EP1808275A2 - Tool storage unit - Google Patents

Abstract

The system has a tool support (1) such as wall hangers, tool insert in a tool box or drawer of a tool carriage, for accommodating hand tools, where the support is fastened with sensors at an insertion surface of the tools. The sensors provide signals that are fed to an electronic evaluation unit by data links (4), where the evaluation unit is connected with the support, and the signals are transmitted to a central control unit (7). The control unit detects information about the support, and a signal transducer (8) converts the signals into a signal that is viewable and/or hearable by a person.

Description

The present invention relates to a tool providing device with a tool carrier, which has a recess for receiving a tool, in particular a hand tool. In addition, the invention relates to a sensor unit for a tool providing device according to the invention and to a method for operating the sensor unit.

Tool supply devices of the generic type are, for example, tool boxes, tool collecting systems, tool cabinets and the like, which are intended to receive and store tools, in particular hand tools, and / or to keep them ready for their intended use. The tools may be, for example, hand or machine operated, such as screwdrivers, pliers, wrenches, drills, grinders, and the like. Among other things, the tool delivery device serves to keep the individual tools ready for easy manual and / or automatic access and to receive them protected, so that they can not be damaged by improper storage.

In addition, in many technical areas of maintenance and construction, it is important that tools are stored completely in their predetermined position upon completion of appropriate activities. In this way it should be avoided that the tools can not lead to a dangerous condition when operating a maintained device or a commissioned device. This is particularly necessary in the field of safety technology and traffic engineering, for example, a tool forgotten in a travel path can lead to an accident of a vehicle. In particular, this applies of course to rail vehicles and Driveways and for aircraft. A forgotten tool could result in an accident with considerable personal injury and / or material damage. Therefore, it is common in the prior art, not only to examine whether there are possibly tools that have been forgotten in the appropriate facilities, but also special tool delivery devices of the generic type are used, which allow the absence of Tool to recognize immediately. Appropriate measures can then be initiated immediately, so that dangerous conditions can be largely avoided.

For example, the use of tool carriers having recesses into which only one tool can be inserted is known from the prior art. If a tool is missing, this can be recognized directly by an empty recess. A further improvement experienced generic devices in that the recesses are offset in color relative to the tool, so that is enhanced by the color appearance of the visual effect on an inspecting person. The risk of missing an empty recess by mistake can be reduced.

Moreover, it is known to provide the tool carrier with corresponding sensors with which the presence of the tool can be detected. For example, tool carriers are known which have a sensor on the receiving side for detecting the tool. This sensor may be formed, for example, on an inductive basis or on an electromechanical basis in the form of a contact.

The known tool delivery devices have the disadvantage that the sensors are exposed on the one hand in the field of recording the mechanical requirements during normal operation, with an increased risk of damage and thus the failure exists. Other sensors are not suitable for reliable use in conjunction with electrically conductive tool carriers. There is therefore a need to improve generic tool delivery devices.

The present invention is therefore the object of developing a generic tool providing device such that the aforementioned disadvantages can be avoided.

As a solution is proposed with the present invention that on a the tool-side recess opposite side of the tool carrier, a sensor unit is arranged.

For the first time, it is proposed with the invention that the sensor unit is arranged outside the region of the recess for receiving the tool, so that the sensor unit is essentially protected by the tool carrier itself when the tool supply device is used as intended. In this case, the tool carrier may be formed of an electrically non-conductive material such as plastic, ceramic or the like or of an electrically conductive material such as metal, steel, especially stainless steel, brass or the like, as well as alloys and composites thereof. In particular, the recess of a contour of the tool is modeled in order to achieve, for example, a predeterminable orientation and / or a holding effect of the tool in the recess can. The recess for receiving the tool is preferably formed only slightly larger than the outer dimensions of the tool, so that it can be easily removed from the recess in a simple manner or inserted into the recess for receiving. The recess can be dimensioned such that slight tilting of the tool during removal or during recording does not lead to obstruction of Entbeziehungsweise recording movement.

On the opposite side of the recess, the sensor unit is arranged on the tool carrier. This can for example be attached to the tool carrier itself, or the tool carrier is arranged in the tool supply device such that the recess comes to lie in the region of the sensor unit. The sensor unit may, for example, be a capacitive sensor unit, an inductive sensor unit, an optical sensor unit, an electromagnetic sensor unit or the like. However, a capacitive sensor unit is advantageously used only if the tool carrier has only a very low or no electrical conductivity. The sensor unit serves to signal a presence or absence of the tool in the recess. In this way it can be tracked at any time, whether in the recess of the tool carrier a tool is present or not. The sensor unit is preferably adapted to the properties of the tool. In the case of an electrically conductive tool, it is therefore possible, for example, to use an inductive sensor unit which can detect the presence of the tool due to the presence of eddy currents. At a electrically non-conductive tool, for example, an optical sensor unit can be used with the optical properties of the tool can be exploited to detect its presence in the recess can. Of course, the tool carrier may also have more than one recess for receiving tools, which moreover need not be configured the same, but may be designed for different tools. The tool carrier can be designed so that the recesses are arranged such that the tool carrier can accommodate as many tools as small as possible space. Of course, it can also be provided that a plurality of associated recesses are provided for a tool, if it requires the geometry of the tool. In this case, a sensor unit is already sufficient on a recess in order to be able to detect the presence of the tool. However, in order to reduce the risk of misdetections, it may further be provided that one or even a common sensor unit is arranged on several or all recesses for the tool. This can also be achieved that the tool is arranged in the intended manner in the tool providing device. The risk that a tool could fall out due to an improper arrangement in the tool carrier can be reduced.

