JPH0216773Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an upper arm training device that mainly uses the upper arm to move weights and train the upper arm muscles and abdominal muscles.

Conventionally, there are various training devices that use weights to train muscles and the body, but all of them have a structure that simply uses the weight of the weights, and the gravitational force of the weights is always at a constant strength. Since it affects the muscles, it is difficult to perform truly rational training. This is because the force acting on a joint in the human body differs depending on the joint angle. This is because the changes in the acting force when the joint angle changes are related to the length, muscle strength, and mechanical efficiency of the muscles. For example, the flexor and extensor muscles of the shoulder joint reach their maximum isometric strength when the joint angle is between 90° and 100°, so the gravitational force of the weight also acts at its maximum when the muscle strength is at its highest. When muscle strength is weakened, truly rational training without strain or waste is possible only by applying a small amount of force to avoid overloading.

Therefore, the purpose of this invention is to have the gravitational force of the weight change in direct proportion to changes in muscle strength and joint force, allowing for truly rational training without strain or waste. An object of the present invention is to provide an upper arm training device having a configuration in which:

The ultimate purpose of this invention is to provide a seat consisting of a seat plate and a back plate fixed to the front part of a frame, a lumbar plate fixed between the seat plate and the back plate, and a shoulder plate of the seat. a pair of eccentric rope wheels arranged symmetrically on the frame near the area and pivotally supported for eccentric rotation, and a pair coaxially with the eccentric rope wheels and rotatably supported independently on the frame symmetrically. and a pair of left and right ropes, one end of which is connected to the eccentric rope wheel, and the other end of which is connected to a weight guided and suspended from the rear of the frame in a symmetrical arrangement. The purpose of the present invention is to provide a training device for the body.

In the structure of this invention, the term "rope" has a broad meaning that includes chains, cables, cords, etc. in addition to the original rope with high tensile strength, and therefore, the term "rope vehicle" refers to chain vehicles, cable guide vehicles, pulleys, etc. It has a broad meaning that includes.

Next, this invention will be explained with reference to illustrated embodiments. 1 to 3 show a leg training device according to this invention. In the figure, 1... is a weight, which is a substantially rectangular and relatively thin plate-like body as shown in Figure 4, and has a hole 1a in the center for passing the hanging rod 2, and guides in the center of both sides. It has U-shaped notches 1b, 1b through which the rods 3, 3 are passed. A large number of weights 1... are installed in a stacked manner in the height direction of the guide rods 3, 3, and are suspended by passing the retaining pins 4 inserted from above at the desired number of positions into the recesses 2a of the hanging rods 2. ing. The hanging rod 2 is suspended from a hanging frame 5 that can be raised and lowered along guide rods 3, 3. A rope 7 is connected to a bolt 6 of the hanging frame 5. The guide rods 3 of the weights 1 include a bottom frame 8, a vertical frame 9 fixed to both sides of the bottom frame 8 and standing upright, and a sub-frame 9 arranged parallel to and adjacent to the outside of the vertical frame 9 and fixed thereto. ′ and is fixed vertically between the
10a and 10b are connecting beams that rigidly connect the left and right vertical frames.

A pair of left and right ropes 7, 7 connected at one end to the hanging frame 5 pass through a guide rope wheel 11 attached with a top plate 11a to the top of the vertical frame 9 and sub-frame 9', respectively, and then to the vertical frame 9. It is connected to an eccentric rope pulley 12 installed at the front between the frame 9 and the sub-frame 9' with a fixing pin or the like. The shaft 12a of the eccentric rope pulley 12 is rotatably supported by a bearing 13 fixed to the vertical frame 9 and the sub-frame 9'. The pull arms 14, 14 are symmetrically installed at the inner ends of the eccentric rope pulleys 12, 12, which are symmetrically installed.

In the figure, reference numeral 15 denotes a seat installed at an intermediate position between the left and right pull arms 14, 14, and at a height position where the user's sitting height relative to the pull arm 14 is appropriate.
The seat 15 is configured to include a back plate 15a and lumbar plates 15b, 15b having a length extending over the entire length of the user's sitting height. The seat 15 includes a supporting frame 1 having an inverted L-shape on the side and standing between a connecting beam 10c which is rigidly connected to the front between the left and right vertical frames 9, and a bottom protruding frame 8'.
The back plate 15a is installed using a support frame 17 rigidly connected between the connecting beams 10b and 10c. In the figure, reference numeral 18 denotes a footrest fixed to the support frame 16.

