JPH01288258A - Massage machine - Google Patents

Abstract

PURPOSE:To easily execute a patting massage in a condition in which the interval of a remedying piece is made into a prescribed value by providing a control means to operate a rotation driving means based on the output of a detecting means and to set the rotation position of an inner ring to a prescribed position. CONSTITUTION:A rotary shaft 12 is formed of crank shafts 12a and 12b made eccentric in a direction reverse to each other, the positions of both remedying pieces 5 and 5 are dislocated by the rotation position of the rotary shaft 12, the rotation position of the rotary shaft 12 is detected by a separate detecting means, the position of a ball joint 44 to link a linking link 8 and an arm 4 is controlled so that it can be made into the same position as the both remedying pieces 5 and 5, and thereafter, a massaging massage is executed. When a switch SW33 of 'patting' is pushed, by rotating a main shaft 1, a set action to a condition, in which the projecting quantity of the remedying piece 5 due to the eccentricity of the inner ring 2 is made maximum and, simultaneously, the interval between a pair of remedying pieces 5 and 5 by the inclination of the inner ring 2 is made maximum, is executed, the rotation driving of the rotary shaft 12 is executed, and the patting massage is executed.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a pine massage machine that allows a treatment element attached to the outer ring via a 7-arm to perform a tapping action by reciprocating the outer ring within a predetermined angular range with respect to the inner ring.

[Conventional technology]

A pine massage machine is known from US Pat. No. 3,633,571 #II, which uses a pair of ring-shaped elements as treatment elements that are attached at intervals to a rotationally driven main shaft. The above-mentioned treatment element, which is attached eccentrically and inclined with respect to the main axis, performs a pine surge operation by rotation of the main axis.However, with such a shape of the treatment element, the amount of protrusion of the treatment element from the main axis is limited. , it is determined only by the outer diameter and eccentricity of the massager, and as the outer diameter is increased, the curvature of the outer surface of the massager becomes smaller and the contact area with the body becomes larger, so the so-called point of suppressing the "point" is There is a problem that pine surge cannot be obtained, and even if the amount of eccentricity is increased, this is still the same because it is limited by the outer diameter. Therefore, when trying to perform pine surgery on the sides of the neck or shoulders using a treatment element whose outer diameter is set to a point pine surge, the main shaft hits the back of the neck, making it impossible to obtain sufficient pine surgery. Here, in Japanese Utility Model Publication No. 55-30488, an outer ring is freely rotatably attached to a pair of inner rings that are attached to the main shaft eccentrically in the same direction and inclined in opposite directions, and the base end is A device has been disclosed in which a pair of arms supported by a universal joint are connected at their midpoints to each outer ring, and treatment elements are provided at the tips of these arms. In this pine surge machine, in which the free rotation range of the outer ring relative to the inner ring is regulated via the arm and the universal joint, when the main shaft is rotationally driven, the pine surge motion that the outer ring gives to the user in the conventional example is The treatment element at the tip of the arm performs almost the same action as the above, and since there is no separate limit on the length of the 7-arm, it is possible to satisfy both point pine surge and shoulder pine surge. It is structured so that it can be used. Moreover, what is shown here is
Since the base end of the arm is connected via a universal joint to a rocking plate that is driven to swing, when the rocking plate is rocked, it is possible to cause the treatment element to perform an action similar to a tapping pine surge. This makes it an excellent pine surge machine.

[Problem to be solved by the invention]

However, when considering the pounding pine surge as a main body, the fact that the pair of inner rings are inclined with respect to the main shaft causes the following problems. In other words, when performing a tatami massage, the distance between the pair of treatment elements in the tatami massage differs depending on the rotation stop position of the inner ring that is inclined with respect to the main axis. Therefore, it is not possible to reliably hit the ``brittle'' called ``R'', which is located at both ends of the shoulder and is effective for stiff shoulders, and the width W41!18 is provided separately so that the distance between the pair of treatment elements can be adjusted. Unless a mechanism is provided and the adjustment mechanism is operated, it is not possible to obtain good tapping pine surge. The present invention has been made in view of these points, and its purpose is to enable the use of massagers capable of performing point pine surgery to also perform tapping pine surgery, so that the intervals between the treatment members are set at a predetermined distance. To provide a pine surge machine capable of easily obtaining a pounded pine surge with a value of . [Means for Solving the Problem] The present invention provides an inner ring that is attached to the main shaft at an angle, an outer ring that is rotatably attached to the outer periphery of the inner ring, and an outer ring that is attached to the outer ring via an arm. a treatment element provided on the arm, a swinging drive means for reciprocating an outer ring within a predetermined angular range around the inner ring to perform a tapping action on a treatment element provided on the arm, and a rotational drive means for rotating a main shaft; and a detection means for detecting the rotational position of the inner ring, and when operating the swing drive means, the rotation drive means is actuated based on the output of the detection means! The present invention is characterized in that it includes a control means for setting the rotational position of the inner ring to a predetermined position by rotating the inner ring.

