JP2003227141A - Fastening lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fastening lock device which is simple in structure, makes its locking state clearly different from an unlocking state, is free from a danger of assuming a semi-locking state, and positively prevents unlocking thereof by prank by a person other than the authentic owner. <P>SOLUTION: According to the fastening lock device, a locking shaft 2 is mounted in a main body case 1 which is fixed to one object A, and a latch plate 3 is screwed to a screw shaft portion 6 of the locking shaft 2 via a screw hole 5 formed in a base-side end 4, whereby the latch plate 3 is held by a compressive coil spring 10 such that the locking shaft 2 is interlocked thereto. Then, a key recess 14 of an operating handle 12 is fitted onto a key projection 11 at a head 9 of the locking shaft 2 to forward/backward rotate the locking shaft 2, and the latch plate 3 is rotated until it abuts on a stopping wall portion 16 or a blocking wall portion 17 of the main body case 1. Further, the latch plate 3 is moved along the stopping wall portion 16 or the blocking wall portion 17 in an axial direction of the locking shaft 2, and then a front end 7 of the latch plate 3 is engaged with/disengaged from a bracket portion 8 of the other object B. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for locking two objects that open and close with each other in a closed position. 2. Description of the Related Art For example, in a lock device for fastening a manhole cover installed on a road surface to a fixed frame, since the lock device is exposed to wind and snow for a long period of time, its shape and structure are simplified so as to withstand corrosion. On the other hand, it is required to provide a certain level of security to prevent unauthorized opening by someone other than the authorized person. In addition, since the locking operation must be performed on a road where noise is intense, it is not easy to check whether the stopper plate has actually moved to the locking position. It is also required to provide a mechanism that can clearly identify the. [0004] Therefore, an object of the present invention is to identify the locked state and the unlocked state clearly with a simplified structure, and there is no danger of being left in a semi-locked state. It is another object of the present invention to provide a tightening lock device that can appropriately prevent unlocking by mischief other than the authorized person. [0005] Hereinafter, the present invention will be described with reference to the reference numerals in the accompanying drawings. The tightening lock device according to the present invention includes one of two objects A and B which are mutually tightened and locked. A, a main body case 1, a locking shaft 2 which is rotatably mounted on the main body case 1 with its central axis arranged in the front-rear direction of the main body case 1 and is prevented from moving in the axial direction, and a main body case 1. The base end 4 is accommodated in the screw hole 5 of the base end 4.
The stopper plate 3 is screwed into the screw shaft portion 6 of the locking shaft 2 and the tip 7 is engaged with and disengaged from the metal receiving portion 8 on the other object A side, the head 9 of the locking shaft 2 and the stopper plate 3 Is loaded between the base ends 4 of the
A compression coil spring 10 for holding the stopper plate 3 in an interlocked state with the locking shaft 2, and a main body case 1 on the front surface of the head 9 of the locking shaft 2.
Key projection 1 formed so as to be lower than the front level of
1 and an operation handle 12 having a key recess 14 formed on the distal end surface of the shaft portion 13. [0006] The tip 4 of the stopper plate 3 is connected to the receiving portion 8.
When the locking wall 2 is rotated in one specific direction when a stop wall 15 with which the base end 4 of the stopper plate 3 is in contact is formed at the distal end of the main body case 1 when in the unlocking position where the collision does not occur. A stop wall portion 16 against which one side surface 4a of the base end portion 4 of the stopper plate 3 contacts.
