Electronic locking system and manhole cover with electronic locking system

Abstract

Described and illustrated is an electronic locking system comprising an electronic lock with a lock body, a locking bolt which can be moved from a locked position to an open position via an actuator located in the lock, an electronic key which is provided with a power source which serves to energize the lock in order to operate the actuator, and at least one exchange surface each on the side of the electronic lock and the electronic key which, in close proximity to each other, particularly when in contact with each other, enable energy transfer from the key to the lock, wherein at least one mechanical anchoring means on the electronic lock, a tool and an interaction of tool and anchoring means by which the lock can be fixed at least temporarily to the tool are provided.

Description

[0001] The invention relates initially to an electronic locking system, comprising an electronic lock which has a lock body, a locking bolt of the lock which can be moved from a locked position to an open position via an actuator located in the lock, an electronic key which is provided with a power source which serves to energize the lock in order to operate the actuator, and at least one exchange surface each on the side of the electronic lock and the electronic key which, in close proximity to each other, in particular when in contact with each other, enable energy transfer from the key to the lock.

[0002] An electronic locking system of this type is known, for example, from WO 2015 / 055344 A1 of the applicant. It is characterized, on the one hand, by a high level of security, since the electronic locking system and an associated authentication procedure ensure that the operator, the lock to be opened, and the key used for opening are identified and, after successful identification by a central authority, authenticated, i.e., authorized to open the lock.

[0003] Another significant advantage of this type of locking system is that the lock is powered exclusively by the electronic key. The electrical energy required to move the bolt, as well as to operate the control and evaluation unit within the lock—which exchanges information with the electronic keys and handles at least part of the authentication process—is supplied by a battery integrated into the electronic key. This eliminates the need for a complex, temperature-independent, and continuously operating power supply for the lock, which would also have to issue a maintenance message if the energy level falls below a critical value.

[0004] The locking system described in WO 2015 / 055344 A1 and the method for operating it have proven to be advantageous in every respect for a wide variety of applications.

[0005] The object of the invention is to expand the application range of a generic locking system and to create further possible uses.

[0006] This problem is solved by an electronic locking system with the features of claim 1, in particular with its characterizing features, wherein at least one mechanical anchoring means is provided on the electronic lock, a tool is provided and an interaction of tool and anchoring means is provided, by which the lock can be fixed at least temporarily on the tool.

[0007] Until now, it was common practice to use electronic locks of this type, for example, as door locks. A door lock is fixed in place within the door leaf and readily accessible to the electronic key. After authentication and the opening process are complete, a door secured with such a locking system can be opened without any problems.

[0008] Furthermore, WO 2015 / 055344 A1 describes the application of a tube safe. In a tube safe, the electronic lock is designed as a type of plug, which is attached to a cylindrical body from the outside like a cap. The lock is easily accessible from the outside, can be unlocked with the electronic key, and can be removed from the cylindrical body after opening.

[0009] The features of the new locking system according to the invention, as described above, make it possible to use the lock for special applications in which access to the lock is not readily guaranteed.

[0010] In particular, when the lock is used as a locking element within raw-like components, the features according to the invention allow the electronic lock, designed as a locking element, to be pulled out of a tubular body by means of the tool after unlocking.

[0011] The invention deliberately uses mechanical anchoring means, such as detent contours or undercut grooves, and not the magnetic connections between lock and key suggested, for example, in WO 2015 / 055344 A1. A mechanical connection between the tool and the electronic lock allows the lock to be extracted from the tubular body even under difficult conditions, such as when the locking element is jammed within the tubular body, or in the event of contamination or corrosion.

[0012] The tool for engaging the lock's anchor points can be part of the electronic key. For example, it is conceivable that the electronic key has locking protrusions or hooks that engage in grooves, which then engage with correspondingly designed anchor points of the electronic lock and establish a mechanical connection between the lock and the key.

[0013] However, several applications are conceivable where the lock is positioned so deep within a hollow body that direct access to the lock with the key, i.e., direct engagement of the key's tools with the lock, is impossible. This is the case, for example, when the electronic lock is housed within a tubular body, but a protective plug is positioned in front of the lock. Such a protective plug serves, for instance, to prevent the ingress of foreign objects, moisture, liquids, etc., into the hollow cylindrical body.

