JP3202685B2 - Head unit for pressure vessel inspection and pressure vessel inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting a pressure vessel for retightening a valve of a pressure vessel such as a beer barrel collected from a market, and inspecting the internal pressure of the pressure vessel to detect a defective valve. Things.

[0002]

2. Description of the Related Art Conventionally, pressure vessels such as beer barrels are collected from the market and reused. Before the pressure vessel recovered from the market is reused, the pressure vessel is inspected for looseness of the valve (lid) or deterioration of the valve seal.

Normally, in a keg beer filling line, as a device for checking the performance of a pressure vessel, a valve retightening device and an internal pressure inspection device are installed before and after an outer washing machine and an inner washing machine. However, the internal pressure inspection device is always placed before the internal washing machine.

[0004] In the retightening device, the head is lowered to fit the claw portion into the valve lid, the torque is controlled using a torque limiter, a powder clutch or the like by using a rotational driving force of a nut runner, a motor, or the like, and regulated. The valve was tightened with torque. If the retightening process takes too much time to retighten the valve, it is rejected as a pressure vessel in which there is a possibility that the packing or screws of the valve may be abnormal.

On the other hand, an internal pressure inspection device (residual pressure inspection device)
With the head lowered and in close contact with the valve surface, the seal packing is pushed down to take out the internal pressure of the pressure vessel, and an inspection is performed by monitoring the internal pressure with a sensor. Pressure vessels that do not have pressure during the residual pressure test are rejected. If the packing or screws on the lid are incorrect and the sealing performance is abnormal, or if there is a risk that foreign matter (such as cigarette butts) may have been placed in the barrel after the lid has been opened in the market, Since the pressure is low, it is found by a residual pressure test.

[0006]

The retightening device and the internal pressure inspection device are both a cutting device for cutting out pressure vessels conveyed on a line one by one, and a gripping device for gripping each pressure container at a plurality of inspection positions. The apparatus is provided with a head for performing work at each inspection position. The additional tightening device and the internal pressure inspection device are separate devices because the heads respectively provided are different from those for additional tightening having the additional tightening mechanism and those for internal pressure inspection having the internal pressure inspection mechanism.

In the internal pressure inspection, there is a device in which an internal washing machine is provided with the function. However, since the internal washing is usually performed with the barrel in an inverted position (the valve is on the lower side), the internal pressure sensor is used. There is a situation in which the washing water is spilled to the side, and erroneous detection tends to increase due to this.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and a first object of the present invention is to share a device part with a residual pressure inspection (internal pressure inspection) step and a retightening step.
One of implementing the apparatus is to provide a test 査装 location of the head unit and the pressure vessel of the pressure vessel for inspection can realize a reduction in simplification and device cost of a line.

A second object of the present invention is to securely seal the internal pressure so as not to leak when the head is pressed against the pressure vessel, even if the engaging body is not in a positional relationship capable of engaging with the valve.

[0010] A third object is to rotate the engagement body.
An object of the present invention is to suppress abrasion of a seal member, a packing of a pressure vessel with which a pressing body is in contact, and the like. A fourth object is to re-tighten the valve in a state where the internal pressure of the pressure vessel is always equal to or lower than a specified value, thereby suppressing a variation in the tightening strength of the valve.

[0011]

According to the first aspect of the present invention, there is provided a pressure vessel having a head for pressing a valve side of the pressure vessel, the head being engaged with a valve of the pressure vessel. Rotate this to perform additional tightening,
The head has both a tightening mechanism for detecting an abnormality of the valve based on the above, and an internal pressure inspection mechanism for measuring the internal pressure by taking in the internal pressure of the pressure vessel by pressing a predetermined position of the valve of the pressure vessel. I have.

According to another aspect of the present invention, the second object is achieved.
In the invention described in (1), in the invention described in (1), the internal pressure inspection mechanism leaks in order to transmit an internal pressure released from the pressure vessel to a pressure measuring device when a predetermined portion of the valve is pressed by a pressing body. And a retracting mechanism for retracting an engaging body that engages with the valve of the retightening mechanism in a direction opposite to a pressing direction of the head with respect to the sealing member.

[0013] In order to achieve the third object, a third aspect is provided.
According to the invention described in (1), in the invention described in (1) or (2), the member holding the seal member and the pressing body can rotate relative to the member holding the engagement body via bearing means. It is provided in.

According to the fourth aspect of the invention, the first to third aspects are provided.
In the invention according to any one of the above, the rotating shaft that holds the engagement body so as to be integrally rotatable is a hollow shaft driven by rotation driving means, and the inside of the hollow shaft is an inner periphery of the engagement body. The gist of the present invention is to provide a path for introducing the internal pressure taken in when the pressing body disposed on the side is displaced in the pressing direction into the pressure measuring device.

According to the fifth aspect of the present invention, the first to fourth aspects are provided.
In the invention described in any one of the above, the head is supported in a state where the head is connected to a joint positioned with respect to the eccentricity or the eccentricity of the valve.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the pressing body is held at a distal end of the joint, and a shaft held at a base end of the joint is driven by pressing driving means. The gist is that the pressing body is pushed out in the pressing direction by the shaft by being driven.

In the invention described in claim 7, claims 1 to 6 are provided.
In the invention according to any one of the above, the internal pressure inspection mechanism and the retightening mechanism are provided with control means for controlling the internal pressure inspection mechanism and the retightening mechanism so as to be driven in a temporally overlapping manner.

[0018] In order to achieve the fourth object, an eighth aspect is provided.
The invention according to any one of claims 1 to 6, further comprising exhaust means for exhausting gas to reduce the internal pressure taken in by driving the internal pressure inspection mechanism, wherein the internal pressure is a specified value. If the pressure exceeds the predetermined value, the exhaust means is operated to reduce the internal pressure to a specified value or less, and after confirming that the internal pressure is equal to or less than the specified value, control means for driving the retightening mechanism is provided.

According to the ninth aspect of the present invention, the pressure vessel is inspected.
The 査装 location, relative arranged pressure vessel inspection position,
The head unit is eclipsed set according to any one of claims 1 to 8.