[Effect 1] According to the present invention, when performing the tapping pine surge, the rotational position of the inner ring that is inclined with respect to the main axis is automatically set to a predetermined position, so that the spacing between the treatment elements in the tapping pine surge is constant. It is something that [Example J] The present invention will be described in detail below based on the illustrated embodiment. This pine surge machine is built into the backrest of a chair or into the bed, and in the illustrated example, as shown in FIG. 5, it is built into the backrest of a chair which can be reclined freely. This chair is provided with a seat part 82 and an armrest 83 on a lower frame 81 made of pipes, a lower part of a frame 85 of a backrest 84 is pivotally connected to the lower frame 81, and a bushing is provided between the lower end of 7 frames 85 and the lower frame 81. By attaching the spring 86 and lever 87 provided on the armrest 83@ surface.
The backrest 84 can be reclined by the expansion and contraction of springs 86, and a pair of rails 90 and 90 each having a 7-shaped cross section and facing opening surfaces are fixed to seven frames 85 on both sides of the backrest 84. Also the backrest 84
A headrest 88 is provided at the upper end, and a backrest 84
Support bands 89 are disposed vertically on both sides of the back of the cover sheet, which is provided up to the headrest 88 on the front of the vehicle. A rack 9 is provided at each opening edge of the pair of rails 90 and 90.
1.91 is fixed along the longitudinal direction, and a pine surge machine is installed between both rails 90.90, which is equipped with rollers 18 that move within this rail 90 and a pinion 17 that meshes with a link 91. . As shown in Fig. 1, the pine surge machine is equipped with a motor block 20 at one end and a reducer block 19 at the other end, and the rollers 18 and the pinion 17 which are driven to rotate are protruded from both blocks 20 and 19. Both blocks are 20.
A main shaft 1 and an auxiliary shaft 13 are installed between the shafts 19 and 19. The auxiliary shaft 13, whose both ends are supported by both blocks 20.19, is connected to the main shaft 1 and the auxiliary #113 via a pair of rotating plates 15.15 that are rotatable with respect to the auxiliary shaft 13. A parallel rotating shaft 12 is attached so that the rotating shaft 12 can freely rotate around an auxiliary shaft 13. Note that the rotating shaft 12, whose both ends are supported by a pair of rotating plates is and is, is rotatable with respect to the rotating plate 15. The motor housed in the motor block 20 not only rotates the main shaft 1 , the rotating shaft 12 , and the pinion 17 , but also drives the rotating shaft 12 around the auxiliary shaft 13 . That is, the driven shaft 31 disposed on the outer surface of the reducer block 19 is connected to the belt 29 and the pulley 30 on the boo 928 attached to the output shaft of the motor protruding downward from the motor block 20.
The driven shaft 31 and the reduction gear 8!1 structure in the reduction gear block 19 are connected via the clutch 33.
and are connected by boos 1734, 36 and belt 35. Deceleration mechanism section in Meuniso block 19 (not shown)
is composed of a reduction unit and multiple clutch units,
When the clutch 33 is connected, the motor output is selectively transmitted to the main shaft 1 or the pinion 17. A worm wheel 41 attached to the auxiliary shaft 13 is connected to the driven shaft 31 via a clutch 32, a pulley 37, a belt 38, a boot 1J39, and a worm 40. 42 meshes with a gear 43 fixed to the rotating shaft 12. When the clutch 32 is connected, the motor output is transmitted to the rotating shaft 1 through the above-mentioned members.
2, and the rotating shaft 12 rotates about that axis. Historically, the outer surface of the motor block 20 is provided with boots 1, 121, .
