Trunk rotation restriction supporter

Abstract

This trunk rotation restriction supporter comprises a first mounting part and a second mounting part. The first mounting part is mounted around the waist of a user. The second mounting part is mounted around a shoulder of the user on one of the left and right sides, and is connected to the first mounting part. In a state where the first mounting part is mounted on the user, the second mounting part is connected to the first mounting part only at a portion of the first mounting part that is located on the waist of the user on the other of the left and right sides. In a state where the first mounting part and the second mounting part are mounted on the user, the second mounting part extends from the portion of the first mounting part toward the shoulder.

Description

Trunk rotation restriction supporter

[0001] The present invention relates to a trunk rotation restriction supporter.

[0002] Supporters for reducing the risk of lower back pain are known (see, for example, Patent Document 1). For example, in warehouses, factories, nursing homes, and the like, there is a risk of lower back pain occurring when carrying heavy loads.

[0003] JP 2017-64335 A JP 2017-213379 A

[0004] When a worker lifts a load up to waist height and moves it to either the left or right side of the worker, the worker tends to rotate his or her trunk. In other words, when a worker carrying a load moves the load, for example, from right to left, there is a risk that the worker will twist his or her waist. Rotating the trunk while carrying a heavy load places a heavy load on the lower back and increases the risk of various musculoskeletal disorders.

[0005] Trunk rotation can cause intervertebral disc degeneration and lead to skeletal disorders such as disc herniation. Furthermore, sports such as baseball, volleyball, and soccer, which involve relatively frequent trunk rotation, can cause stress fractures in the lumbar interarticular process area, potentially leading to spondylolysis and spondylolisthesis. Furthermore, trunk rotation can cause muscle disorders such as myofascial lower back pain due to excessive stress on the lumbar muscles.

[0006] Patent Document 1 discloses a work support suit in which elastic bodies are arranged vertically on the back of the waist of the main body of the work clothing, with the aim of supporting the return movement of raising the upper body with the elastic bodies. Patent Document 2 discloses a lifting support device with a load transmission means for transmitting load weight, a posture adaptation means, and a connecting means, with the aim of preventing back injuries during lifting operations. The technologies disclosed in Patent Documents 1 and 2 do not easily restrict trunk rotation.

[0007] Therefore, the present invention has been devised in consideration of the above-mentioned problems, and its object is to provide a trunk rotation limiting supporter that limits the rotation of the user's trunk.

[0008] A trunk rotation restriction supporter according to one aspect of the present invention comprises a first attachment part and a second attachment part. The first attachment part is attached around the waist of a user. The second attachment part is attached around one of the user's left or right shoulders and is connected to the first attachment part. When the first attachment part is attached to the user, the second attachment part is connected to the first attachment part only at a portion of the first attachment part that is located on the other of the user's left or right waist. When the first attachment part and the second attachment part are attached to the user, the second attachment part extends from the portion of the first attachment part toward the shoulder.

[0009] The trunk rotation restricting supporter of the first invention is characterized by comprising a waist band that can be wrapped around the user's waist, and a rotation inhibiting band that, when worn by the user, has one end attached to any location on the waist band between the rear of the right pelvis and the front of the right pelvis via the right hip, and the other end attached to any location on the waist band between the right hip and the front of the right pelvis, wrapped around the left armpit, above the left collarbone, and around the left shoulder.

[0010] The trunk rotation restricting supporter of the second invention is characterized by comprising a waist band that can be wrapped around the user's waist, and a rotation inhibiting band that, when worn by the user, has one end attached to any location on the waist band between the rear of the left pelvis and the front of the left pelvis via the left hip, and the other end attached to any location on the waist band between the left hip and the front of the left pelvis, wrapped around the right armpit, above the right collarbone, and around the right shoulder.

[0011] The trunk rotation restricting supporter of the third invention is characterized by comprising: a waist band that can be wrapped around the waist of a user; a left shoulder rotation restricting band that, when worn by the user, has one end attached to a location on the waist band between the rear of the right pelvis and the front of the right pelvis via the right hip, and the other end attached to a location on the waist band between the right hip and the front of the right pelvis, wrapped around the left armpit, above the left collarbone, and the left shoulder; and a right shoulder rotation restricting band that has one end attached to a location on the waist band between the rear of the left pelvis and the front of the left pelvis via the left hip, and wrapped around the right shoulder, below the right armpit, above the right collarbone, and the other end attached to a location on the waist band between the left hip and the front of the left pelvis.

[0012] The trunk rotation restriction supporter of the fourth invention is characterized in that, in any of the first to third inventions, the waist band is provided with a button, and one end and the other end of the rotation suppression band are provided with a hook that can be freely rotatably engaged with the button.

[0013] A trunk rotation restricting supporter according to a fifth aspect of the present invention is the fourth aspect, characterized in that the buttons are provided at intervals on the waist band toward the waist area.

[0014] One aspect of the present invention provides a trunk rotation restriction supporter that restricts the rotation of a user's trunk.

[0015] FIG. 1 is a diagram showing an example of a trunk rotation limiting supporter. FIG. 2(a) is a diagram showing an example of a rotational connection portion, and FIG. 2(b) is a diagram showing an example in which a plurality of rotational connection portions are arranged. FIG. 3(a) is a diagram showing a user wearing a trunk rotation limiting supporter for the left shoulder from the right hip, as viewed from the front, and FIG. 3(b) is a diagram showing the user from the back. FIG. 4(a) is a diagram showing a user wearing a trunk rotation limiting supporter for the right shoulder from the left hip, as viewed from the front, and FIG. 4(b) is a diagram showing the user from the back. FIG. 5(a) is a diagram showing a user wearing a trunk rotation limiting supporter for the left shoulder, as viewed from above, and FIG. 5(b) is a diagram showing a user wearing a trunk rotation limiting supporter for the right shoulder, as viewed from above. These figures show an example of an operation of lifting a heavy object using a trunk rotation limiting supporter to which the present invention is applied. FIG. 7(a) is a diagram showing the maximum rotation angle, and FIG. 7(b) is a diagram showing the trunk ratio. FIG. 8(a) is a diagram showing the rotation angle when the load is lifted at 30° using a trunk rotation limiting supporter to which the present invention is applied, FIG. 8(b) is a diagram showing the rotation angle when the load is lifted at 60°, FIG. 8(c) is a diagram showing the rotation angle when the load is lifted at 90°, and FIG. 8(d) is a diagram showing the trunk ratio. FIG. 9 is a diagram showing the front side of another example of a trunk rotation limiting supporter. FIG. 10 is a diagram showing the back side of another example of a trunk rotation limiting supporter. FIG. 11 is a diagram showing the back side of an example of a trunk rotation limiting supporter worn by a user. FIG. 12 shows a portion of the trunk rotation limiting supporter as viewed vertically. FIG. 13 shows a state in which the first attachment part is worn. FIG. 14 shows a state in which the first attachment part is partially worn. Fig. 15 shows a part of a modified trunk rotation restricting supporter. Fig. 16 shows the back side of yet another example of a trunk rotation restricting supporter worn by a user. Fig. 17 shows the back side of yet another example of a trunk rotation restricting supporter worn by a user.

[0016] [Description of Embodiments of the Present Disclosure] First, embodiments of the present disclosure will be listed and described.

[0017] [1] A trunk rotation restriction supporter in an embodiment of the present disclosure includes a first attachment part and a second attachment part. The first attachment part is attached around the user's waist. The second attachment part is attached around one of the user's left or right shoulders and is connected to the first attachment part. When the first attachment part is attached to the user, the second attachment part is connected to the first attachment part only at a portion of the first attachment part that is located on the other of the user's left or right waist. When the first attachment part and the second attachment part are attached to the user, the second attachment part extends from the portion of the first attachment part toward the shoulder.

[0018] In the trunk rotation restricting supporter described in [1] above, the first attachment part is attached around the user's waist, and the second attachment part is attached around one of the user's left or right shoulders and is connected to the first attachment part only at a portion of the first attachment part located at the other of the user's left or right waist. In this case, when the user's trunk rotates, tension is generated in the second attachment part between the user's left or right shoulder and the other of the user's left or right waist. Because the second attachment part is connected only at a portion located at the other of the user's left or right waist, the tension generated by the rotation of the user's trunk is difficult to disperse, and the component of this tension in the direction of rotation of the trunk is relatively large. Therefore, the rotation of the user's trunk is restricted with a relatively strong force.

