JP5694982B2 - Damper clamping device and damper mounting method using this device - Google Patents

Description

  The present invention relates to a damper tightening device for mounting a damper between a structure such as a bridge pier and a heavy object such as a bridge girder to absorb shocks, and a damper mounting method using this device.

A damper 12 is attached between a structure 11 such as a bridge pier and a heavy object 10 such as a bridge girder (Patent Document 1).
According to Patent Document 1, as shown in FIG. 8, when the heavy article 10 is attached on the structure 11 with the support shoe 14 interposed, between the structure 11 and the heavy article 10, In order to absorb shocks such as vibrations caused by vehicles and earthquakes, the damper 12 is attached with a bolt 15 between the bracket 13 on the structure 11 side and the heavy object 10.
The damper 12 is attached not only in the vertical direction but also in an appropriate direction according to the purpose, such as a horizontal direction or an oblique direction.

The details of the attachment of the damper 12 are not described in Patent Document 1, but the conventional general method is accurate in advance between the attachment surface of the heavy object 10 and the attachment surface of the bracket 13. The length of the damper 12 is adjusted at the time of factory shipment so that the distance between the mounting surfaces at both ends of the damper 12 is slightly shorter (for example, about 3 to 5 mm) than the mounting interval.
At the site, the damper 12 is temporarily set between the attachment surface of the heavy object 10 and the attachment surface of the bracket 13. First, either the attachment surface of the heavy object 10 or the attachment surface of the bracket 13, for example, the upper surface of the bracket 13 is used. The lower end portion of the damper 12 is fixed with a bolt 15, and then the bolt 15 is passed between the attachment surface of the heavy object 10 and the attachment surface of the upper end portion of the damper 12. It is stretched only and is brought into close contact with the lower surface of the heavy article 10 and fixed. A large force is required to expand and contract the damper.

Japanese Patent Laying-Open No. 2005-299078.

In such a conventional general attachment method, the other end of the damper 12 must be brought into close contact with a large force in order to extend the damper 12 by turning the bolt 15 by hand, so that the damper 12 is brought into close contact during temporary setting. It is desirable that the gap is as small as possible.
However, if this gap is small, when the damper 12 is set between the mounting surface of the heavy object 10 and the mounting surface of the bracket 13, the temporary setting may occur if the mounting surface is slightly uneven or inclined. It is impossible or extremely difficult. In addition, a plurality of bolts 15 are used for attachment after temporary setting, but the hole alignment operation becomes difficult.
On the contrary, if the clearance is made large, temporary setting becomes easy. However, a large force is required to extend the damper 12 by manually tightening the bolt 15, and there is a problem that it is impossible to make the contact. It was.
The present invention provides a damper clamping device and a damper mounting method using this device, in which the temporary setting operation of the damper is easy and the hole alignment of the bolt is reliable and easy.

  A damper clamping device according to the present invention is a device for clamping a damper 12 for absorbing an impact between a structure 11 and a heavy object 10, wherein the damper 12 is interposed between the structure 11 and the heavy object 10. Temporarily set, one end of the damper 12 is fixedly attached to one of the structure 11 and the heavy object 10, and the other end of the damper 12 is attached to the other attachment surface 25 of the structure 11 and the heavy object 10. The mounting hole 29 at the other end of the damper 12 facing the gap 26 and the mounting hole 30 provided on the other mounting surface of the structure 11 or the heavy article 10. A jack 28 with a through-hole is installed facing the other side, and the jack 28 with a through-hole is penetrated from a mounting hole 29 on the opposite side to which the jack 28 with a through-hole is attached. Te mounting tapered thread 31, characterized by comprising in close contact with the other one of the mounting surface of the other end structure 11 and the heavy 10 of the damper 12 by driving the through hole with the jack 28.

