JP6292849B2 - Cylinder device manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing a cylinder device.

  In a cylinder device, the mounting bracket body is fitted to the piston rod by fitting the mounting bracket body to the end of the piston rod and fitting the half member into the groove of the piston rod and connecting them with bolts. (For example, refer to Patent Document 1).

Japanese Utility Model Publication No.59-22361

  In the cylinder device, improvement in productivity is required.

Therefore, an object of this invention is to provide the manufacturing method of the cylinder apparatus which can improve productivity.

To achieve the above object, the present invention, the annular recess formed on the outer peripheral portion of the mounting portion of the end portion, the outer peripheral portion of the mounting portion, so as to communicate with the recess before Symbol recess facing position the communication hole arranged a fitted bracket having a tubular portion which is made shape, the coupling member is inserted from the communication hole toward the recess, the inner peripheral surface of the cylindrical portion of the bracket and The mounting portion and the bracket are joined by plastic deformation following the shape of the recess .

  According to the present invention, productivity can be improved.

It is the front view which made the bracket the cross section which shows the cylinder apparatus of 1st Embodiment which concerns on this invention. It is an exploded front sectional view of an important section showing a cylinder device of a 1st embodiment concerning the present invention. It is a side view which shows the bracket of the cylinder apparatus of 1st Embodiment which concerns on this invention. The coupling member of the cylinder apparatus of 1st Embodiment which concerns on this invention is shown, (a) is a top view, (b) is a sectional side view. It is a plane sectional view showing the important section of the cylinder device of a 1st embodiment concerning the present invention, (a) shows before the driving of a connecting member, and (b) shows after the driving of a connecting member. It is a front sectional view of an important section showing a cylinder device of a 1st embodiment concerning the present invention. The bracket of the cylinder apparatus of 2nd Embodiment which concerns on this invention is shown, (a) is a top view, (b) is a front sectional view, (c) is a side view. FIG. 7A is a cross-sectional view of the bracket of the cylinder device according to the second embodiment of the present invention, taken along line AA in FIG. 7A, wherein FIG. 7A shows before the coupling member is driven, and FIG. It is. It is a front sectional view of the important section before connecting member attachment which shows the cylinder device of a 3rd embodiment concerning the present invention. The coupling member of the cylinder apparatus of 3rd Embodiment which concerns on this invention is shown, (a) is a top view, (b) is a side view. It is a front sectional view of an important part showing a cylinder device of a 3rd embodiment concerning the present invention. It is an expanded sectional view of the X section of Drawing 11 showing the cylinder device of a 3rd embodiment concerning the present invention. It is a front sectional view of an important section showing a cylinder device of a 4th embodiment concerning the present invention. It is an expanded sectional view of the Y section of Drawing 13 showing the cylinder device of a 4th embodiment concerning the present invention.

“First Embodiment”
1st Embodiment which concerns on this invention is described based on FIGS.

  The cylinder device 10 of the first embodiment includes a cylinder 11 and a rod 12 having one end inserted into the cylinder 11 and the other end extending from the cylinder 11 to the outside. The cylinder 11 has a bottomed cylindrical cylinder body 15 that is closed at one end and opened at the other end, and a rod guide that is fitted in the opening 16 of the cylinder body 15 and closes the gap between the opening 16 and the rod 12. 17 and an attachment member 19 that is fixed to the bottom 18 of the cylinder body 15 and protrudes from the cylinder body 15 in the direction opposite to the rod 12.

  A piston 21 is fixed to the end of the rod 12 on the side disposed inside the cylinder 11. The rod 12 is supported by the rod guide 17 so as to be slidable along the axial direction, and the piston 21 is supported by the cylinder body 15 so as to be slidable along the axial direction. Thereby, the rod 12 and the piston 21 move relative to the cylinder 11 along the axial direction. The cylinder body 15 is formed with a reduced diameter portion 22 at an intermediate position on the opening 16 side in the axial direction. The piston 21 is fitted between the reduced diameter portion 22 and the bottom portion 18, and therefore, the movement toward the opening 16 side of the reduced diameter portion 22 is restricted by the reduced diameter portion 22.

  The inside of the cylinder 11 is divided into two chambers 23 and 24 by a piston 21. A pressurized gas such as compressed air or compressed nitrogen gas and a small amount of oil are enclosed in the cylinder 11. Due to the pressure of the gas and the pressure receiving area difference of the piston 21, a biasing force is generated in the piston 21 in a direction in which the rod 12 protrudes from the cylinder 11. That is, the cylinder device 10 is a gas spring that generates an urging force on the extending side. In the natural state where no external force is applied to the cylinder device 10, the piston 21 is in contact with the reduced diameter portion 22 and stopped. In this state, the rod 12 protrudes most from the cylinder 11.

  The piston 21 is provided with a damping force generation mechanism (not shown). This damping force generating mechanism causes gas and oil to flow from the chamber 23 to the chamber 24 by the movement of the piston 21 when the rod 12 moves to the extension side that increases the amount of protrusion from the cylinder 11. The flow resistance is increased, and the damping force is increased. Thereby, the relative moving speed of the rod 12 with respect to the cylinder 11 is reduced. On the other hand, when the rod 12 moves to the contraction side that reduces the amount of protrusion from the cylinder 11, the damping force generation mechanism causes gas and oil to flow from the chamber 24 to the chamber 23 due to the movement of the piston 21. Therefore, the flow resistance is reduced and the damping force is lowered.

  A mounting portion 31 having a common shape is formed at the end portion of the rod 12 opposite to the cylinder 11 and the end portion of the mounting member 19 opposite to the rod 12 of the cylinder 11. A bracket 32 that is a common part is attached to a mounting part 31 of the rod 12 and a mounting part 31 of the cylinder 11 by a coupling member 33 that is a common part.

  The cylinder device 10 is attached between the window frame of the smoke exhaust window and the window main body, for example. The smoke exhaust window has a structure in which a window main body is rotatably supported by a lower part of a window frame via a hinge. When the smoke exhaust window is attached to such a smoke exhaust window, the cylinder device 10 is attached to a rod 12, for example. The bracket 32 is connected to the window body, and the bracket 32 attached to the cylinder 11 is connected to the window frame.

  In a state where the window main body closes the window opening, the cylinder device 10 minimizes the protruding amount of the rod 12 from the cylinder main body 15, and the piston 21 is located closest to the bottom 18 side of the cylinder main body 15. At this time, the urging force in the direction in which the rod 12 protrudes from the cylinder body 15 is generated in the cylinder device 10 as described above. Therefore, when the lock of the window body on the window frame is released, the cylinder device 10 extends to increase the protruding amount of the rod 12 from the cylinder 11, presses the window body, and opens the window body. It will be. At this time, a damping force generation mechanism (not shown) increases the damping force, so that the opening speed of the window body is reduced and the impact during the opening operation is reduced.

