EP4288627A1

EP4288627A1 - Lock body, pin lock and command device

Info

Publication number: EP4288627A1
Application number: EP22710084.9A
Authority: EP
Inventors: Christian Baumann; Jean Jacques Faurie
Original assignee: Siemens AG
Current assignee: Siemens AG
Priority date: 2021-03-08
Filing date: 2022-03-03
Publication date: 2023-12-13
Also published as: DE102021202192A1; CN116964291A; US20240167296A1; WO2022189259A1

Abstract

The lock body (10) according to the invention for a pin lock is of multipart design and has a main body (11) and a divider (12), mounted on the main body (11), with a plurality of bores (13) for receiving springs and locking pins. The mechanical division of the lock body (10) into the main body (11) and the divider (12) allows simpler and more cost-effective production since the lock body (10) no longer needs to be complicatedly machined out of a solid material, for example brass, but rather more cost-effective production methods can be used.

Description

description

Lock body, pin lock and command device

The invention relates to a lock body for a pin lock, for example a cylinder lock or a drilled hole lock. Furthermore, the invention relates to a pin lock with such a lock body and a command device, such as a pushbutton or selector switch, for a machine or electrical system, with such a pin lock.

A pin lock essentially consists of a lock body and a cylinder that can be rotated in a hole in the lock body. The cylinder has a number of radial bores, which lie in a radial plane of the cylinder, end on the circumference of the cylinder and open into a key channel. In the lock body of the pin lock, a number of bores are arranged corresponding to the radial bores, which in a predefined angular position of the cylinder each form an extension of the radial bores in the cylinder. Locking pins - lock body pins and cylinder pins - are accommodated in these holes in the lock body and cylinder, which are pressed in the direction of the cylinder by springs. The length of the individual pins is dimensioned in such a way that when a coded key is inserted into the keyway in the predefined angular position, the contact surfaces of the cylinder pins and the corresponding lock body pins are in the lateral surface of the cylinder. The basic structure of such a pin lock is known, for example, from US Pat. No. 1,593,513.

Such pin locks can be used for a wide variety of applications. Some applications use pin locks to lock different settings or positions, for example of a mechanism or a switch. by removing the key to secure against intentional or unintentional adjustment of the relevant position. For these applications, it is therefore necessary for the key to be able to be removed under different, predefined angular positions. In order to implement several of the key withdrawal positions, ie several predefined angular positions of the cylinder under which the key can be withdrawn, several rows of radial bores are required in the lock body or in the cylinder to accommodate pins and springs. The production of such a lock body, which is usually done as a turned or drilled part, preferably made of brass, designed - in particular for applications with several key withdrawal positions - as comparatively complex.

It is therefore the object of the present invention to provide an alternative lock body, a corresponding pin lock and a corresponding command device, which are characterized by simplified—and thus more cost-effective—production.

This object is achieved according to the invention by the lock body, the pin lock and the command device according to the independent claims. Advantageous configurations of the lock body according to the invention, the pin lock and the command device are the subject matter of the dependent claims.

The lock body according to the invention for a pin lock is designed in several parts and has a base body and a compartment mounted on the base body with a plurality of bores for accommodating springs and locking pins.

The mechanical division of the lock body into the base body and compartments enables simpler and more cost-effective production, since the lock body no longer has to be laboriously worked out of a solid material, such as brass, but instead whose more cost-effective manufacturing processes can be used.

In an advantageous development of the lock body, the compartment can be connected to the base body by displacement in a longitudinal direction.

For assembly on the base body, the compartment is pushed onto the base body in the longitudinal direction, which corresponds to the direction in which the key is removed from the pin lock, for example by means of a dovetail guide or the like. The final position of the compartment on the base body can be fixed by a snap-in connection.

In a further advantageous development of the lock body, the compartment has at least two rows of bores.

The holes in a row of holes are arranged one behind the other in the longitudinal direction; the individual rows of bores are arranged offset in relation to one another in the circumferential direction in predefined angular positions. Each of the at least two rows of holes serves to realize a separate key removal position.

