JP3545669B2 - Architectural shock absorber and manufacturing method thereof - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to, for example, a construction for a part of a structure of a building for attenuating an external force for deforming the structure applied at the time of an earthquake or the like or for interrupting the transmission of such an external force. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for a building, which is attached between structures of objects, and a method for manufacturing the same.
[0002]
[Prior art]
Conventionally, for example, in order to attenuate an external force applied to a building at the time of an earthquake or the like to deform the structure, for example, as shown in FIGS. A damping structure 10 having a shock absorber is mounted. That is, FIG. 5 is a view showing the structure of the building 1. The building 1 is provided with a V-shaped brace 7 in addition to the columns 3 and the beams 5.
[0003]
A vibration control structure 10 is provided between the lower end of the brace 7 and the beam 5 (or the floor 8). That is, as shown in FIG. 6, a fixed block 12 fixed integrally with the beam 5 is provided on both ends of the beam 5, and the fixed block 12 and the lower end 7 a of the V-shaped brace 7 are provided. The hydraulic vibration damper 14 is provided between them.
[0004]
As shown in FIG. 7, the hydraulic damper 14 has a cylinder 16 connected to a pin connection at one end (left end in the drawing) and a piston 18 connected to a pin connection at the other end (right end in the drawing). Are connected to each other, and have oil chambers 20, 21 which are divided by a piston 18 and filled with hydraulic oil inside the cylinder 16. The oil chamber 20 and the oil chamber 21 communicate with each other via an oil passage 23a provided with a throttle portion 19 in the middle of the valve unit 23.
[0005]
Such a hydraulic vibration damper 14 is used when the structure of the building 1 is deformed such that the lower end 7a of the brace 7 and the fixed block 12 approach each other due to an external force such as an earthquake applied to the building 1. The vibration damper 14 performs a contracting operation. That is, the piston 18 relatively moves so as to approach the abutting surface (the left side surface in FIG. 7) of the oil chamber 21 of the cylinder 16, and the hydraulic oil in the oil chamber 21 is compressed in the valve unit 23 by the throttle 19. It moves into the oil chamber 20 through the provided oil passage 23a.
[0006]
At this time, the hydraulic oil moves through the oil passage 23a of the valve unit 23 provided with the throttle portion 19 having a reduced cross-sectional area, so that the movement of the hydraulic oil receives resistance. As a result, the relative moving speed of the cylinder 16 and the piston 18, that is, the approach speed between the lower end 7 a of the brace 7 and the fixed block 12 is suppressed to be low, and the abrupt movement between the lower end 7 a of the brace 7 and the fixed block 12 due to external force. Approaching movement can be attenuated.
[0007]
When the structure of the building 1 is deformed so that the lower end 7a of the brace 7 and the fixed block 12 are separated from each other, the hydraulic vibration damper 14 performs an extension operation opposite to the contraction operation. That is, the hydraulic vibration damper 14 performs an extension operation such that the piston 18 relatively moves so as to approach the end surface (the right side surface in FIG. 7) of the oil chamber 20 of the cylinder 16. As a result, the separation speed between the lower end 7a of the brace 7 and the fixed block 12 can be kept low, and the rapid separation movement between the lower end 7a of the brace 7 and the fixed block 12 due to external force can be attenuated.
[0008]
The cylinder 16 of such a hydraulic vibration damper 14 has a cylindrical cylinder body 16a as shown in FIGS. 8 and 9, and this cylinder body 16a is formed by casting. As shown in FIG. 8, on the outer periphery of the cylinder body 16a, a seat portion 25 having a flat portion 25a for mounting the valve unit 23 having the throttle portion 19 is formed integrally with the cylinder body 16a by casting. .
[0009]
The seat portion 25 has two holes 27, 28 (communication passages) formed through the cylinder body 16a. The two holes 27, 28 are respectively separated from the left and right oil chambers in FIG. And both ends of the oil passage 23a of the valve unit 23.
[0010]
The two holes 27 and 28 are provided such that their axes are inclined with respect to a line perpendicular to the axis of the cylinder body 16a. For this reason, by changing the inclination angle of the axis of the two holes 27 and 28 or changing the height and length of the seat 25, another hydraulic vibration damper having a different size according to the specification in which the stroke of the piston 18 is different. The same valve unit 23 can be shared with the fourteen cylinder bodies 16a without using intermediate components such as a manifold.
