KR102027881B1 - Pneumatically driven opening/closing apparatus for guard of cylinder - Google Patents

Abstract

The present invention relates to a pneumatically driven opening and closing apparatus of a guard for a cylinder, which comprises: a housing with open front end side; a rod guide arranged to close the front end side of the housing; a guard arranged to glide on the front end side of the housing; a fitting hole configured to supply the air to the front end side of the housing so that the guard can glide forward and backward with pneumatic pressure; and a spring arranged in the housing to elastically support the guard. The present invention is configured to enable the guard that protects a connector coupled to a valve of the cylinder to reciprocate with pneumatic pressure.

Description

Pneumatically driven opening / closing apparatus for guard of cylinder}

The present invention relates to a pneumatically actuated switchgear of a cylinder guard, and more particularly to a switchgear that enables a reciprocating movement of a guard protecting a connector coupled to a valve of a cylinder.

In general, a large amount of high-purity process gas is used in manufacturing processes such as semiconductors and flat panel displays. Process gases can be used in a series of processes, such as, for example, deposition, etching, and may also be supplied to maintain process stability.

Such a process gas can be safely and accurately supplied to the manufacturing process of semiconductors, flat panel displays, and the like through a gas cabinet at a suitable pressure. The gas cabinet includes a cylinder for storing the process gas, a supply line for drawing the process gas stored in the cylinder and supplying the process gas to the process line, a purge line for purifying gas remaining on the supply line, and the like. . As is well known to those skilled in the art, the cylinder is connected in fluid communication with the supply line by means of a connector to the outlet port of the valve, wherein the process gas stored in the cylinder is transferred to a predetermined process via the process line and the control valve. Can be supplied. The connector may be a commercially available cylinder gas adapter (CGA).

Typically, the cylinder may be a high pressure compressed gas cylinder, and the process gas charged inside the cylinder is stored at a very high pressure, as described above, which poses a potential risk. If the cylinder gas adapter is loosened by an unauthorized person, process gas discharged to the outside through the valve of the cylinder may threaten the corrosion of the peripheral device and the operator's safety.

For this purpose, Patent Literature 1 protects the valve by attaching a guard to the gas cylinder assembly including the gas cylinder body and the valve. The guard of patent document 1 is comprised by the annular structure which surrounds the neck of a valve and a gas cylinder main body. As a result, the operator has no choice but to disassemble the guard in order to separate the supply line (eg, hose or pipe) from the valve for replacement of the gas cylinder, and has a complicated structure.

Republic of Korea Patent Publication No. 10-2016-0038893

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and selectively protects the connector which connects the valve of the cylinder and the supply line in fluid communication, for example, a guard that prevents unnecessary access of the connector from external factors by overlying the cylinder gas adapter. It aims at opening and closing.

In addition, this invention is comprised so that a guard opening / closing apparatus can be operated pneumatically.

In order to achieve the above object, the pneumatically actuated switchgear of the guard for the cylinder according to a preferred embodiment of the present invention protects the connector communicating between the cylinder storing the process gas and the supply line for guiding the process gas to the rear end equipment. A plate configured to reciprocately move the guard, the cover having a concave receiving groove, a cover extending from the rear of the plate to the rear lengthwise to cover the connector, and disposed in the tube axis direction from the rear of the plate A guard having a piston formed of a piston rod and a piston head; Fitting port provided at the end of the air hose for supplying air pressure; The hollow tubular part which forms an opening part on the front end side in the tube axis direction, and is closed by the rear part on the rear end side, and is limited to this tubular part and the rear part, and is provided to the pneumatic operation chamber for reversing on the front end side by the piston head and the rear end side. A housing having a pneumatic operation chamber partitioned by a forward pneumatic operation chamber; Positioned at the front end of the housing, the through-hole drilled in the tube axis direction so as to slide the piston rod, the fastening hole for engaging the fitting hole, and the pneumatic pressure to communicate the fastening hole to the reverse pneumatic operation chamber of the housing A rod guide having a guide hole; And a spring disposed in the forward pneumatic operation chamber of the housing, the spring supporting the piston toward the front end of the housing. Here, the guard is reciprocated back and forth from the front end of the housing by means of a pneumatic to be supplied into the reverse pneumatic operation chamber and a spring disposed in the forward pneumatic operation chamber to allow or block access to the connector coupled to the cylinder. Characterized in that.