  On the other hand, when the window main body is opened by, for example, manually pressing the window main body and closing the window main body, the cylinder device 10 is contracted so as to reduce the protruding amount of the rod 12 from the cylinder 11. become. At this time, a damping force generation mechanism (not shown) lowers the damping force, lowers the resistance when closing the window body, and improves operability.

  The mounting portion 31 at the end of the rod 12 and the mounting portion 31 at the end of the cylinder 11 have a common shape as described above, and both have the shaft portion 41. In the rod 12, the shaft portion 41 has a smaller diameter than the main shaft portion 42 on the inner side in the axial direction, that is, on the cylinder 11 side. Therefore, the mounting portion 31 of the rod 12 is formed with a step portion 44 having a step surface 43 orthogonal to the axial direction between the shaft portion 41 and the main shaft portion 42. In the rod 12, an annular recess 51 that is recessed inward in the radial direction is formed on the outer peripheral portion of the shaft portion 41 at an intermediate position in the axial direction. Therefore, an annular recess 51 is formed in the outer peripheral portion of the mounting portion 31 of the rod 12, and the inner side in the axial direction is larger in diameter in the axial direction than the concave portion 51 in the outer peripheral portion of the mounting portion 31. A step 44 is provided.

  Further, in the cylinder 11, the shaft portion 41 has a smaller diameter than the flange portion 45 on the inner side in the axial direction, that is, on the rod 12 side. Therefore, the mounting portion 31 of the cylinder 11 is formed with a step portion 44 having a step surface 43 orthogonal to the axial direction between the shaft portion 41 and the flange portion 45. Also in the cylinder 11, an annular recess 51 that is recessed inward in the radial direction is formed in the outer peripheral portion of the shaft portion 41 at an intermediate position in the axial direction. Therefore, an annular recess 51 is formed in the outer peripheral portion of the mounting portion 31 of the cylinder 11, and the inner diameter in the axial direction is larger than the outer recess in the outer peripheral portion of the mounting portion 31. A step 44 is provided.

  One bracket 32 is fitted to the outer peripheral portion of the shaft portion 41 of the rod 12 and is connected to the rod 12 by one coupling member 33, and the other bracket 32 is fitted to the outer peripheral portion of the shaft portion 41 of the cylinder 11. Then, the other coupling member 33 is coupled to the cylinder 11. The rod 12 and the attachment member 19 are made of, for example, a steel material, and the bracket 32 is made of a hard material that is not easily deformed by insertion of a coupling member 33 such as a steel material or resin. The coupling member 33 is made of a metal material that is softer than the rod 12, the mounting member 19, and the bracket 32, such as copper or brass.

  When manufacturing the cylinder device 10, the painting process is performed before the brackets 32 and 32 are coupled to the rod 12 and the cylinder 11 by the coupling members 33 and 33. That is, in the painting process, the main shaft portion 42 and the mounting portion 31 of the rod 12 protruding from the cylinder 11 are inserted into the cylindrical masking member to mask the surface of the cylinder device 10 before being attached. Also, the mounting portion 31 of the mounting member 19 is inserted into a cylindrical masking member to mask the surface. Then, in this state, the cylinder device 10 is immersed in the coating liquid tank, and coating is performed except for the portion covered with the masking member. Thereafter, both masking members are removed from the cylinder device 10 taken out from the coating liquid tank, and the brackets 32 and 32 are attached to the mounting portions 31 and 31 by the coupling members 33 and 33. The coating method may be any coating method such as electrostatic coating, in addition to being immersed in a coating tank.

  In the cylinder device 10 of the first embodiment, the mounting portion 31 provided on the rod 12, the bracket 32, and the one mounting structure portion 55 including the coupling member 33, and the mounting portion 31 and the bracket 32 provided on the cylinder 11, respectively. And the other attachment structure part 56 which consists of the coupling member 33 is common except the outer diameter of the step parts 44 and 44. As shown in FIG. For this reason, below, it demonstrates taking the attachment structure part 55 as an example.

  As shown in FIG. 2, the shaft portion 41 of the mounting portion 31 includes a cylindrical outer peripheral surface 61 having a constant diameter extending coaxially with respect to the step surface 43 from the inner peripheral edge of the step surface 43, and the cylindrical outer peripheral surface 61. A wall surface 62 that extends inward in the radial direction perpendicular to the axial direction of the cylindrical outer peripheral surface 61 from the edge on the side opposite to the step surface 43, and is coaxial with the cylindrical outer peripheral surface 61 from the inner peripheral edge of the wall surface 62. Then, a cylindrical bottom surface 63 having a constant diameter extending to the side opposite to the step surface 43, and a radially outer side perpendicular to the axial direction of the cylindrical bottom surface 63 from the edge of the cylindrical bottom surface 63 opposite to the step surface 43. And a wall surface 64 extending in the direction. Further, the shaft portion 41 has a cylindrical outer peripheral surface 65 having a constant diameter that extends coaxially from the outer peripheral edge of the wall surface 64 to the cylindrical outer peripheral surface 61 and extends to the opposite side of the step surface 43, and a cylindrical outer peripheral surface 65. A taper surface 66 extending from the end edge on the side opposite to the step surface 43 so that the diameter decreases as the distance from the step surface 43 decreases, and an axial direction from the end edge of the taper surface 66 on the side opposite to the step surface 43. And an end face 67 extending inward in the radial direction. A recess 51 is formed by the wall surfaces 62 and 64 and the cylindrical bottom surface 63.

  The bracket 32 has a cylindrical body 71 and a bottom 72 that closes one end of the body 71 in the axial direction, and has a bottomed cylindrical tube having an opening 73 on the side opposite to the bottom 72 of the body 71. And a mounting portion 75 provided on the opposite side of the opening portion 73 of the bottom portion 72 of the cylindrical portion 74. The attachment portion 75 has a disk shape, and extends on the center line of the bottom portion 72 from a diameter line position passing through the center of the bottom portion 72 with the thickness direction along the radial direction of the cylindrical portion 74. That is, the bracket 32 has a mounting portion 75 on one end side and a bottomed cylindrical portion 74 on the other end side. The attachment portion 75 is formed with an attachment hole 77 penetrating in the thickness direction. The bracket 32 is rotatably connected to one target object to which the cylinder device 10 is attached by a member inserted into the attachment hole 77.

