JP2012102786A - Vibration control hydraulic damper - Google Patents

Abstract

The present invention provides a hydraulic damper for vibration control capable of realizing the downsizing.
A joint member 52 is provided which is formed in a substantially cylindrical shape and is provided with spherical surfaces 52a and 52b at both axial ends thereof.
[Effect] It is possible to reduce the size of the hydraulic damper for vibration control.
[Selection] Figure 1

Description

  The present invention relates to a seismic control hydraulic damper that is provided in a building structure and attenuates shaking of the building structure due to an earthquake or the like.

  As a conventional hydraulic damper for vibration control, as shown in FIG. 15, a ball joint 18 a is connected to the tip of an extension member 15 connected to the left end of the cylinder tube 14 in the figure, There was a first conventional vibration damping damper 10 for vibration control in which a ball joint 18b was connected to the tip of a piston rod 16 protruding from the right end in the figure (see FIG. 20 of Patent Document 1).

  The first conventional hydraulic damper for vibration control 10 is provided in a building structure in a state as shown in FIG. 16, for example. That is, two beams 4 and 5 (building structure) at two vertical positions between two pillars 1 and 2 (building structure) standing next to each other in the horizontal direction and standing vertically. Is provided in the horizontal direction, and a lower column 7 (building structure) is provided on the lower surface of the beam 4 positioned at the upper level, and the upper column of the beam 5 positioned at the lower level is provided on the upper surface of the beam 5. 8 (building structure) was provided (see FIG. 19 of Patent Document 1).

  The first conventional hydraulic damper for vibration control 10 has a ball joint 18 a connected to a bracket 11 provided so as to hang down from the left end of the lower surface of the intermediate column 7, and the ball joint 18 b is connected to the intermediate column 8. It was connected to the bracket 12 provided so as to rise from the upper right end portion.

  The first conventional hydraulic damper for vibration control 10 can attenuate the shaking of the building structure due to an earthquake or the like by moving the piston rod 16 in the axial direction by an external force such as an earthquake. It was.

  However, the first conventional hydraulic damper 10 for vibration control needs to have a large length of the extension member 15 in order to ensure the range in which the piston rod 16 operates, and accordingly, the damping is controlled. There existed a problem that the length dimension of the seismic hydraulic damper 10 will become large.

  Furthermore, the first conventional damping hydraulic damper 10 has a configuration in which the ball joints 18a and 18b are connected to both ends thereof, which also increases the length of the damping hydraulic damper 10. There was a problem that.

  And if the length direction of the hydraulic damper 10 for vibration control becomes large, there existed a problem that the width | variety of the pillars 7 and 8 which connect it also became large in connection with this.

  Further, if the length direction of the damping hydraulic damper 10 becomes large, the damping hydraulic damper 10 cannot be attached in the case where there is a limitation on the width of the intermediate columns 7 and 8 on which the damping damper 10 is provided. There was also a problem.

  On the other hand, as another conventional hydraulic damper for vibration control, as shown in FIG. 17, at the tip end portion (left end portion in the drawing) of the extension member 25 integrally connected to the left end portion in the drawing of the cylinder tube 24, A coupling structure 30 is provided, and a second conventional hydraulic damper for vibration control 20 having a ball joint 18b coupled to the tip of a piston rod 26 protruding from the right end of the cylinder tube 24 in the drawing is provided. (See FIG. 14 of Patent Document 1).

  The connection structure 30 includes a convex spherical member 32 having a convex spherical surface portion 32 a fixed to the peripheral portion of the distal end portion of the extension member 25, and a concave slidably contacting the convex spherical surface portion 32 a of the convex spherical member 32. It has a spherical surface portion 34a and is configured to include a concave spherical member 34 formed in a substantially annular shape.

  The convex spherical member 32 of the connection structure 30 has a convex spherical portion 32a on the outer periphery thereof, and the portion farthest from the axis is also a part of the convex spherical portion 32a. The convex spherical member 32 is formed by opening an axial hole penetrating in the axial direction.

  As shown in FIG. 17, the convex spherical member 32 of the connection structure 30 is fixed to the distal end portion of the extension member 25 by a female screw member 38, and the concave spherical member 34 of the connection structure 30 is bracketed by a male screw member 39. 21 was fixed to the circumferential recess 21a. The concave spherical member 34 of the connection structure 30 is configured to rotatably support the convex spherical member 32 of the connection structure 30.