In the present invention, the housing may form an exhaust hole in the rear portion. This can ensure the smooth retraction movement of the guard because it can discharge the internal air filled in the forward pneumatic operation chamber to the outside during pneumatic supply.

The present invention can coaxially arrange the through hole, the opening and the pneumatic operation chamber for the forward and backward reciprocating movement of the piston in the interior of the housing (pneumatic operation chamber) and the through hole of the rod guide.

The present invention forms an insertion hole in the tube guide so as not to overlap with the housing in the rod guide, the guard may be provided with a guide pin lengthwise extended in the tube axis direction from the back of the plate corresponding to the insertion hole.

In addition, the guide pin may be extended in parallel with the piston and / or the cover.

The pneumatically driven switchgear of the guard for the cylinder according to the present invention can couple the housing to the supply line via a clamp. Optionally, the clamp comprises a first holder portion having a first seating groove to assist mounting of the supply line and positioned on an outer circumferential surface of the tubular portion; And a second holder portion hinged to the first holder portion and having a second seating groove to assist mounting of the supply line.

In another embodiment of the present invention, the housing may further perforate the discharge hole in the tubular portion, more specifically in the side surface of the tubular portion to discharge the pneumatic pressure filled in the reverse pneumatic operation chamber to the outside.

Preferably, the present invention provides a retracting stroke distance of the piston such that the separation distance from the inner surface of the rear portion of the tubular portion of the piston to the discharge hole is greater than or equal to the sum of the thickness of the piston head and the maximum compression length of the spring. You can limit it.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, the terms or words used in this specification and claims are not to be interpreted in a conventional and dictionary sense, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

According to the description of the present invention, the present invention is provided to reciprocate the guard for protecting the connector in communication with the valve of the cylinder and the supply line by means of pneumatic force and the spring force of the spring.

The present invention can provide a pneumatic to move the guard retreat, and in normal times without providing the pneumatic can be arranged to advance the guard through the spring force of the spring to prevent the connector from contacting the outside. That is, the present invention is configured to move the guard forward on the connector to disallow access of the connector and to move the guard back out of the connector to allow access of the connector.

As described above, the present invention consists of a simple configuration using pneumatic pressure and spring force.

1 is a perspective view of a pneumatically driven switchgear of a guard for a cylinder according to a preferred embodiment of the present invention from the front side, showing a state in which the guard is placed forward.
2 is a cross-sectional view schematically showing a pneumatically driven switchgear of the cylinder guard shown in FIG.
3 is an exploded perspective view of a pneumatically driven switchgear of a guard for a cylinder according to a preferred embodiment of the present invention.
Figure 4 is a perspective view of the pneumatically driven switchgear of the guard for the cylinder shown in Figure 1 seen from the rear side.
Fig. 5 is a side view schematically showing the pneumatically driven switchgear of the guard for a cylinder of the present invention with the guard forwardly disposed on the connector of the cylinder.
FIG. 6 is a perspective view of the pneumatically driven switchgear of the guard for a cylinder according to the preferred embodiment of the present invention, viewed from the front side, illustrating a state in which the guard is disposed backward.
FIG. 7 is a schematic cross-sectional view of a pneumatically driven switchgear of the cylinder guard shown in FIG. 6.
Fig. 8 is a side view schematically showing the pneumatically actuated switchgear of the guard for a cylinder of the present invention with the guard retracted on the connector of the cylinder.
9 is a schematic cross-sectional view of a pneumatically driven switchgear of a guard for a cylinder according to another embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and embodiments associated with the accompanying drawings. In the present specification, in adding reference numerals to the components of each drawing, it should be noted that the same components, even if displayed on the other drawings have the same number as possible. In addition, in describing the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In this specification, the terms first, second, etc. are used to distinguish one component from another component, and a component is not limited by the terms. In the accompanying drawings, some components are exaggerated, omitted, or schematically illustrated, and the size of each component does not fully reflect the actual size.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is configured to selectively allow or block the access of a connector, such as a cylinder gas adapter (CGA), to fluidly connect a supply line to a valve of a cylinder. Herein, the present invention may be applied to a connector coupled to a cylinder included in a gas cabinet, but is not limited thereto, and may be applicable to any connector communicating between a high pressure vessel and a supply line.

