JP4291303B2 - Actuator with rod - Google Patents

Description

  The present invention relates to an actuator with a rod that includes a rod that protrudes and protrudes from an end surface of an actuator main body, and includes an end plate at a protruding end of the rod from the actuator main body.

  As a fluid pressure cylinder as an actuator with a rod, for example, the one described in Patent Document 1 is known. In the fluid pressure cylinder, a piston is accommodated in a cylinder hole of a cylinder case, and a rod is fixed to the piston. An end plate is fixed to the protruding end of the rod, and the end plate is fixed to the equipment.

  In the fluid pressure cylinder, an external scraper is mounted on the surface of the cylinder case on the rod protruding side. A rod is inserted through the rod insertion hole at the center of the external scraper. The peripheral surface of the rod insertion hole is always in sliding contact with the outer peripheral surface of the rod so as to scrape off foreign matter adhering to the outer peripheral surface of the rod. The foreign matter scraped off by the external scraper is accumulated in a gap interposed between the external scraper and the cylinder case.

A coil scraper is accommodated in the rod cover that closes the rod protruding side opening of the cylinder hole. The coil scraper is always in sliding contact with the outer peripheral surface of the rod and scrapes off foreign matter adhering to the outer peripheral surface of the rod. And the foreign material which cannot be scraped off by the external scraper but has reached the inside of the cylinder case from the external scraper is scraped off by the coil scraper.
JP-A-11-311210

  By the way, in the fluid pressure cylinder described in Patent Document 1, the external scraper is screwed into bolts from through holes formed at the four corners of the external scraper into through holes formed in the rod protruding side surface. Is attached to the surface of the rod protruding side. An end plate fixed to the protruding end of the rod is positioned above the external scraper, and the end plate is fixed to the equipment.

  For this reason, for example, in order to remove foreign matter accumulated in the gap, even if the bolt is removed from the through hole and the mounting hole and the external scraper is removed from the cylinder case, the end plate becomes an obstacle, and the bolt is removed. And the removal work of the external scraper cannot be performed easily. Therefore, the fluid pressure cylinder described in Patent Document 1 has a problem that the maintainability of the fluid pressure cylinder including foreign matter removal is very poor.

  The present invention has been made by paying attention to such problems existing in the prior art, and an object of the present invention is to provide an actuator with a rod that can improve maintainability.

In order to solve the above-mentioned problems, the invention according to claim 1 is an actuator with a rod that includes a rod that protrudes and protrudes from an end face of the actuator body, and an end plate at a protruding end of the rod from the actuator body. A concave portion surrounding the periphery of the rod is provided at a position where the rod is disposed on the end surface, and a sliding contact member that is detachably attached to the concave portion and slidably contacts the peripheral surface of the rod; A rod is inserted and movable along the axial direction of the rod. The rod is mounted on the end surface to hold the sliding contact member in the recess, and is in a non-mounted state spaced from the end surface. And a mounting means for mounting the plate on the end face, and the plate can take the mounting state and the non-mounting state by operating the mounting means. Has become earthenware pots, the direction in which the operation the attachment means to said mounting state and the non-attached state, and the gist that a direction perpendicular to the axial direction of the rod.

  According to a second aspect of the present invention, in the actuator with a rod according to the first aspect, the mounting means is inserted into a groove formed in the plate, a groove formed in the actuator body, and the both grooves. A plate nut, a mounting screw that can be screwed to the plate nut, and a locking portion formed in both grooves, and the plate is screwed into the plate nut so that the plate nut is While being in the mounting state by being locked to the locking portion, the mounting screw is screwed out from the plate nut to be in the non-mounting state, and the screwing direction of the mounting screw is the axial direction of the rod The gist is that it is set in a direction orthogonal to the direction.

  According to a third aspect of the present invention, in the actuator with a rod according to the second aspect, the actuator body is a cylinder case, and the rod moves based on a fluid pressure acting on a piston housed in the cylinder case. The gist of the actuator main body is a switch groove for mounting a position detection switch for detecting the position of the piston attached to the rod in the cylinder case.

  According to a fourth aspect of the present invention, in the actuator with a rod according to the first aspect, the mounting means includes an L-shaped bracket attached to the plate and a groove into which the L-shaped bracket is inserted in the actuator body. And a screw threaded into the groove and a bolt that can be threaded into the screw thread through the L-shaped metal fitting, and the plate penetrates the L-shaped metal fitting and the screw thread. The bolt is screwed into the mounting state, while the bolt is screwed out of the screw thread to be in the non-mounting state, and the screwing direction of the bolt is perpendicular to the axial direction of the rod. The gist is that the direction is set.

