JP2008190544A - Damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily align in mounting a damper device, and easily conduct mounting operation. <P>SOLUTION: The damper device is conveyed to a construction site in a temporary fastened state where a pressure is not applied on a ball joint 80. Because a ball pressing member 100 and a ball receiving member 110 can be relatively rotated with respect to a ball stud 86 of the ball join 80 in mounting the damper device, a bolt insertion hole 109 of the ball pressing member 100 and a bolt insertion hole 118 of the ball receiving member 110 are easily aligned in a bolt insertion hole of a mounting part 92. Then, a ball part 82 is fixed between a holding part 104 and a receiving part 112 when a pressure to the ball part 82 is increased by the receiving part 112 by fastening power of a second fastening bolt 130 and a nut 140. Therefore, the ball join 80 is simultaneously fixed in fully fastening by using the second fastening bolt 130 and nut 140 with respect to the mounting part 92. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a damper device, and more particularly, to a damper device configured such that end portions of a piston rod and a cylinder rod are fixed to a mounting portion of a structure via a ball joint.

  For example, in a structure such as a building constructed by combining steel frames, development of a vibration suppression structure that absorbs a shake due to an earthquake by a damper device such as a hydraulic damper or a friction damper is underway. For example, a vibration damping structure in which a damper device composed of a hydraulic damper is arranged in a rectangular diagonal direction formed by connecting an upper beam to the upper end of a pair of columns and connecting a lower beam to the lower end of a pair of columns There is.

  When mounting the damper device in the frame of the steel frame in this way, when connecting the end of the piston rod and cylinder rod of the damper device to the mounting portion fixed on the steel frame side, the bolt is inserted into the bolt insertion hole of the mounting portion and the piston. The bolts are inserted by matching the bolt insertion holes at the ends of the rod and the cylinder rod. Ball joints are attached to the end portions of the piston rod and the cylinder rod so that the bolt insertion holes can be aligned at that time (see, for example, Patent Document 1).

  The ball joint is composed of a metal stud ball and a spherical receiving portion having a radius of curvature corresponding to the outer peripheral surface of the stud ball, and the outer peripheral surface of the stud ball rotates along the spherical surface of the receiving portion. By doing so, the relative angle adjustment between the fixed-side mounting portion and the damper device can be performed.

  On the other hand, in a damper device such as a hydraulic damper or a friction damper, it is desirable that both end portions are fixed to the steel frame mounting portion without play. The reason is that when the structure is shaken by an earthquake, vibration is input to the damper device without loss, so that the vibration energy is efficiently absorbed by the piston operation of the damper device. If there is play (play), the damping operation of the damper device will be delayed correspondingly, and the vibration damping effect of the structure will not be sufficiently obtained.

Therefore, in a factory that manufactures a damper device, a pressure is applied to the ball joint (force that presses the receiving portion against the outer peripheral surface of the stud ball) before shipment.
Japanese Patent Laid-Open No. 10-274271

However, when the damper device transported to the construction site of the structure is attached to the structure, the ball joints provided at both ends of the damper device are held in a state free from rattling by the applied pressure and cannot be rotated. , It is difficult to align the bolt insertion hole of the mounting part fixed to the steel frame and the bolt insertion hole of the ball joint flange, and it is quite difficult to fix the both ends of the damper device by inserting bolts into all the bolt insertion holes There was a problem of requiring labor and labor.
In addition, if the pressure applied to the ball joint is to be reduced and the mounting work is to be performed easily, an adjustment work is required to increase the pressure applied to the ball joint after alignment. It takes a lot of work and time to fix.

  SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a damper device that solves the above problems.

  In order to solve the above problems, the present invention has the following means.