(Operation) According to the first aspect of the present invention,
The head of the head unit presses the pressure vessel from the valve side. In this state, when the internal pressure inspection mechanism is operated and a predetermined portion of the valve of the pressure vessel is pressed, the internal pressure of the pressure vessel is taken out and the internal pressure is measured. Further, in this state, the retightening mechanism is operated, the engaging body engaged with the valve of the pressure vessel rotates, and retightening of the valve is performed. As described above, since the head unit has both the internal pressure inspection mechanism and the additional tightening mechanism in the head, the residual pressure (internal pressure) inspection step and the additional tightening step can be performed by one apparatus, and the parts of the apparatus can be shared. Can be

According to the second aspect of the present invention, when the head is pressed against the pressure vessel from the valve side, if the engaging body is not in a positional relationship to engage with the valve, the engaging body hits the valve and is pressed by the retracting mechanism in the pressing direction. And evacuate in the opposite direction. Therefore, even when the sealing member is not in the positional relationship in which the engaging body is engaged with the valve, the sealing member correctly hits a predetermined portion of the pressure container when the head is pressed against the pressure container, and sealing is reliably performed.

According to the third aspect of the present invention, even if the engaging member rotates while the seal member and the pressing member are in contact with the pressure vessel, the sealing member and the pressing member are interposed through the bearing means. Does not rotate. For example, during idle rotation until the engagement body engages with the valve, the seal member slides with the pressure vessel,
The pressing body does not slide on the packing of the valve. After the engagement body engages with the valve and the valve starts to rotate,
Among the seal member and the pressing body, the one that comes into contact with the valve rotates together with the valve due to the contact friction caused by the pressing. Therefore, even after the valve starts rotating, the seal member and the pressing body do not slide on the pressure vessel. According to the fourth aspect of the present invention, when the rotation shaft is driven by the rotation driving means, the engagement body rotatably held by the rotation shaft rotates. The internal pressure taken in when the pressing body disposed on the inner peripheral side of the engaging body is displaced in the pressing direction is transmitted to the pressure measuring device through the inside of the hollow shaft which is the rotating shaft.

According to the fifth aspect of the invention, since the head is connected to the joint, the head is positioned with respect to the eccentricity or declination of the valve. According to the invention as set forth in claim 6, the pressing body held at the distal end side of the joint changes posture together with the head so as to be able to cope with the eccentricity and declination of the valve. Are indirectly extruded in the pressing direction.

According to the seventh aspect of the present invention, the internal pressure inspection mechanism and the retightening mechanism are driven by the control means so as to be overlapped in time. That is, the residual pressure inspection (internal pressure inspection) and the retightening are performed simultaneously and concurrently for the overlapping time.

According to the eighth aspect of the present invention, when the internal pressure value measured by the pressure measuring device to measure the internal pressure taken by driving the internal pressure inspection mechanism exceeds the specified value, the exhaust means is operated by the control means, and the internal pressure is controlled. Can be reduced below the specified value. After it is confirmed by the control means that the internal pressure is equal to or less than the specified value, the retightening mechanism is driven by the control means.
Therefore, variation in the tightening strength of the valve due to the internal pressure at the time of retightening hardly occurs.

According to the ninth aspect of the present invention, a pressure vessel
In the test 査装 location, the pressure vessel is placed in inspection position. To place pressure vessel inspection position, to press the head from the valve side as the head unit approaches. In this state, the internal pressure inspection mechanism and the additional tightening mechanism are operated, and the residual pressure (internal pressure) inspection step and the additional tightening step are performed using a common head unit. Therefore, since the head unit has two functions, the device having the head unit can be replaced with one device, which is conventionally required for each process.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS.

FIGS. 10 and 11 are a plan sectional view and a side sectional view, respectively, of a residual pressure inspection tightening device having a head unit having both a residual pressure inspection function and a retightening function. The residual pressure inspection retightening device 1 includes a head unit 2, a carry-in conveyor 3, an inspection line 4, a carry-out conveyor 5, and a defective product discharge line 6. Consists of

At the exit of the carry-in conveyor 3, a cutting-out device 7 is provided. The cutting device 7 opens and closes the tips of the two arms 8, cuts out the pressure vessels (in this example, beer barrels) 9 cascading in a line on the carry-in conveyor 2, one by one, and five pieces corresponding to the number of inspections The pressure vessel 9 is carried in at a predetermined interval. Five inspection positions (stations) are set on the conveyor 4a of the inspection line 4 in the longitudinal direction, and five gripping devices 10 for gripping the pressure vessel 9 are arranged at the five inspection positions. I have.
The gripping device 10 includes upper and lower 4 gripping the pressure vessel 9 from both sides.
The arm 11 is provided for each book (eight in total).

As shown in FIG. 11, the arm 8 of the cutting device 7 is connected to each rotating shaft 12 via a link mechanism, and is driven to open and close by driving an air cylinder (neither is shown). In the arm 11 of the gripping device 10, gears 14 attached to the lower ends of four rotating shafts 13 mesh right and left (up and down directions in FIG. 10), and one of the left and right rotating shafts 13 is a link mechanism (see FIG. (Not shown), and the eight arms 11 are opened and closed synchronously by driving the air cylinder 15. FIG.
In FIG. 1, only one of the five air cylinders 15 is shown. In FIG. 10, for convenience of description, a state in which the arm 11 grips the pressure vessel 9 and an open state in which the arm 11 does not grip the pressure vessel 9 are illustrated on one drawing. Actually, the arms 11 of the five gripping devices 10 are driven synchronously.

A support bar 17 is provided on a gate-shaped frame 16 surrounding the inspection line 4 so as to be movable up and down by being guided by two linear guides 18. The support bar 17 includes two screw shafts 20 and 2 screwed to two nut bodies 19.
1 rotates up and down along the linear guide 18 by rotating forward and backward based on the drive of the motor 22. The two screw shafts 20 and 21 are operatively connected by a chain 23, and the rotational force of the screw shaft 20 on the driving side is transmitted to the screw shaft 21 on the driven side via the chain 23.

The support bar 17 is provided with five head units 2 at positions corresponding to positions directly above the inspection positions. The pressure vessel 9 to be inspected has a plurality of sizes according to its capacity, and the height of the five head units 2 is adjusted by raising and lowering the support bar 17 in accordance with the height of the pressure vessel.

As shown in FIG. 10, a defective product discharging conveyor 6 is connected to the entrance of the unloading conveyor 5 so as to be orthogonal. An extruder 24 is provided at a position facing the defective product discharge conveyor 6 with the carry-out conveyor 5 interposed therebetween. The extruding device 24 includes an extruding bar 26 driven forward and backward by an air cylinder 25. The pressure vessel 9 determined to be defective in the inspection line 4 is pushed out by the extruding bar 26 to the defective product discharge conveyor 6 and rejected. The pressure vessel 9 determined to be non-defective in the inspection line 4 flows straight through the unloading conveyor 5 from the inspection line 4 and is sent to the next step.