According to a development, it is proposed that the tool carrier is formed from plastic and / or from an electrically conductive material, in particular metal, particularly preferably a non-magnetic metal. The use of an electrically conductive material for the tool carrier makes it possible to protect the sensor unit against electromagnetic interference. Such disturbances can be, for example, high-frequency interference fields, electrostatic charging or the like. In addition, with metal, especially stainless steel, a particularly robust tool carrier can be achieved, which can reliably perform its function even for harsh operating requirements over a long period of time. In addition, the tool carrier can also be made of plastic in order to reduce costs. The plastic can also be electrically conductive.

According to a further embodiment, the sensor unit is in operative connection with the tool carrier. In particular, the sensor unit is attached to the tool carrier so that the sensor unit forms a common assembly with the tool carrier. This is particularly advantageous if the tool carrier in the tool delivery device is interchangeable or should be exchangeable, for example, if there is damage to the tool carrier or the like. Of course, it can also be provided that the Tool supply device is equipped as needed with appropriate tool carriers that can be provided for different tools. Usability can be improved.

In addition, it is proposed that the operative connection is elastic. In this way, the sensor unit can be at least partially mechanically decoupled from the tool carrier, so that a risk of damage caused thereby can be reduced. The elastic operative connection can be formed for example by an elastic adhesive such as silicone adhesive or the like or by a mechanical, provided with rubber buffers holder for the sensor unit.

According to a further embodiment, the tool providing device has a control unit. The control unit can process signals from the sensor units connected to it. Thus, it can be provided that the control unit interrogates the sensor units via a communication connection with respect to the detection state. Furthermore, a corresponding supply of the respective sensor unit with energy, detection signals and the like can be provided by the control unit. In addition, the control unit can have an evaluation unit which determines the state with regard to the presence of a tool in the recess from the signals transmitted by the sensor units. Of course, a separate control unit can be provided for each sensor unit, but advantageously a control unit is responsible for a plurality of sensor units. The control unit may be designed as an electronic circuit. It may for example be formed from an integrated electrical circuit such as an ASIC, FPGA or the like.

According to a further embodiment, the tool providing device has a display unit. The display unit may be, for example, an acoustic, an optical, a tactile display unit or the like. Of course, different display units can be combined. It can be provided that the display unit only generates an indication when requested. This can save energy. The acoustic display unit can be formed, for example, by a loudspeaker, a piezo buzzer or the like. The optical display unit may be formed by a lamp, a display panel, a screen or the like. The display field can be provided, for example, to display alphanumeric characters. The tactile display unit can be formed by a vibration unit, as used, for example, in mobile telephones.

In an advantageous development, the tool delivery device has a message unit. The reporting unit may be provided, for example, to generate a signal corresponding to the occupancy states in the recordings of the tool carrier and to forward this to a further, in particular remote location. Preferably, the location is located outside of the tool delivery device. The location can be formed for example by a central office, a central computer or the like. Preferably, the reporting unit is in communication with the control unit. The reporting unit can be provided, for example, to generate a single signal with which only the presence or the absence of a single tool is detected. However, it can also be intended to report information with which information is transmitted that is specific to the corresponding tool. Preferably, the reporting unit is adapted to generate a signal for all recesses monitored by one or more sensor units connected by control units.

Particularly preferably, the sensor unit, the control unit, the display unit and / or the reporting unit are wired and / or wirelessly in communication with each other. The communication connection can be made for example via a cable network. Preferably twisted two-wire cables are used, with which a high immunity to interference with respect to the transmission can be achieved. Through a wireless communication connection, a corresponding cabling effort can be reduced. In addition, this configuration is particularly suitable for retrofitting or upgrading, since the connection and installation of cables can be saved. Simple, quickly performed adjustments to the tool carrier or to the tool delivery device can be made without much effort. The wireless communication connection can be made for example by means of radio, infrared or the like. In this way, the information or data between the units can be exchanged in any way. In addition, the communication connection can also be partially or completely wired.

Furthermore, it is proposed that the tool carrier has at least one separable tool carrier unit. The tool carrier itself therefore does not have to be formed in one piece, but rather it can have a plurality of tool carrier units which can be put together or completed in any manner to form the tool carrier. So can for different tools be provided different tool carrier units. The tool carrier unit can be designed for one tool or for a plurality of tools by being provided with a corresponding number of recesses. If the tool carrier unit is designed for a plurality of tools, these are preferably the same tools. The tool carrier unit also has fastening means with which it can be fastened to the tool carrier or to further tool carrier units. Fastening means or connecting means may be, for example, clamping connections, snap-groove connections, screw connections or the like. Of course, different connections can be combined. The invention thus makes it possible to assemble the tool carrier quasi in modular design by tool carrier units. High flexibility and high reliability can be achieved.

