JPH023616B2 - - Google Patents

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention provides a lock bar that moves up and down along a traction member such as a rope, and a lock bar that is smartly provided on the outer peripheral surface of the lock bar and parallel to the lock bar. It has an appropriate number of weights (weights) loosely fitted on the outer circumferential surface of the guide rod and loaded on the base, and a lock pin insertion hole provided in the weight at a desired position and a lock pin insertion hole provided in the lock bar corresponding to the lock pin insertion hole provided in the weight at a desired position. In a weight training device, a desired number of weights are inserted through the lock pin insertion holes, and the desired number of weights are moved up and down together with the lock bar by operating a traction member to strengthen muscles in various parts of the body. This invention relates to a device that is connected and fixed to a lock bar, that is, automatically selects a load weight.

``Prior Art'' Conventionally, the selection of the number of weights to be connected to such a lock bar (selection of load weight) is performed by selecting the lock pins of weights 1 located at the number corresponding to the desired load weight, as shown in FIG. Insertion hole 2 and corresponding lock pin insertion hole 4 of lock bar 3
The user or an attendant manually inserts the lock pin 5 while straddling both of the weights, connects several weights 1 to the lock bar 3 via the lock pin 5, and connects the weights to the lock bar 3. The desired operation of the weight 1 is raised and lowered together with the lock bar 3 by raising and lowering the towing rope 6.
In the figure, reference numeral 7 denotes a guide rod fixed to the machine frame 8 in parallel with the lock bar 3, and the weight 1 is loosely fitted onto the outer peripheral surface of the guide rod to guide the lifting and lowering of the weight 1. 9 is a pulley, and 10 is a base for loading and mounting the weight 1 on the lower surface of the machine frame 8. 11 is a lock bar insertion hole provided in each weight.

``Problems to be Solved by the Invention'' Conventionally, as mentioned above, the selection of the desired load weight (selection of the number of weights to be raised and lowered) was done by the user or an attendant manually inserting the lock pin into the specified position. Therefore, the operation of inserting the lock pin is cumbersome. Further, when the user inserts the lock pin by himself/herself, the training is interrupted each time, and the rhythm of the training is disrupted. If the user does not insert the locking pin, an attendant is required to do so. Since the insertion of the lock pin is done mechanically, there are problems such as the need to record the load weight selected each time in order to measure and analyze the amount of exercise. .

The present invention aims to solve various problems in selecting a desired load weight that the prior art has.

``Means for Solving the Problems'' The present invention provides a lock pin insertion hole provided in each weight and a lock pin in a predetermined position in each lock pin insertion hole of a corresponding lock bar. An electromagnetic moving means for the lock pin is provided, which is positioned in the lock pin insertion hole of the lock pin, and is moved to a position straddling both lock pin insertion holes when energized. An operating switch is connected in parallel to a power source so that a user can automatically connect a desired weight to a lock bar via a lock pin by operating the operating switch at a desired position while training. This is an attempt to solve the problems of the above-mentioned prior art. It is similar to the conventional device in that each weight is loosely fitted into a strategically provided guide bar and is moved up and down along the motion by operating a pulling member such as a rope together with a lock bar.

As embodiments of the electromagnetic moving means for each of the lock pins, the following means are used.

The first means is to insert each lock pin of a lock bar, which is provided by penetrating through the lock bar in correspondence with a pair of lock pin insertion holes arranged oppositely inside the weight, with the open end connected to the lock bar insertion hole of each weight. It uses an electromagnet that is fixedly placed in the center of the hole, and a pair of lock pins made of permanent magnets that are slidably housed in the lock pin insertion holes of each lock bar that are partitioned left and right by the electromagnet. The magnetic poles of the electromagnet and the lock pin are maintained at the same polarity when energized, and the length of the pair of lock pin insertion holes in each weight is predetermined shorter than the length of the lock pin.

The second means is to insert the lock pin into the inside of the weight from the left and right ends of the lock bar insertion hole of each weight corresponding to each pair of lock pin insertion holes provided inward from the left and right ends of the lock bar corresponding to each weight. A pair of electromagnets are fixedly arranged deep inside each pair of lock pin insertion holes arranged opposite to each other, and the electromagnets are respectively slidably housed in the pair of lock pin insertion holes of each fixedly arranged weight. It uses a pair of lock pins made of permanent magnets, and the magnetic poles of the electromagnet and the lock pin are held at the same polarity when energized, and the length of each pair of lock pin insertion holes in the lock bar is set to a predetermined length shorter than the length of the lock pin. It is being done this way.