[0014] In such a case, the tool is intended to be part of an intermediate piece that is placed between the key and the lock.

[0015] This intermediate piece bridges the gap between the electronic lock and an access opening in the hollow cylindrical body. This allows the intermediate piece, which serves as a tool, to be mechanically connected to the electronic lock.

[0016] It is conceivable that the intermediate piece is an integral part of the electronic key, or that the intermediate piece and the key have mechanical fastening contours by means of which the intermediate piece is detachably attached to the key.

[0017] In a particularly advantageous embodiment, the intermediate piece is provided with a device for transmitting energy and / or signals, which enables energy transfer from the key to the lock and / or allows signal exchange between the lock and the key.

[0018] This ensures that even a lock not directly accessible by the key is supplied with electrical energy by the electronic key for the opening and / or authentication process, and that signal transmission between lock and key can take place.

[0019] Furthermore, the invention is characterized in that the electronic and mechanical components of the lock are contained in the body of the lock, the body is provided with a cover plate on its upper side, which forms the exchange surface of the lock, and a protective plate is arranged downstream within the body and the cover plate.

[0020] It is known that mechanical and electronic locking systems, particularly cylinder locks, can be opened by drilling, thereby destroying the locking mechanism. It is also known to insert screws into locking devices to serve as attachment points for a puller. Using the puller, tensile forces are applied to the locking mechanism that exceed its structural integrity and lead to its destruction.

[0021] The aforementioned cover plate, particularly if it is made of a hardened material such as a hardened metal or at least has a hardened surface, serves as drill protection. Since contact surfaces made of unhardened material are necessary for the exchange of information and electricity, the protective disc arranged beneath the cover plate serves as additional drill protection. The protective disc is preferably also provided with at least one hardened surface, but more specifically, it is made of a hardened material such as a hardened metal.

[0022] To protect the electronic and mechanical components of the lock, it is provided that the essential electronic and mechanical components of the electronic lock, in particular the actuator, the locking bolt and the control electronics, are arranged towards the underside of the body behind the protective screen.

[0023] For special applications, the body is designed to be a cylindrical body, preferably with a maximum diameter of 35 millimeters and a maximum length of 50 millimeters.

[0024] Specifically, the invention is characterized in that the body is provided with a groove incorporated into a circumferential wall, which is aligned parallel to the longitudinal axis and has an insertion opening located in the underside of the body.

[0025] It is also intended that the locking bolt, in its locking position, will dip into the groove.

[0026] The invention relates to a manhole cover, in particular a manhole cover for a well shaft, comprising a pipe stub having an inlet opening, a locking device anchoring a cover of the manhole cover in a closed position and accessible via the pipe stub, a locking lug extending from the wall of the pipe stub, a closure piece which, being seated in the pipe stub, prevents access to the locking device, a locking bolt of the closure piece, a closed position of the locking bolt in which it engages behind the locking lug, and an open position of the locking bolt in which the engagement of the locking bolt and locking lug is released and the closure piece can be removed from the pipe stub, and an access control device which cooperates with the closure piece and by means of which the locking bolt of the closure piece can be moved into the open position.

[0027] This manhole cover solves the inventive problem through the characterizing features according to which at least one mechanical anchoring means on the electronic lock, a tool and an interaction of tool and anchoring means, by which the lock can be fixed at least temporarily to the tool, is provided.

[0028] Manhole covers, especially those for well shafts, have a pipe socket or a cylindrical, sleeve-like body. Using an opening tool, usually a rod, the locking mechanism located beneath the manhole cover can be released via this socket. With the locking mechanism released, the manhole cover can be opened, for example, to carry out maintenance work.

[0029] In the prior art, which cannot be described in print, the pipe stubs of manhole covers are equipped with locking pieces that feature a purely mechanically operating cylinder lock. The locking pieces are designed as cylindrical bodies, are seated in the pipe stub, and prevent unauthorized persons from releasing the locking mechanism of the manhole cover.

