JPH0131903B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a pine massage machine, in particular a planetary mechanism disposed between a drive source and a treatment element, and applying braking to one of the two outputs taken out from the planetary mechanism. The present invention relates to an output switching device for a pine massage machine configured to transmit the other output to a treatment element.

[Background Art] The output switching device of the pine massage machine using the planetary mechanism as described above can selectively operate the treatment element and move the treatment element up and down along the back of the human body, for example. It has favorable conditions for use in home-use pine surge machines because it can transmit large torque, is compact and has a large reduction ratio, and does not generate noise when switching. ing.
However, the planetary mechanism alone cannot switch the power, and only by applying braking to one of the two outputs available from the planetary mechanism can the other output be transmitted to the treatment element, so a braking mechanism is essential. It is becoming. However, in the case of a pine surge machine that moves the treatment element up and down, there is a condition that this braking mechanism must be able to exert braking force in both rotational directions, so conventionally, a solenoid was used as the braking mechanism. A friction brake was used, but this friction brake could only control a small amount of torque, and in order to control a large torque, it would have to be large, including the solenoid, and it would have to be installed separately for each output of the planetary mechanism. Because it was indispensable, the advantages of using a planetary mechanism were offset.

[Object of the Invention] The present invention has been made in view of the above points, and its object is to provide an output switching device for a pine serge machine that is compact and capable of controlling bidirectional rotation with large torque. .

[Disclosure of the Invention] Accordingly, the present invention disposes a planetary mechanism between a drive source and a treatment element, applies braking to one of two outputs taken out from the planetary mechanism, and transmits the other output to the treatment element. a cylindrical fixed hub; a pair of movable hubs each connected to each output of the planetary mechanism and disposed on both sides of the fixed hub in the axial direction;
two pairs of braking coil springs disposed on the inner and outer peripheries of the fixed hub and each movable hub, each of which performs braking in different directions;
Consists of an outer collar placed on the outer periphery of each coil spring located on the outer periphery, and an inner collar placed on the inner periphery of each coil spring located on the inner periphery, and control for rotating the outer and inner collars. It is characterized by a braking mechanism that brakes one movable hub using a coil spring driven by an input, and a single reversible braking input can brake any output of the planetary mechanism against bidirectional rotation. It uses a braking mechanism based on the self-rope action of a coil spring that can be added.

Next, the present invention will be described in detail based on an embodiment of a pine surge machine shown in the drawings incorporating a chair back pine surge mechanism. The chair is constructed of an underframe 2 that is made of pipes and has a seat and armrests, and a backrest frame 1 that is also made of pipes.
The lower end of the seat is pivotally supported by the under frame 2, and a gas spring 15 is attached between the frame 1 and the under frame 2, so that the backrest can be reclined. A pair of guide rails 12 each having a U-shaped cross section and facing opening surfaces are fixed to both sides of the frame 1 of the backrest. Also, at the upper end of the frame 1 is a headrest 13.
A cover sheet 14 is attached to the front of the frame 1, and a vertically long support belt 99 is attached to both sides of the back of the cover sheet 14.
are arranged.