  The present invention comprises two members that are relatively displaced in the axial direction, a damper main body that generates a force that resists the relative displacement, and a ball joint that is provided to fix the damper main body to a fixing portion of a structure. In the damper device, the ball joint temporarily tightens the ball portion of the ball joint so as to be rotatable between a ball pressing member that is held from one side and a receiving member that is held from the other side. A fastening means and a second fastening means for final fastening in a fixed state in which the ball pressing member and the receiving member apply pressure to the ball portion when the receiving member is fixed to the mounting portion. Thus, the above-mentioned problem is solved.

  In the present invention, the first fastening means is a temporary fastening bolt for temporarily fastening the receiving member and the ball pressing member, and the second fastening means is the ball pressing member, the receiving member, and the The above-described problem is solved by the bolt for final fastening for fastening the attachment portion.

  In the present invention, the ball joint has a minute gap formed between the ball pressing member and the receiving member after the temporary fastening, and the gap is made zero after the final fastening, The above-described problems are solved by fastening the receiving member to the contact state.

  According to the present invention, when the damper device is fixed to the attachment portion of the structure, the ball pressing member that holds the ball portion of the ball joint from one side and the receiving member that holds the ball portion of the ball joint from the other side. Since the bolt joint is temporarily tightened so that it can be rotated between the bolt joints, the ball joint side and the structure side can be aligned by the pivoting movement of the ball joint. And it can be installed easily by correcting the displacement of the damper device. And when fixing the edge part of a damper apparatus to the attaching part of a structure, when fixing a receiving member to an attaching part, the fixed state which a ball pressing member and a receiving member give pressurization to the ball part of a ball joint Therefore, after the mounting operation is completed, it is possible to directly absorb the shaking of the structure and enhance the vibration damping effect.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing an embodiment of a damper device according to the present invention. As shown in FIG. 1, the damper device 10 is a building damper device that uses a hydraulic damper to control the vibration of a structure such as a building, and is attached in a state where both ends are fixed to the structure. The damper device 10 includes a cylinder 20, a piston 30, a cylinder rod 40 extending to one side (left side in FIG. 1) from the end of the cylinder 20, and the other (right side in FIG. 1) from the end of the piston 30. And a cylindrical member 60 coupled to the piston rod 50.

  The cylinder 20 has a cylinder chamber 22 filled with hydraulic oil therein, and the piston 30 has a damping force generator 32 through which the hydraulic oil passes in the process of sliding in the cylinder chamber 22. The damping force generator 32 is configured to generate a damping force (a resisting force) when the hydraulic oil passes through the pressure regulating valve 34.

  Further, the piston 30 is provided with a volume compensation mechanism 70 on the side opposite to the piston rod 50. The volume compensation mechanism 70 includes a spare cylinder 72 that extends to the left in FIG. 1, a spare piston 74 that is housed in the spare cylinder 70, and a coil spring 76 that biases the spare piston 74. When the piston 30 reciprocates in the cylinder chamber 22, the hydraulic oil that cannot pass through the pressure regulating valve 32 out of the pressure increasing side (moving side) hydraulic oil flows into the spare cylinder 72 via the passage 78. Further, in the damper device 10, the ball joint 80 is assembled to the end portion of the base 40 and the end portion of the cylindrical member 60.

  The two members relatively displaced in the axial direction described in the claims of the present invention include the cylinder 20 and the piston rod 50, and these members constitute a damper main body. The ball joint 80 is connected to the damper main body via the base 40 and the cylindrical member 60.

  FIG. 2 is a view showing a mounting state of the damper device 10. As shown in FIG. 2, the ball joint 80 is attached to the steel frame 90 assembled in a lattice shape in a direction extending diagonally. A mounting portion 92 is provided at a diagonal corner of the steel frame 90, and the damper device 10 is mounted by fastening a ball joint 80 to the mounting portion 92. Therefore, when the vibration of the structure is transmitted through the mounting portion 92 and the ball joint 80, the damper device 10 absorbs vibration by generating a damping force by the piston 30 sliding on the cylinder chamber 22. Therefore, if there is play (play) at the ball joint 80, transmission of the vibration of the structure is delayed, and the damping effect by the damping operation of the damper device 10 is reduced.

