39, and the locking groove 38 is formed on the side where the spring 85 is located.

The spring 85 elastically installed between the support bar 64 of the locking device 60 and the partition 33 is supported by the spring support member 80-1.

The spring support member 80-1 is a cylindrical tube body 83-1, and has a coupling hole 82-1 on its inner surface slightly larger than the outer diameter of the support bar 64 of the locking member 60, and on one side on its outer surface. A thick part (84-1) larger than the outer diameter of the cylindrical tube body (83-1) is formed so that a step (85-1) is formed between the cylindrical tube body (83-1) and the thick part (84-1).

A locking piece (86-1) is formed in the thick portion (84-1), and the number of locking pieces (86-1) is the same as the number of through grooves (37) drilled in the through hole (34) of the diaphragm (33). Compose it properly.

The spring support member 80-1 of the above-mentioned configuration is placed inside the diaphragm 33, and then the cylindrical tube body 83-1 is inserted into the through hole 34 to form the coupling hole 82- of the cylindrical tube body 83-1. 1), the support bar 64 of the locking hole 60 into which the spring 85 is inserted is inserted, and the locking piece 86-1 formed on the thick portion 84-1 of the spring support member 80-1 penetrates. It is located in the groove (37).

In the above-mentioned state, a separate pressurizing tool, that is, a press bar of a pressurizer (not shown), which is a tool for compressing the spring 85, is inserted into the end of the coupling hole 82-1 and caught on the inner surface of the diaphragm 33, When the pressure bar is moved forward in the above state, the spring 85 is compressed, and the spring support member 80-1 moves toward the locking member 60.

When the locking piece (86-1) of the spring support member (80-1), which moves while compressing the spring (85) by the pressurizing rod of the pressurizer, leaves the through groove (37) formed in the diaphragm (33), the spring support member (80-1) moves. Rotate (80-1) at a certain angle so that the locking piece (86-1) is positioned on the locking groove (38).

In the above-described state, when the pressing force of the pressurizer is relaxed, the spring support member 80-1 is pushed by the compressive force of the spring 85, and the locking piece 86-1 formed in the thick portion 84-1 is connected to the diaphragm 33. The spring (85) is inserted into the locking groove (38) formed on the outer peripheral surface of the through hole (34) and is fixed by hooking on the locking jaw (39), and thus is elastically installed between the locking member (60) and the spring support member (80-1). Installation of the locking tool 60 is completed in a state in which it is pushed in the direction opposite to the arrow (A).

As described above, when the lock 60 is inserted into the circular compartment 51 of the lock socket 50 and is supported by the spring 85, the lock 60 is pushed in the direction opposite to the arrow (A). , the locking protrusion 66 of the locking device 60 is caught by the locking protrusion 57 of the locking groove 56 and the movement is stopped, and the protruding protrusion 71 of the locking device 60 is located on the open hole 36. is located, the locking piece 70 is located below the edge of the manhole cover 30, and the circular protrusion 62 and the circular rod body 61 of the locking hole 60 are the protrusions of the locking socket 50 ( Since it is located within 55), the locking device 60 inserted into the locking device socket 50 can move forward and backward and rotate left and right, while being prevented from leaving.

The locking device of the manhole cover 30 configured as described above operates as follows.

That is, when the manhole cover 30 is placed on the pedestal 20, the locking piece 70 of the locking hole 60 located on the lower side of the rim of the main body 31, that is, the lower slope 73, is the locking piece of the pedestal 20. (21) It is located at the end, and when a load is applied to the manhole cover (30) in the above state, the locking hole (60) supported by the spring (85) is pushed in the direction of the arrow (A), and the locking piece (70) is As shown in FIG. 3 , the upper inclined surface 72 of the locking piece 70 is caught on the locking shoulder 21 and locked.

As described above, since the manhole cover 30 coupled to the pedestal 20 is locked by the locking device 40 installed at equal intervals in three locations, rattling or noise of the manhole cover 30 during use is prevented. , It is no different from the patent (No. 10-2263386) previously registered by the present inventor.

The manhole cover locking device of the present invention simplifies the configuration by integrating the locking hole 60 that is inserted into the locking socket 50, thereby simplifying manufacturing and assembly, and at the same time includes a spring 85 that supports the locking ball 60. ) is installed stably.

In other words, the manhole cover 30 has a locking piece 70 for locking and opening, a protruding protrusion 71, and a locking protrusion that controls the movement and rotation of the lock 60 by the elastic force of the spring 85. (66), a support bar (64) that couples the locking hole (60) to the locking socket (50), and supports the cutting portion (62), the circular protrusion (63), and the spring (85) that prevents separation after being coupled. and the locking frame 65 are integrated into the circular rod body 61, making manufacturing and assembly easy.

In particular, the spring 85, which is elastically installed between the plate 33 and the locking hole 60 of the manhole cover 30, can be installed easily and stably.

That is, when the circular protrusion 63 of the locking hole 60 is placed in the insertion cutting part 54 of the locking ball socket 50 and then pushed in, the locking ball 60 is inserted into the circular storage compartment 51 of the locking ball socket 50. ), and if the locking member 60 is pushed slightly in the outward direction (opposite direction of arrow A), the circular protrusion 63 and part of the circular rod body 61 are located within the protruding part 55 of the locking socket 50. Escape is prevented.

At this time, the locking protrusion 66 of the locking device 60 is inserted into the locking groove 56 of the locking socket 50 and is caught by the locking protrusion 57 when the locking device 60 is pushed outward, preventing further movement. As this happens, the locking piece 70 and the protruding protrusion 71 stop in place on the bottom of the manhole cover 30.

In addition, the locking groove 56 formed in the locking socket 50 is slightly larger than the length and width of the catching protrusion 66 formed in the locking hole 60, so that the locking hole 60 inserted into the locking socket 50 It becomes possible to move and rotate at a certain distance and at a certain angle.

Even when the spring 85 is installed in a state in which the lock 60 is assembled in the circular storage compartment 51 of the lock socket 50, the spring 85 is installed through the through hole 34 in the diaphragm 33. Insert it into the support bar 64 of the lock 60, then insert the spring support 80, compress the spring 85 using a separate tool, and insert the stopper 90 through the diaphragm 33. The spring 85 can be easily installed by inserting it into the ball 34 and fixing the spring support member 80 to the stopper 90.

In particular, when the spring 85 is installed, the support bar 64 of the locking member 60 and the support portion 81 of the spring support member 80 stably support the spring 85.

As a thrust means of the present invention, a locking groove 38 formed with a through groove 37 and a locking protrusion 39 is formed in a through hole 34 formed in the partition 33 as shown in FIGS. 12 to 16, and Insert the spring 85 into the support bar 64 of the locking hole 60 through the through hole 34, and then insert the spring support member 80-1 on which the locking piece 86-1 is formed into the through hole 34. Insert, so that the spring 85 is compressed as the locking piece 86-1 of the spring support member 80-1 is inserted through the through groove 37 of the through hole 34, and in the above state, the spring support member 80-1 is inserted through the through groove 37 of the through hole 34. By rotating (80-1), the locking piece (86-1) is inserted into the locking groove (38) and is fixed to the locking protrusion (39) so that the spring (85) can be elastically installed.

In the above case, the spring 85 elastically installed between the lock 60 and the diaphragm 33 can be easily installed.

The locking and opening of the manhole cover 30 using the locking device 40 is the same as the patent (No. 10-2263386) previously registered by the present inventor, but is briefly explained as follows.

The locking device 40 of the present invention is installed at three locations on the inner bottom of the manhole cover 30 at equal intervals (120°) to stably support the manhole cover 30.

The combination of the manhole cover 30 and the pedestal 20 is such that when the manhole cover 30 is placed on the pedestal 20, the lower slope 73 formed on the catching piece 70 of the locking hole 60 is connected to the pedestal 50. ) is located at the end of the locking ledge 21, and when a load is applied by the manhole cover 30 in the above state, the lock 60 compresses the spring 85 by the lower slope 73 and arrows (A) ) direction and then over the locking ledge (21), it is pushed in the direction opposite to the arrow (A) by the elastic force of the spring (85) and the upper inclined surface 72 of the locking piece 70 is pushed against the locking ledge of the pedestal 20. (21) Located at the bottom, the manhole cover (30) is locked.

When you want to open the manhole cover (30), use a tool such as a lever, insert it into the protruding protrusion (71) of the stopping piece (70) through the opening hole (36) of the manhole cover (30), and then press the lever. The manhole cover 30 is lifted while being supported at the upper end of the pedestal 20, and at this time, the lock 60 is pushed in the direction of the arrow A by the upper slope 72 of the stopping piece 70, and the manhole cover 30 is lifted. ) is opened.

At this time, the locks (60) located in the remaining two places are also pushed in the direction of the arrow (A) by the upper inclined surface (71), thereby opening the manhole cover (30) and entering the circular storage compartment (51) of the lock socket (50). Since the inserted locking hole 60 rotates at a certain angle, the manhole cover 30 can be opened smoothly.

As described above, the locking device 40 to be provided in the present invention not only simplifies manufacturing and assembly by integrating the locking device 60, but also allows the installation of the spring 85 through the through hole formed in the diaphragm 33. Since this is done through (34), not only can it be easily installed, but it can also be maintained stably even after installation.

(10)--Manhole (20)--Pedestal
(21)--Lap (30)--Manhole cover
(31)--Main body (32)--Reinforcement piece
(33)--Diaphragm (34)--Through hole
(36)--Open hole (40)--Lock device
(50)--Lock socket (51)--Round storage compartment
(53)--cutting part (54)--fitting cutting part
(55)--Protrusion (56)--Latching groove
(57)--Latching jaw (59)--Main body
(60)--Lock (61)--Round bar body
(62)--Cutting part (63)--Circular protrusion
(64)--Support rod (65)--Hanging frame
(66)--Hanging protrusion (70)--Hanging piece
(71)--Protrusion (72)--Upper slope
(73)--Lower slope (80)--Spring district
(80-1)--Spring support section (81)--Support section
(82)--Latching piece (82-1)--Joining hole
(83)--Protrusion (83-1)--Cylindrical tube body
(84)--Combining hole (84-1)--Rear meat part
(85)--Spring (85-1)--Step
(86-1)--Latching piece (90)--Stopper
(91)--Latching piece (92)--Protrusion
(93)--Incision (94)--Joining hole

Claims (3)

Locking sockets 50 consisting of a cutout 53, a fitting cutout 54, a protrusion 55, and a circular storage compartment 51 are installed at equal intervals on three inner bottom surfaces of the manhole cover 30, and the locking The locking hole 60 is inserted into the circular storage compartment 51 of the old socket 50, and the spring 85 is elastically installed between the locking hole 60 and the diaphragm 33 to form a locking device for the manhole cover. In this case, the locking groove 56 is formed in the circular storage compartment 51 of the locking socket 50, and the locking tool 60 fitted into the locking socket 50 is formed at the distal end of the circular rod body 61. It constitutes a protruding protrusion 71 and a locking piece 70 formed with upper and lower inclined surfaces 72 and 73, and two cutting portions 62 are formed in the center of the circular rod body 61, and a circular protrusion 63 is formed between them. ), a support bar 64 and a locking frame 65 are formed at the rear end of the circular bar body 61, a locking protrusion 66 is formed on one side of the central part of the circular bar body 61, and the locking hole 60 When assembled in the circular storage compartment 51 of the locking socket 50, the locking protrusion 66 of the locking socket 60 is inserted into the catching groove 56 of the locking socket 50, so that the front and rear of the locking socket 60 A locking device for a manhole cover that allows movement and left and right rotation. The method of claim 1, wherein a through hole (34) is formed in the plate (33) of the manhole cover (30), and a protrusion (92) and a locking piece (91) through which a coupling hole (94) is formed in the through hole (34). A stopper 90 composed of is inserted so that the protrusion 92 is inserted into the through hole 34 and fixed by the locking piece 91, and a support portion 81 is formed in the coupling hole 94 of the stopper 90. A manhole cover characterized in that a spring support member 80 is installed and a spring 85 is elastically installed between the support portion 81 of the spring support member 80 and the support bar 64 of the locking member 60. locking device. The method of claim 1, wherein a through hole (34) is formed in the plate (33) of the manhole cover (30), through grooves (37) are formed at equal intervals on the edge of the through hole (34), and through grooves (37) are formed at equal intervals. ) and the through groove 37, a locking groove 38 is formed with a locking protrusion 39, and a spring support member 80-1 composed of a cylindrical tube body 83-1 is inserted into the through hole 34. The spring (85) is supported, but the locking piece (86-1) formed on the thick portion (84-1) of the spring support member (80-1) is inserted into the locking groove (38) and is caught on the locking protrusion (39). A locking device for a manhole cover, characterized in that it is fixedly installed.

Images