  According to a fifth aspect of the present invention, in the actuator with a rod according to any one of the first to fourth aspects, the plate is provided with a scraper that scrapes off the foreign matter adhering to the peripheral surface of the rod. It is the gist.

  According to the present invention, maintainability can be improved.

(First embodiment)
A first embodiment in which an actuator with a rod according to the present invention is embodied in a pneumatic cylinder will be described below with reference to FIGS. In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” of the pneumatic cylinder 11 refer to the direction of the arrow Y1 shown in FIG. The direction of the arrow Y3 is the up-down direction.

  As shown in FIG. 1, a pneumatic cylinder 11 as an actuator with a rod includes a cylinder case 12 as an actuator body, and a plate 43 attached to an upper end surface 12a (see FIG. 2) as an end surface of the cylinder case 12. ing.

  First, the cylinder case 12 will be described. The cylinder case 12 is a cylinder tube made of a metal extruded material such as aluminum, and has a rectangular parallelepiped shape in plan view. As shown in FIG. 2, a cylinder hole 13 having a circular cross section extending along the vertical direction of the cylinder case 12 is formed at the center of the long side direction (left and right direction in FIG. 2) of the upper end surface 12 a of the cylinder case 12. ing. One (upper) opening of the cylinder hole 13 is sealed by the rod cover 14, and the other (lower) opening of the cylinder hole 13 is sealed by the head cover 15. The rod cover 14 and the head cover 15 are secured from the cylinder case 12 by C-rings 16 and 17, respectively. Therefore, the cylinder hole 13 in the cylinder case 12 is a cylinder chamber that is airtightly held by the rod cover 14 and the head cover 15.

  A piston 19 is accommodated in the cylinder chamber so as to be slidable in the vertical direction of the cylinder case 12. A piston packing 20 is attached to the peripheral surface of the piston 19. Therefore, the cylinder chamber is partitioned by the piston 19 into a rod side cylinder chamber 21 on the rod cover 14 side and a head side cylinder chamber 22 on the head cover 15 side. A magnet M is mounted on the peripheral surface of the piston 19 and above the piston packing 20. For this reason, the magnet M is configured to move in the vertical direction of the cylinder case 12 together with the piston 19.

  A cylindrical piston rod 23 as a rod is integrally provided on the upper end surface of the piston 19, and the piston rod 23 extends in the vertical direction with respect to the cylinder case 12. One side (upper side) of the piston rod 23 protrudes from the upper end surface 12 a of the cylinder case 12 to the outside of the cylinder case 12. An end plate 25 fixed to equipment (not shown) is screwed to the projecting end (upper end) of the piston rod 23 from the cylinder case 12 with a bolt 26. The end plate 25 is formed in a rectangular plate shape. The piston rod 23 is fixed to the center portion of the end plate 25.

  In the cylinder case 12, guide rod insertion holes 27 (in the right side in FIG. 2) that extend along the vertical direction of the cylinder case 12 on both sides of the cylinder chamber (cylinder hole 13) along the long side direction of the upper end surface 12 a. Only the guide rod insertion hole 27 is shown). The guide rods 28 are accommodated in the guide rod insertion holes 27 so as to be slidable in the vertical direction of the cylinder case 12, that is, in the sliding direction of the piston 19. A bearing 29 for reducing the sliding resistance of the guide rod 28 is provided on the peripheral surface of the guide rod insertion hole 27.

  One side (upper side) of both guide rods 28 protrudes from the upper end surface 12 a of the cylinder case 12 to the outside of the cylinder case 12 in the same manner as the piston rod 23. The cylinder case 12 is provided with three rods (one piston rod 23 and two guide rods 28). The protruding ends (upper ends) of both guide rods 28 are screwed to both sides of the end plate 25 by bolts 26.

  When the piston rod 23 protrudes and retracts from the upper end surface 12 a of the cylinder case 12, both guide rods 28 also protrude and retract from the upper end surface 12 a, and both guide rods 28 guide the protrusion and disengagement of the piston rod 23. The pair of guide rods 28 are fixed to both end portions of the end plate 25 to prevent the piston rod 23 from rotating.