Now, the pine surge mechanism has a control box 26 on one side.
and the control box 26 and the connecting plate 28 on the other side.
It also includes a pair of wheels 3, which are eccentrically attached to the main shaft 4 in the same direction and inclined in opposite directions, as treatment elements. Each wheel body 3 is composed of an eccentric inner ring 20 fixed to the main shaft 4 and an outer ring 21 freely rotatable around the outer circumference of the eccentric inner ring 20 via balls 22.
The inner circumference and outer circumference of the outer ring 21 have a large number of ribs 23.
connected by. As is clear from FIG. 2, the main shaft 4 is a hollow pipe through which the drive shaft 5 is inserted, and a cylindrical body 62 is fitted at both ends so as to freely rotate. The drive shaft 5 has cylinders 62 connected to both ends thereof, and the cylinders 62 have rollers 19 running on the guide rails 12 and pinions 18 that mesh with racks 11 attached to each guide rail 12. and is provided. Rollers 19 are also provided in both control box 26 and gearbox 27. The motor M, which is a driving source and can freely rotate in forward and reverse directions, is mounted on the side of the gearbox 27.
is provided as a housing for the stator 17, and selectively drives the main shaft 4 and the drive shaft 5 via a reduction gear within the gearbox 27.
When rotating the main shaft 4, the wheel body 3 is tilted eccentrically.
rotates at the same time, and because the wheel body 3 is eccentric, the amount of protrusion of the wheel body 3 toward the cover sheet 14 side is changed periodically. Further, since the wheels 3 are inclined in opposite directions, the distance between the pair of wheels 3 at the contact portion with the cover sheet 14 is changed periodically. The combination of these two movements results in a fir tree surge to the human body. Main shaft 4
If the drive shaft 5 is rotated instead, the entire pine surge mechanism is self-propelled in the vertical direction of the backrest by the rotation of the pinion 18 that engages with the rack 11 of the frame 1 and the traveling guide by the 19. This self-propelling causes the wheel body 3, which is a treatment element, to move, and by reciprocating within a certain range, the wheel body 3 covers the back of the human body with the cover sheet 1.
4 to rub and pine surge. Furthermore, this pine surge machine is equipped with a mechanism that allows the width between the pair of wheels 3 to be varied. This is main shaft 4
It is composed of a feed screw 6 parallel to the drive shaft 5, and a pair of connecting arms 25 that connect the feed screw 6 and the inner ring 20 of each wheel body 3. One end is a right-hand threaded part and the other is a left-hand threaded part from the center in the direction, and a connecting arm 25 has one end screwed into each threaded part. The other end of both connecting arms 25 is connected to the inner ring 20 of each wheel body 3, and each inner ring 20 of both wheel bodies 3 is connected to the main shaft 4 so as to be slidable in the axial direction by, for example, a spline. The rotation of the screw 6 causes the pair of wheels 3 to approach each other or move away from each other. In this embodiment, when the feed screw 6 rotates, the main shaft 4 is also constantly rotating as described later, so a thrust bearing 98 is disposed at the connection between the connecting arm 25 and the inner ring 20. The connection is such that it can freely rotate. Further, regarding the movement of the two wheel bodies 3 in the direction in which the two wheel bodies 3 approach each other, the movement of the connecting arm 25 is transmitted to the wheel body 3 via the spring 90, so that, for example, the neck is not pinched by strong force.

Next, the reduction gear device in the gearbox 27 will be explained. The main speed reduction device is a planetary mechanism 8 that performs differential speed reduction, and this planetary mechanism 8 includes an output shaft 51 to which the rotor 16 of the motor M is attached, a planetary roller 52 whose large diameter portion rolls on the outer surface of the output shaft 51, a first outer ring 53 in which the large diameter portion of the planetary roller 52 is inscribed; a second outer ring 54 in which the small diameter portion of the planetary roller 52 is inscribed;
The retainer 55 is a planetary carrier that supports the planetary roller 52. First outer ring 5
The third and second outer rings 54 are meshed with a gear 57 and a gear 58 supported by a shaft 56, respectively, and the gear 57
A gear 59 that rotates together with the cylindrical body 62 meshes with a gear 60 that forms a clutch 9 as a torque limiter.
An elliptical gear 63 that rotates together with the main shaft 4 meshes with an elliptical gear 64 fixed to the main shaft 4. Here, the main shaft 4 is connected via a pair of elliptical gears 63 and 64 so that when the amount of protrusion of the wheel body 3 toward the cover sheet 14 increases, the torque increases and the angular speed of rotation is slow. This is to increase the amount of time it takes to bend and press the human body. However, in this lever, if the first outer ring 53 of the planetary mechanism 8 is locked from rotating, differential rotation will occur in the second outer ring 54 due to the difference in diameter between the large diameter part and the small diameter part of the planetary roller 52. This rotation is transmitted to the main shaft 4, and conversely, if the rotation of the second outer ring 54 is prevented, differential rotation occurs in the first outer ring 53 and is transmitted to the drive shaft 5.