A damper mounting method according to the present invention is a damper mounting method for mounting a damper 12 for absorbing an impact between a bridge structure 11 and a heavy object 10.
The damper 12 is temporarily set between the structure 11 and the heavy object 10, and one end of the damper 12 is fixedly attached to either the structure 11 or the heavy object 10, and the other end of the damper 12 is structured. Step 1 for allowing the object 11 and the heavy object 10 to face the other mounting surface 25 with a gap 26;
The mounting hole 29 at the other end of the damper 12 facing the gap 26 and the mounting hole 30 provided on the other mounting surface 25 of the structure 11 or the heavy object 10 are faced. Step 2 of installing the jack 28 with a through hole and attaching the taper screw 31 through the jack 28 with the through hole from the opposite mounting hole 29 to which the jack 28 with the through hole is attached;
The jack 28 with a through hole is driven to bring the other end of the damper 12 into close contact with the other mounting surface 25 of the structure 11 or the heavy object 10, and the mounting hole 29 in which the jack 28 with a through hole is not installed; Step 3 for inserting and fixing the bolt 15 between the mounting hole 30;
Step 4 comprises removing the jack 28 with a through hole and the taper screw 31, and inserting and fixing the bolt 15 between the removed mounting hole 29 and the mounting hole 30.

  Since the present invention is the apparatus and the work step as described above, a large gap can be provided between the other end of the damper and the attachment surface of either the structure or the heavy object so that the attachment work can be smoothly performed. . Therefore, work efficiency is increased. In addition, since the taper screw is used, even if there is a positional shift between the damper side and the attachment hole on the structure or heavy object side, it can be matched in the tightening process.

In addition, mounting clevises for connecting the brackets to the structure on the damper side clevises at both ends of the damper are pivotally attached with clevis pins, and facing the connecting part between the damper side clevis and the mounting clevis to prevent the clevis from falling. By using a metal fitting to prevent the mounting clevis from rotating, the damper mounting method can be made more reliable.
In step 2, the mounting holes with two or more through holes are separated from the mounting holes with a plurality of holes for connecting the dampers, so that the positions of the mounting holes with the plurality of holes are more accurately determined. Can be matched.

FIG. 2 is an explanatory view of Step 1, showing an embodiment of a damper mounting method according to the present invention. It is explanatory drawing of step 2 of the attachment method of the damper by this invention, (a) is the enlarged view of FIG. 1 seen from the front, (b) is a side view of (a). It is explanatory drawing of step 3 of the attachment method of the damper by this invention. It is explanatory drawing of step 4 of the attachment method of the damper by this invention. It is the partially cutaway enlarged view explaining the detail of the volt | bolt 15 used for the clamping device of the damper by this invention. 2 is a plan view of a damper 12. FIG. It is explanatory drawing of Example 2 of the attachment method of the damper by this invention. It is explanatory drawing of the attachment method of the conventional damper.

  A damper clamping device according to the present invention is a device for clamping a damper 12 for absorbing an impact between a structure 11 and a heavy object 10, wherein the damper 12 is interposed between the structure 11 and the heavy object 10. Temporarily set, one end of the damper 12 is fixedly attached to one of the structure 11 and the heavy object 10, and the other end of the damper 12 is attached to the other attachment surface 25 of the structure 11 and the heavy object 10. The mounting hole 29 at the other end of the damper 12 facing the gap 26 and the mounting hole 30 provided on the other mounting surface of the structure 11 or the heavy article 10. A jack 28 with a through-hole is installed facing the other side, and the jack 28 with a through-hole is penetrated from a mounting hole 29 on the opposite side to which the jack 28 with a through-hole is attached. Te mounting tapered thread 31, characterized by comprising in close contact with the other one of the mounting surface of the other end structure 11 and the heavy 10 of the damper 12 by driving the through hole with the jack 28.