The third means includes a pair of electromagnets fixed deep inside the insertion holes of a pair of lock pins whose open ends are connected to the lock bar insertion holes of each weight and are disposed facing each other inside the weights, and a pair of lock pins of each weight. An iron is slidably housed in each lock pin insertion hole of the lock bar, which is provided through the lock bar corresponding to the insertion hole, and one end thereof is connected to a tension spring that is fixedly disposed at the center of each lock pin insertion hole of the lock bar. It uses a pair of locking pins made of magnetic material such as a core.
The length of the pair of lock pin insertion holes in each weight is made shorter than the length of the lock pin.

The fourth means is a pair of electromagnets which are fixedly arranged deep inside each pair of lock pin insertion holes which are arranged inward from the right and left ends of the lock bar in correspondence with each weight, and a pair of electromagnets which are fixedly arranged deep inside each pair of lock pin insertion holes, which are arranged inward from the right and left ends of the lock bar. One end is connected to a tension spring which is fixed deep inside each pair of lock pin insertion holes which are arranged oppositely inside the weight from the left and right ends of the lock bar insertion hole of each weight corresponding to the hole. It uses a pair of lock pins made of a magnetic material such as an iron core that are slidably housed, and the length of each pair of lock pin insertion holes in the lock bar is made to be shorter than the length of the lock pin.

The fifth means includes lock pin insertion holes that are provided inside the weight and are arranged opposite to each other from both left and right ends of the lock bar insertion hole of each weight, corresponding to each lock pin insertion hole of the lock bar that is provided penetrating through the lock bar corresponding to each weight. It uses an electromagnet that is fixedly placed in the innermost part of one of a pair of lock pin insertion holes, and a lock pin made of a permanent magnet that is slidably housed in the lock pin insertion hole of the weight where the electromagnet is placed. The magnetic poles of the electromagnet and the lock pin are maintained at the same polarity when energized, and the length of the other lock pin insertion hole of each weight in which the electromagnet and the lock pin are not housed is made shorter than the length of the lock pin.

The sixth means includes lock pin insertion holes that are provided inside the weight and are oppositely disposed from both left and right ends of the lock bar insertion hole of each weight, corresponding to each lock pin insertion hole of the lock bar that is provided penetrating through the lock bar corresponding to each weight. One end is connected to an electromagnet fixedly arranged deep inside one of a pair of lock pin insertion holes, and a tension spring fixed deep inside the lock pin insertion hole of the other weight. It uses a lock pin made of a magnetic material such as an iron core that is slidably housed, and the length of the lock pin insertion hole on one side of each weight in which the electromagnet is placed is made a predetermined length shorter than the length of the lock pin. .

``Function'' The lock pin is placed in a predetermined position in the lock pin insertion hole provided in each weight and the lock pin insertion hole in the corresponding lock bar.When the power is not energized, the lock pin is positioned in the lock pin insertion hole of either the weight or the lock bar.When the power is energized, the lock pin is positioned in the lock pin insertion hole of either the weight or the lock bar. An electromagnetic movement means for the lock pin is provided, which consists of an electromagnet and a lock pin made of a permanent magnet, or an electromagnet and a lock pin made of a magnetic material such as an iron core with a tension spring. The magnetic poles of the lock pins made of steel are held at the same polarity when energized, and the length of each lock pin insertion hole in each weight and lock bar is set to a predetermined length (so that when the lock pin slides, the lock pin straddles both the lock pin insertion holes in the lock bar and weight). ), and each operating switch for electrically operating the electromagnetic moving means of each lock pin is provided at an appropriate position outside the machine and connected in parallel to the power supply, so that a predetermined amount corresponding to the desired load weight is provided. When the position operation switch is turned on, the electromagnet in the electromagnetic moving means at the predetermined position is energized, and its magnetic pole and the magnetic pole of the permanent magnet lock pin become the same polarity, so they repel, and the permanent magnet lock pin is inserted into the lock bar or weight. It slides in the hole and stops in a state spanning the lock pin insertion holes in both the lock bar and the weight, and a desired load weight, that is, a predetermined number of weights, is connected to the lock bar via the lock pin. When the specified operating switch is turned off, the electromagnet is deenergized and demagnetized, and due to the magnetic force of the lock pin made of a permanent magnet, the lock pin slides and attracts the electromagnet, and is inserted into the lock pin insertion hole of either the lock bar or the weight. The weight returns to its original position and the connection between the weight and the lock bar is released.