23, a feed screw 25 connected to the motor via a belt 22 and a clutch 24, a feed nut 26 screwed onto the feed screw 25, and a pair of rotary plates 1
5.15 are connected by a link 1G. When the feed screw 25 rotates with the motor output, the feed nut 26, which moves in the axial direction of the feed screw 25,
6 to move the rotary plate 15, and as a result,
The rotating shaft 12 supported by the rotating plate 15 is auxiliary.
A pair of inner rings 2, 2 are attached to the main shaft 1 with a gap between them. Both inner rings 2, 2 are eccentric by the same amount in the same direction with respect to the main shaft 1, and are inclined in opposite directions. By engaging with a protrusion 11 formed on the main shaft 1, the main shaft 1 is configured to rotate together with the main shaft 1 and to be able to slide freely in the axial direction of the main shaft 1, and outer rings 3 and 3 are provided on the outer peripheral surface of the main shaft 1, respectively. 3
is attached so that it can rotate freely. Further, one end of each connecting arm 6.6 protruding from each housing of the reducer block 19 and the motor block 20 is freely rotatably connected to the outer peripheral surface of the non-eccentric portion of each inner ring 2,2. The middle portions of arms 4, 4 are fixed to each of the outer rings 3.3. A roller-shaped treatment element 5 that is freely rotatable with respect to the arm 4 is attached to the bent portion at the tip of each arm 4, and the other end of each arm 4 has a connecting link 8 and a bearing 70. They are respectively connected to the rotating shaft 12 via the rotating shafts 12 . The rotating shaft 12 here is formed such that eccentric directions are connected to each other in the axial direction, and non-eccentric ff
1S12d and 12e are supported by a rotating plate 15, one end of one connecting link 8 is connected to a crankshaft 12a, and one end of the other connecting link 8 is connected to a crankshaft 12b via a bearing 70, respectively. In the figure, reference numeral 9 denotes a connecting plate that connects the non-eccentric portion 12c of the center shaft of the rotating shaft 12 and the center of the auxiliary shaft 13 to prevent the rotating shaft 12 from deflecting. The bearing 70, which is slidable in the axial direction of the rotating shaft 12, is formed as a sphere, as is clear from FIG. By fitting together, three-dimensional rotation is possible with respect to the bearing 70, and the connecting portion between the other end of the connecting link 8 and the arm 4 is also formed as a ball joint 44, so that it can rotate in three dimensions as well. The target can be rotated freely. Next, the operation will be explained. When the main shaft 1 is rotated by a motor, the inner ring 2 that rotates together with the main shaft 1 is eccentric and inclined with respect to the main shaft 1. 4, the rotation range of the outer ring 3 around the inner ring 2 is restricted by the connection link 8, and as the main shaft 1 rotates, the treatment element 5 rotates as shown in FIGS. To figure 3! A movement that draws a three-dimensional trajectory as shown in , that is, a movement that changes the position in the vertical direction, the axial direction of the main shaft 1, and the direction of protrusion from the main shaft 1 is performed. Incidentally, FIG. 3 shows the locus l when the treatment element 5 is viewed from the front. The pair of treatment elements 5.5, which perform such movements symmetrically, give a so-called "nerimomi" massage to the back of the user. The connecting link 8 connected to the arm 4 via the ball joint 44 swings vertically and horizontally as the inner ring 2 rotates, but the connecting link 8 and the rotating shaft 12 are connected to the ball joint. Since the treatment element 5 is connected by a bearing 70 which is a spherical body, the operation of the treatment element 5 is performed smoothly. When the rotating shaft 12 is rotated around the auxiliary shaft 13 via the link 16 and the rotating plate 15 by rotating the feed screw 25 by the motor, the arm 4 and the outer ring 3 are rotated around the inner ring 2. The treatment element 5 rotates around the body and changes the amount of protrusion toward the front where the user's back is located, and for this reason, increasing the amount of protrusion produces a strong "neri massage" pine surge. By reducing the amount of protrusion, it is possible to obtain a weak pine surge. When the rotating shaft 12 is rotated instead of the main shaft 1, the pair of crankshafts 12a of the rotating shaft 12. 12& moves the arm 4 via the connecting link 8, and since the movement of the arm 4 at this time is a reciprocating movement together with the outer ring 3 around the stationary inner ring 2, the tip of the arm 4 As will be described later, depending on the position of the inner ring 2, the treatment element 4 makes a linear reciprocating motion in the vertical direction when viewed from the front, and performs tapping and pine surgery. In addition, the strength can be adjusted by rotating the feed screw 25.
