JPS6242059Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lock in which the mounting screws exposed on the front surface of the lock are concealed to improve its appearance and to enhance its ability to protect against sabotage from inside and outside.

Conventionally, some of these types of locks have been used from a security perspective to prevent burglars from entering or exiting the building.
A double-sided cylinder is known as a cylinder that increases its defensive ability. This double-sided cylinder, for example, as shown in FIGS. 1 and 2,
A pair of cylinder bodies 3 including a piston 1 that rotates by key operation, a connecting lock 2 that is connected to the piston 1 and rotates together with the piston 1, and a cylinder ring that accommodates each cylinder body 3 inside. 4 and the tip of the connecting lock 2 into the opening 5
A main lock 8 is provided with a rotating cam 6 that rotates in conjunction with the operation of the receiving connecting lock 2, and a cam mechanism for operating the bar rod 7 in and out in conjunction with the rotating cam 6.
It was composed of.

Then, the cylinder main body 3 disposed opposite to both sides of the main lock 8 inserts the fixing rod 9 attached to the cylinder main body 3 into the through hole 9' formed in the main lock 8. On the female thread 10 formed at the tip,
It was fixed by screwing together a mounting screw 11 inserted from the front of the cylinder body 1.

Therefore, even if a thief who infiltrates the inside or outside of the building sabotages the building to remove the mounting screws 11 and removes either the inside or outside mounting screws 11, the other mounting screw 11 will still fix both cylinder bodies 3. Therefore, in order to remove this other mounting screw 11, it is necessary to move to the inside or outside of the building and sabotage it.
It had excellent defensive capabilities in that it took a long time to sabotage it.

However, when this conventional double-sided cylinder is attached to the door body 12, for example, the head of the attachment screw 11 is attached to the cylinder body 12, as shown in FIG.
Because it was exposed in front of the building, there was a fear that it would not only be in poor physical condition, but also that it would suggest targets for sabotage to robbers who invaded the building. It was hot.

It is an object of the present invention to provide a lock that eliminates these conventional drawbacks, improves the appearance of the lock after it is installed with a simple structure, and further enhances its defensive ability.

Therefore, in the lock of the present invention, a front plate having a diameter larger than the circumferential surface of the convex portion is provided at the end of the body having a plurality of convex portions on the circumferential surface, and is located concentrically with the circumferential surface of the convex portion. A cylinder body having a piston with a key hole protruding from the face plate and a screw hole formed therein, and a cylinder ring that houses the cylinder body inside, and the front plate can be housed and seated in the front part of the ring. In a lock having a recessed hole and a seat surface, a centering washer is provided that is attached to the circumferential surface of the convex part and that can fit into the recessed hole, and this washer is inserted between the front plate and the seat surface. A gap of equal width is formed between the circumferential surface of the front plate and the inner circumferential surface of the recessed hole, and a cylinder cap that can hide the surface of the front plate and has a flange on the periphery that can be fitted into this gap is provided. , a through hole capable of accommodating the piston is opened in the cap, a flange is formed on the periphery of the opening that can be brought into close contact with the circumferential surface of the protrusion of the piston, and the cap is attached to the back surface of the cap via a double-sided adhesive tape. It is characterized by being attached to the front panel surface.

Hereinafter, an illustrated embodiment in which the present invention is applied to a double-sided cylinder will be described. Roughly speaking, this double-sided cylinder includes a cylinder body 13 and a cylinder ring 1 that accommodates the cylinder body 13 inside.
4, and a main lock 16 for moving the bar rod 15 in and out by operating a key on the cylinder body 13.