In a further advantageous development of the lock body, the base body and the partition are made of different chemical materials.

This results in the advantage that the materials used for the individual components can be adapted to the mechanical requirements of the respective component - for example hardness, toughness, abrasion resistance, etc. Metals and metal alloys as well as plastics can be considered as materials for the lock body and the partition. In a further advantageous development of the lock body, the base body and/or the compartment can be produced using injection molding or an additive manufacturing process.

The production of the lock body using a metal or plastic injection molding process or with the help of an additive manufacturing process is different from the conventional production process in which the lock body is machined from a solid blank using abrasive processes such as drilling, milling, etc. This represents a considerable cost advantage, especially in the case of larger quantities. The types of process - both injection molding processes and additive manufacturing processes - can be used for both metallic and non-metallic materials, such as plastics or synthetic resins.

In a further advantageous development, the lock body has a tubular design, with the compartment being designed as a ring sector of the tubular lock body.

The term “ring sector” means a peripheral section of the tubular lock body. Both the compartment and the base body can be designed as a ring sector.

In a further advantageous development of the lock body, the base body is also designed as a ring sector.

In a further advantageous development, the lock body has a sleeve which encloses the base body and the compartment at least in sections.

Since the sleeve encloses the compartment on the outside to the outside, the bores arranged in the compartment for receiving the springs and locking pins can be designed as through-holes. Those to be carried out from the inside Blind holes can thus be replaced by through holes to be made from the outside. By changing the machining side (from the inside to the outside), it is also possible to drill several rows of holes in parallel, which was previously not possible due to tool collisions. The manufacturing costs can be further reduced as a result.

In a further advantageous development of the lock body, the sleeve is connected in one piece to the base body.

In particular when using an additive manufacturing process, the assembly work—and thus the manufacturing costs—can be further reduced by the one-piece design of the base body and sleeve.

The pin lock according to the invention has a multi-part lock body of the type described above and a lock core (4) accommodated in the lock body and mechanically coupled to it.

With regard to the advantages of the pin lock according to the invention, reference is made to the above statements on the advantages of the lock body according to the invention.

The command device according to the invention - for example a push button, key switch or selector switch - for a machine or electrical system has a pin lock with a multi-part lock body of the type described above and at least one contact element which can be contacted at a predefined angular position of the lock core (4). , on.

Control devices are used in machines or electrical systems and serve as control devices - for example as pushbuttons or selector switches - to influence the control of the machine or electrical system. That points to this Command device on one or more contact or switching elements, which are electrically connected to the control of the machine or electrical system. Such command devices are installed in control panels, control panels, control cabinet doors or housing covers of the machine or electrical system. The command device can be designed as a key switch, ie the command device has a mechanical lock, for example a pin lock, to lock the switch position of the command device by removing the key in order to prevent incorrect operation - for example during maintenance or repair work or unauthorized actuation of the control device, which would lead, for example, to the machine or electrical system being switched off without authorization. With regard to the further advantages of the command device according to the invention, reference is made to the above statements on the advantages of the pin lock according to the invention or of the lock body according to the invention.

An exemplary embodiment of the lock body according to the invention for a pin lock is explained in more detail below with reference to the attached figures. In the figures are:

characters

1 and 2 schematic representations of the basic structure of a pin lock;

characters

3 and 4 schematic representations of a lock body previously known from the prior art;

characters

5 to 7 schematic representations of the lock body according to the invention.

In the various figures of the drawing, the same parts are always provided with the same reference symbols. The description The exercise applies to all drawing figures in which the corresponding part can also be seen.

In the figures 1 and 2, the basic structure of a pin lock 1 is provided in different views schematically represents. FIG. 1 shows a perspective view of such a pin lock 1, and FIG. 2 shows a perspective sectional view of this. The pin lock 1 has a substantially cylindrical lock body 2 and a zy-cylindrical lock core 4, which is inserted and rotatably mounted in an axial central bore 3 running in a longitudinal direction L (see FIG. 3). The lock core 4 has a key channel 8 which runs in the longitudinal direction L and is used for inserting a key (not shown).

