WO1988001185A1

WO1988001185A1 - Training apparatus

Info

Publication number: WO1988001185A1
Application number: PCT/DE1987/000369
Authority: WO
Inventors: Horst Smeets
Original assignee: Horst Smeets
Priority date: 1986-08-19
Filing date: 1987-08-19
Publication date: 1988-02-25
Also published as: EP0328519A1; AU7809987A; DD261526A5; DE8622196U1

Abstract

In a training device for developing and strengthening the muscles and joints of a person by means of back and forth movements under load, the latter is produced by a reversible electric motor (20) which can be braked beyond the stationary position, the terminal voltage of which can be continuously increased by a driving device (60) and the output moment of which can be transformed by a reducing gear (28, 30) into a linear force that puts under pressure the person performing the exercises. The motor (20) is suitably a direct-current motor with constant-speed characteristics and has a stator with permanent magnetic poles. This training apparatus allows the load to be easily adapted to the person doing the exercises and to the exercise being done, if necessary by preprogramming.

Description

Description training device

The invention relates to a training device for developing and strengthening the muscles and joints of an exercise person through back and forth movements under load.

Such devices, known in practice as body building devices or power machines, are known in which the load is formed by weights. These weights, which are usually guided on rods, consist of individual elements of equal weight, which can be combined in any number to form a block, depending on the desired load. In the rest position, such a block is located at the lower end of a vertical guideway. Depending on the type of exercise and training purpose, the weights are more or less frequently pulled up and down again from their rest position by means of a handle and ropes which are fastened to the weight block and deflected by rollers at the upper end of the guideway.

Since such strength machines are used in so-called training centers by people with different physical constitution, the number of weights usually has to be changed from person to person so that each exerciser can achieve optimal training success according to his muscles. The same applies to a person who wants to carry out different exercises with different loads on the same device. In addition to the tediousness of such changes and the associated constant interruption of the exercise sequence, there is also the risk of injuries when attaching and detaching and when transporting the weight elements. This also creates dust and dirt, especially since the weight elements made primarily from cast iron tend to corrode and must be lubricated with grease on the guide rods for the purpose of better sliding.

Furthermore, such training devices have no possibility, in the case of overexertion or a sudden consciousness. his / her disorder to prevent the weights from suddenly falling back. In addition to the resulting considerable noise, which can cause dangerous shock effects for other practitioners, the handle snaps back into its starting position and can severely injure the practitioner himself and other people who are in his vicinity. Finally, such devices only allow loads in one direction instead of the frequently desired alternating stress on the muscles.

Training devices are also known in which springs, mostly tension springs, are used instead of weights. The disadvantages of such devices are essentially the same as for the devices described above that work with weight elements. Adapting to individual load requirements is often even more difficult and only possible with considerable effort - apart from the difficulties of changing the springs, these cannot be combined to the same extent as weights. In order to be able to correspond to each load case, a large number of springs must therefore be kept available, which, in addition to requiring considerable space, also entails a high capital expenditure.

In addition, training devices are known in which the movement of the exercising person is opposed by a braking torque by one or more hydraulic or pneumatic power cylinders. This type of power machine allows the muscles to be subjected to changing loads; however, such devices are characterized by a high level of technical complexity and high maintenance requirements, so that they are often out of the question for training studios for commercial reasons -

In the case of bicycle trainers, it is also known to drive a generator using the pedal cranks, the electrical power of which is destroyed in resistors. This type of load can only be transferred to reciprocating movements with great effort. All the devices described so far also have in common that the trainee must overcome a breakaway torque that is added to the respective counterforce at the start of the movement. This breakaway torque is caused by the individual moving and non-moving parts of the device sticking together. Since the system is at rest before the movement, adhesion occurs in the devices with weights between these and the guides through the connection of the dirt with lubricants. The breakaway torque occurs on the power machines that are equipped with hydraulic or pneumatic power cylinders. tightly tolerated movement seals of the piston and the piston rod. The people who train on such devices regularly move at their performance limit, so that this breakaway torque represents an unwanted additional load that can lead to strains or other injuries. Even if the breakaway torque is overcome without damage, the load is not uniform over the entire range of motion, as is necessary for optimal training success, but changes abruptly.

