JPS61226072A - Automatic load weight selector in weight training device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

"Industrial Field of Application" The present invention provides a lock bar that moves up and down along the machine frame 1C via a traction member such as a rope, and a VC machine frame provided on the outer peripheral surface of the lock bar and parallel to the lock bar. The guide rod Q) has an appropriate number of weights (wheel weights) mounted on the base and loose on its outward facing surface, and has a lock pin insertion hole provided in the weight at a desired position It and a corresponding lock bar insertion hole. In the weight training equipment, the weight of the desired type 1 is raised and lowered together with the lock bar by inserting the lock pin while straddling both the lock pin extension holes σ) and operating the traction member to strengthen muscles in various parts of the body. This invention relates to a device that connects and fixes a weight of W number to a lock bar via a lock pin, that is, automatically selects a load weight. ``Prior Art'' Conventionally, the selection of the number σ of weights connected to such a lock bar (selection of load weight) is performed by selecting the number of weights σ corresponding to the desired load weight, as shown in Fig. 9. ) The lock pin insertion hole 2 and the corresponding lock pin insertion hole 4σ of the lock bar 3) The user or an attendant manually inserts the lock pin 5 while straddling both the lock pin insertion hole 2 and the corresponding lock pin insertion hole 4σ of the lock bar 3. A weight 1 of a desired weight is connected to a lock bar 3, and by raising and lowering a pulling rope 6 connected to the lock bar 3, the weight 1 of a desired weight is raised and lowered together with the lock bar 3. In the figure, 7 is a guide rod fixed to the machine frame 8 in parallel with the lock bar 3, and the weight 1 is loosely fitted to the outer peripheral surface of the guide rod, and the weight 1σ
) is also σ) to guide the user when going up and down. 9 pulleys, 2 thick pulleys for lifting the weight 1 on the bottom surface of the 0σ machine frame 8. 11 is a lock bar insertion hole provided with each weight 1C. "Problems to be Solved by the Invention" Conventionally, as mentioned above, users have not been able to select the desired σ load weight (select the number of weights to be lowered and lowered).

The operation of inserting the lock pin is cumbersome, especially since the attendant must manually insert the lock pin into the designated position. Q) When the user inserts the lock pin by himself/herself, the training rhythm becomes disrupted. (If the user does not insert the lock pin, the attendant who does so will become the enemy.) Is there a single V for inserting the lock pin? The problem with pigeons is that in order to measure, analyze, etc., the load weight selected each time must be recorded and kept. It is an object of the present invention to solve the problem of selecting a desired load weight V (variable σ), which the prior art has. [Means for Solving the Problems] The present invention σ is such that a lock pin is inserted into a lock pin insertion hole provided in each weight and at a desired position in each lock pin insertion hole of a lock bar corresponding to the lock pin insertion hole. An electromagnetic moving means for the lock pin is provided at an appropriate position outside the machine frame to move the lock pin to a position 11 that straddles both lock pin insertion holes when power is applied. An operating switch for electrically operating the electromagnetic moving means is provided so that the user can automatically connect a desired weight to the lock bar via a lock pin by operating the operating switch at a desired position while training. By doing this, the various problems t7 of the above-mentioned prior art are solved. It is similar to the conventional device in that it is loosely fitted into a guide bar provided on each weight carrier machine frame, and is moved up and down along the machine frame together with a lock bar by operating a pulling member such as a rope. Accordingly, the following means are used as embodiments of the electromagnetic moving means σ) for each of the lock pins. The first means is that the open end is connected to the lock bar insertion hole 1 of each weight. Lock bar σ] A magnet fixedly placed in the center 8 of each lock pin insertion hole, and a permanent magnet slidably housed in each lock pin insertion hole of each lock bar partitioned left and right by the electromagnet. This device uses a pair of lock pins rc and the magnetic poles of the electromagnet and the lock pin are rc
They are held in the same polarity, and the length of the lock pin insertion hole of each weight is a predetermined length shorter than the length of the lock pin σ). The second means includes a lock bar insertion hole of each weight corresponding to each lock pin insertion hole provided toward the inner side from both left and right ends of the lock bar corresponding to each weight. σ) A pair of σ11 stones fixedly placed in each pair of locking pins arranged oppositely inside the weight from the left and right ends, and a pair of σ11 stones fixedly placed in the center of the divine hole, respectively, and a pair of each weight with the electromagnets fixedly placed. A pair of lock pins made of permanent magnets each slidably housed in a lock pin insertion hole is used. (Each pair of lock pin insertion holes σ of the lock bar) The opening end is connected to the lock bar insertion hole of each weight by a predetermined IC shorter than the length of the lock pin. A pair of lock pin insertion holes provided in the weight inner phase 1 are provided inside the holes H [y K fixed arrangement 6-pointed pair σ
) Electromagnet and each weight σ] Inside the lock bar corresponding to a pair of lock pin insertion holes T/(Top ○ in each lock pin insertion hole of the lock bar provided through) A tension spring fixedly arranged in the center One! Printing with shame @J
The length of the pair of lock pin insertion holes in each weight is σ, and the length of the lock pin is a predetermined rectangle. A pair of electromagnets are fixedly arranged deep inside each pair of lock pin insertion holes corresponding to each weight and arranged inward from both left and right ends of the lock bar, and each of the lock bar Each weight corresponds to the lock pin insertion hole.