[0030] The pipe fitting is generally fitted with a protective plug. Some protective plugs are placed on the pipe fitting, particularly screwed on. In an alternative design, the protective plug is embedded within the pipe fitting. Especially in the latter design, the plug is significantly recessed from the pipe fitting's inlet opening.

[0031] In the case of the locking piece with mechanical locking cylinder known from the prior art, the associated key serves on the one hand as an access control device, since only a person possessing the key can unlock the locking cylinder of the locking plug.

[0032] On the other hand, the key also serves as a tool by which the sealing piece can be pulled out of the pipe fitting.

[0033] The use of the locking system according to the invention with an electronic lock, which is kept without a keyhole, allows for the first time, through the design of a tool attachment and an associated tool, its use in the aforementioned manhole cover and comparable situations.

[0034] Electronic locks of the type that are keyhole-free and in which the energy supply to the lock and the signal exchange take place without contact or only by mutual contact between the lock and key, have the essential advantage of offering hardly any mechanical attack surfaces for manipulation of the lock.

[0035] Since the anchoring means according to the invention serve only as the starting point for a tool, their position and design can be tailored solely to the purpose of removing the lock from confined spaces. This reliably prevents the anchoring means from representing weak points for mechanical manipulation of the lock.

[0036] Further advantages and a better understanding of the invention will follow from the description of an exemplary embodiment. It will show: Fig. 1: a manhole cover according to the invention in a perspective overall view, Fig. 2: the pipe socket of the manhole cover according to Fig. 1 with electronic lock and intermediate piece in a first perspective view, Fig. 3: the representation according to Fig. 2 in an alternative perspective view, Fig. 4: a partial representation of the manhole cover according to Fig. 1 with a section through the pipe stub and electronic lock as in a first installation position, Fig. 5: the electronic lock including intermediate piece in perspective view, Fig. 6: the intermediate piece in perspective of the underside, Fig. 7: the electronic lock in perspective of the top, Fig. 8: a sectional view of the pipe support with electronic lock in the first installation position, Fig. 9: a sectional view accordingly Fig. 8 with intermediate piece and key, Fig. 10: a sectional view through the pipe support according to Fig. 4and electronic lock in second installation position, Fig. 11: the illustration Fig. 10 with attached key, Fig. 12: a sectional view through the electronic lock, Fig. 13: a key to the locking system of the invention in a perspective view of the front, Fig. 14: the key according to Fig. 13 in perspective view of the back.

[0037] In the figures, a manhole cover according to the invention is provided with the reference numeral 10. The locking system according to the invention, which is shown by way of example in its application for securing a manhole cover, is provided with the reference numeral 100.

[0038] The in Fig. 1 The illustrated manhole cover 10 initially comprises a manhole surround 11 with fastening tabs 12, which serve to secure the manhole cover 10 to manhole walls not shown, for example walls of a well shaft.

[0039] A cover 13 is arranged on the shaft casing 11, which can be pivoted from its closed position (shown) to an open position. The cover 13 is secured in its closed position by a locking mechanism (not shown), which is accessible via a pipe stub 14. To prevent foreign objects from entering the pipe stub 14 and impairing the function of the locking mechanism, a sealing plug 15 is fitted onto the pipe stub 14.

[0040] Finally, in the embodiment shown here, the manhole cover 10 has a ventilation pipe 16 which is not essential for the invention.

[0041] Fig. 2 Figure 1 shows the pipe stub 14 of the manhole cover 10 and its sealing plug 15. Also shown is an electronic lock 101 as part of the locking system 100 according to the invention.

[0042] In the application shown here, the electronic lock 101 serves as a locking element for the pipe fitting 14. It has a cylindrical shape that conforms to the inner contour of the pipe fitting 14. In this case, it is a circular cylindrical shape. On its upper surface O, the electronic lock 101 is provided with a substantially flat cover plate 103, which can be integrally bonded to the cylindrical body 104 or inserted into the body 104 as a separate component.