In this embodiment, the valve 30 of the pressure vessel 9 to be inspected by the residual pressure inspection tightening device 1 is shown in FIG.
Has a substantially triangular cap 31 as shown in FIG. As shown in FIG. 8, the valve 30 is screwed to the opening 32 of the pressure vessel 9 via a packing 33. A packing 35 is interposed in a gap at the upper end between the cap 31 and the valve tube 34 extending in the center of the valve 30 along the axis thereof. The packing 35 is a spring (coil spring) via a plate 36.
When the packing 35 is pushed downward, a gap is formed and the internal pressure (residual pressure) is released as shown by the arrow in FIG.

Next, the structure of the head unit 2 will be described.
FIG. 1 shows a side sectional view of the head unit 2. The head unit 2 includes a support plate 38 extending downward from the support bar 17.
The movable block 40 provided on a side of the linear rail 39 is engaged with the linear rail 39 fixed thereto, so that the linear rail 39 can be moved up and down along the linear rail 39. An air cylinder 41 is provided on the support plate 38 and its rod 4
1a is a supporting portion 4 extending from the movable block 40.
0a.

A hollow shaft 44 as a rotation shaft is rotatably supported inside a cylindrical support member 42 supported by the movable block 40 via a pair of upper and lower bearings 43. A gear 45 is fixed to the hollow shaft 44 in a state of being externally fitted.

As shown in FIG. 2, a drive shaft 46a of a servo motor 46 as a rotary drive means is connected to a speed reducer 47, and a gear 48 fixed to an output shaft 47a of the speed reducer 47 meshes with the gear 45. I have. Therefore, when the servo motor 46 is driven, the speed reducer 47 and the gears 45 and 48 are driven.
The hollow shaft 44 is rotationally driven via the.

As shown in FIGS. 1 and 2, a pipe-shaped stick 49 as a shaft is inserted into the hollow shaft 44. As shown in FIG. 2, an engaging piece 50 is fixed to the upper end of the stick 49, and a gripping piece 53 fixed to a rod of an air cylinder 52 as a pressing drive means disposed on the upper surface of the upper housing 51. The engagement piece 50 is gripped from above and below. Therefore, when the air cylinder 52 is driven, the stick 49 moves up and down inside the hollow shaft 44.

As shown in FIGS. 1, 2 and 3, the hollow shaft 4
The head 54 is fixed to the lower end of the fourth. As shown in FIGS. 1 and 3, the lower end of the hollow shaft 44 is
The outer ring member 58 in which the cylindrical members 5 and 56 and one cylindrical member 57 are integrally fixed is connected via a coupling 59 as a joint. As shown in FIGS. 1, 4 and 5, the coupling 59 is a cruciform joint, and includes three parts, a first connecting piece 60, an intermediate member 61 and a second connecting piece 62.

The first connecting piece 60 has a cylindrical portion 60a and a pair of extending portions 60b extending downward from two opposing positions on the lower end outer peripheral surface. The second connecting piece 62 is connected to the ring portion 6.
2a, and a pair of extending portions 62b extending upward from two opposing positions on the peripheral edge of the upper surface. The intermediate member 61 includes a ring 63 having a cross shape in a plan view and four pins 64 protruding in a cross shape from four ends thereof. The four pins 64 of the intermediate member 61 are extended portions 60 b of the first connecting piece 60.
Hole 60c and the hole 6 of the extension 62b of the second connecting piece 62.
The three components are integrally assembled by being inserted through the respective 2c. Therefore, the first connecting piece 60 and the second connecting piece 62 can be relatively displaced on the XY plane along the pin 64 and can be relatively rotated about the X axis and the Y axis around the pin 64. .

As shown in FIGS. 1 and 3, the lower end of the hollow shaft 44 is fixedly fitted in the cylindrical portion 60a of the first connecting piece 60, and the upper surface of the outer ring member 58 is fixed to the second connecting piece 62. It is fixed to the lower surface.

As shown in FIGS. 3 and 6, six support rods 65 project downward from circumferentially equally spaced positions on the lower surface of the outer ring member 58, and a substantially annular pressing head 66 is provided. It is supported by the support rod 65 so as to be inserted therethrough, and is mounted so as to be vertically displaceable along the support rod 65. As shown in FIG. 6, the pressing head 66 is urged downward by six springs (coil springs) 67 disposed on the lower surface side of the outer ring member 58 at positions between the support rods 65 in the circumferential direction. I have. Support rod 65, pressing head 66 and spring 67
Constitutes an evacuation mechanism. In FIG. 3, the pressing head 66 is shown by a cross section taken along line III-III in FIG.

A pressure vessel 9 is provided above the inside of the pressing head 66.
An engagement claw 68 as an engagement body that engages with the cap 31 of the valve 30 is mounted. The engaging claw 68 has three claws 68a that engage with the three cut surfaces 31a of the substantially triangular cap 31. The lower portion of the pressing head 66 is made of resin, and the inner peripheral surface thereof is formed as a tapered surface 66a that expands downward so as to guide the valve 30. The hollow shaft 44, gear 45, outer ring member 58, coupling 59, support rod 65, pressing head 66, spring 67, and engaging claw 68
A retightening mechanism is constituted by the above.

Inside the outer ring member 58, an inner ring member 69 is disposed via a bearing 70 as bearing means so as to be relatively rotatable. An annular seal member 71 is fixed to the lower surface of the inner ring member 69 so as to be disposed inside the engagement claw 68. The seal member 71 has a size and a diameter that can be brought into contact with the upper surface of the cap 31 and the outer peripheral side of the packing 35. Inner ring 6
9, a substantially bottomed cylindrical pressing body 72 is slidable in the vertical direction with respect to the inner ring member 69 in a state in which a front end (lower end) on the opening side protrudes toward the inner peripheral side of the seal member 71. It is arranged in. An O-ring 73 is attached to the inner ring 69 at a position where the pressing body 72 slides. The pressing body 72 is urged upward by a spring (coil spring) 74 disposed on the outer peripheral surface side thereof, and is regulated at the upper limit position shown in FIG.

The distal end of the pressing body 72 has a size and diameter capable of pushing the packing 35. Stick 49
The pressing body 72 is pushed down by its lower end pressing the upper surface of the pressing body 72.