  It is a surface that is orthogonal to the upper end surface 12a of the cylinder case 12 and extends parallel to the axial direction of the piston rod 23 and the guide rod 28, and faces the operator when performing maintenance of the pneumatic cylinder 11. The surface to be used is a front surface 12 b of the cylinder case 12. As shown in FIG. 1, a pair of switch grooves 30 including T grooves as grooves formed in the cylinder case 12 are formed on the front surface 12 b. The switch groove 30 is formed along the vertical direction of the cylinder case 12, that is, along the sliding direction of the piston 19.

  At the opening edge of the switch groove 30 on the front surface 12b side of the cylinder case 12, opposite locking portions 30a are formed, and the switching groove 30 is formed in a planar T shape by the locking portions 30a. A position detection switch S for detecting the position of the piston 19 is mounted in the switch groove 30. The position detection switch S detects the position of the piston 19 in the cylinder case 12 by detecting the magnet M that moves together with the piston 19.

  A first supply / discharge port 32 and a second supply / discharge port 33 are formed on the left surface 12 c of the cylinder case 12. As shown in FIG. 2, the first supply / discharge port 32 communicates with the head side cylinder chamber 22. The second supply / discharge port 33 communicates with the rod side cylinder chamber 21. Accordingly, air as a fluid is supplied from the first supply / discharge port 32 to the head-side cylinder chamber 22 and air from the rod-side cylinder chamber 21 is discharged from the second supply / discharge port 33.

  Then, the piston 19 slides to the rod side cylinder chamber 21 side by the air pressure as the fluid pressure, and the piston rod 23 protrudes from the cylinder case 12 (see FIG. 1). On the other hand, air as fluid in the head side cylinder chamber 22 is discharged from the first supply / discharge port 32 and air is supplied from the second supply / discharge port 33 to the rod side cylinder chamber 21. Then, the piston 19 slides into the head side cylinder chamber 22 by the air pressure as the fluid pressure, and the piston rod 23 is immersed in the cylinder case 12. That is, the pneumatic cylinder 11 includes a piston rod 23 that protrudes and protrudes from the upper end surface 12a of the cylinder case 12 by supplying and discharging air. Further, an attachment groove 34 is formed on the right side of the front surface 12 b of the cylinder case 12.

  As shown in FIG. 2, the upper end surface 12 a of the cylinder case 12 is provided with a first recess 40 that surrounds the piston rod 23 at a position where the piston rod 23 is disposed. The first recess 40 is provided on the rod cover 14 side of the circular cylinder hole 13. In addition, the upper end surface 12a of the cylinder case 12 is provided with a circular hole-shaped second recess 41 that surrounds the guide rod 28 at a position where the both guide rods 28 are disposed (the second right-hand side in FIG. 2). Only the recess 41 is shown).

  In the first recess 40, a housing recess 40 a surrounding the piston rod 23 is formed on the inner peripheral surface of the rod cover 14. And in the 1st recessed part 40, the annular element 42 as a sliding contact member is attached to the said accommodation recessed part 40a so that attachment or detachment is possible. An annular element 42 as a sliding contact member is detachably attached to the second recess 41 in the second recess 41. The element 42 is made of a porous body obtained by baking and hardening a resin material made of polyvinyl alcohol, and has a large number of pores. Therefore, the element 42 can entangle foreign matters such as dust and dust by the pore portion, and can hold grease and the like.

  Further, the inner diameter of the element 42 accommodated in the accommodating recess 40 a in the first recess 40 is formed to be smaller than the diameter of the piston rod 23. The upper end surface of the element 42 accommodated in the first recess 40 is flush with the upper surface of the C ring 16. On the other hand, the inner diameter of the element 42 accommodated in the second recess 41 is formed smaller than the diameter of the guide rod 28. The element 42 accommodated in the second recess 41 is set to have the same thickness as the depth of the second recess 41. For this reason, the upper surface of the element 42 accommodated in the second recess 41 is flush with the upper end surface 12a.

  And the element 42 accommodated in the 1st and 2nd recessed parts 40 and 41 is slidably contacted to the perimeter of both the rods 23 and 28 with the protrusion and withdrawal of the piston rod 23 and the guide rod 28, and adheres to a surrounding surface. Scraped off foreign matter. The element 42 prevents foreign matter from entering the cylinder hole 13 and the guide rod insertion hole 27 from between the inner peripheral surface thereof and the peripheral surfaces of the rods 23 and 28. In addition, grease is held in the element 42, and grease is supplied to the peripheral surfaces of the rods 23 and 28 each time the rods 23 and 28 are in sliding contact with the inner peripheral surface of the element 42. Yes.