[0043] The cover plate 103 provides an exchange surface 105 via which the electronic lock 101 is supplied with electrical energy by a key 200 described later, and via which the electronic lock 101 and the electronic key 200 may exchange signals. The energy and / or signal exchange can be contactless, for example, via inductive methods. However, in a particularly preferred embodiment, mechanical contact surfaces 106 are provided on the cover plate 103 for the energy and / or signal exchange.

[0044] The cover plate 103 is essentially flat and, in particular, free of keyholes, so that the interaction with the electronic key 200 takes place without contact or simply by resting on the exchange surface 105.

[0045] A locking groove 107 is incorporated into the outer surface of the body 104. This locking groove 107 extends parallel to the longitudinal axis of the cylinder and opens into a insertion opening 108 on the underside U of the body.

[0046] On the upper side, the bolt groove 107 forms a bolt nose seat 109, which is located below the cover plate 103.

[0047] The body 104 of the electronic lock 101 forms mechanical anchoring means 111 on its upper surface. These are accessible to a tool 300, described later, for pulling the electronic lock 101 out of the pipe fitting 14. In the specific embodiment, the anchoring means 111 is arranged in the edge region of the cover plate 103 and at the transition to the outer surface 110 of the body 104, but this is merely a preferred embodiment and does not represent any restriction on the position of the anchoring means 111 on the electronic lock 101.

[0048] The electronic locking system 100 can optionally include an intermediate piece, designated here by the reference number 112. The intermediate piece 112 makes it possible, in specific applications, to bridge a distance between an entry opening 17 of the pipe stub 14 and the electronic lock 101, which, depending on the application, is located deep within the pipe stub 14 opposite the entry opening 17.

[0049] The intermediate piece 112 has a device 113 for transmitting energy and / or signals to the electronic lock 101. For this purpose, in the present embodiment, it has ring contacts 114 on its upper surface O facing away from the lock 101 and contact pins 115 on its lower surface U facing the lock 101. However, this specific configuration is merely due to the preferred implementation in the invention, which proposes a mechanically contacted connection between the key 200 and the lock 101 – optionally with the intermediate piece 112 interposed.

[0050] For contactless transmission of energy and / or signals, corresponding induction coils can be arranged in the intermediate piece 112.

[0051] The intermediate piece 112 then carries on its underside a tool 300 which can interact with the mechanical anchoring means 111 of the electronic lock 101 and which will be discussed in more detail later.

[0052] Fig. 2 The representation shows after Fig. 3 from a different perspective. In Fig. 3 A view of the underside U of the lock 101 as well as of the intermediate piece 112 is possible, so that in particular the contact pins 115 and the tool 300 are visible in the intermediate piece 112.

[0053] The in Fig. 2 and Fig. 3 The electronic lock 101 shown is in a separate section. Fig. 7 Shown in perspective view of the top surface O. Fig. 7The figure clearly shows that the body 104 depicted here forms the cover plate 103 as a single, integrally bonded component, whereas a separate locking plate 116 is provided on the underside U. This has the essential advantage that all components of the electronic lock 101 to be housed in the body 104 are covered by the locking plate 116, which is in any case protected within the pipe stub 14. The integrally bonded, integrally bonded cover plate 103 of the body 104 significantly hinders mechanical manipulation of the lock 101, in particular, breaking open the lock 101. As already described, this is a preferred embodiment, but by no means essential for the invention. The cover plate 103 can be formed just as effectively, and with no less success, as a separate component attached to a body 104.

[0054] The locking groove 107, which is incorporated into the outer surface 110, is, as can be clearly seen here, accessible from the underside U via the insertion opening 108. Opposite the insertion opening 108, the locking groove 107 forms the aforementioned locking lug seat 109 at its end near the cover plate 103.

[0055] Fig. 12 shows a simplified cross-sectional view through the electronic lock 101, from which an exemplary structure of the lock 101 can be seen.

[0056] The electronic lock 101 initially comprises a body 104, which has an internal cavity 120. This cavity 120 is closed on its underside U by a locking plate 116 and houses the essential components of the electronic lock 101. These include, firstly, the locking bolt 119, which is held in its locked position by a spring element 121, shown here as an example of a screwdriver. In the locked position, the free end of the locking bolt 119 is supported in the locking groove 107, which is accessible from below via the insertion opening 108 in the locking plate 116.

[0057] Above the bolt 119, the bolt groove 107 forms the bolt nose seat 109, which receives the pipe-side bolt nose 18 when the lock 101 is arranged in the pipe stub 14.

[0058] The locking bolt 119 is mounted inside an electromagnet 122. After successful authentication, this is energized by the key 200 to move the locking bolt 119 into its open position, i.e., to retract it into the body 104 against the spring element 121.

[0059] A control unit 123, shown here as a circuit board, is located in cavity 120. This control unit 123 communicates between key 200 and lock 101 during the authentication process and controls the opening and closing of the lock 101.

[0060] A protective disc 124 is inserted towards the top O, which closes the cavity 120 towards the top, i.e., towards the cover disc 103. Above the protective disc 124 is the cover disc 103, which here is an integral, materially bonded component of the body 104, but can also be designed as a separate component.

[0061] The cover plate 103 is provided with a hardened surface 125. The hardened surface 125 protects the cover plate 103 against cutting tools, in particular drills, which unauthorized persons could use to attempt to tamper with the lock 101.

[0062] Electrical conductors 126 are connected to the contact surfaces 106, which are not shown in this illustration but have already been mentioned, and are guided - preferably at the edge - through the protective disc 124 to the control unit 123 to ensure the power supply and signal exchange between lock 101 and key 200.

[0063] Finally, the cross-sectional view of the castle shows 101 in Fig. 12 the mechanical anchoring means 111, which are incorporated into the outer surface 110 of the body 104 in the area of ​​the cover plate 103.

[0064] Based on Fig. 7 The mechanical anchoring devices 111 chosen here can be excellently described in their form.

[0065] In the exemplary embodiment of the invention, the anchor means 111 are formed by a radially outwardly open anchor groove 117, which is recessed into the outer surface 110 of the body 104 below the cover plate 103. The respective anchor groove 117 is accessible from the top O via a receiving opening 118, so that the extension 301 of a tool, which will be described later, can be inserted into the anchor groove 117. The cover plate 103 is radially recessed above the anchor groove 117, so that its diameter is slightly smaller in this area. This creates a guide gap between the inner circumferential surface of the pipe stub 14 and the cover plate 103, along which the tool extension 301 can be moved from the receiving opening 118 into a locking position within the anchor groove 117.

[0066] Alternative designs of the mechanical anchoring means 111 are conceivable, for example, detent openings. It is essential that the selected mechanical anchoring means 111 is accessible from the top O on the side of the electronic lock 101 in order to position the tool 300 on the lock 101 from the entry opening 17 of the pipe fitting 14.

[0067] Fig. 6 Figure 1 shows the intermediate piece 112, which optionally belongs to the locking system 100, in a perspective view of its underside. The underside of the intermediate piece 112 initially has contact pins 115 which correspond in their position to the contact surfaces 106 of the lock 101, provided that the contact-based energy and signal transmission to the lock 101, which is advantageously proposed by the invention but not absolutely necessary, is used.

[0068] Fig. 6However, the figure also shows in particular the tools 300 arranged on the underside of the intermediate piece 112. Each tool 300 forms a tool projection 301 in the form of a radially inwardly directed locking leg 302. Each locking leg 302 is arranged on the underside of the intermediate piece 112 via an axially directed retaining leg 303.

[0069] Each tool 300 essentially consists of a hook, with the addition of Fig. 7It becomes clear that the bolt leg 302 can penetrate the receiving opening 118 and enter the cover plate 103 of the lock 101, thus reaching the area of ​​the anchor groove 117. Rotating the tools 300 about the longitudinal central axis of the body 104 causes the respective bolt leg 302 to enter the anchor groove 117. As soon as the bolt legs 302 are seated in the anchor groove 117, a bolt position is reached that allows the lock 101 to be pulled out of the pipe socket 14 with the aid of the tool 300.

[0070] In Fig. 6 The tools 300 are part of the intermediate piece 112, which - as mentioned above - is intended to be used with a lock 101 that is set back in the pipe stub 14 opposite the entry opening 17.

[0071] Fig. 5The electronic lock 101 with the attached intermediate piece 112 is shown, with the tool 300 clearly seated in the anchor groove 117 and assuming a bolt position. In the illustration of the Fig 5 The so-called bolt end position is reached, in which the tool 300 is seated at one end of the anchor groove 117 opposite the receiving opening 118.

[0072] In this bolt end position, the bolt leg 302, which is not described in detail here, not only engages the anchor groove 117. In this bolt end position, the following are also located Fig. 6 The contact pins 115 shown on the in Fig. 7The contact surfaces 106 shown are located on the contact surfaces. With the configuration of the contact surfaces 106 chosen here, energy and / or signal transmission to the electronic lock 101 is only possible in the bolt end position. However, it is also conceivable that ring contacts are provided instead of the individual contact surfaces 106, analogous to the ring contacts on the top of the intermediate piece 112. In that case, energy and / or signal transmission is also conceivable in positions other than just the bolt end position.

[0073] Fig. 13 and Fig. 14 show the key 200, whereby Fig. 13 a perspective view of the front and Fig. 14 This is a perspective view of the back of the Key 200.

[0074] The in Fig. 13The front of key 200 shown here features a numeric keypad 201, which allows an operator to enter information on the key 200. However, such an input device is not necessarily limited to a numeric keypad 201. It could also be an alphanumeric keypad. Furthermore, it is conceivable to incorporate communication interfaces according to common wireless standards or other input devices, for example, for the recognition of biometric features, on the key. Using such an input device, in this case the numeric keypad 201, the operator can enter authorization codes received from a central office, for example. These codes are then compared by the control electronics of the lock 101, and if authentication is successful, the lock 101 is opened.

[0075] On his in Fig. 14On its reverse side, the key 200 has pin-shaped key contacts 202. These are designed to connect with the contact surfaces 106 of the electronic lock 101 or – depending on the installation position of the lock 101, which is described in more detail below – with the ring contacts 114 of the intermediate piece 112. In this way, in the embodiment shown here, it is possible to exchange electrical energy and / or signals between the key 200 and the lock 101 – optionally via the intermediate piece 112. Furthermore, the key 200 has a tool 300 on its reverse side, which is designed analogously to the tool 300 of the intermediate piece 112. It therefore has a tool projection 301 formed by a bolt leg 302 and a retaining leg 303.

[0076] Depending on the installation position of the lock, tool 300 of key 200 is used analogously to tool 300 of intermediate piece 112 to connect key 200 directly to lock 101. Alternatively, as described below, and again the installation position of lock 101 is the relevant factor here, it is conceivable to couple key 200 to intermediate piece 112 using tool 300 of key 200.

[0077] Fig. 4 Figure 1 shows a cross-sectional view through the shaft cover 10 in the area of ​​the pipe stub 14. It shows that the electronic lock 101 is seated in the pipe stub 14 and is set back downwards, i.e., towards the well shaft, relative to the inlet opening 17. The inlet opening 17 itself is closed by the sealing plug 15.

[0078] Fig. 8 shows the facts of Fig. 4again in an enlarged view of the pipe stub 14 without showing the manhole cover 10.

[0079] Here, among other things, it can also be seen that the pipe stub 14 forms an internal locking lug 18, which, when the lock 101 is correctly seated in the pipe stub 14, finds its place in the locking lug seat 109.

[0080] To ensure this, the electronic lock 101 is inserted into the pipe socket 14 with its underside U facing forward, whereby the receiving opening 118 of the bolt groove 107 is aligned with that of the bolt lug 18. The bolt lug 18 can penetrate through the receiving opening 118 into the bolt groove 107 until the electronic lock 101 is prevented from sliding further into the pipe socket 14 by the bolt lug 18 engaging in the bolt lug seat 109.

[0081] The locking bolt 119, carried by the electronic lock 101, engages behind the locking nose 18 and thus prevents the electronic lock 101 from being removed from the pipe socket 14.

[0082] Fig. 9 shows similar to Fig. 8 a sectional view through the pipe stub 14. To the lock 101 at the according to Fig. 4 or Fig. 8 To remove the recessed lock position from the pipe socket 14, the electronic key 200 is coupled with the intermediate piece 112. Alternatively, the intermediate piece 112 can also be a single, integral, material-locking component of the key 200.