In addition, when the electromagnetic moving means for the lock pin is composed of an electromagnet and a lock pin made of a magnetic material such as an iron core with a tension spring, when a predetermined operation switch is turned on, the electromagnet at a predetermined position is energized and energized, and the lock pin made of a magnetic material such as an iron core with a tension spring is turned on. The lock pin slides inside the lock pin insertion hole against the elastic force of the tension spring and is attracted by the electromagnet, and the lock pin stops in a state spanning the lock pin insertion holes of both the weight and the lock bar, and is inserted into the lock pin in a predetermined number through the lock pin. weight is connected to the lock bar. When the specified operation switch is turned off, the electromagnet is deenergized and demagnetized, and the lock pin is pulled by the elastic force of the tension spring and slides through the lock pin insertion hole of either the lock bar or the weight. The weight returns to its original position inside and the connection between the weight and the lock bar is released.

"Example" An example of implementation of the load weight automatic selection device in the weight training equipment according to the present invention will be described with reference to the attached drawings.

FIG. 1 is a perspective view of a weight training device using a device according to the present invention, and the same symbols as those of the conventional device in FIG. 9 are the same members. 2 and 3 show the first means of the electromagnetic moving means for the lock pin. Inside each weight 1, a pair of lock pin insertion holes 12 are arranged facing each other, the opening ends of which are connected to the lock bar insertion holes 11, and inside the lock bar 3, the lock pin insertion holes 12 of each weight 1 are connected to the pair of lock pin insertion holes 12, respectively. Lock pin insertion holes 13 are provided at corresponding positions so as to pass through them. Each lock pin insertion hole 13 of the lock bar 3
An electromagnet 14 is fixedly arranged in the inner central part,
A pair of lock pins 15 made of permanent magnets are slidably housed in a lock pin insertion hole 13 that is partitioned left and right by the electromagnet 14. Each electromagnet 14 is connected to the machine frame 8 at the user's hand as shown in the first diagram.
Each of the control boxes is connected to a predetermined switch of an operation switch 17 provided in a control box 16 located at an appropriate position outside, via an energizing cable 18, respectively. The operation switches 17 are provided corresponding to the number of weights 1 loaded on the base 10, and a number corresponding to the number of weights 1 or a weight corresponding to that number is displayed, and each operation The switch is connected in parallel to the power supply, and the weight 1 is connected via the power cable 18.
The electromagnets 14 in the lock bar 3 are connected to the electromagnets 14 at positions corresponding to the number of electromagnets 14 in the lock bar 3, respectively. In FIG. 1, numeral 19 is a power switch, and numeral 20 is a display window in which the weight of the weight corresponding to the push of each operation switch is digitally displayed. The magnetic poles of each electromagnet 14 and the lock pin 15 made of a permanent magnet are held at the same polarity when energized, and the length (depth) of the pair of lock pin insertion holes 12 of each weight 1 is the same as that of the lock pin 1.
The length is set to a predetermined value shorter than the length of 5, for example, 1/2.

A method of using the apparatus according to the above embodiment will now be described. Assuming that the weight of one weight is 10 kg, if a load weight of 20 kg is selected, the user turns on the power switch 19 and the second switch of the operating switch 17 at hand. Then, the control box display window 2
The electromagnet 14 in the lock pin insertion hole 13 of the lock bar 3 corresponds to the weight 1 in the second position from the top among the appropriate number of weights 1 loaded on the base 10.
is energized to energize the electromagnet 14, and the electromagnet 14
and the lock pin 15 made of a permanent magnet have the same magnetic polarity, so they repel, and the lock pin 15 is pushed out and slides inside the lock pin 13, and the tip enters the lock pin insertion hole 12 of the weight. It hits the back wall and stops. The length of the lock pin insertion hole 12 is 1/1/1 of the length of the lock pin 15.
2, the lock pin 15 is located in a state where it straddles both the lock pin insertion hole 12 of the weight and the lock pin insertion hole 13 of the lock bar 3 by 1/2 length each, and the second weight 1 from the top and the lock pin insertion hole 13 of the lock bar 3 and is connected via lock pin 15.
When the user pulls up the tow rope 6, the top weight is loaded on top of the second weight, so the second weight from the top, i.e. 2, together with the lock bar 3 connected to the tow rope 6,
The weight of the item increases. Therefore, by raising and lowering the tow rope 6, a predetermined weight can be raised and lowered, and weight training can be performed. When the weight that has been raised and lowered is loaded onto the base 10 at its original position and the second operation switch is turned off to remove the power to the electromagnet 14, the electromagnet 14 is demagnetized and the lock pin 15 is moved by its own magnetic force. It slides inside the lock pin insertion hole 13 and is attracted to the fixedly arranged electromagnet 14, is accommodated in the lock pin insertion hole 13 of the lock bar and returns to its position, and the connection between the second weight and the lock bar 3 is released. . In the above case, since only the second operation switch is turned on, the electromagnets in the lock bar corresponding to the other weights are not energized, and each electromagnet is not energized, so the corresponding electromagnets are not energized. Each lock pin is attracted to each electromagnet by its own magnetic force and is housed entirely in the lock pin insertion hole of the lock bar. Therefore, each weight is not connected to the lock bar 3, but is connected to the lock bar 3. Except for the second weight placed on the lock bar and the first weight placed on it, the third and subsequent weights do not move up or down together with the lock bar.

Figures 4 to 8 show other electromagnetic moving means for the lock pin, and the other structures and operation methods are as described above, such as each electromagnet being connected to each operating switch via a current-carrying body such as a current-carrying cable. This is the same as in the case of means 1. FIG. 4 shows the electromagnetic moving means for the second lock pin. Inside the lock bar 3, a pair of lock pin insertion holes 21 are provided from both left and right ends inwardly corresponding to each weight 1. The lock bar insertion hole 1 corresponds to the lock pin insertion hole 21 of the lock bar of each weight 1.
Pairs of lock pin insertion holes 22 are disposed facing each other from both left and right ends of the lock pin 1 toward the inside. Inside the pair of lock pin insertion holes 22 of each weight,
A pair of electromagnets 14 are each fixedly arranged in the inner part, and a pair of lock pins 1 made of permanent magnets.
5 are respectively slidably accommodated. Electromagnet 14
The magnetic poles of the lock pin 15 and the lock pin 15 are maintained at the same polarity when energized, and the length of each pair of lock pin insertion holes 21 of the lock bar is set to 1/2 of the length of the lock pin 15.

Therefore, in this case, the movement of the lock pin 15 by operating the operating switch is opposite to that of the first means. In this case, the electromagnet 14 is connected to each weight 1.
Therefore, a current-carrying rail or a current-carrying rod installed in the machine frame 8 parallel to the lock bar 3 is used as a current-carrying body to connect each operation switch 17 and each electromagnet 14, and each electromagnet 14 is The provided electrode is made to be able to slide along the current-carrying rail or the current-carrying rod. Alternatively, instead of using a common current-carrying rail or a current-carrying rod for each weight, a current-carrying wire having a sufficient length may be individually connected to each weight.
The means for energizing the electromagnet is the same for other embodiments in which the electromagnet is disposed in the weight.

FIG. 5 shows a third electromagnetic moving means for the lock pin, and the weight 1 and the lock bar 3 have a pair of lock pin insertion holes 12 and a respective pair of lock pin insertion holes 12 in the same manner as the first means (FIGS. 2 and 3). Lock pin insertion hole 13
A pair of electromagnets 14 are fixedly arranged deep inside each pair of lock pin insertion holes 12 of the weight, while a pair of electromagnets 14 are fixedly arranged at the center of each lock pin insertion hole 13 in the lock bar. A pair of lock pins 15' made of a magnetic material such as an iron core and having one end connected to a tension spring 23 is slidably housed therein. The length of the lock pin insertion hole 12 of each weight is the lock pin 15'.
It is set to 1/2 of the length of .

