JP6300857B2 - Vacuum apparatus and appliance for vacuum apparatus - Google Patents

Description

  The present invention includes a male pipe joint portion extending from a vacuum passage to which a vacuum pressure is applied, and the male pipe joint portion provided with a required vacuum device instrument such as a vacuum suction pad in the male pipe joint portion. The present invention relates to a vacuum device that is used by removably fitting a part. Note that the vacuum apparatus according to the present invention is assumed not only to be set at a normal atmospheric pressure but also to be set in an atmosphere in an extremely high pressure state. The vacuum device according to the present invention is capable of performing the required function of the present invention in a state where a pressure lower than the ambient air pressure around the vacuum device is generated. Accordingly, in the present invention, the ambient air pressure around which the vacuum apparatus according to the present invention is placed is referred to as “outside air pressure”, and the pressure lower than “outside air pressure” is referred to as “vacuum pressure”.

  Various vacuum devices are known in which articles are sucked and transferred or fixed (see, for example, Patent Documents 1 and 2). In such an apparatus, an opening communicating with the atmosphere is provided in a vacuum passage to which a vacuum pressure is applied, and a required vacuum device instrument such as a vacuum suction pad is attached to the opening. In such a vacuum apparatus, it is necessary to replace the vacuum apparatus tool due to wear or to replace it with a vacuum apparatus tool suitable for the work contents. Further, in a vacuum apparatus having a plurality of openings, it may be necessary to attach a closing member to an opening that is not necessary depending on the work contents and close it.

Japanese Patent Laying-Open No. 2015-196229 JP 2013-039644 A

  Therefore, it is desired that such a vacuum device instrument can be easily attached and detached and that the attached vacuum device instrument is not inadvertently removed.

  An object of the present invention is to provide a vacuum apparatus provided with means for satisfying such a technical problem, in particular, a vacuum apparatus instrument that is detachably attached to the vacuum apparatus.

That is, the present invention
A vacuum apparatus including a vacuum passage to which a vacuum pressure is applied, and a vacuum including a female pipe joint portion detachably coupled to a cylindrical male pipe joint portion of the vacuum apparatus provided in communication with the vacuum passage. An instrument for the device,
The female pipe joint is
A cylindrical body fitted to the male pipe joint;
A locking element provided on the cylindrical body so as to be displaceable in a radial direction, wherein the cylindrical body and the male pipe joint are engaged with the male pipe fitting portion fitted to the cylindrical body. It is possible to displace between a locking position for connecting and fixing the part and an unlocking position for releasing the connection and fixing between the tubular body and the male pipe joint part by moving radially outward from the locking position. Lockers,
An unlocking preventing position provided so as to be displaceable in the longitudinal axis direction of the cylindrical body along the outer peripheral surface of the cylindrical body, and preventing the locking element at the locking position from being displaced to the unlocking position; A locking element restraining member that is displaceable between an unlocking allowable position that is displaced in the longitudinal axis direction from the unlocking preventing position and allows the locking element to be in the unlocking position;
The vacuum device appliance further includes:
When the cylindrical body has a surface for receiving an external air pressure around the vacuum device and a surface for receiving the vacuum pressure, and a predetermined vacuum pressure is applied to the vacuum passage. , The displacement restrained state of preventing the displacement of the locking element restraining member that is displaced by the external pressure and is displaced from the unlocking prevention position toward the unlocking allowable position,
In a state in which no vacuum pressure is applied to the vacuum passage, the displacement due to the external air pressure is released, and the lock is made to be in a displacement permissible state that allows the locker restraining member to enter the unlocking permitted position. Provided is a vacuum apparatus tool comprising a securing member.

  This appliance for a vacuum apparatus can be easily attached to and detached from the vacuum apparatus only by fitting / disconnecting the female pipe joint to / from the male pipe joint of the vacuum apparatus. Further, while the vacuum pressure is being applied to the vacuum passage, the locking securing member is in a displacement-prevented state, and the attachment of the vacuum device tool to the vacuum device can be safely secured.