[0019] [2] In the trunk rotation restriction supporter of [1] above, the second attachment part may extend in a fan shape from the above-mentioned part of the first attachment part when the first attachment part and the second attachment part are worn by the user. In this case, the tension generated in the second attachment part is applied in a balanced manner around the shoulders of the user while ensuring a component in the direction of trunk rotation in the tension generated in the second attachment part.

[0020] [3] In the trunk rotation restriction supporter of [1] or [2] above, the second attachment part includes a back extension part, a shoulder extension part, a chest extension part, and a connecting part. The back extension part may extend from the above-mentioned portion of the first attachment part. The shoulder extension part and the chest extension part may each extend from the back extension part. The connecting part may connect the shoulder extension part and the chest extension part. When the first attachment part and the second attachment part are attached to a user, the back extension part extends in a fan shape from the above-mentioned portion of the first attachment part toward the shoulders along the user's back, the shoulder extension part extends from the back extension part along the user's shoulders, the chest extension part extends from the back extension part along the user's lateral chest, and the connecting part connects the shoulder extension part and the chest extension part on the front side of the user. In this case, despite the relatively simple structure, the tension generated in the second attachment part ensures a rotational component of the trunk, and the tension generated in the second attachment part is applied in a balanced manner around the user's shoulders.

[0021] [4] In the trunk rotation restriction supporter of [3] above, the back extension portion may include a first strap portion and a second strap portion, each of which has a strap-like shape. The first strap portion may be connected to the above-mentioned portion of the first attachment portion at one end and to the shoulder extension portion at the other end. The second strap portion may be connected to the above-mentioned portion of the first attachment portion at one end and to the chest extension portion at the other end. In this case, despite the relatively simple structure, the tension of the second attachment portion is less likely to be dispersed, and the component of the tension generated in the second attachment portion in the direction of trunk rotation is more reliably ensured.

[0022] [5] In the trunk rotation restriction supporter of [4] above, the first and second bands may be formed from a single band. The second attachment part may include a sliding mechanism that allows the bands to slide at the above-mentioned location. In this case, the lengths of the first and second bands can be appropriately adjusted to suit the user's physique.

[0023] [6] In the trunk rotation restriction supporter of either [4] or [5] above, the back extension portion, shoulder extension portion, chest extension portion, and connecting portion may be formed from a single belt. In this case, while the structure is relatively simple, the tension of the second attachment portion is less likely to be dispersed, and the rotational component of the trunk is more reliably secured.

[0024] [7] In the trunk rotation restriction supporter according to any one of [1] to [6] above, when the first attachment part is attached to a user, the portion of the first attachment part may be located in a range of 0 to 120 degrees to the other of the left and right sides from a position below the user's navel when viewed vertically. In this case, the rotational component of the trunk is more reliably secured.

[0025] [8] The trunk rotation restriction supporter according to any one of [1] to [7] above may further include a fabric separate from the second attachment part. The fabric may be configured so that when the second attachment part is attached to the user, the fabric is positioned between the second attachment part and the user. In this case, the second attachment part is prevented from getting caught on the user's body or on clothing separately worn by the user.

[0026] [9] The trunk rotation restriction supporter according to any one of [1] to [8] above may further include a fabric separate from the second attachment part. The second attachment part may be configured so that, when the second attachment part is worn by a user, the second attachment part is positioned between the fabric and the user. In this case, the second attachment part is prevented from getting caught on an obstacle or on clothing worn by the user.

[0027] [Details of the Embodiments of the Present Disclosure] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements are designated by the same reference numerals, and redundant description will be omitted. In this specification, "trunk rotation" refers to the rotation of the thorax relative to the pelvis about a vertical axis. The trunk rotation angle is the angle of rotation of the thorax relative to the pelvis about a vertical axis. In other words, the trunk rotation angle is the angle obtained by subtracting the angle obtained by rotating the pelvis about a vertical axis from a position facing forward without changing the foot positions from the angle obtained by rotating the thorax about a vertical axis from a position facing forward without changing the foot positions.

[0028] (First embodiment) Figure 1 is a diagram showing a first embodiment of a trunk rotation restricting supporter of the present invention. As shown in Figure 1, a trunk rotation restricting supporter 1 to which the present invention is applied comprises a waist band 2 and a rotation inhibiting band 3. The trunk rotation restricting supporter 1 to which the present invention is applied is intended to restrict the rotation of the trunk of a user such as a worker. The waist band 2 corresponds to a first attachment part, and the rotation inhibiting band 3 corresponds to a second attachment part.

[0029] The trunk rotation restricting supporter 1 to which the present invention is applied may be configured as a work jacket by adding a clothing portion such as mesh fabric 41, for example.

[0030] The waist band 2 is a band worn around the user's waist. The waist band 2 has a hook-and-loop fastener male surface 25 and a hook-and-loop fastener female surface 26. The waist band 2 is worn around the user's waist, with the hook-and-loop fastener male surface 25 and the hook-and-loop fastener female surface 26 mating. The waist band 2 is preferably fastened around the pelvis, which makes it easier to secure the waist band 2 and improves the rotation suppression effect. The waist band 2 is preferably provided with a non-slip material on the surface that comes into contact with the user to prevent rotation around the waist. The waist band 2 is made of, for example, a cloth material. The waist band 2 has a connection portion 21 that is joined to the rotation suppression band 3.

[0031] The rotation inhibiting belt 3 is, for example, a synthetic resin tape having a width of 10 mm to 60 mm. The rotation inhibiting belt 3 may also be, for example, a synthetic resin tape having a width of 10 mm to 80 mm. The rotation inhibiting belt 3 is made of a material such as nylon or acrylic, and is a tape made by processing the fibers of the material into a woven or knitted fabric. The tape width may be constant, or may be thicker or thinner in some areas to take into account how force is applied. It is desirable that the rotation inhibiting belt 3 is non-elastic. One end of the rotation inhibiting belt 3 is attached to the connecting portion 21 of the waist band 2, and the other end is attached to the connecting portion 21 of the waist band 2 while the rotation inhibiting belt 3 is wrapped around the user's shoulder. The rotation inhibiting belt 3 is provided in two types: one for the left shoulder, where one end is attached to the waist band 2 at a location from behind the right pelvis to the front of the right pelvis via the right hip, and the other end is wrapped around the left shoulder from the left armpit to above the left collarbone and attached to a location on the waist band 2 from the right hip to the front of the right pelvis, and the other end is attached to the waist band 2 at a location from behind the left pelvis to the front of the left pelvis via the left hip, where it is wrapped around the right shoulder from the right armpit to above the right collarbone and attached to a location on the waist band 2 from the left hip to the front of the left pelvis. The trunk rotation restricting supporter 1 may have both a right shoulder support and a left shoulder support, but is not limited to this and may have only one of them.

[0032] The rotation inhibiting belt 3 may be attached to the mesh fabric 41 so that the rotation inhibiting belt 3 naturally wraps around the user's right shoulder when the mesh fabric 41 is worn. However, the mesh fabric 41 is not essential and may be omitted. In such a case, the trunk rotation restricting supporter 1 is composed only of the waist band 2 and the rotation inhibiting belt 3. The rotation inhibiting belt 3 may be inserted into a running path sewn on the back of the mesh fabric to prevent misalignment of the running path between the mesh fabric and the rotation inhibiting belt 3. A shoulder buckle 35 is provided on one end of the rotation inhibiting belt 3, and an underarm buckle 33 is provided on the other end of the rotation inhibiting belt 3. The shoulder buckle 35 is detachable from the underarm buckle 33. That is, the shoulder buckle 35a is detachable from the underarm buckle 33a, and the shoulder buckle 35b is detachable from the underarm buckle 33b. In this case, an auxiliary buckle 37 may be provided on each shoulder buckle 35. The auxiliary buckle 37a is detachable from the auxiliary buckle 37b and is provided to prevent deviation of the running path of the rotation suppression belt 3.

