JP6519398B2 - Cylinder device - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a cylinder device used as a vibration control damper that suppresses the vibration of a structure such as a high-rise building.

  A cylinder device called a seismic damper is attached to a structure such as a high-rise building. This cylinder device absorbs vibrational energy when the structure shakes, and reduces damage to the structure. The cylinder device comprises, for example, a piston rod, a cylinder, and a mounting member provided at the end of the piston rod and the cylinder. (See, for example, Patent Document 1).

  When the cylinder device is attached to a structure, for example, the cylinder device is disposed between a pair of opposed columns at intervals, the attachment member on the piston rod side is attached to one of the columns, and the attachment member on the cylinder side is attached to the other column. It is configured to be attached.

JP, 2008-190544, A

  Here, it is desirable to reduce the overall length of the cylinder device so that it can be mounted also between the closely spaced columns. Also, nowadays, in order to improve the durability of existing buildings, retrofitting cylinder devices for damping are sometimes attached. In this case, since the building is not specially designed for mounting the cylinder device, it can not be mounted if the overall length of the cylinder device is large, and there is a problem that the degree of freedom of mounting is reduced.

  The present invention has been made in view of the problems of the prior art described above, and it is an object of the present invention to provide a cylinder device capable of improving the degree of freedom of attachment to a structure by reducing the overall length dimension. is there.

  In order to solve the problems described above, the present invention provides a cylinder device comprising a piston rod, a cylinder, and a mounting member provided on at least one of the piston rod or the cylinder, wherein the mounting member has a center point The end of the large-diameter partial sphere is made to face the end of the large-diameter partial sphere and the small-diameter partial sphere smaller in diameter than the large-diameter partial sphere with the same diameter but different from each other. And an inner member having a connecting surface connected so that the ends of the small diameter portion spherical surfaces are axially separated from each other, and an outer member having an inner circumferential surface slidably contacting the large diameter partial spherical surface and the small diameter portion spherical surface It features.

  According to the present invention, the overall length can be reduced while maintaining high rigidity, and the degree of freedom of attachment to the structure can be improved.

It is a front view of a partial fracture which shows the state which attached the cylinder apparatus by embodiment of this invention between a pair of pillars. It is sectional drawing which expands and shows the existing attachment member provided in the cylinder side of the cylinder apparatus. It is sectional drawing which expands and shows the attachment member by this invention provided in the piston rod side of the cylinder apparatus.

  Hereinafter, the cylinder device according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3 by taking a case where it is mounted between a pair of columns constituting a building as an example. Here, in the present embodiment, among the attachment members provided at both ends in the longitudinal direction of the cylinder device, the existing attachment member is disposed at the end portion on the cylinder side, and the attachment according to the present invention is provided to the end portion on the piston rod side. The members are arranged. The existing mounting member and the mounting member of the present invention can be arranged in the opposite mounting position, or the mounting member of the present invention can be arranged at both ends.

  In FIG. 1, the cylinder device 1 is, for example, a so-called vibration control (vibration damping) damper, and can suppress a vibration acting on a building. The cylinder device 1 is disposed between a pair of adjacent pillars 19 and 20 which will be described later among a plurality of pillars supporting a building. The cylinder device 1 is configured to include a piston rod 2, a cylinder 3, a first mounting member 4, a second mounting member 12 and the like described later.

  The piston rod 2 is formed of a cylindrical body, and one end side in the longitudinal direction enters a cylinder 3 described later and is connected to a piston (not shown). On the other hand, the other end 2A of the piston rod 2 protruding from the cylinder 3 is opened at the center of the end face to form a female screw hole 2B, and a second mounting member 12 described later is formed in the female screw hole 2B. It is screwed and attached.

  The cylinder 3 constitutes an outer shell of the cylinder device 1 and is formed in a stepped cylindrical shape in which the diameter of one side portion 3A is smaller and the diameter of the other side 3B is larger. In one side portion 3A of the cylinder 3, a female screw hole 3C is provided at the center of the end face, and in the female screw hole 3C, a shaft constituting an inner member 5 of a first mounting member 4 described later. The external thread 7A of the part 7 is screwed. Further, the cylinder 3 is filled with oil and a piston (not shown) having a mechanism for generating a damping force is slidably fitted in the axial direction, and the piston is The piston rod 2 is connected.