[0011]
[Problems to be solved by the invention]
However, since the cylinder body 16a of such a conventional hydraulic damper 14 is formed by casting, it is necessary to manufacture the mold and to mold the mold into molding sand. There is a problem that the cost of the damper 14 increases.
[0012]
In addition, in order to share the same valve unit 23 between the cylinder bodies 16a of different sizes of the hydraulic vibration dampers 14 of different specifications, it is necessary to adjust the height and length of the seat 25 of the cylinder body 16a. It is necessary to change the size. For each such size difference, it is necessary to manufacture a mold for the casting of the cylinder body 16a and to insert the mold into the casting sand. There is a problem that such a cost is significantly increased.
[0013]
In order to solve such a problem, a cylinder body 66 as shown in FIGS. This is achieved by bringing the seat member 50 having the flat portion 50a for mounting the valve unit 23 into contact with the outer peripheral surface of the cylinder body 66 using an inexpensive steel pipe, It is welded to the surface by welding.
[0014]
The seat member 50 is provided with two coaxial holes 56 and 57 (communication passages) through the thick portion of the cylinder body 66, and the two holes 56 and 57 are separated by the piston 18. Each of the left and right oil chambers 21 and 20 in 7 communicates with both ends of an oil passage 23a of the valve unit 23. By manufacturing the cylinder body 66 having the seat member 50 without using a casting as described above, the cost can be reduced as compared with the conventional casting cylinder 16.
[0015]
When the size of the cylinder body 66 of the hydraulic vibration damper changes according to different specifications, the cylinder body 66 in which another seat member 50 having a different height or length is welded to the same cylinder body 66 is replaced. With only this, it becomes possible to share the same valve unit 23 between hydraulic dampers of different specifications. For this reason, it is not necessary to remodel and manufacture a different cylinder 16 for each hydraulic vibration damper having a different specification as in the case of using a conventional casting. Cost can be reduced.
[0016]
However, in the cylinder 66 provided with such a seat member 50, since the peripheral portion of the seat member 50 is merely welded to the outer peripheral surface of the cylinder body 66 by welding, the inner peripheral surface of the seat member 50 and the cylinder body It is not possible to completely remove the mechanical gap between the outer peripheral surface 66 and the outer peripheral surface 66. Therefore, the two holes 56 and 57 communicate directly with each other through the gap, and the control of the movement amount of the hydraulic oil between the two oil chambers by the throttle portion 19 of the valve unit 23 cannot be performed normally. Problems arise.
[0017]
In view of the above problems, the present invention can form the cylinder body at a lower cost as compared with the case where the cylinder body is formed by casting, and normally controls the movement amount of the hydraulic oil between the two oil chambers by the valve unit. It is an object of the present invention to provide a shock absorber for a building and a method for manufacturing the shock absorber, which can be carried out at a time.
[0018]
[Means for Solving the Problems]
In order to solve the above problems, a shock absorber for buildings of the present invention is:
Filling the through holes provided in advance in the valve unit mounting seat member, which is mounted in contact with the outer peripheral surface of the cylinder body, with the weld metal without gaps,
A configuration in which the welded metal portion and the thick portion of the cylinder body are penetrated coaxially to form a communication path that communicates both ends of the oil passage of the valve unit with each of the two oil chambers in the cylinder body. It is what it was.
[0019]
According to the shock absorber for buildings having such a configuration, a cylinder body having a seat member for mounting the valve unit can be formed without using a casting, so that compared with a case where the cylinder body is formed by casting, The cost of the building shock absorber can be significantly reduced.
[0020]
In addition, since the welded metal portion and the thick portion of the cylinder body are penetrated coaxially to form a communication passage connecting both ends of the oil passage of the valve unit and each of the two oil chambers in the cylinder body, the communication passage is formed. Since direct communication can be prevented, the amount of movement of hydraulic oil between the two oil chambers by the valve unit can be controlled normally.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
FIGS. 1 and 2 are diagrams referred to for describing a first embodiment of a building shock absorber and a method of manufacturing the same according to the present invention.
[0022]
1 and 2 are views showing a cylinder body 26a of a cylinder 26 of a hydraulic vibration damper (building shock absorber). The cylinder 26a is formed of a steel pipe, and the outer periphery of the cylinder 26a is welded to the periphery of a seat member 30 having a flat portion 30a for mounting the valve unit 23 having the throttle portion 19 thereon. Thus, the seat member 30 is provided in a state of being in contact with the outer peripheral surface of the cylinder body 26a. The seat member 30 is provided with two holes 32, 32 in advance.