[0033] The connection portion 21 is a connection portion of the waist band 2 with the rotation suppression belt 3. The connection portion 21, for example, as shown in FIG. 1 at connection portion 21a and connection portion 21b, connects the waist band 2 and the rotation suppression belt 3 by sewing. The connection portion 21 may be connected via a rotatable pivot connection portion 22, as shown in FIG. 2( a). The pivot connection portion 22 has a dot button 221 and a hook 222. The dot button 221 is a metal or plastic button attached to the waist band 2. The hook 222 is, for example, a metal hook. The hook 222 engages with the dot button 221 and is pivotally attached. The pivot connection portion 22 may be configured to have a plurality of dot buttons 221b, 221c, and 221d, as shown in FIG. 2( b). These dot buttons 221b, 221c, and 221d are provided at intervals along a plurality of the waist band 2 toward the hip area. The hook 222 may be engaged with any one of the dot buttons 221b, 221c, and 221d depending on the user's body type, waist size, and the like.

[0034] The trunk rotation restricting supporter 1 to which the present invention is applied is used, for example, as shown in Figure 3. The user wraps the waist band 2 around their waist and mates the male surface 25 of the hook-and-loop fastener with the female surface 26 of the hook-and-loop fastener to prevent rotation around the waist.

[0035] Next, a method for actually putting on a user the trunk rotation restricting supporter 1 configured as described above will be described.

[0036] FIG. 3(a) is a view from the front of a user wearing a trunk rotation limiting supporter 1 for the left shoulder from the right hip, and FIG. 3(b) is a view of the user from behind.

[0037] First, the waist band 2 is wrapped around the user's waist. Then, one end of the rotation inhibiting belt 3 is attached to the right hip 301 of the waist band 2. The rotation inhibiting belt 3 is attached to the waist band 2 by engaging the dot button 221 with the hook 222, as shown in Fig. 2 above. Note that the rotation inhibiting belt 3 shown in Fig. 3 with a solid line indicates a line that is exposed on the directly visible surface, while the rotation inhibiting belt 3 shown in Fig. 3 with a dotted line indicates a line that is hidden on the back of the user's body.

[0038] The rotation inhibiting belt 3, one end of which is attached to the right hip 301, is pulled up to the left armpit 302, and then pulled further upward from the left armpit 302 and wrapped around the left shoulder 303. Then, the rotation inhibiting belt 3 wrapped around the left shoulder 303 is pulled down to the right hip 301, and the other end of the rotation inhibiting belt 3 is attached to the waist band 2.

[0039] FIG. 4(a) is a view from the front of a user wearing a trunk rotation limiting supporter 1 for the right shoulder from the left hip, and FIG. 4(b) is a view of the user from behind.

[0040] First, the waist band 2 is wrapped around the user's waist. Then, one end of the rotation inhibiting belt 3 is attached to the left hip 401 of the waist band 2. The rotation inhibiting belt 3 is attached to the waist band 2 by engaging the dot button 221 with the hook 222, as shown in Fig. 2 above. Note that the rotation inhibiting belt 3 shown by a solid line in Fig. 4 indicates a line that is exposed on the directly visible surface, while the rotation inhibiting belt 3 shown by a dotted line in Fig. 4 indicates a line that is hidden on the back side of the user's body.

[0041] The rotation inhibiting belt 3, one end of which is attached to the left hip 401, is pulled up to the right underarm 402, and then pulled further upward from the right underarm 402 and wrapped around the right shoulder 403. Then, the rotation inhibiting belt 3 wrapped around the right shoulder 403 is pulled down to the left hip 401, and the other end of the rotation inhibiting belt 3 is attached to the waist band 2.

[0042] As described above, the rotation suppression belt 3 does not necessarily have to be attached to the waist belt at the same position between one end and the other end.

[0043] 5(a) is a top view of a user wearing trunk rotation restricting supporter 1 for the left shoulder, and shows an example in which one end 3a of rotation inhibiting band 3 extending to left underarm 302 is attached near right hip 301, and the other end 3b of rotation inhibiting band 3 is attached near posterior right pelvis 307. In other words, one end 3a of rotation inhibiting band 3 may be attached anywhere from posterior right pelvis 307 to anterior right pelvis 306 via right hip 301, and the other end 3b of rotation inhibiting band 3 may be attached anywhere from posterior right pelvis 307 to anterior right pelvis 306 via right hip 301.

[0044] 5(b) is a top view of a user wearing trunk rotation restricting supporter 1 for the right shoulder, and shows an example in which one end 3a of rotation inhibiting band 3 extending to left underarm 402 is attached near the front of left pelvis 406, and the other end 3b of rotation inhibiting band 3 is attached near left hip 401. In other words, one end 3a of rotation inhibiting band 3 may be attached anywhere from the rear of left pelvis 407 to the front of left pelvis 406 via left hip 401, and the other end 3b of rotation inhibiting band 3 may be attached anywhere from the rear of left pelvis 407 to the front of left pelvis 406 via left hip 401.

[0045] The rotation suppression band 3 attached to the user in this manner can provide the following effects.

[0046] As shown in Figure 3(a), the rotation inhibiting belt 3 in the trunk rotation restricting supporter 1 for the left shoulder according to the present invention has its other end extended from the left shoulder 303 and attached to the waist band 2 at a location between the right hip 301 and the front of the right pelvis 306. As a result, the rotation inhibiting belt 3 is attached in a state where it is pulled at a large incline toward the side (direction P) from the left shoulder 303 to the right hip 301 and the front of the right pelvis 306. As a result, as shown in Figure 3, large tensile force vectors act in the direction P and downward (direction Q) via the rotation inhibiting belt 3. In particular, by attaching the other end extended from the left shoulder 303 to a location between the right hip 301 and the front of the right pelvis 306 on the waist band 2, the ratio of the tensile force vector in the direction P to the tensile force vector in the direction Q can be increased.

[0047] As a result, this tensile force vector in the P direction acts as a large resistance to the force of the user turning their waist to the right, making it difficult for the user to turn their waist to the right. This rotation suppression belt 3 wraps around the left shoulder 303 and reaches the left armpit 302, so it can particularly suppress movement of the left arm forward. As a result, the user can move to the left side without resistance, but cannot easily turn to the right side.

[0048] As a result, in warehouses, factories, nursing homes, and the like, it is possible to restrict only the trunk rotation movement among the movements of rotating (twisting) the trunk while carrying a heavy object. For example, take the example of a user lifting a heavy object 51, such as luggage, and placing it on a platform 52 as shown in FIG. 6( a). As shown in FIG. 6( b), the user lifts the heavy object 51 upward. To place the object on a platform on the right side of the user, the user would normally attempt to turn to the right by rotating their waist while maintaining their posture. However, as described above, the rotation suppression belt 3 restricts the movement of the left arm forward, making it difficult for the user to turn to the right. Therefore, instead of rotating the upper body, including the waist, in other words, a so-called trunk rotation, the user can move their feet, i.e., their lower limbs, as shown in FIG. 6( c) or rotate their lower limbs to place the heavy object 51 on the platform 52 as shown in FIG. 6( d). In other words, this trunk rotation restricting supporter 1 naturally restricts trunk rotation of the upper body and naturally encourages the user to place the heavy object on the platform 52 on the user's right side by rotating the lower limbs. As a result, by naturally preventing trunk rotation while carrying heavy object 51, it is possible to prevent a large load from being placed on the lower back and reduce the risk of various musculoskeletal disorders, including spondylolysis and spondylolisthesis.

[0049] Although the above-described effects have been described using the trunk rotation restricting supporter 1 for the left shoulder as an example, the same applies when wearing the trunk rotation restricting supporter 1 for the right shoulder. As shown in FIG. 4( a), the other end of the rotation restricting belt 3 extending from the right shoulder 403 is attached to the waist band 2 at a location between the left hip 401 and the anterior left pelvis 406. As a result, the rotation restricting belt 3 is attached in a state where it is pulled at a large incline toward the side (direction P) from the right shoulder 403 to the left hip 401 and the anterior left pelvis 406. As a result, as shown in FIG. 4, large tensile force vectors act in the direction P and downward (direction Q) via the rotation restricting belt 3. In particular, by attaching the other end extending from the right shoulder 403 to a location between the left hip 401 and the anterior left pelvis 406 on the waist band 2, the ratio of the tensile force vector in the direction P to the tensile force vector in the direction Q can be increased.

[0050] As a result, the vector of the tensile force in the P direction acts as a large resistance to the force of the user turning their waist to the left, making it difficult for the user to turn their waist to the left. This rotation suppression belt 3 is designed to wrap around the right shoulder 403 and reach the right armpit 402, so it can particularly suppress the movement of the right arm forward. As a result, the user can easily turn to the right, but cannot easily turn to the left.