  An end surface 81 opposite to the bottom 72 of the body portion 71 is orthogonal to the axial direction of the body portion 71, that is, the cylindrical portion 74, and an inner peripheral surface 82 of the body portion 71 is a cylindrical outer peripheral surface 61 of the shaft portion 41. , 65 can be fitted into an inner cylindrical surface. A bottom surface 83 located in the body portion 71 of the bottom portion 72 is orthogonal to the axial direction of the body portion 71. The axial distance between the end surface 81 and the bottom surface 83 of the cylindrical portion 74 is formed slightly longer than the axial distance between the step surface 43 and the end surface 67 of the mounting portion 31, and the mounting portion 31 is connected to the cylindrical portion 74. When fitted, the step surface 43 and the end surface 81 come into contact with each other, and the end surface 67 and the bottom surface 83 are separated from each other.

  In the body portion 71, a communication hole 85 that penetrates and communicates with the inside and outside of the body portion 71 in the radial direction is formed at an intermediate position in the axial direction. The communication hole 85 is on the side close to the end surface 81 and along the end surface 81, on the side far from the end surface 81 and along the end surface 81, and a pair connecting the surfaces 86 and 87 as shown in FIG. 3. Side surfaces 88, 88. One of the pair of side surfaces 88, 88 connects the edge portions on one side of the surfaces 86, 87 in the circumferential direction of the body portion 71, and the other of the pair of side surfaces 88, 88 is The opposite edge portions of the surfaces 86 and 87 in the circumferential direction of the body portion 71 are connected to each other.

  The surfaces 86 and 87 are parallel to the end surface 81 and are thus parallel to each other. The side surfaces 88 and 88 are both parallel to the axial direction of the body portion 71 and parallel to the radial direction of the body portion 71. Therefore, the side surfaces 88 and 88 are parallel to each other. Here, the distance between the side surfaces 88, 88 is set to be equal to the inner diameter of the inner peripheral surface 82 of the body portion 71, and a line passing through the center between the side surfaces 88, 88 and parallel thereto is the inner peripheral surface 82. Perpendicular to the center line of Accordingly, the side surfaces 88 and 88 extend from positions different from the inner peripheral surface 82 by 180 degrees so as to coincide with the tangent line of the inner peripheral surface 82.

  As shown in FIG. 2, the distance from the step surface 43 of the mounting portion 31 to the wall surface 62 of the recess 51 and the distance from the end surface 81 of the bracket 32 to the surface 86 of the communication hole 85 are set to be equal. The distance between the wall surfaces 62 and 64 and the distance between the surfaces 86 and 87 of the communication hole 85 are set to be equal. Therefore, the distance from the step surface 43 to the wall surface 64 of the recessed part 51 and the distance from the end surface 81 to the surface 87 of the communication hole 85 are set equally. Due to these dimensional relationships, when the bracket 32 is fitted to the outer peripheral portion of the shaft portion 41 of the mounting portion 31, the communication hole 85 is disposed at a position facing the recess 51 and communicates with the recess 51. In other words, the bracket 32 is formed with a communication hole 85 that communicates with the recess 51 at a position facing the recess 51.

  The coupling member 33 is plastically deformed and couples the bracket 32 to the mounting portion 31. The connecting member 33 before plastic deformation will be described. As shown in FIG. 4, the coupling member 33 has a plate shape, and a pair of main plate portions 101 and a pair of both ends of the main plate portion 101 extending in the same direction with respect to the main plate portion 101 in parallel with each other. It has the extension part 102,102. That is, the coupling member 33 has a bifurcated shape, in other words, a U shape. In the coupling member 33, the surfaces 103 on both sides in the thickness direction are flat and parallel to each other, and thus have a constant plate thickness. The thickness direction of the coupling member 33 is referred to as a plate thickness direction, and the direction connecting the pair of extending portions 102 and 102 is referred to as a plate width direction.

  The main plate portion 101 has a cylindrical inner cylindrical surface 105 on the extending side of the extending portions 102 and 102, and an outer cylindrical surface on the opposite side to the extending side of the extending portions 102 and 102. A cylindrical surface 106 is provided. The main plate portion 101 has a pair of flat outer surfaces 107 and 107 on both sides in the plate width direction. The inner cylindrical surface 105 and the outer cylindrical surface 106 are formed substantially coaxially, and the outer cylindrical surface 106 has a cylindrical surface shape with a larger diameter than the inner cylindrical surface 105. The outer side surfaces 107 and 107 are parallel to each other and are orthogonal to the plate width direction. The inner cylindrical surface 105, the outer cylindrical surface 106, and the outer surfaces 107 and 107 are along the thickness direction.

  Each of the extending portions 102 and 102 is continuous in the same plane as a flat inner surface 111 extending on the tangent line from the end of the inner cylindrical surface 105 of the main plate portion 101 and a corresponding one of the outer surfaces 107 and 107. A flat outer surface 112 and a flat end surface 113 connecting the inner surface 111 and the opposite side of the outer surface 112 to the main plate portion 101. The inner surfaces 111 and 111 and the outer surfaces 112 and 112 are all parallel, and the end surfaces 113 and 113 are orthogonal to them. The inner surfaces 111 and 111, the outer surfaces 112 and 112, and the end surfaces 113 and 113 are along the thickness direction. As described above, the coupling member 33 has a shape with no distinction between the front and the back.

Next, the coupling of the bracket 32 to the mounting portion 31 by the coupling member 33 will be described.
The cylindrical portion 74 of the bracket 32 shown in FIG. 2 is fitted to the cylindrical outer peripheral surfaces 61 and 65 of the mounting portion 31 on the inner peripheral surface 82 thereof. Then, the end surface 81 of the cylindrical part 74 contacts the stepped surface 43 of the mounting part 31, and the communication hole 85 communicates with the concave part 51 of the mounting part 31. At this time, the communication hole 85 and the recess 51 are in a state where the positions of the surface 86 and the wall surface 62 are aligned and the positions of the surface 87 and the wall surface 64 are aligned.

  In this state, the above-described coupling member 33 is inserted into the communication hole 85 of the bracket 32 with the pair of extending portions 102 as the head, as shown in FIG. Then, the connecting member 33 stops when the extending portions 102, 102 contact the inner peripheral surface 82 of the cylindrical portion 74 through the communication hole 85, the recess 51.

  Next, the coupling member 33 is driven through the jig J from the radially outer side of the cylindrical portion 74. The jig J has the same thickness and width as the coupling member 33, and has a cylindrical concave surface Ja that is curved at the tip thereof similarly to the outer cylindrical surface 106 of the main plate portion 101 of the coupling member 33. ing. When the jig J is inserted into the communication hole 85 and the coupling member 33 is driven in a state where the concave surface Ja is in contact with the outer cylindrical surface 106, the coupling member 33 extends as shown in FIG. The portions 102 and 102 are plastically deformed in an arc shape so that the tip ends thereof are close to each other, following the shapes of the inner peripheral surface 82 and the concave portion 51 of the cylindrical portion 74. 2 is guided by the wall surface 62 of the recess 51 and the other surface 103 is guided by the wall surface 64 of the recess 51, and the inner surface 111 shown in FIG. 111 are guided by the cylindrical bottom surface 63 of the recess 51, and the outer surfaces 112, 112 are guided by the inner peripheral surface 82 of the cylindrical portion 74 to be deformed.

