CN101037906A

CN101037906A - Locking device for manhole cover

Info

Publication number: CN101037906A
Application number: CNA2007100893124A
Authority: CN
Inventors: 濑川志朗
Original assignee: Takigen Manufacturing Co Ltd
Current assignee: Takigen Manufacturing Co Ltd
Priority date: 2006-03-17
Filing date: 2007-03-16
Publication date: 2007-09-19
Also published as: JP2007247326A; JP4323491B2; KR20070094496A; KR101399363B1

Abstract

The invention provides a cover use locking mechanism which can easily judge locking state and unlocking state, and which has good operability as locking and unlocking, and which share channel gateway and so on. The manhole cover use locking mechanism (10) includes: cylinder lock unit (15) for locking plate (15c) passing in and out; cylindrical main body (11) which has through hole (11a) able to be separable table-inserted with the cylinder lock unit, wherein expansion portion for locking the locking plate of the cylinder lock unit is arranged in hollow space portion, and vertical hole (11f) is set to penetrate the main body and parallel with the hollow space portion. indicating pin (12) able to run-through the vertical hole by moving up and down; output shaft member (13) which forms operation groove (13a) and which can rotatablely insert to lower end of the hollow space portion of the cylindrical main body; And locking member (14) which is fixed to lower end portion (13d) for not rotating relative to the output shaft member, and which is formed with sliding groove (14d) hold-connected by the lower end of the shaft member, and which can be locked with and separated from bearing portion (32) at lateral fixed bearing frame (31) of the manhole.

Description

Locking device for manhole cover

Technical field

The present invention relates to the employed locking device of manhole cover of a kind of shared canal 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 shared canal 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 fitted in the lockhole, at this moment, also can open and close lid even without key, the people outside the proper authority person might swarm in the shared canal.

Prevent this locking device of forgetting the function that locks as having, exemplified No. 3291269 disclosed locking device of communique of Japan Patent, it comprises: run through the urceolus of manhole cover up and down, rotatably be housed in adding lock shaft and being fixed in the bottom that adds lock shaft and the jam plate that engages with the portion of bearing of fixedly bearing the frame side in this urceolus, 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, by this cam path is moved up and down in urceolus in the lock shaft total length that adds that makes the lower end be connected with jam plate of sliding on the guide finger, therefore the axle that locks is heavier, be easy to produce when opening and closing rock, the operability when locking during with release has problems.

Summary of the invention

Therefore, the object of the present invention is to provide and a kind ofly can easily judge locking state and released state and the lid locking device of when locking and the good shared canal access of the operability during release etc.

The sign flag of paying below in the accompanying drawing describes the technical scheme that is used to deal with problems.

In the present invention, provide a kind of locking device for manhole cover 10, it is characterized in that this device comprises: cylinder lock unit 15, it comes in and goes out lockplate 15c by the operation key and locks; Tubular body 11, it is chimeric to be inserted in the vertical core of manhole cover 30 and affixed with lid, having can be in conjunction with the blank part 11a of chimeric insertion cylinder lock unit 15 discretely, in this blank part 11a, be provided with the holding section 11d that can engage, run through being provided with vertical core 11f with this blank part 11a abreast with the lockplate 15c of cylinder lock unit 15; Shaft component 12, it can insert the vertical core 11f of logical this tubular body 11 up or down; Output shaft member 13 is formed with the operation groove 13a that is used for rotary manipulation, the lower end of rotatably inserting the blank part 11a of tubular body 11 in the top; And locking component 14, it is affixed with the bottom 13d of output shaft member 13 in order not rotate with respect to this output shaft member 13, be formed with the sliding tray 14d of the lower end institute butt of described shaft component 12, can separate with the portion's of bearing engaging of fixedly bearing side of manhole, when the described output shaft member 13 of rotation makes locking component 14 from the portion's of bearing 32 disengagings, the lower end 12a butt of the sliding tray 14d of locking component 14 and shaft component 12 and upwards lift shaft component 12, make the upper end of shaft component 12 and the regulation position 15b butt of cylinder lock unit 15, thereby can prevent that cylinder lock unit 15 from inserting prescribed depth among the blank part 11a of tubular bodies 11, and then can't lock by the operation key.