The invention has for its object to provide a training device of the type mentioned, which avoids the disadvantages of the known devices and an individual adaptation of the load to the exercise person and the exercise to be carried out by the latter in a simple manner with the exclusion of any injury allowed.

According to the invention, this object is achieved in that a reversible electric motor which can be braked beyond standstill is provided for generating the load, the terminal voltage of which can be steplessly increased by means of a control unit, and its output torque via a transmission into a linear force loading the person exercising is convertible.

By generating the load according to the invention with the aid of an electric motor that can be braked beyond standstill Clamp voltage can be continuously adjusted, the adaptation of the training device to the respective exercise person and their respective exercise becomes particularly simple, since only the control device has to be controlled accordingly. The use of an electric motor instead of weights also allows the device to be used in any position, and there is no longer any risk of injury when the handle which transfers the load to the exercise person is suddenly released, since the motor moves the deflected parts more or less slowly depending on its speed leads back to its rest position, which also eliminates the risk of shock effects from noise. There is also no breakaway torque, since the motor moves the driven part of the device even before the exercising person develops their strength, this movement initially running in the opposite direction to the direction desired for the respective exercise and then * with the development of force takes place e _* ine reversal in this te desired direction changed at .welcher the direction of rotation of the motor, thereby braking the engine is placed in the region of the countercurrent.

Particularly suitable as a motor for generating the load according to the invention is a direct current motor with a shunt characteristic, which expediently has a stator with permanent magnetic poles.

To control such a DC motor, in a further embodiment of the invention, the control unit contains a transformer that can be connected to an AC network with stepless regulation of the secondary voltage and a full-wave rectifier connected to the secondary winding of the transformer, the output voltage of which is led to the terminals of the DC motor.

According to another feature for developing the invention, the gear is a nut screw gear without self-locking. Around To keep the friction of the gear as small as possible, the nut screw gear is preferably equipped with a ball screw nut. By using a ball nut in connection with a correspondingly designed ball screw, the friction occurring in the gearbox is kept extremely small. With a restriction, a trapezoidal screw with a correspondingly adjusted nut can be used instead, which significantly increases the structure of the gearbox cheaper.

For guiding and Drehsicheruπg the nut of the drive Mutternschraubge- this assigns appropriate ange¬ in the center of a crosspiece whose ends are supported on longitudinal guides of a machine frame against rotation about the ^{'transmission} axis. Here, too, it is advantageous if, in order to reduce the friction, the longitudinal guides are formed by ball bearings that are displaceable on rails fixed to the frame. '.

In a further embodiment of the invention, the aforementioned traverse can be provided with devices for attaching interchangeable handles for the exercise person. With this arrangement, a simple device with preferably a vertical frame can be created. B. pulling and pushing the arms or bending the knees while supporting the shoulders can be carried out against a corresponding handle on the traverse.

With regard to the safety and the protection of the transmission and the electric motor against soiling, however, it is preferable according to a particular embodiment of the invention that the nut screw transmission with the electric motor is encapsulated within the device frame and that at the ends of the cross member via rollers in the exercise areas endless ropes of the device are connected to which devices for attaching handles for the exercise person are attached. Such a design of the device allows in particular in particular, to implement the device with an L-shaped frame, in the horizontal part of which extends on the floor, the nut screw drive with the electric motor is accommodated below a lying surface for the exercise person and whose vertical part is designed as an open portal, with sections of the endless cables run on both sides of the lying surface and on both sides of the portal opening over the length of the frame legs. Such an angular device construction in conjunction with handles which can be attached to both the horizontal cable sections and the vertical cable sections and which can be exchanged as interchangeable sets enables the implementation of the most varied exercises for training almost all muscles and joints and creates a real universal device that can be adapted to a wide range of exercise persons and a wide variety of exercises in connection with the stepless regulation of the engine torque. ■

The shear forces or shear force components which sometimes occur in such exercises are intercepted in a further development of the above-mentioned device design in that the devices attached to the ropes for guiding the handles on the device frame are guided linearly. Such a guide can be implemented particularly expediently in that the devices attached to the cables are provided with open ball guide bushings which slide on guide rails attached to the device frame.