In particular,
A first opening end where the cylindrical body receives the male pipe joint, a second opening end on the opposite side, and a passage portion communicating the first opening end and the second opening end. Have
The locking securing member is
A pressure receiving displacement member provided on the second opening end side in the passage portion so as to be displaceable in the longitudinal axis direction, the pressure receiving displacement member having a cross section for sealing the passage portion, and a surface receiving the external air pressure On the second opening end side, a pressure receiving displacement member having a cross section in which a surface receiving the vacuum pressure is provided on the first opening end side;
An engagement element provided in a radial hole provided in the peripheral wall of the cylindrical body and displaceable in the radial direction;
When the locking securing member is in the displacement-preventing state, the pressure receiving displacement member is displaced toward the first opening end by the external air pressure to displace the engagement element radially outward, and the engagement element is the locking element. Holding the locking element restraining member in the unlocking prevention position by engaging with the child restraining member;
When in the displacement allowable state, the pressure receiving displacement member is displaced in the direction of the second opening end and the engagement element is displaced inward in the radial direction, and the locking element restraining member is unlocked from the unlocking prevention position. It can be made to be displaceable to an allowable position.

More specifically,
The pressure-receiving displacement member has a cylindrical portion that extends from the transverse portion toward the first opening end and is slidable with an inner peripheral surface of the peripheral wall that defines the passage portion. A pressing surface portion that causes the outer peripheral surface to press the engaging element radially outward to engage the locking element restraining member, and allows the engaging element to be displaced radially inward to restrict the locking element. A concave portion that allows the member to be displaced from the unlocking prevention position to the unlocking allowable position, and is provided to be continuous with the outer peripheral surface in the circumferential direction at a position closer to the first opening end than the concave surface. It is possible to have an annular seal member that sealingly engages with the inner peripheral surface of the peripheral wall.

As another specific example,
The pressure-receiving displacement member has a mounting protrusion that protrudes toward the first opening end at a radial center position of the transverse portion, and is sealed and fixed around the mounting protrusion and extends radially outward. An annular seal member that is hermetically fixed to the inner peripheral surface on the first opening end side of the peripheral wall of the peripheral wall, wherein the pressure-receiving displacement member is in the longitudinal axis direction with respect to the cylindrical body It is possible to have an annular sealing member having elasticity that allows displacement.

In yet another example,
A first opening end where the cylindrical body receives the male pipe joint, a second opening end on the opposite side, and a passage portion communicating the first opening end and the second opening end. Have
The locking securing member is
An engagement element provided in a radial hole provided in the peripheral wall of the cylindrical body and displaceable in the radial direction;
A pressure receiving displacement member having an internal passage that is provided on the second opening end side in the passage portion so as to be displaceable along the longitudinal axis and communicates the first opening end portion and the second opening end portion. And an outer peripheral surface that is slidably engaged with an inner peripheral surface of the peripheral wall of the cylindrical body that defines the passage portion, and the outer peripheral surface is on the second opening end side with respect to the large-diameter portion and the large-diameter portion. A small-diameter portion, and the large-diameter portion and the small-diameter portion are slidably engaged with the corresponding large-diameter portion and the corresponding small-diameter portion of the inner peripheral surface of the peripheral wall, each having a corresponding diameter. And the large-diameter portion has a pressing surface portion that is a radially outer position that prevents the locking element restraining member from being displaced from the unlocking prohibition position to the unlocking allowable position, and the engagement element includes: A concave surface that allows the locking element restraining member to be displaced from the unlocking prevention position to the unlocking permission position by allowing displacement from the radially outer position to the radial inner side. A pressure receiving displacement member with bets,
A first annular seal member provided on the outer circumferential surface of the pressure receiving displacement member so as to be continuous in the circumferential direction at a position closer to the first opening end than the concave surface portion of the outer circumferential surface, The inner peripheral surface of the peripheral wall is in sealing sliding engagement with the corresponding large-diameter portion, and is adapted to receive an external air pressure through the radial hole of the peripheral wall on the surface on the second opening end side. A first annular seal member,
A second annular seal member provided to be continuous with the small diameter portion in the circumferential direction, and is configured to be in sliding sliding engagement with the corresponding small diameter portion of the inner peripheral surface of the peripheral wall; The surface of the first opening end side is adapted to receive the external air pressure through the radial hole of the peripheral wall, and is viewed in the longitudinal axis direction of the surface of the first opening end side receiving the external air pressure. A second annular seal member having an area smaller than the area seen in the longitudinal axis direction of the surface on the second opening end side of the first annular seal member receiving the external air pressure;
Have
In a state where a vacuum pressure is applied to the vacuum passage and the tube member while a tubular member communicating with the passage portion is connected to the second opening end portion, the first annular seal member and the second annular seal member The pressure receiving displacement member is biased toward the first opening end due to the difference in the external air pressure received by the pressure receiving member, and the pressing surface of the outer peripheral surface of the pressure receiving displacement member causes the engagement element to be positioned at the radially outer position. To be able to.