  Next, the plate 43 will be described. The plate 43 is made of a rectangular plate material. The thickness of the plate 43 is set so as to be thinner than the gap formed between the lower surface of the end plate 25 and the upper end surface 12 a of the cylinder case 12 when the lower end surface of the piston 19 contacts the head cover 15. ing.

  A rod insertion hole 45 through which the piston rod 23 and the guide rod 28 are inserted is formed at the center in the long side direction and both sides in the long side direction of the plate 43 (in FIG. 2, the rod insertion holes 45 at the center and right side of the plate 43 are formed. Is shown). A scraper 46 is provided on the upper surface 43 a side of the plate 43 at the rod insertion hole 45. The scraper 46 includes a lip seal 47 mounted in the rod insertion hole 45. The scraper 46 includes a ring case 48 press-fitted into the rod insertion hole 45 in order to position the lip seal 47 in the rod insertion hole 45. The lip seal 47 of the scraper 46 scrapes off foreign matter adhering to the peripheral surface when the lip portion is in sliding contact with the peripheral surface of the piston rod 23 or the guide rod 28.

  As shown in FIG. 1, a pair of mounting grooves 52 formed of T-grooves as grooves formed in the plate 43 are formed in the center in the long side direction on the front surface of the plate 43. It is formed to extend in the thickness direction (vertical direction) of the plate 43. The planar shape of the mounting groove 52 is the same as the planar shape of the switch groove 30. Further, locking portions 52 a that are opposed to each other are formed at the opening edge of the mounting groove 52 on the front side of the plate 43. When the plate 43 is mounted on the upper end surface 12a of the cylinder case 12, the mounting groove 52 matches the switch groove 30, and the locking portion 52a also matches the locking portion 30a.

  The plate 43 is movable along the axial direction of the piston rod 23 and the guide rod 28, and the plate 43 is placed on the first and second recesses 40, 41 so as to cover the first and second recesses 40. , 41 can be attached to hold the element 42. In addition, the plate 43 can be in a non-mounted state with respect to the upper end surface 12a by moving the plate 43 along the axial direction of the piston rod 23 and the guide rod 28 and away from the upper end surface 12a. .

  The pneumatic cylinder 11 includes mounting means for mounting the plate 43 with respect to the upper end surface 12a. The mounting means includes a switch groove 30 of the cylinder case 12, a mounting groove 52 of the plate 43, a plate nut 53 that can be inserted into the switch groove 30 and the mounting groove 52, and a mounting screw 54 that can be screwed into the plate nut 53. And the mounting groove 52 and the locking portions 30 a and 52 a of the switch groove 30. And the plate 43 can take the mounting state with respect to the said upper end surface 12a, and a non-mounting state by operation of the said mounting means.

  The plate nut 53 constituting the mounting means has a metal rectangular shape, and a pair of mounting holes 53a are formed therethrough. In order to place the plate 43 on the upper end surface 12 a by the mounting means, the plate nut 53 is inserted and disposed in the mounting groove 52 of the plate 43 and the switch groove 30 that matches the mounting groove 52. At this time, the mounting hole 53a faces the front surface 12b side of the cylinder case 12, and the mounting hole 53a passes through the plate nut 53 in a direction perpendicular to the front surface 12b of the cylinder case 12. That is, the mounting hole 53a extends in a direction (front-rear direction) orthogonal to the axial direction (up-down direction) of the piston rod 23 and the guide rod 28.

  Then, with one end surface (upper end surface) of the plate nut 53 being flush with the upper surface of the plate 43, the mounting screw 54 is screwed into the upper mounting hole 53a using a tool, and the mounting screw 54 is inserted into the mounting groove. 52 Press against the inner surface. Similarly, the mounting screw 54 is screwed into the lower mounting hole 53a using a tool, and the mounting screw 54 is pressed against the inner surface of the switch groove 30. At this time, the penetration direction of the plate nut 53 of the mounting hole 53a extends in a direction (front-rear direction) orthogonal to the axial direction (up-down direction) of the piston rod 23 and the guide rod 28. For this reason, the screwing direction of the mounting screw 54 with respect to the mounting hole 53a is orthogonal to the axial direction of the piston rod 23 and the guide rod 28 (front-rear direction). Therefore, the piston rod 23 and the guide rod 28 do not hinder the screwing operation of the mounting screw 54 using a tool.