Therefore, in this case, when the power is not energized, each lock pin 15' is entirely accommodated in each lock pin insertion hole 13 of the lock bar by the elastic force of the tension spring 23, and each weight 1 and lock bar 3 are
The connection with the switch 17 is canceled, and when the operation switch 17 at a predetermined position is turned on, the electromagnet 14 at a predetermined position connected to it is energized, and the electromagnet 14 is turned on.
is energized, and due to the electromagnetic force, the lock pin 15' made of a magnetic material at the corresponding position in the lock pin insertion hole 13 of the lock bar is attracted against the elastic force of the tension spring 23, and the lock pin 15' is attracted into the lock pin insertion hole 13. The tip of the weight enters the lock pin insertion hole 12 of the weight, and is attracted to the electromagnet 14 and stopped. The length of lock pin insertion hole 12 is 1/2 of lock pin 15', so lock pin 1
5' is positioned so as to straddle 1/2 of both the lock pin insertion hole 12 of the weight and the lock pin insertion hole 13 of the lock bar, thereby making a connection between the weight 1 and the lock bar 3, and thus connecting it to the lock bar 3. The weight 1 placed on top of the weight 1 is raised and lowered together with the lock bar 3 by the operation of the pulling rope 6. When a predetermined operation switch is turned off, the electromagnet 14 is demagnetized and the lock pin 1 is turned off.
5' is housed in the lock pin insertion hole 13 of the lock bar by the elastic force of the tension spring 23 and returns to its original position, and the connection between the weight 1 and the lock bar 3 is released.

FIG. 6 shows the electromagnetic moving means of the fourth lock pin, which is inside the lock bar 3 and each weight 1.
A pair of lock pin insertion holes 21 and a pair of lock pin insertion holes 22 are provided inside the lock bar, as in the second means (Fig. 4), and a pair of lock pin insertion holes 21 is provided in the deep inside of each pair of lock pin insertion holes 21 of the lock bar. A pair of electromagnets 14
are fixedly arranged in the pair of lock pin insertion holes 22 of each weight, while a pair of lock pins made of a magnetic material such as an iron core are connected at one end to a tension spring 23 which is fixedly arranged deep inside the lock pin insertion hole 22 of each weight. 1
5' is slidably housed. The length of each pair of lock pin insertion holes 21 of the lock bar is set to 1/2 of the length of the lock pin 15'.

Therefore, in this case, the movement of the lock pin 15' by operating the operating switch is opposite to that of the third means. In this case, each operation switch 17 and each electromagnet 14 are connected via a current-carrying cable 18 as in the case of FIGS. 1 to 3.

FIG. 7 shows a fifth lock pin electromagnetic moving means. Inside each weight 1, lock pin insertion holes 24 and 25 are arranged facing each other, the opening ends of which are connected to the lock bar insertion hole 11, respectively. Lock pin insertion holes 1 are provided in the lock bar 3 at positions corresponding to the lock pin insertion holes 24 and 25 of each of the weights 1.
3 are provided through each. Each weight 1
In one of the lock pin insertion holes 24, an electromagnet 14 is fixedly arranged in the inner part, and a lock pin 26 made of a permanent magnet is slidably housed. The magnetic poles of the electromagnet 14 and the lock pin 26 made of a permanent magnet are held at the same polarity when energized, and the lengths of the lock pin insertion hole 13 in the lock bar and the other lock pin insertion hole 25 in the weight 1 are equal to the length of the lock pin 26. It is set to 1/3. Therefore, in this case, when the electromagnet 14 is energized, since the magnetic poles are the same, the lock pin 26 repels the electromagnet 14 and slides in the lock pin insertion hole 24 in the opposite direction to the electromagnet 14, so that the tip end It passes through the lock pin insertion hole 13 of the lock bar, enters the other lock pin insertion hole 25 of the weight, and stops. At this time, the lock pin 26 is located in the lock pin insertion hole 24, 25 of the weight and the lock pin insertion hole 13 of the lock bar, in such a state that it extends by 1/3 of the length, and the weight 1 and the lock bar 3 are connected, and the electromagnet 14 When the power is removed from the electromagnet 1
4 is demagnetized, the lock pin 26 returns to its original position by its own magnetic force, is attracted to the electromagnet 14, and is accommodated in the lock pin insertion hole 24 on one side of the weight, thereby releasing the lifting and lowering of the weight and the lock bar.

FIG. 8 shows a sixth lock pin electromagnetic moving means, in which an electromagnet 14 is fixed deep inside one lock pin insertion hole 25 of the weight in FIG. A tension spring 23 is fixedly arranged in the deep part of the
A lock pin 26' made of a magnetic material such as an iron core and having one end connected to the lock pin 26' is slidably housed therein. In this case, when the electromagnet 14 is energized, its bias forces the lock pin 26' against the spring 2.
It is attracted by the electromagnet 14 against the elastic force of 3 and slides in the lock pin insertion hole 24 in the direction of the electromagnet 14, and the tip end of the lock pin insertion hole 13 has a lock bar.
Pass through the other lock pin insertion hole 2 of the weight.
5 and is attracted to the electromagnet 14 and stopped.
At this time, the lock pin 26' is located in the lock pin insertion holes 24, 25 of the weight and the lock pin insertion hole 13 of the lock bar, straddling each by 1/3 of the length, and the weight and the lock bar are connected in the seventh position. This is similar to the case shown in the figure, and when the electromagnet 14 is deenergized, the electromagnet 14 is demagnetized, and the lock pin 2
6' is returned to its original position by the elastic force of the tension spring 23 and is inserted into the lock pin insertion hole 24 on one side of the weight.
The weight and the lock bar are disconnected from each other.

