CN1924202A

CN1924202A - Locking device for manhole cover

Info

Publication number: CN1924202A
Application number: CNA2006101285390A
Authority: CN
Inventors: 濑川志朗
Original assignee: Takigen Manufacturing Co Ltd
Current assignee: Takigen Manufacturing Co Ltd
Priority date: 2005-08-31
Filing date: 2006-08-30
Publication date: 2007-03-07
Anticipated expiration: 2026-08-30
Also published as: JP2007063851A; KR20070026023A; CN100564783C

Abstract

To provide a lid locking device for an entrance etc. of a multipurpose underground duct which prevents an unlocking disabled state caused by the infiltration of a foreign matter, allows an operator to check whether a lid is locked or unlocked at a first sight, and facilitates unlocking operation. The lid locking device is formed of a cylindrical body 11, shaft members 12, an output shaft member 13, a locking member 14, and a cam plate 15b. The cylindrical body 11 has a cap bearing 11c formed at the upper edge thereof for detachably fitting a cap 16 therein, and has vertical holes 11d formed at predetermined locations of the cap bearing. The shaft members 12 are inserted into the respective vertical holes formed at the cylindrical body, and energized downward by an elastic body 20. The output shaft member 13 has an operating groove 13a formed at the upper edge thereof so as to be rotatable, has a non-cylindrical engaging surface 13b formed in an intermediate portion thereof, and is rotatably inserted into the cylindrical body. The locking member 14 is engaged with the engaging surface of the output shaft member fixed to a lower portion of the same, and engages with a bearing portion 33 of a manhole fixed bearing frame 32 so as to be disengaged therefrom. The cam plate 15b has a protrusion 15 which is engaged with the engaging surface of the output shaft member fixed to the lower portion of the member, and abuts on the lower edge of each shaft member to press the shaft member upward.

Description

Locking device for manhole cover

Technical field

The present invention relates to the employed locking device of manhole cover of a kind of common trench of taking in communication cable, power transmission cable, upper and lower conduit etc.

Background technology

In the employed locking device of lid of the access of common trench etc., in order not allow foreign matter such as earth stop up the lockhole of lock unit, have a kind of in lockhole the chimeric locking device that lid is arranged.In this locking device, owing to be difficult for judging locking state and released state, so might under forgetting the state that locks, lid be entrenched in the keyhole, in this case, even without key, lid also can open and close, and the people outside the proper authority person might swarm into common trench.

Prevent this locking device of forgetting the function that locks as having, exemplified disclosed locking device in No. 3291269 communique of Japan Patent, it comprises: the urceolus that runs through manhole cover at above-below direction; Rotatably be housed in the lock shaft that adds in this urceolus; And be fixed on the bottom that adds lock shaft, be fastened on the jam plate in the portion of bearing that fixedly bears the frame side, under released state, the upper end that adds lock shaft is outstanding from the upper end open of urceolus.

Yet, in the locking device of No. 3291269 communique of Japan Patent, be formed with cam path adding on the outer peripheral face of lock shaft, because by this cam path is slided on guide finger, the lock shaft total length that adds that is fixed with jam plate in the lower end is moved up and down in urceolus, axle is heavier so lock, and is easy to produce when opening and closing rock, and the operability when locking during with release has problems.

Therefore, the objective of the invention is to, provide a kind of a glance can confirm locking state or released state and the lid locking device of when locking and the good common trench access of the operability during release etc.