  Here, the configuration of the ball joint 80 will be described. FIG. 3 is a longitudinal sectional view showing the configuration of the ball joint 80. The ball joint 80 includes a ball stud 86 having a shaft 84 coupled to the ball portion 82, a ball pressing member 100 that holds the ball portion 82 from one side, and a ball receiving member 100 that holds the ball portion 82 from the other side. Have. The shaft 84 of the ball stud 86 is screwed into the end of the base 40 or the cylindrical member 60 and the end of the cylindrical member 60, and is fixed by tightening a nut 85.

The ball pressing member 100 includes an insertion hole 102 through which the shaft 84 of the ball stud 86 is inserted, a holding portion 104 in which a curved surface on one side of the ball portion 82 is in sliding contact, a storage chamber 106 for storing the ball portion 82, and a flange 108. It consists of and. Further, a fitting recess 105 for fitting the ball receiving member 110 is formed on the opening side of the storage chamber 106.
The ball receiving member 110 is opposed to the receiving portion 112 that is in sliding contact with the curved surface on the other side of the ball portion 82, the fitting convex portion 114 that is formed so as to surround the periphery of the receiving portion 112, and the flange 108 of the ball pressing member 100. And a flange 116 formed in such a manner. By fitting the fitting convex portion 114 into the fitting concave portion 105 of the ball pressing member 100, the fitting position of the receiving portion 112 is positioned.

FIG. 4 is a bottom view of the ball pressing member 100. As shown in FIG. 4, the flange 108 of the ball pressing member 100 has a screw hole 107 into which a first fastening bolt (first fastening means) 120 for temporary fastening is screwed and a first fastening bolt for final fastening. And a bolt insertion hole 109 through which a second fastening bolt 130 (second fastening means: indicated by a broken line in FIG. 3) is inserted. In addition, the screw holes 107 are provided at four positions at intervals of 90 degrees in the circumferential direction. Further, the bolt insertion holes 109 are formed on the outer side in the radial direction from the screw holes 107, and are provided in at least eight places. Further, since the second fastening bolt 130 is thicker than the first fastening bolt 120, the second fastening bolt 130 is formed so that the tightening torque is larger than that of the first fastening bolt 120.
FIG. 5 is a bottom view of the ball receiving member 110. As shown in FIG. 5, the ball receiving member 110 has a bolt insertion hole 117 through which the first fastening bolt 120 for temporary fastening is inserted and a bolt insertion through which the second fastening bolt 130 for final fastening is inserted. A hole 118 is provided in the flange 116. The bolt insertion hole 117 is provided at a position facing the screw hole 107 of the ball pressing member 100. Further, the bolt insertion hole 118 is provided at a position facing the bolt insertion hole 109 of the ball pressing member 100.

When the first fastening bolt 120 is inserted into the bolt insertion hole 117 and screwed into the screw hole 107, the head of the first fastening bolt 120 comes into contact with the stepped portion of the bolt insertion hole 117 and the ball holding member 100. The ball receiving member 110 is fastened in a temporarily tightened state. In this temporarily tightened state, for example, a minute gap S (see FIG. 3) of about 0.1 mm is interposed between the flanges 108 and 116, and the ball stud 86 of the ball joint 80 is connected to the ball pressing member 100 and the ball holder. This is a state in which the member 110 is held in a rotatable state. Therefore, in the temporarily tightened state in which the ball pressing member 100 and the ball receiving member 110 are coupled only by the first fastening bolt 120, the ball joint 80 is attached to the mounting portion 92 of the steel frame 90 when the damper device 10 is mounted. Positioning can be performed easily.
Further, since the holding portion 104 of the ball pressing member 100 and the receiving portion 112 of the ball receiving member 110 have curved surfaces with a radius of curvature corresponding to the outer periphery of the ball portion 82, the first fastening bolt 120 is screwed into the screw hole 107. By tightening and tightening, the ball part 82 can be held in a state free from rattling.

