JP6225374B1 - Bench press machine - Google Patents

Abstract

In a bench press machine, it is troublesome to frequently change the disk, and the weight of the disk is limited, so that it is difficult to deal with it in detail. Therefore, it aims at solving the problem which arises when using a disk. A two-piece barbell frame (2a) that supports a barbell (1) at both end portions is fixed to a fulcrum rotating portion (3) at an opposite end thereof, and the barbell frame (2a) is fixed. The weight frame (4a) is fitted to the slide rail (2b) provided in the frame. The weight frame (4a) mounts a main weight (4b) and a subweight (4c), and can arbitrarily set a user's load by moving within the range of the slide rail (2b). It was possible. [Selection] Figure 1

Description

  The present invention relates to a bench press machine which is one of training machines.

  There are many types of training machines, and it can be said that the structure varies depending on the muscle parts to be trained. In the case of the bench press which is one of them, the barbell is moved up and down in a supine state.

  A barbell usually has a disc (circular flat plate weight) attached to both ends of the bar, but in the case of a dumbbell, it is not a disc but is set with a weight determined from the beginning, and the weight cannot be changed. When changing weight, it was used for training by changing to a dumbbell with a different weight. In addition to this, there is also a form in which a disc is changed to the barbell, and the barbell for shortening the bar and holding it with one hand is used as a dumbbell. In any case, in the case of bench press, barbells that change discs are the mainstream.

  In recent years, a form of Patent Document 1 in which a disk is installed in another place without using a barbell and a short bar (hand grip) that can be grasped with a hand is connected to a wire is often seen. It is not necessary to fix when changing weights, it is easy to change the weight just by stacking, it can also correspond to the movement of the arms and legs separately, that is, the training effect is different by moving left and right alternately is there. Even in the direction of movement, it can be easily handled by changing the direction of the wire. In addition, it is highly useful in terms of safety without dropping weights.

JP 2012-236209 A JP2015-223479A JP 2011-139779 A

  A form using a barbell is the mainstream in the bench press, and therefore, the chest may be caught between the barbell and injured. Therefore, Patent Document 2 discloses a structure in which a bar is not a central portion but only a hand-held portion, and a weight is provided below the bench, and the chest is not injured by the bar. There are several methods for safety such as changing the shape of the bar and providing a stopper to prevent the bar from falling.

  One of the problems when using barbells is changing the weight. For example, a light weight for first acclimation, then a heavy weight to increase strength, and some people need to change to a lightest weight for trials at the limit, and finally to loosen the muscles for up. There is. Assuming that there are four weight changes in this way, one weight change must be made on at least one disc on both sides (left and right of the bar), and the bench press is on its back, so each time Return the barbell to its original position and start work.

  Patent Document 3 discloses a weight lifting training machine that uses a hydraulic or pneumatic cylinder, but even in this structure, a disk replacement operation is required. This form can be said to be a means for preventing accidents caused by the fall of a barbell, which is peculiar to weight lifting, which is likely to occur during a limit trial. It is an object of the present invention to provide an apparatus having a structure that does not require disk (weight) replacement in a bench press machine.

  The bench press machine according to the present invention utilizes the principle of the lever, and has a structure in which the load on the user is changed by moving the position of the disk (weight) back and forth with respect to the fulcrum.

  First of all, lying on the bench, the barbell bar is located above the chest. A frame connecting both ends of the bar extends toward the foot and is fixed to a fulcrum rotating portion provided on the upper portion of the support column. This structure allows the user to move the barbell up and down. As the disc (weight) moves on the frame between the barbell and the fulcrum rotating part, the load on the user changes, and the user can change the disc position without changing the disc. The desired setting value (load) can be obtained.

  The effect is only one, but the most important disk replacement is not necessary. In addition, since the load can be changed steplessly, there is no need to combine large and small disks as in the case of conventional disk replacement, and the weight determined as a disk (the weight of a single disk) It's not something you have to deal with.

  As described above, it is not necessary to stand up frequently every time the disk is changed, and it can be finished gently by gradually reducing the load even when the disk is up.