Next, a power transmission system to the feed screw 6 will be explained. A connection gear 61 for deceleration is engaged with the gear 58 provided between the planetary mechanism 8 and the main shaft 4, and an electromagnetic clutch 10 is further connected to this connection gear 61. gearbox 27
The electromagnetic clutch 10 housed inside has an outer input hub 82 and an inner input hub 81 whose outer peripheral surfaces are shaped like gears and mesh with the connecting gear 61, and an outer output hub 84 and an inner output hub 83 as output members. A feed shaft 8 is provided with an electromagnet 87 consisting of a coil 88, a yoke 89, and a cylindrical iron core 90, and is rotatably supported by a bearing in the gear box 27 and connected to the feed screw 6 at one end.
An inner output hub 83 is fixed to the inner output hub 83, and an outer input hub 82 and an inner input hub 81 are held on one axial side of the inner output hub 83, and an electromagnet 87 is freely rotatably held on the other side of the feed shaft 80. The inner input hub 81 and the outer input hub 82 are press-fitted and fixed to each other so as to form a double cylindrical shape, and a space for arranging a coil spring 86 is formed between them. In addition, the outer output hub 84 and the inner output hub 83
are connected to each other so as to rotate together by engaging a protrusion at one end of the outer output hub 84 with a notch provided in a flange formed at one end of the inner output hub 83 on the electromagnet 87 side. A space for arranging a coil spring 86 is also provided between the inner circumferential surface of the outer output hub 84 and the outer circumferential surface of the inner output hub 83, and a ring-shaped coil spring 86 located on the front surface of the flange is provided between the two. space is provided. This space is a space for disposing a ring-shaped clutch 85 made of a magnetic material, and the electromagnetic force of the electromagnet 87 causes the clutch 85 to come into contact with the clutch surface on the front surface of the flange. The inner output hub 83 is made of a magnetic material at least at one end with a flange to form a magnetic circuit, and the outer output hub 84 is made of a non-magnetic material. The coil spring 86 has one end engaged with the inner input hub 81 and the other end engaged with the clutch shoe 85.
2 and the inner input hub 81 and the arrangement space between the outer output hub 84 and the inner output hub 83.

In this electromagnetic clutch 10 configured as described above, when the electromagnet 87 is not energized, the clutch shoe 85 is not in contact with the clutch surface, and the coil spring 86 is in contact with the inner peripheral surface of the outer output hub 84. Since the outer peripheral surface of the inner output hub 83 is not in contact with the outer peripheral surface of the inner output hub 83, even if rotational power is transmitted from the connecting gear 61 that meshes with the outer input hub 82 to the input hubs 82, 81,
By simply rotating the coil spring 86 and clutch shoe 85 together with these, the output hubs 84, 8
3 does not rotate and is in a separated state. However, when the electromagnet 87 is excited to bring the clutch shoe 85 into suction contact with the clutch surface, resistance will be generated in the rotation of the clutch shoe 85 to which the coil spring 86 is connected. The diameter becomes smaller or larger depending on the direction of rotation. When the diameter becomes smaller, the coil spring 86 wraps around the outer peripheral surface of the inner output hub 83 and transmits rotational power to the inner output hub 83, and when the diameter becomes larger, it comes into pressure contact with the inner peripheral surface of the outer output hub 84 to transmit rotational power. It is transmitted to the outer output hub 84. The rotation of these output hubs 84 and 83 is taken out from the feed shaft 80 and rotates the feed screw 6.