In particular, the present invention can advance the guard of the switchgear through pneumatic or retract the guard of the switchgear through the spring force, the pneumatic pressure to provide a sliding movement of the guard can be provided through a variety of sources, for example Compressed air generated by an air compressor provided in the gas cabinet, purge gas supplied to the purge line, or the like may be used.

1 to 8, the pneumatically-driven opening and closing device (hereinafter, the guard opening and closing device) of the guard for the cylinder according to a preferred embodiment of the present invention is a housing 100, the housing 100 is open to the front end, the housing 100 A rod guide (200; rod guide) arranged to seal the front end of the guard, a guard (300) slidably arranged at the front end of the housing (100), and the slide (300) can be slidably moved forward and backward in a pneumatic manner. Fitting fitting 400 for supplying air to the front end side of the housing 100, and a spring 500 disposed inside the housing 100 so as to support the guard 300 in a shot. The present invention is capable of reciprocating the guard as described above through the repulsive force of pneumatics and springs, and between the pneumatic operating chamber of the housing and the piston head and rod guides to ensure reliable retraction movement of the guard through pneumatics. It is obvious that the seal must be sealed to prevent pneumatic leakage between the through hole and the piston rod.

In addition, the present invention provides a clamp that couples the process gas charged inside the cylinder C to the supply line L, which guides the process gas filled in the cylinder C to the rear end facility so that it can be securely positioned on the connector A coupled to the cylinder C. 600 may be provided.

The housing 100 opens the front side as described above, the hollow tubular portion 110, the opening 120, which allows access to the inside of the tubular portion 110, the tube It includes a rear portion 130 for sealing the rear end side of the shape portion 110, and a pneumatic operation chamber 140 defined by the tubular portion 110 and the rear portion 130. As shown, the pneumatic operation chamber 140 can accommodate the free end of the piston 330 and the spring 500 therein. The piston 330 may retreat from the pneumatic operation chamber 140 to the supply of pneumatic pressure along the tubular direction (or longitudinal direction) of the housing. Here, the pneumatic operation chamber 140 forms the reverse pneumatic operation chamber 140a on the front end side by the piston head 332 and forms the forward pneumatic operation chamber 140b on the rear end side. A spring 500 is disposed in the forward pneumatic operation chamber 140b. When the piston 330 cuts off the supply of pneumatic pressure, the piston 330 moves forward by the spring force in the pneumatic operation chamber 140 along the tube axis direction of the housing.

Preferably, the housing 100 arranges the exhaust hole 131 in the rear portion 130. The exhaust hole 131 may discharge the internal air to the outside of the housing in the forward pneumatic operation chamber 140b when the guard 300 moves backward.

The rod guide 200 is a constituent member for guiding the axial movement of the piston 330 protruding outward from the pneumatic operation chamber 140 of the housing. The rod guide 200 is disposed in the opening 120 of the housing 100 to provide a pneumatic operation chamber. Not only the front end side of the 140 may be sealed, but also the separation of the piston 300 may be prevented. The rod guide 200 may be coupled to the opening 120 of the housing 100 to maintain an airtight state in various ways such as a welding method and a bolting method.

In detail, the rod guide 200 includes a through hole 210 to allow the piston 330 to enter the housing, a fastening hole 220 to help the fitting hole 400 to be fastened, and the fastening hole 220. The pneumatic guide hole 230 is extended to the inner surface of the rod guide 200. The through hole 210 drills in the thickness direction in the inner region of the rod guide 200, that is, in the tube axis direction of the housing. Preferably, the present invention arranges the through hole 210 of the rod guide 200 and the opening 120 of the housing 100 and the pneumatic operation chamber 140 of the housing in a coaxial line, thereby reciprocating the piston. Guaranteed.

The fastening hole 220 accommodates the fitting hole 400 disposed at the end of the air hose H. The male hole is formed on the outer circumferential surface of the fitting hole 400 and the female hole is formed on the inner circumferential surface of the fastening hole 220 to correspond thereto. Threads can be formed and bolted together. The rod guide 200 may form a fastening hole 220 in the upper protrusion so as to securely support the fitting hole 400, thereby arranging the fastening hole 220 so as not to communicate with the through hole 210. Can be. Fastening hole 220 may be formed toward the inside of the rod guide in a direction orthogonal to the tube axis direction of the housing from the upper protrusion as shown. Pneumatic pressure provided from the air hose (H) is passed through the fastening hole 220 and the pneumatic guide hole 230 to the pneumatic operation chamber 140 of the housing 100, specifically, the pneumatic operation chamber 140a for the reverse piston 330 is forcibly pushed toward the rear end side to facilitate the retreat movement of the guard 300.