  Further, when driven by the jig J as described above, the coupling member 33 causes the main plate portion 101 to abut the cylindrical bottom surface 63 with the inner cylindrical surface 105 so that the mounting portion 31 is torso, as shown in FIG. The portion 71 is pressed against the side opposite to the communication hole 85, and the proximal end side of the main plate portion 101 and the extension portions 102, 102 is restricted by the recess 51, so that the size in the plate width direction is increased and the plate thickness direction is increased. The dimensions are also enlarged. As a result, the coupling member 33 is in a state of being simultaneously pressed against the side surfaces 88, 88 of the communication hole 85 and the cylindrical bottom surface 63 of the recess 51, and the surfaces 86, 87 of the communication hole 85 and the recess 51 are formed as shown in FIG. It will be in the state which press-contacts also to the wall surface 62 and the wall surface 64 simultaneously. That is, the coupling member 33 is inserted in a tight state with respect to the recess 51 and the communication hole 85.

  In this state, even if a force is applied to the bracket 32 in the direction of coming off from the mounting portion 31, the surface 86 of the communication hole 85 of the bracket 32 comes into contact with the one surface 103 of the coupling member 33 facing the coupling member 33. Since the other surface 103 is in contact with the wall surface 64 of the recess 51, the movement of the bracket 32 is restricted. That is, the bracket 32 is coupled to the mounting portion 31 and cannot be removed. In other words, the coupling member 33 is inserted into the recess 51 through the communication hole 85 and couples the mounting portion 31 and the bracket 32. Moreover, since the coupling member 33 is in pressure contact with the surfaces 86 and 87 of the communication hole 85 and the wall surface 62 and the wall surface 64 of the recess 51 at the same time, the bracket 32 moves in the axial direction with respect to the mounting portion 31 in both directions. Therefore, the backlash in the axial direction with respect to the mounting portion 31 of the bracket 32 is restricted.

  In addition, in the state where the mounting portion 31 and the bracket 32 are coupled, the coupling member 33 has the extending portions 102 and 102 that wrap around to the opposite side of the communication hole 85 of the concave portion 51 as shown in FIG. Therefore, the removal from the communication hole 85 is restricted. Further, the coupling member 33 is in pressure contact with the side surfaces 88, 88 of the communication hole 85, and is also in pressure contact with the surfaces 86, 87 of the communication hole 85 and the wall surface 62 and the wall surface 64 of the recess 51 as shown in FIG. The slipping from the communication hole 85 is also restricted by the friction between them. In addition, the coupling member 33 is in contact with the cylindrical bottom surface 63 of the mounting portion 31 during driving and presses the mounting portion 31 to the side opposite to the communication hole 85 of the trunk portion 71. Movement of the bracket 32 in the radial direction with respect to the mounting portion 31 is restricted in all directions, and the radial play of the bracket 32 with respect to the mounting portion 31 is restricted.

  In the above-mentioned Patent Document 1, the mounting bracket body is fitted to the end of the piston rod, and the half member is fitted into the groove of the piston rod, and these are coupled by bolts, thereby fixing the mounting bracket body to the piston. A structure for attaching to a rod is disclosed. By setting it as such a structure, the shape of the rod before mounting | wearing a mounting bracket main body, a half member, and a volt | bolt becomes a simple shape. As a result, it is possible to easily mask the protruding portion of the rod from the cylinder when painting the cylinder, and the painting productivity can be improved. However, the assembly work of the mounting bracket main body after painting becomes complicated, and the productivity during the assembly work is reduced. Also, a structure in which a screw is formed at the end of the rod and the bracket is screwed together can simplify the shape of the rod and improve the productivity of painting, but it is necessary to form a male screw and a female screw. , Productivity in the processing process is reduced.

  On the other hand, the cylinder device 10 according to the first embodiment has a simple shape in which the rod 12 includes the shaft portion 41 in which the recess 51 is formed and the main shaft portion 42 before the bracket 32 is attached to the rod 12. I am doing. Thereby, these can be satisfactorily covered by a simple operation of inserting the main shaft portion 42 and the mounting portion 31 of the rod 12 protruding from the cylinder 11 into the cylindrical masking member. Further, in a state before the bracket 32 is attached to the cylinder 11, the mounting portion 31 of the attachment member 19 of the cylinder 11 has a simple shape having the shaft portion 41 in which the concave portion 51 is formed. Thereby, this can be satisfactorily covered by a simple operation of inserting the mounting portion 31 of the mounting member 19 into the cylindrical masking member. Therefore, the productivity of painting can be improved. Further, since it is only necessary to insert the coupling member 33 into the communication hole 85 and the recess 51 after the bracket 32 is fitted to the mounting portion 31, it is possible to improve the productivity of the assembly work of the bracket 32. Moreover, since the communication hole 85 should just be formed in the bracket 32 and the recessed part 51 should just be formed in the mounting part 31, the improvement in the productivity in a manufacturing process can also be aimed at.

  Further, since the coupling member 33 has a bifurcated shape having two extending portions 102 and 102, and these two extending portions 102 and 102 are fitted to the concave portion 51 on both sides in the radial direction, the coupling strength is increased. Can be improved. Moreover, the play with respect to the mounting part 31 of the bracket 32 can be suppressed.

  In addition, since the coupling member 33 is inserted in a tight state with respect to the communication hole 85 and the recess 51, the coupling member 33 can be pressed against the mounting portion 31 and the bracket 32. Therefore, rattling of the bracket 32 with respect to the mounting portion 31 can be suppressed.

  Here, since the cylinder device 10 generates an urging force in the extending direction, the load applied to the brackets 32 and 32 is usually the load applied to the close proximity side, which is the direction against the urging force, It becomes higher than the load applied to the mutually separated sides. The brackets 32 and 32 can directly transmit the high load applied to the adjacent sides to the high-strength rod 12 and the cylinder 11 with the cylindrical portions 74 and 74 coming into contact with the step portions 44 and 44. On the other hand, the brackets 32 and 32 transmit the load applied to the mutually separated side (the axially outer side in the cylinder device 10) to the rod 12 and the cylinder 11 via the coupling members 33 and 33. However, since this load is low, it is not necessary to increase the size of the coupling members 33 and 33 or to use a hard material that is difficult to drive.

  In the cylinder device 10, only one of the above-described mounting structure portions 55 and 56 may be employed. That is, the bracket 32 may be coupled to the mounting portion 31 at the end of at least one of the cylinder 11 and the rod 12 by the coupling member 33.