  In the above specific example, it is possible to have a biasing member that biases the pressure receiving displacement member toward the second opening end.

In yet another specific example,
The locking securing member is a member that is provided in a radial hole provided in a peripheral wall of the cylindrical body and is displaceable in the radial direction, and is sucked by the vacuum pressure applied to the cylindrical body and has a radius The locking element restraining member located in the direction of the unlocking position is prevented from returning to the unlocking allowable position, and when the vacuum pressure is not applied, the locking element restraining member is displaced outward in the radial direction. It can be displaced to the unlocking allowable position.

In this case, a biasing member that biases the locking securing member radially outward toward the unlocking allowable position can be provided.

The present invention further includes the above-mentioned various types of vacuum device instruments,
There is provided a vacuum apparatus adapted to be used by detachably fitting and coupling the apparatus for a vacuum apparatus to a male pipe joint section extending from a vacuum passage to which a vacuum pressure is applied. .

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a pipe joint according to the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a vertical cross-sectional view of a vacuum pipe device provided with a male pipe joint portion attached to the vacuum apparatus according to the present invention and a female pipe joint section detachably attached to the male pipe joint portion. An example is shown in which the instrument is a closing cap that closes the male pipe joint and blocks the vacuum passage of the vacuum device from the outside air. It is a longitudinal cross-sectional view which shows the state which attached the instrument for vacuum devices as a closure cap to the male pipe joint part of FIG. 1, and shows the state in which the vacuum pressure is not applied. FIG. 3 is a view similar to FIG. 2 and shows a state in which a vacuum pressure is applied. It is a longitudinal cross-sectional view which shows other embodiment of the instrument for vacuum devices which concerns on this invention, The tubular member, such as a suction pad, is connected with the right end of the said member, and the vacuum pressure is applied to this tubular member Show. It is a longitudinal cross-sectional view which shows another embodiment of the instrument for vacuum devices which concerns on this invention. FIG. 5 shows the relationship between the locking element restraining member in the vacuum device instrument of FIG. 5 and the locking securing member for holding the locking element restraining member in the unlocking prevention position as seen along the line IV-IV in FIG. FIG. It is a longitudinal cross-sectional view which shows another embodiment of the instrument for vacuum devices which concerns on this invention.

  In the first embodiment shown in FIGS. 1 to 3, a vacuum device instrument 12 removably attached to a male fitting 10 extending from a vacuum passage of a vacuum device (not shown) blocks the vacuum passage from outside air. Shown as a closure cap. That is, the vacuum device instrument 12 includes a cylindrical body 14 fitted to the male pipe joint portion 10 and a lock 16 provided on the cylindrical body 14 so as to be displaceable in the radial direction. As shown in FIG. 4, the cylindrical body 14 and the male pipe joint portion 10 are connected and fixed by engaging with a locking recess 18 formed on the outer surface of the male pipe joint portion 10 to which the cylindrical body 14 is fitted. It is possible to displace between the locking position and the unlocking position in which the cylindrical body 14 and the male pipe joint portion 10 are released from the locking recess 18 by being displaced radially outward from the locking position. The locking element 16 is provided so as to be displaceable in the longitudinal axis direction of the cylindrical body 14 along the outer peripheral surface of the cylindrical body 14, and the locking element 16 at the locking position is displaced radially outward and Displacement to the left as seen in the longitudinal axis view from the unlocking prevention position shown in the figure to prevent A locker restraining member 20 (in the illustrated example, a cylindrical sleeve) 20 that is displaceable between an unlocking allowable position that allows the locker 16 to be displaced radially outward to the unlocked position. Have

