JPH083840Y2 - Valve attachment / detachment device for high-pressure vessels - Google Patents

Description

TECHNICAL FIELD The present invention relates to a valve attaching / detaching device which is attached to the top opening of a high-pressure container (cylinder) filled with oxygen, acetylene gas, LP gas, and other high-pressure gas.

2. Description of the Related Art Conventionally, as a valve attaching / detaching device of this type, a clamp device for a high-pressure container to be mounted on the base is provided at the lower part of a column standing on a base, while a valve attaching / detaching wrench is provided on the upper part of the column. A movable table having a rotary drive unit attached thereto is movably arranged vertically along the support post via a balancer, and the valve is mounted on a lower end of a rotary spindle driven by the rotary drive unit via a universal joint. Those in which a detachable spanner is connected are already known (see, for example, Japanese Utility Model Laid-Open No. 52-14515).

The valve attaching / detaching device described above has an advantage that the spanner can be easily engaged and disengaged with the valve of the high-pressure container by smoothly moving the spanner up and down together with the rotary drive device and the moving base via the balancer. .

However, since the rotary driving device that moves up and down together with the spanner has a total weight of about 70 kg including the movable table and is quite heavy, it is moved up and down with a light force through the balancer. Even if it can be done, since the inertial force is large, it is not easy to finely adjust the vertical position of the spanner.

On the other hand, even if the high-pressure vessel mounted on the base has the same height and the same capacity, the valve mounting position has a slight variation, so that the spanner engaged with the valve changes its position. It has to be finely adjusted up and down. In such a case, in the above-mentioned conventional valve attaching / detaching device, there is a problem that fine adjustment of the wrench requires labor and poor workability.

The present invention has been made in view of these problems,
It is an object of the present invention to provide a valve fitting device for a high pressure container, which enables easy fine adjustment of the vertical position of the spanner and has excellent workability.

Means for Solving the Problems The technical means of the present invention taken to achieve the above-mentioned object is that the rotary main shaft penetrates through the rotary drive device and is arranged in parallel with the column, and is vertically movable. And the upper end thereof is supported by the movable table via a balancer.

Action With the above configuration, first, the rotary drive device and the movable base are moved up and down according to the height of the high-pressure container placed on the base to set the operating position of the valve attaching / detaching spanner. After that, the rotary main shaft is moved up and down to finely adjust the vertical position of the spanner, and the spanner is engaged with the valve of the container to perform the attaching / detaching operation.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 is a base, 2 is a roller conveyor arranged on the base 1,
The high-pressure container B is used for carrying in or out of a valve attachment / detachment work position on the base 1.

Numeral 3 is a pillar standing upright in one lateral center of the base 1, 4 is a supporting leg standing upright on the base 1 facing the pillar 3, which is lower than the pillar 3 and is about a height above the floor surface. 50-60 cm is preferable. The column 3 and the support leg 4 are arranged so as to sandwich the roller conveyor 2 in a direction substantially perpendicular to the conveying direction. The pillar 3 is formed in a hollow body, and a balance weight 6 housed in the hollow portion 5 is suspended by a chain 8 via a sprocket 7 provided at the upper end of the pillar 3 so as to be vertically movable. Also,
A guide rail 9 extending in the vertical direction is provided on the front surface of the upper portion of the column 3.

Reference numeral 10 denotes a moving base of a rotary driving device 13 which will be described later, which is attached to the guide rail 9 via a linear bearing 11 so as to be vertically movable, and the ends of the chain 8 are connected to each other. The total weight including the working spanner 12 and other accessories is balanced with the balance weight 6. In addition to the balance weight 6, it is also possible to use an air cylinder and a spring balancer.

12 is a spanner for attaching / detaching a valve, 13 is a rotary drive device for the spanner 12, which is composed of an electric motor 14 and a speed reducer 15. A hollow main shaft 18 of the speed reducer 15 has a rotary main shaft 18 sliding vertically through a key 17. It is freely pierced through, the universal joint 19 and the connecting shaft 20 are connected to the lower end of the rotating main shaft 18, and the spanner 12 is connected to the lower end of the connecting shaft 20.
Are attached via pivot pins 21.