  As shown in FIGS. 17 to 20, the connecting structure 30 is connected to the bracket 21 and the lower surface of the stud 27 (building structure) provided on the lower surface of the beam 4 via the flange portion 21 b at the upper end thereof. It was fixed to. On the other hand, as shown in FIG. 18, the ball joint 18 b is connected to the bracket 12 and is fixed to the upper surface of the stud 28 (building structure) provided on the upper surface of the beam 5 via the bracket 12.

  As shown in FIG. 18, the left end portion of the piston rod 26 of the second conventional damping hydraulic damper 20 in the drawing is the tip of the extension member 15 of the first conventional damping hydraulic damper 10. The ball joint 18a as provided in the part was not provided and was a free end.

  According to the second conventional damping hydraulic damper 20 as described above, the overall length can be made shorter than that of the first conventional damping hydraulic damper 10, so that downsizing is realized. I was able to do it.

Japanese Patent No. 4162642

  However, the second conventional hydraulic damper for vibration control 20 has a configuration in which the spherical member 32 is fixed to the outer peripheral portion of the extension member 25, and the axial center of the convex spherical portion 32 a of the spherical member 32. Therefore, there is a problem that the outer dimension in the direction perpendicular to the length direction of the vibration control hydraulic damper 20 is increased and the size thereof is increased.

  When the outer dimension in the direction perpendicular to the length direction of the damping hydraulic damper 20 is increased, a wall attached to the outer periphery of the intermediate pillars 27 and 28 connecting the damping hydraulic damper 20 is chambered. There is a problem that the indoor space is narrowed because it protrudes inward.

  In view of the above problems, an object of the present invention is to provide a seismic control hydraulic damper that can be downsized.

  In order to solve the above-mentioned problems, a hydraulic damper for vibration control according to the present invention is characterized by including a joint member formed in a substantially cylindrical shape and provided with spherical surfaces at both axial ends thereof. .

  In addition, a hydraulic damper for vibration control according to the present invention includes a receiving member having a spherical surface slidable with the spherical surface of the joint member.

  In addition, the hydraulic damper for vibration control according to the present invention is characterized in that it includes a support member that supports the receiving member and has a spherical surface that can slide with the spherical surface of the joint member. .

According to such a hydraulic damper for vibration control of the present invention, by including a joint member formed in a substantially cylindrical shape and provided with spherical surfaces at both axial ends thereof,
It is possible to reduce the size of the hydraulic damper for vibration control.

It is the side surface partial sectional view which shows the hydraulic damper 40 for damping | damping based on the 1st Embodiment of this invention. It is a figure which shows the state which attached the hydraulic damper 40 for vibration control in FIG. 1 to the building structure. FIG. 2 is a partially enlarged side cross-sectional view showing an enlarged connection structure 50 attached to the vibration damping hydraulic damper 40 in FIG. 1. It is a B arrow view of the connection structure 50 in FIG. It is the top view which shows the connection structure 50 in FIG. FIG. 4 is an enlarged side cross-sectional view showing an enlarged cylindrical member 52 in FIG. 3. It is C arrow line view of the cylindrical member 52 in FIG. FIG. 5 is a side sectional view showing the support member 54 in FIG. 3. It is a D arrow line view of the supporting member 54 in FIG. FIG. 5 is a side sectional view showing the receiving member 56 in FIG. 3. It is the E arrow directional view of the receiving member 56 in FIG. It is an expanded side sectional view which expands and shows the connection structure body of the hydraulic damper 60 for vibration control which concerns on the 2nd Embodiment of this invention. FIG. 13 is a side sectional view showing the support member 62 in FIG. 12. FIG. 13 is a side sectional view showing the receiving member 64 in FIG. 12. It is the side view which shows the 1st conventional hydraulic damper 10 for vibration control. It is a figure which shows the state which attached the damping hydraulic damper 10 in FIG. 15 to the building structure. It is the side sectional view showing the 2nd conventional hydraulic damper 20 for vibration control. It is a figure which shows the state which attached the damping hydraulic damper 20 in FIG. 17 to the building structure. It is A arrow directional view of the connection structure 30 in FIG. It is the top view which shows the bracket 21 in FIG.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the hydraulic damper for damping control which concerns on this invention is demonstrated concretely based on drawing.

FIG. 1 to FIG. 11 are diagrams which are referred to in order to explain a vibration control hydraulic damper 40 according to the first embodiment of the present invention.
The same parts as those of the conventional seismic damping hydraulic damper will be described with the same reference numerals, and redundant description of the same configuration as the conventional one will be omitted except for a part.