The vacuum device instrument 12 further includes a locking securing member 30. When a vacuum pressure is applied to the vacuum passage, the lock securing member 30 is displaced by the external air pressure around the vacuum device instrument 12, and the lock restraining member 20 is moved from the unlocking prevention position to the unlocking allowable position. In a state of preventing displacement (FIG. 3) that prevents the head from being displaced in the opposite direction, when the vacuum pressure is not applied to the vacuum passage, the displacement due to the external air pressure is released and the locker restraining member 20 becomes the unlocking permitted position. The displacement is allowed to be allowed.

Specifically, the cylindrical body 14 includes a first opening end portion 22 that receives the male pipe joint portion 10, a second opening end portion 24 on the opposite side, a first opening end portion 22, and a second opening end portion. The locking securing member 30 is a pressure receiving displacement member 32 provided on the second opening end portion 24 side in the passage portion 26 so as to be displaceable in the longitudinal axis direction. A cross section 34 having a cross-section for sealing the passage portion 26, the surface receiving the external air pressure provided on the second opening end side, and the surface receiving the vacuum pressure on the first opening end side, A pressure-receiving displacement member 32 having a cylindrical portion 38 that extends from the first opening end 22 side to the inner peripheral surface of the peripheral wall 36 of the cylindrical body 14 that defines the passage portion 26 and is slidable. And an engagement element 42 that is provided in a radial hole 40 provided in the peripheral wall 36 of the fourteen walls and is displaceable in the radial direction. When the locking securing member 30 is in the above-described displacement prevention state, the pressure receiving displacement member 32 is displaced toward the first opening end 22 by the external air pressure, and the engaging element 42 is displaced radially outward, as shown in FIG. Furthermore, when the engaging element 42 is engaged with the locking element restraining member 20, the locking element restraining member 20 is held at the unlocking prevention position shown in the figure, and when the locking securing member 30 is in the above-described displacement allowable state. The pressure receiving displacement member 32 is displaced in the direction of the second opening end portion 24 and the engaging element 42 is displaced inward in the radial direction. To allow the above-mentioned unlocking allowable position.

On the outer peripheral surface of the cylindrical portion 38 of the pressure receiving displacement member 32, a pressing surface portion 44 that presses the engaging element 42 radially outward to engage the locker restraining member 20, and the engaging element 42 is radially inward. A concave portion 46 that allows the locker restraining member 20 to be displaced leftward from the unlocking prevention position (FIG. 3) to the left when viewed in the figure and to allow the above-described unlocking allowable position. A seal mounting groove 48 provided annularly in the circumferential direction at a position closer to the first opening end 22 than the concave surface 46, and an inner periphery of the peripheral wall 36 of the cylindrical body 14 fitted in the seal mounting groove 48 An annular seal member 50 is provided which is adapted to sealingly engage the surface.

