JPH09256402A - Locking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release a locking device for the cover of a manhole or the like by use of a handle and then prevent the handle from being easily detached from the device. SOLUTION: A locking device 1 for locking and fixing a manhole cover to a fixed frame is formed out of a body and a handle 4. In addition, the handle 4 is engaged with a turning member having a claw 7 in the body against the pressure of a spring member 33, and the member turns between a locking position and an unlocking position on the turning motion of the handle 4. Also, a radially extended wing part 48 is formed on the axial end of the handle 4. and the handle 4, when released from an operator's hands during the stay of the member at the unlocking position, rises under the pressure of the spring member 33, and wing part 48 comes to be engaged with a downward groove 25 formed around the keyhole of the body, thereby preventing the turning motion of the handle 4 and the detachment thereof from the body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device suitable for use in a lid such as a manhole.

[0002]

2. Description of the Related Art Conventionally, various locking devices for lids such as manholes have been known. One of such devices is composed of a locking member attached to a lid and a handle that is inserted into and disengaged from a keyhole of the member, and the handle is pivoted in the left-right direction to provide a pawl for the locking member. There is one in which the metal fitting is reciprocated between a locking position and an unlocking position, and when the handle in the unlocking position is to be pulled out from the key hole, the metal fitting comes into contact with the inner surface of the lid. When the handle is gripped and the lid is lifted, the lid which is heavy and has no grip can be relatively easily opened.

[0003]

However, a person who opens and closes the lid may unexpectedly move the lid or the handle in an unexpected direction when the lid is lifted in this way, and the handle may come out of the key hole. You have to be careful not to do this, and the person who operates it is mentally burdened.

In view of this, the present invention has an object to prevent the handle from easily coming out of the keyhole when the device is in the unlocked state so as to reduce such a burden.

[0005]

In order to solve the above-mentioned problems, in the present invention, a main body which is attached to a lid such as a manhole penetrating its inner and outer surfaces and a claw fitting of the main body is detachable from a fixing frame. And a lockable and unlockable state of the lid, the main body is a casing, and the main body extends in the penetrating direction within the casing and rotates about an imaginary axis. And a rotating member having
It is premised on a locking device that can be locked and unlocked by a handle that engages and disengages with the upper end of the rotating member from the outer surface direction of the lid, and rotates the rotating member in the right and left directions by a predetermined angle. I have to.

On this premise, the present invention is characterized in that the handle extends in the penetrating direction, and a lower end portion of the shaft portion is engageable with and disengageable from the rotating member. Has a wing portion extending in one direction and a grip portion formed at an upper end portion of the shaft portion, and the casing allows the fixing means to the lid and the rotating member to be slidable in a rotating direction thereof. And a rotating member housing portion to be fitted, the housing portion having an upper end portion covered with a top plate having an insertion hole for the handle lower end portion and the wing portion, and the rotating member having the upper end portion. The lower end portion of the rotating member is irremovably engaged with the vicinity of the lower end portion of the storage portion, and the rotating member has an upper end portion that engages with the lower end portion of the handle. And a mounting means for the claw fitting at the lower end of the member, Between the storage unit top plate and the upper end of the rotating member, a backing plate capable of closing at least a part of the insertion hole on the inner surface of the top plate, and a corresponding plate below the backing plate. A spring member capable of press-contacting the inner surface of the top plate is interposed, and the handle inserted into the housing portion against the spring member is locked in the locking direction while engaging with the rotating member. The wing portion engagement capable of preventing the rotation of the handle by engaging the wing portion with the inner surface of the top plate corresponding to the position of the handle member wing portion when the handle is rotated by an angle under the bias of the spring member. The joint is formed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the locking device according to the present invention will be described below with reference to the accompanying drawings.

A locking device 1 shown in a partially cutaway perspective view of FIG. 1 is composed of a main body 3 attached to a lid 2 of a manhole and a handle 4 which is engaged with and disengaged from the main body 3. Lid 2
Is fitted in the fixed frame 6, and the lower end of the main body 3 is pivotable in the horizontal plane. When the handle 4 rotates clockwise as indicated by the arrow X,
The claw fittings 7 also rotate, each takes a position of a virtual line, and the device 1 is unlocked.

When the handle 4 is in the locked state (state shown by the solid line in the figure), it can be pulled out from the key hole 5 at the top of the main body 3, and when it is in the unlocked state (state shown by the phantom line). ,
It cannot be pulled out. Therefore, the lid 2 in the unlocked state is
It can be easily opened by holding the top grip portion 46 of the handle 4 and pulling it up.

FIG. 2 shows I of the locking device 1 shown by the solid line in FIG.
It is a partial arrow view taken along the line I-II, but the handle 4 is in a removed state. The main body 3 includes a casing 10 and a columnar rotating member 11 housed in the casing 10.

In the casing 10, a cylindrical body 12 is fitted in a mounting hole 13 which penetrates between the inner and outer surfaces 2A and 2B of the lid 2, and a top flange 14 is a washer 16 and a packing 17.
It is in contact with the outer surface 2A of the lid 2 via. A nut 18 is screwed onto the lower end of the body 12, and the nut 18 is
The casing 10 is attached to the lid 2 by being pressed against the lower surface 2B of the lid 2 via the ring 19. The inside of the casing 10 is a storage portion 21 into which the rotating member 11 is slidably fitted around the axis thereof, and the top of the storage portion 21 excluding the keyhole 5 and the top plate portion 22 integrated with the flange 14. Is covered by. The keyhole 5 is a circular central portion 5
A rectangular groove 25 extending in the direction orthogonal to the line connecting the left and right extending portions 5B is formed on the inner surface of the top plate portion 22. Is formed, and one end of the groove 25 is connected to the central portion 5A. On the outer surface of the top plate portion 22, a disc 26 that can be swiveled in a horizontal plane is attached via a support shaft 27, and the key hole 5
It acts as a lid that prevents rainwater and dust from entering the tank (see also Fig. 1).

The rotating member 11 has a concave portion 31 having a circular opening shape at the center of the top thereof, and an upper edge portion of a peripheral wall which defines the concave portion 31 is located at a portion located in the left-right direction in FIG. The handle 4 has a cutout portion 32 into which the post-described wing portion 48 can be fitted and removed. The recess 31 includes an upper portion 31A having a large diameter and a lower portion 31B having a small diameter, and a coil spring 33 and a contact plate 34 are housed inside. The lower surface of the contact plate 34 is pressed by the spring 33, and is pressed against the inner surface of the top plate portion 22 in the vicinity of the keyhole 5. An O-ring 34, which abuts the side wall of the storage portion 21, and groove portions 36 and 37 formed in the circumferential direction of the side wall and the turning member 11, respectively, are housed in the lower portion of the turning member 11, and the O-ring 34 and the groove portions 36 and 37 are formed in the circumferential direction. Rotating member 1 extending to
There is a retaining ring 38 of 1. The lower end portion 39 of the rotating member 11 extends from the lower end of the casing 12, and the rotating angle regulating ring 41 of the member 11, the claw metal fitting 7, and
The spring washers 42 are fitted in order. The ring 41 and the claw fitting 7 are provided with a nut 43 screwed to the lower end 39.
It is held by the rotating member 11 so as to be rotatable and rotatable.

The handle 4 is a grip portion 4 extending in the horizontal direction.
6 and a columnar shaft portion 47 extending in the vertical direction, and a lower end portion of the shaft portion 47 has a pair of blade portions 48 extending in the left and right directions of the diameter in FIG. 2 (see also FIG. 1). ).

FIG. 3 is a view similar to FIG. 2, showing a state in which the lower end portion of the handle 4 is inserted into the keyhole 5 of the main body 3. The lower end of the handle 4 comes into contact with the contact plate 34 to compress the spring 33, and the wing portion 48 is positioned below the inner surface of the top plate 22 and fitted into the cutout portion 32 of the rotating member 11. There is. The peripheral portion 34A of the contact plate 34 abuts on the stepped portion 51 between the upper portion 31A and the lower portion 31B of the concave portion 31 of the rotating member 11, and the contact depth regulates the insertion depth of the handle 4. There is.

In the locking device 1 in such a state, when the handle 4 is rotated clockwise as indicated by the arrow X, the wing portion 48 pushes the rotating member 11 clockwise on the wall surface 32A of the cutout 32, and the member is rotated. It is possible to rotate 11, the claw fitting 7, and the angle regulation ring 41 in the clockwise direction.