  The holding force for the ball portion 82 is determined by the fastening force (tightening torque) of the fastening bolts 120 and 130 that sandwich the flanges 108 and 116 integral with the holding portion 104 of the ball pressing member 100 and the receiving portion 112 of the ball receiving member 110. Determined. When the holding force with respect to the ball portion 82 by the holding portion 104 of the ball pressing member 100 and the receiving portion 112 of the ball receiving member 110 is small (temporarily tightened state), the ball portion 82 rotates to adjust the mounting angle of the ball stud 86. It becomes possible to adjust, and when the holding force with respect to the ball part 82 is increased (finally tightened state), the ball part 82 can be fixed in a non-rotatable state.

  Accordingly, the damper device 10 assembled at the factory is transported to the building site in a temporarily tightened state in which no pressure is applied to the ball joint 80 as shown in FIG. Therefore, when the damper device 10 is fixed to the attachment portion 92 of the steel frame 90, the ball pressing member 100 and the ball receiving member 110 can be relatively rotated with respect to the ball stud 86 of the ball joint 80. Positioning can be easily performed so that the bolt insertion hole 109 of the holding member 100 and the bolt insertion hole 118 of the ball receiving member 110 are matched with the bolt insertion hole of the mounting portion 92.

  FIG. 6 is a longitudinal sectional view showing a state in which the ball joint 80 is fixed to the attachment portion 92 of the steel frame 90. As shown in FIG. 6, the bolt insertion hole 109 of the ball pressing member 100 and the bolt insertion hole 118 of the ball receiving member 110 are matched with the bolt insertion hole 96 of the mounting portion 92 so that the fastening bolt 130 for final fastening is inserted through the bolt. The holes 109, 118, and 96 are inserted. Then, the nut 140 is screwed onto the tip of the fastening bolt 130 protruding from the back surface of the mounting portion 92, and the nut 140 is tightened.

Thereby, the minute gap S between the flanges 108 and 116 becomes zero, and the flanges 108 and 116 come into contact with each other and are held in a state without backlash. At the same time, the step portion of the bolt insertion hole 117 is separated from the head portion of the first fastening bolt 120 and a gap S is formed between the step portion of the bolt insertion hole 117 and the head portion of the first fastening bolt 120. The
In this fastening state, the fastening force by the second fastening bolt 130 and the nut 140 is stronger than that of the first fastening bolt 120 for temporary fastening, so the pressure applied to the ball part 82 by the receiving part 112 increases and the ball part 82 Can be fixed between the holding portion 104 of the ball pressing member 100 and the receiving portion 112 of the ball receiving member 110. Therefore, the damper device 10 is attached in a state where the ball joint 80 is also fixed at the same time when the second fastening bolt 130 and the nut 140 are used for final fastening to the attachment portion 92 of the steel frame 90. That is, the worker can increase the pressure applied to the ball portion 82 by performing the same work as the conventional mounting work, and can fix the ball joint 80 in a state free from play (play).

  Thereby, since the rigidity in the ball joint 80 is reinforced, the ball joint 80 does not rattle even when a relatively large earthquake occurs. Therefore, the damper device 10 can absorb the vibration caused by the earthquake and can control the structure.

  Therefore, the damper device 10 is configured such that, for example, at the construction site, the flanges 108 and 116 of the ball joint 80 are fastened to the mounting portion 92 of the steel frame 90 by the second fastening bolts 130 and nuts 140 so It is directly transmitted to the cylinder 20 and the piston 30 through the joint 80, and is converted into a damping force by a relative operation (attenuation operation) between the cylinder 20 and the piston 30 to absorb the shaking of the structure.