Furthermore, the lock body 2 has a plurality of radial bores 5 running in a radial direction R and arranged in rows. Several of these radial bores 5 arranged next to one another in the longitudinal direction L and spaced apart from one another are combined to form a row of bores 6 . Several rows of holes 6 are arranged side by side in a circumferential direction of the lock body 2 and are spaced apart from one another at a predefined distance. Through each of the rows of holes 6 a key withdrawal position of the pin lock 1 is set.

The radial bores 5 are running exactly radially to a central axis M of the lock body 2, which is also the central axis M of the lock core 4. The individual radial bores 5 go beyond the central axis M, penetrate the central bore 3 and each end as an associated blind bore 5-2 in the opposite cylinder wall of the lock body 2. Each of the radial bores 5 consists of a through bore 5-1, which is Outside of the lock body 4 to the central hole 3 is enough, and the associated blind hole 5-2. This blind hole Holes 5-2 are used to accommodate springs and locking pins (not shown) of pin lock 1.

In the exemplary embodiment shown, the lock body 2 has three rows of holes 6 , the middle row of holes consisting of five radial holes 5 , while the two outer rows of holes 6 consist of only four radial holes 5 . Four of the blind holes 5-2 in a row of holes 6 are used to accommodate the springs and locking pins of pin lock 1, while the fifth blind hole 5-2 in the middle row of holes is used to accommodate a locking element, which in the present exemplary embodiment is designed as a safety pin 9 is. The lock core 4 in the lock body 2 is secured against dismantling with the aid of the locking pin 9 . However, the design of the locking element as a hedging pin 9 is only to be understood as an example and is not essential to the invention.

The lock core 4 also has a row of holes with four core holes 7 , which also run radially to the central axis M and open into the key channel 8 . If the lock core 4 is inserted into the lock body 2, then in a predefined angular position of the lock core 4 the core bores 7 formed therein are aligned with the blind bores 5-2 formed in the lock body 2. During assembly, the springs and then the locking pins - lock body pins and cylinder pins - are inserted into the blind hole stanchions 5-2, with the locking pins being pressed by the springs in the direction of the lock core 4. If the lock core 4 is moved to one of the predefined angular positions, the locking pins are pressed into the core bores 7 formed in the lock core 4 and assigned to them. The length of the individual locking pins is measured in such a way that when a coded key is inserted into the keyway 8 in the predefined angular positions, the contact surfaces of the cylinder pins and the corresponding lock body pins are in the cylindrical surface of the Lock core 4 are located so that the lock core 4 can be rotated relative to the lock body 2.

Figures 3 and 4 show further schematic representations of the lock body 2 known from the state of the art is oriented. Based on these illustrations, the manufacturing process of this lock body 2 with one or more key removal positions is illustrated below.

A solid bar material, for example a copper alloy such as brass or an iron alloy, is generally used as the blank for the lock body 2 and is first cut to the required length. The blank is then turned to the specified outer diameter and the central bore 3 running in the longitudinal direction L is machined. The radial bores 5 are then made according to the number of trigger positions. Each of the radial bores 5 consists of the through bore 5-1 as well as the associated blind bore 5-2 arranged in the opposite cylinder wall of the lock body 2.

The radial bores 5 of a bore row 6 do not necessarily have to be made one after the other, ie sequentially in time. When using a suitable drilling tool, it is also possible to produce several or all radial bores 5 in a row of bores 6 in parallel, ie simultaneously. However, radial bores 5 of several rows of bores 6 cannot be produced at the same time, since the drilling tools would collide with one another in the region of the central bore 3, more precisely in the region of the central axis M. This is also clear from the sectional representation according to FIG Drilling channels of the individual radial bores 5 of the three bore rows 6 goes.

In the figures 5 to 7 the lock body 10 according to the invention is shown schematically in different views. 5 and 6 are essential individual parts of the lock body 10 in a perspective view. Figure 7 shows - also in a perspective view - the assembled lock body 10 from the individual parts.