In locking device for manhole cover 10 of the present invention, also can followingly constitute: near the upper end of described cylinder lock unit 15, be provided with protuberance 15b, be provided with in the upper end of the vertical core 11f of tubular body 11 can be chimeric with described protuberance 15b notch part 11g, in this notch part 11g, the protuberance 15b butt of the upper end of shaft component 12 and cylinder lock unit 15, thus prevent that cylinder lock unit 15 from inserting prescribed depth among the blank part 11a of tubular bodies 11.

Be preferably in the locking device for manhole cover 10 of the present invention, insert prescribed depth among the blank part 11a of tubular bodies 11 and when described lockplate 15c is engaged with the holding section 11d of described tubular body 11 at described cylinder lock unit 15, the protuberance 15b of described cylinder lock unit 15 is arranged to limit described shaft component 12 does not move up and down it, and described shaft component 12 is arranged to limit the rotation of described locking component 14.

Adopt locking device for manhole cover of the present invention, can easily judge locking state or released state, and can be when locking and obtain good operability during release.

Description of drawings

Fig. 1 (a) be expression locking device for manhole cover of the present invention when locking state, along the sectional view of the A-A line of Fig. 2, the sectional view of state when Fig. 1 (b) is the expression release.

Fig. 2 is the figure that expression is installed in the locking device for manhole cover on the manhole cover.

Fig. 3 (a)～Fig. 3 (d) is respectively the vertical view of tubular body, along the sectional view of A-A line, along the sectional view of B-B line, along the sectional view of C-C line, Fig. 3 (e) is the lateral view of indication pin.

Fig. 4 (a)～Fig. 4 (c) is respectively vertical view, lateral view and the upward view of output shaft member, and Fig. 4 (d) is the lateral view that 90 ° direction is seen that turns over from Fig. 4 (b).

Fig. 5 (a) is the vertical view of locking component, and Fig. 5 (b)～Fig. 5 (d) is respectively along the sectional view of the A-A line of Fig. 5 (a), the lateral view seen along the sectional view of the B-B line of Fig. 5 (a), from the C-C line direction of Fig. 5 (a).

Fig. 6 (a) is the stereogram of cylinder lock unit, and Fig. 6 (b) is the figure that overlooks the cylinder lock unit when locking from the top, the figure of Fig. 6 (c) when being release.

(component symbol explanation)

10 locking device for manhole cover

11 tubular bodies

11a through hole (blank part)

11d wide diameter portion (holding section)

The 11f vertical core

12 indication pins (shaft component)

13 output shaft members

13a operates groove

The 13d bottom

14 locking components

The 14d sliding tray

15 cylinder lock units

16 lids

30 manhole covers

31 fixedly bear frame

32 bear portion

The specific embodiment

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

As shown in Figure 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 cylinder lock unit 15, as shown in Figure 2, this locking device is locking component 14 to be engaged with the portion of bearing 32 of fixedly bearing frame 31 sides of manhole lock by intercalation is affixed in the vertical core of manhole cover 30.At this, Fig. 1 (a) is the state in order to represent to lock and the sectional view that blocks along the A-A of Fig. 2, the sectional view of the state when Fig. 1 (b) is the expression release.

Each structure to locking device for manhole cover 10 describes below.

Fig. 3 (a)～Fig. 3 (d) is respectively the vertical view of tubular body 11, along the sectional view of A-A line, along the sectional view of B-B line, along the sectional view of C-C line.

Central authorities at tubular body 11 are formed with through hole (blank part) 11a that is used to insert output shaft member 13 and cylinder lock unit 15.Through hole 11a has separately, and the different lid of internal diameter bears the 11b of portion, upper area 11c, wide diameter portion (holding section) 11d and lower end area 11e.Lid bears the 11b of portion and for chimeric lid 16 upper end open is cut into step-likely, and chimeric in upper area 11c have a cylinder lock unit 15, and wide diameter portion 11d forms internal diameter greater than upper area 11c, and lower end area 11e forms internal diameter and is slightly smaller than upper area 11c.