The pneumatic guide hole 230 communicates the fastening hole 220 and the pneumatic operation chamber 140 as shown, one end of the pneumatic guide hole 230 is disposed in the fastening hole 220 while the pneumatic guide hole 230 The other end of) may be located inside the opening 120 of the housing 100. That is, the other end of the pneumatic guide hole 230 is formed on the inner surface of the rod guide 200 facing the opening 120 of the housing 100.

In addition, the rod guide 200 may further include an insertion hole 240 formed in the tube axis direction at the upper protrusion that does not overlap with the housing 100.

The guard 300 is arranged to overlap on the connector (A) coupled to the cylinder (C) as described above to block access to the connector or to retract so as not to overlap the connector (A) to allow access to the connector. It is provided so that it can slide. To this end, the guard 300 includes a plate 310 having a concave accommodating groove 311, a cover 320 extending lengthwise along the periphery of the concave accommodating groove 311, and a plate 310. Piston 330 extending from the rear of the rear toward the rear. As shown, the cover 320 and the piston 330 may be disposed in the tube axis direction side by side at the rear of the plate 310. When the cover 320 of the guard 300 is disposed to move forward as shown in FIG. 5, the cover 320 of the guard 300 may be disposed on the connector A to prevent the connector from being exposed. When the retracted arrangement as shown in FIG. 8 moves to the rear side of the connector A to allow access to the connector.

The piston 330 includes a piston rod 331 and a piston head 332. The piston rod 331 is coupled to the rear surface of the plate 310 and extends in the tubular direction, and the piston rod 331 is inserted into the pneumatic operation chamber 140 across the through hole 210 of the rod guide 220. Can be. To this end, the outer diameter of the piston rod 331 is the same as the inner diameter of the through hole 210 but has a size slightly smaller. The piston head 332 is disposed at the other end of the piston rod 331 disposed in the pneumatic operation chamber 140 of the housing, and the pneumatic operation chamber is replaced by the reverse pneumatic operation chamber 140a and the forward pneumatic operation chamber 140b. Partition into

In order to prevent the detachment of the guard from the housing 100 during the forward movement of the guard 300 in the embodiment of the present invention, the outer diameter of the piston head 332 has the same or slightly smaller size than the inner diameter of the pneumatic operation chamber 140 It should be larger than the inner diameter of the through hole.

In addition, the guard 300 may further include a guide pin 340 extending in the tubular direction of the housing in parallel with the cover 320 or the piston 330 at the rear of the plate 310. The guide pin 340 extends from the rear surface of the plate corresponding to the insertion hole 240 of the rod guide 200.

As shown, the spring 500 is disposed in the interior of the housing, that is, the forward pneumatic operation chamber 140b of the pneumatic operation chamber 140. In other words, the spring 500 may be interposed between the piston head 332 disposed in the housing 100 and the rear portion 130 of the housing 100.

Optionally, the spring 500 may be a coil spring.

The piston 330 is advanced as the spring force of the spring 500 when a separate external force (for example, pneumatic) is not applied to the guard opening and closing device according to the present invention as described above.

Optionally, the guard opening and closing device of the present invention may further include a clamp 600 to be positioned adjacent to the connector A of the cylinder C. The clamp 600 is disposed on the outer circumferential surface of the tubular portion 110 of the housing 100, the clamp 600 withdraws the process gas stored in the cylinder through the connector (A) to the rear end equipment, such as a process By firmly holding the supply line (L) to feed the line to help the guard opening and closing device of the present invention can be placed on the connector of the cylinder. Optionally, the supply line L may be a pigtail of a gas cabinet.

The clamp 600 includes a first holder part 610 fixed to an outer circumferential surface of the tubular part 110 of the housing 100, and a second holder part 620 hinged to the first holder part 610. It includes. The first holder part 610 may be fixed to the tubular part 110 by various fastening methods such as welding, bolting, or the like, and may be integrally formed with the tubular part to improve durability. The first holder part 610 includes a first seating groove 611 on which a supply line L may be mounted on a surface corresponding to the second holder part 620. Correspondingly, the second holder part 620 includes a second seating groove 621 on which a supply line L may be mounted on a corresponding surface in contact with the first holder part 610. The clamp 600 arranges the supply line L in the first and second seating grooves 611 and 621, and fixes the second holder part 620 to the first holder part 610 by a bolting method or the like. You can surely grasp).