As stated above, the electric motor generating the load is reversible, that is, it can be changed in its direction of rotation. Such a reversal of the direction of rotation is not necessary for a simple exercise, for example a pulling or lifting exercise, if the exercise is carried out correctly, because after each loading stroke in which the motor is braked beyond standstill and moved in the opposite direction of rotation, the motor by itself through de Relief runs in its actual drive direction and returns the handle to the starting position. In many cases, however, it will be desirable to reverse the direction of rotation of the motor after such an end position has been reached, in order to thereby move the transmission with the handle into the opposite end position or at least closer to the exercise person. For this purpose, the control device according to another embodiment feature of the invention contains a switching device for the direction of rotation of the electric motor, and the device is provided with signaling means, of which the switching device can be controlled at the ends of the back and forth movement.

Such signaling means can be formed by fixed or also mechanically adjustable limit switches. However, it is particularly expedient to form the signaling means by means of a transducer which can be inductively influenced by the motor or transmission shaft and to provide the control unit with a pulse counter which measures the pulses delivered by the transducer as a measure of the length of the back and forth - movement counts. In connection with such a pulse counter, the length and / or position of the to-and-fro movement can be adjusted without any mechanical intervention in adaptation to, for example, the body size of the exercise person and the exercise to be carried out in each case.

Furthermore, the control unit expediently contains a current sensor which, when the current consumption of the electric motor drops under its idling current, controls the switching device for the direction of rotation of the electric motor. With such a current sensor, the direction of loading can be reversed in a direct succession by merely changing the movement.

Yet another design feature of the invention provides that the control unit with a display and / or recording The device for the motor current is provided as a measure of the force exerted by the training person. With the help of such a display and / or recording device, the _* load level and the number of exercise cycles already carried out can be displayed. In addition, the trainee can query further measured values via such a display. In the case of devices working with ropes, the load distribution to the left and right ropes for comparing muscles symmetrically to the longitudinal axis of the body can also be determined particularly expediently in that the endless ropes are connected to the crossbar via elastic members , the elongation of which can be detected by measuring sensors and which are fed to the display and / or recording device. "

According to a last design feature of the invention, the control unit for personal and / or exercise-related setting of the terminal voltage of the motor ^" and possibly the length and / or position of the back and forth movement and further parameters is programmable with the aid of an electronic computer. In this way, for example, several exercises with a different load level and a different load cycle can be preselected for a single exercise person, or the device can be preset for a number of people who train on the device in immediate succession equip read, storage, _recording, and printing element. Each of the device practitioner then receives a provided with a magnetic stripe card that contains all important for his training program information. Before the start of training, the card is inserted into the reader, and the Ste The device is adjusted to the corresponding voltage for the motor. After the end of the exercise, the electronic control saves the number of exercises performed and, if so done, any changes in the load made during the exercise by manual entry by registering again on the card. Such a device It is then ideally suited for rehabilitation centers, where the individual exercises are pre-programmed on the card in advance, depending on the diagnosed diagnosis, and their success is later monitored.

The invention is explained in more detail below in connection with the drawing using two exemplary embodiments. Show it:

Fig. 1 is a front view of a first

Training devices according to the invention with a straight vertical frame;

2 is a side view of the device of FIG. 1,

Fig .. 3 is a plan Looks-up ^'the device according to

Fig. 3,

4 shows a diagram in which the current consumption and the rotational speed of the electric motor are plotted against the torque developed on the output shaft for various terminal voltages on the motor,

5 shows the side view of a further training device according to the invention with an L-shaped angled frame,

Fig. 6 is a front view of the device

Fig. 5,

Fig. 7 is a plan view of the device

Fig. 5, the portal-like formed vertical frame part according to line VII-VII in FIG

FIG. 8 on a larger scale a vertical cross section along line VIII-VIII in FIG. 5.