“Second Embodiment”
Next, a second embodiment according to the present invention will be described mainly with reference to FIGS. 7 and 8 focusing on differences from the first embodiment. In addition, about the site | part which is common in 1st Embodiment, it represents with the same name and the same code | symbol.

  In the second embodiment, a bracket 32A that is partially different from the bracket 32 (see FIG. 6) of the first embodiment is used. This bracket 32A has a cylindrical portion 74A that is partially different from the cylindrical portion 74 of the first embodiment. Specifically, the cylindrical portion 74A is formed with the bottom portion 72 of the first embodiment. The shape is almost the same as that of the body 71 of the first embodiment. Therefore, the opening part 120 is also formed in the cylindrical part 74A on the side opposite to the opening part 73. And 75 A of attachment parts are formed so that it may extend in an axial direction from the radial direction one side part of 74 A of cylindrical parts. The attachment portion 75A extends from the cylindrical portion 74A with the thickness direction aligned with the radial direction of the cylindrical portion 74A. Therefore, the bracket 32A has a mounting portion 75A on one end side and a cylindrical portion 74A having no bottom on the other end side. The bracket 32A has an attachment hole 77A formed in the attachment portion 75A along the thickness direction, and is rotatably connected to the connection object by a member inserted into the attachment hole 77A.

The end surface 81 and the inner peripheral surface 82 of the cylindrical portion 74A are the same as those in the first embodiment. The cylindrical portion 74A is provided with a communication hole 85 similar to that of the first embodiment penetrating in the radial direction. Unlike the first embodiment, a second communication hole 122 is formed at a position facing the communication hole 85. ing. The communication holes 85 and 122 are formed so that their circumferential centers are on the same straight line. In other words, the positions of the cylindrical portions 74A are different from each other by 180 degrees in the circumferential direction by matching the axial positions of the cylindrical portions 74A. Is formed. The second communication hole 122 has a surface 86 </ b> A that is disposed in the same plane as the surface 86 of the communication hole 85, and a surface 87 </ b> A that is disposed in the same plane as the surface 87 of the communication hole 85. The axial dimension is the same as that of the communication hole 85, while the circumferential width is narrower than that of the communication hole 85.
Further, the inner peripheral surface 82 is formed with an inner peripheral groove 121 having the same axial dimension as the concave portion 51 and the communication holes 85 and 122.

  In the second embodiment, such a bracket 32A is fitted to the mounting portion 31 similar to the first embodiment. At that time, the cylindrical portion 74A of the bracket 32A is fitted to the cylindrical outer peripheral surfaces 61 and 65 of the mounting portion 31 on the inner peripheral surface 82 thereof. As a result, the end surface 81 of the cylindrical portion 74 </ b> A comes into contact with the stepped surface 43 of the mounting portion 31 and the two communication holes 85 and 122 communicate with the recess 51 of the mounting portion 31. At this time, in the communication holes 85 and 122 and the recess 51, the positions of the surfaces 86 and 86A and the wall surface 62 are aligned, and the positions of the surfaces 87 and 87A and the wall surface 64 are aligned. The recess 51 is also in a state where the axial position is aligned with the inner circumferential groove 121.

  In this state, the coupling member 33C having a pair of longer extending portions 102C and 102C with respect to the coupling member 33 described above has one pair of the extending portions 102C and 102C at the head, on one inlet side of the bracket 32A (for example, It is inserted into the communication hole 85 on the side far from the mounting portion 75A. Then, the coupling member 33C is inserted into the communication hole 122 on the other outlet side through the recess 51 and the inner circumferential groove 121, with the extended portions 102C and 102C passing through the communication hole 85 on the inlet side. The cylindrical surface 105 comes into contact with the cylindrical bottom surface 63 of the recess 51 and stops.

In this state, when the main plate portion 101 of the coupling member 33C is driven from the outside in the radial direction of the cylindrical portion 74A by the same jig J as in the first embodiment, the coupling member 33C becomes the main plate portion as in the first embodiment. 101 is in contact with the cylindrical bottom surface 63 at the inner cylindrical surface 105 and presses the mounting portion 31 against the communication hole 122 side on the outlet side of the cylindrical portion 74A. By restricting the movement, the dimension in the plate width direction is enlarged and the dimension in the plate thickness direction is also enlarged. As a result, the coupling member 33C comes into pressure contact with the surfaces 86 and 87 and the side surfaces 88 and 88 of the communication hole 85 on the inlet side and the wall surface 62 and the wall surface 64 of the recess 51 simultaneously. That is, the coupling member 33C is inserted in a tight state with respect to the recess 51 and the communication hole 85 on the inlet side.
Further, the ends of the extending portions 102C and 102C of the coupling member 33C enter the communication hole 122, and further, the side surfaces of the extending portions 102C and 102C enter the recess 51 and the inner peripheral groove 121.

  In this state, even if a force is applied to the bracket 32A so as to come out of the mounting portion 31, the surface 86 of the communication hole 85 on the inlet side of the bracket 32A comes into contact with the one surface 103 of the coupling member 33C facing the coupling member 33C. Since the other surface 103 of the member 33C is in contact with the wall surface 64 of the recess 51, the movement of the bracket 32A is restricted. That is, the bracket 32A is coupled to the mounting portion 31 and cannot be removed. Moreover, since the coupling member 33C is in pressure contact with the surfaces 86 and 87 of the communication hole 85 on the inlet side and the wall surface 62 and the wall surface 64 of the recess 51 at the same time, the bracket 32A moves in the axial direction with respect to the mounting portion 31. Is restricted in both directions, and the backlash in the axial direction of the mounting portion 31 of the bracket 32A is restricted.

  Furthermore, in 2nd Embodiment, the front-end | tip of the extension parts 102C and 102C of the coupling member 33C enters the communicating hole 122, and further, the side surfaces of the extension parts 102C and 102C enter the recess 51 and the inner peripheral groove 121. Since the force in the direction of pulling out from the mounting portion 31 of the bracket 32A is received over substantially the entire circumference, the structure is more complicated than in the first embodiment, but the structure is more resistant to the pulling force.

  According to such 2nd Embodiment, the front-end | tip of the extension parts 102C and 102C after the plastic deformation of the coupling member 33C becomes visible through the communicating hole 122 on the outlet side. Therefore, whether or not the coupling member 33C has been driven in normally and the coupling member 33C has been normally coupled to the mounting portion 31 of the bracket 32A (the extension portions 102C and 102C have a predetermined amount in the communication hole 122). It can be visually confirmed.