The pneumatically driven switchgear of the guard for the cylinder according to the preferred embodiment of the present invention can be operated in the following manner.

If the operator wants to disconnect the supply line (L) from the connector (A) coupled to the cylinder (C), the guard with respect to the housing (100) positioned in the supply line (L) to access the connector (A) Force 300 to retreat.

To this end, the operator controls the piping system of the gas cabinet to be provided with pneumatic pressure through the air hose (H) into the housing (100). Pneumatic pressure is guided through the fastening hole 220 and the pneumatic guide hole 230 of the rod guide 200 to the pneumatic operation chamber 140 of the housing 100, specifically, the pneumatic operation chamber 140a for the reverse. The present invention forcibly pushes the piston to the rear end side of the housing by means of pneumatic flow introduced into the housing. The forward pneumatic operation chamber 140a is discharged to the atmosphere through the exhaust hole 131 while the internal air charged therein is reduced in volume through the backward movement of the piston.

Subordinate to the retraction movement of the piston, the guard 300 of the present invention may be retracted as a whole to displace the cover 320 rearward on the connector to expose the connector outside. At this time, the guide pin 340 slides to the rear end side in the insertion hole 240, the guard 300 helps to move backwards along the tube axis direction of the housing without unnecessary swing.

After completing the operation of the connector, the operator controls the piping system of the gas cabinet to cut off the air pressure to be supplied to the air hose (H). The piston 330 disposed in the housing 100 forcibly pushes the piston 330 toward the front end of the housing through the elastic restoring force of the spring 500 while the external force caused by the pneumatic pressure is removed.

Dependent on the forward movement of the piston, the guard 300 of the present invention is moved forward as a whole to cover the connector with the cover 320 to disallow access to the connector.

A pneumatically actuated opening and closing device for a guard for a cylinder according to another embodiment of the present invention is schematically illustrated in FIG. 9. The pneumatically driven switchgear of the guard for the cylinder according to another embodiment of the present invention is a modification of the pneumatically driven switchgear of the guard shown in Figures 1 to 8, except that the configuration of the housing 100 is very similar Because of the structure, a description of similar or identical constituent members will be excluded here for the sake of clarity of understanding of the present invention.

As shown, the pneumatically actuated opening and closing device of the guard for the cylinder according to another embodiment of the present invention is a pneumatic operation chamber (at the side of the housing 100 to discharge the air pressure from the reverse pneumatic operation chamber 140a to the outside) 140 and punctures the discharge hole 111 in fluid communication with the outside.

For example, the pneumatically actuated opening and closing device for a cylinder guard according to another embodiment of the present invention provides pneumatic pressure into the housing to enable the retraction movement of the piston 330. By repeatedly supplying and shutting off the pneumatic, the piston 330 moves forward and / or retracted along the tube axis direction of the housing, and the piston head 332 is brought into contact with both ends of the spring due to the repeated stress concentration of the spring 500. ) And a high possibility of causing damage to the rear portion 130. In addition, due to the retraction movement of the piston hit the piston head 3320 and the rear portion 130 which both ends of the spring contact it may cause vibration and noise.

Accordingly, the present invention punctures the discharge hole 111 in the side surface portion of the tubular portion so as to reduce the impact force on the spring or the rear surface by the reciprocating movement of the piston by adjusting the retraction stroke distance of the piston. The piston is retracted and moved along the inside of the pneumatic operation chamber of the housing while increasing the volume volume of the reverse pneumatic operation chamber (140a) by pneumatic, when the reverse pneumatic operation chamber (140a) is extended to the rear end side than the discharge hole 111 It is possible to quickly discharge the air pressure continuously supplied through the discharge hole 111 to the outside. This may eliminate excessive pneumatics in the housing and limit the retract stroke distance of the piston 330.

That is, in another embodiment of the present invention, the distance (D) from the inner surface of the rear portion 130 to the discharge hole 111 is the maximum compression of the thickness (T ₃ ) and the spring 500 of the piston head 332 It must be equal to or greater than the sum of the lengths T ₅ ; see FIG. 7.