  FIG. 7 is a longitudinal sectional view showing a modification. As shown in FIG. 7, in the modification, the fitting recess 105 of the ball pressing member 100 is formed in a tapered shape. Further, the fitting convex portion 114 of the ball receiving member 110 is also formed in a tapered shape having the same gradient as the fitting concave portion 105. That is, since the fitting concave portion 105 and the fitting convex portion 114 are each tapered in the insertion direction, the fitting convex portion 114 bites into the fitting concave portion 105 by the fastening force of the fastening bolt 130 and the nut 140. It is attached as follows.

  For this reason, the ball joint 80 is fixed to the mounting portion 92, and the fitting convex portion 114 of the ball receiving member 110 is subjected to a pressing force directed inward by the fitting with the fitting concave portion 105, so Deform to reduce the radius of curvature. Thereby, since the receiving part 112 can increase the pressurization with respect to the ball part 82 more, it becomes possible to fix the ball joint 80 in a non-rotatable state, and to strengthen the rigidity of the ball joint 80 more. be able to.

  In the modified example, since the rigidity of the ball joint 80 is further strengthened by using the taper of the fitting concave portion 105 and the fitting convex portion 114 as described above, the damper device 10 can reliably ensure even when the vibration due to the earthquake is large. The structure can be damped by absorbing the vibration.

  In the present embodiment, the first fastening bolt 120 for temporary fastening has been described as being inserted from the bottom surface (right side of the drawing) of the ball receiving member 100, but the damper main body side (illustrated in the drawing) of the ball pressing member 100. A configuration inserted from the left side) is also possible.

  In the above-described embodiment, the double rod type steel frame damper device has been described as an example. However, the present invention is not limited to this. For example, the present invention can also be applied to a damper device in which a rod extends only from one side. Needless to say, the present invention can also be applied to a friction damper, an electromagnetic damper using electromagnetic force, a hydraulic damper, a friction damper, and an electromagnetic damper attached to a bridge, a highway, a large machine that generates vibration, and the like.

It is a longitudinal cross-sectional view which shows one Example of the damper apparatus by this invention. It is a figure which shows the attachment state of the damper apparatus. 4 is a longitudinal sectional view showing a configuration of a ball joint 80. FIG. 4 is a bottom view of the ball pressing member 100. FIG. 4 is a bottom view of a ball receiving member 110. FIG. 3 is a longitudinal sectional view showing a state in which a ball joint 80 is fixed to an attachment portion 92 of a steel frame 90. FIG. It is a longitudinal cross-sectional view which shows a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Damper apparatus 20 Cylinder 30 Piston 32 Damping force generation | occurrence | production part 40 Cylinder rod 50 Piston rod 70 Volume compensation mechanism 80 Ball joint 90 Steel frame 92 Mounting part 82 Ball part 100 Ball pressing member 104 Holding part 105 Fitting recessed part 107 Screw hole 108,116 Flange 109, 117 Bolt insertion hole 110 Ball receiving member 112 Receiving portion 114 Fitting convex portion 120 First fastening bolt 130 Second fastening bolt 140 Nut

Claims (3)

In a damper device composed of two members that are relatively displaced in the axial direction, a damper main body that generates a force that resists the relative displacement, and a ball joint that is provided to fix the damper main body to a fixing portion of a structure.
The ball joint includes a first fastening means for temporarily fastening the ball portion of the ball joint in a rotatable state between a ball pressing member that is held from one side and a receiving member that is held from the other side; When the receiving member is fixed to the mounting portion, the ball pressing member and the receiving member have second fastening means for final fastening in a fixed state in which a pressure is applied to the ball portion. Damper device. The first fastening means is a temporary fastening bolt for temporarily fastening the receiving member and the ball pressing member;
2. The damper device according to claim 1, wherein the second fastening means is a final fastening bolt that fastens the ball pressing member, the receiving member, and the mounting portion. The ball joint is
After the temporary fastening, a minute gap is formed between the ball pressing member and the receiving member, and after the final fastening, the gap is made zero, so that the ball pressing member and the receiving member are in contact with each other. The damper device according to claim 1, wherein the damper device is fastened.

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