  As shown in FIG. 1, the hydraulic damper 40 for vibration control is provided with a connecting structure 50 at the distal end portion of an extension member 45 that is integrally connected to the left end portion of the cylinder tube 44 in the drawing, and the cylinder tube 44. A ball joint 48 is connected to the tip of the piston rod 46 protruding from the right end in FIG.

  As shown in FIG. 2, the connecting structure 50 is fixed to the lower surface of the stud 41 (building structure), and the ball joint 48 is fixed to the upper surface of the stud 42 (building structure) via the bracket 49. The seismic damping hydraulic damper 40 is disposed between the intermediate column 41 and the intermediate column 42.

  As shown in FIGS. 3 and 4, the connecting structure 50 includes a cylindrical member 52 (joint member) having convex spherical surfaces 52 a and 52 b (spherical surfaces), a support member 54, and a receiving member 56. Since these members share the axis with the piston rod 46, each member adjacent to the axis in a direction perpendicular to the axis has a concentric circular shape.

  As shown in FIG. 6, the cylindrical member 52 is formed in a substantially cylindrical shape having a lateral axis in the figure and having an outer peripheral surface 52 d with a constant radius from the axial line. A shaft hole 52c penetrating in the direction is formed. Convex spherical surfaces 52 a and 52 b are formed at both ends of the cylindrical member 52 in the axial direction.

  As shown in FIG. 6, the cylindrical member 52 has a female threaded portion 52e extending from the right end of the inner peripheral portion in the drawing to the central portion in the axial direction, and the innermost portion of the female threaded portion 52e and the shaft hole are formed. Between the end surface 52f of 52c, the groove part 52g dented from the thread of the female thread part 52e is formed.

  For this reason, as shown in FIG. 3, the cylindrical member 52 is screwed with a male screw portion 45a at the tip of the extension member 45 to the female screw portion 52e, so that the tip of the extension member 45 is fixed to the end surface 52f of the shaft hole 52c. In a state where the surfaces are in contact with each other, the distal end portion of the extension member 45 is integrally fixed.

  Further, as shown in FIG. 3, the shaft hole 52c of the cylindrical member 52 is formed to have a diameter that allows the piston rod 46 of the damping hydraulic damper 40 to be loosely inserted. No member is provided, and the free end is not connected to any member.

  For this reason, according to the hydraulic damper 40 for vibration control as described above, the first end of the piston rod 46 is a free end, and the tubular member 52 is provided at the front end of the extension member 25. In the conventional seismic damping hydraulic damper 10, there is no ball joint 18 a at the end opposite to the ball joint 18 b, so that the overall length can be shortened.

  As shown in FIGS. 8 and 9, the support member 54 is formed with a through hole 54 h penetrating in the axial direction (left and right direction in FIG. 8), and one end portion in the axial direction (in FIG. 8, An annular receiving portion 54b that protrudes inward toward the axis is formed on the inner peripheral portion in the vicinity of the right end portion).

  As shown in FIG. 8, on the left side of the receiving portion 54b of the support member 54, as shown in FIG. 3, a concave spherical surface 54a (spherical) that can contact the convex spherical surface 52a of the cylindrical member 52 without a gap. Surface) is formed.

  As shown in FIG. 8, the support member 54 has a female screw portion 54c formed on the inner peripheral portion located on the left side of the receiving portion 54b. Further, the support member 54 is formed with an L-shaped groove portion 54d having a L-shaped cross section in the right side of the concave spherical surface 54a of the receiving portion 54b, and as shown in FIG. 3, the L-shaped groove portion 54d. An annular O-ring 58 can be attached to the front.

  As shown in FIGS. 5 and 9, the support member 54 has a plurality of through holes 54f penetrating from the upper surface 54e in the vertical direction in FIG. 9, as shown in FIG. 5, and each of the through holes 54f is formed. Is formed with a circular counterbored hole 54g having a diameter larger than that of the through hole 54f in a cross section perpendicular to the axial direction of the through hole 54f, as is counterbored from the side opposite to the upper surface 54e with respect to the through hole 54h. ing.

  The head of the head bolt (not shown) comes into contact with the abutting surface 54j of the counterbore hole 54g of the support member 54, and the male screw portion of the head bolt (not shown) loosely passes through the through hole 54f of the support member 54. Thus, the support member 54 can be fixed to the stud 41 by screwing into a screw hole (not shown) formed on the lower surface of the stud 41.

  The receiving member 56 is formed in an annular shape as shown in FIGS. 10 and 11, and the inner peripheral portion thereof can contact the convex spherical surface 52b of the cylindrical member 52 without a gap as shown in FIG. A concave spherical surface 56a (spherical surface) is formed.

