Safety Pin

Abstract

A safety pin is provided and which comprises a cylinder having a first port and a second port arranged in longitudinal ends. A piston is moveably disposed within the cylinder and dividing the cylinder into a first chamber in communication with the first port and a second chamber in communication with the second port. A dowel pin is securely attached to the piston. An adjusting device regulates the position of the piston along a position perpendicular to the first and second directions. And a supplying device directing compressed air to the first chamber through the first port, or directing the compressed air to the second chamber through the second port so as to push the piston and the dowel pin to move along the first direction so as for performing locking and unlocking the equipment. By this arrangement, equipment can be readily locked up and unlocked by the provision of the safety pin.

1 . A safety pin, comprising:
 a cylinder having a first port and a second port arranged in longitudinal ends;   a piston moveably disposed within the cylinder and dividing the cylinder into a first chamber in communication with the first port and a second chamber in communication with the second port;   a dowel pin securely attached to the piston;   an adjusting device regulating the position of the piston along a position perpendicular to the first and second directions, the adjusting device including a platform, a pulling device, a driving device and a guiderail system, wherein the cylinder is installed onto the platform, wherein the pulling device is interlinked to the platform and the driving device, wherein the position of the platform can be readily along the second direction by the driving device through the pulling device, wherein the guiderail system is arranged along the second direction, wherein the platform is driven to move along the second direction along the guiderail system; and   a supplying device directing compressed air to the first chamber through the first port, or directing the compressed air to the second chamber through the second port so as to push the piston and the dowel pin to move along the first direction so as for performing locking and unlocking the equipment.   
     
     
         2 . The safety pin as recited in  claim 1 , characterized in that the first direction is a horizontal direction, and the second direction is a vertical direction. 
     
     
         3 . The safety pin as recited in  claim 2 , characterized in that the driving device is a motor, and the pulling device is a cable. 
     
     
         4 . The safety pin as recited in  claim 2 , characterized in that the safety pin further comprises a switching valve installed on the platform, and which includes a third port in communication with the first port, and a fourth port in communication with the second port, an inlet and an outlet, wherein the inlet is interconnected to the supplying device, and the switching valve selectively interconnect the third port and the forth port to the inlet and the outlet, respectively. 
     
     
         5 . The safety pin as recited in  claim 4 , wherein the switching valve interconnects the third port to the inlet, and the fourth port to the outlet under the first situation, and interconnects the third port to the outlet and the fourth port to the inlet under the second situation. 
     
     
         6 . The safety pin as recited in  claim 5 , characterized in that the pin further includes a bracket to support the dowel pin, the safety pin projects out of the bracket under the first situation so as to lockup the equipment. 
     
     
         7 . The safety pin as recited in  claim 6 , wherein the safety pin retracts into of the bracket under the second situation so as to unlock the equipment. 
     
     
         8 . The safety pin as recited in  claim 7 , wherein the bracket is defined with a plurality of through holes along the second direction, wherein the dowel pin moveably disposed within the thorough hole under the first situation, and the dowel pin is out of the hole under the second situation. 
     
     
         9 . A safety pin, comprising:
 a cylinder having a first port and a second port arranged in longitudinal ends;   a piston moveably disposed within the cylinder and dividing the cylinder into a first chamber in communication with the first port and a second chamber in communication with the second port;   a dowel pin securely attached to the piston;   an adjusting device regulating the position of the piston along a position perpendicular to the first and second directions; and   a supplying device directing compressed air to the first chamber through the first port, or directing the compressed air to the second chamber through the second port so as to push the piston and the dowel pin to move along the first direction so as for performing locking and unlocking the equipment.   
     
     
         10 . The safety pin as recited in  claim 9 , characterized in that the first direction is a horizontal direction, and the second direction is a vertical direction. 
     
     
         11 . The safety pin as recited in  claim 10 , characterized in that the adjusting device including a platform, a pulling device and a driving device, wherein the cylinder is installed onto the platform, wherein the pulling device is interlinked to the platform and the driving device, wherein the position of the platform can be readily along the second direction by the driving device through the pulling device. 
     
     
         12 . The safety pin as recited in  claim 11 , characterized in that the adjusting device further includes a guiderail system which is arranged along the second direction, wherein the platform is driven to move along the second direction along the guiderail system. 
     
     
         13 . The safety pin as recited in  claim 11 , characterized in that the driving device is a motor, and the pulling device is a cable. 
     
     
         14 . The safety pin as recited in  claim 11 , characterized in that the safety pin further comprises a switching valve installed on the platform, and which includes a third port in communication with the first port, and a fourth port in communication with the second port, an inlet and an outlet, wherein the inlet is interconnected to the supplying device, and the switching valve selectively interconnect the third port and the forth port to the inlet and the outlet, respectively. 
     
     
         15 . The safety pin as recited in  claim 14 , wherein the switching valve interconnects the third port to the inlet, and the fourth port to the outlet under the first situation, and interconnects the third port to the outlet and the fourth port to the inlet under the second situation. 
     
     
         16 . The safety pin as recited in  claim 15 , characterized in that the pin further includes a bracket to support the dowel pin, the safety pin projects out of the bracket under the first situation so as to lockup the equipment. 
     
     
         17 . The safety pin as recited in  claim 6 , wherein the safety pin retracts into of the bracket under the second situation so as to unlock the equipment. 
     
     
         18 . The safety pin as recited in  claim 17 , wherein the bracket is defined with a plurality of through holes along the second direction, wherein the dowel pin moveably disposed within the thorough hole under the first situation, and the dowel pin is out of the hole under the second situation.