This can also be obtained during Tatasa Pine Surge. When the pinion 17 is rotated by the motor, this pine surge machine moves the backrest 84 of the chair up and down along the rail 90 due to the engagement between the rack 91 and the pinion 17. Therefore, the position of the treatment element 5 can be changed up or down. Here, the rotating shaft 12, which is the crankshafts 12a and 12b, the bearing 70, the connecting link 8, and the ball joint 4
In order to cause the treatment element 5 to perform the tapping operation by the swinging drive means constituted by 4, the apparatus is provided as being inclined with respect to the main shaft 1 in order to enable the treatment element 5 to perform a pine surge of kneading. If the rotational position of the inner ring 2, that is, the inclination direction of the inner ring 2, is not constant, the interval and operating direction of the pair of treatment elements 5, 5 will change as described above. For this purpose, in this pine serge machine, as shown in FIG.
A rotational position detection sensor Sl that can detect the rotational position of the inner ring 2 is provided. Next, the operating device 60 that instructs the treatment element 5 to perform an operation will be described. The operating device 60 is detachable from the armrest of the chair and is connected to the main body control section M1 installed in the chair and the power circuit.
As shown in Fig. 6, there is a 3-position mode switch SW2 for F storage JJ operation J bottom stop J, and "rolling", "kneading", "kneading down", "pounding", "pounding rolling". A switch SW that is a push-on type for selecting various pine surges and is a selection-selection type in operation.
Switch SW1, treatment element 5, consisting of 3゜~SW, .
Switches sw,, s for changing the position from top to bottom
w, and the main axis 1 of the arm 4 due to the rotation of the rotating plate 15.
A switch sw for adjusting the protrusion of the treatment element 5 toward the cover sheet side (7-m protrusion amount) by adjusting the surrounding angle.
,,sw, and a light emitting element L for operation display.
l*LztLso-L3s and buzzer Bz. The light emitting element drive circuit A shown in FIG. 7, the signal forming circuit B that creates a pulse code signal according to the operation of each of the switches 5W2-SW, and sends it to the main body control section, and the sent pulse code Signal discrimination circuit B that discriminates signals
The control circuit CPU1 is provided with a control circuit CPU1 consisting of 2. Of the various pine surges selected by the switch SW, "rolling" is performed by moving the pine surge machine up and down along the backrest of the chair without rotating the main shaft 1 and the rotating shaft 12, so that the treatment element 5 moves along the backrest. 84 indicates that the back of a human body is rubbed and served, and "sideburns" and "sideburns" are obtained by rotating the main shaft 1 in which direction the spindle 1 is rotated. The main body control section is a control circuit CPU of the operating device 60. A signal discrimination circuit C2 that discriminates signals sent from the controller, a signal forming circuit C5 that sends signals to the controller 60, and a timer circuit C.
It is equipped with a control circuit CPU2 consisting of an operation instruction circuit C8, etc., a motor drive circuit I that drives a motor M according to the output of the operation instruction circuit C1, a solenoid drive circuit H for controlling each clutch, and a main shaft 1 (not shown), the rotational position detection circuit (sensor) S for detecting the rotational position of the inner ring 2, and a treatment element by driving the feed screw 25. It is constituted by an arm protrusion amount detection circuit 82 and the like that detects the protrusion of the arm. Now, to briefly explain various operations performed in response to inputs to the operating device 60, the power switch SW (not shown) is turned on, and the mode switch SW2 is changed from "storage" or "stop" to "operation". When switched to , the massager 5 starts massaging at that position. To change this kneading position, all you have to do is rub the switches sw, , SWs. While the input from each switch sw, , sws continues, the massager element 5 moves in the specified direction, and resumes massaging operation when the hands are removed from the switches sw, , sw. When the switches sw, , sw are operated repeatedly, the above-mentioned strength adjustment action is executed by interruption. In addition, as mentioned above, since the rotating shaft 12 is formed by cranks 12a and 12b that are eccentric in opposite directions,