The cylinder body 13 is integrally molded with zinc or brass alloy die-casting, for example, and has a substantially cylindrical body 18 with a plurality of convex portions 17 formed on the outer circumferential surface.
and a substantially disc-shaped front plate 19 that is protruded from an eccentric position of the axial end of the body 18, and an inscribed circle in contact with the circumferential surface of the plurality of convex portions 17 is concentric with the front plate 19, A piston 21 having a keyhole 20 is rotatably inserted into the center of the body 18. Further, among a pair of convex portions 17 arranged in the diametrical direction of the body portion 18, a screw hole 22 is formed penetrating through one convex portion 17, and the other convex portion 17 has a female screw hole 22 from its rear side. (not shown) are formed, and the mounting screws 23 can be inserted into these screw holes 22, and the male threads 25 of the fixing rod 24 can be screwed into the female threads. Reference numeral 26 indicates a counterbore surface of the screw hole 22 opened in the front plate 19, and 27 indicates a known fixing fitting attached to the rear end of the piston 21, to which one end of the connecting lock 28 is swingably connected.

The cylinder ring 14 is formed in a substantially truncated cone shape, and has a recessed hole 29 and a seat surface 30 on which a centering washer (to be described later) is seated at the front thereof. A known lock is used as the main lock 16 in this embodiment, and the main lock case 31 has a rotating cam 3 having an opening 32 for receiving the tips of the connecting locks 28, 28.
3 is rotatably housed, and an engaging claw (not shown) integrated with this rotary cam 33 is connected to an end of a bar rod 15 housed in the main locking case 31.
The bar rod 15 is moved in and out in the axial direction in response to the operation. Reference numerals 34 and 34 denote through holes formed apart from each other in the axial direction of the main locking case 31, and the other end of the fixing rod 24, one end of which is fixed to the rear part of the cylinder body 13, is received in the through hole 34. 35 is a mounting bracket molded integrally with the main locking case 31, and screw holes 36 are formed at both longitudinal ends of the mounting bracket.
It can be installed on. Reference numeral 38 denotes a female thread formed at the end of the fixing rod 24 on the other side of the male thread 25, so that it can be screwed into the mounting screw 23.

39 is a ring-shaped centering washer whose outer diameter is slightly larger than the outer diameter of the front plate 19 of the cylinder body 13, and whose inner diameter is slightly larger than the outer diameter of the front plate 19 of the cylinder body 13.
When the centering washer 39 is accommodated in the seat surface 30 formed on the front part of the cylinder body 13, the centering washer 39 and the inner wall of the recessed hole 29, the center of the front plate 19 is set in the recessed hole 29 at a concentric position with the recessed hole 29, and the outer peripheral surface of the front plate 19 and the inner wall of the recessed hole 29 are aligned. The gap 40 formed between the two is set to have a uniform width.

Reference numeral 41 designates a substantially dish-shaped cylinder cap, and the front plate 19 is accommodated in a flange 42 formed on the periphery of the cylinder cap.
A through hole 43 is formed at a position eccentric from the center of the piston 21, and the front portion of the piston 21 is accommodated within a flange 44 formed around the opening. Therefore, the centering washer 39 functions to center the front plate 19 as well as center the piston 21 with respect to the through hole 43. In this case, in this embodiment, the through hole 43 of the cylinder cap 41 is formed at an eccentric position, but the position of the through hole 43 is not limited to this example, and the position of the through hole 43 can be adjusted in accordance with the mounting position of the piston 21 with respect to the cylinder body 13. It is assumed that it is formed at the center of the cap 41 or at an appropriate eccentric position. 45 is a rectangular double-sided adhesive tape that can be adhered to the back surface of the cylinder cap 41 and a part of the front plate 19, and 46 is a disc that matches the shape of the cylinder cap 41 and has a through hole 47 formed inside. The adhesive strength of the double-sided adhesive tape is strengthened by enlarging its adhesive surface and making it possible to adhere to the back surface of the cylinder cap 41 and the entire surface of the front plate 19. It is desirable that either of these double-sided adhesive tapes 45 or 46 be adhered to the back surface of the cylinder cap 41 in advance so that the release paper can be peeled off when the cylinder cap 41 is attached and the tape can be adhered to the front plate 19.

