JPH0733811Y2 - Strength training machine - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to a strength training machine.

[0002]

2. Description of the Related Art As a device for exercising muscles such as biceps femoris and semimembranosus, there has been provided a muscular exercise device called a so-called leg curl. This muscle training machine pivotally supports a pair of left and right roller pads that are applied to the ankles of both feet on the shaft in the vicinity of the end of the seat where the exerciser sits on his stomach.
By connecting the central part of the shaft to the arm, pivotably supporting the arm on the frame, and connecting it to the weight so that a desired weight load can be applied, and repeating the operation of raising and lowering the foot. It is a device for training muscle strength. Therefore, the practitioner who is hungry exercises in a state in which the arm and the shaft portion are sandwiched between the crotch.

[0003]

However, according to the above-mentioned conventional leg curl, the arm is connected to the weight by a wire having a constant length, and the position of the shaft, that is, the axial center of the roller pad is always constant. It cannot be changed due to its height. Therefore, there is a drawback that the height position (the initial position of the rotation angle) for starting the training operation cannot be changed according to the individual training person.

Further, during training, the arm and its shaft are located between the crotch of the trainee, so it is necessary to make the device as compact and compact as possible, without touching the body and inconspicuous. Since the weight is applied to the arm, the shaft has to be constructed with high rigidity and toughness. Therefore, there is a case where the claw comes into contact with the arm due to its large size.

Further, in order to eliminate the weight of the roller pad, a balance weight is provided so as to face the roller pad. However, the arrangement position of the balance weight must be on the upper surface of the seat, and that is, the roller pad. Since it rotates simultaneously with the movement of the seat, it is necessary to install it so that it does not hit the trained person who is hungry on the seat, which restricts the degree of freedom in design and has the drawback that the appearance does not look good. .

[0006] Therefore, the present invention was made for the purpose of providing a muscle strength training machine in which the above-mentioned drawbacks are eliminated.

[0007]

[Means for Solving the Problems] A muscle strength training machine according to the present invention has a frame near a seat, and is adjustable for expansion and contraction through a shaft portion.
A rotatable arm is rotatably supported and a roller is attached to the arm.
The pad is rotatably supported and the shaft is integrated with the arm.
While supporting the rotatable sprocket,
The sheave on which the load of
Rotatable sprocket and independently rotatable balun
Support the weight on the lower part of the seat,
Endlessly wrap the chain around the
-The sheave and balun at the desired height of the pad
Drive that can be changed and adjusted by attaching and detaching the weight
It is characterized by having a part .

[0008]

[Function] The rotation load of the weight is the chain and sprocket.
Is transmitted to the arm interlocking with the sheave, and therefore, the arm can be exercised by rotating the arm with the roller pad against the rotational load. Further, since the balance weight can be attached to and detached from the sheave at any rotation position, the initial position of the rotation angle of the arm can be changed and adjusted as desired .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the frame mounted on the floor surface.
The seat 2 is provided on the boom 1 at a predetermined height, and the weight portion 3 is connected to one end of the seat 2. A shaft portion 4 is erected on the frame 1 on the other end side of the seat 2, and an arm 5 is rotatably supported by a shaft 6 on the shaft portion 4.

As shown in FIG. 2, a sprocket 7 having a shaft 6 as a center is integrally connected to the arm 5, and a slide arm 8 is coaxially fitted so as to extend and contract in the axial direction. A lock pin 9 for adjusting the height is provided. The center of a shaft 10 is connected to the slide arm 8, and roller pads 11, 11 as rotating bodies are axially fitted to the left and right sides of the shaft 10 so as to be rotatable, and both ends are prevented from coming off.

A bracket 12 is fixed to the frame 1 at a lower portion near the shaft portion 4, a shaft 13 is supported by the bracket 12, and a sheave 14 as a rotating body is attached to the shaft 13.
The balance weight 15 and the arm 16 which are integrated with each other are rotatably supported, and a sprocket 17 that rotates coaxially with the sheave 14 is provided. The sprocket 17 has the same diameter as the sprocket 7, and a chain 18 is endlessly wound around both of them. 19
Is a stopper that determines the lower limit of rotation of the arm 5.

A lock pin 20 is provided at the center of the balance weight 15 so as to be orthogonal to the sheave 14, and a plurality of holes 21 into which the lock pin 20 is fitted are formed in the sheave 14 on the same circumference. . Further, the sheave 14 has a hole 21.
A wire end engaging portion 22 is formed on the circumferential edges of the diametrically opposed portions of the wire 2 and is engaged with and connected to the wire 2
3 is led to the weight part 3. The wire 23 is wound around a sheave 25 which is rotatably supported by a frame 27 of the weight portion 3 through a sheave 24 which is rotatably supported at the lower portion of the frame 1, and extends downward, and the lower end portion thereof is a weight suspension fulcrum portion. It is connected to 26.