  As shown in FIG. 10, the receiving member 56 is formed with an L-shaped groove 56c having a L-shaped cross section on the left side of the concave spherical surface 56a. As shown in FIG. An annular O-ring 58 can be attached to the letter-shaped groove 56c.

  As shown in FIG. 10, the receiving member 56 has a male screw portion 56 b formed on the outer peripheral portion thereof, and the male screw portion 56 b is screwed to the female screw portion 54 c of the support member 54, as shown in FIG. 3. The cylindrical member 52 is sandwiched between the receiving portion 54 b of the support member 54 and the receiving member 56 and is fixed inside the support member 54.

  At this time, the cylindrical member 52 has its convex spherical surface 52 a in contact with the concave spherical surface 54 a of the support member 54, and its convex spherical surface 52 b is in contact with the concave spherical surface 56 a of the receiving member 56. At the same time, a gap of 0.5 mm or more is formed between the outer peripheral surface 52d of the cylindrical member 52 and the thread of the female thread portion 54c of the support member 54.

  For this reason, the support member 54 slides between the concave spherical surface 54 a of the receiving portion 54 b and the convex spherical surface 52 a of the cylindrical member 52, and the convex spherical shape of the concave spherical surface 56 a of the receiving member 56 and the cylindrical member 52. It can rotate relative to the cylindrical member 52 through sliding with the surface 52b.

  Further, as shown in FIG. 3, between the L-shaped groove portion 54d of the support member 54 and the convex spherical surface 52a of the cylindrical member 52, and the L-shaped groove portion 56c of the receiving member 56 and the convex spherical surface of the cylindrical member 52. The gap formed between the outer peripheral surface 52d of the cylindrical member 52 and the female threaded portion 54c of the support member 54 by arranging the O-ring 58 in a state where the cross section thereof is compressed between each of the O-rings 58b. It is in a sealed state. The inside of the sealed gap is filled with a lubricant such as grease.

  In addition, the gap formed between the outer peripheral surface 52d of the cylindrical member 52 and the internal thread portion 54c of the support member 54 is controlled by an external force such as an earthquake due to the relative rotational angle between the cylindrical member 52 and the support member 54. When the seismic hydraulic damper 40 is operated, both end portions of the outer peripheral surface 52d of the cylindrical member 52 and both end portions of the female screw portion 54c of the support member 54 do not come into contact with each other even if the seismic hydraulic damper 40 is inclined by 5 degrees which is the maximum set angle. In order to achieve this, it is set to 0.5 mm or more.

  For this reason, the cylindrical member 52 in the hydraulic damper for vibration control 40 according to the present embodiment has a cylindrical shape in which a portion farthest from the axis is cut out in parallel with the axis, and the support member 54 and the cylinder Since no member is provided between the cylindrical member 52 and the second conventional vibration damping damper 20, the radial outer dimension thereof can be reduced. An increase in size can be prevented, and an increase in weight and cost associated with the increase in size can be prevented.

  As described above, according to the seismic control hydraulic damper 40 according to the present embodiment, it is possible to reduce the size thereof.

  Further, the damping hydraulic damper 40 according to the present embodiment can attach the damping hydraulic damper 40 to the building structure even if the installation space for the building structure is small.

  Further, since the damping hydraulic damper 40 according to the present embodiment requires only a small installation space in the length direction and the radial direction, the wall attached to the outer periphery of the studs 41 and 42 can be projected to the indoor side. The indoor space can be widely used.

  FIGS. 12 to 14 are views referred to for explaining a connection structure of the hydraulic damper 60 for vibration control according to the second embodiment of the present invention.

  As shown in FIG. 3, the receiving portion 54 b of the connection structure 50 in the hydraulic damper 40 for vibration control according to the first embodiment is integrally formed with the support member 54, whereas as shown in FIG. 12. In addition, the connection structure in the hydraulic damper for vibration control 60 according to the present embodiment is different in that the receiving member 64 is configured to be separated and independent from the support member 62.

  That is, as shown in FIG. 12, the receiving member 64 in the present embodiment is different from the receiving portion 54b in the first embodiment in that it can be attached to and detached from the support member 62 by screw fastening. .

  As shown in FIG. 13, the support member 62 in the present embodiment is a female screw that is screwed to the receiving member 56 in a portion where the receiving portion 54 b of the support member 54 in the first embodiment is formed. The portion 62a is also different from the support member 54 in the first embodiment in that it is formed to extend rightward in FIG.

  The receiving member 64 is formed in an annular shape as shown in FIG. 14, and a concave spherical shape that can contact the convex spherical surface 52a of the cylindrical member 52 without a gap as shown in FIG. A surface 64a (spherical surface) is formed.