  Here, in the second embodiment, the extension part 102C of the coupling member 33C is set longer, and the extension part 102C coming out from the communication hole 122 on the outlet side after or simultaneously with the driving of the coupling member 33C. , 102C are crimped and deformed into an arc shape, for example, in the same manner as in the first embodiment, and pressed against the cylindrical bottom surface 63 of the recess 51, or pressed against the wall surfaces 62 and 64 of the recess 51, You may press-contact to the communicating hole 122. FIG. The configurations of the inner peripheral groove 121 and the communication hole 122 can also be applied to the first embodiment.

“Third Embodiment”
Next, a third embodiment according to the present invention will be described mainly based on FIGS. 9 to 12 with a focus on differences from the first and second embodiments. In addition, about the site | part which is common in 1st, 2nd embodiment, it represents with the same name and the same code | symbol.

  In the third embodiment, as shown in FIG. 9, a bracket 32B that is partially different from the bracket 32 (see FIG. 6) of the first embodiment is used. This bracket 32B has a cylindrical portion 74B that is partially different from the cylindrical portion 74 of the first embodiment, and specifically, a barrel portion 71B that is partially different from the barrel portion 71 of the first embodiment. Have. The body 71B has two communication holes 85B that are partially different from the communication holes 85 of the first embodiment.

  The communication holes 85B and 85B are respectively located on the side close to the end surface 81 and along the circumferential direction of the body 71B, on the side far from the end surface 81 and parallel to the end surface 81, and the surface 86B. , 87B, one end side surface 88B connecting the end portions of the body portion 71B parallel to the axial direction and the radial direction, and the other end edge portions of the surfaces 86B, 87B are connected to each other in the axial direction of the body portion 71B. And the other side surface along the radial direction (not shown because of the cross section). The surface 86B is inclined with respect to the radial direction of the body 71B. That is, the surface 86B is inclined at an angle α shown in FIG. 12 with respect to the radial direction of the body portion 71B so that the axial position of the body portion 71B is positioned closer to the end surface 81 toward the radially outer side of the body portion 71B. Yes. As shown in FIG. 9, the surface 87B has a minimum distance between the surface 86B and the distance between the surfaces 86 and 87 of the first embodiment. The communication holes 85B and 85B are formed on the same straight line. In other words, the communication holes 85B and 85B are formed so that the positions of the cylindrical portions 74B are different from each other by 180 degrees in the circumferential direction.

  As shown in FIG. 10, in the third embodiment, a coupling member 33B that is partially different from the coupling member 33 of the first embodiment is used. The coupling member 33B has a main plate portion 101B that is partially different from the main plate portion 101 of the first embodiment. The main plate portion 101B is formed with a pair of projecting portions 141 and 141 projecting on both sides in the plate thickness direction at the end edge opposite to the extending side of the extending portions 102 and 102. Therefore, the main plate portion 101B has surfaces 103B and 103B in which the areas of the projecting portions 141 and 141 are reduced and the shapes are changed with respect to the surfaces 103 and 103 of the first embodiment.

  The projecting portions 141 and 141 each have a flat sloped surface 142 that slopes and extends so as to be located on the opposite side of the extending side of the projecting portions 102 and 102 from the surface 103B toward the projecting tip side. 142 has a flat surface 143 extending from the edge of the side opposite to the surface 103B to the side opposite to the extending side of the extending portions 102, 102 in parallel with the surface 103B.

  The main plate portion 101B is formed with a flat surface 106B along the plate thickness direction on the side opposite to the extending side of the extending portions 102, 102. This surface 106B is a part of the protruding portions 141, 141. Is configured. The main plate portion 101B is formed with a pair of outer side surfaces 107B and 107B on both sides in the plate width direction, and these outer side surfaces 107B and 107B also constitute part of the protruding portions 141 and 141. One outer surface 107B is disposed in the same plane as the outer surface 112 of one extension 102, and the other outer surface 107B is disposed in the same plane as the outer surface 112 of the other extension 102. The coupling member 33B is also bifurcated, in other words, U-shaped, and has a shape that does not distinguish between the front and the back. The angle β shown in FIG. 12 formed by the surface 103B and the inclined surface 142 connected thereto is smaller than the angle α related to the surface 86B of the communication hole 85B.

  As shown in FIG. 9, also in the third embodiment, the cylindrical portion 74 </ b> B of the bracket 32 </ b> B is fitted to the cylindrical outer peripheral surfaces 61 and 65 of the mounting portion 31 on the inner peripheral surface 82. As a result, the end surface 81 of the cylindrical portion 74B comes into contact with the stepped surface 43 of the mounting portion 31, and the two communication holes 85B and 85B are in communication with the concave portion 51 of the mounting portion 31. At this time, the communication holes 85B and 85B and the recess 51 are aligned with the inner end edge portion of the surfaces 86B and 86B in the radial direction of the cylindrical portion 74B and the wall surface 62, and the surfaces 87B and 87B are attached more than the wall surface 64. It will be located on the part 75 side.

  In this state, the coupling member 33B shown in FIG. 10 is inserted into the communication hole 85B on one inlet side of the bracket 32B with the pair of extending portions 102 and 102 as the head. Then, in the coupling member 33B, the extending portions 102, 102 pass through the communication hole 85B on the inlet side, pass through the recess 51, and are inserted into the communication hole 85B on the other outlet side, and one protrusion 141 of the main plate portion 101B has the inlet. Stops by contacting the surface 86B of the side communication hole 85B.

  In this state, the coupling member 33B is driven by a jig (see jig J in FIG. 5A) from the outside in the radial direction of the cylindrical portion 74B. Here, although not shown in the drawing, the jig for the third embodiment is thickened according to the shape of the communication hole 85B, and one surface in the thickness direction is inclined according to the surface 86B. ing. When driven by a jig, the main plate portion 101B is restricted from moving away from the stepped portion 44 when the surface 103B facing the wall surface 64 of the recess 51 abuts against the wall surface 64 as shown in FIG. As shown in FIG. 12, the projecting portion 141 that abuts the surface 86B of the communication hole 85B presses the surface 86B toward the stepped portion 44 by its inclination, and plastically deforms while pressing the end surface 81 of the bracket 32B against the stepped surface 43 ( In FIG. 12, the state after deformation of the main plate 101B is indicated by hatching, and the state before deformation is indicated by shading for reference). As a result, as shown in FIG. 11, in the main plate portion 101B, the deformed surface 150 of the projecting portion 141 is in pressure contact with the surface 86B of the communication hole 85B on the inlet side, and the opposing surface 103B and the wall surface 64 are in pressure contact. In addition, the movement of the main plate portion 101B is mainly restricted by the recess 51, whereby the size in the plate thickness direction is increased and the size in the plate width direction is also increased. As a result, the coupling member 33B comes into pressure contact with the surface 87B of the communication hole 85B on the inlet side, one side surface 88B, and the other side surface (not shown).

  In this state, even if a force is applied to the bracket 32B so as to come out of the mounting portion 31, the surface 86B of the communication hole 85B on the inlet side of the bracket 32B comes into contact with the surface 150 of the coupling member 33B facing the coupling member 33B. Since the surface 103B is in contact with the wall surface 64 of the recess 51 opposite to the surface 103B, the movement of the bracket 32B is restricted. That is, the bracket 32B is coupled to the mounting portion 31 and cannot be removed. Moreover, since the coupling member 33B is in pressure contact with the surface 86B of the communication hole 85B on the inlet side and the wall surface 64 of the recess 51 at the same time, the bracket 32B is combined with the contact between the end surface 81 and the step surface 43. Is restricted in both directions from moving in the axial direction with respect to the mounting portion 31, and the backlash in the axial direction with respect to the mounting portion 31 of the bracket 32B is restricted.

  In addition, the coupling member 33B is in pressure contact with the surfaces 86B and 87B, the one side surface 88B, and the other side surface (not shown) of the communication hole 85B on the inlet side when the mounting portion 31 and the bracket 32B are coupled. , And the friction between them restricts the escape from the communication hole 85B on the inlet side. In addition, since the coupling member 33B presses against the cylindrical bottom surface 63 of the mounting portion 31 and presses the mounting portion 31 against the body portion 71B when driven, the bracket 32B is caused to radially move with respect to the mounting portion 31 by the friction described above. The movement is restricted in all directions, and the play in the radial direction with respect to the mounting portion 31 of the bracket 32B is restricted.

  As described above, the coupling member 33B is positioned in the axial direction with respect to the mounting portion 31 of the bracket 32B by bringing the end surface 81 of the cylindrical portion 74B into contact with the step surface 43 of the step portion 44.

  According to the third embodiment, the coupling member 33B performs axial positioning with respect to the mounting portion 31 of the bracket 32B by bringing the end surface 81 of the cylindrical portion 74B into contact with the step surface 43 of the step portion 44. Therefore, the step surface 43 of the step portion 44 and the end surface 81 of the cylindrical portion 74B can always be kept in contact with each other. Therefore, even if a high load in the axial direction in the cylinder device 10 is applied to the bracket 32B, the cylindrical portion 74B is in contact with the stepped portion 44, so that an unnecessary load is suppressed from being applied to the coupling member 33B. it can. Therefore, the load bearing performance can be improved.

  Here, in the third embodiment, after or simultaneously with the above-described driving of the coupling member 33B, the distal ends of the extension portions 102 and 102 inserted into the communication hole 85B on the outlet side are crimped, for example, Similarly to the first embodiment, it may be deformed into an arc shape so as to be brought into pressure contact with the cylindrical bottom surface 63 of the recess 51, press against the wall surfaces 62 and 64 of the recess 51, or press contact with the communication hole 85 B on the outlet side.

“Fourth Embodiment”
Next, a fourth embodiment according to the present invention will be described mainly with reference to FIGS. 13 and 14 with a focus on differences from the third embodiment. In addition, about the site | part common to 3rd Embodiment, it represents with the same name and the same code | symbol.

  As shown in FIG. 13, in the fourth embodiment, a bracket 32 </ b> B similar to the third embodiment is attached to a mounting portion 31 </ b> C that is partially different from the mounting portion 31 (see FIG. 11) of the first to third embodiments. It couple | bonds by the coupling member 33B similar to embodiment. Although the mounting portion 31C has the shaft portion 41 in which the same recess 51 as that in the first to third embodiments is formed, the mounting portion 31C contacts the end surface 81 in a state where the cylindrical portion 74B of the bracket 32B is fitted. The stepped portion 44 of the first to third embodiments that can contact is not formed. That is, in the mounting portion 31C, the end surface 67 can come into contact with the bottom surface 83 of the bottom portion 72 of the bracket 32B.

  In the fourth embodiment, the cylindrical portion 74B of the bracket 32B is fitted to the cylindrical outer peripheral surfaces 61 and 65 of the mounting portion 31C on the inner peripheral surface 82 thereof. Then, the bottom surface 83 of the bottom portion 72 of the bracket 32B comes into contact with the end surface 67 of the mounting portion 31C. In this state, the communication holes 85B and 85B of the bracket 32B communicate with the recess 51 of the mounting portion 31C. At this time, as in the third embodiment, the communication holes 85B and 85B and the recess 51 have the positions of the inner end edge and the wall surface 62 in the radial direction of the cylindrical portion 74B of the surfaces 86B and 86B, and the surfaces 87B and 87B. Is positioned closer to the mounting portion 75 than the wall surface 64.

  In this state, as in the third embodiment, the coupling member 33B is inserted into the communication hole 85B on one inlet side of the bracket 32B with the pair of extending portions 102, 102 as the head. Then, in the coupling member 33B, the extended portions 102, 102 pass through the inlet-side communication hole 85B, pass through the recess 51, and are inserted into the other outlet-side communication hole 85B, so that the protruding portion 141 of the main plate portion 101B shown in FIG. Stops in contact with the surface 86B of the communication hole 85B on the inlet side.

  In this state, when the coupling member 33B is driven by a jig from the outside in the radial direction of the cylindrical portion 74B as in the third embodiment, the main plate portion 101B faces the wall surface 64 of the recess 51 shown in FIG. The movement in the direction in which 103B abuts against the wall surface 64 and approaches the end surface 67 is restricted, and as shown in FIG. 14, the protrusion 141 that abuts the surface 86B of the communication hole 85B causes the surface 86B to be inclined. 13 is pressed in the opposite direction to the end surface 67 and is plastically deformed while pressing the bottom surface 83 of the bracket 32B against the end surface 67 (in FIG. 14, the state after deformation of the main plate portion 101B is hatched, and the state before deformation is shown for reference. (Shaded) As a result, as shown in FIG. 13, in the main plate portion 101B, the deformed surface 150 of the projecting portion 141 is in pressure contact with the surface 86B of the communication hole 85B on the inlet side, and the opposing surface 103B and the wall surface 64 are in pressure contact. In addition, the movement of the main plate portion 101B is mainly restricted by the recess 51, whereby the size in the plate thickness direction is increased and the size in the plate width direction is also increased. As a result, the coupling member 33B comes into pressure contact with the surface 87B of the communication hole 85B on the inlet side, one side surface 88B, and the other side surface (not shown).