Inside the tl weight 41) [Each pair σ arranged in the 7'I direction] Fixedly arranged in the lock pin insertion hole at the back 1bK respectively〃
This uses a -71 lock pin made of a magnetic material that is slidably housed with one end attached to a tension spring that is attached to the lock bar. It has a predetermined short length than the long length. The means of spear 5, each way) to Zt response 1. Insert the lock bar of each weight corresponding to each lock pin insertion hole of the lock bar that is provided through the lock bar.
Hole σ) Inside the weight from both left and right ends [1v (K; each pair σ arranged in the I direction) lock pin insertion] The inner force of the m hole!
This device uses an electromagnet that is fixedly arranged and a lock pin that is a permanent magnet that houses a slidable Nu IC in the lock pin insertion hole of the weight where the electromagnet is placed. Sometimes the same + ILVC
The length of the other lock pin insertion hole of each weight is extended to a predetermined length shorter than the length of the lock pin. The means of E6 is that the lock bar insertion hole σ) of each weight corresponds to each lock pin insertion hole of the lock bar provided penetrating through the lock bar corresponding to each weight.
Each pair σ is arranged oppositely inside the weight from the medium 1fl)
The lock pin insertion hole σ) - force σ) is fixedly placed in the inner depth fII, and the other weight σ) is fixedly placed in the lock pin insertion hole. A magnetic body slidably housed with its side ends connected
The length of the lock pin insertion hole on one side of each weight in which the electromagnet is placed is set to a predetermined length (swept). When the lock pin is not energized, the lock pin is placed in a predetermined position in each lock pin insertion hole of the lock bar and the corresponding lock pin insertion hole of the lock bar. ) An electromagnetic moving means for the lock pin is provided, consisting of an electromagnet and a permanent magnet lock pin that moves the lock pin to a position spanning the lock pin insertion hole, or an electromagnet and a magnetic lock pin with a tension spring. The magnetic poles of the lock pins are maintained at the same polarity when energized, and the size of each lock pin insertion hole in each weight and lock bar is set as specified (when the lock pin slides, the lock pin is in the lock part 9) (7) 0 lock pin insertion hole Q ) Both bolts are equipped with an operating switch located at an appropriate position outside the machine frame to electrically operate the electromagnetic moving means for each lock pin, so that the position corresponding to the desired load weight i1i K is provided. When the operation switch for localization j# is turned on, the electromagnet in the electromagnetic moving means at the predetermined position is energized. σ) The 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 Or slide it inside the lock pin insertion hole in the weight 7
The lock bar is stopped in a state where it straddles the lock pin insertion holes in both the lock bar and the weight, and a desired σ) load weight, that is, a predetermined number of weights, is connected to the lock bar via the lock pin. When the specified operation switch is turned off, the electromagnet σ) is de-energized and turned off, and the permanent magnet lock pin θ)
Due to the magnetic force, the lock pin slides and is attracted to the electromagnet, and either the lock bar or the lock weight returns to its original position in the lock pin insertion hole, and the connection between the weight and the lock bar is released. In addition, when the electromagnetic movement means of the lock pin is composed of an electromagnet and a lock pin made of a magnetic material with a tension spring, when the operation switch is turned on by a person, the electromagnet is energized and the electromagnet is energized. The lock pin slides in the lock pin insertion hole against the elastic force of the tension spring, is attracted by the electromagnet, and stops while straddling the lock pin insertion holes of both the lock pin weight and the lock bar, and is held in place via the lock pin. number θ) weights are connected to lock per VC. 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 inside the lock pin insertion hole to release the lock bar or the weight. either − force σ
) The weight returns to its original position inside the lock pin insertion hole, and the connection between the weight and lock bar is released. "Example" Implementation of the load weight selection device in the weight training equipment developed by the present invention? I will explain the opening of the attached sheet. ,? 2. 9IP+, a weight training device using the device according to the present invention, is the same as the conventional device shown in Figure 9 in the parent diagram.
It is the same material as the ``Kiho 0)'' model. , 72 and section 3 show the first means of the lock pin electromagnetic means. Inside K of each weight 1, there is a pair σ whose open end is connected to the lock bar'-insertion hole 11-r.
) Lock pin insertion holes 12 are arranged facing each other, and the lock pin insertion holes 1 are provided in positions corresponding to the pair of lock pin insertion holes 12.
3 are provided through each dog. Electromagnets 14 are arranged in the same position in the middle part of each lock pin insertion hole 13 of the lock bar 3, and a pair of lock pins 15 made of permanent magnets are placed in the lock pin insertion holes 13 divided left and right by the electromagnets 14. is slidably housed. Each electromagnet 1
4, 111 As shown in the diagram, the control box 16 is located at an appropriate position of the machine frame 8, such as in the user's hand +t K arrangement f-J.
The operation switches 17σ) provided in the control panel are connected to predetermined switches via energizing cables 18, respectively. The operation switch 171 is provided corresponding to the number of weights l mounted on the base 10, and the weight 1σ
) The number corresponding to the number of pieces or the weight corresponding to the number of pieces is displayed, and each operation switch has a power supply and one
It is connected to each electromagnet 14 in the lockper 3 at a position corresponding to the number of weights 1 via a current-carrying cable 18. In Figure 111, 19t-j power switch, 2 (H
j This is a display window that digitally displays the weight of the corresponding 9-eight by pressing each operation switch. 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 each weight 1σ
) The length of the pair of lock pin insertion holes 12 is Rz) The length of the lock pin 15 is set to a predetermined short length (for example, 4σ). ]-?

[--How to use the packaging piece according to the above embodiment will now be explained. Way) Assuming that the weight f of one piece is 1101c, 20kgσ) Selection of the load cloth 1. If [1
-j, the user turns on the power switch 19 and turns on the second switch of the operation switch 17 at hand -f". Then, the display window 20 of the control box shows 20 kg.
The load weight is displayed, and the way in the second position from the top)
Lock pin insertion hole 1 in lock bar 3 compatible with IK
When the electromagnet 14 in the lock pin 14 is energized, the electromagnet 14 is energized and the magnetic poles are the same between the electromagnet 14 and the lock pin 15, which is a permanent magnet, so there is a repulsion 17, and the lock pin 15 is pushed out and inside the lock pin 13. The first part is inserted into the lock pin insertion hole 12 of the weight, and the lock pin insertion hole 1 is inserted into the lock pin insertion hole 1 of the weight.
It comes into contact with the back wall of No. 2 and stops. Lock pin insertion hole 12σ
) is a drop of length σ of the lock pin 15, the lock pin 15U is located in both the lock pin insertion hole 12 of the weight and the lock pin insertion hole 13 of the lock bar 3, respectively, straddling the length σ) gK, and The second weight 1 is connected to the lock bar 3 through the barb lock pin 15. When the user pulls up the tow rope 6, the top σ)
The weight is loaded on top of the second weight (σ)
Then, the second weight from the top, that is, the two weights, rise together with the lock par 3 which is disconnected from the tow rope 6Vc. Therefore, by raising and lowering the pulling rope 6, the weight of a predetermined heavy phase can be raised and lowered by h'+, and weight training can be performed. When the second operating switch is turned off and the electromagnet 14 is de-energized, the electromagnet 14 disappears and the lock pin 15kt slides inside the lock pin insertion hole 13 due to its own magnetic force.
4V (adsorption E7, lock bar σ) lock pin insertion hole 13
It is accommodated inside and returns to the original position tl, and the connection between the second 0) weight and the lock par 3 is released. In this case, turn on only the second θ) operation switch.
L. Since each of the other weights in the lock bar corresponding to the weights VC is not energized, each electromagnet is not energized. The lock pin σ) is attracted by the electromagnet and is entirely accommodated in the lock pin insertion hole, so each of its weights is in contact with the lock pin 3, and the second σ) is connected to the lock pin 3.
Except for the weight and the first weight placed on it, the third and subsequent weights do not move up and down together with the lock par. Figures 114 to 1 and 8 show other electromagnetic moving means for lock pins (-), and other structures such as each electromagnet being connected to each operation switch via a tortoise cable. The operation method is the same as in the case of means σ) in 1'1 above. E. 4) The electromagnetic moving means of the lock pin is shown (σ), and each weight 1 is attached to #L in the lock bar 3.
Corresponding to the left and right ends, each -z
1σ) A lock pin insertion hole 21 is provided to lock each weight IKi lock bar. Corresponding to the pin insertion holes 21, a pair of lock pin insertion holes 22 are disposed facing each other inwardly from the left and right ends of the lock bar insertion holes 11θ). A pair of electromagnets 14 are fixedly disposed in the pair of lock pin insertion holes 22 of each weight, and a pair of lock pins 15 made of permanent magnets are respectively slidably housed. The magnetic poles of the electromagnet 14 and the lock pin 15 are held at the same polarity when energized.
VC settings@are. Therefore, in this case, the movement of the lock pin 15 by operating the operation switch is opposite to that of the means 1θ). Figure 5 shows the electromagnetic moving means of the lock pins 1 and 3, and the 1st σ) is inside the weight 1 and the lock pin 3.
Similar to the means (Figures 2 and 3), a pair of lock pin insertion holes 12 and each lock pin insertion hole 13 are provided, and one pair of σ is provided in the innermost part of each pair of lock pin insertion holes 12 of the weight.
) The electromagnet 14 is fixedly arranged inside the lock bar σ) Inside each lock pin insertion hole 13 is a magnetic core such as an iron core whose one end is connected to a tension spring 23 which is fixedly arranged in the center thereof. A pair of locking pins 15' are slidably housed. The length of the lock pin insertion hole 12 of each weight minus the length of the Jld lock pin 15' is set. Therefore, in this case, when Vctl'i is not energized, each lock pin 15' is entirely housed in each lock pin insertion hole 13 of the lockper by the elastic force of the tension spring 23, and the connection between each weight 1 and lockper 3 is established. is released, and when the operation switch 17 at a predetermined position is turned on, the 1JL magnet 1 at a predetermined position connected to it is released.
4 is energized, the electromagnet 14 is energized, and the electromagnetic force causes the lock pin 15' made of a magnetic material at the corresponding position in the lock pin insertion hole 13 of the lock bar σ to resist the elastic force of the tension spring 23. It slides inside the lock pin insertion hole 13 and its tip enters the lock pin insertion hole 12 of the weight, and 1! It is attracted by the magnet 14 and stops. Lock pin insertion hole 12σ) length - JHLock pin insertion hole 12 of lock eight and lock bar lock pin insertion hole 13 are straddled by the position #[-tsσ
) The connection between the weight 1 and the lock bar 3 is broken, and therefore the weight 1 connected to the lock bar 3 and the weight 1 placed on top of it are raised and lowered together with the lock bar 3 by the operation of the tow rope 6σ) . When the operation switch (predetermined θ) is turned off, the electromagnet 14 is demagnetized and the lock pin 15'
is accommodated in the lock pin insertion hole 13 of the lock bar by the elastic force of the tension spring 23 (σ) and returns to its original position, and the connection between the weight 1 and the lock bar 3 (σ) is released. Figure J' 6 shows the electromagnetic moving means for the lock pin 3'4, and there are lock pin insertion holes 21 in each pair in the locker 3 and in each weight 1, similar to the means for σ rod 2 (Figure 4). Each pair of lock pin insertion holes 22 is provided, and each pair of lock pin insertion holes 21 of the lock bar is
A pair of electromagnets 14 are fixedly arranged in the lock pin insertion holes 22 of each weight.
-1Itll to the tension spring 23 fixedly placed in the back
A pair of lock pins 15' made of a magnetic material such as iron 8 and having their ends connected are slidably accommodated. The length of each pair of lock pin insertion holes 21 of the lock bar is set to six of the length of the lock pin 15'. Therefore, in this case, the movement of the lock pin 15'σ due to the action of the hinge operation switch is the opposite of the method in ).3. Figures 3 and 7 show the lock pin 0) Toyama moving means of the σ spear 5, in which the lock pin insertion holes 24 and 2 are connected to the lock bar insertion holes 11 in each weight 1, and the opening caps are connected to the lock bar insertion holes 11, respectively.
5 are arranged facing each other, and lock pin insertion holes I3 are provided in the lock par 3 at positions corresponding to the lock pin insertion holes 24 and 25 of each of the weights 1, respectively. An electromagnet 14 is fixedly arranged in the inner part of the lock pin insertion hole 24 in each weight 1, and
A lock pin 26 made of permanent a% stone is slidably housed. Lock pin 2 consisting of electromagnet 14 and permanent magnet
6σ) The magnetic poles are held at the same polarity when energized, and the lock pin insertion hole 13 in the lock bar and the external force in the unit 1 σ) The length of the lock pin insertion hole 25. Therefore, in this case, the electromagnet 14 When 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, and the tip passes through the lock pin insertion hole 13 of the lock bar. The weight enters the lock pin insertion hole 25 of the weight and stops. When the lock pin 26 and the lock pin insertion hole 24, 25 of the weight and the lock pin insertion hole of the lock bar are connected, the weight 1 and the lock bar 3 are connected, and the passage to the electromagnet 14 is established.
When the lock is released, the electromagnet 14 is demagnetized and the lock pin 261
The self σ) output returns to the original position, attracts the electromagnet 14, and is accommodated in the lock pin insertion hole 24 of the weight, thereby releasing the contact between the weight and the lock bar. Figure 78 shows the electromagnetic moving means for the locking pin of spear 6. In Figure 7, a 'TjL magnet 14 is fixedly arranged deep inside FL25, where the locking pin is inserted with one force of the weight. A lock pin 26' made of a magnetic material such as iron 8 is slidably housed in a lock pin insertion hole 24 for external force, and one end thereof is connected to a tension spring 23 fixedly arranged in the deep part of the lock pin insertion hole 24. It is. In this case, electromagnet 1
When power is applied to 4, the lock pin 26' is attracted to the electromagnet 14 against the elastic force of the spring 23 due to its bias.
Slide in the lock pin insertion hole 24 in the direction of the electromagnet 14,
The tip passes through the lock pin insertion hole 13 of the lock bar, enters the lock pin insertion hole 25 of the weight, is attracted to the electromagnet 14, and is stopped. At this time, lock pin 26'
is the same as the connection between the lock pin insertion holes 24 and 25 of the weight and the lock pin insertion hole 13 of the lock bar, and the electromagnet 1
4) When the energization is removed, the electromagnet 14 is demagnetized, and the elastic force of the tension spring 23 on the lock pin 26' causes the original position
The lock pin returns to σ) and is accommodated in the lock pin insertion hole 24 of the weight, and the connection between the weight and the lock bar is released. Note that the member for pulling the lockper 3 is not limited to the rope shown in the above embodiment, but may be any suitable member such as a chain (and, in other cases, the invention σ), as long as the design can be changed as appropriate within the scope of the invention. Of course. "Invention σ] Effects" The present invention has the following σ) effects configured as shown below. 1IIC, the user can electrically connect the desired weight σ) weight and lock bar σ) by the lock pin through electromagnetic movement of the lock pin by operating a predetermined operation switch located at hand. Therefore, there is no need to manually connect the desired weight to the lock bar each time via the lock pin' and the lock bar, and the desired load weight can be automatically selected easily and reliably. Be efficient. 22, by automatically selecting a desired load weight, it is possible to perform training while maintaining a constant 011J rhythm, even though training is not interrupted through the load weight selection operation. . Further, there is no need for an attendant to perform the load weight σ) selection operation, unlike in the prior art. Since the desired σ) load weight σ) is electrically selected through the operation of the spear 3Vc and the operating switch σ), the selected load weight can be electrically displayed, which is suitable for training. Also, connect the operation switch to the information σ) reception, processing, and display device a (computer).
From Ikaki and Nasuko VC. Training luck! kII-ji c)) Automatic recording, measurement, analysis, and exercise prescription using magnetic cards σ) Automatic management, resulting in a collection of data that is essential for instructor labor savings and rehabilitation. *It can be used in a wide range of applications.

[Brief Description of the Drawings] Figures 1 to 118 show examples of implementing the present invention.
Figure 1.1 is a front view of a weight training device using the device t'r according to the present invention. -A sectional view,
Figure 114 is a longitudinal cross-sectional view showing an embodiment of the present invention σl, '4'2y+, Figure 5 is a longitudinal cross-sectional view showing an embodiment of the spear 3 of the present invention,
Figures 1 and 6 show a longitudinal cross-section of an embodiment of the fang 4 of the present invention, and a fang 7.
The figure is a longitudinal sectional view showing the spear 5&+ embodiment of the present invention, Figures 1 and 8 are longitudinal sectional views showing the 276 embodiment of the present invention, and the fang 9 [at
FIG. 2 is a front view of a weight training device using a conventional spear.