It should be noted that the member for pulling the lock bar 3 is not limited to the rope shown in the above embodiment, but may be any suitable member such as a chain, and it is of course possible to make other design changes as appropriate without departing from the gist of the present invention. be.

"Effects of the Invention" Since the present invention is configured as described above, it has the following effects. First, the user can electrically connect the lock pin to the desired weight of the weight and the lock bar through electromagnetic movement of the lock pin by operating a predetermined operation switch located at hand. In this way, it is not necessary to manually connect each desired weight to the lock bar via the lock pin, and the desired load weight can be automatically selected easily and reliably, which is efficient.

Second, by automatically selecting a desired load weight, training can be performed while maintaining a constant rhythm without interrupting training due to the load weight selection operation. Further, there is no need for an attendant to select the load weight, unlike in the conventional case.

Thirdly, since the desired load weight is electrically selected through the operation of the operating switch,
The selected load weight can be displayed electrically, which is suitable for training. In addition, by connecting the operation switch to an information receiving, processing, and display device (computer) and serving as its input key,
It is possible to automatically record, measure, and analyze the amount of training exercise, and automatically manage exercise prescriptions using magnetic cards.As a result, it has a wide range of applications such as saving instructors as much as possible and collecting data necessary for rehabilitation. You can plan to use it.

[Brief explanation of drawings]

Figures 1 to 8 show an example of the implementation of the present invention, with Figure 1 being a front view of a weight training device using the device according to the present invention, and Figure 2 showing the first embodiment of the present invention. The longitudinal sectional view shown in Fig. 3 is A of Fig. 2.
-A sectional view, FIG. 4 is a longitudinal sectional view showing the second embodiment of the invention, FIG. 5 is a longitudinal sectional view showing the third embodiment of the invention, and FIG. 6 is a longitudinal sectional view showing the fourth embodiment of the invention. 7 is a longitudinal sectional view showing a fifth embodiment of the present invention, FIG. 8 is a longitudinal sectional view showing a sixth embodiment of the present invention, and FIG. 9 is a longitudinal sectional view showing a conventional embodiment. FIG. 2 is a front view of a weight training device using the device. 1... Weight, 3... Lock bar, 6... Traction rope, 7... Guide rod, 8... Machine frame, 10...
... Base, 11 ... Lock bar insertion hole, 12, 2
2, 24, 25... Weight lock pin insertion hole, 13, 21... Lock bar lock pin insertion hole, 14... Electromagnet, 15, 15', 26, 2
6'...Lock pin, 17...Operation switch, 1
8...Electric cable.

Claims (1)