  Then, the plate nut 53 is pulled toward the locking portions 30a and 52a as the mounting screw 54 is screwed into the mounting hole 53a. When the mounting screw 54 is screwed to the plate nut 53, the plate nut 53 is locked to the locking portions 30a and 52a. Then, the plate 43 and the cylinder case 12 are connected by the plate nut 53, the locking portion 30 a of the switch groove 30, the locking portion 52 a of the mounting groove 52 and the mounting screw 54, and the plate 43 is attached to the upper end surface 12 a of the cylinder case 12. Is done. Therefore, the operation of screwing the mounting screw 54 into the plate nut 53 using a tool is an operation of the mounting means, and the plate 43 can be mounted on the upper end surface 12a by this operation.

  As shown in FIG. 2, an annular ring adapter is formed between the rod insertion hole 45 through which the piston rod 23 is inserted and the first recess 40 in a state where the plate 43 is mounted on the upper end surface 12 a. 49 is interposed. The ring adapter 49 is disposed on the element 42 and the C ring 16 in the first recess 40. When the plate 43 is mounted on the upper end surface 12 a, the ring adapter 49 presses the element 42 against the rod cover 14 and holds the element 42 in the first recess 40.

  Further, in the state where the plate 43 is mounted on the upper end surface 12a, an annular washer 50 is interposed between the rod insertion hole 45 through which the guide rod 28 is inserted and the second recess 41. . The washer 50 is disposed on the element 42 in the second recess 41. When the plate 43 is mounted on the upper end surface 12 a, the washer 50 presses the element 42 against the bearing 29 and holds the element 42 in the second recess 41.

  Further, in a state where the plate 43 is mounted on the upper end surface 12a, the plate 43 and the upper end surface 12a of the cylinder case 12 are specifically, specifically, between the ring adapter 49 and the lip seal 47, and the washer 50 and the lip. A gap 51 is interposed between each of the seals 47. The gap 51 is configured such that foreign matter scraped off by the lip seal 47 slidingly contacting the peripheral surfaces of the piston rod 23 and the guide rod 28 enters.

  In the pneumatic cylinder 11, in order to put the plate 43 in the mounted state into the non-mounted state by operating the mounting means, the mounting screw 54 screwed into the mounting hole 53 a of the plate nut 53 is removed from the mounting hole 53 a using a tool. Repel. That is, in order to change the plate 43 from the mounting state to the non-mounting state, the mounting screw 54 as mounting means is operated (screwed). At this time, the plate nut 53 is attached to the front surface 12 b of the cylinder case 12 and the front surface of the plate 43. For this reason, the screwing operation of the mounting screw 54 is performed on the front surface 12 b side of the cylinder case 12 in the pneumatic cylinder 11.

  The direction in which the mounting hole 53a passes through the plate nut 53 is orthogonal to the front surface 12b of the cylinder case 12 (inner surface of the switch groove 30) and orthogonal to the axial direction (vertical direction) of the piston rod 23 and the guide rod 28. Direction (front-rear direction). For this reason, in order to change the plate 43 from the mounted state to the non-mounted state, the direction (operation direction) in which the mounting screw 54 is screwed from the plate nut 53 using a tool is the axial direction of the piston rod 23 and the guide rod 28. Go straight. As a result, the piston rod 23 and the guide rod 28 do not exist along the screwing direction of the mounting screw 54, and further, the end plate 25 does not exist on the extension line in the screwing direction. Therefore, the operation of screwing the mounting screw 54 from the plate nut 53 using a tool is performed without the end plate 25 becoming an obstacle.

  When the mounting screws 54 are screwed out of the lower mounting holes 53a of the plate nuts 53, the mounting state of the cylinder case 12 and the plate 43 by the plate nuts 53 and the mounting screws 54 is released. Therefore, the operation of screwing the mounting screw 54 from the plate nut 53 using a tool is an operation of the mounting means, and the plate 43 can be in a non-mounted state with respect to the upper end surface 12a by this operation.

  In order to remove the foreign matter in the gap 51, as shown in FIGS. 3 and 4, the plate 43 is moved upward along the axial direction of the rods 23 and 28, and the lower surface 43b of the plate 43 and the cylinder The upper end surface 12a of the case 12 is separated from the upper end surface 12a so that the plate 43 is not attached to the upper end surface 12a. Then, the lip seal 47 in each rod insertion hole 45, the ring adapter 49, and the washer 50 are separated from each other, the clearance 51 is opened, and foreign matter in the clearance 51 can be removed.