According to a development, the tool carrier unit has an interface for producing a communication connection between the tool carrier and the tool carrier unit. When an interface is arranged on the tool carrier unit, its presence or absence can be determined. In addition, it can be determined for which tools the tool carrier unit is provided. For example, the tool carrier unit can be provided with an identification which can be interrogated via the interface. The identification may include information about the type and number of tools for which the tool carrier unit is intended. The identification may be formed by a simple code signal, for example a resistance value, a contact sequence or the like. The identification can be provided, for example, in the form of a transponder chip or the like provided on the tool carrier unit. Through the identification, the control unit can determine which types of tool carrier units are contained in the tool carrier and, if appropriate, which tools and which number of tools can be accommodated in the tool carrier and / or in the tool carrier units. The tool carrier also preferably has appropriate interfaces at suitable locations which can be coupled to the interface of the tool carrier unit. The interface can be, for example, a wired interface having a contact pad which can be brought into electrical contact with a corresponding contact spring field. Of course, a wireless interface may be provided, which makes it possible to establish a communication link based on radio, infrared or the like. The latter embodiment has the It is preferable that the communication connection via the interface can be made reliably even in a harsh atmosphere, because problems such as contact corrosion, contact contamination and the like can be avoided. When using a transponder chip can also be provided that the tool carrier unit is powered by the interface with energy. The communication link itself may be in the form of an interface protocol, such as IEEE, RS 232, and others.

Furthermore, it is proposed that the sensor unit is arranged on the tool carrier unit. Thus, the sensor unit together with the tool carrier unit form a common assembly and handled together. When replacing tool carrier units, therefore, the suitable sensor unit is always automatically available. It is preferably provided that the sensor unit can also be brought into communication connection with the further units via the interface. The embodiment also makes it possible for the sensor unit to be adapted specifically to the tool provided for the tool carrier unit. Thus, it can be ensured that the appropriate tool is used for the appropriate tool, regardless of a position of the tool carrier unit in the tool carrier.

The invention further proposes a sensor unit for the tool supply device which has detection means with which a presence and / or absence of a tool in the recess can be detected through the tool carrier. The detection means are arranged on the underside of the tool carrier, so that they are mechanically protected by the tool carrier. The detection means are in communication with the evaluation unit or further units, for example, so that a corresponding detection signal can be interrogated and evaluated. For this purpose, the detection means can be in wireless communication or wired with the other units in communication. The tool carrier and a detection signal emitted by the detection means are matched to one another such that the presence or absence of the tool can be detected by the tool carrier with the detection signal. For this purpose, it makes sense that the detection signal used interacts as little as possible with the material of the tool carrier, so that the detection signal is changed as little as possible undesirable. In this case, the detection signal should be dimensioned with regard to its energy content only in such a way that the detection means still receives a received signal with sufficient signal strength for the evaluation. This can be the signal strength be adjustable, for example, so that in fact only the really needed energy is sent out. This also makes it easier to meet electromagnetic compatibility requirements or compliance with emitted signal limits, as defined in standardization. In an advantageous manner, the sensor unit can have an identification which can be interrogated stored in it. The identification may be communicated to the control unit during communication so that it can identify the missing and / or existing tool. If a sensor unit is connected to a plurality of detection means for different tools, the sensor unit can have a plurality of identifications associated with the individual detection means. The sensor unit can also transmit the identification associated therewith with the status transmission to the control unit or a respective detection means. Also in this case, the control unit can identify the missing and / or existing tool. By means of the control unit, a display unit can be controlled which displays the type and position of the tools, so that, for example, a current occupancy state of the tool carrier can be permanently monitored. The sensor unit can be designed to be programmable so that it can be provided with one or more identifications as needed. Of course, the programmability includes, if necessary, the assignment of individual identifications to corresponding detection means. In the sensor unit and / or in the control unit can also be deposited an assignment table, by which each tool is assigned its own identification.

According to a development, the detection means on an induction coil. With the induction coil, a magnetic field can be generated, which can be used for the detection of metallic tools. Here, the effect on the so-called self-induction can be detected, with the presence or absence of the tool can be detected. For example, in the case of an induction coil through which a constant current flows, the removal or depositing of the tool in the receptacle of the tool carrier can be determined on the basis of voltage changes. It proves to be particularly advantageous if the tool is magnetic in this case, because this increases the effect on the induced voltage. Of course, the coil can also be operated with a variable voltage or a variable current, in each case the other size is used for detection. In particular, an application with pulsed voltages or with a harmonic electric current, for example a current with sinusoidal course comes into question. The operating conditions The induction coil are advantageously set such that a magnetic field generated by it penetrates the tool carrier largely unattenuated. With metallic tool carriers, corresponding loss factors can be taken into account. The induction coil may be formed by an electrically conductive wire which is wound on a bobbin and connected to a corresponding electronics for control. Depending on the application, the core of the induction coil may have a relative magnetic permeability greater than 1. Preferably, electrically poorly conductive ferrites can be used with which high detection efficiencies can be achieved. The induction coil is thus a cost effective, reliable way to form a detection means.

In addition or in addition, the detection means may comprise an ultrasonic transmitting / receiving unit. The ultrasound transmitting / receiving unit is particularly advantageous if detection is not sufficiently reliable or even impossible with other detection means. The ultrasound transmitting / receiving unit can, for example, have a piezoelectric element, which in turn is suitable both for emitting and for receiving ultrasound. The ultrasound transmitting / receiving unit can be connected to a suitable control unit with which the presence or absence of the tool can be reliably determined from the received signal. The ultrasound transmitting / receiving unit is preferably connected directly to the tool carrier, so that the ultrasound is radiated from the ultrasound transmitting / receiving unit onto the tool carrier and from there in the direction of the tool. The tool carrier thus additionally acts as an antenna in this embodiment.