A pipe 75 passes through the inside of the stick 49, and a tip end (lower end) of the stick 49 is connected to a pressing body 72 via a joint 76 so as to communicate with the inside. The pipe 75 is for taking in the internal pressure (residual pressure) that is released when the pressing body 72 presses the packing 35 of the pressure vessel 9, and the upper end side thereof is a pressure sensor 77 as a pressure measuring device for detecting the internal pressure. (Shown in FIG. 7). The stick 49 and the air cylinder 5
2, an internal pressure inspection mechanism is constituted by the coupling 59, the pressing body 72, the spring 74, the pipe 75, and the like.

FIG. 7 is a block diagram showing an electrical configuration of the head unit 2. As shown in FIG. Controller 7 as control means
8 is an electromagnetic switching valve 7 for driving the air cylinder 52
9 and drive control of the servo motor 46. Pressure sensor 7
A signal indicating that the internal pressure 7 has been transmitted through the pipe 75 is input to the controller 78. When the internal pressure value is smaller than a set value at which the valve 30 may be opened based on the detection value input from the pressure sensor 77, the controller 78 sets the pressure vessel 9 under the residual pressure test as a reject target.

The servo motor 46 is driven at a constant rotation speed, and the drive method is stopped when the rotation torque reaches a specified torque. The servo motor 46
Is driven with a constant rotational torque, and the engagement claws 68 (head 5
The control method of 4) in which the drive is stopped when the rotation speed becomes zero speed may be adopted.

Next, the operation of the residual pressure inspection retightening device 1 will be described. When the five pressure vessels 9 cut out one by one by the cutting-out device 7 are arranged at each inspection position, the conveyor 4a of the inspection line 4 is stopped, and each gripping device 10 is driven to move the pressure vessel 9 to the arm. The gripper 11 is non-rotatably gripped and positioned.

Next, the air cylinder 41 is driven to lower the head unit 2, and the pressing head 66 is pressed against the valve 30 of the pressure vessel 9. As shown in FIG. 8, the seal member 71 is in close contact with the upper surface of the cap 31 outside the packing 35. At this time, the pawl 68a of the engaging pawl 68 does not engage well with the cut surface 31a of the cap 31, and the cap 3
1, the pressing head 66 is relatively displaced upward against the urging force of the spring 67, whereby the sealing member 7 is pressed.
1 reliably contacts the upper surface of the cap 31.

For example, when the pressure vessel 9 is deformed,
The position of 0 may be eccentric or the valve 30 may be deviated and the upper surface may not be horizontal. Valve 30 is tapered surface 66a
When the head 54 presses the upper surface of the valve 30 while guiding, the coupling 59 changes the posture so as to be horizontally displaced or angularly displaced by the coupling 59 in accordance with the eccentricity and declination of the valve 30. As a result, the head 54
Are positioned in accordance with the eccentricity and declination of the valve 30, and the seal member 71 is in close contact with the cap 31.

Next, the controller 78 drives the electromagnetic switching valve 79 and the servomotor 46. As a result, the air cylinder 52 is driven to extend and the stick 49 is pushed down, and the pressing body 72 is indirectly pushed down against the urging force of the spring 74. As shown in FIG. 8, since the tip of the pressing body 72 pushes down the packing 35, the internal pressure of the pressure vessel 9 leaks from the gap of the packing 35 as shown by the arrow in FIG. This internal pressure is transmitted from the inside of the pressing body 72 to the pressure sensor 77 through the pipe 75. A detection signal indicating that the pressure sensor 77 has detected the internal pressure is input to the controller 78, and the controller 78 determines that the pressure vessel 9 whose internal pressure value is lower than the set value is to be rejected based on the input detection value.

At approximately the same time as the extension driving of the air cylinder 52, the servo motor 46 is driven to rotate forward and the speed reducer 47 is driven.
Since the hollow shaft 44 rotates forward through the gears 45 and 48, the head 54 rotates in the tightening direction. Head 54
Starts rotating, the engaging claws 68 that were not engaged with the cap 31 when the head unit 2 was lowered engage with the cap 31 by at least 120 degrees. Then, after the engaging claw 68 is engaged with the cap 31, the valve 3
0 is tightened. When the rotation torque of the servo motor 46 reaches the specified torque, the drive is stopped. At this time, if the servo motor 46 continues to rotate for a predetermined time or more,
Since there is a possibility that the valve 30 is running idle due to an error in the screw of the valve 30, the pressure vessel 9 is also subject to rejection. Thus, the residual pressure inspection and the retightening are performed almost simultaneously.

The inner ring member 69 and the outer ring member 58 form a bearing 70.
Between the engaging claw 68 and the cap 31, the seal member 71 and the pressing body 72 that are in contact with the cap 31 do not rotate, and the engaging claw 68 (pressing). The head 66) idles. After the engagement claws 68 are engaged with the cap 31 and the cap 31 starts to rotate, the seal member 71 and the pressing body 72
It is caused to rotate by contact friction with it. Therefore, it is difficult for the seal member 71 to slide with the cap 31 and the pressing body 72 to slide with the packing 35, and the sliding wear of the seal member 71 and the packing 35 is avoided.

When the residual pressure inspection and retightening by the head unit 2 are completed, the arm 11 of the gripping device 10 is opened, the conveyor 4a of the inspection line 4 is driven, and the five pressure vessels 9 are unloaded from the inspection line 4. You. In this unloading process, the position of each pressure vessel 9 is known to the control device of the residual pressure inspection and tightening device 1, and the pressure container 9 determined to be rejected is driven by the air cylinder 25 of the extrusion device 24. It is extruded by the extrusion bar 26 to the defective product discharge conveyor 6. The pressure vessel 9 determined to be non-defective on the inspection line 4 is taken out of the inspection line 4 by the conveyer 5.
Flows straight through as is and is sent to the next step.

As described above in detail, according to this embodiment, the following effects can be obtained. (1) According to the residual pressure inspection retightening device 1, the head unit 2 has an internal pressure inspection function and a retightening function, and therefore, conventionally two refilling devices and a residual pressure inspection device need to be installed in the filling line. Can be completed by one residual pressure inspection retightening device 1. Also, since the head unit 2 has an internal pressure inspection function and a retightening function,
The cutting device, inspection line, gripping device, etc.
Can be shared in one process. Therefore, simplification by saving space of the filling line and reduction of apparatus cost by sharing apparatus parts can be realized. Further, since the internal pressure inspection and the retightening can be performed only by moving the head unit 2 by one stroke, the operation time of the two steps in the filling line can be reduced, and the processing capacity can be improved.