According to the above embodiment, the following effects can be obtained.
(1) The plate 43 is mounted on the upper end surface 12a of the cylinder case 12 by mounting means. The operating direction of the mounting means (the screwing direction of the mounting screw 54) when the plate 43 is changed from the mounting state to the non-mounting state is the direction orthogonal to the axial direction of the piston rod 23 and the guide rod 28. For this reason, the piston rod 23, the guide rod 28, and the end plate 25 are not arranged along the screwing direction of the mounting screw 54. Therefore, the piston rod 23, the guide rod 28, and the end plate 25 do not hinder the screwing operation of the mounting screw 54, and the plate 43 is moved from the mounted state to the non-mounted state with respect to the upper end surface 12a. The operation of separating the plate 43 from the upper end surface 12a can be easily performed. As a result, foreign matter removal in the gap 51, maintenance of the element 42 in the first and second recesses 40 and 41, grease replenishment work, maintenance of the scraper 46, etc. can be easily performed. Maintainability can be improved.

  (2) Further, the operating direction of the mounting means (the screwing direction of the mounting screw 54 from the plate nut 53) for changing the plate 43 from the mounting state to the non-mounting state is orthogonal to the axial direction of the piston rod 23 and the guide rod 28. The direction. Therefore, the operation of screwing the mounting screw 54 from the plate nut 53 can be easily performed, and the mounting state of the plate 43 to the cylinder case 12 can be easily released. Therefore, for example, when the end plate 25 exists, the plate 43 cannot be removed from the cylinder case 12, and the end plate 25 and the equipment are required to be disassembled for maintenance inside the pneumatic cylinder 11. In comparison, maintenance inside the pneumatic cylinder 11 can be facilitated.

  (3) The plate nut 53 is inserted into the switch groove 30 formed in advance in the cylinder case 12 in order to mount the position detection switch S on the cylinder case 12, and the plate 43 is used to mount the upper end surface 12a using the plate nut 53. It is made into a mounting state. For this reason, it is not necessary to provide a new structure in the cylinder case 12 in order to put the plate 43 on the upper end surface 12a, and it is possible to prevent the structure of the pneumatic cylinder 11 from becoming complicated and suppress an increase in manufacturing cost. .

  (4) In the plate 43, the plate nut 53 is inserted into the switch groove 30 of the cylinder case 12 and the mounting groove 52 of the plate 43, the mounting screw 54 is screwed into the mounting hole 53a of the plate nut 53, and the plate nut 53 is The cylinder case 12 is mounted by being locked to the locking portions 30a and 52a. Here, the plate nut 53 is formed by screwing a mounting hole 53a into a rectangular parallelepiped metal body, and the plate nut 53 has a simple configuration. Therefore, the plate 43 can be attached to the cylinder case 12 by using a simple configuration member such as the plate nut 53 and using a simple configuration such as the switch groove 30 provided in the cylinder case 12 in advance. As a result, the configuration of the pneumatic cylinder 11 with good maintainability can be simplified.

  (5) The scraper 46 is integrated with the plate 43, and the scraper 46 scrapes off the foreign matter adhering to the circumferential surfaces of the piston rod 23 and the guide rod 28. Therefore, the pneumatic cylinder 11 is provided with two foreign material scraping means including a scraper 46 and an element 42 along the axial direction of the rods 23 and 28. As a result, it is possible to suppress the occurrence of a problem that foreign matter enters the rod side cylinder chamber 21 and to prevent the occurrence of a problem such as damage to the piston packing 20.

(6) Since the element 42 is a porous body and can enclose grease, sliding between the peripheral surface of each of the rods 23 and 28 and the inner peripheral surface of the element 42 can be made smooth.
(Second Embodiment)
Next, a second embodiment in which the actuator with rod of the present invention is embodied in a pneumatic cylinder 11 will be described with reference to FIG. In addition, since 2nd Embodiment is the structure which changed the plate and mounting | wearing means of 1st Embodiment, the overlapping description is abbreviate | omitted about the same part.

  As shown in FIG. 5, the length of the plate 60 of the second embodiment in the short side direction is shorter than the length of the upper end surface 12 a of the cylinder case 12 in the short side direction. An L-shaped metal fitting 61 is attached to the front side of the plate 60 with bolts 62. In a state where the L-shaped fitting 61 is attached to the plate 60, the lower side of the L-shaped fitting 61 protrudes from the lower surface of the plate 60. In a state where the plate 60 is mounted on the upper end surface 12 a of the cylinder case 12, both the front and rear surfaces of the plate 60 are located inside the front surface 12 b and the rear surface of the cylinder case 12.

