JP5986022B2 - Sealing device - Google Patents

Description

  The present invention relates to a sealing device including first and second sealing portions that seal with an object interposed therebetween.

  2. Description of the Related Art Conventionally, as a sealing device, there is known a sealing device that includes first and second sealing portions that seal an object (for example, a film, an opening portion of a packaging bag, etc.) and a solenoid driving unit that moves the first sealing portion. (For example, Patent Document 1). The solenoid drive unit generates a magnetic force when energized, and moves the movable body linearly by the magnetic force.

  When the solenoid drive unit is energized, the movable body moves linearly, so the first seal portion moves from a standby position separated from the second seal portion to a seal position that seals the object with the second seal portion. To do. Thereafter, when the solenoid drive unit is blacked out (energization is interrupted), the magnetic force disappears. For example, the urging force of the urging member returns the movable body to the position before energization, and the first seal portion. Returns to the standby position.

  By the way, residual magnetism exists when the solenoid drive unit is interrupted. And when a residual magnetism is large, since a movable body is hold | maintained by a residual magnetism, a 1st seal | sticker part is hold | maintained in a seal position. As described above, there is a case where the seal device cannot be operated or operated smoothly by causing the first seal portion to malfunction.

JP 2011-51284 A

  Therefore, in view of such circumstances, an object of the present invention is to provide a seal device that can smoothly operate a seal portion.

  The sealing device according to the present invention includes first and second sealing portions that seal with an object interposed therebetween, and a movable body that moves linearly when energized, and the first movable body is moved by moving the first movable body. A solenoid drive unit that moves the seal unit from a standby position that is separated from the second seal unit to a seal position that seals an object with the second seal unit, and driving the solenoid drive unit to the first seal unit A drive transmission unit for transmitting, the drive transmission unit comprising: a pair of support units that support the first seal unit; a connection body that connects the pair of support units and is connected to the movable body; The connecting body is elastically deformed when the first seal portion is located at the seal position so as to be restored when the solenoid driving portion is powered off.

  According to the sealing device according to the present invention, the pair of support portions support the first seal portion, and the connection body connected to the movable body of the solenoid driving portion connects the pair of support portions. . Thereby, the drive of the solenoid drive part is transmitted to the first seal part via the connection body and the pair of support parts.

  Since the movable body moves when the solenoid drive unit is energized, the first seal portion moves from a standby position separated from the second seal portion to a seal position that seals the object with the second seal portion. And when a 1st seal | sticker part is located in a seal position, a connection body elastically deforms.

  After that, when the solenoid drive unit fails, the connection body that has been elastically deformed is restored. Thereby, since the restoring force (elastic force) resists the residual magnetism of the solenoid drive unit, the movable body smoothly returns to the position before energization, and the first seal portion smoothly returns to the standby position. Therefore, the seal portion can be operated smoothly.

  In the sealing device according to the present invention, the connecting body may be formed in a flat plate shape so as to be bent and elastically deformed.

  According to such a configuration, since the connection body is formed in a flat plate shape, the connection body is bent and elastically deformed when the first seal portion is located at the seal position. And when a solenoid drive part carries out a power failure, since a connection body restore | recovers reliably, while a movable body returns reliably to the position before electricity supply, a 1st seal | sticker part returns reliably to a standby position.

  As described above, the sealing device according to the present invention has an excellent effect that the seal portion can be operated smoothly.

FIG. 1 is an overall perspective view of a sealing device according to an embodiment of the present invention as viewed from the front side. FIG. 2 is an overall perspective view of the sealing device according to the embodiment as viewed from the back side. FIG. 3 is an overall rear view of the sealing device according to the embodiment. FIG. 4: shows the schematic diagram in the solenoid drive part of the sealing device based on the embodiment. FIG. 5 shows a system schematic diagram of the sealing device according to the embodiment. FIG. 6: shows the principal part right view in the standby position of the sealing device which concerns on the same embodiment. FIG. 7 is an operation explanatory diagram at the standby position of the sealing device according to the embodiment. FIG. 8 is a right side view of the main part at the nozzle operating position of the sealing device according to the embodiment. FIG. 9 is an operation explanatory diagram at the nozzle operation position of the sealing device according to the embodiment. FIG. 10: shows the principal part right view in the sealing position of the sealing device which concerns on the same embodiment. FIG. 11 is an operation explanatory diagram at the sealing position of the sealing device according to the embodiment. FIG. 12: shows the principal part back surface enlarged view in the sealing position of the sealing device based on the embodiment. FIG. 13: shows the principal part rear view of the sealing device which concerns on other embodiment of this invention. FIG. 14 is a right side view of a main part of a sealing device according to still another embodiment of the present invention.