According to a further embodiment, the detection means to an optical transmitting / receiving unit. This embodiment is particularly suitable for transparent tool carrier, which is at least limited transparency for the optical signal used. Of course, openings can also be provided, through which the optical signal is emitted in the direction of the tool. The openings may be closed with windows to protect the sensor unit from dirt and damage. The optical transmitting / receiving unit may be formed by a light emitting diode photodiode combination or the like.

Of course, different detection means can be used in combination with each other in order to increase the reliability or to better evaluate tool-specific properties for detection.

According to a further advantageous embodiment, the sensor unit is designed tool-specific. With regard to its detection means, the sensor unit is adapted to the tool to be detected. It can thus be provided that the sensor unit has an induction coil in a region in which the tool is metallic, and in an area in which the tool is not metallic, an optical transmitting / receiving unit. In this way, incorrect allocations of the tool carrier can be detected.

According to a further proposal of the invention, the sensor unit is at least partially adapted to a contour of the recess. This allows a further improvement of the detection of the tool can be achieved. This embodiment proves to be particularly advantageous if the recess already has a contour of the tool to be accommodated. In this case, the sensor unit may be formed adapted to the recess. The sensor unit may, for example, surround the recess on its outer circumference and / or be adapted adjacent and / or flat to the shape of the recess, in particular with respect to the bottom. High reliability with low energy consumption can be achieved.

Furthermore, it is proposed that the sensor unit is at least partially formed like a film. This embodiment allows a particularly simple production of the sensor unit, which can be carried out by known mechanical methods. In particular, this process for the production of printed circuit boards and the like can be mentioned. In addition, this embodiment allows a particularly simple connection of the sensor unit with the tool carrier, in particular when the sensor unit is to simulate the contour of the recess. For example, it can be provided that a film-shaped winding of an induction coil is arranged around the recess and connected to it.

Furthermore, it is proposed that the sensor unit has a transmission unit. With the transmission unit, the detected, evaluated signal can be transmitted to another unit. Thus, for example, be provided that the transmission unit detects a detection signal of the evaluation, digitized and transmitted in the form of a digital code to the other units. High reliability can be achieved. In particular, the data transmission can be further improved by means of suitable codings. For this purpose, it may be provided that redundant codings such as Reed-Solomon codes, Fire codes and the like are used. Of course, it can also be provided the control unit communicates with the transmission unit and controls the function of the sensor unit. Controlling the function of the sensor unit may include turning on and off as well as adjusting signal strengths and the like. The communication connection is preferably bidirectional, so that the control unit in the form of a control can adjust the signal strength of the sensor unit as needed.

The invention further proposes a method for operating a sensor unit according to the invention, wherein the sensor unit detects presence and / or absence of the tool through the tool carrier, delivers a signal that can be evaluated by the control unit, the control unit derives from the signal value and / or a signal value change Present and / or absence of the tool determined and outputs a presence or absence signal, which is transmitted to the display unit and / or the Meideeinheit.

The inventive method avoids that the tool must be in direct contact with the sensor unit. In this way, the sensor unit can be arranged spatially spaced from the tool, wherein at the same time the sensor unit can be arranged protected by the tool carrier. The sensor unit can be directly in communication with the control unit. For example, a signal detected by the sensor unit can also be transmitted directly to the control unit and further processed there. From this, the control unit can determine, for example by signal processing, the presence or the absence of the tool. A corresponding signal can be generated and output, which is preferably transmitted to a standing in communication with the control unit display unit and / or reporting unit. Of course, the transmission can be carried out both analog and digital. The transmission can be carried out, for example, via an interface and a suitable interface protocol. The control unit can also operate a plurality of sensor units, evaluate them at the same time or in discrete time succession or in time multiplex and generate a corresponding common signal for all or for a group of sensor units.

According to one embodiment, it is proposed that the sensor unit is supplied with energy by the control unit. In this way, separate power supply units for the sensor units can be saved. The sensor units can therefore be made small and compact. separate Cables and contacts for the power supply can be saved.

According to a development, it is proposed that the sensor unit is controlled by the control unit. In this way, the sensor unit is only in operation when it is activated by the control unit accordingly. This can save energy. Furthermore, EMC requirements (EMC stands for Electromechanical Compatibility) can be met more easily. In addition, by the control unit adapted to the tool to be detected signal strength can be specified. As a result, the detection effect can be further improved.

Furthermore, it is proposed that the sensor unit is controlled in time division multiplex. In this way, the control unit can be simplified because it does not have to be actively in communication with all sensor units at the same time. Time division multiplexing is particularly advantageous in the case of sensor units having a plurality of detection means, wherein the number of evaluation units in the sensor units can be reduced if these are also multiplexed. As required, the evaluation unit is connected to the detection means to be evaluated, at least until the evaluation is completed. Ideally, only a single evaluation unit for all detection means is present. This is in each case connected to the individual detection means in accordance with a predeterminable time rhythm in order to evaluate their signals. It can be provided that the individual detection means are connected to the evaluation unit at regular time intervals. Of course, it can also be provided that an automatic transfer from one detection means to another in a specific sequence is carried out. The handover can also be made dependent on the detection of an evaluable signal.