  In the above-described embodiment, the locking element restraining member 20 is urged rightward by the urging member (coil spring) 52 toward the illustrated unlocking prevention position that holds the locking element 16 from the outside in the radial direction. The urging member (coil spring) 54 is urged to the position shown in FIGS. 1 and 2 so that the locking securing member 30 is allowed to be displaced. When attaching the vacuum device instrument 12 to the male pipe joint 10 of the vacuum device, the lock restraint member 20 is displaced to the left as seen in the figure to remove the lock 16 and The locker restraining member 20 is returned to the position shown in FIG. 2 in a state where the locker 16 is fitted in the mold pipe joint part 10 and the locker 16 is fitted in the lock recess 18 of the male pipe joint part 10. In this state, when a vacuum pressure is applied to the vacuum passage of the vacuum device, the pressure receiving displacement member 32 is displaced rightward as seen in the figure by the external air pressure, and presses the engaging element 42 radially outward as shown in FIG. The locker restraining member 20 is not in a state of releasing the locker 16 unless the locker restraining member 20 is engaged with the locker restraining member 20 in the release preventing position and the vacuum pressure is released. When the vacuum pressure is released, the pressure receiving displacement member 32 can be displaced leftward from the position shown in FIG. 3, and the vacuum device instrument 12 can be removed from the male pipe joint portion 10. In this embodiment, the lock 16 is a spherical member set in a radial hole formed in the peripheral wall 36 of the cylindrical body 14, but may be of a so-called collet chuck type. Projecting from the left end surface of the pressure receiving displacement member 32 is a grip 56 that is held by an operator when the pressure receiving displacement member 32 is removed from the cylindrical body 14 in a vacuum pressure released state.

  The vacuum device instrument 60 according to the second embodiment shown in FIG. 4 has a configuration substantially similar to that of the first embodiment, and the same or corresponding members are denoted by the same reference numerals. It is shown. In this embodiment, a female screw 62 is formed on the inner peripheral surface of the cylindrical body 40 from the second opening end 24 toward the first opening end 22, and an annular member is formed on the right end of the female screw 62. 64 is fixed and a small-diameter inner peripheral surface (corresponding small-diameter portion in the claims: hereinafter “corresponding small-diameter portion”) 66 is formed on the cylindrical body 14, and the inner peripheral surface of the peripheral wall 36 of the cylindrical body 14 is formed. The right side of the annular member 64 is a large-diameter inner circumferential surface (corresponding large-diameter portion in the claims: hereinafter “corresponding large-diameter portion”) 68 with respect to the small-diameter inner circumferential surface 66.

  The pressure receiving displacement member 32 of the locking securing member 30 has a cylindrical shape that allows the first opening end portion 22 and the second opening end portion 24 to communicate with each other, and the corresponding small diameter portion 66 and the corresponding large diameter portion 68 are formed on the outer peripheral surface thereof. Corresponding small-diameter portions 70 and large-diameter portions 72 are formed, and are respectively slidably engaged with the corresponding small-diameter portions 66 and the corresponding large-diameter portions. The large-diameter portion 72 is provided with a first annular seal member 50a in the first seal mounting groove 48a that is closer to the first opening end portion 22 than the concave surface portion 46, and the small-diameter portion 70 has a second seal mounting groove 48b. The second annular seal member 50b is fitted and the first annular seal member 50a and the second annular seal member 50b are in sliding sliding engagement with the corresponding large diameter portion 68 and the corresponding small diameter portion 66 of the cylindrical body 14, respectively. It is made to do.

  The first annular seal member 50a receives the external air pressure through the radial hole 40 provided in the peripheral wall 36 of the cylindrical body 14 and the gap communicating therewith on the surface on the second opening end 24 side. The second annular seal member 50b is adapted to receive the external air pressure through the radial hole 40 and the gap communicating therewith on the surface on the first opening end 22 side, and the second annular seal member 50b The area of the surface on the side of the first opening end that receives the external air pressure in the longitudinal axis direction (of the cylindrical body 14) is the same length of the surface on the side of the second opening end that receives the external air pressure of the first annular seal member. It is smaller than the area seen in the axial direction. By setting the pressure receiving area for receiving the external air pressure in this manner, a tubular member such as a vacuum air suction pad is screwed onto the female screw 62 and applied to the second opening end 24 so as to apply a vacuum pressure. In the state, the pressure receiving displacement member 32 is urged toward the first opening end portion 22 due to the difference in external air pressure received by the first annular seal member 50a and the second annular seal member 50b. The pressing surface 44 is configured such that the locking securing member 30 is in a displacement-preventing state with the engaging element 42 positioned radially outward.