Is formed on the side surface of the main body case 1 in parallel with the locking shaft 2, and when the locking shaft 2 is rotated in a direction opposite to the one direction, the other side surface 4 b of the base end portion 4 of the stopper plate 3 abuts. Blocking wall 17
Is formed on the side surface of the main body case 1 in parallel with the locking shaft 2, and the opening 18 is formed in the main body case 1 so that the stopper plate 3 moves in the front-rear direction and rotates forward and reverse within a specific angle. When the two objects A and B are mutually fastened and locked as shown in FIGS. 3 and 6, the stopper plate 3 is located at the most forwardly moved position. The base end 4 of the metal plate 3 is in contact with the restraining wall 16 of the main body case 1 on one side surface 4 a, and the distal end 7 of the metal plate 3 protruding from the main body case 1 is in close contact with the metal receiving portion 8. ing. In order to release the tightening / locking, the tip of the shaft 13 of the operating handle 12 is inserted into the main body case 1, and
The key concave portion 14 of the shaft portion 13 is fitted to the key convex portion 11 of the lock shaft 2, and the lock shaft 2 is turned in a predetermined direction by the operation handle 12. Then, the stopper plate 3 held in an interlocking state by the compression coil spring 10 rotates together with the locking shaft 2, and the stopper plate 3 enters the opening 18 of the main body case 1, and the other end of the base end 4. The side surface 4b collides with the blocking wall 17 of the main body case 1. If the operation handle 12 is continuously rotated in the same direction even after the stopper plate 3 comes into contact with the blocking wall portion 16, the screw feed between the screw shaft portion 6 of the locking shaft 2 and the screw hole 5 of the stopper plate 3 is performed. The movement causes the stopper plate 3 to move toward the rear surface, and finally comes into contact with the stop wall portion 15 of the main body case 1. At this stage, the tip 7 of the stopper plate 3 is at the unlocking position completely separated from the receiving part 8. After removing the operation handle 12 from the main body case 1, the object A is opened and rotated for inspection work or the like. After the completion of the inspection work, the object A is closed and rotated toward the object B. After closing the object A to the object B, the tip of the shaft 13 of the operation handle 12 is inserted into the main body case 1, and the key recess 14 of the shaft 13 is fitted to the key protrusion 11 of the locking shaft 2, The lock shaft 2 is turned by the operation handle 12 in the opposite direction. Then, the stopper plate 3 rotates together with the locking shaft 2, and the stopper plate 3 protruding from the opening 18 of the main body case 1 is attached to the other side surface 4 a of the base end 4 by the stopping wall portion 16 of the main body case 1. Collide with When the operation handle 12 is continuously rotated in the same direction even after the stopper plate 3 comes into contact with the stop wall portion 17, the screw feed between the screw shaft portion 6 of the locking shaft 2 and the screw hole 5 of the stopper plate 3 is performed. By the movement, the stopper plate 3 moves in the front direction, and finally, the front end portion 7 of the stopper plate 3 comes into contact with the receiving portion 8 on the object B side, and the two objects A and B are tightened again to each other. Locked. Thereafter, the operation handle 12 is pulled out of the main body case 1. In the illustrated embodiment, the main body case 1 is divided into a front-side member 1A formed by die-casting and a rear-side member 1B formed by press working, and the front-side member 1A is formed. A cylindrical bearing portion 19 in which the front half of the locking shaft 2 is rotatably housed and supported is formed in the center of the rear surface of the rear surface. The head 9 of the locking shaft 2 is formed to have a larger diameter than the main part, and is rotatably fitted in a large-diameter hole 20 of the cylindrical bearing 19. The rear side member 1B of the main body case 1 has a blocking wall portion 16 and a blocking wall portion 17 arranged at an opening angle of 90 degrees, and a mounting plate portion 21 is formed at the front end of the blocking wall portion 16 at a right angle. A stop wall 15 is formed at the rear end of the stop wall 16 at a right angle. A support wall 22 is provided at the tip of the blocking wall 17.
Are formed at right angles, and the mounting plate 2 is attached to the front end of the support wall 22.
3 are formed at right angles. The cylindrical bearing 19 of the front side member 1A is housed between the restraining wall 16, the blocking wall 17, and the supporting wall 22. The screw shaft portion 6 is constituted by the rear half portion of the locking shaft 2, and the small diameter shaft portion 24 formed at the tip of the screw shaft portion 6 is rotatable in the shaft hole 25 of the stop wall portion 15 of the rear side member 1B. It is inserted in. A retaining C-ring 27 is fitted in the annular receiving groove 26 at the protruding end of the small-diameter shaft portion 24, thereby preventing the locking shaft 2 from moving in the axial direction. The mounting plate portions 21 and 23 of the rear side member 1B are
It is fitted and fixed in the rear recess 28 of the front side member 1A, and an insertion hole 29 for a fixing screw is formed therethrough. The compression coil spring 10 is fitted to the front half of the locking shaft 2 and is housed in a cylindrical bearing 19. In this embodiment, the key recess 14 of the operation handle 12 and the key projection 11 of the locking shaft 2 are formed in a delta shape with three rounded corners, but this shape is not limited to this. is not. In this embodiment, the main body case 1 is divided into a front-side member 1A formed by die-casting and a rear-side member 1B formed by press working, and the portion to be die-casted is reduced as much as possible. The manufacturing cost of the entire case 1 can be reduced. As described above, in the tightening and locking device according to the present invention, the locking shaft 2 is mounted on the main body case 1 fixed to one of the objects A, and the locking shaft 2 is engaged with the metal receiving portion 8 of the other object B. The stopper plate 3 to be removed is screwed into the screw shaft portion 6 of the locking shaft 2 at the screw hole 5 of the base end portion 4, and the stopper plate 3 is compressed by a compression coil spring 10.