Summary of the invention

In the present invention, a kind of locking device for manhole cover 10 is provided, it is characterized in that, comprise: tubular body 11, this tubular body 11 is fixed on the manhole cover 30 by the vertical core 31 of chimeric insertion manhole cover 30, be provided with the lid that supplies lid 16 to embed usefulness dismantledly in upper end open and bear the 11c of portion, the regulation position of bearing the 11c of portion from this lid is equipped with vertical core 11d; Shaft component 12; This shaft component 12 is inserted the vertical core 11d of logical this tubular body 11, is subjected to the downward application of force of elastic body 20; Output shaft member 13, this output shaft member 13 are formed with the operation groove 13a that is used for rotary manipulation in the upper end, be formed with non-columned snap-latch surface 13b at pars intermedia, rotatably are inserted on the bottom of tubular body 11; Locking component 14, this locking component 14 are gone up by the snap-latch surface 13b that is fastened on this output shaft member 13 and are fixed on the bottom, separate with the portion of bearing of fixedly bearing frame 32 sides 33 engagings of manhole; And lobe plate 15, this lobe plate 15 is gone up by the snap-latch surface 13b that is fastened on output shaft member 13 and is fixed on the bottom, be formed with by on the lower end that is connected to described shaft component 12 and with the shaft component 12 protuberance 15d of pushing upwards, thereby make locking component 14 when the portion of bearing 33 breaks away from the described output shaft member 13 of rotation, lobe plate 15 also rotates linkedly with output shaft member 13, the lower end 12a that the protuberance 15d of lobe plate 15 is connected to shaft component 12 goes up and shaft component 12a is upwards pushed, make the upper end 12c of shaft component 12 be projected into lid and bear among the 11c of portion, bear the 11c of portion thereby make lid 16 can't insert lid.

In said structure,,, can utilize output shaft member 13 to be rotated operation so two member interlocks can not dally because lobe plate 15 is fastened on the snap-latch surface 13b of output shaft member 13 with locking component 14 these two members.Thus, when rotary manipulation locking component 14 broke away from its portion of bearing of fixedly bearing frame 32 sides 33 from manhole, the protuberance 15d of lobe plate 15 became the angle that contacts with the lower end 12a of shaft component 12.The protuberance 15d of lobe plate 15 makes upwards pushing of shaft component 12 upper end 12c be projected into lid and bears among the 11c of portion, bears the 11c of portion thereby make lid 16 can't insert lid.On the contrary, when rotary manipulation locking component 14 makes in its portion of bearing 33 of fixedly bearing frame 32 sides that is engaged to manhole, because the protuberance 15d of lobe plate 15 becomes the angle that breaks away from from the lower end 12a of shaft component 12, so the upper end 12c of shaft component 12 is received among the vertical core 11d of tubular body 11, can insert the state that lid bears the 11c of portion thereby become lid 16.

As mentioned above, locking device for manhole cover 10 is being locked, during release, owing to need not to make output shaft member 13 to move up and down,, do not rocking, having good operability when locking and during release so also can not produce during switching as long as be rotated operation.

In addition, because when utilizing locking device 10 to make manhole cover 30 be in locking-in state, lid 16 can insert lid and bear the 11c of portion, when if lid 16 can't insert lid and bears the 11c of portion, then be to be in the state of lock, so a glance can confirm that this locks, released state, thereby can prevent to forget situation about locking.In addition, bear the 11c of portion, can prevent that foreign matter such as earth from bearing that the 11c of portion flows into and can't release from lid by lid 16 is inserted lids.

In locking device for manhole cover of the present invention, the upper end 12c of described shaft component 12 can be coloured to the lid of tubular body 11 and bear the different color of the 11c of portion.Like this, by on the 12c of the upper end of shaft component 12 painted portion being set, it is outstanding to judge more easily whether shaft component 12 bears the 11c of portion from lid.

In addition, connection shaft member 18 can be inserted described tubular body 11, this connection shaft member 18 has the output holding section 18e that engages with described operation groove 13a and revolving force can be passed to described output shaft member 13 in the lower end, have the input holding section 18a, the 18b that engage with the end 21a of handle 21 with operation and can accept revolving force in the upper end.

Adopt locking device for manhole cover of the present invention, a glance can be confirmed to be locking state or released state, and has good operability when locking and during release.

Description of drawings

Fig. 1 is the sectional view of locking device for manhole cover of the present invention.

Fig. 2 is the sectional view of locking device for manhole cover when locking.

Fig. 3 is the sectional view of locking device for manhole cover when releasing locks.