  The vacuum device instrument 80 according to the third embodiment shown in FIGS. 5 and 6 is generally similar to the first embodiment in the form of a closing cap that blocks the vacuum passage from the outside air as in the first embodiment. The same or corresponding members are denoted by the same reference numerals. That is, in the vacuum device instrument 80, the sealing member 82 for sealing the second opening end 24 is provided at the second opening end 24 of the cylindrical body 14, and the male pipe joint of the vacuum device is provided. When the vacuum pressure is applied to the cylinder 10, the vacuum pressure is applied to the cylindrical body 14. A big difference compared with the above-mentioned embodiment exists in the pressure receiving displacement member 32 which comprises a locking ensuring member. The pressure-receiving displacement member 32 is provided in a radial hole 36a provided in the peripheral wall 36 of the cylindrical body 14 so as to be displaceable in the radial direction, and provided at an outer end portion of the small diameter portion 32a. The large-diameter portion 32b is provided, and the displacement allowable position shown in the drawing, which is pressed radially outward by a biasing member (coil spring) 84, and the vacuum pressure is applied to the cylindrical body 14, thereby causing the radial direction. The large-diameter portion 32b is displaced inward so that the large-diameter portion 32b can be displaced between a displacement prevention position in contact with the outer peripheral surface of the cylindrical body 14. As can be seen from FIGS. 5 and 6, the end 20 a of the cylindrical locker restraining member 20 is formed with a recess 20 b having a size for receiving the small diameter portion 32 b of the pressure receiving displacement member 32. When in the displacement allowable position shown in FIG. 5, the concave portion 20b can be displaced to the left as viewed in the figure so as to be fitted to the small diameter portion 32a of the pressure receiving displacement member 32 to be the unlocking allowable position. When the member 32 is retracted by the vacuum pressure to reach the displacement preventing position, the end edge 20a of the locker restraining member 20 is engaged with the large diameter portion of the pressure receiving displacement member 32 so that it cannot be displaced to the release allowable position. It has become.

  The vacuum device instrument 90 according to the fourth embodiment shown in FIG. 7 is substantially the same as that of the first embodiment shown in FIGS. 1 to 3 although there are structural differences. The same or corresponding members are indicated with the same reference numerals. That is, in this vacuum device instrument 90, the pressure receiving displacement member 32 has the mounting protrusion 34a protruding toward the first opening end 22 at the radial center position of the transverse portion 34, and is sealed around the mounting protrusion 34a. An annular seal member 50a that is fixed and extends outward in the radial direction is hermetically fixed to the inner peripheral surface on the first opening end portion 22 side with respect to the radial hole 40 of the peripheral wall 36 of the cylindrical body 14. The cylindrical body 14 includes a first opening end side portion 14a and a second opening end side portion 14b that are screwed to each other, and the outer peripheral edge of the annular seal member 50a is the first and second opening ends. It is sandwiched between the side portions 14a and 14b. The annular seal member 50a is composed of a sheet-like member having elasticity, and allows the pressure receiving displacement member 32 to be displaced in the longitudinal axis direction with respect to the cylindrical body 14 in order to displace the engagement element 40 in the radial direction. It is like that. The tubular seal member 50a is substantially different from the tubular seal member 50 in the first embodiment, but has substantially the same function as the seal member.

  While the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, the lock 16 has a spherical shape as described above, but may be a so-called collet chuck type.

Vacuum equipment 12
Tubular body 14
1st opening edge part side part 14a
Second opening end side portion 14b
Locking recess 18
Locking element restraining member (sleeve) 20
First open end 22
Second opening end 24
Passage section 26
Locking securing member 30
Pressure receiving displacement member 32
Crossing 34
Mounting protrusion 34a
Perimeter wall 36
Tubular part 38
Radial hole 40
Engagement element 42
Pressing surface portion 44
Concave surface 46
Seal mounting groove 48
First seal mounting groove 48a
Second seal mounting groove 48b
Annular seal member 50
First annular seal member 50a
Second annular seal member 50b
Biasing member (coil spring) 52
Biasing member (coil spring) 54
Grip 56
Vacuum equipment 60
Female thread 62
Annular member 64
Small-diameter inner peripheral surface (corresponding small-diameter portion in claims) 66
Large-diameter inner peripheral surface (corresponding large-diameter portion in claims) 68
Small diameter part 70
Large diameter part 72
Vacuum equipment 80
Vacuum equipment 90
Sealing member 82
Biasing member (coil spring) 84