Depending on the rotational position of the rotational shaft 12, the positions of the two treatment elements 5, 5 may shift, but this can be fixed by detecting the rotational position of the rotational shaft 12 with a separate detection means, as shown in FIG. After controlling the position of the ball joint 44 connecting the link 8 and the arm 4 so that both the treatment elements 5, 5 are in the same position, that is, so that both the treatment elements 5f5 are in the same position, The above fir pine surge is done. "Rolling" switch SW. If you manipulate the
First, check whether the protrusion due to the feed screw 25 is small, that is, whether it is set at the weak position, and check whether the width of both treatment elements 5, 5 is within a predetermined width. are performed sequentially, and if these conditions are not met, the protrusion margin adjustment and width adjustment are performed. Next, after the rotational position of the main shaft 1 is controlled using the rotational position detection circuit S1 so that the amount of protrusion of the treatment element 5 due to the eccentricity of the inner ring 2 is maximized, the rotational position of the main shaft 1 is controlled by rotating the pinion 17. The treatment element 5 is moved up and down. A rolling massage is performed in which the treatment element 5 rubs the user's back while rolling. At this time, when the treatment element 5 reaches the upper and lower ends of the vertical movement range, the vertical movement direction is automatically reversed by controlling the rotational direction of the motor M. Also, while the muff surge is being performed by this switch SW3°,
Switch sw1. When sw is repeatedly operated, the operations by these switches SW4-SWs are executed in an interrupt manner, and manual reversal is performed. Switch SW 6, S
When Wy is operated, interrupts are not allowed and the motor stops. “Sideburns” or “sideburns” switch 5W31
When the tSW 32 is pressed, the treatment element 5 starts the pine surge of raising or lowering the sideburns by rotating the main shaft 1 at that position. Switch SW during this pine surge
, ~SW are operated, these operations are executed in an interrupt manner, and vertical position adjustment and strength adjustment are performed. When the "tapping" switch S W 3 ff is pressed, by rotating the main shaft 1, the amount of protrusion of the treatment elements 5 due to the eccentricity of the inner ring 2 is maximized, and the pair of treatment elements 5 due to the inclination of the inner ring 2 is , 5 is set to the maximum interval, and then the rotary shaft 12 is driven to rotate, thereby executing the above-mentioned beating 77 sash. Inner ring 2
During the fir pine surge in which the eccentric direction and the inclination direction of the main shaft 1 are gradually changing, the switch SW,
When is pressed, the control circuit CPU monitors the output of the rotational position detection circuit S1 and detects a state in which the pair of inner rings 2, 2, which are inclined in opposite directions, are opened toward the front side of the backrest 84. and the eccentric direction of the inner ring 2 is the backrest 8
The rotation of the main shaft 1, which is a rotational driving means, is continued until the main shaft 1 faces the front side of the main shaft 4, and then the rotation of the motor, which has been transmitted to the main shaft 1 until then, is controlled so that it is transmitted to the rotating shaft 12. Circuit CPU2 switches each clutch. Incidentally, in the tapping pine surge here, since the eccentric directions of both crankshafts 12a and 12b in the rotating shaft 12 are opposite, the tapping operation by both treatment elements 5.5 is performed alternately. Furthermore, when the "tapping rolling" switch S W 3- is pressed, first, the operation of minimizing the protrusion of the treatment element 5 set by the feed screw 25 and the movement of the pair of treatment elements due to the inclination of the inner ring 2 are performed. 5, 5 is set to the minimum and the amount of protrusion of the treatment element 5 due to the eccentricity of the inner ring 2 is set to the minimum, and after tightening, the tapping operation is performed by rotating the rotating shaft 12 and the pinion 17 is rotated. The vertical movement is performed at the same time. When the treatment element 5 reaches the upper and lower ends, the direction of movement is automatically reversed, as in the case of rolling muff circ. FIG. 8 shows a 70-chart of the operation when shifting from kneading pine surge to pounding pine surge or pounding rolling pine surge. Here, the reason why the spacing between the treatment elements 5 due to the inclination of the inner ring 2 is made larger during the tapping pine surge, and the interval between the treatment elements 5 is made smaller during the tapping rolling pine surgery is because the tapping pine surge is a pine surge against the shoulder. Therefore, the ``Bba'', which is called ``Ri'', at both ends of the eyebrows are struck to make it look like a pine surge.