The training device shown in FLguxen 1 to 3 is a heat or steel device with a vertical frame 10, the vertical frame sides 12 of which are made of profiled steel and are connected to one another at the upper end by a cross member 14 and at the lower end by a cross member 16. Furthermore, there is a further transverse part 18 in the frame 10 at a distance from the lower transverse part 16, to which an electric motor 20 is flanged, the output shaft 22 of which extends through an opening in the transverse part 18.

Between the cross members 14 and 18, two guide rods 22 extend within the frame near the frame sides 12, on which a cross member 24 with ball bushings 26 is mounted for longitudinal displacement.

The cross member 24 also contains in its center a Kugelumlauf¬ nut 28 through which a threaded spindle 30 extends. The threaded spindle 30 is mounted in the upper frame cross part 14 by means of a bearing 32 and in a fourth cross part 34 above the cross part 18 by means of a bearing 36 and with its end protruding downward from the cross part 34 by means of a coupling 38 with the shaft 40 of the electric motor pelt.

The traverse 24 is provided with screw or plug-in openings for attaching various handles 42 (FIG. 2), which an exercise person standing or sitting in the frame 10 with the hands, shoulders or other parts of the body, depending on the type of exercise desired detected. Can also at the Openings 42 ropes 43 (FIG. 2) are fastened, which run over rollers 44 above the upper frame cross part 14 and possibly further rollers 46, 48 (FIG. 2) and are provided at the ends with handles 50 in order to withstand tensile forces at any angle to exercise the framework.

As further shown in FIG. 2, the frame 10, in particular in the lower area, can in turn be equipped with support means such as a table or bench-like stem 52 in order to form a seating or lying surface for the exercise person. These support means are preferably attached to the frame 10 in an easily detachable manner and permit an easy exchange of different constructions.

Finally, an operating panel 56 is suspended from an arm 54 which is pivotally mounted on the frame cross part 14 and projects to the side, with which the exercise person changes the terminal tension of the electric motor 20 during training and thereby the load under which a specific exercise is carried out , can adjust.

The electric motor 20 is preferably a direct current motor with a shunt characteristic, in particular a motor, the stator of which is equipped with permanent magnetic poles, so that the electromagnetic field occurring between the poles and the armature is independent of the terminal voltage of the motor.

An electrical control device 60, which is only schematically indicated, serves for the voltage supply of the electric motor 20, which mainly contains a transformer 62 which can be connected to a conventional AC network and a full-wave rectifier 64 connected to the secondary winding of the transformer. The transformer is a regulating transformer and permits stepless regulation of the secondary voltage and thus also the rectified output voltage of the full-wave rectifier with which the electric motor 20 is is fed. The control range begins at a voltage of 0 volts or at least almost 0 volts, so that when the control unit is switched on, a state can be reached in which the motor 20 does not yet start to rotate due to the friction in the bearings and in the nut screw transmission. As the terminal voltage of the motor 20 on the control transformer increases, the torque generated by the electric motor 20 will finally overcome the abovementioned friction forces and, by rotating the threaded spindle 30, set the cross member 24 up or down, depending on the direction of rotation (n> 0).

If an exercise person with the help of one or more hands directly or indirectly attached to the cross member 24 has attempted to brake the cross member 24 and pull or push it in the opposite direction, the electric motor 20 becomes as shown in the diagram 5 shows, with increasing current consumption, opposing an increasing torque M, which is converted into a linear loading force for the exercise person via the nut screw drive. The faster such a counter-movement to the drive direction (n <0) is carried out, the greater the torque of the motor and thus the loading force will increase, with the motor current I also increasing at the same time.

This loading force can now be increased further, and adapted to the condition of the exercise person, that the voltage U is increased further with the aid of the regulating transformer. Although this will initially lead to a faster movement of the traverse in the drive direction of the motor, the person exercising will brake the traverse again with the correct setting of the motor voltage and be able to move it in the opposite direction (n- £ 0).