From the lower end of tubular body 11, vertical core 11f is parallel to through hole 11a and runs through setting.For the upper end of vertical core 11f, bear the 11b of portion with lid about half of interior all sides and connect, covered by the upper end wall thickness portion of tubular body 11 about half of outer circumferential side, and be formed with notch part 11g in interior all sides.The pars intermedia of vertical core 11f runs through wide diameter portion 11d, and the lower end 11h of vertical core 11f forms internal diameter than big slightly near the upper end.

In this vertical core 11f, can be inserted with the indication pin 12 of Fig. 3 (e) up or down.Even indication pin 12 image patterns 3 (e) owing to covered by the upper end wall thickness portion of tubular body 11 about half of the upper end open of vertical core 11f, therefore also can prevent from upwards to extract from vertical core 11f when rising like that.Shown in Fig. 4 (e), the lower end 12a of indication pin 12 forms dome shape in order to be easy to slide on locking component 14.

In addition, be formed with stage portion 11i on the outer peripheral face of tubular body 11, as shown in Figure 1, this stage portion 11i is provided with O shape circle 17 and stationary annular packing ring 18.

Fig. 4 (a)～Fig. 4 (c) is respectively vertical view, lateral view and the upward view of output shaft member 13, and Fig. 4 (d) is the lateral view that 90 ° direction is seen that turns over from Fig. 4 (b).

As shown in Figure 4, output shaft member 13 has and is formed with the flange part 13b that flat shape is hexagonal operation groove 13a in the upper end, pars intermedia 13c forms cylindric, and bottom 13d is carved with screw thread and is formed with vertical slot 13e in both sides, is provided with along the axially extended through hole 13f of member in central authorities.As shown in Figure 1, this output shaft member 13 is inserted among the through hole 11a of tubular body 11, and flange part 13b engages with wide diameter portion 11d, and pars intermedia 13c inserts the lower end area 11e of logical tubular body 11, bottom 13d inserts and is connected with locking component 14, and is fixing by nut 20 across disc spring packing ring 19.

Operation groove 13a is used for being fitted to instrument wherein, and the back is rotated operation to output shaft member 13.Therefore in addition, pars intermedia 13c forms cylindric, and is not carved with screw thread, can rotate in the lower end area 11e of the through hole 11a of tubular body 11.

Fig. 5 (a) is the vertical view of locking component 14, and Fig. 5 (b)～Fig. 5 (d) is respectively along the sectional view of the A-A line of Fig. 5 (a), the lateral view seen along the sectional view of the B-B line of Fig. 5 (a), from the C-C line direction of Fig. 5 (a).

On locking component 14, be formed with through hole 14a, the outstanding engaging protuberance 14b that is provided with in this through hole 14a.This through hole 14a is the position that is used to run through the bottom 13d that inserts described output shaft member 13, the vertical slot 13e of engaging protuberance 14b and output shaft member 13 is chimeric, thus, output shaft member 13 rotates integratedly with locking component 14, thereby can prevent the idle running of two members 13,14.The end face 14c of locking component 14 is formed flatly, and is formed with sliding tray 14d on this end face 14c.In sliding tray 14d, extend from the inclined plane 14g that carves the most deeply deep 14e forward end 14f and rise circle-shapedly, front end 14f forms with end face 14c highly roughly the same.Shown in Fig. 1 (a), the lower end 12a of indication pin 12 is connected among the sliding tray 14d, makes locking component 14 when both forward and reverse directions rotates, and inclined plane 14g slides on the lower end 12a of indication pin 12, thereby indication is sold 12 and lifted, falls.Fig. 1 (b) expression lift the highest state.