[0023]
After the seat member 30 is provided on the outer peripheral surface of the cylinder body 26a, the holes 32, 32 are formed by a weld metal 34 formed by melting a welding rod on the outer peripheral surface of the cylinder body 26a in the holes 32, 32. Filled without gaps. Unnecessary portions of the weld metal 34 rising from the holes 32, 32 above the plane portion 30a are removed by cutting or grinding so as to be flush with the plane portion 30a.
[0024]
Two holes communicating both ends of the oil passage 23a of the valve unit 23 and each of the oil chambers inside the cylinder 26a coaxially from the weld metal 34 in the holes 32, 32 to the thick portion of the cylinder 26a. 36 and 37 (communication passages) are formed by drilling. The two holes 36 and 37 constitute a part of an oil passage that communicates between the two left and right oil chambers 20 and 21 in FIG. 1 separated by the piston 18 via the oil passage 23 a of the valve unit 23. .
[0025]
According to such a first embodiment of the present invention, a cylinder 26a having a seat member 30 provided on the outer peripheral surface thereof is formed by welding using a steel pipe that is less expensive than a casting for the cylinder 26a. Therefore, the cost of the hydraulic vibration damper can be reduced as compared with the case where the cylinder body is formed by casting.
[0026]
Then, the holes 32, 32 of the seat member 30 are filled with the weld metal 34 without any gap, and then the two holes 36, 37 are opened. Therefore, for example, between the inner peripheral surface of the seat member 30 and the outer peripheral surface of the cylinder body 26a. Even if there is a minute gap, the minute gap can be closed by the weld metal 34 to prevent oil from flowing directly between the holes 36 and 37. Therefore, the control of the movement amount of the hydraulic oil between the two oil chambers by the valve unit 23 can be performed normally.
[0027]
The two holes 36 and 37 are provided such that their axes are inclined with respect to a line orthogonal to the axis of the cylinder body 26a. For this reason, by changing the inclination angle of the axis of the two holes 36 and 37 or changing the height and length of the seat member 30, the stroke of the piston 18 is different from the cylinder body of the hydraulic vibration damper having a different stroke. Also, it is possible to share the same valve unit 23 without using an intermediate component such as a manifold.
[0028]
Further, when the cylinder body is formed by casting as in the prior art, the valve unit must be re-cast using another mold in order to change the height and length of the seat for the valve unit 23. In order to use the same 23, it is necessary to recast using a different mold every time the specifications of the hydraulic damper are different. For this reason, conventionally, the cost of the hydraulic vibration damper is extremely high. However, according to the first embodiment, only the size of the seat member 30 needs to be changed, so that the cost of the hydraulic vibration damper is significantly reduced. be able to.
[0029]
On the other hand, since the seat member 30 has two holes 32, 32 in one part having a relatively large area, the positions of the two holes 32, 32, that is, the holes 36, 37 are formed. There is also an advantage that the degree of freedom of the position can be increased.
[0030]
In the first embodiment, the seat member 30 is provided on the outer peripheral surface of the cylinder body 26a by welding the periphery thereof. However, the seat member 30 may be provided by another means such as screwing. 26a may be provided on the outer peripheral surface.
[0031]
FIG. 3 and FIG. 4 are diagrams referred to for describing a second embodiment of the present invention.
In the first embodiment, the seat member 30 is provided on the outer peripheral surface of the cylinder body 26a by welding. On the other hand, in the second embodiment, the cylinder 46 of the hydraulic vibration damper is provided. A large hole 40 is made in a thick portion of the cylinder body 46a, and a seat member 42 for mounting a valve unit is mechanically fitted into the hole 40, and the flange portion 42a is welded on the outer peripheral surface of the cylinder body 46a. It is different in that it is provided as such.
[0032]
Then, two holes 44 and 45 (communication passages) communicating both ends of the oil passage 23a of the valve unit 23 and each of the oil chambers inside the cylinder body 46a are formed by drilling. The two holes 44 and 45 constitute a part of an oil passage that communicates between the two left and right oil chambers 20 and 21 in FIG. 3 separated by the piston 18 via the oil passage 23a of the valve unit 23.
[0033]
According to the second embodiment of the present invention, the same effects as those of the first embodiment can be obtained.
