JPS6214290Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a cylinder that allows rotation of the inner cylinder by aligning the shear line of the inner and outer cylinders with the boundary between the pins by inserting a key, and is particularly aimed at improving the connection structure with the dead bolt drive hub. It is related to.

As is well known, the dead bolt is moved in and out by a thumb turn operation from the indoor side, and by rotating the dead bolt drive hub from the outdoor side by operating the cylinder. In a structure in which the tail passes through the hub hole of the dead bolt drive hub and is led out to the indoor side, and a thumb turn is connected to the end of the tail, the cylinder tail will not move even if the inner cylinder of the cylinder is in a non-rotating state during thumb turn operation. It is necessary to be able to independently rotate the dead bolt drive hub.

Therefore, conventionally, as shown in FIG. 5, a cylindrical joint fitting 13 having a small protrusion 12 formed in the end opening 11 is provided and fixed to the rear end of the inner cylinder, and a cylinder tail 15 fixed to the retaining plate 14.
By leading out from the opening 11, it is possible to rotate following the inner cylinder, and when operating the thumb turn, it can rotate clockwise and counterclockwise until it is regulated by the small protrusion 12 regardless of the inner cylinder. It had a structure in which it was held rotatably.

However, the above-mentioned joint fitting 13 has disadvantages in that it is relatively expensive to manufacture and is relatively cumbersome in terms of workability for attaching the cylinder tail to the rear end of the inner cylinder.

Therefore, the purpose of this invention is to achieve the same function without using the joint metal fittings mentioned above, thereby reducing the cost of the cylinder and improving workability.

In accordance with this purpose, the cylinder of this invention has a split groove formed in the rear end of the inner cylinder and a support shaft mounted thereon.
The cylinder tail is pivotally supported in the through hole into which this support shaft loosely fits, and therefore, the cylinder tail can be rotated clockwise and counterclockwise around its own longitudinal center axis within the interval between the split grooves. It was possible to achieve the same functions as the conventional one with an extremely simple structure.

Details will be further described below with reference to embodiments shown in the accompanying drawings.

In the drawings, reference numeral 1 indicates a cylinder outer cylinder, in which an inner cylinder 3 having a keyway 2 is rotatably held. 4 is a pin inserted from the outer cylinder 1 to the inner cylinder 3, and as is well known, when the key is not in use, it crosses the shear line L between the outer cylinder and the inner cylinder and prevents the inner cylinder from rotating. When inserting the key, the boundary between the pins and the sear line L are aligned to allow the inner cylinder to rotate. 5 is a cylinder spring, 6 is a cover, and 7 is a retaining ring. A split groove 8 is formed in the rear end portion 3a of the inner cylinder, and a support shaft 9 is mounted therein. Reference numeral 10 denotes a cylinder tail, which has a through hole 10a formed at its end, and is loosely fitted and connected to the support shaft 9 in the through hole 10a, and as shown in FIG. It is rotatable clockwise and counterclockwise about the central longitudinal axis of the tail itself.

Therefore, when installing the lock body, the cylinder tail 10 is inserted into the hub hole of the dead bolt driving hub in the fourth position.
If it is inserted in the state indicated by the dashed line in the figure and a thumb turn is connected to the end, the dead bolt can be inserted while the inner cylinder is rotated from state A to state B when the cylinder is locked. Make it stand out,
Return only the inner cylinder 3 to its old state and remove the key. When unlocking, just do the opposite operation. Furthermore, when locking is performed from the inside of the room by a thumb turn operation, only the cylinder tail 10 is rotated from the position A to the position B in Fig. 4, during which time the dead bolt is protruded, and the dead bolt is retracted by the reverse operation. .

Furthermore, as shown in Fig. 3, the support shaft 9 is connected from the bottom of the groove.
distance d ₁ and the through hole 1 of the cylinder tail 10
If the difference between the distance d ₂ from the edge of 0a to the rear edge 10b is made as small as possible and the through hole 10a is made into a square hole shape, the cylinder tail 10 will rotate around the support shaft 9 as shown by the arrow. It is convenient to attach to the lock body.

As is clear from the explanation based on the examples above,
The cylinder according to this invention does not use joint fittings with a relatively complicated structure as in the past.
A similar function could be achieved simply by loosely fitting a through hole into the support shaft within the split groove at the rear end of the inner cylinder, making it inexpensive to manufacture, easy to assemble, and extremely practical. It was possible to provide a cylinder rich in

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the cylinder according to this invention, FIG. 2 is a rear view of the same,
Fig. 3 is a side view of the main part showing the connection state between the cylinder tail and the rear end of the inner cylinder, Fig. 4 is a rear view of the main part showing the movement of the cylinder tail, and Fig. 5 shows the conventional cylinder structure. FIG. 6 is a partially cutaway side view, FIG. 6 is a rear view of the same, and FIG. 7 is a perspective view of the joint fitting. 1... Outer cylinder, 3... Inner cylinder, 3a... Rear end of inner cylinder, 4... Pin, 8... Division groove, 9... Support shaft, 10
...Cylinder tail, 10a...Through hole.

Claims (1)

[Scope of utility model registration request] In a cylinder that allows the inner cylinder to rotate by aligning the shear line of the inner and outer cylinders with the boundary between the pins by inserting a key, a spindle is mounted in the split groove at the rear end of the inner cylinder, and the hub hole of the dead bolt drive hub is installed. A cylinder tail to be fitted into the shaft is loosely fitted into the support shaft through a through hole formed at its end, and the cylinder tail is rotated clockwise and counterclockwise around its own longitudinal center axis within the interval of the split groove. A movably held cylinder.