  The first mounting member 4 is provided on one side portion 3A side of the cylinder 3, and the first mounting member 4 is for mounting the cylinder device 1 on one of the pillars 19 described later. Here, the first mounting member 4 is formed to have the existing (conventional) configuration in which the axial length dimension is larger than that of the second mounting member 12 described later. The first mounting member 4 is configured by an inner member 5 and an outer member 9 described later.

  The inner member 5 is generally referred to as a ball stud, and is formed of a spherical ball portion 6 and a shaft portion 7 extending radially outward from the ball portion 6. As shown in FIG. 2, the ball portion 6 of the inner member 5 is configured as a sphere (true sphere) formed with a constant radial dimension R1 around the center point O1. The ball 6 is provided with a protrusion 6A at one end opposite to the shaft 7. The protrusions 6A are used, for example, for positioning (for centering) when the inner member 5 is processed. The outer peripheral surface of the ball portion 6 has a column-side spherical surface 6B on one side from the center point O1, and an axis-side spherical surface 6C on the other side from the center point O1 opposite to the axial direction.

  The shaft 7 is a cylindrical body having sufficient strength, and one end in the longitudinal direction is integrally attached to the ball 6. An external thread 7A is formed on the outer periphery of the other side of the shaft 7, and the external thread 7A is provided on one side 3A of the cylinder 3 and thus is screwed into the screw hole 3C. It is fixed by

  The outer member 9 is generally called a socket, and is formed as a strength member that covers the ball portion 6 of the inner member 5 in a spherical contact state. The outer member 9 is configured by a bracket 10 and a pressing tool 11 described later.

  The bracket 10 is attached to one of the pillars 19 of the ball portion 6 constituting the inner member 5 in surface contact with the shaft-side spherical surface 6C. The bracket 10 is provided with a flange portion 10A at a position facing the column 19, and the flange portion 10A is provided with a plurality of bolt insertion holes 10B (only two are shown). The bracket 10 has an axial length dimension L1 so as to cover the ball portion 6 of the inner member 5.

  Further, in the bracket 10, in order from the flange portion 10A side, a presser accommodating portion 10C having a diameter larger than that of the ball portion 6, and a diameter smaller than that of the ball supporting portion 10C and slightly larger than the ball portion 6 A ball receiving portion 10D, a concave spherical shaft-side pressure receiving surface 10E having a radial dimension R1 slidably in surface contact with the shaft-side spherical surface 6C, and a shaft insertion hole 10F through which the shaft portion 7 is inserted It is provided continuously on one axis (the same axis) passing through.

  A female screw portion 10C1 is engraved on the inner peripheral surface of the presser holder 10C of the bracket 10, and the male screw portion 11A of the clamp 11 is screwed into the female screw portion 10C1. Further, the shaft insertion hole 10F is set to have a sufficiently larger inner diameter than the shaft portion 7 in order to allow the inner member 5 to be displaced in the rotational direction (rotational direction) with respect to the outer member 9.

  Here, as shown in FIG. 2, the shaft-side pressure receiving surface 10E can not be in sliding contact with the entire surface of the shaft-side spherical surface 6C of the ball portion 6 because the shaft insertion hole 10F is provided. Further, in the vicinity of the boundary between the column-side spherical surface 6B and the shaft-side spherical surface 6C, since it is almost parallel to the axis, it does not function as a pressure receiving surface for receiving an axial load. Thus, the shaft-side pressure receiving surface 10E is formed as an annular concave spherical surface, and has a projected area S1 in the axial direction. In this case, the projected area S1 of the shaft-side pressure receiving surface 10E is set to a value that can withstand the maximum value of the damping force generated by the cylinder device 1 in consideration of a sufficient safety factor. The radius dimension R1 of the ball portion 6 is set so as to secure the projection area S1.

  The presser 11 is formed as an annular body that fits in the presser housing portion 10C, and on the outer peripheral surface thereof, an external thread portion 11A screwed to the female thread portion 10C1 is engraved. At the center of the presser 11, a protrusion insertion hole 11B through which the protrusion 6A of the ball portion 6 is inserted is formed. Similar to the shaft insertion hole 10F of the bracket 10 described above, the protrusion insertion hole 11B is set to have a sufficiently larger inner diameter than the protrusion 6A in order to allow displacement of the protrusion 6A in the rotational direction (rotational direction). There is.