For example, the exercise person has by pulling the handle 50 (FIG. 2) the cross member 24 is pulled against the downward driving force of the motor 20 to the upper end position, it suffices to slowly let go of the handle 50 in a subsequent relaxation phase, whereby the motor automatically moves the cross member via the nut screw transmission without reversing the polarity of the terminal voltage in the lower starting position.

The direction of rotation of the electric motor 20 is reversible, which can be done in a simple manner in a DC motor by reversing the polarity at the motor terminals. For this purpose, control unit 60 is provided with a direction of rotation switch (not shown).

In addition, the device can be equipped with conventional limit switches which stop the DC motor 20 when the traverse 24 reaches one or the other end position or switch over in the other direction of rotation. Such limit switches can be attached to the frame cross members 14 and 34 and can be actuated directly mechanically by the cross member 24. However, it is much more advantageous to continue to measure the stroke of the crossmember 24 electronically with the motor stopped or reversing the direction of rotation as a function of this measurement result, as a result of which a free choice of the end positions and thus the length and position of the stroke range to be carried out is possible. Such a measurement can be carried out, for example, by attaching a flag 66 to the clutch 38 or by toothing one of the two clutch parts in order thereby to inductively control a frame-fixed transducer 68 which delivers counting pulses to a counter contained in the control unit 60. Such pulse counting circuits are generally known and therefore do not require any special explanation in the context of this application.

As can be seen from the diagram according to FIG. Support of the torque generated on the armature of the motor 20 with simultaneous increase in the speed in the drive direction to a decrease in the motor current consumption and finally a reversal of the current direction in the generator area. This property of the motor can be used in conjunction with a suitable current sensor to switch the running direction of the motor and thereby counteract the counter-current braking torque of the motor with the force of the exercise person initially supporting the motor. In this way, a load which changes in direction can be created for the exercising person, in which, for example, a pulling movement under load is immediately followed by a pushing movement under load and this interplay continues.

The current consumption and the number of motion games can also be recorded, registered and displayed or printed out on paper by an electronic monitoring device (not shown), as was already explained in more detail at the beginning. By designing such an electronic monitoring device as a computer, the device can be programmed in the manner described above for each exercise person and each exercise to be carried out or an entire exercise cycle.

In the embodiment of a training device according to the invention shown in FIGS. 5 to 8, the frame 100 is L-shaped and has a box-shaped horizontal part 102, which extends directly over the floor at the installation site, and a vertical part 104, which consists of four columns 106 with a rectangular box profile, the lower ends of which are fastened to the horizontal frame part 102 and the upper ends of which are united by a frame-shaped end part 108 to form a rigid construction.

With its upper side 110, the horizontal frame part 102 forms a sitting or lying surface for the operator, and the portal formed by the columns 106 and the frame-shaped end part 108 is dimensioned such that the exerciser can perform exercises in front of the portal and on the other hand for other exercises such as squats with a load shoulders can step into the portal.

As shown in FIG. 8, the box-shaped frame part 102 consists of: an upper wall 112, a lower wall 114 and two side walls 116 which enclose an elongated cavity 118 of rectangular cross section. The cavity 118 is closed off at the front end of the horizontal frame part 102 by a wall 120 which contains a bearing 122 for an elongated threaded spindle 124. The threaded spindle 124 extends over the entire length of the lying surface 110 and is mounted in a second bearing 126 at the beginning of the vertical frame part 104. Below the vertical frame part 104, a direct current motor -128 similar to the motor 20 according to FIG. 1 is arranged in the cavity 118, the output shaft 130 of which is aligned with the threaded spindle 124 and non-rotatably connected via a coupling 132.

The threaded spindle 124 passes through a nut 134, which is inserted into the center of a cross member 136 and, like the nut 28 according to FIG. 1, is preferably designed as a recirculating ball nut (FIG. 8).