Claims (7)

[Claims] (1) A lock bar that moves up and down along the machine frame via a traction member such as a rope, and a guide rod that loosely fits on the outer circumferential surface of the lock bar and the outer circumferential surface of a guide rod provided on the machine frame parallel to the lock bar and is placed on the base. With an appropriate number of loaded weights, insert the lock pin in a state spanning both the lock pin insertion hole provided in the weight at the desired position and the corresponding lock pin insertion hole provided in the lock bar, and operate the traction member. In a weight training device that aims to strengthen muscles in various parts of the body by raising and lowering weights of a desired weight together with a lock bar, the lock pins are de-energized at predetermined positions in the lock pin insertion holes provided in each weight and in the corresponding lock pin insertion holes of the lock bar. Sometimes, an electromagnetic moving means for the lock pin is provided, which is positioned in the lock pin insertion hole of either the weight or the lock bar, and moved to a position spanning both lock pin insertion holes when energized. An automatic load weight selection device for weight training equipment, characterized in that it is provided with an operation switch that electrically operates the load weight. (2) As an electromagnetic movement means for the lock pin, a lock bar is provided that penetrates into the lock bar in correspondence with a pair of lock pin insertion holes that are arranged opposite each other inside the weight, and whose open end is connected to the lock bar insertion hole of each weight. An electromagnet is fixedly placed in the center of each lock pin insertion hole of the lock bar, and a pair of permanent magnets are slidably housed in the lock pin insertion holes of each lock bar divided into left and right sections by the electromagnet. , the magnetic poles of the electromagnet and the lock pin are held at the same polarity when energized, and the length of the pair of lock pin insertion holes in each weight is made shorter than the length of the lock pin by a predetermined length. Load weight automatic selection device for weight training equipment. (3) As an electromagnetic moving means for the lock pin, the left and right ends of the lock bar insertion hole of each weight correspond 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 which are arranged oppositely inside the weight, and the electromagnets slide into the pair of lock pin insertion holes of each weight in which the electromagnets are fixedly arranged. A pair of lock pins made of permanent magnets are housed in the lock bar, and the magnetic poles of the electromagnet and the lock pin are held at the same polarity when energized. An automatic load selection device for weight training equipment according to claim 1, characterized in that: (4) As an electromagnetic movement means for the lock pin, a pair of electromagnets are fixedly arranged deep inside a pair of lock pin insertion holes whose open ends are connected to the lock bar insertion hole of each weight and are arranged opposite each other inside the weight, and each weight. One end is connected to a tension spring fixed at the center of each lock pin insertion hole of the lock bar, which is provided through the lock bar in correspondence with a pair of lock pin insertion holes, so that the lock bar can slide. Claim 1, characterized in that a pair of lock pins made of a magnetic material are used, and the length of the pair of lock pin insertion holes in each weight is made predetermined shorter than the length of the lock pin. Automatic load weight selection device for weight training equipment. (5) As an electromagnetic moving means for the lock pin, a pair of electromagnets are fixedly arranged deep inside each pair of lock pin insertion holes corresponding to each weight and arranged inward from both left and right ends of the lock bar, and a lock bar. One end is attached 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 each of the lock pin insertion holes. A patent characterized in that a pair of lock pins made of a magnetic material are connected and slidably housed, and the length of each pair of lock pin insertion holes in a lock bar is made shorter than the length of the lock pin by a predetermined value. A load weight 1 automatic selection device in a weight training device according to claim 1. (6) As an electromagnetic moving means for the lock pin, the lock pin is inserted into 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 disposed at the inner depth of one of each pair of lock pin insertion holes, and a lock pin made of a permanent magnet slidably housed in the lock pin insertion hole of the weight in which the electromagnet is disposed. The magnetic poles of the electromagnet and the lock pin are held 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 accommodated is made a predetermined length shorter than the length of the lock pin. An automatic load weight selection device for weight training equipment according to claim 1. (7) As an electromagnetic moving means for the lock pin, the lock pin is inserted into 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 that is provided penetrating through the lock bar corresponding to each weight. An electromagnet is fixed at the inner depth of one of the lock pin insertion holes of each pair of weights, and a tension spring is fixed at the inner depth of the lock pin insertion hole of the other weight. A lock pin made of a magnetic material is connected and slidably housed, and the length of the lock pin insertion hole on one side of each weight in which the electromagnet is arranged is made a predetermined length shorter than the length of the lock pin. An automatic load weight selection device for weight training equipment according to claim 1.