As shown in FIG. 1, the user sits on the seat 15, leans against the back plate 15a, and bends the elbow joints of both arms. Place your elbows on the left and right pull arms 14, 14, and strengthen your upper body, especially your abdominal muscles.
Rotate the two pull arms 14, 14 toward you at the same time by making full use of your arm strength and shoulder joints (as indicated by the arrow). In such a case, the eccentric rope wheel 12 is rotated by the same rotation angle as the pull arm 14, and the weight 1 is lifted up via the rope 7 connected to the eccentric rope wheel 12. By the way, the effective radius of the eccentric rope pulley 12 changes as a function of the rotation angle of the eccentric rope pulley 12 as a variable, with a minimum at a rotation angle of 0° or 360° and a maximum at a rotation angle of 180°. 1... acts on the pull arms 14, 14 in a manner that varies in magnitude inversely to the effective radius of the eccentric rope sheave 12. Note that the rotation operation of the pull arms 14, 14 does not have to be done simultaneously on the left and right sides, but may be rotated alternately on the left and right sides.
The user can freely use the left and right sides.

Therefore, the gravitational action of the weights 1 on the pull arm 14 is made consistent with changes in the user's abdominal muscle strength, arm strength, and muscle strength at the shoulder joint. In other words, by optimizing the attachment angle of the pull arm 14 with respect to the maximum and minimum effective radius of the eccentric rope wheel 12 and the connection position of the rope 7 to the eccentric rope wheel 12, the gravitational action of the weight 1 can be reduced when the muscular strength is at its maximum. It can be made to act at its maximum, or to act at a moderately reduced level when muscle strength is weakened.

According to the present invention described above, the seat includes a seat plate and a back plate fixed to the front part of the frame, and a lumbar plate fixed between the seat plate and the back plate. a pair of eccentric rope wheels capable of stably holding the body of a trainee on the seat, arranged symmetrically on the frame near the shoulder portions of the seat and pivotally supported for eccentric rotation; and a pair of eccentric rope wheels coaxial with the eccentric rope wheels. and a pair of pull arms that are symmetrically supported on the frame so that they can each rotate independently, the center of rotation of the upper arm is at the shoulder of the trainee, and the left and right movements can be made separately. Since single-joint exercises can be performed safely and appropriately, even an amateur can train muscles extremely easily. One end of each rope is connected to the eccentric rope wheel, and the other end is guided and suspended from the rear of the frame in a symmetrical arrangement. It has a pair of left and right ropes that are connected to the weights, so it can be applied lightly to the upper arm muscles at the beginning of the exercise.
This is an upper arm training device that can apply a heavy variable load in the latter half of the day, allowing you to train your muscles appropriately and effectively.

Therefore, the upper arm training device of this invention not only can always apply an equal load to the left and right upper arms by simultaneously rotating the left and right pull arms to apply the muscles that bend and extend, but also can By rotating them individually or alternately, you can always apply a constant load to the left and right upper arms individually, creating a truly rational upper body that is free from unreasonable and wasteful movements.
This allows you to train your upper arms.

[Brief explanation of the drawing]

Figures 1, 2, and 3 are front views of an upper arm training device that is an embodiment of this invention, respectively;
They are a plan view and a left side view, and FIG. 4 is a perspective view showing the structure of a weight portion. 1... Weight, 7... Rope, 12... Eccentric rope car, 14... Pull arm, 15... Seat.

Claims (1)

[Scope of utility model registration request] A seat consisting of a seat plate and a backrest plate fixed to the front part of a frame, a lumbar plate fixed between the seat plate and the backrest plate, and arranged symmetrically to the frame near the shoulders of the seat. a pair of eccentric rope wheels that are rotatably supported eccentrically; a pair of pull arms that are coaxial with the eccentric rope wheels and symmetrically supported on the frame so as to be able to rotate independently; a pair of left and right ropes, one end of which is connected to the frame, and the other end of which is connected to a weight guided and suspended from the rear of the frame in a symmetrical arrangement;
An upper arm training device comprising: