JP2681500B2 - Pelvic tilt angle measuring device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pelvic tilt angle measuring device, and more specifically, for osteopathically treating various diseases based on abnormal pelvic tilt angles of a human body. In addition, the present invention relates to a pelvic tilt angle measuring device used to measure the pelvic tilt angle from the outside of the back surface of the human body and detect and grasp it as accurately as possible.

[Conventional technology]

As is well known, the pelvic tilt angle in the human body has a close relationship with the curvature and posture of the spine, and this pelvic tilt angle is generally seen from the lateral side of the body. Normally, it is said that the angle is about 60 degrees with respect to the vertical line (by Yunosuke Kaneko, "Japanese Anatomy").
That is, more specifically, this pelvic inclination angle is represented by the angle at which the straight line connecting the cape angle and the pubic symphysis crosses the horizontal line.

On the other hand, it is known that various diseases are caused based on the abnormality of the pelvic tilt angle, and in order to properly treat the disease caused by the abnormality of the pelvic tilt angle, first and foremost, However, it is important to accurately measure the pelvic inclination angle here and grasp the actual situation.

Since the lumbar and sacral areas including the pelvis in the skeleton of the human body, that is, the lumbosacral area, are present deep in the body, it is possible to estimate changes and abnormalities in the skeleton from the outside.
Compared with other skeletons, it is very difficult to measure the pelvic inclination angle of this kind, and in the usual case, the skeleton of the lumbar skeleton of the human body, which is anatomically and morphologically determined in advance, is usually used. Based on the aspect, in this case, the patient, that is, the lumbar skeleton of the subject is judged by an X-ray image visualized by X-ray imaging, or based on a practitioner's rule of thumb. It is a generally practiced method to make a judgment by observing the patient's appearance or by palpation.

[Problems to be solved by the invention]

However, in the case of the conventional pelvic tilt angle measuring and detecting means as described above, in the case of the former method, it is necessary to perform X-ray fluoroscopic examination on the subject one by one. It is relatively complicated, and there is a disadvantage that it is extremely difficult to make a clear image of the lumbar region itself, which is the object of imaging. Moreover, some subjects even dislike this type of X-ray fluoroscopy. This is not preferable, and in the latter method, since the judgment is based on the empirical rule by the practitioner, the lumbar skeleton of the subject does not always give a clear pelvic tilt angle. It was something that could not be detected.

Furthermore, from another standpoint, this kind of pelvic tilt angle measurement can generally be performed only from the front side of the human body, and of course, the measurement operation by the measurer is also performed on the lower abdomen of the subject. Since it is done in close proximity, it causes the subject to feel disgust or shame, the main part is easily pulled backward, and it is impossible to accurately measure the pelvic tilt angle. It was hot.

Therefore, the object of the present invention is to improve such conventional problems, to easily measure and grasp the form of the pelvic tilt angle from the outside of the back of the human body, and It is an object of the present invention to provide a pelvic tilt angle measuring device of this kind that can appropriately treat a disease based on an abnormality.

[Means for solving the problem]

In order to achieve the above-mentioned object, the pelvis tilt angle measuring device according to the present invention uses a main measuring rod to measure the tilt angle of the pelvis from the back side of the human body, and the front side of the pelvis on the front side. Abut on the iliac spine in the horizontal direction from the back side through the lateral side outward, and place the sub-measurement rod that is translated in parallel with the main measurement rod at the pubic joint upper edge position on the front side of the pelvis. The horizontal pelvis can be abutted from the rear side to the outside of the side, and the pelvic inclination angle can be measured by the vertical differential angle of both the main and auxiliary measuring rods. .

That is, the present invention is a device for measuring the tilt angle of the pelvis from the back side of the human body, and in the horizontal direction with respect to at least one of the right and left superior anterior iliac spines on the front side of the pelvis. The main measuring rod that abuts from the back side through the outside of the side, and the main measuring rod is moved in parallel to the main measuring rod, and similarly, with respect to the upper edge of the pubic symphysis on the front side, in the horizontal direction from the back side to the outside of the side. A pelvic tilt angle measuring device characterized in that it is provided with a sub-measurement rod that abuts against the pelvis, and the vertical differential angle between these main and sub-measurement rods can be detected as the pelvic tilt angle. A device for measuring the tilt angle of the pelvis from the back side of the human body, in which the main shaft shell is pivotally supported only in the middle part of the main shaft and the connecting rod is hung downward from the main shaft shell. At the same time, both ends of the main axis can be adjusted to correspond to the superior and inferior iliac spine positions. In this state, a pair of left and right main measuring rods having the measuring ends for abutting the superior anterior iliac spine from the front side at the tips that extend horizontally in the same length and are bent inward relative to each other. A main detection portion on the back side which is provided to project respectively, and an auxiliary shaft which is adjustable up and down in correspondence with the pubic joint upper edge position on the connecting rod, and which is parallel to the main axis in the same direction, and Left and right sides having measuring ends for abutting the pubic symphysis upper edge from the front side at the tips that extend on the auxiliary shaft in the same horizontal direction as the main measuring rod in the same horizontal direction and are bent inward with respect to each other. The relative differential angle between the sub-detection unit on the back side where a pair of sub-measurement rods is projected and the main and sub-measurement rods of the main and sub-detection units is defined as the pelvic tilt angle. And a tilt angle reading unit for reading as a pelvis tilt angle measuring device.

[Action]

Therefore, in the present invention, the main measuring rod is directly abutted horizontally from the rear side to the lateral outer side with respect to at least one of the left and right superior anterior iliac spines on the front side of the pelvis. In addition, the sub-measurement rod, which is translated in parallel with the main measurement rod and is also translated in parallel with the main measurement rod on the front side of the pubic bone joint in the horizontal direction, is also laterally outward from the rear side. It is possible to directly measure the pelvic tilt angle by detecting the vertical differential angle between the primary and secondary measuring rods by directly abutting the connecting rod. Maintaining in the vertical direction, a pair of left and right main measuring rods at the main detector,
With the condition that the sub-measurement rod in the sub-detection unit is maintained on the same vertical plane, with these left and right pairs of main measurement rod and sub-measurement rod maintained in the horizontal direction, respectively, The measurement end of each main measuring rod is directly abutted on the right and left superior anterior iliac spine positions from the rear side through the lateral side outward,
The sub-measurement rod is rotated about both sub-axes, and this sub-measurement rod is placed at the upper edge position of the pubic symphysis, directly from the back side through the lateral side outward,
By operating so as to abut, the differential angle of the sub-measurement rod with respect to each main measurement rod, that is, the angle corresponding to the amount of rotation of the sub-measurement rod, and consequently the main and sub-detection units The relative differential angle between them can be easily read by the tilt angle reading unit as the pelvic tilt angle, whereby the normal and abnormal forms of the pelvic position and the degree thereof can be easily determined. .

〔Example〕

An embodiment of a pelvic tilt angle measuring device according to the present invention will be described in detail below with reference to FIGS. 1 to 6.

FIG. 1 is a perspective view showing a schematic configuration of a pelvic tilt angle measuring apparatus to which this embodiment is applied, and FIGS. 2 to 4 are the same as FIG. 1 II-II line portion, III-III line portion, and IV in FIG. FIG. 3 is an enlarged cross-sectional view of a line IV part.

That is, in the configuration of the embodiment apparatus shown in FIGS. 1 to 3, this measurement apparatus is held in the horizontal direction and set on the back side corresponding to the left and right superior iliac spine positions on the pelvis. Main detection unit (1) and a sub-detection unit (2) that is rotatable relative to the main detection unit (1) and is similarly set on the back side corresponding to the pubic bone joint upper edge position on the pelvis. ) And an inclination angle reading unit (3) for reading a relative differential angle between the main and sub detecting units (1) and (2) as a desired pelvic inclination angle. .

Then, the main detection part (1) is located on the main shaft (11) and has a pair of presser rings (12) protruding in the axially intermediate part.
The main shaft shell (13) is constrained by the (12) and is pivotally supported only in the axial direction, and the connecting rod (14) is hung downward from the main shaft shell (13). In addition, a pair of left and right sliding pieces (16) are provided at both ends of the main shaft (11).
(16) and then keyway (11a) bored in the main shaft (11),
By using (11a) and the push screws (16a), (16a) screwed to the sliding pieces (16), (16), in the axial direction, in this case, on the pelvis of the subject described later. In order to correspond to the left and right superior anterior iliac spine positions from the back side, they are loosely inserted so that they can slide only in the width direction, and these sliding pieces (16), (16) are placed on these sliding pieces, In the same direction with each other, here, with the same length extending in the horizontal direction, in order to correspond to the superior anterior iliac spine that exists slightly laterally inward from the lateral part of the body, the measurement end is attached to the tip. (A), Bending rods (15a), (15a) having (a)
In order to be freely rotatable as shown by the arrow, a pair of left and right main measuring rods (15), (15), which are bent inward at right angles to each other and extended, are provided to project respectively. .

Further, the sub-detection section (2) is placed on the connecting rod (14) hanging downward from the main shaft shell (13), and the sliding piece (1
7) Then, in the axial direction, in order to correspond to the position of the upper edge of the pubic symphysis on the pelvis of the subject, which will be described later, in the same manner as above, the keyway (14) formed in the connecting rod (14) 14a) and a push screw (17a) screwed into the sliding piece (17) are used to loosely insert the sliding piece (17) in the height direction, and to the sliding piece (17). , A pair of left and right auxiliary shafts (18) and (18) facing each other, which are integrally connected to each other by a connecting frame (18a) and are integrated and are parallel to the main shaft (11) in the same direction ( 18a) and (18a) are rotatably pivotally supported, and a pair of left and right sliding pieces (20) and (20) are provided at both ends of the sub shafts (18) and (18). , Counter shaft (18), (1
Key groove (18b), (18b) drilled in 8) and each sliding piece (2
0), (20) screwed screw (20a), (20a), in the axial direction, this is the back side of the left and right pubic joints on the pelvis of the subject, which will be described later. To respond from
It is loosely inserted so that it can only slide freely in the width direction, and on each of these sliding pieces (20), (20), they are in the same direction, in this case, in the same length in the horizontal direction. In the extended state, in order to correspond to the upper edge of the pubic symphysis, which is located slightly inside the left and right sides from the body side, the measurement end (b),
A pair of left and right main measuring rods, which are bent rods (19a) and (19a) having (b) and are bent and extended inward at right angles to each other so as to be rotatable as shown by arrows. (19), (1
9) are respectively provided so as to project from each other, and it is generally the good idea to temporarily maintain the horizontal direction of each of these sub-measurement rods (19), (19). In order to ensure accuracy, for example, an index (21a) common to each of the sliding piece (17) surface and the connecting frame (18a) surface,
It is effective to engrave (21b) as a guide.

Further, as the inclination angle reading section (3), at least one end surface of the spindle shell (13) is provided with an angle scale (22) over a predetermined angular range and corresponds to this end surface. It is formed by projecting a pointer (23) on the pressing ring (12) on the side.

In the measuring device thus configured, as shown in FIG. 1, the connecting rod (14) is maintained in the vertical direction, and the pair of left and right main measuring rods (1
5), (15) and the pair of left and right auxiliary measuring rods (19), (19)
In the state where and are respectively maintained in the horizontal direction, the measuring end (a) corresponding to the tip through the bending rods (15a) and (15a) of the main measuring rods (15) and (15), respectively. , (A) connecting the horizontal straight line and the bending rods (19a) and (19a) of the sub-measuring rod (19), respectively, corresponding to the tips of the measuring ends (b) and (b). A straight line parallel to the straight line-occupies the same vertical plane as indicated by the straight line-and simultaneously occupies horizontal planes parallel to each other as indicated by the straight lines-and-. That is,
In other words, in this state, each main measuring rod (15), (15)
The measurement ends (a) and (a) of the above and the measurement ends (b) and (b) of the auxiliary measuring rods (19) and (19) are located on the same vertical plane at a predetermined horizontal interval.

Then, in the case of this configuration, as described above, a pair of left and right main measuring rods (15), (15) measuring ends (a),
(A) and the sub-measurement rod (19), the measuring end (b) of (19),
On the condition that (b) and (b) are maintained on the same vertical plane, the mutual intervals of the extension lines of the main measuring rods (15) and (15) on the spindle (11) can be visually or palpated. The right and left superior anterior iliac spine positions on the pelvis of the subject, which can be easily registered, can be easily adjusted and maintained by adjusting from the back side, and in the same way, the sub-measurement rod (19) on the connecting rod (14) is also provided. ), (19) can be adjusted to the upper edge position of the pubic bone joint on the pelvis of the subject so that the positioning can be easily maintained and, in this state, the main shaft shell (13) And the sub-measuring rods (19) and (19) are connected to each other via the sliding piece (17) and translated in parallel to each other, that is, in parallel with the main shaft (11). (18), and by extension, the connecting rod (14) can be rotated, and its rotation angle, that is, a pair of left and right main measuring rods (15), (15). On the angle scale (22) of the end face of the main shaft shell (13), the differential angle between each pair of left and right sub-measurement rods (19), (19) is indicated by the pointer (23) of the presser ring (12). It can be read easily.

This also means that a pair of left and right main measuring rods (1
5), (15) measuring ends (a), (a) directly on the pelvic region of the subject on the left and right superior anterior iliac spine positions in the horizontal direction from the dorsal side to the lateral outer side. ， While pressing it, rotate the sub-measuring rods (19), (19) so that the measuring end (b) is at the upper edge position of the pubic symphysis, and this is also the horizontal direction from the rear side to the side. If the angle pointed by the pointer (23) on the angle scale (22) is immovable when pressed directly through the outside, the pelvic tilt angle is in a normal form. If the pelvis tilts abnormally in the anterior direction and points to the backward tilted side, the pelvic tilt angle is detected as an abnormal condition in which the pelvis tilted backward, and the tilt angle of the pelvis can be easily detected from the back side of the human body as expected. This means that the degree of rotation can be judged at the same time.

Furthermore, in this embodiment, the bending rods (15a), (15) in each of the left and right main measuring rods (15), (15).
Measuring end (a) corresponding to the tip through a),
(A) In order to set the right and left superior anterior iliac spine positions on the pelvis of the subject in the horizontal direction directly from the rear side through the lateral side outward, Each main measuring rod (1
It is preferable to prepare a measuring stand (4) for holding 5) and (15) in the horizontal direction.

Here, the measurement stand (4) includes a measurement table (24) on which the subject is placed in a standing posture, and a measurement table (2).
4) A pair of left and right support frames (25), (25) which are planted at a predetermined left and right spacing are provided on the above, and each of these support frames (25),
(25) includes a sliding rotation piece (26) whose axial height and rotation angle can be arbitrarily adjusted to match the height and width of the pelvis of the subject. ), (26)
And loosen each, and adjust its height,
In addition, the rotation position can be held by the push screws (26a) and (26a), and the sliding rotation pieces (2
Support rods (27), which are extended from 6) and (26), respectively.
Attach the receiving pieces (28), (28) to the tip of (27)
For each of these receiving pieces (28), (28), a pair of left and right retaining gutters (29), (29) for horizontally retaining the above-mentioned pair of left and right main measuring rods (15), (15). Is rotatably supported in a horizontal direction.

According to this measuring stand (4), a pair of left and right sliding pivot pieces (2) are set according to the body shape of the subject in the standing posture.
By adjusting and setting the vertical height and rotation angle in 6) and (26), a pair of left and right retaining gutters (29), with respect to the height position and width position of the pelvis, (29) can be set in the horizontal direction, and a pair of left and right main measuring rods (15), (15) in the above-mentioned measuring device are used, and each holding gutter (29) thus set in position. , (29), it is extremely easy to hold the position in the horizontal direction.

Next, the method of measuring the pelvic inclination in the measuring apparatus of this embodiment configured as described above will be described with reference to FIGS. 5 and 6.

FIGS. 5 and 6 schematically show the measurement state of the pelvic inclination angle in each of the different examples in the standing posture of the human body to which this embodiment is applied, with the measurement states interchanged as in the case of performing from the entire surface side. In each of these drawings, the former FIG. 5 shows the case of the pelvis inclination angle according to the normal form, and the latter FIG. 6 shows the case of the pelvis inclination angle due to the anterior convoluted form.

First, as shown in FIG. 5, when the pelvis inclination angle is normal, this pelvis inclination angle is, as described above, the tip A of the promontory angle and the pubic symphysis on the pelvis of the subject. It can be expressed as an angle ∠ABC = 60 degrees formed by an extension end C horizontally drawn from the pubic symphysis upper edge B with respect to a straight line AB connecting the upper edge B, and at this time, the superior anterior iliac spine D The extension line of the straight line DB connecting the pubic bone upper edge B with the pubic bone is a horizontal line EF parallel to the straight line BC.
If the shape intersects with the right angle, it can be regarded as the pelvic position according to the normal shape.

Therefore, the measurement of the pelvis inclination angle in the state of the pelvis in FIG. 5 is performed by bending the bending rod (15) of the main measuring rod (15).
The measurement end (a) corresponding to the tip via a) is used, and it is directly pressed against the superior anterior iliac spine D position in the pelvis in the horizontal direction from the rear side through the lateral side outward, and the secondary measurement Make a measuring end (b) corresponding to the tip through the bending rod (19a) of the rod (19), and place it at the upper edge B position of the pubic symphysis in the pelvis, also from the rear side in the horizontal direction. The state of the pelvis in the case of FIG. 5 is the normal morphology, as described above, although it is directly pressed through the outside of the lateral side. Since the extension line of the straight line DB that connects the pubic bone upper edge B intersects the horizontal line EF at a right angle, the sub-measurement rod (19) with respect to the main shaft (11) holding the main measurement rod (15). Auxiliary shaft (18) for holding, and by extension, connecting rod (14)
Is not rotated at all, and the central point H of the main axis (11) and the superior anterior iliac spine D, and the central point I of the accessory axis (18) and the pubic symphysis upper edge B form a right-angled quadrilateral HDBI. And for this,
The pointer (23) points to "0" on the angle scale (22), and the pelvic tilt angle at this time is measured as being normal 60 degrees.

Further, as shown in FIG. 6, when the pelvic tilt angle is rotated forward, the measurement of the pelvic tilt angle is as follows.
Also here, the measuring end (a) of the main measuring rod (15) is directly pressed to the superior anterior iliac spine D position in the horizontal direction from the rear side through the lateral side outward, and the sub-measuring rod (19 ) Measuring end (b)
Is directly pressed against the pubic symphysis upper edge B position in the horizontal direction from the rear side to the outside of the side, but as described above, the state of the pelvis in FIG. When the perpendicular line DG is drawn from the superior anterior iliac spine D on the extension line of the straight line BC described above, the angle ∠BDG is generated in the superior anterior iliac spine D. As described above, the main measuring rod (15) fitted to the superior anterior iliac spine D position is apparently displaced from the main measuring rod (19) fitted to the upper pubic joint upper edge B position by shifting forward. By being moved, the auxiliary measuring rod (19) is held against the main shaft (11) holding the main measuring rod (15).
The auxiliary shaft (18) for holding, and by extension, the connecting rod (14) is rotated counterclockwise to generate a differential between the main measuring rod (15) and the sub measuring rod (19), In this case, the spindle (1
The central point H of 1) and the superior anterior iliac spine D, and the central point I of the accessory axis (18) and the pubic symphysis upper edge B each form a parallelogram HDBI. When a perpendicular line HJ is drawn on the extension of the straight line BC from the center point H of), the angle ∠IHJ which is similar to the angle ∠BDG of the superior anterior iliac spine D at this center point H.
Occurs, the pointer (23) moves on the angle scale (22) and the angle ∠IH
J, In this case, it refers to "20", and the pelvic tilt angle at this time is measured as being rotated anteriorly by about 20 degrees from the normal 60 degrees.

In addition, in the above-mentioned embodiment, only the average case where the pelvic tilt angle is rotated forward is described, but even when the pelvic tilt angle is rotated backward, it can be measured by the same action. Of course.

[Effects of the Invention] As described in detail above, according to the present invention, in the device for measuring the inclination angle of the pelvis from the back side of the human body, at least one of the front side of the pelvis and the superior anterior intestine The main measuring rod is directly abutted against the osteophyte in the horizontal direction from the back side through the lateral side outward, and similarly, the main measuring rod is moved in parallel with the upper pubic joint edge on the front side. Measuring rod,
After directly abutting from the back side through the outside of the side in the horizontal direction, the vertical differential angle of these main and auxiliary measuring rods is detected, and this differential angle is used as expected. Moreover, the tilt angle of the pelvis can be easily measured from the back side of the human body.