Plan view of bench press machine according to the present invention Side view of bench press machine according to the present invention Front view of bench press machine according to the present invention

A form is demonstrated with reference to FIGS.
Both the left and right ends of the barbell (1) are fixed to the barbell frame (2a), and the barbell frame (2a) is fixed to a fulcrum rotating portion (3) provided on the upper part of the column (10). Since the barbell (1) is fixed to the barbell frame (2a), it can be said that the barbell (1) is in a range where there is no problem although it rotates slightly during use (during elevation).

  A weight frame (4a) is fitted on the barbell frame (2a) and moves in the extension of the slide rail (2b). The weight frame (4a) is arched to prevent contact with the human body. A main weight (4b) and a sub weight (4c) are attached to the weight frame (4a). Although the subweight (4c) can set the total weight of the weight more finely, it is not necessary depending on the length of the slide rail (2b), and is described as one form.

  When the weight is moved, the load changes with respect to the user. However, in the degree of change, for example, when the user is changed, the required load is greatly different and the moving length of the weight is also increased. However, when one user changes the load, the weight that changes is small.

  Therefore, as a method of sliding the weight, the weight frame (4a) and the shaft (5b) are connected by a screw thread, and if the movement is small, the weight is moved by rotating the handle (5a), and the large movement is performed. In this case, a large change can be obtained immediately by releasing the connection by the thread and manually sliding the weight. The structure of the shaft (5b) and the method of connecting and releasing the threads are not limited, and some types are conceivable, and details thereof are omitted.

  Next, in raising and lowering the barbell (1), it is possible to move up and down on an arc centered on the fulcrum rotating portion (3). This vertical movement by the arc causes the barbell (1) to move in the horizontal direction to the user. This movement width decreases as the radius, that is, the length of the barbell frame (2a) increases. It is also important to install the barbell frame (2a) horizontally, and this does not give the user a sense of incongruity.

  Next, a stopper is provided as a measure for preventing accidents due to the chest being pinched by the barbell (1). If it says as one of this form, a fixed stopper (8) will be provided, and it can also respond by making the bench (9) into the raising / lowering type by an electric or an air damper. The barbell frame (2a) is shaped to be placed on the upper surface of the fixed stopper (8). In any case, this is not a matter that should be limited this time, and details are omitted.

  Further, the shaft (5b) requires maintenance with grease or oil, and is preferably finished with a casing or a housing as a whole in terms of the shape and protection of the support column (10), accident prevention, and the like. The bench (9) can be provided with an elevating function, and the height difference can be dealt with by moving the bench (9) or a long bench.

Next, a description will be given of the electric type provided as a form that is very convenient for the user although the cost is high.
The height of the barbell is adjusted by a hydraulic cylinder instead of a fixed stopper. The barbell frame (2a) can be stopped at an arbitrary position depending on the operating length of the hydraulic cylinder. Therefore, by stopping at a high position, the barbell frame (2a) or the like does not get in the way when sitting or standing up after completing training. Further, the movement of the weight can be easily dealt with by rotation of the motor or expansion / contraction of the cylinder. In other words, it is possible to operate the weight movement with one motor or cylinder and the lifting and lowering of the barbell frame (2a) with the other cylinder.

  Finally, in order to grasp the usage situation, it is necessary to know the load at the time of use on the display panel, and the load amount (kg) must be displayed. Therefore, it is a sensor that senses at the position of the barbell (1), for example, displays the weight amount calculated by the weight of the weight and the position of the weight installed on the weight frame (4a). It is also preferable to display the number of times of vertical movement.

DESCRIPTION OF SYMBOLS 1 Barbell 2a Barbell frame 2b Slide rail 3 Supporting point rotation part 4a Weight frame 4b Main weight 4c Subweight 5a Handle 5b Shaft 5c Shaft frame 5d Shaft fixing part 6 Housing 7 Base plate 8 Fixed stopper 9 Bench 10 Post

Claims (1)

On the fulcrum rotating part provided on the upper part of the two columns,
A barbell frame fixed substantially horizontally;
A rotary bench press machine with a barbell provided at the tip of the barbell frame,
To the slide rail provided on the barbell frame,
By fitting an arch-shaped weight frame with weights on it,
A bench press machine characterized in that a weight moves in the slide rail.

Images