Fig. 4 (a) is the vertical view of tubular body, and Fig. 4 (b) is the sectional view along the X1-X1 line, and Fig. 4 (c) is the sectional view along the Y1-Y1 line.Fig. 4 (d) is the lateral view that is inserted in the indication pin on the tubular body.

Fig. 5 is output shaft member, connection shaft member and the operation stereogram with handle.

Fig. 6 (a) is the vertical view of locking component, and Fig. 6 (b) is a sectional view.

Fig. 7 (a) is the vertical view of lobe plate, and Fig. 7 (b) is the sectional view along the X2-X2 line, and Fig. 7 (c) is the lateral view of seeing from the X2 direction, and Fig. 7 (d) is the sectional view along the Y2-Y2 line, and Fig. 7 (e) is the lateral view of seeing from the Y2 direction.

(component symbol explanation)

10 locking device for manhole cover

11 tubular bodies

The 11c lid bears portion

The 11d vertical core

12 indication pins (shaft component)

13 output shaft members

13a operates groove

The 13b snap-latch surface

14 locking components

15 lobe plates

The 15d protuberance

16 inside cover

18 connection shaft members

The 18a central spud

18b periphery protuberance

Holding section, 18e lower end

20 springs (elastic body)

30 manhole covers

31 vertical cores

32 fixedly bear frame

33 bear portion

The specific embodiment

The present invention will be described with reference to the accompanying drawings, but the present invention is not limited thereto.

Shown in the sectional view of Fig. 1, locking device for manhole cover 10 of the present invention mainly comprises: tubular body 11, indication pin (shaft component) 12, output shaft member 13, locking component 14 and lobe plate 15, as shown in Figure 2, fixing in the vertical core 31 of its insertion manhole cover 30.

Fig. 2 represents is the state of manhole cover 30 when being locked by locking device for manhole cover 10, locking component 14 is fastened in the portion of bearing 33 of fixedly bearing frame 32 sides of manhole, inboard lid 16 is inserted in the tubular body 11, and outside lid 17 is entrenched in the engaging recessed part 34 of manhole cover 30.At this, inboard lid 16 is made by adsorbable metal material such as magnets, and in addition, outside lid 17 is made by against weather good rubber or synthetic resin material.On the other hand, Fig. 3 represents is the state of locking device for manhole cover 10 when removing, and locking component 14 breaks away from from the portion of bearing 33, and indication pin 12 projects to the upper end of tubular body 11, thus, inboard lid 16 can't be inserted.

Below, each structure of locking device for manhole cover 10 is described.

Fig. 4 (a)～4 (c) is respectively the vertical view of tubular body 11, along the sectional view of X1-X1 line, along the sectional view of Y1-Y1 line.

Central authorities at tubular body 11 are formed with the through hole 11a that is used to insert output shaft member 13 and connection shaft member 18, are carved with negative thread 11b in the upper end of this through hole 11a.The upper end open of through hole 11a is cut into step-like, and the lid that is formed for embedding inboard lid 16 bears the 11c of portion.Bear the 11c of portion from lid, wear vertical core 11d at a plurality of positions, be formed with flange 11e, be formed with the 11f of grooving portion in the lower end of vertical core 11d in the upper end of vertical core 11d, the 11f of this grooving portion is fixed with pin fixed head 19 (with reference to Fig. 1) as the space that the protuberance 15d for lobe plate 15 moves usefulness.In addition, on the outer peripheral face of tubular body 11, be formed with stage portion 11g, on this stage portion 11g,, be provided with O shape ring 24 and stationary annular pad 25 as Fig. 1～shown in Figure 3.

In vertical core 11d, be inserted with indication pin 12 and spring 20 as illustrated in fig. 1.Shown in Fig. 4 (d), the lower end of indication pin 12 forms dome shape, the 12a of this dome shape portion slightly above be formed with flange 12b, the upper end 12c pay eye-catching colors such as redness.The 12a of dome shape portion forms dome shape in order to be easy on the protuberance 15d of lobe plate 15 to slide, flange 12b is for the following end in contact of spring 20 and be stuck on the end face of pin fixed head 19 and be provided with.Ring-type is equipped with spring 20 on this indication pin 12, if be inserted into vertical core 11d, just spring 20 can be subjected to the reaction force of flange 11e of vertical core 11d and the pin of pushing indication downwards 12 so, on the contrary, 19 of pin fixed heads are from supported underneath indication pin 12.