  In this state, even if a force is applied to the bracket 32B so that the bracket 32B can be removed from the mounting portion 31C, the surface 86B of the communication hole 85B on the inlet side of the bracket 32B comes into contact with the surface 150 of the coupling member 33B facing the coupling member 33B. Since the surface 103B is in contact with the wall surface 64 of the recess 51 opposite to the surface 103B, the movement of the bracket 32B is restricted. That is, the bracket 32B is coupled to the mounting portion 31C and cannot be removed. Moreover, since the coupling member 33B is in pressure contact with the surface 86B of the communication hole 85B on the inlet side and the wall surface 64 of the recess 51 at the same time, the bracket 32B is combined with the contact between the bottom surface 83 and the end surface 67. Movement in the axial direction with respect to the mounting portion 31C is restricted in both directions, and the backlash in the axial direction of the bracket 32B with respect to the mounting portion 31C is restricted.

  In addition, the coupling member 33B is in pressure contact with the surfaces 86B and 87B, the one side surface 88B, and the other side surface (not shown) of the communication hole 85B on the inlet side when the mounting portion 31C and the bracket 32B are coupled. , And the friction between them restricts the escape from the communication hole 85B on the inlet side. In addition, since the coupling member 33B is pressed against the cylindrical bottom surface 63 of the mounting portion 31C during driving and presses the mounting portion 31C against the body portion 71B, the bracket 32B is diametrically opposed to the mounting portion 31C by the friction described above. The movement is restricted in all directions, and the play in the radial direction with respect to the mounting portion 31C of the bracket 32B is restricted.

  As described above, the coupling member 33B is positioned in the axial direction with respect to the mounting portion 31C of the bracket 32B by bringing the mounting portion 31C into contact with the bottom portion 72 of the cylindrical portion 74B.

  According to such a fourth embodiment, the coupling member 33B positions the mounting portion 31C in the axial direction with respect to the mounting portion 31C of the bracket 32B by bringing the mounting portion 31C into contact with the bottom portion 72 of the cylindrical portion 74B. 31C and the bottom part 72 of the cylindrical part 74B can always be kept in contact with each other. Therefore, even when a high load in the axially inner direction in the cylinder device 10 is applied to the bracket 32B, the cylindrical portion 74B is in contact with the bottom portion 72, so that an unnecessary load can be suppressed from being applied to the coupling member 33B. . Therefore, the load bearing performance can be improved.

  Here, also in the fourth embodiment, after the above-described driving of the coupling member 33B or simultaneously with the driving, the distal ends of the extension portions 102 and 102 inserted into the communication hole 85B on the outlet side are crimped, for example, Similarly to the first embodiment, it may be deformed into an arc shape so as to be brought into pressure contact with the cylindrical bottom surface 63 of the recess 51, press against the wall surfaces 62 and 64 of the recess 51, or press contact with the communication hole 85 B on the outlet side. .

  The embodiment described above is a cylinder device having a cylinder and a rod that moves relative to the cylinder, and the mounting portion at the end of at least one of the cylinder and the rod has an outer periphery. An annular recess is formed in the part, a bracket that is fitted to the outer peripheral part of the mounting part and has a communication hole that communicates with the recess at a position facing the recess, and the communication hole to the recess A bifurcated coupling member that is inserted to couple the mounting portion and the bracket; As a result, it is only necessary to fit the bracket to the mounting portion, insert the coupling member into the communication hole, and drive it into the recess, so that the productivity of the bracket assembly work can be improved. Therefore, productivity can be improved.

  In addition, the bracket has a mounting portion on one end side and a cylindrical portion on the other end side, and the inner side in the axial direction is closer to the inner side in the axial direction than the concave portion of the outer peripheral portion of the mounting portion. A step portion having a large diameter is provided, and the cylindrical portion is brought into contact with the step portion to perform axial positioning of the bracket with respect to the mounting portion. Thereby, since the load of the axial direction input from a bracket can be transmitted favorably to a mounting part, load bearing performance can be improved.

  The bracket has a mounting portion on one end side and a cylindrical portion with a bottom on the other end side, and the mounting portion of the bracket is brought into contact with the bottom portion of the cylindrical portion. Position in the axial direction relative to the part. Thereby, since the load of the axial direction input from a bracket can be transmitted favorably to a mounting part, load bearing performance can be improved.

Moreover, since the said coupling member is inserted in a tight state with respect to the said recessed part, a coupling member can be press-contacted to a mounting part.
The coupling member is inserted into the concave portion after being plastically deformed.

DESCRIPTION OF SYMBOLS 10 Cylinder apparatus 11 Cylinder 12 Rod 31 Mounting part 32 Bracket 33 Connecting member 44 Step part 51 Recess 72 Bottom part 74, 74A, 74B Cylindrical part 75, 75A Attachment part 85, 85B Communication hole

Claims (7)

A method of manufacturing a cylinder device having a cylinder and a rod that moves relative to the cylinder,
The annular recess formed in the outer peripheral portion of the mounting portion of the at least one end of said cylinder and said rod,
Wherein the outer peripheral portion of the mounting portion, arranged before Symbol with communication hole fitted a bracket having a tubular portion which is made shape so as to communicate with the recess into the recess and a position opposed to
A coupling member is inserted from the communication hole toward the recess, and is plastically deformed according to the shape of the inner peripheral surface of the cylindrical portion and the recess of the bracket, thereby coupling the mounting portion and the bracket. A method for manufacturing a cylinder device. The coupling member has a pair of extending portions that are bifurcated,
It said coupling member, said the side of the communication hole is pressed against to the wall surface of the recess is inserted into tight state with respect to the communication hole and the recess, the axial direction of rattling with respect to the mounting portion of the bracket regulations, and the pair of cylinder apparatus according to claim 1, wherein the coupling the said mounting portion by plastically deformed write around the opposite side useless bracket and the extending portion and the communicating hole of the recess Manufacturing method. Before SL stepped portion axially inwardly becomes larger diameter than the axial outer is provided axially inward from the recess of the outer peripheral portion of the mounting portion,
3. The method of manufacturing a cylinder device according to claim 1, wherein axial positioning of the bracket with respect to the mounting portion is performed by bringing the cylindrical portion into contact with the stepped portion. The cylindrical part is bottomed,
3. The method of manufacturing a cylinder device according to claim 1, wherein the mounting portion is brought into contact with a bottom portion of the cylindrical portion to perform axial positioning of the bracket with respect to the mounting portion. The coupling member is inserted into tight state with respect to the recess, the manufacturing method of the cylinder device according to claim 1, characterized that you regulate exit from the communicating hole. Before SL coupling member has a pair of extending portions to be forked, the pair of extending portions, each of the distal end side to each other along the shape of the inner peripheral surface and the concave portion of the tubular portion proximity method for producing a cylinder apparatus according to any one of claims 1 to 5, characterized in Rukoto is plastically deformed so as to. The cylindrical portion of the bracket is provided with a second communication hole at a position facing the communication hole,
The cylinder manufacturing method according to any one of claims 1 to 6, wherein a tip of the coupling member is inserted so as to be positioned in the second communication hole.

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