In a further development, the sensor unit continuously supplies the signal. This allows uninterrupted monitoring of the recess for the presence or absence of the tool.

In addition, it can be provided that the sensor unit supplies the signal in a time-discrete manner. Thus, the sensor unit can deliver the signal at predetermined times, which are adjustable by means of the control unit. In this way, the sensor units can be evaluated, for example via a common communication channel. It may be provided that the sensor unit only supplies a signal to the control unit when the detection signal changes.

In a further development, it is proposed that the sensor unit emits a continuous and / or time-discrete detection signal. The emission of the detection signal can be independent of the signal to the control unit. The detection signal may be transmitted continuously, for example, a continuous ultrasonic signal, a continuous magnetic field, or the like. Of course, the detection signal can be transmitted alternatively or additionally also discrete-time. Thus, the transmission of the detection signal may be clocked, for example, or be superimposed on a continuous detection signal. The reliability of the detection can be further improved.

Furthermore, it is proposed that a static detection signal is sent. Static in the sense of this invention does not mean that the detection signal is represented by a constant level, but may, for example, be a constant level signal or a harmonic signal with constant parameters, such as a sine wave or the like. This embodiment is particularly suitable when dynamic signal changes allow improved detection reliability. For example, it may be provided that the induction coil is operated with alternating current. If, for example, a ferromagnetic tool enters the region of the induction coil, then either the frequency and / or the amplitude of the current and / or voltage of the coil will change due to the inductance increase. This signal can be evaluated accordingly.

According to a further embodiment, the detection signal can be changed. The detection signal can for example be adapted to a corresponding state. For example, with an existing tool, the signal strength of the detection signal may be set differently than an absent tool.

In a further embodiment, it is proposed that a pulse-shaped and / or at least partially periodic detection signal is used. The detection signal can consist, for example, of a sequence of pulses, which moreover can have identical and / or alternating polarities. The pulses are preferably adapted to the sensor unit and the tool to be detected. Of course, a partially periodic detection signal may also be used, which is formed of, for example, oscillation portions of a sine wave, a square wave, a triangle wave, or the like. The individual oscillations can be interrupted by areas with a detection signal of constant value. Reliability and Function can be further improved.

Advantageously, the invention also proposes that the detection signal is adjusted by means of the control unit. In this way, an optimization between signal generation and detection reliability can be achieved. In a particularly advantageous manner, for example, cycle times, pause times, pulse shapes and periodicity, frequency, amplitudes and the like can be set.

In addition, it is proposed that an individualized arrival or absence signal is used on the sensor unit side. In this way, the control unit can always determine which of the tools to be detected is missing. A corresponding message can be sent to the message unit and / or a central office. Usability can be further improved.

Further advantages and features will be apparent from the following description of two embodiments. Substantially identical components are designated by the same reference numerals. Furthermore, reference is made to the description of the exemplary embodiment in FIG. 1 with regard to the same features and functions. The drawings are schematic drawings and are merely illustrative of the following embodiments.

Fig. 1

einen Werkzeugträgereinsatz für einen Werkzeugträger eines Werkzeugschranks gemäß der Erfindung,

Fig. 2

eine Schnittansicht des Werkzeugträgereinsatzes gemäß Fig. 1,

Fig. 3

eine Rückansicht des Werkzeugträgereinsatzes gemäß Fig. 1,

Fig. 4

schematisch eine Darstellung der Kommunikationsverbindungen innerhalb des Werkzeugträgers,

Fig. 5

schematisch ein funktionsorientiertes Prinzipschaltbild der vorliegenden Erfindung,

Fig. 6

einen Werkzeugschrank mit einem Werkzeugträger gemäß der vorliegenden Erfindung,

Fig. 7

eine weitere Ausführungsform gemäß der Erfindung mit einem Werkzeugträger und

Fig.8

eine schematische Ansicht von in einer Werkzeugschublade angeordneten und verschalteten Werkzeugträgern.

Show it:

Fig. 1

a tool carrier insert for a tool carrier of a tool cabinet according to the invention,

Fig. 2

a sectional view of the tool carrier insert according to FIG. 1,

Fig. 3

a rear view of the tool carrier insert according to FIG. 1,

Fig. 4

schematically a representation of the communication connections within the tool carrier,

Fig. 5

schematically a function-oriented block diagram of the present invention,

Fig. 6

a tool cabinet with a tool carrier according to the present invention,

Fig. 7

a further embodiment according to the invention with a tool carrier and

Figure 8

a schematic view arranged in a tool drawer and interconnected tool carriers.

1 shows a tool carrier insert 34, which forms a tool carrier unit and has recesses 14, 16 for receiving a hammer 18 or a combination pliers 20. The tool carrier insert 34 is in the present case formed from a stainless steel sheet, which has a wall thickness of about 0.5 mm. In an unspecified edge region, an interface 36 for producing a radio link to an arranged on a tool carrier 12 opposite interface 44 is arranged on the tool carrier insert 34. The interface 44 is provided on the tool carrier 12 at the point at which the interface 36 of the tool carrier insert 34 is located (FIG. 6). The tool holder 12 has for each tool carrier insert 34 has a corresponding interface 44, which are formed identical in the present case. The individual interfaces 44 are connected to a bus 46, which in turn communicates with a control unit 28 (FIGS. 4, 5).