[Scope of Claims] 1. A lock bar that moves up and down along a traction member such as a rope, and a guide rod that loosely fits on the outer peripheral surface of the lock bar and the outer peripheral surface of a guide rod that is strategically provided parallel to the lock bar. A suitable number of weights are loaded on the base, and the lock pin is inserted and pulled while spanning both the lock pin insertion hole provided in the weight at the desired position and the lock pin insertion hole provided in the lock bar correspondingly. In a weight training device that aims to strengthen the muscles of various parts of the body by raising and lowering a weight of a desired weight together with a lock bar by operating a member, a lock pin insertion hole provided in each weight and a corresponding predetermined position in each lock pin insertion hole of a lock bar are provided. An electromagnetic moving means for a lock pin, which has an electromagnet and a lock pin that approaches and separates from the electromagnet, and which positions the lock pin in the lock pin insertion hole of either the weight or the lock bar when the power is not energized, and moves it to a position spanning both of the lock pin insertion holes when the power is energized. An automatic load weight selection device for a weight training device, characterized in that each operation switch for electrically operating the electromagnetic moving means of each lock pin is provided at an appropriate position outside the device and connected in parallel to a power source. 2 As an electromagnetic movement means for the lock pin, each of the lock bars is provided penetrating through the lock bar in correspondence with a pair of lock pin insertion holes which are arranged oppositely inside the weight and whose open end is connected to the lock bar insertion hole of each weight. The lock pins are energized by using an electromagnet fixedly placed in the center of the lock pin insertion hole, and a pair of permanent magnets that are slidably housed in the lock pin insertion holes of each lock bar partitioned left and right by the electromagnet. The weight according to claim 1, wherein the magnetic poles of the electromagnet and the lock pin are held at the same polarity, and the length of the pair of lock pin insertion holes in each weight is made a predetermined length shorter than the length of the lock pin. Automatic load weight selection device for training equipment. 3. As an electromagnetic moving means for the lock pin, a weight is inserted from the left and right ends of the lock bar insertion hole of each weight corresponding to each pair of lock pin insertion holes provided inward from the left and right ends of the lock bar corresponding to each weight. A pair of electromagnets are fixedly arranged deep inside each pair of lock pin insertion holes arranged opposite each other, and each of the electromagnets is slidably housed in a pair of lock pin insertion holes of each weight in which the electromagnets are fixedly arranged. The magnetic poles of the electromagnet and the lock pin are held at the same polarity when energized, and the length of the insertion hole of each pair of lock pins in the lock bar is made a predetermined length shorter than the length of the lock pin. Claim 1 characterized in that
An automatic load weight selection device for the weight training equipment described in 2. 4. As an electromagnetic moving means for the lock pin, a pair of electromagnets are fixedly arranged deep inside the lock pin insertion holes of a pair of lock pins whose open ends are connected to the lock bar insertion holes of each weight and are arranged opposite each other inside the weights, and a pair of electromagnets of each weight. The lock bar is slidably housed in each lock pin insertion hole of the lock bar, which is provided through the lock pin insertion hole corresponding to the lock pin insertion hole of the lock bar, with one end connected to a tension spring fixedly disposed in the center of each lock pin insertion hole. Weight training according to claim 1, characterized in that a pair of lock pins made of a magnetic material is used, and the length of the pair of lock pin insertion holes of each weight is made shorter than the length of the lock pin by a predetermined value. Automatic load weight selection device for equipment. 5. As an electromagnetic movement means for the lock pin, a pair of electromagnets are fixedly arranged deep inside each pair of lock pin insertion holes, which correspond to each weight and are arranged inward from the left and right ends of the lock bar, and each of the lock bar One end is connected to a tension spring that is fixed deep inside each pair of lock pin insertion holes, which are arranged opposite to each other inside the weight from the left and right ends of the lock bar insertion hole of each weight, corresponding to the lock pin insertion holes. A pair of lock pins made of a magnetic material and slidably housed in the lock bar are used, and the length of each pair of lock pin insertion holes of the lock bar is made shorter than the length of the lock pin by a predetermined value. An automatic load weight selection device in the weight training equipment according to scope 1. 6. As an electromagnetic moving means for the lock pin, a lock pin is provided inside the weight from both left and right ends of the lock bar insertion hole of each weight, corresponding to each lock pin insertion hole of the lock bar which is provided penetrating through the lock bar corresponding to each weight. An electromagnet fixedly arranged at the inner depth of one of each pair of lock pin insertion holes;
A lock pin made of a permanent magnet is slidably housed in a lock pin insertion hole of a weight in which the electromagnet is placed, and the magnetic poles of the electromagnet and the lock pin are held at the same polarity when energized, so that the electromagnet and the lock pin are not housed. 2. The automatic load weight selection device for a weight training device according to claim 1, wherein the length of the other lock pin insertion hole of each weight is made shorter than the length of the lock pin by a predetermined length. 7. As an electromagnetic moving means for the lock pin, a lock pin is provided inside the weight from both left and right ends of the lock bar insertion hole of each weight, corresponding to each lock pin insertion hole of the lock bar, which is provided penetrating through the lock bar corresponding to each weight. An electromagnet fixedly arranged at the inner depth of one of each pair of lock pin insertion holes;
An electromagnet is placed in the lock pin insertion hole of the other weight using a lock pin made of a magnetic material that is slidably housed with one end connected to a tension spring that is fixed deep inside the lock pin insertion hole. 2. The automatic load weight selection device for a weight training device according to claim 1, wherein the length of one of the lock pin insertion holes of each weight is made shorter than the length of the lock pin by a predetermined length.