Now, the rotation of the first outer ring 53 and the second outer ring 54 in the planetary mechanism 8 is selectively prevented, and the motor M
The members for switching the power between the main shaft 4 and the drive shaft 5 are a single solenoid SOL and a braking mechanism 7 controlled by this solenoid SOL.
This braking mechanism 7 housed in the gearbox 27 has a fixed hub plate 30 through which a shaft 29 is inserted, and is fixed to both sides of the fixed hub plate 30 in the axial direction, as shown in FIGS. 5 to 7. A pair of fixed hubs 31, 35, a pair of movable hubs 32, 36 supported by a shaft 29 and arranged in the axial direction of each fixed hub 31, 35, each movable hub 32, 36 and fixed hub 3
a pair of left and right outer circumferential collars 33, 37 and an inner circumferential collar 34, 38 disposed on the outer circumference and inner circumference extending over the fixed hubs 31, 35, and the inner circumferential surface extending over the fixed hubs 31, 35 and each movable hub 32, 36; and a total of four coil springs 41, 42, 43, 44 arranged so as to be in contact with the outer peripheral surface, and a fixed hub 31,
At 35, each inner gear part 46 and the gear part 4 are supported by a connecting shaft 39, and the outer collar 33, the inner collar 34, the outer collar 37, and the inner collar 38 are connected to each other.
7 and a pinion 40, both outer peripheral collars 33 and 37 are connected to a solenoid SOL arranged perpendicularly to the shaft 29, and one movable hub 32 is engaged with the gear 58. The other movable hub 36 is connected to the drive shaft 5 by meshing with the gear 57 via a shaft 29 passing through each member and a gear 65. Also, among the four coil springs, two coil springs located on the outer circumferential side have different winding directions.
The coil springs 42 and 44 are connected to the fixed hub 3.
1, 35 and the movable hubs 32, 36, one end of each is inserted into the engagement hole 48 of the fixed hub plate 30, and the other end is inserted into each of the outer peripheral collars 33, 37.
two coil springs 41 with different winding directions and located on the inner circumferential side,
43 is the fixed hub 31, 35 and the movable hub 32,
It has an outer diameter larger than the inner diameter of the hub plate 36, and has one end thereof engaged with an engagement hole 48 of the fixed hub plate 30, and the other end thereof engaged with an engagement portion 49 of each inner peripheral collar 32, 38. The coil springs 41 and 42 are wound in the same direction, and the coil springs 43 and 44 are wound in the same direction.

In this braking mechanism 7 configured as described above, when the solenoid SOL is in the returned state by the return spring 45, the inner peripheral surfaces of the movable hub 36 and the fixed hub 35 connected to the drive shaft 5 and A coil spring 4 is attached to the outer peripheral surface as shown in Fig. 7b.
The movable hub 32 and the fixed hub 31 connected to the main shaft 4 are connected to the seventh As shown in FIG. The movable hub 32 and the fixed hub 31 are further wound in the winding direction by an inner circumferential collar 34 that rotates with a force of 45, so that the diameter becomes smaller.
Since the movable hub 32 is separated from the circumferential surface of the main shaft 4, the movable hub 32 is disconnected from each other, and therefore the movable hub 32 connected to the main shaft 4 is in a free state. That is, at this time, the rotation of the motor M is transmitted to the main shaft 4 after being decelerated by differential deceleration by the planetary mechanism 8. When the solenoid SOL is activated, both outer collars 3 move in the direction shown by the arrows in Figure 7.
3 and 37 rotate, the inner peripheral collars 34 and 38 also rotate in the opposite direction via the pinion 40, and the movable hubs 32 and 36 and the fixed hubs 31 and 35 are connected by the coil springs 41, 42, 43, and 44. In order to reverse the above case, the rotation of the movable hub 32 connected to the main shaft 4 is locked, so that the differential deceleration output of the motor M is transmitted to the drive shaft 5. In this braking mechanism 7, both movable hubs 32 and 36 are connected to the planetary mechanism 8 or to the main shaft 4 and drive shaft 5 at one end in the axial direction, thereby consolidating the arrangement of the braking force transmission system. . Also, as is clear from FIG. 7b, in this case, the coil springs 41, 42, when in the free state and preventing the rotation of the movable hubs 32, 36,
43, 44 are these and each color 33, 34, 3
The engagement with 7 and 38 is designed to have some play, and the rotation lock is not released until more than half of the stroke of the solenoid SOL has elapsed. A situation is created in which the rotation of the hubs 32, 36 is locked together. This is to prevent the wheel body 3 from rotating or moving up and down due to input from the load side during switching.
In addition, when the power is turned off, the solenoid SOL mentioned above
Since the state is the same as when the power is not energized, that is, the movable hub 36 connected to the drive shaft 5 is locked, the pine surge mechanism does not descend under its own weight.