In addition, in the inboard of locking component 14, be formed with thin-walled recess 14g around through hole 14a, this thin-walled recess 14g becomes the receiving space of disc spring packing ring 19 and nut 20.In locking component 14, the position 14h that is not formed with thin-walled recess 14g works as the 14h of the portion that is locked and fastened that engages with the portion of bearing 32 of fixedly bearing frame 31 sides of manhole.

Fig. 6 (a) is the stereogram of cylinder lock unit 15, and Fig. 6 (b) is the figure that overlooks the cylinder lock unit 15 when locking from the top, the figure of Fig. 6 (c) when being release.

Cylinder lock unit 15 constitutes: near the outstanding protuberance 15b that the is provided with upper end of framework 15a cylindraceous, near the lower end of framework 15a, can be provided with lockplate 15c highlightedly, after being inserted lockhole 15d, rotates by key (not shown), lockplate 15c image pattern 6 (b) is outstanding from framework 15a like that, or image pattern 6 (c) retraction like that.

Shown in Fig. 1 (a), when this cylinder lock unit 15 is inserted among the through hole 11a of tubular body 11, between the upper area 11c of framework 15a and through hole 11a, there is the gap hardly, the protuberance 15b of cylinder lock unit 15 is fitted among the notch part 11g of vertical core 11d, lockplate 15c engages with wide diameter portion 11d, thereby cylinder lock unit 15 can't upwards be extracted.On the other hand, image pattern 1 (b) is such, and when the lockplate 15c of cylinder lock unit 15 was not arranged in wide diameter portion 11d, lockplate 15c can't give prominence to, and promptly can't rotate the key that has been inserted in the lockhole 15d.

Effect to locking device for manhole cover 10 describes below.

As shown in Figure 2, when locking component 14 engaged with the portion of bearing 32 of fixedly bearing frame 31 sides of manhole and locks, locking device for manhole cover 10 became the state of Fig. 1 (a).

That is, the deep 14e of the lower end 12a of indication pin 12 and the sliding tray 14d of locking component 14 contact, indication sell 12 be positioned at below, be formed with a little gap in the upper end of the vertical core 11f of tubular body 11.Utilize this gap, the protuberance 15b of cylinder lock unit 15 and the notch part 11g of vertical core 11f are chimeric, and cylinder lock unit 15 inserts among the through hole 11a of tubular bodies 11 and arrives the height of Fig. 1 (a).

At this moment, last end in contact or protuberance 15b and the last end in contact of indication pin 12 height that remain on Fig. 1 (a) of cylinder lock unit 15 by lower end and output shaft member 13, the lockplate 15c outstanding from framework 15a engages with wide diameter portion 11d, thereby cylinder lock unit 15 can't upwards be extracted.Thus,, also can't pull down cylinder lock unit 15, also can't be rotated operation, thereby can't open manhole cover 30 output shaft member 13 even the people outside the proper authority person has pulled down lid 16.

, thereby it can be pulled down the above-mentioned the sort of manhole cover 30 that has added lock for being carried out release, key is inserted back rotation in the lockhole 15d of cylinder lock unit 15, make in the lockplate 15c retraction framework 15a, thereby the fastening state between the wide diameter portion 11d of unlock plate 15c and tubular body 11, and then cylinder lock unit 15 upwards pulled out from tubular body 11.Then, insert instrument in the tubular body 11 and be fitted among the operation groove 13a of output shaft member 13, output shaft member 13 is rotated.Thus, locking component 14 breaks away from from the portion of bearing of fixedly bearing frame 31 sides 32 of manhole, thereby can open manhole cover 30.

When locking component 14 became from state that the portion of bearing of fixedly bearing frame 31 sides 32 of manhole breaks away from, locking device for manhole cover 10 became the such state of image pattern 1 (b).