(2) Since the internal pressure inspection and retightening are performed almost simultaneously in parallel by the head unit 2, the work time can be further reduced, and the processing capacity can be further improved. (3) Since the pressing head 66 is urged downward by the spring 67 so as to be retractable upward with respect to the seal member 71, the engaging claw 68 is fitted into the cap 31 when the head unit 2 is lowered. Even if it is not, the sealing member 71 can be reliably applied to the upper surface of the cap 31 by retreating the engaging claw 68 upward. Therefore, the upper surface of the cap 31 can be reliably sealed whenever the head unit 2 is lowered. Therefore, an accurate residual pressure test (internal pressure test) can be performed.

(4) Since the head 54 adopts a floating structure which can be freely displaced horizontally and angularly by using the coupling 59, the head 54 can cope with the eccentricity and the declination of the valve 30 due to the deformation of the pressure vessel 9. 54 can be positioned.

(5) When the stick 49 is pressed down, the pressing body 72 is indirectly pressed at the tip (lower end) of the stick 49.
Because of the step structure, the pressing body 72 can also cope with the eccentricity and the eccentricity of the valve 30 firmly.

(6) The hollow shaft 44 is used as a rotating shaft for rotating the head 54, and a stick 49 for pushing the pressing body 72 is provided.
And a pipe 75 for transmitting the internal pressure to the pressure sensor 77.
Is passed through the inside of the stick 49, so that the routing structure of the pipe 75 can be simplified. For example, the pipe 75 is connected to the hollow shaft 44.
When the structure is taken out to the outside, there is a rotating structure on the outside, which complicates the piping arrangement structure. On the other hand, since the pipe 75 is passed through the inside of the hollow shaft 44, particularly the inside of the stick 49, the pipe structure can be simplified.

(7) The inner ring member 69 and the outer ring member 58 are connected via the bearing 70.
Even if the head 54 rotates while the gasket 2 presses the packing 35, abrasion of the packing 35 can be avoided.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the structure of the valve of the pressure vessel 9 to be inspected is different from that of the first embodiment. Therefore, the structure of the head portion of the head unit 2 is different from that of the first embodiment. Note that the entire structure of the residual pressure test tightening device 1 and the structure of parts other than the head of the head unit 2 are the same as those in the first embodiment, and the same reference numerals are used for the same parts. The description will be omitted, and only a different head structure will be described.

FIGS. 13 and 14 show the valve structure of the pressure vessel 9.
Shown in The valve 82 is screwed to the opening 81 of the pressure vessel (in this example, a beer barrel) 9 such that the upper surface thereof is substantially flush with the upper surface of the opening 81. The valve 82 has a recess in the center, and two claw portions 83 are formed at 180 ° on the inner peripheral surface side of the upper end. When the annular projection 84 at the center of the bottom of the recess is pressed from above, the internal pressure of the pressure vessel 9 is released. In order to seal without leaking internal pressure,
The seal member 85 needs to be brought into contact with the upper surface of the mouth portion 81. That is, the point that the seal member 85 needs to be arranged on the outer peripheral side of the engagement cylinder 86 as the engagement body that engages with the claw portion 83 is different from the first embodiment. It has a head structure that can respond to

As shown in FIG. 12, an inner ring member 92 composed of a ring 90 and a substantially cylindrical body 91 is fixed to the lower surface of the second connecting piece 62 of the coupling (cross joint) 59. An outer ring member 94 is connected to a lower outer peripheral surface side of the inner ring member 92 via a bearing 93 so as to be relatively rotatable. The outer ring member 94 includes a substantially cylindrical tubular body 95 having an extending portion extending toward the inner peripheral surface, and a ring 96. A ring-shaped seal member 85 is fixed to the lower surface of the extending portion extending from the inner peripheral surface side of the cylindrical body 95. In the present embodiment, the pressing head 97
Are constituted by the outer ring member 94 and the seal member 85. The seal member 85 has a size and a diameter capable of contacting the upper surface of the opening 81 of the pressure vessel 9. The ring 96 is made of resin, and the inner peripheral surface is formed as a tapered surface 97a that can guide the valve 82.

The substantially cylindrical engagement cylinder 86 has four support rods 98 projecting downward from the lower surface of the inner ring member at positions 90 ° in the circumferential direction thereof (however, only one support rod 98 is shown in the drawing). Is supported so as to be vertically displaceable along each support rod 98 while being inserted through the support rod 98, and is urged downward by four springs (coil springs) 99 disposed between the support rods 98. The engagement cylinder 86 urged downward by the spring 99 is located on the inner upper surface of the pressing head 97 (the upper surface of the extending portion that extends toward the inner peripheral surface of the cylindrical body 95 and has the sealing member 85 fixed to the lower surface). In contact. At the tip (lower end) of the engagement cylinder 86, concave portions 86a engageable with the claw portions 83 of the valve 82 are provided at four positions at 90 degrees in the circumferential direction. The retracting mechanism is constituted by the support rod 98, the engagement cylinder 86 and the spring 99. Also, the hollow shaft 44, the gear 4
5, the coupling 59, the engagement cylinder 86, the inner ring member 92, the support rod 98, the spring 99 and the like constitute a retightening mechanism.

Therefore, the engagement cylinder 86 is
The rotation of the hollow shaft 44 through the gears 45 and 48 based on the driving of the inner ring 9 through the coupling 59
2 and is integrally driven to rotate, and retreats upward with respect to the outer seal member 85 (outer ring member 94) with respect to a pressing force received from below.

The substantially cylindrical pressing body 100 is
9 and the bearing metal 1 with respect to the inner ring member 92.
01 and supported by a spring (coil spring) 102 interposed between a flange portion 100a at an upper end thereof and an upper surface of an inner peripheral step portion of the inner ring member 92. . The position of the pressing body 100 is restricted with respect to the upward bias by the large diameter portion of the portion corresponding to the lower end of the bearing metal 101 abutting on the inner ring member 92. In addition,
A bearing means is constituted by the bearing 93 and the bearing metal 101. Also, the stick 49 and the air cylinder 5
2, an internal pressure inspection mechanism is constituted by the coupling 59, the pipe 75, the pressing body 100, the spring 102, and the like.

The pressing body 100 has a diameter substantially equal to the outer diameter of the projection 84 of the valve 82. The upper end of the passage 100b passing through the axis and passing through the upper and lower end surfaces is connected to a pipe 75 via a joint 76. I have. When the pressing body 100 presses the projection 84 of the valve 82, the internal pressure released from the pressing body 100 is reliably sent to the passage 100 b without leaking, so that the sliding portion between the pressing body 100 and the bearing metal 101, the inner ring member 92 and the outer ring member 9
The two O-rings 103 and 104
Are provided respectively.