In addition, the main shaft shell is pivotally supported only in the middle part of the main shaft, and the connecting rod is hung downward from the main shaft shell, and it is attached to both ends of the main shaft to correspond to the left and right superior iliac spine positions. With the spacing adjustable, it is extended horizontally with the same length,
In addition, a pair of left and right main measuring rods, each having a measuring end that directly abuts from the dorsal side to the outside of the side to the anterior superior iliac spine at the tip, is connected to the main detecting part. The rod is adjustable up and down according to the position of the upper edge of the pubic symphysis, and a sub-axis parallel to the main axis is provided, and on this sub-axis, the same horizontal length as the main measuring rod is provided. And a pair of left and right sub-measuring rods, each of which has a measuring end that abuts directly to the upper edge of the pubic symphysis at the tip from the back side through the outside of the side, , These Lord,
Since it is configured with an inclination angle reading unit that reads the relative angle between the sub detection units as the pelvic inclination angle, the connecting rod is maintained in the vertical direction, and the left and right sides of the main detection unit are maintained. Provided that one set of main measurement rods and one set of left and right sub measurement rods in the sub-detection unit are maintained on the same vertical plane, one set of left and right main measurement rods and sub measurement rods are provided for each of these. While keeping and in the horizontal direction, the measuring ends of the main measuring rods are directly abutted from the back side to the outside of the side to the superior and anterior iliac spine positions on the left and right sides. Rotate each sub-measurement rod around the axis and operate this sub-measurement rod so that it directly abuts on the pubic symphysis upper edge position, also from this side through the outside of the side. Thus, the differential angle of each sub-measurement rod with respect to each main measurement rod, that is, the angle corresponding to the amount of rotation of the sub-measurement rod, In this case, the pelvic tilt angle can be measured very easily from the back side only by reading the relative differential angle between the main and sub detecting parts with the tilt angle reading part. Therefore, it is possible to easily and accurately determine the normal and abnormal pelvic position and the degree thereof, and
Since this measurement operation can be performed from the back side of the human body of the subject, there is no fear of giving a dislike or shame to the subject, and the standing posture can be held correctly, which is even more accurate. It has an excellent feature that it enables various pelvic tilt angles to be measured, is structurally relatively simple, and can be provided easily and inexpensively.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of a pelvic inclination measuring apparatus according to the present invention, and FIGS. 2 to 4 are the same as FIG. 1 II-II line section, III-III line section, FIG. 5 is an enlarged cross-sectional view showing the IV-IV line portion, and FIGS. 5 and 6 are a normal form in a standing posture of a human body and a form of forward rotation according to this embodiment. FIG. 4 is an explanatory diagram schematically showing the measurement state of the pelvic inclination angle by the method as swapped as in the case of performing from the front side. (1) …… Main detection unit, (2) …… Sub detection unit, (3) ……
Inclination reading unit, (4) …… Measuring stand. (11) …… Spindle, (12) …… Holder ring, (13) …… Spindle shell, (14) …… Connecting rod, (15) …… Main measuring rod, (15a)
…… Bending rod, (16), (17) …… Sliding piece, (18) ……
Sub-axis, (18a) …… Connection frame, (19) …… Sub-measurement rod, (19
a) …… Bending rod, (20) …… Sliding piece, (21a), (21
b) ... index, (22) ... angle scale, (23) ... pointer,
(24) …… Measuring stand, (25) …… Support frame, (26) …… Sliding pivot piece, (27) …… Support rod, (28) …… Receiving piece, (29)…
... holding gutter. (A) ... Measurement end via the bending rod of the main measuring rod, (b)
...... Measurement end via the bending rod of the sub-measurement rod. A: Tip of cape angle, B: Upper edge of pubic symphysis, D: Superior anterior iliac spine.

Claims (3)

(57) [Claims] 1. A device for measuring a tilt angle of a pelvis from the back side of a human body, which is horizontal to at least one of the right and left superior anterior iliac spines on the front side of the pelvis. The main measuring rod that abuts from the side through the outside of the side, and the main measuring rod is moved in parallel with the main measuring rod. A pelvic tilt angle measuring device, characterized in that a sub-measurement rod to be abutted against is provided, and a vertical differential angle between these main and sub-measurement rods can be detected as a pelvic tilt angle. 2. A device for measuring a tilt angle of a pelvis from the back side of a human body, wherein a main shaft shell is rotatably supported by an intermediate portion of the main shaft, and a connecting rod is downwardly connected from the main shaft shell. Along with hanging down, both ends of the same main axis can be adjusted in spacing corresponding to the left and right superior anterior iliac spine positions, with the tips being extended horizontally in the same length and mutually inwardly bent, A pair of left and right main measuring rods, each of which has a measuring end for abutting the anterior superior iliac spine from the front side, is provided on the rear side, and the pubic joint upper edge position on the connecting rod. Is provided vertically adjustable in correspondence with the main axis, and a sub-axis parallel to the main axis is provided, and on the sub-axis, the main measuring rod is extended in the same horizontal direction with the same length and mutually. Left with inwardly bent tip, measuring end for abutting the pubic symphysis upper edge from the front side The relative differential angle between the sub-detection unit on the back side where a pair of sub-measurement rods is projected and the main and sub-measurement rods of the main and sub-detection units is defined as the pelvic tilt angle. And a pelvic tilt angle measuring device. 3. The pelvic tilt angle measuring device according to claim 2, further comprising a measuring stand for supporting the pair of left and right main measuring rods whose distances are adjusted in a horizontal state.