The weight suspension support portion 26 is guided by a pair of guide rods 28, 28 so as to be able to move up and down. Similarly, the weight 2 which is also guided by the guide rods 28, 28 and can be moved up and down.
9 has a rod penetrating through a plurality of stacked central holes. The rod is provided with a lateral hole corresponding to the lateral hole formed in each of the weights 29 at each step, and the lateral weight corresponding to the hole is arbitrarily selected to select a desired weight.

The operation of the above embodiment will be described below.
As shown in FIG. 3, the practitioner 30 lays on the seat 2, grips the handle 31, puts the ankles of both feet on the roller pads 11, 11, and puts the roller pads 11, 11 on as shown in FIG. When raised, the chain 18 rotates via the sprocket 7, and the sheave 14 rotates via the sprocket 17, whereby the wire 23 is pulled,
The selected weight 29 rises along the guide rods 28, 28 and the load is applied. Therefore, the exerciser 30 can exercise the muscles of the thigh by repeating the raising and lowering motions of both feet.

Therefore, when it is desired to adjust the initial position of the roller pad 11 to change the amount of raising and lowering of both feet, the lock pin 20 is pulled out and inserted into the other hole 21 in advance before the training. As indicated by the phantom line in Fig. 1, the initial position of the rotation angle can be changed and adjusted. Also, when it is desired to change the distance from the shaft portion 4 to the roller pad 11, the lock pin 9 can be pulled out and expanded / contracted to match the length of the leg of each individual exerciser.

Thus, in this embodiment, the arm 1 which is adjustable in expansion and contraction is rotatably supported by the frame 1 near the seat 2 via the shaft portion 4, and the roller pad 11 is rotatably supported by the arm 5. Then, the sprocket 7 which is rotatable integrally with the arm 5 is rotatably supported on the shaft portion 4, and the weight 29
14 to which the load of the above is applied as a rotational load, a sprocket 17 that can rotate integrally with the sheave 14, and can rotate independently.
Pivoted to a balance weight 18 at the bottom of the sheet over preparative, wound a chain 18 endlessly on both sprockets 7 and 17 and the sheave 14 and the balance weight 15 at the desired height position of the roller pad 11 Rock pie
And a plurality of holes 21 into which the
It has a drive unit that can be further adjusted .

[0018]

According to the present invention described above, the rotational load of the weight is a low load that is axially supported by the arm that interlocks with the sheave.
Are transmitted to Rapaddo, therefore, a matter of course can have strength wrought by rotating the arm against the rotational load, because the detachable sheave balance weight at any rotational position, the arm The initial position of the rotation angle can be adjusted and adjusted, and the balance weight can be placed away from the arm , so it has a good appearance and can be arranged and configured without touching the body. Improve the degree. In addition, Ah
Shaft portion of the arm so can be provided by separate pieces independent of the shaft portion of the sheave, the shaft portion of the arm can downsizing.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional side view of a main part of FIG.

FIG. 3 is an operation explanatory view.

FIG. 4 is an operation explanatory view.

[Explanation of symbols]

1 ... Frame, 2 ... Sheet, 3 ... Weight part, 4 ... Shaft part, 5, 16 ... Arm, 7, 17 ... Sprocket, 10
… Shaft, 11… Roller pad (rotating body), 14
… Sheave (rotating body), 15… Balance weight, 18…
Chain, 20 ... Lock pin, 21 ... Hole, 23 ... Wire, 29 ... Weight

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Sugawara 2-7 Kandaji-cho, Chiyoda-ku, Tokyo Senoh Co., Ltd. (72) Inventor Takeshi Baba 2-7 Kandaji-cho, Chiyoda-ku, Tokyo Senor Co., Ltd. (72) Inventor Hideyoshi Yoshioka 2-7 Kandajimachi, Chiyoda-ku, Tokyo Senoh Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. An extension to a frame near a seat via a shaft.
A contraction-adjustable arm is rotatably supported, and the arm is rotatable.
The roller pad is rotatably supported and the arm is attached to the shaft.
While supporting the sprocket that can rotate integrally,
A sheave on which the load of eight is applied as a rotation load and
One sprocket that can rotate together, as well as one that can rotate independently
The balance weight is pivotally supported at the bottom of the seat,
Wind the chain around the rocket endlessly, and
With the sheave at the desired height of the roller pad
The balance weight can be attached and detached so that it can be changed and adjusted.
A muscular strength training machine characterized by having a drive unit .