In the second embodiment, one large hole 40 is formed in the cylinder body 46a, and one large seat member 42 is provided in the large hole 40 by mechanical fitting. In contrast to this, two holes 44 and 45 are formed in the cylinder body 46a, and two holes smaller than the hole 40 are formed in the cylinder body 46a, and a seat member smaller than the seat member 42 is provided in each of the two holes. The two seat members may be provided with holes that form an oil passage, such as the holes 44 and 45, one by one.
[0034]
In the first and second embodiments, the holes 36 and 37 and the holes 44 and 45 have axes inclined with respect to axes perpendicular to the axes of the cylinder bodies 26a and 46a. However, the holes 36 and 37 and the holes 44 and 45 may have an axis coinciding with an axis orthogonal to the axis of the cylinder body 26a and the cylinder body 46a.
[0035]
Further, in the above-described embodiment, the hydraulic damper for damping the vibration applied from the outside has been described. However, the present invention is not limited to the hydraulic damper, and for example, the transmission of the vibration applied from the outside may be performed. The present invention can be applied to any other type of building shock absorber, such as a shut-off hydraulic anti-vibration damper.
[0036]
As described above, the embodiments of the present invention have been specifically described. However, the present invention is not limited to the above embodiments, and various other changes may be made based on the technical idea of the present invention. It is possible.
[0037]
【The invention's effect】
As described above, according to the present invention, a cylinder having a seat member for mounting a valve unit can be formed without using a casting. The cost of the shock absorber can be significantly reduced.
[0038]
In addition, since the welded metal portion and the thick portion of the cylinder body are penetrated coaxially to form a communication passage connecting both ends of the oil passage of the valve unit and each of the two oil chambers in the cylinder body, the communication passage is formed. Since direct communication can be prevented, the amount of movement of hydraulic oil between the two oil chambers by the valve unit can be controlled normally.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a cylinder body 26a and a seat member 30 of a cylinder 26 of a hydraulic damper according to a first embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA of the cylinder body 26a in FIG.
FIG. 3 is a side sectional view showing a cylinder body 46a and a seat member 42 of a cylinder 46 of a hydraulic damper according to a second embodiment of the present invention.
FIG. 4 is a sectional view taken along line AA of the cylinder body 46a in FIG.
FIG. 5 is a conceptual diagram showing a structure of a building 1 using a vibration control structure 10.
6 is an enlarged detailed view of a vibration control structure 10 on each floor of the building 1 in FIG.
7 is an enlarged sectional view of a conventional hydraulic damper 14 used for the damping structure 10 in FIG.
8 is a side sectional view showing a cylinder body 16a of the cylinder 16 in FIG.
9 is a cross-sectional view of the cylinder body 16a in FIG. 8 taken along line AA.
FIG. 10 is a side sectional view showing another conventional cylinder body 66.
11 is a sectional view taken along line AA of the cylinder body 66 in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Building 3 Column 5 Beam 7 Brace 7a Lower end 8 Floor 10 Vibration control structure 12 Fixed block 14 Hydraulic vibration damper 16 Cylinder 16a Cylinder body 18 Piston 19 Throttle part 20, 21 Oil chamber 23 Valve unit 23a Oil passage 25 Seat part 25a flat portion 26 cylinder 26a cylinder body 27, 28 hole 30 seat member 30a flat portion 32 hole 34 weld metal 36, 37 hole 40 large hole 42 seat member 42a flange portion 44, 45 hole 46 cylinder 46a cylinder body 50 seat member 50a flat surface Part 56, 57 hole 66 cylinder body

Claims (2)

Filling the through holes provided in advance in the valve unit mounting seat member, which is mounted in contact with the outer peripheral surface of the cylinder body, with the weld metal without gaps,
By penetrating the welded metal part and the thick part of the cylinder body coaxially,
A damping device for a building, wherein a communication passage communicating between both ends of an oil passage of the valve unit and each of two oil chambers in the cylinder is formed. A seat member for mounting a valve unit having a through hole is mounted in contact with the outer peripheral surface of the cylinder body,
After filling the through hole with the weld metal without gaps,
By penetrating the welded metal part and the thick part of the cylinder body coaxially,
A method of manufacturing a shock absorber for a building, comprising forming a communication passage connecting both ends of an oil passage of the valve unit and each of two oil chambers in the cylinder.

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