JPS5916627B2 - Lock cylinder for safety lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a cylinder case, a cylinder core, and a locking device arranged by an insert key formed as a core pin and a case pin and inserted into a keyway. The present invention relates to a safety locking cylinder in which each row of case pins is supported together with their pin springs in individual chambers provided in recesses of the cylinder case.

In cylinder locks with locking cylinders of conventional construction, the cylinder case and the cylinder core have a guide groove drilled therein for the pin tightening device.

The manufacture of such safety locks requires high precision in order for the individual case pins and center pins to work together flawlessly.

It is also known from West German Patent No. 551,304 to arrange case pins together with their springs in individual chambers, in which case pins are inserted into holes in the cylinder case during assembly and then radially pushed out. It is inserted into the recess of the cylinder case while being pressed in the corresponding recess.

However, this structure also requires high precision.

In order to streamline the manufacturing of locking cylinders, research has been done on forming the cylinder case and cylinder core in many parts, for example dividing them in the longitudinal direction, so that each part can be manufactured by pressing or casting methods. can be done.

However, experience has shown that it is almost impossible to meet the safety requirements in an assembled locking cylinder, since during assembly the tolerances of the individual parts lead to high deviations from the set values.

This is manifested in this case by the tightening of the cylinder core and by the high resistance when inserting and withdrawing the key.

The object of the invention is to design a locking cylinder of the type mentioned at the outset in such a way that, on the one hand, it allows large manufacturing tolerances, which brings about manufacturing technology advantages, and on the other hand provides maximum safety and ease of operation. .

According to the invention, this task is solved by the fact that the individual chambers are formed as axially movable slides in the longitudinal grooves of the cylinder case, in which the case pins with springs are guided in the holes, and the slide is solved by floating in the longitudinal groove with axial play.

This achieves that with an axial play of the slider of about 0.2 to 0.3 mm, the slider is centered by withdrawal of the centering pin when the key is inserted.

The cylinder core can then be rotated very easily without being held stationary.

An advantageous embodiment of the invention provides that at least one center pin-case pin pair has, on its mutually contacting end faces, conical or bulbous protrusions that engage with each other in the locking and opening positions of the cylinder core. It is equipped with a corresponding recess.

The alignment of the centering pin on the slider, ie the alignment effect, can thereby be considerably improved.

Furthermore, it has the advantage that the withdrawal position of the key is clearly detectable by the engagement in the corresponding recess of the conical projection.

In order to be able to selectively incorporate multiple rows or only one row of case pins in a cylinder case with multiple flutes, it is possible to install multiple rows or only one row of case pins for the purpose if one or more flutes are closed by a holeless insert. Matching.

The same cylinder case can be used for different lock types without modification.

In order to maintain the radial play of the cylinder core within the cylinder case, the slider is provided with preloaded spring means,
It is suitable for this purpose, for example, if it is pressed against the cylinder core by a curved leaf spring.

Yet another embodiment of the invention is such that the centering pins within the various sliders are located within the cylinder core.

This has the great advantage that the slider only needs to be replaced when the hole shape for the main tightening pin changes.

The cylinder case and cylinder core remain unchanged and can therefore be stored as a finished product.

Different hole shapes can only be installed in the replaceable slider, which offers clear economic advantages.

A further advantage of the described construction is that the relatively small slider can be easily made rigid in contrast to the cylinder case and cylinder core where the holes are directly provided.

This makes it impossible for unauthorized persons to drill the lock.

The details of the present invention will be explained with reference to embodiments shown in the figures.

1 and 2 show a locking cylinder having a cylinder case 1 and a cylinder core 2. FIG.

The cylinder case 1 has four vertical grooves (longitudinal grooves) 3a.
, 3b, 3c, and 3d.

This longitudinal groove is opened at the left front side of the cylinder case 1 in FIG. 1, or is closed later by the attached case 4.

The longitudinal groove ends slightly in front of the right front of the cylinder case 1.

A slider 5 having holes is inserted into the vertical grooves 3a, 3b, and 3d, and a pin spring 7 and a case pin 8 are arranged in the holes.

The slider 5 is slidable in the axial direction within the vertical grooves 3a, 3b, and 3d, and is inserted with a play S of approximately 0.2 to 3 m11L.

In FIG. 1, the slider 5 is shown precisely aligned, so that the slider 5 has a play of 1/2 s on each side within the cylinder case.

A core pin 10 is inserted into a hole 9 bored in the cylinder core 2 in a known manner, and the core pin 10 is tapered conically on the inside.

The conical point likewise cooperates in a known manner with a shallow hole in the key 11 (see FIGS. 3 and 4).

Two pins 10' from the five core pins shown in FIG. 1 are shown in a conventional manner.

The front surfaces of the core pin 10' and the attached case pin 8' which contact each other are simply punched out into a circular shape.

On the other hand, the three case pins 8 have truncated conical projections 8.
a (see also Figures 3 and 4).

The center pin 10, which cooperates with the case pin 8, has a corresponding frusto-conical recess 10a (see also FIG. 3).

The engagement of the projection 8a into the recess 10a produces a centering effect on the associated pin pair and thereby also on the slider 5.

Of course, a recess can be arranged on the case pin and a protrusion on the center pin, and the protrusion and the recess can be arranged in another way.
For example, when the front surfaces of a pair of pins are engaged, an alignment action occurs, and when the cylinder center rotates, the engaging portions, that is, the protrusions 8as and the recesses 10a, are formed in a spherical shape in which it is only essential that they are automatically pushed apart. be able to.

The opening angle of the protrusion 8a or the recess 10a must be large so that automatic locking cannot occur.