[0083] If the electronic key 200 and the intermediate piece 112 are separate components, the key 200 is connected to the intermediate piece 112 in a rotationally fixed manner. It is advantageous for the tool on the key side (not shown here) to be modeled on the tool 300 of the intermediate piece 112. The intermediate piece itself should then sensibly have anchoring means on its upper surface that are modeled on the mechanical anchoring means 111 of the lock 101. This is a sensible and practical embodiment for the mechanical coupling of the key 200 and the intermediate piece 112. However, it is not essential for the invention. A different rotationally fixed coupling between the components 101 and 112 is also possible.

[0084] After attaching the intermediate piece 112 to the electronic key 200, the latter is placed onto the pipe fitting 14 with the intermediate piece 112 leading, the intermediate piece 112 projecting into the pipe fitting 14. The tools 300 of the intermediate piece 112 engage with the anchor means 111 of the lock 101, and the intermediate piece 112 is moved into its locked position by means of the key 200. In this way, contact between the intermediate piece 112 and the lock 101 is ensured.

[0085] An authentication process now takes place, during which an authorization code for opening lock 101 is obtained. This code is then transmitted to lock 101. Through energization by key 200 and via the intermediate piece 112, the electronic lock 101 receives the necessary energy to retract the locking bolt 119 to its open position. The electronic lock 101 can now be pulled out of pipe 14 using key 200 and the intermediate piece 112.

[0086] The way is now clear to open the locking mechanism of the cover shaft, which is located below the pipe stub 14, using a suitable tool.

[0087] Fig. 10 Figure 1 shows an alternative arrangement of the lock 101 in the pipe stub 14. Here, the lock 101 sits with its upper surface O in the area of ​​the entry opening 17 directly below the sealing plug 15.

[0088] With the sealing plug removed (see Fig. 11 The top surface O of the electronic lock 101, in particular the cover plate 103 with its interchangeable surface, is easily accessible. Unlike the one to Fig. 8 and Fig. 9 In the situation described, it is not necessary to insert an intermediate piece 112 into the pipe stub 14 to establish contact with the electronic lock 101 for energy and / or signal transmission. Here, as in Fig. 11 As shown, the electronic key 200 is placed directly onto the cover plate 103 and transmits energy and / or signals for authentication and opening of the lock 101.

[0089] In this case, the electronic key 200 carries the tool 300 to engage with the anchor point 111 of the lock 101 in order to pull the lock 101 out of the pipe socket 14 when the key 200 is lifted.

[0090] It is quite conceivable that in the Fig. 10 and Fig. 11 In the illustrated installation situation of the electronic lock 101, a magnetic holding force between the lock 101 and the key 200 is sufficient. A tool 300 with mechanical engagement of the anchoring means 111 is therefore not strictly necessary. However, the invention prefers mechanical anchoring means 111 on the side of the lock 101 and a tool 300 on the side of the key 200 even in this installation situation, since the specific application as a locking element in a manhole cover cannot rule out the possibility that the lock 101 might become jammed by foreign objects in the pipe stub 14. In such a case, the magnetic holding forces would likely not be sufficient to release the lock 101 from the pipe stub 14.

[0091] It is evident that in both installation positions shown, the lock 101 is completely enclosed in the pipe socket 14 and sits flush in the pipe socket 14, making it almost impossible to grasp the lock 101 manually without tool 300. Reference symbol list 10 Manhole cover 100 Locking system 11 shaft lining 101 electronic lock 12 Mounting tabs 103 Cover plate 13 Lid 104 Body 14 pipe stub 105 Exchange surface 15 sealing plug 106 Contact surfaces 16 ventilation pipe 107 bar groove 17 Entrance opening 108 Insertion opening 18 Bar nose 109 bolt nose seat 110 Surface area 200 electronic key 111 mechanical anchoring device 201 Number keypad 112 Intermediate piece 202 Key contact 113 Forwarding device 114 Ring contact 300 Tool 115 Contact pin 301 Tool approach 116 Closure plate 302 bar leg 117 anchor groove 303 Retaining leg 118 opening 119 Locking bolt O Top 120 cavity U bottom 121 spring element 122 Electromagnet / Actuator 123 control unit 124 Protective screen 125 hardened surface 126 electrical conductor