The lock shaft 2 is held in an interlocking state, the key concave portion 14 of the operation handle 12 is fitted to the key convex portion 11 of the head 9 of the lock shaft 2, the lock shaft 2 is rotated forward and reverse, and the stopper plate 3 is moved. Body case 1
Is rotated until it comes into contact with the stop wall 16 or the stop wall 17, and then the stopper plate 3 is moved to the stop wall 16 or the stop wall 1.
7, the back end 7 of the locking plate 3 is disengaged from the metal receiving portion 8 of the other object B by moving the locking shaft 2 in the axial direction. Are locked together as tightly as necessary. In addition, even though the structure is simplified as described above, when the fastening lock is performed or released, the rotated stopper plate 3 holds the side surfaces 4a and 4b of the base end portion 4 to stop the main body case 1. Since it moves in the axial direction of the locking shaft 2 after colliding with the wall portion 16 or the blocking wall portion 17, the operator can clearly distinguish between the locked state and the unlocked state by the feel at the time of the collision. In addition, there is no danger that the stopper plate 3 and the receiving part 8 are left in a semi-locked state where they are not sufficiently and sufficiently engaged. Furthermore, the key projection 1 of the head 9 of the locking shaft 2
1 is formed so as to be lower than the front surface level of the main body case 1.
Since the lock shaft 2 is rotated by fitting the key recesses 14 on the front end surface of the object A, there is a low risk that the fastening lock will be released without permission due to mischief by a person other than an authorized person.
Alternatively, the opening / closing management of the object B can be performed accurately.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a fastening lock device according to an embodiment of the present invention. FIG. 2 is a bottom view of the fastening lock device of FIG. 1; FIG. 3 is a right side view of the fastening lock device of FIG. 1; FIG. 4 is a bottom view of an operation handle used in the fastening lock device of FIG. 1; FIG. 5 is a rear view of the operation handle of FIG. 4; FIG. 6 is a sectional view taken along line AA of FIG. 1; FIG. 7 is an exploded perspective view of the tightening lock device of FIG. 1; DESCRIPTION OF SYMBOLS 1 Body case 2 Locking shaft 3 Stopper plate 5 Screw hole 6 Screw shaft portion 8 Receiving portion 10 Compression coil spring 11 Key convex portion 12 Operating handle 14 Key concave portion 15 Stop wall portion 16 Stop wall portion 17 Blocking wall Part 18 opening

Claims (1)

Claims 1. Two objects A and B which are mutually locked and locked.
And a locking shaft 2 that is rotatably mounted on the main body case 1 with its central axis arranged in the front-rear direction of the main body case 1 and is prevented from moving in the axial direction. The base end portion 4 is accommodated in the main body case 1 and the base end portion 4 is accommodated therein.
At the screw hole 5 of the locking shaft 2 is screwed,
The stopper plate 3 whose distal end 7 is engaged with and disengaged from the metal receiving portion 8 on the other object A side, is mounted between the head 9 of the locking shaft 2 and the base end portion 4 of the stopper plate 3. A compression coil spring 10 for holding the lock shaft 2 in an interlocked state with the lock shaft 2, and a key recess 11 fitted on a key protrusion 11 formed on the front surface of the head 9 of the lock shaft 2 so as to be lower than the front surface of the main body case 1. 14 comprises an operating handle 12 formed on the distal end surface of the shaft portion 13, and when the distal end portion 4 of the stopper plate 3 is in the unlocking position that does not collide with the receiving portion 8,
A stop wall 15 with which the base end portion 4 of the stopper plate 3 abuts is formed at the distal end portion of the main body case 1, and when the lock shaft 2 is rotated in one specific direction, the base end portion 4 of the stopper plate 3 is formed. A blocking wall portion 16 with which one side surface 4a abuts is formed on a side surface portion of the main body case 1 in parallel with the locking shaft 2, and when the locking shaft 2 is rotated in a direction opposite to the one direction, the locking plate 3 A blocking wall portion 17 against which the other side surface 4b of the base end portion 4 abuts is formed on the side surface portion of the main body case 1 in parallel with the locking shaft 2, and the stopper plate 3 moves in the front-rear direction and rotates forward and backward within a specific angle. A locking device in which an opening 18 is formed in the main body case 1.