FIG. 2 shows the tool carrier insert 34 according to FIG. 1 in a sectional view. It can be seen here that induction coils 24, 26 are arranged as detection means below the recesses 14, 16 on a side 22, which is opposite a tool receiving side. In order to protect the induction coils 24, 26 from mechanical effects, they are attached to the side 22 with silicone adhesive.

FIG. 3 shows the tool carrier insert 34 according to FIG. 1 in a rear view. It can be seen here that the induction coils 24, 26 are located in a region of the recesses 14, 16 in which the tools are of metal design. The mode of action and the function of the detection will be described in detail later.

From Fig. 3 it can also be seen that the induction coils 24, 26 are connected via connecting lines 50 to the sensor unit 38, which they are assigned. The sensor unit 38 has an electronic circuit, not shown, with which the induction coils 24, 26 are controlled in a suitable manner, so that it can be detected whether the corresponding tool 18, 20 is present in the corresponding recess 14, 16 or not. The Sensor unit 38 also has a transmission unit 40, which processes the detection signals detected by sensor unit 38 for transmission to control unit 28 and controls interface 36.

In the present embodiment, it is contemplated that the interface 36, 44 represents a near-end radio interface based on a corresponding near-end radio protocol, such as Blue-Tooth, IEC 14443, or the like.

The interface 36 is located in the tool carrier 12 opposite the mating interface 44, by means of a communication link between the sensor unit 38 and the control unit 28 can be made. In the present embodiment, it is provided that the communication connection between the control unit 28 and the sensor units 38 is bidirectional. The individual interfaces 44 of the tool carrier 12 are connected via a bus 46 to the control unit 28 in communication. The data transmission over the bus 46 is done digitally according to an interface protocol such as IEEE, RS 232 or the like.

The individual tool carrier inserts 34 are fixed in the tool carrier 12 by means not shown snap fasteners. As shown in FIG. 6, the tool carrier 12 is arranged in a tool cabinet 10. The tool cabinet 10 also has, in addition to the control unit 28, a pushbutton 42 and a beacon 32. By pressing the push button 42, the beacon 32 can be activated. In this way, it is possible to visually already check the completeness of the tool cabinet on site. Once a tool is removed, the operation of the push button 42 causes the flashing beacon 32 lights. When the pushbutton 42 is released, the luminaire 32 goes out. Only when all the tools are present in the recesses provided for the tool carrier inserts 34 does the actuation of the pushbutton 42 not result in the flashing beacon 32 lighting up. This embodiment with the pushbutton 42 has the advantage of that only on request the beacon 32 is active. This can save energy.

5 shows a schematic functional representation of the signal flow according to the present invention. The induction coils 24, 26 are electrically connected by means of lines 50 to the sensor unit 38. About an unspecified electronics of the sensor unit 38, the induction coils 24, 26 are controlled as needed. The electronics form the evaluation unit, with which the detection signal is detected and evaluated.

The transmission unit 40 is functionally associated with the interface 36 and organizes the data exchange between the sensor unit 38 via the interface 36 to the control unit 28. For this purpose, the interface 36 is in close radio communication with the interface 44, which in turn supplies the data via the bus 46 to the control unit 28 , Conversely, commands from the control unit 28 are transmitted via the bus 46, the interfaces 44, 36, the transmission unit 40 to the sensor unit 38. In addition, the control unit 28 is in communication communication with a central computer 30 via a further remote radio connection. The control unit 28 also provides a signal to the push button 42, which allows the operation of the beacon 32. This signal is active when at least one of the tools 18, 20 is not arranged in the recesses 14, 16 provided for this purpose. In order for the beacon 32 can be active, a manual operation of the push-button 42 is required.

In the present embodiment, the induction coil 24, 26 of the sensor unit 38 is operated with a square wave voltage having a frequency of about 5 kHz. Depending on the tool and properties of the material of the tool carrier insert 34, the frequency can also be selected in a range of up to 50 kHz, preferably in a range of 22 to 30 kHz, particularly preferably in a range of about 25 kHz. The latter frequency has the advantage that it lies well above the audible range and thus can not cause acoustic interference to personnel and the like. When using an electrically non-conductive tool carrier insert, the frequency can also be chosen significantly higher, for example in a range of about 1.8 MHz to 500 MHz, preferably about 25 MHz to 300 MHz. Particularly preferred are frequency ranges that are released for industrial applications, for example in the range of 27 MHz, 466 MHz or the like. Due to the voltage applied to the induction coil 24, 26 fixed predetermined square-wave alternating voltage, an AC waveform, the amplitude of the presence or absence of the tool 18, 20 is dependent. Due to the appropriate choice of frequency, the effects can be detected by the material of the tool carrier insert 34 and largely compensated. If, for example, the hammer 18 is inserted into its recess 14, the metallic hammer head of the hammer 18 causes a change in the inductance of the induction coil 24, which leads to the fact that the current profile also changes according to the law of induction. This change can be detected and evaluated by the sensor unit 38, so that a corresponding signal is transmitted to the control unit 28.

