Deceleration controlling method for piston rod in pneumatic cylinder

[Detailed Description of the Invention]

[Industrial Application] This invention relates to the speed reduction control method of the piston rod in the slowdown distance at the time of making the speed of a piston rod shift to low-speed distance from high-speed distance in an air cylinder. Conventional technology] Although the exhaust side of an air cylinder is held to fixed pressure using a relief valve etc. and the slowdown at the time of making the speed of the piston rod of an air cylinder shift to a low speed from a high speed conventionally is performed, generally this method is difficult in an air circuit.

[Problem(s) to be Solved by the Invention] In an air cylinder, a slowdown of a piston rod can carry out easily and this invention offers a subject the speed reduction control method of the piston rod in the small air cylinder of a slowdown shock.

[Technical means for solving a subject] In the slowdown distance at the time of the invention of Mosquitoes making the speed of the piston rod of an air cylinder connected with load shift to low-speed distance from high-speed distance, in order to solve the above-mentioned subject, The flow of the air of Absorption of an air cylinder and the port of at least 1 side of exhaust air bow i~ was made into the flow and contrary of air at the time of the high-speed distance of a piston rod, and the pressure and flow time of adverse current air were made to correspond to the amount of kinetic energy of load, and are set up. 5 operation Co In the slowdown distance at the time of making the speed of the piston rod connected with load shift to low-speed distance from high-speed distance, Absorption of an air cylinder, and the flow of the air of the port of at least 1 side of an exhaust air boat, Since use the flow and contrary of air at the time of the high-speed distance of a piston rod, and the pressure and flow time of adverse current air are made to correspond to the amount of kinetic energy of load, namely, it is greatly set up when the amount of kinetic energy is large, a slowdown is performed effectively and there is little shocking generating.