When attaching the lock configured in this way to the door body 37, for example, insert the main locking case 31 into a recessed hole (not shown) formed at a predetermined position of the door body 37,
After attaching the main lock 16 to the door body 37 by inserting a screw (not shown) into the through hole 36 formed in the mounting bracket 35, attach the piston 21, the fixing bracket 27, and the connecting lock 28, and then tighten the male screw 25. A centering washer 39 is fitted onto the outer circumferential surface of the convex portion of the cylinder body 13 to which the fixing rod 24 is attached via the centering washer 39, and the thus assembled cylinder body 13 is further loosely inserted into the cylinder ring 14 as shown in FIG. After inserting the cylinder body 13 into a mounting hole (not shown) formed at a predetermined position of the door body 37, and at this time, each fixing rod 24 is inserted into a through hole 34 formed in the main locking case 31. At the same time, connect lock 2
8 and 28 into the opening 32 of the rotary cam 33, and while maintaining this inserted state, insert the mounting screws 23 into the screw holes 22 from the front of each cylinder body 13 to fix the mounting screws 23. It may be screwed onto a female thread 38 formed at the tip of the rod 24.

In this case, the centering washer 39 attached to the cylinder body 13 is fixed in the seat surface 30 in the recessed hole 29, and due to the fitting action between its outer peripheral surface and the inner wall of the recessed hole 29, the centering washer 39 is attached to the front plate of the cylinder body 13. 19 is set in the recessed hole 29 at a concentric position with the recessed hole 29, and at the same time the piston 21 attached to the cylinder body 13 is also corrected in its mounting position,
A gap 40 of equal width is formed between the outer peripheral surface of the centering washer 39 and the inner wall of the recessed hole 29. Therefore,
After that, peel off the release paper of the double-sided adhesive tape 45 previously attached to the back surface of the cylinder cap 41, fit the cylinder cap 41 onto the outer periphery of the front plate 19, and insert the piston 2 from the inside of the through hole 47.
1 and attach the cylinder cap 41 to the front plate 19 through an adhesive layer of double-sided adhesive tape 45.
Once it is fixed in place, the series of installation work will be completed.

In this case, the front plate 1 of the cylinder cap 41
9 and piston 21,
As mentioned above, a gap 40 of equal width is formed between the concave hole 29 and the outer circumferential surface of the front plate 19, and the centering of the through hole 43 of the cylinder cap 41 and the piston 21 has already been done using the centering washer 39. Therefore, the cylinder cap 41 can be attached smoothly. Furthermore, by installing the cylinder cap 41, the heads of the mounting screws 23, which were exposed on the surface of the front plate 19, are hidden, as shown in FIGS. 6 and 8.
The appearance of the front surface of the lock is improved, and key points for sabotage are made unclear by concealing the mounting screws 23, and attack points can be dispersed, so that the defensive ability of the lock can be increased accordingly.

Furthermore, when installing the cylinder cap 41 as described above, it is possible to peel off the release paper of the double-sided adhesive tape 45 that has been previously attached to the back surface of the cylinder cap 41 in order to increase work efficiency, and to stack the tapes in a stacked manner. Flange 4 formed in the direction
Since the caps 41 are prevented from adhering to each other in steps 2 and 44, the above working method can be facilitated. Moreover, after the cap 41 is assembled, the flanges 42, 4
4 completely hides the front plate 19, and the edges of the flanges 42 and 44 cannot be seen from the outside, which suggests a sabotage attack target compared to, for example, a case where the cap 41 is configured in a plate shape. There is no need to worry about being exposed, and the appearance can be improved accordingly.

When opening and closing the door using the double-sided cylinder configured in this way, the same operations as conventional ones are performed. That is, when closing and locking the door body 37, a predetermined key (not shown) is inserted into the key hole 20 of the piston 21, and the piston 2
1, the connecting lock 28 connected to the piston 21 is interlocked with the movement of the piston 21, and the rotating cam 33, which receives the tip of the connecting lock 28 in the opening 32, is rotated in the same direction as described above. Rotating cam 3
The engaging pawl integrated with 3 engages with the cam mechanism linked to the end of the bar rod 15, and the bar rod 15 protrudes and enters the recess (not shown) in the other door body, resulting in the locked state. is set, and the other lock of the door body 37 is also set to the locked state at the same time.