Claims (9)

A vacuum apparatus including a vacuum passage to which a vacuum pressure is applied, and a vacuum including a female pipe joint portion detachably coupled to a cylindrical male pipe joint portion of the vacuum apparatus provided in communication with the vacuum passage. An instrument for the device,
The female pipe joint is
A cylindrical body fitted to the male pipe joint;
A locking element provided on the cylindrical body so as to be displaceable in a radial direction, wherein the cylindrical body and the male pipe joint are engaged with the male pipe fitting portion fitted to the cylindrical body. It is possible to displace between a locking position for connecting and fixing the part and an unlocking position for releasing the connection and fixing between the tubular body and the male pipe joint part by moving radially outward from the locking position. Lockers,
An unlocking preventing position provided so as to be displaceable in the longitudinal axis direction of the cylindrical body along the outer peripheral surface of the cylindrical body, and preventing the locking element at the locking position from being displaced to the unlocking position; A locking element restraining member that is displaceable between an unlocking allowable position that is displaced in the longitudinal axis direction from the unlocking preventing position and allows the locking element to be in the unlocking position;
The vacuum device appliance further includes:
When the cylindrical body has a surface for receiving an external air pressure around the vacuum device and a surface for receiving the vacuum pressure, and a predetermined vacuum pressure is applied to the vacuum passage. , The displacement restrained state of preventing the displacement of the locking element restraining member that is displaced by the external pressure and is displaced from the unlocking prevention position toward the unlocking allowable position,
In a state in which no vacuum pressure is applied to the vacuum passage, the displacement due to the external air pressure is released, and the lock is made to be in a displacement permissible state that allows the locker restraining member to enter the unlocking permitted position. An instrument for a vacuum apparatus, comprising a securing member. A first opening end where the cylindrical body receives the male pipe joint, a second opening end on the opposite side, and a passage portion communicating the first opening end and the second opening end. Have
The locking securing member is
A pressure receiving displacement member provided on the second opening end side in the passage portion so as to be displaceable in the longitudinal axis direction, the pressure receiving displacement member having a cross section for sealing the passage portion, and a surface receiving the external air pressure A pressure receiving displacement member having a transverse part provided on the side of the first opening end, the surface receiving the vacuum pressure on the side of the opening end;
An engagement element provided in a radial hole provided in the peripheral wall of the cylindrical body and displaceable in the radial direction;
When the locking securing member is in the displacement-preventing state, the pressure receiving displacement member is displaced toward the first opening end by the external air pressure to displace the engagement element radially outward, and the engagement element is the locking element. Holding the locking element restraining member in the unlocking prevention position by engaging with the child restraining member;
When in the displacement allowable state, the pressure receiving displacement member is displaced in the direction of the second opening end and the engagement element is displaced inward in the radial direction, and the locking element restraining member is unlocked from the unlocking prevention position. The instrument for a vacuum apparatus according to claim 1, wherein the instrument is displaceable to an allowable position.   The pressure-receiving displacement member has a cylindrical portion that extends from the transverse portion toward the first opening end and is slidable with an inner peripheral surface of the peripheral wall that defines the passage portion. A pressing surface portion that causes the outer peripheral surface to press the engaging element radially outward to engage the locking element restraining member, and allows the engaging element to be displaced radially inward to restrict the locking element. A concave surface portion that allows the member to be displaced from the unlocking prevention position to the unlocking allowable position, and is provided to be continuous with the outer peripheral surface in the circumferential direction at a position closer to the first opening end than the concave surface portion. The instrument for a vacuum device according to claim 2, further comprising an annular seal member that is in sliding and sliding engagement with the inner peripheral surface of the peripheral wall.   The pressure-receiving displacement member has a mounting protrusion that protrudes toward the first opening end at a radial center position of the transverse portion, and is sealed and fixed around the mounting protrusion and extends radially outward. An annular seal member that is hermetically fixed to the inner peripheral surface on the first opening end side of the peripheral wall of the peripheral wall, wherein the pressure-receiving displacement member is in the longitudinal axis direction with respect to the cylindrical body The apparatus for a vacuum apparatus according to claim 2, further comprising an annular seal member having elasticity that allows displacement at a position. A first opening end where the cylindrical body receives the male pipe joint, a second opening end on the opposite side, and a passage portion communicating the first opening end and the second opening end. Have