  Hereinafter, an embodiment of a sealing device according to the present invention will be described with reference to FIGS. The sealing device according to the present embodiment is a heat sealer, but is not limited to such a configuration. For example, an ultrasonic sealing device or a high-frequency sealing device may be used.

  As shown in FIGS. 1 to 5, the sealing device 1 according to the present embodiment includes a first seal portion 2 and a second seal portion 3 that are sealed with an object (for example, an opening portion of a bag) interposed therebetween, 1 is provided with a solenoid drive unit 4 for operating the seal unit 2. The sealing device 1 includes an apparatus body 5 serving as a base, a drive transmission unit 6 that transmits the drive of the solenoid drive unit 4 to the first seal unit 2, and a nozzle that sucks gas into and supplies gas to an object. Part 7. The sealing device 1 includes an input unit 8 for inputting instructions and information, and a control unit 9 for performing each control.

  Each seal part 2 and 3 is provided with seal main bodies 21 and 31 formed in a long shape. Each of the seal portions 2 and 3 includes crimping portions 22 and 32 for crimping the object and pressing portions 23 and 33 for pressing the object. The first seal portion 2 is formed on the first seal body 21 so that the first press portion 23 can be displaced with respect to the first seal body 21 by the elastic force of an elastic body (for example, a spring) 24a. An attachment mechanism 24 for attachment is provided.

  Each crimping part 22 and 32 is provided with heating parts 22a and 32a for thermally welding the object. The first crimping portion 22 is formed in a long shape and is attached to the lower end portion of the first seal body 21. The second crimping part 32 is formed in a long shape and is attached to the upper end part of the second seal body 31. The pair of crimping parts 22 and 32 are configured to be able to contact and separate from each other by the solenoid driving part 4 and the drive transmission part 6.

  Each pressing part 23, 33 is formed with elasticity so as to sandwich the object inserted into the nozzle part 7 together with the nozzle part 7. The first pressing portion 23 is formed in a long shape and is attached to a side portion of the first seal body 21. The second pressing portion 33 is formed in a long shape and is attached to a side portion of the second seal body 31. The pair of pressing portions 23 and 33 are configured to be able to contact and separate from each other by the solenoid driving portion 4 and the drive transmission portion 6.

  The solenoid drive unit 4 moves the first seal unit 2 to a standby position (initial position) P1 that is separated from the second seal unit 3 and a seal position P2 that seals the object with the second seal unit 3. In addition, the solenoid driving unit 4 moves the first seal unit 2 to a nozzle operation position P3 that is a position between the standby position P1 and the seal position P2 and in which the nozzle unit 7 operates.

  The solenoid drive unit 4 is connected to a coil unit 41 that generates a magnetic field when energized and a drive transmission unit 6 (specifically, a connection body 62 described later), and is a movable body that moves linearly by the magnetic field generated in the coil unit 41. 42. The solenoid drive unit 4 regulates the operation of the movable body 42 to thereby position the first seal portion 2 at the nozzle operation position P3, and regulates the operation of the movable body 42 to restrict the first operation. And a second restricting portion 44 for positioning the seal portion 2 at the seal position P2.

  The movable body 42 is connected to a movable main body 42a, which is a movable iron core, and an end of the movable main body 42a, and is connected to a first restricting portion 43 (specifically, a cylindrical portion 43d of a locking body 43a described later). And an insertion portion 42b into which at least a part is inserted. The movable body 42 performs a reciprocating motion along the vertical direction by energizing the coil portion 41 and interrupting the energization (power failure).

  The first restricting portion 43 includes a locking body 43a that locks the movable main body portion 42a of the movable body 42, an operation portion 43b that operates the locking body 43a, and a locking body to restrict the operation of the movable body 42. And an elastic body (for example, a spring) 43c for biasing 43a. The elastic body 43c is contracted with respect to the length when there is no load when the first seal portion 2 is located at the standby position P1 (see FIG. 7) and the nozzle operation position P3 (see FIG. 9). On the other hand, when the first seal portion 2 is positioned at the seal position P2 (see FIG. 11), the first seal portion 2 is in a state of extending with respect to the length when there is no load.

  In the present embodiment, the actuating portion 43b is a coil 43b that generates a magnetic field when energized, and the locking body 43a is a plunger 43a that moves linearly by the magnetic field generated in the coil 43b. The restricting unit 43 is not limited to such solenoid driving, and may be hydraulic driving (for example, hydraulic cylinder) or pneumatic driving (for example, pneumatic cylinder).

  The locking body 43a includes a cylindrical portion 43d inserted into the insertion portion 42b of the movable body 42 at the upper end portion so as to guide the insertion portion 42b of the movable body 42. The cylindrical portion 43d regulates the downward movement of the movable body 42 by the upper end portion coming into contact with the movable main body portion 42a of the movable body 42. In addition, the cylindrical portion 43d includes a hole 43e that has an inner edge hooked on the hook 42c of the insertion portion 42b in order to prevent the locking body 43a and the movable main body 42a from being separated by a predetermined distance or more.

  The second restricting portion 44 restricts the downward movement of the movable body 42 by the upper end portion coming into contact with the movable main body portion 42 a of the movable body 42. The second restricting portion 44 restricts the upward movement of the locking body 43 a by the lower end portion coming into contact with the locking body 43 a of the first restricting portion 43. The second restricting portion 44 is formed in a tubular shape, and is inserted into the tubular portion 43 d to guide the tubular portion 43 d of the first restricting portion 43.

  As shown in FIGS. 6 and 7, when the coil part 41 is in a power failure state (a state where power is cut off) and the operating part 43b is in a power failure state, the first seal part 2 is at the standby position P1. To position. When the first seal portion 2 is located at the standby position P1, the pair of seal portions 2 and 3 are separated from each other, and therefore, between the pair of pressure-bonding portions 22 and 32 and the pair of pressing portions 23 and 33. An object can be inserted.

  As shown in FIGS. 8 and 9, when the coil portion 41 is in the energized state and the operating portion 43b is in the energized state, the first seal portion 2 is located at the nozzle operating position P3. When the first seal portion 2 is located at the nozzle operation position P3, the pair of pressing portions 23 and 33 can press the object while sandwiching the pair of pressure-bonding portions 22 and 32 apart from each other. The object cannot be pinched.

  As shown in FIG.10 and FIG.11, when the coil part 41 is an energized state and the action | operation part 43b is a power failure state, the 1st seal | sticker part 2 is located in the seal position P2. When the first seal portion 2 is located at the seal position P2, the pair of pressing portions 23 and 33 can press the object while sandwiching the object, and the pair of crimping portions 22 and 32 sandwich the object. Can be crimped.

  Returning to FIGS. 1 to 5, the apparatus main body 5 includes a base portion 51 that accommodates a part of the apparatus, and a pair of base members 51 fixed to the upper portion of the base portion 51 and fixing the second seal body 31 of the second seal portion 3. Second seal fixing portions 52 and 52 and a plate-like driving fixing portion 53 for fixing the coil portion 41 of the solenoid driving portion 4 are provided. The second seal fixing portion 52 is formed in an arm shape, and fixes the end portion of the second seal body 31 at one end portion.

  The drive transmission unit 6 includes a pair of support units 61 and 61 that support the first seal unit 2, a pair of support units 61 and 61 connected to each other, and a connection body 62 that is connected to an end of the movable body 42; Biasing bodies 63, 63 that bias the connection body 62 are provided. The drive transmission unit 6 further includes guide portions 64 and 64 for guiding the connection body 62, and the guide portion 64 is formed in a column shape along the vertical direction and is disposed so as to sandwich the connection body 62. It has.

  The support portion 61 includes an arm-shaped first seal fixing portion 61 a that fixes the first seal body 21 of the first seal portion 2, and a connecting portion 61 b that connects the first seal fixing portion 61 a and the connection body 62. ing. The first seal fixing portion 61a fixes the end portion of the first seal body 21 at one end portion and is rotatably connected to the other end portion of the second seal fixing portion 52 at the other end portion. The connecting portion 61b is rotatably connected to the first seal fixing portion 61a at one end, and is rotatably connected to the end of the connection body 62 at the other end.