FIG. 4 is a view similar to FIG. 3 showing the state where the handle 1 is rotated 90 ° clockwise in FIG. 3 to unlock the device 1, but the handle 4 is gripped. In order to help you understand that your hands are separated,
A part of the top plate portion 22 located on the front side of the handle 4 is shown. When the hand is released from the handle 4, the spring 33
Extends and pushes up the handle 4. At this time, when the wing portion 48 of the handle 4 is fitted into the groove 25 (see also FIG. 2) of the top plate portion 22 and the handle 4 tries to rotate,
The wing portion 48 comes into contact with the side wall 25A of the groove 25 to prevent its rotation. The handle 4 in which the wing portion 48 is engaged with the groove 25 is lowered by being pressed from above against the spring 33, and the handle 4 is rotated unless the wing portion 48 is separated from the groove 25. Never.

The angle regulating ring 41 that rotates together with the rotating member 11 contacts a small portion 53 of the stopper formed at the lower end of the casing 10 from the peripheral direction, so that the rotating member 11 rotates clockwise. Further rotation of the is blocked. Since the ring 41 and the small projection 53 are well-known means that can regulate the stop position when the rotating member 11 rotates counterclockwise, their description will be omitted.

The locking device 1 described by taking the manhole cover 2 as an example in the embodiment can be widely used for other devices.

[0019]

In the locking device according to the present invention, the handle attached to the main body attached to the lid of the manhole or the like does not come off from the main body when it is in the unlocked state unless it is rotated while pressing it. . Therefore, the safety of work when gripping the handle and opening and closing the lid is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of a locking device.

FIG. 2 is a partially cutaway side view of the locking device when the handle is in a pulled out state.

FIG. 3 is a view similar to FIG. 2 when the handle is in the inserted state.

FIG. 4 is a view similar to FIG. 2 when the handle of FIG. 3 is rotated 90 ° in the unlocking direction.

[Explanation of symbols]

 1 Locking Device 2 Lid 2A Inner Surface 2B Outer Surface 3 Main Body 4 Handle 4A Gripping Part 5 Insertion Hole (Key Hole) 7 Claw Metal Fitting 10 Casing 11 Rotating Member 21 Storage Part 22 Top Plate Part 25 Engagement Part (Square Groove) 32 Engagement Part (notch) 33 spring member 34 pad plate 46 gripping part 47 shaft part 48 wing part

Claims (2)

[Claims] 1. A main body which is attached to a lid such as a manhole penetrating its inner and outer surfaces, and a claw metal fitting of the main body is engaged with and disengaged from a fixing frame so that the lid can be locked and unlocked. A handle, the main body has a casing, and a rotating member that extends in the penetrating direction inside the casing and rotates about an imaginary axis and that includes the claw metal fitting. A locking device that locks and unlocks the rotating member by rotating the rotating member at a predetermined angle in both left and right directions with the handle that engages with and disengages from the upper end of the rotating member. A shaft portion having a lower end portion that can be engaged with and disengaged from the rotating member, a wing portion that extends radially outward at the lower end portion, and a grip portion formed at the upper end portion of the shaft portion. , The casing is fixed to the lid, and the rotating member is provided around the casing. A rotating member storage portion that is slidably fitted in a direction, and the storage portion has an upper end portion covered by a top plate having an insertion hole for the handle lower end portion and the wing portion, The rotating member is non-removable from the upper end portion, while the lower end portion of the rotating member is non-removably engaged with the lower end portion of the housing, and the rotating member has the upper end portion with the handle lower end. An engaging portion for the member, and a mounting means for the claw fitting at a lower end portion of the member, and between the storage portion top plate and a rotating member upper end portion from the inner surface side of the top plate. An abutting plate capable of closing at least a part of the insertion hole, and a spring member below the abutting plate and capable of pressing the plate against the inner surface of the top plate are interposed. The handle inserted into the storage portion against the lock is engaged with the rotating member in the locking direction. The wing portion engagement capable of preventing the rotation of the handle by engaging the wing portion with the inner surface of the top plate corresponding to the position of the handle member wing portion when the handle is rotated by an angle under the bias of the spring member. The locking device is characterized in that a joint portion is formed. 2. A wing engaging portion formed on the inner surface of the top plate,
The locking device according to claim 1, wherein the locking device is a downward groove near the insertion hole.