  On the upper end surface 12 a of the cylinder case 12, U-shaped grooves 12 d as grooves of the cylinder case 12 are formed on both sides of the switch groove 30. The U-shaped groove 12d is formed by cutting out the upper end surface 12a and the front surface 12b of the cylinder case 12. A thread 12f is threaded on the front surface 12b of the cylinder case 12 in the U-shaped groove 12d.

  In the pneumatic cylinder 11 of the second embodiment, the lower side of the L-shaped metal fitting 61 attached to the plate 60 is inserted into the U-shaped groove 12d in order to place the plate 60 on the upper end surface 12a. To do. Furthermore, the L-shaped metal fitting 61 is fixed to the cylinder case 12 by screwing a bolt 63 penetrating the lower side of the L-shaped metal fitting 61 into the thread 12f in the U-shaped groove 12d, and the plate 60 is fixed to the upper end surface 12a. It is made into a mounting state.

  In the second embodiment, the L-shaped metal fitting 61, the U-shaped groove 12d, the thread 12f in the U-shaped groove 12d, and the bolt 63 are mounting means for mounting the plate 60 on the upper end surface 12a. It is composed. In the pneumatic cylinder 11 of the second embodiment, the mounting state of the plate 60 with respect to the cylinder case 12 can be released and the mounting state can be made non-mounted by retreating the bolt 63 from the thread 12f. The operating direction of the mounting means when the plate 60 is changed from the mounting state to the non-mounting state, that is, the screwing direction of the bolt 63 is orthogonal to the axial directions of the piston rod 23 and the guide rod 28.

In addition, you may change the said embodiment as follows.
In the first embodiment, the mounting screw 54 screwed into the lower mounting hole 53a of the plate nut 53 is screwed, but the mounting screw 54 screwed into the upper mounting hole 53a of the plate nut 53 is removed. The plate 43 may be unscrewed so that the plate 43 is not attached to the upper end surface 12a. Alternatively, all the mounting screws 54 screwed into the plate nut 53 may be screwed back so that the plate 43 is not attached to the upper end surface 12a.

  In the first embodiment, a protrusion may be integrally formed on the front lower surface 43b of the plate 43, and an attachment hole into which the attachment screw 54 can be screwed may be formed in the protrusion. The projection 43 may be inserted into the switch groove 30 of the cylinder case 12 and the mounting screw 54 may be screwed into the mounting hole to mount the plate 43 to the cylinder case 12. At this time, the protrusion, the switch groove 30, the locking portion 30a, and the mounting screw 54 constitute mounting means for mounting the plate 43 to the upper end surface 12a. Conversely, a protrusion may be formed integrally with the upper end surface 12a of the cylinder case 12, and an attachment hole into which the attachment screw 54 can be screwed may be formed in the protrusion. And it is good also as a structure which inserts a protrusion in the attachment groove | channel 52 of the plate 43, screws the attachment screw 54 in an attachment hole, and mounts the plate 43 to the upper end surface 12a. At this time, the protrusion, the mounting groove 52, the locking portion 52a, and the mounting screw 54 constitute mounting means for mounting the plate 43 to the upper end surface 12a.

  In the second embodiment, a protrusion that extends to the lower surface side is integrally formed so as to be in the same state as the state where the L-shaped metal fitting 61 is attached to the front side of the plate 60, and the protrusion 63 is formed so that the bolt 63 can pass therethrough. To do. Then, a protrusion formed integrally with the plate 60 is inserted into the U-shaped groove 12d of the cylinder case 12, and the bolt 63 penetrating the protrusion is screwed into the thread 12f in the U-shaped groove 12d to attach the plate 60. It is good also as a structure with which the cylinder case 12 is mounted | worn. At this time, the protrusion, the U-shaped groove 12d, the screw thread 12f, and the bolt 63 constitute mounting means for mounting the plate 60 to the upper end surface 12a.

  In the first embodiment, the switch groove 30 may be formed on any one of the left surface 12c, the rear surface, and the right surface of the cylinder case 12, and the mounting groove 52 may be formed on any one of the left surface, the rear surface, and the right surface of the plate 43. Good. The plate nut 53 may be inserted into the matching switch groove 30 and the mounting groove 52, and the mounting screw 54 may be screwed into the mounting hole 53 a of the plate nut 53 to mount the plate 43 to the cylinder case 12.