A damper mounting method according to the present invention is a damper mounting method for mounting a damper 12 for absorbing an impact between a bridge structure 11 and a heavy object 10.
The damper 12 is temporarily set between the structure 11 and the heavy object 10, and one end of the damper 12 is fixedly attached to either the structure 11 or the heavy object 10, and the other end of the damper 12 is structured. Step 1 for allowing the object 11 and the heavy object 10 to face the other mounting surface 25 with a gap 26;
The mounting hole 29 at the other end of the damper 12 facing the gap 26 and the mounting hole 30 provided on the other mounting surface 25 of the structure 11 or the heavy object 10 are faced. A step 2 of installing a jack 28 with a through hole and attaching a taper screw 31 through the mounting hole 29, the mounting hole 30 and the jack 28 with a through hole from the opposite side of the jack 28 with a through hole;
The jack 28 with a through hole is driven to bring the other end of the damper 12 into close contact with the other mounting surface 25 of the structure 11 or the heavy object 10, and the mounting hole 29 in which the jack 28 with a through hole is not installed; Step 3 for inserting and fixing the bolt 15 between the mounting hole 30;
Step 4 comprises removing the jack 28 with a through hole and the taper screw 31, and inserting and fixing the bolt 15 between the removed mounting hole 29 and the mounting hole 30.

  Mounting clevises 21 for connecting the structure 11 and the bracket 13 to the damper-side clevises 19 at both ends of the damper 12 are rotatably attached by clevis pins 27, and the connecting portions of the damper-side clevis 19 and the mounting clevis 21 are connected. By using a wire that is provided with a suspension wire 34 to prevent the mounting clevis 21 from rotating, the workability can be further improved.

  Step 2 is more accurate in aligning several mounting holes 29 by disposing two or more through hole jacks 28 in a plurality of mounting holes 29 for connecting the dampers 12. become.

A damper clamping device according to the present invention and a damper mounting method using this device will be described with reference to the drawings.
In FIG. 1, a heavy object 10 such as a bridge girder is provided on a structure 11 such as a bridge pier via a support shoe or the like, and a bracket 13 is attached to the lower surface of the heavy object 10. The damper 12 is attached between the vertical attachment surface 25 and the vertical attachment surface 39 of the structure 11.
Mounting clevises 21 and 22 are rotatably connected to damper-side clevises 19 and 20 at both ends of the damper 12 by clevis pins 27, respectively.
In the present invention, the distance from the mounting surface 25 of the bracket 13 to the mounting surface 39 of the structure 11 can be easily set up to the mounting surface 24 of the mounting clevises 21 and 22 of the damper 12 so that the damper 12 can be temporarily set. The damper 12 is adjusted so that the gap 26 has a sufficient length. Specifically, the damper is shrunk so that the gap 26 between the mounting surface 24 of the mounting clevis 21 and the mounting surface 25 of the bracket 13 is about 30 to 40 mm.
The damper mounting method of the present invention having the above configuration will be described in the order of each step.

Step 1 (Figure 1)
In this step, the damper 12 is suspended between the attachment surface 39 of the structure 11 and the attachment surface 25 of the bracket 13 by the two suspension wires 34 on the lower surface of the heavy article 10. The suspended damper 12 is configured such that one attachment clevis 22 is aligned with the anchor bolt 23 of the structure 11 in the chain block of the suspension wire 34, and the attachment hole 29 of the other attachment clevis 21 and the bracket 13 side. Are temporarily set in accordance with the mounting holes 30 of FIG. At this time, since the gap 26 has a sufficient interval, the damper 12 is lifted smoothly, and the temporary setting is easily performed.
Since the mounting clevises 22 and 21 of the damper 12 are connected to the damper-side clevises 20 and 19 by clevis pins 27, when the damper 12 is lifted horizontally, the mounting clevises 22 and 21 tilt, so the axis of the damper 12 It is preferable to fit a clevis fall prevention fitting 35 as shown by a two-dot chain line in FIG.
When the damper 12 is temporarily set at the mounting location, one mounting clevis 22 is closely fixed to the mounting surface 39 with the anchor bolt 23.