  A pillar side pressure receiving surface 11C is provided on the other end side of the pressing tool 11 so as to face the shaft side pressure receiving surface 10E of the bracket 10. The column-side pressure receiving surface 11C is formed as an annular concave spherical surface having an inner diameter dimension and an outer diameter dimension smaller than the shaft-side pressure receiving surface 10E, and a projection area S2 in the axial direction is a projection of the shaft-side pressure receiving surface 10E. It is set equal to the area S1.

  Although the column side pressure receiving surface 11C is provided to avoid the protrusion 6A, the protrusion 6A is used at the time of processing and does not need to be formed to have a large diameter like the shaft portion 7. Therefore, when the protrusion 6A is formed to have a small diameter, the projection area S2 in the axial direction can be secured larger than the projection area S1 of the shaft-side pressure receiving surface 10E in the column-side pressure receiving surface 11C.

  The first mounting member 4 configured in this manner inserts the inner member 5 into the bracket 10 of the outer member 9 from the shaft 7 side, and in this state, the pressing member is inserted into the female screw portion 10C1 of the pressing member storage portion 10C. The 11 male screw portions 11A are screwed together, and the presser 11 is attached in the presser holder 10C. As a result, the shaft-side spherical surface 6C of the ball portion 6 abuts on the shaft-side pressure-receiving surface 10E of the bracket 10, and the column-side spherical surface 6B abuts on the column-side pressure-receiving surface 11C of the presser 11. As a result, the first attachment member 4 can be configured as a ball joint which can rotate the inner member 5 and the outer member 9 in any direction and has high rigidity in the translational direction.

  Next, the configuration of the second mounting member 12 which is a characteristic part of the present embodiment will be described.

  The second mounting member 12 is provided on the other end 2A side of the piston rod 2, and the second mounting member 12 is for mounting the cylinder device 1 to the other post 20 described later. The second mounting member 12 can be formed to have a smaller axial length than the first mounting member 4 described above, for the reason described later. The second mounting member 12 is configured by an inner member 13 and an outer member 16 described later, substantially the same as the first mounting member 4 described above.

  The inner member 13 is referred to as a ball stud in substantially the same manner as the inner member 5 of the first mounting member 4 and includes a substantially spherical ball portion 14 and a shaft portion 15 extending radially outward from the ball portion 14. And are formed. However, as shown in FIG. 3, the inner member 13 of the second mounting member 12 has a plurality of partial spherical surfaces with the same central point and different diameters (radial dimensions), as shown in FIG. It differs from the ball portion 6 of the inner member 5 of the first mounting member 4.

  That is, the ball portion 14 has one large-diameter partial spherical surface 14A formed with a radial dimension R2 centered on the center point O2, and the other small-diameter portion formed with a radial dimension R3 centered on the central point O2. It is comprised including the spherical surface 14B. The end 14E of the large diameter partial sphere 14A and the end 14F of the small diameter partial sphere 14B face each other between the end 14E of the large diameter partial sphere 14A and the end 14F of the small diameter partial sphere 14B. The end 14E of the small diameter portion 14B and the end 14F of the small diameter portion spherical surface 14B are smoothly connected by the tapered connecting surface 14C so as to be axially separated. The shaft portion 15 is integrally provided at the central position of the large diameter partial spherical surface 14A, and a protrusion 14D is provided at the central position of the small diameter partial spherical surface 14B. The protrusions 14D are used, for example, for positioning (for centering) when the inner member 13 is cut, as in the case of the protrusions 6A of the ball portion 6 described above. Further, the central point of the small diameter partial end face circle 14G forming the end 14F of the small diameter partial sphere 14B is configured on the same plane as the central point O2, that is, the large diameter forming the end 14E of the large diameter partial sphere 14A. The partial end surface circle 14H is not on the same plane as the central point O2, and the large diameter partial end surface circle 14H of the large diameter partial spherical surface 14A and the central point O2 are axially separated. With such a configuration, the pressure receiving surface received by the small diameter partial spherical surface 14B smaller in diameter than the large diameter partial spherical surface 14A can be increased, and the high rigidity of the ball portion 14 can be maintained.