  The connection body 62 is rotatably connected to the support portion 61 at an end portion, and is connected to the upper end portion of the movable body 42 at an intermediate portion. The connecting body 62 is configured to be elastically deformed when the first seal portion 2 is positioned at the seal position P2 and to be restored when the solenoid drive portion 4 is powered off. Specifically, the connecting body 62 is long and formed in a flat plate shape, and is configured to bend and elastically deform when the first seal portion 2 is located at the seal position P2. Has been. In the present embodiment, the connection body 62 is made of metal (steel, stainless steel, etc.).

  The urging body 63 is held by the drive fixing portion 53 and is disposed between the drive fixing portion 53 and the connection body 62. The urging body 63 urges a force directed upward with respect to the connection body 62. Specifically, the biasing body 63 biases the connection body 62 so that the first seal portion 2 returns to the standby position P1. It should be noted that the urging force by the urging body 63 is larger than the urging force by the elastic body 43c.

  The input unit 8 includes an activation instructing unit (for example, a switch button) 81 that receives an instruction to seal an object from the user, and the first seal unit 2 or the connecting body in order to output a heating instruction to the heating units 22a and 32a. And a heating instruction section (for example, a micro switch) 82 for detecting that 62 is located at a predetermined position. The input unit 8 includes a temperature detection unit (for example, a temperature sensor) 83 that detects the temperature of the heating unit 32a and a position detection unit (for example, a photoelectric sensor or a proximity sensor) that detects the position of the first seal unit 2 (connector 62). Etc.) 84.

  The configuration of the sealing device 1 according to the present embodiment is as described above. Next, the sealing operation of the sealing device 1 according to the present embodiment will be described.

  In the initial state, as shown in FIGS. 6 and 7, since the coil part 41 is in a power failure state and the operating part 43b is in a power failure state, the first seal part 2 is located at the standby position P1. . And a pair of seal parts 2 and 3 are spaced apart in the up-and-down direction. At this time, the movable body 42 receives the upward force from the urging body 63 while not receiving the force from the coil portion 41. The locking body 43a receives no upward force from the urging body 63 by being hooked on the hook 42c of the movable body 42 while not receiving the force from the operating portion 43b.

  When the activation instruction unit 81 receives an instruction after the object is inserted between the pair of seal portions 2 and 3, the control unit 9 puts the coil unit 41 and the operation unit 43b into an energized state. As a result, as shown in FIGS. 8 and 9, the movable body 42 receives a downward force by the coil portion 41, and thus moves downward against the force of the biasing body 63, while the locking body 43 a Since the upward force is received by the operating portion 43b, the movable body 42 is locked to restrict the movable body 42 from moving downward.

  In this state, since the first seal portion 2 is located at the nozzle operation position P3, the pair of pressing portions 23 and 33 press the object together with the nozzle portion 7. The nozzle unit 7 retracts from between the target object and the pair of seal parts 2 and 3 by retreating after sucking (or supplying) gas to the target object.

  After the nozzle unit 7 is retracted, the control unit 9 switches the operation unit 43b from the energized state to the power failure state. As a result, as shown in FIGS. 10 to 12, the engaging body 43 a is not receiving the force from the operating portion 43 b and the movable body 42 continues to receive the downward force from the coil portion 41. The body 42 and the locking body 43a move downward against the force of the urging body 63. At this time, when the heating instruction unit 82 detects, the control unit 9 heats the heating units 22a and 32a.

  And the solenoid drive part 4 moves the movable body 42 below further, even after a pair of crimping | compression-bonding parts 22 and 32 press-contact. Thereby, when the 1st seal | sticker part 2 is located in the seal position P2, the flat connection body 62 is elastically deformed so that it may curve below. And since the 1st seal | sticker part 2 is located in the sealing position P2, a pair of crimping | compression-bonding parts 22 and 32 are crimped | bonded (thermal welding) on both sides of a target object. Thereafter, the temperature detector 83 detects a predetermined temperature, whereby the sealing of the object is completed.

  After the sealing of the object is completed, the control unit 9 switches the coil unit 41 from the energized state to the power failure state, so that the movable body 42 does not receive the force from the coil unit 41. As a result, the connection body 62 that has been elastically deformed in a curved shape is restored to a linear shape, and therefore the movable body 42 moves upward against the residual magnetism of the solenoid drive unit 4 by its elastic force. And since the connection body 62 receives force by the biasing body 63 and moves upward, the 1st seal | sticker part 2 returns to the standby position P1.