Step 2 (FIGS. 2A and 2B, FIG. 5 and FIG. 6)
In this step, the four vertical mounting holes 29 provided on the flange of the other mounting clevis 21 are substantially aligned with the mounting holes 30 on the bracket 13 side, and as shown in FIG. Tapered screws 31 are inserted into the lower left, upper right, and lower right through the mounting plate 36 and the washer 37 from the flange side of the mounting clevis 21. Since the taper screw 31 is tapered in the middle, it can be easily inserted even if the mounting hole 29 and the mounting hole 30 are slightly misaligned. A jack 28 with a through hole called a center hole jack (registered trademark) with a hole in the center is inserted into a portion of the taper screw 31 protruding from the flange of the bracket 13, and a support plate is inserted into the portion further protruding from the jack 28 with through hole. 32 is attached and held by the nut 33. Similarly, the jacks 28 with through holes are attached to the four taper screws 31 and are held by the nuts 33.
In this example, the through-hole jacks 28 are attached to the four corners that are separated from each other, but may be two diagonal locations such as upper left and lower right or lower left and upper right.

Step 3 (Figure 3)
In this step, pressure oil is sent from the pump 42 to the four jacks 28 with through holes, and the ram 41 is extended from the cylinder 40. Then, a compressive force acts between the jack 28 with the through hole and the head portion 38 of the taper screw 31, the damper 12 is extended, the mounting clevis 21 on the damper 12 side is drawn, the gap 26 is gradually narrowed, and the bracket 13 It adheres closely to the mounting surface 25. In this step 3, since the taper screw 31 is used, even if there is a slight misalignment between the mounting hole 29 on the mounting clevis 21 side and the mounting hole 30 on the bracket 13 side, the mounting clevis 21 is in close contact. The position is corrected when moving until it matches. For example, if the damper 12 is for 100 tons, the force for extending and retracting the mounting clevis 21 can be about 10 tons of about 1/10.
When the mounting clevis 21 is in close contact with the bracket 13, the bolt 15 is inserted into the mounting hole 30 of the bracket 13 from the mounting hole 29 side of the mounting clevis 21 into the portion where the jack 28 with through hole is not mounted, and a nut is inserted from the bracket 13 side. Temporarily fix.

Step 4 (Fig. 4)
In this step, the pressure oil from the pump 42 to the four through-hole jacks 28 is released, the ram 41 is contracted, the support plate 32 is removed, the taper screw 31 is pulled out from the through-hole jack 28, and the through-hole jack 28 is removed. To remove.
The bolt 15 is passed through the mounting hole 29 on the mounting clevis 21 side from the mounting hole 29 side on the mounting clevis 21 side, and is fixed with a nut at the location where the taper screw 31 is pulled out.
After all are fixed, the hanging wire 34, the clevis fall-preventing metal fitting 35, etc. are removed, and the mounting operation is completed.

In the above embodiment, the horizontal mounting method has been described. However, the method can be used as it is even in the vertical direction, the oblique direction, and the like.
In the above-described embodiment, the example in which the jack 28 with the through hole is attached to the bracket 13 side is shown, but it may be attached to the attachment clevis 21 side.

  In the said Example, although the one damper 12 was attached between the structure 11 and the heavy article 10, as shown in FIG. Moreover, when attaching to multiple places, you may make it attach in the direction made different with the absorption direction of an impact.

  DESCRIPTION OF SYMBOLS 10 ... Heavy article, 11 ... Structure, 12 ... Damper, 13 ... Bracket, 14 ... Bearing shoe, 15 ... Bolt, 16 ... Cover, 19 ... Damper side clevis, 20 ... Damper side clevis, 21 ... Mounting clevis, 22 Clevis for mounting, 23 anchor bolt, 24 mounting surface, 25 mounting surface, 26 clearance, 27 clevis pin, 28 jack with through hole, 29 mounting hole, 30 mounting hole, 31 taper screw, 32 ... Support plate, 33 ... Nut, 34 ... Hanging wire, 35 ... Clevis fall prevention metal fitting, 36 ... Supporting plate, 37 ... Washer, 38 ... Head, 39 ... Mounting surface, 40 ... Cylinder, 41 ... Ram, 42 ... Pump.

