JP2002221203A - Work condition changeover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work condition changeover device capable of properly maintaining the neutral condition of a member to be controlled. SOLUTION: The work condition changeover device 10 turns a link 33 communicated with the member to be controlled in either one-side direction or the other-side direction and selectively switches the neutral condition to a first work condition or a second work condition. The work condition changeover device 10 is integrally mounted to the link 33 and a body stopper 44 fixed to a valve housing 31, and comprises a link stopper 46 for setting the neutral condition of the member to be controlled by being positioned in the peripheral direction corresponding to the body stopper 44, and a torsion spring 34 disposed on almost the same coaxis of the link 33 and fixed while keeping a predetermined energizing force so as to position the link stopper 46 in the peripheral direction corresponding to the body stopper 44. The neutral condition of the member to be controlled is set by positioning the link stopper 46 in the peripheral direction by the predetermined energizing force using the torsion spring 34 corresponding to the body stopper 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating state switching device for switching a link interlocking with a controlled member in one direction or another direction to switch from a neutral state to a corresponding operating state. is there.

[0002]

2. Description of the Related Art Conventionally, various types of operating state switching devices are known. Such a device usually holds a link that is linked to the controlled member so as to be in a neutral state, and drives the link in one of one side and the other side to respond from the neutral state. Switching to active state. For example, Japanese Unexamined Utility Model Publication No. Hei 6-30452 discloses a diaphragm actuator as an operation state switching device. In this actuator, the inside of the outer shell is partitioned by a diaphragm, and negative pressure chambers are respectively formed on one side and the other side. Each negative pressure chamber is provided with a coil spring for urging the diaphragm on the side facing each other. Therefore, the diaphragm is usually positioned at a position where the biasing force of these coil springs is balanced, where no negative pressure is applied, and the controlled member connected via the rod of the diaphragm is set to a neutral state.

[0003]

In the operating state switching device described in the publication, the neutral state is set by the balance of the urging forces of both coil springs, so that the holding force is substantially nil. I have. Accordingly, as shown in FIG. 6, the balance of the urging force of these coil springs is easily lost due to the influence of the external force, and accordingly, it is difficult to maintain the neutral state. Further, the balance between the urging forces of the two coil springs is also lost due to the variation in the spring load of the coil springs, so that the setting of the neutral state also varies correspondingly.

[0004] It is an object of the present invention to provide an operating state switching device capable of suitably holding a neutral state of a controlled member.

[0005]

In order to solve the above-mentioned problems, the invention according to the first aspect is characterized in that a link interlocking with a controlled member is rotated in one direction of one side and the other side. In an operation state switching device for selectively switching from a neutral state to a first operation state or a second operation state, a body stopper fixed to an immovable portion and a link provided integrally with the link, and a circumferential direction corresponding to the body stopper A link stopper that sets the neutral state of the controlled member by being positioned at;
A torsion spring that is disposed on a substantially concentric axis with the link and that is attached while holding a predetermined urging force so as to position the link stopper in the circumferential direction corresponding to the main body stopper, and the torsion spring The gist is to set the neutral state of the controlled member by positioning the link stopper in the circumferential direction with a predetermined urging force corresponding to the main body stopper.

According to a second aspect of the present invention, there is provided a first actuator which is connected to a link interlocked with a controlled member, and switches the link from a neutral state to a first operating state by rotating the link in one direction by introducing a negative pressure. And a second actuator connected to the link and turning the link to the other side by introducing a negative pressure to switch from the neutral state to the second operating state,
In the operating state switching device set so that the biasing forces of the first actuator and the second actuator are balanced in the neutral state of the controlled member, the main body stopper fixed to the immovable portion and the link are integrally provided. A link stopper that is positioned in a circumferential direction corresponding to the main body stopper to set a neutral state of the controlled member; and a link stopper that is disposed substantially concentrically with the link and that corresponds to the main body stopper. A torsion spring which is attached while holding a predetermined urging force so as to position the stopper in the circumferential direction. The torsion spring causes the link stopper to move in the circumferential direction with a predetermined urging force corresponding to the main body stopper. The gist is to set the neutral state of the controlled member by positioning.

[0007] The invention described in claim 3 is the first or second invention.
In the operation state switching device described in the above, the torsion spring is urged to one side and the other side in the circumferential direction of the main body stopper in a manner that each arm formed at one end and the other end sandwiches the link stopper. The point is that they are attached.

According to a fourth aspect of the present invention, in the operating state switching device according to any one of the first to third aspects, at least one of the first operating state and the second operating state of the controlled member is provided. The gist of the invention is to provide a rotation restricting means for restricting a rotation range of the link.

According to the first or second aspect of the present invention, in the neutral state of the controlled member, the torsion spring moves the link stopper corresponding to the main body stopper in the circumferential direction with a predetermined urging force. It is set by positioning. Therefore, the fluctuation of the neutral state of the controlled member is suppressed by using the urging force of the torsion spring as a holding force. Then, it is possible to maintain a suitable neutral state that is hardly affected by external influences.

According to the third aspect of the present invention, the torsion spring is attached to one side and the other side in the circumferential direction of the main body stopper in such a manner that each arm formed at one end and the other end sandwiches the link stopper. It is mounted in force. Since the main body stopper is fixed to the immovable portion, the torsion spring is not deformed unless a load is applied from the link stopper. For example, when each of the arms of the torsion spring is biased and attached to one side and the other side in the circumferential direction of the link stopper so as to sandwich the main body stopper, the arm is pivoted by the link stopper or the like. Unnecessary deformation occurs in the torsion spring. By suppressing such unnecessary deformation of the torsion spring, the life of the torsion spring can be extended.

According to the fourth aspect of the present invention, there is provided a rotation restricting means for restricting a rotation range of the link corresponding to at least one of the first operation state and the second operation state of the controlled member. I have. Therefore, the first operation state or the second operation state of the controlled member is suitably set.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. FIG. 1 is a front view showing an operation state switching device 10 of the present embodiment. As shown in FIG. 1, the operation state switching device 10 includes a first actuator 11, a second actuator 12, and a flow path switching mechanism 13.
It has.

As shown in the schematic diagram of FIG.
And the outer shells 11a, 1 of the second actuators 11, 12
The inside of 2a is partitioned by diaphragms 15 and 16, respectively. Negative pressure chambers 17, 18 and atmospheric pressure chambers 19, 20 are formed on one side and the other side (upper and lower sides in FIG. 3) of the diaphragms 15, 16 respectively. The negative pressure chambers 17 and 18 have negative pressure inlets 17a and 17 respectively.
8a is provided so that a negative pressure is selectively introduced according to the control state. On the other hand, the atmospheric pressure chamber 1
Atmospheric pressure is introduced at 9,20.

Rods 21 and 22 are connected to the diaphragms 15 and 16, respectively. The distal ends of the rods 21 and 22 are connected via the flow path switching mechanism 13. In addition, these rods 21 and 22
The axial length is set so that the diaphragms 15 and 16 do not deform when the flow path switching mechanism 13 is in a neutral state in a manner described later.

The negative pressure chambers 17 and 18 accommodate coil springs 23 and 24 for urging the diaphragms 15 and 16 toward the atmospheric pressure chambers 19 and 20, respectively. These coil springs 23 and 24 are set so as to generate substantially the same urging force when the flow path switching mechanism 13 is in the neutral state. Therefore, when the negative pressure is not introduced into the negative pressure chambers 17 and 18 and both are maintained at the atmospheric pressure, the urging forces of the coil springs 23 and 24 are balanced and the flow path switching mechanism 13 is also in the neutral state. is there.

The flow path switching mechanism 13 includes a valve housing 31 forming an immovable portion, a valve shaft 32 rotatably supported by the valve housing 31, and a valve shaft 32.
And a torsion spring 34 provided integrally with the torsion spring.

As shown schematically in FIG. 4, a flow passage switching chamber 35 having a cross section substantially concentric with the valve shaft 32 is formed in the valve housing 31. Further, a valve body 36 that constitutes a controlled member that protrudes in a plate shape to the vicinity of the inner wall surface of the flow path switching chamber 35 is fixed to the valve shaft 32. In addition, in the flow path switching chamber 35, the introduction pipes 40 arranged in a cross in a manner substantially orthogonal to each other,
The pipe 41, the second pipe 42, and the third pipe 43 communicate with each other. Then, as shown in FIG. 4A, the flow path switching mechanism 13 (the valve body 3) in which the valve shaft 32 is not rotated.
6) In the neutral state, the introduction pipe 40 and the third pipe 43
And communicate with each other. And introduction pipe 4
Fluid from 0 is basically discharged to the third pipe 43.

As shown in FIG. 4 (b), the valve shaft 32 rotates in one direction (counterclockwise in FIG. 4 (b)). In the first operation state, only the introduction pipe 40 and the first pipe 41 communicate with each other. Then, the fluid from the introduction pipe 40 is discharged to the first pipe 41.

On the other hand, as shown in FIG. 4C, the valve shaft 32 rotates in the other direction (clockwise in FIG. 4C). In the two-operation state, only the introduction pipe 40 and the second pipe 42 communicate with each other. Then, the fluid from the introduction pipe 40 is discharged to the second pipe 42.

As described above, the flow path switching mechanism 13 (valve element 36) is selectively switched from the neutral state to the first operation state or the second operation state, whereby the flow on the discharge side corresponding to the introduction pipe 40 is provided. Road (first to third pipes 41 to 41)
43) is switched.

As shown in the sectional view of FIG. 2, a base 31a is formed in the valve housing 31 so as to project substantially concentrically with the valve shaft 32. This pedestal 31a
Has a reduced diameter at the distal end side via the step 31b, and forms a tray for positioning the torsion spring 34.
That is, by positioning the torsion spring 34 outside at the reduced diameter portion of the pedestal 31a, the base end side is positioned substantially concentrically with the valve shaft 32. The reduced diameter portion of the pedestal 31a
The torsion spring 34 also has a function as a guide on the base end side when the torsion spring 34 is deformed.

The valve housing 31 is integrally formed with a main body stopper 44 projecting in a plate shape radially outside the pedestal 31a. As shown in FIG. 1, the main body stopper 44 is connected to the third pipe 43.
(And the introduction pipe 40) at a position on a dashed line Y substantially along the axis of the introduction pipe 40.

The link 33 has an outer diameter substantially equal to the outer diameter of the pedestal 31a of the valve housing 31 and is formed in a substantially disk shape. The link 33 is disposed concentrically with the valve shaft 32 and provided so as to rotate integrally with the valve shaft 32. This link 33
A link stopper 46 protruding in different radial directions from each other, a first link-side rotation stopper 47 and a second link-side rotation stopper 48 constituting a rotation restricting means are integrally formed. When the link stopper 46 is disposed to face the main body stopper 44 substantially along the alternate long and short dash line Y, the link 33 brings the valve body 36 fixed to the valve shaft 32 into a neutral state (see FIG. 4A). ).

A peripheral wall 33a protruding toward the valve housing 31 is formed between the link stopper 46, the first link-side rotation stopper 47, and the second link-side rotation stopper 48 of the link 33. The torsion spring 34
By positioning the peripheral wall 33a outside, the front end side is positioned substantially concentrically with the link 33 (valve shaft 32). The peripheral wall 33a also has a function as a guide on the distal end side when the torsion spring 34 is deformed. In addition,
The torsion spring 34 is connected to the link stopper 46, the first
It goes without saying that the movement in the axial direction is restricted by being locked to the opposing wall surfaces of the link-side rotation stopper 47 and the second link-side rotation stopper 48.

At the tip of the link stopper 46, there is formed a locking piece 46a which is folded back toward the valve housing 31 and projects to the vicinity of the step 31b. here,
The torsion spring 34 is wound so as to have an inner diameter substantially equal to the outer diameter of the pedestal 31a (reduced diameter portion) of the valve housing 31 and the outer diameter of the peripheral wall 33a of the link 33. Arm 34a, 34b bent in the direction
Is formed. As shown in FIG. 1, the torsion spring 34 is housed between the valve housing 31 and the link 33 in a state where the arms 34a and 34b are urged to one side and the other side in the circumferential direction of the main body stopper 44. Have been. The link stopper 46 (locking piece 46a) of the link 33 is arranged so as to be sandwiched between the arms 34a and 34b.

The arms 34a, 34 of the torsion spring 34
b is locked to the main body stopper 44 with a biasing force in the torsion direction for sandwiching the main body stopper 44. Therefore, when switching the operation state of the flow path switching mechanism 13 (valve element 36), the link 33
locking piece 4 of link stopper 46 sandwiched between a and 34b
It rotates while resisting the urging force of the torsion spring 34 via 6a. In other words, the link 33 is positioned in the circumferential direction using the urging force of the torsion spring 34 as a holding force. As described above, the link stopper 4 of the link 33 is used.
When the valve 6 is disposed to face the main body stopper 44, the flow path switching mechanism 13 (valve element 36) is in a neutral state. Therefore,
In the neutral state of the flow path switching mechanism 13, the fluctuation is suppressed by using the urging force of the torsion spring 34 as a holding force.

Here, the first and second actuators 11 and 12 are fixed to the valve housing 31 so as to be substantially symmetric with respect to the dashed line Y. And
Each rod 2 of the first and second actuators 11 and 12
One end of each of the first and second ends is connected to a corresponding side of the link 33 at a position substantially symmetrical with respect to the projecting direction of the link stopper 46. Therefore, when the flow path switching mechanism 13 (valve element 36) is in the neutral state, the link stopper 46 projects substantially along the dashed line Y,
22 is also substantially symmetric with respect to the dashed line Y.

Then, for example, the first actuator 1
When a negative pressure is introduced only from the negative pressure inlet 17 a into the negative pressure chamber 17, the diaphragm 15 is pushed up together with the rod 21 against the urging force of the coil spring 23 due to a pressure difference from the atmospheric pressure chamber 19. Can be Then, the link 33 rotates to one side (counterclockwise direction in FIG. 1). At this time, it goes without saying that the rod 22 is pushed down via the link 33. The link 33 is a link stopper 4
6 (locking piece 46a), the arm 34b of the torsion spring 34 on the rotation side is pressed integrally against the valve body 36 while being pressed against the urging force, and is switched to the first operating state.

Conversely, when a negative pressure is introduced from the negative pressure inlet 18 a only into the negative pressure chamber 18 of the second actuator 12, the diaphragm 16 causes the coil spring 24 to move due to a pressure difference from the atmospheric pressure chamber 20. It is pushed up with the rod 22 against the urging force. Then, the link 33 rotates to the other side (clockwise in FIG. 1). At this time, the rod 21 is similarly pushed down via the link 33. The link 33 is connected to the arm portion 34 of the torsion spring 34 on the rotation side by a link stopper 46 (locking piece 46a).
a is rotated integrally with the valve body 36 while pressing a against the urging force to switch to the second operating state.

The first and second link-side rotation stoppers 4
The projections 7 and 48 project in a radial direction substantially symmetrical with respect to the projection direction of the link stopper 46. Accordingly, when the flow path switching mechanism 13 (valve element 36) is in the neutral state, the link stopper 46 projects substantially along the dashed line Y, so that the first and second link side rotation stoppers 47, 4 are provided.
8 is substantially symmetric with respect to the dashed line Y. The tip portions of the first and second link-side rotation stoppers 47, 48 are folded back toward the valve housing 31 to form locking pieces 47a, 48a (see FIG. 2). On the other hand, the valve housing 31 is provided with a first rotation stopper 51 and a second rotation stopper 52 which constitute a rotation restricting means which is substantially symmetrical with respect to the dashed line Y. Therefore, when the flow path switching mechanism 13 (valve element 36) is in the neutral state, the angle M until the first link-side rotation stopper 47 comes into contact with the first rotation stopper 51,
The angle N until the link-side rotation stopper 48 comes into contact with the second rotation stopper 52 is substantially the same. And
When the link 33 rotates to one side (counterclockwise direction in FIG. 1), the first link-side rotation stopper 47 (the locking piece 47)
a) is locked by the first rotation stopper 51 so as to regulate the rotation range of the link 33. On the other hand, link 3
When 3 rotates to the other side (clockwise in FIG. 1),
The second link side rotation stopper 48 (locking piece 48a) is
Locked by the rotation stopper 52, the rotation range of the link 33 is similarly regulated. As described above, the rotation of the valve body 36 linked to the link 33 is restricted to a predetermined range.

When the first link-side rotation stopper 47 (locking piece 47a) of the link 33 is locked by the first rotation stopper 51, the introduction pipe 40 is connected to the first pipe 41.
(See FIG. 4B). Further, when the second link side rotation stopper 48 (locking piece 48 a) of the link 33 is locked by the second rotation stopper 52, the introduction pipe 40 communicates with the second pipe 42. (See FIG. 4C).

Incidentally, the first and second rotation stoppers 51 and 52 have the function of adjusting the locking positions with the first and second link-side rotation stoppers 47 and 48, respectively. The rotation range of the link 33, that is, the valve body 3
6 can be adjusted.

FIG. 5 is a graph showing spring characteristics according to the above configuration. As shown in the drawing, the neutral state of the flow path switching mechanism 13 (valve element 36) is such that the biasing forces of the coil springs 23 and 24 of the first and second actuators 11 and 12 are balanced and the torsion spring 34 is Is set as having the urging force as the holding force. Therefore, this neutral state is less likely to be affected by an external force and is suitably maintained. Further, the neutral state is hardly affected by the variation in the spring load of the coil springs 23 and 24, and the variation is suppressed.

As described in detail above, according to the present embodiment, the following effects can be obtained. (1) In the present embodiment, the flow path switching mechanism 13 (the valve 3
6) The neutral state is set by positioning the link stopper 46 in the circumferential direction with a predetermined urging force corresponding to the main body stopper 44 by the torsion spring 34. Therefore, in the neutral state of the flow path switching mechanism 13 (valve element 36), the fluctuation is suppressed by using the urging force of the torsion spring 34 as a holding force. Then, it is possible to maintain a suitable neutral state that is hardly affected by external influences.

(2) In this embodiment, the torsion spring 3
4 are arms 34a, 34b formed at one end and the other end, respectively.
The main body stopper 4 is sandwiched by the
4 is urged and attached to one side and the other side in the circumferential direction. Since the body stopper 44 is fixed to the valve housing 31, the torsion spring 34 is not deformed unless a load is applied from the link stopper 46. For example, each arm 34 of the torsion spring 34
When the link stoppers 46a and 34b are attached by being urged to one side and the other side in the circumferential direction of the link stopper 46 so as to sandwich the main body stopper 44, the torsion spring is caused by the swing of the link stopper 46 (link 33) or the like. Unnecessary deformation occurs in 34. By suppressing such unnecessary deformation of the torsion spring 34, the life of the torsion spring 34 can be extended.

(3) In the present embodiment, the first and second restricting members 30 restrict the rotation range of the link 33 in accordance with the first operation state and the second operation state of the flow path switching mechanism 13 (valve element 36). Link side rotation stoppers 47 and 48 and first and second rotation stoppers 51 and 52 are provided. Therefore, the first operation state and the second operation state of the flow path switching mechanism 13 (valve element 36) can be suitably set.

(4) In the present embodiment, the rotation range of the link 33 corresponding to the first operation state and the second operation state of the flow path switching mechanism 13 (valve element 36) can be adjusted. Therefore, it is possible to suitably adjust the switching state between the first and second operating states in accordance with manufacturing variations and the like.

The embodiment of the present invention is not limited to the above embodiment, but may be modified as follows. In the above-described embodiment, the position of the main body stopper 44, which is a reference for the neutral state, is arranged on the dashed line Y, but this arrangement is arbitrary. In short, it is only necessary that the flow path switching mechanism (valve element) is set to the neutral state when the link stopper of the link is arranged to face the main body stopper.

In the above embodiment, the link 3
When the third link stopper 46 was disposed to face the main body stopper 44, the flow path switching mechanism 13 (valve element 36) was set to a neutral state. On the other hand, the neutral state may be set when the link stopper of the link is shifted by a predetermined angle with respect to the main body stopper.

In the above-described embodiment, the connection of the main body stopper 44, the link stopper 46, and the arms 34a, 34b is performed outside the link 33 and the torsion spring 34 in the radial direction. On the other hand, for example, the main body stopper 4 is provided radially inside the link 33 and the torsion spring 34.
4. The link stopper 46 and the arms 34a, 34b may be connected to each other.

In the above-described embodiment, the present invention is applied to the switching of the flow path (first to third pipes 41 to 43) on the discharge side with respect to the introduction pipe 40 as the operating state. The present invention may be applied.

Next, technical ideas other than the claims that can be grasped from the above embodiments will be described below together with their effects. (A) The operation state switching device according to any one of claims 1 to 4, wherein the rotation restricting means is capable of adjusting a rotation range of the link. According to this configuration, the state of switching to the first or second operating state can be adjusted appropriately in response to manufacturing variations and the like.