  The large diameter partial spherical surface 14A is configured as a spherical body having a radial dimension R2 that is the same as or close to the radial dimension R1 of the ball portion 6 that constitutes the inner member 5 of the first mounting member 4. On the other hand, the small diameter partial spherical surface 14B is configured as a spherical body having a radial dimension R3 (R3 <R2) smaller than the radial dimension R2 of the large diameter partial spherical surface 14A. In this case, the small diameter partial spherical surface 14B can be formed smaller than the radius dimension R2 of the large diameter partial spherical surface 14A for the reason described with the pressure receiving surfaces 17E and 18C described later. Thereby, the ball portion 14 can be axially miniaturized by, for example, the difference between the radial dimension R2 and the radial dimension R3. Further, the end 14E of the large diameter partial spherical surface 14A and the end 14F of the small diameter partial spherical surface 14B are arranged to be axially separated from each other, and the tapered connecting surface 14C is provided between them so that the diameter gradually increases or decreases. Therefore, high rigidity of the ball portion 14 can be maintained.

  The shaft portion 15 is formed of a cylindrical body having sufficient strength in substantially the same manner as the shaft portion 7 described above, and the other end in the length direction is integrally attached to the ball portion 14 (large diameter partial spherical surface 14A) ing. An external thread 15A is formed on one outer periphery of the shaft 15, and the external thread 15A is provided at the other end 2A of the piston rod 2 and is thus screwed into the screw hole 2B. It is fixed in the state.

  Similar to the outer member 9, the outer member 16 is formed as a strength member that covers the ball portion 14 of the inner member 13 in a spherical contact state. Further, the outer member 16 is configured by a bracket 17 and a pressing tool 18 described later. However, the outer member 16 (bracket 17) of the second mounting member 12 is smaller in axial direction than the axial length L1 of the outer member 9 (bracket 10) constituting the first mounting member 4 And has a length dimension L2.

  The bracket 17 is attached to the other pillar 20 while making surface contact with the large diameter partial spherical surface 14 </ b> A of the ball portion 14 constituting the inner member 13. Similar to the bracket 10 of the outer member 9 described above, the bracket 17 is provided with a flange portion 17A at a position facing the column 20, and a plurality of bolt insertion holes 17B (two pieces are provided in the flange portion 17A). Only shown).

  Further, in the bracket 17, from the side of the flange portion 17A, in order from the side of the flange portion 17A, there are a pressing tool accommodating portion 17C having a diameter larger than that of the ball portion 14 and a diameter smaller than that of the pressing tool accommodating portion 17C. A ball receiving portion 17D, a concave spherical shaft-side pressure receiving surface 17E as an inner peripheral surface having a radial dimension R3 slidably in surface contact with the small diameter portion spherical surface 14B, and a shaft insertion hole 17F through which the shaft portion 15 is inserted. Are continuously provided on one axis (the same axis) passing through the center point O2.

  A female screw 17C1 is engraved on the inner peripheral surface of the presser holder 17C of the bracket 17, and the male screw 18A of the presser 18 is engaged with the female screw 17C1. The shaft insertion hole 17F is set to have a sufficiently larger inner diameter than the shaft portion 15 in order to allow the inner member 13 to be displaced in the rotational direction (rotational direction) with respect to the outer member 16.

  Here, as shown in FIG. 3, the shaft-side pressure receiving surface 17E is provided with the shaft insertion hole 17F in the same manner as the shaft-side pressure receiving surface 10E of the bracket 10 described above. It can not slide on the entire surface of the spherical surface 14A. Further, since the shaft-side pressure receiving surface 17E is substantially parallel to the axis near the tapered connection surface 14C, it does not function as a pressure receiving surface for receiving an axial load. Thus, the shaft-side pressure receiving surface 17E is formed as an annular concave spherical surface, and has a projected area S3 in the axial direction. A large diameter partial end surface circle 14H which is an end 14E of the large diameter partial spherical surface 14A and a small diameter partial end surface circle 14G which is an end 14F of the small diameter partial spherical surface 14B are axially separated from each other. The end 14F of the small diameter portion spherical surface 14B is connected by a tapered connecting surface 14C whose diameter gradually increases or decreases. In other words, this can allow the inner member 13 to be displaced in the rotational direction (rotational direction), and ensure the movable range. Further, the shaft side pressure receiving surface 17E and the column side pressure receiving surface 18C can be sufficiently utilized. In the present embodiment, although the tapered connection surface 14C has a linear tapered surface shape, it is not limited to the linear tapered surface shape, and may have an arc shape having a convex or concave curvature. However, it is more desirable to be able to make effective use of space while maintaining the rigidity, if it is tapered so that the diameter gradually increases or decreases.