However, if an excessive load is applied, such as when the pine surge machine is dropped, the clutch 9 will slip and allow the pine surge mechanism to descend, thereby absorbing this load. In other words, this clutch 9 includes the gear 60 attached to the cylindrical body 62 so as to be freely rotatable and slidable in the axial direction, the engagement plate 91 fixed to the cylindrical body 62, and the gear 60 and the engagement plate 91. If an excessive load is applied in the vertical direction, the gear 60 and the engagement plate 91 will be biased in the direction of engagement, despite the braking by the braking mechanism 7.
The cylindrical body 62 rotates when it disengages from the cylindrical body 62. Furthermore, this clutch 9 is
It incorporates a means to enable manual vertical movement when vertical movement becomes impossible due to some kind of failure. This is a release plate 93 that is in contact with the other surface of the spring 92. In the event of a failure, the release plate 93 is pulled out once and the spring 92 is moved back to release the force that presses the gear 60.
2 and the drive shaft 5, in other words, the pine surge mechanism can be moved up and down. 94 is a guide plate for holding the release plate 93;
It also serves as a guide when re-inserting 3.

[Effects of the Invention] As described above, the present invention utilizes the characteristics of the planetary mechanism, and also applies braking to one of the two outputs of this planetary mechanism and transmits the output of the other to the treatment element. The braking mechanism of is configured using a coil spring that can selectively apply braking to both outputs of the planetary mechanism with a single control input, and this braking acts on bidirectional rotation, making it compact. In addition, it is possible to control large torque.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a cutaway plan view of the same, Fig. 3 is a cutaway rear view of the same, Fig. 4 is a side view of the same, and Figs. 5a and b are the same as the above. 6 is an exploded perspective view of the above braking mechanism, and FIGS. 7a and 7b are cross sectional views seen from different directions to explain the operation of the above braking mechanism. 3 is the circular body as a treatment element, 7
is a braking mechanism, 8 is a planetary mechanism, 29 is a shaft, 31,3
5 is a fixed hub, 32, 36 is a movable hub, 33, 3
7 is the outer collar, 34, 38 is the inner collar, 40
indicates pinion.

Claims (1)

[Scope of Claims] 1. A planetary mechanism is arranged between a drive source and a treatment element, one of the two outputs taken out from the planetary mechanism is braked, and the other output is transmitted to the treatment element. , a cylindrical fixed hub, a pair of movable hubs each connected to each output of the planetary mechanism and arranged on both sides of the fixed hub in the axial direction, and an inner circumference and an outer circumference extending between the fixed hub and each movable hub. Two pairs of braking coil springs arranged as a pair each performing braking in different directions, an outer collar arranged on the outer periphery of each coil spring located on the outer periphery, and an inner periphery of each coil spring located on the inner periphery. and an inner circumferential collar arranged on the hub, and is characterized by being equipped with a braking mechanism that brakes one movable hub with a coil spring driven by a control input that rotates the outer circumferential collar and the inner circumferential collar. Pine surge machine output switching device. 2. Claim 1, characterized in that the transmission member that transmits the control input from the outer collar to the inner collar is located axially midway between each pair of outer collar and inner collar that are lined up in the axial direction. Output switching device for pine surge machine. 3. The output switching device for a pine serge machine according to claim 1, wherein braking is applied to both movable hubs at an intermediate position of the stroke of the control input. 4. Claim 1, characterized in that one movable hub is fixed to one end of a shaft passing through the other movable hub, and the other end of the shaft is connected to one output of the planetary mechanism. Output switching device for pine surge machine.