[0051] The trunk rotation restricting supporter 1 for the left shoulder also makes it difficult to turn to the left, so the user is naturally encouraged to rotate their lower limbs rather than rotating the upper body, including the waist, in other words. As a result, by similarly naturally preventing trunk rotation, it is possible to prevent a large load from being placed on the waist and reduce the risk of various musculoskeletal disorders, including spondylolysis and spondylolisthesis.

[0052] The trunk rotation restricting supporter 1, which is provided for both the right and left shoulders, can suppress trunk rotation to both the left and right sides, thereby naturally encouraging rotation of the lower limbs in either the left or right direction.

[0053] The following describes the results of experimental verification of the effects of the trunk rotation restricting supporter 1 to which the present invention is applied.

[0054] First, Figure 7 shows the results of measuring maximum rotation for an example of the present invention in which a subject wore a trunk rotation restricting supporter 1 incorporating the present invention, and a comparative example in which the subject was not wearing the trunk rotation restricting supporter 1. This measurement of maximum rotation measured the angle (°) at which the body could be rotated to the limit in a standing position without changing foot position. The angle was measured using a three-dimensional motion analysis device (OptiTrack).

[0055] The subjects were 22 young males, and the bar graph in the figure shows the average value and standard deviation of the angle (°) of maximum rotation.

[0056] As shown in Figure 7(a), the maximum rotation of the lower limbs was similar in both the example of the present invention and the comparative example. On the other hand, the maximum rotation angle of the trunk in the example of the present invention was less than 30°, which was clearly lower than the comparative example, which exceeded 40°. These results show that the trunk rotation limiting supporter 1 can effectively suppress trunk rotation.

[0057] 7B shows the trunk ratio calculated for the example of the present invention and the comparative example. The trunk ratio is expressed as trunk rotation / lower limb rotation×100 (%), and a higher trunk ratio indicates a higher proportion of trunk rotation.

[0058] The trunk ratio in the comparative example was about 70%, while in the example of the present invention it was over 40%, meaning that the trunk ratio in the example of the present invention was nearly 30% lower than in the comparative example. These results show that the trunk rotation restriction supporter 1 can effectively suppress trunk rotation.

[0059] Next, subjects in the present invention and comparative examples were asked to lift a 12 kg weight from the floor and rotate it up to 90°, and the rotation angles of the lower limbs and trunk at 30°, 60°, and 90° were measured. Figure 8(a) shows the measurement results for the rotation angle at 30°, Figure 8(b) shows the measurement results for the rotation angle at 60°, and Figure 8(c) shows the measurement results for the rotation angle at 90°. Twenty-two subjects participated, and the bar graphs in the figures show the average and standard deviation of the rotation angle (°).

[0060] As shown in Figures 8(a) to 8(c), it is clearly shown that the present invention reduces the trunk rotation angle compared to the comparative example at angles of 30°, 60°, and 90°.

[0061] As shown in Figure 8(d), when viewed in terms of trunk ratio, it can be seen that the trunk ratio of the example of the present invention is clearly lower than that of the comparative example. These results show that the trunk rotation restriction supporter 1 can effectively suppress trunk rotation.

[0062] Another example of a trunk rotation restricting supporter will be described with reference to FIGS. 9 to 14 . The trunk rotation restricting supporter 1A restricts the rotation of the trunk of a user such as a worker. For example, the trunk rotation restricting supporter 1A is at least partially covered with fabric 41A to form a work jacket 10. The fabric 41A is, for example, a mesh fabric. In other words, the work jacket 10 includes the trunk rotation restricting supporter 1A and fabric 41A. The work jacket 10 including fabric 41A may be referred to as a trunk rotation restricting supporter. FIG. 9 is a diagram showing the front side of another example of a trunk rotation restricting supporter. FIG. 10 is a diagram showing the back side of another example of a trunk rotation restricting supporter. FIG. 11 is a diagram showing the back side of an example of a trunk rotation restricting supporter worn by a user. In Figure 11, the two-dot chain lines do not indicate the shape of an object, but are imaginary lines that indicate objects that exist within the area surrounded by the two-dot chain lines. The trunk rotation restriction supporter 1A in this modified example includes a first attachment part 2A and a second attachment part 3A. In this modified example, the trunk rotation restriction supporter 1A includes a pair of second attachment parts 3A.

[0063] The first attachment part 2A is attached around the waist of the user US. The first attachment part 2A is, for example, belt-shaped and is wrapped around the waist of the user US. The first attachment part 2A corresponds to, for example, a waist belt. The first attachment part 2A is, for example, wrapped around the pelvis. When the first attachment part 2A is attached to the user US, the first attachment part 2A extends along the horizontal direction. As a further modification, the first attachment part 2A may be bottoms including a portion attached around the waist of the user US.

[0064] The first attachment unit 2A includes a region PA connected to the second attachment unit 3A. The region PA is located on the side of the waist of the user US when the first attachment unit 2A is attached to the user US. In this modification, the region PA includes a pair of regions PA1, PA2 connected to each of the pair of second attachment units 3A. For example, the pair of regions PA1, PA2 are each located on one of the left and right waists of the user US when the first attachment unit 2A is attached to the user US. For example, when the first attachment unit 2A is attached to the user US, the region PA1 is located on the right waist of the user US, and the region PA2 is located on the left waist of the user US.

[0065] FIG. 12 shows a portion of the trunk rotation restriction supporter as viewed vertically. When the first attachment unit 2A is attached to the user US, the region PA of the first attachment unit 2A is located within a predetermined angle θ1 from the position SP below the navel of the user US to either the left or right of the user US, as viewed vertically. The predetermined angle θ1 is, for example, 0° to 120°. The predetermined angle θ1 may be, for example, 60° to 120°. For example, a predetermined angle θ1 of 60° or greater improves the user's workability. The region PA1 of the first attachment unit 2A is located within a predetermined angle θ1 from the position SP below the navel of the user US to the right of the user US, as viewed vertically. The region PA2 of the first attachment unit 2A is located within a predetermined angle θ1 from the position SP below the navel of the user US to the left of the user US, as viewed vertically.

[0066] The area PA1 of the first mounting portion 2A is located anywhere from the outer side of the right upper posterior iliac crest to the front of the right pelvis. The area PA2 of the first mounting portion 2A is located anywhere from the outer side of the left upper posterior iliac crest to the front of the left pelvis.

[0067] FIG. 13 shows the first mounting portion in a worn state. FIG. 14 shows the first mounting portion in a partially worn state. In this modified example, the area PA of the first mounting portion 2A includes a plurality of dot buttons DB, as shown in FIG. 14 . The plurality of dot buttons DB are arranged in the longitudinal direction of the first mounting portion 2A. In other words, when the user US is wearing the first mounting portion 2A, the plurality of dot buttons DB are arranged in the direction of the user US's waist. Each dot button DB engages with one end of the second mounting portion 3A. When the first mounting portion 2A and the second mounting portion 3A are worn by the user US, the plurality of dot buttons DB are located within a range of 0 to 120 degrees to either the left or right of a position below the user US's navel, as viewed vertically.

[0068] Fig. 15 shows a portion of a modified trunk rotation restriction supporter. As shown in Fig. 15, the area PA of the first attachment portion 2A may be sewn to one end of the second attachment portion 3A. As a further modified example, the area PA of the first attachment portion 2A may be adhered to one end of the second attachment portion 3A with an adhesive or the like.

[0069] The first attachment unit 2A includes, for example, an inner belt portion 21A and an outer belt portion 27A. The inner belt portion 21A is wrapped around the waist of the user US, and the outer belt portion 27A is wrapped around the waist of the user US so as to cover the inner belt portion 21A. The inner belt portion 21A includes a pair of end portions 22A. The pair of end portions 22A are connected to each other. As shown in FIG. 13 , for example, the outer belt portion 27A is connected to the inner belt portion 21A while covering the inner belt portion 21A. For example, a region PA that is connected to the second attachment unit 3A is provided on the inner belt portion 21A. When the first attachment unit 2A is worn by the user US, the region PA is covered by the outer belt portion 27A.

[0070] The inner belt portion 21A has an inner surface 23A and an outer surface 24A located on opposite sides of each other. The inner surface 23A faces the user US when the user US is wearing the first attachment portion 2A. The inner surface 23A may have a non-slip surface formed thereon to prevent the first attachment portion 2A from rotating around the waist.

[0071] The inner belt portion 21A includes, for example, hook-and-loop fasteners 25A and 26A, which are connected to each other by engagement between the hook-and-loop fasteners 25A and 26A. For example, the hook-and-loop fastener 25A constitutes at least a portion of the inner surface 23A of the inner belt portion 21A. The hook-and-loop fastener 26A constitutes at least a portion of the outer surface 24A of the inner belt portion 21A. The pair of end portions 22A are connected to each other by engagement between the hook-and-loop fasteners 25A and 26A.

[0072] The outer belt portion 27A has an inner surface 28A that faces the outer surface 24A of the inner belt portion 21A. The outer belt portion 27A includes, for example, a hook-and-loop fastener 29A. For example, the hook-and-loop fastener 29A constitutes at least a portion of the inner surface 28A of the outer belt portion 27A. The outer belt portion 27A and the inner belt portion 21A are connected to each other by engagement between the hook-and-loop fastener 26A and the hook-and-loop fastener 29A.

[0073] The pair of second attachment parts 3A includes a second attachment part 31A and a second attachment part 32A that are separate from each other. The second attachment part 31A and the second attachment part 32A are not directly connected. The second attachment part 31A is for the left shoulder, and the second attachment part 32A is for the right shoulder. The second attachment part 31A and the second attachment part 32A correspond to, for example, rotation suppression bands. One end of the second attachment part 31A and the second attachment part 32A is connected to the first attachment part 2A only at a region PA. Each of the second attachment parts 31A and 32A is worn around one of the left and right shoulders of the user US, and is connected to the first attachment part 2A only at a region PA that is located on the other of the left and right waists of the user US when the first attachment part 2A is worn on the user US. For example, the second attachment unit 31A is attached around the left shoulder of the user US and is connected to the first attachment unit 2A only at a region PA1 located on the right hip of the user US when the first attachment unit 2A is attached to the user US. The second attachment unit 32A is attached around the right shoulder of the user US and is connected to the first attachment unit 2A only at a region PA2 located on the left hip of the user US when the first attachment unit 2A is attached to the user US.

[0074] When the first mounting portion 2A and the second mounting portion 31A are attached to the user US, the second mounting portion 31A extends from the area PA1 of the first mounting portion 2A toward the left shoulder of the user US. When the first mounting portion 2A and the second mounting portion 32A are attached to the user US, the second mounting portion 32A extends from the area PA2 of the first mounting portion 2A toward the right shoulder of the user US.

[0075] In the example shown in this embodiment, for example, when the first mounting portion 2A and the second mounting portion 31A are attached to the user US, the second mounting portion 31A extends in a fan shape from a portion PA1 of the first mounting portion 2A. For example, when the first mounting portion 2A and the second mounting portion 32A are attached to the user US, the second mounting portion 32A extends in a fan shape from a portion PA2 of the first mounting portion 2A.

[0076] Each of the pair of second attachment parts 3A includes a back extension part 36A, a shoulder extension part 37A, a chest extension part 38A, and a connecting part 39A. The back extension part 36A extends in a fan shape from a region PA of the first attachment part 2A when the first attachment part 2A and the second attachment part 3A are attached to the user US.

[0077] As shown in FIG. 11 , when the first mounting portion 2A and the second mounting portion 3A are attached to the user US, the back extension portion 36A extends from the area PA of the first mounting portion 2A at a predetermined angle θ2. The predetermined angle θ2 is the maximum angle of the edge of the back extension portion 36A extending from the area PA of the first mounting portion 2A as an apex. The predetermined angle θ2 is, for example, 20° to 60°. The edge of the back extension portion 36A closest to the horizontal direction HL is inclined at a predetermined angle θ3 with respect to the horizontal direction HL when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The predetermined angle θ3 is the minimum angle between the edge of the back extension portion 36A and the horizontal direction HL. The predetermined angle θ3 is, for example, 10° to 45° when the first mounting portion 2A and the second mounting portion 3A are attached to the user US.

[0078] The shoulder extension portion 37A and the chest extension portion 38A extend from the back extension portion 36A. The connecting portion 39A connects the shoulder extension portion 37A and the chest extension portion 38A. For example, the shoulder extension portion 37A, the chest extension portion 38A, and the connecting portion 39A each have a belt shape.

[0079] For example, when the first mounting unit 2A and the second mounting unit 31A are attached to the user US, the back extension portion 36A of the second mounting unit 31A extends in a fan shape from the area PA1 of the first mounting unit 2A toward the left shoulder of the user US. When the first mounting unit 2A and the second mounting unit 31A are attached to the user US, the shoulder extension portion 37A of the second mounting unit 31A extends from the back extension portion 36A along the left shoulder of the user US, and the chest extension portion 38A of the second mounting unit 31A extends from the back extension portion 36A along the left chest of the user US. When the first mounting unit 2A and the second mounting unit 31A are attached to the user US, the connecting portion 39A of the second mounting unit 31A connects the shoulder extension portion 37A and the chest extension portion 38A on the front side of the user US.

[0080] For example, when the first mounting unit 2A and the second mounting unit 32A are attached to the user US, the back extension portion 36A of the second mounting unit 32A extends in a fan shape from the area PA2 of the first mounting unit 2A toward the right shoulder along the back of the user US. When the first mounting unit 2A and the second mounting unit 32A are attached to the user US, the shoulder extension portion 37A of the second mounting unit 32A extends from the back extension portion 36A along the right shoulder of the user US, and the chest extension portion 38A of the second mounting unit 32A extends from the back extension portion 36A along the right chest of the user US. When the first mounting unit 2A and the second mounting unit 32A are attached to the user US, the connecting portion 39A of the second mounting unit 32A connects the shoulder extension portion 37A and the chest extension portion 38A on the front side of the user US.

[0081] In this modification, the back extension portion 36A includes a first strap portion 46 and a second strap portion 47, each of which has a strap shape. The first strap portion 46 is connected at one end to the area PA of the first attachment portion 2A and at the other end to the shoulder extension portion 37A. The second strap portion 47 is connected at one end to the area PA of the first attachment portion 2A and at the other end to the chest extension portion 38A.

[0082] For example, the back extension portion 36A, shoulder extension portion 37A, chest extension portion 38A, and connecting portion 39A are integrally formed. In this modification, the back extension portion 36A, shoulder extension portion 37A, chest extension portion 38A, and connecting portion 39A all have a belt shape. The back extension portion 36A, shoulder extension portion 37A, chest extension portion 38A, and connecting portion 39A are formed, for example, from a single continuous belt. For example, the end of the back extension portion 36A and the end of the shoulder extension portion 37A are integrally connected, the end of the back extension portion 36A and the end of the chest extension portion 38A are integrally connected, and the end of the chest extension portion 38A and the end of the connecting portion 39A are integrally connected.

[0083] For example, when the first attachment unit 2A and the second attachment unit 31A are attached to the user US, the second attachment unit 31A is positioned as follows: One end of the first strap 46 is attached to a location on the first attachment unit 2A between the rear of the right pelvis and the front of the right pelvis via the right hip. The first strap 46 extends from a location on the first attachment unit 2A between the rear of the right pelvis and the front of the right pelvis via the right hip toward the left shoulder and is connected to one end of the shoulder extension 37A. The shoulder extension 37A extends from the other end of the first strap 46, around the left shoulder, and is connected to one end of the connecting portion 39A at the left collarbone. The connecting portion 39A extends from the left collarbone to the left armpit and is connected to one end of the chest extension 38A. The chest extension portion 38A is connected from the other end of the connecting portion 39A through the left armpit to one end of the second belt portion 47, and the second belt portion 47 extends from the other end of the chest extension portion 38A toward any point on the first attachment portion 2A between the rear of the right pelvis and the front of the right pelvis via the right hip. The other end of the second belt portion 47 is attached to any point on the first attachment portion 2A between the rear of the right pelvis and the front of the right pelvis via the right hip. The other end of the second belt portion 47 is connected to one end of the first belt portion 46.

[0084] As shown in FIG. 11 , the edge of the second band portion 47 closest to the horizontal direction HL is inclined at a predetermined angle θ3 with respect to the horizontal direction HL when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The predetermined angle θ3 is the minimum angle between the edge of the second band portion 47 and the horizontal direction HL. The predetermined angle θ3 is, for example, 10° to 45° when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The edge of the first band portion 46 closest to the horizontal direction HL is inclined at a predetermined angle θ4 with respect to the horizontal direction HL when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The predetermined angle θ4 is the minimum angle between the edge of the first band portion 46 and the horizontal direction HL. The predetermined angle θ4 is, for example, 30° to 80° when the first mounting portion 2A and the second mounting portion 3A are attached to the user US.

[0085] 11 , the first band portion 46 has a center line CL1. The center line CL1 passes through the center of the width of the first band portion 46 and extends in the length direction of the first band portion 46. The center line CL1 extends in a direction perpendicular to the width direction of the first band portion 46. In this modification, when the first attachment portion 2A and the second attachment portion 31A are attached to the user US, the center line CL1 passes through the center of the width of the shoulder extension portion 37A from the back to the shoulder of the user US and extends in the length direction of the shoulder extension portion 37A.

[0086] The second band portion 47 has a center line CL2. The center line CL2 passes through the center of the width of the second band portion 47 and extends in the length direction of the second band portion 47. The center line CL2 extends in a direction perpendicular to the width direction of the second band portion 47. In this modification, when the first attachment portion 2A and the second attachment portion 31A are attached to the user US, the center line CL2 passes through the center of the width of the chest extension portion 38A from the back to the armpit of the user US and extends in the length direction of the chest extension portion 38A.

[0087] When the first mounting portion 2A and the second mounting portion 3A are attached to the user US, the angle θ12 between the center line CL1 and the center line CL2 is, for example, 20° to 55°. The angle θ12 may be, for example, 20° to 45° when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The center line CL2 is inclined at a predetermined angle θ13 with respect to the horizontal direction HL when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The predetermined angle θ13 is, for example, 10° to 50° when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The predetermined angle θ13 may be, for example, 20° to 35° when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The center line CL1 is inclined at a predetermined angle θ14 with respect to the horizontal direction HL when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The predetermined angle θ14 is, for example, 35° to 85° when the first mounting portion 2A and the second mounting portion 3A are attached to the user US. The predetermined angle θ14 may be, for example, 40° to 65° when the first mounting portion 2A and the second mounting portion 3A are attached to the user US.

[0088] For example, when the first attachment unit 2A and the second attachment unit 32A are attached to the user US, the second attachment unit 32A is positioned as follows: One end of the first strap 46 is attached to a location on the first attachment unit 2A between the rear of the left pelvis and the front of the left pelvis via the left hip. The first strap 46 extends from a location on the first attachment unit 2A between the rear of the left pelvis and the front of the left pelvis via the left hip toward the right shoulder and is connected to one end of the shoulder extension 37A. The shoulder extension 37A extends from the other end of the first strap 46, around the right shoulder, and is connected to one end of the connecting portion 39A at the right collarbone. The connecting portion 39A extends from the right collarbone to the right armpit and is connected to one end of the chest extension 38A. The chest extension portion 38A is connected from the other end of the connecting portion 39A through the right underarm to one end of the second belt portion 47, and the second belt portion 47 extends from the other end of the chest extension portion 38A toward any point on the first attachment portion 2A between the rear of the left pelvis and the front of the right pelvis via the left hip. The other end of the second belt portion 47 is attached to any point on the first attachment portion 2A between the rear of the left pelvis and the front of the left pelvis via the left hip. The other end of the second belt portion 47 is connected to one end of the first belt portion 46.

[0089] In this modification, the second attachment portion 31A further includes a buckle 61. The second attachment portion 32A further includes a buckle 62. The buckles 61 and 62 are located, for example, at the connection portion between the shoulder extension portion 37A and the connection portion 39A. The buckles 61 and 62 are formed from at least one selected from the group consisting of polyacetal, nylon, polypropylene, polycarbonate, ABS resin, polyethylene terephthalate, and polyurethane.

[0090] The buckle 61 includes, for example, a pair of buckles 61a, 61b that engage with each other. The buckle 62 includes, for example, a pair of buckles 62a, 62b that engage with each other. The shoulder extension 37A of the second attachment portion 31A includes a buckle 61a. The connecting portion 39A of the second attachment portion 31A includes a buckle 61b. The shoulder extension 37A of the second attachment portion 32A includes a buckle 62a. The connecting portion 39A of the second attachment portion 32A includes a buckle 62b.

[0091] As a further modification, the buckles 61 and 62 may each be configured as a single, inseparable member. In this case, for example, at least one end of the shoulder extension 37A and the connecting portion 39A of the second attachment portion 31A is threaded through a hole in the buckle 61 and releasably locked to the buckle 61. Similarly, for example, at least one end of the shoulder extension 37A and the connecting portion 39A of the second attachment portion 32A is threaded through a hole in the buckle 62 and releasably locked to the buckle 62.

[0092] In this modified example, the first band portion 46 and the second band portion 47 are formed from a single continuous band. The first band portion 46 and the second band portion 47 are integrally connected at their respective ends. For example, the second mounting portion 3A includes a sliding mechanism SL, in the region PA of the first mounting portion 2A, along which the band formed by the first band portion 46 and the second band portion 47 slides. The sliding mechanism SL includes, for example, an annular support portion 48, as shown in FIG. 14 . The support portion 48 may be non-annular and formed in a hook shape. In the sliding mechanism SL, the band formed by the first band portion 46 and the second band portion 47 is inserted into an opening in the support portion 48 and slides on an inner peripheral portion 48a of the support portion 48.

[0093] The support portion 48 engages with, for example, one of the multiple dot buttons DB. The support portion 48 is detachable from the dot buttons DB. For example, the dot button DB is inserted into an opening in the support portion 48 and abuts against an inner peripheral portion 48a of the support portion 48. When the first attachment portion 2A and the second attachment portion 3A are attached to the user US, the inclination angle of the spine extension portion 36A relative to the horizontal direction is changed depending on the position of the dot button DB with which the support portion 48 engages. When the first attachment portion 2A and the second attachment portion 3A are attached to the user US, the inclination angle of the spine extension portion 36A relative to the first attachment portion 2A is changed depending on the position of the dot button DB with which the support portion 48 engages.

[0094] The second attachment portion 3A is, for example, non-elastic. The material of the second attachment portion 3A is, for example, a material with an elasticity rate of less than 35%. The second attachment portion 3A is, for example, made of synthetic resin. The material of the second attachment portion 3A is, for example, nylon, acrylic, etc. The second attachment portion 3A is, for example, a band made by processing the fibers of the material into a woven or knitted fabric. The width of the second attachment portion 3A is, for example, 10 mm to 80 mm. The width of the second attachment portion 3A is, for example, constant. The width of the second attachment portion 3A may vary partially depending on how force is applied.

[0095] In this modified example, the second attachment unit 3A is covered with fabric 41A. For example, the second attachment unit 3A is separate from the fabric 41A. For example, the second attachment unit 3A is not connected to the fabric 41A. For example, the fabric 41A constitutes clothing. The clothing is, for example, a vest. For example, the second attachment unit 3A is disposed inside clothing constituted by the fabric 41A. The fabric 41A is configured so that, when the second attachment unit 3A is worn on the user US, the fabric 41A is positioned between the second attachment unit 3A and the user US. When the second attachment unit 3A is worn on the user US, the second attachment unit 3A is configured so that the second attachment unit 3A is positioned between the fabric 41A and the user US.

[0096] Next, a trunk rotation restriction supporter in a further modified example will be described with reference to Fig. 16. Fig. 16 is a diagram showing the back side of yet another example of a trunk rotation restriction supporter. This modified example is generally similar to or the same as the example described above. This modified example differs from the example described above in terms of the shape of the trunk rotation restriction supporter. Below, the differences from the example described above will be mainly described.

[0097] In this modified example, trunk rotation restriction supporter 1B includes a pair of second mounting portions 3B instead of the pair of second mounting portions 3A. The pair of second mounting portions 3B includes second mounting portions 31B and 32B that are separate from each other. Second mounting portions 31B and 32B are not directly connected. Second mounting portions 31B and 32B each include a back extension portion 36B instead of back extension portion 36A.

[0098] The back extension portion 36B of each of the second mounting portions 31B and 32B does not include the first band portion 46 or the second band portion 47, but includes a single member 76. The member 76 has, for example, a fan shape. The member 76 of the second mounting portion 31B extends in a fan shape from the portion PA1 of the first mounting portion 2A. The member 76 of the second mounting portion 32B extends in a fan shape from the portion PA2 of the first mounting portion 2A.

[0099] When the first attachment unit 2A and the second attachment unit 31B are attached to the user US, the member 76 of the second attachment unit 31B extends in a fan shape from the area PA1 of the first attachment unit 2A toward the left shoulder along the back of the user US. When the first attachment unit 2A and the second attachment unit 31B are attached to the user US, the shoulder extension portion 37A of the second attachment unit 31B extends from the member 76 of the second attachment unit 31B along the left shoulder of the user US, and the chest extension portion 38A of the second attachment unit 31B extends from the member 76 of the second attachment unit 31B along the left chest of the user US.

[0100] When the first attachment unit 2A and the second attachment unit 32B are attached to the user US, the member 76 of the second attachment unit 32B extends in a fan shape from the area PA2 of the first attachment unit 2A toward the left shoulder along the back of the user US. When the first attachment unit 2A and the second attachment unit 32B are attached to the user US, the shoulder extension portion 37A of the second attachment unit 32B extends from the member 76 of the second attachment unit 32B along the left shoulder of the user US, and the chest extension portion 38A of the second attachment unit 32B extends from the member 76 of the second attachment unit 32B along the left chest of the user US.

[0101] 16 , when the first mounting portion 2A and the second mounting portion 3B are attached to the user US, the member 76 extends from the area PA of the first mounting portion 2A at a predetermined angle θ5. The predetermined angle θ5 is the maximum angle of the edge of the member 76 that extends from the area PA of the first mounting portion 2A as its apex. The predetermined angle θ5 is, for example, 20° to 60°.

[0102] The edge of the member 76 closest to the horizontal direction HL is inclined at a predetermined angle θ6 with respect to the horizontal direction HL. The predetermined angle θ6 is the smallest angle between the edge of the member 76 and the horizontal direction HL. The predetermined angle θ6 is, for example, 10° to 45° when the first mounting part 2A and the second mounting part 3B are attached to the user US.

[0103] Next, a trunk rotation restriction supporter in a further modified example will be described with reference to Fig. 17. Fig. 17 is a diagram showing the back side of yet another example of a trunk rotation restriction supporter. This modified example is generally similar to or the same as the example described above. This modified example differs from the example described above in terms of the shape of the trunk rotation restriction supporter. Below, the differences from the example described above will be mainly described.

[0104] In this modified example, the trunk rotation restriction supporter 1C includes a pair of second attachment portions 3C instead of the pair of second attachment portions 3A. The pair of second attachment portions 3C includes a second attachment portion 31C and a second attachment portion 32C that are separate from each other. The second attachment portions 31C and 32C are not directly connected. The second attachment portions 31C and 32C each include a back extension portion 36C, a shoulder extension portion 37C, and a chest extension portion 38C instead of the back extension portion 36A, the shoulder extension portion 37A, and the chest extension portion 38A.

[0105] The extension portion 36C of each of the second mounting portions 31C and 32C does not include the first band portion 46 or the second band portion 47, but instead includes a single band portion 86. The band portion 86 has, for example, a band shape.

[0106] When the first attachment unit 2A and the second attachment unit 31C are attached to the user US, the strap 86 of the second attachment unit 31C extends from the area PA1 of the first attachment unit 2A toward the left shoulder along the back of the user US. In the second attachment unit 31C, the strap 86 includes a first end connected to the area PA1 and a second end connected to the shoulder extension 37C and the chest extension 38C. The second attachment unit 31C is bifurcated along the left shoulder from the second end of the strap 86 extending from the area PA1 of the first attachment unit 2A. When the first attachment unit 2A and the second attachment unit 31C are attached to the user US, the strap 86, the shoulder extension 37C, and the chest extension 38C form a Y-shape along the back of the user US. When the first attachment part 2A and the second attachment part 31C are attached to the user US, the shoulder extension part 37C of the second attachment part 31C extends from the belt part 86 of the second attachment part 31C along the left shoulder of the user US, and the chest extension part 38C of the second attachment part 31C extends from the belt part 86 of the second attachment part 31C along the left chest of the user US.

[0107] When the first attachment unit 2A and the second attachment unit 32C are attached to the user US, the strap 86 of the second attachment unit 32C extends from the area PA2 of the first attachment unit 2A toward the right shoulder along the back of the user US. In the second attachment unit 32C, the strap 86 includes a first end connected to the area PA2 and a second end connected to the shoulder extension 37C and the chest extension 38C. The second attachment unit 32C is bifurcated along the right shoulder from the second end of the strap 86 extending from the area PA1 of the first attachment unit 2A. When the first attachment unit 2A and the second attachment unit 32C are attached to the user US, the strap 86, the shoulder extension 37C, and the chest extension 38C form a Y-shape along the back of the user US. When the first attachment part 2A and the second attachment part 32C are attached to the user US, the shoulder extension part 37C of the second attachment part 32C extends from the belt part 86 of the second attachment part 32C along the right shoulder of the user US, and the chest extension part 38C of the second attachment part 32C extends from the belt part 86 of the second attachment part 32C along the left chest of the user US.

[0108] 17 , the edge of the band portion 86 closest to the horizontal direction HL is inclined at a predetermined angle θ7 with respect to the horizontal direction HL. The predetermined angle θ7 is the minimum angle between the edge of the band portion 86 and the horizontal direction HL. The predetermined angle θ7 is, for example, 20° to 70° when the first attachment portion 2A and the second attachment portion 3C are attached to the user US.

[0109] 17 , the band portion 86 of the second attachment portion 31C has a center line CL21. The center line CL21 passes through the center of the width of the band portion 86 and extends in the length direction of the band portion 86. The center line CL21 extends in a direction perpendicular to the width direction of the band portion 86. In this modification, when the first attachment portion 2A and the second attachment portion 31C are attached to the user US, the center line CL21 passes through the center of the width of the shoulder extension portion 37A from the back to the shoulder of the user US and extends in the length direction of the shoulder extension portion 37A.

[0110] The center line CL21 is inclined at a predetermined angle θ17 with respect to the horizontal direction HL when the first attachment portion 2A and the second attachment portion 3C are attached to the user US. The predetermined angle θ17 is, for example, 20° to 70° when the first attachment portion 2A and the second attachment portion 3C are attached to the user US.

[0111] Next, the effects of the trunk rotation restriction supporters 1, 1A, 1B, and 1C will be described.

[0112] In the trunk rotation restricting supporter 1A, the first attachment part 2A is attached around the user's waist. The second attachment part 3A is attached around one of the user's left or right shoulders and is connected to the first attachment part 2A only at a region PA located at the other of the user's left or right waist. In this case, when the user's trunk rotates, tension is generated in the second attachment part 3A between the one of the user's left or right shoulder and the other of the user's left or right waist. Because the second attachment part 3A is connected only at the region PA located at the other of the user's left or right waist, the tension generated by the rotation of the user's trunk is difficult to disperse, and the component of this tension in the direction of trunk rotation is relatively large. Therefore, the rotation of the user's trunk is restricted with a relatively strong force. When the rotation of the user's trunk is restricted, the rotation of the trunk during work is compensated for by hip joint movement. This reduces the burden on the lower back and prevents lower back pain. The trunk rotation restricting supporters 1, 1B, and 1C have the same configuration as that described above, and provide the same effects.

[0113] The inventors of the present application have examined the effect of connecting the second attachment part 3A to the first attachment part 2A only at the region PA located on the other of the user's left and right hips. In this experiment, the trunk rotation angle was compared between a first case without a supporter, a second case in which the second attachment part 3A is connected only at the region of the first attachment part 2A located on the user's rear hip, and a third case in which the second attachment part 3A is connected only at the region of the first attachment part 2A located on the user's side hip. The trunk rotation angle in the second case was reduced by 15% compared to the first case. The trunk rotation angle in the third case was reduced by 30% compared to the first case. Specifically, the trunk rotation angle in the first case was 42.5°. The trunk rotation angle in the second case was 36.2°. The trunk rotation angle in the third case was, for example, 29.8°. In this verification, the number of samples was 11, and the p-values ​​of the results comparing the first case with the second case, the p-values ​​of the results comparing the first case with the third case, and the p-values ​​of the results comparing the second case with the third case were all less than 0.01.

[0114] The second attachment portion 3A may extend in a fan shape from the area PA of the first attachment portion 2A when the first attachment portion 2A and the second attachment portion 3A are worn by the user. In this case, the tension generated in the second attachment portion 3A is applied in a balanced manner around the user's shoulders while ensuring a component in the direction of trunk rotation. The trunk rotation restriction supporters 1, 1B, and 1C have a configuration similar to that described above and achieve similar effects.

[0115] The second attachment portion 3A includes a back extension portion 36A, a shoulder extension portion 37A, a chest extension portion 38A, and a connecting portion 39A. The back extension portion 36A may extend from the above-mentioned area PA of the first attachment portion 2A. The shoulder extension portion 37A and the chest extension portion 38A may each extend from the back extension portion 36A. The connecting portion 39A may connect the shoulder extension portion 37A and the chest extension portion 38A. When the first attachment unit 2A and the second attachment unit 3A are worn by the user, the back extension unit 36A extends in a fan shape along the user's back from the area PA of the first attachment unit 2A toward the shoulders, the shoulder extension unit 37A extends from the back extension unit 36A along the user's shoulders, the chest extension unit 38A extends from the back extension unit 36A along the user's lateral chest, and the connecting unit 39A connects the shoulder extension unit 37A and the chest extension unit 38A on the front side of the user. In this case, despite the relatively simple structure, the tension generated in the second attachment unit 3A ensures a trunk rotational component, and the tension generated in the second attachment unit 3A is applied in a balanced manner around the user's shoulders. The trunk rotation restriction supporters 1, 1B, and 1C have a similar configuration and achieve the same effects.

[0116] The first and second band portions 46 and 47 may be formed from a single band. The second attachment portion 3A may include a sliding mechanism SL that allows the band to slide at the area PA. In this case, the lengths of the first and second band portions 46 and 47 can be appropriately adjusted to suit the user's physique. The trunk rotation restriction supporter 1 has a similar configuration to the above and provides the same effects.

[0117] The back extension portion 36A, shoulder extension portion 37A, chest extension portion 38A, and connecting portion 39A may be formed from a single belt. In this case, while the structure is relatively simple, the tension of the second attachment portion 3A is less likely to be dispersed, and the rotational component of the trunk in the tension generated in the second attachment portion 3A is more reliably ensured. The trunk rotation restriction supporter 1 has a similar configuration to the above and provides the same effects.

[0118] When the first attachment part 2A is attached to the user, the region PA of the first attachment part 2A may be located in a range of 0 to 120 degrees to the other of the two sides from the position SP below the user's navel when viewed vertically. In this case, the rotational component of the trunk is more reliably secured in the tension generated in the second attachment part 3A. The trunk rotation restriction supporters 1, 1B, and 1C have a similar configuration to the above and provide similar effects.

[0119] The trunk rotation restriction supporter 1 may further include a fabric 41A separate from the second attachment portion 3A. The fabric 41A may be configured so that when the second attachment portion 3A is attached to the user, the fabric 41A is positioned between the second attachment portion 3A and the user. In this case, the second attachment portion 3A is prevented from getting caught on the user's body or on clothing worn by the user. The trunk rotation restriction supporters 1, 1B, and 1C have a similar configuration to the above and achieve the same effects.

[0120] The second attachment portion 3A may be configured so that, when the second attachment portion 3A is worn by the user, the second attachment portion 3A is positioned between the fabric 41A and the user. In this case, the second attachment portion 3A is prevented from getting caught on an obstacle or on clothing worn separately by the user. The trunk rotation restriction supporters 1, 1B, and 1C have a configuration similar to that described above and achieve the same effects.

[0121] Although examples of the present invention have been described above, the present invention is not necessarily limited to the above examples, and various modifications are possible without departing from the gist of the present invention.

[0122] For example, in the above example, only the shoulder extensions 37A, 37C, chest extensions 38A, 38C, and connecting portion 39A are shown to have a belt-like shape. However, the shapes of the shoulder extensions 37A, 37C, chest extensions 38A, 38C, and connecting portion 39A are not limited to this. For example, the shoulder extensions 37A, 37C, chest extensions 38A, 38C, and connecting portion 39A may be single-piece members having a shape other than a long shape.

[0123] For example, the trunk rotation restriction supporters 1, 1A, 1B, and 1C may be worn together with other supporters. For example, the trunk rotation restriction supporters 1, 1A, 1B, and 1C may be worn together with a supporter that supports the user's waist bending. In this case, the trunk rotation restriction supporters 1, 1A, 1B, and 1C may be covered by fabric 41 and 41A together with the other supporters. Even in this case, the second attachment portions 3A, 3B, and 3C are separate from the other supporters and are not directly connected to them.

[0124] In the above-described examples, the trunk rotation restriction supporters 1, 1A, 1B, and 1C have various buckles, such as the underarm buckle 33, the shoulder buckle 35, the auxiliary buckle 37, and the buckles 61 and 62. These buckles may be absent or may be provided in locations other than those shown in the above-described examples. When buckles are not provided, for example, the corresponding locations of the second attachment portion may be configured with a single belt. Furthermore, these buckles may have a mechanism for adjusting the length of a known belt. For example, the buckles 61 and 62 have a mechanism for adjusting the length of the shoulder extension portion 37A and the connecting portion 39A. The tension generated in the second attachment portion can be adjusted by adjusting the lengths of the back extension portion 36A, the shoulder extension portion 37A, the chest extension portion 38A, and the connecting portion 39A.

[0125] 1, 1A, 1B, 1C...body rotation restriction belt, 2...steel belt, 2A...first mounting part, 3...rotation suppression belt, 3A, 3B, 3C, 31A, 31 B, 31C, 32A, 32B, 32C...the second mounting part, 10...for operationャケット、36A,36B,36C…the back extends at the part,37A,37C……shoulder Extension part, 38A, 38C... chest extension part, 39A... connecting part, 41... メッシュ birthplace, 41A... birthplace, 46... first belt part, 47... second belt part, PA, PA1, PA2... position, SL... folding mechanism, SP... position, θ1, θ2, θ3, θ4, θ5, θ6, θ12, θ13, θ14, θ17... predetermined angles.

Claims

1. A trunk rotation restriction supporter comprising: a first attachment part attached around the waist of a user; and a second attachment part attached around one of the user's left or right shoulders and connected to the first attachment part, wherein the second attachment part is connected to the first attachment part only at a portion of the first attachment part that is located on the other of the user's left or right waist when the first attachment part is attached to the user; and wherein the second attachment part extends from the portion of the first attachment part towards the shoulder when the first attachment part and the second attachment part are attached to the user.

2. A trunk rotation restriction supporter as described in claim 1, wherein the second attachment portion extends in a fan shape from the portion of the first attachment portion when the first attachment portion and the second attachment portion are attached to the user.

3. A trunk rotation restriction supporter as described in claim 1 or 2, wherein the second attachment part includes a back extension part extending in a fan shape from the part of the first attachment part, a shoulder extension part extending from the back extension part, a chest extension part extending from the back extension part, and a connecting part connecting the shoulder extension part and the chest extension part, and when the first attachment part and the second attachment part are attached to the user, the back extension part extends in a fan shape from the part of the first attachment part towards the shoulders along the user's back, the shoulder extension part extends from the back extension part along the user's shoulders, and the chest extension part extends from the back extension part along the side of the user's chest, and the connecting part connects the shoulder extension part and the chest extension part on the front side of the user.

4. A trunk rotation restriction supporter as described in claim 3, wherein the back extension portion includes a first belt portion and a second belt portion each having a belt shape, the first belt portion is connected to the portion of the first attachment portion at one end and to the shoulder extension portion at the other end, and the second belt portion is connected to the portion of the first attachment portion at one end and to the chest extension portion at the other end.

5. A trunk rotation restriction supporter as described in claim 4, wherein the first belt portion and the second belt portion are formed from a single belt, and the second attachment portion includes a sliding mechanism that allows the belt to slide at the location.

6. A trunk rotation restriction supporter as described in claim 4, wherein the back extension portion, the shoulder extension portion, the chest extension portion, and the connecting portion are formed from a single belt.

7. A trunk rotation restriction supporter as described in claim 1, wherein when the first attachment part is attached to the user, the portion of the first attachment part is located in a range of 0 to 120 degrees from a position below the user's navel to the other of the left and right sides when viewed vertically.

8. A trunk rotation restriction supporter as described in claim 1, further comprising a fabric separate from the second attachment portion, the fabric being configured so that when the second attachment portion is attached to the user, the fabric is positioned between the second attachment portion and the user.

9. A trunk rotation restriction supporter as described in claim 1, further comprising a fabric separate from the second attachment part, wherein the second attachment part is configured so that when the second attachment part is attached to the user, the second attachment part is positioned between the fabric and the user.

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