[Example] The drawing in which an example is shown below explains this invention. The 1~3rd figure shows the 1st example. in the figure -- 1 -- an air cylinder -- 2 -- a piston -- 3 -- a piston rod -- 4 shows the head side port, 5 shows the rod side port, and W shows load, respectively. 7 is an air cylinder change-over valve, and is indicated in Japanese Patent Application No. No. 307186 [ 63 to ] concerning application of these people. in advance of explanation of the 1st example, Drawing 10 and Drawing 11 explain the composition of the above-mentioned air cylinder change-over valve (Most -- it is only called a change-over valve) 7, and an operation. In Drawing 10, the 1st pressure regulation piston 15 and the 2nd pressure regulation piston 16 are arranged in housing 8 of change-over valve 7, Between the 1st pressure regulation piston 15 and bottom walls 12 serves as pressure-receiving room 17, and, in between both pressure regulation pistons 15.16, between back pressure room 18, the 2nd pressure regulation piston 16, and housings 8 serves as adjustment room 19. It is provided in bottom wall 12 in middle flange 33, and, moreover, the bottom serves as atmospheric pressure room 42 and primary pressure room 38, respectively. Atmospheric pressure room 42 and primary pressure room 38 are open for free passage via secondary pressure room 37. Atmospheric pressure room 42 is open for free passage to the atmosphere via boat 42a, and secondary pressure room 37 is open for free passage in rod side port 61 of air cylinder 60 via secondary pressure room passage 49. - Next pressure room 38 is open for free passage to air supply 48. At the 1st pressure regulation piston 15, it takes in stem 46, and the 2nd valve element 41 adheres to One [Bread and stem 46. The 2nd valve element 41 opens for free passage or intercepts secondary pressure room 37 and atmospheric pressure room 42 by movement of the 1st pressure regulation piston 15. Next pressure room 38 and secondary pressure room 37 are having the free passage intercepted by the usual state by the 1st valve element 39 currently energized with the 1st valve element spring 43. If the crevice is provided between the 1st valve element 39 and the lower end of stem 46 and stem 46 descends with the 1st pressure regulation piston 15, the lower end of stem 46 will contact the 1st valve element 39, the elasticity of the 1st valve element spring 43 is resisted, the 1st valve element 39 is depressed, and - next pressure room 38 and secondary pressure room 37 are made to open for free passage. Secondary pressure room 37 can be opened for free passage in pressure-receiving room 17 via 50.3 points of secondary pressure room boat 1 A 2 position sky pressure electromagnetic valve (it is henceforth called 3 boat electromagnetic valve) 51, and pressure-receiving room port 52. The free passage of adjustment room 19 to 5 Vo 1 A 2 position sky pressure electromagnetic valve (it is henceforth called 5 port electromagnetic valve) 54 was attained via adjustment room boat 53, and 5 port electromagnetic valve 54 is connected to 3 port electromagnetic valve 51, and it is open for free passage to air supply 48. Pressure regulation of secondary pressure room 37 is performed by handle 22 and the 1st adjustment spring 24. Drawing 11 shows operation of change-over valve 7 typically. In the figure, if (b) shows the case where the rapid rise of the piston 63 of Drawing 10 is carried out and energizes it to 3 port electromagnetic valve 51.5 port electromagnetic valve 54, pressurization air will be introduced into adjustment room 19 from air supply 48 via 5 port electromagnetic valve 54, and it will depress the 2nd adjustment piston 16. The 1st pressure regulation piston 15 is depressed in connection with this, and the air of pressure-receiving room 17 is exhausted in the atmosphere through 3 port electromagnetic valve 51.5 port electromagnetic valve 54, It is depressed, primary pressure room 38 and secondary pressure room 37 are open for free passage, the air of air supply 48 is supplied to the rod side of air cylinder 60, and piston 63 carries out the rapid rise of the 1st valve element 39 with load W. The pressure of secondary pressure room 37 is equal to primary pressure. (Ro) When carrying out the low-speed rise of the piston 63, the case of a stop in the upper end of air cylinder 60 is shown, and make energization deenergization and 5 port electromagnetic valve 54 for 3 port electromagnetic valve 51. Pressurization air is introduced into adjustment room 19 from air supply 48 via 5 port electromagnetic valve 54 by this, and the 2nd pressure regulation piston 16 is depressed. In connection with this, the 1st pressure regulation piston 15 is depressed and opens pressure-receiving room 17 for free passage in secondary pressure room 37 via 3 port electromagnetic valve 51. Secondary pressure is adjusted to high pressure by the 1st adjustment spring 24, and stem 43 makes depression secondary pressure room 37 open the 1st valve element 39 for free passage via primary pressure room 38 and a small crevice for a while. Since the pressurization air of air supply 48 flows into boat 61 by the side of the rod of empty pressure cylinder 60 further gradually from primary pressure room 38 by this at secondary pressure room 37, bottle ton 63 carries out a slowdown rise, and arrives at a rise end. (C) The case where rapid descent of the piston 63 is carried out is shown, and make energization and 5 boat electromagnetic valve 54 into deenergization for 3 port electromagnetic valve 51. The pressurization air of air supply 48 passes 5 boat electromagnetic valve 54.3 boat electromagnetic valve 51 by this, it is introduced into pressure-receiving room 17, and the 1st pressure regulation piston 15 goes up. In connection with this, the 2nd valve element 41 goes up via stem 46, and secondary pressure room 37 and atmospheric pressure room 42 are open for free passage, Since - next pressure room 38 and secondary pressure room 37 are having the free passage intercepted by the 1st valve element 39 that has received the elasticity of the 1st valve element spring 43, the air in the cylinder room by the side of rod 64 of air cylinder 60 is quickly emitted into the atmosphere, and a piston dives. (D) The case where piston 63 is located in low-speed descent and a downward end is shown, and make both 3 port electromagnetic valve 51 and 5 boat electromagnetic valve 54 into deenergization. Thereby, the pressurization air of air supply 48 is not supplied to change-over valve 7, but secondary pressure room 37 is open for free passage in pressure-receiving room 