Therefore, when the head unit 2 is lowered, the seal member 85 contacts the upper surface of the opening 81 of the valve 82. In this state, the air cylinder 52 is extended and driven, and the stick 49 pushes the pressing body 100, and the pressing body 100 pushes the projection 84 of the valve 82. The internal pressure released at this time is transmitted to the pressure sensor 77 through the passage 100b of the pressing body 100 and the pipe 75.

Further, the concave portion 86 a of the engagement cylinder 86 is
Even if it does not fit into the engaging cylinder 8 against the urging force of the spring 99.
When the 6 is retracted upward, the seal member 85 comes into contact with the upper surface of the mouth portion 81. Also, even if the pressure vessel 9 is deformed or the like, the valve 82 is eccentric or deviated due to deformation, etc., and the head 54 changes its posture via the coupling 59, so that the head 54 responds to the eccentricity or declination of the valve 82 Positioned.

When the servomotor 46 is driven, the inner ring member 92 and the engagement cylinder 86 rotate integrally with the hollow shaft 44 via the coupling 59. At this time, the outer ring member 94
Is supported rotatably with respect to the inner ring member 92 via the bearing 93, the seal member 85 fixed to the outer ring member 94 does not rotate while being in contact with the opening 85. Therefore, the sealing performance of the sealing member 85 is ensured. Further, wear of the seal member 85 is avoided.

After the engagement cylinder 86 starts to rotate and the concave portion 86a engages with the claw portion 83, the valve 82 starts to rotate, and the pressing body 100 presses the projection 84 with the rotation of the valve 82.
Rotates together with the valve 82. Therefore, the protrusion 84
The sliding wear between the pressing member 100 and the pressing member 100 hardly occurs.

As described in detail above, according to the present embodiment,
Even if the pressure vessel 9 that needs to be sealed by applying a seal member 85 to the mouth 81 of the pressure vessel 9 and engage the engagement tube 86 with the claw 83 of the valve 82, the first The effects (1) to (6) in the embodiment can be similarly obtained.

(Third Embodiment) Next, a third embodiment will be described with reference to FIG. This embodiment is different from the first and second embodiments in the control method. The structure of the head unit 2 is substantially the same as that of the first and second embodiments, except that the pressure sensor 77 is provided with a valve for exhausting the internal pressure (gas) introduced through the pipe 75. For this reason, the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be described.

As shown in FIG. 15, the upper housing 51
Inside, an exhaust pipe 75a for exhausting the internal pressure (gas) introduced into the pressure sensor branches off from the pipe 75, and an electromagnetic on-off valve 110 is provided on the pipe 75a. The solenoid on-off valve 110 is controlled to open and close by its solenoid 101 being excited and demagnetized by a controller 78 as control means. The exhaust means is constituted by the pipe 75a and the electromagnetic switching valve 110.

The controller 78 is programmed so that retightening is performed when the internal pressure of the pressure vessel 9 is equal to or less than a specified value. When the internal pressure value detected by the pressure sensor 77 exceeds the specified value, the electromagnetic switching valve 110 is activated. The valve is opened until the internal pressure value detected by the pressure sensor 77 reaches the specified value, and gas is exhausted from the exhaust pipe 75a. Then, after it is confirmed based on the result of the internal pressure inspection that the internal pressure is equal to or less than the specified value, the driving of the servomotor 46 is started, and the retightening is performed.

As described in detail above, according to this embodiment, the following effects can be obtained. (8) First, the internal pressure test of the pressure vessel 9 is performed, and the gas is exhausted as necessary, so that the valve 30 (82) is retightened while the internal pressure of the pressure vessel 9 is always equal to or lower than the specified value. Valve 30 (8
2) Variation in tightening strength can be reduced. In other words, even if the rotational torque of the servomotor 46 is constant, the tightening strength of the valve 30 (82) varies depending on the residual pressure (internal pressure) of the pressure vessel 9 when retightening. In this example, since retightening is always performed at an internal pressure equal to or less than the specified value, variation in the tightening strength of the valve 30 (82) can be reduced.

The embodiment is not limited to the above, but may be carried out as follows. The residual pressure inspection tightening device 1 including the plurality of head units 2 is not limited to the serial batch method in which the pressure vessels 9 are replaced and inspected in plurals as in the structures of the first and second embodiments. For example, a parallel batch system in which the pressure vessels 9 are sorted in multiple rows on the carry-in conveyor 3 and a large number of cutting devices 7, gripping devices 10, head units 2, and inspection lines 4 are arranged in parallel may be employed. In addition, as shown in FIG. 16, a rotary residual pressure inspection tightening device 120 that can continuously inspect the pressure vessel 9 may be used. That is, the wheel 122 for sending the pressure container (beer barrel) cut out by the arm 8 of the cut-out device 7 of the carry-in conveyor 3 to the rotary table 121 for inspection, and the pressure container 9 rotated about one turn by the rotary table 121 are used. And a wheel 123 for sending to the unloading conveyor 5. The head unit 2 described in the first and second embodiments is provided at a plurality of inspection positions on the turntable 121 so as to be able to move up and down. The pressure vessel 9 continuously sent to the rotary table 121 by the wheel 122 is subjected to residual pressure inspection and retightening by the head unit 2 of the inspection position while rotating about one turn, and continuously to the unloading conveyor 5 side by the wheel 123. Is carried out.

According to this configuration, the pressure vessel 9 can be continuously fed to perform the residual pressure inspection and retightening.
Compared with the batch method as in each of the above embodiments, the processing capacity can be increased in proportion to the number of head units 2 because there is no loss in the time for replacing the pressure vessels. That is, in order to increase the processing capacity of the apparatus, it is necessary to increase the number of head units 2 in the batch system, but in the rotary system, although a rotary mechanism is required, the number of head units 2 is relatively small. In order to increase the processing capacity, the rotary method is more cost-effective.

In the second embodiment, instead of exhausting the gas in the pressure vessel 9, the servo motor 46 is drive-controlled so as to change the rotational torque at the time of retightening according to the internal pressure detected by the pressure sensor 77 ( Current value control)
The fastening strength of the valve 30 (82) may be uniform. According to this configuration, the same effects as in the second embodiment can be obtained without providing an exhaust unit such as the electromagnetic on-off valve 110.