The hammer 18 used here has a cast hammer head which is magnetically permeable. Due to the magnetic properties of the hammer head, the inductance of the induction coil 24 increases, so that the current amplitude of the alternating current decreases accordingly. This lower level of the alternating current can be detected and evaluated by means of an ammeter. In principle, in the same way, the induction coil 26 functions to detect the combination pliers 20. Frequently, the pliers head of the combination pliers 20 is also magnetic, so that magnetic parts can be easily detected and held with the pliers. This property is also used for the detection of the combi-pliers 20, the operating principle substantially corresponding to that with respect to the hammer 18.

The sensor unit 38 generates the corresponding control voltages for the coils 24, 26 in succession for each of the induction coils 24, 26. In this way, a common evaluation unit can be used, which is in each case connected to the alternating voltage applied to the coil 24, 26. In this way, only one evaluation unit for the current measurement and the state determination is required. In addition, the sensor unit 38 has a controller, not shown, which allows an intermittent operation. In this way it can be achieved that the induction coils 24, 26 do not have to be permanently charged with AC voltage. Furthermore, the controller can specify a measuring time or a measuring interval in which the sensor unit 38 carries out the measurement accordingly. For this purpose, in the present embodiment, the controller receives corresponding commands from the control unit. In the present embodiment, it is provided that the measurement times occur at intervals of about 40 to about 45 sec. Of course, the times can also be made adjustable and changed over a wide range. Thus, measuring times can also be spaced over a time interval of 1 minute, 5 minutes, 10 minutes or more. In order not to consume energy, the measurement duration should only be dimensioned for a period of time which is absolutely necessary in order to reliably detect the presence or absence of the tool 18, 20. In the present embodiment, it is provided that the duration of the measurement interval is selected in a range of about 0.1 to 2.5 seconds, preferably in a range of about 0.5 to 1.1 seconds, and more preferably in a range of about 0.75 sec. When selecting the duration of the measurement interval transient phenomena should be taken into account accordingly, so that a determination of the presence state of the tool 18, 20 can be reliably determined.

In the present embodiment, not only the measurement times, but also the interval lengths can be specified. In addition, the control unit 28 allows the specification of the times adapted to the respective measuring method and to the respective tool 18, 20 to be detected.

The result of the detection is transmitted from the sensor unit 38 via the transmission unit 40, the interfaces 36, 44, the bus 46 to the control unit 28. Here, the measurement results and the times at which the measurements were made are stored. In addition, the results are transmitted via the radio link 48 to the central computer 30. In this way, the current state of charge of the tool delivery device 10 can be monitored in a control center.

FIG. 7 shows a further embodiment of the present invention with a tool carrier 52 made of plastic (PA), which, like the tool carrier unit 34 in the aforementioned example, has a recess for a hammer 18 and a recess for a combination tong 20. The tool carrier 52 is shown in Fig. 7 back and has a connector 58 which is communicatively connected via a unspecified line with a transmission unit 40 arranged on a tool carrier 52 sensor unit 38. As in the previous example, the recesses are provided with induction coils 24, 26 which are communicatively connected to lines 50 to the sensor unit 38. The tool carrier 52 is provided for arrangement in a tool drawer, wherein the tool drawer for the arrangement of three tool carriers 52 is formed side by side. In the tool drawer, not shown, a bus 46 is arranged in the form of a line, the connector 56 for connection to the connectors 58 of the tool carrier 52 has. The interface with respect to the plug connectors 56, 58 is an IEEE interface 54, by means of which the tool carriers 52 are in communication connection with the control unit 28 arranged outside the tool carrier 52 in this exemplary embodiment. The control unit 28 is formed in the present embodiment by a local computer in the vicinity of the tool drawer. With regard to the other functions, in particular for detection and communication, reference is made to the preceding exemplary embodiment.

The sensor unit 38 is programmable. In particular, it is provided that a separate identification is provided for each induction coil, which has the form of an alphanumeric string. The present embodiment makes it possible to customize the identification, so that a simple conversion and / or retrofitting of the tool drawer can be done. Preferably, the identification corresponds to a tool number which is engraved or embossed, for example, in the tool.

As in the previous embodiment, the induction coils are interrogated time-discretely successively to determine whether the tool 18, 20 is present in the respective recess or not. In contrast to the preceding embodiment, the frequency of the voltage to be applied to the coils 24, 26 is in the range of approximately 27 MHz. The sensor unit 38 is adapted accordingly for this purpose. The status information is transmitted to the control unit 28 via the transmission unit 40, the connectors 56, 58 and the IEEE interface 54. During the transmission, the associated identification of the induction coil is additionally transmitted, so that the control unit 28 can identify which tool is present or is missing in the tool carrier 52. The control unit 28 is also in communication with a non-illustrated graphical display unit, which visually displays the individual positions of the recesses of the tool holder 52. In the present embodiment it is provided that a missing tool is represented by a red signaling on the display unit. Existing tools are represented by a black signal. For better illustration, it may also be provided that the representation of the absent tools is flashing.

In the present embodiment, it is further provided that the transmission unit stores information about which tools it is intended for. This information is transmitted to the control unit 28 on request. In this way, the control unit 28 can keep track of which tools and for which number of tools the tool drawer is provided. If there is an exchange of tool carriers 52, an automatic initialization takes place in that the sensor unit transmits its stored information to the control unit. The replaced tool carrier is deleted from a guided in the control unit 28 tool carrier list. This process can be performed automatically.