Below, Fig. 5 is output shaft member 13, connection shaft member 18 and the operation stereogram with handle 21.

As shown in the figure, the upper end of output shaft member 13 is formed with operation groove 13a, is formed with at pars intermedia and is cut into non-columned snap-latch surface 13b, is provided with stage portion 13c between these operation groove 13a and snap-latch surface 13b, is carved with pin thread 13d in the lower end.

In addition, the central authorities of the upper surface of connection shaft member 18 give prominence to and are provided with columned protuberance 18a, and at the outstanding roughly protuberance 18b of crescent shape that is provided with of the periphery of upper surface, ring-type is equipped with O shape ring 18d, holding section, the lower end 18e in the lower end is provided with the operation groove 13a that can be fastened on output shaft member 13 in the endless groove 18c of pars intermedia.

In addition, on the upper end that can be fastened on connection shaft member 18, operation wears porose 21b with the bottom 21a of handle 21, and periphery is formed with cut sides 21c.This hole 21b is entrenched on the central spud 18a of connection shaft member 18, and cut sides 21c is fastened on the peripheral protuberance 18b of connection shaft member 18.In addition, with on the handle 21, vertical axis 21d is formed with handle part 21e from bottom 21a extension in the upper end of operating with handle 21 in operation.This handle part 21e forms an end and has magnetic force, thus, by adsorbing inboard lid 16, inboard lid 16 is born the 11c of portion from the lid of tubular body 11 take off.

As shown in Figure 1, insert tubular body 11 respectively, make operation be rotated operation, come output shaft member 13 is rotated operation with the upper end that handle 21 is fastened on connection shaft member 18 by the output shaft member 13 and the connection shaft member 18 that will have said structure.

Below, as shown in Figure 6, the end face 14a of locking component 14 forms smooth round-shaped, at the substantial middle perforating 14b of this end face 14a.Below the 14b of hole, be formed with recess 14c as the space that is used to install nut 22 grades.In addition, locking end 14d on the position that is lower than end face 14a slightly outstanding be arranged to step-like.On the non-columned snap-latch surface 13b that is fastened on output shaft member 13, the shape of hole 14b forms its corresponding shape.

As shown in Figure 1,, nut 22 is screwed on the pin thread 13d of these lower ends, thus, locking component 14 is fixed on the tubular body 11 inserting the slotting hole 14b that leads to the locking component 14 of this structure in lower end of the output shaft member 13 of tubular body 11.Because engaging has the snap-latch surface 13b of output shaft member 13 of the respective shapes of forming in the 14b of the hole of locking component 14, thus locking component 14 can not dally, thereby can utilize output shaft member 13 to be rotated operation.

On the other hand, as Fig. 7 (a)～7 (e), the substantial middle of the plate-like portion 15a of the circle of lobe plate 15 wears porose 15b, and bottom surface 15c forms general planar, is formed with protuberance 15d along periphery on end face.On protuberance 15d, on two roughly relative positions, be formed with breach recess 15e.On the non-columned snap-latch surface 13b that is fastened on output shaft member 13, the shape of hole 15b forms its corresponding shape.

As shown in Figure 1, the lobe plate 15 of this structure is configured on the end face 14a of locking component 14 by spring washer 23, owing in the 15b of this hole, insert the lower end that is connected with the output shaft member 13 that inserts tubular body 11,13b engages with snap-latch surface, so lobe plate 15 and locking component 14 interlocks, can not dally, can utilize output shaft member 13 to be rotated operation.In addition, the 12a of dome shape portion of indication pin 12 lower ends contacts with the protuberance 15d or the breach recess 15e of lobe plate 15.Promptly, when making the following end in contact protuberance 15d of indication pin 12 by rotary manipulation lobe plate 15, it is outstanding that the 11c of portion is born from the lid of tubular body 11 in the upper end of indication pin 12, inboard lid 16 can't be inserted, on the other hand, when the following end in contact breach recess 15e of indication pin 12, the upper end of indication pin 12 is housed in the vertical core 11d, makes inboard lid 16 can insert lid and bears the 11c of portion.