  In this case, the projected area S3 of the shaft-side pressure receiving surface 17E is set to the same dimension as the projected area S1 of the shaft-side pressure receiving surface 10E. That is, the size of the shaft-side pressure receiving surface 17E is set to a value in which a sufficient safety factor is considered with respect to the maximum value of the damping force generated by the cylinder device 1. The radius dimension R2 of the large diameter partial spherical surface 14A of the ball portion 14 is set so as to secure the projection area S3 of the shaft side pressure receiving surface 17E.

  The presser 18 is formed as an annular body that fits in the presser holder 17C of the bracket 17 like the presser 11 described above, and an external thread 18A is screwed to the female screw 17C1 on the outer peripheral surface thereof. Is engraved. At the center of the presser 18, a protrusion insertion hole 18B is formed through which the protrusion 14D provided on the small diameter portion spherical surface 14B of the ball portion 14 is inserted. The projection insertion hole 18B is set to have a sufficiently larger inner diameter than the projection 14D in order to allow displacement of the projection 14D in the rotational direction (rotational direction).

  A pillar side pressure receiving surface 18C as an inner peripheral surface is provided on the other end side of the pressing tool 18 so as to face the shaft side pressure receiving surface 17E of the bracket 17. The column-side pressure receiving surface 18C is formed as an annular concave spherical surface of a radial dimension R3 having an inner diameter and an outer diameter smaller than the shaft-side pressure receiving surface 17E. The column side pressure receiving surface 18C is set to a value smaller than the shaft side pressure receiving surface 17E of the bracket 17 in any of the inner diameter dimension, the outer diameter dimension, and the radial dimension R3. However, the projected area S4 in the axial direction of the column side pressure receiving surface 18C is set to be equal to the projected area S3 of the shaft side pressure receiving surface 17E for the reason described later.

  Here, the reason why the projected area S4 in the axial direction of the column side pressure receiving surface 18C can be set to a value equivalent to the projected area S3 of the shaft side pressure receiving surface 17E will be described.

  First, the column side pressure receiving surface 18C of the presser 18 is provided so as to avoid the protrusion 14D of the ball portion 14. The protrusions 14D are used, for example, for centering at the time of processing, or portions which do not require spherical processing remain as unprocessed portions. In any case, the protrusions 14D do not have to be formed as large as the shaft portion 15.

  Therefore, by forming the protrusion 14D to a small diameter, the column-side pressure receiving surface 18C can be formed to have a small inside diameter. Thereby, even when the column side pressure receiving surface 18C is formed with a small radius dimension R3, the axial projected area S4 of the column side pressure receiving surface 18C is sufficiently safe against the maximum value of the damping force generated by the cylinder device 1 It is set to an acceptable value in consideration of the rate. That is, the projected area S4 of the column side pressure receiving surface 18C can be set to the same extent as the projected area S3 of the shaft side pressure receiving surface 17E.

  Thus, by securing the projected area S4 in the axial direction of the column-side pressure receiving surface 18C, the ball portion 14 of the inner member 13 has, for example, the radius R2 of the large diameter portion spherical surface 14A and the radius R3 of the small diameter portion spherical surface 14B. Can be miniaturized in the axial direction by the difference between the Thereby, the length dimension L2 of the bracket 17 of the second mounting member 12 is smaller than the length dimension L1 of the bracket 10 of the first mounting member 4 by the above-described difference, and the axial dimension is reduced. It can be formed.

  The second mounting member 12 configured in this manner inserts the inner member 13 into the bracket 17 of the outer member 16 from the side of the shaft portion 15 in the same manner as the first mounting member 4 described above. The male screw 18A of the presser 18 is screwed into the female screw 17C1 of the presser housing 17C, and the presser 18 is mounted in the presser housing 17C. As a result, the large diameter partial spherical surface 14A of the ball portion 14 abuts on the shaft side pressure receiving surface 17E of the bracket 17, and the small diameter partial spherical surface 14B abuts on the column side pressure receiving surface 18C of the presser 18. As a result, the second mounting member 12 can be assembled as a ball joint which can rotate the inner member 13 and the outer member 16 in any direction and has high rigidity in the translational direction.