This is because the tataki rolling pine surge, which performs pine surge along the spine, stimulates the ``spits'' that are lined up on both sides of the spine. In addition, a single motor is used to move up and down and tap, and when moving upwards and downwards,
Although the rotational direction of the motor is reversed, there is no problem because the tapping operation is the same regardless of the rotational direction of the motor, that is, the rotational direction of the rotating shaft 12. When the mode switch SW2 is set to "stop", all operations are stopped at that point. When set to "storage", the operation of minimizing the protrusion by the feed screw 25, the operation of moving the treatment element 5 to the lower end, and the operation of minimizing the amount of protrusion due to the eccentricity of the inner ring 2 are performed in sequence. , all operations stop. The timer circuit C4 in the control circuit CPU2 starts counting up when the mode switch SW2 is set to "operation", and when a predetermined time has elapsed, performs the same operation as when the mode switch SW2 is set to "storage". let FIG. 9 shows the clutch 24,
32.33 and the current waveform flowing through the clutches 24 and 32.33 are shown. At the initial stage of suction, when a large suction force is required, continuous energization is performed for one hour, and since a small suction force is required to maintain the operating state thereafter, the energization for a short time t1 is changed to the required time t2.
By performing this at intervals and setting the current application time to t+/(t++tz), the average value of the applied voltage is lowered to save power and prevent temperature rise. Further, FIGS. 10(a) and 10(b) show a buzzer Bz and a light emitting element provided on the operating device 60. Which drive circuit and the voltage change at point a in the figure are shown. The light emitting element Lis here can be controlled in strength by moving the feed nut 26 by operating the switches S W s - S W t. 4
The buzzer Bz lights up when the switch sw6. sw,
The strength can be adjusted by repeating the , or the strength can be adjusted in conjunction with other pine surge movements! It sounds when the adjustment is made and the direction of aa is the strong direction to alert the user.Here, the buzzer Bz and the light emitting element L3. By connecting them in parallel, the output terminals for both of the control circuits CPU can be shared, and the number of output terminals of the control circuit CPU1 can be reduced. The four combinations of the sounding state of the buzzer Bz and the sounding state of the buzzer Bz are a continuous on or off state of the transistor Q in the light emitting element drive circuit A, and two types of intermittent states with different ratios of the on time t and the off time t4. It is obtained by the target on/off state.h/(ts+
By increasing the ratio of t4) and at the same time decreasing the intermittent period t4, the light emitting element ratio when the buzzer Bz sounds is reduced to 1. The repetition of turning on and off the light is hardly visually perceptible, and the light is perceived as being continuously on or off. Effects of the Invention As described above, in the present invention, when performing Tataki Pine Surge, the direction of inclination of the inner ring that is inclined with respect to the main axis is constant, and for this reason, the interval between the treatment elements is Since the direction of movement and motion is always the same, it is said that the tatami massage using a massager is effective for treating stiff shoulders.
This is something that can be made to do this with certainty.

[Brief explanation of the drawing]

Fig. 11 is a perspective view of one embodiment of the present invention, Fig. 2 is a broken plan view of the same, Fig. 3 is an explanatory diagram showing the locus of kneading motion of the massager seen from the front, and Fig. 4 is a broken side view of the same. Figure 5 is a perspective view of the chair equipped with the same as above, Figure 6 is a front view of the same controller, Figure 7 is the block circuit diagram of the same as the above, and WIJ8 is the 70-chart at the start of the same as the tapping mafusano. , Figure 9 is a time chart of voltage and current waveforms for clutch control, Figure 10 is a time chart of voltage and current waveforms for clutch control.
Figures (a) and (b) are partial circuit diagrams and time charts similar to the above, in which 1 is the main shaft, 2 is the inner ring, 3 is the outer ring, 4 is the arm, 5 is the treatment element, and S is the detection means. Agent Patent Attorney Ishi 1) Ai 7 Figure 5 Figure 6 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] (1) An inner ring attached to the main shaft at an angle, an outer ring rotatably attached to the outer circumference of the inner ring, a treatment element attached to the outer ring via an arm, and a predetermined outer ring around the inner ring. It includes a swinging drive means for reciprocating within an angular range to perform a tapping motion on a treatment element provided on the arm, a rotational drive means for rotating a main shaft, and a detection means for detecting the rotational position of the inner ring. A pine surge machine comprising: a control means for operating the rotary drive means based on the output of the detection means to set the rotational position of the inner ring at a predetermined position when operating the swing drive means.