In each embodiment, the plate 43, 60 may be mounted on the upper end surface 12a using the attachment groove 34.
In each embodiment, the sliding contact member may be formed of felt.

  In each embodiment, the pneumatic cylinder 11 may be a type in which only one piston rod 23 is provided in the cylinder case 12 and no guide rod 28 is provided. At this time, the cylinder case 12 may be formed in a cylindrical shape. Further, the cylinder case 12 may be of a type provided with only a plurality of (for example, two) piston rods 23 (the guide rod 28 is not provided). Alternatively, the pneumatic cylinder 11 may be a type in which the cylinder case 12 includes one piston rod 23 and one guide rod 28.

The actuator with rod may be embodied as a hydraulic cylinder in which the piston rod 23 appears and disappears by hydraulic pressure as fluid pressure.
The actuator with rod may be embodied as an electric actuator using a motor as a drive source, for example.

The perspective view which shows the pneumatic cylinder of 1st Embodiment. The longitudinal cross-sectional view which shows the pneumatic cylinder of 1st Embodiment. The perspective view which shows the state which made the plate the mounting | wearing state with respect to an upper end surface. The fragmentary longitudinal cross-section which shows the state which set the plate to the non-wearing state with respect to the upper end surface. The perspective view which shows the pneumatic cylinder of 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS S ... Position detection switch, 11 ... Pneumatic cylinder as an actuator with a rod, 12 ... Cylinder case as an actuator main body, 12a ... Upper end surface as an end surface, 12d ... U-shaped groove as a groove which comprises a mounting means, 12f ... Installation Threads constituting means, 19 ... piston, 23 ... piston rod as rod, 25 ... end plate, 28 ... guide rod as rod, 30 ... switch groove as groove constituting mounting means, 30a, 52a ... mounting Locking portion constituting means, 40... First recess as recess, 41... Second recess as recess, 42... Element as sliding contact member, 43, 60... Plate, 46. Mounting groove as a constituting groove, 53... Plate nut constituting the mounting means, 54... Mounting screw constituting the mounting means, 6 ... L-shaped bracket which constitutes the attachment means, 63 ... bolt constituting the mounting means.

Claims (5)

An actuator with a rod comprising a rod protruding from an end face of the actuator body, and an end plate at the protruding end of the rod from the actuator body;
A concave portion surrounding the periphery of the rod is provided at the position where the rod is disposed on the end surface, and a sliding contact member that is detachably attached to the concave portion and slidably contacts the peripheral surface of the rod;
The rod is inserted and movable along the axial direction of the rod, and is attached to the end surface to hold the sliding contact member in the recess, and to a non-mounted state spaced from the end surface. A possible plate,
A mounting means for mounting the plate on the end surface;
The plate, by the operation of said mounting means being adapted to be taken and the non-wearing state and the mounted state, the direction in which the operation the attachment means to said mounting state and the non-mounted state, the rod An actuator with a rod, characterized in that the direction is orthogonal to the axial direction. The mounting means includes a groove formed in the plate, a groove formed in the actuator body, a plate nut inserted into the both grooves, a mounting screw that can be screwed into the plate nut, and the both grooves. And is formed from a locking portion formed on
The plate is brought into the mounted state by a mounting screw being screwed onto the plate nut and the plate nut being locked to a locking portion, while the mounting screw is screwed out of the plate nut and the non- It is assumed to be attached
The actuator with a rod according to claim 1, wherein a screwing direction of the mounting screw is set in a direction orthogonal to an axial direction of the rod. The actuator body is a cylinder case, and the rod is a piston rod that moves based on a fluid pressure acting on a piston housed in the cylinder case, and the groove of the actuator body is a piston attached to the rod. The actuator with a rod according to claim 2, which is a switch groove for mounting a position detection switch for detecting the position of the cylinder in the cylinder case. The mounting means includes an L-shaped bracket attached to the plate, a groove into which the L-shaped bracket is inserted in the actuator body, a screw thread threaded into the groove, and an L-shaped bracket. And a bolt that can be screwed into the thread.
The plate is brought into the mounted state by passing a bolt through the L-shaped metal fitting and screwed into the screw thread, while the plate is brought into the non-mounted state by screwing the bolt from the screw thread. ,
The actuator with a rod according to claim 1, wherein a screwing direction of the bolt is set in a direction orthogonal to an axial direction of the rod. The rod-attached actuator according to any one of claims 1 to 4, wherein the plate is provided with a scraper that scrapes off foreign matters attached to the peripheral surface of the rod.

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