Claims (7)

  A device for fastening a damper for absorbing an impact between a bridge structure and a heavy object, wherein the damper is temporarily set between the structure and the heavy object, and one end of the damper is connected to the structure and the heavy object. The other end of the damper is fixedly attached to either one of the structure and the heavy object, and the other attachment surface of the damper is exposed with the gap. And a jack with a through hole facing one of the mounting holes on the other mounting surface of the structure or heavy object, and from the opposite mounting hole to which this jack with a through hole is attached A taper screw is attached through the jack with a through hole, and the other end of the damper is brought into close contact with the other mounting surface of the structure or heavy object by driving the jack with the through hole. Clamping device of the damper, characterized and.   A device for fastening a damper for absorbing an impact between a bridge structure and a heavy-weight bracket. Attaching fixedly to the mounting surface of the structure, the mounting clevis at the other end of the damper faces the mounting surface of the bracket with a gap, and a jack with a through hole is installed facing the mounting hole provided in the bracket Then, a taper screw is attached through a mounting hole on the bracket side and a jack with a through hole from a mounting hole provided in a mounting clevis at the other end of the damper, and the jack with a through hole is driven to drive the damper. A damper clamping device, characterized in that the other end is in close contact with the mounting surface of the bracket. In the mounting method of the damper for mounting the damper for absorbing the impact between the bridge structure and the heavy object,
The damper is temporarily set between a structure and a heavy object, and one end of the damper is fixedly attached to either the structure or the heavy object, and the other end of the damper is either a structure or a heavy object. Step 1 with a gap on the other mounting surface,
Install a jack with a through hole so that it faces either the mounting hole on the other end of the damper that faces the gap and the mounting hole on the other mounting surface of the structure or heavy object. Attaching the taper screw through the jack with the through hole from the opposite mounting hole to which the jack with the through hole is attached;
A step of driving the jack with a through hole to bring the other end of the damper into close contact with the other mounting surface of the structure or the heavy object, and inserting and fixing a bolt into the mounting hole where the jack with the through hole is not installed 3 and
A damper mounting method comprising: removing the jack with a through hole and the taper screw, and inserting and fixing a bolt into the removed mounting hole. In the mounting method of the damper for mounting the damper for absorbing the impact between the bridge structure and the heavy weight bracket,
The damper is temporarily set between the structure and the bracket, and the mounting clevis at one end of the damper is fixedly attached to the mounting surface of the structure, and the mounting clevis at the other end of the damper is attached to the mounting surface of the bracket. Step 1 with a gap,
A jack with a through-hole is installed facing the mounting hole provided in the bracket, and the bracket-side mounting hole and the jack with the through-hole are penetrated from the mounting hole provided in the mounting clevis at the other end of the damper. Step 2 to attach the taper screw,
Step 3 of driving the jack with a through hole to bring the other end of the damper into close contact with the mounting surface of the bracket, and inserting and fixing a bolt into the mounting hole where the jack with the through hole is not installed;
A damper mounting method comprising: removing the jack with a through hole and the taper screw, and inserting and fixing a bolt into the removed mounting hole. In the mounting method of the damper for mounting the damper for absorbing the impact between the bridge structure and the heavy weight bracket,
The damper is temporarily set between the structure and the bracket, and the mounting clevis at one end of the damper is fixedly attached to the mounting surface of the structure, and the mounting clevis at the other end of the damper is attached to the mounting surface of the bracket. Step 1 with a gap,
A jack with a through hole is installed facing the mounting hole provided in the clevis for mounting the damper, and the taper screw passes through the mounting hole on the damper and the jack with the through hole from the mounting hole provided in the bracket. Attaching step 2,
Step 3 of driving the jack with a through hole to bring the other end of the damper into close contact with the mounting surface of the bracket, and inserting and fixing a bolt into the mounting hole where the jack with the through hole is not installed;
A damper mounting method comprising: removing the jack with a through hole and the taper screw, and inserting and fixing a bolt into the removed mounting hole.   Mounting clevises for connecting to the structure and brackets are attached to the damper clevises at both ends of the damper, using clevis pins, and the clevis overturn prevention fittings facing the connecting part between the damper clevis and the mounting clevis. 6. The damper mounting method according to claim 3, wherein the mounting clevis prevents rotation of the mounting clevis.   7. The step 2 is characterized in that two or more jacks with through holes are installed apart from each other in a plurality of mounting holes for connecting dampers. The installation method of the described damper.

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