Claims

1. Electronic locking system (100), - comprising an electronic lock (101) which has a lock body (104), - comprising a locking bolt (119) of the lock (101) which can be moved from a locked position to an open position by means of an actuator (122) located in the lock (101), - comprising an electronic key (200) which is provided with a power source which serves to energize the lock (101) in order to operate the actuator (122), - comprising at least one exchange surface (105) each on the side of the electronic lock (101) and the electronic key (200) which, in close proximity to each other, in particular when placed against each other, enable energy transfer from the key (200) to the lock (101), characterized by,- at least one mechanical anchoring means (111) on the electronic lock (101), - a tool (300) and - an interaction of tool (300) and anchoring means (111) by which the lock (101) can be fixed at least temporarily on the tool (300).

2. Electronic locking system (100) according to claim 1, characterized by the fact that the tool (300) is part of an intermediate piece (112) which is placed between the key (200) and the lock (101).

3. Electronic locking system (100) according to claim 2, characterized by the fact that the intermediate piece (112) is arranged in one piece on the key (200).

4. Electronic locking system (100) according to claim 2, characterized by the fact that the intermediate piece (112) and the key (101) have mechanical fastening contours by means of which the intermediate piece (112) is detachably fixed to the key (101).

5. Electronic locking system (100) according to one of claims 2 or 3, characterized by the fact thatthe intermediate piece (112) is equipped with a device for transmitting energy and / or signals, which enables energy transfer from the key (200) to the lock (101) and / or allows signal exchange between the lock (101) and the key (200).

6. Electronic locking system (100) according to one of the preceding claims, characterized by the fact that - the electronic and mechanical components of the lock (101) are contained in the body (104) of the lock (101), - the body (104) is provided with a cover plate (103) on a top side (O), which forms the exchange surface (105) of the lock (101), - a protective plate (124) is arranged downstream within the body (104) and the cover plate (103).

7. Electronic locking system (100) according to claim 6, characterized by the fact thatthe essential electronic and mechanical components of the electronic lock (101), in particular the actuator (122), the locking bolt (119) and the control electronics (123) are arranged towards the underside (U) of the body (104) behind the protective screen (124).

8. Electronic locking system (100) according to one of the preceding claims, characterized by the fact that the body (104) is a cylindrical body which preferably has a diameter of no more than 35 millimeters and a length of no more than 50 millimeters.

9. Electronic locking system (100) according to one of the preceding claims, characterized by the fact that the body (104) is provided with a groove (107) incorporated into a circumferential wall, which is aligned parallel to the longitudinal axis and has a insertion opening (108) located in the underside (U) of the body.

10. Electronic locking system (100) according to claim 9, characterized by the fact thatthe locking bolt (119) in its locking position dips into the groove (107).

11. Manhole cover (10), in particular a manhole cover (10) of a well shaft, - with a pipe stub (14) having an inlet opening (17), - with a locking device anchoring a cover (13) of the manhole cover (10) in a closed position, which is accessible via the pipe stub (14), - with a locking lug (18) extending from the wall of the pipe stub (14), - with a locking piece which, being seated in the pipe stub (14), prevents access to the locking device, - with a locking bolt (119) of the locking piece, - with a closed position of the locking bolt (119) in which it engages behind the locking lug (18), and - with an open position of the locking bolt (119) in which the engagement of the locking bolt (119) and locking lug (18) is released and the locking piece can be removed from the pipe stub (14), - with an access control body,that interacts with the locking piece and by means of which the locking bolt (119) of the locking piece can be moved into the open position, characterized by the fact that - the manhole cover (10) is provided with an electronic locking system (100) according to one of claims 1 to 10, - the locking element is formed by the electronic lock (101), - the access control device is formed by the electronic key (200).

12. Manhole cover (10) according to claim 11, characterized by the fact that the closure piece is set back from the entrance opening (17).

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