The in Figs. illustrated embodiments are only illustrative of the invention and are not limiting for this. Thus, of course, the sensors can be selected as needed adapted to the tool to be detected. Of course, instead of induction coils also optical or capacitive sensors are used. Capacitive sensors are particularly suitable when the tool carrier or the tool carrier insert is formed from an electrically non-conductive material such as plastic or the like. In addition, of course, the sensor unit can be adapted to improve the detection of the shape or surround this contour. The embodiments can be equally applied to tool carriers and tool carrier units, which are at least partially made of plastic, ceramic or the like, in particular PVC, PE, PPE, PA, ABS and others, and combinations thereof or composite materials, preferably fiber-reinforced composite materials. In the latter case, the fiber reinforcement may be formed by glass fibers, plastic fibers, carbon fibers, mixtures thereof, or the like.

LIST OF REFERENCE NUMBERS

10

tool cabinet

12

tool carrier

14

recess

16

recess

18

hammer

20

pliers

22

page

24

induction coil

26

induction coil

28

control unit

30

mainframe

32

Rundumleuchte

34

Tool carrier insert

36

interface

38

sensor unit

40

transmission unit

42

pushbutton

44

interface

46

BUS

48

radio link

50

management

52

tool carrier

54

IEEE interface

56

Connectors

58

Connectors

Claims (31)

Tool providing device (10) with a tool carrier (12) having a recess (14, 16) for receiving a tool, in particular a hand tool (18, 20),
characterized,
in that a sensor unit (38) is arranged on an opposite side (22) of the tool carrier (12) on the tool-side recess (14, 16). Tool supply device according to claim 1, characterized in that the tool carrier (12) made of plastic and / or of an electrically conductive material, in particular metal, particularly preferably a non-magnetic metal is formed. Tool providing device according to claim 1 or 2, characterized in that the sensor unit (38) is in operative connection with the tool carrier (12). Tool supply device according to one of claims 1 to 3, characterized in that the operative connection is elastic. Tool supply device according to one of claims 1 to 4, characterized by a control unit (28). Tool supply device according to one of claims 1 to 5, characterized by a display unit (32). Tool supply device according to one of claims 1 to 6, characterized by a reporting unit (30). Tool supply device according to one of claims 5 to 7, characterized in that the sensor unit (38), the control unit (28), the display unit (32) and / or the reporting unit (30) are wired and / or wirelessly in communication with each other. Tool supply device according to one of claims 1 to 8, characterized in that the tool carrier (12) has at least one separable tool carrier unit (34). Tool supply device according to claim 9, characterized in that the tool carrier unit (34) has an interface (36) for establishing a communication connection between the tool carrier and the tool carrier unit. Tool providing device according to claim 9 or 10, characterized in that the sensor unit (38) on the tool carrier unit (34) is arranged. Sensor unit for a tool delivery device (10) according to one of claims 1 to 11, characterized by detection means (24, 26), with which a presence and / or absence of a tool (18, 20) in the recess (14, 16) by the tool carrier (12) is detectable through. Sensor unit according to claim 12, characterized in that the detection means (24, 26) have an induction coil. Sensor unit according to claim 12 or 13, characterized in that the detection means comprise an ultrasonic transmitting / receiving unit. Sensor unit according to one of claims 12 to 14, characterized in that the detection means comprise an optical transmitting / receiving unit. Sensor unit according to one of claims 12 to 15, characterized by a tool-specific training. Sensor unit according to one of claims 12 to 16, characterized by an at least partially adapted to a contour of the recess (14, 16) shaping. Sensor unit according to one of claims 12 to 17, characterized by an at least partially film-like design. Sensor unit according to one of claims 12 to 18, characterized by a transmission unit (40). A method of operating a sensor unit (38) according to any one of claims 12 to 19, characterized in that the sensor unit (38) detects presence and / or absence of the tool (18, 20) through the tool carrier (12), one of The control unit (28) determines from a signal value and / or a signal value change the presence and / or absence of the tool (18, 20) and outputs a reference or absence signal which is sent to the display unit (32) and / or the reporting unit (30) is transmitted. A method according to claim 20, characterized in that the sensor unit (38) is supplied by the control unit (28) with energy. A method according to claim 20 or 21, characterized in that the sensor unit (38) is controlled by the control unit (28). Method according to one of claims 20 to 22, characterized in that the sensor unit (38) is controlled in time division. Method according to one of claims 20 to 23, characterized in that the sensor unit (38) continuously supplies the signal. Method according to one of Claims 20 to 24, characterized in that the sensor unit (38) delivers the signal in a time-discrete manner. Method according to one of claims 20 to 25, characterized in that the sensor unit (38) emits a continuous and / or time-discrete detection signal. A method according to claim 26, characterized in that a static detection signal is used. A method according to claim 26, characterized in that the detection signal is changed. A method according to claim 28, characterized in that a pulse-shaped and / or at least partially periodic detection signal is used. Method according to one of Claims 26 to 29, characterized in that the detection signal is set by means of the control unit (28). Method according to one of Claims 20 to 30, characterized in that an individualized arrival or absence signal is used on the sensor unit side.

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