Figures 1 and 2 show the locking cylinder in the locked position.

By inserting the insert key 11 (FIGS. 3 and 4), the cylinder core is unlocked in a known manner.

Upon insertion of the key 11, the slider 5 is moved towards the inside of the lock, so that the entire play S is on the outside of the cylinder case.

Nevertheless, the cylinder core 2 is slightly rotated by the key 11, as shown in FIG.

When the key is pulled out, the slider 5 is moved to the right by a play S.

However, as soon as the key is completely withdrawn from the keyway 12, the pin pair with the protrusion 8a and the quadrant 10a is recentered, so that the slider is free from the case pins 8, 8'.
is moved into the position shown in FIG. 1 where it can engage the center pin hole 9.

The slider is thus automatically aligned with the position of the bore 9 in the cylinder center, thereby ensuring the existing manufacturing tolerances.

FIG. 5 shows a partially cutaway view of an embodiment of a locking cylinder in which a leaf spring 13 curved in cross section is inserted between the outside of the slider 5 and the base of the longitudinal groove 3d.

This leaf spring presses the slider 5 radially against the cylinder center and thereby eliminates any radial play that may be present depending on the engagement.

It is also possible to press the slider against the cylinder core by other types of springs, for example coil springs.

FIG. 6 shows a locking cylinder core 2 with one row of locking pins.

This cylindrical core is provided with an inserted slider 14 for a core pin (not shown).

Such a cylinder core can also be equipped with multiple sliders 14.

This described structure allows that both the cylinder case 1 and the cylinder core 2 can be stored completed.

Sliders 5, 14 with different hole shapes can then be inserted as required.

If the cylinder case according to FIGS. 1 and 2 is to be equipped with one or two rows of pins, inserts 15 without holes may be inserted into the unused longitudinal grooves.

As mentioned above, the embodiment in which the cylinder core 2 with the inserted slider is equipped with a core pin means that the sliders 5 and 14 with different hole geometries have to be integrated into the individual locking cylinders, while the remaining This allows the most rational production of the locking cylinder, since the locking element can always be formed and stored the same.

Furthermore, the production of the locking cylinder, specifically the production of the locking device, can be streamlined in other ways.

A locking device refers to a number of locks or locking cylinders combined in a certain combination technique, the locks of which are programmed sequences of functions.

Such locking devices require a key that is compatible with every lock, while other keys require keys that can be activated only in certain groups or only for individual locks.

The locking device can be constructed by omitting a locking pin pair in a defined position, which has to be verified in a complex calculation.

The installation of such locking cylinders is very expensive.

In the past, the omission of each individual hole in a cylinder with holes for the main tightening pins meant that the individual pins and the corresponding pins had to be packed separately.

In order to be able to use the prefabricated slider 5, which is packed with a case pin 8, for the locking device in the corresponding case 1, the cylinder core 2 according to FIG. Corresponding to the function provided, the individual pin holes 9 are omitted and are likewise not drilled.

The case pin 8 corresponding to that case is not effective.

First, in order to avoid the fact that the cylinder core 2 must be provided with an essential pin hole before installation, the cylinder core 2 is always provided with a pin hole 9 during manufacturing, and the pin hole 9 that has not been used before is installed. It is advantageous to close with blind bolts.

Such a blind bolt properly closes the pin hole 9 on the core surface and has no internal point, so that it does not protrude into the keyway 12.

In this way, it is also possible to store the drilled cylinder core and to adapt the installation to the calculated function by simple insertion of blind bolts.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the lock cylinder without a key, Figure 2 is a cross-sectional view of the lock cylinder shown in Figure 1, and Figure 3 is a vertical cross-section of the lock cylinder with a key inserted. Figure 4 is a cross-sectional view of the lock cylinder shown in Figure 3 with the key rotated by 45 degrees, Figure 5 is a partial cross-section of another embodiment of the lock cylinder, and Figure 6 is a slider for the core pin. FIG. 1...Cylinder case, 2...Cylinder core, 3a, 3b, 3c, 3d...
...Vertical groove, 5...Slider, 6...
Hole, 7... Spring, 8... Case pin,
10... Heart pin, 11... Key, S...
····play.

Claims (1)

[Scope of Claims] 1. A cylinder case, a cylinder center, and a locking device arranged by an insertion key formed as a center pin and a case pin and inserted into a key groove, in which cases of each row are provided. A locking cylinder for a safety lock in which the pins together with their pin springs are supported in individual chambers provided in recesses of said cylinder case, said lateral chambers being able to move axially into longitudinal grooves of said cylinder case. characterized in that it is formed as a slider, in which the case pin with a spring is guided in the hole, and the slider is located floating in the longitudinal groove with axial play. A locking cylinder for safety locks. 2. At least one center pin-case pin pair is provided with a conical or ball-shaped protrusion or a corresponding recess on the end surface in contact with each other, which engage with each other in the locked and open positions of the cylinder core. A locking cylinder for a safety lock according to claim 1. 3. The locking cylinder for a safety lock according to claim 1, wherein one or more longitudinal grooves of the cylinder case are closed by a holeless insert. 4. The locking cylinder for a safety lock according to claim 1, wherein the slider is radially pressed against the cylinder center by a preloaded spring means. 5. The locking cylinder for a safety lock according to claim 4, wherein the spring means is a curved leaf spring supported at the base of the longitudinal groove and outside the inserted slider. . 6. A locking cylinder O for a safety lock according to claim 1, characterized in that the core pin in each slider is arranged in the center direction of the cylinder.I. The lock cylinder for a safety lock according to claim 1, characterized in that the hole is closed by a blind pin that completely closes the hole from the outside.