The locking securing member is
An engagement element provided in a radial hole provided in the peripheral wall of the cylindrical body and displaceable in the radial direction;
A pressure receiving displacement member having an internal passage that is provided on the second opening end side in the passage portion so as to be displaceable along the longitudinal axis and communicates the first opening end portion and the second opening end portion. And an outer peripheral surface that is slidably engaged with an inner peripheral surface of the peripheral wall of the cylindrical body that defines the passage portion, and the outer peripheral surface is on the second opening end side with respect to the large-diameter portion and the large-diameter portion. A small-diameter portion, and the large-diameter portion and the small-diameter portion are slidably engaged with the corresponding large-diameter portion and the corresponding small-diameter portion of the inner peripheral surface of the peripheral wall, each having a corresponding diameter. The large-diameter portion includes a pressing surface portion configured to prevent the locking element restraining member from displacing from the unlocking prevention position to the unlocking allowable position, and a pressing surface portion that has a radially outer position. A concave surface that allows the locking element restraining member to be displaced from the unlocking prevention position to the unlocking permission position by allowing displacement from the radially outer position to the radial inner side. A pressure receiving displacement member with bets,
A first annular seal member provided on the outer circumferential surface of the pressure receiving displacement member so as to be continuous in the circumferential direction at a position closer to the first opening end than the concave surface portion of the outer circumferential surface, The inner peripheral surface of the peripheral wall is in sealing sliding engagement with the corresponding large-diameter portion, and is adapted to receive an external air pressure through the radial hole of the peripheral wall on the surface on the second opening end side. A first annular seal member,
A second annular seal member provided to be continuous with the small diameter portion in the circumferential direction, and is configured to be in sliding sliding engagement with the corresponding small diameter portion of the inner peripheral surface of the peripheral wall; The surface of the first opening end side is adapted to receive the external air pressure through the radial hole of the peripheral wall, and is viewed in the longitudinal axis direction of the surface of the first opening end side receiving the external air pressure. A second annular seal member having an area smaller than the area seen in the longitudinal axis direction of the surface on the second opening end side of the first annular seal member receiving the external air pressure;
Have
In a state in which a vacuum pressure is applied to the vacuum passage and the tube member in a state where the tube member communicating with the passage portion is connected to the second opening end portion, the first annular seal member and the second annular seal member The pressure receiving displacement member is biased toward the first opening end due to the difference in the external air pressure received by the pressure receiving member, and the pressing surface of the outer peripheral surface of the pressure receiving displacement member causes the engagement element to be positioned at the radially outer position. The instrument for a vacuum device according to claim 1, which is adapted to be used.   The instrument for a vacuum apparatus according to any one of claims 2 to 5, further comprising a biasing member that biases the pressure receiving displacement member toward the second opening end.   The locking securing member is a member that is provided in a radial hole provided in a peripheral wall of the cylindrical body and is displaceable in the radial direction, and is sucked by the vacuum pressure applied to the cylindrical body and has a radius The locking element restraining member located in the direction of the unlocking position is prevented from returning to the unlocking allowable position, and when the vacuum pressure is not applied, the locking element restraining member is displaced outward in the radial direction. The instrument for a vacuum device according to claim 1, wherein the device is displaceable to an unlocking allowable position.   The instrument for a vacuum device according to claim 7, further comprising a biasing member that biases the locking securing member radially outward toward the unlocking allowable position. A vacuum device instrument according to any one of claims 1 to 8,
A vacuum apparatus adapted to be used by removably fitting and connecting the female pipe joint part to a male pipe joint part extending from a vacuum passage to which a vacuum pressure is applied.

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