[0043]

As described in detail above, according to the first or second aspect of the present invention, the neutral state of the controlled member can be suitably maintained.

According to the third aspect of the invention, by suppressing unnecessary deformation of the torsion spring, it is possible to extend the life of the torsion spring. According to the invention described in claim 4, the first operating state or the second operating state of the controlled member can be suitably set.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line 2-2 in FIG. 1;

FIG. 3 is a schematic diagram of the embodiment.

FIG. 4 is a schematic view of the embodiment.

FIG. 5 is a graph showing spring characteristics of the embodiment.

FIG. 6 is a graph showing conventional spring characteristics.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 1st actuator 12 2nd actuator 13 Channel switching mechanism 31 Valve housing 33 which constitutes an immovable part 33 Link 34 Torsion spring 34a, 34b Arm 36 Valve body which constitutes a controlled member 44 Body stopper 46 Link stopper 47 Rotation regulation First link-side rotation stopper 48 that constitutes means 48 Second link-side rotation stopper 51 that constitutes rotation restriction means 51 First rotation stopper 52 that constitutes rotation restriction means 52 Second rotation that constitutes rotation restriction means Dynamic stopper

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F02D 11/06 F02D 11/06 A F16K 31/44 F16K 31/44 C (72) Inventor Hirohisa Takano Asahi, Kariya city, Aichi prefecture 2-1-1, Amachi, Aisin Seiki Co., Ltd. (72) Inventor Toru Fujikawa 2-1-1, Asahi-cho, Kariya-shi, Aichi Pref. Address Aisin Seiki Co., Ltd. (72) Inventor Hisashi Miwa 1st Tenno, Takaoka Shinmachi, Toyota City, Aichi Prefecture Aisin Takaoka Co., Ltd. F-term (reference) 3G065 CA00 DA02 HA06 HA12 HA20 HA21 KA13 KA14 3H063 AA02 AA07 AA08 BB13 DA05 DA15 EE11 3H081 AA15 BB04 CC01 CC25 DD18 3J062 AA60 AB27 AC08 AC09 BA14 BA40 CB02 CB15 CB18 CB27 CB33

Claims (4)

[Claims] 1. An operation state switching device for rotating a link interlocking with a controlled member in one direction or another side to selectively switch a neutral state to a first operation state or a second operation state. A body stopper fixed to an immovable portion; a link stopper provided integrally with the link, and positioned in a circumferential direction corresponding to the body stopper to set a neutral state of the controlled member; and the link. And a torsion spring which is disposed substantially concentrically with the main body stopper and is attached while holding a predetermined urging force so as to position the link stopper in the circumferential direction in correspondence with the main body stopper. An operation state wherein the neutral state of the controlled member is set by positioning the link stopper in a circumferential direction with a predetermined urging force corresponding to the stopper. Changing apparatus. 2. A first actuator connected to a link interlocked with the controlled member, the first actuator turning the link in one direction by a negative pressure to switch from a neutral state to a first operating state, and connected to the link. A second actuator for turning the link to the other side by introducing a negative pressure to switch from the neutral state to the second operating state, and to attach the first actuator and the second actuator in the neutral state of the controlled member. In the operation state switching device set so that the forces are balanced, a main body stopper fixed to an immovable portion, and a link provided integrally with the link, and positioned in a circumferential direction corresponding to the main body stopper, to form the cover. A link stopper that sets a neutral state of the control member; and a link stopper that is disposed substantially concentrically with the link and circumferentially moves the link stopper corresponding to the body stopper. And a torsion spring which is attached while holding a predetermined urging force so as to position the link stopper in a direction corresponding to the main body stopper by the torsion spring. An operating state switching device, wherein a neutral state of the controlled member is set by using the following. 3. The operating state switching device according to claim 1, wherein the torsion spring is provided with one arm in one end and the other end sandwiching the link stopper in a circumferential direction of the main body stopper. An operation state switching device, wherein the operation state switching device is biased and attached to each of a side and another side. 4. The operation state switching device according to claim 1, wherein a rotation range of the link is set in accordance with at least one of a first operation state and a second operation state of the controlled member. An operation state switching device comprising a rotation restricting means for restricting the operation.