  As shown in FIG. 14, the receiving member 64 is formed with an L-shaped groove 64c having a L-shaped cross-section recessed right next to the concave spherical surface 64a. As shown in FIG. An annular O-ring 58 can be attached to the groove 64c.

  A male screw portion 64b is formed at the left end portion in the axial direction in FIG. 14 on the outer peripheral portion of the receiving member 64, and a flange projecting radially outward from the thread of the male screw portion 64b in the radial direction at the right end portion in the axial direction. A portion 64d is formed, and an endless groove portion 64e recessed inward in the radial direction is formed at the central portion in the axial direction between them.

  Therefore, as shown in FIG. 14, the receiving member 64 has a male screw portion 64b that can be screw-fastened to a female screw portion 62a of the support member 62 shown in FIG. 13, and the left side of the flange portion 64d. The receiving member 64 is integrally fixed to the support member 62 in a state where the end face on the right side of the female screw portion 62a of the support member 62 is opposed to this surface.

  Also with the seismic damping hydraulic damper 60 according to the present embodiment, the same effect as that of the seismic damping hydraulic damper 40 according to the first embodiment can be obtained.

  In the seismic damping hydraulic damper 60 according to the present embodiment, the parts that need to be subjected to surface treatment such as plating including the convex spherical surface portion and the concave spherical surface portion are the cylindrical member 52 and the receiving members 56 and 64. Compared with the case where the cylindrical member 52, the support member 54, and the receiving member 56 in the first embodiment are plated, the surface area to be plated can be reduced, so that the cost for plating is low. Can be made.

  As shown in FIG. 2, in the damping hydraulic damper 40 according to the first embodiment, the cylindrical member 52 is provided at the distal end portion of the extension member 45 integrally connected to the cylinder tube 44. For example, when the extension member 45 is not provided, the cylindrical member 52 is attached to the tip of the cylinder tube 44 on the same side as the extension member 45 in the first embodiment. You may do it.

  Thereby, the length of the hydraulic damper 40 for vibration control can be further shortened by the length of the extension member 45.

  In addition, the cylindrical member 52, the support member 54, and the receiving member 56 in the first embodiment are not particularly illustrated or described, but for attaching a jig used for assembling them, A screw hole, a recess, or the like may be provided.

  Further, in the damping hydraulic damper 40 according to the first embodiment, the ball joint 48 is connected to the tip of the piston rod 46 protruding from the cylinder tube 44. In this way, the ball joint It is not necessary to limit to 48, and any other connecting means such as a clevis joint or a universal joint may be used.

1, 2 Columns 4, 5 Beams 7, 8 Spacer 10 Damping hydraulic damper 11, 12 Bracket 14 Cylinder tube 15 Extension member 16 Piston rod 18a, 18b Ball joint 20 Damping hydraulic damper 21 Bracket 21a Circumferential recess 21b Flange Portion 24 Cylinder tube 25 Extension member 26 Piston rod 27, 28 Spacer 30 Connection structure 32 Convex spherical surface member 32a Convex spherical surface portion 34 Concave spherical surface member 34a Concave spherical surface portion 38 Female thread member 39 Male thread member 40 Damping hydraulic damper 41, 42 Space column 44 Cylinder tube 45 Extension member 45a Male thread part 46 Piston rod 48 Ball joint 49 Bracket 50 Connection structure 52 Cylindrical member 52a, 52b Convex spherical surface 52c Shaft hole 52d Outer peripheral surface 52e Female thread part 52f End face 52g Counterbored hole 4 Support member 54a Concave spherical surface 54b Receiving part 54c Female thread part 54d L-shaped groove part 54e Upper surface 54f Through hole 54g Recessed part 54h Through hole 54j Abutting surface 56 Receiving member 56a Concave spherical surface 56b Male thread part 56c L-shaped groove part 58 O-ring 60 Damping Hydraulic damper 62 receiving member 62a female thread part 64 support member 64a concave spherical surface 64b male thread part 64c L-shaped groove part 64d flange part 64e groove part

Claims (3)

  A hydraulic damper for vibration control comprising a joint member formed in a substantially cylindrical shape and provided with spherical surfaces at both axial ends thereof.   The hydraulic damper for vibration control according to claim 1, further comprising a receiving member having a spherical surface slidable with a spherical surface of the joint member.   3. The hydraulic damper for vibration control according to claim 2, further comprising a support member that supports the receiving member and has a spherical surface that is slidable with the spherical surface of the joint member.

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