As shown in FIG. 2, the rotary drive device 13 has a speed reducer.
Support pin in which 15 casings are arranged in parallel with the rotating main shaft 18.
By connecting and supporting the movable base 10 via 25, the movable base
A load cell 26 for detecting the tightening torque of the spanner 12 is provided between the speed reducer 15 and the movable table 10 while being attached to the vehicle 10. The load cell 26 is a spanner formed by the rotary spindle 18.
When tightening 12, the reaction force is reduced with the support pin 25 as the fulcrum.
By utilizing the action on the casing of 15, the tightening torque applied to the spanner 12 is detected, and the electric motor 14 is stopped by a signal from an indicator not shown. Since the wrench 12 is stopped at a fixed position with its opening directed in a certain direction, a dog 28 in which a limit switch 27 mounted on the upper surface of the speed reducer 15 is slidably fitted in the rotary spindle 18 only in the axial direction. Limit switch 27
And electric signal with the signal from load cell 26 and electric circuit
It is supposed to stop 14.

On the other hand, the upper end of the rotary main shaft 18 is connected to and supported by the wire rope 30 of the spring balancer 29 in a suspended state via a rotatable connecting fitting 31, and the rotary main shaft 18 and the universal joint 19 connected to the lower end thereof, the connecting shaft 20, Balanced with total weight including spanner 12 and other accessories. Spring balancer 29
Is attached to a support arm 32 which is erected on the movable table 10. In addition, instead of the spring balancer 29, a balancer weight,
The rotating main shaft 18 may be balanced by an air cylinder.

33 is a lever for temporarily holding the spanner 12, which is a universal joint
A mounting bracket 34 fixed to 19 is rotatably mounted only in the direction of the arrow through a pin 35, and a magnet 36 mounted on the tip of the mounting shaft 34 attracts and supports the connecting shaft 20 to form a phantom line in FIG. With the connecting shaft 20 supported in an inclined position, the wrench 12 is temporarily separated from the attachment / detachment work position.
The spanner 12 does not interfere with the loading and unloading of B ₁ and B ₂ .

Next, a means for clamping the high-pressure container at the valve attachment / detachment work position on the base 1 will be described.

The clamp device is a receiving pad 40 provided on the upper end of the support leg 4.
And a pressing pad 41 attached to the column 3 so as to face the receiving pad 40.

The receiving pad 40 consists of three rubber pads, a large diameter container pad 40a, a medium diameter container pad 40b and a small diameter container pad 40c, and each pad 40a-40c has a flat contact surface,
It is attached to the outer surface of a rectangular parallelepiped mounting base 43 that is rotatably fitted to the vertical axis 42 protruding from the upper end of the support leg 4, and the mounting base 43 is moved around the vertical axis 42 by 90 degrees. Therefore, any one of the three pads 40a to 40c can be positioned to face the pressing pad 41.

The pressing pad 41 includes two pads 55, 55 forming a V-shaped contact surface and two pads 56, 56 forming a flat contact surface.
These pads 55, 56 are fixed to the front surface of the holding plate 57. As shown in FIG. 3, the holding plate 57 has two guide rods 58, 58 projecting from its back, and these guide rods 58, 58 slide on bearings 59, 59 fixed to both sides of the support column 3. The support plate 57 is movably supported, and is attached to the support column 3 so as to be capable of reciprocating in the horizontal direction, and the piston rod 61 of the air cylinder 60 attached to the support column 3 is connected to the back portion of the support plate 57. The holding plate 57 is configured to be horizontally reciprocally moved by 60.

A movable table 65 is used when handling a small-diameter container B ₃ or a horizontal container B ₄ , and its supporting arm 66 is a pivot pin.
It is attached to the lower part of the column 3 via 67, and can be turned about 90 degrees in the arrow direction from the use position shown by the solid line with the pivot pin 67 as a fulcrum.

Next, an example of use of the valve attachment / detachment device having the above-described configuration will be described first for the large diameter container B ₁ .