  The column 19 and the column 20, as shown in FIG. 1, constitute a structure to which the cylinder device 1 is attached. The pillars 19 and the pillars 20 are erected so as to face each other, for example, among a plurality of pillars supporting a building. The one column 19 is provided with a female screw hole 19A into which the bolt 21 inserted into each bolt insertion hole 10B of the bracket 10 constituting the outer side member 9 of the first mounting member 4 is screwed. The other column 20 is provided with a female screw hole 20A into which a bolt 21 inserted into each bolt insertion hole 17B of the bracket 17 constituting the outer member 16 of the second mounting member 12 is screwed.

  The cylinder device 1 according to the present embodiment has the above-described configuration, and the procedure for attaching the attachment members 4 and 12 to the respective columns 19 and 20 will be described.

  For example, the cylinder device 1 is lifted using a lifting tool and disposed between the columns 19 and 20. In this state, each bolt insertion hole 10B of the bracket 10 constituting the first mounting member 4 is aligned with each female screw hole 19A provided in one pillar 19 and inserted into each bolt insertion hole 10B. Screw a bolt 21 into each female screw hole 19A. Thereby, the first attachment member 4 can be attached to one of the pillars 19 in a positioned state.

  Further, each bolt insertion hole 17B of the bracket 17 constituting the second mounting member 12 is aligned with each female screw hole 20A provided in the other pillar 20, and the bolt 21 inserted into each bolt insertion hole 17B. Is screwed into each female screw hole 20A. Thereby, the second attachment member 12 can be attached to the other pillar 20 in a positioned state.

  In a state where the cylinder device 1 is attached between a pair of columns 19 and 20 facing each other at intervals, when the building sways due to an earthquake and the distance between the columns 19 and 20 is displaced, the cylinder device 1 operates the piston in the cylinder 3 By generating a damping force by displacing, it is possible to absorb vibrational energy when the columns 19 and 20 shake and reduce damage to the building.

  Thus, according to the present embodiment, the second mounting member 12 has the large diameter partial spherical surface 14A having the same center point O2 but different diameters, and the small diameter partial spherical surface 14B having a smaller diameter than the large diameter partial spherical surface 14A, The end 14E of the large diameter partial sphere 14A and the end 14F of the small diameter partial sphere 14B are opposed to each other, and the end 14E of the large diameter partial sphere 14A and the end 14F of the small diameter partial sphere 14B are axially separated from each other An inner member 13 having a tapered connection surface 14C, and an outer member 16 having an axial pressure receiving surface 17E as an inner peripheral surface slidingly contacting the large diameter partial spherical surface 14A and the small diameter partial spherical surface 14B, and a column side pressure receiving surface 18C. doing.

  Accordingly, the ball portion 14 of the inner member 13 can be axially reduced by, for example, the difference between the radius R2 of the large diameter partial spherical surface 14A and the radial dimension R3 of the small diameter partial spherical surface 14B. Thereby, the length dimension L2 of the bracket 17 of the second mounting member 12 is smaller than the length dimension L1 of the bracket 10 of the first mounting member 4 by the above-described difference, and the axial dimension is reduced. It can be formed. As a result, the overall length dimension of the cylinder device 1 can be reduced, and the degree of freedom of attachment to the structure such as the columns 19 and 20 can be improved.

  The center point of the small diameter partial end face circle 14G which forms the end 14E of the small diameter partial sphere 14B can be made to coincide with the central point O2 of the large diameter partial sphere 14A and the small diameter partial sphere 14B.

  Also, the inner member 13 of the second mounting member 12 can be attached to the piston rod 2, and the bracket 17 of the outer member 16 can be attached to the other post 20 as a member to which the cylinder 3 is attached. On this side, the ball portion 14 of the inner member 13 has one side on the piston rod 2 side becomes the large diameter partial spherical surface 14A with the large diameter, and the other side becomes the small diameter partial spherical surface 14B with a smaller diameter than the large diameter partial spherical surface 14A. ing. As a result, the length dimension L2 of the bracket 17 of the outer member 16 can be reduced together with the ball portion 14 of the inner member 13, and when each column 19, 20 is approaching, or in a column of an existing building Also, the compact cylinder device 1 can be mounted.