17 via secondary pressure room boat 50.3 port electromagnetic valve 51 and pressure-receiving room boat 52. And secondary pressure is adjusted to low pressure by the 1st adjustment spring 24, and secondary pressure room 37 and atmospheric pressure room 42 open it for free passage via a small crevice, Since the air of air cylinder 60 is gradually emitted into the atmosphere through atmospheric pressure room 42 and boat 42a from secondary pressure room 37, piston 63 carries out slowdown descent and arrives at a descent end. In the 1st example, secondary pressure room passage 49 of air cylinder change-over valve 7 is connected with head side boat 4 of air cylinder 1, and rod side boat 5, respectively. In this case, the (a) figure 1 shows the high-speed distance of piston rod 3. In high-speed distance, change-over valve 7 of head side port 4 is held at the state of (b) of Drawing 11, and change-over valve 7 of rod side port 5 is held at the state of (C) of Drawing 11. That is, air is quickly supplied to the head side of air cylinder 1, and since air is quickly discharged from the rod side, piston rod 3 moves at high speed. (b) Drawing 2 shows the slowdown distance of piston rod 3. In slowdown distance, change-over valve 7 of head side port 4 is Drawing 11. (C) In (a), the direction of an air current is held at reverse] by A state @[slowdown exhaust air of (D) of the Co as the case of (a) with the same direction of an air current, or Drawing 11 by the state [slowdown air intake of (Ro) of] or Drawing 11 where the direction of an air current becomes a case of (a), and a contrary by state [urgency exhaust air, It corresponds to each state, such as this, respectively. Change-over valve 7 of lot side boat 5 is the direction of an air current (in a>, it is the direction of an air current (held at the state [the direction of an air current is the same as the case of (a) at slowdown exhaust air] of (D) of a>, reverse], or Drawing 11.) by the state [slowdown air intake of (Ro) of reverse] or Drawing 11) by the state [urgency air intake of (A) of Drawing 11. A slowdown is attained by an intersex crack and this operation when it is short to make the direction of the air style of the boat of at least 1 side of this operation, i.e., head side port 4, and rod side boat 5 into the direction and contrary of an air style of head side port 4 at the time of the high-speed distance of piston rod 3 and rod side boat 5. The size of the energy of movement of load W decides how to choose an above-mentioned combination and operating time of an operation mode of two change-over valves 7.7. time [ for example, ] the energy of movement of load is large -- change-over valve 7 of head side port 4 -- the -- short [ in change-over valve 7 of rod side boat 5 / in the state of (b) of Drawing 11 ] to the state of (C) of 11 figure -- time maintenance is carried out. Since a shock will generate the rate of a slowdown if deceleration time is shortened greatly again, cautions are required. (C) Drawing 3 shows the low-speed distance of piston rod 3. In low-speed distance, change-over valve 7 of head side port 4 is held at the state of (Ro) of Drawing 11, and change-over valve 7 of rod side port 5 is held at the state of (D) of Drawing 11. Slowdown supply of the air is carried out at the head side of Ubo air cylinder 1, and since slowdown discharge of the air is carried out from the rod side, piston rod 3 moves at a low speed. The 4~6th is the 2nd example, air cylinder 1 is arranged in the up-and-down direction, load W is attached to the lower end of piston rod 3, the case where load W is moved below is shown, Drawing 4 shows high-speed distance, Drawing 5 shows slowdown distance, and Drawing 6 shows low-speed distance, respectively. The switching control of change-over valve 7 in each distance is the same as the case of the 1st example. In the 4~6th figure, upper change-over valve 7 may be omitted like Drawing 10. The 7~9th is the 3rd example, air cylinder 1 is arranged in the up-and-down direction, load W is attached to the lower end of piston rod 3, the case where load W is moved up is shown, Drawing 7 shows high-speed distance, Drawing 8 shows slowdown distance, and Drawing 9 shows low-speed distance, respectively. In Drawing 7, change-over valve 7 of rod side port 5 is held at the state of (b) of Drawing 11, change-over valve 7 of head side port 4 is held again at the state of (C) of Drawing 11, respectively, and the flow of air becomes reverse in Drawing 1 of the 1st example. In Drawing 8.9, the flow of air becomes reverse in Drawing 2.3 of the 1st example similarly. In the 7~9th figure, upper change-over valve 7 may be omitted like Drawing 10. In each of above-mentioned examples, the change-over valve linked to head side port 4 of air cylinder 7 and rod side port 5 of not being limited to the thing of the form of the above-mentioned change-over valve 7 is natural. "-- EFFECT OF THE INVENTION --] In the slowdown distance at the time of this invention making the speed of the piston rod of an air cylinder connected with load as mentioned above shift to low-speed distance from high-speed distance, The direction of Absorption of an air cylinder, and the air style of the boat of at least 1 side of an exhaust air port, The direction and contrary of an air style at the time of the high-speed distance of a piston rod are used, and since the pressure and flow time of adverse current air are made to correspond to the amount of movement Energy of load and are set up, in the conventionally difficult air circuit, it becomes very easy in a slowdown of the piston rod of an air cylinder, And the small air cylinder of a slowdown shock is provided.

[Brief Description of the Drawings]

Drawing 1.2.3 shows the figure of the air cylinder of the high-speed distance of the 1st example, slowdown distance, and low-speed distance of operation, respectively. Drawing 4.5.6 shows the figure of the air cylinder of the high-speed distance of the 2nd example, slowdown distance, and low-speed distance of operation, respectively. Drawing 7.8.9 shows the figure of the air cylinder of the high-speed distance of the 3rd example, slowdown distance, and low-speed distance of operation, respectively. Drawing 10 shows an example of the change-over valve used for each of above-mentioned examples. Drawing 11 is a mimetic diagram showing the operation state of the change-over valve of Drawing 10. Sir O figure 1 ... Air cylinder 2 ... Piston 3 ... Piston rod 4 -.. The head side port (Absorption, exhaust air port) 5 ... The rod side port (Absorption and exhaust air port >7 ... air cylinder change-over valve)