The structure of the head unit 2 is not limited to the first and second embodiments. A structure corresponding to the valve structure of the pressure vessel can be adopted. For example, an engaging body for retightening,
What is necessary is just to provide the pressing body for the residual pressure inspection so as to be coaxial with the axis of the head. Further, the mechanism for retracting the engagement body upward with respect to the seal member for sealing the internal pressure released when the pressing body is pressed down can be appropriately changed. Further, as a mechanism capable of coping with the eccentricity and declination of the valve, a cross joint is employed in the above embodiments, but other joint structures such as Oldham coupling may be employed. Further, instead of changing the attitude of the head or the like according to the eccentricity or the angle of deviation of the valve, for example, a mechanism for adjusting the attitude of the pressure vessel so that the valve is arranged at a proper position may be adopted. In this case, a posture adjusting mechanism such as the coupling 59 is not necessarily required for the head unit.

It is not always necessary to provide the engaging member and the pressing member so as to be relatively rotatable. For example, in the second embodiment, a structure in which the pressing body and the valve slide at the time of retightening may be used as long as it is not necessary to worry about abrasion due to sliding between metals.

A test for rotating the re-tightening engagement body in the loosening direction opposite to the re-tightening direction can be added. First, a loosening test is performed with a small rotating torque, and then retightening is performed with a tightening torque. For example, if a loosening test reveals that the valve has become loose, the valve is rejected as possibly open in the market.

The pressure vessel is not limited to a beer barrel.
For example, it may be a pressure vessel for containing juice or other liquid. What is filled in the pressure vessel is not limited to a liquid, but may be a gas, for example. Also, the pressure vessel need not be barrel-shaped.

Instead of lowering the head unit, a configuration may be adopted in which the residual pressure is inspected and retightened by raising the pressure vessel and pressing the valve against the head unit.

The gap between the hollow shaft and the stick may be used as a path for transmitting the internal pressure to the pressure sensor. Instead of passing a pipe through the inside of the stick, the inside of the stick may be configured as a passage for transmitting internal pressure. In this case, the upper and lower ends of the stick are closed. Even with these configurations, even if the outer peripheral side of the pressing body rotates relative to the pressing body, the internal pressure can be transmitted to the pressure measuring device (pressure sensor) without crossing the member on the outer peripheral side that rotates relatively.

The pipe 75 may be routed so as not to pass through the inside of the hollow shaft 44 but to extend outside to cross the rotary structure. In this case, the stick does not need to be hollow.

The technical ideas other than the claimed invention grasped from the above embodiments are described below together with their effects. (1) In claim 1, the retightening mechanism and the internal pressure inspection mechanism are provided on the same axis of the head.
According to this configuration, when the head unit is pressed toward the valve side of the pressure vessel, for example, the pressing body of the internal pressure inspection mechanism is located at a predetermined position where the head is pressed in order to release the internal pressure of the valve, and the valve is used to retighten the valve. For example, an engaging body of the retightening mechanism to be engaged is located so as to be able to engage with the valve. Therefore, the residual pressure test and the retightening can be performed while the head unit is once pressed against the pressure vessel.

(2) In claim 1 or 2, the member holding the seal member and the member holding the engagement body are provided so as to be relatively rotatable via bearing means. According to this configuration, when the engagement body rotates, the sealing member rotates together with the portion (cap or mouth) on the pressure vessel side that comes into contact with the sealing member through the bearing means,
Since it does not rotate, the effect of securing the sealability by the seal member and suppressing the wear of the seal member can be obtained.

(3) In claim 1 or 2, the internal pressure inspection mechanism has a pressing member for pressing a predetermined portion of the valve, and the pressing member is pressed against a member holding the seal member in a pressing direction thereof. They are connected so as to be relatively displaceable and integrally rotatable. According to this configuration, together with the seal member, the pressing body rotates together with the predetermined portion or does not rotate while pressing the predetermined portion on the valve side of the pressure vessel regardless of the rotation of the engagement body. Therefore, for example, when the predetermined portion of the valve is packing, wear of the packing can be suppressed. Further, even when the predetermined portion is made of metal, sliding wear with the pressing body can be suppressed.

(4) In claim 6, the pressing body is held at the distal end side of the joint, and the shaft held at the base end side of the joint is driven by pressing driving means, whereby the pressing body is pressed by the shaft. The body is extruded in the pressing direction, and the shaft for extruding the pressing body in the pressing direction is a second hollow shaft inserted inside the hollow shaft, for transmitting the internal pressure to the pressure measuring device. A path passes through the interior of the second hollow shaft. According to this configuration, the shaft is
Hollow shaft of which the inside is a path for transmitting the internal pressure to the pressure measuring device, so that the routing structure such as a pipe for transmitting the internal pressure to the pressure measuring device can be simplified. .

(5) A retightening device for residual pressure inspection, comprising the head unit according to any one of claims 1 to 8.
According to this configuration, the same effect as the invention according to any one of claims 1 to 8 can be obtained by the residual pressure inspection retightening device.

(6) In claim 9 or (5),
9. A rotary table, and the head is slid so as to approach the pressure vessel disposed at an inspection position on the rotary table from the valve side so as to be able to be pressed.
The head unit according to any one of the above, is provided so as to rotate synchronously with the turntable in a state where the head unit is arranged at the inspection position. According to this configuration, the pressure vessel is continuously fed, the residual pressure inspection and the retightening can be performed, and the processing capacity can be increased for the number of head units.

[0094]

As described in detail above, according to the first and ninth aspects of the present invention, the head of the head unit is
Since both the internal pressure inspection mechanism and the additional tightening mechanism are provided, the residual pressure (internal pressure) inspection step and the additional tightening step can be performed by one apparatus, thereby simplifying the line and reducing the apparatus cost.

According to the second and ninth aspects of the present invention, since the engaging member is retracted by the retracting mechanism, the sealing member can be moved to the predetermined position of the pressure vessel even if the engaging member is not in the positional relationship of engaging with the valve. The seal can be securely sealed so as not to leak the internal pressure taken out by properly applying to the site.

According to the third and ninth aspects of the present invention, since the seal member and the pressing member are provided with the bearing means so as to rotate relative to the engagement member, the seal member slides on the pressure vessel. In addition, wear of elastic parts such as rubber due to sliding of the pressing body against the packing of the valve or the like can be avoided.

According to the fourth and ninth aspects of the present invention, the rotating body for holding the engaging body so as to be integrally rotatable is a hollow shaft, and the internal pressure taken in when the pressing body is displaced in the pressing direction is reduced by the pressure. Since the path for transmitting the internal pressure to the pressure measuring instrument does not need to cross the rotating part, since the path for transmitting the pressure to the measuring instrument is set inside the hollow shaft.