The locking device for manhole cover 10 of said structure is under state as shown in Figure 2 manhole cover 30 to be locked, when taking off this manhole cover 30, at first take off outside lid 17 and inboard lid 16, the lower end that to operate again with handle 21 is entrenched on the upper end of connection shaft member 18, rotary manipulation handle 21.Thus, revolving force is passed to output shaft member 13 from connection shaft member 18, locking component 14 and lobe plate 15 on the snap-latch surface 13b that is fastened on this output shaft member 13 are rotated, thereby make the bear portion of fixedly bearing frame 32 sides 33 disengagings of the locking end 14d of locking component 14 from manhole.At this moment, lobe plate 15 and locking component 14 interlocks, this protuberance 15d slides on the 12a of dome shape portion of indication pin 12 lower ends, will indicate upwards pushing of pin 12.The lid that the upper end 12c of indication pin 12 is projected into tubular body 11 bears among the 11c of portion, thus, makes inboard lid 16 can't be installed to lid and bears in the 11c of portion.

On the contrary, utilize operation locking component 14 to be fastened in the portion of bearing 33 of fixedly bearing frame 32 sides of manhole with handle 21, when output shaft member 13 being rotated operation, lobe plate 15 is rotated linkedly with locking component 14, the lower end of indication pin 12 breaks away from and is fastened on the breach recess 15e from the protuberance 15d of lobe plate 15, is pushed downwards by spring 20 so indication sells 12.Thus, the upper end 12c of indication pin 12 is housed in the vertical core 11d of tubular body 11, makes inboard lid 16 can insert lid and bears among the 11c of portion.

As mentioned above, in locking device for manhole cover 10, owing to be not lock state can't insert lid 16 time, so can confirm that this locks, released state at a glance, thus can prevent to forget situation about locking.

Claims

1, a kind of locking device for manhole cover, it is characterized in that, comprise: the tubular body, this tubular body is fixed on the manhole cover by the vertical core of chimeric insertion manhole cover, be provided with the lid that embeds usefulness dismantledly for lid in the upper end open of this tubular body and bear portion, the regulation position of bearing portion from this lid is equipped with vertical core; Shaft component, this shaft component is inserted the vertical core of logical this tubular body, is subjected to the elastomeric downward application of force; The output shaft member, this output shaft member is formed with the operation groove that is used for rotary manipulation in the upper end, be formed with non-columned snap-latch surface at pars intermedia, and the bottom of rotatably inserting the tubular body; Locking component, this locking component engage with the snap-latch surface of output shaft member and are fixed on the bottom, and separate with the portion's of bearing engaging of fixedly bearing the frame side of manhole; And lobe plate, this lobe plate engages with the snap-latch surface of output shaft member and is fixed on the bottom, and is formed with the protuberance that shaft component is upwards pushed with the lower end butt of described shaft component,

Thereby make the rotation of described output shaft member make locking component when the portion of bearing breaks away from, lobe plate also rotates with the action of output shaft component synergism, the lower end butt of the protuberance of lobe plate and shaft component and with upwards pushing of shaft component, make the upper end of shaft component be projected into lid and bear in the portion, bear portion thereby make lid can't insert lid.

2, locking device for manhole cover as claimed in claim 1 is characterized in that, the upper end of described shaft component is painted to the lid of tubular body and bears the different color of portion.

3, locking device for manhole cover as claimed in claim 1, it is characterized in that, insert the connection shaft member at described tubular body, described connection shaft member has the holding section that engages with described operation groove and revolving force can be passed to described output shaft member in the lower end, have the holding section that engages with the end of handle with operation and can accept revolving force in the upper end.