The traverse 136 extends almost over the entire cross-sectional width of the cavity 118 and carries, at a distance from their ends, an open ball bushing 138, which is arranged in a longitudinally displaceable manner on a shaft 140 supported on the bottom 114 of the box-shaped frame part 112. In this way, the cross member 186 with the ball nut 134 arranged therein is held against rotation about the axis of the threaded spindle 124. Outside the ball guide bushes 138, the cross member 136 also carries a connection part 142 for an endless rope 144, which emerges from the cavity 118 through bores in the end wall 120 (not shown), whereupon it is deflected by a deflection roller 146 mounted on the frame part 112 in an inclined position runs over the lying surface 110 to a further deflection roller 148. The deflecting roller 148 leads the rope in front of the front column 106 of the vertical frame part 104 upward to a deflecting roller 150, from which it runs over the frame-shaped end part 108 to a fourth deflecting roller 152 which leads the rope 144 downwards again in front of the rear column part 106 , where it re-enters the cavity through an opening 154 and is returned to the connecting part 142 via a fifth deflecting roller 156.

The connecting part 142 is designed in a known manner in such a way that the cable 144 is fastened to a spring member (not shown) which, depending on the size of the tensile force acting on the cable, is deflected to a greater or lesser extent in relation to the cross member 136 in the cable direction. A transducer (also not shown) measures this deflection and sends a signal proportional to the size of the deflection to a monitoring device (not shown) which compares the deflections in the two connecting parts 142 attached to the ends of the crossmember 136 and in conjunction with them the current consumption of the motor 128 calculates the load distribution on the two cables 144.

On the lying surface 110 near the side edges on which the ropes 144 run, guide shafts or rails 158 are fastened, on each of which a holder 160 with a ball guide bush slides. The holders 160 have bores through which the cables 144 run and in which they are clamped in a suitable manner. In the example, a bridge 162 connects the two holders 160 and forms a handle for certain exercises that are carried out on the lying surface 110. Instead of the bridge 162, the holders can also be provided with separate handles, on which the exercise person engages with one hand or one foot at a time. The bridge 162 is preferably fastened in an articulated manner to the holders 160, so that in this case too different forces can be exerted on the two cables 144 and detected by the sensors in the connecting parts 142.

In the same way as on the lying surface 100, guide shafts or rails 164 (FIG. 6) are also fastened to the front sides of the columns 106, on which holders 166 (FIG. 5) are guided so as to be longitudinally displaceable. As also shown in FIG. 6, the holders 6 can in turn be connected to one another by bridges 168 to form handles, or alternatively can be equipped with individual handles. All these Hand¬ are exchanged as desired, thus forming Wechsel¬ rates that quickly to adapt to ^* each durchzufüh-. exercise can be exchanged.

The load for the exercise person is generated in the same way as in the device according to FIGS. 1 to 3, for which purpose a control device similar to control device 60 according to FIG. 1 is provided, the illustration of which in FIG. 5 has been omitted is.

Like the control device 60 according to FIG. 1, the control device for the training device according to FIGS. 5 to 8 can also be provided with an electronic computer which carries out any programming for the individual adaptation of the device to and by the exercise person allowed exercise to be performed. The reversal of the direction of rotation in the end positions can then also be determined from the computer, for which purpose the coupling 132 is provided with a flag 170 (or toothing), of which a sensor 172 is inductive in the same way as in the exemplary embodiment according to FIGS. 1 to 3 being affected.

Claims

PATENT REWARDS

1. Training device for developing and strengthening the muscles and joints of an exercise person through back and forth movement under load, characterized in that a reversible electric motor (20; 128) which can be braked beyond standstill is provided for generating the load, the clamping voltage of which can be steplessly increased by means of a control device (60) and the output torque of which can be converted via a gear (28, 30; 124, 134) into a linear force loading the person exercising.

2. Training device according to claim 1, d a d u r c h g e ¬ k e n n e e c h n e t that the motor (20; 128) is a DC motor with shunt characteristic.