  As described above, according to the sealing device 1 according to the present embodiment, the pair of support portions 61 and 61 support the first seal portion 2 and are connected to the movable body 42 of the solenoid drive unit 4. However, a pair of support parts 61 and 61 are connected. Thereby, the drive of the solenoid drive part 4 is transmitted to the 1st seal | sticker part 2 via the connection body 62 and a pair of support parts 61 and 61. FIG.

  Since the movable body 42 moves when the coil portion 41 of the solenoid drive unit 4 is energized, the first seal portion 2 is subject to the second seal portion 3 from the standby position P1 that is separated from the second seal portion 3. It moves to a sealing position P2 for sealing an object. And when the 1st seal | sticker part 2 is located in the seal position P2, the connection body 62 elastically deforms.

  After that, when the coil unit 41 of the solenoid drive unit 4 fails, the elastically deformed connection body 62 is restored. As a result, the restoring force (elastic force) resists the residual magnetism of the coil portion 41 of the solenoid driving portion 4, so that the movable body 42 smoothly returns to the position before energization and the first seal portion 2 is in the standby position P1. Return to smoothly. Therefore, the 1st seal | sticker part 2 can be operated smoothly.

  Further, according to the sealing device 1 according to the present embodiment, since the connection body 62 is formed in a flat plate shape, the connection body 62 is curved and elastic when the first seal portion 2 is located at the seal position P2. Deform. And when the coil part 41 of the solenoid drive part 4 carries out a power failure, since the connection body 62 restore | recovers reliably, while the movable body 42 returns reliably to the position before electricity supply, the 1st seal | sticker part 2 will be in the standby position P1. It will definitely return.

  The sealing device according to the present invention is not limited to the configuration of the above-described embodiment, and is not limited to the above-described operational effects. It goes without saying that the sealing device according to the present invention can be variously modified without departing from the gist of the present invention. For example, it is needless to say that configurations, methods, and the like according to various modifications described below may be arbitrarily selected and employed in the configurations, methods, and the like according to the above-described embodiments.

  In the sealing device 1 according to the above-described embodiment, the connection body 62 is formed in a flat plate shape and is elastically deformed so as to be curved as a whole. However, the sealing device 1 according to the present invention is not limited to such a configuration. For example, in the sealing device 1 according to the present invention, the connection body 62 may be partially elastically deformed. An example of such a configuration is shown in FIG.

  The connecting body 62 shown in FIG. 13 includes elastic portions 62a, 62a having elasticity, and rigid portions 62b,... Having rigidity higher than the elastic portion 62a. The elastic part 62a is formed to be bent. Moreover, the elastic part 62a is each arrange | positioned in the position outside the said part so that the site | part connected with the movable body 42 in the connection body 62 may be pinched | interposed. According to such a configuration, when the first seal portion 2 is positioned at the seal position P2, the connection body 62 is elastically deformed by the elastic portion 62a.

  Moreover, in the sealing device 1 according to the above-described embodiment, the urging bodies 63 and 63 urge the connecting body 62 upward, whereby the first seal portion 2 returns to the standby position P1. . However, the sealing device 1 according to the present invention is not limited to such a configuration, and in particular, the urging body 63 is not an essential configuration in the present invention. For example, in the sealing device 1 according to the present invention, the first seal portion 2 may return to the standby position P1 by moving by its own weight. An example of such a configuration is shown in FIG.

  The sealing device 1 shown in FIG. 14 has a configuration in which each configuration is arranged upside down with respect to the sealing device 1 according to the above embodiment. According to such a configuration, when the connecting body 62 that has been elastically deformed is restored, the movable body 42 moves downward against the residual magnetism of the solenoid driving unit 4 by its elastic force. And since the connection body 62 moves below by dead weight, the 1st seal | sticker part 2 also returns to the standby position P1 by moving below.

  Moreover, in the sealing device 1 according to the above-described embodiment, the first seal portion 2 is configured to rotate, that is, move to each position P1, P2, P3 by an arcuate track. However, the sealing device 1 according to the present invention is not limited to such a configuration. For example, in the sealing device 1 according to the present invention, the first seal portion 2 moves along a predetermined direction (for example, the moving direction of the movable body 42), that is, each position P1, P2, by a linear track. It may be configured to move to P3.

  In the sealing device 1 according to the above-described embodiment, only the first seal portion 2 is moved by being driven by the solenoid drive portion 4. However, the sealing device 1 according to the present invention is not limited to such a configuration. For example, the sealing device 1 according to the present invention may be configured such that both the first and second seal portions 2 and 3 are moved by being driven by the solenoid driving portion 4.