That is, the lower end 12a of indication pin 12 contact with the front end 14f of the sliding tray 14d of locking component 14, and indication pin 12 is positioned at the top, and the upper end of the vertical core 11f of 12 upper end arrival tubular body 11 is sold in indication, at this, compares with Fig. 1 (a) and to have the gap hardly.At this moment, if cylinder lock unit 15 is inserted in the tubular body 11, then 12 last end in contact is sold in its protuberance 15b and indication, thereby can't reach the more below of Fig. 1 (b) state.So, owing to cylinder lock unit 15 can't be inserted in the tubular body 11 fully, so the operator can judge that locking component 14 breaks away from from the portion of bearing of fixedly bearing frame 31 sides 32 of manhole.

Even the operator does not see this state, when cylinder lock unit 15 stops with the height of Fig. 1 (b), lockplate 15c also is positioned at the upper area 11c of tubular body 11, therefore can't make lockplate 15c outstanding, thereby can't rotate the key in the lockhole 15d that has been inserted into cylinder lock unit 15 to the outside of framework 15a.The operator can judge easily that whether locking component 14 breaks away from from the portion of bearing of fixedly bearing frame 31 sides 32 of manhole thus.

In addition, in locking device for manhole cover 10 of the present invention,, also can prevent because of careless releases such as vehicular traffic vibrations except can easily judging the effect of locking state and released state.That is, shown in Fig. 1 (a), when cylinder lock unit 15 is inserted in the tubular body 11, the upper end butt of lockplate 15c and wide diameter portion 11d, engage, thereby cylinder lock unit 15 can't more move up.At this moment, the protuberance 15b of cylinder lock unit 15 or with the last end in contact of indication pin 12, or be positioned at height almost very close to each other, therefore indication pin 12 can't be mobile to the more top of the height of Fig. 1 (a).In addition, the deep 14e butt of the lower end 12a of indication pin 12 and the sliding tray 14d of locking component 14, therefore this locking component 14 is instructed to the lower end 12a restriction of pin 12 and can't rotates, thereby locking component 14 is kept with the state that the portion of bearing 32 of fixedly bearing frame 31 sides of manhole engages.

Therefore, even in strong places such as vehicular traffic vibrations, thereby can prevent also that locking component 14 from rotating absent-mindedly causes manhole cover to open.

Claims

1, a kind of locking device for manhole cover is characterized in that, comprising:

The cylinder lock unit is come in and gone out lockplate by the operation key and is locked;

The tubular body, in the vertical core of chimeric insertion manhole cover and affixed with lid, have and in this blank part, to be provided with the holding section that can engage in conjunction with the blank part of chimeric insertion cylinder lock unit discretely, run through being provided with vertical core with this blank part abreast with the lockplate of cylinder lock unit;

Shaft component can be inserted the vertical core that leads to described tubular body up or down;

The output shaft member is formed with the operation groove that is used for rotary manipulation, the lower end of rotatably inserting the blank part of tubular body in the upper end of this output shaft member; And

Locking component for not with respect to the rotation of described output shaft member and affixed with the bottom of output shaft member, is formed with the sliding tray of the lower end institute butt of described shaft component, can separate with the portion's of bearing engaging of fixedly bearing the frame side of manhole,

Make locking component when the portion of bearing breaks away from the described output shaft member of rotation, the sliding tray of locking component upwards lifts shaft component, make the upper end of shaft component and the regulation position butt of cylinder lock unit, thereby can prevent that the cylinder lock unit from inserting prescribed depth in the blank part of tubular body, and then can't lock by the operation key.

2, locking device for manhole cover as claimed in claim 1, it is characterized in that, near the upper end of described cylinder lock unit, be provided with protuberance, upper end at the vertical core of tubular body is provided with the notch part chimeric with described protuberance, in this notch part, the protuberance butt of the upper end of shaft component and cylinder lock unit, thus can prevent that the cylinder lock unit from inserting prescribed depth in the blank part of tubular body.

3, locking device for manhole cover as claimed in claim 2, it is characterized in that, insert prescribed depth in the blank part of tubular body and when described lockplate is engaged with the holding section of described tubular body at described cylinder lock unit, the protuberance of described cylinder lock unit is arranged to limit described shaft component does not move up and down it, and described shaft component is arranged to limit the rotation of described locking component.