Although the present invention has been described in detail through the embodiments, this is for explaining the present invention in detail, the pneumatically-driven opening and closing device of the guard for the cylinder according to the present invention is not limited thereto, and it is within the technical spirit of the present invention. It will be apparent that modifications and improvements are possible by those skilled in the art.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of the present invention will be apparent from the appended claims.

100 ----- housing,
200 ----- road guide,
300 ----- guard,
400 ----- fitting hole,
500 ----- spring,
600 ----- clamp,
A ----- connector,
C ----- cylinder,
H ----- air hose,
L ----- Supply Line.

Claims (8)

In the guard which protects the connector A which communicates between the cylinder C which stored the process gas, and the supply line L which guides the said process gas to a back-end installation,
A plate 310 having a concave receiving groove 311 and a cover 320 extending from the rear of the plate 310 along the periphery of the receiving groove 311 to cover the connector A. A guard 300 having a piston 330 formed in a tubular direction from a rear surface of the plate 310 and formed of a piston rod 331 and a piston head 332;
Fitting port 400 provided at the end of the air hose (H) for supplying air pressure;
It is limited to the hollow tubular portion 110, the tubular portion 110 and the rear portion 130 is formed in the tubular direction in the open side 120 is formed on the front end side and closed on the rear end 130 on the rear end side. A housing 100 having a pneumatic operation chamber 140 partitioned by the piston head 332 into a reverse pneumatic operation chamber 140a at a front end side and a forward pneumatic operation chamber 140b at a rear end side thereof;
The fastening hole 220 is fixed to the front end of the housing 100, the through-hole 210 and the fitting hole 400 to be drilled in the tubular direction to allow the sliding movement of the piston rod (331) And a rod guide (200) in communication with the fastening hole (220) and having a pneumatic guide hole (230) for guiding the pneumatic pressure to the reverse pneumatic operation chamber (140a) of the housing (100). And
It is disposed in the forward pneumatic operation chamber (140a) of the housing 100, the spring 500 for supporting the piston 330 to the front end side of the housing 100;
The guard 300 reciprocates in the front-rear direction from the front end side of the housing 100 by means of a pneumatic pressure to be supplied into the reverse pneumatic operation chamber and a spring disposed in the forward pneumatic operation chamber, so that the cylinder ( A pneumatically actuated opening and closing device for a cylinder guard, characterized in that to allow or block access to the connector (A) coupled to C).
The method according to claim 1,
The housing 100 is a pneumatically driven opening and closing device for a cylinder guard, characterized in that for forming the exhaust hole (131) in the rear portion (130).
The method according to claim 1,
The through-hole 210, the opening portion 120 and the pneumatic operation chamber 140 is a pneumatically actuated opening and closing device for a cylinder guard, characterized in that arranged in a coaxial line.
The method according to claim 1,
The rod guide 200 forms an insertion hole 240 in the tube axis direction so as not to overlap with the housing 100,
The guard 300 is a pneumatically-driven opening and closing device of the cylinder guard, characterized in that it comprises a guide pin 340 extending in the tube axis direction from the back of the plate 310 corresponding to the insertion hole 240 .
The method according to claim 4,
The guide pin (340) is a pneumatically actuated opening and closing device of the cylinder guard, characterized in that the length is extended in parallel with the piston (330) or the cover (320).
The method according to claim 1,
The housing 100 is coupled to the supply line (L) through the clamp 600,
The clamp 600,
A first holder part 610 having a first seating groove 611 to assist mounting of the supply line L and fixed to an outer circumferential surface of the tubular part 110;
And a second holder part 620 having a second seating groove 621 to assist the mounting of the supply line L, and hinged to the first holder part 610. Pneumatically Actuated Switchgear.
The method according to claim 1,
The housing 100 is a pneumatically-driven opening and closing device of the cylinder guard, characterized in that for further drilling the discharge hole 111 in the side portion of the tubular portion (110).
The method according to claim 7,
The distance D from the inner surface of the rear portion of the tubular portion 110 to the discharge hole 111 is the thickness T ₃ of the piston head 332 and the maximum compression length of the spring 500. A pneumatically actuated switchgear of a cylinder guard, having a size greater than or equal to the sum of (T ₅ ).

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