3. Training device according to claim 2, d a d u r c h g e ¬ k e n n z e i c h n e t that the DC motor has a stator with permanent magnetic poles.

4. Training device according to claim 2 or 3, characterized in that the control device (60) contains a connectable to an alternating current transformer (62) with stepless regulation of the secondary voltage and a full-wave rectifier (34) connected to the secondary winding of the transformer, des ¬ sen output voltage is fed to the terminals of the DC motor (20; 128).

5. Training device according to one of the preceding claims, characterized in that ._as gear (28, 30; 124, 134) is a nut screw gear without self-locking.

6. Training device according to claim 5, d a d u r c h g e ¬ k e n n z e i c h n e t that the nut screw transmission is equipped with a ball nut (28; 134).

7. Training device according to claim 5 or 6, characterized in that the nut (28; 134) is arranged in the center of a crossmember (24; 136), the ends of which on longitudinal guides (22, 26; 138, 140) of a device frame (10; 100) are supported against rotation about the gear axis.

8. Training device according to claim 7, so that the longitudinal guides are formed by recirculating ball bushings (26; 138) that are displaceable on frame-fixed rods (22; 140).

9. ^' Training device _' according to claim 7 or 8 ,. dadu "rchgek characterized that the traverse (24) is provided with devices for attaching interchangeable handles (42) for the exercise person.

10. Training device according to claim 7 or 8, characterized in that the Mutternschraub¬ gear (124, 134) with the electric motor (128) within the device frame (100) is encapsulated and that at the ends of the traverse (136) via rollers in the exercise areas of the device are connected to deflected endless ropes (144) to which devices (160, 166) for attaching handles for the exercise person are attached.

11. Training device according to claim 10, dadurchge ¬ indicates that the device has an L-shaped frame (100), in the horizontal part (102) extending on the floor, the nut screw transmission (124, 134) with the Electric motor (128) below --Zo - a lying surface (110) is accommodated for the exercise person and its vertical part (104) is designed as an open portal, with sections of the endless ropes (144) both on both sides of the lying surface (110) and on both sides of the portal opening run over the length of the frame legs (102, 104).

12. Training device according to claim 10 or 11, so that the devices (160, 166) attached to the ropes (144) for attaching the handles to the device frame (100) are guided linearly.

13 .. Raining device according to claim 12, dadurchge ¬ indicates that the devices (160, 166) attached to the ropes (144) are provided with open ball guide bushings which are attached to guide rails (158, _^ 164 attached to the device frame) ) slides ..

14. Training device according to one of the preceding claims, that the control unit (60) contains a switching device for the direction of rotation of the electric motor (20; 128).

15. Training device according to claim 14, so that the training device is provided with signaling means (66, 68; 170, 172), of which the switching device can be controlled at the ends of the back and forth movement.

16. Training device according to claim 15, dadurchge ¬ indicates that the signaling means are formed by one of the motor or transmission shaft (via flags 66 or 172) inductively influenced transducer (68; 172) and that the control unit contains a pulse counter, which counts the pulses delivered by the transducer as a measure of the length of the back and forth movement. - ή -

17. Training device according to one of claims 15 or 16, so that the control unit (60) contains a current sensor which, when the current consumption of the electric motor (20; 128) drops under the idling current, controls the switching device for the direction of rotation of the electric motor.

18. Training device according to one of claims 14 to 17, that the control unit (60) is provided with a display and / or recording device for the motor current as a measure of the force exerted by the exercise person.

19. Training device according to claim 18 in conjunction with claim 10 or 11, dadurchgekenn¬ characterized in that the endless ropes (144) on the crossmember (136) are connected by elastic members (142), the elongation of which can be detected by measuring sensors and the display and / or recording device for determining the load distribution on the left and right cables can be guided.

20. Training device according to one of the preceding claims, characterized in that the control device for personal and / or exercise-related setting of the terminal voltage of the motor and possibly the length and / or position of the reciprocating movement and further parameters with the aid of an electronic computer is programmable.