According to the fifth and ninth aspects of the present invention, since the head is connected to the joint,
The head can be positioned with respect to the valve eccentricity or declination. According to the invention described in claim 6 and claim 9, since the pressing body is indirectly pushed out in the pressing direction by the shaft that is slid by the pressing drive means, the pressing body together with the head is adjusted to the eccentricity and the declination of the valve. The posture can be changed so as to respond.

According to the seventh and ninth aspects of the present invention, the internal pressure inspection mechanism and the retightening mechanism are driven so as to overlap in time, so that the residual pressure inspection (internal pressure inspection) is performed for the overlapped time. And retightening can be performed simultaneously in parallel, and the work time can be reduced.

According to the eighth and ninth aspects of the present invention, when the internal pressure value measured by the pressure measuring device exceeds the specified value, the gas in the pressure vessel is exhausted to reduce the internal pressure to the specified value or less. Since the valve is tightened again, the variation in the tightening strength of the valve can be reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a head unit according to a first embodiment.

FIG. 2 is a partially cutaway front view of the head unit.

FIG. 3 is a side sectional view of a head portion.

FIG. 4 is a side view of the coupling.

FIG. 5 is a sectional view taken along line II-II of FIG. 4;

FIG. 6 is a bottom view of the pressing head.

FIG. 7 is a block diagram showing an electrical configuration of the head unit.

FIG. 8 is a side sectional view showing a valve structure of the pressure vessel.

FIG. 9 is a schematic plan view of a valve.

FIG. 10 is a schematic plan sectional view of a residual pressure inspection tightening device.

FIG. 11 is a schematic side sectional view of a residual pressure inspection tightening device.

FIG. 12 is a partial side sectional view of a head unit according to a second embodiment.

FIG. 13 is a side sectional view showing a valve structure of the pressure vessel.

FIG. 14 is a schematic plan view around the valve of the pressure vessel.

FIG. 15 is a block diagram illustrating an electrical configuration of a head unit according to a third embodiment.

FIG. 16 is a schematic plan view of another example of a residual pressure inspection tightening device.

[Explanation of symbols]

1,120: residual pressure inspection retightening device, 2: head unit, 7, cutting device, 9, pressure vessel, 30, 82, valve, 31: cap, 35: packing, 44: restructuring mechanism and Hollow shaft as rotating shaft, 45 ...
Gears constituting the retightening mechanism, 46 servo motors as rotary driving means, 49 sticks as an internal pressure inspection mechanism and as a shaft, 52 air cylinders as pressing driving means, 54 heads, 58 retightening An outer ring member as a member for holding the engaging body, which constitutes a mechanism, 59... A coupling as a re-tightening mechanism and a coupling as a joint, 60... A first connecting piece constituting a joint, 61. Lumber, 62 ...
Second connecting pieces constituting a joint, 65, 98 ... support rods constituting a tightening mechanism and a retreating mechanism, 66, 97
... Pressing heads constituting a tightening mechanism and a retracting mechanism, 6
7,99 ... spring constituting a tightening mechanism and a retreating mechanism,
Reference numeral 68 denotes an engaging claw as an engaging body, which constitutes a retightening mechanism; 69, an inner ring member as a member for holding a seal member; 70, 93, a bearing that constitutes bearing means;
1, 85: seal member, 75: pipe forming an internal pressure inspection mechanism, 75a: pipe forming exhaust means, 72, 100
.., A pressing member constituting an internal pressure inspection mechanism, 74, a spring constituting an internal pressure inspection mechanism, 77, a pressure sensor as a pressure measuring device, 78, a controller as a control means, 84
··· Projection, 86 ··········································· As as a member as as a member that forms a tightening mechanism and holds the engaging body, Outer ring member 101, bearing metal constituting bearing means 110, solenoid on-off valve constituting exhaust means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65B 57/00-57/08 B67B 1/00-5/06 B67C 3/00 B67C 3/30-3 / 34 G01L 11/00 G01M 3/00-3/04 G01M 3/16

Claims (9)

(57) [Claims] [Claim 1 further comprising a head which presses the valve side of the pressure vessel, engages the valve of the pressure vessel by rotating it
While performing retightening, based on the retightening, the valve
The head has both a retightening mechanism for detecting an abnormality of the pressure vessel and an internal pressure inspection mechanism for measuring the internal pressure by taking in the internal pressure of the pressure vessel by pressing a predetermined portion of a valve of the pressure vessel. Head unit for pressure vessel inspection. The internal pressure inspection mechanism includes a seal member that seals so as not to leak in order to transmit an internal pressure that escapes from the pressure vessel to a pressure measuring device when a predetermined portion of the valve is pressed by a pressing body, 2. The pressure vessel inspection according to claim 1 , further comprising a retracting mechanism that retracts an engagement body of the retightening mechanism that engages with the valve in a direction opposite to a pressing direction of the head with respect to the seal member. 3. Head unit. 3. A member holding the seal member and the pressing body are provided so as to be rotatable relative to a member holding the engagement body via bearing means. A head unit for pressure vessel inspection according to claim 1 or 2. 4. A rotating shaft for holding the engaging body so as to be integrally rotatable is a hollow shaft driven by a rotating drive means,
The inside of the hollow shaft is a path for introducing the internal pressure taken in when the pressing body disposed on the inner peripheral side of the engaging body is displaced in the pressing direction to the pressure measuring device. The head unit for pressure vessel inspection according to any one of claims 1 to 3. 5. The head according to claim 1, wherein the head is supported by being connected to a joint positioned with respect to the eccentricity or the eccentricity of the valve. Head unit for pressure vessel inspection. 6. The pressing body is held at the distal end side of the joint, and the shaft held at the base end side of the joint is driven by pressing driving means, whereby the pressing body is pushed out in the pressing direction by the shaft. The head unit for pressure vessel inspection according to claim 5, wherein the head unit is used. 7. The control device according to claim 1, further comprising control means for controlling the internal pressure inspection mechanism and the retightening mechanism to be driven so as to be overlapped in time. The head unit for pressure vessel inspection according to 1. 8. An exhaust means for exhausting gas to reduce the internal pressure taken by driving the internal pressure inspection mechanism,
When the internal pressure exceeds a prescribed value, the exhaust means is operated to reduce the internal pressure to a prescribed value or less, and after confirming that the internal pressure is at or below a prescribed value, a control means for driving the retightening mechanism is provided. The head unit for pressure vessel inspection according to any one of claims 1 to 6. Against 9. disposed inspection position the pressure vessel, the head unit of the pressure vessel, characterized in that it kicked set according to any one of claims 1 to 8 <br/> test 査装 location.