  Moreover, in the sealing apparatus 1 which concerns on the said embodiment, it is the structure that the nozzle part 7 is provided and the 1st seal part 2 is located in the nozzle operation position P3. However, the sealing device 1 according to the present invention is not limited to such a configuration, and in particular, the nozzle portion 7 is not an essential configuration in the present invention. For example, in the sealing device 1 according to the present invention, the nozzle portion 7 is not provided, and the first seal portion 2 moves only to the two positions of the standby position P1 and the seal position P2. It may be configured.

  Further, in the sealing device 1 according to the present invention, the connection body 62 may be connected to the support portion 61 (directly connected), and the connection body 62 interposes a link member or the like. In this case, the support unit 61 may be connected (indirectly connected).

  Further, in the sealing device 1 according to the present invention, the connection body 62 may be connected to the movable body 42 (directly connected), and the connection body 62 interposes a link member or the like. Thus, a configuration in which the movable body 42 is connected (indirectly connected) may be employed.

  Moreover, the sealing device 1 according to the present invention includes a transport device that transports an object, and the transport device continuously transports the object between the pair of seal portions 2 and 3, and the pair of seal portions 2 and 2. 3 may be configured to seal the conveyed object. In short, the sealing device 1 according to the present invention may have a configuration in which an object is manually arranged between the pair of seal portions 2, 3 or a configuration in which the object is automatically arranged between the pair of seal portions 2, 3. .

  Further, the sealing device 1 according to the present invention may be configured to include a suppression device that suppresses sound and vibration generated when the connecting body 62 that has been elastically deformed is restored. For example, examples of the suppression device include a shock absorber, a damper, a soundproof sheet, or a cover provided with a soundproof wall.

  Further, the sealing device 1 according to the present invention may be configured to include a measuring tool for measuring the deformation amount of the connecting body 62 that is elastically deformed. For example, a gauge etc. are mentioned as a measuring tool. According to such a configuration, by measuring the deformation amount of the connecting body 62, the pressure value at which the pair of seal portions 2 and 3 press the object can be measured (calculated). The deformation amount may be automatically input to the control unit 9, the control unit 9 may calculate the pressure value, and the display device (for example, display) may display the calculated pressure value.

DESCRIPTION OF SYMBOLS 1 ... Sealing device, 2 ... 1st sealing part, 3 ... 2nd sealing part, 4 ... Solenoid drive part, 5 ... Apparatus main body, 6 ... Drive transmission part, 7 ... Nozzle part, 8 ... Input part, 9 ... Control part 22 ... 1st crimping part, 22a ... 1st heating part, 23 ... 1st press part, 24 ... Mounting mechanism, 24a ... Elastic body, 31 ... 2nd sealing body, 32 ... 2nd crimping part, 32a ... 2nd Heating part 33 ... second pressing part 41 ... coil part 42 ... movable body 42a ... movable main body part 42b ... insertion part 42c ... hook 43 ... first regulating part 43a ... locking body 43b ... Actuating part, 43c ... elastic body, 43d ... cylindrical part, 43e ... hole, 44 ... second regulating part, 51 ... base part, 52 ... second seal fixing part, 53 ... drive fixing part, 61 ... support part, 61a ... first seal fixing part, 61b ... coupling part, 62 ... connection body, 62a ... elastic part, 62b ... rigid part, 6 ... urging member, 64 ... guide portion, 81 ... start instructing unit, 82 ... heating instruction unit, 83 ... temperature detecting unit, 84 ... position detection unit, P1 ... standby position, P2 ... sealing position, P3 ... nozzle operating position

Claims (2)

First and second seal portions for sealing with an object interposed therebetween;
A movable body that moves linearly when energized, and the movable body is moved to move the first seal portion from the standby position away from the second seal portion to the second seal portion. A solenoid drive unit for moving the seal to a seal position for sealing,
A drive transmission unit that transmits the drive of the solenoid drive unit to the first seal unit;
The drive transmission portion includes a pair of support portions that support the first seal portion, and a connection body that connects the pair of support portions and is connected to the movable body,
The connecting device is a sealing device that is elastically deformed when the first seal portion is positioned at the seal position so that the connection is restored when the solenoid drive unit is interrupted. The sealing device according to claim 1, wherein the connection body is formed in a flat plate shape so as to be bent and elastically deformed.

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