The lock body 10 according to the invention is thus designed in several parts and has a base body 11 and a compartment 12 that can be mounted on the base body 11 . The lock body 10 is tubular or hollow-cylindrical, with the compartment 12 being designed as a ring sector of the tubular or hollow-cylindrical lock body 10 and with the base body 11, also designed as a ring sector, forming the tubular or hollow-cylindrical lock body 10 added.

In the compartment 12, a plurality of holes 13 is ausgebil det, which serve to accommodate springs and locking pins of a pin castle. In the example shown in FIGS. 5 to 7, the bores 13 are grouped into three rows of bores, a key removal position of the pin lock 1 being defined by each of the rows of bores. Due to the multi-part design of the lock body 10, a collision of the drilling tools, as would occur in the manufacture of the radial bores 5 position, can be avoided. Also, no through hole in the base body 11 is required to produce the holes 13 for receiving the springs and locking pins.

In the exemplary embodiment shown, the lock body 10 has a sleeve 14 which can be molded onto the base body 11, but does not necessarily have to be molded onto it. It is also possible to provide the sleeve 14 as an independent component which is mechanically connected to the base body 11 or can be chemically combined. For connection to the base body 11, the compartment 12 has two grooves (not shown) on its outside, which correspond in terms of their geometry and spatial positions to two webs 15 arranged on an inside of the sleeve 14, so that the compartment 12 can be pushed in the longitudinal direction L with the base body 11 is mechanically connected.

In the event that the lock body 10 has no sleeve 14, the grooves and webs would be provided on contact surfaces 16 of the base body 11 and the compartment 12. The use of a sleeve 14 also has the advantage that the bores 13 no longer have to be designed as blind holes, but can also be designed as through holes, since the springs to be accommodated in the bores can be supported on the inside of the sleeve 14 .

The term "hole 13" used in connection with the description of the lock body 10 according to the invention does not necessarily imply that this hole must also be produced by drilling. Because the multi-part design of the lock body 10 makes it possible to use other, more efficient production processes as drilling and turning - for example metal or plastic injection molding processes, but also additive manufacturing processes - to use for the production of the base body 11 and the compartment 12 - including the holes 13 formed therein. function-specific materials are used, which meet the requirements of the respective component - for example in terms of stability or wear resistance - in the best possible way. List of references:

1 pin lock

2 lock bodies

3 center hole

4 lock core

5 radial bore

5-1 through hole 5-2 blind hole

6 row of holes

7 core drilling

8 key channel

9 locking element / locking pin

10 lock body

11 body

12 compartments

13 hole

14 sleeve

15 jetty

16 touchpad

L Longitudinal

M central axis

R radial direction

Claims

patent claims

1. Lock body (10) for a pin lock (1), d a r c h e n n n d i c h n e t that the lock body (10) is designed in several parts and has a base body (11) and a compartment (12) mounted on the base body (11) with a plurality of bores (13) for receiving springs and locking pins.

2. Lock body (10) according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the compartment (12) can be connected to the base body (11) by displacement in a longitudinal direction (L).

3. Lock body (10) according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that the compartment has at least two rows of bores (13).

4. Lock body (10) according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that the base body (11) and the compartment (12) are formed from under different material.

5. Lock body (10) according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that the base body (11) and/or the compartment (12) can be produced using an injection molding process or an additive manufacturing process.

6. Lock body (10) according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that the lock body (10) is tubular in design, with the compartment (12) being designed as a ring sector of the tubular lock body (10).

7. lock body (10) according to claim 6, characterized in that the base body (11) is designed as a ring sector.

8. Lock body (10) according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that the lock body (10) has a sleeve (14) which encloses the base body (11) and the compartment (12) at least in sections.

9. Lock body (10) according to claim 8, d a d u r c h g e k e n n z e i c h n e t that the sleeve (14) is integrally connected to the base body (11).

10. pin lock (1), which one according to any one of claims

1 to 9 formed, multi-part lock body (10) and in the lock body (10) accommodated and mechanically coupled to this lock core (4).

11. Control device, for example a key switch, pushbutton or selector switch, for a machine or electrical system, with a pin lock (1) designed according to claim 10 and at least one contact element which can be contacted when the lock core (4) is in a predefined angular position.