Next, when unlocking the door body 37, by rotating the key in the unlocking direction, each of the above-mentioned components operates in the opposite direction, and the bolt 15 is retracted in the axial direction. Ru.

As described above, the lock of the present invention is provided with a front plate having a diameter larger than the circumferential surface of the convex portions at the end of the body having a plurality of convex portions formed on the circumferential surface thereof, at a position concentric with the circumferential surface of the convex portions. It includes a cylinder body in which a piston with a key hole protrudes from the front plate and a screw hole is formed, and a cylinder ring that accommodates the cylinder body inside,
The lock has a seat surface and a recessed hole in which the front plate can be accommodated and seated in the front part of the ring, and a centering washer that is attached to the circumferential surface of the convex part and that can be fitted into the recessed hole is provided. This washer is inserted between the front plate and the seat surface to form a gap of equal width between the front plate circumferential surface and the inner circumferential surface of the recessed hole, and a flange that can be fitted into this gap is inserted. A cylinder cap capable of concealing the surface of the front plate formed on the periphery is provided, a through hole capable of accommodating the piston is opened in the cap, and a flange is formed on the periphery of the opening that can be brought into close contact with the periphery of the protrusion of the piston. However, since the cap is attached to the surface of the front plate through the double-sided adhesive tape pasted on the back side, the cylinder cap can be attached easily and with good physical strength, and the structure is extremely simple, so it can be used with existing locks. It has the effect of being easily adaptable to modifications.

In addition, since the cylinder cap hides the front plate surface except for the front end of the piston, it is possible to hide the mounting screws that are installed in the screw holes, improving the appearance, and also concealing the attack target in sabotage operations. By doing so, you can improve your defensive ability. Moreover, by fitting the flange formed on the periphery of the cap into the gap, and arranging the flange formed on the periphery of the through hole closely to the periphery of the protrusion of the piston, the edges of these flanges can be visually recognized from the outside. This has the practical effect of avoiding the reduction in defensive ability that would occur if the cap were configured in a plate shape.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the conventional example, Fig. 2 is a front view showing the state of the front part of the conventional example after installation,
Fig. 3 is an exploded perspective view of an embodiment of the present invention, Fig. 4 is an exploded perspective view of an example of the cylinder body used in the invention, and Fig. 5 is a cylinder used in the invention. FIG. 6 is a perspective view showing an example of the cap, FIG.
8 is an enlarged cross-sectional side view taken along line A-A' in FIG. 6, and FIG. 8 is an enlarged cross-sectional plan view taken along line B-B' in FIG. 13...Cylinder body, 23...Mounting screw, 41...Cylinder cap, 45, 46...
...Double-sided adhesive tape, 49...Groove, 50...Protrusion.

Claims (1)

[Scope of utility model registration request] A front plate having a larger diameter than the circumferential surface of the convex portion is provided at the end of the body having a plurality of convex portions formed on the circumferential surface thereof, and is located concentrically with the circumferential surface of the convex portion, and a piston having a key hole is protruded from the front plate. A lock comprising a cylinder body with screw holes formed therein, and a cylinder ring housing the cylinder body inside, the ring having a recessed hole and a seating surface in the front part of the ring to accommodate the front plate and to allow seating. A centering washer is provided that is attached to the circumferential surface of the convex portion and can be fitted into the concave hole, and this washer is inserted between the front plate and the seat surface so that the circumferential surface of the front plate and the concave hole are aligned. A gap of equal width is formed between the cylinder cap and the inner circumferential surface, and a cylinder cap that can hide the surface of the front plate is provided with a flange on the periphery that can fit into the gap, and the piston can be accommodated in the cap. A through hole is opened, and a flange is formed on the periphery of the opening so that it can be brought into close contact with the circumferential surface of the protrusion of the piston, and the cap is attached to the surface of the front plate via double-sided adhesive tape affixed to the back surface of the cap. A lock that is characterized by a