  Furthermore, the outer member 16 has an axial pressure receiving surface 17E with which the large diameter partial spherical surface 14A abuts, and a column side pressure receiving surface 18C with which the small diameter partial spherical surface 14B abuts, and the projected area S4 of the columnar pressure receiving surface 18C is The area is about the same as the projected area S3 of the shaft-side pressure receiving surface 17E. Thus, the ball portion 14 of the inner member 13 can be axially reduced by, for example, the difference between the radial dimension R2 of the large diameter partial spherical surface 14A and the radial dimension R3 of the small diameter partial spherical surface 14B.

  In the embodiment, the case where the ball portion 14 of the inner member 13 has two spherical surfaces of the large diameter partial spherical surface 14A and the small diameter partial spherical surface 14B has been described as an example. However, the present invention is not limited to this, and for example, three or more spherical surfaces having different radial dimensions may be provided in the ball portion.

  In the embodiment, the case where the projections 6A and 14D are provided on each of the ball portions 6 and 14 is illustrated. However, the present invention is not limited to this, and one protrusion or both protrusions may be omitted.

  In the embodiment, the case where the existing first mounting member 4 is attached to the cylinder 3 and the second mounting member 12 of the present invention is attached to the piston rod 2 is illustrated. However, the present invention is not limited to this, and the second mounting member 12 of the present invention may be attached to both the cylinder 3 and the piston rod 2.

  Furthermore, in the embodiment, the cylinder device 1 has been described by way of example in which the mounting members 4 and 12 are attached to the columns 19 and 20 in a state of being arranged to extend in the horizontal direction. However, the present invention is not limited to this, and may be configured to be attached to the structure in a state where the cylinder device 1 is disposed obliquely.

  Furthermore, in the embodiment, each mounting member 4, 12 is used for the cylinder device 1 forming a vibration control damper that generates a damping force by expanding and contracting the piston rod 2 together with the piston in the cylinder 3. The case where 1 is attached to each of the columns 19 and 20 has been described as an example. However, the present invention is not limited to this, and, for example, when a vibration control damper using a resin material having elasticity, a metal spring material or the like as a damping force generation source is attached to a structure such as a pillar. The attachment member may be used. In addition to this, the attachment member can be widely applied to the case where one member which is relatively displaced and the other member are rotatably connected.

Reference Signs List 1 cylinder device 2 piston rod 3 cylinder 12 second mounting member 13 inner member 14 ball portion 14A large diameter partial spherical surface 14B small diameter partial spherical surface 14C tapered connection surface (connection surface)
14E, 14F End 14G Small-diameter partial end face circle 16 Outer member 17 Bracket 17E Shaft side pressure receiving surface (inner circumferential surface)
18 Presser 18C Column side pressure receiving surface (inner circumferential surface)
19, 20 pillars (members)
O2 center point R2, R3 Radius dimension S3, S4 Projection area in the axis direction

Claims (4)

A cylinder device comprising a piston rod, a cylinder, and a mounting member provided on at least one of the piston rod or the cylinder.
In the mounting member, a large diameter partial spherical surface having the same central point but different diameters, a small diameter partial spherical surface smaller than the large diameter partial spherical surface, and an end of the large diameter partial spherical surface and an end of the small diameter partial sphere face each other An inner member having a connecting surface connected such that an end of the large diameter partial spherical surface and an end of the small diameter partial spherical surface are axially separated from each other, and an inner circumferential surface slidably contacting the large diameter partial spherical surface and the small diameter partial spherical surface A cylinder device comprising an outer member having the same.   The cylinder device according to claim 1, wherein a center point of a small diameter portion end face circle forming an end of the small diameter portion spherical surface coincides with the center point.   The inner member is attached to one of the piston rod or the cylinder, and the outer member is attachable to a member to which the cylinder is attached. Cylinder device.   The outer member has an axial pressure receiving surface on which the large diameter partial spherical surface abuts, and a column pressure receiving surface on which the small diameter partial spherical surface abuts, and the projected area of the column pressure receiving surface is a projection of the axial pressure receiving surface 4. The cylinder device according to claim 3, wherein the area is about the same as the area.

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