The container B ₁ is carried in and placed on the roller conveyor 2 of the base 1 from the direction shown by the arrow A in FIG. At this time, the pad 40a of the receiving pad 40 is previously positioned so as to face the pressing pad 41. Further, the operator moves the moving table 10 balanced with the balance weight 6 up and down so that the position of the spanner 12 is changed to the container.
Approximately match the height of B ₁ . And pad container B ₁
The wrench 12 balanced with the spring balancer 29 is moved up and down while being in contact with the spring 40a to be finely adjusted, and is engaged with the valve 71 screwed into the top opening 70 of the container B ₁ . Then, to advance the pressure pad 41 operates the air cylinder 60, the container B ₁ is pressed by pads 55 and 55 to form a V-shaped contact surface, the container B ₁ between the two pads 55 and 55 and receiving pad 40a Hold it in place.
In this state, the rotation driving device 13 operates to rotate the spanner 12 by the rotation driving force of the rotation main shaft 18 to mount the valve 71 in the top opening 70. When this valve is attached, the reaction force of the tightening torque acts on the reducer 15 with the support pin 25 as the fulcrum, which acts as a load cell.
26, so that the preset tightening torque is
Is applied to the load cell 26, the output voltage of the load cell 26 increases, and a signal is output from an indicator (not shown) connected to the load cell 26 to stop the electric motor 14. Next, the spanner 12 is separated from the valve 71, the pressing pad 41 is retracted to release the fixed holding,
The connecting shaft 20 is attracted and supported by the magnet 36 in an inclined posture as shown by the phantom line in FIG. ₁ to separate the spanner 12 away from the container B _1, and then the container B ₁ is indicated by an arrow B in FIG. Carry out in the direction. At this time, since the support leg 4 of the receiving pad 40 is low, the receiving pad 40 is configured compactly, and the front side of the spanner 12 is completely open, the operator's spanner 12
And the container B ₁ can be easily loaded and unloaded.

It should be noted that the same operation is performed when the valve 71 is pulled out from the container B _1, and the rotation direction of the rotary spindle 18 is simply reversed.

Next, in the case of the medium diameter container B ₂ , the mounting base 43 of the receiving pad 40
180 degrees around the vertical axis 42 and press the pad 40b
The other operation is the same as above with the position facing 41.

On the other hand, in the case of the small diameter container B ₃ , the movable table 65 is used, and the container B ₃ placed on the movable table 65 is used as a receiving pad.
The valve 71 is attached / detached while being fixedly held by 40c and the V-shaped pads 55, 55 of the pressing pad 41.

Further, as shown by the phantom line in FIG. 3, in the case of the container B ₄ in which the valve 71 is provided on the side surface of the container body, this container B ₄
Is placed on the movable table 65, and the pads 40a-4 of the receiving pad 40 are
The container B ₄ can be fixedly held by any one of 0c and the flat pads 56, 56 of the pressing pad 41, and the valve 71 can be attached and detached.

Effect of the Invention As described above, the valve attaching / detaching device of the present invention balances the moving base 10 to which the rotary drive device 13 is attached with a balancer such as the balance weight 6, and vertically slides the rotary spindle 18 of the rotary drive device 13. If you balance this with a spring balancer 29 or other balancer, only the inertial force due to the total weight of the rotary spindle 18 and the spanner 12 and other auxiliary devices will be applied when the spanner 12 is moved up and down. The fine adjustment of the vertical position of the spanner 12 connected to the can be performed very smoothly and easily, and the variation in the mounting position of the valve 71 can be absorbed and the spanner 12 can be efficiently attached and detached.

[Brief description of drawings]

1 is a partially longitudinal front view of a valve attaching / detaching device according to the present invention, FIG. 2 is a view taken along the line 2-2 of FIG. 1, and FIG. 3 is a line 3-3 of the FIG. FIG. 1 ... Base, 3 ... Struts 6 ... Balance weight, 7 ... Sprocket 8 ... Chain, 10 ... Moving base 12 ... Valve attaching / detaching spanner 13 ... Rotation drive device, 18 ... Rotating spindle 19 ...... Universal joint, 26 …… Load cell 29 …… Spring balancer 40 (40a-40c) …… Reception pad 41 (55,56) …… Pressing pad 60 …… Air cylinder

Claims (1)

[Scope of utility model registration request] 1. A clamp device for a high-pressure container to be mounted on the base is provided at the lower part of a column vertically installed on the base, while a rotary drive device for a valve attaching / detaching spanner is attached to the upper part of the column. A valve in which a table is arranged so as to be vertically movable along the support column via a balancer, and the detachable spanner is connected to the lower end of a rotary spindle rotated by the rotary drive device via a universal joint. An attachment / detachment device, wherein the rotation main shaft penetrates the rotation drive device, is arranged in parallel with the support column, and is attached so as to be vertically movable, and its upper end is attached to the movement table via a balancer. A valve attachment / detachment device for a high-pressure container, which is supported.